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Merge tag 'v3.10.107' into update
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4
LT		 68
69#define NFSDBG_FACILITY NFSDBG_PROC
70
2066fe89 71#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 72#define NFS4_POLL_RETRY_MAX (15*HZ)
73
cdd4e68b 74struct nfs4_opendata;
864472e9 75static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 76static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 77static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 78static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 79static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
bae36241 80static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
9936781d 81static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 82static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
83 struct nfs_fattr *fattr, struct iattr *sattr,
84 struct nfs4_state *state);
f062eb6c 85#ifdef CONFIG_NFS_V4_1
1cab0652
BS		 86static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
87static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
f062eb6c 88#endif
1da177e4 89/* Prevent leaks of NFSv4 errors into userland */
46f72f57 90static int nfs4_map_errors(int err)
1da177e4 91{
52567b03
TM		 92 if (err >= -1000)
93 return err;
94 switch (err) {
95 case -NFS4ERR_RESOURCE:
30005121
WAA		 96 case -NFS4ERR_LAYOUTTRYLATER:
97 case -NFS4ERR_RECALLCONFLICT:
52567b03 98 return -EREMOTEIO;
7ebb9315
BS		 99 case -NFS4ERR_WRONGSEC:
100 return -EPERM;
3ddeb7c5
TM		 101 case -NFS4ERR_BADOWNER:
102 case -NFS4ERR_BADNAME:
103 return -EINVAL;
fb13bfa7
TM		 104 case -NFS4ERR_SHARE_DENIED:
105 return -EACCES;
f25efd85
SD		 106 case -NFS4ERR_MINOR_VERS_MISMATCH:
107 return -EPROTONOSUPPORT;
6168f62c
WAA		 108 case -NFS4ERR_ACCESS:
109 return -EACCES;
6e3cf241
TM		 110 case -NFS4ERR_FILE_OPEN:
111 return -EBUSY;
52567b03 112 default:
1da177e4 113 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 114 __func__, -err);
52567b03 115 break;
1da177e4 116 }
52567b03 117 return -EIO;
1da177e4
LT		 118}
119
120/*
121 * This is our standard bitmap for GETATTR requests.
122 */
1549210f 123const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 124 FATTR4_WORD0_TYPE
125 | FATTR4_WORD0_CHANGE
126 | FATTR4_WORD0_SIZE
127 | FATTR4_WORD0_FSID
128 | FATTR4_WORD0_FILEID,
129 FATTR4_WORD1_MODE
130 | FATTR4_WORD1_NUMLINKS
131 | FATTR4_WORD1_OWNER
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
138};
139
1549210f
TM		 140static const u32 nfs4_pnfs_open_bitmap[3] = {
141 FATTR4_WORD0_TYPE
142 | FATTR4_WORD0_CHANGE
143 | FATTR4_WORD0_SIZE
144 | FATTR4_WORD0_FSID
145 | FATTR4_WORD0_FILEID,
146 FATTR4_WORD1_MODE
147 | FATTR4_WORD1_NUMLINKS
148 | FATTR4_WORD1_OWNER
149 | FATTR4_WORD1_OWNER_GROUP
150 | FATTR4_WORD1_RAWDEV
151 | FATTR4_WORD1_SPACE_USED
152 | FATTR4_WORD1_TIME_ACCESS
153 | FATTR4_WORD1_TIME_METADATA
154 | FATTR4_WORD1_TIME_MODIFY,
155 FATTR4_WORD2_MDSTHRESHOLD
156};
157
e23008ec
AA		 158static const u32 nfs4_open_noattr_bitmap[3] = {
159 FATTR4_WORD0_TYPE
160 | FATTR4_WORD0_CHANGE
161 | FATTR4_WORD0_FILEID,
162};
163
1da177e4
LT		 164const u32 nfs4_statfs_bitmap[2] = {
165 FATTR4_WORD0_FILES_AVAIL
166 | FATTR4_WORD0_FILES_FREE
167 | FATTR4_WORD0_FILES_TOTAL,
168 FATTR4_WORD1_SPACE_AVAIL
169 | FATTR4_WORD1_SPACE_FREE
170 | FATTR4_WORD1_SPACE_TOTAL
171};
172
4ce79717 173const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 174 FATTR4_WORD0_MAXLINK
175 | FATTR4_WORD0_MAXNAME,
176 0
177};
178
dae100c2 179const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 180 | FATTR4_WORD0_MAXREAD
181 | FATTR4_WORD0_MAXWRITE
182 | FATTR4_WORD0_LEASE_TIME,
55b6e774 183 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 184 | FATTR4_WORD1_FS_LAYOUT_TYPES,
185 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 186};
187
830b8e33
MN		 188const u32 nfs4_fs_locations_bitmap[2] = {
189 FATTR4_WORD0_TYPE
190 | FATTR4_WORD0_CHANGE
191 | FATTR4_WORD0_SIZE
192 | FATTR4_WORD0_FSID
193 | FATTR4_WORD0_FILEID
194 | FATTR4_WORD0_FS_LOCATIONS,
195 FATTR4_WORD1_MODE
196 | FATTR4_WORD1_NUMLINKS
197 | FATTR4_WORD1_OWNER
198 | FATTR4_WORD1_OWNER_GROUP
199 | FATTR4_WORD1_RAWDEV
200 | FATTR4_WORD1_SPACE_USED
201 | FATTR4_WORD1_TIME_ACCESS
202 | FATTR4_WORD1_TIME_METADATA
203 | FATTR4_WORD1_TIME_MODIFY
204 | FATTR4_WORD1_MOUNTED_ON_FILEID
205};
206
bc4785cd 207static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 208 struct nfs4_readdir_arg *readdir)
209{
0dbb4c67 210 __be32 *start, *p;
1da177e4 211
1da177e4 212 if (cookie > 2) {
b7ef1956 213 readdir->cookie = cookie;
1da177e4
LT		 214 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
215 return;
216 }
217
218 readdir->cookie = 0;
219 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
220 if (cookie == 2)
221 return;
222
223 /*
224 * NFSv4 servers do not return entries for '.' and '..'
225 * Therefore, we fake these entries here. We let '.'
226 * have cookie 0 and '..' have cookie 1. Note that
227 * when talking to the server, we always send cookie 0
228 * instead of 1 or 2.
229 */
2b86ce2d 230 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 231
232 if (cookie == 0) {
233 *p++ = xdr_one; /* next */
234 *p++ = xdr_zero; /* cookie, first word */
235 *p++ = xdr_one; /* cookie, second word */
236 *p++ = xdr_one; /* entry len */
237 memcpy(p, ".\0\0\0", 4); /* entry */
238 p++;
239 *p++ = xdr_one; /* bitmap length */
240 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
241 *p++ = htonl(8); /* attribute buffer length */
4e769b93 242 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 243 }
244
245 *p++ = xdr_one; /* next */
246 *p++ = xdr_zero; /* cookie, first word */
247 *p++ = xdr_two; /* cookie, second word */
248 *p++ = xdr_two; /* entry len */
249 memcpy(p, "..\0\0", 4); /* entry */
250 p++;
251 *p++ = xdr_one; /* bitmap length */
252 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
253 *p++ = htonl(8); /* attribute buffer length */
4e769b93 254 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 255
256 readdir->pgbase = (char *)p - (char *)start;
257 readdir->count -= readdir->pgbase;
2b86ce2d 258 kunmap_atomic(start);
1da177e4
LT		 259}
260
65de872e
TM		 261static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
262{
263 int res = 0;
264
265 might_sleep();
266
267 if (*timeout <= 0)
268 *timeout = NFS4_POLL_RETRY_MIN;
269 if (*timeout > NFS4_POLL_RETRY_MAX)
270 *timeout = NFS4_POLL_RETRY_MAX;
6fa3eb70 271 freezable_schedule_timeout_killable_unsafe(*timeout);
65de872e
TM		 272 if (fatal_signal_pending(current))
273 res = -ERESTARTSYS;
274 *timeout <<= 1;
275 return res;
276}
277
278/* This is the error handling routine for processes that are allowed
279 * to sleep.
280 */
b064eca2 281static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 282{
283 struct nfs_client *clp = server->nfs_client;
9e33bed5 284 struct nfs4_state *state = exception->state;
3114ea7a 285 struct inode *inode = exception->inode;
65de872e
TM		 286 int ret = errorcode;
287
288 exception->retry = 0;
289 switch(errorcode) {
290 case 0:
291 return 0;
3114ea7a 292 case -NFS4ERR_OPENMODE:
011e2a7f 293 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 294 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 295 exception->retry = 1;
296 return 0;
297 }
298 if (state == NULL)
299 break;
5d422301
TM		 300 ret = nfs4_schedule_stateid_recovery(server, state);
301 if (ret < 0)
302 break;
3114ea7a 303 goto wait_on_recovery;
a1d0b5ee 304 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 305 case -NFS4ERR_ADMIN_REVOKED:
306 case -NFS4ERR_BAD_STATEID:
b570a975
TM		 307 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
308 nfs_remove_bad_delegation(inode);
309 exception->retry = 1;
310 break;
311 }
9e33bed5
TM		 312 if (state == NULL)
313 break;
5d422301
TM		 314 ret = nfs4_schedule_stateid_recovery(server, state);
315 if (ret < 0)
316 break;
0400a6b0 317 goto wait_on_recovery;
0ced63d1 318 case -NFS4ERR_EXPIRED:
5d422301
TM		 319 if (state != NULL) {
320 ret = nfs4_schedule_stateid_recovery(server, state);
321 if (ret < 0)
322 break;
323 }
65de872e 324 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 325 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 326 nfs4_schedule_lease_recovery(clp);
327 goto wait_on_recovery;
03391693 328#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 329 case -NFS4ERR_BADSESSION:
330 case -NFS4ERR_BADSLOT:
331 case -NFS4ERR_BAD_HIGH_SLOT:
332 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
333 case -NFS4ERR_DEADSESSION:
334 case -NFS4ERR_SEQ_FALSE_RETRY:
335 case -NFS4ERR_SEQ_MISORDERED:
336 dprintk("%s ERROR: %d Reset session\n", __func__,
337 errorcode);
9f594791 338 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 339 goto wait_on_recovery;
03391693 340#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 341 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 342 if (exception->timeout > HZ) {
343 /* We have retried a decent amount, time to
344 * fail
345 */
346 ret = -EBUSY;
347 break;
348 }
65de872e
TM		 349 case -NFS4ERR_GRACE:
350 case -NFS4ERR_DELAY:
351 ret = nfs4_delay(server->client, &exception->timeout);
352 if (ret != 0)
353 break;
a8a4ae3a 354 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 355 case -NFS4ERR_OLD_STATEID:
356 exception->retry = 1;
b064eca2
TM		 357 break;
358 case -NFS4ERR_BADOWNER:
359 /* The following works around a Linux server bug! */
360 case -NFS4ERR_BADNAME:
361 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
362 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
363 exception->retry = 1;
364 printk(KERN_WARNING "NFS: v4 server %s "
365 "does not accept raw "
366 "uid/gids. "
367 "Reenabling the idmapper.\n",
368 server->nfs_client->cl_hostname);
369 }
65de872e
TM		 370 }
371 /* We failed to handle the error */
372 return nfs4_map_errors(ret);
0400a6b0 373wait_on_recovery:
a2c0b9e2
TM		 374 ret = nfs4_wait_clnt_recover(clp);
375 if (ret == 0)
376 exception->retry = 1;
377 return ret;
65de872e
TM		 378}
379
380
452e9352 381static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 382{
1da177e4
LT		 383 spin_lock(&clp->cl_lock);
384 if (time_before(clp->cl_last_renewal,timestamp))
385 clp->cl_last_renewal = timestamp;
386 spin_unlock(&clp->cl_lock);
387}
388
452e9352
TM		 389static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
390{
391 do_renew_lease(server->nfs_client, timestamp);
392}
393
cccef3b9
AA		 394#if defined(CONFIG_NFS_V4_1)
395
d185a334 396static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 397{
e3725ec0 398 struct nfs4_session *session;
13615871 399 struct nfs4_slot_table *tbl;
c10e4498 400 bool send_new_highest_used_slotid = false;
13615871 401
dfb4f309 402 if (!res->sr_slot) {
13615871
AA		 403 /* just wake up the next guy waiting since
404 * we may have not consumed a slot after all */
691daf3b 405 dprintk("%s: No slot\n", __func__);
35dc1d74 406 return;
13615871 407 }
e3725ec0
TM		 408 tbl = res->sr_slot->table;
409 session = tbl->session;
ea028ac9 410
35dc1d74 411 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 412 /* Be nice to the server: try to ensure that the last transmitted
413 * value for highest_user_slotid <= target_highest_slotid
414 */
415 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
416 send_new_highest_used_slotid = true;
417
b75ad4cd
TM		 418 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
419 send_new_highest_used_slotid = false;
420 goto out_unlock;
421 }
f4af6e2a 422 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 423
424 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
425 send_new_highest_used_slotid = false;
b75ad4cd 426out_unlock:
35dc1d74 427 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 428 res->sr_slot = NULL;
c10e4498
TM		 429 if (send_new_highest_used_slotid)
430 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 431}
432
14516c3a 433static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 434{
e3725ec0 435 struct nfs4_session *session;
933602e3 436 struct nfs4_slot *slot;
14516c3a 437 struct nfs_client *clp;
ac20d163 438 bool interrupted = false;
85563073 439 int ret = 1;
b0df806c 440
468f8613
BS		 441 /* don't increment the sequence number if the task wasn't sent */
442 if (!RPC_WAS_SENT(task))
b0df806c
AA		 443 goto out;
444
933602e3 445 slot = res->sr_slot;
e3725ec0 446 session = slot->table->session;
933602e3 447
ac20d163
TM		 448 if (slot->interrupted) {
449 slot->interrupted = 0;
450 interrupted = true;
451 }
452
691daf3b 453 /* Check the SEQUENCE operation status */
14516c3a
TM		 454 switch (res->sr_status) {
455 case 0:
b0df806c 456 /* Update the slot's sequence and clientid lease timer */
933602e3 457 ++slot->seq_nr;
e3725ec0 458 clp = session->clp;
8e63b6a8 459 do_renew_lease(clp, res->sr_timestamp);
0629e370 460 /* Check sequence flags */
b4410c2f
TM		 461 if (res->sr_status_flags != 0)
462 nfs4_schedule_lease_recovery(clp);
464ee9f9 463 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 464 break;
ac20d163
TM		 465 case 1:
466 /*
467 * sr_status remains 1 if an RPC level error occurred.
468 * The server may or may not have processed the sequence
469 * operation..
470 * Mark the slot as having hosted an interrupted RPC call.
471 */
472 slot->interrupted = 1;
473 goto out;
14516c3a
TM		 474 case -NFS4ERR_DELAY:
475 /* The server detected a resend of the RPC call and
476 * returned NFS4ERR_DELAY as per Section 2.10.6.2
477 * of RFC5661.
478 */
df2fabff 479 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 480 __func__,
df2fabff 481 slot->slot_nr,
933602e3 482 slot->seq_nr);
14516c3a 483 goto out_retry;
85563073
TM		 484 case -NFS4ERR_BADSLOT:
485 /*
486 * The slot id we used was probably retired. Try again
487 * using a different slot id.
488 */
e8794440
TM		 489 goto retry_nowait;
490 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 491 /*
492 * Was the last operation on this sequence interrupted?
493 * If so, retry after bumping the sequence number.
494 */
495 if (interrupted) {
496 ++slot->seq_nr;
497 goto retry_nowait;
498 }
e8794440
TM		 499 /*
500 * Could this slot have been previously retired?
501 * If so, then the server may be expecting seq_nr = 1!
502 */
8e63b6a8
TM		 503 if (slot->seq_nr != 1) {
504 slot->seq_nr = 1;
505 goto retry_nowait;
506 }
507 break;
e8794440
TM		 508 case -NFS4ERR_SEQ_FALSE_RETRY:
509 ++slot->seq_nr;
510 goto retry_nowait;
14516c3a
TM		 511 default:
512 /* Just update the slot sequence no. */
933602e3 513 ++slot->seq_nr;
b0df806c
AA		 514 }
515out:
516 /* The session may be reset by one of the error handlers. */
517 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 518 nfs41_sequence_free_slot(res);
85563073 519 return ret;
e8794440
TM		 520retry_nowait:
521 if (rpc_restart_call_prepare(task)) {
522 task->tk_status = 0;
523 ret = 0;
524 }
525 goto out;
14516c3a 526out_retry:
d05dd4e9 527 if (!rpc_restart_call(task))
14516c3a
TM		 528 goto out;
529 rpc_delay(task, NFS4_POLL_RETRY_MAX);
530 return 0;
b0df806c
AA		 531}
532
14516c3a
TM		 533static int nfs4_sequence_done(struct rpc_task *task,
534 struct nfs4_sequence_res *res)
df896455 535{
e3725ec0 536 if (res->sr_slot == NULL)
14516c3a
TM		 537 return 1;
538 return nfs41_sequence_done(task, res);
df896455
TM		 539}
540
9d12b216
TM		 541static void nfs41_init_sequence(struct nfs4_sequence_args *args,
542 struct nfs4_sequence_res *res, int cache_reply)
543{
2b2fa717 544 args->sa_slot = NULL;
9d12b216 545 args->sa_cache_this = 0;
8fe72bac 546 args->sa_privileged = 0;
9d12b216
TM		 547 if (cache_reply)
548 args->sa_cache_this = 1;
9d12b216
TM		 549 res->sr_slot = NULL;
550}
551
8fe72bac
TM		 552static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
553{
554 args->sa_privileged = 1;
555}
556
dc70d7b3 557int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 558 struct nfs4_sequence_args *args,
559 struct nfs4_sequence_res *res,
ce5039c1
AA		 560 struct rpc_task *task)
561{
fbcd4abc
AA		 562 struct nfs4_slot *slot;
563 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 564
565 dprintk("--> %s\n", __func__);
ce5039c1 566 /* slot already allocated? */
dfb4f309 567 if (res->sr_slot != NULL)
d9afbd1b 568 goto out_success;
ce5039c1 569
fbcd4abc
AA		 570 tbl = &session->fc_slot_table;
571
69d206b5
TM		 572 task->tk_timeout = 0;
573
fbcd4abc 574 spin_lock(&tbl->slot_tbl_lock);
774d5f14 575 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 576 !args->sa_privileged) {
0b1c8fc4 577 /* The state manager will wait until the slot table is empty */
0b1c8fc4 578 dprintk("%s session is draining\n", __func__);
7b939a3f 579 goto out_sleep;
689cf5c1
AB		 580 }
581
2dc03b7f 582 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 583 if (IS_ERR(slot)) {
584 /* If out of memory, try again in 1/4 second */
585 if (slot == ERR_PTR(-ENOMEM))
586 task->tk_timeout = HZ >> 2;
fbcd4abc 587 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 588 goto out_sleep;
fbcd4abc
AA		 589 }
590 spin_unlock(&tbl->slot_tbl_lock);
591
2b2fa717 592 args->sa_slot = slot;
fbcd4abc 593
2dc03b7f
TM		 594 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
595 slot->slot_nr, slot->seq_nr);
fbcd4abc 596
dfb4f309 597 res->sr_slot = slot;
8e63b6a8 598 res->sr_timestamp = jiffies;
2a6e26cd 599 res->sr_status_flags = 0;
fbcd4abc
AA		 600 /*
601 * sr_status is only set in decode_sequence, and so will remain
602 * set to 1 if an rpc level failure occurs.
603 */
604 res->sr_status = 1;
d9afbd1b
TM		 605out_success:
606 rpc_call_start(task);
ce5039c1 607 return 0;
7b939a3f 608out_sleep:
8fe72bac
TM		 609 /* Privileged tasks are queued with top priority */
610 if (args->sa_privileged)
1e1093c7
TM		 611 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
612 NULL, RPC_PRIORITY_PRIVILEGED);
613 else
614 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 615 spin_unlock(&tbl->slot_tbl_lock);
616 return -EAGAIN;
ce5039c1 617}
dc70d7b3 618EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 619
035168ab 620int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 621 struct nfs4_sequence_args *args,
622 struct nfs4_sequence_res *res,
ce5039c1
AA		 623 struct rpc_task *task)
624{
035168ab 625 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 626 int ret = 0;
627
d9afbd1b
TM		 628 if (session == NULL) {
629 rpc_call_start(task);
035168ab 630 goto out;
d9afbd1b 631 }
035168ab 632
df2fabff 633 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 634 __func__, session->clp, session, res->sr_slot ?
df2fabff 635 res->sr_slot->slot_nr : -1);
ce5039c1 636
9d12b216 637 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 638out:
639 dprintk("<-- %s status=%d\n", __func__, ret);
640 return ret;
641}
642
643struct nfs41_call_sync_data {
035168ab 644 const struct nfs_server *seq_server;
ce5039c1
AA		 645 struct nfs4_sequence_args *seq_args;
646 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 647};
648
649static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
650{
651 struct nfs41_call_sync_data *data = calldata;
6ba7db34 652 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 653
035168ab
TM		 654 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
655
d9afbd1b 656 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 657}
658
69ab40c4
AA		 659static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
660{
661 struct nfs41_call_sync_data *data = calldata;
662
14516c3a 663 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 664}
665
17280175 666static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 667 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 668 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 669};
670
7c513058
BS		 671static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
672 struct nfs_server *server,
ce5039c1
AA		 673 struct rpc_message *msg,
674 struct nfs4_sequence_args *args,
8fe72bac 675 struct nfs4_sequence_res *res)
ce5039c1
AA		 676{
677 int ret;
678 struct rpc_task *task;
679 struct nfs41_call_sync_data data = {
035168ab 680 .seq_server = server,
ce5039c1
AA		 681 .seq_args = args,
682 .seq_res = res,
ce5039c1
AA		 683 };
684 struct rpc_task_setup task_setup = {
7c513058 685 .rpc_client = clnt,
ce5039c1
AA		 686 .rpc_message = msg,
687 .callback_ops = &nfs41_call_sync_ops,
688 .callback_data = &data
689 };
690
ce5039c1
AA		 691 task = rpc_run_task(&task_setup);
692 if (IS_ERR(task))
693 ret = PTR_ERR(task);
694 else {
695 ret = task->tk_status;
696 rpc_put_task(task);
697 }
698 return ret;
699}
700
df896455 701#else
8fe72bac 702static
9d12b216
TM		 703void nfs41_init_sequence(struct nfs4_sequence_args *args,
704 struct nfs4_sequence_res *res, int cache_reply)
705{
706}
707
8fe72bac
TM		 708static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
709{
710}
711
712
14516c3a
TM		 713static int nfs4_sequence_done(struct rpc_task *task,
714 struct nfs4_sequence_res *res)
df896455 715{
14516c3a 716 return 1;
df896455 717}
cccef3b9
AA		 718#endif /* CONFIG_NFS_V4_1 */
719
fd0c0953 720static
7c513058
BS		 721int _nfs4_call_sync(struct rpc_clnt *clnt,
722 struct nfs_server *server,
cccef3b9
AA		 723 struct rpc_message *msg,
724 struct nfs4_sequence_args *args,
fd0c0953 725 struct nfs4_sequence_res *res)
cccef3b9 726{
7c513058 727 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 728}
729
fd0c0953 730static
7c513058
BS		 731int nfs4_call_sync(struct rpc_clnt *clnt,
732 struct nfs_server *server,
e73b83f2
BS		 733 struct rpc_message *msg,
734 struct nfs4_sequence_args *args,
735 struct nfs4_sequence_res *res,
736 int cache_reply)
737{
fd0c0953 738 nfs41_init_sequence(args, res, cache_reply);
7c513058 739 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
fd0c0953 740 args, res);
e73b83f2 741}
cccef3b9 742
38478b24 743static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 744{
38478b24 745 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 746
38478b24 747 spin_lock(&dir->i_lock);
359d7d1c 748 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 749 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 750 nfs_force_lookup_revalidate(dir);
a9a4a87a 751 dir->i_version = cinfo->after;
de242c0b 752 nfs_fscache_invalidate(dir);
38478b24 753 spin_unlock(&dir->i_lock);
1da177e4
LT		 754}
755
e56e0b78 756struct nfs4_opendata {
c6d00e63 757 struct kref kref;
e56e0b78
TM		 758 struct nfs_openargs o_arg;
759 struct nfs_openres o_res;
cdd4e68b
TM		 760 struct nfs_open_confirmargs c_arg;
761 struct nfs_open_confirmres c_res;
6926afd1
TM		 762 struct nfs4_string owner_name;
763 struct nfs4_string group_name;
e56e0b78 764 struct nfs_fattr f_attr;
e56e0b78 765 struct dentry *dir;
82a2c1b7 766 struct dentry *dentry;
e56e0b78 767 struct nfs4_state_owner *owner;
aac00a8d 768 struct nfs4_state *state;
e56e0b78 769 struct iattr attrs;
26e976a8 770 unsigned long timestamp;
3e309914 771 unsigned int rpc_done : 1;
bdeca1b7 772 unsigned int is_recover : 1;
24ac23ab
TM		 773 int rpc_status;
774 int cancelled;
e56e0b78
TM		 775};
776
49f9a0fa
TM		 777static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
778 int err, struct nfs4_exception *exception)
779{
780 if (err != -EINVAL)
781 return false;
782 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
783 return false;
784 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
785 exception->retry = 1;
786 return true;
787}
788
789static enum open_claim_type4
790nfs4_map_atomic_open_claim(struct nfs_server *server,
791 enum open_claim_type4 claim)
792{
793 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
794 return claim;
795 switch (claim) {
796 default:
797 return claim;
798 case NFS4_OPEN_CLAIM_FH:
799 return NFS4_OPEN_CLAIM_NULL;
800 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
801 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
802 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
803 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
804 }
805}
2ced46c2
TM		 806
807static void nfs4_init_opendata_res(struct nfs4_opendata *p)
808{
809 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 810 p->o_res.seqid = p->o_arg.seqid;
811 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 812 p->o_res.server = p->o_arg.server;
5f657530 813 p->o_res.access_request = p->o_arg.access;
2ced46c2 814 nfs_fattr_init(&p->f_attr);
6926afd1 815 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 816}
817
82a2c1b7 818static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 819 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 820 const struct iattr *attrs,
4a1c0893 821 enum open_claim_type4 claim,
8535b2be 822 gfp_t gfp_mask)
e56e0b78 823{
82a2c1b7 824 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 825 struct inode *dir = parent->d_inode;
826 struct nfs_server *server = NFS_SERVER(dir);
827 struct nfs4_opendata *p;
828
8535b2be 829 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 830 if (p == NULL)
831 goto err;
8535b2be 832 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 833 if (p->o_arg.seqid == NULL)
834 goto err_free;
82a2c1b7
AV		 835 nfs_sb_active(dentry->d_sb);
836 p->dentry = dget(dentry);
e56e0b78
TM		 837 p->dir = parent;
838 p->owner = sp;
839 atomic_inc(&sp->so_count);
dc0b027d
TM		 840 p->o_arg.open_flags = flags;
841 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 842 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
843 * will return permission denied for all bits until close */
844 if (!(flags & O_EXCL)) {
845 /* ask server to check for all possible rights as results
846 * are cached */
847 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
848 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 849 }
7539bbab 850 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 851 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
852 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 853 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 854 p->o_arg.server = server;
855 p->o_arg.bitmask = server->attr_bitmask;
1549210f 856 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
49f9a0fa
TM		 857 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
858 switch (p->o_arg.claim) {
4a1c0893
TM		 859 case NFS4_OPEN_CLAIM_NULL:
860 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
861 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
862 p->o_arg.fh = NFS_FH(dir);
863 break;
864 case NFS4_OPEN_CLAIM_PREVIOUS:
865 case NFS4_OPEN_CLAIM_FH:
866 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
867 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
868 p->o_arg.fh = NFS_FH(dentry->d_inode);
869 }
536e43d1 870 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 871 __be32 verf[2];
d77d76ff 872
e56e0b78
TM		 873 p->o_arg.u.attrs = &p->attrs;
874 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 875
876 verf[0] = jiffies;
877 verf[1] = current->pid;
878 memcpy(p->o_arg.u.verifier.data, verf,
879 sizeof(p->o_arg.u.verifier.data));
e56e0b78 880 }
cdd4e68b
TM		 881 p->c_arg.fh = &p->o_res.fh;
882 p->c_arg.stateid = &p->o_res.stateid;
883 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 884 nfs4_init_opendata_res(p);
c6d00e63 885 kref_init(&p->kref);
e56e0b78
TM		 886 return p;
887err_free:
888 kfree(p);
889err:
890 dput(parent);
891 return NULL;
892}
893
c6d00e63 894static void nfs4_opendata_free(struct kref *kref)
e56e0b78 895{
c6d00e63
TM		 896 struct nfs4_opendata *p = container_of(kref,
897 struct nfs4_opendata, kref);
82a2c1b7 898 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 899
900 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 901 if (p->state != NULL)
902 nfs4_put_open_state(p->state);
c6d00e63
TM		 903 nfs4_put_state_owner(p->owner);
904 dput(p->dir);
82a2c1b7
AV		 905 dput(p->dentry);
906 nfs_sb_deactive(sb);
6926afd1 907 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 908 kfree(p);
909}
910
911static void nfs4_opendata_put(struct nfs4_opendata *p)
912{
913 if (p != NULL)
914 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 915}
916
06f814a3
TM		 917static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
918{
06f814a3
TM		 919 int ret;
920
06f814a3 921 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 922 return ret;
923}
924
dc0b027d 925static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 926{
927 int ret = 0;
dc0b027d 928
536e43d1 929 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 930 goto out;
931 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 932 case FMODE_READ:
88069f77
TM		 933 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
934 && state->n_rdonly != 0;
6ee41268
TM		 935 break;
936 case FMODE_WRITE:
88069f77
TM		 937 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
938 && state->n_wronly != 0;
6ee41268
TM		 939 break;
940 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 941 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
942 && state->n_rdwr != 0;
6ee41268 943 }
dc0b027d 944out:
6ee41268
TM		 945 return ret;
946}
947
dc0b027d 948static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 949{
652f89f6
TM		 950 if (delegation == NULL)
951 return 0;
dc0b027d 952 if ((delegation->type & fmode) != fmode)
aac00a8d 953 return 0;
15c831bf 954 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 955 return 0;
d25be546
TM		 956 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
957 return 0;
b7391f44 958 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 959 return 1;
960}
961
dc0b027d 962static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 963{
dc0b027d 964 switch (fmode) {
e7616923
TM		 965 case FMODE_WRITE:
966 state->n_wronly++;
967 break;
968 case FMODE_READ:
969 state->n_rdonly++;
970 break;
971 case FMODE_READ|FMODE_WRITE:
972 state->n_rdwr++;
973 }
dc0b027d 974 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 975}
976
dc0b027d 977static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 978{
979 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 980 nfs4_stateid_copy(&state->stateid, stateid);
981 nfs4_stateid_copy(&state->open_stateid, stateid);
92b40e93 982 set_bit(NFS_OPEN_STATE, &state->flags);
dc0b027d 983 switch (fmode) {
003707c7
TM		 984 case FMODE_READ:
985 set_bit(NFS_O_RDONLY_STATE, &state->flags);
986 break;
987 case FMODE_WRITE:
988 set_bit(NFS_O_WRONLY_STATE, &state->flags);
989 break;
990 case FMODE_READ|FMODE_WRITE:
991 set_bit(NFS_O_RDWR_STATE, &state->flags);
992 }
e7616923
TM		 993}
994
dc0b027d 995static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 996{
8bda4e4c 997 write_seqlock(&state->seqlock);
dc0b027d 998 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 999 write_sequnlock(&state->seqlock);
003707c7
TM		 1000}
1001
dc0b027d 1002static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1003{
8bda4e4c
TM		 1004 /*
1005 * Protect the call to nfs4_state_set_mode_locked and
1006 * serialise the stateid update
1007 */
45a74b1c 1008 spin_lock(&state->owner->so_lock);
8bda4e4c 1009 write_seqlock(&state->seqlock);
003707c7 1010 if (deleg_stateid != NULL) {
f597c537 1011 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1012 set_bit(NFS_DELEGATED_STATE, &state->flags);
1013 }
1014 if (open_stateid != NULL)
dc0b027d 1015 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c 1016 write_sequnlock(&state->seqlock);
dc0b027d 1017 update_open_stateflags(state, fmode);
ec073428 1018 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1019}
1020
dc0b027d 1021static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1022{
1023 struct nfs_inode *nfsi = NFS_I(state->inode);
1024 struct nfs_delegation *deleg_cur;
1025 int ret = 0;
1026
dc0b027d 1027 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1028
1029 rcu_read_lock();
1030 deleg_cur = rcu_dereference(nfsi->delegation);
1031 if (deleg_cur == NULL)
1032 goto no_delegation;
1033
1034 spin_lock(&deleg_cur->lock);
1035 if (nfsi->delegation != deleg_cur ||
d25be546 1036 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1037 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1038 goto no_delegation_unlock;
1039
1040 if (delegation == NULL)
1041 delegation = &deleg_cur->stateid;
f597c537 1042 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1043 goto no_delegation_unlock;
1044
b7391f44 1045 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1046 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1047 ret = 1;
1048no_delegation_unlock:
1049 spin_unlock(&deleg_cur->lock);
1050no_delegation:
1051 rcu_read_unlock();
1052
1053 if (!ret && open_stateid != NULL) {
dc0b027d 1054 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1055 ret = 1;
1056 }
1057
1058 return ret;
1059}
1060
1061
dc0b027d 1062static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1063{
1064 struct nfs_delegation *delegation;
1065
1066 rcu_read_lock();
1067 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1068 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1069 rcu_read_unlock();
1070 return;
1071 }
1072 rcu_read_unlock();
57ec14c5 1073 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1074}
1075
6ee41268 1076static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1077{
1078 struct nfs4_state *state = opendata->state;
1079 struct nfs_inode *nfsi = NFS_I(state->inode);
1080 struct nfs_delegation *delegation;
f448badd 1081 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1082 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1083 nfs4_stateid stateid;
1084 int ret = -EAGAIN;
1085
aac00a8d 1086 for (;;) {
dc0b027d 1087 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1088 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1089 if (can_open_cached(state, fmode, open_mode)) {
1090 update_open_stateflags(state, fmode);
6ee41268 1091 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1092 goto out_return_state;
1093 }
1094 spin_unlock(&state->owner->so_lock);
1095 }
34310430
TM		 1096 rcu_read_lock();
1097 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1098 if (!can_open_delegated(delegation, fmode)) {
34310430 1099 rcu_read_unlock();
aac00a8d 1100 break;
34310430 1101 }
aac00a8d 1102 /* Save the delegation */
f597c537 1103 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1104 rcu_read_unlock();
fa332941 1105 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1106 if (!opendata->is_recover) {
1107 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1108 if (ret != 0)
1109 goto out;
1110 }
aac00a8d 1111 ret = -EAGAIN;
34310430
TM		 1112
1113 /* Try to update the stateid using the delegation */
dc0b027d 1114 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1115 goto out_return_state;
aac00a8d 1116 }
aac00a8d
TM		 1117out:
1118 return ERR_PTR(ret);
1119out_return_state:
1120 atomic_inc(&state->count);
1121 return state;
1122}
1123
e23008ec
AA		 1124static void
1125nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1126{
1127 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1128 struct nfs_delegation *delegation;
1129 int delegation_flags = 0;
1130
1131 rcu_read_lock();
1132 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1133 if (delegation)
1134 delegation_flags = delegation->flags;
1135 rcu_read_unlock();
1136 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1137 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1138 "returning a delegation for "
1139 "OPEN(CLAIM_DELEGATE_CUR)\n",
1140 clp->cl_hostname);
1141 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1142 nfs_inode_set_delegation(state->inode,
1143 data->owner->so_cred,
1144 &data->o_res);
1145 else
1146 nfs_inode_reclaim_delegation(state->inode,
1147 data->owner->so_cred,
1148 &data->o_res);
1149}
1150
1151/*
1152 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1153 * and update the nfs4_state.
1154 */
1155static struct nfs4_state *
1156_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1157{
1158 struct inode *inode = data->state->inode;
1159 struct nfs4_state *state = data->state;
1160 int ret;
1161
231817ee
WAA		 1162 if (!data->rpc_done) {
1163 if (data->rpc_status) {
1164 ret = data->rpc_status;
1165 goto err;
1166 }
1167 /* cached opens have already been processed */
1168 goto update;
e23008ec
AA		 1169 }
1170
e23008ec
AA		 1171 ret = nfs_refresh_inode(inode, &data->f_attr);
1172 if (ret)
1173 goto err;
1174
1175 if (data->o_res.delegation_type != 0)
1176 nfs4_opendata_check_deleg(data, state);
231817ee 1177update:
e23008ec
AA		 1178 update_open_stateid(state, &data->o_res.stateid, NULL,
1179 data->o_arg.fmode);
1311157d 1180 atomic_inc(&state->count);
e23008ec
AA		 1181
1182 return state;
1183err:
1184 return ERR_PTR(ret);
1185
1186}
1187
1188static struct nfs4_state *
1189_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1190{
1191 struct inode *inode;
1192 struct nfs4_state *state = NULL;
1b370bc2 1193 int ret;
24ac23ab 1194
aac00a8d 1195 if (!data->rpc_done) {
6ee41268 1196 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1197 goto out;
1198 }
1199
1b370bc2 1200 ret = -EAGAIN;
24ac23ab 1201 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1202 goto err;
24ac23ab 1203 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1204 ret = PTR_ERR(inode);
03f28e3a 1205 if (IS_ERR(inode))
1b370bc2
TM		 1206 goto err;
1207 ret = -ENOMEM;
24ac23ab
TM		 1208 state = nfs4_get_open_state(inode, data->owner);
1209 if (state == NULL)
1b370bc2 1210 goto err_put_inode;
e23008ec
AA		 1211 if (data->o_res.delegation_type != 0)
1212 nfs4_opendata_check_deleg(data, state);
34310430 1213 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1214 data->o_arg.fmode);
24ac23ab 1215 iput(inode);
aac00a8d 1216out:
7aa262b5 1217 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1218 return state;
1b370bc2
TM		 1219err_put_inode:
1220 iput(inode);
1221err:
1222 return ERR_PTR(ret);
24ac23ab
TM		 1223}
1224
e23008ec
AA		 1225static struct nfs4_state *
1226nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1227{
1228 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1229 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1230 return _nfs4_opendata_to_nfs4_state(data);
1231}
1232
864472e9
TM		 1233static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1234{
1235 struct nfs_inode *nfsi = NFS_I(state->inode);
1236 struct nfs_open_context *ctx;
1237
1238 spin_lock(&state->inode->i_lock);
1239 list_for_each_entry(ctx, &nfsi->open_files, list) {
1240 if (ctx->state != state)
1241 continue;
1242 get_nfs_open_context(ctx);
1243 spin_unlock(&state->inode->i_lock);
1244 return ctx;
1245 }
1246 spin_unlock(&state->inode->i_lock);
1247 return ERR_PTR(-ENOENT);
1248}
1249
4a1c0893
TM		 1250static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1251 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1252{
1253 struct nfs4_opendata *opendata;
1254
4a1c0893
TM		 1255 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1256 NULL, claim, GFP_NOFS);
6f220ed5
TM		 1257 if (opendata == NULL)
1258 return ERR_PTR(-ENOMEM);
1259 opendata->state = state;
1260 atomic_inc(&state->count);
1261 return opendata;
1262}
1263
dc0b027d 1264static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1265{
2ced46c2 1266 struct nfs4_state *newstate;
864472e9
TM		 1267 int ret;
1268
dc0b027d
TM		 1269 opendata->o_arg.open_flags = 0;
1270 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1271 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1272 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1273 nfs4_init_opendata_res(opendata);
b257957e 1274 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1275 if (ret != 0)
1276 return ret;
2ced46c2 1277 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1278 if (IS_ERR(newstate))
1279 return PTR_ERR(newstate);
643168c2 1280 nfs4_close_state(newstate, fmode);
2ced46c2 1281 *res = newstate;
864472e9
TM		 1282 return 0;
1283}
1284
1285static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1286{
864472e9 1287 struct nfs4_state *newstate;
864472e9
TM		 1288 int ret;
1289
1290 /* memory barrier prior to reading state->n_* */
2ced46c2 1291 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1292 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1293 smp_rmb();
1294 if (state->n_rdwr != 0) {
b0ed9dbc 1295 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1296 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1297 if (ret != 0)
1298 return ret;
2ced46c2
TM		 1299 if (newstate != state)
1300 return -ESTALE;
864472e9
TM		 1301 }
1302 if (state->n_wronly != 0) {
b0ed9dbc 1303 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1304 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1305 if (ret != 0)
1306 return ret;
2ced46c2
TM		 1307 if (newstate != state)
1308 return -ESTALE;
864472e9
TM		 1309 }
1310 if (state->n_rdonly != 0) {
b0ed9dbc 1311 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1312 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1313 if (ret != 0)
1314 return ret;
2ced46c2
TM		 1315 if (newstate != state)
1316 return -ESTALE;
864472e9 1317 }
1ac7e2fd
TM		 1318 /*
1319 * We may have performed cached opens for all three recoveries.
1320 * Check if we need to update the current stateid.
1321 */
1322 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1323 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1324 write_seqlock(&state->seqlock);
1ac7e2fd 1325 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1326 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1327 write_sequnlock(&state->seqlock);
1ac7e2fd 1328 }
864472e9
TM		 1329 return 0;
1330}
1331
1da177e4
LT		 1332/*
1333 * OPEN_RECLAIM:
1334 * reclaim state on the server after a reboot.
1da177e4 1335 */
539cd03a 1336static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1337{
1ac7e2fd 1338 struct nfs_delegation *delegation;
864472e9 1339 struct nfs4_opendata *opendata;
dc0b027d 1340 fmode_t delegation_type = 0;
1da177e4
LT		 1341 int status;
1342
4a1c0893
TM		 1343 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1344 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1345 if (IS_ERR(opendata))
1346 return PTR_ERR(opendata);
1ac7e2fd
TM		 1347 rcu_read_lock();
1348 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1349 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1350 delegation_type = delegation->type;
1ac7e2fd 1351 rcu_read_unlock();
864472e9
TM		 1352 opendata->o_arg.u.delegation_type = delegation_type;
1353 status = nfs4_open_recover(opendata, state);
c6d00e63 1354 nfs4_opendata_put(opendata);
1da177e4
LT		 1355 return status;
1356}
1357
539cd03a 1358static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1359{
1360 struct nfs_server *server = NFS_SERVER(state->inode);
1361 struct nfs4_exception exception = { };
1362 int err;
1363 do {
539cd03a 1364 err = _nfs4_do_open_reclaim(ctx, state);
49f9a0fa
TM		 1365 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1366 continue;
168667c4 1367 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1368 break;
1369 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1370 } while (exception.retry);
1371 return err;
1372}
1373
864472e9
TM		 1374static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1375{
1376 struct nfs_open_context *ctx;
1377 int ret;
1378
1379 ctx = nfs4_state_find_open_context(state);
1380 if (IS_ERR(ctx))
91876b13 1381 return -EAGAIN;
539cd03a 1382 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1383 put_nfs_open_context(ctx);
1384 return ret;
1385}
1386
db4f2e63 1387static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1388{
be76b5b6
TM		 1389 switch (err) {
1390 default:
1391 printk(KERN_ERR "NFS: %s: unhandled error "
1392 "%d.\n", __func__, err);
1393 case 0:
1394 case -ENOENT:
1395 case -ESTALE:
1396 break;
1397 case -NFS4ERR_BADSESSION:
1398 case -NFS4ERR_BADSLOT:
1399 case -NFS4ERR_BAD_HIGH_SLOT:
1400 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1401 case -NFS4ERR_DEADSESSION:
1402 set_bit(NFS_DELEGATED_STATE, &state->flags);
1403 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1404 return -EAGAIN;
1405 case -NFS4ERR_STALE_CLIENTID:
1406 case -NFS4ERR_STALE_STATEID:
1407 set_bit(NFS_DELEGATED_STATE, &state->flags);
1408 case -NFS4ERR_EXPIRED:
1409 /* Don't recall a delegation if it was lost */
1410 nfs4_schedule_lease_recovery(server->nfs_client);
1411 return -EAGAIN;
1412 case -NFS4ERR_DELEG_REVOKED:
1413 case -NFS4ERR_ADMIN_REVOKED:
1414 case -NFS4ERR_BAD_STATEID:
db4f2e63 1415 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1416 nfs_inode_find_state_and_recover(state->inode,
1417 stateid);
1418 nfs4_schedule_stateid_recovery(server, state);
270e234c 1419 return -EAGAIN;
be76b5b6
TM		 1420 case -NFS4ERR_DELAY:
1421 case -NFS4ERR_GRACE:
1422 set_bit(NFS_DELEGATED_STATE, &state->flags);
1423 ssleep(1);
1424 return -EAGAIN;
db4f2e63
TM		 1425 case -ENOMEM:
1426 case -NFS4ERR_DENIED:
1427 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1428 return 0;
be76b5b6 1429 }
1da177e4
LT		 1430 return err;
1431}
1432
db4f2e63
TM		 1433int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1434{
1435 struct nfs_server *server = NFS_SERVER(state->inode);
1436 struct nfs4_opendata *opendata;
1437 int err;
1438
1439 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1440 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1441 if (IS_ERR(opendata))
1442 return PTR_ERR(opendata);
1443 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1444 err = nfs4_open_recover(opendata, state);
1445 nfs4_opendata_put(opendata);
1446 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1447}
1448
cdd4e68b
TM		 1449static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1450{
1451 struct nfs4_opendata *data = calldata;
1452
1453 data->rpc_status = task->tk_status;
26e976a8 1454 if (data->rpc_status == 0) {
f597c537 1455 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1456 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1457 renew_lease(data->o_res.server, data->timestamp);
3e309914 1458 data->rpc_done = 1;
26e976a8 1459 }
cdd4e68b
TM		 1460}
1461
1462static void nfs4_open_confirm_release(void *calldata)
1463{
1464 struct nfs4_opendata *data = calldata;
1465 struct nfs4_state *state = NULL;
1466
1467 /* If this request hasn't been cancelled, do nothing */
1468 if (data->cancelled == 0)
1469 goto out_free;
1470 /* In case of error, no cleanup! */
3e309914 1471 if (!data->rpc_done)
cdd4e68b 1472 goto out_free;
cdd4e68b 1473 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1474 if (!IS_ERR(state))
643168c2 1475 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1476out_free:
c6d00e63 1477 nfs4_opendata_put(data);
cdd4e68b
TM		 1478}
1479
1480static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1481 .rpc_call_done = nfs4_open_confirm_done,
1482 .rpc_release = nfs4_open_confirm_release,
1483};
1484
1485/*
1486 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1487 */
1488static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1489{
1490 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1491 struct rpc_task *task;
5138fde0
TM		 1492 struct rpc_message msg = {
1493 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1494 .rpc_argp = &data->c_arg,
1495 .rpc_resp = &data->c_res,
1496 .rpc_cred = data->owner->so_cred,
1497 };
c970aa85
TM		 1498 struct rpc_task_setup task_setup_data = {
1499 .rpc_client = server->client,
5138fde0 1500 .rpc_message = &msg,
c970aa85
TM		 1501 .callback_ops = &nfs4_open_confirm_ops,
1502 .callback_data = data,
101070ca 1503 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1504 .flags = RPC_TASK_ASYNC,
1505 };
1da177e4
LT		 1506 int status;
1507
c6d00e63 1508 kref_get(&data->kref);
3e309914
TM		 1509 data->rpc_done = 0;
1510 data->rpc_status = 0;
5138fde0 1511 data->timestamp = jiffies;
c970aa85 1512 task = rpc_run_task(&task_setup_data);
7a1218a2 1513 if (IS_ERR(task))
cdd4e68b 1514 return PTR_ERR(task);
cdd4e68b
TM		 1515 status = nfs4_wait_for_completion_rpc_task(task);
1516 if (status != 0) {
1517 data->cancelled = 1;
1518 smp_wmb();
1519 } else
1520 status = data->rpc_status;
e6b3c4db 1521 rpc_put_task(task);
1da177e4
LT		 1522 return status;
1523}
1524
24ac23ab 1525static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1526{
24ac23ab
TM		 1527 struct nfs4_opendata *data = calldata;
1528 struct nfs4_state_owner *sp = data->owner;
549b19cc 1529 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1530
24ac23ab 1531 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1532 goto out_wait;
aac00a8d
TM		 1533 /*
1534 * Check if we still need to send an OPEN call, or if we can use
1535 * a delegation instead.
1536 */
1537 if (data->state != NULL) {
1538 struct nfs_delegation *delegation;
1539
dc0b027d 1540 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1541 goto out_no_action;
aac00a8d
TM		 1542 rcu_read_lock();
1543 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1544 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1545 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1546 can_open_delegated(delegation, data->o_arg.fmode))
1547 goto unlock_no_action;
aac00a8d
TM		 1548 rcu_read_unlock();
1549 }
95b72eb0 1550 /* Update client id. */
549b19cc 1551 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1552 switch (data->o_arg.claim) {
1553 case NFS4_OPEN_CLAIM_PREVIOUS:
1554 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1555 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1556 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1557 case NFS4_OPEN_CLAIM_FH:
1558 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1559 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1560 }
26e976a8 1561 data->timestamp = jiffies;
035168ab 1562 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1563 &data->o_arg.seq_args,
2240a9e2
TM		 1564 &data->o_res.seq_res,
1565 task) != 0)
1566 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1567
1568 /* Set the create mode (note dependency on the session type) */
1569 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1570 if (data->o_arg.open_flags & O_EXCL) {
1571 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1572 if (nfs4_has_persistent_session(clp))
1573 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1574 else if (clp->cl_mvops->minor_version > 0)
1575 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1576 }
6ee41268 1577 return;
652f89f6
TM		 1578unlock_no_action:
1579 rcu_read_unlock();
6ee41268
TM		 1580out_no_action:
1581 task->tk_action = NULL;
c8da19b9 1582out_wait:
b75ad4cd 1583 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1584}
1585
24ac23ab
TM		 1586static void nfs4_open_done(struct rpc_task *task, void *calldata)
1587{
1588 struct nfs4_opendata *data = calldata;
1da177e4 1589
24ac23ab 1590 data->rpc_status = task->tk_status;
d898528c 1591
14516c3a
TM		 1592 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1593 return;
d898528c 1594
24ac23ab 1595 if (task->tk_status == 0) {
807d66d8
TM		 1596 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1597 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1598 case S_IFREG:
1599 break;
1600 case S_IFLNK:
24ac23ab 1601 data->rpc_status = -ELOOP;
6f926b5b
TM		 1602 break;
1603 case S_IFDIR:
24ac23ab 1604 data->rpc_status = -EISDIR;
6f926b5b
TM		 1605 break;
1606 default:
24ac23ab 1607 data->rpc_status = -ENOTDIR;
807d66d8 1608 }
6f926b5b 1609 }
26e976a8 1610 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1611 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1612 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1613 }
3e309914 1614 data->rpc_done = 1;
24ac23ab 1615}
6f926b5b 1616
24ac23ab
TM		 1617static void nfs4_open_release(void *calldata)
1618{
1619 struct nfs4_opendata *data = calldata;
1620 struct nfs4_state *state = NULL;
1621
1622 /* If this request hasn't been cancelled, do nothing */
1623 if (data->cancelled == 0)
1624 goto out_free;
1625 /* In case of error, no cleanup! */
3e309914 1626 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1627 goto out_free;
1628 /* In case we need an open_confirm, no cleanup! */
1629 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1630 goto out_free;
24ac23ab 1631 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1632 if (!IS_ERR(state))
643168c2 1633 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1634out_free:
c6d00e63 1635 nfs4_opendata_put(data);
24ac23ab
TM		 1636}
1637
1638static const struct rpc_call_ops nfs4_open_ops = {
1639 .rpc_call_prepare = nfs4_open_prepare,
1640 .rpc_call_done = nfs4_open_done,
1641 .rpc_release = nfs4_open_release,
1642};
1643
b257957e 1644static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1645{
1646 struct inode *dir = data->dir->d_inode;
1647 struct nfs_server *server = NFS_SERVER(dir);
1648 struct nfs_openargs *o_arg = &data->o_arg;
1649 struct nfs_openres *o_res = &data->o_res;
1650 struct rpc_task *task;
5138fde0
TM		 1651 struct rpc_message msg = {
1652 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1653 .rpc_argp = o_arg,
1654 .rpc_resp = o_res,
1655 .rpc_cred = data->owner->so_cred,
1656 };
c970aa85
TM		 1657 struct rpc_task_setup task_setup_data = {
1658 .rpc_client = server->client,
5138fde0 1659 .rpc_message = &msg,
c970aa85
TM		 1660 .callback_ops = &nfs4_open_ops,
1661 .callback_data = data,
101070ca 1662 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1663 .flags = RPC_TASK_ASYNC,
1664 };
24ac23ab
TM		 1665 int status;
1666
9d12b216 1667 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1668 kref_get(&data->kref);
3e309914
TM		 1669 data->rpc_done = 0;
1670 data->rpc_status = 0;
2ced46c2 1671 data->cancelled = 0;
bdeca1b7
TM		 1672 data->is_recover = 0;
1673 if (isrecover) {
8fe72bac 1674 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1675 data->is_recover = 1;
1676 }
c970aa85 1677 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1678 if (IS_ERR(task))
1679 return PTR_ERR(task);
1680 status = nfs4_wait_for_completion_rpc_task(task);
1681 if (status != 0) {
1682 data->cancelled = 1;
1683 smp_wmb();
1684 } else
1685 status = data->rpc_status;
1686 rpc_put_task(task);
1687
1688 return status;
1689}
1690
1691static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1692{
1693 struct inode *dir = data->dir->d_inode;
1694 struct nfs_openres *o_res = &data->o_res;
1695 int status;
1696
1697 status = nfs4_run_open_task(data, 1);
1698 if (status != 0 || !data->rpc_done)
1699 return status;
1700
6926afd1
TM		 1701 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1702
b257957e
AB		 1703 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1704 status = _nfs4_proc_open_confirm(data);
1705 if (status != 0)
1706 return status;
1707 }
1708
1709 return status;
1710}
1711
6168f62c
WAA		 1712static int nfs4_opendata_access(struct rpc_cred *cred,
1713 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1714 struct nfs4_state *state, fmode_t fmode,
1715 int openflags)
6168f62c
WAA		 1716{
1717 struct nfs_access_entry cache;
1718 u32 mask;
1719
1720 /* access call failed or for some reason the server doesn't
1721 * support any access modes -- defer access call until later */
1722 if (opendata->o_res.access_supported == 0)
1723 return 0;
1724
1725 mask = 0;
bbd3a8ee 1726 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1727 * write mode bits, but POSIX allows the creating process to write.
1728 * use openflags to check for exec, because fmode won't
1729 * always have FMODE_EXEC set when file open for exec. */
1730 if (openflags & __FMODE_EXEC) {
1731 /* ONLY check for exec rights */
1732 mask = MAY_EXEC;
1733 } else if (fmode & FMODE_READ)
1734 mask = MAY_READ;
6168f62c
WAA		 1735
1736 cache.cred = cred;
1737 cache.jiffies = jiffies;
1738 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1739 nfs_access_add_cache(state->inode, &cache);
1740
bbd3a8ee 1741 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1742 return 0;
1743
1744 /* even though OPEN succeeded, access is denied. Close the file */
1745 nfs4_close_state(state, fmode);
998f40b5 1746 return -EACCES;
6168f62c
WAA		 1747}
1748
b257957e
AB		 1749/*
1750 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1751 */
1752static int _nfs4_proc_open(struct nfs4_opendata *data)
1753{
1754 struct inode *dir = data->dir->d_inode;
1755 struct nfs_server *server = NFS_SERVER(dir);
1756 struct nfs_openargs *o_arg = &data->o_arg;
1757 struct nfs_openres *o_res = &data->o_res;
1758 int status;
1759
1760 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1761 if (!data->rpc_done)
1762 return status;
1763 if (status != 0) {
1764 if (status == -NFS4ERR_BADNAME &&
1765 !(o_arg->open_flags & O_CREAT))
1766 return -ENOENT;
24ac23ab 1767 return status;
08ef7bd3 1768 }
24ac23ab 1769
6926afd1
TM		 1770 nfs_fattr_map_and_free_names(server, &data->f_attr);
1771
90ff0c54 1772 if (o_arg->open_flags & O_CREAT)
56ae19f3 1773 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1774 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1775 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1776 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1777 status = _nfs4_proc_open_confirm(data);
1da177e4 1778 if (status != 0)
24ac23ab 1779 return status;
1da177e4
LT		 1780 }
1781 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1782 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1783 return 0;
1da177e4
LT		 1784}
1785
d83217c1
AA		 1786static int nfs4_recover_expired_lease(struct nfs_server *server)
1787{
1788 return nfs4_client_recover_expired_lease(server->nfs_client);
1789}
1790
1da177e4
LT		 1791/*
1792 * OPEN_EXPIRED:
1793 * reclaim state on the server after a network partition.
1794 * Assumes caller holds the appropriate lock
1795 */
539cd03a 1796static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1797{
e56e0b78 1798 struct nfs4_opendata *opendata;
864472e9 1799 int ret;
1da177e4 1800
4a1c0893 1801 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1802 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1803 if (IS_ERR(opendata))
1804 return PTR_ERR(opendata);
864472e9 1805 ret = nfs4_open_recover(opendata, state);
35d05778 1806 if (ret == -ESTALE)
3d4ff43d 1807 d_drop(ctx->dentry);
c6d00e63 1808 nfs4_opendata_put(opendata);
864472e9 1809 return ret;
1da177e4
LT		 1810}
1811
a9ed2e25 1812static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1813{
539cd03a 1814 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1815 struct nfs4_exception exception = { };
1816 int err;
1817
1818 do {
539cd03a 1819 err = _nfs4_open_expired(ctx, state);
49f9a0fa
TM		 1820 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1821 continue;
a9ed2e25
TM		 1822 switch (err) {
1823 default:
1824 goto out;
1825 case -NFS4ERR_GRACE:
1826 case -NFS4ERR_DELAY:
1827 nfs4_handle_exception(server, err, &exception);
1828 err = 0;
1829 }
202b50dc 1830 } while (exception.retry);
a9ed2e25 1831out:
202b50dc
TM		 1832 return err;
1833}
1834
1da177e4
LT		 1835static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1836{
1da177e4 1837 struct nfs_open_context *ctx;
864472e9 1838 int ret;
1da177e4 1839
864472e9
TM		 1840 ctx = nfs4_state_find_open_context(state);
1841 if (IS_ERR(ctx))
91876b13 1842 return -EAGAIN;
539cd03a 1843 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1844 put_nfs_open_context(ctx);
1845 return ret;
1da177e4
LT		 1846}
1847
361eeee7
TM		 1848static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
1849{
1850 nfs_remove_bad_delegation(state->inode);
1851 write_seqlock(&state->seqlock);
1852 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1853 write_sequnlock(&state->seqlock);
1854 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1855}
1856
1857static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
1858{
1859 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
1860 nfs_finish_clear_delegation_stateid(state);
1861}
1862
1863static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1864{
1865 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
1866 nfs40_clear_delegation_stateid(state);
1867 return nfs4_open_expired(sp, state);
1868}
1869
f062eb6c 1870#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1871static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1872{
f062eb6c 1873 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1874 nfs4_stateid *stateid = &state->stateid;
1875 int status;
1876
1877 /* If a state reset has been done, test_stateid is unneeded */
1878 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1879 return;
1880
1881 status = nfs41_test_stateid(server, stateid);
1882 if (status != NFS_OK) {
1883 /* Free the stateid unless the server explicitly
1884 * informs us the stateid is unrecognized. */
1885 if (status != -NFS4ERR_BAD_STATEID)
1886 nfs41_free_stateid(server, stateid);
6938867e 1887 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1888
6938867e
BS		 1889 write_seqlock(&state->seqlock);
1890 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1891 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1892 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1893 }
1894}
1895
1896/**
1897 * nfs41_check_open_stateid - possibly free an open stateid
1898 *
1899 * @state: NFSv4 state for an inode
1900 *
1901 * Returns NFS_OK if recovery for this stateid is now finished.
1902 * Otherwise a negative NFS4ERR value is returned.
1903 */
1904static int nfs41_check_open_stateid(struct nfs4_state *state)
1905{
1906 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1907 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1908 int status;
1909
1910 /* If a state reset has been done, test_stateid is unneeded */
1911 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1912 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1913 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1914 return -NFS4ERR_BAD_STATEID;
1915
1916 status = nfs41_test_stateid(server, stateid);
1917 if (status != NFS_OK) {
1918 /* Free the stateid unless the server explicitly
1919 * informs us the stateid is unrecognized. */
1920 if (status != -NFS4ERR_BAD_STATEID)
1921 nfs41_free_stateid(server, stateid);
1922
1923 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1924 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1925 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 1926 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 1927 }
1928 return status;
1929}
1930
1931static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1932{
eb64cf96 1933 int status;
b01dd1d8 1934
3e60ffdd
CL		 1935 nfs41_clear_delegation_stateid(state);
1936 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1937 if (status != NFS_OK)
1938 status = nfs4_open_expired(sp, state);
1939 return status;
f062eb6c
BS		 1940}
1941#endif
1942
aa53ed54
JL		 1943/*
1944 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1945 * fields corresponding to attributes that were used to store the verifier.
1946 * Make sure we clobber those fields in the later setattr call
1947 */
1948static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1949{
1950 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1951 !(sattr->ia_valid & ATTR_ATIME_SET))
1952 sattr->ia_valid |= ATTR_ATIME;
1953
1954 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1955 !(sattr->ia_valid & ATTR_MTIME_SET))
1956 sattr->ia_valid |= ATTR_MTIME;
1957}
1958
c21443c2
TM		 1959static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1960 fmode_t fmode,
1961 int flags,
1962 struct nfs4_state **res)
1963{
1964 struct nfs4_state_owner *sp = opendata->owner;
1965 struct nfs_server *server = sp->so_server;
1966 struct nfs4_state *state;
1967 unsigned int seq;
1968 int ret;
1969
1970 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1971
1972 ret = _nfs4_proc_open(opendata);
1973 if (ret != 0)
1974 goto out;
1975
1976 state = nfs4_opendata_to_nfs4_state(opendata);
1977 ret = PTR_ERR(state);
1978 if (IS_ERR(state))
1979 goto out;
1980 if (server->caps & NFS_CAP_POSIX_LOCK)
1981 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1982
1983 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1984 if (ret != 0)
1985 goto out;
1986
91876b13 1987 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
c21443c2 1988 nfs4_schedule_stateid_recovery(server, state);
c21443c2
TM		 1989 *res = state;
1990out:
1991 return ret;
1992}
1993
1da177e4 1994/*
24ac23ab 1995 * Returns a referenced nfs4_state
1da177e4 1996 */
82be417a
AA		 1997static int _nfs4_do_open(struct inode *dir,
1998 struct dentry *dentry,
1999 fmode_t fmode,
2000 int flags,
2001 struct iattr *sattr,
2002 struct rpc_cred *cred,
2003 struct nfs4_state **res,
2004 struct nfs4_threshold **ctx_th)
1da177e4
LT		 2005{
2006 struct nfs4_state_owner *sp;
2007 struct nfs4_state *state = NULL;
2008 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2009 struct nfs4_opendata *opendata;
49f9a0fa 2010 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
aac00a8d 2011 int status;
1da177e4
LT		 2012
2013 /* Protect against reboot recovery conflicts */
1da177e4 2014 status = -ENOMEM;
d1e284d5
TM		 2015 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2016 if (sp == NULL) {
1da177e4
LT		 2017 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2018 goto out_err;
2019 }
58d9714a
TM		 2020 status = nfs4_recover_expired_lease(server);
2021 if (status != 0)
b4454fe1 2022 goto err_put_state_owner;
82a2c1b7
AV		 2023 if (dentry->d_inode != NULL)
2024 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2025 status = -ENOMEM;
49f9a0fa
TM		 2026 if (dentry->d_inode)
2027 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2028 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
49f9a0fa 2029 claim, GFP_KERNEL);
e56e0b78 2030 if (opendata == NULL)
95d35cb4 2031 goto err_put_state_owner;
1da177e4 2032
82be417a
AA		 2033 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2034 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2035 if (!opendata->f_attr.mdsthreshold)
2036 goto err_opendata_put;
1549210f 2037 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2038 }
82a2c1b7
AV		 2039 if (dentry->d_inode != NULL)
2040 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2041
c21443c2 2042 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
6168f62c
WAA		 2043 if (status != 0)
2044 goto err_opendata_put;
2045
9520ac79 2046 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2047 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2048 nfs4_exclusive_attrset(opendata, sattr);
2049
2050 nfs_fattr_init(opendata->o_res.f_attr);
2051 status = nfs4_do_setattr(state->inode, cred,
2052 opendata->o_res.f_attr, sattr,
2053 state);
2054 if (status == 0)
2055 nfs_setattr_update_inode(state->inode, sattr);
2056 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2057 }
82be417a
AA		 2058
2059 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2060 *ctx_th = opendata->f_attr.mdsthreshold;
2061 else
2062 kfree(opendata->f_attr.mdsthreshold);
2063 opendata->f_attr.mdsthreshold = NULL;
2064
c6d00e63 2065 nfs4_opendata_put(opendata);
1da177e4 2066 nfs4_put_state_owner(sp);
1da177e4
LT		 2067 *res = state;
2068 return 0;
c6d00e63 2069err_opendata_put:
82be417a 2070 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2071 nfs4_opendata_put(opendata);
e56e0b78
TM		 2072err_put_state_owner:
2073 nfs4_put_state_owner(sp);
1da177e4 2074out_err:
1da177e4
LT		 2075 *res = NULL;
2076 return status;
2077}
2078
2079
82be417a
AA		 2080static struct nfs4_state *nfs4_do_open(struct inode *dir,
2081 struct dentry *dentry,
2082 fmode_t fmode,
2083 int flags,
2084 struct iattr *sattr,
2085 struct rpc_cred *cred,
2086 struct nfs4_threshold **ctx_th)
1da177e4 2087{
49f9a0fa 2088 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2089 struct nfs4_exception exception = { };
2090 struct nfs4_state *res;
2091 int status;
2092
6168f62c 2093 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 2094 do {
82be417a
AA		 2095 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
2096 &res, ctx_th);
1da177e4
LT		 2097 if (status == 0)
2098 break;
2099 /* NOTE: BAD_SEQID means the server and client disagree about the
2100 * book-keeping w.r.t. state-changing operations
2101 * (OPEN/CLOSE/LOCK/LOCKU...)
2102 * It is actually a sign of a bug on the client or on the server.
2103 *
2104 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2105 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2106 * have unhashed the old state_owner for us, and that we can
2107 * therefore safely retry using a new one. We should still warn
2108 * the user though...
2109 */
2110 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2111 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2112 " returned a bad sequence-id error!\n",
2113 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2114 exception.retry = 1;
2115 continue;
2116 }
550f5747
TM		 2117 /*
2118 * BAD_STATEID on OPEN means that the server cancelled our
2119 * state before it received the OPEN_CONFIRM.
2120 * Recover by retrying the request as per the discussion
2121 * on Page 181 of RFC3530.
2122 */
2123 if (status == -NFS4ERR_BAD_STATEID) {
2124 exception.retry = 1;
2125 continue;
2126 }
aac00a8d
TM		 2127 if (status == -EAGAIN) {
2128 /* We must have found a delegation */
2129 exception.retry = 1;
2130 continue;
2131 }
49f9a0fa
TM		 2132 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2133 continue;
2134 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2135 status, &exception));
2136 } while (exception.retry);
2137 return res;
2138}
2139
659bfcd6
TM		 2140static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2141 struct nfs_fattr *fattr, struct iattr *sattr,
2142 struct nfs4_state *state)
1da177e4 2143{
3e4f6290 2144 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2145 struct nfs_setattrargs arg = {
3e4f6290 2146 .fh = NFS_FH(inode),
1da177e4
LT		 2147 .iap = sattr,
2148 .server = server,
2149 .bitmask = server->attr_bitmask,
2150 };
2151 struct nfs_setattrres res = {
2152 .fattr = fattr,
2153 .server = server,
2154 };
2155 struct rpc_message msg = {
659bfcd6
TM		 2156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2157 .rpc_argp = &arg,
2158 .rpc_resp = &res,
2159 .rpc_cred = cred,
1da177e4 2160 };
26e976a8 2161 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2162 fmode_t fmode;
2163 bool truncate;
65e4308d 2164 int status;
1da177e4 2165
0e574af1 2166 nfs_fattr_init(fattr);
1da177e4 2167
ee3ae84e
TM		 2168 /* Servers should only apply open mode checks for file size changes */
2169 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2170 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2171
2172 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2173 /* Use that stateid */
2174 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2175 struct nfs_lockowner lockowner = {
2176 .l_owner = current->files,
2177 .l_pid = current->tgid,
2178 };
4fc8796d 2179 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2180 &lockowner);
08e9eac4 2181 } else
f597c537 2182 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2183
7c513058 2184 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2185 if (status == 0 && state != NULL)
2186 renew_lease(server, timestamp);
65e4308d 2187 return status;
1da177e4
LT		 2188}
2189
659bfcd6
TM		 2190static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2191 struct nfs_fattr *fattr, struct iattr *sattr,
2192 struct nfs4_state *state)
1da177e4 2193{
3e4f6290 2194 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2195 struct nfs4_exception exception = {
2196 .state = state,
3114ea7a 2197 .inode = inode,
a1d0b5ee 2198 };
1da177e4
LT		 2199 int err;
2200 do {
451146be
TM		 2201 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2202 switch (err) {
2203 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2204 if (!(sattr->ia_valid & ATTR_SIZE)) {
2205 pr_warn_once("NFSv4: server %s is incorrectly "
2206 "applying open mode checks to "
2207 "a SETATTR that is not "
2208 "changing file size.\n",
2209 server->nfs_client->cl_hostname);
2210 }
451146be
TM		 2211 if (state && !(state->state & FMODE_WRITE)) {
2212 err = -EBADF;
2213 if (sattr->ia_valid & ATTR_OPEN)
2214 err = -EACCES;
2215 goto out;
2216 }
2217 }
2218 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2219 } while (exception.retry);
451146be 2220out:
1da177e4
LT		 2221 return err;
2222}
2223
2224struct nfs4_closedata {
2225 struct inode *inode;
2226 struct nfs4_state *state;
2227 struct nfs_closeargs arg;
2228 struct nfs_closeres res;
516a6af6 2229 struct nfs_fattr fattr;
26e976a8 2230 unsigned long timestamp;
f7e8917a
FI		 2231 bool roc;
2232 u32 roc_barrier;
1da177e4
LT		 2233};
2234
963d8fe5 2235static void nfs4_free_closedata(void *data)
9512135d 2236{
963d8fe5
TM		 2237 struct nfs4_closedata *calldata = data;
2238 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2239 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2240
f7e8917a
FI		 2241 if (calldata->roc)
2242 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2243 nfs4_put_open_state(calldata->state);
2244 nfs_free_seqid(calldata->arg.seqid);
9512135d 2245 nfs4_put_state_owner(sp);
322b2b90 2246 nfs_sb_deactive(sb);
9512135d
TM		 2247 kfree(calldata);
2248}
2249
88069f77
TM		 2250static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2251 fmode_t fmode)
2252{
2253 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2254 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2255 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2256 case FMODE_WRITE:
88069f77 2257 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2258 break;
2259 case FMODE_READ:
88069f77 2260 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2261 break;
2262 case 0:
2263 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2264 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2265 clear_bit(NFS_OPEN_STATE, &state->flags);
2266 }
88069f77
TM		 2267 spin_unlock(&state->owner->so_lock);
2268}
2269
963d8fe5 2270static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2271{
963d8fe5 2272 struct nfs4_closedata *calldata = data;
1da177e4 2273 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2274 struct nfs_server *server = NFS_SERVER(calldata->inode);
2275
a3ca5651 2276 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2277 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2278 return;
1da177e4
LT		 2279 /* hmm. we are done with the inode, and in the process of freeing
2280 * the state_owner. we keep this around to process errors
2281 */
1da177e4
LT		 2282 switch (task->tk_status) {
2283 case 0:
f7e8917a
FI		 2284 if (calldata->roc)
2285 pnfs_roc_set_barrier(state->inode,
2286 calldata->roc_barrier);
45328c35 2287 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2288 renew_lease(server, calldata->timestamp);
88069f77
TM		 2289 nfs4_close_clear_stateid_flags(state,
2290 calldata->arg.fmode);
1da177e4
LT		 2291 break;
2292 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2293 case -NFS4ERR_OLD_STATEID:
2294 case -NFS4ERR_BAD_STATEID:
1da177e4 2295 case -NFS4ERR_EXPIRED:
dc0b027d 2296 if (calldata->arg.fmode == 0)
9e33bed5 2297 break;
1da177e4 2298 default:
72211dbe
TM		 2299 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2300 rpc_restart_call_prepare(task);
1da177e4 2301 }
72211dbe 2302 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2303 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2304 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2305}
2306
4ce70ada 2307static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2308{
4ce70ada 2309 struct nfs4_closedata *calldata = data;
9512135d 2310 struct nfs4_state *state = calldata->state;
7fdab069 2311 struct inode *inode = calldata->inode;
569ae35a 2312 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2313 int call_close = 0;
9512135d 2314
a3ca5651 2315 dprintk("%s: begin!\n", __func__);
963d8fe5 2316 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2317 goto out_wait;
003707c7 2318
88069f77 2319 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2320 spin_lock(&state->owner->so_lock);
569ae35a
TM		 2321 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2322 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2323 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
003707c7 2324 /* Calculate the change in open mode */
a6ac6009 2325 calldata->arg.fmode = 0;
e7616923 2326 if (state->n_rdwr == 0) {
a6ac6009
TM		 2327 if (state->n_rdonly == 0)
2328 call_close |= is_rdonly;
2329 else if (is_rdonly)
2330 calldata->arg.fmode |= FMODE_READ;
2331 if (state->n_wronly == 0)
2332 call_close |= is_wronly;
2333 else if (is_wronly)
2334 calldata->arg.fmode |= FMODE_WRITE;
1e766c17
TM		 2335 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
2336 call_close |= is_rdwr;
a6ac6009
TM		 2337 } else if (is_rdwr)
2338 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2339
5d422301
TM		 2340 if (!nfs4_valid_open_stateid(state))
2341 call_close = 0;
4cecb76f 2342 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2343
2344 if (!call_close) {
963d8fe5 2345 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2346 goto out_no_action;
9512135d 2347 }
88069f77 2348
f7e8917a 2349 if (calldata->arg.fmode == 0) {
88069f77 2350 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2351 if (calldata->roc &&
b9536ad5
AA		 2352 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2353 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2354 goto out_wait;
b9536ad5 2355 }
f7e8917a 2356 }
88069f77 2357
516a6af6 2358 nfs_fattr_init(calldata->res.fattr);
26e976a8 2359 calldata->timestamp = jiffies;
7fdab069 2360 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2361 &calldata->arg.seq_args,
2362 &calldata->res.seq_res,
2240a9e2
TM		 2363 task) != 0)
2364 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2365 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2366 return;
2367out_no_action:
2368 task->tk_action = NULL;
2369out_wait:
2370 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2371}
2372
963d8fe5 2373static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2374 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2375 .rpc_call_done = nfs4_close_done,
2376 .rpc_release = nfs4_free_closedata,
2377};
2378
1da177e4
LT		 2379/*
2380 * It is possible for data to be read/written from a mem-mapped file
2381 * after the sys_close call (which hits the vfs layer as a flush).
2382 * This means that we can't safely call nfsv4 close on a file until
2383 * the inode is cleared. This in turn means that we are not good
2384 * NFSv4 citizens - we do not indicate to the server to update the file's
2385 * share state even when we are done with one of the three share
2386 * stateid's in the inode.
2387 *
2388 * NOTE: Caller must be holding the sp->so_owner semaphore!
2389 */
1f7977c1 2390int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2391{
4a35bd41 2392 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2393 struct nfs4_closedata *calldata;
b39e625b
TM		 2394 struct nfs4_state_owner *sp = state->owner;
2395 struct rpc_task *task;
5138fde0
TM		 2396 struct rpc_message msg = {
2397 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2398 .rpc_cred = state->owner->so_cred,
2399 };
c970aa85
TM		 2400 struct rpc_task_setup task_setup_data = {
2401 .rpc_client = server->client,
5138fde0 2402 .rpc_message = &msg,
c970aa85 2403 .callback_ops = &nfs4_close_ops,
101070ca 2404 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2405 .flags = RPC_TASK_ASYNC,
2406 };
9512135d 2407 int status = -ENOMEM;
1da177e4 2408
8535b2be 2409 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2410 if (calldata == NULL)
9512135d 2411 goto out;
9d12b216 2412 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2413 calldata->inode = state->inode;
1da177e4 2414 calldata->state = state;
4a35bd41 2415 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2416 calldata->arg.stateid = &state->open_stateid;
1da177e4 2417 /* Serialization for the sequence id */
8535b2be 2418 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2419 if (calldata->arg.seqid == NULL)
2420 goto out_free_calldata;
dc0b027d 2421 calldata->arg.fmode = 0;
a65318bf 2422 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2423 calldata->res.fattr = &calldata->fattr;
c1d51931 2424 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2425 calldata->res.server = server;
1f7977c1 2426 calldata->roc = pnfs_roc(state->inode);
643168c2 2427 nfs_sb_active(calldata->inode->i_sb);
9512135d 2428
1174dd1f
TM		 2429 msg.rpc_argp = &calldata->arg;
2430 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2431 task_setup_data.callback_data = calldata;
2432 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2433 if (IS_ERR(task))
2434 return PTR_ERR(task);
a49c3c77
TM		 2435 status = 0;
2436 if (wait)
2437 status = rpc_wait_for_completion_task(task);
b39e625b 2438 rpc_put_task(task);
a49c3c77 2439 return status;
9512135d
TM		 2440out_free_calldata:
2441 kfree(calldata);
2442out:
b39e625b
TM		 2443 nfs4_put_open_state(state);
2444 nfs4_put_state_owner(sp);
9512135d 2445 return status;
1da177e4
LT		 2446}
2447
2b484297 2448static struct inode *
cd9a1c0e 2449nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2450{
1da177e4 2451 struct nfs4_state *state;
1da177e4 2452
565277f6 2453 /* Protect against concurrent sillydeletes */
82be417a
AA		 2454 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2455 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2456 if (IS_ERR(state))
2457 return ERR_CAST(state);
cd9a1c0e 2458 ctx->state = state;
f46e0bd3 2459 return igrab(state->inode);
1da177e4
LT		 2460}
2461
1185a552 2462static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2463{
2464 if (ctx->state == NULL)
2465 return;
2466 if (is_sync)
643168c2 2467 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2468 else
643168c2 2469 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2470}
1da177e4
LT		 2471
2472static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2473{
43652ad5
BH		 2474 struct nfs4_server_caps_arg args = {
2475 .fhandle = fhandle,
2476 };
1da177e4
LT		 2477 struct nfs4_server_caps_res res = {};
2478 struct rpc_message msg = {
2479 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2480 .rpc_argp = &args,
1da177e4
LT		 2481 .rpc_resp = &res,
2482 };
2483 int status;
2484
7c513058 2485 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2486 if (status == 0) {
2487 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2488 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2489 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2490 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2491 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2492 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2493 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2494 server->caps |= NFS_CAP_ACLS;
2495 if (res.has_links != 0)
2496 server->caps |= NFS_CAP_HARDLINKS;
2497 if (res.has_symlinks != 0)
2498 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2499 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2500 server->caps |= NFS_CAP_FILEID;
2501 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2502 server->caps |= NFS_CAP_MODE;
2503 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2504 server->caps |= NFS_CAP_NLINK;
2505 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2506 server->caps |= NFS_CAP_OWNER;
2507 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2508 server->caps |= NFS_CAP_OWNER_GROUP;
2509 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2510 server->caps |= NFS_CAP_ATIME;
2511 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2512 server->caps |= NFS_CAP_CTIME;
2513 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2514 server->caps |= NFS_CAP_MTIME;
2515
a65318bf
TM		 2516 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2517 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2518 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2519 server->acl_bitmask = res.acl_bitmask;
264e6351 2520 server->fh_expire_type = res.fh_expire_type;
1da177e4 2521 }
cccef3b9 2522
1da177e4
LT		 2523 return status;
2524}
2525
55a97593 2526int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2527{
2528 struct nfs4_exception exception = { };
2529 int err;
2530 do {
2531 err = nfs4_handle_exception(server,
2532 _nfs4_server_capabilities(server, fhandle),
2533 &exception);
2534 } while (exception.retry);
2535 return err;
2536}
2537
2538static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2539 struct nfs_fsinfo *info)
2540{
1da177e4
LT		 2541 struct nfs4_lookup_root_arg args = {
2542 .bitmask = nfs4_fattr_bitmap,
2543 };
2544 struct nfs4_lookup_res res = {
2545 .server = server,
0e574af1 2546 .fattr = info->fattr,
1da177e4
LT		 2547 .fh = fhandle,
2548 };
2549 struct rpc_message msg = {
2550 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2551 .rpc_argp = &args,
2552 .rpc_resp = &res,
2553 };
008f55d0 2554
0e574af1 2555 nfs_fattr_init(info->fattr);
7c513058 2556 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2557}
2558
2559static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2560 struct nfs_fsinfo *info)
2561{
2562 struct nfs4_exception exception = { };
2563 int err;
2564 do {
fb8a5ba8
BS		 2565 err = _nfs4_lookup_root(server, fhandle, info);
2566 switch (err) {
2567 case 0:
2568 case -NFS4ERR_WRONGSEC:
05e9cfb4 2569 goto out;
fb8a5ba8
BS		 2570 default:
2571 err = nfs4_handle_exception(server, err, &exception);
2572 }
1da177e4 2573 } while (exception.retry);
05e9cfb4 2574out:
1da177e4
LT		 2575 return err;
2576}
2577
8f70e95f
BS		 2578static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2579 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2580{
2581 struct rpc_auth *auth;
2582 int ret;
2583
2584 auth = rpcauth_create(flavor, server->client);
e8d920c5 2585 if (IS_ERR(auth)) {
75bc8821 2586 ret = -EACCES;
8f70e95f
BS		 2587 goto out;
2588 }
2589 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2590out:
2591 return ret;
2592}
2593
9a744ba3
CL		 2594/*
2595 * Retry pseudoroot lookup with various security flavors. We do this when:
2596 *
2597 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2598 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2599 *
2600 * Returns zero on success, or a negative NFS4ERR value, or a
2601 * negative errno value.
2602 */
801a16dc 2603static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2604 struct nfs_fsinfo *info)
1da177e4 2605{
9a744ba3
CL		 2606 /* Per 3530bis 15.33.5 */
2607 static const rpc_authflavor_t flav_array[] = {
2608 RPC_AUTH_GSS_KRB5P,
2609 RPC_AUTH_GSS_KRB5I,
2610 RPC_AUTH_GSS_KRB5,
c4eafe11 2611 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2612 RPC_AUTH_NULL,
2613 };
2614 int status = -EPERM;
2615 size_t i;
6a1a1e34 2616
9a744ba3 2617 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2618 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2619 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2620 continue;
2621 break;
8f70e95f 2622 }
9a744ba3 2623
fb8a5ba8
BS		 2624 /*
2625 * -EACCESS could mean that the user doesn't have correct permissions
2626 * to access the mount. It could also mean that we tried to mount
2627 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2628 * existing mount programs don't handle -EACCES very well so it should
2629 * be mapped to -EPERM instead.
2630 */
2631 if (status == -EACCES)
2632 status = -EPERM;
801a16dc
BS		 2633 return status;
2634}
2635
2ed4b95b
CL		 2636static int nfs4_do_find_root_sec(struct nfs_server *server,
2637 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2638{
2639 int mv = server->nfs_client->cl_minorversion;
2640 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2641}
2642
2643/**
2644 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2645 * @server: initialized nfs_server handle
2646 * @fhandle: we fill in the pseudo-fs root file handle
2647 * @info: we fill in an FSINFO struct
2648 *
2649 * Returns zero on success, or a negative errno.
801a16dc 2650 */
3028eb2b
BS		 2651int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2652 struct nfs_fsinfo *info)
801a16dc 2653{
2ed4b95b
CL		 2654 int status;
2655
2656 status = nfs4_lookup_root(server, fhandle, info);
2657 if ((status == -NFS4ERR_WRONGSEC) &&
2658 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2659 status = nfs4_do_find_root_sec(server, fhandle, info);
2660
1da177e4
LT		 2661 if (status == 0)
2662 status = nfs4_server_capabilities(server, fhandle);
2663 if (status == 0)
2664 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2665
c12e87f4 2666 return nfs4_map_errors(status);
1da177e4
LT		 2667}
2668
bae36241
BS		 2669static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2670 struct nfs_fsinfo *info)
2671{
2672 int error;
2673 struct nfs_fattr *fattr = info->fattr;
2674
2675 error = nfs4_server_capabilities(server, mntfh);
2676 if (error < 0) {
2677 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2678 return error;
2679 }
2680
2681 error = nfs4_proc_getattr(server, mntfh, fattr);
2682 if (error < 0) {
2683 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2684 return error;
2685 }
2686
2687 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2688 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2689 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2690
2691 return error;
2692}
2693
6b97fd3d
MN		 2694/*
2695 * Get locations and (maybe) other attributes of a referral.
2696 * Note that we'll actually follow the referral later when
2697 * we detect fsid mismatch in inode revalidation
2698 */
f05d147f
BS		 2699static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2700 const struct qstr *name, struct nfs_fattr *fattr,
2701 struct nfs_fh *fhandle)
6b97fd3d
MN		 2702{
2703 int status = -ENOMEM;
2704 struct page *page = NULL;
2705 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2706
2707 page = alloc_page(GFP_KERNEL);
2708 if (page == NULL)
2709 goto out;
2710 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2711 if (locations == NULL)
2712 goto out;
2713
f05d147f 2714 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2715 if (status != 0)
2716 goto out;
2717 /* Make sure server returned a different fsid for the referral */
2718 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2719 dprintk("%s: server did not return a different fsid for"
2720 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2721 status = -EIO;
2722 goto out;
2723 }
533eb461
AA		 2724 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2725 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2726
533eb461 2727 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2728 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2729 memset(fhandle, 0, sizeof(struct nfs_fh));
2730out:
2731 if (page)
2732 __free_page(page);
5d7ca35a 2733 kfree(locations);
6b97fd3d
MN		 2734 return status;
2735}
2736
1da177e4
LT		 2737static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2738{
2739 struct nfs4_getattr_arg args = {
2740 .fh = fhandle,
2741 .bitmask = server->attr_bitmask,
2742 };
2743 struct nfs4_getattr_res res = {
2744 .fattr = fattr,
2745 .server = server,
2746 };
2747 struct rpc_message msg = {
2748 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2749 .rpc_argp = &args,
2750 .rpc_resp = &res,
2751 };
2752
0e574af1 2753 nfs_fattr_init(fattr);
7c513058 2754 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2755}
2756
2757static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2758{
2759 struct nfs4_exception exception = { };
2760 int err;
2761 do {
2762 err = nfs4_handle_exception(server,
2763 _nfs4_proc_getattr(server, fhandle, fattr),
2764 &exception);
2765 } while (exception.retry);
2766 return err;
2767}
2768
2769/*
2770 * The file is not closed if it is opened due to the a request to change
2771 * the size of the file. The open call will not be needed once the
2772 * VFS layer lookup-intents are implemented.
2773 *
2774 * Close is called when the inode is destroyed.
2775 * If we haven't opened the file for O_WRONLY, we
2776 * need to in the size_change case to obtain a stateid.
2777 *
2778 * Got race?
2779 * Because OPEN is always done by name in nfsv4, it is
2780 * possible that we opened a different file by the same
2781 * name. We can recognize this race condition, but we
2782 * can't do anything about it besides returning an error.
2783 *
2784 * This will be fixed with VFS changes (lookup-intent).
2785 */
2786static int
2787nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2788 struct iattr *sattr)
2789{
08e9eac4 2790 struct inode *inode = dentry->d_inode;
659bfcd6 2791 struct rpc_cred *cred = NULL;
d530838b 2792 struct nfs4_state *state = NULL;
1da177e4
LT		 2793 int status;
2794
8a1636c4 2795 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2796 pnfs_commit_and_return_layout(inode);
8a1636c4 2797
0e574af1 2798 nfs_fattr_init(fattr);
1da177e4 2799
2669940d
AA		 2800 /* Deal with open(O_TRUNC) */
2801 if (sattr->ia_valid & ATTR_OPEN)
2802 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2803
2804 /* Optimization: if the end result is no change, don't RPC */
2805 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2806 return 0;
2807
d530838b 2808 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2809 if (sattr->ia_valid & ATTR_FILE) {
2810 struct nfs_open_context *ctx;
2811
2812 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2813 if (ctx) {
2814 cred = ctx->cred;
2815 state = ctx->state;
2816 }
659bfcd6 2817 }
08e9eac4 2818
659bfcd6 2819 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2820 if (status == 0)
2821 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2822 return status;
2823}
2824
0c2e53f1
TM		 2825static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2826 const struct qstr *name, struct nfs_fh *fhandle,
2827 struct nfs_fattr *fattr)
2b3de441 2828{
0c2e53f1 2829 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2830 int status;
2831 struct nfs4_lookup_arg args = {
2832 .bitmask = server->attr_bitmask,
0c2e53f1 2833 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2834 .name = name,
2835 };
2836 struct nfs4_lookup_res res = {
2837 .server = server,
2838 .fattr = fattr,
2839 .fh = fhandle,
2840 };
2841 struct rpc_message msg = {
2842 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2843 .rpc_argp = &args,
2844 .rpc_resp = &res,
2845 };
2846
2847 nfs_fattr_init(fattr);
2848
1da177e4 2849 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2850 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2851 dprintk("NFS reply lookup: %d\n", status);
2852 return status;
2853}
2854
72de53ec 2855static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2856{
7ebb9315 2857 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2858 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2859 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2860 fattr->nlink = 2;
2861}
2862
72de53ec
BS		 2863static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2864 struct qstr *name, struct nfs_fh *fhandle,
2865 struct nfs_fattr *fattr)
1da177e4
LT		 2866{
2867 struct nfs4_exception exception = { };
72de53ec 2868 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2869 int err;
2870 do {
72de53ec
BS		 2871 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2872 switch (err) {
08ef7bd3 2873 case -NFS4ERR_BADNAME:
72de53ec
BS		 2874 err = -ENOENT;
2875 goto out;
0c2e53f1 2876 case -NFS4ERR_MOVED:
f05d147f 2877 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2878 goto out;
0c2e53f1 2879 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2880 err = -EPERM;
2881 if (client != *clnt)
2882 goto out;
2883
2884 client = nfs4_create_sec_client(client, dir, name);
2885 if (IS_ERR(client))
2886 return PTR_ERR(client);
2887
2888 exception.retry = 1;
2889 break;
2890 default:
2891 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2892 }
1da177e4 2893 } while (exception.retry);
72de53ec
BS		 2894
2895out:
2896 if (err == 0)
2897 *clnt = client;
2898 else if (client != *clnt)
2899 rpc_shutdown_client(client);
2900
1da177e4
LT		 2901 return err;
2902}
2903
80a16b21 2904static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2905 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2906{
2907 int status;
2908 struct rpc_clnt *client = NFS_CLIENT(dir);
2909
2910 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2911 if (client != NFS_CLIENT(dir)) {
2912 rpc_shutdown_client(client);
2913 nfs_fixup_secinfo_attributes(fattr);
2914 }
2915 return status;
2916}
2917
f05d147f
BS		 2918struct rpc_clnt *
2919nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2920 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2921{
2922 int status;
2923 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2924
2925 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2926 if (status < 0) {
2927 rpc_shutdown_client(client);
2928 return ERR_PTR(status);
2929 }
2930 return client;
2931}
2932
1da177e4
LT		 2933static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2934{
76b32999 2935 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2936 struct nfs4_accessargs args = {
2937 .fh = NFS_FH(inode),
a4980e78 2938 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2939 };
2940 struct nfs4_accessres res = {
2941 .server = server,
1da177e4 2942 };
1da177e4
LT		 2943 struct rpc_message msg = {
2944 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2945 .rpc_argp = &args,
2946 .rpc_resp = &res,
2947 .rpc_cred = entry->cred,
2948 };
2949 int mode = entry->mask;
2950 int status;
2951
2952 /*
2953 * Determine which access bits we want to ask for...
2954 */
2955 if (mode & MAY_READ)
2956 args.access |= NFS4_ACCESS_READ;
2957 if (S_ISDIR(inode->i_mode)) {
2958 if (mode & MAY_WRITE)
2959 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2960 if (mode & MAY_EXEC)
2961 args.access |= NFS4_ACCESS_LOOKUP;
2962 } else {
2963 if (mode & MAY_WRITE)
2964 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2965 if (mode & MAY_EXEC)
2966 args.access |= NFS4_ACCESS_EXECUTE;
2967 }
c407d41a
TM		 2968
2969 res.fattr = nfs_alloc_fattr();
2970 if (res.fattr == NULL)
2971 return -ENOMEM;
2972
7c513058 2973 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2974 if (!status) {
6168f62c 2975 nfs_access_set_mask(entry, res.access);
c407d41a 2976 nfs_refresh_inode(inode, res.fattr);
1da177e4 2977 }
c407d41a 2978 nfs_free_fattr(res.fattr);
1da177e4
LT		 2979 return status;
2980}
2981
2982static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2983{
2984 struct nfs4_exception exception = { };
2985 int err;
2986 do {
2987 err = nfs4_handle_exception(NFS_SERVER(inode),
2988 _nfs4_proc_access(inode, entry),
2989 &exception);
2990 } while (exception.retry);
2991 return err;
2992}
2993
2994/*
2995 * TODO: For the time being, we don't try to get any attributes
2996 * along with any of the zero-copy operations READ, READDIR,
2997 * READLINK, WRITE.
2998 *
2999 * In the case of the first three, we want to put the GETATTR
3000 * after the read-type operation -- this is because it is hard
3001 * to predict the length of a GETATTR response in v4, and thus
3002 * align the READ data correctly. This means that the GETATTR
3003 * may end up partially falling into the page cache, and we should
3004 * shift it into the 'tail' of the xdr_buf before processing.
3005 * To do this efficiently, we need to know the total length
3006 * of data received, which doesn't seem to be available outside
3007 * of the RPC layer.
3008 *
3009 * In the case of WRITE, we also want to put the GETATTR after
3010 * the operation -- in this case because we want to make sure
140150db 3011 * we get the post-operation mtime and size.
1da177e4
LT		 3012 *
3013 * Both of these changes to the XDR layer would in fact be quite
3014 * minor, but I decided to leave them for a subsequent patch.
3015 */
3016static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3017 unsigned int pgbase, unsigned int pglen)
3018{
3019 struct nfs4_readlink args = {
3020 .fh = NFS_FH(inode),
3021 .pgbase = pgbase,
3022 .pglen = pglen,
3023 .pages = &page,
3024 };
f50c7000 3025 struct nfs4_readlink_res res;
1da177e4
LT		 3026 struct rpc_message msg = {
3027 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3028 .rpc_argp = &args,
f50c7000 3029 .rpc_resp = &res,
1da177e4
LT		 3030 };
3031
7c513058 3032 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3033}
3034
3035static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3036 unsigned int pgbase, unsigned int pglen)
3037{
3038 struct nfs4_exception exception = { };
3039 int err;
3040 do {
3041 err = nfs4_handle_exception(NFS_SERVER(inode),
3042 _nfs4_proc_readlink(inode, page, pgbase, pglen),
3043 &exception);
3044 } while (exception.retry);
3045 return err;
3046}
3047
1da177e4 3048/*
8867fe58 3049 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3050 */
1da177e4
LT		 3051static int
3052nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3053 int flags)
1da177e4 3054{
8867fe58 3055 struct nfs_open_context *ctx;
1da177e4 3056 struct nfs4_state *state;
1da177e4
LT		 3057 int status = 0;
3058
8867fe58
MS		 3059 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3060 if (IS_ERR(ctx))
3061 return PTR_ERR(ctx);
3062
a8a5da99 3063 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 3064 state = nfs4_do_open(dir, dentry, ctx->mode,
3065 flags, sattr, ctx->cred,
3066 &ctx->mdsthreshold);
d4d9cdcb 3067 d_drop(dentry);
1da177e4
LT		 3068 if (IS_ERR(state)) {
3069 status = PTR_ERR(state);
c0204fd2 3070 goto out;
1da177e4 3071 }
d4d9cdcb 3072 d_add(dentry, igrab(state->inode));
d75340cc 3073 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 3074 ctx->state = state;
1da177e4 3075out:
8867fe58 3076 put_nfs_open_context(ctx);
1da177e4
LT		 3077 return status;
3078}
3079
3080static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3081{
16e42959 3082 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3083 struct nfs_removeargs args = {
1da177e4 3084 .fh = NFS_FH(dir),
26fe5750 3085 .name = *name,
16e42959 3086 };
4fdc17b2 3087 struct nfs_removeres res = {
16e42959 3088 .server = server,
1da177e4 3089 };
1da177e4 3090 struct rpc_message msg = {
4fdc17b2
TM		 3091 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3092 .rpc_argp = &args,
3093 .rpc_resp = &res,
1da177e4 3094 };
778d2817 3095 int status;
1da177e4 3096
7c513058 3097 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3098 if (status == 0)
16e42959 3099 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3100 return status;
3101}
3102
3103static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3104{
3105 struct nfs4_exception exception = { };
3106 int err;
3107 do {
3108 err = nfs4_handle_exception(NFS_SERVER(dir),
3109 _nfs4_proc_remove(dir, name),
3110 &exception);
3111 } while (exception.retry);
3112 return err;
3113}
3114
e4eff1a6 3115static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3116{
e4eff1a6
TM		 3117 struct nfs_server *server = NFS_SERVER(dir);
3118 struct nfs_removeargs *args = msg->rpc_argp;
3119 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3120
e4eff1a6 3121 res->server = server;
1da177e4 3122 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3123 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 3124}
3125
34e137cc
BS		 3126static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3127{
d9afbd1b
TM		 3128 nfs4_setup_sequence(NFS_SERVER(data->dir),
3129 &data->args.seq_args,
3130 &data->res.seq_res,
3131 task);
1da177e4
LT		 3132}
3133
e4eff1a6 3134static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3135{
e4eff1a6
TM		 3136 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3137
14516c3a
TM		 3138 if (!nfs4_sequence_done(task, &res->seq_res))
3139 return 0;
9e33bed5 3140 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3141 return 0;
3142 update_changeattr(dir, &res->cinfo);
e4eff1a6 3143 return 1;
1da177e4
LT		 3144}
3145
d3d4152a
JL		 3146static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3147{
3148 struct nfs_server *server = NFS_SERVER(dir);
3149 struct nfs_renameargs *arg = msg->rpc_argp;
3150 struct nfs_renameres *res = msg->rpc_resp;
3151
3152 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3153 res->server = server;
9d12b216 3154 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3155}
3156
c6bfa1a1
BS		 3157static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3158{
d9afbd1b
TM		 3159 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3160 &data->args.seq_args,
3161 &data->res.seq_res,
3162 task);
d3d4152a
JL		 3163}
3164
3165static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3166 struct inode *new_dir)
3167{
3168 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3169
3170 if (!nfs4_sequence_done(task, &res->seq_res))
3171 return 0;
3172 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3173 return 0;
3174
3175 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3176 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3177 return 1;
3178}
3179
1da177e4
LT		 3180static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3181 struct inode *new_dir, struct qstr *new_name)
3182{
6caf2c82 3183 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3184 struct nfs_renameargs arg = {
1da177e4
LT		 3185 .old_dir = NFS_FH(old_dir),
3186 .new_dir = NFS_FH(new_dir),
3187 .old_name = old_name,
3188 .new_name = new_name,
6caf2c82 3189 };
e8582a8b 3190 struct nfs_renameres res = {
6caf2c82 3191 .server = server,
1da177e4 3192 };
1da177e4
LT		 3193 struct rpc_message msg = {
3194 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3195 .rpc_argp = &arg,
3196 .rpc_resp = &res,
3197 };
011fff72 3198 int status = -ENOMEM;
1da177e4 3199
7c513058 3200 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3201 if (!status) {
3202 update_changeattr(old_dir, &res.old_cinfo);
3203 update_changeattr(new_dir, &res.new_cinfo);
3204 }
3205 return status;
3206}
3207
3208static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3209 struct inode *new_dir, struct qstr *new_name)
3210{
3211 struct nfs4_exception exception = { };
3212 int err;
3213 do {
3214 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3215 _nfs4_proc_rename(old_dir, old_name,
3216 new_dir, new_name),
3217 &exception);
3218 } while (exception.retry);
3219 return err;
3220}
3221
3222static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3223{
91ba2eee 3224 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3225 struct nfs4_link_arg arg = {
3226 .fh = NFS_FH(inode),
3227 .dir_fh = NFS_FH(dir),
3228 .name = name,
91ba2eee
TM		 3229 .bitmask = server->attr_bitmask,
3230 };
91ba2eee
TM		 3231 struct nfs4_link_res res = {
3232 .server = server,
1da177e4 3233 };
1da177e4
LT		 3234 struct rpc_message msg = {
3235 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3236 .rpc_argp = &arg,
91ba2eee 3237 .rpc_resp = &res,
1da177e4 3238 };
136f2627
TM		 3239 int status = -ENOMEM;
3240
3241 res.fattr = nfs_alloc_fattr();
778d2817 3242 if (res.fattr == NULL)
136f2627 3243 goto out;
1da177e4 3244
7c513058 3245 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3246 if (!status) {
3247 update_changeattr(dir, &res.cinfo);
73a3d07c 3248 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3249 }
136f2627 3250out:
136f2627 3251 nfs_free_fattr(res.fattr);
1da177e4
LT		 3252 return status;
3253}
3254
3255static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3256{
3257 struct nfs4_exception exception = { };
3258 int err;
3259 do {
3260 err = nfs4_handle_exception(NFS_SERVER(inode),
3261 _nfs4_proc_link(inode, dir, name),
3262 &exception);
3263 } while (exception.retry);
3264 return err;
3265}
3266
57dc9a57
TM		 3267struct nfs4_createdata {
3268 struct rpc_message msg;
3269 struct nfs4_create_arg arg;
3270 struct nfs4_create_res res;
3271 struct nfs_fh fh;
3272 struct nfs_fattr fattr;
57dc9a57
TM		 3273};
3274
3275static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3276 struct qstr *name, struct iattr *sattr, u32 ftype)
3277{
3278 struct nfs4_createdata *data;
3279
3280 data = kzalloc(sizeof(*data), GFP_KERNEL);
3281 if (data != NULL) {
3282 struct nfs_server *server = NFS_SERVER(dir);
3283
3284 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3285 data->msg.rpc_argp = &data->arg;
3286 data->msg.rpc_resp = &data->res;
3287 data->arg.dir_fh = NFS_FH(dir);
3288 data->arg.server = server;
3289 data->arg.name = name;
3290 data->arg.attrs = sattr;
3291 data->arg.ftype = ftype;
3292 data->arg.bitmask = server->attr_bitmask;
3293 data->res.server = server;
3294 data->res.fh = &data->fh;
3295 data->res.fattr = &data->fattr;
57dc9a57 3296 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3297 }
3298 return data;
3299}
3300
3301static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3302{
7c513058 3303 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3304 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3305 if (status == 0) {
3306 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3307 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3308 }
3309 return status;
3310}
3311
3312static void nfs4_free_createdata(struct nfs4_createdata *data)
3313{
3314 kfree(data);
3315}
3316
4f390c15 3317static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3318 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3319{
57dc9a57
TM		 3320 struct nfs4_createdata *data;
3321 int status = -ENAMETOOLONG;
1da177e4 3322
94a6d753 3323 if (len > NFS4_MAXPATHLEN)
57dc9a57 3324 goto out;
4f390c15 3325
57dc9a57
TM		 3326 status = -ENOMEM;
3327 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3328 if (data == NULL)
3329 goto out;
3330
3331 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3332 data->arg.u.symlink.pages = &page;
3333 data->arg.u.symlink.len = len;
1da177e4 3334
57dc9a57
TM		 3335 status = nfs4_do_create(dir, dentry, data);
3336
3337 nfs4_free_createdata(data);
3338out:
1da177e4
LT		 3339 return status;
3340}
3341
4f390c15 3342static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3343 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3344{
3345 struct nfs4_exception exception = { };
3346 int err;
3347 do {
3348 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3349 _nfs4_proc_symlink(dir, dentry, page,
3350 len, sattr),
1da177e4
LT		 3351 &exception);
3352 } while (exception.retry);
3353 return err;
3354}
3355
3356static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3357 struct iattr *sattr)
3358{
57dc9a57
TM		 3359 struct nfs4_createdata *data;
3360 int status = -ENOMEM;
1da177e4 3361
57dc9a57
TM		 3362 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3363 if (data == NULL)
3364 goto out;
3365
3366 status = nfs4_do_create(dir, dentry, data);
3367
3368 nfs4_free_createdata(data);
3369out:
1da177e4
LT		 3370 return status;
3371}
3372
3373static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3374 struct iattr *sattr)
3375{
3376 struct nfs4_exception exception = { };
3377 int err;
a8a5da99
AK		 3378
3379 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3380 do {
3381 err = nfs4_handle_exception(NFS_SERVER(dir),
3382 _nfs4_proc_mkdir(dir, dentry, sattr),
3383 &exception);
3384 } while (exception.retry);
3385 return err;
3386}
3387
3388static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3389 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3390{
3391 struct inode *dir = dentry->d_inode;
3392 struct nfs4_readdir_arg args = {
3393 .fh = NFS_FH(dir),
56e4ebf8 3394 .pages = pages,
1da177e4
LT		 3395 .pgbase = 0,
3396 .count = count,
96d25e53 3397 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3398 .plus = plus,
1da177e4
LT		 3399 };
3400 struct nfs4_readdir_res res;
3401 struct rpc_message msg = {
3402 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3403 .rpc_argp = &args,
3404 .rpc_resp = &res,
3405 .rpc_cred = cred,
3406 };
3407 int status;
3408
3110ff80 3409 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3410 dentry->d_parent->d_name.name,
3411 dentry->d_name.name,
3412 (unsigned long long)cookie);
c3f52af3 3413 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3414 res.pgbase = args.pgbase;
7c513058 3415 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3416 if (status >= 0) {
c3f52af3 3417 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3418 status += args.pgbase;
3419 }
c4812998
TM		 3420
3421 nfs_invalidate_atime(dir);
3422
3110ff80 3423 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3424 return status;
3425}
3426
3427static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3428 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3429{
3430 struct nfs4_exception exception = { };
3431 int err;
3432 do {
3433 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3434 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3435 pages, count, plus),
1da177e4
LT		 3436 &exception);
3437 } while (exception.retry);
3438 return err;
3439}
3440
3441static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3442 struct iattr *sattr, dev_t rdev)
3443{
57dc9a57
TM		 3444 struct nfs4_createdata *data;
3445 int mode = sattr->ia_mode;
3446 int status = -ENOMEM;
1da177e4 3447
57dc9a57
TM		 3448 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3449 if (data == NULL)
3450 goto out;
3451
1da177e4 3452 if (S_ISFIFO(mode))
57dc9a57 3453 data->arg.ftype = NF4FIFO;
1da177e4 3454 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3455 data->arg.ftype = NF4BLK;
3456 data->arg.u.device.specdata1 = MAJOR(rdev);
3457 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3458 }
3459 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3460 data->arg.ftype = NF4CHR;
3461 data->arg.u.device.specdata1 = MAJOR(rdev);
3462 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3463 } else if (!S_ISSOCK(mode)) {
3464 status = -EINVAL;
3465 goto out_free;
1da177e4 3466 }
1da177e4 3467
57dc9a57 3468 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3469out_free:
57dc9a57
TM		 3470 nfs4_free_createdata(data);
3471out:
1da177e4
LT		 3472 return status;
3473}
3474
3475static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3476 struct iattr *sattr, dev_t rdev)
3477{
3478 struct nfs4_exception exception = { };
3479 int err;
a8a5da99
AK		 3480
3481 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3482 do {
3483 err = nfs4_handle_exception(NFS_SERVER(dir),
3484 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3485 &exception);
3486 } while (exception.retry);
3487 return err;
3488}
3489
3490static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3491 struct nfs_fsstat *fsstat)
3492{
3493 struct nfs4_statfs_arg args = {
3494 .fh = fhandle,
3495 .bitmask = server->attr_bitmask,
3496 };
24ad148a
BH		 3497 struct nfs4_statfs_res res = {
3498 .fsstat = fsstat,
3499 };
1da177e4
LT		 3500 struct rpc_message msg = {
3501 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3502 .rpc_argp = &args,
24ad148a 3503 .rpc_resp = &res,
1da177e4
LT		 3504 };
3505
0e574af1 3506 nfs_fattr_init(fsstat->fattr);
7c513058 3507 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3508}
3509
3510static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3511{
3512 struct nfs4_exception exception = { };
3513 int err;
3514 do {
3515 err = nfs4_handle_exception(server,
3516 _nfs4_proc_statfs(server, fhandle, fsstat),
3517 &exception);
3518 } while (exception.retry);
3519 return err;
3520}
3521
3522static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3523 struct nfs_fsinfo *fsinfo)
3524{
3525 struct nfs4_fsinfo_arg args = {
3526 .fh = fhandle,
3527 .bitmask = server->attr_bitmask,
3528 };
3dda5e43
BH		 3529 struct nfs4_fsinfo_res res = {
3530 .fsinfo = fsinfo,
3531 };
1da177e4
LT		 3532 struct rpc_message msg = {
3533 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3534 .rpc_argp = &args,
3dda5e43 3535 .rpc_resp = &res,
1da177e4
LT		 3536 };
3537
7c513058 3538 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3539}
3540
3541static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3542{
3543 struct nfs4_exception exception = { };
83ca7f5a 3544 unsigned long now = jiffies;
1da177e4
LT		 3545 int err;
3546
3547 do {
83ca7f5a
CL		 3548 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
3549 if (err == 0) {
3550 struct nfs_client *clp = server->nfs_client;
3551
3552 spin_lock(&clp->cl_lock);
3553 clp->cl_lease_time = fsinfo->lease_time * HZ;
3554 clp->cl_last_renewal = now;
3555 spin_unlock(&clp->cl_lock);
3556 break;
3557 }
3558 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3559 } while (exception.retry);
3560 return err;
3561}
3562
3563static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3564{
e38eb650
BS		 3565 int error;
3566
0e574af1 3567 nfs_fattr_init(fsinfo->fattr);
e38eb650 3568 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3569 if (error == 0) {
3570 /* block layout checks this! */
3571 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3572 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3573 }
e38eb650
BS		 3574
3575 return error;
1da177e4
LT		 3576}
3577
3578static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3579 struct nfs_pathconf *pathconf)
3580{
3581 struct nfs4_pathconf_arg args = {
3582 .fh = fhandle,
3583 .bitmask = server->attr_bitmask,
3584 };
d45b2989
BH		 3585 struct nfs4_pathconf_res res = {
3586 .pathconf = pathconf,
3587 };
1da177e4
LT		 3588 struct rpc_message msg = {
3589 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3590 .rpc_argp = &args,
d45b2989 3591 .rpc_resp = &res,
1da177e4
LT		 3592 };
3593
3594 /* None of the pathconf attributes are mandatory to implement */
3595 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3596 memset(pathconf, 0, sizeof(*pathconf));
3597 return 0;
3598 }
3599
0e574af1 3600 nfs_fattr_init(pathconf->fattr);
7c513058 3601 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3602}
3603
3604static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3605 struct nfs_pathconf *pathconf)
3606{
3607 struct nfs4_exception exception = { };
3608 int err;
3609
3610 do {
3611 err = nfs4_handle_exception(server,
3612 _nfs4_proc_pathconf(server, fhandle, pathconf),
3613 &exception);
3614 } while (exception.retry);
3615 return err;
3616}
3617
5521abfd 3618int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3619 const struct nfs_open_context *ctx,
3620 const struct nfs_lock_context *l_ctx,
3621 fmode_t fmode)
3622{
3623 const struct nfs_lockowner *lockowner = NULL;
3624
3625 if (l_ctx != NULL)
3626 lockowner = &l_ctx->lockowner;
5521abfd 3627 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3628}
3629EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3630
5521abfd
TM		 3631static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3632 const struct nfs_open_context *ctx,
3633 const struct nfs_lock_context *l_ctx,
3634 fmode_t fmode)
3635{
3636 nfs4_stateid current_stateid;
3637
c8dd8fdf
TM		 3638 /* If the current stateid represents a lost lock, then exit */
3639 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
3640 return true;
5521abfd
TM		 3641 return nfs4_stateid_match(stateid, &current_stateid);
3642}
3643
3644static bool nfs4_error_stateid_expired(int err)
3645{
3646 switch (err) {
3647 case -NFS4ERR_DELEG_REVOKED:
3648 case -NFS4ERR_ADMIN_REVOKED:
3649 case -NFS4ERR_BAD_STATEID:
3650 case -NFS4ERR_STALE_STATEID:
3651 case -NFS4ERR_OLD_STATEID:
3652 case -NFS4ERR_OPENMODE:
3653 case -NFS4ERR_EXPIRED:
3654 return true;
3655 }
3656 return false;
3657}
3658
d20581aa
BH		 3659void __nfs4_read_done_cb(struct nfs_read_data *data)
3660{
cd841605 3661 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3662}
3663
cbdabc7f 3664static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3665{
cd841605 3666 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3667
9e33bed5 3668 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3669 rpc_restart_call_prepare(task);
ec06c096 3670 return -EAGAIN;
1da177e4 3671 }
8850df99 3672
d20581aa 3673 __nfs4_read_done_cb(data);
1da177e4 3674 if (task->tk_status > 0)
ec06c096
TM		 3675 renew_lease(server, data->timestamp);
3676 return 0;
1da177e4
LT		 3677}
3678
5521abfd
TM		 3679static bool nfs4_read_stateid_changed(struct rpc_task *task,
3680 struct nfs_readargs *args)
3681{
3682
3683 if (!nfs4_error_stateid_expired(task->tk_status) ||
3684 nfs4_stateid_is_current(&args->stateid,
3685 args->context,
3686 args->lock_context,
3687 FMODE_READ))
3688 return false;
3689 rpc_restart_call_prepare(task);
3690 return true;
3691}
3692
cbdabc7f
AA		 3693static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3694{
3695
3696 dprintk("--> %s\n", __func__);
3697
3698 if (!nfs4_sequence_done(task, &data->res.seq_res))
3699 return -EAGAIN;
5521abfd
TM		 3700 if (nfs4_read_stateid_changed(task, &data->args))
3701 return -EAGAIN;
d20581aa
BH		 3702 return data->read_done_cb ? data->read_done_cb(task, data) :
3703 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3704}
3705
bdc7f021 3706static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3707{
1da177e4 3708 data->timestamp = jiffies;
cbdabc7f 3709 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3710 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3711 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3712}
3713
ea7c3303
BS		 3714static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3715{
9b206149 3716 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3717 &data->args.seq_args,
3718 &data->res.seq_res,
9b206149
TM		 3719 task))
3720 return;
3721 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3722 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3723}
3724
b029bc9b 3725static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3726{
cd841605 3727 struct inode *inode = data->header->inode;
1da177e4 3728
9e33bed5 3729 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3730 rpc_restart_call_prepare(task);
788e7a89 3731 return -EAGAIN;
1da177e4 3732 }
4f9838c7 3733 if (task->tk_status >= 0) {
1da177e4 3734 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3735 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3736 }
788e7a89 3737 return 0;
1da177e4
LT		 3738}
3739
5521abfd
TM		 3740static bool nfs4_write_stateid_changed(struct rpc_task *task,
3741 struct nfs_writeargs *args)
3742{
3743
3744 if (!nfs4_error_stateid_expired(task->tk_status) ||
3745 nfs4_stateid_is_current(&args->stateid,
3746 args->context,
3747 args->lock_context,
3748 FMODE_WRITE))
3749 return false;
3750 rpc_restart_call_prepare(task);
3751 return true;
3752}
3753
b029bc9b
FI		 3754static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3755{
3756 if (!nfs4_sequence_done(task, &data->res.seq_res))
3757 return -EAGAIN;
5521abfd
TM		 3758 if (nfs4_write_stateid_changed(task, &data->args))
3759 return -EAGAIN;
d20581aa
BH		 3760 return data->write_done_cb ? data->write_done_cb(task, data) :
3761 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3762}
3763
5a37f851
TM		 3764static
3765bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3766{
5a37f851
TM		 3767 const struct nfs_pgio_header *hdr = data->header;
3768
3769 /* Don't request attributes for pNFS or O_DIRECT writes */
3770 if (data->ds_clp != NULL || hdr->dreq != NULL)
3771 return false;
3772 /* Otherwise, request attributes if and only if we don't hold
3773 * a delegation
3774 */
011e2a7f 3775 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3776}
a69aef14 3777
bdc7f021 3778static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3779{
cd841605 3780 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3781
5a37f851 3782 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3783 data->args.bitmask = NULL;
3784 data->res.fattr = NULL;
3785 } else
3786 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3787
b029bc9b
FI		 3788 if (!data->write_done_cb)
3789 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3790 data->res.server = server;
1da177e4
LT		 3791 data->timestamp = jiffies;
3792
bdc7f021 3793 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3794 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3795}
3796
c6cb80d0
BS		 3797static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3798{
9b206149 3799 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3800 &data->args.seq_args,
3801 &data->res.seq_res,
9b206149
TM		 3802 task))
3803 return;
3804 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3805 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 3806}
3807
0b7c0153 3808static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3809{
d9afbd1b
TM		 3810 nfs4_setup_sequence(NFS_SERVER(data->inode),
3811 &data->args.seq_args,
3812 &data->res.seq_res,
3813 task);
1da177e4
LT		 3814}
3815
0b7c0153 3816static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3817{
1da177e4 3818 struct inode *inode = data->inode;
14516c3a 3819
9e33bed5 3820 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3821 rpc_restart_call_prepare(task);
788e7a89 3822 return -EAGAIN;
1da177e4 3823 }
788e7a89 3824 return 0;
1da177e4
LT		 3825}
3826
0b7c0153 3827static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3828{
3829 if (!nfs4_sequence_done(task, &data->res.seq_res))
3830 return -EAGAIN;
0b7c0153 3831 return data->commit_done_cb(task, data);
5f452431
FI		 3832}
3833
0b7c0153 3834static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3835{
788e7a89 3836 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3837
0b7c0153
FI		 3838 if (data->commit_done_cb == NULL)
3839 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3840 data->res.server = server;
bdc7f021 3841 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3842 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3843}
3844
9bc4e3ca
CL		 3845struct nfs4_renewdata {
3846 struct nfs_client *client;
3847 unsigned long timestamp;
3848};
3849
1da177e4
LT		 3850/*
3851 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3852 * standalone procedure for queueing an asynchronous RENEW.
3853 */
9bc4e3ca 3854static void nfs4_renew_release(void *calldata)
dc96aef9 3855{
9bc4e3ca
CL		 3856 struct nfs4_renewdata *data = calldata;
3857 struct nfs_client *clp = data->client;
dc96aef9 3858
0851de06
AB		 3859 if (atomic_read(&clp->cl_count) > 1)
3860 nfs4_schedule_state_renewal(clp);
3861 nfs_put_client(clp);
9bc4e3ca 3862 kfree(data);
dc96aef9
AB		 3863}
3864
9bc4e3ca 3865static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3866{
9bc4e3ca
CL		 3867 struct nfs4_renewdata *data = calldata;
3868 struct nfs_client *clp = data->client;
3869 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3870
3871 if (task->tk_status < 0) {
95baa25c 3872 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3873 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3874 return;
3875 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3876 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3877 return;
3878 }
3879 nfs4_schedule_path_down_recovery(clp);
1da177e4 3880 }
452e9352 3881 do_renew_lease(clp, timestamp);
1da177e4
LT		 3882}
3883
963d8fe5
TM		 3884static const struct rpc_call_ops nfs4_renew_ops = {
3885 .rpc_call_done = nfs4_renew_done,
dc96aef9 3886 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3887};
3888
2f60ea6b 3889static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3890{
3891 struct rpc_message msg = {
3892 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3893 .rpc_argp = clp,
b4454fe1 3894 .rpc_cred = cred,
1da177e4 3895 };
9bc4e3ca 3896 struct nfs4_renewdata *data;
1da177e4 3897
2f60ea6b
TM		 3898 if (renew_flags == 0)
3899 return 0;
0851de06
AB		 3900 if (!atomic_inc_not_zero(&clp->cl_count))
3901 return -EIO;
b569ad34 3902 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3903 if (data == NULL)
3904 return -ENOMEM;
3905 data->client = clp;
3906 data->timestamp = jiffies;
bc7a05ca 3907 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 3908 &nfs4_renew_ops, data);
1da177e4
LT		 3909}
3910
8534d4ec 3911static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3912{
3913 struct rpc_message msg = {
3914 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3915 .rpc_argp = clp,
b4454fe1 3916 .rpc_cred = cred,
1da177e4
LT		 3917 };
3918 unsigned long now = jiffies;
3919 int status;
3920
bc7a05ca 3921 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3922 if (status < 0)
3923 return status;
452e9352 3924 do_renew_lease(clp, now);
1da177e4
LT		 3925 return 0;
3926}
3927
aa1870af
BF		 3928static inline int nfs4_server_supports_acls(struct nfs_server *server)
3929{
3930 return (server->caps & NFS_CAP_ACLS)
3931 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3932 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3933}
3934
21f498c2
TM		 3935/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3936 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3937 * the stack.
3938 */
21f498c2 3939#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3940
e9e3d724
NH		 3941static int buf_to_pages_noslab(const void *buf, size_t buflen,
3942 struct page **pages, unsigned int *pgbase)
3943{
3944 struct page *newpage, **spages;
3945 int rc = 0;
3946 size_t len;
3947 spages = pages;
3948
3949 do {
21f498c2 3950 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3951 newpage = alloc_page(GFP_KERNEL);
3952
3953 if (newpage == NULL)
3954 goto unwind;
3955 memcpy(page_address(newpage), buf, len);
3956 buf += len;
3957 buflen -= len;
3958 *pages++ = newpage;
3959 rc++;
3960 } while (buflen != 0);
3961
3962 return rc;
3963
3964unwind:
3965 for(; rc > 0; rc--)
3966 __free_page(spages[rc-1]);
3967 return -ENOMEM;
3968}
3969
e50a1c2e
BF		 3970struct nfs4_cached_acl {
3971 int cached;
3972 size_t len;
3e9d4154 3973 char data[0];
e50a1c2e
BF		 3974};
3975
3976static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3977{
3978 struct nfs_inode *nfsi = NFS_I(inode);
3979
3980 spin_lock(&inode->i_lock);
3981 kfree(nfsi->nfs4_acl);
3982 nfsi->nfs4_acl = acl;
3983 spin_unlock(&inode->i_lock);
3984}
3985
3986static void nfs4_zap_acl_attr(struct inode *inode)
3987{
3988 nfs4_set_cached_acl(inode, NULL);
3989}
3990
3991static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3992{
3993 struct nfs_inode *nfsi = NFS_I(inode);
3994 struct nfs4_cached_acl *acl;
3995 int ret = -ENOENT;
3996
3997 spin_lock(&inode->i_lock);
3998 acl = nfsi->nfs4_acl;
3999 if (acl == NULL)
4000 goto out;
4001 if (buf == NULL) /* user is just asking for length */
4002 goto out_len;
4003 if (acl->cached == 0)
4004 goto out;
4005 ret = -ERANGE; /* see getxattr(2) man page */
4006 if (acl->len > buflen)
4007 goto out;
4008 memcpy(buf, acl->data, acl->len);
4009out_len:
4010 ret = acl->len;
4011out:
4012 spin_unlock(&inode->i_lock);
4013 return ret;
4014}
4015
5794d21e 4016static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4017{
4018 struct nfs4_cached_acl *acl;
b291f1b1 4019 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4020
1f1ea6c2 4021 if (buflen <= PAGE_SIZE) {
b291f1b1 4022 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4023 if (acl == NULL)
4024 goto out;
4025 acl->cached = 1;
5794d21e 4026 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4027 } else {
4028 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4029 if (acl == NULL)
4030 goto out;
4031 acl->cached = 0;
4032 }
4033 acl->len = acl_len;
4034out:
4035 nfs4_set_cached_acl(inode, acl);
4036}
4037
bf118a34
AA		 4038/*
4039 * The getxattr API returns the required buffer length when called with a
4040 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4041 * the required buf. On a NULL buf, we send a page of data to the server
4042 * guessing that the ACL request can be serviced by a page. If so, we cache
4043 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4044 * the cache. If not so, we throw away the page, and cache the required
4045 * length. The next getxattr call will then produce another round trip to
4046 * the server, this time with the input buf of the required size.
4047 */
16b4289c 4048static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4049{
249eb349 4050 struct page *pages[NFS4ACL_MAXPAGES + 1] = {NULL, };
aa1870af
BF		 4051 struct nfs_getaclargs args = {
4052 .fh = NFS_FH(inode),
4053 .acl_pages = pages,
4054 .acl_len = buflen,
4055 };
663c79b3
BH		 4056 struct nfs_getaclres res = {
4057 .acl_len = buflen,
4058 };
aa1870af
BF		 4059 struct rpc_message msg = {
4060 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4061 .rpc_argp = &args,
663c79b3 4062 .rpc_resp = &res,
aa1870af 4063 };
249eb349 4064 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1;
21f498c2 4065 int ret = -ENOMEM, i;
aa1870af 4066
21f498c2
TM		 4067 if (npages > ARRAY_SIZE(pages))
4068 return -ERANGE;
5a006899 4069
bf118a34
AA		 4070 for (i = 0; i < npages; i++) {
4071 pages[i] = alloc_page(GFP_KERNEL);
4072 if (!pages[i])
4073 goto out_free;
e50a1c2e 4074 }
5a006899
SP		 4075
4076 /* for decoding across pages */
4077 res.acl_scratch = alloc_page(GFP_KERNEL);
4078 if (!res.acl_scratch)
4079 goto out_free;
4080
bf118a34
AA		 4081 args.acl_len = npages * PAGE_SIZE;
4082 args.acl_pgbase = 0;
5a006899 4083
de040bec 4084 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4085 __func__, buf, buflen, npages, args.acl_len);
4086 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4087 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4088 if (ret)
4089 goto out_free;
bf118a34 4090
1f1ea6c2
TM		 4091 /* Handle the case where the passed-in buffer is too short */
4092 if (res.acl_flags & NFS4_ACL_TRUNC) {
4093 /* Did the user only issue a request for the acl length? */
4094 if (buf == NULL)
4095 goto out_ok;
e50a1c2e 4096 ret = -ERANGE;
1f1ea6c2 4097 goto out_free;
e50a1c2e 4098 }
1f1ea6c2 4099 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4100 if (buf) {
4101 if (res.acl_len > buflen) {
4102 ret = -ERANGE;
4103 goto out_free;
4104 }
1f1ea6c2 4105 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4106 }
1f1ea6c2
TM		 4107out_ok:
4108 ret = res.acl_len;
e50a1c2e 4109out_free:
bf118a34
AA		 4110 for (i = 0; i < npages; i++)
4111 if (pages[i])
4112 __free_page(pages[i]);
331818f1
TM		 4113 if (res.acl_scratch)
4114 __free_page(res.acl_scratch);
aa1870af
BF		 4115 return ret;
4116}
4117
16b4289c
TM		 4118static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4119{
4120 struct nfs4_exception exception = { };
4121 ssize_t ret;
4122 do {
4123 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4124 if (ret >= 0)
4125 break;
4126 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4127 } while (exception.retry);
4128 return ret;
4129}
4130
e50a1c2e
BF		 4131static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4132{
4133 struct nfs_server *server = NFS_SERVER(inode);
4134 int ret;
4135
4136 if (!nfs4_server_supports_acls(server))
4137 return -EOPNOTSUPP;
4138 ret = nfs_revalidate_inode(server, inode);
4139 if (ret < 0)
4140 return ret;
08a22b39
AK		 4141 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4142 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4143 ret = nfs4_read_cached_acl(inode, buf, buflen);
4144 if (ret != -ENOENT)
bf118a34
AA		 4145 /* -ENOENT is returned if there is no ACL or if there is an ACL
4146 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4147 return ret;
4148 return nfs4_get_acl_uncached(inode, buf, buflen);
4149}
4150
16b4289c 4151static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4152{
4153 struct nfs_server *server = NFS_SERVER(inode);
4154 struct page *pages[NFS4ACL_MAXPAGES];
4155 struct nfs_setaclargs arg = {
4156 .fh = NFS_FH(inode),
4157 .acl_pages = pages,
4158 .acl_len = buflen,
4159 };
73c403a9 4160 struct nfs_setaclres res;
4b580ee3
BF		 4161 struct rpc_message msg = {
4162 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4163 .rpc_argp = &arg,
73c403a9 4164 .rpc_resp = &res,
4b580ee3 4165 };
21f498c2 4166 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4167 int ret, i;
4b580ee3
BF		 4168
4169 if (!nfs4_server_supports_acls(server))
4170 return -EOPNOTSUPP;
21f498c2
TM		 4171 if (npages > ARRAY_SIZE(pages))
4172 return -ERANGE;
e9e3d724
NH		 4173 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4174 if (i < 0)
4175 return i;
57ec14c5 4176 nfs4_inode_return_delegation(inode);
7c513058 4177 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4178
4179 /*
4180 * Free each page after tx, so the only ref left is
4181 * held by the network stack
4182 */
4183 for (; i > 0; i--)
4184 put_page(pages[i-1]);
4185
08a22b39
AK		 4186 /*
4187 * Acl update can result in inode attribute update.
4188 * so mark the attribute cache invalid.
4189 */
4190 spin_lock(&inode->i_lock);
4191 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4192 spin_unlock(&inode->i_lock);
f41f7418
TM		 4193 nfs_access_zap_cache(inode);
4194 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4195 return ret;
4196}
4197
16b4289c
TM		 4198static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4199{
4200 struct nfs4_exception exception = { };
4201 int err;
4202 do {
4203 err = nfs4_handle_exception(NFS_SERVER(inode),
4204 __nfs4_proc_set_acl(inode, buf, buflen),
4205 &exception);
4206 } while (exception.retry);
4207 return err;
4208}
4209
1da177e4 4210static int
aa5190d0 4211nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4212{
aa5190d0
TM		 4213 struct nfs_client *clp = server->nfs_client;
4214
4215 if (task->tk_status >= 0)
1da177e4
LT		 4216 return 0;
4217 switch(task->tk_status) {
a1d0b5ee 4218 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4219 case -NFS4ERR_ADMIN_REVOKED:
4220 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4221 if (state == NULL)
4222 break;
4223 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4224 case -NFS4ERR_OPENMODE:
4225 if (state == NULL)
4226 break;
5d422301
TM		 4227 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4228 goto stateid_invalid;
0400a6b0 4229 goto wait_on_recovery;
0ced63d1 4230 case -NFS4ERR_EXPIRED:
5d422301
TM		 4231 if (state != NULL) {
4232 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4233 goto stateid_invalid;
4234 }
1da177e4 4235 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4236 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4237 nfs4_schedule_lease_recovery(clp);
4238 goto wait_on_recovery;
4745e315
AA		 4239#if defined(CONFIG_NFS_V4_1)
4240 case -NFS4ERR_BADSESSION:
4241 case -NFS4ERR_BADSLOT:
4242 case -NFS4ERR_BAD_HIGH_SLOT:
4243 case -NFS4ERR_DEADSESSION:
4244 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4245 case -NFS4ERR_SEQ_FALSE_RETRY:
4246 case -NFS4ERR_SEQ_MISORDERED:
4247 dprintk("%s ERROR %d, Reset session\n", __func__,
4248 task->tk_status);
9f594791 4249 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
39be1c3d 4250 goto wait_on_recovery;
4745e315 4251#endif /* CONFIG_NFS_V4_1 */
1da177e4 4252 case -NFS4ERR_DELAY:
aa5190d0 4253 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4254 case -NFS4ERR_GRACE:
1da177e4
LT		 4255 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4256 task->tk_status = 0;
4257 return -EAGAIN;
a8a4ae3a 4258 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4259 case -NFS4ERR_OLD_STATEID:
4260 task->tk_status = 0;
4261 return -EAGAIN;
4262 }
4263 task->tk_status = nfs4_map_errors(task->tk_status);
4264 return 0;
5d422301
TM		 4265stateid_invalid:
4266 task->tk_status = -EIO;
4267 return 0;
0400a6b0 4268wait_on_recovery:
a2c0b9e2 4269 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4270 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4271 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4272 task->tk_status = 0;
4273 return -EAGAIN;
1da177e4
LT		 4274}
4275
f092075d
CL		 4276static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4277 nfs4_verifier *bootverf)
cd93710e
CL		 4278{
4279 __be32 verf[2];
4280
2c820d9a
CL		 4281 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4282 /* An impossible timestamp guarantees this value
4283 * will never match a generated boot time. */
4284 verf[0] = 0;
4285 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4286 } else {
f092075d
CL		 4287 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4288 verf[0] = (__be32)nn->boot_time.tv_sec;
4289 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4290 }
cd93710e
CL		 4291 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4292}
4293
e984a55a
CL		 4294static unsigned int
4295nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4296 char *buf, size_t len)
4297{
4298 unsigned int result;
4299
4300 rcu_read_lock();
4301 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4302 clp->cl_ipaddr,
4303 rpc_peeraddr2str(clp->cl_rpcclient,
4304 RPC_DISPLAY_ADDR),
4305 rpc_peeraddr2str(clp->cl_rpcclient,
4306 RPC_DISPLAY_PROTO));
4307 rcu_read_unlock();
4308 return result;
4309}
4310
4311static unsigned int
4312nfs4_init_uniform_client_string(const struct nfs_client *clp,
4313 char *buf, size_t len)
4314{
6f2ea7f2
CL		 4315 char *nodename = clp->cl_rpcclient->cl_nodename;
4316
4317 if (nfs4_client_id_uniquifier[0] != '\0')
4318 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4319 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4320 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4321 nodename);
e984a55a
CL		 4322}
4323
6bbb4ae8
CL		 4324/**
4325 * nfs4_proc_setclientid - Negotiate client ID
4326 * @clp: state data structure
4327 * @program: RPC program for NFSv4 callback service
4328 * @port: IP port number for NFS4 callback service
4329 * @cred: RPC credential to use for this call
4330 * @res: where to place the result
4331 *
4332 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4333 */
bb8b27e5
TM		 4334int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4335 unsigned short port, struct rpc_cred *cred,
4336 struct nfs4_setclientid_res *res)
1da177e4
LT		 4337{
4338 nfs4_verifier sc_verifier;
4339 struct nfs4_setclientid setclientid = {
4340 .sc_verifier = &sc_verifier,
4341 .sc_prog = program,
f4eecd5d 4342 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4343 };
4344 struct rpc_message msg = {
4345 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4346 .rpc_argp = &setclientid,
bb8b27e5 4347 .rpc_resp = res,
286d7d6a 4348 .rpc_cred = cred,
1da177e4 4349 };
6bbb4ae8 4350 int status;
1da177e4 4351
de734831 4352 /* nfs_client_id4 */
f092075d 4353 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4354 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4355 setclientid.sc_name_len =
4356 nfs4_init_uniform_client_string(clp,
4357 setclientid.sc_name,
4358 sizeof(setclientid.sc_name));
4359 else
4360 setclientid.sc_name_len =
4361 nfs4_init_nonuniform_client_string(clp,
4362 setclientid.sc_name,
4363 sizeof(setclientid.sc_name));
de734831 4364 /* cb_client4 */
e984a55a 4365 rcu_read_lock();
de734831 4366 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4367 sizeof(setclientid.sc_netid),
4368 rpc_peeraddr2str(clp->cl_rpcclient,
4369 RPC_DISPLAY_NETID));
de734831
CL		 4370 rcu_read_unlock();
4371 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4372 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4373 clp->cl_ipaddr, port >> 8, port & 255);
4374
6bbb4ae8
CL		 4375 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4376 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4377 setclientid.sc_name_len, setclientid.sc_name);
4378 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4379 dprintk("NFS reply setclientid: %d\n", status);
4380 return status;
1da177e4
LT		 4381}
4382
6bbb4ae8
CL		 4383/**
4384 * nfs4_proc_setclientid_confirm - Confirm client ID
4385 * @clp: state data structure
4386 * @res: result of a previous SETCLIENTID
4387 * @cred: RPC credential to use for this call
4388 *
4389 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4390 */
fd954ae1 4391int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4392 struct nfs4_setclientid_res *arg,
4393 struct rpc_cred *cred)
1da177e4 4394{
1da177e4
LT		 4395 struct rpc_message msg = {
4396 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4397 .rpc_argp = arg,
286d7d6a 4398 .rpc_cred = cred,
1da177e4 4399 };
1da177e4
LT		 4400 int status;
4401
6bbb4ae8
CL		 4402 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4403 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4404 clp->cl_clientid);
1bd714f2 4405 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6bbb4ae8 4406 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4407 return status;
4408}
4409
fe650407
TM		 4410struct nfs4_delegreturndata {
4411 struct nfs4_delegreturnargs args;
fa178f29 4412 struct nfs4_delegreturnres res;
fe650407
TM		 4413 struct nfs_fh fh;
4414 nfs4_stateid stateid;
26e976a8 4415 unsigned long timestamp;
fa178f29 4416 struct nfs_fattr fattr;
fe650407
TM		 4417 int rpc_status;
4418};
4419
fe650407
TM		 4420static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4421{
4422 struct nfs4_delegreturndata *data = calldata;
938e1010 4423
14516c3a
TM		 4424 if (!nfs4_sequence_done(task, &data->res.seq_res))
4425 return;
938e1010 4426
79708861 4427 switch (task->tk_status) {
79708861 4428 case 0:
fa178f29 4429 renew_lease(data->res.server, data->timestamp);
79708861 4430 break;
0d08c381
TM		 4431 case -NFS4ERR_ADMIN_REVOKED:
4432 case -NFS4ERR_DELEG_REVOKED:
4433 case -NFS4ERR_BAD_STATEID:
4434 case -NFS4ERR_OLD_STATEID:
4435 case -NFS4ERR_STALE_STATEID:
4436 case -NFS4ERR_EXPIRED:
4437 task->tk_status = 0;
4438 break;
79708861
RL		 4439 default:
4440 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4441 -EAGAIN) {
d00c5d43 4442 rpc_restart_call_prepare(task);
79708861
RL		 4443 return;
4444 }
4445 }
4446 data->rpc_status = task->tk_status;
fe650407
TM		 4447}
4448
4449static void nfs4_delegreturn_release(void *calldata)
4450{
fe650407
TM		 4451 kfree(calldata);
4452}
4453
938e1010
AA		 4454#if defined(CONFIG_NFS_V4_1)
4455static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4456{
4457 struct nfs4_delegreturndata *d_data;
4458
4459 d_data = (struct nfs4_delegreturndata *)data;
4460
d9afbd1b
TM		 4461 nfs4_setup_sequence(d_data->res.server,
4462 &d_data->args.seq_args,
4463 &d_data->res.seq_res,
4464 task);
938e1010
AA		 4465}
4466#endif /* CONFIG_NFS_V4_1 */
4467
c8d149f3 4468static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4469#if defined(CONFIG_NFS_V4_1)
4470 .rpc_call_prepare = nfs4_delegreturn_prepare,
4471#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4472 .rpc_call_done = nfs4_delegreturn_done,
4473 .rpc_release = nfs4_delegreturn_release,
4474};
4475
e6f81075 4476static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4477{
4478 struct nfs4_delegreturndata *data;
fa178f29 4479 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4480 struct rpc_task *task;
5138fde0
TM		 4481 struct rpc_message msg = {
4482 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4483 .rpc_cred = cred,
4484 };
c970aa85
TM		 4485 struct rpc_task_setup task_setup_data = {
4486 .rpc_client = server->client,
5138fde0 4487 .rpc_message = &msg,
c970aa85
TM		 4488 .callback_ops = &nfs4_delegreturn_ops,
4489 .flags = RPC_TASK_ASYNC,
4490 };
e6f81075 4491 int status = 0;
fe650407 4492
8535b2be 4493 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4494 if (data == NULL)
4495 return -ENOMEM;
9d12b216 4496 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4497 data->args.fhandle = &data->fh;
4498 data->args.stateid = &data->stateid;
9e907fec 4499 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4500 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4501 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4502 data->res.fattr = &data->fattr;
4503 data->res.server = server;
5138fde0 4504 nfs_fattr_init(data->res.fattr);
26e976a8 4505 data->timestamp = jiffies;
fe650407
TM		 4506 data->rpc_status = 0;
4507
c970aa85 4508 task_setup_data.callback_data = data;
1174dd1f
TM		 4509 msg.rpc_argp = &data->args;
4510 msg.rpc_resp = &data->res;
c970aa85 4511 task = rpc_run_task(&task_setup_data);
7a1218a2 4512 if (IS_ERR(task))
fe650407 4513 return PTR_ERR(task);
e6f81075
TM		 4514 if (!issync)
4515 goto out;
fe650407 4516 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4517 if (status != 0)
4518 goto out;
4519 status = data->rpc_status;
e144cbcc
TM		 4520 if (status == 0)
4521 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4522 else
4523 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4524out:
e6b3c4db 4525 rpc_put_task(task);
fe650407 4526 return status;
1da177e4
LT		 4527}
4528
e6f81075 4529int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4530{
4531 struct nfs_server *server = NFS_SERVER(inode);
4532 struct nfs4_exception exception = { };
4533 int err;
4534 do {
e6f81075 4535 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4536 switch (err) {
4537 case -NFS4ERR_STALE_STATEID:
4538 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4539 case 0:
4540 return 0;
4541 }
4542 err = nfs4_handle_exception(server, err, &exception);
4543 } while (exception.retry);
4544 return err;
4545}
4546
4547#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4548#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4549
4550/*
4551 * sleep, with exponential backoff, and retry the LOCK operation.
4552 */
4553static unsigned long
4554nfs4_set_lock_task_retry(unsigned long timeout)
4555{
6fa3eb70 4556 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 4557 timeout <<= 1;
4558 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4559 return NFS4_LOCK_MAXTIMEOUT;
4560 return timeout;
4561}
4562
1da177e4
LT		 4563static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4564{
4565 struct inode *inode = state->inode;
4566 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4567 struct nfs_client *clp = server->nfs_client;
911d1aaf 4568 struct nfs_lockt_args arg = {
1da177e4 4569 .fh = NFS_FH(inode),
911d1aaf 4570 .fl = request,
1da177e4 4571 };
911d1aaf
TM		 4572 struct nfs_lockt_res res = {
4573 .denied = request,
1da177e4
LT		 4574 };
4575 struct rpc_message msg = {
4576 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4577 .rpc_argp = &arg,
4578 .rpc_resp = &res,
4579 .rpc_cred = state->owner->so_cred,
4580 };
1da177e4
LT		 4581 struct nfs4_lock_state *lsp;
4582 int status;
4583
911d1aaf 4584 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4585 status = nfs4_set_lock_state(state, request);
4586 if (status != 0)
4587 goto out;
4588 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4589 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4590 arg.lock_owner.s_dev = server->s_dev;
7c513058 4591 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4592 switch (status) {
4593 case 0:
4594 request->fl_type = F_UNLCK;
4595 break;
4596 case -NFS4ERR_DENIED:
4597 status = 0;
1da177e4 4598 }
70cc6487 4599 request->fl_ops->fl_release_private(request);
55fce163 4600 request->fl_ops = NULL;
8d0a8a9d 4601out:
1da177e4
LT		 4602 return status;
4603}
4604
4605static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4606{
4607 struct nfs4_exception exception = { };
4608 int err;
4609
4610 do {
4611 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4612 _nfs4_proc_getlk(state, cmd, request),
4613 &exception);
4614 } while (exception.retry);
4615 return err;
4616}
4617
4618static int do_vfs_lock(struct file *file, struct file_lock *fl)
4619{
4620 int res = 0;
4621 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4622 case FL_POSIX:
4623 res = posix_lock_file_wait(file, fl);
4624 break;
4625 case FL_FLOCK:
4626 res = flock_lock_file_wait(file, fl);
4627 break;
4628 default:
4629 BUG();
4630 }
1da177e4
LT		 4631 return res;
4632}
4633
faf5f49c 4634struct nfs4_unlockdata {
911d1aaf
TM		 4635 struct nfs_locku_args arg;
4636 struct nfs_locku_res res;
faf5f49c
TM		 4637 struct nfs4_lock_state *lsp;
4638 struct nfs_open_context *ctx;
911d1aaf
TM		 4639 struct file_lock fl;
4640 const struct nfs_server *server;
26e976a8 4641 unsigned long timestamp;
faf5f49c
TM		 4642};
4643
911d1aaf
TM		 4644static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4645 struct nfs_open_context *ctx,
4646 struct nfs4_lock_state *lsp,
4647 struct nfs_seqid *seqid)
4648{
4649 struct nfs4_unlockdata *p;
4650 struct inode *inode = lsp->ls_state->inode;
4651
8535b2be 4652 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4653 if (p == NULL)
4654 return NULL;
4655 p->arg.fh = NFS_FH(inode);
4656 p->arg.fl = &p->fl;
4657 p->arg.seqid = seqid;
c1d51931 4658 p->res.seqid = seqid;
911d1aaf
TM		 4659 p->arg.stateid = &lsp->ls_stateid;
4660 p->lsp = lsp;
4661 atomic_inc(&lsp->ls_count);
4662 /* Ensure we don't close file until we're done freeing locks! */
4663 p->ctx = get_nfs_open_context(ctx);
4664 memcpy(&p->fl, fl, sizeof(p->fl));
4665 p->server = NFS_SERVER(inode);
4666 return p;
4667}
4668
06f814a3 4669static void nfs4_locku_release_calldata(void *data)
faf5f49c 4670{
963d8fe5 4671 struct nfs4_unlockdata *calldata = data;
911d1aaf 4672 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4673 nfs4_put_lock_state(calldata->lsp);
4674 put_nfs_open_context(calldata->ctx);
4675 kfree(calldata);
faf5f49c
TM		 4676}
4677
963d8fe5 4678static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4679{
963d8fe5 4680 struct nfs4_unlockdata *calldata = data;
faf5f49c 4681
14516c3a
TM		 4682 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4683 return;
faf5f49c
TM		 4684 switch (task->tk_status) {
4685 case 0:
f597c537
TM		 4686 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4687 &calldata->res.stateid);
26e976a8 4688 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4689 break;
9e33bed5
TM		 4690 case -NFS4ERR_BAD_STATEID:
4691 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4692 case -NFS4ERR_STALE_STATEID:
4693 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4694 break;
4695 default:
9e33bed5 4696 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4697 rpc_restart_call_prepare(task);
faf5f49c 4698 }
2b1bc308 4699 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4700}
4701
4ce70ada 4702static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4703{
4ce70ada 4704 struct nfs4_unlockdata *calldata = data;
faf5f49c 4705
911d1aaf 4706 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 4707 goto out_wait;
795a88c9 4708 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 4709 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 4710 goto out_no_action;
faf5f49c 4711 }
26e976a8 4712 calldata->timestamp = jiffies;
035168ab 4713 if (nfs4_setup_sequence(calldata->server,
a893693c 4714 &calldata->arg.seq_args,
2240a9e2
TM		 4715 &calldata->res.seq_res,
4716 task) != 0)
4717 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 4718 return;
4719out_no_action:
4720 task->tk_action = NULL;
4721out_wait:
4722 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4723}
4724
963d8fe5 4725static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4726 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4727 .rpc_call_done = nfs4_locku_done,
06f814a3 4728 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4729};
4730
a5d16a4d
TM		 4731static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4732 struct nfs_open_context *ctx,
4733 struct nfs4_lock_state *lsp,
4734 struct nfs_seqid *seqid)
4735{
4736 struct nfs4_unlockdata *data;
5138fde0
TM		 4737 struct rpc_message msg = {
4738 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4739 .rpc_cred = ctx->cred,
4740 };
c970aa85
TM		 4741 struct rpc_task_setup task_setup_data = {
4742 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4743 .rpc_message = &msg,
c970aa85 4744 .callback_ops = &nfs4_locku_ops,
101070ca 4745 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4746 .flags = RPC_TASK_ASYNC,
4747 };
a5d16a4d 4748
137d6aca
FF		 4749 /* Ensure this is an unlock - when canceling a lock, the
4750 * canceled lock is passed in, and it won't be an unlock.
4751 */
4752 fl->fl_type = F_UNLCK;
4753
a5d16a4d
TM		 4754 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4755 if (data == NULL) {
4756 nfs_free_seqid(seqid);
4757 return ERR_PTR(-ENOMEM);
4758 }
4759
9d12b216 4760 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4761 msg.rpc_argp = &data->arg;
4762 msg.rpc_resp = &data->res;
c970aa85
TM		 4763 task_setup_data.callback_data = data;
4764 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4765}
4766
faf5f49c
TM		 4767static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4768{
65b62a29
TM		 4769 struct inode *inode = state->inode;
4770 struct nfs4_state_owner *sp = state->owner;
4771 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 4772 struct nfs_seqid *seqid;
1da177e4 4773 struct nfs4_lock_state *lsp;
06f814a3
TM		 4774 struct rpc_task *task;
4775 int status = 0;
536ff0f8 4776 unsigned char fl_flags = request->fl_flags;
faf5f49c 4777
8d0a8a9d 4778 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4779 /* Unlock _before_ we do the RPC call */
4780 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 4781 /* Exclude nfs_delegation_claim_locks() */
4782 mutex_lock(&sp->so_delegreturn_mutex);
4783 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 4784 down_read(&nfsi->rwsem);
4785 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4786 up_read(&nfsi->rwsem);
65b62a29 4787 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 4788 goto out;
19e03c57
TM		 4789 }
4790 up_read(&nfsi->rwsem);
65b62a29 4791 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 4792 if (status != 0)
9b073574
TM		 4793 goto out;
4794 /* Is this a delegated lock? */
8d0a8a9d 4795 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 4796 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
4797 goto out;
8535b2be 4798 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4799 status = -ENOMEM;
911d1aaf 4800 if (seqid == NULL)
9b073574 4801 goto out;
cd3758e3 4802 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4803 status = PTR_ERR(task);
4804 if (IS_ERR(task))
9b073574 4805 goto out;
a5d16a4d 4806 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4807 rpc_put_task(task);
9b073574 4808out:
536ff0f8 4809 request->fl_flags = fl_flags;
1da177e4
LT		 4810 return status;
4811}
4812
a5d16a4d
TM		 4813struct nfs4_lockdata {
4814 struct nfs_lock_args arg;
4815 struct nfs_lock_res res;
4816 struct nfs4_lock_state *lsp;
4817 struct nfs_open_context *ctx;
4818 struct file_lock fl;
26e976a8 4819 unsigned long timestamp;
a5d16a4d
TM		 4820 int rpc_status;
4821 int cancelled;
66179efe 4822 struct nfs_server *server;
a5d16a4d
TM		 4823};
4824
4825static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4826 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4827 gfp_t gfp_mask)
1da177e4 4828{
a5d16a4d
TM		 4829 struct nfs4_lockdata *p;
4830 struct inode *inode = lsp->ls_state->inode;
1da177e4 4831 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4832
8535b2be 4833 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4834 if (p == NULL)
4835 return NULL;
4836
4837 p->arg.fh = NFS_FH(inode);
4838 p->arg.fl = &p->fl;
8535b2be 4839 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4840 if (p->arg.open_seqid == NULL)
4841 goto out_free;
8535b2be 4842 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4843 if (p->arg.lock_seqid == NULL)
2f74c0a0 4844 goto out_free_seqid;
a5d16a4d 4845 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4846 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4847 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4848 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4849 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4850 p->lsp = lsp;
66179efe 4851 p->server = server;
a5d16a4d
TM		 4852 atomic_inc(&lsp->ls_count);
4853 p->ctx = get_nfs_open_context(ctx);
4854 memcpy(&p->fl, fl, sizeof(p->fl));
4855 return p;
2f74c0a0
TM		 4856out_free_seqid:
4857 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4858out_free:
4859 kfree(p);
4860 return NULL;
4861}
4862
4863static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4864{
4865 struct nfs4_lockdata *data = calldata;
4866 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4867
3110ff80 4868 dprintk("%s: begin!\n", __func__);
2f74c0a0 4869 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 4870 goto out_wait;
a5d16a4d
TM		 4871 /* Do we need to do an open_to_lock_owner? */
4872 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4873 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4874 goto out_release_lock_seqid;
8fe72bac 4875 }
8e472f33 4876 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 4877 data->arg.new_lock_owner = 1;
c1d51931 4878 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4879 } else
4880 data->arg.new_lock_owner = 0;
5d422301
TM		 4881 if (!nfs4_valid_open_stateid(state)) {
4882 data->rpc_status = -EBADF;
4883 task->tk_action = NULL;
4884 goto out_release_open_seqid;
4885 }
26e976a8 4886 data->timestamp = jiffies;
035168ab
TM		 4887 if (nfs4_setup_sequence(data->server,
4888 &data->arg.seq_args,
2240a9e2 4889 &data->res.seq_res,
d9afbd1b 4890 task) == 0)
66179efe 4891 return;
5d422301 4892out_release_open_seqid:
2240a9e2
TM		 4893 nfs_release_seqid(data->arg.open_seqid);
4894out_release_lock_seqid:
4895 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 4896out_wait:
4897 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 4898 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4899}
4900
a5d16a4d
TM		 4901static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4902{
4903 struct nfs4_lockdata *data = calldata;
4904
3110ff80 4905 dprintk("%s: begin!\n", __func__);
a5d16a4d 4906
14516c3a
TM		 4907 if (!nfs4_sequence_done(task, &data->res.seq_res))
4908 return;
66179efe 4909
a5d16a4d 4910 data->rpc_status = task->tk_status;
a5d16a4d 4911 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4912 if (data->rpc_status == 0)
4913 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4914 else
4915 goto out;
4916 }
4917 if (data->rpc_status == 0) {
f597c537 4918 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4919 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4920 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4921 }
a5d16a4d 4922out:
3110ff80 4923 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4924}
4925
4926static void nfs4_lock_release(void *calldata)
4927{
4928 struct nfs4_lockdata *data = calldata;
4929
3110ff80 4930 dprintk("%s: begin!\n", __func__);
2f74c0a0 4931 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4932 if (data->cancelled != 0) {
4933 struct rpc_task *task;
4934 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4935 data->arg.lock_seqid);
4936 if (!IS_ERR(task))
bf294b41 4937 rpc_put_task_async(task);
3110ff80 4938 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4939 } else
4940 nfs_free_seqid(data->arg.lock_seqid);
4941 nfs4_put_lock_state(data->lsp);
4942 put_nfs_open_context(data->ctx);
4943 kfree(data);
3110ff80 4944 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4945}
4946
4947static const struct rpc_call_ops nfs4_lock_ops = {
4948 .rpc_call_prepare = nfs4_lock_prepare,
4949 .rpc_call_done = nfs4_lock_done,
4950 .rpc_release = nfs4_lock_release,
4951};
4952
2bee72a6
TM		 4953static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4954{
2bee72a6
TM		 4955 switch (error) {
4956 case -NFS4ERR_ADMIN_REVOKED:
4957 case -NFS4ERR_BAD_STATEID:
ecac799a 4958 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4959 if (new_lock_owner != 0 ||
795a88c9 4960 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4961 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4962 break;
4963 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4964 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4965 case -NFS4ERR_EXPIRED:
4966 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4967 };
4968}
4969
afe6c27c 4970static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4971{
4972 struct nfs4_lockdata *data;
4973 struct rpc_task *task;
5138fde0
TM		 4974 struct rpc_message msg = {
4975 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4976 .rpc_cred = state->owner->so_cred,
4977 };
c970aa85
TM		 4978 struct rpc_task_setup task_setup_data = {
4979 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4980 .rpc_message = &msg,
c970aa85 4981 .callback_ops = &nfs4_lock_ops,
101070ca 4982 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4983 .flags = RPC_TASK_ASYNC,
4984 };
a5d16a4d
TM		 4985 int ret;
4986
3110ff80 4987 dprintk("%s: begin!\n", __func__);
cd3758e3 4988 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4989 fl->fl_u.nfs4_fl.owner,
4990 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4991 if (data == NULL)
4992 return -ENOMEM;
4993 if (IS_SETLKW(cmd))
4994 data->arg.block = 1;
9d12b216 4995 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4996 msg.rpc_argp = &data->arg;
4997 msg.rpc_resp = &data->res;
c970aa85 4998 task_setup_data.callback_data = data;
8fe72bac
TM		 4999 if (recovery_type > NFS_LOCK_NEW) {
5000 if (recovery_type == NFS_LOCK_RECLAIM)
5001 data->arg.reclaim = NFS_LOCK_RECLAIM;
5002 nfs4_set_sequence_privileged(&data->arg.seq_args);
5003 }
c970aa85 5004 task = rpc_run_task(&task_setup_data);
7a1218a2 5005 if (IS_ERR(task))
a5d16a4d 5006 return PTR_ERR(task);
a5d16a4d
TM		 5007 ret = nfs4_wait_for_completion_rpc_task(task);
5008 if (ret == 0) {
5009 ret = data->rpc_status;
2bee72a6
TM		 5010 if (ret)
5011 nfs4_handle_setlk_error(data->server, data->lsp,
5012 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5013 } else
5014 data->cancelled = 1;
e6b3c4db 5015 rpc_put_task(task);
3110ff80 5016 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5017 return ret;
1da177e4
LT		 5018}
5019
5020static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5021{
202b50dc 5022 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5023 struct nfs4_exception exception = {
5024 .inode = state->inode,
5025 };
202b50dc
TM		 5026 int err;
5027
5028 do {
42a2d13e
TM		 5029 /* Cache the lock if possible... */
5030 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5031 return 0;
afe6c27c 5032 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 5033 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5034 break;
5035 nfs4_handle_exception(server, err, &exception);
5036 } while (exception.retry);
5037 return err;
1da177e4
LT		 5038}
5039
5040static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5041{
202b50dc 5042 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5043 struct nfs4_exception exception = {
5044 .inode = state->inode,
5045 };
202b50dc
TM		 5046 int err;
5047
6bfc93ef
TM		 5048 err = nfs4_set_lock_state(state, request);
5049 if (err != 0)
5050 return err;
202b50dc 5051 do {
42a2d13e
TM		 5052 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5053 return 0;
afe6c27c 5054 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 5055 switch (err) {
5056 default:
5057 goto out;
5058 case -NFS4ERR_GRACE:
5059 case -NFS4ERR_DELAY:
5060 nfs4_handle_exception(server, err, &exception);
5061 err = 0;
5062 }
202b50dc 5063 } while (exception.retry);
a9ed2e25 5064out:
202b50dc 5065 return err;
1da177e4
LT		 5066}
5067
f062eb6c 5068#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5069/**
5070 * nfs41_check_expired_locks - possibly free a lock stateid
5071 *
5072 * @state: NFSv4 state for an inode
5073 *
5074 * Returns NFS_OK if recovery for this stateid is now finished.
5075 * Otherwise a negative NFS4ERR value is returned.
5076 */
b01dd1d8 5077static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5078{
eb64cf96 5079 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5080 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5081 struct nfs_server *server = NFS_SERVER(state->inode);
5082
b01dd1d8 5083 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5084 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 5085 status = nfs41_test_stateid(server, &lsp->ls_stateid);
5086 if (status != NFS_OK) {
3e60ffdd
CL		 5087 /* Free the stateid unless the server
5088 * informs us the stateid is unrecognized. */
89af2739
CL		 5089 if (status != -NFS4ERR_BAD_STATEID)
5090 nfs41_free_stateid(server,
5091 &lsp->ls_stateid);
795a88c9 5092 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5093 ret = status;
5094 }
5095 }
5096 };
5097
5098 return ret;
5099}
5100
5101static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5102{
5103 int status = NFS_OK;
5104
5105 if (test_bit(LK_STATE_IN_USE, &state->flags))
5106 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5107 if (status != NFS_OK)
5108 status = nfs4_lock_expired(state, request);
5109 return status;
f062eb6c
BS		 5110}
5111#endif
5112
1da177e4
LT		 5113static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5114{
9a99af49 5115 struct nfs4_state_owner *sp = state->owner;
19e03c57 5116 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5117 unsigned char fl_flags = request->fl_flags;
9a99af49 5118 unsigned int seq;
8e469ebd 5119 int status = -ENOLCK;
1da177e4 5120
8e469ebd
TM		 5121 if ((fl_flags & FL_POSIX) &&
5122 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5123 goto out;
6bfc93ef 5124 /* Is this a delegated open? */
6bfc93ef
TM		 5125 status = nfs4_set_lock_state(state, request);
5126 if (status != 0)
5127 goto out;
01c3b861
TM		 5128 request->fl_flags |= FL_ACCESS;
5129 status = do_vfs_lock(request->fl_file, request);
5130 if (status < 0)
5131 goto out;
19e03c57 5132 down_read(&nfsi->rwsem);
01c3b861 5133 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5134 /* Yes: cache locks! */
01c3b861 5135 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5136 request->fl_flags = fl_flags & ~FL_SLEEP;
5137 status = do_vfs_lock(request->fl_file, request);
5138 goto out_unlock;
01c3b861 5139 }
9a99af49
TM		 5140 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5141 up_read(&nfsi->rwsem);
afe6c27c 5142 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5143 if (status != 0)
9a99af49
TM		 5144 goto out;
5145 down_read(&nfsi->rwsem);
5146 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5147 status = -NFS4ERR_DELAY;
01c3b861 5148 goto out_unlock;
9a99af49 5149 }
6bfc93ef 5150 /* Note: we always want to sleep here! */
01c3b861 5151 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5152 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5153 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5154 "manager!\n", __func__);
01c3b861 5155out_unlock:
19e03c57 5156 up_read(&nfsi->rwsem);
01c3b861
TM		 5157out:
5158 request->fl_flags = fl_flags;
1da177e4
LT		 5159 return status;
5160}
5161
5162static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5163{
a1d0b5ee
TM		 5164 struct nfs4_exception exception = {
5165 .state = state,
05ffe24f 5166 .inode = state->inode,
a1d0b5ee 5167 };
1da177e4
LT		 5168 int err;
5169
5170 do {
965b5d67
TM		 5171 err = _nfs4_proc_setlk(state, cmd, request);
5172 if (err == -NFS4ERR_DENIED)
5173 err = -EAGAIN;
1da177e4 5174 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5175 err, &exception);
1da177e4
LT		 5176 } while (exception.retry);
5177 return err;
5178}
5179
5180static int
5181nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5182{
5183 struct nfs_open_context *ctx;
5184 struct nfs4_state *state;
5185 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5186 int status;
5187
5188 /* verify open state */
cd3758e3 5189 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5190 state = ctx->state;
5191
5192 if (request->fl_start < 0 || request->fl_end < 0)
5193 return -EINVAL;
5194
d953126a
TM		 5195 if (IS_GETLK(cmd)) {
5196 if (state != NULL)
5197 return nfs4_proc_getlk(state, F_GETLK, request);
5198 return 0;
5199 }
1da177e4
LT		 5200
5201 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5202 return -EINVAL;
5203
d953126a
TM		 5204 if (request->fl_type == F_UNLCK) {
5205 if (state != NULL)
5206 return nfs4_proc_unlck(state, cmd, request);
5207 return 0;
5208 }
1da177e4 5209
d953126a
TM		 5210 if (state == NULL)
5211 return -ENOLCK;
55725513
TM		 5212 /*
5213 * Don't rely on the VFS having checked the file open mode,
5214 * since it won't do this for flock() locks.
5215 */
f44106e2 5216 switch (request->fl_type) {
55725513
TM		 5217 case F_RDLCK:
5218 if (!(filp->f_mode & FMODE_READ))
5219 return -EBADF;
5220 break;
5221 case F_WRLCK:
5222 if (!(filp->f_mode & FMODE_WRITE))
5223 return -EBADF;
5224 }
5225
1da177e4
LT		 5226 do {
5227 status = nfs4_proc_setlk(state, cmd, request);
5228 if ((status != -EAGAIN) || IS_SETLK(cmd))
5229 break;
5230 timeout = nfs4_set_lock_task_retry(timeout);
5231 status = -ERESTARTSYS;
5232 if (signalled())
5233 break;
5234 } while(status < 0);
1da177e4
LT		 5235 return status;
5236}
5237
db4f2e63 5238int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5239{
5240 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5241 int err;
5242
5243 err = nfs4_set_lock_state(state, fl);
5244 if (err != 0)
db4f2e63 5245 return err;
4a706fa0 5246 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5247 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5248}
6b3b5496 5249
cf470c3e
TM		 5250struct nfs_release_lockowner_data {
5251 struct nfs4_lock_state *lsp;
5ae67c4f 5252 struct nfs_server *server;
cf470c3e
TM		 5253 struct nfs_release_lockowner_args args;
5254};
5255
d3c7b7cc
TM		 5256static void nfs4_release_lockowner_release(void *calldata)
5257{
cf470c3e 5258 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5259 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5260 kfree(calldata);
5261}
5262
17280175 5263static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5264 .rpc_release = nfs4_release_lockowner_release,
5265};
5266
c8b2d0bf 5267static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5268{
cf470c3e 5269 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5270 struct rpc_message msg = {
5271 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5272 };
5273
5274 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5275 return -EINVAL;
5276 data = kmalloc(sizeof(*data), GFP_NOFS);
5277 if (!data)
5278 return -ENOMEM;
5279 data->lsp = lsp;
5ae67c4f 5280 data->server = server;
cf470c3e
TM		 5281 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5282 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5283 data->args.lock_owner.s_dev = server->s_dev;
5284 msg.rpc_argp = &data->args;
5285 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5286 return 0;
d3c7b7cc
TM		 5287}
5288
aa1870af
BF		 5289#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5290
64c2ce8b
AK		 5291static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5292 const void *buf, size_t buflen,
5293 int flags, int type)
6b3b5496 5294{
64c2ce8b
AK		 5295 if (strcmp(key, "") != 0)
5296 return -EINVAL;
4b580ee3 5297
64c2ce8b 5298 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5299}
5300
64c2ce8b
AK		 5301static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5302 void *buf, size_t buflen, int type)
6b3b5496 5303{
64c2ce8b
AK		 5304 if (strcmp(key, "") != 0)
5305 return -EINVAL;
aa1870af 5306
64c2ce8b 5307 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5308}
5309
64c2ce8b
AK		 5310static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5311 size_t list_len, const char *name,
5312 size_t name_len, int type)
6b3b5496 5313{
64c2ce8b 5314 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5315
096455a2
BF		 5316 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5317 return 0;
64c2ce8b
AK		 5318
5319 if (list && len <= list_len)
5320 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5321 return len;
6b3b5496
BF		 5322}
5323
533eb461
AA		 5324/*
5325 * nfs_fhget will use either the mounted_on_fileid or the fileid
5326 */
69aaaae1
TM		 5327static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5328{
533eb461
AA		 5329 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5330 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5331 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5332 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5333 return;
5334
5335 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5336 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5337 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5338 fattr->nlink = 2;
5339}
5340
f05d147f
BS		 5341static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5342 const struct qstr *name,
5343 struct nfs4_fs_locations *fs_locations,
5344 struct page *page)
683b57b4
TM		 5345{
5346 struct nfs_server *server = NFS_SERVER(dir);
5347 u32 bitmask[2] = {
361e624f 5348 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5349 };
5350 struct nfs4_fs_locations_arg args = {
5351 .dir_fh = NFS_FH(dir),
c228fd3a 5352 .name = name,
683b57b4
TM		 5353 .page = page,
5354 .bitmask = bitmask,
5355 };
22958463
BH		 5356 struct nfs4_fs_locations_res res = {
5357 .fs_locations = fs_locations,
5358 };
683b57b4
TM		 5359 struct rpc_message msg = {
5360 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5361 .rpc_argp = &args,
22958463 5362 .rpc_resp = &res,
683b57b4
TM		 5363 };
5364 int status;
5365
3110ff80 5366 dprintk("%s: start\n", __func__);
533eb461
AA		 5367
5368 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5369 * is not supported */
5370 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5371 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5372 else
5373 bitmask[0] |= FATTR4_WORD0_FILEID;
5374
c228fd3a 5375 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5376 fs_locations->server = server;
830b8e33 5377 fs_locations->nlocations = 0;
f05d147f 5378 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5379 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5380 return status;
5381}
5382
f05d147f
BS		 5383int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5384 const struct qstr *name,
5385 struct nfs4_fs_locations *fs_locations,
5386 struct page *page)
db0a9593
BS		 5387{
5388 struct nfs4_exception exception = { };
5389 int err;
5390 do {
5391 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5392 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5393 &exception);
5394 } while (exception.retry);
5395 return err;
5396}
5397
5a5ea0d4
BS		 5398static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5399{
5400 int status;
5401 struct nfs4_secinfo_arg args = {
5402 .dir_fh = NFS_FH(dir),
5403 .name = name,
5404 };
5405 struct nfs4_secinfo_res res = {
5406 .flavors = flavors,
5407 };
5408 struct rpc_message msg = {
5409 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5410 .rpc_argp = &args,
5411 .rpc_resp = &res,
5412 };
5413
5414 dprintk("NFS call secinfo %s\n", name->name);
5415 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5416 dprintk("NFS reply secinfo: %d\n", status);
5417 return status;
5418}
5419
72de53ec
BS		 5420int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5421 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5422{
5423 struct nfs4_exception exception = { };
5424 int err;
5425 do {
5426 err = nfs4_handle_exception(NFS_SERVER(dir),
5427 _nfs4_proc_secinfo(dir, name, flavors),
5428 &exception);
5429 } while (exception.retry);
5430 return err;
5431}
5432
557134a3 5433#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5434/*
5435 * Check the exchange flags returned by the server for invalid flags, having
5436 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5437 * DS flags set.
5438 */
5439static int nfs4_check_cl_exchange_flags(u32 flags)
5440{
5441 if (flags & ~EXCHGID4_FLAG_MASK_R)
5442 goto out_inval;
5443 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5444 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5445 goto out_inval;
5446 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5447 goto out_inval;
5448 return NFS_OK;
5449out_inval:
5450 return -NFS4ERR_INVAL;
5451}
5452
78fe0f41 5453static bool
79d4e1f0
CL		 5454nfs41_same_server_scope(struct nfs41_server_scope *a,
5455 struct nfs41_server_scope *b)
78fe0f41
WAA		 5456{
5457 if (a->server_scope_sz == b->server_scope_sz &&
5458 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5459 return true;
5460
5461 return false;
5462}
5463
7c44f1ae
WAA		 5464/*
5465 * nfs4_proc_bind_conn_to_session()
5466 *
5467 * The 4.1 client currently uses the same TCP connection for the
5468 * fore and backchannel.
5469 */
2cf047c9 5470int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5471{
5472 int status;
5473 struct nfs41_bind_conn_to_session_res res;
5474 struct rpc_message msg = {
5475 .rpc_proc =
5476 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5477 .rpc_argp = clp,
5478 .rpc_resp = &res,
2cf047c9 5479 .rpc_cred = cred,
7c44f1ae
WAA		 5480 };
5481
5482 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5483
5484 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5485 if (unlikely(res.session == NULL)) {
5486 status = -ENOMEM;
5487 goto out;
5488 }
5489
5490 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5491 if (status == 0) {
5492 if (memcmp(res.session->sess_id.data,
5493 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5494 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5495 status = -EIO;
5496 goto out_session;
5497 }
5498 if (res.dir != NFS4_CDFS4_BOTH) {
5499 dprintk("NFS: %s: Unexpected direction from server\n",
5500 __func__);
5501 status = -EIO;
5502 goto out_session;
5503 }
5504 if (res.use_conn_in_rdma_mode) {
5505 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5506 __func__);
5507 status = -EIO;
5508 goto out_session;
5509 }
5510 }
5511out_session:
5512 kfree(res.session);
5513out:
5514 dprintk("<-- %s status= %d\n", __func__, status);
5515 return status;
5516}
5517
99fe60d0
BH		 5518/*
5519 * nfs4_proc_exchange_id()
5520 *
6bbb4ae8
CL		 5521 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5522 *
99fe60d0
BH		 5523 * Since the clientid has expired, all compounds using sessions
5524 * associated with the stale clientid will be returning
5525 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5526 * be in some phase of session reset.
5527 */
4d643d1d 5528int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5529{
5530 nfs4_verifier verifier;
5531 struct nfs41_exchange_id_args args = {
cd93710e 5532 .verifier = &verifier,
99fe60d0 5533 .client = clp,
357f54d6 5534 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5535 };
5536 struct nfs41_exchange_id_res res = {
32b01310 5537 0
99fe60d0
BH		 5538 };
5539 int status;
5540 struct rpc_message msg = {
5541 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5542 .rpc_argp = &args,
5543 .rpc_resp = &res,
5544 .rpc_cred = cred,
5545 };
99fe60d0 5546
f092075d 5547 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5548 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5549 sizeof(args.id));
6bbb4ae8
CL		 5550 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5551 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5552 args.id_len, args.id);
99fe60d0 5553
acdeb69d 5554 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5555 GFP_NOFS);
acdeb69d 5556 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5557 status = -ENOMEM;
5558 goto out;
5559 }
78fe0f41 5560
79d4e1f0 5561 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5562 GFP_NOFS);
177313f1 5563 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5564 status = -ENOMEM;
acdeb69d 5565 goto out_server_owner;
abe9a6d5 5566 }
78fe0f41 5567
bbafffd2 5568 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5569 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5570 status = -ENOMEM;
5571 goto out_server_scope;
5572 }
5573
1bd714f2 5574 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5575 if (status == 0)
32b01310 5576 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5577
acdeb69d 5578 if (status == 0) {
32b01310
TM		 5579 clp->cl_clientid = res.clientid;
5580 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5581 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5582 clp->cl_seqid = res.seqid;
5583
acdeb69d
CL		 5584 kfree(clp->cl_serverowner);
5585 clp->cl_serverowner = res.server_owner;
5586 res.server_owner = NULL;
78fe0f41 5587
7d2ed9ac 5588 /* use the most recent implementation id */
59155546
CL		 5589 kfree(clp->cl_implid);
5590 clp->cl_implid = res.impl_id;
7d2ed9ac 5591
177313f1 5592 if (clp->cl_serverscope != NULL &&
79d4e1f0 5593 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5594 res.server_scope)) {
5595 dprintk("%s: server_scope mismatch detected\n",
5596 __func__);
5597 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5598 kfree(clp->cl_serverscope);
5599 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5600 }
5601
177313f1 5602 if (clp->cl_serverscope == NULL) {
79d4e1f0 5603 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5604 goto out;
5605 }
32b01310
TM		 5606 } else
5607 kfree(res.impl_id);
7d2ed9ac 5608
acdeb69d
CL		 5609out_server_owner:
5610 kfree(res.server_owner);
7d2ed9ac 5611out_server_scope:
abe9a6d5
WAA		 5612 kfree(res.server_scope);
5613out:
177313f1 5614 if (clp->cl_implid != NULL)
6bbb4ae8 5615 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5616 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5617 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5618 clp->cl_implid->date.seconds,
5619 clp->cl_implid->date.nseconds);
6bbb4ae8 5620 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5621 return status;
5622}
5623
66245539
TM		 5624static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5625 struct rpc_cred *cred)
5626{
5627 struct rpc_message msg = {
5628 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5629 .rpc_argp = clp,
5630 .rpc_cred = cred,
5631 };
5632 int status;
5633
5634 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5635 if (status)
02c67525 5636 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5637 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5638 return status;
5639}
5640
5641static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5642 struct rpc_cred *cred)
5643{
5644 unsigned int loop;
5645 int ret;
5646
5647 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5648 ret = _nfs4_proc_destroy_clientid(clp, cred);
5649 switch (ret) {
5650 case -NFS4ERR_DELAY:
5651 case -NFS4ERR_CLIENTID_BUSY:
5652 ssleep(1);
5653 break;
5654 default:
5655 return ret;
5656 }
5657 }
5658 return 0;
5659}
5660
5661int nfs4_destroy_clientid(struct nfs_client *clp)
5662{
5663 struct rpc_cred *cred;
5664 int ret = 0;
5665
5666 if (clp->cl_mvops->minor_version < 1)
5667 goto out;
5668 if (clp->cl_exchange_flags == 0)
5669 goto out;
05f4c350
CL		 5670 if (clp->cl_preserve_clid)
5671 goto out;
66245539
TM		 5672 cred = nfs4_get_exchange_id_cred(clp);
5673 ret = nfs4_proc_destroy_clientid(clp, cred);
5674 if (cred)
5675 put_rpccred(cred);
5676 switch (ret) {
5677 case 0:
5678 case -NFS4ERR_STALE_CLIENTID:
5679 clp->cl_exchange_flags = 0;
5680 }
5681out:
5682 return ret;
5683}
5684
2050f0cc
AA		 5685struct nfs4_get_lease_time_data {
5686 struct nfs4_get_lease_time_args *args;
5687 struct nfs4_get_lease_time_res *res;
5688 struct nfs_client *clp;
5689};
5690
5691static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5692 void *calldata)
5693{
2050f0cc
AA		 5694 struct nfs4_get_lease_time_data *data =
5695 (struct nfs4_get_lease_time_data *)calldata;
5696
5697 dprintk("--> %s\n", __func__);
5698 /* just setup sequence, do not trigger session recovery
5699 since we're invoked within one */
d9afbd1b
TM		 5700 nfs41_setup_sequence(data->clp->cl_session,
5701 &data->args->la_seq_args,
5702 &data->res->lr_seq_res,
5703 task);
2050f0cc
AA		 5704 dprintk("<-- %s\n", __func__);
5705}
5706
5707/*
5708 * Called from nfs4_state_manager thread for session setup, so don't recover
5709 * from sequence operation or clientid errors.
5710 */
5711static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5712{
5713 struct nfs4_get_lease_time_data *data =
5714 (struct nfs4_get_lease_time_data *)calldata;
5715
5716 dprintk("--> %s\n", __func__);
14516c3a
TM		 5717 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5718 return;
2050f0cc
AA		 5719 switch (task->tk_status) {
5720 case -NFS4ERR_DELAY:
5721 case -NFS4ERR_GRACE:
5722 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5723 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5724 task->tk_status = 0;
a8a4ae3a
AA		 5725 /* fall through */
5726 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5727 rpc_restart_call_prepare(task);
2050f0cc
AA		 5728 return;
5729 }
2050f0cc
AA		 5730 dprintk("<-- %s\n", __func__);
5731}
5732
17280175 5733static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5734 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5735 .rpc_call_done = nfs4_get_lease_time_done,
5736};
5737
5738int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5739{
5740 struct rpc_task *task;
5741 struct nfs4_get_lease_time_args args;
5742 struct nfs4_get_lease_time_res res = {
5743 .lr_fsinfo = fsinfo,
5744 };
5745 struct nfs4_get_lease_time_data data = {
5746 .args = &args,
5747 .res = &res,
5748 .clp = clp,
5749 };
5750 struct rpc_message msg = {
5751 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5752 .rpc_argp = &args,
5753 .rpc_resp = &res,
5754 };
5755 struct rpc_task_setup task_setup = {
5756 .rpc_client = clp->cl_rpcclient,
5757 .rpc_message = &msg,
5758 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5759 .callback_data = &data,
5760 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5761 };
5762 int status;
5763
9d12b216 5764 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5765 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5766 dprintk("--> %s\n", __func__);
5767 task = rpc_run_task(&task_setup);
5768
5769 if (IS_ERR(task))
5770 status = PTR_ERR(task);
5771 else {
5772 status = task->tk_status;
5773 rpc_put_task(task);
5774 }
5775 dprintk("<-- %s return %d\n", __func__, status);
5776
5777 return status;
5778}
5779
fc931582
AA		 5780/*
5781 * Initialize the values to be used by the client in CREATE_SESSION
5782 * If nfs4_init_session set the fore channel request and response sizes,
5783 * use them.
5784 *
5785 * Set the back channel max_resp_sz_cached to zero to force the client to
5786 * always set csa_cachethis to FALSE because the current implementation
5787 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5788 */
5789static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5790{
5791 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5792 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5793 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5794
5795 if (mxrqst_sz == 0)
5796 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5797 if (mxresp_sz == 0)
5798 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5799 /* Fore channel attributes */
fc931582
AA		 5800 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5801 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5802 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5803 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5804
5805 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5806 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5807 __func__,
5808 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5809 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5810
5811 /* Back channel attributes */
fc931582
AA		 5812 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5813 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5814 args->bc_attrs.max_resp_sz_cached = 0;
5815 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5816 args->bc_attrs.max_reqs = 1;
5817
5818 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5819 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5820 __func__,
5821 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5822 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5823 args->bc_attrs.max_reqs);
5824}
5825
43c2e885 5826static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5827{
43c2e885
BF		 5828 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5829 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5830
43c2e885
BF		 5831 if (rcvd->max_resp_sz > sent->max_resp_sz)
5832 return -EINVAL;
5833 /*
5834 * Our requested max_ops is the minimum we need; we're not
5835 * prepared to break up compounds into smaller pieces than that.
5836 * So, no point even trying to continue if the server won't
5837 * cooperate:
5838 */
5839 if (rcvd->max_ops < sent->max_ops)
5840 return -EINVAL;
5841 if (rcvd->max_reqs == 0)
5842 return -EINVAL;
b4b9a0c1
VG		 5843 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5844 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5845 return 0;
8d35301d
AA		 5846}
5847
43c2e885
BF		 5848static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5849{
5850 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5851 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5852
43c2e885
BF		 5853 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5854 return -EINVAL;
5855 if (rcvd->max_resp_sz < sent->max_resp_sz)
5856 return -EINVAL;
5857 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5858 return -EINVAL;
5859 /* These would render the backchannel useless: */
b4b9a0c1 5860 if (rcvd->max_ops != sent->max_ops)
43c2e885 5861 return -EINVAL;
b4b9a0c1 5862 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5863 return -EINVAL;
5864 return 0;
5865}
8d35301d 5866
8d35301d
AA		 5867static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5868 struct nfs4_session *session)
5869{
43c2e885 5870 int ret;
8d35301d 5871
43c2e885
BF		 5872 ret = nfs4_verify_fore_channel_attrs(args, session);
5873 if (ret)
5874 return ret;
5875 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5876}
5877
848f5bda
TM		 5878static int _nfs4_proc_create_session(struct nfs_client *clp,
5879 struct rpc_cred *cred)
fc931582
AA		 5880{
5881 struct nfs4_session *session = clp->cl_session;
5882 struct nfs41_create_session_args args = {
5883 .client = clp,
5884 .cb_program = NFS4_CALLBACK,
5885 };
5886 struct nfs41_create_session_res res = {
5887 .client = clp,
5888 };
5889 struct rpc_message msg = {
5890 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5891 .rpc_argp = &args,
5892 .rpc_resp = &res,
848f5bda 5893 .rpc_cred = cred,
fc931582
AA		 5894 };
5895 int status;
5896
5897 nfs4_init_channel_attrs(&args);
0f91421e 5898 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5899
1bd714f2 5900 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5901
43095d39 5902 if (!status) {
8d35301d
AA		 5903 /* Verify the session's negotiated channel_attrs values */
5904 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5905 /* Increment the clientid slot sequence id */
5906 clp->cl_seqid++;
5907 }
5908
5909 return status;
5910}
5911
5912/*
5913 * Issues a CREATE_SESSION operation to the server.
5914 * It is the responsibility of the caller to verify the session is
5915 * expired before calling this routine.
5916 */
848f5bda 5917int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5918{
5919 int status;
5920 unsigned *ptr;
fc931582
AA		 5921 struct nfs4_session *session = clp->cl_session;
5922
5923 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5924
848f5bda 5925 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5926 if (status)
5927 goto out;
5928
aacd5537
AA		 5929 /* Init or reset the session slot tables */
5930 status = nfs4_setup_session_slot_tables(session);
5931 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5932 if (status)
5933 goto out;
5934
5935 ptr = (unsigned *)&session->sess_id.data[0];
5936 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5937 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5938out:
5939 dprintk("<-- %s\n", __func__);
5940 return status;
5941}
5942
0f3e66c6
AA		 5943/*
5944 * Issue the over-the-wire RPC DESTROY_SESSION.
5945 * The caller must serialize access to this routine.
5946 */
848f5bda
TM		 5947int nfs4_proc_destroy_session(struct nfs4_session *session,
5948 struct rpc_cred *cred)
0f3e66c6 5949{
848f5bda
TM		 5950 struct rpc_message msg = {
5951 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5952 .rpc_argp = session,
5953 .rpc_cred = cred,
5954 };
0f3e66c6 5955 int status = 0;
0f3e66c6
AA		 5956
5957 dprintk("--> nfs4_proc_destroy_session\n");
5958
5959 /* session is still being setup */
5960 if (session->clp->cl_cons_state != NFS_CS_READY)
5961 return status;
5962
1bd714f2 5963 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5964
5965 if (status)
08106ac7 5966 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5967 "Session has been destroyed regardless...\n", status);
5968
5969 dprintk("<-- nfs4_proc_destroy_session\n");
5970 return status;
5971}
5972
fc01cea9
AA		 5973/*
5974 * Renew the cl_session lease.
5975 */
d5f8d3fe
TM		 5976struct nfs4_sequence_data {
5977 struct nfs_client *clp;
5978 struct nfs4_sequence_args args;
5979 struct nfs4_sequence_res res;
5980};
5981
dc96aef9
AB		 5982static void nfs41_sequence_release(void *data)
5983{
d5f8d3fe
TM		 5984 struct nfs4_sequence_data *calldata = data;
5985 struct nfs_client *clp = calldata->clp;
dc96aef9 5986
7135840f
AB		 5987 if (atomic_read(&clp->cl_count) > 1)
5988 nfs4_schedule_state_renewal(clp);
5989 nfs_put_client(clp);
d5f8d3fe 5990 kfree(calldata);
dc96aef9
AB		 5991}
5992
aa5190d0
TM		 5993static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5994{
5995 switch(task->tk_status) {
5996 case -NFS4ERR_DELAY:
aa5190d0
TM		 5997 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5998 return -EAGAIN;
5999 default:
0400a6b0 6000 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6001 }
6002 return 0;
6003}
6004
dc96aef9 6005static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 6006{
d5f8d3fe
TM		 6007 struct nfs4_sequence_data *calldata = data;
6008 struct nfs_client *clp = calldata->clp;
fc01cea9 6009
14516c3a
TM		 6010 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6011 return;
fc01cea9
AA		 6012
6013 if (task->tk_status < 0) {
6014 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 6015 if (atomic_read(&clp->cl_count) == 1)
6016 goto out;
fc01cea9 6017
aa5190d0
TM		 6018 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6019 rpc_restart_call_prepare(task);
fc01cea9
AA		 6020 return;
6021 }
6022 }
fc01cea9 6023 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6024out:
fc01cea9
AA		 6025 dprintk("<-- %s\n", __func__);
6026}
6027
6028static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6029{
d5f8d3fe
TM		 6030 struct nfs4_sequence_data *calldata = data;
6031 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6032 struct nfs4_sequence_args *args;
6033 struct nfs4_sequence_res *res;
6034
fc01cea9
AA		 6035 args = task->tk_msg.rpc_argp;
6036 res = task->tk_msg.rpc_resp;
6037
d9afbd1b 6038 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 6039}
6040
6041static const struct rpc_call_ops nfs41_sequence_ops = {
6042 .rpc_call_done = nfs41_sequence_call_done,
6043 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6044 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6045};
6046
8fe72bac
TM		 6047static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6048 struct rpc_cred *cred,
6049 bool is_privileged)
fc01cea9 6050{
d5f8d3fe 6051 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6052 struct rpc_message msg = {
6053 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6054 .rpc_cred = cred,
6055 };
71ac6da9
TM		 6056 struct rpc_task_setup task_setup_data = {
6057 .rpc_client = clp->cl_rpcclient,
6058 .rpc_message = &msg,
8fe72bac 6059 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 6060 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 6061 };
fc01cea9 6062
7135840f 6063 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6064 return ERR_PTR(-EIO);
dfb4f309 6065 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6066 if (calldata == NULL) {
7135840f 6067 nfs_put_client(clp);
71ac6da9 6068 return ERR_PTR(-ENOMEM);
fc01cea9 6069 }
9d12b216 6070 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6071 if (is_privileged)
6072 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6073 msg.rpc_argp = &calldata->args;
6074 msg.rpc_resp = &calldata->res;
6075 calldata->clp = clp;
71ac6da9 6076 task_setup_data.callback_data = calldata;
fc01cea9 6077
71ac6da9
TM		 6078 return rpc_run_task(&task_setup_data);
6079}
6080
2f60ea6b 6081static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6082{
6083 struct rpc_task *task;
6084 int ret = 0;
6085
2f60ea6b 6086 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
f2368dcc 6087 return -EAGAIN;
8fe72bac 6088 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6089 if (IS_ERR(task))
6090 ret = PTR_ERR(task);
6091 else
bf294b41 6092 rpc_put_task_async(task);
71ac6da9
TM		 6093 dprintk("<-- %s status=%d\n", __func__, ret);
6094 return ret;
6095}
6096
6097static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6098{
6099 struct rpc_task *task;
6100 int ret;
6101
8fe72bac 6102 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6103 if (IS_ERR(task)) {
6104 ret = PTR_ERR(task);
6105 goto out;
6106 }
6107 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6108 if (!ret) {
6109 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6110
6111 if (task->tk_status == 0)
6112 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6113 ret = task->tk_status;
b4410c2f 6114 }
71ac6da9
TM		 6115 rpc_put_task(task);
6116out:
6117 dprintk("<-- %s status=%d\n", __func__, ret);
6118 return ret;
fc01cea9
AA		 6119}
6120
fce5c838
RL		 6121struct nfs4_reclaim_complete_data {
6122 struct nfs_client *clp;
6123 struct nfs41_reclaim_complete_args arg;
6124 struct nfs41_reclaim_complete_res res;
6125};
6126
6127static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6128{
6129 struct nfs4_reclaim_complete_data *calldata = data;
6130
d9afbd1b
TM		 6131 nfs41_setup_sequence(calldata->clp->cl_session,
6132 &calldata->arg.seq_args,
6133 &calldata->res.seq_res,
6134 task);
fce5c838
RL		 6135}
6136
aa5190d0
TM		 6137static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6138{
6139 switch(task->tk_status) {
6140 case 0:
6141 case -NFS4ERR_COMPLETE_ALREADY:
6142 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6143 break;
6144 case -NFS4ERR_DELAY:
aa5190d0 6145 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6146 /* fall through */
6147 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6148 return -EAGAIN;
6149 default:
0400a6b0 6150 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6151 }
6152 return 0;
6153}
6154
fce5c838
RL		 6155static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6156{
6157 struct nfs4_reclaim_complete_data *calldata = data;
6158 struct nfs_client *clp = calldata->clp;
6159 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6160
6161 dprintk("--> %s\n", __func__);
14516c3a
TM		 6162 if (!nfs41_sequence_done(task, res))
6163 return;
fce5c838 6164
aa5190d0
TM		 6165 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6166 rpc_restart_call_prepare(task);
6167 return;
6168 }
fce5c838
RL		 6169 dprintk("<-- %s\n", __func__);
6170}
6171
6172static void nfs4_free_reclaim_complete_data(void *data)
6173{
6174 struct nfs4_reclaim_complete_data *calldata = data;
6175
6176 kfree(calldata);
6177}
6178
6179static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6180 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6181 .rpc_call_done = nfs4_reclaim_complete_done,
6182 .rpc_release = nfs4_free_reclaim_complete_data,
6183};
6184
6185/*
6186 * Issue a global reclaim complete.
6187 */
6188static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6189{
6190 struct nfs4_reclaim_complete_data *calldata;
6191 struct rpc_task *task;
6192 struct rpc_message msg = {
6193 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6194 };
6195 struct rpc_task_setup task_setup_data = {
6196 .rpc_client = clp->cl_rpcclient,
6197 .rpc_message = &msg,
6198 .callback_ops = &nfs4_reclaim_complete_call_ops,
6199 .flags = RPC_TASK_ASYNC,
6200 };
6201 int status = -ENOMEM;
6202
6203 dprintk("--> %s\n", __func__);
8535b2be 6204 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6205 if (calldata == NULL)
6206 goto out;
6207 calldata->clp = clp;
6208 calldata->arg.one_fs = 0;
fce5c838 6209
9d12b216 6210 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6211 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6212 msg.rpc_argp = &calldata->arg;
6213 msg.rpc_resp = &calldata->res;
6214 task_setup_data.callback_data = calldata;
6215 task = rpc_run_task(&task_setup_data);
acf82b85 6216 if (IS_ERR(task)) {
fce5c838 6217 status = PTR_ERR(task);
acf82b85
DC		 6218 goto out;
6219 }
c34c32ea
AA		 6220 status = nfs4_wait_for_completion_rpc_task(task);
6221 if (status == 0)
6222 status = task->tk_status;
fce5c838 6223 rpc_put_task(task);
acf82b85 6224 return 0;
fce5c838
RL		 6225out:
6226 dprintk("<-- %s status=%d\n", __func__, status);
6227 return status;
6228}
b1f69b75
AA		 6229
6230static void
6231nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6232{
6233 struct nfs4_layoutget *lgp = calldata;
c31663d4 6234 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6235 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6236
6237 dprintk("--> %s\n", __func__);
c31663d4
FI		 6238 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6239 * right now covering the LAYOUTGET we are about to send.
6240 * However, that is not so catastrophic, and there seems
6241 * to be no way to prevent it completely.
6242 */
6ba7db34 6243 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6244 &lgp->res.seq_res, task))
b1f69b75 6245 return;
cf7d63f1
FI		 6246 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6247 NFS_I(lgp->args.inode)->layout,
6248 lgp->args.ctx->state)) {
6249 rpc_exit(task, NFS4_OK);
cf7d63f1 6250 }
b1f69b75
AA		 6251}
6252
6253static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6254{
6255 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6256 struct inode *inode = lgp->args.inode;
6257 struct nfs_server *server = NFS_SERVER(inode);
6258 struct pnfs_layout_hdr *lo;
6259 struct nfs4_state *state = NULL;
305a7c62 6260 unsigned long timeo, now, giveup;
b1f69b75 6261
305a7c62 6262 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 6263
6ba7db34 6264 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6265 goto out;
b1f69b75
AA		 6266
6267 switch (task->tk_status) {
6268 case 0:
ee314c2a 6269 goto out;
305a7c62
BH		 6270 /*
6271 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
6272 * (or clients) writing to the same RAID stripe
6273 */
b1f69b75 6274 case -NFS4ERR_LAYOUTTRYLATER:
305a7c62
BH		 6275 /*
6276 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
6277 * existing layout before getting a new one).
6278 */
b1f69b75 6279 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6280 timeo = rpc_get_timeout(task->tk_client);
6281 giveup = lgp->args.timestamp + timeo;
305a7c62
BH		 6282 now = jiffies;
6283 if (time_after(giveup, now)) {
6284 unsigned long delay;
6285
6286 /* Delay for:
6287 * - Not less then NFS4_POLL_RETRY_MIN.
6288 * - One last time a jiffie before we give up
6289 * - exponential backoff (time_now minus start_attempt)
6290 */
6291 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
6292 min((giveup - now - 1),
6293 now - lgp->args.timestamp));
6294
6295 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
6296 __func__, delay);
6297 rpc_delay(task, delay);
6298 task->tk_status = 0;
6299 rpc_restart_call_prepare(task);
6300 goto out; /* Do not call nfs4_async_handle_error() */
6301 }
ee314c2a
TM		 6302 break;
6303 case -NFS4ERR_EXPIRED:
6304 case -NFS4ERR_BAD_STATEID:
6305 spin_lock(&inode->i_lock);
6306 lo = NFS_I(inode)->layout;
6307 if (!lo || list_empty(&lo->plh_segs)) {
6308 spin_unlock(&inode->i_lock);
6309 /* If the open stateid was bad, then recover it. */
6310 state = lgp->args.ctx->state;
6311 } else {
6312 LIST_HEAD(head);
6313
6314 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6315 spin_unlock(&inode->i_lock);
6316 /* Mark the bad layout state as invalid, then
6317 * retry using the open stateid. */
6318 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6319 }
6320 }
ee314c2a
TM		 6321 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6322 rpc_restart_call_prepare(task);
6323out:
b1f69b75
AA		 6324 dprintk("<-- %s\n", __func__);
6325}
6326
8554116e
IK		 6327static size_t max_response_pages(struct nfs_server *server)
6328{
6329 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6330 return nfs_page_array_len(0, max_resp_sz);
6331}
6332
6333static void nfs4_free_pages(struct page **pages, size_t size)
6334{
6335 int i;
6336
6337 if (!pages)
6338 return;
6339
6340 for (i = 0; i < size; i++) {
6341 if (!pages[i])
6342 break;
6343 __free_page(pages[i]);
6344 }
6345 kfree(pages);
6346}
6347
6348static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6349{
6350 struct page **pages;
6351 int i;
6352
6353 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6354 if (!pages) {
6355 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6356 return NULL;
6357 }
6358
6359 for (i = 0; i < size; i++) {
6360 pages[i] = alloc_page(gfp_flags);
6361 if (!pages[i]) {
6362 dprintk("%s: failed to allocate page\n", __func__);
6363 nfs4_free_pages(pages, size);
6364 return NULL;
6365 }
6366 }
6367
6368 return pages;
6369}
6370
b1f69b75
AA		 6371static void nfs4_layoutget_release(void *calldata)
6372{
6373 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6374 struct inode *inode = lgp->args.inode;
6375 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6376 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6377
6378 dprintk("--> %s\n", __func__);
8554116e 6379 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6380 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6381 put_nfs_open_context(lgp->args.ctx);
6382 kfree(calldata);
6383 dprintk("<-- %s\n", __func__);
6384}
6385
6386static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6387 .rpc_call_prepare = nfs4_layoutget_prepare,
6388 .rpc_call_done = nfs4_layoutget_done,
6389 .rpc_release = nfs4_layoutget_release,
6390};
6391
a0b0a6e3
TM		 6392struct pnfs_layout_segment *
6393nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6394{
a47970ff
WAA		 6395 struct inode *inode = lgp->args.inode;
6396 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6397 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6398 struct rpc_task *task;
6399 struct rpc_message msg = {
6400 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6401 .rpc_argp = &lgp->args,
6402 .rpc_resp = &lgp->res,
6403 };
6404 struct rpc_task_setup task_setup_data = {
6405 .rpc_client = server->client,
6406 .rpc_message = &msg,
6407 .callback_ops = &nfs4_layoutget_call_ops,
6408 .callback_data = lgp,
6409 .flags = RPC_TASK_ASYNC,
6410 };
a0b0a6e3 6411 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6412 int status = 0;
6413
6414 dprintk("--> %s\n", __func__);
6415
f30d637d
PT		 6416 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6417 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6418
8554116e
IK		 6419 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6420 if (!lgp->args.layout.pages) {
6421 nfs4_layoutget_release(lgp);
a0b0a6e3 6422 return ERR_PTR(-ENOMEM);
8554116e
IK		 6423 }
6424 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6425 lgp->args.timestamp = jiffies;
8554116e 6426
35124a09 6427 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6428 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6429 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 6430
b1f69b75
AA		 6431 task = rpc_run_task(&task_setup_data);
6432 if (IS_ERR(task))
a0b0a6e3 6433 return ERR_CAST(task);
b1f69b75 6434 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6435 if (status == 0)
6436 status = task->tk_status;
085b7a45
WAA		 6437 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6438 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6439 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6440 rpc_put_task(task);
6441 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6442 if (status)
6443 return ERR_PTR(status);
6444 return lseg;
b1f69b75
AA		 6445}
6446
cbe82603
BH		 6447static void
6448nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6449{
6450 struct nfs4_layoutreturn *lrp = calldata;
6451
6452 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6453 nfs41_setup_sequence(lrp->clp->cl_session,
6454 &lrp->args.seq_args,
6455 &lrp->res.seq_res,
6456 task);
cbe82603
BH		 6457}
6458
6459static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6460{
6461 struct nfs4_layoutreturn *lrp = calldata;
6462 struct nfs_server *server;
6463
6464 dprintk("--> %s\n", __func__);
6465
6ba7db34 6466 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6467 return;
6468
6469 server = NFS_SERVER(lrp->args.inode);
6470 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6471 rpc_restart_call_prepare(task);
cbe82603
BH		 6472 return;
6473 }
cbe82603
BH		 6474 dprintk("<-- %s\n", __func__);
6475}
6476
6477static void nfs4_layoutreturn_release(void *calldata)
6478{
6479 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6480 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6481
6482 dprintk("--> %s\n", __func__);
849b286f
TM		 6483 spin_lock(&lo->plh_inode->i_lock);
6484 if (lrp->res.lrs_present)
6485 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6486 lo->plh_block_lgets--;
6487 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6488 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6489 kfree(calldata);
6490 dprintk("<-- %s\n", __func__);
6491}
6492
6493static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6494 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6495 .rpc_call_done = nfs4_layoutreturn_done,
6496 .rpc_release = nfs4_layoutreturn_release,
6497};
6498
6499int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6500{
6501 struct rpc_task *task;
6502 struct rpc_message msg = {
6503 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6504 .rpc_argp = &lrp->args,
6505 .rpc_resp = &lrp->res,
6506 };
6507 struct rpc_task_setup task_setup_data = {
6508 .rpc_client = lrp->clp->cl_rpcclient,
6509 .rpc_message = &msg,
6510 .callback_ops = &nfs4_layoutreturn_call_ops,
6511 .callback_data = lrp,
6512 };
6513 int status;
6514
6515 dprintk("--> %s\n", __func__);
9d12b216 6516 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6517 task = rpc_run_task(&task_setup_data);
6518 if (IS_ERR(task))
6519 return PTR_ERR(task);
6520 status = task->tk_status;
6521 dprintk("<-- %s status=%d\n", __func__, status);
6522 rpc_put_task(task);
6523 return status;
6524}
6525
7f11d8d3
AA		 6526/*
6527 * Retrieve the list of Data Server devices from the MDS.
6528 */
6529static int _nfs4_getdevicelist(struct nfs_server *server,
6530 const struct nfs_fh *fh,
6531 struct pnfs_devicelist *devlist)
6532{
6533 struct nfs4_getdevicelist_args args = {
6534 .fh = fh,
6535 .layoutclass = server->pnfs_curr_ld->id,
6536 };
6537 struct nfs4_getdevicelist_res res = {
6538 .devlist = devlist,
6539 };
6540 struct rpc_message msg = {
6541 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6542 .rpc_argp = &args,
6543 .rpc_resp = &res,
6544 };
6545 int status;
6546
6547 dprintk("--> %s\n", __func__);
6548 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6549 &res.seq_res, 0);
6550 dprintk("<-- %s status=%d\n", __func__, status);
6551 return status;
6552}
6553
6554int nfs4_proc_getdevicelist(struct nfs_server *server,
6555 const struct nfs_fh *fh,
6556 struct pnfs_devicelist *devlist)
6557{
6558 struct nfs4_exception exception = { };
6559 int err;
6560
6561 do {
6562 err = nfs4_handle_exception(server,
6563 _nfs4_getdevicelist(server, fh, devlist),
6564 &exception);
6565 } while (exception.retry);
6566
6567 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6568 err, devlist->num_devs);
6569
6570 return err;
6571}
6572EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6573
b1f69b75
AA		 6574static int
6575_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6576{
6577 struct nfs4_getdeviceinfo_args args = {
6578 .pdev = pdev,
6579 };
6580 struct nfs4_getdeviceinfo_res res = {
6581 .pdev = pdev,
6582 };
6583 struct rpc_message msg = {
6584 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6585 .rpc_argp = &args,
6586 .rpc_resp = &res,
6587 };
6588 int status;
6589
6590 dprintk("--> %s\n", __func__);
7c513058 6591 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6592 dprintk("<-- %s status=%d\n", __func__, status);
6593
6594 return status;
6595}
6596
6597int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6598{
6599 struct nfs4_exception exception = { };
6600 int err;
6601
6602 do {
6603 err = nfs4_handle_exception(server,
6604 _nfs4_proc_getdeviceinfo(server, pdev),
6605 &exception);
6606 } while (exception.retry);
6607 return err;
6608}
6609EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6610
863a3c6c
AA		 6611static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6612{
6613 struct nfs4_layoutcommit_data *data = calldata;
6614 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6615 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6616
d9afbd1b
TM		 6617 nfs41_setup_sequence(session,
6618 &data->args.seq_args,
6619 &data->res.seq_res,
6620 task);
863a3c6c
AA		 6621}
6622
6623static void
6624nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6625{
6626 struct nfs4_layoutcommit_data *data = calldata;
6627 struct nfs_server *server = NFS_SERVER(data->args.inode);
6628
6ba7db34 6629 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6630 return;
6631
6632 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6633 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6634 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6635 case -NFS4ERR_BADLAYOUT: /* no layout */
6636 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6637 task->tk_status = 0;
e59d27e0
TM		 6638 break;
6639 case 0:
863a3c6c
AA		 6640 nfs_post_op_update_inode_force_wcc(data->args.inode,
6641 data->res.fattr);
e59d27e0
TM		 6642 break;
6643 default:
6644 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6645 rpc_restart_call_prepare(task);
6646 return;
6647 }
6648 }
863a3c6c
AA		 6649}
6650
6651static void nfs4_layoutcommit_release(void *calldata)
6652{
6653 struct nfs4_layoutcommit_data *data = calldata;
6654
db29c089 6655 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 6656 put_rpccred(data->cred);
6657 kfree(data);
6658}
6659
6660static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6661 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6662 .rpc_call_done = nfs4_layoutcommit_done,
6663 .rpc_release = nfs4_layoutcommit_release,
6664};
6665
6666int
ef311537 6667nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6668{
6669 struct rpc_message msg = {
6670 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6671 .rpc_argp = &data->args,
6672 .rpc_resp = &data->res,
6673 .rpc_cred = data->cred,
6674 };
6675 struct rpc_task_setup task_setup_data = {
6676 .task = &data->task,
6677 .rpc_client = NFS_CLIENT(data->args.inode),
6678 .rpc_message = &msg,
6679 .callback_ops = &nfs4_layoutcommit_ops,
6680 .callback_data = data,
6681 .flags = RPC_TASK_ASYNC,
6682 };
6683 struct rpc_task *task;
6684 int status = 0;
6685
6686 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6687 "lbw: %llu inode %lu\n",
6688 data->task.tk_pid, sync,
6689 data->args.lastbytewritten,
6690 data->args.inode->i_ino);
6691
9d12b216 6692 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6693 task = rpc_run_task(&task_setup_data);
6694 if (IS_ERR(task))
6695 return PTR_ERR(task);
ef311537 6696 if (sync == false)
863a3c6c
AA		 6697 goto out;
6698 status = nfs4_wait_for_completion_rpc_task(task);
6699 if (status != 0)
6700 goto out;
6701 status = task->tk_status;
6702out:
6703 dprintk("%s: status %d\n", __func__, status);
6704 rpc_put_task(task);
6705 return status;
6706}
fca78d6d
BS		 6707
6708static int
6709_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6710 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6711{
6712 struct nfs41_secinfo_no_name_args args = {
6713 .style = SECINFO_STYLE_CURRENT_FH,
6714 };
6715 struct nfs4_secinfo_res res = {
6716 .flavors = flavors,
6717 };
6718 struct rpc_message msg = {
6719 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6720 .rpc_argp = &args,
6721 .rpc_resp = &res,
6722 };
6723 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6724}
6725
6726static int
6727nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6728 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6729{
6730 struct nfs4_exception exception = { };
6731 int err;
6732 do {
6733 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6734 switch (err) {
6735 case 0:
6736 case -NFS4ERR_WRONGSEC:
c1942219 6737 case -ENOTSUPP:
05e9cfb4 6738 goto out;
fca78d6d
BS		 6739 default:
6740 err = nfs4_handle_exception(server, err, &exception);
6741 }
6742 } while (exception.retry);
05e9cfb4 6743out:
fca78d6d
BS		 6744 return err;
6745}
6746
6747static int
6748nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6749 struct nfs_fsinfo *info)
6750{
6751 int err;
6752 struct page *page;
6753 rpc_authflavor_t flavor;
6754 struct nfs4_secinfo_flavors *flavors;
6755
6756 page = alloc_page(GFP_KERNEL);
6757 if (!page) {
6758 err = -ENOMEM;
6759 goto out;
6760 }
6761
6762 flavors = page_address(page);
6763 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6764
6765 /*
6766 * Fall back on "guess and check" method if
6767 * the server doesn't support SECINFO_NO_NAME
6768 */
c1942219 6769 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 6770 err = nfs4_find_root_sec(server, fhandle, info);
6771 goto out_freepage;
6772 }
6773 if (err)
6774 goto out_freepage;
6775
6776 flavor = nfs_find_best_sec(flavors);
6777 if (err == 0)
6778 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6779
6780out_freepage:
6781 put_page(page);
6782 if (err == -EACCES)
6783 return -EPERM;
6784out:
6785 return err;
6786}
1cab0652
BS		 6787
6788static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6789{
6790 int status;
6791 struct nfs41_test_stateid_args args = {
1cab0652 6792 .stateid = stateid,
7d974794
BS		 6793 };
6794 struct nfs41_test_stateid_res res;
6795 struct rpc_message msg = {
6796 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6797 .rpc_argp = &args,
6798 .rpc_resp = &res,
6799 };
1cab0652 6800
38527b15 6801 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6802 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6803 nfs4_set_sequence_privileged(&args.seq_args);
6804 status = nfs4_call_sync_sequence(server->client, server, &msg,
6805 &args.seq_args, &res.seq_res);
38527b15
CL		 6806 if (status != NFS_OK) {
6807 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6808 return status;
38527b15
CL		 6809 }
6810 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6811 return -res.status;
7d974794
BS		 6812}
6813
38527b15
CL		 6814/**
6815 * nfs41_test_stateid - perform a TEST_STATEID operation
6816 *
6817 * @server: server / transport on which to perform the operation
6818 * @stateid: state ID to test
6819 *
6820 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6821 * Otherwise a negative NFS4ERR value is returned if the operation
6822 * failed or the state ID is not currently valid.
6823 */
1cab0652 6824static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6825{
6826 struct nfs4_exception exception = { };
6827 int err;
6828 do {
377e507d
CL		 6829 err = _nfs41_test_stateid(server, stateid);
6830 if (err != -NFS4ERR_DELAY)
6831 break;
6832 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6833 } while (exception.retry);
6834 return err;
6835}
9aeda35f 6836
7c1d5fae
TM		 6837struct nfs_free_stateid_data {
6838 struct nfs_server *server;
6839 struct nfs41_free_stateid_args args;
9aeda35f 6840 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 6841};
6842
6843static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
6844{
6845 struct nfs_free_stateid_data *data = calldata;
6846 nfs41_setup_sequence(nfs4_get_session(data->server),
6847 &data->args.seq_args,
6848 &data->res.seq_res,
6849 task);
6850}
6851
6852static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
6853{
6854 struct nfs_free_stateid_data *data = calldata;
6855
6856 nfs41_sequence_done(task, &data->res.seq_res);
6857
6858 switch (task->tk_status) {
6859 case -NFS4ERR_DELAY:
6860 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
6861 rpc_restart_call_prepare(task);
6862 }
6863}
6864
6865static void nfs41_free_stateid_release(void *calldata)
6866{
6867 kfree(calldata);
6868}
6869
6870const struct rpc_call_ops nfs41_free_stateid_ops = {
6871 .rpc_call_prepare = nfs41_free_stateid_prepare,
6872 .rpc_call_done = nfs41_free_stateid_done,
6873 .rpc_release = nfs41_free_stateid_release,
6874};
6875
6876static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
6877 nfs4_stateid *stateid,
6878 bool privileged)
6879{
9aeda35f
BS		 6880 struct rpc_message msg = {
6881 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
9aeda35f 6882 };
7c1d5fae
TM		 6883 struct rpc_task_setup task_setup = {
6884 .rpc_client = server->client,
6885 .rpc_message = &msg,
6886 .callback_ops = &nfs41_free_stateid_ops,
6887 .flags = RPC_TASK_ASYNC,
6888 };
6889 struct nfs_free_stateid_data *data;
9aeda35f 6890
38527b15 6891 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 6892 data = kmalloc(sizeof(*data), GFP_NOFS);
6893 if (!data)
6894 return ERR_PTR(-ENOMEM);
6895 data->server = server;
6896 nfs4_stateid_copy(&data->args.stateid, stateid);
6897
6898 task_setup.callback_data = data;
6899
6900 msg.rpc_argp = &data->args;
6901 msg.rpc_resp = &data->res;
6902 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6903 if (privileged)
6904 nfs4_set_sequence_privileged(&data->args.seq_args);
6905
6906 return rpc_run_task(&task_setup);
9aeda35f
BS		 6907}
6908
38527b15
CL		 6909/**
6910 * nfs41_free_stateid - perform a FREE_STATEID operation
6911 *
6912 * @server: server / transport on which to perform the operation
6913 * @stateid: state ID to release
6914 *
6915 * Returns NFS_OK if the server freed "stateid". Otherwise a
6916 * negative NFS4ERR value is returned.
6917 */
1cab0652 6918static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6919{
7c1d5fae
TM		 6920 struct rpc_task *task;
6921 int ret;
6922
6923 task = _nfs41_free_stateid(server, stateid, true);
6924 if (IS_ERR(task))
6925 return PTR_ERR(task);
6926 ret = rpc_wait_for_completion_task(task);
6927 if (!ret)
6928 ret = task->tk_status;
6929 rpc_put_task(task);
6930 return ret;
9aeda35f 6931}
36281caa 6932
c8b2d0bf
TM		 6933static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
6934{
6935 struct rpc_task *task;
6936
6937 task = _nfs41_free_stateid(server, &lsp->ls_stateid, false);
6938 nfs4_free_lock_state(server, lsp);
6939 if (IS_ERR(task))
6940 return PTR_ERR(task);
6941 rpc_put_task(task);
6942 return 0;
6943}
6944
36281caa
TM		 6945static bool nfs41_match_stateid(const nfs4_stateid *s1,
6946 const nfs4_stateid *s2)
6947{
2d2f24ad 6948 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6949 return false;
6950
2d2f24ad 6951 if (s1->seqid == s2->seqid)
36281caa 6952 return true;
2d2f24ad 6953 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6954 return true;
6955
6956 return false;
6957}
6958
557134a3
AA		 6959#endif /* CONFIG_NFS_V4_1 */
6960
36281caa
TM		 6961static bool nfs4_match_stateid(const nfs4_stateid *s1,
6962 const nfs4_stateid *s2)
6963{
f597c537 6964 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6965}
6966
6967
17280175 6968static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6969 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6970 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6971 .recover_open = nfs4_open_reclaim,
6972 .recover_lock = nfs4_lock_reclaim,
591d71cb 6973 .establish_clid = nfs4_init_clientid,
90a16617 6974 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6975 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6976};
6977
591d71cb 6978#if defined(CONFIG_NFS_V4_1)
17280175 6979static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6980 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6981 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6982 .recover_open = nfs4_open_reclaim,
6983 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6984 .establish_clid = nfs41_init_clientid,
b4b82607 6985 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6986 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6987 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6988};
6989#endif /* CONFIG_NFS_V4_1 */
6990
17280175 6991static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6992 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6993 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
361eeee7 6994 .recover_open = nfs40_open_expired,
591d71cb
AA		 6995 .recover_lock = nfs4_lock_expired,
6996 .establish_clid = nfs4_init_clientid,
90a16617 6997 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6998};
6999
7000#if defined(CONFIG_NFS_V4_1)
17280175 7001static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 7002 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 7003 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 7004 .recover_open = nfs41_open_expired,
7005 .recover_lock = nfs41_lock_expired,
4d643d1d 7006 .establish_clid = nfs41_init_clientid,
b4b82607 7007 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 7008};
591d71cb 7009#endif /* CONFIG_NFS_V4_1 */
1da177e4 7010
17280175 7011static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 7012 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 7013 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 7014 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 7015};
7016
7017#if defined(CONFIG_NFS_V4_1)
17280175 7018static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 7019 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 7020 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 7021 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 7022};
7023#endif
7024
97dc1359
TM		 7025static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7026 .minor_version = 0,
39c6daae
TM		 7027 .init_caps = NFS_CAP_READDIRPLUS
7028 | NFS_CAP_ATOMIC_OPEN
7029 | NFS_CAP_CHANGE_ATTR
7030 | NFS_CAP_POSIX_LOCK,
97dc1359 7031 .call_sync = _nfs4_call_sync,
36281caa 7032 .match_stateid = nfs4_match_stateid,
fca78d6d 7033 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 7034 .free_lock_state = nfs4_release_lockowner,
c48f4f35
TM		 7035 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7036 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7037 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 7038};
7039
7040#if defined(CONFIG_NFS_V4_1)
7041static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7042 .minor_version = 1,
39c6daae
TM		 7043 .init_caps = NFS_CAP_READDIRPLUS
7044 | NFS_CAP_ATOMIC_OPEN
7045 | NFS_CAP_CHANGE_ATTR
3b66486c 7046 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 7047 | NFS_CAP_STATEID_NFSV41
7048 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 7049 .call_sync = nfs4_call_sync_sequence,
36281caa 7050 .match_stateid = nfs41_match_stateid,
fca78d6d 7051 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 7052 .free_lock_state = nfs41_free_lock_state,
c48f4f35
TM		 7053 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7054 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7055 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 7056};
7057#endif
7058
97dc1359
TM		 7059const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7060 [0] = &nfs_v4_0_minor_ops,
7061#if defined(CONFIG_NFS_V4_1)
7062 [1] = &nfs_v4_1_minor_ops,
7063#endif
7064};
7065
73a79706
BS		 7066const struct inode_operations nfs4_dir_inode_operations = {
7067 .create = nfs_create,
7068 .lookup = nfs_lookup,
7069 .atomic_open = nfs_atomic_open,
7070 .link = nfs_link,
7071 .unlink = nfs_unlink,
7072 .symlink = nfs_symlink,
7073 .mkdir = nfs_mkdir,
7074 .rmdir = nfs_rmdir,
7075 .mknod = nfs_mknod,
7076 .rename = nfs_rename,
7077 .permission = nfs_permission,
7078 .getattr = nfs_getattr,
7079 .setattr = nfs_setattr,
7080 .getxattr = generic_getxattr,
7081 .setxattr = generic_setxattr,
7082 .listxattr = generic_listxattr,
7083 .removexattr = generic_removexattr,
7084};
7085
92e1d5be 7086static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 7087 .permission = nfs_permission,
7088 .getattr = nfs_getattr,
7089 .setattr = nfs_setattr,
64c2ce8b
AK		 7090 .getxattr = generic_getxattr,
7091 .setxattr = generic_setxattr,
7092 .listxattr = generic_listxattr,
7093 .removexattr = generic_removexattr,
6b3b5496
BF		 7094};
7095
509de811 7096const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 7097 .version = 4, /* protocol version */
7098 .dentry_ops = &nfs4_dentry_operations,
7099 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 7100 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 7101 .file_ops = &nfs4_file_operations,
1da177e4 7102 .getroot = nfs4_proc_get_root,
281cad46 7103 .submount = nfs4_submount,
ff9099f2 7104 .try_mount = nfs4_try_mount,
1da177e4
LT		 7105 .getattr = nfs4_proc_getattr,
7106 .setattr = nfs4_proc_setattr,
7107 .lookup = nfs4_proc_lookup,
7108 .access = nfs4_proc_access,
7109 .readlink = nfs4_proc_readlink,
1da177e4
LT		 7110 .create = nfs4_proc_create,
7111 .remove = nfs4_proc_remove,
7112 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 7113 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 7114 .unlink_done = nfs4_proc_unlink_done,
7115 .rename = nfs4_proc_rename,
d3d4152a 7116 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 7117 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 7118 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 7119 .link = nfs4_proc_link,
7120 .symlink = nfs4_proc_symlink,
7121 .mkdir = nfs4_proc_mkdir,
7122 .rmdir = nfs4_proc_remove,
7123 .readdir = nfs4_proc_readdir,
7124 .mknod = nfs4_proc_mknod,
7125 .statfs = nfs4_proc_statfs,
7126 .fsinfo = nfs4_proc_fsinfo,
7127 .pathconf = nfs4_proc_pathconf,
e9326dca 7128 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7129 .decode_dirent = nfs4_decode_dirent,
7130 .read_setup = nfs4_proc_read_setup,
1abb5088 7131 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7132 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7133 .read_done = nfs4_read_done,
1da177e4 7134 .write_setup = nfs4_proc_write_setup,
57208fa7 7135 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7136 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7137 .write_done = nfs4_write_done,
1da177e4 7138 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7139 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7140 .commit_done = nfs4_commit_done,
1da177e4 7141 .lock = nfs4_proc_lock,
e50a1c2e 7142 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7143 .close_context = nfs4_close_context,
2b484297 7144 .open_context = nfs4_atomic_open,
011e2a7f 7145 .have_delegation = nfs4_have_delegation,
57ec14c5 7146 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7147 .alloc_client = nfs4_alloc_client,
45a52a02 7148 .init_client = nfs4_init_client,
cdb7eced 7149 .free_client = nfs4_free_client,
1179acc6
BS		 7150 .create_server = nfs4_create_server,
7151 .clone_server = nfs_clone_server,
1da177e4
LT		 7152};
7153
64c2ce8b
AK		 7154static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7155 .prefix = XATTR_NAME_NFSV4_ACL,
7156 .list = nfs4_xattr_list_nfs4_acl,
7157 .get = nfs4_xattr_get_nfs4_acl,
7158 .set = nfs4_xattr_set_nfs4_acl,
7159};
7160
7161const struct xattr_handler *nfs4_xattr_handlers[] = {
7162 &nfs4_xattr_nfs4_acl_handler,
7163 NULL
7164};
7165
1da177e4
LT		 7166/*
7167 * Local variables:
7168 * c-basic-offset: 8
7169 * End:
7170 */
kernel source for telekom puls (alcatel/mediatek)