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NFSv3: Fix another acl regression
[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;
d310310c 271 freezable_schedule_timeout_killable(*timeout);
65de872e
TM		 272 if (fatal_signal_pending(current))
273 res = -ERESTARTSYS;
274 *timeout <<= 1;
275 return res;
276}
277
278/* This is the error handling routine for processes that are allowed
279 * to sleep.
280 */
b064eca2 281static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 282{
283 struct nfs_client *clp = server->nfs_client;
9e33bed5 284 struct nfs4_state *state = exception->state;
3114ea7a 285 struct inode *inode = exception->inode;
65de872e
TM		 286 int ret = errorcode;
287
288 exception->retry = 0;
289 switch(errorcode) {
290 case 0:
291 return 0;
3114ea7a 292 case -NFS4ERR_OPENMODE:
011e2a7f 293 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 294 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 295 exception->retry = 1;
296 return 0;
297 }
298 if (state == NULL)
299 break;
5d422301
TM		 300 ret = nfs4_schedule_stateid_recovery(server, state);
301 if (ret < 0)
302 break;
3114ea7a 303 goto wait_on_recovery;
a1d0b5ee 304 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 305 case -NFS4ERR_ADMIN_REVOKED:
306 case -NFS4ERR_BAD_STATEID:
b570a975
TM		 307 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
308 nfs_remove_bad_delegation(inode);
309 exception->retry = 1;
310 break;
311 }
9e33bed5
TM		 312 if (state == NULL)
313 break;
5d422301
TM		 314 ret = nfs4_schedule_stateid_recovery(server, state);
315 if (ret < 0)
316 break;
0400a6b0 317 goto wait_on_recovery;
0ced63d1 318 case -NFS4ERR_EXPIRED:
5d422301
TM		 319 if (state != NULL) {
320 ret = nfs4_schedule_stateid_recovery(server, state);
321 if (ret < 0)
322 break;
323 }
65de872e 324 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 325 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 326 nfs4_schedule_lease_recovery(clp);
327 goto wait_on_recovery;
03391693 328#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 329 case -NFS4ERR_BADSESSION:
330 case -NFS4ERR_BADSLOT:
331 case -NFS4ERR_BAD_HIGH_SLOT:
332 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
333 case -NFS4ERR_DEADSESSION:
334 case -NFS4ERR_SEQ_FALSE_RETRY:
335 case -NFS4ERR_SEQ_MISORDERED:
336 dprintk("%s ERROR: %d Reset session\n", __func__,
337 errorcode);
9f594791 338 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 339 goto wait_on_recovery;
03391693 340#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 341 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 342 if (exception->timeout > HZ) {
343 /* We have retried a decent amount, time to
344 * fail
345 */
346 ret = -EBUSY;
347 break;
348 }
65de872e
TM		 349 case -NFS4ERR_GRACE:
350 case -NFS4ERR_DELAY:
351 ret = nfs4_delay(server->client, &exception->timeout);
352 if (ret != 0)
353 break;
a8a4ae3a 354 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 355 case -NFS4ERR_OLD_STATEID:
356 exception->retry = 1;
b064eca2
TM		 357 break;
358 case -NFS4ERR_BADOWNER:
359 /* The following works around a Linux server bug! */
360 case -NFS4ERR_BADNAME:
361 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
362 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
363 exception->retry = 1;
364 printk(KERN_WARNING "NFS: v4 server %s "
365 "does not accept raw "
366 "uid/gids. "
367 "Reenabling the idmapper.\n",
368 server->nfs_client->cl_hostname);
369 }
65de872e
TM		 370 }
371 /* We failed to handle the error */
372 return nfs4_map_errors(ret);
0400a6b0 373wait_on_recovery:
a2c0b9e2
TM		 374 ret = nfs4_wait_clnt_recover(clp);
375 if (ret == 0)
376 exception->retry = 1;
377 return ret;
65de872e
TM		 378}
379
380
452e9352 381static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 382{
1da177e4
LT		 383 spin_lock(&clp->cl_lock);
384 if (time_before(clp->cl_last_renewal,timestamp))
385 clp->cl_last_renewal = timestamp;
386 spin_unlock(&clp->cl_lock);
387}
388
452e9352
TM		 389static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
390{
391 do_renew_lease(server->nfs_client, timestamp);
392}
393
cccef3b9
AA		 394#if defined(CONFIG_NFS_V4_1)
395
d185a334 396static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 397{
e3725ec0 398 struct nfs4_session *session;
13615871 399 struct nfs4_slot_table *tbl;
c10e4498 400 bool send_new_highest_used_slotid = false;
13615871 401
dfb4f309 402 if (!res->sr_slot) {
13615871
AA		 403 /* just wake up the next guy waiting since
404 * we may have not consumed a slot after all */
691daf3b 405 dprintk("%s: No slot\n", __func__);
35dc1d74 406 return;
13615871 407 }
e3725ec0
TM		 408 tbl = res->sr_slot->table;
409 session = tbl->session;
ea028ac9 410
35dc1d74 411 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 412 /* Be nice to the server: try to ensure that the last transmitted
413 * value for highest_user_slotid <= target_highest_slotid
414 */
415 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
416 send_new_highest_used_slotid = true;
417
b75ad4cd
TM		 418 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
419 send_new_highest_used_slotid = false;
420 goto out_unlock;
421 }
f4af6e2a 422 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 423
424 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
425 send_new_highest_used_slotid = false;
b75ad4cd 426out_unlock:
35dc1d74 427 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 428 res->sr_slot = NULL;
c10e4498
TM		 429 if (send_new_highest_used_slotid)
430 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 431}
432
14516c3a 433static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 434{
e3725ec0 435 struct nfs4_session *session;
933602e3 436 struct nfs4_slot *slot;
14516c3a 437 struct nfs_client *clp;
ac20d163 438 bool interrupted = false;
85563073 439 int ret = 1;
b0df806c 440
468f8613
BS		 441 /* don't increment the sequence number if the task wasn't sent */
442 if (!RPC_WAS_SENT(task))
b0df806c
AA		 443 goto out;
444
933602e3 445 slot = res->sr_slot;
e3725ec0 446 session = slot->table->session;
933602e3 447
ac20d163
TM		 448 if (slot->interrupted) {
449 slot->interrupted = 0;
450 interrupted = true;
451 }
452
691daf3b 453 /* Check the SEQUENCE operation status */
14516c3a
TM		 454 switch (res->sr_status) {
455 case 0:
b0df806c 456 /* Update the slot's sequence and clientid lease timer */
933602e3 457 ++slot->seq_nr;
e3725ec0 458 clp = session->clp;
8e63b6a8 459 do_renew_lease(clp, res->sr_timestamp);
0629e370 460 /* Check sequence flags */
b4410c2f
TM		 461 if (res->sr_status_flags != 0)
462 nfs4_schedule_lease_recovery(clp);
464ee9f9 463 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 464 break;
ac20d163
TM		 465 case 1:
466 /*
467 * sr_status remains 1 if an RPC level error occurred.
468 * The server may or may not have processed the sequence
469 * operation..
470 * Mark the slot as having hosted an interrupted RPC call.
471 */
472 slot->interrupted = 1;
473 goto out;
14516c3a
TM		 474 case -NFS4ERR_DELAY:
475 /* The server detected a resend of the RPC call and
476 * returned NFS4ERR_DELAY as per Section 2.10.6.2
477 * of RFC5661.
478 */
df2fabff 479 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 480 __func__,
df2fabff 481 slot->slot_nr,
933602e3 482 slot->seq_nr);
14516c3a 483 goto out_retry;
85563073
TM		 484 case -NFS4ERR_BADSLOT:
485 /*
486 * The slot id we used was probably retired. Try again
487 * using a different slot id.
488 */
e8794440
TM		 489 goto retry_nowait;
490 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 491 /*
492 * Was the last operation on this sequence interrupted?
493 * If so, retry after bumping the sequence number.
494 */
495 if (interrupted) {
496 ++slot->seq_nr;
497 goto retry_nowait;
498 }
e8794440
TM		 499 /*
500 * Could this slot have been previously retired?
501 * If so, then the server may be expecting seq_nr = 1!
502 */
8e63b6a8
TM		 503 if (slot->seq_nr != 1) {
504 slot->seq_nr = 1;
505 goto retry_nowait;
506 }
507 break;
e8794440
TM		 508 case -NFS4ERR_SEQ_FALSE_RETRY:
509 ++slot->seq_nr;
510 goto retry_nowait;
14516c3a
TM		 511 default:
512 /* Just update the slot sequence no. */
933602e3 513 ++slot->seq_nr;
b0df806c
AA		 514 }
515out:
516 /* The session may be reset by one of the error handlers. */
517 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 518 nfs41_sequence_free_slot(res);
85563073 519 return ret;
e8794440
TM		 520retry_nowait:
521 if (rpc_restart_call_prepare(task)) {
522 task->tk_status = 0;
523 ret = 0;
524 }
525 goto out;
14516c3a 526out_retry:
d05dd4e9 527 if (!rpc_restart_call(task))
14516c3a
TM		 528 goto out;
529 rpc_delay(task, NFS4_POLL_RETRY_MAX);
530 return 0;
b0df806c
AA		 531}
532
14516c3a
TM		 533static int nfs4_sequence_done(struct rpc_task *task,
534 struct nfs4_sequence_res *res)
df896455 535{
e3725ec0 536 if (res->sr_slot == NULL)
14516c3a
TM		 537 return 1;
538 return nfs41_sequence_done(task, res);
df896455
TM		 539}
540
9d12b216
TM		 541static void nfs41_init_sequence(struct nfs4_sequence_args *args,
542 struct nfs4_sequence_res *res, int cache_reply)
543{
2b2fa717 544 args->sa_slot = NULL;
9d12b216 545 args->sa_cache_this = 0;
8fe72bac 546 args->sa_privileged = 0;
9d12b216
TM		 547 if (cache_reply)
548 args->sa_cache_this = 1;
9d12b216
TM		 549 res->sr_slot = NULL;
550}
551
8fe72bac
TM		 552static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
553{
554 args->sa_privileged = 1;
555}
556
dc70d7b3 557int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 558 struct nfs4_sequence_args *args,
559 struct nfs4_sequence_res *res,
ce5039c1
AA		 560 struct rpc_task *task)
561{
fbcd4abc
AA		 562 struct nfs4_slot *slot;
563 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 564
565 dprintk("--> %s\n", __func__);
ce5039c1 566 /* slot already allocated? */
dfb4f309 567 if (res->sr_slot != NULL)
d9afbd1b 568 goto out_success;
ce5039c1 569
fbcd4abc
AA		 570 tbl = &session->fc_slot_table;
571
69d206b5
TM		 572 task->tk_timeout = 0;
573
fbcd4abc 574 spin_lock(&tbl->slot_tbl_lock);
774d5f14 575 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 576 !args->sa_privileged) {
0b1c8fc4 577 /* The state manager will wait until the slot table is empty */
0b1c8fc4 578 dprintk("%s session is draining\n", __func__);
7b939a3f 579 goto out_sleep;
689cf5c1
AB		 580 }
581
2dc03b7f 582 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 583 if (IS_ERR(slot)) {
584 /* If out of memory, try again in 1/4 second */
585 if (slot == ERR_PTR(-ENOMEM))
586 task->tk_timeout = HZ >> 2;
fbcd4abc 587 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 588 goto out_sleep;
fbcd4abc
AA		 589 }
590 spin_unlock(&tbl->slot_tbl_lock);
591
2b2fa717 592 args->sa_slot = slot;
fbcd4abc 593
2dc03b7f
TM		 594 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
595 slot->slot_nr, slot->seq_nr);
fbcd4abc 596
dfb4f309 597 res->sr_slot = slot;
8e63b6a8 598 res->sr_timestamp = jiffies;
2a6e26cd 599 res->sr_status_flags = 0;
fbcd4abc
AA		 600 /*
601 * sr_status is only set in decode_sequence, and so will remain
602 * set to 1 if an rpc level failure occurs.
603 */
604 res->sr_status = 1;
d9afbd1b
TM		 605out_success:
606 rpc_call_start(task);
ce5039c1 607 return 0;
7b939a3f 608out_sleep:
8fe72bac
TM		 609 /* Privileged tasks are queued with top priority */
610 if (args->sa_privileged)
1e1093c7
TM		 611 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
612 NULL, RPC_PRIORITY_PRIVILEGED);
613 else
614 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 615 spin_unlock(&tbl->slot_tbl_lock);
616 return -EAGAIN;
ce5039c1 617}
dc70d7b3 618EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 619
035168ab 620int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 621 struct nfs4_sequence_args *args,
622 struct nfs4_sequence_res *res,
ce5039c1
AA		 623 struct rpc_task *task)
624{
035168ab 625 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 626 int ret = 0;
627
d9afbd1b
TM		 628 if (session == NULL) {
629 rpc_call_start(task);
035168ab 630 goto out;
d9afbd1b 631 }
035168ab 632
df2fabff 633 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 634 __func__, session->clp, session, res->sr_slot ?
df2fabff 635 res->sr_slot->slot_nr : -1);
ce5039c1 636
9d12b216 637 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 638out:
639 dprintk("<-- %s status=%d\n", __func__, ret);
640 return ret;
641}
642
643struct nfs41_call_sync_data {
035168ab 644 const struct nfs_server *seq_server;
ce5039c1
AA		 645 struct nfs4_sequence_args *seq_args;
646 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 647};
648
649static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
650{
651 struct nfs41_call_sync_data *data = calldata;
6ba7db34 652 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 653
035168ab
TM		 654 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
655
d9afbd1b 656 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 657}
658
69ab40c4
AA		 659static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
660{
661 struct nfs41_call_sync_data *data = calldata;
662
14516c3a 663 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 664}
665
17280175 666static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 667 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 668 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 669};
670
7c513058
BS		 671static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
672 struct nfs_server *server,
ce5039c1
AA		 673 struct rpc_message *msg,
674 struct nfs4_sequence_args *args,
8fe72bac 675 struct nfs4_sequence_res *res)
ce5039c1
AA		 676{
677 int ret;
678 struct rpc_task *task;
679 struct nfs41_call_sync_data data = {
035168ab 680 .seq_server = server,
ce5039c1
AA		 681 .seq_args = args,
682 .seq_res = res,
ce5039c1
AA		 683 };
684 struct rpc_task_setup task_setup = {
7c513058 685 .rpc_client = clnt,
ce5039c1
AA		 686 .rpc_message = msg,
687 .callback_ops = &nfs41_call_sync_ops,
688 .callback_data = &data
689 };
690
ce5039c1
AA		 691 task = rpc_run_task(&task_setup);
692 if (IS_ERR(task))
693 ret = PTR_ERR(task);
694 else {
695 ret = task->tk_status;
696 rpc_put_task(task);
697 }
698 return ret;
699}
700
df896455 701#else
8fe72bac 702static
9d12b216
TM		 703void nfs41_init_sequence(struct nfs4_sequence_args *args,
704 struct nfs4_sequence_res *res, int cache_reply)
705{
706}
707
8fe72bac
TM		 708static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
709{
710}
711
712
14516c3a
TM		 713static int nfs4_sequence_done(struct rpc_task *task,
714 struct nfs4_sequence_res *res)
df896455 715{
14516c3a 716 return 1;
df896455 717}
cccef3b9
AA		 718#endif /* CONFIG_NFS_V4_1 */
719
fd0c0953 720static
7c513058
BS		 721int _nfs4_call_sync(struct rpc_clnt *clnt,
722 struct nfs_server *server,
cccef3b9
AA		 723 struct rpc_message *msg,
724 struct nfs4_sequence_args *args,
fd0c0953 725 struct nfs4_sequence_res *res)
cccef3b9 726{
7c513058 727 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 728}
729
fd0c0953 730static
7c513058
BS		 731int nfs4_call_sync(struct rpc_clnt *clnt,
732 struct nfs_server *server,
e73b83f2
BS		 733 struct rpc_message *msg,
734 struct nfs4_sequence_args *args,
735 struct nfs4_sequence_res *res,
736 int cache_reply)
737{
fd0c0953 738 nfs41_init_sequence(args, res, cache_reply);
7c513058 739 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
fd0c0953 740 args, res);
e73b83f2 741}
cccef3b9 742
38478b24 743static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 744{
38478b24 745 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 746
38478b24 747 spin_lock(&dir->i_lock);
359d7d1c 748 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 749 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 750 nfs_force_lookup_revalidate(dir);
a9a4a87a 751 dir->i_version = cinfo->after;
de242c0b 752 nfs_fscache_invalidate(dir);
38478b24 753 spin_unlock(&dir->i_lock);
1da177e4
LT		 754}
755
e56e0b78 756struct nfs4_opendata {
c6d00e63 757 struct kref kref;
e56e0b78
TM		 758 struct nfs_openargs o_arg;
759 struct nfs_openres o_res;
cdd4e68b
TM		 760 struct nfs_open_confirmargs c_arg;
761 struct nfs_open_confirmres c_res;
6926afd1
TM		 762 struct nfs4_string owner_name;
763 struct nfs4_string group_name;
e56e0b78 764 struct nfs_fattr f_attr;
e56e0b78 765 struct dentry *dir;
82a2c1b7 766 struct dentry *dentry;
e56e0b78 767 struct nfs4_state_owner *owner;
aac00a8d 768 struct nfs4_state *state;
e56e0b78 769 struct iattr attrs;
26e976a8 770 unsigned long timestamp;
3e309914 771 unsigned int rpc_done : 1;
bdeca1b7 772 unsigned int is_recover : 1;
24ac23ab
TM		 773 int rpc_status;
774 int cancelled;
e56e0b78
TM		 775};
776
49f9a0fa
TM		 777static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
778 int err, struct nfs4_exception *exception)
779{
780 if (err != -EINVAL)
781 return false;
782 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
783 return false;
784 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
785 exception->retry = 1;
786 return true;
787}
788
789static enum open_claim_type4
790nfs4_map_atomic_open_claim(struct nfs_server *server,
791 enum open_claim_type4 claim)
792{
793 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
794 return claim;
795 switch (claim) {
796 default:
797 return claim;
798 case NFS4_OPEN_CLAIM_FH:
799 return NFS4_OPEN_CLAIM_NULL;
800 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
801 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
802 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
803 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
804 }
805}
2ced46c2
TM		 806
807static void nfs4_init_opendata_res(struct nfs4_opendata *p)
808{
809 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 810 p->o_res.seqid = p->o_arg.seqid;
811 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 812 p->o_res.server = p->o_arg.server;
5f657530 813 p->o_res.access_request = p->o_arg.access;
2ced46c2 814 nfs_fattr_init(&p->f_attr);
6926afd1 815 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 816}
817
82a2c1b7 818static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 819 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 820 const struct iattr *attrs,
4a1c0893 821 enum open_claim_type4 claim,
8535b2be 822 gfp_t gfp_mask)
e56e0b78 823{
82a2c1b7 824 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 825 struct inode *dir = parent->d_inode;
826 struct nfs_server *server = NFS_SERVER(dir);
827 struct nfs4_opendata *p;
828
8535b2be 829 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 830 if (p == NULL)
831 goto err;
8535b2be 832 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 833 if (p->o_arg.seqid == NULL)
834 goto err_free;
82a2c1b7
AV		 835 nfs_sb_active(dentry->d_sb);
836 p->dentry = dget(dentry);
e56e0b78
TM		 837 p->dir = parent;
838 p->owner = sp;
839 atomic_inc(&sp->so_count);
dc0b027d
TM		 840 p->o_arg.open_flags = flags;
841 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 842 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
843 * will return permission denied for all bits until close */
844 if (!(flags & O_EXCL)) {
845 /* ask server to check for all possible rights as results
846 * are cached */
847 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
848 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 849 }
7539bbab 850 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 851 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
852 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 853 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 854 p->o_arg.server = server;
855 p->o_arg.bitmask = server->attr_bitmask;
1549210f 856 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
49f9a0fa
TM		 857 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
858 switch (p->o_arg.claim) {
4a1c0893
TM		 859 case NFS4_OPEN_CLAIM_NULL:
860 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
861 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
862 p->o_arg.fh = NFS_FH(dir);
863 break;
864 case NFS4_OPEN_CLAIM_PREVIOUS:
865 case NFS4_OPEN_CLAIM_FH:
866 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
867 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
868 p->o_arg.fh = NFS_FH(dentry->d_inode);
869 }
536e43d1 870 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 871 __be32 verf[2];
d77d76ff 872
e56e0b78
TM		 873 p->o_arg.u.attrs = &p->attrs;
874 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 875
876 verf[0] = jiffies;
877 verf[1] = current->pid;
878 memcpy(p->o_arg.u.verifier.data, verf,
879 sizeof(p->o_arg.u.verifier.data));
e56e0b78 880 }
cdd4e68b
TM		 881 p->c_arg.fh = &p->o_res.fh;
882 p->c_arg.stateid = &p->o_res.stateid;
883 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 884 nfs4_init_opendata_res(p);
c6d00e63 885 kref_init(&p->kref);
e56e0b78
TM		 886 return p;
887err_free:
888 kfree(p);
889err:
890 dput(parent);
891 return NULL;
892}
893
c6d00e63 894static void nfs4_opendata_free(struct kref *kref)
e56e0b78 895{
c6d00e63
TM		 896 struct nfs4_opendata *p = container_of(kref,
897 struct nfs4_opendata, kref);
82a2c1b7 898 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 899
900 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 901 if (p->state != NULL)
902 nfs4_put_open_state(p->state);
c6d00e63
TM		 903 nfs4_put_state_owner(p->owner);
904 dput(p->dir);
82a2c1b7
AV		 905 dput(p->dentry);
906 nfs_sb_deactive(sb);
6926afd1 907 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 908 kfree(p);
909}
910
911static void nfs4_opendata_put(struct nfs4_opendata *p)
912{
913 if (p != NULL)
914 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 915}
916
06f814a3
TM		 917static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
918{
06f814a3
TM		 919 int ret;
920
06f814a3 921 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 922 return ret;
923}
924
dc0b027d 925static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 926{
927 int ret = 0;
dc0b027d 928
536e43d1 929 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 930 goto out;
931 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 932 case FMODE_READ:
88069f77
TM		 933 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
934 && state->n_rdonly != 0;
6ee41268
TM		 935 break;
936 case FMODE_WRITE:
88069f77
TM		 937 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
938 && state->n_wronly != 0;
6ee41268
TM		 939 break;
940 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 941 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
942 && state->n_rdwr != 0;
6ee41268 943 }
dc0b027d 944out:
6ee41268
TM		 945 return ret;
946}
947
dc0b027d 948static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 949{
652f89f6
TM		 950 if (delegation == NULL)
951 return 0;
dc0b027d 952 if ((delegation->type & fmode) != fmode)
aac00a8d 953 return 0;
15c831bf 954 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 955 return 0;
d25be546
TM		 956 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
957 return 0;
b7391f44 958 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 959 return 1;
960}
961
dc0b027d 962static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 963{
dc0b027d 964 switch (fmode) {
e7616923
TM		 965 case FMODE_WRITE:
966 state->n_wronly++;
967 break;
968 case FMODE_READ:
969 state->n_rdonly++;
970 break;
971 case FMODE_READ|FMODE_WRITE:
972 state->n_rdwr++;
973 }
dc0b027d 974 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 975}
976
dc0b027d 977static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 978{
979 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 980 nfs4_stateid_copy(&state->stateid, stateid);
981 nfs4_stateid_copy(&state->open_stateid, stateid);
92b40e93 982 set_bit(NFS_OPEN_STATE, &state->flags);
dc0b027d 983 switch (fmode) {
003707c7
TM		 984 case FMODE_READ:
985 set_bit(NFS_O_RDONLY_STATE, &state->flags);
986 break;
987 case FMODE_WRITE:
988 set_bit(NFS_O_WRONLY_STATE, &state->flags);
989 break;
990 case FMODE_READ|FMODE_WRITE:
991 set_bit(NFS_O_RDWR_STATE, &state->flags);
992 }
e7616923
TM		 993}
994
dc0b027d 995static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 996{
8bda4e4c 997 write_seqlock(&state->seqlock);
dc0b027d 998 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 999 write_sequnlock(&state->seqlock);
003707c7
TM		 1000}
1001
dc0b027d 1002static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1003{
8bda4e4c
TM		 1004 /*
1005 * Protect the call to nfs4_state_set_mode_locked and
1006 * serialise the stateid update
1007 */
1008 write_seqlock(&state->seqlock);
003707c7 1009 if (deleg_stateid != NULL) {
f597c537 1010 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1011 set_bit(NFS_DELEGATED_STATE, &state->flags);
1012 }
1013 if (open_stateid != NULL)
dc0b027d 1014 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1015 write_sequnlock(&state->seqlock);
1016 spin_lock(&state->owner->so_lock);
dc0b027d 1017 update_open_stateflags(state, fmode);
ec073428 1018 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1019}
1020
dc0b027d 1021static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1022{
1023 struct nfs_inode *nfsi = NFS_I(state->inode);
1024 struct nfs_delegation *deleg_cur;
1025 int ret = 0;
1026
dc0b027d 1027 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1028
1029 rcu_read_lock();
1030 deleg_cur = rcu_dereference(nfsi->delegation);
1031 if (deleg_cur == NULL)
1032 goto no_delegation;
1033
1034 spin_lock(&deleg_cur->lock);
1035 if (nfsi->delegation != deleg_cur ||
d25be546 1036 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1037 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1038 goto no_delegation_unlock;
1039
1040 if (delegation == NULL)
1041 delegation = &deleg_cur->stateid;
f597c537 1042 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1043 goto no_delegation_unlock;
1044
b7391f44 1045 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1046 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1047 ret = 1;
1048no_delegation_unlock:
1049 spin_unlock(&deleg_cur->lock);
1050no_delegation:
1051 rcu_read_unlock();
1052
1053 if (!ret && open_stateid != NULL) {
dc0b027d 1054 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1055 ret = 1;
1056 }
1057
1058 return ret;
1059}
1060
1061
dc0b027d 1062static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1063{
1064 struct nfs_delegation *delegation;
1065
1066 rcu_read_lock();
1067 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1068 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1069 rcu_read_unlock();
1070 return;
1071 }
1072 rcu_read_unlock();
57ec14c5 1073 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1074}
1075
6ee41268 1076static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1077{
1078 struct nfs4_state *state = opendata->state;
1079 struct nfs_inode *nfsi = NFS_I(state->inode);
1080 struct nfs_delegation *delegation;
f448badd 1081 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1082 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1083 nfs4_stateid stateid;
1084 int ret = -EAGAIN;
1085
aac00a8d 1086 for (;;) {
dc0b027d 1087 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1088 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1089 if (can_open_cached(state, fmode, open_mode)) {
1090 update_open_stateflags(state, fmode);
6ee41268 1091 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1092 goto out_return_state;
1093 }
1094 spin_unlock(&state->owner->so_lock);
1095 }
34310430
TM		 1096 rcu_read_lock();
1097 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1098 if (!can_open_delegated(delegation, fmode)) {
34310430 1099 rcu_read_unlock();
aac00a8d 1100 break;
34310430 1101 }
aac00a8d 1102 /* Save the delegation */
f597c537 1103 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1104 rcu_read_unlock();
fa332941 1105 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1106 if (!opendata->is_recover) {
1107 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1108 if (ret != 0)
1109 goto out;
1110 }
aac00a8d 1111 ret = -EAGAIN;
34310430
TM		 1112
1113 /* Try to update the stateid using the delegation */
dc0b027d 1114 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1115 goto out_return_state;
aac00a8d 1116 }
aac00a8d
TM		 1117out:
1118 return ERR_PTR(ret);
1119out_return_state:
1120 atomic_inc(&state->count);
1121 return state;
1122}
1123
e23008ec
AA		 1124static void
1125nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1126{
1127 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1128 struct nfs_delegation *delegation;
1129 int delegation_flags = 0;
1130
1131 rcu_read_lock();
1132 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1133 if (delegation)
1134 delegation_flags = delegation->flags;
1135 rcu_read_unlock();
1136 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1137 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1138 "returning a delegation for "
1139 "OPEN(CLAIM_DELEGATE_CUR)\n",
1140 clp->cl_hostname);
1141 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1142 nfs_inode_set_delegation(state->inode,
1143 data->owner->so_cred,
1144 &data->o_res);
1145 else
1146 nfs_inode_reclaim_delegation(state->inode,
1147 data->owner->so_cred,
1148 &data->o_res);
1149}
1150
1151/*
1152 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1153 * and update the nfs4_state.
1154 */
1155static struct nfs4_state *
1156_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1157{
1158 struct inode *inode = data->state->inode;
1159 struct nfs4_state *state = data->state;
1160 int ret;
1161
231817ee
WAA		 1162 if (!data->rpc_done) {
1163 if (data->rpc_status) {
1164 ret = data->rpc_status;
1165 goto err;
1166 }
1167 /* cached opens have already been processed */
1168 goto update;
e23008ec
AA		 1169 }
1170
e23008ec
AA		 1171 ret = nfs_refresh_inode(inode, &data->f_attr);
1172 if (ret)
1173 goto err;
1174
1175 if (data->o_res.delegation_type != 0)
1176 nfs4_opendata_check_deleg(data, state);
231817ee 1177update:
e23008ec
AA		 1178 update_open_stateid(state, &data->o_res.stateid, NULL,
1179 data->o_arg.fmode);
1311157d 1180 atomic_inc(&state->count);
e23008ec
AA		 1181
1182 return state;
1183err:
1184 return ERR_PTR(ret);
1185
1186}
1187
1188static struct nfs4_state *
1189_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1190{
1191 struct inode *inode;
1192 struct nfs4_state *state = NULL;
1b370bc2 1193 int ret;
24ac23ab 1194
aac00a8d 1195 if (!data->rpc_done) {
6ee41268 1196 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1197 goto out;
1198 }
1199
1b370bc2 1200 ret = -EAGAIN;
24ac23ab 1201 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1202 goto err;
24ac23ab 1203 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1204 ret = PTR_ERR(inode);
03f28e3a 1205 if (IS_ERR(inode))
1b370bc2
TM		 1206 goto err;
1207 ret = -ENOMEM;
24ac23ab
TM		 1208 state = nfs4_get_open_state(inode, data->owner);
1209 if (state == NULL)
1b370bc2 1210 goto err_put_inode;
e23008ec
AA		 1211 if (data->o_res.delegation_type != 0)
1212 nfs4_opendata_check_deleg(data, state);
34310430 1213 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1214 data->o_arg.fmode);
24ac23ab 1215 iput(inode);
aac00a8d 1216out:
7aa262b5 1217 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1218 return state;
1b370bc2
TM		 1219err_put_inode:
1220 iput(inode);
1221err:
1222 return ERR_PTR(ret);
24ac23ab
TM		 1223}
1224
e23008ec
AA		 1225static struct nfs4_state *
1226nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1227{
1228 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1229 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1230 return _nfs4_opendata_to_nfs4_state(data);
1231}
1232
864472e9
TM		 1233static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1234{
1235 struct nfs_inode *nfsi = NFS_I(state->inode);
1236 struct nfs_open_context *ctx;
1237
1238 spin_lock(&state->inode->i_lock);
1239 list_for_each_entry(ctx, &nfsi->open_files, list) {
1240 if (ctx->state != state)
1241 continue;
1242 get_nfs_open_context(ctx);
1243 spin_unlock(&state->inode->i_lock);
1244 return ctx;
1245 }
1246 spin_unlock(&state->inode->i_lock);
1247 return ERR_PTR(-ENOENT);
1248}
1249
4a1c0893
TM		 1250static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1251 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1252{
1253 struct nfs4_opendata *opendata;
1254
4a1c0893
TM		 1255 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1256 NULL, claim, GFP_NOFS);
6f220ed5
TM		 1257 if (opendata == NULL)
1258 return ERR_PTR(-ENOMEM);
1259 opendata->state = state;
1260 atomic_inc(&state->count);
1261 return opendata;
1262}
1263
dc0b027d 1264static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1265{
2ced46c2 1266 struct nfs4_state *newstate;
864472e9
TM		 1267 int ret;
1268
dc0b027d
TM		 1269 opendata->o_arg.open_flags = 0;
1270 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1271 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1272 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1273 nfs4_init_opendata_res(opendata);
b257957e 1274 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1275 if (ret != 0)
1276 return ret;
2ced46c2 1277 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1278 if (IS_ERR(newstate))
1279 return PTR_ERR(newstate);
643168c2 1280 nfs4_close_state(newstate, fmode);
2ced46c2 1281 *res = newstate;
864472e9
TM		 1282 return 0;
1283}
1284
1285static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1286{
864472e9 1287 struct nfs4_state *newstate;
864472e9
TM		 1288 int ret;
1289
1290 /* memory barrier prior to reading state->n_* */
2ced46c2 1291 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1292 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1293 smp_rmb();
1294 if (state->n_rdwr != 0) {
b0ed9dbc 1295 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1296 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1297 if (ret != 0)
1298 return ret;
2ced46c2
TM		 1299 if (newstate != state)
1300 return -ESTALE;
864472e9
TM		 1301 }
1302 if (state->n_wronly != 0) {
b0ed9dbc 1303 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1304 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1305 if (ret != 0)
1306 return ret;
2ced46c2
TM		 1307 if (newstate != state)
1308 return -ESTALE;
864472e9
TM		 1309 }
1310 if (state->n_rdonly != 0) {
b0ed9dbc 1311 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1312 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1313 if (ret != 0)
1314 return ret;
2ced46c2
TM		 1315 if (newstate != state)
1316 return -ESTALE;
864472e9 1317 }
1ac7e2fd
TM		 1318 /*
1319 * We may have performed cached opens for all three recoveries.
1320 * Check if we need to update the current stateid.
1321 */
1322 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1323 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1324 write_seqlock(&state->seqlock);
1ac7e2fd 1325 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1326 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1327 write_sequnlock(&state->seqlock);
1ac7e2fd 1328 }
864472e9
TM		 1329 return 0;
1330}
1331
1da177e4
LT		 1332/*
1333 * OPEN_RECLAIM:
1334 * reclaim state on the server after a reboot.
1da177e4 1335 */
539cd03a 1336static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1337{
1ac7e2fd 1338 struct nfs_delegation *delegation;
864472e9 1339 struct nfs4_opendata *opendata;
dc0b027d 1340 fmode_t delegation_type = 0;
1da177e4
LT		 1341 int status;
1342
4a1c0893
TM		 1343 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1344 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1345 if (IS_ERR(opendata))
1346 return PTR_ERR(opendata);
1ac7e2fd
TM		 1347 rcu_read_lock();
1348 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1349 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1350 delegation_type = delegation->type;
1ac7e2fd 1351 rcu_read_unlock();
864472e9
TM		 1352 opendata->o_arg.u.delegation_type = delegation_type;
1353 status = nfs4_open_recover(opendata, state);
c6d00e63 1354 nfs4_opendata_put(opendata);
1da177e4
LT		 1355 return status;
1356}
1357
539cd03a 1358static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1359{
1360 struct nfs_server *server = NFS_SERVER(state->inode);
1361 struct nfs4_exception exception = { };
1362 int err;
1363 do {
539cd03a 1364 err = _nfs4_do_open_reclaim(ctx, state);
49f9a0fa
TM		 1365 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1366 continue;
168667c4 1367 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1368 break;
1369 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1370 } while (exception.retry);
1371 return err;
1372}
1373
864472e9
TM		 1374static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1375{
1376 struct nfs_open_context *ctx;
1377 int ret;
1378
1379 ctx = nfs4_state_find_open_context(state);
1380 if (IS_ERR(ctx))
91876b13 1381 return -EAGAIN;
539cd03a 1382 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1383 put_nfs_open_context(ctx);
1384 return ret;
1385}
1386
db4f2e63 1387static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1388{
be76b5b6
TM		 1389 switch (err) {
1390 default:
1391 printk(KERN_ERR "NFS: %s: unhandled error "
1392 "%d.\n", __func__, err);
1393 case 0:
1394 case -ENOENT:
1395 case -ESTALE:
1396 break;
1397 case -NFS4ERR_BADSESSION:
1398 case -NFS4ERR_BADSLOT:
1399 case -NFS4ERR_BAD_HIGH_SLOT:
1400 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1401 case -NFS4ERR_DEADSESSION:
1402 set_bit(NFS_DELEGATED_STATE, &state->flags);
1403 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1404 return -EAGAIN;
1405 case -NFS4ERR_STALE_CLIENTID:
1406 case -NFS4ERR_STALE_STATEID:
1407 set_bit(NFS_DELEGATED_STATE, &state->flags);
1408 case -NFS4ERR_EXPIRED:
1409 /* Don't recall a delegation if it was lost */
1410 nfs4_schedule_lease_recovery(server->nfs_client);
1411 return -EAGAIN;
1412 case -NFS4ERR_DELEG_REVOKED:
1413 case -NFS4ERR_ADMIN_REVOKED:
1414 case -NFS4ERR_BAD_STATEID:
db4f2e63 1415 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1416 nfs_inode_find_state_and_recover(state->inode,
1417 stateid);
1418 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1419 return 0;
1420 case -NFS4ERR_DELAY:
1421 case -NFS4ERR_GRACE:
1422 set_bit(NFS_DELEGATED_STATE, &state->flags);
1423 ssleep(1);
1424 return -EAGAIN;
db4f2e63
TM		 1425 case -ENOMEM:
1426 case -NFS4ERR_DENIED:
1427 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1428 return 0;
be76b5b6 1429 }
1da177e4
LT		 1430 return err;
1431}
1432
db4f2e63
TM		 1433int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1434{
1435 struct nfs_server *server = NFS_SERVER(state->inode);
1436 struct nfs4_opendata *opendata;
1437 int err;
1438
1439 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1440 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1441 if (IS_ERR(opendata))
1442 return PTR_ERR(opendata);
1443 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1444 err = nfs4_open_recover(opendata, state);
1445 nfs4_opendata_put(opendata);
1446 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1447}
1448
cdd4e68b
TM		 1449static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1450{
1451 struct nfs4_opendata *data = calldata;
1452
1453 data->rpc_status = task->tk_status;
26e976a8 1454 if (data->rpc_status == 0) {
f597c537 1455 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1456 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1457 renew_lease(data->o_res.server, data->timestamp);
3e309914 1458 data->rpc_done = 1;
26e976a8 1459 }
cdd4e68b
TM		 1460}
1461
1462static void nfs4_open_confirm_release(void *calldata)
1463{
1464 struct nfs4_opendata *data = calldata;
1465 struct nfs4_state *state = NULL;
1466
1467 /* If this request hasn't been cancelled, do nothing */
1468 if (data->cancelled == 0)
1469 goto out_free;
1470 /* In case of error, no cleanup! */
3e309914 1471 if (!data->rpc_done)
cdd4e68b 1472 goto out_free;
cdd4e68b 1473 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1474 if (!IS_ERR(state))
643168c2 1475 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1476out_free:
c6d00e63 1477 nfs4_opendata_put(data);
cdd4e68b
TM		 1478}
1479
1480static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1481 .rpc_call_done = nfs4_open_confirm_done,
1482 .rpc_release = nfs4_open_confirm_release,
1483};
1484
1485/*
1486 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1487 */
1488static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1489{
1490 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1491 struct rpc_task *task;
5138fde0
TM		 1492 struct rpc_message msg = {
1493 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1494 .rpc_argp = &data->c_arg,
1495 .rpc_resp = &data->c_res,
1496 .rpc_cred = data->owner->so_cred,
1497 };
c970aa85
TM		 1498 struct rpc_task_setup task_setup_data = {
1499 .rpc_client = server->client,
5138fde0 1500 .rpc_message = &msg,
c970aa85
TM		 1501 .callback_ops = &nfs4_open_confirm_ops,
1502 .callback_data = data,
101070ca 1503 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1504 .flags = RPC_TASK_ASYNC,
1505 };
1da177e4
LT		 1506 int status;
1507
c6d00e63 1508 kref_get(&data->kref);
3e309914
TM		 1509 data->rpc_done = 0;
1510 data->rpc_status = 0;
5138fde0 1511 data->timestamp = jiffies;
c970aa85 1512 task = rpc_run_task(&task_setup_data);
7a1218a2 1513 if (IS_ERR(task))
cdd4e68b 1514 return PTR_ERR(task);
cdd4e68b
TM		 1515 status = nfs4_wait_for_completion_rpc_task(task);
1516 if (status != 0) {
1517 data->cancelled = 1;
1518 smp_wmb();
1519 } else
1520 status = data->rpc_status;
e6b3c4db 1521 rpc_put_task(task);
1da177e4
LT		 1522 return status;
1523}
1524
24ac23ab 1525static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1526{
24ac23ab
TM		 1527 struct nfs4_opendata *data = calldata;
1528 struct nfs4_state_owner *sp = data->owner;
549b19cc 1529 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1530
24ac23ab 1531 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1532 goto out_wait;
aac00a8d
TM		 1533 /*
1534 * Check if we still need to send an OPEN call, or if we can use
1535 * a delegation instead.
1536 */
1537 if (data->state != NULL) {
1538 struct nfs_delegation *delegation;
1539
dc0b027d 1540 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1541 goto out_no_action;
aac00a8d
TM		 1542 rcu_read_lock();
1543 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1544 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1545 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1546 can_open_delegated(delegation, data->o_arg.fmode))
1547 goto unlock_no_action;
aac00a8d
TM		 1548 rcu_read_unlock();
1549 }
95b72eb0 1550 /* Update client id. */
549b19cc 1551 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1552 switch (data->o_arg.claim) {
1553 case NFS4_OPEN_CLAIM_PREVIOUS:
1554 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1555 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1556 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1557 case NFS4_OPEN_CLAIM_FH:
1558 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1559 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1560 }
26e976a8 1561 data->timestamp = jiffies;
035168ab 1562 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1563 &data->o_arg.seq_args,
2240a9e2
TM		 1564 &data->o_res.seq_res,
1565 task) != 0)
1566 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1567
1568 /* Set the create mode (note dependency on the session type) */
1569 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1570 if (data->o_arg.open_flags & O_EXCL) {
1571 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1572 if (nfs4_has_persistent_session(clp))
1573 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1574 else if (clp->cl_mvops->minor_version > 0)
1575 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1576 }
6ee41268 1577 return;
652f89f6
TM		 1578unlock_no_action:
1579 rcu_read_unlock();
6ee41268
TM		 1580out_no_action:
1581 task->tk_action = NULL;
c8da19b9 1582out_wait:
b75ad4cd 1583 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1584}
1585
24ac23ab
TM		 1586static void nfs4_open_done(struct rpc_task *task, void *calldata)
1587{
1588 struct nfs4_opendata *data = calldata;
1da177e4 1589
24ac23ab 1590 data->rpc_status = task->tk_status;
d898528c 1591
14516c3a
TM		 1592 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1593 return;
d898528c 1594
24ac23ab 1595 if (task->tk_status == 0) {
807d66d8
TM		 1596 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1597 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1598 case S_IFREG:
1599 break;
1600 case S_IFLNK:
24ac23ab 1601 data->rpc_status = -ELOOP;
6f926b5b
TM		 1602 break;
1603 case S_IFDIR:
24ac23ab 1604 data->rpc_status = -EISDIR;
6f926b5b
TM		 1605 break;
1606 default:
24ac23ab 1607 data->rpc_status = -ENOTDIR;
807d66d8 1608 }
6f926b5b 1609 }
26e976a8 1610 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1611 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1612 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1613 }
3e309914 1614 data->rpc_done = 1;
24ac23ab 1615}
6f926b5b 1616
24ac23ab
TM		 1617static void nfs4_open_release(void *calldata)
1618{
1619 struct nfs4_opendata *data = calldata;
1620 struct nfs4_state *state = NULL;
1621
1622 /* If this request hasn't been cancelled, do nothing */
1623 if (data->cancelled == 0)
1624 goto out_free;
1625 /* In case of error, no cleanup! */
3e309914 1626 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1627 goto out_free;
1628 /* In case we need an open_confirm, no cleanup! */
1629 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1630 goto out_free;
24ac23ab 1631 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1632 if (!IS_ERR(state))
643168c2 1633 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1634out_free:
c6d00e63 1635 nfs4_opendata_put(data);
24ac23ab
TM		 1636}
1637
1638static const struct rpc_call_ops nfs4_open_ops = {
1639 .rpc_call_prepare = nfs4_open_prepare,
1640 .rpc_call_done = nfs4_open_done,
1641 .rpc_release = nfs4_open_release,
1642};
1643
b257957e 1644static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1645{
1646 struct inode *dir = data->dir->d_inode;
1647 struct nfs_server *server = NFS_SERVER(dir);
1648 struct nfs_openargs *o_arg = &data->o_arg;
1649 struct nfs_openres *o_res = &data->o_res;
1650 struct rpc_task *task;
5138fde0
TM		 1651 struct rpc_message msg = {
1652 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1653 .rpc_argp = o_arg,
1654 .rpc_resp = o_res,
1655 .rpc_cred = data->owner->so_cred,
1656 };
c970aa85
TM		 1657 struct rpc_task_setup task_setup_data = {
1658 .rpc_client = server->client,
5138fde0 1659 .rpc_message = &msg,
c970aa85
TM		 1660 .callback_ops = &nfs4_open_ops,
1661 .callback_data = data,
101070ca 1662 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1663 .flags = RPC_TASK_ASYNC,
1664 };
24ac23ab
TM		 1665 int status;
1666
9d12b216 1667 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1668 kref_get(&data->kref);
3e309914
TM		 1669 data->rpc_done = 0;
1670 data->rpc_status = 0;
2ced46c2 1671 data->cancelled = 0;
bdeca1b7
TM		 1672 data->is_recover = 0;
1673 if (isrecover) {
8fe72bac 1674 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1675 data->is_recover = 1;
1676 }
c970aa85 1677 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1678 if (IS_ERR(task))
1679 return PTR_ERR(task);
1680 status = nfs4_wait_for_completion_rpc_task(task);
1681 if (status != 0) {
1682 data->cancelled = 1;
1683 smp_wmb();
1684 } else
1685 status = data->rpc_status;
1686 rpc_put_task(task);
1687
1688 return status;
1689}
1690
1691static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1692{
1693 struct inode *dir = data->dir->d_inode;
1694 struct nfs_openres *o_res = &data->o_res;
1695 int status;
1696
1697 status = nfs4_run_open_task(data, 1);
1698 if (status != 0 || !data->rpc_done)
1699 return status;
1700
6926afd1
TM		 1701 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1702
b257957e
AB		 1703 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1704 status = _nfs4_proc_open_confirm(data);
1705 if (status != 0)
1706 return status;
1707 }
1708
1709 return status;
1710}
1711
6168f62c
WAA		 1712static int nfs4_opendata_access(struct rpc_cred *cred,
1713 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1714 struct nfs4_state *state, fmode_t fmode,
1715 int openflags)
6168f62c
WAA		 1716{
1717 struct nfs_access_entry cache;
1718 u32 mask;
1719
1720 /* access call failed or for some reason the server doesn't
1721 * support any access modes -- defer access call until later */
1722 if (opendata->o_res.access_supported == 0)
1723 return 0;
1724
1725 mask = 0;
bbd3a8ee 1726 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1727 * write mode bits, but POSIX allows the creating process to write.
1728 * use openflags to check for exec, because fmode won't
1729 * always have FMODE_EXEC set when file open for exec. */
1730 if (openflags & __FMODE_EXEC) {
1731 /* ONLY check for exec rights */
1732 mask = MAY_EXEC;
1733 } else if (fmode & FMODE_READ)
1734 mask = MAY_READ;
6168f62c
WAA		 1735
1736 cache.cred = cred;
1737 cache.jiffies = jiffies;
1738 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1739 nfs_access_add_cache(state->inode, &cache);
1740
bbd3a8ee 1741 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1742 return 0;
1743
1744 /* even though OPEN succeeded, access is denied. Close the file */
1745 nfs4_close_state(state, fmode);
998f40b5 1746 return -EACCES;
6168f62c
WAA		 1747}
1748
b257957e
AB		 1749/*
1750 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1751 */
1752static int _nfs4_proc_open(struct nfs4_opendata *data)
1753{
1754 struct inode *dir = data->dir->d_inode;
1755 struct nfs_server *server = NFS_SERVER(dir);
1756 struct nfs_openargs *o_arg = &data->o_arg;
1757 struct nfs_openres *o_res = &data->o_res;
1758 int status;
1759
1760 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1761 if (!data->rpc_done)
1762 return status;
1763 if (status != 0) {
1764 if (status == -NFS4ERR_BADNAME &&
1765 !(o_arg->open_flags & O_CREAT))
1766 return -ENOENT;
24ac23ab 1767 return status;
08ef7bd3 1768 }
24ac23ab 1769
6926afd1
TM		 1770 nfs_fattr_map_and_free_names(server, &data->f_attr);
1771
90ff0c54 1772 if (o_arg->open_flags & O_CREAT)
56ae19f3 1773 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1774 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1775 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1776 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1777 status = _nfs4_proc_open_confirm(data);
1da177e4 1778 if (status != 0)
24ac23ab 1779 return status;
1da177e4
LT		 1780 }
1781 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1782 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1783 return 0;
1da177e4
LT		 1784}
1785
d83217c1
AA		 1786static int nfs4_recover_expired_lease(struct nfs_server *server)
1787{
1788 return nfs4_client_recover_expired_lease(server->nfs_client);
1789}
1790
1da177e4
LT		 1791/*
1792 * OPEN_EXPIRED:
1793 * reclaim state on the server after a network partition.
1794 * Assumes caller holds the appropriate lock
1795 */
539cd03a 1796static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1797{
e56e0b78 1798 struct nfs4_opendata *opendata;
864472e9 1799 int ret;
1da177e4 1800
4a1c0893 1801 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1802 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1803 if (IS_ERR(opendata))
1804 return PTR_ERR(opendata);
864472e9 1805 ret = nfs4_open_recover(opendata, state);
35d05778 1806 if (ret == -ESTALE)
3d4ff43d 1807 d_drop(ctx->dentry);
c6d00e63 1808 nfs4_opendata_put(opendata);
864472e9 1809 return ret;
1da177e4
LT		 1810}
1811
a9ed2e25 1812static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1813{
539cd03a 1814 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1815 struct nfs4_exception exception = { };
1816 int err;
1817
1818 do {
539cd03a 1819 err = _nfs4_open_expired(ctx, state);
49f9a0fa
TM		 1820 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1821 continue;
a9ed2e25
TM		 1822 switch (err) {
1823 default:
1824 goto out;
1825 case -NFS4ERR_GRACE:
1826 case -NFS4ERR_DELAY:
1827 nfs4_handle_exception(server, err, &exception);
1828 err = 0;
1829 }
202b50dc 1830 } while (exception.retry);
a9ed2e25 1831out:
202b50dc
TM		 1832 return err;
1833}
1834
1da177e4
LT		 1835static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1836{
1da177e4 1837 struct nfs_open_context *ctx;
864472e9 1838 int ret;
1da177e4 1839
864472e9
TM		 1840 ctx = nfs4_state_find_open_context(state);
1841 if (IS_ERR(ctx))
91876b13 1842 return -EAGAIN;
539cd03a 1843 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1844 put_nfs_open_context(ctx);
1845 return ret;
1da177e4
LT		 1846}
1847
f062eb6c 1848#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1849static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1850{
f062eb6c 1851 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1852 nfs4_stateid *stateid = &state->stateid;
1853 int status;
1854
1855 /* If a state reset has been done, test_stateid is unneeded */
1856 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1857 return;
1858
1859 status = nfs41_test_stateid(server, stateid);
1860 if (status != NFS_OK) {
1861 /* Free the stateid unless the server explicitly
1862 * informs us the stateid is unrecognized. */
1863 if (status != -NFS4ERR_BAD_STATEID)
1864 nfs41_free_stateid(server, stateid);
6938867e 1865 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1866
6938867e
BS		 1867 write_seqlock(&state->seqlock);
1868 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1869 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1870 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1871 }
1872}
1873
1874/**
1875 * nfs41_check_open_stateid - possibly free an open stateid
1876 *
1877 * @state: NFSv4 state for an inode
1878 *
1879 * Returns NFS_OK if recovery for this stateid is now finished.
1880 * Otherwise a negative NFS4ERR value is returned.
1881 */
1882static int nfs41_check_open_stateid(struct nfs4_state *state)
1883{
1884 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1885 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1886 int status;
1887
1888 /* If a state reset has been done, test_stateid is unneeded */
1889 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1890 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1891 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1892 return -NFS4ERR_BAD_STATEID;
1893
1894 status = nfs41_test_stateid(server, stateid);
1895 if (status != NFS_OK) {
1896 /* Free the stateid unless the server explicitly
1897 * informs us the stateid is unrecognized. */
1898 if (status != -NFS4ERR_BAD_STATEID)
1899 nfs41_free_stateid(server, stateid);
1900
1901 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1902 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1903 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 1904 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 1905 }
1906 return status;
1907}
1908
1909static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1910{
eb64cf96 1911 int status;
b01dd1d8 1912
3e60ffdd
CL		 1913 nfs41_clear_delegation_stateid(state);
1914 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1915 if (status != NFS_OK)
1916 status = nfs4_open_expired(sp, state);
1917 return status;
f062eb6c
BS		 1918}
1919#endif
1920
aa53ed54
JL		 1921/*
1922 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1923 * fields corresponding to attributes that were used to store the verifier.
1924 * Make sure we clobber those fields in the later setattr call
1925 */
1926static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1927{
1928 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1929 !(sattr->ia_valid & ATTR_ATIME_SET))
1930 sattr->ia_valid |= ATTR_ATIME;
1931
1932 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1933 !(sattr->ia_valid & ATTR_MTIME_SET))
1934 sattr->ia_valid |= ATTR_MTIME;
1935}
1936
c21443c2
TM		 1937static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1938 fmode_t fmode,
1939 int flags,
1940 struct nfs4_state **res)
1941{
1942 struct nfs4_state_owner *sp = opendata->owner;
1943 struct nfs_server *server = sp->so_server;
1944 struct nfs4_state *state;
1945 unsigned int seq;
1946 int ret;
1947
1948 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1949
1950 ret = _nfs4_proc_open(opendata);
1951 if (ret != 0)
1952 goto out;
1953
1954 state = nfs4_opendata_to_nfs4_state(opendata);
1955 ret = PTR_ERR(state);
1956 if (IS_ERR(state))
1957 goto out;
1958 if (server->caps & NFS_CAP_POSIX_LOCK)
1959 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1960
1961 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1962 if (ret != 0)
1963 goto out;
1964
91876b13 1965 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
c21443c2 1966 nfs4_schedule_stateid_recovery(server, state);
c21443c2
TM		 1967 *res = state;
1968out:
1969 return ret;
1970}
1971
1da177e4 1972/*
24ac23ab 1973 * Returns a referenced nfs4_state
1da177e4 1974 */
82be417a
AA		 1975static int _nfs4_do_open(struct inode *dir,
1976 struct dentry *dentry,
1977 fmode_t fmode,
1978 int flags,
1979 struct iattr *sattr,
1980 struct rpc_cred *cred,
1981 struct nfs4_state **res,
1982 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1983{
1984 struct nfs4_state_owner *sp;
1985 struct nfs4_state *state = NULL;
1986 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1987 struct nfs4_opendata *opendata;
49f9a0fa 1988 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
aac00a8d 1989 int status;
1da177e4
LT		 1990
1991 /* Protect against reboot recovery conflicts */
1da177e4 1992 status = -ENOMEM;
d1e284d5
TM		 1993 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1994 if (sp == NULL) {
1da177e4
LT		 1995 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1996 goto out_err;
1997 }
58d9714a
TM		 1998 status = nfs4_recover_expired_lease(server);
1999 if (status != 0)
b4454fe1 2000 goto err_put_state_owner;
82a2c1b7
AV		 2001 if (dentry->d_inode != NULL)
2002 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2003 status = -ENOMEM;
49f9a0fa
TM		 2004 if (dentry->d_inode)
2005 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2006 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
49f9a0fa 2007 claim, GFP_KERNEL);
e56e0b78 2008 if (opendata == NULL)
95d35cb4 2009 goto err_put_state_owner;
1da177e4 2010
82be417a
AA		 2011 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2012 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2013 if (!opendata->f_attr.mdsthreshold)
2014 goto err_opendata_put;
1549210f 2015 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2016 }
82a2c1b7
AV		 2017 if (dentry->d_inode != NULL)
2018 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2019
c21443c2 2020 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
6168f62c
WAA		 2021 if (status != 0)
2022 goto err_opendata_put;
2023
549b19cc
TM		 2024 if ((opendata->o_arg.open_flags & O_EXCL) &&
2025 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2026 nfs4_exclusive_attrset(opendata, sattr);
2027
2028 nfs_fattr_init(opendata->o_res.f_attr);
2029 status = nfs4_do_setattr(state->inode, cred,
2030 opendata->o_res.f_attr, sattr,
2031 state);
2032 if (status == 0)
2033 nfs_setattr_update_inode(state->inode, sattr);
2034 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2035 }
82be417a
AA		 2036
2037 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2038 *ctx_th = opendata->f_attr.mdsthreshold;
2039 else
2040 kfree(opendata->f_attr.mdsthreshold);
2041 opendata->f_attr.mdsthreshold = NULL;
2042
c6d00e63 2043 nfs4_opendata_put(opendata);
1da177e4 2044 nfs4_put_state_owner(sp);
1da177e4
LT		 2045 *res = state;
2046 return 0;
c6d00e63 2047err_opendata_put:
82be417a 2048 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2049 nfs4_opendata_put(opendata);
e56e0b78
TM		 2050err_put_state_owner:
2051 nfs4_put_state_owner(sp);
1da177e4 2052out_err:
1da177e4
LT		 2053 *res = NULL;
2054 return status;
2055}
2056
2057
82be417a
AA		 2058static struct nfs4_state *nfs4_do_open(struct inode *dir,
2059 struct dentry *dentry,
2060 fmode_t fmode,
2061 int flags,
2062 struct iattr *sattr,
2063 struct rpc_cred *cred,
2064 struct nfs4_threshold **ctx_th)
1da177e4 2065{
49f9a0fa 2066 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2067 struct nfs4_exception exception = { };
2068 struct nfs4_state *res;
2069 int status;
2070
6168f62c 2071 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 2072 do {
82be417a
AA		 2073 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
2074 &res, ctx_th);
1da177e4
LT		 2075 if (status == 0)
2076 break;
2077 /* NOTE: BAD_SEQID means the server and client disagree about the
2078 * book-keeping w.r.t. state-changing operations
2079 * (OPEN/CLOSE/LOCK/LOCKU...)
2080 * It is actually a sign of a bug on the client or on the server.
2081 *
2082 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2083 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2084 * have unhashed the old state_owner for us, and that we can
2085 * therefore safely retry using a new one. We should still warn
2086 * the user though...
2087 */
2088 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2089 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2090 " returned a bad sequence-id error!\n",
2091 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2092 exception.retry = 1;
2093 continue;
2094 }
550f5747
TM		 2095 /*
2096 * BAD_STATEID on OPEN means that the server cancelled our
2097 * state before it received the OPEN_CONFIRM.
2098 * Recover by retrying the request as per the discussion
2099 * on Page 181 of RFC3530.
2100 */
2101 if (status == -NFS4ERR_BAD_STATEID) {
2102 exception.retry = 1;
2103 continue;
2104 }
aac00a8d
TM		 2105 if (status == -EAGAIN) {
2106 /* We must have found a delegation */
2107 exception.retry = 1;
2108 continue;
2109 }
49f9a0fa
TM		 2110 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2111 continue;
2112 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2113 status, &exception));
2114 } while (exception.retry);
2115 return res;
2116}
2117
659bfcd6
TM		 2118static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2119 struct nfs_fattr *fattr, struct iattr *sattr,
2120 struct nfs4_state *state)
1da177e4 2121{
3e4f6290 2122 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2123 struct nfs_setattrargs arg = {
3e4f6290 2124 .fh = NFS_FH(inode),
1da177e4
LT		 2125 .iap = sattr,
2126 .server = server,
2127 .bitmask = server->attr_bitmask,
2128 };
2129 struct nfs_setattrres res = {
2130 .fattr = fattr,
2131 .server = server,
2132 };
2133 struct rpc_message msg = {
659bfcd6
TM		 2134 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2135 .rpc_argp = &arg,
2136 .rpc_resp = &res,
2137 .rpc_cred = cred,
1da177e4 2138 };
26e976a8 2139 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2140 fmode_t fmode;
2141 bool truncate;
65e4308d 2142 int status;
1da177e4 2143
0e574af1 2144 nfs_fattr_init(fattr);
1da177e4 2145
ee3ae84e
TM		 2146 /* Servers should only apply open mode checks for file size changes */
2147 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2148 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2149
2150 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2151 /* Use that stateid */
2152 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2153 struct nfs_lockowner lockowner = {
2154 .l_owner = current->files,
2155 .l_pid = current->tgid,
2156 };
4fc8796d 2157 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2158 &lockowner);
08e9eac4 2159 } else
f597c537 2160 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2161
7c513058 2162 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2163 if (status == 0 && state != NULL)
2164 renew_lease(server, timestamp);
65e4308d 2165 return status;
1da177e4
LT		 2166}
2167
659bfcd6
TM		 2168static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2169 struct nfs_fattr *fattr, struct iattr *sattr,
2170 struct nfs4_state *state)
1da177e4 2171{
3e4f6290 2172 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2173 struct nfs4_exception exception = {
2174 .state = state,
3114ea7a 2175 .inode = inode,
a1d0b5ee 2176 };
1da177e4
LT		 2177 int err;
2178 do {
451146be
TM		 2179 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2180 switch (err) {
2181 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2182 if (!(sattr->ia_valid & ATTR_SIZE)) {
2183 pr_warn_once("NFSv4: server %s is incorrectly "
2184 "applying open mode checks to "
2185 "a SETATTR that is not "
2186 "changing file size.\n",
2187 server->nfs_client->cl_hostname);
2188 }
451146be
TM		 2189 if (state && !(state->state & FMODE_WRITE)) {
2190 err = -EBADF;
2191 if (sattr->ia_valid & ATTR_OPEN)
2192 err = -EACCES;
2193 goto out;
2194 }
2195 }
2196 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2197 } while (exception.retry);
451146be 2198out:
1da177e4
LT		 2199 return err;
2200}
2201
2202struct nfs4_closedata {
2203 struct inode *inode;
2204 struct nfs4_state *state;
2205 struct nfs_closeargs arg;
2206 struct nfs_closeres res;
516a6af6 2207 struct nfs_fattr fattr;
26e976a8 2208 unsigned long timestamp;
f7e8917a
FI		 2209 bool roc;
2210 u32 roc_barrier;
1da177e4
LT		 2211};
2212
963d8fe5 2213static void nfs4_free_closedata(void *data)
9512135d 2214{
963d8fe5
TM		 2215 struct nfs4_closedata *calldata = data;
2216 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2217 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2218
f7e8917a
FI		 2219 if (calldata->roc)
2220 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2221 nfs4_put_open_state(calldata->state);
2222 nfs_free_seqid(calldata->arg.seqid);
9512135d 2223 nfs4_put_state_owner(sp);
322b2b90 2224 nfs_sb_deactive(sb);
9512135d
TM		 2225 kfree(calldata);
2226}
2227
88069f77
TM		 2228static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2229 fmode_t fmode)
2230{
2231 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2232 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2233 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2234 case FMODE_WRITE:
88069f77 2235 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2236 break;
2237 case FMODE_READ:
88069f77 2238 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2239 break;
2240 case 0:
2241 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2242 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2243 clear_bit(NFS_OPEN_STATE, &state->flags);
2244 }
88069f77
TM		 2245 spin_unlock(&state->owner->so_lock);
2246}
2247
963d8fe5 2248static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2249{
963d8fe5 2250 struct nfs4_closedata *calldata = data;
1da177e4 2251 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2252 struct nfs_server *server = NFS_SERVER(calldata->inode);
2253
a3ca5651 2254 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2255 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2256 return;
1da177e4
LT		 2257 /* hmm. we are done with the inode, and in the process of freeing
2258 * the state_owner. we keep this around to process errors
2259 */
1da177e4
LT		 2260 switch (task->tk_status) {
2261 case 0:
f7e8917a
FI		 2262 if (calldata->roc)
2263 pnfs_roc_set_barrier(state->inode,
2264 calldata->roc_barrier);
45328c35 2265 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2266 renew_lease(server, calldata->timestamp);
88069f77
TM		 2267 nfs4_close_clear_stateid_flags(state,
2268 calldata->arg.fmode);
1da177e4
LT		 2269 break;
2270 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2271 case -NFS4ERR_OLD_STATEID:
2272 case -NFS4ERR_BAD_STATEID:
1da177e4 2273 case -NFS4ERR_EXPIRED:
dc0b027d 2274 if (calldata->arg.fmode == 0)
9e33bed5 2275 break;
1da177e4 2276 default:
72211dbe
TM		 2277 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2278 rpc_restart_call_prepare(task);
1da177e4 2279 }
72211dbe 2280 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2281 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2282 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2283}
2284
4ce70ada 2285static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2286{
4ce70ada 2287 struct nfs4_closedata *calldata = data;
9512135d 2288 struct nfs4_state *state = calldata->state;
7fdab069 2289 struct inode *inode = calldata->inode;
88069f77 2290 int call_close = 0;
9512135d 2291
a3ca5651 2292 dprintk("%s: begin!\n", __func__);
963d8fe5 2293 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2294 goto out_wait;
003707c7 2295
88069f77
TM		 2296 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2297 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2298 spin_lock(&state->owner->so_lock);
003707c7 2299 /* Calculate the change in open mode */
e7616923 2300 if (state->n_rdwr == 0) {
003707c7 2301 if (state->n_rdonly == 0) {
88069f77
TM		 2302 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2303 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2304 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2305 }
2306 if (state->n_wronly == 0) {
88069f77
TM		 2307 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2308 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2309 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2310 }
e7616923 2311 }
5d422301
TM		 2312 if (!nfs4_valid_open_stateid(state))
2313 call_close = 0;
4cecb76f 2314 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2315
2316 if (!call_close) {
963d8fe5 2317 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2318 goto out_no_action;
9512135d 2319 }
88069f77 2320
f7e8917a 2321 if (calldata->arg.fmode == 0) {
88069f77 2322 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2323 if (calldata->roc &&
b9536ad5
AA		 2324 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2325 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2326 goto out_wait;
b9536ad5 2327 }
f7e8917a 2328 }
88069f77 2329
516a6af6 2330 nfs_fattr_init(calldata->res.fattr);
26e976a8 2331 calldata->timestamp = jiffies;
7fdab069 2332 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2333 &calldata->arg.seq_args,
2334 &calldata->res.seq_res,
2240a9e2
TM		 2335 task) != 0)
2336 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2337 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2338 return;
2339out_no_action:
2340 task->tk_action = NULL;
2341out_wait:
2342 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2343}
2344
963d8fe5 2345static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2346 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2347 .rpc_call_done = nfs4_close_done,
2348 .rpc_release = nfs4_free_closedata,
2349};
2350
1da177e4
LT		 2351/*
2352 * It is possible for data to be read/written from a mem-mapped file
2353 * after the sys_close call (which hits the vfs layer as a flush).
2354 * This means that we can't safely call nfsv4 close on a file until
2355 * the inode is cleared. This in turn means that we are not good
2356 * NFSv4 citizens - we do not indicate to the server to update the file's
2357 * share state even when we are done with one of the three share
2358 * stateid's in the inode.
2359 *
2360 * NOTE: Caller must be holding the sp->so_owner semaphore!
2361 */
1f7977c1 2362int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2363{
4a35bd41 2364 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2365 struct nfs4_closedata *calldata;
b39e625b
TM		 2366 struct nfs4_state_owner *sp = state->owner;
2367 struct rpc_task *task;
5138fde0
TM		 2368 struct rpc_message msg = {
2369 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2370 .rpc_cred = state->owner->so_cred,
2371 };
c970aa85
TM		 2372 struct rpc_task_setup task_setup_data = {
2373 .rpc_client = server->client,
5138fde0 2374 .rpc_message = &msg,
c970aa85 2375 .callback_ops = &nfs4_close_ops,
101070ca 2376 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2377 .flags = RPC_TASK_ASYNC,
2378 };
9512135d 2379 int status = -ENOMEM;
1da177e4 2380
8535b2be 2381 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2382 if (calldata == NULL)
9512135d 2383 goto out;
9d12b216 2384 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2385 calldata->inode = state->inode;
1da177e4 2386 calldata->state = state;
4a35bd41 2387 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2388 calldata->arg.stateid = &state->open_stateid;
1da177e4 2389 /* Serialization for the sequence id */
8535b2be 2390 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2391 if (calldata->arg.seqid == NULL)
2392 goto out_free_calldata;
dc0b027d 2393 calldata->arg.fmode = 0;
a65318bf 2394 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2395 calldata->res.fattr = &calldata->fattr;
c1d51931 2396 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2397 calldata->res.server = server;
1f7977c1 2398 calldata->roc = pnfs_roc(state->inode);
643168c2 2399 nfs_sb_active(calldata->inode->i_sb);
9512135d 2400
1174dd1f
TM		 2401 msg.rpc_argp = &calldata->arg;
2402 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2403 task_setup_data.callback_data = calldata;
2404 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2405 if (IS_ERR(task))
2406 return PTR_ERR(task);
a49c3c77
TM		 2407 status = 0;
2408 if (wait)
2409 status = rpc_wait_for_completion_task(task);
b39e625b 2410 rpc_put_task(task);
a49c3c77 2411 return status;
9512135d
TM		 2412out_free_calldata:
2413 kfree(calldata);
2414out:
b39e625b
TM		 2415 nfs4_put_open_state(state);
2416 nfs4_put_state_owner(sp);
9512135d 2417 return status;
1da177e4
LT		 2418}
2419
2b484297 2420static struct inode *
cd9a1c0e 2421nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2422{
1da177e4 2423 struct nfs4_state *state;
1da177e4 2424
565277f6 2425 /* Protect against concurrent sillydeletes */
82be417a
AA		 2426 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2427 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2428 if (IS_ERR(state))
2429 return ERR_CAST(state);
cd9a1c0e 2430 ctx->state = state;
f46e0bd3 2431 return igrab(state->inode);
1da177e4
LT		 2432}
2433
1185a552 2434static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2435{
2436 if (ctx->state == NULL)
2437 return;
2438 if (is_sync)
643168c2 2439 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2440 else
643168c2 2441 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2442}
1da177e4
LT		 2443
2444static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2445{
43652ad5
BH		 2446 struct nfs4_server_caps_arg args = {
2447 .fhandle = fhandle,
2448 };
1da177e4
LT		 2449 struct nfs4_server_caps_res res = {};
2450 struct rpc_message msg = {
2451 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2452 .rpc_argp = &args,
1da177e4
LT		 2453 .rpc_resp = &res,
2454 };
2455 int status;
2456
7c513058 2457 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2458 if (status == 0) {
2459 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2460 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2461 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2462 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2463 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2464 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2465 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2466 server->caps |= NFS_CAP_ACLS;
2467 if (res.has_links != 0)
2468 server->caps |= NFS_CAP_HARDLINKS;
2469 if (res.has_symlinks != 0)
2470 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2471 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2472 server->caps |= NFS_CAP_FILEID;
2473 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2474 server->caps |= NFS_CAP_MODE;
2475 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2476 server->caps |= NFS_CAP_NLINK;
2477 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2478 server->caps |= NFS_CAP_OWNER;
2479 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2480 server->caps |= NFS_CAP_OWNER_GROUP;
2481 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2482 server->caps |= NFS_CAP_ATIME;
2483 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2484 server->caps |= NFS_CAP_CTIME;
2485 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2486 server->caps |= NFS_CAP_MTIME;
2487
a65318bf
TM		 2488 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2489 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2490 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2491 server->acl_bitmask = res.acl_bitmask;
264e6351 2492 server->fh_expire_type = res.fh_expire_type;
1da177e4 2493 }
cccef3b9 2494
1da177e4
LT		 2495 return status;
2496}
2497
55a97593 2498int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2499{
2500 struct nfs4_exception exception = { };
2501 int err;
2502 do {
2503 err = nfs4_handle_exception(server,
2504 _nfs4_server_capabilities(server, fhandle),
2505 &exception);
2506 } while (exception.retry);
2507 return err;
2508}
2509
2510static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2511 struct nfs_fsinfo *info)
2512{
1da177e4
LT		 2513 struct nfs4_lookup_root_arg args = {
2514 .bitmask = nfs4_fattr_bitmap,
2515 };
2516 struct nfs4_lookup_res res = {
2517 .server = server,
0e574af1 2518 .fattr = info->fattr,
1da177e4
LT		 2519 .fh = fhandle,
2520 };
2521 struct rpc_message msg = {
2522 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2523 .rpc_argp = &args,
2524 .rpc_resp = &res,
2525 };
008f55d0 2526
0e574af1 2527 nfs_fattr_init(info->fattr);
7c513058 2528 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2529}
2530
2531static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2532 struct nfs_fsinfo *info)
2533{
2534 struct nfs4_exception exception = { };
2535 int err;
2536 do {
fb8a5ba8
BS		 2537 err = _nfs4_lookup_root(server, fhandle, info);
2538 switch (err) {
2539 case 0:
2540 case -NFS4ERR_WRONGSEC:
05e9cfb4 2541 goto out;
fb8a5ba8
BS		 2542 default:
2543 err = nfs4_handle_exception(server, err, &exception);
2544 }
1da177e4 2545 } while (exception.retry);
05e9cfb4 2546out:
1da177e4
LT		 2547 return err;
2548}
2549
8f70e95f
BS		 2550static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2551 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2552{
2553 struct rpc_auth *auth;
2554 int ret;
2555
2556 auth = rpcauth_create(flavor, server->client);
e8d920c5 2557 if (IS_ERR(auth)) {
75bc8821 2558 ret = -EACCES;
8f70e95f
BS		 2559 goto out;
2560 }
2561 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2562out:
2563 return ret;
2564}
2565
9a744ba3
CL		 2566/*
2567 * Retry pseudoroot lookup with various security flavors. We do this when:
2568 *
2569 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2570 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2571 *
2572 * Returns zero on success, or a negative NFS4ERR value, or a
2573 * negative errno value.
2574 */
801a16dc 2575static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2576 struct nfs_fsinfo *info)
1da177e4 2577{
9a744ba3
CL		 2578 /* Per 3530bis 15.33.5 */
2579 static const rpc_authflavor_t flav_array[] = {
2580 RPC_AUTH_GSS_KRB5P,
2581 RPC_AUTH_GSS_KRB5I,
2582 RPC_AUTH_GSS_KRB5,
c4eafe11 2583 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2584 RPC_AUTH_NULL,
2585 };
2586 int status = -EPERM;
2587 size_t i;
6a1a1e34 2588
9a744ba3 2589 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2590 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2591 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2592 continue;
2593 break;
8f70e95f 2594 }
9a744ba3 2595
fb8a5ba8
BS		 2596 /*
2597 * -EACCESS could mean that the user doesn't have correct permissions
2598 * to access the mount. It could also mean that we tried to mount
2599 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2600 * existing mount programs don't handle -EACCES very well so it should
2601 * be mapped to -EPERM instead.
2602 */
2603 if (status == -EACCES)
2604 status = -EPERM;
801a16dc
BS		 2605 return status;
2606}
2607
2ed4b95b
CL		 2608static int nfs4_do_find_root_sec(struct nfs_server *server,
2609 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2610{
2611 int mv = server->nfs_client->cl_minorversion;
2612 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2613}
2614
2615/**
2616 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2617 * @server: initialized nfs_server handle
2618 * @fhandle: we fill in the pseudo-fs root file handle
2619 * @info: we fill in an FSINFO struct
2620 *
2621 * Returns zero on success, or a negative errno.
801a16dc 2622 */
3028eb2b
BS		 2623int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2624 struct nfs_fsinfo *info)
801a16dc 2625{
2ed4b95b
CL		 2626 int status;
2627
2628 status = nfs4_lookup_root(server, fhandle, info);
2629 if ((status == -NFS4ERR_WRONGSEC) &&
2630 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2631 status = nfs4_do_find_root_sec(server, fhandle, info);
2632
1da177e4
LT		 2633 if (status == 0)
2634 status = nfs4_server_capabilities(server, fhandle);
2635 if (status == 0)
2636 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2637
c12e87f4 2638 return nfs4_map_errors(status);
1da177e4
LT		 2639}
2640
bae36241
BS		 2641static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2642 struct nfs_fsinfo *info)
2643{
2644 int error;
2645 struct nfs_fattr *fattr = info->fattr;
2646
2647 error = nfs4_server_capabilities(server, mntfh);
2648 if (error < 0) {
2649 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2650 return error;
2651 }
2652
2653 error = nfs4_proc_getattr(server, mntfh, fattr);
2654 if (error < 0) {
2655 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2656 return error;
2657 }
2658
2659 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2660 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2661 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2662
2663 return error;
2664}
2665
6b97fd3d
MN		 2666/*
2667 * Get locations and (maybe) other attributes of a referral.
2668 * Note that we'll actually follow the referral later when
2669 * we detect fsid mismatch in inode revalidation
2670 */
f05d147f
BS		 2671static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2672 const struct qstr *name, struct nfs_fattr *fattr,
2673 struct nfs_fh *fhandle)
6b97fd3d
MN		 2674{
2675 int status = -ENOMEM;
2676 struct page *page = NULL;
2677 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2678
2679 page = alloc_page(GFP_KERNEL);
2680 if (page == NULL)
2681 goto out;
2682 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2683 if (locations == NULL)
2684 goto out;
2685
f05d147f 2686 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2687 if (status != 0)
2688 goto out;
2689 /* Make sure server returned a different fsid for the referral */
2690 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2691 dprintk("%s: server did not return a different fsid for"
2692 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2693 status = -EIO;
2694 goto out;
2695 }
533eb461
AA		 2696 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2697 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2698
533eb461 2699 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2700 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2701 memset(fhandle, 0, sizeof(struct nfs_fh));
2702out:
2703 if (page)
2704 __free_page(page);
5d7ca35a 2705 kfree(locations);
6b97fd3d
MN		 2706 return status;
2707}
2708
1da177e4
LT		 2709static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2710{
2711 struct nfs4_getattr_arg args = {
2712 .fh = fhandle,
2713 .bitmask = server->attr_bitmask,
2714 };
2715 struct nfs4_getattr_res res = {
2716 .fattr = fattr,
2717 .server = server,
2718 };
2719 struct rpc_message msg = {
2720 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2721 .rpc_argp = &args,
2722 .rpc_resp = &res,
2723 };
2724
0e574af1 2725 nfs_fattr_init(fattr);
7c513058 2726 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2727}
2728
2729static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2730{
2731 struct nfs4_exception exception = { };
2732 int err;
2733 do {
2734 err = nfs4_handle_exception(server,
2735 _nfs4_proc_getattr(server, fhandle, fattr),
2736 &exception);
2737 } while (exception.retry);
2738 return err;
2739}
2740
2741/*
2742 * The file is not closed if it is opened due to the a request to change
2743 * the size of the file. The open call will not be needed once the
2744 * VFS layer lookup-intents are implemented.
2745 *
2746 * Close is called when the inode is destroyed.
2747 * If we haven't opened the file for O_WRONLY, we
2748 * need to in the size_change case to obtain a stateid.
2749 *
2750 * Got race?
2751 * Because OPEN is always done by name in nfsv4, it is
2752 * possible that we opened a different file by the same
2753 * name. We can recognize this race condition, but we
2754 * can't do anything about it besides returning an error.
2755 *
2756 * This will be fixed with VFS changes (lookup-intent).
2757 */
2758static int
2759nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2760 struct iattr *sattr)
2761{
08e9eac4 2762 struct inode *inode = dentry->d_inode;
659bfcd6 2763 struct rpc_cred *cred = NULL;
d530838b 2764 struct nfs4_state *state = NULL;
1da177e4
LT		 2765 int status;
2766
8a1636c4 2767 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2768 pnfs_commit_and_return_layout(inode);
8a1636c4 2769
0e574af1 2770 nfs_fattr_init(fattr);
1da177e4 2771
2669940d
AA		 2772 /* Deal with open(O_TRUNC) */
2773 if (sattr->ia_valid & ATTR_OPEN)
2774 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2775
2776 /* Optimization: if the end result is no change, don't RPC */
2777 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2778 return 0;
2779
d530838b 2780 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2781 if (sattr->ia_valid & ATTR_FILE) {
2782 struct nfs_open_context *ctx;
2783
2784 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2785 if (ctx) {
2786 cred = ctx->cred;
2787 state = ctx->state;
2788 }
659bfcd6 2789 }
08e9eac4 2790
659bfcd6 2791 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2792 if (status == 0)
2793 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2794 return status;
2795}
2796
0c2e53f1
TM		 2797static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2798 const struct qstr *name, struct nfs_fh *fhandle,
2799 struct nfs_fattr *fattr)
2b3de441 2800{
0c2e53f1 2801 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2802 int status;
2803 struct nfs4_lookup_arg args = {
2804 .bitmask = server->attr_bitmask,
0c2e53f1 2805 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2806 .name = name,
2807 };
2808 struct nfs4_lookup_res res = {
2809 .server = server,
2810 .fattr = fattr,
2811 .fh = fhandle,
2812 };
2813 struct rpc_message msg = {
2814 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2815 .rpc_argp = &args,
2816 .rpc_resp = &res,
2817 };
2818
2819 nfs_fattr_init(fattr);
2820
1da177e4 2821 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2822 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2823 dprintk("NFS reply lookup: %d\n", status);
2824 return status;
2825}
2826
72de53ec 2827static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2828{
7ebb9315 2829 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2830 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2831 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2832 fattr->nlink = 2;
2833}
2834
72de53ec
BS		 2835static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2836 struct qstr *name, struct nfs_fh *fhandle,
2837 struct nfs_fattr *fattr)
1da177e4
LT		 2838{
2839 struct nfs4_exception exception = { };
72de53ec 2840 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2841 int err;
2842 do {
72de53ec
BS		 2843 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2844 switch (err) {
08ef7bd3 2845 case -NFS4ERR_BADNAME:
72de53ec
BS		 2846 err = -ENOENT;
2847 goto out;
0c2e53f1 2848 case -NFS4ERR_MOVED:
f05d147f 2849 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2850 goto out;
0c2e53f1 2851 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2852 err = -EPERM;
2853 if (client != *clnt)
2854 goto out;
2855
2856 client = nfs4_create_sec_client(client, dir, name);
2857 if (IS_ERR(client))
2858 return PTR_ERR(client);
2859
2860 exception.retry = 1;
2861 break;
2862 default:
2863 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2864 }
1da177e4 2865 } while (exception.retry);
72de53ec
BS		 2866
2867out:
2868 if (err == 0)
2869 *clnt = client;
2870 else if (client != *clnt)
2871 rpc_shutdown_client(client);
2872
1da177e4
LT		 2873 return err;
2874}
2875
80a16b21 2876static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2877 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2878{
2879 int status;
2880 struct rpc_clnt *client = NFS_CLIENT(dir);
2881
2882 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2883 if (client != NFS_CLIENT(dir)) {
2884 rpc_shutdown_client(client);
2885 nfs_fixup_secinfo_attributes(fattr);
2886 }
2887 return status;
2888}
2889
f05d147f
BS		 2890struct rpc_clnt *
2891nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2892 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2893{
2894 int status;
2895 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2896
2897 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2898 if (status < 0) {
2899 rpc_shutdown_client(client);
2900 return ERR_PTR(status);
2901 }
2902 return client;
2903}
2904
1da177e4
LT		 2905static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2906{
76b32999 2907 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2908 struct nfs4_accessargs args = {
2909 .fh = NFS_FH(inode),
a4980e78 2910 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2911 };
2912 struct nfs4_accessres res = {
2913 .server = server,
1da177e4 2914 };
1da177e4
LT		 2915 struct rpc_message msg = {
2916 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2917 .rpc_argp = &args,
2918 .rpc_resp = &res,
2919 .rpc_cred = entry->cred,
2920 };
2921 int mode = entry->mask;
2922 int status;
2923
2924 /*
2925 * Determine which access bits we want to ask for...
2926 */
2927 if (mode & MAY_READ)
2928 args.access |= NFS4_ACCESS_READ;
2929 if (S_ISDIR(inode->i_mode)) {
2930 if (mode & MAY_WRITE)
2931 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2932 if (mode & MAY_EXEC)
2933 args.access |= NFS4_ACCESS_LOOKUP;
2934 } else {
2935 if (mode & MAY_WRITE)
2936 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2937 if (mode & MAY_EXEC)
2938 args.access |= NFS4_ACCESS_EXECUTE;
2939 }
c407d41a
TM		 2940
2941 res.fattr = nfs_alloc_fattr();
2942 if (res.fattr == NULL)
2943 return -ENOMEM;
2944
7c513058 2945 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2946 if (!status) {
6168f62c 2947 nfs_access_set_mask(entry, res.access);
c407d41a 2948 nfs_refresh_inode(inode, res.fattr);
1da177e4 2949 }
c407d41a 2950 nfs_free_fattr(res.fattr);
1da177e4
LT		 2951 return status;
2952}
2953
2954static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2955{
2956 struct nfs4_exception exception = { };
2957 int err;
2958 do {
2959 err = nfs4_handle_exception(NFS_SERVER(inode),
2960 _nfs4_proc_access(inode, entry),
2961 &exception);
2962 } while (exception.retry);
2963 return err;
2964}
2965
2966/*
2967 * TODO: For the time being, we don't try to get any attributes
2968 * along with any of the zero-copy operations READ, READDIR,
2969 * READLINK, WRITE.
2970 *
2971 * In the case of the first three, we want to put the GETATTR
2972 * after the read-type operation -- this is because it is hard
2973 * to predict the length of a GETATTR response in v4, and thus
2974 * align the READ data correctly. This means that the GETATTR
2975 * may end up partially falling into the page cache, and we should
2976 * shift it into the 'tail' of the xdr_buf before processing.
2977 * To do this efficiently, we need to know the total length
2978 * of data received, which doesn't seem to be available outside
2979 * of the RPC layer.
2980 *
2981 * In the case of WRITE, we also want to put the GETATTR after
2982 * the operation -- in this case because we want to make sure
140150db 2983 * we get the post-operation mtime and size.
1da177e4
LT		 2984 *
2985 * Both of these changes to the XDR layer would in fact be quite
2986 * minor, but I decided to leave them for a subsequent patch.
2987 */
2988static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2989 unsigned int pgbase, unsigned int pglen)
2990{
2991 struct nfs4_readlink args = {
2992 .fh = NFS_FH(inode),
2993 .pgbase = pgbase,
2994 .pglen = pglen,
2995 .pages = &page,
2996 };
f50c7000 2997 struct nfs4_readlink_res res;
1da177e4
LT		 2998 struct rpc_message msg = {
2999 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3000 .rpc_argp = &args,
f50c7000 3001 .rpc_resp = &res,
1da177e4
LT		 3002 };
3003
7c513058 3004 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3005}
3006
3007static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3008 unsigned int pgbase, unsigned int pglen)
3009{
3010 struct nfs4_exception exception = { };
3011 int err;
3012 do {
3013 err = nfs4_handle_exception(NFS_SERVER(inode),
3014 _nfs4_proc_readlink(inode, page, pgbase, pglen),
3015 &exception);
3016 } while (exception.retry);
3017 return err;
3018}
3019
1da177e4 3020/*
8867fe58 3021 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3022 */
1da177e4
LT		 3023static int
3024nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3025 int flags)
1da177e4 3026{
8867fe58 3027 struct nfs_open_context *ctx;
1da177e4 3028 struct nfs4_state *state;
1da177e4
LT		 3029 int status = 0;
3030
8867fe58
MS		 3031 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3032 if (IS_ERR(ctx))
3033 return PTR_ERR(ctx);
3034
a8a5da99 3035 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 3036 state = nfs4_do_open(dir, dentry, ctx->mode,
3037 flags, sattr, ctx->cred,
3038 &ctx->mdsthreshold);
d4d9cdcb 3039 d_drop(dentry);
1da177e4
LT		 3040 if (IS_ERR(state)) {
3041 status = PTR_ERR(state);
c0204fd2 3042 goto out;
1da177e4 3043 }
d4d9cdcb 3044 d_add(dentry, igrab(state->inode));
d75340cc 3045 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 3046 ctx->state = state;
1da177e4 3047out:
8867fe58 3048 put_nfs_open_context(ctx);
1da177e4
LT		 3049 return status;
3050}
3051
3052static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3053{
16e42959 3054 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3055 struct nfs_removeargs args = {
1da177e4 3056 .fh = NFS_FH(dir),
26fe5750 3057 .name = *name,
16e42959 3058 };
4fdc17b2 3059 struct nfs_removeres res = {
16e42959 3060 .server = server,
1da177e4 3061 };
1da177e4 3062 struct rpc_message msg = {
4fdc17b2
TM		 3063 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3064 .rpc_argp = &args,
3065 .rpc_resp = &res,
1da177e4 3066 };
778d2817 3067 int status;
1da177e4 3068
7c513058 3069 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3070 if (status == 0)
16e42959 3071 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3072 return status;
3073}
3074
3075static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3076{
3077 struct nfs4_exception exception = { };
3078 int err;
3079 do {
3080 err = nfs4_handle_exception(NFS_SERVER(dir),
3081 _nfs4_proc_remove(dir, name),
3082 &exception);
3083 } while (exception.retry);
3084 return err;
3085}
3086
e4eff1a6 3087static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3088{
e4eff1a6
TM		 3089 struct nfs_server *server = NFS_SERVER(dir);
3090 struct nfs_removeargs *args = msg->rpc_argp;
3091 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3092
e4eff1a6 3093 res->server = server;
1da177e4 3094 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3095 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 3096}
3097
34e137cc
BS		 3098static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3099{
d9afbd1b
TM		 3100 nfs4_setup_sequence(NFS_SERVER(data->dir),
3101 &data->args.seq_args,
3102 &data->res.seq_res,
3103 task);
1da177e4
LT		 3104}
3105
e4eff1a6 3106static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3107{
e4eff1a6
TM		 3108 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3109
14516c3a
TM		 3110 if (!nfs4_sequence_done(task, &res->seq_res))
3111 return 0;
9e33bed5 3112 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3113 return 0;
3114 update_changeattr(dir, &res->cinfo);
e4eff1a6 3115 return 1;
1da177e4
LT		 3116}
3117
d3d4152a
JL		 3118static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3119{
3120 struct nfs_server *server = NFS_SERVER(dir);
3121 struct nfs_renameargs *arg = msg->rpc_argp;
3122 struct nfs_renameres *res = msg->rpc_resp;
3123
3124 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3125 res->server = server;
9d12b216 3126 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3127}
3128
c6bfa1a1
BS		 3129static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3130{
d9afbd1b
TM		 3131 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3132 &data->args.seq_args,
3133 &data->res.seq_res,
3134 task);
d3d4152a
JL		 3135}
3136
3137static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3138 struct inode *new_dir)
3139{
3140 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3141
3142 if (!nfs4_sequence_done(task, &res->seq_res))
3143 return 0;
3144 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3145 return 0;
3146
3147 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3148 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3149 return 1;
3150}
3151
1da177e4
LT		 3152static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3153 struct inode *new_dir, struct qstr *new_name)
3154{
6caf2c82 3155 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3156 struct nfs_renameargs arg = {
1da177e4
LT		 3157 .old_dir = NFS_FH(old_dir),
3158 .new_dir = NFS_FH(new_dir),
3159 .old_name = old_name,
3160 .new_name = new_name,
6caf2c82 3161 };
e8582a8b 3162 struct nfs_renameres res = {
6caf2c82 3163 .server = server,
1da177e4 3164 };
1da177e4
LT		 3165 struct rpc_message msg = {
3166 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3167 .rpc_argp = &arg,
3168 .rpc_resp = &res,
3169 };
011fff72 3170 int status = -ENOMEM;
1da177e4 3171
7c513058 3172 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3173 if (!status) {
3174 update_changeattr(old_dir, &res.old_cinfo);
3175 update_changeattr(new_dir, &res.new_cinfo);
3176 }
3177 return status;
3178}
3179
3180static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3181 struct inode *new_dir, struct qstr *new_name)
3182{
3183 struct nfs4_exception exception = { };
3184 int err;
3185 do {
3186 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3187 _nfs4_proc_rename(old_dir, old_name,
3188 new_dir, new_name),
3189 &exception);
3190 } while (exception.retry);
3191 return err;
3192}
3193
3194static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3195{
91ba2eee 3196 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3197 struct nfs4_link_arg arg = {
3198 .fh = NFS_FH(inode),
3199 .dir_fh = NFS_FH(dir),
3200 .name = name,
91ba2eee
TM		 3201 .bitmask = server->attr_bitmask,
3202 };
91ba2eee
TM		 3203 struct nfs4_link_res res = {
3204 .server = server,
1da177e4 3205 };
1da177e4
LT		 3206 struct rpc_message msg = {
3207 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3208 .rpc_argp = &arg,
91ba2eee 3209 .rpc_resp = &res,
1da177e4 3210 };
136f2627
TM		 3211 int status = -ENOMEM;
3212
3213 res.fattr = nfs_alloc_fattr();
778d2817 3214 if (res.fattr == NULL)
136f2627 3215 goto out;
1da177e4 3216
7c513058 3217 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3218 if (!status) {
3219 update_changeattr(dir, &res.cinfo);
73a3d07c 3220 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3221 }
136f2627 3222out:
136f2627 3223 nfs_free_fattr(res.fattr);
1da177e4
LT		 3224 return status;
3225}
3226
3227static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3228{
3229 struct nfs4_exception exception = { };
3230 int err;
3231 do {
3232 err = nfs4_handle_exception(NFS_SERVER(inode),
3233 _nfs4_proc_link(inode, dir, name),
3234 &exception);
3235 } while (exception.retry);
3236 return err;
3237}
3238
57dc9a57
TM		 3239struct nfs4_createdata {
3240 struct rpc_message msg;
3241 struct nfs4_create_arg arg;
3242 struct nfs4_create_res res;
3243 struct nfs_fh fh;
3244 struct nfs_fattr fattr;
57dc9a57
TM		 3245};
3246
3247static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3248 struct qstr *name, struct iattr *sattr, u32 ftype)
3249{
3250 struct nfs4_createdata *data;
3251
3252 data = kzalloc(sizeof(*data), GFP_KERNEL);
3253 if (data != NULL) {
3254 struct nfs_server *server = NFS_SERVER(dir);
3255
3256 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3257 data->msg.rpc_argp = &data->arg;
3258 data->msg.rpc_resp = &data->res;
3259 data->arg.dir_fh = NFS_FH(dir);
3260 data->arg.server = server;
3261 data->arg.name = name;
3262 data->arg.attrs = sattr;
3263 data->arg.ftype = ftype;
3264 data->arg.bitmask = server->attr_bitmask;
3265 data->res.server = server;
3266 data->res.fh = &data->fh;
3267 data->res.fattr = &data->fattr;
57dc9a57 3268 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3269 }
3270 return data;
3271}
3272
3273static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3274{
7c513058 3275 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3276 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3277 if (status == 0) {
3278 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3279 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3280 }
3281 return status;
3282}
3283
3284static void nfs4_free_createdata(struct nfs4_createdata *data)
3285{
3286 kfree(data);
3287}
3288
4f390c15 3289static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3290 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3291{
57dc9a57
TM		 3292 struct nfs4_createdata *data;
3293 int status = -ENAMETOOLONG;
1da177e4 3294
94a6d753 3295 if (len > NFS4_MAXPATHLEN)
57dc9a57 3296 goto out;
4f390c15 3297
57dc9a57
TM		 3298 status = -ENOMEM;
3299 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3300 if (data == NULL)
3301 goto out;
3302
3303 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3304 data->arg.u.symlink.pages = &page;
3305 data->arg.u.symlink.len = len;
1da177e4 3306
57dc9a57
TM		 3307 status = nfs4_do_create(dir, dentry, data);
3308
3309 nfs4_free_createdata(data);
3310out:
1da177e4
LT		 3311 return status;
3312}
3313
4f390c15 3314static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3315 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3316{
3317 struct nfs4_exception exception = { };
3318 int err;
3319 do {
3320 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3321 _nfs4_proc_symlink(dir, dentry, page,
3322 len, sattr),
1da177e4
LT		 3323 &exception);
3324 } while (exception.retry);
3325 return err;
3326}
3327
3328static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3329 struct iattr *sattr)
3330{
57dc9a57
TM		 3331 struct nfs4_createdata *data;
3332 int status = -ENOMEM;
1da177e4 3333
57dc9a57
TM		 3334 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3335 if (data == NULL)
3336 goto out;
3337
3338 status = nfs4_do_create(dir, dentry, data);
3339
3340 nfs4_free_createdata(data);
3341out:
1da177e4
LT		 3342 return status;
3343}
3344
3345static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3346 struct iattr *sattr)
3347{
3348 struct nfs4_exception exception = { };
3349 int err;
a8a5da99
AK		 3350
3351 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3352 do {
3353 err = nfs4_handle_exception(NFS_SERVER(dir),
3354 _nfs4_proc_mkdir(dir, dentry, sattr),
3355 &exception);
3356 } while (exception.retry);
3357 return err;
3358}
3359
3360static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3361 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3362{
3363 struct inode *dir = dentry->d_inode;
3364 struct nfs4_readdir_arg args = {
3365 .fh = NFS_FH(dir),
56e4ebf8 3366 .pages = pages,
1da177e4
LT		 3367 .pgbase = 0,
3368 .count = count,
96d25e53 3369 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3370 .plus = plus,
1da177e4
LT		 3371 };
3372 struct nfs4_readdir_res res;
3373 struct rpc_message msg = {
3374 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3375 .rpc_argp = &args,
3376 .rpc_resp = &res,
3377 .rpc_cred = cred,
3378 };
3379 int status;
3380
3110ff80 3381 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3382 dentry->d_parent->d_name.name,
3383 dentry->d_name.name,
3384 (unsigned long long)cookie);
c3f52af3 3385 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3386 res.pgbase = args.pgbase;
7c513058 3387 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3388 if (status >= 0) {
c3f52af3 3389 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3390 status += args.pgbase;
3391 }
c4812998
TM		 3392
3393 nfs_invalidate_atime(dir);
3394
3110ff80 3395 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3396 return status;
3397}
3398
3399static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3400 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3401{
3402 struct nfs4_exception exception = { };
3403 int err;
3404 do {
3405 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3406 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3407 pages, count, plus),
1da177e4
LT		 3408 &exception);
3409 } while (exception.retry);
3410 return err;
3411}
3412
3413static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3414 struct iattr *sattr, dev_t rdev)
3415{
57dc9a57
TM		 3416 struct nfs4_createdata *data;
3417 int mode = sattr->ia_mode;
3418 int status = -ENOMEM;
1da177e4 3419
57dc9a57
TM		 3420 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3421 if (data == NULL)
3422 goto out;
3423
1da177e4 3424 if (S_ISFIFO(mode))
57dc9a57 3425 data->arg.ftype = NF4FIFO;
1da177e4 3426 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3427 data->arg.ftype = NF4BLK;
3428 data->arg.u.device.specdata1 = MAJOR(rdev);
3429 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3430 }
3431 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3432 data->arg.ftype = NF4CHR;
3433 data->arg.u.device.specdata1 = MAJOR(rdev);
3434 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3435 } else if (!S_ISSOCK(mode)) {
3436 status = -EINVAL;
3437 goto out_free;
1da177e4 3438 }
1da177e4 3439
57dc9a57 3440 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3441out_free:
57dc9a57
TM		 3442 nfs4_free_createdata(data);
3443out:
1da177e4
LT		 3444 return status;
3445}
3446
3447static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3448 struct iattr *sattr, dev_t rdev)
3449{
3450 struct nfs4_exception exception = { };
3451 int err;
a8a5da99
AK		 3452
3453 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3454 do {
3455 err = nfs4_handle_exception(NFS_SERVER(dir),
3456 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3457 &exception);
3458 } while (exception.retry);
3459 return err;
3460}
3461
3462static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3463 struct nfs_fsstat *fsstat)
3464{
3465 struct nfs4_statfs_arg args = {
3466 .fh = fhandle,
3467 .bitmask = server->attr_bitmask,
3468 };
24ad148a
BH		 3469 struct nfs4_statfs_res res = {
3470 .fsstat = fsstat,
3471 };
1da177e4
LT		 3472 struct rpc_message msg = {
3473 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3474 .rpc_argp = &args,
24ad148a 3475 .rpc_resp = &res,
1da177e4
LT		 3476 };
3477
0e574af1 3478 nfs_fattr_init(fsstat->fattr);
7c513058 3479 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3480}
3481
3482static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3483{
3484 struct nfs4_exception exception = { };
3485 int err;
3486 do {
3487 err = nfs4_handle_exception(server,
3488 _nfs4_proc_statfs(server, fhandle, fsstat),
3489 &exception);
3490 } while (exception.retry);
3491 return err;
3492}
3493
3494static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3495 struct nfs_fsinfo *fsinfo)
3496{
3497 struct nfs4_fsinfo_arg args = {
3498 .fh = fhandle,
3499 .bitmask = server->attr_bitmask,
3500 };
3dda5e43
BH		 3501 struct nfs4_fsinfo_res res = {
3502 .fsinfo = fsinfo,
3503 };
1da177e4
LT		 3504 struct rpc_message msg = {
3505 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3506 .rpc_argp = &args,
3dda5e43 3507 .rpc_resp = &res,
1da177e4
LT		 3508 };
3509
7c513058 3510 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3511}
3512
3513static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3514{
3515 struct nfs4_exception exception = { };
83ca7f5a 3516 unsigned long now = jiffies;
1da177e4
LT		 3517 int err;
3518
3519 do {
83ca7f5a
CL		 3520 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
3521 if (err == 0) {
3522 struct nfs_client *clp = server->nfs_client;
3523
3524 spin_lock(&clp->cl_lock);
3525 clp->cl_lease_time = fsinfo->lease_time * HZ;
3526 clp->cl_last_renewal = now;
3527 spin_unlock(&clp->cl_lock);
3528 break;
3529 }
3530 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3531 } while (exception.retry);
3532 return err;
3533}
3534
3535static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3536{
e38eb650
BS		 3537 int error;
3538
0e574af1 3539 nfs_fattr_init(fsinfo->fattr);
e38eb650 3540 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3541 if (error == 0) {
3542 /* block layout checks this! */
3543 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3544 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3545 }
e38eb650
BS		 3546
3547 return error;
1da177e4
LT		 3548}
3549
3550static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3551 struct nfs_pathconf *pathconf)
3552{
3553 struct nfs4_pathconf_arg args = {
3554 .fh = fhandle,
3555 .bitmask = server->attr_bitmask,
3556 };
d45b2989
BH		 3557 struct nfs4_pathconf_res res = {
3558 .pathconf = pathconf,
3559 };
1da177e4
LT		 3560 struct rpc_message msg = {
3561 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3562 .rpc_argp = &args,
d45b2989 3563 .rpc_resp = &res,
1da177e4
LT		 3564 };
3565
3566 /* None of the pathconf attributes are mandatory to implement */
3567 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3568 memset(pathconf, 0, sizeof(*pathconf));
3569 return 0;
3570 }
3571
0e574af1 3572 nfs_fattr_init(pathconf->fattr);
7c513058 3573 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3574}
3575
3576static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3577 struct nfs_pathconf *pathconf)
3578{
3579 struct nfs4_exception exception = { };
3580 int err;
3581
3582 do {
3583 err = nfs4_handle_exception(server,
3584 _nfs4_proc_pathconf(server, fhandle, pathconf),
3585 &exception);
3586 } while (exception.retry);
3587 return err;
3588}
3589
5521abfd 3590int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3591 const struct nfs_open_context *ctx,
3592 const struct nfs_lock_context *l_ctx,
3593 fmode_t fmode)
3594{
3595 const struct nfs_lockowner *lockowner = NULL;
3596
3597 if (l_ctx != NULL)
3598 lockowner = &l_ctx->lockowner;
5521abfd 3599 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3600}
3601EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3602
5521abfd
TM		 3603static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3604 const struct nfs_open_context *ctx,
3605 const struct nfs_lock_context *l_ctx,
3606 fmode_t fmode)
3607{
3608 nfs4_stateid current_stateid;
3609
c8dd8fdf
TM		 3610 /* If the current stateid represents a lost lock, then exit */
3611 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
3612 return true;
5521abfd
TM		 3613 return nfs4_stateid_match(stateid, &current_stateid);
3614}
3615
3616static bool nfs4_error_stateid_expired(int err)
3617{
3618 switch (err) {
3619 case -NFS4ERR_DELEG_REVOKED:
3620 case -NFS4ERR_ADMIN_REVOKED:
3621 case -NFS4ERR_BAD_STATEID:
3622 case -NFS4ERR_STALE_STATEID:
3623 case -NFS4ERR_OLD_STATEID:
3624 case -NFS4ERR_OPENMODE:
3625 case -NFS4ERR_EXPIRED:
3626 return true;
3627 }
3628 return false;
3629}
3630
d20581aa
BH		 3631void __nfs4_read_done_cb(struct nfs_read_data *data)
3632{
cd841605 3633 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3634}
3635
cbdabc7f 3636static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3637{
cd841605 3638 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3639
9e33bed5 3640 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3641 rpc_restart_call_prepare(task);
ec06c096 3642 return -EAGAIN;
1da177e4 3643 }
8850df99 3644
d20581aa 3645 __nfs4_read_done_cb(data);
1da177e4 3646 if (task->tk_status > 0)
ec06c096
TM		 3647 renew_lease(server, data->timestamp);
3648 return 0;
1da177e4
LT		 3649}
3650
5521abfd
TM		 3651static bool nfs4_read_stateid_changed(struct rpc_task *task,
3652 struct nfs_readargs *args)
3653{
3654
3655 if (!nfs4_error_stateid_expired(task->tk_status) ||
3656 nfs4_stateid_is_current(&args->stateid,
3657 args->context,
3658 args->lock_context,
3659 FMODE_READ))
3660 return false;
3661 rpc_restart_call_prepare(task);
3662 return true;
3663}
3664
cbdabc7f
AA		 3665static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3666{
3667
3668 dprintk("--> %s\n", __func__);
3669
3670 if (!nfs4_sequence_done(task, &data->res.seq_res))
3671 return -EAGAIN;
5521abfd
TM		 3672 if (nfs4_read_stateid_changed(task, &data->args))
3673 return -EAGAIN;
d20581aa
BH		 3674 return data->read_done_cb ? data->read_done_cb(task, data) :
3675 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3676}
3677
bdc7f021 3678static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3679{
1da177e4 3680 data->timestamp = jiffies;
cbdabc7f 3681 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3682 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3683 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3684}
3685
ea7c3303
BS		 3686static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3687{
9b206149 3688 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3689 &data->args.seq_args,
3690 &data->res.seq_res,
9b206149
TM		 3691 task))
3692 return;
3693 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3694 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3695}
3696
b029bc9b 3697static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3698{
cd841605 3699 struct inode *inode = data->header->inode;
1da177e4 3700
9e33bed5 3701 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3702 rpc_restart_call_prepare(task);
788e7a89 3703 return -EAGAIN;
1da177e4 3704 }
4f9838c7 3705 if (task->tk_status >= 0) {
1da177e4 3706 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3707 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3708 }
788e7a89 3709 return 0;
1da177e4
LT		 3710}
3711
5521abfd
TM		 3712static bool nfs4_write_stateid_changed(struct rpc_task *task,
3713 struct nfs_writeargs *args)
3714{
3715
3716 if (!nfs4_error_stateid_expired(task->tk_status) ||
3717 nfs4_stateid_is_current(&args->stateid,
3718 args->context,
3719 args->lock_context,
3720 FMODE_WRITE))
3721 return false;
3722 rpc_restart_call_prepare(task);
3723 return true;
3724}
3725
b029bc9b
FI		 3726static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3727{
3728 if (!nfs4_sequence_done(task, &data->res.seq_res))
3729 return -EAGAIN;
5521abfd
TM		 3730 if (nfs4_write_stateid_changed(task, &data->args))
3731 return -EAGAIN;
d20581aa
BH		 3732 return data->write_done_cb ? data->write_done_cb(task, data) :
3733 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3734}
3735
5a37f851
TM		 3736static
3737bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3738{
5a37f851
TM		 3739 const struct nfs_pgio_header *hdr = data->header;
3740
3741 /* Don't request attributes for pNFS or O_DIRECT writes */
3742 if (data->ds_clp != NULL || hdr->dreq != NULL)
3743 return false;
3744 /* Otherwise, request attributes if and only if we don't hold
3745 * a delegation
3746 */
011e2a7f 3747 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3748}
a69aef14 3749
bdc7f021 3750static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3751{
cd841605 3752 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3753
5a37f851 3754 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3755 data->args.bitmask = NULL;
3756 data->res.fattr = NULL;
3757 } else
3758 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3759
b029bc9b
FI		 3760 if (!data->write_done_cb)
3761 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3762 data->res.server = server;
1da177e4
LT		 3763 data->timestamp = jiffies;
3764
bdc7f021 3765 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3766 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3767}
3768
c6cb80d0
BS		 3769static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3770{
9b206149 3771 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3772 &data->args.seq_args,
3773 &data->res.seq_res,
9b206149
TM		 3774 task))
3775 return;
3776 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3777 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 3778}
3779
0b7c0153 3780static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3781{
d9afbd1b
TM		 3782 nfs4_setup_sequence(NFS_SERVER(data->inode),
3783 &data->args.seq_args,
3784 &data->res.seq_res,
3785 task);
1da177e4
LT		 3786}
3787
0b7c0153 3788static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3789{
1da177e4 3790 struct inode *inode = data->inode;
14516c3a 3791
9e33bed5 3792 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3793 rpc_restart_call_prepare(task);
788e7a89 3794 return -EAGAIN;
1da177e4 3795 }
788e7a89 3796 return 0;
1da177e4
LT		 3797}
3798
0b7c0153 3799static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3800{
3801 if (!nfs4_sequence_done(task, &data->res.seq_res))
3802 return -EAGAIN;
0b7c0153 3803 return data->commit_done_cb(task, data);
5f452431
FI		 3804}
3805
0b7c0153 3806static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3807{
788e7a89 3808 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3809
0b7c0153
FI		 3810 if (data->commit_done_cb == NULL)
3811 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3812 data->res.server = server;
bdc7f021 3813 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3814 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3815}
3816
9bc4e3ca
CL		 3817struct nfs4_renewdata {
3818 struct nfs_client *client;
3819 unsigned long timestamp;
3820};
3821
1da177e4
LT		 3822/*
3823 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3824 * standalone procedure for queueing an asynchronous RENEW.
3825 */
9bc4e3ca 3826static void nfs4_renew_release(void *calldata)
dc96aef9 3827{
9bc4e3ca
CL		 3828 struct nfs4_renewdata *data = calldata;
3829 struct nfs_client *clp = data->client;
dc96aef9 3830
0851de06
AB		 3831 if (atomic_read(&clp->cl_count) > 1)
3832 nfs4_schedule_state_renewal(clp);
3833 nfs_put_client(clp);
9bc4e3ca 3834 kfree(data);
dc96aef9
AB		 3835}
3836
9bc4e3ca 3837static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3838{
9bc4e3ca
CL		 3839 struct nfs4_renewdata *data = calldata;
3840 struct nfs_client *clp = data->client;
3841 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3842
3843 if (task->tk_status < 0) {
95baa25c 3844 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3845 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3846 return;
3847 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3848 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3849 return;
3850 }
3851 nfs4_schedule_path_down_recovery(clp);
1da177e4 3852 }
452e9352 3853 do_renew_lease(clp, timestamp);
1da177e4
LT		 3854}
3855
963d8fe5
TM		 3856static const struct rpc_call_ops nfs4_renew_ops = {
3857 .rpc_call_done = nfs4_renew_done,
dc96aef9 3858 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3859};
3860
2f60ea6b 3861static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3862{
3863 struct rpc_message msg = {
3864 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3865 .rpc_argp = clp,
b4454fe1 3866 .rpc_cred = cred,
1da177e4 3867 };
9bc4e3ca 3868 struct nfs4_renewdata *data;
1da177e4 3869
2f60ea6b
TM		 3870 if (renew_flags == 0)
3871 return 0;
0851de06
AB		 3872 if (!atomic_inc_not_zero(&clp->cl_count))
3873 return -EIO;
b569ad34 3874 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3875 if (data == NULL)
3876 return -ENOMEM;
3877 data->client = clp;
3878 data->timestamp = jiffies;
bc7a05ca 3879 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 3880 &nfs4_renew_ops, data);
1da177e4
LT		 3881}
3882
8534d4ec 3883static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3884{
3885 struct rpc_message msg = {
3886 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3887 .rpc_argp = clp,
b4454fe1 3888 .rpc_cred = cred,
1da177e4
LT		 3889 };
3890 unsigned long now = jiffies;
3891 int status;
3892
bc7a05ca 3893 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3894 if (status < 0)
3895 return status;
452e9352 3896 do_renew_lease(clp, now);
1da177e4
LT		 3897 return 0;
3898}
3899
aa1870af
BF		 3900static inline int nfs4_server_supports_acls(struct nfs_server *server)
3901{
3902 return (server->caps & NFS_CAP_ACLS)
3903 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3904 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3905}
3906
21f498c2
TM		 3907/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3908 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3909 * the stack.
3910 */
21f498c2 3911#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3912
e9e3d724
NH		 3913static int buf_to_pages_noslab(const void *buf, size_t buflen,
3914 struct page **pages, unsigned int *pgbase)
3915{
3916 struct page *newpage, **spages;
3917 int rc = 0;
3918 size_t len;
3919 spages = pages;
3920
3921 do {
21f498c2 3922 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3923 newpage = alloc_page(GFP_KERNEL);
3924
3925 if (newpage == NULL)
3926 goto unwind;
3927 memcpy(page_address(newpage), buf, len);
3928 buf += len;
3929 buflen -= len;
3930 *pages++ = newpage;
3931 rc++;
3932 } while (buflen != 0);
3933
3934 return rc;
3935
3936unwind:
3937 for(; rc > 0; rc--)
3938 __free_page(spages[rc-1]);
3939 return -ENOMEM;
3940}
3941
e50a1c2e
BF		 3942struct nfs4_cached_acl {
3943 int cached;
3944 size_t len;
3e9d4154 3945 char data[0];
e50a1c2e
BF		 3946};
3947
3948static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3949{
3950 struct nfs_inode *nfsi = NFS_I(inode);
3951
3952 spin_lock(&inode->i_lock);
3953 kfree(nfsi->nfs4_acl);
3954 nfsi->nfs4_acl = acl;
3955 spin_unlock(&inode->i_lock);
3956}
3957
3958static void nfs4_zap_acl_attr(struct inode *inode)
3959{
3960 nfs4_set_cached_acl(inode, NULL);
3961}
3962
3963static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3964{
3965 struct nfs_inode *nfsi = NFS_I(inode);
3966 struct nfs4_cached_acl *acl;
3967 int ret = -ENOENT;
3968
3969 spin_lock(&inode->i_lock);
3970 acl = nfsi->nfs4_acl;
3971 if (acl == NULL)
3972 goto out;
3973 if (buf == NULL) /* user is just asking for length */
3974 goto out_len;
3975 if (acl->cached == 0)
3976 goto out;
3977 ret = -ERANGE; /* see getxattr(2) man page */
3978 if (acl->len > buflen)
3979 goto out;
3980 memcpy(buf, acl->data, acl->len);
3981out_len:
3982 ret = acl->len;
3983out:
3984 spin_unlock(&inode->i_lock);
3985 return ret;
3986}
3987
5794d21e 3988static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3989{
3990 struct nfs4_cached_acl *acl;
b291f1b1 3991 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3992
1f1ea6c2 3993 if (buflen <= PAGE_SIZE) {
b291f1b1 3994 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3995 if (acl == NULL)
3996 goto out;
3997 acl->cached = 1;
5794d21e 3998 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3999 } else {
4000 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4001 if (acl == NULL)
4002 goto out;
4003 acl->cached = 0;
4004 }
4005 acl->len = acl_len;
4006out:
4007 nfs4_set_cached_acl(inode, acl);
4008}
4009
bf118a34
AA		 4010/*
4011 * The getxattr API returns the required buffer length when called with a
4012 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4013 * the required buf. On a NULL buf, we send a page of data to the server
4014 * guessing that the ACL request can be serviced by a page. If so, we cache
4015 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4016 * the cache. If not so, we throw away the page, and cache the required
4017 * length. The next getxattr call will then produce another round trip to
4018 * the server, this time with the input buf of the required size.
4019 */
16b4289c 4020static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4021{
bf118a34 4022 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4023 struct nfs_getaclargs args = {
4024 .fh = NFS_FH(inode),
4025 .acl_pages = pages,
4026 .acl_len = buflen,
4027 };
663c79b3
BH		 4028 struct nfs_getaclres res = {
4029 .acl_len = buflen,
4030 };
aa1870af
BF		 4031 struct rpc_message msg = {
4032 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4033 .rpc_argp = &args,
663c79b3 4034 .rpc_resp = &res,
aa1870af 4035 };
21f498c2
TM		 4036 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4037 int ret = -ENOMEM, i;
aa1870af 4038
bf118a34
AA		 4039 /* As long as we're doing a round trip to the server anyway,
4040 * let's be prepared for a page of acl data. */
4041 if (npages == 0)
4042 npages = 1;
21f498c2
TM		 4043 if (npages > ARRAY_SIZE(pages))
4044 return -ERANGE;
5a006899 4045
bf118a34
AA		 4046 for (i = 0; i < npages; i++) {
4047 pages[i] = alloc_page(GFP_KERNEL);
4048 if (!pages[i])
4049 goto out_free;
e50a1c2e 4050 }
5a006899
SP		 4051
4052 /* for decoding across pages */
4053 res.acl_scratch = alloc_page(GFP_KERNEL);
4054 if (!res.acl_scratch)
4055 goto out_free;
4056
bf118a34
AA		 4057 args.acl_len = npages * PAGE_SIZE;
4058 args.acl_pgbase = 0;
5a006899 4059
de040bec 4060 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4061 __func__, buf, buflen, npages, args.acl_len);
4062 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4063 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4064 if (ret)
4065 goto out_free;
bf118a34 4066
1f1ea6c2
TM		 4067 /* Handle the case where the passed-in buffer is too short */
4068 if (res.acl_flags & NFS4_ACL_TRUNC) {
4069 /* Did the user only issue a request for the acl length? */
4070 if (buf == NULL)
4071 goto out_ok;
e50a1c2e 4072 ret = -ERANGE;
1f1ea6c2 4073 goto out_free;
e50a1c2e 4074 }
1f1ea6c2 4075 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4076 if (buf) {
4077 if (res.acl_len > buflen) {
4078 ret = -ERANGE;
4079 goto out_free;
4080 }
1f1ea6c2 4081 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4082 }
1f1ea6c2
TM		 4083out_ok:
4084 ret = res.acl_len;
e50a1c2e 4085out_free:
bf118a34
AA		 4086 for (i = 0; i < npages; i++)
4087 if (pages[i])
4088 __free_page(pages[i]);
331818f1
TM		 4089 if (res.acl_scratch)
4090 __free_page(res.acl_scratch);
aa1870af
BF		 4091 return ret;
4092}
4093
16b4289c
TM		 4094static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4095{
4096 struct nfs4_exception exception = { };
4097 ssize_t ret;
4098 do {
4099 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4100 if (ret >= 0)
4101 break;
4102 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4103 } while (exception.retry);
4104 return ret;
4105}
4106
e50a1c2e
BF		 4107static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4108{
4109 struct nfs_server *server = NFS_SERVER(inode);
4110 int ret;
4111
4112 if (!nfs4_server_supports_acls(server))
4113 return -EOPNOTSUPP;
4114 ret = nfs_revalidate_inode(server, inode);
4115 if (ret < 0)
4116 return ret;
08a22b39
AK		 4117 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4118 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4119 ret = nfs4_read_cached_acl(inode, buf, buflen);
4120 if (ret != -ENOENT)
bf118a34
AA		 4121 /* -ENOENT is returned if there is no ACL or if there is an ACL
4122 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4123 return ret;
4124 return nfs4_get_acl_uncached(inode, buf, buflen);
4125}
4126
16b4289c 4127static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4128{
4129 struct nfs_server *server = NFS_SERVER(inode);
4130 struct page *pages[NFS4ACL_MAXPAGES];
4131 struct nfs_setaclargs arg = {
4132 .fh = NFS_FH(inode),
4133 .acl_pages = pages,
4134 .acl_len = buflen,
4135 };
73c403a9 4136 struct nfs_setaclres res;
4b580ee3
BF		 4137 struct rpc_message msg = {
4138 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4139 .rpc_argp = &arg,
73c403a9 4140 .rpc_resp = &res,
4b580ee3 4141 };
21f498c2 4142 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4143 int ret, i;
4b580ee3
BF		 4144
4145 if (!nfs4_server_supports_acls(server))
4146 return -EOPNOTSUPP;
21f498c2
TM		 4147 if (npages > ARRAY_SIZE(pages))
4148 return -ERANGE;
e9e3d724
NH		 4149 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4150 if (i < 0)
4151 return i;
57ec14c5 4152 nfs4_inode_return_delegation(inode);
7c513058 4153 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4154
4155 /*
4156 * Free each page after tx, so the only ref left is
4157 * held by the network stack
4158 */
4159 for (; i > 0; i--)
4160 put_page(pages[i-1]);
4161
08a22b39
AK		 4162 /*
4163 * Acl update can result in inode attribute update.
4164 * so mark the attribute cache invalid.
4165 */
4166 spin_lock(&inode->i_lock);
4167 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4168 spin_unlock(&inode->i_lock);
f41f7418
TM		 4169 nfs_access_zap_cache(inode);
4170 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4171 return ret;
4172}
4173
16b4289c
TM		 4174static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4175{
4176 struct nfs4_exception exception = { };
4177 int err;
4178 do {
4179 err = nfs4_handle_exception(NFS_SERVER(inode),
4180 __nfs4_proc_set_acl(inode, buf, buflen),
4181 &exception);
4182 } while (exception.retry);
4183 return err;
4184}
4185
1da177e4 4186static int
aa5190d0 4187nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4188{
aa5190d0
TM		 4189 struct nfs_client *clp = server->nfs_client;
4190
4191 if (task->tk_status >= 0)
1da177e4
LT		 4192 return 0;
4193 switch(task->tk_status) {
a1d0b5ee 4194 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4195 case -NFS4ERR_ADMIN_REVOKED:
4196 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4197 if (state == NULL)
4198 break;
4199 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4200 case -NFS4ERR_OPENMODE:
4201 if (state == NULL)
4202 break;
5d422301
TM		 4203 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4204 goto stateid_invalid;
0400a6b0 4205 goto wait_on_recovery;
0ced63d1 4206 case -NFS4ERR_EXPIRED:
5d422301
TM		 4207 if (state != NULL) {
4208 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4209 goto stateid_invalid;
4210 }
1da177e4 4211 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4212 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4213 nfs4_schedule_lease_recovery(clp);
4214 goto wait_on_recovery;
4745e315
AA		 4215#if defined(CONFIG_NFS_V4_1)
4216 case -NFS4ERR_BADSESSION:
4217 case -NFS4ERR_BADSLOT:
4218 case -NFS4ERR_BAD_HIGH_SLOT:
4219 case -NFS4ERR_DEADSESSION:
4220 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4221 case -NFS4ERR_SEQ_FALSE_RETRY:
4222 case -NFS4ERR_SEQ_MISORDERED:
4223 dprintk("%s ERROR %d, Reset session\n", __func__,
4224 task->tk_status);
9f594791 4225 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
39be1c3d 4226 goto wait_on_recovery;
4745e315 4227#endif /* CONFIG_NFS_V4_1 */
1da177e4 4228 case -NFS4ERR_DELAY:
aa5190d0 4229 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4230 case -NFS4ERR_GRACE:
1da177e4
LT		 4231 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4232 task->tk_status = 0;
4233 return -EAGAIN;
a8a4ae3a 4234 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4235 case -NFS4ERR_OLD_STATEID:
4236 task->tk_status = 0;
4237 return -EAGAIN;
4238 }
4239 task->tk_status = nfs4_map_errors(task->tk_status);
4240 return 0;
5d422301
TM		 4241stateid_invalid:
4242 task->tk_status = -EIO;
4243 return 0;
0400a6b0 4244wait_on_recovery:
a2c0b9e2 4245 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4246 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4247 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4248 task->tk_status = 0;
4249 return -EAGAIN;
1da177e4
LT		 4250}
4251
f092075d
CL		 4252static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4253 nfs4_verifier *bootverf)
cd93710e
CL		 4254{
4255 __be32 verf[2];
4256
2c820d9a
CL		 4257 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4258 /* An impossible timestamp guarantees this value
4259 * will never match a generated boot time. */
4260 verf[0] = 0;
4261 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4262 } else {
f092075d
CL		 4263 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4264 verf[0] = (__be32)nn->boot_time.tv_sec;
4265 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4266 }
cd93710e
CL		 4267 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4268}
4269
e984a55a
CL		 4270static unsigned int
4271nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4272 char *buf, size_t len)
4273{
4274 unsigned int result;
4275
4276 rcu_read_lock();
4277 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4278 clp->cl_ipaddr,
4279 rpc_peeraddr2str(clp->cl_rpcclient,
4280 RPC_DISPLAY_ADDR),
4281 rpc_peeraddr2str(clp->cl_rpcclient,
4282 RPC_DISPLAY_PROTO));
4283 rcu_read_unlock();
4284 return result;
4285}
4286
4287static unsigned int
4288nfs4_init_uniform_client_string(const struct nfs_client *clp,
4289 char *buf, size_t len)
4290{
6f2ea7f2
CL		 4291 char *nodename = clp->cl_rpcclient->cl_nodename;
4292
4293 if (nfs4_client_id_uniquifier[0] != '\0')
4294 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4295 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4296 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4297 nodename);
e984a55a
CL		 4298}
4299
6bbb4ae8
CL		 4300/**
4301 * nfs4_proc_setclientid - Negotiate client ID
4302 * @clp: state data structure
4303 * @program: RPC program for NFSv4 callback service
4304 * @port: IP port number for NFS4 callback service
4305 * @cred: RPC credential to use for this call
4306 * @res: where to place the result
4307 *
4308 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4309 */
bb8b27e5
TM		 4310int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4311 unsigned short port, struct rpc_cred *cred,
4312 struct nfs4_setclientid_res *res)
1da177e4
LT		 4313{
4314 nfs4_verifier sc_verifier;
4315 struct nfs4_setclientid setclientid = {
4316 .sc_verifier = &sc_verifier,
4317 .sc_prog = program,
f4eecd5d 4318 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4319 };
4320 struct rpc_message msg = {
4321 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4322 .rpc_argp = &setclientid,
bb8b27e5 4323 .rpc_resp = res,
286d7d6a 4324 .rpc_cred = cred,
1da177e4 4325 };
6bbb4ae8 4326 int status;
1da177e4 4327
de734831 4328 /* nfs_client_id4 */
f092075d 4329 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4330 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4331 setclientid.sc_name_len =
4332 nfs4_init_uniform_client_string(clp,
4333 setclientid.sc_name,
4334 sizeof(setclientid.sc_name));
4335 else
4336 setclientid.sc_name_len =
4337 nfs4_init_nonuniform_client_string(clp,
4338 setclientid.sc_name,
4339 sizeof(setclientid.sc_name));
de734831 4340 /* cb_client4 */
e984a55a 4341 rcu_read_lock();
de734831 4342 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4343 sizeof(setclientid.sc_netid),
4344 rpc_peeraddr2str(clp->cl_rpcclient,
4345 RPC_DISPLAY_NETID));
de734831
CL		 4346 rcu_read_unlock();
4347 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4348 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4349 clp->cl_ipaddr, port >> 8, port & 255);
4350
6bbb4ae8
CL		 4351 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4352 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4353 setclientid.sc_name_len, setclientid.sc_name);
4354 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4355 dprintk("NFS reply setclientid: %d\n", status);
4356 return status;
1da177e4
LT		 4357}
4358
6bbb4ae8
CL		 4359/**
4360 * nfs4_proc_setclientid_confirm - Confirm client ID
4361 * @clp: state data structure
4362 * @res: result of a previous SETCLIENTID
4363 * @cred: RPC credential to use for this call
4364 *
4365 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4366 */
fd954ae1 4367int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4368 struct nfs4_setclientid_res *arg,
4369 struct rpc_cred *cred)
1da177e4 4370{
1da177e4
LT		 4371 struct rpc_message msg = {
4372 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4373 .rpc_argp = arg,
286d7d6a 4374 .rpc_cred = cred,
1da177e4 4375 };
1da177e4
LT		 4376 int status;
4377
6bbb4ae8
CL		 4378 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4379 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4380 clp->cl_clientid);
1bd714f2 4381 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6bbb4ae8 4382 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4383 return status;
4384}
4385
fe650407
TM		 4386struct nfs4_delegreturndata {
4387 struct nfs4_delegreturnargs args;
fa178f29 4388 struct nfs4_delegreturnres res;
fe650407
TM		 4389 struct nfs_fh fh;
4390 nfs4_stateid stateid;
26e976a8 4391 unsigned long timestamp;
fa178f29 4392 struct nfs_fattr fattr;
fe650407
TM		 4393 int rpc_status;
4394};
4395
fe650407
TM		 4396static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4397{
4398 struct nfs4_delegreturndata *data = calldata;
938e1010 4399
14516c3a
TM		 4400 if (!nfs4_sequence_done(task, &data->res.seq_res))
4401 return;
938e1010 4402
79708861 4403 switch (task->tk_status) {
79708861 4404 case 0:
fa178f29 4405 renew_lease(data->res.server, data->timestamp);
79708861 4406 break;
0d08c381
TM		 4407 case -NFS4ERR_ADMIN_REVOKED:
4408 case -NFS4ERR_DELEG_REVOKED:
4409 case -NFS4ERR_BAD_STATEID:
4410 case -NFS4ERR_OLD_STATEID:
4411 case -NFS4ERR_STALE_STATEID:
4412 case -NFS4ERR_EXPIRED:
4413 task->tk_status = 0;
4414 break;
79708861
RL		 4415 default:
4416 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4417 -EAGAIN) {
d00c5d43 4418 rpc_restart_call_prepare(task);
79708861
RL		 4419 return;
4420 }
4421 }
4422 data->rpc_status = task->tk_status;
fe650407
TM		 4423}
4424
4425static void nfs4_delegreturn_release(void *calldata)
4426{
fe650407
TM		 4427 kfree(calldata);
4428}
4429
938e1010
AA		 4430#if defined(CONFIG_NFS_V4_1)
4431static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4432{
4433 struct nfs4_delegreturndata *d_data;
4434
4435 d_data = (struct nfs4_delegreturndata *)data;
4436
d9afbd1b
TM		 4437 nfs4_setup_sequence(d_data->res.server,
4438 &d_data->args.seq_args,
4439 &d_data->res.seq_res,
4440 task);
938e1010
AA		 4441}
4442#endif /* CONFIG_NFS_V4_1 */
4443
c8d149f3 4444static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4445#if defined(CONFIG_NFS_V4_1)
4446 .rpc_call_prepare = nfs4_delegreturn_prepare,
4447#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4448 .rpc_call_done = nfs4_delegreturn_done,
4449 .rpc_release = nfs4_delegreturn_release,
4450};
4451
e6f81075 4452static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4453{
4454 struct nfs4_delegreturndata *data;
fa178f29 4455 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4456 struct rpc_task *task;
5138fde0
TM		 4457 struct rpc_message msg = {
4458 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4459 .rpc_cred = cred,
4460 };
c970aa85
TM		 4461 struct rpc_task_setup task_setup_data = {
4462 .rpc_client = server->client,
5138fde0 4463 .rpc_message = &msg,
c970aa85
TM		 4464 .callback_ops = &nfs4_delegreturn_ops,
4465 .flags = RPC_TASK_ASYNC,
4466 };
e6f81075 4467 int status = 0;
fe650407 4468
8535b2be 4469 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4470 if (data == NULL)
4471 return -ENOMEM;
9d12b216 4472 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4473 data->args.fhandle = &data->fh;
4474 data->args.stateid = &data->stateid;
9e907fec 4475 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4476 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4477 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4478 data->res.fattr = &data->fattr;
4479 data->res.server = server;
5138fde0 4480 nfs_fattr_init(data->res.fattr);
26e976a8 4481 data->timestamp = jiffies;
fe650407
TM		 4482 data->rpc_status = 0;
4483
c970aa85 4484 task_setup_data.callback_data = data;
1174dd1f
TM		 4485 msg.rpc_argp = &data->args;
4486 msg.rpc_resp = &data->res;
c970aa85 4487 task = rpc_run_task(&task_setup_data);
7a1218a2 4488 if (IS_ERR(task))
fe650407 4489 return PTR_ERR(task);
e6f81075
TM		 4490 if (!issync)
4491 goto out;
fe650407 4492 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4493 if (status != 0)
4494 goto out;
4495 status = data->rpc_status;
e144cbcc
TM		 4496 if (status == 0)
4497 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4498 else
4499 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4500out:
e6b3c4db 4501 rpc_put_task(task);
fe650407 4502 return status;
1da177e4
LT		 4503}
4504
e6f81075 4505int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4506{
4507 struct nfs_server *server = NFS_SERVER(inode);
4508 struct nfs4_exception exception = { };
4509 int err;
4510 do {
e6f81075 4511 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4512 switch (err) {
4513 case -NFS4ERR_STALE_STATEID:
4514 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4515 case 0:
4516 return 0;
4517 }
4518 err = nfs4_handle_exception(server, err, &exception);
4519 } while (exception.retry);
4520 return err;
4521}
4522
4523#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4524#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4525
4526/*
4527 * sleep, with exponential backoff, and retry the LOCK operation.
4528 */
4529static unsigned long
4530nfs4_set_lock_task_retry(unsigned long timeout)
4531{
d310310c 4532 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4533 timeout <<= 1;
4534 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4535 return NFS4_LOCK_MAXTIMEOUT;
4536 return timeout;
4537}
4538
1da177e4
LT		 4539static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4540{
4541 struct inode *inode = state->inode;
4542 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4543 struct nfs_client *clp = server->nfs_client;
911d1aaf 4544 struct nfs_lockt_args arg = {
1da177e4 4545 .fh = NFS_FH(inode),
911d1aaf 4546 .fl = request,
1da177e4 4547 };
911d1aaf
TM		 4548 struct nfs_lockt_res res = {
4549 .denied = request,
1da177e4
LT		 4550 };
4551 struct rpc_message msg = {
4552 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4553 .rpc_argp = &arg,
4554 .rpc_resp = &res,
4555 .rpc_cred = state->owner->so_cred,
4556 };
1da177e4
LT		 4557 struct nfs4_lock_state *lsp;
4558 int status;
4559
911d1aaf 4560 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4561 status = nfs4_set_lock_state(state, request);
4562 if (status != 0)
4563 goto out;
4564 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4565 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4566 arg.lock_owner.s_dev = server->s_dev;
7c513058 4567 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4568 switch (status) {
4569 case 0:
4570 request->fl_type = F_UNLCK;
4571 break;
4572 case -NFS4ERR_DENIED:
4573 status = 0;
1da177e4 4574 }
70cc6487 4575 request->fl_ops->fl_release_private(request);
55fce163 4576 request->fl_ops = NULL;
8d0a8a9d 4577out:
1da177e4
LT		 4578 return status;
4579}
4580
4581static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4582{
4583 struct nfs4_exception exception = { };
4584 int err;
4585
4586 do {
4587 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4588 _nfs4_proc_getlk(state, cmd, request),
4589 &exception);
4590 } while (exception.retry);
4591 return err;
4592}
4593
4594static int do_vfs_lock(struct file *file, struct file_lock *fl)
4595{
4596 int res = 0;
4597 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4598 case FL_POSIX:
4599 res = posix_lock_file_wait(file, fl);
4600 break;
4601 case FL_FLOCK:
4602 res = flock_lock_file_wait(file, fl);
4603 break;
4604 default:
4605 BUG();
4606 }
1da177e4
LT		 4607 return res;
4608}
4609
faf5f49c 4610struct nfs4_unlockdata {
911d1aaf
TM		 4611 struct nfs_locku_args arg;
4612 struct nfs_locku_res res;
faf5f49c
TM		 4613 struct nfs4_lock_state *lsp;
4614 struct nfs_open_context *ctx;
911d1aaf
TM		 4615 struct file_lock fl;
4616 const struct nfs_server *server;
26e976a8 4617 unsigned long timestamp;
faf5f49c
TM		 4618};
4619
911d1aaf
TM		 4620static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4621 struct nfs_open_context *ctx,
4622 struct nfs4_lock_state *lsp,
4623 struct nfs_seqid *seqid)
4624{
4625 struct nfs4_unlockdata *p;
4626 struct inode *inode = lsp->ls_state->inode;
4627
8535b2be 4628 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4629 if (p == NULL)
4630 return NULL;
4631 p->arg.fh = NFS_FH(inode);
4632 p->arg.fl = &p->fl;
4633 p->arg.seqid = seqid;
c1d51931 4634 p->res.seqid = seqid;
911d1aaf
TM		 4635 p->arg.stateid = &lsp->ls_stateid;
4636 p->lsp = lsp;
4637 atomic_inc(&lsp->ls_count);
4638 /* Ensure we don't close file until we're done freeing locks! */
4639 p->ctx = get_nfs_open_context(ctx);
4640 memcpy(&p->fl, fl, sizeof(p->fl));
4641 p->server = NFS_SERVER(inode);
4642 return p;
4643}
4644
06f814a3 4645static void nfs4_locku_release_calldata(void *data)
faf5f49c 4646{
963d8fe5 4647 struct nfs4_unlockdata *calldata = data;
911d1aaf 4648 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4649 nfs4_put_lock_state(calldata->lsp);
4650 put_nfs_open_context(calldata->ctx);
4651 kfree(calldata);
faf5f49c
TM		 4652}
4653
963d8fe5 4654static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4655{
963d8fe5 4656 struct nfs4_unlockdata *calldata = data;
faf5f49c 4657
14516c3a
TM		 4658 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4659 return;
faf5f49c
TM		 4660 switch (task->tk_status) {
4661 case 0:
f597c537
TM		 4662 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4663 &calldata->res.stateid);
26e976a8 4664 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4665 break;
9e33bed5
TM		 4666 case -NFS4ERR_BAD_STATEID:
4667 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4668 case -NFS4ERR_STALE_STATEID:
4669 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4670 break;
4671 default:
9e33bed5 4672 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4673 rpc_restart_call_prepare(task);
faf5f49c 4674 }
2b1bc308 4675 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4676}
4677
4ce70ada 4678static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4679{
4ce70ada 4680 struct nfs4_unlockdata *calldata = data;
faf5f49c 4681
911d1aaf 4682 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 4683 goto out_wait;
795a88c9 4684 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 4685 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 4686 goto out_no_action;
faf5f49c 4687 }
26e976a8 4688 calldata->timestamp = jiffies;
035168ab 4689 if (nfs4_setup_sequence(calldata->server,
a893693c 4690 &calldata->arg.seq_args,
2240a9e2
TM		 4691 &calldata->res.seq_res,
4692 task) != 0)
4693 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 4694 return;
4695out_no_action:
4696 task->tk_action = NULL;
4697out_wait:
4698 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4699}
4700
963d8fe5 4701static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4702 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4703 .rpc_call_done = nfs4_locku_done,
06f814a3 4704 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4705};
4706
a5d16a4d
TM		 4707static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4708 struct nfs_open_context *ctx,
4709 struct nfs4_lock_state *lsp,
4710 struct nfs_seqid *seqid)
4711{
4712 struct nfs4_unlockdata *data;
5138fde0
TM		 4713 struct rpc_message msg = {
4714 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4715 .rpc_cred = ctx->cred,
4716 };
c970aa85
TM		 4717 struct rpc_task_setup task_setup_data = {
4718 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4719 .rpc_message = &msg,
c970aa85 4720 .callback_ops = &nfs4_locku_ops,
101070ca 4721 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4722 .flags = RPC_TASK_ASYNC,
4723 };
a5d16a4d 4724
137d6aca
FF		 4725 /* Ensure this is an unlock - when canceling a lock, the
4726 * canceled lock is passed in, and it won't be an unlock.
4727 */
4728 fl->fl_type = F_UNLCK;
4729
a5d16a4d
TM		 4730 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4731 if (data == NULL) {
4732 nfs_free_seqid(seqid);
4733 return ERR_PTR(-ENOMEM);
4734 }
4735
9d12b216 4736 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4737 msg.rpc_argp = &data->arg;
4738 msg.rpc_resp = &data->res;
c970aa85
TM		 4739 task_setup_data.callback_data = data;
4740 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4741}
4742
faf5f49c
TM		 4743static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4744{
65b62a29
TM		 4745 struct inode *inode = state->inode;
4746 struct nfs4_state_owner *sp = state->owner;
4747 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 4748 struct nfs_seqid *seqid;
1da177e4 4749 struct nfs4_lock_state *lsp;
06f814a3
TM		 4750 struct rpc_task *task;
4751 int status = 0;
536ff0f8 4752 unsigned char fl_flags = request->fl_flags;
faf5f49c 4753
8d0a8a9d 4754 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4755 /* Unlock _before_ we do the RPC call */
4756 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 4757 /* Exclude nfs_delegation_claim_locks() */
4758 mutex_lock(&sp->so_delegreturn_mutex);
4759 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 4760 down_read(&nfsi->rwsem);
4761 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4762 up_read(&nfsi->rwsem);
65b62a29 4763 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 4764 goto out;
19e03c57
TM		 4765 }
4766 up_read(&nfsi->rwsem);
65b62a29 4767 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 4768 if (status != 0)
9b073574
TM		 4769 goto out;
4770 /* Is this a delegated lock? */
8d0a8a9d 4771 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 4772 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
4773 goto out;
8535b2be 4774 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4775 status = -ENOMEM;
911d1aaf 4776 if (seqid == NULL)
9b073574 4777 goto out;
cd3758e3 4778 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4779 status = PTR_ERR(task);
4780 if (IS_ERR(task))
9b073574 4781 goto out;
a5d16a4d 4782 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4783 rpc_put_task(task);
9b073574 4784out:
536ff0f8 4785 request->fl_flags = fl_flags;
1da177e4
LT		 4786 return status;
4787}
4788
a5d16a4d
TM		 4789struct nfs4_lockdata {
4790 struct nfs_lock_args arg;
4791 struct nfs_lock_res res;
4792 struct nfs4_lock_state *lsp;
4793 struct nfs_open_context *ctx;
4794 struct file_lock fl;
26e976a8 4795 unsigned long timestamp;
a5d16a4d
TM		 4796 int rpc_status;
4797 int cancelled;
66179efe 4798 struct nfs_server *server;
a5d16a4d
TM		 4799};
4800
4801static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4802 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4803 gfp_t gfp_mask)
1da177e4 4804{
a5d16a4d
TM		 4805 struct nfs4_lockdata *p;
4806 struct inode *inode = lsp->ls_state->inode;
1da177e4 4807 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4808
8535b2be 4809 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4810 if (p == NULL)
4811 return NULL;
4812
4813 p->arg.fh = NFS_FH(inode);
4814 p->arg.fl = &p->fl;
8535b2be 4815 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4816 if (p->arg.open_seqid == NULL)
4817 goto out_free;
8535b2be 4818 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4819 if (p->arg.lock_seqid == NULL)
2f74c0a0 4820 goto out_free_seqid;
a5d16a4d 4821 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4822 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4823 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4824 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4825 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4826 p->lsp = lsp;
66179efe 4827 p->server = server;
a5d16a4d
TM		 4828 atomic_inc(&lsp->ls_count);
4829 p->ctx = get_nfs_open_context(ctx);
4830 memcpy(&p->fl, fl, sizeof(p->fl));
4831 return p;
2f74c0a0
TM		 4832out_free_seqid:
4833 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4834out_free:
4835 kfree(p);
4836 return NULL;
4837}
4838
4839static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4840{
4841 struct nfs4_lockdata *data = calldata;
4842 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4843
3110ff80 4844 dprintk("%s: begin!\n", __func__);
2f74c0a0 4845 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 4846 goto out_wait;
a5d16a4d
TM		 4847 /* Do we need to do an open_to_lock_owner? */
4848 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4849 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4850 goto out_release_lock_seqid;
8fe72bac 4851 }
8e472f33 4852 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 4853 data->arg.new_lock_owner = 1;
c1d51931 4854 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4855 } else
4856 data->arg.new_lock_owner = 0;
5d422301
TM		 4857 if (!nfs4_valid_open_stateid(state)) {
4858 data->rpc_status = -EBADF;
4859 task->tk_action = NULL;
4860 goto out_release_open_seqid;
4861 }
26e976a8 4862 data->timestamp = jiffies;
035168ab
TM		 4863 if (nfs4_setup_sequence(data->server,
4864 &data->arg.seq_args,
2240a9e2 4865 &data->res.seq_res,
d9afbd1b 4866 task) == 0)
66179efe 4867 return;
5d422301 4868out_release_open_seqid:
2240a9e2
TM		 4869 nfs_release_seqid(data->arg.open_seqid);
4870out_release_lock_seqid:
4871 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 4872out_wait:
4873 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 4874 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4875}
4876
a5d16a4d
TM		 4877static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4878{
4879 struct nfs4_lockdata *data = calldata;
4880
3110ff80 4881 dprintk("%s: begin!\n", __func__);
a5d16a4d 4882
14516c3a
TM		 4883 if (!nfs4_sequence_done(task, &data->res.seq_res))
4884 return;
66179efe 4885
a5d16a4d 4886 data->rpc_status = task->tk_status;
a5d16a4d 4887 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4888 if (data->rpc_status == 0)
4889 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4890 else
4891 goto out;
4892 }
4893 if (data->rpc_status == 0) {
f597c537 4894 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4895 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4896 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4897 }
a5d16a4d 4898out:
3110ff80 4899 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4900}
4901
4902static void nfs4_lock_release(void *calldata)
4903{
4904 struct nfs4_lockdata *data = calldata;
4905
3110ff80 4906 dprintk("%s: begin!\n", __func__);
2f74c0a0 4907 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4908 if (data->cancelled != 0) {
4909 struct rpc_task *task;
4910 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4911 data->arg.lock_seqid);
4912 if (!IS_ERR(task))
bf294b41 4913 rpc_put_task_async(task);
3110ff80 4914 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4915 } else
4916 nfs_free_seqid(data->arg.lock_seqid);
4917 nfs4_put_lock_state(data->lsp);
4918 put_nfs_open_context(data->ctx);
4919 kfree(data);
3110ff80 4920 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4921}
4922
4923static const struct rpc_call_ops nfs4_lock_ops = {
4924 .rpc_call_prepare = nfs4_lock_prepare,
4925 .rpc_call_done = nfs4_lock_done,
4926 .rpc_release = nfs4_lock_release,
4927};
4928
2bee72a6
TM		 4929static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4930{
2bee72a6
TM		 4931 switch (error) {
4932 case -NFS4ERR_ADMIN_REVOKED:
4933 case -NFS4ERR_BAD_STATEID:
ecac799a 4934 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4935 if (new_lock_owner != 0 ||
795a88c9 4936 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4937 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4938 break;
4939 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4940 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4941 case -NFS4ERR_EXPIRED:
4942 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4943 };
4944}
4945
afe6c27c 4946static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4947{
4948 struct nfs4_lockdata *data;
4949 struct rpc_task *task;
5138fde0
TM		 4950 struct rpc_message msg = {
4951 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4952 .rpc_cred = state->owner->so_cred,
4953 };
c970aa85
TM		 4954 struct rpc_task_setup task_setup_data = {
4955 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4956 .rpc_message = &msg,
c970aa85 4957 .callback_ops = &nfs4_lock_ops,
101070ca 4958 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4959 .flags = RPC_TASK_ASYNC,
4960 };
a5d16a4d
TM		 4961 int ret;
4962
3110ff80 4963 dprintk("%s: begin!\n", __func__);
cd3758e3 4964 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4965 fl->fl_u.nfs4_fl.owner,
4966 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4967 if (data == NULL)
4968 return -ENOMEM;
4969 if (IS_SETLKW(cmd))
4970 data->arg.block = 1;
9d12b216 4971 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4972 msg.rpc_argp = &data->arg;
4973 msg.rpc_resp = &data->res;
c970aa85 4974 task_setup_data.callback_data = data;
8fe72bac
TM		 4975 if (recovery_type > NFS_LOCK_NEW) {
4976 if (recovery_type == NFS_LOCK_RECLAIM)
4977 data->arg.reclaim = NFS_LOCK_RECLAIM;
4978 nfs4_set_sequence_privileged(&data->arg.seq_args);
4979 }
c970aa85 4980 task = rpc_run_task(&task_setup_data);
7a1218a2 4981 if (IS_ERR(task))
a5d16a4d 4982 return PTR_ERR(task);
a5d16a4d
TM		 4983 ret = nfs4_wait_for_completion_rpc_task(task);
4984 if (ret == 0) {
4985 ret = data->rpc_status;
2bee72a6
TM		 4986 if (ret)
4987 nfs4_handle_setlk_error(data->server, data->lsp,
4988 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4989 } else
4990 data->cancelled = 1;
e6b3c4db 4991 rpc_put_task(task);
3110ff80 4992 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4993 return ret;
1da177e4
LT		 4994}
4995
4996static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4997{
202b50dc 4998 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4999 struct nfs4_exception exception = {
5000 .inode = state->inode,
5001 };
202b50dc
TM		 5002 int err;
5003
5004 do {
42a2d13e
TM		 5005 /* Cache the lock if possible... */
5006 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5007 return 0;
afe6c27c 5008 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 5009 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5010 break;
5011 nfs4_handle_exception(server, err, &exception);
5012 } while (exception.retry);
5013 return err;
1da177e4
LT		 5014}
5015
5016static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5017{
202b50dc 5018 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5019 struct nfs4_exception exception = {
5020 .inode = state->inode,
5021 };
202b50dc
TM		 5022 int err;
5023
6bfc93ef
TM		 5024 err = nfs4_set_lock_state(state, request);
5025 if (err != 0)
5026 return err;
202b50dc 5027 do {
42a2d13e
TM		 5028 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5029 return 0;
afe6c27c 5030 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 5031 switch (err) {
5032 default:
5033 goto out;
5034 case -NFS4ERR_GRACE:
5035 case -NFS4ERR_DELAY:
5036 nfs4_handle_exception(server, err, &exception);
5037 err = 0;
5038 }
202b50dc 5039 } while (exception.retry);
a9ed2e25 5040out:
202b50dc 5041 return err;
1da177e4
LT		 5042}
5043
f062eb6c 5044#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5045/**
5046 * nfs41_check_expired_locks - possibly free a lock stateid
5047 *
5048 * @state: NFSv4 state for an inode
5049 *
5050 * Returns NFS_OK if recovery for this stateid is now finished.
5051 * Otherwise a negative NFS4ERR value is returned.
5052 */
b01dd1d8 5053static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5054{
eb64cf96 5055 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5056 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5057 struct nfs_server *server = NFS_SERVER(state->inode);
5058
b01dd1d8 5059 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5060 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 5061 status = nfs41_test_stateid(server, &lsp->ls_stateid);
5062 if (status != NFS_OK) {
3e60ffdd
CL		 5063 /* Free the stateid unless the server
5064 * informs us the stateid is unrecognized. */
89af2739
CL		 5065 if (status != -NFS4ERR_BAD_STATEID)
5066 nfs41_free_stateid(server,
5067 &lsp->ls_stateid);
795a88c9 5068 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5069 ret = status;
5070 }
5071 }
5072 };
5073
5074 return ret;
5075}
5076
5077static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5078{
5079 int status = NFS_OK;
5080
5081 if (test_bit(LK_STATE_IN_USE, &state->flags))
5082 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5083 if (status != NFS_OK)
5084 status = nfs4_lock_expired(state, request);
5085 return status;
f062eb6c
BS		 5086}
5087#endif
5088
1da177e4
LT		 5089static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5090{
9a99af49 5091 struct nfs4_state_owner *sp = state->owner;
19e03c57 5092 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5093 unsigned char fl_flags = request->fl_flags;
9a99af49 5094 unsigned int seq;
8e469ebd 5095 int status = -ENOLCK;
1da177e4 5096
8e469ebd
TM		 5097 if ((fl_flags & FL_POSIX) &&
5098 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5099 goto out;
6bfc93ef 5100 /* Is this a delegated open? */
6bfc93ef
TM		 5101 status = nfs4_set_lock_state(state, request);
5102 if (status != 0)
5103 goto out;
01c3b861
TM		 5104 request->fl_flags |= FL_ACCESS;
5105 status = do_vfs_lock(request->fl_file, request);
5106 if (status < 0)
5107 goto out;
19e03c57 5108 down_read(&nfsi->rwsem);
01c3b861 5109 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5110 /* Yes: cache locks! */
01c3b861 5111 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5112 request->fl_flags = fl_flags & ~FL_SLEEP;
5113 status = do_vfs_lock(request->fl_file, request);
5114 goto out_unlock;
01c3b861 5115 }
9a99af49
TM		 5116 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5117 up_read(&nfsi->rwsem);
afe6c27c 5118 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5119 if (status != 0)
9a99af49
TM		 5120 goto out;
5121 down_read(&nfsi->rwsem);
5122 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5123 status = -NFS4ERR_DELAY;
01c3b861 5124 goto out_unlock;
9a99af49 5125 }
6bfc93ef 5126 /* Note: we always want to sleep here! */
01c3b861 5127 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5128 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5129 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5130 "manager!\n", __func__);
01c3b861 5131out_unlock:
19e03c57 5132 up_read(&nfsi->rwsem);
01c3b861
TM		 5133out:
5134 request->fl_flags = fl_flags;
1da177e4
LT		 5135 return status;
5136}
5137
5138static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5139{
a1d0b5ee
TM		 5140 struct nfs4_exception exception = {
5141 .state = state,
05ffe24f 5142 .inode = state->inode,
a1d0b5ee 5143 };
1da177e4
LT		 5144 int err;
5145
5146 do {
965b5d67
TM		 5147 err = _nfs4_proc_setlk(state, cmd, request);
5148 if (err == -NFS4ERR_DENIED)
5149 err = -EAGAIN;
1da177e4 5150 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5151 err, &exception);
1da177e4
LT		 5152 } while (exception.retry);
5153 return err;
5154}
5155
5156static int
5157nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5158{
5159 struct nfs_open_context *ctx;
5160 struct nfs4_state *state;
5161 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5162 int status;
5163
5164 /* verify open state */
cd3758e3 5165 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5166 state = ctx->state;
5167
5168 if (request->fl_start < 0 || request->fl_end < 0)
5169 return -EINVAL;
5170
d953126a
TM		 5171 if (IS_GETLK(cmd)) {
5172 if (state != NULL)
5173 return nfs4_proc_getlk(state, F_GETLK, request);
5174 return 0;
5175 }
1da177e4
LT		 5176
5177 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5178 return -EINVAL;
5179
d953126a
TM		 5180 if (request->fl_type == F_UNLCK) {
5181 if (state != NULL)
5182 return nfs4_proc_unlck(state, cmd, request);
5183 return 0;
5184 }
1da177e4 5185
d953126a
TM		 5186 if (state == NULL)
5187 return -ENOLCK;
55725513
TM		 5188 /*
5189 * Don't rely on the VFS having checked the file open mode,
5190 * since it won't do this for flock() locks.
5191 */
f44106e2 5192 switch (request->fl_type) {
55725513
TM		 5193 case F_RDLCK:
5194 if (!(filp->f_mode & FMODE_READ))
5195 return -EBADF;
5196 break;
5197 case F_WRLCK:
5198 if (!(filp->f_mode & FMODE_WRITE))
5199 return -EBADF;
5200 }
5201
1da177e4
LT		 5202 do {
5203 status = nfs4_proc_setlk(state, cmd, request);
5204 if ((status != -EAGAIN) || IS_SETLK(cmd))
5205 break;
5206 timeout = nfs4_set_lock_task_retry(timeout);
5207 status = -ERESTARTSYS;
5208 if (signalled())
5209 break;
5210 } while(status < 0);
1da177e4
LT		 5211 return status;
5212}
5213
db4f2e63 5214int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5215{
5216 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5217 int err;
5218
5219 err = nfs4_set_lock_state(state, fl);
5220 if (err != 0)
db4f2e63 5221 return err;
4a706fa0 5222 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5223 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5224}
6b3b5496 5225
cf470c3e
TM		 5226struct nfs_release_lockowner_data {
5227 struct nfs4_lock_state *lsp;
5ae67c4f 5228 struct nfs_server *server;
cf470c3e
TM		 5229 struct nfs_release_lockowner_args args;
5230};
5231
d3c7b7cc
TM		 5232static void nfs4_release_lockowner_release(void *calldata)
5233{
cf470c3e 5234 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5235 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5236 kfree(calldata);
5237}
5238
17280175 5239static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5240 .rpc_release = nfs4_release_lockowner_release,
5241};
5242
c8b2d0bf 5243static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5244{
cf470c3e 5245 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5246 struct rpc_message msg = {
5247 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5248 };
5249
5250 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5251 return -EINVAL;
5252 data = kmalloc(sizeof(*data), GFP_NOFS);
5253 if (!data)
5254 return -ENOMEM;
5255 data->lsp = lsp;
5ae67c4f 5256 data->server = server;
cf470c3e
TM		 5257 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5258 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5259 data->args.lock_owner.s_dev = server->s_dev;
5260 msg.rpc_argp = &data->args;
5261 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5262 return 0;
d3c7b7cc
TM		 5263}
5264
aa1870af
BF		 5265#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5266
64c2ce8b
AK		 5267static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5268 const void *buf, size_t buflen,
5269 int flags, int type)
6b3b5496 5270{
64c2ce8b
AK		 5271 if (strcmp(key, "") != 0)
5272 return -EINVAL;
4b580ee3 5273
64c2ce8b 5274 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5275}
5276
64c2ce8b
AK		 5277static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5278 void *buf, size_t buflen, int type)
6b3b5496 5279{
64c2ce8b
AK		 5280 if (strcmp(key, "") != 0)
5281 return -EINVAL;
aa1870af 5282
64c2ce8b 5283 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5284}
5285
64c2ce8b
AK		 5286static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5287 size_t list_len, const char *name,
5288 size_t name_len, int type)
6b3b5496 5289{
64c2ce8b 5290 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5291
096455a2
BF		 5292 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5293 return 0;
64c2ce8b
AK		 5294
5295 if (list && len <= list_len)
5296 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5297 return len;
6b3b5496
BF		 5298}
5299
533eb461
AA		 5300/*
5301 * nfs_fhget will use either the mounted_on_fileid or the fileid
5302 */
69aaaae1
TM		 5303static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5304{
533eb461
AA		 5305 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5306 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5307 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5308 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5309 return;
5310
5311 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5312 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5313 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5314 fattr->nlink = 2;
5315}
5316
f05d147f
BS		 5317static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5318 const struct qstr *name,
5319 struct nfs4_fs_locations *fs_locations,
5320 struct page *page)
683b57b4
TM		 5321{
5322 struct nfs_server *server = NFS_SERVER(dir);
5323 u32 bitmask[2] = {
361e624f 5324 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5325 };
5326 struct nfs4_fs_locations_arg args = {
5327 .dir_fh = NFS_FH(dir),
c228fd3a 5328 .name = name,
683b57b4
TM		 5329 .page = page,
5330 .bitmask = bitmask,
5331 };
22958463
BH		 5332 struct nfs4_fs_locations_res res = {
5333 .fs_locations = fs_locations,
5334 };
683b57b4
TM		 5335 struct rpc_message msg = {
5336 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5337 .rpc_argp = &args,
22958463 5338 .rpc_resp = &res,
683b57b4
TM		 5339 };
5340 int status;
5341
3110ff80 5342 dprintk("%s: start\n", __func__);
533eb461
AA		 5343
5344 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5345 * is not supported */
5346 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5347 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5348 else
5349 bitmask[0] |= FATTR4_WORD0_FILEID;
5350
c228fd3a 5351 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5352 fs_locations->server = server;
830b8e33 5353 fs_locations->nlocations = 0;
f05d147f 5354 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5355 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5356 return status;
5357}
5358
f05d147f
BS		 5359int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5360 const struct qstr *name,
5361 struct nfs4_fs_locations *fs_locations,
5362 struct page *page)
db0a9593
BS		 5363{
5364 struct nfs4_exception exception = { };
5365 int err;
5366 do {
5367 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5368 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5369 &exception);
5370 } while (exception.retry);
5371 return err;
5372}
5373
5a5ea0d4
BS		 5374static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5375{
5376 int status;
5377 struct nfs4_secinfo_arg args = {
5378 .dir_fh = NFS_FH(dir),
5379 .name = name,
5380 };
5381 struct nfs4_secinfo_res res = {
5382 .flavors = flavors,
5383 };
5384 struct rpc_message msg = {
5385 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5386 .rpc_argp = &args,
5387 .rpc_resp = &res,
5388 };
5389
5390 dprintk("NFS call secinfo %s\n", name->name);
5391 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5392 dprintk("NFS reply secinfo: %d\n", status);
5393 return status;
5394}
5395
72de53ec
BS		 5396int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5397 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5398{
5399 struct nfs4_exception exception = { };
5400 int err;
5401 do {
5402 err = nfs4_handle_exception(NFS_SERVER(dir),
5403 _nfs4_proc_secinfo(dir, name, flavors),
5404 &exception);
5405 } while (exception.retry);
5406 return err;
5407}
5408
557134a3 5409#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5410/*
5411 * Check the exchange flags returned by the server for invalid flags, having
5412 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5413 * DS flags set.
5414 */
5415static int nfs4_check_cl_exchange_flags(u32 flags)
5416{
5417 if (flags & ~EXCHGID4_FLAG_MASK_R)
5418 goto out_inval;
5419 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5420 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5421 goto out_inval;
5422 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5423 goto out_inval;
5424 return NFS_OK;
5425out_inval:
5426 return -NFS4ERR_INVAL;
5427}
5428
78fe0f41 5429static bool
79d4e1f0
CL		 5430nfs41_same_server_scope(struct nfs41_server_scope *a,
5431 struct nfs41_server_scope *b)
78fe0f41
WAA		 5432{
5433 if (a->server_scope_sz == b->server_scope_sz &&
5434 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5435 return true;
5436
5437 return false;
5438}
5439
7c44f1ae
WAA		 5440/*
5441 * nfs4_proc_bind_conn_to_session()
5442 *
5443 * The 4.1 client currently uses the same TCP connection for the
5444 * fore and backchannel.
5445 */
2cf047c9 5446int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5447{
5448 int status;
5449 struct nfs41_bind_conn_to_session_res res;
5450 struct rpc_message msg = {
5451 .rpc_proc =
5452 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5453 .rpc_argp = clp,
5454 .rpc_resp = &res,
2cf047c9 5455 .rpc_cred = cred,
7c44f1ae
WAA		 5456 };
5457
5458 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5459
5460 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5461 if (unlikely(res.session == NULL)) {
5462 status = -ENOMEM;
5463 goto out;
5464 }
5465
5466 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5467 if (status == 0) {
5468 if (memcmp(res.session->sess_id.data,
5469 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5470 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5471 status = -EIO;
5472 goto out_session;
5473 }
5474 if (res.dir != NFS4_CDFS4_BOTH) {
5475 dprintk("NFS: %s: Unexpected direction from server\n",
5476 __func__);
5477 status = -EIO;
5478 goto out_session;
5479 }
5480 if (res.use_conn_in_rdma_mode) {
5481 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5482 __func__);
5483 status = -EIO;
5484 goto out_session;
5485 }
5486 }
5487out_session:
5488 kfree(res.session);
5489out:
5490 dprintk("<-- %s status= %d\n", __func__, status);
5491 return status;
5492}
5493
99fe60d0
BH		 5494/*
5495 * nfs4_proc_exchange_id()
5496 *
6bbb4ae8
CL		 5497 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5498 *
99fe60d0
BH		 5499 * Since the clientid has expired, all compounds using sessions
5500 * associated with the stale clientid will be returning
5501 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5502 * be in some phase of session reset.
5503 */
4d643d1d 5504int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5505{
5506 nfs4_verifier verifier;
5507 struct nfs41_exchange_id_args args = {
cd93710e 5508 .verifier = &verifier,
99fe60d0 5509 .client = clp,
357f54d6 5510 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5511 };
5512 struct nfs41_exchange_id_res res = {
32b01310 5513 0
99fe60d0
BH		 5514 };
5515 int status;
5516 struct rpc_message msg = {
5517 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5518 .rpc_argp = &args,
5519 .rpc_resp = &res,
5520 .rpc_cred = cred,
5521 };
99fe60d0 5522
f092075d 5523 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5524 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5525 sizeof(args.id));
6bbb4ae8
CL		 5526 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5527 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5528 args.id_len, args.id);
99fe60d0 5529
acdeb69d 5530 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5531 GFP_NOFS);
acdeb69d 5532 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5533 status = -ENOMEM;
5534 goto out;
5535 }
78fe0f41 5536
79d4e1f0 5537 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5538 GFP_NOFS);
177313f1 5539 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5540 status = -ENOMEM;
acdeb69d 5541 goto out_server_owner;
abe9a6d5 5542 }
78fe0f41 5543
bbafffd2 5544 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5545 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5546 status = -ENOMEM;
5547 goto out_server_scope;
5548 }
5549
1bd714f2 5550 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5551 if (status == 0)
32b01310 5552 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5553
acdeb69d 5554 if (status == 0) {
32b01310
TM		 5555 clp->cl_clientid = res.clientid;
5556 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5557 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5558 clp->cl_seqid = res.seqid;
5559
acdeb69d
CL		 5560 kfree(clp->cl_serverowner);
5561 clp->cl_serverowner = res.server_owner;
5562 res.server_owner = NULL;
78fe0f41 5563
7d2ed9ac 5564 /* use the most recent implementation id */
59155546
CL		 5565 kfree(clp->cl_implid);
5566 clp->cl_implid = res.impl_id;
7d2ed9ac 5567
177313f1 5568 if (clp->cl_serverscope != NULL &&
79d4e1f0 5569 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5570 res.server_scope)) {
5571 dprintk("%s: server_scope mismatch detected\n",
5572 __func__);
5573 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5574 kfree(clp->cl_serverscope);
5575 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5576 }
5577
177313f1 5578 if (clp->cl_serverscope == NULL) {
79d4e1f0 5579 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5580 goto out;
5581 }
32b01310
TM		 5582 } else
5583 kfree(res.impl_id);
7d2ed9ac 5584
acdeb69d
CL		 5585out_server_owner:
5586 kfree(res.server_owner);
7d2ed9ac 5587out_server_scope:
abe9a6d5
WAA		 5588 kfree(res.server_scope);
5589out:
177313f1 5590 if (clp->cl_implid != NULL)
6bbb4ae8 5591 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5592 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5593 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5594 clp->cl_implid->date.seconds,
5595 clp->cl_implid->date.nseconds);
6bbb4ae8 5596 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5597 return status;
5598}
5599
66245539
TM		 5600static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5601 struct rpc_cred *cred)
5602{
5603 struct rpc_message msg = {
5604 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5605 .rpc_argp = clp,
5606 .rpc_cred = cred,
5607 };
5608 int status;
5609
5610 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5611 if (status)
02c67525 5612 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5613 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5614 return status;
5615}
5616
5617static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5618 struct rpc_cred *cred)
5619{
5620 unsigned int loop;
5621 int ret;
5622
5623 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5624 ret = _nfs4_proc_destroy_clientid(clp, cred);
5625 switch (ret) {
5626 case -NFS4ERR_DELAY:
5627 case -NFS4ERR_CLIENTID_BUSY:
5628 ssleep(1);
5629 break;
5630 default:
5631 return ret;
5632 }
5633 }
5634 return 0;
5635}
5636
5637int nfs4_destroy_clientid(struct nfs_client *clp)
5638{
5639 struct rpc_cred *cred;
5640 int ret = 0;
5641
5642 if (clp->cl_mvops->minor_version < 1)
5643 goto out;
5644 if (clp->cl_exchange_flags == 0)
5645 goto out;
05f4c350
CL		 5646 if (clp->cl_preserve_clid)
5647 goto out;
66245539
TM		 5648 cred = nfs4_get_exchange_id_cred(clp);
5649 ret = nfs4_proc_destroy_clientid(clp, cred);
5650 if (cred)
5651 put_rpccred(cred);
5652 switch (ret) {
5653 case 0:
5654 case -NFS4ERR_STALE_CLIENTID:
5655 clp->cl_exchange_flags = 0;
5656 }
5657out:
5658 return ret;
5659}
5660
2050f0cc
AA		 5661struct nfs4_get_lease_time_data {
5662 struct nfs4_get_lease_time_args *args;
5663 struct nfs4_get_lease_time_res *res;
5664 struct nfs_client *clp;
5665};
5666
5667static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5668 void *calldata)
5669{
2050f0cc
AA		 5670 struct nfs4_get_lease_time_data *data =
5671 (struct nfs4_get_lease_time_data *)calldata;
5672
5673 dprintk("--> %s\n", __func__);
5674 /* just setup sequence, do not trigger session recovery
5675 since we're invoked within one */
d9afbd1b
TM		 5676 nfs41_setup_sequence(data->clp->cl_session,
5677 &data->args->la_seq_args,
5678 &data->res->lr_seq_res,
5679 task);
2050f0cc
AA		 5680 dprintk("<-- %s\n", __func__);
5681}
5682
5683/*
5684 * Called from nfs4_state_manager thread for session setup, so don't recover
5685 * from sequence operation or clientid errors.
5686 */
5687static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5688{
5689 struct nfs4_get_lease_time_data *data =
5690 (struct nfs4_get_lease_time_data *)calldata;
5691
5692 dprintk("--> %s\n", __func__);
14516c3a
TM		 5693 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5694 return;
2050f0cc
AA		 5695 switch (task->tk_status) {
5696 case -NFS4ERR_DELAY:
5697 case -NFS4ERR_GRACE:
5698 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5699 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5700 task->tk_status = 0;
a8a4ae3a
AA		 5701 /* fall through */
5702 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5703 rpc_restart_call_prepare(task);
2050f0cc
AA		 5704 return;
5705 }
2050f0cc
AA		 5706 dprintk("<-- %s\n", __func__);
5707}
5708
17280175 5709static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5710 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5711 .rpc_call_done = nfs4_get_lease_time_done,
5712};
5713
5714int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5715{
5716 struct rpc_task *task;
5717 struct nfs4_get_lease_time_args args;
5718 struct nfs4_get_lease_time_res res = {
5719 .lr_fsinfo = fsinfo,
5720 };
5721 struct nfs4_get_lease_time_data data = {
5722 .args = &args,
5723 .res = &res,
5724 .clp = clp,
5725 };
5726 struct rpc_message msg = {
5727 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5728 .rpc_argp = &args,
5729 .rpc_resp = &res,
5730 };
5731 struct rpc_task_setup task_setup = {
5732 .rpc_client = clp->cl_rpcclient,
5733 .rpc_message = &msg,
5734 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5735 .callback_data = &data,
5736 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5737 };
5738 int status;
5739
9d12b216 5740 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5741 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5742 dprintk("--> %s\n", __func__);
5743 task = rpc_run_task(&task_setup);
5744
5745 if (IS_ERR(task))
5746 status = PTR_ERR(task);
5747 else {
5748 status = task->tk_status;
5749 rpc_put_task(task);
5750 }
5751 dprintk("<-- %s return %d\n", __func__, status);
5752
5753 return status;
5754}
5755
fc931582
AA		 5756/*
5757 * Initialize the values to be used by the client in CREATE_SESSION
5758 * If nfs4_init_session set the fore channel request and response sizes,
5759 * use them.
5760 *
5761 * Set the back channel max_resp_sz_cached to zero to force the client to
5762 * always set csa_cachethis to FALSE because the current implementation
5763 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5764 */
5765static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5766{
5767 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5768 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5769 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5770
5771 if (mxrqst_sz == 0)
5772 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5773 if (mxresp_sz == 0)
5774 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5775 /* Fore channel attributes */
fc931582
AA		 5776 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5777 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5778 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5779 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5780
5781 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5782 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5783 __func__,
5784 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5785 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5786
5787 /* Back channel attributes */
fc931582
AA		 5788 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5789 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5790 args->bc_attrs.max_resp_sz_cached = 0;
5791 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5792 args->bc_attrs.max_reqs = 1;
5793
5794 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5795 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5796 __func__,
5797 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5798 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5799 args->bc_attrs.max_reqs);
5800}
5801
43c2e885 5802static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5803{
43c2e885
BF		 5804 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5805 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5806
43c2e885
BF		 5807 if (rcvd->max_resp_sz > sent->max_resp_sz)
5808 return -EINVAL;
5809 /*
5810 * Our requested max_ops is the minimum we need; we're not
5811 * prepared to break up compounds into smaller pieces than that.
5812 * So, no point even trying to continue if the server won't
5813 * cooperate:
5814 */
5815 if (rcvd->max_ops < sent->max_ops)
5816 return -EINVAL;
5817 if (rcvd->max_reqs == 0)
5818 return -EINVAL;
b4b9a0c1
VG		 5819 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5820 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5821 return 0;
8d35301d
AA		 5822}
5823
43c2e885
BF		 5824static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5825{
5826 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5827 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5828
43c2e885
BF		 5829 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5830 return -EINVAL;
5831 if (rcvd->max_resp_sz < sent->max_resp_sz)
5832 return -EINVAL;
5833 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5834 return -EINVAL;
5835 /* These would render the backchannel useless: */
b4b9a0c1 5836 if (rcvd->max_ops != sent->max_ops)
43c2e885 5837 return -EINVAL;
b4b9a0c1 5838 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5839 return -EINVAL;
5840 return 0;
5841}
8d35301d 5842
8d35301d
AA		 5843static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5844 struct nfs4_session *session)
5845{
43c2e885 5846 int ret;
8d35301d 5847
43c2e885
BF		 5848 ret = nfs4_verify_fore_channel_attrs(args, session);
5849 if (ret)
5850 return ret;
5851 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5852}
5853
848f5bda
TM		 5854static int _nfs4_proc_create_session(struct nfs_client *clp,
5855 struct rpc_cred *cred)
fc931582
AA		 5856{
5857 struct nfs4_session *session = clp->cl_session;
5858 struct nfs41_create_session_args args = {
5859 .client = clp,
5860 .cb_program = NFS4_CALLBACK,
5861 };
5862 struct nfs41_create_session_res res = {
5863 .client = clp,
5864 };
5865 struct rpc_message msg = {
5866 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5867 .rpc_argp = &args,
5868 .rpc_resp = &res,
848f5bda 5869 .rpc_cred = cred,
fc931582
AA		 5870 };
5871 int status;
5872
5873 nfs4_init_channel_attrs(&args);
0f91421e 5874 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5875
1bd714f2 5876 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5877
43095d39 5878 if (!status) {
8d35301d
AA		 5879 /* Verify the session's negotiated channel_attrs values */
5880 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5881 /* Increment the clientid slot sequence id */
5882 clp->cl_seqid++;
5883 }
5884
5885 return status;
5886}
5887
5888/*
5889 * Issues a CREATE_SESSION operation to the server.
5890 * It is the responsibility of the caller to verify the session is
5891 * expired before calling this routine.
5892 */
848f5bda 5893int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5894{
5895 int status;
5896 unsigned *ptr;
fc931582
AA		 5897 struct nfs4_session *session = clp->cl_session;
5898
5899 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5900
848f5bda 5901 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5902 if (status)
5903 goto out;
5904
aacd5537
AA		 5905 /* Init or reset the session slot tables */
5906 status = nfs4_setup_session_slot_tables(session);
5907 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5908 if (status)
5909 goto out;
5910
5911 ptr = (unsigned *)&session->sess_id.data[0];
5912 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5913 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5914out:
5915 dprintk("<-- %s\n", __func__);
5916 return status;
5917}
5918
0f3e66c6
AA		 5919/*
5920 * Issue the over-the-wire RPC DESTROY_SESSION.
5921 * The caller must serialize access to this routine.
5922 */
848f5bda
TM		 5923int nfs4_proc_destroy_session(struct nfs4_session *session,
5924 struct rpc_cred *cred)
0f3e66c6 5925{
848f5bda
TM		 5926 struct rpc_message msg = {
5927 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5928 .rpc_argp = session,
5929 .rpc_cred = cred,
5930 };
0f3e66c6 5931 int status = 0;
0f3e66c6
AA		 5932
5933 dprintk("--> nfs4_proc_destroy_session\n");
5934
5935 /* session is still being setup */
5936 if (session->clp->cl_cons_state != NFS_CS_READY)
5937 return status;
5938
1bd714f2 5939 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5940
5941 if (status)
08106ac7 5942 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5943 "Session has been destroyed regardless...\n", status);
5944
5945 dprintk("<-- nfs4_proc_destroy_session\n");
5946 return status;
5947}
5948
fc01cea9
AA		 5949/*
5950 * Renew the cl_session lease.
5951 */
d5f8d3fe
TM		 5952struct nfs4_sequence_data {
5953 struct nfs_client *clp;
5954 struct nfs4_sequence_args args;
5955 struct nfs4_sequence_res res;
5956};
5957
dc96aef9
AB		 5958static void nfs41_sequence_release(void *data)
5959{
d5f8d3fe
TM		 5960 struct nfs4_sequence_data *calldata = data;
5961 struct nfs_client *clp = calldata->clp;
dc96aef9 5962
7135840f
AB		 5963 if (atomic_read(&clp->cl_count) > 1)
5964 nfs4_schedule_state_renewal(clp);
5965 nfs_put_client(clp);
d5f8d3fe 5966 kfree(calldata);
dc96aef9
AB		 5967}
5968
aa5190d0
TM		 5969static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5970{
5971 switch(task->tk_status) {
5972 case -NFS4ERR_DELAY:
aa5190d0
TM		 5973 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5974 return -EAGAIN;
5975 default:
0400a6b0 5976 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5977 }
5978 return 0;
5979}
5980
dc96aef9 5981static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5982{
d5f8d3fe
TM		 5983 struct nfs4_sequence_data *calldata = data;
5984 struct nfs_client *clp = calldata->clp;
fc01cea9 5985
14516c3a
TM		 5986 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5987 return;
fc01cea9
AA		 5988
5989 if (task->tk_status < 0) {
5990 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5991 if (atomic_read(&clp->cl_count) == 1)
5992 goto out;
fc01cea9 5993
aa5190d0
TM		 5994 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5995 rpc_restart_call_prepare(task);
fc01cea9
AA		 5996 return;
5997 }
5998 }
fc01cea9 5999 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6000out:
fc01cea9
AA		 6001 dprintk("<-- %s\n", __func__);
6002}
6003
6004static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6005{
d5f8d3fe
TM		 6006 struct nfs4_sequence_data *calldata = data;
6007 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6008 struct nfs4_sequence_args *args;
6009 struct nfs4_sequence_res *res;
6010
fc01cea9
AA		 6011 args = task->tk_msg.rpc_argp;
6012 res = task->tk_msg.rpc_resp;
6013
d9afbd1b 6014 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 6015}
6016
6017static const struct rpc_call_ops nfs41_sequence_ops = {
6018 .rpc_call_done = nfs41_sequence_call_done,
6019 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6020 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6021};
6022
8fe72bac
TM		 6023static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6024 struct rpc_cred *cred,
6025 bool is_privileged)
fc01cea9 6026{
d5f8d3fe 6027 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6028 struct rpc_message msg = {
6029 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6030 .rpc_cred = cred,
6031 };
71ac6da9
TM		 6032 struct rpc_task_setup task_setup_data = {
6033 .rpc_client = clp->cl_rpcclient,
6034 .rpc_message = &msg,
8fe72bac 6035 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 6036 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 6037 };
fc01cea9 6038
7135840f 6039 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6040 return ERR_PTR(-EIO);
dfb4f309 6041 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6042 if (calldata == NULL) {
7135840f 6043 nfs_put_client(clp);
71ac6da9 6044 return ERR_PTR(-ENOMEM);
fc01cea9 6045 }
9d12b216 6046 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6047 if (is_privileged)
6048 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6049 msg.rpc_argp = &calldata->args;
6050 msg.rpc_resp = &calldata->res;
6051 calldata->clp = clp;
71ac6da9 6052 task_setup_data.callback_data = calldata;
fc01cea9 6053
71ac6da9
TM		 6054 return rpc_run_task(&task_setup_data);
6055}
6056
2f60ea6b 6057static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6058{
6059 struct rpc_task *task;
6060 int ret = 0;
6061
2f60ea6b
TM		 6062 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6063 return 0;
8fe72bac 6064 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6065 if (IS_ERR(task))
6066 ret = PTR_ERR(task);
6067 else
bf294b41 6068 rpc_put_task_async(task);
71ac6da9
TM		 6069 dprintk("<-- %s status=%d\n", __func__, ret);
6070 return ret;
6071}
6072
6073static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6074{
6075 struct rpc_task *task;
6076 int ret;
6077
8fe72bac 6078 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6079 if (IS_ERR(task)) {
6080 ret = PTR_ERR(task);
6081 goto out;
6082 }
6083 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6084 if (!ret) {
6085 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6086
6087 if (task->tk_status == 0)
6088 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6089 ret = task->tk_status;
b4410c2f 6090 }
71ac6da9
TM		 6091 rpc_put_task(task);
6092out:
6093 dprintk("<-- %s status=%d\n", __func__, ret);
6094 return ret;
fc01cea9
AA		 6095}
6096
fce5c838
RL		 6097struct nfs4_reclaim_complete_data {
6098 struct nfs_client *clp;
6099 struct nfs41_reclaim_complete_args arg;
6100 struct nfs41_reclaim_complete_res res;
6101};
6102
6103static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6104{
6105 struct nfs4_reclaim_complete_data *calldata = data;
6106
d9afbd1b
TM		 6107 nfs41_setup_sequence(calldata->clp->cl_session,
6108 &calldata->arg.seq_args,
6109 &calldata->res.seq_res,
6110 task);
fce5c838
RL		 6111}
6112
aa5190d0
TM		 6113static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6114{
6115 switch(task->tk_status) {
6116 case 0:
6117 case -NFS4ERR_COMPLETE_ALREADY:
6118 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6119 break;
6120 case -NFS4ERR_DELAY:
aa5190d0 6121 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6122 /* fall through */
6123 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6124 return -EAGAIN;
6125 default:
0400a6b0 6126 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6127 }
6128 return 0;
6129}
6130
fce5c838
RL		 6131static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6132{
6133 struct nfs4_reclaim_complete_data *calldata = data;
6134 struct nfs_client *clp = calldata->clp;
6135 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6136
6137 dprintk("--> %s\n", __func__);
14516c3a
TM		 6138 if (!nfs41_sequence_done(task, res))
6139 return;
fce5c838 6140
aa5190d0
TM		 6141 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6142 rpc_restart_call_prepare(task);
6143 return;
6144 }
fce5c838
RL		 6145 dprintk("<-- %s\n", __func__);
6146}
6147
6148static void nfs4_free_reclaim_complete_data(void *data)
6149{
6150 struct nfs4_reclaim_complete_data *calldata = data;
6151
6152 kfree(calldata);
6153}
6154
6155static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6156 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6157 .rpc_call_done = nfs4_reclaim_complete_done,
6158 .rpc_release = nfs4_free_reclaim_complete_data,
6159};
6160
6161/*
6162 * Issue a global reclaim complete.
6163 */
6164static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6165{
6166 struct nfs4_reclaim_complete_data *calldata;
6167 struct rpc_task *task;
6168 struct rpc_message msg = {
6169 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6170 };
6171 struct rpc_task_setup task_setup_data = {
6172 .rpc_client = clp->cl_rpcclient,
6173 .rpc_message = &msg,
6174 .callback_ops = &nfs4_reclaim_complete_call_ops,
6175 .flags = RPC_TASK_ASYNC,
6176 };
6177 int status = -ENOMEM;
6178
6179 dprintk("--> %s\n", __func__);
8535b2be 6180 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6181 if (calldata == NULL)
6182 goto out;
6183 calldata->clp = clp;
6184 calldata->arg.one_fs = 0;
fce5c838 6185
9d12b216 6186 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6187 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6188 msg.rpc_argp = &calldata->arg;
6189 msg.rpc_resp = &calldata->res;
6190 task_setup_data.callback_data = calldata;
6191 task = rpc_run_task(&task_setup_data);
acf82b85 6192 if (IS_ERR(task)) {
fce5c838 6193 status = PTR_ERR(task);
acf82b85
DC		 6194 goto out;
6195 }
c34c32ea
AA		 6196 status = nfs4_wait_for_completion_rpc_task(task);
6197 if (status == 0)
6198 status = task->tk_status;
fce5c838 6199 rpc_put_task(task);
acf82b85 6200 return 0;
fce5c838
RL		 6201out:
6202 dprintk("<-- %s status=%d\n", __func__, status);
6203 return status;
6204}
b1f69b75
AA		 6205
6206static void
6207nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6208{
6209 struct nfs4_layoutget *lgp = calldata;
c31663d4 6210 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6211 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6212
6213 dprintk("--> %s\n", __func__);
c31663d4
FI		 6214 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6215 * right now covering the LAYOUTGET we are about to send.
6216 * However, that is not so catastrophic, and there seems
6217 * to be no way to prevent it completely.
6218 */
6ba7db34 6219 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6220 &lgp->res.seq_res, task))
b1f69b75 6221 return;
cf7d63f1
FI		 6222 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6223 NFS_I(lgp->args.inode)->layout,
6224 lgp->args.ctx->state)) {
6225 rpc_exit(task, NFS4_OK);
cf7d63f1 6226 }
b1f69b75
AA		 6227}
6228
6229static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6230{
6231 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6232 struct inode *inode = lgp->args.inode;
6233 struct nfs_server *server = NFS_SERVER(inode);
6234 struct pnfs_layout_hdr *lo;
6235 struct nfs4_state *state = NULL;
305a7c62 6236 unsigned long timeo, now, giveup;
b1f69b75 6237
305a7c62 6238 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 6239
6ba7db34 6240 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6241 goto out;
b1f69b75
AA		 6242
6243 switch (task->tk_status) {
6244 case 0:
ee314c2a 6245 goto out;
305a7c62
BH		 6246 /*
6247 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
6248 * (or clients) writing to the same RAID stripe
6249 */
b1f69b75 6250 case -NFS4ERR_LAYOUTTRYLATER:
305a7c62
BH		 6251 /*
6252 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
6253 * existing layout before getting a new one).
6254 */
b1f69b75 6255 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6256 timeo = rpc_get_timeout(task->tk_client);
6257 giveup = lgp->args.timestamp + timeo;
305a7c62
BH		 6258 now = jiffies;
6259 if (time_after(giveup, now)) {
6260 unsigned long delay;
6261
6262 /* Delay for:
6263 * - Not less then NFS4_POLL_RETRY_MIN.
6264 * - One last time a jiffie before we give up
6265 * - exponential backoff (time_now minus start_attempt)
6266 */
6267 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
6268 min((giveup - now - 1),
6269 now - lgp->args.timestamp));
6270
6271 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
6272 __func__, delay);
6273 rpc_delay(task, delay);
6274 task->tk_status = 0;
6275 rpc_restart_call_prepare(task);
6276 goto out; /* Do not call nfs4_async_handle_error() */
6277 }
ee314c2a
TM		 6278 break;
6279 case -NFS4ERR_EXPIRED:
6280 case -NFS4ERR_BAD_STATEID:
6281 spin_lock(&inode->i_lock);
6282 lo = NFS_I(inode)->layout;
6283 if (!lo || list_empty(&lo->plh_segs)) {
6284 spin_unlock(&inode->i_lock);
6285 /* If the open stateid was bad, then recover it. */
6286 state = lgp->args.ctx->state;
6287 } else {
6288 LIST_HEAD(head);
6289
6290 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6291 spin_unlock(&inode->i_lock);
6292 /* Mark the bad layout state as invalid, then
6293 * retry using the open stateid. */
6294 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6295 }
6296 }
ee314c2a
TM		 6297 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6298 rpc_restart_call_prepare(task);
6299out:
b1f69b75
AA		 6300 dprintk("<-- %s\n", __func__);
6301}
6302
8554116e
IK		 6303static size_t max_response_pages(struct nfs_server *server)
6304{
6305 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6306 return nfs_page_array_len(0, max_resp_sz);
6307}
6308
6309static void nfs4_free_pages(struct page **pages, size_t size)
6310{
6311 int i;
6312
6313 if (!pages)
6314 return;
6315
6316 for (i = 0; i < size; i++) {
6317 if (!pages[i])
6318 break;
6319 __free_page(pages[i]);
6320 }
6321 kfree(pages);
6322}
6323
6324static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6325{
6326 struct page **pages;
6327 int i;
6328
6329 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6330 if (!pages) {
6331 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6332 return NULL;
6333 }
6334
6335 for (i = 0; i < size; i++) {
6336 pages[i] = alloc_page(gfp_flags);
6337 if (!pages[i]) {
6338 dprintk("%s: failed to allocate page\n", __func__);
6339 nfs4_free_pages(pages, size);
6340 return NULL;
6341 }
6342 }
6343
6344 return pages;
6345}
6346
b1f69b75
AA		 6347static void nfs4_layoutget_release(void *calldata)
6348{
6349 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6350 struct inode *inode = lgp->args.inode;
6351 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6352 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6353
6354 dprintk("--> %s\n", __func__);
8554116e 6355 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6356 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6357 put_nfs_open_context(lgp->args.ctx);
6358 kfree(calldata);
6359 dprintk("<-- %s\n", __func__);
6360}
6361
6362static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6363 .rpc_call_prepare = nfs4_layoutget_prepare,
6364 .rpc_call_done = nfs4_layoutget_done,
6365 .rpc_release = nfs4_layoutget_release,
6366};
6367
a0b0a6e3
TM		 6368struct pnfs_layout_segment *
6369nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6370{
a47970ff
WAA		 6371 struct inode *inode = lgp->args.inode;
6372 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6373 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6374 struct rpc_task *task;
6375 struct rpc_message msg = {
6376 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6377 .rpc_argp = &lgp->args,
6378 .rpc_resp = &lgp->res,
6379 };
6380 struct rpc_task_setup task_setup_data = {
6381 .rpc_client = server->client,
6382 .rpc_message = &msg,
6383 .callback_ops = &nfs4_layoutget_call_ops,
6384 .callback_data = lgp,
6385 .flags = RPC_TASK_ASYNC,
6386 };
a0b0a6e3 6387 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6388 int status = 0;
6389
6390 dprintk("--> %s\n", __func__);
6391
8554116e
IK		 6392 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6393 if (!lgp->args.layout.pages) {
6394 nfs4_layoutget_release(lgp);
a0b0a6e3 6395 return ERR_PTR(-ENOMEM);
8554116e
IK		 6396 }
6397 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6398 lgp->args.timestamp = jiffies;
8554116e 6399
35124a09 6400 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6401 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6402 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6403
6404 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6405 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6406
b1f69b75
AA		 6407 task = rpc_run_task(&task_setup_data);
6408 if (IS_ERR(task))
a0b0a6e3 6409 return ERR_CAST(task);
b1f69b75 6410 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6411 if (status == 0)
6412 status = task->tk_status;
085b7a45
WAA		 6413 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6414 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6415 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6416 rpc_put_task(task);
6417 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6418 if (status)
6419 return ERR_PTR(status);
6420 return lseg;
b1f69b75
AA		 6421}
6422
cbe82603
BH		 6423static void
6424nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6425{
6426 struct nfs4_layoutreturn *lrp = calldata;
6427
6428 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6429 nfs41_setup_sequence(lrp->clp->cl_session,
6430 &lrp->args.seq_args,
6431 &lrp->res.seq_res,
6432 task);
cbe82603
BH		 6433}
6434
6435static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6436{
6437 struct nfs4_layoutreturn *lrp = calldata;
6438 struct nfs_server *server;
6439
6440 dprintk("--> %s\n", __func__);
6441
6ba7db34 6442 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6443 return;
6444
6445 server = NFS_SERVER(lrp->args.inode);
6446 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6447 rpc_restart_call_prepare(task);
cbe82603
BH		 6448 return;
6449 }
cbe82603
BH		 6450 dprintk("<-- %s\n", __func__);
6451}
6452
6453static void nfs4_layoutreturn_release(void *calldata)
6454{
6455 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6456 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6457
6458 dprintk("--> %s\n", __func__);
849b286f
TM		 6459 spin_lock(&lo->plh_inode->i_lock);
6460 if (lrp->res.lrs_present)
6461 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6462 lo->plh_block_lgets--;
6463 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6464 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6465 kfree(calldata);
6466 dprintk("<-- %s\n", __func__);
6467}
6468
6469static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6470 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6471 .rpc_call_done = nfs4_layoutreturn_done,
6472 .rpc_release = nfs4_layoutreturn_release,
6473};
6474
6475int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6476{
6477 struct rpc_task *task;
6478 struct rpc_message msg = {
6479 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6480 .rpc_argp = &lrp->args,
6481 .rpc_resp = &lrp->res,
6482 };
6483 struct rpc_task_setup task_setup_data = {
6484 .rpc_client = lrp->clp->cl_rpcclient,
6485 .rpc_message = &msg,
6486 .callback_ops = &nfs4_layoutreturn_call_ops,
6487 .callback_data = lrp,
6488 };
6489 int status;
6490
6491 dprintk("--> %s\n", __func__);
9d12b216 6492 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6493 task = rpc_run_task(&task_setup_data);
6494 if (IS_ERR(task))
6495 return PTR_ERR(task);
6496 status = task->tk_status;
6497 dprintk("<-- %s status=%d\n", __func__, status);
6498 rpc_put_task(task);
6499 return status;
6500}
6501
7f11d8d3
AA		 6502/*
6503 * Retrieve the list of Data Server devices from the MDS.
6504 */
6505static int _nfs4_getdevicelist(struct nfs_server *server,
6506 const struct nfs_fh *fh,
6507 struct pnfs_devicelist *devlist)
6508{
6509 struct nfs4_getdevicelist_args args = {
6510 .fh = fh,
6511 .layoutclass = server->pnfs_curr_ld->id,
6512 };
6513 struct nfs4_getdevicelist_res res = {
6514 .devlist = devlist,
6515 };
6516 struct rpc_message msg = {
6517 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6518 .rpc_argp = &args,
6519 .rpc_resp = &res,
6520 };
6521 int status;
6522
6523 dprintk("--> %s\n", __func__);
6524 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6525 &res.seq_res, 0);
6526 dprintk("<-- %s status=%d\n", __func__, status);
6527 return status;
6528}
6529
6530int nfs4_proc_getdevicelist(struct nfs_server *server,
6531 const struct nfs_fh *fh,
6532 struct pnfs_devicelist *devlist)
6533{
6534 struct nfs4_exception exception = { };
6535 int err;
6536
6537 do {
6538 err = nfs4_handle_exception(server,
6539 _nfs4_getdevicelist(server, fh, devlist),
6540 &exception);
6541 } while (exception.retry);
6542
6543 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6544 err, devlist->num_devs);
6545
6546 return err;
6547}
6548EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6549
b1f69b75
AA		 6550static int
6551_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6552{
6553 struct nfs4_getdeviceinfo_args args = {
6554 .pdev = pdev,
6555 };
6556 struct nfs4_getdeviceinfo_res res = {
6557 .pdev = pdev,
6558 };
6559 struct rpc_message msg = {
6560 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6561 .rpc_argp = &args,
6562 .rpc_resp = &res,
6563 };
6564 int status;
6565
6566 dprintk("--> %s\n", __func__);
7c513058 6567 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6568 dprintk("<-- %s status=%d\n", __func__, status);
6569
6570 return status;
6571}
6572
6573int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6574{
6575 struct nfs4_exception exception = { };
6576 int err;
6577
6578 do {
6579 err = nfs4_handle_exception(server,
6580 _nfs4_proc_getdeviceinfo(server, pdev),
6581 &exception);
6582 } while (exception.retry);
6583 return err;
6584}
6585EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6586
863a3c6c
AA		 6587static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6588{
6589 struct nfs4_layoutcommit_data *data = calldata;
6590 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6591 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6592
d9afbd1b
TM		 6593 nfs41_setup_sequence(session,
6594 &data->args.seq_args,
6595 &data->res.seq_res,
6596 task);
863a3c6c
AA		 6597}
6598
6599static void
6600nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6601{
6602 struct nfs4_layoutcommit_data *data = calldata;
6603 struct nfs_server *server = NFS_SERVER(data->args.inode);
6604
6ba7db34 6605 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6606 return;
6607
6608 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6609 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6610 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6611 case -NFS4ERR_BADLAYOUT: /* no layout */
6612 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6613 task->tk_status = 0;
e59d27e0
TM		 6614 break;
6615 case 0:
863a3c6c
AA		 6616 nfs_post_op_update_inode_force_wcc(data->args.inode,
6617 data->res.fattr);
e59d27e0
TM		 6618 break;
6619 default:
6620 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6621 rpc_restart_call_prepare(task);
6622 return;
6623 }
6624 }
863a3c6c
AA		 6625}
6626
6627static void nfs4_layoutcommit_release(void *calldata)
6628{
6629 struct nfs4_layoutcommit_data *data = calldata;
6630
db29c089 6631 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 6632 put_rpccred(data->cred);
6633 kfree(data);
6634}
6635
6636static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6637 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6638 .rpc_call_done = nfs4_layoutcommit_done,
6639 .rpc_release = nfs4_layoutcommit_release,
6640};
6641
6642int
ef311537 6643nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6644{
6645 struct rpc_message msg = {
6646 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6647 .rpc_argp = &data->args,
6648 .rpc_resp = &data->res,
6649 .rpc_cred = data->cred,
6650 };
6651 struct rpc_task_setup task_setup_data = {
6652 .task = &data->task,
6653 .rpc_client = NFS_CLIENT(data->args.inode),
6654 .rpc_message = &msg,
6655 .callback_ops = &nfs4_layoutcommit_ops,
6656 .callback_data = data,
6657 .flags = RPC_TASK_ASYNC,
6658 };
6659 struct rpc_task *task;
6660 int status = 0;
6661
6662 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6663 "lbw: %llu inode %lu\n",
6664 data->task.tk_pid, sync,
6665 data->args.lastbytewritten,
6666 data->args.inode->i_ino);
6667
9d12b216 6668 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6669 task = rpc_run_task(&task_setup_data);
6670 if (IS_ERR(task))
6671 return PTR_ERR(task);
ef311537 6672 if (sync == false)
863a3c6c
AA		 6673 goto out;
6674 status = nfs4_wait_for_completion_rpc_task(task);
6675 if (status != 0)
6676 goto out;
6677 status = task->tk_status;
6678out:
6679 dprintk("%s: status %d\n", __func__, status);
6680 rpc_put_task(task);
6681 return status;
6682}
fca78d6d
BS		 6683
6684static int
6685_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6686 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6687{
6688 struct nfs41_secinfo_no_name_args args = {
6689 .style = SECINFO_STYLE_CURRENT_FH,
6690 };
6691 struct nfs4_secinfo_res res = {
6692 .flavors = flavors,
6693 };
6694 struct rpc_message msg = {
6695 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6696 .rpc_argp = &args,
6697 .rpc_resp = &res,
6698 };
6699 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6700}
6701
6702static int
6703nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6704 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6705{
6706 struct nfs4_exception exception = { };
6707 int err;
6708 do {
6709 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6710 switch (err) {
6711 case 0:
6712 case -NFS4ERR_WRONGSEC:
c1942219 6713 case -ENOTSUPP:
05e9cfb4 6714 goto out;
fca78d6d
BS		 6715 default:
6716 err = nfs4_handle_exception(server, err, &exception);
6717 }
6718 } while (exception.retry);
05e9cfb4 6719out:
fca78d6d
BS		 6720 return err;
6721}
6722
6723static int
6724nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6725 struct nfs_fsinfo *info)
6726{
6727 int err;
6728 struct page *page;
6729 rpc_authflavor_t flavor;
6730 struct nfs4_secinfo_flavors *flavors;
6731
6732 page = alloc_page(GFP_KERNEL);
6733 if (!page) {
6734 err = -ENOMEM;
6735 goto out;
6736 }
6737
6738 flavors = page_address(page);
6739 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6740
6741 /*
6742 * Fall back on "guess and check" method if
6743 * the server doesn't support SECINFO_NO_NAME
6744 */
c1942219 6745 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 6746 err = nfs4_find_root_sec(server, fhandle, info);
6747 goto out_freepage;
6748 }
6749 if (err)
6750 goto out_freepage;
6751
6752 flavor = nfs_find_best_sec(flavors);
6753 if (err == 0)
6754 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6755
6756out_freepage:
6757 put_page(page);
6758 if (err == -EACCES)
6759 return -EPERM;
6760out:
6761 return err;
6762}
1cab0652
BS		 6763
6764static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6765{
6766 int status;
6767 struct nfs41_test_stateid_args args = {
1cab0652 6768 .stateid = stateid,
7d974794
BS		 6769 };
6770 struct nfs41_test_stateid_res res;
6771 struct rpc_message msg = {
6772 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6773 .rpc_argp = &args,
6774 .rpc_resp = &res,
6775 };
1cab0652 6776
38527b15 6777 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6778 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6779 nfs4_set_sequence_privileged(&args.seq_args);
6780 status = nfs4_call_sync_sequence(server->client, server, &msg,
6781 &args.seq_args, &res.seq_res);
38527b15
CL		 6782 if (status != NFS_OK) {
6783 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6784 return status;
38527b15
CL		 6785 }
6786 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6787 return -res.status;
7d974794
BS		 6788}
6789
38527b15
CL		 6790/**
6791 * nfs41_test_stateid - perform a TEST_STATEID operation
6792 *
6793 * @server: server / transport on which to perform the operation
6794 * @stateid: state ID to test
6795 *
6796 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6797 * Otherwise a negative NFS4ERR value is returned if the operation
6798 * failed or the state ID is not currently valid.
6799 */
1cab0652 6800static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6801{
6802 struct nfs4_exception exception = { };
6803 int err;
6804 do {
377e507d
CL		 6805 err = _nfs41_test_stateid(server, stateid);
6806 if (err != -NFS4ERR_DELAY)
6807 break;
6808 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6809 } while (exception.retry);
6810 return err;
6811}
9aeda35f 6812
7c1d5fae
TM		 6813struct nfs_free_stateid_data {
6814 struct nfs_server *server;
6815 struct nfs41_free_stateid_args args;
9aeda35f 6816 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 6817};
6818
6819static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
6820{
6821 struct nfs_free_stateid_data *data = calldata;
6822 nfs41_setup_sequence(nfs4_get_session(data->server),
6823 &data->args.seq_args,
6824 &data->res.seq_res,
6825 task);
6826}
6827
6828static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
6829{
6830 struct nfs_free_stateid_data *data = calldata;
6831
6832 nfs41_sequence_done(task, &data->res.seq_res);
6833
6834 switch (task->tk_status) {
6835 case -NFS4ERR_DELAY:
6836 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
6837 rpc_restart_call_prepare(task);
6838 }
6839}
6840
6841static void nfs41_free_stateid_release(void *calldata)
6842{
6843 kfree(calldata);
6844}
6845
6846const struct rpc_call_ops nfs41_free_stateid_ops = {
6847 .rpc_call_prepare = nfs41_free_stateid_prepare,
6848 .rpc_call_done = nfs41_free_stateid_done,
6849 .rpc_release = nfs41_free_stateid_release,
6850};
6851
6852static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
6853 nfs4_stateid *stateid,
6854 bool privileged)
6855{
9aeda35f
BS		 6856 struct rpc_message msg = {
6857 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
9aeda35f 6858 };
7c1d5fae
TM		 6859 struct rpc_task_setup task_setup = {
6860 .rpc_client = server->client,
6861 .rpc_message = &msg,
6862 .callback_ops = &nfs41_free_stateid_ops,
6863 .flags = RPC_TASK_ASYNC,
6864 };
6865 struct nfs_free_stateid_data *data;
9aeda35f 6866
38527b15 6867 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 6868 data = kmalloc(sizeof(*data), GFP_NOFS);
6869 if (!data)
6870 return ERR_PTR(-ENOMEM);
6871 data->server = server;
6872 nfs4_stateid_copy(&data->args.stateid, stateid);
6873
6874 task_setup.callback_data = data;
6875
6876 msg.rpc_argp = &data->args;
6877 msg.rpc_resp = &data->res;
6878 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
6879 if (privileged)
6880 nfs4_set_sequence_privileged(&data->args.seq_args);
6881
6882 return rpc_run_task(&task_setup);
9aeda35f
BS		 6883}
6884
38527b15
CL		 6885/**
6886 * nfs41_free_stateid - perform a FREE_STATEID operation
6887 *
6888 * @server: server / transport on which to perform the operation
6889 * @stateid: state ID to release
6890 *
6891 * Returns NFS_OK if the server freed "stateid". Otherwise a
6892 * negative NFS4ERR value is returned.
6893 */
1cab0652 6894static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6895{
7c1d5fae
TM		 6896 struct rpc_task *task;
6897 int ret;
6898
6899 task = _nfs41_free_stateid(server, stateid, true);
6900 if (IS_ERR(task))
6901 return PTR_ERR(task);
6902 ret = rpc_wait_for_completion_task(task);
6903 if (!ret)
6904 ret = task->tk_status;
6905 rpc_put_task(task);
6906 return ret;
9aeda35f 6907}
36281caa 6908
c8b2d0bf
TM		 6909static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
6910{
6911 struct rpc_task *task;
6912
6913 task = _nfs41_free_stateid(server, &lsp->ls_stateid, false);
6914 nfs4_free_lock_state(server, lsp);
6915 if (IS_ERR(task))
6916 return PTR_ERR(task);
6917 rpc_put_task(task);
6918 return 0;
6919}
6920
36281caa
TM		 6921static bool nfs41_match_stateid(const nfs4_stateid *s1,
6922 const nfs4_stateid *s2)
6923{
2d2f24ad 6924 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6925 return false;
6926
2d2f24ad 6927 if (s1->seqid == s2->seqid)
36281caa 6928 return true;
2d2f24ad 6929 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6930 return true;
6931
6932 return false;
6933}
6934
557134a3
AA		 6935#endif /* CONFIG_NFS_V4_1 */
6936
36281caa
TM		 6937static bool nfs4_match_stateid(const nfs4_stateid *s1,
6938 const nfs4_stateid *s2)
6939{
f597c537 6940 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6941}
6942
6943
17280175 6944static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6945 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6946 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6947 .recover_open = nfs4_open_reclaim,
6948 .recover_lock = nfs4_lock_reclaim,
591d71cb 6949 .establish_clid = nfs4_init_clientid,
90a16617 6950 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6951 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6952};
6953
591d71cb 6954#if defined(CONFIG_NFS_V4_1)
17280175 6955static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6956 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6957 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6958 .recover_open = nfs4_open_reclaim,
6959 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6960 .establish_clid = nfs41_init_clientid,
b4b82607 6961 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6962 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6963 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6964};
6965#endif /* CONFIG_NFS_V4_1 */
6966
17280175 6967static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6968 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6969 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6970 .recover_open = nfs4_open_expired,
6971 .recover_lock = nfs4_lock_expired,
6972 .establish_clid = nfs4_init_clientid,
90a16617 6973 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6974};
6975
6976#if defined(CONFIG_NFS_V4_1)
17280175 6977static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6978 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6979 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6980 .recover_open = nfs41_open_expired,
6981 .recover_lock = nfs41_lock_expired,
4d643d1d 6982 .establish_clid = nfs41_init_clientid,
b4b82607 6983 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6984};
591d71cb 6985#endif /* CONFIG_NFS_V4_1 */
1da177e4 6986
17280175 6987static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6988 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6989 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6990 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6991};
6992
6993#if defined(CONFIG_NFS_V4_1)
17280175 6994static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6995 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6996 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6997 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6998};
6999#endif
7000
97dc1359
TM		 7001static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7002 .minor_version = 0,
39c6daae
TM		 7003 .init_caps = NFS_CAP_READDIRPLUS
7004 | NFS_CAP_ATOMIC_OPEN
7005 | NFS_CAP_CHANGE_ATTR
7006 | NFS_CAP_POSIX_LOCK,
97dc1359 7007 .call_sync = _nfs4_call_sync,
36281caa 7008 .match_stateid = nfs4_match_stateid,
fca78d6d 7009 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 7010 .free_lock_state = nfs4_release_lockowner,
c48f4f35
TM		 7011 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7012 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7013 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 7014};
7015
7016#if defined(CONFIG_NFS_V4_1)
7017static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7018 .minor_version = 1,
39c6daae
TM		 7019 .init_caps = NFS_CAP_READDIRPLUS
7020 | NFS_CAP_ATOMIC_OPEN
7021 | NFS_CAP_CHANGE_ATTR
3b66486c 7022 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 7023 | NFS_CAP_STATEID_NFSV41
7024 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 7025 .call_sync = nfs4_call_sync_sequence,
36281caa 7026 .match_stateid = nfs41_match_stateid,
fca78d6d 7027 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 7028 .free_lock_state = nfs41_free_lock_state,
c48f4f35
TM		 7029 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7030 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7031 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 7032};
7033#endif
7034
97dc1359
TM		 7035const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7036 [0] = &nfs_v4_0_minor_ops,
7037#if defined(CONFIG_NFS_V4_1)
7038 [1] = &nfs_v4_1_minor_ops,
7039#endif
7040};
7041
73a79706
BS		 7042const struct inode_operations nfs4_dir_inode_operations = {
7043 .create = nfs_create,
7044 .lookup = nfs_lookup,
7045 .atomic_open = nfs_atomic_open,
7046 .link = nfs_link,
7047 .unlink = nfs_unlink,
7048 .symlink = nfs_symlink,
7049 .mkdir = nfs_mkdir,
7050 .rmdir = nfs_rmdir,
7051 .mknod = nfs_mknod,
7052 .rename = nfs_rename,
7053 .permission = nfs_permission,
7054 .getattr = nfs_getattr,
7055 .setattr = nfs_setattr,
7056 .getxattr = generic_getxattr,
7057 .setxattr = generic_setxattr,
7058 .listxattr = generic_listxattr,
7059 .removexattr = generic_removexattr,
7060};
7061
92e1d5be 7062static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 7063 .permission = nfs_permission,
7064 .getattr = nfs_getattr,
7065 .setattr = nfs_setattr,
64c2ce8b
AK		 7066 .getxattr = generic_getxattr,
7067 .setxattr = generic_setxattr,
7068 .listxattr = generic_listxattr,
7069 .removexattr = generic_removexattr,
6b3b5496
BF		 7070};
7071
509de811 7072const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 7073 .version = 4, /* protocol version */
7074 .dentry_ops = &nfs4_dentry_operations,
7075 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 7076 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 7077 .file_ops = &nfs4_file_operations,
1da177e4 7078 .getroot = nfs4_proc_get_root,
281cad46 7079 .submount = nfs4_submount,
ff9099f2 7080 .try_mount = nfs4_try_mount,
1da177e4
LT		 7081 .getattr = nfs4_proc_getattr,
7082 .setattr = nfs4_proc_setattr,
7083 .lookup = nfs4_proc_lookup,
7084 .access = nfs4_proc_access,
7085 .readlink = nfs4_proc_readlink,
1da177e4
LT		 7086 .create = nfs4_proc_create,
7087 .remove = nfs4_proc_remove,
7088 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 7089 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 7090 .unlink_done = nfs4_proc_unlink_done,
7091 .rename = nfs4_proc_rename,
d3d4152a 7092 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 7093 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 7094 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 7095 .link = nfs4_proc_link,
7096 .symlink = nfs4_proc_symlink,
7097 .mkdir = nfs4_proc_mkdir,
7098 .rmdir = nfs4_proc_remove,
7099 .readdir = nfs4_proc_readdir,
7100 .mknod = nfs4_proc_mknod,
7101 .statfs = nfs4_proc_statfs,
7102 .fsinfo = nfs4_proc_fsinfo,
7103 .pathconf = nfs4_proc_pathconf,
e9326dca 7104 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7105 .decode_dirent = nfs4_decode_dirent,
7106 .read_setup = nfs4_proc_read_setup,
1abb5088 7107 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7108 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7109 .read_done = nfs4_read_done,
1da177e4 7110 .write_setup = nfs4_proc_write_setup,
57208fa7 7111 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7112 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7113 .write_done = nfs4_write_done,
1da177e4 7114 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7115 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7116 .commit_done = nfs4_commit_done,
1da177e4 7117 .lock = nfs4_proc_lock,
e50a1c2e 7118 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7119 .close_context = nfs4_close_context,
2b484297 7120 .open_context = nfs4_atomic_open,
011e2a7f 7121 .have_delegation = nfs4_have_delegation,
57ec14c5 7122 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7123 .alloc_client = nfs4_alloc_client,
45a52a02 7124 .init_client = nfs4_init_client,
cdb7eced 7125 .free_client = nfs4_free_client,
1179acc6
BS		 7126 .create_server = nfs4_create_server,
7127 .clone_server = nfs_clone_server,
1da177e4
LT		 7128};
7129
64c2ce8b
AK		 7130static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7131 .prefix = XATTR_NAME_NFSV4_ACL,
7132 .list = nfs4_xattr_list_nfs4_acl,
7133 .get = nfs4_xattr_get_nfs4_acl,
7134 .set = nfs4_xattr_set_nfs4_acl,
7135};
7136
7137const struct xattr_handler *nfs4_xattr_handlers[] = {
7138 &nfs4_xattr_nfs4_acl_handler,
7139 NULL
7140};
7141
1da177e4
LT		 7142/*
7143 * Local variables:
7144 * c-basic-offset: 8
7145 * End:
7146 */
kernel source for telekom puls (alcatel/mediatek)