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NFSv4.1: Use the more efficient open_noattr call for open-by-filehandle
[mirror_ubuntu-hirsute-kernel.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4
LT		 68
69#define NFSDBG_FACILITY NFSDBG_PROC
70
2066fe89 71#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 72#define NFS4_POLL_RETRY_MAX (15*HZ)
73
cdd4e68b 74struct nfs4_opendata;
864472e9 75static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 76static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 77static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 78static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 79static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
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);
a2118c33 575 if (test_bit(NFS4_SESSION_DRAINING, &session->session_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;
24ac23ab
TM		 772 int rpc_status;
773 int cancelled;
e56e0b78
TM		 774};
775
49f9a0fa
TM		 776static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
777 int err, struct nfs4_exception *exception)
778{
779 if (err != -EINVAL)
780 return false;
781 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
782 return false;
783 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
784 exception->retry = 1;
785 return true;
786}
787
788static enum open_claim_type4
789nfs4_map_atomic_open_claim(struct nfs_server *server,
790 enum open_claim_type4 claim)
791{
792 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
793 return claim;
794 switch (claim) {
795 default:
796 return claim;
797 case NFS4_OPEN_CLAIM_FH:
798 return NFS4_OPEN_CLAIM_NULL;
799 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
800 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
801 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
802 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
803 }
804}
2ced46c2
TM		 805
806static void nfs4_init_opendata_res(struct nfs4_opendata *p)
807{
808 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 809 p->o_res.seqid = p->o_arg.seqid;
810 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 811 p->o_res.server = p->o_arg.server;
5f657530 812 p->o_res.access_request = p->o_arg.access;
2ced46c2 813 nfs_fattr_init(&p->f_attr);
6926afd1 814 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 815}
816
82a2c1b7 817static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 818 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 819 const struct iattr *attrs,
4a1c0893 820 enum open_claim_type4 claim,
8535b2be 821 gfp_t gfp_mask)
e56e0b78 822{
82a2c1b7 823 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 824 struct inode *dir = parent->d_inode;
825 struct nfs_server *server = NFS_SERVER(dir);
826 struct nfs4_opendata *p;
827
8535b2be 828 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 829 if (p == NULL)
830 goto err;
8535b2be 831 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 832 if (p->o_arg.seqid == NULL)
833 goto err_free;
82a2c1b7
AV		 834 nfs_sb_active(dentry->d_sb);
835 p->dentry = dget(dentry);
e56e0b78
TM		 836 p->dir = parent;
837 p->owner = sp;
838 atomic_inc(&sp->so_count);
dc0b027d
TM		 839 p->o_arg.open_flags = flags;
840 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 841 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
842 * will return permission denied for all bits until close */
843 if (!(flags & O_EXCL)) {
844 /* ask server to check for all possible rights as results
845 * are cached */
846 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
847 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 848 }
7539bbab 849 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 850 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
851 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 852 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 853 p->o_arg.server = server;
854 p->o_arg.bitmask = server->attr_bitmask;
1549210f 855 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
49f9a0fa
TM		 856 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
857 switch (p->o_arg.claim) {
4a1c0893
TM		 858 case NFS4_OPEN_CLAIM_NULL:
859 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
860 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
861 p->o_arg.fh = NFS_FH(dir);
862 break;
863 case NFS4_OPEN_CLAIM_PREVIOUS:
864 case NFS4_OPEN_CLAIM_FH:
865 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
866 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
867 p->o_arg.fh = NFS_FH(dentry->d_inode);
868 }
536e43d1 869 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 870 __be32 verf[2];
d77d76ff 871
e56e0b78
TM		 872 p->o_arg.u.attrs = &p->attrs;
873 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 874
875 verf[0] = jiffies;
876 verf[1] = current->pid;
877 memcpy(p->o_arg.u.verifier.data, verf,
878 sizeof(p->o_arg.u.verifier.data));
e56e0b78 879 }
cdd4e68b
TM		 880 p->c_arg.fh = &p->o_res.fh;
881 p->c_arg.stateid = &p->o_res.stateid;
882 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 883 nfs4_init_opendata_res(p);
c6d00e63 884 kref_init(&p->kref);
e56e0b78
TM		 885 return p;
886err_free:
887 kfree(p);
888err:
889 dput(parent);
890 return NULL;
891}
892
c6d00e63 893static void nfs4_opendata_free(struct kref *kref)
e56e0b78 894{
c6d00e63
TM		 895 struct nfs4_opendata *p = container_of(kref,
896 struct nfs4_opendata, kref);
82a2c1b7 897 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 898
899 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 900 if (p->state != NULL)
901 nfs4_put_open_state(p->state);
c6d00e63
TM		 902 nfs4_put_state_owner(p->owner);
903 dput(p->dir);
82a2c1b7
AV		 904 dput(p->dentry);
905 nfs_sb_deactive(sb);
6926afd1 906 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 907 kfree(p);
908}
909
910static void nfs4_opendata_put(struct nfs4_opendata *p)
911{
912 if (p != NULL)
913 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 914}
915
06f814a3
TM		 916static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
917{
06f814a3
TM		 918 int ret;
919
06f814a3 920 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 921 return ret;
922}
923
dc0b027d 924static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 925{
926 int ret = 0;
dc0b027d 927
536e43d1 928 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 929 goto out;
930 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 931 case FMODE_READ:
88069f77
TM		 932 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
933 && state->n_rdonly != 0;
6ee41268
TM		 934 break;
935 case FMODE_WRITE:
88069f77
TM		 936 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
937 && state->n_wronly != 0;
6ee41268
TM		 938 break;
939 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 940 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
941 && state->n_rdwr != 0;
6ee41268 942 }
dc0b027d 943out:
6ee41268
TM		 944 return ret;
945}
946
dc0b027d 947static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 948{
652f89f6
TM		 949 if (delegation == NULL)
950 return 0;
dc0b027d 951 if ((delegation->type & fmode) != fmode)
aac00a8d 952 return 0;
15c831bf 953 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 954 return 0;
d25be546
TM		 955 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
956 return 0;
b7391f44 957 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 958 return 1;
959}
960
dc0b027d 961static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 962{
dc0b027d 963 switch (fmode) {
e7616923
TM		 964 case FMODE_WRITE:
965 state->n_wronly++;
966 break;
967 case FMODE_READ:
968 state->n_rdonly++;
969 break;
970 case FMODE_READ|FMODE_WRITE:
971 state->n_rdwr++;
972 }
dc0b027d 973 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 974}
975
dc0b027d 976static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 977{
978 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 979 nfs4_stateid_copy(&state->stateid, stateid);
980 nfs4_stateid_copy(&state->open_stateid, stateid);
92b40e93 981 set_bit(NFS_OPEN_STATE, &state->flags);
dc0b027d 982 switch (fmode) {
003707c7
TM		 983 case FMODE_READ:
984 set_bit(NFS_O_RDONLY_STATE, &state->flags);
985 break;
986 case FMODE_WRITE:
987 set_bit(NFS_O_WRONLY_STATE, &state->flags);
988 break;
989 case FMODE_READ|FMODE_WRITE:
990 set_bit(NFS_O_RDWR_STATE, &state->flags);
991 }
e7616923
TM		 992}
993
dc0b027d 994static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 995{
8bda4e4c 996 write_seqlock(&state->seqlock);
dc0b027d 997 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 998 write_sequnlock(&state->seqlock);
003707c7
TM		 999}
1000
dc0b027d 1001static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1002{
8bda4e4c
TM		 1003 /*
1004 * Protect the call to nfs4_state_set_mode_locked and
1005 * serialise the stateid update
1006 */
1007 write_seqlock(&state->seqlock);
003707c7 1008 if (deleg_stateid != NULL) {
f597c537 1009 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1010 set_bit(NFS_DELEGATED_STATE, &state->flags);
1011 }
1012 if (open_stateid != NULL)
dc0b027d 1013 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1014 write_sequnlock(&state->seqlock);
1015 spin_lock(&state->owner->so_lock);
dc0b027d 1016 update_open_stateflags(state, fmode);
ec073428 1017 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1018}
1019
dc0b027d 1020static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1021{
1022 struct nfs_inode *nfsi = NFS_I(state->inode);
1023 struct nfs_delegation *deleg_cur;
1024 int ret = 0;
1025
dc0b027d 1026 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1027
1028 rcu_read_lock();
1029 deleg_cur = rcu_dereference(nfsi->delegation);
1030 if (deleg_cur == NULL)
1031 goto no_delegation;
1032
1033 spin_lock(&deleg_cur->lock);
1034 if (nfsi->delegation != deleg_cur ||
d25be546 1035 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1036 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1037 goto no_delegation_unlock;
1038
1039 if (delegation == NULL)
1040 delegation = &deleg_cur->stateid;
f597c537 1041 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1042 goto no_delegation_unlock;
1043
b7391f44 1044 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1045 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1046 ret = 1;
1047no_delegation_unlock:
1048 spin_unlock(&deleg_cur->lock);
1049no_delegation:
1050 rcu_read_unlock();
1051
1052 if (!ret && open_stateid != NULL) {
dc0b027d 1053 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1054 ret = 1;
1055 }
1056
1057 return ret;
1058}
1059
1060
dc0b027d 1061static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1062{
1063 struct nfs_delegation *delegation;
1064
1065 rcu_read_lock();
1066 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1067 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1068 rcu_read_unlock();
1069 return;
1070 }
1071 rcu_read_unlock();
57ec14c5 1072 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1073}
1074
6ee41268 1075static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1076{
1077 struct nfs4_state *state = opendata->state;
1078 struct nfs_inode *nfsi = NFS_I(state->inode);
1079 struct nfs_delegation *delegation;
536e43d1 1080 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1081 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1082 nfs4_stateid stateid;
1083 int ret = -EAGAIN;
1084
aac00a8d 1085 for (;;) {
dc0b027d 1086 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1087 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1088 if (can_open_cached(state, fmode, open_mode)) {
1089 update_open_stateflags(state, fmode);
6ee41268 1090 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1091 goto out_return_state;
1092 }
1093 spin_unlock(&state->owner->so_lock);
1094 }
34310430
TM		 1095 rcu_read_lock();
1096 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1097 if (!can_open_delegated(delegation, fmode)) {
34310430 1098 rcu_read_unlock();
aac00a8d 1099 break;
34310430 1100 }
aac00a8d 1101 /* Save the delegation */
f597c537 1102 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1103 rcu_read_unlock();
af22f94a 1104 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1105 if (ret != 0)
1106 goto out;
1107 ret = -EAGAIN;
34310430
TM		 1108
1109 /* Try to update the stateid using the delegation */
dc0b027d 1110 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1111 goto out_return_state;
aac00a8d 1112 }
aac00a8d
TM		 1113out:
1114 return ERR_PTR(ret);
1115out_return_state:
1116 atomic_inc(&state->count);
1117 return state;
1118}
1119
e23008ec
AA		 1120static void
1121nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1122{
1123 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1124 struct nfs_delegation *delegation;
1125 int delegation_flags = 0;
1126
1127 rcu_read_lock();
1128 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1129 if (delegation)
1130 delegation_flags = delegation->flags;
1131 rcu_read_unlock();
1132 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1133 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1134 "returning a delegation for "
1135 "OPEN(CLAIM_DELEGATE_CUR)\n",
1136 clp->cl_hostname);
1137 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1138 nfs_inode_set_delegation(state->inode,
1139 data->owner->so_cred,
1140 &data->o_res);
1141 else
1142 nfs_inode_reclaim_delegation(state->inode,
1143 data->owner->so_cred,
1144 &data->o_res);
1145}
1146
1147/*
1148 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1149 * and update the nfs4_state.
1150 */
1151static struct nfs4_state *
1152_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1153{
1154 struct inode *inode = data->state->inode;
1155 struct nfs4_state *state = data->state;
1156 int ret;
1157
1158 if (!data->rpc_done) {
1159 ret = data->rpc_status;
1160 goto err;
1161 }
1162
1163 ret = -ESTALE;
1164 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1165 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1166 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1167 goto err;
1168
1169 ret = -ENOMEM;
1170 state = nfs4_get_open_state(inode, data->owner);
1171 if (state == NULL)
1172 goto err;
1173
1174 ret = nfs_refresh_inode(inode, &data->f_attr);
1175 if (ret)
1176 goto err;
1177
1178 if (data->o_res.delegation_type != 0)
1179 nfs4_opendata_check_deleg(data, state);
1180 update_open_stateid(state, &data->o_res.stateid, NULL,
1181 data->o_arg.fmode);
1182
1183 return state;
1184err:
1185 return ERR_PTR(ret);
1186
1187}
1188
1189static struct nfs4_state *
1190_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1191{
1192 struct inode *inode;
1193 struct nfs4_state *state = NULL;
1b370bc2 1194 int ret;
24ac23ab 1195
aac00a8d 1196 if (!data->rpc_done) {
6ee41268 1197 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1198 goto out;
1199 }
1200
1b370bc2 1201 ret = -EAGAIN;
24ac23ab 1202 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1203 goto err;
24ac23ab 1204 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1205 ret = PTR_ERR(inode);
03f28e3a 1206 if (IS_ERR(inode))
1b370bc2
TM		 1207 goto err;
1208 ret = -ENOMEM;
24ac23ab
TM		 1209 state = nfs4_get_open_state(inode, data->owner);
1210 if (state == NULL)
1b370bc2 1211 goto err_put_inode;
e23008ec
AA		 1212 if (data->o_res.delegation_type != 0)
1213 nfs4_opendata_check_deleg(data, state);
34310430 1214 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1215 data->o_arg.fmode);
24ac23ab 1216 iput(inode);
aac00a8d 1217out:
7aa262b5 1218 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1219 return state;
1b370bc2
TM		 1220err_put_inode:
1221 iput(inode);
1222err:
1223 return ERR_PTR(ret);
24ac23ab
TM		 1224}
1225
e23008ec
AA		 1226static struct nfs4_state *
1227nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1228{
1229 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1230 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1231 return _nfs4_opendata_to_nfs4_state(data);
1232}
1233
864472e9
TM		 1234static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1235{
1236 struct nfs_inode *nfsi = NFS_I(state->inode);
1237 struct nfs_open_context *ctx;
1238
1239 spin_lock(&state->inode->i_lock);
1240 list_for_each_entry(ctx, &nfsi->open_files, list) {
1241 if (ctx->state != state)
1242 continue;
1243 get_nfs_open_context(ctx);
1244 spin_unlock(&state->inode->i_lock);
1245 return ctx;
1246 }
1247 spin_unlock(&state->inode->i_lock);
1248 return ERR_PTR(-ENOENT);
1249}
1250
4a1c0893
TM		 1251static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1252 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1253{
1254 struct nfs4_opendata *opendata;
1255
4a1c0893
TM		 1256 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1257 NULL, claim, GFP_NOFS);
6f220ed5
TM		 1258 if (opendata == NULL)
1259 return ERR_PTR(-ENOMEM);
1260 opendata->state = state;
1261 atomic_inc(&state->count);
1262 return opendata;
1263}
1264
dc0b027d 1265static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1266{
2ced46c2 1267 struct nfs4_state *newstate;
864472e9
TM		 1268 int ret;
1269
dc0b027d
TM		 1270 opendata->o_arg.open_flags = 0;
1271 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1272 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1273 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1274 nfs4_init_opendata_res(opendata);
b257957e 1275 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1276 if (ret != 0)
1277 return ret;
2ced46c2 1278 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1279 if (IS_ERR(newstate))
1280 return PTR_ERR(newstate);
643168c2 1281 nfs4_close_state(newstate, fmode);
2ced46c2 1282 *res = newstate;
864472e9
TM		 1283 return 0;
1284}
1285
1286static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1287{
864472e9 1288 struct nfs4_state *newstate;
864472e9
TM		 1289 int ret;
1290
1291 /* memory barrier prior to reading state->n_* */
2ced46c2 1292 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1293 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1294 smp_rmb();
1295 if (state->n_rdwr != 0) {
b0ed9dbc 1296 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1297 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1298 if (ret != 0)
1299 return ret;
2ced46c2
TM		 1300 if (newstate != state)
1301 return -ESTALE;
864472e9
TM		 1302 }
1303 if (state->n_wronly != 0) {
b0ed9dbc 1304 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1305 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1306 if (ret != 0)
1307 return ret;
2ced46c2
TM		 1308 if (newstate != state)
1309 return -ESTALE;
864472e9
TM		 1310 }
1311 if (state->n_rdonly != 0) {
b0ed9dbc 1312 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1313 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1314 if (ret != 0)
1315 return ret;
2ced46c2
TM		 1316 if (newstate != state)
1317 return -ESTALE;
864472e9 1318 }
1ac7e2fd
TM		 1319 /*
1320 * We may have performed cached opens for all three recoveries.
1321 * Check if we need to update the current stateid.
1322 */
1323 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1324 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1325 write_seqlock(&state->seqlock);
1ac7e2fd 1326 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1327 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1328 write_sequnlock(&state->seqlock);
1ac7e2fd 1329 }
864472e9
TM		 1330 return 0;
1331}
1332
1da177e4
LT		 1333/*
1334 * OPEN_RECLAIM:
1335 * reclaim state on the server after a reboot.
1da177e4 1336 */
539cd03a 1337static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1338{
1ac7e2fd 1339 struct nfs_delegation *delegation;
864472e9 1340 struct nfs4_opendata *opendata;
dc0b027d 1341 fmode_t delegation_type = 0;
1da177e4
LT		 1342 int status;
1343
4a1c0893
TM		 1344 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1345 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1346 if (IS_ERR(opendata))
1347 return PTR_ERR(opendata);
1ac7e2fd
TM		 1348 rcu_read_lock();
1349 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1350 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1351 delegation_type = delegation->type;
1ac7e2fd 1352 rcu_read_unlock();
864472e9
TM		 1353 opendata->o_arg.u.delegation_type = delegation_type;
1354 status = nfs4_open_recover(opendata, state);
c6d00e63 1355 nfs4_opendata_put(opendata);
1da177e4
LT		 1356 return status;
1357}
1358
539cd03a 1359static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1360{
1361 struct nfs_server *server = NFS_SERVER(state->inode);
1362 struct nfs4_exception exception = { };
1363 int err;
1364 do {
539cd03a 1365 err = _nfs4_do_open_reclaim(ctx, state);
49f9a0fa
TM		 1366 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1367 continue;
168667c4 1368 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1369 break;
1370 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1371 } while (exception.retry);
1372 return err;
1373}
1374
864472e9
TM		 1375static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1376{
1377 struct nfs_open_context *ctx;
1378 int ret;
1379
1380 ctx = nfs4_state_find_open_context(state);
1381 if (IS_ERR(ctx))
91876b13 1382 return -EAGAIN;
539cd03a 1383 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1384 put_nfs_open_context(ctx);
1385 return ret;
1386}
1387
db4f2e63 1388static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1389{
be76b5b6
TM		 1390 switch (err) {
1391 default:
1392 printk(KERN_ERR "NFS: %s: unhandled error "
1393 "%d.\n", __func__, err);
1394 case 0:
1395 case -ENOENT:
1396 case -ESTALE:
1397 break;
1398 case -NFS4ERR_BADSESSION:
1399 case -NFS4ERR_BADSLOT:
1400 case -NFS4ERR_BAD_HIGH_SLOT:
1401 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1402 case -NFS4ERR_DEADSESSION:
1403 set_bit(NFS_DELEGATED_STATE, &state->flags);
1404 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1405 return -EAGAIN;
1406 case -NFS4ERR_STALE_CLIENTID:
1407 case -NFS4ERR_STALE_STATEID:
1408 set_bit(NFS_DELEGATED_STATE, &state->flags);
1409 case -NFS4ERR_EXPIRED:
1410 /* Don't recall a delegation if it was lost */
1411 nfs4_schedule_lease_recovery(server->nfs_client);
1412 return -EAGAIN;
1413 case -NFS4ERR_DELEG_REVOKED:
1414 case -NFS4ERR_ADMIN_REVOKED:
1415 case -NFS4ERR_BAD_STATEID:
db4f2e63 1416 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1417 nfs_inode_find_state_and_recover(state->inode,
1418 stateid);
1419 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1420 return 0;
1421 case -NFS4ERR_DELAY:
1422 case -NFS4ERR_GRACE:
1423 set_bit(NFS_DELEGATED_STATE, &state->flags);
1424 ssleep(1);
1425 return -EAGAIN;
db4f2e63
TM		 1426 case -ENOMEM:
1427 case -NFS4ERR_DENIED:
1428 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1429 return 0;
be76b5b6 1430 }
1da177e4
LT		 1431 return err;
1432}
1433
db4f2e63
TM		 1434int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1435{
1436 struct nfs_server *server = NFS_SERVER(state->inode);
1437 struct nfs4_opendata *opendata;
1438 int err;
1439
1440 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1441 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1442 if (IS_ERR(opendata))
1443 return PTR_ERR(opendata);
1444 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1445 err = nfs4_open_recover(opendata, state);
1446 nfs4_opendata_put(opendata);
1447 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1448}
1449
cdd4e68b
TM		 1450static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1451{
1452 struct nfs4_opendata *data = calldata;
1453
1454 data->rpc_status = task->tk_status;
26e976a8 1455 if (data->rpc_status == 0) {
f597c537 1456 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1457 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1458 renew_lease(data->o_res.server, data->timestamp);
3e309914 1459 data->rpc_done = 1;
26e976a8 1460 }
cdd4e68b
TM		 1461}
1462
1463static void nfs4_open_confirm_release(void *calldata)
1464{
1465 struct nfs4_opendata *data = calldata;
1466 struct nfs4_state *state = NULL;
1467
1468 /* If this request hasn't been cancelled, do nothing */
1469 if (data->cancelled == 0)
1470 goto out_free;
1471 /* In case of error, no cleanup! */
3e309914 1472 if (!data->rpc_done)
cdd4e68b 1473 goto out_free;
cdd4e68b 1474 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1475 if (!IS_ERR(state))
643168c2 1476 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1477out_free:
c6d00e63 1478 nfs4_opendata_put(data);
cdd4e68b
TM		 1479}
1480
1481static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1482 .rpc_call_done = nfs4_open_confirm_done,
1483 .rpc_release = nfs4_open_confirm_release,
1484};
1485
1486/*
1487 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1488 */
1489static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1490{
1491 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1492 struct rpc_task *task;
5138fde0
TM		 1493 struct rpc_message msg = {
1494 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1495 .rpc_argp = &data->c_arg,
1496 .rpc_resp = &data->c_res,
1497 .rpc_cred = data->owner->so_cred,
1498 };
c970aa85
TM		 1499 struct rpc_task_setup task_setup_data = {
1500 .rpc_client = server->client,
5138fde0 1501 .rpc_message = &msg,
c970aa85
TM		 1502 .callback_ops = &nfs4_open_confirm_ops,
1503 .callback_data = data,
101070ca 1504 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1505 .flags = RPC_TASK_ASYNC,
1506 };
1da177e4
LT		 1507 int status;
1508
c6d00e63 1509 kref_get(&data->kref);
3e309914
TM		 1510 data->rpc_done = 0;
1511 data->rpc_status = 0;
5138fde0 1512 data->timestamp = jiffies;
c970aa85 1513 task = rpc_run_task(&task_setup_data);
7a1218a2 1514 if (IS_ERR(task))
cdd4e68b 1515 return PTR_ERR(task);
cdd4e68b
TM		 1516 status = nfs4_wait_for_completion_rpc_task(task);
1517 if (status != 0) {
1518 data->cancelled = 1;
1519 smp_wmb();
1520 } else
1521 status = data->rpc_status;
e6b3c4db 1522 rpc_put_task(task);
1da177e4
LT		 1523 return status;
1524}
1525
24ac23ab 1526static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1527{
24ac23ab
TM		 1528 struct nfs4_opendata *data = calldata;
1529 struct nfs4_state_owner *sp = data->owner;
549b19cc 1530 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1531
24ac23ab 1532 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1533 goto out_wait;
aac00a8d
TM		 1534 /*
1535 * Check if we still need to send an OPEN call, or if we can use
1536 * a delegation instead.
1537 */
1538 if (data->state != NULL) {
1539 struct nfs_delegation *delegation;
1540
dc0b027d 1541 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1542 goto out_no_action;
aac00a8d
TM		 1543 rcu_read_lock();
1544 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1545 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
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;
b257957e 1672 if (isrecover)
8fe72bac 1673 nfs4_set_sequence_privileged(&o_arg->seq_args);
c970aa85 1674 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1675 if (IS_ERR(task))
1676 return PTR_ERR(task);
1677 status = nfs4_wait_for_completion_rpc_task(task);
1678 if (status != 0) {
1679 data->cancelled = 1;
1680 smp_wmb();
1681 } else
1682 status = data->rpc_status;
1683 rpc_put_task(task);
1684
1685 return status;
1686}
1687
1688static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1689{
1690 struct inode *dir = data->dir->d_inode;
1691 struct nfs_openres *o_res = &data->o_res;
1692 int status;
1693
1694 status = nfs4_run_open_task(data, 1);
1695 if (status != 0 || !data->rpc_done)
1696 return status;
1697
6926afd1
TM		 1698 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1699
b257957e
AB		 1700 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1701 status = _nfs4_proc_open_confirm(data);
1702 if (status != 0)
1703 return status;
1704 }
1705
1706 return status;
1707}
1708
6168f62c
WAA		 1709static int nfs4_opendata_access(struct rpc_cred *cred,
1710 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1711 struct nfs4_state *state, fmode_t fmode,
1712 int openflags)
6168f62c
WAA		 1713{
1714 struct nfs_access_entry cache;
1715 u32 mask;
1716
1717 /* access call failed or for some reason the server doesn't
1718 * support any access modes -- defer access call until later */
1719 if (opendata->o_res.access_supported == 0)
1720 return 0;
1721
1722 mask = 0;
bbd3a8ee 1723 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1724 * write mode bits, but POSIX allows the creating process to write.
1725 * use openflags to check for exec, because fmode won't
1726 * always have FMODE_EXEC set when file open for exec. */
1727 if (openflags & __FMODE_EXEC) {
1728 /* ONLY check for exec rights */
1729 mask = MAY_EXEC;
1730 } else if (fmode & FMODE_READ)
1731 mask = MAY_READ;
6168f62c
WAA		 1732
1733 cache.cred = cred;
1734 cache.jiffies = jiffies;
1735 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1736 nfs_access_add_cache(state->inode, &cache);
1737
bbd3a8ee 1738 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1739 return 0;
1740
1741 /* even though OPEN succeeded, access is denied. Close the file */
1742 nfs4_close_state(state, fmode);
998f40b5 1743 return -EACCES;
6168f62c
WAA		 1744}
1745
b257957e
AB		 1746/*
1747 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1748 */
1749static int _nfs4_proc_open(struct nfs4_opendata *data)
1750{
1751 struct inode *dir = data->dir->d_inode;
1752 struct nfs_server *server = NFS_SERVER(dir);
1753 struct nfs_openargs *o_arg = &data->o_arg;
1754 struct nfs_openres *o_res = &data->o_res;
1755 int status;
1756
1757 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1758 if (!data->rpc_done)
1759 return status;
1760 if (status != 0) {
1761 if (status == -NFS4ERR_BADNAME &&
1762 !(o_arg->open_flags & O_CREAT))
1763 return -ENOENT;
24ac23ab 1764 return status;
08ef7bd3 1765 }
24ac23ab 1766
6926afd1
TM		 1767 nfs_fattr_map_and_free_names(server, &data->f_attr);
1768
90ff0c54 1769 if (o_arg->open_flags & O_CREAT)
56ae19f3 1770 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1771 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1772 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1773 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1774 status = _nfs4_proc_open_confirm(data);
1da177e4 1775 if (status != 0)
24ac23ab 1776 return status;
1da177e4
LT		 1777 }
1778 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1779 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1780 return 0;
1da177e4
LT		 1781}
1782
d83217c1
AA		 1783static int nfs4_recover_expired_lease(struct nfs_server *server)
1784{
1785 return nfs4_client_recover_expired_lease(server->nfs_client);
1786}
1787
1da177e4
LT		 1788/*
1789 * OPEN_EXPIRED:
1790 * reclaim state on the server after a network partition.
1791 * Assumes caller holds the appropriate lock
1792 */
539cd03a 1793static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1794{
e56e0b78 1795 struct nfs4_opendata *opendata;
864472e9 1796 int ret;
1da177e4 1797
4a1c0893 1798 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1799 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1800 if (IS_ERR(opendata))
1801 return PTR_ERR(opendata);
864472e9 1802 ret = nfs4_open_recover(opendata, state);
35d05778 1803 if (ret == -ESTALE)
3d4ff43d 1804 d_drop(ctx->dentry);
c6d00e63 1805 nfs4_opendata_put(opendata);
864472e9 1806 return ret;
1da177e4
LT		 1807}
1808
a9ed2e25 1809static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1810{
539cd03a 1811 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1812 struct nfs4_exception exception = { };
1813 int err;
1814
1815 do {
539cd03a 1816 err = _nfs4_open_expired(ctx, state);
49f9a0fa
TM		 1817 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1818 continue;
a9ed2e25
TM		 1819 switch (err) {
1820 default:
1821 goto out;
1822 case -NFS4ERR_GRACE:
1823 case -NFS4ERR_DELAY:
1824 nfs4_handle_exception(server, err, &exception);
1825 err = 0;
1826 }
202b50dc 1827 } while (exception.retry);
a9ed2e25 1828out:
202b50dc
TM		 1829 return err;
1830}
1831
1da177e4
LT		 1832static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1833{
1da177e4 1834 struct nfs_open_context *ctx;
864472e9 1835 int ret;
1da177e4 1836
864472e9
TM		 1837 ctx = nfs4_state_find_open_context(state);
1838 if (IS_ERR(ctx))
91876b13 1839 return -EAGAIN;
539cd03a 1840 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1841 put_nfs_open_context(ctx);
1842 return ret;
1da177e4
LT		 1843}
1844
f062eb6c 1845#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1846static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1847{
f062eb6c 1848 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1849 nfs4_stateid *stateid = &state->stateid;
1850 int status;
1851
1852 /* If a state reset has been done, test_stateid is unneeded */
1853 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1854 return;
1855
1856 status = nfs41_test_stateid(server, stateid);
1857 if (status != NFS_OK) {
1858 /* Free the stateid unless the server explicitly
1859 * informs us the stateid is unrecognized. */
1860 if (status != -NFS4ERR_BAD_STATEID)
1861 nfs41_free_stateid(server, stateid);
6938867e 1862 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1863
6938867e
BS		 1864 write_seqlock(&state->seqlock);
1865 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1866 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1867 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1868 }
1869}
1870
1871/**
1872 * nfs41_check_open_stateid - possibly free an open stateid
1873 *
1874 * @state: NFSv4 state for an inode
1875 *
1876 * Returns NFS_OK if recovery for this stateid is now finished.
1877 * Otherwise a negative NFS4ERR value is returned.
1878 */
1879static int nfs41_check_open_stateid(struct nfs4_state *state)
1880{
1881 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1882 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1883 int status;
1884
1885 /* If a state reset has been done, test_stateid is unneeded */
1886 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1887 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1888 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1889 return -NFS4ERR_BAD_STATEID;
1890
1891 status = nfs41_test_stateid(server, stateid);
1892 if (status != NFS_OK) {
1893 /* Free the stateid unless the server explicitly
1894 * informs us the stateid is unrecognized. */
1895 if (status != -NFS4ERR_BAD_STATEID)
1896 nfs41_free_stateid(server, stateid);
1897
1898 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1899 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1900 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 1901 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 1902 }
1903 return status;
1904}
1905
1906static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1907{
eb64cf96 1908 int status;
b01dd1d8 1909
3e60ffdd
CL		 1910 nfs41_clear_delegation_stateid(state);
1911 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1912 if (status != NFS_OK)
1913 status = nfs4_open_expired(sp, state);
1914 return status;
f062eb6c
BS		 1915}
1916#endif
1917
aa53ed54
JL		 1918/*
1919 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1920 * fields corresponding to attributes that were used to store the verifier.
1921 * Make sure we clobber those fields in the later setattr call
1922 */
1923static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1924{
1925 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1926 !(sattr->ia_valid & ATTR_ATIME_SET))
1927 sattr->ia_valid |= ATTR_ATIME;
1928
1929 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1930 !(sattr->ia_valid & ATTR_MTIME_SET))
1931 sattr->ia_valid |= ATTR_MTIME;
1932}
1933
c21443c2
TM		 1934static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1935 fmode_t fmode,
1936 int flags,
1937 struct nfs4_state **res)
1938{
1939 struct nfs4_state_owner *sp = opendata->owner;
1940 struct nfs_server *server = sp->so_server;
1941 struct nfs4_state *state;
1942 unsigned int seq;
1943 int ret;
1944
1945 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1946
1947 ret = _nfs4_proc_open(opendata);
1948 if (ret != 0)
1949 goto out;
1950
1951 state = nfs4_opendata_to_nfs4_state(opendata);
1952 ret = PTR_ERR(state);
1953 if (IS_ERR(state))
1954 goto out;
1955 if (server->caps & NFS_CAP_POSIX_LOCK)
1956 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1957
1958 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1959 if (ret != 0)
1960 goto out;
1961
91876b13 1962 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
c21443c2 1963 nfs4_schedule_stateid_recovery(server, state);
c21443c2
TM		 1964 *res = state;
1965out:
1966 return ret;
1967}
1968
1da177e4 1969/*
24ac23ab 1970 * Returns a referenced nfs4_state
1da177e4 1971 */
82be417a
AA		 1972static int _nfs4_do_open(struct inode *dir,
1973 struct dentry *dentry,
1974 fmode_t fmode,
1975 int flags,
1976 struct iattr *sattr,
1977 struct rpc_cred *cred,
1978 struct nfs4_state **res,
1979 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1980{
1981 struct nfs4_state_owner *sp;
1982 struct nfs4_state *state = NULL;
1983 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1984 struct nfs4_opendata *opendata;
49f9a0fa 1985 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
aac00a8d 1986 int status;
1da177e4
LT		 1987
1988 /* Protect against reboot recovery conflicts */
1da177e4 1989 status = -ENOMEM;
d1e284d5
TM		 1990 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1991 if (sp == NULL) {
1da177e4
LT		 1992 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1993 goto out_err;
1994 }
58d9714a
TM		 1995 status = nfs4_recover_expired_lease(server);
1996 if (status != 0)
b4454fe1 1997 goto err_put_state_owner;
82a2c1b7
AV		 1998 if (dentry->d_inode != NULL)
1999 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2000 status = -ENOMEM;
49f9a0fa
TM		 2001 if (dentry->d_inode)
2002 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2003 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
49f9a0fa 2004 claim, GFP_KERNEL);
e56e0b78 2005 if (opendata == NULL)
95d35cb4 2006 goto err_put_state_owner;
1da177e4 2007
82be417a
AA		 2008 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2009 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2010 if (!opendata->f_attr.mdsthreshold)
2011 goto err_opendata_put;
1549210f 2012 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2013 }
82a2c1b7
AV		 2014 if (dentry->d_inode != NULL)
2015 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2016
c21443c2 2017 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
6168f62c
WAA		 2018 if (status != 0)
2019 goto err_opendata_put;
2020
549b19cc
TM		 2021 if ((opendata->o_arg.open_flags & O_EXCL) &&
2022 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2023 nfs4_exclusive_attrset(opendata, sattr);
2024
2025 nfs_fattr_init(opendata->o_res.f_attr);
2026 status = nfs4_do_setattr(state->inode, cred,
2027 opendata->o_res.f_attr, sattr,
2028 state);
2029 if (status == 0)
2030 nfs_setattr_update_inode(state->inode, sattr);
2031 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2032 }
82be417a
AA		 2033
2034 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2035 *ctx_th = opendata->f_attr.mdsthreshold;
2036 else
2037 kfree(opendata->f_attr.mdsthreshold);
2038 opendata->f_attr.mdsthreshold = NULL;
2039
c6d00e63 2040 nfs4_opendata_put(opendata);
1da177e4 2041 nfs4_put_state_owner(sp);
1da177e4
LT		 2042 *res = state;
2043 return 0;
c6d00e63 2044err_opendata_put:
82be417a 2045 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2046 nfs4_opendata_put(opendata);
e56e0b78
TM		 2047err_put_state_owner:
2048 nfs4_put_state_owner(sp);
1da177e4 2049out_err:
1da177e4
LT		 2050 *res = NULL;
2051 return status;
2052}
2053
2054
82be417a
AA		 2055static struct nfs4_state *nfs4_do_open(struct inode *dir,
2056 struct dentry *dentry,
2057 fmode_t fmode,
2058 int flags,
2059 struct iattr *sattr,
2060 struct rpc_cred *cred,
2061 struct nfs4_threshold **ctx_th)
1da177e4 2062{
49f9a0fa 2063 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2064 struct nfs4_exception exception = { };
2065 struct nfs4_state *res;
2066 int status;
2067
6168f62c 2068 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 2069 do {
82be417a
AA		 2070 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
2071 &res, ctx_th);
1da177e4
LT		 2072 if (status == 0)
2073 break;
2074 /* NOTE: BAD_SEQID means the server and client disagree about the
2075 * book-keeping w.r.t. state-changing operations
2076 * (OPEN/CLOSE/LOCK/LOCKU...)
2077 * It is actually a sign of a bug on the client or on the server.
2078 *
2079 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2080 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2081 * have unhashed the old state_owner for us, and that we can
2082 * therefore safely retry using a new one. We should still warn
2083 * the user though...
2084 */
2085 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2086 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2087 " returned a bad sequence-id error!\n",
2088 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2089 exception.retry = 1;
2090 continue;
2091 }
550f5747
TM		 2092 /*
2093 * BAD_STATEID on OPEN means that the server cancelled our
2094 * state before it received the OPEN_CONFIRM.
2095 * Recover by retrying the request as per the discussion
2096 * on Page 181 of RFC3530.
2097 */
2098 if (status == -NFS4ERR_BAD_STATEID) {
2099 exception.retry = 1;
2100 continue;
2101 }
aac00a8d
TM		 2102 if (status == -EAGAIN) {
2103 /* We must have found a delegation */
2104 exception.retry = 1;
2105 continue;
2106 }
49f9a0fa
TM		 2107 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2108 continue;
2109 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2110 status, &exception));
2111 } while (exception.retry);
2112 return res;
2113}
2114
659bfcd6
TM		 2115static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2116 struct nfs_fattr *fattr, struct iattr *sattr,
2117 struct nfs4_state *state)
1da177e4 2118{
3e4f6290 2119 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2120 struct nfs_setattrargs arg = {
3e4f6290 2121 .fh = NFS_FH(inode),
1da177e4
LT		 2122 .iap = sattr,
2123 .server = server,
2124 .bitmask = server->attr_bitmask,
2125 };
2126 struct nfs_setattrres res = {
2127 .fattr = fattr,
2128 .server = server,
2129 };
2130 struct rpc_message msg = {
659bfcd6
TM		 2131 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2132 .rpc_argp = &arg,
2133 .rpc_resp = &res,
2134 .rpc_cred = cred,
1da177e4 2135 };
26e976a8 2136 unsigned long timestamp = jiffies;
65e4308d 2137 int status;
1da177e4 2138
0e574af1 2139 nfs_fattr_init(fattr);
1da177e4 2140
5d422301 2141 if (state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2142 struct nfs_lockowner lockowner = {
2143 .l_owner = current->files,
2144 .l_pid = current->tgid,
2145 };
4fc8796d 2146 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2147 &lockowner);
4fc8796d
TM		 2148 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2149 FMODE_WRITE)) {
3e4f6290 2150 /* Use that stateid */
08e9eac4 2151 } else
f597c537 2152 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2153
7c513058 2154 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2155 if (status == 0 && state != NULL)
2156 renew_lease(server, timestamp);
65e4308d 2157 return status;
1da177e4
LT		 2158}
2159
659bfcd6
TM		 2160static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2161 struct nfs_fattr *fattr, struct iattr *sattr,
2162 struct nfs4_state *state)
1da177e4 2163{
3e4f6290 2164 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2165 struct nfs4_exception exception = {
2166 .state = state,
3114ea7a 2167 .inode = inode,
a1d0b5ee 2168 };
1da177e4
LT		 2169 int err;
2170 do {
451146be
TM		 2171 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2172 switch (err) {
2173 case -NFS4ERR_OPENMODE:
2174 if (state && !(state->state & FMODE_WRITE)) {
2175 err = -EBADF;
2176 if (sattr->ia_valid & ATTR_OPEN)
2177 err = -EACCES;
2178 goto out;
2179 }
2180 }
2181 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2182 } while (exception.retry);
451146be 2183out:
1da177e4
LT		 2184 return err;
2185}
2186
2187struct nfs4_closedata {
2188 struct inode *inode;
2189 struct nfs4_state *state;
2190 struct nfs_closeargs arg;
2191 struct nfs_closeres res;
516a6af6 2192 struct nfs_fattr fattr;
26e976a8 2193 unsigned long timestamp;
f7e8917a
FI		 2194 bool roc;
2195 u32 roc_barrier;
1da177e4
LT		 2196};
2197
963d8fe5 2198static void nfs4_free_closedata(void *data)
9512135d 2199{
963d8fe5
TM		 2200 struct nfs4_closedata *calldata = data;
2201 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2202 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2203
f7e8917a
FI		 2204 if (calldata->roc)
2205 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2206 nfs4_put_open_state(calldata->state);
2207 nfs_free_seqid(calldata->arg.seqid);
9512135d 2208 nfs4_put_state_owner(sp);
322b2b90 2209 nfs_sb_deactive(sb);
9512135d
TM		 2210 kfree(calldata);
2211}
2212
88069f77
TM		 2213static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2214 fmode_t fmode)
2215{
2216 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2217 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2218 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2219 case FMODE_WRITE:
88069f77 2220 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2221 break;
2222 case FMODE_READ:
88069f77 2223 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2224 break;
2225 case 0:
2226 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2227 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2228 clear_bit(NFS_OPEN_STATE, &state->flags);
2229 }
88069f77
TM		 2230 spin_unlock(&state->owner->so_lock);
2231}
2232
963d8fe5 2233static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2234{
963d8fe5 2235 struct nfs4_closedata *calldata = data;
1da177e4 2236 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2237 struct nfs_server *server = NFS_SERVER(calldata->inode);
2238
a3ca5651 2239 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2240 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2241 return;
1da177e4
LT		 2242 /* hmm. we are done with the inode, and in the process of freeing
2243 * the state_owner. we keep this around to process errors
2244 */
1da177e4
LT		 2245 switch (task->tk_status) {
2246 case 0:
f7e8917a
FI		 2247 if (calldata->roc)
2248 pnfs_roc_set_barrier(state->inode,
2249 calldata->roc_barrier);
45328c35 2250 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2251 renew_lease(server, calldata->timestamp);
88069f77
TM		 2252 nfs4_close_clear_stateid_flags(state,
2253 calldata->arg.fmode);
1da177e4
LT		 2254 break;
2255 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2256 case -NFS4ERR_OLD_STATEID:
2257 case -NFS4ERR_BAD_STATEID:
1da177e4 2258 case -NFS4ERR_EXPIRED:
dc0b027d 2259 if (calldata->arg.fmode == 0)
9e33bed5 2260 break;
1da177e4 2261 default:
72211dbe
TM		 2262 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2263 rpc_restart_call_prepare(task);
1da177e4 2264 }
72211dbe 2265 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2266 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2267 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2268}
2269
4ce70ada 2270static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2271{
4ce70ada 2272 struct nfs4_closedata *calldata = data;
9512135d 2273 struct nfs4_state *state = calldata->state;
7fdab069 2274 struct inode *inode = calldata->inode;
88069f77 2275 int call_close = 0;
9512135d 2276
a3ca5651 2277 dprintk("%s: begin!\n", __func__);
963d8fe5 2278 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2279 goto out_wait;
003707c7 2280
88069f77
TM		 2281 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2282 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2283 spin_lock(&state->owner->so_lock);
003707c7 2284 /* Calculate the change in open mode */
e7616923 2285 if (state->n_rdwr == 0) {
003707c7 2286 if (state->n_rdonly == 0) {
88069f77
TM		 2287 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2288 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2289 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2290 }
2291 if (state->n_wronly == 0) {
88069f77
TM		 2292 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2293 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2294 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2295 }
e7616923 2296 }
5d422301
TM		 2297 if (!nfs4_valid_open_stateid(state))
2298 call_close = 0;
4cecb76f 2299 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2300
2301 if (!call_close) {
963d8fe5 2302 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2303 goto out_no_action;
9512135d 2304 }
88069f77 2305
f7e8917a 2306 if (calldata->arg.fmode == 0) {
88069f77 2307 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2308 if (calldata->roc &&
b9536ad5
AA		 2309 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2310 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2311 goto out_wait;
b9536ad5 2312 }
f7e8917a 2313 }
88069f77 2314
516a6af6 2315 nfs_fattr_init(calldata->res.fattr);
26e976a8 2316 calldata->timestamp = jiffies;
7fdab069 2317 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2318 &calldata->arg.seq_args,
2319 &calldata->res.seq_res,
2240a9e2
TM		 2320 task) != 0)
2321 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2322 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2323 return;
2324out_no_action:
2325 task->tk_action = NULL;
2326out_wait:
2327 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2328}
2329
963d8fe5 2330static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2331 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2332 .rpc_call_done = nfs4_close_done,
2333 .rpc_release = nfs4_free_closedata,
2334};
2335
1da177e4
LT		 2336/*
2337 * It is possible for data to be read/written from a mem-mapped file
2338 * after the sys_close call (which hits the vfs layer as a flush).
2339 * This means that we can't safely call nfsv4 close on a file until
2340 * the inode is cleared. This in turn means that we are not good
2341 * NFSv4 citizens - we do not indicate to the server to update the file's
2342 * share state even when we are done with one of the three share
2343 * stateid's in the inode.
2344 *
2345 * NOTE: Caller must be holding the sp->so_owner semaphore!
2346 */
1f7977c1 2347int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2348{
4a35bd41 2349 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2350 struct nfs4_closedata *calldata;
b39e625b
TM		 2351 struct nfs4_state_owner *sp = state->owner;
2352 struct rpc_task *task;
5138fde0
TM		 2353 struct rpc_message msg = {
2354 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2355 .rpc_cred = state->owner->so_cred,
2356 };
c970aa85
TM		 2357 struct rpc_task_setup task_setup_data = {
2358 .rpc_client = server->client,
5138fde0 2359 .rpc_message = &msg,
c970aa85 2360 .callback_ops = &nfs4_close_ops,
101070ca 2361 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2362 .flags = RPC_TASK_ASYNC,
2363 };
9512135d 2364 int status = -ENOMEM;
1da177e4 2365
8535b2be 2366 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2367 if (calldata == NULL)
9512135d 2368 goto out;
9d12b216 2369 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2370 calldata->inode = state->inode;
1da177e4 2371 calldata->state = state;
4a35bd41 2372 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2373 calldata->arg.stateid = &state->open_stateid;
1da177e4 2374 /* Serialization for the sequence id */
8535b2be 2375 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2376 if (calldata->arg.seqid == NULL)
2377 goto out_free_calldata;
dc0b027d 2378 calldata->arg.fmode = 0;
a65318bf 2379 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2380 calldata->res.fattr = &calldata->fattr;
c1d51931 2381 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2382 calldata->res.server = server;
1f7977c1 2383 calldata->roc = pnfs_roc(state->inode);
643168c2 2384 nfs_sb_active(calldata->inode->i_sb);
9512135d 2385
1174dd1f
TM		 2386 msg.rpc_argp = &calldata->arg;
2387 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2388 task_setup_data.callback_data = calldata;
2389 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2390 if (IS_ERR(task))
2391 return PTR_ERR(task);
a49c3c77
TM		 2392 status = 0;
2393 if (wait)
2394 status = rpc_wait_for_completion_task(task);
b39e625b 2395 rpc_put_task(task);
a49c3c77 2396 return status;
9512135d
TM		 2397out_free_calldata:
2398 kfree(calldata);
2399out:
b39e625b
TM		 2400 nfs4_put_open_state(state);
2401 nfs4_put_state_owner(sp);
9512135d 2402 return status;
1da177e4
LT		 2403}
2404
2b484297 2405static struct inode *
cd9a1c0e 2406nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2407{
1da177e4 2408 struct nfs4_state *state;
1da177e4 2409
565277f6 2410 /* Protect against concurrent sillydeletes */
82be417a
AA		 2411 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2412 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2413 if (IS_ERR(state))
2414 return ERR_CAST(state);
cd9a1c0e 2415 ctx->state = state;
f46e0bd3 2416 return igrab(state->inode);
1da177e4
LT		 2417}
2418
1185a552 2419static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2420{
2421 if (ctx->state == NULL)
2422 return;
2423 if (is_sync)
643168c2 2424 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2425 else
643168c2 2426 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2427}
1da177e4
LT		 2428
2429static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2430{
43652ad5
BH		 2431 struct nfs4_server_caps_arg args = {
2432 .fhandle = fhandle,
2433 };
1da177e4
LT		 2434 struct nfs4_server_caps_res res = {};
2435 struct rpc_message msg = {
2436 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2437 .rpc_argp = &args,
1da177e4
LT		 2438 .rpc_resp = &res,
2439 };
2440 int status;
2441
7c513058 2442 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2443 if (status == 0) {
2444 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2445 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2446 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2447 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2448 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2449 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2450 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2451 server->caps |= NFS_CAP_ACLS;
2452 if (res.has_links != 0)
2453 server->caps |= NFS_CAP_HARDLINKS;
2454 if (res.has_symlinks != 0)
2455 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2456 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2457 server->caps |= NFS_CAP_FILEID;
2458 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2459 server->caps |= NFS_CAP_MODE;
2460 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2461 server->caps |= NFS_CAP_NLINK;
2462 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2463 server->caps |= NFS_CAP_OWNER;
2464 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2465 server->caps |= NFS_CAP_OWNER_GROUP;
2466 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2467 server->caps |= NFS_CAP_ATIME;
2468 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2469 server->caps |= NFS_CAP_CTIME;
2470 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2471 server->caps |= NFS_CAP_MTIME;
2472
a65318bf
TM		 2473 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2474 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2475 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2476 server->acl_bitmask = res.acl_bitmask;
264e6351 2477 server->fh_expire_type = res.fh_expire_type;
1da177e4 2478 }
cccef3b9 2479
1da177e4
LT		 2480 return status;
2481}
2482
55a97593 2483int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2484{
2485 struct nfs4_exception exception = { };
2486 int err;
2487 do {
2488 err = nfs4_handle_exception(server,
2489 _nfs4_server_capabilities(server, fhandle),
2490 &exception);
2491 } while (exception.retry);
2492 return err;
2493}
2494
2495static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2496 struct nfs_fsinfo *info)
2497{
1da177e4
LT		 2498 struct nfs4_lookup_root_arg args = {
2499 .bitmask = nfs4_fattr_bitmap,
2500 };
2501 struct nfs4_lookup_res res = {
2502 .server = server,
0e574af1 2503 .fattr = info->fattr,
1da177e4
LT		 2504 .fh = fhandle,
2505 };
2506 struct rpc_message msg = {
2507 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2508 .rpc_argp = &args,
2509 .rpc_resp = &res,
2510 };
008f55d0 2511
0e574af1 2512 nfs_fattr_init(info->fattr);
7c513058 2513 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2514}
2515
2516static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2517 struct nfs_fsinfo *info)
2518{
2519 struct nfs4_exception exception = { };
2520 int err;
2521 do {
fb8a5ba8
BS		 2522 err = _nfs4_lookup_root(server, fhandle, info);
2523 switch (err) {
2524 case 0:
2525 case -NFS4ERR_WRONGSEC:
05e9cfb4 2526 goto out;
fb8a5ba8
BS		 2527 default:
2528 err = nfs4_handle_exception(server, err, &exception);
2529 }
1da177e4 2530 } while (exception.retry);
05e9cfb4 2531out:
1da177e4
LT		 2532 return err;
2533}
2534
8f70e95f
BS		 2535static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2536 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2537{
2538 struct rpc_auth *auth;
2539 int ret;
2540
2541 auth = rpcauth_create(flavor, server->client);
e8d920c5 2542 if (IS_ERR(auth)) {
8f70e95f
BS		 2543 ret = -EIO;
2544 goto out;
2545 }
2546 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2547out:
2548 return ret;
2549}
2550
801a16dc 2551static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2552 struct nfs_fsinfo *info)
1da177e4 2553{
8f70e95f 2554 int i, len, status = 0;
0fabee24 2555 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2556
6a1a1e34 2557 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
4ea8fed5
TM		 2558 if (len < 0)
2559 return len;
8f70e95f
BS		 2560
2561 for (i = 0; i < len; i++) {
6a1a1e34
CL		 2562 /* AUTH_UNIX is the default flavor if none was specified,
2563 * thus has already been tried. */
2564 if (flav_array[i] == RPC_AUTH_UNIX)
2565 continue;
2566
8f70e95f 2567 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2568 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2569 continue;
2570 break;
8f70e95f 2571 }
fb8a5ba8
BS		 2572 /*
2573 * -EACCESS could mean that the user doesn't have correct permissions
2574 * to access the mount. It could also mean that we tried to mount
2575 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2576 * existing mount programs don't handle -EACCES very well so it should
2577 * be mapped to -EPERM instead.
2578 */
2579 if (status == -EACCES)
2580 status = -EPERM;
801a16dc
BS		 2581 return status;
2582}
2583
2584/*
2585 * get the file handle for the "/" directory on the server
2586 */
3028eb2b
BS		 2587int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2588 struct nfs_fsinfo *info)
801a16dc 2589{
fca78d6d 2590 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2591 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2592 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2593 /*
2594 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2595 * by nfs4_map_errors() as this function exits.
2596 */
fca78d6d 2597 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2598 if (status == 0)
2599 status = nfs4_server_capabilities(server, fhandle);
2600 if (status == 0)
2601 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2602 return nfs4_map_errors(status);
1da177e4
LT		 2603}
2604
bae36241
BS		 2605static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2606 struct nfs_fsinfo *info)
2607{
2608 int error;
2609 struct nfs_fattr *fattr = info->fattr;
2610
2611 error = nfs4_server_capabilities(server, mntfh);
2612 if (error < 0) {
2613 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2614 return error;
2615 }
2616
2617 error = nfs4_proc_getattr(server, mntfh, fattr);
2618 if (error < 0) {
2619 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2620 return error;
2621 }
2622
2623 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2624 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2625 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2626
2627 return error;
2628}
2629
6b97fd3d
MN		 2630/*
2631 * Get locations and (maybe) other attributes of a referral.
2632 * Note that we'll actually follow the referral later when
2633 * we detect fsid mismatch in inode revalidation
2634 */
f05d147f
BS		 2635static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2636 const struct qstr *name, struct nfs_fattr *fattr,
2637 struct nfs_fh *fhandle)
6b97fd3d
MN		 2638{
2639 int status = -ENOMEM;
2640 struct page *page = NULL;
2641 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2642
2643 page = alloc_page(GFP_KERNEL);
2644 if (page == NULL)
2645 goto out;
2646 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2647 if (locations == NULL)
2648 goto out;
2649
f05d147f 2650 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2651 if (status != 0)
2652 goto out;
2653 /* Make sure server returned a different fsid for the referral */
2654 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2655 dprintk("%s: server did not return a different fsid for"
2656 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2657 status = -EIO;
2658 goto out;
2659 }
533eb461
AA		 2660 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2661 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2662
533eb461 2663 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2664 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2665 memset(fhandle, 0, sizeof(struct nfs_fh));
2666out:
2667 if (page)
2668 __free_page(page);
5d7ca35a 2669 kfree(locations);
6b97fd3d
MN		 2670 return status;
2671}
2672
1da177e4
LT		 2673static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2674{
2675 struct nfs4_getattr_arg args = {
2676 .fh = fhandle,
2677 .bitmask = server->attr_bitmask,
2678 };
2679 struct nfs4_getattr_res res = {
2680 .fattr = fattr,
2681 .server = server,
2682 };
2683 struct rpc_message msg = {
2684 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2685 .rpc_argp = &args,
2686 .rpc_resp = &res,
2687 };
2688
0e574af1 2689 nfs_fattr_init(fattr);
7c513058 2690 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2691}
2692
2693static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2694{
2695 struct nfs4_exception exception = { };
2696 int err;
2697 do {
2698 err = nfs4_handle_exception(server,
2699 _nfs4_proc_getattr(server, fhandle, fattr),
2700 &exception);
2701 } while (exception.retry);
2702 return err;
2703}
2704
2705/*
2706 * The file is not closed if it is opened due to the a request to change
2707 * the size of the file. The open call will not be needed once the
2708 * VFS layer lookup-intents are implemented.
2709 *
2710 * Close is called when the inode is destroyed.
2711 * If we haven't opened the file for O_WRONLY, we
2712 * need to in the size_change case to obtain a stateid.
2713 *
2714 * Got race?
2715 * Because OPEN is always done by name in nfsv4, it is
2716 * possible that we opened a different file by the same
2717 * name. We can recognize this race condition, but we
2718 * can't do anything about it besides returning an error.
2719 *
2720 * This will be fixed with VFS changes (lookup-intent).
2721 */
2722static int
2723nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2724 struct iattr *sattr)
2725{
08e9eac4 2726 struct inode *inode = dentry->d_inode;
659bfcd6 2727 struct rpc_cred *cred = NULL;
d530838b 2728 struct nfs4_state *state = NULL;
1da177e4
LT		 2729 int status;
2730
8a1636c4 2731 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2732 pnfs_commit_and_return_layout(inode);
8a1636c4 2733
0e574af1 2734 nfs_fattr_init(fattr);
1da177e4 2735
2669940d
AA		 2736 /* Deal with open(O_TRUNC) */
2737 if (sattr->ia_valid & ATTR_OPEN)
2738 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2739
2740 /* Optimization: if the end result is no change, don't RPC */
2741 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2742 return 0;
2743
d530838b 2744 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2745 if (sattr->ia_valid & ATTR_FILE) {
2746 struct nfs_open_context *ctx;
2747
2748 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2749 if (ctx) {
2750 cred = ctx->cred;
2751 state = ctx->state;
2752 }
659bfcd6 2753 }
08e9eac4 2754
659bfcd6 2755 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2756 if (status == 0)
2757 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2758 return status;
2759}
2760
0c2e53f1
TM		 2761static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2762 const struct qstr *name, struct nfs_fh *fhandle,
2763 struct nfs_fattr *fattr)
2b3de441 2764{
0c2e53f1 2765 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2766 int status;
2767 struct nfs4_lookup_arg args = {
2768 .bitmask = server->attr_bitmask,
0c2e53f1 2769 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2770 .name = name,
2771 };
2772 struct nfs4_lookup_res res = {
2773 .server = server,
2774 .fattr = fattr,
2775 .fh = fhandle,
2776 };
2777 struct rpc_message msg = {
2778 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2779 .rpc_argp = &args,
2780 .rpc_resp = &res,
2781 };
2782
2783 nfs_fattr_init(fattr);
2784
1da177e4 2785 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2786 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2787 dprintk("NFS reply lookup: %d\n", status);
2788 return status;
2789}
2790
72de53ec 2791static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2792{
7ebb9315 2793 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2794 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2795 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2796 fattr->nlink = 2;
2797}
2798
72de53ec
BS		 2799static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2800 struct qstr *name, struct nfs_fh *fhandle,
2801 struct nfs_fattr *fattr)
1da177e4
LT		 2802{
2803 struct nfs4_exception exception = { };
72de53ec 2804 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2805 int err;
2806 do {
72de53ec
BS		 2807 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2808 switch (err) {
08ef7bd3 2809 case -NFS4ERR_BADNAME:
72de53ec
BS		 2810 err = -ENOENT;
2811 goto out;
0c2e53f1 2812 case -NFS4ERR_MOVED:
f05d147f 2813 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2814 goto out;
0c2e53f1 2815 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2816 err = -EPERM;
2817 if (client != *clnt)
2818 goto out;
2819
2820 client = nfs4_create_sec_client(client, dir, name);
2821 if (IS_ERR(client))
2822 return PTR_ERR(client);
2823
2824 exception.retry = 1;
2825 break;
2826 default:
2827 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2828 }
1da177e4 2829 } while (exception.retry);
72de53ec
BS		 2830
2831out:
2832 if (err == 0)
2833 *clnt = client;
2834 else if (client != *clnt)
2835 rpc_shutdown_client(client);
2836
1da177e4
LT		 2837 return err;
2838}
2839
80a16b21 2840static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2841 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2842{
2843 int status;
2844 struct rpc_clnt *client = NFS_CLIENT(dir);
2845
2846 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2847 if (client != NFS_CLIENT(dir)) {
2848 rpc_shutdown_client(client);
2849 nfs_fixup_secinfo_attributes(fattr);
2850 }
2851 return status;
2852}
2853
f05d147f
BS		 2854struct rpc_clnt *
2855nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2856 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2857{
2858 int status;
2859 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2860
2861 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2862 if (status < 0) {
2863 rpc_shutdown_client(client);
2864 return ERR_PTR(status);
2865 }
2866 return client;
2867}
2868
1da177e4
LT		 2869static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2870{
76b32999 2871 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2872 struct nfs4_accessargs args = {
2873 .fh = NFS_FH(inode),
a4980e78 2874 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2875 };
2876 struct nfs4_accessres res = {
2877 .server = server,
1da177e4 2878 };
1da177e4
LT		 2879 struct rpc_message msg = {
2880 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2881 .rpc_argp = &args,
2882 .rpc_resp = &res,
2883 .rpc_cred = entry->cred,
2884 };
2885 int mode = entry->mask;
2886 int status;
2887
2888 /*
2889 * Determine which access bits we want to ask for...
2890 */
2891 if (mode & MAY_READ)
2892 args.access |= NFS4_ACCESS_READ;
2893 if (S_ISDIR(inode->i_mode)) {
2894 if (mode & MAY_WRITE)
2895 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2896 if (mode & MAY_EXEC)
2897 args.access |= NFS4_ACCESS_LOOKUP;
2898 } else {
2899 if (mode & MAY_WRITE)
2900 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2901 if (mode & MAY_EXEC)
2902 args.access |= NFS4_ACCESS_EXECUTE;
2903 }
c407d41a
TM		 2904
2905 res.fattr = nfs_alloc_fattr();
2906 if (res.fattr == NULL)
2907 return -ENOMEM;
2908
7c513058 2909 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2910 if (!status) {
6168f62c 2911 nfs_access_set_mask(entry, res.access);
c407d41a 2912 nfs_refresh_inode(inode, res.fattr);
1da177e4 2913 }
c407d41a 2914 nfs_free_fattr(res.fattr);
1da177e4
LT		 2915 return status;
2916}
2917
2918static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2919{
2920 struct nfs4_exception exception = { };
2921 int err;
2922 do {
2923 err = nfs4_handle_exception(NFS_SERVER(inode),
2924 _nfs4_proc_access(inode, entry),
2925 &exception);
2926 } while (exception.retry);
2927 return err;
2928}
2929
2930/*
2931 * TODO: For the time being, we don't try to get any attributes
2932 * along with any of the zero-copy operations READ, READDIR,
2933 * READLINK, WRITE.
2934 *
2935 * In the case of the first three, we want to put the GETATTR
2936 * after the read-type operation -- this is because it is hard
2937 * to predict the length of a GETATTR response in v4, and thus
2938 * align the READ data correctly. This means that the GETATTR
2939 * may end up partially falling into the page cache, and we should
2940 * shift it into the 'tail' of the xdr_buf before processing.
2941 * To do this efficiently, we need to know the total length
2942 * of data received, which doesn't seem to be available outside
2943 * of the RPC layer.
2944 *
2945 * In the case of WRITE, we also want to put the GETATTR after
2946 * the operation -- in this case because we want to make sure
140150db 2947 * we get the post-operation mtime and size.
1da177e4
LT		 2948 *
2949 * Both of these changes to the XDR layer would in fact be quite
2950 * minor, but I decided to leave them for a subsequent patch.
2951 */
2952static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2953 unsigned int pgbase, unsigned int pglen)
2954{
2955 struct nfs4_readlink args = {
2956 .fh = NFS_FH(inode),
2957 .pgbase = pgbase,
2958 .pglen = pglen,
2959 .pages = &page,
2960 };
f50c7000 2961 struct nfs4_readlink_res res;
1da177e4
LT		 2962 struct rpc_message msg = {
2963 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2964 .rpc_argp = &args,
f50c7000 2965 .rpc_resp = &res,
1da177e4
LT		 2966 };
2967
7c513058 2968 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2969}
2970
2971static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2972 unsigned int pgbase, unsigned int pglen)
2973{
2974 struct nfs4_exception exception = { };
2975 int err;
2976 do {
2977 err = nfs4_handle_exception(NFS_SERVER(inode),
2978 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2979 &exception);
2980 } while (exception.retry);
2981 return err;
2982}
2983
1da177e4 2984/*
8867fe58 2985 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2986 */
1da177e4
LT		 2987static int
2988nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2989 int flags)
1da177e4 2990{
8867fe58 2991 struct nfs_open_context *ctx;
1da177e4 2992 struct nfs4_state *state;
1da177e4
LT		 2993 int status = 0;
2994
8867fe58
MS		 2995 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2996 if (IS_ERR(ctx))
2997 return PTR_ERR(ctx);
2998
a8a5da99 2999 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 3000 state = nfs4_do_open(dir, dentry, ctx->mode,
3001 flags, sattr, ctx->cred,
3002 &ctx->mdsthreshold);
d4d9cdcb 3003 d_drop(dentry);
1da177e4
LT		 3004 if (IS_ERR(state)) {
3005 status = PTR_ERR(state);
c0204fd2 3006 goto out;
1da177e4 3007 }
d4d9cdcb 3008 d_add(dentry, igrab(state->inode));
d75340cc 3009 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 3010 ctx->state = state;
1da177e4 3011out:
8867fe58 3012 put_nfs_open_context(ctx);
1da177e4
LT		 3013 return status;
3014}
3015
3016static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3017{
16e42959 3018 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3019 struct nfs_removeargs args = {
1da177e4 3020 .fh = NFS_FH(dir),
26fe5750 3021 .name = *name,
16e42959 3022 };
4fdc17b2 3023 struct nfs_removeres res = {
16e42959 3024 .server = server,
1da177e4 3025 };
1da177e4 3026 struct rpc_message msg = {
4fdc17b2
TM		 3027 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3028 .rpc_argp = &args,
3029 .rpc_resp = &res,
1da177e4 3030 };
778d2817 3031 int status;
1da177e4 3032
7c513058 3033 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3034 if (status == 0)
16e42959 3035 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3036 return status;
3037}
3038
3039static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3040{
3041 struct nfs4_exception exception = { };
3042 int err;
3043 do {
3044 err = nfs4_handle_exception(NFS_SERVER(dir),
3045 _nfs4_proc_remove(dir, name),
3046 &exception);
3047 } while (exception.retry);
3048 return err;
3049}
3050
e4eff1a6 3051static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3052{
e4eff1a6
TM		 3053 struct nfs_server *server = NFS_SERVER(dir);
3054 struct nfs_removeargs *args = msg->rpc_argp;
3055 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3056
e4eff1a6 3057 res->server = server;
1da177e4 3058 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3059 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 3060}
3061
34e137cc
BS		 3062static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3063{
d9afbd1b
TM		 3064 nfs4_setup_sequence(NFS_SERVER(data->dir),
3065 &data->args.seq_args,
3066 &data->res.seq_res,
3067 task);
1da177e4
LT		 3068}
3069
e4eff1a6 3070static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3071{
e4eff1a6
TM		 3072 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3073
14516c3a
TM		 3074 if (!nfs4_sequence_done(task, &res->seq_res))
3075 return 0;
9e33bed5 3076 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3077 return 0;
3078 update_changeattr(dir, &res->cinfo);
e4eff1a6 3079 return 1;
1da177e4
LT		 3080}
3081
d3d4152a
JL		 3082static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3083{
3084 struct nfs_server *server = NFS_SERVER(dir);
3085 struct nfs_renameargs *arg = msg->rpc_argp;
3086 struct nfs_renameres *res = msg->rpc_resp;
3087
3088 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3089 res->server = server;
9d12b216 3090 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3091}
3092
c6bfa1a1
BS		 3093static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3094{
d9afbd1b
TM		 3095 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3096 &data->args.seq_args,
3097 &data->res.seq_res,
3098 task);
d3d4152a
JL		 3099}
3100
3101static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3102 struct inode *new_dir)
3103{
3104 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3105
3106 if (!nfs4_sequence_done(task, &res->seq_res))
3107 return 0;
3108 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3109 return 0;
3110
3111 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3112 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3113 return 1;
3114}
3115
1da177e4
LT		 3116static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3117 struct inode *new_dir, struct qstr *new_name)
3118{
6caf2c82 3119 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3120 struct nfs_renameargs arg = {
1da177e4
LT		 3121 .old_dir = NFS_FH(old_dir),
3122 .new_dir = NFS_FH(new_dir),
3123 .old_name = old_name,
3124 .new_name = new_name,
6caf2c82 3125 };
e8582a8b 3126 struct nfs_renameres res = {
6caf2c82 3127 .server = server,
1da177e4 3128 };
1da177e4
LT		 3129 struct rpc_message msg = {
3130 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3131 .rpc_argp = &arg,
3132 .rpc_resp = &res,
3133 };
011fff72 3134 int status = -ENOMEM;
1da177e4 3135
7c513058 3136 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3137 if (!status) {
3138 update_changeattr(old_dir, &res.old_cinfo);
3139 update_changeattr(new_dir, &res.new_cinfo);
3140 }
3141 return status;
3142}
3143
3144static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3145 struct inode *new_dir, struct qstr *new_name)
3146{
3147 struct nfs4_exception exception = { };
3148 int err;
3149 do {
3150 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3151 _nfs4_proc_rename(old_dir, old_name,
3152 new_dir, new_name),
3153 &exception);
3154 } while (exception.retry);
3155 return err;
3156}
3157
3158static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3159{
91ba2eee 3160 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3161 struct nfs4_link_arg arg = {
3162 .fh = NFS_FH(inode),
3163 .dir_fh = NFS_FH(dir),
3164 .name = name,
91ba2eee
TM		 3165 .bitmask = server->attr_bitmask,
3166 };
91ba2eee
TM		 3167 struct nfs4_link_res res = {
3168 .server = server,
1da177e4 3169 };
1da177e4
LT		 3170 struct rpc_message msg = {
3171 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3172 .rpc_argp = &arg,
91ba2eee 3173 .rpc_resp = &res,
1da177e4 3174 };
136f2627
TM		 3175 int status = -ENOMEM;
3176
3177 res.fattr = nfs_alloc_fattr();
778d2817 3178 if (res.fattr == NULL)
136f2627 3179 goto out;
1da177e4 3180
7c513058 3181 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3182 if (!status) {
3183 update_changeattr(dir, &res.cinfo);
73a3d07c 3184 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3185 }
136f2627 3186out:
136f2627 3187 nfs_free_fattr(res.fattr);
1da177e4
LT		 3188 return status;
3189}
3190
3191static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3192{
3193 struct nfs4_exception exception = { };
3194 int err;
3195 do {
3196 err = nfs4_handle_exception(NFS_SERVER(inode),
3197 _nfs4_proc_link(inode, dir, name),
3198 &exception);
3199 } while (exception.retry);
3200 return err;
3201}
3202
57dc9a57
TM		 3203struct nfs4_createdata {
3204 struct rpc_message msg;
3205 struct nfs4_create_arg arg;
3206 struct nfs4_create_res res;
3207 struct nfs_fh fh;
3208 struct nfs_fattr fattr;
57dc9a57
TM		 3209};
3210
3211static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3212 struct qstr *name, struct iattr *sattr, u32 ftype)
3213{
3214 struct nfs4_createdata *data;
3215
3216 data = kzalloc(sizeof(*data), GFP_KERNEL);
3217 if (data != NULL) {
3218 struct nfs_server *server = NFS_SERVER(dir);
3219
3220 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3221 data->msg.rpc_argp = &data->arg;
3222 data->msg.rpc_resp = &data->res;
3223 data->arg.dir_fh = NFS_FH(dir);
3224 data->arg.server = server;
3225 data->arg.name = name;
3226 data->arg.attrs = sattr;
3227 data->arg.ftype = ftype;
3228 data->arg.bitmask = server->attr_bitmask;
3229 data->res.server = server;
3230 data->res.fh = &data->fh;
3231 data->res.fattr = &data->fattr;
57dc9a57 3232 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3233 }
3234 return data;
3235}
3236
3237static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3238{
7c513058 3239 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3240 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3241 if (status == 0) {
3242 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3243 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3244 }
3245 return status;
3246}
3247
3248static void nfs4_free_createdata(struct nfs4_createdata *data)
3249{
3250 kfree(data);
3251}
3252
4f390c15 3253static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3254 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3255{
57dc9a57
TM		 3256 struct nfs4_createdata *data;
3257 int status = -ENAMETOOLONG;
1da177e4 3258
94a6d753 3259 if (len > NFS4_MAXPATHLEN)
57dc9a57 3260 goto out;
4f390c15 3261
57dc9a57
TM		 3262 status = -ENOMEM;
3263 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3264 if (data == NULL)
3265 goto out;
3266
3267 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3268 data->arg.u.symlink.pages = &page;
3269 data->arg.u.symlink.len = len;
1da177e4 3270
57dc9a57
TM		 3271 status = nfs4_do_create(dir, dentry, data);
3272
3273 nfs4_free_createdata(data);
3274out:
1da177e4
LT		 3275 return status;
3276}
3277
4f390c15 3278static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3279 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3280{
3281 struct nfs4_exception exception = { };
3282 int err;
3283 do {
3284 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3285 _nfs4_proc_symlink(dir, dentry, page,
3286 len, sattr),
1da177e4
LT		 3287 &exception);
3288 } while (exception.retry);
3289 return err;
3290}
3291
3292static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3293 struct iattr *sattr)
3294{
57dc9a57
TM		 3295 struct nfs4_createdata *data;
3296 int status = -ENOMEM;
1da177e4 3297
57dc9a57
TM		 3298 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3299 if (data == NULL)
3300 goto out;
3301
3302 status = nfs4_do_create(dir, dentry, data);
3303
3304 nfs4_free_createdata(data);
3305out:
1da177e4
LT		 3306 return status;
3307}
3308
3309static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3310 struct iattr *sattr)
3311{
3312 struct nfs4_exception exception = { };
3313 int err;
a8a5da99
AK		 3314
3315 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3316 do {
3317 err = nfs4_handle_exception(NFS_SERVER(dir),
3318 _nfs4_proc_mkdir(dir, dentry, sattr),
3319 &exception);
3320 } while (exception.retry);
3321 return err;
3322}
3323
3324static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3325 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3326{
3327 struct inode *dir = dentry->d_inode;
3328 struct nfs4_readdir_arg args = {
3329 .fh = NFS_FH(dir),
56e4ebf8 3330 .pages = pages,
1da177e4
LT		 3331 .pgbase = 0,
3332 .count = count,
96d25e53 3333 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3334 .plus = plus,
1da177e4
LT		 3335 };
3336 struct nfs4_readdir_res res;
3337 struct rpc_message msg = {
3338 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3339 .rpc_argp = &args,
3340 .rpc_resp = &res,
3341 .rpc_cred = cred,
3342 };
3343 int status;
3344
3110ff80 3345 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3346 dentry->d_parent->d_name.name,
3347 dentry->d_name.name,
3348 (unsigned long long)cookie);
c3f52af3 3349 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3350 res.pgbase = args.pgbase;
7c513058 3351 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3352 if (status >= 0) {
c3f52af3 3353 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3354 status += args.pgbase;
3355 }
c4812998
TM		 3356
3357 nfs_invalidate_atime(dir);
3358
3110ff80 3359 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3360 return status;
3361}
3362
3363static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3364 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3365{
3366 struct nfs4_exception exception = { };
3367 int err;
3368 do {
3369 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3370 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3371 pages, count, plus),
1da177e4
LT		 3372 &exception);
3373 } while (exception.retry);
3374 return err;
3375}
3376
3377static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3378 struct iattr *sattr, dev_t rdev)
3379{
57dc9a57
TM		 3380 struct nfs4_createdata *data;
3381 int mode = sattr->ia_mode;
3382 int status = -ENOMEM;
1da177e4 3383
57dc9a57
TM		 3384 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3385 if (data == NULL)
3386 goto out;
3387
1da177e4 3388 if (S_ISFIFO(mode))
57dc9a57 3389 data->arg.ftype = NF4FIFO;
1da177e4 3390 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3391 data->arg.ftype = NF4BLK;
3392 data->arg.u.device.specdata1 = MAJOR(rdev);
3393 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3394 }
3395 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3396 data->arg.ftype = NF4CHR;
3397 data->arg.u.device.specdata1 = MAJOR(rdev);
3398 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3399 } else if (!S_ISSOCK(mode)) {
3400 status = -EINVAL;
3401 goto out_free;
1da177e4 3402 }
1da177e4 3403
57dc9a57 3404 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3405out_free:
57dc9a57
TM		 3406 nfs4_free_createdata(data);
3407out:
1da177e4
LT		 3408 return status;
3409}
3410
3411static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3412 struct iattr *sattr, dev_t rdev)
3413{
3414 struct nfs4_exception exception = { };
3415 int err;
a8a5da99
AK		 3416
3417 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3418 do {
3419 err = nfs4_handle_exception(NFS_SERVER(dir),
3420 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3421 &exception);
3422 } while (exception.retry);
3423 return err;
3424}
3425
3426static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3427 struct nfs_fsstat *fsstat)
3428{
3429 struct nfs4_statfs_arg args = {
3430 .fh = fhandle,
3431 .bitmask = server->attr_bitmask,
3432 };
24ad148a
BH		 3433 struct nfs4_statfs_res res = {
3434 .fsstat = fsstat,
3435 };
1da177e4
LT		 3436 struct rpc_message msg = {
3437 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3438 .rpc_argp = &args,
24ad148a 3439 .rpc_resp = &res,
1da177e4
LT		 3440 };
3441
0e574af1 3442 nfs_fattr_init(fsstat->fattr);
7c513058 3443 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3444}
3445
3446static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3447{
3448 struct nfs4_exception exception = { };
3449 int err;
3450 do {
3451 err = nfs4_handle_exception(server,
3452 _nfs4_proc_statfs(server, fhandle, fsstat),
3453 &exception);
3454 } while (exception.retry);
3455 return err;
3456}
3457
3458static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3459 struct nfs_fsinfo *fsinfo)
3460{
3461 struct nfs4_fsinfo_arg args = {
3462 .fh = fhandle,
3463 .bitmask = server->attr_bitmask,
3464 };
3dda5e43
BH		 3465 struct nfs4_fsinfo_res res = {
3466 .fsinfo = fsinfo,
3467 };
1da177e4
LT		 3468 struct rpc_message msg = {
3469 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3470 .rpc_argp = &args,
3dda5e43 3471 .rpc_resp = &res,
1da177e4
LT		 3472 };
3473
7c513058 3474 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3475}
3476
3477static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3478{
3479 struct nfs4_exception exception = { };
3480 int err;
3481
3482 do {
3483 err = nfs4_handle_exception(server,
3484 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3485 &exception);
3486 } while (exception.retry);
3487 return err;
3488}
3489
3490static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3491{
e38eb650
BS		 3492 int error;
3493
0e574af1 3494 nfs_fattr_init(fsinfo->fattr);
e38eb650 3495 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3496 if (error == 0) {
3497 /* block layout checks this! */
3498 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3499 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3500 }
e38eb650
BS		 3501
3502 return error;
1da177e4
LT		 3503}
3504
3505static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3506 struct nfs_pathconf *pathconf)
3507{
3508 struct nfs4_pathconf_arg args = {
3509 .fh = fhandle,
3510 .bitmask = server->attr_bitmask,
3511 };
d45b2989
BH		 3512 struct nfs4_pathconf_res res = {
3513 .pathconf = pathconf,
3514 };
1da177e4
LT		 3515 struct rpc_message msg = {
3516 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3517 .rpc_argp = &args,
d45b2989 3518 .rpc_resp = &res,
1da177e4
LT		 3519 };
3520
3521 /* None of the pathconf attributes are mandatory to implement */
3522 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3523 memset(pathconf, 0, sizeof(*pathconf));
3524 return 0;
3525 }
3526
0e574af1 3527 nfs_fattr_init(pathconf->fattr);
7c513058 3528 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3529}
3530
3531static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3532 struct nfs_pathconf *pathconf)
3533{
3534 struct nfs4_exception exception = { };
3535 int err;
3536
3537 do {
3538 err = nfs4_handle_exception(server,
3539 _nfs4_proc_pathconf(server, fhandle, pathconf),
3540 &exception);
3541 } while (exception.retry);
3542 return err;
3543}
3544
5521abfd 3545int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3546 const struct nfs_open_context *ctx,
3547 const struct nfs_lock_context *l_ctx,
3548 fmode_t fmode)
3549{
3550 const struct nfs_lockowner *lockowner = NULL;
3551
3552 if (l_ctx != NULL)
3553 lockowner = &l_ctx->lockowner;
5521abfd 3554 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3555}
3556EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3557
5521abfd
TM		 3558static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3559 const struct nfs_open_context *ctx,
3560 const struct nfs_lock_context *l_ctx,
3561 fmode_t fmode)
3562{
3563 nfs4_stateid current_stateid;
3564
3565 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3566 return false;
3567 return nfs4_stateid_match(stateid, &current_stateid);
3568}
3569
3570static bool nfs4_error_stateid_expired(int err)
3571{
3572 switch (err) {
3573 case -NFS4ERR_DELEG_REVOKED:
3574 case -NFS4ERR_ADMIN_REVOKED:
3575 case -NFS4ERR_BAD_STATEID:
3576 case -NFS4ERR_STALE_STATEID:
3577 case -NFS4ERR_OLD_STATEID:
3578 case -NFS4ERR_OPENMODE:
3579 case -NFS4ERR_EXPIRED:
3580 return true;
3581 }
3582 return false;
3583}
3584
d20581aa
BH		 3585void __nfs4_read_done_cb(struct nfs_read_data *data)
3586{
cd841605 3587 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3588}
3589
cbdabc7f 3590static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3591{
cd841605 3592 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3593
9e33bed5 3594 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3595 rpc_restart_call_prepare(task);
ec06c096 3596 return -EAGAIN;
1da177e4 3597 }
8850df99 3598
d20581aa 3599 __nfs4_read_done_cb(data);
1da177e4 3600 if (task->tk_status > 0)
ec06c096
TM		 3601 renew_lease(server, data->timestamp);
3602 return 0;
1da177e4
LT		 3603}
3604
5521abfd
TM		 3605static bool nfs4_read_stateid_changed(struct rpc_task *task,
3606 struct nfs_readargs *args)
3607{
3608
3609 if (!nfs4_error_stateid_expired(task->tk_status) ||
3610 nfs4_stateid_is_current(&args->stateid,
3611 args->context,
3612 args->lock_context,
3613 FMODE_READ))
3614 return false;
3615 rpc_restart_call_prepare(task);
3616 return true;
3617}
3618
cbdabc7f
AA		 3619static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3620{
3621
3622 dprintk("--> %s\n", __func__);
3623
3624 if (!nfs4_sequence_done(task, &data->res.seq_res))
3625 return -EAGAIN;
5521abfd
TM		 3626 if (nfs4_read_stateid_changed(task, &data->args))
3627 return -EAGAIN;
d20581aa
BH		 3628 return data->read_done_cb ? data->read_done_cb(task, data) :
3629 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3630}
3631
bdc7f021 3632static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3633{
1da177e4 3634 data->timestamp = jiffies;
cbdabc7f 3635 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3636 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3637 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3638}
3639
ea7c3303
BS		 3640static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3641{
9b206149 3642 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3643 &data->args.seq_args,
3644 &data->res.seq_res,
9b206149
TM		 3645 task))
3646 return;
3647 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3648 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3649}
3650
b029bc9b 3651static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3652{
cd841605 3653 struct inode *inode = data->header->inode;
1da177e4 3654
9e33bed5 3655 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3656 rpc_restart_call_prepare(task);
788e7a89 3657 return -EAGAIN;
1da177e4 3658 }
4f9838c7 3659 if (task->tk_status >= 0) {
1da177e4 3660 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3661 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3662 }
788e7a89 3663 return 0;
1da177e4
LT		 3664}
3665
5521abfd
TM		 3666static bool nfs4_write_stateid_changed(struct rpc_task *task,
3667 struct nfs_writeargs *args)
3668{
3669
3670 if (!nfs4_error_stateid_expired(task->tk_status) ||
3671 nfs4_stateid_is_current(&args->stateid,
3672 args->context,
3673 args->lock_context,
3674 FMODE_WRITE))
3675 return false;
3676 rpc_restart_call_prepare(task);
3677 return true;
3678}
3679
b029bc9b
FI		 3680static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3681{
3682 if (!nfs4_sequence_done(task, &data->res.seq_res))
3683 return -EAGAIN;
5521abfd
TM		 3684 if (nfs4_write_stateid_changed(task, &data->args))
3685 return -EAGAIN;
d20581aa
BH		 3686 return data->write_done_cb ? data->write_done_cb(task, data) :
3687 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3688}
3689
5a37f851
TM		 3690static
3691bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3692{
5a37f851
TM		 3693 const struct nfs_pgio_header *hdr = data->header;
3694
3695 /* Don't request attributes for pNFS or O_DIRECT writes */
3696 if (data->ds_clp != NULL || hdr->dreq != NULL)
3697 return false;
3698 /* Otherwise, request attributes if and only if we don't hold
3699 * a delegation
3700 */
011e2a7f 3701 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3702}
a69aef14 3703
bdc7f021 3704static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3705{
cd841605 3706 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3707
5a37f851 3708 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3709 data->args.bitmask = NULL;
3710 data->res.fattr = NULL;
3711 } else
3712 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3713
b029bc9b
FI		 3714 if (!data->write_done_cb)
3715 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3716 data->res.server = server;
1da177e4
LT		 3717 data->timestamp = jiffies;
3718
bdc7f021 3719 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3720 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3721}
3722
c6cb80d0
BS		 3723static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3724{
9b206149 3725 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3726 &data->args.seq_args,
3727 &data->res.seq_res,
9b206149
TM		 3728 task))
3729 return;
3730 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3731 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 3732}
3733
0b7c0153 3734static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3735{
d9afbd1b
TM		 3736 nfs4_setup_sequence(NFS_SERVER(data->inode),
3737 &data->args.seq_args,
3738 &data->res.seq_res,
3739 task);
1da177e4
LT		 3740}
3741
0b7c0153 3742static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3743{
1da177e4 3744 struct inode *inode = data->inode;
14516c3a 3745
9e33bed5 3746 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3747 rpc_restart_call_prepare(task);
788e7a89 3748 return -EAGAIN;
1da177e4 3749 }
788e7a89 3750 return 0;
1da177e4
LT		 3751}
3752
0b7c0153 3753static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3754{
3755 if (!nfs4_sequence_done(task, &data->res.seq_res))
3756 return -EAGAIN;
0b7c0153 3757 return data->commit_done_cb(task, data);
5f452431
FI		 3758}
3759
0b7c0153 3760static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3761{
788e7a89 3762 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3763
0b7c0153
FI		 3764 if (data->commit_done_cb == NULL)
3765 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3766 data->res.server = server;
bdc7f021 3767 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3768 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3769}
3770
9bc4e3ca
CL		 3771struct nfs4_renewdata {
3772 struct nfs_client *client;
3773 unsigned long timestamp;
3774};
3775
1da177e4
LT		 3776/*
3777 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3778 * standalone procedure for queueing an asynchronous RENEW.
3779 */
9bc4e3ca 3780static void nfs4_renew_release(void *calldata)
dc96aef9 3781{
9bc4e3ca
CL		 3782 struct nfs4_renewdata *data = calldata;
3783 struct nfs_client *clp = data->client;
dc96aef9 3784
0851de06
AB		 3785 if (atomic_read(&clp->cl_count) > 1)
3786 nfs4_schedule_state_renewal(clp);
3787 nfs_put_client(clp);
9bc4e3ca 3788 kfree(data);
dc96aef9
AB		 3789}
3790
9bc4e3ca 3791static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3792{
9bc4e3ca
CL		 3793 struct nfs4_renewdata *data = calldata;
3794 struct nfs_client *clp = data->client;
3795 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3796
3797 if (task->tk_status < 0) {
95baa25c 3798 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3799 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3800 return;
3801 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3802 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3803 return;
3804 }
3805 nfs4_schedule_path_down_recovery(clp);
1da177e4 3806 }
452e9352 3807 do_renew_lease(clp, timestamp);
1da177e4
LT		 3808}
3809
963d8fe5
TM		 3810static const struct rpc_call_ops nfs4_renew_ops = {
3811 .rpc_call_done = nfs4_renew_done,
dc96aef9 3812 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3813};
3814
2f60ea6b 3815static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3816{
3817 struct rpc_message msg = {
3818 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3819 .rpc_argp = clp,
b4454fe1 3820 .rpc_cred = cred,
1da177e4 3821 };
9bc4e3ca 3822 struct nfs4_renewdata *data;
1da177e4 3823
2f60ea6b
TM		 3824 if (renew_flags == 0)
3825 return 0;
0851de06
AB		 3826 if (!atomic_inc_not_zero(&clp->cl_count))
3827 return -EIO;
b569ad34 3828 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3829 if (data == NULL)
3830 return -ENOMEM;
3831 data->client = clp;
3832 data->timestamp = jiffies;
bc7a05ca 3833 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 3834 &nfs4_renew_ops, data);
1da177e4
LT		 3835}
3836
8534d4ec 3837static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3838{
3839 struct rpc_message msg = {
3840 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3841 .rpc_argp = clp,
b4454fe1 3842 .rpc_cred = cred,
1da177e4
LT		 3843 };
3844 unsigned long now = jiffies;
3845 int status;
3846
bc7a05ca 3847 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3848 if (status < 0)
3849 return status;
452e9352 3850 do_renew_lease(clp, now);
1da177e4
LT		 3851 return 0;
3852}
3853
aa1870af
BF		 3854static inline int nfs4_server_supports_acls(struct nfs_server *server)
3855{
3856 return (server->caps & NFS_CAP_ACLS)
3857 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3858 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3859}
3860
21f498c2
TM		 3861/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3862 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3863 * the stack.
3864 */
21f498c2 3865#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3866
e9e3d724
NH		 3867static int buf_to_pages_noslab(const void *buf, size_t buflen,
3868 struct page **pages, unsigned int *pgbase)
3869{
3870 struct page *newpage, **spages;
3871 int rc = 0;
3872 size_t len;
3873 spages = pages;
3874
3875 do {
21f498c2 3876 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3877 newpage = alloc_page(GFP_KERNEL);
3878
3879 if (newpage == NULL)
3880 goto unwind;
3881 memcpy(page_address(newpage), buf, len);
3882 buf += len;
3883 buflen -= len;
3884 *pages++ = newpage;
3885 rc++;
3886 } while (buflen != 0);
3887
3888 return rc;
3889
3890unwind:
3891 for(; rc > 0; rc--)
3892 __free_page(spages[rc-1]);
3893 return -ENOMEM;
3894}
3895
e50a1c2e
BF		 3896struct nfs4_cached_acl {
3897 int cached;
3898 size_t len;
3e9d4154 3899 char data[0];
e50a1c2e
BF		 3900};
3901
3902static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3903{
3904 struct nfs_inode *nfsi = NFS_I(inode);
3905
3906 spin_lock(&inode->i_lock);
3907 kfree(nfsi->nfs4_acl);
3908 nfsi->nfs4_acl = acl;
3909 spin_unlock(&inode->i_lock);
3910}
3911
3912static void nfs4_zap_acl_attr(struct inode *inode)
3913{
3914 nfs4_set_cached_acl(inode, NULL);
3915}
3916
3917static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3918{
3919 struct nfs_inode *nfsi = NFS_I(inode);
3920 struct nfs4_cached_acl *acl;
3921 int ret = -ENOENT;
3922
3923 spin_lock(&inode->i_lock);
3924 acl = nfsi->nfs4_acl;
3925 if (acl == NULL)
3926 goto out;
3927 if (buf == NULL) /* user is just asking for length */
3928 goto out_len;
3929 if (acl->cached == 0)
3930 goto out;
3931 ret = -ERANGE; /* see getxattr(2) man page */
3932 if (acl->len > buflen)
3933 goto out;
3934 memcpy(buf, acl->data, acl->len);
3935out_len:
3936 ret = acl->len;
3937out:
3938 spin_unlock(&inode->i_lock);
3939 return ret;
3940}
3941
5794d21e 3942static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3943{
3944 struct nfs4_cached_acl *acl;
b291f1b1 3945 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3946
1f1ea6c2 3947 if (buflen <= PAGE_SIZE) {
b291f1b1 3948 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3949 if (acl == NULL)
3950 goto out;
3951 acl->cached = 1;
5794d21e 3952 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3953 } else {
3954 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3955 if (acl == NULL)
3956 goto out;
3957 acl->cached = 0;
3958 }
3959 acl->len = acl_len;
3960out:
3961 nfs4_set_cached_acl(inode, acl);
3962}
3963
bf118a34
AA		 3964/*
3965 * The getxattr API returns the required buffer length when called with a
3966 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3967 * the required buf. On a NULL buf, we send a page of data to the server
3968 * guessing that the ACL request can be serviced by a page. If so, we cache
3969 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3970 * the cache. If not so, we throw away the page, and cache the required
3971 * length. The next getxattr call will then produce another round trip to
3972 * the server, this time with the input buf of the required size.
3973 */
16b4289c 3974static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3975{
bf118a34 3976 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3977 struct nfs_getaclargs args = {
3978 .fh = NFS_FH(inode),
3979 .acl_pages = pages,
3980 .acl_len = buflen,
3981 };
663c79b3
BH		 3982 struct nfs_getaclres res = {
3983 .acl_len = buflen,
3984 };
aa1870af
BF		 3985 struct rpc_message msg = {
3986 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3987 .rpc_argp = &args,
663c79b3 3988 .rpc_resp = &res,
aa1870af 3989 };
21f498c2
TM		 3990 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3991 int ret = -ENOMEM, i;
aa1870af 3992
bf118a34
AA		 3993 /* As long as we're doing a round trip to the server anyway,
3994 * let's be prepared for a page of acl data. */
3995 if (npages == 0)
3996 npages = 1;
21f498c2
TM		 3997 if (npages > ARRAY_SIZE(pages))
3998 return -ERANGE;
5a006899 3999
bf118a34
AA		 4000 for (i = 0; i < npages; i++) {
4001 pages[i] = alloc_page(GFP_KERNEL);
4002 if (!pages[i])
4003 goto out_free;
e50a1c2e 4004 }
5a006899
SP		 4005
4006 /* for decoding across pages */
4007 res.acl_scratch = alloc_page(GFP_KERNEL);
4008 if (!res.acl_scratch)
4009 goto out_free;
4010
bf118a34
AA		 4011 args.acl_len = npages * PAGE_SIZE;
4012 args.acl_pgbase = 0;
5a006899 4013
de040bec 4014 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4015 __func__, buf, buflen, npages, args.acl_len);
4016 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4017 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4018 if (ret)
4019 goto out_free;
bf118a34 4020
1f1ea6c2
TM		 4021 /* Handle the case where the passed-in buffer is too short */
4022 if (res.acl_flags & NFS4_ACL_TRUNC) {
4023 /* Did the user only issue a request for the acl length? */
4024 if (buf == NULL)
4025 goto out_ok;
e50a1c2e 4026 ret = -ERANGE;
1f1ea6c2 4027 goto out_free;
e50a1c2e 4028 }
1f1ea6c2 4029 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4030 if (buf) {
4031 if (res.acl_len > buflen) {
4032 ret = -ERANGE;
4033 goto out_free;
4034 }
1f1ea6c2 4035 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4036 }
1f1ea6c2
TM		 4037out_ok:
4038 ret = res.acl_len;
e50a1c2e 4039out_free:
bf118a34
AA		 4040 for (i = 0; i < npages; i++)
4041 if (pages[i])
4042 __free_page(pages[i]);
331818f1
TM		 4043 if (res.acl_scratch)
4044 __free_page(res.acl_scratch);
aa1870af
BF		 4045 return ret;
4046}
4047
16b4289c
TM		 4048static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4049{
4050 struct nfs4_exception exception = { };
4051 ssize_t ret;
4052 do {
4053 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4054 if (ret >= 0)
4055 break;
4056 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4057 } while (exception.retry);
4058 return ret;
4059}
4060
e50a1c2e
BF		 4061static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4062{
4063 struct nfs_server *server = NFS_SERVER(inode);
4064 int ret;
4065
4066 if (!nfs4_server_supports_acls(server))
4067 return -EOPNOTSUPP;
4068 ret = nfs_revalidate_inode(server, inode);
4069 if (ret < 0)
4070 return ret;
08a22b39
AK		 4071 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4072 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4073 ret = nfs4_read_cached_acl(inode, buf, buflen);
4074 if (ret != -ENOENT)
bf118a34
AA		 4075 /* -ENOENT is returned if there is no ACL or if there is an ACL
4076 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4077 return ret;
4078 return nfs4_get_acl_uncached(inode, buf, buflen);
4079}
4080
16b4289c 4081static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4082{
4083 struct nfs_server *server = NFS_SERVER(inode);
4084 struct page *pages[NFS4ACL_MAXPAGES];
4085 struct nfs_setaclargs arg = {
4086 .fh = NFS_FH(inode),
4087 .acl_pages = pages,
4088 .acl_len = buflen,
4089 };
73c403a9 4090 struct nfs_setaclres res;
4b580ee3
BF		 4091 struct rpc_message msg = {
4092 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4093 .rpc_argp = &arg,
73c403a9 4094 .rpc_resp = &res,
4b580ee3 4095 };
21f498c2 4096 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4097 int ret, i;
4b580ee3
BF		 4098
4099 if (!nfs4_server_supports_acls(server))
4100 return -EOPNOTSUPP;
21f498c2
TM		 4101 if (npages > ARRAY_SIZE(pages))
4102 return -ERANGE;
e9e3d724
NH		 4103 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4104 if (i < 0)
4105 return i;
57ec14c5 4106 nfs4_inode_return_delegation(inode);
7c513058 4107 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4108
4109 /*
4110 * Free each page after tx, so the only ref left is
4111 * held by the network stack
4112 */
4113 for (; i > 0; i--)
4114 put_page(pages[i-1]);
4115
08a22b39
AK		 4116 /*
4117 * Acl update can result in inode attribute update.
4118 * so mark the attribute cache invalid.
4119 */
4120 spin_lock(&inode->i_lock);
4121 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4122 spin_unlock(&inode->i_lock);
f41f7418
TM		 4123 nfs_access_zap_cache(inode);
4124 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4125 return ret;
4126}
4127
16b4289c
TM		 4128static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4129{
4130 struct nfs4_exception exception = { };
4131 int err;
4132 do {
4133 err = nfs4_handle_exception(NFS_SERVER(inode),
4134 __nfs4_proc_set_acl(inode, buf, buflen),
4135 &exception);
4136 } while (exception.retry);
4137 return err;
4138}
4139
1da177e4 4140static int
aa5190d0 4141nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4142{
aa5190d0
TM		 4143 struct nfs_client *clp = server->nfs_client;
4144
4145 if (task->tk_status >= 0)
1da177e4
LT		 4146 return 0;
4147 switch(task->tk_status) {
a1d0b5ee 4148 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4149 case -NFS4ERR_ADMIN_REVOKED:
4150 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4151 if (state == NULL)
4152 break;
4153 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4154 case -NFS4ERR_OPENMODE:
4155 if (state == NULL)
4156 break;
5d422301
TM		 4157 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4158 goto stateid_invalid;
0400a6b0 4159 goto wait_on_recovery;
0ced63d1 4160 case -NFS4ERR_EXPIRED:
5d422301
TM		 4161 if (state != NULL) {
4162 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4163 goto stateid_invalid;
4164 }
1da177e4 4165 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4166 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4167 nfs4_schedule_lease_recovery(clp);
4168 goto wait_on_recovery;
4745e315
AA		 4169#if defined(CONFIG_NFS_V4_1)
4170 case -NFS4ERR_BADSESSION:
4171 case -NFS4ERR_BADSLOT:
4172 case -NFS4ERR_BAD_HIGH_SLOT:
4173 case -NFS4ERR_DEADSESSION:
4174 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4175 case -NFS4ERR_SEQ_FALSE_RETRY:
4176 case -NFS4ERR_SEQ_MISORDERED:
4177 dprintk("%s ERROR %d, Reset session\n", __func__,
4178 task->tk_status);
9f594791 4179 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4180 task->tk_status = 0;
4181 return -EAGAIN;
4182#endif /* CONFIG_NFS_V4_1 */
1da177e4 4183 case -NFS4ERR_DELAY:
aa5190d0 4184 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4185 case -NFS4ERR_GRACE:
1da177e4
LT		 4186 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4187 task->tk_status = 0;
4188 return -EAGAIN;
a8a4ae3a 4189 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4190 case -NFS4ERR_OLD_STATEID:
4191 task->tk_status = 0;
4192 return -EAGAIN;
4193 }
4194 task->tk_status = nfs4_map_errors(task->tk_status);
4195 return 0;
5d422301
TM		 4196stateid_invalid:
4197 task->tk_status = -EIO;
4198 return 0;
0400a6b0 4199wait_on_recovery:
a2c0b9e2 4200 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4201 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4202 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4203 task->tk_status = 0;
4204 return -EAGAIN;
1da177e4
LT		 4205}
4206
f092075d
CL		 4207static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4208 nfs4_verifier *bootverf)
cd93710e
CL		 4209{
4210 __be32 verf[2];
4211
2c820d9a
CL		 4212 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4213 /* An impossible timestamp guarantees this value
4214 * will never match a generated boot time. */
4215 verf[0] = 0;
4216 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4217 } else {
f092075d
CL		 4218 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4219 verf[0] = (__be32)nn->boot_time.tv_sec;
4220 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4221 }
cd93710e
CL		 4222 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4223}
4224
e984a55a
CL		 4225static unsigned int
4226nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4227 char *buf, size_t len)
4228{
4229 unsigned int result;
4230
4231 rcu_read_lock();
4232 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4233 clp->cl_ipaddr,
4234 rpc_peeraddr2str(clp->cl_rpcclient,
4235 RPC_DISPLAY_ADDR),
4236 rpc_peeraddr2str(clp->cl_rpcclient,
4237 RPC_DISPLAY_PROTO));
4238 rcu_read_unlock();
4239 return result;
4240}
4241
4242static unsigned int
4243nfs4_init_uniform_client_string(const struct nfs_client *clp,
4244 char *buf, size_t len)
4245{
6f2ea7f2
CL		 4246 char *nodename = clp->cl_rpcclient->cl_nodename;
4247
4248 if (nfs4_client_id_uniquifier[0] != '\0')
4249 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4250 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4251 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4252 nodename);
e984a55a
CL		 4253}
4254
6bbb4ae8
CL		 4255/**
4256 * nfs4_proc_setclientid - Negotiate client ID
4257 * @clp: state data structure
4258 * @program: RPC program for NFSv4 callback service
4259 * @port: IP port number for NFS4 callback service
4260 * @cred: RPC credential to use for this call
4261 * @res: where to place the result
4262 *
4263 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4264 */
bb8b27e5
TM		 4265int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4266 unsigned short port, struct rpc_cred *cred,
4267 struct nfs4_setclientid_res *res)
1da177e4
LT		 4268{
4269 nfs4_verifier sc_verifier;
4270 struct nfs4_setclientid setclientid = {
4271 .sc_verifier = &sc_verifier,
4272 .sc_prog = program,
f4eecd5d 4273 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4274 };
4275 struct rpc_message msg = {
4276 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4277 .rpc_argp = &setclientid,
bb8b27e5 4278 .rpc_resp = res,
286d7d6a 4279 .rpc_cred = cred,
1da177e4 4280 };
6bbb4ae8 4281 int status;
1da177e4 4282
de734831 4283 /* nfs_client_id4 */
f092075d 4284 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4285 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4286 setclientid.sc_name_len =
4287 nfs4_init_uniform_client_string(clp,
4288 setclientid.sc_name,
4289 sizeof(setclientid.sc_name));
4290 else
4291 setclientid.sc_name_len =
4292 nfs4_init_nonuniform_client_string(clp,
4293 setclientid.sc_name,
4294 sizeof(setclientid.sc_name));
de734831 4295 /* cb_client4 */
e984a55a 4296 rcu_read_lock();
de734831 4297 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4298 sizeof(setclientid.sc_netid),
4299 rpc_peeraddr2str(clp->cl_rpcclient,
4300 RPC_DISPLAY_NETID));
de734831
CL		 4301 rcu_read_unlock();
4302 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4303 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4304 clp->cl_ipaddr, port >> 8, port & 255);
4305
6bbb4ae8
CL		 4306 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4307 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4308 setclientid.sc_name_len, setclientid.sc_name);
4309 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4310 dprintk("NFS reply setclientid: %d\n", status);
4311 return status;
1da177e4
LT		 4312}
4313
6bbb4ae8
CL		 4314/**
4315 * nfs4_proc_setclientid_confirm - Confirm client ID
4316 * @clp: state data structure
4317 * @res: result of a previous SETCLIENTID
4318 * @cred: RPC credential to use for this call
4319 *
4320 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4321 */
fd954ae1 4322int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4323 struct nfs4_setclientid_res *arg,
4324 struct rpc_cred *cred)
1da177e4
LT		 4325{
4326 struct nfs_fsinfo fsinfo;
4327 struct rpc_message msg = {
4328 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4329 .rpc_argp = arg,
1da177e4 4330 .rpc_resp = &fsinfo,
286d7d6a 4331 .rpc_cred = cred,
1da177e4
LT		 4332 };
4333 unsigned long now;
4334 int status;
4335
6bbb4ae8
CL		 4336 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4337 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4338 clp->cl_clientid);
1da177e4 4339 now = jiffies;
1bd714f2 4340 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4341 if (status == 0) {
4342 spin_lock(&clp->cl_lock);
4343 clp->cl_lease_time = fsinfo.lease_time * HZ;
4344 clp->cl_last_renewal = now;
4345 spin_unlock(&clp->cl_lock);
4346 }
6bbb4ae8 4347 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4348 return status;
4349}
4350
fe650407
TM		 4351struct nfs4_delegreturndata {
4352 struct nfs4_delegreturnargs args;
fa178f29 4353 struct nfs4_delegreturnres res;
fe650407
TM		 4354 struct nfs_fh fh;
4355 nfs4_stateid stateid;
26e976a8 4356 unsigned long timestamp;
fa178f29 4357 struct nfs_fattr fattr;
fe650407
TM		 4358 int rpc_status;
4359};
4360
fe650407
TM		 4361static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4362{
4363 struct nfs4_delegreturndata *data = calldata;
938e1010 4364
14516c3a
TM		 4365 if (!nfs4_sequence_done(task, &data->res.seq_res))
4366 return;
938e1010 4367
79708861
RL		 4368 switch (task->tk_status) {
4369 case -NFS4ERR_STALE_STATEID:
4370 case -NFS4ERR_EXPIRED:
4371 case 0:
fa178f29 4372 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4373 break;
4374 default:
4375 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4376 -EAGAIN) {
d00c5d43 4377 rpc_restart_call_prepare(task);
79708861
RL		 4378 return;
4379 }
4380 }
4381 data->rpc_status = task->tk_status;
fe650407
TM		 4382}
4383
4384static void nfs4_delegreturn_release(void *calldata)
4385{
fe650407
TM		 4386 kfree(calldata);
4387}
4388
938e1010
AA		 4389#if defined(CONFIG_NFS_V4_1)
4390static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4391{
4392 struct nfs4_delegreturndata *d_data;
4393
4394 d_data = (struct nfs4_delegreturndata *)data;
4395
d9afbd1b
TM		 4396 nfs4_setup_sequence(d_data->res.server,
4397 &d_data->args.seq_args,
4398 &d_data->res.seq_res,
4399 task);
938e1010
AA		 4400}
4401#endif /* CONFIG_NFS_V4_1 */
4402
c8d149f3 4403static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4404#if defined(CONFIG_NFS_V4_1)
4405 .rpc_call_prepare = nfs4_delegreturn_prepare,
4406#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4407 .rpc_call_done = nfs4_delegreturn_done,
4408 .rpc_release = nfs4_delegreturn_release,
4409};
4410
e6f81075 4411static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4412{
4413 struct nfs4_delegreturndata *data;
fa178f29 4414 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4415 struct rpc_task *task;
5138fde0
TM		 4416 struct rpc_message msg = {
4417 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4418 .rpc_cred = cred,
4419 };
c970aa85
TM		 4420 struct rpc_task_setup task_setup_data = {
4421 .rpc_client = server->client,
5138fde0 4422 .rpc_message = &msg,
c970aa85
TM		 4423 .callback_ops = &nfs4_delegreturn_ops,
4424 .flags = RPC_TASK_ASYNC,
4425 };
e6f81075 4426 int status = 0;
fe650407 4427
8535b2be 4428 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4429 if (data == NULL)
4430 return -ENOMEM;
9d12b216 4431 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4432 data->args.fhandle = &data->fh;
4433 data->args.stateid = &data->stateid;
9e907fec 4434 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4435 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4436 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4437 data->res.fattr = &data->fattr;
4438 data->res.server = server;
5138fde0 4439 nfs_fattr_init(data->res.fattr);
26e976a8 4440 data->timestamp = jiffies;
fe650407
TM		 4441 data->rpc_status = 0;
4442
c970aa85 4443 task_setup_data.callback_data = data;
1174dd1f
TM		 4444 msg.rpc_argp = &data->args;
4445 msg.rpc_resp = &data->res;
c970aa85 4446 task = rpc_run_task(&task_setup_data);
7a1218a2 4447 if (IS_ERR(task))
fe650407 4448 return PTR_ERR(task);
e6f81075
TM		 4449 if (!issync)
4450 goto out;
fe650407 4451 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4452 if (status != 0)
4453 goto out;
4454 status = data->rpc_status;
e144cbcc
TM		 4455 if (status == 0)
4456 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4457 else
4458 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4459out:
e6b3c4db 4460 rpc_put_task(task);
fe650407 4461 return status;
1da177e4
LT		 4462}
4463
e6f81075 4464int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4465{
4466 struct nfs_server *server = NFS_SERVER(inode);
4467 struct nfs4_exception exception = { };
4468 int err;
4469 do {
e6f81075 4470 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4471 switch (err) {
4472 case -NFS4ERR_STALE_STATEID:
4473 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4474 case 0:
4475 return 0;
4476 }
4477 err = nfs4_handle_exception(server, err, &exception);
4478 } while (exception.retry);
4479 return err;
4480}
4481
4482#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4483#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4484
4485/*
4486 * sleep, with exponential backoff, and retry the LOCK operation.
4487 */
4488static unsigned long
4489nfs4_set_lock_task_retry(unsigned long timeout)
4490{
d310310c 4491 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4492 timeout <<= 1;
4493 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4494 return NFS4_LOCK_MAXTIMEOUT;
4495 return timeout;
4496}
4497
1da177e4
LT		 4498static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4499{
4500 struct inode *inode = state->inode;
4501 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4502 struct nfs_client *clp = server->nfs_client;
911d1aaf 4503 struct nfs_lockt_args arg = {
1da177e4 4504 .fh = NFS_FH(inode),
911d1aaf 4505 .fl = request,
1da177e4 4506 };
911d1aaf
TM		 4507 struct nfs_lockt_res res = {
4508 .denied = request,
1da177e4
LT		 4509 };
4510 struct rpc_message msg = {
4511 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4512 .rpc_argp = &arg,
4513 .rpc_resp = &res,
4514 .rpc_cred = state->owner->so_cred,
4515 };
1da177e4
LT		 4516 struct nfs4_lock_state *lsp;
4517 int status;
4518
911d1aaf 4519 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4520 status = nfs4_set_lock_state(state, request);
4521 if (status != 0)
4522 goto out;
4523 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4524 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4525 arg.lock_owner.s_dev = server->s_dev;
7c513058 4526 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4527 switch (status) {
4528 case 0:
4529 request->fl_type = F_UNLCK;
4530 break;
4531 case -NFS4ERR_DENIED:
4532 status = 0;
1da177e4 4533 }
70cc6487 4534 request->fl_ops->fl_release_private(request);
8d0a8a9d 4535out:
1da177e4
LT		 4536 return status;
4537}
4538
4539static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4540{
4541 struct nfs4_exception exception = { };
4542 int err;
4543
4544 do {
4545 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4546 _nfs4_proc_getlk(state, cmd, request),
4547 &exception);
4548 } while (exception.retry);
4549 return err;
4550}
4551
4552static int do_vfs_lock(struct file *file, struct file_lock *fl)
4553{
4554 int res = 0;
4555 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4556 case FL_POSIX:
4557 res = posix_lock_file_wait(file, fl);
4558 break;
4559 case FL_FLOCK:
4560 res = flock_lock_file_wait(file, fl);
4561 break;
4562 default:
4563 BUG();
4564 }
1da177e4
LT		 4565 return res;
4566}
4567
faf5f49c 4568struct nfs4_unlockdata {
911d1aaf
TM		 4569 struct nfs_locku_args arg;
4570 struct nfs_locku_res res;
faf5f49c
TM		 4571 struct nfs4_lock_state *lsp;
4572 struct nfs_open_context *ctx;
911d1aaf
TM		 4573 struct file_lock fl;
4574 const struct nfs_server *server;
26e976a8 4575 unsigned long timestamp;
faf5f49c
TM		 4576};
4577
911d1aaf
TM		 4578static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4579 struct nfs_open_context *ctx,
4580 struct nfs4_lock_state *lsp,
4581 struct nfs_seqid *seqid)
4582{
4583 struct nfs4_unlockdata *p;
4584 struct inode *inode = lsp->ls_state->inode;
4585
8535b2be 4586 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4587 if (p == NULL)
4588 return NULL;
4589 p->arg.fh = NFS_FH(inode);
4590 p->arg.fl = &p->fl;
4591 p->arg.seqid = seqid;
c1d51931 4592 p->res.seqid = seqid;
911d1aaf
TM		 4593 p->arg.stateid = &lsp->ls_stateid;
4594 p->lsp = lsp;
4595 atomic_inc(&lsp->ls_count);
4596 /* Ensure we don't close file until we're done freeing locks! */
4597 p->ctx = get_nfs_open_context(ctx);
4598 memcpy(&p->fl, fl, sizeof(p->fl));
4599 p->server = NFS_SERVER(inode);
4600 return p;
4601}
4602
06f814a3 4603static void nfs4_locku_release_calldata(void *data)
faf5f49c 4604{
963d8fe5 4605 struct nfs4_unlockdata *calldata = data;
911d1aaf 4606 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4607 nfs4_put_lock_state(calldata->lsp);
4608 put_nfs_open_context(calldata->ctx);
4609 kfree(calldata);
faf5f49c
TM		 4610}
4611
963d8fe5 4612static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4613{
963d8fe5 4614 struct nfs4_unlockdata *calldata = data;
faf5f49c 4615
14516c3a
TM		 4616 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4617 return;
faf5f49c
TM		 4618 switch (task->tk_status) {
4619 case 0:
f597c537
TM		 4620 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4621 &calldata->res.stateid);
26e976a8 4622 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4623 break;
9e33bed5
TM		 4624 case -NFS4ERR_BAD_STATEID:
4625 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4626 case -NFS4ERR_STALE_STATEID:
4627 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4628 break;
4629 default:
9e33bed5 4630 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4631 rpc_restart_call_prepare(task);
faf5f49c 4632 }
2b1bc308 4633 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4634}
4635
4ce70ada 4636static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4637{
4ce70ada 4638 struct nfs4_unlockdata *calldata = data;
faf5f49c 4639
911d1aaf 4640 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 4641 goto out_wait;
795a88c9 4642 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 4643 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 4644 goto out_no_action;
faf5f49c 4645 }
26e976a8 4646 calldata->timestamp = jiffies;
035168ab 4647 if (nfs4_setup_sequence(calldata->server,
a893693c 4648 &calldata->arg.seq_args,
2240a9e2
TM		 4649 &calldata->res.seq_res,
4650 task) != 0)
4651 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 4652 return;
4653out_no_action:
4654 task->tk_action = NULL;
4655out_wait:
4656 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4657}
4658
963d8fe5 4659static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4660 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4661 .rpc_call_done = nfs4_locku_done,
06f814a3 4662 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4663};
4664
a5d16a4d
TM		 4665static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4666 struct nfs_open_context *ctx,
4667 struct nfs4_lock_state *lsp,
4668 struct nfs_seqid *seqid)
4669{
4670 struct nfs4_unlockdata *data;
5138fde0
TM		 4671 struct rpc_message msg = {
4672 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4673 .rpc_cred = ctx->cred,
4674 };
c970aa85
TM		 4675 struct rpc_task_setup task_setup_data = {
4676 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4677 .rpc_message = &msg,
c970aa85 4678 .callback_ops = &nfs4_locku_ops,
101070ca 4679 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4680 .flags = RPC_TASK_ASYNC,
4681 };
a5d16a4d 4682
137d6aca
FF		 4683 /* Ensure this is an unlock - when canceling a lock, the
4684 * canceled lock is passed in, and it won't be an unlock.
4685 */
4686 fl->fl_type = F_UNLCK;
4687
a5d16a4d
TM		 4688 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4689 if (data == NULL) {
4690 nfs_free_seqid(seqid);
4691 return ERR_PTR(-ENOMEM);
4692 }
4693
9d12b216 4694 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4695 msg.rpc_argp = &data->arg;
4696 msg.rpc_resp = &data->res;
c970aa85
TM		 4697 task_setup_data.callback_data = data;
4698 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4699}
4700
faf5f49c
TM		 4701static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4702{
65b62a29
TM		 4703 struct inode *inode = state->inode;
4704 struct nfs4_state_owner *sp = state->owner;
4705 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 4706 struct nfs_seqid *seqid;
1da177e4 4707 struct nfs4_lock_state *lsp;
06f814a3
TM		 4708 struct rpc_task *task;
4709 int status = 0;
536ff0f8 4710 unsigned char fl_flags = request->fl_flags;
faf5f49c 4711
8d0a8a9d 4712 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4713 /* Unlock _before_ we do the RPC call */
4714 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 4715 /* Exclude nfs_delegation_claim_locks() */
4716 mutex_lock(&sp->so_delegreturn_mutex);
4717 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 4718 down_read(&nfsi->rwsem);
4719 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4720 up_read(&nfsi->rwsem);
65b62a29 4721 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 4722 goto out;
19e03c57
TM		 4723 }
4724 up_read(&nfsi->rwsem);
65b62a29 4725 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 4726 if (status != 0)
9b073574
TM		 4727 goto out;
4728 /* Is this a delegated lock? */
4729 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4730 goto out;
8d0a8a9d 4731 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4732 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4733 status = -ENOMEM;
911d1aaf 4734 if (seqid == NULL)
9b073574 4735 goto out;
cd3758e3 4736 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4737 status = PTR_ERR(task);
4738 if (IS_ERR(task))
9b073574 4739 goto out;
a5d16a4d 4740 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4741 rpc_put_task(task);
9b073574 4742out:
536ff0f8 4743 request->fl_flags = fl_flags;
1da177e4
LT		 4744 return status;
4745}
4746
a5d16a4d
TM		 4747struct nfs4_lockdata {
4748 struct nfs_lock_args arg;
4749 struct nfs_lock_res res;
4750 struct nfs4_lock_state *lsp;
4751 struct nfs_open_context *ctx;
4752 struct file_lock fl;
26e976a8 4753 unsigned long timestamp;
a5d16a4d
TM		 4754 int rpc_status;
4755 int cancelled;
66179efe 4756 struct nfs_server *server;
a5d16a4d
TM		 4757};
4758
4759static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4760 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4761 gfp_t gfp_mask)
1da177e4 4762{
a5d16a4d
TM		 4763 struct nfs4_lockdata *p;
4764 struct inode *inode = lsp->ls_state->inode;
1da177e4 4765 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4766
8535b2be 4767 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4768 if (p == NULL)
4769 return NULL;
4770
4771 p->arg.fh = NFS_FH(inode);
4772 p->arg.fl = &p->fl;
8535b2be 4773 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4774 if (p->arg.open_seqid == NULL)
4775 goto out_free;
8535b2be 4776 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4777 if (p->arg.lock_seqid == NULL)
2f74c0a0 4778 goto out_free_seqid;
a5d16a4d 4779 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4780 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4781 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4782 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4783 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4784 p->lsp = lsp;
66179efe 4785 p->server = server;
a5d16a4d
TM		 4786 atomic_inc(&lsp->ls_count);
4787 p->ctx = get_nfs_open_context(ctx);
4788 memcpy(&p->fl, fl, sizeof(p->fl));
4789 return p;
2f74c0a0
TM		 4790out_free_seqid:
4791 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4792out_free:
4793 kfree(p);
4794 return NULL;
4795}
4796
4797static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4798{
4799 struct nfs4_lockdata *data = calldata;
4800 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4801
3110ff80 4802 dprintk("%s: begin!\n", __func__);
2f74c0a0 4803 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 4804 goto out_wait;
a5d16a4d
TM		 4805 /* Do we need to do an open_to_lock_owner? */
4806 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4807 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4808 goto out_release_lock_seqid;
8fe72bac 4809 }
8e472f33 4810 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 4811 data->arg.new_lock_owner = 1;
c1d51931 4812 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4813 } else
4814 data->arg.new_lock_owner = 0;
5d422301
TM		 4815 if (!nfs4_valid_open_stateid(state)) {
4816 data->rpc_status = -EBADF;
4817 task->tk_action = NULL;
4818 goto out_release_open_seqid;
4819 }
26e976a8 4820 data->timestamp = jiffies;
035168ab
TM		 4821 if (nfs4_setup_sequence(data->server,
4822 &data->arg.seq_args,
2240a9e2 4823 &data->res.seq_res,
d9afbd1b 4824 task) == 0)
66179efe 4825 return;
5d422301 4826out_release_open_seqid:
2240a9e2
TM		 4827 nfs_release_seqid(data->arg.open_seqid);
4828out_release_lock_seqid:
4829 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 4830out_wait:
4831 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 4832 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4833}
4834
a5d16a4d
TM		 4835static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4836{
4837 struct nfs4_lockdata *data = calldata;
4838
3110ff80 4839 dprintk("%s: begin!\n", __func__);
a5d16a4d 4840
14516c3a
TM		 4841 if (!nfs4_sequence_done(task, &data->res.seq_res))
4842 return;
66179efe 4843
a5d16a4d 4844 data->rpc_status = task->tk_status;
a5d16a4d 4845 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4846 if (data->rpc_status == 0)
4847 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4848 else
4849 goto out;
4850 }
4851 if (data->rpc_status == 0) {
f597c537 4852 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4853 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4854 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4855 }
a5d16a4d 4856out:
3110ff80 4857 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4858}
4859
4860static void nfs4_lock_release(void *calldata)
4861{
4862 struct nfs4_lockdata *data = calldata;
4863
3110ff80 4864 dprintk("%s: begin!\n", __func__);
2f74c0a0 4865 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4866 if (data->cancelled != 0) {
4867 struct rpc_task *task;
4868 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4869 data->arg.lock_seqid);
4870 if (!IS_ERR(task))
bf294b41 4871 rpc_put_task_async(task);
3110ff80 4872 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4873 } else
4874 nfs_free_seqid(data->arg.lock_seqid);
4875 nfs4_put_lock_state(data->lsp);
4876 put_nfs_open_context(data->ctx);
4877 kfree(data);
3110ff80 4878 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4879}
4880
4881static const struct rpc_call_ops nfs4_lock_ops = {
4882 .rpc_call_prepare = nfs4_lock_prepare,
4883 .rpc_call_done = nfs4_lock_done,
4884 .rpc_release = nfs4_lock_release,
4885};
4886
2bee72a6
TM		 4887static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4888{
2bee72a6
TM		 4889 switch (error) {
4890 case -NFS4ERR_ADMIN_REVOKED:
4891 case -NFS4ERR_BAD_STATEID:
ecac799a 4892 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4893 if (new_lock_owner != 0 ||
795a88c9 4894 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4895 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4896 break;
4897 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4898 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4899 case -NFS4ERR_EXPIRED:
4900 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4901 };
4902}
4903
afe6c27c 4904static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4905{
4906 struct nfs4_lockdata *data;
4907 struct rpc_task *task;
5138fde0
TM		 4908 struct rpc_message msg = {
4909 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4910 .rpc_cred = state->owner->so_cred,
4911 };
c970aa85
TM		 4912 struct rpc_task_setup task_setup_data = {
4913 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4914 .rpc_message = &msg,
c970aa85 4915 .callback_ops = &nfs4_lock_ops,
101070ca 4916 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4917 .flags = RPC_TASK_ASYNC,
4918 };
a5d16a4d
TM		 4919 int ret;
4920
3110ff80 4921 dprintk("%s: begin!\n", __func__);
cd3758e3 4922 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4923 fl->fl_u.nfs4_fl.owner,
4924 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4925 if (data == NULL)
4926 return -ENOMEM;
4927 if (IS_SETLKW(cmd))
4928 data->arg.block = 1;
9d12b216 4929 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4930 msg.rpc_argp = &data->arg;
4931 msg.rpc_resp = &data->res;
c970aa85 4932 task_setup_data.callback_data = data;
8fe72bac
TM		 4933 if (recovery_type > NFS_LOCK_NEW) {
4934 if (recovery_type == NFS_LOCK_RECLAIM)
4935 data->arg.reclaim = NFS_LOCK_RECLAIM;
4936 nfs4_set_sequence_privileged(&data->arg.seq_args);
4937 }
c970aa85 4938 task = rpc_run_task(&task_setup_data);
7a1218a2 4939 if (IS_ERR(task))
a5d16a4d 4940 return PTR_ERR(task);
a5d16a4d
TM		 4941 ret = nfs4_wait_for_completion_rpc_task(task);
4942 if (ret == 0) {
4943 ret = data->rpc_status;
2bee72a6
TM		 4944 if (ret)
4945 nfs4_handle_setlk_error(data->server, data->lsp,
4946 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4947 } else
4948 data->cancelled = 1;
e6b3c4db 4949 rpc_put_task(task);
3110ff80 4950 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4951 return ret;
1da177e4
LT		 4952}
4953
4954static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4955{
202b50dc 4956 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4957 struct nfs4_exception exception = {
4958 .inode = state->inode,
4959 };
202b50dc
TM		 4960 int err;
4961
4962 do {
42a2d13e
TM		 4963 /* Cache the lock if possible... */
4964 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4965 return 0;
afe6c27c 4966 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4967 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4968 break;
4969 nfs4_handle_exception(server, err, &exception);
4970 } while (exception.retry);
4971 return err;
1da177e4
LT		 4972}
4973
4974static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4975{
202b50dc 4976 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4977 struct nfs4_exception exception = {
4978 .inode = state->inode,
4979 };
202b50dc
TM		 4980 int err;
4981
6bfc93ef
TM		 4982 err = nfs4_set_lock_state(state, request);
4983 if (err != 0)
4984 return err;
202b50dc 4985 do {
42a2d13e
TM		 4986 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4987 return 0;
afe6c27c 4988 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4989 switch (err) {
4990 default:
4991 goto out;
4992 case -NFS4ERR_GRACE:
4993 case -NFS4ERR_DELAY:
4994 nfs4_handle_exception(server, err, &exception);
4995 err = 0;
4996 }
202b50dc 4997 } while (exception.retry);
a9ed2e25 4998out:
202b50dc 4999 return err;
1da177e4
LT		 5000}
5001
f062eb6c 5002#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5003/**
5004 * nfs41_check_expired_locks - possibly free a lock stateid
5005 *
5006 * @state: NFSv4 state for an inode
5007 *
5008 * Returns NFS_OK if recovery for this stateid is now finished.
5009 * Otherwise a negative NFS4ERR value is returned.
5010 */
b01dd1d8 5011static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5012{
eb64cf96 5013 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5014 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5015 struct nfs_server *server = NFS_SERVER(state->inode);
5016
b01dd1d8 5017 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5018 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 5019 status = nfs41_test_stateid(server, &lsp->ls_stateid);
5020 if (status != NFS_OK) {
3e60ffdd
CL		 5021 /* Free the stateid unless the server
5022 * informs us the stateid is unrecognized. */
89af2739
CL		 5023 if (status != -NFS4ERR_BAD_STATEID)
5024 nfs41_free_stateid(server,
5025 &lsp->ls_stateid);
795a88c9 5026 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5027 ret = status;
5028 }
5029 }
5030 };
5031
5032 return ret;
5033}
5034
5035static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5036{
5037 int status = NFS_OK;
5038
5039 if (test_bit(LK_STATE_IN_USE, &state->flags))
5040 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5041 if (status != NFS_OK)
5042 status = nfs4_lock_expired(state, request);
5043 return status;
f062eb6c
BS		 5044}
5045#endif
5046
1da177e4
LT		 5047static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5048{
9a99af49 5049 struct nfs4_state_owner *sp = state->owner;
19e03c57 5050 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5051 unsigned char fl_flags = request->fl_flags;
9a99af49 5052 unsigned int seq;
8e469ebd 5053 int status = -ENOLCK;
1da177e4 5054
8e469ebd
TM		 5055 if ((fl_flags & FL_POSIX) &&
5056 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5057 goto out;
6bfc93ef 5058 /* Is this a delegated open? */
6bfc93ef
TM		 5059 status = nfs4_set_lock_state(state, request);
5060 if (status != 0)
5061 goto out;
01c3b861
TM		 5062 request->fl_flags |= FL_ACCESS;
5063 status = do_vfs_lock(request->fl_file, request);
5064 if (status < 0)
5065 goto out;
19e03c57 5066 down_read(&nfsi->rwsem);
01c3b861 5067 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5068 /* Yes: cache locks! */
01c3b861 5069 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5070 request->fl_flags = fl_flags & ~FL_SLEEP;
5071 status = do_vfs_lock(request->fl_file, request);
5072 goto out_unlock;
01c3b861 5073 }
9a99af49
TM		 5074 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5075 up_read(&nfsi->rwsem);
afe6c27c 5076 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5077 if (status != 0)
9a99af49
TM		 5078 goto out;
5079 down_read(&nfsi->rwsem);
5080 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5081 status = -NFS4ERR_DELAY;
01c3b861 5082 goto out_unlock;
9a99af49 5083 }
6bfc93ef 5084 /* Note: we always want to sleep here! */
01c3b861 5085 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5086 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5087 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5088 "manager!\n", __func__);
01c3b861 5089out_unlock:
19e03c57 5090 up_read(&nfsi->rwsem);
01c3b861
TM		 5091out:
5092 request->fl_flags = fl_flags;
1da177e4
LT		 5093 return status;
5094}
5095
5096static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5097{
a1d0b5ee
TM		 5098 struct nfs4_exception exception = {
5099 .state = state,
05ffe24f 5100 .inode = state->inode,
a1d0b5ee 5101 };
1da177e4
LT		 5102 int err;
5103
5104 do {
965b5d67
TM		 5105 err = _nfs4_proc_setlk(state, cmd, request);
5106 if (err == -NFS4ERR_DENIED)
5107 err = -EAGAIN;
1da177e4 5108 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5109 err, &exception);
1da177e4
LT		 5110 } while (exception.retry);
5111 return err;
5112}
5113
5114static int
5115nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5116{
5117 struct nfs_open_context *ctx;
5118 struct nfs4_state *state;
5119 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5120 int status;
5121
5122 /* verify open state */
cd3758e3 5123 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5124 state = ctx->state;
5125
5126 if (request->fl_start < 0 || request->fl_end < 0)
5127 return -EINVAL;
5128
d953126a
TM		 5129 if (IS_GETLK(cmd)) {
5130 if (state != NULL)
5131 return nfs4_proc_getlk(state, F_GETLK, request);
5132 return 0;
5133 }
1da177e4
LT		 5134
5135 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5136 return -EINVAL;
5137
d953126a
TM		 5138 if (request->fl_type == F_UNLCK) {
5139 if (state != NULL)
5140 return nfs4_proc_unlck(state, cmd, request);
5141 return 0;
5142 }
1da177e4 5143
d953126a
TM		 5144 if (state == NULL)
5145 return -ENOLCK;
55725513
TM		 5146 /*
5147 * Don't rely on the VFS having checked the file open mode,
5148 * since it won't do this for flock() locks.
5149 */
f44106e2 5150 switch (request->fl_type) {
55725513
TM		 5151 case F_RDLCK:
5152 if (!(filp->f_mode & FMODE_READ))
5153 return -EBADF;
5154 break;
5155 case F_WRLCK:
5156 if (!(filp->f_mode & FMODE_WRITE))
5157 return -EBADF;
5158 }
5159
1da177e4
LT		 5160 do {
5161 status = nfs4_proc_setlk(state, cmd, request);
5162 if ((status != -EAGAIN) || IS_SETLK(cmd))
5163 break;
5164 timeout = nfs4_set_lock_task_retry(timeout);
5165 status = -ERESTARTSYS;
5166 if (signalled())
5167 break;
5168 } while(status < 0);
1da177e4
LT		 5169 return status;
5170}
5171
db4f2e63 5172int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5173{
5174 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5175 int err;
5176
5177 err = nfs4_set_lock_state(state, fl);
5178 if (err != 0)
db4f2e63 5179 return err;
4a706fa0 5180 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5181 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5182}
6b3b5496 5183
cf470c3e
TM		 5184struct nfs_release_lockowner_data {
5185 struct nfs4_lock_state *lsp;
5ae67c4f 5186 struct nfs_server *server;
cf470c3e
TM		 5187 struct nfs_release_lockowner_args args;
5188};
5189
d3c7b7cc
TM		 5190static void nfs4_release_lockowner_release(void *calldata)
5191{
cf470c3e 5192 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5193 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5194 kfree(calldata);
5195}
5196
17280175 5197static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5198 .rpc_release = nfs4_release_lockowner_release,
5199};
5200
cf470c3e 5201int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 5202{
5203 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 5204 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5205 struct rpc_message msg = {
5206 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5207 };
5208
5209 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5210 return -EINVAL;
5211 data = kmalloc(sizeof(*data), GFP_NOFS);
5212 if (!data)
5213 return -ENOMEM;
5214 data->lsp = lsp;
5ae67c4f 5215 data->server = server;
cf470c3e
TM		 5216 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5217 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5218 data->args.lock_owner.s_dev = server->s_dev;
5219 msg.rpc_argp = &data->args;
5220 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5221 return 0;
d3c7b7cc
TM		 5222}
5223
aa1870af
BF		 5224#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5225
64c2ce8b
AK		 5226static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5227 const void *buf, size_t buflen,
5228 int flags, int type)
6b3b5496 5229{
64c2ce8b
AK		 5230 if (strcmp(key, "") != 0)
5231 return -EINVAL;
4b580ee3 5232
64c2ce8b 5233 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5234}
5235
64c2ce8b
AK		 5236static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5237 void *buf, size_t buflen, int type)
6b3b5496 5238{
64c2ce8b
AK		 5239 if (strcmp(key, "") != 0)
5240 return -EINVAL;
aa1870af 5241
64c2ce8b 5242 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5243}
5244
64c2ce8b
AK		 5245static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5246 size_t list_len, const char *name,
5247 size_t name_len, int type)
6b3b5496 5248{
64c2ce8b 5249 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5250
096455a2
BF		 5251 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5252 return 0;
64c2ce8b
AK		 5253
5254 if (list && len <= list_len)
5255 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5256 return len;
6b3b5496
BF		 5257}
5258
533eb461
AA		 5259/*
5260 * nfs_fhget will use either the mounted_on_fileid or the fileid
5261 */
69aaaae1
TM		 5262static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5263{
533eb461
AA		 5264 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5265 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5266 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5267 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5268 return;
5269
5270 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5271 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5272 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5273 fattr->nlink = 2;
5274}
5275
f05d147f
BS		 5276static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5277 const struct qstr *name,
5278 struct nfs4_fs_locations *fs_locations,
5279 struct page *page)
683b57b4
TM		 5280{
5281 struct nfs_server *server = NFS_SERVER(dir);
5282 u32 bitmask[2] = {
361e624f 5283 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5284 };
5285 struct nfs4_fs_locations_arg args = {
5286 .dir_fh = NFS_FH(dir),
c228fd3a 5287 .name = name,
683b57b4
TM		 5288 .page = page,
5289 .bitmask = bitmask,
5290 };
22958463
BH		 5291 struct nfs4_fs_locations_res res = {
5292 .fs_locations = fs_locations,
5293 };
683b57b4
TM		 5294 struct rpc_message msg = {
5295 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5296 .rpc_argp = &args,
22958463 5297 .rpc_resp = &res,
683b57b4
TM		 5298 };
5299 int status;
5300
3110ff80 5301 dprintk("%s: start\n", __func__);
533eb461
AA		 5302
5303 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5304 * is not supported */
5305 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5306 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5307 else
5308 bitmask[0] |= FATTR4_WORD0_FILEID;
5309
c228fd3a 5310 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5311 fs_locations->server = server;
830b8e33 5312 fs_locations->nlocations = 0;
f05d147f 5313 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5314 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5315 return status;
5316}
5317
f05d147f
BS		 5318int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5319 const struct qstr *name,
5320 struct nfs4_fs_locations *fs_locations,
5321 struct page *page)
db0a9593
BS		 5322{
5323 struct nfs4_exception exception = { };
5324 int err;
5325 do {
5326 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5327 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5328 &exception);
5329 } while (exception.retry);
5330 return err;
5331}
5332
5a5ea0d4
BS		 5333static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5334{
5335 int status;
5336 struct nfs4_secinfo_arg args = {
5337 .dir_fh = NFS_FH(dir),
5338 .name = name,
5339 };
5340 struct nfs4_secinfo_res res = {
5341 .flavors = flavors,
5342 };
5343 struct rpc_message msg = {
5344 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5345 .rpc_argp = &args,
5346 .rpc_resp = &res,
5347 };
5348
5349 dprintk("NFS call secinfo %s\n", name->name);
5350 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5351 dprintk("NFS reply secinfo: %d\n", status);
5352 return status;
5353}
5354
72de53ec
BS		 5355int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5356 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5357{
5358 struct nfs4_exception exception = { };
5359 int err;
5360 do {
5361 err = nfs4_handle_exception(NFS_SERVER(dir),
5362 _nfs4_proc_secinfo(dir, name, flavors),
5363 &exception);
5364 } while (exception.retry);
5365 return err;
5366}
5367
557134a3 5368#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5369/*
5370 * Check the exchange flags returned by the server for invalid flags, having
5371 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5372 * DS flags set.
5373 */
5374static int nfs4_check_cl_exchange_flags(u32 flags)
5375{
5376 if (flags & ~EXCHGID4_FLAG_MASK_R)
5377 goto out_inval;
5378 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5379 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5380 goto out_inval;
5381 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5382 goto out_inval;
5383 return NFS_OK;
5384out_inval:
5385 return -NFS4ERR_INVAL;
5386}
5387
78fe0f41 5388static bool
79d4e1f0
CL		 5389nfs41_same_server_scope(struct nfs41_server_scope *a,
5390 struct nfs41_server_scope *b)
78fe0f41
WAA		 5391{
5392 if (a->server_scope_sz == b->server_scope_sz &&
5393 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5394 return true;
5395
5396 return false;
5397}
5398
7c44f1ae
WAA		 5399/*
5400 * nfs4_proc_bind_conn_to_session()
5401 *
5402 * The 4.1 client currently uses the same TCP connection for the
5403 * fore and backchannel.
5404 */
2cf047c9 5405int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5406{
5407 int status;
5408 struct nfs41_bind_conn_to_session_res res;
5409 struct rpc_message msg = {
5410 .rpc_proc =
5411 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5412 .rpc_argp = clp,
5413 .rpc_resp = &res,
2cf047c9 5414 .rpc_cred = cred,
7c44f1ae
WAA		 5415 };
5416
5417 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5418
5419 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5420 if (unlikely(res.session == NULL)) {
5421 status = -ENOMEM;
5422 goto out;
5423 }
5424
5425 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5426 if (status == 0) {
5427 if (memcmp(res.session->sess_id.data,
5428 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5429 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5430 status = -EIO;
5431 goto out_session;
5432 }
5433 if (res.dir != NFS4_CDFS4_BOTH) {
5434 dprintk("NFS: %s: Unexpected direction from server\n",
5435 __func__);
5436 status = -EIO;
5437 goto out_session;
5438 }
5439 if (res.use_conn_in_rdma_mode) {
5440 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5441 __func__);
5442 status = -EIO;
5443 goto out_session;
5444 }
5445 }
5446out_session:
5447 kfree(res.session);
5448out:
5449 dprintk("<-- %s status= %d\n", __func__, status);
5450 return status;
5451}
5452
99fe60d0
BH		 5453/*
5454 * nfs4_proc_exchange_id()
5455 *
6bbb4ae8
CL		 5456 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5457 *
99fe60d0
BH		 5458 * Since the clientid has expired, all compounds using sessions
5459 * associated with the stale clientid will be returning
5460 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5461 * be in some phase of session reset.
5462 */
4d643d1d 5463int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5464{
5465 nfs4_verifier verifier;
5466 struct nfs41_exchange_id_args args = {
cd93710e 5467 .verifier = &verifier,
99fe60d0 5468 .client = clp,
357f54d6 5469 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5470 };
5471 struct nfs41_exchange_id_res res = {
32b01310 5472 0
99fe60d0
BH		 5473 };
5474 int status;
5475 struct rpc_message msg = {
5476 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5477 .rpc_argp = &args,
5478 .rpc_resp = &res,
5479 .rpc_cred = cred,
5480 };
99fe60d0 5481
f092075d 5482 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5483 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5484 sizeof(args.id));
6bbb4ae8
CL		 5485 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5486 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5487 args.id_len, args.id);
99fe60d0 5488
acdeb69d 5489 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5490 GFP_NOFS);
acdeb69d 5491 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5492 status = -ENOMEM;
5493 goto out;
5494 }
78fe0f41 5495
79d4e1f0 5496 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5497 GFP_NOFS);
177313f1 5498 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5499 status = -ENOMEM;
acdeb69d 5500 goto out_server_owner;
abe9a6d5 5501 }
78fe0f41 5502
bbafffd2 5503 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5504 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5505 status = -ENOMEM;
5506 goto out_server_scope;
5507 }
5508
1bd714f2 5509 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5510 if (status == 0)
32b01310 5511 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5512
acdeb69d 5513 if (status == 0) {
32b01310
TM		 5514 clp->cl_clientid = res.clientid;
5515 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5516 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5517 clp->cl_seqid = res.seqid;
5518
acdeb69d
CL		 5519 kfree(clp->cl_serverowner);
5520 clp->cl_serverowner = res.server_owner;
5521 res.server_owner = NULL;
78fe0f41 5522
7d2ed9ac 5523 /* use the most recent implementation id */
59155546
CL		 5524 kfree(clp->cl_implid);
5525 clp->cl_implid = res.impl_id;
7d2ed9ac 5526
177313f1 5527 if (clp->cl_serverscope != NULL &&
79d4e1f0 5528 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5529 res.server_scope)) {
5530 dprintk("%s: server_scope mismatch detected\n",
5531 __func__);
5532 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5533 kfree(clp->cl_serverscope);
5534 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5535 }
5536
177313f1 5537 if (clp->cl_serverscope == NULL) {
79d4e1f0 5538 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5539 goto out;
5540 }
32b01310
TM		 5541 } else
5542 kfree(res.impl_id);
7d2ed9ac 5543
acdeb69d
CL		 5544out_server_owner:
5545 kfree(res.server_owner);
7d2ed9ac 5546out_server_scope:
abe9a6d5
WAA		 5547 kfree(res.server_scope);
5548out:
177313f1 5549 if (clp->cl_implid != NULL)
6bbb4ae8 5550 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5551 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5552 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5553 clp->cl_implid->date.seconds,
5554 clp->cl_implid->date.nseconds);
6bbb4ae8 5555 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5556 return status;
5557}
5558
66245539
TM		 5559static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5560 struct rpc_cred *cred)
5561{
5562 struct rpc_message msg = {
5563 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5564 .rpc_argp = clp,
5565 .rpc_cred = cred,
5566 };
5567 int status;
5568
5569 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5570 if (status)
02c67525 5571 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5572 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5573 return status;
5574}
5575
5576static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5577 struct rpc_cred *cred)
5578{
5579 unsigned int loop;
5580 int ret;
5581
5582 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5583 ret = _nfs4_proc_destroy_clientid(clp, cred);
5584 switch (ret) {
5585 case -NFS4ERR_DELAY:
5586 case -NFS4ERR_CLIENTID_BUSY:
5587 ssleep(1);
5588 break;
5589 default:
5590 return ret;
5591 }
5592 }
5593 return 0;
5594}
5595
5596int nfs4_destroy_clientid(struct nfs_client *clp)
5597{
5598 struct rpc_cred *cred;
5599 int ret = 0;
5600
5601 if (clp->cl_mvops->minor_version < 1)
5602 goto out;
5603 if (clp->cl_exchange_flags == 0)
5604 goto out;
05f4c350
CL		 5605 if (clp->cl_preserve_clid)
5606 goto out;
66245539
TM		 5607 cred = nfs4_get_exchange_id_cred(clp);
5608 ret = nfs4_proc_destroy_clientid(clp, cred);
5609 if (cred)
5610 put_rpccred(cred);
5611 switch (ret) {
5612 case 0:
5613 case -NFS4ERR_STALE_CLIENTID:
5614 clp->cl_exchange_flags = 0;
5615 }
5616out:
5617 return ret;
5618}
5619
2050f0cc
AA		 5620struct nfs4_get_lease_time_data {
5621 struct nfs4_get_lease_time_args *args;
5622 struct nfs4_get_lease_time_res *res;
5623 struct nfs_client *clp;
5624};
5625
5626static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5627 void *calldata)
5628{
2050f0cc
AA		 5629 struct nfs4_get_lease_time_data *data =
5630 (struct nfs4_get_lease_time_data *)calldata;
5631
5632 dprintk("--> %s\n", __func__);
5633 /* just setup sequence, do not trigger session recovery
5634 since we're invoked within one */
d9afbd1b
TM		 5635 nfs41_setup_sequence(data->clp->cl_session,
5636 &data->args->la_seq_args,
5637 &data->res->lr_seq_res,
5638 task);
2050f0cc
AA		 5639 dprintk("<-- %s\n", __func__);
5640}
5641
5642/*
5643 * Called from nfs4_state_manager thread for session setup, so don't recover
5644 * from sequence operation or clientid errors.
5645 */
5646static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5647{
5648 struct nfs4_get_lease_time_data *data =
5649 (struct nfs4_get_lease_time_data *)calldata;
5650
5651 dprintk("--> %s\n", __func__);
14516c3a
TM		 5652 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5653 return;
2050f0cc
AA		 5654 switch (task->tk_status) {
5655 case -NFS4ERR_DELAY:
5656 case -NFS4ERR_GRACE:
5657 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5658 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5659 task->tk_status = 0;
a8a4ae3a
AA		 5660 /* fall through */
5661 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5662 rpc_restart_call_prepare(task);
2050f0cc
AA		 5663 return;
5664 }
2050f0cc
AA		 5665 dprintk("<-- %s\n", __func__);
5666}
5667
17280175 5668static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5669 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5670 .rpc_call_done = nfs4_get_lease_time_done,
5671};
5672
5673int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5674{
5675 struct rpc_task *task;
5676 struct nfs4_get_lease_time_args args;
5677 struct nfs4_get_lease_time_res res = {
5678 .lr_fsinfo = fsinfo,
5679 };
5680 struct nfs4_get_lease_time_data data = {
5681 .args = &args,
5682 .res = &res,
5683 .clp = clp,
5684 };
5685 struct rpc_message msg = {
5686 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5687 .rpc_argp = &args,
5688 .rpc_resp = &res,
5689 };
5690 struct rpc_task_setup task_setup = {
5691 .rpc_client = clp->cl_rpcclient,
5692 .rpc_message = &msg,
5693 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5694 .callback_data = &data,
5695 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5696 };
5697 int status;
5698
9d12b216 5699 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5700 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5701 dprintk("--> %s\n", __func__);
5702 task = rpc_run_task(&task_setup);
5703
5704 if (IS_ERR(task))
5705 status = PTR_ERR(task);
5706 else {
5707 status = task->tk_status;
5708 rpc_put_task(task);
5709 }
5710 dprintk("<-- %s return %d\n", __func__, status);
5711
5712 return status;
5713}
5714
fc931582
AA		 5715/*
5716 * Initialize the values to be used by the client in CREATE_SESSION
5717 * If nfs4_init_session set the fore channel request and response sizes,
5718 * use them.
5719 *
5720 * Set the back channel max_resp_sz_cached to zero to force the client to
5721 * always set csa_cachethis to FALSE because the current implementation
5722 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5723 */
5724static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5725{
5726 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5727 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5728 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5729
5730 if (mxrqst_sz == 0)
5731 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5732 if (mxresp_sz == 0)
5733 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5734 /* Fore channel attributes */
fc931582
AA		 5735 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5736 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5737 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5738 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5739
5740 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5741 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5742 __func__,
5743 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5744 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5745
5746 /* Back channel attributes */
fc931582
AA		 5747 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5748 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5749 args->bc_attrs.max_resp_sz_cached = 0;
5750 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5751 args->bc_attrs.max_reqs = 1;
5752
5753 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5754 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5755 __func__,
5756 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5757 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5758 args->bc_attrs.max_reqs);
5759}
5760
43c2e885 5761static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5762{
43c2e885
BF		 5763 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5764 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5765
43c2e885
BF		 5766 if (rcvd->max_resp_sz > sent->max_resp_sz)
5767 return -EINVAL;
5768 /*
5769 * Our requested max_ops is the minimum we need; we're not
5770 * prepared to break up compounds into smaller pieces than that.
5771 * So, no point even trying to continue if the server won't
5772 * cooperate:
5773 */
5774 if (rcvd->max_ops < sent->max_ops)
5775 return -EINVAL;
5776 if (rcvd->max_reqs == 0)
5777 return -EINVAL;
b4b9a0c1
VG		 5778 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5779 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5780 return 0;
8d35301d
AA		 5781}
5782
43c2e885
BF		 5783static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5784{
5785 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5786 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5787
43c2e885
BF		 5788 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5789 return -EINVAL;
5790 if (rcvd->max_resp_sz < sent->max_resp_sz)
5791 return -EINVAL;
5792 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5793 return -EINVAL;
5794 /* These would render the backchannel useless: */
b4b9a0c1 5795 if (rcvd->max_ops != sent->max_ops)
43c2e885 5796 return -EINVAL;
b4b9a0c1 5797 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5798 return -EINVAL;
5799 return 0;
5800}
8d35301d 5801
8d35301d
AA		 5802static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5803 struct nfs4_session *session)
5804{
43c2e885 5805 int ret;
8d35301d 5806
43c2e885
BF		 5807 ret = nfs4_verify_fore_channel_attrs(args, session);
5808 if (ret)
5809 return ret;
5810 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5811}
5812
848f5bda
TM		 5813static int _nfs4_proc_create_session(struct nfs_client *clp,
5814 struct rpc_cred *cred)
fc931582
AA		 5815{
5816 struct nfs4_session *session = clp->cl_session;
5817 struct nfs41_create_session_args args = {
5818 .client = clp,
5819 .cb_program = NFS4_CALLBACK,
5820 };
5821 struct nfs41_create_session_res res = {
5822 .client = clp,
5823 };
5824 struct rpc_message msg = {
5825 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5826 .rpc_argp = &args,
5827 .rpc_resp = &res,
848f5bda 5828 .rpc_cred = cred,
fc931582
AA		 5829 };
5830 int status;
5831
5832 nfs4_init_channel_attrs(&args);
0f91421e 5833 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5834
1bd714f2 5835 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5836
43095d39 5837 if (!status) {
8d35301d
AA		 5838 /* Verify the session's negotiated channel_attrs values */
5839 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5840 /* Increment the clientid slot sequence id */
5841 clp->cl_seqid++;
5842 }
5843
5844 return status;
5845}
5846
5847/*
5848 * Issues a CREATE_SESSION operation to the server.
5849 * It is the responsibility of the caller to verify the session is
5850 * expired before calling this routine.
5851 */
848f5bda 5852int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5853{
5854 int status;
5855 unsigned *ptr;
fc931582
AA		 5856 struct nfs4_session *session = clp->cl_session;
5857
5858 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5859
848f5bda 5860 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5861 if (status)
5862 goto out;
5863
aacd5537
AA		 5864 /* Init or reset the session slot tables */
5865 status = nfs4_setup_session_slot_tables(session);
5866 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5867 if (status)
5868 goto out;
5869
5870 ptr = (unsigned *)&session->sess_id.data[0];
5871 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5872 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5873out:
5874 dprintk("<-- %s\n", __func__);
5875 return status;
5876}
5877
0f3e66c6
AA		 5878/*
5879 * Issue the over-the-wire RPC DESTROY_SESSION.
5880 * The caller must serialize access to this routine.
5881 */
848f5bda
TM		 5882int nfs4_proc_destroy_session(struct nfs4_session *session,
5883 struct rpc_cred *cred)
0f3e66c6 5884{
848f5bda
TM		 5885 struct rpc_message msg = {
5886 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5887 .rpc_argp = session,
5888 .rpc_cred = cred,
5889 };
0f3e66c6 5890 int status = 0;
0f3e66c6
AA		 5891
5892 dprintk("--> nfs4_proc_destroy_session\n");
5893
5894 /* session is still being setup */
5895 if (session->clp->cl_cons_state != NFS_CS_READY)
5896 return status;
5897
1bd714f2 5898 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5899
5900 if (status)
08106ac7 5901 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5902 "Session has been destroyed regardless...\n", status);
5903
5904 dprintk("<-- nfs4_proc_destroy_session\n");
5905 return status;
5906}
5907
fc01cea9
AA		 5908/*
5909 * Renew the cl_session lease.
5910 */
d5f8d3fe
TM		 5911struct nfs4_sequence_data {
5912 struct nfs_client *clp;
5913 struct nfs4_sequence_args args;
5914 struct nfs4_sequence_res res;
5915};
5916
dc96aef9
AB		 5917static void nfs41_sequence_release(void *data)
5918{
d5f8d3fe
TM		 5919 struct nfs4_sequence_data *calldata = data;
5920 struct nfs_client *clp = calldata->clp;
dc96aef9 5921
7135840f
AB		 5922 if (atomic_read(&clp->cl_count) > 1)
5923 nfs4_schedule_state_renewal(clp);
5924 nfs_put_client(clp);
d5f8d3fe 5925 kfree(calldata);
dc96aef9
AB		 5926}
5927
aa5190d0
TM		 5928static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5929{
5930 switch(task->tk_status) {
5931 case -NFS4ERR_DELAY:
aa5190d0
TM		 5932 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5933 return -EAGAIN;
5934 default:
0400a6b0 5935 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5936 }
5937 return 0;
5938}
5939
dc96aef9 5940static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5941{
d5f8d3fe
TM		 5942 struct nfs4_sequence_data *calldata = data;
5943 struct nfs_client *clp = calldata->clp;
fc01cea9 5944
14516c3a
TM		 5945 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5946 return;
fc01cea9
AA		 5947
5948 if (task->tk_status < 0) {
5949 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5950 if (atomic_read(&clp->cl_count) == 1)
5951 goto out;
fc01cea9 5952
aa5190d0
TM		 5953 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5954 rpc_restart_call_prepare(task);
fc01cea9
AA		 5955 return;
5956 }
5957 }
fc01cea9 5958 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5959out:
fc01cea9
AA		 5960 dprintk("<-- %s\n", __func__);
5961}
5962
5963static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5964{
d5f8d3fe
TM		 5965 struct nfs4_sequence_data *calldata = data;
5966 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5967 struct nfs4_sequence_args *args;
5968 struct nfs4_sequence_res *res;
5969
fc01cea9
AA		 5970 args = task->tk_msg.rpc_argp;
5971 res = task->tk_msg.rpc_resp;
5972
d9afbd1b 5973 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 5974}
5975
5976static const struct rpc_call_ops nfs41_sequence_ops = {
5977 .rpc_call_done = nfs41_sequence_call_done,
5978 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5979 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5980};
5981
8fe72bac
TM		 5982static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
5983 struct rpc_cred *cred,
5984 bool is_privileged)
fc01cea9 5985{
d5f8d3fe 5986 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5987 struct rpc_message msg = {
5988 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5989 .rpc_cred = cred,
5990 };
71ac6da9
TM		 5991 struct rpc_task_setup task_setup_data = {
5992 .rpc_client = clp->cl_rpcclient,
5993 .rpc_message = &msg,
8fe72bac 5994 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 5995 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 5996 };
fc01cea9 5997
7135840f 5998 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5999 return ERR_PTR(-EIO);
dfb4f309 6000 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6001 if (calldata == NULL) {
7135840f 6002 nfs_put_client(clp);
71ac6da9 6003 return ERR_PTR(-ENOMEM);
fc01cea9 6004 }
9d12b216 6005 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6006 if (is_privileged)
6007 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6008 msg.rpc_argp = &calldata->args;
6009 msg.rpc_resp = &calldata->res;
6010 calldata->clp = clp;
71ac6da9 6011 task_setup_data.callback_data = calldata;
fc01cea9 6012
71ac6da9
TM		 6013 return rpc_run_task(&task_setup_data);
6014}
6015
2f60ea6b 6016static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6017{
6018 struct rpc_task *task;
6019 int ret = 0;
6020
2f60ea6b
TM		 6021 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6022 return 0;
8fe72bac 6023 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6024 if (IS_ERR(task))
6025 ret = PTR_ERR(task);
6026 else
bf294b41 6027 rpc_put_task_async(task);
71ac6da9
TM		 6028 dprintk("<-- %s status=%d\n", __func__, ret);
6029 return ret;
6030}
6031
6032static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6033{
6034 struct rpc_task *task;
6035 int ret;
6036
8fe72bac 6037 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6038 if (IS_ERR(task)) {
6039 ret = PTR_ERR(task);
6040 goto out;
6041 }
6042 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6043 if (!ret) {
6044 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6045
6046 if (task->tk_status == 0)
6047 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6048 ret = task->tk_status;
b4410c2f 6049 }
71ac6da9
TM		 6050 rpc_put_task(task);
6051out:
6052 dprintk("<-- %s status=%d\n", __func__, ret);
6053 return ret;
fc01cea9
AA		 6054}
6055
fce5c838
RL		 6056struct nfs4_reclaim_complete_data {
6057 struct nfs_client *clp;
6058 struct nfs41_reclaim_complete_args arg;
6059 struct nfs41_reclaim_complete_res res;
6060};
6061
6062static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6063{
6064 struct nfs4_reclaim_complete_data *calldata = data;
6065
d9afbd1b
TM		 6066 nfs41_setup_sequence(calldata->clp->cl_session,
6067 &calldata->arg.seq_args,
6068 &calldata->res.seq_res,
6069 task);
fce5c838
RL		 6070}
6071
aa5190d0
TM		 6072static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6073{
6074 switch(task->tk_status) {
6075 case 0:
6076 case -NFS4ERR_COMPLETE_ALREADY:
6077 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6078 break;
6079 case -NFS4ERR_DELAY:
aa5190d0 6080 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6081 /* fall through */
6082 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6083 return -EAGAIN;
6084 default:
0400a6b0 6085 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6086 }
6087 return 0;
6088}
6089
fce5c838
RL		 6090static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6091{
6092 struct nfs4_reclaim_complete_data *calldata = data;
6093 struct nfs_client *clp = calldata->clp;
6094 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6095
6096 dprintk("--> %s\n", __func__);
14516c3a
TM		 6097 if (!nfs41_sequence_done(task, res))
6098 return;
fce5c838 6099
aa5190d0
TM		 6100 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6101 rpc_restart_call_prepare(task);
6102 return;
6103 }
fce5c838
RL		 6104 dprintk("<-- %s\n", __func__);
6105}
6106
6107static void nfs4_free_reclaim_complete_data(void *data)
6108{
6109 struct nfs4_reclaim_complete_data *calldata = data;
6110
6111 kfree(calldata);
6112}
6113
6114static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6115 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6116 .rpc_call_done = nfs4_reclaim_complete_done,
6117 .rpc_release = nfs4_free_reclaim_complete_data,
6118};
6119
6120/*
6121 * Issue a global reclaim complete.
6122 */
6123static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6124{
6125 struct nfs4_reclaim_complete_data *calldata;
6126 struct rpc_task *task;
6127 struct rpc_message msg = {
6128 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6129 };
6130 struct rpc_task_setup task_setup_data = {
6131 .rpc_client = clp->cl_rpcclient,
6132 .rpc_message = &msg,
6133 .callback_ops = &nfs4_reclaim_complete_call_ops,
6134 .flags = RPC_TASK_ASYNC,
6135 };
6136 int status = -ENOMEM;
6137
6138 dprintk("--> %s\n", __func__);
8535b2be 6139 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6140 if (calldata == NULL)
6141 goto out;
6142 calldata->clp = clp;
6143 calldata->arg.one_fs = 0;
fce5c838 6144
9d12b216 6145 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6146 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6147 msg.rpc_argp = &calldata->arg;
6148 msg.rpc_resp = &calldata->res;
6149 task_setup_data.callback_data = calldata;
6150 task = rpc_run_task(&task_setup_data);
acf82b85 6151 if (IS_ERR(task)) {
fce5c838 6152 status = PTR_ERR(task);
acf82b85
DC		 6153 goto out;
6154 }
c34c32ea
AA		 6155 status = nfs4_wait_for_completion_rpc_task(task);
6156 if (status == 0)
6157 status = task->tk_status;
fce5c838 6158 rpc_put_task(task);
acf82b85 6159 return 0;
fce5c838
RL		 6160out:
6161 dprintk("<-- %s status=%d\n", __func__, status);
6162 return status;
6163}
b1f69b75
AA		 6164
6165static void
6166nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6167{
6168 struct nfs4_layoutget *lgp = calldata;
c31663d4 6169 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6170 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6171
6172 dprintk("--> %s\n", __func__);
c31663d4
FI		 6173 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6174 * right now covering the LAYOUTGET we are about to send.
6175 * However, that is not so catastrophic, and there seems
6176 * to be no way to prevent it completely.
6177 */
6ba7db34 6178 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6179 &lgp->res.seq_res, task))
b1f69b75 6180 return;
cf7d63f1
FI		 6181 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6182 NFS_I(lgp->args.inode)->layout,
6183 lgp->args.ctx->state)) {
6184 rpc_exit(task, NFS4_OK);
cf7d63f1 6185 }
b1f69b75
AA		 6186}
6187
6188static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6189{
6190 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6191 struct inode *inode = lgp->args.inode;
6192 struct nfs_server *server = NFS_SERVER(inode);
6193 struct pnfs_layout_hdr *lo;
6194 struct nfs4_state *state = NULL;
30005121 6195 unsigned long timeo, giveup;
b1f69b75
AA		 6196
6197 dprintk("--> %s\n", __func__);
6198
6ba7db34 6199 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6200 goto out;
b1f69b75
AA		 6201
6202 switch (task->tk_status) {
6203 case 0:
ee314c2a 6204 goto out;
b1f69b75
AA		 6205 case -NFS4ERR_LAYOUTTRYLATER:
6206 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6207 timeo = rpc_get_timeout(task->tk_client);
6208 giveup = lgp->args.timestamp + timeo;
6209 if (time_after(giveup, jiffies))
6210 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6211 break;
6212 case -NFS4ERR_EXPIRED:
6213 case -NFS4ERR_BAD_STATEID:
6214 spin_lock(&inode->i_lock);
6215 lo = NFS_I(inode)->layout;
6216 if (!lo || list_empty(&lo->plh_segs)) {
6217 spin_unlock(&inode->i_lock);
6218 /* If the open stateid was bad, then recover it. */
6219 state = lgp->args.ctx->state;
6220 } else {
6221 LIST_HEAD(head);
6222
6223 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6224 spin_unlock(&inode->i_lock);
6225 /* Mark the bad layout state as invalid, then
6226 * retry using the open stateid. */
6227 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6228 }
6229 }
ee314c2a
TM		 6230 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6231 rpc_restart_call_prepare(task);
6232out:
b1f69b75
AA		 6233 dprintk("<-- %s\n", __func__);
6234}
6235
8554116e
IK		 6236static size_t max_response_pages(struct nfs_server *server)
6237{
6238 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6239 return nfs_page_array_len(0, max_resp_sz);
6240}
6241
6242static void nfs4_free_pages(struct page **pages, size_t size)
6243{
6244 int i;
6245
6246 if (!pages)
6247 return;
6248
6249 for (i = 0; i < size; i++) {
6250 if (!pages[i])
6251 break;
6252 __free_page(pages[i]);
6253 }
6254 kfree(pages);
6255}
6256
6257static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6258{
6259 struct page **pages;
6260 int i;
6261
6262 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6263 if (!pages) {
6264 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6265 return NULL;
6266 }
6267
6268 for (i = 0; i < size; i++) {
6269 pages[i] = alloc_page(gfp_flags);
6270 if (!pages[i]) {
6271 dprintk("%s: failed to allocate page\n", __func__);
6272 nfs4_free_pages(pages, size);
6273 return NULL;
6274 }
6275 }
6276
6277 return pages;
6278}
6279
b1f69b75
AA		 6280static void nfs4_layoutget_release(void *calldata)
6281{
6282 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6283 struct inode *inode = lgp->args.inode;
6284 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6285 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6286
6287 dprintk("--> %s\n", __func__);
8554116e 6288 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6289 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6290 put_nfs_open_context(lgp->args.ctx);
6291 kfree(calldata);
6292 dprintk("<-- %s\n", __func__);
6293}
6294
6295static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6296 .rpc_call_prepare = nfs4_layoutget_prepare,
6297 .rpc_call_done = nfs4_layoutget_done,
6298 .rpc_release = nfs4_layoutget_release,
6299};
6300
a0b0a6e3
TM		 6301struct pnfs_layout_segment *
6302nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6303{
a47970ff
WAA		 6304 struct inode *inode = lgp->args.inode;
6305 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6306 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6307 struct rpc_task *task;
6308 struct rpc_message msg = {
6309 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6310 .rpc_argp = &lgp->args,
6311 .rpc_resp = &lgp->res,
6312 };
6313 struct rpc_task_setup task_setup_data = {
6314 .rpc_client = server->client,
6315 .rpc_message = &msg,
6316 .callback_ops = &nfs4_layoutget_call_ops,
6317 .callback_data = lgp,
6318 .flags = RPC_TASK_ASYNC,
6319 };
a0b0a6e3 6320 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6321 int status = 0;
6322
6323 dprintk("--> %s\n", __func__);
6324
8554116e
IK		 6325 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6326 if (!lgp->args.layout.pages) {
6327 nfs4_layoutget_release(lgp);
a0b0a6e3 6328 return ERR_PTR(-ENOMEM);
8554116e
IK		 6329 }
6330 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6331 lgp->args.timestamp = jiffies;
8554116e 6332
35124a09 6333 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6334 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6335 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6336
6337 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6338 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6339
b1f69b75
AA		 6340 task = rpc_run_task(&task_setup_data);
6341 if (IS_ERR(task))
a0b0a6e3 6342 return ERR_CAST(task);
b1f69b75 6343 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6344 if (status == 0)
6345 status = task->tk_status;
085b7a45
WAA		 6346 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6347 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6348 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6349 rpc_put_task(task);
6350 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6351 if (status)
6352 return ERR_PTR(status);
6353 return lseg;
b1f69b75
AA		 6354}
6355
cbe82603
BH		 6356static void
6357nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6358{
6359 struct nfs4_layoutreturn *lrp = calldata;
6360
6361 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6362 nfs41_setup_sequence(lrp->clp->cl_session,
6363 &lrp->args.seq_args,
6364 &lrp->res.seq_res,
6365 task);
cbe82603
BH		 6366}
6367
6368static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6369{
6370 struct nfs4_layoutreturn *lrp = calldata;
6371 struct nfs_server *server;
6372
6373 dprintk("--> %s\n", __func__);
6374
6ba7db34 6375 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6376 return;
6377
6378 server = NFS_SERVER(lrp->args.inode);
6379 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6380 rpc_restart_call_prepare(task);
cbe82603
BH		 6381 return;
6382 }
cbe82603
BH		 6383 dprintk("<-- %s\n", __func__);
6384}
6385
6386static void nfs4_layoutreturn_release(void *calldata)
6387{
6388 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6389 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6390
6391 dprintk("--> %s\n", __func__);
849b286f
TM		 6392 spin_lock(&lo->plh_inode->i_lock);
6393 if (lrp->res.lrs_present)
6394 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6395 lo->plh_block_lgets--;
6396 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6397 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6398 kfree(calldata);
6399 dprintk("<-- %s\n", __func__);
6400}
6401
6402static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6403 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6404 .rpc_call_done = nfs4_layoutreturn_done,
6405 .rpc_release = nfs4_layoutreturn_release,
6406};
6407
6408int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6409{
6410 struct rpc_task *task;
6411 struct rpc_message msg = {
6412 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6413 .rpc_argp = &lrp->args,
6414 .rpc_resp = &lrp->res,
6415 };
6416 struct rpc_task_setup task_setup_data = {
6417 .rpc_client = lrp->clp->cl_rpcclient,
6418 .rpc_message = &msg,
6419 .callback_ops = &nfs4_layoutreturn_call_ops,
6420 .callback_data = lrp,
6421 };
6422 int status;
6423
6424 dprintk("--> %s\n", __func__);
9d12b216 6425 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6426 task = rpc_run_task(&task_setup_data);
6427 if (IS_ERR(task))
6428 return PTR_ERR(task);
6429 status = task->tk_status;
6430 dprintk("<-- %s status=%d\n", __func__, status);
6431 rpc_put_task(task);
6432 return status;
6433}
6434
7f11d8d3
AA		 6435/*
6436 * Retrieve the list of Data Server devices from the MDS.
6437 */
6438static int _nfs4_getdevicelist(struct nfs_server *server,
6439 const struct nfs_fh *fh,
6440 struct pnfs_devicelist *devlist)
6441{
6442 struct nfs4_getdevicelist_args args = {
6443 .fh = fh,
6444 .layoutclass = server->pnfs_curr_ld->id,
6445 };
6446 struct nfs4_getdevicelist_res res = {
6447 .devlist = devlist,
6448 };
6449 struct rpc_message msg = {
6450 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6451 .rpc_argp = &args,
6452 .rpc_resp = &res,
6453 };
6454 int status;
6455
6456 dprintk("--> %s\n", __func__);
6457 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6458 &res.seq_res, 0);
6459 dprintk("<-- %s status=%d\n", __func__, status);
6460 return status;
6461}
6462
6463int nfs4_proc_getdevicelist(struct nfs_server *server,
6464 const struct nfs_fh *fh,
6465 struct pnfs_devicelist *devlist)
6466{
6467 struct nfs4_exception exception = { };
6468 int err;
6469
6470 do {
6471 err = nfs4_handle_exception(server,
6472 _nfs4_getdevicelist(server, fh, devlist),
6473 &exception);
6474 } while (exception.retry);
6475
6476 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6477 err, devlist->num_devs);
6478
6479 return err;
6480}
6481EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6482
b1f69b75
AA		 6483static int
6484_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6485{
6486 struct nfs4_getdeviceinfo_args args = {
6487 .pdev = pdev,
6488 };
6489 struct nfs4_getdeviceinfo_res res = {
6490 .pdev = pdev,
6491 };
6492 struct rpc_message msg = {
6493 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6494 .rpc_argp = &args,
6495 .rpc_resp = &res,
6496 };
6497 int status;
6498
6499 dprintk("--> %s\n", __func__);
7c513058 6500 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6501 dprintk("<-- %s status=%d\n", __func__, status);
6502
6503 return status;
6504}
6505
6506int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6507{
6508 struct nfs4_exception exception = { };
6509 int err;
6510
6511 do {
6512 err = nfs4_handle_exception(server,
6513 _nfs4_proc_getdeviceinfo(server, pdev),
6514 &exception);
6515 } while (exception.retry);
6516 return err;
6517}
6518EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6519
863a3c6c
AA		 6520static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6521{
6522 struct nfs4_layoutcommit_data *data = calldata;
6523 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6524 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6525
d9afbd1b
TM		 6526 nfs41_setup_sequence(session,
6527 &data->args.seq_args,
6528 &data->res.seq_res,
6529 task);
863a3c6c
AA		 6530}
6531
6532static void
6533nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6534{
6535 struct nfs4_layoutcommit_data *data = calldata;
6536 struct nfs_server *server = NFS_SERVER(data->args.inode);
6537
6ba7db34 6538 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6539 return;
6540
6541 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6542 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6543 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6544 case -NFS4ERR_BADLAYOUT: /* no layout */
6545 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6546 task->tk_status = 0;
e59d27e0
TM		 6547 break;
6548 case 0:
863a3c6c
AA		 6549 nfs_post_op_update_inode_force_wcc(data->args.inode,
6550 data->res.fattr);
e59d27e0
TM		 6551 break;
6552 default:
6553 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6554 rpc_restart_call_prepare(task);
6555 return;
6556 }
6557 }
863a3c6c
AA		 6558}
6559
6560static void nfs4_layoutcommit_release(void *calldata)
6561{
6562 struct nfs4_layoutcommit_data *data = calldata;
6563
db29c089 6564 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 6565 put_rpccred(data->cred);
6566 kfree(data);
6567}
6568
6569static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6570 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6571 .rpc_call_done = nfs4_layoutcommit_done,
6572 .rpc_release = nfs4_layoutcommit_release,
6573};
6574
6575int
ef311537 6576nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6577{
6578 struct rpc_message msg = {
6579 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6580 .rpc_argp = &data->args,
6581 .rpc_resp = &data->res,
6582 .rpc_cred = data->cred,
6583 };
6584 struct rpc_task_setup task_setup_data = {
6585 .task = &data->task,
6586 .rpc_client = NFS_CLIENT(data->args.inode),
6587 .rpc_message = &msg,
6588 .callback_ops = &nfs4_layoutcommit_ops,
6589 .callback_data = data,
6590 .flags = RPC_TASK_ASYNC,
6591 };
6592 struct rpc_task *task;
6593 int status = 0;
6594
6595 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6596 "lbw: %llu inode %lu\n",
6597 data->task.tk_pid, sync,
6598 data->args.lastbytewritten,
6599 data->args.inode->i_ino);
6600
9d12b216 6601 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6602 task = rpc_run_task(&task_setup_data);
6603 if (IS_ERR(task))
6604 return PTR_ERR(task);
ef311537 6605 if (sync == false)
863a3c6c
AA		 6606 goto out;
6607 status = nfs4_wait_for_completion_rpc_task(task);
6608 if (status != 0)
6609 goto out;
6610 status = task->tk_status;
6611out:
6612 dprintk("%s: status %d\n", __func__, status);
6613 rpc_put_task(task);
6614 return status;
6615}
fca78d6d
BS		 6616
6617static int
6618_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6619 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6620{
6621 struct nfs41_secinfo_no_name_args args = {
6622 .style = SECINFO_STYLE_CURRENT_FH,
6623 };
6624 struct nfs4_secinfo_res res = {
6625 .flavors = flavors,
6626 };
6627 struct rpc_message msg = {
6628 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6629 .rpc_argp = &args,
6630 .rpc_resp = &res,
6631 };
6632 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6633}
6634
6635static int
6636nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6637 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6638{
6639 struct nfs4_exception exception = { };
6640 int err;
6641 do {
6642 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6643 switch (err) {
6644 case 0:
6645 case -NFS4ERR_WRONGSEC:
6646 case -NFS4ERR_NOTSUPP:
05e9cfb4 6647 goto out;
fca78d6d
BS		 6648 default:
6649 err = nfs4_handle_exception(server, err, &exception);
6650 }
6651 } while (exception.retry);
05e9cfb4 6652out:
fca78d6d
BS		 6653 return err;
6654}
6655
6656static int
6657nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6658 struct nfs_fsinfo *info)
6659{
6660 int err;
6661 struct page *page;
6662 rpc_authflavor_t flavor;
6663 struct nfs4_secinfo_flavors *flavors;
6664
6665 page = alloc_page(GFP_KERNEL);
6666 if (!page) {
6667 err = -ENOMEM;
6668 goto out;
6669 }
6670
6671 flavors = page_address(page);
6672 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6673
6674 /*
6675 * Fall back on "guess and check" method if
6676 * the server doesn't support SECINFO_NO_NAME
6677 */
6678 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6679 err = nfs4_find_root_sec(server, fhandle, info);
6680 goto out_freepage;
6681 }
6682 if (err)
6683 goto out_freepage;
6684
6685 flavor = nfs_find_best_sec(flavors);
6686 if (err == 0)
6687 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6688
6689out_freepage:
6690 put_page(page);
6691 if (err == -EACCES)
6692 return -EPERM;
6693out:
6694 return err;
6695}
1cab0652
BS		 6696
6697static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6698{
6699 int status;
6700 struct nfs41_test_stateid_args args = {
1cab0652 6701 .stateid = stateid,
7d974794
BS		 6702 };
6703 struct nfs41_test_stateid_res res;
6704 struct rpc_message msg = {
6705 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6706 .rpc_argp = &args,
6707 .rpc_resp = &res,
6708 };
1cab0652 6709
38527b15 6710 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6711 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6712 nfs4_set_sequence_privileged(&args.seq_args);
6713 status = nfs4_call_sync_sequence(server->client, server, &msg,
6714 &args.seq_args, &res.seq_res);
38527b15
CL		 6715 if (status != NFS_OK) {
6716 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6717 return status;
38527b15
CL		 6718 }
6719 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6720 return -res.status;
7d974794
BS		 6721}
6722
38527b15
CL		 6723/**
6724 * nfs41_test_stateid - perform a TEST_STATEID operation
6725 *
6726 * @server: server / transport on which to perform the operation
6727 * @stateid: state ID to test
6728 *
6729 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6730 * Otherwise a negative NFS4ERR value is returned if the operation
6731 * failed or the state ID is not currently valid.
6732 */
1cab0652 6733static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6734{
6735 struct nfs4_exception exception = { };
6736 int err;
6737 do {
377e507d
CL		 6738 err = _nfs41_test_stateid(server, stateid);
6739 if (err != -NFS4ERR_DELAY)
6740 break;
6741 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6742 } while (exception.retry);
6743 return err;
6744}
9aeda35f 6745
1cab0652 6746static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6747{
9aeda35f 6748 struct nfs41_free_stateid_args args = {
1cab0652 6749 .stateid = stateid,
9aeda35f
BS		 6750 };
6751 struct nfs41_free_stateid_res res;
6752 struct rpc_message msg = {
6753 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6754 .rpc_argp = &args,
6755 .rpc_resp = &res,
6756 };
38527b15 6757 int status;
9aeda35f 6758
38527b15 6759 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6760 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 6761 nfs4_set_sequence_privileged(&args.seq_args);
38527b15 6762 status = nfs4_call_sync_sequence(server->client, server, &msg,
8fe72bac 6763 &args.seq_args, &res.seq_res);
38527b15
CL		 6764 dprintk("NFS reply free_stateid: %d\n", status);
6765 return status;
9aeda35f
BS		 6766}
6767
38527b15
CL		 6768/**
6769 * nfs41_free_stateid - perform a FREE_STATEID operation
6770 *
6771 * @server: server / transport on which to perform the operation
6772 * @stateid: state ID to release
6773 *
6774 * Returns NFS_OK if the server freed "stateid". Otherwise a
6775 * negative NFS4ERR value is returned.
6776 */
1cab0652 6777static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6778{
6779 struct nfs4_exception exception = { };
6780 int err;
6781 do {
377e507d
CL		 6782 err = _nfs4_free_stateid(server, stateid);
6783 if (err != -NFS4ERR_DELAY)
6784 break;
6785 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6786 } while (exception.retry);
6787 return err;
6788}
36281caa
TM		 6789
6790static bool nfs41_match_stateid(const nfs4_stateid *s1,
6791 const nfs4_stateid *s2)
6792{
2d2f24ad 6793 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6794 return false;
6795
2d2f24ad 6796 if (s1->seqid == s2->seqid)
36281caa 6797 return true;
2d2f24ad 6798 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6799 return true;
6800
6801 return false;
6802}
6803
557134a3
AA		 6804#endif /* CONFIG_NFS_V4_1 */
6805
36281caa
TM		 6806static bool nfs4_match_stateid(const nfs4_stateid *s1,
6807 const nfs4_stateid *s2)
6808{
f597c537 6809 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6810}
6811
6812
17280175 6813static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6814 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6815 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6816 .recover_open = nfs4_open_reclaim,
6817 .recover_lock = nfs4_lock_reclaim,
591d71cb 6818 .establish_clid = nfs4_init_clientid,
90a16617 6819 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6820 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6821};
6822
591d71cb 6823#if defined(CONFIG_NFS_V4_1)
17280175 6824static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6825 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6826 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6827 .recover_open = nfs4_open_reclaim,
6828 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6829 .establish_clid = nfs41_init_clientid,
b4b82607 6830 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6831 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6832 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6833};
6834#endif /* CONFIG_NFS_V4_1 */
6835
17280175 6836static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6837 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6838 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6839 .recover_open = nfs4_open_expired,
6840 .recover_lock = nfs4_lock_expired,
6841 .establish_clid = nfs4_init_clientid,
90a16617 6842 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6843};
6844
6845#if defined(CONFIG_NFS_V4_1)
17280175 6846static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6847 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6848 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6849 .recover_open = nfs41_open_expired,
6850 .recover_lock = nfs41_lock_expired,
4d643d1d 6851 .establish_clid = nfs41_init_clientid,
b4b82607 6852 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6853};
591d71cb 6854#endif /* CONFIG_NFS_V4_1 */
1da177e4 6855
17280175 6856static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6857 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6858 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6859 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6860};
6861
6862#if defined(CONFIG_NFS_V4_1)
17280175 6863static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6864 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6865 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6866 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6867};
6868#endif
6869
97dc1359
TM		 6870static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6871 .minor_version = 0,
39c6daae
TM		 6872 .init_caps = NFS_CAP_READDIRPLUS
6873 | NFS_CAP_ATOMIC_OPEN
6874 | NFS_CAP_CHANGE_ATTR
6875 | NFS_CAP_POSIX_LOCK,
97dc1359 6876 .call_sync = _nfs4_call_sync,
36281caa 6877 .match_stateid = nfs4_match_stateid,
fca78d6d 6878 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6879 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6880 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6881 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6882};
6883
6884#if defined(CONFIG_NFS_V4_1)
6885static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6886 .minor_version = 1,
39c6daae
TM		 6887 .init_caps = NFS_CAP_READDIRPLUS
6888 | NFS_CAP_ATOMIC_OPEN
6889 | NFS_CAP_CHANGE_ATTR
3b66486c 6890 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 6891 | NFS_CAP_STATEID_NFSV41
6892 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 6893 .call_sync = nfs4_call_sync_sequence,
36281caa 6894 .match_stateid = nfs41_match_stateid,
fca78d6d 6895 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6896 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6897 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6898 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6899};
6900#endif
6901
97dc1359
TM		 6902const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6903 [0] = &nfs_v4_0_minor_ops,
6904#if defined(CONFIG_NFS_V4_1)
6905 [1] = &nfs_v4_1_minor_ops,
6906#endif
6907};
6908
73a79706
BS		 6909const struct inode_operations nfs4_dir_inode_operations = {
6910 .create = nfs_create,
6911 .lookup = nfs_lookup,
6912 .atomic_open = nfs_atomic_open,
6913 .link = nfs_link,
6914 .unlink = nfs_unlink,
6915 .symlink = nfs_symlink,
6916 .mkdir = nfs_mkdir,
6917 .rmdir = nfs_rmdir,
6918 .mknod = nfs_mknod,
6919 .rename = nfs_rename,
6920 .permission = nfs_permission,
6921 .getattr = nfs_getattr,
6922 .setattr = nfs_setattr,
6923 .getxattr = generic_getxattr,
6924 .setxattr = generic_setxattr,
6925 .listxattr = generic_listxattr,
6926 .removexattr = generic_removexattr,
6927};
6928
92e1d5be 6929static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6930 .permission = nfs_permission,
6931 .getattr = nfs_getattr,
6932 .setattr = nfs_setattr,
64c2ce8b
AK		 6933 .getxattr = generic_getxattr,
6934 .setxattr = generic_setxattr,
6935 .listxattr = generic_listxattr,
6936 .removexattr = generic_removexattr,
6b3b5496
BF		 6937};
6938
509de811 6939const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6940 .version = 4, /* protocol version */
6941 .dentry_ops = &nfs4_dentry_operations,
6942 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6943 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6944 .file_ops = &nfs4_file_operations,
1da177e4 6945 .getroot = nfs4_proc_get_root,
281cad46 6946 .submount = nfs4_submount,
ff9099f2 6947 .try_mount = nfs4_try_mount,
1da177e4
LT		 6948 .getattr = nfs4_proc_getattr,
6949 .setattr = nfs4_proc_setattr,
6950 .lookup = nfs4_proc_lookup,
6951 .access = nfs4_proc_access,
6952 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6953 .create = nfs4_proc_create,
6954 .remove = nfs4_proc_remove,
6955 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6956 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6957 .unlink_done = nfs4_proc_unlink_done,
6958 .rename = nfs4_proc_rename,
d3d4152a 6959 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6960 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6961 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6962 .link = nfs4_proc_link,
6963 .symlink = nfs4_proc_symlink,
6964 .mkdir = nfs4_proc_mkdir,
6965 .rmdir = nfs4_proc_remove,
6966 .readdir = nfs4_proc_readdir,
6967 .mknod = nfs4_proc_mknod,
6968 .statfs = nfs4_proc_statfs,
6969 .fsinfo = nfs4_proc_fsinfo,
6970 .pathconf = nfs4_proc_pathconf,
e9326dca 6971 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6972 .decode_dirent = nfs4_decode_dirent,
6973 .read_setup = nfs4_proc_read_setup,
1abb5088 6974 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 6975 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6976 .read_done = nfs4_read_done,
1da177e4 6977 .write_setup = nfs4_proc_write_setup,
57208fa7 6978 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 6979 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6980 .write_done = nfs4_write_done,
1da177e4 6981 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 6982 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 6983 .commit_done = nfs4_commit_done,
1da177e4 6984 .lock = nfs4_proc_lock,
e50a1c2e 6985 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6986 .close_context = nfs4_close_context,
2b484297 6987 .open_context = nfs4_atomic_open,
011e2a7f 6988 .have_delegation = nfs4_have_delegation,
57ec14c5 6989 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 6990 .alloc_client = nfs4_alloc_client,
45a52a02 6991 .init_client = nfs4_init_client,
cdb7eced 6992 .free_client = nfs4_free_client,
1179acc6
BS		 6993 .create_server = nfs4_create_server,
6994 .clone_server = nfs_clone_server,
1da177e4
LT		 6995};
6996
64c2ce8b
AK		 6997static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6998 .prefix = XATTR_NAME_NFSV4_ACL,
6999 .list = nfs4_xattr_list_nfs4_acl,
7000 .get = nfs4_xattr_get_nfs4_acl,
7001 .set = nfs4_xattr_set_nfs4_acl,
7002};
7003
7004const struct xattr_handler *nfs4_xattr_handlers[] = {
7005 &nfs4_xattr_nfs4_acl_handler,
7006 NULL
7007};
7008
1da177e4
LT		 7009/*
7010 * Local variables:
7011 * c-basic-offset: 8
7012 * End:
7013 */
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