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NFSv4: Clean up nfs4_open_delegation_recall
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4
LT		 68
69#define NFSDBG_FACILITY NFSDBG_PROC
70
2066fe89 71#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 72#define NFS4_POLL_RETRY_MAX (15*HZ)
73
cdd4e68b 74struct nfs4_opendata;
864472e9 75static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 76static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 77static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 78static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 79static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
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:
9e33bed5
TM		 307 if (state == NULL)
308 break;
14977489 309 nfs_remove_bad_delegation(state->inode);
5d422301
TM		 310 ret = nfs4_schedule_stateid_recovery(server, state);
311 if (ret < 0)
312 break;
0400a6b0 313 goto wait_on_recovery;
0ced63d1 314 case -NFS4ERR_EXPIRED:
5d422301
TM		 315 if (state != NULL) {
316 ret = nfs4_schedule_stateid_recovery(server, state);
317 if (ret < 0)
318 break;
319 }
65de872e 320 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 321 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 322 nfs4_schedule_lease_recovery(clp);
323 goto wait_on_recovery;
03391693 324#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 325 case -NFS4ERR_BADSESSION:
326 case -NFS4ERR_BADSLOT:
327 case -NFS4ERR_BAD_HIGH_SLOT:
328 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
329 case -NFS4ERR_DEADSESSION:
330 case -NFS4ERR_SEQ_FALSE_RETRY:
331 case -NFS4ERR_SEQ_MISORDERED:
332 dprintk("%s ERROR: %d Reset session\n", __func__,
333 errorcode);
9f594791 334 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 335 goto wait_on_recovery;
03391693 336#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 337 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 338 if (exception->timeout > HZ) {
339 /* We have retried a decent amount, time to
340 * fail
341 */
342 ret = -EBUSY;
343 break;
344 }
65de872e
TM		 345 case -NFS4ERR_GRACE:
346 case -NFS4ERR_DELAY:
347 ret = nfs4_delay(server->client, &exception->timeout);
348 if (ret != 0)
349 break;
a8a4ae3a 350 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 351 case -NFS4ERR_OLD_STATEID:
352 exception->retry = 1;
b064eca2
TM		 353 break;
354 case -NFS4ERR_BADOWNER:
355 /* The following works around a Linux server bug! */
356 case -NFS4ERR_BADNAME:
357 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
358 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
359 exception->retry = 1;
360 printk(KERN_WARNING "NFS: v4 server %s "
361 "does not accept raw "
362 "uid/gids. "
363 "Reenabling the idmapper.\n",
364 server->nfs_client->cl_hostname);
365 }
65de872e
TM		 366 }
367 /* We failed to handle the error */
368 return nfs4_map_errors(ret);
0400a6b0 369wait_on_recovery:
a2c0b9e2
TM		 370 ret = nfs4_wait_clnt_recover(clp);
371 if (ret == 0)
372 exception->retry = 1;
373 return ret;
65de872e
TM		 374}
375
376
452e9352 377static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 378{
1da177e4
LT		 379 spin_lock(&clp->cl_lock);
380 if (time_before(clp->cl_last_renewal,timestamp))
381 clp->cl_last_renewal = timestamp;
382 spin_unlock(&clp->cl_lock);
383}
384
452e9352
TM		 385static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
386{
387 do_renew_lease(server->nfs_client, timestamp);
388}
389
cccef3b9
AA		 390#if defined(CONFIG_NFS_V4_1)
391
d185a334 392static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 393{
e3725ec0 394 struct nfs4_session *session;
13615871 395 struct nfs4_slot_table *tbl;
c10e4498 396 bool send_new_highest_used_slotid = false;
13615871 397
dfb4f309 398 if (!res->sr_slot) {
13615871
AA		 399 /* just wake up the next guy waiting since
400 * we may have not consumed a slot after all */
691daf3b 401 dprintk("%s: No slot\n", __func__);
35dc1d74 402 return;
13615871 403 }
e3725ec0
TM		 404 tbl = res->sr_slot->table;
405 session = tbl->session;
ea028ac9 406
35dc1d74 407 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 408 /* Be nice to the server: try to ensure that the last transmitted
409 * value for highest_user_slotid <= target_highest_slotid
410 */
411 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
412 send_new_highest_used_slotid = true;
413
b75ad4cd
TM		 414 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
415 send_new_highest_used_slotid = false;
416 goto out_unlock;
417 }
f4af6e2a 418 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 419
420 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
421 send_new_highest_used_slotid = false;
b75ad4cd 422out_unlock:
35dc1d74 423 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 424 res->sr_slot = NULL;
c10e4498
TM		 425 if (send_new_highest_used_slotid)
426 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 427}
428
14516c3a 429static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 430{
e3725ec0 431 struct nfs4_session *session;
933602e3 432 struct nfs4_slot *slot;
14516c3a 433 struct nfs_client *clp;
ac20d163 434 bool interrupted = false;
85563073 435 int ret = 1;
b0df806c 436
468f8613
BS		 437 /* don't increment the sequence number if the task wasn't sent */
438 if (!RPC_WAS_SENT(task))
b0df806c
AA		 439 goto out;
440
933602e3 441 slot = res->sr_slot;
e3725ec0 442 session = slot->table->session;
933602e3 443
ac20d163
TM		 444 if (slot->interrupted) {
445 slot->interrupted = 0;
446 interrupted = true;
447 }
448
691daf3b 449 /* Check the SEQUENCE operation status */
14516c3a
TM		 450 switch (res->sr_status) {
451 case 0:
b0df806c 452 /* Update the slot's sequence and clientid lease timer */
933602e3 453 ++slot->seq_nr;
e3725ec0 454 clp = session->clp;
8e63b6a8 455 do_renew_lease(clp, res->sr_timestamp);
0629e370 456 /* Check sequence flags */
b4410c2f
TM		 457 if (res->sr_status_flags != 0)
458 nfs4_schedule_lease_recovery(clp);
464ee9f9 459 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 460 break;
ac20d163
TM		 461 case 1:
462 /*
463 * sr_status remains 1 if an RPC level error occurred.
464 * The server may or may not have processed the sequence
465 * operation..
466 * Mark the slot as having hosted an interrupted RPC call.
467 */
468 slot->interrupted = 1;
469 goto out;
14516c3a
TM		 470 case -NFS4ERR_DELAY:
471 /* The server detected a resend of the RPC call and
472 * returned NFS4ERR_DELAY as per Section 2.10.6.2
473 * of RFC5661.
474 */
df2fabff 475 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 476 __func__,
df2fabff 477 slot->slot_nr,
933602e3 478 slot->seq_nr);
14516c3a 479 goto out_retry;
85563073
TM		 480 case -NFS4ERR_BADSLOT:
481 /*
482 * The slot id we used was probably retired. Try again
483 * using a different slot id.
484 */
e8794440
TM		 485 goto retry_nowait;
486 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 487 /*
488 * Was the last operation on this sequence interrupted?
489 * If so, retry after bumping the sequence number.
490 */
491 if (interrupted) {
492 ++slot->seq_nr;
493 goto retry_nowait;
494 }
e8794440
TM		 495 /*
496 * Could this slot have been previously retired?
497 * If so, then the server may be expecting seq_nr = 1!
498 */
8e63b6a8
TM		 499 if (slot->seq_nr != 1) {
500 slot->seq_nr = 1;
501 goto retry_nowait;
502 }
503 break;
e8794440
TM		 504 case -NFS4ERR_SEQ_FALSE_RETRY:
505 ++slot->seq_nr;
506 goto retry_nowait;
14516c3a
TM		 507 default:
508 /* Just update the slot sequence no. */
933602e3 509 ++slot->seq_nr;
b0df806c
AA		 510 }
511out:
512 /* The session may be reset by one of the error handlers. */
513 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 514 nfs41_sequence_free_slot(res);
85563073 515 return ret;
e8794440
TM		 516retry_nowait:
517 if (rpc_restart_call_prepare(task)) {
518 task->tk_status = 0;
519 ret = 0;
520 }
521 goto out;
14516c3a 522out_retry:
d05dd4e9 523 if (!rpc_restart_call(task))
14516c3a
TM		 524 goto out;
525 rpc_delay(task, NFS4_POLL_RETRY_MAX);
526 return 0;
b0df806c
AA		 527}
528
14516c3a
TM		 529static int nfs4_sequence_done(struct rpc_task *task,
530 struct nfs4_sequence_res *res)
df896455 531{
e3725ec0 532 if (res->sr_slot == NULL)
14516c3a
TM		 533 return 1;
534 return nfs41_sequence_done(task, res);
df896455
TM		 535}
536
9d12b216
TM		 537static void nfs41_init_sequence(struct nfs4_sequence_args *args,
538 struct nfs4_sequence_res *res, int cache_reply)
539{
2b2fa717 540 args->sa_slot = NULL;
9d12b216 541 args->sa_cache_this = 0;
8fe72bac 542 args->sa_privileged = 0;
9d12b216
TM		 543 if (cache_reply)
544 args->sa_cache_this = 1;
9d12b216
TM		 545 res->sr_slot = NULL;
546}
547
8fe72bac
TM		 548static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
549{
550 args->sa_privileged = 1;
551}
552
dc70d7b3 553int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 554 struct nfs4_sequence_args *args,
555 struct nfs4_sequence_res *res,
ce5039c1
AA		 556 struct rpc_task *task)
557{
fbcd4abc
AA		 558 struct nfs4_slot *slot;
559 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 560
561 dprintk("--> %s\n", __func__);
ce5039c1 562 /* slot already allocated? */
dfb4f309 563 if (res->sr_slot != NULL)
d9afbd1b 564 goto out_success;
ce5039c1 565
fbcd4abc
AA		 566 tbl = &session->fc_slot_table;
567
69d206b5
TM		 568 task->tk_timeout = 0;
569
fbcd4abc 570 spin_lock(&tbl->slot_tbl_lock);
a2118c33 571 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
8fe72bac 572 !args->sa_privileged) {
0b1c8fc4 573 /* The state manager will wait until the slot table is empty */
0b1c8fc4 574 dprintk("%s session is draining\n", __func__);
7b939a3f 575 goto out_sleep;
689cf5c1
AB		 576 }
577
2dc03b7f 578 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 579 if (IS_ERR(slot)) {
580 /* If out of memory, try again in 1/4 second */
581 if (slot == ERR_PTR(-ENOMEM))
582 task->tk_timeout = HZ >> 2;
fbcd4abc 583 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 584 goto out_sleep;
fbcd4abc
AA		 585 }
586 spin_unlock(&tbl->slot_tbl_lock);
587
2b2fa717 588 args->sa_slot = slot;
fbcd4abc 589
2dc03b7f
TM		 590 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
591 slot->slot_nr, slot->seq_nr);
fbcd4abc 592
dfb4f309 593 res->sr_slot = slot;
8e63b6a8 594 res->sr_timestamp = jiffies;
2a6e26cd 595 res->sr_status_flags = 0;
fbcd4abc
AA		 596 /*
597 * sr_status is only set in decode_sequence, and so will remain
598 * set to 1 if an rpc level failure occurs.
599 */
600 res->sr_status = 1;
d9afbd1b
TM		 601out_success:
602 rpc_call_start(task);
ce5039c1 603 return 0;
7b939a3f 604out_sleep:
8fe72bac
TM		 605 /* Privileged tasks are queued with top priority */
606 if (args->sa_privileged)
1e1093c7
TM		 607 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
608 NULL, RPC_PRIORITY_PRIVILEGED);
609 else
610 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 611 spin_unlock(&tbl->slot_tbl_lock);
612 return -EAGAIN;
ce5039c1 613}
dc70d7b3 614EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 615
035168ab 616int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 617 struct nfs4_sequence_args *args,
618 struct nfs4_sequence_res *res,
ce5039c1
AA		 619 struct rpc_task *task)
620{
035168ab 621 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 622 int ret = 0;
623
d9afbd1b
TM		 624 if (session == NULL) {
625 rpc_call_start(task);
035168ab 626 goto out;
d9afbd1b 627 }
035168ab 628
df2fabff 629 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 630 __func__, session->clp, session, res->sr_slot ?
df2fabff 631 res->sr_slot->slot_nr : -1);
ce5039c1 632
9d12b216 633 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 634out:
635 dprintk("<-- %s status=%d\n", __func__, ret);
636 return ret;
637}
638
639struct nfs41_call_sync_data {
035168ab 640 const struct nfs_server *seq_server;
ce5039c1
AA		 641 struct nfs4_sequence_args *seq_args;
642 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 643};
644
645static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
646{
647 struct nfs41_call_sync_data *data = calldata;
6ba7db34 648 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 649
035168ab
TM		 650 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
651
d9afbd1b 652 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 653}
654
69ab40c4
AA		 655static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
656{
657 struct nfs41_call_sync_data *data = calldata;
658
14516c3a 659 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 660}
661
17280175 662static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 663 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 664 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 665};
666
7c513058
BS		 667static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
668 struct nfs_server *server,
ce5039c1
AA		 669 struct rpc_message *msg,
670 struct nfs4_sequence_args *args,
8fe72bac 671 struct nfs4_sequence_res *res)
ce5039c1
AA		 672{
673 int ret;
674 struct rpc_task *task;
675 struct nfs41_call_sync_data data = {
035168ab 676 .seq_server = server,
ce5039c1
AA		 677 .seq_args = args,
678 .seq_res = res,
ce5039c1
AA		 679 };
680 struct rpc_task_setup task_setup = {
7c513058 681 .rpc_client = clnt,
ce5039c1
AA		 682 .rpc_message = msg,
683 .callback_ops = &nfs41_call_sync_ops,
684 .callback_data = &data
685 };
686
ce5039c1
AA		 687 task = rpc_run_task(&task_setup);
688 if (IS_ERR(task))
689 ret = PTR_ERR(task);
690 else {
691 ret = task->tk_status;
692 rpc_put_task(task);
693 }
694 return ret;
695}
696
df896455 697#else
8fe72bac 698static
9d12b216
TM		 699void nfs41_init_sequence(struct nfs4_sequence_args *args,
700 struct nfs4_sequence_res *res, int cache_reply)
701{
702}
703
8fe72bac
TM		 704static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
705{
706}
707
708
14516c3a
TM		 709static int nfs4_sequence_done(struct rpc_task *task,
710 struct nfs4_sequence_res *res)
df896455 711{
14516c3a 712 return 1;
df896455 713}
cccef3b9
AA		 714#endif /* CONFIG_NFS_V4_1 */
715
fd0c0953 716static
7c513058
BS		 717int _nfs4_call_sync(struct rpc_clnt *clnt,
718 struct nfs_server *server,
cccef3b9
AA		 719 struct rpc_message *msg,
720 struct nfs4_sequence_args *args,
fd0c0953 721 struct nfs4_sequence_res *res)
cccef3b9 722{
7c513058 723 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 724}
725
fd0c0953 726static
7c513058
BS		 727int nfs4_call_sync(struct rpc_clnt *clnt,
728 struct nfs_server *server,
e73b83f2
BS		 729 struct rpc_message *msg,
730 struct nfs4_sequence_args *args,
731 struct nfs4_sequence_res *res,
732 int cache_reply)
733{
fd0c0953 734 nfs41_init_sequence(args, res, cache_reply);
7c513058 735 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
fd0c0953 736 args, res);
e73b83f2 737}
cccef3b9 738
38478b24 739static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 740{
38478b24 741 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 742
38478b24 743 spin_lock(&dir->i_lock);
359d7d1c 744 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 745 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 746 nfs_force_lookup_revalidate(dir);
a9a4a87a 747 dir->i_version = cinfo->after;
de242c0b 748 nfs_fscache_invalidate(dir);
38478b24 749 spin_unlock(&dir->i_lock);
1da177e4
LT		 750}
751
e56e0b78 752struct nfs4_opendata {
c6d00e63 753 struct kref kref;
e56e0b78
TM		 754 struct nfs_openargs o_arg;
755 struct nfs_openres o_res;
cdd4e68b
TM		 756 struct nfs_open_confirmargs c_arg;
757 struct nfs_open_confirmres c_res;
6926afd1
TM		 758 struct nfs4_string owner_name;
759 struct nfs4_string group_name;
e56e0b78 760 struct nfs_fattr f_attr;
e56e0b78 761 struct dentry *dir;
82a2c1b7 762 struct dentry *dentry;
e56e0b78 763 struct nfs4_state_owner *owner;
aac00a8d 764 struct nfs4_state *state;
e56e0b78 765 struct iattr attrs;
26e976a8 766 unsigned long timestamp;
3e309914 767 unsigned int rpc_done : 1;
24ac23ab
TM		 768 int rpc_status;
769 int cancelled;
e56e0b78
TM		 770};
771
49f9a0fa
TM		 772static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
773 int err, struct nfs4_exception *exception)
774{
775 if (err != -EINVAL)
776 return false;
777 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
778 return false;
779 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
780 exception->retry = 1;
781 return true;
782}
783
784static enum open_claim_type4
785nfs4_map_atomic_open_claim(struct nfs_server *server,
786 enum open_claim_type4 claim)
787{
788 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
789 return claim;
790 switch (claim) {
791 default:
792 return claim;
793 case NFS4_OPEN_CLAIM_FH:
794 return NFS4_OPEN_CLAIM_NULL;
795 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
796 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
797 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
798 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
799 }
800}
2ced46c2
TM		 801
802static void nfs4_init_opendata_res(struct nfs4_opendata *p)
803{
804 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 805 p->o_res.seqid = p->o_arg.seqid;
806 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 807 p->o_res.server = p->o_arg.server;
5f657530 808 p->o_res.access_request = p->o_arg.access;
2ced46c2 809 nfs_fattr_init(&p->f_attr);
6926afd1 810 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 811}
812
82a2c1b7 813static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 814 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 815 const struct iattr *attrs,
4a1c0893 816 enum open_claim_type4 claim,
8535b2be 817 gfp_t gfp_mask)
e56e0b78 818{
82a2c1b7 819 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 820 struct inode *dir = parent->d_inode;
821 struct nfs_server *server = NFS_SERVER(dir);
822 struct nfs4_opendata *p;
823
8535b2be 824 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 825 if (p == NULL)
826 goto err;
8535b2be 827 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 828 if (p->o_arg.seqid == NULL)
829 goto err_free;
82a2c1b7
AV		 830 nfs_sb_active(dentry->d_sb);
831 p->dentry = dget(dentry);
e56e0b78
TM		 832 p->dir = parent;
833 p->owner = sp;
834 atomic_inc(&sp->so_count);
dc0b027d
TM		 835 p->o_arg.open_flags = flags;
836 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 837 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
838 * will return permission denied for all bits until close */
839 if (!(flags & O_EXCL)) {
840 /* ask server to check for all possible rights as results
841 * are cached */
842 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
843 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 844 }
7539bbab 845 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 846 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
847 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 848 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 849 p->o_arg.server = server;
850 p->o_arg.bitmask = server->attr_bitmask;
1549210f 851 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
49f9a0fa
TM		 852 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
853 switch (p->o_arg.claim) {
4a1c0893
TM		 854 case NFS4_OPEN_CLAIM_NULL:
855 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
856 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
857 p->o_arg.fh = NFS_FH(dir);
858 break;
859 case NFS4_OPEN_CLAIM_PREVIOUS:
860 case NFS4_OPEN_CLAIM_FH:
861 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
862 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
863 p->o_arg.fh = NFS_FH(dentry->d_inode);
864 }
536e43d1 865 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 866 __be32 verf[2];
d77d76ff 867
e56e0b78
TM		 868 p->o_arg.u.attrs = &p->attrs;
869 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 870
871 verf[0] = jiffies;
872 verf[1] = current->pid;
873 memcpy(p->o_arg.u.verifier.data, verf,
874 sizeof(p->o_arg.u.verifier.data));
e56e0b78 875 }
cdd4e68b
TM		 876 p->c_arg.fh = &p->o_res.fh;
877 p->c_arg.stateid = &p->o_res.stateid;
878 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 879 nfs4_init_opendata_res(p);
c6d00e63 880 kref_init(&p->kref);
e56e0b78
TM		 881 return p;
882err_free:
883 kfree(p);
884err:
885 dput(parent);
886 return NULL;
887}
888
c6d00e63 889static void nfs4_opendata_free(struct kref *kref)
e56e0b78 890{
c6d00e63
TM		 891 struct nfs4_opendata *p = container_of(kref,
892 struct nfs4_opendata, kref);
82a2c1b7 893 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 894
895 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 896 if (p->state != NULL)
897 nfs4_put_open_state(p->state);
c6d00e63
TM		 898 nfs4_put_state_owner(p->owner);
899 dput(p->dir);
82a2c1b7
AV		 900 dput(p->dentry);
901 nfs_sb_deactive(sb);
6926afd1 902 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 903 kfree(p);
904}
905
906static void nfs4_opendata_put(struct nfs4_opendata *p)
907{
908 if (p != NULL)
909 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 910}
911
06f814a3
TM		 912static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
913{
06f814a3
TM		 914 int ret;
915
06f814a3 916 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 917 return ret;
918}
919
dc0b027d 920static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 921{
922 int ret = 0;
dc0b027d 923
536e43d1 924 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 925 goto out;
926 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 927 case FMODE_READ:
88069f77
TM		 928 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
929 && state->n_rdonly != 0;
6ee41268
TM		 930 break;
931 case FMODE_WRITE:
88069f77
TM		 932 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
933 && state->n_wronly != 0;
6ee41268
TM		 934 break;
935 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 936 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
937 && state->n_rdwr != 0;
6ee41268 938 }
dc0b027d 939out:
6ee41268
TM		 940 return ret;
941}
942
dc0b027d 943static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 944{
652f89f6
TM		 945 if (delegation == NULL)
946 return 0;
dc0b027d 947 if ((delegation->type & fmode) != fmode)
aac00a8d 948 return 0;
15c831bf 949 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 950 return 0;
d25be546
TM		 951 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
952 return 0;
b7391f44 953 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 954 return 1;
955}
956
dc0b027d 957static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 958{
dc0b027d 959 switch (fmode) {
e7616923
TM		 960 case FMODE_WRITE:
961 state->n_wronly++;
962 break;
963 case FMODE_READ:
964 state->n_rdonly++;
965 break;
966 case FMODE_READ|FMODE_WRITE:
967 state->n_rdwr++;
968 }
dc0b027d 969 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 970}
971
dc0b027d 972static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 973{
974 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 975 nfs4_stateid_copy(&state->stateid, stateid);
976 nfs4_stateid_copy(&state->open_stateid, stateid);
dc0b027d 977 switch (fmode) {
003707c7
TM		 978 case FMODE_READ:
979 set_bit(NFS_O_RDONLY_STATE, &state->flags);
980 break;
981 case FMODE_WRITE:
982 set_bit(NFS_O_WRONLY_STATE, &state->flags);
983 break;
984 case FMODE_READ|FMODE_WRITE:
985 set_bit(NFS_O_RDWR_STATE, &state->flags);
986 }
e7616923
TM		 987}
988
dc0b027d 989static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 990{
8bda4e4c 991 write_seqlock(&state->seqlock);
dc0b027d 992 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 993 write_sequnlock(&state->seqlock);
003707c7
TM		 994}
995
dc0b027d 996static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 997{
8bda4e4c
TM		 998 /*
999 * Protect the call to nfs4_state_set_mode_locked and
1000 * serialise the stateid update
1001 */
1002 write_seqlock(&state->seqlock);
003707c7 1003 if (deleg_stateid != NULL) {
f597c537 1004 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1005 set_bit(NFS_DELEGATED_STATE, &state->flags);
1006 }
1007 if (open_stateid != NULL)
dc0b027d 1008 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1009 write_sequnlock(&state->seqlock);
1010 spin_lock(&state->owner->so_lock);
dc0b027d 1011 update_open_stateflags(state, fmode);
ec073428 1012 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1013}
1014
dc0b027d 1015static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1016{
1017 struct nfs_inode *nfsi = NFS_I(state->inode);
1018 struct nfs_delegation *deleg_cur;
1019 int ret = 0;
1020
dc0b027d 1021 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1022
1023 rcu_read_lock();
1024 deleg_cur = rcu_dereference(nfsi->delegation);
1025 if (deleg_cur == NULL)
1026 goto no_delegation;
1027
1028 spin_lock(&deleg_cur->lock);
1029 if (nfsi->delegation != deleg_cur ||
d25be546 1030 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1031 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1032 goto no_delegation_unlock;
1033
1034 if (delegation == NULL)
1035 delegation = &deleg_cur->stateid;
f597c537 1036 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1037 goto no_delegation_unlock;
1038
b7391f44 1039 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1040 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1041 ret = 1;
1042no_delegation_unlock:
1043 spin_unlock(&deleg_cur->lock);
1044no_delegation:
1045 rcu_read_unlock();
1046
1047 if (!ret && open_stateid != NULL) {
dc0b027d 1048 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1049 ret = 1;
1050 }
1051
1052 return ret;
1053}
1054
1055
dc0b027d 1056static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1057{
1058 struct nfs_delegation *delegation;
1059
1060 rcu_read_lock();
1061 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1062 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1063 rcu_read_unlock();
1064 return;
1065 }
1066 rcu_read_unlock();
57ec14c5 1067 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1068}
1069
6ee41268 1070static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1071{
1072 struct nfs4_state *state = opendata->state;
1073 struct nfs_inode *nfsi = NFS_I(state->inode);
1074 struct nfs_delegation *delegation;
536e43d1 1075 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1076 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1077 nfs4_stateid stateid;
1078 int ret = -EAGAIN;
1079
aac00a8d 1080 for (;;) {
dc0b027d 1081 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1082 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1083 if (can_open_cached(state, fmode, open_mode)) {
1084 update_open_stateflags(state, fmode);
6ee41268 1085 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1086 goto out_return_state;
1087 }
1088 spin_unlock(&state->owner->so_lock);
1089 }
34310430
TM		 1090 rcu_read_lock();
1091 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1092 if (!can_open_delegated(delegation, fmode)) {
34310430 1093 rcu_read_unlock();
aac00a8d 1094 break;
34310430 1095 }
aac00a8d 1096 /* Save the delegation */
f597c537 1097 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1098 rcu_read_unlock();
af22f94a 1099 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1100 if (ret != 0)
1101 goto out;
1102 ret = -EAGAIN;
34310430
TM		 1103
1104 /* Try to update the stateid using the delegation */
dc0b027d 1105 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1106 goto out_return_state;
aac00a8d 1107 }
aac00a8d
TM		 1108out:
1109 return ERR_PTR(ret);
1110out_return_state:
1111 atomic_inc(&state->count);
1112 return state;
1113}
1114
e23008ec
AA		 1115static void
1116nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1117{
1118 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1119 struct nfs_delegation *delegation;
1120 int delegation_flags = 0;
1121
1122 rcu_read_lock();
1123 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1124 if (delegation)
1125 delegation_flags = delegation->flags;
1126 rcu_read_unlock();
1127 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1128 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1129 "returning a delegation for "
1130 "OPEN(CLAIM_DELEGATE_CUR)\n",
1131 clp->cl_hostname);
1132 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1133 nfs_inode_set_delegation(state->inode,
1134 data->owner->so_cred,
1135 &data->o_res);
1136 else
1137 nfs_inode_reclaim_delegation(state->inode,
1138 data->owner->so_cred,
1139 &data->o_res);
1140}
1141
1142/*
1143 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1144 * and update the nfs4_state.
1145 */
1146static struct nfs4_state *
1147_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1148{
1149 struct inode *inode = data->state->inode;
1150 struct nfs4_state *state = data->state;
1151 int ret;
1152
1153 if (!data->rpc_done) {
1154 ret = data->rpc_status;
1155 goto err;
1156 }
1157
1158 ret = -ESTALE;
1159 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1160 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1161 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1162 goto err;
1163
1164 ret = -ENOMEM;
1165 state = nfs4_get_open_state(inode, data->owner);
1166 if (state == NULL)
1167 goto err;
1168
1169 ret = nfs_refresh_inode(inode, &data->f_attr);
1170 if (ret)
1171 goto err;
1172
1173 if (data->o_res.delegation_type != 0)
1174 nfs4_opendata_check_deleg(data, state);
1175 update_open_stateid(state, &data->o_res.stateid, NULL,
1176 data->o_arg.fmode);
1177
1178 return state;
1179err:
1180 return ERR_PTR(ret);
1181
1182}
1183
1184static struct nfs4_state *
1185_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1186{
1187 struct inode *inode;
1188 struct nfs4_state *state = NULL;
1b370bc2 1189 int ret;
24ac23ab 1190
aac00a8d 1191 if (!data->rpc_done) {
6ee41268 1192 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1193 goto out;
1194 }
1195
1b370bc2 1196 ret = -EAGAIN;
24ac23ab 1197 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1198 goto err;
24ac23ab 1199 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1200 ret = PTR_ERR(inode);
03f28e3a 1201 if (IS_ERR(inode))
1b370bc2
TM		 1202 goto err;
1203 ret = -ENOMEM;
24ac23ab
TM		 1204 state = nfs4_get_open_state(inode, data->owner);
1205 if (state == NULL)
1b370bc2 1206 goto err_put_inode;
e23008ec
AA		 1207 if (data->o_res.delegation_type != 0)
1208 nfs4_opendata_check_deleg(data, state);
34310430 1209 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1210 data->o_arg.fmode);
24ac23ab 1211 iput(inode);
aac00a8d 1212out:
7aa262b5 1213 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1214 return state;
1b370bc2
TM		 1215err_put_inode:
1216 iput(inode);
1217err:
1218 return ERR_PTR(ret);
24ac23ab
TM		 1219}
1220
e23008ec
AA		 1221static struct nfs4_state *
1222nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1223{
1224 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1225 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1226 return _nfs4_opendata_to_nfs4_state(data);
1227}
1228
864472e9
TM		 1229static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1230{
1231 struct nfs_inode *nfsi = NFS_I(state->inode);
1232 struct nfs_open_context *ctx;
1233
1234 spin_lock(&state->inode->i_lock);
1235 list_for_each_entry(ctx, &nfsi->open_files, list) {
1236 if (ctx->state != state)
1237 continue;
1238 get_nfs_open_context(ctx);
1239 spin_unlock(&state->inode->i_lock);
1240 return ctx;
1241 }
1242 spin_unlock(&state->inode->i_lock);
1243 return ERR_PTR(-ENOENT);
1244}
1245
4a1c0893
TM		 1246static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1247 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1248{
1249 struct nfs4_opendata *opendata;
1250
4a1c0893
TM		 1251 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1252 NULL, claim, GFP_NOFS);
6f220ed5
TM		 1253 if (opendata == NULL)
1254 return ERR_PTR(-ENOMEM);
1255 opendata->state = state;
1256 atomic_inc(&state->count);
1257 return opendata;
1258}
1259
dc0b027d 1260static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1261{
2ced46c2 1262 struct nfs4_state *newstate;
864472e9
TM		 1263 int ret;
1264
dc0b027d
TM		 1265 opendata->o_arg.open_flags = 0;
1266 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1267 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1268 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1269 nfs4_init_opendata_res(opendata);
b257957e 1270 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1271 if (ret != 0)
1272 return ret;
2ced46c2 1273 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1274 if (IS_ERR(newstate))
1275 return PTR_ERR(newstate);
643168c2 1276 nfs4_close_state(newstate, fmode);
2ced46c2 1277 *res = newstate;
864472e9
TM		 1278 return 0;
1279}
1280
1281static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1282{
864472e9 1283 struct nfs4_state *newstate;
864472e9
TM		 1284 int ret;
1285
1286 /* memory barrier prior to reading state->n_* */
2ced46c2 1287 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1288 smp_rmb();
1289 if (state->n_rdwr != 0) {
b0ed9dbc 1290 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1291 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1292 if (ret != 0)
1293 return ret;
2ced46c2
TM		 1294 if (newstate != state)
1295 return -ESTALE;
864472e9
TM		 1296 }
1297 if (state->n_wronly != 0) {
b0ed9dbc 1298 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1299 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1300 if (ret != 0)
1301 return ret;
2ced46c2
TM		 1302 if (newstate != state)
1303 return -ESTALE;
864472e9
TM		 1304 }
1305 if (state->n_rdonly != 0) {
b0ed9dbc 1306 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1307 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1308 if (ret != 0)
1309 return ret;
2ced46c2
TM		 1310 if (newstate != state)
1311 return -ESTALE;
864472e9 1312 }
1ac7e2fd
TM		 1313 /*
1314 * We may have performed cached opens for all three recoveries.
1315 * Check if we need to update the current stateid.
1316 */
1317 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1318 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1319 write_seqlock(&state->seqlock);
1ac7e2fd 1320 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1321 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1322 write_sequnlock(&state->seqlock);
1ac7e2fd 1323 }
864472e9
TM		 1324 return 0;
1325}
1326
1da177e4
LT		 1327/*
1328 * OPEN_RECLAIM:
1329 * reclaim state on the server after a reboot.
1da177e4 1330 */
539cd03a 1331static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1332{
1ac7e2fd 1333 struct nfs_delegation *delegation;
864472e9 1334 struct nfs4_opendata *opendata;
dc0b027d 1335 fmode_t delegation_type = 0;
1da177e4
LT		 1336 int status;
1337
4a1c0893
TM		 1338 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1339 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1340 if (IS_ERR(opendata))
1341 return PTR_ERR(opendata);
1ac7e2fd
TM		 1342 rcu_read_lock();
1343 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1344 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1345 delegation_type = delegation->type;
1ac7e2fd 1346 rcu_read_unlock();
864472e9
TM		 1347 opendata->o_arg.u.delegation_type = delegation_type;
1348 status = nfs4_open_recover(opendata, state);
c6d00e63 1349 nfs4_opendata_put(opendata);
1da177e4
LT		 1350 return status;
1351}
1352
539cd03a 1353static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1354{
1355 struct nfs_server *server = NFS_SERVER(state->inode);
1356 struct nfs4_exception exception = { };
1357 int err;
1358 do {
539cd03a 1359 err = _nfs4_do_open_reclaim(ctx, state);
49f9a0fa
TM		 1360 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1361 continue;
168667c4 1362 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1363 break;
1364 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1365 } while (exception.retry);
1366 return err;
1367}
1368
864472e9
TM		 1369static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1370{
1371 struct nfs_open_context *ctx;
1372 int ret;
1373
1374 ctx = nfs4_state_find_open_context(state);
1375 if (IS_ERR(ctx))
91876b13 1376 return -EAGAIN;
539cd03a 1377 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1378 put_nfs_open_context(ctx);
1379 return ret;
1380}
1381
be76b5b6 1382int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1383{
be76b5b6 1384 struct nfs_server *server = NFS_SERVER(state->inode);
e56e0b78 1385 struct nfs4_opendata *opendata;
be76b5b6 1386 int err;
1da177e4 1387
4a1c0893 1388 opendata = nfs4_open_recoverdata_alloc(ctx, state,
ccb46e20 1389 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
6f220ed5
TM		 1390 if (IS_ERR(opendata))
1391 return PTR_ERR(opendata);
f597c537 1392 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
be76b5b6 1393 err = nfs4_open_recover(opendata, state);
c6d00e63 1394 nfs4_opendata_put(opendata);
be76b5b6
TM		 1395 switch (err) {
1396 default:
1397 printk(KERN_ERR "NFS: %s: unhandled error "
1398 "%d.\n", __func__, err);
1399 case 0:
1400 case -ENOENT:
1401 case -ESTALE:
1402 break;
1403 case -NFS4ERR_BADSESSION:
1404 case -NFS4ERR_BADSLOT:
1405 case -NFS4ERR_BAD_HIGH_SLOT:
1406 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1407 case -NFS4ERR_DEADSESSION:
1408 set_bit(NFS_DELEGATED_STATE, &state->flags);
1409 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1410 return -EAGAIN;
1411 case -NFS4ERR_STALE_CLIENTID:
1412 case -NFS4ERR_STALE_STATEID:
1413 set_bit(NFS_DELEGATED_STATE, &state->flags);
1414 case -NFS4ERR_EXPIRED:
1415 /* Don't recall a delegation if it was lost */
1416 nfs4_schedule_lease_recovery(server->nfs_client);
1417 return -EAGAIN;
1418 case -NFS4ERR_DELEG_REVOKED:
1419 case -NFS4ERR_ADMIN_REVOKED:
1420 case -NFS4ERR_BAD_STATEID:
1421 nfs_inode_find_state_and_recover(state->inode,
1422 stateid);
1423 nfs4_schedule_stateid_recovery(server, state);
1424 case -ENOMEM:
1425 return 0;
1426 case -NFS4ERR_DELAY:
1427 case -NFS4ERR_GRACE:
1428 set_bit(NFS_DELEGATED_STATE, &state->flags);
1429 ssleep(1);
1430 return -EAGAIN;
1431 }
1da177e4
LT		 1432 return err;
1433}
1434
cdd4e68b
TM		 1435static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1436{
1437 struct nfs4_opendata *data = calldata;
1438
1439 data->rpc_status = task->tk_status;
26e976a8 1440 if (data->rpc_status == 0) {
f597c537 1441 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1442 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1443 renew_lease(data->o_res.server, data->timestamp);
3e309914 1444 data->rpc_done = 1;
26e976a8 1445 }
cdd4e68b
TM		 1446}
1447
1448static void nfs4_open_confirm_release(void *calldata)
1449{
1450 struct nfs4_opendata *data = calldata;
1451 struct nfs4_state *state = NULL;
1452
1453 /* If this request hasn't been cancelled, do nothing */
1454 if (data->cancelled == 0)
1455 goto out_free;
1456 /* In case of error, no cleanup! */
3e309914 1457 if (!data->rpc_done)
cdd4e68b 1458 goto out_free;
cdd4e68b 1459 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1460 if (!IS_ERR(state))
643168c2 1461 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1462out_free:
c6d00e63 1463 nfs4_opendata_put(data);
cdd4e68b
TM		 1464}
1465
1466static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1467 .rpc_call_done = nfs4_open_confirm_done,
1468 .rpc_release = nfs4_open_confirm_release,
1469};
1470
1471/*
1472 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1473 */
1474static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1475{
1476 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1477 struct rpc_task *task;
5138fde0
TM		 1478 struct rpc_message msg = {
1479 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1480 .rpc_argp = &data->c_arg,
1481 .rpc_resp = &data->c_res,
1482 .rpc_cred = data->owner->so_cred,
1483 };
c970aa85
TM		 1484 struct rpc_task_setup task_setup_data = {
1485 .rpc_client = server->client,
5138fde0 1486 .rpc_message = &msg,
c970aa85
TM		 1487 .callback_ops = &nfs4_open_confirm_ops,
1488 .callback_data = data,
101070ca 1489 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1490 .flags = RPC_TASK_ASYNC,
1491 };
1da177e4
LT		 1492 int status;
1493
c6d00e63 1494 kref_get(&data->kref);
3e309914
TM		 1495 data->rpc_done = 0;
1496 data->rpc_status = 0;
5138fde0 1497 data->timestamp = jiffies;
c970aa85 1498 task = rpc_run_task(&task_setup_data);
7a1218a2 1499 if (IS_ERR(task))
cdd4e68b 1500 return PTR_ERR(task);
cdd4e68b
TM		 1501 status = nfs4_wait_for_completion_rpc_task(task);
1502 if (status != 0) {
1503 data->cancelled = 1;
1504 smp_wmb();
1505 } else
1506 status = data->rpc_status;
e6b3c4db 1507 rpc_put_task(task);
1da177e4
LT		 1508 return status;
1509}
1510
24ac23ab 1511static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1512{
24ac23ab
TM		 1513 struct nfs4_opendata *data = calldata;
1514 struct nfs4_state_owner *sp = data->owner;
5138fde0 1515
24ac23ab 1516 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1517 goto out_wait;
aac00a8d
TM		 1518 /*
1519 * Check if we still need to send an OPEN call, or if we can use
1520 * a delegation instead.
1521 */
1522 if (data->state != NULL) {
1523 struct nfs_delegation *delegation;
1524
dc0b027d 1525 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1526 goto out_no_action;
aac00a8d
TM		 1527 rcu_read_lock();
1528 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1529 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1530 can_open_delegated(delegation, data->o_arg.fmode))
1531 goto unlock_no_action;
aac00a8d
TM		 1532 rcu_read_unlock();
1533 }
95b72eb0 1534 /* Update client id. */
1f0e890d 1535 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1536 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1537 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
e23008ec 1538 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
6f220ed5
TM		 1539 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1540 }
26e976a8 1541 data->timestamp = jiffies;
035168ab 1542 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1543 &data->o_arg.seq_args,
2240a9e2
TM		 1544 &data->o_res.seq_res,
1545 task) != 0)
1546 nfs_release_seqid(data->o_arg.seqid);
6ee41268 1547 return;
652f89f6
TM		 1548unlock_no_action:
1549 rcu_read_unlock();
6ee41268
TM		 1550out_no_action:
1551 task->tk_action = NULL;
c8da19b9 1552out_wait:
b75ad4cd 1553 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1554}
1555
24ac23ab
TM		 1556static void nfs4_open_done(struct rpc_task *task, void *calldata)
1557{
1558 struct nfs4_opendata *data = calldata;
1da177e4 1559
24ac23ab 1560 data->rpc_status = task->tk_status;
d898528c 1561
14516c3a
TM		 1562 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1563 return;
d898528c 1564
24ac23ab 1565 if (task->tk_status == 0) {
807d66d8
TM		 1566 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1567 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1568 case S_IFREG:
1569 break;
1570 case S_IFLNK:
24ac23ab 1571 data->rpc_status = -ELOOP;
6f926b5b
TM		 1572 break;
1573 case S_IFDIR:
24ac23ab 1574 data->rpc_status = -EISDIR;
6f926b5b
TM		 1575 break;
1576 default:
24ac23ab 1577 data->rpc_status = -ENOTDIR;
807d66d8 1578 }
6f926b5b 1579 }
26e976a8 1580 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1581 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1582 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1583 }
3e309914 1584 data->rpc_done = 1;
24ac23ab 1585}
6f926b5b 1586
24ac23ab
TM		 1587static void nfs4_open_release(void *calldata)
1588{
1589 struct nfs4_opendata *data = calldata;
1590 struct nfs4_state *state = NULL;
1591
1592 /* If this request hasn't been cancelled, do nothing */
1593 if (data->cancelled == 0)
1594 goto out_free;
1595 /* In case of error, no cleanup! */
3e309914 1596 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1597 goto out_free;
1598 /* In case we need an open_confirm, no cleanup! */
1599 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1600 goto out_free;
24ac23ab 1601 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1602 if (!IS_ERR(state))
643168c2 1603 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1604out_free:
c6d00e63 1605 nfs4_opendata_put(data);
24ac23ab
TM		 1606}
1607
1608static const struct rpc_call_ops nfs4_open_ops = {
1609 .rpc_call_prepare = nfs4_open_prepare,
1610 .rpc_call_done = nfs4_open_done,
1611 .rpc_release = nfs4_open_release,
1612};
1613
b257957e 1614static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1615{
1616 struct inode *dir = data->dir->d_inode;
1617 struct nfs_server *server = NFS_SERVER(dir);
1618 struct nfs_openargs *o_arg = &data->o_arg;
1619 struct nfs_openres *o_res = &data->o_res;
1620 struct rpc_task *task;
5138fde0
TM		 1621 struct rpc_message msg = {
1622 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1623 .rpc_argp = o_arg,
1624 .rpc_resp = o_res,
1625 .rpc_cred = data->owner->so_cred,
1626 };
c970aa85
TM		 1627 struct rpc_task_setup task_setup_data = {
1628 .rpc_client = server->client,
5138fde0 1629 .rpc_message = &msg,
c970aa85
TM		 1630 .callback_ops = &nfs4_open_ops,
1631 .callback_data = data,
101070ca 1632 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1633 .flags = RPC_TASK_ASYNC,
1634 };
24ac23ab
TM		 1635 int status;
1636
9d12b216 1637 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1638 kref_get(&data->kref);
3e309914
TM		 1639 data->rpc_done = 0;
1640 data->rpc_status = 0;
2ced46c2 1641 data->cancelled = 0;
b257957e 1642 if (isrecover)
8fe72bac 1643 nfs4_set_sequence_privileged(&o_arg->seq_args);
c970aa85 1644 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1645 if (IS_ERR(task))
1646 return PTR_ERR(task);
1647 status = nfs4_wait_for_completion_rpc_task(task);
1648 if (status != 0) {
1649 data->cancelled = 1;
1650 smp_wmb();
1651 } else
1652 status = data->rpc_status;
1653 rpc_put_task(task);
1654
1655 return status;
1656}
1657
1658static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1659{
1660 struct inode *dir = data->dir->d_inode;
1661 struct nfs_openres *o_res = &data->o_res;
1662 int status;
1663
1664 status = nfs4_run_open_task(data, 1);
1665 if (status != 0 || !data->rpc_done)
1666 return status;
1667
6926afd1
TM		 1668 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1669
b257957e
AB		 1670 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1671 status = _nfs4_proc_open_confirm(data);
1672 if (status != 0)
1673 return status;
1674 }
1675
1676 return status;
1677}
1678
6168f62c
WAA		 1679static int nfs4_opendata_access(struct rpc_cred *cred,
1680 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1681 struct nfs4_state *state, fmode_t fmode,
1682 int openflags)
6168f62c
WAA		 1683{
1684 struct nfs_access_entry cache;
1685 u32 mask;
1686
1687 /* access call failed or for some reason the server doesn't
1688 * support any access modes -- defer access call until later */
1689 if (opendata->o_res.access_supported == 0)
1690 return 0;
1691
1692 mask = 0;
bbd3a8ee 1693 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1694 * write mode bits, but POSIX allows the creating process to write.
1695 * use openflags to check for exec, because fmode won't
1696 * always have FMODE_EXEC set when file open for exec. */
1697 if (openflags & __FMODE_EXEC) {
1698 /* ONLY check for exec rights */
1699 mask = MAY_EXEC;
1700 } else if (fmode & FMODE_READ)
1701 mask = MAY_READ;
6168f62c
WAA		 1702
1703 cache.cred = cred;
1704 cache.jiffies = jiffies;
1705 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1706 nfs_access_add_cache(state->inode, &cache);
1707
bbd3a8ee 1708 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1709 return 0;
1710
1711 /* even though OPEN succeeded, access is denied. Close the file */
1712 nfs4_close_state(state, fmode);
998f40b5 1713 return -EACCES;
6168f62c
WAA		 1714}
1715
b257957e
AB		 1716/*
1717 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1718 */
1719static int _nfs4_proc_open(struct nfs4_opendata *data)
1720{
1721 struct inode *dir = data->dir->d_inode;
1722 struct nfs_server *server = NFS_SERVER(dir);
1723 struct nfs_openargs *o_arg = &data->o_arg;
1724 struct nfs_openres *o_res = &data->o_res;
1725 int status;
1726
1727 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1728 if (!data->rpc_done)
1729 return status;
1730 if (status != 0) {
1731 if (status == -NFS4ERR_BADNAME &&
1732 !(o_arg->open_flags & O_CREAT))
1733 return -ENOENT;
24ac23ab 1734 return status;
08ef7bd3 1735 }
24ac23ab 1736
6926afd1
TM		 1737 nfs_fattr_map_and_free_names(server, &data->f_attr);
1738
90ff0c54 1739 if (o_arg->open_flags & O_CREAT)
56ae19f3 1740 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1741 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1742 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1743 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1744 status = _nfs4_proc_open_confirm(data);
1da177e4 1745 if (status != 0)
24ac23ab 1746 return status;
1da177e4
LT		 1747 }
1748 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1749 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1750 return 0;
1da177e4
LT		 1751}
1752
d83217c1
AA		 1753static int nfs4_recover_expired_lease(struct nfs_server *server)
1754{
1755 return nfs4_client_recover_expired_lease(server->nfs_client);
1756}
1757
1da177e4
LT		 1758/*
1759 * OPEN_EXPIRED:
1760 * reclaim state on the server after a network partition.
1761 * Assumes caller holds the appropriate lock
1762 */
539cd03a 1763static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1764{
e56e0b78 1765 struct nfs4_opendata *opendata;
864472e9 1766 int ret;
1da177e4 1767
4a1c0893 1768 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1769 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1770 if (IS_ERR(opendata))
1771 return PTR_ERR(opendata);
864472e9 1772 ret = nfs4_open_recover(opendata, state);
35d05778 1773 if (ret == -ESTALE)
3d4ff43d 1774 d_drop(ctx->dentry);
c6d00e63 1775 nfs4_opendata_put(opendata);
864472e9 1776 return ret;
1da177e4
LT		 1777}
1778
a9ed2e25 1779static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1780{
539cd03a 1781 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1782 struct nfs4_exception exception = { };
1783 int err;
1784
1785 do {
539cd03a 1786 err = _nfs4_open_expired(ctx, state);
49f9a0fa
TM		 1787 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1788 continue;
a9ed2e25
TM		 1789 switch (err) {
1790 default:
1791 goto out;
1792 case -NFS4ERR_GRACE:
1793 case -NFS4ERR_DELAY:
1794 nfs4_handle_exception(server, err, &exception);
1795 err = 0;
1796 }
202b50dc 1797 } while (exception.retry);
a9ed2e25 1798out:
202b50dc
TM		 1799 return err;
1800}
1801
1da177e4
LT		 1802static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1803{
1da177e4 1804 struct nfs_open_context *ctx;
864472e9 1805 int ret;
1da177e4 1806
864472e9
TM		 1807 ctx = nfs4_state_find_open_context(state);
1808 if (IS_ERR(ctx))
91876b13 1809 return -EAGAIN;
539cd03a 1810 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1811 put_nfs_open_context(ctx);
1812 return ret;
1da177e4
LT		 1813}
1814
f062eb6c 1815#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1816static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1817{
f062eb6c 1818 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1819 nfs4_stateid *stateid = &state->stateid;
1820 int status;
1821
1822 /* If a state reset has been done, test_stateid is unneeded */
1823 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1824 return;
1825
1826 status = nfs41_test_stateid(server, stateid);
1827 if (status != NFS_OK) {
1828 /* Free the stateid unless the server explicitly
1829 * informs us the stateid is unrecognized. */
1830 if (status != -NFS4ERR_BAD_STATEID)
1831 nfs41_free_stateid(server, stateid);
6938867e 1832 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1833
6938867e
BS		 1834 write_seqlock(&state->seqlock);
1835 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1836 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1837 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1838 }
1839}
1840
1841/**
1842 * nfs41_check_open_stateid - possibly free an open stateid
1843 *
1844 * @state: NFSv4 state for an inode
1845 *
1846 * Returns NFS_OK if recovery for this stateid is now finished.
1847 * Otherwise a negative NFS4ERR value is returned.
1848 */
1849static int nfs41_check_open_stateid(struct nfs4_state *state)
1850{
1851 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1852 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1853 int status;
1854
1855 /* If a state reset has been done, test_stateid is unneeded */
1856 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1857 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1858 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1859 return -NFS4ERR_BAD_STATEID;
1860
1861 status = nfs41_test_stateid(server, stateid);
1862 if (status != NFS_OK) {
1863 /* Free the stateid unless the server explicitly
1864 * informs us the stateid is unrecognized. */
1865 if (status != -NFS4ERR_BAD_STATEID)
1866 nfs41_free_stateid(server, stateid);
1867
1868 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1869 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1870 clear_bit(NFS_O_RDWR_STATE, &state->flags);
b01dd1d8
BS		 1871 }
1872 return status;
1873}
1874
1875static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1876{
eb64cf96 1877 int status;
b01dd1d8 1878
3e60ffdd
CL		 1879 nfs41_clear_delegation_stateid(state);
1880 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1881 if (status != NFS_OK)
1882 status = nfs4_open_expired(sp, state);
1883 return status;
f062eb6c
BS		 1884}
1885#endif
1886
aa53ed54
JL		 1887/*
1888 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1889 * fields corresponding to attributes that were used to store the verifier.
1890 * Make sure we clobber those fields in the later setattr call
1891 */
1892static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1893{
1894 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1895 !(sattr->ia_valid & ATTR_ATIME_SET))
1896 sattr->ia_valid |= ATTR_ATIME;
1897
1898 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1899 !(sattr->ia_valid & ATTR_MTIME_SET))
1900 sattr->ia_valid |= ATTR_MTIME;
1901}
1902
c21443c2
TM		 1903static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1904 fmode_t fmode,
1905 int flags,
1906 struct nfs4_state **res)
1907{
1908 struct nfs4_state_owner *sp = opendata->owner;
1909 struct nfs_server *server = sp->so_server;
1910 struct nfs4_state *state;
1911 unsigned int seq;
1912 int ret;
1913
1914 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1915
1916 ret = _nfs4_proc_open(opendata);
1917 if (ret != 0)
1918 goto out;
1919
1920 state = nfs4_opendata_to_nfs4_state(opendata);
1921 ret = PTR_ERR(state);
1922 if (IS_ERR(state))
1923 goto out;
1924 if (server->caps & NFS_CAP_POSIX_LOCK)
1925 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1926
1927 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1928 if (ret != 0)
1929 goto out;
1930
91876b13 1931 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
c21443c2 1932 nfs4_schedule_stateid_recovery(server, state);
c21443c2
TM		 1933 *res = state;
1934out:
1935 return ret;
1936}
1937
1da177e4 1938/*
24ac23ab 1939 * Returns a referenced nfs4_state
1da177e4 1940 */
82be417a
AA		 1941static int _nfs4_do_open(struct inode *dir,
1942 struct dentry *dentry,
1943 fmode_t fmode,
1944 int flags,
1945 struct iattr *sattr,
1946 struct rpc_cred *cred,
1947 struct nfs4_state **res,
1948 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1949{
1950 struct nfs4_state_owner *sp;
1951 struct nfs4_state *state = NULL;
1952 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1953 struct nfs4_opendata *opendata;
49f9a0fa 1954 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
aac00a8d 1955 int status;
1da177e4
LT		 1956
1957 /* Protect against reboot recovery conflicts */
1da177e4 1958 status = -ENOMEM;
d1e284d5
TM		 1959 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1960 if (sp == NULL) {
1da177e4
LT		 1961 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1962 goto out_err;
1963 }
58d9714a
TM		 1964 status = nfs4_recover_expired_lease(server);
1965 if (status != 0)
b4454fe1 1966 goto err_put_state_owner;
82a2c1b7
AV		 1967 if (dentry->d_inode != NULL)
1968 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1969 status = -ENOMEM;
49f9a0fa
TM		 1970 if (dentry->d_inode)
1971 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 1972 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
49f9a0fa 1973 claim, GFP_KERNEL);
e56e0b78 1974 if (opendata == NULL)
95d35cb4 1975 goto err_put_state_owner;
1da177e4 1976
82be417a
AA		 1977 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1978 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1979 if (!opendata->f_attr.mdsthreshold)
1980 goto err_opendata_put;
1549210f 1981 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 1982 }
82a2c1b7
AV		 1983 if (dentry->d_inode != NULL)
1984 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1985
c21443c2 1986 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
6168f62c
WAA		 1987 if (status != 0)
1988 goto err_opendata_put;
1989
0ab64e0e
TM		 1990 if (opendata->o_arg.open_flags & O_EXCL) {
1991 nfs4_exclusive_attrset(opendata, sattr);
1992
1993 nfs_fattr_init(opendata->o_res.f_attr);
1994 status = nfs4_do_setattr(state->inode, cred,
1995 opendata->o_res.f_attr, sattr,
1996 state);
1997 if (status == 0)
1998 nfs_setattr_update_inode(state->inode, sattr);
1999 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2000 }
82be417a
AA		 2001
2002 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2003 *ctx_th = opendata->f_attr.mdsthreshold;
2004 else
2005 kfree(opendata->f_attr.mdsthreshold);
2006 opendata->f_attr.mdsthreshold = NULL;
2007
c6d00e63 2008 nfs4_opendata_put(opendata);
1da177e4 2009 nfs4_put_state_owner(sp);
1da177e4
LT		 2010 *res = state;
2011 return 0;
c6d00e63 2012err_opendata_put:
82be417a 2013 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2014 nfs4_opendata_put(opendata);
e56e0b78
TM		 2015err_put_state_owner:
2016 nfs4_put_state_owner(sp);
1da177e4 2017out_err:
1da177e4
LT		 2018 *res = NULL;
2019 return status;
2020}
2021
2022
82be417a
AA		 2023static struct nfs4_state *nfs4_do_open(struct inode *dir,
2024 struct dentry *dentry,
2025 fmode_t fmode,
2026 int flags,
2027 struct iattr *sattr,
2028 struct rpc_cred *cred,
2029 struct nfs4_threshold **ctx_th)
1da177e4 2030{
49f9a0fa 2031 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2032 struct nfs4_exception exception = { };
2033 struct nfs4_state *res;
2034 int status;
2035
6168f62c 2036 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 2037 do {
82be417a
AA		 2038 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
2039 &res, ctx_th);
1da177e4
LT		 2040 if (status == 0)
2041 break;
2042 /* NOTE: BAD_SEQID means the server and client disagree about the
2043 * book-keeping w.r.t. state-changing operations
2044 * (OPEN/CLOSE/LOCK/LOCKU...)
2045 * It is actually a sign of a bug on the client or on the server.
2046 *
2047 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2048 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2049 * have unhashed the old state_owner for us, and that we can
2050 * therefore safely retry using a new one. We should still warn
2051 * the user though...
2052 */
2053 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2054 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2055 " returned a bad sequence-id error!\n",
2056 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2057 exception.retry = 1;
2058 continue;
2059 }
550f5747
TM		 2060 /*
2061 * BAD_STATEID on OPEN means that the server cancelled our
2062 * state before it received the OPEN_CONFIRM.
2063 * Recover by retrying the request as per the discussion
2064 * on Page 181 of RFC3530.
2065 */
2066 if (status == -NFS4ERR_BAD_STATEID) {
2067 exception.retry = 1;
2068 continue;
2069 }
aac00a8d
TM		 2070 if (status == -EAGAIN) {
2071 /* We must have found a delegation */
2072 exception.retry = 1;
2073 continue;
2074 }
49f9a0fa
TM		 2075 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2076 continue;
2077 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2078 status, &exception));
2079 } while (exception.retry);
2080 return res;
2081}
2082
659bfcd6
TM		 2083static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2084 struct nfs_fattr *fattr, struct iattr *sattr,
2085 struct nfs4_state *state)
1da177e4 2086{
3e4f6290 2087 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2088 struct nfs_setattrargs arg = {
3e4f6290 2089 .fh = NFS_FH(inode),
1da177e4
LT		 2090 .iap = sattr,
2091 .server = server,
2092 .bitmask = server->attr_bitmask,
2093 };
2094 struct nfs_setattrres res = {
2095 .fattr = fattr,
2096 .server = server,
2097 };
2098 struct rpc_message msg = {
659bfcd6
TM		 2099 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2100 .rpc_argp = &arg,
2101 .rpc_resp = &res,
2102 .rpc_cred = cred,
1da177e4 2103 };
26e976a8 2104 unsigned long timestamp = jiffies;
65e4308d 2105 int status;
1da177e4 2106
0e574af1 2107 nfs_fattr_init(fattr);
1da177e4 2108
5d422301 2109 if (state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2110 struct nfs_lockowner lockowner = {
2111 .l_owner = current->files,
2112 .l_pid = current->tgid,
2113 };
4fc8796d 2114 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2115 &lockowner);
4fc8796d
TM		 2116 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2117 FMODE_WRITE)) {
3e4f6290 2118 /* Use that stateid */
08e9eac4 2119 } else
f597c537 2120 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2121
7c513058 2122 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2123 if (status == 0 && state != NULL)
2124 renew_lease(server, timestamp);
65e4308d 2125 return status;
1da177e4
LT		 2126}
2127
659bfcd6
TM		 2128static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2129 struct nfs_fattr *fattr, struct iattr *sattr,
2130 struct nfs4_state *state)
1da177e4 2131{
3e4f6290 2132 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2133 struct nfs4_exception exception = {
2134 .state = state,
3114ea7a 2135 .inode = inode,
a1d0b5ee 2136 };
1da177e4
LT		 2137 int err;
2138 do {
451146be
TM		 2139 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2140 switch (err) {
2141 case -NFS4ERR_OPENMODE:
2142 if (state && !(state->state & FMODE_WRITE)) {
2143 err = -EBADF;
2144 if (sattr->ia_valid & ATTR_OPEN)
2145 err = -EACCES;
2146 goto out;
2147 }
2148 }
2149 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2150 } while (exception.retry);
451146be 2151out:
1da177e4
LT		 2152 return err;
2153}
2154
2155struct nfs4_closedata {
2156 struct inode *inode;
2157 struct nfs4_state *state;
2158 struct nfs_closeargs arg;
2159 struct nfs_closeres res;
516a6af6 2160 struct nfs_fattr fattr;
26e976a8 2161 unsigned long timestamp;
f7e8917a
FI		 2162 bool roc;
2163 u32 roc_barrier;
1da177e4
LT		 2164};
2165
963d8fe5 2166static void nfs4_free_closedata(void *data)
9512135d 2167{
963d8fe5
TM		 2168 struct nfs4_closedata *calldata = data;
2169 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2170 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2171
f7e8917a
FI		 2172 if (calldata->roc)
2173 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2174 nfs4_put_open_state(calldata->state);
2175 nfs_free_seqid(calldata->arg.seqid);
9512135d 2176 nfs4_put_state_owner(sp);
322b2b90 2177 nfs_sb_deactive(sb);
9512135d
TM		 2178 kfree(calldata);
2179}
2180
88069f77
TM		 2181static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2182 fmode_t fmode)
2183{
2184 spin_lock(&state->owner->so_lock);
2185 if (!(fmode & FMODE_READ))
2186 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2187 if (!(fmode & FMODE_WRITE))
2188 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2189 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2190 spin_unlock(&state->owner->so_lock);
2191}
2192
963d8fe5 2193static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2194{
963d8fe5 2195 struct nfs4_closedata *calldata = data;
1da177e4 2196 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2197 struct nfs_server *server = NFS_SERVER(calldata->inode);
2198
a3ca5651 2199 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2200 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2201 return;
1da177e4
LT		 2202 /* hmm. we are done with the inode, and in the process of freeing
2203 * the state_owner. we keep this around to process errors
2204 */
1da177e4
LT		 2205 switch (task->tk_status) {
2206 case 0:
f7e8917a
FI		 2207 if (calldata->roc)
2208 pnfs_roc_set_barrier(state->inode,
2209 calldata->roc_barrier);
45328c35 2210 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2211 renew_lease(server, calldata->timestamp);
88069f77
TM		 2212 nfs4_close_clear_stateid_flags(state,
2213 calldata->arg.fmode);
1da177e4
LT		 2214 break;
2215 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2216 case -NFS4ERR_OLD_STATEID:
2217 case -NFS4ERR_BAD_STATEID:
1da177e4 2218 case -NFS4ERR_EXPIRED:
dc0b027d 2219 if (calldata->arg.fmode == 0)
9e33bed5 2220 break;
1da177e4 2221 default:
72211dbe
TM		 2222 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2223 rpc_restart_call_prepare(task);
1da177e4 2224 }
72211dbe 2225 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2226 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2227 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2228}
2229
4ce70ada 2230static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2231{
4ce70ada 2232 struct nfs4_closedata *calldata = data;
9512135d 2233 struct nfs4_state *state = calldata->state;
7fdab069 2234 struct inode *inode = calldata->inode;
88069f77 2235 int call_close = 0;
9512135d 2236
a3ca5651 2237 dprintk("%s: begin!\n", __func__);
963d8fe5 2238 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2239 goto out_wait;
003707c7 2240
88069f77
TM		 2241 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2242 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2243 spin_lock(&state->owner->so_lock);
003707c7 2244 /* Calculate the change in open mode */
e7616923 2245 if (state->n_rdwr == 0) {
003707c7 2246 if (state->n_rdonly == 0) {
88069f77
TM		 2247 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2248 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2249 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2250 }
2251 if (state->n_wronly == 0) {
88069f77
TM		 2252 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2253 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2254 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2255 }
e7616923 2256 }
5d422301
TM		 2257 if (!nfs4_valid_open_stateid(state))
2258 call_close = 0;
4cecb76f 2259 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2260
2261 if (!call_close) {
963d8fe5 2262 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2263 goto out_no_action;
9512135d 2264 }
88069f77 2265
f7e8917a 2266 if (calldata->arg.fmode == 0) {
88069f77 2267 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2268 if (calldata->roc &&
7fdab069 2269 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
c8da19b9 2270 goto out_wait;
f7e8917a 2271 }
88069f77 2272
516a6af6 2273 nfs_fattr_init(calldata->res.fattr);
26e976a8 2274 calldata->timestamp = jiffies;
7fdab069 2275 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2276 &calldata->arg.seq_args,
2277 &calldata->res.seq_res,
2240a9e2
TM		 2278 task) != 0)
2279 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2280 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2281 return;
2282out_no_action:
2283 task->tk_action = NULL;
2284out_wait:
2285 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2286}
2287
963d8fe5 2288static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2289 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2290 .rpc_call_done = nfs4_close_done,
2291 .rpc_release = nfs4_free_closedata,
2292};
2293
1da177e4
LT		 2294/*
2295 * It is possible for data to be read/written from a mem-mapped file
2296 * after the sys_close call (which hits the vfs layer as a flush).
2297 * This means that we can't safely call nfsv4 close on a file until
2298 * the inode is cleared. This in turn means that we are not good
2299 * NFSv4 citizens - we do not indicate to the server to update the file's
2300 * share state even when we are done with one of the three share
2301 * stateid's in the inode.
2302 *
2303 * NOTE: Caller must be holding the sp->so_owner semaphore!
2304 */
1f7977c1 2305int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2306{
4a35bd41 2307 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2308 struct nfs4_closedata *calldata;
b39e625b
TM		 2309 struct nfs4_state_owner *sp = state->owner;
2310 struct rpc_task *task;
5138fde0
TM		 2311 struct rpc_message msg = {
2312 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2313 .rpc_cred = state->owner->so_cred,
2314 };
c970aa85
TM		 2315 struct rpc_task_setup task_setup_data = {
2316 .rpc_client = server->client,
5138fde0 2317 .rpc_message = &msg,
c970aa85 2318 .callback_ops = &nfs4_close_ops,
101070ca 2319 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2320 .flags = RPC_TASK_ASYNC,
2321 };
9512135d 2322 int status = -ENOMEM;
1da177e4 2323
8535b2be 2324 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2325 if (calldata == NULL)
9512135d 2326 goto out;
9d12b216 2327 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2328 calldata->inode = state->inode;
1da177e4 2329 calldata->state = state;
4a35bd41 2330 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2331 calldata->arg.stateid = &state->open_stateid;
1da177e4 2332 /* Serialization for the sequence id */
8535b2be 2333 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2334 if (calldata->arg.seqid == NULL)
2335 goto out_free_calldata;
dc0b027d 2336 calldata->arg.fmode = 0;
a65318bf 2337 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2338 calldata->res.fattr = &calldata->fattr;
c1d51931 2339 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2340 calldata->res.server = server;
1f7977c1 2341 calldata->roc = pnfs_roc(state->inode);
643168c2 2342 nfs_sb_active(calldata->inode->i_sb);
9512135d 2343
1174dd1f
TM		 2344 msg.rpc_argp = &calldata->arg;
2345 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2346 task_setup_data.callback_data = calldata;
2347 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2348 if (IS_ERR(task))
2349 return PTR_ERR(task);
a49c3c77
TM		 2350 status = 0;
2351 if (wait)
2352 status = rpc_wait_for_completion_task(task);
b39e625b 2353 rpc_put_task(task);
a49c3c77 2354 return status;
9512135d
TM		 2355out_free_calldata:
2356 kfree(calldata);
2357out:
b39e625b
TM		 2358 nfs4_put_open_state(state);
2359 nfs4_put_state_owner(sp);
9512135d 2360 return status;
1da177e4
LT		 2361}
2362
2b484297 2363static struct inode *
cd9a1c0e 2364nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2365{
1da177e4 2366 struct nfs4_state *state;
1da177e4 2367
565277f6 2368 /* Protect against concurrent sillydeletes */
82be417a
AA		 2369 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2370 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2371 if (IS_ERR(state))
2372 return ERR_CAST(state);
cd9a1c0e 2373 ctx->state = state;
f46e0bd3 2374 return igrab(state->inode);
1da177e4
LT		 2375}
2376
1185a552 2377static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2378{
2379 if (ctx->state == NULL)
2380 return;
2381 if (is_sync)
643168c2 2382 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2383 else
643168c2 2384 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2385}
1da177e4
LT		 2386
2387static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2388{
43652ad5
BH		 2389 struct nfs4_server_caps_arg args = {
2390 .fhandle = fhandle,
2391 };
1da177e4
LT		 2392 struct nfs4_server_caps_res res = {};
2393 struct rpc_message msg = {
2394 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2395 .rpc_argp = &args,
1da177e4
LT		 2396 .rpc_resp = &res,
2397 };
2398 int status;
2399
7c513058 2400 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2401 if (status == 0) {
2402 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2403 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2404 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2405 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2406 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2407 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2408 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2409 server->caps |= NFS_CAP_ACLS;
2410 if (res.has_links != 0)
2411 server->caps |= NFS_CAP_HARDLINKS;
2412 if (res.has_symlinks != 0)
2413 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2414 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2415 server->caps |= NFS_CAP_FILEID;
2416 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2417 server->caps |= NFS_CAP_MODE;
2418 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2419 server->caps |= NFS_CAP_NLINK;
2420 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2421 server->caps |= NFS_CAP_OWNER;
2422 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2423 server->caps |= NFS_CAP_OWNER_GROUP;
2424 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2425 server->caps |= NFS_CAP_ATIME;
2426 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2427 server->caps |= NFS_CAP_CTIME;
2428 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2429 server->caps |= NFS_CAP_MTIME;
2430
a65318bf
TM		 2431 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2432 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2433 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2434 server->acl_bitmask = res.acl_bitmask;
264e6351 2435 server->fh_expire_type = res.fh_expire_type;
1da177e4 2436 }
cccef3b9 2437
1da177e4
LT		 2438 return status;
2439}
2440
55a97593 2441int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2442{
2443 struct nfs4_exception exception = { };
2444 int err;
2445 do {
2446 err = nfs4_handle_exception(server,
2447 _nfs4_server_capabilities(server, fhandle),
2448 &exception);
2449 } while (exception.retry);
2450 return err;
2451}
2452
2453static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2454 struct nfs_fsinfo *info)
2455{
1da177e4
LT		 2456 struct nfs4_lookup_root_arg args = {
2457 .bitmask = nfs4_fattr_bitmap,
2458 };
2459 struct nfs4_lookup_res res = {
2460 .server = server,
0e574af1 2461 .fattr = info->fattr,
1da177e4
LT		 2462 .fh = fhandle,
2463 };
2464 struct rpc_message msg = {
2465 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2466 .rpc_argp = &args,
2467 .rpc_resp = &res,
2468 };
008f55d0 2469
0e574af1 2470 nfs_fattr_init(info->fattr);
7c513058 2471 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2472}
2473
2474static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2475 struct nfs_fsinfo *info)
2476{
2477 struct nfs4_exception exception = { };
2478 int err;
2479 do {
fb8a5ba8
BS		 2480 err = _nfs4_lookup_root(server, fhandle, info);
2481 switch (err) {
2482 case 0:
2483 case -NFS4ERR_WRONGSEC:
05e9cfb4 2484 goto out;
fb8a5ba8
BS		 2485 default:
2486 err = nfs4_handle_exception(server, err, &exception);
2487 }
1da177e4 2488 } while (exception.retry);
05e9cfb4 2489out:
1da177e4
LT		 2490 return err;
2491}
2492
8f70e95f
BS		 2493static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2494 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2495{
2496 struct rpc_auth *auth;
2497 int ret;
2498
2499 auth = rpcauth_create(flavor, server->client);
e8d920c5 2500 if (IS_ERR(auth)) {
8f70e95f
BS		 2501 ret = -EIO;
2502 goto out;
2503 }
2504 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2505out:
2506 return ret;
2507}
2508
801a16dc 2509static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2510 struct nfs_fsinfo *info)
1da177e4 2511{
8f70e95f 2512 int i, len, status = 0;
0fabee24 2513 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2514
6a1a1e34 2515 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
4ea8fed5
TM		 2516 if (len < 0)
2517 return len;
8f70e95f
BS		 2518
2519 for (i = 0; i < len; i++) {
6a1a1e34
CL		 2520 /* AUTH_UNIX is the default flavor if none was specified,
2521 * thus has already been tried. */
2522 if (flav_array[i] == RPC_AUTH_UNIX)
2523 continue;
2524
8f70e95f 2525 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2526 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2527 continue;
2528 break;
8f70e95f 2529 }
fb8a5ba8
BS		 2530 /*
2531 * -EACCESS could mean that the user doesn't have correct permissions
2532 * to access the mount. It could also mean that we tried to mount
2533 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2534 * existing mount programs don't handle -EACCES very well so it should
2535 * be mapped to -EPERM instead.
2536 */
2537 if (status == -EACCES)
2538 status = -EPERM;
801a16dc
BS		 2539 return status;
2540}
2541
2542/*
2543 * get the file handle for the "/" directory on the server
2544 */
3028eb2b
BS		 2545int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2546 struct nfs_fsinfo *info)
801a16dc 2547{
fca78d6d 2548 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2549 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2550 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2551 /*
2552 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2553 * by nfs4_map_errors() as this function exits.
2554 */
fca78d6d 2555 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2556 if (status == 0)
2557 status = nfs4_server_capabilities(server, fhandle);
2558 if (status == 0)
2559 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2560 return nfs4_map_errors(status);
1da177e4
LT		 2561}
2562
bae36241
BS		 2563static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2564 struct nfs_fsinfo *info)
2565{
2566 int error;
2567 struct nfs_fattr *fattr = info->fattr;
2568
2569 error = nfs4_server_capabilities(server, mntfh);
2570 if (error < 0) {
2571 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2572 return error;
2573 }
2574
2575 error = nfs4_proc_getattr(server, mntfh, fattr);
2576 if (error < 0) {
2577 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2578 return error;
2579 }
2580
2581 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2582 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2583 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2584
2585 return error;
2586}
2587
6b97fd3d
MN		 2588/*
2589 * Get locations and (maybe) other attributes of a referral.
2590 * Note that we'll actually follow the referral later when
2591 * we detect fsid mismatch in inode revalidation
2592 */
f05d147f
BS		 2593static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2594 const struct qstr *name, struct nfs_fattr *fattr,
2595 struct nfs_fh *fhandle)
6b97fd3d
MN		 2596{
2597 int status = -ENOMEM;
2598 struct page *page = NULL;
2599 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2600
2601 page = alloc_page(GFP_KERNEL);
2602 if (page == NULL)
2603 goto out;
2604 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2605 if (locations == NULL)
2606 goto out;
2607
f05d147f 2608 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2609 if (status != 0)
2610 goto out;
2611 /* Make sure server returned a different fsid for the referral */
2612 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2613 dprintk("%s: server did not return a different fsid for"
2614 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2615 status = -EIO;
2616 goto out;
2617 }
533eb461
AA		 2618 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2619 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2620
533eb461 2621 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2622 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2623 memset(fhandle, 0, sizeof(struct nfs_fh));
2624out:
2625 if (page)
2626 __free_page(page);
5d7ca35a 2627 kfree(locations);
6b97fd3d
MN		 2628 return status;
2629}
2630
1da177e4
LT		 2631static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2632{
2633 struct nfs4_getattr_arg args = {
2634 .fh = fhandle,
2635 .bitmask = server->attr_bitmask,
2636 };
2637 struct nfs4_getattr_res res = {
2638 .fattr = fattr,
2639 .server = server,
2640 };
2641 struct rpc_message msg = {
2642 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2643 .rpc_argp = &args,
2644 .rpc_resp = &res,
2645 };
2646
0e574af1 2647 nfs_fattr_init(fattr);
7c513058 2648 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2649}
2650
2651static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2652{
2653 struct nfs4_exception exception = { };
2654 int err;
2655 do {
2656 err = nfs4_handle_exception(server,
2657 _nfs4_proc_getattr(server, fhandle, fattr),
2658 &exception);
2659 } while (exception.retry);
2660 return err;
2661}
2662
2663/*
2664 * The file is not closed if it is opened due to the a request to change
2665 * the size of the file. The open call will not be needed once the
2666 * VFS layer lookup-intents are implemented.
2667 *
2668 * Close is called when the inode is destroyed.
2669 * If we haven't opened the file for O_WRONLY, we
2670 * need to in the size_change case to obtain a stateid.
2671 *
2672 * Got race?
2673 * Because OPEN is always done by name in nfsv4, it is
2674 * possible that we opened a different file by the same
2675 * name. We can recognize this race condition, but we
2676 * can't do anything about it besides returning an error.
2677 *
2678 * This will be fixed with VFS changes (lookup-intent).
2679 */
2680static int
2681nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2682 struct iattr *sattr)
2683{
08e9eac4 2684 struct inode *inode = dentry->d_inode;
659bfcd6 2685 struct rpc_cred *cred = NULL;
d530838b 2686 struct nfs4_state *state = NULL;
1da177e4
LT		 2687 int status;
2688
8a1636c4 2689 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2690 pnfs_commit_and_return_layout(inode);
8a1636c4 2691
0e574af1 2692 nfs_fattr_init(fattr);
1da177e4 2693
2669940d
AA		 2694 /* Deal with open(O_TRUNC) */
2695 if (sattr->ia_valid & ATTR_OPEN)
2696 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2697
2698 /* Optimization: if the end result is no change, don't RPC */
2699 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2700 return 0;
2701
d530838b 2702 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2703 if (sattr->ia_valid & ATTR_FILE) {
2704 struct nfs_open_context *ctx;
2705
2706 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2707 if (ctx) {
2708 cred = ctx->cred;
2709 state = ctx->state;
2710 }
659bfcd6 2711 }
08e9eac4 2712
659bfcd6 2713 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2714 if (status == 0)
2715 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2716 return status;
2717}
2718
0c2e53f1
TM		 2719static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2720 const struct qstr *name, struct nfs_fh *fhandle,
2721 struct nfs_fattr *fattr)
2b3de441 2722{
0c2e53f1 2723 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2724 int status;
2725 struct nfs4_lookup_arg args = {
2726 .bitmask = server->attr_bitmask,
0c2e53f1 2727 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2728 .name = name,
2729 };
2730 struct nfs4_lookup_res res = {
2731 .server = server,
2732 .fattr = fattr,
2733 .fh = fhandle,
2734 };
2735 struct rpc_message msg = {
2736 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2737 .rpc_argp = &args,
2738 .rpc_resp = &res,
2739 };
2740
2741 nfs_fattr_init(fattr);
2742
1da177e4 2743 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2744 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2745 dprintk("NFS reply lookup: %d\n", status);
2746 return status;
2747}
2748
72de53ec 2749static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2750{
7ebb9315 2751 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2752 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2753 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2754 fattr->nlink = 2;
2755}
2756
72de53ec
BS		 2757static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2758 struct qstr *name, struct nfs_fh *fhandle,
2759 struct nfs_fattr *fattr)
1da177e4
LT		 2760{
2761 struct nfs4_exception exception = { };
72de53ec 2762 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2763 int err;
2764 do {
72de53ec
BS		 2765 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2766 switch (err) {
08ef7bd3 2767 case -NFS4ERR_BADNAME:
72de53ec
BS		 2768 err = -ENOENT;
2769 goto out;
0c2e53f1 2770 case -NFS4ERR_MOVED:
f05d147f 2771 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2772 goto out;
0c2e53f1 2773 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2774 err = -EPERM;
2775 if (client != *clnt)
2776 goto out;
2777
2778 client = nfs4_create_sec_client(client, dir, name);
2779 if (IS_ERR(client))
2780 return PTR_ERR(client);
2781
2782 exception.retry = 1;
2783 break;
2784 default:
2785 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2786 }
1da177e4 2787 } while (exception.retry);
72de53ec
BS		 2788
2789out:
2790 if (err == 0)
2791 *clnt = client;
2792 else if (client != *clnt)
2793 rpc_shutdown_client(client);
2794
1da177e4
LT		 2795 return err;
2796}
2797
80a16b21 2798static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2799 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2800{
2801 int status;
2802 struct rpc_clnt *client = NFS_CLIENT(dir);
2803
2804 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2805 if (client != NFS_CLIENT(dir)) {
2806 rpc_shutdown_client(client);
2807 nfs_fixup_secinfo_attributes(fattr);
2808 }
2809 return status;
2810}
2811
f05d147f
BS		 2812struct rpc_clnt *
2813nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2814 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2815{
2816 int status;
2817 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2818
2819 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2820 if (status < 0) {
2821 rpc_shutdown_client(client);
2822 return ERR_PTR(status);
2823 }
2824 return client;
2825}
2826
1da177e4
LT		 2827static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2828{
76b32999 2829 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2830 struct nfs4_accessargs args = {
2831 .fh = NFS_FH(inode),
a4980e78 2832 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2833 };
2834 struct nfs4_accessres res = {
2835 .server = server,
1da177e4 2836 };
1da177e4
LT		 2837 struct rpc_message msg = {
2838 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2839 .rpc_argp = &args,
2840 .rpc_resp = &res,
2841 .rpc_cred = entry->cred,
2842 };
2843 int mode = entry->mask;
2844 int status;
2845
2846 /*
2847 * Determine which access bits we want to ask for...
2848 */
2849 if (mode & MAY_READ)
2850 args.access |= NFS4_ACCESS_READ;
2851 if (S_ISDIR(inode->i_mode)) {
2852 if (mode & MAY_WRITE)
2853 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2854 if (mode & MAY_EXEC)
2855 args.access |= NFS4_ACCESS_LOOKUP;
2856 } else {
2857 if (mode & MAY_WRITE)
2858 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2859 if (mode & MAY_EXEC)
2860 args.access |= NFS4_ACCESS_EXECUTE;
2861 }
c407d41a
TM		 2862
2863 res.fattr = nfs_alloc_fattr();
2864 if (res.fattr == NULL)
2865 return -ENOMEM;
2866
7c513058 2867 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2868 if (!status) {
6168f62c 2869 nfs_access_set_mask(entry, res.access);
c407d41a 2870 nfs_refresh_inode(inode, res.fattr);
1da177e4 2871 }
c407d41a 2872 nfs_free_fattr(res.fattr);
1da177e4
LT		 2873 return status;
2874}
2875
2876static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2877{
2878 struct nfs4_exception exception = { };
2879 int err;
2880 do {
2881 err = nfs4_handle_exception(NFS_SERVER(inode),
2882 _nfs4_proc_access(inode, entry),
2883 &exception);
2884 } while (exception.retry);
2885 return err;
2886}
2887
2888/*
2889 * TODO: For the time being, we don't try to get any attributes
2890 * along with any of the zero-copy operations READ, READDIR,
2891 * READLINK, WRITE.
2892 *
2893 * In the case of the first three, we want to put the GETATTR
2894 * after the read-type operation -- this is because it is hard
2895 * to predict the length of a GETATTR response in v4, and thus
2896 * align the READ data correctly. This means that the GETATTR
2897 * may end up partially falling into the page cache, and we should
2898 * shift it into the 'tail' of the xdr_buf before processing.
2899 * To do this efficiently, we need to know the total length
2900 * of data received, which doesn't seem to be available outside
2901 * of the RPC layer.
2902 *
2903 * In the case of WRITE, we also want to put the GETATTR after
2904 * the operation -- in this case because we want to make sure
140150db 2905 * we get the post-operation mtime and size.
1da177e4
LT		 2906 *
2907 * Both of these changes to the XDR layer would in fact be quite
2908 * minor, but I decided to leave them for a subsequent patch.
2909 */
2910static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2911 unsigned int pgbase, unsigned int pglen)
2912{
2913 struct nfs4_readlink args = {
2914 .fh = NFS_FH(inode),
2915 .pgbase = pgbase,
2916 .pglen = pglen,
2917 .pages = &page,
2918 };
f50c7000 2919 struct nfs4_readlink_res res;
1da177e4
LT		 2920 struct rpc_message msg = {
2921 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2922 .rpc_argp = &args,
f50c7000 2923 .rpc_resp = &res,
1da177e4
LT		 2924 };
2925
7c513058 2926 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2927}
2928
2929static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2930 unsigned int pgbase, unsigned int pglen)
2931{
2932 struct nfs4_exception exception = { };
2933 int err;
2934 do {
2935 err = nfs4_handle_exception(NFS_SERVER(inode),
2936 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2937 &exception);
2938 } while (exception.retry);
2939 return err;
2940}
2941
1da177e4 2942/*
8867fe58 2943 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2944 */
1da177e4
LT		 2945static int
2946nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2947 int flags)
1da177e4 2948{
8867fe58 2949 struct nfs_open_context *ctx;
1da177e4 2950 struct nfs4_state *state;
1da177e4
LT		 2951 int status = 0;
2952
8867fe58
MS		 2953 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2954 if (IS_ERR(ctx))
2955 return PTR_ERR(ctx);
2956
a8a5da99 2957 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 2958 state = nfs4_do_open(dir, dentry, ctx->mode,
2959 flags, sattr, ctx->cred,
2960 &ctx->mdsthreshold);
d4d9cdcb 2961 d_drop(dentry);
1da177e4
LT		 2962 if (IS_ERR(state)) {
2963 status = PTR_ERR(state);
c0204fd2 2964 goto out;
1da177e4 2965 }
d4d9cdcb 2966 d_add(dentry, igrab(state->inode));
d75340cc 2967 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 2968 ctx->state = state;
1da177e4 2969out:
8867fe58 2970 put_nfs_open_context(ctx);
1da177e4
LT		 2971 return status;
2972}
2973
2974static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2975{
16e42959 2976 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2977 struct nfs_removeargs args = {
1da177e4 2978 .fh = NFS_FH(dir),
26fe5750 2979 .name = *name,
16e42959 2980 };
4fdc17b2 2981 struct nfs_removeres res = {
16e42959 2982 .server = server,
1da177e4 2983 };
1da177e4 2984 struct rpc_message msg = {
4fdc17b2
TM		 2985 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2986 .rpc_argp = &args,
2987 .rpc_resp = &res,
1da177e4 2988 };
778d2817 2989 int status;
1da177e4 2990
7c513058 2991 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 2992 if (status == 0)
16e42959 2993 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 2994 return status;
2995}
2996
2997static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2998{
2999 struct nfs4_exception exception = { };
3000 int err;
3001 do {
3002 err = nfs4_handle_exception(NFS_SERVER(dir),
3003 _nfs4_proc_remove(dir, name),
3004 &exception);
3005 } while (exception.retry);
3006 return err;
3007}
3008
e4eff1a6 3009static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3010{
e4eff1a6
TM		 3011 struct nfs_server *server = NFS_SERVER(dir);
3012 struct nfs_removeargs *args = msg->rpc_argp;
3013 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3014
e4eff1a6 3015 res->server = server;
1da177e4 3016 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3017 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 3018}
3019
34e137cc
BS		 3020static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3021{
d9afbd1b
TM		 3022 nfs4_setup_sequence(NFS_SERVER(data->dir),
3023 &data->args.seq_args,
3024 &data->res.seq_res,
3025 task);
1da177e4
LT		 3026}
3027
e4eff1a6 3028static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3029{
e4eff1a6
TM		 3030 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3031
14516c3a
TM		 3032 if (!nfs4_sequence_done(task, &res->seq_res))
3033 return 0;
9e33bed5 3034 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3035 return 0;
3036 update_changeattr(dir, &res->cinfo);
e4eff1a6 3037 return 1;
1da177e4
LT		 3038}
3039
d3d4152a
JL		 3040static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3041{
3042 struct nfs_server *server = NFS_SERVER(dir);
3043 struct nfs_renameargs *arg = msg->rpc_argp;
3044 struct nfs_renameres *res = msg->rpc_resp;
3045
3046 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3047 res->server = server;
9d12b216 3048 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3049}
3050
c6bfa1a1
BS		 3051static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3052{
d9afbd1b
TM		 3053 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3054 &data->args.seq_args,
3055 &data->res.seq_res,
3056 task);
d3d4152a
JL		 3057}
3058
3059static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3060 struct inode *new_dir)
3061{
3062 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3063
3064 if (!nfs4_sequence_done(task, &res->seq_res))
3065 return 0;
3066 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3067 return 0;
3068
3069 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3070 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3071 return 1;
3072}
3073
1da177e4
LT		 3074static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3075 struct inode *new_dir, struct qstr *new_name)
3076{
6caf2c82 3077 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3078 struct nfs_renameargs arg = {
1da177e4
LT		 3079 .old_dir = NFS_FH(old_dir),
3080 .new_dir = NFS_FH(new_dir),
3081 .old_name = old_name,
3082 .new_name = new_name,
6caf2c82 3083 };
e8582a8b 3084 struct nfs_renameres res = {
6caf2c82 3085 .server = server,
1da177e4 3086 };
1da177e4
LT		 3087 struct rpc_message msg = {
3088 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3089 .rpc_argp = &arg,
3090 .rpc_resp = &res,
3091 };
011fff72 3092 int status = -ENOMEM;
1da177e4 3093
7c513058 3094 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3095 if (!status) {
3096 update_changeattr(old_dir, &res.old_cinfo);
3097 update_changeattr(new_dir, &res.new_cinfo);
3098 }
3099 return status;
3100}
3101
3102static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3103 struct inode *new_dir, struct qstr *new_name)
3104{
3105 struct nfs4_exception exception = { };
3106 int err;
3107 do {
3108 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3109 _nfs4_proc_rename(old_dir, old_name,
3110 new_dir, new_name),
3111 &exception);
3112 } while (exception.retry);
3113 return err;
3114}
3115
3116static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3117{
91ba2eee 3118 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3119 struct nfs4_link_arg arg = {
3120 .fh = NFS_FH(inode),
3121 .dir_fh = NFS_FH(dir),
3122 .name = name,
91ba2eee
TM		 3123 .bitmask = server->attr_bitmask,
3124 };
91ba2eee
TM		 3125 struct nfs4_link_res res = {
3126 .server = server,
1da177e4 3127 };
1da177e4
LT		 3128 struct rpc_message msg = {
3129 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3130 .rpc_argp = &arg,
91ba2eee 3131 .rpc_resp = &res,
1da177e4 3132 };
136f2627
TM		 3133 int status = -ENOMEM;
3134
3135 res.fattr = nfs_alloc_fattr();
778d2817 3136 if (res.fattr == NULL)
136f2627 3137 goto out;
1da177e4 3138
7c513058 3139 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3140 if (!status) {
3141 update_changeattr(dir, &res.cinfo);
73a3d07c 3142 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3143 }
136f2627 3144out:
136f2627 3145 nfs_free_fattr(res.fattr);
1da177e4
LT		 3146 return status;
3147}
3148
3149static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3150{
3151 struct nfs4_exception exception = { };
3152 int err;
3153 do {
3154 err = nfs4_handle_exception(NFS_SERVER(inode),
3155 _nfs4_proc_link(inode, dir, name),
3156 &exception);
3157 } while (exception.retry);
3158 return err;
3159}
3160
57dc9a57
TM		 3161struct nfs4_createdata {
3162 struct rpc_message msg;
3163 struct nfs4_create_arg arg;
3164 struct nfs4_create_res res;
3165 struct nfs_fh fh;
3166 struct nfs_fattr fattr;
57dc9a57
TM		 3167};
3168
3169static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3170 struct qstr *name, struct iattr *sattr, u32 ftype)
3171{
3172 struct nfs4_createdata *data;
3173
3174 data = kzalloc(sizeof(*data), GFP_KERNEL);
3175 if (data != NULL) {
3176 struct nfs_server *server = NFS_SERVER(dir);
3177
3178 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3179 data->msg.rpc_argp = &data->arg;
3180 data->msg.rpc_resp = &data->res;
3181 data->arg.dir_fh = NFS_FH(dir);
3182 data->arg.server = server;
3183 data->arg.name = name;
3184 data->arg.attrs = sattr;
3185 data->arg.ftype = ftype;
3186 data->arg.bitmask = server->attr_bitmask;
3187 data->res.server = server;
3188 data->res.fh = &data->fh;
3189 data->res.fattr = &data->fattr;
57dc9a57 3190 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3191 }
3192 return data;
3193}
3194
3195static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3196{
7c513058 3197 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3198 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3199 if (status == 0) {
3200 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3201 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3202 }
3203 return status;
3204}
3205
3206static void nfs4_free_createdata(struct nfs4_createdata *data)
3207{
3208 kfree(data);
3209}
3210
4f390c15 3211static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3212 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3213{
57dc9a57
TM		 3214 struct nfs4_createdata *data;
3215 int status = -ENAMETOOLONG;
1da177e4 3216
94a6d753 3217 if (len > NFS4_MAXPATHLEN)
57dc9a57 3218 goto out;
4f390c15 3219
57dc9a57
TM		 3220 status = -ENOMEM;
3221 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3222 if (data == NULL)
3223 goto out;
3224
3225 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3226 data->arg.u.symlink.pages = &page;
3227 data->arg.u.symlink.len = len;
1da177e4 3228
57dc9a57
TM		 3229 status = nfs4_do_create(dir, dentry, data);
3230
3231 nfs4_free_createdata(data);
3232out:
1da177e4
LT		 3233 return status;
3234}
3235
4f390c15 3236static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3237 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3238{
3239 struct nfs4_exception exception = { };
3240 int err;
3241 do {
3242 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3243 _nfs4_proc_symlink(dir, dentry, page,
3244 len, sattr),
1da177e4
LT		 3245 &exception);
3246 } while (exception.retry);
3247 return err;
3248}
3249
3250static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3251 struct iattr *sattr)
3252{
57dc9a57
TM		 3253 struct nfs4_createdata *data;
3254 int status = -ENOMEM;
1da177e4 3255
57dc9a57
TM		 3256 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3257 if (data == NULL)
3258 goto out;
3259
3260 status = nfs4_do_create(dir, dentry, data);
3261
3262 nfs4_free_createdata(data);
3263out:
1da177e4
LT		 3264 return status;
3265}
3266
3267static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3268 struct iattr *sattr)
3269{
3270 struct nfs4_exception exception = { };
3271 int err;
a8a5da99
AK		 3272
3273 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3274 do {
3275 err = nfs4_handle_exception(NFS_SERVER(dir),
3276 _nfs4_proc_mkdir(dir, dentry, sattr),
3277 &exception);
3278 } while (exception.retry);
3279 return err;
3280}
3281
3282static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3283 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3284{
3285 struct inode *dir = dentry->d_inode;
3286 struct nfs4_readdir_arg args = {
3287 .fh = NFS_FH(dir),
56e4ebf8 3288 .pages = pages,
1da177e4
LT		 3289 .pgbase = 0,
3290 .count = count,
96d25e53 3291 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3292 .plus = plus,
1da177e4
LT		 3293 };
3294 struct nfs4_readdir_res res;
3295 struct rpc_message msg = {
3296 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3297 .rpc_argp = &args,
3298 .rpc_resp = &res,
3299 .rpc_cred = cred,
3300 };
3301 int status;
3302
3110ff80 3303 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3304 dentry->d_parent->d_name.name,
3305 dentry->d_name.name,
3306 (unsigned long long)cookie);
c3f52af3 3307 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3308 res.pgbase = args.pgbase;
7c513058 3309 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3310 if (status >= 0) {
c3f52af3 3311 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3312 status += args.pgbase;
3313 }
c4812998
TM		 3314
3315 nfs_invalidate_atime(dir);
3316
3110ff80 3317 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3318 return status;
3319}
3320
3321static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3322 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3323{
3324 struct nfs4_exception exception = { };
3325 int err;
3326 do {
3327 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3328 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3329 pages, count, plus),
1da177e4
LT		 3330 &exception);
3331 } while (exception.retry);
3332 return err;
3333}
3334
3335static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3336 struct iattr *sattr, dev_t rdev)
3337{
57dc9a57
TM		 3338 struct nfs4_createdata *data;
3339 int mode = sattr->ia_mode;
3340 int status = -ENOMEM;
1da177e4 3341
57dc9a57
TM		 3342 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3343 if (data == NULL)
3344 goto out;
3345
1da177e4 3346 if (S_ISFIFO(mode))
57dc9a57 3347 data->arg.ftype = NF4FIFO;
1da177e4 3348 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3349 data->arg.ftype = NF4BLK;
3350 data->arg.u.device.specdata1 = MAJOR(rdev);
3351 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3352 }
3353 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3354 data->arg.ftype = NF4CHR;
3355 data->arg.u.device.specdata1 = MAJOR(rdev);
3356 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3357 } else if (!S_ISSOCK(mode)) {
3358 status = -EINVAL;
3359 goto out_free;
1da177e4 3360 }
1da177e4 3361
57dc9a57 3362 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3363out_free:
57dc9a57
TM		 3364 nfs4_free_createdata(data);
3365out:
1da177e4
LT		 3366 return status;
3367}
3368
3369static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3370 struct iattr *sattr, dev_t rdev)
3371{
3372 struct nfs4_exception exception = { };
3373 int err;
a8a5da99
AK		 3374
3375 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3376 do {
3377 err = nfs4_handle_exception(NFS_SERVER(dir),
3378 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3379 &exception);
3380 } while (exception.retry);
3381 return err;
3382}
3383
3384static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3385 struct nfs_fsstat *fsstat)
3386{
3387 struct nfs4_statfs_arg args = {
3388 .fh = fhandle,
3389 .bitmask = server->attr_bitmask,
3390 };
24ad148a
BH		 3391 struct nfs4_statfs_res res = {
3392 .fsstat = fsstat,
3393 };
1da177e4
LT		 3394 struct rpc_message msg = {
3395 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3396 .rpc_argp = &args,
24ad148a 3397 .rpc_resp = &res,
1da177e4
LT		 3398 };
3399
0e574af1 3400 nfs_fattr_init(fsstat->fattr);
7c513058 3401 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3402}
3403
3404static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3405{
3406 struct nfs4_exception exception = { };
3407 int err;
3408 do {
3409 err = nfs4_handle_exception(server,
3410 _nfs4_proc_statfs(server, fhandle, fsstat),
3411 &exception);
3412 } while (exception.retry);
3413 return err;
3414}
3415
3416static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3417 struct nfs_fsinfo *fsinfo)
3418{
3419 struct nfs4_fsinfo_arg args = {
3420 .fh = fhandle,
3421 .bitmask = server->attr_bitmask,
3422 };
3dda5e43
BH		 3423 struct nfs4_fsinfo_res res = {
3424 .fsinfo = fsinfo,
3425 };
1da177e4
LT		 3426 struct rpc_message msg = {
3427 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3428 .rpc_argp = &args,
3dda5e43 3429 .rpc_resp = &res,
1da177e4
LT		 3430 };
3431
7c513058 3432 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3433}
3434
3435static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3436{
3437 struct nfs4_exception exception = { };
3438 int err;
3439
3440 do {
3441 err = nfs4_handle_exception(server,
3442 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3443 &exception);
3444 } while (exception.retry);
3445 return err;
3446}
3447
3448static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3449{
e38eb650
BS		 3450 int error;
3451
0e574af1 3452 nfs_fattr_init(fsinfo->fattr);
e38eb650 3453 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3454 if (error == 0) {
3455 /* block layout checks this! */
3456 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3457 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3458 }
e38eb650
BS		 3459
3460 return error;
1da177e4
LT		 3461}
3462
3463static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3464 struct nfs_pathconf *pathconf)
3465{
3466 struct nfs4_pathconf_arg args = {
3467 .fh = fhandle,
3468 .bitmask = server->attr_bitmask,
3469 };
d45b2989
BH		 3470 struct nfs4_pathconf_res res = {
3471 .pathconf = pathconf,
3472 };
1da177e4
LT		 3473 struct rpc_message msg = {
3474 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3475 .rpc_argp = &args,
d45b2989 3476 .rpc_resp = &res,
1da177e4
LT		 3477 };
3478
3479 /* None of the pathconf attributes are mandatory to implement */
3480 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3481 memset(pathconf, 0, sizeof(*pathconf));
3482 return 0;
3483 }
3484
0e574af1 3485 nfs_fattr_init(pathconf->fattr);
7c513058 3486 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3487}
3488
3489static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3490 struct nfs_pathconf *pathconf)
3491{
3492 struct nfs4_exception exception = { };
3493 int err;
3494
3495 do {
3496 err = nfs4_handle_exception(server,
3497 _nfs4_proc_pathconf(server, fhandle, pathconf),
3498 &exception);
3499 } while (exception.retry);
3500 return err;
3501}
3502
5521abfd 3503int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3504 const struct nfs_open_context *ctx,
3505 const struct nfs_lock_context *l_ctx,
3506 fmode_t fmode)
3507{
3508 const struct nfs_lockowner *lockowner = NULL;
3509
3510 if (l_ctx != NULL)
3511 lockowner = &l_ctx->lockowner;
5521abfd 3512 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3513}
3514EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3515
5521abfd
TM		 3516static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3517 const struct nfs_open_context *ctx,
3518 const struct nfs_lock_context *l_ctx,
3519 fmode_t fmode)
3520{
3521 nfs4_stateid current_stateid;
3522
3523 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3524 return false;
3525 return nfs4_stateid_match(stateid, &current_stateid);
3526}
3527
3528static bool nfs4_error_stateid_expired(int err)
3529{
3530 switch (err) {
3531 case -NFS4ERR_DELEG_REVOKED:
3532 case -NFS4ERR_ADMIN_REVOKED:
3533 case -NFS4ERR_BAD_STATEID:
3534 case -NFS4ERR_STALE_STATEID:
3535 case -NFS4ERR_OLD_STATEID:
3536 case -NFS4ERR_OPENMODE:
3537 case -NFS4ERR_EXPIRED:
3538 return true;
3539 }
3540 return false;
3541}
3542
d20581aa
BH		 3543void __nfs4_read_done_cb(struct nfs_read_data *data)
3544{
cd841605 3545 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3546}
3547
cbdabc7f 3548static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3549{
cd841605 3550 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3551
9e33bed5 3552 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3553 rpc_restart_call_prepare(task);
ec06c096 3554 return -EAGAIN;
1da177e4 3555 }
8850df99 3556
d20581aa 3557 __nfs4_read_done_cb(data);
1da177e4 3558 if (task->tk_status > 0)
ec06c096
TM		 3559 renew_lease(server, data->timestamp);
3560 return 0;
1da177e4
LT		 3561}
3562
5521abfd
TM		 3563static bool nfs4_read_stateid_changed(struct rpc_task *task,
3564 struct nfs_readargs *args)
3565{
3566
3567 if (!nfs4_error_stateid_expired(task->tk_status) ||
3568 nfs4_stateid_is_current(&args->stateid,
3569 args->context,
3570 args->lock_context,
3571 FMODE_READ))
3572 return false;
3573 rpc_restart_call_prepare(task);
3574 return true;
3575}
3576
cbdabc7f
AA		 3577static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3578{
3579
3580 dprintk("--> %s\n", __func__);
3581
3582 if (!nfs4_sequence_done(task, &data->res.seq_res))
3583 return -EAGAIN;
5521abfd
TM		 3584 if (nfs4_read_stateid_changed(task, &data->args))
3585 return -EAGAIN;
d20581aa
BH		 3586 return data->read_done_cb ? data->read_done_cb(task, data) :
3587 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3588}
3589
bdc7f021 3590static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3591{
1da177e4 3592 data->timestamp = jiffies;
cbdabc7f 3593 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3594 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3595 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3596}
3597
ea7c3303
BS		 3598static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3599{
9b206149 3600 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3601 &data->args.seq_args,
3602 &data->res.seq_res,
9b206149
TM		 3603 task))
3604 return;
3605 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3606 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3607}
3608
b029bc9b 3609static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3610{
cd841605 3611 struct inode *inode = data->header->inode;
1da177e4 3612
9e33bed5 3613 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3614 rpc_restart_call_prepare(task);
788e7a89 3615 return -EAGAIN;
1da177e4 3616 }
4f9838c7 3617 if (task->tk_status >= 0) {
1da177e4 3618 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3619 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3620 }
788e7a89 3621 return 0;
1da177e4
LT		 3622}
3623
5521abfd
TM		 3624static bool nfs4_write_stateid_changed(struct rpc_task *task,
3625 struct nfs_writeargs *args)
3626{
3627
3628 if (!nfs4_error_stateid_expired(task->tk_status) ||
3629 nfs4_stateid_is_current(&args->stateid,
3630 args->context,
3631 args->lock_context,
3632 FMODE_WRITE))
3633 return false;
3634 rpc_restart_call_prepare(task);
3635 return true;
3636}
3637
b029bc9b
FI		 3638static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3639{
3640 if (!nfs4_sequence_done(task, &data->res.seq_res))
3641 return -EAGAIN;
5521abfd
TM		 3642 if (nfs4_write_stateid_changed(task, &data->args))
3643 return -EAGAIN;
d20581aa
BH		 3644 return data->write_done_cb ? data->write_done_cb(task, data) :
3645 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3646}
3647
5a37f851
TM		 3648static
3649bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3650{
5a37f851
TM		 3651 const struct nfs_pgio_header *hdr = data->header;
3652
3653 /* Don't request attributes for pNFS or O_DIRECT writes */
3654 if (data->ds_clp != NULL || hdr->dreq != NULL)
3655 return false;
3656 /* Otherwise, request attributes if and only if we don't hold
3657 * a delegation
3658 */
011e2a7f 3659 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3660}
a69aef14 3661
bdc7f021 3662static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3663{
cd841605 3664 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3665
5a37f851 3666 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3667 data->args.bitmask = NULL;
3668 data->res.fattr = NULL;
3669 } else
3670 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3671
b029bc9b
FI		 3672 if (!data->write_done_cb)
3673 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3674 data->res.server = server;
1da177e4
LT		 3675 data->timestamp = jiffies;
3676
bdc7f021 3677 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3678 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3679}
3680
c6cb80d0
BS		 3681static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3682{
9b206149 3683 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3684 &data->args.seq_args,
3685 &data->res.seq_res,
9b206149
TM		 3686 task))
3687 return;
3688 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3689 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 3690}
3691
0b7c0153 3692static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3693{
d9afbd1b
TM		 3694 nfs4_setup_sequence(NFS_SERVER(data->inode),
3695 &data->args.seq_args,
3696 &data->res.seq_res,
3697 task);
1da177e4
LT		 3698}
3699
0b7c0153 3700static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3701{
1da177e4 3702 struct inode *inode = data->inode;
14516c3a 3703
9e33bed5 3704 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3705 rpc_restart_call_prepare(task);
788e7a89 3706 return -EAGAIN;
1da177e4 3707 }
788e7a89 3708 return 0;
1da177e4
LT		 3709}
3710
0b7c0153 3711static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3712{
3713 if (!nfs4_sequence_done(task, &data->res.seq_res))
3714 return -EAGAIN;
0b7c0153 3715 return data->commit_done_cb(task, data);
5f452431
FI		 3716}
3717
0b7c0153 3718static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3719{
788e7a89 3720 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3721
0b7c0153
FI		 3722 if (data->commit_done_cb == NULL)
3723 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3724 data->res.server = server;
bdc7f021 3725 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3726 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3727}
3728
9bc4e3ca
CL		 3729struct nfs4_renewdata {
3730 struct nfs_client *client;
3731 unsigned long timestamp;
3732};
3733
1da177e4
LT		 3734/*
3735 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3736 * standalone procedure for queueing an asynchronous RENEW.
3737 */
9bc4e3ca 3738static void nfs4_renew_release(void *calldata)
dc96aef9 3739{
9bc4e3ca
CL		 3740 struct nfs4_renewdata *data = calldata;
3741 struct nfs_client *clp = data->client;
dc96aef9 3742
0851de06
AB		 3743 if (atomic_read(&clp->cl_count) > 1)
3744 nfs4_schedule_state_renewal(clp);
3745 nfs_put_client(clp);
9bc4e3ca 3746 kfree(data);
dc96aef9
AB		 3747}
3748
9bc4e3ca 3749static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3750{
9bc4e3ca
CL		 3751 struct nfs4_renewdata *data = calldata;
3752 struct nfs_client *clp = data->client;
3753 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3754
3755 if (task->tk_status < 0) {
95baa25c 3756 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3757 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3758 return;
3759 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3760 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3761 return;
3762 }
3763 nfs4_schedule_path_down_recovery(clp);
1da177e4 3764 }
452e9352 3765 do_renew_lease(clp, timestamp);
1da177e4
LT		 3766}
3767
963d8fe5
TM		 3768static const struct rpc_call_ops nfs4_renew_ops = {
3769 .rpc_call_done = nfs4_renew_done,
dc96aef9 3770 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3771};
3772
2f60ea6b 3773static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3774{
3775 struct rpc_message msg = {
3776 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3777 .rpc_argp = clp,
b4454fe1 3778 .rpc_cred = cred,
1da177e4 3779 };
9bc4e3ca 3780 struct nfs4_renewdata *data;
1da177e4 3781
2f60ea6b
TM		 3782 if (renew_flags == 0)
3783 return 0;
0851de06
AB		 3784 if (!atomic_inc_not_zero(&clp->cl_count))
3785 return -EIO;
b569ad34 3786 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3787 if (data == NULL)
3788 return -ENOMEM;
3789 data->client = clp;
3790 data->timestamp = jiffies;
1da177e4 3791 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3792 &nfs4_renew_ops, data);
1da177e4
LT		 3793}
3794
8534d4ec 3795static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3796{
3797 struct rpc_message msg = {
3798 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3799 .rpc_argp = clp,
b4454fe1 3800 .rpc_cred = cred,
1da177e4
LT		 3801 };
3802 unsigned long now = jiffies;
3803 int status;
3804
3805 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3806 if (status < 0)
3807 return status;
452e9352 3808 do_renew_lease(clp, now);
1da177e4
LT		 3809 return 0;
3810}
3811
aa1870af
BF		 3812static inline int nfs4_server_supports_acls(struct nfs_server *server)
3813{
3814 return (server->caps & NFS_CAP_ACLS)
3815 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3816 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3817}
3818
21f498c2
TM		 3819/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3820 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3821 * the stack.
3822 */
21f498c2 3823#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3824
e9e3d724
NH		 3825static int buf_to_pages_noslab(const void *buf, size_t buflen,
3826 struct page **pages, unsigned int *pgbase)
3827{
3828 struct page *newpage, **spages;
3829 int rc = 0;
3830 size_t len;
3831 spages = pages;
3832
3833 do {
21f498c2 3834 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3835 newpage = alloc_page(GFP_KERNEL);
3836
3837 if (newpage == NULL)
3838 goto unwind;
3839 memcpy(page_address(newpage), buf, len);
3840 buf += len;
3841 buflen -= len;
3842 *pages++ = newpage;
3843 rc++;
3844 } while (buflen != 0);
3845
3846 return rc;
3847
3848unwind:
3849 for(; rc > 0; rc--)
3850 __free_page(spages[rc-1]);
3851 return -ENOMEM;
3852}
3853
e50a1c2e
BF		 3854struct nfs4_cached_acl {
3855 int cached;
3856 size_t len;
3e9d4154 3857 char data[0];
e50a1c2e
BF		 3858};
3859
3860static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3861{
3862 struct nfs_inode *nfsi = NFS_I(inode);
3863
3864 spin_lock(&inode->i_lock);
3865 kfree(nfsi->nfs4_acl);
3866 nfsi->nfs4_acl = acl;
3867 spin_unlock(&inode->i_lock);
3868}
3869
3870static void nfs4_zap_acl_attr(struct inode *inode)
3871{
3872 nfs4_set_cached_acl(inode, NULL);
3873}
3874
3875static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3876{
3877 struct nfs_inode *nfsi = NFS_I(inode);
3878 struct nfs4_cached_acl *acl;
3879 int ret = -ENOENT;
3880
3881 spin_lock(&inode->i_lock);
3882 acl = nfsi->nfs4_acl;
3883 if (acl == NULL)
3884 goto out;
3885 if (buf == NULL) /* user is just asking for length */
3886 goto out_len;
3887 if (acl->cached == 0)
3888 goto out;
3889 ret = -ERANGE; /* see getxattr(2) man page */
3890 if (acl->len > buflen)
3891 goto out;
3892 memcpy(buf, acl->data, acl->len);
3893out_len:
3894 ret = acl->len;
3895out:
3896 spin_unlock(&inode->i_lock);
3897 return ret;
3898}
3899
5794d21e 3900static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3901{
3902 struct nfs4_cached_acl *acl;
b291f1b1 3903 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3904
1f1ea6c2 3905 if (buflen <= PAGE_SIZE) {
b291f1b1 3906 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3907 if (acl == NULL)
3908 goto out;
3909 acl->cached = 1;
5794d21e 3910 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3911 } else {
3912 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3913 if (acl == NULL)
3914 goto out;
3915 acl->cached = 0;
3916 }
3917 acl->len = acl_len;
3918out:
3919 nfs4_set_cached_acl(inode, acl);
3920}
3921
bf118a34
AA		 3922/*
3923 * The getxattr API returns the required buffer length when called with a
3924 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3925 * the required buf. On a NULL buf, we send a page of data to the server
3926 * guessing that the ACL request can be serviced by a page. If so, we cache
3927 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3928 * the cache. If not so, we throw away the page, and cache the required
3929 * length. The next getxattr call will then produce another round trip to
3930 * the server, this time with the input buf of the required size.
3931 */
16b4289c 3932static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3933{
bf118a34 3934 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3935 struct nfs_getaclargs args = {
3936 .fh = NFS_FH(inode),
3937 .acl_pages = pages,
3938 .acl_len = buflen,
3939 };
663c79b3
BH		 3940 struct nfs_getaclres res = {
3941 .acl_len = buflen,
3942 };
aa1870af
BF		 3943 struct rpc_message msg = {
3944 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3945 .rpc_argp = &args,
663c79b3 3946 .rpc_resp = &res,
aa1870af 3947 };
21f498c2
TM		 3948 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3949 int ret = -ENOMEM, i;
aa1870af 3950
bf118a34
AA		 3951 /* As long as we're doing a round trip to the server anyway,
3952 * let's be prepared for a page of acl data. */
3953 if (npages == 0)
3954 npages = 1;
21f498c2
TM		 3955 if (npages > ARRAY_SIZE(pages))
3956 return -ERANGE;
5a006899 3957
bf118a34
AA		 3958 for (i = 0; i < npages; i++) {
3959 pages[i] = alloc_page(GFP_KERNEL);
3960 if (!pages[i])
3961 goto out_free;
e50a1c2e 3962 }
5a006899
SP		 3963
3964 /* for decoding across pages */
3965 res.acl_scratch = alloc_page(GFP_KERNEL);
3966 if (!res.acl_scratch)
3967 goto out_free;
3968
bf118a34
AA		 3969 args.acl_len = npages * PAGE_SIZE;
3970 args.acl_pgbase = 0;
5a006899 3971
de040bec 3972 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3973 __func__, buf, buflen, npages, args.acl_len);
3974 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3975 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3976 if (ret)
3977 goto out_free;
bf118a34 3978
1f1ea6c2
TM		 3979 /* Handle the case where the passed-in buffer is too short */
3980 if (res.acl_flags & NFS4_ACL_TRUNC) {
3981 /* Did the user only issue a request for the acl length? */
3982 if (buf == NULL)
3983 goto out_ok;
e50a1c2e 3984 ret = -ERANGE;
1f1ea6c2 3985 goto out_free;
e50a1c2e 3986 }
1f1ea6c2 3987 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 3988 if (buf) {
3989 if (res.acl_len > buflen) {
3990 ret = -ERANGE;
3991 goto out_free;
3992 }
1f1ea6c2 3993 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 3994 }
1f1ea6c2
TM		 3995out_ok:
3996 ret = res.acl_len;
e50a1c2e 3997out_free:
bf118a34
AA		 3998 for (i = 0; i < npages; i++)
3999 if (pages[i])
4000 __free_page(pages[i]);
331818f1
TM		 4001 if (res.acl_scratch)
4002 __free_page(res.acl_scratch);
aa1870af
BF		 4003 return ret;
4004}
4005
16b4289c
TM		 4006static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4007{
4008 struct nfs4_exception exception = { };
4009 ssize_t ret;
4010 do {
4011 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4012 if (ret >= 0)
4013 break;
4014 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4015 } while (exception.retry);
4016 return ret;
4017}
4018
e50a1c2e
BF		 4019static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4020{
4021 struct nfs_server *server = NFS_SERVER(inode);
4022 int ret;
4023
4024 if (!nfs4_server_supports_acls(server))
4025 return -EOPNOTSUPP;
4026 ret = nfs_revalidate_inode(server, inode);
4027 if (ret < 0)
4028 return ret;
08a22b39
AK		 4029 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4030 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4031 ret = nfs4_read_cached_acl(inode, buf, buflen);
4032 if (ret != -ENOENT)
bf118a34
AA		 4033 /* -ENOENT is returned if there is no ACL or if there is an ACL
4034 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4035 return ret;
4036 return nfs4_get_acl_uncached(inode, buf, buflen);
4037}
4038
16b4289c 4039static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4040{
4041 struct nfs_server *server = NFS_SERVER(inode);
4042 struct page *pages[NFS4ACL_MAXPAGES];
4043 struct nfs_setaclargs arg = {
4044 .fh = NFS_FH(inode),
4045 .acl_pages = pages,
4046 .acl_len = buflen,
4047 };
73c403a9 4048 struct nfs_setaclres res;
4b580ee3
BF		 4049 struct rpc_message msg = {
4050 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4051 .rpc_argp = &arg,
73c403a9 4052 .rpc_resp = &res,
4b580ee3 4053 };
21f498c2 4054 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4055 int ret, i;
4b580ee3
BF		 4056
4057 if (!nfs4_server_supports_acls(server))
4058 return -EOPNOTSUPP;
21f498c2
TM		 4059 if (npages > ARRAY_SIZE(pages))
4060 return -ERANGE;
e9e3d724
NH		 4061 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4062 if (i < 0)
4063 return i;
57ec14c5 4064 nfs4_inode_return_delegation(inode);
7c513058 4065 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4066
4067 /*
4068 * Free each page after tx, so the only ref left is
4069 * held by the network stack
4070 */
4071 for (; i > 0; i--)
4072 put_page(pages[i-1]);
4073
08a22b39
AK		 4074 /*
4075 * Acl update can result in inode attribute update.
4076 * so mark the attribute cache invalid.
4077 */
4078 spin_lock(&inode->i_lock);
4079 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4080 spin_unlock(&inode->i_lock);
f41f7418
TM		 4081 nfs_access_zap_cache(inode);
4082 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4083 return ret;
4084}
4085
16b4289c
TM		 4086static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4087{
4088 struct nfs4_exception exception = { };
4089 int err;
4090 do {
4091 err = nfs4_handle_exception(NFS_SERVER(inode),
4092 __nfs4_proc_set_acl(inode, buf, buflen),
4093 &exception);
4094 } while (exception.retry);
4095 return err;
4096}
4097
1da177e4 4098static int
aa5190d0 4099nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4100{
aa5190d0
TM		 4101 struct nfs_client *clp = server->nfs_client;
4102
4103 if (task->tk_status >= 0)
1da177e4
LT		 4104 return 0;
4105 switch(task->tk_status) {
a1d0b5ee 4106 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4107 case -NFS4ERR_ADMIN_REVOKED:
4108 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4109 if (state == NULL)
4110 break;
4111 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4112 case -NFS4ERR_OPENMODE:
4113 if (state == NULL)
4114 break;
5d422301
TM		 4115 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4116 goto stateid_invalid;
0400a6b0 4117 goto wait_on_recovery;
0ced63d1 4118 case -NFS4ERR_EXPIRED:
5d422301
TM		 4119 if (state != NULL) {
4120 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4121 goto stateid_invalid;
4122 }
1da177e4 4123 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4124 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4125 nfs4_schedule_lease_recovery(clp);
4126 goto wait_on_recovery;
4745e315
AA		 4127#if defined(CONFIG_NFS_V4_1)
4128 case -NFS4ERR_BADSESSION:
4129 case -NFS4ERR_BADSLOT:
4130 case -NFS4ERR_BAD_HIGH_SLOT:
4131 case -NFS4ERR_DEADSESSION:
4132 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4133 case -NFS4ERR_SEQ_FALSE_RETRY:
4134 case -NFS4ERR_SEQ_MISORDERED:
4135 dprintk("%s ERROR %d, Reset session\n", __func__,
4136 task->tk_status);
9f594791 4137 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4138 task->tk_status = 0;
4139 return -EAGAIN;
4140#endif /* CONFIG_NFS_V4_1 */
1da177e4 4141 case -NFS4ERR_DELAY:
aa5190d0 4142 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4143 case -NFS4ERR_GRACE:
1da177e4
LT		 4144 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4145 task->tk_status = 0;
4146 return -EAGAIN;
a8a4ae3a 4147 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4148 case -NFS4ERR_OLD_STATEID:
4149 task->tk_status = 0;
4150 return -EAGAIN;
4151 }
4152 task->tk_status = nfs4_map_errors(task->tk_status);
4153 return 0;
5d422301
TM		 4154stateid_invalid:
4155 task->tk_status = -EIO;
4156 return 0;
0400a6b0 4157wait_on_recovery:
a2c0b9e2 4158 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4159 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4160 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4161 task->tk_status = 0;
4162 return -EAGAIN;
1da177e4
LT		 4163}
4164
f092075d
CL		 4165static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4166 nfs4_verifier *bootverf)
cd93710e
CL		 4167{
4168 __be32 verf[2];
4169
2c820d9a
CL		 4170 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4171 /* An impossible timestamp guarantees this value
4172 * will never match a generated boot time. */
4173 verf[0] = 0;
4174 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4175 } else {
f092075d
CL		 4176 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4177 verf[0] = (__be32)nn->boot_time.tv_sec;
4178 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4179 }
cd93710e
CL		 4180 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4181}
4182
e984a55a
CL		 4183static unsigned int
4184nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4185 char *buf, size_t len)
4186{
4187 unsigned int result;
4188
4189 rcu_read_lock();
4190 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4191 clp->cl_ipaddr,
4192 rpc_peeraddr2str(clp->cl_rpcclient,
4193 RPC_DISPLAY_ADDR),
4194 rpc_peeraddr2str(clp->cl_rpcclient,
4195 RPC_DISPLAY_PROTO));
4196 rcu_read_unlock();
4197 return result;
4198}
4199
4200static unsigned int
4201nfs4_init_uniform_client_string(const struct nfs_client *clp,
4202 char *buf, size_t len)
4203{
6f2ea7f2
CL		 4204 char *nodename = clp->cl_rpcclient->cl_nodename;
4205
4206 if (nfs4_client_id_uniquifier[0] != '\0')
4207 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4208 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4209 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4210 nodename);
e984a55a
CL		 4211}
4212
6bbb4ae8
CL		 4213/**
4214 * nfs4_proc_setclientid - Negotiate client ID
4215 * @clp: state data structure
4216 * @program: RPC program for NFSv4 callback service
4217 * @port: IP port number for NFS4 callback service
4218 * @cred: RPC credential to use for this call
4219 * @res: where to place the result
4220 *
4221 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4222 */
bb8b27e5
TM		 4223int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4224 unsigned short port, struct rpc_cred *cred,
4225 struct nfs4_setclientid_res *res)
1da177e4
LT		 4226{
4227 nfs4_verifier sc_verifier;
4228 struct nfs4_setclientid setclientid = {
4229 .sc_verifier = &sc_verifier,
4230 .sc_prog = program,
f4eecd5d 4231 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4232 };
4233 struct rpc_message msg = {
4234 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4235 .rpc_argp = &setclientid,
bb8b27e5 4236 .rpc_resp = res,
286d7d6a 4237 .rpc_cred = cred,
1da177e4 4238 };
6bbb4ae8 4239 int status;
1da177e4 4240
de734831 4241 /* nfs_client_id4 */
f092075d 4242 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4243 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4244 setclientid.sc_name_len =
4245 nfs4_init_uniform_client_string(clp,
4246 setclientid.sc_name,
4247 sizeof(setclientid.sc_name));
4248 else
4249 setclientid.sc_name_len =
4250 nfs4_init_nonuniform_client_string(clp,
4251 setclientid.sc_name,
4252 sizeof(setclientid.sc_name));
de734831 4253 /* cb_client4 */
e984a55a 4254 rcu_read_lock();
de734831 4255 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4256 sizeof(setclientid.sc_netid),
4257 rpc_peeraddr2str(clp->cl_rpcclient,
4258 RPC_DISPLAY_NETID));
de734831
CL		 4259 rcu_read_unlock();
4260 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4261 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4262 clp->cl_ipaddr, port >> 8, port & 255);
4263
6bbb4ae8
CL		 4264 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4265 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4266 setclientid.sc_name_len, setclientid.sc_name);
4267 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4268 dprintk("NFS reply setclientid: %d\n", status);
4269 return status;
1da177e4
LT		 4270}
4271
6bbb4ae8
CL		 4272/**
4273 * nfs4_proc_setclientid_confirm - Confirm client ID
4274 * @clp: state data structure
4275 * @res: result of a previous SETCLIENTID
4276 * @cred: RPC credential to use for this call
4277 *
4278 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4279 */
fd954ae1 4280int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4281 struct nfs4_setclientid_res *arg,
4282 struct rpc_cred *cred)
1da177e4
LT		 4283{
4284 struct nfs_fsinfo fsinfo;
4285 struct rpc_message msg = {
4286 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4287 .rpc_argp = arg,
1da177e4 4288 .rpc_resp = &fsinfo,
286d7d6a 4289 .rpc_cred = cred,
1da177e4
LT		 4290 };
4291 unsigned long now;
4292 int status;
4293
6bbb4ae8
CL		 4294 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4295 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4296 clp->cl_clientid);
1da177e4 4297 now = jiffies;
1bd714f2 4298 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4299 if (status == 0) {
4300 spin_lock(&clp->cl_lock);
4301 clp->cl_lease_time = fsinfo.lease_time * HZ;
4302 clp->cl_last_renewal = now;
4303 spin_unlock(&clp->cl_lock);
4304 }
6bbb4ae8 4305 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4306 return status;
4307}
4308
fe650407
TM		 4309struct nfs4_delegreturndata {
4310 struct nfs4_delegreturnargs args;
fa178f29 4311 struct nfs4_delegreturnres res;
fe650407
TM		 4312 struct nfs_fh fh;
4313 nfs4_stateid stateid;
26e976a8 4314 unsigned long timestamp;
fa178f29 4315 struct nfs_fattr fattr;
fe650407
TM		 4316 int rpc_status;
4317};
4318
fe650407
TM		 4319static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4320{
4321 struct nfs4_delegreturndata *data = calldata;
938e1010 4322
14516c3a
TM		 4323 if (!nfs4_sequence_done(task, &data->res.seq_res))
4324 return;
938e1010 4325
79708861
RL		 4326 switch (task->tk_status) {
4327 case -NFS4ERR_STALE_STATEID:
4328 case -NFS4ERR_EXPIRED:
4329 case 0:
fa178f29 4330 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4331 break;
4332 default:
4333 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4334 -EAGAIN) {
d00c5d43 4335 rpc_restart_call_prepare(task);
79708861
RL		 4336 return;
4337 }
4338 }
4339 data->rpc_status = task->tk_status;
fe650407
TM		 4340}
4341
4342static void nfs4_delegreturn_release(void *calldata)
4343{
fe650407
TM		 4344 kfree(calldata);
4345}
4346
938e1010
AA		 4347#if defined(CONFIG_NFS_V4_1)
4348static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4349{
4350 struct nfs4_delegreturndata *d_data;
4351
4352 d_data = (struct nfs4_delegreturndata *)data;
4353
d9afbd1b
TM		 4354 nfs4_setup_sequence(d_data->res.server,
4355 &d_data->args.seq_args,
4356 &d_data->res.seq_res,
4357 task);
938e1010
AA		 4358}
4359#endif /* CONFIG_NFS_V4_1 */
4360
c8d149f3 4361static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4362#if defined(CONFIG_NFS_V4_1)
4363 .rpc_call_prepare = nfs4_delegreturn_prepare,
4364#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4365 .rpc_call_done = nfs4_delegreturn_done,
4366 .rpc_release = nfs4_delegreturn_release,
4367};
4368
e6f81075 4369static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4370{
4371 struct nfs4_delegreturndata *data;
fa178f29 4372 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4373 struct rpc_task *task;
5138fde0
TM		 4374 struct rpc_message msg = {
4375 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4376 .rpc_cred = cred,
4377 };
c970aa85
TM		 4378 struct rpc_task_setup task_setup_data = {
4379 .rpc_client = server->client,
5138fde0 4380 .rpc_message = &msg,
c970aa85
TM		 4381 .callback_ops = &nfs4_delegreturn_ops,
4382 .flags = RPC_TASK_ASYNC,
4383 };
e6f81075 4384 int status = 0;
fe650407 4385
8535b2be 4386 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4387 if (data == NULL)
4388 return -ENOMEM;
9d12b216 4389 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4390 data->args.fhandle = &data->fh;
4391 data->args.stateid = &data->stateid;
9e907fec 4392 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4393 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4394 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4395 data->res.fattr = &data->fattr;
4396 data->res.server = server;
5138fde0 4397 nfs_fattr_init(data->res.fattr);
26e976a8 4398 data->timestamp = jiffies;
fe650407
TM		 4399 data->rpc_status = 0;
4400
c970aa85 4401 task_setup_data.callback_data = data;
1174dd1f
TM		 4402 msg.rpc_argp = &data->args;
4403 msg.rpc_resp = &data->res;
c970aa85 4404 task = rpc_run_task(&task_setup_data);
7a1218a2 4405 if (IS_ERR(task))
fe650407 4406 return PTR_ERR(task);
e6f81075
TM		 4407 if (!issync)
4408 goto out;
fe650407 4409 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4410 if (status != 0)
4411 goto out;
4412 status = data->rpc_status;
e144cbcc
TM		 4413 if (status == 0)
4414 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4415 else
4416 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4417out:
e6b3c4db 4418 rpc_put_task(task);
fe650407 4419 return status;
1da177e4
LT		 4420}
4421
e6f81075 4422int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4423{
4424 struct nfs_server *server = NFS_SERVER(inode);
4425 struct nfs4_exception exception = { };
4426 int err;
4427 do {
e6f81075 4428 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4429 switch (err) {
4430 case -NFS4ERR_STALE_STATEID:
4431 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4432 case 0:
4433 return 0;
4434 }
4435 err = nfs4_handle_exception(server, err, &exception);
4436 } while (exception.retry);
4437 return err;
4438}
4439
4440#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4441#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4442
4443/*
4444 * sleep, with exponential backoff, and retry the LOCK operation.
4445 */
4446static unsigned long
4447nfs4_set_lock_task_retry(unsigned long timeout)
4448{
d310310c 4449 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4450 timeout <<= 1;
4451 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4452 return NFS4_LOCK_MAXTIMEOUT;
4453 return timeout;
4454}
4455
1da177e4
LT		 4456static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4457{
4458 struct inode *inode = state->inode;
4459 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4460 struct nfs_client *clp = server->nfs_client;
911d1aaf 4461 struct nfs_lockt_args arg = {
1da177e4 4462 .fh = NFS_FH(inode),
911d1aaf 4463 .fl = request,
1da177e4 4464 };
911d1aaf
TM		 4465 struct nfs_lockt_res res = {
4466 .denied = request,
1da177e4
LT		 4467 };
4468 struct rpc_message msg = {
4469 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4470 .rpc_argp = &arg,
4471 .rpc_resp = &res,
4472 .rpc_cred = state->owner->so_cred,
4473 };
1da177e4
LT		 4474 struct nfs4_lock_state *lsp;
4475 int status;
4476
911d1aaf 4477 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4478 status = nfs4_set_lock_state(state, request);
4479 if (status != 0)
4480 goto out;
4481 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4482 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4483 arg.lock_owner.s_dev = server->s_dev;
7c513058 4484 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4485 switch (status) {
4486 case 0:
4487 request->fl_type = F_UNLCK;
4488 break;
4489 case -NFS4ERR_DENIED:
4490 status = 0;
1da177e4 4491 }
70cc6487 4492 request->fl_ops->fl_release_private(request);
8d0a8a9d 4493out:
1da177e4
LT		 4494 return status;
4495}
4496
4497static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4498{
4499 struct nfs4_exception exception = { };
4500 int err;
4501
4502 do {
4503 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4504 _nfs4_proc_getlk(state, cmd, request),
4505 &exception);
4506 } while (exception.retry);
4507 return err;
4508}
4509
4510static int do_vfs_lock(struct file *file, struct file_lock *fl)
4511{
4512 int res = 0;
4513 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4514 case FL_POSIX:
4515 res = posix_lock_file_wait(file, fl);
4516 break;
4517 case FL_FLOCK:
4518 res = flock_lock_file_wait(file, fl);
4519 break;
4520 default:
4521 BUG();
4522 }
1da177e4
LT		 4523 return res;
4524}
4525
faf5f49c 4526struct nfs4_unlockdata {
911d1aaf
TM		 4527 struct nfs_locku_args arg;
4528 struct nfs_locku_res res;
faf5f49c
TM		 4529 struct nfs4_lock_state *lsp;
4530 struct nfs_open_context *ctx;
911d1aaf
TM		 4531 struct file_lock fl;
4532 const struct nfs_server *server;
26e976a8 4533 unsigned long timestamp;
faf5f49c
TM		 4534};
4535
911d1aaf
TM		 4536static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4537 struct nfs_open_context *ctx,
4538 struct nfs4_lock_state *lsp,
4539 struct nfs_seqid *seqid)
4540{
4541 struct nfs4_unlockdata *p;
4542 struct inode *inode = lsp->ls_state->inode;
4543
8535b2be 4544 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4545 if (p == NULL)
4546 return NULL;
4547 p->arg.fh = NFS_FH(inode);
4548 p->arg.fl = &p->fl;
4549 p->arg.seqid = seqid;
c1d51931 4550 p->res.seqid = seqid;
911d1aaf
TM		 4551 p->arg.stateid = &lsp->ls_stateid;
4552 p->lsp = lsp;
4553 atomic_inc(&lsp->ls_count);
4554 /* Ensure we don't close file until we're done freeing locks! */
4555 p->ctx = get_nfs_open_context(ctx);
4556 memcpy(&p->fl, fl, sizeof(p->fl));
4557 p->server = NFS_SERVER(inode);
4558 return p;
4559}
4560
06f814a3 4561static void nfs4_locku_release_calldata(void *data)
faf5f49c 4562{
963d8fe5 4563 struct nfs4_unlockdata *calldata = data;
911d1aaf 4564 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4565 nfs4_put_lock_state(calldata->lsp);
4566 put_nfs_open_context(calldata->ctx);
4567 kfree(calldata);
faf5f49c
TM		 4568}
4569
963d8fe5 4570static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4571{
963d8fe5 4572 struct nfs4_unlockdata *calldata = data;
faf5f49c 4573
14516c3a
TM		 4574 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4575 return;
faf5f49c
TM		 4576 switch (task->tk_status) {
4577 case 0:
f597c537
TM		 4578 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4579 &calldata->res.stateid);
26e976a8 4580 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4581 break;
9e33bed5
TM		 4582 case -NFS4ERR_BAD_STATEID:
4583 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4584 case -NFS4ERR_STALE_STATEID:
4585 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4586 break;
4587 default:
9e33bed5 4588 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4589 rpc_restart_call_prepare(task);
faf5f49c 4590 }
2b1bc308 4591 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4592}
4593
4ce70ada 4594static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4595{
4ce70ada 4596 struct nfs4_unlockdata *calldata = data;
faf5f49c 4597
911d1aaf 4598 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 4599 goto out_wait;
795a88c9 4600 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 4601 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 4602 goto out_no_action;
faf5f49c 4603 }
26e976a8 4604 calldata->timestamp = jiffies;
035168ab 4605 if (nfs4_setup_sequence(calldata->server,
a893693c 4606 &calldata->arg.seq_args,
2240a9e2
TM		 4607 &calldata->res.seq_res,
4608 task) != 0)
4609 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 4610 return;
4611out_no_action:
4612 task->tk_action = NULL;
4613out_wait:
4614 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4615}
4616
963d8fe5 4617static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4618 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4619 .rpc_call_done = nfs4_locku_done,
06f814a3 4620 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4621};
4622
a5d16a4d
TM		 4623static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4624 struct nfs_open_context *ctx,
4625 struct nfs4_lock_state *lsp,
4626 struct nfs_seqid *seqid)
4627{
4628 struct nfs4_unlockdata *data;
5138fde0
TM		 4629 struct rpc_message msg = {
4630 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4631 .rpc_cred = ctx->cred,
4632 };
c970aa85
TM		 4633 struct rpc_task_setup task_setup_data = {
4634 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4635 .rpc_message = &msg,
c970aa85 4636 .callback_ops = &nfs4_locku_ops,
101070ca 4637 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4638 .flags = RPC_TASK_ASYNC,
4639 };
a5d16a4d 4640
137d6aca
FF		 4641 /* Ensure this is an unlock - when canceling a lock, the
4642 * canceled lock is passed in, and it won't be an unlock.
4643 */
4644 fl->fl_type = F_UNLCK;
4645
a5d16a4d
TM		 4646 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4647 if (data == NULL) {
4648 nfs_free_seqid(seqid);
4649 return ERR_PTR(-ENOMEM);
4650 }
4651
9d12b216 4652 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4653 msg.rpc_argp = &data->arg;
4654 msg.rpc_resp = &data->res;
c970aa85
TM		 4655 task_setup_data.callback_data = data;
4656 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4657}
4658
faf5f49c
TM		 4659static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4660{
65b62a29
TM		 4661 struct inode *inode = state->inode;
4662 struct nfs4_state_owner *sp = state->owner;
4663 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 4664 struct nfs_seqid *seqid;
1da177e4 4665 struct nfs4_lock_state *lsp;
06f814a3
TM		 4666 struct rpc_task *task;
4667 int status = 0;
536ff0f8 4668 unsigned char fl_flags = request->fl_flags;
faf5f49c 4669
8d0a8a9d 4670 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4671 /* Unlock _before_ we do the RPC call */
4672 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 4673 /* Exclude nfs_delegation_claim_locks() */
4674 mutex_lock(&sp->so_delegreturn_mutex);
4675 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 4676 down_read(&nfsi->rwsem);
4677 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4678 up_read(&nfsi->rwsem);
65b62a29 4679 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 4680 goto out;
19e03c57
TM		 4681 }
4682 up_read(&nfsi->rwsem);
65b62a29 4683 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 4684 if (status != 0)
9b073574
TM		 4685 goto out;
4686 /* Is this a delegated lock? */
4687 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4688 goto out;
8d0a8a9d 4689 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4690 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4691 status = -ENOMEM;
911d1aaf 4692 if (seqid == NULL)
9b073574 4693 goto out;
cd3758e3 4694 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4695 status = PTR_ERR(task);
4696 if (IS_ERR(task))
9b073574 4697 goto out;
a5d16a4d 4698 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4699 rpc_put_task(task);
9b073574 4700out:
536ff0f8 4701 request->fl_flags = fl_flags;
1da177e4
LT		 4702 return status;
4703}
4704
a5d16a4d
TM		 4705struct nfs4_lockdata {
4706 struct nfs_lock_args arg;
4707 struct nfs_lock_res res;
4708 struct nfs4_lock_state *lsp;
4709 struct nfs_open_context *ctx;
4710 struct file_lock fl;
26e976a8 4711 unsigned long timestamp;
a5d16a4d
TM		 4712 int rpc_status;
4713 int cancelled;
66179efe 4714 struct nfs_server *server;
a5d16a4d
TM		 4715};
4716
4717static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4718 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4719 gfp_t gfp_mask)
1da177e4 4720{
a5d16a4d
TM		 4721 struct nfs4_lockdata *p;
4722 struct inode *inode = lsp->ls_state->inode;
1da177e4 4723 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4724
8535b2be 4725 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4726 if (p == NULL)
4727 return NULL;
4728
4729 p->arg.fh = NFS_FH(inode);
4730 p->arg.fl = &p->fl;
8535b2be 4731 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4732 if (p->arg.open_seqid == NULL)
4733 goto out_free;
8535b2be 4734 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4735 if (p->arg.lock_seqid == NULL)
2f74c0a0 4736 goto out_free_seqid;
a5d16a4d 4737 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4738 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4739 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4740 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4741 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4742 p->lsp = lsp;
66179efe 4743 p->server = server;
a5d16a4d
TM		 4744 atomic_inc(&lsp->ls_count);
4745 p->ctx = get_nfs_open_context(ctx);
4746 memcpy(&p->fl, fl, sizeof(p->fl));
4747 return p;
2f74c0a0
TM		 4748out_free_seqid:
4749 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4750out_free:
4751 kfree(p);
4752 return NULL;
4753}
4754
4755static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4756{
4757 struct nfs4_lockdata *data = calldata;
4758 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4759
3110ff80 4760 dprintk("%s: begin!\n", __func__);
2f74c0a0 4761 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 4762 goto out_wait;
a5d16a4d
TM		 4763 /* Do we need to do an open_to_lock_owner? */
4764 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4765 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4766 goto out_release_lock_seqid;
8fe72bac 4767 }
a5d16a4d
TM		 4768 data->arg.open_stateid = &state->stateid;
4769 data->arg.new_lock_owner = 1;
c1d51931 4770 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4771 } else
4772 data->arg.new_lock_owner = 0;
5d422301
TM		 4773 if (!nfs4_valid_open_stateid(state)) {
4774 data->rpc_status = -EBADF;
4775 task->tk_action = NULL;
4776 goto out_release_open_seqid;
4777 }
26e976a8 4778 data->timestamp = jiffies;
035168ab
TM		 4779 if (nfs4_setup_sequence(data->server,
4780 &data->arg.seq_args,
2240a9e2 4781 &data->res.seq_res,
d9afbd1b 4782 task) == 0)
66179efe 4783 return;
5d422301 4784out_release_open_seqid:
2240a9e2
TM		 4785 nfs_release_seqid(data->arg.open_seqid);
4786out_release_lock_seqid:
4787 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 4788out_wait:
4789 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 4790 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4791}
4792
a5d16a4d
TM		 4793static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4794{
4795 struct nfs4_lockdata *data = calldata;
4796
3110ff80 4797 dprintk("%s: begin!\n", __func__);
a5d16a4d 4798
14516c3a
TM		 4799 if (!nfs4_sequence_done(task, &data->res.seq_res))
4800 return;
66179efe 4801
a5d16a4d 4802 data->rpc_status = task->tk_status;
a5d16a4d 4803 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4804 if (data->rpc_status == 0)
4805 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4806 else
4807 goto out;
4808 }
4809 if (data->rpc_status == 0) {
f597c537 4810 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4811 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4812 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4813 }
a5d16a4d 4814out:
3110ff80 4815 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4816}
4817
4818static void nfs4_lock_release(void *calldata)
4819{
4820 struct nfs4_lockdata *data = calldata;
4821
3110ff80 4822 dprintk("%s: begin!\n", __func__);
2f74c0a0 4823 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4824 if (data->cancelled != 0) {
4825 struct rpc_task *task;
4826 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4827 data->arg.lock_seqid);
4828 if (!IS_ERR(task))
bf294b41 4829 rpc_put_task_async(task);
3110ff80 4830 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4831 } else
4832 nfs_free_seqid(data->arg.lock_seqid);
4833 nfs4_put_lock_state(data->lsp);
4834 put_nfs_open_context(data->ctx);
4835 kfree(data);
3110ff80 4836 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4837}
4838
4839static const struct rpc_call_ops nfs4_lock_ops = {
4840 .rpc_call_prepare = nfs4_lock_prepare,
4841 .rpc_call_done = nfs4_lock_done,
4842 .rpc_release = nfs4_lock_release,
4843};
4844
2bee72a6
TM		 4845static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4846{
2bee72a6
TM		 4847 switch (error) {
4848 case -NFS4ERR_ADMIN_REVOKED:
4849 case -NFS4ERR_BAD_STATEID:
ecac799a 4850 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4851 if (new_lock_owner != 0 ||
795a88c9 4852 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4853 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4854 break;
4855 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4856 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4857 case -NFS4ERR_EXPIRED:
4858 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4859 };
4860}
4861
afe6c27c 4862static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4863{
4864 struct nfs4_lockdata *data;
4865 struct rpc_task *task;
5138fde0
TM		 4866 struct rpc_message msg = {
4867 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4868 .rpc_cred = state->owner->so_cred,
4869 };
c970aa85
TM		 4870 struct rpc_task_setup task_setup_data = {
4871 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4872 .rpc_message = &msg,
c970aa85 4873 .callback_ops = &nfs4_lock_ops,
101070ca 4874 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4875 .flags = RPC_TASK_ASYNC,
4876 };
a5d16a4d
TM		 4877 int ret;
4878
3110ff80 4879 dprintk("%s: begin!\n", __func__);
cd3758e3 4880 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4881 fl->fl_u.nfs4_fl.owner,
4882 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4883 if (data == NULL)
4884 return -ENOMEM;
4885 if (IS_SETLKW(cmd))
4886 data->arg.block = 1;
9d12b216 4887 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4888 msg.rpc_argp = &data->arg;
4889 msg.rpc_resp = &data->res;
c970aa85 4890 task_setup_data.callback_data = data;
8fe72bac
TM		 4891 if (recovery_type > NFS_LOCK_NEW) {
4892 if (recovery_type == NFS_LOCK_RECLAIM)
4893 data->arg.reclaim = NFS_LOCK_RECLAIM;
4894 nfs4_set_sequence_privileged(&data->arg.seq_args);
4895 }
c970aa85 4896 task = rpc_run_task(&task_setup_data);
7a1218a2 4897 if (IS_ERR(task))
a5d16a4d 4898 return PTR_ERR(task);
a5d16a4d
TM		 4899 ret = nfs4_wait_for_completion_rpc_task(task);
4900 if (ret == 0) {
4901 ret = data->rpc_status;
2bee72a6
TM		 4902 if (ret)
4903 nfs4_handle_setlk_error(data->server, data->lsp,
4904 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4905 } else
4906 data->cancelled = 1;
e6b3c4db 4907 rpc_put_task(task);
3110ff80 4908 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4909 return ret;
1da177e4
LT		 4910}
4911
4912static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4913{
202b50dc 4914 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4915 struct nfs4_exception exception = {
4916 .inode = state->inode,
4917 };
202b50dc
TM		 4918 int err;
4919
4920 do {
42a2d13e
TM		 4921 /* Cache the lock if possible... */
4922 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4923 return 0;
afe6c27c 4924 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4925 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4926 break;
4927 nfs4_handle_exception(server, err, &exception);
4928 } while (exception.retry);
4929 return err;
1da177e4
LT		 4930}
4931
4932static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4933{
202b50dc 4934 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4935 struct nfs4_exception exception = {
4936 .inode = state->inode,
4937 };
202b50dc
TM		 4938 int err;
4939
6bfc93ef
TM		 4940 err = nfs4_set_lock_state(state, request);
4941 if (err != 0)
4942 return err;
202b50dc 4943 do {
42a2d13e
TM		 4944 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4945 return 0;
afe6c27c 4946 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4947 switch (err) {
4948 default:
4949 goto out;
4950 case -NFS4ERR_GRACE:
4951 case -NFS4ERR_DELAY:
4952 nfs4_handle_exception(server, err, &exception);
4953 err = 0;
4954 }
202b50dc 4955 } while (exception.retry);
a9ed2e25 4956out:
202b50dc 4957 return err;
1da177e4
LT		 4958}
4959
f062eb6c 4960#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 4961/**
4962 * nfs41_check_expired_locks - possibly free a lock stateid
4963 *
4964 * @state: NFSv4 state for an inode
4965 *
4966 * Returns NFS_OK if recovery for this stateid is now finished.
4967 * Otherwise a negative NFS4ERR value is returned.
4968 */
b01dd1d8 4969static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4970{
eb64cf96 4971 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 4972 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4973 struct nfs_server *server = NFS_SERVER(state->inode);
4974
b01dd1d8 4975 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 4976 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 4977 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4978 if (status != NFS_OK) {
3e60ffdd
CL		 4979 /* Free the stateid unless the server
4980 * informs us the stateid is unrecognized. */
89af2739
CL		 4981 if (status != -NFS4ERR_BAD_STATEID)
4982 nfs41_free_stateid(server,
4983 &lsp->ls_stateid);
795a88c9 4984 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 4985 ret = status;
4986 }
4987 }
4988 };
4989
4990 return ret;
4991}
4992
4993static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4994{
4995 int status = NFS_OK;
4996
4997 if (test_bit(LK_STATE_IN_USE, &state->flags))
4998 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 4999 if (status != NFS_OK)
5000 status = nfs4_lock_expired(state, request);
5001 return status;
f062eb6c
BS		 5002}
5003#endif
5004
1da177e4
LT		 5005static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5006{
9a99af49 5007 struct nfs4_state_owner *sp = state->owner;
19e03c57 5008 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5009 unsigned char fl_flags = request->fl_flags;
9a99af49 5010 unsigned int seq;
8e469ebd 5011 int status = -ENOLCK;
1da177e4 5012
8e469ebd
TM		 5013 if ((fl_flags & FL_POSIX) &&
5014 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5015 goto out;
6bfc93ef 5016 /* Is this a delegated open? */
6bfc93ef
TM		 5017 status = nfs4_set_lock_state(state, request);
5018 if (status != 0)
5019 goto out;
01c3b861
TM		 5020 request->fl_flags |= FL_ACCESS;
5021 status = do_vfs_lock(request->fl_file, request);
5022 if (status < 0)
5023 goto out;
19e03c57 5024 down_read(&nfsi->rwsem);
01c3b861 5025 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5026 /* Yes: cache locks! */
01c3b861 5027 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5028 request->fl_flags = fl_flags & ~FL_SLEEP;
5029 status = do_vfs_lock(request->fl_file, request);
5030 goto out_unlock;
01c3b861 5031 }
9a99af49
TM		 5032 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5033 up_read(&nfsi->rwsem);
afe6c27c 5034 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5035 if (status != 0)
9a99af49
TM		 5036 goto out;
5037 down_read(&nfsi->rwsem);
5038 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5039 status = -NFS4ERR_DELAY;
01c3b861 5040 goto out_unlock;
9a99af49 5041 }
6bfc93ef 5042 /* Note: we always want to sleep here! */
01c3b861 5043 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5044 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5045 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5046 "manager!\n", __func__);
01c3b861 5047out_unlock:
19e03c57 5048 up_read(&nfsi->rwsem);
01c3b861
TM		 5049out:
5050 request->fl_flags = fl_flags;
1da177e4
LT		 5051 return status;
5052}
5053
5054static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5055{
a1d0b5ee
TM		 5056 struct nfs4_exception exception = {
5057 .state = state,
05ffe24f 5058 .inode = state->inode,
a1d0b5ee 5059 };
1da177e4
LT		 5060 int err;
5061
5062 do {
965b5d67
TM		 5063 err = _nfs4_proc_setlk(state, cmd, request);
5064 if (err == -NFS4ERR_DENIED)
5065 err = -EAGAIN;
1da177e4 5066 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5067 err, &exception);
1da177e4
LT		 5068 } while (exception.retry);
5069 return err;
5070}
5071
5072static int
5073nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5074{
5075 struct nfs_open_context *ctx;
5076 struct nfs4_state *state;
5077 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5078 int status;
5079
5080 /* verify open state */
cd3758e3 5081 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5082 state = ctx->state;
5083
5084 if (request->fl_start < 0 || request->fl_end < 0)
5085 return -EINVAL;
5086
d953126a
TM		 5087 if (IS_GETLK(cmd)) {
5088 if (state != NULL)
5089 return nfs4_proc_getlk(state, F_GETLK, request);
5090 return 0;
5091 }
1da177e4
LT		 5092
5093 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5094 return -EINVAL;
5095
d953126a
TM		 5096 if (request->fl_type == F_UNLCK) {
5097 if (state != NULL)
5098 return nfs4_proc_unlck(state, cmd, request);
5099 return 0;
5100 }
1da177e4 5101
d953126a
TM		 5102 if (state == NULL)
5103 return -ENOLCK;
55725513
TM		 5104 /*
5105 * Don't rely on the VFS having checked the file open mode,
5106 * since it won't do this for flock() locks.
5107 */
f44106e2 5108 switch (request->fl_type) {
55725513
TM		 5109 case F_RDLCK:
5110 if (!(filp->f_mode & FMODE_READ))
5111 return -EBADF;
5112 break;
5113 case F_WRLCK:
5114 if (!(filp->f_mode & FMODE_WRITE))
5115 return -EBADF;
5116 }
5117
1da177e4
LT		 5118 do {
5119 status = nfs4_proc_setlk(state, cmd, request);
5120 if ((status != -EAGAIN) || IS_SETLK(cmd))
5121 break;
5122 timeout = nfs4_set_lock_task_retry(timeout);
5123 status = -ERESTARTSYS;
5124 if (signalled())
5125 break;
5126 } while(status < 0);
1da177e4
LT		 5127 return status;
5128}
5129
888e694c
TM		 5130int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
5131{
5132 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5133 int err;
5134
5135 err = nfs4_set_lock_state(state, fl);
5136 if (err != 0)
5137 goto out;
4a706fa0
TM		 5138 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
5139 switch (err) {
5140 default:
5141 printk(KERN_ERR "NFS: %s: unhandled error "
5142 "%d.\n", __func__, err);
5143 case 0:
5144 case -ESTALE:
5145 goto out;
5146 case -NFS4ERR_STALE_CLIENTID:
5147 case -NFS4ERR_STALE_STATEID:
5148 set_bit(NFS_DELEGATED_STATE, &state->flags);
5149 case -NFS4ERR_EXPIRED:
5150 nfs4_schedule_lease_recovery(server->nfs_client);
5151 return -EAGAIN;
5152 case -NFS4ERR_BADSESSION:
5153 case -NFS4ERR_BADSLOT:
5154 case -NFS4ERR_BAD_HIGH_SLOT:
5155 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
5156 case -NFS4ERR_DEADSESSION:
5157 set_bit(NFS_DELEGATED_STATE, &state->flags);
5158 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
5159 return -EAGAIN;
5160 case -NFS4ERR_DELEG_REVOKED:
5161 case -NFS4ERR_ADMIN_REVOKED:
5162 case -NFS4ERR_BAD_STATEID:
5163 case -NFS4ERR_OPENMODE:
5164 nfs4_schedule_stateid_recovery(server, state);
5165 return 0;
5166 case -NFS4ERR_DELAY:
5167 case -NFS4ERR_GRACE:
5168 set_bit(NFS_DELEGATED_STATE, &state->flags);
5169 ssleep(1);
5170 return -EAGAIN;
5171 case -ENOMEM:
5172 case -NFS4ERR_DENIED:
5173 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
5174 return 0;
5175 }
888e694c
TM		 5176out:
5177 return err;
5178}
6b3b5496 5179
cf470c3e
TM		 5180struct nfs_release_lockowner_data {
5181 struct nfs4_lock_state *lsp;
5ae67c4f 5182 struct nfs_server *server;
cf470c3e
TM		 5183 struct nfs_release_lockowner_args args;
5184};
5185
d3c7b7cc
TM		 5186static void nfs4_release_lockowner_release(void *calldata)
5187{
cf470c3e 5188 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5189 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5190 kfree(calldata);
5191}
5192
17280175 5193static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5194 .rpc_release = nfs4_release_lockowner_release,
5195};
5196
cf470c3e 5197int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 5198{
5199 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 5200 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5201 struct rpc_message msg = {
5202 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5203 };
5204
5205 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5206 return -EINVAL;
5207 data = kmalloc(sizeof(*data), GFP_NOFS);
5208 if (!data)
5209 return -ENOMEM;
5210 data->lsp = lsp;
5ae67c4f 5211 data->server = server;
cf470c3e
TM		 5212 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5213 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5214 data->args.lock_owner.s_dev = server->s_dev;
5215 msg.rpc_argp = &data->args;
5216 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5217 return 0;
d3c7b7cc
TM		 5218}
5219
aa1870af
BF		 5220#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5221
64c2ce8b
AK		 5222static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5223 const void *buf, size_t buflen,
5224 int flags, int type)
6b3b5496 5225{
64c2ce8b
AK		 5226 if (strcmp(key, "") != 0)
5227 return -EINVAL;
4b580ee3 5228
64c2ce8b 5229 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5230}
5231
64c2ce8b
AK		 5232static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5233 void *buf, size_t buflen, int type)
6b3b5496 5234{
64c2ce8b
AK		 5235 if (strcmp(key, "") != 0)
5236 return -EINVAL;
aa1870af 5237
64c2ce8b 5238 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5239}
5240
64c2ce8b
AK		 5241static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5242 size_t list_len, const char *name,
5243 size_t name_len, int type)
6b3b5496 5244{
64c2ce8b 5245 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5246
096455a2
BF		 5247 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5248 return 0;
64c2ce8b
AK		 5249
5250 if (list && len <= list_len)
5251 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5252 return len;
6b3b5496
BF		 5253}
5254
533eb461
AA		 5255/*
5256 * nfs_fhget will use either the mounted_on_fileid or the fileid
5257 */
69aaaae1
TM		 5258static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5259{
533eb461
AA		 5260 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5261 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5262 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5263 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5264 return;
5265
5266 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5267 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5268 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5269 fattr->nlink = 2;
5270}
5271
f05d147f
BS		 5272static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5273 const struct qstr *name,
5274 struct nfs4_fs_locations *fs_locations,
5275 struct page *page)
683b57b4
TM		 5276{
5277 struct nfs_server *server = NFS_SERVER(dir);
5278 u32 bitmask[2] = {
361e624f 5279 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5280 };
5281 struct nfs4_fs_locations_arg args = {
5282 .dir_fh = NFS_FH(dir),
c228fd3a 5283 .name = name,
683b57b4
TM		 5284 .page = page,
5285 .bitmask = bitmask,
5286 };
22958463
BH		 5287 struct nfs4_fs_locations_res res = {
5288 .fs_locations = fs_locations,
5289 };
683b57b4
TM		 5290 struct rpc_message msg = {
5291 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5292 .rpc_argp = &args,
22958463 5293 .rpc_resp = &res,
683b57b4
TM		 5294 };
5295 int status;
5296
3110ff80 5297 dprintk("%s: start\n", __func__);
533eb461
AA		 5298
5299 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5300 * is not supported */
5301 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5302 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5303 else
5304 bitmask[0] |= FATTR4_WORD0_FILEID;
5305
c228fd3a 5306 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5307 fs_locations->server = server;
830b8e33 5308 fs_locations->nlocations = 0;
f05d147f 5309 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5310 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5311 return status;
5312}
5313
f05d147f
BS		 5314int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5315 const struct qstr *name,
5316 struct nfs4_fs_locations *fs_locations,
5317 struct page *page)
db0a9593
BS		 5318{
5319 struct nfs4_exception exception = { };
5320 int err;
5321 do {
5322 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5323 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5324 &exception);
5325 } while (exception.retry);
5326 return err;
5327}
5328
5a5ea0d4
BS		 5329static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5330{
5331 int status;
5332 struct nfs4_secinfo_arg args = {
5333 .dir_fh = NFS_FH(dir),
5334 .name = name,
5335 };
5336 struct nfs4_secinfo_res res = {
5337 .flavors = flavors,
5338 };
5339 struct rpc_message msg = {
5340 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5341 .rpc_argp = &args,
5342 .rpc_resp = &res,
5343 };
5344
5345 dprintk("NFS call secinfo %s\n", name->name);
5346 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5347 dprintk("NFS reply secinfo: %d\n", status);
5348 return status;
5349}
5350
72de53ec
BS		 5351int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5352 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5353{
5354 struct nfs4_exception exception = { };
5355 int err;
5356 do {
5357 err = nfs4_handle_exception(NFS_SERVER(dir),
5358 _nfs4_proc_secinfo(dir, name, flavors),
5359 &exception);
5360 } while (exception.retry);
5361 return err;
5362}
5363
557134a3 5364#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5365/*
5366 * Check the exchange flags returned by the server for invalid flags, having
5367 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5368 * DS flags set.
5369 */
5370static int nfs4_check_cl_exchange_flags(u32 flags)
5371{
5372 if (flags & ~EXCHGID4_FLAG_MASK_R)
5373 goto out_inval;
5374 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5375 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5376 goto out_inval;
5377 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5378 goto out_inval;
5379 return NFS_OK;
5380out_inval:
5381 return -NFS4ERR_INVAL;
5382}
5383
78fe0f41 5384static bool
79d4e1f0
CL		 5385nfs41_same_server_scope(struct nfs41_server_scope *a,
5386 struct nfs41_server_scope *b)
78fe0f41
WAA		 5387{
5388 if (a->server_scope_sz == b->server_scope_sz &&
5389 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5390 return true;
5391
5392 return false;
5393}
5394
7c44f1ae
WAA		 5395/*
5396 * nfs4_proc_bind_conn_to_session()
5397 *
5398 * The 4.1 client currently uses the same TCP connection for the
5399 * fore and backchannel.
5400 */
2cf047c9 5401int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5402{
5403 int status;
5404 struct nfs41_bind_conn_to_session_res res;
5405 struct rpc_message msg = {
5406 .rpc_proc =
5407 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5408 .rpc_argp = clp,
5409 .rpc_resp = &res,
2cf047c9 5410 .rpc_cred = cred,
7c44f1ae
WAA		 5411 };
5412
5413 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5414
5415 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5416 if (unlikely(res.session == NULL)) {
5417 status = -ENOMEM;
5418 goto out;
5419 }
5420
5421 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5422 if (status == 0) {
5423 if (memcmp(res.session->sess_id.data,
5424 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5425 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5426 status = -EIO;
5427 goto out_session;
5428 }
5429 if (res.dir != NFS4_CDFS4_BOTH) {
5430 dprintk("NFS: %s: Unexpected direction from server\n",
5431 __func__);
5432 status = -EIO;
5433 goto out_session;
5434 }
5435 if (res.use_conn_in_rdma_mode) {
5436 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5437 __func__);
5438 status = -EIO;
5439 goto out_session;
5440 }
5441 }
5442out_session:
5443 kfree(res.session);
5444out:
5445 dprintk("<-- %s status= %d\n", __func__, status);
5446 return status;
5447}
5448
99fe60d0
BH		 5449/*
5450 * nfs4_proc_exchange_id()
5451 *
6bbb4ae8
CL		 5452 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5453 *
99fe60d0
BH		 5454 * Since the clientid has expired, all compounds using sessions
5455 * associated with the stale clientid will be returning
5456 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5457 * be in some phase of session reset.
5458 */
4d643d1d 5459int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5460{
5461 nfs4_verifier verifier;
5462 struct nfs41_exchange_id_args args = {
cd93710e 5463 .verifier = &verifier,
99fe60d0 5464 .client = clp,
357f54d6 5465 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5466 };
5467 struct nfs41_exchange_id_res res = {
32b01310 5468 0
99fe60d0
BH		 5469 };
5470 int status;
5471 struct rpc_message msg = {
5472 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5473 .rpc_argp = &args,
5474 .rpc_resp = &res,
5475 .rpc_cred = cred,
5476 };
99fe60d0 5477
f092075d 5478 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5479 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5480 sizeof(args.id));
6bbb4ae8
CL		 5481 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5482 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5483 args.id_len, args.id);
99fe60d0 5484
acdeb69d 5485 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5486 GFP_NOFS);
acdeb69d 5487 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5488 status = -ENOMEM;
5489 goto out;
5490 }
78fe0f41 5491
79d4e1f0 5492 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5493 GFP_NOFS);
177313f1 5494 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5495 status = -ENOMEM;
acdeb69d 5496 goto out_server_owner;
abe9a6d5 5497 }
78fe0f41 5498
bbafffd2 5499 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5500 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5501 status = -ENOMEM;
5502 goto out_server_scope;
5503 }
5504
1bd714f2 5505 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5506 if (status == 0)
32b01310 5507 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5508
acdeb69d 5509 if (status == 0) {
32b01310
TM		 5510 clp->cl_clientid = res.clientid;
5511 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5512 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5513 clp->cl_seqid = res.seqid;
5514
acdeb69d
CL		 5515 kfree(clp->cl_serverowner);
5516 clp->cl_serverowner = res.server_owner;
5517 res.server_owner = NULL;
78fe0f41 5518
7d2ed9ac 5519 /* use the most recent implementation id */
59155546
CL		 5520 kfree(clp->cl_implid);
5521 clp->cl_implid = res.impl_id;
7d2ed9ac 5522
177313f1 5523 if (clp->cl_serverscope != NULL &&
79d4e1f0 5524 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5525 res.server_scope)) {
5526 dprintk("%s: server_scope mismatch detected\n",
5527 __func__);
5528 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5529 kfree(clp->cl_serverscope);
5530 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5531 }
5532
177313f1 5533 if (clp->cl_serverscope == NULL) {
79d4e1f0 5534 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5535 goto out;
5536 }
32b01310
TM		 5537 } else
5538 kfree(res.impl_id);
7d2ed9ac 5539
acdeb69d
CL		 5540out_server_owner:
5541 kfree(res.server_owner);
7d2ed9ac 5542out_server_scope:
abe9a6d5
WAA		 5543 kfree(res.server_scope);
5544out:
177313f1 5545 if (clp->cl_implid != NULL)
6bbb4ae8 5546 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5547 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5548 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5549 clp->cl_implid->date.seconds,
5550 clp->cl_implid->date.nseconds);
6bbb4ae8 5551 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5552 return status;
5553}
5554
66245539
TM		 5555static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5556 struct rpc_cred *cred)
5557{
5558 struct rpc_message msg = {
5559 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5560 .rpc_argp = clp,
5561 .rpc_cred = cred,
5562 };
5563 int status;
5564
5565 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5566 if (status)
02c67525 5567 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5568 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5569 return status;
5570}
5571
5572static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5573 struct rpc_cred *cred)
5574{
5575 unsigned int loop;
5576 int ret;
5577
5578 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5579 ret = _nfs4_proc_destroy_clientid(clp, cred);
5580 switch (ret) {
5581 case -NFS4ERR_DELAY:
5582 case -NFS4ERR_CLIENTID_BUSY:
5583 ssleep(1);
5584 break;
5585 default:
5586 return ret;
5587 }
5588 }
5589 return 0;
5590}
5591
5592int nfs4_destroy_clientid(struct nfs_client *clp)
5593{
5594 struct rpc_cred *cred;
5595 int ret = 0;
5596
5597 if (clp->cl_mvops->minor_version < 1)
5598 goto out;
5599 if (clp->cl_exchange_flags == 0)
5600 goto out;
05f4c350
CL		 5601 if (clp->cl_preserve_clid)
5602 goto out;
66245539
TM		 5603 cred = nfs4_get_exchange_id_cred(clp);
5604 ret = nfs4_proc_destroy_clientid(clp, cred);
5605 if (cred)
5606 put_rpccred(cred);
5607 switch (ret) {
5608 case 0:
5609 case -NFS4ERR_STALE_CLIENTID:
5610 clp->cl_exchange_flags = 0;
5611 }
5612out:
5613 return ret;
5614}
5615
2050f0cc
AA		 5616struct nfs4_get_lease_time_data {
5617 struct nfs4_get_lease_time_args *args;
5618 struct nfs4_get_lease_time_res *res;
5619 struct nfs_client *clp;
5620};
5621
5622static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5623 void *calldata)
5624{
2050f0cc
AA		 5625 struct nfs4_get_lease_time_data *data =
5626 (struct nfs4_get_lease_time_data *)calldata;
5627
5628 dprintk("--> %s\n", __func__);
5629 /* just setup sequence, do not trigger session recovery
5630 since we're invoked within one */
d9afbd1b
TM		 5631 nfs41_setup_sequence(data->clp->cl_session,
5632 &data->args->la_seq_args,
5633 &data->res->lr_seq_res,
5634 task);
2050f0cc
AA		 5635 dprintk("<-- %s\n", __func__);
5636}
5637
5638/*
5639 * Called from nfs4_state_manager thread for session setup, so don't recover
5640 * from sequence operation or clientid errors.
5641 */
5642static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5643{
5644 struct nfs4_get_lease_time_data *data =
5645 (struct nfs4_get_lease_time_data *)calldata;
5646
5647 dprintk("--> %s\n", __func__);
14516c3a
TM		 5648 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5649 return;
2050f0cc
AA		 5650 switch (task->tk_status) {
5651 case -NFS4ERR_DELAY:
5652 case -NFS4ERR_GRACE:
5653 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5654 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5655 task->tk_status = 0;
a8a4ae3a
AA		 5656 /* fall through */
5657 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5658 rpc_restart_call_prepare(task);
2050f0cc
AA		 5659 return;
5660 }
2050f0cc
AA		 5661 dprintk("<-- %s\n", __func__);
5662}
5663
17280175 5664static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5665 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5666 .rpc_call_done = nfs4_get_lease_time_done,
5667};
5668
5669int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5670{
5671 struct rpc_task *task;
5672 struct nfs4_get_lease_time_args args;
5673 struct nfs4_get_lease_time_res res = {
5674 .lr_fsinfo = fsinfo,
5675 };
5676 struct nfs4_get_lease_time_data data = {
5677 .args = &args,
5678 .res = &res,
5679 .clp = clp,
5680 };
5681 struct rpc_message msg = {
5682 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5683 .rpc_argp = &args,
5684 .rpc_resp = &res,
5685 };
5686 struct rpc_task_setup task_setup = {
5687 .rpc_client = clp->cl_rpcclient,
5688 .rpc_message = &msg,
5689 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5690 .callback_data = &data,
5691 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5692 };
5693 int status;
5694
9d12b216 5695 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5696 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5697 dprintk("--> %s\n", __func__);
5698 task = rpc_run_task(&task_setup);
5699
5700 if (IS_ERR(task))
5701 status = PTR_ERR(task);
5702 else {
5703 status = task->tk_status;
5704 rpc_put_task(task);
5705 }
5706 dprintk("<-- %s return %d\n", __func__, status);
5707
5708 return status;
5709}
5710
fc931582
AA		 5711/*
5712 * Initialize the values to be used by the client in CREATE_SESSION
5713 * If nfs4_init_session set the fore channel request and response sizes,
5714 * use them.
5715 *
5716 * Set the back channel max_resp_sz_cached to zero to force the client to
5717 * always set csa_cachethis to FALSE because the current implementation
5718 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5719 */
5720static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5721{
5722 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5723 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5724 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5725
5726 if (mxrqst_sz == 0)
5727 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5728 if (mxresp_sz == 0)
5729 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5730 /* Fore channel attributes */
fc931582
AA		 5731 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5732 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5733 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5734 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5735
5736 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5737 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5738 __func__,
5739 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5740 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5741
5742 /* Back channel attributes */
fc931582
AA		 5743 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5744 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5745 args->bc_attrs.max_resp_sz_cached = 0;
5746 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5747 args->bc_attrs.max_reqs = 1;
5748
5749 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5750 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5751 __func__,
5752 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5753 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5754 args->bc_attrs.max_reqs);
5755}
5756
43c2e885 5757static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5758{
43c2e885
BF		 5759 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5760 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5761
43c2e885
BF		 5762 if (rcvd->max_resp_sz > sent->max_resp_sz)
5763 return -EINVAL;
5764 /*
5765 * Our requested max_ops is the minimum we need; we're not
5766 * prepared to break up compounds into smaller pieces than that.
5767 * So, no point even trying to continue if the server won't
5768 * cooperate:
5769 */
5770 if (rcvd->max_ops < sent->max_ops)
5771 return -EINVAL;
5772 if (rcvd->max_reqs == 0)
5773 return -EINVAL;
b4b9a0c1
VG		 5774 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5775 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5776 return 0;
8d35301d
AA		 5777}
5778
43c2e885
BF		 5779static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5780{
5781 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5782 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5783
43c2e885
BF		 5784 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5785 return -EINVAL;
5786 if (rcvd->max_resp_sz < sent->max_resp_sz)
5787 return -EINVAL;
5788 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5789 return -EINVAL;
5790 /* These would render the backchannel useless: */
b4b9a0c1 5791 if (rcvd->max_ops != sent->max_ops)
43c2e885 5792 return -EINVAL;
b4b9a0c1 5793 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5794 return -EINVAL;
5795 return 0;
5796}
8d35301d 5797
8d35301d
AA		 5798static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5799 struct nfs4_session *session)
5800{
43c2e885 5801 int ret;
8d35301d 5802
43c2e885
BF		 5803 ret = nfs4_verify_fore_channel_attrs(args, session);
5804 if (ret)
5805 return ret;
5806 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5807}
5808
848f5bda
TM		 5809static int _nfs4_proc_create_session(struct nfs_client *clp,
5810 struct rpc_cred *cred)
fc931582
AA		 5811{
5812 struct nfs4_session *session = clp->cl_session;
5813 struct nfs41_create_session_args args = {
5814 .client = clp,
5815 .cb_program = NFS4_CALLBACK,
5816 };
5817 struct nfs41_create_session_res res = {
5818 .client = clp,
5819 };
5820 struct rpc_message msg = {
5821 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5822 .rpc_argp = &args,
5823 .rpc_resp = &res,
848f5bda 5824 .rpc_cred = cred,
fc931582
AA		 5825 };
5826 int status;
5827
5828 nfs4_init_channel_attrs(&args);
0f91421e 5829 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5830
1bd714f2 5831 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5832
43095d39 5833 if (!status) {
8d35301d
AA		 5834 /* Verify the session's negotiated channel_attrs values */
5835 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5836 /* Increment the clientid slot sequence id */
5837 clp->cl_seqid++;
5838 }
5839
5840 return status;
5841}
5842
5843/*
5844 * Issues a CREATE_SESSION operation to the server.
5845 * It is the responsibility of the caller to verify the session is
5846 * expired before calling this routine.
5847 */
848f5bda 5848int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5849{
5850 int status;
5851 unsigned *ptr;
fc931582
AA		 5852 struct nfs4_session *session = clp->cl_session;
5853
5854 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5855
848f5bda 5856 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5857 if (status)
5858 goto out;
5859
aacd5537
AA		 5860 /* Init or reset the session slot tables */
5861 status = nfs4_setup_session_slot_tables(session);
5862 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5863 if (status)
5864 goto out;
5865
5866 ptr = (unsigned *)&session->sess_id.data[0];
5867 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5868 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5869out:
5870 dprintk("<-- %s\n", __func__);
5871 return status;
5872}
5873
0f3e66c6
AA		 5874/*
5875 * Issue the over-the-wire RPC DESTROY_SESSION.
5876 * The caller must serialize access to this routine.
5877 */
848f5bda
TM		 5878int nfs4_proc_destroy_session(struct nfs4_session *session,
5879 struct rpc_cred *cred)
0f3e66c6 5880{
848f5bda
TM		 5881 struct rpc_message msg = {
5882 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5883 .rpc_argp = session,
5884 .rpc_cred = cred,
5885 };
0f3e66c6 5886 int status = 0;
0f3e66c6
AA		 5887
5888 dprintk("--> nfs4_proc_destroy_session\n");
5889
5890 /* session is still being setup */
5891 if (session->clp->cl_cons_state != NFS_CS_READY)
5892 return status;
5893
1bd714f2 5894 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5895
5896 if (status)
08106ac7 5897 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5898 "Session has been destroyed regardless...\n", status);
5899
5900 dprintk("<-- nfs4_proc_destroy_session\n");
5901 return status;
5902}
5903
fc01cea9
AA		 5904/*
5905 * Renew the cl_session lease.
5906 */
d5f8d3fe
TM		 5907struct nfs4_sequence_data {
5908 struct nfs_client *clp;
5909 struct nfs4_sequence_args args;
5910 struct nfs4_sequence_res res;
5911};
5912
dc96aef9
AB		 5913static void nfs41_sequence_release(void *data)
5914{
d5f8d3fe
TM		 5915 struct nfs4_sequence_data *calldata = data;
5916 struct nfs_client *clp = calldata->clp;
dc96aef9 5917
7135840f
AB		 5918 if (atomic_read(&clp->cl_count) > 1)
5919 nfs4_schedule_state_renewal(clp);
5920 nfs_put_client(clp);
d5f8d3fe 5921 kfree(calldata);
dc96aef9
AB		 5922}
5923
aa5190d0
TM		 5924static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5925{
5926 switch(task->tk_status) {
5927 case -NFS4ERR_DELAY:
aa5190d0
TM		 5928 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5929 return -EAGAIN;
5930 default:
0400a6b0 5931 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5932 }
5933 return 0;
5934}
5935
dc96aef9 5936static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5937{
d5f8d3fe
TM		 5938 struct nfs4_sequence_data *calldata = data;
5939 struct nfs_client *clp = calldata->clp;
fc01cea9 5940
14516c3a
TM		 5941 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5942 return;
fc01cea9
AA		 5943
5944 if (task->tk_status < 0) {
5945 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5946 if (atomic_read(&clp->cl_count) == 1)
5947 goto out;
fc01cea9 5948
aa5190d0
TM		 5949 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5950 rpc_restart_call_prepare(task);
fc01cea9
AA		 5951 return;
5952 }
5953 }
fc01cea9 5954 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5955out:
fc01cea9
AA		 5956 dprintk("<-- %s\n", __func__);
5957}
5958
5959static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5960{
d5f8d3fe
TM		 5961 struct nfs4_sequence_data *calldata = data;
5962 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5963 struct nfs4_sequence_args *args;
5964 struct nfs4_sequence_res *res;
5965
fc01cea9
AA		 5966 args = task->tk_msg.rpc_argp;
5967 res = task->tk_msg.rpc_resp;
5968
d9afbd1b 5969 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 5970}
5971
5972static const struct rpc_call_ops nfs41_sequence_ops = {
5973 .rpc_call_done = nfs41_sequence_call_done,
5974 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5975 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5976};
5977
8fe72bac
TM		 5978static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
5979 struct rpc_cred *cred,
5980 bool is_privileged)
fc01cea9 5981{
d5f8d3fe 5982 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5983 struct rpc_message msg = {
5984 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5985 .rpc_cred = cred,
5986 };
71ac6da9
TM		 5987 struct rpc_task_setup task_setup_data = {
5988 .rpc_client = clp->cl_rpcclient,
5989 .rpc_message = &msg,
8fe72bac 5990 .callback_ops = &nfs41_sequence_ops,
71ac6da9
TM		 5991 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5992 };
fc01cea9 5993
7135840f 5994 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5995 return ERR_PTR(-EIO);
dfb4f309 5996 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5997 if (calldata == NULL) {
7135840f 5998 nfs_put_client(clp);
71ac6da9 5999 return ERR_PTR(-ENOMEM);
fc01cea9 6000 }
9d12b216 6001 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6002 if (is_privileged)
6003 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6004 msg.rpc_argp = &calldata->args;
6005 msg.rpc_resp = &calldata->res;
6006 calldata->clp = clp;
71ac6da9 6007 task_setup_data.callback_data = calldata;
fc01cea9 6008
71ac6da9
TM		 6009 return rpc_run_task(&task_setup_data);
6010}
6011
2f60ea6b 6012static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6013{
6014 struct rpc_task *task;
6015 int ret = 0;
6016
2f60ea6b
TM		 6017 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6018 return 0;
8fe72bac 6019 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6020 if (IS_ERR(task))
6021 ret = PTR_ERR(task);
6022 else
bf294b41 6023 rpc_put_task_async(task);
71ac6da9
TM		 6024 dprintk("<-- %s status=%d\n", __func__, ret);
6025 return ret;
6026}
6027
6028static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6029{
6030 struct rpc_task *task;
6031 int ret;
6032
8fe72bac 6033 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6034 if (IS_ERR(task)) {
6035 ret = PTR_ERR(task);
6036 goto out;
6037 }
6038 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6039 if (!ret) {
6040 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6041
6042 if (task->tk_status == 0)
6043 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6044 ret = task->tk_status;
b4410c2f 6045 }
71ac6da9
TM		 6046 rpc_put_task(task);
6047out:
6048 dprintk("<-- %s status=%d\n", __func__, ret);
6049 return ret;
fc01cea9
AA		 6050}
6051
fce5c838
RL		 6052struct nfs4_reclaim_complete_data {
6053 struct nfs_client *clp;
6054 struct nfs41_reclaim_complete_args arg;
6055 struct nfs41_reclaim_complete_res res;
6056};
6057
6058static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6059{
6060 struct nfs4_reclaim_complete_data *calldata = data;
6061
d9afbd1b
TM		 6062 nfs41_setup_sequence(calldata->clp->cl_session,
6063 &calldata->arg.seq_args,
6064 &calldata->res.seq_res,
6065 task);
fce5c838
RL		 6066}
6067
aa5190d0
TM		 6068static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6069{
6070 switch(task->tk_status) {
6071 case 0:
6072 case -NFS4ERR_COMPLETE_ALREADY:
6073 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6074 break;
6075 case -NFS4ERR_DELAY:
aa5190d0 6076 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6077 /* fall through */
6078 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6079 return -EAGAIN;
6080 default:
0400a6b0 6081 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6082 }
6083 return 0;
6084}
6085
fce5c838
RL		 6086static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6087{
6088 struct nfs4_reclaim_complete_data *calldata = data;
6089 struct nfs_client *clp = calldata->clp;
6090 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6091
6092 dprintk("--> %s\n", __func__);
14516c3a
TM		 6093 if (!nfs41_sequence_done(task, res))
6094 return;
fce5c838 6095
aa5190d0
TM		 6096 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6097 rpc_restart_call_prepare(task);
6098 return;
6099 }
fce5c838
RL		 6100 dprintk("<-- %s\n", __func__);
6101}
6102
6103static void nfs4_free_reclaim_complete_data(void *data)
6104{
6105 struct nfs4_reclaim_complete_data *calldata = data;
6106
6107 kfree(calldata);
6108}
6109
6110static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6111 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6112 .rpc_call_done = nfs4_reclaim_complete_done,
6113 .rpc_release = nfs4_free_reclaim_complete_data,
6114};
6115
6116/*
6117 * Issue a global reclaim complete.
6118 */
6119static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6120{
6121 struct nfs4_reclaim_complete_data *calldata;
6122 struct rpc_task *task;
6123 struct rpc_message msg = {
6124 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6125 };
6126 struct rpc_task_setup task_setup_data = {
6127 .rpc_client = clp->cl_rpcclient,
6128 .rpc_message = &msg,
6129 .callback_ops = &nfs4_reclaim_complete_call_ops,
6130 .flags = RPC_TASK_ASYNC,
6131 };
6132 int status = -ENOMEM;
6133
6134 dprintk("--> %s\n", __func__);
8535b2be 6135 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6136 if (calldata == NULL)
6137 goto out;
6138 calldata->clp = clp;
6139 calldata->arg.one_fs = 0;
fce5c838 6140
9d12b216 6141 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6142 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6143 msg.rpc_argp = &calldata->arg;
6144 msg.rpc_resp = &calldata->res;
6145 task_setup_data.callback_data = calldata;
6146 task = rpc_run_task(&task_setup_data);
acf82b85 6147 if (IS_ERR(task)) {
fce5c838 6148 status = PTR_ERR(task);
acf82b85
DC		 6149 goto out;
6150 }
c34c32ea
AA		 6151 status = nfs4_wait_for_completion_rpc_task(task);
6152 if (status == 0)
6153 status = task->tk_status;
fce5c838 6154 rpc_put_task(task);
acf82b85 6155 return 0;
fce5c838
RL		 6156out:
6157 dprintk("<-- %s status=%d\n", __func__, status);
6158 return status;
6159}
b1f69b75
AA		 6160
6161static void
6162nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6163{
6164 struct nfs4_layoutget *lgp = calldata;
c31663d4 6165 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6166 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6167
6168 dprintk("--> %s\n", __func__);
c31663d4
FI		 6169 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6170 * right now covering the LAYOUTGET we are about to send.
6171 * However, that is not so catastrophic, and there seems
6172 * to be no way to prevent it completely.
6173 */
6ba7db34 6174 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6175 &lgp->res.seq_res, task))
b1f69b75 6176 return;
cf7d63f1
FI		 6177 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6178 NFS_I(lgp->args.inode)->layout,
6179 lgp->args.ctx->state)) {
6180 rpc_exit(task, NFS4_OK);
cf7d63f1 6181 }
b1f69b75
AA		 6182}
6183
6184static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6185{
6186 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6187 struct inode *inode = lgp->args.inode;
6188 struct nfs_server *server = NFS_SERVER(inode);
6189 struct pnfs_layout_hdr *lo;
6190 struct nfs4_state *state = NULL;
30005121 6191 unsigned long timeo, giveup;
b1f69b75
AA		 6192
6193 dprintk("--> %s\n", __func__);
6194
6ba7db34 6195 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6196 goto out;
b1f69b75
AA		 6197
6198 switch (task->tk_status) {
6199 case 0:
ee314c2a 6200 goto out;
b1f69b75
AA		 6201 case -NFS4ERR_LAYOUTTRYLATER:
6202 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6203 timeo = rpc_get_timeout(task->tk_client);
6204 giveup = lgp->args.timestamp + timeo;
6205 if (time_after(giveup, jiffies))
6206 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6207 break;
6208 case -NFS4ERR_EXPIRED:
6209 case -NFS4ERR_BAD_STATEID:
6210 spin_lock(&inode->i_lock);
6211 lo = NFS_I(inode)->layout;
6212 if (!lo || list_empty(&lo->plh_segs)) {
6213 spin_unlock(&inode->i_lock);
6214 /* If the open stateid was bad, then recover it. */
6215 state = lgp->args.ctx->state;
6216 } else {
6217 LIST_HEAD(head);
6218
6219 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6220 spin_unlock(&inode->i_lock);
6221 /* Mark the bad layout state as invalid, then
6222 * retry using the open stateid. */
6223 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6224 }
6225 }
ee314c2a
TM		 6226 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6227 rpc_restart_call_prepare(task);
6228out:
b1f69b75
AA		 6229 dprintk("<-- %s\n", __func__);
6230}
6231
8554116e
IK		 6232static size_t max_response_pages(struct nfs_server *server)
6233{
6234 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6235 return nfs_page_array_len(0, max_resp_sz);
6236}
6237
6238static void nfs4_free_pages(struct page **pages, size_t size)
6239{
6240 int i;
6241
6242 if (!pages)
6243 return;
6244
6245 for (i = 0; i < size; i++) {
6246 if (!pages[i])
6247 break;
6248 __free_page(pages[i]);
6249 }
6250 kfree(pages);
6251}
6252
6253static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6254{
6255 struct page **pages;
6256 int i;
6257
6258 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6259 if (!pages) {
6260 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6261 return NULL;
6262 }
6263
6264 for (i = 0; i < size; i++) {
6265 pages[i] = alloc_page(gfp_flags);
6266 if (!pages[i]) {
6267 dprintk("%s: failed to allocate page\n", __func__);
6268 nfs4_free_pages(pages, size);
6269 return NULL;
6270 }
6271 }
6272
6273 return pages;
6274}
6275
b1f69b75
AA		 6276static void nfs4_layoutget_release(void *calldata)
6277{
6278 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6279 struct inode *inode = lgp->args.inode;
6280 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6281 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6282
6283 dprintk("--> %s\n", __func__);
8554116e 6284 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6285 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6286 put_nfs_open_context(lgp->args.ctx);
6287 kfree(calldata);
6288 dprintk("<-- %s\n", __func__);
6289}
6290
6291static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6292 .rpc_call_prepare = nfs4_layoutget_prepare,
6293 .rpc_call_done = nfs4_layoutget_done,
6294 .rpc_release = nfs4_layoutget_release,
6295};
6296
a0b0a6e3
TM		 6297struct pnfs_layout_segment *
6298nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6299{
a47970ff
WAA		 6300 struct inode *inode = lgp->args.inode;
6301 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6302 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6303 struct rpc_task *task;
6304 struct rpc_message msg = {
6305 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6306 .rpc_argp = &lgp->args,
6307 .rpc_resp = &lgp->res,
6308 };
6309 struct rpc_task_setup task_setup_data = {
6310 .rpc_client = server->client,
6311 .rpc_message = &msg,
6312 .callback_ops = &nfs4_layoutget_call_ops,
6313 .callback_data = lgp,
6314 .flags = RPC_TASK_ASYNC,
6315 };
a0b0a6e3 6316 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6317 int status = 0;
6318
6319 dprintk("--> %s\n", __func__);
6320
8554116e
IK		 6321 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6322 if (!lgp->args.layout.pages) {
6323 nfs4_layoutget_release(lgp);
a0b0a6e3 6324 return ERR_PTR(-ENOMEM);
8554116e
IK		 6325 }
6326 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6327 lgp->args.timestamp = jiffies;
8554116e 6328
35124a09 6329 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6330 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6331 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6332
6333 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6334 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6335
b1f69b75
AA		 6336 task = rpc_run_task(&task_setup_data);
6337 if (IS_ERR(task))
a0b0a6e3 6338 return ERR_CAST(task);
b1f69b75 6339 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6340 if (status == 0)
6341 status = task->tk_status;
085b7a45
WAA		 6342 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6343 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6344 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6345 rpc_put_task(task);
6346 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6347 if (status)
6348 return ERR_PTR(status);
6349 return lseg;
b1f69b75
AA		 6350}
6351
cbe82603
BH		 6352static void
6353nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6354{
6355 struct nfs4_layoutreturn *lrp = calldata;
6356
6357 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6358 nfs41_setup_sequence(lrp->clp->cl_session,
6359 &lrp->args.seq_args,
6360 &lrp->res.seq_res,
6361 task);
cbe82603
BH		 6362}
6363
6364static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6365{
6366 struct nfs4_layoutreturn *lrp = calldata;
6367 struct nfs_server *server;
6368
6369 dprintk("--> %s\n", __func__);
6370
6ba7db34 6371 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6372 return;
6373
6374 server = NFS_SERVER(lrp->args.inode);
6375 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6376 rpc_restart_call_prepare(task);
cbe82603
BH		 6377 return;
6378 }
cbe82603
BH		 6379 dprintk("<-- %s\n", __func__);
6380}
6381
6382static void nfs4_layoutreturn_release(void *calldata)
6383{
6384 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6385 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6386
6387 dprintk("--> %s\n", __func__);
849b286f
TM		 6388 spin_lock(&lo->plh_inode->i_lock);
6389 if (lrp->res.lrs_present)
6390 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6391 lo->plh_block_lgets--;
6392 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6393 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6394 kfree(calldata);
6395 dprintk("<-- %s\n", __func__);
6396}
6397
6398static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6399 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6400 .rpc_call_done = nfs4_layoutreturn_done,
6401 .rpc_release = nfs4_layoutreturn_release,
6402};
6403
6404int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6405{
6406 struct rpc_task *task;
6407 struct rpc_message msg = {
6408 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6409 .rpc_argp = &lrp->args,
6410 .rpc_resp = &lrp->res,
6411 };
6412 struct rpc_task_setup task_setup_data = {
6413 .rpc_client = lrp->clp->cl_rpcclient,
6414 .rpc_message = &msg,
6415 .callback_ops = &nfs4_layoutreturn_call_ops,
6416 .callback_data = lrp,
6417 };
6418 int status;
6419
6420 dprintk("--> %s\n", __func__);
9d12b216 6421 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6422 task = rpc_run_task(&task_setup_data);
6423 if (IS_ERR(task))
6424 return PTR_ERR(task);
6425 status = task->tk_status;
6426 dprintk("<-- %s status=%d\n", __func__, status);
6427 rpc_put_task(task);
6428 return status;
6429}
6430
7f11d8d3
AA		 6431/*
6432 * Retrieve the list of Data Server devices from the MDS.
6433 */
6434static int _nfs4_getdevicelist(struct nfs_server *server,
6435 const struct nfs_fh *fh,
6436 struct pnfs_devicelist *devlist)
6437{
6438 struct nfs4_getdevicelist_args args = {
6439 .fh = fh,
6440 .layoutclass = server->pnfs_curr_ld->id,
6441 };
6442 struct nfs4_getdevicelist_res res = {
6443 .devlist = devlist,
6444 };
6445 struct rpc_message msg = {
6446 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6447 .rpc_argp = &args,
6448 .rpc_resp = &res,
6449 };
6450 int status;
6451
6452 dprintk("--> %s\n", __func__);
6453 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6454 &res.seq_res, 0);
6455 dprintk("<-- %s status=%d\n", __func__, status);
6456 return status;
6457}
6458
6459int nfs4_proc_getdevicelist(struct nfs_server *server,
6460 const struct nfs_fh *fh,
6461 struct pnfs_devicelist *devlist)
6462{
6463 struct nfs4_exception exception = { };
6464 int err;
6465
6466 do {
6467 err = nfs4_handle_exception(server,
6468 _nfs4_getdevicelist(server, fh, devlist),
6469 &exception);
6470 } while (exception.retry);
6471
6472 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6473 err, devlist->num_devs);
6474
6475 return err;
6476}
6477EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6478
b1f69b75
AA		 6479static int
6480_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6481{
6482 struct nfs4_getdeviceinfo_args args = {
6483 .pdev = pdev,
6484 };
6485 struct nfs4_getdeviceinfo_res res = {
6486 .pdev = pdev,
6487 };
6488 struct rpc_message msg = {
6489 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6490 .rpc_argp = &args,
6491 .rpc_resp = &res,
6492 };
6493 int status;
6494
6495 dprintk("--> %s\n", __func__);
7c513058 6496 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6497 dprintk("<-- %s status=%d\n", __func__, status);
6498
6499 return status;
6500}
6501
6502int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6503{
6504 struct nfs4_exception exception = { };
6505 int err;
6506
6507 do {
6508 err = nfs4_handle_exception(server,
6509 _nfs4_proc_getdeviceinfo(server, pdev),
6510 &exception);
6511 } while (exception.retry);
6512 return err;
6513}
6514EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6515
863a3c6c
AA		 6516static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6517{
6518 struct nfs4_layoutcommit_data *data = calldata;
6519 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6520 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6521
d9afbd1b
TM		 6522 nfs41_setup_sequence(session,
6523 &data->args.seq_args,
6524 &data->res.seq_res,
6525 task);
863a3c6c
AA		 6526}
6527
6528static void
6529nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6530{
6531 struct nfs4_layoutcommit_data *data = calldata;
6532 struct nfs_server *server = NFS_SERVER(data->args.inode);
6533
6ba7db34 6534 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6535 return;
6536
6537 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6538 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6539 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6540 case -NFS4ERR_BADLAYOUT: /* no layout */
6541 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6542 task->tk_status = 0;
e59d27e0
TM		 6543 break;
6544 case 0:
863a3c6c
AA		 6545 nfs_post_op_update_inode_force_wcc(data->args.inode,
6546 data->res.fattr);
e59d27e0
TM		 6547 break;
6548 default:
6549 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6550 rpc_restart_call_prepare(task);
6551 return;
6552 }
6553 }
863a3c6c
AA		 6554}
6555
6556static void nfs4_layoutcommit_release(void *calldata)
6557{
6558 struct nfs4_layoutcommit_data *data = calldata;
6559
db29c089 6560 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 6561 put_rpccred(data->cred);
6562 kfree(data);
6563}
6564
6565static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6566 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6567 .rpc_call_done = nfs4_layoutcommit_done,
6568 .rpc_release = nfs4_layoutcommit_release,
6569};
6570
6571int
ef311537 6572nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6573{
6574 struct rpc_message msg = {
6575 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6576 .rpc_argp = &data->args,
6577 .rpc_resp = &data->res,
6578 .rpc_cred = data->cred,
6579 };
6580 struct rpc_task_setup task_setup_data = {
6581 .task = &data->task,
6582 .rpc_client = NFS_CLIENT(data->args.inode),
6583 .rpc_message = &msg,
6584 .callback_ops = &nfs4_layoutcommit_ops,
6585 .callback_data = data,
6586 .flags = RPC_TASK_ASYNC,
6587 };
6588 struct rpc_task *task;
6589 int status = 0;
6590
6591 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6592 "lbw: %llu inode %lu\n",
6593 data->task.tk_pid, sync,
6594 data->args.lastbytewritten,
6595 data->args.inode->i_ino);
6596
9d12b216 6597 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6598 task = rpc_run_task(&task_setup_data);
6599 if (IS_ERR(task))
6600 return PTR_ERR(task);
ef311537 6601 if (sync == false)
863a3c6c
AA		 6602 goto out;
6603 status = nfs4_wait_for_completion_rpc_task(task);
6604 if (status != 0)
6605 goto out;
6606 status = task->tk_status;
6607out:
6608 dprintk("%s: status %d\n", __func__, status);
6609 rpc_put_task(task);
6610 return status;
6611}
fca78d6d
BS		 6612
6613static int
6614_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6615 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6616{
6617 struct nfs41_secinfo_no_name_args args = {
6618 .style = SECINFO_STYLE_CURRENT_FH,
6619 };
6620 struct nfs4_secinfo_res res = {
6621 .flavors = flavors,
6622 };
6623 struct rpc_message msg = {
6624 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6625 .rpc_argp = &args,
6626 .rpc_resp = &res,
6627 };
6628 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6629}
6630
6631static int
6632nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6633 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6634{
6635 struct nfs4_exception exception = { };
6636 int err;
6637 do {
6638 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6639 switch (err) {
6640 case 0:
6641 case -NFS4ERR_WRONGSEC:
6642 case -NFS4ERR_NOTSUPP:
05e9cfb4 6643 goto out;
fca78d6d
BS		 6644 default:
6645 err = nfs4_handle_exception(server, err, &exception);
6646 }
6647 } while (exception.retry);
05e9cfb4 6648out:
fca78d6d
BS		 6649 return err;
6650}
6651
6652static int
6653nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6654 struct nfs_fsinfo *info)
6655{
6656 int err;
6657 struct page *page;
6658 rpc_authflavor_t flavor;
6659 struct nfs4_secinfo_flavors *flavors;
6660
6661 page = alloc_page(GFP_KERNEL);
6662 if (!page) {
6663 err = -ENOMEM;
6664 goto out;
6665 }
6666
6667 flavors = page_address(page);
6668 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6669
6670 /*
6671 * Fall back on "guess and check" method if
6672 * the server doesn't support SECINFO_NO_NAME
6673 */
6674 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6675 err = nfs4_find_root_sec(server, fhandle, info);
6676 goto out_freepage;
6677 }
6678 if (err)
6679 goto out_freepage;
6680
6681 flavor = nfs_find_best_sec(flavors);
6682 if (err == 0)
6683 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6684
6685out_freepage:
6686 put_page(page);
6687 if (err == -EACCES)
6688 return -EPERM;
6689out:
6690 return err;
6691}
1cab0652
BS		 6692
6693static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6694{
6695 int status;
6696 struct nfs41_test_stateid_args args = {
1cab0652 6697 .stateid = stateid,
7d974794
BS		 6698 };
6699 struct nfs41_test_stateid_res res;
6700 struct rpc_message msg = {
6701 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6702 .rpc_argp = &args,
6703 .rpc_resp = &res,
6704 };
1cab0652 6705
38527b15 6706 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6707 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6708 nfs4_set_sequence_privileged(&args.seq_args);
6709 status = nfs4_call_sync_sequence(server->client, server, &msg,
6710 &args.seq_args, &res.seq_res);
38527b15
CL		 6711 if (status != NFS_OK) {
6712 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6713 return status;
38527b15
CL		 6714 }
6715 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6716 return -res.status;
7d974794
BS		 6717}
6718
38527b15
CL		 6719/**
6720 * nfs41_test_stateid - perform a TEST_STATEID operation
6721 *
6722 * @server: server / transport on which to perform the operation
6723 * @stateid: state ID to test
6724 *
6725 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6726 * Otherwise a negative NFS4ERR value is returned if the operation
6727 * failed or the state ID is not currently valid.
6728 */
1cab0652 6729static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6730{
6731 struct nfs4_exception exception = { };
6732 int err;
6733 do {
377e507d
CL		 6734 err = _nfs41_test_stateid(server, stateid);
6735 if (err != -NFS4ERR_DELAY)
6736 break;
6737 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6738 } while (exception.retry);
6739 return err;
6740}
9aeda35f 6741
1cab0652 6742static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6743{
9aeda35f 6744 struct nfs41_free_stateid_args args = {
1cab0652 6745 .stateid = stateid,
9aeda35f
BS		 6746 };
6747 struct nfs41_free_stateid_res res;
6748 struct rpc_message msg = {
6749 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6750 .rpc_argp = &args,
6751 .rpc_resp = &res,
6752 };
38527b15 6753 int status;
9aeda35f 6754
38527b15 6755 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6756 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 6757 nfs4_set_sequence_privileged(&args.seq_args);
38527b15 6758 status = nfs4_call_sync_sequence(server->client, server, &msg,
8fe72bac 6759 &args.seq_args, &res.seq_res);
38527b15
CL		 6760 dprintk("NFS reply free_stateid: %d\n", status);
6761 return status;
9aeda35f
BS		 6762}
6763
38527b15
CL		 6764/**
6765 * nfs41_free_stateid - perform a FREE_STATEID operation
6766 *
6767 * @server: server / transport on which to perform the operation
6768 * @stateid: state ID to release
6769 *
6770 * Returns NFS_OK if the server freed "stateid". Otherwise a
6771 * negative NFS4ERR value is returned.
6772 */
1cab0652 6773static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6774{
6775 struct nfs4_exception exception = { };
6776 int err;
6777 do {
377e507d
CL		 6778 err = _nfs4_free_stateid(server, stateid);
6779 if (err != -NFS4ERR_DELAY)
6780 break;
6781 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6782 } while (exception.retry);
6783 return err;
6784}
36281caa
TM		 6785
6786static bool nfs41_match_stateid(const nfs4_stateid *s1,
6787 const nfs4_stateid *s2)
6788{
2d2f24ad 6789 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6790 return false;
6791
2d2f24ad 6792 if (s1->seqid == s2->seqid)
36281caa 6793 return true;
2d2f24ad 6794 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6795 return true;
6796
6797 return false;
6798}
6799
557134a3
AA		 6800#endif /* CONFIG_NFS_V4_1 */
6801
36281caa
TM		 6802static bool nfs4_match_stateid(const nfs4_stateid *s1,
6803 const nfs4_stateid *s2)
6804{
f597c537 6805 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6806}
6807
6808
17280175 6809static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6810 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6811 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6812 .recover_open = nfs4_open_reclaim,
6813 .recover_lock = nfs4_lock_reclaim,
591d71cb 6814 .establish_clid = nfs4_init_clientid,
90a16617 6815 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6816 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6817};
6818
591d71cb 6819#if defined(CONFIG_NFS_V4_1)
17280175 6820static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6821 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6822 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6823 .recover_open = nfs4_open_reclaim,
6824 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6825 .establish_clid = nfs41_init_clientid,
b4b82607 6826 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6827 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6828 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6829};
6830#endif /* CONFIG_NFS_V4_1 */
6831
17280175 6832static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6833 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6834 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6835 .recover_open = nfs4_open_expired,
6836 .recover_lock = nfs4_lock_expired,
6837 .establish_clid = nfs4_init_clientid,
90a16617 6838 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6839};
6840
6841#if defined(CONFIG_NFS_V4_1)
17280175 6842static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6843 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6844 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6845 .recover_open = nfs41_open_expired,
6846 .recover_lock = nfs41_lock_expired,
4d643d1d 6847 .establish_clid = nfs41_init_clientid,
b4b82607 6848 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6849};
591d71cb 6850#endif /* CONFIG_NFS_V4_1 */
1da177e4 6851
17280175 6852static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6853 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6854 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6855 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6856};
6857
6858#if defined(CONFIG_NFS_V4_1)
17280175 6859static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6860 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6861 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6862 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6863};
6864#endif
6865
97dc1359
TM		 6866static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6867 .minor_version = 0,
39c6daae
TM		 6868 .init_caps = NFS_CAP_READDIRPLUS
6869 | NFS_CAP_ATOMIC_OPEN
6870 | NFS_CAP_CHANGE_ATTR
6871 | NFS_CAP_POSIX_LOCK,
97dc1359 6872 .call_sync = _nfs4_call_sync,
36281caa 6873 .match_stateid = nfs4_match_stateid,
fca78d6d 6874 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6875 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6876 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6877 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6878};
6879
6880#if defined(CONFIG_NFS_V4_1)
6881static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6882 .minor_version = 1,
39c6daae
TM		 6883 .init_caps = NFS_CAP_READDIRPLUS
6884 | NFS_CAP_ATOMIC_OPEN
6885 | NFS_CAP_CHANGE_ATTR
3b66486c 6886 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 6887 | NFS_CAP_STATEID_NFSV41
6888 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 6889 .call_sync = nfs4_call_sync_sequence,
36281caa 6890 .match_stateid = nfs41_match_stateid,
fca78d6d 6891 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6892 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6893 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6894 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6895};
6896#endif
6897
97dc1359
TM		 6898const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6899 [0] = &nfs_v4_0_minor_ops,
6900#if defined(CONFIG_NFS_V4_1)
6901 [1] = &nfs_v4_1_minor_ops,
6902#endif
6903};
6904
73a79706
BS		 6905const struct inode_operations nfs4_dir_inode_operations = {
6906 .create = nfs_create,
6907 .lookup = nfs_lookup,
6908 .atomic_open = nfs_atomic_open,
6909 .link = nfs_link,
6910 .unlink = nfs_unlink,
6911 .symlink = nfs_symlink,
6912 .mkdir = nfs_mkdir,
6913 .rmdir = nfs_rmdir,
6914 .mknod = nfs_mknod,
6915 .rename = nfs_rename,
6916 .permission = nfs_permission,
6917 .getattr = nfs_getattr,
6918 .setattr = nfs_setattr,
6919 .getxattr = generic_getxattr,
6920 .setxattr = generic_setxattr,
6921 .listxattr = generic_listxattr,
6922 .removexattr = generic_removexattr,
6923};
6924
92e1d5be 6925static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6926 .permission = nfs_permission,
6927 .getattr = nfs_getattr,
6928 .setattr = nfs_setattr,
64c2ce8b
AK		 6929 .getxattr = generic_getxattr,
6930 .setxattr = generic_setxattr,
6931 .listxattr = generic_listxattr,
6932 .removexattr = generic_removexattr,
6b3b5496
BF		 6933};
6934
509de811 6935const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6936 .version = 4, /* protocol version */
6937 .dentry_ops = &nfs4_dentry_operations,
6938 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6939 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6940 .file_ops = &nfs4_file_operations,
1da177e4 6941 .getroot = nfs4_proc_get_root,
281cad46 6942 .submount = nfs4_submount,
ff9099f2 6943 .try_mount = nfs4_try_mount,
1da177e4
LT		 6944 .getattr = nfs4_proc_getattr,
6945 .setattr = nfs4_proc_setattr,
6946 .lookup = nfs4_proc_lookup,
6947 .access = nfs4_proc_access,
6948 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6949 .create = nfs4_proc_create,
6950 .remove = nfs4_proc_remove,
6951 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6952 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6953 .unlink_done = nfs4_proc_unlink_done,
6954 .rename = nfs4_proc_rename,
d3d4152a 6955 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6956 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6957 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6958 .link = nfs4_proc_link,
6959 .symlink = nfs4_proc_symlink,
6960 .mkdir = nfs4_proc_mkdir,
6961 .rmdir = nfs4_proc_remove,
6962 .readdir = nfs4_proc_readdir,
6963 .mknod = nfs4_proc_mknod,
6964 .statfs = nfs4_proc_statfs,
6965 .fsinfo = nfs4_proc_fsinfo,
6966 .pathconf = nfs4_proc_pathconf,
e9326dca 6967 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6968 .decode_dirent = nfs4_decode_dirent,
6969 .read_setup = nfs4_proc_read_setup,
1abb5088 6970 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 6971 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6972 .read_done = nfs4_read_done,
1da177e4 6973 .write_setup = nfs4_proc_write_setup,
57208fa7 6974 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 6975 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6976 .write_done = nfs4_write_done,
1da177e4 6977 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 6978 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 6979 .commit_done = nfs4_commit_done,
1da177e4 6980 .lock = nfs4_proc_lock,
e50a1c2e 6981 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6982 .close_context = nfs4_close_context,
2b484297 6983 .open_context = nfs4_atomic_open,
011e2a7f 6984 .have_delegation = nfs4_have_delegation,
57ec14c5 6985 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 6986 .alloc_client = nfs4_alloc_client,
45a52a02 6987 .init_client = nfs4_init_client,
cdb7eced 6988 .free_client = nfs4_free_client,
1179acc6
BS		 6989 .create_server = nfs4_create_server,
6990 .clone_server = nfs_clone_server,
1da177e4
LT		 6991};
6992
64c2ce8b
AK		 6993static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6994 .prefix = XATTR_NAME_NFSV4_ACL,
6995 .list = nfs4_xattr_list_nfs4_acl,
6996 .get = nfs4_xattr_get_nfs4_acl,
6997 .set = nfs4_xattr_set_nfs4_acl,
6998};
6999
7000const struct xattr_handler *nfs4_xattr_handlers[] = {
7001 &nfs4_xattr_nfs4_acl_handler,
7002 NULL
7003};
7004
1da177e4
LT		 7005/*
7006 * Local variables:
7007 * c-basic-offset: 8
7008 * End:
7009 */
Linux 6.x block layer and io_uring tree(s)