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NFSv4.1: Always clear the NFS_INO_LAYOUTCOMMIT in layoutreturn
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4
LT		 68
69#define NFSDBG_FACILITY NFSDBG_PROC
70
2066fe89 71#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 72#define NFS4_POLL_RETRY_MAX (15*HZ)
73
cdd4e68b 74struct nfs4_opendata;
864472e9 75static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 76static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 77static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 78static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 79static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
bae36241 80static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
9936781d 81static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 82static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
83 struct nfs_fattr *fattr, struct iattr *sattr,
84 struct nfs4_state *state);
f062eb6c 85#ifdef CONFIG_NFS_V4_1
1cab0652
BS		 86static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
87static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
f062eb6c 88#endif
1da177e4 89/* Prevent leaks of NFSv4 errors into userland */
46f72f57 90static int nfs4_map_errors(int err)
1da177e4 91{
52567b03
TM		 92 if (err >= -1000)
93 return err;
94 switch (err) {
95 case -NFS4ERR_RESOURCE:
30005121
WAA		 96 case -NFS4ERR_LAYOUTTRYLATER:
97 case -NFS4ERR_RECALLCONFLICT:
52567b03 98 return -EREMOTEIO;
7ebb9315
BS		 99 case -NFS4ERR_WRONGSEC:
100 return -EPERM;
3ddeb7c5
TM		 101 case -NFS4ERR_BADOWNER:
102 case -NFS4ERR_BADNAME:
103 return -EINVAL;
fb13bfa7
TM		 104 case -NFS4ERR_SHARE_DENIED:
105 return -EACCES;
f25efd85
SD		 106 case -NFS4ERR_MINOR_VERS_MISMATCH:
107 return -EPROTONOSUPPORT;
6168f62c
WAA		 108 case -NFS4ERR_ACCESS:
109 return -EACCES;
52567b03 110 default:
1da177e4 111 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 112 __func__, -err);
52567b03 113 break;
1da177e4 114 }
52567b03 115 return -EIO;
1da177e4
LT		 116}
117
118/*
119 * This is our standard bitmap for GETATTR requests.
120 */
1549210f 121const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 122 FATTR4_WORD0_TYPE
123 | FATTR4_WORD0_CHANGE
124 | FATTR4_WORD0_SIZE
125 | FATTR4_WORD0_FSID
126 | FATTR4_WORD0_FILEID,
127 FATTR4_WORD1_MODE
128 | FATTR4_WORD1_NUMLINKS
129 | FATTR4_WORD1_OWNER
130 | FATTR4_WORD1_OWNER_GROUP
131 | FATTR4_WORD1_RAWDEV
132 | FATTR4_WORD1_SPACE_USED
133 | FATTR4_WORD1_TIME_ACCESS
134 | FATTR4_WORD1_TIME_METADATA
135 | FATTR4_WORD1_TIME_MODIFY
136};
137
1549210f
TM		 138static const u32 nfs4_pnfs_open_bitmap[3] = {
139 FATTR4_WORD0_TYPE
140 | FATTR4_WORD0_CHANGE
141 | FATTR4_WORD0_SIZE
142 | FATTR4_WORD0_FSID
143 | FATTR4_WORD0_FILEID,
144 FATTR4_WORD1_MODE
145 | FATTR4_WORD1_NUMLINKS
146 | FATTR4_WORD1_OWNER
147 | FATTR4_WORD1_OWNER_GROUP
148 | FATTR4_WORD1_RAWDEV
149 | FATTR4_WORD1_SPACE_USED
150 | FATTR4_WORD1_TIME_ACCESS
151 | FATTR4_WORD1_TIME_METADATA
152 | FATTR4_WORD1_TIME_MODIFY,
153 FATTR4_WORD2_MDSTHRESHOLD
154};
155
e23008ec
AA		 156static const u32 nfs4_open_noattr_bitmap[3] = {
157 FATTR4_WORD0_TYPE
158 | FATTR4_WORD0_CHANGE
159 | FATTR4_WORD0_FILEID,
160};
161
1da177e4
LT		 162const u32 nfs4_statfs_bitmap[2] = {
163 FATTR4_WORD0_FILES_AVAIL
164 | FATTR4_WORD0_FILES_FREE
165 | FATTR4_WORD0_FILES_TOTAL,
166 FATTR4_WORD1_SPACE_AVAIL
167 | FATTR4_WORD1_SPACE_FREE
168 | FATTR4_WORD1_SPACE_TOTAL
169};
170
4ce79717 171const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 172 FATTR4_WORD0_MAXLINK
173 | FATTR4_WORD0_MAXNAME,
174 0
175};
176
dae100c2 177const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 178 | FATTR4_WORD0_MAXREAD
179 | FATTR4_WORD0_MAXWRITE
180 | FATTR4_WORD0_LEASE_TIME,
55b6e774 181 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 182 | FATTR4_WORD1_FS_LAYOUT_TYPES,
183 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 184};
185
830b8e33
MN		 186const u32 nfs4_fs_locations_bitmap[2] = {
187 FATTR4_WORD0_TYPE
188 | FATTR4_WORD0_CHANGE
189 | FATTR4_WORD0_SIZE
190 | FATTR4_WORD0_FSID
191 | FATTR4_WORD0_FILEID
192 | FATTR4_WORD0_FS_LOCATIONS,
193 FATTR4_WORD1_MODE
194 | FATTR4_WORD1_NUMLINKS
195 | FATTR4_WORD1_OWNER
196 | FATTR4_WORD1_OWNER_GROUP
197 | FATTR4_WORD1_RAWDEV
198 | FATTR4_WORD1_SPACE_USED
199 | FATTR4_WORD1_TIME_ACCESS
200 | FATTR4_WORD1_TIME_METADATA
201 | FATTR4_WORD1_TIME_MODIFY
202 | FATTR4_WORD1_MOUNTED_ON_FILEID
203};
204
bc4785cd 205static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 206 struct nfs4_readdir_arg *readdir)
207{
0dbb4c67 208 __be32 *start, *p;
1da177e4 209
1da177e4 210 if (cookie > 2) {
b7ef1956 211 readdir->cookie = cookie;
1da177e4
LT		 212 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
213 return;
214 }
215
216 readdir->cookie = 0;
217 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
218 if (cookie == 2)
219 return;
220
221 /*
222 * NFSv4 servers do not return entries for '.' and '..'
223 * Therefore, we fake these entries here. We let '.'
224 * have cookie 0 and '..' have cookie 1. Note that
225 * when talking to the server, we always send cookie 0
226 * instead of 1 or 2.
227 */
2b86ce2d 228 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 229
230 if (cookie == 0) {
231 *p++ = xdr_one; /* next */
232 *p++ = xdr_zero; /* cookie, first word */
233 *p++ = xdr_one; /* cookie, second word */
234 *p++ = xdr_one; /* entry len */
235 memcpy(p, ".\0\0\0", 4); /* entry */
236 p++;
237 *p++ = xdr_one; /* bitmap length */
238 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
239 *p++ = htonl(8); /* attribute buffer length */
4e769b93 240 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 241 }
242
243 *p++ = xdr_one; /* next */
244 *p++ = xdr_zero; /* cookie, first word */
245 *p++ = xdr_two; /* cookie, second word */
246 *p++ = xdr_two; /* entry len */
247 memcpy(p, "..\0\0", 4); /* entry */
248 p++;
249 *p++ = xdr_one; /* bitmap length */
250 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
251 *p++ = htonl(8); /* attribute buffer length */
4e769b93 252 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 253
254 readdir->pgbase = (char *)p - (char *)start;
255 readdir->count -= readdir->pgbase;
2b86ce2d 256 kunmap_atomic(start);
1da177e4
LT		 257}
258
65de872e
TM		 259static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
260{
261 int res = 0;
262
263 might_sleep();
264
265 if (*timeout <= 0)
266 *timeout = NFS4_POLL_RETRY_MIN;
267 if (*timeout > NFS4_POLL_RETRY_MAX)
268 *timeout = NFS4_POLL_RETRY_MAX;
d310310c 269 freezable_schedule_timeout_killable(*timeout);
65de872e
TM		 270 if (fatal_signal_pending(current))
271 res = -ERESTARTSYS;
272 *timeout <<= 1;
273 return res;
274}
275
276/* This is the error handling routine for processes that are allowed
277 * to sleep.
278 */
b064eca2 279static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 280{
281 struct nfs_client *clp = server->nfs_client;
9e33bed5 282 struct nfs4_state *state = exception->state;
3114ea7a 283 struct inode *inode = exception->inode;
65de872e
TM		 284 int ret = errorcode;
285
286 exception->retry = 0;
287 switch(errorcode) {
288 case 0:
289 return 0;
3114ea7a 290 case -NFS4ERR_OPENMODE:
011e2a7f 291 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 292 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 293 exception->retry = 1;
294 return 0;
295 }
296 if (state == NULL)
297 break;
298 nfs4_schedule_stateid_recovery(server, state);
299 goto wait_on_recovery;
a1d0b5ee 300 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 301 case -NFS4ERR_ADMIN_REVOKED:
302 case -NFS4ERR_BAD_STATEID:
9e33bed5
TM		 303 if (state == NULL)
304 break;
14977489 305 nfs_remove_bad_delegation(state->inode);
0400a6b0
TM		 306 nfs4_schedule_stateid_recovery(server, state);
307 goto wait_on_recovery;
0ced63d1
TM		 308 case -NFS4ERR_EXPIRED:
309 if (state != NULL)
310 nfs4_schedule_stateid_recovery(server, state);
65de872e 311 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 312 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 313 nfs4_schedule_lease_recovery(clp);
314 goto wait_on_recovery;
03391693 315#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 316 case -NFS4ERR_BADSESSION:
317 case -NFS4ERR_BADSLOT:
318 case -NFS4ERR_BAD_HIGH_SLOT:
319 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
320 case -NFS4ERR_DEADSESSION:
321 case -NFS4ERR_SEQ_FALSE_RETRY:
322 case -NFS4ERR_SEQ_MISORDERED:
323 dprintk("%s ERROR: %d Reset session\n", __func__,
324 errorcode);
9f594791 325 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 326 goto wait_on_recovery;
03391693 327#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 328 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 329 if (exception->timeout > HZ) {
330 /* We have retried a decent amount, time to
331 * fail
332 */
333 ret = -EBUSY;
334 break;
335 }
65de872e
TM		 336 case -NFS4ERR_GRACE:
337 case -NFS4ERR_DELAY:
338 ret = nfs4_delay(server->client, &exception->timeout);
339 if (ret != 0)
340 break;
a8a4ae3a 341 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 342 case -NFS4ERR_OLD_STATEID:
343 exception->retry = 1;
b064eca2
TM		 344 break;
345 case -NFS4ERR_BADOWNER:
346 /* The following works around a Linux server bug! */
347 case -NFS4ERR_BADNAME:
348 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
349 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
350 exception->retry = 1;
351 printk(KERN_WARNING "NFS: v4 server %s "
352 "does not accept raw "
353 "uid/gids. "
354 "Reenabling the idmapper.\n",
355 server->nfs_client->cl_hostname);
356 }
65de872e
TM		 357 }
358 /* We failed to handle the error */
359 return nfs4_map_errors(ret);
0400a6b0 360wait_on_recovery:
a2c0b9e2
TM		 361 ret = nfs4_wait_clnt_recover(clp);
362 if (ret == 0)
363 exception->retry = 1;
364 return ret;
65de872e
TM		 365}
366
367
452e9352 368static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 369{
1da177e4
LT		 370 spin_lock(&clp->cl_lock);
371 if (time_before(clp->cl_last_renewal,timestamp))
372 clp->cl_last_renewal = timestamp;
373 spin_unlock(&clp->cl_lock);
374}
375
452e9352
TM		 376static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
377{
378 do_renew_lease(server->nfs_client, timestamp);
379}
380
cccef3b9
AA		 381#if defined(CONFIG_NFS_V4_1)
382
d185a334 383static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 384{
e3725ec0 385 struct nfs4_session *session;
13615871 386 struct nfs4_slot_table *tbl;
c10e4498 387 bool send_new_highest_used_slotid = false;
13615871 388
dfb4f309 389 if (!res->sr_slot) {
13615871
AA		 390 /* just wake up the next guy waiting since
391 * we may have not consumed a slot after all */
691daf3b 392 dprintk("%s: No slot\n", __func__);
35dc1d74 393 return;
13615871 394 }
e3725ec0
TM		 395 tbl = res->sr_slot->table;
396 session = tbl->session;
ea028ac9 397
35dc1d74 398 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 399 /* Be nice to the server: try to ensure that the last transmitted
400 * value for highest_user_slotid <= target_highest_slotid
401 */
402 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
403 send_new_highest_used_slotid = true;
404
b75ad4cd
TM		 405 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
406 send_new_highest_used_slotid = false;
407 goto out_unlock;
408 }
f4af6e2a 409 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 410
411 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
412 send_new_highest_used_slotid = false;
b75ad4cd 413out_unlock:
35dc1d74 414 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 415 res->sr_slot = NULL;
c10e4498
TM		 416 if (send_new_highest_used_slotid)
417 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 418}
419
14516c3a 420static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 421{
e3725ec0 422 struct nfs4_session *session;
933602e3 423 struct nfs4_slot *slot;
14516c3a 424 struct nfs_client *clp;
ac20d163 425 bool interrupted = false;
85563073 426 int ret = 1;
b0df806c 427
468f8613
BS		 428 /* don't increment the sequence number if the task wasn't sent */
429 if (!RPC_WAS_SENT(task))
b0df806c
AA		 430 goto out;
431
933602e3 432 slot = res->sr_slot;
e3725ec0 433 session = slot->table->session;
933602e3 434
ac20d163
TM		 435 if (slot->interrupted) {
436 slot->interrupted = 0;
437 interrupted = true;
438 }
439
691daf3b 440 /* Check the SEQUENCE operation status */
14516c3a
TM		 441 switch (res->sr_status) {
442 case 0:
b0df806c 443 /* Update the slot's sequence and clientid lease timer */
933602e3 444 ++slot->seq_nr;
e3725ec0 445 clp = session->clp;
8e63b6a8 446 do_renew_lease(clp, res->sr_timestamp);
0629e370 447 /* Check sequence flags */
b4410c2f
TM		 448 if (res->sr_status_flags != 0)
449 nfs4_schedule_lease_recovery(clp);
464ee9f9 450 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 451 break;
ac20d163
TM		 452 case 1:
453 /*
454 * sr_status remains 1 if an RPC level error occurred.
455 * The server may or may not have processed the sequence
456 * operation..
457 * Mark the slot as having hosted an interrupted RPC call.
458 */
459 slot->interrupted = 1;
460 goto out;
14516c3a
TM		 461 case -NFS4ERR_DELAY:
462 /* The server detected a resend of the RPC call and
463 * returned NFS4ERR_DELAY as per Section 2.10.6.2
464 * of RFC5661.
465 */
df2fabff 466 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 467 __func__,
df2fabff 468 slot->slot_nr,
933602e3 469 slot->seq_nr);
14516c3a 470 goto out_retry;
85563073
TM		 471 case -NFS4ERR_BADSLOT:
472 /*
473 * The slot id we used was probably retired. Try again
474 * using a different slot id.
475 */
e8794440
TM		 476 goto retry_nowait;
477 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 478 /*
479 * Was the last operation on this sequence interrupted?
480 * If so, retry after bumping the sequence number.
481 */
482 if (interrupted) {
483 ++slot->seq_nr;
484 goto retry_nowait;
485 }
e8794440
TM		 486 /*
487 * Could this slot have been previously retired?
488 * If so, then the server may be expecting seq_nr = 1!
489 */
8e63b6a8
TM		 490 if (slot->seq_nr != 1) {
491 slot->seq_nr = 1;
492 goto retry_nowait;
493 }
494 break;
e8794440
TM		 495 case -NFS4ERR_SEQ_FALSE_RETRY:
496 ++slot->seq_nr;
497 goto retry_nowait;
14516c3a
TM		 498 default:
499 /* Just update the slot sequence no. */
933602e3 500 ++slot->seq_nr;
b0df806c
AA		 501 }
502out:
503 /* The session may be reset by one of the error handlers. */
504 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 505 nfs41_sequence_free_slot(res);
85563073 506 return ret;
e8794440
TM		 507retry_nowait:
508 if (rpc_restart_call_prepare(task)) {
509 task->tk_status = 0;
510 ret = 0;
511 }
512 goto out;
14516c3a 513out_retry:
d05dd4e9 514 if (!rpc_restart_call(task))
14516c3a
TM		 515 goto out;
516 rpc_delay(task, NFS4_POLL_RETRY_MAX);
517 return 0;
b0df806c
AA		 518}
519
14516c3a
TM		 520static int nfs4_sequence_done(struct rpc_task *task,
521 struct nfs4_sequence_res *res)
df896455 522{
e3725ec0 523 if (res->sr_slot == NULL)
14516c3a
TM		 524 return 1;
525 return nfs41_sequence_done(task, res);
df896455
TM		 526}
527
9d12b216
TM		 528static void nfs41_init_sequence(struct nfs4_sequence_args *args,
529 struct nfs4_sequence_res *res, int cache_reply)
530{
2b2fa717 531 args->sa_slot = NULL;
9d12b216 532 args->sa_cache_this = 0;
8fe72bac 533 args->sa_privileged = 0;
9d12b216
TM		 534 if (cache_reply)
535 args->sa_cache_this = 1;
9d12b216
TM		 536 res->sr_slot = NULL;
537}
538
8fe72bac
TM		 539static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
540{
541 args->sa_privileged = 1;
542}
543
dc70d7b3 544int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 545 struct nfs4_sequence_args *args,
546 struct nfs4_sequence_res *res,
ce5039c1
AA		 547 struct rpc_task *task)
548{
fbcd4abc
AA		 549 struct nfs4_slot *slot;
550 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 551
552 dprintk("--> %s\n", __func__);
ce5039c1 553 /* slot already allocated? */
dfb4f309 554 if (res->sr_slot != NULL)
d9afbd1b 555 goto out_success;
ce5039c1 556
fbcd4abc
AA		 557 tbl = &session->fc_slot_table;
558
69d206b5
TM		 559 task->tk_timeout = 0;
560
fbcd4abc 561 spin_lock(&tbl->slot_tbl_lock);
a2118c33 562 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
8fe72bac 563 !args->sa_privileged) {
0b1c8fc4 564 /* The state manager will wait until the slot table is empty */
0b1c8fc4 565 dprintk("%s session is draining\n", __func__);
7b939a3f 566 goto out_sleep;
689cf5c1
AB		 567 }
568
2dc03b7f 569 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 570 if (IS_ERR(slot)) {
571 /* If out of memory, try again in 1/4 second */
572 if (slot == ERR_PTR(-ENOMEM))
573 task->tk_timeout = HZ >> 2;
fbcd4abc 574 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 575 goto out_sleep;
fbcd4abc
AA		 576 }
577 spin_unlock(&tbl->slot_tbl_lock);
578
2b2fa717 579 args->sa_slot = slot;
fbcd4abc 580
2dc03b7f
TM		 581 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
582 slot->slot_nr, slot->seq_nr);
fbcd4abc 583
dfb4f309 584 res->sr_slot = slot;
8e63b6a8 585 res->sr_timestamp = jiffies;
2a6e26cd 586 res->sr_status_flags = 0;
fbcd4abc
AA		 587 /*
588 * sr_status is only set in decode_sequence, and so will remain
589 * set to 1 if an rpc level failure occurs.
590 */
591 res->sr_status = 1;
d9afbd1b
TM		 592out_success:
593 rpc_call_start(task);
ce5039c1 594 return 0;
7b939a3f 595out_sleep:
8fe72bac
TM		 596 /* Privileged tasks are queued with top priority */
597 if (args->sa_privileged)
1e1093c7
TM		 598 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
599 NULL, RPC_PRIORITY_PRIVILEGED);
600 else
601 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 602 spin_unlock(&tbl->slot_tbl_lock);
603 return -EAGAIN;
ce5039c1 604}
dc70d7b3 605EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 606
035168ab 607int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 608 struct nfs4_sequence_args *args,
609 struct nfs4_sequence_res *res,
ce5039c1
AA		 610 struct rpc_task *task)
611{
035168ab 612 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 613 int ret = 0;
614
d9afbd1b
TM		 615 if (session == NULL) {
616 rpc_call_start(task);
035168ab 617 goto out;
d9afbd1b 618 }
035168ab 619
df2fabff 620 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 621 __func__, session->clp, session, res->sr_slot ?
df2fabff 622 res->sr_slot->slot_nr : -1);
ce5039c1 623
9d12b216 624 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 625out:
626 dprintk("<-- %s status=%d\n", __func__, ret);
627 return ret;
628}
629
630struct nfs41_call_sync_data {
035168ab 631 const struct nfs_server *seq_server;
ce5039c1
AA		 632 struct nfs4_sequence_args *seq_args;
633 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 634};
635
636static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
637{
638 struct nfs41_call_sync_data *data = calldata;
6ba7db34 639 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 640
035168ab
TM		 641 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
642
d9afbd1b 643 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 644}
645
69ab40c4
AA		 646static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
647{
648 struct nfs41_call_sync_data *data = calldata;
649
14516c3a 650 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 651}
652
17280175 653static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 654 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 655 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 656};
657
7c513058
BS		 658static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
659 struct nfs_server *server,
ce5039c1
AA		 660 struct rpc_message *msg,
661 struct nfs4_sequence_args *args,
8fe72bac 662 struct nfs4_sequence_res *res)
ce5039c1
AA		 663{
664 int ret;
665 struct rpc_task *task;
666 struct nfs41_call_sync_data data = {
035168ab 667 .seq_server = server,
ce5039c1
AA		 668 .seq_args = args,
669 .seq_res = res,
ce5039c1
AA		 670 };
671 struct rpc_task_setup task_setup = {
7c513058 672 .rpc_client = clnt,
ce5039c1
AA		 673 .rpc_message = msg,
674 .callback_ops = &nfs41_call_sync_ops,
675 .callback_data = &data
676 };
677
ce5039c1
AA		 678 task = rpc_run_task(&task_setup);
679 if (IS_ERR(task))
680 ret = PTR_ERR(task);
681 else {
682 ret = task->tk_status;
683 rpc_put_task(task);
684 }
685 return ret;
686}
687
df896455 688#else
8fe72bac 689static
9d12b216
TM		 690void nfs41_init_sequence(struct nfs4_sequence_args *args,
691 struct nfs4_sequence_res *res, int cache_reply)
692{
693}
694
8fe72bac
TM		 695static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
696{
697}
698
699
14516c3a
TM		 700static int nfs4_sequence_done(struct rpc_task *task,
701 struct nfs4_sequence_res *res)
df896455 702{
14516c3a 703 return 1;
df896455 704}
cccef3b9
AA		 705#endif /* CONFIG_NFS_V4_1 */
706
fd0c0953 707static
7c513058
BS		 708int _nfs4_call_sync(struct rpc_clnt *clnt,
709 struct nfs_server *server,
cccef3b9
AA		 710 struct rpc_message *msg,
711 struct nfs4_sequence_args *args,
fd0c0953 712 struct nfs4_sequence_res *res)
cccef3b9 713{
7c513058 714 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 715}
716
fd0c0953 717static
7c513058
BS		 718int nfs4_call_sync(struct rpc_clnt *clnt,
719 struct nfs_server *server,
e73b83f2
BS		 720 struct rpc_message *msg,
721 struct nfs4_sequence_args *args,
722 struct nfs4_sequence_res *res,
723 int cache_reply)
724{
fd0c0953 725 nfs41_init_sequence(args, res, cache_reply);
7c513058 726 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
fd0c0953 727 args, res);
e73b83f2 728}
cccef3b9 729
38478b24 730static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 731{
38478b24 732 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 733
38478b24 734 spin_lock(&dir->i_lock);
359d7d1c 735 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 736 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 737 nfs_force_lookup_revalidate(dir);
a9a4a87a 738 dir->i_version = cinfo->after;
de242c0b 739 nfs_fscache_invalidate(dir);
38478b24 740 spin_unlock(&dir->i_lock);
1da177e4
LT		 741}
742
e56e0b78 743struct nfs4_opendata {
c6d00e63 744 struct kref kref;
e56e0b78
TM		 745 struct nfs_openargs o_arg;
746 struct nfs_openres o_res;
cdd4e68b
TM		 747 struct nfs_open_confirmargs c_arg;
748 struct nfs_open_confirmres c_res;
6926afd1
TM		 749 struct nfs4_string owner_name;
750 struct nfs4_string group_name;
e56e0b78 751 struct nfs_fattr f_attr;
e56e0b78 752 struct dentry *dir;
82a2c1b7 753 struct dentry *dentry;
e56e0b78 754 struct nfs4_state_owner *owner;
aac00a8d 755 struct nfs4_state *state;
e56e0b78 756 struct iattr attrs;
26e976a8 757 unsigned long timestamp;
3e309914 758 unsigned int rpc_done : 1;
24ac23ab
TM		 759 int rpc_status;
760 int cancelled;
e56e0b78
TM		 761};
762
2ced46c2
TM		 763
764static void nfs4_init_opendata_res(struct nfs4_opendata *p)
765{
766 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 767 p->o_res.seqid = p->o_arg.seqid;
768 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 769 p->o_res.server = p->o_arg.server;
5f657530 770 p->o_res.access_request = p->o_arg.access;
2ced46c2 771 nfs_fattr_init(&p->f_attr);
6926afd1 772 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 773}
774
82a2c1b7 775static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 776 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 777 const struct iattr *attrs,
778 gfp_t gfp_mask)
e56e0b78 779{
82a2c1b7 780 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 781 struct inode *dir = parent->d_inode;
782 struct nfs_server *server = NFS_SERVER(dir);
783 struct nfs4_opendata *p;
784
8535b2be 785 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 786 if (p == NULL)
787 goto err;
8535b2be 788 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 789 if (p->o_arg.seqid == NULL)
790 goto err_free;
82a2c1b7
AV		 791 nfs_sb_active(dentry->d_sb);
792 p->dentry = dget(dentry);
e56e0b78
TM		 793 p->dir = parent;
794 p->owner = sp;
795 atomic_inc(&sp->so_count);
796 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 797 p->o_arg.open_flags = flags;
798 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 799 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
800 * will return permission denied for all bits until close */
801 if (!(flags & O_EXCL)) {
802 /* ask server to check for all possible rights as results
803 * are cached */
804 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
805 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 806 }
7539bbab 807 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 808 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
809 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 810 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 811 p->o_arg.server = server;
812 p->o_arg.bitmask = server->attr_bitmask;
1549210f 813 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
e56e0b78 814 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
536e43d1 815 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 816 __be32 verf[2];
d77d76ff 817
e56e0b78
TM		 818 p->o_arg.u.attrs = &p->attrs;
819 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 820
821 verf[0] = jiffies;
822 verf[1] = current->pid;
823 memcpy(p->o_arg.u.verifier.data, verf,
824 sizeof(p->o_arg.u.verifier.data));
e56e0b78 825 }
cdd4e68b
TM		 826 p->c_arg.fh = &p->o_res.fh;
827 p->c_arg.stateid = &p->o_res.stateid;
828 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 829 nfs4_init_opendata_res(p);
c6d00e63 830 kref_init(&p->kref);
e56e0b78
TM		 831 return p;
832err_free:
833 kfree(p);
834err:
835 dput(parent);
836 return NULL;
837}
838
c6d00e63 839static void nfs4_opendata_free(struct kref *kref)
e56e0b78 840{
c6d00e63
TM		 841 struct nfs4_opendata *p = container_of(kref,
842 struct nfs4_opendata, kref);
82a2c1b7 843 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 844
845 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 846 if (p->state != NULL)
847 nfs4_put_open_state(p->state);
c6d00e63
TM		 848 nfs4_put_state_owner(p->owner);
849 dput(p->dir);
82a2c1b7
AV		 850 dput(p->dentry);
851 nfs_sb_deactive(sb);
6926afd1 852 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 853 kfree(p);
854}
855
856static void nfs4_opendata_put(struct nfs4_opendata *p)
857{
858 if (p != NULL)
859 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 860}
861
06f814a3
TM		 862static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
863{
06f814a3
TM		 864 int ret;
865
06f814a3 866 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 867 return ret;
868}
869
dc0b027d 870static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 871{
872 int ret = 0;
dc0b027d 873
536e43d1 874 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 875 goto out;
876 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 877 case FMODE_READ:
88069f77
TM		 878 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
879 && state->n_rdonly != 0;
6ee41268
TM		 880 break;
881 case FMODE_WRITE:
88069f77
TM		 882 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
883 && state->n_wronly != 0;
6ee41268
TM		 884 break;
885 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 886 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
887 && state->n_rdwr != 0;
6ee41268 888 }
dc0b027d 889out:
6ee41268
TM		 890 return ret;
891}
892
dc0b027d 893static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 894{
652f89f6
TM		 895 if (delegation == NULL)
896 return 0;
dc0b027d 897 if ((delegation->type & fmode) != fmode)
aac00a8d 898 return 0;
15c831bf 899 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 900 return 0;
d25be546
TM		 901 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
902 return 0;
b7391f44 903 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 904 return 1;
905}
906
dc0b027d 907static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 908{
dc0b027d 909 switch (fmode) {
e7616923
TM		 910 case FMODE_WRITE:
911 state->n_wronly++;
912 break;
913 case FMODE_READ:
914 state->n_rdonly++;
915 break;
916 case FMODE_READ|FMODE_WRITE:
917 state->n_rdwr++;
918 }
dc0b027d 919 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 920}
921
dc0b027d 922static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 923{
924 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 925 nfs4_stateid_copy(&state->stateid, stateid);
926 nfs4_stateid_copy(&state->open_stateid, stateid);
dc0b027d 927 switch (fmode) {
003707c7
TM		 928 case FMODE_READ:
929 set_bit(NFS_O_RDONLY_STATE, &state->flags);
930 break;
931 case FMODE_WRITE:
932 set_bit(NFS_O_WRONLY_STATE, &state->flags);
933 break;
934 case FMODE_READ|FMODE_WRITE:
935 set_bit(NFS_O_RDWR_STATE, &state->flags);
936 }
e7616923
TM		 937}
938
dc0b027d 939static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 940{
8bda4e4c 941 write_seqlock(&state->seqlock);
dc0b027d 942 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 943 write_sequnlock(&state->seqlock);
003707c7
TM		 944}
945
dc0b027d 946static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 947{
8bda4e4c
TM		 948 /*
949 * Protect the call to nfs4_state_set_mode_locked and
950 * serialise the stateid update
951 */
952 write_seqlock(&state->seqlock);
003707c7 953 if (deleg_stateid != NULL) {
f597c537 954 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 955 set_bit(NFS_DELEGATED_STATE, &state->flags);
956 }
957 if (open_stateid != NULL)
dc0b027d 958 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 959 write_sequnlock(&state->seqlock);
960 spin_lock(&state->owner->so_lock);
dc0b027d 961 update_open_stateflags(state, fmode);
ec073428 962 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 963}
964
dc0b027d 965static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 966{
967 struct nfs_inode *nfsi = NFS_I(state->inode);
968 struct nfs_delegation *deleg_cur;
969 int ret = 0;
970
dc0b027d 971 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 972
973 rcu_read_lock();
974 deleg_cur = rcu_dereference(nfsi->delegation);
975 if (deleg_cur == NULL)
976 goto no_delegation;
977
978 spin_lock(&deleg_cur->lock);
979 if (nfsi->delegation != deleg_cur ||
d25be546 980 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 981 (deleg_cur->type & fmode) != fmode)
34310430
TM		 982 goto no_delegation_unlock;
983
984 if (delegation == NULL)
985 delegation = &deleg_cur->stateid;
f597c537 986 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 987 goto no_delegation_unlock;
988
b7391f44 989 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 990 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 991 ret = 1;
992no_delegation_unlock:
993 spin_unlock(&deleg_cur->lock);
994no_delegation:
995 rcu_read_unlock();
996
997 if (!ret && open_stateid != NULL) {
dc0b027d 998 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 999 ret = 1;
1000 }
1001
1002 return ret;
1003}
1004
1005
dc0b027d 1006static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1007{
1008 struct nfs_delegation *delegation;
1009
1010 rcu_read_lock();
1011 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1012 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1013 rcu_read_unlock();
1014 return;
1015 }
1016 rcu_read_unlock();
57ec14c5 1017 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1018}
1019
6ee41268 1020static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1021{
1022 struct nfs4_state *state = opendata->state;
1023 struct nfs_inode *nfsi = NFS_I(state->inode);
1024 struct nfs_delegation *delegation;
536e43d1 1025 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1026 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1027 nfs4_stateid stateid;
1028 int ret = -EAGAIN;
1029
aac00a8d 1030 for (;;) {
dc0b027d 1031 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1032 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1033 if (can_open_cached(state, fmode, open_mode)) {
1034 update_open_stateflags(state, fmode);
6ee41268 1035 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1036 goto out_return_state;
1037 }
1038 spin_unlock(&state->owner->so_lock);
1039 }
34310430
TM		 1040 rcu_read_lock();
1041 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1042 if (!can_open_delegated(delegation, fmode)) {
34310430 1043 rcu_read_unlock();
aac00a8d 1044 break;
34310430 1045 }
aac00a8d 1046 /* Save the delegation */
f597c537 1047 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1048 rcu_read_unlock();
af22f94a 1049 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1050 if (ret != 0)
1051 goto out;
1052 ret = -EAGAIN;
34310430
TM		 1053
1054 /* Try to update the stateid using the delegation */
dc0b027d 1055 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1056 goto out_return_state;
aac00a8d 1057 }
aac00a8d
TM		 1058out:
1059 return ERR_PTR(ret);
1060out_return_state:
1061 atomic_inc(&state->count);
1062 return state;
1063}
1064
e23008ec
AA		 1065static void
1066nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1067{
1068 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1069 struct nfs_delegation *delegation;
1070 int delegation_flags = 0;
1071
1072 rcu_read_lock();
1073 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1074 if (delegation)
1075 delegation_flags = delegation->flags;
1076 rcu_read_unlock();
1077 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1078 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1079 "returning a delegation for "
1080 "OPEN(CLAIM_DELEGATE_CUR)\n",
1081 clp->cl_hostname);
1082 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1083 nfs_inode_set_delegation(state->inode,
1084 data->owner->so_cred,
1085 &data->o_res);
1086 else
1087 nfs_inode_reclaim_delegation(state->inode,
1088 data->owner->so_cred,
1089 &data->o_res);
1090}
1091
1092/*
1093 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1094 * and update the nfs4_state.
1095 */
1096static struct nfs4_state *
1097_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1098{
1099 struct inode *inode = data->state->inode;
1100 struct nfs4_state *state = data->state;
1101 int ret;
1102
1103 if (!data->rpc_done) {
1104 ret = data->rpc_status;
1105 goto err;
1106 }
1107
1108 ret = -ESTALE;
1109 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1110 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1111 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1112 goto err;
1113
1114 ret = -ENOMEM;
1115 state = nfs4_get_open_state(inode, data->owner);
1116 if (state == NULL)
1117 goto err;
1118
1119 ret = nfs_refresh_inode(inode, &data->f_attr);
1120 if (ret)
1121 goto err;
1122
1123 if (data->o_res.delegation_type != 0)
1124 nfs4_opendata_check_deleg(data, state);
1125 update_open_stateid(state, &data->o_res.stateid, NULL,
1126 data->o_arg.fmode);
1127
1128 return state;
1129err:
1130 return ERR_PTR(ret);
1131
1132}
1133
1134static struct nfs4_state *
1135_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1136{
1137 struct inode *inode;
1138 struct nfs4_state *state = NULL;
1b370bc2 1139 int ret;
24ac23ab 1140
aac00a8d 1141 if (!data->rpc_done) {
6ee41268 1142 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1143 goto out;
1144 }
1145
1b370bc2 1146 ret = -EAGAIN;
24ac23ab 1147 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1148 goto err;
24ac23ab 1149 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1150 ret = PTR_ERR(inode);
03f28e3a 1151 if (IS_ERR(inode))
1b370bc2
TM		 1152 goto err;
1153 ret = -ENOMEM;
24ac23ab
TM		 1154 state = nfs4_get_open_state(inode, data->owner);
1155 if (state == NULL)
1b370bc2 1156 goto err_put_inode;
e23008ec
AA		 1157 if (data->o_res.delegation_type != 0)
1158 nfs4_opendata_check_deleg(data, state);
34310430 1159 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1160 data->o_arg.fmode);
24ac23ab 1161 iput(inode);
aac00a8d 1162out:
7aa262b5 1163 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1164 return state;
1b370bc2
TM		 1165err_put_inode:
1166 iput(inode);
1167err:
1168 return ERR_PTR(ret);
24ac23ab
TM		 1169}
1170
e23008ec
AA		 1171static struct nfs4_state *
1172nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1173{
1174 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1175 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1176 return _nfs4_opendata_to_nfs4_state(data);
1177}
1178
864472e9
TM		 1179static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1180{
1181 struct nfs_inode *nfsi = NFS_I(state->inode);
1182 struct nfs_open_context *ctx;
1183
1184 spin_lock(&state->inode->i_lock);
1185 list_for_each_entry(ctx, &nfsi->open_files, list) {
1186 if (ctx->state != state)
1187 continue;
1188 get_nfs_open_context(ctx);
1189 spin_unlock(&state->inode->i_lock);
1190 return ctx;
1191 }
1192 spin_unlock(&state->inode->i_lock);
1193 return ERR_PTR(-ENOENT);
1194}
1195
6f220ed5
TM		 1196static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1197{
1198 struct nfs4_opendata *opendata;
1199
3d4ff43d 1200 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1201 if (opendata == NULL)
1202 return ERR_PTR(-ENOMEM);
1203 opendata->state = state;
1204 atomic_inc(&state->count);
1205 return opendata;
1206}
1207
dc0b027d 1208static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1209{
2ced46c2 1210 struct nfs4_state *newstate;
864472e9
TM		 1211 int ret;
1212
dc0b027d
TM		 1213 opendata->o_arg.open_flags = 0;
1214 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1215 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1216 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1217 nfs4_init_opendata_res(opendata);
b257957e 1218 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1219 if (ret != 0)
1220 return ret;
2ced46c2 1221 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1222 if (IS_ERR(newstate))
1223 return PTR_ERR(newstate);
643168c2 1224 nfs4_close_state(newstate, fmode);
2ced46c2 1225 *res = newstate;
864472e9
TM		 1226 return 0;
1227}
1228
1229static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1230{
864472e9 1231 struct nfs4_state *newstate;
864472e9
TM		 1232 int ret;
1233
1234 /* memory barrier prior to reading state->n_* */
2ced46c2 1235 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1236 smp_rmb();
1237 if (state->n_rdwr != 0) {
b0ed9dbc 1238 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1239 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1240 if (ret != 0)
1241 return ret;
2ced46c2
TM		 1242 if (newstate != state)
1243 return -ESTALE;
864472e9
TM		 1244 }
1245 if (state->n_wronly != 0) {
b0ed9dbc 1246 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1247 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1248 if (ret != 0)
1249 return ret;
2ced46c2
TM		 1250 if (newstate != state)
1251 return -ESTALE;
864472e9
TM		 1252 }
1253 if (state->n_rdonly != 0) {
b0ed9dbc 1254 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1255 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1256 if (ret != 0)
1257 return ret;
2ced46c2
TM		 1258 if (newstate != state)
1259 return -ESTALE;
864472e9 1260 }
1ac7e2fd
TM		 1261 /*
1262 * We may have performed cached opens for all three recoveries.
1263 * Check if we need to update the current stateid.
1264 */
1265 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1266 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1267 write_seqlock(&state->seqlock);
1ac7e2fd 1268 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1269 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1270 write_sequnlock(&state->seqlock);
1ac7e2fd 1271 }
864472e9
TM		 1272 return 0;
1273}
1274
1da177e4
LT		 1275/*
1276 * OPEN_RECLAIM:
1277 * reclaim state on the server after a reboot.
1da177e4 1278 */
539cd03a 1279static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1280{
1ac7e2fd 1281 struct nfs_delegation *delegation;
864472e9 1282 struct nfs4_opendata *opendata;
dc0b027d 1283 fmode_t delegation_type = 0;
1da177e4
LT		 1284 int status;
1285
6f220ed5
TM		 1286 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1287 if (IS_ERR(opendata))
1288 return PTR_ERR(opendata);
864472e9
TM		 1289 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1290 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1291 rcu_read_lock();
1292 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1293 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1294 delegation_type = delegation->type;
1ac7e2fd 1295 rcu_read_unlock();
864472e9
TM		 1296 opendata->o_arg.u.delegation_type = delegation_type;
1297 status = nfs4_open_recover(opendata, state);
c6d00e63 1298 nfs4_opendata_put(opendata);
1da177e4
LT		 1299 return status;
1300}
1301
539cd03a 1302static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1303{
1304 struct nfs_server *server = NFS_SERVER(state->inode);
1305 struct nfs4_exception exception = { };
1306 int err;
1307 do {
539cd03a 1308 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1309 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1310 break;
1311 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1312 } while (exception.retry);
1313 return err;
1314}
1315
864472e9
TM		 1316static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1317{
1318 struct nfs_open_context *ctx;
1319 int ret;
1320
1321 ctx = nfs4_state_find_open_context(state);
1322 if (IS_ERR(ctx))
1323 return PTR_ERR(ctx);
539cd03a 1324 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1325 put_nfs_open_context(ctx);
1326 return ret;
1327}
1328
13437e12 1329static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1330{
e56e0b78 1331 struct nfs4_opendata *opendata;
864472e9 1332 int ret;
1da177e4 1333
6f220ed5
TM		 1334 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1335 if (IS_ERR(opendata))
1336 return PTR_ERR(opendata);
e56e0b78 1337 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
f597c537 1338 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
864472e9 1339 ret = nfs4_open_recover(opendata, state);
c6d00e63 1340 nfs4_opendata_put(opendata);
864472e9 1341 return ret;
1da177e4
LT		 1342}
1343
13437e12 1344int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1345{
1346 struct nfs4_exception exception = { };
539cd03a 1347 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1348 int err;
1349 do {
13437e12 1350 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1351 switch (err) {
1352 case 0:
965b5d67
TM		 1353 case -ENOENT:
1354 case -ESTALE:
1355 goto out;
bcfa49f6
RL		 1356 case -NFS4ERR_BADSESSION:
1357 case -NFS4ERR_BADSLOT:
1358 case -NFS4ERR_BAD_HIGH_SLOT:
1359 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1360 case -NFS4ERR_DEADSESSION:
37380e42 1361 set_bit(NFS_DELEGATED_STATE, &state->flags);
9f594791 1362 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
37380e42 1363 err = -EAGAIN;
bcfa49f6 1364 goto out;
1da177e4
LT		 1365 case -NFS4ERR_STALE_CLIENTID:
1366 case -NFS4ERR_STALE_STATEID:
37380e42 1367 set_bit(NFS_DELEGATED_STATE, &state->flags);
1da177e4
LT		 1368 case -NFS4ERR_EXPIRED:
1369 /* Don't recall a delegation if it was lost */
0400a6b0 1370 nfs4_schedule_lease_recovery(server->nfs_client);
37380e42 1371 err = -EAGAIN;
965b5d67 1372 goto out;
a1d0b5ee 1373 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 1374 case -NFS4ERR_ADMIN_REVOKED:
1375 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 1376 nfs_inode_find_state_and_recover(state->inode,
1377 stateid);
0400a6b0 1378 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 1379 case -ENOMEM:
1380 err = 0;
1381 goto out;
1da177e4 1382 }
37380e42 1383 set_bit(NFS_DELEGATED_STATE, &state->flags);
1da177e4
LT		 1384 err = nfs4_handle_exception(server, err, &exception);
1385 } while (exception.retry);
965b5d67 1386out:
1da177e4
LT		 1387 return err;
1388}
1389
cdd4e68b
TM		 1390static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1391{
1392 struct nfs4_opendata *data = calldata;
1393
1394 data->rpc_status = task->tk_status;
26e976a8 1395 if (data->rpc_status == 0) {
f597c537 1396 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1397 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1398 renew_lease(data->o_res.server, data->timestamp);
3e309914 1399 data->rpc_done = 1;
26e976a8 1400 }
cdd4e68b
TM		 1401}
1402
1403static void nfs4_open_confirm_release(void *calldata)
1404{
1405 struct nfs4_opendata *data = calldata;
1406 struct nfs4_state *state = NULL;
1407
1408 /* If this request hasn't been cancelled, do nothing */
1409 if (data->cancelled == 0)
1410 goto out_free;
1411 /* In case of error, no cleanup! */
3e309914 1412 if (!data->rpc_done)
cdd4e68b 1413 goto out_free;
cdd4e68b 1414 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1415 if (!IS_ERR(state))
643168c2 1416 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1417out_free:
c6d00e63 1418 nfs4_opendata_put(data);
cdd4e68b
TM		 1419}
1420
1421static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1422 .rpc_call_done = nfs4_open_confirm_done,
1423 .rpc_release = nfs4_open_confirm_release,
1424};
1425
1426/*
1427 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1428 */
1429static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1430{
1431 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1432 struct rpc_task *task;
5138fde0
TM		 1433 struct rpc_message msg = {
1434 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1435 .rpc_argp = &data->c_arg,
1436 .rpc_resp = &data->c_res,
1437 .rpc_cred = data->owner->so_cred,
1438 };
c970aa85
TM		 1439 struct rpc_task_setup task_setup_data = {
1440 .rpc_client = server->client,
5138fde0 1441 .rpc_message = &msg,
c970aa85
TM		 1442 .callback_ops = &nfs4_open_confirm_ops,
1443 .callback_data = data,
101070ca 1444 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1445 .flags = RPC_TASK_ASYNC,
1446 };
1da177e4
LT		 1447 int status;
1448
c6d00e63 1449 kref_get(&data->kref);
3e309914
TM		 1450 data->rpc_done = 0;
1451 data->rpc_status = 0;
5138fde0 1452 data->timestamp = jiffies;
c970aa85 1453 task = rpc_run_task(&task_setup_data);
7a1218a2 1454 if (IS_ERR(task))
cdd4e68b 1455 return PTR_ERR(task);
cdd4e68b
TM		 1456 status = nfs4_wait_for_completion_rpc_task(task);
1457 if (status != 0) {
1458 data->cancelled = 1;
1459 smp_wmb();
1460 } else
1461 status = data->rpc_status;
e6b3c4db 1462 rpc_put_task(task);
1da177e4
LT		 1463 return status;
1464}
1465
24ac23ab 1466static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1467{
24ac23ab
TM		 1468 struct nfs4_opendata *data = calldata;
1469 struct nfs4_state_owner *sp = data->owner;
5138fde0 1470
24ac23ab 1471 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1472 goto out_wait;
aac00a8d
TM		 1473 /*
1474 * Check if we still need to send an OPEN call, or if we can use
1475 * a delegation instead.
1476 */
1477 if (data->state != NULL) {
1478 struct nfs_delegation *delegation;
1479
dc0b027d 1480 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1481 goto out_no_action;
aac00a8d
TM		 1482 rcu_read_lock();
1483 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1484 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1485 can_open_delegated(delegation, data->o_arg.fmode))
1486 goto unlock_no_action;
aac00a8d
TM		 1487 rcu_read_unlock();
1488 }
95b72eb0 1489 /* Update client id. */
1f0e890d 1490 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1491 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1492 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
e23008ec 1493 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
6f220ed5
TM		 1494 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1495 }
26e976a8 1496 data->timestamp = jiffies;
035168ab 1497 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1498 &data->o_arg.seq_args,
2240a9e2
TM		 1499 &data->o_res.seq_res,
1500 task) != 0)
1501 nfs_release_seqid(data->o_arg.seqid);
6ee41268 1502 return;
652f89f6
TM		 1503unlock_no_action:
1504 rcu_read_unlock();
6ee41268
TM		 1505out_no_action:
1506 task->tk_action = NULL;
c8da19b9 1507out_wait:
b75ad4cd 1508 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1509}
1510
24ac23ab
TM		 1511static void nfs4_open_done(struct rpc_task *task, void *calldata)
1512{
1513 struct nfs4_opendata *data = calldata;
1da177e4 1514
24ac23ab 1515 data->rpc_status = task->tk_status;
d898528c 1516
14516c3a
TM		 1517 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1518 return;
d898528c 1519
24ac23ab 1520 if (task->tk_status == 0) {
807d66d8
TM		 1521 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1522 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1523 case S_IFREG:
1524 break;
1525 case S_IFLNK:
24ac23ab 1526 data->rpc_status = -ELOOP;
6f926b5b
TM		 1527 break;
1528 case S_IFDIR:
24ac23ab 1529 data->rpc_status = -EISDIR;
6f926b5b
TM		 1530 break;
1531 default:
24ac23ab 1532 data->rpc_status = -ENOTDIR;
807d66d8 1533 }
6f926b5b 1534 }
26e976a8 1535 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1536 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1537 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1538 }
3e309914 1539 data->rpc_done = 1;
24ac23ab 1540}
6f926b5b 1541
24ac23ab
TM		 1542static void nfs4_open_release(void *calldata)
1543{
1544 struct nfs4_opendata *data = calldata;
1545 struct nfs4_state *state = NULL;
1546
1547 /* If this request hasn't been cancelled, do nothing */
1548 if (data->cancelled == 0)
1549 goto out_free;
1550 /* In case of error, no cleanup! */
3e309914 1551 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1552 goto out_free;
1553 /* In case we need an open_confirm, no cleanup! */
1554 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1555 goto out_free;
24ac23ab 1556 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1557 if (!IS_ERR(state))
643168c2 1558 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1559out_free:
c6d00e63 1560 nfs4_opendata_put(data);
24ac23ab
TM		 1561}
1562
1563static const struct rpc_call_ops nfs4_open_ops = {
1564 .rpc_call_prepare = nfs4_open_prepare,
1565 .rpc_call_done = nfs4_open_done,
1566 .rpc_release = nfs4_open_release,
1567};
1568
b257957e 1569static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1570{
1571 struct inode *dir = data->dir->d_inode;
1572 struct nfs_server *server = NFS_SERVER(dir);
1573 struct nfs_openargs *o_arg = &data->o_arg;
1574 struct nfs_openres *o_res = &data->o_res;
1575 struct rpc_task *task;
5138fde0
TM		 1576 struct rpc_message msg = {
1577 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1578 .rpc_argp = o_arg,
1579 .rpc_resp = o_res,
1580 .rpc_cred = data->owner->so_cred,
1581 };
c970aa85
TM		 1582 struct rpc_task_setup task_setup_data = {
1583 .rpc_client = server->client,
5138fde0 1584 .rpc_message = &msg,
c970aa85
TM		 1585 .callback_ops = &nfs4_open_ops,
1586 .callback_data = data,
101070ca 1587 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1588 .flags = RPC_TASK_ASYNC,
1589 };
24ac23ab
TM		 1590 int status;
1591
9d12b216 1592 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1593 kref_get(&data->kref);
3e309914
TM		 1594 data->rpc_done = 0;
1595 data->rpc_status = 0;
2ced46c2 1596 data->cancelled = 0;
b257957e 1597 if (isrecover)
8fe72bac 1598 nfs4_set_sequence_privileged(&o_arg->seq_args);
c970aa85 1599 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1600 if (IS_ERR(task))
1601 return PTR_ERR(task);
1602 status = nfs4_wait_for_completion_rpc_task(task);
1603 if (status != 0) {
1604 data->cancelled = 1;
1605 smp_wmb();
1606 } else
1607 status = data->rpc_status;
1608 rpc_put_task(task);
1609
1610 return status;
1611}
1612
1613static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1614{
1615 struct inode *dir = data->dir->d_inode;
1616 struct nfs_openres *o_res = &data->o_res;
1617 int status;
1618
1619 status = nfs4_run_open_task(data, 1);
1620 if (status != 0 || !data->rpc_done)
1621 return status;
1622
6926afd1
TM		 1623 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1624
b257957e
AB		 1625 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1626 status = _nfs4_proc_open_confirm(data);
1627 if (status != 0)
1628 return status;
1629 }
1630
1631 return status;
1632}
1633
6168f62c
WAA		 1634static int nfs4_opendata_access(struct rpc_cred *cred,
1635 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1636 struct nfs4_state *state, fmode_t fmode,
1637 int openflags)
6168f62c
WAA		 1638{
1639 struct nfs_access_entry cache;
1640 u32 mask;
1641
1642 /* access call failed or for some reason the server doesn't
1643 * support any access modes -- defer access call until later */
1644 if (opendata->o_res.access_supported == 0)
1645 return 0;
1646
1647 mask = 0;
bbd3a8ee 1648 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1649 * write mode bits, but POSIX allows the creating process to write.
1650 * use openflags to check for exec, because fmode won't
1651 * always have FMODE_EXEC set when file open for exec. */
1652 if (openflags & __FMODE_EXEC) {
1653 /* ONLY check for exec rights */
1654 mask = MAY_EXEC;
1655 } else if (fmode & FMODE_READ)
1656 mask = MAY_READ;
6168f62c
WAA		 1657
1658 cache.cred = cred;
1659 cache.jiffies = jiffies;
1660 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1661 nfs_access_add_cache(state->inode, &cache);
1662
bbd3a8ee 1663 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1664 return 0;
1665
1666 /* even though OPEN succeeded, access is denied. Close the file */
1667 nfs4_close_state(state, fmode);
998f40b5 1668 return -EACCES;
6168f62c
WAA		 1669}
1670
b257957e
AB		 1671/*
1672 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1673 */
1674static int _nfs4_proc_open(struct nfs4_opendata *data)
1675{
1676 struct inode *dir = data->dir->d_inode;
1677 struct nfs_server *server = NFS_SERVER(dir);
1678 struct nfs_openargs *o_arg = &data->o_arg;
1679 struct nfs_openres *o_res = &data->o_res;
1680 int status;
1681
1682 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1683 if (!data->rpc_done)
1684 return status;
1685 if (status != 0) {
1686 if (status == -NFS4ERR_BADNAME &&
1687 !(o_arg->open_flags & O_CREAT))
1688 return -ENOENT;
24ac23ab 1689 return status;
08ef7bd3 1690 }
24ac23ab 1691
6926afd1
TM		 1692 nfs_fattr_map_and_free_names(server, &data->f_attr);
1693
90ff0c54 1694 if (o_arg->open_flags & O_CREAT)
56ae19f3 1695 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1696 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1697 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1698 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1699 status = _nfs4_proc_open_confirm(data);
1da177e4 1700 if (status != 0)
24ac23ab 1701 return status;
1da177e4
LT		 1702 }
1703 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1704 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1705 return 0;
1da177e4
LT		 1706}
1707
d83217c1
AA		 1708static int nfs4_recover_expired_lease(struct nfs_server *server)
1709{
1710 return nfs4_client_recover_expired_lease(server->nfs_client);
1711}
1712
1da177e4
LT		 1713/*
1714 * OPEN_EXPIRED:
1715 * reclaim state on the server after a network partition.
1716 * Assumes caller holds the appropriate lock
1717 */
539cd03a 1718static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1719{
e56e0b78 1720 struct nfs4_opendata *opendata;
864472e9 1721 int ret;
1da177e4 1722
6f220ed5
TM		 1723 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1724 if (IS_ERR(opendata))
1725 return PTR_ERR(opendata);
864472e9 1726 ret = nfs4_open_recover(opendata, state);
35d05778 1727 if (ret == -ESTALE)
3d4ff43d 1728 d_drop(ctx->dentry);
c6d00e63 1729 nfs4_opendata_put(opendata);
864472e9 1730 return ret;
1da177e4
LT		 1731}
1732
a9ed2e25 1733static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1734{
539cd03a 1735 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1736 struct nfs4_exception exception = { };
1737 int err;
1738
1739 do {
539cd03a 1740 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1741 switch (err) {
1742 default:
1743 goto out;
1744 case -NFS4ERR_GRACE:
1745 case -NFS4ERR_DELAY:
1746 nfs4_handle_exception(server, err, &exception);
1747 err = 0;
1748 }
202b50dc 1749 } while (exception.retry);
a9ed2e25 1750out:
202b50dc
TM		 1751 return err;
1752}
1753
1da177e4
LT		 1754static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1755{
1da177e4 1756 struct nfs_open_context *ctx;
864472e9 1757 int ret;
1da177e4 1758
864472e9
TM		 1759 ctx = nfs4_state_find_open_context(state);
1760 if (IS_ERR(ctx))
1761 return PTR_ERR(ctx);
539cd03a 1762 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1763 put_nfs_open_context(ctx);
1764 return ret;
1da177e4
LT		 1765}
1766
f062eb6c 1767#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1768static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1769{
f062eb6c 1770 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1771 nfs4_stateid *stateid = &state->stateid;
1772 int status;
1773
1774 /* If a state reset has been done, test_stateid is unneeded */
1775 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1776 return;
1777
1778 status = nfs41_test_stateid(server, stateid);
1779 if (status != NFS_OK) {
1780 /* Free the stateid unless the server explicitly
1781 * informs us the stateid is unrecognized. */
1782 if (status != -NFS4ERR_BAD_STATEID)
1783 nfs41_free_stateid(server, stateid);
6938867e 1784 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1785
6938867e
BS		 1786 write_seqlock(&state->seqlock);
1787 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1788 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1789 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1790 }
1791}
1792
1793/**
1794 * nfs41_check_open_stateid - possibly free an open stateid
1795 *
1796 * @state: NFSv4 state for an inode
1797 *
1798 * Returns NFS_OK if recovery for this stateid is now finished.
1799 * Otherwise a negative NFS4ERR value is returned.
1800 */
1801static int nfs41_check_open_stateid(struct nfs4_state *state)
1802{
1803 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1804 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1805 int status;
1806
1807 /* If a state reset has been done, test_stateid is unneeded */
1808 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1809 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1810 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1811 return -NFS4ERR_BAD_STATEID;
1812
1813 status = nfs41_test_stateid(server, stateid);
1814 if (status != NFS_OK) {
1815 /* Free the stateid unless the server explicitly
1816 * informs us the stateid is unrecognized. */
1817 if (status != -NFS4ERR_BAD_STATEID)
1818 nfs41_free_stateid(server, stateid);
1819
1820 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1821 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1822 clear_bit(NFS_O_RDWR_STATE, &state->flags);
b01dd1d8
BS		 1823 }
1824 return status;
1825}
1826
1827static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1828{
eb64cf96 1829 int status;
b01dd1d8 1830
3e60ffdd
CL		 1831 nfs41_clear_delegation_stateid(state);
1832 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1833 if (status != NFS_OK)
1834 status = nfs4_open_expired(sp, state);
1835 return status;
f062eb6c
BS		 1836}
1837#endif
1838
aa53ed54
JL		 1839/*
1840 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1841 * fields corresponding to attributes that were used to store the verifier.
1842 * Make sure we clobber those fields in the later setattr call
1843 */
1844static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1845{
1846 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1847 !(sattr->ia_valid & ATTR_ATIME_SET))
1848 sattr->ia_valid |= ATTR_ATIME;
1849
1850 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1851 !(sattr->ia_valid & ATTR_MTIME_SET))
1852 sattr->ia_valid |= ATTR_MTIME;
1853}
1854
c21443c2
TM		 1855static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1856 fmode_t fmode,
1857 int flags,
1858 struct nfs4_state **res)
1859{
1860 struct nfs4_state_owner *sp = opendata->owner;
1861 struct nfs_server *server = sp->so_server;
1862 struct nfs4_state *state;
1863 unsigned int seq;
1864 int ret;
1865
1866 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1867
1868 ret = _nfs4_proc_open(opendata);
1869 if (ret != 0)
1870 goto out;
1871
1872 state = nfs4_opendata_to_nfs4_state(opendata);
1873 ret = PTR_ERR(state);
1874 if (IS_ERR(state))
1875 goto out;
1876 if (server->caps & NFS_CAP_POSIX_LOCK)
1877 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1878
1879 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1880 if (ret != 0)
1881 goto out;
1882
1883 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
1884 nfs4_schedule_stateid_recovery(server, state);
1885 nfs4_wait_clnt_recover(server->nfs_client);
1886 }
1887 *res = state;
1888out:
1889 return ret;
1890}
1891
1da177e4 1892/*
24ac23ab 1893 * Returns a referenced nfs4_state
1da177e4 1894 */
82be417a
AA		 1895static int _nfs4_do_open(struct inode *dir,
1896 struct dentry *dentry,
1897 fmode_t fmode,
1898 int flags,
1899 struct iattr *sattr,
1900 struct rpc_cred *cred,
1901 struct nfs4_state **res,
1902 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1903{
1904 struct nfs4_state_owner *sp;
1905 struct nfs4_state *state = NULL;
1906 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1907 struct nfs4_opendata *opendata;
aac00a8d 1908 int status;
1da177e4
LT		 1909
1910 /* Protect against reboot recovery conflicts */
1da177e4 1911 status = -ENOMEM;
d1e284d5
TM		 1912 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1913 if (sp == NULL) {
1da177e4
LT		 1914 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1915 goto out_err;
1916 }
58d9714a
TM		 1917 status = nfs4_recover_expired_lease(server);
1918 if (status != 0)
b4454fe1 1919 goto err_put_state_owner;
82a2c1b7
AV		 1920 if (dentry->d_inode != NULL)
1921 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1922 status = -ENOMEM;
82a2c1b7 1923 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1924 if (opendata == NULL)
95d35cb4 1925 goto err_put_state_owner;
1da177e4 1926
82be417a
AA		 1927 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1928 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1929 if (!opendata->f_attr.mdsthreshold)
1930 goto err_opendata_put;
1549210f 1931 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 1932 }
82a2c1b7
AV		 1933 if (dentry->d_inode != NULL)
1934 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1935
c21443c2 1936 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
6168f62c
WAA		 1937 if (status != 0)
1938 goto err_opendata_put;
1939
0ab64e0e
TM		 1940 if (opendata->o_arg.open_flags & O_EXCL) {
1941 nfs4_exclusive_attrset(opendata, sattr);
1942
1943 nfs_fattr_init(opendata->o_res.f_attr);
1944 status = nfs4_do_setattr(state->inode, cred,
1945 opendata->o_res.f_attr, sattr,
1946 state);
1947 if (status == 0)
1948 nfs_setattr_update_inode(state->inode, sattr);
1949 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1950 }
82be417a
AA		 1951
1952 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1953 *ctx_th = opendata->f_attr.mdsthreshold;
1954 else
1955 kfree(opendata->f_attr.mdsthreshold);
1956 opendata->f_attr.mdsthreshold = NULL;
1957
c6d00e63 1958 nfs4_opendata_put(opendata);
1da177e4 1959 nfs4_put_state_owner(sp);
1da177e4
LT		 1960 *res = state;
1961 return 0;
c6d00e63 1962err_opendata_put:
82be417a 1963 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 1964 nfs4_opendata_put(opendata);
e56e0b78
TM		 1965err_put_state_owner:
1966 nfs4_put_state_owner(sp);
1da177e4 1967out_err:
1da177e4
LT		 1968 *res = NULL;
1969 return status;
1970}
1971
1972
82be417a
AA		 1973static struct nfs4_state *nfs4_do_open(struct inode *dir,
1974 struct dentry *dentry,
1975 fmode_t fmode,
1976 int flags,
1977 struct iattr *sattr,
1978 struct rpc_cred *cred,
1979 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1980{
1981 struct nfs4_exception exception = { };
1982 struct nfs4_state *res;
1983 int status;
1984
6168f62c 1985 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 1986 do {
82be417a
AA		 1987 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1988 &res, ctx_th);
1da177e4
LT		 1989 if (status == 0)
1990 break;
1991 /* NOTE: BAD_SEQID means the server and client disagree about the
1992 * book-keeping w.r.t. state-changing operations
1993 * (OPEN/CLOSE/LOCK/LOCKU...)
1994 * It is actually a sign of a bug on the client or on the server.
1995 *
1996 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1997 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1998 * have unhashed the old state_owner for us, and that we can
1999 * therefore safely retry using a new one. We should still warn
2000 * the user though...
2001 */
2002 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2003 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2004 " returned a bad sequence-id error!\n",
2005 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2006 exception.retry = 1;
2007 continue;
2008 }
550f5747
TM		 2009 /*
2010 * BAD_STATEID on OPEN means that the server cancelled our
2011 * state before it received the OPEN_CONFIRM.
2012 * Recover by retrying the request as per the discussion
2013 * on Page 181 of RFC3530.
2014 */
2015 if (status == -NFS4ERR_BAD_STATEID) {
2016 exception.retry = 1;
2017 continue;
2018 }
aac00a8d
TM		 2019 if (status == -EAGAIN) {
2020 /* We must have found a delegation */
2021 exception.retry = 1;
2022 continue;
2023 }
1da177e4
LT		 2024 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
2025 status, &exception));
2026 } while (exception.retry);
2027 return res;
2028}
2029
659bfcd6
TM		 2030static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2031 struct nfs_fattr *fattr, struct iattr *sattr,
2032 struct nfs4_state *state)
1da177e4 2033{
3e4f6290 2034 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2035 struct nfs_setattrargs arg = {
3e4f6290 2036 .fh = NFS_FH(inode),
1da177e4
LT		 2037 .iap = sattr,
2038 .server = server,
2039 .bitmask = server->attr_bitmask,
2040 };
2041 struct nfs_setattrres res = {
2042 .fattr = fattr,
2043 .server = server,
2044 };
2045 struct rpc_message msg = {
659bfcd6
TM		 2046 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2047 .rpc_argp = &arg,
2048 .rpc_resp = &res,
2049 .rpc_cred = cred,
1da177e4 2050 };
26e976a8 2051 unsigned long timestamp = jiffies;
65e4308d 2052 int status;
1da177e4 2053
0e574af1 2054 nfs_fattr_init(fattr);
1da177e4 2055
4fc8796d 2056 if (state != NULL) {
2a369153
TM		 2057 struct nfs_lockowner lockowner = {
2058 .l_owner = current->files,
2059 .l_pid = current->tgid,
2060 };
4fc8796d 2061 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2062 &lockowner);
4fc8796d
TM		 2063 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2064 FMODE_WRITE)) {
3e4f6290 2065 /* Use that stateid */
08e9eac4 2066 } else
f597c537 2067 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2068
7c513058 2069 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2070 if (status == 0 && state != NULL)
2071 renew_lease(server, timestamp);
65e4308d 2072 return status;
1da177e4
LT		 2073}
2074
659bfcd6
TM		 2075static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2076 struct nfs_fattr *fattr, struct iattr *sattr,
2077 struct nfs4_state *state)
1da177e4 2078{
3e4f6290 2079 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2080 struct nfs4_exception exception = {
2081 .state = state,
3114ea7a 2082 .inode = inode,
a1d0b5ee 2083 };
1da177e4
LT		 2084 int err;
2085 do {
451146be
TM		 2086 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2087 switch (err) {
2088 case -NFS4ERR_OPENMODE:
2089 if (state && !(state->state & FMODE_WRITE)) {
2090 err = -EBADF;
2091 if (sattr->ia_valid & ATTR_OPEN)
2092 err = -EACCES;
2093 goto out;
2094 }
2095 }
2096 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2097 } while (exception.retry);
451146be 2098out:
1da177e4
LT		 2099 return err;
2100}
2101
2102struct nfs4_closedata {
2103 struct inode *inode;
2104 struct nfs4_state *state;
2105 struct nfs_closeargs arg;
2106 struct nfs_closeres res;
516a6af6 2107 struct nfs_fattr fattr;
26e976a8 2108 unsigned long timestamp;
f7e8917a
FI		 2109 bool roc;
2110 u32 roc_barrier;
1da177e4
LT		 2111};
2112
963d8fe5 2113static void nfs4_free_closedata(void *data)
9512135d 2114{
963d8fe5
TM		 2115 struct nfs4_closedata *calldata = data;
2116 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2117 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2118
f7e8917a
FI		 2119 if (calldata->roc)
2120 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2121 nfs4_put_open_state(calldata->state);
2122 nfs_free_seqid(calldata->arg.seqid);
9512135d 2123 nfs4_put_state_owner(sp);
322b2b90 2124 nfs_sb_deactive(sb);
9512135d
TM		 2125 kfree(calldata);
2126}
2127
88069f77
TM		 2128static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2129 fmode_t fmode)
2130{
2131 spin_lock(&state->owner->so_lock);
2132 if (!(fmode & FMODE_READ))
2133 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2134 if (!(fmode & FMODE_WRITE))
2135 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2136 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2137 spin_unlock(&state->owner->so_lock);
2138}
2139
963d8fe5 2140static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2141{
963d8fe5 2142 struct nfs4_closedata *calldata = data;
1da177e4 2143 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2144 struct nfs_server *server = NFS_SERVER(calldata->inode);
2145
a3ca5651 2146 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2147 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2148 return;
1da177e4
LT		 2149 /* hmm. we are done with the inode, and in the process of freeing
2150 * the state_owner. we keep this around to process errors
2151 */
1da177e4
LT		 2152 switch (task->tk_status) {
2153 case 0:
f7e8917a
FI		 2154 if (calldata->roc)
2155 pnfs_roc_set_barrier(state->inode,
2156 calldata->roc_barrier);
45328c35 2157 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2158 renew_lease(server, calldata->timestamp);
88069f77
TM		 2159 nfs4_close_clear_stateid_flags(state,
2160 calldata->arg.fmode);
1da177e4
LT		 2161 break;
2162 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2163 case -NFS4ERR_OLD_STATEID:
2164 case -NFS4ERR_BAD_STATEID:
1da177e4 2165 case -NFS4ERR_EXPIRED:
dc0b027d 2166 if (calldata->arg.fmode == 0)
9e33bed5 2167 break;
1da177e4 2168 default:
72211dbe
TM		 2169 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2170 rpc_restart_call_prepare(task);
1da177e4 2171 }
72211dbe 2172 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2173 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2174 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2175}
2176
4ce70ada 2177static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2178{
4ce70ada 2179 struct nfs4_closedata *calldata = data;
9512135d 2180 struct nfs4_state *state = calldata->state;
7fdab069 2181 struct inode *inode = calldata->inode;
88069f77 2182 int call_close = 0;
9512135d 2183
a3ca5651 2184 dprintk("%s: begin!\n", __func__);
963d8fe5 2185 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2186 goto out_wait;
003707c7 2187
88069f77
TM		 2188 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2189 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2190 spin_lock(&state->owner->so_lock);
003707c7 2191 /* Calculate the change in open mode */
e7616923 2192 if (state->n_rdwr == 0) {
003707c7 2193 if (state->n_rdonly == 0) {
88069f77
TM		 2194 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2195 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2196 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2197 }
2198 if (state->n_wronly == 0) {
88069f77
TM		 2199 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2200 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2201 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2202 }
e7616923 2203 }
4cecb76f 2204 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2205
2206 if (!call_close) {
963d8fe5 2207 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2208 goto out_no_action;
9512135d 2209 }
88069f77 2210
f7e8917a 2211 if (calldata->arg.fmode == 0) {
88069f77 2212 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2213 if (calldata->roc &&
7fdab069 2214 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
c8da19b9 2215 goto out_wait;
f7e8917a 2216 }
88069f77 2217
516a6af6 2218 nfs_fattr_init(calldata->res.fattr);
26e976a8 2219 calldata->timestamp = jiffies;
7fdab069 2220 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2221 &calldata->arg.seq_args,
2222 &calldata->res.seq_res,
2240a9e2
TM		 2223 task) != 0)
2224 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2225 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2226 return;
2227out_no_action:
2228 task->tk_action = NULL;
2229out_wait:
2230 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2231}
2232
963d8fe5 2233static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2234 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2235 .rpc_call_done = nfs4_close_done,
2236 .rpc_release = nfs4_free_closedata,
2237};
2238
1da177e4
LT		 2239/*
2240 * It is possible for data to be read/written from a mem-mapped file
2241 * after the sys_close call (which hits the vfs layer as a flush).
2242 * This means that we can't safely call nfsv4 close on a file until
2243 * the inode is cleared. This in turn means that we are not good
2244 * NFSv4 citizens - we do not indicate to the server to update the file's
2245 * share state even when we are done with one of the three share
2246 * stateid's in the inode.
2247 *
2248 * NOTE: Caller must be holding the sp->so_owner semaphore!
2249 */
1f7977c1 2250int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2251{
4a35bd41 2252 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2253 struct nfs4_closedata *calldata;
b39e625b
TM		 2254 struct nfs4_state_owner *sp = state->owner;
2255 struct rpc_task *task;
5138fde0
TM		 2256 struct rpc_message msg = {
2257 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2258 .rpc_cred = state->owner->so_cred,
2259 };
c970aa85
TM		 2260 struct rpc_task_setup task_setup_data = {
2261 .rpc_client = server->client,
5138fde0 2262 .rpc_message = &msg,
c970aa85 2263 .callback_ops = &nfs4_close_ops,
101070ca 2264 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2265 .flags = RPC_TASK_ASYNC,
2266 };
9512135d 2267 int status = -ENOMEM;
1da177e4 2268
8535b2be 2269 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2270 if (calldata == NULL)
9512135d 2271 goto out;
9d12b216 2272 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2273 calldata->inode = state->inode;
1da177e4 2274 calldata->state = state;
4a35bd41 2275 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2276 calldata->arg.stateid = &state->open_stateid;
1da177e4 2277 /* Serialization for the sequence id */
8535b2be 2278 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2279 if (calldata->arg.seqid == NULL)
2280 goto out_free_calldata;
dc0b027d 2281 calldata->arg.fmode = 0;
a65318bf 2282 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2283 calldata->res.fattr = &calldata->fattr;
c1d51931 2284 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2285 calldata->res.server = server;
1f7977c1 2286 calldata->roc = pnfs_roc(state->inode);
643168c2 2287 nfs_sb_active(calldata->inode->i_sb);
9512135d 2288
1174dd1f
TM		 2289 msg.rpc_argp = &calldata->arg;
2290 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2291 task_setup_data.callback_data = calldata;
2292 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2293 if (IS_ERR(task))
2294 return PTR_ERR(task);
a49c3c77
TM		 2295 status = 0;
2296 if (wait)
2297 status = rpc_wait_for_completion_task(task);
b39e625b 2298 rpc_put_task(task);
a49c3c77 2299 return status;
9512135d
TM		 2300out_free_calldata:
2301 kfree(calldata);
2302out:
b39e625b
TM		 2303 nfs4_put_open_state(state);
2304 nfs4_put_state_owner(sp);
9512135d 2305 return status;
1da177e4
LT		 2306}
2307
2b484297 2308static struct inode *
cd9a1c0e 2309nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2310{
1da177e4 2311 struct nfs4_state *state;
1da177e4 2312
565277f6 2313 /* Protect against concurrent sillydeletes */
82be417a
AA		 2314 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2315 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2316 if (IS_ERR(state))
2317 return ERR_CAST(state);
cd9a1c0e 2318 ctx->state = state;
f46e0bd3 2319 return igrab(state->inode);
1da177e4
LT		 2320}
2321
1185a552 2322static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2323{
2324 if (ctx->state == NULL)
2325 return;
2326 if (is_sync)
643168c2 2327 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2328 else
643168c2 2329 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2330}
1da177e4
LT		 2331
2332static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2333{
43652ad5
BH		 2334 struct nfs4_server_caps_arg args = {
2335 .fhandle = fhandle,
2336 };
1da177e4
LT		 2337 struct nfs4_server_caps_res res = {};
2338 struct rpc_message msg = {
2339 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2340 .rpc_argp = &args,
1da177e4
LT		 2341 .rpc_resp = &res,
2342 };
2343 int status;
2344
7c513058 2345 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2346 if (status == 0) {
2347 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2348 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2349 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2350 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2351 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2352 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2353 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2354 server->caps |= NFS_CAP_ACLS;
2355 if (res.has_links != 0)
2356 server->caps |= NFS_CAP_HARDLINKS;
2357 if (res.has_symlinks != 0)
2358 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2359 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2360 server->caps |= NFS_CAP_FILEID;
2361 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2362 server->caps |= NFS_CAP_MODE;
2363 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2364 server->caps |= NFS_CAP_NLINK;
2365 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2366 server->caps |= NFS_CAP_OWNER;
2367 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2368 server->caps |= NFS_CAP_OWNER_GROUP;
2369 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2370 server->caps |= NFS_CAP_ATIME;
2371 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2372 server->caps |= NFS_CAP_CTIME;
2373 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2374 server->caps |= NFS_CAP_MTIME;
2375
a65318bf
TM		 2376 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2377 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2378 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2379 server->acl_bitmask = res.acl_bitmask;
264e6351 2380 server->fh_expire_type = res.fh_expire_type;
1da177e4 2381 }
cccef3b9 2382
1da177e4
LT		 2383 return status;
2384}
2385
55a97593 2386int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2387{
2388 struct nfs4_exception exception = { };
2389 int err;
2390 do {
2391 err = nfs4_handle_exception(server,
2392 _nfs4_server_capabilities(server, fhandle),
2393 &exception);
2394 } while (exception.retry);
2395 return err;
2396}
2397
2398static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2399 struct nfs_fsinfo *info)
2400{
1da177e4
LT		 2401 struct nfs4_lookup_root_arg args = {
2402 .bitmask = nfs4_fattr_bitmap,
2403 };
2404 struct nfs4_lookup_res res = {
2405 .server = server,
0e574af1 2406 .fattr = info->fattr,
1da177e4
LT		 2407 .fh = fhandle,
2408 };
2409 struct rpc_message msg = {
2410 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2411 .rpc_argp = &args,
2412 .rpc_resp = &res,
2413 };
008f55d0 2414
0e574af1 2415 nfs_fattr_init(info->fattr);
7c513058 2416 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2417}
2418
2419static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2420 struct nfs_fsinfo *info)
2421{
2422 struct nfs4_exception exception = { };
2423 int err;
2424 do {
fb8a5ba8
BS		 2425 err = _nfs4_lookup_root(server, fhandle, info);
2426 switch (err) {
2427 case 0:
2428 case -NFS4ERR_WRONGSEC:
05e9cfb4 2429 goto out;
fb8a5ba8
BS		 2430 default:
2431 err = nfs4_handle_exception(server, err, &exception);
2432 }
1da177e4 2433 } while (exception.retry);
05e9cfb4 2434out:
1da177e4
LT		 2435 return err;
2436}
2437
8f70e95f
BS		 2438static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2439 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2440{
2441 struct rpc_auth *auth;
2442 int ret;
2443
2444 auth = rpcauth_create(flavor, server->client);
e8d920c5 2445 if (IS_ERR(auth)) {
8f70e95f
BS		 2446 ret = -EIO;
2447 goto out;
2448 }
2449 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2450out:
2451 return ret;
2452}
2453
801a16dc 2454static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2455 struct nfs_fsinfo *info)
1da177e4 2456{
8f70e95f 2457 int i, len, status = 0;
0fabee24 2458 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2459
6a1a1e34 2460 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
4ea8fed5
TM		 2461 if (len < 0)
2462 return len;
8f70e95f
BS		 2463
2464 for (i = 0; i < len; i++) {
6a1a1e34
CL		 2465 /* AUTH_UNIX is the default flavor if none was specified,
2466 * thus has already been tried. */
2467 if (flav_array[i] == RPC_AUTH_UNIX)
2468 continue;
2469
8f70e95f 2470 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2471 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2472 continue;
2473 break;
8f70e95f 2474 }
fb8a5ba8
BS		 2475 /*
2476 * -EACCESS could mean that the user doesn't have correct permissions
2477 * to access the mount. It could also mean that we tried to mount
2478 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2479 * existing mount programs don't handle -EACCES very well so it should
2480 * be mapped to -EPERM instead.
2481 */
2482 if (status == -EACCES)
2483 status = -EPERM;
801a16dc
BS		 2484 return status;
2485}
2486
2487/*
2488 * get the file handle for the "/" directory on the server
2489 */
3028eb2b
BS		 2490int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2491 struct nfs_fsinfo *info)
801a16dc 2492{
fca78d6d 2493 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2494 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2495 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2496 /*
2497 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2498 * by nfs4_map_errors() as this function exits.
2499 */
fca78d6d 2500 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2501 if (status == 0)
2502 status = nfs4_server_capabilities(server, fhandle);
2503 if (status == 0)
2504 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2505 return nfs4_map_errors(status);
1da177e4
LT		 2506}
2507
bae36241
BS		 2508static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2509 struct nfs_fsinfo *info)
2510{
2511 int error;
2512 struct nfs_fattr *fattr = info->fattr;
2513
2514 error = nfs4_server_capabilities(server, mntfh);
2515 if (error < 0) {
2516 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2517 return error;
2518 }
2519
2520 error = nfs4_proc_getattr(server, mntfh, fattr);
2521 if (error < 0) {
2522 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2523 return error;
2524 }
2525
2526 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2527 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2528 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2529
2530 return error;
2531}
2532
6b97fd3d
MN		 2533/*
2534 * Get locations and (maybe) other attributes of a referral.
2535 * Note that we'll actually follow the referral later when
2536 * we detect fsid mismatch in inode revalidation
2537 */
f05d147f
BS		 2538static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2539 const struct qstr *name, struct nfs_fattr *fattr,
2540 struct nfs_fh *fhandle)
6b97fd3d
MN		 2541{
2542 int status = -ENOMEM;
2543 struct page *page = NULL;
2544 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2545
2546 page = alloc_page(GFP_KERNEL);
2547 if (page == NULL)
2548 goto out;
2549 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2550 if (locations == NULL)
2551 goto out;
2552
f05d147f 2553 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2554 if (status != 0)
2555 goto out;
2556 /* Make sure server returned a different fsid for the referral */
2557 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2558 dprintk("%s: server did not return a different fsid for"
2559 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2560 status = -EIO;
2561 goto out;
2562 }
533eb461
AA		 2563 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2564 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2565
533eb461 2566 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2567 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2568 memset(fhandle, 0, sizeof(struct nfs_fh));
2569out:
2570 if (page)
2571 __free_page(page);
5d7ca35a 2572 kfree(locations);
6b97fd3d
MN		 2573 return status;
2574}
2575
1da177e4
LT		 2576static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2577{
2578 struct nfs4_getattr_arg args = {
2579 .fh = fhandle,
2580 .bitmask = server->attr_bitmask,
2581 };
2582 struct nfs4_getattr_res res = {
2583 .fattr = fattr,
2584 .server = server,
2585 };
2586 struct rpc_message msg = {
2587 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2588 .rpc_argp = &args,
2589 .rpc_resp = &res,
2590 };
2591
0e574af1 2592 nfs_fattr_init(fattr);
7c513058 2593 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2594}
2595
2596static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2597{
2598 struct nfs4_exception exception = { };
2599 int err;
2600 do {
2601 err = nfs4_handle_exception(server,
2602 _nfs4_proc_getattr(server, fhandle, fattr),
2603 &exception);
2604 } while (exception.retry);
2605 return err;
2606}
2607
2608/*
2609 * The file is not closed if it is opened due to the a request to change
2610 * the size of the file. The open call will not be needed once the
2611 * VFS layer lookup-intents are implemented.
2612 *
2613 * Close is called when the inode is destroyed.
2614 * If we haven't opened the file for O_WRONLY, we
2615 * need to in the size_change case to obtain a stateid.
2616 *
2617 * Got race?
2618 * Because OPEN is always done by name in nfsv4, it is
2619 * possible that we opened a different file by the same
2620 * name. We can recognize this race condition, but we
2621 * can't do anything about it besides returning an error.
2622 *
2623 * This will be fixed with VFS changes (lookup-intent).
2624 */
2625static int
2626nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2627 struct iattr *sattr)
2628{
08e9eac4 2629 struct inode *inode = dentry->d_inode;
659bfcd6 2630 struct rpc_cred *cred = NULL;
d530838b 2631 struct nfs4_state *state = NULL;
1da177e4
LT		 2632 int status;
2633
8a1636c4
BH		 2634 if (pnfs_ld_layoutret_on_setattr(inode))
2635 pnfs_return_layout(inode);
2636
0e574af1 2637 nfs_fattr_init(fattr);
1da177e4 2638
2669940d
AA		 2639 /* Deal with open(O_TRUNC) */
2640 if (sattr->ia_valid & ATTR_OPEN)
2641 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2642
2643 /* Optimization: if the end result is no change, don't RPC */
2644 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2645 return 0;
2646
d530838b 2647 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2648 if (sattr->ia_valid & ATTR_FILE) {
2649 struct nfs_open_context *ctx;
2650
2651 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2652 if (ctx) {
2653 cred = ctx->cred;
2654 state = ctx->state;
2655 }
659bfcd6 2656 }
08e9eac4 2657
659bfcd6 2658 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2659 if (status == 0)
2660 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2661 return status;
2662}
2663
0c2e53f1
TM		 2664static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2665 const struct qstr *name, struct nfs_fh *fhandle,
2666 struct nfs_fattr *fattr)
2b3de441 2667{
0c2e53f1 2668 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2669 int status;
2670 struct nfs4_lookup_arg args = {
2671 .bitmask = server->attr_bitmask,
0c2e53f1 2672 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2673 .name = name,
2674 };
2675 struct nfs4_lookup_res res = {
2676 .server = server,
2677 .fattr = fattr,
2678 .fh = fhandle,
2679 };
2680 struct rpc_message msg = {
2681 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2682 .rpc_argp = &args,
2683 .rpc_resp = &res,
2684 };
2685
2686 nfs_fattr_init(fattr);
2687
1da177e4 2688 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2689 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2690 dprintk("NFS reply lookup: %d\n", status);
2691 return status;
2692}
2693
72de53ec 2694static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2695{
7ebb9315 2696 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2697 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2698 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2699 fattr->nlink = 2;
2700}
2701
72de53ec
BS		 2702static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2703 struct qstr *name, struct nfs_fh *fhandle,
2704 struct nfs_fattr *fattr)
1da177e4
LT		 2705{
2706 struct nfs4_exception exception = { };
72de53ec 2707 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2708 int err;
2709 do {
72de53ec
BS		 2710 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2711 switch (err) {
08ef7bd3 2712 case -NFS4ERR_BADNAME:
72de53ec
BS		 2713 err = -ENOENT;
2714 goto out;
0c2e53f1 2715 case -NFS4ERR_MOVED:
f05d147f 2716 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2717 goto out;
0c2e53f1 2718 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2719 err = -EPERM;
2720 if (client != *clnt)
2721 goto out;
2722
2723 client = nfs4_create_sec_client(client, dir, name);
2724 if (IS_ERR(client))
2725 return PTR_ERR(client);
2726
2727 exception.retry = 1;
2728 break;
2729 default:
2730 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2731 }
1da177e4 2732 } while (exception.retry);
72de53ec
BS		 2733
2734out:
2735 if (err == 0)
2736 *clnt = client;
2737 else if (client != *clnt)
2738 rpc_shutdown_client(client);
2739
1da177e4
LT		 2740 return err;
2741}
2742
80a16b21 2743static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2744 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2745{
2746 int status;
2747 struct rpc_clnt *client = NFS_CLIENT(dir);
2748
2749 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2750 if (client != NFS_CLIENT(dir)) {
2751 rpc_shutdown_client(client);
2752 nfs_fixup_secinfo_attributes(fattr);
2753 }
2754 return status;
2755}
2756
f05d147f
BS		 2757struct rpc_clnt *
2758nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2759 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2760{
2761 int status;
2762 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2763
2764 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2765 if (status < 0) {
2766 rpc_shutdown_client(client);
2767 return ERR_PTR(status);
2768 }
2769 return client;
2770}
2771
1da177e4
LT		 2772static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2773{
76b32999 2774 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2775 struct nfs4_accessargs args = {
2776 .fh = NFS_FH(inode),
a4980e78 2777 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2778 };
2779 struct nfs4_accessres res = {
2780 .server = server,
1da177e4 2781 };
1da177e4
LT		 2782 struct rpc_message msg = {
2783 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2784 .rpc_argp = &args,
2785 .rpc_resp = &res,
2786 .rpc_cred = entry->cred,
2787 };
2788 int mode = entry->mask;
2789 int status;
2790
2791 /*
2792 * Determine which access bits we want to ask for...
2793 */
2794 if (mode & MAY_READ)
2795 args.access |= NFS4_ACCESS_READ;
2796 if (S_ISDIR(inode->i_mode)) {
2797 if (mode & MAY_WRITE)
2798 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2799 if (mode & MAY_EXEC)
2800 args.access |= NFS4_ACCESS_LOOKUP;
2801 } else {
2802 if (mode & MAY_WRITE)
2803 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2804 if (mode & MAY_EXEC)
2805 args.access |= NFS4_ACCESS_EXECUTE;
2806 }
c407d41a
TM		 2807
2808 res.fattr = nfs_alloc_fattr();
2809 if (res.fattr == NULL)
2810 return -ENOMEM;
2811
7c513058 2812 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2813 if (!status) {
6168f62c 2814 nfs_access_set_mask(entry, res.access);
c407d41a 2815 nfs_refresh_inode(inode, res.fattr);
1da177e4 2816 }
c407d41a 2817 nfs_free_fattr(res.fattr);
1da177e4
LT		 2818 return status;
2819}
2820
2821static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2822{
2823 struct nfs4_exception exception = { };
2824 int err;
2825 do {
2826 err = nfs4_handle_exception(NFS_SERVER(inode),
2827 _nfs4_proc_access(inode, entry),
2828 &exception);
2829 } while (exception.retry);
2830 return err;
2831}
2832
2833/*
2834 * TODO: For the time being, we don't try to get any attributes
2835 * along with any of the zero-copy operations READ, READDIR,
2836 * READLINK, WRITE.
2837 *
2838 * In the case of the first three, we want to put the GETATTR
2839 * after the read-type operation -- this is because it is hard
2840 * to predict the length of a GETATTR response in v4, and thus
2841 * align the READ data correctly. This means that the GETATTR
2842 * may end up partially falling into the page cache, and we should
2843 * shift it into the 'tail' of the xdr_buf before processing.
2844 * To do this efficiently, we need to know the total length
2845 * of data received, which doesn't seem to be available outside
2846 * of the RPC layer.
2847 *
2848 * In the case of WRITE, we also want to put the GETATTR after
2849 * the operation -- in this case because we want to make sure
140150db 2850 * we get the post-operation mtime and size.
1da177e4
LT		 2851 *
2852 * Both of these changes to the XDR layer would in fact be quite
2853 * minor, but I decided to leave them for a subsequent patch.
2854 */
2855static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2856 unsigned int pgbase, unsigned int pglen)
2857{
2858 struct nfs4_readlink args = {
2859 .fh = NFS_FH(inode),
2860 .pgbase = pgbase,
2861 .pglen = pglen,
2862 .pages = &page,
2863 };
f50c7000 2864 struct nfs4_readlink_res res;
1da177e4
LT		 2865 struct rpc_message msg = {
2866 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2867 .rpc_argp = &args,
f50c7000 2868 .rpc_resp = &res,
1da177e4
LT		 2869 };
2870
7c513058 2871 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2872}
2873
2874static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2875 unsigned int pgbase, unsigned int pglen)
2876{
2877 struct nfs4_exception exception = { };
2878 int err;
2879 do {
2880 err = nfs4_handle_exception(NFS_SERVER(inode),
2881 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2882 &exception);
2883 } while (exception.retry);
2884 return err;
2885}
2886
1da177e4 2887/*
8867fe58 2888 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2889 */
1da177e4
LT		 2890static int
2891nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2892 int flags)
1da177e4 2893{
8867fe58 2894 struct nfs_open_context *ctx;
1da177e4 2895 struct nfs4_state *state;
1da177e4
LT		 2896 int status = 0;
2897
8867fe58
MS		 2898 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2899 if (IS_ERR(ctx))
2900 return PTR_ERR(ctx);
2901
a8a5da99 2902 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 2903 state = nfs4_do_open(dir, dentry, ctx->mode,
2904 flags, sattr, ctx->cred,
2905 &ctx->mdsthreshold);
d4d9cdcb 2906 d_drop(dentry);
1da177e4
LT		 2907 if (IS_ERR(state)) {
2908 status = PTR_ERR(state);
c0204fd2 2909 goto out;
1da177e4 2910 }
d4d9cdcb 2911 d_add(dentry, igrab(state->inode));
d75340cc 2912 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 2913 ctx->state = state;
1da177e4 2914out:
8867fe58 2915 put_nfs_open_context(ctx);
1da177e4
LT		 2916 return status;
2917}
2918
2919static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2920{
16e42959 2921 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2922 struct nfs_removeargs args = {
1da177e4 2923 .fh = NFS_FH(dir),
26fe5750 2924 .name = *name,
16e42959 2925 };
4fdc17b2 2926 struct nfs_removeres res = {
16e42959 2927 .server = server,
1da177e4 2928 };
1da177e4 2929 struct rpc_message msg = {
4fdc17b2
TM		 2930 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2931 .rpc_argp = &args,
2932 .rpc_resp = &res,
1da177e4 2933 };
778d2817 2934 int status;
1da177e4 2935
7c513058 2936 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 2937 if (status == 0)
16e42959 2938 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 2939 return status;
2940}
2941
2942static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2943{
2944 struct nfs4_exception exception = { };
2945 int err;
2946 do {
2947 err = nfs4_handle_exception(NFS_SERVER(dir),
2948 _nfs4_proc_remove(dir, name),
2949 &exception);
2950 } while (exception.retry);
2951 return err;
2952}
2953
e4eff1a6 2954static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2955{
e4eff1a6
TM		 2956 struct nfs_server *server = NFS_SERVER(dir);
2957 struct nfs_removeargs *args = msg->rpc_argp;
2958 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2959
e4eff1a6 2960 res->server = server;
1da177e4 2961 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 2962 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 2963}
2964
34e137cc
BS		 2965static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2966{
d9afbd1b
TM		 2967 nfs4_setup_sequence(NFS_SERVER(data->dir),
2968 &data->args.seq_args,
2969 &data->res.seq_res,
2970 task);
1da177e4
LT		 2971}
2972
e4eff1a6 2973static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2974{
e4eff1a6
TM		 2975 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2976
14516c3a
TM		 2977 if (!nfs4_sequence_done(task, &res->seq_res))
2978 return 0;
9e33bed5 2979 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2980 return 0;
2981 update_changeattr(dir, &res->cinfo);
e4eff1a6 2982 return 1;
1da177e4
LT		 2983}
2984
d3d4152a
JL		 2985static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2986{
2987 struct nfs_server *server = NFS_SERVER(dir);
2988 struct nfs_renameargs *arg = msg->rpc_argp;
2989 struct nfs_renameres *res = msg->rpc_resp;
2990
2991 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 2992 res->server = server;
9d12b216 2993 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 2994}
2995
c6bfa1a1
BS		 2996static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2997{
d9afbd1b
TM		 2998 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2999 &data->args.seq_args,
3000 &data->res.seq_res,
3001 task);
d3d4152a
JL		 3002}
3003
3004static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3005 struct inode *new_dir)
3006{
3007 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3008
3009 if (!nfs4_sequence_done(task, &res->seq_res))
3010 return 0;
3011 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3012 return 0;
3013
3014 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3015 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3016 return 1;
3017}
3018
1da177e4
LT		 3019static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3020 struct inode *new_dir, struct qstr *new_name)
3021{
6caf2c82 3022 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3023 struct nfs_renameargs arg = {
1da177e4
LT		 3024 .old_dir = NFS_FH(old_dir),
3025 .new_dir = NFS_FH(new_dir),
3026 .old_name = old_name,
3027 .new_name = new_name,
6caf2c82 3028 };
e8582a8b 3029 struct nfs_renameres res = {
6caf2c82 3030 .server = server,
1da177e4 3031 };
1da177e4
LT		 3032 struct rpc_message msg = {
3033 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3034 .rpc_argp = &arg,
3035 .rpc_resp = &res,
3036 };
011fff72 3037 int status = -ENOMEM;
1da177e4 3038
7c513058 3039 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3040 if (!status) {
3041 update_changeattr(old_dir, &res.old_cinfo);
3042 update_changeattr(new_dir, &res.new_cinfo);
3043 }
3044 return status;
3045}
3046
3047static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3048 struct inode *new_dir, struct qstr *new_name)
3049{
3050 struct nfs4_exception exception = { };
3051 int err;
3052 do {
3053 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3054 _nfs4_proc_rename(old_dir, old_name,
3055 new_dir, new_name),
3056 &exception);
3057 } while (exception.retry);
3058 return err;
3059}
3060
3061static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3062{
91ba2eee 3063 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3064 struct nfs4_link_arg arg = {
3065 .fh = NFS_FH(inode),
3066 .dir_fh = NFS_FH(dir),
3067 .name = name,
91ba2eee
TM		 3068 .bitmask = server->attr_bitmask,
3069 };
91ba2eee
TM		 3070 struct nfs4_link_res res = {
3071 .server = server,
1da177e4 3072 };
1da177e4
LT		 3073 struct rpc_message msg = {
3074 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3075 .rpc_argp = &arg,
91ba2eee 3076 .rpc_resp = &res,
1da177e4 3077 };
136f2627
TM		 3078 int status = -ENOMEM;
3079
3080 res.fattr = nfs_alloc_fattr();
778d2817 3081 if (res.fattr == NULL)
136f2627 3082 goto out;
1da177e4 3083
7c513058 3084 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3085 if (!status) {
3086 update_changeattr(dir, &res.cinfo);
73a3d07c 3087 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3088 }
136f2627 3089out:
136f2627 3090 nfs_free_fattr(res.fattr);
1da177e4
LT		 3091 return status;
3092}
3093
3094static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3095{
3096 struct nfs4_exception exception = { };
3097 int err;
3098 do {
3099 err = nfs4_handle_exception(NFS_SERVER(inode),
3100 _nfs4_proc_link(inode, dir, name),
3101 &exception);
3102 } while (exception.retry);
3103 return err;
3104}
3105
57dc9a57
TM		 3106struct nfs4_createdata {
3107 struct rpc_message msg;
3108 struct nfs4_create_arg arg;
3109 struct nfs4_create_res res;
3110 struct nfs_fh fh;
3111 struct nfs_fattr fattr;
57dc9a57
TM		 3112};
3113
3114static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3115 struct qstr *name, struct iattr *sattr, u32 ftype)
3116{
3117 struct nfs4_createdata *data;
3118
3119 data = kzalloc(sizeof(*data), GFP_KERNEL);
3120 if (data != NULL) {
3121 struct nfs_server *server = NFS_SERVER(dir);
3122
3123 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3124 data->msg.rpc_argp = &data->arg;
3125 data->msg.rpc_resp = &data->res;
3126 data->arg.dir_fh = NFS_FH(dir);
3127 data->arg.server = server;
3128 data->arg.name = name;
3129 data->arg.attrs = sattr;
3130 data->arg.ftype = ftype;
3131 data->arg.bitmask = server->attr_bitmask;
3132 data->res.server = server;
3133 data->res.fh = &data->fh;
3134 data->res.fattr = &data->fattr;
57dc9a57 3135 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3136 }
3137 return data;
3138}
3139
3140static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3141{
7c513058 3142 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3143 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3144 if (status == 0) {
3145 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3146 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3147 }
3148 return status;
3149}
3150
3151static void nfs4_free_createdata(struct nfs4_createdata *data)
3152{
3153 kfree(data);
3154}
3155
4f390c15 3156static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3157 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3158{
57dc9a57
TM		 3159 struct nfs4_createdata *data;
3160 int status = -ENAMETOOLONG;
1da177e4 3161
94a6d753 3162 if (len > NFS4_MAXPATHLEN)
57dc9a57 3163 goto out;
4f390c15 3164
57dc9a57
TM		 3165 status = -ENOMEM;
3166 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3167 if (data == NULL)
3168 goto out;
3169
3170 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3171 data->arg.u.symlink.pages = &page;
3172 data->arg.u.symlink.len = len;
1da177e4 3173
57dc9a57
TM		 3174 status = nfs4_do_create(dir, dentry, data);
3175
3176 nfs4_free_createdata(data);
3177out:
1da177e4
LT		 3178 return status;
3179}
3180
4f390c15 3181static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3182 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3183{
3184 struct nfs4_exception exception = { };
3185 int err;
3186 do {
3187 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3188 _nfs4_proc_symlink(dir, dentry, page,
3189 len, sattr),
1da177e4
LT		 3190 &exception);
3191 } while (exception.retry);
3192 return err;
3193}
3194
3195static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3196 struct iattr *sattr)
3197{
57dc9a57
TM		 3198 struct nfs4_createdata *data;
3199 int status = -ENOMEM;
1da177e4 3200
57dc9a57
TM		 3201 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3202 if (data == NULL)
3203 goto out;
3204
3205 status = nfs4_do_create(dir, dentry, data);
3206
3207 nfs4_free_createdata(data);
3208out:
1da177e4
LT		 3209 return status;
3210}
3211
3212static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3213 struct iattr *sattr)
3214{
3215 struct nfs4_exception exception = { };
3216 int err;
a8a5da99
AK		 3217
3218 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3219 do {
3220 err = nfs4_handle_exception(NFS_SERVER(dir),
3221 _nfs4_proc_mkdir(dir, dentry, sattr),
3222 &exception);
3223 } while (exception.retry);
3224 return err;
3225}
3226
3227static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3228 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3229{
3230 struct inode *dir = dentry->d_inode;
3231 struct nfs4_readdir_arg args = {
3232 .fh = NFS_FH(dir),
56e4ebf8 3233 .pages = pages,
1da177e4
LT		 3234 .pgbase = 0,
3235 .count = count,
96d25e53 3236 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3237 .plus = plus,
1da177e4
LT		 3238 };
3239 struct nfs4_readdir_res res;
3240 struct rpc_message msg = {
3241 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3242 .rpc_argp = &args,
3243 .rpc_resp = &res,
3244 .rpc_cred = cred,
3245 };
3246 int status;
3247
3110ff80 3248 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3249 dentry->d_parent->d_name.name,
3250 dentry->d_name.name,
3251 (unsigned long long)cookie);
c3f52af3 3252 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3253 res.pgbase = args.pgbase;
7c513058 3254 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3255 if (status >= 0) {
c3f52af3 3256 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3257 status += args.pgbase;
3258 }
c4812998
TM		 3259
3260 nfs_invalidate_atime(dir);
3261
3110ff80 3262 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3263 return status;
3264}
3265
3266static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3267 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3268{
3269 struct nfs4_exception exception = { };
3270 int err;
3271 do {
3272 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3273 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3274 pages, count, plus),
1da177e4
LT		 3275 &exception);
3276 } while (exception.retry);
3277 return err;
3278}
3279
3280static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3281 struct iattr *sattr, dev_t rdev)
3282{
57dc9a57
TM		 3283 struct nfs4_createdata *data;
3284 int mode = sattr->ia_mode;
3285 int status = -ENOMEM;
1da177e4 3286
57dc9a57
TM		 3287 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3288 if (data == NULL)
3289 goto out;
3290
1da177e4 3291 if (S_ISFIFO(mode))
57dc9a57 3292 data->arg.ftype = NF4FIFO;
1da177e4 3293 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3294 data->arg.ftype = NF4BLK;
3295 data->arg.u.device.specdata1 = MAJOR(rdev);
3296 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3297 }
3298 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3299 data->arg.ftype = NF4CHR;
3300 data->arg.u.device.specdata1 = MAJOR(rdev);
3301 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3302 } else if (!S_ISSOCK(mode)) {
3303 status = -EINVAL;
3304 goto out_free;
1da177e4 3305 }
1da177e4 3306
57dc9a57 3307 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3308out_free:
57dc9a57
TM		 3309 nfs4_free_createdata(data);
3310out:
1da177e4
LT		 3311 return status;
3312}
3313
3314static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3315 struct iattr *sattr, dev_t rdev)
3316{
3317 struct nfs4_exception exception = { };
3318 int err;
a8a5da99
AK		 3319
3320 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3321 do {
3322 err = nfs4_handle_exception(NFS_SERVER(dir),
3323 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3324 &exception);
3325 } while (exception.retry);
3326 return err;
3327}
3328
3329static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3330 struct nfs_fsstat *fsstat)
3331{
3332 struct nfs4_statfs_arg args = {
3333 .fh = fhandle,
3334 .bitmask = server->attr_bitmask,
3335 };
24ad148a
BH		 3336 struct nfs4_statfs_res res = {
3337 .fsstat = fsstat,
3338 };
1da177e4
LT		 3339 struct rpc_message msg = {
3340 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3341 .rpc_argp = &args,
24ad148a 3342 .rpc_resp = &res,
1da177e4
LT		 3343 };
3344
0e574af1 3345 nfs_fattr_init(fsstat->fattr);
7c513058 3346 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3347}
3348
3349static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3350{
3351 struct nfs4_exception exception = { };
3352 int err;
3353 do {
3354 err = nfs4_handle_exception(server,
3355 _nfs4_proc_statfs(server, fhandle, fsstat),
3356 &exception);
3357 } while (exception.retry);
3358 return err;
3359}
3360
3361static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3362 struct nfs_fsinfo *fsinfo)
3363{
3364 struct nfs4_fsinfo_arg args = {
3365 .fh = fhandle,
3366 .bitmask = server->attr_bitmask,
3367 };
3dda5e43
BH		 3368 struct nfs4_fsinfo_res res = {
3369 .fsinfo = fsinfo,
3370 };
1da177e4
LT		 3371 struct rpc_message msg = {
3372 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3373 .rpc_argp = &args,
3dda5e43 3374 .rpc_resp = &res,
1da177e4
LT		 3375 };
3376
7c513058 3377 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3378}
3379
3380static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3381{
3382 struct nfs4_exception exception = { };
3383 int err;
3384
3385 do {
3386 err = nfs4_handle_exception(server,
3387 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3388 &exception);
3389 } while (exception.retry);
3390 return err;
3391}
3392
3393static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3394{
e38eb650
BS		 3395 int error;
3396
0e574af1 3397 nfs_fattr_init(fsinfo->fattr);
e38eb650 3398 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3399 if (error == 0) {
3400 /* block layout checks this! */
3401 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3402 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3403 }
e38eb650
BS		 3404
3405 return error;
1da177e4
LT		 3406}
3407
3408static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3409 struct nfs_pathconf *pathconf)
3410{
3411 struct nfs4_pathconf_arg args = {
3412 .fh = fhandle,
3413 .bitmask = server->attr_bitmask,
3414 };
d45b2989
BH		 3415 struct nfs4_pathconf_res res = {
3416 .pathconf = pathconf,
3417 };
1da177e4
LT		 3418 struct rpc_message msg = {
3419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3420 .rpc_argp = &args,
d45b2989 3421 .rpc_resp = &res,
1da177e4
LT		 3422 };
3423
3424 /* None of the pathconf attributes are mandatory to implement */
3425 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3426 memset(pathconf, 0, sizeof(*pathconf));
3427 return 0;
3428 }
3429
0e574af1 3430 nfs_fattr_init(pathconf->fattr);
7c513058 3431 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3432}
3433
3434static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3435 struct nfs_pathconf *pathconf)
3436{
3437 struct nfs4_exception exception = { };
3438 int err;
3439
3440 do {
3441 err = nfs4_handle_exception(server,
3442 _nfs4_proc_pathconf(server, fhandle, pathconf),
3443 &exception);
3444 } while (exception.retry);
3445 return err;
3446}
3447
d20581aa
BH		 3448void __nfs4_read_done_cb(struct nfs_read_data *data)
3449{
cd841605 3450 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3451}
3452
cbdabc7f 3453static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3454{
cd841605 3455 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3456
9e33bed5 3457 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3458 rpc_restart_call_prepare(task);
ec06c096 3459 return -EAGAIN;
1da177e4 3460 }
8850df99 3461
d20581aa 3462 __nfs4_read_done_cb(data);
1da177e4 3463 if (task->tk_status > 0)
ec06c096
TM		 3464 renew_lease(server, data->timestamp);
3465 return 0;
1da177e4
LT		 3466}
3467
cbdabc7f
AA		 3468static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3469{
3470
3471 dprintk("--> %s\n", __func__);
3472
3473 if (!nfs4_sequence_done(task, &data->res.seq_res))
3474 return -EAGAIN;
3475
d20581aa
BH		 3476 return data->read_done_cb ? data->read_done_cb(task, data) :
3477 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3478}
3479
bdc7f021 3480static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3481{
1da177e4 3482 data->timestamp = jiffies;
cbdabc7f 3483 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3484 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3485 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3486}
3487
ea7c3303
BS		 3488static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3489{
d9afbd1b
TM		 3490 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3491 &data->args.seq_args,
3492 &data->res.seq_res,
3493 task);
1da177e4
LT		 3494}
3495
b029bc9b 3496static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3497{
cd841605 3498 struct inode *inode = data->header->inode;
1da177e4 3499
9e33bed5 3500 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3501 rpc_restart_call_prepare(task);
788e7a89 3502 return -EAGAIN;
1da177e4 3503 }
4f9838c7 3504 if (task->tk_status >= 0) {
1da177e4 3505 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3506 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3507 }
788e7a89 3508 return 0;
1da177e4
LT		 3509}
3510
b029bc9b
FI		 3511static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3512{
3513 if (!nfs4_sequence_done(task, &data->res.seq_res))
3514 return -EAGAIN;
d20581aa
BH		 3515 return data->write_done_cb ? data->write_done_cb(task, data) :
3516 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3517}
3518
5a37f851
TM		 3519static
3520bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3521{
5a37f851
TM		 3522 const struct nfs_pgio_header *hdr = data->header;
3523
3524 /* Don't request attributes for pNFS or O_DIRECT writes */
3525 if (data->ds_clp != NULL || hdr->dreq != NULL)
3526 return false;
3527 /* Otherwise, request attributes if and only if we don't hold
3528 * a delegation
3529 */
011e2a7f 3530 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3531}
a69aef14 3532
bdc7f021 3533static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3534{
cd841605 3535 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3536
5a37f851 3537 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3538 data->args.bitmask = NULL;
3539 data->res.fattr = NULL;
3540 } else
3541 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3542
b029bc9b
FI		 3543 if (!data->write_done_cb)
3544 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3545 data->res.server = server;
1da177e4
LT		 3546 data->timestamp = jiffies;
3547
bdc7f021 3548 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3549 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3550}
3551
c6cb80d0
BS		 3552static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3553{
d9afbd1b
TM		 3554 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3555 &data->args.seq_args,
3556 &data->res.seq_res,
3557 task);
1da177e4
LT		 3558}
3559
0b7c0153 3560static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3561{
d9afbd1b
TM		 3562 nfs4_setup_sequence(NFS_SERVER(data->inode),
3563 &data->args.seq_args,
3564 &data->res.seq_res,
3565 task);
1da177e4
LT		 3566}
3567
0b7c0153 3568static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3569{
1da177e4 3570 struct inode *inode = data->inode;
14516c3a 3571
9e33bed5 3572 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3573 rpc_restart_call_prepare(task);
788e7a89 3574 return -EAGAIN;
1da177e4 3575 }
788e7a89 3576 return 0;
1da177e4
LT		 3577}
3578
0b7c0153 3579static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3580{
3581 if (!nfs4_sequence_done(task, &data->res.seq_res))
3582 return -EAGAIN;
0b7c0153 3583 return data->commit_done_cb(task, data);
5f452431
FI		 3584}
3585
0b7c0153 3586static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3587{
788e7a89 3588 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3589
0b7c0153
FI		 3590 if (data->commit_done_cb == NULL)
3591 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3592 data->res.server = server;
bdc7f021 3593 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3594 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3595}
3596
9bc4e3ca
CL		 3597struct nfs4_renewdata {
3598 struct nfs_client *client;
3599 unsigned long timestamp;
3600};
3601
1da177e4
LT		 3602/*
3603 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3604 * standalone procedure for queueing an asynchronous RENEW.
3605 */
9bc4e3ca 3606static void nfs4_renew_release(void *calldata)
dc96aef9 3607{
9bc4e3ca
CL		 3608 struct nfs4_renewdata *data = calldata;
3609 struct nfs_client *clp = data->client;
dc96aef9 3610
0851de06
AB		 3611 if (atomic_read(&clp->cl_count) > 1)
3612 nfs4_schedule_state_renewal(clp);
3613 nfs_put_client(clp);
9bc4e3ca 3614 kfree(data);
dc96aef9
AB		 3615}
3616
9bc4e3ca 3617static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3618{
9bc4e3ca
CL		 3619 struct nfs4_renewdata *data = calldata;
3620 struct nfs_client *clp = data->client;
3621 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3622
3623 if (task->tk_status < 0) {
95baa25c 3624 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3625 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3626 return;
3627 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3628 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3629 return;
3630 }
3631 nfs4_schedule_path_down_recovery(clp);
1da177e4 3632 }
452e9352 3633 do_renew_lease(clp, timestamp);
1da177e4
LT		 3634}
3635
963d8fe5
TM		 3636static const struct rpc_call_ops nfs4_renew_ops = {
3637 .rpc_call_done = nfs4_renew_done,
dc96aef9 3638 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3639};
3640
2f60ea6b 3641static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3642{
3643 struct rpc_message msg = {
3644 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3645 .rpc_argp = clp,
b4454fe1 3646 .rpc_cred = cred,
1da177e4 3647 };
9bc4e3ca 3648 struct nfs4_renewdata *data;
1da177e4 3649
2f60ea6b
TM		 3650 if (renew_flags == 0)
3651 return 0;
0851de06
AB		 3652 if (!atomic_inc_not_zero(&clp->cl_count))
3653 return -EIO;
b569ad34 3654 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3655 if (data == NULL)
3656 return -ENOMEM;
3657 data->client = clp;
3658 data->timestamp = jiffies;
1da177e4 3659 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3660 &nfs4_renew_ops, data);
1da177e4
LT		 3661}
3662
8534d4ec 3663static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3664{
3665 struct rpc_message msg = {
3666 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3667 .rpc_argp = clp,
b4454fe1 3668 .rpc_cred = cred,
1da177e4
LT		 3669 };
3670 unsigned long now = jiffies;
3671 int status;
3672
3673 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3674 if (status < 0)
3675 return status;
452e9352 3676 do_renew_lease(clp, now);
1da177e4
LT		 3677 return 0;
3678}
3679
aa1870af
BF		 3680static inline int nfs4_server_supports_acls(struct nfs_server *server)
3681{
3682 return (server->caps & NFS_CAP_ACLS)
3683 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3684 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3685}
3686
21f498c2
TM		 3687/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3688 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3689 * the stack.
3690 */
21f498c2 3691#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3692
e9e3d724
NH		 3693static int buf_to_pages_noslab(const void *buf, size_t buflen,
3694 struct page **pages, unsigned int *pgbase)
3695{
3696 struct page *newpage, **spages;
3697 int rc = 0;
3698 size_t len;
3699 spages = pages;
3700
3701 do {
21f498c2 3702 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3703 newpage = alloc_page(GFP_KERNEL);
3704
3705 if (newpage == NULL)
3706 goto unwind;
3707 memcpy(page_address(newpage), buf, len);
3708 buf += len;
3709 buflen -= len;
3710 *pages++ = newpage;
3711 rc++;
3712 } while (buflen != 0);
3713
3714 return rc;
3715
3716unwind:
3717 for(; rc > 0; rc--)
3718 __free_page(spages[rc-1]);
3719 return -ENOMEM;
3720}
3721
e50a1c2e
BF		 3722struct nfs4_cached_acl {
3723 int cached;
3724 size_t len;
3e9d4154 3725 char data[0];
e50a1c2e
BF		 3726};
3727
3728static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3729{
3730 struct nfs_inode *nfsi = NFS_I(inode);
3731
3732 spin_lock(&inode->i_lock);
3733 kfree(nfsi->nfs4_acl);
3734 nfsi->nfs4_acl = acl;
3735 spin_unlock(&inode->i_lock);
3736}
3737
3738static void nfs4_zap_acl_attr(struct inode *inode)
3739{
3740 nfs4_set_cached_acl(inode, NULL);
3741}
3742
3743static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3744{
3745 struct nfs_inode *nfsi = NFS_I(inode);
3746 struct nfs4_cached_acl *acl;
3747 int ret = -ENOENT;
3748
3749 spin_lock(&inode->i_lock);
3750 acl = nfsi->nfs4_acl;
3751 if (acl == NULL)
3752 goto out;
3753 if (buf == NULL) /* user is just asking for length */
3754 goto out_len;
3755 if (acl->cached == 0)
3756 goto out;
3757 ret = -ERANGE; /* see getxattr(2) man page */
3758 if (acl->len > buflen)
3759 goto out;
3760 memcpy(buf, acl->data, acl->len);
3761out_len:
3762 ret = acl->len;
3763out:
3764 spin_unlock(&inode->i_lock);
3765 return ret;
3766}
3767
5794d21e 3768static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3769{
3770 struct nfs4_cached_acl *acl;
b291f1b1 3771 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3772
1f1ea6c2 3773 if (buflen <= PAGE_SIZE) {
b291f1b1 3774 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3775 if (acl == NULL)
3776 goto out;
3777 acl->cached = 1;
5794d21e 3778 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3779 } else {
3780 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3781 if (acl == NULL)
3782 goto out;
3783 acl->cached = 0;
3784 }
3785 acl->len = acl_len;
3786out:
3787 nfs4_set_cached_acl(inode, acl);
3788}
3789
bf118a34
AA		 3790/*
3791 * The getxattr API returns the required buffer length when called with a
3792 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3793 * the required buf. On a NULL buf, we send a page of data to the server
3794 * guessing that the ACL request can be serviced by a page. If so, we cache
3795 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3796 * the cache. If not so, we throw away the page, and cache the required
3797 * length. The next getxattr call will then produce another round trip to
3798 * the server, this time with the input buf of the required size.
3799 */
16b4289c 3800static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3801{
bf118a34 3802 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3803 struct nfs_getaclargs args = {
3804 .fh = NFS_FH(inode),
3805 .acl_pages = pages,
3806 .acl_len = buflen,
3807 };
663c79b3
BH		 3808 struct nfs_getaclres res = {
3809 .acl_len = buflen,
3810 };
aa1870af
BF		 3811 struct rpc_message msg = {
3812 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3813 .rpc_argp = &args,
663c79b3 3814 .rpc_resp = &res,
aa1870af 3815 };
21f498c2
TM		 3816 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3817 int ret = -ENOMEM, i;
aa1870af 3818
bf118a34
AA		 3819 /* As long as we're doing a round trip to the server anyway,
3820 * let's be prepared for a page of acl data. */
3821 if (npages == 0)
3822 npages = 1;
21f498c2
TM		 3823 if (npages > ARRAY_SIZE(pages))
3824 return -ERANGE;
5a006899 3825
bf118a34
AA		 3826 for (i = 0; i < npages; i++) {
3827 pages[i] = alloc_page(GFP_KERNEL);
3828 if (!pages[i])
3829 goto out_free;
e50a1c2e 3830 }
5a006899
SP		 3831
3832 /* for decoding across pages */
3833 res.acl_scratch = alloc_page(GFP_KERNEL);
3834 if (!res.acl_scratch)
3835 goto out_free;
3836
bf118a34
AA		 3837 args.acl_len = npages * PAGE_SIZE;
3838 args.acl_pgbase = 0;
5a006899 3839
de040bec 3840 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3841 __func__, buf, buflen, npages, args.acl_len);
3842 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3843 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3844 if (ret)
3845 goto out_free;
bf118a34 3846
1f1ea6c2
TM		 3847 /* Handle the case where the passed-in buffer is too short */
3848 if (res.acl_flags & NFS4_ACL_TRUNC) {
3849 /* Did the user only issue a request for the acl length? */
3850 if (buf == NULL)
3851 goto out_ok;
e50a1c2e 3852 ret = -ERANGE;
1f1ea6c2 3853 goto out_free;
e50a1c2e 3854 }
1f1ea6c2 3855 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 3856 if (buf) {
3857 if (res.acl_len > buflen) {
3858 ret = -ERANGE;
3859 goto out_free;
3860 }
1f1ea6c2 3861 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 3862 }
1f1ea6c2
TM		 3863out_ok:
3864 ret = res.acl_len;
e50a1c2e 3865out_free:
bf118a34
AA		 3866 for (i = 0; i < npages; i++)
3867 if (pages[i])
3868 __free_page(pages[i]);
331818f1
TM		 3869 if (res.acl_scratch)
3870 __free_page(res.acl_scratch);
aa1870af
BF		 3871 return ret;
3872}
3873
16b4289c
TM		 3874static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3875{
3876 struct nfs4_exception exception = { };
3877 ssize_t ret;
3878 do {
3879 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3880 if (ret >= 0)
3881 break;
3882 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3883 } while (exception.retry);
3884 return ret;
3885}
3886
e50a1c2e
BF		 3887static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3888{
3889 struct nfs_server *server = NFS_SERVER(inode);
3890 int ret;
3891
3892 if (!nfs4_server_supports_acls(server))
3893 return -EOPNOTSUPP;
3894 ret = nfs_revalidate_inode(server, inode);
3895 if (ret < 0)
3896 return ret;
08a22b39
AK		 3897 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3898 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3899 ret = nfs4_read_cached_acl(inode, buf, buflen);
3900 if (ret != -ENOENT)
bf118a34
AA		 3901 /* -ENOENT is returned if there is no ACL or if there is an ACL
3902 * but no cached acl data, just the acl length */
e50a1c2e
BF		 3903 return ret;
3904 return nfs4_get_acl_uncached(inode, buf, buflen);
3905}
3906
16b4289c 3907static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3908{
3909 struct nfs_server *server = NFS_SERVER(inode);
3910 struct page *pages[NFS4ACL_MAXPAGES];
3911 struct nfs_setaclargs arg = {
3912 .fh = NFS_FH(inode),
3913 .acl_pages = pages,
3914 .acl_len = buflen,
3915 };
73c403a9 3916 struct nfs_setaclres res;
4b580ee3
BF		 3917 struct rpc_message msg = {
3918 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3919 .rpc_argp = &arg,
73c403a9 3920 .rpc_resp = &res,
4b580ee3 3921 };
21f498c2 3922 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 3923 int ret, i;
4b580ee3
BF		 3924
3925 if (!nfs4_server_supports_acls(server))
3926 return -EOPNOTSUPP;
21f498c2
TM		 3927 if (npages > ARRAY_SIZE(pages))
3928 return -ERANGE;
e9e3d724
NH		 3929 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3930 if (i < 0)
3931 return i;
57ec14c5 3932 nfs4_inode_return_delegation(inode);
7c513058 3933 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3934
3935 /*
3936 * Free each page after tx, so the only ref left is
3937 * held by the network stack
3938 */
3939 for (; i > 0; i--)
3940 put_page(pages[i-1]);
3941
08a22b39
AK		 3942 /*
3943 * Acl update can result in inode attribute update.
3944 * so mark the attribute cache invalid.
3945 */
3946 spin_lock(&inode->i_lock);
3947 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3948 spin_unlock(&inode->i_lock);
f41f7418
TM		 3949 nfs_access_zap_cache(inode);
3950 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3951 return ret;
3952}
3953
16b4289c
TM		 3954static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3955{
3956 struct nfs4_exception exception = { };
3957 int err;
3958 do {
3959 err = nfs4_handle_exception(NFS_SERVER(inode),
3960 __nfs4_proc_set_acl(inode, buf, buflen),
3961 &exception);
3962 } while (exception.retry);
3963 return err;
3964}
3965
1da177e4 3966static int
aa5190d0 3967nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3968{
aa5190d0
TM		 3969 struct nfs_client *clp = server->nfs_client;
3970
3971 if (task->tk_status >= 0)
1da177e4
LT		 3972 return 0;
3973 switch(task->tk_status) {
a1d0b5ee 3974 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 3975 case -NFS4ERR_ADMIN_REVOKED:
3976 case -NFS4ERR_BAD_STATEID:
14977489
TM		 3977 if (state == NULL)
3978 break;
3979 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 3980 case -NFS4ERR_OPENMODE:
3981 if (state == NULL)
3982 break;
0400a6b0
TM		 3983 nfs4_schedule_stateid_recovery(server, state);
3984 goto wait_on_recovery;
0ced63d1
TM		 3985 case -NFS4ERR_EXPIRED:
3986 if (state != NULL)
3987 nfs4_schedule_stateid_recovery(server, state);
1da177e4 3988 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3989 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 3990 nfs4_schedule_lease_recovery(clp);
3991 goto wait_on_recovery;
4745e315
AA		 3992#if defined(CONFIG_NFS_V4_1)
3993 case -NFS4ERR_BADSESSION:
3994 case -NFS4ERR_BADSLOT:
3995 case -NFS4ERR_BAD_HIGH_SLOT:
3996 case -NFS4ERR_DEADSESSION:
3997 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3998 case -NFS4ERR_SEQ_FALSE_RETRY:
3999 case -NFS4ERR_SEQ_MISORDERED:
4000 dprintk("%s ERROR %d, Reset session\n", __func__,
4001 task->tk_status);
9f594791 4002 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4003 task->tk_status = 0;
4004 return -EAGAIN;
4005#endif /* CONFIG_NFS_V4_1 */
1da177e4 4006 case -NFS4ERR_DELAY:
aa5190d0 4007 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4008 case -NFS4ERR_GRACE:
1da177e4
LT		 4009 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4010 task->tk_status = 0;
4011 return -EAGAIN;
a8a4ae3a 4012 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4013 case -NFS4ERR_OLD_STATEID:
4014 task->tk_status = 0;
4015 return -EAGAIN;
4016 }
4017 task->tk_status = nfs4_map_errors(task->tk_status);
4018 return 0;
0400a6b0 4019wait_on_recovery:
a2c0b9e2 4020 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4021 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4022 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4023 task->tk_status = 0;
4024 return -EAGAIN;
1da177e4
LT		 4025}
4026
f092075d
CL		 4027static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4028 nfs4_verifier *bootverf)
cd93710e
CL		 4029{
4030 __be32 verf[2];
4031
2c820d9a
CL		 4032 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4033 /* An impossible timestamp guarantees this value
4034 * will never match a generated boot time. */
4035 verf[0] = 0;
4036 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4037 } else {
f092075d
CL		 4038 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4039 verf[0] = (__be32)nn->boot_time.tv_sec;
4040 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4041 }
cd93710e
CL		 4042 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4043}
4044
e984a55a
CL		 4045static unsigned int
4046nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4047 char *buf, size_t len)
4048{
4049 unsigned int result;
4050
4051 rcu_read_lock();
4052 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4053 clp->cl_ipaddr,
4054 rpc_peeraddr2str(clp->cl_rpcclient,
4055 RPC_DISPLAY_ADDR),
4056 rpc_peeraddr2str(clp->cl_rpcclient,
4057 RPC_DISPLAY_PROTO));
4058 rcu_read_unlock();
4059 return result;
4060}
4061
4062static unsigned int
4063nfs4_init_uniform_client_string(const struct nfs_client *clp,
4064 char *buf, size_t len)
4065{
6f2ea7f2
CL		 4066 char *nodename = clp->cl_rpcclient->cl_nodename;
4067
4068 if (nfs4_client_id_uniquifier[0] != '\0')
4069 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4070 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4071 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4072 nodename);
e984a55a
CL		 4073}
4074
6bbb4ae8
CL		 4075/**
4076 * nfs4_proc_setclientid - Negotiate client ID
4077 * @clp: state data structure
4078 * @program: RPC program for NFSv4 callback service
4079 * @port: IP port number for NFS4 callback service
4080 * @cred: RPC credential to use for this call
4081 * @res: where to place the result
4082 *
4083 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4084 */
bb8b27e5
TM		 4085int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4086 unsigned short port, struct rpc_cred *cred,
4087 struct nfs4_setclientid_res *res)
1da177e4
LT		 4088{
4089 nfs4_verifier sc_verifier;
4090 struct nfs4_setclientid setclientid = {
4091 .sc_verifier = &sc_verifier,
4092 .sc_prog = program,
f4eecd5d 4093 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4094 };
4095 struct rpc_message msg = {
4096 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4097 .rpc_argp = &setclientid,
bb8b27e5 4098 .rpc_resp = res,
286d7d6a 4099 .rpc_cred = cred,
1da177e4 4100 };
6bbb4ae8 4101 int status;
1da177e4 4102
de734831 4103 /* nfs_client_id4 */
f092075d 4104 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4105 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4106 setclientid.sc_name_len =
4107 nfs4_init_uniform_client_string(clp,
4108 setclientid.sc_name,
4109 sizeof(setclientid.sc_name));
4110 else
4111 setclientid.sc_name_len =
4112 nfs4_init_nonuniform_client_string(clp,
4113 setclientid.sc_name,
4114 sizeof(setclientid.sc_name));
de734831 4115 /* cb_client4 */
e984a55a 4116 rcu_read_lock();
de734831 4117 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4118 sizeof(setclientid.sc_netid),
4119 rpc_peeraddr2str(clp->cl_rpcclient,
4120 RPC_DISPLAY_NETID));
de734831
CL		 4121 rcu_read_unlock();
4122 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4123 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4124 clp->cl_ipaddr, port >> 8, port & 255);
4125
6bbb4ae8
CL		 4126 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4127 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4128 setclientid.sc_name_len, setclientid.sc_name);
4129 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4130 dprintk("NFS reply setclientid: %d\n", status);
4131 return status;
1da177e4
LT		 4132}
4133
6bbb4ae8
CL		 4134/**
4135 * nfs4_proc_setclientid_confirm - Confirm client ID
4136 * @clp: state data structure
4137 * @res: result of a previous SETCLIENTID
4138 * @cred: RPC credential to use for this call
4139 *
4140 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4141 */
fd954ae1 4142int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4143 struct nfs4_setclientid_res *arg,
4144 struct rpc_cred *cred)
1da177e4
LT		 4145{
4146 struct nfs_fsinfo fsinfo;
4147 struct rpc_message msg = {
4148 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4149 .rpc_argp = arg,
1da177e4 4150 .rpc_resp = &fsinfo,
286d7d6a 4151 .rpc_cred = cred,
1da177e4
LT		 4152 };
4153 unsigned long now;
4154 int status;
4155
6bbb4ae8
CL		 4156 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4157 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4158 clp->cl_clientid);
1da177e4 4159 now = jiffies;
1bd714f2 4160 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4161 if (status == 0) {
4162 spin_lock(&clp->cl_lock);
4163 clp->cl_lease_time = fsinfo.lease_time * HZ;
4164 clp->cl_last_renewal = now;
4165 spin_unlock(&clp->cl_lock);
4166 }
6bbb4ae8 4167 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4168 return status;
4169}
4170
fe650407
TM		 4171struct nfs4_delegreturndata {
4172 struct nfs4_delegreturnargs args;
fa178f29 4173 struct nfs4_delegreturnres res;
fe650407
TM		 4174 struct nfs_fh fh;
4175 nfs4_stateid stateid;
26e976a8 4176 unsigned long timestamp;
fa178f29 4177 struct nfs_fattr fattr;
fe650407
TM		 4178 int rpc_status;
4179};
4180
fe650407
TM		 4181static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4182{
4183 struct nfs4_delegreturndata *data = calldata;
938e1010 4184
14516c3a
TM		 4185 if (!nfs4_sequence_done(task, &data->res.seq_res))
4186 return;
938e1010 4187
79708861
RL		 4188 switch (task->tk_status) {
4189 case -NFS4ERR_STALE_STATEID:
4190 case -NFS4ERR_EXPIRED:
4191 case 0:
fa178f29 4192 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4193 break;
4194 default:
4195 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4196 -EAGAIN) {
d00c5d43 4197 rpc_restart_call_prepare(task);
79708861
RL		 4198 return;
4199 }
4200 }
4201 data->rpc_status = task->tk_status;
fe650407
TM		 4202}
4203
4204static void nfs4_delegreturn_release(void *calldata)
4205{
fe650407
TM		 4206 kfree(calldata);
4207}
4208
938e1010
AA		 4209#if defined(CONFIG_NFS_V4_1)
4210static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4211{
4212 struct nfs4_delegreturndata *d_data;
4213
4214 d_data = (struct nfs4_delegreturndata *)data;
4215
d9afbd1b
TM		 4216 nfs4_setup_sequence(d_data->res.server,
4217 &d_data->args.seq_args,
4218 &d_data->res.seq_res,
4219 task);
938e1010
AA		 4220}
4221#endif /* CONFIG_NFS_V4_1 */
4222
c8d149f3 4223static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4224#if defined(CONFIG_NFS_V4_1)
4225 .rpc_call_prepare = nfs4_delegreturn_prepare,
4226#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4227 .rpc_call_done = nfs4_delegreturn_done,
4228 .rpc_release = nfs4_delegreturn_release,
4229};
4230
e6f81075 4231static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4232{
4233 struct nfs4_delegreturndata *data;
fa178f29 4234 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4235 struct rpc_task *task;
5138fde0
TM		 4236 struct rpc_message msg = {
4237 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4238 .rpc_cred = cred,
4239 };
c970aa85
TM		 4240 struct rpc_task_setup task_setup_data = {
4241 .rpc_client = server->client,
5138fde0 4242 .rpc_message = &msg,
c970aa85
TM		 4243 .callback_ops = &nfs4_delegreturn_ops,
4244 .flags = RPC_TASK_ASYNC,
4245 };
e6f81075 4246 int status = 0;
fe650407 4247
8535b2be 4248 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4249 if (data == NULL)
4250 return -ENOMEM;
9d12b216 4251 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4252 data->args.fhandle = &data->fh;
4253 data->args.stateid = &data->stateid;
9e907fec 4254 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4255 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4256 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4257 data->res.fattr = &data->fattr;
4258 data->res.server = server;
5138fde0 4259 nfs_fattr_init(data->res.fattr);
26e976a8 4260 data->timestamp = jiffies;
fe650407
TM		 4261 data->rpc_status = 0;
4262
c970aa85 4263 task_setup_data.callback_data = data;
1174dd1f
TM		 4264 msg.rpc_argp = &data->args;
4265 msg.rpc_resp = &data->res;
c970aa85 4266 task = rpc_run_task(&task_setup_data);
7a1218a2 4267 if (IS_ERR(task))
fe650407 4268 return PTR_ERR(task);
e6f81075
TM		 4269 if (!issync)
4270 goto out;
fe650407 4271 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4272 if (status != 0)
4273 goto out;
4274 status = data->rpc_status;
e144cbcc
TM		 4275 if (status == 0)
4276 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4277 else
4278 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4279out:
e6b3c4db 4280 rpc_put_task(task);
fe650407 4281 return status;
1da177e4
LT		 4282}
4283
e6f81075 4284int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4285{
4286 struct nfs_server *server = NFS_SERVER(inode);
4287 struct nfs4_exception exception = { };
4288 int err;
4289 do {
e6f81075 4290 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4291 switch (err) {
4292 case -NFS4ERR_STALE_STATEID:
4293 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4294 case 0:
4295 return 0;
4296 }
4297 err = nfs4_handle_exception(server, err, &exception);
4298 } while (exception.retry);
4299 return err;
4300}
4301
4302#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4303#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4304
4305/*
4306 * sleep, with exponential backoff, and retry the LOCK operation.
4307 */
4308static unsigned long
4309nfs4_set_lock_task_retry(unsigned long timeout)
4310{
d310310c 4311 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4312 timeout <<= 1;
4313 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4314 return NFS4_LOCK_MAXTIMEOUT;
4315 return timeout;
4316}
4317
1da177e4
LT		 4318static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4319{
4320 struct inode *inode = state->inode;
4321 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4322 struct nfs_client *clp = server->nfs_client;
911d1aaf 4323 struct nfs_lockt_args arg = {
1da177e4 4324 .fh = NFS_FH(inode),
911d1aaf 4325 .fl = request,
1da177e4 4326 };
911d1aaf
TM		 4327 struct nfs_lockt_res res = {
4328 .denied = request,
1da177e4
LT		 4329 };
4330 struct rpc_message msg = {
4331 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4332 .rpc_argp = &arg,
4333 .rpc_resp = &res,
4334 .rpc_cred = state->owner->so_cred,
4335 };
1da177e4
LT		 4336 struct nfs4_lock_state *lsp;
4337 int status;
4338
911d1aaf 4339 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4340 status = nfs4_set_lock_state(state, request);
4341 if (status != 0)
4342 goto out;
4343 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4344 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4345 arg.lock_owner.s_dev = server->s_dev;
7c513058 4346 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4347 switch (status) {
4348 case 0:
4349 request->fl_type = F_UNLCK;
4350 break;
4351 case -NFS4ERR_DENIED:
4352 status = 0;
1da177e4 4353 }
70cc6487 4354 request->fl_ops->fl_release_private(request);
8d0a8a9d 4355out:
1da177e4
LT		 4356 return status;
4357}
4358
4359static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4360{
4361 struct nfs4_exception exception = { };
4362 int err;
4363
4364 do {
4365 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4366 _nfs4_proc_getlk(state, cmd, request),
4367 &exception);
4368 } while (exception.retry);
4369 return err;
4370}
4371
4372static int do_vfs_lock(struct file *file, struct file_lock *fl)
4373{
4374 int res = 0;
4375 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4376 case FL_POSIX:
4377 res = posix_lock_file_wait(file, fl);
4378 break;
4379 case FL_FLOCK:
4380 res = flock_lock_file_wait(file, fl);
4381 break;
4382 default:
4383 BUG();
4384 }
1da177e4
LT		 4385 return res;
4386}
4387
faf5f49c 4388struct nfs4_unlockdata {
911d1aaf
TM		 4389 struct nfs_locku_args arg;
4390 struct nfs_locku_res res;
faf5f49c
TM		 4391 struct nfs4_lock_state *lsp;
4392 struct nfs_open_context *ctx;
911d1aaf
TM		 4393 struct file_lock fl;
4394 const struct nfs_server *server;
26e976a8 4395 unsigned long timestamp;
faf5f49c
TM		 4396};
4397
911d1aaf
TM		 4398static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4399 struct nfs_open_context *ctx,
4400 struct nfs4_lock_state *lsp,
4401 struct nfs_seqid *seqid)
4402{
4403 struct nfs4_unlockdata *p;
4404 struct inode *inode = lsp->ls_state->inode;
4405
8535b2be 4406 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4407 if (p == NULL)
4408 return NULL;
4409 p->arg.fh = NFS_FH(inode);
4410 p->arg.fl = &p->fl;
4411 p->arg.seqid = seqid;
c1d51931 4412 p->res.seqid = seqid;
911d1aaf
TM		 4413 p->arg.stateid = &lsp->ls_stateid;
4414 p->lsp = lsp;
4415 atomic_inc(&lsp->ls_count);
4416 /* Ensure we don't close file until we're done freeing locks! */
4417 p->ctx = get_nfs_open_context(ctx);
4418 memcpy(&p->fl, fl, sizeof(p->fl));
4419 p->server = NFS_SERVER(inode);
4420 return p;
4421}
4422
06f814a3 4423static void nfs4_locku_release_calldata(void *data)
faf5f49c 4424{
963d8fe5 4425 struct nfs4_unlockdata *calldata = data;
911d1aaf 4426 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4427 nfs4_put_lock_state(calldata->lsp);
4428 put_nfs_open_context(calldata->ctx);
4429 kfree(calldata);
faf5f49c
TM		 4430}
4431
963d8fe5 4432static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4433{
963d8fe5 4434 struct nfs4_unlockdata *calldata = data;
faf5f49c 4435
14516c3a
TM		 4436 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4437 return;
faf5f49c
TM		 4438 switch (task->tk_status) {
4439 case 0:
f597c537
TM		 4440 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4441 &calldata->res.stateid);
26e976a8 4442 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4443 break;
9e33bed5
TM		 4444 case -NFS4ERR_BAD_STATEID:
4445 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4446 case -NFS4ERR_STALE_STATEID:
4447 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4448 break;
4449 default:
9e33bed5 4450 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4451 rpc_restart_call_prepare(task);
faf5f49c 4452 }
2b1bc308 4453 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4454}
4455
4ce70ada 4456static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4457{
4ce70ada 4458 struct nfs4_unlockdata *calldata = data;
faf5f49c 4459
911d1aaf 4460 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 4461 goto out_wait;
795a88c9 4462 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 4463 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 4464 goto out_no_action;
faf5f49c 4465 }
26e976a8 4466 calldata->timestamp = jiffies;
035168ab 4467 if (nfs4_setup_sequence(calldata->server,
a893693c 4468 &calldata->arg.seq_args,
2240a9e2
TM		 4469 &calldata->res.seq_res,
4470 task) != 0)
4471 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 4472 return;
4473out_no_action:
4474 task->tk_action = NULL;
4475out_wait:
4476 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4477}
4478
963d8fe5 4479static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4480 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4481 .rpc_call_done = nfs4_locku_done,
06f814a3 4482 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4483};
4484
a5d16a4d
TM		 4485static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4486 struct nfs_open_context *ctx,
4487 struct nfs4_lock_state *lsp,
4488 struct nfs_seqid *seqid)
4489{
4490 struct nfs4_unlockdata *data;
5138fde0
TM		 4491 struct rpc_message msg = {
4492 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4493 .rpc_cred = ctx->cred,
4494 };
c970aa85
TM		 4495 struct rpc_task_setup task_setup_data = {
4496 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4497 .rpc_message = &msg,
c970aa85 4498 .callback_ops = &nfs4_locku_ops,
101070ca 4499 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4500 .flags = RPC_TASK_ASYNC,
4501 };
a5d16a4d 4502
137d6aca
FF		 4503 /* Ensure this is an unlock - when canceling a lock, the
4504 * canceled lock is passed in, and it won't be an unlock.
4505 */
4506 fl->fl_type = F_UNLCK;
4507
a5d16a4d
TM		 4508 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4509 if (data == NULL) {
4510 nfs_free_seqid(seqid);
4511 return ERR_PTR(-ENOMEM);
4512 }
4513
9d12b216 4514 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4515 msg.rpc_argp = &data->arg;
4516 msg.rpc_resp = &data->res;
c970aa85
TM		 4517 task_setup_data.callback_data = data;
4518 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4519}
4520
faf5f49c
TM		 4521static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4522{
65b62a29
TM		 4523 struct inode *inode = state->inode;
4524 struct nfs4_state_owner *sp = state->owner;
4525 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 4526 struct nfs_seqid *seqid;
1da177e4 4527 struct nfs4_lock_state *lsp;
06f814a3
TM		 4528 struct rpc_task *task;
4529 int status = 0;
536ff0f8 4530 unsigned char fl_flags = request->fl_flags;
faf5f49c 4531
8d0a8a9d 4532 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4533 /* Unlock _before_ we do the RPC call */
4534 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 4535 /* Exclude nfs_delegation_claim_locks() */
4536 mutex_lock(&sp->so_delegreturn_mutex);
4537 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 4538 down_read(&nfsi->rwsem);
4539 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4540 up_read(&nfsi->rwsem);
65b62a29 4541 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 4542 goto out;
19e03c57
TM		 4543 }
4544 up_read(&nfsi->rwsem);
65b62a29 4545 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 4546 if (status != 0)
9b073574
TM		 4547 goto out;
4548 /* Is this a delegated lock? */
4549 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4550 goto out;
8d0a8a9d 4551 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4552 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4553 status = -ENOMEM;
911d1aaf 4554 if (seqid == NULL)
9b073574 4555 goto out;
cd3758e3 4556 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4557 status = PTR_ERR(task);
4558 if (IS_ERR(task))
9b073574 4559 goto out;
a5d16a4d 4560 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4561 rpc_put_task(task);
9b073574 4562out:
536ff0f8 4563 request->fl_flags = fl_flags;
1da177e4
LT		 4564 return status;
4565}
4566
a5d16a4d
TM		 4567struct nfs4_lockdata {
4568 struct nfs_lock_args arg;
4569 struct nfs_lock_res res;
4570 struct nfs4_lock_state *lsp;
4571 struct nfs_open_context *ctx;
4572 struct file_lock fl;
26e976a8 4573 unsigned long timestamp;
a5d16a4d
TM		 4574 int rpc_status;
4575 int cancelled;
66179efe 4576 struct nfs_server *server;
a5d16a4d
TM		 4577};
4578
4579static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4580 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4581 gfp_t gfp_mask)
1da177e4 4582{
a5d16a4d
TM		 4583 struct nfs4_lockdata *p;
4584 struct inode *inode = lsp->ls_state->inode;
1da177e4 4585 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4586
8535b2be 4587 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4588 if (p == NULL)
4589 return NULL;
4590
4591 p->arg.fh = NFS_FH(inode);
4592 p->arg.fl = &p->fl;
8535b2be 4593 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4594 if (p->arg.open_seqid == NULL)
4595 goto out_free;
8535b2be 4596 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4597 if (p->arg.lock_seqid == NULL)
2f74c0a0 4598 goto out_free_seqid;
a5d16a4d 4599 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4600 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4601 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4602 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4603 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4604 p->lsp = lsp;
66179efe 4605 p->server = server;
a5d16a4d
TM		 4606 atomic_inc(&lsp->ls_count);
4607 p->ctx = get_nfs_open_context(ctx);
4608 memcpy(&p->fl, fl, sizeof(p->fl));
4609 return p;
2f74c0a0
TM		 4610out_free_seqid:
4611 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4612out_free:
4613 kfree(p);
4614 return NULL;
4615}
4616
4617static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4618{
4619 struct nfs4_lockdata *data = calldata;
4620 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4621
3110ff80 4622 dprintk("%s: begin!\n", __func__);
2f74c0a0 4623 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 4624 goto out_wait;
a5d16a4d
TM		 4625 /* Do we need to do an open_to_lock_owner? */
4626 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4627 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4628 goto out_release_lock_seqid;
8fe72bac 4629 }
a5d16a4d
TM		 4630 data->arg.open_stateid = &state->stateid;
4631 data->arg.new_lock_owner = 1;
c1d51931 4632 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4633 } else
4634 data->arg.new_lock_owner = 0;
26e976a8 4635 data->timestamp = jiffies;
035168ab
TM		 4636 if (nfs4_setup_sequence(data->server,
4637 &data->arg.seq_args,
2240a9e2 4638 &data->res.seq_res,
d9afbd1b 4639 task) == 0)
66179efe 4640 return;
2240a9e2
TM		 4641 nfs_release_seqid(data->arg.open_seqid);
4642out_release_lock_seqid:
4643 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 4644out_wait:
4645 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 4646 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4647}
4648
a5d16a4d
TM		 4649static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4650{
4651 struct nfs4_lockdata *data = calldata;
4652
3110ff80 4653 dprintk("%s: begin!\n", __func__);
a5d16a4d 4654
14516c3a
TM		 4655 if (!nfs4_sequence_done(task, &data->res.seq_res))
4656 return;
66179efe 4657
a5d16a4d 4658 data->rpc_status = task->tk_status;
a5d16a4d 4659 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4660 if (data->rpc_status == 0)
4661 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4662 else
4663 goto out;
4664 }
4665 if (data->rpc_status == 0) {
f597c537 4666 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4667 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4668 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4669 }
a5d16a4d 4670out:
3110ff80 4671 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4672}
4673
4674static void nfs4_lock_release(void *calldata)
4675{
4676 struct nfs4_lockdata *data = calldata;
4677
3110ff80 4678 dprintk("%s: begin!\n", __func__);
2f74c0a0 4679 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4680 if (data->cancelled != 0) {
4681 struct rpc_task *task;
4682 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4683 data->arg.lock_seqid);
4684 if (!IS_ERR(task))
bf294b41 4685 rpc_put_task_async(task);
3110ff80 4686 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4687 } else
4688 nfs_free_seqid(data->arg.lock_seqid);
4689 nfs4_put_lock_state(data->lsp);
4690 put_nfs_open_context(data->ctx);
4691 kfree(data);
3110ff80 4692 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4693}
4694
4695static const struct rpc_call_ops nfs4_lock_ops = {
4696 .rpc_call_prepare = nfs4_lock_prepare,
4697 .rpc_call_done = nfs4_lock_done,
4698 .rpc_release = nfs4_lock_release,
4699};
4700
2bee72a6
TM		 4701static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4702{
2bee72a6
TM		 4703 switch (error) {
4704 case -NFS4ERR_ADMIN_REVOKED:
4705 case -NFS4ERR_BAD_STATEID:
ecac799a 4706 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4707 if (new_lock_owner != 0 ||
795a88c9 4708 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4709 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4710 break;
4711 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4712 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4713 case -NFS4ERR_EXPIRED:
4714 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4715 };
4716}
4717
afe6c27c 4718static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4719{
4720 struct nfs4_lockdata *data;
4721 struct rpc_task *task;
5138fde0
TM		 4722 struct rpc_message msg = {
4723 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4724 .rpc_cred = state->owner->so_cred,
4725 };
c970aa85
TM		 4726 struct rpc_task_setup task_setup_data = {
4727 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4728 .rpc_message = &msg,
c970aa85 4729 .callback_ops = &nfs4_lock_ops,
101070ca 4730 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4731 .flags = RPC_TASK_ASYNC,
4732 };
a5d16a4d
TM		 4733 int ret;
4734
3110ff80 4735 dprintk("%s: begin!\n", __func__);
cd3758e3 4736 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4737 fl->fl_u.nfs4_fl.owner,
4738 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4739 if (data == NULL)
4740 return -ENOMEM;
4741 if (IS_SETLKW(cmd))
4742 data->arg.block = 1;
9d12b216 4743 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4744 msg.rpc_argp = &data->arg;
4745 msg.rpc_resp = &data->res;
c970aa85 4746 task_setup_data.callback_data = data;
8fe72bac
TM		 4747 if (recovery_type > NFS_LOCK_NEW) {
4748 if (recovery_type == NFS_LOCK_RECLAIM)
4749 data->arg.reclaim = NFS_LOCK_RECLAIM;
4750 nfs4_set_sequence_privileged(&data->arg.seq_args);
4751 }
c970aa85 4752 task = rpc_run_task(&task_setup_data);
7a1218a2 4753 if (IS_ERR(task))
a5d16a4d 4754 return PTR_ERR(task);
a5d16a4d
TM		 4755 ret = nfs4_wait_for_completion_rpc_task(task);
4756 if (ret == 0) {
4757 ret = data->rpc_status;
2bee72a6
TM		 4758 if (ret)
4759 nfs4_handle_setlk_error(data->server, data->lsp,
4760 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4761 } else
4762 data->cancelled = 1;
e6b3c4db 4763 rpc_put_task(task);
3110ff80 4764 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4765 return ret;
1da177e4
LT		 4766}
4767
4768static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4769{
202b50dc 4770 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4771 struct nfs4_exception exception = {
4772 .inode = state->inode,
4773 };
202b50dc
TM		 4774 int err;
4775
4776 do {
42a2d13e
TM		 4777 /* Cache the lock if possible... */
4778 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4779 return 0;
afe6c27c 4780 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4781 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4782 break;
4783 nfs4_handle_exception(server, err, &exception);
4784 } while (exception.retry);
4785 return err;
1da177e4
LT		 4786}
4787
4788static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4789{
202b50dc 4790 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4791 struct nfs4_exception exception = {
4792 .inode = state->inode,
4793 };
202b50dc
TM		 4794 int err;
4795
6bfc93ef
TM		 4796 err = nfs4_set_lock_state(state, request);
4797 if (err != 0)
4798 return err;
202b50dc 4799 do {
42a2d13e
TM		 4800 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4801 return 0;
afe6c27c 4802 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4803 switch (err) {
4804 default:
4805 goto out;
4806 case -NFS4ERR_GRACE:
4807 case -NFS4ERR_DELAY:
4808 nfs4_handle_exception(server, err, &exception);
4809 err = 0;
4810 }
202b50dc 4811 } while (exception.retry);
a9ed2e25 4812out:
202b50dc 4813 return err;
1da177e4
LT		 4814}
4815
f062eb6c 4816#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 4817/**
4818 * nfs41_check_expired_locks - possibly free a lock stateid
4819 *
4820 * @state: NFSv4 state for an inode
4821 *
4822 * Returns NFS_OK if recovery for this stateid is now finished.
4823 * Otherwise a negative NFS4ERR value is returned.
4824 */
b01dd1d8 4825static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4826{
eb64cf96 4827 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 4828 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4829 struct nfs_server *server = NFS_SERVER(state->inode);
4830
b01dd1d8 4831 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 4832 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 4833 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4834 if (status != NFS_OK) {
3e60ffdd
CL		 4835 /* Free the stateid unless the server
4836 * informs us the stateid is unrecognized. */
89af2739
CL		 4837 if (status != -NFS4ERR_BAD_STATEID)
4838 nfs41_free_stateid(server,
4839 &lsp->ls_stateid);
795a88c9 4840 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 4841 ret = status;
4842 }
4843 }
4844 };
4845
4846 return ret;
4847}
4848
4849static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4850{
4851 int status = NFS_OK;
4852
4853 if (test_bit(LK_STATE_IN_USE, &state->flags))
4854 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 4855 if (status != NFS_OK)
4856 status = nfs4_lock_expired(state, request);
4857 return status;
f062eb6c
BS		 4858}
4859#endif
4860
1da177e4
LT		 4861static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4862{
9a99af49 4863 struct nfs4_state_owner *sp = state->owner;
19e03c57 4864 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4865 unsigned char fl_flags = request->fl_flags;
9a99af49 4866 unsigned int seq;
8e469ebd 4867 int status = -ENOLCK;
1da177e4 4868
8e469ebd
TM		 4869 if ((fl_flags & FL_POSIX) &&
4870 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4871 goto out;
6bfc93ef 4872 /* Is this a delegated open? */
6bfc93ef
TM		 4873 status = nfs4_set_lock_state(state, request);
4874 if (status != 0)
4875 goto out;
01c3b861
TM		 4876 request->fl_flags |= FL_ACCESS;
4877 status = do_vfs_lock(request->fl_file, request);
4878 if (status < 0)
4879 goto out;
19e03c57 4880 down_read(&nfsi->rwsem);
01c3b861 4881 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4882 /* Yes: cache locks! */
01c3b861 4883 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4884 request->fl_flags = fl_flags & ~FL_SLEEP;
4885 status = do_vfs_lock(request->fl_file, request);
4886 goto out_unlock;
01c3b861 4887 }
9a99af49
TM		 4888 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
4889 up_read(&nfsi->rwsem);
afe6c27c 4890 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4891 if (status != 0)
9a99af49
TM		 4892 goto out;
4893 down_read(&nfsi->rwsem);
4894 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
4895 status = -NFS4ERR_DELAY;
01c3b861 4896 goto out_unlock;
9a99af49 4897 }
6bfc93ef 4898 /* Note: we always want to sleep here! */
01c3b861 4899 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4900 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 4901 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4902 "manager!\n", __func__);
01c3b861 4903out_unlock:
19e03c57 4904 up_read(&nfsi->rwsem);
01c3b861
TM		 4905out:
4906 request->fl_flags = fl_flags;
1da177e4
LT		 4907 return status;
4908}
4909
4910static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4911{
a1d0b5ee
TM		 4912 struct nfs4_exception exception = {
4913 .state = state,
05ffe24f 4914 .inode = state->inode,
a1d0b5ee 4915 };
1da177e4
LT		 4916 int err;
4917
4918 do {
965b5d67
TM		 4919 err = _nfs4_proc_setlk(state, cmd, request);
4920 if (err == -NFS4ERR_DENIED)
4921 err = -EAGAIN;
1da177e4 4922 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4923 err, &exception);
1da177e4
LT		 4924 } while (exception.retry);
4925 return err;
4926}
4927
4928static int
4929nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4930{
4931 struct nfs_open_context *ctx;
4932 struct nfs4_state *state;
4933 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4934 int status;
4935
4936 /* verify open state */
cd3758e3 4937 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4938 state = ctx->state;
4939
4940 if (request->fl_start < 0 || request->fl_end < 0)
4941 return -EINVAL;
4942
d953126a
TM		 4943 if (IS_GETLK(cmd)) {
4944 if (state != NULL)
4945 return nfs4_proc_getlk(state, F_GETLK, request);
4946 return 0;
4947 }
1da177e4
LT		 4948
4949 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4950 return -EINVAL;
4951
d953126a
TM		 4952 if (request->fl_type == F_UNLCK) {
4953 if (state != NULL)
4954 return nfs4_proc_unlck(state, cmd, request);
4955 return 0;
4956 }
1da177e4 4957
d953126a
TM		 4958 if (state == NULL)
4959 return -ENOLCK;
55725513
TM		 4960 /*
4961 * Don't rely on the VFS having checked the file open mode,
4962 * since it won't do this for flock() locks.
4963 */
f44106e2 4964 switch (request->fl_type) {
55725513
TM		 4965 case F_RDLCK:
4966 if (!(filp->f_mode & FMODE_READ))
4967 return -EBADF;
4968 break;
4969 case F_WRLCK:
4970 if (!(filp->f_mode & FMODE_WRITE))
4971 return -EBADF;
4972 }
4973
1da177e4
LT		 4974 do {
4975 status = nfs4_proc_setlk(state, cmd, request);
4976 if ((status != -EAGAIN) || IS_SETLK(cmd))
4977 break;
4978 timeout = nfs4_set_lock_task_retry(timeout);
4979 status = -ERESTARTSYS;
4980 if (signalled())
4981 break;
4982 } while(status < 0);
1da177e4
LT		 4983 return status;
4984}
4985
888e694c
TM		 4986int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4987{
4988 struct nfs_server *server = NFS_SERVER(state->inode);
4989 struct nfs4_exception exception = { };
4990 int err;
4991
4992 err = nfs4_set_lock_state(state, fl);
4993 if (err != 0)
4994 goto out;
4995 do {
afe6c27c 4996 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4997 switch (err) {
4998 default:
a030889a
WAA		 4999 printk(KERN_ERR "NFS: %s: unhandled error "
5000 "%d.\n", __func__, err);
d5122201 5001 case 0:
965b5d67 5002 case -ESTALE:
d5122201 5003 goto out;
d5122201 5004 case -NFS4ERR_STALE_CLIENTID:
965b5d67 5005 case -NFS4ERR_STALE_STATEID:
37380e42
TM		 5006 set_bit(NFS_DELEGATED_STATE, &state->flags);
5007 case -NFS4ERR_EXPIRED:
0400a6b0 5008 nfs4_schedule_lease_recovery(server->nfs_client);
37380e42 5009 err = -EAGAIN;
0400a6b0 5010 goto out;
74e7bb73
RL		 5011 case -NFS4ERR_BADSESSION:
5012 case -NFS4ERR_BADSLOT:
5013 case -NFS4ERR_BAD_HIGH_SLOT:
5014 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
5015 case -NFS4ERR_DEADSESSION:
37380e42 5016 set_bit(NFS_DELEGATED_STATE, &state->flags);
9f594791 5017 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
37380e42 5018 err = -EAGAIN;
d5122201 5019 goto out;
a1d0b5ee 5020 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 5021 case -NFS4ERR_ADMIN_REVOKED:
5022 case -NFS4ERR_BAD_STATEID:
5023 case -NFS4ERR_OPENMODE:
0400a6b0 5024 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 5025 err = 0;
5026 goto out;
5027 case -ENOMEM:
5028 case -NFS4ERR_DENIED:
5029 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
5030 err = 0;
5031 goto out;
d5122201 5032 }
37380e42 5033 set_bit(NFS_DELEGATED_STATE, &state->flags);
888e694c
TM		 5034 err = nfs4_handle_exception(server, err, &exception);
5035 } while (exception.retry);
5036out:
5037 return err;
5038}
6b3b5496 5039
cf470c3e
TM		 5040struct nfs_release_lockowner_data {
5041 struct nfs4_lock_state *lsp;
5ae67c4f 5042 struct nfs_server *server;
cf470c3e
TM		 5043 struct nfs_release_lockowner_args args;
5044};
5045
d3c7b7cc
TM		 5046static void nfs4_release_lockowner_release(void *calldata)
5047{
cf470c3e 5048 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5049 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5050 kfree(calldata);
5051}
5052
17280175 5053static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5054 .rpc_release = nfs4_release_lockowner_release,
5055};
5056
cf470c3e 5057int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 5058{
5059 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 5060 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5061 struct rpc_message msg = {
5062 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5063 };
5064
5065 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5066 return -EINVAL;
5067 data = kmalloc(sizeof(*data), GFP_NOFS);
5068 if (!data)
5069 return -ENOMEM;
5070 data->lsp = lsp;
5ae67c4f 5071 data->server = server;
cf470c3e
TM		 5072 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5073 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5074 data->args.lock_owner.s_dev = server->s_dev;
5075 msg.rpc_argp = &data->args;
5076 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5077 return 0;
d3c7b7cc
TM		 5078}
5079
aa1870af
BF		 5080#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5081
64c2ce8b
AK		 5082static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5083 const void *buf, size_t buflen,
5084 int flags, int type)
6b3b5496 5085{
64c2ce8b
AK		 5086 if (strcmp(key, "") != 0)
5087 return -EINVAL;
4b580ee3 5088
64c2ce8b 5089 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5090}
5091
64c2ce8b
AK		 5092static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5093 void *buf, size_t buflen, int type)
6b3b5496 5094{
64c2ce8b
AK		 5095 if (strcmp(key, "") != 0)
5096 return -EINVAL;
aa1870af 5097
64c2ce8b 5098 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5099}
5100
64c2ce8b
AK		 5101static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5102 size_t list_len, const char *name,
5103 size_t name_len, int type)
6b3b5496 5104{
64c2ce8b 5105 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5106
096455a2
BF		 5107 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5108 return 0;
64c2ce8b
AK		 5109
5110 if (list && len <= list_len)
5111 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5112 return len;
6b3b5496
BF		 5113}
5114
533eb461
AA		 5115/*
5116 * nfs_fhget will use either the mounted_on_fileid or the fileid
5117 */
69aaaae1
TM		 5118static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5119{
533eb461
AA		 5120 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5121 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5122 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5123 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5124 return;
5125
5126 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5127 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5128 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5129 fattr->nlink = 2;
5130}
5131
f05d147f
BS		 5132static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5133 const struct qstr *name,
5134 struct nfs4_fs_locations *fs_locations,
5135 struct page *page)
683b57b4
TM		 5136{
5137 struct nfs_server *server = NFS_SERVER(dir);
5138 u32 bitmask[2] = {
361e624f 5139 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5140 };
5141 struct nfs4_fs_locations_arg args = {
5142 .dir_fh = NFS_FH(dir),
c228fd3a 5143 .name = name,
683b57b4
TM		 5144 .page = page,
5145 .bitmask = bitmask,
5146 };
22958463
BH		 5147 struct nfs4_fs_locations_res res = {
5148 .fs_locations = fs_locations,
5149 };
683b57b4
TM		 5150 struct rpc_message msg = {
5151 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5152 .rpc_argp = &args,
22958463 5153 .rpc_resp = &res,
683b57b4
TM		 5154 };
5155 int status;
5156
3110ff80 5157 dprintk("%s: start\n", __func__);
533eb461
AA		 5158
5159 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5160 * is not supported */
5161 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5162 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5163 else
5164 bitmask[0] |= FATTR4_WORD0_FILEID;
5165
c228fd3a 5166 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5167 fs_locations->server = server;
830b8e33 5168 fs_locations->nlocations = 0;
f05d147f 5169 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5170 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5171 return status;
5172}
5173
f05d147f
BS		 5174int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5175 const struct qstr *name,
5176 struct nfs4_fs_locations *fs_locations,
5177 struct page *page)
db0a9593
BS		 5178{
5179 struct nfs4_exception exception = { };
5180 int err;
5181 do {
5182 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5183 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5184 &exception);
5185 } while (exception.retry);
5186 return err;
5187}
5188
5a5ea0d4
BS		 5189static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5190{
5191 int status;
5192 struct nfs4_secinfo_arg args = {
5193 .dir_fh = NFS_FH(dir),
5194 .name = name,
5195 };
5196 struct nfs4_secinfo_res res = {
5197 .flavors = flavors,
5198 };
5199 struct rpc_message msg = {
5200 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5201 .rpc_argp = &args,
5202 .rpc_resp = &res,
5203 };
5204
5205 dprintk("NFS call secinfo %s\n", name->name);
5206 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5207 dprintk("NFS reply secinfo: %d\n", status);
5208 return status;
5209}
5210
72de53ec
BS		 5211int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5212 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5213{
5214 struct nfs4_exception exception = { };
5215 int err;
5216 do {
5217 err = nfs4_handle_exception(NFS_SERVER(dir),
5218 _nfs4_proc_secinfo(dir, name, flavors),
5219 &exception);
5220 } while (exception.retry);
5221 return err;
5222}
5223
557134a3 5224#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5225/*
5226 * Check the exchange flags returned by the server for invalid flags, having
5227 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5228 * DS flags set.
5229 */
5230static int nfs4_check_cl_exchange_flags(u32 flags)
5231{
5232 if (flags & ~EXCHGID4_FLAG_MASK_R)
5233 goto out_inval;
5234 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5235 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5236 goto out_inval;
5237 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5238 goto out_inval;
5239 return NFS_OK;
5240out_inval:
5241 return -NFS4ERR_INVAL;
5242}
5243
78fe0f41 5244static bool
79d4e1f0
CL		 5245nfs41_same_server_scope(struct nfs41_server_scope *a,
5246 struct nfs41_server_scope *b)
78fe0f41
WAA		 5247{
5248 if (a->server_scope_sz == b->server_scope_sz &&
5249 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5250 return true;
5251
5252 return false;
5253}
5254
7c44f1ae
WAA		 5255/*
5256 * nfs4_proc_bind_conn_to_session()
5257 *
5258 * The 4.1 client currently uses the same TCP connection for the
5259 * fore and backchannel.
5260 */
2cf047c9 5261int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5262{
5263 int status;
5264 struct nfs41_bind_conn_to_session_res res;
5265 struct rpc_message msg = {
5266 .rpc_proc =
5267 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5268 .rpc_argp = clp,
5269 .rpc_resp = &res,
2cf047c9 5270 .rpc_cred = cred,
7c44f1ae
WAA		 5271 };
5272
5273 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5274
5275 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5276 if (unlikely(res.session == NULL)) {
5277 status = -ENOMEM;
5278 goto out;
5279 }
5280
5281 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5282 if (status == 0) {
5283 if (memcmp(res.session->sess_id.data,
5284 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5285 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5286 status = -EIO;
5287 goto out_session;
5288 }
5289 if (res.dir != NFS4_CDFS4_BOTH) {
5290 dprintk("NFS: %s: Unexpected direction from server\n",
5291 __func__);
5292 status = -EIO;
5293 goto out_session;
5294 }
5295 if (res.use_conn_in_rdma_mode) {
5296 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5297 __func__);
5298 status = -EIO;
5299 goto out_session;
5300 }
5301 }
5302out_session:
5303 kfree(res.session);
5304out:
5305 dprintk("<-- %s status= %d\n", __func__, status);
5306 return status;
5307}
5308
99fe60d0
BH		 5309/*
5310 * nfs4_proc_exchange_id()
5311 *
6bbb4ae8
CL		 5312 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5313 *
99fe60d0
BH		 5314 * Since the clientid has expired, all compounds using sessions
5315 * associated with the stale clientid will be returning
5316 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5317 * be in some phase of session reset.
5318 */
4d643d1d 5319int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5320{
5321 nfs4_verifier verifier;
5322 struct nfs41_exchange_id_args args = {
cd93710e 5323 .verifier = &verifier,
99fe60d0 5324 .client = clp,
357f54d6 5325 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5326 };
5327 struct nfs41_exchange_id_res res = {
32b01310 5328 0
99fe60d0
BH		 5329 };
5330 int status;
5331 struct rpc_message msg = {
5332 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5333 .rpc_argp = &args,
5334 .rpc_resp = &res,
5335 .rpc_cred = cred,
5336 };
99fe60d0 5337
f092075d 5338 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5339 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5340 sizeof(args.id));
6bbb4ae8
CL		 5341 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5342 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5343 args.id_len, args.id);
99fe60d0 5344
acdeb69d 5345 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5346 GFP_NOFS);
acdeb69d 5347 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5348 status = -ENOMEM;
5349 goto out;
5350 }
78fe0f41 5351
79d4e1f0 5352 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5353 GFP_NOFS);
177313f1 5354 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5355 status = -ENOMEM;
acdeb69d 5356 goto out_server_owner;
abe9a6d5 5357 }
78fe0f41 5358
bbafffd2 5359 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5360 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5361 status = -ENOMEM;
5362 goto out_server_scope;
5363 }
5364
1bd714f2 5365 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5366 if (status == 0)
32b01310 5367 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5368
acdeb69d 5369 if (status == 0) {
32b01310
TM		 5370 clp->cl_clientid = res.clientid;
5371 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5372 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5373 clp->cl_seqid = res.seqid;
5374
acdeb69d
CL		 5375 kfree(clp->cl_serverowner);
5376 clp->cl_serverowner = res.server_owner;
5377 res.server_owner = NULL;
78fe0f41 5378
7d2ed9ac 5379 /* use the most recent implementation id */
59155546
CL		 5380 kfree(clp->cl_implid);
5381 clp->cl_implid = res.impl_id;
7d2ed9ac 5382
177313f1 5383 if (clp->cl_serverscope != NULL &&
79d4e1f0 5384 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5385 res.server_scope)) {
5386 dprintk("%s: server_scope mismatch detected\n",
5387 __func__);
5388 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5389 kfree(clp->cl_serverscope);
5390 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5391 }
5392
177313f1 5393 if (clp->cl_serverscope == NULL) {
79d4e1f0 5394 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5395 goto out;
5396 }
32b01310
TM		 5397 } else
5398 kfree(res.impl_id);
7d2ed9ac 5399
acdeb69d
CL		 5400out_server_owner:
5401 kfree(res.server_owner);
7d2ed9ac 5402out_server_scope:
abe9a6d5
WAA		 5403 kfree(res.server_scope);
5404out:
177313f1 5405 if (clp->cl_implid != NULL)
6bbb4ae8 5406 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5407 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5408 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5409 clp->cl_implid->date.seconds,
5410 clp->cl_implid->date.nseconds);
6bbb4ae8 5411 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5412 return status;
5413}
5414
66245539
TM		 5415static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5416 struct rpc_cred *cred)
5417{
5418 struct rpc_message msg = {
5419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5420 .rpc_argp = clp,
5421 .rpc_cred = cred,
5422 };
5423 int status;
5424
5425 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5426 if (status)
02c67525 5427 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5428 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5429 return status;
5430}
5431
5432static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5433 struct rpc_cred *cred)
5434{
5435 unsigned int loop;
5436 int ret;
5437
5438 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5439 ret = _nfs4_proc_destroy_clientid(clp, cred);
5440 switch (ret) {
5441 case -NFS4ERR_DELAY:
5442 case -NFS4ERR_CLIENTID_BUSY:
5443 ssleep(1);
5444 break;
5445 default:
5446 return ret;
5447 }
5448 }
5449 return 0;
5450}
5451
5452int nfs4_destroy_clientid(struct nfs_client *clp)
5453{
5454 struct rpc_cred *cred;
5455 int ret = 0;
5456
5457 if (clp->cl_mvops->minor_version < 1)
5458 goto out;
5459 if (clp->cl_exchange_flags == 0)
5460 goto out;
05f4c350
CL		 5461 if (clp->cl_preserve_clid)
5462 goto out;
66245539
TM		 5463 cred = nfs4_get_exchange_id_cred(clp);
5464 ret = nfs4_proc_destroy_clientid(clp, cred);
5465 if (cred)
5466 put_rpccred(cred);
5467 switch (ret) {
5468 case 0:
5469 case -NFS4ERR_STALE_CLIENTID:
5470 clp->cl_exchange_flags = 0;
5471 }
5472out:
5473 return ret;
5474}
5475
2050f0cc
AA		 5476struct nfs4_get_lease_time_data {
5477 struct nfs4_get_lease_time_args *args;
5478 struct nfs4_get_lease_time_res *res;
5479 struct nfs_client *clp;
5480};
5481
5482static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5483 void *calldata)
5484{
2050f0cc
AA		 5485 struct nfs4_get_lease_time_data *data =
5486 (struct nfs4_get_lease_time_data *)calldata;
5487
5488 dprintk("--> %s\n", __func__);
5489 /* just setup sequence, do not trigger session recovery
5490 since we're invoked within one */
d9afbd1b
TM		 5491 nfs41_setup_sequence(data->clp->cl_session,
5492 &data->args->la_seq_args,
5493 &data->res->lr_seq_res,
5494 task);
2050f0cc
AA		 5495 dprintk("<-- %s\n", __func__);
5496}
5497
5498/*
5499 * Called from nfs4_state_manager thread for session setup, so don't recover
5500 * from sequence operation or clientid errors.
5501 */
5502static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5503{
5504 struct nfs4_get_lease_time_data *data =
5505 (struct nfs4_get_lease_time_data *)calldata;
5506
5507 dprintk("--> %s\n", __func__);
14516c3a
TM		 5508 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5509 return;
2050f0cc
AA		 5510 switch (task->tk_status) {
5511 case -NFS4ERR_DELAY:
5512 case -NFS4ERR_GRACE:
5513 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5514 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5515 task->tk_status = 0;
a8a4ae3a
AA		 5516 /* fall through */
5517 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5518 rpc_restart_call_prepare(task);
2050f0cc
AA		 5519 return;
5520 }
2050f0cc
AA		 5521 dprintk("<-- %s\n", __func__);
5522}
5523
17280175 5524static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5525 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5526 .rpc_call_done = nfs4_get_lease_time_done,
5527};
5528
5529int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5530{
5531 struct rpc_task *task;
5532 struct nfs4_get_lease_time_args args;
5533 struct nfs4_get_lease_time_res res = {
5534 .lr_fsinfo = fsinfo,
5535 };
5536 struct nfs4_get_lease_time_data data = {
5537 .args = &args,
5538 .res = &res,
5539 .clp = clp,
5540 };
5541 struct rpc_message msg = {
5542 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5543 .rpc_argp = &args,
5544 .rpc_resp = &res,
5545 };
5546 struct rpc_task_setup task_setup = {
5547 .rpc_client = clp->cl_rpcclient,
5548 .rpc_message = &msg,
5549 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5550 .callback_data = &data,
5551 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5552 };
5553 int status;
5554
9d12b216 5555 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5556 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5557 dprintk("--> %s\n", __func__);
5558 task = rpc_run_task(&task_setup);
5559
5560 if (IS_ERR(task))
5561 status = PTR_ERR(task);
5562 else {
5563 status = task->tk_status;
5564 rpc_put_task(task);
5565 }
5566 dprintk("<-- %s return %d\n", __func__, status);
5567
5568 return status;
5569}
5570
fc931582
AA		 5571/*
5572 * Initialize the values to be used by the client in CREATE_SESSION
5573 * If nfs4_init_session set the fore channel request and response sizes,
5574 * use them.
5575 *
5576 * Set the back channel max_resp_sz_cached to zero to force the client to
5577 * always set csa_cachethis to FALSE because the current implementation
5578 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5579 */
5580static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5581{
5582 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5583 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5584 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5585
5586 if (mxrqst_sz == 0)
5587 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5588 if (mxresp_sz == 0)
5589 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5590 /* Fore channel attributes */
fc931582
AA		 5591 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5592 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5593 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5594 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5595
5596 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5597 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5598 __func__,
5599 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5600 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5601
5602 /* Back channel attributes */
fc931582
AA		 5603 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5604 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5605 args->bc_attrs.max_resp_sz_cached = 0;
5606 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5607 args->bc_attrs.max_reqs = 1;
5608
5609 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5610 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5611 __func__,
5612 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5613 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5614 args->bc_attrs.max_reqs);
5615}
5616
43c2e885 5617static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5618{
43c2e885
BF		 5619 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5620 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5621
43c2e885
BF		 5622 if (rcvd->max_resp_sz > sent->max_resp_sz)
5623 return -EINVAL;
5624 /*
5625 * Our requested max_ops is the minimum we need; we're not
5626 * prepared to break up compounds into smaller pieces than that.
5627 * So, no point even trying to continue if the server won't
5628 * cooperate:
5629 */
5630 if (rcvd->max_ops < sent->max_ops)
5631 return -EINVAL;
5632 if (rcvd->max_reqs == 0)
5633 return -EINVAL;
b4b9a0c1
VG		 5634 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5635 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5636 return 0;
8d35301d
AA		 5637}
5638
43c2e885
BF		 5639static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5640{
5641 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5642 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5643
43c2e885
BF		 5644 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5645 return -EINVAL;
5646 if (rcvd->max_resp_sz < sent->max_resp_sz)
5647 return -EINVAL;
5648 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5649 return -EINVAL;
5650 /* These would render the backchannel useless: */
b4b9a0c1 5651 if (rcvd->max_ops != sent->max_ops)
43c2e885 5652 return -EINVAL;
b4b9a0c1 5653 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5654 return -EINVAL;
5655 return 0;
5656}
8d35301d 5657
8d35301d
AA		 5658static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5659 struct nfs4_session *session)
5660{
43c2e885 5661 int ret;
8d35301d 5662
43c2e885
BF		 5663 ret = nfs4_verify_fore_channel_attrs(args, session);
5664 if (ret)
5665 return ret;
5666 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5667}
5668
848f5bda
TM		 5669static int _nfs4_proc_create_session(struct nfs_client *clp,
5670 struct rpc_cred *cred)
fc931582
AA		 5671{
5672 struct nfs4_session *session = clp->cl_session;
5673 struct nfs41_create_session_args args = {
5674 .client = clp,
5675 .cb_program = NFS4_CALLBACK,
5676 };
5677 struct nfs41_create_session_res res = {
5678 .client = clp,
5679 };
5680 struct rpc_message msg = {
5681 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5682 .rpc_argp = &args,
5683 .rpc_resp = &res,
848f5bda 5684 .rpc_cred = cred,
fc931582
AA		 5685 };
5686 int status;
5687
5688 nfs4_init_channel_attrs(&args);
0f91421e 5689 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5690
1bd714f2 5691 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5692
43095d39 5693 if (!status) {
8d35301d
AA		 5694 /* Verify the session's negotiated channel_attrs values */
5695 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5696 /* Increment the clientid slot sequence id */
5697 clp->cl_seqid++;
5698 }
5699
5700 return status;
5701}
5702
5703/*
5704 * Issues a CREATE_SESSION operation to the server.
5705 * It is the responsibility of the caller to verify the session is
5706 * expired before calling this routine.
5707 */
848f5bda 5708int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5709{
5710 int status;
5711 unsigned *ptr;
fc931582
AA		 5712 struct nfs4_session *session = clp->cl_session;
5713
5714 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5715
848f5bda 5716 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5717 if (status)
5718 goto out;
5719
aacd5537
AA		 5720 /* Init or reset the session slot tables */
5721 status = nfs4_setup_session_slot_tables(session);
5722 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5723 if (status)
5724 goto out;
5725
5726 ptr = (unsigned *)&session->sess_id.data[0];
5727 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5728 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5729out:
5730 dprintk("<-- %s\n", __func__);
5731 return status;
5732}
5733
0f3e66c6
AA		 5734/*
5735 * Issue the over-the-wire RPC DESTROY_SESSION.
5736 * The caller must serialize access to this routine.
5737 */
848f5bda
TM		 5738int nfs4_proc_destroy_session(struct nfs4_session *session,
5739 struct rpc_cred *cred)
0f3e66c6 5740{
848f5bda
TM		 5741 struct rpc_message msg = {
5742 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5743 .rpc_argp = session,
5744 .rpc_cred = cred,
5745 };
0f3e66c6 5746 int status = 0;
0f3e66c6
AA		 5747
5748 dprintk("--> nfs4_proc_destroy_session\n");
5749
5750 /* session is still being setup */
5751 if (session->clp->cl_cons_state != NFS_CS_READY)
5752 return status;
5753
1bd714f2 5754 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5755
5756 if (status)
08106ac7 5757 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5758 "Session has been destroyed regardless...\n", status);
5759
5760 dprintk("<-- nfs4_proc_destroy_session\n");
5761 return status;
5762}
5763
fc01cea9
AA		 5764/*
5765 * Renew the cl_session lease.
5766 */
d5f8d3fe
TM		 5767struct nfs4_sequence_data {
5768 struct nfs_client *clp;
5769 struct nfs4_sequence_args args;
5770 struct nfs4_sequence_res res;
5771};
5772
dc96aef9
AB		 5773static void nfs41_sequence_release(void *data)
5774{
d5f8d3fe
TM		 5775 struct nfs4_sequence_data *calldata = data;
5776 struct nfs_client *clp = calldata->clp;
dc96aef9 5777
7135840f
AB		 5778 if (atomic_read(&clp->cl_count) > 1)
5779 nfs4_schedule_state_renewal(clp);
5780 nfs_put_client(clp);
d5f8d3fe 5781 kfree(calldata);
dc96aef9
AB		 5782}
5783
aa5190d0
TM		 5784static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5785{
5786 switch(task->tk_status) {
5787 case -NFS4ERR_DELAY:
aa5190d0
TM		 5788 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5789 return -EAGAIN;
5790 default:
0400a6b0 5791 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5792 }
5793 return 0;
5794}
5795
dc96aef9 5796static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5797{
d5f8d3fe
TM		 5798 struct nfs4_sequence_data *calldata = data;
5799 struct nfs_client *clp = calldata->clp;
fc01cea9 5800
14516c3a
TM		 5801 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5802 return;
fc01cea9
AA		 5803
5804 if (task->tk_status < 0) {
5805 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5806 if (atomic_read(&clp->cl_count) == 1)
5807 goto out;
fc01cea9 5808
aa5190d0
TM		 5809 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5810 rpc_restart_call_prepare(task);
fc01cea9
AA		 5811 return;
5812 }
5813 }
fc01cea9 5814 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5815out:
fc01cea9
AA		 5816 dprintk("<-- %s\n", __func__);
5817}
5818
5819static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5820{
d5f8d3fe
TM		 5821 struct nfs4_sequence_data *calldata = data;
5822 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5823 struct nfs4_sequence_args *args;
5824 struct nfs4_sequence_res *res;
5825
fc01cea9
AA		 5826 args = task->tk_msg.rpc_argp;
5827 res = task->tk_msg.rpc_resp;
5828
d9afbd1b 5829 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 5830}
5831
5832static const struct rpc_call_ops nfs41_sequence_ops = {
5833 .rpc_call_done = nfs41_sequence_call_done,
5834 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5835 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5836};
5837
8fe72bac
TM		 5838static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
5839 struct rpc_cred *cred,
5840 bool is_privileged)
fc01cea9 5841{
d5f8d3fe 5842 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5843 struct rpc_message msg = {
5844 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5845 .rpc_cred = cred,
5846 };
71ac6da9
TM		 5847 struct rpc_task_setup task_setup_data = {
5848 .rpc_client = clp->cl_rpcclient,
5849 .rpc_message = &msg,
8fe72bac 5850 .callback_ops = &nfs41_sequence_ops,
71ac6da9
TM		 5851 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5852 };
fc01cea9 5853
7135840f 5854 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5855 return ERR_PTR(-EIO);
dfb4f309 5856 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5857 if (calldata == NULL) {
7135840f 5858 nfs_put_client(clp);
71ac6da9 5859 return ERR_PTR(-ENOMEM);
fc01cea9 5860 }
9d12b216 5861 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 5862 if (is_privileged)
5863 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 5864 msg.rpc_argp = &calldata->args;
5865 msg.rpc_resp = &calldata->res;
5866 calldata->clp = clp;
71ac6da9 5867 task_setup_data.callback_data = calldata;
fc01cea9 5868
71ac6da9
TM		 5869 return rpc_run_task(&task_setup_data);
5870}
5871
2f60ea6b 5872static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 5873{
5874 struct rpc_task *task;
5875 int ret = 0;
5876
2f60ea6b
TM		 5877 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5878 return 0;
8fe72bac 5879 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 5880 if (IS_ERR(task))
5881 ret = PTR_ERR(task);
5882 else
bf294b41 5883 rpc_put_task_async(task);
71ac6da9
TM		 5884 dprintk("<-- %s status=%d\n", __func__, ret);
5885 return ret;
5886}
5887
5888static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5889{
5890 struct rpc_task *task;
5891 int ret;
5892
8fe72bac 5893 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 5894 if (IS_ERR(task)) {
5895 ret = PTR_ERR(task);
5896 goto out;
5897 }
5898 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5899 if (!ret) {
5900 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5901
5902 if (task->tk_status == 0)
5903 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 5904 ret = task->tk_status;
b4410c2f 5905 }
71ac6da9
TM		 5906 rpc_put_task(task);
5907out:
5908 dprintk("<-- %s status=%d\n", __func__, ret);
5909 return ret;
fc01cea9
AA		 5910}
5911
fce5c838
RL		 5912struct nfs4_reclaim_complete_data {
5913 struct nfs_client *clp;
5914 struct nfs41_reclaim_complete_args arg;
5915 struct nfs41_reclaim_complete_res res;
5916};
5917
5918static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5919{
5920 struct nfs4_reclaim_complete_data *calldata = data;
5921
d9afbd1b
TM		 5922 nfs41_setup_sequence(calldata->clp->cl_session,
5923 &calldata->arg.seq_args,
5924 &calldata->res.seq_res,
5925 task);
fce5c838
RL		 5926}
5927
aa5190d0
TM		 5928static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5929{
5930 switch(task->tk_status) {
5931 case 0:
5932 case -NFS4ERR_COMPLETE_ALREADY:
5933 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5934 break;
5935 case -NFS4ERR_DELAY:
aa5190d0 5936 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 5937 /* fall through */
5938 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 5939 return -EAGAIN;
5940 default:
0400a6b0 5941 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5942 }
5943 return 0;
5944}
5945
fce5c838
RL		 5946static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5947{
5948 struct nfs4_reclaim_complete_data *calldata = data;
5949 struct nfs_client *clp = calldata->clp;
5950 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5951
5952 dprintk("--> %s\n", __func__);
14516c3a
TM		 5953 if (!nfs41_sequence_done(task, res))
5954 return;
fce5c838 5955
aa5190d0
TM		 5956 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5957 rpc_restart_call_prepare(task);
5958 return;
5959 }
fce5c838
RL		 5960 dprintk("<-- %s\n", __func__);
5961}
5962
5963static void nfs4_free_reclaim_complete_data(void *data)
5964{
5965 struct nfs4_reclaim_complete_data *calldata = data;
5966
5967 kfree(calldata);
5968}
5969
5970static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5971 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5972 .rpc_call_done = nfs4_reclaim_complete_done,
5973 .rpc_release = nfs4_free_reclaim_complete_data,
5974};
5975
5976/*
5977 * Issue a global reclaim complete.
5978 */
5979static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5980{
5981 struct nfs4_reclaim_complete_data *calldata;
5982 struct rpc_task *task;
5983 struct rpc_message msg = {
5984 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5985 };
5986 struct rpc_task_setup task_setup_data = {
5987 .rpc_client = clp->cl_rpcclient,
5988 .rpc_message = &msg,
5989 .callback_ops = &nfs4_reclaim_complete_call_ops,
5990 .flags = RPC_TASK_ASYNC,
5991 };
5992 int status = -ENOMEM;
5993
5994 dprintk("--> %s\n", __func__);
8535b2be 5995 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5996 if (calldata == NULL)
5997 goto out;
5998 calldata->clp = clp;
5999 calldata->arg.one_fs = 0;
fce5c838 6000
9d12b216 6001 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6002 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6003 msg.rpc_argp = &calldata->arg;
6004 msg.rpc_resp = &calldata->res;
6005 task_setup_data.callback_data = calldata;
6006 task = rpc_run_task(&task_setup_data);
acf82b85 6007 if (IS_ERR(task)) {
fce5c838 6008 status = PTR_ERR(task);
acf82b85
DC		 6009 goto out;
6010 }
c34c32ea
AA		 6011 status = nfs4_wait_for_completion_rpc_task(task);
6012 if (status == 0)
6013 status = task->tk_status;
fce5c838 6014 rpc_put_task(task);
acf82b85 6015 return 0;
fce5c838
RL		 6016out:
6017 dprintk("<-- %s status=%d\n", __func__, status);
6018 return status;
6019}
b1f69b75
AA		 6020
6021static void
6022nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6023{
6024 struct nfs4_layoutget *lgp = calldata;
c31663d4 6025 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6026 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6027
6028 dprintk("--> %s\n", __func__);
c31663d4
FI		 6029 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6030 * right now covering the LAYOUTGET we are about to send.
6031 * However, that is not so catastrophic, and there seems
6032 * to be no way to prevent it completely.
6033 */
6ba7db34 6034 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6035 &lgp->res.seq_res, task))
b1f69b75 6036 return;
cf7d63f1
FI		 6037 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6038 NFS_I(lgp->args.inode)->layout,
6039 lgp->args.ctx->state)) {
6040 rpc_exit(task, NFS4_OK);
cf7d63f1 6041 }
b1f69b75
AA		 6042}
6043
6044static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6045{
6046 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6047 struct inode *inode = lgp->args.inode;
6048 struct nfs_server *server = NFS_SERVER(inode);
6049 struct pnfs_layout_hdr *lo;
6050 struct nfs4_state *state = NULL;
30005121 6051 unsigned long timeo, giveup;
b1f69b75
AA		 6052
6053 dprintk("--> %s\n", __func__);
6054
6ba7db34 6055 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6056 goto out;
b1f69b75
AA		 6057
6058 switch (task->tk_status) {
6059 case 0:
ee314c2a 6060 goto out;
b1f69b75
AA		 6061 case -NFS4ERR_LAYOUTTRYLATER:
6062 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6063 timeo = rpc_get_timeout(task->tk_client);
6064 giveup = lgp->args.timestamp + timeo;
6065 if (time_after(giveup, jiffies))
6066 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6067 break;
6068 case -NFS4ERR_EXPIRED:
6069 case -NFS4ERR_BAD_STATEID:
6070 spin_lock(&inode->i_lock);
6071 lo = NFS_I(inode)->layout;
6072 if (!lo || list_empty(&lo->plh_segs)) {
6073 spin_unlock(&inode->i_lock);
6074 /* If the open stateid was bad, then recover it. */
6075 state = lgp->args.ctx->state;
6076 } else {
6077 LIST_HEAD(head);
6078
6079 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6080 spin_unlock(&inode->i_lock);
6081 /* Mark the bad layout state as invalid, then
6082 * retry using the open stateid. */
6083 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6084 }
6085 }
ee314c2a
TM		 6086 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6087 rpc_restart_call_prepare(task);
6088out:
b1f69b75
AA		 6089 dprintk("<-- %s\n", __func__);
6090}
6091
8554116e
IK		 6092static size_t max_response_pages(struct nfs_server *server)
6093{
6094 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6095 return nfs_page_array_len(0, max_resp_sz);
6096}
6097
6098static void nfs4_free_pages(struct page **pages, size_t size)
6099{
6100 int i;
6101
6102 if (!pages)
6103 return;
6104
6105 for (i = 0; i < size; i++) {
6106 if (!pages[i])
6107 break;
6108 __free_page(pages[i]);
6109 }
6110 kfree(pages);
6111}
6112
6113static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6114{
6115 struct page **pages;
6116 int i;
6117
6118 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6119 if (!pages) {
6120 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6121 return NULL;
6122 }
6123
6124 for (i = 0; i < size; i++) {
6125 pages[i] = alloc_page(gfp_flags);
6126 if (!pages[i]) {
6127 dprintk("%s: failed to allocate page\n", __func__);
6128 nfs4_free_pages(pages, size);
6129 return NULL;
6130 }
6131 }
6132
6133 return pages;
6134}
6135
b1f69b75
AA		 6136static void nfs4_layoutget_release(void *calldata)
6137{
6138 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6139 struct inode *inode = lgp->args.inode;
6140 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6141 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6142
6143 dprintk("--> %s\n", __func__);
8554116e 6144 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6145 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6146 put_nfs_open_context(lgp->args.ctx);
6147 kfree(calldata);
6148 dprintk("<-- %s\n", __func__);
6149}
6150
6151static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6152 .rpc_call_prepare = nfs4_layoutget_prepare,
6153 .rpc_call_done = nfs4_layoutget_done,
6154 .rpc_release = nfs4_layoutget_release,
6155};
6156
a0b0a6e3
TM		 6157struct pnfs_layout_segment *
6158nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6159{
a47970ff
WAA		 6160 struct inode *inode = lgp->args.inode;
6161 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6162 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6163 struct rpc_task *task;
6164 struct rpc_message msg = {
6165 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6166 .rpc_argp = &lgp->args,
6167 .rpc_resp = &lgp->res,
6168 };
6169 struct rpc_task_setup task_setup_data = {
6170 .rpc_client = server->client,
6171 .rpc_message = &msg,
6172 .callback_ops = &nfs4_layoutget_call_ops,
6173 .callback_data = lgp,
6174 .flags = RPC_TASK_ASYNC,
6175 };
a0b0a6e3 6176 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6177 int status = 0;
6178
6179 dprintk("--> %s\n", __func__);
6180
8554116e
IK		 6181 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6182 if (!lgp->args.layout.pages) {
6183 nfs4_layoutget_release(lgp);
a0b0a6e3 6184 return ERR_PTR(-ENOMEM);
8554116e
IK		 6185 }
6186 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6187 lgp->args.timestamp = jiffies;
8554116e 6188
35124a09 6189 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6190 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6191 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6192
6193 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6194 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6195
b1f69b75
AA		 6196 task = rpc_run_task(&task_setup_data);
6197 if (IS_ERR(task))
a0b0a6e3 6198 return ERR_CAST(task);
b1f69b75 6199 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6200 if (status == 0)
6201 status = task->tk_status;
085b7a45
WAA		 6202 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6203 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6204 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6205 rpc_put_task(task);
6206 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6207 if (status)
6208 return ERR_PTR(status);
6209 return lseg;
b1f69b75
AA		 6210}
6211
cbe82603
BH		 6212static void
6213nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6214{
6215 struct nfs4_layoutreturn *lrp = calldata;
6216
6217 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6218 nfs41_setup_sequence(lrp->clp->cl_session,
6219 &lrp->args.seq_args,
6220 &lrp->res.seq_res,
6221 task);
cbe82603
BH		 6222}
6223
6224static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6225{
6226 struct nfs4_layoutreturn *lrp = calldata;
6227 struct nfs_server *server;
6228
6229 dprintk("--> %s\n", __func__);
6230
6ba7db34 6231 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6232 return;
6233
6234 server = NFS_SERVER(lrp->args.inode);
6235 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6236 rpc_restart_call_prepare(task);
cbe82603
BH		 6237 return;
6238 }
cbe82603
BH		 6239 dprintk("<-- %s\n", __func__);
6240}
6241
6242static void nfs4_layoutreturn_release(void *calldata)
6243{
6244 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6245 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6246
6247 dprintk("--> %s\n", __func__);
849b286f
TM		 6248 spin_lock(&lo->plh_inode->i_lock);
6249 if (lrp->res.lrs_present)
6250 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6251 lo->plh_block_lgets--;
6252 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6253 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6254 kfree(calldata);
6255 dprintk("<-- %s\n", __func__);
6256}
6257
6258static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6259 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6260 .rpc_call_done = nfs4_layoutreturn_done,
6261 .rpc_release = nfs4_layoutreturn_release,
6262};
6263
6264int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6265{
6266 struct rpc_task *task;
6267 struct rpc_message msg = {
6268 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6269 .rpc_argp = &lrp->args,
6270 .rpc_resp = &lrp->res,
6271 };
6272 struct rpc_task_setup task_setup_data = {
6273 .rpc_client = lrp->clp->cl_rpcclient,
6274 .rpc_message = &msg,
6275 .callback_ops = &nfs4_layoutreturn_call_ops,
6276 .callback_data = lrp,
6277 };
6278 int status;
6279
6280 dprintk("--> %s\n", __func__);
9d12b216 6281 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6282 task = rpc_run_task(&task_setup_data);
6283 if (IS_ERR(task))
6284 return PTR_ERR(task);
6285 status = task->tk_status;
6286 dprintk("<-- %s status=%d\n", __func__, status);
6287 rpc_put_task(task);
6288 return status;
6289}
6290
7f11d8d3
AA		 6291/*
6292 * Retrieve the list of Data Server devices from the MDS.
6293 */
6294static int _nfs4_getdevicelist(struct nfs_server *server,
6295 const struct nfs_fh *fh,
6296 struct pnfs_devicelist *devlist)
6297{
6298 struct nfs4_getdevicelist_args args = {
6299 .fh = fh,
6300 .layoutclass = server->pnfs_curr_ld->id,
6301 };
6302 struct nfs4_getdevicelist_res res = {
6303 .devlist = devlist,
6304 };
6305 struct rpc_message msg = {
6306 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6307 .rpc_argp = &args,
6308 .rpc_resp = &res,
6309 };
6310 int status;
6311
6312 dprintk("--> %s\n", __func__);
6313 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6314 &res.seq_res, 0);
6315 dprintk("<-- %s status=%d\n", __func__, status);
6316 return status;
6317}
6318
6319int nfs4_proc_getdevicelist(struct nfs_server *server,
6320 const struct nfs_fh *fh,
6321 struct pnfs_devicelist *devlist)
6322{
6323 struct nfs4_exception exception = { };
6324 int err;
6325
6326 do {
6327 err = nfs4_handle_exception(server,
6328 _nfs4_getdevicelist(server, fh, devlist),
6329 &exception);
6330 } while (exception.retry);
6331
6332 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6333 err, devlist->num_devs);
6334
6335 return err;
6336}
6337EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6338
b1f69b75
AA		 6339static int
6340_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6341{
6342 struct nfs4_getdeviceinfo_args args = {
6343 .pdev = pdev,
6344 };
6345 struct nfs4_getdeviceinfo_res res = {
6346 .pdev = pdev,
6347 };
6348 struct rpc_message msg = {
6349 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6350 .rpc_argp = &args,
6351 .rpc_resp = &res,
6352 };
6353 int status;
6354
6355 dprintk("--> %s\n", __func__);
7c513058 6356 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6357 dprintk("<-- %s status=%d\n", __func__, status);
6358
6359 return status;
6360}
6361
6362int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6363{
6364 struct nfs4_exception exception = { };
6365 int err;
6366
6367 do {
6368 err = nfs4_handle_exception(server,
6369 _nfs4_proc_getdeviceinfo(server, pdev),
6370 &exception);
6371 } while (exception.retry);
6372 return err;
6373}
6374EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6375
863a3c6c
AA		 6376static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6377{
6378 struct nfs4_layoutcommit_data *data = calldata;
6379 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6380 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6381
d9afbd1b
TM		 6382 nfs41_setup_sequence(session,
6383 &data->args.seq_args,
6384 &data->res.seq_res,
6385 task);
863a3c6c
AA		 6386}
6387
6388static void
6389nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6390{
6391 struct nfs4_layoutcommit_data *data = calldata;
6392 struct nfs_server *server = NFS_SERVER(data->args.inode);
6393
6ba7db34 6394 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6395 return;
6396
6397 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6398 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6399 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6400 case -NFS4ERR_BADLAYOUT: /* no layout */
6401 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6402 task->tk_status = 0;
e59d27e0
TM		 6403 break;
6404 case 0:
863a3c6c
AA		 6405 nfs_post_op_update_inode_force_wcc(data->args.inode,
6406 data->res.fattr);
e59d27e0
TM		 6407 break;
6408 default:
6409 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6410 rpc_restart_call_prepare(task);
6411 return;
6412 }
6413 }
863a3c6c
AA		 6414}
6415
6416static void nfs4_layoutcommit_release(void *calldata)
6417{
6418 struct nfs4_layoutcommit_data *data = calldata;
6419
db29c089 6420 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 6421 put_rpccred(data->cred);
6422 kfree(data);
6423}
6424
6425static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6426 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6427 .rpc_call_done = nfs4_layoutcommit_done,
6428 .rpc_release = nfs4_layoutcommit_release,
6429};
6430
6431int
ef311537 6432nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6433{
6434 struct rpc_message msg = {
6435 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6436 .rpc_argp = &data->args,
6437 .rpc_resp = &data->res,
6438 .rpc_cred = data->cred,
6439 };
6440 struct rpc_task_setup task_setup_data = {
6441 .task = &data->task,
6442 .rpc_client = NFS_CLIENT(data->args.inode),
6443 .rpc_message = &msg,
6444 .callback_ops = &nfs4_layoutcommit_ops,
6445 .callback_data = data,
6446 .flags = RPC_TASK_ASYNC,
6447 };
6448 struct rpc_task *task;
6449 int status = 0;
6450
6451 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6452 "lbw: %llu inode %lu\n",
6453 data->task.tk_pid, sync,
6454 data->args.lastbytewritten,
6455 data->args.inode->i_ino);
6456
9d12b216 6457 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6458 task = rpc_run_task(&task_setup_data);
6459 if (IS_ERR(task))
6460 return PTR_ERR(task);
ef311537 6461 if (sync == false)
863a3c6c
AA		 6462 goto out;
6463 status = nfs4_wait_for_completion_rpc_task(task);
6464 if (status != 0)
6465 goto out;
6466 status = task->tk_status;
6467out:
6468 dprintk("%s: status %d\n", __func__, status);
6469 rpc_put_task(task);
6470 return status;
6471}
fca78d6d
BS		 6472
6473static int
6474_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6475 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6476{
6477 struct nfs41_secinfo_no_name_args args = {
6478 .style = SECINFO_STYLE_CURRENT_FH,
6479 };
6480 struct nfs4_secinfo_res res = {
6481 .flavors = flavors,
6482 };
6483 struct rpc_message msg = {
6484 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6485 .rpc_argp = &args,
6486 .rpc_resp = &res,
6487 };
6488 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6489}
6490
6491static int
6492nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6493 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6494{
6495 struct nfs4_exception exception = { };
6496 int err;
6497 do {
6498 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6499 switch (err) {
6500 case 0:
6501 case -NFS4ERR_WRONGSEC:
6502 case -NFS4ERR_NOTSUPP:
05e9cfb4 6503 goto out;
fca78d6d
BS		 6504 default:
6505 err = nfs4_handle_exception(server, err, &exception);
6506 }
6507 } while (exception.retry);
05e9cfb4 6508out:
fca78d6d
BS		 6509 return err;
6510}
6511
6512static int
6513nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6514 struct nfs_fsinfo *info)
6515{
6516 int err;
6517 struct page *page;
6518 rpc_authflavor_t flavor;
6519 struct nfs4_secinfo_flavors *flavors;
6520
6521 page = alloc_page(GFP_KERNEL);
6522 if (!page) {
6523 err = -ENOMEM;
6524 goto out;
6525 }
6526
6527 flavors = page_address(page);
6528 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6529
6530 /*
6531 * Fall back on "guess and check" method if
6532 * the server doesn't support SECINFO_NO_NAME
6533 */
6534 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6535 err = nfs4_find_root_sec(server, fhandle, info);
6536 goto out_freepage;
6537 }
6538 if (err)
6539 goto out_freepage;
6540
6541 flavor = nfs_find_best_sec(flavors);
6542 if (err == 0)
6543 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6544
6545out_freepage:
6546 put_page(page);
6547 if (err == -EACCES)
6548 return -EPERM;
6549out:
6550 return err;
6551}
1cab0652
BS		 6552
6553static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6554{
6555 int status;
6556 struct nfs41_test_stateid_args args = {
1cab0652 6557 .stateid = stateid,
7d974794
BS		 6558 };
6559 struct nfs41_test_stateid_res res;
6560 struct rpc_message msg = {
6561 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6562 .rpc_argp = &args,
6563 .rpc_resp = &res,
6564 };
1cab0652 6565
38527b15 6566 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6567 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6568 nfs4_set_sequence_privileged(&args.seq_args);
6569 status = nfs4_call_sync_sequence(server->client, server, &msg,
6570 &args.seq_args, &res.seq_res);
38527b15
CL		 6571 if (status != NFS_OK) {
6572 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6573 return status;
38527b15
CL		 6574 }
6575 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6576 return -res.status;
7d974794
BS		 6577}
6578
38527b15
CL		 6579/**
6580 * nfs41_test_stateid - perform a TEST_STATEID operation
6581 *
6582 * @server: server / transport on which to perform the operation
6583 * @stateid: state ID to test
6584 *
6585 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6586 * Otherwise a negative NFS4ERR value is returned if the operation
6587 * failed or the state ID is not currently valid.
6588 */
1cab0652 6589static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6590{
6591 struct nfs4_exception exception = { };
6592 int err;
6593 do {
377e507d
CL		 6594 err = _nfs41_test_stateid(server, stateid);
6595 if (err != -NFS4ERR_DELAY)
6596 break;
6597 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6598 } while (exception.retry);
6599 return err;
6600}
9aeda35f 6601
1cab0652 6602static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6603{
9aeda35f 6604 struct nfs41_free_stateid_args args = {
1cab0652 6605 .stateid = stateid,
9aeda35f
BS		 6606 };
6607 struct nfs41_free_stateid_res res;
6608 struct rpc_message msg = {
6609 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6610 .rpc_argp = &args,
6611 .rpc_resp = &res,
6612 };
38527b15 6613 int status;
9aeda35f 6614
38527b15 6615 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6616 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 6617 nfs4_set_sequence_privileged(&args.seq_args);
38527b15 6618 status = nfs4_call_sync_sequence(server->client, server, &msg,
8fe72bac 6619 &args.seq_args, &res.seq_res);
38527b15
CL		 6620 dprintk("NFS reply free_stateid: %d\n", status);
6621 return status;
9aeda35f
BS		 6622}
6623
38527b15
CL		 6624/**
6625 * nfs41_free_stateid - perform a FREE_STATEID operation
6626 *
6627 * @server: server / transport on which to perform the operation
6628 * @stateid: state ID to release
6629 *
6630 * Returns NFS_OK if the server freed "stateid". Otherwise a
6631 * negative NFS4ERR value is returned.
6632 */
1cab0652 6633static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6634{
6635 struct nfs4_exception exception = { };
6636 int err;
6637 do {
377e507d
CL		 6638 err = _nfs4_free_stateid(server, stateid);
6639 if (err != -NFS4ERR_DELAY)
6640 break;
6641 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6642 } while (exception.retry);
6643 return err;
6644}
36281caa
TM		 6645
6646static bool nfs41_match_stateid(const nfs4_stateid *s1,
6647 const nfs4_stateid *s2)
6648{
2d2f24ad 6649 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6650 return false;
6651
2d2f24ad 6652 if (s1->seqid == s2->seqid)
36281caa 6653 return true;
2d2f24ad 6654 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6655 return true;
6656
6657 return false;
6658}
6659
557134a3
AA		 6660#endif /* CONFIG_NFS_V4_1 */
6661
36281caa
TM		 6662static bool nfs4_match_stateid(const nfs4_stateid *s1,
6663 const nfs4_stateid *s2)
6664{
f597c537 6665 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6666}
6667
6668
17280175 6669static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6670 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6671 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6672 .recover_open = nfs4_open_reclaim,
6673 .recover_lock = nfs4_lock_reclaim,
591d71cb 6674 .establish_clid = nfs4_init_clientid,
90a16617 6675 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6676 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6677};
6678
591d71cb 6679#if defined(CONFIG_NFS_V4_1)
17280175 6680static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6681 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6682 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6683 .recover_open = nfs4_open_reclaim,
6684 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6685 .establish_clid = nfs41_init_clientid,
b4b82607 6686 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6687 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6688 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6689};
6690#endif /* CONFIG_NFS_V4_1 */
6691
17280175 6692static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6693 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6694 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6695 .recover_open = nfs4_open_expired,
6696 .recover_lock = nfs4_lock_expired,
6697 .establish_clid = nfs4_init_clientid,
90a16617 6698 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6699};
6700
6701#if defined(CONFIG_NFS_V4_1)
17280175 6702static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6703 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6704 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6705 .recover_open = nfs41_open_expired,
6706 .recover_lock = nfs41_lock_expired,
4d643d1d 6707 .establish_clid = nfs41_init_clientid,
b4b82607 6708 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6709};
591d71cb 6710#endif /* CONFIG_NFS_V4_1 */
1da177e4 6711
17280175 6712static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6713 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6714 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6715 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6716};
6717
6718#if defined(CONFIG_NFS_V4_1)
17280175 6719static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6720 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6721 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6722 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6723};
6724#endif
6725
97dc1359
TM		 6726static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6727 .minor_version = 0,
6728 .call_sync = _nfs4_call_sync,
36281caa 6729 .match_stateid = nfs4_match_stateid,
fca78d6d 6730 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6731 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6732 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6733 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6734};
6735
6736#if defined(CONFIG_NFS_V4_1)
6737static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6738 .minor_version = 1,
104287cd 6739 .call_sync = nfs4_call_sync_sequence,
36281caa 6740 .match_stateid = nfs41_match_stateid,
fca78d6d 6741 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6742 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6743 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6744 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6745};
6746#endif
6747
97dc1359
TM		 6748const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6749 [0] = &nfs_v4_0_minor_ops,
6750#if defined(CONFIG_NFS_V4_1)
6751 [1] = &nfs_v4_1_minor_ops,
6752#endif
6753};
6754
73a79706
BS		 6755const struct inode_operations nfs4_dir_inode_operations = {
6756 .create = nfs_create,
6757 .lookup = nfs_lookup,
6758 .atomic_open = nfs_atomic_open,
6759 .link = nfs_link,
6760 .unlink = nfs_unlink,
6761 .symlink = nfs_symlink,
6762 .mkdir = nfs_mkdir,
6763 .rmdir = nfs_rmdir,
6764 .mknod = nfs_mknod,
6765 .rename = nfs_rename,
6766 .permission = nfs_permission,
6767 .getattr = nfs_getattr,
6768 .setattr = nfs_setattr,
6769 .getxattr = generic_getxattr,
6770 .setxattr = generic_setxattr,
6771 .listxattr = generic_listxattr,
6772 .removexattr = generic_removexattr,
6773};
6774
92e1d5be 6775static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6776 .permission = nfs_permission,
6777 .getattr = nfs_getattr,
6778 .setattr = nfs_setattr,
64c2ce8b
AK		 6779 .getxattr = generic_getxattr,
6780 .setxattr = generic_setxattr,
6781 .listxattr = generic_listxattr,
6782 .removexattr = generic_removexattr,
6b3b5496
BF		 6783};
6784
509de811 6785const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6786 .version = 4, /* protocol version */
6787 .dentry_ops = &nfs4_dentry_operations,
6788 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6789 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6790 .file_ops = &nfs4_file_operations,
1da177e4 6791 .getroot = nfs4_proc_get_root,
281cad46 6792 .submount = nfs4_submount,
ff9099f2 6793 .try_mount = nfs4_try_mount,
1da177e4
LT		 6794 .getattr = nfs4_proc_getattr,
6795 .setattr = nfs4_proc_setattr,
6796 .lookup = nfs4_proc_lookup,
6797 .access = nfs4_proc_access,
6798 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6799 .create = nfs4_proc_create,
6800 .remove = nfs4_proc_remove,
6801 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6802 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6803 .unlink_done = nfs4_proc_unlink_done,
6804 .rename = nfs4_proc_rename,
d3d4152a 6805 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6806 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6807 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6808 .link = nfs4_proc_link,
6809 .symlink = nfs4_proc_symlink,
6810 .mkdir = nfs4_proc_mkdir,
6811 .rmdir = nfs4_proc_remove,
6812 .readdir = nfs4_proc_readdir,
6813 .mknod = nfs4_proc_mknod,
6814 .statfs = nfs4_proc_statfs,
6815 .fsinfo = nfs4_proc_fsinfo,
6816 .pathconf = nfs4_proc_pathconf,
e9326dca 6817 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6818 .decode_dirent = nfs4_decode_dirent,
6819 .read_setup = nfs4_proc_read_setup,
1abb5088 6820 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 6821 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6822 .read_done = nfs4_read_done,
1da177e4 6823 .write_setup = nfs4_proc_write_setup,
57208fa7 6824 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 6825 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6826 .write_done = nfs4_write_done,
1da177e4 6827 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 6828 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 6829 .commit_done = nfs4_commit_done,
1da177e4 6830 .lock = nfs4_proc_lock,
e50a1c2e 6831 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6832 .close_context = nfs4_close_context,
2b484297 6833 .open_context = nfs4_atomic_open,
011e2a7f 6834 .have_delegation = nfs4_have_delegation,
57ec14c5 6835 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 6836 .alloc_client = nfs4_alloc_client,
45a52a02 6837 .init_client = nfs4_init_client,
cdb7eced 6838 .free_client = nfs4_free_client,
1179acc6
BS		 6839 .create_server = nfs4_create_server,
6840 .clone_server = nfs_clone_server,
1da177e4
LT		 6841};
6842
64c2ce8b
AK		 6843static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6844 .prefix = XATTR_NAME_NFSV4_ACL,
6845 .list = nfs4_xattr_list_nfs4_acl,
6846 .get = nfs4_xattr_get_nfs4_acl,
6847 .set = nfs4_xattr_set_nfs4_acl,
6848};
6849
6850const struct xattr_handler *nfs4_xattr_handlers[] = {
6851 &nfs4_xattr_nfs4_acl_handler,
6852 NULL
6853};
6854
1da177e4
LT		 6855/*
6856 * Local variables:
6857 * c-basic-offset: 8
6858 * End:
6859 */
kernel source for telekom puls (alcatel/mediatek)