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Merge branch 'acpi-lpss'
[deliverable/linux.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();
fa332941 1049 nfs_release_seqid(opendata->o_arg.seqid);
af22f94a 1050 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1051 if (ret != 0)
1052 goto out;
1053 ret = -EAGAIN;
34310430
TM		 1054
1055 /* Try to update the stateid using the delegation */
dc0b027d 1056 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1057 goto out_return_state;
aac00a8d 1058 }
aac00a8d
TM		 1059out:
1060 return ERR_PTR(ret);
1061out_return_state:
1062 atomic_inc(&state->count);
1063 return state;
1064}
1065
e23008ec
AA		 1066static void
1067nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1068{
1069 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1070 struct nfs_delegation *delegation;
1071 int delegation_flags = 0;
1072
1073 rcu_read_lock();
1074 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1075 if (delegation)
1076 delegation_flags = delegation->flags;
1077 rcu_read_unlock();
1078 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1079 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1080 "returning a delegation for "
1081 "OPEN(CLAIM_DELEGATE_CUR)\n",
1082 clp->cl_hostname);
1083 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1084 nfs_inode_set_delegation(state->inode,
1085 data->owner->so_cred,
1086 &data->o_res);
1087 else
1088 nfs_inode_reclaim_delegation(state->inode,
1089 data->owner->so_cred,
1090 &data->o_res);
1091}
1092
1093/*
1094 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1095 * and update the nfs4_state.
1096 */
1097static struct nfs4_state *
1098_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1099{
1100 struct inode *inode = data->state->inode;
1101 struct nfs4_state *state = data->state;
1102 int ret;
1103
1104 if (!data->rpc_done) {
1105 ret = data->rpc_status;
1106 goto err;
1107 }
1108
1109 ret = -ESTALE;
1110 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1111 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1112 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1113 goto err;
1114
1115 ret = -ENOMEM;
1116 state = nfs4_get_open_state(inode, data->owner);
1117 if (state == NULL)
1118 goto err;
1119
1120 ret = nfs_refresh_inode(inode, &data->f_attr);
1121 if (ret)
1122 goto err;
1123
1124 if (data->o_res.delegation_type != 0)
1125 nfs4_opendata_check_deleg(data, state);
1126 update_open_stateid(state, &data->o_res.stateid, NULL,
1127 data->o_arg.fmode);
1128
1129 return state;
1130err:
1131 return ERR_PTR(ret);
1132
1133}
1134
1135static struct nfs4_state *
1136_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1137{
1138 struct inode *inode;
1139 struct nfs4_state *state = NULL;
1b370bc2 1140 int ret;
24ac23ab 1141
aac00a8d 1142 if (!data->rpc_done) {
6ee41268 1143 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1144 goto out;
1145 }
1146
1b370bc2 1147 ret = -EAGAIN;
24ac23ab 1148 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1149 goto err;
24ac23ab 1150 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1151 ret = PTR_ERR(inode);
03f28e3a 1152 if (IS_ERR(inode))
1b370bc2
TM		 1153 goto err;
1154 ret = -ENOMEM;
24ac23ab
TM		 1155 state = nfs4_get_open_state(inode, data->owner);
1156 if (state == NULL)
1b370bc2 1157 goto err_put_inode;
e23008ec
AA		 1158 if (data->o_res.delegation_type != 0)
1159 nfs4_opendata_check_deleg(data, state);
34310430 1160 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1161 data->o_arg.fmode);
24ac23ab 1162 iput(inode);
aac00a8d 1163out:
7aa262b5 1164 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1165 return state;
1b370bc2
TM		 1166err_put_inode:
1167 iput(inode);
1168err:
1169 return ERR_PTR(ret);
24ac23ab
TM		 1170}
1171
e23008ec
AA		 1172static struct nfs4_state *
1173nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1174{
1175 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1176 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1177 return _nfs4_opendata_to_nfs4_state(data);
1178}
1179
864472e9
TM		 1180static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1181{
1182 struct nfs_inode *nfsi = NFS_I(state->inode);
1183 struct nfs_open_context *ctx;
1184
1185 spin_lock(&state->inode->i_lock);
1186 list_for_each_entry(ctx, &nfsi->open_files, list) {
1187 if (ctx->state != state)
1188 continue;
1189 get_nfs_open_context(ctx);
1190 spin_unlock(&state->inode->i_lock);
1191 return ctx;
1192 }
1193 spin_unlock(&state->inode->i_lock);
1194 return ERR_PTR(-ENOENT);
1195}
1196
6f220ed5
TM		 1197static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1198{
1199 struct nfs4_opendata *opendata;
1200
3d4ff43d 1201 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1202 if (opendata == NULL)
1203 return ERR_PTR(-ENOMEM);
1204 opendata->state = state;
1205 atomic_inc(&state->count);
1206 return opendata;
1207}
1208
dc0b027d 1209static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1210{
2ced46c2 1211 struct nfs4_state *newstate;
864472e9
TM		 1212 int ret;
1213
dc0b027d
TM		 1214 opendata->o_arg.open_flags = 0;
1215 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1216 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1217 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1218 nfs4_init_opendata_res(opendata);
b257957e 1219 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1220 if (ret != 0)
1221 return ret;
2ced46c2 1222 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1223 if (IS_ERR(newstate))
1224 return PTR_ERR(newstate);
643168c2 1225 nfs4_close_state(newstate, fmode);
2ced46c2 1226 *res = newstate;
864472e9
TM		 1227 return 0;
1228}
1229
1230static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1231{
864472e9 1232 struct nfs4_state *newstate;
864472e9
TM		 1233 int ret;
1234
1235 /* memory barrier prior to reading state->n_* */
2ced46c2 1236 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1237 smp_rmb();
1238 if (state->n_rdwr != 0) {
b0ed9dbc 1239 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1240 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1241 if (ret != 0)
1242 return ret;
2ced46c2
TM		 1243 if (newstate != state)
1244 return -ESTALE;
864472e9
TM		 1245 }
1246 if (state->n_wronly != 0) {
b0ed9dbc 1247 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1248 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1249 if (ret != 0)
1250 return ret;
2ced46c2
TM		 1251 if (newstate != state)
1252 return -ESTALE;
864472e9
TM		 1253 }
1254 if (state->n_rdonly != 0) {
b0ed9dbc 1255 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1256 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1257 if (ret != 0)
1258 return ret;
2ced46c2
TM		 1259 if (newstate != state)
1260 return -ESTALE;
864472e9 1261 }
1ac7e2fd
TM		 1262 /*
1263 * We may have performed cached opens for all three recoveries.
1264 * Check if we need to update the current stateid.
1265 */
1266 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1267 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1268 write_seqlock(&state->seqlock);
1ac7e2fd 1269 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1270 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1271 write_sequnlock(&state->seqlock);
1ac7e2fd 1272 }
864472e9
TM		 1273 return 0;
1274}
1275
1da177e4
LT		 1276/*
1277 * OPEN_RECLAIM:
1278 * reclaim state on the server after a reboot.
1da177e4 1279 */
539cd03a 1280static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1281{
1ac7e2fd 1282 struct nfs_delegation *delegation;
864472e9 1283 struct nfs4_opendata *opendata;
dc0b027d 1284 fmode_t delegation_type = 0;
1da177e4
LT		 1285 int status;
1286
6f220ed5
TM		 1287 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1288 if (IS_ERR(opendata))
1289 return PTR_ERR(opendata);
864472e9
TM		 1290 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1291 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1292 rcu_read_lock();
1293 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1294 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1295 delegation_type = delegation->type;
1ac7e2fd 1296 rcu_read_unlock();
864472e9
TM		 1297 opendata->o_arg.u.delegation_type = delegation_type;
1298 status = nfs4_open_recover(opendata, state);
c6d00e63 1299 nfs4_opendata_put(opendata);
1da177e4
LT		 1300 return status;
1301}
1302
539cd03a 1303static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1304{
1305 struct nfs_server *server = NFS_SERVER(state->inode);
1306 struct nfs4_exception exception = { };
1307 int err;
1308 do {
539cd03a 1309 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1310 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1311 break;
1312 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1313 } while (exception.retry);
1314 return err;
1315}
1316
864472e9
TM		 1317static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1318{
1319 struct nfs_open_context *ctx;
1320 int ret;
1321
1322 ctx = nfs4_state_find_open_context(state);
1323 if (IS_ERR(ctx))
1324 return PTR_ERR(ctx);
539cd03a 1325 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1326 put_nfs_open_context(ctx);
1327 return ret;
1328}
1329
13437e12 1330static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1331{
e56e0b78 1332 struct nfs4_opendata *opendata;
864472e9 1333 int ret;
1da177e4 1334
6f220ed5
TM		 1335 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1336 if (IS_ERR(opendata))
1337 return PTR_ERR(opendata);
e56e0b78 1338 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
f597c537 1339 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
864472e9 1340 ret = nfs4_open_recover(opendata, state);
c6d00e63 1341 nfs4_opendata_put(opendata);
864472e9 1342 return ret;
1da177e4
LT		 1343}
1344
13437e12 1345int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1346{
1347 struct nfs4_exception exception = { };
539cd03a 1348 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1349 int err;
1350 do {
13437e12 1351 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1352 switch (err) {
1353 case 0:
965b5d67
TM		 1354 case -ENOENT:
1355 case -ESTALE:
1356 goto out;
bcfa49f6
RL		 1357 case -NFS4ERR_BADSESSION:
1358 case -NFS4ERR_BADSLOT:
1359 case -NFS4ERR_BAD_HIGH_SLOT:
1360 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1361 case -NFS4ERR_DEADSESSION:
37380e42 1362 set_bit(NFS_DELEGATED_STATE, &state->flags);
9f594791 1363 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
37380e42 1364 err = -EAGAIN;
bcfa49f6 1365 goto out;
1da177e4
LT		 1366 case -NFS4ERR_STALE_CLIENTID:
1367 case -NFS4ERR_STALE_STATEID:
37380e42 1368 set_bit(NFS_DELEGATED_STATE, &state->flags);
1da177e4
LT		 1369 case -NFS4ERR_EXPIRED:
1370 /* Don't recall a delegation if it was lost */
0400a6b0 1371 nfs4_schedule_lease_recovery(server->nfs_client);
37380e42 1372 err = -EAGAIN;
965b5d67 1373 goto out;
a1d0b5ee 1374 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 1375 case -NFS4ERR_ADMIN_REVOKED:
1376 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 1377 nfs_inode_find_state_and_recover(state->inode,
1378 stateid);
0400a6b0 1379 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 1380 case -ENOMEM:
1381 err = 0;
1382 goto out;
1da177e4 1383 }
37380e42 1384 set_bit(NFS_DELEGATED_STATE, &state->flags);
1da177e4
LT		 1385 err = nfs4_handle_exception(server, err, &exception);
1386 } while (exception.retry);
965b5d67 1387out:
1da177e4
LT		 1388 return err;
1389}
1390
cdd4e68b
TM		 1391static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1392{
1393 struct nfs4_opendata *data = calldata;
1394
1395 data->rpc_status = task->tk_status;
26e976a8 1396 if (data->rpc_status == 0) {
f597c537 1397 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1398 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1399 renew_lease(data->o_res.server, data->timestamp);
3e309914 1400 data->rpc_done = 1;
26e976a8 1401 }
cdd4e68b
TM		 1402}
1403
1404static void nfs4_open_confirm_release(void *calldata)
1405{
1406 struct nfs4_opendata *data = calldata;
1407 struct nfs4_state *state = NULL;
1408
1409 /* If this request hasn't been cancelled, do nothing */
1410 if (data->cancelled == 0)
1411 goto out_free;
1412 /* In case of error, no cleanup! */
3e309914 1413 if (!data->rpc_done)
cdd4e68b 1414 goto out_free;
cdd4e68b 1415 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1416 if (!IS_ERR(state))
643168c2 1417 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1418out_free:
c6d00e63 1419 nfs4_opendata_put(data);
cdd4e68b
TM		 1420}
1421
1422static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1423 .rpc_call_done = nfs4_open_confirm_done,
1424 .rpc_release = nfs4_open_confirm_release,
1425};
1426
1427/*
1428 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1429 */
1430static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1431{
1432 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1433 struct rpc_task *task;
5138fde0
TM		 1434 struct rpc_message msg = {
1435 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1436 .rpc_argp = &data->c_arg,
1437 .rpc_resp = &data->c_res,
1438 .rpc_cred = data->owner->so_cred,
1439 };
c970aa85
TM		 1440 struct rpc_task_setup task_setup_data = {
1441 .rpc_client = server->client,
5138fde0 1442 .rpc_message = &msg,
c970aa85
TM		 1443 .callback_ops = &nfs4_open_confirm_ops,
1444 .callback_data = data,
101070ca 1445 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1446 .flags = RPC_TASK_ASYNC,
1447 };
1da177e4
LT		 1448 int status;
1449
c6d00e63 1450 kref_get(&data->kref);
3e309914
TM		 1451 data->rpc_done = 0;
1452 data->rpc_status = 0;
5138fde0 1453 data->timestamp = jiffies;
c970aa85 1454 task = rpc_run_task(&task_setup_data);
7a1218a2 1455 if (IS_ERR(task))
cdd4e68b 1456 return PTR_ERR(task);
cdd4e68b
TM		 1457 status = nfs4_wait_for_completion_rpc_task(task);
1458 if (status != 0) {
1459 data->cancelled = 1;
1460 smp_wmb();
1461 } else
1462 status = data->rpc_status;
e6b3c4db 1463 rpc_put_task(task);
1da177e4
LT		 1464 return status;
1465}
1466
24ac23ab 1467static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1468{
24ac23ab
TM		 1469 struct nfs4_opendata *data = calldata;
1470 struct nfs4_state_owner *sp = data->owner;
5138fde0 1471
24ac23ab 1472 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1473 goto out_wait;
aac00a8d
TM		 1474 /*
1475 * Check if we still need to send an OPEN call, or if we can use
1476 * a delegation instead.
1477 */
1478 if (data->state != NULL) {
1479 struct nfs_delegation *delegation;
1480
dc0b027d 1481 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1482 goto out_no_action;
aac00a8d
TM		 1483 rcu_read_lock();
1484 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1485 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1486 can_open_delegated(delegation, data->o_arg.fmode))
1487 goto unlock_no_action;
aac00a8d
TM		 1488 rcu_read_unlock();
1489 }
95b72eb0 1490 /* Update client id. */
1f0e890d 1491 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1492 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1493 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
e23008ec 1494 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
6f220ed5
TM		 1495 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1496 }
26e976a8 1497 data->timestamp = jiffies;
035168ab 1498 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1499 &data->o_arg.seq_args,
2240a9e2
TM		 1500 &data->o_res.seq_res,
1501 task) != 0)
1502 nfs_release_seqid(data->o_arg.seqid);
6ee41268 1503 return;
652f89f6
TM		 1504unlock_no_action:
1505 rcu_read_unlock();
6ee41268
TM		 1506out_no_action:
1507 task->tk_action = NULL;
c8da19b9 1508out_wait:
b75ad4cd 1509 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1510}
1511
24ac23ab
TM		 1512static void nfs4_open_done(struct rpc_task *task, void *calldata)
1513{
1514 struct nfs4_opendata *data = calldata;
1da177e4 1515
24ac23ab 1516 data->rpc_status = task->tk_status;
d898528c 1517
14516c3a
TM		 1518 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1519 return;
d898528c 1520
24ac23ab 1521 if (task->tk_status == 0) {
807d66d8
TM		 1522 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1523 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1524 case S_IFREG:
1525 break;
1526 case S_IFLNK:
24ac23ab 1527 data->rpc_status = -ELOOP;
6f926b5b
TM		 1528 break;
1529 case S_IFDIR:
24ac23ab 1530 data->rpc_status = -EISDIR;
6f926b5b
TM		 1531 break;
1532 default:
24ac23ab 1533 data->rpc_status = -ENOTDIR;
807d66d8 1534 }
6f926b5b 1535 }
26e976a8 1536 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1537 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1538 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1539 }
3e309914 1540 data->rpc_done = 1;
24ac23ab 1541}
6f926b5b 1542
24ac23ab
TM		 1543static void nfs4_open_release(void *calldata)
1544{
1545 struct nfs4_opendata *data = calldata;
1546 struct nfs4_state *state = NULL;
1547
1548 /* If this request hasn't been cancelled, do nothing */
1549 if (data->cancelled == 0)
1550 goto out_free;
1551 /* In case of error, no cleanup! */
3e309914 1552 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1553 goto out_free;
1554 /* In case we need an open_confirm, no cleanup! */
1555 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1556 goto out_free;
24ac23ab 1557 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1558 if (!IS_ERR(state))
643168c2 1559 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1560out_free:
c6d00e63 1561 nfs4_opendata_put(data);
24ac23ab
TM		 1562}
1563
1564static const struct rpc_call_ops nfs4_open_ops = {
1565 .rpc_call_prepare = nfs4_open_prepare,
1566 .rpc_call_done = nfs4_open_done,
1567 .rpc_release = nfs4_open_release,
1568};
1569
b257957e 1570static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1571{
1572 struct inode *dir = data->dir->d_inode;
1573 struct nfs_server *server = NFS_SERVER(dir);
1574 struct nfs_openargs *o_arg = &data->o_arg;
1575 struct nfs_openres *o_res = &data->o_res;
1576 struct rpc_task *task;
5138fde0
TM		 1577 struct rpc_message msg = {
1578 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1579 .rpc_argp = o_arg,
1580 .rpc_resp = o_res,
1581 .rpc_cred = data->owner->so_cred,
1582 };
c970aa85
TM		 1583 struct rpc_task_setup task_setup_data = {
1584 .rpc_client = server->client,
5138fde0 1585 .rpc_message = &msg,
c970aa85
TM		 1586 .callback_ops = &nfs4_open_ops,
1587 .callback_data = data,
101070ca 1588 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1589 .flags = RPC_TASK_ASYNC,
1590 };
24ac23ab
TM		 1591 int status;
1592
9d12b216 1593 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1594 kref_get(&data->kref);
3e309914
TM		 1595 data->rpc_done = 0;
1596 data->rpc_status = 0;
2ced46c2 1597 data->cancelled = 0;
b257957e 1598 if (isrecover)
8fe72bac 1599 nfs4_set_sequence_privileged(&o_arg->seq_args);
c970aa85 1600 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1601 if (IS_ERR(task))
1602 return PTR_ERR(task);
1603 status = nfs4_wait_for_completion_rpc_task(task);
1604 if (status != 0) {
1605 data->cancelled = 1;
1606 smp_wmb();
1607 } else
1608 status = data->rpc_status;
1609 rpc_put_task(task);
1610
1611 return status;
1612}
1613
1614static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1615{
1616 struct inode *dir = data->dir->d_inode;
1617 struct nfs_openres *o_res = &data->o_res;
1618 int status;
1619
1620 status = nfs4_run_open_task(data, 1);
1621 if (status != 0 || !data->rpc_done)
1622 return status;
1623
6926afd1
TM		 1624 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1625
b257957e
AB		 1626 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1627 status = _nfs4_proc_open_confirm(data);
1628 if (status != 0)
1629 return status;
1630 }
1631
1632 return status;
1633}
1634
6168f62c
WAA		 1635static int nfs4_opendata_access(struct rpc_cred *cred,
1636 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1637 struct nfs4_state *state, fmode_t fmode,
1638 int openflags)
6168f62c
WAA		 1639{
1640 struct nfs_access_entry cache;
1641 u32 mask;
1642
1643 /* access call failed or for some reason the server doesn't
1644 * support any access modes -- defer access call until later */
1645 if (opendata->o_res.access_supported == 0)
1646 return 0;
1647
1648 mask = 0;
bbd3a8ee 1649 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1650 * write mode bits, but POSIX allows the creating process to write.
1651 * use openflags to check for exec, because fmode won't
1652 * always have FMODE_EXEC set when file open for exec. */
1653 if (openflags & __FMODE_EXEC) {
1654 /* ONLY check for exec rights */
1655 mask = MAY_EXEC;
1656 } else if (fmode & FMODE_READ)
1657 mask = MAY_READ;
6168f62c
WAA		 1658
1659 cache.cred = cred;
1660 cache.jiffies = jiffies;
1661 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1662 nfs_access_add_cache(state->inode, &cache);
1663
bbd3a8ee 1664 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1665 return 0;
1666
1667 /* even though OPEN succeeded, access is denied. Close the file */
1668 nfs4_close_state(state, fmode);
998f40b5 1669 return -EACCES;
6168f62c
WAA		 1670}
1671
b257957e
AB		 1672/*
1673 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1674 */
1675static int _nfs4_proc_open(struct nfs4_opendata *data)
1676{
1677 struct inode *dir = data->dir->d_inode;
1678 struct nfs_server *server = NFS_SERVER(dir);
1679 struct nfs_openargs *o_arg = &data->o_arg;
1680 struct nfs_openres *o_res = &data->o_res;
1681 int status;
1682
1683 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1684 if (!data->rpc_done)
1685 return status;
1686 if (status != 0) {
1687 if (status == -NFS4ERR_BADNAME &&
1688 !(o_arg->open_flags & O_CREAT))
1689 return -ENOENT;
24ac23ab 1690 return status;
08ef7bd3 1691 }
24ac23ab 1692
6926afd1
TM		 1693 nfs_fattr_map_and_free_names(server, &data->f_attr);
1694
90ff0c54 1695 if (o_arg->open_flags & O_CREAT)
56ae19f3 1696 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1697 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1698 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1699 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1700 status = _nfs4_proc_open_confirm(data);
1da177e4 1701 if (status != 0)
24ac23ab 1702 return status;
1da177e4
LT		 1703 }
1704 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1705 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1706 return 0;
1da177e4
LT		 1707}
1708
d83217c1
AA		 1709static int nfs4_recover_expired_lease(struct nfs_server *server)
1710{
1711 return nfs4_client_recover_expired_lease(server->nfs_client);
1712}
1713
1da177e4
LT		 1714/*
1715 * OPEN_EXPIRED:
1716 * reclaim state on the server after a network partition.
1717 * Assumes caller holds the appropriate lock
1718 */
539cd03a 1719static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1720{
e56e0b78 1721 struct nfs4_opendata *opendata;
864472e9 1722 int ret;
1da177e4 1723
6f220ed5
TM		 1724 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1725 if (IS_ERR(opendata))
1726 return PTR_ERR(opendata);
864472e9 1727 ret = nfs4_open_recover(opendata, state);
35d05778 1728 if (ret == -ESTALE)
3d4ff43d 1729 d_drop(ctx->dentry);
c6d00e63 1730 nfs4_opendata_put(opendata);
864472e9 1731 return ret;
1da177e4
LT		 1732}
1733
a9ed2e25 1734static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1735{
539cd03a 1736 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1737 struct nfs4_exception exception = { };
1738 int err;
1739
1740 do {
539cd03a 1741 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1742 switch (err) {
1743 default:
1744 goto out;
1745 case -NFS4ERR_GRACE:
1746 case -NFS4ERR_DELAY:
1747 nfs4_handle_exception(server, err, &exception);
1748 err = 0;
1749 }
202b50dc 1750 } while (exception.retry);
a9ed2e25 1751out:
202b50dc
TM		 1752 return err;
1753}
1754
1da177e4
LT		 1755static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1756{
1da177e4 1757 struct nfs_open_context *ctx;
864472e9 1758 int ret;
1da177e4 1759
864472e9
TM		 1760 ctx = nfs4_state_find_open_context(state);
1761 if (IS_ERR(ctx))
1762 return PTR_ERR(ctx);
539cd03a 1763 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1764 put_nfs_open_context(ctx);
1765 return ret;
1da177e4
LT		 1766}
1767
f062eb6c 1768#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1769static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1770{
f062eb6c 1771 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1772 nfs4_stateid *stateid = &state->stateid;
1773 int status;
1774
1775 /* If a state reset has been done, test_stateid is unneeded */
1776 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1777 return;
1778
1779 status = nfs41_test_stateid(server, stateid);
1780 if (status != NFS_OK) {
1781 /* Free the stateid unless the server explicitly
1782 * informs us the stateid is unrecognized. */
1783 if (status != -NFS4ERR_BAD_STATEID)
1784 nfs41_free_stateid(server, stateid);
6938867e 1785 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1786
6938867e
BS		 1787 write_seqlock(&state->seqlock);
1788 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1789 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1790 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1791 }
1792}
1793
1794/**
1795 * nfs41_check_open_stateid - possibly free an open stateid
1796 *
1797 * @state: NFSv4 state for an inode
1798 *
1799 * Returns NFS_OK if recovery for this stateid is now finished.
1800 * Otherwise a negative NFS4ERR value is returned.
1801 */
1802static int nfs41_check_open_stateid(struct nfs4_state *state)
1803{
1804 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1805 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1806 int status;
1807
1808 /* If a state reset has been done, test_stateid is unneeded */
1809 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1810 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1811 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1812 return -NFS4ERR_BAD_STATEID;
1813
1814 status = nfs41_test_stateid(server, stateid);
1815 if (status != NFS_OK) {
1816 /* Free the stateid unless the server explicitly
1817 * informs us the stateid is unrecognized. */
1818 if (status != -NFS4ERR_BAD_STATEID)
1819 nfs41_free_stateid(server, stateid);
1820
1821 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1822 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1823 clear_bit(NFS_O_RDWR_STATE, &state->flags);
b01dd1d8
BS		 1824 }
1825 return status;
1826}
1827
1828static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1829{
eb64cf96 1830 int status;
b01dd1d8 1831
3e60ffdd
CL		 1832 nfs41_clear_delegation_stateid(state);
1833 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1834 if (status != NFS_OK)
1835 status = nfs4_open_expired(sp, state);
1836 return status;
f062eb6c
BS		 1837}
1838#endif
1839
aa53ed54
JL		 1840/*
1841 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1842 * fields corresponding to attributes that were used to store the verifier.
1843 * Make sure we clobber those fields in the later setattr call
1844 */
1845static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1846{
1847 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1848 !(sattr->ia_valid & ATTR_ATIME_SET))
1849 sattr->ia_valid |= ATTR_ATIME;
1850
1851 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1852 !(sattr->ia_valid & ATTR_MTIME_SET))
1853 sattr->ia_valid |= ATTR_MTIME;
1854}
1855
c21443c2
TM		 1856static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1857 fmode_t fmode,
1858 int flags,
1859 struct nfs4_state **res)
1860{
1861 struct nfs4_state_owner *sp = opendata->owner;
1862 struct nfs_server *server = sp->so_server;
1863 struct nfs4_state *state;
1864 unsigned int seq;
1865 int ret;
1866
1867 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1868
1869 ret = _nfs4_proc_open(opendata);
1870 if (ret != 0)
1871 goto out;
1872
1873 state = nfs4_opendata_to_nfs4_state(opendata);
1874 ret = PTR_ERR(state);
1875 if (IS_ERR(state))
1876 goto out;
1877 if (server->caps & NFS_CAP_POSIX_LOCK)
1878 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1879
1880 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1881 if (ret != 0)
1882 goto out;
1883
1884 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
1885 nfs4_schedule_stateid_recovery(server, state);
1886 nfs4_wait_clnt_recover(server->nfs_client);
1887 }
1888 *res = state;
1889out:
1890 return ret;
1891}
1892
1da177e4 1893/*
24ac23ab 1894 * Returns a referenced nfs4_state
1da177e4 1895 */
82be417a
AA		 1896static int _nfs4_do_open(struct inode *dir,
1897 struct dentry *dentry,
1898 fmode_t fmode,
1899 int flags,
1900 struct iattr *sattr,
1901 struct rpc_cred *cred,
1902 struct nfs4_state **res,
1903 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1904{
1905 struct nfs4_state_owner *sp;
1906 struct nfs4_state *state = NULL;
1907 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1908 struct nfs4_opendata *opendata;
aac00a8d 1909 int status;
1da177e4
LT		 1910
1911 /* Protect against reboot recovery conflicts */
1da177e4 1912 status = -ENOMEM;
d1e284d5
TM		 1913 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1914 if (sp == NULL) {
1da177e4
LT		 1915 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1916 goto out_err;
1917 }
58d9714a
TM		 1918 status = nfs4_recover_expired_lease(server);
1919 if (status != 0)
b4454fe1 1920 goto err_put_state_owner;
82a2c1b7
AV		 1921 if (dentry->d_inode != NULL)
1922 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1923 status = -ENOMEM;
82a2c1b7 1924 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1925 if (opendata == NULL)
95d35cb4 1926 goto err_put_state_owner;
1da177e4 1927
82be417a
AA		 1928 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1929 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1930 if (!opendata->f_attr.mdsthreshold)
1931 goto err_opendata_put;
1549210f 1932 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 1933 }
82a2c1b7
AV		 1934 if (dentry->d_inode != NULL)
1935 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1936
c21443c2 1937 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
6168f62c
WAA		 1938 if (status != 0)
1939 goto err_opendata_put;
1940
0ab64e0e
TM		 1941 if (opendata->o_arg.open_flags & O_EXCL) {
1942 nfs4_exclusive_attrset(opendata, sattr);
1943
1944 nfs_fattr_init(opendata->o_res.f_attr);
1945 status = nfs4_do_setattr(state->inode, cred,
1946 opendata->o_res.f_attr, sattr,
1947 state);
1948 if (status == 0)
1949 nfs_setattr_update_inode(state->inode, sattr);
1950 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1951 }
82be417a
AA		 1952
1953 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1954 *ctx_th = opendata->f_attr.mdsthreshold;
1955 else
1956 kfree(opendata->f_attr.mdsthreshold);
1957 opendata->f_attr.mdsthreshold = NULL;
1958
c6d00e63 1959 nfs4_opendata_put(opendata);
1da177e4 1960 nfs4_put_state_owner(sp);
1da177e4
LT		 1961 *res = state;
1962 return 0;
c6d00e63 1963err_opendata_put:
82be417a 1964 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 1965 nfs4_opendata_put(opendata);
e56e0b78
TM		 1966err_put_state_owner:
1967 nfs4_put_state_owner(sp);
1da177e4 1968out_err:
1da177e4
LT		 1969 *res = NULL;
1970 return status;
1971}
1972
1973
82be417a
AA		 1974static struct nfs4_state *nfs4_do_open(struct inode *dir,
1975 struct dentry *dentry,
1976 fmode_t fmode,
1977 int flags,
1978 struct iattr *sattr,
1979 struct rpc_cred *cred,
1980 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1981{
1982 struct nfs4_exception exception = { };
1983 struct nfs4_state *res;
1984 int status;
1985
6168f62c 1986 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 1987 do {
82be417a
AA		 1988 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1989 &res, ctx_th);
1da177e4
LT		 1990 if (status == 0)
1991 break;
1992 /* NOTE: BAD_SEQID means the server and client disagree about the
1993 * book-keeping w.r.t. state-changing operations
1994 * (OPEN/CLOSE/LOCK/LOCKU...)
1995 * It is actually a sign of a bug on the client or on the server.
1996 *
1997 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1998 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1999 * have unhashed the old state_owner for us, and that we can
2000 * therefore safely retry using a new one. We should still warn
2001 * the user though...
2002 */
2003 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2004 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2005 " returned a bad sequence-id error!\n",
2006 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2007 exception.retry = 1;
2008 continue;
2009 }
550f5747
TM		 2010 /*
2011 * BAD_STATEID on OPEN means that the server cancelled our
2012 * state before it received the OPEN_CONFIRM.
2013 * Recover by retrying the request as per the discussion
2014 * on Page 181 of RFC3530.
2015 */
2016 if (status == -NFS4ERR_BAD_STATEID) {
2017 exception.retry = 1;
2018 continue;
2019 }
aac00a8d
TM		 2020 if (status == -EAGAIN) {
2021 /* We must have found a delegation */
2022 exception.retry = 1;
2023 continue;
2024 }
1da177e4
LT		 2025 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
2026 status, &exception));
2027 } while (exception.retry);
2028 return res;
2029}
2030
659bfcd6
TM		 2031static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2032 struct nfs_fattr *fattr, struct iattr *sattr,
2033 struct nfs4_state *state)
1da177e4 2034{
3e4f6290 2035 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2036 struct nfs_setattrargs arg = {
3e4f6290 2037 .fh = NFS_FH(inode),
1da177e4
LT		 2038 .iap = sattr,
2039 .server = server,
2040 .bitmask = server->attr_bitmask,
2041 };
2042 struct nfs_setattrres res = {
2043 .fattr = fattr,
2044 .server = server,
2045 };
2046 struct rpc_message msg = {
659bfcd6
TM		 2047 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2048 .rpc_argp = &arg,
2049 .rpc_resp = &res,
2050 .rpc_cred = cred,
1da177e4 2051 };
26e976a8 2052 unsigned long timestamp = jiffies;
65e4308d 2053 int status;
1da177e4 2054
0e574af1 2055 nfs_fattr_init(fattr);
1da177e4 2056
4fc8796d 2057 if (state != NULL) {
2a369153
TM		 2058 struct nfs_lockowner lockowner = {
2059 .l_owner = current->files,
2060 .l_pid = current->tgid,
2061 };
4fc8796d 2062 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2063 &lockowner);
4fc8796d
TM		 2064 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2065 FMODE_WRITE)) {
3e4f6290 2066 /* Use that stateid */
08e9eac4 2067 } else
f597c537 2068 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2069
7c513058 2070 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2071 if (status == 0 && state != NULL)
2072 renew_lease(server, timestamp);
65e4308d 2073 return status;
1da177e4
LT		 2074}
2075
659bfcd6
TM		 2076static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2077 struct nfs_fattr *fattr, struct iattr *sattr,
2078 struct nfs4_state *state)
1da177e4 2079{
3e4f6290 2080 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2081 struct nfs4_exception exception = {
2082 .state = state,
3114ea7a 2083 .inode = inode,
a1d0b5ee 2084 };
1da177e4
LT		 2085 int err;
2086 do {
451146be
TM		 2087 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2088 switch (err) {
2089 case -NFS4ERR_OPENMODE:
2090 if (state && !(state->state & FMODE_WRITE)) {
2091 err = -EBADF;
2092 if (sattr->ia_valid & ATTR_OPEN)
2093 err = -EACCES;
2094 goto out;
2095 }
2096 }
2097 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2098 } while (exception.retry);
451146be 2099out:
1da177e4
LT		 2100 return err;
2101}
2102
2103struct nfs4_closedata {
2104 struct inode *inode;
2105 struct nfs4_state *state;
2106 struct nfs_closeargs arg;
2107 struct nfs_closeres res;
516a6af6 2108 struct nfs_fattr fattr;
26e976a8 2109 unsigned long timestamp;
f7e8917a
FI		 2110 bool roc;
2111 u32 roc_barrier;
1da177e4
LT		 2112};
2113
963d8fe5 2114static void nfs4_free_closedata(void *data)
9512135d 2115{
963d8fe5
TM		 2116 struct nfs4_closedata *calldata = data;
2117 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2118 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2119
f7e8917a
FI		 2120 if (calldata->roc)
2121 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2122 nfs4_put_open_state(calldata->state);
2123 nfs_free_seqid(calldata->arg.seqid);
9512135d 2124 nfs4_put_state_owner(sp);
322b2b90 2125 nfs_sb_deactive(sb);
9512135d
TM		 2126 kfree(calldata);
2127}
2128
88069f77
TM		 2129static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2130 fmode_t fmode)
2131{
2132 spin_lock(&state->owner->so_lock);
2133 if (!(fmode & FMODE_READ))
2134 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2135 if (!(fmode & FMODE_WRITE))
2136 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2137 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2138 spin_unlock(&state->owner->so_lock);
2139}
2140
963d8fe5 2141static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2142{
963d8fe5 2143 struct nfs4_closedata *calldata = data;
1da177e4 2144 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2145 struct nfs_server *server = NFS_SERVER(calldata->inode);
2146
a3ca5651 2147 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2148 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2149 return;
1da177e4
LT		 2150 /* hmm. we are done with the inode, and in the process of freeing
2151 * the state_owner. we keep this around to process errors
2152 */
1da177e4
LT		 2153 switch (task->tk_status) {
2154 case 0:
f7e8917a
FI		 2155 if (calldata->roc)
2156 pnfs_roc_set_barrier(state->inode,
2157 calldata->roc_barrier);
45328c35 2158 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2159 renew_lease(server, calldata->timestamp);
88069f77
TM		 2160 nfs4_close_clear_stateid_flags(state,
2161 calldata->arg.fmode);
1da177e4
LT		 2162 break;
2163 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2164 case -NFS4ERR_OLD_STATEID:
2165 case -NFS4ERR_BAD_STATEID:
1da177e4 2166 case -NFS4ERR_EXPIRED:
dc0b027d 2167 if (calldata->arg.fmode == 0)
9e33bed5 2168 break;
1da177e4 2169 default:
72211dbe
TM		 2170 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2171 rpc_restart_call_prepare(task);
1da177e4 2172 }
72211dbe 2173 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2174 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2175 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2176}
2177
4ce70ada 2178static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2179{
4ce70ada 2180 struct nfs4_closedata *calldata = data;
9512135d 2181 struct nfs4_state *state = calldata->state;
7fdab069 2182 struct inode *inode = calldata->inode;
88069f77 2183 int call_close = 0;
9512135d 2184
a3ca5651 2185 dprintk("%s: begin!\n", __func__);
963d8fe5 2186 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2187 goto out_wait;
003707c7 2188
88069f77
TM		 2189 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2190 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2191 spin_lock(&state->owner->so_lock);
003707c7 2192 /* Calculate the change in open mode */
e7616923 2193 if (state->n_rdwr == 0) {
003707c7 2194 if (state->n_rdonly == 0) {
88069f77
TM		 2195 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2196 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2197 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2198 }
2199 if (state->n_wronly == 0) {
88069f77
TM		 2200 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2201 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2202 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2203 }
e7616923 2204 }
4cecb76f 2205 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2206
2207 if (!call_close) {
963d8fe5 2208 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2209 goto out_no_action;
9512135d 2210 }
88069f77 2211
f7e8917a 2212 if (calldata->arg.fmode == 0) {
88069f77 2213 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2214 if (calldata->roc &&
7fdab069 2215 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
c8da19b9 2216 goto out_wait;
f7e8917a 2217 }
88069f77 2218
516a6af6 2219 nfs_fattr_init(calldata->res.fattr);
26e976a8 2220 calldata->timestamp = jiffies;
7fdab069 2221 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2222 &calldata->arg.seq_args,
2223 &calldata->res.seq_res,
2240a9e2
TM		 2224 task) != 0)
2225 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2226 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2227 return;
2228out_no_action:
2229 task->tk_action = NULL;
2230out_wait:
2231 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2232}
2233
963d8fe5 2234static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2235 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2236 .rpc_call_done = nfs4_close_done,
2237 .rpc_release = nfs4_free_closedata,
2238};
2239
1da177e4
LT		 2240/*
2241 * It is possible for data to be read/written from a mem-mapped file
2242 * after the sys_close call (which hits the vfs layer as a flush).
2243 * This means that we can't safely call nfsv4 close on a file until
2244 * the inode is cleared. This in turn means that we are not good
2245 * NFSv4 citizens - we do not indicate to the server to update the file's
2246 * share state even when we are done with one of the three share
2247 * stateid's in the inode.
2248 *
2249 * NOTE: Caller must be holding the sp->so_owner semaphore!
2250 */
1f7977c1 2251int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2252{
4a35bd41 2253 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2254 struct nfs4_closedata *calldata;
b39e625b
TM		 2255 struct nfs4_state_owner *sp = state->owner;
2256 struct rpc_task *task;
5138fde0
TM		 2257 struct rpc_message msg = {
2258 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2259 .rpc_cred = state->owner->so_cred,
2260 };
c970aa85
TM		 2261 struct rpc_task_setup task_setup_data = {
2262 .rpc_client = server->client,
5138fde0 2263 .rpc_message = &msg,
c970aa85 2264 .callback_ops = &nfs4_close_ops,
101070ca 2265 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2266 .flags = RPC_TASK_ASYNC,
2267 };
9512135d 2268 int status = -ENOMEM;
1da177e4 2269
8535b2be 2270 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2271 if (calldata == NULL)
9512135d 2272 goto out;
9d12b216 2273 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2274 calldata->inode = state->inode;
1da177e4 2275 calldata->state = state;
4a35bd41 2276 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2277 calldata->arg.stateid = &state->open_stateid;
1da177e4 2278 /* Serialization for the sequence id */
8535b2be 2279 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2280 if (calldata->arg.seqid == NULL)
2281 goto out_free_calldata;
dc0b027d 2282 calldata->arg.fmode = 0;
a65318bf 2283 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2284 calldata->res.fattr = &calldata->fattr;
c1d51931 2285 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2286 calldata->res.server = server;
1f7977c1 2287 calldata->roc = pnfs_roc(state->inode);
643168c2 2288 nfs_sb_active(calldata->inode->i_sb);
9512135d 2289
1174dd1f
TM		 2290 msg.rpc_argp = &calldata->arg;
2291 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2292 task_setup_data.callback_data = calldata;
2293 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2294 if (IS_ERR(task))
2295 return PTR_ERR(task);
a49c3c77
TM		 2296 status = 0;
2297 if (wait)
2298 status = rpc_wait_for_completion_task(task);
b39e625b 2299 rpc_put_task(task);
a49c3c77 2300 return status;
9512135d
TM		 2301out_free_calldata:
2302 kfree(calldata);
2303out:
b39e625b
TM		 2304 nfs4_put_open_state(state);
2305 nfs4_put_state_owner(sp);
9512135d 2306 return status;
1da177e4
LT		 2307}
2308
2b484297 2309static struct inode *
cd9a1c0e 2310nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2311{
1da177e4 2312 struct nfs4_state *state;
1da177e4 2313
565277f6 2314 /* Protect against concurrent sillydeletes */
82be417a
AA		 2315 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2316 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2317 if (IS_ERR(state))
2318 return ERR_CAST(state);
cd9a1c0e 2319 ctx->state = state;
f46e0bd3 2320 return igrab(state->inode);
1da177e4
LT		 2321}
2322
1185a552 2323static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2324{
2325 if (ctx->state == NULL)
2326 return;
2327 if (is_sync)
643168c2 2328 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2329 else
643168c2 2330 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2331}
1da177e4
LT		 2332
2333static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2334{
43652ad5
BH		 2335 struct nfs4_server_caps_arg args = {
2336 .fhandle = fhandle,
2337 };
1da177e4
LT		 2338 struct nfs4_server_caps_res res = {};
2339 struct rpc_message msg = {
2340 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2341 .rpc_argp = &args,
1da177e4
LT		 2342 .rpc_resp = &res,
2343 };
2344 int status;
2345
7c513058 2346 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2347 if (status == 0) {
2348 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2349 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2350 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2351 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2352 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2353 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2354 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2355 server->caps |= NFS_CAP_ACLS;
2356 if (res.has_links != 0)
2357 server->caps |= NFS_CAP_HARDLINKS;
2358 if (res.has_symlinks != 0)
2359 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2360 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2361 server->caps |= NFS_CAP_FILEID;
2362 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2363 server->caps |= NFS_CAP_MODE;
2364 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2365 server->caps |= NFS_CAP_NLINK;
2366 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2367 server->caps |= NFS_CAP_OWNER;
2368 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2369 server->caps |= NFS_CAP_OWNER_GROUP;
2370 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2371 server->caps |= NFS_CAP_ATIME;
2372 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2373 server->caps |= NFS_CAP_CTIME;
2374 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2375 server->caps |= NFS_CAP_MTIME;
2376
a65318bf
TM		 2377 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2378 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2379 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2380 server->acl_bitmask = res.acl_bitmask;
264e6351 2381 server->fh_expire_type = res.fh_expire_type;
1da177e4 2382 }
cccef3b9 2383
1da177e4
LT		 2384 return status;
2385}
2386
55a97593 2387int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2388{
2389 struct nfs4_exception exception = { };
2390 int err;
2391 do {
2392 err = nfs4_handle_exception(server,
2393 _nfs4_server_capabilities(server, fhandle),
2394 &exception);
2395 } while (exception.retry);
2396 return err;
2397}
2398
2399static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2400 struct nfs_fsinfo *info)
2401{
1da177e4
LT		 2402 struct nfs4_lookup_root_arg args = {
2403 .bitmask = nfs4_fattr_bitmap,
2404 };
2405 struct nfs4_lookup_res res = {
2406 .server = server,
0e574af1 2407 .fattr = info->fattr,
1da177e4
LT		 2408 .fh = fhandle,
2409 };
2410 struct rpc_message msg = {
2411 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2412 .rpc_argp = &args,
2413 .rpc_resp = &res,
2414 };
008f55d0 2415
0e574af1 2416 nfs_fattr_init(info->fattr);
7c513058 2417 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2418}
2419
2420static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2421 struct nfs_fsinfo *info)
2422{
2423 struct nfs4_exception exception = { };
2424 int err;
2425 do {
fb8a5ba8
BS		 2426 err = _nfs4_lookup_root(server, fhandle, info);
2427 switch (err) {
2428 case 0:
2429 case -NFS4ERR_WRONGSEC:
05e9cfb4 2430 goto out;
fb8a5ba8
BS		 2431 default:
2432 err = nfs4_handle_exception(server, err, &exception);
2433 }
1da177e4 2434 } while (exception.retry);
05e9cfb4 2435out:
1da177e4
LT		 2436 return err;
2437}
2438
8f70e95f
BS		 2439static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2440 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2441{
2442 struct rpc_auth *auth;
2443 int ret;
2444
2445 auth = rpcauth_create(flavor, server->client);
e8d920c5 2446 if (IS_ERR(auth)) {
8f70e95f
BS		 2447 ret = -EIO;
2448 goto out;
2449 }
2450 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2451out:
2452 return ret;
2453}
2454
801a16dc 2455static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2456 struct nfs_fsinfo *info)
1da177e4 2457{
8f70e95f 2458 int i, len, status = 0;
0fabee24 2459 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2460
6a1a1e34 2461 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
4ea8fed5
TM		 2462 if (len < 0)
2463 return len;
8f70e95f
BS		 2464
2465 for (i = 0; i < len; i++) {
6a1a1e34
CL		 2466 /* AUTH_UNIX is the default flavor if none was specified,
2467 * thus has already been tried. */
2468 if (flav_array[i] == RPC_AUTH_UNIX)
2469 continue;
2470
8f70e95f 2471 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2472 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2473 continue;
2474 break;
8f70e95f 2475 }
fb8a5ba8
BS		 2476 /*
2477 * -EACCESS could mean that the user doesn't have correct permissions
2478 * to access the mount. It could also mean that we tried to mount
2479 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2480 * existing mount programs don't handle -EACCES very well so it should
2481 * be mapped to -EPERM instead.
2482 */
2483 if (status == -EACCES)
2484 status = -EPERM;
801a16dc
BS		 2485 return status;
2486}
2487
2488/*
2489 * get the file handle for the "/" directory on the server
2490 */
3028eb2b
BS		 2491int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2492 struct nfs_fsinfo *info)
801a16dc 2493{
fca78d6d 2494 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2495 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2496 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2497 /*
2498 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2499 * by nfs4_map_errors() as this function exits.
2500 */
fca78d6d 2501 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2502 if (status == 0)
2503 status = nfs4_server_capabilities(server, fhandle);
2504 if (status == 0)
2505 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2506 return nfs4_map_errors(status);
1da177e4
LT		 2507}
2508
bae36241
BS		 2509static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2510 struct nfs_fsinfo *info)
2511{
2512 int error;
2513 struct nfs_fattr *fattr = info->fattr;
2514
2515 error = nfs4_server_capabilities(server, mntfh);
2516 if (error < 0) {
2517 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2518 return error;
2519 }
2520
2521 error = nfs4_proc_getattr(server, mntfh, fattr);
2522 if (error < 0) {
2523 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2524 return error;
2525 }
2526
2527 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2528 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2529 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2530
2531 return error;
2532}
2533
6b97fd3d
MN		 2534/*
2535 * Get locations and (maybe) other attributes of a referral.
2536 * Note that we'll actually follow the referral later when
2537 * we detect fsid mismatch in inode revalidation
2538 */
f05d147f
BS		 2539static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2540 const struct qstr *name, struct nfs_fattr *fattr,
2541 struct nfs_fh *fhandle)
6b97fd3d
MN		 2542{
2543 int status = -ENOMEM;
2544 struct page *page = NULL;
2545 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2546
2547 page = alloc_page(GFP_KERNEL);
2548 if (page == NULL)
2549 goto out;
2550 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2551 if (locations == NULL)
2552 goto out;
2553
f05d147f 2554 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2555 if (status != 0)
2556 goto out;
2557 /* Make sure server returned a different fsid for the referral */
2558 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2559 dprintk("%s: server did not return a different fsid for"
2560 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2561 status = -EIO;
2562 goto out;
2563 }
533eb461
AA		 2564 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2565 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2566
533eb461 2567 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2568 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2569 memset(fhandle, 0, sizeof(struct nfs_fh));
2570out:
2571 if (page)
2572 __free_page(page);
5d7ca35a 2573 kfree(locations);
6b97fd3d
MN		 2574 return status;
2575}
2576
1da177e4
LT		 2577static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2578{
2579 struct nfs4_getattr_arg args = {
2580 .fh = fhandle,
2581 .bitmask = server->attr_bitmask,
2582 };
2583 struct nfs4_getattr_res res = {
2584 .fattr = fattr,
2585 .server = server,
2586 };
2587 struct rpc_message msg = {
2588 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2589 .rpc_argp = &args,
2590 .rpc_resp = &res,
2591 };
2592
0e574af1 2593 nfs_fattr_init(fattr);
7c513058 2594 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2595}
2596
2597static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2598{
2599 struct nfs4_exception exception = { };
2600 int err;
2601 do {
2602 err = nfs4_handle_exception(server,
2603 _nfs4_proc_getattr(server, fhandle, fattr),
2604 &exception);
2605 } while (exception.retry);
2606 return err;
2607}
2608
2609/*
2610 * The file is not closed if it is opened due to the a request to change
2611 * the size of the file. The open call will not be needed once the
2612 * VFS layer lookup-intents are implemented.
2613 *
2614 * Close is called when the inode is destroyed.
2615 * If we haven't opened the file for O_WRONLY, we
2616 * need to in the size_change case to obtain a stateid.
2617 *
2618 * Got race?
2619 * Because OPEN is always done by name in nfsv4, it is
2620 * possible that we opened a different file by the same
2621 * name. We can recognize this race condition, but we
2622 * can't do anything about it besides returning an error.
2623 *
2624 * This will be fixed with VFS changes (lookup-intent).
2625 */
2626static int
2627nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2628 struct iattr *sattr)
2629{
08e9eac4 2630 struct inode *inode = dentry->d_inode;
659bfcd6 2631 struct rpc_cred *cred = NULL;
d530838b 2632 struct nfs4_state *state = NULL;
1da177e4
LT		 2633 int status;
2634
8a1636c4 2635 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2636 pnfs_commit_and_return_layout(inode);
8a1636c4 2637
0e574af1 2638 nfs_fattr_init(fattr);
1da177e4 2639
2669940d
AA		 2640 /* Deal with open(O_TRUNC) */
2641 if (sattr->ia_valid & ATTR_OPEN)
2642 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2643
2644 /* Optimization: if the end result is no change, don't RPC */
2645 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2646 return 0;
2647
d530838b 2648 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2649 if (sattr->ia_valid & ATTR_FILE) {
2650 struct nfs_open_context *ctx;
2651
2652 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2653 if (ctx) {
2654 cred = ctx->cred;
2655 state = ctx->state;
2656 }
659bfcd6 2657 }
08e9eac4 2658
659bfcd6 2659 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2660 if (status == 0)
2661 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2662 return status;
2663}
2664
0c2e53f1
TM		 2665static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2666 const struct qstr *name, struct nfs_fh *fhandle,
2667 struct nfs_fattr *fattr)
2b3de441 2668{
0c2e53f1 2669 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2670 int status;
2671 struct nfs4_lookup_arg args = {
2672 .bitmask = server->attr_bitmask,
0c2e53f1 2673 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2674 .name = name,
2675 };
2676 struct nfs4_lookup_res res = {
2677 .server = server,
2678 .fattr = fattr,
2679 .fh = fhandle,
2680 };
2681 struct rpc_message msg = {
2682 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2683 .rpc_argp = &args,
2684 .rpc_resp = &res,
2685 };
2686
2687 nfs_fattr_init(fattr);
2688
1da177e4 2689 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2690 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2691 dprintk("NFS reply lookup: %d\n", status);
2692 return status;
2693}
2694
72de53ec 2695static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2696{
7ebb9315 2697 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2698 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2699 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2700 fattr->nlink = 2;
2701}
2702
72de53ec
BS		 2703static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2704 struct qstr *name, struct nfs_fh *fhandle,
2705 struct nfs_fattr *fattr)
1da177e4
LT		 2706{
2707 struct nfs4_exception exception = { };
72de53ec 2708 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2709 int err;
2710 do {
72de53ec
BS		 2711 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2712 switch (err) {
08ef7bd3 2713 case -NFS4ERR_BADNAME:
72de53ec
BS		 2714 err = -ENOENT;
2715 goto out;
0c2e53f1 2716 case -NFS4ERR_MOVED:
f05d147f 2717 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2718 goto out;
0c2e53f1 2719 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2720 err = -EPERM;
2721 if (client != *clnt)
2722 goto out;
2723
2724 client = nfs4_create_sec_client(client, dir, name);
2725 if (IS_ERR(client))
2726 return PTR_ERR(client);
2727
2728 exception.retry = 1;
2729 break;
2730 default:
2731 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2732 }
1da177e4 2733 } while (exception.retry);
72de53ec
BS		 2734
2735out:
2736 if (err == 0)
2737 *clnt = client;
2738 else if (client != *clnt)
2739 rpc_shutdown_client(client);
2740
1da177e4
LT		 2741 return err;
2742}
2743
80a16b21 2744static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2745 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2746{
2747 int status;
2748 struct rpc_clnt *client = NFS_CLIENT(dir);
2749
2750 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2751 if (client != NFS_CLIENT(dir)) {
2752 rpc_shutdown_client(client);
2753 nfs_fixup_secinfo_attributes(fattr);
2754 }
2755 return status;
2756}
2757
f05d147f
BS		 2758struct rpc_clnt *
2759nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2760 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2761{
2762 int status;
2763 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2764
2765 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2766 if (status < 0) {
2767 rpc_shutdown_client(client);
2768 return ERR_PTR(status);
2769 }
2770 return client;
2771}
2772
1da177e4
LT		 2773static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2774{
76b32999 2775 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2776 struct nfs4_accessargs args = {
2777 .fh = NFS_FH(inode),
a4980e78 2778 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2779 };
2780 struct nfs4_accessres res = {
2781 .server = server,
1da177e4 2782 };
1da177e4
LT		 2783 struct rpc_message msg = {
2784 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2785 .rpc_argp = &args,
2786 .rpc_resp = &res,
2787 .rpc_cred = entry->cred,
2788 };
2789 int mode = entry->mask;
2790 int status;
2791
2792 /*
2793 * Determine which access bits we want to ask for...
2794 */
2795 if (mode & MAY_READ)
2796 args.access |= NFS4_ACCESS_READ;
2797 if (S_ISDIR(inode->i_mode)) {
2798 if (mode & MAY_WRITE)
2799 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2800 if (mode & MAY_EXEC)
2801 args.access |= NFS4_ACCESS_LOOKUP;
2802 } else {
2803 if (mode & MAY_WRITE)
2804 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2805 if (mode & MAY_EXEC)
2806 args.access |= NFS4_ACCESS_EXECUTE;
2807 }
c407d41a
TM		 2808
2809 res.fattr = nfs_alloc_fattr();
2810 if (res.fattr == NULL)
2811 return -ENOMEM;
2812
7c513058 2813 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2814 if (!status) {
6168f62c 2815 nfs_access_set_mask(entry, res.access);
c407d41a 2816 nfs_refresh_inode(inode, res.fattr);
1da177e4 2817 }
c407d41a 2818 nfs_free_fattr(res.fattr);
1da177e4
LT		 2819 return status;
2820}
2821
2822static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2823{
2824 struct nfs4_exception exception = { };
2825 int err;
2826 do {
2827 err = nfs4_handle_exception(NFS_SERVER(inode),
2828 _nfs4_proc_access(inode, entry),
2829 &exception);
2830 } while (exception.retry);
2831 return err;
2832}
2833
2834/*
2835 * TODO: For the time being, we don't try to get any attributes
2836 * along with any of the zero-copy operations READ, READDIR,
2837 * READLINK, WRITE.
2838 *
2839 * In the case of the first three, we want to put the GETATTR
2840 * after the read-type operation -- this is because it is hard
2841 * to predict the length of a GETATTR response in v4, and thus
2842 * align the READ data correctly. This means that the GETATTR
2843 * may end up partially falling into the page cache, and we should
2844 * shift it into the 'tail' of the xdr_buf before processing.
2845 * To do this efficiently, we need to know the total length
2846 * of data received, which doesn't seem to be available outside
2847 * of the RPC layer.
2848 *
2849 * In the case of WRITE, we also want to put the GETATTR after
2850 * the operation -- in this case because we want to make sure
140150db 2851 * we get the post-operation mtime and size.
1da177e4
LT		 2852 *
2853 * Both of these changes to the XDR layer would in fact be quite
2854 * minor, but I decided to leave them for a subsequent patch.
2855 */
2856static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2857 unsigned int pgbase, unsigned int pglen)
2858{
2859 struct nfs4_readlink args = {
2860 .fh = NFS_FH(inode),
2861 .pgbase = pgbase,
2862 .pglen = pglen,
2863 .pages = &page,
2864 };
f50c7000 2865 struct nfs4_readlink_res res;
1da177e4
LT		 2866 struct rpc_message msg = {
2867 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2868 .rpc_argp = &args,
f50c7000 2869 .rpc_resp = &res,
1da177e4
LT		 2870 };
2871
7c513058 2872 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2873}
2874
2875static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2876 unsigned int pgbase, unsigned int pglen)
2877{
2878 struct nfs4_exception exception = { };
2879 int err;
2880 do {
2881 err = nfs4_handle_exception(NFS_SERVER(inode),
2882 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2883 &exception);
2884 } while (exception.retry);
2885 return err;
2886}
2887
1da177e4 2888/*
8867fe58 2889 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2890 */
1da177e4
LT		 2891static int
2892nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2893 int flags)
1da177e4 2894{
8867fe58 2895 struct nfs_open_context *ctx;
1da177e4 2896 struct nfs4_state *state;
1da177e4
LT		 2897 int status = 0;
2898
8867fe58
MS		 2899 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2900 if (IS_ERR(ctx))
2901 return PTR_ERR(ctx);
2902
a8a5da99 2903 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 2904 state = nfs4_do_open(dir, dentry, ctx->mode,
2905 flags, sattr, ctx->cred,
2906 &ctx->mdsthreshold);
d4d9cdcb 2907 d_drop(dentry);
1da177e4
LT		 2908 if (IS_ERR(state)) {
2909 status = PTR_ERR(state);
c0204fd2 2910 goto out;
1da177e4 2911 }
d4d9cdcb 2912 d_add(dentry, igrab(state->inode));
d75340cc 2913 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 2914 ctx->state = state;
1da177e4 2915out:
8867fe58 2916 put_nfs_open_context(ctx);
1da177e4
LT		 2917 return status;
2918}
2919
2920static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2921{
16e42959 2922 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2923 struct nfs_removeargs args = {
1da177e4 2924 .fh = NFS_FH(dir),
26fe5750 2925 .name = *name,
16e42959 2926 };
4fdc17b2 2927 struct nfs_removeres res = {
16e42959 2928 .server = server,
1da177e4 2929 };
1da177e4 2930 struct rpc_message msg = {
4fdc17b2
TM		 2931 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2932 .rpc_argp = &args,
2933 .rpc_resp = &res,
1da177e4 2934 };
778d2817 2935 int status;
1da177e4 2936
7c513058 2937 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 2938 if (status == 0)
16e42959 2939 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 2940 return status;
2941}
2942
2943static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2944{
2945 struct nfs4_exception exception = { };
2946 int err;
2947 do {
2948 err = nfs4_handle_exception(NFS_SERVER(dir),
2949 _nfs4_proc_remove(dir, name),
2950 &exception);
2951 } while (exception.retry);
2952 return err;
2953}
2954
e4eff1a6 2955static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2956{
e4eff1a6
TM		 2957 struct nfs_server *server = NFS_SERVER(dir);
2958 struct nfs_removeargs *args = msg->rpc_argp;
2959 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2960
e4eff1a6 2961 res->server = server;
1da177e4 2962 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 2963 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 2964}
2965
34e137cc
BS		 2966static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2967{
d9afbd1b
TM		 2968 nfs4_setup_sequence(NFS_SERVER(data->dir),
2969 &data->args.seq_args,
2970 &data->res.seq_res,
2971 task);
1da177e4
LT		 2972}
2973
e4eff1a6 2974static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2975{
e4eff1a6
TM		 2976 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2977
14516c3a
TM		 2978 if (!nfs4_sequence_done(task, &res->seq_res))
2979 return 0;
9e33bed5 2980 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2981 return 0;
2982 update_changeattr(dir, &res->cinfo);
e4eff1a6 2983 return 1;
1da177e4
LT		 2984}
2985
d3d4152a
JL		 2986static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2987{
2988 struct nfs_server *server = NFS_SERVER(dir);
2989 struct nfs_renameargs *arg = msg->rpc_argp;
2990 struct nfs_renameres *res = msg->rpc_resp;
2991
2992 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 2993 res->server = server;
9d12b216 2994 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 2995}
2996
c6bfa1a1
BS		 2997static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2998{
d9afbd1b
TM		 2999 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3000 &data->args.seq_args,
3001 &data->res.seq_res,
3002 task);
d3d4152a
JL		 3003}
3004
3005static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3006 struct inode *new_dir)
3007{
3008 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3009
3010 if (!nfs4_sequence_done(task, &res->seq_res))
3011 return 0;
3012 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3013 return 0;
3014
3015 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3016 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3017 return 1;
3018}
3019
1da177e4
LT		 3020static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3021 struct inode *new_dir, struct qstr *new_name)
3022{
6caf2c82 3023 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3024 struct nfs_renameargs arg = {
1da177e4
LT		 3025 .old_dir = NFS_FH(old_dir),
3026 .new_dir = NFS_FH(new_dir),
3027 .old_name = old_name,
3028 .new_name = new_name,
6caf2c82 3029 };
e8582a8b 3030 struct nfs_renameres res = {
6caf2c82 3031 .server = server,
1da177e4 3032 };
1da177e4
LT		 3033 struct rpc_message msg = {
3034 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3035 .rpc_argp = &arg,
3036 .rpc_resp = &res,
3037 };
011fff72 3038 int status = -ENOMEM;
1da177e4 3039
7c513058 3040 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3041 if (!status) {
3042 update_changeattr(old_dir, &res.old_cinfo);
3043 update_changeattr(new_dir, &res.new_cinfo);
3044 }
3045 return status;
3046}
3047
3048static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3049 struct inode *new_dir, struct qstr *new_name)
3050{
3051 struct nfs4_exception exception = { };
3052 int err;
3053 do {
3054 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3055 _nfs4_proc_rename(old_dir, old_name,
3056 new_dir, new_name),
3057 &exception);
3058 } while (exception.retry);
3059 return err;
3060}
3061
3062static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3063{
91ba2eee 3064 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3065 struct nfs4_link_arg arg = {
3066 .fh = NFS_FH(inode),
3067 .dir_fh = NFS_FH(dir),
3068 .name = name,
91ba2eee
TM		 3069 .bitmask = server->attr_bitmask,
3070 };
91ba2eee
TM		 3071 struct nfs4_link_res res = {
3072 .server = server,
1da177e4 3073 };
1da177e4
LT		 3074 struct rpc_message msg = {
3075 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3076 .rpc_argp = &arg,
91ba2eee 3077 .rpc_resp = &res,
1da177e4 3078 };
136f2627
TM		 3079 int status = -ENOMEM;
3080
3081 res.fattr = nfs_alloc_fattr();
778d2817 3082 if (res.fattr == NULL)
136f2627 3083 goto out;
1da177e4 3084
7c513058 3085 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3086 if (!status) {
3087 update_changeattr(dir, &res.cinfo);
73a3d07c 3088 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3089 }
136f2627 3090out:
136f2627 3091 nfs_free_fattr(res.fattr);
1da177e4
LT		 3092 return status;
3093}
3094
3095static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3096{
3097 struct nfs4_exception exception = { };
3098 int err;
3099 do {
3100 err = nfs4_handle_exception(NFS_SERVER(inode),
3101 _nfs4_proc_link(inode, dir, name),
3102 &exception);
3103 } while (exception.retry);
3104 return err;
3105}
3106
57dc9a57
TM		 3107struct nfs4_createdata {
3108 struct rpc_message msg;
3109 struct nfs4_create_arg arg;
3110 struct nfs4_create_res res;
3111 struct nfs_fh fh;
3112 struct nfs_fattr fattr;
57dc9a57
TM		 3113};
3114
3115static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3116 struct qstr *name, struct iattr *sattr, u32 ftype)
3117{
3118 struct nfs4_createdata *data;
3119
3120 data = kzalloc(sizeof(*data), GFP_KERNEL);
3121 if (data != NULL) {
3122 struct nfs_server *server = NFS_SERVER(dir);
3123
3124 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3125 data->msg.rpc_argp = &data->arg;
3126 data->msg.rpc_resp = &data->res;
3127 data->arg.dir_fh = NFS_FH(dir);
3128 data->arg.server = server;
3129 data->arg.name = name;
3130 data->arg.attrs = sattr;
3131 data->arg.ftype = ftype;
3132 data->arg.bitmask = server->attr_bitmask;
3133 data->res.server = server;
3134 data->res.fh = &data->fh;
3135 data->res.fattr = &data->fattr;
57dc9a57 3136 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3137 }
3138 return data;
3139}
3140
3141static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3142{
7c513058 3143 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3144 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3145 if (status == 0) {
3146 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3147 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3148 }
3149 return status;
3150}
3151
3152static void nfs4_free_createdata(struct nfs4_createdata *data)
3153{
3154 kfree(data);
3155}
3156
4f390c15 3157static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3158 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3159{
57dc9a57
TM		 3160 struct nfs4_createdata *data;
3161 int status = -ENAMETOOLONG;
1da177e4 3162
94a6d753 3163 if (len > NFS4_MAXPATHLEN)
57dc9a57 3164 goto out;
4f390c15 3165
57dc9a57
TM		 3166 status = -ENOMEM;
3167 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3168 if (data == NULL)
3169 goto out;
3170
3171 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3172 data->arg.u.symlink.pages = &page;
3173 data->arg.u.symlink.len = len;
1da177e4 3174
57dc9a57
TM		 3175 status = nfs4_do_create(dir, dentry, data);
3176
3177 nfs4_free_createdata(data);
3178out:
1da177e4
LT		 3179 return status;
3180}
3181
4f390c15 3182static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3183 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3184{
3185 struct nfs4_exception exception = { };
3186 int err;
3187 do {
3188 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3189 _nfs4_proc_symlink(dir, dentry, page,
3190 len, sattr),
1da177e4
LT		 3191 &exception);
3192 } while (exception.retry);
3193 return err;
3194}
3195
3196static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3197 struct iattr *sattr)
3198{
57dc9a57
TM		 3199 struct nfs4_createdata *data;
3200 int status = -ENOMEM;
1da177e4 3201
57dc9a57
TM		 3202 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3203 if (data == NULL)
3204 goto out;
3205
3206 status = nfs4_do_create(dir, dentry, data);
3207
3208 nfs4_free_createdata(data);
3209out:
1da177e4
LT		 3210 return status;
3211}
3212
3213static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3214 struct iattr *sattr)
3215{
3216 struct nfs4_exception exception = { };
3217 int err;
a8a5da99
AK		 3218
3219 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3220 do {
3221 err = nfs4_handle_exception(NFS_SERVER(dir),
3222 _nfs4_proc_mkdir(dir, dentry, sattr),
3223 &exception);
3224 } while (exception.retry);
3225 return err;
3226}
3227
3228static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3229 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3230{
3231 struct inode *dir = dentry->d_inode;
3232 struct nfs4_readdir_arg args = {
3233 .fh = NFS_FH(dir),
56e4ebf8 3234 .pages = pages,
1da177e4
LT		 3235 .pgbase = 0,
3236 .count = count,
96d25e53 3237 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3238 .plus = plus,
1da177e4
LT		 3239 };
3240 struct nfs4_readdir_res res;
3241 struct rpc_message msg = {
3242 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3243 .rpc_argp = &args,
3244 .rpc_resp = &res,
3245 .rpc_cred = cred,
3246 };
3247 int status;
3248
3110ff80 3249 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3250 dentry->d_parent->d_name.name,
3251 dentry->d_name.name,
3252 (unsigned long long)cookie);
c3f52af3 3253 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3254 res.pgbase = args.pgbase;
7c513058 3255 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3256 if (status >= 0) {
c3f52af3 3257 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3258 status += args.pgbase;
3259 }
c4812998
TM		 3260
3261 nfs_invalidate_atime(dir);
3262
3110ff80 3263 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3264 return status;
3265}
3266
3267static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3268 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3269{
3270 struct nfs4_exception exception = { };
3271 int err;
3272 do {
3273 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3274 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3275 pages, count, plus),
1da177e4
LT		 3276 &exception);
3277 } while (exception.retry);
3278 return err;
3279}
3280
3281static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3282 struct iattr *sattr, dev_t rdev)
3283{
57dc9a57
TM		 3284 struct nfs4_createdata *data;
3285 int mode = sattr->ia_mode;
3286 int status = -ENOMEM;
1da177e4 3287
57dc9a57
TM		 3288 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3289 if (data == NULL)
3290 goto out;
3291
1da177e4 3292 if (S_ISFIFO(mode))
57dc9a57 3293 data->arg.ftype = NF4FIFO;
1da177e4 3294 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3295 data->arg.ftype = NF4BLK;
3296 data->arg.u.device.specdata1 = MAJOR(rdev);
3297 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3298 }
3299 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3300 data->arg.ftype = NF4CHR;
3301 data->arg.u.device.specdata1 = MAJOR(rdev);
3302 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3303 } else if (!S_ISSOCK(mode)) {
3304 status = -EINVAL;
3305 goto out_free;
1da177e4 3306 }
1da177e4 3307
57dc9a57 3308 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3309out_free:
57dc9a57
TM		 3310 nfs4_free_createdata(data);
3311out:
1da177e4
LT		 3312 return status;
3313}
3314
3315static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3316 struct iattr *sattr, dev_t rdev)
3317{
3318 struct nfs4_exception exception = { };
3319 int err;
a8a5da99
AK		 3320
3321 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3322 do {
3323 err = nfs4_handle_exception(NFS_SERVER(dir),
3324 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3325 &exception);
3326 } while (exception.retry);
3327 return err;
3328}
3329
3330static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3331 struct nfs_fsstat *fsstat)
3332{
3333 struct nfs4_statfs_arg args = {
3334 .fh = fhandle,
3335 .bitmask = server->attr_bitmask,
3336 };
24ad148a
BH		 3337 struct nfs4_statfs_res res = {
3338 .fsstat = fsstat,
3339 };
1da177e4
LT		 3340 struct rpc_message msg = {
3341 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3342 .rpc_argp = &args,
24ad148a 3343 .rpc_resp = &res,
1da177e4
LT		 3344 };
3345
0e574af1 3346 nfs_fattr_init(fsstat->fattr);
7c513058 3347 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3348}
3349
3350static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3351{
3352 struct nfs4_exception exception = { };
3353 int err;
3354 do {
3355 err = nfs4_handle_exception(server,
3356 _nfs4_proc_statfs(server, fhandle, fsstat),
3357 &exception);
3358 } while (exception.retry);
3359 return err;
3360}
3361
3362static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3363 struct nfs_fsinfo *fsinfo)
3364{
3365 struct nfs4_fsinfo_arg args = {
3366 .fh = fhandle,
3367 .bitmask = server->attr_bitmask,
3368 };
3dda5e43
BH		 3369 struct nfs4_fsinfo_res res = {
3370 .fsinfo = fsinfo,
3371 };
1da177e4
LT		 3372 struct rpc_message msg = {
3373 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3374 .rpc_argp = &args,
3dda5e43 3375 .rpc_resp = &res,
1da177e4
LT		 3376 };
3377
7c513058 3378 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3379}
3380
3381static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3382{
3383 struct nfs4_exception exception = { };
3384 int err;
3385
3386 do {
3387 err = nfs4_handle_exception(server,
3388 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3389 &exception);
3390 } while (exception.retry);
3391 return err;
3392}
3393
3394static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3395{
e38eb650
BS		 3396 int error;
3397
0e574af1 3398 nfs_fattr_init(fsinfo->fattr);
e38eb650 3399 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3400 if (error == 0) {
3401 /* block layout checks this! */
3402 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3403 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3404 }
e38eb650
BS		 3405
3406 return error;
1da177e4
LT		 3407}
3408
3409static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3410 struct nfs_pathconf *pathconf)
3411{
3412 struct nfs4_pathconf_arg args = {
3413 .fh = fhandle,
3414 .bitmask = server->attr_bitmask,
3415 };
d45b2989
BH		 3416 struct nfs4_pathconf_res res = {
3417 .pathconf = pathconf,
3418 };
1da177e4
LT		 3419 struct rpc_message msg = {
3420 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3421 .rpc_argp = &args,
d45b2989 3422 .rpc_resp = &res,
1da177e4
LT		 3423 };
3424
3425 /* None of the pathconf attributes are mandatory to implement */
3426 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3427 memset(pathconf, 0, sizeof(*pathconf));
3428 return 0;
3429 }
3430
0e574af1 3431 nfs_fattr_init(pathconf->fattr);
7c513058 3432 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3433}
3434
3435static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3436 struct nfs_pathconf *pathconf)
3437{
3438 struct nfs4_exception exception = { };
3439 int err;
3440
3441 do {
3442 err = nfs4_handle_exception(server,
3443 _nfs4_proc_pathconf(server, fhandle, pathconf),
3444 &exception);
3445 } while (exception.retry);
3446 return err;
3447}
3448
d20581aa
BH		 3449void __nfs4_read_done_cb(struct nfs_read_data *data)
3450{
cd841605 3451 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3452}
3453
cbdabc7f 3454static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3455{
cd841605 3456 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3457
9e33bed5 3458 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3459 rpc_restart_call_prepare(task);
ec06c096 3460 return -EAGAIN;
1da177e4 3461 }
8850df99 3462
d20581aa 3463 __nfs4_read_done_cb(data);
1da177e4 3464 if (task->tk_status > 0)
ec06c096
TM		 3465 renew_lease(server, data->timestamp);
3466 return 0;
1da177e4
LT		 3467}
3468
cbdabc7f
AA		 3469static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3470{
3471
3472 dprintk("--> %s\n", __func__);
3473
3474 if (!nfs4_sequence_done(task, &data->res.seq_res))
3475 return -EAGAIN;
3476
d20581aa
BH		 3477 return data->read_done_cb ? data->read_done_cb(task, data) :
3478 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3479}
3480
bdc7f021 3481static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3482{
1da177e4 3483 data->timestamp = jiffies;
cbdabc7f 3484 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3485 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3486 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3487}
3488
ea7c3303
BS		 3489static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3490{
d9afbd1b
TM		 3491 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3492 &data->args.seq_args,
3493 &data->res.seq_res,
3494 task);
1da177e4
LT		 3495}
3496
b029bc9b 3497static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3498{
cd841605 3499 struct inode *inode = data->header->inode;
1da177e4 3500
9e33bed5 3501 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3502 rpc_restart_call_prepare(task);
788e7a89 3503 return -EAGAIN;
1da177e4 3504 }
4f9838c7 3505 if (task->tk_status >= 0) {
1da177e4 3506 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3507 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3508 }
788e7a89 3509 return 0;
1da177e4
LT		 3510}
3511
b029bc9b
FI		 3512static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3513{
3514 if (!nfs4_sequence_done(task, &data->res.seq_res))
3515 return -EAGAIN;
d20581aa
BH		 3516 return data->write_done_cb ? data->write_done_cb(task, data) :
3517 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3518}
3519
5a37f851
TM		 3520static
3521bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3522{
5a37f851
TM		 3523 const struct nfs_pgio_header *hdr = data->header;
3524
3525 /* Don't request attributes for pNFS or O_DIRECT writes */
3526 if (data->ds_clp != NULL || hdr->dreq != NULL)
3527 return false;
3528 /* Otherwise, request attributes if and only if we don't hold
3529 * a delegation
3530 */
011e2a7f 3531 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3532}
a69aef14 3533
bdc7f021 3534static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3535{
cd841605 3536 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3537
5a37f851 3538 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3539 data->args.bitmask = NULL;
3540 data->res.fattr = NULL;
3541 } else
3542 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3543
b029bc9b
FI		 3544 if (!data->write_done_cb)
3545 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3546 data->res.server = server;
1da177e4
LT		 3547 data->timestamp = jiffies;
3548
bdc7f021 3549 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3550 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3551}
3552
c6cb80d0
BS		 3553static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3554{
d9afbd1b
TM		 3555 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3556 &data->args.seq_args,
3557 &data->res.seq_res,
3558 task);
1da177e4
LT		 3559}
3560
0b7c0153 3561static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3562{
d9afbd1b
TM		 3563 nfs4_setup_sequence(NFS_SERVER(data->inode),
3564 &data->args.seq_args,
3565 &data->res.seq_res,
3566 task);
1da177e4
LT		 3567}
3568
0b7c0153 3569static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3570{
1da177e4 3571 struct inode *inode = data->inode;
14516c3a 3572
9e33bed5 3573 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3574 rpc_restart_call_prepare(task);
788e7a89 3575 return -EAGAIN;
1da177e4 3576 }
788e7a89 3577 return 0;
1da177e4
LT		 3578}
3579
0b7c0153 3580static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3581{
3582 if (!nfs4_sequence_done(task, &data->res.seq_res))
3583 return -EAGAIN;
0b7c0153 3584 return data->commit_done_cb(task, data);
5f452431
FI		 3585}
3586
0b7c0153 3587static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3588{
788e7a89 3589 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3590
0b7c0153
FI		 3591 if (data->commit_done_cb == NULL)
3592 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3593 data->res.server = server;
bdc7f021 3594 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3595 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3596}
3597
9bc4e3ca
CL		 3598struct nfs4_renewdata {
3599 struct nfs_client *client;
3600 unsigned long timestamp;
3601};
3602
1da177e4
LT		 3603/*
3604 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3605 * standalone procedure for queueing an asynchronous RENEW.
3606 */
9bc4e3ca 3607static void nfs4_renew_release(void *calldata)
dc96aef9 3608{
9bc4e3ca
CL		 3609 struct nfs4_renewdata *data = calldata;
3610 struct nfs_client *clp = data->client;
dc96aef9 3611
0851de06
AB		 3612 if (atomic_read(&clp->cl_count) > 1)
3613 nfs4_schedule_state_renewal(clp);
3614 nfs_put_client(clp);
9bc4e3ca 3615 kfree(data);
dc96aef9
AB		 3616}
3617
9bc4e3ca 3618static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3619{
9bc4e3ca
CL		 3620 struct nfs4_renewdata *data = calldata;
3621 struct nfs_client *clp = data->client;
3622 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3623
3624 if (task->tk_status < 0) {
95baa25c 3625 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3626 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3627 return;
3628 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3629 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3630 return;
3631 }
3632 nfs4_schedule_path_down_recovery(clp);
1da177e4 3633 }
452e9352 3634 do_renew_lease(clp, timestamp);
1da177e4
LT		 3635}
3636
963d8fe5
TM		 3637static const struct rpc_call_ops nfs4_renew_ops = {
3638 .rpc_call_done = nfs4_renew_done,
dc96aef9 3639 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3640};
3641
2f60ea6b 3642static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3643{
3644 struct rpc_message msg = {
3645 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3646 .rpc_argp = clp,
b4454fe1 3647 .rpc_cred = cred,
1da177e4 3648 };
9bc4e3ca 3649 struct nfs4_renewdata *data;
1da177e4 3650
2f60ea6b
TM		 3651 if (renew_flags == 0)
3652 return 0;
0851de06
AB		 3653 if (!atomic_inc_not_zero(&clp->cl_count))
3654 return -EIO;
b569ad34 3655 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3656 if (data == NULL)
3657 return -ENOMEM;
3658 data->client = clp;
3659 data->timestamp = jiffies;
1da177e4 3660 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3661 &nfs4_renew_ops, data);
1da177e4
LT		 3662}
3663
8534d4ec 3664static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3665{
3666 struct rpc_message msg = {
3667 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3668 .rpc_argp = clp,
b4454fe1 3669 .rpc_cred = cred,
1da177e4
LT		 3670 };
3671 unsigned long now = jiffies;
3672 int status;
3673
3674 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3675 if (status < 0)
3676 return status;
452e9352 3677 do_renew_lease(clp, now);
1da177e4
LT		 3678 return 0;
3679}
3680
aa1870af
BF		 3681static inline int nfs4_server_supports_acls(struct nfs_server *server)
3682{
3683 return (server->caps & NFS_CAP_ACLS)
3684 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3685 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3686}
3687
21f498c2
TM		 3688/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3689 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3690 * the stack.
3691 */
21f498c2 3692#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3693
e9e3d724
NH		 3694static int buf_to_pages_noslab(const void *buf, size_t buflen,
3695 struct page **pages, unsigned int *pgbase)
3696{
3697 struct page *newpage, **spages;
3698 int rc = 0;
3699 size_t len;
3700 spages = pages;
3701
3702 do {
21f498c2 3703 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3704 newpage = alloc_page(GFP_KERNEL);
3705
3706 if (newpage == NULL)
3707 goto unwind;
3708 memcpy(page_address(newpage), buf, len);
3709 buf += len;
3710 buflen -= len;
3711 *pages++ = newpage;
3712 rc++;
3713 } while (buflen != 0);
3714
3715 return rc;
3716
3717unwind:
3718 for(; rc > 0; rc--)
3719 __free_page(spages[rc-1]);
3720 return -ENOMEM;
3721}
3722
e50a1c2e
BF		 3723struct nfs4_cached_acl {
3724 int cached;
3725 size_t len;
3e9d4154 3726 char data[0];
e50a1c2e
BF		 3727};
3728
3729static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3730{
3731 struct nfs_inode *nfsi = NFS_I(inode);
3732
3733 spin_lock(&inode->i_lock);
3734 kfree(nfsi->nfs4_acl);
3735 nfsi->nfs4_acl = acl;
3736 spin_unlock(&inode->i_lock);
3737}
3738
3739static void nfs4_zap_acl_attr(struct inode *inode)
3740{
3741 nfs4_set_cached_acl(inode, NULL);
3742}
3743
3744static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3745{
3746 struct nfs_inode *nfsi = NFS_I(inode);
3747 struct nfs4_cached_acl *acl;
3748 int ret = -ENOENT;
3749
3750 spin_lock(&inode->i_lock);
3751 acl = nfsi->nfs4_acl;
3752 if (acl == NULL)
3753 goto out;
3754 if (buf == NULL) /* user is just asking for length */
3755 goto out_len;
3756 if (acl->cached == 0)
3757 goto out;
3758 ret = -ERANGE; /* see getxattr(2) man page */
3759 if (acl->len > buflen)
3760 goto out;
3761 memcpy(buf, acl->data, acl->len);
3762out_len:
3763 ret = acl->len;
3764out:
3765 spin_unlock(&inode->i_lock);
3766 return ret;
3767}
3768
5794d21e 3769static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3770{
3771 struct nfs4_cached_acl *acl;
b291f1b1 3772 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3773
1f1ea6c2 3774 if (buflen <= PAGE_SIZE) {
b291f1b1 3775 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3776 if (acl == NULL)
3777 goto out;
3778 acl->cached = 1;
5794d21e 3779 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3780 } else {
3781 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3782 if (acl == NULL)
3783 goto out;
3784 acl->cached = 0;
3785 }
3786 acl->len = acl_len;
3787out:
3788 nfs4_set_cached_acl(inode, acl);
3789}
3790
bf118a34
AA		 3791/*
3792 * The getxattr API returns the required buffer length when called with a
3793 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3794 * the required buf. On a NULL buf, we send a page of data to the server
3795 * guessing that the ACL request can be serviced by a page. If so, we cache
3796 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3797 * the cache. If not so, we throw away the page, and cache the required
3798 * length. The next getxattr call will then produce another round trip to
3799 * the server, this time with the input buf of the required size.
3800 */
16b4289c 3801static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3802{
bf118a34 3803 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3804 struct nfs_getaclargs args = {
3805 .fh = NFS_FH(inode),
3806 .acl_pages = pages,
3807 .acl_len = buflen,
3808 };
663c79b3
BH		 3809 struct nfs_getaclres res = {
3810 .acl_len = buflen,
3811 };
aa1870af
BF		 3812 struct rpc_message msg = {
3813 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3814 .rpc_argp = &args,
663c79b3 3815 .rpc_resp = &res,
aa1870af 3816 };
21f498c2
TM		 3817 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3818 int ret = -ENOMEM, i;
aa1870af 3819
bf118a34
AA		 3820 /* As long as we're doing a round trip to the server anyway,
3821 * let's be prepared for a page of acl data. */
3822 if (npages == 0)
3823 npages = 1;
21f498c2
TM		 3824 if (npages > ARRAY_SIZE(pages))
3825 return -ERANGE;
5a006899 3826
bf118a34
AA		 3827 for (i = 0; i < npages; i++) {
3828 pages[i] = alloc_page(GFP_KERNEL);
3829 if (!pages[i])
3830 goto out_free;
e50a1c2e 3831 }
5a006899
SP		 3832
3833 /* for decoding across pages */
3834 res.acl_scratch = alloc_page(GFP_KERNEL);
3835 if (!res.acl_scratch)
3836 goto out_free;
3837
bf118a34
AA		 3838 args.acl_len = npages * PAGE_SIZE;
3839 args.acl_pgbase = 0;
5a006899 3840
de040bec 3841 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3842 __func__, buf, buflen, npages, args.acl_len);
3843 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3844 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3845 if (ret)
3846 goto out_free;
bf118a34 3847
1f1ea6c2
TM		 3848 /* Handle the case where the passed-in buffer is too short */
3849 if (res.acl_flags & NFS4_ACL_TRUNC) {
3850 /* Did the user only issue a request for the acl length? */
3851 if (buf == NULL)
3852 goto out_ok;
e50a1c2e 3853 ret = -ERANGE;
1f1ea6c2 3854 goto out_free;
e50a1c2e 3855 }
1f1ea6c2 3856 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 3857 if (buf) {
3858 if (res.acl_len > buflen) {
3859 ret = -ERANGE;
3860 goto out_free;
3861 }
1f1ea6c2 3862 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 3863 }
1f1ea6c2
TM		 3864out_ok:
3865 ret = res.acl_len;
e50a1c2e 3866out_free:
bf118a34
AA		 3867 for (i = 0; i < npages; i++)
3868 if (pages[i])
3869 __free_page(pages[i]);
331818f1
TM		 3870 if (res.acl_scratch)
3871 __free_page(res.acl_scratch);
aa1870af
BF		 3872 return ret;
3873}
3874
16b4289c
TM		 3875static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3876{
3877 struct nfs4_exception exception = { };
3878 ssize_t ret;
3879 do {
3880 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3881 if (ret >= 0)
3882 break;
3883 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3884 } while (exception.retry);
3885 return ret;
3886}
3887
e50a1c2e
BF		 3888static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3889{
3890 struct nfs_server *server = NFS_SERVER(inode);
3891 int ret;
3892
3893 if (!nfs4_server_supports_acls(server))
3894 return -EOPNOTSUPP;
3895 ret = nfs_revalidate_inode(server, inode);
3896 if (ret < 0)
3897 return ret;
08a22b39
AK		 3898 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3899 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3900 ret = nfs4_read_cached_acl(inode, buf, buflen);
3901 if (ret != -ENOENT)
bf118a34
AA		 3902 /* -ENOENT is returned if there is no ACL or if there is an ACL
3903 * but no cached acl data, just the acl length */
e50a1c2e
BF		 3904 return ret;
3905 return nfs4_get_acl_uncached(inode, buf, buflen);
3906}
3907
16b4289c 3908static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3909{
3910 struct nfs_server *server = NFS_SERVER(inode);
3911 struct page *pages[NFS4ACL_MAXPAGES];
3912 struct nfs_setaclargs arg = {
3913 .fh = NFS_FH(inode),
3914 .acl_pages = pages,
3915 .acl_len = buflen,
3916 };
73c403a9 3917 struct nfs_setaclres res;
4b580ee3
BF		 3918 struct rpc_message msg = {
3919 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3920 .rpc_argp = &arg,
73c403a9 3921 .rpc_resp = &res,
4b580ee3 3922 };
21f498c2 3923 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 3924 int ret, i;
4b580ee3
BF		 3925
3926 if (!nfs4_server_supports_acls(server))
3927 return -EOPNOTSUPP;
21f498c2
TM		 3928 if (npages > ARRAY_SIZE(pages))
3929 return -ERANGE;
e9e3d724
NH		 3930 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3931 if (i < 0)
3932 return i;
57ec14c5 3933 nfs4_inode_return_delegation(inode);
7c513058 3934 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3935
3936 /*
3937 * Free each page after tx, so the only ref left is
3938 * held by the network stack
3939 */
3940 for (; i > 0; i--)
3941 put_page(pages[i-1]);
3942
08a22b39
AK		 3943 /*
3944 * Acl update can result in inode attribute update.
3945 * so mark the attribute cache invalid.
3946 */
3947 spin_lock(&inode->i_lock);
3948 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3949 spin_unlock(&inode->i_lock);
f41f7418
TM		 3950 nfs_access_zap_cache(inode);
3951 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3952 return ret;
3953}
3954
16b4289c
TM		 3955static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3956{
3957 struct nfs4_exception exception = { };
3958 int err;
3959 do {
3960 err = nfs4_handle_exception(NFS_SERVER(inode),
3961 __nfs4_proc_set_acl(inode, buf, buflen),
3962 &exception);
3963 } while (exception.retry);
3964 return err;
3965}
3966
1da177e4 3967static int
aa5190d0 3968nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3969{
aa5190d0
TM		 3970 struct nfs_client *clp = server->nfs_client;
3971
3972 if (task->tk_status >= 0)
1da177e4
LT		 3973 return 0;
3974 switch(task->tk_status) {
a1d0b5ee 3975 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 3976 case -NFS4ERR_ADMIN_REVOKED:
3977 case -NFS4ERR_BAD_STATEID:
14977489
TM		 3978 if (state == NULL)
3979 break;
3980 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 3981 case -NFS4ERR_OPENMODE:
3982 if (state == NULL)
3983 break;
0400a6b0
TM		 3984 nfs4_schedule_stateid_recovery(server, state);
3985 goto wait_on_recovery;
0ced63d1
TM		 3986 case -NFS4ERR_EXPIRED:
3987 if (state != NULL)
3988 nfs4_schedule_stateid_recovery(server, state);
1da177e4 3989 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3990 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 3991 nfs4_schedule_lease_recovery(clp);
3992 goto wait_on_recovery;
4745e315
AA		 3993#if defined(CONFIG_NFS_V4_1)
3994 case -NFS4ERR_BADSESSION:
3995 case -NFS4ERR_BADSLOT:
3996 case -NFS4ERR_BAD_HIGH_SLOT:
3997 case -NFS4ERR_DEADSESSION:
3998 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3999 case -NFS4ERR_SEQ_FALSE_RETRY:
4000 case -NFS4ERR_SEQ_MISORDERED:
4001 dprintk("%s ERROR %d, Reset session\n", __func__,
4002 task->tk_status);
9f594791 4003 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4004 task->tk_status = 0;
4005 return -EAGAIN;
4006#endif /* CONFIG_NFS_V4_1 */
1da177e4 4007 case -NFS4ERR_DELAY:
aa5190d0 4008 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4009 case -NFS4ERR_GRACE:
1da177e4
LT		 4010 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4011 task->tk_status = 0;
4012 return -EAGAIN;
a8a4ae3a 4013 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4014 case -NFS4ERR_OLD_STATEID:
4015 task->tk_status = 0;
4016 return -EAGAIN;
4017 }
4018 task->tk_status = nfs4_map_errors(task->tk_status);
4019 return 0;
0400a6b0 4020wait_on_recovery:
a2c0b9e2 4021 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4022 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4023 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4024 task->tk_status = 0;
4025 return -EAGAIN;
1da177e4
LT		 4026}
4027
f092075d
CL		 4028static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4029 nfs4_verifier *bootverf)
cd93710e
CL		 4030{
4031 __be32 verf[2];
4032
2c820d9a
CL		 4033 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4034 /* An impossible timestamp guarantees this value
4035 * will never match a generated boot time. */
4036 verf[0] = 0;
4037 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4038 } else {
f092075d
CL		 4039 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4040 verf[0] = (__be32)nn->boot_time.tv_sec;
4041 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4042 }
cd93710e
CL		 4043 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4044}
4045
e984a55a
CL		 4046static unsigned int
4047nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4048 char *buf, size_t len)
4049{
4050 unsigned int result;
4051
4052 rcu_read_lock();
4053 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4054 clp->cl_ipaddr,
4055 rpc_peeraddr2str(clp->cl_rpcclient,
4056 RPC_DISPLAY_ADDR),
4057 rpc_peeraddr2str(clp->cl_rpcclient,
4058 RPC_DISPLAY_PROTO));
4059 rcu_read_unlock();
4060 return result;
4061}
4062
4063static unsigned int
4064nfs4_init_uniform_client_string(const struct nfs_client *clp,
4065 char *buf, size_t len)
4066{
6f2ea7f2
CL		 4067 char *nodename = clp->cl_rpcclient->cl_nodename;
4068
4069 if (nfs4_client_id_uniquifier[0] != '\0')
4070 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4071 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4072 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4073 nodename);
e984a55a
CL		 4074}
4075
6bbb4ae8
CL		 4076/**
4077 * nfs4_proc_setclientid - Negotiate client ID
4078 * @clp: state data structure
4079 * @program: RPC program for NFSv4 callback service
4080 * @port: IP port number for NFS4 callback service
4081 * @cred: RPC credential to use for this call
4082 * @res: where to place the result
4083 *
4084 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4085 */
bb8b27e5
TM		 4086int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4087 unsigned short port, struct rpc_cred *cred,
4088 struct nfs4_setclientid_res *res)
1da177e4
LT		 4089{
4090 nfs4_verifier sc_verifier;
4091 struct nfs4_setclientid setclientid = {
4092 .sc_verifier = &sc_verifier,
4093 .sc_prog = program,
f4eecd5d 4094 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4095 };
4096 struct rpc_message msg = {
4097 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4098 .rpc_argp = &setclientid,
bb8b27e5 4099 .rpc_resp = res,
286d7d6a 4100 .rpc_cred = cred,
1da177e4 4101 };
6bbb4ae8 4102 int status;
1da177e4 4103
de734831 4104 /* nfs_client_id4 */
f092075d 4105 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4106 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4107 setclientid.sc_name_len =
4108 nfs4_init_uniform_client_string(clp,
4109 setclientid.sc_name,
4110 sizeof(setclientid.sc_name));
4111 else
4112 setclientid.sc_name_len =
4113 nfs4_init_nonuniform_client_string(clp,
4114 setclientid.sc_name,
4115 sizeof(setclientid.sc_name));
de734831 4116 /* cb_client4 */
e984a55a 4117 rcu_read_lock();
de734831 4118 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4119 sizeof(setclientid.sc_netid),
4120 rpc_peeraddr2str(clp->cl_rpcclient,
4121 RPC_DISPLAY_NETID));
de734831
CL		 4122 rcu_read_unlock();
4123 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4124 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4125 clp->cl_ipaddr, port >> 8, port & 255);
4126
6bbb4ae8
CL		 4127 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4128 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4129 setclientid.sc_name_len, setclientid.sc_name);
4130 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4131 dprintk("NFS reply setclientid: %d\n", status);
4132 return status;
1da177e4
LT		 4133}
4134
6bbb4ae8
CL		 4135/**
4136 * nfs4_proc_setclientid_confirm - Confirm client ID
4137 * @clp: state data structure
4138 * @res: result of a previous SETCLIENTID
4139 * @cred: RPC credential to use for this call
4140 *
4141 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4142 */
fd954ae1 4143int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4144 struct nfs4_setclientid_res *arg,
4145 struct rpc_cred *cred)
1da177e4
LT		 4146{
4147 struct nfs_fsinfo fsinfo;
4148 struct rpc_message msg = {
4149 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4150 .rpc_argp = arg,
1da177e4 4151 .rpc_resp = &fsinfo,
286d7d6a 4152 .rpc_cred = cred,
1da177e4
LT		 4153 };
4154 unsigned long now;
4155 int status;
4156
6bbb4ae8
CL		 4157 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4158 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4159 clp->cl_clientid);
1da177e4 4160 now = jiffies;
1bd714f2 4161 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4162 if (status == 0) {
4163 spin_lock(&clp->cl_lock);
4164 clp->cl_lease_time = fsinfo.lease_time * HZ;
4165 clp->cl_last_renewal = now;
4166 spin_unlock(&clp->cl_lock);
4167 }
6bbb4ae8 4168 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4169 return status;
4170}
4171
fe650407
TM		 4172struct nfs4_delegreturndata {
4173 struct nfs4_delegreturnargs args;
fa178f29 4174 struct nfs4_delegreturnres res;
fe650407
TM		 4175 struct nfs_fh fh;
4176 nfs4_stateid stateid;
26e976a8 4177 unsigned long timestamp;
fa178f29 4178 struct nfs_fattr fattr;
fe650407
TM		 4179 int rpc_status;
4180};
4181
fe650407
TM		 4182static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4183{
4184 struct nfs4_delegreturndata *data = calldata;
938e1010 4185
14516c3a
TM		 4186 if (!nfs4_sequence_done(task, &data->res.seq_res))
4187 return;
938e1010 4188
79708861
RL		 4189 switch (task->tk_status) {
4190 case -NFS4ERR_STALE_STATEID:
4191 case -NFS4ERR_EXPIRED:
4192 case 0:
fa178f29 4193 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4194 break;
4195 default:
4196 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4197 -EAGAIN) {
d00c5d43 4198 rpc_restart_call_prepare(task);
79708861
RL		 4199 return;
4200 }
4201 }
4202 data->rpc_status = task->tk_status;
fe650407
TM		 4203}
4204
4205static void nfs4_delegreturn_release(void *calldata)
4206{
fe650407
TM		 4207 kfree(calldata);
4208}
4209
938e1010
AA		 4210#if defined(CONFIG_NFS_V4_1)
4211static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4212{
4213 struct nfs4_delegreturndata *d_data;
4214
4215 d_data = (struct nfs4_delegreturndata *)data;
4216
d9afbd1b
TM		 4217 nfs4_setup_sequence(d_data->res.server,
4218 &d_data->args.seq_args,
4219 &d_data->res.seq_res,
4220 task);
938e1010
AA		 4221}
4222#endif /* CONFIG_NFS_V4_1 */
4223
c8d149f3 4224static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4225#if defined(CONFIG_NFS_V4_1)
4226 .rpc_call_prepare = nfs4_delegreturn_prepare,
4227#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4228 .rpc_call_done = nfs4_delegreturn_done,
4229 .rpc_release = nfs4_delegreturn_release,
4230};
4231
e6f81075 4232static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4233{
4234 struct nfs4_delegreturndata *data;
fa178f29 4235 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4236 struct rpc_task *task;
5138fde0
TM		 4237 struct rpc_message msg = {
4238 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4239 .rpc_cred = cred,
4240 };
c970aa85
TM		 4241 struct rpc_task_setup task_setup_data = {
4242 .rpc_client = server->client,
5138fde0 4243 .rpc_message = &msg,
c970aa85
TM		 4244 .callback_ops = &nfs4_delegreturn_ops,
4245 .flags = RPC_TASK_ASYNC,
4246 };
e6f81075 4247 int status = 0;
fe650407 4248
8535b2be 4249 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4250 if (data == NULL)
4251 return -ENOMEM;
9d12b216 4252 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4253 data->args.fhandle = &data->fh;
4254 data->args.stateid = &data->stateid;
9e907fec 4255 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4256 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4257 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4258 data->res.fattr = &data->fattr;
4259 data->res.server = server;
5138fde0 4260 nfs_fattr_init(data->res.fattr);
26e976a8 4261 data->timestamp = jiffies;
fe650407
TM		 4262 data->rpc_status = 0;
4263
c970aa85 4264 task_setup_data.callback_data = data;
1174dd1f
TM		 4265 msg.rpc_argp = &data->args;
4266 msg.rpc_resp = &data->res;
c970aa85 4267 task = rpc_run_task(&task_setup_data);
7a1218a2 4268 if (IS_ERR(task))
fe650407 4269 return PTR_ERR(task);
e6f81075
TM		 4270 if (!issync)
4271 goto out;
fe650407 4272 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4273 if (status != 0)
4274 goto out;
4275 status = data->rpc_status;
e144cbcc
TM		 4276 if (status == 0)
4277 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4278 else
4279 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4280out:
e6b3c4db 4281 rpc_put_task(task);
fe650407 4282 return status;
1da177e4
LT		 4283}
4284
e6f81075 4285int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4286{
4287 struct nfs_server *server = NFS_SERVER(inode);
4288 struct nfs4_exception exception = { };
4289 int err;
4290 do {
e6f81075 4291 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4292 switch (err) {
4293 case -NFS4ERR_STALE_STATEID:
4294 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4295 case 0:
4296 return 0;
4297 }
4298 err = nfs4_handle_exception(server, err, &exception);
4299 } while (exception.retry);
4300 return err;
4301}
4302
4303#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4304#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4305
4306/*
4307 * sleep, with exponential backoff, and retry the LOCK operation.
4308 */
4309static unsigned long
4310nfs4_set_lock_task_retry(unsigned long timeout)
4311{
d310310c 4312 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4313 timeout <<= 1;
4314 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4315 return NFS4_LOCK_MAXTIMEOUT;
4316 return timeout;
4317}
4318
1da177e4
LT		 4319static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4320{
4321 struct inode *inode = state->inode;
4322 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4323 struct nfs_client *clp = server->nfs_client;
911d1aaf 4324 struct nfs_lockt_args arg = {
1da177e4 4325 .fh = NFS_FH(inode),
911d1aaf 4326 .fl = request,
1da177e4 4327 };
911d1aaf
TM		 4328 struct nfs_lockt_res res = {
4329 .denied = request,
1da177e4
LT		 4330 };
4331 struct rpc_message msg = {
4332 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4333 .rpc_argp = &arg,
4334 .rpc_resp = &res,
4335 .rpc_cred = state->owner->so_cred,
4336 };
1da177e4
LT		 4337 struct nfs4_lock_state *lsp;
4338 int status;
4339
911d1aaf 4340 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4341 status = nfs4_set_lock_state(state, request);
4342 if (status != 0)
4343 goto out;
4344 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4345 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4346 arg.lock_owner.s_dev = server->s_dev;
7c513058 4347 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4348 switch (status) {
4349 case 0:
4350 request->fl_type = F_UNLCK;
4351 break;
4352 case -NFS4ERR_DENIED:
4353 status = 0;
1da177e4 4354 }
70cc6487 4355 request->fl_ops->fl_release_private(request);
8d0a8a9d 4356out:
1da177e4
LT		 4357 return status;
4358}
4359
4360static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4361{
4362 struct nfs4_exception exception = { };
4363 int err;
4364
4365 do {
4366 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4367 _nfs4_proc_getlk(state, cmd, request),
4368 &exception);
4369 } while (exception.retry);
4370 return err;
4371}
4372
4373static int do_vfs_lock(struct file *file, struct file_lock *fl)
4374{
4375 int res = 0;
4376 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4377 case FL_POSIX:
4378 res = posix_lock_file_wait(file, fl);
4379 break;
4380 case FL_FLOCK:
4381 res = flock_lock_file_wait(file, fl);
4382 break;
4383 default:
4384 BUG();
4385 }
1da177e4
LT		 4386 return res;
4387}
4388
faf5f49c 4389struct nfs4_unlockdata {
911d1aaf
TM		 4390 struct nfs_locku_args arg;
4391 struct nfs_locku_res res;
faf5f49c
TM		 4392 struct nfs4_lock_state *lsp;
4393 struct nfs_open_context *ctx;
911d1aaf
TM		 4394 struct file_lock fl;
4395 const struct nfs_server *server;
26e976a8 4396 unsigned long timestamp;
faf5f49c
TM		 4397};
4398
911d1aaf
TM		 4399static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4400 struct nfs_open_context *ctx,
4401 struct nfs4_lock_state *lsp,
4402 struct nfs_seqid *seqid)
4403{
4404 struct nfs4_unlockdata *p;
4405 struct inode *inode = lsp->ls_state->inode;
4406
8535b2be 4407 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4408 if (p == NULL)
4409 return NULL;
4410 p->arg.fh = NFS_FH(inode);
4411 p->arg.fl = &p->fl;
4412 p->arg.seqid = seqid;
c1d51931 4413 p->res.seqid = seqid;
911d1aaf
TM		 4414 p->arg.stateid = &lsp->ls_stateid;
4415 p->lsp = lsp;
4416 atomic_inc(&lsp->ls_count);
4417 /* Ensure we don't close file until we're done freeing locks! */
4418 p->ctx = get_nfs_open_context(ctx);
4419 memcpy(&p->fl, fl, sizeof(p->fl));
4420 p->server = NFS_SERVER(inode);
4421 return p;
4422}
4423
06f814a3 4424static void nfs4_locku_release_calldata(void *data)
faf5f49c 4425{
963d8fe5 4426 struct nfs4_unlockdata *calldata = data;
911d1aaf 4427 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4428 nfs4_put_lock_state(calldata->lsp);
4429 put_nfs_open_context(calldata->ctx);
4430 kfree(calldata);
faf5f49c
TM		 4431}
4432
963d8fe5 4433static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4434{
963d8fe5 4435 struct nfs4_unlockdata *calldata = data;
faf5f49c 4436
14516c3a
TM		 4437 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4438 return;
faf5f49c
TM		 4439 switch (task->tk_status) {
4440 case 0:
f597c537
TM		 4441 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4442 &calldata->res.stateid);
26e976a8 4443 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4444 break;
9e33bed5
TM		 4445 case -NFS4ERR_BAD_STATEID:
4446 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4447 case -NFS4ERR_STALE_STATEID:
4448 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4449 break;
4450 default:
9e33bed5 4451 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4452 rpc_restart_call_prepare(task);
faf5f49c 4453 }
2b1bc308 4454 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4455}
4456
4ce70ada 4457static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4458{
4ce70ada 4459 struct nfs4_unlockdata *calldata = data;
faf5f49c 4460
911d1aaf 4461 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 4462 goto out_wait;
795a88c9 4463 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 4464 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 4465 goto out_no_action;
faf5f49c 4466 }
26e976a8 4467 calldata->timestamp = jiffies;
035168ab 4468 if (nfs4_setup_sequence(calldata->server,
a893693c 4469 &calldata->arg.seq_args,
2240a9e2
TM		 4470 &calldata->res.seq_res,
4471 task) != 0)
4472 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 4473 return;
4474out_no_action:
4475 task->tk_action = NULL;
4476out_wait:
4477 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4478}
4479
963d8fe5 4480static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4481 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4482 .rpc_call_done = nfs4_locku_done,
06f814a3 4483 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4484};
4485
a5d16a4d
TM		 4486static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4487 struct nfs_open_context *ctx,
4488 struct nfs4_lock_state *lsp,
4489 struct nfs_seqid *seqid)
4490{
4491 struct nfs4_unlockdata *data;
5138fde0
TM		 4492 struct rpc_message msg = {
4493 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4494 .rpc_cred = ctx->cred,
4495 };
c970aa85
TM		 4496 struct rpc_task_setup task_setup_data = {
4497 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4498 .rpc_message = &msg,
c970aa85 4499 .callback_ops = &nfs4_locku_ops,
101070ca 4500 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4501 .flags = RPC_TASK_ASYNC,
4502 };
a5d16a4d 4503
137d6aca
FF		 4504 /* Ensure this is an unlock - when canceling a lock, the
4505 * canceled lock is passed in, and it won't be an unlock.
4506 */
4507 fl->fl_type = F_UNLCK;
4508
a5d16a4d
TM		 4509 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4510 if (data == NULL) {
4511 nfs_free_seqid(seqid);
4512 return ERR_PTR(-ENOMEM);
4513 }
4514
9d12b216 4515 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4516 msg.rpc_argp = &data->arg;
4517 msg.rpc_resp = &data->res;
c970aa85
TM		 4518 task_setup_data.callback_data = data;
4519 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4520}
4521
faf5f49c
TM		 4522static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4523{
65b62a29
TM		 4524 struct inode *inode = state->inode;
4525 struct nfs4_state_owner *sp = state->owner;
4526 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 4527 struct nfs_seqid *seqid;
1da177e4 4528 struct nfs4_lock_state *lsp;
06f814a3
TM		 4529 struct rpc_task *task;
4530 int status = 0;
536ff0f8 4531 unsigned char fl_flags = request->fl_flags;
faf5f49c 4532
8d0a8a9d 4533 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4534 /* Unlock _before_ we do the RPC call */
4535 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 4536 /* Exclude nfs_delegation_claim_locks() */
4537 mutex_lock(&sp->so_delegreturn_mutex);
4538 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 4539 down_read(&nfsi->rwsem);
4540 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4541 up_read(&nfsi->rwsem);
65b62a29 4542 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 4543 goto out;
19e03c57
TM		 4544 }
4545 up_read(&nfsi->rwsem);
65b62a29 4546 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 4547 if (status != 0)
9b073574
TM		 4548 goto out;
4549 /* Is this a delegated lock? */
4550 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4551 goto out;
8d0a8a9d 4552 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4553 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4554 status = -ENOMEM;
911d1aaf 4555 if (seqid == NULL)
9b073574 4556 goto out;
cd3758e3 4557 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4558 status = PTR_ERR(task);
4559 if (IS_ERR(task))
9b073574 4560 goto out;
a5d16a4d 4561 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4562 rpc_put_task(task);
9b073574 4563out:
536ff0f8 4564 request->fl_flags = fl_flags;
1da177e4
LT		 4565 return status;
4566}
4567
a5d16a4d
TM		 4568struct nfs4_lockdata {
4569 struct nfs_lock_args arg;
4570 struct nfs_lock_res res;
4571 struct nfs4_lock_state *lsp;
4572 struct nfs_open_context *ctx;
4573 struct file_lock fl;
26e976a8 4574 unsigned long timestamp;
a5d16a4d
TM		 4575 int rpc_status;
4576 int cancelled;
66179efe 4577 struct nfs_server *server;
a5d16a4d
TM		 4578};
4579
4580static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4581 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4582 gfp_t gfp_mask)
1da177e4 4583{
a5d16a4d
TM		 4584 struct nfs4_lockdata *p;
4585 struct inode *inode = lsp->ls_state->inode;
1da177e4 4586 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4587
8535b2be 4588 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4589 if (p == NULL)
4590 return NULL;
4591
4592 p->arg.fh = NFS_FH(inode);
4593 p->arg.fl = &p->fl;
8535b2be 4594 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4595 if (p->arg.open_seqid == NULL)
4596 goto out_free;
8535b2be 4597 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4598 if (p->arg.lock_seqid == NULL)
2f74c0a0 4599 goto out_free_seqid;
a5d16a4d 4600 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4601 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4602 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4603 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4604 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4605 p->lsp = lsp;
66179efe 4606 p->server = server;
a5d16a4d
TM		 4607 atomic_inc(&lsp->ls_count);
4608 p->ctx = get_nfs_open_context(ctx);
4609 memcpy(&p->fl, fl, sizeof(p->fl));
4610 return p;
2f74c0a0
TM		 4611out_free_seqid:
4612 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4613out_free:
4614 kfree(p);
4615 return NULL;
4616}
4617
4618static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4619{
4620 struct nfs4_lockdata *data = calldata;
4621 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4622
3110ff80 4623 dprintk("%s: begin!\n", __func__);
2f74c0a0 4624 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 4625 goto out_wait;
a5d16a4d
TM		 4626 /* Do we need to do an open_to_lock_owner? */
4627 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4628 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4629 goto out_release_lock_seqid;
8fe72bac 4630 }
a5d16a4d
TM		 4631 data->arg.open_stateid = &state->stateid;
4632 data->arg.new_lock_owner = 1;
c1d51931 4633 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4634 } else
4635 data->arg.new_lock_owner = 0;
26e976a8 4636 data->timestamp = jiffies;
035168ab
TM		 4637 if (nfs4_setup_sequence(data->server,
4638 &data->arg.seq_args,
2240a9e2 4639 &data->res.seq_res,
d9afbd1b 4640 task) == 0)
66179efe 4641 return;
2240a9e2
TM		 4642 nfs_release_seqid(data->arg.open_seqid);
4643out_release_lock_seqid:
4644 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 4645out_wait:
4646 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 4647 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4648}
4649
a5d16a4d
TM		 4650static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4651{
4652 struct nfs4_lockdata *data = calldata;
4653
3110ff80 4654 dprintk("%s: begin!\n", __func__);
a5d16a4d 4655
14516c3a
TM		 4656 if (!nfs4_sequence_done(task, &data->res.seq_res))
4657 return;
66179efe 4658
a5d16a4d 4659 data->rpc_status = task->tk_status;
a5d16a4d 4660 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4661 if (data->rpc_status == 0)
4662 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4663 else
4664 goto out;
4665 }
4666 if (data->rpc_status == 0) {
f597c537 4667 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4668 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4669 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4670 }
a5d16a4d 4671out:
3110ff80 4672 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4673}
4674
4675static void nfs4_lock_release(void *calldata)
4676{
4677 struct nfs4_lockdata *data = calldata;
4678
3110ff80 4679 dprintk("%s: begin!\n", __func__);
2f74c0a0 4680 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4681 if (data->cancelled != 0) {
4682 struct rpc_task *task;
4683 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4684 data->arg.lock_seqid);
4685 if (!IS_ERR(task))
bf294b41 4686 rpc_put_task_async(task);
3110ff80 4687 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4688 } else
4689 nfs_free_seqid(data->arg.lock_seqid);
4690 nfs4_put_lock_state(data->lsp);
4691 put_nfs_open_context(data->ctx);
4692 kfree(data);
3110ff80 4693 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4694}
4695
4696static const struct rpc_call_ops nfs4_lock_ops = {
4697 .rpc_call_prepare = nfs4_lock_prepare,
4698 .rpc_call_done = nfs4_lock_done,
4699 .rpc_release = nfs4_lock_release,
4700};
4701
2bee72a6
TM		 4702static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4703{
2bee72a6
TM		 4704 switch (error) {
4705 case -NFS4ERR_ADMIN_REVOKED:
4706 case -NFS4ERR_BAD_STATEID:
ecac799a 4707 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4708 if (new_lock_owner != 0 ||
795a88c9 4709 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4710 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4711 break;
4712 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4713 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4714 case -NFS4ERR_EXPIRED:
4715 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4716 };
4717}
4718
afe6c27c 4719static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4720{
4721 struct nfs4_lockdata *data;
4722 struct rpc_task *task;
5138fde0
TM		 4723 struct rpc_message msg = {
4724 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4725 .rpc_cred = state->owner->so_cred,
4726 };
c970aa85
TM		 4727 struct rpc_task_setup task_setup_data = {
4728 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4729 .rpc_message = &msg,
c970aa85 4730 .callback_ops = &nfs4_lock_ops,
101070ca 4731 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4732 .flags = RPC_TASK_ASYNC,
4733 };
a5d16a4d
TM		 4734 int ret;
4735
3110ff80 4736 dprintk("%s: begin!\n", __func__);
cd3758e3 4737 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4738 fl->fl_u.nfs4_fl.owner,
4739 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4740 if (data == NULL)
4741 return -ENOMEM;
4742 if (IS_SETLKW(cmd))
4743 data->arg.block = 1;
9d12b216 4744 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4745 msg.rpc_argp = &data->arg;
4746 msg.rpc_resp = &data->res;
c970aa85 4747 task_setup_data.callback_data = data;
8fe72bac
TM		 4748 if (recovery_type > NFS_LOCK_NEW) {
4749 if (recovery_type == NFS_LOCK_RECLAIM)
4750 data->arg.reclaim = NFS_LOCK_RECLAIM;
4751 nfs4_set_sequence_privileged(&data->arg.seq_args);
4752 }
c970aa85 4753 task = rpc_run_task(&task_setup_data);
7a1218a2 4754 if (IS_ERR(task))
a5d16a4d 4755 return PTR_ERR(task);
a5d16a4d
TM		 4756 ret = nfs4_wait_for_completion_rpc_task(task);
4757 if (ret == 0) {
4758 ret = data->rpc_status;
2bee72a6
TM		 4759 if (ret)
4760 nfs4_handle_setlk_error(data->server, data->lsp,
4761 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4762 } else
4763 data->cancelled = 1;
e6b3c4db 4764 rpc_put_task(task);
3110ff80 4765 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4766 return ret;
1da177e4
LT		 4767}
4768
4769static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4770{
202b50dc 4771 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4772 struct nfs4_exception exception = {
4773 .inode = state->inode,
4774 };
202b50dc
TM		 4775 int err;
4776
4777 do {
42a2d13e
TM		 4778 /* Cache the lock if possible... */
4779 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4780 return 0;
afe6c27c 4781 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4782 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4783 break;
4784 nfs4_handle_exception(server, err, &exception);
4785 } while (exception.retry);
4786 return err;
1da177e4
LT		 4787}
4788
4789static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4790{
202b50dc 4791 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4792 struct nfs4_exception exception = {
4793 .inode = state->inode,
4794 };
202b50dc
TM		 4795 int err;
4796
6bfc93ef
TM		 4797 err = nfs4_set_lock_state(state, request);
4798 if (err != 0)
4799 return err;
202b50dc 4800 do {
42a2d13e
TM		 4801 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4802 return 0;
afe6c27c 4803 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4804 switch (err) {
4805 default:
4806 goto out;
4807 case -NFS4ERR_GRACE:
4808 case -NFS4ERR_DELAY:
4809 nfs4_handle_exception(server, err, &exception);
4810 err = 0;
4811 }
202b50dc 4812 } while (exception.retry);
a9ed2e25 4813out:
202b50dc 4814 return err;
1da177e4
LT		 4815}
4816
f062eb6c 4817#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 4818/**
4819 * nfs41_check_expired_locks - possibly free a lock stateid
4820 *
4821 * @state: NFSv4 state for an inode
4822 *
4823 * Returns NFS_OK if recovery for this stateid is now finished.
4824 * Otherwise a negative NFS4ERR value is returned.
4825 */
b01dd1d8 4826static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4827{
eb64cf96 4828 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 4829 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4830 struct nfs_server *server = NFS_SERVER(state->inode);
4831
b01dd1d8 4832 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 4833 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 4834 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4835 if (status != NFS_OK) {
3e60ffdd
CL		 4836 /* Free the stateid unless the server
4837 * informs us the stateid is unrecognized. */
89af2739
CL		 4838 if (status != -NFS4ERR_BAD_STATEID)
4839 nfs41_free_stateid(server,
4840 &lsp->ls_stateid);
795a88c9 4841 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 4842 ret = status;
4843 }
4844 }
4845 };
4846
4847 return ret;
4848}
4849
4850static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4851{
4852 int status = NFS_OK;
4853
4854 if (test_bit(LK_STATE_IN_USE, &state->flags))
4855 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 4856 if (status != NFS_OK)
4857 status = nfs4_lock_expired(state, request);
4858 return status;
f062eb6c
BS		 4859}
4860#endif
4861
1da177e4
LT		 4862static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4863{
9a99af49 4864 struct nfs4_state_owner *sp = state->owner;
19e03c57 4865 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4866 unsigned char fl_flags = request->fl_flags;
9a99af49 4867 unsigned int seq;
8e469ebd 4868 int status = -ENOLCK;
1da177e4 4869
8e469ebd
TM		 4870 if ((fl_flags & FL_POSIX) &&
4871 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4872 goto out;
6bfc93ef 4873 /* Is this a delegated open? */
6bfc93ef
TM		 4874 status = nfs4_set_lock_state(state, request);
4875 if (status != 0)
4876 goto out;
01c3b861
TM		 4877 request->fl_flags |= FL_ACCESS;
4878 status = do_vfs_lock(request->fl_file, request);
4879 if (status < 0)
4880 goto out;
19e03c57 4881 down_read(&nfsi->rwsem);
01c3b861 4882 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4883 /* Yes: cache locks! */
01c3b861 4884 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4885 request->fl_flags = fl_flags & ~FL_SLEEP;
4886 status = do_vfs_lock(request->fl_file, request);
4887 goto out_unlock;
01c3b861 4888 }
9a99af49
TM		 4889 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
4890 up_read(&nfsi->rwsem);
afe6c27c 4891 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4892 if (status != 0)
9a99af49
TM		 4893 goto out;
4894 down_read(&nfsi->rwsem);
4895 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
4896 status = -NFS4ERR_DELAY;
01c3b861 4897 goto out_unlock;
9a99af49 4898 }
6bfc93ef 4899 /* Note: we always want to sleep here! */
01c3b861 4900 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4901 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 4902 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4903 "manager!\n", __func__);
01c3b861 4904out_unlock:
19e03c57 4905 up_read(&nfsi->rwsem);
01c3b861
TM		 4906out:
4907 request->fl_flags = fl_flags;
1da177e4
LT		 4908 return status;
4909}
4910
4911static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4912{
a1d0b5ee
TM		 4913 struct nfs4_exception exception = {
4914 .state = state,
05ffe24f 4915 .inode = state->inode,
a1d0b5ee 4916 };
1da177e4
LT		 4917 int err;
4918
4919 do {
965b5d67
TM		 4920 err = _nfs4_proc_setlk(state, cmd, request);
4921 if (err == -NFS4ERR_DENIED)
4922 err = -EAGAIN;
1da177e4 4923 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4924 err, &exception);
1da177e4
LT		 4925 } while (exception.retry);
4926 return err;
4927}
4928
4929static int
4930nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4931{
4932 struct nfs_open_context *ctx;
4933 struct nfs4_state *state;
4934 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4935 int status;
4936
4937 /* verify open state */
cd3758e3 4938 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4939 state = ctx->state;
4940
4941 if (request->fl_start < 0 || request->fl_end < 0)
4942 return -EINVAL;
4943
d953126a
TM		 4944 if (IS_GETLK(cmd)) {
4945 if (state != NULL)
4946 return nfs4_proc_getlk(state, F_GETLK, request);
4947 return 0;
4948 }
1da177e4
LT		 4949
4950 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4951 return -EINVAL;
4952
d953126a
TM		 4953 if (request->fl_type == F_UNLCK) {
4954 if (state != NULL)
4955 return nfs4_proc_unlck(state, cmd, request);
4956 return 0;
4957 }
1da177e4 4958
d953126a
TM		 4959 if (state == NULL)
4960 return -ENOLCK;
55725513
TM		 4961 /*
4962 * Don't rely on the VFS having checked the file open mode,
4963 * since it won't do this for flock() locks.
4964 */
f44106e2 4965 switch (request->fl_type) {
55725513
TM		 4966 case F_RDLCK:
4967 if (!(filp->f_mode & FMODE_READ))
4968 return -EBADF;
4969 break;
4970 case F_WRLCK:
4971 if (!(filp->f_mode & FMODE_WRITE))
4972 return -EBADF;
4973 }
4974
1da177e4
LT		 4975 do {
4976 status = nfs4_proc_setlk(state, cmd, request);
4977 if ((status != -EAGAIN) || IS_SETLK(cmd))
4978 break;
4979 timeout = nfs4_set_lock_task_retry(timeout);
4980 status = -ERESTARTSYS;
4981 if (signalled())
4982 break;
4983 } while(status < 0);
1da177e4
LT		 4984 return status;
4985}
4986
888e694c
TM		 4987int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4988{
4989 struct nfs_server *server = NFS_SERVER(state->inode);
4990 struct nfs4_exception exception = { };
4991 int err;
4992
4993 err = nfs4_set_lock_state(state, fl);
4994 if (err != 0)
4995 goto out;
4996 do {
afe6c27c 4997 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4998 switch (err) {
4999 default:
a030889a
WAA		 5000 printk(KERN_ERR "NFS: %s: unhandled error "
5001 "%d.\n", __func__, err);
d5122201 5002 case 0:
965b5d67 5003 case -ESTALE:
d5122201 5004 goto out;
d5122201 5005 case -NFS4ERR_STALE_CLIENTID:
965b5d67 5006 case -NFS4ERR_STALE_STATEID:
37380e42
TM		 5007 set_bit(NFS_DELEGATED_STATE, &state->flags);
5008 case -NFS4ERR_EXPIRED:
0400a6b0 5009 nfs4_schedule_lease_recovery(server->nfs_client);
37380e42 5010 err = -EAGAIN;
0400a6b0 5011 goto out;
74e7bb73
RL		 5012 case -NFS4ERR_BADSESSION:
5013 case -NFS4ERR_BADSLOT:
5014 case -NFS4ERR_BAD_HIGH_SLOT:
5015 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
5016 case -NFS4ERR_DEADSESSION:
37380e42 5017 set_bit(NFS_DELEGATED_STATE, &state->flags);
9f594791 5018 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
37380e42 5019 err = -EAGAIN;
d5122201 5020 goto out;
a1d0b5ee 5021 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 5022 case -NFS4ERR_ADMIN_REVOKED:
5023 case -NFS4ERR_BAD_STATEID:
5024 case -NFS4ERR_OPENMODE:
0400a6b0 5025 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 5026 err = 0;
5027 goto out;
5028 case -ENOMEM:
5029 case -NFS4ERR_DENIED:
5030 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
5031 err = 0;
5032 goto out;
d5122201 5033 }
37380e42 5034 set_bit(NFS_DELEGATED_STATE, &state->flags);
888e694c
TM		 5035 err = nfs4_handle_exception(server, err, &exception);
5036 } while (exception.retry);
5037out:
5038 return err;
5039}
6b3b5496 5040
cf470c3e
TM		 5041struct nfs_release_lockowner_data {
5042 struct nfs4_lock_state *lsp;
5ae67c4f 5043 struct nfs_server *server;
cf470c3e
TM		 5044 struct nfs_release_lockowner_args args;
5045};
5046
d3c7b7cc
TM		 5047static void nfs4_release_lockowner_release(void *calldata)
5048{
cf470c3e 5049 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5050 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5051 kfree(calldata);
5052}
5053
17280175 5054static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5055 .rpc_release = nfs4_release_lockowner_release,
5056};
5057
cf470c3e 5058int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 5059{
5060 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 5061 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5062 struct rpc_message msg = {
5063 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5064 };
5065
5066 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5067 return -EINVAL;
5068 data = kmalloc(sizeof(*data), GFP_NOFS);
5069 if (!data)
5070 return -ENOMEM;
5071 data->lsp = lsp;
5ae67c4f 5072 data->server = server;
cf470c3e
TM		 5073 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5074 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5075 data->args.lock_owner.s_dev = server->s_dev;
5076 msg.rpc_argp = &data->args;
5077 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5078 return 0;
d3c7b7cc
TM		 5079}
5080
aa1870af
BF		 5081#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5082
64c2ce8b
AK		 5083static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5084 const void *buf, size_t buflen,
5085 int flags, int type)
6b3b5496 5086{
64c2ce8b
AK		 5087 if (strcmp(key, "") != 0)
5088 return -EINVAL;
4b580ee3 5089
64c2ce8b 5090 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5091}
5092
64c2ce8b
AK		 5093static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5094 void *buf, size_t buflen, int type)
6b3b5496 5095{
64c2ce8b
AK		 5096 if (strcmp(key, "") != 0)
5097 return -EINVAL;
aa1870af 5098
64c2ce8b 5099 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5100}
5101
64c2ce8b
AK		 5102static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5103 size_t list_len, const char *name,
5104 size_t name_len, int type)
6b3b5496 5105{
64c2ce8b 5106 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5107
096455a2
BF		 5108 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5109 return 0;
64c2ce8b
AK		 5110
5111 if (list && len <= list_len)
5112 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5113 return len;
6b3b5496
BF		 5114}
5115
533eb461
AA		 5116/*
5117 * nfs_fhget will use either the mounted_on_fileid or the fileid
5118 */
69aaaae1
TM		 5119static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5120{
533eb461
AA		 5121 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5122 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5123 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5124 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5125 return;
5126
5127 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5128 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5129 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5130 fattr->nlink = 2;
5131}
5132
f05d147f
BS		 5133static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5134 const struct qstr *name,
5135 struct nfs4_fs_locations *fs_locations,
5136 struct page *page)
683b57b4
TM		 5137{
5138 struct nfs_server *server = NFS_SERVER(dir);
5139 u32 bitmask[2] = {
361e624f 5140 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5141 };
5142 struct nfs4_fs_locations_arg args = {
5143 .dir_fh = NFS_FH(dir),
c228fd3a 5144 .name = name,
683b57b4
TM		 5145 .page = page,
5146 .bitmask = bitmask,
5147 };
22958463
BH		 5148 struct nfs4_fs_locations_res res = {
5149 .fs_locations = fs_locations,
5150 };
683b57b4
TM		 5151 struct rpc_message msg = {
5152 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5153 .rpc_argp = &args,
22958463 5154 .rpc_resp = &res,
683b57b4
TM		 5155 };
5156 int status;
5157
3110ff80 5158 dprintk("%s: start\n", __func__);
533eb461
AA		 5159
5160 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5161 * is not supported */
5162 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5163 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5164 else
5165 bitmask[0] |= FATTR4_WORD0_FILEID;
5166
c228fd3a 5167 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5168 fs_locations->server = server;
830b8e33 5169 fs_locations->nlocations = 0;
f05d147f 5170 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5171 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5172 return status;
5173}
5174
f05d147f
BS		 5175int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5176 const struct qstr *name,
5177 struct nfs4_fs_locations *fs_locations,
5178 struct page *page)
db0a9593
BS		 5179{
5180 struct nfs4_exception exception = { };
5181 int err;
5182 do {
5183 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5184 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5185 &exception);
5186 } while (exception.retry);
5187 return err;
5188}
5189
5a5ea0d4
BS		 5190static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5191{
5192 int status;
5193 struct nfs4_secinfo_arg args = {
5194 .dir_fh = NFS_FH(dir),
5195 .name = name,
5196 };
5197 struct nfs4_secinfo_res res = {
5198 .flavors = flavors,
5199 };
5200 struct rpc_message msg = {
5201 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5202 .rpc_argp = &args,
5203 .rpc_resp = &res,
5204 };
5205
5206 dprintk("NFS call secinfo %s\n", name->name);
5207 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5208 dprintk("NFS reply secinfo: %d\n", status);
5209 return status;
5210}
5211
72de53ec
BS		 5212int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5213 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5214{
5215 struct nfs4_exception exception = { };
5216 int err;
5217 do {
5218 err = nfs4_handle_exception(NFS_SERVER(dir),
5219 _nfs4_proc_secinfo(dir, name, flavors),
5220 &exception);
5221 } while (exception.retry);
5222 return err;
5223}
5224
557134a3 5225#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5226/*
5227 * Check the exchange flags returned by the server for invalid flags, having
5228 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5229 * DS flags set.
5230 */
5231static int nfs4_check_cl_exchange_flags(u32 flags)
5232{
5233 if (flags & ~EXCHGID4_FLAG_MASK_R)
5234 goto out_inval;
5235 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5236 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5237 goto out_inval;
5238 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5239 goto out_inval;
5240 return NFS_OK;
5241out_inval:
5242 return -NFS4ERR_INVAL;
5243}
5244
78fe0f41 5245static bool
79d4e1f0
CL		 5246nfs41_same_server_scope(struct nfs41_server_scope *a,
5247 struct nfs41_server_scope *b)
78fe0f41
WAA		 5248{
5249 if (a->server_scope_sz == b->server_scope_sz &&
5250 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5251 return true;
5252
5253 return false;
5254}
5255
7c44f1ae
WAA		 5256/*
5257 * nfs4_proc_bind_conn_to_session()
5258 *
5259 * The 4.1 client currently uses the same TCP connection for the
5260 * fore and backchannel.
5261 */
2cf047c9 5262int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5263{
5264 int status;
5265 struct nfs41_bind_conn_to_session_res res;
5266 struct rpc_message msg = {
5267 .rpc_proc =
5268 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5269 .rpc_argp = clp,
5270 .rpc_resp = &res,
2cf047c9 5271 .rpc_cred = cred,
7c44f1ae
WAA		 5272 };
5273
5274 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5275
5276 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5277 if (unlikely(res.session == NULL)) {
5278 status = -ENOMEM;
5279 goto out;
5280 }
5281
5282 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5283 if (status == 0) {
5284 if (memcmp(res.session->sess_id.data,
5285 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5286 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5287 status = -EIO;
5288 goto out_session;
5289 }
5290 if (res.dir != NFS4_CDFS4_BOTH) {
5291 dprintk("NFS: %s: Unexpected direction from server\n",
5292 __func__);
5293 status = -EIO;
5294 goto out_session;
5295 }
5296 if (res.use_conn_in_rdma_mode) {
5297 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5298 __func__);
5299 status = -EIO;
5300 goto out_session;
5301 }
5302 }
5303out_session:
5304 kfree(res.session);
5305out:
5306 dprintk("<-- %s status= %d\n", __func__, status);
5307 return status;
5308}
5309
99fe60d0
BH		 5310/*
5311 * nfs4_proc_exchange_id()
5312 *
6bbb4ae8
CL		 5313 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5314 *
99fe60d0
BH		 5315 * Since the clientid has expired, all compounds using sessions
5316 * associated with the stale clientid will be returning
5317 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5318 * be in some phase of session reset.
5319 */
4d643d1d 5320int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5321{
5322 nfs4_verifier verifier;
5323 struct nfs41_exchange_id_args args = {
cd93710e 5324 .verifier = &verifier,
99fe60d0 5325 .client = clp,
357f54d6 5326 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5327 };
5328 struct nfs41_exchange_id_res res = {
32b01310 5329 0
99fe60d0
BH		 5330 };
5331 int status;
5332 struct rpc_message msg = {
5333 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5334 .rpc_argp = &args,
5335 .rpc_resp = &res,
5336 .rpc_cred = cred,
5337 };
99fe60d0 5338
f092075d 5339 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5340 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5341 sizeof(args.id));
6bbb4ae8
CL		 5342 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5343 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5344 args.id_len, args.id);
99fe60d0 5345
acdeb69d 5346 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5347 GFP_NOFS);
acdeb69d 5348 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5349 status = -ENOMEM;
5350 goto out;
5351 }
78fe0f41 5352
79d4e1f0 5353 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5354 GFP_NOFS);
177313f1 5355 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5356 status = -ENOMEM;
acdeb69d 5357 goto out_server_owner;
abe9a6d5 5358 }
78fe0f41 5359
bbafffd2 5360 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5361 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5362 status = -ENOMEM;
5363 goto out_server_scope;
5364 }
5365
1bd714f2 5366 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5367 if (status == 0)
32b01310 5368 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5369
acdeb69d 5370 if (status == 0) {
32b01310
TM		 5371 clp->cl_clientid = res.clientid;
5372 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5373 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5374 clp->cl_seqid = res.seqid;
5375
acdeb69d
CL		 5376 kfree(clp->cl_serverowner);
5377 clp->cl_serverowner = res.server_owner;
5378 res.server_owner = NULL;
78fe0f41 5379
7d2ed9ac 5380 /* use the most recent implementation id */
59155546
CL		 5381 kfree(clp->cl_implid);
5382 clp->cl_implid = res.impl_id;
7d2ed9ac 5383
177313f1 5384 if (clp->cl_serverscope != NULL &&
79d4e1f0 5385 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5386 res.server_scope)) {
5387 dprintk("%s: server_scope mismatch detected\n",
5388 __func__);
5389 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5390 kfree(clp->cl_serverscope);
5391 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5392 }
5393
177313f1 5394 if (clp->cl_serverscope == NULL) {
79d4e1f0 5395 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5396 goto out;
5397 }
32b01310
TM		 5398 } else
5399 kfree(res.impl_id);
7d2ed9ac 5400
acdeb69d
CL		 5401out_server_owner:
5402 kfree(res.server_owner);
7d2ed9ac 5403out_server_scope:
abe9a6d5
WAA		 5404 kfree(res.server_scope);
5405out:
177313f1 5406 if (clp->cl_implid != NULL)
6bbb4ae8 5407 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5408 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5409 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5410 clp->cl_implid->date.seconds,
5411 clp->cl_implid->date.nseconds);
6bbb4ae8 5412 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5413 return status;
5414}
5415
66245539
TM		 5416static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5417 struct rpc_cred *cred)
5418{
5419 struct rpc_message msg = {
5420 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5421 .rpc_argp = clp,
5422 .rpc_cred = cred,
5423 };
5424 int status;
5425
5426 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5427 if (status)
02c67525 5428 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5429 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5430 return status;
5431}
5432
5433static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5434 struct rpc_cred *cred)
5435{
5436 unsigned int loop;
5437 int ret;
5438
5439 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5440 ret = _nfs4_proc_destroy_clientid(clp, cred);
5441 switch (ret) {
5442 case -NFS4ERR_DELAY:
5443 case -NFS4ERR_CLIENTID_BUSY:
5444 ssleep(1);
5445 break;
5446 default:
5447 return ret;
5448 }
5449 }
5450 return 0;
5451}
5452
5453int nfs4_destroy_clientid(struct nfs_client *clp)
5454{
5455 struct rpc_cred *cred;
5456 int ret = 0;
5457
5458 if (clp->cl_mvops->minor_version < 1)
5459 goto out;
5460 if (clp->cl_exchange_flags == 0)
5461 goto out;
05f4c350
CL		 5462 if (clp->cl_preserve_clid)
5463 goto out;
66245539
TM		 5464 cred = nfs4_get_exchange_id_cred(clp);
5465 ret = nfs4_proc_destroy_clientid(clp, cred);
5466 if (cred)
5467 put_rpccred(cred);
5468 switch (ret) {
5469 case 0:
5470 case -NFS4ERR_STALE_CLIENTID:
5471 clp->cl_exchange_flags = 0;
5472 }
5473out:
5474 return ret;
5475}
5476
2050f0cc
AA		 5477struct nfs4_get_lease_time_data {
5478 struct nfs4_get_lease_time_args *args;
5479 struct nfs4_get_lease_time_res *res;
5480 struct nfs_client *clp;
5481};
5482
5483static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5484 void *calldata)
5485{
2050f0cc
AA		 5486 struct nfs4_get_lease_time_data *data =
5487 (struct nfs4_get_lease_time_data *)calldata;
5488
5489 dprintk("--> %s\n", __func__);
5490 /* just setup sequence, do not trigger session recovery
5491 since we're invoked within one */
d9afbd1b
TM		 5492 nfs41_setup_sequence(data->clp->cl_session,
5493 &data->args->la_seq_args,
5494 &data->res->lr_seq_res,
5495 task);
2050f0cc
AA		 5496 dprintk("<-- %s\n", __func__);
5497}
5498
5499/*
5500 * Called from nfs4_state_manager thread for session setup, so don't recover
5501 * from sequence operation or clientid errors.
5502 */
5503static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5504{
5505 struct nfs4_get_lease_time_data *data =
5506 (struct nfs4_get_lease_time_data *)calldata;
5507
5508 dprintk("--> %s\n", __func__);
14516c3a
TM		 5509 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5510 return;
2050f0cc
AA		 5511 switch (task->tk_status) {
5512 case -NFS4ERR_DELAY:
5513 case -NFS4ERR_GRACE:
5514 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5515 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5516 task->tk_status = 0;
a8a4ae3a
AA		 5517 /* fall through */
5518 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5519 rpc_restart_call_prepare(task);
2050f0cc
AA		 5520 return;
5521 }
2050f0cc
AA		 5522 dprintk("<-- %s\n", __func__);
5523}
5524
17280175 5525static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5526 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5527 .rpc_call_done = nfs4_get_lease_time_done,
5528};
5529
5530int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5531{
5532 struct rpc_task *task;
5533 struct nfs4_get_lease_time_args args;
5534 struct nfs4_get_lease_time_res res = {
5535 .lr_fsinfo = fsinfo,
5536 };
5537 struct nfs4_get_lease_time_data data = {
5538 .args = &args,
5539 .res = &res,
5540 .clp = clp,
5541 };
5542 struct rpc_message msg = {
5543 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5544 .rpc_argp = &args,
5545 .rpc_resp = &res,
5546 };
5547 struct rpc_task_setup task_setup = {
5548 .rpc_client = clp->cl_rpcclient,
5549 .rpc_message = &msg,
5550 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5551 .callback_data = &data,
5552 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5553 };
5554 int status;
5555
9d12b216 5556 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5557 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5558 dprintk("--> %s\n", __func__);
5559 task = rpc_run_task(&task_setup);
5560
5561 if (IS_ERR(task))
5562 status = PTR_ERR(task);
5563 else {
5564 status = task->tk_status;
5565 rpc_put_task(task);
5566 }
5567 dprintk("<-- %s return %d\n", __func__, status);
5568
5569 return status;
5570}
5571
fc931582
AA		 5572/*
5573 * Initialize the values to be used by the client in CREATE_SESSION
5574 * If nfs4_init_session set the fore channel request and response sizes,
5575 * use them.
5576 *
5577 * Set the back channel max_resp_sz_cached to zero to force the client to
5578 * always set csa_cachethis to FALSE because the current implementation
5579 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5580 */
5581static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5582{
5583 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5584 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5585 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5586
5587 if (mxrqst_sz == 0)
5588 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5589 if (mxresp_sz == 0)
5590 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5591 /* Fore channel attributes */
fc931582
AA		 5592 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5593 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5594 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5595 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5596
5597 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5598 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5599 __func__,
5600 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5601 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5602
5603 /* Back channel attributes */
fc931582
AA		 5604 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5605 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5606 args->bc_attrs.max_resp_sz_cached = 0;
5607 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5608 args->bc_attrs.max_reqs = 1;
5609
5610 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5611 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5612 __func__,
5613 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5614 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5615 args->bc_attrs.max_reqs);
5616}
5617
43c2e885 5618static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5619{
43c2e885
BF		 5620 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5621 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5622
43c2e885
BF		 5623 if (rcvd->max_resp_sz > sent->max_resp_sz)
5624 return -EINVAL;
5625 /*
5626 * Our requested max_ops is the minimum we need; we're not
5627 * prepared to break up compounds into smaller pieces than that.
5628 * So, no point even trying to continue if the server won't
5629 * cooperate:
5630 */
5631 if (rcvd->max_ops < sent->max_ops)
5632 return -EINVAL;
5633 if (rcvd->max_reqs == 0)
5634 return -EINVAL;
b4b9a0c1
VG		 5635 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5636 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5637 return 0;
8d35301d
AA		 5638}
5639
43c2e885
BF		 5640static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5641{
5642 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5643 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5644
43c2e885
BF		 5645 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5646 return -EINVAL;
5647 if (rcvd->max_resp_sz < sent->max_resp_sz)
5648 return -EINVAL;
5649 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5650 return -EINVAL;
5651 /* These would render the backchannel useless: */
b4b9a0c1 5652 if (rcvd->max_ops != sent->max_ops)
43c2e885 5653 return -EINVAL;
b4b9a0c1 5654 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5655 return -EINVAL;
5656 return 0;
5657}
8d35301d 5658
8d35301d
AA		 5659static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5660 struct nfs4_session *session)
5661{
43c2e885 5662 int ret;
8d35301d 5663
43c2e885
BF		 5664 ret = nfs4_verify_fore_channel_attrs(args, session);
5665 if (ret)
5666 return ret;
5667 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5668}
5669
848f5bda
TM		 5670static int _nfs4_proc_create_session(struct nfs_client *clp,
5671 struct rpc_cred *cred)
fc931582
AA		 5672{
5673 struct nfs4_session *session = clp->cl_session;
5674 struct nfs41_create_session_args args = {
5675 .client = clp,
5676 .cb_program = NFS4_CALLBACK,
5677 };
5678 struct nfs41_create_session_res res = {
5679 .client = clp,
5680 };
5681 struct rpc_message msg = {
5682 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5683 .rpc_argp = &args,
5684 .rpc_resp = &res,
848f5bda 5685 .rpc_cred = cred,
fc931582
AA		 5686 };
5687 int status;
5688
5689 nfs4_init_channel_attrs(&args);
0f91421e 5690 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5691
1bd714f2 5692 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5693
43095d39 5694 if (!status) {
8d35301d
AA		 5695 /* Verify the session's negotiated channel_attrs values */
5696 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5697 /* Increment the clientid slot sequence id */
5698 clp->cl_seqid++;
5699 }
5700
5701 return status;
5702}
5703
5704/*
5705 * Issues a CREATE_SESSION operation to the server.
5706 * It is the responsibility of the caller to verify the session is
5707 * expired before calling this routine.
5708 */
848f5bda 5709int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5710{
5711 int status;
5712 unsigned *ptr;
fc931582
AA		 5713 struct nfs4_session *session = clp->cl_session;
5714
5715 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5716
848f5bda 5717 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5718 if (status)
5719 goto out;
5720
aacd5537
AA		 5721 /* Init or reset the session slot tables */
5722 status = nfs4_setup_session_slot_tables(session);
5723 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5724 if (status)
5725 goto out;
5726
5727 ptr = (unsigned *)&session->sess_id.data[0];
5728 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5729 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5730out:
5731 dprintk("<-- %s\n", __func__);
5732 return status;
5733}
5734
0f3e66c6
AA		 5735/*
5736 * Issue the over-the-wire RPC DESTROY_SESSION.
5737 * The caller must serialize access to this routine.
5738 */
848f5bda
TM		 5739int nfs4_proc_destroy_session(struct nfs4_session *session,
5740 struct rpc_cred *cred)
0f3e66c6 5741{
848f5bda
TM		 5742 struct rpc_message msg = {
5743 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5744 .rpc_argp = session,
5745 .rpc_cred = cred,
5746 };
0f3e66c6 5747 int status = 0;
0f3e66c6
AA		 5748
5749 dprintk("--> nfs4_proc_destroy_session\n");
5750
5751 /* session is still being setup */
5752 if (session->clp->cl_cons_state != NFS_CS_READY)
5753 return status;
5754
1bd714f2 5755 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5756
5757 if (status)
08106ac7 5758 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5759 "Session has been destroyed regardless...\n", status);
5760
5761 dprintk("<-- nfs4_proc_destroy_session\n");
5762 return status;
5763}
5764
fc01cea9
AA		 5765/*
5766 * Renew the cl_session lease.
5767 */
d5f8d3fe
TM		 5768struct nfs4_sequence_data {
5769 struct nfs_client *clp;
5770 struct nfs4_sequence_args args;
5771 struct nfs4_sequence_res res;
5772};
5773
dc96aef9
AB		 5774static void nfs41_sequence_release(void *data)
5775{
d5f8d3fe
TM		 5776 struct nfs4_sequence_data *calldata = data;
5777 struct nfs_client *clp = calldata->clp;
dc96aef9 5778
7135840f
AB		 5779 if (atomic_read(&clp->cl_count) > 1)
5780 nfs4_schedule_state_renewal(clp);
5781 nfs_put_client(clp);
d5f8d3fe 5782 kfree(calldata);
dc96aef9
AB		 5783}
5784
aa5190d0
TM		 5785static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5786{
5787 switch(task->tk_status) {
5788 case -NFS4ERR_DELAY:
aa5190d0
TM		 5789 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5790 return -EAGAIN;
5791 default:
0400a6b0 5792 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5793 }
5794 return 0;
5795}
5796
dc96aef9 5797static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5798{
d5f8d3fe
TM		 5799 struct nfs4_sequence_data *calldata = data;
5800 struct nfs_client *clp = calldata->clp;
fc01cea9 5801
14516c3a
TM		 5802 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5803 return;
fc01cea9
AA		 5804
5805 if (task->tk_status < 0) {
5806 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5807 if (atomic_read(&clp->cl_count) == 1)
5808 goto out;
fc01cea9 5809
aa5190d0
TM		 5810 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5811 rpc_restart_call_prepare(task);
fc01cea9
AA		 5812 return;
5813 }
5814 }
fc01cea9 5815 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5816out:
fc01cea9
AA		 5817 dprintk("<-- %s\n", __func__);
5818}
5819
5820static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5821{
d5f8d3fe
TM		 5822 struct nfs4_sequence_data *calldata = data;
5823 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5824 struct nfs4_sequence_args *args;
5825 struct nfs4_sequence_res *res;
5826
fc01cea9
AA		 5827 args = task->tk_msg.rpc_argp;
5828 res = task->tk_msg.rpc_resp;
5829
d9afbd1b 5830 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 5831}
5832
5833static const struct rpc_call_ops nfs41_sequence_ops = {
5834 .rpc_call_done = nfs41_sequence_call_done,
5835 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5836 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5837};
5838
8fe72bac
TM		 5839static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
5840 struct rpc_cred *cred,
5841 bool is_privileged)
fc01cea9 5842{
d5f8d3fe 5843 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5844 struct rpc_message msg = {
5845 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5846 .rpc_cred = cred,
5847 };
71ac6da9
TM		 5848 struct rpc_task_setup task_setup_data = {
5849 .rpc_client = clp->cl_rpcclient,
5850 .rpc_message = &msg,
8fe72bac 5851 .callback_ops = &nfs41_sequence_ops,
71ac6da9
TM		 5852 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5853 };
fc01cea9 5854
7135840f 5855 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5856 return ERR_PTR(-EIO);
dfb4f309 5857 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5858 if (calldata == NULL) {
7135840f 5859 nfs_put_client(clp);
71ac6da9 5860 return ERR_PTR(-ENOMEM);
fc01cea9 5861 }
9d12b216 5862 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 5863 if (is_privileged)
5864 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 5865 msg.rpc_argp = &calldata->args;
5866 msg.rpc_resp = &calldata->res;
5867 calldata->clp = clp;
71ac6da9 5868 task_setup_data.callback_data = calldata;
fc01cea9 5869
71ac6da9
TM		 5870 return rpc_run_task(&task_setup_data);
5871}
5872
2f60ea6b 5873static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 5874{
5875 struct rpc_task *task;
5876 int ret = 0;
5877
2f60ea6b
TM		 5878 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5879 return 0;
8fe72bac 5880 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 5881 if (IS_ERR(task))
5882 ret = PTR_ERR(task);
5883 else
bf294b41 5884 rpc_put_task_async(task);
71ac6da9
TM		 5885 dprintk("<-- %s status=%d\n", __func__, ret);
5886 return ret;
5887}
5888
5889static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5890{
5891 struct rpc_task *task;
5892 int ret;
5893
8fe72bac 5894 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 5895 if (IS_ERR(task)) {
5896 ret = PTR_ERR(task);
5897 goto out;
5898 }
5899 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5900 if (!ret) {
5901 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5902
5903 if (task->tk_status == 0)
5904 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 5905 ret = task->tk_status;
b4410c2f 5906 }
71ac6da9
TM		 5907 rpc_put_task(task);
5908out:
5909 dprintk("<-- %s status=%d\n", __func__, ret);
5910 return ret;
fc01cea9
AA		 5911}
5912
fce5c838
RL		 5913struct nfs4_reclaim_complete_data {
5914 struct nfs_client *clp;
5915 struct nfs41_reclaim_complete_args arg;
5916 struct nfs41_reclaim_complete_res res;
5917};
5918
5919static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5920{
5921 struct nfs4_reclaim_complete_data *calldata = data;
5922
d9afbd1b
TM		 5923 nfs41_setup_sequence(calldata->clp->cl_session,
5924 &calldata->arg.seq_args,
5925 &calldata->res.seq_res,
5926 task);
fce5c838
RL		 5927}
5928
aa5190d0
TM		 5929static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5930{
5931 switch(task->tk_status) {
5932 case 0:
5933 case -NFS4ERR_COMPLETE_ALREADY:
5934 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5935 break;
5936 case -NFS4ERR_DELAY:
aa5190d0 5937 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 5938 /* fall through */
5939 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 5940 return -EAGAIN;
5941 default:
0400a6b0 5942 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5943 }
5944 return 0;
5945}
5946
fce5c838
RL		 5947static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5948{
5949 struct nfs4_reclaim_complete_data *calldata = data;
5950 struct nfs_client *clp = calldata->clp;
5951 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5952
5953 dprintk("--> %s\n", __func__);
14516c3a
TM		 5954 if (!nfs41_sequence_done(task, res))
5955 return;
fce5c838 5956
aa5190d0
TM		 5957 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5958 rpc_restart_call_prepare(task);
5959 return;
5960 }
fce5c838
RL		 5961 dprintk("<-- %s\n", __func__);
5962}
5963
5964static void nfs4_free_reclaim_complete_data(void *data)
5965{
5966 struct nfs4_reclaim_complete_data *calldata = data;
5967
5968 kfree(calldata);
5969}
5970
5971static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5972 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5973 .rpc_call_done = nfs4_reclaim_complete_done,
5974 .rpc_release = nfs4_free_reclaim_complete_data,
5975};
5976
5977/*
5978 * Issue a global reclaim complete.
5979 */
5980static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5981{
5982 struct nfs4_reclaim_complete_data *calldata;
5983 struct rpc_task *task;
5984 struct rpc_message msg = {
5985 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5986 };
5987 struct rpc_task_setup task_setup_data = {
5988 .rpc_client = clp->cl_rpcclient,
5989 .rpc_message = &msg,
5990 .callback_ops = &nfs4_reclaim_complete_call_ops,
5991 .flags = RPC_TASK_ASYNC,
5992 };
5993 int status = -ENOMEM;
5994
5995 dprintk("--> %s\n", __func__);
8535b2be 5996 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5997 if (calldata == NULL)
5998 goto out;
5999 calldata->clp = clp;
6000 calldata->arg.one_fs = 0;
fce5c838 6001
9d12b216 6002 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6003 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6004 msg.rpc_argp = &calldata->arg;
6005 msg.rpc_resp = &calldata->res;
6006 task_setup_data.callback_data = calldata;
6007 task = rpc_run_task(&task_setup_data);
acf82b85 6008 if (IS_ERR(task)) {
fce5c838 6009 status = PTR_ERR(task);
acf82b85
DC		 6010 goto out;
6011 }
c34c32ea
AA		 6012 status = nfs4_wait_for_completion_rpc_task(task);
6013 if (status == 0)
6014 status = task->tk_status;
fce5c838 6015 rpc_put_task(task);
acf82b85 6016 return 0;
fce5c838
RL		 6017out:
6018 dprintk("<-- %s status=%d\n", __func__, status);
6019 return status;
6020}
b1f69b75
AA		 6021
6022static void
6023nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6024{
6025 struct nfs4_layoutget *lgp = calldata;
c31663d4 6026 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6027 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6028
6029 dprintk("--> %s\n", __func__);
c31663d4
FI		 6030 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6031 * right now covering the LAYOUTGET we are about to send.
6032 * However, that is not so catastrophic, and there seems
6033 * to be no way to prevent it completely.
6034 */
6ba7db34 6035 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6036 &lgp->res.seq_res, task))
b1f69b75 6037 return;
cf7d63f1
FI		 6038 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6039 NFS_I(lgp->args.inode)->layout,
6040 lgp->args.ctx->state)) {
6041 rpc_exit(task, NFS4_OK);
cf7d63f1 6042 }
b1f69b75
AA		 6043}
6044
6045static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6046{
6047 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6048 struct inode *inode = lgp->args.inode;
6049 struct nfs_server *server = NFS_SERVER(inode);
6050 struct pnfs_layout_hdr *lo;
6051 struct nfs4_state *state = NULL;
30005121 6052 unsigned long timeo, giveup;
b1f69b75
AA		 6053
6054 dprintk("--> %s\n", __func__);
6055
6ba7db34 6056 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6057 goto out;
b1f69b75
AA		 6058
6059 switch (task->tk_status) {
6060 case 0:
ee314c2a 6061 goto out;
b1f69b75
AA		 6062 case -NFS4ERR_LAYOUTTRYLATER:
6063 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6064 timeo = rpc_get_timeout(task->tk_client);
6065 giveup = lgp->args.timestamp + timeo;
6066 if (time_after(giveup, jiffies))
6067 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6068 break;
6069 case -NFS4ERR_EXPIRED:
6070 case -NFS4ERR_BAD_STATEID:
6071 spin_lock(&inode->i_lock);
6072 lo = NFS_I(inode)->layout;
6073 if (!lo || list_empty(&lo->plh_segs)) {
6074 spin_unlock(&inode->i_lock);
6075 /* If the open stateid was bad, then recover it. */
6076 state = lgp->args.ctx->state;
6077 } else {
6078 LIST_HEAD(head);
6079
6080 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6081 spin_unlock(&inode->i_lock);
6082 /* Mark the bad layout state as invalid, then
6083 * retry using the open stateid. */
6084 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6085 }
6086 }
ee314c2a
TM		 6087 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6088 rpc_restart_call_prepare(task);
6089out:
b1f69b75
AA		 6090 dprintk("<-- %s\n", __func__);
6091}
6092
8554116e
IK		 6093static size_t max_response_pages(struct nfs_server *server)
6094{
6095 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6096 return nfs_page_array_len(0, max_resp_sz);
6097}
6098
6099static void nfs4_free_pages(struct page **pages, size_t size)
6100{
6101 int i;
6102
6103 if (!pages)
6104 return;
6105
6106 for (i = 0; i < size; i++) {
6107 if (!pages[i])
6108 break;
6109 __free_page(pages[i]);
6110 }
6111 kfree(pages);
6112}
6113
6114static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6115{
6116 struct page **pages;
6117 int i;
6118
6119 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6120 if (!pages) {
6121 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6122 return NULL;
6123 }
6124
6125 for (i = 0; i < size; i++) {
6126 pages[i] = alloc_page(gfp_flags);
6127 if (!pages[i]) {
6128 dprintk("%s: failed to allocate page\n", __func__);
6129 nfs4_free_pages(pages, size);
6130 return NULL;
6131 }
6132 }
6133
6134 return pages;
6135}
6136
b1f69b75
AA		 6137static void nfs4_layoutget_release(void *calldata)
6138{
6139 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6140 struct inode *inode = lgp->args.inode;
6141 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6142 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6143
6144 dprintk("--> %s\n", __func__);
8554116e 6145 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6146 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6147 put_nfs_open_context(lgp->args.ctx);
6148 kfree(calldata);
6149 dprintk("<-- %s\n", __func__);
6150}
6151
6152static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6153 .rpc_call_prepare = nfs4_layoutget_prepare,
6154 .rpc_call_done = nfs4_layoutget_done,
6155 .rpc_release = nfs4_layoutget_release,
6156};
6157
a0b0a6e3
TM		 6158struct pnfs_layout_segment *
6159nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6160{
a47970ff
WAA		 6161 struct inode *inode = lgp->args.inode;
6162 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6163 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6164 struct rpc_task *task;
6165 struct rpc_message msg = {
6166 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6167 .rpc_argp = &lgp->args,
6168 .rpc_resp = &lgp->res,
6169 };
6170 struct rpc_task_setup task_setup_data = {
6171 .rpc_client = server->client,
6172 .rpc_message = &msg,
6173 .callback_ops = &nfs4_layoutget_call_ops,
6174 .callback_data = lgp,
6175 .flags = RPC_TASK_ASYNC,
6176 };
a0b0a6e3 6177 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6178 int status = 0;
6179
6180 dprintk("--> %s\n", __func__);
6181
8554116e
IK		 6182 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6183 if (!lgp->args.layout.pages) {
6184 nfs4_layoutget_release(lgp);
a0b0a6e3 6185 return ERR_PTR(-ENOMEM);
8554116e
IK		 6186 }
6187 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6188 lgp->args.timestamp = jiffies;
8554116e 6189
35124a09 6190 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6191 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6192 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6193
6194 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6195 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6196
b1f69b75
AA		 6197 task = rpc_run_task(&task_setup_data);
6198 if (IS_ERR(task))
a0b0a6e3 6199 return ERR_CAST(task);
b1f69b75 6200 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6201 if (status == 0)
6202 status = task->tk_status;
085b7a45
WAA		 6203 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6204 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6205 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6206 rpc_put_task(task);
6207 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6208 if (status)
6209 return ERR_PTR(status);
6210 return lseg;
b1f69b75
AA		 6211}
6212
cbe82603
BH		 6213static void
6214nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6215{
6216 struct nfs4_layoutreturn *lrp = calldata;
6217
6218 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6219 nfs41_setup_sequence(lrp->clp->cl_session,
6220 &lrp->args.seq_args,
6221 &lrp->res.seq_res,
6222 task);
cbe82603
BH		 6223}
6224
6225static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6226{
6227 struct nfs4_layoutreturn *lrp = calldata;
6228 struct nfs_server *server;
6229
6230 dprintk("--> %s\n", __func__);
6231
6ba7db34 6232 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6233 return;
6234
6235 server = NFS_SERVER(lrp->args.inode);
6236 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6237 rpc_restart_call_prepare(task);
cbe82603
BH		 6238 return;
6239 }
cbe82603
BH		 6240 dprintk("<-- %s\n", __func__);
6241}
6242
6243static void nfs4_layoutreturn_release(void *calldata)
6244{
6245 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6246 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6247
6248 dprintk("--> %s\n", __func__);
849b286f
TM		 6249 spin_lock(&lo->plh_inode->i_lock);
6250 if (lrp->res.lrs_present)
6251 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6252 lo->plh_block_lgets--;
6253 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6254 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6255 kfree(calldata);
6256 dprintk("<-- %s\n", __func__);
6257}
6258
6259static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6260 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6261 .rpc_call_done = nfs4_layoutreturn_done,
6262 .rpc_release = nfs4_layoutreturn_release,
6263};
6264
6265int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6266{
6267 struct rpc_task *task;
6268 struct rpc_message msg = {
6269 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6270 .rpc_argp = &lrp->args,
6271 .rpc_resp = &lrp->res,
6272 };
6273 struct rpc_task_setup task_setup_data = {
6274 .rpc_client = lrp->clp->cl_rpcclient,
6275 .rpc_message = &msg,
6276 .callback_ops = &nfs4_layoutreturn_call_ops,
6277 .callback_data = lrp,
6278 };
6279 int status;
6280
6281 dprintk("--> %s\n", __func__);
9d12b216 6282 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6283 task = rpc_run_task(&task_setup_data);
6284 if (IS_ERR(task))
6285 return PTR_ERR(task);
6286 status = task->tk_status;
6287 dprintk("<-- %s status=%d\n", __func__, status);
6288 rpc_put_task(task);
6289 return status;
6290}
6291
7f11d8d3
AA		 6292/*
6293 * Retrieve the list of Data Server devices from the MDS.
6294 */
6295static int _nfs4_getdevicelist(struct nfs_server *server,
6296 const struct nfs_fh *fh,
6297 struct pnfs_devicelist *devlist)
6298{
6299 struct nfs4_getdevicelist_args args = {
6300 .fh = fh,
6301 .layoutclass = server->pnfs_curr_ld->id,
6302 };
6303 struct nfs4_getdevicelist_res res = {
6304 .devlist = devlist,
6305 };
6306 struct rpc_message msg = {
6307 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6308 .rpc_argp = &args,
6309 .rpc_resp = &res,
6310 };
6311 int status;
6312
6313 dprintk("--> %s\n", __func__);
6314 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6315 &res.seq_res, 0);
6316 dprintk("<-- %s status=%d\n", __func__, status);
6317 return status;
6318}
6319
6320int nfs4_proc_getdevicelist(struct nfs_server *server,
6321 const struct nfs_fh *fh,
6322 struct pnfs_devicelist *devlist)
6323{
6324 struct nfs4_exception exception = { };
6325 int err;
6326
6327 do {
6328 err = nfs4_handle_exception(server,
6329 _nfs4_getdevicelist(server, fh, devlist),
6330 &exception);
6331 } while (exception.retry);
6332
6333 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6334 err, devlist->num_devs);
6335
6336 return err;
6337}
6338EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6339
b1f69b75
AA		 6340static int
6341_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6342{
6343 struct nfs4_getdeviceinfo_args args = {
6344 .pdev = pdev,
6345 };
6346 struct nfs4_getdeviceinfo_res res = {
6347 .pdev = pdev,
6348 };
6349 struct rpc_message msg = {
6350 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6351 .rpc_argp = &args,
6352 .rpc_resp = &res,
6353 };
6354 int status;
6355
6356 dprintk("--> %s\n", __func__);
7c513058 6357 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6358 dprintk("<-- %s status=%d\n", __func__, status);
6359
6360 return status;
6361}
6362
6363int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6364{
6365 struct nfs4_exception exception = { };
6366 int err;
6367
6368 do {
6369 err = nfs4_handle_exception(server,
6370 _nfs4_proc_getdeviceinfo(server, pdev),
6371 &exception);
6372 } while (exception.retry);
6373 return err;
6374}
6375EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6376
863a3c6c
AA		 6377static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6378{
6379 struct nfs4_layoutcommit_data *data = calldata;
6380 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6381 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6382
d9afbd1b
TM		 6383 nfs41_setup_sequence(session,
6384 &data->args.seq_args,
6385 &data->res.seq_res,
6386 task);
863a3c6c
AA		 6387}
6388
6389static void
6390nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6391{
6392 struct nfs4_layoutcommit_data *data = calldata;
6393 struct nfs_server *server = NFS_SERVER(data->args.inode);
6394
6ba7db34 6395 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6396 return;
6397
6398 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6399 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6400 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6401 case -NFS4ERR_BADLAYOUT: /* no layout */
6402 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6403 task->tk_status = 0;
e59d27e0
TM		 6404 break;
6405 case 0:
863a3c6c
AA		 6406 nfs_post_op_update_inode_force_wcc(data->args.inode,
6407 data->res.fattr);
e59d27e0
TM		 6408 break;
6409 default:
6410 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6411 rpc_restart_call_prepare(task);
6412 return;
6413 }
6414 }
863a3c6c
AA		 6415}
6416
6417static void nfs4_layoutcommit_release(void *calldata)
6418{
6419 struct nfs4_layoutcommit_data *data = calldata;
6420
db29c089 6421 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 6422 put_rpccred(data->cred);
6423 kfree(data);
6424}
6425
6426static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6427 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6428 .rpc_call_done = nfs4_layoutcommit_done,
6429 .rpc_release = nfs4_layoutcommit_release,
6430};
6431
6432int
ef311537 6433nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6434{
6435 struct rpc_message msg = {
6436 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6437 .rpc_argp = &data->args,
6438 .rpc_resp = &data->res,
6439 .rpc_cred = data->cred,
6440 };
6441 struct rpc_task_setup task_setup_data = {
6442 .task = &data->task,
6443 .rpc_client = NFS_CLIENT(data->args.inode),
6444 .rpc_message = &msg,
6445 .callback_ops = &nfs4_layoutcommit_ops,
6446 .callback_data = data,
6447 .flags = RPC_TASK_ASYNC,
6448 };
6449 struct rpc_task *task;
6450 int status = 0;
6451
6452 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6453 "lbw: %llu inode %lu\n",
6454 data->task.tk_pid, sync,
6455 data->args.lastbytewritten,
6456 data->args.inode->i_ino);
6457
9d12b216 6458 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6459 task = rpc_run_task(&task_setup_data);
6460 if (IS_ERR(task))
6461 return PTR_ERR(task);
ef311537 6462 if (sync == false)
863a3c6c
AA		 6463 goto out;
6464 status = nfs4_wait_for_completion_rpc_task(task);
6465 if (status != 0)
6466 goto out;
6467 status = task->tk_status;
6468out:
6469 dprintk("%s: status %d\n", __func__, status);
6470 rpc_put_task(task);
6471 return status;
6472}
fca78d6d
BS		 6473
6474static int
6475_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6476 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6477{
6478 struct nfs41_secinfo_no_name_args args = {
6479 .style = SECINFO_STYLE_CURRENT_FH,
6480 };
6481 struct nfs4_secinfo_res res = {
6482 .flavors = flavors,
6483 };
6484 struct rpc_message msg = {
6485 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6486 .rpc_argp = &args,
6487 .rpc_resp = &res,
6488 };
6489 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6490}
6491
6492static int
6493nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6494 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6495{
6496 struct nfs4_exception exception = { };
6497 int err;
6498 do {
6499 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6500 switch (err) {
6501 case 0:
6502 case -NFS4ERR_WRONGSEC:
6503 case -NFS4ERR_NOTSUPP:
05e9cfb4 6504 goto out;
fca78d6d
BS		 6505 default:
6506 err = nfs4_handle_exception(server, err, &exception);
6507 }
6508 } while (exception.retry);
05e9cfb4 6509out:
fca78d6d
BS		 6510 return err;
6511}
6512
6513static int
6514nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6515 struct nfs_fsinfo *info)
6516{
6517 int err;
6518 struct page *page;
6519 rpc_authflavor_t flavor;
6520 struct nfs4_secinfo_flavors *flavors;
6521
6522 page = alloc_page(GFP_KERNEL);
6523 if (!page) {
6524 err = -ENOMEM;
6525 goto out;
6526 }
6527
6528 flavors = page_address(page);
6529 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6530
6531 /*
6532 * Fall back on "guess and check" method if
6533 * the server doesn't support SECINFO_NO_NAME
6534 */
6535 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6536 err = nfs4_find_root_sec(server, fhandle, info);
6537 goto out_freepage;
6538 }
6539 if (err)
6540 goto out_freepage;
6541
6542 flavor = nfs_find_best_sec(flavors);
6543 if (err == 0)
6544 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6545
6546out_freepage:
6547 put_page(page);
6548 if (err == -EACCES)
6549 return -EPERM;
6550out:
6551 return err;
6552}
1cab0652
BS		 6553
6554static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6555{
6556 int status;
6557 struct nfs41_test_stateid_args args = {
1cab0652 6558 .stateid = stateid,
7d974794
BS		 6559 };
6560 struct nfs41_test_stateid_res res;
6561 struct rpc_message msg = {
6562 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6563 .rpc_argp = &args,
6564 .rpc_resp = &res,
6565 };
1cab0652 6566
38527b15 6567 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6568 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6569 nfs4_set_sequence_privileged(&args.seq_args);
6570 status = nfs4_call_sync_sequence(server->client, server, &msg,
6571 &args.seq_args, &res.seq_res);
38527b15
CL		 6572 if (status != NFS_OK) {
6573 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6574 return status;
38527b15
CL		 6575 }
6576 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6577 return -res.status;
7d974794
BS		 6578}
6579
38527b15
CL		 6580/**
6581 * nfs41_test_stateid - perform a TEST_STATEID operation
6582 *
6583 * @server: server / transport on which to perform the operation
6584 * @stateid: state ID to test
6585 *
6586 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6587 * Otherwise a negative NFS4ERR value is returned if the operation
6588 * failed or the state ID is not currently valid.
6589 */
1cab0652 6590static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6591{
6592 struct nfs4_exception exception = { };
6593 int err;
6594 do {
377e507d
CL		 6595 err = _nfs41_test_stateid(server, stateid);
6596 if (err != -NFS4ERR_DELAY)
6597 break;
6598 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6599 } while (exception.retry);
6600 return err;
6601}
9aeda35f 6602
1cab0652 6603static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6604{
9aeda35f 6605 struct nfs41_free_stateid_args args = {
1cab0652 6606 .stateid = stateid,
9aeda35f
BS		 6607 };
6608 struct nfs41_free_stateid_res res;
6609 struct rpc_message msg = {
6610 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6611 .rpc_argp = &args,
6612 .rpc_resp = &res,
6613 };
38527b15 6614 int status;
9aeda35f 6615
38527b15 6616 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6617 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 6618 nfs4_set_sequence_privileged(&args.seq_args);
38527b15 6619 status = nfs4_call_sync_sequence(server->client, server, &msg,
8fe72bac 6620 &args.seq_args, &res.seq_res);
38527b15
CL		 6621 dprintk("NFS reply free_stateid: %d\n", status);
6622 return status;
9aeda35f
BS		 6623}
6624
38527b15
CL		 6625/**
6626 * nfs41_free_stateid - perform a FREE_STATEID operation
6627 *
6628 * @server: server / transport on which to perform the operation
6629 * @stateid: state ID to release
6630 *
6631 * Returns NFS_OK if the server freed "stateid". Otherwise a
6632 * negative NFS4ERR value is returned.
6633 */
1cab0652 6634static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6635{
6636 struct nfs4_exception exception = { };
6637 int err;
6638 do {
377e507d
CL		 6639 err = _nfs4_free_stateid(server, stateid);
6640 if (err != -NFS4ERR_DELAY)
6641 break;
6642 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6643 } while (exception.retry);
6644 return err;
6645}
36281caa
TM		 6646
6647static bool nfs41_match_stateid(const nfs4_stateid *s1,
6648 const nfs4_stateid *s2)
6649{
2d2f24ad 6650 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6651 return false;
6652
2d2f24ad 6653 if (s1->seqid == s2->seqid)
36281caa 6654 return true;
2d2f24ad 6655 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6656 return true;
6657
6658 return false;
6659}
6660
557134a3
AA		 6661#endif /* CONFIG_NFS_V4_1 */
6662
36281caa
TM		 6663static bool nfs4_match_stateid(const nfs4_stateid *s1,
6664 const nfs4_stateid *s2)
6665{
f597c537 6666 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6667}
6668
6669
17280175 6670static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6671 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6672 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6673 .recover_open = nfs4_open_reclaim,
6674 .recover_lock = nfs4_lock_reclaim,
591d71cb 6675 .establish_clid = nfs4_init_clientid,
90a16617 6676 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6677 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6678};
6679
591d71cb 6680#if defined(CONFIG_NFS_V4_1)
17280175 6681static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6682 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6683 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6684 .recover_open = nfs4_open_reclaim,
6685 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6686 .establish_clid = nfs41_init_clientid,
b4b82607 6687 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6688 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6689 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6690};
6691#endif /* CONFIG_NFS_V4_1 */
6692
17280175 6693static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6694 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6695 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6696 .recover_open = nfs4_open_expired,
6697 .recover_lock = nfs4_lock_expired,
6698 .establish_clid = nfs4_init_clientid,
90a16617 6699 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6700};
6701
6702#if defined(CONFIG_NFS_V4_1)
17280175 6703static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6704 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6705 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6706 .recover_open = nfs41_open_expired,
6707 .recover_lock = nfs41_lock_expired,
4d643d1d 6708 .establish_clid = nfs41_init_clientid,
b4b82607 6709 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6710};
591d71cb 6711#endif /* CONFIG_NFS_V4_1 */
1da177e4 6712
17280175 6713static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6714 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6715 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6716 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6717};
6718
6719#if defined(CONFIG_NFS_V4_1)
17280175 6720static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6721 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6722 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6723 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6724};
6725#endif
6726
97dc1359
TM		 6727static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6728 .minor_version = 0,
6729 .call_sync = _nfs4_call_sync,
36281caa 6730 .match_stateid = nfs4_match_stateid,
fca78d6d 6731 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6732 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6733 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6734 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6735};
6736
6737#if defined(CONFIG_NFS_V4_1)
6738static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6739 .minor_version = 1,
104287cd 6740 .call_sync = nfs4_call_sync_sequence,
36281caa 6741 .match_stateid = nfs41_match_stateid,
fca78d6d 6742 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6743 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6744 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6745 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6746};
6747#endif
6748
97dc1359
TM		 6749const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6750 [0] = &nfs_v4_0_minor_ops,
6751#if defined(CONFIG_NFS_V4_1)
6752 [1] = &nfs_v4_1_minor_ops,
6753#endif
6754};
6755
73a79706
BS		 6756const struct inode_operations nfs4_dir_inode_operations = {
6757 .create = nfs_create,
6758 .lookup = nfs_lookup,
6759 .atomic_open = nfs_atomic_open,
6760 .link = nfs_link,
6761 .unlink = nfs_unlink,
6762 .symlink = nfs_symlink,
6763 .mkdir = nfs_mkdir,
6764 .rmdir = nfs_rmdir,
6765 .mknod = nfs_mknod,
6766 .rename = nfs_rename,
6767 .permission = nfs_permission,
6768 .getattr = nfs_getattr,
6769 .setattr = nfs_setattr,
6770 .getxattr = generic_getxattr,
6771 .setxattr = generic_setxattr,
6772 .listxattr = generic_listxattr,
6773 .removexattr = generic_removexattr,
6774};
6775
92e1d5be 6776static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6777 .permission = nfs_permission,
6778 .getattr = nfs_getattr,
6779 .setattr = nfs_setattr,
64c2ce8b
AK		 6780 .getxattr = generic_getxattr,
6781 .setxattr = generic_setxattr,
6782 .listxattr = generic_listxattr,
6783 .removexattr = generic_removexattr,
6b3b5496
BF		 6784};
6785
509de811 6786const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6787 .version = 4, /* protocol version */
6788 .dentry_ops = &nfs4_dentry_operations,
6789 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6790 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6791 .file_ops = &nfs4_file_operations,
1da177e4 6792 .getroot = nfs4_proc_get_root,
281cad46 6793 .submount = nfs4_submount,
ff9099f2 6794 .try_mount = nfs4_try_mount,
1da177e4
LT		 6795 .getattr = nfs4_proc_getattr,
6796 .setattr = nfs4_proc_setattr,
6797 .lookup = nfs4_proc_lookup,
6798 .access = nfs4_proc_access,
6799 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6800 .create = nfs4_proc_create,
6801 .remove = nfs4_proc_remove,
6802 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6803 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6804 .unlink_done = nfs4_proc_unlink_done,
6805 .rename = nfs4_proc_rename,
d3d4152a 6806 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6807 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6808 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6809 .link = nfs4_proc_link,
6810 .symlink = nfs4_proc_symlink,
6811 .mkdir = nfs4_proc_mkdir,
6812 .rmdir = nfs4_proc_remove,
6813 .readdir = nfs4_proc_readdir,
6814 .mknod = nfs4_proc_mknod,
6815 .statfs = nfs4_proc_statfs,
6816 .fsinfo = nfs4_proc_fsinfo,
6817 .pathconf = nfs4_proc_pathconf,
e9326dca 6818 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6819 .decode_dirent = nfs4_decode_dirent,
6820 .read_setup = nfs4_proc_read_setup,
1abb5088 6821 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 6822 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6823 .read_done = nfs4_read_done,
1da177e4 6824 .write_setup = nfs4_proc_write_setup,
57208fa7 6825 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 6826 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6827 .write_done = nfs4_write_done,
1da177e4 6828 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 6829 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 6830 .commit_done = nfs4_commit_done,
1da177e4 6831 .lock = nfs4_proc_lock,
e50a1c2e 6832 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6833 .close_context = nfs4_close_context,
2b484297 6834 .open_context = nfs4_atomic_open,
011e2a7f 6835 .have_delegation = nfs4_have_delegation,
57ec14c5 6836 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 6837 .alloc_client = nfs4_alloc_client,
45a52a02 6838 .init_client = nfs4_init_client,
cdb7eced 6839 .free_client = nfs4_free_client,
1179acc6
BS		 6840 .create_server = nfs4_create_server,
6841 .clone_server = nfs_clone_server,
1da177e4
LT		 6842};
6843
64c2ce8b
AK		 6844static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6845 .prefix = XATTR_NAME_NFSV4_ACL,
6846 .list = nfs4_xattr_list_nfs4_acl,
6847 .get = nfs4_xattr_get_nfs4_acl,
6848 .set = nfs4_xattr_set_nfs4_acl,
6849};
6850
6851const struct xattr_handler *nfs4_xattr_handlers[] = {
6852 &nfs4_xattr_nfs4_acl_handler,
6853 NULL
6854};
6855
1da177e4
LT		 6856/*
6857 * Local variables:
6858 * c-basic-offset: 8
6859 * End:
6860 */
Linux kernel - Deliverables
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