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NFSv4.1: Fix an ABBA locking issue with session and state serialisation
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4
LT		 68
69#define NFSDBG_FACILITY NFSDBG_PROC
70
2066fe89 71#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 72#define NFS4_POLL_RETRY_MAX (15*HZ)
73
cdd4e68b 74struct nfs4_opendata;
864472e9 75static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 76static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 77static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 78static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 79static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
bae36241 80static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
9936781d 81static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 82static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
83 struct nfs_fattr *fattr, struct iattr *sattr,
84 struct nfs4_state *state);
f062eb6c 85#ifdef CONFIG_NFS_V4_1
1cab0652
BS		 86static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
87static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
f062eb6c 88#endif
1da177e4 89/* Prevent leaks of NFSv4 errors into userland */
46f72f57 90static int nfs4_map_errors(int err)
1da177e4 91{
52567b03
TM		 92 if (err >= -1000)
93 return err;
94 switch (err) {
95 case -NFS4ERR_RESOURCE:
96 return -EREMOTEIO;
7ebb9315
BS		 97 case -NFS4ERR_WRONGSEC:
98 return -EPERM;
3ddeb7c5
TM		 99 case -NFS4ERR_BADOWNER:
100 case -NFS4ERR_BADNAME:
101 return -EINVAL;
fb13bfa7
TM		 102 case -NFS4ERR_SHARE_DENIED:
103 return -EACCES;
f25efd85
SD		 104 case -NFS4ERR_MINOR_VERS_MISMATCH:
105 return -EPROTONOSUPPORT;
6168f62c
WAA		 106 case -NFS4ERR_ACCESS:
107 return -EACCES;
52567b03 108 default:
1da177e4 109 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 110 __func__, -err);
52567b03 111 break;
1da177e4 112 }
52567b03 113 return -EIO;
1da177e4
LT		 114}
115
116/*
117 * This is our standard bitmap for GETATTR requests.
118 */
1549210f 119const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 120 FATTR4_WORD0_TYPE
121 | FATTR4_WORD0_CHANGE
122 | FATTR4_WORD0_SIZE
123 | FATTR4_WORD0_FSID
124 | FATTR4_WORD0_FILEID,
125 FATTR4_WORD1_MODE
126 | FATTR4_WORD1_NUMLINKS
127 | FATTR4_WORD1_OWNER
128 | FATTR4_WORD1_OWNER_GROUP
129 | FATTR4_WORD1_RAWDEV
130 | FATTR4_WORD1_SPACE_USED
131 | FATTR4_WORD1_TIME_ACCESS
132 | FATTR4_WORD1_TIME_METADATA
133 | FATTR4_WORD1_TIME_MODIFY
134};
135
1549210f
TM		 136static const u32 nfs4_pnfs_open_bitmap[3] = {
137 FATTR4_WORD0_TYPE
138 | FATTR4_WORD0_CHANGE
139 | FATTR4_WORD0_SIZE
140 | FATTR4_WORD0_FSID
141 | FATTR4_WORD0_FILEID,
142 FATTR4_WORD1_MODE
143 | FATTR4_WORD1_NUMLINKS
144 | FATTR4_WORD1_OWNER
145 | FATTR4_WORD1_OWNER_GROUP
146 | FATTR4_WORD1_RAWDEV
147 | FATTR4_WORD1_SPACE_USED
148 | FATTR4_WORD1_TIME_ACCESS
149 | FATTR4_WORD1_TIME_METADATA
150 | FATTR4_WORD1_TIME_MODIFY,
151 FATTR4_WORD2_MDSTHRESHOLD
152};
153
e23008ec
AA		 154static const u32 nfs4_open_noattr_bitmap[3] = {
155 FATTR4_WORD0_TYPE
156 | FATTR4_WORD0_CHANGE
157 | FATTR4_WORD0_FILEID,
158};
159
1da177e4
LT		 160const u32 nfs4_statfs_bitmap[2] = {
161 FATTR4_WORD0_FILES_AVAIL
162 | FATTR4_WORD0_FILES_FREE
163 | FATTR4_WORD0_FILES_TOTAL,
164 FATTR4_WORD1_SPACE_AVAIL
165 | FATTR4_WORD1_SPACE_FREE
166 | FATTR4_WORD1_SPACE_TOTAL
167};
168
4ce79717 169const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 170 FATTR4_WORD0_MAXLINK
171 | FATTR4_WORD0_MAXNAME,
172 0
173};
174
dae100c2 175const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 176 | FATTR4_WORD0_MAXREAD
177 | FATTR4_WORD0_MAXWRITE
178 | FATTR4_WORD0_LEASE_TIME,
55b6e774 179 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 180 | FATTR4_WORD1_FS_LAYOUT_TYPES,
181 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 182};
183
830b8e33
MN		 184const u32 nfs4_fs_locations_bitmap[2] = {
185 FATTR4_WORD0_TYPE
186 | FATTR4_WORD0_CHANGE
187 | FATTR4_WORD0_SIZE
188 | FATTR4_WORD0_FSID
189 | FATTR4_WORD0_FILEID
190 | FATTR4_WORD0_FS_LOCATIONS,
191 FATTR4_WORD1_MODE
192 | FATTR4_WORD1_NUMLINKS
193 | FATTR4_WORD1_OWNER
194 | FATTR4_WORD1_OWNER_GROUP
195 | FATTR4_WORD1_RAWDEV
196 | FATTR4_WORD1_SPACE_USED
197 | FATTR4_WORD1_TIME_ACCESS
198 | FATTR4_WORD1_TIME_METADATA
199 | FATTR4_WORD1_TIME_MODIFY
200 | FATTR4_WORD1_MOUNTED_ON_FILEID
201};
202
bc4785cd 203static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 204 struct nfs4_readdir_arg *readdir)
205{
0dbb4c67 206 __be32 *start, *p;
1da177e4 207
1da177e4 208 if (cookie > 2) {
b7ef1956 209 readdir->cookie = cookie;
1da177e4
LT		 210 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
211 return;
212 }
213
214 readdir->cookie = 0;
215 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
216 if (cookie == 2)
217 return;
218
219 /*
220 * NFSv4 servers do not return entries for '.' and '..'
221 * Therefore, we fake these entries here. We let '.'
222 * have cookie 0 and '..' have cookie 1. Note that
223 * when talking to the server, we always send cookie 0
224 * instead of 1 or 2.
225 */
2b86ce2d 226 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 227
228 if (cookie == 0) {
229 *p++ = xdr_one; /* next */
230 *p++ = xdr_zero; /* cookie, first word */
231 *p++ = xdr_one; /* cookie, second word */
232 *p++ = xdr_one; /* entry len */
233 memcpy(p, ".\0\0\0", 4); /* entry */
234 p++;
235 *p++ = xdr_one; /* bitmap length */
236 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
237 *p++ = htonl(8); /* attribute buffer length */
4e769b93 238 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 239 }
240
241 *p++ = xdr_one; /* next */
242 *p++ = xdr_zero; /* cookie, first word */
243 *p++ = xdr_two; /* cookie, second word */
244 *p++ = xdr_two; /* entry len */
245 memcpy(p, "..\0\0", 4); /* entry */
246 p++;
247 *p++ = xdr_one; /* bitmap length */
248 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
249 *p++ = htonl(8); /* attribute buffer length */
4e769b93 250 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 251
252 readdir->pgbase = (char *)p - (char *)start;
253 readdir->count -= readdir->pgbase;
2b86ce2d 254 kunmap_atomic(start);
1da177e4
LT		 255}
256
65de872e
TM		 257static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
258{
259 int res = 0;
260
261 might_sleep();
262
263 if (*timeout <= 0)
264 *timeout = NFS4_POLL_RETRY_MIN;
265 if (*timeout > NFS4_POLL_RETRY_MAX)
266 *timeout = NFS4_POLL_RETRY_MAX;
d310310c 267 freezable_schedule_timeout_killable(*timeout);
65de872e
TM		 268 if (fatal_signal_pending(current))
269 res = -ERESTARTSYS;
270 *timeout <<= 1;
271 return res;
272}
273
274/* This is the error handling routine for processes that are allowed
275 * to sleep.
276 */
b064eca2 277static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 278{
279 struct nfs_client *clp = server->nfs_client;
9e33bed5 280 struct nfs4_state *state = exception->state;
3114ea7a 281 struct inode *inode = exception->inode;
65de872e
TM		 282 int ret = errorcode;
283
284 exception->retry = 0;
285 switch(errorcode) {
286 case 0:
287 return 0;
3114ea7a 288 case -NFS4ERR_OPENMODE:
011e2a7f 289 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 290 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 291 exception->retry = 1;
292 return 0;
293 }
294 if (state == NULL)
295 break;
296 nfs4_schedule_stateid_recovery(server, state);
297 goto wait_on_recovery;
a1d0b5ee 298 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 299 case -NFS4ERR_ADMIN_REVOKED:
300 case -NFS4ERR_BAD_STATEID:
9e33bed5
TM		 301 if (state == NULL)
302 break;
14977489 303 nfs_remove_bad_delegation(state->inode);
0400a6b0
TM		 304 nfs4_schedule_stateid_recovery(server, state);
305 goto wait_on_recovery;
0ced63d1
TM		 306 case -NFS4ERR_EXPIRED:
307 if (state != NULL)
308 nfs4_schedule_stateid_recovery(server, state);
65de872e 309 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 310 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 311 nfs4_schedule_lease_recovery(clp);
312 goto wait_on_recovery;
03391693 313#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 314 case -NFS4ERR_BADSESSION:
315 case -NFS4ERR_BADSLOT:
316 case -NFS4ERR_BAD_HIGH_SLOT:
317 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
318 case -NFS4ERR_DEADSESSION:
319 case -NFS4ERR_SEQ_FALSE_RETRY:
320 case -NFS4ERR_SEQ_MISORDERED:
321 dprintk("%s ERROR: %d Reset session\n", __func__,
322 errorcode);
9f594791 323 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 324 goto wait_on_recovery;
03391693 325#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 326 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 327 if (exception->timeout > HZ) {
328 /* We have retried a decent amount, time to
329 * fail
330 */
331 ret = -EBUSY;
332 break;
333 }
65de872e
TM		 334 case -NFS4ERR_GRACE:
335 case -NFS4ERR_DELAY:
336 ret = nfs4_delay(server->client, &exception->timeout);
337 if (ret != 0)
338 break;
a8a4ae3a 339 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 340 case -NFS4ERR_OLD_STATEID:
341 exception->retry = 1;
b064eca2
TM		 342 break;
343 case -NFS4ERR_BADOWNER:
344 /* The following works around a Linux server bug! */
345 case -NFS4ERR_BADNAME:
346 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
347 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
348 exception->retry = 1;
349 printk(KERN_WARNING "NFS: v4 server %s "
350 "does not accept raw "
351 "uid/gids. "
352 "Reenabling the idmapper.\n",
353 server->nfs_client->cl_hostname);
354 }
65de872e
TM		 355 }
356 /* We failed to handle the error */
357 return nfs4_map_errors(ret);
0400a6b0 358wait_on_recovery:
a2c0b9e2
TM		 359 ret = nfs4_wait_clnt_recover(clp);
360 if (ret == 0)
361 exception->retry = 1;
362 return ret;
65de872e
TM		 363}
364
365
452e9352 366static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 367{
1da177e4
LT		 368 spin_lock(&clp->cl_lock);
369 if (time_before(clp->cl_last_renewal,timestamp))
370 clp->cl_last_renewal = timestamp;
371 spin_unlock(&clp->cl_lock);
372}
373
452e9352
TM		 374static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
375{
376 do_renew_lease(server->nfs_client, timestamp);
377}
378
cccef3b9
AA		 379#if defined(CONFIG_NFS_V4_1)
380
d185a334 381static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 382{
e3725ec0 383 struct nfs4_session *session;
13615871 384 struct nfs4_slot_table *tbl;
c10e4498 385 bool send_new_highest_used_slotid = false;
13615871 386
dfb4f309 387 if (!res->sr_slot) {
13615871
AA		 388 /* just wake up the next guy waiting since
389 * we may have not consumed a slot after all */
691daf3b 390 dprintk("%s: No slot\n", __func__);
35dc1d74 391 return;
13615871 392 }
e3725ec0
TM		 393 tbl = res->sr_slot->table;
394 session = tbl->session;
ea028ac9 395
35dc1d74 396 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 397 /* Be nice to the server: try to ensure that the last transmitted
398 * value for highest_user_slotid <= target_highest_slotid
399 */
400 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
401 send_new_highest_used_slotid = true;
402
b75ad4cd
TM		 403 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
404 send_new_highest_used_slotid = false;
405 goto out_unlock;
406 }
f4af6e2a 407 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 408
409 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
410 send_new_highest_used_slotid = false;
b75ad4cd 411out_unlock:
35dc1d74 412 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 413 res->sr_slot = NULL;
c10e4498
TM		 414 if (send_new_highest_used_slotid)
415 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 416}
417
14516c3a 418static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 419{
e3725ec0 420 struct nfs4_session *session;
933602e3 421 struct nfs4_slot *slot;
14516c3a 422 struct nfs_client *clp;
ac20d163 423 bool interrupted = false;
85563073 424 int ret = 1;
b0df806c 425
468f8613
BS		 426 /* don't increment the sequence number if the task wasn't sent */
427 if (!RPC_WAS_SENT(task))
b0df806c
AA		 428 goto out;
429
933602e3 430 slot = res->sr_slot;
e3725ec0 431 session = slot->table->session;
933602e3 432
ac20d163
TM		 433 if (slot->interrupted) {
434 slot->interrupted = 0;
435 interrupted = true;
436 }
437
691daf3b 438 /* Check the SEQUENCE operation status */
14516c3a
TM		 439 switch (res->sr_status) {
440 case 0:
b0df806c 441 /* Update the slot's sequence and clientid lease timer */
933602e3 442 ++slot->seq_nr;
e3725ec0 443 clp = session->clp;
8e63b6a8 444 do_renew_lease(clp, res->sr_timestamp);
0629e370 445 /* Check sequence flags */
b4410c2f
TM		 446 if (res->sr_status_flags != 0)
447 nfs4_schedule_lease_recovery(clp);
464ee9f9 448 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 449 break;
ac20d163
TM		 450 case 1:
451 /*
452 * sr_status remains 1 if an RPC level error occurred.
453 * The server may or may not have processed the sequence
454 * operation..
455 * Mark the slot as having hosted an interrupted RPC call.
456 */
457 slot->interrupted = 1;
458 goto out;
14516c3a
TM		 459 case -NFS4ERR_DELAY:
460 /* The server detected a resend of the RPC call and
461 * returned NFS4ERR_DELAY as per Section 2.10.6.2
462 * of RFC5661.
463 */
df2fabff 464 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 465 __func__,
df2fabff 466 slot->slot_nr,
933602e3 467 slot->seq_nr);
14516c3a 468 goto out_retry;
85563073
TM		 469 case -NFS4ERR_BADSLOT:
470 /*
471 * The slot id we used was probably retired. Try again
472 * using a different slot id.
473 */
e8794440
TM		 474 goto retry_nowait;
475 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 476 /*
477 * Was the last operation on this sequence interrupted?
478 * If so, retry after bumping the sequence number.
479 */
480 if (interrupted) {
481 ++slot->seq_nr;
482 goto retry_nowait;
483 }
e8794440
TM		 484 /*
485 * Could this slot have been previously retired?
486 * If so, then the server may be expecting seq_nr = 1!
487 */
8e63b6a8
TM		 488 if (slot->seq_nr != 1) {
489 slot->seq_nr = 1;
490 goto retry_nowait;
491 }
492 break;
e8794440
TM		 493 case -NFS4ERR_SEQ_FALSE_RETRY:
494 ++slot->seq_nr;
495 goto retry_nowait;
14516c3a
TM		 496 default:
497 /* Just update the slot sequence no. */
933602e3 498 ++slot->seq_nr;
b0df806c
AA		 499 }
500out:
501 /* The session may be reset by one of the error handlers. */
502 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 503 nfs41_sequence_free_slot(res);
85563073 504 return ret;
e8794440
TM		 505retry_nowait:
506 if (rpc_restart_call_prepare(task)) {
507 task->tk_status = 0;
508 ret = 0;
509 }
510 goto out;
14516c3a 511out_retry:
d05dd4e9 512 if (!rpc_restart_call(task))
14516c3a
TM		 513 goto out;
514 rpc_delay(task, NFS4_POLL_RETRY_MAX);
515 return 0;
b0df806c
AA		 516}
517
14516c3a
TM		 518static int nfs4_sequence_done(struct rpc_task *task,
519 struct nfs4_sequence_res *res)
df896455 520{
e3725ec0 521 if (res->sr_slot == NULL)
14516c3a
TM		 522 return 1;
523 return nfs41_sequence_done(task, res);
df896455
TM		 524}
525
9d12b216
TM		 526static void nfs41_init_sequence(struct nfs4_sequence_args *args,
527 struct nfs4_sequence_res *res, int cache_reply)
528{
2b2fa717 529 args->sa_slot = NULL;
9d12b216 530 args->sa_cache_this = 0;
8fe72bac 531 args->sa_privileged = 0;
9d12b216
TM		 532 if (cache_reply)
533 args->sa_cache_this = 1;
9d12b216
TM		 534 res->sr_slot = NULL;
535}
536
8fe72bac
TM		 537static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
538{
539 args->sa_privileged = 1;
540}
541
dc70d7b3 542int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 543 struct nfs4_sequence_args *args,
544 struct nfs4_sequence_res *res,
ce5039c1
AA		 545 struct rpc_task *task)
546{
fbcd4abc
AA		 547 struct nfs4_slot *slot;
548 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 549
550 dprintk("--> %s\n", __func__);
ce5039c1 551 /* slot already allocated? */
dfb4f309 552 if (res->sr_slot != NULL)
d9afbd1b 553 goto out_success;
ce5039c1 554
fbcd4abc
AA		 555 tbl = &session->fc_slot_table;
556
69d206b5
TM		 557 task->tk_timeout = 0;
558
fbcd4abc 559 spin_lock(&tbl->slot_tbl_lock);
a2118c33 560 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
8fe72bac 561 !args->sa_privileged) {
0b1c8fc4 562 /* The state manager will wait until the slot table is empty */
0b1c8fc4 563 dprintk("%s session is draining\n", __func__);
7b939a3f 564 goto out_sleep;
689cf5c1
AB		 565 }
566
2dc03b7f 567 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 568 if (IS_ERR(slot)) {
569 /* If out of memory, try again in 1/4 second */
570 if (slot == ERR_PTR(-ENOMEM))
571 task->tk_timeout = HZ >> 2;
fbcd4abc 572 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 573 goto out_sleep;
fbcd4abc
AA		 574 }
575 spin_unlock(&tbl->slot_tbl_lock);
576
2b2fa717 577 args->sa_slot = slot;
fbcd4abc 578
2dc03b7f
TM		 579 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
580 slot->slot_nr, slot->seq_nr);
fbcd4abc 581
dfb4f309 582 res->sr_slot = slot;
8e63b6a8 583 res->sr_timestamp = jiffies;
2a6e26cd 584 res->sr_status_flags = 0;
fbcd4abc
AA		 585 /*
586 * sr_status is only set in decode_sequence, and so will remain
587 * set to 1 if an rpc level failure occurs.
588 */
589 res->sr_status = 1;
d9afbd1b
TM		 590out_success:
591 rpc_call_start(task);
ce5039c1 592 return 0;
7b939a3f 593out_sleep:
8fe72bac
TM		 594 /* Privileged tasks are queued with top priority */
595 if (args->sa_privileged)
1e1093c7
TM		 596 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
597 NULL, RPC_PRIORITY_PRIVILEGED);
598 else
599 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 600 spin_unlock(&tbl->slot_tbl_lock);
601 return -EAGAIN;
ce5039c1 602}
dc70d7b3 603EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 604
035168ab 605int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 606 struct nfs4_sequence_args *args,
607 struct nfs4_sequence_res *res,
ce5039c1
AA		 608 struct rpc_task *task)
609{
035168ab 610 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 611 int ret = 0;
612
d9afbd1b
TM		 613 if (session == NULL) {
614 rpc_call_start(task);
035168ab 615 goto out;
d9afbd1b 616 }
035168ab 617
df2fabff 618 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 619 __func__, session->clp, session, res->sr_slot ?
df2fabff 620 res->sr_slot->slot_nr : -1);
ce5039c1 621
9d12b216 622 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 623out:
624 dprintk("<-- %s status=%d\n", __func__, ret);
625 return ret;
626}
627
628struct nfs41_call_sync_data {
035168ab 629 const struct nfs_server *seq_server;
ce5039c1
AA		 630 struct nfs4_sequence_args *seq_args;
631 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 632};
633
634static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
635{
636 struct nfs41_call_sync_data *data = calldata;
6ba7db34 637 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 638
035168ab
TM		 639 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
640
d9afbd1b 641 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 642}
643
69ab40c4
AA		 644static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
645{
646 struct nfs41_call_sync_data *data = calldata;
647
14516c3a 648 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 649}
650
17280175 651static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 652 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 653 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 654};
655
7c513058
BS		 656static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
657 struct nfs_server *server,
ce5039c1
AA		 658 struct rpc_message *msg,
659 struct nfs4_sequence_args *args,
8fe72bac 660 struct nfs4_sequence_res *res)
ce5039c1
AA		 661{
662 int ret;
663 struct rpc_task *task;
664 struct nfs41_call_sync_data data = {
035168ab 665 .seq_server = server,
ce5039c1
AA		 666 .seq_args = args,
667 .seq_res = res,
ce5039c1
AA		 668 };
669 struct rpc_task_setup task_setup = {
7c513058 670 .rpc_client = clnt,
ce5039c1
AA		 671 .rpc_message = msg,
672 .callback_ops = &nfs41_call_sync_ops,
673 .callback_data = &data
674 };
675
ce5039c1
AA		 676 task = rpc_run_task(&task_setup);
677 if (IS_ERR(task))
678 ret = PTR_ERR(task);
679 else {
680 ret = task->tk_status;
681 rpc_put_task(task);
682 }
683 return ret;
684}
685
df896455 686#else
8fe72bac 687static
9d12b216
TM		 688void nfs41_init_sequence(struct nfs4_sequence_args *args,
689 struct nfs4_sequence_res *res, int cache_reply)
690{
691}
692
8fe72bac
TM		 693static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
694{
695}
696
697
14516c3a
TM		 698static int nfs4_sequence_done(struct rpc_task *task,
699 struct nfs4_sequence_res *res)
df896455 700{
14516c3a 701 return 1;
df896455 702}
cccef3b9
AA		 703#endif /* CONFIG_NFS_V4_1 */
704
fd0c0953 705static
7c513058
BS		 706int _nfs4_call_sync(struct rpc_clnt *clnt,
707 struct nfs_server *server,
cccef3b9
AA		 708 struct rpc_message *msg,
709 struct nfs4_sequence_args *args,
fd0c0953 710 struct nfs4_sequence_res *res)
cccef3b9 711{
7c513058 712 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 713}
714
fd0c0953 715static
7c513058
BS		 716int nfs4_call_sync(struct rpc_clnt *clnt,
717 struct nfs_server *server,
e73b83f2
BS		 718 struct rpc_message *msg,
719 struct nfs4_sequence_args *args,
720 struct nfs4_sequence_res *res,
721 int cache_reply)
722{
fd0c0953 723 nfs41_init_sequence(args, res, cache_reply);
7c513058 724 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
fd0c0953 725 args, res);
e73b83f2 726}
cccef3b9 727
38478b24 728static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 729{
38478b24 730 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 731
38478b24 732 spin_lock(&dir->i_lock);
359d7d1c 733 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 734 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 735 nfs_force_lookup_revalidate(dir);
a9a4a87a 736 dir->i_version = cinfo->after;
de242c0b 737 nfs_fscache_invalidate(dir);
38478b24 738 spin_unlock(&dir->i_lock);
1da177e4
LT		 739}
740
e56e0b78 741struct nfs4_opendata {
c6d00e63 742 struct kref kref;
e56e0b78
TM		 743 struct nfs_openargs o_arg;
744 struct nfs_openres o_res;
cdd4e68b
TM		 745 struct nfs_open_confirmargs c_arg;
746 struct nfs_open_confirmres c_res;
6926afd1
TM		 747 struct nfs4_string owner_name;
748 struct nfs4_string group_name;
e56e0b78 749 struct nfs_fattr f_attr;
e56e0b78 750 struct dentry *dir;
82a2c1b7 751 struct dentry *dentry;
e56e0b78 752 struct nfs4_state_owner *owner;
aac00a8d 753 struct nfs4_state *state;
e56e0b78 754 struct iattr attrs;
26e976a8 755 unsigned long timestamp;
3e309914 756 unsigned int rpc_done : 1;
24ac23ab
TM		 757 int rpc_status;
758 int cancelled;
e56e0b78
TM		 759};
760
2ced46c2
TM		 761
762static void nfs4_init_opendata_res(struct nfs4_opendata *p)
763{
764 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 765 p->o_res.seqid = p->o_arg.seqid;
766 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 767 p->o_res.server = p->o_arg.server;
5f657530 768 p->o_res.access_request = p->o_arg.access;
2ced46c2 769 nfs_fattr_init(&p->f_attr);
6926afd1 770 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 771}
772
82a2c1b7 773static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 774 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 775 const struct iattr *attrs,
776 gfp_t gfp_mask)
e56e0b78 777{
82a2c1b7 778 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 779 struct inode *dir = parent->d_inode;
780 struct nfs_server *server = NFS_SERVER(dir);
781 struct nfs4_opendata *p;
782
8535b2be 783 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 784 if (p == NULL)
785 goto err;
8535b2be 786 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 787 if (p->o_arg.seqid == NULL)
788 goto err_free;
82a2c1b7
AV		 789 nfs_sb_active(dentry->d_sb);
790 p->dentry = dget(dentry);
e56e0b78
TM		 791 p->dir = parent;
792 p->owner = sp;
793 atomic_inc(&sp->so_count);
794 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 795 p->o_arg.open_flags = flags;
796 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 797 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
798 * will return permission denied for all bits until close */
799 if (!(flags & O_EXCL)) {
800 /* ask server to check for all possible rights as results
801 * are cached */
802 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
803 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 804 }
7539bbab 805 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 806 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
807 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 808 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 809 p->o_arg.server = server;
810 p->o_arg.bitmask = server->attr_bitmask;
1549210f 811 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
e56e0b78 812 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
536e43d1 813 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 814 __be32 verf[2];
d77d76ff 815
e56e0b78
TM		 816 p->o_arg.u.attrs = &p->attrs;
817 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 818
819 verf[0] = jiffies;
820 verf[1] = current->pid;
821 memcpy(p->o_arg.u.verifier.data, verf,
822 sizeof(p->o_arg.u.verifier.data));
e56e0b78 823 }
cdd4e68b
TM		 824 p->c_arg.fh = &p->o_res.fh;
825 p->c_arg.stateid = &p->o_res.stateid;
826 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 827 nfs4_init_opendata_res(p);
c6d00e63 828 kref_init(&p->kref);
e56e0b78
TM		 829 return p;
830err_free:
831 kfree(p);
832err:
833 dput(parent);
834 return NULL;
835}
836
c6d00e63 837static void nfs4_opendata_free(struct kref *kref)
e56e0b78 838{
c6d00e63
TM		 839 struct nfs4_opendata *p = container_of(kref,
840 struct nfs4_opendata, kref);
82a2c1b7 841 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 842
843 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 844 if (p->state != NULL)
845 nfs4_put_open_state(p->state);
c6d00e63
TM		 846 nfs4_put_state_owner(p->owner);
847 dput(p->dir);
82a2c1b7
AV		 848 dput(p->dentry);
849 nfs_sb_deactive(sb);
6926afd1 850 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 851 kfree(p);
852}
853
854static void nfs4_opendata_put(struct nfs4_opendata *p)
855{
856 if (p != NULL)
857 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 858}
859
06f814a3
TM		 860static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
861{
06f814a3
TM		 862 int ret;
863
06f814a3 864 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 865 return ret;
866}
867
dc0b027d 868static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 869{
870 int ret = 0;
dc0b027d 871
536e43d1 872 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 873 goto out;
874 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 875 case FMODE_READ:
88069f77
TM		 876 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
877 && state->n_rdonly != 0;
6ee41268
TM		 878 break;
879 case FMODE_WRITE:
88069f77
TM		 880 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
881 && state->n_wronly != 0;
6ee41268
TM		 882 break;
883 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 884 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
885 && state->n_rdwr != 0;
6ee41268 886 }
dc0b027d 887out:
6ee41268
TM		 888 return ret;
889}
890
dc0b027d 891static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 892{
652f89f6
TM		 893 if (delegation == NULL)
894 return 0;
dc0b027d 895 if ((delegation->type & fmode) != fmode)
aac00a8d 896 return 0;
15c831bf 897 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 898 return 0;
d25be546
TM		 899 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
900 return 0;
b7391f44 901 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 902 return 1;
903}
904
dc0b027d 905static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 906{
dc0b027d 907 switch (fmode) {
e7616923
TM		 908 case FMODE_WRITE:
909 state->n_wronly++;
910 break;
911 case FMODE_READ:
912 state->n_rdonly++;
913 break;
914 case FMODE_READ|FMODE_WRITE:
915 state->n_rdwr++;
916 }
dc0b027d 917 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 918}
919
dc0b027d 920static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 921{
922 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 923 nfs4_stateid_copy(&state->stateid, stateid);
924 nfs4_stateid_copy(&state->open_stateid, stateid);
dc0b027d 925 switch (fmode) {
003707c7
TM		 926 case FMODE_READ:
927 set_bit(NFS_O_RDONLY_STATE, &state->flags);
928 break;
929 case FMODE_WRITE:
930 set_bit(NFS_O_WRONLY_STATE, &state->flags);
931 break;
932 case FMODE_READ|FMODE_WRITE:
933 set_bit(NFS_O_RDWR_STATE, &state->flags);
934 }
e7616923
TM		 935}
936
dc0b027d 937static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 938{
8bda4e4c 939 write_seqlock(&state->seqlock);
dc0b027d 940 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 941 write_sequnlock(&state->seqlock);
003707c7
TM		 942}
943
dc0b027d 944static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 945{
8bda4e4c
TM		 946 /*
947 * Protect the call to nfs4_state_set_mode_locked and
948 * serialise the stateid update
949 */
950 write_seqlock(&state->seqlock);
003707c7 951 if (deleg_stateid != NULL) {
f597c537 952 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 953 set_bit(NFS_DELEGATED_STATE, &state->flags);
954 }
955 if (open_stateid != NULL)
dc0b027d 956 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 957 write_sequnlock(&state->seqlock);
958 spin_lock(&state->owner->so_lock);
dc0b027d 959 update_open_stateflags(state, fmode);
ec073428 960 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 961}
962
dc0b027d 963static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 964{
965 struct nfs_inode *nfsi = NFS_I(state->inode);
966 struct nfs_delegation *deleg_cur;
967 int ret = 0;
968
dc0b027d 969 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 970
971 rcu_read_lock();
972 deleg_cur = rcu_dereference(nfsi->delegation);
973 if (deleg_cur == NULL)
974 goto no_delegation;
975
976 spin_lock(&deleg_cur->lock);
977 if (nfsi->delegation != deleg_cur ||
d25be546 978 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 979 (deleg_cur->type & fmode) != fmode)
34310430
TM		 980 goto no_delegation_unlock;
981
982 if (delegation == NULL)
983 delegation = &deleg_cur->stateid;
f597c537 984 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 985 goto no_delegation_unlock;
986
b7391f44 987 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 988 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 989 ret = 1;
990no_delegation_unlock:
991 spin_unlock(&deleg_cur->lock);
992no_delegation:
993 rcu_read_unlock();
994
995 if (!ret && open_stateid != NULL) {
dc0b027d 996 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 997 ret = 1;
998 }
999
1000 return ret;
1001}
1002
1003
dc0b027d 1004static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1005{
1006 struct nfs_delegation *delegation;
1007
1008 rcu_read_lock();
1009 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1010 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1011 rcu_read_unlock();
1012 return;
1013 }
1014 rcu_read_unlock();
57ec14c5 1015 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1016}
1017
6ee41268 1018static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1019{
1020 struct nfs4_state *state = opendata->state;
1021 struct nfs_inode *nfsi = NFS_I(state->inode);
1022 struct nfs_delegation *delegation;
536e43d1 1023 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1024 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1025 nfs4_stateid stateid;
1026 int ret = -EAGAIN;
1027
aac00a8d 1028 for (;;) {
dc0b027d 1029 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1030 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1031 if (can_open_cached(state, fmode, open_mode)) {
1032 update_open_stateflags(state, fmode);
6ee41268 1033 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1034 goto out_return_state;
1035 }
1036 spin_unlock(&state->owner->so_lock);
1037 }
34310430
TM		 1038 rcu_read_lock();
1039 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1040 if (!can_open_delegated(delegation, fmode)) {
34310430 1041 rcu_read_unlock();
aac00a8d 1042 break;
34310430 1043 }
aac00a8d 1044 /* Save the delegation */
f597c537 1045 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1046 rcu_read_unlock();
af22f94a 1047 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1048 if (ret != 0)
1049 goto out;
1050 ret = -EAGAIN;
34310430
TM		 1051
1052 /* Try to update the stateid using the delegation */
dc0b027d 1053 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1054 goto out_return_state;
aac00a8d 1055 }
aac00a8d
TM		 1056out:
1057 return ERR_PTR(ret);
1058out_return_state:
1059 atomic_inc(&state->count);
1060 return state;
1061}
1062
e23008ec
AA		 1063static void
1064nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1065{
1066 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1067 struct nfs_delegation *delegation;
1068 int delegation_flags = 0;
1069
1070 rcu_read_lock();
1071 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1072 if (delegation)
1073 delegation_flags = delegation->flags;
1074 rcu_read_unlock();
1075 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1076 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1077 "returning a delegation for "
1078 "OPEN(CLAIM_DELEGATE_CUR)\n",
1079 clp->cl_hostname);
1080 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1081 nfs_inode_set_delegation(state->inode,
1082 data->owner->so_cred,
1083 &data->o_res);
1084 else
1085 nfs_inode_reclaim_delegation(state->inode,
1086 data->owner->so_cred,
1087 &data->o_res);
1088}
1089
1090/*
1091 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1092 * and update the nfs4_state.
1093 */
1094static struct nfs4_state *
1095_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1096{
1097 struct inode *inode = data->state->inode;
1098 struct nfs4_state *state = data->state;
1099 int ret;
1100
1101 if (!data->rpc_done) {
1102 ret = data->rpc_status;
1103 goto err;
1104 }
1105
1106 ret = -ESTALE;
1107 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1108 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1109 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1110 goto err;
1111
1112 ret = -ENOMEM;
1113 state = nfs4_get_open_state(inode, data->owner);
1114 if (state == NULL)
1115 goto err;
1116
1117 ret = nfs_refresh_inode(inode, &data->f_attr);
1118 if (ret)
1119 goto err;
1120
1121 if (data->o_res.delegation_type != 0)
1122 nfs4_opendata_check_deleg(data, state);
1123 update_open_stateid(state, &data->o_res.stateid, NULL,
1124 data->o_arg.fmode);
1125
1126 return state;
1127err:
1128 return ERR_PTR(ret);
1129
1130}
1131
1132static struct nfs4_state *
1133_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1134{
1135 struct inode *inode;
1136 struct nfs4_state *state = NULL;
1b370bc2 1137 int ret;
24ac23ab 1138
aac00a8d 1139 if (!data->rpc_done) {
6ee41268 1140 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1141 goto out;
1142 }
1143
1b370bc2 1144 ret = -EAGAIN;
24ac23ab 1145 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1146 goto err;
24ac23ab 1147 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1148 ret = PTR_ERR(inode);
03f28e3a 1149 if (IS_ERR(inode))
1b370bc2
TM		 1150 goto err;
1151 ret = -ENOMEM;
24ac23ab
TM		 1152 state = nfs4_get_open_state(inode, data->owner);
1153 if (state == NULL)
1b370bc2 1154 goto err_put_inode;
e23008ec
AA		 1155 if (data->o_res.delegation_type != 0)
1156 nfs4_opendata_check_deleg(data, state);
34310430 1157 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1158 data->o_arg.fmode);
24ac23ab 1159 iput(inode);
aac00a8d 1160out:
24ac23ab 1161 return state;
1b370bc2
TM		 1162err_put_inode:
1163 iput(inode);
1164err:
1165 return ERR_PTR(ret);
24ac23ab
TM		 1166}
1167
e23008ec
AA		 1168static struct nfs4_state *
1169nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1170{
1171 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1172 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1173 return _nfs4_opendata_to_nfs4_state(data);
1174}
1175
864472e9
TM		 1176static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1177{
1178 struct nfs_inode *nfsi = NFS_I(state->inode);
1179 struct nfs_open_context *ctx;
1180
1181 spin_lock(&state->inode->i_lock);
1182 list_for_each_entry(ctx, &nfsi->open_files, list) {
1183 if (ctx->state != state)
1184 continue;
1185 get_nfs_open_context(ctx);
1186 spin_unlock(&state->inode->i_lock);
1187 return ctx;
1188 }
1189 spin_unlock(&state->inode->i_lock);
1190 return ERR_PTR(-ENOENT);
1191}
1192
6f220ed5
TM		 1193static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1194{
1195 struct nfs4_opendata *opendata;
1196
3d4ff43d 1197 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1198 if (opendata == NULL)
1199 return ERR_PTR(-ENOMEM);
1200 opendata->state = state;
1201 atomic_inc(&state->count);
1202 return opendata;
1203}
1204
dc0b027d 1205static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1206{
2ced46c2 1207 struct nfs4_state *newstate;
864472e9
TM		 1208 int ret;
1209
dc0b027d
TM		 1210 opendata->o_arg.open_flags = 0;
1211 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1212 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1213 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1214 nfs4_init_opendata_res(opendata);
b257957e 1215 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1216 if (ret != 0)
1217 return ret;
2ced46c2 1218 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1219 if (IS_ERR(newstate))
1220 return PTR_ERR(newstate);
643168c2 1221 nfs4_close_state(newstate, fmode);
2ced46c2 1222 *res = newstate;
864472e9
TM		 1223 return 0;
1224}
1225
1226static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1227{
864472e9 1228 struct nfs4_state *newstate;
864472e9
TM		 1229 int ret;
1230
1231 /* memory barrier prior to reading state->n_* */
2ced46c2 1232 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1233 smp_rmb();
1234 if (state->n_rdwr != 0) {
b0ed9dbc 1235 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1236 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1237 if (ret != 0)
1238 return ret;
2ced46c2
TM		 1239 if (newstate != state)
1240 return -ESTALE;
864472e9
TM		 1241 }
1242 if (state->n_wronly != 0) {
b0ed9dbc 1243 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1244 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1245 if (ret != 0)
1246 return ret;
2ced46c2
TM		 1247 if (newstate != state)
1248 return -ESTALE;
864472e9
TM		 1249 }
1250 if (state->n_rdonly != 0) {
b0ed9dbc 1251 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1252 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1253 if (ret != 0)
1254 return ret;
2ced46c2
TM		 1255 if (newstate != state)
1256 return -ESTALE;
864472e9 1257 }
1ac7e2fd
TM		 1258 /*
1259 * We may have performed cached opens for all three recoveries.
1260 * Check if we need to update the current stateid.
1261 */
1262 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1263 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1264 write_seqlock(&state->seqlock);
1ac7e2fd 1265 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1266 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1267 write_sequnlock(&state->seqlock);
1ac7e2fd 1268 }
864472e9
TM		 1269 return 0;
1270}
1271
1da177e4
LT		 1272/*
1273 * OPEN_RECLAIM:
1274 * reclaim state on the server after a reboot.
1da177e4 1275 */
539cd03a 1276static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1277{
1ac7e2fd 1278 struct nfs_delegation *delegation;
864472e9 1279 struct nfs4_opendata *opendata;
dc0b027d 1280 fmode_t delegation_type = 0;
1da177e4
LT		 1281 int status;
1282
6f220ed5
TM		 1283 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1284 if (IS_ERR(opendata))
1285 return PTR_ERR(opendata);
864472e9
TM		 1286 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1287 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1288 rcu_read_lock();
1289 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1290 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1291 delegation_type = delegation->type;
1ac7e2fd 1292 rcu_read_unlock();
864472e9
TM		 1293 opendata->o_arg.u.delegation_type = delegation_type;
1294 status = nfs4_open_recover(opendata, state);
c6d00e63 1295 nfs4_opendata_put(opendata);
1da177e4
LT		 1296 return status;
1297}
1298
539cd03a 1299static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1300{
1301 struct nfs_server *server = NFS_SERVER(state->inode);
1302 struct nfs4_exception exception = { };
1303 int err;
1304 do {
539cd03a 1305 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1306 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1307 break;
1308 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1309 } while (exception.retry);
1310 return err;
1311}
1312
864472e9
TM		 1313static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1314{
1315 struct nfs_open_context *ctx;
1316 int ret;
1317
1318 ctx = nfs4_state_find_open_context(state);
1319 if (IS_ERR(ctx))
1320 return PTR_ERR(ctx);
539cd03a 1321 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1322 put_nfs_open_context(ctx);
1323 return ret;
1324}
1325
13437e12 1326static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1327{
e56e0b78 1328 struct nfs4_opendata *opendata;
864472e9 1329 int ret;
1da177e4 1330
6f220ed5
TM		 1331 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1332 if (IS_ERR(opendata))
1333 return PTR_ERR(opendata);
e56e0b78 1334 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
f597c537 1335 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
864472e9 1336 ret = nfs4_open_recover(opendata, state);
c6d00e63 1337 nfs4_opendata_put(opendata);
864472e9 1338 return ret;
1da177e4
LT		 1339}
1340
13437e12 1341int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1342{
1343 struct nfs4_exception exception = { };
539cd03a 1344 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1345 int err;
1346 do {
13437e12 1347 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1348 switch (err) {
1349 case 0:
965b5d67
TM		 1350 case -ENOENT:
1351 case -ESTALE:
1352 goto out;
bcfa49f6
RL		 1353 case -NFS4ERR_BADSESSION:
1354 case -NFS4ERR_BADSLOT:
1355 case -NFS4ERR_BAD_HIGH_SLOT:
1356 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1357 case -NFS4ERR_DEADSESSION:
37380e42 1358 set_bit(NFS_DELEGATED_STATE, &state->flags);
9f594791 1359 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
37380e42 1360 err = -EAGAIN;
bcfa49f6 1361 goto out;
1da177e4
LT		 1362 case -NFS4ERR_STALE_CLIENTID:
1363 case -NFS4ERR_STALE_STATEID:
37380e42 1364 set_bit(NFS_DELEGATED_STATE, &state->flags);
1da177e4
LT		 1365 case -NFS4ERR_EXPIRED:
1366 /* Don't recall a delegation if it was lost */
0400a6b0 1367 nfs4_schedule_lease_recovery(server->nfs_client);
37380e42 1368 err = -EAGAIN;
965b5d67 1369 goto out;
a1d0b5ee 1370 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 1371 case -NFS4ERR_ADMIN_REVOKED:
1372 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 1373 nfs_inode_find_state_and_recover(state->inode,
1374 stateid);
0400a6b0 1375 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 1376 case -ENOMEM:
1377 err = 0;
1378 goto out;
1da177e4 1379 }
37380e42 1380 set_bit(NFS_DELEGATED_STATE, &state->flags);
1da177e4
LT		 1381 err = nfs4_handle_exception(server, err, &exception);
1382 } while (exception.retry);
965b5d67 1383out:
1da177e4
LT		 1384 return err;
1385}
1386
cdd4e68b
TM		 1387static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1388{
1389 struct nfs4_opendata *data = calldata;
1390
1391 data->rpc_status = task->tk_status;
26e976a8 1392 if (data->rpc_status == 0) {
f597c537 1393 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1394 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1395 renew_lease(data->o_res.server, data->timestamp);
3e309914 1396 data->rpc_done = 1;
26e976a8 1397 }
cdd4e68b
TM		 1398}
1399
1400static void nfs4_open_confirm_release(void *calldata)
1401{
1402 struct nfs4_opendata *data = calldata;
1403 struct nfs4_state *state = NULL;
1404
1405 /* If this request hasn't been cancelled, do nothing */
1406 if (data->cancelled == 0)
1407 goto out_free;
1408 /* In case of error, no cleanup! */
3e309914 1409 if (!data->rpc_done)
cdd4e68b 1410 goto out_free;
cdd4e68b 1411 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1412 if (!IS_ERR(state))
643168c2 1413 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1414out_free:
c6d00e63 1415 nfs4_opendata_put(data);
cdd4e68b
TM		 1416}
1417
1418static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1419 .rpc_call_done = nfs4_open_confirm_done,
1420 .rpc_release = nfs4_open_confirm_release,
1421};
1422
1423/*
1424 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1425 */
1426static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1427{
1428 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1429 struct rpc_task *task;
5138fde0
TM		 1430 struct rpc_message msg = {
1431 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1432 .rpc_argp = &data->c_arg,
1433 .rpc_resp = &data->c_res,
1434 .rpc_cred = data->owner->so_cred,
1435 };
c970aa85
TM		 1436 struct rpc_task_setup task_setup_data = {
1437 .rpc_client = server->client,
5138fde0 1438 .rpc_message = &msg,
c970aa85
TM		 1439 .callback_ops = &nfs4_open_confirm_ops,
1440 .callback_data = data,
101070ca 1441 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1442 .flags = RPC_TASK_ASYNC,
1443 };
1da177e4
LT		 1444 int status;
1445
c6d00e63 1446 kref_get(&data->kref);
3e309914
TM		 1447 data->rpc_done = 0;
1448 data->rpc_status = 0;
5138fde0 1449 data->timestamp = jiffies;
c970aa85 1450 task = rpc_run_task(&task_setup_data);
7a1218a2 1451 if (IS_ERR(task))
cdd4e68b 1452 return PTR_ERR(task);
cdd4e68b
TM		 1453 status = nfs4_wait_for_completion_rpc_task(task);
1454 if (status != 0) {
1455 data->cancelled = 1;
1456 smp_wmb();
1457 } else
1458 status = data->rpc_status;
e6b3c4db 1459 rpc_put_task(task);
1da177e4
LT		 1460 return status;
1461}
1462
24ac23ab 1463static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1464{
24ac23ab
TM		 1465 struct nfs4_opendata *data = calldata;
1466 struct nfs4_state_owner *sp = data->owner;
5138fde0 1467
24ac23ab 1468 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1469 goto out_wait;
aac00a8d
TM		 1470 /*
1471 * Check if we still need to send an OPEN call, or if we can use
1472 * a delegation instead.
1473 */
1474 if (data->state != NULL) {
1475 struct nfs_delegation *delegation;
1476
dc0b027d 1477 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1478 goto out_no_action;
aac00a8d
TM		 1479 rcu_read_lock();
1480 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1481 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1482 can_open_delegated(delegation, data->o_arg.fmode))
1483 goto unlock_no_action;
aac00a8d
TM		 1484 rcu_read_unlock();
1485 }
95b72eb0 1486 /* Update client id. */
1f0e890d 1487 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1488 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1489 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
e23008ec 1490 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
6f220ed5
TM		 1491 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1492 }
26e976a8 1493 data->timestamp = jiffies;
035168ab 1494 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1495 &data->o_arg.seq_args,
2240a9e2
TM		 1496 &data->o_res.seq_res,
1497 task) != 0)
1498 nfs_release_seqid(data->o_arg.seqid);
6ee41268 1499 return;
652f89f6
TM		 1500unlock_no_action:
1501 rcu_read_unlock();
6ee41268
TM		 1502out_no_action:
1503 task->tk_action = NULL;
c8da19b9 1504out_wait:
b75ad4cd 1505 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1506}
1507
24ac23ab
TM		 1508static void nfs4_open_done(struct rpc_task *task, void *calldata)
1509{
1510 struct nfs4_opendata *data = calldata;
1da177e4 1511
24ac23ab 1512 data->rpc_status = task->tk_status;
d898528c 1513
14516c3a
TM		 1514 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1515 return;
d898528c 1516
24ac23ab 1517 if (task->tk_status == 0) {
807d66d8
TM		 1518 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1519 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1520 case S_IFREG:
1521 break;
1522 case S_IFLNK:
24ac23ab 1523 data->rpc_status = -ELOOP;
6f926b5b
TM		 1524 break;
1525 case S_IFDIR:
24ac23ab 1526 data->rpc_status = -EISDIR;
6f926b5b
TM		 1527 break;
1528 default:
24ac23ab 1529 data->rpc_status = -ENOTDIR;
807d66d8 1530 }
6f926b5b 1531 }
26e976a8 1532 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1533 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1534 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1535 }
3e309914 1536 data->rpc_done = 1;
24ac23ab 1537}
6f926b5b 1538
24ac23ab
TM		 1539static void nfs4_open_release(void *calldata)
1540{
1541 struct nfs4_opendata *data = calldata;
1542 struct nfs4_state *state = NULL;
1543
1544 /* If this request hasn't been cancelled, do nothing */
1545 if (data->cancelled == 0)
1546 goto out_free;
1547 /* In case of error, no cleanup! */
3e309914 1548 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1549 goto out_free;
1550 /* In case we need an open_confirm, no cleanup! */
1551 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1552 goto out_free;
24ac23ab 1553 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1554 if (!IS_ERR(state))
643168c2 1555 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1556out_free:
c6d00e63 1557 nfs4_opendata_put(data);
24ac23ab
TM		 1558}
1559
1560static const struct rpc_call_ops nfs4_open_ops = {
1561 .rpc_call_prepare = nfs4_open_prepare,
1562 .rpc_call_done = nfs4_open_done,
1563 .rpc_release = nfs4_open_release,
1564};
1565
b257957e 1566static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1567{
1568 struct inode *dir = data->dir->d_inode;
1569 struct nfs_server *server = NFS_SERVER(dir);
1570 struct nfs_openargs *o_arg = &data->o_arg;
1571 struct nfs_openres *o_res = &data->o_res;
1572 struct rpc_task *task;
5138fde0
TM		 1573 struct rpc_message msg = {
1574 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1575 .rpc_argp = o_arg,
1576 .rpc_resp = o_res,
1577 .rpc_cred = data->owner->so_cred,
1578 };
c970aa85
TM		 1579 struct rpc_task_setup task_setup_data = {
1580 .rpc_client = server->client,
5138fde0 1581 .rpc_message = &msg,
c970aa85
TM		 1582 .callback_ops = &nfs4_open_ops,
1583 .callback_data = data,
101070ca 1584 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1585 .flags = RPC_TASK_ASYNC,
1586 };
24ac23ab
TM		 1587 int status;
1588
9d12b216 1589 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1590 kref_get(&data->kref);
3e309914
TM		 1591 data->rpc_done = 0;
1592 data->rpc_status = 0;
2ced46c2 1593 data->cancelled = 0;
b257957e 1594 if (isrecover)
8fe72bac 1595 nfs4_set_sequence_privileged(&o_arg->seq_args);
c970aa85 1596 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1597 if (IS_ERR(task))
1598 return PTR_ERR(task);
1599 status = nfs4_wait_for_completion_rpc_task(task);
1600 if (status != 0) {
1601 data->cancelled = 1;
1602 smp_wmb();
1603 } else
1604 status = data->rpc_status;
1605 rpc_put_task(task);
1606
1607 return status;
1608}
1609
1610static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1611{
1612 struct inode *dir = data->dir->d_inode;
1613 struct nfs_openres *o_res = &data->o_res;
1614 int status;
1615
1616 status = nfs4_run_open_task(data, 1);
1617 if (status != 0 || !data->rpc_done)
1618 return status;
1619
6926afd1
TM		 1620 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1621
b257957e
AB		 1622 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1623 status = _nfs4_proc_open_confirm(data);
1624 if (status != 0)
1625 return status;
1626 }
1627
1628 return status;
1629}
1630
6168f62c
WAA		 1631static int nfs4_opendata_access(struct rpc_cred *cred,
1632 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1633 struct nfs4_state *state, fmode_t fmode,
1634 int openflags)
6168f62c
WAA		 1635{
1636 struct nfs_access_entry cache;
1637 u32 mask;
1638
1639 /* access call failed or for some reason the server doesn't
1640 * support any access modes -- defer access call until later */
1641 if (opendata->o_res.access_supported == 0)
1642 return 0;
1643
1644 mask = 0;
bbd3a8ee 1645 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1646 * write mode bits, but POSIX allows the creating process to write.
1647 * use openflags to check for exec, because fmode won't
1648 * always have FMODE_EXEC set when file open for exec. */
1649 if (openflags & __FMODE_EXEC) {
1650 /* ONLY check for exec rights */
1651 mask = MAY_EXEC;
1652 } else if (fmode & FMODE_READ)
1653 mask = MAY_READ;
6168f62c
WAA		 1654
1655 cache.cred = cred;
1656 cache.jiffies = jiffies;
1657 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1658 nfs_access_add_cache(state->inode, &cache);
1659
bbd3a8ee 1660 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1661 return 0;
1662
1663 /* even though OPEN succeeded, access is denied. Close the file */
1664 nfs4_close_state(state, fmode);
998f40b5 1665 return -EACCES;
6168f62c
WAA		 1666}
1667
b257957e
AB		 1668/*
1669 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1670 */
1671static int _nfs4_proc_open(struct nfs4_opendata *data)
1672{
1673 struct inode *dir = data->dir->d_inode;
1674 struct nfs_server *server = NFS_SERVER(dir);
1675 struct nfs_openargs *o_arg = &data->o_arg;
1676 struct nfs_openres *o_res = &data->o_res;
1677 int status;
1678
1679 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1680 if (!data->rpc_done)
1681 return status;
1682 if (status != 0) {
1683 if (status == -NFS4ERR_BADNAME &&
1684 !(o_arg->open_flags & O_CREAT))
1685 return -ENOENT;
24ac23ab 1686 return status;
08ef7bd3 1687 }
24ac23ab 1688
6926afd1
TM		 1689 nfs_fattr_map_and_free_names(server, &data->f_attr);
1690
90ff0c54 1691 if (o_arg->open_flags & O_CREAT)
56ae19f3 1692 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1693 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1694 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1695 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1696 status = _nfs4_proc_open_confirm(data);
1da177e4 1697 if (status != 0)
24ac23ab 1698 return status;
1da177e4
LT		 1699 }
1700 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1701 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1702 return 0;
1da177e4
LT		 1703}
1704
d83217c1
AA		 1705static int nfs4_recover_expired_lease(struct nfs_server *server)
1706{
1707 return nfs4_client_recover_expired_lease(server->nfs_client);
1708}
1709
1da177e4
LT		 1710/*
1711 * OPEN_EXPIRED:
1712 * reclaim state on the server after a network partition.
1713 * Assumes caller holds the appropriate lock
1714 */
539cd03a 1715static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1716{
e56e0b78 1717 struct nfs4_opendata *opendata;
864472e9 1718 int ret;
1da177e4 1719
6f220ed5
TM		 1720 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1721 if (IS_ERR(opendata))
1722 return PTR_ERR(opendata);
864472e9 1723 ret = nfs4_open_recover(opendata, state);
35d05778 1724 if (ret == -ESTALE)
3d4ff43d 1725 d_drop(ctx->dentry);
c6d00e63 1726 nfs4_opendata_put(opendata);
864472e9 1727 return ret;
1da177e4
LT		 1728}
1729
a9ed2e25 1730static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1731{
539cd03a 1732 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1733 struct nfs4_exception exception = { };
1734 int err;
1735
1736 do {
539cd03a 1737 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1738 switch (err) {
1739 default:
1740 goto out;
1741 case -NFS4ERR_GRACE:
1742 case -NFS4ERR_DELAY:
1743 nfs4_handle_exception(server, err, &exception);
1744 err = 0;
1745 }
202b50dc 1746 } while (exception.retry);
a9ed2e25 1747out:
202b50dc
TM		 1748 return err;
1749}
1750
1da177e4
LT		 1751static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1752{
1da177e4 1753 struct nfs_open_context *ctx;
864472e9 1754 int ret;
1da177e4 1755
864472e9
TM		 1756 ctx = nfs4_state_find_open_context(state);
1757 if (IS_ERR(ctx))
1758 return PTR_ERR(ctx);
539cd03a 1759 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1760 put_nfs_open_context(ctx);
1761 return ret;
1da177e4
LT		 1762}
1763
f062eb6c 1764#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1765static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1766{
f062eb6c 1767 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1768 nfs4_stateid *stateid = &state->stateid;
1769 int status;
1770
1771 /* If a state reset has been done, test_stateid is unneeded */
1772 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1773 return;
1774
1775 status = nfs41_test_stateid(server, stateid);
1776 if (status != NFS_OK) {
1777 /* Free the stateid unless the server explicitly
1778 * informs us the stateid is unrecognized. */
1779 if (status != -NFS4ERR_BAD_STATEID)
1780 nfs41_free_stateid(server, stateid);
6938867e 1781 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1782
6938867e
BS		 1783 write_seqlock(&state->seqlock);
1784 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1785 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1786 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1787 }
1788}
1789
1790/**
1791 * nfs41_check_open_stateid - possibly free an open stateid
1792 *
1793 * @state: NFSv4 state for an inode
1794 *
1795 * Returns NFS_OK if recovery for this stateid is now finished.
1796 * Otherwise a negative NFS4ERR value is returned.
1797 */
1798static int nfs41_check_open_stateid(struct nfs4_state *state)
1799{
1800 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1801 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1802 int status;
1803
1804 /* If a state reset has been done, test_stateid is unneeded */
1805 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1806 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1807 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1808 return -NFS4ERR_BAD_STATEID;
1809
1810 status = nfs41_test_stateid(server, stateid);
1811 if (status != NFS_OK) {
1812 /* Free the stateid unless the server explicitly
1813 * informs us the stateid is unrecognized. */
1814 if (status != -NFS4ERR_BAD_STATEID)
1815 nfs41_free_stateid(server, stateid);
1816
1817 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1818 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1819 clear_bit(NFS_O_RDWR_STATE, &state->flags);
b01dd1d8
BS		 1820 }
1821 return status;
1822}
1823
1824static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1825{
eb64cf96 1826 int status;
b01dd1d8 1827
3e60ffdd
CL		 1828 nfs41_clear_delegation_stateid(state);
1829 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1830 if (status != NFS_OK)
1831 status = nfs4_open_expired(sp, state);
1832 return status;
f062eb6c
BS		 1833}
1834#endif
1835
aa53ed54
JL		 1836/*
1837 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1838 * fields corresponding to attributes that were used to store the verifier.
1839 * Make sure we clobber those fields in the later setattr call
1840 */
1841static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1842{
1843 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1844 !(sattr->ia_valid & ATTR_ATIME_SET))
1845 sattr->ia_valid |= ATTR_ATIME;
1846
1847 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1848 !(sattr->ia_valid & ATTR_MTIME_SET))
1849 sattr->ia_valid |= ATTR_MTIME;
1850}
1851
c21443c2
TM		 1852static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1853 fmode_t fmode,
1854 int flags,
1855 struct nfs4_state **res)
1856{
1857 struct nfs4_state_owner *sp = opendata->owner;
1858 struct nfs_server *server = sp->so_server;
1859 struct nfs4_state *state;
1860 unsigned int seq;
1861 int ret;
1862
1863 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1864
1865 ret = _nfs4_proc_open(opendata);
1866 if (ret != 0)
1867 goto out;
1868
1869 state = nfs4_opendata_to_nfs4_state(opendata);
1870 ret = PTR_ERR(state);
1871 if (IS_ERR(state))
1872 goto out;
1873 if (server->caps & NFS_CAP_POSIX_LOCK)
1874 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1875
1876 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1877 if (ret != 0)
1878 goto out;
1879
1880 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
1881 nfs4_schedule_stateid_recovery(server, state);
1882 nfs4_wait_clnt_recover(server->nfs_client);
1883 }
1884 *res = state;
1885out:
1886 return ret;
1887}
1888
1da177e4 1889/*
24ac23ab 1890 * Returns a referenced nfs4_state
1da177e4 1891 */
82be417a
AA		 1892static int _nfs4_do_open(struct inode *dir,
1893 struct dentry *dentry,
1894 fmode_t fmode,
1895 int flags,
1896 struct iattr *sattr,
1897 struct rpc_cred *cred,
1898 struct nfs4_state **res,
1899 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1900{
1901 struct nfs4_state_owner *sp;
1902 struct nfs4_state *state = NULL;
1903 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1904 struct nfs4_opendata *opendata;
aac00a8d 1905 int status;
1da177e4
LT		 1906
1907 /* Protect against reboot recovery conflicts */
1da177e4 1908 status = -ENOMEM;
d1e284d5
TM		 1909 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1910 if (sp == NULL) {
1da177e4
LT		 1911 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1912 goto out_err;
1913 }
58d9714a
TM		 1914 status = nfs4_recover_expired_lease(server);
1915 if (status != 0)
b4454fe1 1916 goto err_put_state_owner;
82a2c1b7
AV		 1917 if (dentry->d_inode != NULL)
1918 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1919 status = -ENOMEM;
82a2c1b7 1920 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1921 if (opendata == NULL)
95d35cb4 1922 goto err_put_state_owner;
1da177e4 1923
82be417a
AA		 1924 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1925 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1926 if (!opendata->f_attr.mdsthreshold)
1927 goto err_opendata_put;
1549210f 1928 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 1929 }
82a2c1b7
AV		 1930 if (dentry->d_inode != NULL)
1931 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1932
c21443c2 1933 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
6168f62c
WAA		 1934 if (status != 0)
1935 goto err_opendata_put;
1936
0ab64e0e
TM		 1937 if (opendata->o_arg.open_flags & O_EXCL) {
1938 nfs4_exclusive_attrset(opendata, sattr);
1939
1940 nfs_fattr_init(opendata->o_res.f_attr);
1941 status = nfs4_do_setattr(state->inode, cred,
1942 opendata->o_res.f_attr, sattr,
1943 state);
1944 if (status == 0)
1945 nfs_setattr_update_inode(state->inode, sattr);
1946 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1947 }
82be417a
AA		 1948
1949 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1950 *ctx_th = opendata->f_attr.mdsthreshold;
1951 else
1952 kfree(opendata->f_attr.mdsthreshold);
1953 opendata->f_attr.mdsthreshold = NULL;
1954
c6d00e63 1955 nfs4_opendata_put(opendata);
1da177e4 1956 nfs4_put_state_owner(sp);
1da177e4
LT		 1957 *res = state;
1958 return 0;
c6d00e63 1959err_opendata_put:
82be417a 1960 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 1961 nfs4_opendata_put(opendata);
e56e0b78
TM		 1962err_put_state_owner:
1963 nfs4_put_state_owner(sp);
1da177e4 1964out_err:
1da177e4
LT		 1965 *res = NULL;
1966 return status;
1967}
1968
1969
82be417a
AA		 1970static struct nfs4_state *nfs4_do_open(struct inode *dir,
1971 struct dentry *dentry,
1972 fmode_t fmode,
1973 int flags,
1974 struct iattr *sattr,
1975 struct rpc_cred *cred,
1976 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1977{
1978 struct nfs4_exception exception = { };
1979 struct nfs4_state *res;
1980 int status;
1981
6168f62c 1982 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 1983 do {
82be417a
AA		 1984 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1985 &res, ctx_th);
1da177e4
LT		 1986 if (status == 0)
1987 break;
1988 /* NOTE: BAD_SEQID means the server and client disagree about the
1989 * book-keeping w.r.t. state-changing operations
1990 * (OPEN/CLOSE/LOCK/LOCKU...)
1991 * It is actually a sign of a bug on the client or on the server.
1992 *
1993 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1994 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1995 * have unhashed the old state_owner for us, and that we can
1996 * therefore safely retry using a new one. We should still warn
1997 * the user though...
1998 */
1999 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2000 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2001 " returned a bad sequence-id error!\n",
2002 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2003 exception.retry = 1;
2004 continue;
2005 }
550f5747
TM		 2006 /*
2007 * BAD_STATEID on OPEN means that the server cancelled our
2008 * state before it received the OPEN_CONFIRM.
2009 * Recover by retrying the request as per the discussion
2010 * on Page 181 of RFC3530.
2011 */
2012 if (status == -NFS4ERR_BAD_STATEID) {
2013 exception.retry = 1;
2014 continue;
2015 }
aac00a8d
TM		 2016 if (status == -EAGAIN) {
2017 /* We must have found a delegation */
2018 exception.retry = 1;
2019 continue;
2020 }
1da177e4
LT		 2021 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
2022 status, &exception));
2023 } while (exception.retry);
2024 return res;
2025}
2026
659bfcd6
TM		 2027static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2028 struct nfs_fattr *fattr, struct iattr *sattr,
2029 struct nfs4_state *state)
1da177e4 2030{
3e4f6290 2031 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2032 struct nfs_setattrargs arg = {
3e4f6290 2033 .fh = NFS_FH(inode),
1da177e4
LT		 2034 .iap = sattr,
2035 .server = server,
2036 .bitmask = server->attr_bitmask,
2037 };
2038 struct nfs_setattrres res = {
2039 .fattr = fattr,
2040 .server = server,
2041 };
2042 struct rpc_message msg = {
659bfcd6
TM		 2043 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2044 .rpc_argp = &arg,
2045 .rpc_resp = &res,
2046 .rpc_cred = cred,
1da177e4 2047 };
26e976a8 2048 unsigned long timestamp = jiffies;
65e4308d 2049 int status;
1da177e4 2050
0e574af1 2051 nfs_fattr_init(fattr);
1da177e4 2052
4fc8796d 2053 if (state != NULL) {
2a369153
TM		 2054 struct nfs_lockowner lockowner = {
2055 .l_owner = current->files,
2056 .l_pid = current->tgid,
2057 };
4fc8796d 2058 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2059 &lockowner);
4fc8796d
TM		 2060 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2061 FMODE_WRITE)) {
3e4f6290 2062 /* Use that stateid */
08e9eac4 2063 } else
f597c537 2064 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2065
7c513058 2066 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2067 if (status == 0 && state != NULL)
2068 renew_lease(server, timestamp);
65e4308d 2069 return status;
1da177e4
LT		 2070}
2071
659bfcd6
TM		 2072static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2073 struct nfs_fattr *fattr, struct iattr *sattr,
2074 struct nfs4_state *state)
1da177e4 2075{
3e4f6290 2076 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2077 struct nfs4_exception exception = {
2078 .state = state,
3114ea7a 2079 .inode = inode,
a1d0b5ee 2080 };
1da177e4
LT		 2081 int err;
2082 do {
451146be
TM		 2083 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2084 switch (err) {
2085 case -NFS4ERR_OPENMODE:
2086 if (state && !(state->state & FMODE_WRITE)) {
2087 err = -EBADF;
2088 if (sattr->ia_valid & ATTR_OPEN)
2089 err = -EACCES;
2090 goto out;
2091 }
2092 }
2093 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2094 } while (exception.retry);
451146be 2095out:
1da177e4
LT		 2096 return err;
2097}
2098
2099struct nfs4_closedata {
2100 struct inode *inode;
2101 struct nfs4_state *state;
2102 struct nfs_closeargs arg;
2103 struct nfs_closeres res;
516a6af6 2104 struct nfs_fattr fattr;
26e976a8 2105 unsigned long timestamp;
f7e8917a
FI		 2106 bool roc;
2107 u32 roc_barrier;
1da177e4
LT		 2108};
2109
963d8fe5 2110static void nfs4_free_closedata(void *data)
9512135d 2111{
963d8fe5
TM		 2112 struct nfs4_closedata *calldata = data;
2113 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2114 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2115
f7e8917a
FI		 2116 if (calldata->roc)
2117 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2118 nfs4_put_open_state(calldata->state);
2119 nfs_free_seqid(calldata->arg.seqid);
9512135d 2120 nfs4_put_state_owner(sp);
322b2b90 2121 nfs_sb_deactive(sb);
9512135d
TM		 2122 kfree(calldata);
2123}
2124
88069f77
TM		 2125static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2126 fmode_t fmode)
2127{
2128 spin_lock(&state->owner->so_lock);
2129 if (!(fmode & FMODE_READ))
2130 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2131 if (!(fmode & FMODE_WRITE))
2132 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2133 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2134 spin_unlock(&state->owner->so_lock);
2135}
2136
963d8fe5 2137static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2138{
963d8fe5 2139 struct nfs4_closedata *calldata = data;
1da177e4 2140 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2141 struct nfs_server *server = NFS_SERVER(calldata->inode);
2142
a3ca5651 2143 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2144 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2145 return;
1da177e4
LT		 2146 /* hmm. we are done with the inode, and in the process of freeing
2147 * the state_owner. we keep this around to process errors
2148 */
1da177e4
LT		 2149 switch (task->tk_status) {
2150 case 0:
f7e8917a
FI		 2151 if (calldata->roc)
2152 pnfs_roc_set_barrier(state->inode,
2153 calldata->roc_barrier);
45328c35 2154 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2155 renew_lease(server, calldata->timestamp);
88069f77
TM		 2156 nfs4_close_clear_stateid_flags(state,
2157 calldata->arg.fmode);
1da177e4
LT		 2158 break;
2159 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2160 case -NFS4ERR_OLD_STATEID:
2161 case -NFS4ERR_BAD_STATEID:
1da177e4 2162 case -NFS4ERR_EXPIRED:
dc0b027d 2163 if (calldata->arg.fmode == 0)
9e33bed5 2164 break;
1da177e4 2165 default:
72211dbe
TM		 2166 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2167 rpc_restart_call_prepare(task);
1da177e4 2168 }
72211dbe 2169 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2170 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2171 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2172}
2173
4ce70ada 2174static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2175{
4ce70ada 2176 struct nfs4_closedata *calldata = data;
9512135d 2177 struct nfs4_state *state = calldata->state;
7fdab069 2178 struct inode *inode = calldata->inode;
88069f77 2179 int call_close = 0;
9512135d 2180
a3ca5651 2181 dprintk("%s: begin!\n", __func__);
963d8fe5 2182 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2183 goto out_wait;
003707c7 2184
88069f77
TM		 2185 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2186 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2187 spin_lock(&state->owner->so_lock);
003707c7 2188 /* Calculate the change in open mode */
e7616923 2189 if (state->n_rdwr == 0) {
003707c7 2190 if (state->n_rdonly == 0) {
88069f77
TM		 2191 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2192 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2193 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2194 }
2195 if (state->n_wronly == 0) {
88069f77
TM		 2196 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2197 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2198 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2199 }
e7616923 2200 }
4cecb76f 2201 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2202
2203 if (!call_close) {
963d8fe5 2204 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2205 goto out_no_action;
9512135d 2206 }
88069f77 2207
f7e8917a 2208 if (calldata->arg.fmode == 0) {
88069f77 2209 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2210 if (calldata->roc &&
7fdab069 2211 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
c8da19b9 2212 goto out_wait;
f7e8917a 2213 }
88069f77 2214
516a6af6 2215 nfs_fattr_init(calldata->res.fattr);
26e976a8 2216 calldata->timestamp = jiffies;
7fdab069 2217 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2218 &calldata->arg.seq_args,
2219 &calldata->res.seq_res,
2240a9e2
TM		 2220 task) != 0)
2221 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2222 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2223 return;
2224out_no_action:
2225 task->tk_action = NULL;
2226out_wait:
2227 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2228}
2229
963d8fe5 2230static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2231 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2232 .rpc_call_done = nfs4_close_done,
2233 .rpc_release = nfs4_free_closedata,
2234};
2235
1da177e4
LT		 2236/*
2237 * It is possible for data to be read/written from a mem-mapped file
2238 * after the sys_close call (which hits the vfs layer as a flush).
2239 * This means that we can't safely call nfsv4 close on a file until
2240 * the inode is cleared. This in turn means that we are not good
2241 * NFSv4 citizens - we do not indicate to the server to update the file's
2242 * share state even when we are done with one of the three share
2243 * stateid's in the inode.
2244 *
2245 * NOTE: Caller must be holding the sp->so_owner semaphore!
2246 */
1f7977c1 2247int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2248{
4a35bd41 2249 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2250 struct nfs4_closedata *calldata;
b39e625b
TM		 2251 struct nfs4_state_owner *sp = state->owner;
2252 struct rpc_task *task;
5138fde0
TM		 2253 struct rpc_message msg = {
2254 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2255 .rpc_cred = state->owner->so_cred,
2256 };
c970aa85
TM		 2257 struct rpc_task_setup task_setup_data = {
2258 .rpc_client = server->client,
5138fde0 2259 .rpc_message = &msg,
c970aa85 2260 .callback_ops = &nfs4_close_ops,
101070ca 2261 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2262 .flags = RPC_TASK_ASYNC,
2263 };
9512135d 2264 int status = -ENOMEM;
1da177e4 2265
8535b2be 2266 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2267 if (calldata == NULL)
9512135d 2268 goto out;
9d12b216 2269 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2270 calldata->inode = state->inode;
1da177e4 2271 calldata->state = state;
4a35bd41 2272 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2273 calldata->arg.stateid = &state->open_stateid;
1da177e4 2274 /* Serialization for the sequence id */
8535b2be 2275 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2276 if (calldata->arg.seqid == NULL)
2277 goto out_free_calldata;
dc0b027d 2278 calldata->arg.fmode = 0;
a65318bf 2279 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2280 calldata->res.fattr = &calldata->fattr;
c1d51931 2281 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2282 calldata->res.server = server;
1f7977c1 2283 calldata->roc = pnfs_roc(state->inode);
643168c2 2284 nfs_sb_active(calldata->inode->i_sb);
9512135d 2285
1174dd1f
TM		 2286 msg.rpc_argp = &calldata->arg;
2287 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2288 task_setup_data.callback_data = calldata;
2289 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2290 if (IS_ERR(task))
2291 return PTR_ERR(task);
a49c3c77
TM		 2292 status = 0;
2293 if (wait)
2294 status = rpc_wait_for_completion_task(task);
b39e625b 2295 rpc_put_task(task);
a49c3c77 2296 return status;
9512135d
TM		 2297out_free_calldata:
2298 kfree(calldata);
2299out:
b39e625b
TM		 2300 nfs4_put_open_state(state);
2301 nfs4_put_state_owner(sp);
9512135d 2302 return status;
1da177e4
LT		 2303}
2304
2b484297 2305static struct inode *
cd9a1c0e 2306nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2307{
1da177e4 2308 struct nfs4_state *state;
1da177e4 2309
565277f6 2310 /* Protect against concurrent sillydeletes */
82be417a
AA		 2311 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2312 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2313 if (IS_ERR(state))
2314 return ERR_CAST(state);
cd9a1c0e 2315 ctx->state = state;
f46e0bd3 2316 return igrab(state->inode);
1da177e4
LT		 2317}
2318
1185a552 2319static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2320{
2321 if (ctx->state == NULL)
2322 return;
2323 if (is_sync)
643168c2 2324 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2325 else
643168c2 2326 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2327}
1da177e4
LT		 2328
2329static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2330{
43652ad5
BH		 2331 struct nfs4_server_caps_arg args = {
2332 .fhandle = fhandle,
2333 };
1da177e4
LT		 2334 struct nfs4_server_caps_res res = {};
2335 struct rpc_message msg = {
2336 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2337 .rpc_argp = &args,
1da177e4
LT		 2338 .rpc_resp = &res,
2339 };
2340 int status;
2341
7c513058 2342 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2343 if (status == 0) {
2344 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2345 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2346 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2347 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2348 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2349 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2350 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2351 server->caps |= NFS_CAP_ACLS;
2352 if (res.has_links != 0)
2353 server->caps |= NFS_CAP_HARDLINKS;
2354 if (res.has_symlinks != 0)
2355 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2356 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2357 server->caps |= NFS_CAP_FILEID;
2358 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2359 server->caps |= NFS_CAP_MODE;
2360 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2361 server->caps |= NFS_CAP_NLINK;
2362 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2363 server->caps |= NFS_CAP_OWNER;
2364 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2365 server->caps |= NFS_CAP_OWNER_GROUP;
2366 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2367 server->caps |= NFS_CAP_ATIME;
2368 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2369 server->caps |= NFS_CAP_CTIME;
2370 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2371 server->caps |= NFS_CAP_MTIME;
2372
a65318bf
TM		 2373 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2374 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2375 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2376 server->acl_bitmask = res.acl_bitmask;
264e6351 2377 server->fh_expire_type = res.fh_expire_type;
1da177e4 2378 }
cccef3b9 2379
1da177e4
LT		 2380 return status;
2381}
2382
55a97593 2383int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2384{
2385 struct nfs4_exception exception = { };
2386 int err;
2387 do {
2388 err = nfs4_handle_exception(server,
2389 _nfs4_server_capabilities(server, fhandle),
2390 &exception);
2391 } while (exception.retry);
2392 return err;
2393}
2394
2395static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2396 struct nfs_fsinfo *info)
2397{
1da177e4
LT		 2398 struct nfs4_lookup_root_arg args = {
2399 .bitmask = nfs4_fattr_bitmap,
2400 };
2401 struct nfs4_lookup_res res = {
2402 .server = server,
0e574af1 2403 .fattr = info->fattr,
1da177e4
LT		 2404 .fh = fhandle,
2405 };
2406 struct rpc_message msg = {
2407 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2408 .rpc_argp = &args,
2409 .rpc_resp = &res,
2410 };
008f55d0 2411
0e574af1 2412 nfs_fattr_init(info->fattr);
7c513058 2413 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2414}
2415
2416static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2417 struct nfs_fsinfo *info)
2418{
2419 struct nfs4_exception exception = { };
2420 int err;
2421 do {
fb8a5ba8
BS		 2422 err = _nfs4_lookup_root(server, fhandle, info);
2423 switch (err) {
2424 case 0:
2425 case -NFS4ERR_WRONGSEC:
05e9cfb4 2426 goto out;
fb8a5ba8
BS		 2427 default:
2428 err = nfs4_handle_exception(server, err, &exception);
2429 }
1da177e4 2430 } while (exception.retry);
05e9cfb4 2431out:
1da177e4
LT		 2432 return err;
2433}
2434
8f70e95f
BS		 2435static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2436 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2437{
2438 struct rpc_auth *auth;
2439 int ret;
2440
2441 auth = rpcauth_create(flavor, server->client);
e8d920c5 2442 if (IS_ERR(auth)) {
8f70e95f
BS		 2443 ret = -EIO;
2444 goto out;
2445 }
2446 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2447out:
2448 return ret;
2449}
2450
801a16dc 2451static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2452 struct nfs_fsinfo *info)
1da177e4 2453{
8f70e95f 2454 int i, len, status = 0;
0fabee24 2455 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2456
6a1a1e34 2457 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
4ea8fed5
TM		 2458 if (len < 0)
2459 return len;
8f70e95f
BS		 2460
2461 for (i = 0; i < len; i++) {
6a1a1e34
CL		 2462 /* AUTH_UNIX is the default flavor if none was specified,
2463 * thus has already been tried. */
2464 if (flav_array[i] == RPC_AUTH_UNIX)
2465 continue;
2466
8f70e95f 2467 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2468 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2469 continue;
2470 break;
8f70e95f 2471 }
fb8a5ba8
BS		 2472 /*
2473 * -EACCESS could mean that the user doesn't have correct permissions
2474 * to access the mount. It could also mean that we tried to mount
2475 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2476 * existing mount programs don't handle -EACCES very well so it should
2477 * be mapped to -EPERM instead.
2478 */
2479 if (status == -EACCES)
2480 status = -EPERM;
801a16dc
BS		 2481 return status;
2482}
2483
2484/*
2485 * get the file handle for the "/" directory on the server
2486 */
3028eb2b
BS		 2487int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2488 struct nfs_fsinfo *info)
801a16dc 2489{
fca78d6d 2490 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2491 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2492 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2493 /*
2494 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2495 * by nfs4_map_errors() as this function exits.
2496 */
fca78d6d 2497 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2498 if (status == 0)
2499 status = nfs4_server_capabilities(server, fhandle);
2500 if (status == 0)
2501 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2502 return nfs4_map_errors(status);
1da177e4
LT		 2503}
2504
bae36241
BS		 2505static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2506 struct nfs_fsinfo *info)
2507{
2508 int error;
2509 struct nfs_fattr *fattr = info->fattr;
2510
2511 error = nfs4_server_capabilities(server, mntfh);
2512 if (error < 0) {
2513 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2514 return error;
2515 }
2516
2517 error = nfs4_proc_getattr(server, mntfh, fattr);
2518 if (error < 0) {
2519 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2520 return error;
2521 }
2522
2523 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2524 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2525 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2526
2527 return error;
2528}
2529
6b97fd3d
MN		 2530/*
2531 * Get locations and (maybe) other attributes of a referral.
2532 * Note that we'll actually follow the referral later when
2533 * we detect fsid mismatch in inode revalidation
2534 */
f05d147f
BS		 2535static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2536 const struct qstr *name, struct nfs_fattr *fattr,
2537 struct nfs_fh *fhandle)
6b97fd3d
MN		 2538{
2539 int status = -ENOMEM;
2540 struct page *page = NULL;
2541 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2542
2543 page = alloc_page(GFP_KERNEL);
2544 if (page == NULL)
2545 goto out;
2546 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2547 if (locations == NULL)
2548 goto out;
2549
f05d147f 2550 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2551 if (status != 0)
2552 goto out;
2553 /* Make sure server returned a different fsid for the referral */
2554 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2555 dprintk("%s: server did not return a different fsid for"
2556 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2557 status = -EIO;
2558 goto out;
2559 }
533eb461
AA		 2560 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2561 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2562
533eb461 2563 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2564 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2565 memset(fhandle, 0, sizeof(struct nfs_fh));
2566out:
2567 if (page)
2568 __free_page(page);
5d7ca35a 2569 kfree(locations);
6b97fd3d
MN		 2570 return status;
2571}
2572
1da177e4
LT		 2573static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2574{
2575 struct nfs4_getattr_arg args = {
2576 .fh = fhandle,
2577 .bitmask = server->attr_bitmask,
2578 };
2579 struct nfs4_getattr_res res = {
2580 .fattr = fattr,
2581 .server = server,
2582 };
2583 struct rpc_message msg = {
2584 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2585 .rpc_argp = &args,
2586 .rpc_resp = &res,
2587 };
2588
0e574af1 2589 nfs_fattr_init(fattr);
7c513058 2590 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2591}
2592
2593static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2594{
2595 struct nfs4_exception exception = { };
2596 int err;
2597 do {
2598 err = nfs4_handle_exception(server,
2599 _nfs4_proc_getattr(server, fhandle, fattr),
2600 &exception);
2601 } while (exception.retry);
2602 return err;
2603}
2604
2605/*
2606 * The file is not closed if it is opened due to the a request to change
2607 * the size of the file. The open call will not be needed once the
2608 * VFS layer lookup-intents are implemented.
2609 *
2610 * Close is called when the inode is destroyed.
2611 * If we haven't opened the file for O_WRONLY, we
2612 * need to in the size_change case to obtain a stateid.
2613 *
2614 * Got race?
2615 * Because OPEN is always done by name in nfsv4, it is
2616 * possible that we opened a different file by the same
2617 * name. We can recognize this race condition, but we
2618 * can't do anything about it besides returning an error.
2619 *
2620 * This will be fixed with VFS changes (lookup-intent).
2621 */
2622static int
2623nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2624 struct iattr *sattr)
2625{
08e9eac4 2626 struct inode *inode = dentry->d_inode;
659bfcd6 2627 struct rpc_cred *cred = NULL;
d530838b 2628 struct nfs4_state *state = NULL;
1da177e4
LT		 2629 int status;
2630
8a1636c4
BH		 2631 if (pnfs_ld_layoutret_on_setattr(inode))
2632 pnfs_return_layout(inode);
2633
0e574af1 2634 nfs_fattr_init(fattr);
1da177e4 2635
2669940d
AA		 2636 /* Deal with open(O_TRUNC) */
2637 if (sattr->ia_valid & ATTR_OPEN)
2638 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2639
2640 /* Optimization: if the end result is no change, don't RPC */
2641 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2642 return 0;
2643
d530838b 2644 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2645 if (sattr->ia_valid & ATTR_FILE) {
2646 struct nfs_open_context *ctx;
2647
2648 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2649 if (ctx) {
2650 cred = ctx->cred;
2651 state = ctx->state;
2652 }
659bfcd6 2653 }
08e9eac4 2654
659bfcd6 2655 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2656 if (status == 0)
2657 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2658 return status;
2659}
2660
0c2e53f1
TM		 2661static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2662 const struct qstr *name, struct nfs_fh *fhandle,
2663 struct nfs_fattr *fattr)
2b3de441 2664{
0c2e53f1 2665 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2666 int status;
2667 struct nfs4_lookup_arg args = {
2668 .bitmask = server->attr_bitmask,
0c2e53f1 2669 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2670 .name = name,
2671 };
2672 struct nfs4_lookup_res res = {
2673 .server = server,
2674 .fattr = fattr,
2675 .fh = fhandle,
2676 };
2677 struct rpc_message msg = {
2678 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2679 .rpc_argp = &args,
2680 .rpc_resp = &res,
2681 };
2682
2683 nfs_fattr_init(fattr);
2684
1da177e4 2685 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2686 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2687 dprintk("NFS reply lookup: %d\n", status);
2688 return status;
2689}
2690
72de53ec 2691static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2692{
7ebb9315 2693 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2694 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2695 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2696 fattr->nlink = 2;
2697}
2698
72de53ec
BS		 2699static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2700 struct qstr *name, struct nfs_fh *fhandle,
2701 struct nfs_fattr *fattr)
1da177e4
LT		 2702{
2703 struct nfs4_exception exception = { };
72de53ec 2704 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2705 int err;
2706 do {
72de53ec
BS		 2707 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2708 switch (err) {
08ef7bd3 2709 case -NFS4ERR_BADNAME:
72de53ec
BS		 2710 err = -ENOENT;
2711 goto out;
0c2e53f1 2712 case -NFS4ERR_MOVED:
f05d147f 2713 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2714 goto out;
0c2e53f1 2715 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2716 err = -EPERM;
2717 if (client != *clnt)
2718 goto out;
2719
2720 client = nfs4_create_sec_client(client, dir, name);
2721 if (IS_ERR(client))
2722 return PTR_ERR(client);
2723
2724 exception.retry = 1;
2725 break;
2726 default:
2727 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2728 }
1da177e4 2729 } while (exception.retry);
72de53ec
BS		 2730
2731out:
2732 if (err == 0)
2733 *clnt = client;
2734 else if (client != *clnt)
2735 rpc_shutdown_client(client);
2736
1da177e4
LT		 2737 return err;
2738}
2739
80a16b21 2740static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2741 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2742{
2743 int status;
2744 struct rpc_clnt *client = NFS_CLIENT(dir);
2745
2746 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2747 if (client != NFS_CLIENT(dir)) {
2748 rpc_shutdown_client(client);
2749 nfs_fixup_secinfo_attributes(fattr);
2750 }
2751 return status;
2752}
2753
f05d147f
BS		 2754struct rpc_clnt *
2755nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2756 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2757{
2758 int status;
2759 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2760
2761 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2762 if (status < 0) {
2763 rpc_shutdown_client(client);
2764 return ERR_PTR(status);
2765 }
2766 return client;
2767}
2768
1da177e4
LT		 2769static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2770{
76b32999 2771 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2772 struct nfs4_accessargs args = {
2773 .fh = NFS_FH(inode),
a4980e78 2774 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2775 };
2776 struct nfs4_accessres res = {
2777 .server = server,
1da177e4 2778 };
1da177e4
LT		 2779 struct rpc_message msg = {
2780 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2781 .rpc_argp = &args,
2782 .rpc_resp = &res,
2783 .rpc_cred = entry->cred,
2784 };
2785 int mode = entry->mask;
2786 int status;
2787
2788 /*
2789 * Determine which access bits we want to ask for...
2790 */
2791 if (mode & MAY_READ)
2792 args.access |= NFS4_ACCESS_READ;
2793 if (S_ISDIR(inode->i_mode)) {
2794 if (mode & MAY_WRITE)
2795 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2796 if (mode & MAY_EXEC)
2797 args.access |= NFS4_ACCESS_LOOKUP;
2798 } else {
2799 if (mode & MAY_WRITE)
2800 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2801 if (mode & MAY_EXEC)
2802 args.access |= NFS4_ACCESS_EXECUTE;
2803 }
c407d41a
TM		 2804
2805 res.fattr = nfs_alloc_fattr();
2806 if (res.fattr == NULL)
2807 return -ENOMEM;
2808
7c513058 2809 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2810 if (!status) {
6168f62c 2811 nfs_access_set_mask(entry, res.access);
c407d41a 2812 nfs_refresh_inode(inode, res.fattr);
1da177e4 2813 }
c407d41a 2814 nfs_free_fattr(res.fattr);
1da177e4
LT		 2815 return status;
2816}
2817
2818static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2819{
2820 struct nfs4_exception exception = { };
2821 int err;
2822 do {
2823 err = nfs4_handle_exception(NFS_SERVER(inode),
2824 _nfs4_proc_access(inode, entry),
2825 &exception);
2826 } while (exception.retry);
2827 return err;
2828}
2829
2830/*
2831 * TODO: For the time being, we don't try to get any attributes
2832 * along with any of the zero-copy operations READ, READDIR,
2833 * READLINK, WRITE.
2834 *
2835 * In the case of the first three, we want to put the GETATTR
2836 * after the read-type operation -- this is because it is hard
2837 * to predict the length of a GETATTR response in v4, and thus
2838 * align the READ data correctly. This means that the GETATTR
2839 * may end up partially falling into the page cache, and we should
2840 * shift it into the 'tail' of the xdr_buf before processing.
2841 * To do this efficiently, we need to know the total length
2842 * of data received, which doesn't seem to be available outside
2843 * of the RPC layer.
2844 *
2845 * In the case of WRITE, we also want to put the GETATTR after
2846 * the operation -- in this case because we want to make sure
140150db 2847 * we get the post-operation mtime and size.
1da177e4
LT		 2848 *
2849 * Both of these changes to the XDR layer would in fact be quite
2850 * minor, but I decided to leave them for a subsequent patch.
2851 */
2852static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2853 unsigned int pgbase, unsigned int pglen)
2854{
2855 struct nfs4_readlink args = {
2856 .fh = NFS_FH(inode),
2857 .pgbase = pgbase,
2858 .pglen = pglen,
2859 .pages = &page,
2860 };
f50c7000 2861 struct nfs4_readlink_res res;
1da177e4
LT		 2862 struct rpc_message msg = {
2863 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2864 .rpc_argp = &args,
f50c7000 2865 .rpc_resp = &res,
1da177e4
LT		 2866 };
2867
7c513058 2868 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2869}
2870
2871static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2872 unsigned int pgbase, unsigned int pglen)
2873{
2874 struct nfs4_exception exception = { };
2875 int err;
2876 do {
2877 err = nfs4_handle_exception(NFS_SERVER(inode),
2878 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2879 &exception);
2880 } while (exception.retry);
2881 return err;
2882}
2883
1da177e4 2884/*
8867fe58 2885 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2886 */
1da177e4
LT		 2887static int
2888nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2889 int flags)
1da177e4 2890{
8867fe58 2891 struct nfs_open_context *ctx;
1da177e4 2892 struct nfs4_state *state;
1da177e4
LT		 2893 int status = 0;
2894
8867fe58
MS		 2895 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2896 if (IS_ERR(ctx))
2897 return PTR_ERR(ctx);
2898
a8a5da99 2899 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 2900 state = nfs4_do_open(dir, dentry, ctx->mode,
2901 flags, sattr, ctx->cred,
2902 &ctx->mdsthreshold);
d4d9cdcb 2903 d_drop(dentry);
1da177e4
LT		 2904 if (IS_ERR(state)) {
2905 status = PTR_ERR(state);
c0204fd2 2906 goto out;
1da177e4 2907 }
d4d9cdcb 2908 d_add(dentry, igrab(state->inode));
d75340cc 2909 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 2910 ctx->state = state;
1da177e4 2911out:
8867fe58 2912 put_nfs_open_context(ctx);
1da177e4
LT		 2913 return status;
2914}
2915
2916static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2917{
16e42959 2918 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2919 struct nfs_removeargs args = {
1da177e4 2920 .fh = NFS_FH(dir),
26fe5750 2921 .name = *name,
16e42959 2922 };
4fdc17b2 2923 struct nfs_removeres res = {
16e42959 2924 .server = server,
1da177e4 2925 };
1da177e4 2926 struct rpc_message msg = {
4fdc17b2
TM		 2927 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2928 .rpc_argp = &args,
2929 .rpc_resp = &res,
1da177e4 2930 };
778d2817 2931 int status;
1da177e4 2932
7c513058 2933 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 2934 if (status == 0)
16e42959 2935 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 2936 return status;
2937}
2938
2939static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2940{
2941 struct nfs4_exception exception = { };
2942 int err;
2943 do {
2944 err = nfs4_handle_exception(NFS_SERVER(dir),
2945 _nfs4_proc_remove(dir, name),
2946 &exception);
2947 } while (exception.retry);
2948 return err;
2949}
2950
e4eff1a6 2951static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2952{
e4eff1a6
TM		 2953 struct nfs_server *server = NFS_SERVER(dir);
2954 struct nfs_removeargs *args = msg->rpc_argp;
2955 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2956
e4eff1a6 2957 res->server = server;
1da177e4 2958 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 2959 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 2960}
2961
34e137cc
BS		 2962static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2963{
d9afbd1b
TM		 2964 nfs4_setup_sequence(NFS_SERVER(data->dir),
2965 &data->args.seq_args,
2966 &data->res.seq_res,
2967 task);
1da177e4
LT		 2968}
2969
e4eff1a6 2970static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2971{
e4eff1a6
TM		 2972 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2973
14516c3a
TM		 2974 if (!nfs4_sequence_done(task, &res->seq_res))
2975 return 0;
9e33bed5 2976 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2977 return 0;
2978 update_changeattr(dir, &res->cinfo);
e4eff1a6 2979 return 1;
1da177e4
LT		 2980}
2981
d3d4152a
JL		 2982static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2983{
2984 struct nfs_server *server = NFS_SERVER(dir);
2985 struct nfs_renameargs *arg = msg->rpc_argp;
2986 struct nfs_renameres *res = msg->rpc_resp;
2987
2988 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 2989 res->server = server;
9d12b216 2990 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 2991}
2992
c6bfa1a1
BS		 2993static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2994{
d9afbd1b
TM		 2995 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2996 &data->args.seq_args,
2997 &data->res.seq_res,
2998 task);
d3d4152a
JL		 2999}
3000
3001static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3002 struct inode *new_dir)
3003{
3004 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3005
3006 if (!nfs4_sequence_done(task, &res->seq_res))
3007 return 0;
3008 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3009 return 0;
3010
3011 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3012 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3013 return 1;
3014}
3015
1da177e4
LT		 3016static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3017 struct inode *new_dir, struct qstr *new_name)
3018{
6caf2c82 3019 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3020 struct nfs_renameargs arg = {
1da177e4
LT		 3021 .old_dir = NFS_FH(old_dir),
3022 .new_dir = NFS_FH(new_dir),
3023 .old_name = old_name,
3024 .new_name = new_name,
6caf2c82 3025 };
e8582a8b 3026 struct nfs_renameres res = {
6caf2c82 3027 .server = server,
1da177e4 3028 };
1da177e4
LT		 3029 struct rpc_message msg = {
3030 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3031 .rpc_argp = &arg,
3032 .rpc_resp = &res,
3033 };
011fff72 3034 int status = -ENOMEM;
1da177e4 3035
7c513058 3036 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3037 if (!status) {
3038 update_changeattr(old_dir, &res.old_cinfo);
3039 update_changeattr(new_dir, &res.new_cinfo);
3040 }
3041 return status;
3042}
3043
3044static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3045 struct inode *new_dir, struct qstr *new_name)
3046{
3047 struct nfs4_exception exception = { };
3048 int err;
3049 do {
3050 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3051 _nfs4_proc_rename(old_dir, old_name,
3052 new_dir, new_name),
3053 &exception);
3054 } while (exception.retry);
3055 return err;
3056}
3057
3058static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3059{
91ba2eee 3060 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3061 struct nfs4_link_arg arg = {
3062 .fh = NFS_FH(inode),
3063 .dir_fh = NFS_FH(dir),
3064 .name = name,
91ba2eee
TM		 3065 .bitmask = server->attr_bitmask,
3066 };
91ba2eee
TM		 3067 struct nfs4_link_res res = {
3068 .server = server,
1da177e4 3069 };
1da177e4
LT		 3070 struct rpc_message msg = {
3071 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3072 .rpc_argp = &arg,
91ba2eee 3073 .rpc_resp = &res,
1da177e4 3074 };
136f2627
TM		 3075 int status = -ENOMEM;
3076
3077 res.fattr = nfs_alloc_fattr();
778d2817 3078 if (res.fattr == NULL)
136f2627 3079 goto out;
1da177e4 3080
7c513058 3081 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3082 if (!status) {
3083 update_changeattr(dir, &res.cinfo);
73a3d07c 3084 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3085 }
136f2627 3086out:
136f2627 3087 nfs_free_fattr(res.fattr);
1da177e4
LT		 3088 return status;
3089}
3090
3091static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3092{
3093 struct nfs4_exception exception = { };
3094 int err;
3095 do {
3096 err = nfs4_handle_exception(NFS_SERVER(inode),
3097 _nfs4_proc_link(inode, dir, name),
3098 &exception);
3099 } while (exception.retry);
3100 return err;
3101}
3102
57dc9a57
TM		 3103struct nfs4_createdata {
3104 struct rpc_message msg;
3105 struct nfs4_create_arg arg;
3106 struct nfs4_create_res res;
3107 struct nfs_fh fh;
3108 struct nfs_fattr fattr;
57dc9a57
TM		 3109};
3110
3111static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3112 struct qstr *name, struct iattr *sattr, u32 ftype)
3113{
3114 struct nfs4_createdata *data;
3115
3116 data = kzalloc(sizeof(*data), GFP_KERNEL);
3117 if (data != NULL) {
3118 struct nfs_server *server = NFS_SERVER(dir);
3119
3120 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3121 data->msg.rpc_argp = &data->arg;
3122 data->msg.rpc_resp = &data->res;
3123 data->arg.dir_fh = NFS_FH(dir);
3124 data->arg.server = server;
3125 data->arg.name = name;
3126 data->arg.attrs = sattr;
3127 data->arg.ftype = ftype;
3128 data->arg.bitmask = server->attr_bitmask;
3129 data->res.server = server;
3130 data->res.fh = &data->fh;
3131 data->res.fattr = &data->fattr;
57dc9a57 3132 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3133 }
3134 return data;
3135}
3136
3137static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3138{
7c513058 3139 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3140 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3141 if (status == 0) {
3142 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3143 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3144 }
3145 return status;
3146}
3147
3148static void nfs4_free_createdata(struct nfs4_createdata *data)
3149{
3150 kfree(data);
3151}
3152
4f390c15 3153static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3154 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3155{
57dc9a57
TM		 3156 struct nfs4_createdata *data;
3157 int status = -ENAMETOOLONG;
1da177e4 3158
94a6d753 3159 if (len > NFS4_MAXPATHLEN)
57dc9a57 3160 goto out;
4f390c15 3161
57dc9a57
TM		 3162 status = -ENOMEM;
3163 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3164 if (data == NULL)
3165 goto out;
3166
3167 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3168 data->arg.u.symlink.pages = &page;
3169 data->arg.u.symlink.len = len;
1da177e4 3170
57dc9a57
TM		 3171 status = nfs4_do_create(dir, dentry, data);
3172
3173 nfs4_free_createdata(data);
3174out:
1da177e4
LT		 3175 return status;
3176}
3177
4f390c15 3178static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3179 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3180{
3181 struct nfs4_exception exception = { };
3182 int err;
3183 do {
3184 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3185 _nfs4_proc_symlink(dir, dentry, page,
3186 len, sattr),
1da177e4
LT		 3187 &exception);
3188 } while (exception.retry);
3189 return err;
3190}
3191
3192static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3193 struct iattr *sattr)
3194{
57dc9a57
TM		 3195 struct nfs4_createdata *data;
3196 int status = -ENOMEM;
1da177e4 3197
57dc9a57
TM		 3198 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3199 if (data == NULL)
3200 goto out;
3201
3202 status = nfs4_do_create(dir, dentry, data);
3203
3204 nfs4_free_createdata(data);
3205out:
1da177e4
LT		 3206 return status;
3207}
3208
3209static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3210 struct iattr *sattr)
3211{
3212 struct nfs4_exception exception = { };
3213 int err;
a8a5da99
AK		 3214
3215 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3216 do {
3217 err = nfs4_handle_exception(NFS_SERVER(dir),
3218 _nfs4_proc_mkdir(dir, dentry, sattr),
3219 &exception);
3220 } while (exception.retry);
3221 return err;
3222}
3223
3224static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3225 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3226{
3227 struct inode *dir = dentry->d_inode;
3228 struct nfs4_readdir_arg args = {
3229 .fh = NFS_FH(dir),
56e4ebf8 3230 .pages = pages,
1da177e4
LT		 3231 .pgbase = 0,
3232 .count = count,
96d25e53 3233 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3234 .plus = plus,
1da177e4
LT		 3235 };
3236 struct nfs4_readdir_res res;
3237 struct rpc_message msg = {
3238 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3239 .rpc_argp = &args,
3240 .rpc_resp = &res,
3241 .rpc_cred = cred,
3242 };
3243 int status;
3244
3110ff80 3245 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3246 dentry->d_parent->d_name.name,
3247 dentry->d_name.name,
3248 (unsigned long long)cookie);
c3f52af3 3249 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3250 res.pgbase = args.pgbase;
7c513058 3251 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3252 if (status >= 0) {
c3f52af3 3253 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3254 status += args.pgbase;
3255 }
c4812998
TM		 3256
3257 nfs_invalidate_atime(dir);
3258
3110ff80 3259 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3260 return status;
3261}
3262
3263static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3264 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3265{
3266 struct nfs4_exception exception = { };
3267 int err;
3268 do {
3269 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3270 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3271 pages, count, plus),
1da177e4
LT		 3272 &exception);
3273 } while (exception.retry);
3274 return err;
3275}
3276
3277static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3278 struct iattr *sattr, dev_t rdev)
3279{
57dc9a57
TM		 3280 struct nfs4_createdata *data;
3281 int mode = sattr->ia_mode;
3282 int status = -ENOMEM;
1da177e4 3283
57dc9a57
TM		 3284 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3285 if (data == NULL)
3286 goto out;
3287
1da177e4 3288 if (S_ISFIFO(mode))
57dc9a57 3289 data->arg.ftype = NF4FIFO;
1da177e4 3290 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3291 data->arg.ftype = NF4BLK;
3292 data->arg.u.device.specdata1 = MAJOR(rdev);
3293 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3294 }
3295 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3296 data->arg.ftype = NF4CHR;
3297 data->arg.u.device.specdata1 = MAJOR(rdev);
3298 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3299 } else if (!S_ISSOCK(mode)) {
3300 status = -EINVAL;
3301 goto out_free;
1da177e4 3302 }
1da177e4 3303
57dc9a57 3304 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3305out_free:
57dc9a57
TM		 3306 nfs4_free_createdata(data);
3307out:
1da177e4
LT		 3308 return status;
3309}
3310
3311static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3312 struct iattr *sattr, dev_t rdev)
3313{
3314 struct nfs4_exception exception = { };
3315 int err;
a8a5da99
AK		 3316
3317 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3318 do {
3319 err = nfs4_handle_exception(NFS_SERVER(dir),
3320 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3321 &exception);
3322 } while (exception.retry);
3323 return err;
3324}
3325
3326static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3327 struct nfs_fsstat *fsstat)
3328{
3329 struct nfs4_statfs_arg args = {
3330 .fh = fhandle,
3331 .bitmask = server->attr_bitmask,
3332 };
24ad148a
BH		 3333 struct nfs4_statfs_res res = {
3334 .fsstat = fsstat,
3335 };
1da177e4
LT		 3336 struct rpc_message msg = {
3337 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3338 .rpc_argp = &args,
24ad148a 3339 .rpc_resp = &res,
1da177e4
LT		 3340 };
3341
0e574af1 3342 nfs_fattr_init(fsstat->fattr);
7c513058 3343 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3344}
3345
3346static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3347{
3348 struct nfs4_exception exception = { };
3349 int err;
3350 do {
3351 err = nfs4_handle_exception(server,
3352 _nfs4_proc_statfs(server, fhandle, fsstat),
3353 &exception);
3354 } while (exception.retry);
3355 return err;
3356}
3357
3358static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3359 struct nfs_fsinfo *fsinfo)
3360{
3361 struct nfs4_fsinfo_arg args = {
3362 .fh = fhandle,
3363 .bitmask = server->attr_bitmask,
3364 };
3dda5e43
BH		 3365 struct nfs4_fsinfo_res res = {
3366 .fsinfo = fsinfo,
3367 };
1da177e4
LT		 3368 struct rpc_message msg = {
3369 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3370 .rpc_argp = &args,
3dda5e43 3371 .rpc_resp = &res,
1da177e4
LT		 3372 };
3373
7c513058 3374 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3375}
3376
3377static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3378{
3379 struct nfs4_exception exception = { };
3380 int err;
3381
3382 do {
3383 err = nfs4_handle_exception(server,
3384 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3385 &exception);
3386 } while (exception.retry);
3387 return err;
3388}
3389
3390static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3391{
e38eb650
BS		 3392 int error;
3393
0e574af1 3394 nfs_fattr_init(fsinfo->fattr);
e38eb650 3395 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3396 if (error == 0) {
3397 /* block layout checks this! */
3398 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3399 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3400 }
e38eb650
BS		 3401
3402 return error;
1da177e4
LT		 3403}
3404
3405static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3406 struct nfs_pathconf *pathconf)
3407{
3408 struct nfs4_pathconf_arg args = {
3409 .fh = fhandle,
3410 .bitmask = server->attr_bitmask,
3411 };
d45b2989
BH		 3412 struct nfs4_pathconf_res res = {
3413 .pathconf = pathconf,
3414 };
1da177e4
LT		 3415 struct rpc_message msg = {
3416 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3417 .rpc_argp = &args,
d45b2989 3418 .rpc_resp = &res,
1da177e4
LT		 3419 };
3420
3421 /* None of the pathconf attributes are mandatory to implement */
3422 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3423 memset(pathconf, 0, sizeof(*pathconf));
3424 return 0;
3425 }
3426
0e574af1 3427 nfs_fattr_init(pathconf->fattr);
7c513058 3428 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3429}
3430
3431static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3432 struct nfs_pathconf *pathconf)
3433{
3434 struct nfs4_exception exception = { };
3435 int err;
3436
3437 do {
3438 err = nfs4_handle_exception(server,
3439 _nfs4_proc_pathconf(server, fhandle, pathconf),
3440 &exception);
3441 } while (exception.retry);
3442 return err;
3443}
3444
d20581aa
BH		 3445void __nfs4_read_done_cb(struct nfs_read_data *data)
3446{
cd841605 3447 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3448}
3449
cbdabc7f 3450static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3451{
cd841605 3452 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3453
9e33bed5 3454 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3455 rpc_restart_call_prepare(task);
ec06c096 3456 return -EAGAIN;
1da177e4 3457 }
8850df99 3458
d20581aa 3459 __nfs4_read_done_cb(data);
1da177e4 3460 if (task->tk_status > 0)
ec06c096
TM		 3461 renew_lease(server, data->timestamp);
3462 return 0;
1da177e4
LT		 3463}
3464
cbdabc7f
AA		 3465static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3466{
3467
3468 dprintk("--> %s\n", __func__);
3469
3470 if (!nfs4_sequence_done(task, &data->res.seq_res))
3471 return -EAGAIN;
3472
d20581aa
BH		 3473 return data->read_done_cb ? data->read_done_cb(task, data) :
3474 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3475}
3476
bdc7f021 3477static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3478{
1da177e4 3479 data->timestamp = jiffies;
cbdabc7f 3480 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3481 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3482 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3483}
3484
ea7c3303
BS		 3485static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3486{
d9afbd1b
TM		 3487 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3488 &data->args.seq_args,
3489 &data->res.seq_res,
3490 task);
1da177e4
LT		 3491}
3492
b029bc9b 3493static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3494{
cd841605 3495 struct inode *inode = data->header->inode;
1da177e4 3496
9e33bed5 3497 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3498 rpc_restart_call_prepare(task);
788e7a89 3499 return -EAGAIN;
1da177e4 3500 }
4f9838c7 3501 if (task->tk_status >= 0) {
1da177e4 3502 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3503 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3504 }
788e7a89 3505 return 0;
1da177e4
LT		 3506}
3507
b029bc9b
FI		 3508static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3509{
3510 if (!nfs4_sequence_done(task, &data->res.seq_res))
3511 return -EAGAIN;
d20581aa
BH		 3512 return data->write_done_cb ? data->write_done_cb(task, data) :
3513 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3514}
3515
5a37f851
TM		 3516static
3517bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3518{
5a37f851
TM		 3519 const struct nfs_pgio_header *hdr = data->header;
3520
3521 /* Don't request attributes for pNFS or O_DIRECT writes */
3522 if (data->ds_clp != NULL || hdr->dreq != NULL)
3523 return false;
3524 /* Otherwise, request attributes if and only if we don't hold
3525 * a delegation
3526 */
011e2a7f 3527 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3528}
a69aef14 3529
bdc7f021 3530static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3531{
cd841605 3532 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3533
5a37f851 3534 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3535 data->args.bitmask = NULL;
3536 data->res.fattr = NULL;
3537 } else
3538 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3539
b029bc9b
FI		 3540 if (!data->write_done_cb)
3541 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3542 data->res.server = server;
1da177e4
LT		 3543 data->timestamp = jiffies;
3544
bdc7f021 3545 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3546 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3547}
3548
c6cb80d0
BS		 3549static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3550{
d9afbd1b
TM		 3551 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3552 &data->args.seq_args,
3553 &data->res.seq_res,
3554 task);
1da177e4
LT		 3555}
3556
0b7c0153 3557static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3558{
d9afbd1b
TM		 3559 nfs4_setup_sequence(NFS_SERVER(data->inode),
3560 &data->args.seq_args,
3561 &data->res.seq_res,
3562 task);
1da177e4
LT		 3563}
3564
0b7c0153 3565static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3566{
1da177e4 3567 struct inode *inode = data->inode;
14516c3a 3568
9e33bed5 3569 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3570 rpc_restart_call_prepare(task);
788e7a89 3571 return -EAGAIN;
1da177e4 3572 }
788e7a89 3573 return 0;
1da177e4
LT		 3574}
3575
0b7c0153 3576static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3577{
3578 if (!nfs4_sequence_done(task, &data->res.seq_res))
3579 return -EAGAIN;
0b7c0153 3580 return data->commit_done_cb(task, data);
5f452431
FI		 3581}
3582
0b7c0153 3583static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3584{
788e7a89 3585 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3586
0b7c0153
FI		 3587 if (data->commit_done_cb == NULL)
3588 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3589 data->res.server = server;
bdc7f021 3590 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3591 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3592}
3593
9bc4e3ca
CL		 3594struct nfs4_renewdata {
3595 struct nfs_client *client;
3596 unsigned long timestamp;
3597};
3598
1da177e4
LT		 3599/*
3600 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3601 * standalone procedure for queueing an asynchronous RENEW.
3602 */
9bc4e3ca 3603static void nfs4_renew_release(void *calldata)
dc96aef9 3604{
9bc4e3ca
CL		 3605 struct nfs4_renewdata *data = calldata;
3606 struct nfs_client *clp = data->client;
dc96aef9 3607
0851de06
AB		 3608 if (atomic_read(&clp->cl_count) > 1)
3609 nfs4_schedule_state_renewal(clp);
3610 nfs_put_client(clp);
9bc4e3ca 3611 kfree(data);
dc96aef9
AB		 3612}
3613
9bc4e3ca 3614static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3615{
9bc4e3ca
CL		 3616 struct nfs4_renewdata *data = calldata;
3617 struct nfs_client *clp = data->client;
3618 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3619
3620 if (task->tk_status < 0) {
95baa25c 3621 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3622 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3623 return;
3624 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3625 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3626 return;
3627 }
3628 nfs4_schedule_path_down_recovery(clp);
1da177e4 3629 }
452e9352 3630 do_renew_lease(clp, timestamp);
1da177e4
LT		 3631}
3632
963d8fe5
TM		 3633static const struct rpc_call_ops nfs4_renew_ops = {
3634 .rpc_call_done = nfs4_renew_done,
dc96aef9 3635 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3636};
3637
2f60ea6b 3638static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3639{
3640 struct rpc_message msg = {
3641 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3642 .rpc_argp = clp,
b4454fe1 3643 .rpc_cred = cred,
1da177e4 3644 };
9bc4e3ca 3645 struct nfs4_renewdata *data;
1da177e4 3646
2f60ea6b
TM		 3647 if (renew_flags == 0)
3648 return 0;
0851de06
AB		 3649 if (!atomic_inc_not_zero(&clp->cl_count))
3650 return -EIO;
b569ad34 3651 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3652 if (data == NULL)
3653 return -ENOMEM;
3654 data->client = clp;
3655 data->timestamp = jiffies;
1da177e4 3656 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3657 &nfs4_renew_ops, data);
1da177e4
LT		 3658}
3659
8534d4ec 3660static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3661{
3662 struct rpc_message msg = {
3663 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3664 .rpc_argp = clp,
b4454fe1 3665 .rpc_cred = cred,
1da177e4
LT		 3666 };
3667 unsigned long now = jiffies;
3668 int status;
3669
3670 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3671 if (status < 0)
3672 return status;
452e9352 3673 do_renew_lease(clp, now);
1da177e4
LT		 3674 return 0;
3675}
3676
aa1870af
BF		 3677static inline int nfs4_server_supports_acls(struct nfs_server *server)
3678{
3679 return (server->caps & NFS_CAP_ACLS)
3680 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3681 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3682}
3683
21f498c2
TM		 3684/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3685 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3686 * the stack.
3687 */
21f498c2 3688#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3689
e9e3d724
NH		 3690static int buf_to_pages_noslab(const void *buf, size_t buflen,
3691 struct page **pages, unsigned int *pgbase)
3692{
3693 struct page *newpage, **spages;
3694 int rc = 0;
3695 size_t len;
3696 spages = pages;
3697
3698 do {
21f498c2 3699 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3700 newpage = alloc_page(GFP_KERNEL);
3701
3702 if (newpage == NULL)
3703 goto unwind;
3704 memcpy(page_address(newpage), buf, len);
3705 buf += len;
3706 buflen -= len;
3707 *pages++ = newpage;
3708 rc++;
3709 } while (buflen != 0);
3710
3711 return rc;
3712
3713unwind:
3714 for(; rc > 0; rc--)
3715 __free_page(spages[rc-1]);
3716 return -ENOMEM;
3717}
3718
e50a1c2e
BF		 3719struct nfs4_cached_acl {
3720 int cached;
3721 size_t len;
3e9d4154 3722 char data[0];
e50a1c2e
BF		 3723};
3724
3725static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3726{
3727 struct nfs_inode *nfsi = NFS_I(inode);
3728
3729 spin_lock(&inode->i_lock);
3730 kfree(nfsi->nfs4_acl);
3731 nfsi->nfs4_acl = acl;
3732 spin_unlock(&inode->i_lock);
3733}
3734
3735static void nfs4_zap_acl_attr(struct inode *inode)
3736{
3737 nfs4_set_cached_acl(inode, NULL);
3738}
3739
3740static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3741{
3742 struct nfs_inode *nfsi = NFS_I(inode);
3743 struct nfs4_cached_acl *acl;
3744 int ret = -ENOENT;
3745
3746 spin_lock(&inode->i_lock);
3747 acl = nfsi->nfs4_acl;
3748 if (acl == NULL)
3749 goto out;
3750 if (buf == NULL) /* user is just asking for length */
3751 goto out_len;
3752 if (acl->cached == 0)
3753 goto out;
3754 ret = -ERANGE; /* see getxattr(2) man page */
3755 if (acl->len > buflen)
3756 goto out;
3757 memcpy(buf, acl->data, acl->len);
3758out_len:
3759 ret = acl->len;
3760out:
3761 spin_unlock(&inode->i_lock);
3762 return ret;
3763}
3764
5794d21e 3765static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3766{
3767 struct nfs4_cached_acl *acl;
b291f1b1 3768 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3769
1f1ea6c2 3770 if (buflen <= PAGE_SIZE) {
b291f1b1 3771 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3772 if (acl == NULL)
3773 goto out;
3774 acl->cached = 1;
5794d21e 3775 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3776 } else {
3777 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3778 if (acl == NULL)
3779 goto out;
3780 acl->cached = 0;
3781 }
3782 acl->len = acl_len;
3783out:
3784 nfs4_set_cached_acl(inode, acl);
3785}
3786
bf118a34
AA		 3787/*
3788 * The getxattr API returns the required buffer length when called with a
3789 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3790 * the required buf. On a NULL buf, we send a page of data to the server
3791 * guessing that the ACL request can be serviced by a page. If so, we cache
3792 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3793 * the cache. If not so, we throw away the page, and cache the required
3794 * length. The next getxattr call will then produce another round trip to
3795 * the server, this time with the input buf of the required size.
3796 */
16b4289c 3797static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3798{
bf118a34 3799 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3800 struct nfs_getaclargs args = {
3801 .fh = NFS_FH(inode),
3802 .acl_pages = pages,
3803 .acl_len = buflen,
3804 };
663c79b3
BH		 3805 struct nfs_getaclres res = {
3806 .acl_len = buflen,
3807 };
aa1870af
BF		 3808 struct rpc_message msg = {
3809 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3810 .rpc_argp = &args,
663c79b3 3811 .rpc_resp = &res,
aa1870af 3812 };
21f498c2
TM		 3813 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3814 int ret = -ENOMEM, i;
aa1870af 3815
bf118a34
AA		 3816 /* As long as we're doing a round trip to the server anyway,
3817 * let's be prepared for a page of acl data. */
3818 if (npages == 0)
3819 npages = 1;
21f498c2
TM		 3820 if (npages > ARRAY_SIZE(pages))
3821 return -ERANGE;
5a006899 3822
bf118a34
AA		 3823 for (i = 0; i < npages; i++) {
3824 pages[i] = alloc_page(GFP_KERNEL);
3825 if (!pages[i])
3826 goto out_free;
e50a1c2e 3827 }
5a006899
SP		 3828
3829 /* for decoding across pages */
3830 res.acl_scratch = alloc_page(GFP_KERNEL);
3831 if (!res.acl_scratch)
3832 goto out_free;
3833
bf118a34
AA		 3834 args.acl_len = npages * PAGE_SIZE;
3835 args.acl_pgbase = 0;
5a006899 3836
de040bec 3837 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3838 __func__, buf, buflen, npages, args.acl_len);
3839 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3840 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3841 if (ret)
3842 goto out_free;
bf118a34 3843
1f1ea6c2
TM		 3844 /* Handle the case where the passed-in buffer is too short */
3845 if (res.acl_flags & NFS4_ACL_TRUNC) {
3846 /* Did the user only issue a request for the acl length? */
3847 if (buf == NULL)
3848 goto out_ok;
e50a1c2e 3849 ret = -ERANGE;
1f1ea6c2 3850 goto out_free;
e50a1c2e 3851 }
1f1ea6c2 3852 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 3853 if (buf) {
3854 if (res.acl_len > buflen) {
3855 ret = -ERANGE;
3856 goto out_free;
3857 }
1f1ea6c2 3858 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 3859 }
1f1ea6c2
TM		 3860out_ok:
3861 ret = res.acl_len;
e50a1c2e 3862out_free:
bf118a34
AA		 3863 for (i = 0; i < npages; i++)
3864 if (pages[i])
3865 __free_page(pages[i]);
331818f1
TM		 3866 if (res.acl_scratch)
3867 __free_page(res.acl_scratch);
aa1870af
BF		 3868 return ret;
3869}
3870
16b4289c
TM		 3871static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3872{
3873 struct nfs4_exception exception = { };
3874 ssize_t ret;
3875 do {
3876 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3877 if (ret >= 0)
3878 break;
3879 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3880 } while (exception.retry);
3881 return ret;
3882}
3883
e50a1c2e
BF		 3884static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3885{
3886 struct nfs_server *server = NFS_SERVER(inode);
3887 int ret;
3888
3889 if (!nfs4_server_supports_acls(server))
3890 return -EOPNOTSUPP;
3891 ret = nfs_revalidate_inode(server, inode);
3892 if (ret < 0)
3893 return ret;
08a22b39
AK		 3894 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3895 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3896 ret = nfs4_read_cached_acl(inode, buf, buflen);
3897 if (ret != -ENOENT)
bf118a34
AA		 3898 /* -ENOENT is returned if there is no ACL or if there is an ACL
3899 * but no cached acl data, just the acl length */
e50a1c2e
BF		 3900 return ret;
3901 return nfs4_get_acl_uncached(inode, buf, buflen);
3902}
3903
16b4289c 3904static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3905{
3906 struct nfs_server *server = NFS_SERVER(inode);
3907 struct page *pages[NFS4ACL_MAXPAGES];
3908 struct nfs_setaclargs arg = {
3909 .fh = NFS_FH(inode),
3910 .acl_pages = pages,
3911 .acl_len = buflen,
3912 };
73c403a9 3913 struct nfs_setaclres res;
4b580ee3
BF		 3914 struct rpc_message msg = {
3915 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3916 .rpc_argp = &arg,
73c403a9 3917 .rpc_resp = &res,
4b580ee3 3918 };
21f498c2 3919 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 3920 int ret, i;
4b580ee3
BF		 3921
3922 if (!nfs4_server_supports_acls(server))
3923 return -EOPNOTSUPP;
21f498c2
TM		 3924 if (npages > ARRAY_SIZE(pages))
3925 return -ERANGE;
e9e3d724
NH		 3926 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3927 if (i < 0)
3928 return i;
57ec14c5 3929 nfs4_inode_return_delegation(inode);
7c513058 3930 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3931
3932 /*
3933 * Free each page after tx, so the only ref left is
3934 * held by the network stack
3935 */
3936 for (; i > 0; i--)
3937 put_page(pages[i-1]);
3938
08a22b39
AK		 3939 /*
3940 * Acl update can result in inode attribute update.
3941 * so mark the attribute cache invalid.
3942 */
3943 spin_lock(&inode->i_lock);
3944 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3945 spin_unlock(&inode->i_lock);
f41f7418
TM		 3946 nfs_access_zap_cache(inode);
3947 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3948 return ret;
3949}
3950
16b4289c
TM		 3951static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3952{
3953 struct nfs4_exception exception = { };
3954 int err;
3955 do {
3956 err = nfs4_handle_exception(NFS_SERVER(inode),
3957 __nfs4_proc_set_acl(inode, buf, buflen),
3958 &exception);
3959 } while (exception.retry);
3960 return err;
3961}
3962
1da177e4 3963static int
aa5190d0 3964nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3965{
aa5190d0
TM		 3966 struct nfs_client *clp = server->nfs_client;
3967
3968 if (task->tk_status >= 0)
1da177e4
LT		 3969 return 0;
3970 switch(task->tk_status) {
a1d0b5ee 3971 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 3972 case -NFS4ERR_ADMIN_REVOKED:
3973 case -NFS4ERR_BAD_STATEID:
14977489
TM		 3974 if (state == NULL)
3975 break;
3976 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 3977 case -NFS4ERR_OPENMODE:
3978 if (state == NULL)
3979 break;
0400a6b0
TM		 3980 nfs4_schedule_stateid_recovery(server, state);
3981 goto wait_on_recovery;
0ced63d1
TM		 3982 case -NFS4ERR_EXPIRED:
3983 if (state != NULL)
3984 nfs4_schedule_stateid_recovery(server, state);
1da177e4 3985 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3986 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 3987 nfs4_schedule_lease_recovery(clp);
3988 goto wait_on_recovery;
4745e315
AA		 3989#if defined(CONFIG_NFS_V4_1)
3990 case -NFS4ERR_BADSESSION:
3991 case -NFS4ERR_BADSLOT:
3992 case -NFS4ERR_BAD_HIGH_SLOT:
3993 case -NFS4ERR_DEADSESSION:
3994 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3995 case -NFS4ERR_SEQ_FALSE_RETRY:
3996 case -NFS4ERR_SEQ_MISORDERED:
3997 dprintk("%s ERROR %d, Reset session\n", __func__,
3998 task->tk_status);
9f594791 3999 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4000 task->tk_status = 0;
4001 return -EAGAIN;
4002#endif /* CONFIG_NFS_V4_1 */
1da177e4 4003 case -NFS4ERR_DELAY:
aa5190d0 4004 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4005 case -NFS4ERR_GRACE:
1da177e4
LT		 4006 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4007 task->tk_status = 0;
4008 return -EAGAIN;
a8a4ae3a 4009 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4010 case -NFS4ERR_OLD_STATEID:
4011 task->tk_status = 0;
4012 return -EAGAIN;
4013 }
4014 task->tk_status = nfs4_map_errors(task->tk_status);
4015 return 0;
0400a6b0 4016wait_on_recovery:
a2c0b9e2 4017 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4018 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4019 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4020 task->tk_status = 0;
4021 return -EAGAIN;
1da177e4
LT		 4022}
4023
f092075d
CL		 4024static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4025 nfs4_verifier *bootverf)
cd93710e
CL		 4026{
4027 __be32 verf[2];
4028
2c820d9a
CL		 4029 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4030 /* An impossible timestamp guarantees this value
4031 * will never match a generated boot time. */
4032 verf[0] = 0;
4033 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4034 } else {
f092075d
CL		 4035 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4036 verf[0] = (__be32)nn->boot_time.tv_sec;
4037 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4038 }
cd93710e
CL		 4039 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4040}
4041
e984a55a
CL		 4042static unsigned int
4043nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4044 char *buf, size_t len)
4045{
4046 unsigned int result;
4047
4048 rcu_read_lock();
4049 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4050 clp->cl_ipaddr,
4051 rpc_peeraddr2str(clp->cl_rpcclient,
4052 RPC_DISPLAY_ADDR),
4053 rpc_peeraddr2str(clp->cl_rpcclient,
4054 RPC_DISPLAY_PROTO));
4055 rcu_read_unlock();
4056 return result;
4057}
4058
4059static unsigned int
4060nfs4_init_uniform_client_string(const struct nfs_client *clp,
4061 char *buf, size_t len)
4062{
6f2ea7f2
CL		 4063 char *nodename = clp->cl_rpcclient->cl_nodename;
4064
4065 if (nfs4_client_id_uniquifier[0] != '\0')
4066 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4067 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4068 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4069 nodename);
e984a55a
CL		 4070}
4071
6bbb4ae8
CL		 4072/**
4073 * nfs4_proc_setclientid - Negotiate client ID
4074 * @clp: state data structure
4075 * @program: RPC program for NFSv4 callback service
4076 * @port: IP port number for NFS4 callback service
4077 * @cred: RPC credential to use for this call
4078 * @res: where to place the result
4079 *
4080 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4081 */
bb8b27e5
TM		 4082int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4083 unsigned short port, struct rpc_cred *cred,
4084 struct nfs4_setclientid_res *res)
1da177e4
LT		 4085{
4086 nfs4_verifier sc_verifier;
4087 struct nfs4_setclientid setclientid = {
4088 .sc_verifier = &sc_verifier,
4089 .sc_prog = program,
f4eecd5d 4090 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4091 };
4092 struct rpc_message msg = {
4093 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4094 .rpc_argp = &setclientid,
bb8b27e5 4095 .rpc_resp = res,
286d7d6a 4096 .rpc_cred = cred,
1da177e4 4097 };
6bbb4ae8 4098 int status;
1da177e4 4099
de734831 4100 /* nfs_client_id4 */
f092075d 4101 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4102 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4103 setclientid.sc_name_len =
4104 nfs4_init_uniform_client_string(clp,
4105 setclientid.sc_name,
4106 sizeof(setclientid.sc_name));
4107 else
4108 setclientid.sc_name_len =
4109 nfs4_init_nonuniform_client_string(clp,
4110 setclientid.sc_name,
4111 sizeof(setclientid.sc_name));
de734831 4112 /* cb_client4 */
e984a55a 4113 rcu_read_lock();
de734831 4114 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4115 sizeof(setclientid.sc_netid),
4116 rpc_peeraddr2str(clp->cl_rpcclient,
4117 RPC_DISPLAY_NETID));
de734831
CL		 4118 rcu_read_unlock();
4119 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4120 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4121 clp->cl_ipaddr, port >> 8, port & 255);
4122
6bbb4ae8
CL		 4123 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4124 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4125 setclientid.sc_name_len, setclientid.sc_name);
4126 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4127 dprintk("NFS reply setclientid: %d\n", status);
4128 return status;
1da177e4
LT		 4129}
4130
6bbb4ae8
CL		 4131/**
4132 * nfs4_proc_setclientid_confirm - Confirm client ID
4133 * @clp: state data structure
4134 * @res: result of a previous SETCLIENTID
4135 * @cred: RPC credential to use for this call
4136 *
4137 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4138 */
fd954ae1 4139int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4140 struct nfs4_setclientid_res *arg,
4141 struct rpc_cred *cred)
1da177e4
LT		 4142{
4143 struct nfs_fsinfo fsinfo;
4144 struct rpc_message msg = {
4145 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4146 .rpc_argp = arg,
1da177e4 4147 .rpc_resp = &fsinfo,
286d7d6a 4148 .rpc_cred = cred,
1da177e4
LT		 4149 };
4150 unsigned long now;
4151 int status;
4152
6bbb4ae8
CL		 4153 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4154 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4155 clp->cl_clientid);
1da177e4 4156 now = jiffies;
1bd714f2 4157 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4158 if (status == 0) {
4159 spin_lock(&clp->cl_lock);
4160 clp->cl_lease_time = fsinfo.lease_time * HZ;
4161 clp->cl_last_renewal = now;
4162 spin_unlock(&clp->cl_lock);
4163 }
6bbb4ae8 4164 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4165 return status;
4166}
4167
fe650407
TM		 4168struct nfs4_delegreturndata {
4169 struct nfs4_delegreturnargs args;
fa178f29 4170 struct nfs4_delegreturnres res;
fe650407
TM		 4171 struct nfs_fh fh;
4172 nfs4_stateid stateid;
26e976a8 4173 unsigned long timestamp;
fa178f29 4174 struct nfs_fattr fattr;
fe650407
TM		 4175 int rpc_status;
4176};
4177
fe650407
TM		 4178static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4179{
4180 struct nfs4_delegreturndata *data = calldata;
938e1010 4181
14516c3a
TM		 4182 if (!nfs4_sequence_done(task, &data->res.seq_res))
4183 return;
938e1010 4184
79708861
RL		 4185 switch (task->tk_status) {
4186 case -NFS4ERR_STALE_STATEID:
4187 case -NFS4ERR_EXPIRED:
4188 case 0:
fa178f29 4189 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4190 break;
4191 default:
4192 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4193 -EAGAIN) {
d00c5d43 4194 rpc_restart_call_prepare(task);
79708861
RL		 4195 return;
4196 }
4197 }
4198 data->rpc_status = task->tk_status;
fe650407
TM		 4199}
4200
4201static void nfs4_delegreturn_release(void *calldata)
4202{
fe650407
TM		 4203 kfree(calldata);
4204}
4205
938e1010
AA		 4206#if defined(CONFIG_NFS_V4_1)
4207static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4208{
4209 struct nfs4_delegreturndata *d_data;
4210
4211 d_data = (struct nfs4_delegreturndata *)data;
4212
d9afbd1b
TM		 4213 nfs4_setup_sequence(d_data->res.server,
4214 &d_data->args.seq_args,
4215 &d_data->res.seq_res,
4216 task);
938e1010
AA		 4217}
4218#endif /* CONFIG_NFS_V4_1 */
4219
c8d149f3 4220static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4221#if defined(CONFIG_NFS_V4_1)
4222 .rpc_call_prepare = nfs4_delegreturn_prepare,
4223#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4224 .rpc_call_done = nfs4_delegreturn_done,
4225 .rpc_release = nfs4_delegreturn_release,
4226};
4227
e6f81075 4228static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4229{
4230 struct nfs4_delegreturndata *data;
fa178f29 4231 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4232 struct rpc_task *task;
5138fde0
TM		 4233 struct rpc_message msg = {
4234 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4235 .rpc_cred = cred,
4236 };
c970aa85
TM		 4237 struct rpc_task_setup task_setup_data = {
4238 .rpc_client = server->client,
5138fde0 4239 .rpc_message = &msg,
c970aa85
TM		 4240 .callback_ops = &nfs4_delegreturn_ops,
4241 .flags = RPC_TASK_ASYNC,
4242 };
e6f81075 4243 int status = 0;
fe650407 4244
8535b2be 4245 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4246 if (data == NULL)
4247 return -ENOMEM;
9d12b216 4248 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4249 data->args.fhandle = &data->fh;
4250 data->args.stateid = &data->stateid;
9e907fec 4251 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4252 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4253 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4254 data->res.fattr = &data->fattr;
4255 data->res.server = server;
5138fde0 4256 nfs_fattr_init(data->res.fattr);
26e976a8 4257 data->timestamp = jiffies;
fe650407
TM		 4258 data->rpc_status = 0;
4259
c970aa85 4260 task_setup_data.callback_data = data;
1174dd1f
TM		 4261 msg.rpc_argp = &data->args;
4262 msg.rpc_resp = &data->res;
c970aa85 4263 task = rpc_run_task(&task_setup_data);
7a1218a2 4264 if (IS_ERR(task))
fe650407 4265 return PTR_ERR(task);
e6f81075
TM		 4266 if (!issync)
4267 goto out;
fe650407 4268 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4269 if (status != 0)
4270 goto out;
4271 status = data->rpc_status;
e144cbcc
TM		 4272 if (status == 0)
4273 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4274 else
4275 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4276out:
e6b3c4db 4277 rpc_put_task(task);
fe650407 4278 return status;
1da177e4
LT		 4279}
4280
e6f81075 4281int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4282{
4283 struct nfs_server *server = NFS_SERVER(inode);
4284 struct nfs4_exception exception = { };
4285 int err;
4286 do {
e6f81075 4287 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4288 switch (err) {
4289 case -NFS4ERR_STALE_STATEID:
4290 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4291 case 0:
4292 return 0;
4293 }
4294 err = nfs4_handle_exception(server, err, &exception);
4295 } while (exception.retry);
4296 return err;
4297}
4298
4299#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4300#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4301
4302/*
4303 * sleep, with exponential backoff, and retry the LOCK operation.
4304 */
4305static unsigned long
4306nfs4_set_lock_task_retry(unsigned long timeout)
4307{
d310310c 4308 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4309 timeout <<= 1;
4310 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4311 return NFS4_LOCK_MAXTIMEOUT;
4312 return timeout;
4313}
4314
1da177e4
LT		 4315static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4316{
4317 struct inode *inode = state->inode;
4318 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4319 struct nfs_client *clp = server->nfs_client;
911d1aaf 4320 struct nfs_lockt_args arg = {
1da177e4 4321 .fh = NFS_FH(inode),
911d1aaf 4322 .fl = request,
1da177e4 4323 };
911d1aaf
TM		 4324 struct nfs_lockt_res res = {
4325 .denied = request,
1da177e4
LT		 4326 };
4327 struct rpc_message msg = {
4328 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4329 .rpc_argp = &arg,
4330 .rpc_resp = &res,
4331 .rpc_cred = state->owner->so_cred,
4332 };
1da177e4
LT		 4333 struct nfs4_lock_state *lsp;
4334 int status;
4335
911d1aaf 4336 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4337 status = nfs4_set_lock_state(state, request);
4338 if (status != 0)
4339 goto out;
4340 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4341 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4342 arg.lock_owner.s_dev = server->s_dev;
7c513058 4343 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4344 switch (status) {
4345 case 0:
4346 request->fl_type = F_UNLCK;
4347 break;
4348 case -NFS4ERR_DENIED:
4349 status = 0;
1da177e4 4350 }
70cc6487 4351 request->fl_ops->fl_release_private(request);
8d0a8a9d 4352out:
1da177e4
LT		 4353 return status;
4354}
4355
4356static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4357{
4358 struct nfs4_exception exception = { };
4359 int err;
4360
4361 do {
4362 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4363 _nfs4_proc_getlk(state, cmd, request),
4364 &exception);
4365 } while (exception.retry);
4366 return err;
4367}
4368
4369static int do_vfs_lock(struct file *file, struct file_lock *fl)
4370{
4371 int res = 0;
4372 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4373 case FL_POSIX:
4374 res = posix_lock_file_wait(file, fl);
4375 break;
4376 case FL_FLOCK:
4377 res = flock_lock_file_wait(file, fl);
4378 break;
4379 default:
4380 BUG();
4381 }
1da177e4
LT		 4382 return res;
4383}
4384
faf5f49c 4385struct nfs4_unlockdata {
911d1aaf
TM		 4386 struct nfs_locku_args arg;
4387 struct nfs_locku_res res;
faf5f49c
TM		 4388 struct nfs4_lock_state *lsp;
4389 struct nfs_open_context *ctx;
911d1aaf
TM		 4390 struct file_lock fl;
4391 const struct nfs_server *server;
26e976a8 4392 unsigned long timestamp;
faf5f49c
TM		 4393};
4394
911d1aaf
TM		 4395static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4396 struct nfs_open_context *ctx,
4397 struct nfs4_lock_state *lsp,
4398 struct nfs_seqid *seqid)
4399{
4400 struct nfs4_unlockdata *p;
4401 struct inode *inode = lsp->ls_state->inode;
4402
8535b2be 4403 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4404 if (p == NULL)
4405 return NULL;
4406 p->arg.fh = NFS_FH(inode);
4407 p->arg.fl = &p->fl;
4408 p->arg.seqid = seqid;
c1d51931 4409 p->res.seqid = seqid;
911d1aaf
TM		 4410 p->arg.stateid = &lsp->ls_stateid;
4411 p->lsp = lsp;
4412 atomic_inc(&lsp->ls_count);
4413 /* Ensure we don't close file until we're done freeing locks! */
4414 p->ctx = get_nfs_open_context(ctx);
4415 memcpy(&p->fl, fl, sizeof(p->fl));
4416 p->server = NFS_SERVER(inode);
4417 return p;
4418}
4419
06f814a3 4420static void nfs4_locku_release_calldata(void *data)
faf5f49c 4421{
963d8fe5 4422 struct nfs4_unlockdata *calldata = data;
911d1aaf 4423 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4424 nfs4_put_lock_state(calldata->lsp);
4425 put_nfs_open_context(calldata->ctx);
4426 kfree(calldata);
faf5f49c
TM		 4427}
4428
963d8fe5 4429static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4430{
963d8fe5 4431 struct nfs4_unlockdata *calldata = data;
faf5f49c 4432
14516c3a
TM		 4433 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4434 return;
faf5f49c
TM		 4435 switch (task->tk_status) {
4436 case 0:
f597c537
TM		 4437 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4438 &calldata->res.stateid);
26e976a8 4439 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4440 break;
9e33bed5
TM		 4441 case -NFS4ERR_BAD_STATEID:
4442 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4443 case -NFS4ERR_STALE_STATEID:
4444 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4445 break;
4446 default:
9e33bed5 4447 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4448 rpc_restart_call_prepare(task);
faf5f49c 4449 }
2b1bc308 4450 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4451}
4452
4ce70ada 4453static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4454{
4ce70ada 4455 struct nfs4_unlockdata *calldata = data;
faf5f49c 4456
911d1aaf 4457 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 4458 goto out_wait;
795a88c9 4459 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 4460 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 4461 goto out_no_action;
faf5f49c 4462 }
26e976a8 4463 calldata->timestamp = jiffies;
035168ab 4464 if (nfs4_setup_sequence(calldata->server,
a893693c 4465 &calldata->arg.seq_args,
2240a9e2
TM		 4466 &calldata->res.seq_res,
4467 task) != 0)
4468 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 4469 return;
4470out_no_action:
4471 task->tk_action = NULL;
4472out_wait:
4473 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4474}
4475
963d8fe5 4476static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4477 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4478 .rpc_call_done = nfs4_locku_done,
06f814a3 4479 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4480};
4481
a5d16a4d
TM		 4482static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4483 struct nfs_open_context *ctx,
4484 struct nfs4_lock_state *lsp,
4485 struct nfs_seqid *seqid)
4486{
4487 struct nfs4_unlockdata *data;
5138fde0
TM		 4488 struct rpc_message msg = {
4489 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4490 .rpc_cred = ctx->cred,
4491 };
c970aa85
TM		 4492 struct rpc_task_setup task_setup_data = {
4493 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4494 .rpc_message = &msg,
c970aa85 4495 .callback_ops = &nfs4_locku_ops,
101070ca 4496 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4497 .flags = RPC_TASK_ASYNC,
4498 };
a5d16a4d 4499
137d6aca
FF		 4500 /* Ensure this is an unlock - when canceling a lock, the
4501 * canceled lock is passed in, and it won't be an unlock.
4502 */
4503 fl->fl_type = F_UNLCK;
4504
a5d16a4d
TM		 4505 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4506 if (data == NULL) {
4507 nfs_free_seqid(seqid);
4508 return ERR_PTR(-ENOMEM);
4509 }
4510
9d12b216 4511 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4512 msg.rpc_argp = &data->arg;
4513 msg.rpc_resp = &data->res;
c970aa85
TM		 4514 task_setup_data.callback_data = data;
4515 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4516}
4517
faf5f49c
TM		 4518static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4519{
65b62a29
TM		 4520 struct inode *inode = state->inode;
4521 struct nfs4_state_owner *sp = state->owner;
4522 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 4523 struct nfs_seqid *seqid;
1da177e4 4524 struct nfs4_lock_state *lsp;
06f814a3
TM		 4525 struct rpc_task *task;
4526 int status = 0;
536ff0f8 4527 unsigned char fl_flags = request->fl_flags;
faf5f49c 4528
8d0a8a9d 4529 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4530 /* Unlock _before_ we do the RPC call */
4531 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 4532 /* Exclude nfs_delegation_claim_locks() */
4533 mutex_lock(&sp->so_delegreturn_mutex);
4534 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 4535 down_read(&nfsi->rwsem);
4536 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4537 up_read(&nfsi->rwsem);
65b62a29 4538 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 4539 goto out;
19e03c57
TM		 4540 }
4541 up_read(&nfsi->rwsem);
65b62a29 4542 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 4543 if (status != 0)
9b073574
TM		 4544 goto out;
4545 /* Is this a delegated lock? */
4546 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4547 goto out;
8d0a8a9d 4548 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4549 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4550 status = -ENOMEM;
911d1aaf 4551 if (seqid == NULL)
9b073574 4552 goto out;
cd3758e3 4553 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4554 status = PTR_ERR(task);
4555 if (IS_ERR(task))
9b073574 4556 goto out;
a5d16a4d 4557 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4558 rpc_put_task(task);
9b073574 4559out:
536ff0f8 4560 request->fl_flags = fl_flags;
1da177e4
LT		 4561 return status;
4562}
4563
a5d16a4d
TM		 4564struct nfs4_lockdata {
4565 struct nfs_lock_args arg;
4566 struct nfs_lock_res res;
4567 struct nfs4_lock_state *lsp;
4568 struct nfs_open_context *ctx;
4569 struct file_lock fl;
26e976a8 4570 unsigned long timestamp;
a5d16a4d
TM		 4571 int rpc_status;
4572 int cancelled;
66179efe 4573 struct nfs_server *server;
a5d16a4d
TM		 4574};
4575
4576static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4577 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4578 gfp_t gfp_mask)
1da177e4 4579{
a5d16a4d
TM		 4580 struct nfs4_lockdata *p;
4581 struct inode *inode = lsp->ls_state->inode;
1da177e4 4582 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4583
8535b2be 4584 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4585 if (p == NULL)
4586 return NULL;
4587
4588 p->arg.fh = NFS_FH(inode);
4589 p->arg.fl = &p->fl;
8535b2be 4590 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4591 if (p->arg.open_seqid == NULL)
4592 goto out_free;
8535b2be 4593 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4594 if (p->arg.lock_seqid == NULL)
2f74c0a0 4595 goto out_free_seqid;
a5d16a4d 4596 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4597 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4598 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4599 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4600 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4601 p->lsp = lsp;
66179efe 4602 p->server = server;
a5d16a4d
TM		 4603 atomic_inc(&lsp->ls_count);
4604 p->ctx = get_nfs_open_context(ctx);
4605 memcpy(&p->fl, fl, sizeof(p->fl));
4606 return p;
2f74c0a0
TM		 4607out_free_seqid:
4608 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4609out_free:
4610 kfree(p);
4611 return NULL;
4612}
4613
4614static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4615{
4616 struct nfs4_lockdata *data = calldata;
4617 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4618
3110ff80 4619 dprintk("%s: begin!\n", __func__);
2f74c0a0 4620 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 4621 goto out_wait;
a5d16a4d
TM		 4622 /* Do we need to do an open_to_lock_owner? */
4623 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4624 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4625 goto out_release_lock_seqid;
8fe72bac 4626 }
a5d16a4d
TM		 4627 data->arg.open_stateid = &state->stateid;
4628 data->arg.new_lock_owner = 1;
c1d51931 4629 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4630 } else
4631 data->arg.new_lock_owner = 0;
26e976a8 4632 data->timestamp = jiffies;
035168ab
TM		 4633 if (nfs4_setup_sequence(data->server,
4634 &data->arg.seq_args,
2240a9e2 4635 &data->res.seq_res,
d9afbd1b 4636 task) == 0)
66179efe 4637 return;
2240a9e2
TM		 4638 nfs_release_seqid(data->arg.open_seqid);
4639out_release_lock_seqid:
4640 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 4641out_wait:
4642 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 4643 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4644}
4645
a5d16a4d
TM		 4646static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4647{
4648 struct nfs4_lockdata *data = calldata;
4649
3110ff80 4650 dprintk("%s: begin!\n", __func__);
a5d16a4d 4651
14516c3a
TM		 4652 if (!nfs4_sequence_done(task, &data->res.seq_res))
4653 return;
66179efe 4654
a5d16a4d 4655 data->rpc_status = task->tk_status;
a5d16a4d 4656 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4657 if (data->rpc_status == 0)
4658 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4659 else
4660 goto out;
4661 }
4662 if (data->rpc_status == 0) {
f597c537 4663 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4664 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4665 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4666 }
a5d16a4d 4667out:
3110ff80 4668 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4669}
4670
4671static void nfs4_lock_release(void *calldata)
4672{
4673 struct nfs4_lockdata *data = calldata;
4674
3110ff80 4675 dprintk("%s: begin!\n", __func__);
2f74c0a0 4676 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4677 if (data->cancelled != 0) {
4678 struct rpc_task *task;
4679 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4680 data->arg.lock_seqid);
4681 if (!IS_ERR(task))
bf294b41 4682 rpc_put_task_async(task);
3110ff80 4683 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4684 } else
4685 nfs_free_seqid(data->arg.lock_seqid);
4686 nfs4_put_lock_state(data->lsp);
4687 put_nfs_open_context(data->ctx);
4688 kfree(data);
3110ff80 4689 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4690}
4691
4692static const struct rpc_call_ops nfs4_lock_ops = {
4693 .rpc_call_prepare = nfs4_lock_prepare,
4694 .rpc_call_done = nfs4_lock_done,
4695 .rpc_release = nfs4_lock_release,
4696};
4697
2bee72a6
TM		 4698static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4699{
2bee72a6
TM		 4700 switch (error) {
4701 case -NFS4ERR_ADMIN_REVOKED:
4702 case -NFS4ERR_BAD_STATEID:
ecac799a 4703 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4704 if (new_lock_owner != 0 ||
795a88c9 4705 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4706 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4707 break;
4708 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4709 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4710 case -NFS4ERR_EXPIRED:
4711 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4712 };
4713}
4714
afe6c27c 4715static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4716{
4717 struct nfs4_lockdata *data;
4718 struct rpc_task *task;
5138fde0
TM		 4719 struct rpc_message msg = {
4720 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4721 .rpc_cred = state->owner->so_cred,
4722 };
c970aa85
TM		 4723 struct rpc_task_setup task_setup_data = {
4724 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4725 .rpc_message = &msg,
c970aa85 4726 .callback_ops = &nfs4_lock_ops,
101070ca 4727 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4728 .flags = RPC_TASK_ASYNC,
4729 };
a5d16a4d
TM		 4730 int ret;
4731
3110ff80 4732 dprintk("%s: begin!\n", __func__);
cd3758e3 4733 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4734 fl->fl_u.nfs4_fl.owner,
4735 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4736 if (data == NULL)
4737 return -ENOMEM;
4738 if (IS_SETLKW(cmd))
4739 data->arg.block = 1;
9d12b216 4740 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4741 msg.rpc_argp = &data->arg;
4742 msg.rpc_resp = &data->res;
c970aa85 4743 task_setup_data.callback_data = data;
8fe72bac
TM		 4744 if (recovery_type > NFS_LOCK_NEW) {
4745 if (recovery_type == NFS_LOCK_RECLAIM)
4746 data->arg.reclaim = NFS_LOCK_RECLAIM;
4747 nfs4_set_sequence_privileged(&data->arg.seq_args);
4748 }
c970aa85 4749 task = rpc_run_task(&task_setup_data);
7a1218a2 4750 if (IS_ERR(task))
a5d16a4d 4751 return PTR_ERR(task);
a5d16a4d
TM		 4752 ret = nfs4_wait_for_completion_rpc_task(task);
4753 if (ret == 0) {
4754 ret = data->rpc_status;
2bee72a6
TM		 4755 if (ret)
4756 nfs4_handle_setlk_error(data->server, data->lsp,
4757 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4758 } else
4759 data->cancelled = 1;
e6b3c4db 4760 rpc_put_task(task);
3110ff80 4761 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4762 return ret;
1da177e4
LT		 4763}
4764
4765static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4766{
202b50dc 4767 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4768 struct nfs4_exception exception = {
4769 .inode = state->inode,
4770 };
202b50dc
TM		 4771 int err;
4772
4773 do {
42a2d13e
TM		 4774 /* Cache the lock if possible... */
4775 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4776 return 0;
afe6c27c 4777 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4778 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4779 break;
4780 nfs4_handle_exception(server, err, &exception);
4781 } while (exception.retry);
4782 return err;
1da177e4
LT		 4783}
4784
4785static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4786{
202b50dc 4787 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4788 struct nfs4_exception exception = {
4789 .inode = state->inode,
4790 };
202b50dc
TM		 4791 int err;
4792
6bfc93ef
TM		 4793 err = nfs4_set_lock_state(state, request);
4794 if (err != 0)
4795 return err;
202b50dc 4796 do {
42a2d13e
TM		 4797 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4798 return 0;
afe6c27c 4799 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4800 switch (err) {
4801 default:
4802 goto out;
4803 case -NFS4ERR_GRACE:
4804 case -NFS4ERR_DELAY:
4805 nfs4_handle_exception(server, err, &exception);
4806 err = 0;
4807 }
202b50dc 4808 } while (exception.retry);
a9ed2e25 4809out:
202b50dc 4810 return err;
1da177e4
LT		 4811}
4812
f062eb6c 4813#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 4814/**
4815 * nfs41_check_expired_locks - possibly free a lock stateid
4816 *
4817 * @state: NFSv4 state for an inode
4818 *
4819 * Returns NFS_OK if recovery for this stateid is now finished.
4820 * Otherwise a negative NFS4ERR value is returned.
4821 */
b01dd1d8 4822static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4823{
eb64cf96 4824 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 4825 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4826 struct nfs_server *server = NFS_SERVER(state->inode);
4827
b01dd1d8 4828 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 4829 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 4830 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4831 if (status != NFS_OK) {
3e60ffdd
CL		 4832 /* Free the stateid unless the server
4833 * informs us the stateid is unrecognized. */
89af2739
CL		 4834 if (status != -NFS4ERR_BAD_STATEID)
4835 nfs41_free_stateid(server,
4836 &lsp->ls_stateid);
795a88c9 4837 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 4838 ret = status;
4839 }
4840 }
4841 };
4842
4843 return ret;
4844}
4845
4846static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4847{
4848 int status = NFS_OK;
4849
4850 if (test_bit(LK_STATE_IN_USE, &state->flags))
4851 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 4852 if (status != NFS_OK)
4853 status = nfs4_lock_expired(state, request);
4854 return status;
f062eb6c
BS		 4855}
4856#endif
4857
1da177e4
LT		 4858static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4859{
9a99af49 4860 struct nfs4_state_owner *sp = state->owner;
19e03c57 4861 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4862 unsigned char fl_flags = request->fl_flags;
9a99af49 4863 unsigned int seq;
8e469ebd 4864 int status = -ENOLCK;
1da177e4 4865
8e469ebd
TM		 4866 if ((fl_flags & FL_POSIX) &&
4867 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4868 goto out;
6bfc93ef 4869 /* Is this a delegated open? */
6bfc93ef
TM		 4870 status = nfs4_set_lock_state(state, request);
4871 if (status != 0)
4872 goto out;
01c3b861
TM		 4873 request->fl_flags |= FL_ACCESS;
4874 status = do_vfs_lock(request->fl_file, request);
4875 if (status < 0)
4876 goto out;
19e03c57 4877 down_read(&nfsi->rwsem);
01c3b861 4878 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4879 /* Yes: cache locks! */
01c3b861 4880 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4881 request->fl_flags = fl_flags & ~FL_SLEEP;
4882 status = do_vfs_lock(request->fl_file, request);
4883 goto out_unlock;
01c3b861 4884 }
9a99af49
TM		 4885 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
4886 up_read(&nfsi->rwsem);
afe6c27c 4887 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4888 if (status != 0)
9a99af49
TM		 4889 goto out;
4890 down_read(&nfsi->rwsem);
4891 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
4892 status = -NFS4ERR_DELAY;
01c3b861 4893 goto out_unlock;
9a99af49 4894 }
6bfc93ef 4895 /* Note: we always want to sleep here! */
01c3b861 4896 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4897 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 4898 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4899 "manager!\n", __func__);
01c3b861 4900out_unlock:
19e03c57 4901 up_read(&nfsi->rwsem);
01c3b861
TM		 4902out:
4903 request->fl_flags = fl_flags;
1da177e4
LT		 4904 return status;
4905}
4906
4907static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4908{
a1d0b5ee
TM		 4909 struct nfs4_exception exception = {
4910 .state = state,
05ffe24f 4911 .inode = state->inode,
a1d0b5ee 4912 };
1da177e4
LT		 4913 int err;
4914
4915 do {
965b5d67
TM		 4916 err = _nfs4_proc_setlk(state, cmd, request);
4917 if (err == -NFS4ERR_DENIED)
4918 err = -EAGAIN;
1da177e4 4919 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4920 err, &exception);
1da177e4
LT		 4921 } while (exception.retry);
4922 return err;
4923}
4924
4925static int
4926nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4927{
4928 struct nfs_open_context *ctx;
4929 struct nfs4_state *state;
4930 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4931 int status;
4932
4933 /* verify open state */
cd3758e3 4934 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4935 state = ctx->state;
4936
4937 if (request->fl_start < 0 || request->fl_end < 0)
4938 return -EINVAL;
4939
d953126a
TM		 4940 if (IS_GETLK(cmd)) {
4941 if (state != NULL)
4942 return nfs4_proc_getlk(state, F_GETLK, request);
4943 return 0;
4944 }
1da177e4
LT		 4945
4946 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4947 return -EINVAL;
4948
d953126a
TM		 4949 if (request->fl_type == F_UNLCK) {
4950 if (state != NULL)
4951 return nfs4_proc_unlck(state, cmd, request);
4952 return 0;
4953 }
1da177e4 4954
d953126a
TM		 4955 if (state == NULL)
4956 return -ENOLCK;
55725513
TM		 4957 /*
4958 * Don't rely on the VFS having checked the file open mode,
4959 * since it won't do this for flock() locks.
4960 */
f44106e2 4961 switch (request->fl_type) {
55725513
TM		 4962 case F_RDLCK:
4963 if (!(filp->f_mode & FMODE_READ))
4964 return -EBADF;
4965 break;
4966 case F_WRLCK:
4967 if (!(filp->f_mode & FMODE_WRITE))
4968 return -EBADF;
4969 }
4970
1da177e4
LT		 4971 do {
4972 status = nfs4_proc_setlk(state, cmd, request);
4973 if ((status != -EAGAIN) || IS_SETLK(cmd))
4974 break;
4975 timeout = nfs4_set_lock_task_retry(timeout);
4976 status = -ERESTARTSYS;
4977 if (signalled())
4978 break;
4979 } while(status < 0);
1da177e4
LT		 4980 return status;
4981}
4982
888e694c
TM		 4983int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4984{
4985 struct nfs_server *server = NFS_SERVER(state->inode);
4986 struct nfs4_exception exception = { };
4987 int err;
4988
4989 err = nfs4_set_lock_state(state, fl);
4990 if (err != 0)
4991 goto out;
4992 do {
afe6c27c 4993 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4994 switch (err) {
4995 default:
a030889a
WAA		 4996 printk(KERN_ERR "NFS: %s: unhandled error "
4997 "%d.\n", __func__, err);
d5122201 4998 case 0:
965b5d67 4999 case -ESTALE:
d5122201 5000 goto out;
d5122201 5001 case -NFS4ERR_STALE_CLIENTID:
965b5d67 5002 case -NFS4ERR_STALE_STATEID:
37380e42
TM		 5003 set_bit(NFS_DELEGATED_STATE, &state->flags);
5004 case -NFS4ERR_EXPIRED:
0400a6b0 5005 nfs4_schedule_lease_recovery(server->nfs_client);
37380e42 5006 err = -EAGAIN;
0400a6b0 5007 goto out;
74e7bb73
RL		 5008 case -NFS4ERR_BADSESSION:
5009 case -NFS4ERR_BADSLOT:
5010 case -NFS4ERR_BAD_HIGH_SLOT:
5011 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
5012 case -NFS4ERR_DEADSESSION:
37380e42 5013 set_bit(NFS_DELEGATED_STATE, &state->flags);
9f594791 5014 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
37380e42 5015 err = -EAGAIN;
d5122201 5016 goto out;
a1d0b5ee 5017 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 5018 case -NFS4ERR_ADMIN_REVOKED:
5019 case -NFS4ERR_BAD_STATEID:
5020 case -NFS4ERR_OPENMODE:
0400a6b0 5021 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 5022 err = 0;
5023 goto out;
5024 case -ENOMEM:
5025 case -NFS4ERR_DENIED:
5026 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
5027 err = 0;
5028 goto out;
d5122201 5029 }
37380e42 5030 set_bit(NFS_DELEGATED_STATE, &state->flags);
888e694c
TM		 5031 err = nfs4_handle_exception(server, err, &exception);
5032 } while (exception.retry);
5033out:
5034 return err;
5035}
6b3b5496 5036
cf470c3e
TM		 5037struct nfs_release_lockowner_data {
5038 struct nfs4_lock_state *lsp;
5ae67c4f 5039 struct nfs_server *server;
cf470c3e
TM		 5040 struct nfs_release_lockowner_args args;
5041};
5042
d3c7b7cc
TM		 5043static void nfs4_release_lockowner_release(void *calldata)
5044{
cf470c3e 5045 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5046 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5047 kfree(calldata);
5048}
5049
17280175 5050static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5051 .rpc_release = nfs4_release_lockowner_release,
5052};
5053
cf470c3e 5054int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 5055{
5056 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 5057 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5058 struct rpc_message msg = {
5059 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5060 };
5061
5062 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5063 return -EINVAL;
5064 data = kmalloc(sizeof(*data), GFP_NOFS);
5065 if (!data)
5066 return -ENOMEM;
5067 data->lsp = lsp;
5ae67c4f 5068 data->server = server;
cf470c3e
TM		 5069 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5070 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5071 data->args.lock_owner.s_dev = server->s_dev;
5072 msg.rpc_argp = &data->args;
5073 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5074 return 0;
d3c7b7cc
TM		 5075}
5076
aa1870af
BF		 5077#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5078
64c2ce8b
AK		 5079static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5080 const void *buf, size_t buflen,
5081 int flags, int type)
6b3b5496 5082{
64c2ce8b
AK		 5083 if (strcmp(key, "") != 0)
5084 return -EINVAL;
4b580ee3 5085
64c2ce8b 5086 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5087}
5088
64c2ce8b
AK		 5089static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5090 void *buf, size_t buflen, int type)
6b3b5496 5091{
64c2ce8b
AK		 5092 if (strcmp(key, "") != 0)
5093 return -EINVAL;
aa1870af 5094
64c2ce8b 5095 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5096}
5097
64c2ce8b
AK		 5098static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5099 size_t list_len, const char *name,
5100 size_t name_len, int type)
6b3b5496 5101{
64c2ce8b 5102 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5103
096455a2
BF		 5104 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5105 return 0;
64c2ce8b
AK		 5106
5107 if (list && len <= list_len)
5108 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5109 return len;
6b3b5496
BF		 5110}
5111
533eb461
AA		 5112/*
5113 * nfs_fhget will use either the mounted_on_fileid or the fileid
5114 */
69aaaae1
TM		 5115static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5116{
533eb461
AA		 5117 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5118 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5119 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5120 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5121 return;
5122
5123 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5124 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5125 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5126 fattr->nlink = 2;
5127}
5128
f05d147f
BS		 5129static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5130 const struct qstr *name,
5131 struct nfs4_fs_locations *fs_locations,
5132 struct page *page)
683b57b4
TM		 5133{
5134 struct nfs_server *server = NFS_SERVER(dir);
5135 u32 bitmask[2] = {
361e624f 5136 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5137 };
5138 struct nfs4_fs_locations_arg args = {
5139 .dir_fh = NFS_FH(dir),
c228fd3a 5140 .name = name,
683b57b4
TM		 5141 .page = page,
5142 .bitmask = bitmask,
5143 };
22958463
BH		 5144 struct nfs4_fs_locations_res res = {
5145 .fs_locations = fs_locations,
5146 };
683b57b4
TM		 5147 struct rpc_message msg = {
5148 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5149 .rpc_argp = &args,
22958463 5150 .rpc_resp = &res,
683b57b4
TM		 5151 };
5152 int status;
5153
3110ff80 5154 dprintk("%s: start\n", __func__);
533eb461
AA		 5155
5156 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5157 * is not supported */
5158 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5159 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5160 else
5161 bitmask[0] |= FATTR4_WORD0_FILEID;
5162
c228fd3a 5163 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5164 fs_locations->server = server;
830b8e33 5165 fs_locations->nlocations = 0;
f05d147f 5166 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5167 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5168 return status;
5169}
5170
f05d147f
BS		 5171int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5172 const struct qstr *name,
5173 struct nfs4_fs_locations *fs_locations,
5174 struct page *page)
db0a9593
BS		 5175{
5176 struct nfs4_exception exception = { };
5177 int err;
5178 do {
5179 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5180 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5181 &exception);
5182 } while (exception.retry);
5183 return err;
5184}
5185
5a5ea0d4
BS		 5186static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5187{
5188 int status;
5189 struct nfs4_secinfo_arg args = {
5190 .dir_fh = NFS_FH(dir),
5191 .name = name,
5192 };
5193 struct nfs4_secinfo_res res = {
5194 .flavors = flavors,
5195 };
5196 struct rpc_message msg = {
5197 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5198 .rpc_argp = &args,
5199 .rpc_resp = &res,
5200 };
5201
5202 dprintk("NFS call secinfo %s\n", name->name);
5203 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5204 dprintk("NFS reply secinfo: %d\n", status);
5205 return status;
5206}
5207
72de53ec
BS		 5208int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5209 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5210{
5211 struct nfs4_exception exception = { };
5212 int err;
5213 do {
5214 err = nfs4_handle_exception(NFS_SERVER(dir),
5215 _nfs4_proc_secinfo(dir, name, flavors),
5216 &exception);
5217 } while (exception.retry);
5218 return err;
5219}
5220
557134a3 5221#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5222/*
5223 * Check the exchange flags returned by the server for invalid flags, having
5224 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5225 * DS flags set.
5226 */
5227static int nfs4_check_cl_exchange_flags(u32 flags)
5228{
5229 if (flags & ~EXCHGID4_FLAG_MASK_R)
5230 goto out_inval;
5231 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5232 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5233 goto out_inval;
5234 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5235 goto out_inval;
5236 return NFS_OK;
5237out_inval:
5238 return -NFS4ERR_INVAL;
5239}
5240
78fe0f41 5241static bool
79d4e1f0
CL		 5242nfs41_same_server_scope(struct nfs41_server_scope *a,
5243 struct nfs41_server_scope *b)
78fe0f41
WAA		 5244{
5245 if (a->server_scope_sz == b->server_scope_sz &&
5246 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5247 return true;
5248
5249 return false;
5250}
5251
7c44f1ae
WAA		 5252/*
5253 * nfs4_proc_bind_conn_to_session()
5254 *
5255 * The 4.1 client currently uses the same TCP connection for the
5256 * fore and backchannel.
5257 */
2cf047c9 5258int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5259{
5260 int status;
5261 struct nfs41_bind_conn_to_session_res res;
5262 struct rpc_message msg = {
5263 .rpc_proc =
5264 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5265 .rpc_argp = clp,
5266 .rpc_resp = &res,
2cf047c9 5267 .rpc_cred = cred,
7c44f1ae
WAA		 5268 };
5269
5270 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5271
5272 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5273 if (unlikely(res.session == NULL)) {
5274 status = -ENOMEM;
5275 goto out;
5276 }
5277
5278 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5279 if (status == 0) {
5280 if (memcmp(res.session->sess_id.data,
5281 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5282 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5283 status = -EIO;
5284 goto out_session;
5285 }
5286 if (res.dir != NFS4_CDFS4_BOTH) {
5287 dprintk("NFS: %s: Unexpected direction from server\n",
5288 __func__);
5289 status = -EIO;
5290 goto out_session;
5291 }
5292 if (res.use_conn_in_rdma_mode) {
5293 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5294 __func__);
5295 status = -EIO;
5296 goto out_session;
5297 }
5298 }
5299out_session:
5300 kfree(res.session);
5301out:
5302 dprintk("<-- %s status= %d\n", __func__, status);
5303 return status;
5304}
5305
99fe60d0
BH		 5306/*
5307 * nfs4_proc_exchange_id()
5308 *
6bbb4ae8
CL		 5309 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5310 *
99fe60d0
BH		 5311 * Since the clientid has expired, all compounds using sessions
5312 * associated with the stale clientid will be returning
5313 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5314 * be in some phase of session reset.
5315 */
4d643d1d 5316int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5317{
5318 nfs4_verifier verifier;
5319 struct nfs41_exchange_id_args args = {
cd93710e 5320 .verifier = &verifier,
99fe60d0 5321 .client = clp,
357f54d6 5322 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5323 };
5324 struct nfs41_exchange_id_res res = {
32b01310 5325 0
99fe60d0
BH		 5326 };
5327 int status;
5328 struct rpc_message msg = {
5329 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5330 .rpc_argp = &args,
5331 .rpc_resp = &res,
5332 .rpc_cred = cred,
5333 };
99fe60d0 5334
f092075d 5335 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5336 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5337 sizeof(args.id));
6bbb4ae8
CL		 5338 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5339 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5340 args.id_len, args.id);
99fe60d0 5341
acdeb69d 5342 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5343 GFP_NOFS);
acdeb69d 5344 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5345 status = -ENOMEM;
5346 goto out;
5347 }
78fe0f41 5348
79d4e1f0 5349 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5350 GFP_NOFS);
177313f1 5351 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5352 status = -ENOMEM;
acdeb69d 5353 goto out_server_owner;
abe9a6d5 5354 }
78fe0f41 5355
bbafffd2 5356 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5357 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5358 status = -ENOMEM;
5359 goto out_server_scope;
5360 }
5361
1bd714f2 5362 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5363 if (status == 0)
32b01310 5364 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5365
acdeb69d 5366 if (status == 0) {
32b01310
TM		 5367 clp->cl_clientid = res.clientid;
5368 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5369 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5370 clp->cl_seqid = res.seqid;
5371
acdeb69d
CL		 5372 kfree(clp->cl_serverowner);
5373 clp->cl_serverowner = res.server_owner;
5374 res.server_owner = NULL;
78fe0f41 5375
7d2ed9ac 5376 /* use the most recent implementation id */
59155546
CL		 5377 kfree(clp->cl_implid);
5378 clp->cl_implid = res.impl_id;
7d2ed9ac 5379
177313f1 5380 if (clp->cl_serverscope != NULL &&
79d4e1f0 5381 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5382 res.server_scope)) {
5383 dprintk("%s: server_scope mismatch detected\n",
5384 __func__);
5385 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5386 kfree(clp->cl_serverscope);
5387 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5388 }
5389
177313f1 5390 if (clp->cl_serverscope == NULL) {
79d4e1f0 5391 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5392 goto out;
5393 }
32b01310
TM		 5394 } else
5395 kfree(res.impl_id);
7d2ed9ac 5396
acdeb69d
CL		 5397out_server_owner:
5398 kfree(res.server_owner);
7d2ed9ac 5399out_server_scope:
abe9a6d5
WAA		 5400 kfree(res.server_scope);
5401out:
177313f1 5402 if (clp->cl_implid != NULL)
6bbb4ae8 5403 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5404 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5405 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5406 clp->cl_implid->date.seconds,
5407 clp->cl_implid->date.nseconds);
6bbb4ae8 5408 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5409 return status;
5410}
5411
66245539
TM		 5412static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5413 struct rpc_cred *cred)
5414{
5415 struct rpc_message msg = {
5416 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5417 .rpc_argp = clp,
5418 .rpc_cred = cred,
5419 };
5420 int status;
5421
5422 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5423 if (status)
02c67525 5424 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5425 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5426 return status;
5427}
5428
5429static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5430 struct rpc_cred *cred)
5431{
5432 unsigned int loop;
5433 int ret;
5434
5435 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5436 ret = _nfs4_proc_destroy_clientid(clp, cred);
5437 switch (ret) {
5438 case -NFS4ERR_DELAY:
5439 case -NFS4ERR_CLIENTID_BUSY:
5440 ssleep(1);
5441 break;
5442 default:
5443 return ret;
5444 }
5445 }
5446 return 0;
5447}
5448
5449int nfs4_destroy_clientid(struct nfs_client *clp)
5450{
5451 struct rpc_cred *cred;
5452 int ret = 0;
5453
5454 if (clp->cl_mvops->minor_version < 1)
5455 goto out;
5456 if (clp->cl_exchange_flags == 0)
5457 goto out;
05f4c350
CL		 5458 if (clp->cl_preserve_clid)
5459 goto out;
66245539
TM		 5460 cred = nfs4_get_exchange_id_cred(clp);
5461 ret = nfs4_proc_destroy_clientid(clp, cred);
5462 if (cred)
5463 put_rpccred(cred);
5464 switch (ret) {
5465 case 0:
5466 case -NFS4ERR_STALE_CLIENTID:
5467 clp->cl_exchange_flags = 0;
5468 }
5469out:
5470 return ret;
5471}
5472
2050f0cc
AA		 5473struct nfs4_get_lease_time_data {
5474 struct nfs4_get_lease_time_args *args;
5475 struct nfs4_get_lease_time_res *res;
5476 struct nfs_client *clp;
5477};
5478
5479static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5480 void *calldata)
5481{
2050f0cc
AA		 5482 struct nfs4_get_lease_time_data *data =
5483 (struct nfs4_get_lease_time_data *)calldata;
5484
5485 dprintk("--> %s\n", __func__);
5486 /* just setup sequence, do not trigger session recovery
5487 since we're invoked within one */
d9afbd1b
TM		 5488 nfs41_setup_sequence(data->clp->cl_session,
5489 &data->args->la_seq_args,
5490 &data->res->lr_seq_res,
5491 task);
2050f0cc
AA		 5492 dprintk("<-- %s\n", __func__);
5493}
5494
5495/*
5496 * Called from nfs4_state_manager thread for session setup, so don't recover
5497 * from sequence operation or clientid errors.
5498 */
5499static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5500{
5501 struct nfs4_get_lease_time_data *data =
5502 (struct nfs4_get_lease_time_data *)calldata;
5503
5504 dprintk("--> %s\n", __func__);
14516c3a
TM		 5505 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5506 return;
2050f0cc
AA		 5507 switch (task->tk_status) {
5508 case -NFS4ERR_DELAY:
5509 case -NFS4ERR_GRACE:
5510 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5511 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5512 task->tk_status = 0;
a8a4ae3a
AA		 5513 /* fall through */
5514 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5515 rpc_restart_call_prepare(task);
2050f0cc
AA		 5516 return;
5517 }
2050f0cc
AA		 5518 dprintk("<-- %s\n", __func__);
5519}
5520
17280175 5521static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5522 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5523 .rpc_call_done = nfs4_get_lease_time_done,
5524};
5525
5526int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5527{
5528 struct rpc_task *task;
5529 struct nfs4_get_lease_time_args args;
5530 struct nfs4_get_lease_time_res res = {
5531 .lr_fsinfo = fsinfo,
5532 };
5533 struct nfs4_get_lease_time_data data = {
5534 .args = &args,
5535 .res = &res,
5536 .clp = clp,
5537 };
5538 struct rpc_message msg = {
5539 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5540 .rpc_argp = &args,
5541 .rpc_resp = &res,
5542 };
5543 struct rpc_task_setup task_setup = {
5544 .rpc_client = clp->cl_rpcclient,
5545 .rpc_message = &msg,
5546 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5547 .callback_data = &data,
5548 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5549 };
5550 int status;
5551
9d12b216 5552 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5553 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5554 dprintk("--> %s\n", __func__);
5555 task = rpc_run_task(&task_setup);
5556
5557 if (IS_ERR(task))
5558 status = PTR_ERR(task);
5559 else {
5560 status = task->tk_status;
5561 rpc_put_task(task);
5562 }
5563 dprintk("<-- %s return %d\n", __func__, status);
5564
5565 return status;
5566}
5567
fc931582
AA		 5568/*
5569 * Initialize the values to be used by the client in CREATE_SESSION
5570 * If nfs4_init_session set the fore channel request and response sizes,
5571 * use them.
5572 *
5573 * Set the back channel max_resp_sz_cached to zero to force the client to
5574 * always set csa_cachethis to FALSE because the current implementation
5575 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5576 */
5577static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5578{
5579 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5580 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5581 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5582
5583 if (mxrqst_sz == 0)
5584 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5585 if (mxresp_sz == 0)
5586 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5587 /* Fore channel attributes */
fc931582
AA		 5588 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5589 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5590 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5591 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5592
5593 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5594 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5595 __func__,
5596 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5597 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5598
5599 /* Back channel attributes */
fc931582
AA		 5600 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5601 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5602 args->bc_attrs.max_resp_sz_cached = 0;
5603 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5604 args->bc_attrs.max_reqs = 1;
5605
5606 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5607 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5608 __func__,
5609 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5610 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5611 args->bc_attrs.max_reqs);
5612}
5613
43c2e885 5614static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5615{
43c2e885
BF		 5616 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5617 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5618
43c2e885
BF		 5619 if (rcvd->max_resp_sz > sent->max_resp_sz)
5620 return -EINVAL;
5621 /*
5622 * Our requested max_ops is the minimum we need; we're not
5623 * prepared to break up compounds into smaller pieces than that.
5624 * So, no point even trying to continue if the server won't
5625 * cooperate:
5626 */
5627 if (rcvd->max_ops < sent->max_ops)
5628 return -EINVAL;
5629 if (rcvd->max_reqs == 0)
5630 return -EINVAL;
b4b9a0c1
VG		 5631 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5632 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5633 return 0;
8d35301d
AA		 5634}
5635
43c2e885
BF		 5636static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5637{
5638 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5639 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5640
43c2e885
BF		 5641 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5642 return -EINVAL;
5643 if (rcvd->max_resp_sz < sent->max_resp_sz)
5644 return -EINVAL;
5645 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5646 return -EINVAL;
5647 /* These would render the backchannel useless: */
b4b9a0c1 5648 if (rcvd->max_ops != sent->max_ops)
43c2e885 5649 return -EINVAL;
b4b9a0c1 5650 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5651 return -EINVAL;
5652 return 0;
5653}
8d35301d 5654
8d35301d
AA		 5655static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5656 struct nfs4_session *session)
5657{
43c2e885 5658 int ret;
8d35301d 5659
43c2e885
BF		 5660 ret = nfs4_verify_fore_channel_attrs(args, session);
5661 if (ret)
5662 return ret;
5663 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5664}
5665
848f5bda
TM		 5666static int _nfs4_proc_create_session(struct nfs_client *clp,
5667 struct rpc_cred *cred)
fc931582
AA		 5668{
5669 struct nfs4_session *session = clp->cl_session;
5670 struct nfs41_create_session_args args = {
5671 .client = clp,
5672 .cb_program = NFS4_CALLBACK,
5673 };
5674 struct nfs41_create_session_res res = {
5675 .client = clp,
5676 };
5677 struct rpc_message msg = {
5678 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5679 .rpc_argp = &args,
5680 .rpc_resp = &res,
848f5bda 5681 .rpc_cred = cred,
fc931582
AA		 5682 };
5683 int status;
5684
5685 nfs4_init_channel_attrs(&args);
0f91421e 5686 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5687
1bd714f2 5688 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5689
43095d39 5690 if (!status) {
8d35301d
AA		 5691 /* Verify the session's negotiated channel_attrs values */
5692 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5693 /* Increment the clientid slot sequence id */
5694 clp->cl_seqid++;
5695 }
5696
5697 return status;
5698}
5699
5700/*
5701 * Issues a CREATE_SESSION operation to the server.
5702 * It is the responsibility of the caller to verify the session is
5703 * expired before calling this routine.
5704 */
848f5bda 5705int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5706{
5707 int status;
5708 unsigned *ptr;
fc931582
AA		 5709 struct nfs4_session *session = clp->cl_session;
5710
5711 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5712
848f5bda 5713 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5714 if (status)
5715 goto out;
5716
aacd5537
AA		 5717 /* Init or reset the session slot tables */
5718 status = nfs4_setup_session_slot_tables(session);
5719 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5720 if (status)
5721 goto out;
5722
5723 ptr = (unsigned *)&session->sess_id.data[0];
5724 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5725 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5726out:
5727 dprintk("<-- %s\n", __func__);
5728 return status;
5729}
5730
0f3e66c6
AA		 5731/*
5732 * Issue the over-the-wire RPC DESTROY_SESSION.
5733 * The caller must serialize access to this routine.
5734 */
848f5bda
TM		 5735int nfs4_proc_destroy_session(struct nfs4_session *session,
5736 struct rpc_cred *cred)
0f3e66c6 5737{
848f5bda
TM		 5738 struct rpc_message msg = {
5739 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5740 .rpc_argp = session,
5741 .rpc_cred = cred,
5742 };
0f3e66c6 5743 int status = 0;
0f3e66c6
AA		 5744
5745 dprintk("--> nfs4_proc_destroy_session\n");
5746
5747 /* session is still being setup */
5748 if (session->clp->cl_cons_state != NFS_CS_READY)
5749 return status;
5750
1bd714f2 5751 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5752
5753 if (status)
08106ac7 5754 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5755 "Session has been destroyed regardless...\n", status);
5756
5757 dprintk("<-- nfs4_proc_destroy_session\n");
5758 return status;
5759}
5760
fc01cea9
AA		 5761/*
5762 * Renew the cl_session lease.
5763 */
d5f8d3fe
TM		 5764struct nfs4_sequence_data {
5765 struct nfs_client *clp;
5766 struct nfs4_sequence_args args;
5767 struct nfs4_sequence_res res;
5768};
5769
dc96aef9
AB		 5770static void nfs41_sequence_release(void *data)
5771{
d5f8d3fe
TM		 5772 struct nfs4_sequence_data *calldata = data;
5773 struct nfs_client *clp = calldata->clp;
dc96aef9 5774
7135840f
AB		 5775 if (atomic_read(&clp->cl_count) > 1)
5776 nfs4_schedule_state_renewal(clp);
5777 nfs_put_client(clp);
d5f8d3fe 5778 kfree(calldata);
dc96aef9
AB		 5779}
5780
aa5190d0
TM		 5781static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5782{
5783 switch(task->tk_status) {
5784 case -NFS4ERR_DELAY:
aa5190d0
TM		 5785 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5786 return -EAGAIN;
5787 default:
0400a6b0 5788 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5789 }
5790 return 0;
5791}
5792
dc96aef9 5793static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5794{
d5f8d3fe
TM		 5795 struct nfs4_sequence_data *calldata = data;
5796 struct nfs_client *clp = calldata->clp;
fc01cea9 5797
14516c3a
TM		 5798 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5799 return;
fc01cea9
AA		 5800
5801 if (task->tk_status < 0) {
5802 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5803 if (atomic_read(&clp->cl_count) == 1)
5804 goto out;
fc01cea9 5805
aa5190d0
TM		 5806 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5807 rpc_restart_call_prepare(task);
fc01cea9
AA		 5808 return;
5809 }
5810 }
fc01cea9 5811 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5812out:
fc01cea9
AA		 5813 dprintk("<-- %s\n", __func__);
5814}
5815
5816static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5817{
d5f8d3fe
TM		 5818 struct nfs4_sequence_data *calldata = data;
5819 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5820 struct nfs4_sequence_args *args;
5821 struct nfs4_sequence_res *res;
5822
fc01cea9
AA		 5823 args = task->tk_msg.rpc_argp;
5824 res = task->tk_msg.rpc_resp;
5825
d9afbd1b 5826 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 5827}
5828
5829static const struct rpc_call_ops nfs41_sequence_ops = {
5830 .rpc_call_done = nfs41_sequence_call_done,
5831 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5832 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5833};
5834
8fe72bac
TM		 5835static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
5836 struct rpc_cred *cred,
5837 bool is_privileged)
fc01cea9 5838{
d5f8d3fe 5839 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5840 struct rpc_message msg = {
5841 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5842 .rpc_cred = cred,
5843 };
71ac6da9
TM		 5844 struct rpc_task_setup task_setup_data = {
5845 .rpc_client = clp->cl_rpcclient,
5846 .rpc_message = &msg,
8fe72bac 5847 .callback_ops = &nfs41_sequence_ops,
71ac6da9
TM		 5848 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5849 };
fc01cea9 5850
7135840f 5851 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5852 return ERR_PTR(-EIO);
dfb4f309 5853 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5854 if (calldata == NULL) {
7135840f 5855 nfs_put_client(clp);
71ac6da9 5856 return ERR_PTR(-ENOMEM);
fc01cea9 5857 }
9d12b216 5858 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 5859 if (is_privileged)
5860 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 5861 msg.rpc_argp = &calldata->args;
5862 msg.rpc_resp = &calldata->res;
5863 calldata->clp = clp;
71ac6da9 5864 task_setup_data.callback_data = calldata;
fc01cea9 5865
71ac6da9
TM		 5866 return rpc_run_task(&task_setup_data);
5867}
5868
2f60ea6b 5869static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 5870{
5871 struct rpc_task *task;
5872 int ret = 0;
5873
2f60ea6b
TM		 5874 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5875 return 0;
8fe72bac 5876 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 5877 if (IS_ERR(task))
5878 ret = PTR_ERR(task);
5879 else
bf294b41 5880 rpc_put_task_async(task);
71ac6da9
TM		 5881 dprintk("<-- %s status=%d\n", __func__, ret);
5882 return ret;
5883}
5884
5885static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5886{
5887 struct rpc_task *task;
5888 int ret;
5889
8fe72bac 5890 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 5891 if (IS_ERR(task)) {
5892 ret = PTR_ERR(task);
5893 goto out;
5894 }
5895 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5896 if (!ret) {
5897 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5898
5899 if (task->tk_status == 0)
5900 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 5901 ret = task->tk_status;
b4410c2f 5902 }
71ac6da9
TM		 5903 rpc_put_task(task);
5904out:
5905 dprintk("<-- %s status=%d\n", __func__, ret);
5906 return ret;
fc01cea9
AA		 5907}
5908
fce5c838
RL		 5909struct nfs4_reclaim_complete_data {
5910 struct nfs_client *clp;
5911 struct nfs41_reclaim_complete_args arg;
5912 struct nfs41_reclaim_complete_res res;
5913};
5914
5915static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5916{
5917 struct nfs4_reclaim_complete_data *calldata = data;
5918
d9afbd1b
TM		 5919 nfs41_setup_sequence(calldata->clp->cl_session,
5920 &calldata->arg.seq_args,
5921 &calldata->res.seq_res,
5922 task);
fce5c838
RL		 5923}
5924
aa5190d0
TM		 5925static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5926{
5927 switch(task->tk_status) {
5928 case 0:
5929 case -NFS4ERR_COMPLETE_ALREADY:
5930 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5931 break;
5932 case -NFS4ERR_DELAY:
aa5190d0 5933 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 5934 /* fall through */
5935 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 5936 return -EAGAIN;
5937 default:
0400a6b0 5938 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5939 }
5940 return 0;
5941}
5942
fce5c838
RL		 5943static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5944{
5945 struct nfs4_reclaim_complete_data *calldata = data;
5946 struct nfs_client *clp = calldata->clp;
5947 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5948
5949 dprintk("--> %s\n", __func__);
14516c3a
TM		 5950 if (!nfs41_sequence_done(task, res))
5951 return;
fce5c838 5952
aa5190d0
TM		 5953 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5954 rpc_restart_call_prepare(task);
5955 return;
5956 }
fce5c838
RL		 5957 dprintk("<-- %s\n", __func__);
5958}
5959
5960static void nfs4_free_reclaim_complete_data(void *data)
5961{
5962 struct nfs4_reclaim_complete_data *calldata = data;
5963
5964 kfree(calldata);
5965}
5966
5967static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5968 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5969 .rpc_call_done = nfs4_reclaim_complete_done,
5970 .rpc_release = nfs4_free_reclaim_complete_data,
5971};
5972
5973/*
5974 * Issue a global reclaim complete.
5975 */
5976static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5977{
5978 struct nfs4_reclaim_complete_data *calldata;
5979 struct rpc_task *task;
5980 struct rpc_message msg = {
5981 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5982 };
5983 struct rpc_task_setup task_setup_data = {
5984 .rpc_client = clp->cl_rpcclient,
5985 .rpc_message = &msg,
5986 .callback_ops = &nfs4_reclaim_complete_call_ops,
5987 .flags = RPC_TASK_ASYNC,
5988 };
5989 int status = -ENOMEM;
5990
5991 dprintk("--> %s\n", __func__);
8535b2be 5992 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5993 if (calldata == NULL)
5994 goto out;
5995 calldata->clp = clp;
5996 calldata->arg.one_fs = 0;
fce5c838 5997
9d12b216 5998 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 5999 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6000 msg.rpc_argp = &calldata->arg;
6001 msg.rpc_resp = &calldata->res;
6002 task_setup_data.callback_data = calldata;
6003 task = rpc_run_task(&task_setup_data);
acf82b85 6004 if (IS_ERR(task)) {
fce5c838 6005 status = PTR_ERR(task);
acf82b85
DC		 6006 goto out;
6007 }
c34c32ea
AA		 6008 status = nfs4_wait_for_completion_rpc_task(task);
6009 if (status == 0)
6010 status = task->tk_status;
fce5c838 6011 rpc_put_task(task);
acf82b85 6012 return 0;
fce5c838
RL		 6013out:
6014 dprintk("<-- %s status=%d\n", __func__, status);
6015 return status;
6016}
b1f69b75
AA		 6017
6018static void
6019nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6020{
6021 struct nfs4_layoutget *lgp = calldata;
c31663d4 6022 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6023 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6024
6025 dprintk("--> %s\n", __func__);
c31663d4
FI		 6026 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6027 * right now covering the LAYOUTGET we are about to send.
6028 * However, that is not so catastrophic, and there seems
6029 * to be no way to prevent it completely.
6030 */
6ba7db34 6031 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6032 &lgp->res.seq_res, task))
b1f69b75 6033 return;
cf7d63f1
FI		 6034 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6035 NFS_I(lgp->args.inode)->layout,
6036 lgp->args.ctx->state)) {
6037 rpc_exit(task, NFS4_OK);
cf7d63f1 6038 }
b1f69b75
AA		 6039}
6040
6041static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6042{
6043 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6044 struct inode *inode = lgp->args.inode;
6045 struct nfs_server *server = NFS_SERVER(inode);
6046 struct pnfs_layout_hdr *lo;
6047 struct nfs4_state *state = NULL;
b1f69b75
AA		 6048
6049 dprintk("--> %s\n", __func__);
6050
6ba7db34 6051 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6052 goto out;
b1f69b75
AA		 6053
6054 switch (task->tk_status) {
6055 case 0:
ee314c2a 6056 goto out;
b1f69b75
AA		 6057 case -NFS4ERR_LAYOUTTRYLATER:
6058 case -NFS4ERR_RECALLCONFLICT:
6059 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6060 break;
6061 case -NFS4ERR_EXPIRED:
6062 case -NFS4ERR_BAD_STATEID:
6063 spin_lock(&inode->i_lock);
6064 lo = NFS_I(inode)->layout;
6065 if (!lo || list_empty(&lo->plh_segs)) {
6066 spin_unlock(&inode->i_lock);
6067 /* If the open stateid was bad, then recover it. */
6068 state = lgp->args.ctx->state;
6069 } else {
6070 LIST_HEAD(head);
6071
6072 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6073 spin_unlock(&inode->i_lock);
6074 /* Mark the bad layout state as invalid, then
6075 * retry using the open stateid. */
6076 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6077 }
6078 }
ee314c2a
TM		 6079 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6080 rpc_restart_call_prepare(task);
6081out:
b1f69b75
AA		 6082 dprintk("<-- %s\n", __func__);
6083}
6084
8554116e
IK		 6085static size_t max_response_pages(struct nfs_server *server)
6086{
6087 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6088 return nfs_page_array_len(0, max_resp_sz);
6089}
6090
6091static void nfs4_free_pages(struct page **pages, size_t size)
6092{
6093 int i;
6094
6095 if (!pages)
6096 return;
6097
6098 for (i = 0; i < size; i++) {
6099 if (!pages[i])
6100 break;
6101 __free_page(pages[i]);
6102 }
6103 kfree(pages);
6104}
6105
6106static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6107{
6108 struct page **pages;
6109 int i;
6110
6111 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6112 if (!pages) {
6113 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6114 return NULL;
6115 }
6116
6117 for (i = 0; i < size; i++) {
6118 pages[i] = alloc_page(gfp_flags);
6119 if (!pages[i]) {
6120 dprintk("%s: failed to allocate page\n", __func__);
6121 nfs4_free_pages(pages, size);
6122 return NULL;
6123 }
6124 }
6125
6126 return pages;
6127}
6128
b1f69b75
AA		 6129static void nfs4_layoutget_release(void *calldata)
6130{
6131 struct nfs4_layoutget *lgp = calldata;
8554116e
IK		 6132 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6133 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6134
6135 dprintk("--> %s\n", __func__);
8554116e 6136 nfs4_free_pages(lgp->args.layout.pages, max_pages);
b1f69b75
AA		 6137 put_nfs_open_context(lgp->args.ctx);
6138 kfree(calldata);
6139 dprintk("<-- %s\n", __func__);
6140}
6141
6142static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6143 .rpc_call_prepare = nfs4_layoutget_prepare,
6144 .rpc_call_done = nfs4_layoutget_done,
6145 .rpc_release = nfs4_layoutget_release,
6146};
6147
a0b0a6e3
TM		 6148struct pnfs_layout_segment *
6149nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75
AA		 6150{
6151 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
8554116e 6152 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6153 struct rpc_task *task;
6154 struct rpc_message msg = {
6155 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6156 .rpc_argp = &lgp->args,
6157 .rpc_resp = &lgp->res,
6158 };
6159 struct rpc_task_setup task_setup_data = {
6160 .rpc_client = server->client,
6161 .rpc_message = &msg,
6162 .callback_ops = &nfs4_layoutget_call_ops,
6163 .callback_data = lgp,
6164 .flags = RPC_TASK_ASYNC,
6165 };
a0b0a6e3 6166 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6167 int status = 0;
6168
6169 dprintk("--> %s\n", __func__);
6170
8554116e
IK		 6171 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6172 if (!lgp->args.layout.pages) {
6173 nfs4_layoutget_release(lgp);
a0b0a6e3 6174 return ERR_PTR(-ENOMEM);
8554116e
IK		 6175 }
6176 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6177
35124a09 6178 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6179 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6180 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
b1f69b75
AA		 6181 task = rpc_run_task(&task_setup_data);
6182 if (IS_ERR(task))
a0b0a6e3 6183 return ERR_CAST(task);
b1f69b75 6184 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6185 if (status == 0)
6186 status = task->tk_status;
6187 if (status == 0)
a0b0a6e3 6188 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6189 rpc_put_task(task);
6190 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6191 if (status)
6192 return ERR_PTR(status);
6193 return lseg;
b1f69b75
AA		 6194}
6195
cbe82603
BH		 6196static void
6197nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6198{
6199 struct nfs4_layoutreturn *lrp = calldata;
6200
6201 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6202 nfs41_setup_sequence(lrp->clp->cl_session,
6203 &lrp->args.seq_args,
6204 &lrp->res.seq_res,
6205 task);
cbe82603
BH		 6206}
6207
6208static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6209{
6210 struct nfs4_layoutreturn *lrp = calldata;
6211 struct nfs_server *server;
6212
6213 dprintk("--> %s\n", __func__);
6214
6ba7db34 6215 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6216 return;
6217
6218 server = NFS_SERVER(lrp->args.inode);
6219 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6220 rpc_restart_call_prepare(task);
cbe82603
BH		 6221 return;
6222 }
cbe82603
BH		 6223 dprintk("<-- %s\n", __func__);
6224}
6225
6226static void nfs4_layoutreturn_release(void *calldata)
6227{
6228 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6229 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6230
6231 dprintk("--> %s\n", __func__);
849b286f
TM		 6232 spin_lock(&lo->plh_inode->i_lock);
6233 if (lrp->res.lrs_present)
6234 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6235 lo->plh_block_lgets--;
6236 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6237 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6238 kfree(calldata);
6239 dprintk("<-- %s\n", __func__);
6240}
6241
6242static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6243 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6244 .rpc_call_done = nfs4_layoutreturn_done,
6245 .rpc_release = nfs4_layoutreturn_release,
6246};
6247
6248int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6249{
6250 struct rpc_task *task;
6251 struct rpc_message msg = {
6252 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6253 .rpc_argp = &lrp->args,
6254 .rpc_resp = &lrp->res,
6255 };
6256 struct rpc_task_setup task_setup_data = {
6257 .rpc_client = lrp->clp->cl_rpcclient,
6258 .rpc_message = &msg,
6259 .callback_ops = &nfs4_layoutreturn_call_ops,
6260 .callback_data = lrp,
6261 };
6262 int status;
6263
6264 dprintk("--> %s\n", __func__);
9d12b216 6265 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6266 task = rpc_run_task(&task_setup_data);
6267 if (IS_ERR(task))
6268 return PTR_ERR(task);
6269 status = task->tk_status;
6270 dprintk("<-- %s status=%d\n", __func__, status);
6271 rpc_put_task(task);
6272 return status;
6273}
6274
7f11d8d3
AA		 6275/*
6276 * Retrieve the list of Data Server devices from the MDS.
6277 */
6278static int _nfs4_getdevicelist(struct nfs_server *server,
6279 const struct nfs_fh *fh,
6280 struct pnfs_devicelist *devlist)
6281{
6282 struct nfs4_getdevicelist_args args = {
6283 .fh = fh,
6284 .layoutclass = server->pnfs_curr_ld->id,
6285 };
6286 struct nfs4_getdevicelist_res res = {
6287 .devlist = devlist,
6288 };
6289 struct rpc_message msg = {
6290 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6291 .rpc_argp = &args,
6292 .rpc_resp = &res,
6293 };
6294 int status;
6295
6296 dprintk("--> %s\n", __func__);
6297 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6298 &res.seq_res, 0);
6299 dprintk("<-- %s status=%d\n", __func__, status);
6300 return status;
6301}
6302
6303int nfs4_proc_getdevicelist(struct nfs_server *server,
6304 const struct nfs_fh *fh,
6305 struct pnfs_devicelist *devlist)
6306{
6307 struct nfs4_exception exception = { };
6308 int err;
6309
6310 do {
6311 err = nfs4_handle_exception(server,
6312 _nfs4_getdevicelist(server, fh, devlist),
6313 &exception);
6314 } while (exception.retry);
6315
6316 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6317 err, devlist->num_devs);
6318
6319 return err;
6320}
6321EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6322
b1f69b75
AA		 6323static int
6324_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6325{
6326 struct nfs4_getdeviceinfo_args args = {
6327 .pdev = pdev,
6328 };
6329 struct nfs4_getdeviceinfo_res res = {
6330 .pdev = pdev,
6331 };
6332 struct rpc_message msg = {
6333 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6334 .rpc_argp = &args,
6335 .rpc_resp = &res,
6336 };
6337 int status;
6338
6339 dprintk("--> %s\n", __func__);
7c513058 6340 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6341 dprintk("<-- %s status=%d\n", __func__, status);
6342
6343 return status;
6344}
6345
6346int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6347{
6348 struct nfs4_exception exception = { };
6349 int err;
6350
6351 do {
6352 err = nfs4_handle_exception(server,
6353 _nfs4_proc_getdeviceinfo(server, pdev),
6354 &exception);
6355 } while (exception.retry);
6356 return err;
6357}
6358EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6359
863a3c6c
AA		 6360static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6361{
6362 struct nfs4_layoutcommit_data *data = calldata;
6363 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6364 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6365
d9afbd1b
TM		 6366 nfs41_setup_sequence(session,
6367 &data->args.seq_args,
6368 &data->res.seq_res,
6369 task);
863a3c6c
AA		 6370}
6371
6372static void
6373nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6374{
6375 struct nfs4_layoutcommit_data *data = calldata;
6376 struct nfs_server *server = NFS_SERVER(data->args.inode);
6377
6ba7db34 6378 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6379 return;
6380
6381 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6382 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6383 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6384 case -NFS4ERR_BADLAYOUT: /* no layout */
6385 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6386 task->tk_status = 0;
e59d27e0
TM		 6387 break;
6388 case 0:
863a3c6c
AA		 6389 nfs_post_op_update_inode_force_wcc(data->args.inode,
6390 data->res.fattr);
e59d27e0
TM		 6391 break;
6392 default:
6393 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6394 rpc_restart_call_prepare(task);
6395 return;
6396 }
6397 }
863a3c6c
AA		 6398}
6399
6400static void nfs4_layoutcommit_release(void *calldata)
6401{
6402 struct nfs4_layoutcommit_data *data = calldata;
a9bae566 6403 struct pnfs_layout_segment *lseg, *tmp;
92407e75 6404 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
863a3c6c 6405
db29c089 6406 pnfs_cleanup_layoutcommit(data);
863a3c6c 6407 /* Matched by references in pnfs_set_layoutcommit */
a9bae566
PT		 6408 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6409 list_del_init(&lseg->pls_lc_list);
6410 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6411 &lseg->pls_flags))
9369a431 6412 pnfs_put_lseg(lseg);
a9bae566 6413 }
92407e75
PT		 6414
6415 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6416 smp_mb__after_clear_bit();
6417 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6418
863a3c6c
AA		 6419 put_rpccred(data->cred);
6420 kfree(data);
6421}
6422
6423static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6424 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6425 .rpc_call_done = nfs4_layoutcommit_done,
6426 .rpc_release = nfs4_layoutcommit_release,
6427};
6428
6429int
ef311537 6430nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6431{
6432 struct rpc_message msg = {
6433 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6434 .rpc_argp = &data->args,
6435 .rpc_resp = &data->res,
6436 .rpc_cred = data->cred,
6437 };
6438 struct rpc_task_setup task_setup_data = {
6439 .task = &data->task,
6440 .rpc_client = NFS_CLIENT(data->args.inode),
6441 .rpc_message = &msg,
6442 .callback_ops = &nfs4_layoutcommit_ops,
6443 .callback_data = data,
6444 .flags = RPC_TASK_ASYNC,
6445 };
6446 struct rpc_task *task;
6447 int status = 0;
6448
6449 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6450 "lbw: %llu inode %lu\n",
6451 data->task.tk_pid, sync,
6452 data->args.lastbytewritten,
6453 data->args.inode->i_ino);
6454
9d12b216 6455 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6456 task = rpc_run_task(&task_setup_data);
6457 if (IS_ERR(task))
6458 return PTR_ERR(task);
ef311537 6459 if (sync == false)
863a3c6c
AA		 6460 goto out;
6461 status = nfs4_wait_for_completion_rpc_task(task);
6462 if (status != 0)
6463 goto out;
6464 status = task->tk_status;
6465out:
6466 dprintk("%s: status %d\n", __func__, status);
6467 rpc_put_task(task);
6468 return status;
6469}
fca78d6d
BS		 6470
6471static int
6472_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6473 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6474{
6475 struct nfs41_secinfo_no_name_args args = {
6476 .style = SECINFO_STYLE_CURRENT_FH,
6477 };
6478 struct nfs4_secinfo_res res = {
6479 .flavors = flavors,
6480 };
6481 struct rpc_message msg = {
6482 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6483 .rpc_argp = &args,
6484 .rpc_resp = &res,
6485 };
6486 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6487}
6488
6489static int
6490nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6491 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6492{
6493 struct nfs4_exception exception = { };
6494 int err;
6495 do {
6496 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6497 switch (err) {
6498 case 0:
6499 case -NFS4ERR_WRONGSEC:
6500 case -NFS4ERR_NOTSUPP:
05e9cfb4 6501 goto out;
fca78d6d
BS		 6502 default:
6503 err = nfs4_handle_exception(server, err, &exception);
6504 }
6505 } while (exception.retry);
05e9cfb4 6506out:
fca78d6d
BS		 6507 return err;
6508}
6509
6510static int
6511nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6512 struct nfs_fsinfo *info)
6513{
6514 int err;
6515 struct page *page;
6516 rpc_authflavor_t flavor;
6517 struct nfs4_secinfo_flavors *flavors;
6518
6519 page = alloc_page(GFP_KERNEL);
6520 if (!page) {
6521 err = -ENOMEM;
6522 goto out;
6523 }
6524
6525 flavors = page_address(page);
6526 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6527
6528 /*
6529 * Fall back on "guess and check" method if
6530 * the server doesn't support SECINFO_NO_NAME
6531 */
6532 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6533 err = nfs4_find_root_sec(server, fhandle, info);
6534 goto out_freepage;
6535 }
6536 if (err)
6537 goto out_freepage;
6538
6539 flavor = nfs_find_best_sec(flavors);
6540 if (err == 0)
6541 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6542
6543out_freepage:
6544 put_page(page);
6545 if (err == -EACCES)
6546 return -EPERM;
6547out:
6548 return err;
6549}
1cab0652
BS		 6550
6551static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6552{
6553 int status;
6554 struct nfs41_test_stateid_args args = {
1cab0652 6555 .stateid = stateid,
7d974794
BS		 6556 };
6557 struct nfs41_test_stateid_res res;
6558 struct rpc_message msg = {
6559 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6560 .rpc_argp = &args,
6561 .rpc_resp = &res,
6562 };
1cab0652 6563
38527b15 6564 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6565 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6566 nfs4_set_sequence_privileged(&args.seq_args);
6567 status = nfs4_call_sync_sequence(server->client, server, &msg,
6568 &args.seq_args, &res.seq_res);
38527b15
CL		 6569 if (status != NFS_OK) {
6570 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6571 return status;
38527b15
CL		 6572 }
6573 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6574 return -res.status;
7d974794
BS		 6575}
6576
38527b15
CL		 6577/**
6578 * nfs41_test_stateid - perform a TEST_STATEID operation
6579 *
6580 * @server: server / transport on which to perform the operation
6581 * @stateid: state ID to test
6582 *
6583 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6584 * Otherwise a negative NFS4ERR value is returned if the operation
6585 * failed or the state ID is not currently valid.
6586 */
1cab0652 6587static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6588{
6589 struct nfs4_exception exception = { };
6590 int err;
6591 do {
377e507d
CL		 6592 err = _nfs41_test_stateid(server, stateid);
6593 if (err != -NFS4ERR_DELAY)
6594 break;
6595 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6596 } while (exception.retry);
6597 return err;
6598}
9aeda35f 6599
1cab0652 6600static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6601{
9aeda35f 6602 struct nfs41_free_stateid_args args = {
1cab0652 6603 .stateid = stateid,
9aeda35f
BS		 6604 };
6605 struct nfs41_free_stateid_res res;
6606 struct rpc_message msg = {
6607 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6608 .rpc_argp = &args,
6609 .rpc_resp = &res,
6610 };
38527b15 6611 int status;
9aeda35f 6612
38527b15 6613 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6614 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 6615 nfs4_set_sequence_privileged(&args.seq_args);
38527b15 6616 status = nfs4_call_sync_sequence(server->client, server, &msg,
8fe72bac 6617 &args.seq_args, &res.seq_res);
38527b15
CL		 6618 dprintk("NFS reply free_stateid: %d\n", status);
6619 return status;
9aeda35f
BS		 6620}
6621
38527b15
CL		 6622/**
6623 * nfs41_free_stateid - perform a FREE_STATEID operation
6624 *
6625 * @server: server / transport on which to perform the operation
6626 * @stateid: state ID to release
6627 *
6628 * Returns NFS_OK if the server freed "stateid". Otherwise a
6629 * negative NFS4ERR value is returned.
6630 */
1cab0652 6631static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6632{
6633 struct nfs4_exception exception = { };
6634 int err;
6635 do {
377e507d
CL		 6636 err = _nfs4_free_stateid(server, stateid);
6637 if (err != -NFS4ERR_DELAY)
6638 break;
6639 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6640 } while (exception.retry);
6641 return err;
6642}
36281caa
TM		 6643
6644static bool nfs41_match_stateid(const nfs4_stateid *s1,
6645 const nfs4_stateid *s2)
6646{
2d2f24ad 6647 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6648 return false;
6649
2d2f24ad 6650 if (s1->seqid == s2->seqid)
36281caa 6651 return true;
2d2f24ad 6652 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6653 return true;
6654
6655 return false;
6656}
6657
557134a3
AA		 6658#endif /* CONFIG_NFS_V4_1 */
6659
36281caa
TM		 6660static bool nfs4_match_stateid(const nfs4_stateid *s1,
6661 const nfs4_stateid *s2)
6662{
f597c537 6663 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6664}
6665
6666
17280175 6667static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6668 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6669 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6670 .recover_open = nfs4_open_reclaim,
6671 .recover_lock = nfs4_lock_reclaim,
591d71cb 6672 .establish_clid = nfs4_init_clientid,
90a16617 6673 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6674 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6675};
6676
591d71cb 6677#if defined(CONFIG_NFS_V4_1)
17280175 6678static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6679 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6680 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6681 .recover_open = nfs4_open_reclaim,
6682 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6683 .establish_clid = nfs41_init_clientid,
b4b82607 6684 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6685 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6686 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6687};
6688#endif /* CONFIG_NFS_V4_1 */
6689
17280175 6690static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6691 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6692 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6693 .recover_open = nfs4_open_expired,
6694 .recover_lock = nfs4_lock_expired,
6695 .establish_clid = nfs4_init_clientid,
90a16617 6696 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6697};
6698
6699#if defined(CONFIG_NFS_V4_1)
17280175 6700static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6701 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6702 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6703 .recover_open = nfs41_open_expired,
6704 .recover_lock = nfs41_lock_expired,
4d643d1d 6705 .establish_clid = nfs41_init_clientid,
b4b82607 6706 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6707};
591d71cb 6708#endif /* CONFIG_NFS_V4_1 */
1da177e4 6709
17280175 6710static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6711 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6712 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6713 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6714};
6715
6716#if defined(CONFIG_NFS_V4_1)
17280175 6717static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6718 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6719 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6720 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6721};
6722#endif
6723
97dc1359
TM		 6724static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6725 .minor_version = 0,
6726 .call_sync = _nfs4_call_sync,
36281caa 6727 .match_stateid = nfs4_match_stateid,
fca78d6d 6728 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6729 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6730 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6731 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6732};
6733
6734#if defined(CONFIG_NFS_V4_1)
6735static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6736 .minor_version = 1,
104287cd 6737 .call_sync = nfs4_call_sync_sequence,
36281caa 6738 .match_stateid = nfs41_match_stateid,
fca78d6d 6739 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6740 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6741 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6742 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6743};
6744#endif
6745
97dc1359
TM		 6746const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6747 [0] = &nfs_v4_0_minor_ops,
6748#if defined(CONFIG_NFS_V4_1)
6749 [1] = &nfs_v4_1_minor_ops,
6750#endif
6751};
6752
73a79706
BS		 6753const struct inode_operations nfs4_dir_inode_operations = {
6754 .create = nfs_create,
6755 .lookup = nfs_lookup,
6756 .atomic_open = nfs_atomic_open,
6757 .link = nfs_link,
6758 .unlink = nfs_unlink,
6759 .symlink = nfs_symlink,
6760 .mkdir = nfs_mkdir,
6761 .rmdir = nfs_rmdir,
6762 .mknod = nfs_mknod,
6763 .rename = nfs_rename,
6764 .permission = nfs_permission,
6765 .getattr = nfs_getattr,
6766 .setattr = nfs_setattr,
6767 .getxattr = generic_getxattr,
6768 .setxattr = generic_setxattr,
6769 .listxattr = generic_listxattr,
6770 .removexattr = generic_removexattr,
6771};
6772
92e1d5be 6773static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6774 .permission = nfs_permission,
6775 .getattr = nfs_getattr,
6776 .setattr = nfs_setattr,
64c2ce8b
AK		 6777 .getxattr = generic_getxattr,
6778 .setxattr = generic_setxattr,
6779 .listxattr = generic_listxattr,
6780 .removexattr = generic_removexattr,
6b3b5496
BF		 6781};
6782
509de811 6783const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6784 .version = 4, /* protocol version */
6785 .dentry_ops = &nfs4_dentry_operations,
6786 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6787 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6788 .file_ops = &nfs4_file_operations,
1da177e4 6789 .getroot = nfs4_proc_get_root,
281cad46 6790 .submount = nfs4_submount,
ff9099f2 6791 .try_mount = nfs4_try_mount,
1da177e4
LT		 6792 .getattr = nfs4_proc_getattr,
6793 .setattr = nfs4_proc_setattr,
6794 .lookup = nfs4_proc_lookup,
6795 .access = nfs4_proc_access,
6796 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6797 .create = nfs4_proc_create,
6798 .remove = nfs4_proc_remove,
6799 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6800 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6801 .unlink_done = nfs4_proc_unlink_done,
6802 .rename = nfs4_proc_rename,
d3d4152a 6803 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6804 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6805 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6806 .link = nfs4_proc_link,
6807 .symlink = nfs4_proc_symlink,
6808 .mkdir = nfs4_proc_mkdir,
6809 .rmdir = nfs4_proc_remove,
6810 .readdir = nfs4_proc_readdir,
6811 .mknod = nfs4_proc_mknod,
6812 .statfs = nfs4_proc_statfs,
6813 .fsinfo = nfs4_proc_fsinfo,
6814 .pathconf = nfs4_proc_pathconf,
e9326dca 6815 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6816 .decode_dirent = nfs4_decode_dirent,
6817 .read_setup = nfs4_proc_read_setup,
1abb5088 6818 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 6819 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6820 .read_done = nfs4_read_done,
1da177e4 6821 .write_setup = nfs4_proc_write_setup,
57208fa7 6822 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 6823 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6824 .write_done = nfs4_write_done,
1da177e4 6825 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 6826 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 6827 .commit_done = nfs4_commit_done,
1da177e4 6828 .lock = nfs4_proc_lock,
e50a1c2e 6829 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6830 .close_context = nfs4_close_context,
2b484297 6831 .open_context = nfs4_atomic_open,
011e2a7f 6832 .have_delegation = nfs4_have_delegation,
57ec14c5 6833 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 6834 .alloc_client = nfs4_alloc_client,
45a52a02 6835 .init_client = nfs4_init_client,
cdb7eced 6836 .free_client = nfs4_free_client,
1179acc6
BS		 6837 .create_server = nfs4_create_server,
6838 .clone_server = nfs_clone_server,
1da177e4
LT		 6839};
6840
64c2ce8b
AK		 6841static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6842 .prefix = XATTR_NAME_NFSV4_ACL,
6843 .list = nfs4_xattr_list_nfs4_acl,
6844 .get = nfs4_xattr_get_nfs4_acl,
6845 .set = nfs4_xattr_set_nfs4_acl,
6846};
6847
6848const struct xattr_handler *nfs4_xattr_handlers[] = {
6849 &nfs4_xattr_nfs4_acl_handler,
6850 NULL
6851};
6852
1da177e4
LT		 6853/*
6854 * Local variables:
6855 * c-basic-offset: 8
6856 * End:
6857 */
kernel source for telekom puls (alcatel/mediatek)