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NFSv4.1: Ping server when our session table limits are too high
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa
TM		 66#include "nfs4session.h"
67
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:
2c643488 336 case -EKEYEXPIRED:
65de872e
TM		 337 ret = nfs4_delay(server->client, &exception->timeout);
338 if (ret != 0)
339 break;
a8a4ae3a 340 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 341 case -NFS4ERR_OLD_STATEID:
342 exception->retry = 1;
b064eca2
TM		 343 break;
344 case -NFS4ERR_BADOWNER:
345 /* The following works around a Linux server bug! */
346 case -NFS4ERR_BADNAME:
347 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
348 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
349 exception->retry = 1;
350 printk(KERN_WARNING "NFS: v4 server %s "
351 "does not accept raw "
352 "uid/gids. "
353 "Reenabling the idmapper.\n",
354 server->nfs_client->cl_hostname);
355 }
65de872e
TM		 356 }
357 /* We failed to handle the error */
358 return nfs4_map_errors(ret);
0400a6b0 359wait_on_recovery:
a2c0b9e2
TM		 360 ret = nfs4_wait_clnt_recover(clp);
361 if (ret == 0)
362 exception->retry = 1;
363 return ret;
65de872e
TM		 364}
365
366
452e9352 367static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 368{
1da177e4
LT		 369 spin_lock(&clp->cl_lock);
370 if (time_before(clp->cl_last_renewal,timestamp))
371 clp->cl_last_renewal = timestamp;
372 spin_unlock(&clp->cl_lock);
373}
374
452e9352
TM		 375static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
376{
377 do_renew_lease(server->nfs_client, timestamp);
378}
379
cccef3b9
AA		 380#if defined(CONFIG_NFS_V4_1)
381
961a828d
TM		 382bool nfs4_set_task_privileged(struct rpc_task *task, void *dummy)
383{
384 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
385 return true;
e2c4ab3c
AA		 386}
387
d185a334 388static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 389{
e3725ec0 390 struct nfs4_session *session;
13615871 391 struct nfs4_slot_table *tbl;
c10e4498 392 bool send_new_highest_used_slotid = false;
13615871 393
dfb4f309 394 if (!res->sr_slot) {
13615871
AA		 395 /* just wake up the next guy waiting since
396 * we may have not consumed a slot after all */
691daf3b 397 dprintk("%s: No slot\n", __func__);
35dc1d74 398 return;
13615871 399 }
e3725ec0
TM		 400 tbl = res->sr_slot->table;
401 session = tbl->session;
ea028ac9 402
35dc1d74 403 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 404 /* Be nice to the server: try to ensure that the last transmitted
405 * value for highest_user_slotid <= target_highest_slotid
406 */
407 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
408 send_new_highest_used_slotid = true;
409
f4af6e2a 410 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 411
412 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
413 send_new_highest_used_slotid = false;
414 if (!nfs4_session_draining(session)) {
415 if (rpc_wake_up_first(&tbl->slot_tbl_waitq,
416 nfs4_set_task_privileged, NULL) != NULL)
417 send_new_highest_used_slotid = false;
418 }
35dc1d74 419 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 420 res->sr_slot = NULL;
c10e4498
TM		 421 if (send_new_highest_used_slotid)
422 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 423}
424
14516c3a 425static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 426{
e3725ec0 427 struct nfs4_session *session;
933602e3 428 struct nfs4_slot *slot;
b0df806c 429 unsigned long timestamp;
14516c3a 430 struct nfs_client *clp;
b0df806c
AA		 431
432 /*
433 * sr_status remains 1 if an RPC level error occurred. The server
434 * may or may not have processed the sequence operation..
435 * Proceed as if the server received and processed the sequence
436 * operation.
437 */
438 if (res->sr_status == 1)
439 res->sr_status = NFS_OK;
440
468f8613
BS		 441 /* don't increment the sequence number if the task wasn't sent */
442 if (!RPC_WAS_SENT(task))
b0df806c
AA		 443 goto out;
444
933602e3 445 slot = res->sr_slot;
e3725ec0 446 session = slot->table->session;
933602e3 447
691daf3b 448 /* Check the SEQUENCE operation status */
14516c3a
TM		 449 switch (res->sr_status) {
450 case 0:
b0df806c 451 /* Update the slot's sequence and clientid lease timer */
933602e3
TM		 452 ++slot->seq_nr;
453 timestamp = slot->renewal_time;
e3725ec0 454 clp = session->clp;
452e9352 455 do_renew_lease(clp, timestamp);
0629e370 456 /* Check sequence flags */
b4410c2f
TM		 457 if (res->sr_status_flags != 0)
458 nfs4_schedule_lease_recovery(clp);
464ee9f9 459 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a
TM		 460 break;
461 case -NFS4ERR_DELAY:
462 /* The server detected a resend of the RPC call and
463 * returned NFS4ERR_DELAY as per Section 2.10.6.2
464 * of RFC5661.
465 */
df2fabff 466 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 467 __func__,
df2fabff 468 slot->slot_nr,
933602e3 469 slot->seq_nr);
14516c3a
TM		 470 goto out_retry;
471 default:
472 /* Just update the slot sequence no. */
933602e3 473 ++slot->seq_nr;
b0df806c
AA		 474 }
475out:
476 /* The session may be reset by one of the error handlers. */
477 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 478 nfs41_sequence_free_slot(res);
14516c3a
TM		 479 return 1;
480out_retry:
d05dd4e9 481 if (!rpc_restart_call(task))
14516c3a
TM		 482 goto out;
483 rpc_delay(task, NFS4_POLL_RETRY_MAX);
484 return 0;
b0df806c
AA		 485}
486
14516c3a
TM		 487static int nfs4_sequence_done(struct rpc_task *task,
488 struct nfs4_sequence_res *res)
df896455 489{
e3725ec0 490 if (res->sr_slot == NULL)
14516c3a
TM		 491 return 1;
492 return nfs41_sequence_done(task, res);
df896455
TM		 493}
494
9d12b216
TM		 495static void nfs41_init_sequence(struct nfs4_sequence_args *args,
496 struct nfs4_sequence_res *res, int cache_reply)
497{
2b2fa717 498 args->sa_slot = NULL;
9d12b216
TM		 499 args->sa_cache_this = 0;
500 if (cache_reply)
501 args->sa_cache_this = 1;
9d12b216
TM		 502 res->sr_slot = NULL;
503}
504
dc70d7b3 505int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 506 struct nfs4_sequence_args *args,
507 struct nfs4_sequence_res *res,
ce5039c1
AA		 508 struct rpc_task *task)
509{
fbcd4abc
AA		 510 struct nfs4_slot *slot;
511 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 512
513 dprintk("--> %s\n", __func__);
ce5039c1 514 /* slot already allocated? */
dfb4f309 515 if (res->sr_slot != NULL)
ce5039c1
AA		 516 return 0;
517
fbcd4abc
AA		 518 tbl = &session->fc_slot_table;
519
69d206b5
TM		 520 task->tk_timeout = 0;
521
fbcd4abc 522 spin_lock(&tbl->slot_tbl_lock);
a2118c33 523 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
5601a00d 524 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
0b1c8fc4 525 /* The state manager will wait until the slot table is empty */
05f0d236 526 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
b069d94a 527 spin_unlock(&tbl->slot_tbl_lock);
0b1c8fc4 528 dprintk("%s session is draining\n", __func__);
05f0d236 529 return -EAGAIN;
b069d94a
AA		 530 }
531
689cf5c1
AB		 532 if (!rpc_queue_empty(&tbl->slot_tbl_waitq) &&
533 !rpc_task_has_priority(task, RPC_PRIORITY_PRIVILEGED)) {
534 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
535 spin_unlock(&tbl->slot_tbl_lock);
536 dprintk("%s enforce FIFO order\n", __func__);
537 return -EAGAIN;
538 }
539
2dc03b7f 540 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 541 if (IS_ERR(slot)) {
542 /* If out of memory, try again in 1/4 second */
543 if (slot == ERR_PTR(-ENOMEM))
544 task->tk_timeout = HZ >> 2;
fbcd4abc
AA		 545 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
546 spin_unlock(&tbl->slot_tbl_lock);
547 dprintk("<-- %s: no free slots\n", __func__);
548 return -EAGAIN;
549 }
550 spin_unlock(&tbl->slot_tbl_lock);
551
689cf5c1 552 rpc_task_set_priority(task, RPC_PRIORITY_NORMAL);
2b2fa717
TM		 553
554 args->sa_slot = slot;
fbcd4abc 555
2dc03b7f
TM		 556 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
557 slot->slot_nr, slot->seq_nr);
fbcd4abc 558
dfb4f309 559 res->sr_slot = slot;
2a6e26cd 560 res->sr_status_flags = 0;
fbcd4abc
AA		 561 /*
562 * sr_status is only set in decode_sequence, and so will remain
563 * set to 1 if an rpc level failure occurs.
564 */
565 res->sr_status = 1;
ce5039c1
AA		 566 return 0;
567}
dc70d7b3 568EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 569
035168ab 570int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 571 struct nfs4_sequence_args *args,
572 struct nfs4_sequence_res *res,
ce5039c1
AA		 573 struct rpc_task *task)
574{
035168ab 575 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 576 int ret = 0;
577
9d12b216 578 if (session == NULL)
035168ab 579 goto out;
035168ab 580
df2fabff 581 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 582 __func__, session->clp, session, res->sr_slot ?
df2fabff 583 res->sr_slot->slot_nr : -1);
ce5039c1 584
9d12b216 585 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 586out:
587 dprintk("<-- %s status=%d\n", __func__, ret);
588 return ret;
589}
590
591struct nfs41_call_sync_data {
035168ab 592 const struct nfs_server *seq_server;
ce5039c1
AA		 593 struct nfs4_sequence_args *seq_args;
594 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 595};
596
597static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
598{
599 struct nfs41_call_sync_data *data = calldata;
600
035168ab
TM		 601 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
602
603 if (nfs4_setup_sequence(data->seq_server, data->seq_args,
9d12b216 604 data->seq_res, task))
ce5039c1
AA		 605 return;
606 rpc_call_start(task);
607}
608
b257957e
AB		 609static void nfs41_call_priv_sync_prepare(struct rpc_task *task, void *calldata)
610{
611 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
612 nfs41_call_sync_prepare(task, calldata);
613}
614
69ab40c4
AA		 615static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
616{
617 struct nfs41_call_sync_data *data = calldata;
618
14516c3a 619 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 620}
621
17280175 622static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 623 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 624 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 625};
626
17280175 627static const struct rpc_call_ops nfs41_call_priv_sync_ops = {
b257957e
AB		 628 .rpc_call_prepare = nfs41_call_priv_sync_prepare,
629 .rpc_call_done = nfs41_call_sync_done,
630};
631
7c513058
BS		 632static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
633 struct nfs_server *server,
ce5039c1
AA		 634 struct rpc_message *msg,
635 struct nfs4_sequence_args *args,
636 struct nfs4_sequence_res *res,
b257957e 637 int privileged)
ce5039c1
AA		 638{
639 int ret;
640 struct rpc_task *task;
641 struct nfs41_call_sync_data data = {
035168ab 642 .seq_server = server,
ce5039c1
AA		 643 .seq_args = args,
644 .seq_res = res,
ce5039c1
AA		 645 };
646 struct rpc_task_setup task_setup = {
7c513058 647 .rpc_client = clnt,
ce5039c1
AA		 648 .rpc_message = msg,
649 .callback_ops = &nfs41_call_sync_ops,
650 .callback_data = &data
651 };
652
b257957e
AB		 653 if (privileged)
654 task_setup.callback_ops = &nfs41_call_priv_sync_ops;
ce5039c1
AA		 655 task = rpc_run_task(&task_setup);
656 if (IS_ERR(task))
657 ret = PTR_ERR(task);
658 else {
659 ret = task->tk_status;
660 rpc_put_task(task);
661 }
662 return ret;
663}
664
7c513058
BS		 665int _nfs4_call_sync_session(struct rpc_clnt *clnt,
666 struct nfs_server *server,
cccef3b9
AA		 667 struct rpc_message *msg,
668 struct nfs4_sequence_args *args,
669 struct nfs4_sequence_res *res,
670 int cache_reply)
671{
9d12b216
TM		 672 nfs41_init_sequence(args, res, cache_reply);
673 return nfs4_call_sync_sequence(clnt, server, msg, args, res, 0);
cccef3b9
AA		 674}
675
df896455 676#else
9d12b216
TM		 677static inline
678void nfs41_init_sequence(struct nfs4_sequence_args *args,
679 struct nfs4_sequence_res *res, int cache_reply)
680{
681}
682
14516c3a
TM		 683static int nfs4_sequence_done(struct rpc_task *task,
684 struct nfs4_sequence_res *res)
df896455 685{
14516c3a 686 return 1;
df896455 687}
cccef3b9
AA		 688#endif /* CONFIG_NFS_V4_1 */
689
7c513058
BS		 690int _nfs4_call_sync(struct rpc_clnt *clnt,
691 struct nfs_server *server,
cccef3b9
AA		 692 struct rpc_message *msg,
693 struct nfs4_sequence_args *args,
694 struct nfs4_sequence_res *res,
695 int cache_reply)
696{
9d12b216 697 nfs41_init_sequence(args, res, cache_reply);
7c513058 698 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 699}
700
e73b83f2 701static inline
7c513058
BS		 702int nfs4_call_sync(struct rpc_clnt *clnt,
703 struct nfs_server *server,
e73b83f2
BS		 704 struct rpc_message *msg,
705 struct nfs4_sequence_args *args,
706 struct nfs4_sequence_res *res,
707 int cache_reply)
708{
7c513058
BS		 709 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
710 args, res, cache_reply);
e73b83f2 711}
cccef3b9 712
38478b24 713static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 714{
38478b24 715 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 716
38478b24 717 spin_lock(&dir->i_lock);
359d7d1c 718 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 719 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 720 nfs_force_lookup_revalidate(dir);
a9a4a87a 721 dir->i_version = cinfo->after;
38478b24 722 spin_unlock(&dir->i_lock);
1da177e4
LT		 723}
724
e56e0b78 725struct nfs4_opendata {
c6d00e63 726 struct kref kref;
e56e0b78
TM		 727 struct nfs_openargs o_arg;
728 struct nfs_openres o_res;
cdd4e68b
TM		 729 struct nfs_open_confirmargs c_arg;
730 struct nfs_open_confirmres c_res;
6926afd1
TM		 731 struct nfs4_string owner_name;
732 struct nfs4_string group_name;
e56e0b78 733 struct nfs_fattr f_attr;
e56e0b78 734 struct dentry *dir;
82a2c1b7 735 struct dentry *dentry;
e56e0b78 736 struct nfs4_state_owner *owner;
aac00a8d 737 struct nfs4_state *state;
e56e0b78 738 struct iattr attrs;
26e976a8 739 unsigned long timestamp;
3e309914 740 unsigned int rpc_done : 1;
24ac23ab
TM		 741 int rpc_status;
742 int cancelled;
e56e0b78
TM		 743};
744
2ced46c2
TM		 745
746static void nfs4_init_opendata_res(struct nfs4_opendata *p)
747{
748 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 749 p->o_res.seqid = p->o_arg.seqid;
750 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 751 p->o_res.server = p->o_arg.server;
5f657530 752 p->o_res.access_request = p->o_arg.access;
2ced46c2 753 nfs_fattr_init(&p->f_attr);
6926afd1 754 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 755}
756
82a2c1b7 757static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 758 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 759 const struct iattr *attrs,
760 gfp_t gfp_mask)
e56e0b78 761{
82a2c1b7 762 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 763 struct inode *dir = parent->d_inode;
764 struct nfs_server *server = NFS_SERVER(dir);
765 struct nfs4_opendata *p;
766
8535b2be 767 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 768 if (p == NULL)
769 goto err;
8535b2be 770 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 771 if (p->o_arg.seqid == NULL)
772 goto err_free;
82a2c1b7
AV		 773 nfs_sb_active(dentry->d_sb);
774 p->dentry = dget(dentry);
e56e0b78
TM		 775 p->dir = parent;
776 p->owner = sp;
777 atomic_inc(&sp->so_count);
778 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 779 p->o_arg.open_flags = flags;
780 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 781 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
782 * will return permission denied for all bits until close */
783 if (!(flags & O_EXCL)) {
784 /* ask server to check for all possible rights as results
785 * are cached */
786 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
787 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 788 }
7539bbab 789 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 790 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
791 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 792 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 793 p->o_arg.server = server;
794 p->o_arg.bitmask = server->attr_bitmask;
1549210f 795 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
e56e0b78 796 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
536e43d1 797 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 798 __be32 verf[2];
d77d76ff 799
e56e0b78
TM		 800 p->o_arg.u.attrs = &p->attrs;
801 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 802
803 verf[0] = jiffies;
804 verf[1] = current->pid;
805 memcpy(p->o_arg.u.verifier.data, verf,
806 sizeof(p->o_arg.u.verifier.data));
e56e0b78 807 }
cdd4e68b
TM		 808 p->c_arg.fh = &p->o_res.fh;
809 p->c_arg.stateid = &p->o_res.stateid;
810 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 811 nfs4_init_opendata_res(p);
c6d00e63 812 kref_init(&p->kref);
e56e0b78
TM		 813 return p;
814err_free:
815 kfree(p);
816err:
817 dput(parent);
818 return NULL;
819}
820
c6d00e63 821static void nfs4_opendata_free(struct kref *kref)
e56e0b78 822{
c6d00e63
TM		 823 struct nfs4_opendata *p = container_of(kref,
824 struct nfs4_opendata, kref);
82a2c1b7 825 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 826
827 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 828 if (p->state != NULL)
829 nfs4_put_open_state(p->state);
c6d00e63
TM		 830 nfs4_put_state_owner(p->owner);
831 dput(p->dir);
82a2c1b7
AV		 832 dput(p->dentry);
833 nfs_sb_deactive(sb);
6926afd1 834 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 835 kfree(p);
836}
837
838static void nfs4_opendata_put(struct nfs4_opendata *p)
839{
840 if (p != NULL)
841 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 842}
843
06f814a3
TM		 844static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
845{
06f814a3
TM		 846 int ret;
847
06f814a3 848 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 849 return ret;
850}
851
dc0b027d 852static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 853{
854 int ret = 0;
dc0b027d 855
536e43d1 856 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 857 goto out;
858 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 859 case FMODE_READ:
88069f77
TM		 860 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
861 && state->n_rdonly != 0;
6ee41268
TM		 862 break;
863 case FMODE_WRITE:
88069f77
TM		 864 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
865 && state->n_wronly != 0;
6ee41268
TM		 866 break;
867 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 868 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
869 && state->n_rdwr != 0;
6ee41268 870 }
dc0b027d 871out:
6ee41268
TM		 872 return ret;
873}
874
dc0b027d 875static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 876{
652f89f6
TM		 877 if (delegation == NULL)
878 return 0;
dc0b027d 879 if ((delegation->type & fmode) != fmode)
aac00a8d 880 return 0;
15c831bf 881 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 882 return 0;
b7391f44 883 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 884 return 1;
885}
886
dc0b027d 887static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 888{
dc0b027d 889 switch (fmode) {
e7616923
TM		 890 case FMODE_WRITE:
891 state->n_wronly++;
892 break;
893 case FMODE_READ:
894 state->n_rdonly++;
895 break;
896 case FMODE_READ|FMODE_WRITE:
897 state->n_rdwr++;
898 }
dc0b027d 899 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 900}
901
dc0b027d 902static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 903{
904 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 905 nfs4_stateid_copy(&state->stateid, stateid);
906 nfs4_stateid_copy(&state->open_stateid, stateid);
dc0b027d 907 switch (fmode) {
003707c7
TM		 908 case FMODE_READ:
909 set_bit(NFS_O_RDONLY_STATE, &state->flags);
910 break;
911 case FMODE_WRITE:
912 set_bit(NFS_O_WRONLY_STATE, &state->flags);
913 break;
914 case FMODE_READ|FMODE_WRITE:
915 set_bit(NFS_O_RDWR_STATE, &state->flags);
916 }
e7616923
TM		 917}
918
dc0b027d 919static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 920{
8bda4e4c 921 write_seqlock(&state->seqlock);
dc0b027d 922 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 923 write_sequnlock(&state->seqlock);
003707c7
TM		 924}
925
dc0b027d 926static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 927{
8bda4e4c
TM		 928 /*
929 * Protect the call to nfs4_state_set_mode_locked and
930 * serialise the stateid update
931 */
932 write_seqlock(&state->seqlock);
003707c7 933 if (deleg_stateid != NULL) {
f597c537 934 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 935 set_bit(NFS_DELEGATED_STATE, &state->flags);
936 }
937 if (open_stateid != NULL)
dc0b027d 938 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 939 write_sequnlock(&state->seqlock);
940 spin_lock(&state->owner->so_lock);
dc0b027d 941 update_open_stateflags(state, fmode);
ec073428 942 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 943}
944
dc0b027d 945static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 946{
947 struct nfs_inode *nfsi = NFS_I(state->inode);
948 struct nfs_delegation *deleg_cur;
949 int ret = 0;
950
dc0b027d 951 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 952
953 rcu_read_lock();
954 deleg_cur = rcu_dereference(nfsi->delegation);
955 if (deleg_cur == NULL)
956 goto no_delegation;
957
958 spin_lock(&deleg_cur->lock);
959 if (nfsi->delegation != deleg_cur ||
dc0b027d 960 (deleg_cur->type & fmode) != fmode)
34310430
TM		 961 goto no_delegation_unlock;
962
963 if (delegation == NULL)
964 delegation = &deleg_cur->stateid;
f597c537 965 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 966 goto no_delegation_unlock;
967
b7391f44 968 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 969 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 970 ret = 1;
971no_delegation_unlock:
972 spin_unlock(&deleg_cur->lock);
973no_delegation:
974 rcu_read_unlock();
975
976 if (!ret && open_stateid != NULL) {
dc0b027d 977 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 978 ret = 1;
979 }
980
981 return ret;
982}
983
984
dc0b027d 985static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 986{
987 struct nfs_delegation *delegation;
988
989 rcu_read_lock();
990 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 991 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 992 rcu_read_unlock();
993 return;
994 }
995 rcu_read_unlock();
57ec14c5 996 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 997}
998
6ee41268 999static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1000{
1001 struct nfs4_state *state = opendata->state;
1002 struct nfs_inode *nfsi = NFS_I(state->inode);
1003 struct nfs_delegation *delegation;
536e43d1 1004 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1005 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1006 nfs4_stateid stateid;
1007 int ret = -EAGAIN;
1008
aac00a8d 1009 for (;;) {
dc0b027d 1010 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1011 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1012 if (can_open_cached(state, fmode, open_mode)) {
1013 update_open_stateflags(state, fmode);
6ee41268 1014 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1015 goto out_return_state;
1016 }
1017 spin_unlock(&state->owner->so_lock);
1018 }
34310430
TM		 1019 rcu_read_lock();
1020 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1021 if (!can_open_delegated(delegation, fmode)) {
34310430 1022 rcu_read_unlock();
aac00a8d 1023 break;
34310430 1024 }
aac00a8d 1025 /* Save the delegation */
f597c537 1026 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1027 rcu_read_unlock();
af22f94a 1028 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1029 if (ret != 0)
1030 goto out;
1031 ret = -EAGAIN;
34310430
TM		 1032
1033 /* Try to update the stateid using the delegation */
dc0b027d 1034 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1035 goto out_return_state;
aac00a8d 1036 }
aac00a8d
TM		 1037out:
1038 return ERR_PTR(ret);
1039out_return_state:
1040 atomic_inc(&state->count);
1041 return state;
1042}
1043
e23008ec
AA		 1044static void
1045nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1046{
1047 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1048 struct nfs_delegation *delegation;
1049 int delegation_flags = 0;
1050
1051 rcu_read_lock();
1052 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1053 if (delegation)
1054 delegation_flags = delegation->flags;
1055 rcu_read_unlock();
1056 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1057 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1058 "returning a delegation for "
1059 "OPEN(CLAIM_DELEGATE_CUR)\n",
1060 clp->cl_hostname);
1061 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1062 nfs_inode_set_delegation(state->inode,
1063 data->owner->so_cred,
1064 &data->o_res);
1065 else
1066 nfs_inode_reclaim_delegation(state->inode,
1067 data->owner->so_cred,
1068 &data->o_res);
1069}
1070
1071/*
1072 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1073 * and update the nfs4_state.
1074 */
1075static struct nfs4_state *
1076_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1077{
1078 struct inode *inode = data->state->inode;
1079 struct nfs4_state *state = data->state;
1080 int ret;
1081
1082 if (!data->rpc_done) {
1083 ret = data->rpc_status;
1084 goto err;
1085 }
1086
1087 ret = -ESTALE;
1088 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1089 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1090 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1091 goto err;
1092
1093 ret = -ENOMEM;
1094 state = nfs4_get_open_state(inode, data->owner);
1095 if (state == NULL)
1096 goto err;
1097
1098 ret = nfs_refresh_inode(inode, &data->f_attr);
1099 if (ret)
1100 goto err;
1101
1102 if (data->o_res.delegation_type != 0)
1103 nfs4_opendata_check_deleg(data, state);
1104 update_open_stateid(state, &data->o_res.stateid, NULL,
1105 data->o_arg.fmode);
1106
1107 return state;
1108err:
1109 return ERR_PTR(ret);
1110
1111}
1112
1113static struct nfs4_state *
1114_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1115{
1116 struct inode *inode;
1117 struct nfs4_state *state = NULL;
1b370bc2 1118 int ret;
24ac23ab 1119
aac00a8d 1120 if (!data->rpc_done) {
6ee41268 1121 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1122 goto out;
1123 }
1124
1b370bc2 1125 ret = -EAGAIN;
24ac23ab 1126 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1127 goto err;
24ac23ab 1128 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1129 ret = PTR_ERR(inode);
03f28e3a 1130 if (IS_ERR(inode))
1b370bc2
TM		 1131 goto err;
1132 ret = -ENOMEM;
24ac23ab
TM		 1133 state = nfs4_get_open_state(inode, data->owner);
1134 if (state == NULL)
1b370bc2 1135 goto err_put_inode;
e23008ec
AA		 1136 if (data->o_res.delegation_type != 0)
1137 nfs4_opendata_check_deleg(data, state);
34310430 1138 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1139 data->o_arg.fmode);
24ac23ab 1140 iput(inode);
aac00a8d 1141out:
24ac23ab 1142 return state;
1b370bc2
TM		 1143err_put_inode:
1144 iput(inode);
1145err:
1146 return ERR_PTR(ret);
24ac23ab
TM		 1147}
1148
e23008ec
AA		 1149static struct nfs4_state *
1150nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1151{
1152 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1153 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1154 return _nfs4_opendata_to_nfs4_state(data);
1155}
1156
864472e9
TM		 1157static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1158{
1159 struct nfs_inode *nfsi = NFS_I(state->inode);
1160 struct nfs_open_context *ctx;
1161
1162 spin_lock(&state->inode->i_lock);
1163 list_for_each_entry(ctx, &nfsi->open_files, list) {
1164 if (ctx->state != state)
1165 continue;
1166 get_nfs_open_context(ctx);
1167 spin_unlock(&state->inode->i_lock);
1168 return ctx;
1169 }
1170 spin_unlock(&state->inode->i_lock);
1171 return ERR_PTR(-ENOENT);
1172}
1173
6f220ed5
TM		 1174static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1175{
1176 struct nfs4_opendata *opendata;
1177
3d4ff43d 1178 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1179 if (opendata == NULL)
1180 return ERR_PTR(-ENOMEM);
1181 opendata->state = state;
1182 atomic_inc(&state->count);
1183 return opendata;
1184}
1185
dc0b027d 1186static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1187{
2ced46c2 1188 struct nfs4_state *newstate;
864472e9
TM		 1189 int ret;
1190
dc0b027d
TM		 1191 opendata->o_arg.open_flags = 0;
1192 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1193 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1194 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1195 nfs4_init_opendata_res(opendata);
b257957e 1196 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1197 if (ret != 0)
1198 return ret;
2ced46c2 1199 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1200 if (IS_ERR(newstate))
1201 return PTR_ERR(newstate);
643168c2 1202 nfs4_close_state(newstate, fmode);
2ced46c2 1203 *res = newstate;
864472e9
TM		 1204 return 0;
1205}
1206
1207static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1208{
864472e9 1209 struct nfs4_state *newstate;
864472e9
TM		 1210 int ret;
1211
1212 /* memory barrier prior to reading state->n_* */
2ced46c2 1213 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1214 smp_rmb();
1215 if (state->n_rdwr != 0) {
b0ed9dbc 1216 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1217 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1218 if (ret != 0)
1219 return ret;
2ced46c2
TM		 1220 if (newstate != state)
1221 return -ESTALE;
864472e9
TM		 1222 }
1223 if (state->n_wronly != 0) {
b0ed9dbc 1224 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1225 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1226 if (ret != 0)
1227 return ret;
2ced46c2
TM		 1228 if (newstate != state)
1229 return -ESTALE;
864472e9
TM		 1230 }
1231 if (state->n_rdonly != 0) {
b0ed9dbc 1232 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1233 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1234 if (ret != 0)
1235 return ret;
2ced46c2
TM		 1236 if (newstate != state)
1237 return -ESTALE;
864472e9 1238 }
1ac7e2fd
TM		 1239 /*
1240 * We may have performed cached opens for all three recoveries.
1241 * Check if we need to update the current stateid.
1242 */
1243 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1244 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1245 write_seqlock(&state->seqlock);
1ac7e2fd 1246 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1247 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1248 write_sequnlock(&state->seqlock);
1ac7e2fd 1249 }
864472e9
TM		 1250 return 0;
1251}
1252
1da177e4
LT		 1253/*
1254 * OPEN_RECLAIM:
1255 * reclaim state on the server after a reboot.
1da177e4 1256 */
539cd03a 1257static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1258{
1ac7e2fd 1259 struct nfs_delegation *delegation;
864472e9 1260 struct nfs4_opendata *opendata;
dc0b027d 1261 fmode_t delegation_type = 0;
1da177e4
LT		 1262 int status;
1263
6f220ed5
TM		 1264 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1265 if (IS_ERR(opendata))
1266 return PTR_ERR(opendata);
864472e9
TM		 1267 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1268 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1269 rcu_read_lock();
1270 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1271 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1272 delegation_type = delegation->type;
1ac7e2fd 1273 rcu_read_unlock();
864472e9
TM		 1274 opendata->o_arg.u.delegation_type = delegation_type;
1275 status = nfs4_open_recover(opendata, state);
c6d00e63 1276 nfs4_opendata_put(opendata);
1da177e4
LT		 1277 return status;
1278}
1279
539cd03a 1280static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1281{
1282 struct nfs_server *server = NFS_SERVER(state->inode);
1283 struct nfs4_exception exception = { };
1284 int err;
1285 do {
539cd03a 1286 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1287 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1288 break;
1289 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1290 } while (exception.retry);
1291 return err;
1292}
1293
864472e9
TM		 1294static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1295{
1296 struct nfs_open_context *ctx;
1297 int ret;
1298
1299 ctx = nfs4_state_find_open_context(state);
1300 if (IS_ERR(ctx))
1301 return PTR_ERR(ctx);
539cd03a 1302 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1303 put_nfs_open_context(ctx);
1304 return ret;
1305}
1306
13437e12 1307static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1308{
e56e0b78 1309 struct nfs4_opendata *opendata;
864472e9 1310 int ret;
1da177e4 1311
6f220ed5
TM		 1312 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1313 if (IS_ERR(opendata))
1314 return PTR_ERR(opendata);
e56e0b78 1315 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
f597c537 1316 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
864472e9 1317 ret = nfs4_open_recover(opendata, state);
c6d00e63 1318 nfs4_opendata_put(opendata);
864472e9 1319 return ret;
1da177e4
LT		 1320}
1321
13437e12 1322int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1323{
1324 struct nfs4_exception exception = { };
539cd03a 1325 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1326 int err;
1327 do {
13437e12 1328 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1329 switch (err) {
1330 case 0:
965b5d67
TM		 1331 case -ENOENT:
1332 case -ESTALE:
1333 goto out;
bcfa49f6
RL		 1334 case -NFS4ERR_BADSESSION:
1335 case -NFS4ERR_BADSLOT:
1336 case -NFS4ERR_BAD_HIGH_SLOT:
1337 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1338 case -NFS4ERR_DEADSESSION:
9f594791 1339 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
bcfa49f6 1340 goto out;
1da177e4
LT		 1341 case -NFS4ERR_STALE_CLIENTID:
1342 case -NFS4ERR_STALE_STATEID:
1343 case -NFS4ERR_EXPIRED:
1344 /* Don't recall a delegation if it was lost */
0400a6b0 1345 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1346 goto out;
1347 case -ERESTARTSYS:
1348 /*
1349 * The show must go on: exit, but mark the
1350 * stateid as needing recovery.
1351 */
a1d0b5ee 1352 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 1353 case -NFS4ERR_ADMIN_REVOKED:
1354 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 1355 nfs_inode_find_state_and_recover(state->inode,
1356 stateid);
0400a6b0 1357 nfs4_schedule_stateid_recovery(server, state);
168667c4
TM		 1358 case -EKEYEXPIRED:
1359 /*
1360 * User RPCSEC_GSS context has expired.
1361 * We cannot recover this stateid now, so
1362 * skip it and allow recovery thread to
1363 * proceed.
1364 */
965b5d67
TM		 1365 case -ENOMEM:
1366 err = 0;
1367 goto out;
1da177e4
LT		 1368 }
1369 err = nfs4_handle_exception(server, err, &exception);
1370 } while (exception.retry);
965b5d67 1371out:
1da177e4
LT		 1372 return err;
1373}
1374
cdd4e68b
TM		 1375static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1376{
1377 struct nfs4_opendata *data = calldata;
1378
1379 data->rpc_status = task->tk_status;
26e976a8 1380 if (data->rpc_status == 0) {
f597c537 1381 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1382 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1383 renew_lease(data->o_res.server, data->timestamp);
3e309914 1384 data->rpc_done = 1;
26e976a8 1385 }
cdd4e68b
TM		 1386}
1387
1388static void nfs4_open_confirm_release(void *calldata)
1389{
1390 struct nfs4_opendata *data = calldata;
1391 struct nfs4_state *state = NULL;
1392
1393 /* If this request hasn't been cancelled, do nothing */
1394 if (data->cancelled == 0)
1395 goto out_free;
1396 /* In case of error, no cleanup! */
3e309914 1397 if (!data->rpc_done)
cdd4e68b 1398 goto out_free;
cdd4e68b 1399 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1400 if (!IS_ERR(state))
643168c2 1401 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1402out_free:
c6d00e63 1403 nfs4_opendata_put(data);
cdd4e68b
TM		 1404}
1405
1406static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1407 .rpc_call_done = nfs4_open_confirm_done,
1408 .rpc_release = nfs4_open_confirm_release,
1409};
1410
1411/*
1412 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1413 */
1414static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1415{
1416 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1417 struct rpc_task *task;
5138fde0
TM		 1418 struct rpc_message msg = {
1419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1420 .rpc_argp = &data->c_arg,
1421 .rpc_resp = &data->c_res,
1422 .rpc_cred = data->owner->so_cred,
1423 };
c970aa85
TM		 1424 struct rpc_task_setup task_setup_data = {
1425 .rpc_client = server->client,
5138fde0 1426 .rpc_message = &msg,
c970aa85
TM		 1427 .callback_ops = &nfs4_open_confirm_ops,
1428 .callback_data = data,
101070ca 1429 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1430 .flags = RPC_TASK_ASYNC,
1431 };
1da177e4
LT		 1432 int status;
1433
c6d00e63 1434 kref_get(&data->kref);
3e309914
TM		 1435 data->rpc_done = 0;
1436 data->rpc_status = 0;
5138fde0 1437 data->timestamp = jiffies;
c970aa85 1438 task = rpc_run_task(&task_setup_data);
7a1218a2 1439 if (IS_ERR(task))
cdd4e68b 1440 return PTR_ERR(task);
cdd4e68b
TM		 1441 status = nfs4_wait_for_completion_rpc_task(task);
1442 if (status != 0) {
1443 data->cancelled = 1;
1444 smp_wmb();
1445 } else
1446 status = data->rpc_status;
e6b3c4db 1447 rpc_put_task(task);
1da177e4
LT		 1448 return status;
1449}
1450
24ac23ab 1451static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1452{
24ac23ab
TM		 1453 struct nfs4_opendata *data = calldata;
1454 struct nfs4_state_owner *sp = data->owner;
5138fde0 1455
24ac23ab
TM		 1456 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1457 return;
aac00a8d
TM		 1458 /*
1459 * Check if we still need to send an OPEN call, or if we can use
1460 * a delegation instead.
1461 */
1462 if (data->state != NULL) {
1463 struct nfs_delegation *delegation;
1464
dc0b027d 1465 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1466 goto out_no_action;
aac00a8d
TM		 1467 rcu_read_lock();
1468 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1469 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1470 can_open_delegated(delegation, data->o_arg.fmode))
1471 goto unlock_no_action;
aac00a8d
TM		 1472 rcu_read_unlock();
1473 }
95b72eb0 1474 /* Update client id. */
1f0e890d 1475 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1476 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1477 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
e23008ec 1478 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
6f220ed5
TM		 1479 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1480 }
26e976a8 1481 data->timestamp = jiffies;
035168ab 1482 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1483 &data->o_arg.seq_args,
2240a9e2
TM		 1484 &data->o_res.seq_res,
1485 task) != 0)
1486 nfs_release_seqid(data->o_arg.seqid);
1487 else
1488 rpc_call_start(task);
6ee41268 1489 return;
652f89f6
TM		 1490unlock_no_action:
1491 rcu_read_unlock();
6ee41268
TM		 1492out_no_action:
1493 task->tk_action = NULL;
1494
24ac23ab 1495}
1da177e4 1496
b257957e
AB		 1497static void nfs4_recover_open_prepare(struct rpc_task *task, void *calldata)
1498{
1499 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
1500 nfs4_open_prepare(task, calldata);
1501}
1502
24ac23ab
TM		 1503static void nfs4_open_done(struct rpc_task *task, void *calldata)
1504{
1505 struct nfs4_opendata *data = calldata;
1da177e4 1506
24ac23ab 1507 data->rpc_status = task->tk_status;
d898528c 1508
14516c3a
TM		 1509 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1510 return;
d898528c 1511
24ac23ab 1512 if (task->tk_status == 0) {
807d66d8
TM		 1513 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1514 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1515 case S_IFREG:
1516 break;
1517 case S_IFLNK:
24ac23ab 1518 data->rpc_status = -ELOOP;
6f926b5b
TM		 1519 break;
1520 case S_IFDIR:
24ac23ab 1521 data->rpc_status = -EISDIR;
6f926b5b
TM		 1522 break;
1523 default:
24ac23ab 1524 data->rpc_status = -ENOTDIR;
807d66d8 1525 }
6f926b5b 1526 }
26e976a8 1527 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1528 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1529 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1530 }
3e309914 1531 data->rpc_done = 1;
24ac23ab 1532}
6f926b5b 1533
24ac23ab
TM		 1534static void nfs4_open_release(void *calldata)
1535{
1536 struct nfs4_opendata *data = calldata;
1537 struct nfs4_state *state = NULL;
1538
1539 /* If this request hasn't been cancelled, do nothing */
1540 if (data->cancelled == 0)
1541 goto out_free;
1542 /* In case of error, no cleanup! */
3e309914 1543 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1544 goto out_free;
1545 /* In case we need an open_confirm, no cleanup! */
1546 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1547 goto out_free;
24ac23ab 1548 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1549 if (!IS_ERR(state))
643168c2 1550 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1551out_free:
c6d00e63 1552 nfs4_opendata_put(data);
24ac23ab
TM		 1553}
1554
1555static const struct rpc_call_ops nfs4_open_ops = {
1556 .rpc_call_prepare = nfs4_open_prepare,
1557 .rpc_call_done = nfs4_open_done,
1558 .rpc_release = nfs4_open_release,
1559};
1560
b257957e
AB		 1561static const struct rpc_call_ops nfs4_recover_open_ops = {
1562 .rpc_call_prepare = nfs4_recover_open_prepare,
1563 .rpc_call_done = nfs4_open_done,
1564 .rpc_release = nfs4_open_release,
1565};
1566
1567static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1568{
1569 struct inode *dir = data->dir->d_inode;
1570 struct nfs_server *server = NFS_SERVER(dir);
1571 struct nfs_openargs *o_arg = &data->o_arg;
1572 struct nfs_openres *o_res = &data->o_res;
1573 struct rpc_task *task;
5138fde0
TM		 1574 struct rpc_message msg = {
1575 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1576 .rpc_argp = o_arg,
1577 .rpc_resp = o_res,
1578 .rpc_cred = data->owner->so_cred,
1579 };
c970aa85
TM		 1580 struct rpc_task_setup task_setup_data = {
1581 .rpc_client = server->client,
5138fde0 1582 .rpc_message = &msg,
c970aa85
TM		 1583 .callback_ops = &nfs4_open_ops,
1584 .callback_data = data,
101070ca 1585 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1586 .flags = RPC_TASK_ASYNC,
1587 };
24ac23ab
TM		 1588 int status;
1589
9d12b216 1590 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1591 kref_get(&data->kref);
3e309914
TM		 1592 data->rpc_done = 0;
1593 data->rpc_status = 0;
2ced46c2 1594 data->cancelled = 0;
b257957e
AB		 1595 if (isrecover)
1596 task_setup_data.callback_ops = &nfs4_recover_open_ops;
c970aa85 1597 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1598 if (IS_ERR(task))
1599 return PTR_ERR(task);
1600 status = nfs4_wait_for_completion_rpc_task(task);
1601 if (status != 0) {
1602 data->cancelled = 1;
1603 smp_wmb();
1604 } else
1605 status = data->rpc_status;
1606 rpc_put_task(task);
1607
1608 return status;
1609}
1610
1611static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1612{
1613 struct inode *dir = data->dir->d_inode;
1614 struct nfs_openres *o_res = &data->o_res;
1615 int status;
1616
1617 status = nfs4_run_open_task(data, 1);
1618 if (status != 0 || !data->rpc_done)
1619 return status;
1620
6926afd1
TM		 1621 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1622
b257957e
AB		 1623 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1624 status = _nfs4_proc_open_confirm(data);
1625 if (status != 0)
1626 return status;
1627 }
1628
1629 return status;
1630}
1631
6168f62c
WAA		 1632static int nfs4_opendata_access(struct rpc_cred *cred,
1633 struct nfs4_opendata *opendata,
1634 struct nfs4_state *state, fmode_t fmode)
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
WAA		 1645 /* don't check MAY_WRITE - a newly created file may not have
1646 * write mode bits, but POSIX allows the creating process to write */
6168f62c
WAA		 1647 if (fmode & FMODE_READ)
1648 mask |= MAY_READ;
6168f62c
WAA		 1649 if (fmode & FMODE_EXEC)
1650 mask |= MAY_EXEC;
1651
1652 cache.cred = cred;
1653 cache.jiffies = jiffies;
1654 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1655 nfs_access_add_cache(state->inode, &cache);
1656
bbd3a8ee 1657 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1658 return 0;
1659
1660 /* even though OPEN succeeded, access is denied. Close the file */
1661 nfs4_close_state(state, fmode);
998f40b5 1662 return -EACCES;
6168f62c
WAA		 1663}
1664
b257957e
AB		 1665/*
1666 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1667 */
1668static int _nfs4_proc_open(struct nfs4_opendata *data)
1669{
1670 struct inode *dir = data->dir->d_inode;
1671 struct nfs_server *server = NFS_SERVER(dir);
1672 struct nfs_openargs *o_arg = &data->o_arg;
1673 struct nfs_openres *o_res = &data->o_res;
1674 int status;
1675
1676 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1677 if (!data->rpc_done)
1678 return status;
1679 if (status != 0) {
1680 if (status == -NFS4ERR_BADNAME &&
1681 !(o_arg->open_flags & O_CREAT))
1682 return -ENOENT;
24ac23ab 1683 return status;
08ef7bd3 1684 }
24ac23ab 1685
6926afd1
TM		 1686 nfs_fattr_map_and_free_names(server, &data->f_attr);
1687
90ff0c54 1688 if (o_arg->open_flags & O_CREAT)
56ae19f3 1689 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1690 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1691 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1692 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1693 status = _nfs4_proc_open_confirm(data);
1da177e4 1694 if (status != 0)
24ac23ab 1695 return status;
1da177e4
LT		 1696 }
1697 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1698 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1699 return 0;
1da177e4
LT		 1700}
1701
d83217c1
AA		 1702static int nfs4_recover_expired_lease(struct nfs_server *server)
1703{
1704 return nfs4_client_recover_expired_lease(server->nfs_client);
1705}
1706
1da177e4
LT		 1707/*
1708 * OPEN_EXPIRED:
1709 * reclaim state on the server after a network partition.
1710 * Assumes caller holds the appropriate lock
1711 */
539cd03a 1712static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1713{
e56e0b78 1714 struct nfs4_opendata *opendata;
864472e9 1715 int ret;
1da177e4 1716
6f220ed5
TM		 1717 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1718 if (IS_ERR(opendata))
1719 return PTR_ERR(opendata);
864472e9 1720 ret = nfs4_open_recover(opendata, state);
35d05778 1721 if (ret == -ESTALE)
3d4ff43d 1722 d_drop(ctx->dentry);
c6d00e63 1723 nfs4_opendata_put(opendata);
864472e9 1724 return ret;
1da177e4
LT		 1725}
1726
a9ed2e25 1727static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1728{
539cd03a 1729 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1730 struct nfs4_exception exception = { };
1731 int err;
1732
1733 do {
539cd03a 1734 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1735 switch (err) {
1736 default:
1737 goto out;
1738 case -NFS4ERR_GRACE:
1739 case -NFS4ERR_DELAY:
1740 nfs4_handle_exception(server, err, &exception);
1741 err = 0;
1742 }
202b50dc 1743 } while (exception.retry);
a9ed2e25 1744out:
202b50dc
TM		 1745 return err;
1746}
1747
1da177e4
LT		 1748static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1749{
1da177e4 1750 struct nfs_open_context *ctx;
864472e9 1751 int ret;
1da177e4 1752
864472e9
TM		 1753 ctx = nfs4_state_find_open_context(state);
1754 if (IS_ERR(ctx))
1755 return PTR_ERR(ctx);
539cd03a 1756 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1757 put_nfs_open_context(ctx);
1758 return ret;
1da177e4
LT		 1759}
1760
f062eb6c 1761#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1762static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1763{
f062eb6c 1764 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1765 nfs4_stateid *stateid = &state->stateid;
1766 int status;
1767
1768 /* If a state reset has been done, test_stateid is unneeded */
1769 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1770 return;
1771
1772 status = nfs41_test_stateid(server, stateid);
1773 if (status != NFS_OK) {
1774 /* Free the stateid unless the server explicitly
1775 * informs us the stateid is unrecognized. */
1776 if (status != -NFS4ERR_BAD_STATEID)
1777 nfs41_free_stateid(server, stateid);
6938867e 1778 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1779
6938867e
BS		 1780 write_seqlock(&state->seqlock);
1781 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1782 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1783 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1784 }
1785}
1786
1787/**
1788 * nfs41_check_open_stateid - possibly free an open stateid
1789 *
1790 * @state: NFSv4 state for an inode
1791 *
1792 * Returns NFS_OK if recovery for this stateid is now finished.
1793 * Otherwise a negative NFS4ERR value is returned.
1794 */
1795static int nfs41_check_open_stateid(struct nfs4_state *state)
1796{
1797 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1798 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1799 int status;
1800
1801 /* If a state reset has been done, test_stateid is unneeded */
1802 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1803 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1804 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1805 return -NFS4ERR_BAD_STATEID;
1806
1807 status = nfs41_test_stateid(server, stateid);
1808 if (status != NFS_OK) {
1809 /* Free the stateid unless the server explicitly
1810 * informs us the stateid is unrecognized. */
1811 if (status != -NFS4ERR_BAD_STATEID)
1812 nfs41_free_stateid(server, stateid);
1813
1814 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1815 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1816 clear_bit(NFS_O_RDWR_STATE, &state->flags);
b01dd1d8
BS		 1817 }
1818 return status;
1819}
1820
1821static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1822{
eb64cf96 1823 int status;
b01dd1d8 1824
3e60ffdd
CL		 1825 nfs41_clear_delegation_stateid(state);
1826 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1827 if (status != NFS_OK)
1828 status = nfs4_open_expired(sp, state);
1829 return status;
f062eb6c
BS		 1830}
1831#endif
1832
aa53ed54
JL		 1833/*
1834 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1835 * fields corresponding to attributes that were used to store the verifier.
1836 * Make sure we clobber those fields in the later setattr call
1837 */
1838static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1839{
1840 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1841 !(sattr->ia_valid & ATTR_ATIME_SET))
1842 sattr->ia_valid |= ATTR_ATIME;
1843
1844 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1845 !(sattr->ia_valid & ATTR_MTIME_SET))
1846 sattr->ia_valid |= ATTR_MTIME;
1847}
1848
1da177e4 1849/*
24ac23ab 1850 * Returns a referenced nfs4_state
1da177e4 1851 */
82be417a
AA		 1852static int _nfs4_do_open(struct inode *dir,
1853 struct dentry *dentry,
1854 fmode_t fmode,
1855 int flags,
1856 struct iattr *sattr,
1857 struct rpc_cred *cred,
1858 struct nfs4_state **res,
1859 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1860{
1861 struct nfs4_state_owner *sp;
1862 struct nfs4_state *state = NULL;
1863 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1864 struct nfs4_opendata *opendata;
aac00a8d 1865 int status;
1da177e4
LT		 1866
1867 /* Protect against reboot recovery conflicts */
1da177e4 1868 status = -ENOMEM;
d1e284d5
TM		 1869 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1870 if (sp == NULL) {
1da177e4
LT		 1871 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1872 goto out_err;
1873 }
58d9714a
TM		 1874 status = nfs4_recover_expired_lease(server);
1875 if (status != 0)
b4454fe1 1876 goto err_put_state_owner;
82a2c1b7
AV		 1877 if (dentry->d_inode != NULL)
1878 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1879 status = -ENOMEM;
82a2c1b7 1880 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1881 if (opendata == NULL)
95d35cb4 1882 goto err_put_state_owner;
1da177e4 1883
82be417a
AA		 1884 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1885 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1886 if (!opendata->f_attr.mdsthreshold)
1887 goto err_opendata_put;
1549210f 1888 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 1889 }
82a2c1b7
AV		 1890 if (dentry->d_inode != NULL)
1891 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1892
24ac23ab 1893 status = _nfs4_proc_open(opendata);
1da177e4 1894 if (status != 0)
c6d00e63 1895 goto err_opendata_put;
1da177e4 1896
24ac23ab 1897 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1898 status = PTR_ERR(state);
1899 if (IS_ERR(state))
c6d00e63 1900 goto err_opendata_put;
0df5dd4a 1901 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1902 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e 1903
6168f62c
WAA		 1904 status = nfs4_opendata_access(cred, opendata, state, fmode);
1905 if (status != 0)
1906 goto err_opendata_put;
1907
0ab64e0e
TM		 1908 if (opendata->o_arg.open_flags & O_EXCL) {
1909 nfs4_exclusive_attrset(opendata, sattr);
1910
1911 nfs_fattr_init(opendata->o_res.f_attr);
1912 status = nfs4_do_setattr(state->inode, cred,
1913 opendata->o_res.f_attr, sattr,
1914 state);
1915 if (status == 0)
1916 nfs_setattr_update_inode(state->inode, sattr);
1917 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1918 }
82be417a
AA		 1919
1920 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1921 *ctx_th = opendata->f_attr.mdsthreshold;
1922 else
1923 kfree(opendata->f_attr.mdsthreshold);
1924 opendata->f_attr.mdsthreshold = NULL;
1925
c6d00e63 1926 nfs4_opendata_put(opendata);
1da177e4 1927 nfs4_put_state_owner(sp);
1da177e4
LT		 1928 *res = state;
1929 return 0;
c6d00e63 1930err_opendata_put:
82be417a 1931 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 1932 nfs4_opendata_put(opendata);
e56e0b78
TM		 1933err_put_state_owner:
1934 nfs4_put_state_owner(sp);
1da177e4 1935out_err:
1da177e4
LT		 1936 *res = NULL;
1937 return status;
1938}
1939
1940
82be417a
AA		 1941static struct nfs4_state *nfs4_do_open(struct inode *dir,
1942 struct dentry *dentry,
1943 fmode_t fmode,
1944 int flags,
1945 struct iattr *sattr,
1946 struct rpc_cred *cred,
1947 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1948{
1949 struct nfs4_exception exception = { };
1950 struct nfs4_state *res;
1951 int status;
1952
6168f62c 1953 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 1954 do {
82be417a
AA		 1955 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1956 &res, ctx_th);
1da177e4
LT		 1957 if (status == 0)
1958 break;
1959 /* NOTE: BAD_SEQID means the server and client disagree about the
1960 * book-keeping w.r.t. state-changing operations
1961 * (OPEN/CLOSE/LOCK/LOCKU...)
1962 * It is actually a sign of a bug on the client or on the server.
1963 *
1964 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1965 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1966 * have unhashed the old state_owner for us, and that we can
1967 * therefore safely retry using a new one. We should still warn
1968 * the user though...
1969 */
1970 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 1971 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 1972 " returned a bad sequence-id error!\n",
1973 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1974 exception.retry = 1;
1975 continue;
1976 }
550f5747
TM		 1977 /*
1978 * BAD_STATEID on OPEN means that the server cancelled our
1979 * state before it received the OPEN_CONFIRM.
1980 * Recover by retrying the request as per the discussion
1981 * on Page 181 of RFC3530.
1982 */
1983 if (status == -NFS4ERR_BAD_STATEID) {
1984 exception.retry = 1;
1985 continue;
1986 }
aac00a8d
TM		 1987 if (status == -EAGAIN) {
1988 /* We must have found a delegation */
1989 exception.retry = 1;
1990 continue;
1991 }
1da177e4
LT		 1992 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1993 status, &exception));
1994 } while (exception.retry);
1995 return res;
1996}
1997
659bfcd6
TM		 1998static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1999 struct nfs_fattr *fattr, struct iattr *sattr,
2000 struct nfs4_state *state)
1da177e4 2001{
3e4f6290 2002 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2003 struct nfs_setattrargs arg = {
3e4f6290 2004 .fh = NFS_FH(inode),
1da177e4
LT		 2005 .iap = sattr,
2006 .server = server,
2007 .bitmask = server->attr_bitmask,
2008 };
2009 struct nfs_setattrres res = {
2010 .fattr = fattr,
2011 .server = server,
2012 };
2013 struct rpc_message msg = {
659bfcd6
TM		 2014 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2015 .rpc_argp = &arg,
2016 .rpc_resp = &res,
2017 .rpc_cred = cred,
1da177e4 2018 };
26e976a8 2019 unsigned long timestamp = jiffies;
65e4308d 2020 int status;
1da177e4 2021
0e574af1 2022 nfs_fattr_init(fattr);
1da177e4 2023
4fc8796d 2024 if (state != NULL) {
2a369153
TM		 2025 struct nfs_lockowner lockowner = {
2026 .l_owner = current->files,
2027 .l_pid = current->tgid,
2028 };
4fc8796d 2029 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2030 &lockowner);
4fc8796d
TM		 2031 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2032 FMODE_WRITE)) {
3e4f6290 2033 /* Use that stateid */
08e9eac4 2034 } else
f597c537 2035 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2036
7c513058 2037 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2038 if (status == 0 && state != NULL)
2039 renew_lease(server, timestamp);
65e4308d 2040 return status;
1da177e4
LT		 2041}
2042
659bfcd6
TM		 2043static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2044 struct nfs_fattr *fattr, struct iattr *sattr,
2045 struct nfs4_state *state)
1da177e4 2046{
3e4f6290 2047 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2048 struct nfs4_exception exception = {
2049 .state = state,
3114ea7a 2050 .inode = inode,
a1d0b5ee 2051 };
1da177e4
LT		 2052 int err;
2053 do {
451146be
TM		 2054 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2055 switch (err) {
2056 case -NFS4ERR_OPENMODE:
2057 if (state && !(state->state & FMODE_WRITE)) {
2058 err = -EBADF;
2059 if (sattr->ia_valid & ATTR_OPEN)
2060 err = -EACCES;
2061 goto out;
2062 }
2063 }
2064 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2065 } while (exception.retry);
451146be 2066out:
1da177e4
LT		 2067 return err;
2068}
2069
2070struct nfs4_closedata {
2071 struct inode *inode;
2072 struct nfs4_state *state;
2073 struct nfs_closeargs arg;
2074 struct nfs_closeres res;
516a6af6 2075 struct nfs_fattr fattr;
26e976a8 2076 unsigned long timestamp;
f7e8917a
FI		 2077 bool roc;
2078 u32 roc_barrier;
1da177e4
LT		 2079};
2080
963d8fe5 2081static void nfs4_free_closedata(void *data)
9512135d 2082{
963d8fe5
TM		 2083 struct nfs4_closedata *calldata = data;
2084 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2085 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2086
f7e8917a
FI		 2087 if (calldata->roc)
2088 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2089 nfs4_put_open_state(calldata->state);
2090 nfs_free_seqid(calldata->arg.seqid);
9512135d 2091 nfs4_put_state_owner(sp);
324d003b 2092 nfs_sb_deactive_async(sb);
9512135d
TM		 2093 kfree(calldata);
2094}
2095
88069f77
TM		 2096static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2097 fmode_t fmode)
2098{
2099 spin_lock(&state->owner->so_lock);
2100 if (!(fmode & FMODE_READ))
2101 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2102 if (!(fmode & FMODE_WRITE))
2103 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2104 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2105 spin_unlock(&state->owner->so_lock);
2106}
2107
963d8fe5 2108static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2109{
963d8fe5 2110 struct nfs4_closedata *calldata = data;
1da177e4 2111 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2112 struct nfs_server *server = NFS_SERVER(calldata->inode);
2113
a3ca5651 2114 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2115 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2116 return;
1da177e4
LT		 2117 /* hmm. we are done with the inode, and in the process of freeing
2118 * the state_owner. we keep this around to process errors
2119 */
1da177e4
LT		 2120 switch (task->tk_status) {
2121 case 0:
f7e8917a
FI		 2122 if (calldata->roc)
2123 pnfs_roc_set_barrier(state->inode,
2124 calldata->roc_barrier);
45328c35 2125 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2126 renew_lease(server, calldata->timestamp);
88069f77
TM		 2127 nfs4_close_clear_stateid_flags(state,
2128 calldata->arg.fmode);
1da177e4
LT		 2129 break;
2130 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2131 case -NFS4ERR_OLD_STATEID:
2132 case -NFS4ERR_BAD_STATEID:
1da177e4 2133 case -NFS4ERR_EXPIRED:
dc0b027d 2134 if (calldata->arg.fmode == 0)
9e33bed5 2135 break;
1da177e4 2136 default:
72211dbe
TM		 2137 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2138 rpc_restart_call_prepare(task);
1da177e4 2139 }
72211dbe 2140 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2141 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2142 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2143}
2144
4ce70ada 2145static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2146{
4ce70ada 2147 struct nfs4_closedata *calldata = data;
9512135d 2148 struct nfs4_state *state = calldata->state;
7fdab069 2149 struct inode *inode = calldata->inode;
88069f77 2150 int call_close = 0;
9512135d 2151
a3ca5651 2152 dprintk("%s: begin!\n", __func__);
963d8fe5 2153 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 2154 return;
003707c7 2155
88069f77
TM		 2156 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2157 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2158 spin_lock(&state->owner->so_lock);
003707c7 2159 /* Calculate the change in open mode */
e7616923 2160 if (state->n_rdwr == 0) {
003707c7 2161 if (state->n_rdonly == 0) {
88069f77
TM		 2162 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2163 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2164 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2165 }
2166 if (state->n_wronly == 0) {
88069f77
TM		 2167 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2168 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2169 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2170 }
e7616923 2171 }
4cecb76f 2172 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2173
2174 if (!call_close) {
963d8fe5
TM		 2175 /* Note: exit _without_ calling nfs4_close_done */
2176 task->tk_action = NULL;
a3ca5651 2177 goto out;
9512135d 2178 }
88069f77 2179
f7e8917a 2180 if (calldata->arg.fmode == 0) {
88069f77 2181 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2182 if (calldata->roc &&
7fdab069 2183 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
a3ca5651 2184 goto out;
f7e8917a 2185 }
88069f77 2186
516a6af6 2187 nfs_fattr_init(calldata->res.fattr);
26e976a8 2188 calldata->timestamp = jiffies;
7fdab069 2189 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2190 &calldata->arg.seq_args,
2191 &calldata->res.seq_res,
2240a9e2
TM		 2192 task) != 0)
2193 nfs_release_seqid(calldata->arg.seqid);
2194 else
2195 rpc_call_start(task);
a3ca5651
CL		 2196out:
2197 dprintk("%s: done!\n", __func__);
1da177e4
LT		 2198}
2199
963d8fe5 2200static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2201 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2202 .rpc_call_done = nfs4_close_done,
2203 .rpc_release = nfs4_free_closedata,
2204};
2205
1da177e4
LT		 2206/*
2207 * It is possible for data to be read/written from a mem-mapped file
2208 * after the sys_close call (which hits the vfs layer as a flush).
2209 * This means that we can't safely call nfsv4 close on a file until
2210 * the inode is cleared. This in turn means that we are not good
2211 * NFSv4 citizens - we do not indicate to the server to update the file's
2212 * share state even when we are done with one of the three share
2213 * stateid's in the inode.
2214 *
2215 * NOTE: Caller must be holding the sp->so_owner semaphore!
2216 */
1f7977c1 2217int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2218{
4a35bd41 2219 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2220 struct nfs4_closedata *calldata;
b39e625b
TM		 2221 struct nfs4_state_owner *sp = state->owner;
2222 struct rpc_task *task;
5138fde0
TM		 2223 struct rpc_message msg = {
2224 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2225 .rpc_cred = state->owner->so_cred,
2226 };
c970aa85
TM		 2227 struct rpc_task_setup task_setup_data = {
2228 .rpc_client = server->client,
5138fde0 2229 .rpc_message = &msg,
c970aa85 2230 .callback_ops = &nfs4_close_ops,
101070ca 2231 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2232 .flags = RPC_TASK_ASYNC,
2233 };
9512135d 2234 int status = -ENOMEM;
1da177e4 2235
8535b2be 2236 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2237 if (calldata == NULL)
9512135d 2238 goto out;
9d12b216 2239 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2240 calldata->inode = state->inode;
1da177e4 2241 calldata->state = state;
4a35bd41 2242 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2243 calldata->arg.stateid = &state->open_stateid;
1da177e4 2244 /* Serialization for the sequence id */
8535b2be 2245 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2246 if (calldata->arg.seqid == NULL)
2247 goto out_free_calldata;
dc0b027d 2248 calldata->arg.fmode = 0;
a65318bf 2249 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2250 calldata->res.fattr = &calldata->fattr;
c1d51931 2251 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2252 calldata->res.server = server;
1f7977c1 2253 calldata->roc = pnfs_roc(state->inode);
643168c2 2254 nfs_sb_active(calldata->inode->i_sb);
9512135d 2255
1174dd1f
TM		 2256 msg.rpc_argp = &calldata->arg;
2257 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2258 task_setup_data.callback_data = calldata;
2259 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2260 if (IS_ERR(task))
2261 return PTR_ERR(task);
a49c3c77
TM		 2262 status = 0;
2263 if (wait)
2264 status = rpc_wait_for_completion_task(task);
b39e625b 2265 rpc_put_task(task);
a49c3c77 2266 return status;
9512135d
TM		 2267out_free_calldata:
2268 kfree(calldata);
2269out:
b39e625b
TM		 2270 nfs4_put_open_state(state);
2271 nfs4_put_state_owner(sp);
9512135d 2272 return status;
1da177e4
LT		 2273}
2274
2b484297 2275static struct inode *
cd9a1c0e 2276nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2277{
1da177e4 2278 struct nfs4_state *state;
1da177e4 2279
565277f6 2280 /* Protect against concurrent sillydeletes */
82be417a
AA		 2281 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2282 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2283 if (IS_ERR(state))
2284 return ERR_CAST(state);
cd9a1c0e 2285 ctx->state = state;
f46e0bd3 2286 return igrab(state->inode);
1da177e4
LT		 2287}
2288
1185a552 2289static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2290{
2291 if (ctx->state == NULL)
2292 return;
2293 if (is_sync)
643168c2 2294 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2295 else
643168c2 2296 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2297}
1da177e4
LT		 2298
2299static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2300{
43652ad5
BH		 2301 struct nfs4_server_caps_arg args = {
2302 .fhandle = fhandle,
2303 };
1da177e4
LT		 2304 struct nfs4_server_caps_res res = {};
2305 struct rpc_message msg = {
2306 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2307 .rpc_argp = &args,
1da177e4
LT		 2308 .rpc_resp = &res,
2309 };
2310 int status;
2311
7c513058 2312 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2313 if (status == 0) {
2314 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2315 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2316 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2317 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2318 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2319 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2320 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2321 server->caps |= NFS_CAP_ACLS;
2322 if (res.has_links != 0)
2323 server->caps |= NFS_CAP_HARDLINKS;
2324 if (res.has_symlinks != 0)
2325 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2326 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2327 server->caps |= NFS_CAP_FILEID;
2328 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2329 server->caps |= NFS_CAP_MODE;
2330 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2331 server->caps |= NFS_CAP_NLINK;
2332 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2333 server->caps |= NFS_CAP_OWNER;
2334 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2335 server->caps |= NFS_CAP_OWNER_GROUP;
2336 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2337 server->caps |= NFS_CAP_ATIME;
2338 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2339 server->caps |= NFS_CAP_CTIME;
2340 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2341 server->caps |= NFS_CAP_MTIME;
2342
a65318bf
TM		 2343 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2344 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2345 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2346 server->acl_bitmask = res.acl_bitmask;
264e6351 2347 server->fh_expire_type = res.fh_expire_type;
1da177e4 2348 }
cccef3b9 2349
1da177e4
LT		 2350 return status;
2351}
2352
55a97593 2353int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2354{
2355 struct nfs4_exception exception = { };
2356 int err;
2357 do {
2358 err = nfs4_handle_exception(server,
2359 _nfs4_server_capabilities(server, fhandle),
2360 &exception);
2361 } while (exception.retry);
2362 return err;
2363}
2364
2365static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2366 struct nfs_fsinfo *info)
2367{
1da177e4
LT		 2368 struct nfs4_lookup_root_arg args = {
2369 .bitmask = nfs4_fattr_bitmap,
2370 };
2371 struct nfs4_lookup_res res = {
2372 .server = server,
0e574af1 2373 .fattr = info->fattr,
1da177e4
LT		 2374 .fh = fhandle,
2375 };
2376 struct rpc_message msg = {
2377 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2378 .rpc_argp = &args,
2379 .rpc_resp = &res,
2380 };
008f55d0 2381
0e574af1 2382 nfs_fattr_init(info->fattr);
7c513058 2383 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2384}
2385
2386static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2387 struct nfs_fsinfo *info)
2388{
2389 struct nfs4_exception exception = { };
2390 int err;
2391 do {
fb8a5ba8
BS		 2392 err = _nfs4_lookup_root(server, fhandle, info);
2393 switch (err) {
2394 case 0:
2395 case -NFS4ERR_WRONGSEC:
05e9cfb4 2396 goto out;
fb8a5ba8
BS		 2397 default:
2398 err = nfs4_handle_exception(server, err, &exception);
2399 }
1da177e4 2400 } while (exception.retry);
05e9cfb4 2401out:
1da177e4
LT		 2402 return err;
2403}
2404
8f70e95f
BS		 2405static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2406 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2407{
2408 struct rpc_auth *auth;
2409 int ret;
2410
2411 auth = rpcauth_create(flavor, server->client);
e8d920c5 2412 if (IS_ERR(auth)) {
8f70e95f
BS		 2413 ret = -EIO;
2414 goto out;
2415 }
2416 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2417out:
2418 return ret;
2419}
2420
801a16dc 2421static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2422 struct nfs_fsinfo *info)
1da177e4 2423{
8f70e95f 2424 int i, len, status = 0;
0fabee24 2425 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2426
6a1a1e34 2427 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
4ea8fed5
TM		 2428 if (len < 0)
2429 return len;
8f70e95f
BS		 2430
2431 for (i = 0; i < len; i++) {
6a1a1e34
CL		 2432 /* AUTH_UNIX is the default flavor if none was specified,
2433 * thus has already been tried. */
2434 if (flav_array[i] == RPC_AUTH_UNIX)
2435 continue;
2436
8f70e95f 2437 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2438 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2439 continue;
2440 break;
8f70e95f 2441 }
fb8a5ba8
BS		 2442 /*
2443 * -EACCESS could mean that the user doesn't have correct permissions
2444 * to access the mount. It could also mean that we tried to mount
2445 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2446 * existing mount programs don't handle -EACCES very well so it should
2447 * be mapped to -EPERM instead.
2448 */
2449 if (status == -EACCES)
2450 status = -EPERM;
801a16dc
BS		 2451 return status;
2452}
2453
2454/*
2455 * get the file handle for the "/" directory on the server
2456 */
3028eb2b
BS		 2457int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2458 struct nfs_fsinfo *info)
801a16dc 2459{
fca78d6d 2460 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2461 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2462 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2463 /*
2464 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2465 * by nfs4_map_errors() as this function exits.
2466 */
fca78d6d 2467 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2468 if (status == 0)
2469 status = nfs4_server_capabilities(server, fhandle);
2470 if (status == 0)
2471 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2472 return nfs4_map_errors(status);
1da177e4
LT		 2473}
2474
bae36241
BS		 2475static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2476 struct nfs_fsinfo *info)
2477{
2478 int error;
2479 struct nfs_fattr *fattr = info->fattr;
2480
2481 error = nfs4_server_capabilities(server, mntfh);
2482 if (error < 0) {
2483 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2484 return error;
2485 }
2486
2487 error = nfs4_proc_getattr(server, mntfh, fattr);
2488 if (error < 0) {
2489 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2490 return error;
2491 }
2492
2493 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2494 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2495 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2496
2497 return error;
2498}
2499
6b97fd3d
MN		 2500/*
2501 * Get locations and (maybe) other attributes of a referral.
2502 * Note that we'll actually follow the referral later when
2503 * we detect fsid mismatch in inode revalidation
2504 */
f05d147f
BS		 2505static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2506 const struct qstr *name, struct nfs_fattr *fattr,
2507 struct nfs_fh *fhandle)
6b97fd3d
MN		 2508{
2509 int status = -ENOMEM;
2510 struct page *page = NULL;
2511 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2512
2513 page = alloc_page(GFP_KERNEL);
2514 if (page == NULL)
2515 goto out;
2516 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2517 if (locations == NULL)
2518 goto out;
2519
f05d147f 2520 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2521 if (status != 0)
2522 goto out;
2523 /* Make sure server returned a different fsid for the referral */
2524 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2525 dprintk("%s: server did not return a different fsid for"
2526 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2527 status = -EIO;
2528 goto out;
2529 }
533eb461
AA		 2530 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2531 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2532
533eb461 2533 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2534 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2535 memset(fhandle, 0, sizeof(struct nfs_fh));
2536out:
2537 if (page)
2538 __free_page(page);
5d7ca35a 2539 kfree(locations);
6b97fd3d
MN		 2540 return status;
2541}
2542
1da177e4
LT		 2543static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2544{
2545 struct nfs4_getattr_arg args = {
2546 .fh = fhandle,
2547 .bitmask = server->attr_bitmask,
2548 };
2549 struct nfs4_getattr_res res = {
2550 .fattr = fattr,
2551 .server = server,
2552 };
2553 struct rpc_message msg = {
2554 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2555 .rpc_argp = &args,
2556 .rpc_resp = &res,
2557 };
2558
0e574af1 2559 nfs_fattr_init(fattr);
7c513058 2560 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2561}
2562
2563static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2564{
2565 struct nfs4_exception exception = { };
2566 int err;
2567 do {
2568 err = nfs4_handle_exception(server,
2569 _nfs4_proc_getattr(server, fhandle, fattr),
2570 &exception);
2571 } while (exception.retry);
2572 return err;
2573}
2574
2575/*
2576 * The file is not closed if it is opened due to the a request to change
2577 * the size of the file. The open call will not be needed once the
2578 * VFS layer lookup-intents are implemented.
2579 *
2580 * Close is called when the inode is destroyed.
2581 * If we haven't opened the file for O_WRONLY, we
2582 * need to in the size_change case to obtain a stateid.
2583 *
2584 * Got race?
2585 * Because OPEN is always done by name in nfsv4, it is
2586 * possible that we opened a different file by the same
2587 * name. We can recognize this race condition, but we
2588 * can't do anything about it besides returning an error.
2589 *
2590 * This will be fixed with VFS changes (lookup-intent).
2591 */
2592static int
2593nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2594 struct iattr *sattr)
2595{
08e9eac4 2596 struct inode *inode = dentry->d_inode;
659bfcd6 2597 struct rpc_cred *cred = NULL;
d530838b 2598 struct nfs4_state *state = NULL;
1da177e4
LT		 2599 int status;
2600
8a1636c4
BH		 2601 if (pnfs_ld_layoutret_on_setattr(inode))
2602 pnfs_return_layout(inode);
2603
0e574af1 2604 nfs_fattr_init(fattr);
1da177e4 2605
2669940d
AA		 2606 /* Deal with open(O_TRUNC) */
2607 if (sattr->ia_valid & ATTR_OPEN)
2608 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2609
2610 /* Optimization: if the end result is no change, don't RPC */
2611 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2612 return 0;
2613
d530838b 2614 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2615 if (sattr->ia_valid & ATTR_FILE) {
2616 struct nfs_open_context *ctx;
2617
2618 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2619 if (ctx) {
2620 cred = ctx->cred;
2621 state = ctx->state;
2622 }
659bfcd6 2623 }
08e9eac4 2624
659bfcd6 2625 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2626 if (status == 0)
2627 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2628 return status;
2629}
2630
0c2e53f1
TM		 2631static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2632 const struct qstr *name, struct nfs_fh *fhandle,
2633 struct nfs_fattr *fattr)
2b3de441 2634{
0c2e53f1 2635 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2636 int status;
2637 struct nfs4_lookup_arg args = {
2638 .bitmask = server->attr_bitmask,
0c2e53f1 2639 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2640 .name = name,
2641 };
2642 struct nfs4_lookup_res res = {
2643 .server = server,
2644 .fattr = fattr,
2645 .fh = fhandle,
2646 };
2647 struct rpc_message msg = {
2648 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2649 .rpc_argp = &args,
2650 .rpc_resp = &res,
2651 };
2652
2653 nfs_fattr_init(fattr);
2654
1da177e4 2655 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2656 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2657 dprintk("NFS reply lookup: %d\n", status);
2658 return status;
2659}
2660
72de53ec 2661static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2662{
7ebb9315 2663 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2664 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2665 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2666 fattr->nlink = 2;
2667}
2668
72de53ec
BS		 2669static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2670 struct qstr *name, struct nfs_fh *fhandle,
2671 struct nfs_fattr *fattr)
1da177e4
LT		 2672{
2673 struct nfs4_exception exception = { };
72de53ec 2674 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2675 int err;
2676 do {
72de53ec
BS		 2677 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2678 switch (err) {
08ef7bd3 2679 case -NFS4ERR_BADNAME:
72de53ec
BS		 2680 err = -ENOENT;
2681 goto out;
0c2e53f1 2682 case -NFS4ERR_MOVED:
f05d147f 2683 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2684 goto out;
0c2e53f1 2685 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2686 err = -EPERM;
2687 if (client != *clnt)
2688 goto out;
2689
2690 client = nfs4_create_sec_client(client, dir, name);
2691 if (IS_ERR(client))
2692 return PTR_ERR(client);
2693
2694 exception.retry = 1;
2695 break;
2696 default:
2697 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2698 }
1da177e4 2699 } while (exception.retry);
72de53ec
BS		 2700
2701out:
2702 if (err == 0)
2703 *clnt = client;
2704 else if (client != *clnt)
2705 rpc_shutdown_client(client);
2706
1da177e4
LT		 2707 return err;
2708}
2709
80a16b21 2710static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2711 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2712{
2713 int status;
2714 struct rpc_clnt *client = NFS_CLIENT(dir);
2715
2716 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2717 if (client != NFS_CLIENT(dir)) {
2718 rpc_shutdown_client(client);
2719 nfs_fixup_secinfo_attributes(fattr);
2720 }
2721 return status;
2722}
2723
f05d147f
BS		 2724struct rpc_clnt *
2725nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2726 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2727{
2728 int status;
2729 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2730
2731 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2732 if (status < 0) {
2733 rpc_shutdown_client(client);
2734 return ERR_PTR(status);
2735 }
2736 return client;
2737}
2738
1da177e4
LT		 2739static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2740{
76b32999 2741 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2742 struct nfs4_accessargs args = {
2743 .fh = NFS_FH(inode),
a4980e78 2744 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2745 };
2746 struct nfs4_accessres res = {
2747 .server = server,
1da177e4 2748 };
1da177e4
LT		 2749 struct rpc_message msg = {
2750 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2751 .rpc_argp = &args,
2752 .rpc_resp = &res,
2753 .rpc_cred = entry->cred,
2754 };
2755 int mode = entry->mask;
2756 int status;
2757
2758 /*
2759 * Determine which access bits we want to ask for...
2760 */
2761 if (mode & MAY_READ)
2762 args.access |= NFS4_ACCESS_READ;
2763 if (S_ISDIR(inode->i_mode)) {
2764 if (mode & MAY_WRITE)
2765 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2766 if (mode & MAY_EXEC)
2767 args.access |= NFS4_ACCESS_LOOKUP;
2768 } else {
2769 if (mode & MAY_WRITE)
2770 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2771 if (mode & MAY_EXEC)
2772 args.access |= NFS4_ACCESS_EXECUTE;
2773 }
c407d41a
TM		 2774
2775 res.fattr = nfs_alloc_fattr();
2776 if (res.fattr == NULL)
2777 return -ENOMEM;
2778
7c513058 2779 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2780 if (!status) {
6168f62c 2781 nfs_access_set_mask(entry, res.access);
c407d41a 2782 nfs_refresh_inode(inode, res.fattr);
1da177e4 2783 }
c407d41a 2784 nfs_free_fattr(res.fattr);
1da177e4
LT		 2785 return status;
2786}
2787
2788static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2789{
2790 struct nfs4_exception exception = { };
2791 int err;
2792 do {
2793 err = nfs4_handle_exception(NFS_SERVER(inode),
2794 _nfs4_proc_access(inode, entry),
2795 &exception);
2796 } while (exception.retry);
2797 return err;
2798}
2799
2800/*
2801 * TODO: For the time being, we don't try to get any attributes
2802 * along with any of the zero-copy operations READ, READDIR,
2803 * READLINK, WRITE.
2804 *
2805 * In the case of the first three, we want to put the GETATTR
2806 * after the read-type operation -- this is because it is hard
2807 * to predict the length of a GETATTR response in v4, and thus
2808 * align the READ data correctly. This means that the GETATTR
2809 * may end up partially falling into the page cache, and we should
2810 * shift it into the 'tail' of the xdr_buf before processing.
2811 * To do this efficiently, we need to know the total length
2812 * of data received, which doesn't seem to be available outside
2813 * of the RPC layer.
2814 *
2815 * In the case of WRITE, we also want to put the GETATTR after
2816 * the operation -- in this case because we want to make sure
140150db 2817 * we get the post-operation mtime and size.
1da177e4
LT		 2818 *
2819 * Both of these changes to the XDR layer would in fact be quite
2820 * minor, but I decided to leave them for a subsequent patch.
2821 */
2822static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2823 unsigned int pgbase, unsigned int pglen)
2824{
2825 struct nfs4_readlink args = {
2826 .fh = NFS_FH(inode),
2827 .pgbase = pgbase,
2828 .pglen = pglen,
2829 .pages = &page,
2830 };
f50c7000 2831 struct nfs4_readlink_res res;
1da177e4
LT		 2832 struct rpc_message msg = {
2833 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2834 .rpc_argp = &args,
f50c7000 2835 .rpc_resp = &res,
1da177e4
LT		 2836 };
2837
7c513058 2838 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2839}
2840
2841static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2842 unsigned int pgbase, unsigned int pglen)
2843{
2844 struct nfs4_exception exception = { };
2845 int err;
2846 do {
2847 err = nfs4_handle_exception(NFS_SERVER(inode),
2848 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2849 &exception);
2850 } while (exception.retry);
2851 return err;
2852}
2853
1da177e4 2854/*
8867fe58 2855 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2856 */
1da177e4
LT		 2857static int
2858nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2859 int flags)
1da177e4 2860{
8867fe58 2861 struct nfs_open_context *ctx;
1da177e4 2862 struct nfs4_state *state;
1da177e4
LT		 2863 int status = 0;
2864
8867fe58
MS		 2865 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2866 if (IS_ERR(ctx))
2867 return PTR_ERR(ctx);
2868
a8a5da99 2869 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 2870 state = nfs4_do_open(dir, dentry, ctx->mode,
2871 flags, sattr, ctx->cred,
2872 &ctx->mdsthreshold);
d4d9cdcb 2873 d_drop(dentry);
1da177e4
LT		 2874 if (IS_ERR(state)) {
2875 status = PTR_ERR(state);
c0204fd2 2876 goto out;
1da177e4 2877 }
d4d9cdcb 2878 d_add(dentry, igrab(state->inode));
d75340cc 2879 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 2880 ctx->state = state;
1da177e4 2881out:
8867fe58 2882 put_nfs_open_context(ctx);
1da177e4
LT		 2883 return status;
2884}
2885
2886static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2887{
16e42959 2888 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2889 struct nfs_removeargs args = {
1da177e4 2890 .fh = NFS_FH(dir),
26fe5750 2891 .name = *name,
16e42959 2892 };
4fdc17b2 2893 struct nfs_removeres res = {
16e42959 2894 .server = server,
1da177e4 2895 };
1da177e4 2896 struct rpc_message msg = {
4fdc17b2
TM		 2897 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2898 .rpc_argp = &args,
2899 .rpc_resp = &res,
1da177e4 2900 };
778d2817 2901 int status;
1da177e4 2902
7c513058 2903 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 2904 if (status == 0)
16e42959 2905 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 2906 return status;
2907}
2908
2909static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2910{
2911 struct nfs4_exception exception = { };
2912 int err;
2913 do {
2914 err = nfs4_handle_exception(NFS_SERVER(dir),
2915 _nfs4_proc_remove(dir, name),
2916 &exception);
2917 } while (exception.retry);
2918 return err;
2919}
2920
e4eff1a6 2921static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2922{
e4eff1a6
TM		 2923 struct nfs_server *server = NFS_SERVER(dir);
2924 struct nfs_removeargs *args = msg->rpc_argp;
2925 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2926
e4eff1a6 2927 res->server = server;
1da177e4 2928 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 2929 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 2930}
2931
34e137cc
BS		 2932static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2933{
2934 if (nfs4_setup_sequence(NFS_SERVER(data->dir),
2935 &data->args.seq_args,
2936 &data->res.seq_res,
2937 task))
2938 return;
2939 rpc_call_start(task);
1da177e4
LT		 2940}
2941
e4eff1a6 2942static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2943{
e4eff1a6
TM		 2944 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2945
14516c3a
TM		 2946 if (!nfs4_sequence_done(task, &res->seq_res))
2947 return 0;
9e33bed5 2948 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2949 return 0;
2950 update_changeattr(dir, &res->cinfo);
e4eff1a6 2951 return 1;
1da177e4
LT		 2952}
2953
d3d4152a
JL		 2954static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2955{
2956 struct nfs_server *server = NFS_SERVER(dir);
2957 struct nfs_renameargs *arg = msg->rpc_argp;
2958 struct nfs_renameres *res = msg->rpc_resp;
2959
2960 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 2961 res->server = server;
9d12b216 2962 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 2963}
2964
c6bfa1a1
BS		 2965static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2966{
2967 if (nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2968 &data->args.seq_args,
2969 &data->res.seq_res,
2970 task))
2971 return;
2972 rpc_call_start(task);
d3d4152a
JL		 2973}
2974
2975static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2976 struct inode *new_dir)
2977{
2978 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2979
2980 if (!nfs4_sequence_done(task, &res->seq_res))
2981 return 0;
2982 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2983 return 0;
2984
2985 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 2986 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 2987 return 1;
2988}
2989
1da177e4
LT		 2990static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2991 struct inode *new_dir, struct qstr *new_name)
2992{
6caf2c82 2993 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2994 struct nfs_renameargs arg = {
1da177e4
LT		 2995 .old_dir = NFS_FH(old_dir),
2996 .new_dir = NFS_FH(new_dir),
2997 .old_name = old_name,
2998 .new_name = new_name,
6caf2c82 2999 };
e8582a8b 3000 struct nfs_renameres res = {
6caf2c82 3001 .server = server,
1da177e4 3002 };
1da177e4
LT		 3003 struct rpc_message msg = {
3004 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3005 .rpc_argp = &arg,
3006 .rpc_resp = &res,
3007 };
011fff72 3008 int status = -ENOMEM;
1da177e4 3009
7c513058 3010 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3011 if (!status) {
3012 update_changeattr(old_dir, &res.old_cinfo);
3013 update_changeattr(new_dir, &res.new_cinfo);
3014 }
3015 return status;
3016}
3017
3018static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3019 struct inode *new_dir, struct qstr *new_name)
3020{
3021 struct nfs4_exception exception = { };
3022 int err;
3023 do {
3024 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3025 _nfs4_proc_rename(old_dir, old_name,
3026 new_dir, new_name),
3027 &exception);
3028 } while (exception.retry);
3029 return err;
3030}
3031
3032static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3033{
91ba2eee 3034 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3035 struct nfs4_link_arg arg = {
3036 .fh = NFS_FH(inode),
3037 .dir_fh = NFS_FH(dir),
3038 .name = name,
91ba2eee
TM		 3039 .bitmask = server->attr_bitmask,
3040 };
91ba2eee
TM		 3041 struct nfs4_link_res res = {
3042 .server = server,
1da177e4 3043 };
1da177e4
LT		 3044 struct rpc_message msg = {
3045 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3046 .rpc_argp = &arg,
91ba2eee 3047 .rpc_resp = &res,
1da177e4 3048 };
136f2627
TM		 3049 int status = -ENOMEM;
3050
3051 res.fattr = nfs_alloc_fattr();
778d2817 3052 if (res.fattr == NULL)
136f2627 3053 goto out;
1da177e4 3054
7c513058 3055 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3056 if (!status) {
3057 update_changeattr(dir, &res.cinfo);
73a3d07c 3058 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3059 }
136f2627 3060out:
136f2627 3061 nfs_free_fattr(res.fattr);
1da177e4
LT		 3062 return status;
3063}
3064
3065static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3066{
3067 struct nfs4_exception exception = { };
3068 int err;
3069 do {
3070 err = nfs4_handle_exception(NFS_SERVER(inode),
3071 _nfs4_proc_link(inode, dir, name),
3072 &exception);
3073 } while (exception.retry);
3074 return err;
3075}
3076
57dc9a57
TM		 3077struct nfs4_createdata {
3078 struct rpc_message msg;
3079 struct nfs4_create_arg arg;
3080 struct nfs4_create_res res;
3081 struct nfs_fh fh;
3082 struct nfs_fattr fattr;
57dc9a57
TM		 3083};
3084
3085static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3086 struct qstr *name, struct iattr *sattr, u32 ftype)
3087{
3088 struct nfs4_createdata *data;
3089
3090 data = kzalloc(sizeof(*data), GFP_KERNEL);
3091 if (data != NULL) {
3092 struct nfs_server *server = NFS_SERVER(dir);
3093
3094 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3095 data->msg.rpc_argp = &data->arg;
3096 data->msg.rpc_resp = &data->res;
3097 data->arg.dir_fh = NFS_FH(dir);
3098 data->arg.server = server;
3099 data->arg.name = name;
3100 data->arg.attrs = sattr;
3101 data->arg.ftype = ftype;
3102 data->arg.bitmask = server->attr_bitmask;
3103 data->res.server = server;
3104 data->res.fh = &data->fh;
3105 data->res.fattr = &data->fattr;
57dc9a57 3106 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3107 }
3108 return data;
3109}
3110
3111static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3112{
7c513058 3113 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3114 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3115 if (status == 0) {
3116 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3117 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3118 }
3119 return status;
3120}
3121
3122static void nfs4_free_createdata(struct nfs4_createdata *data)
3123{
3124 kfree(data);
3125}
3126
4f390c15 3127static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3128 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3129{
57dc9a57
TM		 3130 struct nfs4_createdata *data;
3131 int status = -ENAMETOOLONG;
1da177e4 3132
94a6d753 3133 if (len > NFS4_MAXPATHLEN)
57dc9a57 3134 goto out;
4f390c15 3135
57dc9a57
TM		 3136 status = -ENOMEM;
3137 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3138 if (data == NULL)
3139 goto out;
3140
3141 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3142 data->arg.u.symlink.pages = &page;
3143 data->arg.u.symlink.len = len;
1da177e4 3144
57dc9a57
TM		 3145 status = nfs4_do_create(dir, dentry, data);
3146
3147 nfs4_free_createdata(data);
3148out:
1da177e4
LT		 3149 return status;
3150}
3151
4f390c15 3152static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3153 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3154{
3155 struct nfs4_exception exception = { };
3156 int err;
3157 do {
3158 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3159 _nfs4_proc_symlink(dir, dentry, page,
3160 len, sattr),
1da177e4
LT		 3161 &exception);
3162 } while (exception.retry);
3163 return err;
3164}
3165
3166static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3167 struct iattr *sattr)
3168{
57dc9a57
TM		 3169 struct nfs4_createdata *data;
3170 int status = -ENOMEM;
1da177e4 3171
57dc9a57
TM		 3172 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3173 if (data == NULL)
3174 goto out;
3175
3176 status = nfs4_do_create(dir, dentry, data);
3177
3178 nfs4_free_createdata(data);
3179out:
1da177e4
LT		 3180 return status;
3181}
3182
3183static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3184 struct iattr *sattr)
3185{
3186 struct nfs4_exception exception = { };
3187 int err;
a8a5da99
AK		 3188
3189 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3190 do {
3191 err = nfs4_handle_exception(NFS_SERVER(dir),
3192 _nfs4_proc_mkdir(dir, dentry, sattr),
3193 &exception);
3194 } while (exception.retry);
3195 return err;
3196}
3197
3198static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3199 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3200{
3201 struct inode *dir = dentry->d_inode;
3202 struct nfs4_readdir_arg args = {
3203 .fh = NFS_FH(dir),
56e4ebf8 3204 .pages = pages,
1da177e4
LT		 3205 .pgbase = 0,
3206 .count = count,
96d25e53 3207 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3208 .plus = plus,
1da177e4
LT		 3209 };
3210 struct nfs4_readdir_res res;
3211 struct rpc_message msg = {
3212 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3213 .rpc_argp = &args,
3214 .rpc_resp = &res,
3215 .rpc_cred = cred,
3216 };
3217 int status;
3218
3110ff80 3219 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3220 dentry->d_parent->d_name.name,
3221 dentry->d_name.name,
3222 (unsigned long long)cookie);
c3f52af3 3223 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3224 res.pgbase = args.pgbase;
7c513058 3225 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3226 if (status >= 0) {
c3f52af3 3227 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3228 status += args.pgbase;
3229 }
c4812998
TM		 3230
3231 nfs_invalidate_atime(dir);
3232
3110ff80 3233 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3234 return status;
3235}
3236
3237static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3238 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3239{
3240 struct nfs4_exception exception = { };
3241 int err;
3242 do {
3243 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3244 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3245 pages, count, plus),
1da177e4
LT		 3246 &exception);
3247 } while (exception.retry);
3248 return err;
3249}
3250
3251static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3252 struct iattr *sattr, dev_t rdev)
3253{
57dc9a57
TM		 3254 struct nfs4_createdata *data;
3255 int mode = sattr->ia_mode;
3256 int status = -ENOMEM;
1da177e4 3257
57dc9a57
TM		 3258 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3259 if (data == NULL)
3260 goto out;
3261
1da177e4 3262 if (S_ISFIFO(mode))
57dc9a57 3263 data->arg.ftype = NF4FIFO;
1da177e4 3264 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3265 data->arg.ftype = NF4BLK;
3266 data->arg.u.device.specdata1 = MAJOR(rdev);
3267 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3268 }
3269 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3270 data->arg.ftype = NF4CHR;
3271 data->arg.u.device.specdata1 = MAJOR(rdev);
3272 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3273 } else if (!S_ISSOCK(mode)) {
3274 status = -EINVAL;
3275 goto out_free;
1da177e4 3276 }
1da177e4 3277
57dc9a57 3278 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3279out_free:
57dc9a57
TM		 3280 nfs4_free_createdata(data);
3281out:
1da177e4
LT		 3282 return status;
3283}
3284
3285static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3286 struct iattr *sattr, dev_t rdev)
3287{
3288 struct nfs4_exception exception = { };
3289 int err;
a8a5da99
AK		 3290
3291 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3292 do {
3293 err = nfs4_handle_exception(NFS_SERVER(dir),
3294 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3295 &exception);
3296 } while (exception.retry);
3297 return err;
3298}
3299
3300static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3301 struct nfs_fsstat *fsstat)
3302{
3303 struct nfs4_statfs_arg args = {
3304 .fh = fhandle,
3305 .bitmask = server->attr_bitmask,
3306 };
24ad148a
BH		 3307 struct nfs4_statfs_res res = {
3308 .fsstat = fsstat,
3309 };
1da177e4
LT		 3310 struct rpc_message msg = {
3311 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3312 .rpc_argp = &args,
24ad148a 3313 .rpc_resp = &res,
1da177e4
LT		 3314 };
3315
0e574af1 3316 nfs_fattr_init(fsstat->fattr);
7c513058 3317 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3318}
3319
3320static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3321{
3322 struct nfs4_exception exception = { };
3323 int err;
3324 do {
3325 err = nfs4_handle_exception(server,
3326 _nfs4_proc_statfs(server, fhandle, fsstat),
3327 &exception);
3328 } while (exception.retry);
3329 return err;
3330}
3331
3332static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3333 struct nfs_fsinfo *fsinfo)
3334{
3335 struct nfs4_fsinfo_arg args = {
3336 .fh = fhandle,
3337 .bitmask = server->attr_bitmask,
3338 };
3dda5e43
BH		 3339 struct nfs4_fsinfo_res res = {
3340 .fsinfo = fsinfo,
3341 };
1da177e4
LT		 3342 struct rpc_message msg = {
3343 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3344 .rpc_argp = &args,
3dda5e43 3345 .rpc_resp = &res,
1da177e4
LT		 3346 };
3347
7c513058 3348 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3349}
3350
3351static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3352{
3353 struct nfs4_exception exception = { };
3354 int err;
3355
3356 do {
3357 err = nfs4_handle_exception(server,
3358 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3359 &exception);
3360 } while (exception.retry);
3361 return err;
3362}
3363
3364static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3365{
e38eb650
BS		 3366 int error;
3367
0e574af1 3368 nfs_fattr_init(fsinfo->fattr);
e38eb650 3369 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3370 if (error == 0) {
3371 /* block layout checks this! */
3372 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3373 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3374 }
e38eb650
BS		 3375
3376 return error;
1da177e4
LT		 3377}
3378
3379static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3380 struct nfs_pathconf *pathconf)
3381{
3382 struct nfs4_pathconf_arg args = {
3383 .fh = fhandle,
3384 .bitmask = server->attr_bitmask,
3385 };
d45b2989
BH		 3386 struct nfs4_pathconf_res res = {
3387 .pathconf = pathconf,
3388 };
1da177e4
LT		 3389 struct rpc_message msg = {
3390 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3391 .rpc_argp = &args,
d45b2989 3392 .rpc_resp = &res,
1da177e4
LT		 3393 };
3394
3395 /* None of the pathconf attributes are mandatory to implement */
3396 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3397 memset(pathconf, 0, sizeof(*pathconf));
3398 return 0;
3399 }
3400
0e574af1 3401 nfs_fattr_init(pathconf->fattr);
7c513058 3402 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
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_exception exception = { };
3409 int err;
3410
3411 do {
3412 err = nfs4_handle_exception(server,
3413 _nfs4_proc_pathconf(server, fhandle, pathconf),
3414 &exception);
3415 } while (exception.retry);
3416 return err;
3417}
3418
d20581aa
BH		 3419void __nfs4_read_done_cb(struct nfs_read_data *data)
3420{
cd841605 3421 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3422}
3423
cbdabc7f 3424static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3425{
cd841605 3426 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3427
9e33bed5 3428 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3429 rpc_restart_call_prepare(task);
ec06c096 3430 return -EAGAIN;
1da177e4 3431 }
8850df99 3432
d20581aa 3433 __nfs4_read_done_cb(data);
1da177e4 3434 if (task->tk_status > 0)
ec06c096
TM		 3435 renew_lease(server, data->timestamp);
3436 return 0;
1da177e4
LT		 3437}
3438
cbdabc7f
AA		 3439static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3440{
3441
3442 dprintk("--> %s\n", __func__);
3443
3444 if (!nfs4_sequence_done(task, &data->res.seq_res))
3445 return -EAGAIN;
3446
d20581aa
BH		 3447 return data->read_done_cb ? data->read_done_cb(task, data) :
3448 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3449}
3450
bdc7f021 3451static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3452{
1da177e4 3453 data->timestamp = jiffies;
cbdabc7f 3454 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3455 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3456 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3457}
3458
ea7c3303
BS		 3459static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3460{
cd841605 3461 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
ea7c3303
BS		 3462 &data->args.seq_args,
3463 &data->res.seq_res,
3464 task))
3465 return;
3466 rpc_call_start(task);
1da177e4
LT		 3467}
3468
b029bc9b 3469static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3470{
cd841605 3471 struct inode *inode = data->header->inode;
1da177e4 3472
9e33bed5 3473 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3474 rpc_restart_call_prepare(task);
788e7a89 3475 return -EAGAIN;
1da177e4 3476 }
4f9838c7 3477 if (task->tk_status >= 0) {
1da177e4 3478 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3479 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3480 }
788e7a89 3481 return 0;
1da177e4
LT		 3482}
3483
b029bc9b
FI		 3484static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3485{
3486 if (!nfs4_sequence_done(task, &data->res.seq_res))
3487 return -EAGAIN;
d20581aa
BH		 3488 return data->write_done_cb ? data->write_done_cb(task, data) :
3489 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3490}
3491
5a37f851
TM		 3492static
3493bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3494{
5a37f851
TM		 3495 const struct nfs_pgio_header *hdr = data->header;
3496
3497 /* Don't request attributes for pNFS or O_DIRECT writes */
3498 if (data->ds_clp != NULL || hdr->dreq != NULL)
3499 return false;
3500 /* Otherwise, request attributes if and only if we don't hold
3501 * a delegation
3502 */
011e2a7f 3503 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3504}
a69aef14 3505
bdc7f021 3506static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3507{
cd841605 3508 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3509
5a37f851 3510 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3511 data->args.bitmask = NULL;
3512 data->res.fattr = NULL;
3513 } else
3514 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3515
b029bc9b
FI		 3516 if (!data->write_done_cb)
3517 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3518 data->res.server = server;
1da177e4
LT		 3519 data->timestamp = jiffies;
3520
bdc7f021 3521 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3522 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3523}
3524
c6cb80d0
BS		 3525static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3526{
cd841605 3527 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
c6cb80d0
BS		 3528 &data->args.seq_args,
3529 &data->res.seq_res,
3530 task))
3531 return;
3532 rpc_call_start(task);
1da177e4
LT		 3533}
3534
0b7c0153 3535static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0
BS		 3536{
3537 if (nfs4_setup_sequence(NFS_SERVER(data->inode),
3538 &data->args.seq_args,
3539 &data->res.seq_res,
3540 task))
3541 return;
3542 rpc_call_start(task);
1da177e4
LT		 3543}
3544
0b7c0153 3545static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3546{
1da177e4 3547 struct inode *inode = data->inode;
14516c3a 3548
9e33bed5 3549 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3550 rpc_restart_call_prepare(task);
788e7a89 3551 return -EAGAIN;
1da177e4 3552 }
788e7a89 3553 return 0;
1da177e4
LT		 3554}
3555
0b7c0153 3556static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3557{
3558 if (!nfs4_sequence_done(task, &data->res.seq_res))
3559 return -EAGAIN;
0b7c0153 3560 return data->commit_done_cb(task, data);
5f452431
FI		 3561}
3562
0b7c0153 3563static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3564{
788e7a89 3565 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3566
0b7c0153
FI		 3567 if (data->commit_done_cb == NULL)
3568 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3569 data->res.server = server;
bdc7f021 3570 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3571 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3572}
3573
9bc4e3ca
CL		 3574struct nfs4_renewdata {
3575 struct nfs_client *client;
3576 unsigned long timestamp;
3577};
3578
1da177e4
LT		 3579/*
3580 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3581 * standalone procedure for queueing an asynchronous RENEW.
3582 */
9bc4e3ca 3583static void nfs4_renew_release(void *calldata)
dc96aef9 3584{
9bc4e3ca
CL		 3585 struct nfs4_renewdata *data = calldata;
3586 struct nfs_client *clp = data->client;
dc96aef9 3587
0851de06
AB		 3588 if (atomic_read(&clp->cl_count) > 1)
3589 nfs4_schedule_state_renewal(clp);
3590 nfs_put_client(clp);
9bc4e3ca 3591 kfree(data);
dc96aef9
AB		 3592}
3593
9bc4e3ca 3594static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3595{
9bc4e3ca
CL		 3596 struct nfs4_renewdata *data = calldata;
3597 struct nfs_client *clp = data->client;
3598 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3599
3600 if (task->tk_status < 0) {
95baa25c 3601 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3602 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3603 return;
3604 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3605 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3606 return;
3607 }
3608 nfs4_schedule_path_down_recovery(clp);
1da177e4 3609 }
452e9352 3610 do_renew_lease(clp, timestamp);
1da177e4
LT		 3611}
3612
963d8fe5
TM		 3613static const struct rpc_call_ops nfs4_renew_ops = {
3614 .rpc_call_done = nfs4_renew_done,
dc96aef9 3615 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3616};
3617
2f60ea6b 3618static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3619{
3620 struct rpc_message msg = {
3621 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3622 .rpc_argp = clp,
b4454fe1 3623 .rpc_cred = cred,
1da177e4 3624 };
9bc4e3ca 3625 struct nfs4_renewdata *data;
1da177e4 3626
2f60ea6b
TM		 3627 if (renew_flags == 0)
3628 return 0;
0851de06
AB		 3629 if (!atomic_inc_not_zero(&clp->cl_count))
3630 return -EIO;
b569ad34 3631 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3632 if (data == NULL)
3633 return -ENOMEM;
3634 data->client = clp;
3635 data->timestamp = jiffies;
1da177e4 3636 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3637 &nfs4_renew_ops, data);
1da177e4
LT		 3638}
3639
8534d4ec 3640static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3641{
3642 struct rpc_message msg = {
3643 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3644 .rpc_argp = clp,
b4454fe1 3645 .rpc_cred = cred,
1da177e4
LT		 3646 };
3647 unsigned long now = jiffies;
3648 int status;
3649
3650 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3651 if (status < 0)
3652 return status;
452e9352 3653 do_renew_lease(clp, now);
1da177e4
LT		 3654 return 0;
3655}
3656
aa1870af
BF		 3657static inline int nfs4_server_supports_acls(struct nfs_server *server)
3658{
3659 return (server->caps & NFS_CAP_ACLS)
3660 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3661 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3662}
3663
21f498c2
TM		 3664/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3665 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3666 * the stack.
3667 */
21f498c2 3668#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3669
e9e3d724
NH		 3670static int buf_to_pages_noslab(const void *buf, size_t buflen,
3671 struct page **pages, unsigned int *pgbase)
3672{
3673 struct page *newpage, **spages;
3674 int rc = 0;
3675 size_t len;
3676 spages = pages;
3677
3678 do {
21f498c2 3679 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3680 newpage = alloc_page(GFP_KERNEL);
3681
3682 if (newpage == NULL)
3683 goto unwind;
3684 memcpy(page_address(newpage), buf, len);
3685 buf += len;
3686 buflen -= len;
3687 *pages++ = newpage;
3688 rc++;
3689 } while (buflen != 0);
3690
3691 return rc;
3692
3693unwind:
3694 for(; rc > 0; rc--)
3695 __free_page(spages[rc-1]);
3696 return -ENOMEM;
3697}
3698
e50a1c2e
BF		 3699struct nfs4_cached_acl {
3700 int cached;
3701 size_t len;
3e9d4154 3702 char data[0];
e50a1c2e
BF		 3703};
3704
3705static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3706{
3707 struct nfs_inode *nfsi = NFS_I(inode);
3708
3709 spin_lock(&inode->i_lock);
3710 kfree(nfsi->nfs4_acl);
3711 nfsi->nfs4_acl = acl;
3712 spin_unlock(&inode->i_lock);
3713}
3714
3715static void nfs4_zap_acl_attr(struct inode *inode)
3716{
3717 nfs4_set_cached_acl(inode, NULL);
3718}
3719
3720static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3721{
3722 struct nfs_inode *nfsi = NFS_I(inode);
3723 struct nfs4_cached_acl *acl;
3724 int ret = -ENOENT;
3725
3726 spin_lock(&inode->i_lock);
3727 acl = nfsi->nfs4_acl;
3728 if (acl == NULL)
3729 goto out;
3730 if (buf == NULL) /* user is just asking for length */
3731 goto out_len;
3732 if (acl->cached == 0)
3733 goto out;
3734 ret = -ERANGE; /* see getxattr(2) man page */
3735 if (acl->len > buflen)
3736 goto out;
3737 memcpy(buf, acl->data, acl->len);
3738out_len:
3739 ret = acl->len;
3740out:
3741 spin_unlock(&inode->i_lock);
3742 return ret;
3743}
3744
5794d21e 3745static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3746{
3747 struct nfs4_cached_acl *acl;
b291f1b1 3748 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3749
1f1ea6c2 3750 if (buflen <= PAGE_SIZE) {
b291f1b1 3751 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3752 if (acl == NULL)
3753 goto out;
3754 acl->cached = 1;
5794d21e 3755 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3756 } else {
3757 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3758 if (acl == NULL)
3759 goto out;
3760 acl->cached = 0;
3761 }
3762 acl->len = acl_len;
3763out:
3764 nfs4_set_cached_acl(inode, acl);
3765}
3766
bf118a34
AA		 3767/*
3768 * The getxattr API returns the required buffer length when called with a
3769 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3770 * the required buf. On a NULL buf, we send a page of data to the server
3771 * guessing that the ACL request can be serviced by a page. If so, we cache
3772 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3773 * the cache. If not so, we throw away the page, and cache the required
3774 * length. The next getxattr call will then produce another round trip to
3775 * the server, this time with the input buf of the required size.
3776 */
16b4289c 3777static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3778{
bf118a34 3779 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3780 struct nfs_getaclargs args = {
3781 .fh = NFS_FH(inode),
3782 .acl_pages = pages,
3783 .acl_len = buflen,
3784 };
663c79b3
BH		 3785 struct nfs_getaclres res = {
3786 .acl_len = buflen,
3787 };
aa1870af
BF		 3788 struct rpc_message msg = {
3789 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3790 .rpc_argp = &args,
663c79b3 3791 .rpc_resp = &res,
aa1870af 3792 };
21f498c2
TM		 3793 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3794 int ret = -ENOMEM, i;
aa1870af 3795
bf118a34
AA		 3796 /* As long as we're doing a round trip to the server anyway,
3797 * let's be prepared for a page of acl data. */
3798 if (npages == 0)
3799 npages = 1;
21f498c2
TM		 3800 if (npages > ARRAY_SIZE(pages))
3801 return -ERANGE;
5a006899 3802
bf118a34
AA		 3803 for (i = 0; i < npages; i++) {
3804 pages[i] = alloc_page(GFP_KERNEL);
3805 if (!pages[i])
3806 goto out_free;
e50a1c2e 3807 }
5a006899
SP		 3808
3809 /* for decoding across pages */
3810 res.acl_scratch = alloc_page(GFP_KERNEL);
3811 if (!res.acl_scratch)
3812 goto out_free;
3813
bf118a34
AA		 3814 args.acl_len = npages * PAGE_SIZE;
3815 args.acl_pgbase = 0;
5a006899 3816
de040bec 3817 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3818 __func__, buf, buflen, npages, args.acl_len);
3819 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3820 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3821 if (ret)
3822 goto out_free;
bf118a34 3823
1f1ea6c2
TM		 3824 /* Handle the case where the passed-in buffer is too short */
3825 if (res.acl_flags & NFS4_ACL_TRUNC) {
3826 /* Did the user only issue a request for the acl length? */
3827 if (buf == NULL)
3828 goto out_ok;
e50a1c2e 3829 ret = -ERANGE;
1f1ea6c2 3830 goto out_free;
e50a1c2e 3831 }
1f1ea6c2
TM		 3832 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
3833 if (buf)
3834 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
3835out_ok:
3836 ret = res.acl_len;
e50a1c2e 3837out_free:
bf118a34
AA		 3838 for (i = 0; i < npages; i++)
3839 if (pages[i])
3840 __free_page(pages[i]);
331818f1
TM		 3841 if (res.acl_scratch)
3842 __free_page(res.acl_scratch);
aa1870af
BF		 3843 return ret;
3844}
3845
16b4289c
TM		 3846static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3847{
3848 struct nfs4_exception exception = { };
3849 ssize_t ret;
3850 do {
3851 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3852 if (ret >= 0)
3853 break;
3854 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3855 } while (exception.retry);
3856 return ret;
3857}
3858
e50a1c2e
BF		 3859static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3860{
3861 struct nfs_server *server = NFS_SERVER(inode);
3862 int ret;
3863
3864 if (!nfs4_server_supports_acls(server))
3865 return -EOPNOTSUPP;
3866 ret = nfs_revalidate_inode(server, inode);
3867 if (ret < 0)
3868 return ret;
08a22b39
AK		 3869 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3870 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3871 ret = nfs4_read_cached_acl(inode, buf, buflen);
3872 if (ret != -ENOENT)
bf118a34
AA		 3873 /* -ENOENT is returned if there is no ACL or if there is an ACL
3874 * but no cached acl data, just the acl length */
e50a1c2e
BF		 3875 return ret;
3876 return nfs4_get_acl_uncached(inode, buf, buflen);
3877}
3878
16b4289c 3879static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3880{
3881 struct nfs_server *server = NFS_SERVER(inode);
3882 struct page *pages[NFS4ACL_MAXPAGES];
3883 struct nfs_setaclargs arg = {
3884 .fh = NFS_FH(inode),
3885 .acl_pages = pages,
3886 .acl_len = buflen,
3887 };
73c403a9 3888 struct nfs_setaclres res;
4b580ee3
BF		 3889 struct rpc_message msg = {
3890 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3891 .rpc_argp = &arg,
73c403a9 3892 .rpc_resp = &res,
4b580ee3 3893 };
21f498c2 3894 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 3895 int ret, i;
4b580ee3
BF		 3896
3897 if (!nfs4_server_supports_acls(server))
3898 return -EOPNOTSUPP;
21f498c2
TM		 3899 if (npages > ARRAY_SIZE(pages))
3900 return -ERANGE;
e9e3d724
NH		 3901 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3902 if (i < 0)
3903 return i;
57ec14c5 3904 nfs4_inode_return_delegation(inode);
7c513058 3905 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3906
3907 /*
3908 * Free each page after tx, so the only ref left is
3909 * held by the network stack
3910 */
3911 for (; i > 0; i--)
3912 put_page(pages[i-1]);
3913
08a22b39
AK		 3914 /*
3915 * Acl update can result in inode attribute update.
3916 * so mark the attribute cache invalid.
3917 */
3918 spin_lock(&inode->i_lock);
3919 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3920 spin_unlock(&inode->i_lock);
f41f7418
TM		 3921 nfs_access_zap_cache(inode);
3922 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3923 return ret;
3924}
3925
16b4289c
TM		 3926static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3927{
3928 struct nfs4_exception exception = { };
3929 int err;
3930 do {
3931 err = nfs4_handle_exception(NFS_SERVER(inode),
3932 __nfs4_proc_set_acl(inode, buf, buflen),
3933 &exception);
3934 } while (exception.retry);
3935 return err;
3936}
3937
1da177e4 3938static int
aa5190d0 3939nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3940{
aa5190d0
TM		 3941 struct nfs_client *clp = server->nfs_client;
3942
3943 if (task->tk_status >= 0)
1da177e4
LT		 3944 return 0;
3945 switch(task->tk_status) {
a1d0b5ee 3946 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 3947 case -NFS4ERR_ADMIN_REVOKED:
3948 case -NFS4ERR_BAD_STATEID:
14977489
TM		 3949 if (state == NULL)
3950 break;
3951 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 3952 case -NFS4ERR_OPENMODE:
3953 if (state == NULL)
3954 break;
0400a6b0
TM		 3955 nfs4_schedule_stateid_recovery(server, state);
3956 goto wait_on_recovery;
0ced63d1
TM		 3957 case -NFS4ERR_EXPIRED:
3958 if (state != NULL)
3959 nfs4_schedule_stateid_recovery(server, state);
1da177e4 3960 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3961 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 3962 nfs4_schedule_lease_recovery(clp);
3963 goto wait_on_recovery;
4745e315
AA		 3964#if defined(CONFIG_NFS_V4_1)
3965 case -NFS4ERR_BADSESSION:
3966 case -NFS4ERR_BADSLOT:
3967 case -NFS4ERR_BAD_HIGH_SLOT:
3968 case -NFS4ERR_DEADSESSION:
3969 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3970 case -NFS4ERR_SEQ_FALSE_RETRY:
3971 case -NFS4ERR_SEQ_MISORDERED:
3972 dprintk("%s ERROR %d, Reset session\n", __func__,
3973 task->tk_status);
9f594791 3974 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 3975 task->tk_status = 0;
3976 return -EAGAIN;
3977#endif /* CONFIG_NFS_V4_1 */
1da177e4 3978 case -NFS4ERR_DELAY:
aa5190d0 3979 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3980 case -NFS4ERR_GRACE:
2c643488 3981 case -EKEYEXPIRED:
1da177e4
LT		 3982 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3983 task->tk_status = 0;
3984 return -EAGAIN;
a8a4ae3a 3985 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 3986 case -NFS4ERR_OLD_STATEID:
3987 task->tk_status = 0;
3988 return -EAGAIN;
3989 }
3990 task->tk_status = nfs4_map_errors(task->tk_status);
3991 return 0;
0400a6b0 3992wait_on_recovery:
a2c0b9e2 3993 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 3994 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3995 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3996 task->tk_status = 0;
3997 return -EAGAIN;
1da177e4
LT		 3998}
3999
f092075d
CL		 4000static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4001 nfs4_verifier *bootverf)
cd93710e
CL		 4002{
4003 __be32 verf[2];
4004
2c820d9a
CL		 4005 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4006 /* An impossible timestamp guarantees this value
4007 * will never match a generated boot time. */
4008 verf[0] = 0;
4009 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4010 } else {
f092075d
CL		 4011 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4012 verf[0] = (__be32)nn->boot_time.tv_sec;
4013 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4014 }
cd93710e
CL		 4015 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4016}
4017
e984a55a
CL		 4018static unsigned int
4019nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4020 char *buf, size_t len)
4021{
4022 unsigned int result;
4023
4024 rcu_read_lock();
4025 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4026 clp->cl_ipaddr,
4027 rpc_peeraddr2str(clp->cl_rpcclient,
4028 RPC_DISPLAY_ADDR),
4029 rpc_peeraddr2str(clp->cl_rpcclient,
4030 RPC_DISPLAY_PROTO));
4031 rcu_read_unlock();
4032 return result;
4033}
4034
4035static unsigned int
4036nfs4_init_uniform_client_string(const struct nfs_client *clp,
4037 char *buf, size_t len)
4038{
6f2ea7f2
CL		 4039 char *nodename = clp->cl_rpcclient->cl_nodename;
4040
4041 if (nfs4_client_id_uniquifier[0] != '\0')
4042 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4043 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4044 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4045 nodename);
e984a55a
CL		 4046}
4047
6bbb4ae8
CL		 4048/**
4049 * nfs4_proc_setclientid - Negotiate client ID
4050 * @clp: state data structure
4051 * @program: RPC program for NFSv4 callback service
4052 * @port: IP port number for NFS4 callback service
4053 * @cred: RPC credential to use for this call
4054 * @res: where to place the result
4055 *
4056 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4057 */
bb8b27e5
TM		 4058int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4059 unsigned short port, struct rpc_cred *cred,
4060 struct nfs4_setclientid_res *res)
1da177e4
LT		 4061{
4062 nfs4_verifier sc_verifier;
4063 struct nfs4_setclientid setclientid = {
4064 .sc_verifier = &sc_verifier,
4065 .sc_prog = program,
f4eecd5d 4066 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4067 };
4068 struct rpc_message msg = {
4069 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4070 .rpc_argp = &setclientid,
bb8b27e5 4071 .rpc_resp = res,
286d7d6a 4072 .rpc_cred = cred,
1da177e4 4073 };
6bbb4ae8 4074 int status;
1da177e4 4075
de734831 4076 /* nfs_client_id4 */
f092075d 4077 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4078 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4079 setclientid.sc_name_len =
4080 nfs4_init_uniform_client_string(clp,
4081 setclientid.sc_name,
4082 sizeof(setclientid.sc_name));
4083 else
4084 setclientid.sc_name_len =
4085 nfs4_init_nonuniform_client_string(clp,
4086 setclientid.sc_name,
4087 sizeof(setclientid.sc_name));
de734831 4088 /* cb_client4 */
e984a55a 4089 rcu_read_lock();
de734831 4090 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4091 sizeof(setclientid.sc_netid),
4092 rpc_peeraddr2str(clp->cl_rpcclient,
4093 RPC_DISPLAY_NETID));
de734831
CL		 4094 rcu_read_unlock();
4095 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4096 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4097 clp->cl_ipaddr, port >> 8, port & 255);
4098
6bbb4ae8
CL		 4099 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4100 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4101 setclientid.sc_name_len, setclientid.sc_name);
4102 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4103 dprintk("NFS reply setclientid: %d\n", status);
4104 return status;
1da177e4
LT		 4105}
4106
6bbb4ae8
CL		 4107/**
4108 * nfs4_proc_setclientid_confirm - Confirm client ID
4109 * @clp: state data structure
4110 * @res: result of a previous SETCLIENTID
4111 * @cred: RPC credential to use for this call
4112 *
4113 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4114 */
fd954ae1 4115int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4116 struct nfs4_setclientid_res *arg,
4117 struct rpc_cred *cred)
1da177e4
LT		 4118{
4119 struct nfs_fsinfo fsinfo;
4120 struct rpc_message msg = {
4121 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4122 .rpc_argp = arg,
1da177e4 4123 .rpc_resp = &fsinfo,
286d7d6a 4124 .rpc_cred = cred,
1da177e4
LT		 4125 };
4126 unsigned long now;
4127 int status;
4128
6bbb4ae8
CL		 4129 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4130 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4131 clp->cl_clientid);
1da177e4 4132 now = jiffies;
1bd714f2 4133 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4134 if (status == 0) {
4135 spin_lock(&clp->cl_lock);
4136 clp->cl_lease_time = fsinfo.lease_time * HZ;
4137 clp->cl_last_renewal = now;
4138 spin_unlock(&clp->cl_lock);
4139 }
6bbb4ae8 4140 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4141 return status;
4142}
4143
fe650407
TM		 4144struct nfs4_delegreturndata {
4145 struct nfs4_delegreturnargs args;
fa178f29 4146 struct nfs4_delegreturnres res;
fe650407
TM		 4147 struct nfs_fh fh;
4148 nfs4_stateid stateid;
26e976a8 4149 unsigned long timestamp;
fa178f29 4150 struct nfs_fattr fattr;
fe650407
TM		 4151 int rpc_status;
4152};
4153
fe650407
TM		 4154static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4155{
4156 struct nfs4_delegreturndata *data = calldata;
938e1010 4157
14516c3a
TM		 4158 if (!nfs4_sequence_done(task, &data->res.seq_res))
4159 return;
938e1010 4160
79708861
RL		 4161 switch (task->tk_status) {
4162 case -NFS4ERR_STALE_STATEID:
4163 case -NFS4ERR_EXPIRED:
4164 case 0:
fa178f29 4165 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4166 break;
4167 default:
4168 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4169 -EAGAIN) {
d00c5d43 4170 rpc_restart_call_prepare(task);
79708861
RL		 4171 return;
4172 }
4173 }
4174 data->rpc_status = task->tk_status;
fe650407
TM		 4175}
4176
4177static void nfs4_delegreturn_release(void *calldata)
4178{
fe650407
TM		 4179 kfree(calldata);
4180}
4181
938e1010
AA		 4182#if defined(CONFIG_NFS_V4_1)
4183static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4184{
4185 struct nfs4_delegreturndata *d_data;
4186
4187 d_data = (struct nfs4_delegreturndata *)data;
4188
035168ab 4189 if (nfs4_setup_sequence(d_data->res.server,
938e1010 4190 &d_data->args.seq_args,
9d12b216 4191 &d_data->res.seq_res, task))
938e1010
AA		 4192 return;
4193 rpc_call_start(task);
4194}
4195#endif /* CONFIG_NFS_V4_1 */
4196
c8d149f3 4197static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4198#if defined(CONFIG_NFS_V4_1)
4199 .rpc_call_prepare = nfs4_delegreturn_prepare,
4200#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4201 .rpc_call_done = nfs4_delegreturn_done,
4202 .rpc_release = nfs4_delegreturn_release,
4203};
4204
e6f81075 4205static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4206{
4207 struct nfs4_delegreturndata *data;
fa178f29 4208 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4209 struct rpc_task *task;
5138fde0
TM		 4210 struct rpc_message msg = {
4211 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4212 .rpc_cred = cred,
4213 };
c970aa85
TM		 4214 struct rpc_task_setup task_setup_data = {
4215 .rpc_client = server->client,
5138fde0 4216 .rpc_message = &msg,
c970aa85
TM		 4217 .callback_ops = &nfs4_delegreturn_ops,
4218 .flags = RPC_TASK_ASYNC,
4219 };
e6f81075 4220 int status = 0;
fe650407 4221
8535b2be 4222 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4223 if (data == NULL)
4224 return -ENOMEM;
9d12b216 4225 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4226 data->args.fhandle = &data->fh;
4227 data->args.stateid = &data->stateid;
9e907fec 4228 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4229 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4230 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4231 data->res.fattr = &data->fattr;
4232 data->res.server = server;
5138fde0 4233 nfs_fattr_init(data->res.fattr);
26e976a8 4234 data->timestamp = jiffies;
fe650407
TM		 4235 data->rpc_status = 0;
4236
c970aa85 4237 task_setup_data.callback_data = data;
1174dd1f
TM		 4238 msg.rpc_argp = &data->args;
4239 msg.rpc_resp = &data->res;
c970aa85 4240 task = rpc_run_task(&task_setup_data);
7a1218a2 4241 if (IS_ERR(task))
fe650407 4242 return PTR_ERR(task);
e6f81075
TM		 4243 if (!issync)
4244 goto out;
fe650407 4245 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4246 if (status != 0)
4247 goto out;
4248 status = data->rpc_status;
e144cbcc
TM		 4249 if (status == 0)
4250 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4251 else
4252 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4253out:
e6b3c4db 4254 rpc_put_task(task);
fe650407 4255 return status;
1da177e4
LT		 4256}
4257
e6f81075 4258int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4259{
4260 struct nfs_server *server = NFS_SERVER(inode);
4261 struct nfs4_exception exception = { };
4262 int err;
4263 do {
e6f81075 4264 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4265 switch (err) {
4266 case -NFS4ERR_STALE_STATEID:
4267 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4268 case 0:
4269 return 0;
4270 }
4271 err = nfs4_handle_exception(server, err, &exception);
4272 } while (exception.retry);
4273 return err;
4274}
4275
4276#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4277#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4278
4279/*
4280 * sleep, with exponential backoff, and retry the LOCK operation.
4281 */
4282static unsigned long
4283nfs4_set_lock_task_retry(unsigned long timeout)
4284{
d310310c 4285 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4286 timeout <<= 1;
4287 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4288 return NFS4_LOCK_MAXTIMEOUT;
4289 return timeout;
4290}
4291
1da177e4
LT		 4292static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4293{
4294 struct inode *inode = state->inode;
4295 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4296 struct nfs_client *clp = server->nfs_client;
911d1aaf 4297 struct nfs_lockt_args arg = {
1da177e4 4298 .fh = NFS_FH(inode),
911d1aaf 4299 .fl = request,
1da177e4 4300 };
911d1aaf
TM		 4301 struct nfs_lockt_res res = {
4302 .denied = request,
1da177e4
LT		 4303 };
4304 struct rpc_message msg = {
4305 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4306 .rpc_argp = &arg,
4307 .rpc_resp = &res,
4308 .rpc_cred = state->owner->so_cred,
4309 };
1da177e4
LT		 4310 struct nfs4_lock_state *lsp;
4311 int status;
4312
911d1aaf 4313 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4314 status = nfs4_set_lock_state(state, request);
4315 if (status != 0)
4316 goto out;
4317 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4318 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4319 arg.lock_owner.s_dev = server->s_dev;
7c513058 4320 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4321 switch (status) {
4322 case 0:
4323 request->fl_type = F_UNLCK;
4324 break;
4325 case -NFS4ERR_DENIED:
4326 status = 0;
1da177e4 4327 }
70cc6487 4328 request->fl_ops->fl_release_private(request);
8d0a8a9d 4329out:
1da177e4
LT		 4330 return status;
4331}
4332
4333static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4334{
4335 struct nfs4_exception exception = { };
4336 int err;
4337
4338 do {
4339 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4340 _nfs4_proc_getlk(state, cmd, request),
4341 &exception);
4342 } while (exception.retry);
4343 return err;
4344}
4345
4346static int do_vfs_lock(struct file *file, struct file_lock *fl)
4347{
4348 int res = 0;
4349 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4350 case FL_POSIX:
4351 res = posix_lock_file_wait(file, fl);
4352 break;
4353 case FL_FLOCK:
4354 res = flock_lock_file_wait(file, fl);
4355 break;
4356 default:
4357 BUG();
4358 }
1da177e4
LT		 4359 return res;
4360}
4361
faf5f49c 4362struct nfs4_unlockdata {
911d1aaf
TM		 4363 struct nfs_locku_args arg;
4364 struct nfs_locku_res res;
faf5f49c
TM		 4365 struct nfs4_lock_state *lsp;
4366 struct nfs_open_context *ctx;
911d1aaf
TM		 4367 struct file_lock fl;
4368 const struct nfs_server *server;
26e976a8 4369 unsigned long timestamp;
faf5f49c
TM		 4370};
4371
911d1aaf
TM		 4372static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4373 struct nfs_open_context *ctx,
4374 struct nfs4_lock_state *lsp,
4375 struct nfs_seqid *seqid)
4376{
4377 struct nfs4_unlockdata *p;
4378 struct inode *inode = lsp->ls_state->inode;
4379
8535b2be 4380 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4381 if (p == NULL)
4382 return NULL;
4383 p->arg.fh = NFS_FH(inode);
4384 p->arg.fl = &p->fl;
4385 p->arg.seqid = seqid;
c1d51931 4386 p->res.seqid = seqid;
911d1aaf
TM		 4387 p->arg.stateid = &lsp->ls_stateid;
4388 p->lsp = lsp;
4389 atomic_inc(&lsp->ls_count);
4390 /* Ensure we don't close file until we're done freeing locks! */
4391 p->ctx = get_nfs_open_context(ctx);
4392 memcpy(&p->fl, fl, sizeof(p->fl));
4393 p->server = NFS_SERVER(inode);
4394 return p;
4395}
4396
06f814a3 4397static void nfs4_locku_release_calldata(void *data)
faf5f49c 4398{
963d8fe5 4399 struct nfs4_unlockdata *calldata = data;
911d1aaf 4400 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4401 nfs4_put_lock_state(calldata->lsp);
4402 put_nfs_open_context(calldata->ctx);
4403 kfree(calldata);
faf5f49c
TM		 4404}
4405
963d8fe5 4406static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4407{
963d8fe5 4408 struct nfs4_unlockdata *calldata = data;
faf5f49c 4409
14516c3a
TM		 4410 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4411 return;
faf5f49c
TM		 4412 switch (task->tk_status) {
4413 case 0:
f597c537
TM		 4414 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4415 &calldata->res.stateid);
26e976a8 4416 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4417 break;
9e33bed5
TM		 4418 case -NFS4ERR_BAD_STATEID:
4419 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4420 case -NFS4ERR_STALE_STATEID:
4421 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4422 break;
4423 default:
9e33bed5 4424 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4425 rpc_restart_call_prepare(task);
faf5f49c 4426 }
2b1bc308 4427 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4428}
4429
4ce70ada 4430static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4431{
4ce70ada 4432 struct nfs4_unlockdata *calldata = data;
faf5f49c 4433
911d1aaf 4434 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c 4435 return;
795a88c9 4436 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5
TM		 4437 /* Note: exit _without_ running nfs4_locku_done */
4438 task->tk_action = NULL;
faf5f49c
TM		 4439 return;
4440 }
26e976a8 4441 calldata->timestamp = jiffies;
035168ab 4442 if (nfs4_setup_sequence(calldata->server,
a893693c 4443 &calldata->arg.seq_args,
2240a9e2
TM		 4444 &calldata->res.seq_res,
4445 task) != 0)
4446 nfs_release_seqid(calldata->arg.seqid);
4447 else
4448 rpc_call_start(task);
faf5f49c
TM		 4449}
4450
963d8fe5 4451static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4452 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4453 .rpc_call_done = nfs4_locku_done,
06f814a3 4454 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4455};
4456
a5d16a4d
TM		 4457static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4458 struct nfs_open_context *ctx,
4459 struct nfs4_lock_state *lsp,
4460 struct nfs_seqid *seqid)
4461{
4462 struct nfs4_unlockdata *data;
5138fde0
TM		 4463 struct rpc_message msg = {
4464 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4465 .rpc_cred = ctx->cred,
4466 };
c970aa85
TM		 4467 struct rpc_task_setup task_setup_data = {
4468 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4469 .rpc_message = &msg,
c970aa85 4470 .callback_ops = &nfs4_locku_ops,
101070ca 4471 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4472 .flags = RPC_TASK_ASYNC,
4473 };
a5d16a4d 4474
137d6aca
FF		 4475 /* Ensure this is an unlock - when canceling a lock, the
4476 * canceled lock is passed in, and it won't be an unlock.
4477 */
4478 fl->fl_type = F_UNLCK;
4479
a5d16a4d
TM		 4480 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4481 if (data == NULL) {
4482 nfs_free_seqid(seqid);
4483 return ERR_PTR(-ENOMEM);
4484 }
4485
9d12b216 4486 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4487 msg.rpc_argp = &data->arg;
4488 msg.rpc_resp = &data->res;
c970aa85
TM		 4489 task_setup_data.callback_data = data;
4490 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4491}
4492
faf5f49c
TM		 4493static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4494{
19e03c57 4495 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4496 struct nfs_seqid *seqid;
1da177e4 4497 struct nfs4_lock_state *lsp;
06f814a3
TM		 4498 struct rpc_task *task;
4499 int status = 0;
536ff0f8 4500 unsigned char fl_flags = request->fl_flags;
faf5f49c 4501
8d0a8a9d 4502 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4503 /* Unlock _before_ we do the RPC call */
4504 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4505 down_read(&nfsi->rwsem);
4506 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4507 up_read(&nfsi->rwsem);
9b073574 4508 goto out;
19e03c57
TM		 4509 }
4510 up_read(&nfsi->rwsem);
8d0a8a9d 4511 if (status != 0)
9b073574
TM		 4512 goto out;
4513 /* Is this a delegated lock? */
4514 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4515 goto out;
8d0a8a9d 4516 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4517 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4518 status = -ENOMEM;
911d1aaf 4519 if (seqid == NULL)
9b073574 4520 goto out;
cd3758e3 4521 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4522 status = PTR_ERR(task);
4523 if (IS_ERR(task))
9b073574 4524 goto out;
a5d16a4d 4525 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4526 rpc_put_task(task);
9b073574 4527out:
536ff0f8 4528 request->fl_flags = fl_flags;
1da177e4
LT		 4529 return status;
4530}
4531
a5d16a4d
TM		 4532struct nfs4_lockdata {
4533 struct nfs_lock_args arg;
4534 struct nfs_lock_res res;
4535 struct nfs4_lock_state *lsp;
4536 struct nfs_open_context *ctx;
4537 struct file_lock fl;
26e976a8 4538 unsigned long timestamp;
a5d16a4d
TM		 4539 int rpc_status;
4540 int cancelled;
66179efe 4541 struct nfs_server *server;
a5d16a4d
TM		 4542};
4543
4544static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4545 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4546 gfp_t gfp_mask)
1da177e4 4547{
a5d16a4d
TM		 4548 struct nfs4_lockdata *p;
4549 struct inode *inode = lsp->ls_state->inode;
1da177e4 4550 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4551
8535b2be 4552 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4553 if (p == NULL)
4554 return NULL;
4555
4556 p->arg.fh = NFS_FH(inode);
4557 p->arg.fl = &p->fl;
8535b2be 4558 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4559 if (p->arg.open_seqid == NULL)
4560 goto out_free;
8535b2be 4561 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4562 if (p->arg.lock_seqid == NULL)
2f74c0a0 4563 goto out_free_seqid;
a5d16a4d 4564 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4565 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4566 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4567 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4568 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4569 p->lsp = lsp;
66179efe 4570 p->server = server;
a5d16a4d
TM		 4571 atomic_inc(&lsp->ls_count);
4572 p->ctx = get_nfs_open_context(ctx);
4573 memcpy(&p->fl, fl, sizeof(p->fl));
4574 return p;
2f74c0a0
TM		 4575out_free_seqid:
4576 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4577out_free:
4578 kfree(p);
4579 return NULL;
4580}
4581
4582static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4583{
4584 struct nfs4_lockdata *data = calldata;
4585 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4586
3110ff80 4587 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4588 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4589 return;
a5d16a4d
TM		 4590 /* Do we need to do an open_to_lock_owner? */
4591 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
e6e21970 4592 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0)
2240a9e2 4593 goto out_release_lock_seqid;
a5d16a4d
TM		 4594 data->arg.open_stateid = &state->stateid;
4595 data->arg.new_lock_owner = 1;
c1d51931 4596 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4597 } else
4598 data->arg.new_lock_owner = 0;
26e976a8 4599 data->timestamp = jiffies;
035168ab
TM		 4600 if (nfs4_setup_sequence(data->server,
4601 &data->arg.seq_args,
2240a9e2
TM		 4602 &data->res.seq_res,
4603 task) == 0) {
4604 rpc_call_start(task);
66179efe 4605 return;
2240a9e2
TM		 4606 }
4607 nfs_release_seqid(data->arg.open_seqid);
4608out_release_lock_seqid:
4609 nfs_release_seqid(data->arg.lock_seqid);
4610 dprintk("%s: done!, ret = %d\n", __func__, task->tk_status);
a5d16a4d
TM		 4611}
4612
b257957e
AB		 4613static void nfs4_recover_lock_prepare(struct rpc_task *task, void *calldata)
4614{
4615 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
4616 nfs4_lock_prepare(task, calldata);
4617}
4618
a5d16a4d
TM		 4619static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4620{
4621 struct nfs4_lockdata *data = calldata;
4622
3110ff80 4623 dprintk("%s: begin!\n", __func__);
a5d16a4d 4624
14516c3a
TM		 4625 if (!nfs4_sequence_done(task, &data->res.seq_res))
4626 return;
66179efe 4627
a5d16a4d 4628 data->rpc_status = task->tk_status;
a5d16a4d 4629 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4630 if (data->rpc_status == 0)
4631 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4632 else
4633 goto out;
4634 }
4635 if (data->rpc_status == 0) {
f597c537 4636 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4637 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4638 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4639 }
a5d16a4d 4640out:
3110ff80 4641 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4642}
4643
4644static void nfs4_lock_release(void *calldata)
4645{
4646 struct nfs4_lockdata *data = calldata;
4647
3110ff80 4648 dprintk("%s: begin!\n", __func__);
2f74c0a0 4649 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4650 if (data->cancelled != 0) {
4651 struct rpc_task *task;
4652 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4653 data->arg.lock_seqid);
4654 if (!IS_ERR(task))
bf294b41 4655 rpc_put_task_async(task);
3110ff80 4656 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4657 } else
4658 nfs_free_seqid(data->arg.lock_seqid);
4659 nfs4_put_lock_state(data->lsp);
4660 put_nfs_open_context(data->ctx);
4661 kfree(data);
3110ff80 4662 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4663}
4664
4665static const struct rpc_call_ops nfs4_lock_ops = {
4666 .rpc_call_prepare = nfs4_lock_prepare,
4667 .rpc_call_done = nfs4_lock_done,
4668 .rpc_release = nfs4_lock_release,
4669};
4670
b257957e
AB		 4671static const struct rpc_call_ops nfs4_recover_lock_ops = {
4672 .rpc_call_prepare = nfs4_recover_lock_prepare,
4673 .rpc_call_done = nfs4_lock_done,
4674 .rpc_release = nfs4_lock_release,
4675};
4676
2bee72a6
TM		 4677static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4678{
2bee72a6
TM		 4679 switch (error) {
4680 case -NFS4ERR_ADMIN_REVOKED:
4681 case -NFS4ERR_BAD_STATEID:
ecac799a 4682 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4683 if (new_lock_owner != 0 ||
795a88c9 4684 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4685 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4686 break;
4687 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4688 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4689 case -NFS4ERR_EXPIRED:
4690 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4691 };
4692}
4693
afe6c27c 4694static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4695{
4696 struct nfs4_lockdata *data;
4697 struct rpc_task *task;
5138fde0
TM		 4698 struct rpc_message msg = {
4699 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4700 .rpc_cred = state->owner->so_cred,
4701 };
c970aa85
TM		 4702 struct rpc_task_setup task_setup_data = {
4703 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4704 .rpc_message = &msg,
c970aa85 4705 .callback_ops = &nfs4_lock_ops,
101070ca 4706 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4707 .flags = RPC_TASK_ASYNC,
4708 };
a5d16a4d
TM		 4709 int ret;
4710
3110ff80 4711 dprintk("%s: begin!\n", __func__);
cd3758e3 4712 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4713 fl->fl_u.nfs4_fl.owner,
4714 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4715 if (data == NULL)
4716 return -ENOMEM;
4717 if (IS_SETLKW(cmd))
4718 data->arg.block = 1;
b257957e
AB		 4719 if (recovery_type > NFS_LOCK_NEW) {
4720 if (recovery_type == NFS_LOCK_RECLAIM)
afe6c27c 4721 data->arg.reclaim = NFS_LOCK_RECLAIM;
b257957e
AB		 4722 task_setup_data.callback_ops = &nfs4_recover_lock_ops;
4723 }
9d12b216 4724 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4725 msg.rpc_argp = &data->arg;
4726 msg.rpc_resp = &data->res;
c970aa85
TM		 4727 task_setup_data.callback_data = data;
4728 task = rpc_run_task(&task_setup_data);
7a1218a2 4729 if (IS_ERR(task))
a5d16a4d 4730 return PTR_ERR(task);
a5d16a4d
TM		 4731 ret = nfs4_wait_for_completion_rpc_task(task);
4732 if (ret == 0) {
4733 ret = data->rpc_status;
2bee72a6
TM		 4734 if (ret)
4735 nfs4_handle_setlk_error(data->server, data->lsp,
4736 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4737 } else
4738 data->cancelled = 1;
e6b3c4db 4739 rpc_put_task(task);
3110ff80 4740 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4741 return ret;
1da177e4
LT		 4742}
4743
4744static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4745{
202b50dc 4746 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4747 struct nfs4_exception exception = {
4748 .inode = state->inode,
4749 };
202b50dc
TM		 4750 int err;
4751
4752 do {
42a2d13e
TM		 4753 /* Cache the lock if possible... */
4754 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4755 return 0;
afe6c27c 4756 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4757 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4758 break;
4759 nfs4_handle_exception(server, err, &exception);
4760 } while (exception.retry);
4761 return err;
1da177e4
LT		 4762}
4763
4764static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4765{
202b50dc 4766 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4767 struct nfs4_exception exception = {
4768 .inode = state->inode,
4769 };
202b50dc
TM		 4770 int err;
4771
6bfc93ef
TM		 4772 err = nfs4_set_lock_state(state, request);
4773 if (err != 0)
4774 return err;
202b50dc 4775 do {
42a2d13e
TM		 4776 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4777 return 0;
afe6c27c 4778 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4779 switch (err) {
4780 default:
4781 goto out;
4782 case -NFS4ERR_GRACE:
4783 case -NFS4ERR_DELAY:
4784 nfs4_handle_exception(server, err, &exception);
4785 err = 0;
4786 }
202b50dc 4787 } while (exception.retry);
a9ed2e25 4788out:
202b50dc 4789 return err;
1da177e4
LT		 4790}
4791
f062eb6c 4792#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 4793/**
4794 * nfs41_check_expired_locks - possibly free a lock stateid
4795 *
4796 * @state: NFSv4 state for an inode
4797 *
4798 * Returns NFS_OK if recovery for this stateid is now finished.
4799 * Otherwise a negative NFS4ERR value is returned.
4800 */
b01dd1d8 4801static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4802{
eb64cf96 4803 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 4804 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4805 struct nfs_server *server = NFS_SERVER(state->inode);
4806
b01dd1d8 4807 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 4808 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 4809 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4810 if (status != NFS_OK) {
3e60ffdd
CL		 4811 /* Free the stateid unless the server
4812 * informs us the stateid is unrecognized. */
89af2739
CL		 4813 if (status != -NFS4ERR_BAD_STATEID)
4814 nfs41_free_stateid(server,
4815 &lsp->ls_stateid);
795a88c9 4816 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 4817 ret = status;
4818 }
4819 }
4820 };
4821
4822 return ret;
4823}
4824
4825static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4826{
4827 int status = NFS_OK;
4828
4829 if (test_bit(LK_STATE_IN_USE, &state->flags))
4830 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 4831 if (status != NFS_OK)
4832 status = nfs4_lock_expired(state, request);
4833 return status;
f062eb6c
BS		 4834}
4835#endif
4836
1da177e4
LT		 4837static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4838{
19e03c57 4839 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4840 unsigned char fl_flags = request->fl_flags;
8e469ebd 4841 int status = -ENOLCK;
1da177e4 4842
8e469ebd
TM		 4843 if ((fl_flags & FL_POSIX) &&
4844 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4845 goto out;
6bfc93ef 4846 /* Is this a delegated open? */
6bfc93ef
TM		 4847 status = nfs4_set_lock_state(state, request);
4848 if (status != 0)
4849 goto out;
01c3b861
TM		 4850 request->fl_flags |= FL_ACCESS;
4851 status = do_vfs_lock(request->fl_file, request);
4852 if (status < 0)
4853 goto out;
19e03c57 4854 down_read(&nfsi->rwsem);
01c3b861 4855 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4856 /* Yes: cache locks! */
01c3b861 4857 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4858 request->fl_flags = fl_flags & ~FL_SLEEP;
4859 status = do_vfs_lock(request->fl_file, request);
4860 goto out_unlock;
01c3b861 4861 }
afe6c27c 4862 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4863 if (status != 0)
01c3b861 4864 goto out_unlock;
6bfc93ef 4865 /* Note: we always want to sleep here! */
01c3b861 4866 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4867 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 4868 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4869 "manager!\n", __func__);
01c3b861 4870out_unlock:
19e03c57 4871 up_read(&nfsi->rwsem);
01c3b861
TM		 4872out:
4873 request->fl_flags = fl_flags;
1da177e4
LT		 4874 return status;
4875}
4876
4877static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4878{
a1d0b5ee
TM		 4879 struct nfs4_exception exception = {
4880 .state = state,
05ffe24f 4881 .inode = state->inode,
a1d0b5ee 4882 };
1da177e4
LT		 4883 int err;
4884
4885 do {
965b5d67
TM		 4886 err = _nfs4_proc_setlk(state, cmd, request);
4887 if (err == -NFS4ERR_DENIED)
4888 err = -EAGAIN;
1da177e4 4889 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4890 err, &exception);
1da177e4
LT		 4891 } while (exception.retry);
4892 return err;
4893}
4894
4895static int
4896nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4897{
4898 struct nfs_open_context *ctx;
4899 struct nfs4_state *state;
4900 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4901 int status;
4902
4903 /* verify open state */
cd3758e3 4904 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4905 state = ctx->state;
4906
4907 if (request->fl_start < 0 || request->fl_end < 0)
4908 return -EINVAL;
4909
d953126a
TM		 4910 if (IS_GETLK(cmd)) {
4911 if (state != NULL)
4912 return nfs4_proc_getlk(state, F_GETLK, request);
4913 return 0;
4914 }
1da177e4
LT		 4915
4916 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4917 return -EINVAL;
4918
d953126a
TM		 4919 if (request->fl_type == F_UNLCK) {
4920 if (state != NULL)
4921 return nfs4_proc_unlck(state, cmd, request);
4922 return 0;
4923 }
1da177e4 4924
d953126a
TM		 4925 if (state == NULL)
4926 return -ENOLCK;
55725513
TM		 4927 /*
4928 * Don't rely on the VFS having checked the file open mode,
4929 * since it won't do this for flock() locks.
4930 */
f44106e2 4931 switch (request->fl_type) {
55725513
TM		 4932 case F_RDLCK:
4933 if (!(filp->f_mode & FMODE_READ))
4934 return -EBADF;
4935 break;
4936 case F_WRLCK:
4937 if (!(filp->f_mode & FMODE_WRITE))
4938 return -EBADF;
4939 }
4940
1da177e4
LT		 4941 do {
4942 status = nfs4_proc_setlk(state, cmd, request);
4943 if ((status != -EAGAIN) || IS_SETLK(cmd))
4944 break;
4945 timeout = nfs4_set_lock_task_retry(timeout);
4946 status = -ERESTARTSYS;
4947 if (signalled())
4948 break;
4949 } while(status < 0);
1da177e4
LT		 4950 return status;
4951}
4952
888e694c
TM		 4953int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4954{
4955 struct nfs_server *server = NFS_SERVER(state->inode);
4956 struct nfs4_exception exception = { };
4957 int err;
4958
4959 err = nfs4_set_lock_state(state, fl);
4960 if (err != 0)
4961 goto out;
4962 do {
afe6c27c 4963 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4964 switch (err) {
4965 default:
a030889a
WAA		 4966 printk(KERN_ERR "NFS: %s: unhandled error "
4967 "%d.\n", __func__, err);
d5122201 4968 case 0:
965b5d67 4969 case -ESTALE:
d5122201
TM		 4970 goto out;
4971 case -NFS4ERR_EXPIRED:
0ced63d1 4972 nfs4_schedule_stateid_recovery(server, state);
d5122201 4973 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4974 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 4975 nfs4_schedule_lease_recovery(server->nfs_client);
4976 goto out;
74e7bb73
RL		 4977 case -NFS4ERR_BADSESSION:
4978 case -NFS4ERR_BADSLOT:
4979 case -NFS4ERR_BAD_HIGH_SLOT:
4980 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4981 case -NFS4ERR_DEADSESSION:
9f594791 4982 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
d5122201 4983 goto out;
965b5d67
TM		 4984 case -ERESTARTSYS:
4985 /*
4986 * The show must go on: exit, but mark the
4987 * stateid as needing recovery.
4988 */
a1d0b5ee 4989 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 4990 case -NFS4ERR_ADMIN_REVOKED:
4991 case -NFS4ERR_BAD_STATEID:
4992 case -NFS4ERR_OPENMODE:
0400a6b0 4993 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 4994 err = 0;
4995 goto out;
168667c4
TM		 4996 case -EKEYEXPIRED:
4997 /*
4998 * User RPCSEC_GSS context has expired.
4999 * We cannot recover this stateid now, so
5000 * skip it and allow recovery thread to
5001 * proceed.
5002 */
5003 err = 0;
5004 goto out;
965b5d67
TM		 5005 case -ENOMEM:
5006 case -NFS4ERR_DENIED:
5007 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
5008 err = 0;
5009 goto out;
d5122201
TM		 5010 case -NFS4ERR_DELAY:
5011 break;
5012 }
888e694c
TM		 5013 err = nfs4_handle_exception(server, err, &exception);
5014 } while (exception.retry);
5015out:
5016 return err;
5017}
6b3b5496 5018
cf470c3e
TM		 5019struct nfs_release_lockowner_data {
5020 struct nfs4_lock_state *lsp;
5ae67c4f 5021 struct nfs_server *server;
cf470c3e
TM		 5022 struct nfs_release_lockowner_args args;
5023};
5024
d3c7b7cc
TM		 5025static void nfs4_release_lockowner_release(void *calldata)
5026{
cf470c3e 5027 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5028 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5029 kfree(calldata);
5030}
5031
17280175 5032static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5033 .rpc_release = nfs4_release_lockowner_release,
5034};
5035
cf470c3e 5036int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 5037{
5038 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 5039 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5040 struct rpc_message msg = {
5041 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5042 };
5043
5044 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5045 return -EINVAL;
5046 data = kmalloc(sizeof(*data), GFP_NOFS);
5047 if (!data)
5048 return -ENOMEM;
5049 data->lsp = lsp;
5ae67c4f 5050 data->server = server;
cf470c3e
TM		 5051 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5052 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5053 data->args.lock_owner.s_dev = server->s_dev;
5054 msg.rpc_argp = &data->args;
5055 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5056 return 0;
d3c7b7cc
TM		 5057}
5058
aa1870af
BF		 5059#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5060
64c2ce8b
AK		 5061static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5062 const void *buf, size_t buflen,
5063 int flags, int type)
6b3b5496 5064{
64c2ce8b
AK		 5065 if (strcmp(key, "") != 0)
5066 return -EINVAL;
4b580ee3 5067
64c2ce8b 5068 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5069}
5070
64c2ce8b
AK		 5071static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5072 void *buf, size_t buflen, int type)
6b3b5496 5073{
64c2ce8b
AK		 5074 if (strcmp(key, "") != 0)
5075 return -EINVAL;
aa1870af 5076
64c2ce8b 5077 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5078}
5079
64c2ce8b
AK		 5080static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5081 size_t list_len, const char *name,
5082 size_t name_len, int type)
6b3b5496 5083{
64c2ce8b 5084 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5085
096455a2
BF		 5086 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5087 return 0;
64c2ce8b
AK		 5088
5089 if (list && len <= list_len)
5090 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5091 return len;
6b3b5496
BF		 5092}
5093
533eb461
AA		 5094/*
5095 * nfs_fhget will use either the mounted_on_fileid or the fileid
5096 */
69aaaae1
TM		 5097static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5098{
533eb461
AA		 5099 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5100 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5101 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5102 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5103 return;
5104
5105 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5106 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5107 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5108 fattr->nlink = 2;
5109}
5110
f05d147f
BS		 5111static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5112 const struct qstr *name,
5113 struct nfs4_fs_locations *fs_locations,
5114 struct page *page)
683b57b4
TM		 5115{
5116 struct nfs_server *server = NFS_SERVER(dir);
5117 u32 bitmask[2] = {
361e624f 5118 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5119 };
5120 struct nfs4_fs_locations_arg args = {
5121 .dir_fh = NFS_FH(dir),
c228fd3a 5122 .name = name,
683b57b4
TM		 5123 .page = page,
5124 .bitmask = bitmask,
5125 };
22958463
BH		 5126 struct nfs4_fs_locations_res res = {
5127 .fs_locations = fs_locations,
5128 };
683b57b4
TM		 5129 struct rpc_message msg = {
5130 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5131 .rpc_argp = &args,
22958463 5132 .rpc_resp = &res,
683b57b4
TM		 5133 };
5134 int status;
5135
3110ff80 5136 dprintk("%s: start\n", __func__);
533eb461
AA		 5137
5138 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5139 * is not supported */
5140 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5141 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5142 else
5143 bitmask[0] |= FATTR4_WORD0_FILEID;
5144
c228fd3a 5145 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5146 fs_locations->server = server;
830b8e33 5147 fs_locations->nlocations = 0;
f05d147f 5148 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5149 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5150 return status;
5151}
5152
f05d147f
BS		 5153int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5154 const struct qstr *name,
5155 struct nfs4_fs_locations *fs_locations,
5156 struct page *page)
db0a9593
BS		 5157{
5158 struct nfs4_exception exception = { };
5159 int err;
5160 do {
5161 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5162 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5163 &exception);
5164 } while (exception.retry);
5165 return err;
5166}
5167
5a5ea0d4
BS		 5168static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5169{
5170 int status;
5171 struct nfs4_secinfo_arg args = {
5172 .dir_fh = NFS_FH(dir),
5173 .name = name,
5174 };
5175 struct nfs4_secinfo_res res = {
5176 .flavors = flavors,
5177 };
5178 struct rpc_message msg = {
5179 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5180 .rpc_argp = &args,
5181 .rpc_resp = &res,
5182 };
5183
5184 dprintk("NFS call secinfo %s\n", name->name);
5185 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5186 dprintk("NFS reply secinfo: %d\n", status);
5187 return status;
5188}
5189
72de53ec
BS		 5190int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5191 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5192{
5193 struct nfs4_exception exception = { };
5194 int err;
5195 do {
5196 err = nfs4_handle_exception(NFS_SERVER(dir),
5197 _nfs4_proc_secinfo(dir, name, flavors),
5198 &exception);
5199 } while (exception.retry);
5200 return err;
5201}
5202
557134a3 5203#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5204/*
5205 * Check the exchange flags returned by the server for invalid flags, having
5206 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5207 * DS flags set.
5208 */
5209static int nfs4_check_cl_exchange_flags(u32 flags)
5210{
5211 if (flags & ~EXCHGID4_FLAG_MASK_R)
5212 goto out_inval;
5213 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5214 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5215 goto out_inval;
5216 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5217 goto out_inval;
5218 return NFS_OK;
5219out_inval:
5220 return -NFS4ERR_INVAL;
5221}
5222
78fe0f41 5223static bool
79d4e1f0
CL		 5224nfs41_same_server_scope(struct nfs41_server_scope *a,
5225 struct nfs41_server_scope *b)
78fe0f41
WAA		 5226{
5227 if (a->server_scope_sz == b->server_scope_sz &&
5228 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5229 return true;
5230
5231 return false;
5232}
5233
7c44f1ae
WAA		 5234/*
5235 * nfs4_proc_bind_conn_to_session()
5236 *
5237 * The 4.1 client currently uses the same TCP connection for the
5238 * fore and backchannel.
5239 */
2cf047c9 5240int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5241{
5242 int status;
5243 struct nfs41_bind_conn_to_session_res res;
5244 struct rpc_message msg = {
5245 .rpc_proc =
5246 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5247 .rpc_argp = clp,
5248 .rpc_resp = &res,
2cf047c9 5249 .rpc_cred = cred,
7c44f1ae
WAA		 5250 };
5251
5252 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5253
5254 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5255 if (unlikely(res.session == NULL)) {
5256 status = -ENOMEM;
5257 goto out;
5258 }
5259
5260 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5261 if (status == 0) {
5262 if (memcmp(res.session->sess_id.data,
5263 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5264 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5265 status = -EIO;
5266 goto out_session;
5267 }
5268 if (res.dir != NFS4_CDFS4_BOTH) {
5269 dprintk("NFS: %s: Unexpected direction from server\n",
5270 __func__);
5271 status = -EIO;
5272 goto out_session;
5273 }
5274 if (res.use_conn_in_rdma_mode) {
5275 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5276 __func__);
5277 status = -EIO;
5278 goto out_session;
5279 }
5280 }
5281out_session:
5282 kfree(res.session);
5283out:
5284 dprintk("<-- %s status= %d\n", __func__, status);
5285 return status;
5286}
5287
99fe60d0
BH		 5288/*
5289 * nfs4_proc_exchange_id()
5290 *
6bbb4ae8
CL		 5291 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5292 *
99fe60d0
BH		 5293 * Since the clientid has expired, all compounds using sessions
5294 * associated with the stale clientid will be returning
5295 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5296 * be in some phase of session reset.
5297 */
4d643d1d 5298int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5299{
5300 nfs4_verifier verifier;
5301 struct nfs41_exchange_id_args args = {
cd93710e 5302 .verifier = &verifier,
99fe60d0 5303 .client = clp,
357f54d6 5304 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5305 };
5306 struct nfs41_exchange_id_res res = {
32b01310 5307 0
99fe60d0
BH		 5308 };
5309 int status;
5310 struct rpc_message msg = {
5311 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5312 .rpc_argp = &args,
5313 .rpc_resp = &res,
5314 .rpc_cred = cred,
5315 };
99fe60d0 5316
f092075d 5317 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5318 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5319 sizeof(args.id));
6bbb4ae8
CL		 5320 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5321 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5322 args.id_len, args.id);
99fe60d0 5323
acdeb69d 5324 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5325 GFP_NOFS);
acdeb69d 5326 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5327 status = -ENOMEM;
5328 goto out;
5329 }
78fe0f41 5330
79d4e1f0 5331 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5332 GFP_NOFS);
177313f1 5333 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5334 status = -ENOMEM;
acdeb69d 5335 goto out_server_owner;
abe9a6d5 5336 }
78fe0f41 5337
bbafffd2 5338 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5339 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5340 status = -ENOMEM;
5341 goto out_server_scope;
5342 }
5343
1bd714f2 5344 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5345 if (status == 0)
32b01310 5346 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5347
acdeb69d 5348 if (status == 0) {
32b01310
TM		 5349 clp->cl_clientid = res.clientid;
5350 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5351 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5352 clp->cl_seqid = res.seqid;
5353
acdeb69d
CL		 5354 kfree(clp->cl_serverowner);
5355 clp->cl_serverowner = res.server_owner;
5356 res.server_owner = NULL;
78fe0f41 5357
7d2ed9ac 5358 /* use the most recent implementation id */
59155546
CL		 5359 kfree(clp->cl_implid);
5360 clp->cl_implid = res.impl_id;
7d2ed9ac 5361
177313f1 5362 if (clp->cl_serverscope != NULL &&
79d4e1f0 5363 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5364 res.server_scope)) {
5365 dprintk("%s: server_scope mismatch detected\n",
5366 __func__);
5367 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5368 kfree(clp->cl_serverscope);
5369 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5370 }
5371
177313f1 5372 if (clp->cl_serverscope == NULL) {
79d4e1f0 5373 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5374 goto out;
5375 }
32b01310
TM		 5376 } else
5377 kfree(res.impl_id);
7d2ed9ac 5378
acdeb69d
CL		 5379out_server_owner:
5380 kfree(res.server_owner);
7d2ed9ac 5381out_server_scope:
abe9a6d5
WAA		 5382 kfree(res.server_scope);
5383out:
177313f1 5384 if (clp->cl_implid != NULL)
6bbb4ae8 5385 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5386 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5387 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5388 clp->cl_implid->date.seconds,
5389 clp->cl_implid->date.nseconds);
6bbb4ae8 5390 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5391 return status;
5392}
5393
66245539
TM		 5394static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5395 struct rpc_cred *cred)
5396{
5397 struct rpc_message msg = {
5398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5399 .rpc_argp = clp,
5400 .rpc_cred = cred,
5401 };
5402 int status;
5403
5404 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5405 if (status)
02c67525 5406 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5407 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5408 return status;
5409}
5410
5411static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5412 struct rpc_cred *cred)
5413{
5414 unsigned int loop;
5415 int ret;
5416
5417 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5418 ret = _nfs4_proc_destroy_clientid(clp, cred);
5419 switch (ret) {
5420 case -NFS4ERR_DELAY:
5421 case -NFS4ERR_CLIENTID_BUSY:
5422 ssleep(1);
5423 break;
5424 default:
5425 return ret;
5426 }
5427 }
5428 return 0;
5429}
5430
5431int nfs4_destroy_clientid(struct nfs_client *clp)
5432{
5433 struct rpc_cred *cred;
5434 int ret = 0;
5435
5436 if (clp->cl_mvops->minor_version < 1)
5437 goto out;
5438 if (clp->cl_exchange_flags == 0)
5439 goto out;
05f4c350
CL		 5440 if (clp->cl_preserve_clid)
5441 goto out;
66245539
TM		 5442 cred = nfs4_get_exchange_id_cred(clp);
5443 ret = nfs4_proc_destroy_clientid(clp, cred);
5444 if (cred)
5445 put_rpccred(cred);
5446 switch (ret) {
5447 case 0:
5448 case -NFS4ERR_STALE_CLIENTID:
5449 clp->cl_exchange_flags = 0;
5450 }
5451out:
5452 return ret;
5453}
5454
2050f0cc
AA		 5455struct nfs4_get_lease_time_data {
5456 struct nfs4_get_lease_time_args *args;
5457 struct nfs4_get_lease_time_res *res;
5458 struct nfs_client *clp;
5459};
5460
5461static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5462 void *calldata)
5463{
5464 int ret;
5465 struct nfs4_get_lease_time_data *data =
5466 (struct nfs4_get_lease_time_data *)calldata;
5467
5468 dprintk("--> %s\n", __func__);
689cf5c1 5469 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
2050f0cc
AA		 5470 /* just setup sequence, do not trigger session recovery
5471 since we're invoked within one */
5472 ret = nfs41_setup_sequence(data->clp->cl_session,
689cf5c1 5473 &data->args->la_seq_args,
9d12b216 5474 &data->res->lr_seq_res, task);
2050f0cc 5475
d3edcf96
TM		 5476 if (ret != -EAGAIN)
5477 rpc_call_start(task);
2050f0cc
AA		 5478 dprintk("<-- %s\n", __func__);
5479}
5480
5481/*
5482 * Called from nfs4_state_manager thread for session setup, so don't recover
5483 * from sequence operation or clientid errors.
5484 */
5485static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5486{
5487 struct nfs4_get_lease_time_data *data =
5488 (struct nfs4_get_lease_time_data *)calldata;
5489
5490 dprintk("--> %s\n", __func__);
14516c3a
TM		 5491 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5492 return;
2050f0cc
AA		 5493 switch (task->tk_status) {
5494 case -NFS4ERR_DELAY:
5495 case -NFS4ERR_GRACE:
5496 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5497 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5498 task->tk_status = 0;
a8a4ae3a
AA		 5499 /* fall through */
5500 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5501 rpc_restart_call_prepare(task);
2050f0cc
AA		 5502 return;
5503 }
2050f0cc
AA		 5504 dprintk("<-- %s\n", __func__);
5505}
5506
17280175 5507static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5508 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5509 .rpc_call_done = nfs4_get_lease_time_done,
5510};
5511
5512int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5513{
5514 struct rpc_task *task;
5515 struct nfs4_get_lease_time_args args;
5516 struct nfs4_get_lease_time_res res = {
5517 .lr_fsinfo = fsinfo,
5518 };
5519 struct nfs4_get_lease_time_data data = {
5520 .args = &args,
5521 .res = &res,
5522 .clp = clp,
5523 };
5524 struct rpc_message msg = {
5525 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5526 .rpc_argp = &args,
5527 .rpc_resp = &res,
5528 };
5529 struct rpc_task_setup task_setup = {
5530 .rpc_client = clp->cl_rpcclient,
5531 .rpc_message = &msg,
5532 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5533 .callback_data = &data,
5534 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5535 };
5536 int status;
5537
9d12b216 5538 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
2050f0cc
AA		 5539 dprintk("--> %s\n", __func__);
5540 task = rpc_run_task(&task_setup);
5541
5542 if (IS_ERR(task))
5543 status = PTR_ERR(task);
5544 else {
5545 status = task->tk_status;
5546 rpc_put_task(task);
5547 }
5548 dprintk("<-- %s return %d\n", __func__, status);
5549
5550 return status;
5551}
5552
fc931582
AA		 5553/*
5554 * Initialize the values to be used by the client in CREATE_SESSION
5555 * If nfs4_init_session set the fore channel request and response sizes,
5556 * use them.
5557 *
5558 * Set the back channel max_resp_sz_cached to zero to force the client to
5559 * always set csa_cachethis to FALSE because the current implementation
5560 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5561 */
5562static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5563{
5564 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5565 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5566 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5567
5568 if (mxrqst_sz == 0)
5569 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5570 if (mxresp_sz == 0)
5571 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5572 /* Fore channel attributes */
fc931582
AA		 5573 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5574 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5575 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5576 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5577
5578 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5579 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5580 __func__,
5581 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5582 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5583
5584 /* Back channel attributes */
fc931582
AA		 5585 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5586 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5587 args->bc_attrs.max_resp_sz_cached = 0;
5588 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5589 args->bc_attrs.max_reqs = 1;
5590
5591 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5592 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5593 __func__,
5594 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5595 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5596 args->bc_attrs.max_reqs);
5597}
5598
43c2e885 5599static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5600{
43c2e885
BF		 5601 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5602 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5603
43c2e885
BF		 5604 if (rcvd->max_resp_sz > sent->max_resp_sz)
5605 return -EINVAL;
5606 /*
5607 * Our requested max_ops is the minimum we need; we're not
5608 * prepared to break up compounds into smaller pieces than that.
5609 * So, no point even trying to continue if the server won't
5610 * cooperate:
5611 */
5612 if (rcvd->max_ops < sent->max_ops)
5613 return -EINVAL;
5614 if (rcvd->max_reqs == 0)
5615 return -EINVAL;
b4b9a0c1
VG		 5616 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5617 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5618 return 0;
8d35301d
AA		 5619}
5620
43c2e885
BF		 5621static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5622{
5623 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5624 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5625
43c2e885
BF		 5626 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5627 return -EINVAL;
5628 if (rcvd->max_resp_sz < sent->max_resp_sz)
5629 return -EINVAL;
5630 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5631 return -EINVAL;
5632 /* These would render the backchannel useless: */
b4b9a0c1 5633 if (rcvd->max_ops != sent->max_ops)
43c2e885 5634 return -EINVAL;
b4b9a0c1 5635 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5636 return -EINVAL;
5637 return 0;
5638}
8d35301d 5639
8d35301d
AA		 5640static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5641 struct nfs4_session *session)
5642{
43c2e885 5643 int ret;
8d35301d 5644
43c2e885
BF		 5645 ret = nfs4_verify_fore_channel_attrs(args, session);
5646 if (ret)
5647 return ret;
5648 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5649}
5650
848f5bda
TM		 5651static int _nfs4_proc_create_session(struct nfs_client *clp,
5652 struct rpc_cred *cred)
fc931582
AA		 5653{
5654 struct nfs4_session *session = clp->cl_session;
5655 struct nfs41_create_session_args args = {
5656 .client = clp,
5657 .cb_program = NFS4_CALLBACK,
5658 };
5659 struct nfs41_create_session_res res = {
5660 .client = clp,
5661 };
5662 struct rpc_message msg = {
5663 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5664 .rpc_argp = &args,
5665 .rpc_resp = &res,
848f5bda 5666 .rpc_cred = cred,
fc931582
AA		 5667 };
5668 int status;
5669
5670 nfs4_init_channel_attrs(&args);
0f91421e 5671 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5672
1bd714f2 5673 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5674
43095d39 5675 if (!status) {
8d35301d
AA		 5676 /* Verify the session's negotiated channel_attrs values */
5677 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5678 /* Increment the clientid slot sequence id */
5679 clp->cl_seqid++;
5680 }
5681
5682 return status;
5683}
5684
5685/*
5686 * Issues a CREATE_SESSION operation to the server.
5687 * It is the responsibility of the caller to verify the session is
5688 * expired before calling this routine.
5689 */
848f5bda 5690int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5691{
5692 int status;
5693 unsigned *ptr;
fc931582
AA		 5694 struct nfs4_session *session = clp->cl_session;
5695
5696 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5697
848f5bda 5698 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5699 if (status)
5700 goto out;
5701
aacd5537
AA		 5702 /* Init or reset the session slot tables */
5703 status = nfs4_setup_session_slot_tables(session);
5704 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5705 if (status)
5706 goto out;
5707
5708 ptr = (unsigned *)&session->sess_id.data[0];
5709 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5710 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5711out:
5712 dprintk("<-- %s\n", __func__);
5713 return status;
5714}
5715
0f3e66c6
AA		 5716/*
5717 * Issue the over-the-wire RPC DESTROY_SESSION.
5718 * The caller must serialize access to this routine.
5719 */
848f5bda
TM		 5720int nfs4_proc_destroy_session(struct nfs4_session *session,
5721 struct rpc_cred *cred)
0f3e66c6 5722{
848f5bda
TM		 5723 struct rpc_message msg = {
5724 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5725 .rpc_argp = session,
5726 .rpc_cred = cred,
5727 };
0f3e66c6 5728 int status = 0;
0f3e66c6
AA		 5729
5730 dprintk("--> nfs4_proc_destroy_session\n");
5731
5732 /* session is still being setup */
5733 if (session->clp->cl_cons_state != NFS_CS_READY)
5734 return status;
5735
1bd714f2 5736 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5737
5738 if (status)
08106ac7 5739 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5740 "Session has been destroyed regardless...\n", status);
5741
5742 dprintk("<-- nfs4_proc_destroy_session\n");
5743 return status;
5744}
5745
fc01cea9
AA		 5746/*
5747 * Renew the cl_session lease.
5748 */
d5f8d3fe
TM		 5749struct nfs4_sequence_data {
5750 struct nfs_client *clp;
5751 struct nfs4_sequence_args args;
5752 struct nfs4_sequence_res res;
5753};
5754
dc96aef9
AB		 5755static void nfs41_sequence_release(void *data)
5756{
d5f8d3fe
TM		 5757 struct nfs4_sequence_data *calldata = data;
5758 struct nfs_client *clp = calldata->clp;
dc96aef9 5759
7135840f
AB		 5760 if (atomic_read(&clp->cl_count) > 1)
5761 nfs4_schedule_state_renewal(clp);
5762 nfs_put_client(clp);
d5f8d3fe 5763 kfree(calldata);
dc96aef9
AB		 5764}
5765
aa5190d0
TM		 5766static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5767{
5768 switch(task->tk_status) {
5769 case -NFS4ERR_DELAY:
aa5190d0
TM		 5770 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5771 return -EAGAIN;
5772 default:
0400a6b0 5773 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5774 }
5775 return 0;
5776}
5777
dc96aef9 5778static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5779{
d5f8d3fe
TM		 5780 struct nfs4_sequence_data *calldata = data;
5781 struct nfs_client *clp = calldata->clp;
fc01cea9 5782
14516c3a
TM		 5783 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5784 return;
fc01cea9
AA		 5785
5786 if (task->tk_status < 0) {
5787 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5788 if (atomic_read(&clp->cl_count) == 1)
5789 goto out;
fc01cea9 5790
aa5190d0
TM		 5791 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5792 rpc_restart_call_prepare(task);
fc01cea9
AA		 5793 return;
5794 }
5795 }
fc01cea9 5796 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5797out:
fc01cea9
AA		 5798 dprintk("<-- %s\n", __func__);
5799}
5800
5801static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5802{
d5f8d3fe
TM		 5803 struct nfs4_sequence_data *calldata = data;
5804 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5805 struct nfs4_sequence_args *args;
5806 struct nfs4_sequence_res *res;
5807
fc01cea9
AA		 5808 args = task->tk_msg.rpc_argp;
5809 res = task->tk_msg.rpc_resp;
5810
9d12b216 5811 if (nfs41_setup_sequence(clp->cl_session, args, res, task))
fc01cea9
AA		 5812 return;
5813 rpc_call_start(task);
5814}
5815
6bdb5f21
BS		 5816static void nfs41_sequence_prepare_privileged(struct rpc_task *task, void *data)
5817{
5818 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
5819 nfs41_sequence_prepare(task, data);
5820}
5821
fc01cea9
AA		 5822static const struct rpc_call_ops nfs41_sequence_ops = {
5823 .rpc_call_done = nfs41_sequence_call_done,
5824 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5825 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5826};
5827
6bdb5f21
BS		 5828static const struct rpc_call_ops nfs41_sequence_privileged_ops = {
5829 .rpc_call_done = nfs41_sequence_call_done,
5830 .rpc_call_prepare = nfs41_sequence_prepare_privileged,
5831 .rpc_release = nfs41_sequence_release,
5832};
5833
5834static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred,
5835 const struct rpc_call_ops *seq_ops)
fc01cea9 5836{
d5f8d3fe 5837 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5838 struct rpc_message msg = {
5839 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5840 .rpc_cred = cred,
5841 };
71ac6da9
TM		 5842 struct rpc_task_setup task_setup_data = {
5843 .rpc_client = clp->cl_rpcclient,
5844 .rpc_message = &msg,
6bdb5f21 5845 .callback_ops = seq_ops,
71ac6da9
TM		 5846 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5847 };
fc01cea9 5848
7135840f 5849 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5850 return ERR_PTR(-EIO);
dfb4f309 5851 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5852 if (calldata == NULL) {
7135840f 5853 nfs_put_client(clp);
71ac6da9 5854 return ERR_PTR(-ENOMEM);
fc01cea9 5855 }
9d12b216 5856 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
d5f8d3fe
TM		 5857 msg.rpc_argp = &calldata->args;
5858 msg.rpc_resp = &calldata->res;
5859 calldata->clp = clp;
71ac6da9 5860 task_setup_data.callback_data = calldata;
fc01cea9 5861
71ac6da9
TM		 5862 return rpc_run_task(&task_setup_data);
5863}
5864
2f60ea6b 5865static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 5866{
5867 struct rpc_task *task;
5868 int ret = 0;
5869
2f60ea6b
TM		 5870 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5871 return 0;
6bdb5f21 5872 task = _nfs41_proc_sequence(clp, cred, &nfs41_sequence_ops);
71ac6da9
TM		 5873 if (IS_ERR(task))
5874 ret = PTR_ERR(task);
5875 else
bf294b41 5876 rpc_put_task_async(task);
71ac6da9
TM		 5877 dprintk("<-- %s status=%d\n", __func__, ret);
5878 return ret;
5879}
5880
5881static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5882{
5883 struct rpc_task *task;
5884 int ret;
5885
6bdb5f21 5886 task = _nfs41_proc_sequence(clp, cred, &nfs41_sequence_privileged_ops);
71ac6da9
TM		 5887 if (IS_ERR(task)) {
5888 ret = PTR_ERR(task);
5889 goto out;
5890 }
5891 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5892 if (!ret) {
5893 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5894
5895 if (task->tk_status == 0)
5896 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 5897 ret = task->tk_status;
b4410c2f 5898 }
71ac6da9
TM		 5899 rpc_put_task(task);
5900out:
5901 dprintk("<-- %s status=%d\n", __func__, ret);
5902 return ret;
fc01cea9
AA		 5903}
5904
fce5c838
RL		 5905struct nfs4_reclaim_complete_data {
5906 struct nfs_client *clp;
5907 struct nfs41_reclaim_complete_args arg;
5908 struct nfs41_reclaim_complete_res res;
5909};
5910
5911static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5912{
5913 struct nfs4_reclaim_complete_data *calldata = data;
5914
b257957e 5915 rpc_task_set_priority(task, RPC_PRIORITY_PRIVILEGED);
035168ab
TM		 5916 if (nfs41_setup_sequence(calldata->clp->cl_session,
5917 &calldata->arg.seq_args,
9d12b216 5918 &calldata->res.seq_res, task))
fce5c838
RL		 5919 return;
5920
5921 rpc_call_start(task);
5922}
5923
aa5190d0
TM		 5924static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5925{
5926 switch(task->tk_status) {
5927 case 0:
5928 case -NFS4ERR_COMPLETE_ALREADY:
5929 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5930 break;
5931 case -NFS4ERR_DELAY:
aa5190d0 5932 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 5933 /* fall through */
5934 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 5935 return -EAGAIN;
5936 default:
0400a6b0 5937 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5938 }
5939 return 0;
5940}
5941
fce5c838
RL		 5942static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5943{
5944 struct nfs4_reclaim_complete_data *calldata = data;
5945 struct nfs_client *clp = calldata->clp;
5946 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5947
5948 dprintk("--> %s\n", __func__);
14516c3a
TM		 5949 if (!nfs41_sequence_done(task, res))
5950 return;
fce5c838 5951
aa5190d0
TM		 5952 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5953 rpc_restart_call_prepare(task);
5954 return;
5955 }
fce5c838
RL		 5956 dprintk("<-- %s\n", __func__);
5957}
5958
5959static void nfs4_free_reclaim_complete_data(void *data)
5960{
5961 struct nfs4_reclaim_complete_data *calldata = data;
5962
5963 kfree(calldata);
5964}
5965
5966static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5967 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5968 .rpc_call_done = nfs4_reclaim_complete_done,
5969 .rpc_release = nfs4_free_reclaim_complete_data,
5970};
5971
5972/*
5973 * Issue a global reclaim complete.
5974 */
5975static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5976{
5977 struct nfs4_reclaim_complete_data *calldata;
5978 struct rpc_task *task;
5979 struct rpc_message msg = {
5980 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5981 };
5982 struct rpc_task_setup task_setup_data = {
5983 .rpc_client = clp->cl_rpcclient,
5984 .rpc_message = &msg,
5985 .callback_ops = &nfs4_reclaim_complete_call_ops,
5986 .flags = RPC_TASK_ASYNC,
5987 };
5988 int status = -ENOMEM;
5989
5990 dprintk("--> %s\n", __func__);
8535b2be 5991 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5992 if (calldata == NULL)
5993 goto out;
5994 calldata->clp = clp;
5995 calldata->arg.one_fs = 0;
fce5c838 5996
9d12b216 5997 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
fce5c838
RL		 5998 msg.rpc_argp = &calldata->arg;
5999 msg.rpc_resp = &calldata->res;
6000 task_setup_data.callback_data = calldata;
6001 task = rpc_run_task(&task_setup_data);
acf82b85 6002 if (IS_ERR(task)) {
fce5c838 6003 status = PTR_ERR(task);
acf82b85
DC		 6004 goto out;
6005 }
c34c32ea
AA		 6006 status = nfs4_wait_for_completion_rpc_task(task);
6007 if (status == 0)
6008 status = task->tk_status;
fce5c838 6009 rpc_put_task(task);
acf82b85 6010 return 0;
fce5c838
RL		 6011out:
6012 dprintk("<-- %s status=%d\n", __func__, status);
6013 return status;
6014}
b1f69b75
AA		 6015
6016static void
6017nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6018{
6019 struct nfs4_layoutget *lgp = calldata;
c31663d4 6020 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 6021
6022 dprintk("--> %s\n", __func__);
c31663d4
FI		 6023 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6024 * right now covering the LAYOUTGET we are about to send.
6025 * However, that is not so catastrophic, and there seems
6026 * to be no way to prevent it completely.
6027 */
b1f69b75 6028 if (nfs4_setup_sequence(server, &lgp->args.seq_args,
9d12b216 6029 &lgp->res.seq_res, task))
b1f69b75 6030 return;
cf7d63f1
FI		 6031 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6032 NFS_I(lgp->args.inode)->layout,
6033 lgp->args.ctx->state)) {
6034 rpc_exit(task, NFS4_OK);
6035 return;
6036 }
b1f69b75
AA		 6037 rpc_call_start(task);
6038}
6039
6040static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6041{
6042 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6043 struct inode *inode = lgp->args.inode;
6044 struct nfs_server *server = NFS_SERVER(inode);
6045 struct pnfs_layout_hdr *lo;
6046 struct nfs4_state *state = NULL;
b1f69b75
AA		 6047
6048 dprintk("--> %s\n", __func__);
6049
6050 if (!nfs4_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6051 goto out;
b1f69b75
AA		 6052
6053 switch (task->tk_status) {
6054 case 0:
ee314c2a 6055 goto out;
b1f69b75
AA		 6056 case -NFS4ERR_LAYOUTTRYLATER:
6057 case -NFS4ERR_RECALLCONFLICT:
6058 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6059 break;
6060 case -NFS4ERR_EXPIRED:
6061 case -NFS4ERR_BAD_STATEID:
6062 spin_lock(&inode->i_lock);
6063 lo = NFS_I(inode)->layout;
6064 if (!lo || list_empty(&lo->plh_segs)) {
6065 spin_unlock(&inode->i_lock);
6066 /* If the open stateid was bad, then recover it. */
6067 state = lgp->args.ctx->state;
6068 } else {
6069 LIST_HEAD(head);
6070
6071 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6072 spin_unlock(&inode->i_lock);
6073 /* Mark the bad layout state as invalid, then
6074 * retry using the open stateid. */
6075 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6076 }
6077 }
ee314c2a
TM		 6078 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6079 rpc_restart_call_prepare(task);
6080out:
b1f69b75
AA		 6081 dprintk("<-- %s\n", __func__);
6082}
6083
8554116e
IK		 6084static size_t max_response_pages(struct nfs_server *server)
6085{
6086 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6087 return nfs_page_array_len(0, max_resp_sz);
6088}
6089
6090static void nfs4_free_pages(struct page **pages, size_t size)
6091{
6092 int i;
6093
6094 if (!pages)
6095 return;
6096
6097 for (i = 0; i < size; i++) {
6098 if (!pages[i])
6099 break;
6100 __free_page(pages[i]);
6101 }
6102 kfree(pages);
6103}
6104
6105static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6106{
6107 struct page **pages;
6108 int i;
6109
6110 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6111 if (!pages) {
6112 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6113 return NULL;
6114 }
6115
6116 for (i = 0; i < size; i++) {
6117 pages[i] = alloc_page(gfp_flags);
6118 if (!pages[i]) {
6119 dprintk("%s: failed to allocate page\n", __func__);
6120 nfs4_free_pages(pages, size);
6121 return NULL;
6122 }
6123 }
6124
6125 return pages;
6126}
6127
b1f69b75
AA		 6128static void nfs4_layoutget_release(void *calldata)
6129{
6130 struct nfs4_layoutget *lgp = calldata;
8554116e
IK		 6131 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6132 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6133
6134 dprintk("--> %s\n", __func__);
8554116e 6135 nfs4_free_pages(lgp->args.layout.pages, max_pages);
b1f69b75
AA		 6136 put_nfs_open_context(lgp->args.ctx);
6137 kfree(calldata);
6138 dprintk("<-- %s\n", __func__);
6139}
6140
6141static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6142 .rpc_call_prepare = nfs4_layoutget_prepare,
6143 .rpc_call_done = nfs4_layoutget_done,
6144 .rpc_release = nfs4_layoutget_release,
6145};
6146
a0b0a6e3
TM		 6147struct pnfs_layout_segment *
6148nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75
AA		 6149{
6150 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
8554116e 6151 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6152 struct rpc_task *task;
6153 struct rpc_message msg = {
6154 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6155 .rpc_argp = &lgp->args,
6156 .rpc_resp = &lgp->res,
6157 };
6158 struct rpc_task_setup task_setup_data = {
6159 .rpc_client = server->client,
6160 .rpc_message = &msg,
6161 .callback_ops = &nfs4_layoutget_call_ops,
6162 .callback_data = lgp,
6163 .flags = RPC_TASK_ASYNC,
6164 };
a0b0a6e3 6165 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6166 int status = 0;
6167
6168 dprintk("--> %s\n", __func__);
6169
8554116e
IK		 6170 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6171 if (!lgp->args.layout.pages) {
6172 nfs4_layoutget_release(lgp);
a0b0a6e3 6173 return ERR_PTR(-ENOMEM);
8554116e
IK		 6174 }
6175 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6176
35124a09 6177 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6178 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6179 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
b1f69b75
AA		 6180 task = rpc_run_task(&task_setup_data);
6181 if (IS_ERR(task))
a0b0a6e3 6182 return ERR_CAST(task);
b1f69b75 6183 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6184 if (status == 0)
6185 status = task->tk_status;
6186 if (status == 0)
a0b0a6e3 6187 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6188 rpc_put_task(task);
6189 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6190 if (status)
6191 return ERR_PTR(status);
6192 return lseg;
b1f69b75
AA		 6193}
6194
cbe82603
BH		 6195static void
6196nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6197{
6198 struct nfs4_layoutreturn *lrp = calldata;
6199
6200 dprintk("--> %s\n", __func__);
6201 if (nfs41_setup_sequence(lrp->clp->cl_session, &lrp->args.seq_args,
9d12b216 6202 &lrp->res.seq_res, task))
cbe82603
BH		 6203 return;
6204 rpc_call_start(task);
6205}
6206
6207static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6208{
6209 struct nfs4_layoutreturn *lrp = calldata;
6210 struct nfs_server *server;
6211
6212 dprintk("--> %s\n", __func__);
6213
6214 if (!nfs4_sequence_done(task, &lrp->res.seq_res))
6215 return;
6216
6217 server = NFS_SERVER(lrp->args.inode);
6218 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6219 rpc_restart_call_prepare(task);
cbe82603
BH		 6220 return;
6221 }
cbe82603
BH		 6222 dprintk("<-- %s\n", __func__);
6223}
6224
6225static void nfs4_layoutreturn_release(void *calldata)
6226{
6227 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6228 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6229
6230 dprintk("--> %s\n", __func__);
849b286f
TM		 6231 spin_lock(&lo->plh_inode->i_lock);
6232 if (lrp->res.lrs_present)
6233 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6234 lo->plh_block_lgets--;
6235 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6236 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6237 kfree(calldata);
6238 dprintk("<-- %s\n", __func__);
6239}
6240
6241static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6242 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6243 .rpc_call_done = nfs4_layoutreturn_done,
6244 .rpc_release = nfs4_layoutreturn_release,
6245};
6246
6247int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6248{
6249 struct rpc_task *task;
6250 struct rpc_message msg = {
6251 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6252 .rpc_argp = &lrp->args,
6253 .rpc_resp = &lrp->res,
6254 };
6255 struct rpc_task_setup task_setup_data = {
6256 .rpc_client = lrp->clp->cl_rpcclient,
6257 .rpc_message = &msg,
6258 .callback_ops = &nfs4_layoutreturn_call_ops,
6259 .callback_data = lrp,
6260 };
6261 int status;
6262
6263 dprintk("--> %s\n", __func__);
9d12b216 6264 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6265 task = rpc_run_task(&task_setup_data);
6266 if (IS_ERR(task))
6267 return PTR_ERR(task);
6268 status = task->tk_status;
6269 dprintk("<-- %s status=%d\n", __func__, status);
6270 rpc_put_task(task);
6271 return status;
6272}
6273
7f11d8d3
AA		 6274/*
6275 * Retrieve the list of Data Server devices from the MDS.
6276 */
6277static int _nfs4_getdevicelist(struct nfs_server *server,
6278 const struct nfs_fh *fh,
6279 struct pnfs_devicelist *devlist)
6280{
6281 struct nfs4_getdevicelist_args args = {
6282 .fh = fh,
6283 .layoutclass = server->pnfs_curr_ld->id,
6284 };
6285 struct nfs4_getdevicelist_res res = {
6286 .devlist = devlist,
6287 };
6288 struct rpc_message msg = {
6289 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6290 .rpc_argp = &args,
6291 .rpc_resp = &res,
6292 };
6293 int status;
6294
6295 dprintk("--> %s\n", __func__);
6296 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6297 &res.seq_res, 0);
6298 dprintk("<-- %s status=%d\n", __func__, status);
6299 return status;
6300}
6301
6302int nfs4_proc_getdevicelist(struct nfs_server *server,
6303 const struct nfs_fh *fh,
6304 struct pnfs_devicelist *devlist)
6305{
6306 struct nfs4_exception exception = { };
6307 int err;
6308
6309 do {
6310 err = nfs4_handle_exception(server,
6311 _nfs4_getdevicelist(server, fh, devlist),
6312 &exception);
6313 } while (exception.retry);
6314
6315 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6316 err, devlist->num_devs);
6317
6318 return err;
6319}
6320EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6321
b1f69b75
AA		 6322static int
6323_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6324{
6325 struct nfs4_getdeviceinfo_args args = {
6326 .pdev = pdev,
6327 };
6328 struct nfs4_getdeviceinfo_res res = {
6329 .pdev = pdev,
6330 };
6331 struct rpc_message msg = {
6332 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6333 .rpc_argp = &args,
6334 .rpc_resp = &res,
6335 };
6336 int status;
6337
6338 dprintk("--> %s\n", __func__);
7c513058 6339 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6340 dprintk("<-- %s status=%d\n", __func__, status);
6341
6342 return status;
6343}
6344
6345int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6346{
6347 struct nfs4_exception exception = { };
6348 int err;
6349
6350 do {
6351 err = nfs4_handle_exception(server,
6352 _nfs4_proc_getdeviceinfo(server, pdev),
6353 &exception);
6354 } while (exception.retry);
6355 return err;
6356}
6357EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6358
863a3c6c
AA		 6359static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6360{
6361 struct nfs4_layoutcommit_data *data = calldata;
6362 struct nfs_server *server = NFS_SERVER(data->args.inode);
6363
6364 if (nfs4_setup_sequence(server, &data->args.seq_args,
9d12b216 6365 &data->res.seq_res, task))
863a3c6c
AA		 6366 return;
6367 rpc_call_start(task);
6368}
6369
6370static void
6371nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6372{
6373 struct nfs4_layoutcommit_data *data = calldata;
6374 struct nfs_server *server = NFS_SERVER(data->args.inode);
6375
6376 if (!nfs4_sequence_done(task, &data->res.seq_res))
6377 return;
6378
6379 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6380 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6381 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6382 case -NFS4ERR_BADLAYOUT: /* no layout */
6383 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6384 task->tk_status = 0;
e59d27e0
TM		 6385 break;
6386 case 0:
863a3c6c
AA		 6387 nfs_post_op_update_inode_force_wcc(data->args.inode,
6388 data->res.fattr);
e59d27e0
TM		 6389 break;
6390 default:
6391 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6392 rpc_restart_call_prepare(task);
6393 return;
6394 }
6395 }
863a3c6c
AA		 6396}
6397
6398static void nfs4_layoutcommit_release(void *calldata)
6399{
6400 struct nfs4_layoutcommit_data *data = calldata;
a9bae566 6401 struct pnfs_layout_segment *lseg, *tmp;
92407e75 6402 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
863a3c6c 6403
db29c089 6404 pnfs_cleanup_layoutcommit(data);
863a3c6c 6405 /* Matched by references in pnfs_set_layoutcommit */
a9bae566
PT		 6406 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6407 list_del_init(&lseg->pls_lc_list);
6408 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6409 &lseg->pls_flags))
9369a431 6410 pnfs_put_lseg(lseg);
a9bae566 6411 }
92407e75
PT		 6412
6413 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6414 smp_mb__after_clear_bit();
6415 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6416
863a3c6c
AA		 6417 put_rpccred(data->cred);
6418 kfree(data);
6419}
6420
6421static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6422 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6423 .rpc_call_done = nfs4_layoutcommit_done,
6424 .rpc_release = nfs4_layoutcommit_release,
6425};
6426
6427int
ef311537 6428nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6429{
6430 struct rpc_message msg = {
6431 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6432 .rpc_argp = &data->args,
6433 .rpc_resp = &data->res,
6434 .rpc_cred = data->cred,
6435 };
6436 struct rpc_task_setup task_setup_data = {
6437 .task = &data->task,
6438 .rpc_client = NFS_CLIENT(data->args.inode),
6439 .rpc_message = &msg,
6440 .callback_ops = &nfs4_layoutcommit_ops,
6441 .callback_data = data,
6442 .flags = RPC_TASK_ASYNC,
6443 };
6444 struct rpc_task *task;
6445 int status = 0;
6446
6447 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6448 "lbw: %llu inode %lu\n",
6449 data->task.tk_pid, sync,
6450 data->args.lastbytewritten,
6451 data->args.inode->i_ino);
6452
9d12b216 6453 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6454 task = rpc_run_task(&task_setup_data);
6455 if (IS_ERR(task))
6456 return PTR_ERR(task);
ef311537 6457 if (sync == false)
863a3c6c
AA		 6458 goto out;
6459 status = nfs4_wait_for_completion_rpc_task(task);
6460 if (status != 0)
6461 goto out;
6462 status = task->tk_status;
6463out:
6464 dprintk("%s: status %d\n", __func__, status);
6465 rpc_put_task(task);
6466 return status;
6467}
fca78d6d
BS		 6468
6469static int
6470_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6471 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6472{
6473 struct nfs41_secinfo_no_name_args args = {
6474 .style = SECINFO_STYLE_CURRENT_FH,
6475 };
6476 struct nfs4_secinfo_res res = {
6477 .flavors = flavors,
6478 };
6479 struct rpc_message msg = {
6480 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6481 .rpc_argp = &args,
6482 .rpc_resp = &res,
6483 };
6484 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6485}
6486
6487static int
6488nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6489 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6490{
6491 struct nfs4_exception exception = { };
6492 int err;
6493 do {
6494 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6495 switch (err) {
6496 case 0:
6497 case -NFS4ERR_WRONGSEC:
6498 case -NFS4ERR_NOTSUPP:
05e9cfb4 6499 goto out;
fca78d6d
BS		 6500 default:
6501 err = nfs4_handle_exception(server, err, &exception);
6502 }
6503 } while (exception.retry);
05e9cfb4 6504out:
fca78d6d
BS		 6505 return err;
6506}
6507
6508static int
6509nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6510 struct nfs_fsinfo *info)
6511{
6512 int err;
6513 struct page *page;
6514 rpc_authflavor_t flavor;
6515 struct nfs4_secinfo_flavors *flavors;
6516
6517 page = alloc_page(GFP_KERNEL);
6518 if (!page) {
6519 err = -ENOMEM;
6520 goto out;
6521 }
6522
6523 flavors = page_address(page);
6524 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6525
6526 /*
6527 * Fall back on "guess and check" method if
6528 * the server doesn't support SECINFO_NO_NAME
6529 */
6530 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6531 err = nfs4_find_root_sec(server, fhandle, info);
6532 goto out_freepage;
6533 }
6534 if (err)
6535 goto out_freepage;
6536
6537 flavor = nfs_find_best_sec(flavors);
6538 if (err == 0)
6539 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6540
6541out_freepage:
6542 put_page(page);
6543 if (err == -EACCES)
6544 return -EPERM;
6545out:
6546 return err;
6547}
1cab0652
BS		 6548
6549static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6550{
6551 int status;
6552 struct nfs41_test_stateid_args args = {
1cab0652 6553 .stateid = stateid,
7d974794
BS		 6554 };
6555 struct nfs41_test_stateid_res res;
6556 struct rpc_message msg = {
6557 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6558 .rpc_argp = &args,
6559 .rpc_resp = &res,
6560 };
1cab0652 6561
38527b15 6562 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6563 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
1cab0652 6564 status = nfs4_call_sync_sequence(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
38527b15
CL		 6565 if (status != NFS_OK) {
6566 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6567 return status;
38527b15
CL		 6568 }
6569 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6570 return -res.status;
7d974794
BS		 6571}
6572
38527b15
CL		 6573/**
6574 * nfs41_test_stateid - perform a TEST_STATEID operation
6575 *
6576 * @server: server / transport on which to perform the operation
6577 * @stateid: state ID to test
6578 *
6579 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6580 * Otherwise a negative NFS4ERR value is returned if the operation
6581 * failed or the state ID is not currently valid.
6582 */
1cab0652 6583static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6584{
6585 struct nfs4_exception exception = { };
6586 int err;
6587 do {
377e507d
CL		 6588 err = _nfs41_test_stateid(server, stateid);
6589 if (err != -NFS4ERR_DELAY)
6590 break;
6591 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6592 } while (exception.retry);
6593 return err;
6594}
9aeda35f 6595
1cab0652 6596static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6597{
9aeda35f 6598 struct nfs41_free_stateid_args args = {
1cab0652 6599 .stateid = stateid,
9aeda35f
BS		 6600 };
6601 struct nfs41_free_stateid_res res;
6602 struct rpc_message msg = {
6603 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6604 .rpc_argp = &args,
6605 .rpc_resp = &res,
6606 };
38527b15 6607 int status;
9aeda35f 6608
38527b15 6609 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6610 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
38527b15 6611 status = nfs4_call_sync_sequence(server->client, server, &msg,
377e507d 6612 &args.seq_args, &res.seq_res, 1);
38527b15
CL		 6613 dprintk("NFS reply free_stateid: %d\n", status);
6614 return status;
9aeda35f
BS		 6615}
6616
38527b15
CL		 6617/**
6618 * nfs41_free_stateid - perform a FREE_STATEID operation
6619 *
6620 * @server: server / transport on which to perform the operation
6621 * @stateid: state ID to release
6622 *
6623 * Returns NFS_OK if the server freed "stateid". Otherwise a
6624 * negative NFS4ERR value is returned.
6625 */
1cab0652 6626static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6627{
6628 struct nfs4_exception exception = { };
6629 int err;
6630 do {
377e507d
CL		 6631 err = _nfs4_free_stateid(server, stateid);
6632 if (err != -NFS4ERR_DELAY)
6633 break;
6634 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6635 } while (exception.retry);
6636 return err;
6637}
36281caa
TM		 6638
6639static bool nfs41_match_stateid(const nfs4_stateid *s1,
6640 const nfs4_stateid *s2)
6641{
2d2f24ad 6642 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6643 return false;
6644
2d2f24ad 6645 if (s1->seqid == s2->seqid)
36281caa 6646 return true;
2d2f24ad 6647 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6648 return true;
6649
6650 return false;
6651}
6652
557134a3
AA		 6653#endif /* CONFIG_NFS_V4_1 */
6654
36281caa
TM		 6655static bool nfs4_match_stateid(const nfs4_stateid *s1,
6656 const nfs4_stateid *s2)
6657{
f597c537 6658 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6659}
6660
6661
17280175 6662static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6663 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6664 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6665 .recover_open = nfs4_open_reclaim,
6666 .recover_lock = nfs4_lock_reclaim,
591d71cb 6667 .establish_clid = nfs4_init_clientid,
90a16617 6668 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6669 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6670};
6671
591d71cb 6672#if defined(CONFIG_NFS_V4_1)
17280175 6673static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6674 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6675 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6676 .recover_open = nfs4_open_reclaim,
6677 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6678 .establish_clid = nfs41_init_clientid,
b4b82607 6679 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6680 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6681 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6682};
6683#endif /* CONFIG_NFS_V4_1 */
6684
17280175 6685static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6686 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6687 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6688 .recover_open = nfs4_open_expired,
6689 .recover_lock = nfs4_lock_expired,
6690 .establish_clid = nfs4_init_clientid,
90a16617 6691 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6692};
6693
6694#if defined(CONFIG_NFS_V4_1)
17280175 6695static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6696 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6697 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6698 .recover_open = nfs41_open_expired,
6699 .recover_lock = nfs41_lock_expired,
4d643d1d 6700 .establish_clid = nfs41_init_clientid,
b4b82607 6701 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6702};
591d71cb 6703#endif /* CONFIG_NFS_V4_1 */
1da177e4 6704
17280175 6705static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6706 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6707 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6708 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6709};
6710
6711#if defined(CONFIG_NFS_V4_1)
17280175 6712static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6713 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6714 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6715 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6716};
6717#endif
6718
97dc1359
TM		 6719static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6720 .minor_version = 0,
6721 .call_sync = _nfs4_call_sync,
36281caa 6722 .match_stateid = nfs4_match_stateid,
fca78d6d 6723 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6724 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6725 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6726 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6727};
6728
6729#if defined(CONFIG_NFS_V4_1)
6730static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6731 .minor_version = 1,
6732 .call_sync = _nfs4_call_sync_session,
36281caa 6733 .match_stateid = nfs41_match_stateid,
fca78d6d 6734 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6735 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6736 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6737 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6738};
6739#endif
6740
97dc1359
TM		 6741const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6742 [0] = &nfs_v4_0_minor_ops,
6743#if defined(CONFIG_NFS_V4_1)
6744 [1] = &nfs_v4_1_minor_ops,
6745#endif
6746};
6747
73a79706
BS		 6748const struct inode_operations nfs4_dir_inode_operations = {
6749 .create = nfs_create,
6750 .lookup = nfs_lookup,
6751 .atomic_open = nfs_atomic_open,
6752 .link = nfs_link,
6753 .unlink = nfs_unlink,
6754 .symlink = nfs_symlink,
6755 .mkdir = nfs_mkdir,
6756 .rmdir = nfs_rmdir,
6757 .mknod = nfs_mknod,
6758 .rename = nfs_rename,
6759 .permission = nfs_permission,
6760 .getattr = nfs_getattr,
6761 .setattr = nfs_setattr,
6762 .getxattr = generic_getxattr,
6763 .setxattr = generic_setxattr,
6764 .listxattr = generic_listxattr,
6765 .removexattr = generic_removexattr,
6766};
6767
92e1d5be 6768static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6769 .permission = nfs_permission,
6770 .getattr = nfs_getattr,
6771 .setattr = nfs_setattr,
64c2ce8b
AK		 6772 .getxattr = generic_getxattr,
6773 .setxattr = generic_setxattr,
6774 .listxattr = generic_listxattr,
6775 .removexattr = generic_removexattr,
6b3b5496
BF		 6776};
6777
509de811 6778const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6779 .version = 4, /* protocol version */
6780 .dentry_ops = &nfs4_dentry_operations,
6781 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6782 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6783 .file_ops = &nfs4_file_operations,
1da177e4 6784 .getroot = nfs4_proc_get_root,
281cad46 6785 .submount = nfs4_submount,
ff9099f2 6786 .try_mount = nfs4_try_mount,
1da177e4
LT		 6787 .getattr = nfs4_proc_getattr,
6788 .setattr = nfs4_proc_setattr,
6789 .lookup = nfs4_proc_lookup,
6790 .access = nfs4_proc_access,
6791 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6792 .create = nfs4_proc_create,
6793 .remove = nfs4_proc_remove,
6794 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6795 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6796 .unlink_done = nfs4_proc_unlink_done,
6797 .rename = nfs4_proc_rename,
d3d4152a 6798 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6799 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6800 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6801 .link = nfs4_proc_link,
6802 .symlink = nfs4_proc_symlink,
6803 .mkdir = nfs4_proc_mkdir,
6804 .rmdir = nfs4_proc_remove,
6805 .readdir = nfs4_proc_readdir,
6806 .mknod = nfs4_proc_mknod,
6807 .statfs = nfs4_proc_statfs,
6808 .fsinfo = nfs4_proc_fsinfo,
6809 .pathconf = nfs4_proc_pathconf,
e9326dca 6810 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6811 .decode_dirent = nfs4_decode_dirent,
6812 .read_setup = nfs4_proc_read_setup,
1abb5088 6813 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 6814 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6815 .read_done = nfs4_read_done,
1da177e4 6816 .write_setup = nfs4_proc_write_setup,
57208fa7 6817 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 6818 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6819 .write_done = nfs4_write_done,
1da177e4 6820 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 6821 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 6822 .commit_done = nfs4_commit_done,
1da177e4 6823 .lock = nfs4_proc_lock,
e50a1c2e 6824 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6825 .close_context = nfs4_close_context,
2b484297 6826 .open_context = nfs4_atomic_open,
011e2a7f 6827 .have_delegation = nfs4_have_delegation,
57ec14c5 6828 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 6829 .alloc_client = nfs4_alloc_client,
45a52a02 6830 .init_client = nfs4_init_client,
cdb7eced 6831 .free_client = nfs4_free_client,
1179acc6
BS		 6832 .create_server = nfs4_create_server,
6833 .clone_server = nfs_clone_server,
1da177e4
LT		 6834};
6835
64c2ce8b
AK		 6836static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6837 .prefix = XATTR_NAME_NFSV4_ACL,
6838 .list = nfs4_xattr_list_nfs4_acl,
6839 .get = nfs4_xattr_get_nfs4_acl,
6840 .set = nfs4_xattr_set_nfs4_acl,
6841};
6842
6843const struct xattr_handler *nfs4_xattr_handlers[] = {
6844 &nfs4_xattr_nfs4_acl_handler,
6845 NULL
6846};
6847
1da177e4
LT		 6848/*
6849 * Local variables:
6850 * c-basic-offset: 8
6851 * End:
6852 */
Linux 6.x block layer and io_uring tree(s)