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NFSv4: Fix CB_RECALL_ANY to only return delegations that are not in use
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4
LT		 68
69#define NFSDBG_FACILITY NFSDBG_PROC
70
2066fe89 71#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 72#define NFS4_POLL_RETRY_MAX (15*HZ)
73
cdd4e68b 74struct nfs4_opendata;
864472e9 75static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 76static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 77static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 78static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
81934ddb 79static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
bae36241 80static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *);
9936781d 81static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr);
0ab64e0e
TM		 82static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
83 struct nfs_fattr *fattr, struct iattr *sattr,
84 struct nfs4_state *state);
f062eb6c 85#ifdef CONFIG_NFS_V4_1
1cab0652
BS		 86static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *);
87static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *);
f062eb6c 88#endif
1da177e4 89/* Prevent leaks of NFSv4 errors into userland */
46f72f57 90static int nfs4_map_errors(int err)
1da177e4 91{
52567b03
TM		 92 if (err >= -1000)
93 return err;
94 switch (err) {
95 case -NFS4ERR_RESOURCE:
30005121
WAA		 96 case -NFS4ERR_LAYOUTTRYLATER:
97 case -NFS4ERR_RECALLCONFLICT:
52567b03 98 return -EREMOTEIO;
7ebb9315
BS		 99 case -NFS4ERR_WRONGSEC:
100 return -EPERM;
3ddeb7c5
TM		 101 case -NFS4ERR_BADOWNER:
102 case -NFS4ERR_BADNAME:
103 return -EINVAL;
fb13bfa7
TM		 104 case -NFS4ERR_SHARE_DENIED:
105 return -EACCES;
f25efd85
SD		 106 case -NFS4ERR_MINOR_VERS_MISMATCH:
107 return -EPROTONOSUPPORT;
6168f62c
WAA		 108 case -NFS4ERR_ACCESS:
109 return -EACCES;
6e3cf241
TM		 110 case -NFS4ERR_FILE_OPEN:
111 return -EBUSY;
52567b03 112 default:
1da177e4 113 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 114 __func__, -err);
52567b03 115 break;
1da177e4 116 }
52567b03 117 return -EIO;
1da177e4
LT		 118}
119
120/*
121 * This is our standard bitmap for GETATTR requests.
122 */
1549210f 123const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 124 FATTR4_WORD0_TYPE
125 | FATTR4_WORD0_CHANGE
126 | FATTR4_WORD0_SIZE
127 | FATTR4_WORD0_FSID
128 | FATTR4_WORD0_FILEID,
129 FATTR4_WORD1_MODE
130 | FATTR4_WORD1_NUMLINKS
131 | FATTR4_WORD1_OWNER
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
138};
139
1549210f
TM		 140static const u32 nfs4_pnfs_open_bitmap[3] = {
141 FATTR4_WORD0_TYPE
142 | FATTR4_WORD0_CHANGE
143 | FATTR4_WORD0_SIZE
144 | FATTR4_WORD0_FSID
145 | FATTR4_WORD0_FILEID,
146 FATTR4_WORD1_MODE
147 | FATTR4_WORD1_NUMLINKS
148 | FATTR4_WORD1_OWNER
149 | FATTR4_WORD1_OWNER_GROUP
150 | FATTR4_WORD1_RAWDEV
151 | FATTR4_WORD1_SPACE_USED
152 | FATTR4_WORD1_TIME_ACCESS
153 | FATTR4_WORD1_TIME_METADATA
154 | FATTR4_WORD1_TIME_MODIFY,
155 FATTR4_WORD2_MDSTHRESHOLD
156};
157
e23008ec
AA		 158static const u32 nfs4_open_noattr_bitmap[3] = {
159 FATTR4_WORD0_TYPE
160 | FATTR4_WORD0_CHANGE
161 | FATTR4_WORD0_FILEID,
162};
163
1da177e4
LT		 164const u32 nfs4_statfs_bitmap[2] = {
165 FATTR4_WORD0_FILES_AVAIL
166 | FATTR4_WORD0_FILES_FREE
167 | FATTR4_WORD0_FILES_TOTAL,
168 FATTR4_WORD1_SPACE_AVAIL
169 | FATTR4_WORD1_SPACE_FREE
170 | FATTR4_WORD1_SPACE_TOTAL
171};
172
4ce79717 173const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 174 FATTR4_WORD0_MAXLINK
175 | FATTR4_WORD0_MAXNAME,
176 0
177};
178
dae100c2 179const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 180 | FATTR4_WORD0_MAXREAD
181 | FATTR4_WORD0_MAXWRITE
182 | FATTR4_WORD0_LEASE_TIME,
55b6e774 183 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 184 | FATTR4_WORD1_FS_LAYOUT_TYPES,
185 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 186};
187
830b8e33
MN		 188const u32 nfs4_fs_locations_bitmap[2] = {
189 FATTR4_WORD0_TYPE
190 | FATTR4_WORD0_CHANGE
191 | FATTR4_WORD0_SIZE
192 | FATTR4_WORD0_FSID
193 | FATTR4_WORD0_FILEID
194 | FATTR4_WORD0_FS_LOCATIONS,
195 FATTR4_WORD1_MODE
196 | FATTR4_WORD1_NUMLINKS
197 | FATTR4_WORD1_OWNER
198 | FATTR4_WORD1_OWNER_GROUP
199 | FATTR4_WORD1_RAWDEV
200 | FATTR4_WORD1_SPACE_USED
201 | FATTR4_WORD1_TIME_ACCESS
202 | FATTR4_WORD1_TIME_METADATA
203 | FATTR4_WORD1_TIME_MODIFY
204 | FATTR4_WORD1_MOUNTED_ON_FILEID
205};
206
bc4785cd 207static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 208 struct nfs4_readdir_arg *readdir)
209{
0dbb4c67 210 __be32 *start, *p;
1da177e4 211
1da177e4 212 if (cookie > 2) {
b7ef1956 213 readdir->cookie = cookie;
1da177e4
LT		 214 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
215 return;
216 }
217
218 readdir->cookie = 0;
219 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
220 if (cookie == 2)
221 return;
222
223 /*
224 * NFSv4 servers do not return entries for '.' and '..'
225 * Therefore, we fake these entries here. We let '.'
226 * have cookie 0 and '..' have cookie 1. Note that
227 * when talking to the server, we always send cookie 0
228 * instead of 1 or 2.
229 */
2b86ce2d 230 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 231
232 if (cookie == 0) {
233 *p++ = xdr_one; /* next */
234 *p++ = xdr_zero; /* cookie, first word */
235 *p++ = xdr_one; /* cookie, second word */
236 *p++ = xdr_one; /* entry len */
237 memcpy(p, ".\0\0\0", 4); /* entry */
238 p++;
239 *p++ = xdr_one; /* bitmap length */
240 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
241 *p++ = htonl(8); /* attribute buffer length */
4e769b93 242 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 243 }
244
245 *p++ = xdr_one; /* next */
246 *p++ = xdr_zero; /* cookie, first word */
247 *p++ = xdr_two; /* cookie, second word */
248 *p++ = xdr_two; /* entry len */
249 memcpy(p, "..\0\0", 4); /* entry */
250 p++;
251 *p++ = xdr_one; /* bitmap length */
252 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
253 *p++ = htonl(8); /* attribute buffer length */
4e769b93 254 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 255
256 readdir->pgbase = (char *)p - (char *)start;
257 readdir->count -= readdir->pgbase;
2b86ce2d 258 kunmap_atomic(start);
1da177e4
LT		 259}
260
65de872e
TM		 261static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
262{
263 int res = 0;
264
265 might_sleep();
266
267 if (*timeout <= 0)
268 *timeout = NFS4_POLL_RETRY_MIN;
269 if (*timeout > NFS4_POLL_RETRY_MAX)
270 *timeout = NFS4_POLL_RETRY_MAX;
d310310c 271 freezable_schedule_timeout_killable(*timeout);
65de872e
TM		 272 if (fatal_signal_pending(current))
273 res = -ERESTARTSYS;
274 *timeout <<= 1;
275 return res;
276}
277
278/* This is the error handling routine for processes that are allowed
279 * to sleep.
280 */
b064eca2 281static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 282{
283 struct nfs_client *clp = server->nfs_client;
9e33bed5 284 struct nfs4_state *state = exception->state;
3114ea7a 285 struct inode *inode = exception->inode;
65de872e
TM		 286 int ret = errorcode;
287
288 exception->retry = 0;
289 switch(errorcode) {
290 case 0:
291 return 0;
3114ea7a 292 case -NFS4ERR_OPENMODE:
011e2a7f 293 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 294 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 295 exception->retry = 1;
296 return 0;
297 }
298 if (state == NULL)
299 break;
5d422301
TM		 300 ret = nfs4_schedule_stateid_recovery(server, state);
301 if (ret < 0)
302 break;
3114ea7a 303 goto wait_on_recovery;
a1d0b5ee 304 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 305 case -NFS4ERR_ADMIN_REVOKED:
306 case -NFS4ERR_BAD_STATEID:
9e33bed5
TM		 307 if (state == NULL)
308 break;
14977489 309 nfs_remove_bad_delegation(state->inode);
5d422301
TM		 310 ret = nfs4_schedule_stateid_recovery(server, state);
311 if (ret < 0)
312 break;
0400a6b0 313 goto wait_on_recovery;
0ced63d1 314 case -NFS4ERR_EXPIRED:
5d422301
TM		 315 if (state != NULL) {
316 ret = nfs4_schedule_stateid_recovery(server, state);
317 if (ret < 0)
318 break;
319 }
65de872e 320 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 321 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 322 nfs4_schedule_lease_recovery(clp);
323 goto wait_on_recovery;
03391693 324#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 325 case -NFS4ERR_BADSESSION:
326 case -NFS4ERR_BADSLOT:
327 case -NFS4ERR_BAD_HIGH_SLOT:
328 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
329 case -NFS4ERR_DEADSESSION:
330 case -NFS4ERR_SEQ_FALSE_RETRY:
331 case -NFS4ERR_SEQ_MISORDERED:
332 dprintk("%s ERROR: %d Reset session\n", __func__,
333 errorcode);
9f594791 334 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 335 goto wait_on_recovery;
03391693 336#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 337 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 338 if (exception->timeout > HZ) {
339 /* We have retried a decent amount, time to
340 * fail
341 */
342 ret = -EBUSY;
343 break;
344 }
65de872e
TM		 345 case -NFS4ERR_GRACE:
346 case -NFS4ERR_DELAY:
347 ret = nfs4_delay(server->client, &exception->timeout);
348 if (ret != 0)
349 break;
a8a4ae3a 350 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 351 case -NFS4ERR_OLD_STATEID:
352 exception->retry = 1;
b064eca2
TM		 353 break;
354 case -NFS4ERR_BADOWNER:
355 /* The following works around a Linux server bug! */
356 case -NFS4ERR_BADNAME:
357 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
358 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
359 exception->retry = 1;
360 printk(KERN_WARNING "NFS: v4 server %s "
361 "does not accept raw "
362 "uid/gids. "
363 "Reenabling the idmapper.\n",
364 server->nfs_client->cl_hostname);
365 }
65de872e
TM		 366 }
367 /* We failed to handle the error */
368 return nfs4_map_errors(ret);
0400a6b0 369wait_on_recovery:
a2c0b9e2
TM		 370 ret = nfs4_wait_clnt_recover(clp);
371 if (ret == 0)
372 exception->retry = 1;
373 return ret;
65de872e
TM		 374}
375
376
452e9352 377static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 378{
1da177e4
LT		 379 spin_lock(&clp->cl_lock);
380 if (time_before(clp->cl_last_renewal,timestamp))
381 clp->cl_last_renewal = timestamp;
382 spin_unlock(&clp->cl_lock);
383}
384
452e9352
TM		 385static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
386{
387 do_renew_lease(server->nfs_client, timestamp);
388}
389
cccef3b9
AA		 390#if defined(CONFIG_NFS_V4_1)
391
d185a334 392static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 393{
e3725ec0 394 struct nfs4_session *session;
13615871 395 struct nfs4_slot_table *tbl;
c10e4498 396 bool send_new_highest_used_slotid = false;
13615871 397
dfb4f309 398 if (!res->sr_slot) {
13615871
AA		 399 /* just wake up the next guy waiting since
400 * we may have not consumed a slot after all */
691daf3b 401 dprintk("%s: No slot\n", __func__);
35dc1d74 402 return;
13615871 403 }
e3725ec0
TM		 404 tbl = res->sr_slot->table;
405 session = tbl->session;
ea028ac9 406
35dc1d74 407 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 408 /* Be nice to the server: try to ensure that the last transmitted
409 * value for highest_user_slotid <= target_highest_slotid
410 */
411 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
412 send_new_highest_used_slotid = true;
413
b75ad4cd
TM		 414 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
415 send_new_highest_used_slotid = false;
416 goto out_unlock;
417 }
f4af6e2a 418 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 419
420 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
421 send_new_highest_used_slotid = false;
b75ad4cd 422out_unlock:
35dc1d74 423 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 424 res->sr_slot = NULL;
c10e4498
TM		 425 if (send_new_highest_used_slotid)
426 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 427}
428
14516c3a 429static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 430{
e3725ec0 431 struct nfs4_session *session;
933602e3 432 struct nfs4_slot *slot;
14516c3a 433 struct nfs_client *clp;
ac20d163 434 bool interrupted = false;
85563073 435 int ret = 1;
b0df806c 436
468f8613
BS		 437 /* don't increment the sequence number if the task wasn't sent */
438 if (!RPC_WAS_SENT(task))
b0df806c
AA		 439 goto out;
440
933602e3 441 slot = res->sr_slot;
e3725ec0 442 session = slot->table->session;
933602e3 443
ac20d163
TM		 444 if (slot->interrupted) {
445 slot->interrupted = 0;
446 interrupted = true;
447 }
448
691daf3b 449 /* Check the SEQUENCE operation status */
14516c3a
TM		 450 switch (res->sr_status) {
451 case 0:
b0df806c 452 /* Update the slot's sequence and clientid lease timer */
933602e3 453 ++slot->seq_nr;
e3725ec0 454 clp = session->clp;
8e63b6a8 455 do_renew_lease(clp, res->sr_timestamp);
0629e370 456 /* Check sequence flags */
b4410c2f
TM		 457 if (res->sr_status_flags != 0)
458 nfs4_schedule_lease_recovery(clp);
464ee9f9 459 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 460 break;
ac20d163
TM		 461 case 1:
462 /*
463 * sr_status remains 1 if an RPC level error occurred.
464 * The server may or may not have processed the sequence
465 * operation..
466 * Mark the slot as having hosted an interrupted RPC call.
467 */
468 slot->interrupted = 1;
469 goto out;
14516c3a
TM		 470 case -NFS4ERR_DELAY:
471 /* The server detected a resend of the RPC call and
472 * returned NFS4ERR_DELAY as per Section 2.10.6.2
473 * of RFC5661.
474 */
df2fabff 475 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 476 __func__,
df2fabff 477 slot->slot_nr,
933602e3 478 slot->seq_nr);
14516c3a 479 goto out_retry;
85563073
TM		 480 case -NFS4ERR_BADSLOT:
481 /*
482 * The slot id we used was probably retired. Try again
483 * using a different slot id.
484 */
e8794440
TM		 485 goto retry_nowait;
486 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 487 /*
488 * Was the last operation on this sequence interrupted?
489 * If so, retry after bumping the sequence number.
490 */
491 if (interrupted) {
492 ++slot->seq_nr;
493 goto retry_nowait;
494 }
e8794440
TM		 495 /*
496 * Could this slot have been previously retired?
497 * If so, then the server may be expecting seq_nr = 1!
498 */
8e63b6a8
TM		 499 if (slot->seq_nr != 1) {
500 slot->seq_nr = 1;
501 goto retry_nowait;
502 }
503 break;
e8794440
TM		 504 case -NFS4ERR_SEQ_FALSE_RETRY:
505 ++slot->seq_nr;
506 goto retry_nowait;
14516c3a
TM		 507 default:
508 /* Just update the slot sequence no. */
933602e3 509 ++slot->seq_nr;
b0df806c
AA		 510 }
511out:
512 /* The session may be reset by one of the error handlers. */
513 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 514 nfs41_sequence_free_slot(res);
85563073 515 return ret;
e8794440
TM		 516retry_nowait:
517 if (rpc_restart_call_prepare(task)) {
518 task->tk_status = 0;
519 ret = 0;
520 }
521 goto out;
14516c3a 522out_retry:
d05dd4e9 523 if (!rpc_restart_call(task))
14516c3a
TM		 524 goto out;
525 rpc_delay(task, NFS4_POLL_RETRY_MAX);
526 return 0;
b0df806c
AA		 527}
528
14516c3a
TM		 529static int nfs4_sequence_done(struct rpc_task *task,
530 struct nfs4_sequence_res *res)
df896455 531{
e3725ec0 532 if (res->sr_slot == NULL)
14516c3a
TM		 533 return 1;
534 return nfs41_sequence_done(task, res);
df896455
TM		 535}
536
9d12b216
TM		 537static void nfs41_init_sequence(struct nfs4_sequence_args *args,
538 struct nfs4_sequence_res *res, int cache_reply)
539{
2b2fa717 540 args->sa_slot = NULL;
9d12b216 541 args->sa_cache_this = 0;
8fe72bac 542 args->sa_privileged = 0;
9d12b216
TM		 543 if (cache_reply)
544 args->sa_cache_this = 1;
9d12b216
TM		 545 res->sr_slot = NULL;
546}
547
8fe72bac
TM		 548static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
549{
550 args->sa_privileged = 1;
551}
552
dc70d7b3 553int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 554 struct nfs4_sequence_args *args,
555 struct nfs4_sequence_res *res,
ce5039c1
AA		 556 struct rpc_task *task)
557{
fbcd4abc
AA		 558 struct nfs4_slot *slot;
559 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 560
561 dprintk("--> %s\n", __func__);
ce5039c1 562 /* slot already allocated? */
dfb4f309 563 if (res->sr_slot != NULL)
d9afbd1b 564 goto out_success;
ce5039c1 565
fbcd4abc
AA		 566 tbl = &session->fc_slot_table;
567
69d206b5
TM		 568 task->tk_timeout = 0;
569
fbcd4abc 570 spin_lock(&tbl->slot_tbl_lock);
a2118c33 571 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
8fe72bac 572 !args->sa_privileged) {
0b1c8fc4 573 /* The state manager will wait until the slot table is empty */
0b1c8fc4 574 dprintk("%s session is draining\n", __func__);
7b939a3f 575 goto out_sleep;
689cf5c1
AB		 576 }
577
2dc03b7f 578 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 579 if (IS_ERR(slot)) {
580 /* If out of memory, try again in 1/4 second */
581 if (slot == ERR_PTR(-ENOMEM))
582 task->tk_timeout = HZ >> 2;
fbcd4abc 583 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 584 goto out_sleep;
fbcd4abc
AA		 585 }
586 spin_unlock(&tbl->slot_tbl_lock);
587
2b2fa717 588 args->sa_slot = slot;
fbcd4abc 589
2dc03b7f
TM		 590 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
591 slot->slot_nr, slot->seq_nr);
fbcd4abc 592
dfb4f309 593 res->sr_slot = slot;
8e63b6a8 594 res->sr_timestamp = jiffies;
2a6e26cd 595 res->sr_status_flags = 0;
fbcd4abc
AA		 596 /*
597 * sr_status is only set in decode_sequence, and so will remain
598 * set to 1 if an rpc level failure occurs.
599 */
600 res->sr_status = 1;
d9afbd1b
TM		 601out_success:
602 rpc_call_start(task);
ce5039c1 603 return 0;
7b939a3f 604out_sleep:
8fe72bac
TM		 605 /* Privileged tasks are queued with top priority */
606 if (args->sa_privileged)
1e1093c7
TM		 607 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
608 NULL, RPC_PRIORITY_PRIVILEGED);
609 else
610 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 611 spin_unlock(&tbl->slot_tbl_lock);
612 return -EAGAIN;
ce5039c1 613}
dc70d7b3 614EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 615
035168ab 616int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 617 struct nfs4_sequence_args *args,
618 struct nfs4_sequence_res *res,
ce5039c1
AA		 619 struct rpc_task *task)
620{
035168ab 621 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 622 int ret = 0;
623
d9afbd1b
TM		 624 if (session == NULL) {
625 rpc_call_start(task);
035168ab 626 goto out;
d9afbd1b 627 }
035168ab 628
df2fabff 629 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 630 __func__, session->clp, session, res->sr_slot ?
df2fabff 631 res->sr_slot->slot_nr : -1);
ce5039c1 632
9d12b216 633 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 634out:
635 dprintk("<-- %s status=%d\n", __func__, ret);
636 return ret;
637}
638
639struct nfs41_call_sync_data {
035168ab 640 const struct nfs_server *seq_server;
ce5039c1
AA		 641 struct nfs4_sequence_args *seq_args;
642 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 643};
644
645static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
646{
647 struct nfs41_call_sync_data *data = calldata;
6ba7db34 648 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 649
035168ab
TM		 650 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
651
d9afbd1b 652 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 653}
654
69ab40c4
AA		 655static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
656{
657 struct nfs41_call_sync_data *data = calldata;
658
14516c3a 659 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 660}
661
17280175 662static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 663 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 664 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 665};
666
7c513058
BS		 667static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
668 struct nfs_server *server,
ce5039c1
AA		 669 struct rpc_message *msg,
670 struct nfs4_sequence_args *args,
8fe72bac 671 struct nfs4_sequence_res *res)
ce5039c1
AA		 672{
673 int ret;
674 struct rpc_task *task;
675 struct nfs41_call_sync_data data = {
035168ab 676 .seq_server = server,
ce5039c1
AA		 677 .seq_args = args,
678 .seq_res = res,
ce5039c1
AA		 679 };
680 struct rpc_task_setup task_setup = {
7c513058 681 .rpc_client = clnt,
ce5039c1
AA		 682 .rpc_message = msg,
683 .callback_ops = &nfs41_call_sync_ops,
684 .callback_data = &data
685 };
686
ce5039c1
AA		 687 task = rpc_run_task(&task_setup);
688 if (IS_ERR(task))
689 ret = PTR_ERR(task);
690 else {
691 ret = task->tk_status;
692 rpc_put_task(task);
693 }
694 return ret;
695}
696
df896455 697#else
8fe72bac 698static
9d12b216
TM		 699void nfs41_init_sequence(struct nfs4_sequence_args *args,
700 struct nfs4_sequence_res *res, int cache_reply)
701{
702}
703
8fe72bac
TM		 704static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
705{
706}
707
708
14516c3a
TM		 709static int nfs4_sequence_done(struct rpc_task *task,
710 struct nfs4_sequence_res *res)
df896455 711{
14516c3a 712 return 1;
df896455 713}
cccef3b9
AA		 714#endif /* CONFIG_NFS_V4_1 */
715
fd0c0953 716static
7c513058
BS		 717int _nfs4_call_sync(struct rpc_clnt *clnt,
718 struct nfs_server *server,
cccef3b9
AA		 719 struct rpc_message *msg,
720 struct nfs4_sequence_args *args,
fd0c0953 721 struct nfs4_sequence_res *res)
cccef3b9 722{
7c513058 723 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 724}
725
fd0c0953 726static
7c513058
BS		 727int nfs4_call_sync(struct rpc_clnt *clnt,
728 struct nfs_server *server,
e73b83f2
BS		 729 struct rpc_message *msg,
730 struct nfs4_sequence_args *args,
731 struct nfs4_sequence_res *res,
732 int cache_reply)
733{
fd0c0953 734 nfs41_init_sequence(args, res, cache_reply);
7c513058 735 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
fd0c0953 736 args, res);
e73b83f2 737}
cccef3b9 738
38478b24 739static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 740{
38478b24 741 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 742
38478b24 743 spin_lock(&dir->i_lock);
359d7d1c 744 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 745 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 746 nfs_force_lookup_revalidate(dir);
a9a4a87a 747 dir->i_version = cinfo->after;
de242c0b 748 nfs_fscache_invalidate(dir);
38478b24 749 spin_unlock(&dir->i_lock);
1da177e4
LT		 750}
751
e56e0b78 752struct nfs4_opendata {
c6d00e63 753 struct kref kref;
e56e0b78
TM		 754 struct nfs_openargs o_arg;
755 struct nfs_openres o_res;
cdd4e68b
TM		 756 struct nfs_open_confirmargs c_arg;
757 struct nfs_open_confirmres c_res;
6926afd1
TM		 758 struct nfs4_string owner_name;
759 struct nfs4_string group_name;
e56e0b78 760 struct nfs_fattr f_attr;
e56e0b78 761 struct dentry *dir;
82a2c1b7 762 struct dentry *dentry;
e56e0b78 763 struct nfs4_state_owner *owner;
aac00a8d 764 struct nfs4_state *state;
e56e0b78 765 struct iattr attrs;
26e976a8 766 unsigned long timestamp;
3e309914 767 unsigned int rpc_done : 1;
24ac23ab
TM		 768 int rpc_status;
769 int cancelled;
e56e0b78
TM		 770};
771
49f9a0fa
TM		 772static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
773 int err, struct nfs4_exception *exception)
774{
775 if (err != -EINVAL)
776 return false;
777 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
778 return false;
779 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
780 exception->retry = 1;
781 return true;
782}
783
784static enum open_claim_type4
785nfs4_map_atomic_open_claim(struct nfs_server *server,
786 enum open_claim_type4 claim)
787{
788 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
789 return claim;
790 switch (claim) {
791 default:
792 return claim;
793 case NFS4_OPEN_CLAIM_FH:
794 return NFS4_OPEN_CLAIM_NULL;
795 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
796 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
797 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
798 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
799 }
800}
2ced46c2
TM		 801
802static void nfs4_init_opendata_res(struct nfs4_opendata *p)
803{
804 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 805 p->o_res.seqid = p->o_arg.seqid;
806 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 807 p->o_res.server = p->o_arg.server;
5f657530 808 p->o_res.access_request = p->o_arg.access;
2ced46c2 809 nfs_fattr_init(&p->f_attr);
6926afd1 810 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 811}
812
82a2c1b7 813static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 814 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 815 const struct iattr *attrs,
4a1c0893 816 enum open_claim_type4 claim,
8535b2be 817 gfp_t gfp_mask)
e56e0b78 818{
82a2c1b7 819 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 820 struct inode *dir = parent->d_inode;
821 struct nfs_server *server = NFS_SERVER(dir);
822 struct nfs4_opendata *p;
823
8535b2be 824 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 825 if (p == NULL)
826 goto err;
8535b2be 827 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 828 if (p->o_arg.seqid == NULL)
829 goto err_free;
82a2c1b7
AV		 830 nfs_sb_active(dentry->d_sb);
831 p->dentry = dget(dentry);
e56e0b78
TM		 832 p->dir = parent;
833 p->owner = sp;
834 atomic_inc(&sp->so_count);
dc0b027d
TM		 835 p->o_arg.open_flags = flags;
836 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 837 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
838 * will return permission denied for all bits until close */
839 if (!(flags & O_EXCL)) {
840 /* ask server to check for all possible rights as results
841 * are cached */
842 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
843 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 844 }
7539bbab 845 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 846 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
847 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 848 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 849 p->o_arg.server = server;
850 p->o_arg.bitmask = server->attr_bitmask;
1549210f 851 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
49f9a0fa
TM		 852 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
853 switch (p->o_arg.claim) {
4a1c0893
TM		 854 case NFS4_OPEN_CLAIM_NULL:
855 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
856 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
857 p->o_arg.fh = NFS_FH(dir);
858 break;
859 case NFS4_OPEN_CLAIM_PREVIOUS:
860 case NFS4_OPEN_CLAIM_FH:
861 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
862 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
863 p->o_arg.fh = NFS_FH(dentry->d_inode);
864 }
536e43d1 865 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 866 __be32 verf[2];
d77d76ff 867
e56e0b78
TM		 868 p->o_arg.u.attrs = &p->attrs;
869 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 870
871 verf[0] = jiffies;
872 verf[1] = current->pid;
873 memcpy(p->o_arg.u.verifier.data, verf,
874 sizeof(p->o_arg.u.verifier.data));
e56e0b78 875 }
cdd4e68b
TM		 876 p->c_arg.fh = &p->o_res.fh;
877 p->c_arg.stateid = &p->o_res.stateid;
878 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 879 nfs4_init_opendata_res(p);
c6d00e63 880 kref_init(&p->kref);
e56e0b78
TM		 881 return p;
882err_free:
883 kfree(p);
884err:
885 dput(parent);
886 return NULL;
887}
888
c6d00e63 889static void nfs4_opendata_free(struct kref *kref)
e56e0b78 890{
c6d00e63
TM		 891 struct nfs4_opendata *p = container_of(kref,
892 struct nfs4_opendata, kref);
82a2c1b7 893 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 894
895 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 896 if (p->state != NULL)
897 nfs4_put_open_state(p->state);
c6d00e63
TM		 898 nfs4_put_state_owner(p->owner);
899 dput(p->dir);
82a2c1b7
AV		 900 dput(p->dentry);
901 nfs_sb_deactive(sb);
6926afd1 902 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 903 kfree(p);
904}
905
906static void nfs4_opendata_put(struct nfs4_opendata *p)
907{
908 if (p != NULL)
909 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 910}
911
06f814a3
TM		 912static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
913{
06f814a3
TM		 914 int ret;
915
06f814a3 916 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 917 return ret;
918}
919
dc0b027d 920static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 921{
922 int ret = 0;
dc0b027d 923
536e43d1 924 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 925 goto out;
926 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 927 case FMODE_READ:
88069f77
TM		 928 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
929 && state->n_rdonly != 0;
6ee41268
TM		 930 break;
931 case FMODE_WRITE:
88069f77
TM		 932 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
933 && state->n_wronly != 0;
6ee41268
TM		 934 break;
935 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 936 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
937 && state->n_rdwr != 0;
6ee41268 938 }
dc0b027d 939out:
6ee41268
TM		 940 return ret;
941}
942
dc0b027d 943static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 944{
652f89f6
TM		 945 if (delegation == NULL)
946 return 0;
dc0b027d 947 if ((delegation->type & fmode) != fmode)
aac00a8d 948 return 0;
15c831bf 949 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 950 return 0;
d25be546
TM		 951 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
952 return 0;
b7391f44 953 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 954 return 1;
955}
956
dc0b027d 957static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 958{
dc0b027d 959 switch (fmode) {
e7616923
TM		 960 case FMODE_WRITE:
961 state->n_wronly++;
962 break;
963 case FMODE_READ:
964 state->n_rdonly++;
965 break;
966 case FMODE_READ|FMODE_WRITE:
967 state->n_rdwr++;
968 }
dc0b027d 969 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 970}
971
dc0b027d 972static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 973{
974 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 975 nfs4_stateid_copy(&state->stateid, stateid);
976 nfs4_stateid_copy(&state->open_stateid, stateid);
dc0b027d 977 switch (fmode) {
003707c7
TM		 978 case FMODE_READ:
979 set_bit(NFS_O_RDONLY_STATE, &state->flags);
980 break;
981 case FMODE_WRITE:
982 set_bit(NFS_O_WRONLY_STATE, &state->flags);
983 break;
984 case FMODE_READ|FMODE_WRITE:
985 set_bit(NFS_O_RDWR_STATE, &state->flags);
986 }
e7616923
TM		 987}
988
dc0b027d 989static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 990{
8bda4e4c 991 write_seqlock(&state->seqlock);
dc0b027d 992 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 993 write_sequnlock(&state->seqlock);
003707c7
TM		 994}
995
dc0b027d 996static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 997{
8bda4e4c
TM		 998 /*
999 * Protect the call to nfs4_state_set_mode_locked and
1000 * serialise the stateid update
1001 */
1002 write_seqlock(&state->seqlock);
003707c7 1003 if (deleg_stateid != NULL) {
f597c537 1004 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1005 set_bit(NFS_DELEGATED_STATE, &state->flags);
1006 }
1007 if (open_stateid != NULL)
dc0b027d 1008 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1009 write_sequnlock(&state->seqlock);
1010 spin_lock(&state->owner->so_lock);
dc0b027d 1011 update_open_stateflags(state, fmode);
ec073428 1012 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1013}
1014
dc0b027d 1015static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1016{
1017 struct nfs_inode *nfsi = NFS_I(state->inode);
1018 struct nfs_delegation *deleg_cur;
1019 int ret = 0;
1020
dc0b027d 1021 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1022
1023 rcu_read_lock();
1024 deleg_cur = rcu_dereference(nfsi->delegation);
1025 if (deleg_cur == NULL)
1026 goto no_delegation;
1027
1028 spin_lock(&deleg_cur->lock);
1029 if (nfsi->delegation != deleg_cur ||
d25be546 1030 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1031 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1032 goto no_delegation_unlock;
1033
1034 if (delegation == NULL)
1035 delegation = &deleg_cur->stateid;
f597c537 1036 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1037 goto no_delegation_unlock;
1038
b7391f44 1039 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1040 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1041 ret = 1;
1042no_delegation_unlock:
1043 spin_unlock(&deleg_cur->lock);
1044no_delegation:
1045 rcu_read_unlock();
1046
1047 if (!ret && open_stateid != NULL) {
dc0b027d 1048 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1049 ret = 1;
1050 }
1051
1052 return ret;
1053}
1054
1055
dc0b027d 1056static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1057{
1058 struct nfs_delegation *delegation;
1059
1060 rcu_read_lock();
1061 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1062 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1063 rcu_read_unlock();
1064 return;
1065 }
1066 rcu_read_unlock();
57ec14c5 1067 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1068}
1069
6ee41268 1070static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1071{
1072 struct nfs4_state *state = opendata->state;
1073 struct nfs_inode *nfsi = NFS_I(state->inode);
1074 struct nfs_delegation *delegation;
536e43d1 1075 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1076 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1077 nfs4_stateid stateid;
1078 int ret = -EAGAIN;
1079
aac00a8d 1080 for (;;) {
dc0b027d 1081 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1082 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1083 if (can_open_cached(state, fmode, open_mode)) {
1084 update_open_stateflags(state, fmode);
6ee41268 1085 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1086 goto out_return_state;
1087 }
1088 spin_unlock(&state->owner->so_lock);
1089 }
34310430
TM		 1090 rcu_read_lock();
1091 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1092 if (!can_open_delegated(delegation, fmode)) {
34310430 1093 rcu_read_unlock();
aac00a8d 1094 break;
34310430 1095 }
aac00a8d 1096 /* Save the delegation */
f597c537 1097 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1098 rcu_read_unlock();
af22f94a 1099 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1100 if (ret != 0)
1101 goto out;
1102 ret = -EAGAIN;
34310430
TM		 1103
1104 /* Try to update the stateid using the delegation */
dc0b027d 1105 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1106 goto out_return_state;
aac00a8d 1107 }
aac00a8d
TM		 1108out:
1109 return ERR_PTR(ret);
1110out_return_state:
1111 atomic_inc(&state->count);
1112 return state;
1113}
1114
e23008ec
AA		 1115static void
1116nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1117{
1118 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1119 struct nfs_delegation *delegation;
1120 int delegation_flags = 0;
1121
1122 rcu_read_lock();
1123 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1124 if (delegation)
1125 delegation_flags = delegation->flags;
1126 rcu_read_unlock();
1127 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1128 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1129 "returning a delegation for "
1130 "OPEN(CLAIM_DELEGATE_CUR)\n",
1131 clp->cl_hostname);
1132 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1133 nfs_inode_set_delegation(state->inode,
1134 data->owner->so_cred,
1135 &data->o_res);
1136 else
1137 nfs_inode_reclaim_delegation(state->inode,
1138 data->owner->so_cred,
1139 &data->o_res);
1140}
1141
1142/*
1143 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1144 * and update the nfs4_state.
1145 */
1146static struct nfs4_state *
1147_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1148{
1149 struct inode *inode = data->state->inode;
1150 struct nfs4_state *state = data->state;
1151 int ret;
1152
1153 if (!data->rpc_done) {
1154 ret = data->rpc_status;
1155 goto err;
1156 }
1157
1158 ret = -ESTALE;
1159 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1160 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1161 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1162 goto err;
1163
1164 ret = -ENOMEM;
1165 state = nfs4_get_open_state(inode, data->owner);
1166 if (state == NULL)
1167 goto err;
1168
1169 ret = nfs_refresh_inode(inode, &data->f_attr);
1170 if (ret)
1171 goto err;
1172
1173 if (data->o_res.delegation_type != 0)
1174 nfs4_opendata_check_deleg(data, state);
1175 update_open_stateid(state, &data->o_res.stateid, NULL,
1176 data->o_arg.fmode);
1177
1178 return state;
1179err:
1180 return ERR_PTR(ret);
1181
1182}
1183
1184static struct nfs4_state *
1185_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1186{
1187 struct inode *inode;
1188 struct nfs4_state *state = NULL;
1b370bc2 1189 int ret;
24ac23ab 1190
aac00a8d 1191 if (!data->rpc_done) {
6ee41268 1192 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1193 goto out;
1194 }
1195
1b370bc2 1196 ret = -EAGAIN;
24ac23ab 1197 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1198 goto err;
24ac23ab 1199 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1200 ret = PTR_ERR(inode);
03f28e3a 1201 if (IS_ERR(inode))
1b370bc2
TM		 1202 goto err;
1203 ret = -ENOMEM;
24ac23ab
TM		 1204 state = nfs4_get_open_state(inode, data->owner);
1205 if (state == NULL)
1b370bc2 1206 goto err_put_inode;
e23008ec
AA		 1207 if (data->o_res.delegation_type != 0)
1208 nfs4_opendata_check_deleg(data, state);
34310430 1209 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1210 data->o_arg.fmode);
24ac23ab 1211 iput(inode);
aac00a8d 1212out:
7aa262b5 1213 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1214 return state;
1b370bc2
TM		 1215err_put_inode:
1216 iput(inode);
1217err:
1218 return ERR_PTR(ret);
24ac23ab
TM		 1219}
1220
e23008ec
AA		 1221static struct nfs4_state *
1222nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1223{
1224 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1225 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1226 return _nfs4_opendata_to_nfs4_state(data);
1227}
1228
864472e9
TM		 1229static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1230{
1231 struct nfs_inode *nfsi = NFS_I(state->inode);
1232 struct nfs_open_context *ctx;
1233
1234 spin_lock(&state->inode->i_lock);
1235 list_for_each_entry(ctx, &nfsi->open_files, list) {
1236 if (ctx->state != state)
1237 continue;
1238 get_nfs_open_context(ctx);
1239 spin_unlock(&state->inode->i_lock);
1240 return ctx;
1241 }
1242 spin_unlock(&state->inode->i_lock);
1243 return ERR_PTR(-ENOENT);
1244}
1245
4a1c0893
TM		 1246static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1247 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1248{
1249 struct nfs4_opendata *opendata;
1250
4a1c0893
TM		 1251 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1252 NULL, claim, GFP_NOFS);
6f220ed5
TM		 1253 if (opendata == NULL)
1254 return ERR_PTR(-ENOMEM);
1255 opendata->state = state;
1256 atomic_inc(&state->count);
1257 return opendata;
1258}
1259
dc0b027d 1260static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1261{
2ced46c2 1262 struct nfs4_state *newstate;
864472e9
TM		 1263 int ret;
1264
dc0b027d
TM		 1265 opendata->o_arg.open_flags = 0;
1266 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1267 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1268 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1269 nfs4_init_opendata_res(opendata);
b257957e 1270 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1271 if (ret != 0)
1272 return ret;
2ced46c2 1273 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1274 if (IS_ERR(newstate))
1275 return PTR_ERR(newstate);
643168c2 1276 nfs4_close_state(newstate, fmode);
2ced46c2 1277 *res = newstate;
864472e9
TM		 1278 return 0;
1279}
1280
1281static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1282{
864472e9 1283 struct nfs4_state *newstate;
864472e9
TM		 1284 int ret;
1285
1286 /* memory barrier prior to reading state->n_* */
2ced46c2 1287 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1288 smp_rmb();
1289 if (state->n_rdwr != 0) {
b0ed9dbc 1290 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1291 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1292 if (ret != 0)
1293 return ret;
2ced46c2
TM		 1294 if (newstate != state)
1295 return -ESTALE;
864472e9
TM		 1296 }
1297 if (state->n_wronly != 0) {
b0ed9dbc 1298 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1299 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1300 if (ret != 0)
1301 return ret;
2ced46c2
TM		 1302 if (newstate != state)
1303 return -ESTALE;
864472e9
TM		 1304 }
1305 if (state->n_rdonly != 0) {
b0ed9dbc 1306 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1307 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1308 if (ret != 0)
1309 return ret;
2ced46c2
TM		 1310 if (newstate != state)
1311 return -ESTALE;
864472e9 1312 }
1ac7e2fd
TM		 1313 /*
1314 * We may have performed cached opens for all three recoveries.
1315 * Check if we need to update the current stateid.
1316 */
1317 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1318 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1319 write_seqlock(&state->seqlock);
1ac7e2fd 1320 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1321 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1322 write_sequnlock(&state->seqlock);
1ac7e2fd 1323 }
864472e9
TM		 1324 return 0;
1325}
1326
1da177e4
LT		 1327/*
1328 * OPEN_RECLAIM:
1329 * reclaim state on the server after a reboot.
1da177e4 1330 */
539cd03a 1331static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1332{
1ac7e2fd 1333 struct nfs_delegation *delegation;
864472e9 1334 struct nfs4_opendata *opendata;
dc0b027d 1335 fmode_t delegation_type = 0;
1da177e4
LT		 1336 int status;
1337
4a1c0893
TM		 1338 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1339 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1340 if (IS_ERR(opendata))
1341 return PTR_ERR(opendata);
1ac7e2fd
TM		 1342 rcu_read_lock();
1343 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1344 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1345 delegation_type = delegation->type;
1ac7e2fd 1346 rcu_read_unlock();
864472e9
TM		 1347 opendata->o_arg.u.delegation_type = delegation_type;
1348 status = nfs4_open_recover(opendata, state);
c6d00e63 1349 nfs4_opendata_put(opendata);
1da177e4
LT		 1350 return status;
1351}
1352
539cd03a 1353static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1354{
1355 struct nfs_server *server = NFS_SERVER(state->inode);
1356 struct nfs4_exception exception = { };
1357 int err;
1358 do {
539cd03a 1359 err = _nfs4_do_open_reclaim(ctx, state);
49f9a0fa
TM		 1360 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1361 continue;
168667c4 1362 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1363 break;
1364 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1365 } while (exception.retry);
1366 return err;
1367}
1368
864472e9
TM		 1369static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1370{
1371 struct nfs_open_context *ctx;
1372 int ret;
1373
1374 ctx = nfs4_state_find_open_context(state);
1375 if (IS_ERR(ctx))
91876b13 1376 return -EAGAIN;
539cd03a 1377 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1378 put_nfs_open_context(ctx);
1379 return ret;
1380}
1381
db4f2e63 1382static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1383{
be76b5b6
TM		 1384 switch (err) {
1385 default:
1386 printk(KERN_ERR "NFS: %s: unhandled error "
1387 "%d.\n", __func__, err);
1388 case 0:
1389 case -ENOENT:
1390 case -ESTALE:
1391 break;
1392 case -NFS4ERR_BADSESSION:
1393 case -NFS4ERR_BADSLOT:
1394 case -NFS4ERR_BAD_HIGH_SLOT:
1395 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1396 case -NFS4ERR_DEADSESSION:
1397 set_bit(NFS_DELEGATED_STATE, &state->flags);
1398 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1399 return -EAGAIN;
1400 case -NFS4ERR_STALE_CLIENTID:
1401 case -NFS4ERR_STALE_STATEID:
1402 set_bit(NFS_DELEGATED_STATE, &state->flags);
1403 case -NFS4ERR_EXPIRED:
1404 /* Don't recall a delegation if it was lost */
1405 nfs4_schedule_lease_recovery(server->nfs_client);
1406 return -EAGAIN;
1407 case -NFS4ERR_DELEG_REVOKED:
1408 case -NFS4ERR_ADMIN_REVOKED:
1409 case -NFS4ERR_BAD_STATEID:
db4f2e63 1410 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1411 nfs_inode_find_state_and_recover(state->inode,
1412 stateid);
1413 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1414 return 0;
1415 case -NFS4ERR_DELAY:
1416 case -NFS4ERR_GRACE:
1417 set_bit(NFS_DELEGATED_STATE, &state->flags);
1418 ssleep(1);
1419 return -EAGAIN;
db4f2e63
TM		 1420 case -ENOMEM:
1421 case -NFS4ERR_DENIED:
1422 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1423 return 0;
be76b5b6 1424 }
1da177e4
LT		 1425 return err;
1426}
1427
db4f2e63
TM		 1428int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1429{
1430 struct nfs_server *server = NFS_SERVER(state->inode);
1431 struct nfs4_opendata *opendata;
1432 int err;
1433
1434 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1435 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1436 if (IS_ERR(opendata))
1437 return PTR_ERR(opendata);
1438 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1439 err = nfs4_open_recover(opendata, state);
1440 nfs4_opendata_put(opendata);
1441 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1442}
1443
cdd4e68b
TM		 1444static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1445{
1446 struct nfs4_opendata *data = calldata;
1447
1448 data->rpc_status = task->tk_status;
26e976a8 1449 if (data->rpc_status == 0) {
f597c537 1450 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1451 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1452 renew_lease(data->o_res.server, data->timestamp);
3e309914 1453 data->rpc_done = 1;
26e976a8 1454 }
cdd4e68b
TM		 1455}
1456
1457static void nfs4_open_confirm_release(void *calldata)
1458{
1459 struct nfs4_opendata *data = calldata;
1460 struct nfs4_state *state = NULL;
1461
1462 /* If this request hasn't been cancelled, do nothing */
1463 if (data->cancelled == 0)
1464 goto out_free;
1465 /* In case of error, no cleanup! */
3e309914 1466 if (!data->rpc_done)
cdd4e68b 1467 goto out_free;
cdd4e68b 1468 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1469 if (!IS_ERR(state))
643168c2 1470 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1471out_free:
c6d00e63 1472 nfs4_opendata_put(data);
cdd4e68b
TM		 1473}
1474
1475static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1476 .rpc_call_done = nfs4_open_confirm_done,
1477 .rpc_release = nfs4_open_confirm_release,
1478};
1479
1480/*
1481 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1482 */
1483static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1484{
1485 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1486 struct rpc_task *task;
5138fde0
TM		 1487 struct rpc_message msg = {
1488 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1489 .rpc_argp = &data->c_arg,
1490 .rpc_resp = &data->c_res,
1491 .rpc_cred = data->owner->so_cred,
1492 };
c970aa85
TM		 1493 struct rpc_task_setup task_setup_data = {
1494 .rpc_client = server->client,
5138fde0 1495 .rpc_message = &msg,
c970aa85
TM		 1496 .callback_ops = &nfs4_open_confirm_ops,
1497 .callback_data = data,
101070ca 1498 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1499 .flags = RPC_TASK_ASYNC,
1500 };
1da177e4
LT		 1501 int status;
1502
c6d00e63 1503 kref_get(&data->kref);
3e309914
TM		 1504 data->rpc_done = 0;
1505 data->rpc_status = 0;
5138fde0 1506 data->timestamp = jiffies;
c970aa85 1507 task = rpc_run_task(&task_setup_data);
7a1218a2 1508 if (IS_ERR(task))
cdd4e68b 1509 return PTR_ERR(task);
cdd4e68b
TM		 1510 status = nfs4_wait_for_completion_rpc_task(task);
1511 if (status != 0) {
1512 data->cancelled = 1;
1513 smp_wmb();
1514 } else
1515 status = data->rpc_status;
e6b3c4db 1516 rpc_put_task(task);
1da177e4
LT		 1517 return status;
1518}
1519
24ac23ab 1520static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1521{
24ac23ab
TM		 1522 struct nfs4_opendata *data = calldata;
1523 struct nfs4_state_owner *sp = data->owner;
5138fde0 1524
24ac23ab 1525 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1526 goto out_wait;
aac00a8d
TM		 1527 /*
1528 * Check if we still need to send an OPEN call, or if we can use
1529 * a delegation instead.
1530 */
1531 if (data->state != NULL) {
1532 struct nfs_delegation *delegation;
1533
dc0b027d 1534 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1535 goto out_no_action;
aac00a8d
TM		 1536 rcu_read_lock();
1537 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1538 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1539 can_open_delegated(delegation, data->o_arg.fmode))
1540 goto unlock_no_action;
aac00a8d
TM		 1541 rcu_read_unlock();
1542 }
95b72eb0 1543 /* Update client id. */
1f0e890d 1544 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1545 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1546 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
e23008ec 1547 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
6f220ed5
TM		 1548 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1549 }
26e976a8 1550 data->timestamp = jiffies;
035168ab 1551 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1552 &data->o_arg.seq_args,
2240a9e2
TM		 1553 &data->o_res.seq_res,
1554 task) != 0)
1555 nfs_release_seqid(data->o_arg.seqid);
6ee41268 1556 return;
652f89f6
TM		 1557unlock_no_action:
1558 rcu_read_unlock();
6ee41268
TM		 1559out_no_action:
1560 task->tk_action = NULL;
c8da19b9 1561out_wait:
b75ad4cd 1562 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1563}
1564
24ac23ab
TM		 1565static void nfs4_open_done(struct rpc_task *task, void *calldata)
1566{
1567 struct nfs4_opendata *data = calldata;
1da177e4 1568
24ac23ab 1569 data->rpc_status = task->tk_status;
d898528c 1570
14516c3a
TM		 1571 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1572 return;
d898528c 1573
24ac23ab 1574 if (task->tk_status == 0) {
807d66d8
TM		 1575 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1576 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1577 case S_IFREG:
1578 break;
1579 case S_IFLNK:
24ac23ab 1580 data->rpc_status = -ELOOP;
6f926b5b
TM		 1581 break;
1582 case S_IFDIR:
24ac23ab 1583 data->rpc_status = -EISDIR;
6f926b5b
TM		 1584 break;
1585 default:
24ac23ab 1586 data->rpc_status = -ENOTDIR;
807d66d8 1587 }
6f926b5b 1588 }
26e976a8 1589 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1590 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1591 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1592 }
3e309914 1593 data->rpc_done = 1;
24ac23ab 1594}
6f926b5b 1595
24ac23ab
TM		 1596static void nfs4_open_release(void *calldata)
1597{
1598 struct nfs4_opendata *data = calldata;
1599 struct nfs4_state *state = NULL;
1600
1601 /* If this request hasn't been cancelled, do nothing */
1602 if (data->cancelled == 0)
1603 goto out_free;
1604 /* In case of error, no cleanup! */
3e309914 1605 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1606 goto out_free;
1607 /* In case we need an open_confirm, no cleanup! */
1608 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1609 goto out_free;
24ac23ab 1610 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1611 if (!IS_ERR(state))
643168c2 1612 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1613out_free:
c6d00e63 1614 nfs4_opendata_put(data);
24ac23ab
TM		 1615}
1616
1617static const struct rpc_call_ops nfs4_open_ops = {
1618 .rpc_call_prepare = nfs4_open_prepare,
1619 .rpc_call_done = nfs4_open_done,
1620 .rpc_release = nfs4_open_release,
1621};
1622
b257957e 1623static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1624{
1625 struct inode *dir = data->dir->d_inode;
1626 struct nfs_server *server = NFS_SERVER(dir);
1627 struct nfs_openargs *o_arg = &data->o_arg;
1628 struct nfs_openres *o_res = &data->o_res;
1629 struct rpc_task *task;
5138fde0
TM		 1630 struct rpc_message msg = {
1631 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1632 .rpc_argp = o_arg,
1633 .rpc_resp = o_res,
1634 .rpc_cred = data->owner->so_cred,
1635 };
c970aa85
TM		 1636 struct rpc_task_setup task_setup_data = {
1637 .rpc_client = server->client,
5138fde0 1638 .rpc_message = &msg,
c970aa85
TM		 1639 .callback_ops = &nfs4_open_ops,
1640 .callback_data = data,
101070ca 1641 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1642 .flags = RPC_TASK_ASYNC,
1643 };
24ac23ab
TM		 1644 int status;
1645
9d12b216 1646 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1647 kref_get(&data->kref);
3e309914
TM		 1648 data->rpc_done = 0;
1649 data->rpc_status = 0;
2ced46c2 1650 data->cancelled = 0;
b257957e 1651 if (isrecover)
8fe72bac 1652 nfs4_set_sequence_privileged(&o_arg->seq_args);
c970aa85 1653 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1654 if (IS_ERR(task))
1655 return PTR_ERR(task);
1656 status = nfs4_wait_for_completion_rpc_task(task);
1657 if (status != 0) {
1658 data->cancelled = 1;
1659 smp_wmb();
1660 } else
1661 status = data->rpc_status;
1662 rpc_put_task(task);
1663
1664 return status;
1665}
1666
1667static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1668{
1669 struct inode *dir = data->dir->d_inode;
1670 struct nfs_openres *o_res = &data->o_res;
1671 int status;
1672
1673 status = nfs4_run_open_task(data, 1);
1674 if (status != 0 || !data->rpc_done)
1675 return status;
1676
6926afd1
TM		 1677 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1678
b257957e
AB		 1679 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1680 status = _nfs4_proc_open_confirm(data);
1681 if (status != 0)
1682 return status;
1683 }
1684
1685 return status;
1686}
1687
6168f62c
WAA		 1688static int nfs4_opendata_access(struct rpc_cred *cred,
1689 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1690 struct nfs4_state *state, fmode_t fmode,
1691 int openflags)
6168f62c
WAA		 1692{
1693 struct nfs_access_entry cache;
1694 u32 mask;
1695
1696 /* access call failed or for some reason the server doesn't
1697 * support any access modes -- defer access call until later */
1698 if (opendata->o_res.access_supported == 0)
1699 return 0;
1700
1701 mask = 0;
bbd3a8ee 1702 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1703 * write mode bits, but POSIX allows the creating process to write.
1704 * use openflags to check for exec, because fmode won't
1705 * always have FMODE_EXEC set when file open for exec. */
1706 if (openflags & __FMODE_EXEC) {
1707 /* ONLY check for exec rights */
1708 mask = MAY_EXEC;
1709 } else if (fmode & FMODE_READ)
1710 mask = MAY_READ;
6168f62c
WAA		 1711
1712 cache.cred = cred;
1713 cache.jiffies = jiffies;
1714 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1715 nfs_access_add_cache(state->inode, &cache);
1716
bbd3a8ee 1717 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1718 return 0;
1719
1720 /* even though OPEN succeeded, access is denied. Close the file */
1721 nfs4_close_state(state, fmode);
998f40b5 1722 return -EACCES;
6168f62c
WAA		 1723}
1724
b257957e
AB		 1725/*
1726 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1727 */
1728static int _nfs4_proc_open(struct nfs4_opendata *data)
1729{
1730 struct inode *dir = data->dir->d_inode;
1731 struct nfs_server *server = NFS_SERVER(dir);
1732 struct nfs_openargs *o_arg = &data->o_arg;
1733 struct nfs_openres *o_res = &data->o_res;
1734 int status;
1735
1736 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1737 if (!data->rpc_done)
1738 return status;
1739 if (status != 0) {
1740 if (status == -NFS4ERR_BADNAME &&
1741 !(o_arg->open_flags & O_CREAT))
1742 return -ENOENT;
24ac23ab 1743 return status;
08ef7bd3 1744 }
24ac23ab 1745
6926afd1
TM		 1746 nfs_fattr_map_and_free_names(server, &data->f_attr);
1747
90ff0c54 1748 if (o_arg->open_flags & O_CREAT)
56ae19f3 1749 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1750 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1751 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1752 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1753 status = _nfs4_proc_open_confirm(data);
1da177e4 1754 if (status != 0)
24ac23ab 1755 return status;
1da177e4
LT		 1756 }
1757 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1758 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1759 return 0;
1da177e4
LT		 1760}
1761
d83217c1
AA		 1762static int nfs4_recover_expired_lease(struct nfs_server *server)
1763{
1764 return nfs4_client_recover_expired_lease(server->nfs_client);
1765}
1766
1da177e4
LT		 1767/*
1768 * OPEN_EXPIRED:
1769 * reclaim state on the server after a network partition.
1770 * Assumes caller holds the appropriate lock
1771 */
539cd03a 1772static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1773{
e56e0b78 1774 struct nfs4_opendata *opendata;
864472e9 1775 int ret;
1da177e4 1776
4a1c0893 1777 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1778 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1779 if (IS_ERR(opendata))
1780 return PTR_ERR(opendata);
864472e9 1781 ret = nfs4_open_recover(opendata, state);
35d05778 1782 if (ret == -ESTALE)
3d4ff43d 1783 d_drop(ctx->dentry);
c6d00e63 1784 nfs4_opendata_put(opendata);
864472e9 1785 return ret;
1da177e4
LT		 1786}
1787
a9ed2e25 1788static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1789{
539cd03a 1790 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1791 struct nfs4_exception exception = { };
1792 int err;
1793
1794 do {
539cd03a 1795 err = _nfs4_open_expired(ctx, state);
49f9a0fa
TM		 1796 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1797 continue;
a9ed2e25
TM		 1798 switch (err) {
1799 default:
1800 goto out;
1801 case -NFS4ERR_GRACE:
1802 case -NFS4ERR_DELAY:
1803 nfs4_handle_exception(server, err, &exception);
1804 err = 0;
1805 }
202b50dc 1806 } while (exception.retry);
a9ed2e25 1807out:
202b50dc
TM		 1808 return err;
1809}
1810
1da177e4
LT		 1811static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1812{
1da177e4 1813 struct nfs_open_context *ctx;
864472e9 1814 int ret;
1da177e4 1815
864472e9
TM		 1816 ctx = nfs4_state_find_open_context(state);
1817 if (IS_ERR(ctx))
91876b13 1818 return -EAGAIN;
539cd03a 1819 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1820 put_nfs_open_context(ctx);
1821 return ret;
1da177e4
LT		 1822}
1823
f062eb6c 1824#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1825static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1826{
f062eb6c 1827 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1828 nfs4_stateid *stateid = &state->stateid;
1829 int status;
1830
1831 /* If a state reset has been done, test_stateid is unneeded */
1832 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1833 return;
1834
1835 status = nfs41_test_stateid(server, stateid);
1836 if (status != NFS_OK) {
1837 /* Free the stateid unless the server explicitly
1838 * informs us the stateid is unrecognized. */
1839 if (status != -NFS4ERR_BAD_STATEID)
1840 nfs41_free_stateid(server, stateid);
6938867e 1841 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1842
6938867e
BS		 1843 write_seqlock(&state->seqlock);
1844 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1845 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1846 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1847 }
1848}
1849
1850/**
1851 * nfs41_check_open_stateid - possibly free an open stateid
1852 *
1853 * @state: NFSv4 state for an inode
1854 *
1855 * Returns NFS_OK if recovery for this stateid is now finished.
1856 * Otherwise a negative NFS4ERR value is returned.
1857 */
1858static int nfs41_check_open_stateid(struct nfs4_state *state)
1859{
1860 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1861 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1862 int status;
1863
1864 /* If a state reset has been done, test_stateid is unneeded */
1865 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1866 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1867 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1868 return -NFS4ERR_BAD_STATEID;
1869
1870 status = nfs41_test_stateid(server, stateid);
1871 if (status != NFS_OK) {
1872 /* Free the stateid unless the server explicitly
1873 * informs us the stateid is unrecognized. */
1874 if (status != -NFS4ERR_BAD_STATEID)
1875 nfs41_free_stateid(server, stateid);
1876
1877 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1878 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1879 clear_bit(NFS_O_RDWR_STATE, &state->flags);
b01dd1d8
BS		 1880 }
1881 return status;
1882}
1883
1884static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1885{
eb64cf96 1886 int status;
b01dd1d8 1887
3e60ffdd
CL		 1888 nfs41_clear_delegation_stateid(state);
1889 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1890 if (status != NFS_OK)
1891 status = nfs4_open_expired(sp, state);
1892 return status;
f062eb6c
BS		 1893}
1894#endif
1895
aa53ed54
JL		 1896/*
1897 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1898 * fields corresponding to attributes that were used to store the verifier.
1899 * Make sure we clobber those fields in the later setattr call
1900 */
1901static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1902{
1903 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1904 !(sattr->ia_valid & ATTR_ATIME_SET))
1905 sattr->ia_valid |= ATTR_ATIME;
1906
1907 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1908 !(sattr->ia_valid & ATTR_MTIME_SET))
1909 sattr->ia_valid |= ATTR_MTIME;
1910}
1911
c21443c2
TM		 1912static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1913 fmode_t fmode,
1914 int flags,
1915 struct nfs4_state **res)
1916{
1917 struct nfs4_state_owner *sp = opendata->owner;
1918 struct nfs_server *server = sp->so_server;
1919 struct nfs4_state *state;
1920 unsigned int seq;
1921 int ret;
1922
1923 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1924
1925 ret = _nfs4_proc_open(opendata);
1926 if (ret != 0)
1927 goto out;
1928
1929 state = nfs4_opendata_to_nfs4_state(opendata);
1930 ret = PTR_ERR(state);
1931 if (IS_ERR(state))
1932 goto out;
1933 if (server->caps & NFS_CAP_POSIX_LOCK)
1934 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1935
1936 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1937 if (ret != 0)
1938 goto out;
1939
91876b13 1940 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
c21443c2 1941 nfs4_schedule_stateid_recovery(server, state);
c21443c2
TM		 1942 *res = state;
1943out:
1944 return ret;
1945}
1946
1da177e4 1947/*
24ac23ab 1948 * Returns a referenced nfs4_state
1da177e4 1949 */
82be417a
AA		 1950static int _nfs4_do_open(struct inode *dir,
1951 struct dentry *dentry,
1952 fmode_t fmode,
1953 int flags,
1954 struct iattr *sattr,
1955 struct rpc_cred *cred,
1956 struct nfs4_state **res,
1957 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1958{
1959 struct nfs4_state_owner *sp;
1960 struct nfs4_state *state = NULL;
1961 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1962 struct nfs4_opendata *opendata;
49f9a0fa 1963 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
aac00a8d 1964 int status;
1da177e4
LT		 1965
1966 /* Protect against reboot recovery conflicts */
1da177e4 1967 status = -ENOMEM;
d1e284d5
TM		 1968 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1969 if (sp == NULL) {
1da177e4
LT		 1970 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1971 goto out_err;
1972 }
58d9714a
TM		 1973 status = nfs4_recover_expired_lease(server);
1974 if (status != 0)
b4454fe1 1975 goto err_put_state_owner;
82a2c1b7
AV		 1976 if (dentry->d_inode != NULL)
1977 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1978 status = -ENOMEM;
49f9a0fa
TM		 1979 if (dentry->d_inode)
1980 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 1981 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
49f9a0fa 1982 claim, GFP_KERNEL);
e56e0b78 1983 if (opendata == NULL)
95d35cb4 1984 goto err_put_state_owner;
1da177e4 1985
82be417a
AA		 1986 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1987 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1988 if (!opendata->f_attr.mdsthreshold)
1989 goto err_opendata_put;
1549210f 1990 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 1991 }
82a2c1b7
AV		 1992 if (dentry->d_inode != NULL)
1993 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1994
c21443c2 1995 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
6168f62c
WAA		 1996 if (status != 0)
1997 goto err_opendata_put;
1998
0ab64e0e
TM		 1999 if (opendata->o_arg.open_flags & O_EXCL) {
2000 nfs4_exclusive_attrset(opendata, sattr);
2001
2002 nfs_fattr_init(opendata->o_res.f_attr);
2003 status = nfs4_do_setattr(state->inode, cred,
2004 opendata->o_res.f_attr, sattr,
2005 state);
2006 if (status == 0)
2007 nfs_setattr_update_inode(state->inode, sattr);
2008 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2009 }
82be417a
AA		 2010
2011 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2012 *ctx_th = opendata->f_attr.mdsthreshold;
2013 else
2014 kfree(opendata->f_attr.mdsthreshold);
2015 opendata->f_attr.mdsthreshold = NULL;
2016
c6d00e63 2017 nfs4_opendata_put(opendata);
1da177e4 2018 nfs4_put_state_owner(sp);
1da177e4
LT		 2019 *res = state;
2020 return 0;
c6d00e63 2021err_opendata_put:
82be417a 2022 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2023 nfs4_opendata_put(opendata);
e56e0b78
TM		 2024err_put_state_owner:
2025 nfs4_put_state_owner(sp);
1da177e4 2026out_err:
1da177e4
LT		 2027 *res = NULL;
2028 return status;
2029}
2030
2031
82be417a
AA		 2032static struct nfs4_state *nfs4_do_open(struct inode *dir,
2033 struct dentry *dentry,
2034 fmode_t fmode,
2035 int flags,
2036 struct iattr *sattr,
2037 struct rpc_cred *cred,
2038 struct nfs4_threshold **ctx_th)
1da177e4 2039{
49f9a0fa 2040 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2041 struct nfs4_exception exception = { };
2042 struct nfs4_state *res;
2043 int status;
2044
6168f62c 2045 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 2046 do {
82be417a
AA		 2047 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
2048 &res, ctx_th);
1da177e4
LT		 2049 if (status == 0)
2050 break;
2051 /* NOTE: BAD_SEQID means the server and client disagree about the
2052 * book-keeping w.r.t. state-changing operations
2053 * (OPEN/CLOSE/LOCK/LOCKU...)
2054 * It is actually a sign of a bug on the client or on the server.
2055 *
2056 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2057 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2058 * have unhashed the old state_owner for us, and that we can
2059 * therefore safely retry using a new one. We should still warn
2060 * the user though...
2061 */
2062 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2063 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2064 " returned a bad sequence-id error!\n",
2065 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2066 exception.retry = 1;
2067 continue;
2068 }
550f5747
TM		 2069 /*
2070 * BAD_STATEID on OPEN means that the server cancelled our
2071 * state before it received the OPEN_CONFIRM.
2072 * Recover by retrying the request as per the discussion
2073 * on Page 181 of RFC3530.
2074 */
2075 if (status == -NFS4ERR_BAD_STATEID) {
2076 exception.retry = 1;
2077 continue;
2078 }
aac00a8d
TM		 2079 if (status == -EAGAIN) {
2080 /* We must have found a delegation */
2081 exception.retry = 1;
2082 continue;
2083 }
49f9a0fa
TM		 2084 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2085 continue;
2086 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2087 status, &exception));
2088 } while (exception.retry);
2089 return res;
2090}
2091
659bfcd6
TM		 2092static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2093 struct nfs_fattr *fattr, struct iattr *sattr,
2094 struct nfs4_state *state)
1da177e4 2095{
3e4f6290 2096 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2097 struct nfs_setattrargs arg = {
3e4f6290 2098 .fh = NFS_FH(inode),
1da177e4
LT		 2099 .iap = sattr,
2100 .server = server,
2101 .bitmask = server->attr_bitmask,
2102 };
2103 struct nfs_setattrres res = {
2104 .fattr = fattr,
2105 .server = server,
2106 };
2107 struct rpc_message msg = {
659bfcd6
TM		 2108 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2109 .rpc_argp = &arg,
2110 .rpc_resp = &res,
2111 .rpc_cred = cred,
1da177e4 2112 };
26e976a8 2113 unsigned long timestamp = jiffies;
65e4308d 2114 int status;
1da177e4 2115
0e574af1 2116 nfs_fattr_init(fattr);
1da177e4 2117
5d422301 2118 if (state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2119 struct nfs_lockowner lockowner = {
2120 .l_owner = current->files,
2121 .l_pid = current->tgid,
2122 };
4fc8796d 2123 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2124 &lockowner);
4fc8796d
TM		 2125 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2126 FMODE_WRITE)) {
3e4f6290 2127 /* Use that stateid */
08e9eac4 2128 } else
f597c537 2129 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2130
7c513058 2131 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2132 if (status == 0 && state != NULL)
2133 renew_lease(server, timestamp);
65e4308d 2134 return status;
1da177e4
LT		 2135}
2136
659bfcd6
TM		 2137static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2138 struct nfs_fattr *fattr, struct iattr *sattr,
2139 struct nfs4_state *state)
1da177e4 2140{
3e4f6290 2141 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2142 struct nfs4_exception exception = {
2143 .state = state,
3114ea7a 2144 .inode = inode,
a1d0b5ee 2145 };
1da177e4
LT		 2146 int err;
2147 do {
451146be
TM		 2148 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2149 switch (err) {
2150 case -NFS4ERR_OPENMODE:
2151 if (state && !(state->state & FMODE_WRITE)) {
2152 err = -EBADF;
2153 if (sattr->ia_valid & ATTR_OPEN)
2154 err = -EACCES;
2155 goto out;
2156 }
2157 }
2158 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2159 } while (exception.retry);
451146be 2160out:
1da177e4
LT		 2161 return err;
2162}
2163
2164struct nfs4_closedata {
2165 struct inode *inode;
2166 struct nfs4_state *state;
2167 struct nfs_closeargs arg;
2168 struct nfs_closeres res;
516a6af6 2169 struct nfs_fattr fattr;
26e976a8 2170 unsigned long timestamp;
f7e8917a
FI		 2171 bool roc;
2172 u32 roc_barrier;
1da177e4
LT		 2173};
2174
963d8fe5 2175static void nfs4_free_closedata(void *data)
9512135d 2176{
963d8fe5
TM		 2177 struct nfs4_closedata *calldata = data;
2178 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2179 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2180
f7e8917a
FI		 2181 if (calldata->roc)
2182 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2183 nfs4_put_open_state(calldata->state);
2184 nfs_free_seqid(calldata->arg.seqid);
9512135d 2185 nfs4_put_state_owner(sp);
322b2b90 2186 nfs_sb_deactive(sb);
9512135d
TM		 2187 kfree(calldata);
2188}
2189
88069f77
TM		 2190static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2191 fmode_t fmode)
2192{
2193 spin_lock(&state->owner->so_lock);
2194 if (!(fmode & FMODE_READ))
2195 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2196 if (!(fmode & FMODE_WRITE))
2197 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2198 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2199 spin_unlock(&state->owner->so_lock);
2200}
2201
963d8fe5 2202static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2203{
963d8fe5 2204 struct nfs4_closedata *calldata = data;
1da177e4 2205 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2206 struct nfs_server *server = NFS_SERVER(calldata->inode);
2207
a3ca5651 2208 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2209 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2210 return;
1da177e4
LT		 2211 /* hmm. we are done with the inode, and in the process of freeing
2212 * the state_owner. we keep this around to process errors
2213 */
1da177e4
LT		 2214 switch (task->tk_status) {
2215 case 0:
f7e8917a
FI		 2216 if (calldata->roc)
2217 pnfs_roc_set_barrier(state->inode,
2218 calldata->roc_barrier);
45328c35 2219 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2220 renew_lease(server, calldata->timestamp);
88069f77
TM		 2221 nfs4_close_clear_stateid_flags(state,
2222 calldata->arg.fmode);
1da177e4
LT		 2223 break;
2224 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2225 case -NFS4ERR_OLD_STATEID:
2226 case -NFS4ERR_BAD_STATEID:
1da177e4 2227 case -NFS4ERR_EXPIRED:
dc0b027d 2228 if (calldata->arg.fmode == 0)
9e33bed5 2229 break;
1da177e4 2230 default:
72211dbe
TM		 2231 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2232 rpc_restart_call_prepare(task);
1da177e4 2233 }
72211dbe 2234 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2235 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2236 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2237}
2238
4ce70ada 2239static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2240{
4ce70ada 2241 struct nfs4_closedata *calldata = data;
9512135d 2242 struct nfs4_state *state = calldata->state;
7fdab069 2243 struct inode *inode = calldata->inode;
88069f77 2244 int call_close = 0;
9512135d 2245
a3ca5651 2246 dprintk("%s: begin!\n", __func__);
963d8fe5 2247 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2248 goto out_wait;
003707c7 2249
88069f77
TM		 2250 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2251 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2252 spin_lock(&state->owner->so_lock);
003707c7 2253 /* Calculate the change in open mode */
e7616923 2254 if (state->n_rdwr == 0) {
003707c7 2255 if (state->n_rdonly == 0) {
88069f77
TM		 2256 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2257 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2258 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2259 }
2260 if (state->n_wronly == 0) {
88069f77
TM		 2261 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2262 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2263 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2264 }
e7616923 2265 }
5d422301
TM		 2266 if (!nfs4_valid_open_stateid(state))
2267 call_close = 0;
4cecb76f 2268 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2269
2270 if (!call_close) {
963d8fe5 2271 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2272 goto out_no_action;
9512135d 2273 }
88069f77 2274
f7e8917a 2275 if (calldata->arg.fmode == 0) {
88069f77 2276 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2277 if (calldata->roc &&
7fdab069 2278 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
c8da19b9 2279 goto out_wait;
f7e8917a 2280 }
88069f77 2281
516a6af6 2282 nfs_fattr_init(calldata->res.fattr);
26e976a8 2283 calldata->timestamp = jiffies;
7fdab069 2284 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2285 &calldata->arg.seq_args,
2286 &calldata->res.seq_res,
2240a9e2
TM		 2287 task) != 0)
2288 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2289 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2290 return;
2291out_no_action:
2292 task->tk_action = NULL;
2293out_wait:
2294 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2295}
2296
963d8fe5 2297static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2298 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2299 .rpc_call_done = nfs4_close_done,
2300 .rpc_release = nfs4_free_closedata,
2301};
2302
1da177e4
LT		 2303/*
2304 * It is possible for data to be read/written from a mem-mapped file
2305 * after the sys_close call (which hits the vfs layer as a flush).
2306 * This means that we can't safely call nfsv4 close on a file until
2307 * the inode is cleared. This in turn means that we are not good
2308 * NFSv4 citizens - we do not indicate to the server to update the file's
2309 * share state even when we are done with one of the three share
2310 * stateid's in the inode.
2311 *
2312 * NOTE: Caller must be holding the sp->so_owner semaphore!
2313 */
1f7977c1 2314int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2315{
4a35bd41 2316 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2317 struct nfs4_closedata *calldata;
b39e625b
TM		 2318 struct nfs4_state_owner *sp = state->owner;
2319 struct rpc_task *task;
5138fde0
TM		 2320 struct rpc_message msg = {
2321 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2322 .rpc_cred = state->owner->so_cred,
2323 };
c970aa85
TM		 2324 struct rpc_task_setup task_setup_data = {
2325 .rpc_client = server->client,
5138fde0 2326 .rpc_message = &msg,
c970aa85 2327 .callback_ops = &nfs4_close_ops,
101070ca 2328 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2329 .flags = RPC_TASK_ASYNC,
2330 };
9512135d 2331 int status = -ENOMEM;
1da177e4 2332
8535b2be 2333 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2334 if (calldata == NULL)
9512135d 2335 goto out;
9d12b216 2336 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2337 calldata->inode = state->inode;
1da177e4 2338 calldata->state = state;
4a35bd41 2339 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2340 calldata->arg.stateid = &state->open_stateid;
1da177e4 2341 /* Serialization for the sequence id */
8535b2be 2342 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2343 if (calldata->arg.seqid == NULL)
2344 goto out_free_calldata;
dc0b027d 2345 calldata->arg.fmode = 0;
a65318bf 2346 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2347 calldata->res.fattr = &calldata->fattr;
c1d51931 2348 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2349 calldata->res.server = server;
1f7977c1 2350 calldata->roc = pnfs_roc(state->inode);
643168c2 2351 nfs_sb_active(calldata->inode->i_sb);
9512135d 2352
1174dd1f
TM		 2353 msg.rpc_argp = &calldata->arg;
2354 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2355 task_setup_data.callback_data = calldata;
2356 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2357 if (IS_ERR(task))
2358 return PTR_ERR(task);
a49c3c77
TM		 2359 status = 0;
2360 if (wait)
2361 status = rpc_wait_for_completion_task(task);
b39e625b 2362 rpc_put_task(task);
a49c3c77 2363 return status;
9512135d
TM		 2364out_free_calldata:
2365 kfree(calldata);
2366out:
b39e625b
TM		 2367 nfs4_put_open_state(state);
2368 nfs4_put_state_owner(sp);
9512135d 2369 return status;
1da177e4
LT		 2370}
2371
2b484297 2372static struct inode *
cd9a1c0e 2373nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2374{
1da177e4 2375 struct nfs4_state *state;
1da177e4 2376
565277f6 2377 /* Protect against concurrent sillydeletes */
82be417a
AA		 2378 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2379 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2380 if (IS_ERR(state))
2381 return ERR_CAST(state);
cd9a1c0e 2382 ctx->state = state;
f46e0bd3 2383 return igrab(state->inode);
1da177e4
LT		 2384}
2385
1185a552 2386static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2387{
2388 if (ctx->state == NULL)
2389 return;
2390 if (is_sync)
643168c2 2391 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2392 else
643168c2 2393 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2394}
1da177e4
LT		 2395
2396static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2397{
43652ad5
BH		 2398 struct nfs4_server_caps_arg args = {
2399 .fhandle = fhandle,
2400 };
1da177e4
LT		 2401 struct nfs4_server_caps_res res = {};
2402 struct rpc_message msg = {
2403 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2404 .rpc_argp = &args,
1da177e4
LT		 2405 .rpc_resp = &res,
2406 };
2407 int status;
2408
7c513058 2409 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2410 if (status == 0) {
2411 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2412 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2413 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2414 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2415 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2416 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2417 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2418 server->caps |= NFS_CAP_ACLS;
2419 if (res.has_links != 0)
2420 server->caps |= NFS_CAP_HARDLINKS;
2421 if (res.has_symlinks != 0)
2422 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2423 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2424 server->caps |= NFS_CAP_FILEID;
2425 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2426 server->caps |= NFS_CAP_MODE;
2427 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2428 server->caps |= NFS_CAP_NLINK;
2429 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2430 server->caps |= NFS_CAP_OWNER;
2431 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2432 server->caps |= NFS_CAP_OWNER_GROUP;
2433 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2434 server->caps |= NFS_CAP_ATIME;
2435 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2436 server->caps |= NFS_CAP_CTIME;
2437 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2438 server->caps |= NFS_CAP_MTIME;
2439
a65318bf
TM		 2440 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2441 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2442 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2443 server->acl_bitmask = res.acl_bitmask;
264e6351 2444 server->fh_expire_type = res.fh_expire_type;
1da177e4 2445 }
cccef3b9 2446
1da177e4
LT		 2447 return status;
2448}
2449
55a97593 2450int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2451{
2452 struct nfs4_exception exception = { };
2453 int err;
2454 do {
2455 err = nfs4_handle_exception(server,
2456 _nfs4_server_capabilities(server, fhandle),
2457 &exception);
2458 } while (exception.retry);
2459 return err;
2460}
2461
2462static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2463 struct nfs_fsinfo *info)
2464{
1da177e4
LT		 2465 struct nfs4_lookup_root_arg args = {
2466 .bitmask = nfs4_fattr_bitmap,
2467 };
2468 struct nfs4_lookup_res res = {
2469 .server = server,
0e574af1 2470 .fattr = info->fattr,
1da177e4
LT		 2471 .fh = fhandle,
2472 };
2473 struct rpc_message msg = {
2474 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2475 .rpc_argp = &args,
2476 .rpc_resp = &res,
2477 };
008f55d0 2478
0e574af1 2479 nfs_fattr_init(info->fattr);
7c513058 2480 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2481}
2482
2483static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2484 struct nfs_fsinfo *info)
2485{
2486 struct nfs4_exception exception = { };
2487 int err;
2488 do {
fb8a5ba8
BS		 2489 err = _nfs4_lookup_root(server, fhandle, info);
2490 switch (err) {
2491 case 0:
2492 case -NFS4ERR_WRONGSEC:
05e9cfb4 2493 goto out;
fb8a5ba8
BS		 2494 default:
2495 err = nfs4_handle_exception(server, err, &exception);
2496 }
1da177e4 2497 } while (exception.retry);
05e9cfb4 2498out:
1da177e4
LT		 2499 return err;
2500}
2501
8f70e95f
BS		 2502static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2503 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2504{
2505 struct rpc_auth *auth;
2506 int ret;
2507
2508 auth = rpcauth_create(flavor, server->client);
e8d920c5 2509 if (IS_ERR(auth)) {
8f70e95f
BS		 2510 ret = -EIO;
2511 goto out;
2512 }
2513 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2514out:
2515 return ret;
2516}
2517
801a16dc 2518static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2519 struct nfs_fsinfo *info)
1da177e4 2520{
8f70e95f 2521 int i, len, status = 0;
0fabee24 2522 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2523
6a1a1e34 2524 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
4ea8fed5
TM		 2525 if (len < 0)
2526 return len;
8f70e95f
BS		 2527
2528 for (i = 0; i < len; i++) {
6a1a1e34
CL		 2529 /* AUTH_UNIX is the default flavor if none was specified,
2530 * thus has already been tried. */
2531 if (flav_array[i] == RPC_AUTH_UNIX)
2532 continue;
2533
8f70e95f 2534 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2535 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2536 continue;
2537 break;
8f70e95f 2538 }
fb8a5ba8
BS		 2539 /*
2540 * -EACCESS could mean that the user doesn't have correct permissions
2541 * to access the mount. It could also mean that we tried to mount
2542 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2543 * existing mount programs don't handle -EACCES very well so it should
2544 * be mapped to -EPERM instead.
2545 */
2546 if (status == -EACCES)
2547 status = -EPERM;
801a16dc
BS		 2548 return status;
2549}
2550
2551/*
2552 * get the file handle for the "/" directory on the server
2553 */
3028eb2b
BS		 2554int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2555 struct nfs_fsinfo *info)
801a16dc 2556{
fca78d6d 2557 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2558 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2559 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2560 /*
2561 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2562 * by nfs4_map_errors() as this function exits.
2563 */
fca78d6d 2564 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2565 if (status == 0)
2566 status = nfs4_server_capabilities(server, fhandle);
2567 if (status == 0)
2568 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2569 return nfs4_map_errors(status);
1da177e4
LT		 2570}
2571
bae36241
BS		 2572static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2573 struct nfs_fsinfo *info)
2574{
2575 int error;
2576 struct nfs_fattr *fattr = info->fattr;
2577
2578 error = nfs4_server_capabilities(server, mntfh);
2579 if (error < 0) {
2580 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2581 return error;
2582 }
2583
2584 error = nfs4_proc_getattr(server, mntfh, fattr);
2585 if (error < 0) {
2586 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2587 return error;
2588 }
2589
2590 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2591 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2592 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2593
2594 return error;
2595}
2596
6b97fd3d
MN		 2597/*
2598 * Get locations and (maybe) other attributes of a referral.
2599 * Note that we'll actually follow the referral later when
2600 * we detect fsid mismatch in inode revalidation
2601 */
f05d147f
BS		 2602static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2603 const struct qstr *name, struct nfs_fattr *fattr,
2604 struct nfs_fh *fhandle)
6b97fd3d
MN		 2605{
2606 int status = -ENOMEM;
2607 struct page *page = NULL;
2608 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2609
2610 page = alloc_page(GFP_KERNEL);
2611 if (page == NULL)
2612 goto out;
2613 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2614 if (locations == NULL)
2615 goto out;
2616
f05d147f 2617 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2618 if (status != 0)
2619 goto out;
2620 /* Make sure server returned a different fsid for the referral */
2621 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2622 dprintk("%s: server did not return a different fsid for"
2623 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2624 status = -EIO;
2625 goto out;
2626 }
533eb461
AA		 2627 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2628 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2629
533eb461 2630 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2631 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2632 memset(fhandle, 0, sizeof(struct nfs_fh));
2633out:
2634 if (page)
2635 __free_page(page);
5d7ca35a 2636 kfree(locations);
6b97fd3d
MN		 2637 return status;
2638}
2639
1da177e4
LT		 2640static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2641{
2642 struct nfs4_getattr_arg args = {
2643 .fh = fhandle,
2644 .bitmask = server->attr_bitmask,
2645 };
2646 struct nfs4_getattr_res res = {
2647 .fattr = fattr,
2648 .server = server,
2649 };
2650 struct rpc_message msg = {
2651 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2652 .rpc_argp = &args,
2653 .rpc_resp = &res,
2654 };
2655
0e574af1 2656 nfs_fattr_init(fattr);
7c513058 2657 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2658}
2659
2660static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2661{
2662 struct nfs4_exception exception = { };
2663 int err;
2664 do {
2665 err = nfs4_handle_exception(server,
2666 _nfs4_proc_getattr(server, fhandle, fattr),
2667 &exception);
2668 } while (exception.retry);
2669 return err;
2670}
2671
2672/*
2673 * The file is not closed if it is opened due to the a request to change
2674 * the size of the file. The open call will not be needed once the
2675 * VFS layer lookup-intents are implemented.
2676 *
2677 * Close is called when the inode is destroyed.
2678 * If we haven't opened the file for O_WRONLY, we
2679 * need to in the size_change case to obtain a stateid.
2680 *
2681 * Got race?
2682 * Because OPEN is always done by name in nfsv4, it is
2683 * possible that we opened a different file by the same
2684 * name. We can recognize this race condition, but we
2685 * can't do anything about it besides returning an error.
2686 *
2687 * This will be fixed with VFS changes (lookup-intent).
2688 */
2689static int
2690nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2691 struct iattr *sattr)
2692{
08e9eac4 2693 struct inode *inode = dentry->d_inode;
659bfcd6 2694 struct rpc_cred *cred = NULL;
d530838b 2695 struct nfs4_state *state = NULL;
1da177e4
LT		 2696 int status;
2697
8a1636c4 2698 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2699 pnfs_commit_and_return_layout(inode);
8a1636c4 2700
0e574af1 2701 nfs_fattr_init(fattr);
1da177e4 2702
2669940d
AA		 2703 /* Deal with open(O_TRUNC) */
2704 if (sattr->ia_valid & ATTR_OPEN)
2705 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2706
2707 /* Optimization: if the end result is no change, don't RPC */
2708 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2709 return 0;
2710
d530838b 2711 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2712 if (sattr->ia_valid & ATTR_FILE) {
2713 struct nfs_open_context *ctx;
2714
2715 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2716 if (ctx) {
2717 cred = ctx->cred;
2718 state = ctx->state;
2719 }
659bfcd6 2720 }
08e9eac4 2721
659bfcd6 2722 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2723 if (status == 0)
2724 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2725 return status;
2726}
2727
0c2e53f1
TM		 2728static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2729 const struct qstr *name, struct nfs_fh *fhandle,
2730 struct nfs_fattr *fattr)
2b3de441 2731{
0c2e53f1 2732 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2733 int status;
2734 struct nfs4_lookup_arg args = {
2735 .bitmask = server->attr_bitmask,
0c2e53f1 2736 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2737 .name = name,
2738 };
2739 struct nfs4_lookup_res res = {
2740 .server = server,
2741 .fattr = fattr,
2742 .fh = fhandle,
2743 };
2744 struct rpc_message msg = {
2745 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2746 .rpc_argp = &args,
2747 .rpc_resp = &res,
2748 };
2749
2750 nfs_fattr_init(fattr);
2751
1da177e4 2752 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2753 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2754 dprintk("NFS reply lookup: %d\n", status);
2755 return status;
2756}
2757
72de53ec 2758static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2759{
7ebb9315 2760 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2761 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2762 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2763 fattr->nlink = 2;
2764}
2765
72de53ec
BS		 2766static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2767 struct qstr *name, struct nfs_fh *fhandle,
2768 struct nfs_fattr *fattr)
1da177e4
LT		 2769{
2770 struct nfs4_exception exception = { };
72de53ec 2771 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2772 int err;
2773 do {
72de53ec
BS		 2774 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2775 switch (err) {
08ef7bd3 2776 case -NFS4ERR_BADNAME:
72de53ec
BS		 2777 err = -ENOENT;
2778 goto out;
0c2e53f1 2779 case -NFS4ERR_MOVED:
f05d147f 2780 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2781 goto out;
0c2e53f1 2782 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2783 err = -EPERM;
2784 if (client != *clnt)
2785 goto out;
2786
2787 client = nfs4_create_sec_client(client, dir, name);
2788 if (IS_ERR(client))
2789 return PTR_ERR(client);
2790
2791 exception.retry = 1;
2792 break;
2793 default:
2794 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2795 }
1da177e4 2796 } while (exception.retry);
72de53ec
BS		 2797
2798out:
2799 if (err == 0)
2800 *clnt = client;
2801 else if (client != *clnt)
2802 rpc_shutdown_client(client);
2803
1da177e4
LT		 2804 return err;
2805}
2806
80a16b21 2807static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2808 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2809{
2810 int status;
2811 struct rpc_clnt *client = NFS_CLIENT(dir);
2812
2813 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2814 if (client != NFS_CLIENT(dir)) {
2815 rpc_shutdown_client(client);
2816 nfs_fixup_secinfo_attributes(fattr);
2817 }
2818 return status;
2819}
2820
f05d147f
BS		 2821struct rpc_clnt *
2822nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2823 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2824{
2825 int status;
2826 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2827
2828 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2829 if (status < 0) {
2830 rpc_shutdown_client(client);
2831 return ERR_PTR(status);
2832 }
2833 return client;
2834}
2835
1da177e4
LT		 2836static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2837{
76b32999 2838 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2839 struct nfs4_accessargs args = {
2840 .fh = NFS_FH(inode),
a4980e78 2841 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2842 };
2843 struct nfs4_accessres res = {
2844 .server = server,
1da177e4 2845 };
1da177e4
LT		 2846 struct rpc_message msg = {
2847 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2848 .rpc_argp = &args,
2849 .rpc_resp = &res,
2850 .rpc_cred = entry->cred,
2851 };
2852 int mode = entry->mask;
2853 int status;
2854
2855 /*
2856 * Determine which access bits we want to ask for...
2857 */
2858 if (mode & MAY_READ)
2859 args.access |= NFS4_ACCESS_READ;
2860 if (S_ISDIR(inode->i_mode)) {
2861 if (mode & MAY_WRITE)
2862 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2863 if (mode & MAY_EXEC)
2864 args.access |= NFS4_ACCESS_LOOKUP;
2865 } else {
2866 if (mode & MAY_WRITE)
2867 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2868 if (mode & MAY_EXEC)
2869 args.access |= NFS4_ACCESS_EXECUTE;
2870 }
c407d41a
TM		 2871
2872 res.fattr = nfs_alloc_fattr();
2873 if (res.fattr == NULL)
2874 return -ENOMEM;
2875
7c513058 2876 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2877 if (!status) {
6168f62c 2878 nfs_access_set_mask(entry, res.access);
c407d41a 2879 nfs_refresh_inode(inode, res.fattr);
1da177e4 2880 }
c407d41a 2881 nfs_free_fattr(res.fattr);
1da177e4
LT		 2882 return status;
2883}
2884
2885static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2886{
2887 struct nfs4_exception exception = { };
2888 int err;
2889 do {
2890 err = nfs4_handle_exception(NFS_SERVER(inode),
2891 _nfs4_proc_access(inode, entry),
2892 &exception);
2893 } while (exception.retry);
2894 return err;
2895}
2896
2897/*
2898 * TODO: For the time being, we don't try to get any attributes
2899 * along with any of the zero-copy operations READ, READDIR,
2900 * READLINK, WRITE.
2901 *
2902 * In the case of the first three, we want to put the GETATTR
2903 * after the read-type operation -- this is because it is hard
2904 * to predict the length of a GETATTR response in v4, and thus
2905 * align the READ data correctly. This means that the GETATTR
2906 * may end up partially falling into the page cache, and we should
2907 * shift it into the 'tail' of the xdr_buf before processing.
2908 * To do this efficiently, we need to know the total length
2909 * of data received, which doesn't seem to be available outside
2910 * of the RPC layer.
2911 *
2912 * In the case of WRITE, we also want to put the GETATTR after
2913 * the operation -- in this case because we want to make sure
140150db 2914 * we get the post-operation mtime and size.
1da177e4
LT		 2915 *
2916 * Both of these changes to the XDR layer would in fact be quite
2917 * minor, but I decided to leave them for a subsequent patch.
2918 */
2919static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2920 unsigned int pgbase, unsigned int pglen)
2921{
2922 struct nfs4_readlink args = {
2923 .fh = NFS_FH(inode),
2924 .pgbase = pgbase,
2925 .pglen = pglen,
2926 .pages = &page,
2927 };
f50c7000 2928 struct nfs4_readlink_res res;
1da177e4
LT		 2929 struct rpc_message msg = {
2930 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2931 .rpc_argp = &args,
f50c7000 2932 .rpc_resp = &res,
1da177e4
LT		 2933 };
2934
7c513058 2935 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2936}
2937
2938static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2939 unsigned int pgbase, unsigned int pglen)
2940{
2941 struct nfs4_exception exception = { };
2942 int err;
2943 do {
2944 err = nfs4_handle_exception(NFS_SERVER(inode),
2945 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2946 &exception);
2947 } while (exception.retry);
2948 return err;
2949}
2950
1da177e4 2951/*
8867fe58 2952 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2953 */
1da177e4
LT		 2954static int
2955nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2956 int flags)
1da177e4 2957{
8867fe58 2958 struct nfs_open_context *ctx;
1da177e4 2959 struct nfs4_state *state;
1da177e4
LT		 2960 int status = 0;
2961
8867fe58
MS		 2962 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2963 if (IS_ERR(ctx))
2964 return PTR_ERR(ctx);
2965
a8a5da99 2966 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 2967 state = nfs4_do_open(dir, dentry, ctx->mode,
2968 flags, sattr, ctx->cred,
2969 &ctx->mdsthreshold);
d4d9cdcb 2970 d_drop(dentry);
1da177e4
LT		 2971 if (IS_ERR(state)) {
2972 status = PTR_ERR(state);
c0204fd2 2973 goto out;
1da177e4 2974 }
d4d9cdcb 2975 d_add(dentry, igrab(state->inode));
d75340cc 2976 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 2977 ctx->state = state;
1da177e4 2978out:
8867fe58 2979 put_nfs_open_context(ctx);
1da177e4
LT		 2980 return status;
2981}
2982
2983static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2984{
16e42959 2985 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2986 struct nfs_removeargs args = {
1da177e4 2987 .fh = NFS_FH(dir),
26fe5750 2988 .name = *name,
16e42959 2989 };
4fdc17b2 2990 struct nfs_removeres res = {
16e42959 2991 .server = server,
1da177e4 2992 };
1da177e4 2993 struct rpc_message msg = {
4fdc17b2
TM		 2994 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2995 .rpc_argp = &args,
2996 .rpc_resp = &res,
1da177e4 2997 };
778d2817 2998 int status;
1da177e4 2999
7c513058 3000 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3001 if (status == 0)
16e42959 3002 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3003 return status;
3004}
3005
3006static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3007{
3008 struct nfs4_exception exception = { };
3009 int err;
3010 do {
3011 err = nfs4_handle_exception(NFS_SERVER(dir),
3012 _nfs4_proc_remove(dir, name),
3013 &exception);
3014 } while (exception.retry);
3015 return err;
3016}
3017
e4eff1a6 3018static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3019{
e4eff1a6
TM		 3020 struct nfs_server *server = NFS_SERVER(dir);
3021 struct nfs_removeargs *args = msg->rpc_argp;
3022 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3023
e4eff1a6 3024 res->server = server;
1da177e4 3025 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3026 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 3027}
3028
34e137cc
BS		 3029static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3030{
d9afbd1b
TM		 3031 nfs4_setup_sequence(NFS_SERVER(data->dir),
3032 &data->args.seq_args,
3033 &data->res.seq_res,
3034 task);
1da177e4
LT		 3035}
3036
e4eff1a6 3037static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3038{
e4eff1a6
TM		 3039 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3040
14516c3a
TM		 3041 if (!nfs4_sequence_done(task, &res->seq_res))
3042 return 0;
9e33bed5 3043 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3044 return 0;
3045 update_changeattr(dir, &res->cinfo);
e4eff1a6 3046 return 1;
1da177e4
LT		 3047}
3048
d3d4152a
JL		 3049static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3050{
3051 struct nfs_server *server = NFS_SERVER(dir);
3052 struct nfs_renameargs *arg = msg->rpc_argp;
3053 struct nfs_renameres *res = msg->rpc_resp;
3054
3055 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3056 res->server = server;
9d12b216 3057 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3058}
3059
c6bfa1a1
BS		 3060static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3061{
d9afbd1b
TM		 3062 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3063 &data->args.seq_args,
3064 &data->res.seq_res,
3065 task);
d3d4152a
JL		 3066}
3067
3068static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3069 struct inode *new_dir)
3070{
3071 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3072
3073 if (!nfs4_sequence_done(task, &res->seq_res))
3074 return 0;
3075 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3076 return 0;
3077
3078 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3079 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3080 return 1;
3081}
3082
1da177e4
LT		 3083static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3084 struct inode *new_dir, struct qstr *new_name)
3085{
6caf2c82 3086 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3087 struct nfs_renameargs arg = {
1da177e4
LT		 3088 .old_dir = NFS_FH(old_dir),
3089 .new_dir = NFS_FH(new_dir),
3090 .old_name = old_name,
3091 .new_name = new_name,
6caf2c82 3092 };
e8582a8b 3093 struct nfs_renameres res = {
6caf2c82 3094 .server = server,
1da177e4 3095 };
1da177e4
LT		 3096 struct rpc_message msg = {
3097 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3098 .rpc_argp = &arg,
3099 .rpc_resp = &res,
3100 };
011fff72 3101 int status = -ENOMEM;
1da177e4 3102
7c513058 3103 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3104 if (!status) {
3105 update_changeattr(old_dir, &res.old_cinfo);
3106 update_changeattr(new_dir, &res.new_cinfo);
3107 }
3108 return status;
3109}
3110
3111static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3112 struct inode *new_dir, struct qstr *new_name)
3113{
3114 struct nfs4_exception exception = { };
3115 int err;
3116 do {
3117 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3118 _nfs4_proc_rename(old_dir, old_name,
3119 new_dir, new_name),
3120 &exception);
3121 } while (exception.retry);
3122 return err;
3123}
3124
3125static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3126{
91ba2eee 3127 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3128 struct nfs4_link_arg arg = {
3129 .fh = NFS_FH(inode),
3130 .dir_fh = NFS_FH(dir),
3131 .name = name,
91ba2eee
TM		 3132 .bitmask = server->attr_bitmask,
3133 };
91ba2eee
TM		 3134 struct nfs4_link_res res = {
3135 .server = server,
1da177e4 3136 };
1da177e4
LT		 3137 struct rpc_message msg = {
3138 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3139 .rpc_argp = &arg,
91ba2eee 3140 .rpc_resp = &res,
1da177e4 3141 };
136f2627
TM		 3142 int status = -ENOMEM;
3143
3144 res.fattr = nfs_alloc_fattr();
778d2817 3145 if (res.fattr == NULL)
136f2627 3146 goto out;
1da177e4 3147
7c513058 3148 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3149 if (!status) {
3150 update_changeattr(dir, &res.cinfo);
73a3d07c 3151 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3152 }
136f2627 3153out:
136f2627 3154 nfs_free_fattr(res.fattr);
1da177e4
LT		 3155 return status;
3156}
3157
3158static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3159{
3160 struct nfs4_exception exception = { };
3161 int err;
3162 do {
3163 err = nfs4_handle_exception(NFS_SERVER(inode),
3164 _nfs4_proc_link(inode, dir, name),
3165 &exception);
3166 } while (exception.retry);
3167 return err;
3168}
3169
57dc9a57
TM		 3170struct nfs4_createdata {
3171 struct rpc_message msg;
3172 struct nfs4_create_arg arg;
3173 struct nfs4_create_res res;
3174 struct nfs_fh fh;
3175 struct nfs_fattr fattr;
57dc9a57
TM		 3176};
3177
3178static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3179 struct qstr *name, struct iattr *sattr, u32 ftype)
3180{
3181 struct nfs4_createdata *data;
3182
3183 data = kzalloc(sizeof(*data), GFP_KERNEL);
3184 if (data != NULL) {
3185 struct nfs_server *server = NFS_SERVER(dir);
3186
3187 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3188 data->msg.rpc_argp = &data->arg;
3189 data->msg.rpc_resp = &data->res;
3190 data->arg.dir_fh = NFS_FH(dir);
3191 data->arg.server = server;
3192 data->arg.name = name;
3193 data->arg.attrs = sattr;
3194 data->arg.ftype = ftype;
3195 data->arg.bitmask = server->attr_bitmask;
3196 data->res.server = server;
3197 data->res.fh = &data->fh;
3198 data->res.fattr = &data->fattr;
57dc9a57 3199 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3200 }
3201 return data;
3202}
3203
3204static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3205{
7c513058 3206 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3207 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3208 if (status == 0) {
3209 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3210 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3211 }
3212 return status;
3213}
3214
3215static void nfs4_free_createdata(struct nfs4_createdata *data)
3216{
3217 kfree(data);
3218}
3219
4f390c15 3220static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3221 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3222{
57dc9a57
TM		 3223 struct nfs4_createdata *data;
3224 int status = -ENAMETOOLONG;
1da177e4 3225
94a6d753 3226 if (len > NFS4_MAXPATHLEN)
57dc9a57 3227 goto out;
4f390c15 3228
57dc9a57
TM		 3229 status = -ENOMEM;
3230 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3231 if (data == NULL)
3232 goto out;
3233
3234 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3235 data->arg.u.symlink.pages = &page;
3236 data->arg.u.symlink.len = len;
1da177e4 3237
57dc9a57
TM		 3238 status = nfs4_do_create(dir, dentry, data);
3239
3240 nfs4_free_createdata(data);
3241out:
1da177e4
LT		 3242 return status;
3243}
3244
4f390c15 3245static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3246 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3247{
3248 struct nfs4_exception exception = { };
3249 int err;
3250 do {
3251 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3252 _nfs4_proc_symlink(dir, dentry, page,
3253 len, sattr),
1da177e4
LT		 3254 &exception);
3255 } while (exception.retry);
3256 return err;
3257}
3258
3259static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3260 struct iattr *sattr)
3261{
57dc9a57
TM		 3262 struct nfs4_createdata *data;
3263 int status = -ENOMEM;
1da177e4 3264
57dc9a57
TM		 3265 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3266 if (data == NULL)
3267 goto out;
3268
3269 status = nfs4_do_create(dir, dentry, data);
3270
3271 nfs4_free_createdata(data);
3272out:
1da177e4
LT		 3273 return status;
3274}
3275
3276static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3277 struct iattr *sattr)
3278{
3279 struct nfs4_exception exception = { };
3280 int err;
a8a5da99
AK		 3281
3282 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3283 do {
3284 err = nfs4_handle_exception(NFS_SERVER(dir),
3285 _nfs4_proc_mkdir(dir, dentry, sattr),
3286 &exception);
3287 } while (exception.retry);
3288 return err;
3289}
3290
3291static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3292 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3293{
3294 struct inode *dir = dentry->d_inode;
3295 struct nfs4_readdir_arg args = {
3296 .fh = NFS_FH(dir),
56e4ebf8 3297 .pages = pages,
1da177e4
LT		 3298 .pgbase = 0,
3299 .count = count,
96d25e53 3300 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3301 .plus = plus,
1da177e4
LT		 3302 };
3303 struct nfs4_readdir_res res;
3304 struct rpc_message msg = {
3305 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3306 .rpc_argp = &args,
3307 .rpc_resp = &res,
3308 .rpc_cred = cred,
3309 };
3310 int status;
3311
3110ff80 3312 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3313 dentry->d_parent->d_name.name,
3314 dentry->d_name.name,
3315 (unsigned long long)cookie);
c3f52af3 3316 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3317 res.pgbase = args.pgbase;
7c513058 3318 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3319 if (status >= 0) {
c3f52af3 3320 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3321 status += args.pgbase;
3322 }
c4812998
TM		 3323
3324 nfs_invalidate_atime(dir);
3325
3110ff80 3326 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3327 return status;
3328}
3329
3330static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3331 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3332{
3333 struct nfs4_exception exception = { };
3334 int err;
3335 do {
3336 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3337 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3338 pages, count, plus),
1da177e4
LT		 3339 &exception);
3340 } while (exception.retry);
3341 return err;
3342}
3343
3344static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3345 struct iattr *sattr, dev_t rdev)
3346{
57dc9a57
TM		 3347 struct nfs4_createdata *data;
3348 int mode = sattr->ia_mode;
3349 int status = -ENOMEM;
1da177e4 3350
57dc9a57
TM		 3351 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3352 if (data == NULL)
3353 goto out;
3354
1da177e4 3355 if (S_ISFIFO(mode))
57dc9a57 3356 data->arg.ftype = NF4FIFO;
1da177e4 3357 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3358 data->arg.ftype = NF4BLK;
3359 data->arg.u.device.specdata1 = MAJOR(rdev);
3360 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3361 }
3362 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3363 data->arg.ftype = NF4CHR;
3364 data->arg.u.device.specdata1 = MAJOR(rdev);
3365 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3366 } else if (!S_ISSOCK(mode)) {
3367 status = -EINVAL;
3368 goto out_free;
1da177e4 3369 }
1da177e4 3370
57dc9a57 3371 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3372out_free:
57dc9a57
TM		 3373 nfs4_free_createdata(data);
3374out:
1da177e4
LT		 3375 return status;
3376}
3377
3378static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3379 struct iattr *sattr, dev_t rdev)
3380{
3381 struct nfs4_exception exception = { };
3382 int err;
a8a5da99
AK		 3383
3384 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3385 do {
3386 err = nfs4_handle_exception(NFS_SERVER(dir),
3387 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3388 &exception);
3389 } while (exception.retry);
3390 return err;
3391}
3392
3393static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3394 struct nfs_fsstat *fsstat)
3395{
3396 struct nfs4_statfs_arg args = {
3397 .fh = fhandle,
3398 .bitmask = server->attr_bitmask,
3399 };
24ad148a
BH		 3400 struct nfs4_statfs_res res = {
3401 .fsstat = fsstat,
3402 };
1da177e4
LT		 3403 struct rpc_message msg = {
3404 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3405 .rpc_argp = &args,
24ad148a 3406 .rpc_resp = &res,
1da177e4
LT		 3407 };
3408
0e574af1 3409 nfs_fattr_init(fsstat->fattr);
7c513058 3410 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3411}
3412
3413static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3414{
3415 struct nfs4_exception exception = { };
3416 int err;
3417 do {
3418 err = nfs4_handle_exception(server,
3419 _nfs4_proc_statfs(server, fhandle, fsstat),
3420 &exception);
3421 } while (exception.retry);
3422 return err;
3423}
3424
3425static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3426 struct nfs_fsinfo *fsinfo)
3427{
3428 struct nfs4_fsinfo_arg args = {
3429 .fh = fhandle,
3430 .bitmask = server->attr_bitmask,
3431 };
3dda5e43
BH		 3432 struct nfs4_fsinfo_res res = {
3433 .fsinfo = fsinfo,
3434 };
1da177e4
LT		 3435 struct rpc_message msg = {
3436 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3437 .rpc_argp = &args,
3dda5e43 3438 .rpc_resp = &res,
1da177e4
LT		 3439 };
3440
7c513058 3441 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3442}
3443
3444static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3445{
3446 struct nfs4_exception exception = { };
3447 int err;
3448
3449 do {
3450 err = nfs4_handle_exception(server,
3451 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3452 &exception);
3453 } while (exception.retry);
3454 return err;
3455}
3456
3457static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3458{
e38eb650
BS		 3459 int error;
3460
0e574af1 3461 nfs_fattr_init(fsinfo->fattr);
e38eb650 3462 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3463 if (error == 0) {
3464 /* block layout checks this! */
3465 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3466 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3467 }
e38eb650
BS		 3468
3469 return error;
1da177e4
LT		 3470}
3471
3472static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3473 struct nfs_pathconf *pathconf)
3474{
3475 struct nfs4_pathconf_arg args = {
3476 .fh = fhandle,
3477 .bitmask = server->attr_bitmask,
3478 };
d45b2989
BH		 3479 struct nfs4_pathconf_res res = {
3480 .pathconf = pathconf,
3481 };
1da177e4
LT		 3482 struct rpc_message msg = {
3483 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3484 .rpc_argp = &args,
d45b2989 3485 .rpc_resp = &res,
1da177e4
LT		 3486 };
3487
3488 /* None of the pathconf attributes are mandatory to implement */
3489 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3490 memset(pathconf, 0, sizeof(*pathconf));
3491 return 0;
3492 }
3493
0e574af1 3494 nfs_fattr_init(pathconf->fattr);
7c513058 3495 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3496}
3497
3498static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3499 struct nfs_pathconf *pathconf)
3500{
3501 struct nfs4_exception exception = { };
3502 int err;
3503
3504 do {
3505 err = nfs4_handle_exception(server,
3506 _nfs4_proc_pathconf(server, fhandle, pathconf),
3507 &exception);
3508 } while (exception.retry);
3509 return err;
3510}
3511
5521abfd 3512int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3513 const struct nfs_open_context *ctx,
3514 const struct nfs_lock_context *l_ctx,
3515 fmode_t fmode)
3516{
3517 const struct nfs_lockowner *lockowner = NULL;
3518
3519 if (l_ctx != NULL)
3520 lockowner = &l_ctx->lockowner;
5521abfd 3521 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3522}
3523EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3524
5521abfd
TM		 3525static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3526 const struct nfs_open_context *ctx,
3527 const struct nfs_lock_context *l_ctx,
3528 fmode_t fmode)
3529{
3530 nfs4_stateid current_stateid;
3531
3532 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3533 return false;
3534 return nfs4_stateid_match(stateid, &current_stateid);
3535}
3536
3537static bool nfs4_error_stateid_expired(int err)
3538{
3539 switch (err) {
3540 case -NFS4ERR_DELEG_REVOKED:
3541 case -NFS4ERR_ADMIN_REVOKED:
3542 case -NFS4ERR_BAD_STATEID:
3543 case -NFS4ERR_STALE_STATEID:
3544 case -NFS4ERR_OLD_STATEID:
3545 case -NFS4ERR_OPENMODE:
3546 case -NFS4ERR_EXPIRED:
3547 return true;
3548 }
3549 return false;
3550}
3551
d20581aa
BH		 3552void __nfs4_read_done_cb(struct nfs_read_data *data)
3553{
cd841605 3554 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3555}
3556
cbdabc7f 3557static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3558{
cd841605 3559 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3560
9e33bed5 3561 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3562 rpc_restart_call_prepare(task);
ec06c096 3563 return -EAGAIN;
1da177e4 3564 }
8850df99 3565
d20581aa 3566 __nfs4_read_done_cb(data);
1da177e4 3567 if (task->tk_status > 0)
ec06c096
TM		 3568 renew_lease(server, data->timestamp);
3569 return 0;
1da177e4
LT		 3570}
3571
5521abfd
TM		 3572static bool nfs4_read_stateid_changed(struct rpc_task *task,
3573 struct nfs_readargs *args)
3574{
3575
3576 if (!nfs4_error_stateid_expired(task->tk_status) ||
3577 nfs4_stateid_is_current(&args->stateid,
3578 args->context,
3579 args->lock_context,
3580 FMODE_READ))
3581 return false;
3582 rpc_restart_call_prepare(task);
3583 return true;
3584}
3585
cbdabc7f
AA		 3586static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3587{
3588
3589 dprintk("--> %s\n", __func__);
3590
3591 if (!nfs4_sequence_done(task, &data->res.seq_res))
3592 return -EAGAIN;
5521abfd
TM		 3593 if (nfs4_read_stateid_changed(task, &data->args))
3594 return -EAGAIN;
d20581aa
BH		 3595 return data->read_done_cb ? data->read_done_cb(task, data) :
3596 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3597}
3598
bdc7f021 3599static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3600{
1da177e4 3601 data->timestamp = jiffies;
cbdabc7f 3602 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3603 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3604 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3605}
3606
ea7c3303
BS		 3607static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3608{
9b206149 3609 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3610 &data->args.seq_args,
3611 &data->res.seq_res,
9b206149
TM		 3612 task))
3613 return;
3614 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3615 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3616}
3617
b029bc9b 3618static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3619{
cd841605 3620 struct inode *inode = data->header->inode;
1da177e4 3621
9e33bed5 3622 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3623 rpc_restart_call_prepare(task);
788e7a89 3624 return -EAGAIN;
1da177e4 3625 }
4f9838c7 3626 if (task->tk_status >= 0) {
1da177e4 3627 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3628 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3629 }
788e7a89 3630 return 0;
1da177e4
LT		 3631}
3632
5521abfd
TM		 3633static bool nfs4_write_stateid_changed(struct rpc_task *task,
3634 struct nfs_writeargs *args)
3635{
3636
3637 if (!nfs4_error_stateid_expired(task->tk_status) ||
3638 nfs4_stateid_is_current(&args->stateid,
3639 args->context,
3640 args->lock_context,
3641 FMODE_WRITE))
3642 return false;
3643 rpc_restart_call_prepare(task);
3644 return true;
3645}
3646
b029bc9b
FI		 3647static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3648{
3649 if (!nfs4_sequence_done(task, &data->res.seq_res))
3650 return -EAGAIN;
5521abfd
TM		 3651 if (nfs4_write_stateid_changed(task, &data->args))
3652 return -EAGAIN;
d20581aa
BH		 3653 return data->write_done_cb ? data->write_done_cb(task, data) :
3654 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3655}
3656
5a37f851
TM		 3657static
3658bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3659{
5a37f851
TM		 3660 const struct nfs_pgio_header *hdr = data->header;
3661
3662 /* Don't request attributes for pNFS or O_DIRECT writes */
3663 if (data->ds_clp != NULL || hdr->dreq != NULL)
3664 return false;
3665 /* Otherwise, request attributes if and only if we don't hold
3666 * a delegation
3667 */
011e2a7f 3668 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3669}
a69aef14 3670
bdc7f021 3671static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3672{
cd841605 3673 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3674
5a37f851 3675 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3676 data->args.bitmask = NULL;
3677 data->res.fattr = NULL;
3678 } else
3679 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3680
b029bc9b
FI		 3681 if (!data->write_done_cb)
3682 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3683 data->res.server = server;
1da177e4
LT		 3684 data->timestamp = jiffies;
3685
bdc7f021 3686 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3687 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3688}
3689
c6cb80d0
BS		 3690static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3691{
9b206149 3692 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3693 &data->args.seq_args,
3694 &data->res.seq_res,
9b206149
TM		 3695 task))
3696 return;
3697 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3698 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 3699}
3700
0b7c0153 3701static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3702{
d9afbd1b
TM		 3703 nfs4_setup_sequence(NFS_SERVER(data->inode),
3704 &data->args.seq_args,
3705 &data->res.seq_res,
3706 task);
1da177e4
LT		 3707}
3708
0b7c0153 3709static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3710{
1da177e4 3711 struct inode *inode = data->inode;
14516c3a 3712
9e33bed5 3713 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3714 rpc_restart_call_prepare(task);
788e7a89 3715 return -EAGAIN;
1da177e4 3716 }
788e7a89 3717 return 0;
1da177e4
LT		 3718}
3719
0b7c0153 3720static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3721{
3722 if (!nfs4_sequence_done(task, &data->res.seq_res))
3723 return -EAGAIN;
0b7c0153 3724 return data->commit_done_cb(task, data);
5f452431
FI		 3725}
3726
0b7c0153 3727static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3728{
788e7a89 3729 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3730
0b7c0153
FI		 3731 if (data->commit_done_cb == NULL)
3732 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3733 data->res.server = server;
bdc7f021 3734 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3735 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3736}
3737
9bc4e3ca
CL		 3738struct nfs4_renewdata {
3739 struct nfs_client *client;
3740 unsigned long timestamp;
3741};
3742
1da177e4
LT		 3743/*
3744 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3745 * standalone procedure for queueing an asynchronous RENEW.
3746 */
9bc4e3ca 3747static void nfs4_renew_release(void *calldata)
dc96aef9 3748{
9bc4e3ca
CL		 3749 struct nfs4_renewdata *data = calldata;
3750 struct nfs_client *clp = data->client;
dc96aef9 3751
0851de06
AB		 3752 if (atomic_read(&clp->cl_count) > 1)
3753 nfs4_schedule_state_renewal(clp);
3754 nfs_put_client(clp);
9bc4e3ca 3755 kfree(data);
dc96aef9
AB		 3756}
3757
9bc4e3ca 3758static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3759{
9bc4e3ca
CL		 3760 struct nfs4_renewdata *data = calldata;
3761 struct nfs_client *clp = data->client;
3762 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3763
3764 if (task->tk_status < 0) {
95baa25c 3765 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3766 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3767 return;
3768 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3769 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3770 return;
3771 }
3772 nfs4_schedule_path_down_recovery(clp);
1da177e4 3773 }
452e9352 3774 do_renew_lease(clp, timestamp);
1da177e4
LT		 3775}
3776
963d8fe5
TM		 3777static const struct rpc_call_ops nfs4_renew_ops = {
3778 .rpc_call_done = nfs4_renew_done,
dc96aef9 3779 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3780};
3781
2f60ea6b 3782static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3783{
3784 struct rpc_message msg = {
3785 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3786 .rpc_argp = clp,
b4454fe1 3787 .rpc_cred = cred,
1da177e4 3788 };
9bc4e3ca 3789 struct nfs4_renewdata *data;
1da177e4 3790
2f60ea6b
TM		 3791 if (renew_flags == 0)
3792 return 0;
0851de06
AB		 3793 if (!atomic_inc_not_zero(&clp->cl_count))
3794 return -EIO;
b569ad34 3795 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3796 if (data == NULL)
3797 return -ENOMEM;
3798 data->client = clp;
3799 data->timestamp = jiffies;
1da177e4 3800 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3801 &nfs4_renew_ops, data);
1da177e4
LT		 3802}
3803
8534d4ec 3804static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3805{
3806 struct rpc_message msg = {
3807 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3808 .rpc_argp = clp,
b4454fe1 3809 .rpc_cred = cred,
1da177e4
LT		 3810 };
3811 unsigned long now = jiffies;
3812 int status;
3813
3814 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3815 if (status < 0)
3816 return status;
452e9352 3817 do_renew_lease(clp, now);
1da177e4
LT		 3818 return 0;
3819}
3820
aa1870af
BF		 3821static inline int nfs4_server_supports_acls(struct nfs_server *server)
3822{
3823 return (server->caps & NFS_CAP_ACLS)
3824 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3825 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3826}
3827
21f498c2
TM		 3828/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3829 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3830 * the stack.
3831 */
21f498c2 3832#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3833
e9e3d724
NH		 3834static int buf_to_pages_noslab(const void *buf, size_t buflen,
3835 struct page **pages, unsigned int *pgbase)
3836{
3837 struct page *newpage, **spages;
3838 int rc = 0;
3839 size_t len;
3840 spages = pages;
3841
3842 do {
21f498c2 3843 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3844 newpage = alloc_page(GFP_KERNEL);
3845
3846 if (newpage == NULL)
3847 goto unwind;
3848 memcpy(page_address(newpage), buf, len);
3849 buf += len;
3850 buflen -= len;
3851 *pages++ = newpage;
3852 rc++;
3853 } while (buflen != 0);
3854
3855 return rc;
3856
3857unwind:
3858 for(; rc > 0; rc--)
3859 __free_page(spages[rc-1]);
3860 return -ENOMEM;
3861}
3862
e50a1c2e
BF		 3863struct nfs4_cached_acl {
3864 int cached;
3865 size_t len;
3e9d4154 3866 char data[0];
e50a1c2e
BF		 3867};
3868
3869static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3870{
3871 struct nfs_inode *nfsi = NFS_I(inode);
3872
3873 spin_lock(&inode->i_lock);
3874 kfree(nfsi->nfs4_acl);
3875 nfsi->nfs4_acl = acl;
3876 spin_unlock(&inode->i_lock);
3877}
3878
3879static void nfs4_zap_acl_attr(struct inode *inode)
3880{
3881 nfs4_set_cached_acl(inode, NULL);
3882}
3883
3884static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3885{
3886 struct nfs_inode *nfsi = NFS_I(inode);
3887 struct nfs4_cached_acl *acl;
3888 int ret = -ENOENT;
3889
3890 spin_lock(&inode->i_lock);
3891 acl = nfsi->nfs4_acl;
3892 if (acl == NULL)
3893 goto out;
3894 if (buf == NULL) /* user is just asking for length */
3895 goto out_len;
3896 if (acl->cached == 0)
3897 goto out;
3898 ret = -ERANGE; /* see getxattr(2) man page */
3899 if (acl->len > buflen)
3900 goto out;
3901 memcpy(buf, acl->data, acl->len);
3902out_len:
3903 ret = acl->len;
3904out:
3905 spin_unlock(&inode->i_lock);
3906 return ret;
3907}
3908
5794d21e 3909static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3910{
3911 struct nfs4_cached_acl *acl;
b291f1b1 3912 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3913
1f1ea6c2 3914 if (buflen <= PAGE_SIZE) {
b291f1b1 3915 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3916 if (acl == NULL)
3917 goto out;
3918 acl->cached = 1;
5794d21e 3919 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3920 } else {
3921 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3922 if (acl == NULL)
3923 goto out;
3924 acl->cached = 0;
3925 }
3926 acl->len = acl_len;
3927out:
3928 nfs4_set_cached_acl(inode, acl);
3929}
3930
bf118a34
AA		 3931/*
3932 * The getxattr API returns the required buffer length when called with a
3933 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3934 * the required buf. On a NULL buf, we send a page of data to the server
3935 * guessing that the ACL request can be serviced by a page. If so, we cache
3936 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3937 * the cache. If not so, we throw away the page, and cache the required
3938 * length. The next getxattr call will then produce another round trip to
3939 * the server, this time with the input buf of the required size.
3940 */
16b4289c 3941static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3942{
bf118a34 3943 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3944 struct nfs_getaclargs args = {
3945 .fh = NFS_FH(inode),
3946 .acl_pages = pages,
3947 .acl_len = buflen,
3948 };
663c79b3
BH		 3949 struct nfs_getaclres res = {
3950 .acl_len = buflen,
3951 };
aa1870af
BF		 3952 struct rpc_message msg = {
3953 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3954 .rpc_argp = &args,
663c79b3 3955 .rpc_resp = &res,
aa1870af 3956 };
21f498c2
TM		 3957 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3958 int ret = -ENOMEM, i;
aa1870af 3959
bf118a34
AA		 3960 /* As long as we're doing a round trip to the server anyway,
3961 * let's be prepared for a page of acl data. */
3962 if (npages == 0)
3963 npages = 1;
21f498c2
TM		 3964 if (npages > ARRAY_SIZE(pages))
3965 return -ERANGE;
5a006899 3966
bf118a34
AA		 3967 for (i = 0; i < npages; i++) {
3968 pages[i] = alloc_page(GFP_KERNEL);
3969 if (!pages[i])
3970 goto out_free;
e50a1c2e 3971 }
5a006899
SP		 3972
3973 /* for decoding across pages */
3974 res.acl_scratch = alloc_page(GFP_KERNEL);
3975 if (!res.acl_scratch)
3976 goto out_free;
3977
bf118a34
AA		 3978 args.acl_len = npages * PAGE_SIZE;
3979 args.acl_pgbase = 0;
5a006899 3980
de040bec 3981 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3982 __func__, buf, buflen, npages, args.acl_len);
3983 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3984 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3985 if (ret)
3986 goto out_free;
bf118a34 3987
1f1ea6c2
TM		 3988 /* Handle the case where the passed-in buffer is too short */
3989 if (res.acl_flags & NFS4_ACL_TRUNC) {
3990 /* Did the user only issue a request for the acl length? */
3991 if (buf == NULL)
3992 goto out_ok;
e50a1c2e 3993 ret = -ERANGE;
1f1ea6c2 3994 goto out_free;
e50a1c2e 3995 }
1f1ea6c2 3996 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 3997 if (buf) {
3998 if (res.acl_len > buflen) {
3999 ret = -ERANGE;
4000 goto out_free;
4001 }
1f1ea6c2 4002 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4003 }
1f1ea6c2
TM		 4004out_ok:
4005 ret = res.acl_len;
e50a1c2e 4006out_free:
bf118a34
AA		 4007 for (i = 0; i < npages; i++)
4008 if (pages[i])
4009 __free_page(pages[i]);
331818f1
TM		 4010 if (res.acl_scratch)
4011 __free_page(res.acl_scratch);
aa1870af
BF		 4012 return ret;
4013}
4014
16b4289c
TM		 4015static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4016{
4017 struct nfs4_exception exception = { };
4018 ssize_t ret;
4019 do {
4020 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4021 if (ret >= 0)
4022 break;
4023 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4024 } while (exception.retry);
4025 return ret;
4026}
4027
e50a1c2e
BF		 4028static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4029{
4030 struct nfs_server *server = NFS_SERVER(inode);
4031 int ret;
4032
4033 if (!nfs4_server_supports_acls(server))
4034 return -EOPNOTSUPP;
4035 ret = nfs_revalidate_inode(server, inode);
4036 if (ret < 0)
4037 return ret;
08a22b39
AK		 4038 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4039 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4040 ret = nfs4_read_cached_acl(inode, buf, buflen);
4041 if (ret != -ENOENT)
bf118a34
AA		 4042 /* -ENOENT is returned if there is no ACL or if there is an ACL
4043 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4044 return ret;
4045 return nfs4_get_acl_uncached(inode, buf, buflen);
4046}
4047
16b4289c 4048static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4049{
4050 struct nfs_server *server = NFS_SERVER(inode);
4051 struct page *pages[NFS4ACL_MAXPAGES];
4052 struct nfs_setaclargs arg = {
4053 .fh = NFS_FH(inode),
4054 .acl_pages = pages,
4055 .acl_len = buflen,
4056 };
73c403a9 4057 struct nfs_setaclres res;
4b580ee3
BF		 4058 struct rpc_message msg = {
4059 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4060 .rpc_argp = &arg,
73c403a9 4061 .rpc_resp = &res,
4b580ee3 4062 };
21f498c2 4063 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4064 int ret, i;
4b580ee3
BF		 4065
4066 if (!nfs4_server_supports_acls(server))
4067 return -EOPNOTSUPP;
21f498c2
TM		 4068 if (npages > ARRAY_SIZE(pages))
4069 return -ERANGE;
e9e3d724
NH		 4070 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4071 if (i < 0)
4072 return i;
57ec14c5 4073 nfs4_inode_return_delegation(inode);
7c513058 4074 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4075
4076 /*
4077 * Free each page after tx, so the only ref left is
4078 * held by the network stack
4079 */
4080 for (; i > 0; i--)
4081 put_page(pages[i-1]);
4082
08a22b39
AK		 4083 /*
4084 * Acl update can result in inode attribute update.
4085 * so mark the attribute cache invalid.
4086 */
4087 spin_lock(&inode->i_lock);
4088 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4089 spin_unlock(&inode->i_lock);
f41f7418
TM		 4090 nfs_access_zap_cache(inode);
4091 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4092 return ret;
4093}
4094
16b4289c
TM		 4095static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4096{
4097 struct nfs4_exception exception = { };
4098 int err;
4099 do {
4100 err = nfs4_handle_exception(NFS_SERVER(inode),
4101 __nfs4_proc_set_acl(inode, buf, buflen),
4102 &exception);
4103 } while (exception.retry);
4104 return err;
4105}
4106
1da177e4 4107static int
aa5190d0 4108nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4109{
aa5190d0
TM		 4110 struct nfs_client *clp = server->nfs_client;
4111
4112 if (task->tk_status >= 0)
1da177e4
LT		 4113 return 0;
4114 switch(task->tk_status) {
a1d0b5ee 4115 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4116 case -NFS4ERR_ADMIN_REVOKED:
4117 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4118 if (state == NULL)
4119 break;
4120 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4121 case -NFS4ERR_OPENMODE:
4122 if (state == NULL)
4123 break;
5d422301
TM		 4124 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4125 goto stateid_invalid;
0400a6b0 4126 goto wait_on_recovery;
0ced63d1 4127 case -NFS4ERR_EXPIRED:
5d422301
TM		 4128 if (state != NULL) {
4129 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4130 goto stateid_invalid;
4131 }
1da177e4 4132 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4133 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4134 nfs4_schedule_lease_recovery(clp);
4135 goto wait_on_recovery;
4745e315
AA		 4136#if defined(CONFIG_NFS_V4_1)
4137 case -NFS4ERR_BADSESSION:
4138 case -NFS4ERR_BADSLOT:
4139 case -NFS4ERR_BAD_HIGH_SLOT:
4140 case -NFS4ERR_DEADSESSION:
4141 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4142 case -NFS4ERR_SEQ_FALSE_RETRY:
4143 case -NFS4ERR_SEQ_MISORDERED:
4144 dprintk("%s ERROR %d, Reset session\n", __func__,
4145 task->tk_status);
9f594791 4146 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4147 task->tk_status = 0;
4148 return -EAGAIN;
4149#endif /* CONFIG_NFS_V4_1 */
1da177e4 4150 case -NFS4ERR_DELAY:
aa5190d0 4151 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4152 case -NFS4ERR_GRACE:
1da177e4
LT		 4153 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4154 task->tk_status = 0;
4155 return -EAGAIN;
a8a4ae3a 4156 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4157 case -NFS4ERR_OLD_STATEID:
4158 task->tk_status = 0;
4159 return -EAGAIN;
4160 }
4161 task->tk_status = nfs4_map_errors(task->tk_status);
4162 return 0;
5d422301
TM		 4163stateid_invalid:
4164 task->tk_status = -EIO;
4165 return 0;
0400a6b0 4166wait_on_recovery:
a2c0b9e2 4167 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4168 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4169 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4170 task->tk_status = 0;
4171 return -EAGAIN;
1da177e4
LT		 4172}
4173
f092075d
CL		 4174static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4175 nfs4_verifier *bootverf)
cd93710e
CL		 4176{
4177 __be32 verf[2];
4178
2c820d9a
CL		 4179 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4180 /* An impossible timestamp guarantees this value
4181 * will never match a generated boot time. */
4182 verf[0] = 0;
4183 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4184 } else {
f092075d
CL		 4185 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4186 verf[0] = (__be32)nn->boot_time.tv_sec;
4187 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4188 }
cd93710e
CL		 4189 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4190}
4191
e984a55a
CL		 4192static unsigned int
4193nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4194 char *buf, size_t len)
4195{
4196 unsigned int result;
4197
4198 rcu_read_lock();
4199 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4200 clp->cl_ipaddr,
4201 rpc_peeraddr2str(clp->cl_rpcclient,
4202 RPC_DISPLAY_ADDR),
4203 rpc_peeraddr2str(clp->cl_rpcclient,
4204 RPC_DISPLAY_PROTO));
4205 rcu_read_unlock();
4206 return result;
4207}
4208
4209static unsigned int
4210nfs4_init_uniform_client_string(const struct nfs_client *clp,
4211 char *buf, size_t len)
4212{
6f2ea7f2
CL		 4213 char *nodename = clp->cl_rpcclient->cl_nodename;
4214
4215 if (nfs4_client_id_uniquifier[0] != '\0')
4216 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4217 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4218 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4219 nodename);
e984a55a
CL		 4220}
4221
6bbb4ae8
CL		 4222/**
4223 * nfs4_proc_setclientid - Negotiate client ID
4224 * @clp: state data structure
4225 * @program: RPC program for NFSv4 callback service
4226 * @port: IP port number for NFS4 callback service
4227 * @cred: RPC credential to use for this call
4228 * @res: where to place the result
4229 *
4230 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4231 */
bb8b27e5
TM		 4232int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4233 unsigned short port, struct rpc_cred *cred,
4234 struct nfs4_setclientid_res *res)
1da177e4
LT		 4235{
4236 nfs4_verifier sc_verifier;
4237 struct nfs4_setclientid setclientid = {
4238 .sc_verifier = &sc_verifier,
4239 .sc_prog = program,
f4eecd5d 4240 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4241 };
4242 struct rpc_message msg = {
4243 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4244 .rpc_argp = &setclientid,
bb8b27e5 4245 .rpc_resp = res,
286d7d6a 4246 .rpc_cred = cred,
1da177e4 4247 };
6bbb4ae8 4248 int status;
1da177e4 4249
de734831 4250 /* nfs_client_id4 */
f092075d 4251 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4252 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4253 setclientid.sc_name_len =
4254 nfs4_init_uniform_client_string(clp,
4255 setclientid.sc_name,
4256 sizeof(setclientid.sc_name));
4257 else
4258 setclientid.sc_name_len =
4259 nfs4_init_nonuniform_client_string(clp,
4260 setclientid.sc_name,
4261 sizeof(setclientid.sc_name));
de734831 4262 /* cb_client4 */
e984a55a 4263 rcu_read_lock();
de734831 4264 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4265 sizeof(setclientid.sc_netid),
4266 rpc_peeraddr2str(clp->cl_rpcclient,
4267 RPC_DISPLAY_NETID));
de734831
CL		 4268 rcu_read_unlock();
4269 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4270 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4271 clp->cl_ipaddr, port >> 8, port & 255);
4272
6bbb4ae8
CL		 4273 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4274 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4275 setclientid.sc_name_len, setclientid.sc_name);
4276 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4277 dprintk("NFS reply setclientid: %d\n", status);
4278 return status;
1da177e4
LT		 4279}
4280
6bbb4ae8
CL		 4281/**
4282 * nfs4_proc_setclientid_confirm - Confirm client ID
4283 * @clp: state data structure
4284 * @res: result of a previous SETCLIENTID
4285 * @cred: RPC credential to use for this call
4286 *
4287 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4288 */
fd954ae1 4289int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4290 struct nfs4_setclientid_res *arg,
4291 struct rpc_cred *cred)
1da177e4
LT		 4292{
4293 struct nfs_fsinfo fsinfo;
4294 struct rpc_message msg = {
4295 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4296 .rpc_argp = arg,
1da177e4 4297 .rpc_resp = &fsinfo,
286d7d6a 4298 .rpc_cred = cred,
1da177e4
LT		 4299 };
4300 unsigned long now;
4301 int status;
4302
6bbb4ae8
CL		 4303 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4304 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4305 clp->cl_clientid);
1da177e4 4306 now = jiffies;
1bd714f2 4307 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4308 if (status == 0) {
4309 spin_lock(&clp->cl_lock);
4310 clp->cl_lease_time = fsinfo.lease_time * HZ;
4311 clp->cl_last_renewal = now;
4312 spin_unlock(&clp->cl_lock);
4313 }
6bbb4ae8 4314 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4315 return status;
4316}
4317
fe650407
TM		 4318struct nfs4_delegreturndata {
4319 struct nfs4_delegreturnargs args;
fa178f29 4320 struct nfs4_delegreturnres res;
fe650407
TM		 4321 struct nfs_fh fh;
4322 nfs4_stateid stateid;
26e976a8 4323 unsigned long timestamp;
fa178f29 4324 struct nfs_fattr fattr;
fe650407
TM		 4325 int rpc_status;
4326};
4327
fe650407
TM		 4328static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4329{
4330 struct nfs4_delegreturndata *data = calldata;
938e1010 4331
14516c3a
TM		 4332 if (!nfs4_sequence_done(task, &data->res.seq_res))
4333 return;
938e1010 4334
79708861
RL		 4335 switch (task->tk_status) {
4336 case -NFS4ERR_STALE_STATEID:
4337 case -NFS4ERR_EXPIRED:
4338 case 0:
fa178f29 4339 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4340 break;
4341 default:
4342 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4343 -EAGAIN) {
d00c5d43 4344 rpc_restart_call_prepare(task);
79708861
RL		 4345 return;
4346 }
4347 }
4348 data->rpc_status = task->tk_status;
fe650407
TM		 4349}
4350
4351static void nfs4_delegreturn_release(void *calldata)
4352{
fe650407
TM		 4353 kfree(calldata);
4354}
4355
938e1010
AA		 4356#if defined(CONFIG_NFS_V4_1)
4357static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4358{
4359 struct nfs4_delegreturndata *d_data;
4360
4361 d_data = (struct nfs4_delegreturndata *)data;
4362
d9afbd1b
TM		 4363 nfs4_setup_sequence(d_data->res.server,
4364 &d_data->args.seq_args,
4365 &d_data->res.seq_res,
4366 task);
938e1010
AA		 4367}
4368#endif /* CONFIG_NFS_V4_1 */
4369
c8d149f3 4370static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4371#if defined(CONFIG_NFS_V4_1)
4372 .rpc_call_prepare = nfs4_delegreturn_prepare,
4373#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4374 .rpc_call_done = nfs4_delegreturn_done,
4375 .rpc_release = nfs4_delegreturn_release,
4376};
4377
e6f81075 4378static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4379{
4380 struct nfs4_delegreturndata *data;
fa178f29 4381 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4382 struct rpc_task *task;
5138fde0
TM		 4383 struct rpc_message msg = {
4384 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4385 .rpc_cred = cred,
4386 };
c970aa85
TM		 4387 struct rpc_task_setup task_setup_data = {
4388 .rpc_client = server->client,
5138fde0 4389 .rpc_message = &msg,
c970aa85
TM		 4390 .callback_ops = &nfs4_delegreturn_ops,
4391 .flags = RPC_TASK_ASYNC,
4392 };
e6f81075 4393 int status = 0;
fe650407 4394
8535b2be 4395 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4396 if (data == NULL)
4397 return -ENOMEM;
9d12b216 4398 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4399 data->args.fhandle = &data->fh;
4400 data->args.stateid = &data->stateid;
9e907fec 4401 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4402 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4403 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4404 data->res.fattr = &data->fattr;
4405 data->res.server = server;
5138fde0 4406 nfs_fattr_init(data->res.fattr);
26e976a8 4407 data->timestamp = jiffies;
fe650407
TM		 4408 data->rpc_status = 0;
4409
c970aa85 4410 task_setup_data.callback_data = data;
1174dd1f
TM		 4411 msg.rpc_argp = &data->args;
4412 msg.rpc_resp = &data->res;
c970aa85 4413 task = rpc_run_task(&task_setup_data);
7a1218a2 4414 if (IS_ERR(task))
fe650407 4415 return PTR_ERR(task);
e6f81075
TM		 4416 if (!issync)
4417 goto out;
fe650407 4418 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4419 if (status != 0)
4420 goto out;
4421 status = data->rpc_status;
e144cbcc
TM		 4422 if (status == 0)
4423 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4424 else
4425 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4426out:
e6b3c4db 4427 rpc_put_task(task);
fe650407 4428 return status;
1da177e4
LT		 4429}
4430
e6f81075 4431int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4432{
4433 struct nfs_server *server = NFS_SERVER(inode);
4434 struct nfs4_exception exception = { };
4435 int err;
4436 do {
e6f81075 4437 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4438 switch (err) {
4439 case -NFS4ERR_STALE_STATEID:
4440 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4441 case 0:
4442 return 0;
4443 }
4444 err = nfs4_handle_exception(server, err, &exception);
4445 } while (exception.retry);
4446 return err;
4447}
4448
4449#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4450#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4451
4452/*
4453 * sleep, with exponential backoff, and retry the LOCK operation.
4454 */
4455static unsigned long
4456nfs4_set_lock_task_retry(unsigned long timeout)
4457{
d310310c 4458 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4459 timeout <<= 1;
4460 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4461 return NFS4_LOCK_MAXTIMEOUT;
4462 return timeout;
4463}
4464
1da177e4
LT		 4465static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4466{
4467 struct inode *inode = state->inode;
4468 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4469 struct nfs_client *clp = server->nfs_client;
911d1aaf 4470 struct nfs_lockt_args arg = {
1da177e4 4471 .fh = NFS_FH(inode),
911d1aaf 4472 .fl = request,
1da177e4 4473 };
911d1aaf
TM		 4474 struct nfs_lockt_res res = {
4475 .denied = request,
1da177e4
LT		 4476 };
4477 struct rpc_message msg = {
4478 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4479 .rpc_argp = &arg,
4480 .rpc_resp = &res,
4481 .rpc_cred = state->owner->so_cred,
4482 };
1da177e4
LT		 4483 struct nfs4_lock_state *lsp;
4484 int status;
4485
911d1aaf 4486 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4487 status = nfs4_set_lock_state(state, request);
4488 if (status != 0)
4489 goto out;
4490 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4491 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4492 arg.lock_owner.s_dev = server->s_dev;
7c513058 4493 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4494 switch (status) {
4495 case 0:
4496 request->fl_type = F_UNLCK;
4497 break;
4498 case -NFS4ERR_DENIED:
4499 status = 0;
1da177e4 4500 }
70cc6487 4501 request->fl_ops->fl_release_private(request);
8d0a8a9d 4502out:
1da177e4
LT		 4503 return status;
4504}
4505
4506static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4507{
4508 struct nfs4_exception exception = { };
4509 int err;
4510
4511 do {
4512 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4513 _nfs4_proc_getlk(state, cmd, request),
4514 &exception);
4515 } while (exception.retry);
4516 return err;
4517}
4518
4519static int do_vfs_lock(struct file *file, struct file_lock *fl)
4520{
4521 int res = 0;
4522 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4523 case FL_POSIX:
4524 res = posix_lock_file_wait(file, fl);
4525 break;
4526 case FL_FLOCK:
4527 res = flock_lock_file_wait(file, fl);
4528 break;
4529 default:
4530 BUG();
4531 }
1da177e4
LT		 4532 return res;
4533}
4534
faf5f49c 4535struct nfs4_unlockdata {
911d1aaf
TM		 4536 struct nfs_locku_args arg;
4537 struct nfs_locku_res res;
faf5f49c
TM		 4538 struct nfs4_lock_state *lsp;
4539 struct nfs_open_context *ctx;
911d1aaf
TM		 4540 struct file_lock fl;
4541 const struct nfs_server *server;
26e976a8 4542 unsigned long timestamp;
faf5f49c
TM		 4543};
4544
911d1aaf
TM		 4545static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4546 struct nfs_open_context *ctx,
4547 struct nfs4_lock_state *lsp,
4548 struct nfs_seqid *seqid)
4549{
4550 struct nfs4_unlockdata *p;
4551 struct inode *inode = lsp->ls_state->inode;
4552
8535b2be 4553 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4554 if (p == NULL)
4555 return NULL;
4556 p->arg.fh = NFS_FH(inode);
4557 p->arg.fl = &p->fl;
4558 p->arg.seqid = seqid;
c1d51931 4559 p->res.seqid = seqid;
911d1aaf
TM		 4560 p->arg.stateid = &lsp->ls_stateid;
4561 p->lsp = lsp;
4562 atomic_inc(&lsp->ls_count);
4563 /* Ensure we don't close file until we're done freeing locks! */
4564 p->ctx = get_nfs_open_context(ctx);
4565 memcpy(&p->fl, fl, sizeof(p->fl));
4566 p->server = NFS_SERVER(inode);
4567 return p;
4568}
4569
06f814a3 4570static void nfs4_locku_release_calldata(void *data)
faf5f49c 4571{
963d8fe5 4572 struct nfs4_unlockdata *calldata = data;
911d1aaf 4573 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4574 nfs4_put_lock_state(calldata->lsp);
4575 put_nfs_open_context(calldata->ctx);
4576 kfree(calldata);
faf5f49c
TM		 4577}
4578
963d8fe5 4579static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4580{
963d8fe5 4581 struct nfs4_unlockdata *calldata = data;
faf5f49c 4582
14516c3a
TM		 4583 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4584 return;
faf5f49c
TM		 4585 switch (task->tk_status) {
4586 case 0:
f597c537
TM		 4587 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4588 &calldata->res.stateid);
26e976a8 4589 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4590 break;
9e33bed5
TM		 4591 case -NFS4ERR_BAD_STATEID:
4592 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4593 case -NFS4ERR_STALE_STATEID:
4594 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4595 break;
4596 default:
9e33bed5 4597 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4598 rpc_restart_call_prepare(task);
faf5f49c 4599 }
2b1bc308 4600 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4601}
4602
4ce70ada 4603static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4604{
4ce70ada 4605 struct nfs4_unlockdata *calldata = data;
faf5f49c 4606
911d1aaf 4607 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 4608 goto out_wait;
795a88c9 4609 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 4610 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 4611 goto out_no_action;
faf5f49c 4612 }
26e976a8 4613 calldata->timestamp = jiffies;
035168ab 4614 if (nfs4_setup_sequence(calldata->server,
a893693c 4615 &calldata->arg.seq_args,
2240a9e2
TM		 4616 &calldata->res.seq_res,
4617 task) != 0)
4618 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 4619 return;
4620out_no_action:
4621 task->tk_action = NULL;
4622out_wait:
4623 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4624}
4625
963d8fe5 4626static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4627 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4628 .rpc_call_done = nfs4_locku_done,
06f814a3 4629 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4630};
4631
a5d16a4d
TM		 4632static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4633 struct nfs_open_context *ctx,
4634 struct nfs4_lock_state *lsp,
4635 struct nfs_seqid *seqid)
4636{
4637 struct nfs4_unlockdata *data;
5138fde0
TM		 4638 struct rpc_message msg = {
4639 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4640 .rpc_cred = ctx->cred,
4641 };
c970aa85
TM		 4642 struct rpc_task_setup task_setup_data = {
4643 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4644 .rpc_message = &msg,
c970aa85 4645 .callback_ops = &nfs4_locku_ops,
101070ca 4646 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4647 .flags = RPC_TASK_ASYNC,
4648 };
a5d16a4d 4649
137d6aca
FF		 4650 /* Ensure this is an unlock - when canceling a lock, the
4651 * canceled lock is passed in, and it won't be an unlock.
4652 */
4653 fl->fl_type = F_UNLCK;
4654
a5d16a4d
TM		 4655 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4656 if (data == NULL) {
4657 nfs_free_seqid(seqid);
4658 return ERR_PTR(-ENOMEM);
4659 }
4660
9d12b216 4661 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4662 msg.rpc_argp = &data->arg;
4663 msg.rpc_resp = &data->res;
c970aa85
TM		 4664 task_setup_data.callback_data = data;
4665 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4666}
4667
faf5f49c
TM		 4668static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4669{
65b62a29
TM		 4670 struct inode *inode = state->inode;
4671 struct nfs4_state_owner *sp = state->owner;
4672 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 4673 struct nfs_seqid *seqid;
1da177e4 4674 struct nfs4_lock_state *lsp;
06f814a3
TM		 4675 struct rpc_task *task;
4676 int status = 0;
536ff0f8 4677 unsigned char fl_flags = request->fl_flags;
faf5f49c 4678
8d0a8a9d 4679 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4680 /* Unlock _before_ we do the RPC call */
4681 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 4682 /* Exclude nfs_delegation_claim_locks() */
4683 mutex_lock(&sp->so_delegreturn_mutex);
4684 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 4685 down_read(&nfsi->rwsem);
4686 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4687 up_read(&nfsi->rwsem);
65b62a29 4688 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 4689 goto out;
19e03c57
TM		 4690 }
4691 up_read(&nfsi->rwsem);
65b62a29 4692 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 4693 if (status != 0)
9b073574
TM		 4694 goto out;
4695 /* Is this a delegated lock? */
4696 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4697 goto out;
8d0a8a9d 4698 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4699 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4700 status = -ENOMEM;
911d1aaf 4701 if (seqid == NULL)
9b073574 4702 goto out;
cd3758e3 4703 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4704 status = PTR_ERR(task);
4705 if (IS_ERR(task))
9b073574 4706 goto out;
a5d16a4d 4707 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4708 rpc_put_task(task);
9b073574 4709out:
536ff0f8 4710 request->fl_flags = fl_flags;
1da177e4
LT		 4711 return status;
4712}
4713
a5d16a4d
TM		 4714struct nfs4_lockdata {
4715 struct nfs_lock_args arg;
4716 struct nfs_lock_res res;
4717 struct nfs4_lock_state *lsp;
4718 struct nfs_open_context *ctx;
4719 struct file_lock fl;
26e976a8 4720 unsigned long timestamp;
a5d16a4d
TM		 4721 int rpc_status;
4722 int cancelled;
66179efe 4723 struct nfs_server *server;
a5d16a4d
TM		 4724};
4725
4726static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4727 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4728 gfp_t gfp_mask)
1da177e4 4729{
a5d16a4d
TM		 4730 struct nfs4_lockdata *p;
4731 struct inode *inode = lsp->ls_state->inode;
1da177e4 4732 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4733
8535b2be 4734 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4735 if (p == NULL)
4736 return NULL;
4737
4738 p->arg.fh = NFS_FH(inode);
4739 p->arg.fl = &p->fl;
8535b2be 4740 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4741 if (p->arg.open_seqid == NULL)
4742 goto out_free;
8535b2be 4743 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4744 if (p->arg.lock_seqid == NULL)
2f74c0a0 4745 goto out_free_seqid;
a5d16a4d 4746 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4747 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4748 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4749 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4750 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4751 p->lsp = lsp;
66179efe 4752 p->server = server;
a5d16a4d
TM		 4753 atomic_inc(&lsp->ls_count);
4754 p->ctx = get_nfs_open_context(ctx);
4755 memcpy(&p->fl, fl, sizeof(p->fl));
4756 return p;
2f74c0a0
TM		 4757out_free_seqid:
4758 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4759out_free:
4760 kfree(p);
4761 return NULL;
4762}
4763
4764static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4765{
4766 struct nfs4_lockdata *data = calldata;
4767 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4768
3110ff80 4769 dprintk("%s: begin!\n", __func__);
2f74c0a0 4770 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 4771 goto out_wait;
a5d16a4d
TM		 4772 /* Do we need to do an open_to_lock_owner? */
4773 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4774 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4775 goto out_release_lock_seqid;
8fe72bac 4776 }
a5d16a4d
TM		 4777 data->arg.open_stateid = &state->stateid;
4778 data->arg.new_lock_owner = 1;
c1d51931 4779 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4780 } else
4781 data->arg.new_lock_owner = 0;
5d422301
TM		 4782 if (!nfs4_valid_open_stateid(state)) {
4783 data->rpc_status = -EBADF;
4784 task->tk_action = NULL;
4785 goto out_release_open_seqid;
4786 }
26e976a8 4787 data->timestamp = jiffies;
035168ab
TM		 4788 if (nfs4_setup_sequence(data->server,
4789 &data->arg.seq_args,
2240a9e2 4790 &data->res.seq_res,
d9afbd1b 4791 task) == 0)
66179efe 4792 return;
5d422301 4793out_release_open_seqid:
2240a9e2
TM		 4794 nfs_release_seqid(data->arg.open_seqid);
4795out_release_lock_seqid:
4796 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 4797out_wait:
4798 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 4799 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4800}
4801
a5d16a4d
TM		 4802static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4803{
4804 struct nfs4_lockdata *data = calldata;
4805
3110ff80 4806 dprintk("%s: begin!\n", __func__);
a5d16a4d 4807
14516c3a
TM		 4808 if (!nfs4_sequence_done(task, &data->res.seq_res))
4809 return;
66179efe 4810
a5d16a4d 4811 data->rpc_status = task->tk_status;
a5d16a4d 4812 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4813 if (data->rpc_status == 0)
4814 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4815 else
4816 goto out;
4817 }
4818 if (data->rpc_status == 0) {
f597c537 4819 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4820 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4821 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4822 }
a5d16a4d 4823out:
3110ff80 4824 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4825}
4826
4827static void nfs4_lock_release(void *calldata)
4828{
4829 struct nfs4_lockdata *data = calldata;
4830
3110ff80 4831 dprintk("%s: begin!\n", __func__);
2f74c0a0 4832 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4833 if (data->cancelled != 0) {
4834 struct rpc_task *task;
4835 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4836 data->arg.lock_seqid);
4837 if (!IS_ERR(task))
bf294b41 4838 rpc_put_task_async(task);
3110ff80 4839 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4840 } else
4841 nfs_free_seqid(data->arg.lock_seqid);
4842 nfs4_put_lock_state(data->lsp);
4843 put_nfs_open_context(data->ctx);
4844 kfree(data);
3110ff80 4845 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4846}
4847
4848static const struct rpc_call_ops nfs4_lock_ops = {
4849 .rpc_call_prepare = nfs4_lock_prepare,
4850 .rpc_call_done = nfs4_lock_done,
4851 .rpc_release = nfs4_lock_release,
4852};
4853
2bee72a6
TM		 4854static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4855{
2bee72a6
TM		 4856 switch (error) {
4857 case -NFS4ERR_ADMIN_REVOKED:
4858 case -NFS4ERR_BAD_STATEID:
ecac799a 4859 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4860 if (new_lock_owner != 0 ||
795a88c9 4861 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4862 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4863 break;
4864 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4865 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4866 case -NFS4ERR_EXPIRED:
4867 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4868 };
4869}
4870
afe6c27c 4871static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4872{
4873 struct nfs4_lockdata *data;
4874 struct rpc_task *task;
5138fde0
TM		 4875 struct rpc_message msg = {
4876 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4877 .rpc_cred = state->owner->so_cred,
4878 };
c970aa85
TM		 4879 struct rpc_task_setup task_setup_data = {
4880 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4881 .rpc_message = &msg,
c970aa85 4882 .callback_ops = &nfs4_lock_ops,
101070ca 4883 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4884 .flags = RPC_TASK_ASYNC,
4885 };
a5d16a4d
TM		 4886 int ret;
4887
3110ff80 4888 dprintk("%s: begin!\n", __func__);
cd3758e3 4889 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4890 fl->fl_u.nfs4_fl.owner,
4891 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4892 if (data == NULL)
4893 return -ENOMEM;
4894 if (IS_SETLKW(cmd))
4895 data->arg.block = 1;
9d12b216 4896 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4897 msg.rpc_argp = &data->arg;
4898 msg.rpc_resp = &data->res;
c970aa85 4899 task_setup_data.callback_data = data;
8fe72bac
TM		 4900 if (recovery_type > NFS_LOCK_NEW) {
4901 if (recovery_type == NFS_LOCK_RECLAIM)
4902 data->arg.reclaim = NFS_LOCK_RECLAIM;
4903 nfs4_set_sequence_privileged(&data->arg.seq_args);
4904 }
c970aa85 4905 task = rpc_run_task(&task_setup_data);
7a1218a2 4906 if (IS_ERR(task))
a5d16a4d 4907 return PTR_ERR(task);
a5d16a4d
TM		 4908 ret = nfs4_wait_for_completion_rpc_task(task);
4909 if (ret == 0) {
4910 ret = data->rpc_status;
2bee72a6
TM		 4911 if (ret)
4912 nfs4_handle_setlk_error(data->server, data->lsp,
4913 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4914 } else
4915 data->cancelled = 1;
e6b3c4db 4916 rpc_put_task(task);
3110ff80 4917 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4918 return ret;
1da177e4
LT		 4919}
4920
4921static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4922{
202b50dc 4923 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4924 struct nfs4_exception exception = {
4925 .inode = state->inode,
4926 };
202b50dc
TM		 4927 int err;
4928
4929 do {
42a2d13e
TM		 4930 /* Cache the lock if possible... */
4931 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4932 return 0;
afe6c27c 4933 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4934 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4935 break;
4936 nfs4_handle_exception(server, err, &exception);
4937 } while (exception.retry);
4938 return err;
1da177e4
LT		 4939}
4940
4941static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4942{
202b50dc 4943 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4944 struct nfs4_exception exception = {
4945 .inode = state->inode,
4946 };
202b50dc
TM		 4947 int err;
4948
6bfc93ef
TM		 4949 err = nfs4_set_lock_state(state, request);
4950 if (err != 0)
4951 return err;
202b50dc 4952 do {
42a2d13e
TM		 4953 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4954 return 0;
afe6c27c 4955 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4956 switch (err) {
4957 default:
4958 goto out;
4959 case -NFS4ERR_GRACE:
4960 case -NFS4ERR_DELAY:
4961 nfs4_handle_exception(server, err, &exception);
4962 err = 0;
4963 }
202b50dc 4964 } while (exception.retry);
a9ed2e25 4965out:
202b50dc 4966 return err;
1da177e4
LT		 4967}
4968
f062eb6c 4969#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 4970/**
4971 * nfs41_check_expired_locks - possibly free a lock stateid
4972 *
4973 * @state: NFSv4 state for an inode
4974 *
4975 * Returns NFS_OK if recovery for this stateid is now finished.
4976 * Otherwise a negative NFS4ERR value is returned.
4977 */
b01dd1d8 4978static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4979{
eb64cf96 4980 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 4981 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4982 struct nfs_server *server = NFS_SERVER(state->inode);
4983
b01dd1d8 4984 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 4985 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 4986 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4987 if (status != NFS_OK) {
3e60ffdd
CL		 4988 /* Free the stateid unless the server
4989 * informs us the stateid is unrecognized. */
89af2739
CL		 4990 if (status != -NFS4ERR_BAD_STATEID)
4991 nfs41_free_stateid(server,
4992 &lsp->ls_stateid);
795a88c9 4993 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 4994 ret = status;
4995 }
4996 }
4997 };
4998
4999 return ret;
5000}
5001
5002static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5003{
5004 int status = NFS_OK;
5005
5006 if (test_bit(LK_STATE_IN_USE, &state->flags))
5007 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5008 if (status != NFS_OK)
5009 status = nfs4_lock_expired(state, request);
5010 return status;
f062eb6c
BS		 5011}
5012#endif
5013
1da177e4
LT		 5014static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5015{
9a99af49 5016 struct nfs4_state_owner *sp = state->owner;
19e03c57 5017 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5018 unsigned char fl_flags = request->fl_flags;
9a99af49 5019 unsigned int seq;
8e469ebd 5020 int status = -ENOLCK;
1da177e4 5021
8e469ebd
TM		 5022 if ((fl_flags & FL_POSIX) &&
5023 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5024 goto out;
6bfc93ef 5025 /* Is this a delegated open? */
6bfc93ef
TM		 5026 status = nfs4_set_lock_state(state, request);
5027 if (status != 0)
5028 goto out;
01c3b861
TM		 5029 request->fl_flags |= FL_ACCESS;
5030 status = do_vfs_lock(request->fl_file, request);
5031 if (status < 0)
5032 goto out;
19e03c57 5033 down_read(&nfsi->rwsem);
01c3b861 5034 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5035 /* Yes: cache locks! */
01c3b861 5036 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5037 request->fl_flags = fl_flags & ~FL_SLEEP;
5038 status = do_vfs_lock(request->fl_file, request);
5039 goto out_unlock;
01c3b861 5040 }
9a99af49
TM		 5041 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5042 up_read(&nfsi->rwsem);
afe6c27c 5043 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5044 if (status != 0)
9a99af49
TM		 5045 goto out;
5046 down_read(&nfsi->rwsem);
5047 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5048 status = -NFS4ERR_DELAY;
01c3b861 5049 goto out_unlock;
9a99af49 5050 }
6bfc93ef 5051 /* Note: we always want to sleep here! */
01c3b861 5052 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5053 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5054 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5055 "manager!\n", __func__);
01c3b861 5056out_unlock:
19e03c57 5057 up_read(&nfsi->rwsem);
01c3b861
TM		 5058out:
5059 request->fl_flags = fl_flags;
1da177e4
LT		 5060 return status;
5061}
5062
5063static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5064{
a1d0b5ee
TM		 5065 struct nfs4_exception exception = {
5066 .state = state,
05ffe24f 5067 .inode = state->inode,
a1d0b5ee 5068 };
1da177e4
LT		 5069 int err;
5070
5071 do {
965b5d67
TM		 5072 err = _nfs4_proc_setlk(state, cmd, request);
5073 if (err == -NFS4ERR_DENIED)
5074 err = -EAGAIN;
1da177e4 5075 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5076 err, &exception);
1da177e4
LT		 5077 } while (exception.retry);
5078 return err;
5079}
5080
5081static int
5082nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5083{
5084 struct nfs_open_context *ctx;
5085 struct nfs4_state *state;
5086 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5087 int status;
5088
5089 /* verify open state */
cd3758e3 5090 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5091 state = ctx->state;
5092
5093 if (request->fl_start < 0 || request->fl_end < 0)
5094 return -EINVAL;
5095
d953126a
TM		 5096 if (IS_GETLK(cmd)) {
5097 if (state != NULL)
5098 return nfs4_proc_getlk(state, F_GETLK, request);
5099 return 0;
5100 }
1da177e4
LT		 5101
5102 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5103 return -EINVAL;
5104
d953126a
TM		 5105 if (request->fl_type == F_UNLCK) {
5106 if (state != NULL)
5107 return nfs4_proc_unlck(state, cmd, request);
5108 return 0;
5109 }
1da177e4 5110
d953126a
TM		 5111 if (state == NULL)
5112 return -ENOLCK;
55725513
TM		 5113 /*
5114 * Don't rely on the VFS having checked the file open mode,
5115 * since it won't do this for flock() locks.
5116 */
f44106e2 5117 switch (request->fl_type) {
55725513
TM		 5118 case F_RDLCK:
5119 if (!(filp->f_mode & FMODE_READ))
5120 return -EBADF;
5121 break;
5122 case F_WRLCK:
5123 if (!(filp->f_mode & FMODE_WRITE))
5124 return -EBADF;
5125 }
5126
1da177e4
LT		 5127 do {
5128 status = nfs4_proc_setlk(state, cmd, request);
5129 if ((status != -EAGAIN) || IS_SETLK(cmd))
5130 break;
5131 timeout = nfs4_set_lock_task_retry(timeout);
5132 status = -ERESTARTSYS;
5133 if (signalled())
5134 break;
5135 } while(status < 0);
1da177e4
LT		 5136 return status;
5137}
5138
db4f2e63 5139int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5140{
5141 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5142 int err;
5143
5144 err = nfs4_set_lock_state(state, fl);
5145 if (err != 0)
db4f2e63 5146 return err;
4a706fa0 5147 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5148 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5149}
6b3b5496 5150
cf470c3e
TM		 5151struct nfs_release_lockowner_data {
5152 struct nfs4_lock_state *lsp;
5ae67c4f 5153 struct nfs_server *server;
cf470c3e
TM		 5154 struct nfs_release_lockowner_args args;
5155};
5156
d3c7b7cc
TM		 5157static void nfs4_release_lockowner_release(void *calldata)
5158{
cf470c3e 5159 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5160 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5161 kfree(calldata);
5162}
5163
17280175 5164static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5165 .rpc_release = nfs4_release_lockowner_release,
5166};
5167
cf470c3e 5168int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 5169{
5170 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 5171 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5172 struct rpc_message msg = {
5173 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5174 };
5175
5176 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5177 return -EINVAL;
5178 data = kmalloc(sizeof(*data), GFP_NOFS);
5179 if (!data)
5180 return -ENOMEM;
5181 data->lsp = lsp;
5ae67c4f 5182 data->server = server;
cf470c3e
TM		 5183 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5184 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5185 data->args.lock_owner.s_dev = server->s_dev;
5186 msg.rpc_argp = &data->args;
5187 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5188 return 0;
d3c7b7cc
TM		 5189}
5190
aa1870af
BF		 5191#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5192
64c2ce8b
AK		 5193static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5194 const void *buf, size_t buflen,
5195 int flags, int type)
6b3b5496 5196{
64c2ce8b
AK		 5197 if (strcmp(key, "") != 0)
5198 return -EINVAL;
4b580ee3 5199
64c2ce8b 5200 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5201}
5202
64c2ce8b
AK		 5203static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5204 void *buf, size_t buflen, int type)
6b3b5496 5205{
64c2ce8b
AK		 5206 if (strcmp(key, "") != 0)
5207 return -EINVAL;
aa1870af 5208
64c2ce8b 5209 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5210}
5211
64c2ce8b
AK		 5212static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5213 size_t list_len, const char *name,
5214 size_t name_len, int type)
6b3b5496 5215{
64c2ce8b 5216 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5217
096455a2
BF		 5218 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5219 return 0;
64c2ce8b
AK		 5220
5221 if (list && len <= list_len)
5222 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5223 return len;
6b3b5496
BF		 5224}
5225
533eb461
AA		 5226/*
5227 * nfs_fhget will use either the mounted_on_fileid or the fileid
5228 */
69aaaae1
TM		 5229static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5230{
533eb461
AA		 5231 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5232 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5233 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5234 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5235 return;
5236
5237 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5238 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5239 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5240 fattr->nlink = 2;
5241}
5242
f05d147f
BS		 5243static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5244 const struct qstr *name,
5245 struct nfs4_fs_locations *fs_locations,
5246 struct page *page)
683b57b4
TM		 5247{
5248 struct nfs_server *server = NFS_SERVER(dir);
5249 u32 bitmask[2] = {
361e624f 5250 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5251 };
5252 struct nfs4_fs_locations_arg args = {
5253 .dir_fh = NFS_FH(dir),
c228fd3a 5254 .name = name,
683b57b4
TM		 5255 .page = page,
5256 .bitmask = bitmask,
5257 };
22958463
BH		 5258 struct nfs4_fs_locations_res res = {
5259 .fs_locations = fs_locations,
5260 };
683b57b4
TM		 5261 struct rpc_message msg = {
5262 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5263 .rpc_argp = &args,
22958463 5264 .rpc_resp = &res,
683b57b4
TM		 5265 };
5266 int status;
5267
3110ff80 5268 dprintk("%s: start\n", __func__);
533eb461
AA		 5269
5270 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5271 * is not supported */
5272 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5273 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5274 else
5275 bitmask[0] |= FATTR4_WORD0_FILEID;
5276
c228fd3a 5277 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5278 fs_locations->server = server;
830b8e33 5279 fs_locations->nlocations = 0;
f05d147f 5280 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5281 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5282 return status;
5283}
5284
f05d147f
BS		 5285int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5286 const struct qstr *name,
5287 struct nfs4_fs_locations *fs_locations,
5288 struct page *page)
db0a9593
BS		 5289{
5290 struct nfs4_exception exception = { };
5291 int err;
5292 do {
5293 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5294 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5295 &exception);
5296 } while (exception.retry);
5297 return err;
5298}
5299
5a5ea0d4
BS		 5300static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5301{
5302 int status;
5303 struct nfs4_secinfo_arg args = {
5304 .dir_fh = NFS_FH(dir),
5305 .name = name,
5306 };
5307 struct nfs4_secinfo_res res = {
5308 .flavors = flavors,
5309 };
5310 struct rpc_message msg = {
5311 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5312 .rpc_argp = &args,
5313 .rpc_resp = &res,
5314 };
5315
5316 dprintk("NFS call secinfo %s\n", name->name);
5317 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5318 dprintk("NFS reply secinfo: %d\n", status);
5319 return status;
5320}
5321
72de53ec
BS		 5322int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5323 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5324{
5325 struct nfs4_exception exception = { };
5326 int err;
5327 do {
5328 err = nfs4_handle_exception(NFS_SERVER(dir),
5329 _nfs4_proc_secinfo(dir, name, flavors),
5330 &exception);
5331 } while (exception.retry);
5332 return err;
5333}
5334
557134a3 5335#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5336/*
5337 * Check the exchange flags returned by the server for invalid flags, having
5338 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5339 * DS flags set.
5340 */
5341static int nfs4_check_cl_exchange_flags(u32 flags)
5342{
5343 if (flags & ~EXCHGID4_FLAG_MASK_R)
5344 goto out_inval;
5345 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5346 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5347 goto out_inval;
5348 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5349 goto out_inval;
5350 return NFS_OK;
5351out_inval:
5352 return -NFS4ERR_INVAL;
5353}
5354
78fe0f41 5355static bool
79d4e1f0
CL		 5356nfs41_same_server_scope(struct nfs41_server_scope *a,
5357 struct nfs41_server_scope *b)
78fe0f41
WAA		 5358{
5359 if (a->server_scope_sz == b->server_scope_sz &&
5360 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5361 return true;
5362
5363 return false;
5364}
5365
7c44f1ae
WAA		 5366/*
5367 * nfs4_proc_bind_conn_to_session()
5368 *
5369 * The 4.1 client currently uses the same TCP connection for the
5370 * fore and backchannel.
5371 */
2cf047c9 5372int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5373{
5374 int status;
5375 struct nfs41_bind_conn_to_session_res res;
5376 struct rpc_message msg = {
5377 .rpc_proc =
5378 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5379 .rpc_argp = clp,
5380 .rpc_resp = &res,
2cf047c9 5381 .rpc_cred = cred,
7c44f1ae
WAA		 5382 };
5383
5384 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5385
5386 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5387 if (unlikely(res.session == NULL)) {
5388 status = -ENOMEM;
5389 goto out;
5390 }
5391
5392 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5393 if (status == 0) {
5394 if (memcmp(res.session->sess_id.data,
5395 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5396 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5397 status = -EIO;
5398 goto out_session;
5399 }
5400 if (res.dir != NFS4_CDFS4_BOTH) {
5401 dprintk("NFS: %s: Unexpected direction from server\n",
5402 __func__);
5403 status = -EIO;
5404 goto out_session;
5405 }
5406 if (res.use_conn_in_rdma_mode) {
5407 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5408 __func__);
5409 status = -EIO;
5410 goto out_session;
5411 }
5412 }
5413out_session:
5414 kfree(res.session);
5415out:
5416 dprintk("<-- %s status= %d\n", __func__, status);
5417 return status;
5418}
5419
99fe60d0
BH		 5420/*
5421 * nfs4_proc_exchange_id()
5422 *
6bbb4ae8
CL		 5423 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5424 *
99fe60d0
BH		 5425 * Since the clientid has expired, all compounds using sessions
5426 * associated with the stale clientid will be returning
5427 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5428 * be in some phase of session reset.
5429 */
4d643d1d 5430int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5431{
5432 nfs4_verifier verifier;
5433 struct nfs41_exchange_id_args args = {
cd93710e 5434 .verifier = &verifier,
99fe60d0 5435 .client = clp,
357f54d6 5436 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5437 };
5438 struct nfs41_exchange_id_res res = {
32b01310 5439 0
99fe60d0
BH		 5440 };
5441 int status;
5442 struct rpc_message msg = {
5443 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5444 .rpc_argp = &args,
5445 .rpc_resp = &res,
5446 .rpc_cred = cred,
5447 };
99fe60d0 5448
f092075d 5449 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5450 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5451 sizeof(args.id));
6bbb4ae8
CL		 5452 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5453 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5454 args.id_len, args.id);
99fe60d0 5455
acdeb69d 5456 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5457 GFP_NOFS);
acdeb69d 5458 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5459 status = -ENOMEM;
5460 goto out;
5461 }
78fe0f41 5462
79d4e1f0 5463 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5464 GFP_NOFS);
177313f1 5465 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5466 status = -ENOMEM;
acdeb69d 5467 goto out_server_owner;
abe9a6d5 5468 }
78fe0f41 5469
bbafffd2 5470 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5471 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5472 status = -ENOMEM;
5473 goto out_server_scope;
5474 }
5475
1bd714f2 5476 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5477 if (status == 0)
32b01310 5478 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5479
acdeb69d 5480 if (status == 0) {
32b01310
TM		 5481 clp->cl_clientid = res.clientid;
5482 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5483 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5484 clp->cl_seqid = res.seqid;
5485
acdeb69d
CL		 5486 kfree(clp->cl_serverowner);
5487 clp->cl_serverowner = res.server_owner;
5488 res.server_owner = NULL;
78fe0f41 5489
7d2ed9ac 5490 /* use the most recent implementation id */
59155546
CL		 5491 kfree(clp->cl_implid);
5492 clp->cl_implid = res.impl_id;
7d2ed9ac 5493
177313f1 5494 if (clp->cl_serverscope != NULL &&
79d4e1f0 5495 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5496 res.server_scope)) {
5497 dprintk("%s: server_scope mismatch detected\n",
5498 __func__);
5499 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5500 kfree(clp->cl_serverscope);
5501 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5502 }
5503
177313f1 5504 if (clp->cl_serverscope == NULL) {
79d4e1f0 5505 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5506 goto out;
5507 }
32b01310
TM		 5508 } else
5509 kfree(res.impl_id);
7d2ed9ac 5510
acdeb69d
CL		 5511out_server_owner:
5512 kfree(res.server_owner);
7d2ed9ac 5513out_server_scope:
abe9a6d5
WAA		 5514 kfree(res.server_scope);
5515out:
177313f1 5516 if (clp->cl_implid != NULL)
6bbb4ae8 5517 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5518 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5519 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5520 clp->cl_implid->date.seconds,
5521 clp->cl_implid->date.nseconds);
6bbb4ae8 5522 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5523 return status;
5524}
5525
66245539
TM		 5526static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5527 struct rpc_cred *cred)
5528{
5529 struct rpc_message msg = {
5530 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5531 .rpc_argp = clp,
5532 .rpc_cred = cred,
5533 };
5534 int status;
5535
5536 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5537 if (status)
02c67525 5538 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5539 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5540 return status;
5541}
5542
5543static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5544 struct rpc_cred *cred)
5545{
5546 unsigned int loop;
5547 int ret;
5548
5549 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5550 ret = _nfs4_proc_destroy_clientid(clp, cred);
5551 switch (ret) {
5552 case -NFS4ERR_DELAY:
5553 case -NFS4ERR_CLIENTID_BUSY:
5554 ssleep(1);
5555 break;
5556 default:
5557 return ret;
5558 }
5559 }
5560 return 0;
5561}
5562
5563int nfs4_destroy_clientid(struct nfs_client *clp)
5564{
5565 struct rpc_cred *cred;
5566 int ret = 0;
5567
5568 if (clp->cl_mvops->minor_version < 1)
5569 goto out;
5570 if (clp->cl_exchange_flags == 0)
5571 goto out;
05f4c350
CL		 5572 if (clp->cl_preserve_clid)
5573 goto out;
66245539
TM		 5574 cred = nfs4_get_exchange_id_cred(clp);
5575 ret = nfs4_proc_destroy_clientid(clp, cred);
5576 if (cred)
5577 put_rpccred(cred);
5578 switch (ret) {
5579 case 0:
5580 case -NFS4ERR_STALE_CLIENTID:
5581 clp->cl_exchange_flags = 0;
5582 }
5583out:
5584 return ret;
5585}
5586
2050f0cc
AA		 5587struct nfs4_get_lease_time_data {
5588 struct nfs4_get_lease_time_args *args;
5589 struct nfs4_get_lease_time_res *res;
5590 struct nfs_client *clp;
5591};
5592
5593static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5594 void *calldata)
5595{
2050f0cc
AA		 5596 struct nfs4_get_lease_time_data *data =
5597 (struct nfs4_get_lease_time_data *)calldata;
5598
5599 dprintk("--> %s\n", __func__);
5600 /* just setup sequence, do not trigger session recovery
5601 since we're invoked within one */
d9afbd1b
TM		 5602 nfs41_setup_sequence(data->clp->cl_session,
5603 &data->args->la_seq_args,
5604 &data->res->lr_seq_res,
5605 task);
2050f0cc
AA		 5606 dprintk("<-- %s\n", __func__);
5607}
5608
5609/*
5610 * Called from nfs4_state_manager thread for session setup, so don't recover
5611 * from sequence operation or clientid errors.
5612 */
5613static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5614{
5615 struct nfs4_get_lease_time_data *data =
5616 (struct nfs4_get_lease_time_data *)calldata;
5617
5618 dprintk("--> %s\n", __func__);
14516c3a
TM		 5619 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5620 return;
2050f0cc
AA		 5621 switch (task->tk_status) {
5622 case -NFS4ERR_DELAY:
5623 case -NFS4ERR_GRACE:
5624 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5625 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5626 task->tk_status = 0;
a8a4ae3a
AA		 5627 /* fall through */
5628 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5629 rpc_restart_call_prepare(task);
2050f0cc
AA		 5630 return;
5631 }
2050f0cc
AA		 5632 dprintk("<-- %s\n", __func__);
5633}
5634
17280175 5635static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5636 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5637 .rpc_call_done = nfs4_get_lease_time_done,
5638};
5639
5640int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5641{
5642 struct rpc_task *task;
5643 struct nfs4_get_lease_time_args args;
5644 struct nfs4_get_lease_time_res res = {
5645 .lr_fsinfo = fsinfo,
5646 };
5647 struct nfs4_get_lease_time_data data = {
5648 .args = &args,
5649 .res = &res,
5650 .clp = clp,
5651 };
5652 struct rpc_message msg = {
5653 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5654 .rpc_argp = &args,
5655 .rpc_resp = &res,
5656 };
5657 struct rpc_task_setup task_setup = {
5658 .rpc_client = clp->cl_rpcclient,
5659 .rpc_message = &msg,
5660 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5661 .callback_data = &data,
5662 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5663 };
5664 int status;
5665
9d12b216 5666 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5667 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5668 dprintk("--> %s\n", __func__);
5669 task = rpc_run_task(&task_setup);
5670
5671 if (IS_ERR(task))
5672 status = PTR_ERR(task);
5673 else {
5674 status = task->tk_status;
5675 rpc_put_task(task);
5676 }
5677 dprintk("<-- %s return %d\n", __func__, status);
5678
5679 return status;
5680}
5681
fc931582
AA		 5682/*
5683 * Initialize the values to be used by the client in CREATE_SESSION
5684 * If nfs4_init_session set the fore channel request and response sizes,
5685 * use them.
5686 *
5687 * Set the back channel max_resp_sz_cached to zero to force the client to
5688 * always set csa_cachethis to FALSE because the current implementation
5689 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5690 */
5691static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5692{
5693 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5694 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5695 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5696
5697 if (mxrqst_sz == 0)
5698 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5699 if (mxresp_sz == 0)
5700 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5701 /* Fore channel attributes */
fc931582
AA		 5702 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5703 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5704 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5705 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5706
5707 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5708 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5709 __func__,
5710 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5711 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5712
5713 /* Back channel attributes */
fc931582
AA		 5714 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5715 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5716 args->bc_attrs.max_resp_sz_cached = 0;
5717 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5718 args->bc_attrs.max_reqs = 1;
5719
5720 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5721 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5722 __func__,
5723 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5724 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5725 args->bc_attrs.max_reqs);
5726}
5727
43c2e885 5728static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5729{
43c2e885
BF		 5730 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5731 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5732
43c2e885
BF		 5733 if (rcvd->max_resp_sz > sent->max_resp_sz)
5734 return -EINVAL;
5735 /*
5736 * Our requested max_ops is the minimum we need; we're not
5737 * prepared to break up compounds into smaller pieces than that.
5738 * So, no point even trying to continue if the server won't
5739 * cooperate:
5740 */
5741 if (rcvd->max_ops < sent->max_ops)
5742 return -EINVAL;
5743 if (rcvd->max_reqs == 0)
5744 return -EINVAL;
b4b9a0c1
VG		 5745 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5746 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5747 return 0;
8d35301d
AA		 5748}
5749
43c2e885
BF		 5750static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5751{
5752 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5753 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5754
43c2e885
BF		 5755 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5756 return -EINVAL;
5757 if (rcvd->max_resp_sz < sent->max_resp_sz)
5758 return -EINVAL;
5759 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5760 return -EINVAL;
5761 /* These would render the backchannel useless: */
b4b9a0c1 5762 if (rcvd->max_ops != sent->max_ops)
43c2e885 5763 return -EINVAL;
b4b9a0c1 5764 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5765 return -EINVAL;
5766 return 0;
5767}
8d35301d 5768
8d35301d
AA		 5769static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5770 struct nfs4_session *session)
5771{
43c2e885 5772 int ret;
8d35301d 5773
43c2e885
BF		 5774 ret = nfs4_verify_fore_channel_attrs(args, session);
5775 if (ret)
5776 return ret;
5777 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5778}
5779
848f5bda
TM		 5780static int _nfs4_proc_create_session(struct nfs_client *clp,
5781 struct rpc_cred *cred)
fc931582
AA		 5782{
5783 struct nfs4_session *session = clp->cl_session;
5784 struct nfs41_create_session_args args = {
5785 .client = clp,
5786 .cb_program = NFS4_CALLBACK,
5787 };
5788 struct nfs41_create_session_res res = {
5789 .client = clp,
5790 };
5791 struct rpc_message msg = {
5792 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5793 .rpc_argp = &args,
5794 .rpc_resp = &res,
848f5bda 5795 .rpc_cred = cred,
fc931582
AA		 5796 };
5797 int status;
5798
5799 nfs4_init_channel_attrs(&args);
0f91421e 5800 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5801
1bd714f2 5802 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5803
43095d39 5804 if (!status) {
8d35301d
AA		 5805 /* Verify the session's negotiated channel_attrs values */
5806 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5807 /* Increment the clientid slot sequence id */
5808 clp->cl_seqid++;
5809 }
5810
5811 return status;
5812}
5813
5814/*
5815 * Issues a CREATE_SESSION operation to the server.
5816 * It is the responsibility of the caller to verify the session is
5817 * expired before calling this routine.
5818 */
848f5bda 5819int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5820{
5821 int status;
5822 unsigned *ptr;
fc931582
AA		 5823 struct nfs4_session *session = clp->cl_session;
5824
5825 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5826
848f5bda 5827 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5828 if (status)
5829 goto out;
5830
aacd5537
AA		 5831 /* Init or reset the session slot tables */
5832 status = nfs4_setup_session_slot_tables(session);
5833 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5834 if (status)
5835 goto out;
5836
5837 ptr = (unsigned *)&session->sess_id.data[0];
5838 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5839 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5840out:
5841 dprintk("<-- %s\n", __func__);
5842 return status;
5843}
5844
0f3e66c6
AA		 5845/*
5846 * Issue the over-the-wire RPC DESTROY_SESSION.
5847 * The caller must serialize access to this routine.
5848 */
848f5bda
TM		 5849int nfs4_proc_destroy_session(struct nfs4_session *session,
5850 struct rpc_cred *cred)
0f3e66c6 5851{
848f5bda
TM		 5852 struct rpc_message msg = {
5853 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5854 .rpc_argp = session,
5855 .rpc_cred = cred,
5856 };
0f3e66c6 5857 int status = 0;
0f3e66c6
AA		 5858
5859 dprintk("--> nfs4_proc_destroy_session\n");
5860
5861 /* session is still being setup */
5862 if (session->clp->cl_cons_state != NFS_CS_READY)
5863 return status;
5864
1bd714f2 5865 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5866
5867 if (status)
08106ac7 5868 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5869 "Session has been destroyed regardless...\n", status);
5870
5871 dprintk("<-- nfs4_proc_destroy_session\n");
5872 return status;
5873}
5874
fc01cea9
AA		 5875/*
5876 * Renew the cl_session lease.
5877 */
d5f8d3fe
TM		 5878struct nfs4_sequence_data {
5879 struct nfs_client *clp;
5880 struct nfs4_sequence_args args;
5881 struct nfs4_sequence_res res;
5882};
5883
dc96aef9
AB		 5884static void nfs41_sequence_release(void *data)
5885{
d5f8d3fe
TM		 5886 struct nfs4_sequence_data *calldata = data;
5887 struct nfs_client *clp = calldata->clp;
dc96aef9 5888
7135840f
AB		 5889 if (atomic_read(&clp->cl_count) > 1)
5890 nfs4_schedule_state_renewal(clp);
5891 nfs_put_client(clp);
d5f8d3fe 5892 kfree(calldata);
dc96aef9
AB		 5893}
5894
aa5190d0
TM		 5895static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5896{
5897 switch(task->tk_status) {
5898 case -NFS4ERR_DELAY:
aa5190d0
TM		 5899 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5900 return -EAGAIN;
5901 default:
0400a6b0 5902 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5903 }
5904 return 0;
5905}
5906
dc96aef9 5907static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5908{
d5f8d3fe
TM		 5909 struct nfs4_sequence_data *calldata = data;
5910 struct nfs_client *clp = calldata->clp;
fc01cea9 5911
14516c3a
TM		 5912 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5913 return;
fc01cea9
AA		 5914
5915 if (task->tk_status < 0) {
5916 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5917 if (atomic_read(&clp->cl_count) == 1)
5918 goto out;
fc01cea9 5919
aa5190d0
TM		 5920 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5921 rpc_restart_call_prepare(task);
fc01cea9
AA		 5922 return;
5923 }
5924 }
fc01cea9 5925 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5926out:
fc01cea9
AA		 5927 dprintk("<-- %s\n", __func__);
5928}
5929
5930static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5931{
d5f8d3fe
TM		 5932 struct nfs4_sequence_data *calldata = data;
5933 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5934 struct nfs4_sequence_args *args;
5935 struct nfs4_sequence_res *res;
5936
fc01cea9
AA		 5937 args = task->tk_msg.rpc_argp;
5938 res = task->tk_msg.rpc_resp;
5939
d9afbd1b 5940 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 5941}
5942
5943static const struct rpc_call_ops nfs41_sequence_ops = {
5944 .rpc_call_done = nfs41_sequence_call_done,
5945 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5946 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5947};
5948
8fe72bac
TM		 5949static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
5950 struct rpc_cred *cred,
5951 bool is_privileged)
fc01cea9 5952{
d5f8d3fe 5953 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5954 struct rpc_message msg = {
5955 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5956 .rpc_cred = cred,
5957 };
71ac6da9
TM		 5958 struct rpc_task_setup task_setup_data = {
5959 .rpc_client = clp->cl_rpcclient,
5960 .rpc_message = &msg,
8fe72bac 5961 .callback_ops = &nfs41_sequence_ops,
71ac6da9
TM		 5962 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5963 };
fc01cea9 5964
7135840f 5965 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5966 return ERR_PTR(-EIO);
dfb4f309 5967 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5968 if (calldata == NULL) {
7135840f 5969 nfs_put_client(clp);
71ac6da9 5970 return ERR_PTR(-ENOMEM);
fc01cea9 5971 }
9d12b216 5972 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 5973 if (is_privileged)
5974 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 5975 msg.rpc_argp = &calldata->args;
5976 msg.rpc_resp = &calldata->res;
5977 calldata->clp = clp;
71ac6da9 5978 task_setup_data.callback_data = calldata;
fc01cea9 5979
71ac6da9
TM		 5980 return rpc_run_task(&task_setup_data);
5981}
5982
2f60ea6b 5983static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 5984{
5985 struct rpc_task *task;
5986 int ret = 0;
5987
2f60ea6b
TM		 5988 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5989 return 0;
8fe72bac 5990 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 5991 if (IS_ERR(task))
5992 ret = PTR_ERR(task);
5993 else
bf294b41 5994 rpc_put_task_async(task);
71ac6da9
TM		 5995 dprintk("<-- %s status=%d\n", __func__, ret);
5996 return ret;
5997}
5998
5999static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6000{
6001 struct rpc_task *task;
6002 int ret;
6003
8fe72bac 6004 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6005 if (IS_ERR(task)) {
6006 ret = PTR_ERR(task);
6007 goto out;
6008 }
6009 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6010 if (!ret) {
6011 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6012
6013 if (task->tk_status == 0)
6014 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6015 ret = task->tk_status;
b4410c2f 6016 }
71ac6da9
TM		 6017 rpc_put_task(task);
6018out:
6019 dprintk("<-- %s status=%d\n", __func__, ret);
6020 return ret;
fc01cea9
AA		 6021}
6022
fce5c838
RL		 6023struct nfs4_reclaim_complete_data {
6024 struct nfs_client *clp;
6025 struct nfs41_reclaim_complete_args arg;
6026 struct nfs41_reclaim_complete_res res;
6027};
6028
6029static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6030{
6031 struct nfs4_reclaim_complete_data *calldata = data;
6032
d9afbd1b
TM		 6033 nfs41_setup_sequence(calldata->clp->cl_session,
6034 &calldata->arg.seq_args,
6035 &calldata->res.seq_res,
6036 task);
fce5c838
RL		 6037}
6038
aa5190d0
TM		 6039static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6040{
6041 switch(task->tk_status) {
6042 case 0:
6043 case -NFS4ERR_COMPLETE_ALREADY:
6044 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6045 break;
6046 case -NFS4ERR_DELAY:
aa5190d0 6047 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6048 /* fall through */
6049 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6050 return -EAGAIN;
6051 default:
0400a6b0 6052 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6053 }
6054 return 0;
6055}
6056
fce5c838
RL		 6057static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6058{
6059 struct nfs4_reclaim_complete_data *calldata = data;
6060 struct nfs_client *clp = calldata->clp;
6061 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6062
6063 dprintk("--> %s\n", __func__);
14516c3a
TM		 6064 if (!nfs41_sequence_done(task, res))
6065 return;
fce5c838 6066
aa5190d0
TM		 6067 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6068 rpc_restart_call_prepare(task);
6069 return;
6070 }
fce5c838
RL		 6071 dprintk("<-- %s\n", __func__);
6072}
6073
6074static void nfs4_free_reclaim_complete_data(void *data)
6075{
6076 struct nfs4_reclaim_complete_data *calldata = data;
6077
6078 kfree(calldata);
6079}
6080
6081static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6082 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6083 .rpc_call_done = nfs4_reclaim_complete_done,
6084 .rpc_release = nfs4_free_reclaim_complete_data,
6085};
6086
6087/*
6088 * Issue a global reclaim complete.
6089 */
6090static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6091{
6092 struct nfs4_reclaim_complete_data *calldata;
6093 struct rpc_task *task;
6094 struct rpc_message msg = {
6095 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6096 };
6097 struct rpc_task_setup task_setup_data = {
6098 .rpc_client = clp->cl_rpcclient,
6099 .rpc_message = &msg,
6100 .callback_ops = &nfs4_reclaim_complete_call_ops,
6101 .flags = RPC_TASK_ASYNC,
6102 };
6103 int status = -ENOMEM;
6104
6105 dprintk("--> %s\n", __func__);
8535b2be 6106 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6107 if (calldata == NULL)
6108 goto out;
6109 calldata->clp = clp;
6110 calldata->arg.one_fs = 0;
fce5c838 6111
9d12b216 6112 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6113 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6114 msg.rpc_argp = &calldata->arg;
6115 msg.rpc_resp = &calldata->res;
6116 task_setup_data.callback_data = calldata;
6117 task = rpc_run_task(&task_setup_data);
acf82b85 6118 if (IS_ERR(task)) {
fce5c838 6119 status = PTR_ERR(task);
acf82b85
DC		 6120 goto out;
6121 }
c34c32ea
AA		 6122 status = nfs4_wait_for_completion_rpc_task(task);
6123 if (status == 0)
6124 status = task->tk_status;
fce5c838 6125 rpc_put_task(task);
acf82b85 6126 return 0;
fce5c838
RL		 6127out:
6128 dprintk("<-- %s status=%d\n", __func__, status);
6129 return status;
6130}
b1f69b75
AA		 6131
6132static void
6133nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6134{
6135 struct nfs4_layoutget *lgp = calldata;
c31663d4 6136 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6137 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6138
6139 dprintk("--> %s\n", __func__);
c31663d4
FI		 6140 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6141 * right now covering the LAYOUTGET we are about to send.
6142 * However, that is not so catastrophic, and there seems
6143 * to be no way to prevent it completely.
6144 */
6ba7db34 6145 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6146 &lgp->res.seq_res, task))
b1f69b75 6147 return;
cf7d63f1
FI		 6148 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6149 NFS_I(lgp->args.inode)->layout,
6150 lgp->args.ctx->state)) {
6151 rpc_exit(task, NFS4_OK);
cf7d63f1 6152 }
b1f69b75
AA		 6153}
6154
6155static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6156{
6157 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6158 struct inode *inode = lgp->args.inode;
6159 struct nfs_server *server = NFS_SERVER(inode);
6160 struct pnfs_layout_hdr *lo;
6161 struct nfs4_state *state = NULL;
30005121 6162 unsigned long timeo, giveup;
b1f69b75
AA		 6163
6164 dprintk("--> %s\n", __func__);
6165
6ba7db34 6166 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6167 goto out;
b1f69b75
AA		 6168
6169 switch (task->tk_status) {
6170 case 0:
ee314c2a 6171 goto out;
b1f69b75
AA		 6172 case -NFS4ERR_LAYOUTTRYLATER:
6173 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6174 timeo = rpc_get_timeout(task->tk_client);
6175 giveup = lgp->args.timestamp + timeo;
6176 if (time_after(giveup, jiffies))
6177 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6178 break;
6179 case -NFS4ERR_EXPIRED:
6180 case -NFS4ERR_BAD_STATEID:
6181 spin_lock(&inode->i_lock);
6182 lo = NFS_I(inode)->layout;
6183 if (!lo || list_empty(&lo->plh_segs)) {
6184 spin_unlock(&inode->i_lock);
6185 /* If the open stateid was bad, then recover it. */
6186 state = lgp->args.ctx->state;
6187 } else {
6188 LIST_HEAD(head);
6189
6190 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6191 spin_unlock(&inode->i_lock);
6192 /* Mark the bad layout state as invalid, then
6193 * retry using the open stateid. */
6194 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6195 }
6196 }
ee314c2a
TM		 6197 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6198 rpc_restart_call_prepare(task);
6199out:
b1f69b75
AA		 6200 dprintk("<-- %s\n", __func__);
6201}
6202
8554116e
IK		 6203static size_t max_response_pages(struct nfs_server *server)
6204{
6205 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6206 return nfs_page_array_len(0, max_resp_sz);
6207}
6208
6209static void nfs4_free_pages(struct page **pages, size_t size)
6210{
6211 int i;
6212
6213 if (!pages)
6214 return;
6215
6216 for (i = 0; i < size; i++) {
6217 if (!pages[i])
6218 break;
6219 __free_page(pages[i]);
6220 }
6221 kfree(pages);
6222}
6223
6224static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6225{
6226 struct page **pages;
6227 int i;
6228
6229 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6230 if (!pages) {
6231 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6232 return NULL;
6233 }
6234
6235 for (i = 0; i < size; i++) {
6236 pages[i] = alloc_page(gfp_flags);
6237 if (!pages[i]) {
6238 dprintk("%s: failed to allocate page\n", __func__);
6239 nfs4_free_pages(pages, size);
6240 return NULL;
6241 }
6242 }
6243
6244 return pages;
6245}
6246
b1f69b75
AA		 6247static void nfs4_layoutget_release(void *calldata)
6248{
6249 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6250 struct inode *inode = lgp->args.inode;
6251 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6252 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6253
6254 dprintk("--> %s\n", __func__);
8554116e 6255 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6256 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6257 put_nfs_open_context(lgp->args.ctx);
6258 kfree(calldata);
6259 dprintk("<-- %s\n", __func__);
6260}
6261
6262static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6263 .rpc_call_prepare = nfs4_layoutget_prepare,
6264 .rpc_call_done = nfs4_layoutget_done,
6265 .rpc_release = nfs4_layoutget_release,
6266};
6267
a0b0a6e3
TM		 6268struct pnfs_layout_segment *
6269nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6270{
a47970ff
WAA		 6271 struct inode *inode = lgp->args.inode;
6272 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6273 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6274 struct rpc_task *task;
6275 struct rpc_message msg = {
6276 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6277 .rpc_argp = &lgp->args,
6278 .rpc_resp = &lgp->res,
6279 };
6280 struct rpc_task_setup task_setup_data = {
6281 .rpc_client = server->client,
6282 .rpc_message = &msg,
6283 .callback_ops = &nfs4_layoutget_call_ops,
6284 .callback_data = lgp,
6285 .flags = RPC_TASK_ASYNC,
6286 };
a0b0a6e3 6287 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6288 int status = 0;
6289
6290 dprintk("--> %s\n", __func__);
6291
8554116e
IK		 6292 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6293 if (!lgp->args.layout.pages) {
6294 nfs4_layoutget_release(lgp);
a0b0a6e3 6295 return ERR_PTR(-ENOMEM);
8554116e
IK		 6296 }
6297 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6298 lgp->args.timestamp = jiffies;
8554116e 6299
35124a09 6300 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6301 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6302 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6303
6304 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6305 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6306
b1f69b75
AA		 6307 task = rpc_run_task(&task_setup_data);
6308 if (IS_ERR(task))
a0b0a6e3 6309 return ERR_CAST(task);
b1f69b75 6310 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6311 if (status == 0)
6312 status = task->tk_status;
085b7a45
WAA		 6313 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6314 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6315 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6316 rpc_put_task(task);
6317 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6318 if (status)
6319 return ERR_PTR(status);
6320 return lseg;
b1f69b75
AA		 6321}
6322
cbe82603
BH		 6323static void
6324nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6325{
6326 struct nfs4_layoutreturn *lrp = calldata;
6327
6328 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6329 nfs41_setup_sequence(lrp->clp->cl_session,
6330 &lrp->args.seq_args,
6331 &lrp->res.seq_res,
6332 task);
cbe82603
BH		 6333}
6334
6335static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6336{
6337 struct nfs4_layoutreturn *lrp = calldata;
6338 struct nfs_server *server;
6339
6340 dprintk("--> %s\n", __func__);
6341
6ba7db34 6342 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6343 return;
6344
6345 server = NFS_SERVER(lrp->args.inode);
6346 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6347 rpc_restart_call_prepare(task);
cbe82603
BH		 6348 return;
6349 }
cbe82603
BH		 6350 dprintk("<-- %s\n", __func__);
6351}
6352
6353static void nfs4_layoutreturn_release(void *calldata)
6354{
6355 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6356 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6357
6358 dprintk("--> %s\n", __func__);
849b286f
TM		 6359 spin_lock(&lo->plh_inode->i_lock);
6360 if (lrp->res.lrs_present)
6361 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6362 lo->plh_block_lgets--;
6363 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6364 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6365 kfree(calldata);
6366 dprintk("<-- %s\n", __func__);
6367}
6368
6369static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6370 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6371 .rpc_call_done = nfs4_layoutreturn_done,
6372 .rpc_release = nfs4_layoutreturn_release,
6373};
6374
6375int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6376{
6377 struct rpc_task *task;
6378 struct rpc_message msg = {
6379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6380 .rpc_argp = &lrp->args,
6381 .rpc_resp = &lrp->res,
6382 };
6383 struct rpc_task_setup task_setup_data = {
6384 .rpc_client = lrp->clp->cl_rpcclient,
6385 .rpc_message = &msg,
6386 .callback_ops = &nfs4_layoutreturn_call_ops,
6387 .callback_data = lrp,
6388 };
6389 int status;
6390
6391 dprintk("--> %s\n", __func__);
9d12b216 6392 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6393 task = rpc_run_task(&task_setup_data);
6394 if (IS_ERR(task))
6395 return PTR_ERR(task);
6396 status = task->tk_status;
6397 dprintk("<-- %s status=%d\n", __func__, status);
6398 rpc_put_task(task);
6399 return status;
6400}
6401
7f11d8d3
AA		 6402/*
6403 * Retrieve the list of Data Server devices from the MDS.
6404 */
6405static int _nfs4_getdevicelist(struct nfs_server *server,
6406 const struct nfs_fh *fh,
6407 struct pnfs_devicelist *devlist)
6408{
6409 struct nfs4_getdevicelist_args args = {
6410 .fh = fh,
6411 .layoutclass = server->pnfs_curr_ld->id,
6412 };
6413 struct nfs4_getdevicelist_res res = {
6414 .devlist = devlist,
6415 };
6416 struct rpc_message msg = {
6417 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6418 .rpc_argp = &args,
6419 .rpc_resp = &res,
6420 };
6421 int status;
6422
6423 dprintk("--> %s\n", __func__);
6424 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6425 &res.seq_res, 0);
6426 dprintk("<-- %s status=%d\n", __func__, status);
6427 return status;
6428}
6429
6430int nfs4_proc_getdevicelist(struct nfs_server *server,
6431 const struct nfs_fh *fh,
6432 struct pnfs_devicelist *devlist)
6433{
6434 struct nfs4_exception exception = { };
6435 int err;
6436
6437 do {
6438 err = nfs4_handle_exception(server,
6439 _nfs4_getdevicelist(server, fh, devlist),
6440 &exception);
6441 } while (exception.retry);
6442
6443 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6444 err, devlist->num_devs);
6445
6446 return err;
6447}
6448EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6449
b1f69b75
AA		 6450static int
6451_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6452{
6453 struct nfs4_getdeviceinfo_args args = {
6454 .pdev = pdev,
6455 };
6456 struct nfs4_getdeviceinfo_res res = {
6457 .pdev = pdev,
6458 };
6459 struct rpc_message msg = {
6460 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6461 .rpc_argp = &args,
6462 .rpc_resp = &res,
6463 };
6464 int status;
6465
6466 dprintk("--> %s\n", __func__);
7c513058 6467 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6468 dprintk("<-- %s status=%d\n", __func__, status);
6469
6470 return status;
6471}
6472
6473int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6474{
6475 struct nfs4_exception exception = { };
6476 int err;
6477
6478 do {
6479 err = nfs4_handle_exception(server,
6480 _nfs4_proc_getdeviceinfo(server, pdev),
6481 &exception);
6482 } while (exception.retry);
6483 return err;
6484}
6485EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6486
863a3c6c
AA		 6487static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6488{
6489 struct nfs4_layoutcommit_data *data = calldata;
6490 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6491 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6492
d9afbd1b
TM		 6493 nfs41_setup_sequence(session,
6494 &data->args.seq_args,
6495 &data->res.seq_res,
6496 task);
863a3c6c
AA		 6497}
6498
6499static void
6500nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6501{
6502 struct nfs4_layoutcommit_data *data = calldata;
6503 struct nfs_server *server = NFS_SERVER(data->args.inode);
6504
6ba7db34 6505 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6506 return;
6507
6508 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6509 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6510 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6511 case -NFS4ERR_BADLAYOUT: /* no layout */
6512 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6513 task->tk_status = 0;
e59d27e0
TM		 6514 break;
6515 case 0:
863a3c6c
AA		 6516 nfs_post_op_update_inode_force_wcc(data->args.inode,
6517 data->res.fattr);
e59d27e0
TM		 6518 break;
6519 default:
6520 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6521 rpc_restart_call_prepare(task);
6522 return;
6523 }
6524 }
863a3c6c
AA		 6525}
6526
6527static void nfs4_layoutcommit_release(void *calldata)
6528{
6529 struct nfs4_layoutcommit_data *data = calldata;
6530
db29c089 6531 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 6532 put_rpccred(data->cred);
6533 kfree(data);
6534}
6535
6536static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6537 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6538 .rpc_call_done = nfs4_layoutcommit_done,
6539 .rpc_release = nfs4_layoutcommit_release,
6540};
6541
6542int
ef311537 6543nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6544{
6545 struct rpc_message msg = {
6546 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6547 .rpc_argp = &data->args,
6548 .rpc_resp = &data->res,
6549 .rpc_cred = data->cred,
6550 };
6551 struct rpc_task_setup task_setup_data = {
6552 .task = &data->task,
6553 .rpc_client = NFS_CLIENT(data->args.inode),
6554 .rpc_message = &msg,
6555 .callback_ops = &nfs4_layoutcommit_ops,
6556 .callback_data = data,
6557 .flags = RPC_TASK_ASYNC,
6558 };
6559 struct rpc_task *task;
6560 int status = 0;
6561
6562 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6563 "lbw: %llu inode %lu\n",
6564 data->task.tk_pid, sync,
6565 data->args.lastbytewritten,
6566 data->args.inode->i_ino);
6567
9d12b216 6568 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6569 task = rpc_run_task(&task_setup_data);
6570 if (IS_ERR(task))
6571 return PTR_ERR(task);
ef311537 6572 if (sync == false)
863a3c6c
AA		 6573 goto out;
6574 status = nfs4_wait_for_completion_rpc_task(task);
6575 if (status != 0)
6576 goto out;
6577 status = task->tk_status;
6578out:
6579 dprintk("%s: status %d\n", __func__, status);
6580 rpc_put_task(task);
6581 return status;
6582}
fca78d6d
BS		 6583
6584static int
6585_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6586 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6587{
6588 struct nfs41_secinfo_no_name_args args = {
6589 .style = SECINFO_STYLE_CURRENT_FH,
6590 };
6591 struct nfs4_secinfo_res res = {
6592 .flavors = flavors,
6593 };
6594 struct rpc_message msg = {
6595 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6596 .rpc_argp = &args,
6597 .rpc_resp = &res,
6598 };
6599 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6600}
6601
6602static int
6603nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6604 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6605{
6606 struct nfs4_exception exception = { };
6607 int err;
6608 do {
6609 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6610 switch (err) {
6611 case 0:
6612 case -NFS4ERR_WRONGSEC:
6613 case -NFS4ERR_NOTSUPP:
05e9cfb4 6614 goto out;
fca78d6d
BS		 6615 default:
6616 err = nfs4_handle_exception(server, err, &exception);
6617 }
6618 } while (exception.retry);
05e9cfb4 6619out:
fca78d6d
BS		 6620 return err;
6621}
6622
6623static int
6624nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6625 struct nfs_fsinfo *info)
6626{
6627 int err;
6628 struct page *page;
6629 rpc_authflavor_t flavor;
6630 struct nfs4_secinfo_flavors *flavors;
6631
6632 page = alloc_page(GFP_KERNEL);
6633 if (!page) {
6634 err = -ENOMEM;
6635 goto out;
6636 }
6637
6638 flavors = page_address(page);
6639 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6640
6641 /*
6642 * Fall back on "guess and check" method if
6643 * the server doesn't support SECINFO_NO_NAME
6644 */
6645 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6646 err = nfs4_find_root_sec(server, fhandle, info);
6647 goto out_freepage;
6648 }
6649 if (err)
6650 goto out_freepage;
6651
6652 flavor = nfs_find_best_sec(flavors);
6653 if (err == 0)
6654 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6655
6656out_freepage:
6657 put_page(page);
6658 if (err == -EACCES)
6659 return -EPERM;
6660out:
6661 return err;
6662}
1cab0652
BS		 6663
6664static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6665{
6666 int status;
6667 struct nfs41_test_stateid_args args = {
1cab0652 6668 .stateid = stateid,
7d974794
BS		 6669 };
6670 struct nfs41_test_stateid_res res;
6671 struct rpc_message msg = {
6672 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6673 .rpc_argp = &args,
6674 .rpc_resp = &res,
6675 };
1cab0652 6676
38527b15 6677 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6678 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6679 nfs4_set_sequence_privileged(&args.seq_args);
6680 status = nfs4_call_sync_sequence(server->client, server, &msg,
6681 &args.seq_args, &res.seq_res);
38527b15
CL		 6682 if (status != NFS_OK) {
6683 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6684 return status;
38527b15
CL		 6685 }
6686 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6687 return -res.status;
7d974794
BS		 6688}
6689
38527b15
CL		 6690/**
6691 * nfs41_test_stateid - perform a TEST_STATEID operation
6692 *
6693 * @server: server / transport on which to perform the operation
6694 * @stateid: state ID to test
6695 *
6696 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6697 * Otherwise a negative NFS4ERR value is returned if the operation
6698 * failed or the state ID is not currently valid.
6699 */
1cab0652 6700static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6701{
6702 struct nfs4_exception exception = { };
6703 int err;
6704 do {
377e507d
CL		 6705 err = _nfs41_test_stateid(server, stateid);
6706 if (err != -NFS4ERR_DELAY)
6707 break;
6708 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6709 } while (exception.retry);
6710 return err;
6711}
9aeda35f 6712
1cab0652 6713static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6714{
9aeda35f 6715 struct nfs41_free_stateid_args args = {
1cab0652 6716 .stateid = stateid,
9aeda35f
BS		 6717 };
6718 struct nfs41_free_stateid_res res;
6719 struct rpc_message msg = {
6720 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6721 .rpc_argp = &args,
6722 .rpc_resp = &res,
6723 };
38527b15 6724 int status;
9aeda35f 6725
38527b15 6726 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6727 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 6728 nfs4_set_sequence_privileged(&args.seq_args);
38527b15 6729 status = nfs4_call_sync_sequence(server->client, server, &msg,
8fe72bac 6730 &args.seq_args, &res.seq_res);
38527b15
CL		 6731 dprintk("NFS reply free_stateid: %d\n", status);
6732 return status;
9aeda35f
BS		 6733}
6734
38527b15
CL		 6735/**
6736 * nfs41_free_stateid - perform a FREE_STATEID operation
6737 *
6738 * @server: server / transport on which to perform the operation
6739 * @stateid: state ID to release
6740 *
6741 * Returns NFS_OK if the server freed "stateid". Otherwise a
6742 * negative NFS4ERR value is returned.
6743 */
1cab0652 6744static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6745{
6746 struct nfs4_exception exception = { };
6747 int err;
6748 do {
377e507d
CL		 6749 err = _nfs4_free_stateid(server, stateid);
6750 if (err != -NFS4ERR_DELAY)
6751 break;
6752 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6753 } while (exception.retry);
6754 return err;
6755}
36281caa
TM		 6756
6757static bool nfs41_match_stateid(const nfs4_stateid *s1,
6758 const nfs4_stateid *s2)
6759{
2d2f24ad 6760 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6761 return false;
6762
2d2f24ad 6763 if (s1->seqid == s2->seqid)
36281caa 6764 return true;
2d2f24ad 6765 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6766 return true;
6767
6768 return false;
6769}
6770
557134a3
AA		 6771#endif /* CONFIG_NFS_V4_1 */
6772
36281caa
TM		 6773static bool nfs4_match_stateid(const nfs4_stateid *s1,
6774 const nfs4_stateid *s2)
6775{
f597c537 6776 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6777}
6778
6779
17280175 6780static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6781 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6782 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6783 .recover_open = nfs4_open_reclaim,
6784 .recover_lock = nfs4_lock_reclaim,
591d71cb 6785 .establish_clid = nfs4_init_clientid,
90a16617 6786 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6787 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6788};
6789
591d71cb 6790#if defined(CONFIG_NFS_V4_1)
17280175 6791static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6792 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6793 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6794 .recover_open = nfs4_open_reclaim,
6795 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6796 .establish_clid = nfs41_init_clientid,
b4b82607 6797 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6798 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6799 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6800};
6801#endif /* CONFIG_NFS_V4_1 */
6802
17280175 6803static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6804 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6805 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6806 .recover_open = nfs4_open_expired,
6807 .recover_lock = nfs4_lock_expired,
6808 .establish_clid = nfs4_init_clientid,
90a16617 6809 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6810};
6811
6812#if defined(CONFIG_NFS_V4_1)
17280175 6813static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6814 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6815 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6816 .recover_open = nfs41_open_expired,
6817 .recover_lock = nfs41_lock_expired,
4d643d1d 6818 .establish_clid = nfs41_init_clientid,
b4b82607 6819 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6820};
591d71cb 6821#endif /* CONFIG_NFS_V4_1 */
1da177e4 6822
17280175 6823static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6824 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6825 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6826 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6827};
6828
6829#if defined(CONFIG_NFS_V4_1)
17280175 6830static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6831 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6832 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6833 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6834};
6835#endif
6836
97dc1359
TM		 6837static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6838 .minor_version = 0,
39c6daae
TM		 6839 .init_caps = NFS_CAP_READDIRPLUS
6840 | NFS_CAP_ATOMIC_OPEN
6841 | NFS_CAP_CHANGE_ATTR
6842 | NFS_CAP_POSIX_LOCK,
97dc1359 6843 .call_sync = _nfs4_call_sync,
36281caa 6844 .match_stateid = nfs4_match_stateid,
fca78d6d 6845 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6846 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6847 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6848 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6849};
6850
6851#if defined(CONFIG_NFS_V4_1)
6852static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6853 .minor_version = 1,
39c6daae
TM		 6854 .init_caps = NFS_CAP_READDIRPLUS
6855 | NFS_CAP_ATOMIC_OPEN
6856 | NFS_CAP_CHANGE_ATTR
3b66486c 6857 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 6858 | NFS_CAP_STATEID_NFSV41
6859 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 6860 .call_sync = nfs4_call_sync_sequence,
36281caa 6861 .match_stateid = nfs41_match_stateid,
fca78d6d 6862 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6863 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6864 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6865 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6866};
6867#endif
6868
97dc1359
TM		 6869const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6870 [0] = &nfs_v4_0_minor_ops,
6871#if defined(CONFIG_NFS_V4_1)
6872 [1] = &nfs_v4_1_minor_ops,
6873#endif
6874};
6875
73a79706
BS		 6876const struct inode_operations nfs4_dir_inode_operations = {
6877 .create = nfs_create,
6878 .lookup = nfs_lookup,
6879 .atomic_open = nfs_atomic_open,
6880 .link = nfs_link,
6881 .unlink = nfs_unlink,
6882 .symlink = nfs_symlink,
6883 .mkdir = nfs_mkdir,
6884 .rmdir = nfs_rmdir,
6885 .mknod = nfs_mknod,
6886 .rename = nfs_rename,
6887 .permission = nfs_permission,
6888 .getattr = nfs_getattr,
6889 .setattr = nfs_setattr,
6890 .getxattr = generic_getxattr,
6891 .setxattr = generic_setxattr,
6892 .listxattr = generic_listxattr,
6893 .removexattr = generic_removexattr,
6894};
6895
92e1d5be 6896static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6897 .permission = nfs_permission,
6898 .getattr = nfs_getattr,
6899 .setattr = nfs_setattr,
64c2ce8b
AK		 6900 .getxattr = generic_getxattr,
6901 .setxattr = generic_setxattr,
6902 .listxattr = generic_listxattr,
6903 .removexattr = generic_removexattr,
6b3b5496
BF		 6904};
6905
509de811 6906const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6907 .version = 4, /* protocol version */
6908 .dentry_ops = &nfs4_dentry_operations,
6909 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6910 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6911 .file_ops = &nfs4_file_operations,
1da177e4 6912 .getroot = nfs4_proc_get_root,
281cad46 6913 .submount = nfs4_submount,
ff9099f2 6914 .try_mount = nfs4_try_mount,
1da177e4
LT		 6915 .getattr = nfs4_proc_getattr,
6916 .setattr = nfs4_proc_setattr,
6917 .lookup = nfs4_proc_lookup,
6918 .access = nfs4_proc_access,
6919 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6920 .create = nfs4_proc_create,
6921 .remove = nfs4_proc_remove,
6922 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6923 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6924 .unlink_done = nfs4_proc_unlink_done,
6925 .rename = nfs4_proc_rename,
d3d4152a 6926 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6927 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6928 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6929 .link = nfs4_proc_link,
6930 .symlink = nfs4_proc_symlink,
6931 .mkdir = nfs4_proc_mkdir,
6932 .rmdir = nfs4_proc_remove,
6933 .readdir = nfs4_proc_readdir,
6934 .mknod = nfs4_proc_mknod,
6935 .statfs = nfs4_proc_statfs,
6936 .fsinfo = nfs4_proc_fsinfo,
6937 .pathconf = nfs4_proc_pathconf,
e9326dca 6938 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6939 .decode_dirent = nfs4_decode_dirent,
6940 .read_setup = nfs4_proc_read_setup,
1abb5088 6941 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 6942 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6943 .read_done = nfs4_read_done,
1da177e4 6944 .write_setup = nfs4_proc_write_setup,
57208fa7 6945 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 6946 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6947 .write_done = nfs4_write_done,
1da177e4 6948 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 6949 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 6950 .commit_done = nfs4_commit_done,
1da177e4 6951 .lock = nfs4_proc_lock,
e50a1c2e 6952 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6953 .close_context = nfs4_close_context,
2b484297 6954 .open_context = nfs4_atomic_open,
011e2a7f 6955 .have_delegation = nfs4_have_delegation,
57ec14c5 6956 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 6957 .alloc_client = nfs4_alloc_client,
45a52a02 6958 .init_client = nfs4_init_client,
cdb7eced 6959 .free_client = nfs4_free_client,
1179acc6
BS		 6960 .create_server = nfs4_create_server,
6961 .clone_server = nfs_clone_server,
1da177e4
LT		 6962};
6963
64c2ce8b
AK		 6964static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6965 .prefix = XATTR_NAME_NFSV4_ACL,
6966 .list = nfs4_xattr_list_nfs4_acl,
6967 .get = nfs4_xattr_get_nfs4_acl,
6968 .set = nfs4_xattr_set_nfs4_acl,
6969};
6970
6971const struct xattr_handler *nfs4_xattr_handlers[] = {
6972 &nfs4_xattr_nfs4_acl_handler,
6973 NULL
6974};
6975
1da177e4
LT		 6976/*
6977 * Local variables:
6978 * c-basic-offset: 8
6979 * End:
6980 */
kernel source for telekom puls (alcatel/mediatek)