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Merge branch 'bugfixes' into linux-next
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa 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:
b570a975
TM		 307 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
308 nfs_remove_bad_delegation(inode);
309 exception->retry = 1;
310 break;
311 }
9e33bed5
TM		 312 if (state == NULL)
313 break;
5d422301
TM		 314 ret = nfs4_schedule_stateid_recovery(server, state);
315 if (ret < 0)
316 break;
0400a6b0 317 goto wait_on_recovery;
0ced63d1 318 case -NFS4ERR_EXPIRED:
5d422301
TM		 319 if (state != NULL) {
320 ret = nfs4_schedule_stateid_recovery(server, state);
321 if (ret < 0)
322 break;
323 }
65de872e 324 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 325 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 326 nfs4_schedule_lease_recovery(clp);
327 goto wait_on_recovery;
03391693 328#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 329 case -NFS4ERR_BADSESSION:
330 case -NFS4ERR_BADSLOT:
331 case -NFS4ERR_BAD_HIGH_SLOT:
332 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
333 case -NFS4ERR_DEADSESSION:
334 case -NFS4ERR_SEQ_FALSE_RETRY:
335 case -NFS4ERR_SEQ_MISORDERED:
336 dprintk("%s ERROR: %d Reset session\n", __func__,
337 errorcode);
9f594791 338 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 339 goto wait_on_recovery;
03391693 340#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 341 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 342 if (exception->timeout > HZ) {
343 /* We have retried a decent amount, time to
344 * fail
345 */
346 ret = -EBUSY;
347 break;
348 }
65de872e
TM		 349 case -NFS4ERR_GRACE:
350 case -NFS4ERR_DELAY:
351 ret = nfs4_delay(server->client, &exception->timeout);
352 if (ret != 0)
353 break;
a8a4ae3a 354 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 355 case -NFS4ERR_OLD_STATEID:
356 exception->retry = 1;
b064eca2
TM		 357 break;
358 case -NFS4ERR_BADOWNER:
359 /* The following works around a Linux server bug! */
360 case -NFS4ERR_BADNAME:
361 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
362 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
363 exception->retry = 1;
364 printk(KERN_WARNING "NFS: v4 server %s "
365 "does not accept raw "
366 "uid/gids. "
367 "Reenabling the idmapper.\n",
368 server->nfs_client->cl_hostname);
369 }
65de872e
TM		 370 }
371 /* We failed to handle the error */
372 return nfs4_map_errors(ret);
0400a6b0 373wait_on_recovery:
a2c0b9e2
TM		 374 ret = nfs4_wait_clnt_recover(clp);
375 if (ret == 0)
376 exception->retry = 1;
377 return ret;
65de872e
TM		 378}
379
380
452e9352 381static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 382{
1da177e4
LT		 383 spin_lock(&clp->cl_lock);
384 if (time_before(clp->cl_last_renewal,timestamp))
385 clp->cl_last_renewal = timestamp;
386 spin_unlock(&clp->cl_lock);
387}
388
452e9352
TM		 389static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
390{
391 do_renew_lease(server->nfs_client, timestamp);
392}
393
cccef3b9
AA		 394#if defined(CONFIG_NFS_V4_1)
395
d185a334 396static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 397{
e3725ec0 398 struct nfs4_session *session;
13615871 399 struct nfs4_slot_table *tbl;
c10e4498 400 bool send_new_highest_used_slotid = false;
13615871 401
dfb4f309 402 if (!res->sr_slot) {
13615871
AA		 403 /* just wake up the next guy waiting since
404 * we may have not consumed a slot after all */
691daf3b 405 dprintk("%s: No slot\n", __func__);
35dc1d74 406 return;
13615871 407 }
e3725ec0
TM		 408 tbl = res->sr_slot->table;
409 session = tbl->session;
ea028ac9 410
35dc1d74 411 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 412 /* Be nice to the server: try to ensure that the last transmitted
413 * value for highest_user_slotid <= target_highest_slotid
414 */
415 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
416 send_new_highest_used_slotid = true;
417
b75ad4cd
TM		 418 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
419 send_new_highest_used_slotid = false;
420 goto out_unlock;
421 }
f4af6e2a 422 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 423
424 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
425 send_new_highest_used_slotid = false;
b75ad4cd 426out_unlock:
35dc1d74 427 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 428 res->sr_slot = NULL;
c10e4498
TM		 429 if (send_new_highest_used_slotid)
430 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 431}
432
14516c3a 433static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 434{
e3725ec0 435 struct nfs4_session *session;
933602e3 436 struct nfs4_slot *slot;
14516c3a 437 struct nfs_client *clp;
ac20d163 438 bool interrupted = false;
85563073 439 int ret = 1;
b0df806c 440
468f8613
BS		 441 /* don't increment the sequence number if the task wasn't sent */
442 if (!RPC_WAS_SENT(task))
b0df806c
AA		 443 goto out;
444
933602e3 445 slot = res->sr_slot;
e3725ec0 446 session = slot->table->session;
933602e3 447
ac20d163
TM		 448 if (slot->interrupted) {
449 slot->interrupted = 0;
450 interrupted = true;
451 }
452
691daf3b 453 /* Check the SEQUENCE operation status */
14516c3a
TM		 454 switch (res->sr_status) {
455 case 0:
b0df806c 456 /* Update the slot's sequence and clientid lease timer */
933602e3 457 ++slot->seq_nr;
e3725ec0 458 clp = session->clp;
8e63b6a8 459 do_renew_lease(clp, res->sr_timestamp);
0629e370 460 /* Check sequence flags */
b4410c2f
TM		 461 if (res->sr_status_flags != 0)
462 nfs4_schedule_lease_recovery(clp);
464ee9f9 463 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 464 break;
ac20d163
TM		 465 case 1:
466 /*
467 * sr_status remains 1 if an RPC level error occurred.
468 * The server may or may not have processed the sequence
469 * operation..
470 * Mark the slot as having hosted an interrupted RPC call.
471 */
472 slot->interrupted = 1;
473 goto out;
14516c3a
TM		 474 case -NFS4ERR_DELAY:
475 /* The server detected a resend of the RPC call and
476 * returned NFS4ERR_DELAY as per Section 2.10.6.2
477 * of RFC5661.
478 */
df2fabff 479 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 480 __func__,
df2fabff 481 slot->slot_nr,
933602e3 482 slot->seq_nr);
14516c3a 483 goto out_retry;
85563073
TM		 484 case -NFS4ERR_BADSLOT:
485 /*
486 * The slot id we used was probably retired. Try again
487 * using a different slot id.
488 */
e8794440
TM		 489 goto retry_nowait;
490 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 491 /*
492 * Was the last operation on this sequence interrupted?
493 * If so, retry after bumping the sequence number.
494 */
495 if (interrupted) {
496 ++slot->seq_nr;
497 goto retry_nowait;
498 }
e8794440
TM		 499 /*
500 * Could this slot have been previously retired?
501 * If so, then the server may be expecting seq_nr = 1!
502 */
8e63b6a8
TM		 503 if (slot->seq_nr != 1) {
504 slot->seq_nr = 1;
505 goto retry_nowait;
506 }
507 break;
e8794440
TM		 508 case -NFS4ERR_SEQ_FALSE_RETRY:
509 ++slot->seq_nr;
510 goto retry_nowait;
14516c3a
TM		 511 default:
512 /* Just update the slot sequence no. */
933602e3 513 ++slot->seq_nr;
b0df806c
AA		 514 }
515out:
516 /* The session may be reset by one of the error handlers. */
517 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 518 nfs41_sequence_free_slot(res);
85563073 519 return ret;
e8794440
TM		 520retry_nowait:
521 if (rpc_restart_call_prepare(task)) {
522 task->tk_status = 0;
523 ret = 0;
524 }
525 goto out;
14516c3a 526out_retry:
d05dd4e9 527 if (!rpc_restart_call(task))
14516c3a
TM		 528 goto out;
529 rpc_delay(task, NFS4_POLL_RETRY_MAX);
530 return 0;
b0df806c
AA		 531}
532
14516c3a
TM		 533static int nfs4_sequence_done(struct rpc_task *task,
534 struct nfs4_sequence_res *res)
df896455 535{
e3725ec0 536 if (res->sr_slot == NULL)
14516c3a
TM		 537 return 1;
538 return nfs41_sequence_done(task, res);
df896455
TM		 539}
540
9d12b216
TM		 541static void nfs41_init_sequence(struct nfs4_sequence_args *args,
542 struct nfs4_sequence_res *res, int cache_reply)
543{
2b2fa717 544 args->sa_slot = NULL;
9d12b216 545 args->sa_cache_this = 0;
8fe72bac 546 args->sa_privileged = 0;
9d12b216
TM		 547 if (cache_reply)
548 args->sa_cache_this = 1;
9d12b216
TM		 549 res->sr_slot = NULL;
550}
551
8fe72bac
TM		 552static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
553{
554 args->sa_privileged = 1;
555}
556
dc70d7b3 557int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 558 struct nfs4_sequence_args *args,
559 struct nfs4_sequence_res *res,
ce5039c1
AA		 560 struct rpc_task *task)
561{
fbcd4abc
AA		 562 struct nfs4_slot *slot;
563 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 564
565 dprintk("--> %s\n", __func__);
ce5039c1 566 /* slot already allocated? */
dfb4f309 567 if (res->sr_slot != NULL)
d9afbd1b 568 goto out_success;
ce5039c1 569
fbcd4abc
AA		 570 tbl = &session->fc_slot_table;
571
69d206b5
TM		 572 task->tk_timeout = 0;
573
fbcd4abc 574 spin_lock(&tbl->slot_tbl_lock);
a2118c33 575 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
8fe72bac 576 !args->sa_privileged) {
0b1c8fc4 577 /* The state manager will wait until the slot table is empty */
0b1c8fc4 578 dprintk("%s session is draining\n", __func__);
7b939a3f 579 goto out_sleep;
689cf5c1
AB		 580 }
581
2dc03b7f 582 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 583 if (IS_ERR(slot)) {
584 /* If out of memory, try again in 1/4 second */
585 if (slot == ERR_PTR(-ENOMEM))
586 task->tk_timeout = HZ >> 2;
fbcd4abc 587 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 588 goto out_sleep;
fbcd4abc
AA		 589 }
590 spin_unlock(&tbl->slot_tbl_lock);
591
2b2fa717 592 args->sa_slot = slot;
fbcd4abc 593
2dc03b7f
TM		 594 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
595 slot->slot_nr, slot->seq_nr);
fbcd4abc 596
dfb4f309 597 res->sr_slot = slot;
8e63b6a8 598 res->sr_timestamp = jiffies;
2a6e26cd 599 res->sr_status_flags = 0;
fbcd4abc
AA		 600 /*
601 * sr_status is only set in decode_sequence, and so will remain
602 * set to 1 if an rpc level failure occurs.
603 */
604 res->sr_status = 1;
d9afbd1b
TM		 605out_success:
606 rpc_call_start(task);
ce5039c1 607 return 0;
7b939a3f 608out_sleep:
8fe72bac
TM		 609 /* Privileged tasks are queued with top priority */
610 if (args->sa_privileged)
1e1093c7
TM		 611 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
612 NULL, RPC_PRIORITY_PRIVILEGED);
613 else
614 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 615 spin_unlock(&tbl->slot_tbl_lock);
616 return -EAGAIN;
ce5039c1 617}
dc70d7b3 618EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 619
035168ab 620int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 621 struct nfs4_sequence_args *args,
622 struct nfs4_sequence_res *res,
ce5039c1
AA		 623 struct rpc_task *task)
624{
035168ab 625 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 626 int ret = 0;
627
d9afbd1b
TM		 628 if (session == NULL) {
629 rpc_call_start(task);
035168ab 630 goto out;
d9afbd1b 631 }
035168ab 632
df2fabff 633 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 634 __func__, session->clp, session, res->sr_slot ?
df2fabff 635 res->sr_slot->slot_nr : -1);
ce5039c1 636
9d12b216 637 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 638out:
639 dprintk("<-- %s status=%d\n", __func__, ret);
640 return ret;
641}
642
643struct nfs41_call_sync_data {
035168ab 644 const struct nfs_server *seq_server;
ce5039c1
AA		 645 struct nfs4_sequence_args *seq_args;
646 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 647};
648
649static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
650{
651 struct nfs41_call_sync_data *data = calldata;
6ba7db34 652 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 653
035168ab
TM		 654 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
655
d9afbd1b 656 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 657}
658
69ab40c4
AA		 659static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
660{
661 struct nfs41_call_sync_data *data = calldata;
662
14516c3a 663 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 664}
665
17280175 666static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 667 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 668 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 669};
670
7c513058
BS		 671static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
672 struct nfs_server *server,
ce5039c1
AA		 673 struct rpc_message *msg,
674 struct nfs4_sequence_args *args,
8fe72bac 675 struct nfs4_sequence_res *res)
ce5039c1
AA		 676{
677 int ret;
678 struct rpc_task *task;
679 struct nfs41_call_sync_data data = {
035168ab 680 .seq_server = server,
ce5039c1
AA		 681 .seq_args = args,
682 .seq_res = res,
ce5039c1
AA		 683 };
684 struct rpc_task_setup task_setup = {
7c513058 685 .rpc_client = clnt,
ce5039c1
AA		 686 .rpc_message = msg,
687 .callback_ops = &nfs41_call_sync_ops,
688 .callback_data = &data
689 };
690
ce5039c1
AA		 691 task = rpc_run_task(&task_setup);
692 if (IS_ERR(task))
693 ret = PTR_ERR(task);
694 else {
695 ret = task->tk_status;
696 rpc_put_task(task);
697 }
698 return ret;
699}
700
df896455 701#else
8fe72bac 702static
9d12b216
TM		 703void nfs41_init_sequence(struct nfs4_sequence_args *args,
704 struct nfs4_sequence_res *res, int cache_reply)
705{
706}
707
8fe72bac
TM		 708static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
709{
710}
711
712
14516c3a
TM		 713static int nfs4_sequence_done(struct rpc_task *task,
714 struct nfs4_sequence_res *res)
df896455 715{
14516c3a 716 return 1;
df896455 717}
cccef3b9
AA		 718#endif /* CONFIG_NFS_V4_1 */
719
fd0c0953 720static
7c513058
BS		 721int _nfs4_call_sync(struct rpc_clnt *clnt,
722 struct nfs_server *server,
cccef3b9
AA		 723 struct rpc_message *msg,
724 struct nfs4_sequence_args *args,
fd0c0953 725 struct nfs4_sequence_res *res)
cccef3b9 726{
7c513058 727 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 728}
729
fd0c0953 730static
7c513058
BS		 731int nfs4_call_sync(struct rpc_clnt *clnt,
732 struct nfs_server *server,
e73b83f2
BS		 733 struct rpc_message *msg,
734 struct nfs4_sequence_args *args,
735 struct nfs4_sequence_res *res,
736 int cache_reply)
737{
fd0c0953 738 nfs41_init_sequence(args, res, cache_reply);
7c513058 739 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
fd0c0953 740 args, res);
e73b83f2 741}
cccef3b9 742
38478b24 743static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 744{
38478b24 745 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 746
38478b24 747 spin_lock(&dir->i_lock);
359d7d1c 748 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 749 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 750 nfs_force_lookup_revalidate(dir);
a9a4a87a 751 dir->i_version = cinfo->after;
de242c0b 752 nfs_fscache_invalidate(dir);
38478b24 753 spin_unlock(&dir->i_lock);
1da177e4
LT		 754}
755
e56e0b78 756struct nfs4_opendata {
c6d00e63 757 struct kref kref;
e56e0b78
TM		 758 struct nfs_openargs o_arg;
759 struct nfs_openres o_res;
cdd4e68b
TM		 760 struct nfs_open_confirmargs c_arg;
761 struct nfs_open_confirmres c_res;
6926afd1
TM		 762 struct nfs4_string owner_name;
763 struct nfs4_string group_name;
e56e0b78 764 struct nfs_fattr f_attr;
e56e0b78 765 struct dentry *dir;
82a2c1b7 766 struct dentry *dentry;
e56e0b78 767 struct nfs4_state_owner *owner;
aac00a8d 768 struct nfs4_state *state;
e56e0b78 769 struct iattr attrs;
26e976a8 770 unsigned long timestamp;
3e309914 771 unsigned int rpc_done : 1;
bdeca1b7 772 unsigned int is_recover : 1;
24ac23ab
TM		 773 int rpc_status;
774 int cancelled;
e56e0b78
TM		 775};
776
49f9a0fa
TM		 777static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
778 int err, struct nfs4_exception *exception)
779{
780 if (err != -EINVAL)
781 return false;
782 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
783 return false;
784 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
785 exception->retry = 1;
786 return true;
787}
788
789static enum open_claim_type4
790nfs4_map_atomic_open_claim(struct nfs_server *server,
791 enum open_claim_type4 claim)
792{
793 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
794 return claim;
795 switch (claim) {
796 default:
797 return claim;
798 case NFS4_OPEN_CLAIM_FH:
799 return NFS4_OPEN_CLAIM_NULL;
800 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
801 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
802 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
803 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
804 }
805}
2ced46c2
TM		 806
807static void nfs4_init_opendata_res(struct nfs4_opendata *p)
808{
809 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 810 p->o_res.seqid = p->o_arg.seqid;
811 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 812 p->o_res.server = p->o_arg.server;
5f657530 813 p->o_res.access_request = p->o_arg.access;
2ced46c2 814 nfs_fattr_init(&p->f_attr);
6926afd1 815 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 816}
817
82a2c1b7 818static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 819 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 820 const struct iattr *attrs,
4a1c0893 821 enum open_claim_type4 claim,
8535b2be 822 gfp_t gfp_mask)
e56e0b78 823{
82a2c1b7 824 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 825 struct inode *dir = parent->d_inode;
826 struct nfs_server *server = NFS_SERVER(dir);
827 struct nfs4_opendata *p;
828
8535b2be 829 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 830 if (p == NULL)
831 goto err;
8535b2be 832 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 833 if (p->o_arg.seqid == NULL)
834 goto err_free;
82a2c1b7
AV		 835 nfs_sb_active(dentry->d_sb);
836 p->dentry = dget(dentry);
e56e0b78
TM		 837 p->dir = parent;
838 p->owner = sp;
839 atomic_inc(&sp->so_count);
dc0b027d
TM		 840 p->o_arg.open_flags = flags;
841 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 842 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
843 * will return permission denied for all bits until close */
844 if (!(flags & O_EXCL)) {
845 /* ask server to check for all possible rights as results
846 * are cached */
847 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
848 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 849 }
7539bbab 850 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 851 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
852 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 853 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 854 p->o_arg.server = server;
855 p->o_arg.bitmask = server->attr_bitmask;
1549210f 856 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
49f9a0fa
TM		 857 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
858 switch (p->o_arg.claim) {
4a1c0893
TM		 859 case NFS4_OPEN_CLAIM_NULL:
860 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
861 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
862 p->o_arg.fh = NFS_FH(dir);
863 break;
864 case NFS4_OPEN_CLAIM_PREVIOUS:
865 case NFS4_OPEN_CLAIM_FH:
866 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
867 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
868 p->o_arg.fh = NFS_FH(dentry->d_inode);
869 }
536e43d1 870 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 871 __be32 verf[2];
d77d76ff 872
e56e0b78
TM		 873 p->o_arg.u.attrs = &p->attrs;
874 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 875
876 verf[0] = jiffies;
877 verf[1] = current->pid;
878 memcpy(p->o_arg.u.verifier.data, verf,
879 sizeof(p->o_arg.u.verifier.data));
e56e0b78 880 }
cdd4e68b
TM		 881 p->c_arg.fh = &p->o_res.fh;
882 p->c_arg.stateid = &p->o_res.stateid;
883 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 884 nfs4_init_opendata_res(p);
c6d00e63 885 kref_init(&p->kref);
e56e0b78
TM		 886 return p;
887err_free:
888 kfree(p);
889err:
890 dput(parent);
891 return NULL;
892}
893
c6d00e63 894static void nfs4_opendata_free(struct kref *kref)
e56e0b78 895{
c6d00e63
TM		 896 struct nfs4_opendata *p = container_of(kref,
897 struct nfs4_opendata, kref);
82a2c1b7 898 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 899
900 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 901 if (p->state != NULL)
902 nfs4_put_open_state(p->state);
c6d00e63
TM		 903 nfs4_put_state_owner(p->owner);
904 dput(p->dir);
82a2c1b7
AV		 905 dput(p->dentry);
906 nfs_sb_deactive(sb);
6926afd1 907 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 908 kfree(p);
909}
910
911static void nfs4_opendata_put(struct nfs4_opendata *p)
912{
913 if (p != NULL)
914 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 915}
916
06f814a3
TM		 917static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
918{
06f814a3
TM		 919 int ret;
920
06f814a3 921 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 922 return ret;
923}
924
dc0b027d 925static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 926{
927 int ret = 0;
dc0b027d 928
536e43d1 929 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 930 goto out;
931 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 932 case FMODE_READ:
88069f77
TM		 933 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
934 && state->n_rdonly != 0;
6ee41268
TM		 935 break;
936 case FMODE_WRITE:
88069f77
TM		 937 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
938 && state->n_wronly != 0;
6ee41268
TM		 939 break;
940 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 941 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
942 && state->n_rdwr != 0;
6ee41268 943 }
dc0b027d 944out:
6ee41268
TM		 945 return ret;
946}
947
dc0b027d 948static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 949{
652f89f6
TM		 950 if (delegation == NULL)
951 return 0;
dc0b027d 952 if ((delegation->type & fmode) != fmode)
aac00a8d 953 return 0;
15c831bf 954 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 955 return 0;
d25be546
TM		 956 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
957 return 0;
b7391f44 958 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 959 return 1;
960}
961
dc0b027d 962static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 963{
dc0b027d 964 switch (fmode) {
e7616923
TM		 965 case FMODE_WRITE:
966 state->n_wronly++;
967 break;
968 case FMODE_READ:
969 state->n_rdonly++;
970 break;
971 case FMODE_READ|FMODE_WRITE:
972 state->n_rdwr++;
973 }
dc0b027d 974 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 975}
976
dc0b027d 977static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 978{
979 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 980 nfs4_stateid_copy(&state->stateid, stateid);
981 nfs4_stateid_copy(&state->open_stateid, stateid);
92b40e93 982 set_bit(NFS_OPEN_STATE, &state->flags);
dc0b027d 983 switch (fmode) {
003707c7
TM		 984 case FMODE_READ:
985 set_bit(NFS_O_RDONLY_STATE, &state->flags);
986 break;
987 case FMODE_WRITE:
988 set_bit(NFS_O_WRONLY_STATE, &state->flags);
989 break;
990 case FMODE_READ|FMODE_WRITE:
991 set_bit(NFS_O_RDWR_STATE, &state->flags);
992 }
e7616923
TM		 993}
994
dc0b027d 995static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 996{
8bda4e4c 997 write_seqlock(&state->seqlock);
dc0b027d 998 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 999 write_sequnlock(&state->seqlock);
003707c7
TM		 1000}
1001
dc0b027d 1002static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1003{
8bda4e4c
TM		 1004 /*
1005 * Protect the call to nfs4_state_set_mode_locked and
1006 * serialise the stateid update
1007 */
1008 write_seqlock(&state->seqlock);
003707c7 1009 if (deleg_stateid != NULL) {
f597c537 1010 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1011 set_bit(NFS_DELEGATED_STATE, &state->flags);
1012 }
1013 if (open_stateid != NULL)
dc0b027d 1014 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1015 write_sequnlock(&state->seqlock);
1016 spin_lock(&state->owner->so_lock);
dc0b027d 1017 update_open_stateflags(state, fmode);
ec073428 1018 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1019}
1020
dc0b027d 1021static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1022{
1023 struct nfs_inode *nfsi = NFS_I(state->inode);
1024 struct nfs_delegation *deleg_cur;
1025 int ret = 0;
1026
dc0b027d 1027 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1028
1029 rcu_read_lock();
1030 deleg_cur = rcu_dereference(nfsi->delegation);
1031 if (deleg_cur == NULL)
1032 goto no_delegation;
1033
1034 spin_lock(&deleg_cur->lock);
1035 if (nfsi->delegation != deleg_cur ||
d25be546 1036 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1037 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1038 goto no_delegation_unlock;
1039
1040 if (delegation == NULL)
1041 delegation = &deleg_cur->stateid;
f597c537 1042 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1043 goto no_delegation_unlock;
1044
b7391f44 1045 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1046 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1047 ret = 1;
1048no_delegation_unlock:
1049 spin_unlock(&deleg_cur->lock);
1050no_delegation:
1051 rcu_read_unlock();
1052
1053 if (!ret && open_stateid != NULL) {
dc0b027d 1054 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1055 ret = 1;
1056 }
1057
1058 return ret;
1059}
1060
1061
dc0b027d 1062static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1063{
1064 struct nfs_delegation *delegation;
1065
1066 rcu_read_lock();
1067 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1068 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1069 rcu_read_unlock();
1070 return;
1071 }
1072 rcu_read_unlock();
57ec14c5 1073 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1074}
1075
6ee41268 1076static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1077{
1078 struct nfs4_state *state = opendata->state;
1079 struct nfs_inode *nfsi = NFS_I(state->inode);
1080 struct nfs_delegation *delegation;
536e43d1 1081 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1082 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1083 nfs4_stateid stateid;
1084 int ret = -EAGAIN;
1085
aac00a8d 1086 for (;;) {
dc0b027d 1087 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1088 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1089 if (can_open_cached(state, fmode, open_mode)) {
1090 update_open_stateflags(state, fmode);
6ee41268 1091 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1092 goto out_return_state;
1093 }
1094 spin_unlock(&state->owner->so_lock);
1095 }
34310430
TM		 1096 rcu_read_lock();
1097 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1098 if (!can_open_delegated(delegation, fmode)) {
34310430 1099 rcu_read_unlock();
aac00a8d 1100 break;
34310430 1101 }
aac00a8d 1102 /* Save the delegation */
f597c537 1103 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1104 rcu_read_unlock();
fa332941 1105 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1106 if (!opendata->is_recover) {
1107 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1108 if (ret != 0)
1109 goto out;
1110 }
aac00a8d 1111 ret = -EAGAIN;
34310430
TM		 1112
1113 /* Try to update the stateid using the delegation */
dc0b027d 1114 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1115 goto out_return_state;
aac00a8d 1116 }
aac00a8d
TM		 1117out:
1118 return ERR_PTR(ret);
1119out_return_state:
1120 atomic_inc(&state->count);
1121 return state;
1122}
1123
e23008ec
AA		 1124static void
1125nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1126{
1127 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1128 struct nfs_delegation *delegation;
1129 int delegation_flags = 0;
1130
1131 rcu_read_lock();
1132 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1133 if (delegation)
1134 delegation_flags = delegation->flags;
1135 rcu_read_unlock();
1136 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1137 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1138 "returning a delegation for "
1139 "OPEN(CLAIM_DELEGATE_CUR)\n",
1140 clp->cl_hostname);
1141 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1142 nfs_inode_set_delegation(state->inode,
1143 data->owner->so_cred,
1144 &data->o_res);
1145 else
1146 nfs_inode_reclaim_delegation(state->inode,
1147 data->owner->so_cred,
1148 &data->o_res);
1149}
1150
1151/*
1152 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1153 * and update the nfs4_state.
1154 */
1155static struct nfs4_state *
1156_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1157{
1158 struct inode *inode = data->state->inode;
1159 struct nfs4_state *state = data->state;
1160 int ret;
1161
1162 if (!data->rpc_done) {
1163 ret = data->rpc_status;
1164 goto err;
1165 }
1166
1167 ret = -ESTALE;
1168 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1169 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1170 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1171 goto err;
1172
1173 ret = -ENOMEM;
1174 state = nfs4_get_open_state(inode, data->owner);
1175 if (state == NULL)
1176 goto err;
1177
1178 ret = nfs_refresh_inode(inode, &data->f_attr);
1179 if (ret)
1180 goto err;
1181
1182 if (data->o_res.delegation_type != 0)
1183 nfs4_opendata_check_deleg(data, state);
1184 update_open_stateid(state, &data->o_res.stateid, NULL,
1185 data->o_arg.fmode);
1186
1187 return state;
1188err:
1189 return ERR_PTR(ret);
1190
1191}
1192
1193static struct nfs4_state *
1194_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1195{
1196 struct inode *inode;
1197 struct nfs4_state *state = NULL;
1b370bc2 1198 int ret;
24ac23ab 1199
aac00a8d 1200 if (!data->rpc_done) {
6ee41268 1201 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1202 goto out;
1203 }
1204
1b370bc2 1205 ret = -EAGAIN;
24ac23ab 1206 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1207 goto err;
24ac23ab 1208 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1209 ret = PTR_ERR(inode);
03f28e3a 1210 if (IS_ERR(inode))
1b370bc2
TM		 1211 goto err;
1212 ret = -ENOMEM;
24ac23ab
TM		 1213 state = nfs4_get_open_state(inode, data->owner);
1214 if (state == NULL)
1b370bc2 1215 goto err_put_inode;
e23008ec
AA		 1216 if (data->o_res.delegation_type != 0)
1217 nfs4_opendata_check_deleg(data, state);
34310430 1218 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1219 data->o_arg.fmode);
24ac23ab 1220 iput(inode);
aac00a8d 1221out:
7aa262b5 1222 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1223 return state;
1b370bc2
TM		 1224err_put_inode:
1225 iput(inode);
1226err:
1227 return ERR_PTR(ret);
24ac23ab
TM		 1228}
1229
e23008ec
AA		 1230static struct nfs4_state *
1231nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1232{
1233 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1234 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1235 return _nfs4_opendata_to_nfs4_state(data);
1236}
1237
864472e9
TM		 1238static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1239{
1240 struct nfs_inode *nfsi = NFS_I(state->inode);
1241 struct nfs_open_context *ctx;
1242
1243 spin_lock(&state->inode->i_lock);
1244 list_for_each_entry(ctx, &nfsi->open_files, list) {
1245 if (ctx->state != state)
1246 continue;
1247 get_nfs_open_context(ctx);
1248 spin_unlock(&state->inode->i_lock);
1249 return ctx;
1250 }
1251 spin_unlock(&state->inode->i_lock);
1252 return ERR_PTR(-ENOENT);
1253}
1254
4a1c0893
TM		 1255static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1256 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1257{
1258 struct nfs4_opendata *opendata;
1259
4a1c0893
TM		 1260 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1261 NULL, claim, GFP_NOFS);
6f220ed5
TM		 1262 if (opendata == NULL)
1263 return ERR_PTR(-ENOMEM);
1264 opendata->state = state;
1265 atomic_inc(&state->count);
1266 return opendata;
1267}
1268
dc0b027d 1269static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1270{
2ced46c2 1271 struct nfs4_state *newstate;
864472e9
TM		 1272 int ret;
1273
dc0b027d
TM		 1274 opendata->o_arg.open_flags = 0;
1275 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1276 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1277 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1278 nfs4_init_opendata_res(opendata);
b257957e 1279 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1280 if (ret != 0)
1281 return ret;
2ced46c2 1282 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1283 if (IS_ERR(newstate))
1284 return PTR_ERR(newstate);
643168c2 1285 nfs4_close_state(newstate, fmode);
2ced46c2 1286 *res = newstate;
864472e9
TM		 1287 return 0;
1288}
1289
1290static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1291{
864472e9 1292 struct nfs4_state *newstate;
864472e9
TM		 1293 int ret;
1294
1295 /* memory barrier prior to reading state->n_* */
2ced46c2 1296 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1297 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1298 smp_rmb();
1299 if (state->n_rdwr != 0) {
b0ed9dbc 1300 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1301 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1302 if (ret != 0)
1303 return ret;
2ced46c2
TM		 1304 if (newstate != state)
1305 return -ESTALE;
864472e9
TM		 1306 }
1307 if (state->n_wronly != 0) {
b0ed9dbc 1308 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1309 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1310 if (ret != 0)
1311 return ret;
2ced46c2
TM		 1312 if (newstate != state)
1313 return -ESTALE;
864472e9
TM		 1314 }
1315 if (state->n_rdonly != 0) {
b0ed9dbc 1316 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1317 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1318 if (ret != 0)
1319 return ret;
2ced46c2
TM		 1320 if (newstate != state)
1321 return -ESTALE;
864472e9 1322 }
1ac7e2fd
TM		 1323 /*
1324 * We may have performed cached opens for all three recoveries.
1325 * Check if we need to update the current stateid.
1326 */
1327 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1328 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1329 write_seqlock(&state->seqlock);
1ac7e2fd 1330 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1331 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1332 write_sequnlock(&state->seqlock);
1ac7e2fd 1333 }
864472e9
TM		 1334 return 0;
1335}
1336
1da177e4
LT		 1337/*
1338 * OPEN_RECLAIM:
1339 * reclaim state on the server after a reboot.
1da177e4 1340 */
539cd03a 1341static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1342{
1ac7e2fd 1343 struct nfs_delegation *delegation;
864472e9 1344 struct nfs4_opendata *opendata;
dc0b027d 1345 fmode_t delegation_type = 0;
1da177e4
LT		 1346 int status;
1347
4a1c0893
TM		 1348 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1349 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1350 if (IS_ERR(opendata))
1351 return PTR_ERR(opendata);
1ac7e2fd
TM		 1352 rcu_read_lock();
1353 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1354 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1355 delegation_type = delegation->type;
1ac7e2fd 1356 rcu_read_unlock();
864472e9
TM		 1357 opendata->o_arg.u.delegation_type = delegation_type;
1358 status = nfs4_open_recover(opendata, state);
c6d00e63 1359 nfs4_opendata_put(opendata);
1da177e4
LT		 1360 return status;
1361}
1362
539cd03a 1363static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1364{
1365 struct nfs_server *server = NFS_SERVER(state->inode);
1366 struct nfs4_exception exception = { };
1367 int err;
1368 do {
539cd03a 1369 err = _nfs4_do_open_reclaim(ctx, state);
49f9a0fa
TM		 1370 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1371 continue;
168667c4 1372 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1373 break;
1374 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1375 } while (exception.retry);
1376 return err;
1377}
1378
864472e9
TM		 1379static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1380{
1381 struct nfs_open_context *ctx;
1382 int ret;
1383
1384 ctx = nfs4_state_find_open_context(state);
1385 if (IS_ERR(ctx))
91876b13 1386 return -EAGAIN;
539cd03a 1387 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1388 put_nfs_open_context(ctx);
1389 return ret;
1390}
1391
db4f2e63 1392static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1393{
be76b5b6
TM		 1394 switch (err) {
1395 default:
1396 printk(KERN_ERR "NFS: %s: unhandled error "
1397 "%d.\n", __func__, err);
1398 case 0:
1399 case -ENOENT:
1400 case -ESTALE:
1401 break;
1402 case -NFS4ERR_BADSESSION:
1403 case -NFS4ERR_BADSLOT:
1404 case -NFS4ERR_BAD_HIGH_SLOT:
1405 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1406 case -NFS4ERR_DEADSESSION:
1407 set_bit(NFS_DELEGATED_STATE, &state->flags);
1408 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1409 return -EAGAIN;
1410 case -NFS4ERR_STALE_CLIENTID:
1411 case -NFS4ERR_STALE_STATEID:
1412 set_bit(NFS_DELEGATED_STATE, &state->flags);
1413 case -NFS4ERR_EXPIRED:
1414 /* Don't recall a delegation if it was lost */
1415 nfs4_schedule_lease_recovery(server->nfs_client);
1416 return -EAGAIN;
1417 case -NFS4ERR_DELEG_REVOKED:
1418 case -NFS4ERR_ADMIN_REVOKED:
1419 case -NFS4ERR_BAD_STATEID:
db4f2e63 1420 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1421 nfs_inode_find_state_and_recover(state->inode,
1422 stateid);
1423 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1424 return 0;
1425 case -NFS4ERR_DELAY:
1426 case -NFS4ERR_GRACE:
1427 set_bit(NFS_DELEGATED_STATE, &state->flags);
1428 ssleep(1);
1429 return -EAGAIN;
db4f2e63
TM		 1430 case -ENOMEM:
1431 case -NFS4ERR_DENIED:
1432 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1433 return 0;
be76b5b6 1434 }
1da177e4
LT		 1435 return err;
1436}
1437
db4f2e63
TM		 1438int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1439{
1440 struct nfs_server *server = NFS_SERVER(state->inode);
1441 struct nfs4_opendata *opendata;
1442 int err;
1443
1444 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1445 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1446 if (IS_ERR(opendata))
1447 return PTR_ERR(opendata);
1448 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1449 err = nfs4_open_recover(opendata, state);
1450 nfs4_opendata_put(opendata);
1451 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1452}
1453
cdd4e68b
TM		 1454static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1455{
1456 struct nfs4_opendata *data = calldata;
1457
1458 data->rpc_status = task->tk_status;
26e976a8 1459 if (data->rpc_status == 0) {
f597c537 1460 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1461 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1462 renew_lease(data->o_res.server, data->timestamp);
3e309914 1463 data->rpc_done = 1;
26e976a8 1464 }
cdd4e68b
TM		 1465}
1466
1467static void nfs4_open_confirm_release(void *calldata)
1468{
1469 struct nfs4_opendata *data = calldata;
1470 struct nfs4_state *state = NULL;
1471
1472 /* If this request hasn't been cancelled, do nothing */
1473 if (data->cancelled == 0)
1474 goto out_free;
1475 /* In case of error, no cleanup! */
3e309914 1476 if (!data->rpc_done)
cdd4e68b 1477 goto out_free;
cdd4e68b 1478 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1479 if (!IS_ERR(state))
643168c2 1480 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1481out_free:
c6d00e63 1482 nfs4_opendata_put(data);
cdd4e68b
TM		 1483}
1484
1485static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1486 .rpc_call_done = nfs4_open_confirm_done,
1487 .rpc_release = nfs4_open_confirm_release,
1488};
1489
1490/*
1491 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1492 */
1493static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1494{
1495 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1496 struct rpc_task *task;
5138fde0
TM		 1497 struct rpc_message msg = {
1498 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1499 .rpc_argp = &data->c_arg,
1500 .rpc_resp = &data->c_res,
1501 .rpc_cred = data->owner->so_cred,
1502 };
c970aa85
TM		 1503 struct rpc_task_setup task_setup_data = {
1504 .rpc_client = server->client,
5138fde0 1505 .rpc_message = &msg,
c970aa85
TM		 1506 .callback_ops = &nfs4_open_confirm_ops,
1507 .callback_data = data,
101070ca 1508 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1509 .flags = RPC_TASK_ASYNC,
1510 };
1da177e4
LT		 1511 int status;
1512
c6d00e63 1513 kref_get(&data->kref);
3e309914
TM		 1514 data->rpc_done = 0;
1515 data->rpc_status = 0;
5138fde0 1516 data->timestamp = jiffies;
c970aa85 1517 task = rpc_run_task(&task_setup_data);
7a1218a2 1518 if (IS_ERR(task))
cdd4e68b 1519 return PTR_ERR(task);
cdd4e68b
TM		 1520 status = nfs4_wait_for_completion_rpc_task(task);
1521 if (status != 0) {
1522 data->cancelled = 1;
1523 smp_wmb();
1524 } else
1525 status = data->rpc_status;
e6b3c4db 1526 rpc_put_task(task);
1da177e4
LT		 1527 return status;
1528}
1529
24ac23ab 1530static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1531{
24ac23ab
TM		 1532 struct nfs4_opendata *data = calldata;
1533 struct nfs4_state_owner *sp = data->owner;
549b19cc 1534 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1535
24ac23ab 1536 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1537 goto out_wait;
aac00a8d
TM		 1538 /*
1539 * Check if we still need to send an OPEN call, or if we can use
1540 * a delegation instead.
1541 */
1542 if (data->state != NULL) {
1543 struct nfs_delegation *delegation;
1544
dc0b027d 1545 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1546 goto out_no_action;
aac00a8d
TM		 1547 rcu_read_lock();
1548 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1549 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1550 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1551 can_open_delegated(delegation, data->o_arg.fmode))
1552 goto unlock_no_action;
aac00a8d
TM		 1553 rcu_read_unlock();
1554 }
95b72eb0 1555 /* Update client id. */
549b19cc 1556 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1557 switch (data->o_arg.claim) {
1558 case NFS4_OPEN_CLAIM_PREVIOUS:
1559 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1560 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1561 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1562 case NFS4_OPEN_CLAIM_FH:
1563 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1564 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1565 }
26e976a8 1566 data->timestamp = jiffies;
035168ab 1567 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1568 &data->o_arg.seq_args,
2240a9e2
TM		 1569 &data->o_res.seq_res,
1570 task) != 0)
1571 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1572
1573 /* Set the create mode (note dependency on the session type) */
1574 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1575 if (data->o_arg.open_flags & O_EXCL) {
1576 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1577 if (nfs4_has_persistent_session(clp))
1578 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1579 else if (clp->cl_mvops->minor_version > 0)
1580 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1581 }
6ee41268 1582 return;
652f89f6
TM		 1583unlock_no_action:
1584 rcu_read_unlock();
6ee41268
TM		 1585out_no_action:
1586 task->tk_action = NULL;
c8da19b9 1587out_wait:
b75ad4cd 1588 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1589}
1590
24ac23ab
TM		 1591static void nfs4_open_done(struct rpc_task *task, void *calldata)
1592{
1593 struct nfs4_opendata *data = calldata;
1da177e4 1594
24ac23ab 1595 data->rpc_status = task->tk_status;
d898528c 1596
14516c3a
TM		 1597 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1598 return;
d898528c 1599
24ac23ab 1600 if (task->tk_status == 0) {
807d66d8
TM		 1601 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1602 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1603 case S_IFREG:
1604 break;
1605 case S_IFLNK:
24ac23ab 1606 data->rpc_status = -ELOOP;
6f926b5b
TM		 1607 break;
1608 case S_IFDIR:
24ac23ab 1609 data->rpc_status = -EISDIR;
6f926b5b
TM		 1610 break;
1611 default:
24ac23ab 1612 data->rpc_status = -ENOTDIR;
807d66d8 1613 }
6f926b5b 1614 }
26e976a8 1615 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1616 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1617 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1618 }
3e309914 1619 data->rpc_done = 1;
24ac23ab 1620}
6f926b5b 1621
24ac23ab
TM		 1622static void nfs4_open_release(void *calldata)
1623{
1624 struct nfs4_opendata *data = calldata;
1625 struct nfs4_state *state = NULL;
1626
1627 /* If this request hasn't been cancelled, do nothing */
1628 if (data->cancelled == 0)
1629 goto out_free;
1630 /* In case of error, no cleanup! */
3e309914 1631 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1632 goto out_free;
1633 /* In case we need an open_confirm, no cleanup! */
1634 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1635 goto out_free;
24ac23ab 1636 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1637 if (!IS_ERR(state))
643168c2 1638 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1639out_free:
c6d00e63 1640 nfs4_opendata_put(data);
24ac23ab
TM		 1641}
1642
1643static const struct rpc_call_ops nfs4_open_ops = {
1644 .rpc_call_prepare = nfs4_open_prepare,
1645 .rpc_call_done = nfs4_open_done,
1646 .rpc_release = nfs4_open_release,
1647};
1648
b257957e 1649static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1650{
1651 struct inode *dir = data->dir->d_inode;
1652 struct nfs_server *server = NFS_SERVER(dir);
1653 struct nfs_openargs *o_arg = &data->o_arg;
1654 struct nfs_openres *o_res = &data->o_res;
1655 struct rpc_task *task;
5138fde0
TM		 1656 struct rpc_message msg = {
1657 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1658 .rpc_argp = o_arg,
1659 .rpc_resp = o_res,
1660 .rpc_cred = data->owner->so_cred,
1661 };
c970aa85
TM		 1662 struct rpc_task_setup task_setup_data = {
1663 .rpc_client = server->client,
5138fde0 1664 .rpc_message = &msg,
c970aa85
TM		 1665 .callback_ops = &nfs4_open_ops,
1666 .callback_data = data,
101070ca 1667 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1668 .flags = RPC_TASK_ASYNC,
1669 };
24ac23ab
TM		 1670 int status;
1671
9d12b216 1672 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1673 kref_get(&data->kref);
3e309914
TM		 1674 data->rpc_done = 0;
1675 data->rpc_status = 0;
2ced46c2 1676 data->cancelled = 0;
bdeca1b7
TM		 1677 data->is_recover = 0;
1678 if (isrecover) {
8fe72bac 1679 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1680 data->is_recover = 1;
1681 }
c970aa85 1682 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1683 if (IS_ERR(task))
1684 return PTR_ERR(task);
1685 status = nfs4_wait_for_completion_rpc_task(task);
1686 if (status != 0) {
1687 data->cancelled = 1;
1688 smp_wmb();
1689 } else
1690 status = data->rpc_status;
1691 rpc_put_task(task);
1692
1693 return status;
1694}
1695
1696static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1697{
1698 struct inode *dir = data->dir->d_inode;
1699 struct nfs_openres *o_res = &data->o_res;
1700 int status;
1701
1702 status = nfs4_run_open_task(data, 1);
1703 if (status != 0 || !data->rpc_done)
1704 return status;
1705
6926afd1
TM		 1706 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1707
b257957e
AB		 1708 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1709 status = _nfs4_proc_open_confirm(data);
1710 if (status != 0)
1711 return status;
1712 }
1713
1714 return status;
1715}
1716
6168f62c
WAA		 1717static int nfs4_opendata_access(struct rpc_cred *cred,
1718 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1719 struct nfs4_state *state, fmode_t fmode,
1720 int openflags)
6168f62c
WAA		 1721{
1722 struct nfs_access_entry cache;
1723 u32 mask;
1724
1725 /* access call failed or for some reason the server doesn't
1726 * support any access modes -- defer access call until later */
1727 if (opendata->o_res.access_supported == 0)
1728 return 0;
1729
1730 mask = 0;
bbd3a8ee 1731 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1732 * write mode bits, but POSIX allows the creating process to write.
1733 * use openflags to check for exec, because fmode won't
1734 * always have FMODE_EXEC set when file open for exec. */
1735 if (openflags & __FMODE_EXEC) {
1736 /* ONLY check for exec rights */
1737 mask = MAY_EXEC;
1738 } else if (fmode & FMODE_READ)
1739 mask = MAY_READ;
6168f62c
WAA		 1740
1741 cache.cred = cred;
1742 cache.jiffies = jiffies;
1743 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1744 nfs_access_add_cache(state->inode, &cache);
1745
bbd3a8ee 1746 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1747 return 0;
1748
1749 /* even though OPEN succeeded, access is denied. Close the file */
1750 nfs4_close_state(state, fmode);
998f40b5 1751 return -EACCES;
6168f62c
WAA		 1752}
1753
b257957e
AB		 1754/*
1755 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1756 */
1757static int _nfs4_proc_open(struct nfs4_opendata *data)
1758{
1759 struct inode *dir = data->dir->d_inode;
1760 struct nfs_server *server = NFS_SERVER(dir);
1761 struct nfs_openargs *o_arg = &data->o_arg;
1762 struct nfs_openres *o_res = &data->o_res;
1763 int status;
1764
1765 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1766 if (!data->rpc_done)
1767 return status;
1768 if (status != 0) {
1769 if (status == -NFS4ERR_BADNAME &&
1770 !(o_arg->open_flags & O_CREAT))
1771 return -ENOENT;
24ac23ab 1772 return status;
08ef7bd3 1773 }
24ac23ab 1774
6926afd1
TM		 1775 nfs_fattr_map_and_free_names(server, &data->f_attr);
1776
90ff0c54 1777 if (o_arg->open_flags & O_CREAT)
56ae19f3 1778 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1779 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1780 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1781 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1782 status = _nfs4_proc_open_confirm(data);
1da177e4 1783 if (status != 0)
24ac23ab 1784 return status;
1da177e4
LT		 1785 }
1786 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1787 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1788 return 0;
1da177e4
LT		 1789}
1790
d83217c1
AA		 1791static int nfs4_recover_expired_lease(struct nfs_server *server)
1792{
1793 return nfs4_client_recover_expired_lease(server->nfs_client);
1794}
1795
1da177e4
LT		 1796/*
1797 * OPEN_EXPIRED:
1798 * reclaim state on the server after a network partition.
1799 * Assumes caller holds the appropriate lock
1800 */
539cd03a 1801static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1802{
e56e0b78 1803 struct nfs4_opendata *opendata;
864472e9 1804 int ret;
1da177e4 1805
4a1c0893 1806 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1807 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1808 if (IS_ERR(opendata))
1809 return PTR_ERR(opendata);
864472e9 1810 ret = nfs4_open_recover(opendata, state);
35d05778 1811 if (ret == -ESTALE)
3d4ff43d 1812 d_drop(ctx->dentry);
c6d00e63 1813 nfs4_opendata_put(opendata);
864472e9 1814 return ret;
1da177e4
LT		 1815}
1816
a9ed2e25 1817static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1818{
539cd03a 1819 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1820 struct nfs4_exception exception = { };
1821 int err;
1822
1823 do {
539cd03a 1824 err = _nfs4_open_expired(ctx, state);
49f9a0fa
TM		 1825 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1826 continue;
a9ed2e25
TM		 1827 switch (err) {
1828 default:
1829 goto out;
1830 case -NFS4ERR_GRACE:
1831 case -NFS4ERR_DELAY:
1832 nfs4_handle_exception(server, err, &exception);
1833 err = 0;
1834 }
202b50dc 1835 } while (exception.retry);
a9ed2e25 1836out:
202b50dc
TM		 1837 return err;
1838}
1839
1da177e4
LT		 1840static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1841{
1da177e4 1842 struct nfs_open_context *ctx;
864472e9 1843 int ret;
1da177e4 1844
864472e9
TM		 1845 ctx = nfs4_state_find_open_context(state);
1846 if (IS_ERR(ctx))
91876b13 1847 return -EAGAIN;
539cd03a 1848 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1849 put_nfs_open_context(ctx);
1850 return ret;
1da177e4
LT		 1851}
1852
f062eb6c 1853#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1854static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1855{
f062eb6c 1856 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1857 nfs4_stateid *stateid = &state->stateid;
1858 int status;
1859
1860 /* If a state reset has been done, test_stateid is unneeded */
1861 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1862 return;
1863
1864 status = nfs41_test_stateid(server, stateid);
1865 if (status != NFS_OK) {
1866 /* Free the stateid unless the server explicitly
1867 * informs us the stateid is unrecognized. */
1868 if (status != -NFS4ERR_BAD_STATEID)
1869 nfs41_free_stateid(server, stateid);
6938867e 1870 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1871
6938867e
BS		 1872 write_seqlock(&state->seqlock);
1873 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1874 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1875 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1876 }
1877}
1878
1879/**
1880 * nfs41_check_open_stateid - possibly free an open stateid
1881 *
1882 * @state: NFSv4 state for an inode
1883 *
1884 * Returns NFS_OK if recovery for this stateid is now finished.
1885 * Otherwise a negative NFS4ERR value is returned.
1886 */
1887static int nfs41_check_open_stateid(struct nfs4_state *state)
1888{
1889 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1890 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1891 int status;
1892
1893 /* If a state reset has been done, test_stateid is unneeded */
1894 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1895 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1896 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1897 return -NFS4ERR_BAD_STATEID;
1898
1899 status = nfs41_test_stateid(server, stateid);
1900 if (status != NFS_OK) {
1901 /* Free the stateid unless the server explicitly
1902 * informs us the stateid is unrecognized. */
1903 if (status != -NFS4ERR_BAD_STATEID)
1904 nfs41_free_stateid(server, stateid);
1905
1906 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1907 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1908 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 1909 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 1910 }
1911 return status;
1912}
1913
1914static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1915{
eb64cf96 1916 int status;
b01dd1d8 1917
3e60ffdd
CL		 1918 nfs41_clear_delegation_stateid(state);
1919 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1920 if (status != NFS_OK)
1921 status = nfs4_open_expired(sp, state);
1922 return status;
f062eb6c
BS		 1923}
1924#endif
1925
aa53ed54
JL		 1926/*
1927 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1928 * fields corresponding to attributes that were used to store the verifier.
1929 * Make sure we clobber those fields in the later setattr call
1930 */
1931static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1932{
1933 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1934 !(sattr->ia_valid & ATTR_ATIME_SET))
1935 sattr->ia_valid |= ATTR_ATIME;
1936
1937 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1938 !(sattr->ia_valid & ATTR_MTIME_SET))
1939 sattr->ia_valid |= ATTR_MTIME;
1940}
1941
c21443c2
TM		 1942static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1943 fmode_t fmode,
1944 int flags,
1945 struct nfs4_state **res)
1946{
1947 struct nfs4_state_owner *sp = opendata->owner;
1948 struct nfs_server *server = sp->so_server;
1949 struct nfs4_state *state;
1950 unsigned int seq;
1951 int ret;
1952
1953 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1954
1955 ret = _nfs4_proc_open(opendata);
1956 if (ret != 0)
1957 goto out;
1958
1959 state = nfs4_opendata_to_nfs4_state(opendata);
1960 ret = PTR_ERR(state);
1961 if (IS_ERR(state))
1962 goto out;
1963 if (server->caps & NFS_CAP_POSIX_LOCK)
1964 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1965
1966 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1967 if (ret != 0)
1968 goto out;
1969
91876b13 1970 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
c21443c2 1971 nfs4_schedule_stateid_recovery(server, state);
c21443c2
TM		 1972 *res = state;
1973out:
1974 return ret;
1975}
1976
1da177e4 1977/*
24ac23ab 1978 * Returns a referenced nfs4_state
1da177e4 1979 */
82be417a
AA		 1980static int _nfs4_do_open(struct inode *dir,
1981 struct dentry *dentry,
1982 fmode_t fmode,
1983 int flags,
1984 struct iattr *sattr,
1985 struct rpc_cred *cred,
1986 struct nfs4_state **res,
1987 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1988{
1989 struct nfs4_state_owner *sp;
1990 struct nfs4_state *state = NULL;
1991 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1992 struct nfs4_opendata *opendata;
49f9a0fa 1993 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
aac00a8d 1994 int status;
1da177e4
LT		 1995
1996 /* Protect against reboot recovery conflicts */
1da177e4 1997 status = -ENOMEM;
d1e284d5
TM		 1998 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1999 if (sp == NULL) {
1da177e4
LT		 2000 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2001 goto out_err;
2002 }
58d9714a
TM		 2003 status = nfs4_recover_expired_lease(server);
2004 if (status != 0)
b4454fe1 2005 goto err_put_state_owner;
82a2c1b7
AV		 2006 if (dentry->d_inode != NULL)
2007 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2008 status = -ENOMEM;
49f9a0fa
TM		 2009 if (dentry->d_inode)
2010 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2011 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
49f9a0fa 2012 claim, GFP_KERNEL);
e56e0b78 2013 if (opendata == NULL)
95d35cb4 2014 goto err_put_state_owner;
1da177e4 2015
82be417a
AA		 2016 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2017 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2018 if (!opendata->f_attr.mdsthreshold)
2019 goto err_opendata_put;
1549210f 2020 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2021 }
82a2c1b7
AV		 2022 if (dentry->d_inode != NULL)
2023 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2024
c21443c2 2025 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
6168f62c
WAA		 2026 if (status != 0)
2027 goto err_opendata_put;
2028
549b19cc
TM		 2029 if ((opendata->o_arg.open_flags & O_EXCL) &&
2030 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2031 nfs4_exclusive_attrset(opendata, sattr);
2032
2033 nfs_fattr_init(opendata->o_res.f_attr);
2034 status = nfs4_do_setattr(state->inode, cred,
2035 opendata->o_res.f_attr, sattr,
2036 state);
2037 if (status == 0)
2038 nfs_setattr_update_inode(state->inode, sattr);
2039 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2040 }
82be417a
AA		 2041
2042 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2043 *ctx_th = opendata->f_attr.mdsthreshold;
2044 else
2045 kfree(opendata->f_attr.mdsthreshold);
2046 opendata->f_attr.mdsthreshold = NULL;
2047
c6d00e63 2048 nfs4_opendata_put(opendata);
1da177e4 2049 nfs4_put_state_owner(sp);
1da177e4
LT		 2050 *res = state;
2051 return 0;
c6d00e63 2052err_opendata_put:
82be417a 2053 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2054 nfs4_opendata_put(opendata);
e56e0b78
TM		 2055err_put_state_owner:
2056 nfs4_put_state_owner(sp);
1da177e4 2057out_err:
1da177e4
LT		 2058 *res = NULL;
2059 return status;
2060}
2061
2062
82be417a
AA		 2063static struct nfs4_state *nfs4_do_open(struct inode *dir,
2064 struct dentry *dentry,
2065 fmode_t fmode,
2066 int flags,
2067 struct iattr *sattr,
2068 struct rpc_cred *cred,
2069 struct nfs4_threshold **ctx_th)
1da177e4 2070{
49f9a0fa 2071 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2072 struct nfs4_exception exception = { };
2073 struct nfs4_state *res;
2074 int status;
2075
6168f62c 2076 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 2077 do {
82be417a
AA		 2078 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
2079 &res, ctx_th);
1da177e4
LT		 2080 if (status == 0)
2081 break;
2082 /* NOTE: BAD_SEQID means the server and client disagree about the
2083 * book-keeping w.r.t. state-changing operations
2084 * (OPEN/CLOSE/LOCK/LOCKU...)
2085 * It is actually a sign of a bug on the client or on the server.
2086 *
2087 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2088 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2089 * have unhashed the old state_owner for us, and that we can
2090 * therefore safely retry using a new one. We should still warn
2091 * the user though...
2092 */
2093 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2094 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2095 " returned a bad sequence-id error!\n",
2096 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2097 exception.retry = 1;
2098 continue;
2099 }
550f5747
TM		 2100 /*
2101 * BAD_STATEID on OPEN means that the server cancelled our
2102 * state before it received the OPEN_CONFIRM.
2103 * Recover by retrying the request as per the discussion
2104 * on Page 181 of RFC3530.
2105 */
2106 if (status == -NFS4ERR_BAD_STATEID) {
2107 exception.retry = 1;
2108 continue;
2109 }
aac00a8d
TM		 2110 if (status == -EAGAIN) {
2111 /* We must have found a delegation */
2112 exception.retry = 1;
2113 continue;
2114 }
49f9a0fa
TM		 2115 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2116 continue;
2117 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2118 status, &exception));
2119 } while (exception.retry);
2120 return res;
2121}
2122
659bfcd6
TM		 2123static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2124 struct nfs_fattr *fattr, struct iattr *sattr,
2125 struct nfs4_state *state)
1da177e4 2126{
3e4f6290 2127 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2128 struct nfs_setattrargs arg = {
3e4f6290 2129 .fh = NFS_FH(inode),
1da177e4
LT		 2130 .iap = sattr,
2131 .server = server,
2132 .bitmask = server->attr_bitmask,
2133 };
2134 struct nfs_setattrres res = {
2135 .fattr = fattr,
2136 .server = server,
2137 };
2138 struct rpc_message msg = {
659bfcd6
TM		 2139 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2140 .rpc_argp = &arg,
2141 .rpc_resp = &res,
2142 .rpc_cred = cred,
1da177e4 2143 };
26e976a8 2144 unsigned long timestamp = jiffies;
65e4308d 2145 int status;
1da177e4 2146
0e574af1 2147 nfs_fattr_init(fattr);
1da177e4 2148
5d422301 2149 if (state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2150 struct nfs_lockowner lockowner = {
2151 .l_owner = current->files,
2152 .l_pid = current->tgid,
2153 };
4fc8796d 2154 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2155 &lockowner);
4fc8796d
TM		 2156 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2157 FMODE_WRITE)) {
3e4f6290 2158 /* Use that stateid */
08e9eac4 2159 } else
f597c537 2160 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2161
7c513058 2162 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2163 if (status == 0 && state != NULL)
2164 renew_lease(server, timestamp);
65e4308d 2165 return status;
1da177e4
LT		 2166}
2167
659bfcd6
TM		 2168static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2169 struct nfs_fattr *fattr, struct iattr *sattr,
2170 struct nfs4_state *state)
1da177e4 2171{
3e4f6290 2172 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2173 struct nfs4_exception exception = {
2174 .state = state,
3114ea7a 2175 .inode = inode,
a1d0b5ee 2176 };
1da177e4
LT		 2177 int err;
2178 do {
451146be
TM		 2179 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2180 switch (err) {
2181 case -NFS4ERR_OPENMODE:
2182 if (state && !(state->state & FMODE_WRITE)) {
2183 err = -EBADF;
2184 if (sattr->ia_valid & ATTR_OPEN)
2185 err = -EACCES;
2186 goto out;
2187 }
2188 }
2189 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2190 } while (exception.retry);
451146be 2191out:
1da177e4
LT		 2192 return err;
2193}
2194
2195struct nfs4_closedata {
2196 struct inode *inode;
2197 struct nfs4_state *state;
2198 struct nfs_closeargs arg;
2199 struct nfs_closeres res;
516a6af6 2200 struct nfs_fattr fattr;
26e976a8 2201 unsigned long timestamp;
f7e8917a
FI		 2202 bool roc;
2203 u32 roc_barrier;
1da177e4
LT		 2204};
2205
963d8fe5 2206static void nfs4_free_closedata(void *data)
9512135d 2207{
963d8fe5
TM		 2208 struct nfs4_closedata *calldata = data;
2209 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2210 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2211
f7e8917a
FI		 2212 if (calldata->roc)
2213 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2214 nfs4_put_open_state(calldata->state);
2215 nfs_free_seqid(calldata->arg.seqid);
9512135d 2216 nfs4_put_state_owner(sp);
322b2b90 2217 nfs_sb_deactive(sb);
9512135d
TM		 2218 kfree(calldata);
2219}
2220
88069f77
TM		 2221static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2222 fmode_t fmode)
2223{
2224 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2225 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2226 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2227 case FMODE_WRITE:
88069f77 2228 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2229 break;
2230 case FMODE_READ:
88069f77 2231 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2232 break;
2233 case 0:
2234 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2235 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2236 clear_bit(NFS_OPEN_STATE, &state->flags);
2237 }
88069f77
TM		 2238 spin_unlock(&state->owner->so_lock);
2239}
2240
963d8fe5 2241static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2242{
963d8fe5 2243 struct nfs4_closedata *calldata = data;
1da177e4 2244 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2245 struct nfs_server *server = NFS_SERVER(calldata->inode);
2246
a3ca5651 2247 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2248 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2249 return;
1da177e4
LT		 2250 /* hmm. we are done with the inode, and in the process of freeing
2251 * the state_owner. we keep this around to process errors
2252 */
1da177e4
LT		 2253 switch (task->tk_status) {
2254 case 0:
f7e8917a
FI		 2255 if (calldata->roc)
2256 pnfs_roc_set_barrier(state->inode,
2257 calldata->roc_barrier);
45328c35 2258 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2259 renew_lease(server, calldata->timestamp);
88069f77
TM		 2260 nfs4_close_clear_stateid_flags(state,
2261 calldata->arg.fmode);
1da177e4
LT		 2262 break;
2263 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2264 case -NFS4ERR_OLD_STATEID:
2265 case -NFS4ERR_BAD_STATEID:
1da177e4 2266 case -NFS4ERR_EXPIRED:
dc0b027d 2267 if (calldata->arg.fmode == 0)
9e33bed5 2268 break;
1da177e4 2269 default:
72211dbe
TM		 2270 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2271 rpc_restart_call_prepare(task);
1da177e4 2272 }
72211dbe 2273 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2274 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2275 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2276}
2277
4ce70ada 2278static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2279{
4ce70ada 2280 struct nfs4_closedata *calldata = data;
9512135d 2281 struct nfs4_state *state = calldata->state;
7fdab069 2282 struct inode *inode = calldata->inode;
88069f77 2283 int call_close = 0;
9512135d 2284
a3ca5651 2285 dprintk("%s: begin!\n", __func__);
963d8fe5 2286 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2287 goto out_wait;
003707c7 2288
88069f77
TM		 2289 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2290 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2291 spin_lock(&state->owner->so_lock);
003707c7 2292 /* Calculate the change in open mode */
e7616923 2293 if (state->n_rdwr == 0) {
003707c7 2294 if (state->n_rdonly == 0) {
88069f77
TM		 2295 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2296 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2297 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2298 }
2299 if (state->n_wronly == 0) {
88069f77
TM		 2300 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2301 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2302 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2303 }
e7616923 2304 }
5d422301
TM		 2305 if (!nfs4_valid_open_stateid(state))
2306 call_close = 0;
4cecb76f 2307 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2308
2309 if (!call_close) {
963d8fe5 2310 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2311 goto out_no_action;
9512135d 2312 }
88069f77 2313
f7e8917a 2314 if (calldata->arg.fmode == 0) {
88069f77 2315 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2316 if (calldata->roc &&
b9536ad5
AA		 2317 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2318 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2319 goto out_wait;
b9536ad5 2320 }
f7e8917a 2321 }
88069f77 2322
516a6af6 2323 nfs_fattr_init(calldata->res.fattr);
26e976a8 2324 calldata->timestamp = jiffies;
7fdab069 2325 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2326 &calldata->arg.seq_args,
2327 &calldata->res.seq_res,
2240a9e2
TM		 2328 task) != 0)
2329 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2330 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2331 return;
2332out_no_action:
2333 task->tk_action = NULL;
2334out_wait:
2335 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2336}
2337
963d8fe5 2338static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2339 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2340 .rpc_call_done = nfs4_close_done,
2341 .rpc_release = nfs4_free_closedata,
2342};
2343
1da177e4
LT		 2344/*
2345 * It is possible for data to be read/written from a mem-mapped file
2346 * after the sys_close call (which hits the vfs layer as a flush).
2347 * This means that we can't safely call nfsv4 close on a file until
2348 * the inode is cleared. This in turn means that we are not good
2349 * NFSv4 citizens - we do not indicate to the server to update the file's
2350 * share state even when we are done with one of the three share
2351 * stateid's in the inode.
2352 *
2353 * NOTE: Caller must be holding the sp->so_owner semaphore!
2354 */
1f7977c1 2355int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2356{
4a35bd41 2357 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2358 struct nfs4_closedata *calldata;
b39e625b
TM		 2359 struct nfs4_state_owner *sp = state->owner;
2360 struct rpc_task *task;
5138fde0
TM		 2361 struct rpc_message msg = {
2362 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2363 .rpc_cred = state->owner->so_cred,
2364 };
c970aa85
TM		 2365 struct rpc_task_setup task_setup_data = {
2366 .rpc_client = server->client,
5138fde0 2367 .rpc_message = &msg,
c970aa85 2368 .callback_ops = &nfs4_close_ops,
101070ca 2369 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2370 .flags = RPC_TASK_ASYNC,
2371 };
9512135d 2372 int status = -ENOMEM;
1da177e4 2373
8535b2be 2374 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2375 if (calldata == NULL)
9512135d 2376 goto out;
9d12b216 2377 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2378 calldata->inode = state->inode;
1da177e4 2379 calldata->state = state;
4a35bd41 2380 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2381 calldata->arg.stateid = &state->open_stateid;
1da177e4 2382 /* Serialization for the sequence id */
8535b2be 2383 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2384 if (calldata->arg.seqid == NULL)
2385 goto out_free_calldata;
dc0b027d 2386 calldata->arg.fmode = 0;
a65318bf 2387 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2388 calldata->res.fattr = &calldata->fattr;
c1d51931 2389 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2390 calldata->res.server = server;
1f7977c1 2391 calldata->roc = pnfs_roc(state->inode);
643168c2 2392 nfs_sb_active(calldata->inode->i_sb);
9512135d 2393
1174dd1f
TM		 2394 msg.rpc_argp = &calldata->arg;
2395 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2396 task_setup_data.callback_data = calldata;
2397 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2398 if (IS_ERR(task))
2399 return PTR_ERR(task);
a49c3c77
TM		 2400 status = 0;
2401 if (wait)
2402 status = rpc_wait_for_completion_task(task);
b39e625b 2403 rpc_put_task(task);
a49c3c77 2404 return status;
9512135d
TM		 2405out_free_calldata:
2406 kfree(calldata);
2407out:
b39e625b
TM		 2408 nfs4_put_open_state(state);
2409 nfs4_put_state_owner(sp);
9512135d 2410 return status;
1da177e4
LT		 2411}
2412
2b484297 2413static struct inode *
cd9a1c0e 2414nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2415{
1da177e4 2416 struct nfs4_state *state;
1da177e4 2417
565277f6 2418 /* Protect against concurrent sillydeletes */
82be417a
AA		 2419 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2420 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2421 if (IS_ERR(state))
2422 return ERR_CAST(state);
cd9a1c0e 2423 ctx->state = state;
f46e0bd3 2424 return igrab(state->inode);
1da177e4
LT		 2425}
2426
1185a552 2427static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2428{
2429 if (ctx->state == NULL)
2430 return;
2431 if (is_sync)
643168c2 2432 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2433 else
643168c2 2434 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2435}
1da177e4
LT		 2436
2437static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2438{
43652ad5
BH		 2439 struct nfs4_server_caps_arg args = {
2440 .fhandle = fhandle,
2441 };
1da177e4
LT		 2442 struct nfs4_server_caps_res res = {};
2443 struct rpc_message msg = {
2444 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2445 .rpc_argp = &args,
1da177e4
LT		 2446 .rpc_resp = &res,
2447 };
2448 int status;
2449
7c513058 2450 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2451 if (status == 0) {
2452 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2453 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2454 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2455 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2456 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2457 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2458 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2459 server->caps |= NFS_CAP_ACLS;
2460 if (res.has_links != 0)
2461 server->caps |= NFS_CAP_HARDLINKS;
2462 if (res.has_symlinks != 0)
2463 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2464 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2465 server->caps |= NFS_CAP_FILEID;
2466 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2467 server->caps |= NFS_CAP_MODE;
2468 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2469 server->caps |= NFS_CAP_NLINK;
2470 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2471 server->caps |= NFS_CAP_OWNER;
2472 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2473 server->caps |= NFS_CAP_OWNER_GROUP;
2474 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2475 server->caps |= NFS_CAP_ATIME;
2476 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2477 server->caps |= NFS_CAP_CTIME;
2478 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2479 server->caps |= NFS_CAP_MTIME;
2480
a65318bf
TM		 2481 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2482 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2483 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2484 server->acl_bitmask = res.acl_bitmask;
264e6351 2485 server->fh_expire_type = res.fh_expire_type;
1da177e4 2486 }
cccef3b9 2487
1da177e4
LT		 2488 return status;
2489}
2490
55a97593 2491int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2492{
2493 struct nfs4_exception exception = { };
2494 int err;
2495 do {
2496 err = nfs4_handle_exception(server,
2497 _nfs4_server_capabilities(server, fhandle),
2498 &exception);
2499 } while (exception.retry);
2500 return err;
2501}
2502
2503static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2504 struct nfs_fsinfo *info)
2505{
1da177e4
LT		 2506 struct nfs4_lookup_root_arg args = {
2507 .bitmask = nfs4_fattr_bitmap,
2508 };
2509 struct nfs4_lookup_res res = {
2510 .server = server,
0e574af1 2511 .fattr = info->fattr,
1da177e4
LT		 2512 .fh = fhandle,
2513 };
2514 struct rpc_message msg = {
2515 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2516 .rpc_argp = &args,
2517 .rpc_resp = &res,
2518 };
008f55d0 2519
0e574af1 2520 nfs_fattr_init(info->fattr);
7c513058 2521 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2522}
2523
2524static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2525 struct nfs_fsinfo *info)
2526{
2527 struct nfs4_exception exception = { };
2528 int err;
2529 do {
fb8a5ba8
BS		 2530 err = _nfs4_lookup_root(server, fhandle, info);
2531 switch (err) {
2532 case 0:
2533 case -NFS4ERR_WRONGSEC:
05e9cfb4 2534 goto out;
fb8a5ba8
BS		 2535 default:
2536 err = nfs4_handle_exception(server, err, &exception);
2537 }
1da177e4 2538 } while (exception.retry);
05e9cfb4 2539out:
1da177e4
LT		 2540 return err;
2541}
2542
8f70e95f
BS		 2543static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2544 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2545{
2546 struct rpc_auth *auth;
2547 int ret;
2548
2549 auth = rpcauth_create(flavor, server->client);
e8d920c5 2550 if (IS_ERR(auth)) {
75bc8821 2551 ret = -EACCES;
8f70e95f
BS		 2552 goto out;
2553 }
2554 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2555out:
2556 return ret;
2557}
2558
9a744ba3
CL		 2559/*
2560 * Retry pseudoroot lookup with various security flavors. We do this when:
2561 *
2562 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2563 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2564 *
2565 * Returns zero on success, or a negative NFS4ERR value, or a
2566 * negative errno value.
2567 */
801a16dc 2568static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2569 struct nfs_fsinfo *info)
1da177e4 2570{
9a744ba3
CL		 2571 /* Per 3530bis 15.33.5 */
2572 static const rpc_authflavor_t flav_array[] = {
2573 RPC_AUTH_GSS_KRB5P,
2574 RPC_AUTH_GSS_KRB5I,
2575 RPC_AUTH_GSS_KRB5,
c4eafe11 2576 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2577 RPC_AUTH_NULL,
2578 };
2579 int status = -EPERM;
2580 size_t i;
6a1a1e34 2581
9a744ba3 2582 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2583 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2584 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2585 continue;
2586 break;
8f70e95f 2587 }
9a744ba3 2588
fb8a5ba8
BS		 2589 /*
2590 * -EACCESS could mean that the user doesn't have correct permissions
2591 * to access the mount. It could also mean that we tried to mount
2592 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2593 * existing mount programs don't handle -EACCES very well so it should
2594 * be mapped to -EPERM instead.
2595 */
2596 if (status == -EACCES)
2597 status = -EPERM;
801a16dc
BS		 2598 return status;
2599}
2600
2ed4b95b
CL		 2601static int nfs4_do_find_root_sec(struct nfs_server *server,
2602 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2603{
2604 int mv = server->nfs_client->cl_minorversion;
2605 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2606}
2607
2608/**
2609 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2610 * @server: initialized nfs_server handle
2611 * @fhandle: we fill in the pseudo-fs root file handle
2612 * @info: we fill in an FSINFO struct
2613 *
2614 * Returns zero on success, or a negative errno.
801a16dc 2615 */
3028eb2b
BS		 2616int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2617 struct nfs_fsinfo *info)
801a16dc 2618{
2ed4b95b
CL		 2619 int status;
2620
2621 status = nfs4_lookup_root(server, fhandle, info);
2622 if ((status == -NFS4ERR_WRONGSEC) &&
2623 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2624 status = nfs4_do_find_root_sec(server, fhandle, info);
2625
1da177e4
LT		 2626 if (status == 0)
2627 status = nfs4_server_capabilities(server, fhandle);
2628 if (status == 0)
2629 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2630
c12e87f4 2631 return nfs4_map_errors(status);
1da177e4
LT		 2632}
2633
bae36241
BS		 2634static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2635 struct nfs_fsinfo *info)
2636{
2637 int error;
2638 struct nfs_fattr *fattr = info->fattr;
2639
2640 error = nfs4_server_capabilities(server, mntfh);
2641 if (error < 0) {
2642 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2643 return error;
2644 }
2645
2646 error = nfs4_proc_getattr(server, mntfh, fattr);
2647 if (error < 0) {
2648 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2649 return error;
2650 }
2651
2652 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2653 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2654 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2655
2656 return error;
2657}
2658
6b97fd3d
MN		 2659/*
2660 * Get locations and (maybe) other attributes of a referral.
2661 * Note that we'll actually follow the referral later when
2662 * we detect fsid mismatch in inode revalidation
2663 */
f05d147f
BS		 2664static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2665 const struct qstr *name, struct nfs_fattr *fattr,
2666 struct nfs_fh *fhandle)
6b97fd3d
MN		 2667{
2668 int status = -ENOMEM;
2669 struct page *page = NULL;
2670 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2671
2672 page = alloc_page(GFP_KERNEL);
2673 if (page == NULL)
2674 goto out;
2675 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2676 if (locations == NULL)
2677 goto out;
2678
f05d147f 2679 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2680 if (status != 0)
2681 goto out;
2682 /* Make sure server returned a different fsid for the referral */
2683 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2684 dprintk("%s: server did not return a different fsid for"
2685 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2686 status = -EIO;
2687 goto out;
2688 }
533eb461
AA		 2689 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2690 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2691
533eb461 2692 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2693 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2694 memset(fhandle, 0, sizeof(struct nfs_fh));
2695out:
2696 if (page)
2697 __free_page(page);
5d7ca35a 2698 kfree(locations);
6b97fd3d
MN		 2699 return status;
2700}
2701
1da177e4
LT		 2702static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2703{
2704 struct nfs4_getattr_arg args = {
2705 .fh = fhandle,
2706 .bitmask = server->attr_bitmask,
2707 };
2708 struct nfs4_getattr_res res = {
2709 .fattr = fattr,
2710 .server = server,
2711 };
2712 struct rpc_message msg = {
2713 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2714 .rpc_argp = &args,
2715 .rpc_resp = &res,
2716 };
2717
0e574af1 2718 nfs_fattr_init(fattr);
7c513058 2719 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2720}
2721
2722static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2723{
2724 struct nfs4_exception exception = { };
2725 int err;
2726 do {
2727 err = nfs4_handle_exception(server,
2728 _nfs4_proc_getattr(server, fhandle, fattr),
2729 &exception);
2730 } while (exception.retry);
2731 return err;
2732}
2733
2734/*
2735 * The file is not closed if it is opened due to the a request to change
2736 * the size of the file. The open call will not be needed once the
2737 * VFS layer lookup-intents are implemented.
2738 *
2739 * Close is called when the inode is destroyed.
2740 * If we haven't opened the file for O_WRONLY, we
2741 * need to in the size_change case to obtain a stateid.
2742 *
2743 * Got race?
2744 * Because OPEN is always done by name in nfsv4, it is
2745 * possible that we opened a different file by the same
2746 * name. We can recognize this race condition, but we
2747 * can't do anything about it besides returning an error.
2748 *
2749 * This will be fixed with VFS changes (lookup-intent).
2750 */
2751static int
2752nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2753 struct iattr *sattr)
2754{
08e9eac4 2755 struct inode *inode = dentry->d_inode;
659bfcd6 2756 struct rpc_cred *cred = NULL;
d530838b 2757 struct nfs4_state *state = NULL;
1da177e4
LT		 2758 int status;
2759
8a1636c4 2760 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2761 pnfs_commit_and_return_layout(inode);
8a1636c4 2762
0e574af1 2763 nfs_fattr_init(fattr);
1da177e4 2764
2669940d
AA		 2765 /* Deal with open(O_TRUNC) */
2766 if (sattr->ia_valid & ATTR_OPEN)
2767 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2768
2769 /* Optimization: if the end result is no change, don't RPC */
2770 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2771 return 0;
2772
d530838b 2773 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2774 if (sattr->ia_valid & ATTR_FILE) {
2775 struct nfs_open_context *ctx;
2776
2777 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2778 if (ctx) {
2779 cred = ctx->cred;
2780 state = ctx->state;
2781 }
659bfcd6 2782 }
08e9eac4 2783
659bfcd6 2784 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2785 if (status == 0)
2786 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2787 return status;
2788}
2789
0c2e53f1
TM		 2790static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2791 const struct qstr *name, struct nfs_fh *fhandle,
2792 struct nfs_fattr *fattr)
2b3de441 2793{
0c2e53f1 2794 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2795 int status;
2796 struct nfs4_lookup_arg args = {
2797 .bitmask = server->attr_bitmask,
0c2e53f1 2798 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2799 .name = name,
2800 };
2801 struct nfs4_lookup_res res = {
2802 .server = server,
2803 .fattr = fattr,
2804 .fh = fhandle,
2805 };
2806 struct rpc_message msg = {
2807 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2808 .rpc_argp = &args,
2809 .rpc_resp = &res,
2810 };
2811
2812 nfs_fattr_init(fattr);
2813
1da177e4 2814 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2815 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2816 dprintk("NFS reply lookup: %d\n", status);
2817 return status;
2818}
2819
72de53ec 2820static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2821{
7ebb9315 2822 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2823 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2824 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2825 fattr->nlink = 2;
2826}
2827
72de53ec
BS		 2828static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2829 struct qstr *name, struct nfs_fh *fhandle,
2830 struct nfs_fattr *fattr)
1da177e4
LT		 2831{
2832 struct nfs4_exception exception = { };
72de53ec 2833 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2834 int err;
2835 do {
72de53ec
BS		 2836 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2837 switch (err) {
08ef7bd3 2838 case -NFS4ERR_BADNAME:
72de53ec
BS		 2839 err = -ENOENT;
2840 goto out;
0c2e53f1 2841 case -NFS4ERR_MOVED:
f05d147f 2842 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2843 goto out;
0c2e53f1 2844 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2845 err = -EPERM;
2846 if (client != *clnt)
2847 goto out;
2848
2849 client = nfs4_create_sec_client(client, dir, name);
2850 if (IS_ERR(client))
2851 return PTR_ERR(client);
2852
2853 exception.retry = 1;
2854 break;
2855 default:
2856 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2857 }
1da177e4 2858 } while (exception.retry);
72de53ec
BS		 2859
2860out:
2861 if (err == 0)
2862 *clnt = client;
2863 else if (client != *clnt)
2864 rpc_shutdown_client(client);
2865
1da177e4
LT		 2866 return err;
2867}
2868
80a16b21 2869static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2870 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2871{
2872 int status;
2873 struct rpc_clnt *client = NFS_CLIENT(dir);
2874
2875 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2876 if (client != NFS_CLIENT(dir)) {
2877 rpc_shutdown_client(client);
2878 nfs_fixup_secinfo_attributes(fattr);
2879 }
2880 return status;
2881}
2882
f05d147f
BS		 2883struct rpc_clnt *
2884nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2885 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2886{
2887 int status;
2888 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2889
2890 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2891 if (status < 0) {
2892 rpc_shutdown_client(client);
2893 return ERR_PTR(status);
2894 }
2895 return client;
2896}
2897
1da177e4
LT		 2898static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2899{
76b32999 2900 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2901 struct nfs4_accessargs args = {
2902 .fh = NFS_FH(inode),
a4980e78 2903 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2904 };
2905 struct nfs4_accessres res = {
2906 .server = server,
1da177e4 2907 };
1da177e4
LT		 2908 struct rpc_message msg = {
2909 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2910 .rpc_argp = &args,
2911 .rpc_resp = &res,
2912 .rpc_cred = entry->cred,
2913 };
2914 int mode = entry->mask;
2915 int status;
2916
2917 /*
2918 * Determine which access bits we want to ask for...
2919 */
2920 if (mode & MAY_READ)
2921 args.access |= NFS4_ACCESS_READ;
2922 if (S_ISDIR(inode->i_mode)) {
2923 if (mode & MAY_WRITE)
2924 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2925 if (mode & MAY_EXEC)
2926 args.access |= NFS4_ACCESS_LOOKUP;
2927 } else {
2928 if (mode & MAY_WRITE)
2929 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2930 if (mode & MAY_EXEC)
2931 args.access |= NFS4_ACCESS_EXECUTE;
2932 }
c407d41a
TM		 2933
2934 res.fattr = nfs_alloc_fattr();
2935 if (res.fattr == NULL)
2936 return -ENOMEM;
2937
7c513058 2938 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2939 if (!status) {
6168f62c 2940 nfs_access_set_mask(entry, res.access);
c407d41a 2941 nfs_refresh_inode(inode, res.fattr);
1da177e4 2942 }
c407d41a 2943 nfs_free_fattr(res.fattr);
1da177e4
LT		 2944 return status;
2945}
2946
2947static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2948{
2949 struct nfs4_exception exception = { };
2950 int err;
2951 do {
2952 err = nfs4_handle_exception(NFS_SERVER(inode),
2953 _nfs4_proc_access(inode, entry),
2954 &exception);
2955 } while (exception.retry);
2956 return err;
2957}
2958
2959/*
2960 * TODO: For the time being, we don't try to get any attributes
2961 * along with any of the zero-copy operations READ, READDIR,
2962 * READLINK, WRITE.
2963 *
2964 * In the case of the first three, we want to put the GETATTR
2965 * after the read-type operation -- this is because it is hard
2966 * to predict the length of a GETATTR response in v4, and thus
2967 * align the READ data correctly. This means that the GETATTR
2968 * may end up partially falling into the page cache, and we should
2969 * shift it into the 'tail' of the xdr_buf before processing.
2970 * To do this efficiently, we need to know the total length
2971 * of data received, which doesn't seem to be available outside
2972 * of the RPC layer.
2973 *
2974 * In the case of WRITE, we also want to put the GETATTR after
2975 * the operation -- in this case because we want to make sure
140150db 2976 * we get the post-operation mtime and size.
1da177e4
LT		 2977 *
2978 * Both of these changes to the XDR layer would in fact be quite
2979 * minor, but I decided to leave them for a subsequent patch.
2980 */
2981static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2982 unsigned int pgbase, unsigned int pglen)
2983{
2984 struct nfs4_readlink args = {
2985 .fh = NFS_FH(inode),
2986 .pgbase = pgbase,
2987 .pglen = pglen,
2988 .pages = &page,
2989 };
f50c7000 2990 struct nfs4_readlink_res res;
1da177e4
LT		 2991 struct rpc_message msg = {
2992 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2993 .rpc_argp = &args,
f50c7000 2994 .rpc_resp = &res,
1da177e4
LT		 2995 };
2996
7c513058 2997 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2998}
2999
3000static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3001 unsigned int pgbase, unsigned int pglen)
3002{
3003 struct nfs4_exception exception = { };
3004 int err;
3005 do {
3006 err = nfs4_handle_exception(NFS_SERVER(inode),
3007 _nfs4_proc_readlink(inode, page, pgbase, pglen),
3008 &exception);
3009 } while (exception.retry);
3010 return err;
3011}
3012
1da177e4 3013/*
8867fe58 3014 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3015 */
1da177e4
LT		 3016static int
3017nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3018 int flags)
1da177e4 3019{
8867fe58 3020 struct nfs_open_context *ctx;
1da177e4 3021 struct nfs4_state *state;
1da177e4
LT		 3022 int status = 0;
3023
8867fe58
MS		 3024 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3025 if (IS_ERR(ctx))
3026 return PTR_ERR(ctx);
3027
a8a5da99 3028 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 3029 state = nfs4_do_open(dir, dentry, ctx->mode,
3030 flags, sattr, ctx->cred,
3031 &ctx->mdsthreshold);
d4d9cdcb 3032 d_drop(dentry);
1da177e4
LT		 3033 if (IS_ERR(state)) {
3034 status = PTR_ERR(state);
c0204fd2 3035 goto out;
1da177e4 3036 }
d4d9cdcb 3037 d_add(dentry, igrab(state->inode));
d75340cc 3038 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 3039 ctx->state = state;
1da177e4 3040out:
8867fe58 3041 put_nfs_open_context(ctx);
1da177e4
LT		 3042 return status;
3043}
3044
3045static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3046{
16e42959 3047 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3048 struct nfs_removeargs args = {
1da177e4 3049 .fh = NFS_FH(dir),
26fe5750 3050 .name = *name,
16e42959 3051 };
4fdc17b2 3052 struct nfs_removeres res = {
16e42959 3053 .server = server,
1da177e4 3054 };
1da177e4 3055 struct rpc_message msg = {
4fdc17b2
TM		 3056 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3057 .rpc_argp = &args,
3058 .rpc_resp = &res,
1da177e4 3059 };
778d2817 3060 int status;
1da177e4 3061
7c513058 3062 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3063 if (status == 0)
16e42959 3064 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3065 return status;
3066}
3067
3068static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3069{
3070 struct nfs4_exception exception = { };
3071 int err;
3072 do {
3073 err = nfs4_handle_exception(NFS_SERVER(dir),
3074 _nfs4_proc_remove(dir, name),
3075 &exception);
3076 } while (exception.retry);
3077 return err;
3078}
3079
e4eff1a6 3080static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3081{
e4eff1a6
TM		 3082 struct nfs_server *server = NFS_SERVER(dir);
3083 struct nfs_removeargs *args = msg->rpc_argp;
3084 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3085
e4eff1a6 3086 res->server = server;
1da177e4 3087 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3088 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 3089}
3090
34e137cc
BS		 3091static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3092{
d9afbd1b
TM		 3093 nfs4_setup_sequence(NFS_SERVER(data->dir),
3094 &data->args.seq_args,
3095 &data->res.seq_res,
3096 task);
1da177e4
LT		 3097}
3098
e4eff1a6 3099static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3100{
e4eff1a6
TM		 3101 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3102
14516c3a
TM		 3103 if (!nfs4_sequence_done(task, &res->seq_res))
3104 return 0;
9e33bed5 3105 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3106 return 0;
3107 update_changeattr(dir, &res->cinfo);
e4eff1a6 3108 return 1;
1da177e4
LT		 3109}
3110
d3d4152a
JL		 3111static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3112{
3113 struct nfs_server *server = NFS_SERVER(dir);
3114 struct nfs_renameargs *arg = msg->rpc_argp;
3115 struct nfs_renameres *res = msg->rpc_resp;
3116
3117 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3118 res->server = server;
9d12b216 3119 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3120}
3121
c6bfa1a1
BS		 3122static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3123{
d9afbd1b
TM		 3124 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3125 &data->args.seq_args,
3126 &data->res.seq_res,
3127 task);
d3d4152a
JL		 3128}
3129
3130static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3131 struct inode *new_dir)
3132{
3133 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3134
3135 if (!nfs4_sequence_done(task, &res->seq_res))
3136 return 0;
3137 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3138 return 0;
3139
3140 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3141 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3142 return 1;
3143}
3144
1da177e4
LT		 3145static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3146 struct inode *new_dir, struct qstr *new_name)
3147{
6caf2c82 3148 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3149 struct nfs_renameargs arg = {
1da177e4
LT		 3150 .old_dir = NFS_FH(old_dir),
3151 .new_dir = NFS_FH(new_dir),
3152 .old_name = old_name,
3153 .new_name = new_name,
6caf2c82 3154 };
e8582a8b 3155 struct nfs_renameres res = {
6caf2c82 3156 .server = server,
1da177e4 3157 };
1da177e4
LT		 3158 struct rpc_message msg = {
3159 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3160 .rpc_argp = &arg,
3161 .rpc_resp = &res,
3162 };
011fff72 3163 int status = -ENOMEM;
1da177e4 3164
7c513058 3165 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3166 if (!status) {
3167 update_changeattr(old_dir, &res.old_cinfo);
3168 update_changeattr(new_dir, &res.new_cinfo);
3169 }
3170 return status;
3171}
3172
3173static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3174 struct inode *new_dir, struct qstr *new_name)
3175{
3176 struct nfs4_exception exception = { };
3177 int err;
3178 do {
3179 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3180 _nfs4_proc_rename(old_dir, old_name,
3181 new_dir, new_name),
3182 &exception);
3183 } while (exception.retry);
3184 return err;
3185}
3186
3187static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3188{
91ba2eee 3189 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3190 struct nfs4_link_arg arg = {
3191 .fh = NFS_FH(inode),
3192 .dir_fh = NFS_FH(dir),
3193 .name = name,
91ba2eee
TM		 3194 .bitmask = server->attr_bitmask,
3195 };
91ba2eee
TM		 3196 struct nfs4_link_res res = {
3197 .server = server,
1da177e4 3198 };
1da177e4
LT		 3199 struct rpc_message msg = {
3200 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3201 .rpc_argp = &arg,
91ba2eee 3202 .rpc_resp = &res,
1da177e4 3203 };
136f2627
TM		 3204 int status = -ENOMEM;
3205
3206 res.fattr = nfs_alloc_fattr();
778d2817 3207 if (res.fattr == NULL)
136f2627 3208 goto out;
1da177e4 3209
7c513058 3210 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3211 if (!status) {
3212 update_changeattr(dir, &res.cinfo);
73a3d07c 3213 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3214 }
136f2627 3215out:
136f2627 3216 nfs_free_fattr(res.fattr);
1da177e4
LT		 3217 return status;
3218}
3219
3220static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3221{
3222 struct nfs4_exception exception = { };
3223 int err;
3224 do {
3225 err = nfs4_handle_exception(NFS_SERVER(inode),
3226 _nfs4_proc_link(inode, dir, name),
3227 &exception);
3228 } while (exception.retry);
3229 return err;
3230}
3231
57dc9a57
TM		 3232struct nfs4_createdata {
3233 struct rpc_message msg;
3234 struct nfs4_create_arg arg;
3235 struct nfs4_create_res res;
3236 struct nfs_fh fh;
3237 struct nfs_fattr fattr;
57dc9a57
TM		 3238};
3239
3240static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3241 struct qstr *name, struct iattr *sattr, u32 ftype)
3242{
3243 struct nfs4_createdata *data;
3244
3245 data = kzalloc(sizeof(*data), GFP_KERNEL);
3246 if (data != NULL) {
3247 struct nfs_server *server = NFS_SERVER(dir);
3248
3249 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3250 data->msg.rpc_argp = &data->arg;
3251 data->msg.rpc_resp = &data->res;
3252 data->arg.dir_fh = NFS_FH(dir);
3253 data->arg.server = server;
3254 data->arg.name = name;
3255 data->arg.attrs = sattr;
3256 data->arg.ftype = ftype;
3257 data->arg.bitmask = server->attr_bitmask;
3258 data->res.server = server;
3259 data->res.fh = &data->fh;
3260 data->res.fattr = &data->fattr;
57dc9a57 3261 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3262 }
3263 return data;
3264}
3265
3266static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3267{
7c513058 3268 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3269 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3270 if (status == 0) {
3271 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3272 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3273 }
3274 return status;
3275}
3276
3277static void nfs4_free_createdata(struct nfs4_createdata *data)
3278{
3279 kfree(data);
3280}
3281
4f390c15 3282static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3283 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3284{
57dc9a57
TM		 3285 struct nfs4_createdata *data;
3286 int status = -ENAMETOOLONG;
1da177e4 3287
94a6d753 3288 if (len > NFS4_MAXPATHLEN)
57dc9a57 3289 goto out;
4f390c15 3290
57dc9a57
TM		 3291 status = -ENOMEM;
3292 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3293 if (data == NULL)
3294 goto out;
3295
3296 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3297 data->arg.u.symlink.pages = &page;
3298 data->arg.u.symlink.len = len;
1da177e4 3299
57dc9a57
TM		 3300 status = nfs4_do_create(dir, dentry, data);
3301
3302 nfs4_free_createdata(data);
3303out:
1da177e4
LT		 3304 return status;
3305}
3306
4f390c15 3307static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3308 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3309{
3310 struct nfs4_exception exception = { };
3311 int err;
3312 do {
3313 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3314 _nfs4_proc_symlink(dir, dentry, page,
3315 len, sattr),
1da177e4
LT		 3316 &exception);
3317 } while (exception.retry);
3318 return err;
3319}
3320
3321static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3322 struct iattr *sattr)
3323{
57dc9a57
TM		 3324 struct nfs4_createdata *data;
3325 int status = -ENOMEM;
1da177e4 3326
57dc9a57
TM		 3327 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3328 if (data == NULL)
3329 goto out;
3330
3331 status = nfs4_do_create(dir, dentry, data);
3332
3333 nfs4_free_createdata(data);
3334out:
1da177e4
LT		 3335 return status;
3336}
3337
3338static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3339 struct iattr *sattr)
3340{
3341 struct nfs4_exception exception = { };
3342 int err;
a8a5da99
AK		 3343
3344 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3345 do {
3346 err = nfs4_handle_exception(NFS_SERVER(dir),
3347 _nfs4_proc_mkdir(dir, dentry, sattr),
3348 &exception);
3349 } while (exception.retry);
3350 return err;
3351}
3352
3353static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3354 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3355{
3356 struct inode *dir = dentry->d_inode;
3357 struct nfs4_readdir_arg args = {
3358 .fh = NFS_FH(dir),
56e4ebf8 3359 .pages = pages,
1da177e4
LT		 3360 .pgbase = 0,
3361 .count = count,
96d25e53 3362 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3363 .plus = plus,
1da177e4
LT		 3364 };
3365 struct nfs4_readdir_res res;
3366 struct rpc_message msg = {
3367 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3368 .rpc_argp = &args,
3369 .rpc_resp = &res,
3370 .rpc_cred = cred,
3371 };
3372 int status;
3373
3110ff80 3374 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3375 dentry->d_parent->d_name.name,
3376 dentry->d_name.name,
3377 (unsigned long long)cookie);
c3f52af3 3378 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3379 res.pgbase = args.pgbase;
7c513058 3380 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3381 if (status >= 0) {
c3f52af3 3382 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3383 status += args.pgbase;
3384 }
c4812998
TM		 3385
3386 nfs_invalidate_atime(dir);
3387
3110ff80 3388 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3389 return status;
3390}
3391
3392static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3393 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3394{
3395 struct nfs4_exception exception = { };
3396 int err;
3397 do {
3398 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3399 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3400 pages, count, plus),
1da177e4
LT		 3401 &exception);
3402 } while (exception.retry);
3403 return err;
3404}
3405
3406static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3407 struct iattr *sattr, dev_t rdev)
3408{
57dc9a57
TM		 3409 struct nfs4_createdata *data;
3410 int mode = sattr->ia_mode;
3411 int status = -ENOMEM;
1da177e4 3412
57dc9a57
TM		 3413 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3414 if (data == NULL)
3415 goto out;
3416
1da177e4 3417 if (S_ISFIFO(mode))
57dc9a57 3418 data->arg.ftype = NF4FIFO;
1da177e4 3419 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3420 data->arg.ftype = NF4BLK;
3421 data->arg.u.device.specdata1 = MAJOR(rdev);
3422 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3423 }
3424 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3425 data->arg.ftype = NF4CHR;
3426 data->arg.u.device.specdata1 = MAJOR(rdev);
3427 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3428 } else if (!S_ISSOCK(mode)) {
3429 status = -EINVAL;
3430 goto out_free;
1da177e4 3431 }
1da177e4 3432
57dc9a57 3433 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3434out_free:
57dc9a57
TM		 3435 nfs4_free_createdata(data);
3436out:
1da177e4
LT		 3437 return status;
3438}
3439
3440static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3441 struct iattr *sattr, dev_t rdev)
3442{
3443 struct nfs4_exception exception = { };
3444 int err;
a8a5da99
AK		 3445
3446 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3447 do {
3448 err = nfs4_handle_exception(NFS_SERVER(dir),
3449 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3450 &exception);
3451 } while (exception.retry);
3452 return err;
3453}
3454
3455static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3456 struct nfs_fsstat *fsstat)
3457{
3458 struct nfs4_statfs_arg args = {
3459 .fh = fhandle,
3460 .bitmask = server->attr_bitmask,
3461 };
24ad148a
BH		 3462 struct nfs4_statfs_res res = {
3463 .fsstat = fsstat,
3464 };
1da177e4
LT		 3465 struct rpc_message msg = {
3466 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3467 .rpc_argp = &args,
24ad148a 3468 .rpc_resp = &res,
1da177e4
LT		 3469 };
3470
0e574af1 3471 nfs_fattr_init(fsstat->fattr);
7c513058 3472 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3473}
3474
3475static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3476{
3477 struct nfs4_exception exception = { };
3478 int err;
3479 do {
3480 err = nfs4_handle_exception(server,
3481 _nfs4_proc_statfs(server, fhandle, fsstat),
3482 &exception);
3483 } while (exception.retry);
3484 return err;
3485}
3486
3487static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3488 struct nfs_fsinfo *fsinfo)
3489{
3490 struct nfs4_fsinfo_arg args = {
3491 .fh = fhandle,
3492 .bitmask = server->attr_bitmask,
3493 };
3dda5e43
BH		 3494 struct nfs4_fsinfo_res res = {
3495 .fsinfo = fsinfo,
3496 };
1da177e4
LT		 3497 struct rpc_message msg = {
3498 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3499 .rpc_argp = &args,
3dda5e43 3500 .rpc_resp = &res,
1da177e4
LT		 3501 };
3502
7c513058 3503 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3504}
3505
3506static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3507{
3508 struct nfs4_exception exception = { };
83ca7f5a 3509 unsigned long now = jiffies;
1da177e4
LT		 3510 int err;
3511
3512 do {
83ca7f5a
CL		 3513 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
3514 if (err == 0) {
3515 struct nfs_client *clp = server->nfs_client;
3516
3517 spin_lock(&clp->cl_lock);
3518 clp->cl_lease_time = fsinfo->lease_time * HZ;
3519 clp->cl_last_renewal = now;
3520 spin_unlock(&clp->cl_lock);
3521 break;
3522 }
3523 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3524 } while (exception.retry);
3525 return err;
3526}
3527
3528static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3529{
e38eb650
BS		 3530 int error;
3531
0e574af1 3532 nfs_fattr_init(fsinfo->fattr);
e38eb650 3533 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3534 if (error == 0) {
3535 /* block layout checks this! */
3536 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3537 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3538 }
e38eb650
BS		 3539
3540 return error;
1da177e4
LT		 3541}
3542
3543static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3544 struct nfs_pathconf *pathconf)
3545{
3546 struct nfs4_pathconf_arg args = {
3547 .fh = fhandle,
3548 .bitmask = server->attr_bitmask,
3549 };
d45b2989
BH		 3550 struct nfs4_pathconf_res res = {
3551 .pathconf = pathconf,
3552 };
1da177e4
LT		 3553 struct rpc_message msg = {
3554 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3555 .rpc_argp = &args,
d45b2989 3556 .rpc_resp = &res,
1da177e4
LT		 3557 };
3558
3559 /* None of the pathconf attributes are mandatory to implement */
3560 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3561 memset(pathconf, 0, sizeof(*pathconf));
3562 return 0;
3563 }
3564
0e574af1 3565 nfs_fattr_init(pathconf->fattr);
7c513058 3566 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3567}
3568
3569static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3570 struct nfs_pathconf *pathconf)
3571{
3572 struct nfs4_exception exception = { };
3573 int err;
3574
3575 do {
3576 err = nfs4_handle_exception(server,
3577 _nfs4_proc_pathconf(server, fhandle, pathconf),
3578 &exception);
3579 } while (exception.retry);
3580 return err;
3581}
3582
5521abfd 3583int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3584 const struct nfs_open_context *ctx,
3585 const struct nfs_lock_context *l_ctx,
3586 fmode_t fmode)
3587{
3588 const struct nfs_lockowner *lockowner = NULL;
3589
3590 if (l_ctx != NULL)
3591 lockowner = &l_ctx->lockowner;
5521abfd 3592 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3593}
3594EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3595
5521abfd
TM		 3596static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3597 const struct nfs_open_context *ctx,
3598 const struct nfs_lock_context *l_ctx,
3599 fmode_t fmode)
3600{
3601 nfs4_stateid current_stateid;
3602
3603 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3604 return false;
3605 return nfs4_stateid_match(stateid, &current_stateid);
3606}
3607
3608static bool nfs4_error_stateid_expired(int err)
3609{
3610 switch (err) {
3611 case -NFS4ERR_DELEG_REVOKED:
3612 case -NFS4ERR_ADMIN_REVOKED:
3613 case -NFS4ERR_BAD_STATEID:
3614 case -NFS4ERR_STALE_STATEID:
3615 case -NFS4ERR_OLD_STATEID:
3616 case -NFS4ERR_OPENMODE:
3617 case -NFS4ERR_EXPIRED:
3618 return true;
3619 }
3620 return false;
3621}
3622
d20581aa
BH		 3623void __nfs4_read_done_cb(struct nfs_read_data *data)
3624{
cd841605 3625 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3626}
3627
cbdabc7f 3628static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3629{
cd841605 3630 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3631
9e33bed5 3632 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3633 rpc_restart_call_prepare(task);
ec06c096 3634 return -EAGAIN;
1da177e4 3635 }
8850df99 3636
d20581aa 3637 __nfs4_read_done_cb(data);
1da177e4 3638 if (task->tk_status > 0)
ec06c096
TM		 3639 renew_lease(server, data->timestamp);
3640 return 0;
1da177e4
LT		 3641}
3642
5521abfd
TM		 3643static bool nfs4_read_stateid_changed(struct rpc_task *task,
3644 struct nfs_readargs *args)
3645{
3646
3647 if (!nfs4_error_stateid_expired(task->tk_status) ||
3648 nfs4_stateid_is_current(&args->stateid,
3649 args->context,
3650 args->lock_context,
3651 FMODE_READ))
3652 return false;
3653 rpc_restart_call_prepare(task);
3654 return true;
3655}
3656
cbdabc7f
AA		 3657static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3658{
3659
3660 dprintk("--> %s\n", __func__);
3661
3662 if (!nfs4_sequence_done(task, &data->res.seq_res))
3663 return -EAGAIN;
5521abfd
TM		 3664 if (nfs4_read_stateid_changed(task, &data->args))
3665 return -EAGAIN;
d20581aa
BH		 3666 return data->read_done_cb ? data->read_done_cb(task, data) :
3667 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3668}
3669
bdc7f021 3670static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3671{
1da177e4 3672 data->timestamp = jiffies;
cbdabc7f 3673 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3674 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3675 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3676}
3677
ea7c3303
BS		 3678static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3679{
9b206149 3680 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3681 &data->args.seq_args,
3682 &data->res.seq_res,
9b206149
TM		 3683 task))
3684 return;
3685 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3686 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3687}
3688
b029bc9b 3689static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3690{
cd841605 3691 struct inode *inode = data->header->inode;
1da177e4 3692
9e33bed5 3693 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3694 rpc_restart_call_prepare(task);
788e7a89 3695 return -EAGAIN;
1da177e4 3696 }
4f9838c7 3697 if (task->tk_status >= 0) {
1da177e4 3698 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3699 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3700 }
788e7a89 3701 return 0;
1da177e4
LT		 3702}
3703
5521abfd
TM		 3704static bool nfs4_write_stateid_changed(struct rpc_task *task,
3705 struct nfs_writeargs *args)
3706{
3707
3708 if (!nfs4_error_stateid_expired(task->tk_status) ||
3709 nfs4_stateid_is_current(&args->stateid,
3710 args->context,
3711 args->lock_context,
3712 FMODE_WRITE))
3713 return false;
3714 rpc_restart_call_prepare(task);
3715 return true;
3716}
3717
b029bc9b
FI		 3718static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3719{
3720 if (!nfs4_sequence_done(task, &data->res.seq_res))
3721 return -EAGAIN;
5521abfd
TM		 3722 if (nfs4_write_stateid_changed(task, &data->args))
3723 return -EAGAIN;
d20581aa
BH		 3724 return data->write_done_cb ? data->write_done_cb(task, data) :
3725 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3726}
3727
5a37f851
TM		 3728static
3729bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3730{
5a37f851
TM		 3731 const struct nfs_pgio_header *hdr = data->header;
3732
3733 /* Don't request attributes for pNFS or O_DIRECT writes */
3734 if (data->ds_clp != NULL || hdr->dreq != NULL)
3735 return false;
3736 /* Otherwise, request attributes if and only if we don't hold
3737 * a delegation
3738 */
011e2a7f 3739 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3740}
a69aef14 3741
bdc7f021 3742static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3743{
cd841605 3744 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3745
5a37f851 3746 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3747 data->args.bitmask = NULL;
3748 data->res.fattr = NULL;
3749 } else
3750 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3751
b029bc9b
FI		 3752 if (!data->write_done_cb)
3753 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3754 data->res.server = server;
1da177e4
LT		 3755 data->timestamp = jiffies;
3756
bdc7f021 3757 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3758 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3759}
3760
c6cb80d0
BS		 3761static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3762{
9b206149 3763 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3764 &data->args.seq_args,
3765 &data->res.seq_res,
9b206149
TM		 3766 task))
3767 return;
3768 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3769 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 3770}
3771
0b7c0153 3772static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3773{
d9afbd1b
TM		 3774 nfs4_setup_sequence(NFS_SERVER(data->inode),
3775 &data->args.seq_args,
3776 &data->res.seq_res,
3777 task);
1da177e4
LT		 3778}
3779
0b7c0153 3780static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3781{
1da177e4 3782 struct inode *inode = data->inode;
14516c3a 3783
9e33bed5 3784 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3785 rpc_restart_call_prepare(task);
788e7a89 3786 return -EAGAIN;
1da177e4 3787 }
788e7a89 3788 return 0;
1da177e4
LT		 3789}
3790
0b7c0153 3791static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3792{
3793 if (!nfs4_sequence_done(task, &data->res.seq_res))
3794 return -EAGAIN;
0b7c0153 3795 return data->commit_done_cb(task, data);
5f452431
FI		 3796}
3797
0b7c0153 3798static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3799{
788e7a89 3800 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3801
0b7c0153
FI		 3802 if (data->commit_done_cb == NULL)
3803 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3804 data->res.server = server;
bdc7f021 3805 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3806 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3807}
3808
9bc4e3ca
CL		 3809struct nfs4_renewdata {
3810 struct nfs_client *client;
3811 unsigned long timestamp;
3812};
3813
1da177e4
LT		 3814/*
3815 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3816 * standalone procedure for queueing an asynchronous RENEW.
3817 */
9bc4e3ca 3818static void nfs4_renew_release(void *calldata)
dc96aef9 3819{
9bc4e3ca
CL		 3820 struct nfs4_renewdata *data = calldata;
3821 struct nfs_client *clp = data->client;
dc96aef9 3822
0851de06
AB		 3823 if (atomic_read(&clp->cl_count) > 1)
3824 nfs4_schedule_state_renewal(clp);
3825 nfs_put_client(clp);
9bc4e3ca 3826 kfree(data);
dc96aef9
AB		 3827}
3828
9bc4e3ca 3829static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3830{
9bc4e3ca
CL		 3831 struct nfs4_renewdata *data = calldata;
3832 struct nfs_client *clp = data->client;
3833 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3834
3835 if (task->tk_status < 0) {
95baa25c 3836 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3837 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3838 return;
3839 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3840 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3841 return;
3842 }
3843 nfs4_schedule_path_down_recovery(clp);
1da177e4 3844 }
452e9352 3845 do_renew_lease(clp, timestamp);
1da177e4
LT		 3846}
3847
963d8fe5
TM		 3848static const struct rpc_call_ops nfs4_renew_ops = {
3849 .rpc_call_done = nfs4_renew_done,
dc96aef9 3850 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3851};
3852
2f60ea6b 3853static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3854{
3855 struct rpc_message msg = {
3856 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3857 .rpc_argp = clp,
b4454fe1 3858 .rpc_cred = cred,
1da177e4 3859 };
9bc4e3ca 3860 struct nfs4_renewdata *data;
1da177e4 3861
2f60ea6b
TM		 3862 if (renew_flags == 0)
3863 return 0;
0851de06
AB		 3864 if (!atomic_inc_not_zero(&clp->cl_count))
3865 return -EIO;
b569ad34 3866 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3867 if (data == NULL)
3868 return -ENOMEM;
3869 data->client = clp;
3870 data->timestamp = jiffies;
bc7a05ca 3871 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 3872 &nfs4_renew_ops, data);
1da177e4
LT		 3873}
3874
8534d4ec 3875static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3876{
3877 struct rpc_message msg = {
3878 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3879 .rpc_argp = clp,
b4454fe1 3880 .rpc_cred = cred,
1da177e4
LT		 3881 };
3882 unsigned long now = jiffies;
3883 int status;
3884
bc7a05ca 3885 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3886 if (status < 0)
3887 return status;
452e9352 3888 do_renew_lease(clp, now);
1da177e4
LT		 3889 return 0;
3890}
3891
aa1870af
BF		 3892static inline int nfs4_server_supports_acls(struct nfs_server *server)
3893{
3894 return (server->caps & NFS_CAP_ACLS)
3895 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3896 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3897}
3898
21f498c2
TM		 3899/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3900 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3901 * the stack.
3902 */
21f498c2 3903#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3904
e9e3d724
NH		 3905static int buf_to_pages_noslab(const void *buf, size_t buflen,
3906 struct page **pages, unsigned int *pgbase)
3907{
3908 struct page *newpage, **spages;
3909 int rc = 0;
3910 size_t len;
3911 spages = pages;
3912
3913 do {
21f498c2 3914 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3915 newpage = alloc_page(GFP_KERNEL);
3916
3917 if (newpage == NULL)
3918 goto unwind;
3919 memcpy(page_address(newpage), buf, len);
3920 buf += len;
3921 buflen -= len;
3922 *pages++ = newpage;
3923 rc++;
3924 } while (buflen != 0);
3925
3926 return rc;
3927
3928unwind:
3929 for(; rc > 0; rc--)
3930 __free_page(spages[rc-1]);
3931 return -ENOMEM;
3932}
3933
e50a1c2e
BF		 3934struct nfs4_cached_acl {
3935 int cached;
3936 size_t len;
3e9d4154 3937 char data[0];
e50a1c2e
BF		 3938};
3939
3940static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3941{
3942 struct nfs_inode *nfsi = NFS_I(inode);
3943
3944 spin_lock(&inode->i_lock);
3945 kfree(nfsi->nfs4_acl);
3946 nfsi->nfs4_acl = acl;
3947 spin_unlock(&inode->i_lock);
3948}
3949
3950static void nfs4_zap_acl_attr(struct inode *inode)
3951{
3952 nfs4_set_cached_acl(inode, NULL);
3953}
3954
3955static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3956{
3957 struct nfs_inode *nfsi = NFS_I(inode);
3958 struct nfs4_cached_acl *acl;
3959 int ret = -ENOENT;
3960
3961 spin_lock(&inode->i_lock);
3962 acl = nfsi->nfs4_acl;
3963 if (acl == NULL)
3964 goto out;
3965 if (buf == NULL) /* user is just asking for length */
3966 goto out_len;
3967 if (acl->cached == 0)
3968 goto out;
3969 ret = -ERANGE; /* see getxattr(2) man page */
3970 if (acl->len > buflen)
3971 goto out;
3972 memcpy(buf, acl->data, acl->len);
3973out_len:
3974 ret = acl->len;
3975out:
3976 spin_unlock(&inode->i_lock);
3977 return ret;
3978}
3979
5794d21e 3980static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3981{
3982 struct nfs4_cached_acl *acl;
b291f1b1 3983 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3984
1f1ea6c2 3985 if (buflen <= PAGE_SIZE) {
b291f1b1 3986 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3987 if (acl == NULL)
3988 goto out;
3989 acl->cached = 1;
5794d21e 3990 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3991 } else {
3992 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3993 if (acl == NULL)
3994 goto out;
3995 acl->cached = 0;
3996 }
3997 acl->len = acl_len;
3998out:
3999 nfs4_set_cached_acl(inode, acl);
4000}
4001
bf118a34
AA		 4002/*
4003 * The getxattr API returns the required buffer length when called with a
4004 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4005 * the required buf. On a NULL buf, we send a page of data to the server
4006 * guessing that the ACL request can be serviced by a page. If so, we cache
4007 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4008 * the cache. If not so, we throw away the page, and cache the required
4009 * length. The next getxattr call will then produce another round trip to
4010 * the server, this time with the input buf of the required size.
4011 */
16b4289c 4012static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4013{
bf118a34 4014 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4015 struct nfs_getaclargs args = {
4016 .fh = NFS_FH(inode),
4017 .acl_pages = pages,
4018 .acl_len = buflen,
4019 };
663c79b3
BH		 4020 struct nfs_getaclres res = {
4021 .acl_len = buflen,
4022 };
aa1870af
BF		 4023 struct rpc_message msg = {
4024 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4025 .rpc_argp = &args,
663c79b3 4026 .rpc_resp = &res,
aa1870af 4027 };
21f498c2
TM		 4028 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4029 int ret = -ENOMEM, i;
aa1870af 4030
bf118a34
AA		 4031 /* As long as we're doing a round trip to the server anyway,
4032 * let's be prepared for a page of acl data. */
4033 if (npages == 0)
4034 npages = 1;
21f498c2
TM		 4035 if (npages > ARRAY_SIZE(pages))
4036 return -ERANGE;
5a006899 4037
bf118a34
AA		 4038 for (i = 0; i < npages; i++) {
4039 pages[i] = alloc_page(GFP_KERNEL);
4040 if (!pages[i])
4041 goto out_free;
e50a1c2e 4042 }
5a006899
SP		 4043
4044 /* for decoding across pages */
4045 res.acl_scratch = alloc_page(GFP_KERNEL);
4046 if (!res.acl_scratch)
4047 goto out_free;
4048
bf118a34
AA		 4049 args.acl_len = npages * PAGE_SIZE;
4050 args.acl_pgbase = 0;
5a006899 4051
de040bec 4052 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4053 __func__, buf, buflen, npages, args.acl_len);
4054 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4055 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4056 if (ret)
4057 goto out_free;
bf118a34 4058
1f1ea6c2
TM		 4059 /* Handle the case where the passed-in buffer is too short */
4060 if (res.acl_flags & NFS4_ACL_TRUNC) {
4061 /* Did the user only issue a request for the acl length? */
4062 if (buf == NULL)
4063 goto out_ok;
e50a1c2e 4064 ret = -ERANGE;
1f1ea6c2 4065 goto out_free;
e50a1c2e 4066 }
1f1ea6c2 4067 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4068 if (buf) {
4069 if (res.acl_len > buflen) {
4070 ret = -ERANGE;
4071 goto out_free;
4072 }
1f1ea6c2 4073 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4074 }
1f1ea6c2
TM		 4075out_ok:
4076 ret = res.acl_len;
e50a1c2e 4077out_free:
bf118a34
AA		 4078 for (i = 0; i < npages; i++)
4079 if (pages[i])
4080 __free_page(pages[i]);
331818f1
TM		 4081 if (res.acl_scratch)
4082 __free_page(res.acl_scratch);
aa1870af
BF		 4083 return ret;
4084}
4085
16b4289c
TM		 4086static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4087{
4088 struct nfs4_exception exception = { };
4089 ssize_t ret;
4090 do {
4091 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4092 if (ret >= 0)
4093 break;
4094 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4095 } while (exception.retry);
4096 return ret;
4097}
4098
e50a1c2e
BF		 4099static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4100{
4101 struct nfs_server *server = NFS_SERVER(inode);
4102 int ret;
4103
4104 if (!nfs4_server_supports_acls(server))
4105 return -EOPNOTSUPP;
4106 ret = nfs_revalidate_inode(server, inode);
4107 if (ret < 0)
4108 return ret;
08a22b39
AK		 4109 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4110 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4111 ret = nfs4_read_cached_acl(inode, buf, buflen);
4112 if (ret != -ENOENT)
bf118a34
AA		 4113 /* -ENOENT is returned if there is no ACL or if there is an ACL
4114 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4115 return ret;
4116 return nfs4_get_acl_uncached(inode, buf, buflen);
4117}
4118
16b4289c 4119static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4120{
4121 struct nfs_server *server = NFS_SERVER(inode);
4122 struct page *pages[NFS4ACL_MAXPAGES];
4123 struct nfs_setaclargs arg = {
4124 .fh = NFS_FH(inode),
4125 .acl_pages = pages,
4126 .acl_len = buflen,
4127 };
73c403a9 4128 struct nfs_setaclres res;
4b580ee3
BF		 4129 struct rpc_message msg = {
4130 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4131 .rpc_argp = &arg,
73c403a9 4132 .rpc_resp = &res,
4b580ee3 4133 };
21f498c2 4134 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4135 int ret, i;
4b580ee3
BF		 4136
4137 if (!nfs4_server_supports_acls(server))
4138 return -EOPNOTSUPP;
21f498c2
TM		 4139 if (npages > ARRAY_SIZE(pages))
4140 return -ERANGE;
e9e3d724
NH		 4141 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4142 if (i < 0)
4143 return i;
57ec14c5 4144 nfs4_inode_return_delegation(inode);
7c513058 4145 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4146
4147 /*
4148 * Free each page after tx, so the only ref left is
4149 * held by the network stack
4150 */
4151 for (; i > 0; i--)
4152 put_page(pages[i-1]);
4153
08a22b39
AK		 4154 /*
4155 * Acl update can result in inode attribute update.
4156 * so mark the attribute cache invalid.
4157 */
4158 spin_lock(&inode->i_lock);
4159 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4160 spin_unlock(&inode->i_lock);
f41f7418
TM		 4161 nfs_access_zap_cache(inode);
4162 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4163 return ret;
4164}
4165
16b4289c
TM		 4166static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4167{
4168 struct nfs4_exception exception = { };
4169 int err;
4170 do {
4171 err = nfs4_handle_exception(NFS_SERVER(inode),
4172 __nfs4_proc_set_acl(inode, buf, buflen),
4173 &exception);
4174 } while (exception.retry);
4175 return err;
4176}
4177
1da177e4 4178static int
aa5190d0 4179nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4180{
aa5190d0
TM		 4181 struct nfs_client *clp = server->nfs_client;
4182
4183 if (task->tk_status >= 0)
1da177e4
LT		 4184 return 0;
4185 switch(task->tk_status) {
a1d0b5ee 4186 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4187 case -NFS4ERR_ADMIN_REVOKED:
4188 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4189 if (state == NULL)
4190 break;
4191 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4192 case -NFS4ERR_OPENMODE:
4193 if (state == NULL)
4194 break;
5d422301
TM		 4195 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4196 goto stateid_invalid;
0400a6b0 4197 goto wait_on_recovery;
0ced63d1 4198 case -NFS4ERR_EXPIRED:
5d422301
TM		 4199 if (state != NULL) {
4200 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4201 goto stateid_invalid;
4202 }
1da177e4 4203 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4204 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4205 nfs4_schedule_lease_recovery(clp);
4206 goto wait_on_recovery;
4745e315
AA		 4207#if defined(CONFIG_NFS_V4_1)
4208 case -NFS4ERR_BADSESSION:
4209 case -NFS4ERR_BADSLOT:
4210 case -NFS4ERR_BAD_HIGH_SLOT:
4211 case -NFS4ERR_DEADSESSION:
4212 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4213 case -NFS4ERR_SEQ_FALSE_RETRY:
4214 case -NFS4ERR_SEQ_MISORDERED:
4215 dprintk("%s ERROR %d, Reset session\n", __func__,
4216 task->tk_status);
9f594791 4217 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4218 task->tk_status = 0;
4219 return -EAGAIN;
4220#endif /* CONFIG_NFS_V4_1 */
1da177e4 4221 case -NFS4ERR_DELAY:
aa5190d0 4222 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4223 case -NFS4ERR_GRACE:
1da177e4
LT		 4224 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4225 task->tk_status = 0;
4226 return -EAGAIN;
a8a4ae3a 4227 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4228 case -NFS4ERR_OLD_STATEID:
4229 task->tk_status = 0;
4230 return -EAGAIN;
4231 }
4232 task->tk_status = nfs4_map_errors(task->tk_status);
4233 return 0;
5d422301
TM		 4234stateid_invalid:
4235 task->tk_status = -EIO;
4236 return 0;
0400a6b0 4237wait_on_recovery:
a2c0b9e2 4238 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4239 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4240 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4241 task->tk_status = 0;
4242 return -EAGAIN;
1da177e4
LT		 4243}
4244
f092075d
CL		 4245static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4246 nfs4_verifier *bootverf)
cd93710e
CL		 4247{
4248 __be32 verf[2];
4249
2c820d9a
CL		 4250 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4251 /* An impossible timestamp guarantees this value
4252 * will never match a generated boot time. */
4253 verf[0] = 0;
4254 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4255 } else {
f092075d
CL		 4256 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4257 verf[0] = (__be32)nn->boot_time.tv_sec;
4258 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4259 }
cd93710e
CL		 4260 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4261}
4262
e984a55a
CL		 4263static unsigned int
4264nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4265 char *buf, size_t len)
4266{
4267 unsigned int result;
4268
4269 rcu_read_lock();
4270 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4271 clp->cl_ipaddr,
4272 rpc_peeraddr2str(clp->cl_rpcclient,
4273 RPC_DISPLAY_ADDR),
4274 rpc_peeraddr2str(clp->cl_rpcclient,
4275 RPC_DISPLAY_PROTO));
4276 rcu_read_unlock();
4277 return result;
4278}
4279
4280static unsigned int
4281nfs4_init_uniform_client_string(const struct nfs_client *clp,
4282 char *buf, size_t len)
4283{
6f2ea7f2
CL		 4284 char *nodename = clp->cl_rpcclient->cl_nodename;
4285
4286 if (nfs4_client_id_uniquifier[0] != '\0')
4287 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4288 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4289 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4290 nodename);
e984a55a
CL		 4291}
4292
6bbb4ae8
CL		 4293/**
4294 * nfs4_proc_setclientid - Negotiate client ID
4295 * @clp: state data structure
4296 * @program: RPC program for NFSv4 callback service
4297 * @port: IP port number for NFS4 callback service
4298 * @cred: RPC credential to use for this call
4299 * @res: where to place the result
4300 *
4301 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4302 */
bb8b27e5
TM		 4303int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4304 unsigned short port, struct rpc_cred *cred,
4305 struct nfs4_setclientid_res *res)
1da177e4
LT		 4306{
4307 nfs4_verifier sc_verifier;
4308 struct nfs4_setclientid setclientid = {
4309 .sc_verifier = &sc_verifier,
4310 .sc_prog = program,
f4eecd5d 4311 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4312 };
4313 struct rpc_message msg = {
4314 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4315 .rpc_argp = &setclientid,
bb8b27e5 4316 .rpc_resp = res,
286d7d6a 4317 .rpc_cred = cred,
1da177e4 4318 };
6bbb4ae8 4319 int status;
1da177e4 4320
de734831 4321 /* nfs_client_id4 */
f092075d 4322 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4323 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4324 setclientid.sc_name_len =
4325 nfs4_init_uniform_client_string(clp,
4326 setclientid.sc_name,
4327 sizeof(setclientid.sc_name));
4328 else
4329 setclientid.sc_name_len =
4330 nfs4_init_nonuniform_client_string(clp,
4331 setclientid.sc_name,
4332 sizeof(setclientid.sc_name));
de734831 4333 /* cb_client4 */
e984a55a 4334 rcu_read_lock();
de734831 4335 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4336 sizeof(setclientid.sc_netid),
4337 rpc_peeraddr2str(clp->cl_rpcclient,
4338 RPC_DISPLAY_NETID));
de734831
CL		 4339 rcu_read_unlock();
4340 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4341 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4342 clp->cl_ipaddr, port >> 8, port & 255);
4343
6bbb4ae8
CL		 4344 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4345 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4346 setclientid.sc_name_len, setclientid.sc_name);
4347 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4348 dprintk("NFS reply setclientid: %d\n", status);
4349 return status;
1da177e4
LT		 4350}
4351
6bbb4ae8
CL		 4352/**
4353 * nfs4_proc_setclientid_confirm - Confirm client ID
4354 * @clp: state data structure
4355 * @res: result of a previous SETCLIENTID
4356 * @cred: RPC credential to use for this call
4357 *
4358 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4359 */
fd954ae1 4360int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4361 struct nfs4_setclientid_res *arg,
4362 struct rpc_cred *cred)
1da177e4 4363{
1da177e4
LT		 4364 struct rpc_message msg = {
4365 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4366 .rpc_argp = arg,
286d7d6a 4367 .rpc_cred = cred,
1da177e4 4368 };
1da177e4
LT		 4369 int status;
4370
6bbb4ae8
CL		 4371 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4372 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4373 clp->cl_clientid);
1bd714f2 4374 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6bbb4ae8 4375 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4376 return status;
4377}
4378
fe650407
TM		 4379struct nfs4_delegreturndata {
4380 struct nfs4_delegreturnargs args;
fa178f29 4381 struct nfs4_delegreturnres res;
fe650407
TM		 4382 struct nfs_fh fh;
4383 nfs4_stateid stateid;
26e976a8 4384 unsigned long timestamp;
fa178f29 4385 struct nfs_fattr fattr;
fe650407
TM		 4386 int rpc_status;
4387};
4388
fe650407
TM		 4389static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4390{
4391 struct nfs4_delegreturndata *data = calldata;
938e1010 4392
14516c3a
TM		 4393 if (!nfs4_sequence_done(task, &data->res.seq_res))
4394 return;
938e1010 4395
79708861
RL		 4396 switch (task->tk_status) {
4397 case -NFS4ERR_STALE_STATEID:
4398 case -NFS4ERR_EXPIRED:
4399 case 0:
fa178f29 4400 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4401 break;
4402 default:
4403 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4404 -EAGAIN) {
d00c5d43 4405 rpc_restart_call_prepare(task);
79708861
RL		 4406 return;
4407 }
4408 }
4409 data->rpc_status = task->tk_status;
fe650407
TM		 4410}
4411
4412static void nfs4_delegreturn_release(void *calldata)
4413{
fe650407
TM		 4414 kfree(calldata);
4415}
4416
938e1010
AA		 4417#if defined(CONFIG_NFS_V4_1)
4418static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4419{
4420 struct nfs4_delegreturndata *d_data;
4421
4422 d_data = (struct nfs4_delegreturndata *)data;
4423
d9afbd1b
TM		 4424 nfs4_setup_sequence(d_data->res.server,
4425 &d_data->args.seq_args,
4426 &d_data->res.seq_res,
4427 task);
938e1010
AA		 4428}
4429#endif /* CONFIG_NFS_V4_1 */
4430
c8d149f3 4431static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4432#if defined(CONFIG_NFS_V4_1)
4433 .rpc_call_prepare = nfs4_delegreturn_prepare,
4434#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4435 .rpc_call_done = nfs4_delegreturn_done,
4436 .rpc_release = nfs4_delegreturn_release,
4437};
4438
e6f81075 4439static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4440{
4441 struct nfs4_delegreturndata *data;
fa178f29 4442 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4443 struct rpc_task *task;
5138fde0
TM		 4444 struct rpc_message msg = {
4445 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4446 .rpc_cred = cred,
4447 };
c970aa85
TM		 4448 struct rpc_task_setup task_setup_data = {
4449 .rpc_client = server->client,
5138fde0 4450 .rpc_message = &msg,
c970aa85
TM		 4451 .callback_ops = &nfs4_delegreturn_ops,
4452 .flags = RPC_TASK_ASYNC,
4453 };
e6f81075 4454 int status = 0;
fe650407 4455
8535b2be 4456 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4457 if (data == NULL)
4458 return -ENOMEM;
9d12b216 4459 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4460 data->args.fhandle = &data->fh;
4461 data->args.stateid = &data->stateid;
9e907fec 4462 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4463 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4464 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4465 data->res.fattr = &data->fattr;
4466 data->res.server = server;
5138fde0 4467 nfs_fattr_init(data->res.fattr);
26e976a8 4468 data->timestamp = jiffies;
fe650407
TM		 4469 data->rpc_status = 0;
4470
c970aa85 4471 task_setup_data.callback_data = data;
1174dd1f
TM		 4472 msg.rpc_argp = &data->args;
4473 msg.rpc_resp = &data->res;
c970aa85 4474 task = rpc_run_task(&task_setup_data);
7a1218a2 4475 if (IS_ERR(task))
fe650407 4476 return PTR_ERR(task);
e6f81075
TM		 4477 if (!issync)
4478 goto out;
fe650407 4479 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4480 if (status != 0)
4481 goto out;
4482 status = data->rpc_status;
e144cbcc
TM		 4483 if (status == 0)
4484 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4485 else
4486 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4487out:
e6b3c4db 4488 rpc_put_task(task);
fe650407 4489 return status;
1da177e4
LT		 4490}
4491
e6f81075 4492int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4493{
4494 struct nfs_server *server = NFS_SERVER(inode);
4495 struct nfs4_exception exception = { };
4496 int err;
4497 do {
e6f81075 4498 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4499 switch (err) {
4500 case -NFS4ERR_STALE_STATEID:
4501 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4502 case 0:
4503 return 0;
4504 }
4505 err = nfs4_handle_exception(server, err, &exception);
4506 } while (exception.retry);
4507 return err;
4508}
4509
4510#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4511#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4512
4513/*
4514 * sleep, with exponential backoff, and retry the LOCK operation.
4515 */
4516static unsigned long
4517nfs4_set_lock_task_retry(unsigned long timeout)
4518{
d310310c 4519 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4520 timeout <<= 1;
4521 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4522 return NFS4_LOCK_MAXTIMEOUT;
4523 return timeout;
4524}
4525
1da177e4
LT		 4526static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4527{
4528 struct inode *inode = state->inode;
4529 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4530 struct nfs_client *clp = server->nfs_client;
911d1aaf 4531 struct nfs_lockt_args arg = {
1da177e4 4532 .fh = NFS_FH(inode),
911d1aaf 4533 .fl = request,
1da177e4 4534 };
911d1aaf
TM		 4535 struct nfs_lockt_res res = {
4536 .denied = request,
1da177e4
LT		 4537 };
4538 struct rpc_message msg = {
4539 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4540 .rpc_argp = &arg,
4541 .rpc_resp = &res,
4542 .rpc_cred = state->owner->so_cred,
4543 };
1da177e4
LT		 4544 struct nfs4_lock_state *lsp;
4545 int status;
4546
911d1aaf 4547 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4548 status = nfs4_set_lock_state(state, request);
4549 if (status != 0)
4550 goto out;
4551 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4552 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4553 arg.lock_owner.s_dev = server->s_dev;
7c513058 4554 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4555 switch (status) {
4556 case 0:
4557 request->fl_type = F_UNLCK;
4558 break;
4559 case -NFS4ERR_DENIED:
4560 status = 0;
1da177e4 4561 }
70cc6487 4562 request->fl_ops->fl_release_private(request);
8d0a8a9d 4563out:
1da177e4
LT		 4564 return status;
4565}
4566
4567static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4568{
4569 struct nfs4_exception exception = { };
4570 int err;
4571
4572 do {
4573 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4574 _nfs4_proc_getlk(state, cmd, request),
4575 &exception);
4576 } while (exception.retry);
4577 return err;
4578}
4579
4580static int do_vfs_lock(struct file *file, struct file_lock *fl)
4581{
4582 int res = 0;
4583 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4584 case FL_POSIX:
4585 res = posix_lock_file_wait(file, fl);
4586 break;
4587 case FL_FLOCK:
4588 res = flock_lock_file_wait(file, fl);
4589 break;
4590 default:
4591 BUG();
4592 }
1da177e4
LT		 4593 return res;
4594}
4595
faf5f49c 4596struct nfs4_unlockdata {
911d1aaf
TM		 4597 struct nfs_locku_args arg;
4598 struct nfs_locku_res res;
faf5f49c
TM		 4599 struct nfs4_lock_state *lsp;
4600 struct nfs_open_context *ctx;
911d1aaf
TM		 4601 struct file_lock fl;
4602 const struct nfs_server *server;
26e976a8 4603 unsigned long timestamp;
faf5f49c
TM		 4604};
4605
911d1aaf
TM		 4606static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4607 struct nfs_open_context *ctx,
4608 struct nfs4_lock_state *lsp,
4609 struct nfs_seqid *seqid)
4610{
4611 struct nfs4_unlockdata *p;
4612 struct inode *inode = lsp->ls_state->inode;
4613
8535b2be 4614 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4615 if (p == NULL)
4616 return NULL;
4617 p->arg.fh = NFS_FH(inode);
4618 p->arg.fl = &p->fl;
4619 p->arg.seqid = seqid;
c1d51931 4620 p->res.seqid = seqid;
911d1aaf
TM		 4621 p->arg.stateid = &lsp->ls_stateid;
4622 p->lsp = lsp;
4623 atomic_inc(&lsp->ls_count);
4624 /* Ensure we don't close file until we're done freeing locks! */
4625 p->ctx = get_nfs_open_context(ctx);
4626 memcpy(&p->fl, fl, sizeof(p->fl));
4627 p->server = NFS_SERVER(inode);
4628 return p;
4629}
4630
06f814a3 4631static void nfs4_locku_release_calldata(void *data)
faf5f49c 4632{
963d8fe5 4633 struct nfs4_unlockdata *calldata = data;
911d1aaf 4634 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4635 nfs4_put_lock_state(calldata->lsp);
4636 put_nfs_open_context(calldata->ctx);
4637 kfree(calldata);
faf5f49c
TM		 4638}
4639
963d8fe5 4640static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4641{
963d8fe5 4642 struct nfs4_unlockdata *calldata = data;
faf5f49c 4643
14516c3a
TM		 4644 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4645 return;
faf5f49c
TM		 4646 switch (task->tk_status) {
4647 case 0:
f597c537
TM		 4648 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4649 &calldata->res.stateid);
26e976a8 4650 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4651 break;
9e33bed5
TM		 4652 case -NFS4ERR_BAD_STATEID:
4653 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4654 case -NFS4ERR_STALE_STATEID:
4655 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4656 break;
4657 default:
9e33bed5 4658 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4659 rpc_restart_call_prepare(task);
faf5f49c 4660 }
2b1bc308 4661 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4662}
4663
4ce70ada 4664static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4665{
4ce70ada 4666 struct nfs4_unlockdata *calldata = data;
faf5f49c 4667
911d1aaf 4668 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 4669 goto out_wait;
795a88c9 4670 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 4671 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 4672 goto out_no_action;
faf5f49c 4673 }
26e976a8 4674 calldata->timestamp = jiffies;
035168ab 4675 if (nfs4_setup_sequence(calldata->server,
a893693c 4676 &calldata->arg.seq_args,
2240a9e2
TM		 4677 &calldata->res.seq_res,
4678 task) != 0)
4679 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 4680 return;
4681out_no_action:
4682 task->tk_action = NULL;
4683out_wait:
4684 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4685}
4686
963d8fe5 4687static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4688 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4689 .rpc_call_done = nfs4_locku_done,
06f814a3 4690 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4691};
4692
a5d16a4d
TM		 4693static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4694 struct nfs_open_context *ctx,
4695 struct nfs4_lock_state *lsp,
4696 struct nfs_seqid *seqid)
4697{
4698 struct nfs4_unlockdata *data;
5138fde0
TM		 4699 struct rpc_message msg = {
4700 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4701 .rpc_cred = ctx->cred,
4702 };
c970aa85
TM		 4703 struct rpc_task_setup task_setup_data = {
4704 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4705 .rpc_message = &msg,
c970aa85 4706 .callback_ops = &nfs4_locku_ops,
101070ca 4707 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4708 .flags = RPC_TASK_ASYNC,
4709 };
a5d16a4d 4710
137d6aca
FF		 4711 /* Ensure this is an unlock - when canceling a lock, the
4712 * canceled lock is passed in, and it won't be an unlock.
4713 */
4714 fl->fl_type = F_UNLCK;
4715
a5d16a4d
TM		 4716 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4717 if (data == NULL) {
4718 nfs_free_seqid(seqid);
4719 return ERR_PTR(-ENOMEM);
4720 }
4721
9d12b216 4722 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4723 msg.rpc_argp = &data->arg;
4724 msg.rpc_resp = &data->res;
c970aa85
TM		 4725 task_setup_data.callback_data = data;
4726 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4727}
4728
faf5f49c
TM		 4729static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4730{
65b62a29
TM		 4731 struct inode *inode = state->inode;
4732 struct nfs4_state_owner *sp = state->owner;
4733 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 4734 struct nfs_seqid *seqid;
1da177e4 4735 struct nfs4_lock_state *lsp;
06f814a3
TM		 4736 struct rpc_task *task;
4737 int status = 0;
536ff0f8 4738 unsigned char fl_flags = request->fl_flags;
faf5f49c 4739
8d0a8a9d 4740 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4741 /* Unlock _before_ we do the RPC call */
4742 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 4743 /* Exclude nfs_delegation_claim_locks() */
4744 mutex_lock(&sp->so_delegreturn_mutex);
4745 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 4746 down_read(&nfsi->rwsem);
4747 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4748 up_read(&nfsi->rwsem);
65b62a29 4749 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 4750 goto out;
19e03c57
TM		 4751 }
4752 up_read(&nfsi->rwsem);
65b62a29 4753 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 4754 if (status != 0)
9b073574
TM		 4755 goto out;
4756 /* Is this a delegated lock? */
4757 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4758 goto out;
8d0a8a9d 4759 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4760 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4761 status = -ENOMEM;
911d1aaf 4762 if (seqid == NULL)
9b073574 4763 goto out;
cd3758e3 4764 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4765 status = PTR_ERR(task);
4766 if (IS_ERR(task))
9b073574 4767 goto out;
a5d16a4d 4768 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4769 rpc_put_task(task);
9b073574 4770out:
536ff0f8 4771 request->fl_flags = fl_flags;
1da177e4
LT		 4772 return status;
4773}
4774
a5d16a4d
TM		 4775struct nfs4_lockdata {
4776 struct nfs_lock_args arg;
4777 struct nfs_lock_res res;
4778 struct nfs4_lock_state *lsp;
4779 struct nfs_open_context *ctx;
4780 struct file_lock fl;
26e976a8 4781 unsigned long timestamp;
a5d16a4d
TM		 4782 int rpc_status;
4783 int cancelled;
66179efe 4784 struct nfs_server *server;
a5d16a4d
TM		 4785};
4786
4787static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4788 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4789 gfp_t gfp_mask)
1da177e4 4790{
a5d16a4d
TM		 4791 struct nfs4_lockdata *p;
4792 struct inode *inode = lsp->ls_state->inode;
1da177e4 4793 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4794
8535b2be 4795 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4796 if (p == NULL)
4797 return NULL;
4798
4799 p->arg.fh = NFS_FH(inode);
4800 p->arg.fl = &p->fl;
8535b2be 4801 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4802 if (p->arg.open_seqid == NULL)
4803 goto out_free;
8535b2be 4804 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4805 if (p->arg.lock_seqid == NULL)
2f74c0a0 4806 goto out_free_seqid;
a5d16a4d 4807 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4808 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4809 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4810 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4811 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4812 p->lsp = lsp;
66179efe 4813 p->server = server;
a5d16a4d
TM		 4814 atomic_inc(&lsp->ls_count);
4815 p->ctx = get_nfs_open_context(ctx);
4816 memcpy(&p->fl, fl, sizeof(p->fl));
4817 return p;
2f74c0a0
TM		 4818out_free_seqid:
4819 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4820out_free:
4821 kfree(p);
4822 return NULL;
4823}
4824
4825static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4826{
4827 struct nfs4_lockdata *data = calldata;
4828 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4829
3110ff80 4830 dprintk("%s: begin!\n", __func__);
2f74c0a0 4831 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 4832 goto out_wait;
a5d16a4d
TM		 4833 /* Do we need to do an open_to_lock_owner? */
4834 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4835 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4836 goto out_release_lock_seqid;
8fe72bac 4837 }
8e472f33 4838 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 4839 data->arg.new_lock_owner = 1;
c1d51931 4840 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4841 } else
4842 data->arg.new_lock_owner = 0;
5d422301
TM		 4843 if (!nfs4_valid_open_stateid(state)) {
4844 data->rpc_status = -EBADF;
4845 task->tk_action = NULL;
4846 goto out_release_open_seqid;
4847 }
26e976a8 4848 data->timestamp = jiffies;
035168ab
TM		 4849 if (nfs4_setup_sequence(data->server,
4850 &data->arg.seq_args,
2240a9e2 4851 &data->res.seq_res,
d9afbd1b 4852 task) == 0)
66179efe 4853 return;
5d422301 4854out_release_open_seqid:
2240a9e2
TM		 4855 nfs_release_seqid(data->arg.open_seqid);
4856out_release_lock_seqid:
4857 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 4858out_wait:
4859 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 4860 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4861}
4862
a5d16a4d
TM		 4863static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4864{
4865 struct nfs4_lockdata *data = calldata;
4866
3110ff80 4867 dprintk("%s: begin!\n", __func__);
a5d16a4d 4868
14516c3a
TM		 4869 if (!nfs4_sequence_done(task, &data->res.seq_res))
4870 return;
66179efe 4871
a5d16a4d 4872 data->rpc_status = task->tk_status;
a5d16a4d 4873 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4874 if (data->rpc_status == 0)
4875 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4876 else
4877 goto out;
4878 }
4879 if (data->rpc_status == 0) {
f597c537 4880 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4881 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4882 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4883 }
a5d16a4d 4884out:
3110ff80 4885 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4886}
4887
4888static void nfs4_lock_release(void *calldata)
4889{
4890 struct nfs4_lockdata *data = calldata;
4891
3110ff80 4892 dprintk("%s: begin!\n", __func__);
2f74c0a0 4893 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4894 if (data->cancelled != 0) {
4895 struct rpc_task *task;
4896 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4897 data->arg.lock_seqid);
4898 if (!IS_ERR(task))
bf294b41 4899 rpc_put_task_async(task);
3110ff80 4900 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4901 } else
4902 nfs_free_seqid(data->arg.lock_seqid);
4903 nfs4_put_lock_state(data->lsp);
4904 put_nfs_open_context(data->ctx);
4905 kfree(data);
3110ff80 4906 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4907}
4908
4909static const struct rpc_call_ops nfs4_lock_ops = {
4910 .rpc_call_prepare = nfs4_lock_prepare,
4911 .rpc_call_done = nfs4_lock_done,
4912 .rpc_release = nfs4_lock_release,
4913};
4914
2bee72a6
TM		 4915static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4916{
2bee72a6
TM		 4917 switch (error) {
4918 case -NFS4ERR_ADMIN_REVOKED:
4919 case -NFS4ERR_BAD_STATEID:
ecac799a 4920 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4921 if (new_lock_owner != 0 ||
795a88c9 4922 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4923 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4924 break;
4925 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4926 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4927 case -NFS4ERR_EXPIRED:
4928 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4929 };
4930}
4931
afe6c27c 4932static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4933{
4934 struct nfs4_lockdata *data;
4935 struct rpc_task *task;
5138fde0
TM		 4936 struct rpc_message msg = {
4937 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4938 .rpc_cred = state->owner->so_cred,
4939 };
c970aa85
TM		 4940 struct rpc_task_setup task_setup_data = {
4941 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4942 .rpc_message = &msg,
c970aa85 4943 .callback_ops = &nfs4_lock_ops,
101070ca 4944 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4945 .flags = RPC_TASK_ASYNC,
4946 };
a5d16a4d
TM		 4947 int ret;
4948
3110ff80 4949 dprintk("%s: begin!\n", __func__);
cd3758e3 4950 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4951 fl->fl_u.nfs4_fl.owner,
4952 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4953 if (data == NULL)
4954 return -ENOMEM;
4955 if (IS_SETLKW(cmd))
4956 data->arg.block = 1;
9d12b216 4957 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4958 msg.rpc_argp = &data->arg;
4959 msg.rpc_resp = &data->res;
c970aa85 4960 task_setup_data.callback_data = data;
8fe72bac
TM		 4961 if (recovery_type > NFS_LOCK_NEW) {
4962 if (recovery_type == NFS_LOCK_RECLAIM)
4963 data->arg.reclaim = NFS_LOCK_RECLAIM;
4964 nfs4_set_sequence_privileged(&data->arg.seq_args);
4965 }
c970aa85 4966 task = rpc_run_task(&task_setup_data);
7a1218a2 4967 if (IS_ERR(task))
a5d16a4d 4968 return PTR_ERR(task);
a5d16a4d
TM		 4969 ret = nfs4_wait_for_completion_rpc_task(task);
4970 if (ret == 0) {
4971 ret = data->rpc_status;
2bee72a6
TM		 4972 if (ret)
4973 nfs4_handle_setlk_error(data->server, data->lsp,
4974 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4975 } else
4976 data->cancelled = 1;
e6b3c4db 4977 rpc_put_task(task);
3110ff80 4978 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4979 return ret;
1da177e4
LT		 4980}
4981
4982static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4983{
202b50dc 4984 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4985 struct nfs4_exception exception = {
4986 .inode = state->inode,
4987 };
202b50dc
TM		 4988 int err;
4989
4990 do {
42a2d13e
TM		 4991 /* Cache the lock if possible... */
4992 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4993 return 0;
afe6c27c 4994 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4995 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4996 break;
4997 nfs4_handle_exception(server, err, &exception);
4998 } while (exception.retry);
4999 return err;
1da177e4
LT		 5000}
5001
5002static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5003{
202b50dc 5004 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5005 struct nfs4_exception exception = {
5006 .inode = state->inode,
5007 };
202b50dc
TM		 5008 int err;
5009
6bfc93ef
TM		 5010 err = nfs4_set_lock_state(state, request);
5011 if (err != 0)
5012 return err;
202b50dc 5013 do {
42a2d13e
TM		 5014 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5015 return 0;
afe6c27c 5016 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 5017 switch (err) {
5018 default:
5019 goto out;
5020 case -NFS4ERR_GRACE:
5021 case -NFS4ERR_DELAY:
5022 nfs4_handle_exception(server, err, &exception);
5023 err = 0;
5024 }
202b50dc 5025 } while (exception.retry);
a9ed2e25 5026out:
202b50dc 5027 return err;
1da177e4
LT		 5028}
5029
f062eb6c 5030#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5031/**
5032 * nfs41_check_expired_locks - possibly free a lock stateid
5033 *
5034 * @state: NFSv4 state for an inode
5035 *
5036 * Returns NFS_OK if recovery for this stateid is now finished.
5037 * Otherwise a negative NFS4ERR value is returned.
5038 */
b01dd1d8 5039static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5040{
eb64cf96 5041 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5042 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5043 struct nfs_server *server = NFS_SERVER(state->inode);
5044
b01dd1d8 5045 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5046 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 5047 status = nfs41_test_stateid(server, &lsp->ls_stateid);
5048 if (status != NFS_OK) {
3e60ffdd
CL		 5049 /* Free the stateid unless the server
5050 * informs us the stateid is unrecognized. */
89af2739
CL		 5051 if (status != -NFS4ERR_BAD_STATEID)
5052 nfs41_free_stateid(server,
5053 &lsp->ls_stateid);
795a88c9 5054 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5055 ret = status;
5056 }
5057 }
5058 };
5059
5060 return ret;
5061}
5062
5063static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5064{
5065 int status = NFS_OK;
5066
5067 if (test_bit(LK_STATE_IN_USE, &state->flags))
5068 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5069 if (status != NFS_OK)
5070 status = nfs4_lock_expired(state, request);
5071 return status;
f062eb6c
BS		 5072}
5073#endif
5074
1da177e4
LT		 5075static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5076{
9a99af49 5077 struct nfs4_state_owner *sp = state->owner;
19e03c57 5078 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5079 unsigned char fl_flags = request->fl_flags;
9a99af49 5080 unsigned int seq;
8e469ebd 5081 int status = -ENOLCK;
1da177e4 5082
8e469ebd
TM		 5083 if ((fl_flags & FL_POSIX) &&
5084 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5085 goto out;
6bfc93ef 5086 /* Is this a delegated open? */
6bfc93ef
TM		 5087 status = nfs4_set_lock_state(state, request);
5088 if (status != 0)
5089 goto out;
01c3b861
TM		 5090 request->fl_flags |= FL_ACCESS;
5091 status = do_vfs_lock(request->fl_file, request);
5092 if (status < 0)
5093 goto out;
19e03c57 5094 down_read(&nfsi->rwsem);
01c3b861 5095 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5096 /* Yes: cache locks! */
01c3b861 5097 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5098 request->fl_flags = fl_flags & ~FL_SLEEP;
5099 status = do_vfs_lock(request->fl_file, request);
5100 goto out_unlock;
01c3b861 5101 }
9a99af49
TM		 5102 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5103 up_read(&nfsi->rwsem);
afe6c27c 5104 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5105 if (status != 0)
9a99af49
TM		 5106 goto out;
5107 down_read(&nfsi->rwsem);
5108 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5109 status = -NFS4ERR_DELAY;
01c3b861 5110 goto out_unlock;
9a99af49 5111 }
6bfc93ef 5112 /* Note: we always want to sleep here! */
01c3b861 5113 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5114 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5115 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5116 "manager!\n", __func__);
01c3b861 5117out_unlock:
19e03c57 5118 up_read(&nfsi->rwsem);
01c3b861
TM		 5119out:
5120 request->fl_flags = fl_flags;
1da177e4
LT		 5121 return status;
5122}
5123
5124static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5125{
a1d0b5ee
TM		 5126 struct nfs4_exception exception = {
5127 .state = state,
05ffe24f 5128 .inode = state->inode,
a1d0b5ee 5129 };
1da177e4
LT		 5130 int err;
5131
5132 do {
965b5d67
TM		 5133 err = _nfs4_proc_setlk(state, cmd, request);
5134 if (err == -NFS4ERR_DENIED)
5135 err = -EAGAIN;
1da177e4 5136 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5137 err, &exception);
1da177e4
LT		 5138 } while (exception.retry);
5139 return err;
5140}
5141
5142static int
5143nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5144{
5145 struct nfs_open_context *ctx;
5146 struct nfs4_state *state;
5147 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5148 int status;
5149
5150 /* verify open state */
cd3758e3 5151 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5152 state = ctx->state;
5153
5154 if (request->fl_start < 0 || request->fl_end < 0)
5155 return -EINVAL;
5156
d953126a
TM		 5157 if (IS_GETLK(cmd)) {
5158 if (state != NULL)
5159 return nfs4_proc_getlk(state, F_GETLK, request);
5160 return 0;
5161 }
1da177e4
LT		 5162
5163 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5164 return -EINVAL;
5165
d953126a
TM		 5166 if (request->fl_type == F_UNLCK) {
5167 if (state != NULL)
5168 return nfs4_proc_unlck(state, cmd, request);
5169 return 0;
5170 }
1da177e4 5171
d953126a
TM		 5172 if (state == NULL)
5173 return -ENOLCK;
55725513
TM		 5174 /*
5175 * Don't rely on the VFS having checked the file open mode,
5176 * since it won't do this for flock() locks.
5177 */
f44106e2 5178 switch (request->fl_type) {
55725513
TM		 5179 case F_RDLCK:
5180 if (!(filp->f_mode & FMODE_READ))
5181 return -EBADF;
5182 break;
5183 case F_WRLCK:
5184 if (!(filp->f_mode & FMODE_WRITE))
5185 return -EBADF;
5186 }
5187
1da177e4
LT		 5188 do {
5189 status = nfs4_proc_setlk(state, cmd, request);
5190 if ((status != -EAGAIN) || IS_SETLK(cmd))
5191 break;
5192 timeout = nfs4_set_lock_task_retry(timeout);
5193 status = -ERESTARTSYS;
5194 if (signalled())
5195 break;
5196 } while(status < 0);
1da177e4
LT		 5197 return status;
5198}
5199
db4f2e63 5200int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5201{
5202 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5203 int err;
5204
5205 err = nfs4_set_lock_state(state, fl);
5206 if (err != 0)
db4f2e63 5207 return err;
4a706fa0 5208 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5209 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5210}
6b3b5496 5211
cf470c3e
TM		 5212struct nfs_release_lockowner_data {
5213 struct nfs4_lock_state *lsp;
5ae67c4f 5214 struct nfs_server *server;
cf470c3e
TM		 5215 struct nfs_release_lockowner_args args;
5216};
5217
d3c7b7cc
TM		 5218static void nfs4_release_lockowner_release(void *calldata)
5219{
cf470c3e 5220 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5221 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5222 kfree(calldata);
5223}
5224
17280175 5225static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5226 .rpc_release = nfs4_release_lockowner_release,
5227};
5228
cf470c3e 5229int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 5230{
5231 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 5232 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5233 struct rpc_message msg = {
5234 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5235 };
5236
5237 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5238 return -EINVAL;
5239 data = kmalloc(sizeof(*data), GFP_NOFS);
5240 if (!data)
5241 return -ENOMEM;
5242 data->lsp = lsp;
5ae67c4f 5243 data->server = server;
cf470c3e
TM		 5244 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5245 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5246 data->args.lock_owner.s_dev = server->s_dev;
5247 msg.rpc_argp = &data->args;
5248 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5249 return 0;
d3c7b7cc
TM		 5250}
5251
aa1870af
BF		 5252#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5253
64c2ce8b
AK		 5254static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5255 const void *buf, size_t buflen,
5256 int flags, int type)
6b3b5496 5257{
64c2ce8b
AK		 5258 if (strcmp(key, "") != 0)
5259 return -EINVAL;
4b580ee3 5260
64c2ce8b 5261 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5262}
5263
64c2ce8b
AK		 5264static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5265 void *buf, size_t buflen, int type)
6b3b5496 5266{
64c2ce8b
AK		 5267 if (strcmp(key, "") != 0)
5268 return -EINVAL;
aa1870af 5269
64c2ce8b 5270 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5271}
5272
64c2ce8b
AK		 5273static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5274 size_t list_len, const char *name,
5275 size_t name_len, int type)
6b3b5496 5276{
64c2ce8b 5277 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5278
096455a2
BF		 5279 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5280 return 0;
64c2ce8b
AK		 5281
5282 if (list && len <= list_len)
5283 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5284 return len;
6b3b5496
BF		 5285}
5286
533eb461
AA		 5287/*
5288 * nfs_fhget will use either the mounted_on_fileid or the fileid
5289 */
69aaaae1
TM		 5290static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5291{
533eb461
AA		 5292 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5293 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5294 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5295 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5296 return;
5297
5298 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5299 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5300 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5301 fattr->nlink = 2;
5302}
5303
f05d147f
BS		 5304static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5305 const struct qstr *name,
5306 struct nfs4_fs_locations *fs_locations,
5307 struct page *page)
683b57b4
TM		 5308{
5309 struct nfs_server *server = NFS_SERVER(dir);
5310 u32 bitmask[2] = {
361e624f 5311 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5312 };
5313 struct nfs4_fs_locations_arg args = {
5314 .dir_fh = NFS_FH(dir),
c228fd3a 5315 .name = name,
683b57b4
TM		 5316 .page = page,
5317 .bitmask = bitmask,
5318 };
22958463
BH		 5319 struct nfs4_fs_locations_res res = {
5320 .fs_locations = fs_locations,
5321 };
683b57b4
TM		 5322 struct rpc_message msg = {
5323 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5324 .rpc_argp = &args,
22958463 5325 .rpc_resp = &res,
683b57b4
TM		 5326 };
5327 int status;
5328
3110ff80 5329 dprintk("%s: start\n", __func__);
533eb461
AA		 5330
5331 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5332 * is not supported */
5333 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5334 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5335 else
5336 bitmask[0] |= FATTR4_WORD0_FILEID;
5337
c228fd3a 5338 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5339 fs_locations->server = server;
830b8e33 5340 fs_locations->nlocations = 0;
f05d147f 5341 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5342 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5343 return status;
5344}
5345
f05d147f
BS		 5346int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5347 const struct qstr *name,
5348 struct nfs4_fs_locations *fs_locations,
5349 struct page *page)
db0a9593
BS		 5350{
5351 struct nfs4_exception exception = { };
5352 int err;
5353 do {
5354 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5355 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5356 &exception);
5357 } while (exception.retry);
5358 return err;
5359}
5360
5a5ea0d4
BS		 5361static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5362{
5363 int status;
5364 struct nfs4_secinfo_arg args = {
5365 .dir_fh = NFS_FH(dir),
5366 .name = name,
5367 };
5368 struct nfs4_secinfo_res res = {
5369 .flavors = flavors,
5370 };
5371 struct rpc_message msg = {
5372 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5373 .rpc_argp = &args,
5374 .rpc_resp = &res,
5375 };
5376
5377 dprintk("NFS call secinfo %s\n", name->name);
5378 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5379 dprintk("NFS reply secinfo: %d\n", status);
5380 return status;
5381}
5382
72de53ec
BS		 5383int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5384 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5385{
5386 struct nfs4_exception exception = { };
5387 int err;
5388 do {
5389 err = nfs4_handle_exception(NFS_SERVER(dir),
5390 _nfs4_proc_secinfo(dir, name, flavors),
5391 &exception);
5392 } while (exception.retry);
5393 return err;
5394}
5395
557134a3 5396#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5397/*
5398 * Check the exchange flags returned by the server for invalid flags, having
5399 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5400 * DS flags set.
5401 */
5402static int nfs4_check_cl_exchange_flags(u32 flags)
5403{
5404 if (flags & ~EXCHGID4_FLAG_MASK_R)
5405 goto out_inval;
5406 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5407 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5408 goto out_inval;
5409 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5410 goto out_inval;
5411 return NFS_OK;
5412out_inval:
5413 return -NFS4ERR_INVAL;
5414}
5415
78fe0f41 5416static bool
79d4e1f0
CL		 5417nfs41_same_server_scope(struct nfs41_server_scope *a,
5418 struct nfs41_server_scope *b)
78fe0f41
WAA		 5419{
5420 if (a->server_scope_sz == b->server_scope_sz &&
5421 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5422 return true;
5423
5424 return false;
5425}
5426
7c44f1ae
WAA		 5427/*
5428 * nfs4_proc_bind_conn_to_session()
5429 *
5430 * The 4.1 client currently uses the same TCP connection for the
5431 * fore and backchannel.
5432 */
2cf047c9 5433int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5434{
5435 int status;
5436 struct nfs41_bind_conn_to_session_res res;
5437 struct rpc_message msg = {
5438 .rpc_proc =
5439 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5440 .rpc_argp = clp,
5441 .rpc_resp = &res,
2cf047c9 5442 .rpc_cred = cred,
7c44f1ae
WAA		 5443 };
5444
5445 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5446
5447 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5448 if (unlikely(res.session == NULL)) {
5449 status = -ENOMEM;
5450 goto out;
5451 }
5452
5453 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5454 if (status == 0) {
5455 if (memcmp(res.session->sess_id.data,
5456 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5457 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5458 status = -EIO;
5459 goto out_session;
5460 }
5461 if (res.dir != NFS4_CDFS4_BOTH) {
5462 dprintk("NFS: %s: Unexpected direction from server\n",
5463 __func__);
5464 status = -EIO;
5465 goto out_session;
5466 }
5467 if (res.use_conn_in_rdma_mode) {
5468 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5469 __func__);
5470 status = -EIO;
5471 goto out_session;
5472 }
5473 }
5474out_session:
5475 kfree(res.session);
5476out:
5477 dprintk("<-- %s status= %d\n", __func__, status);
5478 return status;
5479}
5480
99fe60d0
BH		 5481/*
5482 * nfs4_proc_exchange_id()
5483 *
6bbb4ae8
CL		 5484 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5485 *
99fe60d0
BH		 5486 * Since the clientid has expired, all compounds using sessions
5487 * associated with the stale clientid will be returning
5488 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5489 * be in some phase of session reset.
5490 */
4d643d1d 5491int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5492{
5493 nfs4_verifier verifier;
5494 struct nfs41_exchange_id_args args = {
cd93710e 5495 .verifier = &verifier,
99fe60d0 5496 .client = clp,
357f54d6 5497 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5498 };
5499 struct nfs41_exchange_id_res res = {
32b01310 5500 0
99fe60d0
BH		 5501 };
5502 int status;
5503 struct rpc_message msg = {
5504 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5505 .rpc_argp = &args,
5506 .rpc_resp = &res,
5507 .rpc_cred = cred,
5508 };
99fe60d0 5509
f092075d 5510 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5511 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5512 sizeof(args.id));
6bbb4ae8
CL		 5513 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5514 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5515 args.id_len, args.id);
99fe60d0 5516
acdeb69d 5517 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5518 GFP_NOFS);
acdeb69d 5519 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5520 status = -ENOMEM;
5521 goto out;
5522 }
78fe0f41 5523
79d4e1f0 5524 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5525 GFP_NOFS);
177313f1 5526 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5527 status = -ENOMEM;
acdeb69d 5528 goto out_server_owner;
abe9a6d5 5529 }
78fe0f41 5530
bbafffd2 5531 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5532 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5533 status = -ENOMEM;
5534 goto out_server_scope;
5535 }
5536
1bd714f2 5537 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5538 if (status == 0)
32b01310 5539 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5540
acdeb69d 5541 if (status == 0) {
32b01310
TM		 5542 clp->cl_clientid = res.clientid;
5543 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5544 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5545 clp->cl_seqid = res.seqid;
5546
acdeb69d
CL		 5547 kfree(clp->cl_serverowner);
5548 clp->cl_serverowner = res.server_owner;
5549 res.server_owner = NULL;
78fe0f41 5550
7d2ed9ac 5551 /* use the most recent implementation id */
59155546
CL		 5552 kfree(clp->cl_implid);
5553 clp->cl_implid = res.impl_id;
7d2ed9ac 5554
177313f1 5555 if (clp->cl_serverscope != NULL &&
79d4e1f0 5556 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5557 res.server_scope)) {
5558 dprintk("%s: server_scope mismatch detected\n",
5559 __func__);
5560 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5561 kfree(clp->cl_serverscope);
5562 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5563 }
5564
177313f1 5565 if (clp->cl_serverscope == NULL) {
79d4e1f0 5566 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5567 goto out;
5568 }
32b01310
TM		 5569 } else
5570 kfree(res.impl_id);
7d2ed9ac 5571
acdeb69d
CL		 5572out_server_owner:
5573 kfree(res.server_owner);
7d2ed9ac 5574out_server_scope:
abe9a6d5
WAA		 5575 kfree(res.server_scope);
5576out:
177313f1 5577 if (clp->cl_implid != NULL)
6bbb4ae8 5578 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5579 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5580 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5581 clp->cl_implid->date.seconds,
5582 clp->cl_implid->date.nseconds);
6bbb4ae8 5583 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5584 return status;
5585}
5586
66245539
TM		 5587static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5588 struct rpc_cred *cred)
5589{
5590 struct rpc_message msg = {
5591 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5592 .rpc_argp = clp,
5593 .rpc_cred = cred,
5594 };
5595 int status;
5596
5597 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5598 if (status)
02c67525 5599 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5600 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5601 return status;
5602}
5603
5604static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5605 struct rpc_cred *cred)
5606{
5607 unsigned int loop;
5608 int ret;
5609
5610 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5611 ret = _nfs4_proc_destroy_clientid(clp, cred);
5612 switch (ret) {
5613 case -NFS4ERR_DELAY:
5614 case -NFS4ERR_CLIENTID_BUSY:
5615 ssleep(1);
5616 break;
5617 default:
5618 return ret;
5619 }
5620 }
5621 return 0;
5622}
5623
5624int nfs4_destroy_clientid(struct nfs_client *clp)
5625{
5626 struct rpc_cred *cred;
5627 int ret = 0;
5628
5629 if (clp->cl_mvops->minor_version < 1)
5630 goto out;
5631 if (clp->cl_exchange_flags == 0)
5632 goto out;
05f4c350
CL		 5633 if (clp->cl_preserve_clid)
5634 goto out;
66245539
TM		 5635 cred = nfs4_get_exchange_id_cred(clp);
5636 ret = nfs4_proc_destroy_clientid(clp, cred);
5637 if (cred)
5638 put_rpccred(cred);
5639 switch (ret) {
5640 case 0:
5641 case -NFS4ERR_STALE_CLIENTID:
5642 clp->cl_exchange_flags = 0;
5643 }
5644out:
5645 return ret;
5646}
5647
2050f0cc
AA		 5648struct nfs4_get_lease_time_data {
5649 struct nfs4_get_lease_time_args *args;
5650 struct nfs4_get_lease_time_res *res;
5651 struct nfs_client *clp;
5652};
5653
5654static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5655 void *calldata)
5656{
2050f0cc
AA		 5657 struct nfs4_get_lease_time_data *data =
5658 (struct nfs4_get_lease_time_data *)calldata;
5659
5660 dprintk("--> %s\n", __func__);
5661 /* just setup sequence, do not trigger session recovery
5662 since we're invoked within one */
d9afbd1b
TM		 5663 nfs41_setup_sequence(data->clp->cl_session,
5664 &data->args->la_seq_args,
5665 &data->res->lr_seq_res,
5666 task);
2050f0cc
AA		 5667 dprintk("<-- %s\n", __func__);
5668}
5669
5670/*
5671 * Called from nfs4_state_manager thread for session setup, so don't recover
5672 * from sequence operation or clientid errors.
5673 */
5674static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5675{
5676 struct nfs4_get_lease_time_data *data =
5677 (struct nfs4_get_lease_time_data *)calldata;
5678
5679 dprintk("--> %s\n", __func__);
14516c3a
TM		 5680 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5681 return;
2050f0cc
AA		 5682 switch (task->tk_status) {
5683 case -NFS4ERR_DELAY:
5684 case -NFS4ERR_GRACE:
5685 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5686 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5687 task->tk_status = 0;
a8a4ae3a
AA		 5688 /* fall through */
5689 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5690 rpc_restart_call_prepare(task);
2050f0cc
AA		 5691 return;
5692 }
2050f0cc
AA		 5693 dprintk("<-- %s\n", __func__);
5694}
5695
17280175 5696static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5697 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5698 .rpc_call_done = nfs4_get_lease_time_done,
5699};
5700
5701int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5702{
5703 struct rpc_task *task;
5704 struct nfs4_get_lease_time_args args;
5705 struct nfs4_get_lease_time_res res = {
5706 .lr_fsinfo = fsinfo,
5707 };
5708 struct nfs4_get_lease_time_data data = {
5709 .args = &args,
5710 .res = &res,
5711 .clp = clp,
5712 };
5713 struct rpc_message msg = {
5714 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5715 .rpc_argp = &args,
5716 .rpc_resp = &res,
5717 };
5718 struct rpc_task_setup task_setup = {
5719 .rpc_client = clp->cl_rpcclient,
5720 .rpc_message = &msg,
5721 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5722 .callback_data = &data,
5723 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5724 };
5725 int status;
5726
9d12b216 5727 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5728 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5729 dprintk("--> %s\n", __func__);
5730 task = rpc_run_task(&task_setup);
5731
5732 if (IS_ERR(task))
5733 status = PTR_ERR(task);
5734 else {
5735 status = task->tk_status;
5736 rpc_put_task(task);
5737 }
5738 dprintk("<-- %s return %d\n", __func__, status);
5739
5740 return status;
5741}
5742
fc931582
AA		 5743/*
5744 * Initialize the values to be used by the client in CREATE_SESSION
5745 * If nfs4_init_session set the fore channel request and response sizes,
5746 * use them.
5747 *
5748 * Set the back channel max_resp_sz_cached to zero to force the client to
5749 * always set csa_cachethis to FALSE because the current implementation
5750 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5751 */
5752static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5753{
5754 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5755 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5756 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5757
5758 if (mxrqst_sz == 0)
5759 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5760 if (mxresp_sz == 0)
5761 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5762 /* Fore channel attributes */
fc931582
AA		 5763 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5764 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5765 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5766 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5767
5768 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5769 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5770 __func__,
5771 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5772 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5773
5774 /* Back channel attributes */
fc931582
AA		 5775 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5776 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5777 args->bc_attrs.max_resp_sz_cached = 0;
5778 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5779 args->bc_attrs.max_reqs = 1;
5780
5781 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5782 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5783 __func__,
5784 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5785 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5786 args->bc_attrs.max_reqs);
5787}
5788
43c2e885 5789static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5790{
43c2e885
BF		 5791 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5792 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5793
43c2e885
BF		 5794 if (rcvd->max_resp_sz > sent->max_resp_sz)
5795 return -EINVAL;
5796 /*
5797 * Our requested max_ops is the minimum we need; we're not
5798 * prepared to break up compounds into smaller pieces than that.
5799 * So, no point even trying to continue if the server won't
5800 * cooperate:
5801 */
5802 if (rcvd->max_ops < sent->max_ops)
5803 return -EINVAL;
5804 if (rcvd->max_reqs == 0)
5805 return -EINVAL;
b4b9a0c1
VG		 5806 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5807 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5808 return 0;
8d35301d
AA		 5809}
5810
43c2e885
BF		 5811static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5812{
5813 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5814 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5815
43c2e885
BF		 5816 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5817 return -EINVAL;
5818 if (rcvd->max_resp_sz < sent->max_resp_sz)
5819 return -EINVAL;
5820 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5821 return -EINVAL;
5822 /* These would render the backchannel useless: */
b4b9a0c1 5823 if (rcvd->max_ops != sent->max_ops)
43c2e885 5824 return -EINVAL;
b4b9a0c1 5825 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5826 return -EINVAL;
5827 return 0;
5828}
8d35301d 5829
8d35301d
AA		 5830static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5831 struct nfs4_session *session)
5832{
43c2e885 5833 int ret;
8d35301d 5834
43c2e885
BF		 5835 ret = nfs4_verify_fore_channel_attrs(args, session);
5836 if (ret)
5837 return ret;
5838 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5839}
5840
848f5bda
TM		 5841static int _nfs4_proc_create_session(struct nfs_client *clp,
5842 struct rpc_cred *cred)
fc931582
AA		 5843{
5844 struct nfs4_session *session = clp->cl_session;
5845 struct nfs41_create_session_args args = {
5846 .client = clp,
5847 .cb_program = NFS4_CALLBACK,
5848 };
5849 struct nfs41_create_session_res res = {
5850 .client = clp,
5851 };
5852 struct rpc_message msg = {
5853 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5854 .rpc_argp = &args,
5855 .rpc_resp = &res,
848f5bda 5856 .rpc_cred = cred,
fc931582
AA		 5857 };
5858 int status;
5859
5860 nfs4_init_channel_attrs(&args);
0f91421e 5861 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5862
1bd714f2 5863 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5864
43095d39 5865 if (!status) {
8d35301d
AA		 5866 /* Verify the session's negotiated channel_attrs values */
5867 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5868 /* Increment the clientid slot sequence id */
5869 clp->cl_seqid++;
5870 }
5871
5872 return status;
5873}
5874
5875/*
5876 * Issues a CREATE_SESSION operation to the server.
5877 * It is the responsibility of the caller to verify the session is
5878 * expired before calling this routine.
5879 */
848f5bda 5880int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5881{
5882 int status;
5883 unsigned *ptr;
fc931582
AA		 5884 struct nfs4_session *session = clp->cl_session;
5885
5886 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5887
848f5bda 5888 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5889 if (status)
5890 goto out;
5891
aacd5537
AA		 5892 /* Init or reset the session slot tables */
5893 status = nfs4_setup_session_slot_tables(session);
5894 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5895 if (status)
5896 goto out;
5897
5898 ptr = (unsigned *)&session->sess_id.data[0];
5899 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5900 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5901out:
5902 dprintk("<-- %s\n", __func__);
5903 return status;
5904}
5905
0f3e66c6
AA		 5906/*
5907 * Issue the over-the-wire RPC DESTROY_SESSION.
5908 * The caller must serialize access to this routine.
5909 */
848f5bda
TM		 5910int nfs4_proc_destroy_session(struct nfs4_session *session,
5911 struct rpc_cred *cred)
0f3e66c6 5912{
848f5bda
TM		 5913 struct rpc_message msg = {
5914 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5915 .rpc_argp = session,
5916 .rpc_cred = cred,
5917 };
0f3e66c6 5918 int status = 0;
0f3e66c6
AA		 5919
5920 dprintk("--> nfs4_proc_destroy_session\n");
5921
5922 /* session is still being setup */
5923 if (session->clp->cl_cons_state != NFS_CS_READY)
5924 return status;
5925
1bd714f2 5926 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5927
5928 if (status)
08106ac7 5929 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5930 "Session has been destroyed regardless...\n", status);
5931
5932 dprintk("<-- nfs4_proc_destroy_session\n");
5933 return status;
5934}
5935
fc01cea9
AA		 5936/*
5937 * Renew the cl_session lease.
5938 */
d5f8d3fe
TM		 5939struct nfs4_sequence_data {
5940 struct nfs_client *clp;
5941 struct nfs4_sequence_args args;
5942 struct nfs4_sequence_res res;
5943};
5944
dc96aef9
AB		 5945static void nfs41_sequence_release(void *data)
5946{
d5f8d3fe
TM		 5947 struct nfs4_sequence_data *calldata = data;
5948 struct nfs_client *clp = calldata->clp;
dc96aef9 5949
7135840f
AB		 5950 if (atomic_read(&clp->cl_count) > 1)
5951 nfs4_schedule_state_renewal(clp);
5952 nfs_put_client(clp);
d5f8d3fe 5953 kfree(calldata);
dc96aef9
AB		 5954}
5955
aa5190d0
TM		 5956static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5957{
5958 switch(task->tk_status) {
5959 case -NFS4ERR_DELAY:
aa5190d0
TM		 5960 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5961 return -EAGAIN;
5962 default:
0400a6b0 5963 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5964 }
5965 return 0;
5966}
5967
dc96aef9 5968static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5969{
d5f8d3fe
TM		 5970 struct nfs4_sequence_data *calldata = data;
5971 struct nfs_client *clp = calldata->clp;
fc01cea9 5972
14516c3a
TM		 5973 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5974 return;
fc01cea9
AA		 5975
5976 if (task->tk_status < 0) {
5977 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5978 if (atomic_read(&clp->cl_count) == 1)
5979 goto out;
fc01cea9 5980
aa5190d0
TM		 5981 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5982 rpc_restart_call_prepare(task);
fc01cea9
AA		 5983 return;
5984 }
5985 }
fc01cea9 5986 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5987out:
fc01cea9
AA		 5988 dprintk("<-- %s\n", __func__);
5989}
5990
5991static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5992{
d5f8d3fe
TM		 5993 struct nfs4_sequence_data *calldata = data;
5994 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5995 struct nfs4_sequence_args *args;
5996 struct nfs4_sequence_res *res;
5997
fc01cea9
AA		 5998 args = task->tk_msg.rpc_argp;
5999 res = task->tk_msg.rpc_resp;
6000
d9afbd1b 6001 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 6002}
6003
6004static const struct rpc_call_ops nfs41_sequence_ops = {
6005 .rpc_call_done = nfs41_sequence_call_done,
6006 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6007 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6008};
6009
8fe72bac
TM		 6010static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6011 struct rpc_cred *cred,
6012 bool is_privileged)
fc01cea9 6013{
d5f8d3fe 6014 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6015 struct rpc_message msg = {
6016 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6017 .rpc_cred = cred,
6018 };
71ac6da9
TM		 6019 struct rpc_task_setup task_setup_data = {
6020 .rpc_client = clp->cl_rpcclient,
6021 .rpc_message = &msg,
8fe72bac 6022 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 6023 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 6024 };
fc01cea9 6025
7135840f 6026 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6027 return ERR_PTR(-EIO);
dfb4f309 6028 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6029 if (calldata == NULL) {
7135840f 6030 nfs_put_client(clp);
71ac6da9 6031 return ERR_PTR(-ENOMEM);
fc01cea9 6032 }
9d12b216 6033 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6034 if (is_privileged)
6035 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6036 msg.rpc_argp = &calldata->args;
6037 msg.rpc_resp = &calldata->res;
6038 calldata->clp = clp;
71ac6da9 6039 task_setup_data.callback_data = calldata;
fc01cea9 6040
71ac6da9
TM		 6041 return rpc_run_task(&task_setup_data);
6042}
6043
2f60ea6b 6044static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6045{
6046 struct rpc_task *task;
6047 int ret = 0;
6048
2f60ea6b
TM		 6049 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6050 return 0;
8fe72bac 6051 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6052 if (IS_ERR(task))
6053 ret = PTR_ERR(task);
6054 else
bf294b41 6055 rpc_put_task_async(task);
71ac6da9
TM		 6056 dprintk("<-- %s status=%d\n", __func__, ret);
6057 return ret;
6058}
6059
6060static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6061{
6062 struct rpc_task *task;
6063 int ret;
6064
8fe72bac 6065 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6066 if (IS_ERR(task)) {
6067 ret = PTR_ERR(task);
6068 goto out;
6069 }
6070 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6071 if (!ret) {
6072 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6073
6074 if (task->tk_status == 0)
6075 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6076 ret = task->tk_status;
b4410c2f 6077 }
71ac6da9
TM		 6078 rpc_put_task(task);
6079out:
6080 dprintk("<-- %s status=%d\n", __func__, ret);
6081 return ret;
fc01cea9
AA		 6082}
6083
fce5c838
RL		 6084struct nfs4_reclaim_complete_data {
6085 struct nfs_client *clp;
6086 struct nfs41_reclaim_complete_args arg;
6087 struct nfs41_reclaim_complete_res res;
6088};
6089
6090static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6091{
6092 struct nfs4_reclaim_complete_data *calldata = data;
6093
d9afbd1b
TM		 6094 nfs41_setup_sequence(calldata->clp->cl_session,
6095 &calldata->arg.seq_args,
6096 &calldata->res.seq_res,
6097 task);
fce5c838
RL		 6098}
6099
aa5190d0
TM		 6100static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6101{
6102 switch(task->tk_status) {
6103 case 0:
6104 case -NFS4ERR_COMPLETE_ALREADY:
6105 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6106 break;
6107 case -NFS4ERR_DELAY:
aa5190d0 6108 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6109 /* fall through */
6110 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6111 return -EAGAIN;
6112 default:
0400a6b0 6113 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6114 }
6115 return 0;
6116}
6117
fce5c838
RL		 6118static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6119{
6120 struct nfs4_reclaim_complete_data *calldata = data;
6121 struct nfs_client *clp = calldata->clp;
6122 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6123
6124 dprintk("--> %s\n", __func__);
14516c3a
TM		 6125 if (!nfs41_sequence_done(task, res))
6126 return;
fce5c838 6127
aa5190d0
TM		 6128 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6129 rpc_restart_call_prepare(task);
6130 return;
6131 }
fce5c838
RL		 6132 dprintk("<-- %s\n", __func__);
6133}
6134
6135static void nfs4_free_reclaim_complete_data(void *data)
6136{
6137 struct nfs4_reclaim_complete_data *calldata = data;
6138
6139 kfree(calldata);
6140}
6141
6142static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6143 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6144 .rpc_call_done = nfs4_reclaim_complete_done,
6145 .rpc_release = nfs4_free_reclaim_complete_data,
6146};
6147
6148/*
6149 * Issue a global reclaim complete.
6150 */
6151static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6152{
6153 struct nfs4_reclaim_complete_data *calldata;
6154 struct rpc_task *task;
6155 struct rpc_message msg = {
6156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6157 };
6158 struct rpc_task_setup task_setup_data = {
6159 .rpc_client = clp->cl_rpcclient,
6160 .rpc_message = &msg,
6161 .callback_ops = &nfs4_reclaim_complete_call_ops,
6162 .flags = RPC_TASK_ASYNC,
6163 };
6164 int status = -ENOMEM;
6165
6166 dprintk("--> %s\n", __func__);
8535b2be 6167 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6168 if (calldata == NULL)
6169 goto out;
6170 calldata->clp = clp;
6171 calldata->arg.one_fs = 0;
fce5c838 6172
9d12b216 6173 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6174 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6175 msg.rpc_argp = &calldata->arg;
6176 msg.rpc_resp = &calldata->res;
6177 task_setup_data.callback_data = calldata;
6178 task = rpc_run_task(&task_setup_data);
acf82b85 6179 if (IS_ERR(task)) {
fce5c838 6180 status = PTR_ERR(task);
acf82b85
DC		 6181 goto out;
6182 }
c34c32ea
AA		 6183 status = nfs4_wait_for_completion_rpc_task(task);
6184 if (status == 0)
6185 status = task->tk_status;
fce5c838 6186 rpc_put_task(task);
acf82b85 6187 return 0;
fce5c838
RL		 6188out:
6189 dprintk("<-- %s status=%d\n", __func__, status);
6190 return status;
6191}
b1f69b75
AA		 6192
6193static void
6194nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6195{
6196 struct nfs4_layoutget *lgp = calldata;
c31663d4 6197 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6198 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6199
6200 dprintk("--> %s\n", __func__);
c31663d4
FI		 6201 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6202 * right now covering the LAYOUTGET we are about to send.
6203 * However, that is not so catastrophic, and there seems
6204 * to be no way to prevent it completely.
6205 */
6ba7db34 6206 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6207 &lgp->res.seq_res, task))
b1f69b75 6208 return;
cf7d63f1
FI		 6209 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6210 NFS_I(lgp->args.inode)->layout,
6211 lgp->args.ctx->state)) {
6212 rpc_exit(task, NFS4_OK);
cf7d63f1 6213 }
b1f69b75
AA		 6214}
6215
6216static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6217{
6218 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6219 struct inode *inode = lgp->args.inode;
6220 struct nfs_server *server = NFS_SERVER(inode);
6221 struct pnfs_layout_hdr *lo;
6222 struct nfs4_state *state = NULL;
30005121 6223 unsigned long timeo, giveup;
b1f69b75
AA		 6224
6225 dprintk("--> %s\n", __func__);
6226
6ba7db34 6227 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6228 goto out;
b1f69b75
AA		 6229
6230 switch (task->tk_status) {
6231 case 0:
ee314c2a 6232 goto out;
b1f69b75
AA		 6233 case -NFS4ERR_LAYOUTTRYLATER:
6234 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6235 timeo = rpc_get_timeout(task->tk_client);
6236 giveup = lgp->args.timestamp + timeo;
6237 if (time_after(giveup, jiffies))
6238 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6239 break;
6240 case -NFS4ERR_EXPIRED:
6241 case -NFS4ERR_BAD_STATEID:
6242 spin_lock(&inode->i_lock);
6243 lo = NFS_I(inode)->layout;
6244 if (!lo || list_empty(&lo->plh_segs)) {
6245 spin_unlock(&inode->i_lock);
6246 /* If the open stateid was bad, then recover it. */
6247 state = lgp->args.ctx->state;
6248 } else {
6249 LIST_HEAD(head);
6250
6251 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6252 spin_unlock(&inode->i_lock);
6253 /* Mark the bad layout state as invalid, then
6254 * retry using the open stateid. */
6255 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6256 }
6257 }
ee314c2a
TM		 6258 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6259 rpc_restart_call_prepare(task);
6260out:
b1f69b75
AA		 6261 dprintk("<-- %s\n", __func__);
6262}
6263
8554116e
IK		 6264static size_t max_response_pages(struct nfs_server *server)
6265{
6266 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6267 return nfs_page_array_len(0, max_resp_sz);
6268}
6269
6270static void nfs4_free_pages(struct page **pages, size_t size)
6271{
6272 int i;
6273
6274 if (!pages)
6275 return;
6276
6277 for (i = 0; i < size; i++) {
6278 if (!pages[i])
6279 break;
6280 __free_page(pages[i]);
6281 }
6282 kfree(pages);
6283}
6284
6285static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6286{
6287 struct page **pages;
6288 int i;
6289
6290 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6291 if (!pages) {
6292 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6293 return NULL;
6294 }
6295
6296 for (i = 0; i < size; i++) {
6297 pages[i] = alloc_page(gfp_flags);
6298 if (!pages[i]) {
6299 dprintk("%s: failed to allocate page\n", __func__);
6300 nfs4_free_pages(pages, size);
6301 return NULL;
6302 }
6303 }
6304
6305 return pages;
6306}
6307
b1f69b75
AA		 6308static void nfs4_layoutget_release(void *calldata)
6309{
6310 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6311 struct inode *inode = lgp->args.inode;
6312 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6313 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6314
6315 dprintk("--> %s\n", __func__);
8554116e 6316 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6317 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6318 put_nfs_open_context(lgp->args.ctx);
6319 kfree(calldata);
6320 dprintk("<-- %s\n", __func__);
6321}
6322
6323static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6324 .rpc_call_prepare = nfs4_layoutget_prepare,
6325 .rpc_call_done = nfs4_layoutget_done,
6326 .rpc_release = nfs4_layoutget_release,
6327};
6328
a0b0a6e3
TM		 6329struct pnfs_layout_segment *
6330nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6331{
a47970ff
WAA		 6332 struct inode *inode = lgp->args.inode;
6333 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6334 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6335 struct rpc_task *task;
6336 struct rpc_message msg = {
6337 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6338 .rpc_argp = &lgp->args,
6339 .rpc_resp = &lgp->res,
6340 };
6341 struct rpc_task_setup task_setup_data = {
6342 .rpc_client = server->client,
6343 .rpc_message = &msg,
6344 .callback_ops = &nfs4_layoutget_call_ops,
6345 .callback_data = lgp,
6346 .flags = RPC_TASK_ASYNC,
6347 };
a0b0a6e3 6348 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6349 int status = 0;
6350
6351 dprintk("--> %s\n", __func__);
6352
8554116e
IK		 6353 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6354 if (!lgp->args.layout.pages) {
6355 nfs4_layoutget_release(lgp);
a0b0a6e3 6356 return ERR_PTR(-ENOMEM);
8554116e
IK		 6357 }
6358 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6359 lgp->args.timestamp = jiffies;
8554116e 6360
35124a09 6361 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6362 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6363 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6364
6365 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6366 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6367
b1f69b75
AA		 6368 task = rpc_run_task(&task_setup_data);
6369 if (IS_ERR(task))
a0b0a6e3 6370 return ERR_CAST(task);
b1f69b75 6371 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6372 if (status == 0)
6373 status = task->tk_status;
085b7a45
WAA		 6374 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6375 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6376 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6377 rpc_put_task(task);
6378 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6379 if (status)
6380 return ERR_PTR(status);
6381 return lseg;
b1f69b75
AA		 6382}
6383
cbe82603
BH		 6384static void
6385nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6386{
6387 struct nfs4_layoutreturn *lrp = calldata;
6388
6389 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6390 nfs41_setup_sequence(lrp->clp->cl_session,
6391 &lrp->args.seq_args,
6392 &lrp->res.seq_res,
6393 task);
cbe82603
BH		 6394}
6395
6396static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6397{
6398 struct nfs4_layoutreturn *lrp = calldata;
6399 struct nfs_server *server;
6400
6401 dprintk("--> %s\n", __func__);
6402
6ba7db34 6403 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6404 return;
6405
6406 server = NFS_SERVER(lrp->args.inode);
6407 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6408 rpc_restart_call_prepare(task);
cbe82603
BH		 6409 return;
6410 }
cbe82603
BH		 6411 dprintk("<-- %s\n", __func__);
6412}
6413
6414static void nfs4_layoutreturn_release(void *calldata)
6415{
6416 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6417 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6418
6419 dprintk("--> %s\n", __func__);
849b286f
TM		 6420 spin_lock(&lo->plh_inode->i_lock);
6421 if (lrp->res.lrs_present)
6422 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6423 lo->plh_block_lgets--;
6424 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6425 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6426 kfree(calldata);
6427 dprintk("<-- %s\n", __func__);
6428}
6429
6430static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6431 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6432 .rpc_call_done = nfs4_layoutreturn_done,
6433 .rpc_release = nfs4_layoutreturn_release,
6434};
6435
6436int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6437{
6438 struct rpc_task *task;
6439 struct rpc_message msg = {
6440 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6441 .rpc_argp = &lrp->args,
6442 .rpc_resp = &lrp->res,
6443 };
6444 struct rpc_task_setup task_setup_data = {
6445 .rpc_client = lrp->clp->cl_rpcclient,
6446 .rpc_message = &msg,
6447 .callback_ops = &nfs4_layoutreturn_call_ops,
6448 .callback_data = lrp,
6449 };
6450 int status;
6451
6452 dprintk("--> %s\n", __func__);
9d12b216 6453 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6454 task = rpc_run_task(&task_setup_data);
6455 if (IS_ERR(task))
6456 return PTR_ERR(task);
6457 status = task->tk_status;
6458 dprintk("<-- %s status=%d\n", __func__, status);
6459 rpc_put_task(task);
6460 return status;
6461}
6462
7f11d8d3
AA		 6463/*
6464 * Retrieve the list of Data Server devices from the MDS.
6465 */
6466static int _nfs4_getdevicelist(struct nfs_server *server,
6467 const struct nfs_fh *fh,
6468 struct pnfs_devicelist *devlist)
6469{
6470 struct nfs4_getdevicelist_args args = {
6471 .fh = fh,
6472 .layoutclass = server->pnfs_curr_ld->id,
6473 };
6474 struct nfs4_getdevicelist_res res = {
6475 .devlist = devlist,
6476 };
6477 struct rpc_message msg = {
6478 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6479 .rpc_argp = &args,
6480 .rpc_resp = &res,
6481 };
6482 int status;
6483
6484 dprintk("--> %s\n", __func__);
6485 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6486 &res.seq_res, 0);
6487 dprintk("<-- %s status=%d\n", __func__, status);
6488 return status;
6489}
6490
6491int nfs4_proc_getdevicelist(struct nfs_server *server,
6492 const struct nfs_fh *fh,
6493 struct pnfs_devicelist *devlist)
6494{
6495 struct nfs4_exception exception = { };
6496 int err;
6497
6498 do {
6499 err = nfs4_handle_exception(server,
6500 _nfs4_getdevicelist(server, fh, devlist),
6501 &exception);
6502 } while (exception.retry);
6503
6504 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6505 err, devlist->num_devs);
6506
6507 return err;
6508}
6509EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6510
b1f69b75
AA		 6511static int
6512_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6513{
6514 struct nfs4_getdeviceinfo_args args = {
6515 .pdev = pdev,
6516 };
6517 struct nfs4_getdeviceinfo_res res = {
6518 .pdev = pdev,
6519 };
6520 struct rpc_message msg = {
6521 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6522 .rpc_argp = &args,
6523 .rpc_resp = &res,
6524 };
6525 int status;
6526
6527 dprintk("--> %s\n", __func__);
7c513058 6528 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6529 dprintk("<-- %s status=%d\n", __func__, status);
6530
6531 return status;
6532}
6533
6534int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6535{
6536 struct nfs4_exception exception = { };
6537 int err;
6538
6539 do {
6540 err = nfs4_handle_exception(server,
6541 _nfs4_proc_getdeviceinfo(server, pdev),
6542 &exception);
6543 } while (exception.retry);
6544 return err;
6545}
6546EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6547
863a3c6c
AA		 6548static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6549{
6550 struct nfs4_layoutcommit_data *data = calldata;
6551 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6552 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6553
d9afbd1b
TM		 6554 nfs41_setup_sequence(session,
6555 &data->args.seq_args,
6556 &data->res.seq_res,
6557 task);
863a3c6c
AA		 6558}
6559
6560static void
6561nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6562{
6563 struct nfs4_layoutcommit_data *data = calldata;
6564 struct nfs_server *server = NFS_SERVER(data->args.inode);
6565
6ba7db34 6566 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6567 return;
6568
6569 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6570 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6571 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6572 case -NFS4ERR_BADLAYOUT: /* no layout */
6573 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6574 task->tk_status = 0;
e59d27e0
TM		 6575 break;
6576 case 0:
863a3c6c
AA		 6577 nfs_post_op_update_inode_force_wcc(data->args.inode,
6578 data->res.fattr);
e59d27e0
TM		 6579 break;
6580 default:
6581 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6582 rpc_restart_call_prepare(task);
6583 return;
6584 }
6585 }
863a3c6c
AA		 6586}
6587
6588static void nfs4_layoutcommit_release(void *calldata)
6589{
6590 struct nfs4_layoutcommit_data *data = calldata;
6591
db29c089 6592 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 6593 put_rpccred(data->cred);
6594 kfree(data);
6595}
6596
6597static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6598 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6599 .rpc_call_done = nfs4_layoutcommit_done,
6600 .rpc_release = nfs4_layoutcommit_release,
6601};
6602
6603int
ef311537 6604nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6605{
6606 struct rpc_message msg = {
6607 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6608 .rpc_argp = &data->args,
6609 .rpc_resp = &data->res,
6610 .rpc_cred = data->cred,
6611 };
6612 struct rpc_task_setup task_setup_data = {
6613 .task = &data->task,
6614 .rpc_client = NFS_CLIENT(data->args.inode),
6615 .rpc_message = &msg,
6616 .callback_ops = &nfs4_layoutcommit_ops,
6617 .callback_data = data,
6618 .flags = RPC_TASK_ASYNC,
6619 };
6620 struct rpc_task *task;
6621 int status = 0;
6622
6623 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6624 "lbw: %llu inode %lu\n",
6625 data->task.tk_pid, sync,
6626 data->args.lastbytewritten,
6627 data->args.inode->i_ino);
6628
9d12b216 6629 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6630 task = rpc_run_task(&task_setup_data);
6631 if (IS_ERR(task))
6632 return PTR_ERR(task);
ef311537 6633 if (sync == false)
863a3c6c
AA		 6634 goto out;
6635 status = nfs4_wait_for_completion_rpc_task(task);
6636 if (status != 0)
6637 goto out;
6638 status = task->tk_status;
6639out:
6640 dprintk("%s: status %d\n", __func__, status);
6641 rpc_put_task(task);
6642 return status;
6643}
fca78d6d
BS		 6644
6645static int
6646_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6647 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6648{
6649 struct nfs41_secinfo_no_name_args args = {
6650 .style = SECINFO_STYLE_CURRENT_FH,
6651 };
6652 struct nfs4_secinfo_res res = {
6653 .flavors = flavors,
6654 };
6655 struct rpc_message msg = {
6656 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6657 .rpc_argp = &args,
6658 .rpc_resp = &res,
6659 };
6660 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6661}
6662
6663static int
6664nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6665 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6666{
6667 struct nfs4_exception exception = { };
6668 int err;
6669 do {
6670 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6671 switch (err) {
6672 case 0:
6673 case -NFS4ERR_WRONGSEC:
6674 case -NFS4ERR_NOTSUPP:
05e9cfb4 6675 goto out;
fca78d6d
BS		 6676 default:
6677 err = nfs4_handle_exception(server, err, &exception);
6678 }
6679 } while (exception.retry);
05e9cfb4 6680out:
fca78d6d
BS		 6681 return err;
6682}
6683
6684static int
6685nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6686 struct nfs_fsinfo *info)
6687{
6688 int err;
6689 struct page *page;
6690 rpc_authflavor_t flavor;
6691 struct nfs4_secinfo_flavors *flavors;
6692
6693 page = alloc_page(GFP_KERNEL);
6694 if (!page) {
6695 err = -ENOMEM;
6696 goto out;
6697 }
6698
6699 flavors = page_address(page);
6700 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6701
6702 /*
6703 * Fall back on "guess and check" method if
6704 * the server doesn't support SECINFO_NO_NAME
6705 */
6706 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6707 err = nfs4_find_root_sec(server, fhandle, info);
6708 goto out_freepage;
6709 }
6710 if (err)
6711 goto out_freepage;
6712
6713 flavor = nfs_find_best_sec(flavors);
6714 if (err == 0)
6715 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6716
6717out_freepage:
6718 put_page(page);
6719 if (err == -EACCES)
6720 return -EPERM;
6721out:
6722 return err;
6723}
1cab0652
BS		 6724
6725static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6726{
6727 int status;
6728 struct nfs41_test_stateid_args args = {
1cab0652 6729 .stateid = stateid,
7d974794
BS		 6730 };
6731 struct nfs41_test_stateid_res res;
6732 struct rpc_message msg = {
6733 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6734 .rpc_argp = &args,
6735 .rpc_resp = &res,
6736 };
1cab0652 6737
38527b15 6738 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6739 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6740 nfs4_set_sequence_privileged(&args.seq_args);
6741 status = nfs4_call_sync_sequence(server->client, server, &msg,
6742 &args.seq_args, &res.seq_res);
38527b15
CL		 6743 if (status != NFS_OK) {
6744 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6745 return status;
38527b15
CL		 6746 }
6747 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6748 return -res.status;
7d974794
BS		 6749}
6750
38527b15
CL		 6751/**
6752 * nfs41_test_stateid - perform a TEST_STATEID operation
6753 *
6754 * @server: server / transport on which to perform the operation
6755 * @stateid: state ID to test
6756 *
6757 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6758 * Otherwise a negative NFS4ERR value is returned if the operation
6759 * failed or the state ID is not currently valid.
6760 */
1cab0652 6761static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6762{
6763 struct nfs4_exception exception = { };
6764 int err;
6765 do {
377e507d
CL		 6766 err = _nfs41_test_stateid(server, stateid);
6767 if (err != -NFS4ERR_DELAY)
6768 break;
6769 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6770 } while (exception.retry);
6771 return err;
6772}
9aeda35f 6773
1cab0652 6774static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6775{
9aeda35f 6776 struct nfs41_free_stateid_args args = {
1cab0652 6777 .stateid = stateid,
9aeda35f
BS		 6778 };
6779 struct nfs41_free_stateid_res res;
6780 struct rpc_message msg = {
6781 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6782 .rpc_argp = &args,
6783 .rpc_resp = &res,
6784 };
38527b15 6785 int status;
9aeda35f 6786
38527b15 6787 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6788 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 6789 nfs4_set_sequence_privileged(&args.seq_args);
38527b15 6790 status = nfs4_call_sync_sequence(server->client, server, &msg,
8fe72bac 6791 &args.seq_args, &res.seq_res);
38527b15
CL		 6792 dprintk("NFS reply free_stateid: %d\n", status);
6793 return status;
9aeda35f
BS		 6794}
6795
38527b15
CL		 6796/**
6797 * nfs41_free_stateid - perform a FREE_STATEID operation
6798 *
6799 * @server: server / transport on which to perform the operation
6800 * @stateid: state ID to release
6801 *
6802 * Returns NFS_OK if the server freed "stateid". Otherwise a
6803 * negative NFS4ERR value is returned.
6804 */
1cab0652 6805static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6806{
6807 struct nfs4_exception exception = { };
6808 int err;
6809 do {
377e507d
CL		 6810 err = _nfs4_free_stateid(server, stateid);
6811 if (err != -NFS4ERR_DELAY)
6812 break;
6813 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6814 } while (exception.retry);
6815 return err;
6816}
36281caa
TM		 6817
6818static bool nfs41_match_stateid(const nfs4_stateid *s1,
6819 const nfs4_stateid *s2)
6820{
2d2f24ad 6821 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6822 return false;
6823
2d2f24ad 6824 if (s1->seqid == s2->seqid)
36281caa 6825 return true;
2d2f24ad 6826 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6827 return true;
6828
6829 return false;
6830}
6831
557134a3
AA		 6832#endif /* CONFIG_NFS_V4_1 */
6833
36281caa
TM		 6834static bool nfs4_match_stateid(const nfs4_stateid *s1,
6835 const nfs4_stateid *s2)
6836{
f597c537 6837 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6838}
6839
6840
17280175 6841static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6842 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6843 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6844 .recover_open = nfs4_open_reclaim,
6845 .recover_lock = nfs4_lock_reclaim,
591d71cb 6846 .establish_clid = nfs4_init_clientid,
90a16617 6847 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6848 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6849};
6850
591d71cb 6851#if defined(CONFIG_NFS_V4_1)
17280175 6852static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6853 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6854 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6855 .recover_open = nfs4_open_reclaim,
6856 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6857 .establish_clid = nfs41_init_clientid,
b4b82607 6858 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6859 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6860 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6861};
6862#endif /* CONFIG_NFS_V4_1 */
6863
17280175 6864static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6865 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6866 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6867 .recover_open = nfs4_open_expired,
6868 .recover_lock = nfs4_lock_expired,
6869 .establish_clid = nfs4_init_clientid,
90a16617 6870 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6871};
6872
6873#if defined(CONFIG_NFS_V4_1)
17280175 6874static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6875 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6876 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6877 .recover_open = nfs41_open_expired,
6878 .recover_lock = nfs41_lock_expired,
4d643d1d 6879 .establish_clid = nfs41_init_clientid,
b4b82607 6880 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6881};
591d71cb 6882#endif /* CONFIG_NFS_V4_1 */
1da177e4 6883
17280175 6884static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6885 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6886 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6887 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6888};
6889
6890#if defined(CONFIG_NFS_V4_1)
17280175 6891static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6892 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6893 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6894 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6895};
6896#endif
6897
97dc1359
TM		 6898static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6899 .minor_version = 0,
39c6daae
TM		 6900 .init_caps = NFS_CAP_READDIRPLUS
6901 | NFS_CAP_ATOMIC_OPEN
6902 | NFS_CAP_CHANGE_ATTR
6903 | NFS_CAP_POSIX_LOCK,
97dc1359 6904 .call_sync = _nfs4_call_sync,
36281caa 6905 .match_stateid = nfs4_match_stateid,
fca78d6d 6906 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6907 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6908 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6909 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6910};
6911
6912#if defined(CONFIG_NFS_V4_1)
6913static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6914 .minor_version = 1,
39c6daae
TM		 6915 .init_caps = NFS_CAP_READDIRPLUS
6916 | NFS_CAP_ATOMIC_OPEN
6917 | NFS_CAP_CHANGE_ATTR
3b66486c 6918 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 6919 | NFS_CAP_STATEID_NFSV41
6920 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 6921 .call_sync = nfs4_call_sync_sequence,
36281caa 6922 .match_stateid = nfs41_match_stateid,
fca78d6d 6923 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6924 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6925 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6926 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6927};
6928#endif
6929
97dc1359
TM		 6930const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6931 [0] = &nfs_v4_0_minor_ops,
6932#if defined(CONFIG_NFS_V4_1)
6933 [1] = &nfs_v4_1_minor_ops,
6934#endif
6935};
6936
73a79706
BS		 6937const struct inode_operations nfs4_dir_inode_operations = {
6938 .create = nfs_create,
6939 .lookup = nfs_lookup,
6940 .atomic_open = nfs_atomic_open,
6941 .link = nfs_link,
6942 .unlink = nfs_unlink,
6943 .symlink = nfs_symlink,
6944 .mkdir = nfs_mkdir,
6945 .rmdir = nfs_rmdir,
6946 .mknod = nfs_mknod,
6947 .rename = nfs_rename,
6948 .permission = nfs_permission,
6949 .getattr = nfs_getattr,
6950 .setattr = nfs_setattr,
6951 .getxattr = generic_getxattr,
6952 .setxattr = generic_setxattr,
6953 .listxattr = generic_listxattr,
6954 .removexattr = generic_removexattr,
6955};
6956
92e1d5be 6957static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6958 .permission = nfs_permission,
6959 .getattr = nfs_getattr,
6960 .setattr = nfs_setattr,
64c2ce8b
AK		 6961 .getxattr = generic_getxattr,
6962 .setxattr = generic_setxattr,
6963 .listxattr = generic_listxattr,
6964 .removexattr = generic_removexattr,
6b3b5496
BF		 6965};
6966
509de811 6967const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6968 .version = 4, /* protocol version */
6969 .dentry_ops = &nfs4_dentry_operations,
6970 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6971 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6972 .file_ops = &nfs4_file_operations,
1da177e4 6973 .getroot = nfs4_proc_get_root,
281cad46 6974 .submount = nfs4_submount,
ff9099f2 6975 .try_mount = nfs4_try_mount,
1da177e4
LT		 6976 .getattr = nfs4_proc_getattr,
6977 .setattr = nfs4_proc_setattr,
6978 .lookup = nfs4_proc_lookup,
6979 .access = nfs4_proc_access,
6980 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6981 .create = nfs4_proc_create,
6982 .remove = nfs4_proc_remove,
6983 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6984 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6985 .unlink_done = nfs4_proc_unlink_done,
6986 .rename = nfs4_proc_rename,
d3d4152a 6987 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6988 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6989 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6990 .link = nfs4_proc_link,
6991 .symlink = nfs4_proc_symlink,
6992 .mkdir = nfs4_proc_mkdir,
6993 .rmdir = nfs4_proc_remove,
6994 .readdir = nfs4_proc_readdir,
6995 .mknod = nfs4_proc_mknod,
6996 .statfs = nfs4_proc_statfs,
6997 .fsinfo = nfs4_proc_fsinfo,
6998 .pathconf = nfs4_proc_pathconf,
e9326dca 6999 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7000 .decode_dirent = nfs4_decode_dirent,
7001 .read_setup = nfs4_proc_read_setup,
1abb5088 7002 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7003 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7004 .read_done = nfs4_read_done,
1da177e4 7005 .write_setup = nfs4_proc_write_setup,
57208fa7 7006 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7007 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7008 .write_done = nfs4_write_done,
1da177e4 7009 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7010 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7011 .commit_done = nfs4_commit_done,
1da177e4 7012 .lock = nfs4_proc_lock,
e50a1c2e 7013 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7014 .close_context = nfs4_close_context,
2b484297 7015 .open_context = nfs4_atomic_open,
011e2a7f 7016 .have_delegation = nfs4_have_delegation,
57ec14c5 7017 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7018 .alloc_client = nfs4_alloc_client,
45a52a02 7019 .init_client = nfs4_init_client,
cdb7eced 7020 .free_client = nfs4_free_client,
1179acc6
BS		 7021 .create_server = nfs4_create_server,
7022 .clone_server = nfs_clone_server,
1da177e4
LT		 7023};
7024
64c2ce8b
AK		 7025static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7026 .prefix = XATTR_NAME_NFSV4_ACL,
7027 .list = nfs4_xattr_list_nfs4_acl,
7028 .get = nfs4_xattr_get_nfs4_acl,
7029 .set = nfs4_xattr_set_nfs4_acl,
7030};
7031
7032const struct xattr_handler *nfs4_xattr_handlers[] = {
7033 &nfs4_xattr_nfs4_acl_handler,
7034 NULL
7035};
7036
1da177e4
LT		 7037/*
7038 * Local variables:
7039 * c-basic-offset: 8
7040 * End:
7041 */
Linux 6.x block layer and io_uring tree(s)