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NFSv4: Servers should only check SETATTR stateid open mode on size change
[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;
ee3ae84e
TM		 2145 fmode_t fmode;
2146 bool truncate;
65e4308d 2147 int status;
1da177e4 2148
0e574af1 2149 nfs_fattr_init(fattr);
1da177e4 2150
ee3ae84e
TM		 2151 /* Servers should only apply open mode checks for file size changes */
2152 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2153 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2154
2155 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2156 /* Use that stateid */
2157 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2158 struct nfs_lockowner lockowner = {
2159 .l_owner = current->files,
2160 .l_pid = current->tgid,
2161 };
4fc8796d 2162 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2163 &lockowner);
08e9eac4 2164 } else
f597c537 2165 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2166
7c513058 2167 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2168 if (status == 0 && state != NULL)
2169 renew_lease(server, timestamp);
65e4308d 2170 return status;
1da177e4
LT		 2171}
2172
659bfcd6
TM		 2173static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2174 struct nfs_fattr *fattr, struct iattr *sattr,
2175 struct nfs4_state *state)
1da177e4 2176{
3e4f6290 2177 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2178 struct nfs4_exception exception = {
2179 .state = state,
3114ea7a 2180 .inode = inode,
a1d0b5ee 2181 };
1da177e4
LT		 2182 int err;
2183 do {
451146be
TM		 2184 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2185 switch (err) {
2186 case -NFS4ERR_OPENMODE:
2187 if (state && !(state->state & FMODE_WRITE)) {
2188 err = -EBADF;
2189 if (sattr->ia_valid & ATTR_OPEN)
2190 err = -EACCES;
2191 goto out;
2192 }
2193 }
2194 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2195 } while (exception.retry);
451146be 2196out:
1da177e4
LT		 2197 return err;
2198}
2199
2200struct nfs4_closedata {
2201 struct inode *inode;
2202 struct nfs4_state *state;
2203 struct nfs_closeargs arg;
2204 struct nfs_closeres res;
516a6af6 2205 struct nfs_fattr fattr;
26e976a8 2206 unsigned long timestamp;
f7e8917a
FI		 2207 bool roc;
2208 u32 roc_barrier;
1da177e4
LT		 2209};
2210
963d8fe5 2211static void nfs4_free_closedata(void *data)
9512135d 2212{
963d8fe5
TM		 2213 struct nfs4_closedata *calldata = data;
2214 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2215 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2216
f7e8917a
FI		 2217 if (calldata->roc)
2218 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2219 nfs4_put_open_state(calldata->state);
2220 nfs_free_seqid(calldata->arg.seqid);
9512135d 2221 nfs4_put_state_owner(sp);
322b2b90 2222 nfs_sb_deactive(sb);
9512135d
TM		 2223 kfree(calldata);
2224}
2225
88069f77
TM		 2226static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2227 fmode_t fmode)
2228{
2229 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2230 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2231 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2232 case FMODE_WRITE:
88069f77 2233 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2234 break;
2235 case FMODE_READ:
88069f77 2236 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2237 break;
2238 case 0:
2239 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2240 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2241 clear_bit(NFS_OPEN_STATE, &state->flags);
2242 }
88069f77
TM		 2243 spin_unlock(&state->owner->so_lock);
2244}
2245
963d8fe5 2246static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2247{
963d8fe5 2248 struct nfs4_closedata *calldata = data;
1da177e4 2249 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2250 struct nfs_server *server = NFS_SERVER(calldata->inode);
2251
a3ca5651 2252 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2253 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2254 return;
1da177e4
LT		 2255 /* hmm. we are done with the inode, and in the process of freeing
2256 * the state_owner. we keep this around to process errors
2257 */
1da177e4
LT		 2258 switch (task->tk_status) {
2259 case 0:
f7e8917a
FI		 2260 if (calldata->roc)
2261 pnfs_roc_set_barrier(state->inode,
2262 calldata->roc_barrier);
45328c35 2263 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2264 renew_lease(server, calldata->timestamp);
88069f77
TM		 2265 nfs4_close_clear_stateid_flags(state,
2266 calldata->arg.fmode);
1da177e4
LT		 2267 break;
2268 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2269 case -NFS4ERR_OLD_STATEID:
2270 case -NFS4ERR_BAD_STATEID:
1da177e4 2271 case -NFS4ERR_EXPIRED:
dc0b027d 2272 if (calldata->arg.fmode == 0)
9e33bed5 2273 break;
1da177e4 2274 default:
72211dbe
TM		 2275 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2276 rpc_restart_call_prepare(task);
1da177e4 2277 }
72211dbe 2278 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2279 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2280 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2281}
2282
4ce70ada 2283static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2284{
4ce70ada 2285 struct nfs4_closedata *calldata = data;
9512135d 2286 struct nfs4_state *state = calldata->state;
7fdab069 2287 struct inode *inode = calldata->inode;
88069f77 2288 int call_close = 0;
9512135d 2289
a3ca5651 2290 dprintk("%s: begin!\n", __func__);
963d8fe5 2291 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2292 goto out_wait;
003707c7 2293
88069f77
TM		 2294 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2295 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2296 spin_lock(&state->owner->so_lock);
003707c7 2297 /* Calculate the change in open mode */
e7616923 2298 if (state->n_rdwr == 0) {
003707c7 2299 if (state->n_rdonly == 0) {
88069f77
TM		 2300 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2301 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2302 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2303 }
2304 if (state->n_wronly == 0) {
88069f77
TM		 2305 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2306 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2307 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2308 }
e7616923 2309 }
5d422301
TM		 2310 if (!nfs4_valid_open_stateid(state))
2311 call_close = 0;
4cecb76f 2312 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2313
2314 if (!call_close) {
963d8fe5 2315 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2316 goto out_no_action;
9512135d 2317 }
88069f77 2318
f7e8917a 2319 if (calldata->arg.fmode == 0) {
88069f77 2320 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2321 if (calldata->roc &&
b9536ad5
AA		 2322 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2323 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2324 goto out_wait;
b9536ad5 2325 }
f7e8917a 2326 }
88069f77 2327
516a6af6 2328 nfs_fattr_init(calldata->res.fattr);
26e976a8 2329 calldata->timestamp = jiffies;
7fdab069 2330 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2331 &calldata->arg.seq_args,
2332 &calldata->res.seq_res,
2240a9e2
TM		 2333 task) != 0)
2334 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2335 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2336 return;
2337out_no_action:
2338 task->tk_action = NULL;
2339out_wait:
2340 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2341}
2342
963d8fe5 2343static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2344 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2345 .rpc_call_done = nfs4_close_done,
2346 .rpc_release = nfs4_free_closedata,
2347};
2348
1da177e4
LT		 2349/*
2350 * It is possible for data to be read/written from a mem-mapped file
2351 * after the sys_close call (which hits the vfs layer as a flush).
2352 * This means that we can't safely call nfsv4 close on a file until
2353 * the inode is cleared. This in turn means that we are not good
2354 * NFSv4 citizens - we do not indicate to the server to update the file's
2355 * share state even when we are done with one of the three share
2356 * stateid's in the inode.
2357 *
2358 * NOTE: Caller must be holding the sp->so_owner semaphore!
2359 */
1f7977c1 2360int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2361{
4a35bd41 2362 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2363 struct nfs4_closedata *calldata;
b39e625b
TM		 2364 struct nfs4_state_owner *sp = state->owner;
2365 struct rpc_task *task;
5138fde0
TM		 2366 struct rpc_message msg = {
2367 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2368 .rpc_cred = state->owner->so_cred,
2369 };
c970aa85
TM		 2370 struct rpc_task_setup task_setup_data = {
2371 .rpc_client = server->client,
5138fde0 2372 .rpc_message = &msg,
c970aa85 2373 .callback_ops = &nfs4_close_ops,
101070ca 2374 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2375 .flags = RPC_TASK_ASYNC,
2376 };
9512135d 2377 int status = -ENOMEM;
1da177e4 2378
8535b2be 2379 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2380 if (calldata == NULL)
9512135d 2381 goto out;
9d12b216 2382 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2383 calldata->inode = state->inode;
1da177e4 2384 calldata->state = state;
4a35bd41 2385 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2386 calldata->arg.stateid = &state->open_stateid;
1da177e4 2387 /* Serialization for the sequence id */
8535b2be 2388 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2389 if (calldata->arg.seqid == NULL)
2390 goto out_free_calldata;
dc0b027d 2391 calldata->arg.fmode = 0;
a65318bf 2392 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2393 calldata->res.fattr = &calldata->fattr;
c1d51931 2394 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2395 calldata->res.server = server;
1f7977c1 2396 calldata->roc = pnfs_roc(state->inode);
643168c2 2397 nfs_sb_active(calldata->inode->i_sb);
9512135d 2398
1174dd1f
TM		 2399 msg.rpc_argp = &calldata->arg;
2400 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2401 task_setup_data.callback_data = calldata;
2402 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2403 if (IS_ERR(task))
2404 return PTR_ERR(task);
a49c3c77
TM		 2405 status = 0;
2406 if (wait)
2407 status = rpc_wait_for_completion_task(task);
b39e625b 2408 rpc_put_task(task);
a49c3c77 2409 return status;
9512135d
TM		 2410out_free_calldata:
2411 kfree(calldata);
2412out:
b39e625b
TM		 2413 nfs4_put_open_state(state);
2414 nfs4_put_state_owner(sp);
9512135d 2415 return status;
1da177e4
LT		 2416}
2417
2b484297 2418static struct inode *
cd9a1c0e 2419nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2420{
1da177e4 2421 struct nfs4_state *state;
1da177e4 2422
565277f6 2423 /* Protect against concurrent sillydeletes */
82be417a
AA		 2424 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2425 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2426 if (IS_ERR(state))
2427 return ERR_CAST(state);
cd9a1c0e 2428 ctx->state = state;
f46e0bd3 2429 return igrab(state->inode);
1da177e4
LT		 2430}
2431
1185a552 2432static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2433{
2434 if (ctx->state == NULL)
2435 return;
2436 if (is_sync)
643168c2 2437 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2438 else
643168c2 2439 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2440}
1da177e4
LT		 2441
2442static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2443{
43652ad5
BH		 2444 struct nfs4_server_caps_arg args = {
2445 .fhandle = fhandle,
2446 };
1da177e4
LT		 2447 struct nfs4_server_caps_res res = {};
2448 struct rpc_message msg = {
2449 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2450 .rpc_argp = &args,
1da177e4
LT		 2451 .rpc_resp = &res,
2452 };
2453 int status;
2454
7c513058 2455 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2456 if (status == 0) {
2457 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2458 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2459 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2460 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2461 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2462 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2463 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2464 server->caps |= NFS_CAP_ACLS;
2465 if (res.has_links != 0)
2466 server->caps |= NFS_CAP_HARDLINKS;
2467 if (res.has_symlinks != 0)
2468 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2469 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2470 server->caps |= NFS_CAP_FILEID;
2471 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2472 server->caps |= NFS_CAP_MODE;
2473 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2474 server->caps |= NFS_CAP_NLINK;
2475 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2476 server->caps |= NFS_CAP_OWNER;
2477 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2478 server->caps |= NFS_CAP_OWNER_GROUP;
2479 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2480 server->caps |= NFS_CAP_ATIME;
2481 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2482 server->caps |= NFS_CAP_CTIME;
2483 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2484 server->caps |= NFS_CAP_MTIME;
2485
a65318bf
TM		 2486 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2487 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2488 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2489 server->acl_bitmask = res.acl_bitmask;
264e6351 2490 server->fh_expire_type = res.fh_expire_type;
1da177e4 2491 }
cccef3b9 2492
1da177e4
LT		 2493 return status;
2494}
2495
55a97593 2496int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2497{
2498 struct nfs4_exception exception = { };
2499 int err;
2500 do {
2501 err = nfs4_handle_exception(server,
2502 _nfs4_server_capabilities(server, fhandle),
2503 &exception);
2504 } while (exception.retry);
2505 return err;
2506}
2507
2508static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2509 struct nfs_fsinfo *info)
2510{
1da177e4
LT		 2511 struct nfs4_lookup_root_arg args = {
2512 .bitmask = nfs4_fattr_bitmap,
2513 };
2514 struct nfs4_lookup_res res = {
2515 .server = server,
0e574af1 2516 .fattr = info->fattr,
1da177e4
LT		 2517 .fh = fhandle,
2518 };
2519 struct rpc_message msg = {
2520 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2521 .rpc_argp = &args,
2522 .rpc_resp = &res,
2523 };
008f55d0 2524
0e574af1 2525 nfs_fattr_init(info->fattr);
7c513058 2526 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2527}
2528
2529static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2530 struct nfs_fsinfo *info)
2531{
2532 struct nfs4_exception exception = { };
2533 int err;
2534 do {
fb8a5ba8
BS		 2535 err = _nfs4_lookup_root(server, fhandle, info);
2536 switch (err) {
2537 case 0:
2538 case -NFS4ERR_WRONGSEC:
05e9cfb4 2539 goto out;
fb8a5ba8
BS		 2540 default:
2541 err = nfs4_handle_exception(server, err, &exception);
2542 }
1da177e4 2543 } while (exception.retry);
05e9cfb4 2544out:
1da177e4
LT		 2545 return err;
2546}
2547
8f70e95f
BS		 2548static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2549 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2550{
2551 struct rpc_auth *auth;
2552 int ret;
2553
2554 auth = rpcauth_create(flavor, server->client);
e8d920c5 2555 if (IS_ERR(auth)) {
75bc8821 2556 ret = -EACCES;
8f70e95f
BS		 2557 goto out;
2558 }
2559 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2560out:
2561 return ret;
2562}
2563
9a744ba3
CL		 2564/*
2565 * Retry pseudoroot lookup with various security flavors. We do this when:
2566 *
2567 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2568 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2569 *
2570 * Returns zero on success, or a negative NFS4ERR value, or a
2571 * negative errno value.
2572 */
801a16dc 2573static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2574 struct nfs_fsinfo *info)
1da177e4 2575{
9a744ba3
CL		 2576 /* Per 3530bis 15.33.5 */
2577 static const rpc_authflavor_t flav_array[] = {
2578 RPC_AUTH_GSS_KRB5P,
2579 RPC_AUTH_GSS_KRB5I,
2580 RPC_AUTH_GSS_KRB5,
c4eafe11 2581 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2582 RPC_AUTH_NULL,
2583 };
2584 int status = -EPERM;
2585 size_t i;
6a1a1e34 2586
9a744ba3 2587 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2588 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2589 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2590 continue;
2591 break;
8f70e95f 2592 }
9a744ba3 2593
fb8a5ba8
BS		 2594 /*
2595 * -EACCESS could mean that the user doesn't have correct permissions
2596 * to access the mount. It could also mean that we tried to mount
2597 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2598 * existing mount programs don't handle -EACCES very well so it should
2599 * be mapped to -EPERM instead.
2600 */
2601 if (status == -EACCES)
2602 status = -EPERM;
801a16dc
BS		 2603 return status;
2604}
2605
2ed4b95b
CL		 2606static int nfs4_do_find_root_sec(struct nfs_server *server,
2607 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2608{
2609 int mv = server->nfs_client->cl_minorversion;
2610 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2611}
2612
2613/**
2614 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2615 * @server: initialized nfs_server handle
2616 * @fhandle: we fill in the pseudo-fs root file handle
2617 * @info: we fill in an FSINFO struct
2618 *
2619 * Returns zero on success, or a negative errno.
801a16dc 2620 */
3028eb2b
BS		 2621int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2622 struct nfs_fsinfo *info)
801a16dc 2623{
2ed4b95b
CL		 2624 int status;
2625
2626 status = nfs4_lookup_root(server, fhandle, info);
2627 if ((status == -NFS4ERR_WRONGSEC) &&
2628 !(server->flags & NFS_MOUNT_SECFLAVOUR))
2629 status = nfs4_do_find_root_sec(server, fhandle, info);
2630
1da177e4
LT		 2631 if (status == 0)
2632 status = nfs4_server_capabilities(server, fhandle);
2633 if (status == 0)
2634 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2635
c12e87f4 2636 return nfs4_map_errors(status);
1da177e4
LT		 2637}
2638
bae36241
BS		 2639static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2640 struct nfs_fsinfo *info)
2641{
2642 int error;
2643 struct nfs_fattr *fattr = info->fattr;
2644
2645 error = nfs4_server_capabilities(server, mntfh);
2646 if (error < 0) {
2647 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2648 return error;
2649 }
2650
2651 error = nfs4_proc_getattr(server, mntfh, fattr);
2652 if (error < 0) {
2653 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2654 return error;
2655 }
2656
2657 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2658 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2659 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2660
2661 return error;
2662}
2663
6b97fd3d
MN		 2664/*
2665 * Get locations and (maybe) other attributes of a referral.
2666 * Note that we'll actually follow the referral later when
2667 * we detect fsid mismatch in inode revalidation
2668 */
f05d147f
BS		 2669static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2670 const struct qstr *name, struct nfs_fattr *fattr,
2671 struct nfs_fh *fhandle)
6b97fd3d
MN		 2672{
2673 int status = -ENOMEM;
2674 struct page *page = NULL;
2675 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2676
2677 page = alloc_page(GFP_KERNEL);
2678 if (page == NULL)
2679 goto out;
2680 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2681 if (locations == NULL)
2682 goto out;
2683
f05d147f 2684 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2685 if (status != 0)
2686 goto out;
2687 /* Make sure server returned a different fsid for the referral */
2688 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2689 dprintk("%s: server did not return a different fsid for"
2690 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2691 status = -EIO;
2692 goto out;
2693 }
533eb461
AA		 2694 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2695 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2696
533eb461 2697 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2698 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2699 memset(fhandle, 0, sizeof(struct nfs_fh));
2700out:
2701 if (page)
2702 __free_page(page);
5d7ca35a 2703 kfree(locations);
6b97fd3d
MN		 2704 return status;
2705}
2706
1da177e4
LT		 2707static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2708{
2709 struct nfs4_getattr_arg args = {
2710 .fh = fhandle,
2711 .bitmask = server->attr_bitmask,
2712 };
2713 struct nfs4_getattr_res res = {
2714 .fattr = fattr,
2715 .server = server,
2716 };
2717 struct rpc_message msg = {
2718 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2719 .rpc_argp = &args,
2720 .rpc_resp = &res,
2721 };
2722
0e574af1 2723 nfs_fattr_init(fattr);
7c513058 2724 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2725}
2726
2727static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2728{
2729 struct nfs4_exception exception = { };
2730 int err;
2731 do {
2732 err = nfs4_handle_exception(server,
2733 _nfs4_proc_getattr(server, fhandle, fattr),
2734 &exception);
2735 } while (exception.retry);
2736 return err;
2737}
2738
2739/*
2740 * The file is not closed if it is opened due to the a request to change
2741 * the size of the file. The open call will not be needed once the
2742 * VFS layer lookup-intents are implemented.
2743 *
2744 * Close is called when the inode is destroyed.
2745 * If we haven't opened the file for O_WRONLY, we
2746 * need to in the size_change case to obtain a stateid.
2747 *
2748 * Got race?
2749 * Because OPEN is always done by name in nfsv4, it is
2750 * possible that we opened a different file by the same
2751 * name. We can recognize this race condition, but we
2752 * can't do anything about it besides returning an error.
2753 *
2754 * This will be fixed with VFS changes (lookup-intent).
2755 */
2756static int
2757nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2758 struct iattr *sattr)
2759{
08e9eac4 2760 struct inode *inode = dentry->d_inode;
659bfcd6 2761 struct rpc_cred *cred = NULL;
d530838b 2762 struct nfs4_state *state = NULL;
1da177e4
LT		 2763 int status;
2764
8a1636c4 2765 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2766 pnfs_commit_and_return_layout(inode);
8a1636c4 2767
0e574af1 2768 nfs_fattr_init(fattr);
1da177e4 2769
2669940d
AA		 2770 /* Deal with open(O_TRUNC) */
2771 if (sattr->ia_valid & ATTR_OPEN)
2772 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2773
2774 /* Optimization: if the end result is no change, don't RPC */
2775 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2776 return 0;
2777
d530838b 2778 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2779 if (sattr->ia_valid & ATTR_FILE) {
2780 struct nfs_open_context *ctx;
2781
2782 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2783 if (ctx) {
2784 cred = ctx->cred;
2785 state = ctx->state;
2786 }
659bfcd6 2787 }
08e9eac4 2788
659bfcd6 2789 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2790 if (status == 0)
2791 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2792 return status;
2793}
2794
0c2e53f1
TM		 2795static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2796 const struct qstr *name, struct nfs_fh *fhandle,
2797 struct nfs_fattr *fattr)
2b3de441 2798{
0c2e53f1 2799 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2800 int status;
2801 struct nfs4_lookup_arg args = {
2802 .bitmask = server->attr_bitmask,
0c2e53f1 2803 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2804 .name = name,
2805 };
2806 struct nfs4_lookup_res res = {
2807 .server = server,
2808 .fattr = fattr,
2809 .fh = fhandle,
2810 };
2811 struct rpc_message msg = {
2812 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2813 .rpc_argp = &args,
2814 .rpc_resp = &res,
2815 };
2816
2817 nfs_fattr_init(fattr);
2818
1da177e4 2819 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2820 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2821 dprintk("NFS reply lookup: %d\n", status);
2822 return status;
2823}
2824
72de53ec 2825static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2826{
7ebb9315 2827 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2828 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2829 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2830 fattr->nlink = 2;
2831}
2832
72de53ec
BS		 2833static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2834 struct qstr *name, struct nfs_fh *fhandle,
2835 struct nfs_fattr *fattr)
1da177e4
LT		 2836{
2837 struct nfs4_exception exception = { };
72de53ec 2838 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2839 int err;
2840 do {
72de53ec
BS		 2841 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2842 switch (err) {
08ef7bd3 2843 case -NFS4ERR_BADNAME:
72de53ec
BS		 2844 err = -ENOENT;
2845 goto out;
0c2e53f1 2846 case -NFS4ERR_MOVED:
f05d147f 2847 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2848 goto out;
0c2e53f1 2849 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2850 err = -EPERM;
2851 if (client != *clnt)
2852 goto out;
2853
2854 client = nfs4_create_sec_client(client, dir, name);
2855 if (IS_ERR(client))
2856 return PTR_ERR(client);
2857
2858 exception.retry = 1;
2859 break;
2860 default:
2861 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2862 }
1da177e4 2863 } while (exception.retry);
72de53ec
BS		 2864
2865out:
2866 if (err == 0)
2867 *clnt = client;
2868 else if (client != *clnt)
2869 rpc_shutdown_client(client);
2870
1da177e4
LT		 2871 return err;
2872}
2873
80a16b21 2874static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2875 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2876{
2877 int status;
2878 struct rpc_clnt *client = NFS_CLIENT(dir);
2879
2880 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2881 if (client != NFS_CLIENT(dir)) {
2882 rpc_shutdown_client(client);
2883 nfs_fixup_secinfo_attributes(fattr);
2884 }
2885 return status;
2886}
2887
f05d147f
BS		 2888struct rpc_clnt *
2889nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2890 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2891{
2892 int status;
2893 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2894
2895 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2896 if (status < 0) {
2897 rpc_shutdown_client(client);
2898 return ERR_PTR(status);
2899 }
2900 return client;
2901}
2902
1da177e4
LT		 2903static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2904{
76b32999 2905 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2906 struct nfs4_accessargs args = {
2907 .fh = NFS_FH(inode),
a4980e78 2908 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2909 };
2910 struct nfs4_accessres res = {
2911 .server = server,
1da177e4 2912 };
1da177e4
LT		 2913 struct rpc_message msg = {
2914 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2915 .rpc_argp = &args,
2916 .rpc_resp = &res,
2917 .rpc_cred = entry->cred,
2918 };
2919 int mode = entry->mask;
2920 int status;
2921
2922 /*
2923 * Determine which access bits we want to ask for...
2924 */
2925 if (mode & MAY_READ)
2926 args.access |= NFS4_ACCESS_READ;
2927 if (S_ISDIR(inode->i_mode)) {
2928 if (mode & MAY_WRITE)
2929 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2930 if (mode & MAY_EXEC)
2931 args.access |= NFS4_ACCESS_LOOKUP;
2932 } else {
2933 if (mode & MAY_WRITE)
2934 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2935 if (mode & MAY_EXEC)
2936 args.access |= NFS4_ACCESS_EXECUTE;
2937 }
c407d41a
TM		 2938
2939 res.fattr = nfs_alloc_fattr();
2940 if (res.fattr == NULL)
2941 return -ENOMEM;
2942
7c513058 2943 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2944 if (!status) {
6168f62c 2945 nfs_access_set_mask(entry, res.access);
c407d41a 2946 nfs_refresh_inode(inode, res.fattr);
1da177e4 2947 }
c407d41a 2948 nfs_free_fattr(res.fattr);
1da177e4
LT		 2949 return status;
2950}
2951
2952static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2953{
2954 struct nfs4_exception exception = { };
2955 int err;
2956 do {
2957 err = nfs4_handle_exception(NFS_SERVER(inode),
2958 _nfs4_proc_access(inode, entry),
2959 &exception);
2960 } while (exception.retry);
2961 return err;
2962}
2963
2964/*
2965 * TODO: For the time being, we don't try to get any attributes
2966 * along with any of the zero-copy operations READ, READDIR,
2967 * READLINK, WRITE.
2968 *
2969 * In the case of the first three, we want to put the GETATTR
2970 * after the read-type operation -- this is because it is hard
2971 * to predict the length of a GETATTR response in v4, and thus
2972 * align the READ data correctly. This means that the GETATTR
2973 * may end up partially falling into the page cache, and we should
2974 * shift it into the 'tail' of the xdr_buf before processing.
2975 * To do this efficiently, we need to know the total length
2976 * of data received, which doesn't seem to be available outside
2977 * of the RPC layer.
2978 *
2979 * In the case of WRITE, we also want to put the GETATTR after
2980 * the operation -- in this case because we want to make sure
140150db 2981 * we get the post-operation mtime and size.
1da177e4
LT		 2982 *
2983 * Both of these changes to the XDR layer would in fact be quite
2984 * minor, but I decided to leave them for a subsequent patch.
2985 */
2986static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2987 unsigned int pgbase, unsigned int pglen)
2988{
2989 struct nfs4_readlink args = {
2990 .fh = NFS_FH(inode),
2991 .pgbase = pgbase,
2992 .pglen = pglen,
2993 .pages = &page,
2994 };
f50c7000 2995 struct nfs4_readlink_res res;
1da177e4
LT		 2996 struct rpc_message msg = {
2997 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2998 .rpc_argp = &args,
f50c7000 2999 .rpc_resp = &res,
1da177e4
LT		 3000 };
3001
7c513058 3002 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3003}
3004
3005static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3006 unsigned int pgbase, unsigned int pglen)
3007{
3008 struct nfs4_exception exception = { };
3009 int err;
3010 do {
3011 err = nfs4_handle_exception(NFS_SERVER(inode),
3012 _nfs4_proc_readlink(inode, page, pgbase, pglen),
3013 &exception);
3014 } while (exception.retry);
3015 return err;
3016}
3017
1da177e4 3018/*
8867fe58 3019 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3020 */
1da177e4
LT		 3021static int
3022nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3023 int flags)
1da177e4 3024{
8867fe58 3025 struct nfs_open_context *ctx;
1da177e4 3026 struct nfs4_state *state;
1da177e4
LT		 3027 int status = 0;
3028
8867fe58
MS		 3029 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3030 if (IS_ERR(ctx))
3031 return PTR_ERR(ctx);
3032
a8a5da99 3033 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 3034 state = nfs4_do_open(dir, dentry, ctx->mode,
3035 flags, sattr, ctx->cred,
3036 &ctx->mdsthreshold);
d4d9cdcb 3037 d_drop(dentry);
1da177e4
LT		 3038 if (IS_ERR(state)) {
3039 status = PTR_ERR(state);
c0204fd2 3040 goto out;
1da177e4 3041 }
d4d9cdcb 3042 d_add(dentry, igrab(state->inode));
d75340cc 3043 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 3044 ctx->state = state;
1da177e4 3045out:
8867fe58 3046 put_nfs_open_context(ctx);
1da177e4
LT		 3047 return status;
3048}
3049
3050static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3051{
16e42959 3052 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3053 struct nfs_removeargs args = {
1da177e4 3054 .fh = NFS_FH(dir),
26fe5750 3055 .name = *name,
16e42959 3056 };
4fdc17b2 3057 struct nfs_removeres res = {
16e42959 3058 .server = server,
1da177e4 3059 };
1da177e4 3060 struct rpc_message msg = {
4fdc17b2
TM		 3061 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3062 .rpc_argp = &args,
3063 .rpc_resp = &res,
1da177e4 3064 };
778d2817 3065 int status;
1da177e4 3066
7c513058 3067 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3068 if (status == 0)
16e42959 3069 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3070 return status;
3071}
3072
3073static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3074{
3075 struct nfs4_exception exception = { };
3076 int err;
3077 do {
3078 err = nfs4_handle_exception(NFS_SERVER(dir),
3079 _nfs4_proc_remove(dir, name),
3080 &exception);
3081 } while (exception.retry);
3082 return err;
3083}
3084
e4eff1a6 3085static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3086{
e4eff1a6
TM		 3087 struct nfs_server *server = NFS_SERVER(dir);
3088 struct nfs_removeargs *args = msg->rpc_argp;
3089 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3090
e4eff1a6 3091 res->server = server;
1da177e4 3092 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3093 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 3094}
3095
34e137cc
BS		 3096static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3097{
d9afbd1b
TM		 3098 nfs4_setup_sequence(NFS_SERVER(data->dir),
3099 &data->args.seq_args,
3100 &data->res.seq_res,
3101 task);
1da177e4
LT		 3102}
3103
e4eff1a6 3104static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3105{
e4eff1a6
TM		 3106 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3107
14516c3a
TM		 3108 if (!nfs4_sequence_done(task, &res->seq_res))
3109 return 0;
9e33bed5 3110 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3111 return 0;
3112 update_changeattr(dir, &res->cinfo);
e4eff1a6 3113 return 1;
1da177e4
LT		 3114}
3115
d3d4152a
JL		 3116static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3117{
3118 struct nfs_server *server = NFS_SERVER(dir);
3119 struct nfs_renameargs *arg = msg->rpc_argp;
3120 struct nfs_renameres *res = msg->rpc_resp;
3121
3122 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3123 res->server = server;
9d12b216 3124 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3125}
3126
c6bfa1a1
BS		 3127static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3128{
d9afbd1b
TM		 3129 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3130 &data->args.seq_args,
3131 &data->res.seq_res,
3132 task);
d3d4152a
JL		 3133}
3134
3135static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3136 struct inode *new_dir)
3137{
3138 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3139
3140 if (!nfs4_sequence_done(task, &res->seq_res))
3141 return 0;
3142 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3143 return 0;
3144
3145 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3146 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3147 return 1;
3148}
3149
1da177e4
LT		 3150static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3151 struct inode *new_dir, struct qstr *new_name)
3152{
6caf2c82 3153 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3154 struct nfs_renameargs arg = {
1da177e4
LT		 3155 .old_dir = NFS_FH(old_dir),
3156 .new_dir = NFS_FH(new_dir),
3157 .old_name = old_name,
3158 .new_name = new_name,
6caf2c82 3159 };
e8582a8b 3160 struct nfs_renameres res = {
6caf2c82 3161 .server = server,
1da177e4 3162 };
1da177e4
LT		 3163 struct rpc_message msg = {
3164 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3165 .rpc_argp = &arg,
3166 .rpc_resp = &res,
3167 };
011fff72 3168 int status = -ENOMEM;
1da177e4 3169
7c513058 3170 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3171 if (!status) {
3172 update_changeattr(old_dir, &res.old_cinfo);
3173 update_changeattr(new_dir, &res.new_cinfo);
3174 }
3175 return status;
3176}
3177
3178static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3179 struct inode *new_dir, struct qstr *new_name)
3180{
3181 struct nfs4_exception exception = { };
3182 int err;
3183 do {
3184 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3185 _nfs4_proc_rename(old_dir, old_name,
3186 new_dir, new_name),
3187 &exception);
3188 } while (exception.retry);
3189 return err;
3190}
3191
3192static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3193{
91ba2eee 3194 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3195 struct nfs4_link_arg arg = {
3196 .fh = NFS_FH(inode),
3197 .dir_fh = NFS_FH(dir),
3198 .name = name,
91ba2eee
TM		 3199 .bitmask = server->attr_bitmask,
3200 };
91ba2eee
TM		 3201 struct nfs4_link_res res = {
3202 .server = server,
1da177e4 3203 };
1da177e4
LT		 3204 struct rpc_message msg = {
3205 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3206 .rpc_argp = &arg,
91ba2eee 3207 .rpc_resp = &res,
1da177e4 3208 };
136f2627
TM		 3209 int status = -ENOMEM;
3210
3211 res.fattr = nfs_alloc_fattr();
778d2817 3212 if (res.fattr == NULL)
136f2627 3213 goto out;
1da177e4 3214
7c513058 3215 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3216 if (!status) {
3217 update_changeattr(dir, &res.cinfo);
73a3d07c 3218 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3219 }
136f2627 3220out:
136f2627 3221 nfs_free_fattr(res.fattr);
1da177e4
LT		 3222 return status;
3223}
3224
3225static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3226{
3227 struct nfs4_exception exception = { };
3228 int err;
3229 do {
3230 err = nfs4_handle_exception(NFS_SERVER(inode),
3231 _nfs4_proc_link(inode, dir, name),
3232 &exception);
3233 } while (exception.retry);
3234 return err;
3235}
3236
57dc9a57
TM		 3237struct nfs4_createdata {
3238 struct rpc_message msg;
3239 struct nfs4_create_arg arg;
3240 struct nfs4_create_res res;
3241 struct nfs_fh fh;
3242 struct nfs_fattr fattr;
57dc9a57
TM		 3243};
3244
3245static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3246 struct qstr *name, struct iattr *sattr, u32 ftype)
3247{
3248 struct nfs4_createdata *data;
3249
3250 data = kzalloc(sizeof(*data), GFP_KERNEL);
3251 if (data != NULL) {
3252 struct nfs_server *server = NFS_SERVER(dir);
3253
3254 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3255 data->msg.rpc_argp = &data->arg;
3256 data->msg.rpc_resp = &data->res;
3257 data->arg.dir_fh = NFS_FH(dir);
3258 data->arg.server = server;
3259 data->arg.name = name;
3260 data->arg.attrs = sattr;
3261 data->arg.ftype = ftype;
3262 data->arg.bitmask = server->attr_bitmask;
3263 data->res.server = server;
3264 data->res.fh = &data->fh;
3265 data->res.fattr = &data->fattr;
57dc9a57 3266 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3267 }
3268 return data;
3269}
3270
3271static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3272{
7c513058 3273 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3274 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3275 if (status == 0) {
3276 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3277 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3278 }
3279 return status;
3280}
3281
3282static void nfs4_free_createdata(struct nfs4_createdata *data)
3283{
3284 kfree(data);
3285}
3286
4f390c15 3287static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3288 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3289{
57dc9a57
TM		 3290 struct nfs4_createdata *data;
3291 int status = -ENAMETOOLONG;
1da177e4 3292
94a6d753 3293 if (len > NFS4_MAXPATHLEN)
57dc9a57 3294 goto out;
4f390c15 3295
57dc9a57
TM		 3296 status = -ENOMEM;
3297 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3298 if (data == NULL)
3299 goto out;
3300
3301 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3302 data->arg.u.symlink.pages = &page;
3303 data->arg.u.symlink.len = len;
1da177e4 3304
57dc9a57
TM		 3305 status = nfs4_do_create(dir, dentry, data);
3306
3307 nfs4_free_createdata(data);
3308out:
1da177e4
LT		 3309 return status;
3310}
3311
4f390c15 3312static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3313 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3314{
3315 struct nfs4_exception exception = { };
3316 int err;
3317 do {
3318 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3319 _nfs4_proc_symlink(dir, dentry, page,
3320 len, sattr),
1da177e4
LT		 3321 &exception);
3322 } while (exception.retry);
3323 return err;
3324}
3325
3326static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3327 struct iattr *sattr)
3328{
57dc9a57
TM		 3329 struct nfs4_createdata *data;
3330 int status = -ENOMEM;
1da177e4 3331
57dc9a57
TM		 3332 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3333 if (data == NULL)
3334 goto out;
3335
3336 status = nfs4_do_create(dir, dentry, data);
3337
3338 nfs4_free_createdata(data);
3339out:
1da177e4
LT		 3340 return status;
3341}
3342
3343static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3344 struct iattr *sattr)
3345{
3346 struct nfs4_exception exception = { };
3347 int err;
a8a5da99
AK		 3348
3349 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3350 do {
3351 err = nfs4_handle_exception(NFS_SERVER(dir),
3352 _nfs4_proc_mkdir(dir, dentry, sattr),
3353 &exception);
3354 } while (exception.retry);
3355 return err;
3356}
3357
3358static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3359 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3360{
3361 struct inode *dir = dentry->d_inode;
3362 struct nfs4_readdir_arg args = {
3363 .fh = NFS_FH(dir),
56e4ebf8 3364 .pages = pages,
1da177e4
LT		 3365 .pgbase = 0,
3366 .count = count,
96d25e53 3367 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3368 .plus = plus,
1da177e4
LT		 3369 };
3370 struct nfs4_readdir_res res;
3371 struct rpc_message msg = {
3372 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3373 .rpc_argp = &args,
3374 .rpc_resp = &res,
3375 .rpc_cred = cred,
3376 };
3377 int status;
3378
3110ff80 3379 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3380 dentry->d_parent->d_name.name,
3381 dentry->d_name.name,
3382 (unsigned long long)cookie);
c3f52af3 3383 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3384 res.pgbase = args.pgbase;
7c513058 3385 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3386 if (status >= 0) {
c3f52af3 3387 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3388 status += args.pgbase;
3389 }
c4812998
TM		 3390
3391 nfs_invalidate_atime(dir);
3392
3110ff80 3393 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3394 return status;
3395}
3396
3397static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3398 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3399{
3400 struct nfs4_exception exception = { };
3401 int err;
3402 do {
3403 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3404 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3405 pages, count, plus),
1da177e4
LT		 3406 &exception);
3407 } while (exception.retry);
3408 return err;
3409}
3410
3411static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3412 struct iattr *sattr, dev_t rdev)
3413{
57dc9a57
TM		 3414 struct nfs4_createdata *data;
3415 int mode = sattr->ia_mode;
3416 int status = -ENOMEM;
1da177e4 3417
57dc9a57
TM		 3418 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3419 if (data == NULL)
3420 goto out;
3421
1da177e4 3422 if (S_ISFIFO(mode))
57dc9a57 3423 data->arg.ftype = NF4FIFO;
1da177e4 3424 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3425 data->arg.ftype = NF4BLK;
3426 data->arg.u.device.specdata1 = MAJOR(rdev);
3427 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3428 }
3429 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3430 data->arg.ftype = NF4CHR;
3431 data->arg.u.device.specdata1 = MAJOR(rdev);
3432 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3433 } else if (!S_ISSOCK(mode)) {
3434 status = -EINVAL;
3435 goto out_free;
1da177e4 3436 }
1da177e4 3437
57dc9a57 3438 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3439out_free:
57dc9a57
TM		 3440 nfs4_free_createdata(data);
3441out:
1da177e4
LT		 3442 return status;
3443}
3444
3445static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3446 struct iattr *sattr, dev_t rdev)
3447{
3448 struct nfs4_exception exception = { };
3449 int err;
a8a5da99
AK		 3450
3451 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3452 do {
3453 err = nfs4_handle_exception(NFS_SERVER(dir),
3454 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3455 &exception);
3456 } while (exception.retry);
3457 return err;
3458}
3459
3460static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3461 struct nfs_fsstat *fsstat)
3462{
3463 struct nfs4_statfs_arg args = {
3464 .fh = fhandle,
3465 .bitmask = server->attr_bitmask,
3466 };
24ad148a
BH		 3467 struct nfs4_statfs_res res = {
3468 .fsstat = fsstat,
3469 };
1da177e4
LT		 3470 struct rpc_message msg = {
3471 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3472 .rpc_argp = &args,
24ad148a 3473 .rpc_resp = &res,
1da177e4
LT		 3474 };
3475
0e574af1 3476 nfs_fattr_init(fsstat->fattr);
7c513058 3477 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3478}
3479
3480static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3481{
3482 struct nfs4_exception exception = { };
3483 int err;
3484 do {
3485 err = nfs4_handle_exception(server,
3486 _nfs4_proc_statfs(server, fhandle, fsstat),
3487 &exception);
3488 } while (exception.retry);
3489 return err;
3490}
3491
3492static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3493 struct nfs_fsinfo *fsinfo)
3494{
3495 struct nfs4_fsinfo_arg args = {
3496 .fh = fhandle,
3497 .bitmask = server->attr_bitmask,
3498 };
3dda5e43
BH		 3499 struct nfs4_fsinfo_res res = {
3500 .fsinfo = fsinfo,
3501 };
1da177e4
LT		 3502 struct rpc_message msg = {
3503 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3504 .rpc_argp = &args,
3dda5e43 3505 .rpc_resp = &res,
1da177e4
LT		 3506 };
3507
7c513058 3508 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3509}
3510
3511static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3512{
3513 struct nfs4_exception exception = { };
83ca7f5a 3514 unsigned long now = jiffies;
1da177e4
LT		 3515 int err;
3516
3517 do {
83ca7f5a
CL		 3518 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
3519 if (err == 0) {
3520 struct nfs_client *clp = server->nfs_client;
3521
3522 spin_lock(&clp->cl_lock);
3523 clp->cl_lease_time = fsinfo->lease_time * HZ;
3524 clp->cl_last_renewal = now;
3525 spin_unlock(&clp->cl_lock);
3526 break;
3527 }
3528 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3529 } while (exception.retry);
3530 return err;
3531}
3532
3533static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3534{
e38eb650
BS		 3535 int error;
3536
0e574af1 3537 nfs_fattr_init(fsinfo->fattr);
e38eb650 3538 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3539 if (error == 0) {
3540 /* block layout checks this! */
3541 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3542 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3543 }
e38eb650
BS		 3544
3545 return error;
1da177e4
LT		 3546}
3547
3548static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3549 struct nfs_pathconf *pathconf)
3550{
3551 struct nfs4_pathconf_arg args = {
3552 .fh = fhandle,
3553 .bitmask = server->attr_bitmask,
3554 };
d45b2989
BH		 3555 struct nfs4_pathconf_res res = {
3556 .pathconf = pathconf,
3557 };
1da177e4
LT		 3558 struct rpc_message msg = {
3559 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3560 .rpc_argp = &args,
d45b2989 3561 .rpc_resp = &res,
1da177e4
LT		 3562 };
3563
3564 /* None of the pathconf attributes are mandatory to implement */
3565 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3566 memset(pathconf, 0, sizeof(*pathconf));
3567 return 0;
3568 }
3569
0e574af1 3570 nfs_fattr_init(pathconf->fattr);
7c513058 3571 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3572}
3573
3574static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3575 struct nfs_pathconf *pathconf)
3576{
3577 struct nfs4_exception exception = { };
3578 int err;
3579
3580 do {
3581 err = nfs4_handle_exception(server,
3582 _nfs4_proc_pathconf(server, fhandle, pathconf),
3583 &exception);
3584 } while (exception.retry);
3585 return err;
3586}
3587
5521abfd 3588int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3589 const struct nfs_open_context *ctx,
3590 const struct nfs_lock_context *l_ctx,
3591 fmode_t fmode)
3592{
3593 const struct nfs_lockowner *lockowner = NULL;
3594
3595 if (l_ctx != NULL)
3596 lockowner = &l_ctx->lockowner;
5521abfd 3597 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3598}
3599EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3600
5521abfd
TM		 3601static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3602 const struct nfs_open_context *ctx,
3603 const struct nfs_lock_context *l_ctx,
3604 fmode_t fmode)
3605{
3606 nfs4_stateid current_stateid;
3607
3608 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3609 return false;
3610 return nfs4_stateid_match(stateid, &current_stateid);
3611}
3612
3613static bool nfs4_error_stateid_expired(int err)
3614{
3615 switch (err) {
3616 case -NFS4ERR_DELEG_REVOKED:
3617 case -NFS4ERR_ADMIN_REVOKED:
3618 case -NFS4ERR_BAD_STATEID:
3619 case -NFS4ERR_STALE_STATEID:
3620 case -NFS4ERR_OLD_STATEID:
3621 case -NFS4ERR_OPENMODE:
3622 case -NFS4ERR_EXPIRED:
3623 return true;
3624 }
3625 return false;
3626}
3627
d20581aa
BH		 3628void __nfs4_read_done_cb(struct nfs_read_data *data)
3629{
cd841605 3630 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3631}
3632
cbdabc7f 3633static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3634{
cd841605 3635 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3636
9e33bed5 3637 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3638 rpc_restart_call_prepare(task);
ec06c096 3639 return -EAGAIN;
1da177e4 3640 }
8850df99 3641
d20581aa 3642 __nfs4_read_done_cb(data);
1da177e4 3643 if (task->tk_status > 0)
ec06c096
TM		 3644 renew_lease(server, data->timestamp);
3645 return 0;
1da177e4
LT		 3646}
3647
5521abfd
TM		 3648static bool nfs4_read_stateid_changed(struct rpc_task *task,
3649 struct nfs_readargs *args)
3650{
3651
3652 if (!nfs4_error_stateid_expired(task->tk_status) ||
3653 nfs4_stateid_is_current(&args->stateid,
3654 args->context,
3655 args->lock_context,
3656 FMODE_READ))
3657 return false;
3658 rpc_restart_call_prepare(task);
3659 return true;
3660}
3661
cbdabc7f
AA		 3662static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3663{
3664
3665 dprintk("--> %s\n", __func__);
3666
3667 if (!nfs4_sequence_done(task, &data->res.seq_res))
3668 return -EAGAIN;
5521abfd
TM		 3669 if (nfs4_read_stateid_changed(task, &data->args))
3670 return -EAGAIN;
d20581aa
BH		 3671 return data->read_done_cb ? data->read_done_cb(task, data) :
3672 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3673}
3674
bdc7f021 3675static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3676{
1da177e4 3677 data->timestamp = jiffies;
cbdabc7f 3678 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3679 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3680 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3681}
3682
ea7c3303
BS		 3683static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3684{
9b206149 3685 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3686 &data->args.seq_args,
3687 &data->res.seq_res,
9b206149
TM		 3688 task))
3689 return;
3690 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3691 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3692}
3693
b029bc9b 3694static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3695{
cd841605 3696 struct inode *inode = data->header->inode;
1da177e4 3697
9e33bed5 3698 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3699 rpc_restart_call_prepare(task);
788e7a89 3700 return -EAGAIN;
1da177e4 3701 }
4f9838c7 3702 if (task->tk_status >= 0) {
1da177e4 3703 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3704 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3705 }
788e7a89 3706 return 0;
1da177e4
LT		 3707}
3708
5521abfd
TM		 3709static bool nfs4_write_stateid_changed(struct rpc_task *task,
3710 struct nfs_writeargs *args)
3711{
3712
3713 if (!nfs4_error_stateid_expired(task->tk_status) ||
3714 nfs4_stateid_is_current(&args->stateid,
3715 args->context,
3716 args->lock_context,
3717 FMODE_WRITE))
3718 return false;
3719 rpc_restart_call_prepare(task);
3720 return true;
3721}
3722
b029bc9b
FI		 3723static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3724{
3725 if (!nfs4_sequence_done(task, &data->res.seq_res))
3726 return -EAGAIN;
5521abfd
TM		 3727 if (nfs4_write_stateid_changed(task, &data->args))
3728 return -EAGAIN;
d20581aa
BH		 3729 return data->write_done_cb ? data->write_done_cb(task, data) :
3730 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3731}
3732
5a37f851
TM		 3733static
3734bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3735{
5a37f851
TM		 3736 const struct nfs_pgio_header *hdr = data->header;
3737
3738 /* Don't request attributes for pNFS or O_DIRECT writes */
3739 if (data->ds_clp != NULL || hdr->dreq != NULL)
3740 return false;
3741 /* Otherwise, request attributes if and only if we don't hold
3742 * a delegation
3743 */
011e2a7f 3744 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3745}
a69aef14 3746
bdc7f021 3747static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3748{
cd841605 3749 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3750
5a37f851 3751 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3752 data->args.bitmask = NULL;
3753 data->res.fattr = NULL;
3754 } else
3755 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3756
b029bc9b
FI		 3757 if (!data->write_done_cb)
3758 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3759 data->res.server = server;
1da177e4
LT		 3760 data->timestamp = jiffies;
3761
bdc7f021 3762 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3763 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3764}
3765
c6cb80d0
BS		 3766static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3767{
9b206149 3768 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3769 &data->args.seq_args,
3770 &data->res.seq_res,
9b206149
TM		 3771 task))
3772 return;
3773 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3774 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 3775}
3776
0b7c0153 3777static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3778{
d9afbd1b
TM		 3779 nfs4_setup_sequence(NFS_SERVER(data->inode),
3780 &data->args.seq_args,
3781 &data->res.seq_res,
3782 task);
1da177e4
LT		 3783}
3784
0b7c0153 3785static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3786{
1da177e4 3787 struct inode *inode = data->inode;
14516c3a 3788
9e33bed5 3789 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3790 rpc_restart_call_prepare(task);
788e7a89 3791 return -EAGAIN;
1da177e4 3792 }
788e7a89 3793 return 0;
1da177e4
LT		 3794}
3795
0b7c0153 3796static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3797{
3798 if (!nfs4_sequence_done(task, &data->res.seq_res))
3799 return -EAGAIN;
0b7c0153 3800 return data->commit_done_cb(task, data);
5f452431
FI		 3801}
3802
0b7c0153 3803static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3804{
788e7a89 3805 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3806
0b7c0153
FI		 3807 if (data->commit_done_cb == NULL)
3808 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3809 data->res.server = server;
bdc7f021 3810 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3811 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3812}
3813
9bc4e3ca
CL		 3814struct nfs4_renewdata {
3815 struct nfs_client *client;
3816 unsigned long timestamp;
3817};
3818
1da177e4
LT		 3819/*
3820 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3821 * standalone procedure for queueing an asynchronous RENEW.
3822 */
9bc4e3ca 3823static void nfs4_renew_release(void *calldata)
dc96aef9 3824{
9bc4e3ca
CL		 3825 struct nfs4_renewdata *data = calldata;
3826 struct nfs_client *clp = data->client;
dc96aef9 3827
0851de06
AB		 3828 if (atomic_read(&clp->cl_count) > 1)
3829 nfs4_schedule_state_renewal(clp);
3830 nfs_put_client(clp);
9bc4e3ca 3831 kfree(data);
dc96aef9
AB		 3832}
3833
9bc4e3ca 3834static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3835{
9bc4e3ca
CL		 3836 struct nfs4_renewdata *data = calldata;
3837 struct nfs_client *clp = data->client;
3838 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3839
3840 if (task->tk_status < 0) {
95baa25c 3841 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3842 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3843 return;
3844 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3845 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3846 return;
3847 }
3848 nfs4_schedule_path_down_recovery(clp);
1da177e4 3849 }
452e9352 3850 do_renew_lease(clp, timestamp);
1da177e4
LT		 3851}
3852
963d8fe5
TM		 3853static const struct rpc_call_ops nfs4_renew_ops = {
3854 .rpc_call_done = nfs4_renew_done,
dc96aef9 3855 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3856};
3857
2f60ea6b 3858static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3859{
3860 struct rpc_message msg = {
3861 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3862 .rpc_argp = clp,
b4454fe1 3863 .rpc_cred = cred,
1da177e4 3864 };
9bc4e3ca 3865 struct nfs4_renewdata *data;
1da177e4 3866
2f60ea6b
TM		 3867 if (renew_flags == 0)
3868 return 0;
0851de06
AB		 3869 if (!atomic_inc_not_zero(&clp->cl_count))
3870 return -EIO;
b569ad34 3871 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3872 if (data == NULL)
3873 return -ENOMEM;
3874 data->client = clp;
3875 data->timestamp = jiffies;
bc7a05ca 3876 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 3877 &nfs4_renew_ops, data);
1da177e4
LT		 3878}
3879
8534d4ec 3880static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3881{
3882 struct rpc_message msg = {
3883 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3884 .rpc_argp = clp,
b4454fe1 3885 .rpc_cred = cred,
1da177e4
LT		 3886 };
3887 unsigned long now = jiffies;
3888 int status;
3889
bc7a05ca 3890 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3891 if (status < 0)
3892 return status;
452e9352 3893 do_renew_lease(clp, now);
1da177e4
LT		 3894 return 0;
3895}
3896
aa1870af
BF		 3897static inline int nfs4_server_supports_acls(struct nfs_server *server)
3898{
3899 return (server->caps & NFS_CAP_ACLS)
3900 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3901 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3902}
3903
21f498c2
TM		 3904/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3905 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3906 * the stack.
3907 */
21f498c2 3908#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3909
e9e3d724
NH		 3910static int buf_to_pages_noslab(const void *buf, size_t buflen,
3911 struct page **pages, unsigned int *pgbase)
3912{
3913 struct page *newpage, **spages;
3914 int rc = 0;
3915 size_t len;
3916 spages = pages;
3917
3918 do {
21f498c2 3919 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3920 newpage = alloc_page(GFP_KERNEL);
3921
3922 if (newpage == NULL)
3923 goto unwind;
3924 memcpy(page_address(newpage), buf, len);
3925 buf += len;
3926 buflen -= len;
3927 *pages++ = newpage;
3928 rc++;
3929 } while (buflen != 0);
3930
3931 return rc;
3932
3933unwind:
3934 for(; rc > 0; rc--)
3935 __free_page(spages[rc-1]);
3936 return -ENOMEM;
3937}
3938
e50a1c2e
BF		 3939struct nfs4_cached_acl {
3940 int cached;
3941 size_t len;
3e9d4154 3942 char data[0];
e50a1c2e
BF		 3943};
3944
3945static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3946{
3947 struct nfs_inode *nfsi = NFS_I(inode);
3948
3949 spin_lock(&inode->i_lock);
3950 kfree(nfsi->nfs4_acl);
3951 nfsi->nfs4_acl = acl;
3952 spin_unlock(&inode->i_lock);
3953}
3954
3955static void nfs4_zap_acl_attr(struct inode *inode)
3956{
3957 nfs4_set_cached_acl(inode, NULL);
3958}
3959
3960static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3961{
3962 struct nfs_inode *nfsi = NFS_I(inode);
3963 struct nfs4_cached_acl *acl;
3964 int ret = -ENOENT;
3965
3966 spin_lock(&inode->i_lock);
3967 acl = nfsi->nfs4_acl;
3968 if (acl == NULL)
3969 goto out;
3970 if (buf == NULL) /* user is just asking for length */
3971 goto out_len;
3972 if (acl->cached == 0)
3973 goto out;
3974 ret = -ERANGE; /* see getxattr(2) man page */
3975 if (acl->len > buflen)
3976 goto out;
3977 memcpy(buf, acl->data, acl->len);
3978out_len:
3979 ret = acl->len;
3980out:
3981 spin_unlock(&inode->i_lock);
3982 return ret;
3983}
3984
5794d21e 3985static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3986{
3987 struct nfs4_cached_acl *acl;
b291f1b1 3988 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3989
1f1ea6c2 3990 if (buflen <= PAGE_SIZE) {
b291f1b1 3991 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3992 if (acl == NULL)
3993 goto out;
3994 acl->cached = 1;
5794d21e 3995 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3996 } else {
3997 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3998 if (acl == NULL)
3999 goto out;
4000 acl->cached = 0;
4001 }
4002 acl->len = acl_len;
4003out:
4004 nfs4_set_cached_acl(inode, acl);
4005}
4006
bf118a34
AA		 4007/*
4008 * The getxattr API returns the required buffer length when called with a
4009 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4010 * the required buf. On a NULL buf, we send a page of data to the server
4011 * guessing that the ACL request can be serviced by a page. If so, we cache
4012 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4013 * the cache. If not so, we throw away the page, and cache the required
4014 * length. The next getxattr call will then produce another round trip to
4015 * the server, this time with the input buf of the required size.
4016 */
16b4289c 4017static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4018{
bf118a34 4019 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4020 struct nfs_getaclargs args = {
4021 .fh = NFS_FH(inode),
4022 .acl_pages = pages,
4023 .acl_len = buflen,
4024 };
663c79b3
BH		 4025 struct nfs_getaclres res = {
4026 .acl_len = buflen,
4027 };
aa1870af
BF		 4028 struct rpc_message msg = {
4029 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4030 .rpc_argp = &args,
663c79b3 4031 .rpc_resp = &res,
aa1870af 4032 };
21f498c2
TM		 4033 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4034 int ret = -ENOMEM, i;
aa1870af 4035
bf118a34
AA		 4036 /* As long as we're doing a round trip to the server anyway,
4037 * let's be prepared for a page of acl data. */
4038 if (npages == 0)
4039 npages = 1;
21f498c2
TM		 4040 if (npages > ARRAY_SIZE(pages))
4041 return -ERANGE;
5a006899 4042
bf118a34
AA		 4043 for (i = 0; i < npages; i++) {
4044 pages[i] = alloc_page(GFP_KERNEL);
4045 if (!pages[i])
4046 goto out_free;
e50a1c2e 4047 }
5a006899
SP		 4048
4049 /* for decoding across pages */
4050 res.acl_scratch = alloc_page(GFP_KERNEL);
4051 if (!res.acl_scratch)
4052 goto out_free;
4053
bf118a34
AA		 4054 args.acl_len = npages * PAGE_SIZE;
4055 args.acl_pgbase = 0;
5a006899 4056
de040bec 4057 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4058 __func__, buf, buflen, npages, args.acl_len);
4059 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4060 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4061 if (ret)
4062 goto out_free;
bf118a34 4063
1f1ea6c2
TM		 4064 /* Handle the case where the passed-in buffer is too short */
4065 if (res.acl_flags & NFS4_ACL_TRUNC) {
4066 /* Did the user only issue a request for the acl length? */
4067 if (buf == NULL)
4068 goto out_ok;
e50a1c2e 4069 ret = -ERANGE;
1f1ea6c2 4070 goto out_free;
e50a1c2e 4071 }
1f1ea6c2 4072 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4073 if (buf) {
4074 if (res.acl_len > buflen) {
4075 ret = -ERANGE;
4076 goto out_free;
4077 }
1f1ea6c2 4078 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4079 }
1f1ea6c2
TM		 4080out_ok:
4081 ret = res.acl_len;
e50a1c2e 4082out_free:
bf118a34
AA		 4083 for (i = 0; i < npages; i++)
4084 if (pages[i])
4085 __free_page(pages[i]);
331818f1
TM		 4086 if (res.acl_scratch)
4087 __free_page(res.acl_scratch);
aa1870af
BF		 4088 return ret;
4089}
4090
16b4289c
TM		 4091static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4092{
4093 struct nfs4_exception exception = { };
4094 ssize_t ret;
4095 do {
4096 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4097 if (ret >= 0)
4098 break;
4099 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4100 } while (exception.retry);
4101 return ret;
4102}
4103
e50a1c2e
BF		 4104static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4105{
4106 struct nfs_server *server = NFS_SERVER(inode);
4107 int ret;
4108
4109 if (!nfs4_server_supports_acls(server))
4110 return -EOPNOTSUPP;
4111 ret = nfs_revalidate_inode(server, inode);
4112 if (ret < 0)
4113 return ret;
08a22b39
AK		 4114 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4115 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4116 ret = nfs4_read_cached_acl(inode, buf, buflen);
4117 if (ret != -ENOENT)
bf118a34
AA		 4118 /* -ENOENT is returned if there is no ACL or if there is an ACL
4119 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4120 return ret;
4121 return nfs4_get_acl_uncached(inode, buf, buflen);
4122}
4123
16b4289c 4124static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4125{
4126 struct nfs_server *server = NFS_SERVER(inode);
4127 struct page *pages[NFS4ACL_MAXPAGES];
4128 struct nfs_setaclargs arg = {
4129 .fh = NFS_FH(inode),
4130 .acl_pages = pages,
4131 .acl_len = buflen,
4132 };
73c403a9 4133 struct nfs_setaclres res;
4b580ee3
BF		 4134 struct rpc_message msg = {
4135 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4136 .rpc_argp = &arg,
73c403a9 4137 .rpc_resp = &res,
4b580ee3 4138 };
21f498c2 4139 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4140 int ret, i;
4b580ee3
BF		 4141
4142 if (!nfs4_server_supports_acls(server))
4143 return -EOPNOTSUPP;
21f498c2
TM		 4144 if (npages > ARRAY_SIZE(pages))
4145 return -ERANGE;
e9e3d724
NH		 4146 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4147 if (i < 0)
4148 return i;
57ec14c5 4149 nfs4_inode_return_delegation(inode);
7c513058 4150 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4151
4152 /*
4153 * Free each page after tx, so the only ref left is
4154 * held by the network stack
4155 */
4156 for (; i > 0; i--)
4157 put_page(pages[i-1]);
4158
08a22b39
AK		 4159 /*
4160 * Acl update can result in inode attribute update.
4161 * so mark the attribute cache invalid.
4162 */
4163 spin_lock(&inode->i_lock);
4164 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4165 spin_unlock(&inode->i_lock);
f41f7418
TM		 4166 nfs_access_zap_cache(inode);
4167 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4168 return ret;
4169}
4170
16b4289c
TM		 4171static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4172{
4173 struct nfs4_exception exception = { };
4174 int err;
4175 do {
4176 err = nfs4_handle_exception(NFS_SERVER(inode),
4177 __nfs4_proc_set_acl(inode, buf, buflen),
4178 &exception);
4179 } while (exception.retry);
4180 return err;
4181}
4182
1da177e4 4183static int
aa5190d0 4184nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4185{
aa5190d0
TM		 4186 struct nfs_client *clp = server->nfs_client;
4187
4188 if (task->tk_status >= 0)
1da177e4
LT		 4189 return 0;
4190 switch(task->tk_status) {
a1d0b5ee 4191 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4192 case -NFS4ERR_ADMIN_REVOKED:
4193 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4194 if (state == NULL)
4195 break;
4196 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4197 case -NFS4ERR_OPENMODE:
4198 if (state == NULL)
4199 break;
5d422301
TM		 4200 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4201 goto stateid_invalid;
0400a6b0 4202 goto wait_on_recovery;
0ced63d1 4203 case -NFS4ERR_EXPIRED:
5d422301
TM		 4204 if (state != NULL) {
4205 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4206 goto stateid_invalid;
4207 }
1da177e4 4208 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4209 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4210 nfs4_schedule_lease_recovery(clp);
4211 goto wait_on_recovery;
4745e315
AA		 4212#if defined(CONFIG_NFS_V4_1)
4213 case -NFS4ERR_BADSESSION:
4214 case -NFS4ERR_BADSLOT:
4215 case -NFS4ERR_BAD_HIGH_SLOT:
4216 case -NFS4ERR_DEADSESSION:
4217 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4218 case -NFS4ERR_SEQ_FALSE_RETRY:
4219 case -NFS4ERR_SEQ_MISORDERED:
4220 dprintk("%s ERROR %d, Reset session\n", __func__,
4221 task->tk_status);
9f594791 4222 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4223 task->tk_status = 0;
4224 return -EAGAIN;
4225#endif /* CONFIG_NFS_V4_1 */
1da177e4 4226 case -NFS4ERR_DELAY:
aa5190d0 4227 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4228 case -NFS4ERR_GRACE:
1da177e4
LT		 4229 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4230 task->tk_status = 0;
4231 return -EAGAIN;
a8a4ae3a 4232 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4233 case -NFS4ERR_OLD_STATEID:
4234 task->tk_status = 0;
4235 return -EAGAIN;
4236 }
4237 task->tk_status = nfs4_map_errors(task->tk_status);
4238 return 0;
5d422301
TM		 4239stateid_invalid:
4240 task->tk_status = -EIO;
4241 return 0;
0400a6b0 4242wait_on_recovery:
a2c0b9e2 4243 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4244 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4245 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4246 task->tk_status = 0;
4247 return -EAGAIN;
1da177e4
LT		 4248}
4249
f092075d
CL		 4250static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4251 nfs4_verifier *bootverf)
cd93710e
CL		 4252{
4253 __be32 verf[2];
4254
2c820d9a
CL		 4255 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4256 /* An impossible timestamp guarantees this value
4257 * will never match a generated boot time. */
4258 verf[0] = 0;
4259 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4260 } else {
f092075d
CL		 4261 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4262 verf[0] = (__be32)nn->boot_time.tv_sec;
4263 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4264 }
cd93710e
CL		 4265 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4266}
4267
e984a55a
CL		 4268static unsigned int
4269nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4270 char *buf, size_t len)
4271{
4272 unsigned int result;
4273
4274 rcu_read_lock();
4275 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4276 clp->cl_ipaddr,
4277 rpc_peeraddr2str(clp->cl_rpcclient,
4278 RPC_DISPLAY_ADDR),
4279 rpc_peeraddr2str(clp->cl_rpcclient,
4280 RPC_DISPLAY_PROTO));
4281 rcu_read_unlock();
4282 return result;
4283}
4284
4285static unsigned int
4286nfs4_init_uniform_client_string(const struct nfs_client *clp,
4287 char *buf, size_t len)
4288{
6f2ea7f2
CL		 4289 char *nodename = clp->cl_rpcclient->cl_nodename;
4290
4291 if (nfs4_client_id_uniquifier[0] != '\0')
4292 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4293 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4294 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4295 nodename);
e984a55a
CL		 4296}
4297
6bbb4ae8
CL		 4298/**
4299 * nfs4_proc_setclientid - Negotiate client ID
4300 * @clp: state data structure
4301 * @program: RPC program for NFSv4 callback service
4302 * @port: IP port number for NFS4 callback service
4303 * @cred: RPC credential to use for this call
4304 * @res: where to place the result
4305 *
4306 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4307 */
bb8b27e5
TM		 4308int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4309 unsigned short port, struct rpc_cred *cred,
4310 struct nfs4_setclientid_res *res)
1da177e4
LT		 4311{
4312 nfs4_verifier sc_verifier;
4313 struct nfs4_setclientid setclientid = {
4314 .sc_verifier = &sc_verifier,
4315 .sc_prog = program,
f4eecd5d 4316 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4317 };
4318 struct rpc_message msg = {
4319 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4320 .rpc_argp = &setclientid,
bb8b27e5 4321 .rpc_resp = res,
286d7d6a 4322 .rpc_cred = cred,
1da177e4 4323 };
6bbb4ae8 4324 int status;
1da177e4 4325
de734831 4326 /* nfs_client_id4 */
f092075d 4327 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4328 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4329 setclientid.sc_name_len =
4330 nfs4_init_uniform_client_string(clp,
4331 setclientid.sc_name,
4332 sizeof(setclientid.sc_name));
4333 else
4334 setclientid.sc_name_len =
4335 nfs4_init_nonuniform_client_string(clp,
4336 setclientid.sc_name,
4337 sizeof(setclientid.sc_name));
de734831 4338 /* cb_client4 */
e984a55a 4339 rcu_read_lock();
de734831 4340 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4341 sizeof(setclientid.sc_netid),
4342 rpc_peeraddr2str(clp->cl_rpcclient,
4343 RPC_DISPLAY_NETID));
de734831
CL		 4344 rcu_read_unlock();
4345 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4346 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4347 clp->cl_ipaddr, port >> 8, port & 255);
4348
6bbb4ae8
CL		 4349 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4350 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4351 setclientid.sc_name_len, setclientid.sc_name);
4352 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4353 dprintk("NFS reply setclientid: %d\n", status);
4354 return status;
1da177e4
LT		 4355}
4356
6bbb4ae8
CL		 4357/**
4358 * nfs4_proc_setclientid_confirm - Confirm client ID
4359 * @clp: state data structure
4360 * @res: result of a previous SETCLIENTID
4361 * @cred: RPC credential to use for this call
4362 *
4363 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4364 */
fd954ae1 4365int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4366 struct nfs4_setclientid_res *arg,
4367 struct rpc_cred *cred)
1da177e4 4368{
1da177e4
LT		 4369 struct rpc_message msg = {
4370 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4371 .rpc_argp = arg,
286d7d6a 4372 .rpc_cred = cred,
1da177e4 4373 };
1da177e4
LT		 4374 int status;
4375
6bbb4ae8
CL		 4376 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4377 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4378 clp->cl_clientid);
1bd714f2 4379 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
6bbb4ae8 4380 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4381 return status;
4382}
4383
fe650407
TM		 4384struct nfs4_delegreturndata {
4385 struct nfs4_delegreturnargs args;
fa178f29 4386 struct nfs4_delegreturnres res;
fe650407
TM		 4387 struct nfs_fh fh;
4388 nfs4_stateid stateid;
26e976a8 4389 unsigned long timestamp;
fa178f29 4390 struct nfs_fattr fattr;
fe650407
TM		 4391 int rpc_status;
4392};
4393
fe650407
TM		 4394static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4395{
4396 struct nfs4_delegreturndata *data = calldata;
938e1010 4397
14516c3a
TM		 4398 if (!nfs4_sequence_done(task, &data->res.seq_res))
4399 return;
938e1010 4400
79708861
RL		 4401 switch (task->tk_status) {
4402 case -NFS4ERR_STALE_STATEID:
4403 case -NFS4ERR_EXPIRED:
4404 case 0:
fa178f29 4405 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4406 break;
4407 default:
4408 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4409 -EAGAIN) {
d00c5d43 4410 rpc_restart_call_prepare(task);
79708861
RL		 4411 return;
4412 }
4413 }
4414 data->rpc_status = task->tk_status;
fe650407
TM		 4415}
4416
4417static void nfs4_delegreturn_release(void *calldata)
4418{
fe650407
TM		 4419 kfree(calldata);
4420}
4421
938e1010
AA		 4422#if defined(CONFIG_NFS_V4_1)
4423static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4424{
4425 struct nfs4_delegreturndata *d_data;
4426
4427 d_data = (struct nfs4_delegreturndata *)data;
4428
d9afbd1b
TM		 4429 nfs4_setup_sequence(d_data->res.server,
4430 &d_data->args.seq_args,
4431 &d_data->res.seq_res,
4432 task);
938e1010
AA		 4433}
4434#endif /* CONFIG_NFS_V4_1 */
4435
c8d149f3 4436static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4437#if defined(CONFIG_NFS_V4_1)
4438 .rpc_call_prepare = nfs4_delegreturn_prepare,
4439#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4440 .rpc_call_done = nfs4_delegreturn_done,
4441 .rpc_release = nfs4_delegreturn_release,
4442};
4443
e6f81075 4444static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4445{
4446 struct nfs4_delegreturndata *data;
fa178f29 4447 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4448 struct rpc_task *task;
5138fde0
TM		 4449 struct rpc_message msg = {
4450 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4451 .rpc_cred = cred,
4452 };
c970aa85
TM		 4453 struct rpc_task_setup task_setup_data = {
4454 .rpc_client = server->client,
5138fde0 4455 .rpc_message = &msg,
c970aa85
TM		 4456 .callback_ops = &nfs4_delegreturn_ops,
4457 .flags = RPC_TASK_ASYNC,
4458 };
e6f81075 4459 int status = 0;
fe650407 4460
8535b2be 4461 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4462 if (data == NULL)
4463 return -ENOMEM;
9d12b216 4464 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4465 data->args.fhandle = &data->fh;
4466 data->args.stateid = &data->stateid;
9e907fec 4467 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4468 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4469 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4470 data->res.fattr = &data->fattr;
4471 data->res.server = server;
5138fde0 4472 nfs_fattr_init(data->res.fattr);
26e976a8 4473 data->timestamp = jiffies;
fe650407
TM		 4474 data->rpc_status = 0;
4475
c970aa85 4476 task_setup_data.callback_data = data;
1174dd1f
TM		 4477 msg.rpc_argp = &data->args;
4478 msg.rpc_resp = &data->res;
c970aa85 4479 task = rpc_run_task(&task_setup_data);
7a1218a2 4480 if (IS_ERR(task))
fe650407 4481 return PTR_ERR(task);
e6f81075
TM		 4482 if (!issync)
4483 goto out;
fe650407 4484 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4485 if (status != 0)
4486 goto out;
4487 status = data->rpc_status;
e144cbcc
TM		 4488 if (status == 0)
4489 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4490 else
4491 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4492out:
e6b3c4db 4493 rpc_put_task(task);
fe650407 4494 return status;
1da177e4
LT		 4495}
4496
e6f81075 4497int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4498{
4499 struct nfs_server *server = NFS_SERVER(inode);
4500 struct nfs4_exception exception = { };
4501 int err;
4502 do {
e6f81075 4503 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4504 switch (err) {
4505 case -NFS4ERR_STALE_STATEID:
4506 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4507 case 0:
4508 return 0;
4509 }
4510 err = nfs4_handle_exception(server, err, &exception);
4511 } while (exception.retry);
4512 return err;
4513}
4514
4515#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4516#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4517
4518/*
4519 * sleep, with exponential backoff, and retry the LOCK operation.
4520 */
4521static unsigned long
4522nfs4_set_lock_task_retry(unsigned long timeout)
4523{
d310310c 4524 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4525 timeout <<= 1;
4526 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4527 return NFS4_LOCK_MAXTIMEOUT;
4528 return timeout;
4529}
4530
1da177e4
LT		 4531static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4532{
4533 struct inode *inode = state->inode;
4534 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4535 struct nfs_client *clp = server->nfs_client;
911d1aaf 4536 struct nfs_lockt_args arg = {
1da177e4 4537 .fh = NFS_FH(inode),
911d1aaf 4538 .fl = request,
1da177e4 4539 };
911d1aaf
TM		 4540 struct nfs_lockt_res res = {
4541 .denied = request,
1da177e4
LT		 4542 };
4543 struct rpc_message msg = {
4544 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4545 .rpc_argp = &arg,
4546 .rpc_resp = &res,
4547 .rpc_cred = state->owner->so_cred,
4548 };
1da177e4
LT		 4549 struct nfs4_lock_state *lsp;
4550 int status;
4551
911d1aaf 4552 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4553 status = nfs4_set_lock_state(state, request);
4554 if (status != 0)
4555 goto out;
4556 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4557 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4558 arg.lock_owner.s_dev = server->s_dev;
7c513058 4559 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4560 switch (status) {
4561 case 0:
4562 request->fl_type = F_UNLCK;
4563 break;
4564 case -NFS4ERR_DENIED:
4565 status = 0;
1da177e4 4566 }
70cc6487 4567 request->fl_ops->fl_release_private(request);
8d0a8a9d 4568out:
1da177e4
LT		 4569 return status;
4570}
4571
4572static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4573{
4574 struct nfs4_exception exception = { };
4575 int err;
4576
4577 do {
4578 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4579 _nfs4_proc_getlk(state, cmd, request),
4580 &exception);
4581 } while (exception.retry);
4582 return err;
4583}
4584
4585static int do_vfs_lock(struct file *file, struct file_lock *fl)
4586{
4587 int res = 0;
4588 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4589 case FL_POSIX:
4590 res = posix_lock_file_wait(file, fl);
4591 break;
4592 case FL_FLOCK:
4593 res = flock_lock_file_wait(file, fl);
4594 break;
4595 default:
4596 BUG();
4597 }
1da177e4
LT		 4598 return res;
4599}
4600
faf5f49c 4601struct nfs4_unlockdata {
911d1aaf
TM		 4602 struct nfs_locku_args arg;
4603 struct nfs_locku_res res;
faf5f49c
TM		 4604 struct nfs4_lock_state *lsp;
4605 struct nfs_open_context *ctx;
911d1aaf
TM		 4606 struct file_lock fl;
4607 const struct nfs_server *server;
26e976a8 4608 unsigned long timestamp;
faf5f49c
TM		 4609};
4610
911d1aaf
TM		 4611static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4612 struct nfs_open_context *ctx,
4613 struct nfs4_lock_state *lsp,
4614 struct nfs_seqid *seqid)
4615{
4616 struct nfs4_unlockdata *p;
4617 struct inode *inode = lsp->ls_state->inode;
4618
8535b2be 4619 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4620 if (p == NULL)
4621 return NULL;
4622 p->arg.fh = NFS_FH(inode);
4623 p->arg.fl = &p->fl;
4624 p->arg.seqid = seqid;
c1d51931 4625 p->res.seqid = seqid;
911d1aaf
TM		 4626 p->arg.stateid = &lsp->ls_stateid;
4627 p->lsp = lsp;
4628 atomic_inc(&lsp->ls_count);
4629 /* Ensure we don't close file until we're done freeing locks! */
4630 p->ctx = get_nfs_open_context(ctx);
4631 memcpy(&p->fl, fl, sizeof(p->fl));
4632 p->server = NFS_SERVER(inode);
4633 return p;
4634}
4635
06f814a3 4636static void nfs4_locku_release_calldata(void *data)
faf5f49c 4637{
963d8fe5 4638 struct nfs4_unlockdata *calldata = data;
911d1aaf 4639 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4640 nfs4_put_lock_state(calldata->lsp);
4641 put_nfs_open_context(calldata->ctx);
4642 kfree(calldata);
faf5f49c
TM		 4643}
4644
963d8fe5 4645static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4646{
963d8fe5 4647 struct nfs4_unlockdata *calldata = data;
faf5f49c 4648
14516c3a
TM		 4649 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4650 return;
faf5f49c
TM		 4651 switch (task->tk_status) {
4652 case 0:
f597c537
TM		 4653 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4654 &calldata->res.stateid);
26e976a8 4655 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4656 break;
9e33bed5
TM		 4657 case -NFS4ERR_BAD_STATEID:
4658 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4659 case -NFS4ERR_STALE_STATEID:
4660 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4661 break;
4662 default:
9e33bed5 4663 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4664 rpc_restart_call_prepare(task);
faf5f49c 4665 }
2b1bc308 4666 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4667}
4668
4ce70ada 4669static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4670{
4ce70ada 4671 struct nfs4_unlockdata *calldata = data;
faf5f49c 4672
911d1aaf 4673 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 4674 goto out_wait;
795a88c9 4675 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 4676 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 4677 goto out_no_action;
faf5f49c 4678 }
26e976a8 4679 calldata->timestamp = jiffies;
035168ab 4680 if (nfs4_setup_sequence(calldata->server,
a893693c 4681 &calldata->arg.seq_args,
2240a9e2
TM		 4682 &calldata->res.seq_res,
4683 task) != 0)
4684 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 4685 return;
4686out_no_action:
4687 task->tk_action = NULL;
4688out_wait:
4689 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4690}
4691
963d8fe5 4692static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4693 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4694 .rpc_call_done = nfs4_locku_done,
06f814a3 4695 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4696};
4697
a5d16a4d
TM		 4698static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4699 struct nfs_open_context *ctx,
4700 struct nfs4_lock_state *lsp,
4701 struct nfs_seqid *seqid)
4702{
4703 struct nfs4_unlockdata *data;
5138fde0
TM		 4704 struct rpc_message msg = {
4705 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4706 .rpc_cred = ctx->cred,
4707 };
c970aa85
TM		 4708 struct rpc_task_setup task_setup_data = {
4709 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4710 .rpc_message = &msg,
c970aa85 4711 .callback_ops = &nfs4_locku_ops,
101070ca 4712 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4713 .flags = RPC_TASK_ASYNC,
4714 };
a5d16a4d 4715
137d6aca
FF		 4716 /* Ensure this is an unlock - when canceling a lock, the
4717 * canceled lock is passed in, and it won't be an unlock.
4718 */
4719 fl->fl_type = F_UNLCK;
4720
a5d16a4d
TM		 4721 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4722 if (data == NULL) {
4723 nfs_free_seqid(seqid);
4724 return ERR_PTR(-ENOMEM);
4725 }
4726
9d12b216 4727 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4728 msg.rpc_argp = &data->arg;
4729 msg.rpc_resp = &data->res;
c970aa85
TM		 4730 task_setup_data.callback_data = data;
4731 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4732}
4733
faf5f49c
TM		 4734static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4735{
65b62a29
TM		 4736 struct inode *inode = state->inode;
4737 struct nfs4_state_owner *sp = state->owner;
4738 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 4739 struct nfs_seqid *seqid;
1da177e4 4740 struct nfs4_lock_state *lsp;
06f814a3
TM		 4741 struct rpc_task *task;
4742 int status = 0;
536ff0f8 4743 unsigned char fl_flags = request->fl_flags;
faf5f49c 4744
8d0a8a9d 4745 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4746 /* Unlock _before_ we do the RPC call */
4747 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 4748 /* Exclude nfs_delegation_claim_locks() */
4749 mutex_lock(&sp->so_delegreturn_mutex);
4750 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 4751 down_read(&nfsi->rwsem);
4752 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4753 up_read(&nfsi->rwsem);
65b62a29 4754 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 4755 goto out;
19e03c57
TM		 4756 }
4757 up_read(&nfsi->rwsem);
65b62a29 4758 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 4759 if (status != 0)
9b073574
TM		 4760 goto out;
4761 /* Is this a delegated lock? */
4762 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4763 goto out;
8d0a8a9d 4764 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4765 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4766 status = -ENOMEM;
911d1aaf 4767 if (seqid == NULL)
9b073574 4768 goto out;
cd3758e3 4769 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4770 status = PTR_ERR(task);
4771 if (IS_ERR(task))
9b073574 4772 goto out;
a5d16a4d 4773 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4774 rpc_put_task(task);
9b073574 4775out:
536ff0f8 4776 request->fl_flags = fl_flags;
1da177e4
LT		 4777 return status;
4778}
4779
a5d16a4d
TM		 4780struct nfs4_lockdata {
4781 struct nfs_lock_args arg;
4782 struct nfs_lock_res res;
4783 struct nfs4_lock_state *lsp;
4784 struct nfs_open_context *ctx;
4785 struct file_lock fl;
26e976a8 4786 unsigned long timestamp;
a5d16a4d
TM		 4787 int rpc_status;
4788 int cancelled;
66179efe 4789 struct nfs_server *server;
a5d16a4d
TM		 4790};
4791
4792static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4793 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4794 gfp_t gfp_mask)
1da177e4 4795{
a5d16a4d
TM		 4796 struct nfs4_lockdata *p;
4797 struct inode *inode = lsp->ls_state->inode;
1da177e4 4798 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4799
8535b2be 4800 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4801 if (p == NULL)
4802 return NULL;
4803
4804 p->arg.fh = NFS_FH(inode);
4805 p->arg.fl = &p->fl;
8535b2be 4806 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4807 if (p->arg.open_seqid == NULL)
4808 goto out_free;
8535b2be 4809 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4810 if (p->arg.lock_seqid == NULL)
2f74c0a0 4811 goto out_free_seqid;
a5d16a4d 4812 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4813 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4814 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4815 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4816 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4817 p->lsp = lsp;
66179efe 4818 p->server = server;
a5d16a4d
TM		 4819 atomic_inc(&lsp->ls_count);
4820 p->ctx = get_nfs_open_context(ctx);
4821 memcpy(&p->fl, fl, sizeof(p->fl));
4822 return p;
2f74c0a0
TM		 4823out_free_seqid:
4824 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4825out_free:
4826 kfree(p);
4827 return NULL;
4828}
4829
4830static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4831{
4832 struct nfs4_lockdata *data = calldata;
4833 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4834
3110ff80 4835 dprintk("%s: begin!\n", __func__);
2f74c0a0 4836 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 4837 goto out_wait;
a5d16a4d
TM		 4838 /* Do we need to do an open_to_lock_owner? */
4839 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4840 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4841 goto out_release_lock_seqid;
8fe72bac 4842 }
8e472f33 4843 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 4844 data->arg.new_lock_owner = 1;
c1d51931 4845 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4846 } else
4847 data->arg.new_lock_owner = 0;
5d422301
TM		 4848 if (!nfs4_valid_open_stateid(state)) {
4849 data->rpc_status = -EBADF;
4850 task->tk_action = NULL;
4851 goto out_release_open_seqid;
4852 }
26e976a8 4853 data->timestamp = jiffies;
035168ab
TM		 4854 if (nfs4_setup_sequence(data->server,
4855 &data->arg.seq_args,
2240a9e2 4856 &data->res.seq_res,
d9afbd1b 4857 task) == 0)
66179efe 4858 return;
5d422301 4859out_release_open_seqid:
2240a9e2
TM		 4860 nfs_release_seqid(data->arg.open_seqid);
4861out_release_lock_seqid:
4862 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 4863out_wait:
4864 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 4865 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4866}
4867
a5d16a4d
TM		 4868static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4869{
4870 struct nfs4_lockdata *data = calldata;
4871
3110ff80 4872 dprintk("%s: begin!\n", __func__);
a5d16a4d 4873
14516c3a
TM		 4874 if (!nfs4_sequence_done(task, &data->res.seq_res))
4875 return;
66179efe 4876
a5d16a4d 4877 data->rpc_status = task->tk_status;
a5d16a4d 4878 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4879 if (data->rpc_status == 0)
4880 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4881 else
4882 goto out;
4883 }
4884 if (data->rpc_status == 0) {
f597c537 4885 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4886 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4887 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4888 }
a5d16a4d 4889out:
3110ff80 4890 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4891}
4892
4893static void nfs4_lock_release(void *calldata)
4894{
4895 struct nfs4_lockdata *data = calldata;
4896
3110ff80 4897 dprintk("%s: begin!\n", __func__);
2f74c0a0 4898 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4899 if (data->cancelled != 0) {
4900 struct rpc_task *task;
4901 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4902 data->arg.lock_seqid);
4903 if (!IS_ERR(task))
bf294b41 4904 rpc_put_task_async(task);
3110ff80 4905 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4906 } else
4907 nfs_free_seqid(data->arg.lock_seqid);
4908 nfs4_put_lock_state(data->lsp);
4909 put_nfs_open_context(data->ctx);
4910 kfree(data);
3110ff80 4911 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4912}
4913
4914static const struct rpc_call_ops nfs4_lock_ops = {
4915 .rpc_call_prepare = nfs4_lock_prepare,
4916 .rpc_call_done = nfs4_lock_done,
4917 .rpc_release = nfs4_lock_release,
4918};
4919
2bee72a6
TM		 4920static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4921{
2bee72a6
TM		 4922 switch (error) {
4923 case -NFS4ERR_ADMIN_REVOKED:
4924 case -NFS4ERR_BAD_STATEID:
ecac799a 4925 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4926 if (new_lock_owner != 0 ||
795a88c9 4927 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4928 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4929 break;
4930 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4931 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4932 case -NFS4ERR_EXPIRED:
4933 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4934 };
4935}
4936
afe6c27c 4937static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4938{
4939 struct nfs4_lockdata *data;
4940 struct rpc_task *task;
5138fde0
TM		 4941 struct rpc_message msg = {
4942 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4943 .rpc_cred = state->owner->so_cred,
4944 };
c970aa85
TM		 4945 struct rpc_task_setup task_setup_data = {
4946 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4947 .rpc_message = &msg,
c970aa85 4948 .callback_ops = &nfs4_lock_ops,
101070ca 4949 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4950 .flags = RPC_TASK_ASYNC,
4951 };
a5d16a4d
TM		 4952 int ret;
4953
3110ff80 4954 dprintk("%s: begin!\n", __func__);
cd3758e3 4955 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4956 fl->fl_u.nfs4_fl.owner,
4957 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4958 if (data == NULL)
4959 return -ENOMEM;
4960 if (IS_SETLKW(cmd))
4961 data->arg.block = 1;
9d12b216 4962 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4963 msg.rpc_argp = &data->arg;
4964 msg.rpc_resp = &data->res;
c970aa85 4965 task_setup_data.callback_data = data;
8fe72bac
TM		 4966 if (recovery_type > NFS_LOCK_NEW) {
4967 if (recovery_type == NFS_LOCK_RECLAIM)
4968 data->arg.reclaim = NFS_LOCK_RECLAIM;
4969 nfs4_set_sequence_privileged(&data->arg.seq_args);
4970 }
c970aa85 4971 task = rpc_run_task(&task_setup_data);
7a1218a2 4972 if (IS_ERR(task))
a5d16a4d 4973 return PTR_ERR(task);
a5d16a4d
TM		 4974 ret = nfs4_wait_for_completion_rpc_task(task);
4975 if (ret == 0) {
4976 ret = data->rpc_status;
2bee72a6
TM		 4977 if (ret)
4978 nfs4_handle_setlk_error(data->server, data->lsp,
4979 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4980 } else
4981 data->cancelled = 1;
e6b3c4db 4982 rpc_put_task(task);
3110ff80 4983 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4984 return ret;
1da177e4
LT		 4985}
4986
4987static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4988{
202b50dc 4989 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4990 struct nfs4_exception exception = {
4991 .inode = state->inode,
4992 };
202b50dc
TM		 4993 int err;
4994
4995 do {
42a2d13e
TM		 4996 /* Cache the lock if possible... */
4997 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4998 return 0;
afe6c27c 4999 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 5000 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5001 break;
5002 nfs4_handle_exception(server, err, &exception);
5003 } while (exception.retry);
5004 return err;
1da177e4
LT		 5005}
5006
5007static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5008{
202b50dc 5009 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5010 struct nfs4_exception exception = {
5011 .inode = state->inode,
5012 };
202b50dc
TM		 5013 int err;
5014
6bfc93ef
TM		 5015 err = nfs4_set_lock_state(state, request);
5016 if (err != 0)
5017 return err;
202b50dc 5018 do {
42a2d13e
TM		 5019 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5020 return 0;
afe6c27c 5021 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 5022 switch (err) {
5023 default:
5024 goto out;
5025 case -NFS4ERR_GRACE:
5026 case -NFS4ERR_DELAY:
5027 nfs4_handle_exception(server, err, &exception);
5028 err = 0;
5029 }
202b50dc 5030 } while (exception.retry);
a9ed2e25 5031out:
202b50dc 5032 return err;
1da177e4
LT		 5033}
5034
f062eb6c 5035#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5036/**
5037 * nfs41_check_expired_locks - possibly free a lock stateid
5038 *
5039 * @state: NFSv4 state for an inode
5040 *
5041 * Returns NFS_OK if recovery for this stateid is now finished.
5042 * Otherwise a negative NFS4ERR value is returned.
5043 */
b01dd1d8 5044static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5045{
eb64cf96 5046 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5047 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5048 struct nfs_server *server = NFS_SERVER(state->inode);
5049
b01dd1d8 5050 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5051 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 5052 status = nfs41_test_stateid(server, &lsp->ls_stateid);
5053 if (status != NFS_OK) {
3e60ffdd
CL		 5054 /* Free the stateid unless the server
5055 * informs us the stateid is unrecognized. */
89af2739
CL		 5056 if (status != -NFS4ERR_BAD_STATEID)
5057 nfs41_free_stateid(server,
5058 &lsp->ls_stateid);
795a88c9 5059 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5060 ret = status;
5061 }
5062 }
5063 };
5064
5065 return ret;
5066}
5067
5068static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5069{
5070 int status = NFS_OK;
5071
5072 if (test_bit(LK_STATE_IN_USE, &state->flags))
5073 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5074 if (status != NFS_OK)
5075 status = nfs4_lock_expired(state, request);
5076 return status;
f062eb6c
BS		 5077}
5078#endif
5079
1da177e4
LT		 5080static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5081{
9a99af49 5082 struct nfs4_state_owner *sp = state->owner;
19e03c57 5083 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5084 unsigned char fl_flags = request->fl_flags;
9a99af49 5085 unsigned int seq;
8e469ebd 5086 int status = -ENOLCK;
1da177e4 5087
8e469ebd
TM		 5088 if ((fl_flags & FL_POSIX) &&
5089 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5090 goto out;
6bfc93ef 5091 /* Is this a delegated open? */
6bfc93ef
TM		 5092 status = nfs4_set_lock_state(state, request);
5093 if (status != 0)
5094 goto out;
01c3b861
TM		 5095 request->fl_flags |= FL_ACCESS;
5096 status = do_vfs_lock(request->fl_file, request);
5097 if (status < 0)
5098 goto out;
19e03c57 5099 down_read(&nfsi->rwsem);
01c3b861 5100 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5101 /* Yes: cache locks! */
01c3b861 5102 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5103 request->fl_flags = fl_flags & ~FL_SLEEP;
5104 status = do_vfs_lock(request->fl_file, request);
5105 goto out_unlock;
01c3b861 5106 }
9a99af49
TM		 5107 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5108 up_read(&nfsi->rwsem);
afe6c27c 5109 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5110 if (status != 0)
9a99af49
TM		 5111 goto out;
5112 down_read(&nfsi->rwsem);
5113 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5114 status = -NFS4ERR_DELAY;
01c3b861 5115 goto out_unlock;
9a99af49 5116 }
6bfc93ef 5117 /* Note: we always want to sleep here! */
01c3b861 5118 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5119 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5120 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5121 "manager!\n", __func__);
01c3b861 5122out_unlock:
19e03c57 5123 up_read(&nfsi->rwsem);
01c3b861
TM		 5124out:
5125 request->fl_flags = fl_flags;
1da177e4
LT		 5126 return status;
5127}
5128
5129static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5130{
a1d0b5ee
TM		 5131 struct nfs4_exception exception = {
5132 .state = state,
05ffe24f 5133 .inode = state->inode,
a1d0b5ee 5134 };
1da177e4
LT		 5135 int err;
5136
5137 do {
965b5d67
TM		 5138 err = _nfs4_proc_setlk(state, cmd, request);
5139 if (err == -NFS4ERR_DENIED)
5140 err = -EAGAIN;
1da177e4 5141 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5142 err, &exception);
1da177e4
LT		 5143 } while (exception.retry);
5144 return err;
5145}
5146
5147static int
5148nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5149{
5150 struct nfs_open_context *ctx;
5151 struct nfs4_state *state;
5152 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5153 int status;
5154
5155 /* verify open state */
cd3758e3 5156 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5157 state = ctx->state;
5158
5159 if (request->fl_start < 0 || request->fl_end < 0)
5160 return -EINVAL;
5161
d953126a
TM		 5162 if (IS_GETLK(cmd)) {
5163 if (state != NULL)
5164 return nfs4_proc_getlk(state, F_GETLK, request);
5165 return 0;
5166 }
1da177e4
LT		 5167
5168 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5169 return -EINVAL;
5170
d953126a
TM		 5171 if (request->fl_type == F_UNLCK) {
5172 if (state != NULL)
5173 return nfs4_proc_unlck(state, cmd, request);
5174 return 0;
5175 }
1da177e4 5176
d953126a
TM		 5177 if (state == NULL)
5178 return -ENOLCK;
55725513
TM		 5179 /*
5180 * Don't rely on the VFS having checked the file open mode,
5181 * since it won't do this for flock() locks.
5182 */
f44106e2 5183 switch (request->fl_type) {
55725513
TM		 5184 case F_RDLCK:
5185 if (!(filp->f_mode & FMODE_READ))
5186 return -EBADF;
5187 break;
5188 case F_WRLCK:
5189 if (!(filp->f_mode & FMODE_WRITE))
5190 return -EBADF;
5191 }
5192
1da177e4
LT		 5193 do {
5194 status = nfs4_proc_setlk(state, cmd, request);
5195 if ((status != -EAGAIN) || IS_SETLK(cmd))
5196 break;
5197 timeout = nfs4_set_lock_task_retry(timeout);
5198 status = -ERESTARTSYS;
5199 if (signalled())
5200 break;
5201 } while(status < 0);
1da177e4
LT		 5202 return status;
5203}
5204
db4f2e63 5205int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5206{
5207 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5208 int err;
5209
5210 err = nfs4_set_lock_state(state, fl);
5211 if (err != 0)
db4f2e63 5212 return err;
4a706fa0 5213 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5214 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5215}
6b3b5496 5216
cf470c3e
TM		 5217struct nfs_release_lockowner_data {
5218 struct nfs4_lock_state *lsp;
5ae67c4f 5219 struct nfs_server *server;
cf470c3e
TM		 5220 struct nfs_release_lockowner_args args;
5221};
5222
d3c7b7cc
TM		 5223static void nfs4_release_lockowner_release(void *calldata)
5224{
cf470c3e 5225 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5226 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5227 kfree(calldata);
5228}
5229
17280175 5230static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5231 .rpc_release = nfs4_release_lockowner_release,
5232};
5233
cf470c3e 5234int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 5235{
5236 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 5237 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5238 struct rpc_message msg = {
5239 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5240 };
5241
5242 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5243 return -EINVAL;
5244 data = kmalloc(sizeof(*data), GFP_NOFS);
5245 if (!data)
5246 return -ENOMEM;
5247 data->lsp = lsp;
5ae67c4f 5248 data->server = server;
cf470c3e
TM		 5249 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5250 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5251 data->args.lock_owner.s_dev = server->s_dev;
5252 msg.rpc_argp = &data->args;
5253 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5254 return 0;
d3c7b7cc
TM		 5255}
5256
aa1870af
BF		 5257#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5258
64c2ce8b
AK		 5259static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5260 const void *buf, size_t buflen,
5261 int flags, int type)
6b3b5496 5262{
64c2ce8b
AK		 5263 if (strcmp(key, "") != 0)
5264 return -EINVAL;
4b580ee3 5265
64c2ce8b 5266 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5267}
5268
64c2ce8b
AK		 5269static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5270 void *buf, size_t buflen, int type)
6b3b5496 5271{
64c2ce8b
AK		 5272 if (strcmp(key, "") != 0)
5273 return -EINVAL;
aa1870af 5274
64c2ce8b 5275 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5276}
5277
64c2ce8b
AK		 5278static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5279 size_t list_len, const char *name,
5280 size_t name_len, int type)
6b3b5496 5281{
64c2ce8b 5282 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5283
096455a2
BF		 5284 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5285 return 0;
64c2ce8b
AK		 5286
5287 if (list && len <= list_len)
5288 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5289 return len;
6b3b5496
BF		 5290}
5291
533eb461
AA		 5292/*
5293 * nfs_fhget will use either the mounted_on_fileid or the fileid
5294 */
69aaaae1
TM		 5295static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5296{
533eb461
AA		 5297 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5298 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5299 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5300 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5301 return;
5302
5303 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5304 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5305 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5306 fattr->nlink = 2;
5307}
5308
f05d147f
BS		 5309static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5310 const struct qstr *name,
5311 struct nfs4_fs_locations *fs_locations,
5312 struct page *page)
683b57b4
TM		 5313{
5314 struct nfs_server *server = NFS_SERVER(dir);
5315 u32 bitmask[2] = {
361e624f 5316 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5317 };
5318 struct nfs4_fs_locations_arg args = {
5319 .dir_fh = NFS_FH(dir),
c228fd3a 5320 .name = name,
683b57b4
TM		 5321 .page = page,
5322 .bitmask = bitmask,
5323 };
22958463
BH		 5324 struct nfs4_fs_locations_res res = {
5325 .fs_locations = fs_locations,
5326 };
683b57b4
TM		 5327 struct rpc_message msg = {
5328 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5329 .rpc_argp = &args,
22958463 5330 .rpc_resp = &res,
683b57b4
TM		 5331 };
5332 int status;
5333
3110ff80 5334 dprintk("%s: start\n", __func__);
533eb461
AA		 5335
5336 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5337 * is not supported */
5338 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5339 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5340 else
5341 bitmask[0] |= FATTR4_WORD0_FILEID;
5342
c228fd3a 5343 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5344 fs_locations->server = server;
830b8e33 5345 fs_locations->nlocations = 0;
f05d147f 5346 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5347 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5348 return status;
5349}
5350
f05d147f
BS		 5351int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5352 const struct qstr *name,
5353 struct nfs4_fs_locations *fs_locations,
5354 struct page *page)
db0a9593
BS		 5355{
5356 struct nfs4_exception exception = { };
5357 int err;
5358 do {
5359 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5360 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5361 &exception);
5362 } while (exception.retry);
5363 return err;
5364}
5365
5a5ea0d4
BS		 5366static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5367{
5368 int status;
5369 struct nfs4_secinfo_arg args = {
5370 .dir_fh = NFS_FH(dir),
5371 .name = name,
5372 };
5373 struct nfs4_secinfo_res res = {
5374 .flavors = flavors,
5375 };
5376 struct rpc_message msg = {
5377 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5378 .rpc_argp = &args,
5379 .rpc_resp = &res,
5380 };
5381
5382 dprintk("NFS call secinfo %s\n", name->name);
5383 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5384 dprintk("NFS reply secinfo: %d\n", status);
5385 return status;
5386}
5387
72de53ec
BS		 5388int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5389 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5390{
5391 struct nfs4_exception exception = { };
5392 int err;
5393 do {
5394 err = nfs4_handle_exception(NFS_SERVER(dir),
5395 _nfs4_proc_secinfo(dir, name, flavors),
5396 &exception);
5397 } while (exception.retry);
5398 return err;
5399}
5400
557134a3 5401#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5402/*
5403 * Check the exchange flags returned by the server for invalid flags, having
5404 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5405 * DS flags set.
5406 */
5407static int nfs4_check_cl_exchange_flags(u32 flags)
5408{
5409 if (flags & ~EXCHGID4_FLAG_MASK_R)
5410 goto out_inval;
5411 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5412 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5413 goto out_inval;
5414 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5415 goto out_inval;
5416 return NFS_OK;
5417out_inval:
5418 return -NFS4ERR_INVAL;
5419}
5420
78fe0f41 5421static bool
79d4e1f0
CL		 5422nfs41_same_server_scope(struct nfs41_server_scope *a,
5423 struct nfs41_server_scope *b)
78fe0f41
WAA		 5424{
5425 if (a->server_scope_sz == b->server_scope_sz &&
5426 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5427 return true;
5428
5429 return false;
5430}
5431
7c44f1ae
WAA		 5432/*
5433 * nfs4_proc_bind_conn_to_session()
5434 *
5435 * The 4.1 client currently uses the same TCP connection for the
5436 * fore and backchannel.
5437 */
2cf047c9 5438int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5439{
5440 int status;
5441 struct nfs41_bind_conn_to_session_res res;
5442 struct rpc_message msg = {
5443 .rpc_proc =
5444 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5445 .rpc_argp = clp,
5446 .rpc_resp = &res,
2cf047c9 5447 .rpc_cred = cred,
7c44f1ae
WAA		 5448 };
5449
5450 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5451
5452 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5453 if (unlikely(res.session == NULL)) {
5454 status = -ENOMEM;
5455 goto out;
5456 }
5457
5458 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5459 if (status == 0) {
5460 if (memcmp(res.session->sess_id.data,
5461 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5462 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5463 status = -EIO;
5464 goto out_session;
5465 }
5466 if (res.dir != NFS4_CDFS4_BOTH) {
5467 dprintk("NFS: %s: Unexpected direction from server\n",
5468 __func__);
5469 status = -EIO;
5470 goto out_session;
5471 }
5472 if (res.use_conn_in_rdma_mode) {
5473 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5474 __func__);
5475 status = -EIO;
5476 goto out_session;
5477 }
5478 }
5479out_session:
5480 kfree(res.session);
5481out:
5482 dprintk("<-- %s status= %d\n", __func__, status);
5483 return status;
5484}
5485
99fe60d0
BH		 5486/*
5487 * nfs4_proc_exchange_id()
5488 *
6bbb4ae8
CL		 5489 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5490 *
99fe60d0
BH		 5491 * Since the clientid has expired, all compounds using sessions
5492 * associated with the stale clientid will be returning
5493 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5494 * be in some phase of session reset.
5495 */
4d643d1d 5496int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5497{
5498 nfs4_verifier verifier;
5499 struct nfs41_exchange_id_args args = {
cd93710e 5500 .verifier = &verifier,
99fe60d0 5501 .client = clp,
357f54d6 5502 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5503 };
5504 struct nfs41_exchange_id_res res = {
32b01310 5505 0
99fe60d0
BH		 5506 };
5507 int status;
5508 struct rpc_message msg = {
5509 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5510 .rpc_argp = &args,
5511 .rpc_resp = &res,
5512 .rpc_cred = cred,
5513 };
99fe60d0 5514
f092075d 5515 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5516 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5517 sizeof(args.id));
6bbb4ae8
CL		 5518 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5519 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5520 args.id_len, args.id);
99fe60d0 5521
acdeb69d 5522 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5523 GFP_NOFS);
acdeb69d 5524 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5525 status = -ENOMEM;
5526 goto out;
5527 }
78fe0f41 5528
79d4e1f0 5529 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5530 GFP_NOFS);
177313f1 5531 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5532 status = -ENOMEM;
acdeb69d 5533 goto out_server_owner;
abe9a6d5 5534 }
78fe0f41 5535
bbafffd2 5536 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5537 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5538 status = -ENOMEM;
5539 goto out_server_scope;
5540 }
5541
1bd714f2 5542 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5543 if (status == 0)
32b01310 5544 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5545
acdeb69d 5546 if (status == 0) {
32b01310
TM		 5547 clp->cl_clientid = res.clientid;
5548 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5549 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5550 clp->cl_seqid = res.seqid;
5551
acdeb69d
CL		 5552 kfree(clp->cl_serverowner);
5553 clp->cl_serverowner = res.server_owner;
5554 res.server_owner = NULL;
78fe0f41 5555
7d2ed9ac 5556 /* use the most recent implementation id */
59155546
CL		 5557 kfree(clp->cl_implid);
5558 clp->cl_implid = res.impl_id;
7d2ed9ac 5559
177313f1 5560 if (clp->cl_serverscope != NULL &&
79d4e1f0 5561 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5562 res.server_scope)) {
5563 dprintk("%s: server_scope mismatch detected\n",
5564 __func__);
5565 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5566 kfree(clp->cl_serverscope);
5567 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5568 }
5569
177313f1 5570 if (clp->cl_serverscope == NULL) {
79d4e1f0 5571 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5572 goto out;
5573 }
32b01310
TM		 5574 } else
5575 kfree(res.impl_id);
7d2ed9ac 5576
acdeb69d
CL		 5577out_server_owner:
5578 kfree(res.server_owner);
7d2ed9ac 5579out_server_scope:
abe9a6d5
WAA		 5580 kfree(res.server_scope);
5581out:
177313f1 5582 if (clp->cl_implid != NULL)
6bbb4ae8 5583 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5584 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5585 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5586 clp->cl_implid->date.seconds,
5587 clp->cl_implid->date.nseconds);
6bbb4ae8 5588 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5589 return status;
5590}
5591
66245539
TM		 5592static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5593 struct rpc_cred *cred)
5594{
5595 struct rpc_message msg = {
5596 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5597 .rpc_argp = clp,
5598 .rpc_cred = cred,
5599 };
5600 int status;
5601
5602 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5603 if (status)
02c67525 5604 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5605 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5606 return status;
5607}
5608
5609static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5610 struct rpc_cred *cred)
5611{
5612 unsigned int loop;
5613 int ret;
5614
5615 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5616 ret = _nfs4_proc_destroy_clientid(clp, cred);
5617 switch (ret) {
5618 case -NFS4ERR_DELAY:
5619 case -NFS4ERR_CLIENTID_BUSY:
5620 ssleep(1);
5621 break;
5622 default:
5623 return ret;
5624 }
5625 }
5626 return 0;
5627}
5628
5629int nfs4_destroy_clientid(struct nfs_client *clp)
5630{
5631 struct rpc_cred *cred;
5632 int ret = 0;
5633
5634 if (clp->cl_mvops->minor_version < 1)
5635 goto out;
5636 if (clp->cl_exchange_flags == 0)
5637 goto out;
05f4c350
CL		 5638 if (clp->cl_preserve_clid)
5639 goto out;
66245539
TM		 5640 cred = nfs4_get_exchange_id_cred(clp);
5641 ret = nfs4_proc_destroy_clientid(clp, cred);
5642 if (cred)
5643 put_rpccred(cred);
5644 switch (ret) {
5645 case 0:
5646 case -NFS4ERR_STALE_CLIENTID:
5647 clp->cl_exchange_flags = 0;
5648 }
5649out:
5650 return ret;
5651}
5652
2050f0cc
AA		 5653struct nfs4_get_lease_time_data {
5654 struct nfs4_get_lease_time_args *args;
5655 struct nfs4_get_lease_time_res *res;
5656 struct nfs_client *clp;
5657};
5658
5659static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5660 void *calldata)
5661{
2050f0cc
AA		 5662 struct nfs4_get_lease_time_data *data =
5663 (struct nfs4_get_lease_time_data *)calldata;
5664
5665 dprintk("--> %s\n", __func__);
5666 /* just setup sequence, do not trigger session recovery
5667 since we're invoked within one */
d9afbd1b
TM		 5668 nfs41_setup_sequence(data->clp->cl_session,
5669 &data->args->la_seq_args,
5670 &data->res->lr_seq_res,
5671 task);
2050f0cc
AA		 5672 dprintk("<-- %s\n", __func__);
5673}
5674
5675/*
5676 * Called from nfs4_state_manager thread for session setup, so don't recover
5677 * from sequence operation or clientid errors.
5678 */
5679static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5680{
5681 struct nfs4_get_lease_time_data *data =
5682 (struct nfs4_get_lease_time_data *)calldata;
5683
5684 dprintk("--> %s\n", __func__);
14516c3a
TM		 5685 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5686 return;
2050f0cc
AA		 5687 switch (task->tk_status) {
5688 case -NFS4ERR_DELAY:
5689 case -NFS4ERR_GRACE:
5690 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5691 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5692 task->tk_status = 0;
a8a4ae3a
AA		 5693 /* fall through */
5694 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5695 rpc_restart_call_prepare(task);
2050f0cc
AA		 5696 return;
5697 }
2050f0cc
AA		 5698 dprintk("<-- %s\n", __func__);
5699}
5700
17280175 5701static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5702 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5703 .rpc_call_done = nfs4_get_lease_time_done,
5704};
5705
5706int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5707{
5708 struct rpc_task *task;
5709 struct nfs4_get_lease_time_args args;
5710 struct nfs4_get_lease_time_res res = {
5711 .lr_fsinfo = fsinfo,
5712 };
5713 struct nfs4_get_lease_time_data data = {
5714 .args = &args,
5715 .res = &res,
5716 .clp = clp,
5717 };
5718 struct rpc_message msg = {
5719 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5720 .rpc_argp = &args,
5721 .rpc_resp = &res,
5722 };
5723 struct rpc_task_setup task_setup = {
5724 .rpc_client = clp->cl_rpcclient,
5725 .rpc_message = &msg,
5726 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5727 .callback_data = &data,
5728 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5729 };
5730 int status;
5731
9d12b216 5732 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5733 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5734 dprintk("--> %s\n", __func__);
5735 task = rpc_run_task(&task_setup);
5736
5737 if (IS_ERR(task))
5738 status = PTR_ERR(task);
5739 else {
5740 status = task->tk_status;
5741 rpc_put_task(task);
5742 }
5743 dprintk("<-- %s return %d\n", __func__, status);
5744
5745 return status;
5746}
5747
fc931582
AA		 5748/*
5749 * Initialize the values to be used by the client in CREATE_SESSION
5750 * If nfs4_init_session set the fore channel request and response sizes,
5751 * use them.
5752 *
5753 * Set the back channel max_resp_sz_cached to zero to force the client to
5754 * always set csa_cachethis to FALSE because the current implementation
5755 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5756 */
5757static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5758{
5759 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5760 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5761 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5762
5763 if (mxrqst_sz == 0)
5764 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5765 if (mxresp_sz == 0)
5766 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5767 /* Fore channel attributes */
fc931582
AA		 5768 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5769 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5770 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5771 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5772
5773 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5774 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5775 __func__,
5776 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5777 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5778
5779 /* Back channel attributes */
fc931582
AA		 5780 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5781 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5782 args->bc_attrs.max_resp_sz_cached = 0;
5783 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5784 args->bc_attrs.max_reqs = 1;
5785
5786 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5787 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5788 __func__,
5789 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5790 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5791 args->bc_attrs.max_reqs);
5792}
5793
43c2e885 5794static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5795{
43c2e885
BF		 5796 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5797 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5798
43c2e885
BF		 5799 if (rcvd->max_resp_sz > sent->max_resp_sz)
5800 return -EINVAL;
5801 /*
5802 * Our requested max_ops is the minimum we need; we're not
5803 * prepared to break up compounds into smaller pieces than that.
5804 * So, no point even trying to continue if the server won't
5805 * cooperate:
5806 */
5807 if (rcvd->max_ops < sent->max_ops)
5808 return -EINVAL;
5809 if (rcvd->max_reqs == 0)
5810 return -EINVAL;
b4b9a0c1
VG		 5811 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5812 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5813 return 0;
8d35301d
AA		 5814}
5815
43c2e885
BF		 5816static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5817{
5818 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5819 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5820
43c2e885
BF		 5821 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5822 return -EINVAL;
5823 if (rcvd->max_resp_sz < sent->max_resp_sz)
5824 return -EINVAL;
5825 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5826 return -EINVAL;
5827 /* These would render the backchannel useless: */
b4b9a0c1 5828 if (rcvd->max_ops != sent->max_ops)
43c2e885 5829 return -EINVAL;
b4b9a0c1 5830 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5831 return -EINVAL;
5832 return 0;
5833}
8d35301d 5834
8d35301d
AA		 5835static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5836 struct nfs4_session *session)
5837{
43c2e885 5838 int ret;
8d35301d 5839
43c2e885
BF		 5840 ret = nfs4_verify_fore_channel_attrs(args, session);
5841 if (ret)
5842 return ret;
5843 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5844}
5845
848f5bda
TM		 5846static int _nfs4_proc_create_session(struct nfs_client *clp,
5847 struct rpc_cred *cred)
fc931582
AA		 5848{
5849 struct nfs4_session *session = clp->cl_session;
5850 struct nfs41_create_session_args args = {
5851 .client = clp,
5852 .cb_program = NFS4_CALLBACK,
5853 };
5854 struct nfs41_create_session_res res = {
5855 .client = clp,
5856 };
5857 struct rpc_message msg = {
5858 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5859 .rpc_argp = &args,
5860 .rpc_resp = &res,
848f5bda 5861 .rpc_cred = cred,
fc931582
AA		 5862 };
5863 int status;
5864
5865 nfs4_init_channel_attrs(&args);
0f91421e 5866 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5867
1bd714f2 5868 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5869
43095d39 5870 if (!status) {
8d35301d
AA		 5871 /* Verify the session's negotiated channel_attrs values */
5872 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5873 /* Increment the clientid slot sequence id */
5874 clp->cl_seqid++;
5875 }
5876
5877 return status;
5878}
5879
5880/*
5881 * Issues a CREATE_SESSION operation to the server.
5882 * It is the responsibility of the caller to verify the session is
5883 * expired before calling this routine.
5884 */
848f5bda 5885int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5886{
5887 int status;
5888 unsigned *ptr;
fc931582
AA		 5889 struct nfs4_session *session = clp->cl_session;
5890
5891 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5892
848f5bda 5893 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5894 if (status)
5895 goto out;
5896
aacd5537
AA		 5897 /* Init or reset the session slot tables */
5898 status = nfs4_setup_session_slot_tables(session);
5899 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5900 if (status)
5901 goto out;
5902
5903 ptr = (unsigned *)&session->sess_id.data[0];
5904 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5905 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5906out:
5907 dprintk("<-- %s\n", __func__);
5908 return status;
5909}
5910
0f3e66c6
AA		 5911/*
5912 * Issue the over-the-wire RPC DESTROY_SESSION.
5913 * The caller must serialize access to this routine.
5914 */
848f5bda
TM		 5915int nfs4_proc_destroy_session(struct nfs4_session *session,
5916 struct rpc_cred *cred)
0f3e66c6 5917{
848f5bda
TM		 5918 struct rpc_message msg = {
5919 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5920 .rpc_argp = session,
5921 .rpc_cred = cred,
5922 };
0f3e66c6 5923 int status = 0;
0f3e66c6
AA		 5924
5925 dprintk("--> nfs4_proc_destroy_session\n");
5926
5927 /* session is still being setup */
5928 if (session->clp->cl_cons_state != NFS_CS_READY)
5929 return status;
5930
1bd714f2 5931 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5932
5933 if (status)
08106ac7 5934 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5935 "Session has been destroyed regardless...\n", status);
5936
5937 dprintk("<-- nfs4_proc_destroy_session\n");
5938 return status;
5939}
5940
fc01cea9
AA		 5941/*
5942 * Renew the cl_session lease.
5943 */
d5f8d3fe
TM		 5944struct nfs4_sequence_data {
5945 struct nfs_client *clp;
5946 struct nfs4_sequence_args args;
5947 struct nfs4_sequence_res res;
5948};
5949
dc96aef9
AB		 5950static void nfs41_sequence_release(void *data)
5951{
d5f8d3fe
TM		 5952 struct nfs4_sequence_data *calldata = data;
5953 struct nfs_client *clp = calldata->clp;
dc96aef9 5954
7135840f
AB		 5955 if (atomic_read(&clp->cl_count) > 1)
5956 nfs4_schedule_state_renewal(clp);
5957 nfs_put_client(clp);
d5f8d3fe 5958 kfree(calldata);
dc96aef9
AB		 5959}
5960
aa5190d0
TM		 5961static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5962{
5963 switch(task->tk_status) {
5964 case -NFS4ERR_DELAY:
aa5190d0
TM		 5965 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5966 return -EAGAIN;
5967 default:
0400a6b0 5968 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5969 }
5970 return 0;
5971}
5972
dc96aef9 5973static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5974{
d5f8d3fe
TM		 5975 struct nfs4_sequence_data *calldata = data;
5976 struct nfs_client *clp = calldata->clp;
fc01cea9 5977
14516c3a
TM		 5978 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5979 return;
fc01cea9
AA		 5980
5981 if (task->tk_status < 0) {
5982 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5983 if (atomic_read(&clp->cl_count) == 1)
5984 goto out;
fc01cea9 5985
aa5190d0
TM		 5986 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5987 rpc_restart_call_prepare(task);
fc01cea9
AA		 5988 return;
5989 }
5990 }
fc01cea9 5991 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5992out:
fc01cea9
AA		 5993 dprintk("<-- %s\n", __func__);
5994}
5995
5996static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5997{
d5f8d3fe
TM		 5998 struct nfs4_sequence_data *calldata = data;
5999 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6000 struct nfs4_sequence_args *args;
6001 struct nfs4_sequence_res *res;
6002
fc01cea9
AA		 6003 args = task->tk_msg.rpc_argp;
6004 res = task->tk_msg.rpc_resp;
6005
d9afbd1b 6006 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 6007}
6008
6009static const struct rpc_call_ops nfs41_sequence_ops = {
6010 .rpc_call_done = nfs41_sequence_call_done,
6011 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6012 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6013};
6014
8fe72bac
TM		 6015static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6016 struct rpc_cred *cred,
6017 bool is_privileged)
fc01cea9 6018{
d5f8d3fe 6019 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6020 struct rpc_message msg = {
6021 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6022 .rpc_cred = cred,
6023 };
71ac6da9
TM		 6024 struct rpc_task_setup task_setup_data = {
6025 .rpc_client = clp->cl_rpcclient,
6026 .rpc_message = &msg,
8fe72bac 6027 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 6028 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 6029 };
fc01cea9 6030
7135840f 6031 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6032 return ERR_PTR(-EIO);
dfb4f309 6033 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6034 if (calldata == NULL) {
7135840f 6035 nfs_put_client(clp);
71ac6da9 6036 return ERR_PTR(-ENOMEM);
fc01cea9 6037 }
9d12b216 6038 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6039 if (is_privileged)
6040 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6041 msg.rpc_argp = &calldata->args;
6042 msg.rpc_resp = &calldata->res;
6043 calldata->clp = clp;
71ac6da9 6044 task_setup_data.callback_data = calldata;
fc01cea9 6045
71ac6da9
TM		 6046 return rpc_run_task(&task_setup_data);
6047}
6048
2f60ea6b 6049static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6050{
6051 struct rpc_task *task;
6052 int ret = 0;
6053
2f60ea6b
TM		 6054 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6055 return 0;
8fe72bac 6056 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6057 if (IS_ERR(task))
6058 ret = PTR_ERR(task);
6059 else
bf294b41 6060 rpc_put_task_async(task);
71ac6da9
TM		 6061 dprintk("<-- %s status=%d\n", __func__, ret);
6062 return ret;
6063}
6064
6065static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6066{
6067 struct rpc_task *task;
6068 int ret;
6069
8fe72bac 6070 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6071 if (IS_ERR(task)) {
6072 ret = PTR_ERR(task);
6073 goto out;
6074 }
6075 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6076 if (!ret) {
6077 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6078
6079 if (task->tk_status == 0)
6080 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6081 ret = task->tk_status;
b4410c2f 6082 }
71ac6da9
TM		 6083 rpc_put_task(task);
6084out:
6085 dprintk("<-- %s status=%d\n", __func__, ret);
6086 return ret;
fc01cea9
AA		 6087}
6088
fce5c838
RL		 6089struct nfs4_reclaim_complete_data {
6090 struct nfs_client *clp;
6091 struct nfs41_reclaim_complete_args arg;
6092 struct nfs41_reclaim_complete_res res;
6093};
6094
6095static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6096{
6097 struct nfs4_reclaim_complete_data *calldata = data;
6098
d9afbd1b
TM		 6099 nfs41_setup_sequence(calldata->clp->cl_session,
6100 &calldata->arg.seq_args,
6101 &calldata->res.seq_res,
6102 task);
fce5c838
RL		 6103}
6104
aa5190d0
TM		 6105static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6106{
6107 switch(task->tk_status) {
6108 case 0:
6109 case -NFS4ERR_COMPLETE_ALREADY:
6110 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6111 break;
6112 case -NFS4ERR_DELAY:
aa5190d0 6113 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6114 /* fall through */
6115 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6116 return -EAGAIN;
6117 default:
0400a6b0 6118 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6119 }
6120 return 0;
6121}
6122
fce5c838
RL		 6123static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6124{
6125 struct nfs4_reclaim_complete_data *calldata = data;
6126 struct nfs_client *clp = calldata->clp;
6127 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6128
6129 dprintk("--> %s\n", __func__);
14516c3a
TM		 6130 if (!nfs41_sequence_done(task, res))
6131 return;
fce5c838 6132
aa5190d0
TM		 6133 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6134 rpc_restart_call_prepare(task);
6135 return;
6136 }
fce5c838
RL		 6137 dprintk("<-- %s\n", __func__);
6138}
6139
6140static void nfs4_free_reclaim_complete_data(void *data)
6141{
6142 struct nfs4_reclaim_complete_data *calldata = data;
6143
6144 kfree(calldata);
6145}
6146
6147static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6148 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6149 .rpc_call_done = nfs4_reclaim_complete_done,
6150 .rpc_release = nfs4_free_reclaim_complete_data,
6151};
6152
6153/*
6154 * Issue a global reclaim complete.
6155 */
6156static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6157{
6158 struct nfs4_reclaim_complete_data *calldata;
6159 struct rpc_task *task;
6160 struct rpc_message msg = {
6161 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6162 };
6163 struct rpc_task_setup task_setup_data = {
6164 .rpc_client = clp->cl_rpcclient,
6165 .rpc_message = &msg,
6166 .callback_ops = &nfs4_reclaim_complete_call_ops,
6167 .flags = RPC_TASK_ASYNC,
6168 };
6169 int status = -ENOMEM;
6170
6171 dprintk("--> %s\n", __func__);
8535b2be 6172 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6173 if (calldata == NULL)
6174 goto out;
6175 calldata->clp = clp;
6176 calldata->arg.one_fs = 0;
fce5c838 6177
9d12b216 6178 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6179 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6180 msg.rpc_argp = &calldata->arg;
6181 msg.rpc_resp = &calldata->res;
6182 task_setup_data.callback_data = calldata;
6183 task = rpc_run_task(&task_setup_data);
acf82b85 6184 if (IS_ERR(task)) {
fce5c838 6185 status = PTR_ERR(task);
acf82b85
DC		 6186 goto out;
6187 }
c34c32ea
AA		 6188 status = nfs4_wait_for_completion_rpc_task(task);
6189 if (status == 0)
6190 status = task->tk_status;
fce5c838 6191 rpc_put_task(task);
acf82b85 6192 return 0;
fce5c838
RL		 6193out:
6194 dprintk("<-- %s status=%d\n", __func__, status);
6195 return status;
6196}
b1f69b75
AA		 6197
6198static void
6199nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6200{
6201 struct nfs4_layoutget *lgp = calldata;
c31663d4 6202 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6203 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6204
6205 dprintk("--> %s\n", __func__);
c31663d4
FI		 6206 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6207 * right now covering the LAYOUTGET we are about to send.
6208 * However, that is not so catastrophic, and there seems
6209 * to be no way to prevent it completely.
6210 */
6ba7db34 6211 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6212 &lgp->res.seq_res, task))
b1f69b75 6213 return;
cf7d63f1
FI		 6214 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6215 NFS_I(lgp->args.inode)->layout,
6216 lgp->args.ctx->state)) {
6217 rpc_exit(task, NFS4_OK);
cf7d63f1 6218 }
b1f69b75
AA		 6219}
6220
6221static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6222{
6223 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6224 struct inode *inode = lgp->args.inode;
6225 struct nfs_server *server = NFS_SERVER(inode);
6226 struct pnfs_layout_hdr *lo;
6227 struct nfs4_state *state = NULL;
30005121 6228 unsigned long timeo, giveup;
b1f69b75
AA		 6229
6230 dprintk("--> %s\n", __func__);
6231
6ba7db34 6232 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6233 goto out;
b1f69b75
AA		 6234
6235 switch (task->tk_status) {
6236 case 0:
ee314c2a 6237 goto out;
b1f69b75
AA		 6238 case -NFS4ERR_LAYOUTTRYLATER:
6239 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6240 timeo = rpc_get_timeout(task->tk_client);
6241 giveup = lgp->args.timestamp + timeo;
6242 if (time_after(giveup, jiffies))
6243 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6244 break;
6245 case -NFS4ERR_EXPIRED:
6246 case -NFS4ERR_BAD_STATEID:
6247 spin_lock(&inode->i_lock);
6248 lo = NFS_I(inode)->layout;
6249 if (!lo || list_empty(&lo->plh_segs)) {
6250 spin_unlock(&inode->i_lock);
6251 /* If the open stateid was bad, then recover it. */
6252 state = lgp->args.ctx->state;
6253 } else {
6254 LIST_HEAD(head);
6255
6256 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6257 spin_unlock(&inode->i_lock);
6258 /* Mark the bad layout state as invalid, then
6259 * retry using the open stateid. */
6260 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6261 }
6262 }
ee314c2a
TM		 6263 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6264 rpc_restart_call_prepare(task);
6265out:
b1f69b75
AA		 6266 dprintk("<-- %s\n", __func__);
6267}
6268
8554116e
IK		 6269static size_t max_response_pages(struct nfs_server *server)
6270{
6271 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6272 return nfs_page_array_len(0, max_resp_sz);
6273}
6274
6275static void nfs4_free_pages(struct page **pages, size_t size)
6276{
6277 int i;
6278
6279 if (!pages)
6280 return;
6281
6282 for (i = 0; i < size; i++) {
6283 if (!pages[i])
6284 break;
6285 __free_page(pages[i]);
6286 }
6287 kfree(pages);
6288}
6289
6290static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6291{
6292 struct page **pages;
6293 int i;
6294
6295 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6296 if (!pages) {
6297 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6298 return NULL;
6299 }
6300
6301 for (i = 0; i < size; i++) {
6302 pages[i] = alloc_page(gfp_flags);
6303 if (!pages[i]) {
6304 dprintk("%s: failed to allocate page\n", __func__);
6305 nfs4_free_pages(pages, size);
6306 return NULL;
6307 }
6308 }
6309
6310 return pages;
6311}
6312
b1f69b75
AA		 6313static void nfs4_layoutget_release(void *calldata)
6314{
6315 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6316 struct inode *inode = lgp->args.inode;
6317 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6318 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6319
6320 dprintk("--> %s\n", __func__);
8554116e 6321 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6322 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6323 put_nfs_open_context(lgp->args.ctx);
6324 kfree(calldata);
6325 dprintk("<-- %s\n", __func__);
6326}
6327
6328static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6329 .rpc_call_prepare = nfs4_layoutget_prepare,
6330 .rpc_call_done = nfs4_layoutget_done,
6331 .rpc_release = nfs4_layoutget_release,
6332};
6333
a0b0a6e3
TM		 6334struct pnfs_layout_segment *
6335nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6336{
a47970ff
WAA		 6337 struct inode *inode = lgp->args.inode;
6338 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6339 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6340 struct rpc_task *task;
6341 struct rpc_message msg = {
6342 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6343 .rpc_argp = &lgp->args,
6344 .rpc_resp = &lgp->res,
6345 };
6346 struct rpc_task_setup task_setup_data = {
6347 .rpc_client = server->client,
6348 .rpc_message = &msg,
6349 .callback_ops = &nfs4_layoutget_call_ops,
6350 .callback_data = lgp,
6351 .flags = RPC_TASK_ASYNC,
6352 };
a0b0a6e3 6353 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6354 int status = 0;
6355
6356 dprintk("--> %s\n", __func__);
6357
8554116e
IK		 6358 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6359 if (!lgp->args.layout.pages) {
6360 nfs4_layoutget_release(lgp);
a0b0a6e3 6361 return ERR_PTR(-ENOMEM);
8554116e
IK		 6362 }
6363 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6364 lgp->args.timestamp = jiffies;
8554116e 6365
35124a09 6366 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6367 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6368 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6369
6370 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6371 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6372
b1f69b75
AA		 6373 task = rpc_run_task(&task_setup_data);
6374 if (IS_ERR(task))
a0b0a6e3 6375 return ERR_CAST(task);
b1f69b75 6376 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6377 if (status == 0)
6378 status = task->tk_status;
085b7a45
WAA		 6379 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6380 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6381 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6382 rpc_put_task(task);
6383 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6384 if (status)
6385 return ERR_PTR(status);
6386 return lseg;
b1f69b75
AA		 6387}
6388
cbe82603
BH		 6389static void
6390nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6391{
6392 struct nfs4_layoutreturn *lrp = calldata;
6393
6394 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6395 nfs41_setup_sequence(lrp->clp->cl_session,
6396 &lrp->args.seq_args,
6397 &lrp->res.seq_res,
6398 task);
cbe82603
BH		 6399}
6400
6401static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6402{
6403 struct nfs4_layoutreturn *lrp = calldata;
6404 struct nfs_server *server;
6405
6406 dprintk("--> %s\n", __func__);
6407
6ba7db34 6408 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6409 return;
6410
6411 server = NFS_SERVER(lrp->args.inode);
6412 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6413 rpc_restart_call_prepare(task);
cbe82603
BH		 6414 return;
6415 }
cbe82603
BH		 6416 dprintk("<-- %s\n", __func__);
6417}
6418
6419static void nfs4_layoutreturn_release(void *calldata)
6420{
6421 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6422 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6423
6424 dprintk("--> %s\n", __func__);
849b286f
TM		 6425 spin_lock(&lo->plh_inode->i_lock);
6426 if (lrp->res.lrs_present)
6427 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6428 lo->plh_block_lgets--;
6429 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6430 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6431 kfree(calldata);
6432 dprintk("<-- %s\n", __func__);
6433}
6434
6435static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6436 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6437 .rpc_call_done = nfs4_layoutreturn_done,
6438 .rpc_release = nfs4_layoutreturn_release,
6439};
6440
6441int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6442{
6443 struct rpc_task *task;
6444 struct rpc_message msg = {
6445 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6446 .rpc_argp = &lrp->args,
6447 .rpc_resp = &lrp->res,
6448 };
6449 struct rpc_task_setup task_setup_data = {
6450 .rpc_client = lrp->clp->cl_rpcclient,
6451 .rpc_message = &msg,
6452 .callback_ops = &nfs4_layoutreturn_call_ops,
6453 .callback_data = lrp,
6454 };
6455 int status;
6456
6457 dprintk("--> %s\n", __func__);
9d12b216 6458 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6459 task = rpc_run_task(&task_setup_data);
6460 if (IS_ERR(task))
6461 return PTR_ERR(task);
6462 status = task->tk_status;
6463 dprintk("<-- %s status=%d\n", __func__, status);
6464 rpc_put_task(task);
6465 return status;
6466}
6467
7f11d8d3
AA		 6468/*
6469 * Retrieve the list of Data Server devices from the MDS.
6470 */
6471static int _nfs4_getdevicelist(struct nfs_server *server,
6472 const struct nfs_fh *fh,
6473 struct pnfs_devicelist *devlist)
6474{
6475 struct nfs4_getdevicelist_args args = {
6476 .fh = fh,
6477 .layoutclass = server->pnfs_curr_ld->id,
6478 };
6479 struct nfs4_getdevicelist_res res = {
6480 .devlist = devlist,
6481 };
6482 struct rpc_message msg = {
6483 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6484 .rpc_argp = &args,
6485 .rpc_resp = &res,
6486 };
6487 int status;
6488
6489 dprintk("--> %s\n", __func__);
6490 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6491 &res.seq_res, 0);
6492 dprintk("<-- %s status=%d\n", __func__, status);
6493 return status;
6494}
6495
6496int nfs4_proc_getdevicelist(struct nfs_server *server,
6497 const struct nfs_fh *fh,
6498 struct pnfs_devicelist *devlist)
6499{
6500 struct nfs4_exception exception = { };
6501 int err;
6502
6503 do {
6504 err = nfs4_handle_exception(server,
6505 _nfs4_getdevicelist(server, fh, devlist),
6506 &exception);
6507 } while (exception.retry);
6508
6509 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6510 err, devlist->num_devs);
6511
6512 return err;
6513}
6514EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6515
b1f69b75
AA		 6516static int
6517_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6518{
6519 struct nfs4_getdeviceinfo_args args = {
6520 .pdev = pdev,
6521 };
6522 struct nfs4_getdeviceinfo_res res = {
6523 .pdev = pdev,
6524 };
6525 struct rpc_message msg = {
6526 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6527 .rpc_argp = &args,
6528 .rpc_resp = &res,
6529 };
6530 int status;
6531
6532 dprintk("--> %s\n", __func__);
7c513058 6533 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6534 dprintk("<-- %s status=%d\n", __func__, status);
6535
6536 return status;
6537}
6538
6539int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6540{
6541 struct nfs4_exception exception = { };
6542 int err;
6543
6544 do {
6545 err = nfs4_handle_exception(server,
6546 _nfs4_proc_getdeviceinfo(server, pdev),
6547 &exception);
6548 } while (exception.retry);
6549 return err;
6550}
6551EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6552
863a3c6c
AA		 6553static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6554{
6555 struct nfs4_layoutcommit_data *data = calldata;
6556 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6557 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6558
d9afbd1b
TM		 6559 nfs41_setup_sequence(session,
6560 &data->args.seq_args,
6561 &data->res.seq_res,
6562 task);
863a3c6c
AA		 6563}
6564
6565static void
6566nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6567{
6568 struct nfs4_layoutcommit_data *data = calldata;
6569 struct nfs_server *server = NFS_SERVER(data->args.inode);
6570
6ba7db34 6571 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6572 return;
6573
6574 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6575 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6576 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6577 case -NFS4ERR_BADLAYOUT: /* no layout */
6578 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6579 task->tk_status = 0;
e59d27e0
TM		 6580 break;
6581 case 0:
863a3c6c
AA		 6582 nfs_post_op_update_inode_force_wcc(data->args.inode,
6583 data->res.fattr);
e59d27e0
TM		 6584 break;
6585 default:
6586 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6587 rpc_restart_call_prepare(task);
6588 return;
6589 }
6590 }
863a3c6c
AA		 6591}
6592
6593static void nfs4_layoutcommit_release(void *calldata)
6594{
6595 struct nfs4_layoutcommit_data *data = calldata;
6596
db29c089 6597 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 6598 put_rpccred(data->cred);
6599 kfree(data);
6600}
6601
6602static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6603 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6604 .rpc_call_done = nfs4_layoutcommit_done,
6605 .rpc_release = nfs4_layoutcommit_release,
6606};
6607
6608int
ef311537 6609nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6610{
6611 struct rpc_message msg = {
6612 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6613 .rpc_argp = &data->args,
6614 .rpc_resp = &data->res,
6615 .rpc_cred = data->cred,
6616 };
6617 struct rpc_task_setup task_setup_data = {
6618 .task = &data->task,
6619 .rpc_client = NFS_CLIENT(data->args.inode),
6620 .rpc_message = &msg,
6621 .callback_ops = &nfs4_layoutcommit_ops,
6622 .callback_data = data,
6623 .flags = RPC_TASK_ASYNC,
6624 };
6625 struct rpc_task *task;
6626 int status = 0;
6627
6628 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6629 "lbw: %llu inode %lu\n",
6630 data->task.tk_pid, sync,
6631 data->args.lastbytewritten,
6632 data->args.inode->i_ino);
6633
9d12b216 6634 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6635 task = rpc_run_task(&task_setup_data);
6636 if (IS_ERR(task))
6637 return PTR_ERR(task);
ef311537 6638 if (sync == false)
863a3c6c
AA		 6639 goto out;
6640 status = nfs4_wait_for_completion_rpc_task(task);
6641 if (status != 0)
6642 goto out;
6643 status = task->tk_status;
6644out:
6645 dprintk("%s: status %d\n", __func__, status);
6646 rpc_put_task(task);
6647 return status;
6648}
fca78d6d
BS		 6649
6650static int
6651_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6652 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6653{
6654 struct nfs41_secinfo_no_name_args args = {
6655 .style = SECINFO_STYLE_CURRENT_FH,
6656 };
6657 struct nfs4_secinfo_res res = {
6658 .flavors = flavors,
6659 };
6660 struct rpc_message msg = {
6661 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6662 .rpc_argp = &args,
6663 .rpc_resp = &res,
6664 };
6665 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6666}
6667
6668static int
6669nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6670 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6671{
6672 struct nfs4_exception exception = { };
6673 int err;
6674 do {
6675 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6676 switch (err) {
6677 case 0:
6678 case -NFS4ERR_WRONGSEC:
6679 case -NFS4ERR_NOTSUPP:
05e9cfb4 6680 goto out;
fca78d6d
BS		 6681 default:
6682 err = nfs4_handle_exception(server, err, &exception);
6683 }
6684 } while (exception.retry);
05e9cfb4 6685out:
fca78d6d
BS		 6686 return err;
6687}
6688
6689static int
6690nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6691 struct nfs_fsinfo *info)
6692{
6693 int err;
6694 struct page *page;
6695 rpc_authflavor_t flavor;
6696 struct nfs4_secinfo_flavors *flavors;
6697
6698 page = alloc_page(GFP_KERNEL);
6699 if (!page) {
6700 err = -ENOMEM;
6701 goto out;
6702 }
6703
6704 flavors = page_address(page);
6705 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6706
6707 /*
6708 * Fall back on "guess and check" method if
6709 * the server doesn't support SECINFO_NO_NAME
6710 */
6711 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6712 err = nfs4_find_root_sec(server, fhandle, info);
6713 goto out_freepage;
6714 }
6715 if (err)
6716 goto out_freepage;
6717
6718 flavor = nfs_find_best_sec(flavors);
6719 if (err == 0)
6720 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6721
6722out_freepage:
6723 put_page(page);
6724 if (err == -EACCES)
6725 return -EPERM;
6726out:
6727 return err;
6728}
1cab0652
BS		 6729
6730static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6731{
6732 int status;
6733 struct nfs41_test_stateid_args args = {
1cab0652 6734 .stateid = stateid,
7d974794
BS		 6735 };
6736 struct nfs41_test_stateid_res res;
6737 struct rpc_message msg = {
6738 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6739 .rpc_argp = &args,
6740 .rpc_resp = &res,
6741 };
1cab0652 6742
38527b15 6743 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6744 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6745 nfs4_set_sequence_privileged(&args.seq_args);
6746 status = nfs4_call_sync_sequence(server->client, server, &msg,
6747 &args.seq_args, &res.seq_res);
38527b15
CL		 6748 if (status != NFS_OK) {
6749 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6750 return status;
38527b15
CL		 6751 }
6752 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6753 return -res.status;
7d974794
BS		 6754}
6755
38527b15
CL		 6756/**
6757 * nfs41_test_stateid - perform a TEST_STATEID operation
6758 *
6759 * @server: server / transport on which to perform the operation
6760 * @stateid: state ID to test
6761 *
6762 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6763 * Otherwise a negative NFS4ERR value is returned if the operation
6764 * failed or the state ID is not currently valid.
6765 */
1cab0652 6766static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6767{
6768 struct nfs4_exception exception = { };
6769 int err;
6770 do {
377e507d
CL		 6771 err = _nfs41_test_stateid(server, stateid);
6772 if (err != -NFS4ERR_DELAY)
6773 break;
6774 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6775 } while (exception.retry);
6776 return err;
6777}
9aeda35f 6778
1cab0652 6779static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6780{
9aeda35f 6781 struct nfs41_free_stateid_args args = {
1cab0652 6782 .stateid = stateid,
9aeda35f
BS		 6783 };
6784 struct nfs41_free_stateid_res res;
6785 struct rpc_message msg = {
6786 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6787 .rpc_argp = &args,
6788 .rpc_resp = &res,
6789 };
38527b15 6790 int status;
9aeda35f 6791
38527b15 6792 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6793 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 6794 nfs4_set_sequence_privileged(&args.seq_args);
38527b15 6795 status = nfs4_call_sync_sequence(server->client, server, &msg,
8fe72bac 6796 &args.seq_args, &res.seq_res);
38527b15
CL		 6797 dprintk("NFS reply free_stateid: %d\n", status);
6798 return status;
9aeda35f
BS		 6799}
6800
38527b15
CL		 6801/**
6802 * nfs41_free_stateid - perform a FREE_STATEID operation
6803 *
6804 * @server: server / transport on which to perform the operation
6805 * @stateid: state ID to release
6806 *
6807 * Returns NFS_OK if the server freed "stateid". Otherwise a
6808 * negative NFS4ERR value is returned.
6809 */
1cab0652 6810static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6811{
6812 struct nfs4_exception exception = { };
6813 int err;
6814 do {
377e507d
CL		 6815 err = _nfs4_free_stateid(server, stateid);
6816 if (err != -NFS4ERR_DELAY)
6817 break;
6818 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6819 } while (exception.retry);
6820 return err;
6821}
36281caa
TM		 6822
6823static bool nfs41_match_stateid(const nfs4_stateid *s1,
6824 const nfs4_stateid *s2)
6825{
2d2f24ad 6826 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6827 return false;
6828
2d2f24ad 6829 if (s1->seqid == s2->seqid)
36281caa 6830 return true;
2d2f24ad 6831 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6832 return true;
6833
6834 return false;
6835}
6836
557134a3
AA		 6837#endif /* CONFIG_NFS_V4_1 */
6838
36281caa
TM		 6839static bool nfs4_match_stateid(const nfs4_stateid *s1,
6840 const nfs4_stateid *s2)
6841{
f597c537 6842 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6843}
6844
6845
17280175 6846static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6847 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6848 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6849 .recover_open = nfs4_open_reclaim,
6850 .recover_lock = nfs4_lock_reclaim,
591d71cb 6851 .establish_clid = nfs4_init_clientid,
90a16617 6852 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6853 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6854};
6855
591d71cb 6856#if defined(CONFIG_NFS_V4_1)
17280175 6857static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6858 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6859 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6860 .recover_open = nfs4_open_reclaim,
6861 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6862 .establish_clid = nfs41_init_clientid,
b4b82607 6863 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6864 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6865 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6866};
6867#endif /* CONFIG_NFS_V4_1 */
6868
17280175 6869static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6870 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6871 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6872 .recover_open = nfs4_open_expired,
6873 .recover_lock = nfs4_lock_expired,
6874 .establish_clid = nfs4_init_clientid,
90a16617 6875 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6876};
6877
6878#if defined(CONFIG_NFS_V4_1)
17280175 6879static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6880 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6881 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6882 .recover_open = nfs41_open_expired,
6883 .recover_lock = nfs41_lock_expired,
4d643d1d 6884 .establish_clid = nfs41_init_clientid,
b4b82607 6885 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6886};
591d71cb 6887#endif /* CONFIG_NFS_V4_1 */
1da177e4 6888
17280175 6889static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6890 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6891 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6892 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6893};
6894
6895#if defined(CONFIG_NFS_V4_1)
17280175 6896static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6897 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6898 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6899 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6900};
6901#endif
6902
97dc1359
TM		 6903static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6904 .minor_version = 0,
39c6daae
TM		 6905 .init_caps = NFS_CAP_READDIRPLUS
6906 | NFS_CAP_ATOMIC_OPEN
6907 | NFS_CAP_CHANGE_ATTR
6908 | NFS_CAP_POSIX_LOCK,
97dc1359 6909 .call_sync = _nfs4_call_sync,
36281caa 6910 .match_stateid = nfs4_match_stateid,
fca78d6d 6911 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6912 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6913 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6914 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6915};
6916
6917#if defined(CONFIG_NFS_V4_1)
6918static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6919 .minor_version = 1,
39c6daae
TM		 6920 .init_caps = NFS_CAP_READDIRPLUS
6921 | NFS_CAP_ATOMIC_OPEN
6922 | NFS_CAP_CHANGE_ATTR
3b66486c 6923 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 6924 | NFS_CAP_STATEID_NFSV41
6925 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 6926 .call_sync = nfs4_call_sync_sequence,
36281caa 6927 .match_stateid = nfs41_match_stateid,
fca78d6d 6928 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6929 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6930 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6931 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6932};
6933#endif
6934
97dc1359
TM		 6935const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6936 [0] = &nfs_v4_0_minor_ops,
6937#if defined(CONFIG_NFS_V4_1)
6938 [1] = &nfs_v4_1_minor_ops,
6939#endif
6940};
6941
73a79706
BS		 6942const struct inode_operations nfs4_dir_inode_operations = {
6943 .create = nfs_create,
6944 .lookup = nfs_lookup,
6945 .atomic_open = nfs_atomic_open,
6946 .link = nfs_link,
6947 .unlink = nfs_unlink,
6948 .symlink = nfs_symlink,
6949 .mkdir = nfs_mkdir,
6950 .rmdir = nfs_rmdir,
6951 .mknod = nfs_mknod,
6952 .rename = nfs_rename,
6953 .permission = nfs_permission,
6954 .getattr = nfs_getattr,
6955 .setattr = nfs_setattr,
6956 .getxattr = generic_getxattr,
6957 .setxattr = generic_setxattr,
6958 .listxattr = generic_listxattr,
6959 .removexattr = generic_removexattr,
6960};
6961
92e1d5be 6962static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6963 .permission = nfs_permission,
6964 .getattr = nfs_getattr,
6965 .setattr = nfs_setattr,
64c2ce8b
AK		 6966 .getxattr = generic_getxattr,
6967 .setxattr = generic_setxattr,
6968 .listxattr = generic_listxattr,
6969 .removexattr = generic_removexattr,
6b3b5496
BF		 6970};
6971
509de811 6972const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6973 .version = 4, /* protocol version */
6974 .dentry_ops = &nfs4_dentry_operations,
6975 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6976 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6977 .file_ops = &nfs4_file_operations,
1da177e4 6978 .getroot = nfs4_proc_get_root,
281cad46 6979 .submount = nfs4_submount,
ff9099f2 6980 .try_mount = nfs4_try_mount,
1da177e4
LT		 6981 .getattr = nfs4_proc_getattr,
6982 .setattr = nfs4_proc_setattr,
6983 .lookup = nfs4_proc_lookup,
6984 .access = nfs4_proc_access,
6985 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6986 .create = nfs4_proc_create,
6987 .remove = nfs4_proc_remove,
6988 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6989 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6990 .unlink_done = nfs4_proc_unlink_done,
6991 .rename = nfs4_proc_rename,
d3d4152a 6992 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6993 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6994 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6995 .link = nfs4_proc_link,
6996 .symlink = nfs4_proc_symlink,
6997 .mkdir = nfs4_proc_mkdir,
6998 .rmdir = nfs4_proc_remove,
6999 .readdir = nfs4_proc_readdir,
7000 .mknod = nfs4_proc_mknod,
7001 .statfs = nfs4_proc_statfs,
7002 .fsinfo = nfs4_proc_fsinfo,
7003 .pathconf = nfs4_proc_pathconf,
e9326dca 7004 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7005 .decode_dirent = nfs4_decode_dirent,
7006 .read_setup = nfs4_proc_read_setup,
1abb5088 7007 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7008 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7009 .read_done = nfs4_read_done,
1da177e4 7010 .write_setup = nfs4_proc_write_setup,
57208fa7 7011 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7012 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7013 .write_done = nfs4_write_done,
1da177e4 7014 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7015 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7016 .commit_done = nfs4_commit_done,
1da177e4 7017 .lock = nfs4_proc_lock,
e50a1c2e 7018 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 7019 .close_context = nfs4_close_context,
2b484297 7020 .open_context = nfs4_atomic_open,
011e2a7f 7021 .have_delegation = nfs4_have_delegation,
57ec14c5 7022 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 7023 .alloc_client = nfs4_alloc_client,
45a52a02 7024 .init_client = nfs4_init_client,
cdb7eced 7025 .free_client = nfs4_free_client,
1179acc6
BS		 7026 .create_server = nfs4_create_server,
7027 .clone_server = nfs_clone_server,
1da177e4
LT		 7028};
7029
64c2ce8b
AK		 7030static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
7031 .prefix = XATTR_NAME_NFSV4_ACL,
7032 .list = nfs4_xattr_list_nfs4_acl,
7033 .get = nfs4_xattr_get_nfs4_acl,
7034 .set = nfs4_xattr_set_nfs4_acl,
7035};
7036
7037const struct xattr_handler *nfs4_xattr_handlers[] = {
7038 &nfs4_xattr_nfs4_acl_handler,
7039 NULL
7040};
7041
1da177e4
LT		 7042/*
7043 * Local variables:
7044 * c-basic-offset: 8
7045 * End:
7046 */
Linux 6.x block layer and io_uring tree(s)