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NFSv4.1: Don't do a delegated open for NFS4_OPEN_CLAIM_DELEG_CUR_FH modes
[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;
24ac23ab
TM		 772 int rpc_status;
773 int cancelled;
e56e0b78
TM		 774};
775
49f9a0fa
TM		 776static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
777 int err, struct nfs4_exception *exception)
778{
779 if (err != -EINVAL)
780 return false;
781 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
782 return false;
783 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
784 exception->retry = 1;
785 return true;
786}
787
788static enum open_claim_type4
789nfs4_map_atomic_open_claim(struct nfs_server *server,
790 enum open_claim_type4 claim)
791{
792 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
793 return claim;
794 switch (claim) {
795 default:
796 return claim;
797 case NFS4_OPEN_CLAIM_FH:
798 return NFS4_OPEN_CLAIM_NULL;
799 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
800 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
801 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
802 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
803 }
804}
2ced46c2
TM		 805
806static void nfs4_init_opendata_res(struct nfs4_opendata *p)
807{
808 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 809 p->o_res.seqid = p->o_arg.seqid;
810 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 811 p->o_res.server = p->o_arg.server;
5f657530 812 p->o_res.access_request = p->o_arg.access;
2ced46c2 813 nfs_fattr_init(&p->f_attr);
6926afd1 814 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 815}
816
82a2c1b7 817static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 818 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 819 const struct iattr *attrs,
4a1c0893 820 enum open_claim_type4 claim,
8535b2be 821 gfp_t gfp_mask)
e56e0b78 822{
82a2c1b7 823 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 824 struct inode *dir = parent->d_inode;
825 struct nfs_server *server = NFS_SERVER(dir);
826 struct nfs4_opendata *p;
827
8535b2be 828 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 829 if (p == NULL)
830 goto err;
8535b2be 831 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 832 if (p->o_arg.seqid == NULL)
833 goto err_free;
82a2c1b7
AV		 834 nfs_sb_active(dentry->d_sb);
835 p->dentry = dget(dentry);
e56e0b78
TM		 836 p->dir = parent;
837 p->owner = sp;
838 atomic_inc(&sp->so_count);
dc0b027d
TM		 839 p->o_arg.open_flags = flags;
840 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 841 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
842 * will return permission denied for all bits until close */
843 if (!(flags & O_EXCL)) {
844 /* ask server to check for all possible rights as results
845 * are cached */
846 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
847 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 848 }
7539bbab 849 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 850 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
851 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 852 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 853 p->o_arg.server = server;
854 p->o_arg.bitmask = server->attr_bitmask;
1549210f 855 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
49f9a0fa
TM		 856 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
857 switch (p->o_arg.claim) {
4a1c0893
TM		 858 case NFS4_OPEN_CLAIM_NULL:
859 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
860 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
861 p->o_arg.fh = NFS_FH(dir);
862 break;
863 case NFS4_OPEN_CLAIM_PREVIOUS:
864 case NFS4_OPEN_CLAIM_FH:
865 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
866 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
867 p->o_arg.fh = NFS_FH(dentry->d_inode);
868 }
536e43d1 869 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 870 __be32 verf[2];
d77d76ff 871
e56e0b78
TM		 872 p->o_arg.u.attrs = &p->attrs;
873 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 874
875 verf[0] = jiffies;
876 verf[1] = current->pid;
877 memcpy(p->o_arg.u.verifier.data, verf,
878 sizeof(p->o_arg.u.verifier.data));
e56e0b78 879 }
cdd4e68b
TM		 880 p->c_arg.fh = &p->o_res.fh;
881 p->c_arg.stateid = &p->o_res.stateid;
882 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 883 nfs4_init_opendata_res(p);
c6d00e63 884 kref_init(&p->kref);
e56e0b78
TM		 885 return p;
886err_free:
887 kfree(p);
888err:
889 dput(parent);
890 return NULL;
891}
892
c6d00e63 893static void nfs4_opendata_free(struct kref *kref)
e56e0b78 894{
c6d00e63
TM		 895 struct nfs4_opendata *p = container_of(kref,
896 struct nfs4_opendata, kref);
82a2c1b7 897 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 898
899 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 900 if (p->state != NULL)
901 nfs4_put_open_state(p->state);
c6d00e63
TM		 902 nfs4_put_state_owner(p->owner);
903 dput(p->dir);
82a2c1b7
AV		 904 dput(p->dentry);
905 nfs_sb_deactive(sb);
6926afd1 906 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 907 kfree(p);
908}
909
910static void nfs4_opendata_put(struct nfs4_opendata *p)
911{
912 if (p != NULL)
913 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 914}
915
06f814a3
TM		 916static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
917{
06f814a3
TM		 918 int ret;
919
06f814a3 920 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 921 return ret;
922}
923
dc0b027d 924static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 925{
926 int ret = 0;
dc0b027d 927
536e43d1 928 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 929 goto out;
930 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 931 case FMODE_READ:
88069f77
TM		 932 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
933 && state->n_rdonly != 0;
6ee41268
TM		 934 break;
935 case FMODE_WRITE:
88069f77
TM		 936 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
937 && state->n_wronly != 0;
6ee41268
TM		 938 break;
939 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 940 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
941 && state->n_rdwr != 0;
6ee41268 942 }
dc0b027d 943out:
6ee41268
TM		 944 return ret;
945}
946
dc0b027d 947static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 948{
652f89f6
TM		 949 if (delegation == NULL)
950 return 0;
dc0b027d 951 if ((delegation->type & fmode) != fmode)
aac00a8d 952 return 0;
15c831bf 953 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 954 return 0;
d25be546
TM		 955 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
956 return 0;
b7391f44 957 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 958 return 1;
959}
960
dc0b027d 961static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 962{
dc0b027d 963 switch (fmode) {
e7616923
TM		 964 case FMODE_WRITE:
965 state->n_wronly++;
966 break;
967 case FMODE_READ:
968 state->n_rdonly++;
969 break;
970 case FMODE_READ|FMODE_WRITE:
971 state->n_rdwr++;
972 }
dc0b027d 973 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 974}
975
dc0b027d 976static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 977{
978 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 979 nfs4_stateid_copy(&state->stateid, stateid);
980 nfs4_stateid_copy(&state->open_stateid, stateid);
92b40e93 981 set_bit(NFS_OPEN_STATE, &state->flags);
dc0b027d 982 switch (fmode) {
003707c7
TM		 983 case FMODE_READ:
984 set_bit(NFS_O_RDONLY_STATE, &state->flags);
985 break;
986 case FMODE_WRITE:
987 set_bit(NFS_O_WRONLY_STATE, &state->flags);
988 break;
989 case FMODE_READ|FMODE_WRITE:
990 set_bit(NFS_O_RDWR_STATE, &state->flags);
991 }
e7616923
TM		 992}
993
dc0b027d 994static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 995{
8bda4e4c 996 write_seqlock(&state->seqlock);
dc0b027d 997 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 998 write_sequnlock(&state->seqlock);
003707c7
TM		 999}
1000
dc0b027d 1001static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1002{
8bda4e4c
TM		 1003 /*
1004 * Protect the call to nfs4_state_set_mode_locked and
1005 * serialise the stateid update
1006 */
1007 write_seqlock(&state->seqlock);
003707c7 1008 if (deleg_stateid != NULL) {
f597c537 1009 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1010 set_bit(NFS_DELEGATED_STATE, &state->flags);
1011 }
1012 if (open_stateid != NULL)
dc0b027d 1013 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1014 write_sequnlock(&state->seqlock);
1015 spin_lock(&state->owner->so_lock);
dc0b027d 1016 update_open_stateflags(state, fmode);
ec073428 1017 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1018}
1019
dc0b027d 1020static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1021{
1022 struct nfs_inode *nfsi = NFS_I(state->inode);
1023 struct nfs_delegation *deleg_cur;
1024 int ret = 0;
1025
dc0b027d 1026 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1027
1028 rcu_read_lock();
1029 deleg_cur = rcu_dereference(nfsi->delegation);
1030 if (deleg_cur == NULL)
1031 goto no_delegation;
1032
1033 spin_lock(&deleg_cur->lock);
1034 if (nfsi->delegation != deleg_cur ||
d25be546 1035 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1036 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1037 goto no_delegation_unlock;
1038
1039 if (delegation == NULL)
1040 delegation = &deleg_cur->stateid;
f597c537 1041 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1042 goto no_delegation_unlock;
1043
b7391f44 1044 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1045 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1046 ret = 1;
1047no_delegation_unlock:
1048 spin_unlock(&deleg_cur->lock);
1049no_delegation:
1050 rcu_read_unlock();
1051
1052 if (!ret && open_stateid != NULL) {
dc0b027d 1053 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1054 ret = 1;
1055 }
1056
1057 return ret;
1058}
1059
1060
dc0b027d 1061static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1062{
1063 struct nfs_delegation *delegation;
1064
1065 rcu_read_lock();
1066 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1067 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1068 rcu_read_unlock();
1069 return;
1070 }
1071 rcu_read_unlock();
57ec14c5 1072 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1073}
1074
6ee41268 1075static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1076{
1077 struct nfs4_state *state = opendata->state;
1078 struct nfs_inode *nfsi = NFS_I(state->inode);
1079 struct nfs_delegation *delegation;
536e43d1 1080 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1081 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1082 nfs4_stateid stateid;
1083 int ret = -EAGAIN;
1084
aac00a8d 1085 for (;;) {
dc0b027d 1086 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1087 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1088 if (can_open_cached(state, fmode, open_mode)) {
1089 update_open_stateflags(state, fmode);
6ee41268 1090 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1091 goto out_return_state;
1092 }
1093 spin_unlock(&state->owner->so_lock);
1094 }
34310430
TM		 1095 rcu_read_lock();
1096 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1097 if (!can_open_delegated(delegation, fmode)) {
34310430 1098 rcu_read_unlock();
aac00a8d 1099 break;
34310430 1100 }
aac00a8d 1101 /* Save the delegation */
f597c537 1102 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1103 rcu_read_unlock();
af22f94a 1104 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1105 if (ret != 0)
1106 goto out;
1107 ret = -EAGAIN;
34310430
TM		 1108
1109 /* Try to update the stateid using the delegation */
dc0b027d 1110 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1111 goto out_return_state;
aac00a8d 1112 }
aac00a8d
TM		 1113out:
1114 return ERR_PTR(ret);
1115out_return_state:
1116 atomic_inc(&state->count);
1117 return state;
1118}
1119
e23008ec
AA		 1120static void
1121nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1122{
1123 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1124 struct nfs_delegation *delegation;
1125 int delegation_flags = 0;
1126
1127 rcu_read_lock();
1128 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1129 if (delegation)
1130 delegation_flags = delegation->flags;
1131 rcu_read_unlock();
1132 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1133 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1134 "returning a delegation for "
1135 "OPEN(CLAIM_DELEGATE_CUR)\n",
1136 clp->cl_hostname);
1137 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1138 nfs_inode_set_delegation(state->inode,
1139 data->owner->so_cred,
1140 &data->o_res);
1141 else
1142 nfs_inode_reclaim_delegation(state->inode,
1143 data->owner->so_cred,
1144 &data->o_res);
1145}
1146
1147/*
1148 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1149 * and update the nfs4_state.
1150 */
1151static struct nfs4_state *
1152_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1153{
1154 struct inode *inode = data->state->inode;
1155 struct nfs4_state *state = data->state;
1156 int ret;
1157
1158 if (!data->rpc_done) {
1159 ret = data->rpc_status;
1160 goto err;
1161 }
1162
1163 ret = -ESTALE;
1164 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1165 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1166 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1167 goto err;
1168
1169 ret = -ENOMEM;
1170 state = nfs4_get_open_state(inode, data->owner);
1171 if (state == NULL)
1172 goto err;
1173
1174 ret = nfs_refresh_inode(inode, &data->f_attr);
1175 if (ret)
1176 goto err;
1177
1178 if (data->o_res.delegation_type != 0)
1179 nfs4_opendata_check_deleg(data, state);
1180 update_open_stateid(state, &data->o_res.stateid, NULL,
1181 data->o_arg.fmode);
1182
1183 return state;
1184err:
1185 return ERR_PTR(ret);
1186
1187}
1188
1189static struct nfs4_state *
1190_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1191{
1192 struct inode *inode;
1193 struct nfs4_state *state = NULL;
1b370bc2 1194 int ret;
24ac23ab 1195
aac00a8d 1196 if (!data->rpc_done) {
6ee41268 1197 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1198 goto out;
1199 }
1200
1b370bc2 1201 ret = -EAGAIN;
24ac23ab 1202 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1203 goto err;
24ac23ab 1204 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1205 ret = PTR_ERR(inode);
03f28e3a 1206 if (IS_ERR(inode))
1b370bc2
TM		 1207 goto err;
1208 ret = -ENOMEM;
24ac23ab
TM		 1209 state = nfs4_get_open_state(inode, data->owner);
1210 if (state == NULL)
1b370bc2 1211 goto err_put_inode;
e23008ec
AA		 1212 if (data->o_res.delegation_type != 0)
1213 nfs4_opendata_check_deleg(data, state);
34310430 1214 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1215 data->o_arg.fmode);
24ac23ab 1216 iput(inode);
aac00a8d 1217out:
7aa262b5 1218 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1219 return state;
1b370bc2
TM		 1220err_put_inode:
1221 iput(inode);
1222err:
1223 return ERR_PTR(ret);
24ac23ab
TM		 1224}
1225
e23008ec
AA		 1226static struct nfs4_state *
1227nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1228{
1229 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1230 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1231 return _nfs4_opendata_to_nfs4_state(data);
1232}
1233
864472e9
TM		 1234static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1235{
1236 struct nfs_inode *nfsi = NFS_I(state->inode);
1237 struct nfs_open_context *ctx;
1238
1239 spin_lock(&state->inode->i_lock);
1240 list_for_each_entry(ctx, &nfsi->open_files, list) {
1241 if (ctx->state != state)
1242 continue;
1243 get_nfs_open_context(ctx);
1244 spin_unlock(&state->inode->i_lock);
1245 return ctx;
1246 }
1247 spin_unlock(&state->inode->i_lock);
1248 return ERR_PTR(-ENOENT);
1249}
1250
4a1c0893
TM		 1251static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1252 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1253{
1254 struct nfs4_opendata *opendata;
1255
4a1c0893
TM		 1256 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1257 NULL, claim, GFP_NOFS);
6f220ed5
TM		 1258 if (opendata == NULL)
1259 return ERR_PTR(-ENOMEM);
1260 opendata->state = state;
1261 atomic_inc(&state->count);
1262 return opendata;
1263}
1264
dc0b027d 1265static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1266{
2ced46c2 1267 struct nfs4_state *newstate;
864472e9
TM		 1268 int ret;
1269
dc0b027d
TM		 1270 opendata->o_arg.open_flags = 0;
1271 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1272 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1273 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1274 nfs4_init_opendata_res(opendata);
b257957e 1275 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1276 if (ret != 0)
1277 return ret;
2ced46c2 1278 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1279 if (IS_ERR(newstate))
1280 return PTR_ERR(newstate);
643168c2 1281 nfs4_close_state(newstate, fmode);
2ced46c2 1282 *res = newstate;
864472e9
TM		 1283 return 0;
1284}
1285
1286static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1287{
864472e9 1288 struct nfs4_state *newstate;
864472e9
TM		 1289 int ret;
1290
1291 /* memory barrier prior to reading state->n_* */
2ced46c2 1292 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1293 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1294 smp_rmb();
1295 if (state->n_rdwr != 0) {
b0ed9dbc 1296 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1297 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1298 if (ret != 0)
1299 return ret;
2ced46c2
TM		 1300 if (newstate != state)
1301 return -ESTALE;
864472e9
TM		 1302 }
1303 if (state->n_wronly != 0) {
b0ed9dbc 1304 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1305 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1306 if (ret != 0)
1307 return ret;
2ced46c2
TM		 1308 if (newstate != state)
1309 return -ESTALE;
864472e9
TM		 1310 }
1311 if (state->n_rdonly != 0) {
b0ed9dbc 1312 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1313 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1314 if (ret != 0)
1315 return ret;
2ced46c2
TM		 1316 if (newstate != state)
1317 return -ESTALE;
864472e9 1318 }
1ac7e2fd
TM		 1319 /*
1320 * We may have performed cached opens for all three recoveries.
1321 * Check if we need to update the current stateid.
1322 */
1323 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1324 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1325 write_seqlock(&state->seqlock);
1ac7e2fd 1326 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1327 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1328 write_sequnlock(&state->seqlock);
1ac7e2fd 1329 }
864472e9
TM		 1330 return 0;
1331}
1332
1da177e4
LT		 1333/*
1334 * OPEN_RECLAIM:
1335 * reclaim state on the server after a reboot.
1da177e4 1336 */
539cd03a 1337static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1338{
1ac7e2fd 1339 struct nfs_delegation *delegation;
864472e9 1340 struct nfs4_opendata *opendata;
dc0b027d 1341 fmode_t delegation_type = 0;
1da177e4
LT		 1342 int status;
1343
4a1c0893
TM		 1344 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1345 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1346 if (IS_ERR(opendata))
1347 return PTR_ERR(opendata);
1ac7e2fd
TM		 1348 rcu_read_lock();
1349 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1350 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1351 delegation_type = delegation->type;
1ac7e2fd 1352 rcu_read_unlock();
864472e9
TM		 1353 opendata->o_arg.u.delegation_type = delegation_type;
1354 status = nfs4_open_recover(opendata, state);
c6d00e63 1355 nfs4_opendata_put(opendata);
1da177e4
LT		 1356 return status;
1357}
1358
539cd03a 1359static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1360{
1361 struct nfs_server *server = NFS_SERVER(state->inode);
1362 struct nfs4_exception exception = { };
1363 int err;
1364 do {
539cd03a 1365 err = _nfs4_do_open_reclaim(ctx, state);
49f9a0fa
TM		 1366 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1367 continue;
168667c4 1368 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1369 break;
1370 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1371 } while (exception.retry);
1372 return err;
1373}
1374
864472e9
TM		 1375static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1376{
1377 struct nfs_open_context *ctx;
1378 int ret;
1379
1380 ctx = nfs4_state_find_open_context(state);
1381 if (IS_ERR(ctx))
91876b13 1382 return -EAGAIN;
539cd03a 1383 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1384 put_nfs_open_context(ctx);
1385 return ret;
1386}
1387
db4f2e63 1388static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1389{
be76b5b6
TM		 1390 switch (err) {
1391 default:
1392 printk(KERN_ERR "NFS: %s: unhandled error "
1393 "%d.\n", __func__, err);
1394 case 0:
1395 case -ENOENT:
1396 case -ESTALE:
1397 break;
1398 case -NFS4ERR_BADSESSION:
1399 case -NFS4ERR_BADSLOT:
1400 case -NFS4ERR_BAD_HIGH_SLOT:
1401 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1402 case -NFS4ERR_DEADSESSION:
1403 set_bit(NFS_DELEGATED_STATE, &state->flags);
1404 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1405 return -EAGAIN;
1406 case -NFS4ERR_STALE_CLIENTID:
1407 case -NFS4ERR_STALE_STATEID:
1408 set_bit(NFS_DELEGATED_STATE, &state->flags);
1409 case -NFS4ERR_EXPIRED:
1410 /* Don't recall a delegation if it was lost */
1411 nfs4_schedule_lease_recovery(server->nfs_client);
1412 return -EAGAIN;
1413 case -NFS4ERR_DELEG_REVOKED:
1414 case -NFS4ERR_ADMIN_REVOKED:
1415 case -NFS4ERR_BAD_STATEID:
db4f2e63 1416 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1417 nfs_inode_find_state_and_recover(state->inode,
1418 stateid);
1419 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1420 return 0;
1421 case -NFS4ERR_DELAY:
1422 case -NFS4ERR_GRACE:
1423 set_bit(NFS_DELEGATED_STATE, &state->flags);
1424 ssleep(1);
1425 return -EAGAIN;
db4f2e63
TM		 1426 case -ENOMEM:
1427 case -NFS4ERR_DENIED:
1428 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1429 return 0;
be76b5b6 1430 }
1da177e4
LT		 1431 return err;
1432}
1433
db4f2e63
TM		 1434int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1435{
1436 struct nfs_server *server = NFS_SERVER(state->inode);
1437 struct nfs4_opendata *opendata;
1438 int err;
1439
1440 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1441 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1442 if (IS_ERR(opendata))
1443 return PTR_ERR(opendata);
1444 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1445 err = nfs4_open_recover(opendata, state);
1446 nfs4_opendata_put(opendata);
1447 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1448}
1449
cdd4e68b
TM		 1450static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1451{
1452 struct nfs4_opendata *data = calldata;
1453
1454 data->rpc_status = task->tk_status;
26e976a8 1455 if (data->rpc_status == 0) {
f597c537 1456 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1457 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1458 renew_lease(data->o_res.server, data->timestamp);
3e309914 1459 data->rpc_done = 1;
26e976a8 1460 }
cdd4e68b
TM		 1461}
1462
1463static void nfs4_open_confirm_release(void *calldata)
1464{
1465 struct nfs4_opendata *data = calldata;
1466 struct nfs4_state *state = NULL;
1467
1468 /* If this request hasn't been cancelled, do nothing */
1469 if (data->cancelled == 0)
1470 goto out_free;
1471 /* In case of error, no cleanup! */
3e309914 1472 if (!data->rpc_done)
cdd4e68b 1473 goto out_free;
cdd4e68b 1474 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1475 if (!IS_ERR(state))
643168c2 1476 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1477out_free:
c6d00e63 1478 nfs4_opendata_put(data);
cdd4e68b
TM		 1479}
1480
1481static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1482 .rpc_call_done = nfs4_open_confirm_done,
1483 .rpc_release = nfs4_open_confirm_release,
1484};
1485
1486/*
1487 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1488 */
1489static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1490{
1491 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1492 struct rpc_task *task;
5138fde0
TM		 1493 struct rpc_message msg = {
1494 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1495 .rpc_argp = &data->c_arg,
1496 .rpc_resp = &data->c_res,
1497 .rpc_cred = data->owner->so_cred,
1498 };
c970aa85
TM		 1499 struct rpc_task_setup task_setup_data = {
1500 .rpc_client = server->client,
5138fde0 1501 .rpc_message = &msg,
c970aa85
TM		 1502 .callback_ops = &nfs4_open_confirm_ops,
1503 .callback_data = data,
101070ca 1504 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1505 .flags = RPC_TASK_ASYNC,
1506 };
1da177e4
LT		 1507 int status;
1508
c6d00e63 1509 kref_get(&data->kref);
3e309914
TM		 1510 data->rpc_done = 0;
1511 data->rpc_status = 0;
5138fde0 1512 data->timestamp = jiffies;
c970aa85 1513 task = rpc_run_task(&task_setup_data);
7a1218a2 1514 if (IS_ERR(task))
cdd4e68b 1515 return PTR_ERR(task);
cdd4e68b
TM		 1516 status = nfs4_wait_for_completion_rpc_task(task);
1517 if (status != 0) {
1518 data->cancelled = 1;
1519 smp_wmb();
1520 } else
1521 status = data->rpc_status;
e6b3c4db 1522 rpc_put_task(task);
1da177e4
LT		 1523 return status;
1524}
1525
24ac23ab 1526static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1527{
24ac23ab
TM		 1528 struct nfs4_opendata *data = calldata;
1529 struct nfs4_state_owner *sp = data->owner;
549b19cc 1530 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1531
24ac23ab 1532 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1533 goto out_wait;
aac00a8d
TM		 1534 /*
1535 * Check if we still need to send an OPEN call, or if we can use
1536 * a delegation instead.
1537 */
1538 if (data->state != NULL) {
1539 struct nfs_delegation *delegation;
1540
dc0b027d 1541 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1542 goto out_no_action;
aac00a8d
TM		 1543 rcu_read_lock();
1544 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1545 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1546 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1547 can_open_delegated(delegation, data->o_arg.fmode))
1548 goto unlock_no_action;
aac00a8d
TM		 1549 rcu_read_unlock();
1550 }
95b72eb0 1551 /* Update client id. */
549b19cc 1552 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1553 switch (data->o_arg.claim) {
1554 case NFS4_OPEN_CLAIM_PREVIOUS:
1555 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1556 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1557 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1558 case NFS4_OPEN_CLAIM_FH:
1559 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1560 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1561 }
26e976a8 1562 data->timestamp = jiffies;
035168ab 1563 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1564 &data->o_arg.seq_args,
2240a9e2
TM		 1565 &data->o_res.seq_res,
1566 task) != 0)
1567 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1568
1569 /* Set the create mode (note dependency on the session type) */
1570 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1571 if (data->o_arg.open_flags & O_EXCL) {
1572 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1573 if (nfs4_has_persistent_session(clp))
1574 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1575 else if (clp->cl_mvops->minor_version > 0)
1576 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1577 }
6ee41268 1578 return;
652f89f6
TM		 1579unlock_no_action:
1580 rcu_read_unlock();
6ee41268
TM		 1581out_no_action:
1582 task->tk_action = NULL;
c8da19b9 1583out_wait:
b75ad4cd 1584 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1585}
1586
24ac23ab
TM		 1587static void nfs4_open_done(struct rpc_task *task, void *calldata)
1588{
1589 struct nfs4_opendata *data = calldata;
1da177e4 1590
24ac23ab 1591 data->rpc_status = task->tk_status;
d898528c 1592
14516c3a
TM		 1593 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1594 return;
d898528c 1595
24ac23ab 1596 if (task->tk_status == 0) {
807d66d8
TM		 1597 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1598 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1599 case S_IFREG:
1600 break;
1601 case S_IFLNK:
24ac23ab 1602 data->rpc_status = -ELOOP;
6f926b5b
TM		 1603 break;
1604 case S_IFDIR:
24ac23ab 1605 data->rpc_status = -EISDIR;
6f926b5b
TM		 1606 break;
1607 default:
24ac23ab 1608 data->rpc_status = -ENOTDIR;
807d66d8 1609 }
6f926b5b 1610 }
26e976a8 1611 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1612 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1613 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1614 }
3e309914 1615 data->rpc_done = 1;
24ac23ab 1616}
6f926b5b 1617
24ac23ab
TM		 1618static void nfs4_open_release(void *calldata)
1619{
1620 struct nfs4_opendata *data = calldata;
1621 struct nfs4_state *state = NULL;
1622
1623 /* If this request hasn't been cancelled, do nothing */
1624 if (data->cancelled == 0)
1625 goto out_free;
1626 /* In case of error, no cleanup! */
3e309914 1627 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1628 goto out_free;
1629 /* In case we need an open_confirm, no cleanup! */
1630 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1631 goto out_free;
24ac23ab 1632 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1633 if (!IS_ERR(state))
643168c2 1634 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1635out_free:
c6d00e63 1636 nfs4_opendata_put(data);
24ac23ab
TM		 1637}
1638
1639static const struct rpc_call_ops nfs4_open_ops = {
1640 .rpc_call_prepare = nfs4_open_prepare,
1641 .rpc_call_done = nfs4_open_done,
1642 .rpc_release = nfs4_open_release,
1643};
1644
b257957e 1645static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1646{
1647 struct inode *dir = data->dir->d_inode;
1648 struct nfs_server *server = NFS_SERVER(dir);
1649 struct nfs_openargs *o_arg = &data->o_arg;
1650 struct nfs_openres *o_res = &data->o_res;
1651 struct rpc_task *task;
5138fde0
TM		 1652 struct rpc_message msg = {
1653 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1654 .rpc_argp = o_arg,
1655 .rpc_resp = o_res,
1656 .rpc_cred = data->owner->so_cred,
1657 };
c970aa85
TM		 1658 struct rpc_task_setup task_setup_data = {
1659 .rpc_client = server->client,
5138fde0 1660 .rpc_message = &msg,
c970aa85
TM		 1661 .callback_ops = &nfs4_open_ops,
1662 .callback_data = data,
101070ca 1663 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1664 .flags = RPC_TASK_ASYNC,
1665 };
24ac23ab
TM		 1666 int status;
1667
9d12b216 1668 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1669 kref_get(&data->kref);
3e309914
TM		 1670 data->rpc_done = 0;
1671 data->rpc_status = 0;
2ced46c2 1672 data->cancelled = 0;
b257957e 1673 if (isrecover)
8fe72bac 1674 nfs4_set_sequence_privileged(&o_arg->seq_args);
c970aa85 1675 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1676 if (IS_ERR(task))
1677 return PTR_ERR(task);
1678 status = nfs4_wait_for_completion_rpc_task(task);
1679 if (status != 0) {
1680 data->cancelled = 1;
1681 smp_wmb();
1682 } else
1683 status = data->rpc_status;
1684 rpc_put_task(task);
1685
1686 return status;
1687}
1688
1689static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1690{
1691 struct inode *dir = data->dir->d_inode;
1692 struct nfs_openres *o_res = &data->o_res;
1693 int status;
1694
1695 status = nfs4_run_open_task(data, 1);
1696 if (status != 0 || !data->rpc_done)
1697 return status;
1698
6926afd1
TM		 1699 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1700
b257957e
AB		 1701 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1702 status = _nfs4_proc_open_confirm(data);
1703 if (status != 0)
1704 return status;
1705 }
1706
1707 return status;
1708}
1709
6168f62c
WAA		 1710static int nfs4_opendata_access(struct rpc_cred *cred,
1711 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1712 struct nfs4_state *state, fmode_t fmode,
1713 int openflags)
6168f62c
WAA		 1714{
1715 struct nfs_access_entry cache;
1716 u32 mask;
1717
1718 /* access call failed or for some reason the server doesn't
1719 * support any access modes -- defer access call until later */
1720 if (opendata->o_res.access_supported == 0)
1721 return 0;
1722
1723 mask = 0;
bbd3a8ee 1724 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1725 * write mode bits, but POSIX allows the creating process to write.
1726 * use openflags to check for exec, because fmode won't
1727 * always have FMODE_EXEC set when file open for exec. */
1728 if (openflags & __FMODE_EXEC) {
1729 /* ONLY check for exec rights */
1730 mask = MAY_EXEC;
1731 } else if (fmode & FMODE_READ)
1732 mask = MAY_READ;
6168f62c
WAA		 1733
1734 cache.cred = cred;
1735 cache.jiffies = jiffies;
1736 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1737 nfs_access_add_cache(state->inode, &cache);
1738
bbd3a8ee 1739 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1740 return 0;
1741
1742 /* even though OPEN succeeded, access is denied. Close the file */
1743 nfs4_close_state(state, fmode);
998f40b5 1744 return -EACCES;
6168f62c
WAA		 1745}
1746
b257957e
AB		 1747/*
1748 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1749 */
1750static int _nfs4_proc_open(struct nfs4_opendata *data)
1751{
1752 struct inode *dir = data->dir->d_inode;
1753 struct nfs_server *server = NFS_SERVER(dir);
1754 struct nfs_openargs *o_arg = &data->o_arg;
1755 struct nfs_openres *o_res = &data->o_res;
1756 int status;
1757
1758 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1759 if (!data->rpc_done)
1760 return status;
1761 if (status != 0) {
1762 if (status == -NFS4ERR_BADNAME &&
1763 !(o_arg->open_flags & O_CREAT))
1764 return -ENOENT;
24ac23ab 1765 return status;
08ef7bd3 1766 }
24ac23ab 1767
6926afd1
TM		 1768 nfs_fattr_map_and_free_names(server, &data->f_attr);
1769
90ff0c54 1770 if (o_arg->open_flags & O_CREAT)
56ae19f3 1771 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1772 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1773 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1774 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1775 status = _nfs4_proc_open_confirm(data);
1da177e4 1776 if (status != 0)
24ac23ab 1777 return status;
1da177e4
LT		 1778 }
1779 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1780 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1781 return 0;
1da177e4
LT		 1782}
1783
d83217c1
AA		 1784static int nfs4_recover_expired_lease(struct nfs_server *server)
1785{
1786 return nfs4_client_recover_expired_lease(server->nfs_client);
1787}
1788
1da177e4
LT		 1789/*
1790 * OPEN_EXPIRED:
1791 * reclaim state on the server after a network partition.
1792 * Assumes caller holds the appropriate lock
1793 */
539cd03a 1794static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1795{
e56e0b78 1796 struct nfs4_opendata *opendata;
864472e9 1797 int ret;
1da177e4 1798
4a1c0893 1799 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1800 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1801 if (IS_ERR(opendata))
1802 return PTR_ERR(opendata);
864472e9 1803 ret = nfs4_open_recover(opendata, state);
35d05778 1804 if (ret == -ESTALE)
3d4ff43d 1805 d_drop(ctx->dentry);
c6d00e63 1806 nfs4_opendata_put(opendata);
864472e9 1807 return ret;
1da177e4
LT		 1808}
1809
a9ed2e25 1810static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1811{
539cd03a 1812 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1813 struct nfs4_exception exception = { };
1814 int err;
1815
1816 do {
539cd03a 1817 err = _nfs4_open_expired(ctx, state);
49f9a0fa
TM		 1818 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1819 continue;
a9ed2e25
TM		 1820 switch (err) {
1821 default:
1822 goto out;
1823 case -NFS4ERR_GRACE:
1824 case -NFS4ERR_DELAY:
1825 nfs4_handle_exception(server, err, &exception);
1826 err = 0;
1827 }
202b50dc 1828 } while (exception.retry);
a9ed2e25 1829out:
202b50dc
TM		 1830 return err;
1831}
1832
1da177e4
LT		 1833static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1834{
1da177e4 1835 struct nfs_open_context *ctx;
864472e9 1836 int ret;
1da177e4 1837
864472e9
TM		 1838 ctx = nfs4_state_find_open_context(state);
1839 if (IS_ERR(ctx))
91876b13 1840 return -EAGAIN;
539cd03a 1841 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1842 put_nfs_open_context(ctx);
1843 return ret;
1da177e4
LT		 1844}
1845
f062eb6c 1846#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1847static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1848{
f062eb6c 1849 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1850 nfs4_stateid *stateid = &state->stateid;
1851 int status;
1852
1853 /* If a state reset has been done, test_stateid is unneeded */
1854 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1855 return;
1856
1857 status = nfs41_test_stateid(server, stateid);
1858 if (status != NFS_OK) {
1859 /* Free the stateid unless the server explicitly
1860 * informs us the stateid is unrecognized. */
1861 if (status != -NFS4ERR_BAD_STATEID)
1862 nfs41_free_stateid(server, stateid);
6938867e 1863 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1864
6938867e
BS		 1865 write_seqlock(&state->seqlock);
1866 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1867 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1868 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1869 }
1870}
1871
1872/**
1873 * nfs41_check_open_stateid - possibly free an open stateid
1874 *
1875 * @state: NFSv4 state for an inode
1876 *
1877 * Returns NFS_OK if recovery for this stateid is now finished.
1878 * Otherwise a negative NFS4ERR value is returned.
1879 */
1880static int nfs41_check_open_stateid(struct nfs4_state *state)
1881{
1882 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1883 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1884 int status;
1885
1886 /* If a state reset has been done, test_stateid is unneeded */
1887 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1888 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1889 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1890 return -NFS4ERR_BAD_STATEID;
1891
1892 status = nfs41_test_stateid(server, stateid);
1893 if (status != NFS_OK) {
1894 /* Free the stateid unless the server explicitly
1895 * informs us the stateid is unrecognized. */
1896 if (status != -NFS4ERR_BAD_STATEID)
1897 nfs41_free_stateid(server, stateid);
1898
1899 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1900 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1901 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 1902 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 1903 }
1904 return status;
1905}
1906
1907static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1908{
eb64cf96 1909 int status;
b01dd1d8 1910
3e60ffdd
CL		 1911 nfs41_clear_delegation_stateid(state);
1912 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1913 if (status != NFS_OK)
1914 status = nfs4_open_expired(sp, state);
1915 return status;
f062eb6c
BS		 1916}
1917#endif
1918
aa53ed54
JL		 1919/*
1920 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1921 * fields corresponding to attributes that were used to store the verifier.
1922 * Make sure we clobber those fields in the later setattr call
1923 */
1924static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1925{
1926 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1927 !(sattr->ia_valid & ATTR_ATIME_SET))
1928 sattr->ia_valid |= ATTR_ATIME;
1929
1930 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1931 !(sattr->ia_valid & ATTR_MTIME_SET))
1932 sattr->ia_valid |= ATTR_MTIME;
1933}
1934
c21443c2
TM		 1935static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1936 fmode_t fmode,
1937 int flags,
1938 struct nfs4_state **res)
1939{
1940 struct nfs4_state_owner *sp = opendata->owner;
1941 struct nfs_server *server = sp->so_server;
1942 struct nfs4_state *state;
1943 unsigned int seq;
1944 int ret;
1945
1946 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1947
1948 ret = _nfs4_proc_open(opendata);
1949 if (ret != 0)
1950 goto out;
1951
1952 state = nfs4_opendata_to_nfs4_state(opendata);
1953 ret = PTR_ERR(state);
1954 if (IS_ERR(state))
1955 goto out;
1956 if (server->caps & NFS_CAP_POSIX_LOCK)
1957 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1958
1959 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1960 if (ret != 0)
1961 goto out;
1962
91876b13 1963 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
c21443c2 1964 nfs4_schedule_stateid_recovery(server, state);
c21443c2
TM		 1965 *res = state;
1966out:
1967 return ret;
1968}
1969
1da177e4 1970/*
24ac23ab 1971 * Returns a referenced nfs4_state
1da177e4 1972 */
82be417a
AA		 1973static int _nfs4_do_open(struct inode *dir,
1974 struct dentry *dentry,
1975 fmode_t fmode,
1976 int flags,
1977 struct iattr *sattr,
1978 struct rpc_cred *cred,
1979 struct nfs4_state **res,
1980 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1981{
1982 struct nfs4_state_owner *sp;
1983 struct nfs4_state *state = NULL;
1984 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1985 struct nfs4_opendata *opendata;
49f9a0fa 1986 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
aac00a8d 1987 int status;
1da177e4
LT		 1988
1989 /* Protect against reboot recovery conflicts */
1da177e4 1990 status = -ENOMEM;
d1e284d5
TM		 1991 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1992 if (sp == NULL) {
1da177e4
LT		 1993 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1994 goto out_err;
1995 }
58d9714a
TM		 1996 status = nfs4_recover_expired_lease(server);
1997 if (status != 0)
b4454fe1 1998 goto err_put_state_owner;
82a2c1b7
AV		 1999 if (dentry->d_inode != NULL)
2000 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2001 status = -ENOMEM;
49f9a0fa
TM		 2002 if (dentry->d_inode)
2003 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2004 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
49f9a0fa 2005 claim, GFP_KERNEL);
e56e0b78 2006 if (opendata == NULL)
95d35cb4 2007 goto err_put_state_owner;
1da177e4 2008
82be417a
AA		 2009 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2010 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2011 if (!opendata->f_attr.mdsthreshold)
2012 goto err_opendata_put;
1549210f 2013 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2014 }
82a2c1b7
AV		 2015 if (dentry->d_inode != NULL)
2016 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2017
c21443c2 2018 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
6168f62c
WAA		 2019 if (status != 0)
2020 goto err_opendata_put;
2021
549b19cc
TM		 2022 if ((opendata->o_arg.open_flags & O_EXCL) &&
2023 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2024 nfs4_exclusive_attrset(opendata, sattr);
2025
2026 nfs_fattr_init(opendata->o_res.f_attr);
2027 status = nfs4_do_setattr(state->inode, cred,
2028 opendata->o_res.f_attr, sattr,
2029 state);
2030 if (status == 0)
2031 nfs_setattr_update_inode(state->inode, sattr);
2032 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2033 }
82be417a
AA		 2034
2035 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2036 *ctx_th = opendata->f_attr.mdsthreshold;
2037 else
2038 kfree(opendata->f_attr.mdsthreshold);
2039 opendata->f_attr.mdsthreshold = NULL;
2040
c6d00e63 2041 nfs4_opendata_put(opendata);
1da177e4 2042 nfs4_put_state_owner(sp);
1da177e4
LT		 2043 *res = state;
2044 return 0;
c6d00e63 2045err_opendata_put:
82be417a 2046 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2047 nfs4_opendata_put(opendata);
e56e0b78
TM		 2048err_put_state_owner:
2049 nfs4_put_state_owner(sp);
1da177e4 2050out_err:
1da177e4
LT		 2051 *res = NULL;
2052 return status;
2053}
2054
2055
82be417a
AA		 2056static struct nfs4_state *nfs4_do_open(struct inode *dir,
2057 struct dentry *dentry,
2058 fmode_t fmode,
2059 int flags,
2060 struct iattr *sattr,
2061 struct rpc_cred *cred,
2062 struct nfs4_threshold **ctx_th)
1da177e4 2063{
49f9a0fa 2064 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2065 struct nfs4_exception exception = { };
2066 struct nfs4_state *res;
2067 int status;
2068
6168f62c 2069 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 2070 do {
82be417a
AA		 2071 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
2072 &res, ctx_th);
1da177e4
LT		 2073 if (status == 0)
2074 break;
2075 /* NOTE: BAD_SEQID means the server and client disagree about the
2076 * book-keeping w.r.t. state-changing operations
2077 * (OPEN/CLOSE/LOCK/LOCKU...)
2078 * It is actually a sign of a bug on the client or on the server.
2079 *
2080 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2081 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2082 * have unhashed the old state_owner for us, and that we can
2083 * therefore safely retry using a new one. We should still warn
2084 * the user though...
2085 */
2086 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2087 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2088 " returned a bad sequence-id error!\n",
2089 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2090 exception.retry = 1;
2091 continue;
2092 }
550f5747
TM		 2093 /*
2094 * BAD_STATEID on OPEN means that the server cancelled our
2095 * state before it received the OPEN_CONFIRM.
2096 * Recover by retrying the request as per the discussion
2097 * on Page 181 of RFC3530.
2098 */
2099 if (status == -NFS4ERR_BAD_STATEID) {
2100 exception.retry = 1;
2101 continue;
2102 }
aac00a8d
TM		 2103 if (status == -EAGAIN) {
2104 /* We must have found a delegation */
2105 exception.retry = 1;
2106 continue;
2107 }
49f9a0fa
TM		 2108 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2109 continue;
2110 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2111 status, &exception));
2112 } while (exception.retry);
2113 return res;
2114}
2115
659bfcd6
TM		 2116static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2117 struct nfs_fattr *fattr, struct iattr *sattr,
2118 struct nfs4_state *state)
1da177e4 2119{
3e4f6290 2120 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2121 struct nfs_setattrargs arg = {
3e4f6290 2122 .fh = NFS_FH(inode),
1da177e4
LT		 2123 .iap = sattr,
2124 .server = server,
2125 .bitmask = server->attr_bitmask,
2126 };
2127 struct nfs_setattrres res = {
2128 .fattr = fattr,
2129 .server = server,
2130 };
2131 struct rpc_message msg = {
659bfcd6
TM		 2132 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2133 .rpc_argp = &arg,
2134 .rpc_resp = &res,
2135 .rpc_cred = cred,
1da177e4 2136 };
26e976a8 2137 unsigned long timestamp = jiffies;
65e4308d 2138 int status;
1da177e4 2139
0e574af1 2140 nfs_fattr_init(fattr);
1da177e4 2141
5d422301 2142 if (state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2143 struct nfs_lockowner lockowner = {
2144 .l_owner = current->files,
2145 .l_pid = current->tgid,
2146 };
4fc8796d 2147 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2148 &lockowner);
4fc8796d
TM		 2149 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2150 FMODE_WRITE)) {
3e4f6290 2151 /* Use that stateid */
08e9eac4 2152 } else
f597c537 2153 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2154
7c513058 2155 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2156 if (status == 0 && state != NULL)
2157 renew_lease(server, timestamp);
65e4308d 2158 return status;
1da177e4
LT		 2159}
2160
659bfcd6
TM		 2161static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2162 struct nfs_fattr *fattr, struct iattr *sattr,
2163 struct nfs4_state *state)
1da177e4 2164{
3e4f6290 2165 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2166 struct nfs4_exception exception = {
2167 .state = state,
3114ea7a 2168 .inode = inode,
a1d0b5ee 2169 };
1da177e4
LT		 2170 int err;
2171 do {
451146be
TM		 2172 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2173 switch (err) {
2174 case -NFS4ERR_OPENMODE:
2175 if (state && !(state->state & FMODE_WRITE)) {
2176 err = -EBADF;
2177 if (sattr->ia_valid & ATTR_OPEN)
2178 err = -EACCES;
2179 goto out;
2180 }
2181 }
2182 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2183 } while (exception.retry);
451146be 2184out:
1da177e4
LT		 2185 return err;
2186}
2187
2188struct nfs4_closedata {
2189 struct inode *inode;
2190 struct nfs4_state *state;
2191 struct nfs_closeargs arg;
2192 struct nfs_closeres res;
516a6af6 2193 struct nfs_fattr fattr;
26e976a8 2194 unsigned long timestamp;
f7e8917a
FI		 2195 bool roc;
2196 u32 roc_barrier;
1da177e4
LT		 2197};
2198
963d8fe5 2199static void nfs4_free_closedata(void *data)
9512135d 2200{
963d8fe5
TM		 2201 struct nfs4_closedata *calldata = data;
2202 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2203 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2204
f7e8917a
FI		 2205 if (calldata->roc)
2206 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2207 nfs4_put_open_state(calldata->state);
2208 nfs_free_seqid(calldata->arg.seqid);
9512135d 2209 nfs4_put_state_owner(sp);
322b2b90 2210 nfs_sb_deactive(sb);
9512135d
TM		 2211 kfree(calldata);
2212}
2213
88069f77
TM		 2214static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2215 fmode_t fmode)
2216{
2217 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2218 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2219 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2220 case FMODE_WRITE:
88069f77 2221 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2222 break;
2223 case FMODE_READ:
88069f77 2224 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2225 break;
2226 case 0:
2227 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2228 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2229 clear_bit(NFS_OPEN_STATE, &state->flags);
2230 }
88069f77
TM		 2231 spin_unlock(&state->owner->so_lock);
2232}
2233
963d8fe5 2234static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2235{
963d8fe5 2236 struct nfs4_closedata *calldata = data;
1da177e4 2237 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2238 struct nfs_server *server = NFS_SERVER(calldata->inode);
2239
a3ca5651 2240 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2241 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2242 return;
1da177e4
LT		 2243 /* hmm. we are done with the inode, and in the process of freeing
2244 * the state_owner. we keep this around to process errors
2245 */
1da177e4
LT		 2246 switch (task->tk_status) {
2247 case 0:
f7e8917a
FI		 2248 if (calldata->roc)
2249 pnfs_roc_set_barrier(state->inode,
2250 calldata->roc_barrier);
45328c35 2251 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2252 renew_lease(server, calldata->timestamp);
88069f77
TM		 2253 nfs4_close_clear_stateid_flags(state,
2254 calldata->arg.fmode);
1da177e4
LT		 2255 break;
2256 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2257 case -NFS4ERR_OLD_STATEID:
2258 case -NFS4ERR_BAD_STATEID:
1da177e4 2259 case -NFS4ERR_EXPIRED:
dc0b027d 2260 if (calldata->arg.fmode == 0)
9e33bed5 2261 break;
1da177e4 2262 default:
72211dbe
TM		 2263 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2264 rpc_restart_call_prepare(task);
1da177e4 2265 }
72211dbe 2266 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2267 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2268 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2269}
2270
4ce70ada 2271static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2272{
4ce70ada 2273 struct nfs4_closedata *calldata = data;
9512135d 2274 struct nfs4_state *state = calldata->state;
7fdab069 2275 struct inode *inode = calldata->inode;
88069f77 2276 int call_close = 0;
9512135d 2277
a3ca5651 2278 dprintk("%s: begin!\n", __func__);
963d8fe5 2279 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2280 goto out_wait;
003707c7 2281
88069f77
TM		 2282 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2283 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2284 spin_lock(&state->owner->so_lock);
003707c7 2285 /* Calculate the change in open mode */
e7616923 2286 if (state->n_rdwr == 0) {
003707c7 2287 if (state->n_rdonly == 0) {
88069f77
TM		 2288 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2289 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2290 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2291 }
2292 if (state->n_wronly == 0) {
88069f77
TM		 2293 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2294 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2295 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2296 }
e7616923 2297 }
5d422301
TM		 2298 if (!nfs4_valid_open_stateid(state))
2299 call_close = 0;
4cecb76f 2300 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2301
2302 if (!call_close) {
963d8fe5 2303 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2304 goto out_no_action;
9512135d 2305 }
88069f77 2306
f7e8917a 2307 if (calldata->arg.fmode == 0) {
88069f77 2308 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2309 if (calldata->roc &&
b9536ad5
AA		 2310 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2311 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2312 goto out_wait;
b9536ad5 2313 }
f7e8917a 2314 }
88069f77 2315
516a6af6 2316 nfs_fattr_init(calldata->res.fattr);
26e976a8 2317 calldata->timestamp = jiffies;
7fdab069 2318 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2319 &calldata->arg.seq_args,
2320 &calldata->res.seq_res,
2240a9e2
TM		 2321 task) != 0)
2322 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2323 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2324 return;
2325out_no_action:
2326 task->tk_action = NULL;
2327out_wait:
2328 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2329}
2330
963d8fe5 2331static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2332 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2333 .rpc_call_done = nfs4_close_done,
2334 .rpc_release = nfs4_free_closedata,
2335};
2336
1da177e4
LT		 2337/*
2338 * It is possible for data to be read/written from a mem-mapped file
2339 * after the sys_close call (which hits the vfs layer as a flush).
2340 * This means that we can't safely call nfsv4 close on a file until
2341 * the inode is cleared. This in turn means that we are not good
2342 * NFSv4 citizens - we do not indicate to the server to update the file's
2343 * share state even when we are done with one of the three share
2344 * stateid's in the inode.
2345 *
2346 * NOTE: Caller must be holding the sp->so_owner semaphore!
2347 */
1f7977c1 2348int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2349{
4a35bd41 2350 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2351 struct nfs4_closedata *calldata;
b39e625b
TM		 2352 struct nfs4_state_owner *sp = state->owner;
2353 struct rpc_task *task;
5138fde0
TM		 2354 struct rpc_message msg = {
2355 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2356 .rpc_cred = state->owner->so_cred,
2357 };
c970aa85
TM		 2358 struct rpc_task_setup task_setup_data = {
2359 .rpc_client = server->client,
5138fde0 2360 .rpc_message = &msg,
c970aa85 2361 .callback_ops = &nfs4_close_ops,
101070ca 2362 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2363 .flags = RPC_TASK_ASYNC,
2364 };
9512135d 2365 int status = -ENOMEM;
1da177e4 2366
8535b2be 2367 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2368 if (calldata == NULL)
9512135d 2369 goto out;
9d12b216 2370 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2371 calldata->inode = state->inode;
1da177e4 2372 calldata->state = state;
4a35bd41 2373 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2374 calldata->arg.stateid = &state->open_stateid;
1da177e4 2375 /* Serialization for the sequence id */
8535b2be 2376 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2377 if (calldata->arg.seqid == NULL)
2378 goto out_free_calldata;
dc0b027d 2379 calldata->arg.fmode = 0;
a65318bf 2380 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2381 calldata->res.fattr = &calldata->fattr;
c1d51931 2382 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2383 calldata->res.server = server;
1f7977c1 2384 calldata->roc = pnfs_roc(state->inode);
643168c2 2385 nfs_sb_active(calldata->inode->i_sb);
9512135d 2386
1174dd1f
TM		 2387 msg.rpc_argp = &calldata->arg;
2388 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2389 task_setup_data.callback_data = calldata;
2390 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2391 if (IS_ERR(task))
2392 return PTR_ERR(task);
a49c3c77
TM		 2393 status = 0;
2394 if (wait)
2395 status = rpc_wait_for_completion_task(task);
b39e625b 2396 rpc_put_task(task);
a49c3c77 2397 return status;
9512135d
TM		 2398out_free_calldata:
2399 kfree(calldata);
2400out:
b39e625b
TM		 2401 nfs4_put_open_state(state);
2402 nfs4_put_state_owner(sp);
9512135d 2403 return status;
1da177e4
LT		 2404}
2405
2b484297 2406static struct inode *
cd9a1c0e 2407nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2408{
1da177e4 2409 struct nfs4_state *state;
1da177e4 2410
565277f6 2411 /* Protect against concurrent sillydeletes */
82be417a
AA		 2412 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2413 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2414 if (IS_ERR(state))
2415 return ERR_CAST(state);
cd9a1c0e 2416 ctx->state = state;
f46e0bd3 2417 return igrab(state->inode);
1da177e4
LT		 2418}
2419
1185a552 2420static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2421{
2422 if (ctx->state == NULL)
2423 return;
2424 if (is_sync)
643168c2 2425 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2426 else
643168c2 2427 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2428}
1da177e4
LT		 2429
2430static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2431{
43652ad5
BH		 2432 struct nfs4_server_caps_arg args = {
2433 .fhandle = fhandle,
2434 };
1da177e4
LT		 2435 struct nfs4_server_caps_res res = {};
2436 struct rpc_message msg = {
2437 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2438 .rpc_argp = &args,
1da177e4
LT		 2439 .rpc_resp = &res,
2440 };
2441 int status;
2442
7c513058 2443 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2444 if (status == 0) {
2445 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2446 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2447 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2448 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2449 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2450 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2451 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2452 server->caps |= NFS_CAP_ACLS;
2453 if (res.has_links != 0)
2454 server->caps |= NFS_CAP_HARDLINKS;
2455 if (res.has_symlinks != 0)
2456 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2457 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2458 server->caps |= NFS_CAP_FILEID;
2459 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2460 server->caps |= NFS_CAP_MODE;
2461 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2462 server->caps |= NFS_CAP_NLINK;
2463 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2464 server->caps |= NFS_CAP_OWNER;
2465 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2466 server->caps |= NFS_CAP_OWNER_GROUP;
2467 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2468 server->caps |= NFS_CAP_ATIME;
2469 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2470 server->caps |= NFS_CAP_CTIME;
2471 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2472 server->caps |= NFS_CAP_MTIME;
2473
a65318bf
TM		 2474 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2475 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2476 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2477 server->acl_bitmask = res.acl_bitmask;
264e6351 2478 server->fh_expire_type = res.fh_expire_type;
1da177e4 2479 }
cccef3b9 2480
1da177e4
LT		 2481 return status;
2482}
2483
55a97593 2484int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2485{
2486 struct nfs4_exception exception = { };
2487 int err;
2488 do {
2489 err = nfs4_handle_exception(server,
2490 _nfs4_server_capabilities(server, fhandle),
2491 &exception);
2492 } while (exception.retry);
2493 return err;
2494}
2495
2496static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2497 struct nfs_fsinfo *info)
2498{
1da177e4
LT		 2499 struct nfs4_lookup_root_arg args = {
2500 .bitmask = nfs4_fattr_bitmap,
2501 };
2502 struct nfs4_lookup_res res = {
2503 .server = server,
0e574af1 2504 .fattr = info->fattr,
1da177e4
LT		 2505 .fh = fhandle,
2506 };
2507 struct rpc_message msg = {
2508 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2509 .rpc_argp = &args,
2510 .rpc_resp = &res,
2511 };
008f55d0 2512
0e574af1 2513 nfs_fattr_init(info->fattr);
7c513058 2514 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2515}
2516
2517static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2518 struct nfs_fsinfo *info)
2519{
2520 struct nfs4_exception exception = { };
2521 int err;
2522 do {
fb8a5ba8
BS		 2523 err = _nfs4_lookup_root(server, fhandle, info);
2524 switch (err) {
2525 case 0:
2526 case -NFS4ERR_WRONGSEC:
05e9cfb4 2527 goto out;
fb8a5ba8
BS		 2528 default:
2529 err = nfs4_handle_exception(server, err, &exception);
2530 }
1da177e4 2531 } while (exception.retry);
05e9cfb4 2532out:
1da177e4
LT		 2533 return err;
2534}
2535
8f70e95f
BS		 2536static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2537 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2538{
2539 struct rpc_auth *auth;
2540 int ret;
2541
2542 auth = rpcauth_create(flavor, server->client);
e8d920c5 2543 if (IS_ERR(auth)) {
8f70e95f
BS		 2544 ret = -EIO;
2545 goto out;
2546 }
2547 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2548out:
2549 return ret;
2550}
2551
801a16dc 2552static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2553 struct nfs_fsinfo *info)
1da177e4 2554{
8f70e95f 2555 int i, len, status = 0;
0fabee24 2556 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2557
6a1a1e34 2558 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
4ea8fed5
TM		 2559 if (len < 0)
2560 return len;
8f70e95f
BS		 2561
2562 for (i = 0; i < len; i++) {
6a1a1e34
CL		 2563 /* AUTH_UNIX is the default flavor if none was specified,
2564 * thus has already been tried. */
2565 if (flav_array[i] == RPC_AUTH_UNIX)
2566 continue;
2567
8f70e95f 2568 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2569 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2570 continue;
2571 break;
8f70e95f 2572 }
fb8a5ba8
BS		 2573 /*
2574 * -EACCESS could mean that the user doesn't have correct permissions
2575 * to access the mount. It could also mean that we tried to mount
2576 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2577 * existing mount programs don't handle -EACCES very well so it should
2578 * be mapped to -EPERM instead.
2579 */
2580 if (status == -EACCES)
2581 status = -EPERM;
801a16dc
BS		 2582 return status;
2583}
2584
2585/*
2586 * get the file handle for the "/" directory on the server
2587 */
3028eb2b
BS		 2588int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2589 struct nfs_fsinfo *info)
801a16dc 2590{
fca78d6d 2591 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2592 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2593 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2594 /*
2595 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2596 * by nfs4_map_errors() as this function exits.
2597 */
fca78d6d 2598 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2599 if (status == 0)
2600 status = nfs4_server_capabilities(server, fhandle);
2601 if (status == 0)
2602 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2603 return nfs4_map_errors(status);
1da177e4
LT		 2604}
2605
bae36241
BS		 2606static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2607 struct nfs_fsinfo *info)
2608{
2609 int error;
2610 struct nfs_fattr *fattr = info->fattr;
2611
2612 error = nfs4_server_capabilities(server, mntfh);
2613 if (error < 0) {
2614 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2615 return error;
2616 }
2617
2618 error = nfs4_proc_getattr(server, mntfh, fattr);
2619 if (error < 0) {
2620 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2621 return error;
2622 }
2623
2624 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2625 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2626 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2627
2628 return error;
2629}
2630
6b97fd3d
MN		 2631/*
2632 * Get locations and (maybe) other attributes of a referral.
2633 * Note that we'll actually follow the referral later when
2634 * we detect fsid mismatch in inode revalidation
2635 */
f05d147f
BS		 2636static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2637 const struct qstr *name, struct nfs_fattr *fattr,
2638 struct nfs_fh *fhandle)
6b97fd3d
MN		 2639{
2640 int status = -ENOMEM;
2641 struct page *page = NULL;
2642 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2643
2644 page = alloc_page(GFP_KERNEL);
2645 if (page == NULL)
2646 goto out;
2647 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2648 if (locations == NULL)
2649 goto out;
2650
f05d147f 2651 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2652 if (status != 0)
2653 goto out;
2654 /* Make sure server returned a different fsid for the referral */
2655 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2656 dprintk("%s: server did not return a different fsid for"
2657 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2658 status = -EIO;
2659 goto out;
2660 }
533eb461
AA		 2661 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2662 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2663
533eb461 2664 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2665 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2666 memset(fhandle, 0, sizeof(struct nfs_fh));
2667out:
2668 if (page)
2669 __free_page(page);
5d7ca35a 2670 kfree(locations);
6b97fd3d
MN		 2671 return status;
2672}
2673
1da177e4
LT		 2674static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2675{
2676 struct nfs4_getattr_arg args = {
2677 .fh = fhandle,
2678 .bitmask = server->attr_bitmask,
2679 };
2680 struct nfs4_getattr_res res = {
2681 .fattr = fattr,
2682 .server = server,
2683 };
2684 struct rpc_message msg = {
2685 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2686 .rpc_argp = &args,
2687 .rpc_resp = &res,
2688 };
2689
0e574af1 2690 nfs_fattr_init(fattr);
7c513058 2691 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2692}
2693
2694static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2695{
2696 struct nfs4_exception exception = { };
2697 int err;
2698 do {
2699 err = nfs4_handle_exception(server,
2700 _nfs4_proc_getattr(server, fhandle, fattr),
2701 &exception);
2702 } while (exception.retry);
2703 return err;
2704}
2705
2706/*
2707 * The file is not closed if it is opened due to the a request to change
2708 * the size of the file. The open call will not be needed once the
2709 * VFS layer lookup-intents are implemented.
2710 *
2711 * Close is called when the inode is destroyed.
2712 * If we haven't opened the file for O_WRONLY, we
2713 * need to in the size_change case to obtain a stateid.
2714 *
2715 * Got race?
2716 * Because OPEN is always done by name in nfsv4, it is
2717 * possible that we opened a different file by the same
2718 * name. We can recognize this race condition, but we
2719 * can't do anything about it besides returning an error.
2720 *
2721 * This will be fixed with VFS changes (lookup-intent).
2722 */
2723static int
2724nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2725 struct iattr *sattr)
2726{
08e9eac4 2727 struct inode *inode = dentry->d_inode;
659bfcd6 2728 struct rpc_cred *cred = NULL;
d530838b 2729 struct nfs4_state *state = NULL;
1da177e4
LT		 2730 int status;
2731
8a1636c4 2732 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2733 pnfs_commit_and_return_layout(inode);
8a1636c4 2734
0e574af1 2735 nfs_fattr_init(fattr);
1da177e4 2736
2669940d
AA		 2737 /* Deal with open(O_TRUNC) */
2738 if (sattr->ia_valid & ATTR_OPEN)
2739 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2740
2741 /* Optimization: if the end result is no change, don't RPC */
2742 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2743 return 0;
2744
d530838b 2745 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2746 if (sattr->ia_valid & ATTR_FILE) {
2747 struct nfs_open_context *ctx;
2748
2749 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2750 if (ctx) {
2751 cred = ctx->cred;
2752 state = ctx->state;
2753 }
659bfcd6 2754 }
08e9eac4 2755
659bfcd6 2756 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2757 if (status == 0)
2758 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2759 return status;
2760}
2761
0c2e53f1
TM		 2762static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2763 const struct qstr *name, struct nfs_fh *fhandle,
2764 struct nfs_fattr *fattr)
2b3de441 2765{
0c2e53f1 2766 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2767 int status;
2768 struct nfs4_lookup_arg args = {
2769 .bitmask = server->attr_bitmask,
0c2e53f1 2770 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2771 .name = name,
2772 };
2773 struct nfs4_lookup_res res = {
2774 .server = server,
2775 .fattr = fattr,
2776 .fh = fhandle,
2777 };
2778 struct rpc_message msg = {
2779 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2780 .rpc_argp = &args,
2781 .rpc_resp = &res,
2782 };
2783
2784 nfs_fattr_init(fattr);
2785
1da177e4 2786 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2787 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2788 dprintk("NFS reply lookup: %d\n", status);
2789 return status;
2790}
2791
72de53ec 2792static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2793{
7ebb9315 2794 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2795 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2796 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2797 fattr->nlink = 2;
2798}
2799
72de53ec
BS		 2800static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2801 struct qstr *name, struct nfs_fh *fhandle,
2802 struct nfs_fattr *fattr)
1da177e4
LT		 2803{
2804 struct nfs4_exception exception = { };
72de53ec 2805 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2806 int err;
2807 do {
72de53ec
BS		 2808 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2809 switch (err) {
08ef7bd3 2810 case -NFS4ERR_BADNAME:
72de53ec
BS		 2811 err = -ENOENT;
2812 goto out;
0c2e53f1 2813 case -NFS4ERR_MOVED:
f05d147f 2814 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2815 goto out;
0c2e53f1 2816 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2817 err = -EPERM;
2818 if (client != *clnt)
2819 goto out;
2820
2821 client = nfs4_create_sec_client(client, dir, name);
2822 if (IS_ERR(client))
2823 return PTR_ERR(client);
2824
2825 exception.retry = 1;
2826 break;
2827 default:
2828 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2829 }
1da177e4 2830 } while (exception.retry);
72de53ec
BS		 2831
2832out:
2833 if (err == 0)
2834 *clnt = client;
2835 else if (client != *clnt)
2836 rpc_shutdown_client(client);
2837
1da177e4
LT		 2838 return err;
2839}
2840
80a16b21 2841static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2842 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2843{
2844 int status;
2845 struct rpc_clnt *client = NFS_CLIENT(dir);
2846
2847 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2848 if (client != NFS_CLIENT(dir)) {
2849 rpc_shutdown_client(client);
2850 nfs_fixup_secinfo_attributes(fattr);
2851 }
2852 return status;
2853}
2854
f05d147f
BS		 2855struct rpc_clnt *
2856nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2857 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2858{
2859 int status;
2860 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2861
2862 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2863 if (status < 0) {
2864 rpc_shutdown_client(client);
2865 return ERR_PTR(status);
2866 }
2867 return client;
2868}
2869
1da177e4
LT		 2870static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2871{
76b32999 2872 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2873 struct nfs4_accessargs args = {
2874 .fh = NFS_FH(inode),
a4980e78 2875 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2876 };
2877 struct nfs4_accessres res = {
2878 .server = server,
1da177e4 2879 };
1da177e4
LT		 2880 struct rpc_message msg = {
2881 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2882 .rpc_argp = &args,
2883 .rpc_resp = &res,
2884 .rpc_cred = entry->cred,
2885 };
2886 int mode = entry->mask;
2887 int status;
2888
2889 /*
2890 * Determine which access bits we want to ask for...
2891 */
2892 if (mode & MAY_READ)
2893 args.access |= NFS4_ACCESS_READ;
2894 if (S_ISDIR(inode->i_mode)) {
2895 if (mode & MAY_WRITE)
2896 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2897 if (mode & MAY_EXEC)
2898 args.access |= NFS4_ACCESS_LOOKUP;
2899 } else {
2900 if (mode & MAY_WRITE)
2901 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2902 if (mode & MAY_EXEC)
2903 args.access |= NFS4_ACCESS_EXECUTE;
2904 }
c407d41a
TM		 2905
2906 res.fattr = nfs_alloc_fattr();
2907 if (res.fattr == NULL)
2908 return -ENOMEM;
2909
7c513058 2910 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2911 if (!status) {
6168f62c 2912 nfs_access_set_mask(entry, res.access);
c407d41a 2913 nfs_refresh_inode(inode, res.fattr);
1da177e4 2914 }
c407d41a 2915 nfs_free_fattr(res.fattr);
1da177e4
LT		 2916 return status;
2917}
2918
2919static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2920{
2921 struct nfs4_exception exception = { };
2922 int err;
2923 do {
2924 err = nfs4_handle_exception(NFS_SERVER(inode),
2925 _nfs4_proc_access(inode, entry),
2926 &exception);
2927 } while (exception.retry);
2928 return err;
2929}
2930
2931/*
2932 * TODO: For the time being, we don't try to get any attributes
2933 * along with any of the zero-copy operations READ, READDIR,
2934 * READLINK, WRITE.
2935 *
2936 * In the case of the first three, we want to put the GETATTR
2937 * after the read-type operation -- this is because it is hard
2938 * to predict the length of a GETATTR response in v4, and thus
2939 * align the READ data correctly. This means that the GETATTR
2940 * may end up partially falling into the page cache, and we should
2941 * shift it into the 'tail' of the xdr_buf before processing.
2942 * To do this efficiently, we need to know the total length
2943 * of data received, which doesn't seem to be available outside
2944 * of the RPC layer.
2945 *
2946 * In the case of WRITE, we also want to put the GETATTR after
2947 * the operation -- in this case because we want to make sure
140150db 2948 * we get the post-operation mtime and size.
1da177e4
LT		 2949 *
2950 * Both of these changes to the XDR layer would in fact be quite
2951 * minor, but I decided to leave them for a subsequent patch.
2952 */
2953static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2954 unsigned int pgbase, unsigned int pglen)
2955{
2956 struct nfs4_readlink args = {
2957 .fh = NFS_FH(inode),
2958 .pgbase = pgbase,
2959 .pglen = pglen,
2960 .pages = &page,
2961 };
f50c7000 2962 struct nfs4_readlink_res res;
1da177e4
LT		 2963 struct rpc_message msg = {
2964 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2965 .rpc_argp = &args,
f50c7000 2966 .rpc_resp = &res,
1da177e4
LT		 2967 };
2968
7c513058 2969 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2970}
2971
2972static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2973 unsigned int pgbase, unsigned int pglen)
2974{
2975 struct nfs4_exception exception = { };
2976 int err;
2977 do {
2978 err = nfs4_handle_exception(NFS_SERVER(inode),
2979 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2980 &exception);
2981 } while (exception.retry);
2982 return err;
2983}
2984
1da177e4 2985/*
8867fe58 2986 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2987 */
1da177e4
LT		 2988static int
2989nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2990 int flags)
1da177e4 2991{
8867fe58 2992 struct nfs_open_context *ctx;
1da177e4 2993 struct nfs4_state *state;
1da177e4
LT		 2994 int status = 0;
2995
8867fe58
MS		 2996 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2997 if (IS_ERR(ctx))
2998 return PTR_ERR(ctx);
2999
a8a5da99 3000 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 3001 state = nfs4_do_open(dir, dentry, ctx->mode,
3002 flags, sattr, ctx->cred,
3003 &ctx->mdsthreshold);
d4d9cdcb 3004 d_drop(dentry);
1da177e4
LT		 3005 if (IS_ERR(state)) {
3006 status = PTR_ERR(state);
c0204fd2 3007 goto out;
1da177e4 3008 }
d4d9cdcb 3009 d_add(dentry, igrab(state->inode));
d75340cc 3010 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 3011 ctx->state = state;
1da177e4 3012out:
8867fe58 3013 put_nfs_open_context(ctx);
1da177e4
LT		 3014 return status;
3015}
3016
3017static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3018{
16e42959 3019 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3020 struct nfs_removeargs args = {
1da177e4 3021 .fh = NFS_FH(dir),
26fe5750 3022 .name = *name,
16e42959 3023 };
4fdc17b2 3024 struct nfs_removeres res = {
16e42959 3025 .server = server,
1da177e4 3026 };
1da177e4 3027 struct rpc_message msg = {
4fdc17b2
TM		 3028 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3029 .rpc_argp = &args,
3030 .rpc_resp = &res,
1da177e4 3031 };
778d2817 3032 int status;
1da177e4 3033
7c513058 3034 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3035 if (status == 0)
16e42959 3036 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3037 return status;
3038}
3039
3040static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3041{
3042 struct nfs4_exception exception = { };
3043 int err;
3044 do {
3045 err = nfs4_handle_exception(NFS_SERVER(dir),
3046 _nfs4_proc_remove(dir, name),
3047 &exception);
3048 } while (exception.retry);
3049 return err;
3050}
3051
e4eff1a6 3052static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3053{
e4eff1a6
TM		 3054 struct nfs_server *server = NFS_SERVER(dir);
3055 struct nfs_removeargs *args = msg->rpc_argp;
3056 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3057
e4eff1a6 3058 res->server = server;
1da177e4 3059 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3060 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 3061}
3062
34e137cc
BS		 3063static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3064{
d9afbd1b
TM		 3065 nfs4_setup_sequence(NFS_SERVER(data->dir),
3066 &data->args.seq_args,
3067 &data->res.seq_res,
3068 task);
1da177e4
LT		 3069}
3070
e4eff1a6 3071static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3072{
e4eff1a6
TM		 3073 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3074
14516c3a
TM		 3075 if (!nfs4_sequence_done(task, &res->seq_res))
3076 return 0;
9e33bed5 3077 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3078 return 0;
3079 update_changeattr(dir, &res->cinfo);
e4eff1a6 3080 return 1;
1da177e4
LT		 3081}
3082
d3d4152a
JL		 3083static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3084{
3085 struct nfs_server *server = NFS_SERVER(dir);
3086 struct nfs_renameargs *arg = msg->rpc_argp;
3087 struct nfs_renameres *res = msg->rpc_resp;
3088
3089 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3090 res->server = server;
9d12b216 3091 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3092}
3093
c6bfa1a1
BS		 3094static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3095{
d9afbd1b
TM		 3096 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3097 &data->args.seq_args,
3098 &data->res.seq_res,
3099 task);
d3d4152a
JL		 3100}
3101
3102static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3103 struct inode *new_dir)
3104{
3105 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3106
3107 if (!nfs4_sequence_done(task, &res->seq_res))
3108 return 0;
3109 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3110 return 0;
3111
3112 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3113 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3114 return 1;
3115}
3116
1da177e4
LT		 3117static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3118 struct inode *new_dir, struct qstr *new_name)
3119{
6caf2c82 3120 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3121 struct nfs_renameargs arg = {
1da177e4
LT		 3122 .old_dir = NFS_FH(old_dir),
3123 .new_dir = NFS_FH(new_dir),
3124 .old_name = old_name,
3125 .new_name = new_name,
6caf2c82 3126 };
e8582a8b 3127 struct nfs_renameres res = {
6caf2c82 3128 .server = server,
1da177e4 3129 };
1da177e4
LT		 3130 struct rpc_message msg = {
3131 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3132 .rpc_argp = &arg,
3133 .rpc_resp = &res,
3134 };
011fff72 3135 int status = -ENOMEM;
1da177e4 3136
7c513058 3137 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3138 if (!status) {
3139 update_changeattr(old_dir, &res.old_cinfo);
3140 update_changeattr(new_dir, &res.new_cinfo);
3141 }
3142 return status;
3143}
3144
3145static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3146 struct inode *new_dir, struct qstr *new_name)
3147{
3148 struct nfs4_exception exception = { };
3149 int err;
3150 do {
3151 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3152 _nfs4_proc_rename(old_dir, old_name,
3153 new_dir, new_name),
3154 &exception);
3155 } while (exception.retry);
3156 return err;
3157}
3158
3159static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3160{
91ba2eee 3161 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3162 struct nfs4_link_arg arg = {
3163 .fh = NFS_FH(inode),
3164 .dir_fh = NFS_FH(dir),
3165 .name = name,
91ba2eee
TM		 3166 .bitmask = server->attr_bitmask,
3167 };
91ba2eee
TM		 3168 struct nfs4_link_res res = {
3169 .server = server,
1da177e4 3170 };
1da177e4
LT		 3171 struct rpc_message msg = {
3172 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3173 .rpc_argp = &arg,
91ba2eee 3174 .rpc_resp = &res,
1da177e4 3175 };
136f2627
TM		 3176 int status = -ENOMEM;
3177
3178 res.fattr = nfs_alloc_fattr();
778d2817 3179 if (res.fattr == NULL)
136f2627 3180 goto out;
1da177e4 3181
7c513058 3182 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3183 if (!status) {
3184 update_changeattr(dir, &res.cinfo);
73a3d07c 3185 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3186 }
136f2627 3187out:
136f2627 3188 nfs_free_fattr(res.fattr);
1da177e4
LT		 3189 return status;
3190}
3191
3192static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3193{
3194 struct nfs4_exception exception = { };
3195 int err;
3196 do {
3197 err = nfs4_handle_exception(NFS_SERVER(inode),
3198 _nfs4_proc_link(inode, dir, name),
3199 &exception);
3200 } while (exception.retry);
3201 return err;
3202}
3203
57dc9a57
TM		 3204struct nfs4_createdata {
3205 struct rpc_message msg;
3206 struct nfs4_create_arg arg;
3207 struct nfs4_create_res res;
3208 struct nfs_fh fh;
3209 struct nfs_fattr fattr;
57dc9a57
TM		 3210};
3211
3212static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3213 struct qstr *name, struct iattr *sattr, u32 ftype)
3214{
3215 struct nfs4_createdata *data;
3216
3217 data = kzalloc(sizeof(*data), GFP_KERNEL);
3218 if (data != NULL) {
3219 struct nfs_server *server = NFS_SERVER(dir);
3220
3221 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3222 data->msg.rpc_argp = &data->arg;
3223 data->msg.rpc_resp = &data->res;
3224 data->arg.dir_fh = NFS_FH(dir);
3225 data->arg.server = server;
3226 data->arg.name = name;
3227 data->arg.attrs = sattr;
3228 data->arg.ftype = ftype;
3229 data->arg.bitmask = server->attr_bitmask;
3230 data->res.server = server;
3231 data->res.fh = &data->fh;
3232 data->res.fattr = &data->fattr;
57dc9a57 3233 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3234 }
3235 return data;
3236}
3237
3238static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3239{
7c513058 3240 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3241 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3242 if (status == 0) {
3243 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3244 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3245 }
3246 return status;
3247}
3248
3249static void nfs4_free_createdata(struct nfs4_createdata *data)
3250{
3251 kfree(data);
3252}
3253
4f390c15 3254static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3255 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3256{
57dc9a57
TM		 3257 struct nfs4_createdata *data;
3258 int status = -ENAMETOOLONG;
1da177e4 3259
94a6d753 3260 if (len > NFS4_MAXPATHLEN)
57dc9a57 3261 goto out;
4f390c15 3262
57dc9a57
TM		 3263 status = -ENOMEM;
3264 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3265 if (data == NULL)
3266 goto out;
3267
3268 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3269 data->arg.u.symlink.pages = &page;
3270 data->arg.u.symlink.len = len;
1da177e4 3271
57dc9a57
TM		 3272 status = nfs4_do_create(dir, dentry, data);
3273
3274 nfs4_free_createdata(data);
3275out:
1da177e4
LT		 3276 return status;
3277}
3278
4f390c15 3279static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3280 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3281{
3282 struct nfs4_exception exception = { };
3283 int err;
3284 do {
3285 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3286 _nfs4_proc_symlink(dir, dentry, page,
3287 len, sattr),
1da177e4
LT		 3288 &exception);
3289 } while (exception.retry);
3290 return err;
3291}
3292
3293static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3294 struct iattr *sattr)
3295{
57dc9a57
TM		 3296 struct nfs4_createdata *data;
3297 int status = -ENOMEM;
1da177e4 3298
57dc9a57
TM		 3299 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3300 if (data == NULL)
3301 goto out;
3302
3303 status = nfs4_do_create(dir, dentry, data);
3304
3305 nfs4_free_createdata(data);
3306out:
1da177e4
LT		 3307 return status;
3308}
3309
3310static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3311 struct iattr *sattr)
3312{
3313 struct nfs4_exception exception = { };
3314 int err;
a8a5da99
AK		 3315
3316 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3317 do {
3318 err = nfs4_handle_exception(NFS_SERVER(dir),
3319 _nfs4_proc_mkdir(dir, dentry, sattr),
3320 &exception);
3321 } while (exception.retry);
3322 return err;
3323}
3324
3325static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3326 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3327{
3328 struct inode *dir = dentry->d_inode;
3329 struct nfs4_readdir_arg args = {
3330 .fh = NFS_FH(dir),
56e4ebf8 3331 .pages = pages,
1da177e4
LT		 3332 .pgbase = 0,
3333 .count = count,
96d25e53 3334 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3335 .plus = plus,
1da177e4
LT		 3336 };
3337 struct nfs4_readdir_res res;
3338 struct rpc_message msg = {
3339 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3340 .rpc_argp = &args,
3341 .rpc_resp = &res,
3342 .rpc_cred = cred,
3343 };
3344 int status;
3345
3110ff80 3346 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3347 dentry->d_parent->d_name.name,
3348 dentry->d_name.name,
3349 (unsigned long long)cookie);
c3f52af3 3350 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3351 res.pgbase = args.pgbase;
7c513058 3352 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3353 if (status >= 0) {
c3f52af3 3354 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3355 status += args.pgbase;
3356 }
c4812998
TM		 3357
3358 nfs_invalidate_atime(dir);
3359
3110ff80 3360 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3361 return status;
3362}
3363
3364static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3365 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3366{
3367 struct nfs4_exception exception = { };
3368 int err;
3369 do {
3370 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3371 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3372 pages, count, plus),
1da177e4
LT		 3373 &exception);
3374 } while (exception.retry);
3375 return err;
3376}
3377
3378static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3379 struct iattr *sattr, dev_t rdev)
3380{
57dc9a57
TM		 3381 struct nfs4_createdata *data;
3382 int mode = sattr->ia_mode;
3383 int status = -ENOMEM;
1da177e4 3384
57dc9a57
TM		 3385 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3386 if (data == NULL)
3387 goto out;
3388
1da177e4 3389 if (S_ISFIFO(mode))
57dc9a57 3390 data->arg.ftype = NF4FIFO;
1da177e4 3391 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3392 data->arg.ftype = NF4BLK;
3393 data->arg.u.device.specdata1 = MAJOR(rdev);
3394 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3395 }
3396 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3397 data->arg.ftype = NF4CHR;
3398 data->arg.u.device.specdata1 = MAJOR(rdev);
3399 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3400 } else if (!S_ISSOCK(mode)) {
3401 status = -EINVAL;
3402 goto out_free;
1da177e4 3403 }
1da177e4 3404
57dc9a57 3405 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3406out_free:
57dc9a57
TM		 3407 nfs4_free_createdata(data);
3408out:
1da177e4
LT		 3409 return status;
3410}
3411
3412static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3413 struct iattr *sattr, dev_t rdev)
3414{
3415 struct nfs4_exception exception = { };
3416 int err;
a8a5da99
AK		 3417
3418 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3419 do {
3420 err = nfs4_handle_exception(NFS_SERVER(dir),
3421 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3422 &exception);
3423 } while (exception.retry);
3424 return err;
3425}
3426
3427static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3428 struct nfs_fsstat *fsstat)
3429{
3430 struct nfs4_statfs_arg args = {
3431 .fh = fhandle,
3432 .bitmask = server->attr_bitmask,
3433 };
24ad148a
BH		 3434 struct nfs4_statfs_res res = {
3435 .fsstat = fsstat,
3436 };
1da177e4
LT		 3437 struct rpc_message msg = {
3438 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3439 .rpc_argp = &args,
24ad148a 3440 .rpc_resp = &res,
1da177e4
LT		 3441 };
3442
0e574af1 3443 nfs_fattr_init(fsstat->fattr);
7c513058 3444 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3445}
3446
3447static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3448{
3449 struct nfs4_exception exception = { };
3450 int err;
3451 do {
3452 err = nfs4_handle_exception(server,
3453 _nfs4_proc_statfs(server, fhandle, fsstat),
3454 &exception);
3455 } while (exception.retry);
3456 return err;
3457}
3458
3459static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3460 struct nfs_fsinfo *fsinfo)
3461{
3462 struct nfs4_fsinfo_arg args = {
3463 .fh = fhandle,
3464 .bitmask = server->attr_bitmask,
3465 };
3dda5e43
BH		 3466 struct nfs4_fsinfo_res res = {
3467 .fsinfo = fsinfo,
3468 };
1da177e4
LT		 3469 struct rpc_message msg = {
3470 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3471 .rpc_argp = &args,
3dda5e43 3472 .rpc_resp = &res,
1da177e4
LT		 3473 };
3474
7c513058 3475 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3476}
3477
3478static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3479{
3480 struct nfs4_exception exception = { };
3481 int err;
3482
3483 do {
3484 err = nfs4_handle_exception(server,
3485 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3486 &exception);
3487 } while (exception.retry);
3488 return err;
3489}
3490
3491static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3492{
e38eb650
BS		 3493 int error;
3494
0e574af1 3495 nfs_fattr_init(fsinfo->fattr);
e38eb650 3496 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3497 if (error == 0) {
3498 /* block layout checks this! */
3499 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3500 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3501 }
e38eb650
BS		 3502
3503 return error;
1da177e4
LT		 3504}
3505
3506static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3507 struct nfs_pathconf *pathconf)
3508{
3509 struct nfs4_pathconf_arg args = {
3510 .fh = fhandle,
3511 .bitmask = server->attr_bitmask,
3512 };
d45b2989
BH		 3513 struct nfs4_pathconf_res res = {
3514 .pathconf = pathconf,
3515 };
1da177e4
LT		 3516 struct rpc_message msg = {
3517 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3518 .rpc_argp = &args,
d45b2989 3519 .rpc_resp = &res,
1da177e4
LT		 3520 };
3521
3522 /* None of the pathconf attributes are mandatory to implement */
3523 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3524 memset(pathconf, 0, sizeof(*pathconf));
3525 return 0;
3526 }
3527
0e574af1 3528 nfs_fattr_init(pathconf->fattr);
7c513058 3529 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3530}
3531
3532static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3533 struct nfs_pathconf *pathconf)
3534{
3535 struct nfs4_exception exception = { };
3536 int err;
3537
3538 do {
3539 err = nfs4_handle_exception(server,
3540 _nfs4_proc_pathconf(server, fhandle, pathconf),
3541 &exception);
3542 } while (exception.retry);
3543 return err;
3544}
3545
5521abfd 3546int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3547 const struct nfs_open_context *ctx,
3548 const struct nfs_lock_context *l_ctx,
3549 fmode_t fmode)
3550{
3551 const struct nfs_lockowner *lockowner = NULL;
3552
3553 if (l_ctx != NULL)
3554 lockowner = &l_ctx->lockowner;
5521abfd 3555 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3556}
3557EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3558
5521abfd
TM		 3559static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3560 const struct nfs_open_context *ctx,
3561 const struct nfs_lock_context *l_ctx,
3562 fmode_t fmode)
3563{
3564 nfs4_stateid current_stateid;
3565
3566 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3567 return false;
3568 return nfs4_stateid_match(stateid, &current_stateid);
3569}
3570
3571static bool nfs4_error_stateid_expired(int err)
3572{
3573 switch (err) {
3574 case -NFS4ERR_DELEG_REVOKED:
3575 case -NFS4ERR_ADMIN_REVOKED:
3576 case -NFS4ERR_BAD_STATEID:
3577 case -NFS4ERR_STALE_STATEID:
3578 case -NFS4ERR_OLD_STATEID:
3579 case -NFS4ERR_OPENMODE:
3580 case -NFS4ERR_EXPIRED:
3581 return true;
3582 }
3583 return false;
3584}
3585
d20581aa
BH		 3586void __nfs4_read_done_cb(struct nfs_read_data *data)
3587{
cd841605 3588 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3589}
3590
cbdabc7f 3591static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3592{
cd841605 3593 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3594
9e33bed5 3595 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3596 rpc_restart_call_prepare(task);
ec06c096 3597 return -EAGAIN;
1da177e4 3598 }
8850df99 3599
d20581aa 3600 __nfs4_read_done_cb(data);
1da177e4 3601 if (task->tk_status > 0)
ec06c096
TM		 3602 renew_lease(server, data->timestamp);
3603 return 0;
1da177e4
LT		 3604}
3605
5521abfd
TM		 3606static bool nfs4_read_stateid_changed(struct rpc_task *task,
3607 struct nfs_readargs *args)
3608{
3609
3610 if (!nfs4_error_stateid_expired(task->tk_status) ||
3611 nfs4_stateid_is_current(&args->stateid,
3612 args->context,
3613 args->lock_context,
3614 FMODE_READ))
3615 return false;
3616 rpc_restart_call_prepare(task);
3617 return true;
3618}
3619
cbdabc7f
AA		 3620static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3621{
3622
3623 dprintk("--> %s\n", __func__);
3624
3625 if (!nfs4_sequence_done(task, &data->res.seq_res))
3626 return -EAGAIN;
5521abfd
TM		 3627 if (nfs4_read_stateid_changed(task, &data->args))
3628 return -EAGAIN;
d20581aa
BH		 3629 return data->read_done_cb ? data->read_done_cb(task, data) :
3630 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3631}
3632
bdc7f021 3633static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3634{
1da177e4 3635 data->timestamp = jiffies;
cbdabc7f 3636 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3637 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3638 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3639}
3640
ea7c3303
BS		 3641static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3642{
9b206149 3643 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3644 &data->args.seq_args,
3645 &data->res.seq_res,
9b206149
TM		 3646 task))
3647 return;
3648 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3649 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3650}
3651
b029bc9b 3652static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3653{
cd841605 3654 struct inode *inode = data->header->inode;
1da177e4 3655
9e33bed5 3656 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3657 rpc_restart_call_prepare(task);
788e7a89 3658 return -EAGAIN;
1da177e4 3659 }
4f9838c7 3660 if (task->tk_status >= 0) {
1da177e4 3661 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3662 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3663 }
788e7a89 3664 return 0;
1da177e4
LT		 3665}
3666
5521abfd
TM		 3667static bool nfs4_write_stateid_changed(struct rpc_task *task,
3668 struct nfs_writeargs *args)
3669{
3670
3671 if (!nfs4_error_stateid_expired(task->tk_status) ||
3672 nfs4_stateid_is_current(&args->stateid,
3673 args->context,
3674 args->lock_context,
3675 FMODE_WRITE))
3676 return false;
3677 rpc_restart_call_prepare(task);
3678 return true;
3679}
3680
b029bc9b
FI		 3681static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3682{
3683 if (!nfs4_sequence_done(task, &data->res.seq_res))
3684 return -EAGAIN;
5521abfd
TM		 3685 if (nfs4_write_stateid_changed(task, &data->args))
3686 return -EAGAIN;
d20581aa
BH		 3687 return data->write_done_cb ? data->write_done_cb(task, data) :
3688 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3689}
3690
5a37f851
TM		 3691static
3692bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3693{
5a37f851
TM		 3694 const struct nfs_pgio_header *hdr = data->header;
3695
3696 /* Don't request attributes for pNFS or O_DIRECT writes */
3697 if (data->ds_clp != NULL || hdr->dreq != NULL)
3698 return false;
3699 /* Otherwise, request attributes if and only if we don't hold
3700 * a delegation
3701 */
011e2a7f 3702 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3703}
a69aef14 3704
bdc7f021 3705static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3706{
cd841605 3707 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3708
5a37f851 3709 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3710 data->args.bitmask = NULL;
3711 data->res.fattr = NULL;
3712 } else
3713 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3714
b029bc9b
FI		 3715 if (!data->write_done_cb)
3716 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3717 data->res.server = server;
1da177e4
LT		 3718 data->timestamp = jiffies;
3719
bdc7f021 3720 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3721 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3722}
3723
c6cb80d0
BS		 3724static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3725{
9b206149 3726 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3727 &data->args.seq_args,
3728 &data->res.seq_res,
9b206149
TM		 3729 task))
3730 return;
3731 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3732 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 3733}
3734
0b7c0153 3735static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3736{
d9afbd1b
TM		 3737 nfs4_setup_sequence(NFS_SERVER(data->inode),
3738 &data->args.seq_args,
3739 &data->res.seq_res,
3740 task);
1da177e4
LT		 3741}
3742
0b7c0153 3743static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3744{
1da177e4 3745 struct inode *inode = data->inode;
14516c3a 3746
9e33bed5 3747 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3748 rpc_restart_call_prepare(task);
788e7a89 3749 return -EAGAIN;
1da177e4 3750 }
788e7a89 3751 return 0;
1da177e4
LT		 3752}
3753
0b7c0153 3754static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3755{
3756 if (!nfs4_sequence_done(task, &data->res.seq_res))
3757 return -EAGAIN;
0b7c0153 3758 return data->commit_done_cb(task, data);
5f452431
FI		 3759}
3760
0b7c0153 3761static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3762{
788e7a89 3763 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3764
0b7c0153
FI		 3765 if (data->commit_done_cb == NULL)
3766 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3767 data->res.server = server;
bdc7f021 3768 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3769 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3770}
3771
9bc4e3ca
CL		 3772struct nfs4_renewdata {
3773 struct nfs_client *client;
3774 unsigned long timestamp;
3775};
3776
1da177e4
LT		 3777/*
3778 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3779 * standalone procedure for queueing an asynchronous RENEW.
3780 */
9bc4e3ca 3781static void nfs4_renew_release(void *calldata)
dc96aef9 3782{
9bc4e3ca
CL		 3783 struct nfs4_renewdata *data = calldata;
3784 struct nfs_client *clp = data->client;
dc96aef9 3785
0851de06
AB		 3786 if (atomic_read(&clp->cl_count) > 1)
3787 nfs4_schedule_state_renewal(clp);
3788 nfs_put_client(clp);
9bc4e3ca 3789 kfree(data);
dc96aef9
AB		 3790}
3791
9bc4e3ca 3792static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3793{
9bc4e3ca
CL		 3794 struct nfs4_renewdata *data = calldata;
3795 struct nfs_client *clp = data->client;
3796 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3797
3798 if (task->tk_status < 0) {
95baa25c 3799 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3800 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3801 return;
3802 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3803 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3804 return;
3805 }
3806 nfs4_schedule_path_down_recovery(clp);
1da177e4 3807 }
452e9352 3808 do_renew_lease(clp, timestamp);
1da177e4
LT		 3809}
3810
963d8fe5
TM		 3811static const struct rpc_call_ops nfs4_renew_ops = {
3812 .rpc_call_done = nfs4_renew_done,
dc96aef9 3813 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3814};
3815
2f60ea6b 3816static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3817{
3818 struct rpc_message msg = {
3819 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3820 .rpc_argp = clp,
b4454fe1 3821 .rpc_cred = cred,
1da177e4 3822 };
9bc4e3ca 3823 struct nfs4_renewdata *data;
1da177e4 3824
2f60ea6b
TM		 3825 if (renew_flags == 0)
3826 return 0;
0851de06
AB		 3827 if (!atomic_inc_not_zero(&clp->cl_count))
3828 return -EIO;
b569ad34 3829 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3830 if (data == NULL)
3831 return -ENOMEM;
3832 data->client = clp;
3833 data->timestamp = jiffies;
bc7a05ca 3834 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 3835 &nfs4_renew_ops, data);
1da177e4
LT		 3836}
3837
8534d4ec 3838static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3839{
3840 struct rpc_message msg = {
3841 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3842 .rpc_argp = clp,
b4454fe1 3843 .rpc_cred = cred,
1da177e4
LT		 3844 };
3845 unsigned long now = jiffies;
3846 int status;
3847
bc7a05ca 3848 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3849 if (status < 0)
3850 return status;
452e9352 3851 do_renew_lease(clp, now);
1da177e4
LT		 3852 return 0;
3853}
3854
aa1870af
BF		 3855static inline int nfs4_server_supports_acls(struct nfs_server *server)
3856{
3857 return (server->caps & NFS_CAP_ACLS)
3858 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3859 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3860}
3861
21f498c2
TM		 3862/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3863 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3864 * the stack.
3865 */
21f498c2 3866#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3867
e9e3d724
NH		 3868static int buf_to_pages_noslab(const void *buf, size_t buflen,
3869 struct page **pages, unsigned int *pgbase)
3870{
3871 struct page *newpage, **spages;
3872 int rc = 0;
3873 size_t len;
3874 spages = pages;
3875
3876 do {
21f498c2 3877 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3878 newpage = alloc_page(GFP_KERNEL);
3879
3880 if (newpage == NULL)
3881 goto unwind;
3882 memcpy(page_address(newpage), buf, len);
3883 buf += len;
3884 buflen -= len;
3885 *pages++ = newpage;
3886 rc++;
3887 } while (buflen != 0);
3888
3889 return rc;
3890
3891unwind:
3892 for(; rc > 0; rc--)
3893 __free_page(spages[rc-1]);
3894 return -ENOMEM;
3895}
3896
e50a1c2e
BF		 3897struct nfs4_cached_acl {
3898 int cached;
3899 size_t len;
3e9d4154 3900 char data[0];
e50a1c2e
BF		 3901};
3902
3903static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3904{
3905 struct nfs_inode *nfsi = NFS_I(inode);
3906
3907 spin_lock(&inode->i_lock);
3908 kfree(nfsi->nfs4_acl);
3909 nfsi->nfs4_acl = acl;
3910 spin_unlock(&inode->i_lock);
3911}
3912
3913static void nfs4_zap_acl_attr(struct inode *inode)
3914{
3915 nfs4_set_cached_acl(inode, NULL);
3916}
3917
3918static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3919{
3920 struct nfs_inode *nfsi = NFS_I(inode);
3921 struct nfs4_cached_acl *acl;
3922 int ret = -ENOENT;
3923
3924 spin_lock(&inode->i_lock);
3925 acl = nfsi->nfs4_acl;
3926 if (acl == NULL)
3927 goto out;
3928 if (buf == NULL) /* user is just asking for length */
3929 goto out_len;
3930 if (acl->cached == 0)
3931 goto out;
3932 ret = -ERANGE; /* see getxattr(2) man page */
3933 if (acl->len > buflen)
3934 goto out;
3935 memcpy(buf, acl->data, acl->len);
3936out_len:
3937 ret = acl->len;
3938out:
3939 spin_unlock(&inode->i_lock);
3940 return ret;
3941}
3942
5794d21e 3943static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3944{
3945 struct nfs4_cached_acl *acl;
b291f1b1 3946 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3947
1f1ea6c2 3948 if (buflen <= PAGE_SIZE) {
b291f1b1 3949 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3950 if (acl == NULL)
3951 goto out;
3952 acl->cached = 1;
5794d21e 3953 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3954 } else {
3955 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3956 if (acl == NULL)
3957 goto out;
3958 acl->cached = 0;
3959 }
3960 acl->len = acl_len;
3961out:
3962 nfs4_set_cached_acl(inode, acl);
3963}
3964
bf118a34
AA		 3965/*
3966 * The getxattr API returns the required buffer length when called with a
3967 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3968 * the required buf. On a NULL buf, we send a page of data to the server
3969 * guessing that the ACL request can be serviced by a page. If so, we cache
3970 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3971 * the cache. If not so, we throw away the page, and cache the required
3972 * length. The next getxattr call will then produce another round trip to
3973 * the server, this time with the input buf of the required size.
3974 */
16b4289c 3975static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3976{
bf118a34 3977 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3978 struct nfs_getaclargs args = {
3979 .fh = NFS_FH(inode),
3980 .acl_pages = pages,
3981 .acl_len = buflen,
3982 };
663c79b3
BH		 3983 struct nfs_getaclres res = {
3984 .acl_len = buflen,
3985 };
aa1870af
BF		 3986 struct rpc_message msg = {
3987 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3988 .rpc_argp = &args,
663c79b3 3989 .rpc_resp = &res,
aa1870af 3990 };
21f498c2
TM		 3991 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3992 int ret = -ENOMEM, i;
aa1870af 3993
bf118a34
AA		 3994 /* As long as we're doing a round trip to the server anyway,
3995 * let's be prepared for a page of acl data. */
3996 if (npages == 0)
3997 npages = 1;
21f498c2
TM		 3998 if (npages > ARRAY_SIZE(pages))
3999 return -ERANGE;
5a006899 4000
bf118a34
AA		 4001 for (i = 0; i < npages; i++) {
4002 pages[i] = alloc_page(GFP_KERNEL);
4003 if (!pages[i])
4004 goto out_free;
e50a1c2e 4005 }
5a006899
SP		 4006
4007 /* for decoding across pages */
4008 res.acl_scratch = alloc_page(GFP_KERNEL);
4009 if (!res.acl_scratch)
4010 goto out_free;
4011
bf118a34
AA		 4012 args.acl_len = npages * PAGE_SIZE;
4013 args.acl_pgbase = 0;
5a006899 4014
de040bec 4015 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4016 __func__, buf, buflen, npages, args.acl_len);
4017 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4018 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4019 if (ret)
4020 goto out_free;
bf118a34 4021
1f1ea6c2
TM		 4022 /* Handle the case where the passed-in buffer is too short */
4023 if (res.acl_flags & NFS4_ACL_TRUNC) {
4024 /* Did the user only issue a request for the acl length? */
4025 if (buf == NULL)
4026 goto out_ok;
e50a1c2e 4027 ret = -ERANGE;
1f1ea6c2 4028 goto out_free;
e50a1c2e 4029 }
1f1ea6c2 4030 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4031 if (buf) {
4032 if (res.acl_len > buflen) {
4033 ret = -ERANGE;
4034 goto out_free;
4035 }
1f1ea6c2 4036 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4037 }
1f1ea6c2
TM		 4038out_ok:
4039 ret = res.acl_len;
e50a1c2e 4040out_free:
bf118a34
AA		 4041 for (i = 0; i < npages; i++)
4042 if (pages[i])
4043 __free_page(pages[i]);
331818f1
TM		 4044 if (res.acl_scratch)
4045 __free_page(res.acl_scratch);
aa1870af
BF		 4046 return ret;
4047}
4048
16b4289c
TM		 4049static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4050{
4051 struct nfs4_exception exception = { };
4052 ssize_t ret;
4053 do {
4054 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4055 if (ret >= 0)
4056 break;
4057 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4058 } while (exception.retry);
4059 return ret;
4060}
4061
e50a1c2e
BF		 4062static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4063{
4064 struct nfs_server *server = NFS_SERVER(inode);
4065 int ret;
4066
4067 if (!nfs4_server_supports_acls(server))
4068 return -EOPNOTSUPP;
4069 ret = nfs_revalidate_inode(server, inode);
4070 if (ret < 0)
4071 return ret;
08a22b39
AK		 4072 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4073 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4074 ret = nfs4_read_cached_acl(inode, buf, buflen);
4075 if (ret != -ENOENT)
bf118a34
AA		 4076 /* -ENOENT is returned if there is no ACL or if there is an ACL
4077 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4078 return ret;
4079 return nfs4_get_acl_uncached(inode, buf, buflen);
4080}
4081
16b4289c 4082static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4083{
4084 struct nfs_server *server = NFS_SERVER(inode);
4085 struct page *pages[NFS4ACL_MAXPAGES];
4086 struct nfs_setaclargs arg = {
4087 .fh = NFS_FH(inode),
4088 .acl_pages = pages,
4089 .acl_len = buflen,
4090 };
73c403a9 4091 struct nfs_setaclres res;
4b580ee3
BF		 4092 struct rpc_message msg = {
4093 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4094 .rpc_argp = &arg,
73c403a9 4095 .rpc_resp = &res,
4b580ee3 4096 };
21f498c2 4097 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4098 int ret, i;
4b580ee3
BF		 4099
4100 if (!nfs4_server_supports_acls(server))
4101 return -EOPNOTSUPP;
21f498c2
TM		 4102 if (npages > ARRAY_SIZE(pages))
4103 return -ERANGE;
e9e3d724
NH		 4104 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4105 if (i < 0)
4106 return i;
57ec14c5 4107 nfs4_inode_return_delegation(inode);
7c513058 4108 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4109
4110 /*
4111 * Free each page after tx, so the only ref left is
4112 * held by the network stack
4113 */
4114 for (; i > 0; i--)
4115 put_page(pages[i-1]);
4116
08a22b39
AK		 4117 /*
4118 * Acl update can result in inode attribute update.
4119 * so mark the attribute cache invalid.
4120 */
4121 spin_lock(&inode->i_lock);
4122 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4123 spin_unlock(&inode->i_lock);
f41f7418
TM		 4124 nfs_access_zap_cache(inode);
4125 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4126 return ret;
4127}
4128
16b4289c
TM		 4129static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4130{
4131 struct nfs4_exception exception = { };
4132 int err;
4133 do {
4134 err = nfs4_handle_exception(NFS_SERVER(inode),
4135 __nfs4_proc_set_acl(inode, buf, buflen),
4136 &exception);
4137 } while (exception.retry);
4138 return err;
4139}
4140
1da177e4 4141static int
aa5190d0 4142nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4143{
aa5190d0
TM		 4144 struct nfs_client *clp = server->nfs_client;
4145
4146 if (task->tk_status >= 0)
1da177e4
LT		 4147 return 0;
4148 switch(task->tk_status) {
a1d0b5ee 4149 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4150 case -NFS4ERR_ADMIN_REVOKED:
4151 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4152 if (state == NULL)
4153 break;
4154 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4155 case -NFS4ERR_OPENMODE:
4156 if (state == NULL)
4157 break;
5d422301
TM		 4158 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4159 goto stateid_invalid;
0400a6b0 4160 goto wait_on_recovery;
0ced63d1 4161 case -NFS4ERR_EXPIRED:
5d422301
TM		 4162 if (state != NULL) {
4163 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4164 goto stateid_invalid;
4165 }
1da177e4 4166 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4167 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4168 nfs4_schedule_lease_recovery(clp);
4169 goto wait_on_recovery;
4745e315
AA		 4170#if defined(CONFIG_NFS_V4_1)
4171 case -NFS4ERR_BADSESSION:
4172 case -NFS4ERR_BADSLOT:
4173 case -NFS4ERR_BAD_HIGH_SLOT:
4174 case -NFS4ERR_DEADSESSION:
4175 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4176 case -NFS4ERR_SEQ_FALSE_RETRY:
4177 case -NFS4ERR_SEQ_MISORDERED:
4178 dprintk("%s ERROR %d, Reset session\n", __func__,
4179 task->tk_status);
9f594791 4180 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4181 task->tk_status = 0;
4182 return -EAGAIN;
4183#endif /* CONFIG_NFS_V4_1 */
1da177e4 4184 case -NFS4ERR_DELAY:
aa5190d0 4185 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4186 case -NFS4ERR_GRACE:
1da177e4
LT		 4187 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4188 task->tk_status = 0;
4189 return -EAGAIN;
a8a4ae3a 4190 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4191 case -NFS4ERR_OLD_STATEID:
4192 task->tk_status = 0;
4193 return -EAGAIN;
4194 }
4195 task->tk_status = nfs4_map_errors(task->tk_status);
4196 return 0;
5d422301
TM		 4197stateid_invalid:
4198 task->tk_status = -EIO;
4199 return 0;
0400a6b0 4200wait_on_recovery:
a2c0b9e2 4201 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4202 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4203 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4204 task->tk_status = 0;
4205 return -EAGAIN;
1da177e4
LT		 4206}
4207
f092075d
CL		 4208static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4209 nfs4_verifier *bootverf)
cd93710e
CL		 4210{
4211 __be32 verf[2];
4212
2c820d9a
CL		 4213 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4214 /* An impossible timestamp guarantees this value
4215 * will never match a generated boot time. */
4216 verf[0] = 0;
4217 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4218 } else {
f092075d
CL		 4219 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4220 verf[0] = (__be32)nn->boot_time.tv_sec;
4221 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4222 }
cd93710e
CL		 4223 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4224}
4225
e984a55a
CL		 4226static unsigned int
4227nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4228 char *buf, size_t len)
4229{
4230 unsigned int result;
4231
4232 rcu_read_lock();
4233 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4234 clp->cl_ipaddr,
4235 rpc_peeraddr2str(clp->cl_rpcclient,
4236 RPC_DISPLAY_ADDR),
4237 rpc_peeraddr2str(clp->cl_rpcclient,
4238 RPC_DISPLAY_PROTO));
4239 rcu_read_unlock();
4240 return result;
4241}
4242
4243static unsigned int
4244nfs4_init_uniform_client_string(const struct nfs_client *clp,
4245 char *buf, size_t len)
4246{
6f2ea7f2
CL		 4247 char *nodename = clp->cl_rpcclient->cl_nodename;
4248
4249 if (nfs4_client_id_uniquifier[0] != '\0')
4250 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4251 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4252 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4253 nodename);
e984a55a
CL		 4254}
4255
6bbb4ae8
CL		 4256/**
4257 * nfs4_proc_setclientid - Negotiate client ID
4258 * @clp: state data structure
4259 * @program: RPC program for NFSv4 callback service
4260 * @port: IP port number for NFS4 callback service
4261 * @cred: RPC credential to use for this call
4262 * @res: where to place the result
4263 *
4264 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4265 */
bb8b27e5
TM		 4266int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4267 unsigned short port, struct rpc_cred *cred,
4268 struct nfs4_setclientid_res *res)
1da177e4
LT		 4269{
4270 nfs4_verifier sc_verifier;
4271 struct nfs4_setclientid setclientid = {
4272 .sc_verifier = &sc_verifier,
4273 .sc_prog = program,
f4eecd5d 4274 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4275 };
4276 struct rpc_message msg = {
4277 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4278 .rpc_argp = &setclientid,
bb8b27e5 4279 .rpc_resp = res,
286d7d6a 4280 .rpc_cred = cred,
1da177e4 4281 };
6bbb4ae8 4282 int status;
1da177e4 4283
de734831 4284 /* nfs_client_id4 */
f092075d 4285 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4286 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4287 setclientid.sc_name_len =
4288 nfs4_init_uniform_client_string(clp,
4289 setclientid.sc_name,
4290 sizeof(setclientid.sc_name));
4291 else
4292 setclientid.sc_name_len =
4293 nfs4_init_nonuniform_client_string(clp,
4294 setclientid.sc_name,
4295 sizeof(setclientid.sc_name));
de734831 4296 /* cb_client4 */
e984a55a 4297 rcu_read_lock();
de734831 4298 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4299 sizeof(setclientid.sc_netid),
4300 rpc_peeraddr2str(clp->cl_rpcclient,
4301 RPC_DISPLAY_NETID));
de734831
CL		 4302 rcu_read_unlock();
4303 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4304 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4305 clp->cl_ipaddr, port >> 8, port & 255);
4306
6bbb4ae8
CL		 4307 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4308 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4309 setclientid.sc_name_len, setclientid.sc_name);
4310 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4311 dprintk("NFS reply setclientid: %d\n", status);
4312 return status;
1da177e4
LT		 4313}
4314
6bbb4ae8
CL		 4315/**
4316 * nfs4_proc_setclientid_confirm - Confirm client ID
4317 * @clp: state data structure
4318 * @res: result of a previous SETCLIENTID
4319 * @cred: RPC credential to use for this call
4320 *
4321 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4322 */
fd954ae1 4323int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4324 struct nfs4_setclientid_res *arg,
4325 struct rpc_cred *cred)
1da177e4
LT		 4326{
4327 struct nfs_fsinfo fsinfo;
4328 struct rpc_message msg = {
4329 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4330 .rpc_argp = arg,
1da177e4 4331 .rpc_resp = &fsinfo,
286d7d6a 4332 .rpc_cred = cred,
1da177e4
LT		 4333 };
4334 unsigned long now;
4335 int status;
4336
6bbb4ae8
CL		 4337 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4338 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4339 clp->cl_clientid);
1da177e4 4340 now = jiffies;
1bd714f2 4341 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4342 if (status == 0) {
4343 spin_lock(&clp->cl_lock);
4344 clp->cl_lease_time = fsinfo.lease_time * HZ;
4345 clp->cl_last_renewal = now;
4346 spin_unlock(&clp->cl_lock);
4347 }
6bbb4ae8 4348 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4349 return status;
4350}
4351
fe650407
TM		 4352struct nfs4_delegreturndata {
4353 struct nfs4_delegreturnargs args;
fa178f29 4354 struct nfs4_delegreturnres res;
fe650407
TM		 4355 struct nfs_fh fh;
4356 nfs4_stateid stateid;
26e976a8 4357 unsigned long timestamp;
fa178f29 4358 struct nfs_fattr fattr;
fe650407
TM		 4359 int rpc_status;
4360};
4361
fe650407
TM		 4362static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4363{
4364 struct nfs4_delegreturndata *data = calldata;
938e1010 4365
14516c3a
TM		 4366 if (!nfs4_sequence_done(task, &data->res.seq_res))
4367 return;
938e1010 4368
79708861
RL		 4369 switch (task->tk_status) {
4370 case -NFS4ERR_STALE_STATEID:
4371 case -NFS4ERR_EXPIRED:
4372 case 0:
fa178f29 4373 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4374 break;
4375 default:
4376 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4377 -EAGAIN) {
d00c5d43 4378 rpc_restart_call_prepare(task);
79708861
RL		 4379 return;
4380 }
4381 }
4382 data->rpc_status = task->tk_status;
fe650407
TM		 4383}
4384
4385static void nfs4_delegreturn_release(void *calldata)
4386{
fe650407
TM		 4387 kfree(calldata);
4388}
4389
938e1010
AA		 4390#if defined(CONFIG_NFS_V4_1)
4391static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4392{
4393 struct nfs4_delegreturndata *d_data;
4394
4395 d_data = (struct nfs4_delegreturndata *)data;
4396
d9afbd1b
TM		 4397 nfs4_setup_sequence(d_data->res.server,
4398 &d_data->args.seq_args,
4399 &d_data->res.seq_res,
4400 task);
938e1010
AA		 4401}
4402#endif /* CONFIG_NFS_V4_1 */
4403
c8d149f3 4404static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4405#if defined(CONFIG_NFS_V4_1)
4406 .rpc_call_prepare = nfs4_delegreturn_prepare,
4407#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4408 .rpc_call_done = nfs4_delegreturn_done,
4409 .rpc_release = nfs4_delegreturn_release,
4410};
4411
e6f81075 4412static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4413{
4414 struct nfs4_delegreturndata *data;
fa178f29 4415 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4416 struct rpc_task *task;
5138fde0
TM		 4417 struct rpc_message msg = {
4418 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4419 .rpc_cred = cred,
4420 };
c970aa85
TM		 4421 struct rpc_task_setup task_setup_data = {
4422 .rpc_client = server->client,
5138fde0 4423 .rpc_message = &msg,
c970aa85
TM		 4424 .callback_ops = &nfs4_delegreturn_ops,
4425 .flags = RPC_TASK_ASYNC,
4426 };
e6f81075 4427 int status = 0;
fe650407 4428
8535b2be 4429 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4430 if (data == NULL)
4431 return -ENOMEM;
9d12b216 4432 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4433 data->args.fhandle = &data->fh;
4434 data->args.stateid = &data->stateid;
9e907fec 4435 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4436 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4437 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4438 data->res.fattr = &data->fattr;
4439 data->res.server = server;
5138fde0 4440 nfs_fattr_init(data->res.fattr);
26e976a8 4441 data->timestamp = jiffies;
fe650407
TM		 4442 data->rpc_status = 0;
4443
c970aa85 4444 task_setup_data.callback_data = data;
1174dd1f
TM		 4445 msg.rpc_argp = &data->args;
4446 msg.rpc_resp = &data->res;
c970aa85 4447 task = rpc_run_task(&task_setup_data);
7a1218a2 4448 if (IS_ERR(task))
fe650407 4449 return PTR_ERR(task);
e6f81075
TM		 4450 if (!issync)
4451 goto out;
fe650407 4452 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4453 if (status != 0)
4454 goto out;
4455 status = data->rpc_status;
e144cbcc
TM		 4456 if (status == 0)
4457 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4458 else
4459 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4460out:
e6b3c4db 4461 rpc_put_task(task);
fe650407 4462 return status;
1da177e4
LT		 4463}
4464
e6f81075 4465int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4466{
4467 struct nfs_server *server = NFS_SERVER(inode);
4468 struct nfs4_exception exception = { };
4469 int err;
4470 do {
e6f81075 4471 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4472 switch (err) {
4473 case -NFS4ERR_STALE_STATEID:
4474 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4475 case 0:
4476 return 0;
4477 }
4478 err = nfs4_handle_exception(server, err, &exception);
4479 } while (exception.retry);
4480 return err;
4481}
4482
4483#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4484#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4485
4486/*
4487 * sleep, with exponential backoff, and retry the LOCK operation.
4488 */
4489static unsigned long
4490nfs4_set_lock_task_retry(unsigned long timeout)
4491{
d310310c 4492 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4493 timeout <<= 1;
4494 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4495 return NFS4_LOCK_MAXTIMEOUT;
4496 return timeout;
4497}
4498
1da177e4
LT		 4499static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4500{
4501 struct inode *inode = state->inode;
4502 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4503 struct nfs_client *clp = server->nfs_client;
911d1aaf 4504 struct nfs_lockt_args arg = {
1da177e4 4505 .fh = NFS_FH(inode),
911d1aaf 4506 .fl = request,
1da177e4 4507 };
911d1aaf
TM		 4508 struct nfs_lockt_res res = {
4509 .denied = request,
1da177e4
LT		 4510 };
4511 struct rpc_message msg = {
4512 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4513 .rpc_argp = &arg,
4514 .rpc_resp = &res,
4515 .rpc_cred = state->owner->so_cred,
4516 };
1da177e4
LT		 4517 struct nfs4_lock_state *lsp;
4518 int status;
4519
911d1aaf 4520 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4521 status = nfs4_set_lock_state(state, request);
4522 if (status != 0)
4523 goto out;
4524 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4525 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4526 arg.lock_owner.s_dev = server->s_dev;
7c513058 4527 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4528 switch (status) {
4529 case 0:
4530 request->fl_type = F_UNLCK;
4531 break;
4532 case -NFS4ERR_DENIED:
4533 status = 0;
1da177e4 4534 }
70cc6487 4535 request->fl_ops->fl_release_private(request);
8d0a8a9d 4536out:
1da177e4
LT		 4537 return status;
4538}
4539
4540static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4541{
4542 struct nfs4_exception exception = { };
4543 int err;
4544
4545 do {
4546 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4547 _nfs4_proc_getlk(state, cmd, request),
4548 &exception);
4549 } while (exception.retry);
4550 return err;
4551}
4552
4553static int do_vfs_lock(struct file *file, struct file_lock *fl)
4554{
4555 int res = 0;
4556 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4557 case FL_POSIX:
4558 res = posix_lock_file_wait(file, fl);
4559 break;
4560 case FL_FLOCK:
4561 res = flock_lock_file_wait(file, fl);
4562 break;
4563 default:
4564 BUG();
4565 }
1da177e4
LT		 4566 return res;
4567}
4568
faf5f49c 4569struct nfs4_unlockdata {
911d1aaf
TM		 4570 struct nfs_locku_args arg;
4571 struct nfs_locku_res res;
faf5f49c
TM		 4572 struct nfs4_lock_state *lsp;
4573 struct nfs_open_context *ctx;
911d1aaf
TM		 4574 struct file_lock fl;
4575 const struct nfs_server *server;
26e976a8 4576 unsigned long timestamp;
faf5f49c
TM		 4577};
4578
911d1aaf
TM		 4579static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4580 struct nfs_open_context *ctx,
4581 struct nfs4_lock_state *lsp,
4582 struct nfs_seqid *seqid)
4583{
4584 struct nfs4_unlockdata *p;
4585 struct inode *inode = lsp->ls_state->inode;
4586
8535b2be 4587 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4588 if (p == NULL)
4589 return NULL;
4590 p->arg.fh = NFS_FH(inode);
4591 p->arg.fl = &p->fl;
4592 p->arg.seqid = seqid;
c1d51931 4593 p->res.seqid = seqid;
911d1aaf
TM		 4594 p->arg.stateid = &lsp->ls_stateid;
4595 p->lsp = lsp;
4596 atomic_inc(&lsp->ls_count);
4597 /* Ensure we don't close file until we're done freeing locks! */
4598 p->ctx = get_nfs_open_context(ctx);
4599 memcpy(&p->fl, fl, sizeof(p->fl));
4600 p->server = NFS_SERVER(inode);
4601 return p;
4602}
4603
06f814a3 4604static void nfs4_locku_release_calldata(void *data)
faf5f49c 4605{
963d8fe5 4606 struct nfs4_unlockdata *calldata = data;
911d1aaf 4607 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4608 nfs4_put_lock_state(calldata->lsp);
4609 put_nfs_open_context(calldata->ctx);
4610 kfree(calldata);
faf5f49c
TM		 4611}
4612
963d8fe5 4613static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4614{
963d8fe5 4615 struct nfs4_unlockdata *calldata = data;
faf5f49c 4616
14516c3a
TM		 4617 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4618 return;
faf5f49c
TM		 4619 switch (task->tk_status) {
4620 case 0:
f597c537
TM		 4621 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4622 &calldata->res.stateid);
26e976a8 4623 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4624 break;
9e33bed5
TM		 4625 case -NFS4ERR_BAD_STATEID:
4626 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4627 case -NFS4ERR_STALE_STATEID:
4628 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4629 break;
4630 default:
9e33bed5 4631 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4632 rpc_restart_call_prepare(task);
faf5f49c 4633 }
2b1bc308 4634 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4635}
4636
4ce70ada 4637static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4638{
4ce70ada 4639 struct nfs4_unlockdata *calldata = data;
faf5f49c 4640
911d1aaf 4641 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 4642 goto out_wait;
795a88c9 4643 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 4644 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 4645 goto out_no_action;
faf5f49c 4646 }
26e976a8 4647 calldata->timestamp = jiffies;
035168ab 4648 if (nfs4_setup_sequence(calldata->server,
a893693c 4649 &calldata->arg.seq_args,
2240a9e2
TM		 4650 &calldata->res.seq_res,
4651 task) != 0)
4652 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 4653 return;
4654out_no_action:
4655 task->tk_action = NULL;
4656out_wait:
4657 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4658}
4659
963d8fe5 4660static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4661 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4662 .rpc_call_done = nfs4_locku_done,
06f814a3 4663 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4664};
4665
a5d16a4d
TM		 4666static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4667 struct nfs_open_context *ctx,
4668 struct nfs4_lock_state *lsp,
4669 struct nfs_seqid *seqid)
4670{
4671 struct nfs4_unlockdata *data;
5138fde0
TM		 4672 struct rpc_message msg = {
4673 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4674 .rpc_cred = ctx->cred,
4675 };
c970aa85
TM		 4676 struct rpc_task_setup task_setup_data = {
4677 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4678 .rpc_message = &msg,
c970aa85 4679 .callback_ops = &nfs4_locku_ops,
101070ca 4680 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4681 .flags = RPC_TASK_ASYNC,
4682 };
a5d16a4d 4683
137d6aca
FF		 4684 /* Ensure this is an unlock - when canceling a lock, the
4685 * canceled lock is passed in, and it won't be an unlock.
4686 */
4687 fl->fl_type = F_UNLCK;
4688
a5d16a4d
TM		 4689 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4690 if (data == NULL) {
4691 nfs_free_seqid(seqid);
4692 return ERR_PTR(-ENOMEM);
4693 }
4694
9d12b216 4695 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4696 msg.rpc_argp = &data->arg;
4697 msg.rpc_resp = &data->res;
c970aa85
TM		 4698 task_setup_data.callback_data = data;
4699 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4700}
4701
faf5f49c
TM		 4702static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4703{
65b62a29
TM		 4704 struct inode *inode = state->inode;
4705 struct nfs4_state_owner *sp = state->owner;
4706 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 4707 struct nfs_seqid *seqid;
1da177e4 4708 struct nfs4_lock_state *lsp;
06f814a3
TM		 4709 struct rpc_task *task;
4710 int status = 0;
536ff0f8 4711 unsigned char fl_flags = request->fl_flags;
faf5f49c 4712
8d0a8a9d 4713 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4714 /* Unlock _before_ we do the RPC call */
4715 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 4716 /* Exclude nfs_delegation_claim_locks() */
4717 mutex_lock(&sp->so_delegreturn_mutex);
4718 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 4719 down_read(&nfsi->rwsem);
4720 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4721 up_read(&nfsi->rwsem);
65b62a29 4722 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 4723 goto out;
19e03c57
TM		 4724 }
4725 up_read(&nfsi->rwsem);
65b62a29 4726 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 4727 if (status != 0)
9b073574
TM		 4728 goto out;
4729 /* Is this a delegated lock? */
4730 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4731 goto out;
8d0a8a9d 4732 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4733 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4734 status = -ENOMEM;
911d1aaf 4735 if (seqid == NULL)
9b073574 4736 goto out;
cd3758e3 4737 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4738 status = PTR_ERR(task);
4739 if (IS_ERR(task))
9b073574 4740 goto out;
a5d16a4d 4741 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4742 rpc_put_task(task);
9b073574 4743out:
536ff0f8 4744 request->fl_flags = fl_flags;
1da177e4
LT		 4745 return status;
4746}
4747
a5d16a4d
TM		 4748struct nfs4_lockdata {
4749 struct nfs_lock_args arg;
4750 struct nfs_lock_res res;
4751 struct nfs4_lock_state *lsp;
4752 struct nfs_open_context *ctx;
4753 struct file_lock fl;
26e976a8 4754 unsigned long timestamp;
a5d16a4d
TM		 4755 int rpc_status;
4756 int cancelled;
66179efe 4757 struct nfs_server *server;
a5d16a4d
TM		 4758};
4759
4760static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4761 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4762 gfp_t gfp_mask)
1da177e4 4763{
a5d16a4d
TM		 4764 struct nfs4_lockdata *p;
4765 struct inode *inode = lsp->ls_state->inode;
1da177e4 4766 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4767
8535b2be 4768 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4769 if (p == NULL)
4770 return NULL;
4771
4772 p->arg.fh = NFS_FH(inode);
4773 p->arg.fl = &p->fl;
8535b2be 4774 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4775 if (p->arg.open_seqid == NULL)
4776 goto out_free;
8535b2be 4777 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4778 if (p->arg.lock_seqid == NULL)
2f74c0a0 4779 goto out_free_seqid;
a5d16a4d 4780 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4781 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4782 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4783 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4784 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4785 p->lsp = lsp;
66179efe 4786 p->server = server;
a5d16a4d
TM		 4787 atomic_inc(&lsp->ls_count);
4788 p->ctx = get_nfs_open_context(ctx);
4789 memcpy(&p->fl, fl, sizeof(p->fl));
4790 return p;
2f74c0a0
TM		 4791out_free_seqid:
4792 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4793out_free:
4794 kfree(p);
4795 return NULL;
4796}
4797
4798static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4799{
4800 struct nfs4_lockdata *data = calldata;
4801 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4802
3110ff80 4803 dprintk("%s: begin!\n", __func__);
2f74c0a0 4804 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 4805 goto out_wait;
a5d16a4d
TM		 4806 /* Do we need to do an open_to_lock_owner? */
4807 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4808 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4809 goto out_release_lock_seqid;
8fe72bac 4810 }
8e472f33 4811 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 4812 data->arg.new_lock_owner = 1;
c1d51931 4813 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4814 } else
4815 data->arg.new_lock_owner = 0;
5d422301
TM		 4816 if (!nfs4_valid_open_stateid(state)) {
4817 data->rpc_status = -EBADF;
4818 task->tk_action = NULL;
4819 goto out_release_open_seqid;
4820 }
26e976a8 4821 data->timestamp = jiffies;
035168ab
TM		 4822 if (nfs4_setup_sequence(data->server,
4823 &data->arg.seq_args,
2240a9e2 4824 &data->res.seq_res,
d9afbd1b 4825 task) == 0)
66179efe 4826 return;
5d422301 4827out_release_open_seqid:
2240a9e2
TM		 4828 nfs_release_seqid(data->arg.open_seqid);
4829out_release_lock_seqid:
4830 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 4831out_wait:
4832 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 4833 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4834}
4835
a5d16a4d
TM		 4836static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4837{
4838 struct nfs4_lockdata *data = calldata;
4839
3110ff80 4840 dprintk("%s: begin!\n", __func__);
a5d16a4d 4841
14516c3a
TM		 4842 if (!nfs4_sequence_done(task, &data->res.seq_res))
4843 return;
66179efe 4844
a5d16a4d 4845 data->rpc_status = task->tk_status;
a5d16a4d 4846 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4847 if (data->rpc_status == 0)
4848 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4849 else
4850 goto out;
4851 }
4852 if (data->rpc_status == 0) {
f597c537 4853 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4854 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4855 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4856 }
a5d16a4d 4857out:
3110ff80 4858 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4859}
4860
4861static void nfs4_lock_release(void *calldata)
4862{
4863 struct nfs4_lockdata *data = calldata;
4864
3110ff80 4865 dprintk("%s: begin!\n", __func__);
2f74c0a0 4866 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4867 if (data->cancelled != 0) {
4868 struct rpc_task *task;
4869 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4870 data->arg.lock_seqid);
4871 if (!IS_ERR(task))
bf294b41 4872 rpc_put_task_async(task);
3110ff80 4873 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4874 } else
4875 nfs_free_seqid(data->arg.lock_seqid);
4876 nfs4_put_lock_state(data->lsp);
4877 put_nfs_open_context(data->ctx);
4878 kfree(data);
3110ff80 4879 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4880}
4881
4882static const struct rpc_call_ops nfs4_lock_ops = {
4883 .rpc_call_prepare = nfs4_lock_prepare,
4884 .rpc_call_done = nfs4_lock_done,
4885 .rpc_release = nfs4_lock_release,
4886};
4887
2bee72a6
TM		 4888static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4889{
2bee72a6
TM		 4890 switch (error) {
4891 case -NFS4ERR_ADMIN_REVOKED:
4892 case -NFS4ERR_BAD_STATEID:
ecac799a 4893 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4894 if (new_lock_owner != 0 ||
795a88c9 4895 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4896 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4897 break;
4898 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4899 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4900 case -NFS4ERR_EXPIRED:
4901 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4902 };
4903}
4904
afe6c27c 4905static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4906{
4907 struct nfs4_lockdata *data;
4908 struct rpc_task *task;
5138fde0
TM		 4909 struct rpc_message msg = {
4910 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4911 .rpc_cred = state->owner->so_cred,
4912 };
c970aa85
TM		 4913 struct rpc_task_setup task_setup_data = {
4914 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4915 .rpc_message = &msg,
c970aa85 4916 .callback_ops = &nfs4_lock_ops,
101070ca 4917 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4918 .flags = RPC_TASK_ASYNC,
4919 };
a5d16a4d
TM		 4920 int ret;
4921
3110ff80 4922 dprintk("%s: begin!\n", __func__);
cd3758e3 4923 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4924 fl->fl_u.nfs4_fl.owner,
4925 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4926 if (data == NULL)
4927 return -ENOMEM;
4928 if (IS_SETLKW(cmd))
4929 data->arg.block = 1;
9d12b216 4930 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4931 msg.rpc_argp = &data->arg;
4932 msg.rpc_resp = &data->res;
c970aa85 4933 task_setup_data.callback_data = data;
8fe72bac
TM		 4934 if (recovery_type > NFS_LOCK_NEW) {
4935 if (recovery_type == NFS_LOCK_RECLAIM)
4936 data->arg.reclaim = NFS_LOCK_RECLAIM;
4937 nfs4_set_sequence_privileged(&data->arg.seq_args);
4938 }
c970aa85 4939 task = rpc_run_task(&task_setup_data);
7a1218a2 4940 if (IS_ERR(task))
a5d16a4d 4941 return PTR_ERR(task);
a5d16a4d
TM		 4942 ret = nfs4_wait_for_completion_rpc_task(task);
4943 if (ret == 0) {
4944 ret = data->rpc_status;
2bee72a6
TM		 4945 if (ret)
4946 nfs4_handle_setlk_error(data->server, data->lsp,
4947 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4948 } else
4949 data->cancelled = 1;
e6b3c4db 4950 rpc_put_task(task);
3110ff80 4951 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4952 return ret;
1da177e4
LT		 4953}
4954
4955static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4956{
202b50dc 4957 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4958 struct nfs4_exception exception = {
4959 .inode = state->inode,
4960 };
202b50dc
TM		 4961 int err;
4962
4963 do {
42a2d13e
TM		 4964 /* Cache the lock if possible... */
4965 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4966 return 0;
afe6c27c 4967 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4968 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4969 break;
4970 nfs4_handle_exception(server, err, &exception);
4971 } while (exception.retry);
4972 return err;
1da177e4
LT		 4973}
4974
4975static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4976{
202b50dc 4977 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4978 struct nfs4_exception exception = {
4979 .inode = state->inode,
4980 };
202b50dc
TM		 4981 int err;
4982
6bfc93ef
TM		 4983 err = nfs4_set_lock_state(state, request);
4984 if (err != 0)
4985 return err;
202b50dc 4986 do {
42a2d13e
TM		 4987 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4988 return 0;
afe6c27c 4989 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4990 switch (err) {
4991 default:
4992 goto out;
4993 case -NFS4ERR_GRACE:
4994 case -NFS4ERR_DELAY:
4995 nfs4_handle_exception(server, err, &exception);
4996 err = 0;
4997 }
202b50dc 4998 } while (exception.retry);
a9ed2e25 4999out:
202b50dc 5000 return err;
1da177e4
LT		 5001}
5002
f062eb6c 5003#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5004/**
5005 * nfs41_check_expired_locks - possibly free a lock stateid
5006 *
5007 * @state: NFSv4 state for an inode
5008 *
5009 * Returns NFS_OK if recovery for this stateid is now finished.
5010 * Otherwise a negative NFS4ERR value is returned.
5011 */
b01dd1d8 5012static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5013{
eb64cf96 5014 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5015 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5016 struct nfs_server *server = NFS_SERVER(state->inode);
5017
b01dd1d8 5018 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5019 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 5020 status = nfs41_test_stateid(server, &lsp->ls_stateid);
5021 if (status != NFS_OK) {
3e60ffdd
CL		 5022 /* Free the stateid unless the server
5023 * informs us the stateid is unrecognized. */
89af2739
CL		 5024 if (status != -NFS4ERR_BAD_STATEID)
5025 nfs41_free_stateid(server,
5026 &lsp->ls_stateid);
795a88c9 5027 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5028 ret = status;
5029 }
5030 }
5031 };
5032
5033 return ret;
5034}
5035
5036static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5037{
5038 int status = NFS_OK;
5039
5040 if (test_bit(LK_STATE_IN_USE, &state->flags))
5041 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5042 if (status != NFS_OK)
5043 status = nfs4_lock_expired(state, request);
5044 return status;
f062eb6c
BS		 5045}
5046#endif
5047
1da177e4
LT		 5048static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5049{
9a99af49 5050 struct nfs4_state_owner *sp = state->owner;
19e03c57 5051 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5052 unsigned char fl_flags = request->fl_flags;
9a99af49 5053 unsigned int seq;
8e469ebd 5054 int status = -ENOLCK;
1da177e4 5055
8e469ebd
TM		 5056 if ((fl_flags & FL_POSIX) &&
5057 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5058 goto out;
6bfc93ef 5059 /* Is this a delegated open? */
6bfc93ef
TM		 5060 status = nfs4_set_lock_state(state, request);
5061 if (status != 0)
5062 goto out;
01c3b861
TM		 5063 request->fl_flags |= FL_ACCESS;
5064 status = do_vfs_lock(request->fl_file, request);
5065 if (status < 0)
5066 goto out;
19e03c57 5067 down_read(&nfsi->rwsem);
01c3b861 5068 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5069 /* Yes: cache locks! */
01c3b861 5070 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5071 request->fl_flags = fl_flags & ~FL_SLEEP;
5072 status = do_vfs_lock(request->fl_file, request);
5073 goto out_unlock;
01c3b861 5074 }
9a99af49
TM		 5075 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5076 up_read(&nfsi->rwsem);
afe6c27c 5077 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5078 if (status != 0)
9a99af49
TM		 5079 goto out;
5080 down_read(&nfsi->rwsem);
5081 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5082 status = -NFS4ERR_DELAY;
01c3b861 5083 goto out_unlock;
9a99af49 5084 }
6bfc93ef 5085 /* Note: we always want to sleep here! */
01c3b861 5086 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5087 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5088 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5089 "manager!\n", __func__);
01c3b861 5090out_unlock:
19e03c57 5091 up_read(&nfsi->rwsem);
01c3b861
TM		 5092out:
5093 request->fl_flags = fl_flags;
1da177e4
LT		 5094 return status;
5095}
5096
5097static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5098{
a1d0b5ee
TM		 5099 struct nfs4_exception exception = {
5100 .state = state,
05ffe24f 5101 .inode = state->inode,
a1d0b5ee 5102 };
1da177e4
LT		 5103 int err;
5104
5105 do {
965b5d67
TM		 5106 err = _nfs4_proc_setlk(state, cmd, request);
5107 if (err == -NFS4ERR_DENIED)
5108 err = -EAGAIN;
1da177e4 5109 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5110 err, &exception);
1da177e4
LT		 5111 } while (exception.retry);
5112 return err;
5113}
5114
5115static int
5116nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5117{
5118 struct nfs_open_context *ctx;
5119 struct nfs4_state *state;
5120 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5121 int status;
5122
5123 /* verify open state */
cd3758e3 5124 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5125 state = ctx->state;
5126
5127 if (request->fl_start < 0 || request->fl_end < 0)
5128 return -EINVAL;
5129
d953126a
TM		 5130 if (IS_GETLK(cmd)) {
5131 if (state != NULL)
5132 return nfs4_proc_getlk(state, F_GETLK, request);
5133 return 0;
5134 }
1da177e4
LT		 5135
5136 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5137 return -EINVAL;
5138
d953126a
TM		 5139 if (request->fl_type == F_UNLCK) {
5140 if (state != NULL)
5141 return nfs4_proc_unlck(state, cmd, request);
5142 return 0;
5143 }
1da177e4 5144
d953126a
TM		 5145 if (state == NULL)
5146 return -ENOLCK;
55725513
TM		 5147 /*
5148 * Don't rely on the VFS having checked the file open mode,
5149 * since it won't do this for flock() locks.
5150 */
f44106e2 5151 switch (request->fl_type) {
55725513
TM		 5152 case F_RDLCK:
5153 if (!(filp->f_mode & FMODE_READ))
5154 return -EBADF;
5155 break;
5156 case F_WRLCK:
5157 if (!(filp->f_mode & FMODE_WRITE))
5158 return -EBADF;
5159 }
5160
1da177e4
LT		 5161 do {
5162 status = nfs4_proc_setlk(state, cmd, request);
5163 if ((status != -EAGAIN) || IS_SETLK(cmd))
5164 break;
5165 timeout = nfs4_set_lock_task_retry(timeout);
5166 status = -ERESTARTSYS;
5167 if (signalled())
5168 break;
5169 } while(status < 0);
1da177e4
LT		 5170 return status;
5171}
5172
db4f2e63 5173int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5174{
5175 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5176 int err;
5177
5178 err = nfs4_set_lock_state(state, fl);
5179 if (err != 0)
db4f2e63 5180 return err;
4a706fa0 5181 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5182 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5183}
6b3b5496 5184
cf470c3e
TM		 5185struct nfs_release_lockowner_data {
5186 struct nfs4_lock_state *lsp;
5ae67c4f 5187 struct nfs_server *server;
cf470c3e
TM		 5188 struct nfs_release_lockowner_args args;
5189};
5190
d3c7b7cc
TM		 5191static void nfs4_release_lockowner_release(void *calldata)
5192{
cf470c3e 5193 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5194 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5195 kfree(calldata);
5196}
5197
17280175 5198static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5199 .rpc_release = nfs4_release_lockowner_release,
5200};
5201
cf470c3e 5202int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 5203{
5204 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 5205 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5206 struct rpc_message msg = {
5207 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5208 };
5209
5210 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5211 return -EINVAL;
5212 data = kmalloc(sizeof(*data), GFP_NOFS);
5213 if (!data)
5214 return -ENOMEM;
5215 data->lsp = lsp;
5ae67c4f 5216 data->server = server;
cf470c3e
TM		 5217 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5218 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5219 data->args.lock_owner.s_dev = server->s_dev;
5220 msg.rpc_argp = &data->args;
5221 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5222 return 0;
d3c7b7cc
TM		 5223}
5224
aa1870af
BF		 5225#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5226
64c2ce8b
AK		 5227static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5228 const void *buf, size_t buflen,
5229 int flags, int type)
6b3b5496 5230{
64c2ce8b
AK		 5231 if (strcmp(key, "") != 0)
5232 return -EINVAL;
4b580ee3 5233
64c2ce8b 5234 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5235}
5236
64c2ce8b
AK		 5237static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5238 void *buf, size_t buflen, int type)
6b3b5496 5239{
64c2ce8b
AK		 5240 if (strcmp(key, "") != 0)
5241 return -EINVAL;
aa1870af 5242
64c2ce8b 5243 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5244}
5245
64c2ce8b
AK		 5246static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5247 size_t list_len, const char *name,
5248 size_t name_len, int type)
6b3b5496 5249{
64c2ce8b 5250 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5251
096455a2
BF		 5252 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5253 return 0;
64c2ce8b
AK		 5254
5255 if (list && len <= list_len)
5256 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5257 return len;
6b3b5496
BF		 5258}
5259
533eb461
AA		 5260/*
5261 * nfs_fhget will use either the mounted_on_fileid or the fileid
5262 */
69aaaae1
TM		 5263static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5264{
533eb461
AA		 5265 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5266 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5267 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5268 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5269 return;
5270
5271 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5272 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5273 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5274 fattr->nlink = 2;
5275}
5276
f05d147f
BS		 5277static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5278 const struct qstr *name,
5279 struct nfs4_fs_locations *fs_locations,
5280 struct page *page)
683b57b4
TM		 5281{
5282 struct nfs_server *server = NFS_SERVER(dir);
5283 u32 bitmask[2] = {
361e624f 5284 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5285 };
5286 struct nfs4_fs_locations_arg args = {
5287 .dir_fh = NFS_FH(dir),
c228fd3a 5288 .name = name,
683b57b4
TM		 5289 .page = page,
5290 .bitmask = bitmask,
5291 };
22958463
BH		 5292 struct nfs4_fs_locations_res res = {
5293 .fs_locations = fs_locations,
5294 };
683b57b4
TM		 5295 struct rpc_message msg = {
5296 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5297 .rpc_argp = &args,
22958463 5298 .rpc_resp = &res,
683b57b4
TM		 5299 };
5300 int status;
5301
3110ff80 5302 dprintk("%s: start\n", __func__);
533eb461
AA		 5303
5304 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5305 * is not supported */
5306 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5307 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5308 else
5309 bitmask[0] |= FATTR4_WORD0_FILEID;
5310
c228fd3a 5311 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5312 fs_locations->server = server;
830b8e33 5313 fs_locations->nlocations = 0;
f05d147f 5314 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5315 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5316 return status;
5317}
5318
f05d147f
BS		 5319int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5320 const struct qstr *name,
5321 struct nfs4_fs_locations *fs_locations,
5322 struct page *page)
db0a9593
BS		 5323{
5324 struct nfs4_exception exception = { };
5325 int err;
5326 do {
5327 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5328 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5329 &exception);
5330 } while (exception.retry);
5331 return err;
5332}
5333
5a5ea0d4
BS		 5334static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5335{
5336 int status;
5337 struct nfs4_secinfo_arg args = {
5338 .dir_fh = NFS_FH(dir),
5339 .name = name,
5340 };
5341 struct nfs4_secinfo_res res = {
5342 .flavors = flavors,
5343 };
5344 struct rpc_message msg = {
5345 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5346 .rpc_argp = &args,
5347 .rpc_resp = &res,
5348 };
5349
5350 dprintk("NFS call secinfo %s\n", name->name);
5351 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5352 dprintk("NFS reply secinfo: %d\n", status);
5353 return status;
5354}
5355
72de53ec
BS		 5356int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5357 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5358{
5359 struct nfs4_exception exception = { };
5360 int err;
5361 do {
5362 err = nfs4_handle_exception(NFS_SERVER(dir),
5363 _nfs4_proc_secinfo(dir, name, flavors),
5364 &exception);
5365 } while (exception.retry);
5366 return err;
5367}
5368
557134a3 5369#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5370/*
5371 * Check the exchange flags returned by the server for invalid flags, having
5372 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5373 * DS flags set.
5374 */
5375static int nfs4_check_cl_exchange_flags(u32 flags)
5376{
5377 if (flags & ~EXCHGID4_FLAG_MASK_R)
5378 goto out_inval;
5379 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5380 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5381 goto out_inval;
5382 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5383 goto out_inval;
5384 return NFS_OK;
5385out_inval:
5386 return -NFS4ERR_INVAL;
5387}
5388
78fe0f41 5389static bool
79d4e1f0
CL		 5390nfs41_same_server_scope(struct nfs41_server_scope *a,
5391 struct nfs41_server_scope *b)
78fe0f41
WAA		 5392{
5393 if (a->server_scope_sz == b->server_scope_sz &&
5394 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5395 return true;
5396
5397 return false;
5398}
5399
7c44f1ae
WAA		 5400/*
5401 * nfs4_proc_bind_conn_to_session()
5402 *
5403 * The 4.1 client currently uses the same TCP connection for the
5404 * fore and backchannel.
5405 */
2cf047c9 5406int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5407{
5408 int status;
5409 struct nfs41_bind_conn_to_session_res res;
5410 struct rpc_message msg = {
5411 .rpc_proc =
5412 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5413 .rpc_argp = clp,
5414 .rpc_resp = &res,
2cf047c9 5415 .rpc_cred = cred,
7c44f1ae
WAA		 5416 };
5417
5418 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5419
5420 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5421 if (unlikely(res.session == NULL)) {
5422 status = -ENOMEM;
5423 goto out;
5424 }
5425
5426 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5427 if (status == 0) {
5428 if (memcmp(res.session->sess_id.data,
5429 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5430 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5431 status = -EIO;
5432 goto out_session;
5433 }
5434 if (res.dir != NFS4_CDFS4_BOTH) {
5435 dprintk("NFS: %s: Unexpected direction from server\n",
5436 __func__);
5437 status = -EIO;
5438 goto out_session;
5439 }
5440 if (res.use_conn_in_rdma_mode) {
5441 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5442 __func__);
5443 status = -EIO;
5444 goto out_session;
5445 }
5446 }
5447out_session:
5448 kfree(res.session);
5449out:
5450 dprintk("<-- %s status= %d\n", __func__, status);
5451 return status;
5452}
5453
99fe60d0
BH		 5454/*
5455 * nfs4_proc_exchange_id()
5456 *
6bbb4ae8
CL		 5457 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5458 *
99fe60d0
BH		 5459 * Since the clientid has expired, all compounds using sessions
5460 * associated with the stale clientid will be returning
5461 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5462 * be in some phase of session reset.
5463 */
4d643d1d 5464int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5465{
5466 nfs4_verifier verifier;
5467 struct nfs41_exchange_id_args args = {
cd93710e 5468 .verifier = &verifier,
99fe60d0 5469 .client = clp,
357f54d6 5470 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5471 };
5472 struct nfs41_exchange_id_res res = {
32b01310 5473 0
99fe60d0
BH		 5474 };
5475 int status;
5476 struct rpc_message msg = {
5477 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5478 .rpc_argp = &args,
5479 .rpc_resp = &res,
5480 .rpc_cred = cred,
5481 };
99fe60d0 5482
f092075d 5483 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5484 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5485 sizeof(args.id));
6bbb4ae8
CL		 5486 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5487 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5488 args.id_len, args.id);
99fe60d0 5489
acdeb69d 5490 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5491 GFP_NOFS);
acdeb69d 5492 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5493 status = -ENOMEM;
5494 goto out;
5495 }
78fe0f41 5496
79d4e1f0 5497 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5498 GFP_NOFS);
177313f1 5499 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5500 status = -ENOMEM;
acdeb69d 5501 goto out_server_owner;
abe9a6d5 5502 }
78fe0f41 5503
bbafffd2 5504 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5505 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5506 status = -ENOMEM;
5507 goto out_server_scope;
5508 }
5509
1bd714f2 5510 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5511 if (status == 0)
32b01310 5512 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5513
acdeb69d 5514 if (status == 0) {
32b01310
TM		 5515 clp->cl_clientid = res.clientid;
5516 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5517 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5518 clp->cl_seqid = res.seqid;
5519
acdeb69d
CL		 5520 kfree(clp->cl_serverowner);
5521 clp->cl_serverowner = res.server_owner;
5522 res.server_owner = NULL;
78fe0f41 5523
7d2ed9ac 5524 /* use the most recent implementation id */
59155546
CL		 5525 kfree(clp->cl_implid);
5526 clp->cl_implid = res.impl_id;
7d2ed9ac 5527
177313f1 5528 if (clp->cl_serverscope != NULL &&
79d4e1f0 5529 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5530 res.server_scope)) {
5531 dprintk("%s: server_scope mismatch detected\n",
5532 __func__);
5533 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5534 kfree(clp->cl_serverscope);
5535 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5536 }
5537
177313f1 5538 if (clp->cl_serverscope == NULL) {
79d4e1f0 5539 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5540 goto out;
5541 }
32b01310
TM		 5542 } else
5543 kfree(res.impl_id);
7d2ed9ac 5544
acdeb69d
CL		 5545out_server_owner:
5546 kfree(res.server_owner);
7d2ed9ac 5547out_server_scope:
abe9a6d5
WAA		 5548 kfree(res.server_scope);
5549out:
177313f1 5550 if (clp->cl_implid != NULL)
6bbb4ae8 5551 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5552 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5553 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5554 clp->cl_implid->date.seconds,
5555 clp->cl_implid->date.nseconds);
6bbb4ae8 5556 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5557 return status;
5558}
5559
66245539
TM		 5560static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5561 struct rpc_cred *cred)
5562{
5563 struct rpc_message msg = {
5564 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5565 .rpc_argp = clp,
5566 .rpc_cred = cred,
5567 };
5568 int status;
5569
5570 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5571 if (status)
02c67525 5572 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5573 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5574 return status;
5575}
5576
5577static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5578 struct rpc_cred *cred)
5579{
5580 unsigned int loop;
5581 int ret;
5582
5583 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5584 ret = _nfs4_proc_destroy_clientid(clp, cred);
5585 switch (ret) {
5586 case -NFS4ERR_DELAY:
5587 case -NFS4ERR_CLIENTID_BUSY:
5588 ssleep(1);
5589 break;
5590 default:
5591 return ret;
5592 }
5593 }
5594 return 0;
5595}
5596
5597int nfs4_destroy_clientid(struct nfs_client *clp)
5598{
5599 struct rpc_cred *cred;
5600 int ret = 0;
5601
5602 if (clp->cl_mvops->minor_version < 1)
5603 goto out;
5604 if (clp->cl_exchange_flags == 0)
5605 goto out;
05f4c350
CL		 5606 if (clp->cl_preserve_clid)
5607 goto out;
66245539
TM		 5608 cred = nfs4_get_exchange_id_cred(clp);
5609 ret = nfs4_proc_destroy_clientid(clp, cred);
5610 if (cred)
5611 put_rpccred(cred);
5612 switch (ret) {
5613 case 0:
5614 case -NFS4ERR_STALE_CLIENTID:
5615 clp->cl_exchange_flags = 0;
5616 }
5617out:
5618 return ret;
5619}
5620
2050f0cc
AA		 5621struct nfs4_get_lease_time_data {
5622 struct nfs4_get_lease_time_args *args;
5623 struct nfs4_get_lease_time_res *res;
5624 struct nfs_client *clp;
5625};
5626
5627static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5628 void *calldata)
5629{
2050f0cc
AA		 5630 struct nfs4_get_lease_time_data *data =
5631 (struct nfs4_get_lease_time_data *)calldata;
5632
5633 dprintk("--> %s\n", __func__);
5634 /* just setup sequence, do not trigger session recovery
5635 since we're invoked within one */
d9afbd1b
TM		 5636 nfs41_setup_sequence(data->clp->cl_session,
5637 &data->args->la_seq_args,
5638 &data->res->lr_seq_res,
5639 task);
2050f0cc
AA		 5640 dprintk("<-- %s\n", __func__);
5641}
5642
5643/*
5644 * Called from nfs4_state_manager thread for session setup, so don't recover
5645 * from sequence operation or clientid errors.
5646 */
5647static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5648{
5649 struct nfs4_get_lease_time_data *data =
5650 (struct nfs4_get_lease_time_data *)calldata;
5651
5652 dprintk("--> %s\n", __func__);
14516c3a
TM		 5653 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5654 return;
2050f0cc
AA		 5655 switch (task->tk_status) {
5656 case -NFS4ERR_DELAY:
5657 case -NFS4ERR_GRACE:
5658 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5659 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5660 task->tk_status = 0;
a8a4ae3a
AA		 5661 /* fall through */
5662 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5663 rpc_restart_call_prepare(task);
2050f0cc
AA		 5664 return;
5665 }
2050f0cc
AA		 5666 dprintk("<-- %s\n", __func__);
5667}
5668
17280175 5669static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5670 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5671 .rpc_call_done = nfs4_get_lease_time_done,
5672};
5673
5674int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5675{
5676 struct rpc_task *task;
5677 struct nfs4_get_lease_time_args args;
5678 struct nfs4_get_lease_time_res res = {
5679 .lr_fsinfo = fsinfo,
5680 };
5681 struct nfs4_get_lease_time_data data = {
5682 .args = &args,
5683 .res = &res,
5684 .clp = clp,
5685 };
5686 struct rpc_message msg = {
5687 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5688 .rpc_argp = &args,
5689 .rpc_resp = &res,
5690 };
5691 struct rpc_task_setup task_setup = {
5692 .rpc_client = clp->cl_rpcclient,
5693 .rpc_message = &msg,
5694 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5695 .callback_data = &data,
5696 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5697 };
5698 int status;
5699
9d12b216 5700 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5701 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5702 dprintk("--> %s\n", __func__);
5703 task = rpc_run_task(&task_setup);
5704
5705 if (IS_ERR(task))
5706 status = PTR_ERR(task);
5707 else {
5708 status = task->tk_status;
5709 rpc_put_task(task);
5710 }
5711 dprintk("<-- %s return %d\n", __func__, status);
5712
5713 return status;
5714}
5715
fc931582
AA		 5716/*
5717 * Initialize the values to be used by the client in CREATE_SESSION
5718 * If nfs4_init_session set the fore channel request and response sizes,
5719 * use them.
5720 *
5721 * Set the back channel max_resp_sz_cached to zero to force the client to
5722 * always set csa_cachethis to FALSE because the current implementation
5723 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5724 */
5725static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5726{
5727 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5728 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5729 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5730
5731 if (mxrqst_sz == 0)
5732 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5733 if (mxresp_sz == 0)
5734 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5735 /* Fore channel attributes */
fc931582
AA		 5736 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5737 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5738 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5739 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5740
5741 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5742 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5743 __func__,
5744 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5745 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5746
5747 /* Back channel attributes */
fc931582
AA		 5748 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5749 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5750 args->bc_attrs.max_resp_sz_cached = 0;
5751 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5752 args->bc_attrs.max_reqs = 1;
5753
5754 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5755 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5756 __func__,
5757 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5758 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5759 args->bc_attrs.max_reqs);
5760}
5761
43c2e885 5762static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5763{
43c2e885
BF		 5764 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5765 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5766
43c2e885
BF		 5767 if (rcvd->max_resp_sz > sent->max_resp_sz)
5768 return -EINVAL;
5769 /*
5770 * Our requested max_ops is the minimum we need; we're not
5771 * prepared to break up compounds into smaller pieces than that.
5772 * So, no point even trying to continue if the server won't
5773 * cooperate:
5774 */
5775 if (rcvd->max_ops < sent->max_ops)
5776 return -EINVAL;
5777 if (rcvd->max_reqs == 0)
5778 return -EINVAL;
b4b9a0c1
VG		 5779 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5780 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5781 return 0;
8d35301d
AA		 5782}
5783
43c2e885
BF		 5784static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5785{
5786 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5787 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5788
43c2e885
BF		 5789 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5790 return -EINVAL;
5791 if (rcvd->max_resp_sz < sent->max_resp_sz)
5792 return -EINVAL;
5793 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5794 return -EINVAL;
5795 /* These would render the backchannel useless: */
b4b9a0c1 5796 if (rcvd->max_ops != sent->max_ops)
43c2e885 5797 return -EINVAL;
b4b9a0c1 5798 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5799 return -EINVAL;
5800 return 0;
5801}
8d35301d 5802
8d35301d
AA		 5803static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5804 struct nfs4_session *session)
5805{
43c2e885 5806 int ret;
8d35301d 5807
43c2e885
BF		 5808 ret = nfs4_verify_fore_channel_attrs(args, session);
5809 if (ret)
5810 return ret;
5811 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5812}
5813
848f5bda
TM		 5814static int _nfs4_proc_create_session(struct nfs_client *clp,
5815 struct rpc_cred *cred)
fc931582
AA		 5816{
5817 struct nfs4_session *session = clp->cl_session;
5818 struct nfs41_create_session_args args = {
5819 .client = clp,
5820 .cb_program = NFS4_CALLBACK,
5821 };
5822 struct nfs41_create_session_res res = {
5823 .client = clp,
5824 };
5825 struct rpc_message msg = {
5826 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5827 .rpc_argp = &args,
5828 .rpc_resp = &res,
848f5bda 5829 .rpc_cred = cred,
fc931582
AA		 5830 };
5831 int status;
5832
5833 nfs4_init_channel_attrs(&args);
0f91421e 5834 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5835
1bd714f2 5836 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5837
43095d39 5838 if (!status) {
8d35301d
AA		 5839 /* Verify the session's negotiated channel_attrs values */
5840 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5841 /* Increment the clientid slot sequence id */
5842 clp->cl_seqid++;
5843 }
5844
5845 return status;
5846}
5847
5848/*
5849 * Issues a CREATE_SESSION operation to the server.
5850 * It is the responsibility of the caller to verify the session is
5851 * expired before calling this routine.
5852 */
848f5bda 5853int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5854{
5855 int status;
5856 unsigned *ptr;
fc931582
AA		 5857 struct nfs4_session *session = clp->cl_session;
5858
5859 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5860
848f5bda 5861 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5862 if (status)
5863 goto out;
5864
aacd5537
AA		 5865 /* Init or reset the session slot tables */
5866 status = nfs4_setup_session_slot_tables(session);
5867 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5868 if (status)
5869 goto out;
5870
5871 ptr = (unsigned *)&session->sess_id.data[0];
5872 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5873 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5874out:
5875 dprintk("<-- %s\n", __func__);
5876 return status;
5877}
5878
0f3e66c6
AA		 5879/*
5880 * Issue the over-the-wire RPC DESTROY_SESSION.
5881 * The caller must serialize access to this routine.
5882 */
848f5bda
TM		 5883int nfs4_proc_destroy_session(struct nfs4_session *session,
5884 struct rpc_cred *cred)
0f3e66c6 5885{
848f5bda
TM		 5886 struct rpc_message msg = {
5887 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5888 .rpc_argp = session,
5889 .rpc_cred = cred,
5890 };
0f3e66c6 5891 int status = 0;
0f3e66c6
AA		 5892
5893 dprintk("--> nfs4_proc_destroy_session\n");
5894
5895 /* session is still being setup */
5896 if (session->clp->cl_cons_state != NFS_CS_READY)
5897 return status;
5898
1bd714f2 5899 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5900
5901 if (status)
08106ac7 5902 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5903 "Session has been destroyed regardless...\n", status);
5904
5905 dprintk("<-- nfs4_proc_destroy_session\n");
5906 return status;
5907}
5908
fc01cea9
AA		 5909/*
5910 * Renew the cl_session lease.
5911 */
d5f8d3fe
TM		 5912struct nfs4_sequence_data {
5913 struct nfs_client *clp;
5914 struct nfs4_sequence_args args;
5915 struct nfs4_sequence_res res;
5916};
5917
dc96aef9
AB		 5918static void nfs41_sequence_release(void *data)
5919{
d5f8d3fe
TM		 5920 struct nfs4_sequence_data *calldata = data;
5921 struct nfs_client *clp = calldata->clp;
dc96aef9 5922
7135840f
AB		 5923 if (atomic_read(&clp->cl_count) > 1)
5924 nfs4_schedule_state_renewal(clp);
5925 nfs_put_client(clp);
d5f8d3fe 5926 kfree(calldata);
dc96aef9
AB		 5927}
5928
aa5190d0
TM		 5929static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5930{
5931 switch(task->tk_status) {
5932 case -NFS4ERR_DELAY:
aa5190d0
TM		 5933 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5934 return -EAGAIN;
5935 default:
0400a6b0 5936 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5937 }
5938 return 0;
5939}
5940
dc96aef9 5941static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5942{
d5f8d3fe
TM		 5943 struct nfs4_sequence_data *calldata = data;
5944 struct nfs_client *clp = calldata->clp;
fc01cea9 5945
14516c3a
TM		 5946 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5947 return;
fc01cea9
AA		 5948
5949 if (task->tk_status < 0) {
5950 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5951 if (atomic_read(&clp->cl_count) == 1)
5952 goto out;
fc01cea9 5953
aa5190d0
TM		 5954 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5955 rpc_restart_call_prepare(task);
fc01cea9
AA		 5956 return;
5957 }
5958 }
fc01cea9 5959 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5960out:
fc01cea9
AA		 5961 dprintk("<-- %s\n", __func__);
5962}
5963
5964static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5965{
d5f8d3fe
TM		 5966 struct nfs4_sequence_data *calldata = data;
5967 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5968 struct nfs4_sequence_args *args;
5969 struct nfs4_sequence_res *res;
5970
fc01cea9
AA		 5971 args = task->tk_msg.rpc_argp;
5972 res = task->tk_msg.rpc_resp;
5973
d9afbd1b 5974 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 5975}
5976
5977static const struct rpc_call_ops nfs41_sequence_ops = {
5978 .rpc_call_done = nfs41_sequence_call_done,
5979 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5980 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5981};
5982
8fe72bac
TM		 5983static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
5984 struct rpc_cred *cred,
5985 bool is_privileged)
fc01cea9 5986{
d5f8d3fe 5987 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5988 struct rpc_message msg = {
5989 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5990 .rpc_cred = cred,
5991 };
71ac6da9
TM		 5992 struct rpc_task_setup task_setup_data = {
5993 .rpc_client = clp->cl_rpcclient,
5994 .rpc_message = &msg,
8fe72bac 5995 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 5996 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 5997 };
fc01cea9 5998
7135840f 5999 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6000 return ERR_PTR(-EIO);
dfb4f309 6001 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6002 if (calldata == NULL) {
7135840f 6003 nfs_put_client(clp);
71ac6da9 6004 return ERR_PTR(-ENOMEM);
fc01cea9 6005 }
9d12b216 6006 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6007 if (is_privileged)
6008 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6009 msg.rpc_argp = &calldata->args;
6010 msg.rpc_resp = &calldata->res;
6011 calldata->clp = clp;
71ac6da9 6012 task_setup_data.callback_data = calldata;
fc01cea9 6013
71ac6da9
TM		 6014 return rpc_run_task(&task_setup_data);
6015}
6016
2f60ea6b 6017static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6018{
6019 struct rpc_task *task;
6020 int ret = 0;
6021
2f60ea6b
TM		 6022 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6023 return 0;
8fe72bac 6024 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6025 if (IS_ERR(task))
6026 ret = PTR_ERR(task);
6027 else
bf294b41 6028 rpc_put_task_async(task);
71ac6da9
TM		 6029 dprintk("<-- %s status=%d\n", __func__, ret);
6030 return ret;
6031}
6032
6033static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6034{
6035 struct rpc_task *task;
6036 int ret;
6037
8fe72bac 6038 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6039 if (IS_ERR(task)) {
6040 ret = PTR_ERR(task);
6041 goto out;
6042 }
6043 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6044 if (!ret) {
6045 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6046
6047 if (task->tk_status == 0)
6048 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6049 ret = task->tk_status;
b4410c2f 6050 }
71ac6da9
TM		 6051 rpc_put_task(task);
6052out:
6053 dprintk("<-- %s status=%d\n", __func__, ret);
6054 return ret;
fc01cea9
AA		 6055}
6056
fce5c838
RL		 6057struct nfs4_reclaim_complete_data {
6058 struct nfs_client *clp;
6059 struct nfs41_reclaim_complete_args arg;
6060 struct nfs41_reclaim_complete_res res;
6061};
6062
6063static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6064{
6065 struct nfs4_reclaim_complete_data *calldata = data;
6066
d9afbd1b
TM		 6067 nfs41_setup_sequence(calldata->clp->cl_session,
6068 &calldata->arg.seq_args,
6069 &calldata->res.seq_res,
6070 task);
fce5c838
RL		 6071}
6072
aa5190d0
TM		 6073static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6074{
6075 switch(task->tk_status) {
6076 case 0:
6077 case -NFS4ERR_COMPLETE_ALREADY:
6078 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6079 break;
6080 case -NFS4ERR_DELAY:
aa5190d0 6081 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6082 /* fall through */
6083 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6084 return -EAGAIN;
6085 default:
0400a6b0 6086 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6087 }
6088 return 0;
6089}
6090
fce5c838
RL		 6091static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6092{
6093 struct nfs4_reclaim_complete_data *calldata = data;
6094 struct nfs_client *clp = calldata->clp;
6095 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6096
6097 dprintk("--> %s\n", __func__);
14516c3a
TM		 6098 if (!nfs41_sequence_done(task, res))
6099 return;
fce5c838 6100
aa5190d0
TM		 6101 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6102 rpc_restart_call_prepare(task);
6103 return;
6104 }
fce5c838
RL		 6105 dprintk("<-- %s\n", __func__);
6106}
6107
6108static void nfs4_free_reclaim_complete_data(void *data)
6109{
6110 struct nfs4_reclaim_complete_data *calldata = data;
6111
6112 kfree(calldata);
6113}
6114
6115static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6116 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6117 .rpc_call_done = nfs4_reclaim_complete_done,
6118 .rpc_release = nfs4_free_reclaim_complete_data,
6119};
6120
6121/*
6122 * Issue a global reclaim complete.
6123 */
6124static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6125{
6126 struct nfs4_reclaim_complete_data *calldata;
6127 struct rpc_task *task;
6128 struct rpc_message msg = {
6129 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6130 };
6131 struct rpc_task_setup task_setup_data = {
6132 .rpc_client = clp->cl_rpcclient,
6133 .rpc_message = &msg,
6134 .callback_ops = &nfs4_reclaim_complete_call_ops,
6135 .flags = RPC_TASK_ASYNC,
6136 };
6137 int status = -ENOMEM;
6138
6139 dprintk("--> %s\n", __func__);
8535b2be 6140 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6141 if (calldata == NULL)
6142 goto out;
6143 calldata->clp = clp;
6144 calldata->arg.one_fs = 0;
fce5c838 6145
9d12b216 6146 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6147 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6148 msg.rpc_argp = &calldata->arg;
6149 msg.rpc_resp = &calldata->res;
6150 task_setup_data.callback_data = calldata;
6151 task = rpc_run_task(&task_setup_data);
acf82b85 6152 if (IS_ERR(task)) {
fce5c838 6153 status = PTR_ERR(task);
acf82b85
DC		 6154 goto out;
6155 }
c34c32ea
AA		 6156 status = nfs4_wait_for_completion_rpc_task(task);
6157 if (status == 0)
6158 status = task->tk_status;
fce5c838 6159 rpc_put_task(task);
acf82b85 6160 return 0;
fce5c838
RL		 6161out:
6162 dprintk("<-- %s status=%d\n", __func__, status);
6163 return status;
6164}
b1f69b75
AA		 6165
6166static void
6167nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6168{
6169 struct nfs4_layoutget *lgp = calldata;
c31663d4 6170 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6171 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6172
6173 dprintk("--> %s\n", __func__);
c31663d4
FI		 6174 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6175 * right now covering the LAYOUTGET we are about to send.
6176 * However, that is not so catastrophic, and there seems
6177 * to be no way to prevent it completely.
6178 */
6ba7db34 6179 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6180 &lgp->res.seq_res, task))
b1f69b75 6181 return;
cf7d63f1
FI		 6182 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6183 NFS_I(lgp->args.inode)->layout,
6184 lgp->args.ctx->state)) {
6185 rpc_exit(task, NFS4_OK);
cf7d63f1 6186 }
b1f69b75
AA		 6187}
6188
6189static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6190{
6191 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6192 struct inode *inode = lgp->args.inode;
6193 struct nfs_server *server = NFS_SERVER(inode);
6194 struct pnfs_layout_hdr *lo;
6195 struct nfs4_state *state = NULL;
30005121 6196 unsigned long timeo, giveup;
b1f69b75
AA		 6197
6198 dprintk("--> %s\n", __func__);
6199
6ba7db34 6200 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6201 goto out;
b1f69b75
AA		 6202
6203 switch (task->tk_status) {
6204 case 0:
ee314c2a 6205 goto out;
b1f69b75
AA		 6206 case -NFS4ERR_LAYOUTTRYLATER:
6207 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6208 timeo = rpc_get_timeout(task->tk_client);
6209 giveup = lgp->args.timestamp + timeo;
6210 if (time_after(giveup, jiffies))
6211 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6212 break;
6213 case -NFS4ERR_EXPIRED:
6214 case -NFS4ERR_BAD_STATEID:
6215 spin_lock(&inode->i_lock);
6216 lo = NFS_I(inode)->layout;
6217 if (!lo || list_empty(&lo->plh_segs)) {
6218 spin_unlock(&inode->i_lock);
6219 /* If the open stateid was bad, then recover it. */
6220 state = lgp->args.ctx->state;
6221 } else {
6222 LIST_HEAD(head);
6223
6224 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6225 spin_unlock(&inode->i_lock);
6226 /* Mark the bad layout state as invalid, then
6227 * retry using the open stateid. */
6228 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6229 }
6230 }
ee314c2a
TM		 6231 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6232 rpc_restart_call_prepare(task);
6233out:
b1f69b75
AA		 6234 dprintk("<-- %s\n", __func__);
6235}
6236
8554116e
IK		 6237static size_t max_response_pages(struct nfs_server *server)
6238{
6239 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6240 return nfs_page_array_len(0, max_resp_sz);
6241}
6242
6243static void nfs4_free_pages(struct page **pages, size_t size)
6244{
6245 int i;
6246
6247 if (!pages)
6248 return;
6249
6250 for (i = 0; i < size; i++) {
6251 if (!pages[i])
6252 break;
6253 __free_page(pages[i]);
6254 }
6255 kfree(pages);
6256}
6257
6258static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6259{
6260 struct page **pages;
6261 int i;
6262
6263 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6264 if (!pages) {
6265 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6266 return NULL;
6267 }
6268
6269 for (i = 0; i < size; i++) {
6270 pages[i] = alloc_page(gfp_flags);
6271 if (!pages[i]) {
6272 dprintk("%s: failed to allocate page\n", __func__);
6273 nfs4_free_pages(pages, size);
6274 return NULL;
6275 }
6276 }
6277
6278 return pages;
6279}
6280
b1f69b75
AA		 6281static void nfs4_layoutget_release(void *calldata)
6282{
6283 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6284 struct inode *inode = lgp->args.inode;
6285 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6286 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6287
6288 dprintk("--> %s\n", __func__);
8554116e 6289 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6290 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6291 put_nfs_open_context(lgp->args.ctx);
6292 kfree(calldata);
6293 dprintk("<-- %s\n", __func__);
6294}
6295
6296static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6297 .rpc_call_prepare = nfs4_layoutget_prepare,
6298 .rpc_call_done = nfs4_layoutget_done,
6299 .rpc_release = nfs4_layoutget_release,
6300};
6301
a0b0a6e3
TM		 6302struct pnfs_layout_segment *
6303nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6304{
a47970ff
WAA		 6305 struct inode *inode = lgp->args.inode;
6306 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6307 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6308 struct rpc_task *task;
6309 struct rpc_message msg = {
6310 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6311 .rpc_argp = &lgp->args,
6312 .rpc_resp = &lgp->res,
6313 };
6314 struct rpc_task_setup task_setup_data = {
6315 .rpc_client = server->client,
6316 .rpc_message = &msg,
6317 .callback_ops = &nfs4_layoutget_call_ops,
6318 .callback_data = lgp,
6319 .flags = RPC_TASK_ASYNC,
6320 };
a0b0a6e3 6321 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6322 int status = 0;
6323
6324 dprintk("--> %s\n", __func__);
6325
8554116e
IK		 6326 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6327 if (!lgp->args.layout.pages) {
6328 nfs4_layoutget_release(lgp);
a0b0a6e3 6329 return ERR_PTR(-ENOMEM);
8554116e
IK		 6330 }
6331 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6332 lgp->args.timestamp = jiffies;
8554116e 6333
35124a09 6334 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6335 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6336 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6337
6338 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6339 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6340
b1f69b75
AA		 6341 task = rpc_run_task(&task_setup_data);
6342 if (IS_ERR(task))
a0b0a6e3 6343 return ERR_CAST(task);
b1f69b75 6344 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6345 if (status == 0)
6346 status = task->tk_status;
085b7a45
WAA		 6347 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6348 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6349 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6350 rpc_put_task(task);
6351 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6352 if (status)
6353 return ERR_PTR(status);
6354 return lseg;
b1f69b75
AA		 6355}
6356
cbe82603
BH		 6357static void
6358nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6359{
6360 struct nfs4_layoutreturn *lrp = calldata;
6361
6362 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6363 nfs41_setup_sequence(lrp->clp->cl_session,
6364 &lrp->args.seq_args,
6365 &lrp->res.seq_res,
6366 task);
cbe82603
BH		 6367}
6368
6369static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6370{
6371 struct nfs4_layoutreturn *lrp = calldata;
6372 struct nfs_server *server;
6373
6374 dprintk("--> %s\n", __func__);
6375
6ba7db34 6376 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6377 return;
6378
6379 server = NFS_SERVER(lrp->args.inode);
6380 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6381 rpc_restart_call_prepare(task);
cbe82603
BH		 6382 return;
6383 }
cbe82603
BH		 6384 dprintk("<-- %s\n", __func__);
6385}
6386
6387static void nfs4_layoutreturn_release(void *calldata)
6388{
6389 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6390 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6391
6392 dprintk("--> %s\n", __func__);
849b286f
TM		 6393 spin_lock(&lo->plh_inode->i_lock);
6394 if (lrp->res.lrs_present)
6395 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6396 lo->plh_block_lgets--;
6397 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6398 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6399 kfree(calldata);
6400 dprintk("<-- %s\n", __func__);
6401}
6402
6403static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6404 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6405 .rpc_call_done = nfs4_layoutreturn_done,
6406 .rpc_release = nfs4_layoutreturn_release,
6407};
6408
6409int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6410{
6411 struct rpc_task *task;
6412 struct rpc_message msg = {
6413 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6414 .rpc_argp = &lrp->args,
6415 .rpc_resp = &lrp->res,
6416 };
6417 struct rpc_task_setup task_setup_data = {
6418 .rpc_client = lrp->clp->cl_rpcclient,
6419 .rpc_message = &msg,
6420 .callback_ops = &nfs4_layoutreturn_call_ops,
6421 .callback_data = lrp,
6422 };
6423 int status;
6424
6425 dprintk("--> %s\n", __func__);
9d12b216 6426 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6427 task = rpc_run_task(&task_setup_data);
6428 if (IS_ERR(task))
6429 return PTR_ERR(task);
6430 status = task->tk_status;
6431 dprintk("<-- %s status=%d\n", __func__, status);
6432 rpc_put_task(task);
6433 return status;
6434}
6435
7f11d8d3
AA		 6436/*
6437 * Retrieve the list of Data Server devices from the MDS.
6438 */
6439static int _nfs4_getdevicelist(struct nfs_server *server,
6440 const struct nfs_fh *fh,
6441 struct pnfs_devicelist *devlist)
6442{
6443 struct nfs4_getdevicelist_args args = {
6444 .fh = fh,
6445 .layoutclass = server->pnfs_curr_ld->id,
6446 };
6447 struct nfs4_getdevicelist_res res = {
6448 .devlist = devlist,
6449 };
6450 struct rpc_message msg = {
6451 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6452 .rpc_argp = &args,
6453 .rpc_resp = &res,
6454 };
6455 int status;
6456
6457 dprintk("--> %s\n", __func__);
6458 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6459 &res.seq_res, 0);
6460 dprintk("<-- %s status=%d\n", __func__, status);
6461 return status;
6462}
6463
6464int nfs4_proc_getdevicelist(struct nfs_server *server,
6465 const struct nfs_fh *fh,
6466 struct pnfs_devicelist *devlist)
6467{
6468 struct nfs4_exception exception = { };
6469 int err;
6470
6471 do {
6472 err = nfs4_handle_exception(server,
6473 _nfs4_getdevicelist(server, fh, devlist),
6474 &exception);
6475 } while (exception.retry);
6476
6477 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6478 err, devlist->num_devs);
6479
6480 return err;
6481}
6482EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6483
b1f69b75
AA		 6484static int
6485_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6486{
6487 struct nfs4_getdeviceinfo_args args = {
6488 .pdev = pdev,
6489 };
6490 struct nfs4_getdeviceinfo_res res = {
6491 .pdev = pdev,
6492 };
6493 struct rpc_message msg = {
6494 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6495 .rpc_argp = &args,
6496 .rpc_resp = &res,
6497 };
6498 int status;
6499
6500 dprintk("--> %s\n", __func__);
7c513058 6501 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6502 dprintk("<-- %s status=%d\n", __func__, status);
6503
6504 return status;
6505}
6506
6507int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6508{
6509 struct nfs4_exception exception = { };
6510 int err;
6511
6512 do {
6513 err = nfs4_handle_exception(server,
6514 _nfs4_proc_getdeviceinfo(server, pdev),
6515 &exception);
6516 } while (exception.retry);
6517 return err;
6518}
6519EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6520
863a3c6c
AA		 6521static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6522{
6523 struct nfs4_layoutcommit_data *data = calldata;
6524 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6525 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6526
d9afbd1b
TM		 6527 nfs41_setup_sequence(session,
6528 &data->args.seq_args,
6529 &data->res.seq_res,
6530 task);
863a3c6c
AA		 6531}
6532
6533static void
6534nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6535{
6536 struct nfs4_layoutcommit_data *data = calldata;
6537 struct nfs_server *server = NFS_SERVER(data->args.inode);
6538
6ba7db34 6539 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6540 return;
6541
6542 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6543 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6544 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6545 case -NFS4ERR_BADLAYOUT: /* no layout */
6546 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6547 task->tk_status = 0;
e59d27e0
TM		 6548 break;
6549 case 0:
863a3c6c
AA		 6550 nfs_post_op_update_inode_force_wcc(data->args.inode,
6551 data->res.fattr);
e59d27e0
TM		 6552 break;
6553 default:
6554 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6555 rpc_restart_call_prepare(task);
6556 return;
6557 }
6558 }
863a3c6c
AA		 6559}
6560
6561static void nfs4_layoutcommit_release(void *calldata)
6562{
6563 struct nfs4_layoutcommit_data *data = calldata;
6564
db29c089 6565 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 6566 put_rpccred(data->cred);
6567 kfree(data);
6568}
6569
6570static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6571 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6572 .rpc_call_done = nfs4_layoutcommit_done,
6573 .rpc_release = nfs4_layoutcommit_release,
6574};
6575
6576int
ef311537 6577nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6578{
6579 struct rpc_message msg = {
6580 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6581 .rpc_argp = &data->args,
6582 .rpc_resp = &data->res,
6583 .rpc_cred = data->cred,
6584 };
6585 struct rpc_task_setup task_setup_data = {
6586 .task = &data->task,
6587 .rpc_client = NFS_CLIENT(data->args.inode),
6588 .rpc_message = &msg,
6589 .callback_ops = &nfs4_layoutcommit_ops,
6590 .callback_data = data,
6591 .flags = RPC_TASK_ASYNC,
6592 };
6593 struct rpc_task *task;
6594 int status = 0;
6595
6596 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6597 "lbw: %llu inode %lu\n",
6598 data->task.tk_pid, sync,
6599 data->args.lastbytewritten,
6600 data->args.inode->i_ino);
6601
9d12b216 6602 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6603 task = rpc_run_task(&task_setup_data);
6604 if (IS_ERR(task))
6605 return PTR_ERR(task);
ef311537 6606 if (sync == false)
863a3c6c
AA		 6607 goto out;
6608 status = nfs4_wait_for_completion_rpc_task(task);
6609 if (status != 0)
6610 goto out;
6611 status = task->tk_status;
6612out:
6613 dprintk("%s: status %d\n", __func__, status);
6614 rpc_put_task(task);
6615 return status;
6616}
fca78d6d
BS		 6617
6618static int
6619_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6620 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6621{
6622 struct nfs41_secinfo_no_name_args args = {
6623 .style = SECINFO_STYLE_CURRENT_FH,
6624 };
6625 struct nfs4_secinfo_res res = {
6626 .flavors = flavors,
6627 };
6628 struct rpc_message msg = {
6629 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6630 .rpc_argp = &args,
6631 .rpc_resp = &res,
6632 };
6633 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6634}
6635
6636static int
6637nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6638 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6639{
6640 struct nfs4_exception exception = { };
6641 int err;
6642 do {
6643 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6644 switch (err) {
6645 case 0:
6646 case -NFS4ERR_WRONGSEC:
6647 case -NFS4ERR_NOTSUPP:
05e9cfb4 6648 goto out;
fca78d6d
BS		 6649 default:
6650 err = nfs4_handle_exception(server, err, &exception);
6651 }
6652 } while (exception.retry);
05e9cfb4 6653out:
fca78d6d
BS		 6654 return err;
6655}
6656
6657static int
6658nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6659 struct nfs_fsinfo *info)
6660{
6661 int err;
6662 struct page *page;
6663 rpc_authflavor_t flavor;
6664 struct nfs4_secinfo_flavors *flavors;
6665
6666 page = alloc_page(GFP_KERNEL);
6667 if (!page) {
6668 err = -ENOMEM;
6669 goto out;
6670 }
6671
6672 flavors = page_address(page);
6673 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6674
6675 /*
6676 * Fall back on "guess and check" method if
6677 * the server doesn't support SECINFO_NO_NAME
6678 */
6679 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6680 err = nfs4_find_root_sec(server, fhandle, info);
6681 goto out_freepage;
6682 }
6683 if (err)
6684 goto out_freepage;
6685
6686 flavor = nfs_find_best_sec(flavors);
6687 if (err == 0)
6688 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6689
6690out_freepage:
6691 put_page(page);
6692 if (err == -EACCES)
6693 return -EPERM;
6694out:
6695 return err;
6696}
1cab0652
BS		 6697
6698static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6699{
6700 int status;
6701 struct nfs41_test_stateid_args args = {
1cab0652 6702 .stateid = stateid,
7d974794
BS		 6703 };
6704 struct nfs41_test_stateid_res res;
6705 struct rpc_message msg = {
6706 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6707 .rpc_argp = &args,
6708 .rpc_resp = &res,
6709 };
1cab0652 6710
38527b15 6711 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6712 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6713 nfs4_set_sequence_privileged(&args.seq_args);
6714 status = nfs4_call_sync_sequence(server->client, server, &msg,
6715 &args.seq_args, &res.seq_res);
38527b15
CL		 6716 if (status != NFS_OK) {
6717 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6718 return status;
38527b15
CL		 6719 }
6720 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6721 return -res.status;
7d974794
BS		 6722}
6723
38527b15
CL		 6724/**
6725 * nfs41_test_stateid - perform a TEST_STATEID operation
6726 *
6727 * @server: server / transport on which to perform the operation
6728 * @stateid: state ID to test
6729 *
6730 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6731 * Otherwise a negative NFS4ERR value is returned if the operation
6732 * failed or the state ID is not currently valid.
6733 */
1cab0652 6734static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6735{
6736 struct nfs4_exception exception = { };
6737 int err;
6738 do {
377e507d
CL		 6739 err = _nfs41_test_stateid(server, stateid);
6740 if (err != -NFS4ERR_DELAY)
6741 break;
6742 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6743 } while (exception.retry);
6744 return err;
6745}
9aeda35f 6746
1cab0652 6747static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6748{
9aeda35f 6749 struct nfs41_free_stateid_args args = {
1cab0652 6750 .stateid = stateid,
9aeda35f
BS		 6751 };
6752 struct nfs41_free_stateid_res res;
6753 struct rpc_message msg = {
6754 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6755 .rpc_argp = &args,
6756 .rpc_resp = &res,
6757 };
38527b15 6758 int status;
9aeda35f 6759
38527b15 6760 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6761 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 6762 nfs4_set_sequence_privileged(&args.seq_args);
38527b15 6763 status = nfs4_call_sync_sequence(server->client, server, &msg,
8fe72bac 6764 &args.seq_args, &res.seq_res);
38527b15
CL		 6765 dprintk("NFS reply free_stateid: %d\n", status);
6766 return status;
9aeda35f
BS		 6767}
6768
38527b15
CL		 6769/**
6770 * nfs41_free_stateid - perform a FREE_STATEID operation
6771 *
6772 * @server: server / transport on which to perform the operation
6773 * @stateid: state ID to release
6774 *
6775 * Returns NFS_OK if the server freed "stateid". Otherwise a
6776 * negative NFS4ERR value is returned.
6777 */
1cab0652 6778static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6779{
6780 struct nfs4_exception exception = { };
6781 int err;
6782 do {
377e507d
CL		 6783 err = _nfs4_free_stateid(server, stateid);
6784 if (err != -NFS4ERR_DELAY)
6785 break;
6786 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6787 } while (exception.retry);
6788 return err;
6789}
36281caa
TM		 6790
6791static bool nfs41_match_stateid(const nfs4_stateid *s1,
6792 const nfs4_stateid *s2)
6793{
2d2f24ad 6794 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6795 return false;
6796
2d2f24ad 6797 if (s1->seqid == s2->seqid)
36281caa 6798 return true;
2d2f24ad 6799 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6800 return true;
6801
6802 return false;
6803}
6804
557134a3
AA		 6805#endif /* CONFIG_NFS_V4_1 */
6806
36281caa
TM		 6807static bool nfs4_match_stateid(const nfs4_stateid *s1,
6808 const nfs4_stateid *s2)
6809{
f597c537 6810 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6811}
6812
6813
17280175 6814static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6815 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6816 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6817 .recover_open = nfs4_open_reclaim,
6818 .recover_lock = nfs4_lock_reclaim,
591d71cb 6819 .establish_clid = nfs4_init_clientid,
90a16617 6820 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6821 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6822};
6823
591d71cb 6824#if defined(CONFIG_NFS_V4_1)
17280175 6825static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6826 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6827 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6828 .recover_open = nfs4_open_reclaim,
6829 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6830 .establish_clid = nfs41_init_clientid,
b4b82607 6831 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6832 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6833 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6834};
6835#endif /* CONFIG_NFS_V4_1 */
6836
17280175 6837static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6838 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6839 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6840 .recover_open = nfs4_open_expired,
6841 .recover_lock = nfs4_lock_expired,
6842 .establish_clid = nfs4_init_clientid,
90a16617 6843 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6844};
6845
6846#if defined(CONFIG_NFS_V4_1)
17280175 6847static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6848 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6849 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6850 .recover_open = nfs41_open_expired,
6851 .recover_lock = nfs41_lock_expired,
4d643d1d 6852 .establish_clid = nfs41_init_clientid,
b4b82607 6853 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6854};
591d71cb 6855#endif /* CONFIG_NFS_V4_1 */
1da177e4 6856
17280175 6857static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6858 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6859 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6860 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6861};
6862
6863#if defined(CONFIG_NFS_V4_1)
17280175 6864static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6865 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6866 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6867 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6868};
6869#endif
6870
97dc1359
TM		 6871static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6872 .minor_version = 0,
39c6daae
TM		 6873 .init_caps = NFS_CAP_READDIRPLUS
6874 | NFS_CAP_ATOMIC_OPEN
6875 | NFS_CAP_CHANGE_ATTR
6876 | NFS_CAP_POSIX_LOCK,
97dc1359 6877 .call_sync = _nfs4_call_sync,
36281caa 6878 .match_stateid = nfs4_match_stateid,
fca78d6d 6879 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6880 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6881 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6882 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6883};
6884
6885#if defined(CONFIG_NFS_V4_1)
6886static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6887 .minor_version = 1,
39c6daae
TM		 6888 .init_caps = NFS_CAP_READDIRPLUS
6889 | NFS_CAP_ATOMIC_OPEN
6890 | NFS_CAP_CHANGE_ATTR
3b66486c 6891 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 6892 | NFS_CAP_STATEID_NFSV41
6893 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 6894 .call_sync = nfs4_call_sync_sequence,
36281caa 6895 .match_stateid = nfs41_match_stateid,
fca78d6d 6896 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6897 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6898 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6899 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6900};
6901#endif
6902
97dc1359
TM		 6903const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6904 [0] = &nfs_v4_0_minor_ops,
6905#if defined(CONFIG_NFS_V4_1)
6906 [1] = &nfs_v4_1_minor_ops,
6907#endif
6908};
6909
73a79706
BS		 6910const struct inode_operations nfs4_dir_inode_operations = {
6911 .create = nfs_create,
6912 .lookup = nfs_lookup,
6913 .atomic_open = nfs_atomic_open,
6914 .link = nfs_link,
6915 .unlink = nfs_unlink,
6916 .symlink = nfs_symlink,
6917 .mkdir = nfs_mkdir,
6918 .rmdir = nfs_rmdir,
6919 .mknod = nfs_mknod,
6920 .rename = nfs_rename,
6921 .permission = nfs_permission,
6922 .getattr = nfs_getattr,
6923 .setattr = nfs_setattr,
6924 .getxattr = generic_getxattr,
6925 .setxattr = generic_setxattr,
6926 .listxattr = generic_listxattr,
6927 .removexattr = generic_removexattr,
6928};
6929
92e1d5be 6930static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6931 .permission = nfs_permission,
6932 .getattr = nfs_getattr,
6933 .setattr = nfs_setattr,
64c2ce8b
AK		 6934 .getxattr = generic_getxattr,
6935 .setxattr = generic_setxattr,
6936 .listxattr = generic_listxattr,
6937 .removexattr = generic_removexattr,
6b3b5496
BF		 6938};
6939
509de811 6940const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6941 .version = 4, /* protocol version */
6942 .dentry_ops = &nfs4_dentry_operations,
6943 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6944 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6945 .file_ops = &nfs4_file_operations,
1da177e4 6946 .getroot = nfs4_proc_get_root,
281cad46 6947 .submount = nfs4_submount,
ff9099f2 6948 .try_mount = nfs4_try_mount,
1da177e4
LT		 6949 .getattr = nfs4_proc_getattr,
6950 .setattr = nfs4_proc_setattr,
6951 .lookup = nfs4_proc_lookup,
6952 .access = nfs4_proc_access,
6953 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6954 .create = nfs4_proc_create,
6955 .remove = nfs4_proc_remove,
6956 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6957 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6958 .unlink_done = nfs4_proc_unlink_done,
6959 .rename = nfs4_proc_rename,
d3d4152a 6960 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6961 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6962 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6963 .link = nfs4_proc_link,
6964 .symlink = nfs4_proc_symlink,
6965 .mkdir = nfs4_proc_mkdir,
6966 .rmdir = nfs4_proc_remove,
6967 .readdir = nfs4_proc_readdir,
6968 .mknod = nfs4_proc_mknod,
6969 .statfs = nfs4_proc_statfs,
6970 .fsinfo = nfs4_proc_fsinfo,
6971 .pathconf = nfs4_proc_pathconf,
e9326dca 6972 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6973 .decode_dirent = nfs4_decode_dirent,
6974 .read_setup = nfs4_proc_read_setup,
1abb5088 6975 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 6976 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6977 .read_done = nfs4_read_done,
1da177e4 6978 .write_setup = nfs4_proc_write_setup,
57208fa7 6979 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 6980 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6981 .write_done = nfs4_write_done,
1da177e4 6982 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 6983 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 6984 .commit_done = nfs4_commit_done,
1da177e4 6985 .lock = nfs4_proc_lock,
e50a1c2e 6986 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6987 .close_context = nfs4_close_context,
2b484297 6988 .open_context = nfs4_atomic_open,
011e2a7f 6989 .have_delegation = nfs4_have_delegation,
57ec14c5 6990 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 6991 .alloc_client = nfs4_alloc_client,
45a52a02 6992 .init_client = nfs4_init_client,
cdb7eced 6993 .free_client = nfs4_free_client,
1179acc6
BS		 6994 .create_server = nfs4_create_server,
6995 .clone_server = nfs_clone_server,
1da177e4
LT		 6996};
6997
64c2ce8b
AK		 6998static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6999 .prefix = XATTR_NAME_NFSV4_ACL,
7000 .list = nfs4_xattr_list_nfs4_acl,
7001 .get = nfs4_xattr_get_nfs4_acl,
7002 .set = nfs4_xattr_set_nfs4_acl,
7003};
7004
7005const struct xattr_handler *nfs4_xattr_handlers[] = {
7006 &nfs4_xattr_nfs4_acl_handler,
7007 NULL
7008};
7009
1da177e4
LT		 7010/*
7011 * Local variables:
7012 * c-basic-offset: 8
7013 * End:
7014 */
Linux 6.x block layer and io_uring tree(s)