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NFSv4.1: Set the RPC_CLNT_CREATE_INFINITE_SLOTS flag for NFSv4.1 transports
[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);
dc0b027d 981 switch (fmode) {
003707c7
TM		 982 case FMODE_READ:
983 set_bit(NFS_O_RDONLY_STATE, &state->flags);
984 break;
985 case FMODE_WRITE:
986 set_bit(NFS_O_WRONLY_STATE, &state->flags);
987 break;
988 case FMODE_READ|FMODE_WRITE:
989 set_bit(NFS_O_RDWR_STATE, &state->flags);
990 }
e7616923
TM		 991}
992
dc0b027d 993static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 994{
8bda4e4c 995 write_seqlock(&state->seqlock);
dc0b027d 996 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 997 write_sequnlock(&state->seqlock);
003707c7
TM		 998}
999
dc0b027d 1000static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1001{
8bda4e4c
TM		 1002 /*
1003 * Protect the call to nfs4_state_set_mode_locked and
1004 * serialise the stateid update
1005 */
1006 write_seqlock(&state->seqlock);
003707c7 1007 if (deleg_stateid != NULL) {
f597c537 1008 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1009 set_bit(NFS_DELEGATED_STATE, &state->flags);
1010 }
1011 if (open_stateid != NULL)
dc0b027d 1012 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1013 write_sequnlock(&state->seqlock);
1014 spin_lock(&state->owner->so_lock);
dc0b027d 1015 update_open_stateflags(state, fmode);
ec073428 1016 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1017}
1018
dc0b027d 1019static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1020{
1021 struct nfs_inode *nfsi = NFS_I(state->inode);
1022 struct nfs_delegation *deleg_cur;
1023 int ret = 0;
1024
dc0b027d 1025 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1026
1027 rcu_read_lock();
1028 deleg_cur = rcu_dereference(nfsi->delegation);
1029 if (deleg_cur == NULL)
1030 goto no_delegation;
1031
1032 spin_lock(&deleg_cur->lock);
1033 if (nfsi->delegation != deleg_cur ||
d25be546 1034 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1035 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1036 goto no_delegation_unlock;
1037
1038 if (delegation == NULL)
1039 delegation = &deleg_cur->stateid;
f597c537 1040 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1041 goto no_delegation_unlock;
1042
b7391f44 1043 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1044 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1045 ret = 1;
1046no_delegation_unlock:
1047 spin_unlock(&deleg_cur->lock);
1048no_delegation:
1049 rcu_read_unlock();
1050
1051 if (!ret && open_stateid != NULL) {
dc0b027d 1052 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1053 ret = 1;
1054 }
1055
1056 return ret;
1057}
1058
1059
dc0b027d 1060static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1061{
1062 struct nfs_delegation *delegation;
1063
1064 rcu_read_lock();
1065 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1066 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1067 rcu_read_unlock();
1068 return;
1069 }
1070 rcu_read_unlock();
57ec14c5 1071 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1072}
1073
6ee41268 1074static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1075{
1076 struct nfs4_state *state = opendata->state;
1077 struct nfs_inode *nfsi = NFS_I(state->inode);
1078 struct nfs_delegation *delegation;
536e43d1 1079 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1080 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1081 nfs4_stateid stateid;
1082 int ret = -EAGAIN;
1083
aac00a8d 1084 for (;;) {
dc0b027d 1085 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1086 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1087 if (can_open_cached(state, fmode, open_mode)) {
1088 update_open_stateflags(state, fmode);
6ee41268 1089 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1090 goto out_return_state;
1091 }
1092 spin_unlock(&state->owner->so_lock);
1093 }
34310430
TM		 1094 rcu_read_lock();
1095 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1096 if (!can_open_delegated(delegation, fmode)) {
34310430 1097 rcu_read_unlock();
aac00a8d 1098 break;
34310430 1099 }
aac00a8d 1100 /* Save the delegation */
f597c537 1101 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1102 rcu_read_unlock();
af22f94a 1103 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1104 if (ret != 0)
1105 goto out;
1106 ret = -EAGAIN;
34310430
TM		 1107
1108 /* Try to update the stateid using the delegation */
dc0b027d 1109 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1110 goto out_return_state;
aac00a8d 1111 }
aac00a8d
TM		 1112out:
1113 return ERR_PTR(ret);
1114out_return_state:
1115 atomic_inc(&state->count);
1116 return state;
1117}
1118
e23008ec
AA		 1119static void
1120nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1121{
1122 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1123 struct nfs_delegation *delegation;
1124 int delegation_flags = 0;
1125
1126 rcu_read_lock();
1127 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1128 if (delegation)
1129 delegation_flags = delegation->flags;
1130 rcu_read_unlock();
1131 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1132 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1133 "returning a delegation for "
1134 "OPEN(CLAIM_DELEGATE_CUR)\n",
1135 clp->cl_hostname);
1136 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1137 nfs_inode_set_delegation(state->inode,
1138 data->owner->so_cred,
1139 &data->o_res);
1140 else
1141 nfs_inode_reclaim_delegation(state->inode,
1142 data->owner->so_cred,
1143 &data->o_res);
1144}
1145
1146/*
1147 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1148 * and update the nfs4_state.
1149 */
1150static struct nfs4_state *
1151_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1152{
1153 struct inode *inode = data->state->inode;
1154 struct nfs4_state *state = data->state;
1155 int ret;
1156
1157 if (!data->rpc_done) {
1158 ret = data->rpc_status;
1159 goto err;
1160 }
1161
1162 ret = -ESTALE;
1163 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1164 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1165 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1166 goto err;
1167
1168 ret = -ENOMEM;
1169 state = nfs4_get_open_state(inode, data->owner);
1170 if (state == NULL)
1171 goto err;
1172
1173 ret = nfs_refresh_inode(inode, &data->f_attr);
1174 if (ret)
1175 goto err;
1176
1177 if (data->o_res.delegation_type != 0)
1178 nfs4_opendata_check_deleg(data, state);
1179 update_open_stateid(state, &data->o_res.stateid, NULL,
1180 data->o_arg.fmode);
1181
1182 return state;
1183err:
1184 return ERR_PTR(ret);
1185
1186}
1187
1188static struct nfs4_state *
1189_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1190{
1191 struct inode *inode;
1192 struct nfs4_state *state = NULL;
1b370bc2 1193 int ret;
24ac23ab 1194
aac00a8d 1195 if (!data->rpc_done) {
6ee41268 1196 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1197 goto out;
1198 }
1199
1b370bc2 1200 ret = -EAGAIN;
24ac23ab 1201 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1202 goto err;
24ac23ab 1203 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1204 ret = PTR_ERR(inode);
03f28e3a 1205 if (IS_ERR(inode))
1b370bc2
TM		 1206 goto err;
1207 ret = -ENOMEM;
24ac23ab
TM		 1208 state = nfs4_get_open_state(inode, data->owner);
1209 if (state == NULL)
1b370bc2 1210 goto err_put_inode;
e23008ec
AA		 1211 if (data->o_res.delegation_type != 0)
1212 nfs4_opendata_check_deleg(data, state);
34310430 1213 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1214 data->o_arg.fmode);
24ac23ab 1215 iput(inode);
aac00a8d 1216out:
7aa262b5 1217 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1218 return state;
1b370bc2
TM		 1219err_put_inode:
1220 iput(inode);
1221err:
1222 return ERR_PTR(ret);
24ac23ab
TM		 1223}
1224
e23008ec
AA		 1225static struct nfs4_state *
1226nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1227{
1228 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1229 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1230 return _nfs4_opendata_to_nfs4_state(data);
1231}
1232
864472e9
TM		 1233static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1234{
1235 struct nfs_inode *nfsi = NFS_I(state->inode);
1236 struct nfs_open_context *ctx;
1237
1238 spin_lock(&state->inode->i_lock);
1239 list_for_each_entry(ctx, &nfsi->open_files, list) {
1240 if (ctx->state != state)
1241 continue;
1242 get_nfs_open_context(ctx);
1243 spin_unlock(&state->inode->i_lock);
1244 return ctx;
1245 }
1246 spin_unlock(&state->inode->i_lock);
1247 return ERR_PTR(-ENOENT);
1248}
1249
4a1c0893
TM		 1250static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1251 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1252{
1253 struct nfs4_opendata *opendata;
1254
4a1c0893
TM		 1255 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1256 NULL, claim, GFP_NOFS);
6f220ed5
TM		 1257 if (opendata == NULL)
1258 return ERR_PTR(-ENOMEM);
1259 opendata->state = state;
1260 atomic_inc(&state->count);
1261 return opendata;
1262}
1263
dc0b027d 1264static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1265{
2ced46c2 1266 struct nfs4_state *newstate;
864472e9
TM		 1267 int ret;
1268
dc0b027d
TM		 1269 opendata->o_arg.open_flags = 0;
1270 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1271 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1272 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1273 nfs4_init_opendata_res(opendata);
b257957e 1274 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1275 if (ret != 0)
1276 return ret;
2ced46c2 1277 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1278 if (IS_ERR(newstate))
1279 return PTR_ERR(newstate);
643168c2 1280 nfs4_close_state(newstate, fmode);
2ced46c2 1281 *res = newstate;
864472e9
TM		 1282 return 0;
1283}
1284
1285static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1286{
864472e9 1287 struct nfs4_state *newstate;
864472e9
TM		 1288 int ret;
1289
1290 /* memory barrier prior to reading state->n_* */
2ced46c2 1291 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1292 smp_rmb();
1293 if (state->n_rdwr != 0) {
b0ed9dbc 1294 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1295 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1296 if (ret != 0)
1297 return ret;
2ced46c2
TM		 1298 if (newstate != state)
1299 return -ESTALE;
864472e9
TM		 1300 }
1301 if (state->n_wronly != 0) {
b0ed9dbc 1302 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1303 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1304 if (ret != 0)
1305 return ret;
2ced46c2
TM		 1306 if (newstate != state)
1307 return -ESTALE;
864472e9
TM		 1308 }
1309 if (state->n_rdonly != 0) {
b0ed9dbc 1310 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1311 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1312 if (ret != 0)
1313 return ret;
2ced46c2
TM		 1314 if (newstate != state)
1315 return -ESTALE;
864472e9 1316 }
1ac7e2fd
TM		 1317 /*
1318 * We may have performed cached opens for all three recoveries.
1319 * Check if we need to update the current stateid.
1320 */
1321 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1322 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1323 write_seqlock(&state->seqlock);
1ac7e2fd 1324 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1325 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1326 write_sequnlock(&state->seqlock);
1ac7e2fd 1327 }
864472e9
TM		 1328 return 0;
1329}
1330
1da177e4
LT		 1331/*
1332 * OPEN_RECLAIM:
1333 * reclaim state on the server after a reboot.
1da177e4 1334 */
539cd03a 1335static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1336{
1ac7e2fd 1337 struct nfs_delegation *delegation;
864472e9 1338 struct nfs4_opendata *opendata;
dc0b027d 1339 fmode_t delegation_type = 0;
1da177e4
LT		 1340 int status;
1341
4a1c0893
TM		 1342 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1343 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1344 if (IS_ERR(opendata))
1345 return PTR_ERR(opendata);
1ac7e2fd
TM		 1346 rcu_read_lock();
1347 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1348 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1349 delegation_type = delegation->type;
1ac7e2fd 1350 rcu_read_unlock();
864472e9
TM		 1351 opendata->o_arg.u.delegation_type = delegation_type;
1352 status = nfs4_open_recover(opendata, state);
c6d00e63 1353 nfs4_opendata_put(opendata);
1da177e4
LT		 1354 return status;
1355}
1356
539cd03a 1357static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1358{
1359 struct nfs_server *server = NFS_SERVER(state->inode);
1360 struct nfs4_exception exception = { };
1361 int err;
1362 do {
539cd03a 1363 err = _nfs4_do_open_reclaim(ctx, state);
49f9a0fa
TM		 1364 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1365 continue;
168667c4 1366 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1367 break;
1368 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1369 } while (exception.retry);
1370 return err;
1371}
1372
864472e9
TM		 1373static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1374{
1375 struct nfs_open_context *ctx;
1376 int ret;
1377
1378 ctx = nfs4_state_find_open_context(state);
1379 if (IS_ERR(ctx))
91876b13 1380 return -EAGAIN;
539cd03a 1381 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1382 put_nfs_open_context(ctx);
1383 return ret;
1384}
1385
db4f2e63 1386static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1387{
be76b5b6
TM		 1388 switch (err) {
1389 default:
1390 printk(KERN_ERR "NFS: %s: unhandled error "
1391 "%d.\n", __func__, err);
1392 case 0:
1393 case -ENOENT:
1394 case -ESTALE:
1395 break;
1396 case -NFS4ERR_BADSESSION:
1397 case -NFS4ERR_BADSLOT:
1398 case -NFS4ERR_BAD_HIGH_SLOT:
1399 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1400 case -NFS4ERR_DEADSESSION:
1401 set_bit(NFS_DELEGATED_STATE, &state->flags);
1402 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1403 return -EAGAIN;
1404 case -NFS4ERR_STALE_CLIENTID:
1405 case -NFS4ERR_STALE_STATEID:
1406 set_bit(NFS_DELEGATED_STATE, &state->flags);
1407 case -NFS4ERR_EXPIRED:
1408 /* Don't recall a delegation if it was lost */
1409 nfs4_schedule_lease_recovery(server->nfs_client);
1410 return -EAGAIN;
1411 case -NFS4ERR_DELEG_REVOKED:
1412 case -NFS4ERR_ADMIN_REVOKED:
1413 case -NFS4ERR_BAD_STATEID:
db4f2e63 1414 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1415 nfs_inode_find_state_and_recover(state->inode,
1416 stateid);
1417 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1418 return 0;
1419 case -NFS4ERR_DELAY:
1420 case -NFS4ERR_GRACE:
1421 set_bit(NFS_DELEGATED_STATE, &state->flags);
1422 ssleep(1);
1423 return -EAGAIN;
db4f2e63
TM		 1424 case -ENOMEM:
1425 case -NFS4ERR_DENIED:
1426 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1427 return 0;
be76b5b6 1428 }
1da177e4
LT		 1429 return err;
1430}
1431
db4f2e63
TM		 1432int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1433{
1434 struct nfs_server *server = NFS_SERVER(state->inode);
1435 struct nfs4_opendata *opendata;
1436 int err;
1437
1438 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1439 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1440 if (IS_ERR(opendata))
1441 return PTR_ERR(opendata);
1442 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1443 err = nfs4_open_recover(opendata, state);
1444 nfs4_opendata_put(opendata);
1445 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1446}
1447
cdd4e68b
TM		 1448static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1449{
1450 struct nfs4_opendata *data = calldata;
1451
1452 data->rpc_status = task->tk_status;
26e976a8 1453 if (data->rpc_status == 0) {
f597c537 1454 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1455 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1456 renew_lease(data->o_res.server, data->timestamp);
3e309914 1457 data->rpc_done = 1;
26e976a8 1458 }
cdd4e68b
TM		 1459}
1460
1461static void nfs4_open_confirm_release(void *calldata)
1462{
1463 struct nfs4_opendata *data = calldata;
1464 struct nfs4_state *state = NULL;
1465
1466 /* If this request hasn't been cancelled, do nothing */
1467 if (data->cancelled == 0)
1468 goto out_free;
1469 /* In case of error, no cleanup! */
3e309914 1470 if (!data->rpc_done)
cdd4e68b 1471 goto out_free;
cdd4e68b 1472 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1473 if (!IS_ERR(state))
643168c2 1474 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1475out_free:
c6d00e63 1476 nfs4_opendata_put(data);
cdd4e68b
TM		 1477}
1478
1479static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1480 .rpc_call_done = nfs4_open_confirm_done,
1481 .rpc_release = nfs4_open_confirm_release,
1482};
1483
1484/*
1485 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1486 */
1487static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1488{
1489 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1490 struct rpc_task *task;
5138fde0
TM		 1491 struct rpc_message msg = {
1492 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1493 .rpc_argp = &data->c_arg,
1494 .rpc_resp = &data->c_res,
1495 .rpc_cred = data->owner->so_cred,
1496 };
c970aa85
TM		 1497 struct rpc_task_setup task_setup_data = {
1498 .rpc_client = server->client,
5138fde0 1499 .rpc_message = &msg,
c970aa85
TM		 1500 .callback_ops = &nfs4_open_confirm_ops,
1501 .callback_data = data,
101070ca 1502 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1503 .flags = RPC_TASK_ASYNC,
1504 };
1da177e4
LT		 1505 int status;
1506
c6d00e63 1507 kref_get(&data->kref);
3e309914
TM		 1508 data->rpc_done = 0;
1509 data->rpc_status = 0;
5138fde0 1510 data->timestamp = jiffies;
c970aa85 1511 task = rpc_run_task(&task_setup_data);
7a1218a2 1512 if (IS_ERR(task))
cdd4e68b 1513 return PTR_ERR(task);
cdd4e68b
TM		 1514 status = nfs4_wait_for_completion_rpc_task(task);
1515 if (status != 0) {
1516 data->cancelled = 1;
1517 smp_wmb();
1518 } else
1519 status = data->rpc_status;
e6b3c4db 1520 rpc_put_task(task);
1da177e4
LT		 1521 return status;
1522}
1523
24ac23ab 1524static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1525{
24ac23ab
TM		 1526 struct nfs4_opendata *data = calldata;
1527 struct nfs4_state_owner *sp = data->owner;
5138fde0 1528
24ac23ab 1529 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1530 goto out_wait;
aac00a8d
TM		 1531 /*
1532 * Check if we still need to send an OPEN call, or if we can use
1533 * a delegation instead.
1534 */
1535 if (data->state != NULL) {
1536 struct nfs_delegation *delegation;
1537
dc0b027d 1538 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1539 goto out_no_action;
aac00a8d
TM		 1540 rcu_read_lock();
1541 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1542 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1543 can_open_delegated(delegation, data->o_arg.fmode))
1544 goto unlock_no_action;
aac00a8d
TM		 1545 rcu_read_unlock();
1546 }
95b72eb0 1547 /* Update client id. */
1f0e890d 1548 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1549 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1550 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
e23008ec 1551 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
6f220ed5
TM		 1552 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1553 }
26e976a8 1554 data->timestamp = jiffies;
035168ab 1555 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1556 &data->o_arg.seq_args,
2240a9e2
TM		 1557 &data->o_res.seq_res,
1558 task) != 0)
1559 nfs_release_seqid(data->o_arg.seqid);
6ee41268 1560 return;
652f89f6
TM		 1561unlock_no_action:
1562 rcu_read_unlock();
6ee41268
TM		 1563out_no_action:
1564 task->tk_action = NULL;
c8da19b9 1565out_wait:
b75ad4cd 1566 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1567}
1568
24ac23ab
TM		 1569static void nfs4_open_done(struct rpc_task *task, void *calldata)
1570{
1571 struct nfs4_opendata *data = calldata;
1da177e4 1572
24ac23ab 1573 data->rpc_status = task->tk_status;
d898528c 1574
14516c3a
TM		 1575 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1576 return;
d898528c 1577
24ac23ab 1578 if (task->tk_status == 0) {
807d66d8
TM		 1579 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1580 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1581 case S_IFREG:
1582 break;
1583 case S_IFLNK:
24ac23ab 1584 data->rpc_status = -ELOOP;
6f926b5b
TM		 1585 break;
1586 case S_IFDIR:
24ac23ab 1587 data->rpc_status = -EISDIR;
6f926b5b
TM		 1588 break;
1589 default:
24ac23ab 1590 data->rpc_status = -ENOTDIR;
807d66d8 1591 }
6f926b5b 1592 }
26e976a8 1593 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1594 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1595 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1596 }
3e309914 1597 data->rpc_done = 1;
24ac23ab 1598}
6f926b5b 1599
24ac23ab
TM		 1600static void nfs4_open_release(void *calldata)
1601{
1602 struct nfs4_opendata *data = calldata;
1603 struct nfs4_state *state = NULL;
1604
1605 /* If this request hasn't been cancelled, do nothing */
1606 if (data->cancelled == 0)
1607 goto out_free;
1608 /* In case of error, no cleanup! */
3e309914 1609 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1610 goto out_free;
1611 /* In case we need an open_confirm, no cleanup! */
1612 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1613 goto out_free;
24ac23ab 1614 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1615 if (!IS_ERR(state))
643168c2 1616 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1617out_free:
c6d00e63 1618 nfs4_opendata_put(data);
24ac23ab
TM		 1619}
1620
1621static const struct rpc_call_ops nfs4_open_ops = {
1622 .rpc_call_prepare = nfs4_open_prepare,
1623 .rpc_call_done = nfs4_open_done,
1624 .rpc_release = nfs4_open_release,
1625};
1626
b257957e 1627static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1628{
1629 struct inode *dir = data->dir->d_inode;
1630 struct nfs_server *server = NFS_SERVER(dir);
1631 struct nfs_openargs *o_arg = &data->o_arg;
1632 struct nfs_openres *o_res = &data->o_res;
1633 struct rpc_task *task;
5138fde0
TM		 1634 struct rpc_message msg = {
1635 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1636 .rpc_argp = o_arg,
1637 .rpc_resp = o_res,
1638 .rpc_cred = data->owner->so_cred,
1639 };
c970aa85
TM		 1640 struct rpc_task_setup task_setup_data = {
1641 .rpc_client = server->client,
5138fde0 1642 .rpc_message = &msg,
c970aa85
TM		 1643 .callback_ops = &nfs4_open_ops,
1644 .callback_data = data,
101070ca 1645 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1646 .flags = RPC_TASK_ASYNC,
1647 };
24ac23ab
TM		 1648 int status;
1649
9d12b216 1650 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1651 kref_get(&data->kref);
3e309914
TM		 1652 data->rpc_done = 0;
1653 data->rpc_status = 0;
2ced46c2 1654 data->cancelled = 0;
b257957e 1655 if (isrecover)
8fe72bac 1656 nfs4_set_sequence_privileged(&o_arg->seq_args);
c970aa85 1657 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1658 if (IS_ERR(task))
1659 return PTR_ERR(task);
1660 status = nfs4_wait_for_completion_rpc_task(task);
1661 if (status != 0) {
1662 data->cancelled = 1;
1663 smp_wmb();
1664 } else
1665 status = data->rpc_status;
1666 rpc_put_task(task);
1667
1668 return status;
1669}
1670
1671static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1672{
1673 struct inode *dir = data->dir->d_inode;
1674 struct nfs_openres *o_res = &data->o_res;
1675 int status;
1676
1677 status = nfs4_run_open_task(data, 1);
1678 if (status != 0 || !data->rpc_done)
1679 return status;
1680
6926afd1
TM		 1681 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1682
b257957e
AB		 1683 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1684 status = _nfs4_proc_open_confirm(data);
1685 if (status != 0)
1686 return status;
1687 }
1688
1689 return status;
1690}
1691
6168f62c
WAA		 1692static int nfs4_opendata_access(struct rpc_cred *cred,
1693 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1694 struct nfs4_state *state, fmode_t fmode,
1695 int openflags)
6168f62c
WAA		 1696{
1697 struct nfs_access_entry cache;
1698 u32 mask;
1699
1700 /* access call failed or for some reason the server doesn't
1701 * support any access modes -- defer access call until later */
1702 if (opendata->o_res.access_supported == 0)
1703 return 0;
1704
1705 mask = 0;
bbd3a8ee 1706 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1707 * write mode bits, but POSIX allows the creating process to write.
1708 * use openflags to check for exec, because fmode won't
1709 * always have FMODE_EXEC set when file open for exec. */
1710 if (openflags & __FMODE_EXEC) {
1711 /* ONLY check for exec rights */
1712 mask = MAY_EXEC;
1713 } else if (fmode & FMODE_READ)
1714 mask = MAY_READ;
6168f62c
WAA		 1715
1716 cache.cred = cred;
1717 cache.jiffies = jiffies;
1718 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1719 nfs_access_add_cache(state->inode, &cache);
1720
bbd3a8ee 1721 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1722 return 0;
1723
1724 /* even though OPEN succeeded, access is denied. Close the file */
1725 nfs4_close_state(state, fmode);
998f40b5 1726 return -EACCES;
6168f62c
WAA		 1727}
1728
b257957e
AB		 1729/*
1730 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1731 */
1732static int _nfs4_proc_open(struct nfs4_opendata *data)
1733{
1734 struct inode *dir = data->dir->d_inode;
1735 struct nfs_server *server = NFS_SERVER(dir);
1736 struct nfs_openargs *o_arg = &data->o_arg;
1737 struct nfs_openres *o_res = &data->o_res;
1738 int status;
1739
1740 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1741 if (!data->rpc_done)
1742 return status;
1743 if (status != 0) {
1744 if (status == -NFS4ERR_BADNAME &&
1745 !(o_arg->open_flags & O_CREAT))
1746 return -ENOENT;
24ac23ab 1747 return status;
08ef7bd3 1748 }
24ac23ab 1749
6926afd1
TM		 1750 nfs_fattr_map_and_free_names(server, &data->f_attr);
1751
90ff0c54 1752 if (o_arg->open_flags & O_CREAT)
56ae19f3 1753 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1754 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1755 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1756 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1757 status = _nfs4_proc_open_confirm(data);
1da177e4 1758 if (status != 0)
24ac23ab 1759 return status;
1da177e4
LT		 1760 }
1761 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1762 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1763 return 0;
1da177e4
LT		 1764}
1765
d83217c1
AA		 1766static int nfs4_recover_expired_lease(struct nfs_server *server)
1767{
1768 return nfs4_client_recover_expired_lease(server->nfs_client);
1769}
1770
1da177e4
LT		 1771/*
1772 * OPEN_EXPIRED:
1773 * reclaim state on the server after a network partition.
1774 * Assumes caller holds the appropriate lock
1775 */
539cd03a 1776static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1777{
e56e0b78 1778 struct nfs4_opendata *opendata;
864472e9 1779 int ret;
1da177e4 1780
4a1c0893 1781 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1782 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1783 if (IS_ERR(opendata))
1784 return PTR_ERR(opendata);
864472e9 1785 ret = nfs4_open_recover(opendata, state);
35d05778 1786 if (ret == -ESTALE)
3d4ff43d 1787 d_drop(ctx->dentry);
c6d00e63 1788 nfs4_opendata_put(opendata);
864472e9 1789 return ret;
1da177e4
LT		 1790}
1791
a9ed2e25 1792static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1793{
539cd03a 1794 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1795 struct nfs4_exception exception = { };
1796 int err;
1797
1798 do {
539cd03a 1799 err = _nfs4_open_expired(ctx, state);
49f9a0fa
TM		 1800 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1801 continue;
a9ed2e25
TM		 1802 switch (err) {
1803 default:
1804 goto out;
1805 case -NFS4ERR_GRACE:
1806 case -NFS4ERR_DELAY:
1807 nfs4_handle_exception(server, err, &exception);
1808 err = 0;
1809 }
202b50dc 1810 } while (exception.retry);
a9ed2e25 1811out:
202b50dc
TM		 1812 return err;
1813}
1814
1da177e4
LT		 1815static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1816{
1da177e4 1817 struct nfs_open_context *ctx;
864472e9 1818 int ret;
1da177e4 1819
864472e9
TM		 1820 ctx = nfs4_state_find_open_context(state);
1821 if (IS_ERR(ctx))
91876b13 1822 return -EAGAIN;
539cd03a 1823 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1824 put_nfs_open_context(ctx);
1825 return ret;
1da177e4
LT		 1826}
1827
f062eb6c 1828#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1829static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1830{
f062eb6c 1831 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1832 nfs4_stateid *stateid = &state->stateid;
1833 int status;
1834
1835 /* If a state reset has been done, test_stateid is unneeded */
1836 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1837 return;
1838
1839 status = nfs41_test_stateid(server, stateid);
1840 if (status != NFS_OK) {
1841 /* Free the stateid unless the server explicitly
1842 * informs us the stateid is unrecognized. */
1843 if (status != -NFS4ERR_BAD_STATEID)
1844 nfs41_free_stateid(server, stateid);
6938867e 1845 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1846
6938867e
BS		 1847 write_seqlock(&state->seqlock);
1848 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1849 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1850 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1851 }
1852}
1853
1854/**
1855 * nfs41_check_open_stateid - possibly free an open stateid
1856 *
1857 * @state: NFSv4 state for an inode
1858 *
1859 * Returns NFS_OK if recovery for this stateid is now finished.
1860 * Otherwise a negative NFS4ERR value is returned.
1861 */
1862static int nfs41_check_open_stateid(struct nfs4_state *state)
1863{
1864 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1865 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1866 int status;
1867
1868 /* If a state reset has been done, test_stateid is unneeded */
1869 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1870 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1871 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1872 return -NFS4ERR_BAD_STATEID;
1873
1874 status = nfs41_test_stateid(server, stateid);
1875 if (status != NFS_OK) {
1876 /* Free the stateid unless the server explicitly
1877 * informs us the stateid is unrecognized. */
1878 if (status != -NFS4ERR_BAD_STATEID)
1879 nfs41_free_stateid(server, stateid);
1880
1881 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1882 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1883 clear_bit(NFS_O_RDWR_STATE, &state->flags);
b01dd1d8
BS		 1884 }
1885 return status;
1886}
1887
1888static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1889{
eb64cf96 1890 int status;
b01dd1d8 1891
3e60ffdd
CL		 1892 nfs41_clear_delegation_stateid(state);
1893 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1894 if (status != NFS_OK)
1895 status = nfs4_open_expired(sp, state);
1896 return status;
f062eb6c
BS		 1897}
1898#endif
1899
aa53ed54
JL		 1900/*
1901 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1902 * fields corresponding to attributes that were used to store the verifier.
1903 * Make sure we clobber those fields in the later setattr call
1904 */
1905static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1906{
1907 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1908 !(sattr->ia_valid & ATTR_ATIME_SET))
1909 sattr->ia_valid |= ATTR_ATIME;
1910
1911 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1912 !(sattr->ia_valid & ATTR_MTIME_SET))
1913 sattr->ia_valid |= ATTR_MTIME;
1914}
1915
c21443c2
TM		 1916static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1917 fmode_t fmode,
1918 int flags,
1919 struct nfs4_state **res)
1920{
1921 struct nfs4_state_owner *sp = opendata->owner;
1922 struct nfs_server *server = sp->so_server;
1923 struct nfs4_state *state;
1924 unsigned int seq;
1925 int ret;
1926
1927 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1928
1929 ret = _nfs4_proc_open(opendata);
1930 if (ret != 0)
1931 goto out;
1932
1933 state = nfs4_opendata_to_nfs4_state(opendata);
1934 ret = PTR_ERR(state);
1935 if (IS_ERR(state))
1936 goto out;
1937 if (server->caps & NFS_CAP_POSIX_LOCK)
1938 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1939
1940 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1941 if (ret != 0)
1942 goto out;
1943
91876b13 1944 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
c21443c2 1945 nfs4_schedule_stateid_recovery(server, state);
c21443c2
TM		 1946 *res = state;
1947out:
1948 return ret;
1949}
1950
1da177e4 1951/*
24ac23ab 1952 * Returns a referenced nfs4_state
1da177e4 1953 */
82be417a
AA		 1954static int _nfs4_do_open(struct inode *dir,
1955 struct dentry *dentry,
1956 fmode_t fmode,
1957 int flags,
1958 struct iattr *sattr,
1959 struct rpc_cred *cred,
1960 struct nfs4_state **res,
1961 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1962{
1963 struct nfs4_state_owner *sp;
1964 struct nfs4_state *state = NULL;
1965 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1966 struct nfs4_opendata *opendata;
49f9a0fa 1967 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
aac00a8d 1968 int status;
1da177e4
LT		 1969
1970 /* Protect against reboot recovery conflicts */
1da177e4 1971 status = -ENOMEM;
d1e284d5
TM		 1972 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1973 if (sp == NULL) {
1da177e4
LT		 1974 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1975 goto out_err;
1976 }
58d9714a
TM		 1977 status = nfs4_recover_expired_lease(server);
1978 if (status != 0)
b4454fe1 1979 goto err_put_state_owner;
82a2c1b7
AV		 1980 if (dentry->d_inode != NULL)
1981 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1982 status = -ENOMEM;
49f9a0fa
TM		 1983 if (dentry->d_inode)
1984 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 1985 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
49f9a0fa 1986 claim, GFP_KERNEL);
e56e0b78 1987 if (opendata == NULL)
95d35cb4 1988 goto err_put_state_owner;
1da177e4 1989
82be417a
AA		 1990 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1991 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1992 if (!opendata->f_attr.mdsthreshold)
1993 goto err_opendata_put;
1549210f 1994 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 1995 }
82a2c1b7
AV		 1996 if (dentry->d_inode != NULL)
1997 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1998
c21443c2 1999 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
6168f62c
WAA		 2000 if (status != 0)
2001 goto err_opendata_put;
2002
0ab64e0e
TM		 2003 if (opendata->o_arg.open_flags & O_EXCL) {
2004 nfs4_exclusive_attrset(opendata, sattr);
2005
2006 nfs_fattr_init(opendata->o_res.f_attr);
2007 status = nfs4_do_setattr(state->inode, cred,
2008 opendata->o_res.f_attr, sattr,
2009 state);
2010 if (status == 0)
2011 nfs_setattr_update_inode(state->inode, sattr);
2012 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
2013 }
82be417a
AA		 2014
2015 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2016 *ctx_th = opendata->f_attr.mdsthreshold;
2017 else
2018 kfree(opendata->f_attr.mdsthreshold);
2019 opendata->f_attr.mdsthreshold = NULL;
2020
c6d00e63 2021 nfs4_opendata_put(opendata);
1da177e4 2022 nfs4_put_state_owner(sp);
1da177e4
LT		 2023 *res = state;
2024 return 0;
c6d00e63 2025err_opendata_put:
82be417a 2026 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2027 nfs4_opendata_put(opendata);
e56e0b78
TM		 2028err_put_state_owner:
2029 nfs4_put_state_owner(sp);
1da177e4 2030out_err:
1da177e4
LT		 2031 *res = NULL;
2032 return status;
2033}
2034
2035
82be417a
AA		 2036static struct nfs4_state *nfs4_do_open(struct inode *dir,
2037 struct dentry *dentry,
2038 fmode_t fmode,
2039 int flags,
2040 struct iattr *sattr,
2041 struct rpc_cred *cred,
2042 struct nfs4_threshold **ctx_th)
1da177e4 2043{
49f9a0fa 2044 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2045 struct nfs4_exception exception = { };
2046 struct nfs4_state *res;
2047 int status;
2048
6168f62c 2049 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 2050 do {
82be417a
AA		 2051 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
2052 &res, ctx_th);
1da177e4
LT		 2053 if (status == 0)
2054 break;
2055 /* NOTE: BAD_SEQID means the server and client disagree about the
2056 * book-keeping w.r.t. state-changing operations
2057 * (OPEN/CLOSE/LOCK/LOCKU...)
2058 * It is actually a sign of a bug on the client or on the server.
2059 *
2060 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2061 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2062 * have unhashed the old state_owner for us, and that we can
2063 * therefore safely retry using a new one. We should still warn
2064 * the user though...
2065 */
2066 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2067 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2068 " returned a bad sequence-id error!\n",
2069 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2070 exception.retry = 1;
2071 continue;
2072 }
550f5747
TM		 2073 /*
2074 * BAD_STATEID on OPEN means that the server cancelled our
2075 * state before it received the OPEN_CONFIRM.
2076 * Recover by retrying the request as per the discussion
2077 * on Page 181 of RFC3530.
2078 */
2079 if (status == -NFS4ERR_BAD_STATEID) {
2080 exception.retry = 1;
2081 continue;
2082 }
aac00a8d
TM		 2083 if (status == -EAGAIN) {
2084 /* We must have found a delegation */
2085 exception.retry = 1;
2086 continue;
2087 }
49f9a0fa
TM		 2088 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2089 continue;
2090 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2091 status, &exception));
2092 } while (exception.retry);
2093 return res;
2094}
2095
659bfcd6
TM		 2096static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2097 struct nfs_fattr *fattr, struct iattr *sattr,
2098 struct nfs4_state *state)
1da177e4 2099{
3e4f6290 2100 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2101 struct nfs_setattrargs arg = {
3e4f6290 2102 .fh = NFS_FH(inode),
1da177e4
LT		 2103 .iap = sattr,
2104 .server = server,
2105 .bitmask = server->attr_bitmask,
2106 };
2107 struct nfs_setattrres res = {
2108 .fattr = fattr,
2109 .server = server,
2110 };
2111 struct rpc_message msg = {
659bfcd6
TM		 2112 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2113 .rpc_argp = &arg,
2114 .rpc_resp = &res,
2115 .rpc_cred = cred,
1da177e4 2116 };
26e976a8 2117 unsigned long timestamp = jiffies;
65e4308d 2118 int status;
1da177e4 2119
0e574af1 2120 nfs_fattr_init(fattr);
1da177e4 2121
5d422301 2122 if (state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2123 struct nfs_lockowner lockowner = {
2124 .l_owner = current->files,
2125 .l_pid = current->tgid,
2126 };
4fc8796d 2127 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2128 &lockowner);
4fc8796d
TM		 2129 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2130 FMODE_WRITE)) {
3e4f6290 2131 /* Use that stateid */
08e9eac4 2132 } else
f597c537 2133 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2134
7c513058 2135 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2136 if (status == 0 && state != NULL)
2137 renew_lease(server, timestamp);
65e4308d 2138 return status;
1da177e4
LT		 2139}
2140
659bfcd6
TM		 2141static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2142 struct nfs_fattr *fattr, struct iattr *sattr,
2143 struct nfs4_state *state)
1da177e4 2144{
3e4f6290 2145 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2146 struct nfs4_exception exception = {
2147 .state = state,
3114ea7a 2148 .inode = inode,
a1d0b5ee 2149 };
1da177e4
LT		 2150 int err;
2151 do {
451146be
TM		 2152 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2153 switch (err) {
2154 case -NFS4ERR_OPENMODE:
2155 if (state && !(state->state & FMODE_WRITE)) {
2156 err = -EBADF;
2157 if (sattr->ia_valid & ATTR_OPEN)
2158 err = -EACCES;
2159 goto out;
2160 }
2161 }
2162 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2163 } while (exception.retry);
451146be 2164out:
1da177e4
LT		 2165 return err;
2166}
2167
2168struct nfs4_closedata {
2169 struct inode *inode;
2170 struct nfs4_state *state;
2171 struct nfs_closeargs arg;
2172 struct nfs_closeres res;
516a6af6 2173 struct nfs_fattr fattr;
26e976a8 2174 unsigned long timestamp;
f7e8917a
FI		 2175 bool roc;
2176 u32 roc_barrier;
1da177e4
LT		 2177};
2178
963d8fe5 2179static void nfs4_free_closedata(void *data)
9512135d 2180{
963d8fe5
TM		 2181 struct nfs4_closedata *calldata = data;
2182 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2183 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2184
f7e8917a
FI		 2185 if (calldata->roc)
2186 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2187 nfs4_put_open_state(calldata->state);
2188 nfs_free_seqid(calldata->arg.seqid);
9512135d 2189 nfs4_put_state_owner(sp);
322b2b90 2190 nfs_sb_deactive(sb);
9512135d
TM		 2191 kfree(calldata);
2192}
2193
88069f77
TM		 2194static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2195 fmode_t fmode)
2196{
2197 spin_lock(&state->owner->so_lock);
2198 if (!(fmode & FMODE_READ))
2199 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2200 if (!(fmode & FMODE_WRITE))
2201 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2202 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2203 spin_unlock(&state->owner->so_lock);
2204}
2205
963d8fe5 2206static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2207{
963d8fe5 2208 struct nfs4_closedata *calldata = data;
1da177e4 2209 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2210 struct nfs_server *server = NFS_SERVER(calldata->inode);
2211
a3ca5651 2212 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2213 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2214 return;
1da177e4
LT		 2215 /* hmm. we are done with the inode, and in the process of freeing
2216 * the state_owner. we keep this around to process errors
2217 */
1da177e4
LT		 2218 switch (task->tk_status) {
2219 case 0:
f7e8917a
FI		 2220 if (calldata->roc)
2221 pnfs_roc_set_barrier(state->inode,
2222 calldata->roc_barrier);
45328c35 2223 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2224 renew_lease(server, calldata->timestamp);
88069f77
TM		 2225 nfs4_close_clear_stateid_flags(state,
2226 calldata->arg.fmode);
1da177e4
LT		 2227 break;
2228 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2229 case -NFS4ERR_OLD_STATEID:
2230 case -NFS4ERR_BAD_STATEID:
1da177e4 2231 case -NFS4ERR_EXPIRED:
dc0b027d 2232 if (calldata->arg.fmode == 0)
9e33bed5 2233 break;
1da177e4 2234 default:
72211dbe
TM		 2235 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2236 rpc_restart_call_prepare(task);
1da177e4 2237 }
72211dbe 2238 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2239 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2240 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2241}
2242
4ce70ada 2243static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2244{
4ce70ada 2245 struct nfs4_closedata *calldata = data;
9512135d 2246 struct nfs4_state *state = calldata->state;
7fdab069 2247 struct inode *inode = calldata->inode;
88069f77 2248 int call_close = 0;
9512135d 2249
a3ca5651 2250 dprintk("%s: begin!\n", __func__);
963d8fe5 2251 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2252 goto out_wait;
003707c7 2253
88069f77
TM		 2254 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2255 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2256 spin_lock(&state->owner->so_lock);
003707c7 2257 /* Calculate the change in open mode */
e7616923 2258 if (state->n_rdwr == 0) {
003707c7 2259 if (state->n_rdonly == 0) {
88069f77
TM		 2260 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2261 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2262 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2263 }
2264 if (state->n_wronly == 0) {
88069f77
TM		 2265 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2266 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2267 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2268 }
e7616923 2269 }
5d422301
TM		 2270 if (!nfs4_valid_open_stateid(state))
2271 call_close = 0;
4cecb76f 2272 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2273
2274 if (!call_close) {
963d8fe5 2275 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2276 goto out_no_action;
9512135d 2277 }
88069f77 2278
f7e8917a 2279 if (calldata->arg.fmode == 0) {
88069f77 2280 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2281 if (calldata->roc &&
b9536ad5
AA		 2282 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2283 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2284 goto out_wait;
b9536ad5 2285 }
f7e8917a 2286 }
88069f77 2287
516a6af6 2288 nfs_fattr_init(calldata->res.fattr);
26e976a8 2289 calldata->timestamp = jiffies;
7fdab069 2290 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2291 &calldata->arg.seq_args,
2292 &calldata->res.seq_res,
2240a9e2
TM		 2293 task) != 0)
2294 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2295 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2296 return;
2297out_no_action:
2298 task->tk_action = NULL;
2299out_wait:
2300 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2301}
2302
963d8fe5 2303static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2304 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2305 .rpc_call_done = nfs4_close_done,
2306 .rpc_release = nfs4_free_closedata,
2307};
2308
1da177e4
LT		 2309/*
2310 * It is possible for data to be read/written from a mem-mapped file
2311 * after the sys_close call (which hits the vfs layer as a flush).
2312 * This means that we can't safely call nfsv4 close on a file until
2313 * the inode is cleared. This in turn means that we are not good
2314 * NFSv4 citizens - we do not indicate to the server to update the file's
2315 * share state even when we are done with one of the three share
2316 * stateid's in the inode.
2317 *
2318 * NOTE: Caller must be holding the sp->so_owner semaphore!
2319 */
1f7977c1 2320int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2321{
4a35bd41 2322 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2323 struct nfs4_closedata *calldata;
b39e625b
TM		 2324 struct nfs4_state_owner *sp = state->owner;
2325 struct rpc_task *task;
5138fde0
TM		 2326 struct rpc_message msg = {
2327 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2328 .rpc_cred = state->owner->so_cred,
2329 };
c970aa85
TM		 2330 struct rpc_task_setup task_setup_data = {
2331 .rpc_client = server->client,
5138fde0 2332 .rpc_message = &msg,
c970aa85 2333 .callback_ops = &nfs4_close_ops,
101070ca 2334 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2335 .flags = RPC_TASK_ASYNC,
2336 };
9512135d 2337 int status = -ENOMEM;
1da177e4 2338
8535b2be 2339 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2340 if (calldata == NULL)
9512135d 2341 goto out;
9d12b216 2342 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2343 calldata->inode = state->inode;
1da177e4 2344 calldata->state = state;
4a35bd41 2345 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2346 calldata->arg.stateid = &state->open_stateid;
1da177e4 2347 /* Serialization for the sequence id */
8535b2be 2348 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2349 if (calldata->arg.seqid == NULL)
2350 goto out_free_calldata;
dc0b027d 2351 calldata->arg.fmode = 0;
a65318bf 2352 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2353 calldata->res.fattr = &calldata->fattr;
c1d51931 2354 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2355 calldata->res.server = server;
1f7977c1 2356 calldata->roc = pnfs_roc(state->inode);
643168c2 2357 nfs_sb_active(calldata->inode->i_sb);
9512135d 2358
1174dd1f
TM		 2359 msg.rpc_argp = &calldata->arg;
2360 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2361 task_setup_data.callback_data = calldata;
2362 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2363 if (IS_ERR(task))
2364 return PTR_ERR(task);
a49c3c77
TM		 2365 status = 0;
2366 if (wait)
2367 status = rpc_wait_for_completion_task(task);
b39e625b 2368 rpc_put_task(task);
a49c3c77 2369 return status;
9512135d
TM		 2370out_free_calldata:
2371 kfree(calldata);
2372out:
b39e625b
TM		 2373 nfs4_put_open_state(state);
2374 nfs4_put_state_owner(sp);
9512135d 2375 return status;
1da177e4
LT		 2376}
2377
2b484297 2378static struct inode *
cd9a1c0e 2379nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2380{
1da177e4 2381 struct nfs4_state *state;
1da177e4 2382
565277f6 2383 /* Protect against concurrent sillydeletes */
82be417a
AA		 2384 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2385 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2386 if (IS_ERR(state))
2387 return ERR_CAST(state);
cd9a1c0e 2388 ctx->state = state;
f46e0bd3 2389 return igrab(state->inode);
1da177e4
LT		 2390}
2391
1185a552 2392static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2393{
2394 if (ctx->state == NULL)
2395 return;
2396 if (is_sync)
643168c2 2397 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2398 else
643168c2 2399 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2400}
1da177e4
LT		 2401
2402static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2403{
43652ad5
BH		 2404 struct nfs4_server_caps_arg args = {
2405 .fhandle = fhandle,
2406 };
1da177e4
LT		 2407 struct nfs4_server_caps_res res = {};
2408 struct rpc_message msg = {
2409 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2410 .rpc_argp = &args,
1da177e4
LT		 2411 .rpc_resp = &res,
2412 };
2413 int status;
2414
7c513058 2415 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2416 if (status == 0) {
2417 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2418 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2419 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2420 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2421 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2422 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2423 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2424 server->caps |= NFS_CAP_ACLS;
2425 if (res.has_links != 0)
2426 server->caps |= NFS_CAP_HARDLINKS;
2427 if (res.has_symlinks != 0)
2428 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2429 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2430 server->caps |= NFS_CAP_FILEID;
2431 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2432 server->caps |= NFS_CAP_MODE;
2433 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2434 server->caps |= NFS_CAP_NLINK;
2435 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2436 server->caps |= NFS_CAP_OWNER;
2437 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2438 server->caps |= NFS_CAP_OWNER_GROUP;
2439 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2440 server->caps |= NFS_CAP_ATIME;
2441 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2442 server->caps |= NFS_CAP_CTIME;
2443 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2444 server->caps |= NFS_CAP_MTIME;
2445
a65318bf
TM		 2446 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2447 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2448 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2449 server->acl_bitmask = res.acl_bitmask;
264e6351 2450 server->fh_expire_type = res.fh_expire_type;
1da177e4 2451 }
cccef3b9 2452
1da177e4
LT		 2453 return status;
2454}
2455
55a97593 2456int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2457{
2458 struct nfs4_exception exception = { };
2459 int err;
2460 do {
2461 err = nfs4_handle_exception(server,
2462 _nfs4_server_capabilities(server, fhandle),
2463 &exception);
2464 } while (exception.retry);
2465 return err;
2466}
2467
2468static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2469 struct nfs_fsinfo *info)
2470{
1da177e4
LT		 2471 struct nfs4_lookup_root_arg args = {
2472 .bitmask = nfs4_fattr_bitmap,
2473 };
2474 struct nfs4_lookup_res res = {
2475 .server = server,
0e574af1 2476 .fattr = info->fattr,
1da177e4
LT		 2477 .fh = fhandle,
2478 };
2479 struct rpc_message msg = {
2480 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2481 .rpc_argp = &args,
2482 .rpc_resp = &res,
2483 };
008f55d0 2484
0e574af1 2485 nfs_fattr_init(info->fattr);
7c513058 2486 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2487}
2488
2489static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2490 struct nfs_fsinfo *info)
2491{
2492 struct nfs4_exception exception = { };
2493 int err;
2494 do {
fb8a5ba8
BS		 2495 err = _nfs4_lookup_root(server, fhandle, info);
2496 switch (err) {
2497 case 0:
2498 case -NFS4ERR_WRONGSEC:
05e9cfb4 2499 goto out;
fb8a5ba8
BS		 2500 default:
2501 err = nfs4_handle_exception(server, err, &exception);
2502 }
1da177e4 2503 } while (exception.retry);
05e9cfb4 2504out:
1da177e4
LT		 2505 return err;
2506}
2507
8f70e95f
BS		 2508static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2509 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2510{
2511 struct rpc_auth *auth;
2512 int ret;
2513
2514 auth = rpcauth_create(flavor, server->client);
e8d920c5 2515 if (IS_ERR(auth)) {
8f70e95f
BS		 2516 ret = -EIO;
2517 goto out;
2518 }
2519 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2520out:
2521 return ret;
2522}
2523
801a16dc 2524static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2525 struct nfs_fsinfo *info)
1da177e4 2526{
8f70e95f 2527 int i, len, status = 0;
0fabee24 2528 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2529
6a1a1e34 2530 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
4ea8fed5
TM		 2531 if (len < 0)
2532 return len;
8f70e95f
BS		 2533
2534 for (i = 0; i < len; i++) {
6a1a1e34
CL		 2535 /* AUTH_UNIX is the default flavor if none was specified,
2536 * thus has already been tried. */
2537 if (flav_array[i] == RPC_AUTH_UNIX)
2538 continue;
2539
8f70e95f 2540 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2541 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2542 continue;
2543 break;
8f70e95f 2544 }
fb8a5ba8
BS		 2545 /*
2546 * -EACCESS could mean that the user doesn't have correct permissions
2547 * to access the mount. It could also mean that we tried to mount
2548 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2549 * existing mount programs don't handle -EACCES very well so it should
2550 * be mapped to -EPERM instead.
2551 */
2552 if (status == -EACCES)
2553 status = -EPERM;
801a16dc
BS		 2554 return status;
2555}
2556
2557/*
2558 * get the file handle for the "/" directory on the server
2559 */
3028eb2b
BS		 2560int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2561 struct nfs_fsinfo *info)
801a16dc 2562{
fca78d6d 2563 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2564 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2565 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2566 /*
2567 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2568 * by nfs4_map_errors() as this function exits.
2569 */
fca78d6d 2570 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2571 if (status == 0)
2572 status = nfs4_server_capabilities(server, fhandle);
2573 if (status == 0)
2574 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2575 return nfs4_map_errors(status);
1da177e4
LT		 2576}
2577
bae36241
BS		 2578static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2579 struct nfs_fsinfo *info)
2580{
2581 int error;
2582 struct nfs_fattr *fattr = info->fattr;
2583
2584 error = nfs4_server_capabilities(server, mntfh);
2585 if (error < 0) {
2586 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2587 return error;
2588 }
2589
2590 error = nfs4_proc_getattr(server, mntfh, fattr);
2591 if (error < 0) {
2592 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2593 return error;
2594 }
2595
2596 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2597 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2598 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2599
2600 return error;
2601}
2602
6b97fd3d
MN		 2603/*
2604 * Get locations and (maybe) other attributes of a referral.
2605 * Note that we'll actually follow the referral later when
2606 * we detect fsid mismatch in inode revalidation
2607 */
f05d147f
BS		 2608static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2609 const struct qstr *name, struct nfs_fattr *fattr,
2610 struct nfs_fh *fhandle)
6b97fd3d
MN		 2611{
2612 int status = -ENOMEM;
2613 struct page *page = NULL;
2614 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2615
2616 page = alloc_page(GFP_KERNEL);
2617 if (page == NULL)
2618 goto out;
2619 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2620 if (locations == NULL)
2621 goto out;
2622
f05d147f 2623 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2624 if (status != 0)
2625 goto out;
2626 /* Make sure server returned a different fsid for the referral */
2627 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2628 dprintk("%s: server did not return a different fsid for"
2629 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2630 status = -EIO;
2631 goto out;
2632 }
533eb461
AA		 2633 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2634 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2635
533eb461 2636 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2637 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2638 memset(fhandle, 0, sizeof(struct nfs_fh));
2639out:
2640 if (page)
2641 __free_page(page);
5d7ca35a 2642 kfree(locations);
6b97fd3d
MN		 2643 return status;
2644}
2645
1da177e4
LT		 2646static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2647{
2648 struct nfs4_getattr_arg args = {
2649 .fh = fhandle,
2650 .bitmask = server->attr_bitmask,
2651 };
2652 struct nfs4_getattr_res res = {
2653 .fattr = fattr,
2654 .server = server,
2655 };
2656 struct rpc_message msg = {
2657 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2658 .rpc_argp = &args,
2659 .rpc_resp = &res,
2660 };
2661
0e574af1 2662 nfs_fattr_init(fattr);
7c513058 2663 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2664}
2665
2666static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2667{
2668 struct nfs4_exception exception = { };
2669 int err;
2670 do {
2671 err = nfs4_handle_exception(server,
2672 _nfs4_proc_getattr(server, fhandle, fattr),
2673 &exception);
2674 } while (exception.retry);
2675 return err;
2676}
2677
2678/*
2679 * The file is not closed if it is opened due to the a request to change
2680 * the size of the file. The open call will not be needed once the
2681 * VFS layer lookup-intents are implemented.
2682 *
2683 * Close is called when the inode is destroyed.
2684 * If we haven't opened the file for O_WRONLY, we
2685 * need to in the size_change case to obtain a stateid.
2686 *
2687 * Got race?
2688 * Because OPEN is always done by name in nfsv4, it is
2689 * possible that we opened a different file by the same
2690 * name. We can recognize this race condition, but we
2691 * can't do anything about it besides returning an error.
2692 *
2693 * This will be fixed with VFS changes (lookup-intent).
2694 */
2695static int
2696nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2697 struct iattr *sattr)
2698{
08e9eac4 2699 struct inode *inode = dentry->d_inode;
659bfcd6 2700 struct rpc_cred *cred = NULL;
d530838b 2701 struct nfs4_state *state = NULL;
1da177e4
LT		 2702 int status;
2703
8a1636c4 2704 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2705 pnfs_commit_and_return_layout(inode);
8a1636c4 2706
0e574af1 2707 nfs_fattr_init(fattr);
1da177e4 2708
2669940d
AA		 2709 /* Deal with open(O_TRUNC) */
2710 if (sattr->ia_valid & ATTR_OPEN)
2711 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2712
2713 /* Optimization: if the end result is no change, don't RPC */
2714 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2715 return 0;
2716
d530838b 2717 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2718 if (sattr->ia_valid & ATTR_FILE) {
2719 struct nfs_open_context *ctx;
2720
2721 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2722 if (ctx) {
2723 cred = ctx->cred;
2724 state = ctx->state;
2725 }
659bfcd6 2726 }
08e9eac4 2727
659bfcd6 2728 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2729 if (status == 0)
2730 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2731 return status;
2732}
2733
0c2e53f1
TM		 2734static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2735 const struct qstr *name, struct nfs_fh *fhandle,
2736 struct nfs_fattr *fattr)
2b3de441 2737{
0c2e53f1 2738 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2739 int status;
2740 struct nfs4_lookup_arg args = {
2741 .bitmask = server->attr_bitmask,
0c2e53f1 2742 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2743 .name = name,
2744 };
2745 struct nfs4_lookup_res res = {
2746 .server = server,
2747 .fattr = fattr,
2748 .fh = fhandle,
2749 };
2750 struct rpc_message msg = {
2751 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2752 .rpc_argp = &args,
2753 .rpc_resp = &res,
2754 };
2755
2756 nfs_fattr_init(fattr);
2757
1da177e4 2758 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2759 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2760 dprintk("NFS reply lookup: %d\n", status);
2761 return status;
2762}
2763
72de53ec 2764static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2765{
7ebb9315 2766 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2767 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2768 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2769 fattr->nlink = 2;
2770}
2771
72de53ec
BS		 2772static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2773 struct qstr *name, struct nfs_fh *fhandle,
2774 struct nfs_fattr *fattr)
1da177e4
LT		 2775{
2776 struct nfs4_exception exception = { };
72de53ec 2777 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2778 int err;
2779 do {
72de53ec
BS		 2780 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2781 switch (err) {
08ef7bd3 2782 case -NFS4ERR_BADNAME:
72de53ec
BS		 2783 err = -ENOENT;
2784 goto out;
0c2e53f1 2785 case -NFS4ERR_MOVED:
f05d147f 2786 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2787 goto out;
0c2e53f1 2788 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2789 err = -EPERM;
2790 if (client != *clnt)
2791 goto out;
2792
2793 client = nfs4_create_sec_client(client, dir, name);
2794 if (IS_ERR(client))
2795 return PTR_ERR(client);
2796
2797 exception.retry = 1;
2798 break;
2799 default:
2800 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2801 }
1da177e4 2802 } while (exception.retry);
72de53ec
BS		 2803
2804out:
2805 if (err == 0)
2806 *clnt = client;
2807 else if (client != *clnt)
2808 rpc_shutdown_client(client);
2809
1da177e4
LT		 2810 return err;
2811}
2812
80a16b21 2813static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2814 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2815{
2816 int status;
2817 struct rpc_clnt *client = NFS_CLIENT(dir);
2818
2819 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2820 if (client != NFS_CLIENT(dir)) {
2821 rpc_shutdown_client(client);
2822 nfs_fixup_secinfo_attributes(fattr);
2823 }
2824 return status;
2825}
2826
f05d147f
BS		 2827struct rpc_clnt *
2828nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2829 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2830{
2831 int status;
2832 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2833
2834 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2835 if (status < 0) {
2836 rpc_shutdown_client(client);
2837 return ERR_PTR(status);
2838 }
2839 return client;
2840}
2841
1da177e4
LT		 2842static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2843{
76b32999 2844 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2845 struct nfs4_accessargs args = {
2846 .fh = NFS_FH(inode),
a4980e78 2847 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2848 };
2849 struct nfs4_accessres res = {
2850 .server = server,
1da177e4 2851 };
1da177e4
LT		 2852 struct rpc_message msg = {
2853 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2854 .rpc_argp = &args,
2855 .rpc_resp = &res,
2856 .rpc_cred = entry->cred,
2857 };
2858 int mode = entry->mask;
2859 int status;
2860
2861 /*
2862 * Determine which access bits we want to ask for...
2863 */
2864 if (mode & MAY_READ)
2865 args.access |= NFS4_ACCESS_READ;
2866 if (S_ISDIR(inode->i_mode)) {
2867 if (mode & MAY_WRITE)
2868 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2869 if (mode & MAY_EXEC)
2870 args.access |= NFS4_ACCESS_LOOKUP;
2871 } else {
2872 if (mode & MAY_WRITE)
2873 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2874 if (mode & MAY_EXEC)
2875 args.access |= NFS4_ACCESS_EXECUTE;
2876 }
c407d41a
TM		 2877
2878 res.fattr = nfs_alloc_fattr();
2879 if (res.fattr == NULL)
2880 return -ENOMEM;
2881
7c513058 2882 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2883 if (!status) {
6168f62c 2884 nfs_access_set_mask(entry, res.access);
c407d41a 2885 nfs_refresh_inode(inode, res.fattr);
1da177e4 2886 }
c407d41a 2887 nfs_free_fattr(res.fattr);
1da177e4
LT		 2888 return status;
2889}
2890
2891static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2892{
2893 struct nfs4_exception exception = { };
2894 int err;
2895 do {
2896 err = nfs4_handle_exception(NFS_SERVER(inode),
2897 _nfs4_proc_access(inode, entry),
2898 &exception);
2899 } while (exception.retry);
2900 return err;
2901}
2902
2903/*
2904 * TODO: For the time being, we don't try to get any attributes
2905 * along with any of the zero-copy operations READ, READDIR,
2906 * READLINK, WRITE.
2907 *
2908 * In the case of the first three, we want to put the GETATTR
2909 * after the read-type operation -- this is because it is hard
2910 * to predict the length of a GETATTR response in v4, and thus
2911 * align the READ data correctly. This means that the GETATTR
2912 * may end up partially falling into the page cache, and we should
2913 * shift it into the 'tail' of the xdr_buf before processing.
2914 * To do this efficiently, we need to know the total length
2915 * of data received, which doesn't seem to be available outside
2916 * of the RPC layer.
2917 *
2918 * In the case of WRITE, we also want to put the GETATTR after
2919 * the operation -- in this case because we want to make sure
140150db 2920 * we get the post-operation mtime and size.
1da177e4
LT		 2921 *
2922 * Both of these changes to the XDR layer would in fact be quite
2923 * minor, but I decided to leave them for a subsequent patch.
2924 */
2925static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2926 unsigned int pgbase, unsigned int pglen)
2927{
2928 struct nfs4_readlink args = {
2929 .fh = NFS_FH(inode),
2930 .pgbase = pgbase,
2931 .pglen = pglen,
2932 .pages = &page,
2933 };
f50c7000 2934 struct nfs4_readlink_res res;
1da177e4
LT		 2935 struct rpc_message msg = {
2936 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2937 .rpc_argp = &args,
f50c7000 2938 .rpc_resp = &res,
1da177e4
LT		 2939 };
2940
7c513058 2941 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2942}
2943
2944static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2945 unsigned int pgbase, unsigned int pglen)
2946{
2947 struct nfs4_exception exception = { };
2948 int err;
2949 do {
2950 err = nfs4_handle_exception(NFS_SERVER(inode),
2951 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2952 &exception);
2953 } while (exception.retry);
2954 return err;
2955}
2956
1da177e4 2957/*
8867fe58 2958 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2959 */
1da177e4
LT		 2960static int
2961nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2962 int flags)
1da177e4 2963{
8867fe58 2964 struct nfs_open_context *ctx;
1da177e4 2965 struct nfs4_state *state;
1da177e4
LT		 2966 int status = 0;
2967
8867fe58
MS		 2968 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2969 if (IS_ERR(ctx))
2970 return PTR_ERR(ctx);
2971
a8a5da99 2972 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 2973 state = nfs4_do_open(dir, dentry, ctx->mode,
2974 flags, sattr, ctx->cred,
2975 &ctx->mdsthreshold);
d4d9cdcb 2976 d_drop(dentry);
1da177e4
LT		 2977 if (IS_ERR(state)) {
2978 status = PTR_ERR(state);
c0204fd2 2979 goto out;
1da177e4 2980 }
d4d9cdcb 2981 d_add(dentry, igrab(state->inode));
d75340cc 2982 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 2983 ctx->state = state;
1da177e4 2984out:
8867fe58 2985 put_nfs_open_context(ctx);
1da177e4
LT		 2986 return status;
2987}
2988
2989static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2990{
16e42959 2991 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2992 struct nfs_removeargs args = {
1da177e4 2993 .fh = NFS_FH(dir),
26fe5750 2994 .name = *name,
16e42959 2995 };
4fdc17b2 2996 struct nfs_removeres res = {
16e42959 2997 .server = server,
1da177e4 2998 };
1da177e4 2999 struct rpc_message msg = {
4fdc17b2
TM		 3000 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3001 .rpc_argp = &args,
3002 .rpc_resp = &res,
1da177e4 3003 };
778d2817 3004 int status;
1da177e4 3005
7c513058 3006 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3007 if (status == 0)
16e42959 3008 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3009 return status;
3010}
3011
3012static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3013{
3014 struct nfs4_exception exception = { };
3015 int err;
3016 do {
3017 err = nfs4_handle_exception(NFS_SERVER(dir),
3018 _nfs4_proc_remove(dir, name),
3019 &exception);
3020 } while (exception.retry);
3021 return err;
3022}
3023
e4eff1a6 3024static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3025{
e4eff1a6
TM		 3026 struct nfs_server *server = NFS_SERVER(dir);
3027 struct nfs_removeargs *args = msg->rpc_argp;
3028 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3029
e4eff1a6 3030 res->server = server;
1da177e4 3031 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 3032 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 3033}
3034
34e137cc
BS		 3035static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3036{
d9afbd1b
TM		 3037 nfs4_setup_sequence(NFS_SERVER(data->dir),
3038 &data->args.seq_args,
3039 &data->res.seq_res,
3040 task);
1da177e4
LT		 3041}
3042
e4eff1a6 3043static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3044{
e4eff1a6
TM		 3045 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3046
14516c3a
TM		 3047 if (!nfs4_sequence_done(task, &res->seq_res))
3048 return 0;
9e33bed5 3049 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3050 return 0;
3051 update_changeattr(dir, &res->cinfo);
e4eff1a6 3052 return 1;
1da177e4
LT		 3053}
3054
d3d4152a
JL		 3055static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3056{
3057 struct nfs_server *server = NFS_SERVER(dir);
3058 struct nfs_renameargs *arg = msg->rpc_argp;
3059 struct nfs_renameres *res = msg->rpc_resp;
3060
3061 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3062 res->server = server;
9d12b216 3063 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3064}
3065
c6bfa1a1
BS		 3066static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3067{
d9afbd1b
TM		 3068 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3069 &data->args.seq_args,
3070 &data->res.seq_res,
3071 task);
d3d4152a
JL		 3072}
3073
3074static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3075 struct inode *new_dir)
3076{
3077 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3078
3079 if (!nfs4_sequence_done(task, &res->seq_res))
3080 return 0;
3081 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3082 return 0;
3083
3084 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3085 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3086 return 1;
3087}
3088
1da177e4
LT		 3089static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3090 struct inode *new_dir, struct qstr *new_name)
3091{
6caf2c82 3092 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3093 struct nfs_renameargs arg = {
1da177e4
LT		 3094 .old_dir = NFS_FH(old_dir),
3095 .new_dir = NFS_FH(new_dir),
3096 .old_name = old_name,
3097 .new_name = new_name,
6caf2c82 3098 };
e8582a8b 3099 struct nfs_renameres res = {
6caf2c82 3100 .server = server,
1da177e4 3101 };
1da177e4
LT		 3102 struct rpc_message msg = {
3103 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3104 .rpc_argp = &arg,
3105 .rpc_resp = &res,
3106 };
011fff72 3107 int status = -ENOMEM;
1da177e4 3108
7c513058 3109 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3110 if (!status) {
3111 update_changeattr(old_dir, &res.old_cinfo);
3112 update_changeattr(new_dir, &res.new_cinfo);
3113 }
3114 return status;
3115}
3116
3117static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3118 struct inode *new_dir, struct qstr *new_name)
3119{
3120 struct nfs4_exception exception = { };
3121 int err;
3122 do {
3123 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3124 _nfs4_proc_rename(old_dir, old_name,
3125 new_dir, new_name),
3126 &exception);
3127 } while (exception.retry);
3128 return err;
3129}
3130
3131static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3132{
91ba2eee 3133 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3134 struct nfs4_link_arg arg = {
3135 .fh = NFS_FH(inode),
3136 .dir_fh = NFS_FH(dir),
3137 .name = name,
91ba2eee
TM		 3138 .bitmask = server->attr_bitmask,
3139 };
91ba2eee
TM		 3140 struct nfs4_link_res res = {
3141 .server = server,
1da177e4 3142 };
1da177e4
LT		 3143 struct rpc_message msg = {
3144 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3145 .rpc_argp = &arg,
91ba2eee 3146 .rpc_resp = &res,
1da177e4 3147 };
136f2627
TM		 3148 int status = -ENOMEM;
3149
3150 res.fattr = nfs_alloc_fattr();
778d2817 3151 if (res.fattr == NULL)
136f2627 3152 goto out;
1da177e4 3153
7c513058 3154 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3155 if (!status) {
3156 update_changeattr(dir, &res.cinfo);
73a3d07c 3157 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3158 }
136f2627 3159out:
136f2627 3160 nfs_free_fattr(res.fattr);
1da177e4
LT		 3161 return status;
3162}
3163
3164static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3165{
3166 struct nfs4_exception exception = { };
3167 int err;
3168 do {
3169 err = nfs4_handle_exception(NFS_SERVER(inode),
3170 _nfs4_proc_link(inode, dir, name),
3171 &exception);
3172 } while (exception.retry);
3173 return err;
3174}
3175
57dc9a57
TM		 3176struct nfs4_createdata {
3177 struct rpc_message msg;
3178 struct nfs4_create_arg arg;
3179 struct nfs4_create_res res;
3180 struct nfs_fh fh;
3181 struct nfs_fattr fattr;
57dc9a57
TM		 3182};
3183
3184static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3185 struct qstr *name, struct iattr *sattr, u32 ftype)
3186{
3187 struct nfs4_createdata *data;
3188
3189 data = kzalloc(sizeof(*data), GFP_KERNEL);
3190 if (data != NULL) {
3191 struct nfs_server *server = NFS_SERVER(dir);
3192
3193 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3194 data->msg.rpc_argp = &data->arg;
3195 data->msg.rpc_resp = &data->res;
3196 data->arg.dir_fh = NFS_FH(dir);
3197 data->arg.server = server;
3198 data->arg.name = name;
3199 data->arg.attrs = sattr;
3200 data->arg.ftype = ftype;
3201 data->arg.bitmask = server->attr_bitmask;
3202 data->res.server = server;
3203 data->res.fh = &data->fh;
3204 data->res.fattr = &data->fattr;
57dc9a57 3205 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3206 }
3207 return data;
3208}
3209
3210static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3211{
7c513058 3212 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3213 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3214 if (status == 0) {
3215 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3216 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3217 }
3218 return status;
3219}
3220
3221static void nfs4_free_createdata(struct nfs4_createdata *data)
3222{
3223 kfree(data);
3224}
3225
4f390c15 3226static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3227 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3228{
57dc9a57
TM		 3229 struct nfs4_createdata *data;
3230 int status = -ENAMETOOLONG;
1da177e4 3231
94a6d753 3232 if (len > NFS4_MAXPATHLEN)
57dc9a57 3233 goto out;
4f390c15 3234
57dc9a57
TM		 3235 status = -ENOMEM;
3236 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3237 if (data == NULL)
3238 goto out;
3239
3240 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3241 data->arg.u.symlink.pages = &page;
3242 data->arg.u.symlink.len = len;
1da177e4 3243
57dc9a57
TM		 3244 status = nfs4_do_create(dir, dentry, data);
3245
3246 nfs4_free_createdata(data);
3247out:
1da177e4
LT		 3248 return status;
3249}
3250
4f390c15 3251static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3252 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3253{
3254 struct nfs4_exception exception = { };
3255 int err;
3256 do {
3257 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3258 _nfs4_proc_symlink(dir, dentry, page,
3259 len, sattr),
1da177e4
LT		 3260 &exception);
3261 } while (exception.retry);
3262 return err;
3263}
3264
3265static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3266 struct iattr *sattr)
3267{
57dc9a57
TM		 3268 struct nfs4_createdata *data;
3269 int status = -ENOMEM;
1da177e4 3270
57dc9a57
TM		 3271 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3272 if (data == NULL)
3273 goto out;
3274
3275 status = nfs4_do_create(dir, dentry, data);
3276
3277 nfs4_free_createdata(data);
3278out:
1da177e4
LT		 3279 return status;
3280}
3281
3282static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3283 struct iattr *sattr)
3284{
3285 struct nfs4_exception exception = { };
3286 int err;
a8a5da99
AK		 3287
3288 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3289 do {
3290 err = nfs4_handle_exception(NFS_SERVER(dir),
3291 _nfs4_proc_mkdir(dir, dentry, sattr),
3292 &exception);
3293 } while (exception.retry);
3294 return err;
3295}
3296
3297static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3298 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3299{
3300 struct inode *dir = dentry->d_inode;
3301 struct nfs4_readdir_arg args = {
3302 .fh = NFS_FH(dir),
56e4ebf8 3303 .pages = pages,
1da177e4
LT		 3304 .pgbase = 0,
3305 .count = count,
96d25e53 3306 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3307 .plus = plus,
1da177e4
LT		 3308 };
3309 struct nfs4_readdir_res res;
3310 struct rpc_message msg = {
3311 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3312 .rpc_argp = &args,
3313 .rpc_resp = &res,
3314 .rpc_cred = cred,
3315 };
3316 int status;
3317
3110ff80 3318 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3319 dentry->d_parent->d_name.name,
3320 dentry->d_name.name,
3321 (unsigned long long)cookie);
c3f52af3 3322 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3323 res.pgbase = args.pgbase;
7c513058 3324 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3325 if (status >= 0) {
c3f52af3 3326 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3327 status += args.pgbase;
3328 }
c4812998
TM		 3329
3330 nfs_invalidate_atime(dir);
3331
3110ff80 3332 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3333 return status;
3334}
3335
3336static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3337 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3338{
3339 struct nfs4_exception exception = { };
3340 int err;
3341 do {
3342 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3343 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3344 pages, count, plus),
1da177e4
LT		 3345 &exception);
3346 } while (exception.retry);
3347 return err;
3348}
3349
3350static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3351 struct iattr *sattr, dev_t rdev)
3352{
57dc9a57
TM		 3353 struct nfs4_createdata *data;
3354 int mode = sattr->ia_mode;
3355 int status = -ENOMEM;
1da177e4 3356
57dc9a57
TM		 3357 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3358 if (data == NULL)
3359 goto out;
3360
1da177e4 3361 if (S_ISFIFO(mode))
57dc9a57 3362 data->arg.ftype = NF4FIFO;
1da177e4 3363 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3364 data->arg.ftype = NF4BLK;
3365 data->arg.u.device.specdata1 = MAJOR(rdev);
3366 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3367 }
3368 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3369 data->arg.ftype = NF4CHR;
3370 data->arg.u.device.specdata1 = MAJOR(rdev);
3371 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3372 } else if (!S_ISSOCK(mode)) {
3373 status = -EINVAL;
3374 goto out_free;
1da177e4 3375 }
1da177e4 3376
57dc9a57 3377 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3378out_free:
57dc9a57
TM		 3379 nfs4_free_createdata(data);
3380out:
1da177e4
LT		 3381 return status;
3382}
3383
3384static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3385 struct iattr *sattr, dev_t rdev)
3386{
3387 struct nfs4_exception exception = { };
3388 int err;
a8a5da99
AK		 3389
3390 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3391 do {
3392 err = nfs4_handle_exception(NFS_SERVER(dir),
3393 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3394 &exception);
3395 } while (exception.retry);
3396 return err;
3397}
3398
3399static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3400 struct nfs_fsstat *fsstat)
3401{
3402 struct nfs4_statfs_arg args = {
3403 .fh = fhandle,
3404 .bitmask = server->attr_bitmask,
3405 };
24ad148a
BH		 3406 struct nfs4_statfs_res res = {
3407 .fsstat = fsstat,
3408 };
1da177e4
LT		 3409 struct rpc_message msg = {
3410 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3411 .rpc_argp = &args,
24ad148a 3412 .rpc_resp = &res,
1da177e4
LT		 3413 };
3414
0e574af1 3415 nfs_fattr_init(fsstat->fattr);
7c513058 3416 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3417}
3418
3419static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3420{
3421 struct nfs4_exception exception = { };
3422 int err;
3423 do {
3424 err = nfs4_handle_exception(server,
3425 _nfs4_proc_statfs(server, fhandle, fsstat),
3426 &exception);
3427 } while (exception.retry);
3428 return err;
3429}
3430
3431static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3432 struct nfs_fsinfo *fsinfo)
3433{
3434 struct nfs4_fsinfo_arg args = {
3435 .fh = fhandle,
3436 .bitmask = server->attr_bitmask,
3437 };
3dda5e43
BH		 3438 struct nfs4_fsinfo_res res = {
3439 .fsinfo = fsinfo,
3440 };
1da177e4
LT		 3441 struct rpc_message msg = {
3442 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3443 .rpc_argp = &args,
3dda5e43 3444 .rpc_resp = &res,
1da177e4
LT		 3445 };
3446
7c513058 3447 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3448}
3449
3450static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3451{
3452 struct nfs4_exception exception = { };
3453 int err;
3454
3455 do {
3456 err = nfs4_handle_exception(server,
3457 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3458 &exception);
3459 } while (exception.retry);
3460 return err;
3461}
3462
3463static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3464{
e38eb650
BS		 3465 int error;
3466
0e574af1 3467 nfs_fattr_init(fsinfo->fattr);
e38eb650 3468 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3469 if (error == 0) {
3470 /* block layout checks this! */
3471 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3472 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3473 }
e38eb650
BS		 3474
3475 return error;
1da177e4
LT		 3476}
3477
3478static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3479 struct nfs_pathconf *pathconf)
3480{
3481 struct nfs4_pathconf_arg args = {
3482 .fh = fhandle,
3483 .bitmask = server->attr_bitmask,
3484 };
d45b2989
BH		 3485 struct nfs4_pathconf_res res = {
3486 .pathconf = pathconf,
3487 };
1da177e4
LT		 3488 struct rpc_message msg = {
3489 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3490 .rpc_argp = &args,
d45b2989 3491 .rpc_resp = &res,
1da177e4
LT		 3492 };
3493
3494 /* None of the pathconf attributes are mandatory to implement */
3495 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3496 memset(pathconf, 0, sizeof(*pathconf));
3497 return 0;
3498 }
3499
0e574af1 3500 nfs_fattr_init(pathconf->fattr);
7c513058 3501 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3502}
3503
3504static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3505 struct nfs_pathconf *pathconf)
3506{
3507 struct nfs4_exception exception = { };
3508 int err;
3509
3510 do {
3511 err = nfs4_handle_exception(server,
3512 _nfs4_proc_pathconf(server, fhandle, pathconf),
3513 &exception);
3514 } while (exception.retry);
3515 return err;
3516}
3517
5521abfd 3518int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3519 const struct nfs_open_context *ctx,
3520 const struct nfs_lock_context *l_ctx,
3521 fmode_t fmode)
3522{
3523 const struct nfs_lockowner *lockowner = NULL;
3524
3525 if (l_ctx != NULL)
3526 lockowner = &l_ctx->lockowner;
5521abfd 3527 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3528}
3529EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3530
5521abfd
TM		 3531static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3532 const struct nfs_open_context *ctx,
3533 const struct nfs_lock_context *l_ctx,
3534 fmode_t fmode)
3535{
3536 nfs4_stateid current_stateid;
3537
3538 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3539 return false;
3540 return nfs4_stateid_match(stateid, &current_stateid);
3541}
3542
3543static bool nfs4_error_stateid_expired(int err)
3544{
3545 switch (err) {
3546 case -NFS4ERR_DELEG_REVOKED:
3547 case -NFS4ERR_ADMIN_REVOKED:
3548 case -NFS4ERR_BAD_STATEID:
3549 case -NFS4ERR_STALE_STATEID:
3550 case -NFS4ERR_OLD_STATEID:
3551 case -NFS4ERR_OPENMODE:
3552 case -NFS4ERR_EXPIRED:
3553 return true;
3554 }
3555 return false;
3556}
3557
d20581aa
BH		 3558void __nfs4_read_done_cb(struct nfs_read_data *data)
3559{
cd841605 3560 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3561}
3562
cbdabc7f 3563static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3564{
cd841605 3565 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3566
9e33bed5 3567 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3568 rpc_restart_call_prepare(task);
ec06c096 3569 return -EAGAIN;
1da177e4 3570 }
8850df99 3571
d20581aa 3572 __nfs4_read_done_cb(data);
1da177e4 3573 if (task->tk_status > 0)
ec06c096
TM		 3574 renew_lease(server, data->timestamp);
3575 return 0;
1da177e4
LT		 3576}
3577
5521abfd
TM		 3578static bool nfs4_read_stateid_changed(struct rpc_task *task,
3579 struct nfs_readargs *args)
3580{
3581
3582 if (!nfs4_error_stateid_expired(task->tk_status) ||
3583 nfs4_stateid_is_current(&args->stateid,
3584 args->context,
3585 args->lock_context,
3586 FMODE_READ))
3587 return false;
3588 rpc_restart_call_prepare(task);
3589 return true;
3590}
3591
cbdabc7f
AA		 3592static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3593{
3594
3595 dprintk("--> %s\n", __func__);
3596
3597 if (!nfs4_sequence_done(task, &data->res.seq_res))
3598 return -EAGAIN;
5521abfd
TM		 3599 if (nfs4_read_stateid_changed(task, &data->args))
3600 return -EAGAIN;
d20581aa
BH		 3601 return data->read_done_cb ? data->read_done_cb(task, data) :
3602 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3603}
3604
bdc7f021 3605static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3606{
1da177e4 3607 data->timestamp = jiffies;
cbdabc7f 3608 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3609 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3610 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3611}
3612
ea7c3303
BS		 3613static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3614{
9b206149 3615 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3616 &data->args.seq_args,
3617 &data->res.seq_res,
9b206149
TM		 3618 task))
3619 return;
3620 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3621 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3622}
3623
b029bc9b 3624static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3625{
cd841605 3626 struct inode *inode = data->header->inode;
1da177e4 3627
9e33bed5 3628 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3629 rpc_restart_call_prepare(task);
788e7a89 3630 return -EAGAIN;
1da177e4 3631 }
4f9838c7 3632 if (task->tk_status >= 0) {
1da177e4 3633 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3634 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3635 }
788e7a89 3636 return 0;
1da177e4
LT		 3637}
3638
5521abfd
TM		 3639static bool nfs4_write_stateid_changed(struct rpc_task *task,
3640 struct nfs_writeargs *args)
3641{
3642
3643 if (!nfs4_error_stateid_expired(task->tk_status) ||
3644 nfs4_stateid_is_current(&args->stateid,
3645 args->context,
3646 args->lock_context,
3647 FMODE_WRITE))
3648 return false;
3649 rpc_restart_call_prepare(task);
3650 return true;
3651}
3652
b029bc9b
FI		 3653static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3654{
3655 if (!nfs4_sequence_done(task, &data->res.seq_res))
3656 return -EAGAIN;
5521abfd
TM		 3657 if (nfs4_write_stateid_changed(task, &data->args))
3658 return -EAGAIN;
d20581aa
BH		 3659 return data->write_done_cb ? data->write_done_cb(task, data) :
3660 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3661}
3662
5a37f851
TM		 3663static
3664bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3665{
5a37f851
TM		 3666 const struct nfs_pgio_header *hdr = data->header;
3667
3668 /* Don't request attributes for pNFS or O_DIRECT writes */
3669 if (data->ds_clp != NULL || hdr->dreq != NULL)
3670 return false;
3671 /* Otherwise, request attributes if and only if we don't hold
3672 * a delegation
3673 */
011e2a7f 3674 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3675}
a69aef14 3676
bdc7f021 3677static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3678{
cd841605 3679 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3680
5a37f851 3681 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3682 data->args.bitmask = NULL;
3683 data->res.fattr = NULL;
3684 } else
3685 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3686
b029bc9b
FI		 3687 if (!data->write_done_cb)
3688 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3689 data->res.server = server;
1da177e4
LT		 3690 data->timestamp = jiffies;
3691
bdc7f021 3692 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3693 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3694}
3695
c6cb80d0
BS		 3696static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3697{
9b206149 3698 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3699 &data->args.seq_args,
3700 &data->res.seq_res,
9b206149
TM		 3701 task))
3702 return;
3703 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3704 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 3705}
3706
0b7c0153 3707static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3708{
d9afbd1b
TM		 3709 nfs4_setup_sequence(NFS_SERVER(data->inode),
3710 &data->args.seq_args,
3711 &data->res.seq_res,
3712 task);
1da177e4
LT		 3713}
3714
0b7c0153 3715static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3716{
1da177e4 3717 struct inode *inode = data->inode;
14516c3a 3718
9e33bed5 3719 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3720 rpc_restart_call_prepare(task);
788e7a89 3721 return -EAGAIN;
1da177e4 3722 }
788e7a89 3723 return 0;
1da177e4
LT		 3724}
3725
0b7c0153 3726static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3727{
3728 if (!nfs4_sequence_done(task, &data->res.seq_res))
3729 return -EAGAIN;
0b7c0153 3730 return data->commit_done_cb(task, data);
5f452431
FI		 3731}
3732
0b7c0153 3733static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3734{
788e7a89 3735 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3736
0b7c0153
FI		 3737 if (data->commit_done_cb == NULL)
3738 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3739 data->res.server = server;
bdc7f021 3740 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3741 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3742}
3743
9bc4e3ca
CL		 3744struct nfs4_renewdata {
3745 struct nfs_client *client;
3746 unsigned long timestamp;
3747};
3748
1da177e4
LT		 3749/*
3750 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3751 * standalone procedure for queueing an asynchronous RENEW.
3752 */
9bc4e3ca 3753static void nfs4_renew_release(void *calldata)
dc96aef9 3754{
9bc4e3ca
CL		 3755 struct nfs4_renewdata *data = calldata;
3756 struct nfs_client *clp = data->client;
dc96aef9 3757
0851de06
AB		 3758 if (atomic_read(&clp->cl_count) > 1)
3759 nfs4_schedule_state_renewal(clp);
3760 nfs_put_client(clp);
9bc4e3ca 3761 kfree(data);
dc96aef9
AB		 3762}
3763
9bc4e3ca 3764static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3765{
9bc4e3ca
CL		 3766 struct nfs4_renewdata *data = calldata;
3767 struct nfs_client *clp = data->client;
3768 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3769
3770 if (task->tk_status < 0) {
95baa25c 3771 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3772 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3773 return;
3774 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3775 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3776 return;
3777 }
3778 nfs4_schedule_path_down_recovery(clp);
1da177e4 3779 }
452e9352 3780 do_renew_lease(clp, timestamp);
1da177e4
LT		 3781}
3782
963d8fe5
TM		 3783static const struct rpc_call_ops nfs4_renew_ops = {
3784 .rpc_call_done = nfs4_renew_done,
dc96aef9 3785 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3786};
3787
2f60ea6b 3788static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3789{
3790 struct rpc_message msg = {
3791 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3792 .rpc_argp = clp,
b4454fe1 3793 .rpc_cred = cred,
1da177e4 3794 };
9bc4e3ca 3795 struct nfs4_renewdata *data;
1da177e4 3796
2f60ea6b
TM		 3797 if (renew_flags == 0)
3798 return 0;
0851de06
AB		 3799 if (!atomic_inc_not_zero(&clp->cl_count))
3800 return -EIO;
b569ad34 3801 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3802 if (data == NULL)
3803 return -ENOMEM;
3804 data->client = clp;
3805 data->timestamp = jiffies;
bc7a05ca 3806 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 3807 &nfs4_renew_ops, data);
1da177e4
LT		 3808}
3809
8534d4ec 3810static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3811{
3812 struct rpc_message msg = {
3813 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3814 .rpc_argp = clp,
b4454fe1 3815 .rpc_cred = cred,
1da177e4
LT		 3816 };
3817 unsigned long now = jiffies;
3818 int status;
3819
bc7a05ca 3820 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 3821 if (status < 0)
3822 return status;
452e9352 3823 do_renew_lease(clp, now);
1da177e4
LT		 3824 return 0;
3825}
3826
aa1870af
BF		 3827static inline int nfs4_server_supports_acls(struct nfs_server *server)
3828{
3829 return (server->caps & NFS_CAP_ACLS)
3830 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3831 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3832}
3833
21f498c2
TM		 3834/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3835 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3836 * the stack.
3837 */
21f498c2 3838#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3839
e9e3d724
NH		 3840static int buf_to_pages_noslab(const void *buf, size_t buflen,
3841 struct page **pages, unsigned int *pgbase)
3842{
3843 struct page *newpage, **spages;
3844 int rc = 0;
3845 size_t len;
3846 spages = pages;
3847
3848 do {
21f498c2 3849 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3850 newpage = alloc_page(GFP_KERNEL);
3851
3852 if (newpage == NULL)
3853 goto unwind;
3854 memcpy(page_address(newpage), buf, len);
3855 buf += len;
3856 buflen -= len;
3857 *pages++ = newpage;
3858 rc++;
3859 } while (buflen != 0);
3860
3861 return rc;
3862
3863unwind:
3864 for(; rc > 0; rc--)
3865 __free_page(spages[rc-1]);
3866 return -ENOMEM;
3867}
3868
e50a1c2e
BF		 3869struct nfs4_cached_acl {
3870 int cached;
3871 size_t len;
3e9d4154 3872 char data[0];
e50a1c2e
BF		 3873};
3874
3875static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3876{
3877 struct nfs_inode *nfsi = NFS_I(inode);
3878
3879 spin_lock(&inode->i_lock);
3880 kfree(nfsi->nfs4_acl);
3881 nfsi->nfs4_acl = acl;
3882 spin_unlock(&inode->i_lock);
3883}
3884
3885static void nfs4_zap_acl_attr(struct inode *inode)
3886{
3887 nfs4_set_cached_acl(inode, NULL);
3888}
3889
3890static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3891{
3892 struct nfs_inode *nfsi = NFS_I(inode);
3893 struct nfs4_cached_acl *acl;
3894 int ret = -ENOENT;
3895
3896 spin_lock(&inode->i_lock);
3897 acl = nfsi->nfs4_acl;
3898 if (acl == NULL)
3899 goto out;
3900 if (buf == NULL) /* user is just asking for length */
3901 goto out_len;
3902 if (acl->cached == 0)
3903 goto out;
3904 ret = -ERANGE; /* see getxattr(2) man page */
3905 if (acl->len > buflen)
3906 goto out;
3907 memcpy(buf, acl->data, acl->len);
3908out_len:
3909 ret = acl->len;
3910out:
3911 spin_unlock(&inode->i_lock);
3912 return ret;
3913}
3914
5794d21e 3915static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3916{
3917 struct nfs4_cached_acl *acl;
b291f1b1 3918 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3919
1f1ea6c2 3920 if (buflen <= PAGE_SIZE) {
b291f1b1 3921 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3922 if (acl == NULL)
3923 goto out;
3924 acl->cached = 1;
5794d21e 3925 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3926 } else {
3927 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3928 if (acl == NULL)
3929 goto out;
3930 acl->cached = 0;
3931 }
3932 acl->len = acl_len;
3933out:
3934 nfs4_set_cached_acl(inode, acl);
3935}
3936
bf118a34
AA		 3937/*
3938 * The getxattr API returns the required buffer length when called with a
3939 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3940 * the required buf. On a NULL buf, we send a page of data to the server
3941 * guessing that the ACL request can be serviced by a page. If so, we cache
3942 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3943 * the cache. If not so, we throw away the page, and cache the required
3944 * length. The next getxattr call will then produce another round trip to
3945 * the server, this time with the input buf of the required size.
3946 */
16b4289c 3947static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3948{
bf118a34 3949 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3950 struct nfs_getaclargs args = {
3951 .fh = NFS_FH(inode),
3952 .acl_pages = pages,
3953 .acl_len = buflen,
3954 };
663c79b3
BH		 3955 struct nfs_getaclres res = {
3956 .acl_len = buflen,
3957 };
aa1870af
BF		 3958 struct rpc_message msg = {
3959 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3960 .rpc_argp = &args,
663c79b3 3961 .rpc_resp = &res,
aa1870af 3962 };
21f498c2
TM		 3963 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3964 int ret = -ENOMEM, i;
aa1870af 3965
bf118a34
AA		 3966 /* As long as we're doing a round trip to the server anyway,
3967 * let's be prepared for a page of acl data. */
3968 if (npages == 0)
3969 npages = 1;
21f498c2
TM		 3970 if (npages > ARRAY_SIZE(pages))
3971 return -ERANGE;
5a006899 3972
bf118a34
AA		 3973 for (i = 0; i < npages; i++) {
3974 pages[i] = alloc_page(GFP_KERNEL);
3975 if (!pages[i])
3976 goto out_free;
e50a1c2e 3977 }
5a006899
SP		 3978
3979 /* for decoding across pages */
3980 res.acl_scratch = alloc_page(GFP_KERNEL);
3981 if (!res.acl_scratch)
3982 goto out_free;
3983
bf118a34
AA		 3984 args.acl_len = npages * PAGE_SIZE;
3985 args.acl_pgbase = 0;
5a006899 3986
de040bec 3987 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3988 __func__, buf, buflen, npages, args.acl_len);
3989 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3990 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3991 if (ret)
3992 goto out_free;
bf118a34 3993
1f1ea6c2
TM		 3994 /* Handle the case where the passed-in buffer is too short */
3995 if (res.acl_flags & NFS4_ACL_TRUNC) {
3996 /* Did the user only issue a request for the acl length? */
3997 if (buf == NULL)
3998 goto out_ok;
e50a1c2e 3999 ret = -ERANGE;
1f1ea6c2 4000 goto out_free;
e50a1c2e 4001 }
1f1ea6c2 4002 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4003 if (buf) {
4004 if (res.acl_len > buflen) {
4005 ret = -ERANGE;
4006 goto out_free;
4007 }
1f1ea6c2 4008 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4009 }
1f1ea6c2
TM		 4010out_ok:
4011 ret = res.acl_len;
e50a1c2e 4012out_free:
bf118a34
AA		 4013 for (i = 0; i < npages; i++)
4014 if (pages[i])
4015 __free_page(pages[i]);
331818f1
TM		 4016 if (res.acl_scratch)
4017 __free_page(res.acl_scratch);
aa1870af
BF		 4018 return ret;
4019}
4020
16b4289c
TM		 4021static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4022{
4023 struct nfs4_exception exception = { };
4024 ssize_t ret;
4025 do {
4026 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
4027 if (ret >= 0)
4028 break;
4029 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4030 } while (exception.retry);
4031 return ret;
4032}
4033
e50a1c2e
BF		 4034static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4035{
4036 struct nfs_server *server = NFS_SERVER(inode);
4037 int ret;
4038
4039 if (!nfs4_server_supports_acls(server))
4040 return -EOPNOTSUPP;
4041 ret = nfs_revalidate_inode(server, inode);
4042 if (ret < 0)
4043 return ret;
08a22b39
AK		 4044 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4045 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4046 ret = nfs4_read_cached_acl(inode, buf, buflen);
4047 if (ret != -ENOENT)
bf118a34
AA		 4048 /* -ENOENT is returned if there is no ACL or if there is an ACL
4049 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4050 return ret;
4051 return nfs4_get_acl_uncached(inode, buf, buflen);
4052}
4053
16b4289c 4054static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4055{
4056 struct nfs_server *server = NFS_SERVER(inode);
4057 struct page *pages[NFS4ACL_MAXPAGES];
4058 struct nfs_setaclargs arg = {
4059 .fh = NFS_FH(inode),
4060 .acl_pages = pages,
4061 .acl_len = buflen,
4062 };
73c403a9 4063 struct nfs_setaclres res;
4b580ee3
BF		 4064 struct rpc_message msg = {
4065 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4066 .rpc_argp = &arg,
73c403a9 4067 .rpc_resp = &res,
4b580ee3 4068 };
21f498c2 4069 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4070 int ret, i;
4b580ee3
BF		 4071
4072 if (!nfs4_server_supports_acls(server))
4073 return -EOPNOTSUPP;
21f498c2
TM		 4074 if (npages > ARRAY_SIZE(pages))
4075 return -ERANGE;
e9e3d724
NH		 4076 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4077 if (i < 0)
4078 return i;
57ec14c5 4079 nfs4_inode_return_delegation(inode);
7c513058 4080 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4081
4082 /*
4083 * Free each page after tx, so the only ref left is
4084 * held by the network stack
4085 */
4086 for (; i > 0; i--)
4087 put_page(pages[i-1]);
4088
08a22b39
AK		 4089 /*
4090 * Acl update can result in inode attribute update.
4091 * so mark the attribute cache invalid.
4092 */
4093 spin_lock(&inode->i_lock);
4094 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4095 spin_unlock(&inode->i_lock);
f41f7418
TM		 4096 nfs_access_zap_cache(inode);
4097 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4098 return ret;
4099}
4100
16b4289c
TM		 4101static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4102{
4103 struct nfs4_exception exception = { };
4104 int err;
4105 do {
4106 err = nfs4_handle_exception(NFS_SERVER(inode),
4107 __nfs4_proc_set_acl(inode, buf, buflen),
4108 &exception);
4109 } while (exception.retry);
4110 return err;
4111}
4112
1da177e4 4113static int
aa5190d0 4114nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4115{
aa5190d0
TM		 4116 struct nfs_client *clp = server->nfs_client;
4117
4118 if (task->tk_status >= 0)
1da177e4
LT		 4119 return 0;
4120 switch(task->tk_status) {
a1d0b5ee 4121 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4122 case -NFS4ERR_ADMIN_REVOKED:
4123 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4124 if (state == NULL)
4125 break;
4126 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4127 case -NFS4ERR_OPENMODE:
4128 if (state == NULL)
4129 break;
5d422301
TM		 4130 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4131 goto stateid_invalid;
0400a6b0 4132 goto wait_on_recovery;
0ced63d1 4133 case -NFS4ERR_EXPIRED:
5d422301
TM		 4134 if (state != NULL) {
4135 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4136 goto stateid_invalid;
4137 }
1da177e4 4138 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4139 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4140 nfs4_schedule_lease_recovery(clp);
4141 goto wait_on_recovery;
4745e315
AA		 4142#if defined(CONFIG_NFS_V4_1)
4143 case -NFS4ERR_BADSESSION:
4144 case -NFS4ERR_BADSLOT:
4145 case -NFS4ERR_BAD_HIGH_SLOT:
4146 case -NFS4ERR_DEADSESSION:
4147 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4148 case -NFS4ERR_SEQ_FALSE_RETRY:
4149 case -NFS4ERR_SEQ_MISORDERED:
4150 dprintk("%s ERROR %d, Reset session\n", __func__,
4151 task->tk_status);
9f594791 4152 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4153 task->tk_status = 0;
4154 return -EAGAIN;
4155#endif /* CONFIG_NFS_V4_1 */
1da177e4 4156 case -NFS4ERR_DELAY:
aa5190d0 4157 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4158 case -NFS4ERR_GRACE:
1da177e4
LT		 4159 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4160 task->tk_status = 0;
4161 return -EAGAIN;
a8a4ae3a 4162 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4163 case -NFS4ERR_OLD_STATEID:
4164 task->tk_status = 0;
4165 return -EAGAIN;
4166 }
4167 task->tk_status = nfs4_map_errors(task->tk_status);
4168 return 0;
5d422301
TM		 4169stateid_invalid:
4170 task->tk_status = -EIO;
4171 return 0;
0400a6b0 4172wait_on_recovery:
a2c0b9e2 4173 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4174 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4175 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4176 task->tk_status = 0;
4177 return -EAGAIN;
1da177e4
LT		 4178}
4179
f092075d
CL		 4180static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4181 nfs4_verifier *bootverf)
cd93710e
CL		 4182{
4183 __be32 verf[2];
4184
2c820d9a
CL		 4185 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4186 /* An impossible timestamp guarantees this value
4187 * will never match a generated boot time. */
4188 verf[0] = 0;
4189 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4190 } else {
f092075d
CL		 4191 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4192 verf[0] = (__be32)nn->boot_time.tv_sec;
4193 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4194 }
cd93710e
CL		 4195 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4196}
4197
e984a55a
CL		 4198static unsigned int
4199nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4200 char *buf, size_t len)
4201{
4202 unsigned int result;
4203
4204 rcu_read_lock();
4205 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4206 clp->cl_ipaddr,
4207 rpc_peeraddr2str(clp->cl_rpcclient,
4208 RPC_DISPLAY_ADDR),
4209 rpc_peeraddr2str(clp->cl_rpcclient,
4210 RPC_DISPLAY_PROTO));
4211 rcu_read_unlock();
4212 return result;
4213}
4214
4215static unsigned int
4216nfs4_init_uniform_client_string(const struct nfs_client *clp,
4217 char *buf, size_t len)
4218{
6f2ea7f2
CL		 4219 char *nodename = clp->cl_rpcclient->cl_nodename;
4220
4221 if (nfs4_client_id_uniquifier[0] != '\0')
4222 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4223 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4224 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4225 nodename);
e984a55a
CL		 4226}
4227
6bbb4ae8
CL		 4228/**
4229 * nfs4_proc_setclientid - Negotiate client ID
4230 * @clp: state data structure
4231 * @program: RPC program for NFSv4 callback service
4232 * @port: IP port number for NFS4 callback service
4233 * @cred: RPC credential to use for this call
4234 * @res: where to place the result
4235 *
4236 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4237 */
bb8b27e5
TM		 4238int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4239 unsigned short port, struct rpc_cred *cred,
4240 struct nfs4_setclientid_res *res)
1da177e4
LT		 4241{
4242 nfs4_verifier sc_verifier;
4243 struct nfs4_setclientid setclientid = {
4244 .sc_verifier = &sc_verifier,
4245 .sc_prog = program,
f4eecd5d 4246 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4247 };
4248 struct rpc_message msg = {
4249 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4250 .rpc_argp = &setclientid,
bb8b27e5 4251 .rpc_resp = res,
286d7d6a 4252 .rpc_cred = cred,
1da177e4 4253 };
6bbb4ae8 4254 int status;
1da177e4 4255
de734831 4256 /* nfs_client_id4 */
f092075d 4257 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4258 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4259 setclientid.sc_name_len =
4260 nfs4_init_uniform_client_string(clp,
4261 setclientid.sc_name,
4262 sizeof(setclientid.sc_name));
4263 else
4264 setclientid.sc_name_len =
4265 nfs4_init_nonuniform_client_string(clp,
4266 setclientid.sc_name,
4267 sizeof(setclientid.sc_name));
de734831 4268 /* cb_client4 */
e984a55a 4269 rcu_read_lock();
de734831 4270 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4271 sizeof(setclientid.sc_netid),
4272 rpc_peeraddr2str(clp->cl_rpcclient,
4273 RPC_DISPLAY_NETID));
de734831
CL		 4274 rcu_read_unlock();
4275 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4276 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4277 clp->cl_ipaddr, port >> 8, port & 255);
4278
6bbb4ae8
CL		 4279 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4280 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4281 setclientid.sc_name_len, setclientid.sc_name);
4282 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4283 dprintk("NFS reply setclientid: %d\n", status);
4284 return status;
1da177e4
LT		 4285}
4286
6bbb4ae8
CL		 4287/**
4288 * nfs4_proc_setclientid_confirm - Confirm client ID
4289 * @clp: state data structure
4290 * @res: result of a previous SETCLIENTID
4291 * @cred: RPC credential to use for this call
4292 *
4293 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4294 */
fd954ae1 4295int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4296 struct nfs4_setclientid_res *arg,
4297 struct rpc_cred *cred)
1da177e4
LT		 4298{
4299 struct nfs_fsinfo fsinfo;
4300 struct rpc_message msg = {
4301 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4302 .rpc_argp = arg,
1da177e4 4303 .rpc_resp = &fsinfo,
286d7d6a 4304 .rpc_cred = cred,
1da177e4
LT		 4305 };
4306 unsigned long now;
4307 int status;
4308
6bbb4ae8
CL		 4309 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4310 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4311 clp->cl_clientid);
1da177e4 4312 now = jiffies;
1bd714f2 4313 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4314 if (status == 0) {
4315 spin_lock(&clp->cl_lock);
4316 clp->cl_lease_time = fsinfo.lease_time * HZ;
4317 clp->cl_last_renewal = now;
4318 spin_unlock(&clp->cl_lock);
4319 }
6bbb4ae8 4320 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4321 return status;
4322}
4323
fe650407
TM		 4324struct nfs4_delegreturndata {
4325 struct nfs4_delegreturnargs args;
fa178f29 4326 struct nfs4_delegreturnres res;
fe650407
TM		 4327 struct nfs_fh fh;
4328 nfs4_stateid stateid;
26e976a8 4329 unsigned long timestamp;
fa178f29 4330 struct nfs_fattr fattr;
fe650407
TM		 4331 int rpc_status;
4332};
4333
fe650407
TM		 4334static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4335{
4336 struct nfs4_delegreturndata *data = calldata;
938e1010 4337
14516c3a
TM		 4338 if (!nfs4_sequence_done(task, &data->res.seq_res))
4339 return;
938e1010 4340
79708861
RL		 4341 switch (task->tk_status) {
4342 case -NFS4ERR_STALE_STATEID:
4343 case -NFS4ERR_EXPIRED:
4344 case 0:
fa178f29 4345 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4346 break;
4347 default:
4348 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4349 -EAGAIN) {
d00c5d43 4350 rpc_restart_call_prepare(task);
79708861
RL		 4351 return;
4352 }
4353 }
4354 data->rpc_status = task->tk_status;
fe650407
TM		 4355}
4356
4357static void nfs4_delegreturn_release(void *calldata)
4358{
fe650407
TM		 4359 kfree(calldata);
4360}
4361
938e1010
AA		 4362#if defined(CONFIG_NFS_V4_1)
4363static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4364{
4365 struct nfs4_delegreturndata *d_data;
4366
4367 d_data = (struct nfs4_delegreturndata *)data;
4368
d9afbd1b
TM		 4369 nfs4_setup_sequence(d_data->res.server,
4370 &d_data->args.seq_args,
4371 &d_data->res.seq_res,
4372 task);
938e1010
AA		 4373}
4374#endif /* CONFIG_NFS_V4_1 */
4375
c8d149f3 4376static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4377#if defined(CONFIG_NFS_V4_1)
4378 .rpc_call_prepare = nfs4_delegreturn_prepare,
4379#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4380 .rpc_call_done = nfs4_delegreturn_done,
4381 .rpc_release = nfs4_delegreturn_release,
4382};
4383
e6f81075 4384static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4385{
4386 struct nfs4_delegreturndata *data;
fa178f29 4387 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4388 struct rpc_task *task;
5138fde0
TM		 4389 struct rpc_message msg = {
4390 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4391 .rpc_cred = cred,
4392 };
c970aa85
TM		 4393 struct rpc_task_setup task_setup_data = {
4394 .rpc_client = server->client,
5138fde0 4395 .rpc_message = &msg,
c970aa85
TM		 4396 .callback_ops = &nfs4_delegreturn_ops,
4397 .flags = RPC_TASK_ASYNC,
4398 };
e6f81075 4399 int status = 0;
fe650407 4400
8535b2be 4401 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4402 if (data == NULL)
4403 return -ENOMEM;
9d12b216 4404 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4405 data->args.fhandle = &data->fh;
4406 data->args.stateid = &data->stateid;
9e907fec 4407 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4408 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4409 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4410 data->res.fattr = &data->fattr;
4411 data->res.server = server;
5138fde0 4412 nfs_fattr_init(data->res.fattr);
26e976a8 4413 data->timestamp = jiffies;
fe650407
TM		 4414 data->rpc_status = 0;
4415
c970aa85 4416 task_setup_data.callback_data = data;
1174dd1f
TM		 4417 msg.rpc_argp = &data->args;
4418 msg.rpc_resp = &data->res;
c970aa85 4419 task = rpc_run_task(&task_setup_data);
7a1218a2 4420 if (IS_ERR(task))
fe650407 4421 return PTR_ERR(task);
e6f81075
TM		 4422 if (!issync)
4423 goto out;
fe650407 4424 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4425 if (status != 0)
4426 goto out;
4427 status = data->rpc_status;
e144cbcc
TM		 4428 if (status == 0)
4429 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4430 else
4431 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4432out:
e6b3c4db 4433 rpc_put_task(task);
fe650407 4434 return status;
1da177e4
LT		 4435}
4436
e6f81075 4437int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4438{
4439 struct nfs_server *server = NFS_SERVER(inode);
4440 struct nfs4_exception exception = { };
4441 int err;
4442 do {
e6f81075 4443 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4444 switch (err) {
4445 case -NFS4ERR_STALE_STATEID:
4446 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4447 case 0:
4448 return 0;
4449 }
4450 err = nfs4_handle_exception(server, err, &exception);
4451 } while (exception.retry);
4452 return err;
4453}
4454
4455#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4456#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4457
4458/*
4459 * sleep, with exponential backoff, and retry the LOCK operation.
4460 */
4461static unsigned long
4462nfs4_set_lock_task_retry(unsigned long timeout)
4463{
d310310c 4464 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4465 timeout <<= 1;
4466 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4467 return NFS4_LOCK_MAXTIMEOUT;
4468 return timeout;
4469}
4470
1da177e4
LT		 4471static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4472{
4473 struct inode *inode = state->inode;
4474 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4475 struct nfs_client *clp = server->nfs_client;
911d1aaf 4476 struct nfs_lockt_args arg = {
1da177e4 4477 .fh = NFS_FH(inode),
911d1aaf 4478 .fl = request,
1da177e4 4479 };
911d1aaf
TM		 4480 struct nfs_lockt_res res = {
4481 .denied = request,
1da177e4
LT		 4482 };
4483 struct rpc_message msg = {
4484 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4485 .rpc_argp = &arg,
4486 .rpc_resp = &res,
4487 .rpc_cred = state->owner->so_cred,
4488 };
1da177e4
LT		 4489 struct nfs4_lock_state *lsp;
4490 int status;
4491
911d1aaf 4492 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4493 status = nfs4_set_lock_state(state, request);
4494 if (status != 0)
4495 goto out;
4496 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4497 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4498 arg.lock_owner.s_dev = server->s_dev;
7c513058 4499 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4500 switch (status) {
4501 case 0:
4502 request->fl_type = F_UNLCK;
4503 break;
4504 case -NFS4ERR_DENIED:
4505 status = 0;
1da177e4 4506 }
70cc6487 4507 request->fl_ops->fl_release_private(request);
8d0a8a9d 4508out:
1da177e4
LT		 4509 return status;
4510}
4511
4512static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4513{
4514 struct nfs4_exception exception = { };
4515 int err;
4516
4517 do {
4518 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4519 _nfs4_proc_getlk(state, cmd, request),
4520 &exception);
4521 } while (exception.retry);
4522 return err;
4523}
4524
4525static int do_vfs_lock(struct file *file, struct file_lock *fl)
4526{
4527 int res = 0;
4528 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4529 case FL_POSIX:
4530 res = posix_lock_file_wait(file, fl);
4531 break;
4532 case FL_FLOCK:
4533 res = flock_lock_file_wait(file, fl);
4534 break;
4535 default:
4536 BUG();
4537 }
1da177e4
LT		 4538 return res;
4539}
4540
faf5f49c 4541struct nfs4_unlockdata {
911d1aaf
TM		 4542 struct nfs_locku_args arg;
4543 struct nfs_locku_res res;
faf5f49c
TM		 4544 struct nfs4_lock_state *lsp;
4545 struct nfs_open_context *ctx;
911d1aaf
TM		 4546 struct file_lock fl;
4547 const struct nfs_server *server;
26e976a8 4548 unsigned long timestamp;
faf5f49c
TM		 4549};
4550
911d1aaf
TM		 4551static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4552 struct nfs_open_context *ctx,
4553 struct nfs4_lock_state *lsp,
4554 struct nfs_seqid *seqid)
4555{
4556 struct nfs4_unlockdata *p;
4557 struct inode *inode = lsp->ls_state->inode;
4558
8535b2be 4559 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4560 if (p == NULL)
4561 return NULL;
4562 p->arg.fh = NFS_FH(inode);
4563 p->arg.fl = &p->fl;
4564 p->arg.seqid = seqid;
c1d51931 4565 p->res.seqid = seqid;
911d1aaf
TM		 4566 p->arg.stateid = &lsp->ls_stateid;
4567 p->lsp = lsp;
4568 atomic_inc(&lsp->ls_count);
4569 /* Ensure we don't close file until we're done freeing locks! */
4570 p->ctx = get_nfs_open_context(ctx);
4571 memcpy(&p->fl, fl, sizeof(p->fl));
4572 p->server = NFS_SERVER(inode);
4573 return p;
4574}
4575
06f814a3 4576static void nfs4_locku_release_calldata(void *data)
faf5f49c 4577{
963d8fe5 4578 struct nfs4_unlockdata *calldata = data;
911d1aaf 4579 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4580 nfs4_put_lock_state(calldata->lsp);
4581 put_nfs_open_context(calldata->ctx);
4582 kfree(calldata);
faf5f49c
TM		 4583}
4584
963d8fe5 4585static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4586{
963d8fe5 4587 struct nfs4_unlockdata *calldata = data;
faf5f49c 4588
14516c3a
TM		 4589 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4590 return;
faf5f49c
TM		 4591 switch (task->tk_status) {
4592 case 0:
f597c537
TM		 4593 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4594 &calldata->res.stateid);
26e976a8 4595 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4596 break;
9e33bed5
TM		 4597 case -NFS4ERR_BAD_STATEID:
4598 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4599 case -NFS4ERR_STALE_STATEID:
4600 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4601 break;
4602 default:
9e33bed5 4603 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4604 rpc_restart_call_prepare(task);
faf5f49c 4605 }
2b1bc308 4606 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4607}
4608
4ce70ada 4609static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4610{
4ce70ada 4611 struct nfs4_unlockdata *calldata = data;
faf5f49c 4612
911d1aaf 4613 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 4614 goto out_wait;
795a88c9 4615 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 4616 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 4617 goto out_no_action;
faf5f49c 4618 }
26e976a8 4619 calldata->timestamp = jiffies;
035168ab 4620 if (nfs4_setup_sequence(calldata->server,
a893693c 4621 &calldata->arg.seq_args,
2240a9e2
TM		 4622 &calldata->res.seq_res,
4623 task) != 0)
4624 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 4625 return;
4626out_no_action:
4627 task->tk_action = NULL;
4628out_wait:
4629 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4630}
4631
963d8fe5 4632static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4633 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4634 .rpc_call_done = nfs4_locku_done,
06f814a3 4635 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4636};
4637
a5d16a4d
TM		 4638static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4639 struct nfs_open_context *ctx,
4640 struct nfs4_lock_state *lsp,
4641 struct nfs_seqid *seqid)
4642{
4643 struct nfs4_unlockdata *data;
5138fde0
TM		 4644 struct rpc_message msg = {
4645 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4646 .rpc_cred = ctx->cred,
4647 };
c970aa85
TM		 4648 struct rpc_task_setup task_setup_data = {
4649 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4650 .rpc_message = &msg,
c970aa85 4651 .callback_ops = &nfs4_locku_ops,
101070ca 4652 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4653 .flags = RPC_TASK_ASYNC,
4654 };
a5d16a4d 4655
137d6aca
FF		 4656 /* Ensure this is an unlock - when canceling a lock, the
4657 * canceled lock is passed in, and it won't be an unlock.
4658 */
4659 fl->fl_type = F_UNLCK;
4660
a5d16a4d
TM		 4661 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4662 if (data == NULL) {
4663 nfs_free_seqid(seqid);
4664 return ERR_PTR(-ENOMEM);
4665 }
4666
9d12b216 4667 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4668 msg.rpc_argp = &data->arg;
4669 msg.rpc_resp = &data->res;
c970aa85
TM		 4670 task_setup_data.callback_data = data;
4671 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4672}
4673
faf5f49c
TM		 4674static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4675{
65b62a29
TM		 4676 struct inode *inode = state->inode;
4677 struct nfs4_state_owner *sp = state->owner;
4678 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 4679 struct nfs_seqid *seqid;
1da177e4 4680 struct nfs4_lock_state *lsp;
06f814a3
TM		 4681 struct rpc_task *task;
4682 int status = 0;
536ff0f8 4683 unsigned char fl_flags = request->fl_flags;
faf5f49c 4684
8d0a8a9d 4685 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4686 /* Unlock _before_ we do the RPC call */
4687 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 4688 /* Exclude nfs_delegation_claim_locks() */
4689 mutex_lock(&sp->so_delegreturn_mutex);
4690 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 4691 down_read(&nfsi->rwsem);
4692 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4693 up_read(&nfsi->rwsem);
65b62a29 4694 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 4695 goto out;
19e03c57
TM		 4696 }
4697 up_read(&nfsi->rwsem);
65b62a29 4698 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 4699 if (status != 0)
9b073574
TM		 4700 goto out;
4701 /* Is this a delegated lock? */
4702 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4703 goto out;
8d0a8a9d 4704 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4705 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4706 status = -ENOMEM;
911d1aaf 4707 if (seqid == NULL)
9b073574 4708 goto out;
cd3758e3 4709 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4710 status = PTR_ERR(task);
4711 if (IS_ERR(task))
9b073574 4712 goto out;
a5d16a4d 4713 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4714 rpc_put_task(task);
9b073574 4715out:
536ff0f8 4716 request->fl_flags = fl_flags;
1da177e4
LT		 4717 return status;
4718}
4719
a5d16a4d
TM		 4720struct nfs4_lockdata {
4721 struct nfs_lock_args arg;
4722 struct nfs_lock_res res;
4723 struct nfs4_lock_state *lsp;
4724 struct nfs_open_context *ctx;
4725 struct file_lock fl;
26e976a8 4726 unsigned long timestamp;
a5d16a4d
TM		 4727 int rpc_status;
4728 int cancelled;
66179efe 4729 struct nfs_server *server;
a5d16a4d
TM		 4730};
4731
4732static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4733 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4734 gfp_t gfp_mask)
1da177e4 4735{
a5d16a4d
TM		 4736 struct nfs4_lockdata *p;
4737 struct inode *inode = lsp->ls_state->inode;
1da177e4 4738 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4739
8535b2be 4740 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4741 if (p == NULL)
4742 return NULL;
4743
4744 p->arg.fh = NFS_FH(inode);
4745 p->arg.fl = &p->fl;
8535b2be 4746 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4747 if (p->arg.open_seqid == NULL)
4748 goto out_free;
8535b2be 4749 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4750 if (p->arg.lock_seqid == NULL)
2f74c0a0 4751 goto out_free_seqid;
a5d16a4d 4752 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4753 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4754 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4755 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4756 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4757 p->lsp = lsp;
66179efe 4758 p->server = server;
a5d16a4d
TM		 4759 atomic_inc(&lsp->ls_count);
4760 p->ctx = get_nfs_open_context(ctx);
4761 memcpy(&p->fl, fl, sizeof(p->fl));
4762 return p;
2f74c0a0
TM		 4763out_free_seqid:
4764 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4765out_free:
4766 kfree(p);
4767 return NULL;
4768}
4769
4770static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4771{
4772 struct nfs4_lockdata *data = calldata;
4773 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4774
3110ff80 4775 dprintk("%s: begin!\n", __func__);
2f74c0a0 4776 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 4777 goto out_wait;
a5d16a4d
TM		 4778 /* Do we need to do an open_to_lock_owner? */
4779 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4780 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4781 goto out_release_lock_seqid;
8fe72bac 4782 }
a5d16a4d
TM		 4783 data->arg.open_stateid = &state->stateid;
4784 data->arg.new_lock_owner = 1;
c1d51931 4785 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4786 } else
4787 data->arg.new_lock_owner = 0;
5d422301
TM		 4788 if (!nfs4_valid_open_stateid(state)) {
4789 data->rpc_status = -EBADF;
4790 task->tk_action = NULL;
4791 goto out_release_open_seqid;
4792 }
26e976a8 4793 data->timestamp = jiffies;
035168ab
TM		 4794 if (nfs4_setup_sequence(data->server,
4795 &data->arg.seq_args,
2240a9e2 4796 &data->res.seq_res,
d9afbd1b 4797 task) == 0)
66179efe 4798 return;
5d422301 4799out_release_open_seqid:
2240a9e2
TM		 4800 nfs_release_seqid(data->arg.open_seqid);
4801out_release_lock_seqid:
4802 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 4803out_wait:
4804 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 4805 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4806}
4807
a5d16a4d
TM		 4808static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4809{
4810 struct nfs4_lockdata *data = calldata;
4811
3110ff80 4812 dprintk("%s: begin!\n", __func__);
a5d16a4d 4813
14516c3a
TM		 4814 if (!nfs4_sequence_done(task, &data->res.seq_res))
4815 return;
66179efe 4816
a5d16a4d 4817 data->rpc_status = task->tk_status;
a5d16a4d 4818 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4819 if (data->rpc_status == 0)
4820 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4821 else
4822 goto out;
4823 }
4824 if (data->rpc_status == 0) {
f597c537 4825 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4826 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4827 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4828 }
a5d16a4d 4829out:
3110ff80 4830 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4831}
4832
4833static void nfs4_lock_release(void *calldata)
4834{
4835 struct nfs4_lockdata *data = calldata;
4836
3110ff80 4837 dprintk("%s: begin!\n", __func__);
2f74c0a0 4838 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4839 if (data->cancelled != 0) {
4840 struct rpc_task *task;
4841 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4842 data->arg.lock_seqid);
4843 if (!IS_ERR(task))
bf294b41 4844 rpc_put_task_async(task);
3110ff80 4845 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4846 } else
4847 nfs_free_seqid(data->arg.lock_seqid);
4848 nfs4_put_lock_state(data->lsp);
4849 put_nfs_open_context(data->ctx);
4850 kfree(data);
3110ff80 4851 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4852}
4853
4854static const struct rpc_call_ops nfs4_lock_ops = {
4855 .rpc_call_prepare = nfs4_lock_prepare,
4856 .rpc_call_done = nfs4_lock_done,
4857 .rpc_release = nfs4_lock_release,
4858};
4859
2bee72a6
TM		 4860static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4861{
2bee72a6
TM		 4862 switch (error) {
4863 case -NFS4ERR_ADMIN_REVOKED:
4864 case -NFS4ERR_BAD_STATEID:
ecac799a 4865 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4866 if (new_lock_owner != 0 ||
795a88c9 4867 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4868 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4869 break;
4870 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4871 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4872 case -NFS4ERR_EXPIRED:
4873 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4874 };
4875}
4876
afe6c27c 4877static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4878{
4879 struct nfs4_lockdata *data;
4880 struct rpc_task *task;
5138fde0
TM		 4881 struct rpc_message msg = {
4882 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4883 .rpc_cred = state->owner->so_cred,
4884 };
c970aa85
TM		 4885 struct rpc_task_setup task_setup_data = {
4886 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4887 .rpc_message = &msg,
c970aa85 4888 .callback_ops = &nfs4_lock_ops,
101070ca 4889 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4890 .flags = RPC_TASK_ASYNC,
4891 };
a5d16a4d
TM		 4892 int ret;
4893
3110ff80 4894 dprintk("%s: begin!\n", __func__);
cd3758e3 4895 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4896 fl->fl_u.nfs4_fl.owner,
4897 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4898 if (data == NULL)
4899 return -ENOMEM;
4900 if (IS_SETLKW(cmd))
4901 data->arg.block = 1;
9d12b216 4902 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4903 msg.rpc_argp = &data->arg;
4904 msg.rpc_resp = &data->res;
c970aa85 4905 task_setup_data.callback_data = data;
8fe72bac
TM		 4906 if (recovery_type > NFS_LOCK_NEW) {
4907 if (recovery_type == NFS_LOCK_RECLAIM)
4908 data->arg.reclaim = NFS_LOCK_RECLAIM;
4909 nfs4_set_sequence_privileged(&data->arg.seq_args);
4910 }
c970aa85 4911 task = rpc_run_task(&task_setup_data);
7a1218a2 4912 if (IS_ERR(task))
a5d16a4d 4913 return PTR_ERR(task);
a5d16a4d
TM		 4914 ret = nfs4_wait_for_completion_rpc_task(task);
4915 if (ret == 0) {
4916 ret = data->rpc_status;
2bee72a6
TM		 4917 if (ret)
4918 nfs4_handle_setlk_error(data->server, data->lsp,
4919 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4920 } else
4921 data->cancelled = 1;
e6b3c4db 4922 rpc_put_task(task);
3110ff80 4923 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4924 return ret;
1da177e4
LT		 4925}
4926
4927static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4928{
202b50dc 4929 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4930 struct nfs4_exception exception = {
4931 .inode = state->inode,
4932 };
202b50dc
TM		 4933 int err;
4934
4935 do {
42a2d13e
TM		 4936 /* Cache the lock if possible... */
4937 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4938 return 0;
afe6c27c 4939 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4940 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4941 break;
4942 nfs4_handle_exception(server, err, &exception);
4943 } while (exception.retry);
4944 return err;
1da177e4
LT		 4945}
4946
4947static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4948{
202b50dc 4949 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4950 struct nfs4_exception exception = {
4951 .inode = state->inode,
4952 };
202b50dc
TM		 4953 int err;
4954
6bfc93ef
TM		 4955 err = nfs4_set_lock_state(state, request);
4956 if (err != 0)
4957 return err;
202b50dc 4958 do {
42a2d13e
TM		 4959 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4960 return 0;
afe6c27c 4961 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4962 switch (err) {
4963 default:
4964 goto out;
4965 case -NFS4ERR_GRACE:
4966 case -NFS4ERR_DELAY:
4967 nfs4_handle_exception(server, err, &exception);
4968 err = 0;
4969 }
202b50dc 4970 } while (exception.retry);
a9ed2e25 4971out:
202b50dc 4972 return err;
1da177e4
LT		 4973}
4974
f062eb6c 4975#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 4976/**
4977 * nfs41_check_expired_locks - possibly free a lock stateid
4978 *
4979 * @state: NFSv4 state for an inode
4980 *
4981 * Returns NFS_OK if recovery for this stateid is now finished.
4982 * Otherwise a negative NFS4ERR value is returned.
4983 */
b01dd1d8 4984static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4985{
eb64cf96 4986 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 4987 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4988 struct nfs_server *server = NFS_SERVER(state->inode);
4989
b01dd1d8 4990 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 4991 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 4992 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4993 if (status != NFS_OK) {
3e60ffdd
CL		 4994 /* Free the stateid unless the server
4995 * informs us the stateid is unrecognized. */
89af2739
CL		 4996 if (status != -NFS4ERR_BAD_STATEID)
4997 nfs41_free_stateid(server,
4998 &lsp->ls_stateid);
795a88c9 4999 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5000 ret = status;
5001 }
5002 }
5003 };
5004
5005 return ret;
5006}
5007
5008static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5009{
5010 int status = NFS_OK;
5011
5012 if (test_bit(LK_STATE_IN_USE, &state->flags))
5013 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5014 if (status != NFS_OK)
5015 status = nfs4_lock_expired(state, request);
5016 return status;
f062eb6c
BS		 5017}
5018#endif
5019
1da177e4
LT		 5020static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5021{
9a99af49 5022 struct nfs4_state_owner *sp = state->owner;
19e03c57 5023 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5024 unsigned char fl_flags = request->fl_flags;
9a99af49 5025 unsigned int seq;
8e469ebd 5026 int status = -ENOLCK;
1da177e4 5027
8e469ebd
TM		 5028 if ((fl_flags & FL_POSIX) &&
5029 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5030 goto out;
6bfc93ef 5031 /* Is this a delegated open? */
6bfc93ef
TM		 5032 status = nfs4_set_lock_state(state, request);
5033 if (status != 0)
5034 goto out;
01c3b861
TM		 5035 request->fl_flags |= FL_ACCESS;
5036 status = do_vfs_lock(request->fl_file, request);
5037 if (status < 0)
5038 goto out;
19e03c57 5039 down_read(&nfsi->rwsem);
01c3b861 5040 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5041 /* Yes: cache locks! */
01c3b861 5042 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5043 request->fl_flags = fl_flags & ~FL_SLEEP;
5044 status = do_vfs_lock(request->fl_file, request);
5045 goto out_unlock;
01c3b861 5046 }
9a99af49
TM		 5047 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5048 up_read(&nfsi->rwsem);
afe6c27c 5049 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5050 if (status != 0)
9a99af49
TM		 5051 goto out;
5052 down_read(&nfsi->rwsem);
5053 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5054 status = -NFS4ERR_DELAY;
01c3b861 5055 goto out_unlock;
9a99af49 5056 }
6bfc93ef 5057 /* Note: we always want to sleep here! */
01c3b861 5058 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5059 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5060 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5061 "manager!\n", __func__);
01c3b861 5062out_unlock:
19e03c57 5063 up_read(&nfsi->rwsem);
01c3b861
TM		 5064out:
5065 request->fl_flags = fl_flags;
1da177e4
LT		 5066 return status;
5067}
5068
5069static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5070{
a1d0b5ee
TM		 5071 struct nfs4_exception exception = {
5072 .state = state,
05ffe24f 5073 .inode = state->inode,
a1d0b5ee 5074 };
1da177e4
LT		 5075 int err;
5076
5077 do {
965b5d67
TM		 5078 err = _nfs4_proc_setlk(state, cmd, request);
5079 if (err == -NFS4ERR_DENIED)
5080 err = -EAGAIN;
1da177e4 5081 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5082 err, &exception);
1da177e4
LT		 5083 } while (exception.retry);
5084 return err;
5085}
5086
5087static int
5088nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5089{
5090 struct nfs_open_context *ctx;
5091 struct nfs4_state *state;
5092 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5093 int status;
5094
5095 /* verify open state */
cd3758e3 5096 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5097 state = ctx->state;
5098
5099 if (request->fl_start < 0 || request->fl_end < 0)
5100 return -EINVAL;
5101
d953126a
TM		 5102 if (IS_GETLK(cmd)) {
5103 if (state != NULL)
5104 return nfs4_proc_getlk(state, F_GETLK, request);
5105 return 0;
5106 }
1da177e4
LT		 5107
5108 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5109 return -EINVAL;
5110
d953126a
TM		 5111 if (request->fl_type == F_UNLCK) {
5112 if (state != NULL)
5113 return nfs4_proc_unlck(state, cmd, request);
5114 return 0;
5115 }
1da177e4 5116
d953126a
TM		 5117 if (state == NULL)
5118 return -ENOLCK;
55725513
TM		 5119 /*
5120 * Don't rely on the VFS having checked the file open mode,
5121 * since it won't do this for flock() locks.
5122 */
f44106e2 5123 switch (request->fl_type) {
55725513
TM		 5124 case F_RDLCK:
5125 if (!(filp->f_mode & FMODE_READ))
5126 return -EBADF;
5127 break;
5128 case F_WRLCK:
5129 if (!(filp->f_mode & FMODE_WRITE))
5130 return -EBADF;
5131 }
5132
1da177e4
LT		 5133 do {
5134 status = nfs4_proc_setlk(state, cmd, request);
5135 if ((status != -EAGAIN) || IS_SETLK(cmd))
5136 break;
5137 timeout = nfs4_set_lock_task_retry(timeout);
5138 status = -ERESTARTSYS;
5139 if (signalled())
5140 break;
5141 } while(status < 0);
1da177e4
LT		 5142 return status;
5143}
5144
db4f2e63 5145int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5146{
5147 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5148 int err;
5149
5150 err = nfs4_set_lock_state(state, fl);
5151 if (err != 0)
db4f2e63 5152 return err;
4a706fa0 5153 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5154 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5155}
6b3b5496 5156
cf470c3e
TM		 5157struct nfs_release_lockowner_data {
5158 struct nfs4_lock_state *lsp;
5ae67c4f 5159 struct nfs_server *server;
cf470c3e
TM		 5160 struct nfs_release_lockowner_args args;
5161};
5162
d3c7b7cc
TM		 5163static void nfs4_release_lockowner_release(void *calldata)
5164{
cf470c3e 5165 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5166 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5167 kfree(calldata);
5168}
5169
17280175 5170static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5171 .rpc_release = nfs4_release_lockowner_release,
5172};
5173
cf470c3e 5174int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 5175{
5176 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 5177 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5178 struct rpc_message msg = {
5179 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5180 };
5181
5182 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5183 return -EINVAL;
5184 data = kmalloc(sizeof(*data), GFP_NOFS);
5185 if (!data)
5186 return -ENOMEM;
5187 data->lsp = lsp;
5ae67c4f 5188 data->server = server;
cf470c3e
TM		 5189 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5190 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5191 data->args.lock_owner.s_dev = server->s_dev;
5192 msg.rpc_argp = &data->args;
5193 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5194 return 0;
d3c7b7cc
TM		 5195}
5196
aa1870af
BF		 5197#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5198
64c2ce8b
AK		 5199static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5200 const void *buf, size_t buflen,
5201 int flags, int type)
6b3b5496 5202{
64c2ce8b
AK		 5203 if (strcmp(key, "") != 0)
5204 return -EINVAL;
4b580ee3 5205
64c2ce8b 5206 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5207}
5208
64c2ce8b
AK		 5209static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5210 void *buf, size_t buflen, int type)
6b3b5496 5211{
64c2ce8b
AK		 5212 if (strcmp(key, "") != 0)
5213 return -EINVAL;
aa1870af 5214
64c2ce8b 5215 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5216}
5217
64c2ce8b
AK		 5218static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5219 size_t list_len, const char *name,
5220 size_t name_len, int type)
6b3b5496 5221{
64c2ce8b 5222 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5223
096455a2
BF		 5224 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5225 return 0;
64c2ce8b
AK		 5226
5227 if (list && len <= list_len)
5228 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5229 return len;
6b3b5496
BF		 5230}
5231
533eb461
AA		 5232/*
5233 * nfs_fhget will use either the mounted_on_fileid or the fileid
5234 */
69aaaae1
TM		 5235static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5236{
533eb461
AA		 5237 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5238 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5239 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5240 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5241 return;
5242
5243 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5244 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5245 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5246 fattr->nlink = 2;
5247}
5248
f05d147f
BS		 5249static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5250 const struct qstr *name,
5251 struct nfs4_fs_locations *fs_locations,
5252 struct page *page)
683b57b4
TM		 5253{
5254 struct nfs_server *server = NFS_SERVER(dir);
5255 u32 bitmask[2] = {
361e624f 5256 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5257 };
5258 struct nfs4_fs_locations_arg args = {
5259 .dir_fh = NFS_FH(dir),
c228fd3a 5260 .name = name,
683b57b4
TM		 5261 .page = page,
5262 .bitmask = bitmask,
5263 };
22958463
BH		 5264 struct nfs4_fs_locations_res res = {
5265 .fs_locations = fs_locations,
5266 };
683b57b4
TM		 5267 struct rpc_message msg = {
5268 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5269 .rpc_argp = &args,
22958463 5270 .rpc_resp = &res,
683b57b4
TM		 5271 };
5272 int status;
5273
3110ff80 5274 dprintk("%s: start\n", __func__);
533eb461
AA		 5275
5276 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5277 * is not supported */
5278 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5279 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5280 else
5281 bitmask[0] |= FATTR4_WORD0_FILEID;
5282
c228fd3a 5283 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5284 fs_locations->server = server;
830b8e33 5285 fs_locations->nlocations = 0;
f05d147f 5286 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5287 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5288 return status;
5289}
5290
f05d147f
BS		 5291int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5292 const struct qstr *name,
5293 struct nfs4_fs_locations *fs_locations,
5294 struct page *page)
db0a9593
BS		 5295{
5296 struct nfs4_exception exception = { };
5297 int err;
5298 do {
5299 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5300 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5301 &exception);
5302 } while (exception.retry);
5303 return err;
5304}
5305
5a5ea0d4
BS		 5306static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5307{
5308 int status;
5309 struct nfs4_secinfo_arg args = {
5310 .dir_fh = NFS_FH(dir),
5311 .name = name,
5312 };
5313 struct nfs4_secinfo_res res = {
5314 .flavors = flavors,
5315 };
5316 struct rpc_message msg = {
5317 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5318 .rpc_argp = &args,
5319 .rpc_resp = &res,
5320 };
5321
5322 dprintk("NFS call secinfo %s\n", name->name);
5323 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5324 dprintk("NFS reply secinfo: %d\n", status);
5325 return status;
5326}
5327
72de53ec
BS		 5328int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5329 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5330{
5331 struct nfs4_exception exception = { };
5332 int err;
5333 do {
5334 err = nfs4_handle_exception(NFS_SERVER(dir),
5335 _nfs4_proc_secinfo(dir, name, flavors),
5336 &exception);
5337 } while (exception.retry);
5338 return err;
5339}
5340
557134a3 5341#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5342/*
5343 * Check the exchange flags returned by the server for invalid flags, having
5344 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5345 * DS flags set.
5346 */
5347static int nfs4_check_cl_exchange_flags(u32 flags)
5348{
5349 if (flags & ~EXCHGID4_FLAG_MASK_R)
5350 goto out_inval;
5351 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5352 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5353 goto out_inval;
5354 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5355 goto out_inval;
5356 return NFS_OK;
5357out_inval:
5358 return -NFS4ERR_INVAL;
5359}
5360
78fe0f41 5361static bool
79d4e1f0
CL		 5362nfs41_same_server_scope(struct nfs41_server_scope *a,
5363 struct nfs41_server_scope *b)
78fe0f41
WAA		 5364{
5365 if (a->server_scope_sz == b->server_scope_sz &&
5366 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5367 return true;
5368
5369 return false;
5370}
5371
7c44f1ae
WAA		 5372/*
5373 * nfs4_proc_bind_conn_to_session()
5374 *
5375 * The 4.1 client currently uses the same TCP connection for the
5376 * fore and backchannel.
5377 */
2cf047c9 5378int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5379{
5380 int status;
5381 struct nfs41_bind_conn_to_session_res res;
5382 struct rpc_message msg = {
5383 .rpc_proc =
5384 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5385 .rpc_argp = clp,
5386 .rpc_resp = &res,
2cf047c9 5387 .rpc_cred = cred,
7c44f1ae
WAA		 5388 };
5389
5390 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5391
5392 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5393 if (unlikely(res.session == NULL)) {
5394 status = -ENOMEM;
5395 goto out;
5396 }
5397
5398 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5399 if (status == 0) {
5400 if (memcmp(res.session->sess_id.data,
5401 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5402 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5403 status = -EIO;
5404 goto out_session;
5405 }
5406 if (res.dir != NFS4_CDFS4_BOTH) {
5407 dprintk("NFS: %s: Unexpected direction from server\n",
5408 __func__);
5409 status = -EIO;
5410 goto out_session;
5411 }
5412 if (res.use_conn_in_rdma_mode) {
5413 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5414 __func__);
5415 status = -EIO;
5416 goto out_session;
5417 }
5418 }
5419out_session:
5420 kfree(res.session);
5421out:
5422 dprintk("<-- %s status= %d\n", __func__, status);
5423 return status;
5424}
5425
99fe60d0
BH		 5426/*
5427 * nfs4_proc_exchange_id()
5428 *
6bbb4ae8
CL		 5429 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5430 *
99fe60d0
BH		 5431 * Since the clientid has expired, all compounds using sessions
5432 * associated with the stale clientid will be returning
5433 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5434 * be in some phase of session reset.
5435 */
4d643d1d 5436int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5437{
5438 nfs4_verifier verifier;
5439 struct nfs41_exchange_id_args args = {
cd93710e 5440 .verifier = &verifier,
99fe60d0 5441 .client = clp,
357f54d6 5442 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5443 };
5444 struct nfs41_exchange_id_res res = {
32b01310 5445 0
99fe60d0
BH		 5446 };
5447 int status;
5448 struct rpc_message msg = {
5449 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5450 .rpc_argp = &args,
5451 .rpc_resp = &res,
5452 .rpc_cred = cred,
5453 };
99fe60d0 5454
f092075d 5455 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5456 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5457 sizeof(args.id));
6bbb4ae8
CL		 5458 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5459 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5460 args.id_len, args.id);
99fe60d0 5461
acdeb69d 5462 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5463 GFP_NOFS);
acdeb69d 5464 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5465 status = -ENOMEM;
5466 goto out;
5467 }
78fe0f41 5468
79d4e1f0 5469 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5470 GFP_NOFS);
177313f1 5471 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5472 status = -ENOMEM;
acdeb69d 5473 goto out_server_owner;
abe9a6d5 5474 }
78fe0f41 5475
bbafffd2 5476 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5477 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5478 status = -ENOMEM;
5479 goto out_server_scope;
5480 }
5481
1bd714f2 5482 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5483 if (status == 0)
32b01310 5484 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5485
acdeb69d 5486 if (status == 0) {
32b01310
TM		 5487 clp->cl_clientid = res.clientid;
5488 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5489 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5490 clp->cl_seqid = res.seqid;
5491
acdeb69d
CL		 5492 kfree(clp->cl_serverowner);
5493 clp->cl_serverowner = res.server_owner;
5494 res.server_owner = NULL;
78fe0f41 5495
7d2ed9ac 5496 /* use the most recent implementation id */
59155546
CL		 5497 kfree(clp->cl_implid);
5498 clp->cl_implid = res.impl_id;
7d2ed9ac 5499
177313f1 5500 if (clp->cl_serverscope != NULL &&
79d4e1f0 5501 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5502 res.server_scope)) {
5503 dprintk("%s: server_scope mismatch detected\n",
5504 __func__);
5505 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5506 kfree(clp->cl_serverscope);
5507 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5508 }
5509
177313f1 5510 if (clp->cl_serverscope == NULL) {
79d4e1f0 5511 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5512 goto out;
5513 }
32b01310
TM		 5514 } else
5515 kfree(res.impl_id);
7d2ed9ac 5516
acdeb69d
CL		 5517out_server_owner:
5518 kfree(res.server_owner);
7d2ed9ac 5519out_server_scope:
abe9a6d5
WAA		 5520 kfree(res.server_scope);
5521out:
177313f1 5522 if (clp->cl_implid != NULL)
6bbb4ae8 5523 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5524 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5525 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5526 clp->cl_implid->date.seconds,
5527 clp->cl_implid->date.nseconds);
6bbb4ae8 5528 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5529 return status;
5530}
5531
66245539
TM		 5532static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5533 struct rpc_cred *cred)
5534{
5535 struct rpc_message msg = {
5536 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5537 .rpc_argp = clp,
5538 .rpc_cred = cred,
5539 };
5540 int status;
5541
5542 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5543 if (status)
02c67525 5544 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5545 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5546 return status;
5547}
5548
5549static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5550 struct rpc_cred *cred)
5551{
5552 unsigned int loop;
5553 int ret;
5554
5555 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5556 ret = _nfs4_proc_destroy_clientid(clp, cred);
5557 switch (ret) {
5558 case -NFS4ERR_DELAY:
5559 case -NFS4ERR_CLIENTID_BUSY:
5560 ssleep(1);
5561 break;
5562 default:
5563 return ret;
5564 }
5565 }
5566 return 0;
5567}
5568
5569int nfs4_destroy_clientid(struct nfs_client *clp)
5570{
5571 struct rpc_cred *cred;
5572 int ret = 0;
5573
5574 if (clp->cl_mvops->minor_version < 1)
5575 goto out;
5576 if (clp->cl_exchange_flags == 0)
5577 goto out;
05f4c350
CL		 5578 if (clp->cl_preserve_clid)
5579 goto out;
66245539
TM		 5580 cred = nfs4_get_exchange_id_cred(clp);
5581 ret = nfs4_proc_destroy_clientid(clp, cred);
5582 if (cred)
5583 put_rpccred(cred);
5584 switch (ret) {
5585 case 0:
5586 case -NFS4ERR_STALE_CLIENTID:
5587 clp->cl_exchange_flags = 0;
5588 }
5589out:
5590 return ret;
5591}
5592
2050f0cc
AA		 5593struct nfs4_get_lease_time_data {
5594 struct nfs4_get_lease_time_args *args;
5595 struct nfs4_get_lease_time_res *res;
5596 struct nfs_client *clp;
5597};
5598
5599static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5600 void *calldata)
5601{
2050f0cc
AA		 5602 struct nfs4_get_lease_time_data *data =
5603 (struct nfs4_get_lease_time_data *)calldata;
5604
5605 dprintk("--> %s\n", __func__);
5606 /* just setup sequence, do not trigger session recovery
5607 since we're invoked within one */
d9afbd1b
TM		 5608 nfs41_setup_sequence(data->clp->cl_session,
5609 &data->args->la_seq_args,
5610 &data->res->lr_seq_res,
5611 task);
2050f0cc
AA		 5612 dprintk("<-- %s\n", __func__);
5613}
5614
5615/*
5616 * Called from nfs4_state_manager thread for session setup, so don't recover
5617 * from sequence operation or clientid errors.
5618 */
5619static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5620{
5621 struct nfs4_get_lease_time_data *data =
5622 (struct nfs4_get_lease_time_data *)calldata;
5623
5624 dprintk("--> %s\n", __func__);
14516c3a
TM		 5625 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5626 return;
2050f0cc
AA		 5627 switch (task->tk_status) {
5628 case -NFS4ERR_DELAY:
5629 case -NFS4ERR_GRACE:
5630 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5631 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5632 task->tk_status = 0;
a8a4ae3a
AA		 5633 /* fall through */
5634 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5635 rpc_restart_call_prepare(task);
2050f0cc
AA		 5636 return;
5637 }
2050f0cc
AA		 5638 dprintk("<-- %s\n", __func__);
5639}
5640
17280175 5641static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5642 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5643 .rpc_call_done = nfs4_get_lease_time_done,
5644};
5645
5646int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5647{
5648 struct rpc_task *task;
5649 struct nfs4_get_lease_time_args args;
5650 struct nfs4_get_lease_time_res res = {
5651 .lr_fsinfo = fsinfo,
5652 };
5653 struct nfs4_get_lease_time_data data = {
5654 .args = &args,
5655 .res = &res,
5656 .clp = clp,
5657 };
5658 struct rpc_message msg = {
5659 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5660 .rpc_argp = &args,
5661 .rpc_resp = &res,
5662 };
5663 struct rpc_task_setup task_setup = {
5664 .rpc_client = clp->cl_rpcclient,
5665 .rpc_message = &msg,
5666 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5667 .callback_data = &data,
5668 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5669 };
5670 int status;
5671
9d12b216 5672 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5673 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5674 dprintk("--> %s\n", __func__);
5675 task = rpc_run_task(&task_setup);
5676
5677 if (IS_ERR(task))
5678 status = PTR_ERR(task);
5679 else {
5680 status = task->tk_status;
5681 rpc_put_task(task);
5682 }
5683 dprintk("<-- %s return %d\n", __func__, status);
5684
5685 return status;
5686}
5687
fc931582
AA		 5688/*
5689 * Initialize the values to be used by the client in CREATE_SESSION
5690 * If nfs4_init_session set the fore channel request and response sizes,
5691 * use them.
5692 *
5693 * Set the back channel max_resp_sz_cached to zero to force the client to
5694 * always set csa_cachethis to FALSE because the current implementation
5695 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5696 */
5697static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5698{
5699 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5700 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5701 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5702
5703 if (mxrqst_sz == 0)
5704 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5705 if (mxresp_sz == 0)
5706 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5707 /* Fore channel attributes */
fc931582
AA		 5708 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5709 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5710 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5711 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5712
5713 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5714 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5715 __func__,
5716 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5717 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5718
5719 /* Back channel attributes */
fc931582
AA		 5720 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5721 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5722 args->bc_attrs.max_resp_sz_cached = 0;
5723 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5724 args->bc_attrs.max_reqs = 1;
5725
5726 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5727 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5728 __func__,
5729 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5730 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5731 args->bc_attrs.max_reqs);
5732}
5733
43c2e885 5734static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5735{
43c2e885
BF		 5736 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5737 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5738
43c2e885
BF		 5739 if (rcvd->max_resp_sz > sent->max_resp_sz)
5740 return -EINVAL;
5741 /*
5742 * Our requested max_ops is the minimum we need; we're not
5743 * prepared to break up compounds into smaller pieces than that.
5744 * So, no point even trying to continue if the server won't
5745 * cooperate:
5746 */
5747 if (rcvd->max_ops < sent->max_ops)
5748 return -EINVAL;
5749 if (rcvd->max_reqs == 0)
5750 return -EINVAL;
b4b9a0c1
VG		 5751 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5752 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5753 return 0;
8d35301d
AA		 5754}
5755
43c2e885
BF		 5756static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5757{
5758 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5759 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5760
43c2e885
BF		 5761 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5762 return -EINVAL;
5763 if (rcvd->max_resp_sz < sent->max_resp_sz)
5764 return -EINVAL;
5765 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5766 return -EINVAL;
5767 /* These would render the backchannel useless: */
b4b9a0c1 5768 if (rcvd->max_ops != sent->max_ops)
43c2e885 5769 return -EINVAL;
b4b9a0c1 5770 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5771 return -EINVAL;
5772 return 0;
5773}
8d35301d 5774
8d35301d
AA		 5775static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5776 struct nfs4_session *session)
5777{
43c2e885 5778 int ret;
8d35301d 5779
43c2e885
BF		 5780 ret = nfs4_verify_fore_channel_attrs(args, session);
5781 if (ret)
5782 return ret;
5783 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5784}
5785
848f5bda
TM		 5786static int _nfs4_proc_create_session(struct nfs_client *clp,
5787 struct rpc_cred *cred)
fc931582
AA		 5788{
5789 struct nfs4_session *session = clp->cl_session;
5790 struct nfs41_create_session_args args = {
5791 .client = clp,
5792 .cb_program = NFS4_CALLBACK,
5793 };
5794 struct nfs41_create_session_res res = {
5795 .client = clp,
5796 };
5797 struct rpc_message msg = {
5798 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5799 .rpc_argp = &args,
5800 .rpc_resp = &res,
848f5bda 5801 .rpc_cred = cred,
fc931582
AA		 5802 };
5803 int status;
5804
5805 nfs4_init_channel_attrs(&args);
0f91421e 5806 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5807
1bd714f2 5808 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5809
43095d39 5810 if (!status) {
8d35301d
AA		 5811 /* Verify the session's negotiated channel_attrs values */
5812 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5813 /* Increment the clientid slot sequence id */
5814 clp->cl_seqid++;
5815 }
5816
5817 return status;
5818}
5819
5820/*
5821 * Issues a CREATE_SESSION operation to the server.
5822 * It is the responsibility of the caller to verify the session is
5823 * expired before calling this routine.
5824 */
848f5bda 5825int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5826{
5827 int status;
5828 unsigned *ptr;
fc931582
AA		 5829 struct nfs4_session *session = clp->cl_session;
5830
5831 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5832
848f5bda 5833 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5834 if (status)
5835 goto out;
5836
aacd5537
AA		 5837 /* Init or reset the session slot tables */
5838 status = nfs4_setup_session_slot_tables(session);
5839 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5840 if (status)
5841 goto out;
5842
5843 ptr = (unsigned *)&session->sess_id.data[0];
5844 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5845 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5846out:
5847 dprintk("<-- %s\n", __func__);
5848 return status;
5849}
5850
0f3e66c6
AA		 5851/*
5852 * Issue the over-the-wire RPC DESTROY_SESSION.
5853 * The caller must serialize access to this routine.
5854 */
848f5bda
TM		 5855int nfs4_proc_destroy_session(struct nfs4_session *session,
5856 struct rpc_cred *cred)
0f3e66c6 5857{
848f5bda
TM		 5858 struct rpc_message msg = {
5859 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5860 .rpc_argp = session,
5861 .rpc_cred = cred,
5862 };
0f3e66c6 5863 int status = 0;
0f3e66c6
AA		 5864
5865 dprintk("--> nfs4_proc_destroy_session\n");
5866
5867 /* session is still being setup */
5868 if (session->clp->cl_cons_state != NFS_CS_READY)
5869 return status;
5870
1bd714f2 5871 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5872
5873 if (status)
08106ac7 5874 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5875 "Session has been destroyed regardless...\n", status);
5876
5877 dprintk("<-- nfs4_proc_destroy_session\n");
5878 return status;
5879}
5880
fc01cea9
AA		 5881/*
5882 * Renew the cl_session lease.
5883 */
d5f8d3fe
TM		 5884struct nfs4_sequence_data {
5885 struct nfs_client *clp;
5886 struct nfs4_sequence_args args;
5887 struct nfs4_sequence_res res;
5888};
5889
dc96aef9
AB		 5890static void nfs41_sequence_release(void *data)
5891{
d5f8d3fe
TM		 5892 struct nfs4_sequence_data *calldata = data;
5893 struct nfs_client *clp = calldata->clp;
dc96aef9 5894
7135840f
AB		 5895 if (atomic_read(&clp->cl_count) > 1)
5896 nfs4_schedule_state_renewal(clp);
5897 nfs_put_client(clp);
d5f8d3fe 5898 kfree(calldata);
dc96aef9
AB		 5899}
5900
aa5190d0
TM		 5901static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5902{
5903 switch(task->tk_status) {
5904 case -NFS4ERR_DELAY:
aa5190d0
TM		 5905 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5906 return -EAGAIN;
5907 default:
0400a6b0 5908 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5909 }
5910 return 0;
5911}
5912
dc96aef9 5913static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5914{
d5f8d3fe
TM		 5915 struct nfs4_sequence_data *calldata = data;
5916 struct nfs_client *clp = calldata->clp;
fc01cea9 5917
14516c3a
TM		 5918 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5919 return;
fc01cea9
AA		 5920
5921 if (task->tk_status < 0) {
5922 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5923 if (atomic_read(&clp->cl_count) == 1)
5924 goto out;
fc01cea9 5925
aa5190d0
TM		 5926 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5927 rpc_restart_call_prepare(task);
fc01cea9
AA		 5928 return;
5929 }
5930 }
fc01cea9 5931 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5932out:
fc01cea9
AA		 5933 dprintk("<-- %s\n", __func__);
5934}
5935
5936static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5937{
d5f8d3fe
TM		 5938 struct nfs4_sequence_data *calldata = data;
5939 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5940 struct nfs4_sequence_args *args;
5941 struct nfs4_sequence_res *res;
5942
fc01cea9
AA		 5943 args = task->tk_msg.rpc_argp;
5944 res = task->tk_msg.rpc_resp;
5945
d9afbd1b 5946 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 5947}
5948
5949static const struct rpc_call_ops nfs41_sequence_ops = {
5950 .rpc_call_done = nfs41_sequence_call_done,
5951 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5952 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5953};
5954
8fe72bac
TM		 5955static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
5956 struct rpc_cred *cred,
5957 bool is_privileged)
fc01cea9 5958{
d5f8d3fe 5959 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5960 struct rpc_message msg = {
5961 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5962 .rpc_cred = cred,
5963 };
71ac6da9
TM		 5964 struct rpc_task_setup task_setup_data = {
5965 .rpc_client = clp->cl_rpcclient,
5966 .rpc_message = &msg,
8fe72bac 5967 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 5968 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 5969 };
fc01cea9 5970
7135840f 5971 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5972 return ERR_PTR(-EIO);
dfb4f309 5973 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5974 if (calldata == NULL) {
7135840f 5975 nfs_put_client(clp);
71ac6da9 5976 return ERR_PTR(-ENOMEM);
fc01cea9 5977 }
9d12b216 5978 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 5979 if (is_privileged)
5980 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 5981 msg.rpc_argp = &calldata->args;
5982 msg.rpc_resp = &calldata->res;
5983 calldata->clp = clp;
71ac6da9 5984 task_setup_data.callback_data = calldata;
fc01cea9 5985
71ac6da9
TM		 5986 return rpc_run_task(&task_setup_data);
5987}
5988
2f60ea6b 5989static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 5990{
5991 struct rpc_task *task;
5992 int ret = 0;
5993
2f60ea6b
TM		 5994 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5995 return 0;
8fe72bac 5996 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 5997 if (IS_ERR(task))
5998 ret = PTR_ERR(task);
5999 else
bf294b41 6000 rpc_put_task_async(task);
71ac6da9
TM		 6001 dprintk("<-- %s status=%d\n", __func__, ret);
6002 return ret;
6003}
6004
6005static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6006{
6007 struct rpc_task *task;
6008 int ret;
6009
8fe72bac 6010 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6011 if (IS_ERR(task)) {
6012 ret = PTR_ERR(task);
6013 goto out;
6014 }
6015 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6016 if (!ret) {
6017 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6018
6019 if (task->tk_status == 0)
6020 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6021 ret = task->tk_status;
b4410c2f 6022 }
71ac6da9
TM		 6023 rpc_put_task(task);
6024out:
6025 dprintk("<-- %s status=%d\n", __func__, ret);
6026 return ret;
fc01cea9
AA		 6027}
6028
fce5c838
RL		 6029struct nfs4_reclaim_complete_data {
6030 struct nfs_client *clp;
6031 struct nfs41_reclaim_complete_args arg;
6032 struct nfs41_reclaim_complete_res res;
6033};
6034
6035static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6036{
6037 struct nfs4_reclaim_complete_data *calldata = data;
6038
d9afbd1b
TM		 6039 nfs41_setup_sequence(calldata->clp->cl_session,
6040 &calldata->arg.seq_args,
6041 &calldata->res.seq_res,
6042 task);
fce5c838
RL		 6043}
6044
aa5190d0
TM		 6045static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6046{
6047 switch(task->tk_status) {
6048 case 0:
6049 case -NFS4ERR_COMPLETE_ALREADY:
6050 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6051 break;
6052 case -NFS4ERR_DELAY:
aa5190d0 6053 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6054 /* fall through */
6055 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6056 return -EAGAIN;
6057 default:
0400a6b0 6058 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6059 }
6060 return 0;
6061}
6062
fce5c838
RL		 6063static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6064{
6065 struct nfs4_reclaim_complete_data *calldata = data;
6066 struct nfs_client *clp = calldata->clp;
6067 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6068
6069 dprintk("--> %s\n", __func__);
14516c3a
TM		 6070 if (!nfs41_sequence_done(task, res))
6071 return;
fce5c838 6072
aa5190d0
TM		 6073 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6074 rpc_restart_call_prepare(task);
6075 return;
6076 }
fce5c838
RL		 6077 dprintk("<-- %s\n", __func__);
6078}
6079
6080static void nfs4_free_reclaim_complete_data(void *data)
6081{
6082 struct nfs4_reclaim_complete_data *calldata = data;
6083
6084 kfree(calldata);
6085}
6086
6087static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6088 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6089 .rpc_call_done = nfs4_reclaim_complete_done,
6090 .rpc_release = nfs4_free_reclaim_complete_data,
6091};
6092
6093/*
6094 * Issue a global reclaim complete.
6095 */
6096static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6097{
6098 struct nfs4_reclaim_complete_data *calldata;
6099 struct rpc_task *task;
6100 struct rpc_message msg = {
6101 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6102 };
6103 struct rpc_task_setup task_setup_data = {
6104 .rpc_client = clp->cl_rpcclient,
6105 .rpc_message = &msg,
6106 .callback_ops = &nfs4_reclaim_complete_call_ops,
6107 .flags = RPC_TASK_ASYNC,
6108 };
6109 int status = -ENOMEM;
6110
6111 dprintk("--> %s\n", __func__);
8535b2be 6112 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6113 if (calldata == NULL)
6114 goto out;
6115 calldata->clp = clp;
6116 calldata->arg.one_fs = 0;
fce5c838 6117
9d12b216 6118 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6119 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6120 msg.rpc_argp = &calldata->arg;
6121 msg.rpc_resp = &calldata->res;
6122 task_setup_data.callback_data = calldata;
6123 task = rpc_run_task(&task_setup_data);
acf82b85 6124 if (IS_ERR(task)) {
fce5c838 6125 status = PTR_ERR(task);
acf82b85
DC		 6126 goto out;
6127 }
c34c32ea
AA		 6128 status = nfs4_wait_for_completion_rpc_task(task);
6129 if (status == 0)
6130 status = task->tk_status;
fce5c838 6131 rpc_put_task(task);
acf82b85 6132 return 0;
fce5c838
RL		 6133out:
6134 dprintk("<-- %s status=%d\n", __func__, status);
6135 return status;
6136}
b1f69b75
AA		 6137
6138static void
6139nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6140{
6141 struct nfs4_layoutget *lgp = calldata;
c31663d4 6142 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6143 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6144
6145 dprintk("--> %s\n", __func__);
c31663d4
FI		 6146 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6147 * right now covering the LAYOUTGET we are about to send.
6148 * However, that is not so catastrophic, and there seems
6149 * to be no way to prevent it completely.
6150 */
6ba7db34 6151 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6152 &lgp->res.seq_res, task))
b1f69b75 6153 return;
cf7d63f1
FI		 6154 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6155 NFS_I(lgp->args.inode)->layout,
6156 lgp->args.ctx->state)) {
6157 rpc_exit(task, NFS4_OK);
cf7d63f1 6158 }
b1f69b75
AA		 6159}
6160
6161static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6162{
6163 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6164 struct inode *inode = lgp->args.inode;
6165 struct nfs_server *server = NFS_SERVER(inode);
6166 struct pnfs_layout_hdr *lo;
6167 struct nfs4_state *state = NULL;
30005121 6168 unsigned long timeo, giveup;
b1f69b75
AA		 6169
6170 dprintk("--> %s\n", __func__);
6171
6ba7db34 6172 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6173 goto out;
b1f69b75
AA		 6174
6175 switch (task->tk_status) {
6176 case 0:
ee314c2a 6177 goto out;
b1f69b75
AA		 6178 case -NFS4ERR_LAYOUTTRYLATER:
6179 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6180 timeo = rpc_get_timeout(task->tk_client);
6181 giveup = lgp->args.timestamp + timeo;
6182 if (time_after(giveup, jiffies))
6183 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6184 break;
6185 case -NFS4ERR_EXPIRED:
6186 case -NFS4ERR_BAD_STATEID:
6187 spin_lock(&inode->i_lock);
6188 lo = NFS_I(inode)->layout;
6189 if (!lo || list_empty(&lo->plh_segs)) {
6190 spin_unlock(&inode->i_lock);
6191 /* If the open stateid was bad, then recover it. */
6192 state = lgp->args.ctx->state;
6193 } else {
6194 LIST_HEAD(head);
6195
6196 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6197 spin_unlock(&inode->i_lock);
6198 /* Mark the bad layout state as invalid, then
6199 * retry using the open stateid. */
6200 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6201 }
6202 }
ee314c2a
TM		 6203 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6204 rpc_restart_call_prepare(task);
6205out:
b1f69b75
AA		 6206 dprintk("<-- %s\n", __func__);
6207}
6208
8554116e
IK		 6209static size_t max_response_pages(struct nfs_server *server)
6210{
6211 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6212 return nfs_page_array_len(0, max_resp_sz);
6213}
6214
6215static void nfs4_free_pages(struct page **pages, size_t size)
6216{
6217 int i;
6218
6219 if (!pages)
6220 return;
6221
6222 for (i = 0; i < size; i++) {
6223 if (!pages[i])
6224 break;
6225 __free_page(pages[i]);
6226 }
6227 kfree(pages);
6228}
6229
6230static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6231{
6232 struct page **pages;
6233 int i;
6234
6235 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6236 if (!pages) {
6237 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6238 return NULL;
6239 }
6240
6241 for (i = 0; i < size; i++) {
6242 pages[i] = alloc_page(gfp_flags);
6243 if (!pages[i]) {
6244 dprintk("%s: failed to allocate page\n", __func__);
6245 nfs4_free_pages(pages, size);
6246 return NULL;
6247 }
6248 }
6249
6250 return pages;
6251}
6252
b1f69b75
AA		 6253static void nfs4_layoutget_release(void *calldata)
6254{
6255 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6256 struct inode *inode = lgp->args.inode;
6257 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6258 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6259
6260 dprintk("--> %s\n", __func__);
8554116e 6261 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6262 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6263 put_nfs_open_context(lgp->args.ctx);
6264 kfree(calldata);
6265 dprintk("<-- %s\n", __func__);
6266}
6267
6268static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6269 .rpc_call_prepare = nfs4_layoutget_prepare,
6270 .rpc_call_done = nfs4_layoutget_done,
6271 .rpc_release = nfs4_layoutget_release,
6272};
6273
a0b0a6e3
TM		 6274struct pnfs_layout_segment *
6275nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6276{
a47970ff
WAA		 6277 struct inode *inode = lgp->args.inode;
6278 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6279 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6280 struct rpc_task *task;
6281 struct rpc_message msg = {
6282 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6283 .rpc_argp = &lgp->args,
6284 .rpc_resp = &lgp->res,
6285 };
6286 struct rpc_task_setup task_setup_data = {
6287 .rpc_client = server->client,
6288 .rpc_message = &msg,
6289 .callback_ops = &nfs4_layoutget_call_ops,
6290 .callback_data = lgp,
6291 .flags = RPC_TASK_ASYNC,
6292 };
a0b0a6e3 6293 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6294 int status = 0;
6295
6296 dprintk("--> %s\n", __func__);
6297
8554116e
IK		 6298 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6299 if (!lgp->args.layout.pages) {
6300 nfs4_layoutget_release(lgp);
a0b0a6e3 6301 return ERR_PTR(-ENOMEM);
8554116e
IK		 6302 }
6303 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6304 lgp->args.timestamp = jiffies;
8554116e 6305
35124a09 6306 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6307 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6308 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6309
6310 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6311 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6312
b1f69b75
AA		 6313 task = rpc_run_task(&task_setup_data);
6314 if (IS_ERR(task))
a0b0a6e3 6315 return ERR_CAST(task);
b1f69b75 6316 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6317 if (status == 0)
6318 status = task->tk_status;
085b7a45
WAA		 6319 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6320 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6321 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6322 rpc_put_task(task);
6323 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6324 if (status)
6325 return ERR_PTR(status);
6326 return lseg;
b1f69b75
AA		 6327}
6328
cbe82603
BH		 6329static void
6330nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6331{
6332 struct nfs4_layoutreturn *lrp = calldata;
6333
6334 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6335 nfs41_setup_sequence(lrp->clp->cl_session,
6336 &lrp->args.seq_args,
6337 &lrp->res.seq_res,
6338 task);
cbe82603
BH		 6339}
6340
6341static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6342{
6343 struct nfs4_layoutreturn *lrp = calldata;
6344 struct nfs_server *server;
6345
6346 dprintk("--> %s\n", __func__);
6347
6ba7db34 6348 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6349 return;
6350
6351 server = NFS_SERVER(lrp->args.inode);
6352 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6353 rpc_restart_call_prepare(task);
cbe82603
BH		 6354 return;
6355 }
cbe82603
BH		 6356 dprintk("<-- %s\n", __func__);
6357}
6358
6359static void nfs4_layoutreturn_release(void *calldata)
6360{
6361 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6362 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6363
6364 dprintk("--> %s\n", __func__);
849b286f
TM		 6365 spin_lock(&lo->plh_inode->i_lock);
6366 if (lrp->res.lrs_present)
6367 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6368 lo->plh_block_lgets--;
6369 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6370 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6371 kfree(calldata);
6372 dprintk("<-- %s\n", __func__);
6373}
6374
6375static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6376 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6377 .rpc_call_done = nfs4_layoutreturn_done,
6378 .rpc_release = nfs4_layoutreturn_release,
6379};
6380
6381int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6382{
6383 struct rpc_task *task;
6384 struct rpc_message msg = {
6385 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6386 .rpc_argp = &lrp->args,
6387 .rpc_resp = &lrp->res,
6388 };
6389 struct rpc_task_setup task_setup_data = {
6390 .rpc_client = lrp->clp->cl_rpcclient,
6391 .rpc_message = &msg,
6392 .callback_ops = &nfs4_layoutreturn_call_ops,
6393 .callback_data = lrp,
6394 };
6395 int status;
6396
6397 dprintk("--> %s\n", __func__);
9d12b216 6398 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6399 task = rpc_run_task(&task_setup_data);
6400 if (IS_ERR(task))
6401 return PTR_ERR(task);
6402 status = task->tk_status;
6403 dprintk("<-- %s status=%d\n", __func__, status);
6404 rpc_put_task(task);
6405 return status;
6406}
6407
7f11d8d3
AA		 6408/*
6409 * Retrieve the list of Data Server devices from the MDS.
6410 */
6411static int _nfs4_getdevicelist(struct nfs_server *server,
6412 const struct nfs_fh *fh,
6413 struct pnfs_devicelist *devlist)
6414{
6415 struct nfs4_getdevicelist_args args = {
6416 .fh = fh,
6417 .layoutclass = server->pnfs_curr_ld->id,
6418 };
6419 struct nfs4_getdevicelist_res res = {
6420 .devlist = devlist,
6421 };
6422 struct rpc_message msg = {
6423 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6424 .rpc_argp = &args,
6425 .rpc_resp = &res,
6426 };
6427 int status;
6428
6429 dprintk("--> %s\n", __func__);
6430 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6431 &res.seq_res, 0);
6432 dprintk("<-- %s status=%d\n", __func__, status);
6433 return status;
6434}
6435
6436int nfs4_proc_getdevicelist(struct nfs_server *server,
6437 const struct nfs_fh *fh,
6438 struct pnfs_devicelist *devlist)
6439{
6440 struct nfs4_exception exception = { };
6441 int err;
6442
6443 do {
6444 err = nfs4_handle_exception(server,
6445 _nfs4_getdevicelist(server, fh, devlist),
6446 &exception);
6447 } while (exception.retry);
6448
6449 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6450 err, devlist->num_devs);
6451
6452 return err;
6453}
6454EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6455
b1f69b75
AA		 6456static int
6457_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6458{
6459 struct nfs4_getdeviceinfo_args args = {
6460 .pdev = pdev,
6461 };
6462 struct nfs4_getdeviceinfo_res res = {
6463 .pdev = pdev,
6464 };
6465 struct rpc_message msg = {
6466 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6467 .rpc_argp = &args,
6468 .rpc_resp = &res,
6469 };
6470 int status;
6471
6472 dprintk("--> %s\n", __func__);
7c513058 6473 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6474 dprintk("<-- %s status=%d\n", __func__, status);
6475
6476 return status;
6477}
6478
6479int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6480{
6481 struct nfs4_exception exception = { };
6482 int err;
6483
6484 do {
6485 err = nfs4_handle_exception(server,
6486 _nfs4_proc_getdeviceinfo(server, pdev),
6487 &exception);
6488 } while (exception.retry);
6489 return err;
6490}
6491EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6492
863a3c6c
AA		 6493static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6494{
6495 struct nfs4_layoutcommit_data *data = calldata;
6496 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6497 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6498
d9afbd1b
TM		 6499 nfs41_setup_sequence(session,
6500 &data->args.seq_args,
6501 &data->res.seq_res,
6502 task);
863a3c6c
AA		 6503}
6504
6505static void
6506nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6507{
6508 struct nfs4_layoutcommit_data *data = calldata;
6509 struct nfs_server *server = NFS_SERVER(data->args.inode);
6510
6ba7db34 6511 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6512 return;
6513
6514 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6515 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6516 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6517 case -NFS4ERR_BADLAYOUT: /* no layout */
6518 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6519 task->tk_status = 0;
e59d27e0
TM		 6520 break;
6521 case 0:
863a3c6c
AA		 6522 nfs_post_op_update_inode_force_wcc(data->args.inode,
6523 data->res.fattr);
e59d27e0
TM		 6524 break;
6525 default:
6526 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6527 rpc_restart_call_prepare(task);
6528 return;
6529 }
6530 }
863a3c6c
AA		 6531}
6532
6533static void nfs4_layoutcommit_release(void *calldata)
6534{
6535 struct nfs4_layoutcommit_data *data = calldata;
6536
db29c089 6537 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 6538 put_rpccred(data->cred);
6539 kfree(data);
6540}
6541
6542static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6543 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6544 .rpc_call_done = nfs4_layoutcommit_done,
6545 .rpc_release = nfs4_layoutcommit_release,
6546};
6547
6548int
ef311537 6549nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6550{
6551 struct rpc_message msg = {
6552 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6553 .rpc_argp = &data->args,
6554 .rpc_resp = &data->res,
6555 .rpc_cred = data->cred,
6556 };
6557 struct rpc_task_setup task_setup_data = {
6558 .task = &data->task,
6559 .rpc_client = NFS_CLIENT(data->args.inode),
6560 .rpc_message = &msg,
6561 .callback_ops = &nfs4_layoutcommit_ops,
6562 .callback_data = data,
6563 .flags = RPC_TASK_ASYNC,
6564 };
6565 struct rpc_task *task;
6566 int status = 0;
6567
6568 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6569 "lbw: %llu inode %lu\n",
6570 data->task.tk_pid, sync,
6571 data->args.lastbytewritten,
6572 data->args.inode->i_ino);
6573
9d12b216 6574 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6575 task = rpc_run_task(&task_setup_data);
6576 if (IS_ERR(task))
6577 return PTR_ERR(task);
ef311537 6578 if (sync == false)
863a3c6c
AA		 6579 goto out;
6580 status = nfs4_wait_for_completion_rpc_task(task);
6581 if (status != 0)
6582 goto out;
6583 status = task->tk_status;
6584out:
6585 dprintk("%s: status %d\n", __func__, status);
6586 rpc_put_task(task);
6587 return status;
6588}
fca78d6d
BS		 6589
6590static int
6591_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6592 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6593{
6594 struct nfs41_secinfo_no_name_args args = {
6595 .style = SECINFO_STYLE_CURRENT_FH,
6596 };
6597 struct nfs4_secinfo_res res = {
6598 .flavors = flavors,
6599 };
6600 struct rpc_message msg = {
6601 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6602 .rpc_argp = &args,
6603 .rpc_resp = &res,
6604 };
6605 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6606}
6607
6608static int
6609nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6610 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6611{
6612 struct nfs4_exception exception = { };
6613 int err;
6614 do {
6615 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6616 switch (err) {
6617 case 0:
6618 case -NFS4ERR_WRONGSEC:
6619 case -NFS4ERR_NOTSUPP:
05e9cfb4 6620 goto out;
fca78d6d
BS		 6621 default:
6622 err = nfs4_handle_exception(server, err, &exception);
6623 }
6624 } while (exception.retry);
05e9cfb4 6625out:
fca78d6d
BS		 6626 return err;
6627}
6628
6629static int
6630nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6631 struct nfs_fsinfo *info)
6632{
6633 int err;
6634 struct page *page;
6635 rpc_authflavor_t flavor;
6636 struct nfs4_secinfo_flavors *flavors;
6637
6638 page = alloc_page(GFP_KERNEL);
6639 if (!page) {
6640 err = -ENOMEM;
6641 goto out;
6642 }
6643
6644 flavors = page_address(page);
6645 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6646
6647 /*
6648 * Fall back on "guess and check" method if
6649 * the server doesn't support SECINFO_NO_NAME
6650 */
6651 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6652 err = nfs4_find_root_sec(server, fhandle, info);
6653 goto out_freepage;
6654 }
6655 if (err)
6656 goto out_freepage;
6657
6658 flavor = nfs_find_best_sec(flavors);
6659 if (err == 0)
6660 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6661
6662out_freepage:
6663 put_page(page);
6664 if (err == -EACCES)
6665 return -EPERM;
6666out:
6667 return err;
6668}
1cab0652
BS		 6669
6670static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6671{
6672 int status;
6673 struct nfs41_test_stateid_args args = {
1cab0652 6674 .stateid = stateid,
7d974794
BS		 6675 };
6676 struct nfs41_test_stateid_res res;
6677 struct rpc_message msg = {
6678 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6679 .rpc_argp = &args,
6680 .rpc_resp = &res,
6681 };
1cab0652 6682
38527b15 6683 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6684 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6685 nfs4_set_sequence_privileged(&args.seq_args);
6686 status = nfs4_call_sync_sequence(server->client, server, &msg,
6687 &args.seq_args, &res.seq_res);
38527b15
CL		 6688 if (status != NFS_OK) {
6689 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6690 return status;
38527b15
CL		 6691 }
6692 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6693 return -res.status;
7d974794
BS		 6694}
6695
38527b15
CL		 6696/**
6697 * nfs41_test_stateid - perform a TEST_STATEID operation
6698 *
6699 * @server: server / transport on which to perform the operation
6700 * @stateid: state ID to test
6701 *
6702 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6703 * Otherwise a negative NFS4ERR value is returned if the operation
6704 * failed or the state ID is not currently valid.
6705 */
1cab0652 6706static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6707{
6708 struct nfs4_exception exception = { };
6709 int err;
6710 do {
377e507d
CL		 6711 err = _nfs41_test_stateid(server, stateid);
6712 if (err != -NFS4ERR_DELAY)
6713 break;
6714 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6715 } while (exception.retry);
6716 return err;
6717}
9aeda35f 6718
1cab0652 6719static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6720{
9aeda35f 6721 struct nfs41_free_stateid_args args = {
1cab0652 6722 .stateid = stateid,
9aeda35f
BS		 6723 };
6724 struct nfs41_free_stateid_res res;
6725 struct rpc_message msg = {
6726 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6727 .rpc_argp = &args,
6728 .rpc_resp = &res,
6729 };
38527b15 6730 int status;
9aeda35f 6731
38527b15 6732 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6733 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 6734 nfs4_set_sequence_privileged(&args.seq_args);
38527b15 6735 status = nfs4_call_sync_sequence(server->client, server, &msg,
8fe72bac 6736 &args.seq_args, &res.seq_res);
38527b15
CL		 6737 dprintk("NFS reply free_stateid: %d\n", status);
6738 return status;
9aeda35f
BS		 6739}
6740
38527b15
CL		 6741/**
6742 * nfs41_free_stateid - perform a FREE_STATEID operation
6743 *
6744 * @server: server / transport on which to perform the operation
6745 * @stateid: state ID to release
6746 *
6747 * Returns NFS_OK if the server freed "stateid". Otherwise a
6748 * negative NFS4ERR value is returned.
6749 */
1cab0652 6750static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6751{
6752 struct nfs4_exception exception = { };
6753 int err;
6754 do {
377e507d
CL		 6755 err = _nfs4_free_stateid(server, stateid);
6756 if (err != -NFS4ERR_DELAY)
6757 break;
6758 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6759 } while (exception.retry);
6760 return err;
6761}
36281caa
TM		 6762
6763static bool nfs41_match_stateid(const nfs4_stateid *s1,
6764 const nfs4_stateid *s2)
6765{
2d2f24ad 6766 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6767 return false;
6768
2d2f24ad 6769 if (s1->seqid == s2->seqid)
36281caa 6770 return true;
2d2f24ad 6771 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6772 return true;
6773
6774 return false;
6775}
6776
557134a3
AA		 6777#endif /* CONFIG_NFS_V4_1 */
6778
36281caa
TM		 6779static bool nfs4_match_stateid(const nfs4_stateid *s1,
6780 const nfs4_stateid *s2)
6781{
f597c537 6782 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6783}
6784
6785
17280175 6786static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6787 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6788 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6789 .recover_open = nfs4_open_reclaim,
6790 .recover_lock = nfs4_lock_reclaim,
591d71cb 6791 .establish_clid = nfs4_init_clientid,
90a16617 6792 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6793 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6794};
6795
591d71cb 6796#if defined(CONFIG_NFS_V4_1)
17280175 6797static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6798 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6799 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6800 .recover_open = nfs4_open_reclaim,
6801 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6802 .establish_clid = nfs41_init_clientid,
b4b82607 6803 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6804 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6805 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6806};
6807#endif /* CONFIG_NFS_V4_1 */
6808
17280175 6809static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6810 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6811 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6812 .recover_open = nfs4_open_expired,
6813 .recover_lock = nfs4_lock_expired,
6814 .establish_clid = nfs4_init_clientid,
90a16617 6815 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6816};
6817
6818#if defined(CONFIG_NFS_V4_1)
17280175 6819static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6820 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6821 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6822 .recover_open = nfs41_open_expired,
6823 .recover_lock = nfs41_lock_expired,
4d643d1d 6824 .establish_clid = nfs41_init_clientid,
b4b82607 6825 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6826};
591d71cb 6827#endif /* CONFIG_NFS_V4_1 */
1da177e4 6828
17280175 6829static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6830 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6831 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6832 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6833};
6834
6835#if defined(CONFIG_NFS_V4_1)
17280175 6836static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6837 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6838 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6839 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6840};
6841#endif
6842
97dc1359
TM		 6843static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6844 .minor_version = 0,
39c6daae
TM		 6845 .init_caps = NFS_CAP_READDIRPLUS
6846 | NFS_CAP_ATOMIC_OPEN
6847 | NFS_CAP_CHANGE_ATTR
6848 | NFS_CAP_POSIX_LOCK,
97dc1359 6849 .call_sync = _nfs4_call_sync,
36281caa 6850 .match_stateid = nfs4_match_stateid,
fca78d6d 6851 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6852 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6853 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6854 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6855};
6856
6857#if defined(CONFIG_NFS_V4_1)
6858static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6859 .minor_version = 1,
39c6daae
TM		 6860 .init_caps = NFS_CAP_READDIRPLUS
6861 | NFS_CAP_ATOMIC_OPEN
6862 | NFS_CAP_CHANGE_ATTR
3b66486c 6863 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 6864 | NFS_CAP_STATEID_NFSV41
6865 | NFS_CAP_ATOMIC_OPEN_V1,
104287cd 6866 .call_sync = nfs4_call_sync_sequence,
36281caa 6867 .match_stateid = nfs41_match_stateid,
fca78d6d 6868 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6869 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6870 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6871 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6872};
6873#endif
6874
97dc1359
TM		 6875const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6876 [0] = &nfs_v4_0_minor_ops,
6877#if defined(CONFIG_NFS_V4_1)
6878 [1] = &nfs_v4_1_minor_ops,
6879#endif
6880};
6881
73a79706
BS		 6882const struct inode_operations nfs4_dir_inode_operations = {
6883 .create = nfs_create,
6884 .lookup = nfs_lookup,
6885 .atomic_open = nfs_atomic_open,
6886 .link = nfs_link,
6887 .unlink = nfs_unlink,
6888 .symlink = nfs_symlink,
6889 .mkdir = nfs_mkdir,
6890 .rmdir = nfs_rmdir,
6891 .mknod = nfs_mknod,
6892 .rename = nfs_rename,
6893 .permission = nfs_permission,
6894 .getattr = nfs_getattr,
6895 .setattr = nfs_setattr,
6896 .getxattr = generic_getxattr,
6897 .setxattr = generic_setxattr,
6898 .listxattr = generic_listxattr,
6899 .removexattr = generic_removexattr,
6900};
6901
92e1d5be 6902static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6903 .permission = nfs_permission,
6904 .getattr = nfs_getattr,
6905 .setattr = nfs_setattr,
64c2ce8b
AK		 6906 .getxattr = generic_getxattr,
6907 .setxattr = generic_setxattr,
6908 .listxattr = generic_listxattr,
6909 .removexattr = generic_removexattr,
6b3b5496
BF		 6910};
6911
509de811 6912const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6913 .version = 4, /* protocol version */
6914 .dentry_ops = &nfs4_dentry_operations,
6915 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6916 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6917 .file_ops = &nfs4_file_operations,
1da177e4 6918 .getroot = nfs4_proc_get_root,
281cad46 6919 .submount = nfs4_submount,
ff9099f2 6920 .try_mount = nfs4_try_mount,
1da177e4
LT		 6921 .getattr = nfs4_proc_getattr,
6922 .setattr = nfs4_proc_setattr,
6923 .lookup = nfs4_proc_lookup,
6924 .access = nfs4_proc_access,
6925 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6926 .create = nfs4_proc_create,
6927 .remove = nfs4_proc_remove,
6928 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6929 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6930 .unlink_done = nfs4_proc_unlink_done,
6931 .rename = nfs4_proc_rename,
d3d4152a 6932 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6933 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6934 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6935 .link = nfs4_proc_link,
6936 .symlink = nfs4_proc_symlink,
6937 .mkdir = nfs4_proc_mkdir,
6938 .rmdir = nfs4_proc_remove,
6939 .readdir = nfs4_proc_readdir,
6940 .mknod = nfs4_proc_mknod,
6941 .statfs = nfs4_proc_statfs,
6942 .fsinfo = nfs4_proc_fsinfo,
6943 .pathconf = nfs4_proc_pathconf,
e9326dca 6944 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6945 .decode_dirent = nfs4_decode_dirent,
6946 .read_setup = nfs4_proc_read_setup,
1abb5088 6947 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 6948 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6949 .read_done = nfs4_read_done,
1da177e4 6950 .write_setup = nfs4_proc_write_setup,
57208fa7 6951 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 6952 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6953 .write_done = nfs4_write_done,
1da177e4 6954 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 6955 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 6956 .commit_done = nfs4_commit_done,
1da177e4 6957 .lock = nfs4_proc_lock,
e50a1c2e 6958 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6959 .close_context = nfs4_close_context,
2b484297 6960 .open_context = nfs4_atomic_open,
011e2a7f 6961 .have_delegation = nfs4_have_delegation,
57ec14c5 6962 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 6963 .alloc_client = nfs4_alloc_client,
45a52a02 6964 .init_client = nfs4_init_client,
cdb7eced 6965 .free_client = nfs4_free_client,
1179acc6
BS		 6966 .create_server = nfs4_create_server,
6967 .clone_server = nfs_clone_server,
1da177e4
LT		 6968};
6969
64c2ce8b
AK		 6970static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6971 .prefix = XATTR_NAME_NFSV4_ACL,
6972 .list = nfs4_xattr_list_nfs4_acl,
6973 .get = nfs4_xattr_get_nfs4_acl,
6974 .set = nfs4_xattr_set_nfs4_acl,
6975};
6976
6977const struct xattr_handler *nfs4_xattr_handlers[] = {
6978 &nfs4_xattr_nfs4_acl_handler,
6979 NULL
6980};
6981
1da177e4
LT		 6982/*
6983 * Local variables:
6984 * c-basic-offset: 8
6985 * End:
6986 */
Linux 6.x block layer and io_uring tree(s)