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NFSv4.1: Add xdr support for CLAIM_FH and CLAIM_DELEG_CUR_FH opens
[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;
52567b03 110 default:
1da177e4 111 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 112 __func__, -err);
52567b03 113 break;
1da177e4 114 }
52567b03 115 return -EIO;
1da177e4
LT		 116}
117
118/*
119 * This is our standard bitmap for GETATTR requests.
120 */
1549210f 121const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 122 FATTR4_WORD0_TYPE
123 | FATTR4_WORD0_CHANGE
124 | FATTR4_WORD0_SIZE
125 | FATTR4_WORD0_FSID
126 | FATTR4_WORD0_FILEID,
127 FATTR4_WORD1_MODE
128 | FATTR4_WORD1_NUMLINKS
129 | FATTR4_WORD1_OWNER
130 | FATTR4_WORD1_OWNER_GROUP
131 | FATTR4_WORD1_RAWDEV
132 | FATTR4_WORD1_SPACE_USED
133 | FATTR4_WORD1_TIME_ACCESS
134 | FATTR4_WORD1_TIME_METADATA
135 | FATTR4_WORD1_TIME_MODIFY
136};
137
1549210f
TM		 138static const u32 nfs4_pnfs_open_bitmap[3] = {
139 FATTR4_WORD0_TYPE
140 | FATTR4_WORD0_CHANGE
141 | FATTR4_WORD0_SIZE
142 | FATTR4_WORD0_FSID
143 | FATTR4_WORD0_FILEID,
144 FATTR4_WORD1_MODE
145 | FATTR4_WORD1_NUMLINKS
146 | FATTR4_WORD1_OWNER
147 | FATTR4_WORD1_OWNER_GROUP
148 | FATTR4_WORD1_RAWDEV
149 | FATTR4_WORD1_SPACE_USED
150 | FATTR4_WORD1_TIME_ACCESS
151 | FATTR4_WORD1_TIME_METADATA
152 | FATTR4_WORD1_TIME_MODIFY,
153 FATTR4_WORD2_MDSTHRESHOLD
154};
155
e23008ec
AA		 156static const u32 nfs4_open_noattr_bitmap[3] = {
157 FATTR4_WORD0_TYPE
158 | FATTR4_WORD0_CHANGE
159 | FATTR4_WORD0_FILEID,
160};
161
1da177e4
LT		 162const u32 nfs4_statfs_bitmap[2] = {
163 FATTR4_WORD0_FILES_AVAIL
164 | FATTR4_WORD0_FILES_FREE
165 | FATTR4_WORD0_FILES_TOTAL,
166 FATTR4_WORD1_SPACE_AVAIL
167 | FATTR4_WORD1_SPACE_FREE
168 | FATTR4_WORD1_SPACE_TOTAL
169};
170
4ce79717 171const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 172 FATTR4_WORD0_MAXLINK
173 | FATTR4_WORD0_MAXNAME,
174 0
175};
176
dae100c2 177const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 178 | FATTR4_WORD0_MAXREAD
179 | FATTR4_WORD0_MAXWRITE
180 | FATTR4_WORD0_LEASE_TIME,
55b6e774 181 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 182 | FATTR4_WORD1_FS_LAYOUT_TYPES,
183 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 184};
185
830b8e33
MN		 186const u32 nfs4_fs_locations_bitmap[2] = {
187 FATTR4_WORD0_TYPE
188 | FATTR4_WORD0_CHANGE
189 | FATTR4_WORD0_SIZE
190 | FATTR4_WORD0_FSID
191 | FATTR4_WORD0_FILEID
192 | FATTR4_WORD0_FS_LOCATIONS,
193 FATTR4_WORD1_MODE
194 | FATTR4_WORD1_NUMLINKS
195 | FATTR4_WORD1_OWNER
196 | FATTR4_WORD1_OWNER_GROUP
197 | FATTR4_WORD1_RAWDEV
198 | FATTR4_WORD1_SPACE_USED
199 | FATTR4_WORD1_TIME_ACCESS
200 | FATTR4_WORD1_TIME_METADATA
201 | FATTR4_WORD1_TIME_MODIFY
202 | FATTR4_WORD1_MOUNTED_ON_FILEID
203};
204
bc4785cd 205static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 206 struct nfs4_readdir_arg *readdir)
207{
0dbb4c67 208 __be32 *start, *p;
1da177e4 209
1da177e4 210 if (cookie > 2) {
b7ef1956 211 readdir->cookie = cookie;
1da177e4
LT		 212 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
213 return;
214 }
215
216 readdir->cookie = 0;
217 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
218 if (cookie == 2)
219 return;
220
221 /*
222 * NFSv4 servers do not return entries for '.' and '..'
223 * Therefore, we fake these entries here. We let '.'
224 * have cookie 0 and '..' have cookie 1. Note that
225 * when talking to the server, we always send cookie 0
226 * instead of 1 or 2.
227 */
2b86ce2d 228 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 229
230 if (cookie == 0) {
231 *p++ = xdr_one; /* next */
232 *p++ = xdr_zero; /* cookie, first word */
233 *p++ = xdr_one; /* cookie, second word */
234 *p++ = xdr_one; /* entry len */
235 memcpy(p, ".\0\0\0", 4); /* entry */
236 p++;
237 *p++ = xdr_one; /* bitmap length */
238 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
239 *p++ = htonl(8); /* attribute buffer length */
4e769b93 240 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 241 }
242
243 *p++ = xdr_one; /* next */
244 *p++ = xdr_zero; /* cookie, first word */
245 *p++ = xdr_two; /* cookie, second word */
246 *p++ = xdr_two; /* entry len */
247 memcpy(p, "..\0\0", 4); /* entry */
248 p++;
249 *p++ = xdr_one; /* bitmap length */
250 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
251 *p++ = htonl(8); /* attribute buffer length */
4e769b93 252 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 253
254 readdir->pgbase = (char *)p - (char *)start;
255 readdir->count -= readdir->pgbase;
2b86ce2d 256 kunmap_atomic(start);
1da177e4
LT		 257}
258
65de872e
TM		 259static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
260{
261 int res = 0;
262
263 might_sleep();
264
265 if (*timeout <= 0)
266 *timeout = NFS4_POLL_RETRY_MIN;
267 if (*timeout > NFS4_POLL_RETRY_MAX)
268 *timeout = NFS4_POLL_RETRY_MAX;
d310310c 269 freezable_schedule_timeout_killable(*timeout);
65de872e
TM		 270 if (fatal_signal_pending(current))
271 res = -ERESTARTSYS;
272 *timeout <<= 1;
273 return res;
274}
275
276/* This is the error handling routine for processes that are allowed
277 * to sleep.
278 */
b064eca2 279static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 280{
281 struct nfs_client *clp = server->nfs_client;
9e33bed5 282 struct nfs4_state *state = exception->state;
3114ea7a 283 struct inode *inode = exception->inode;
65de872e
TM		 284 int ret = errorcode;
285
286 exception->retry = 0;
287 switch(errorcode) {
288 case 0:
289 return 0;
3114ea7a 290 case -NFS4ERR_OPENMODE:
011e2a7f 291 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 292 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 293 exception->retry = 1;
294 return 0;
295 }
296 if (state == NULL)
297 break;
5d422301
TM		 298 ret = nfs4_schedule_stateid_recovery(server, state);
299 if (ret < 0)
300 break;
3114ea7a 301 goto wait_on_recovery;
a1d0b5ee 302 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 303 case -NFS4ERR_ADMIN_REVOKED:
304 case -NFS4ERR_BAD_STATEID:
9e33bed5
TM		 305 if (state == NULL)
306 break;
14977489 307 nfs_remove_bad_delegation(state->inode);
5d422301
TM		 308 ret = nfs4_schedule_stateid_recovery(server, state);
309 if (ret < 0)
310 break;
0400a6b0 311 goto wait_on_recovery;
0ced63d1 312 case -NFS4ERR_EXPIRED:
5d422301
TM		 313 if (state != NULL) {
314 ret = nfs4_schedule_stateid_recovery(server, state);
315 if (ret < 0)
316 break;
317 }
65de872e 318 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 319 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 320 nfs4_schedule_lease_recovery(clp);
321 goto wait_on_recovery;
03391693 322#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 323 case -NFS4ERR_BADSESSION:
324 case -NFS4ERR_BADSLOT:
325 case -NFS4ERR_BAD_HIGH_SLOT:
326 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
327 case -NFS4ERR_DEADSESSION:
328 case -NFS4ERR_SEQ_FALSE_RETRY:
329 case -NFS4ERR_SEQ_MISORDERED:
330 dprintk("%s ERROR: %d Reset session\n", __func__,
331 errorcode);
9f594791 332 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 333 goto wait_on_recovery;
03391693 334#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 335 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 336 if (exception->timeout > HZ) {
337 /* We have retried a decent amount, time to
338 * fail
339 */
340 ret = -EBUSY;
341 break;
342 }
65de872e
TM		 343 case -NFS4ERR_GRACE:
344 case -NFS4ERR_DELAY:
345 ret = nfs4_delay(server->client, &exception->timeout);
346 if (ret != 0)
347 break;
a8a4ae3a 348 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 349 case -NFS4ERR_OLD_STATEID:
350 exception->retry = 1;
b064eca2
TM		 351 break;
352 case -NFS4ERR_BADOWNER:
353 /* The following works around a Linux server bug! */
354 case -NFS4ERR_BADNAME:
355 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
356 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
357 exception->retry = 1;
358 printk(KERN_WARNING "NFS: v4 server %s "
359 "does not accept raw "
360 "uid/gids. "
361 "Reenabling the idmapper.\n",
362 server->nfs_client->cl_hostname);
363 }
65de872e
TM		 364 }
365 /* We failed to handle the error */
366 return nfs4_map_errors(ret);
0400a6b0 367wait_on_recovery:
a2c0b9e2
TM		 368 ret = nfs4_wait_clnt_recover(clp);
369 if (ret == 0)
370 exception->retry = 1;
371 return ret;
65de872e
TM		 372}
373
374
452e9352 375static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 376{
1da177e4
LT		 377 spin_lock(&clp->cl_lock);
378 if (time_before(clp->cl_last_renewal,timestamp))
379 clp->cl_last_renewal = timestamp;
380 spin_unlock(&clp->cl_lock);
381}
382
452e9352
TM		 383static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
384{
385 do_renew_lease(server->nfs_client, timestamp);
386}
387
cccef3b9
AA		 388#if defined(CONFIG_NFS_V4_1)
389
d185a334 390static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 391{
e3725ec0 392 struct nfs4_session *session;
13615871 393 struct nfs4_slot_table *tbl;
c10e4498 394 bool send_new_highest_used_slotid = false;
13615871 395
dfb4f309 396 if (!res->sr_slot) {
13615871
AA		 397 /* just wake up the next guy waiting since
398 * we may have not consumed a slot after all */
691daf3b 399 dprintk("%s: No slot\n", __func__);
35dc1d74 400 return;
13615871 401 }
e3725ec0
TM		 402 tbl = res->sr_slot->table;
403 session = tbl->session;
ea028ac9 404
35dc1d74 405 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 406 /* Be nice to the server: try to ensure that the last transmitted
407 * value for highest_user_slotid <= target_highest_slotid
408 */
409 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
410 send_new_highest_used_slotid = true;
411
b75ad4cd
TM		 412 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
413 send_new_highest_used_slotid = false;
414 goto out_unlock;
415 }
f4af6e2a 416 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 417
418 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
419 send_new_highest_used_slotid = false;
b75ad4cd 420out_unlock:
35dc1d74 421 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 422 res->sr_slot = NULL;
c10e4498
TM		 423 if (send_new_highest_used_slotid)
424 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 425}
426
14516c3a 427static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 428{
e3725ec0 429 struct nfs4_session *session;
933602e3 430 struct nfs4_slot *slot;
14516c3a 431 struct nfs_client *clp;
ac20d163 432 bool interrupted = false;
85563073 433 int ret = 1;
b0df806c 434
468f8613
BS		 435 /* don't increment the sequence number if the task wasn't sent */
436 if (!RPC_WAS_SENT(task))
b0df806c
AA		 437 goto out;
438
933602e3 439 slot = res->sr_slot;
e3725ec0 440 session = slot->table->session;
933602e3 441
ac20d163
TM		 442 if (slot->interrupted) {
443 slot->interrupted = 0;
444 interrupted = true;
445 }
446
691daf3b 447 /* Check the SEQUENCE operation status */
14516c3a
TM		 448 switch (res->sr_status) {
449 case 0:
b0df806c 450 /* Update the slot's sequence and clientid lease timer */
933602e3 451 ++slot->seq_nr;
e3725ec0 452 clp = session->clp;
8e63b6a8 453 do_renew_lease(clp, res->sr_timestamp);
0629e370 454 /* Check sequence flags */
b4410c2f
TM		 455 if (res->sr_status_flags != 0)
456 nfs4_schedule_lease_recovery(clp);
464ee9f9 457 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 458 break;
ac20d163
TM		 459 case 1:
460 /*
461 * sr_status remains 1 if an RPC level error occurred.
462 * The server may or may not have processed the sequence
463 * operation..
464 * Mark the slot as having hosted an interrupted RPC call.
465 */
466 slot->interrupted = 1;
467 goto out;
14516c3a
TM		 468 case -NFS4ERR_DELAY:
469 /* The server detected a resend of the RPC call and
470 * returned NFS4ERR_DELAY as per Section 2.10.6.2
471 * of RFC5661.
472 */
df2fabff 473 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 474 __func__,
df2fabff 475 slot->slot_nr,
933602e3 476 slot->seq_nr);
14516c3a 477 goto out_retry;
85563073
TM		 478 case -NFS4ERR_BADSLOT:
479 /*
480 * The slot id we used was probably retired. Try again
481 * using a different slot id.
482 */
e8794440
TM		 483 goto retry_nowait;
484 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 485 /*
486 * Was the last operation on this sequence interrupted?
487 * If so, retry after bumping the sequence number.
488 */
489 if (interrupted) {
490 ++slot->seq_nr;
491 goto retry_nowait;
492 }
e8794440
TM		 493 /*
494 * Could this slot have been previously retired?
495 * If so, then the server may be expecting seq_nr = 1!
496 */
8e63b6a8
TM		 497 if (slot->seq_nr != 1) {
498 slot->seq_nr = 1;
499 goto retry_nowait;
500 }
501 break;
e8794440
TM		 502 case -NFS4ERR_SEQ_FALSE_RETRY:
503 ++slot->seq_nr;
504 goto retry_nowait;
14516c3a
TM		 505 default:
506 /* Just update the slot sequence no. */
933602e3 507 ++slot->seq_nr;
b0df806c
AA		 508 }
509out:
510 /* The session may be reset by one of the error handlers. */
511 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 512 nfs41_sequence_free_slot(res);
85563073 513 return ret;
e8794440
TM		 514retry_nowait:
515 if (rpc_restart_call_prepare(task)) {
516 task->tk_status = 0;
517 ret = 0;
518 }
519 goto out;
14516c3a 520out_retry:
d05dd4e9 521 if (!rpc_restart_call(task))
14516c3a
TM		 522 goto out;
523 rpc_delay(task, NFS4_POLL_RETRY_MAX);
524 return 0;
b0df806c
AA		 525}
526
14516c3a
TM		 527static int nfs4_sequence_done(struct rpc_task *task,
528 struct nfs4_sequence_res *res)
df896455 529{
e3725ec0 530 if (res->sr_slot == NULL)
14516c3a
TM		 531 return 1;
532 return nfs41_sequence_done(task, res);
df896455
TM		 533}
534
9d12b216
TM		 535static void nfs41_init_sequence(struct nfs4_sequence_args *args,
536 struct nfs4_sequence_res *res, int cache_reply)
537{
2b2fa717 538 args->sa_slot = NULL;
9d12b216 539 args->sa_cache_this = 0;
8fe72bac 540 args->sa_privileged = 0;
9d12b216
TM		 541 if (cache_reply)
542 args->sa_cache_this = 1;
9d12b216
TM		 543 res->sr_slot = NULL;
544}
545
8fe72bac
TM		 546static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
547{
548 args->sa_privileged = 1;
549}
550
dc70d7b3 551int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 552 struct nfs4_sequence_args *args,
553 struct nfs4_sequence_res *res,
ce5039c1
AA		 554 struct rpc_task *task)
555{
fbcd4abc
AA		 556 struct nfs4_slot *slot;
557 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 558
559 dprintk("--> %s\n", __func__);
ce5039c1 560 /* slot already allocated? */
dfb4f309 561 if (res->sr_slot != NULL)
d9afbd1b 562 goto out_success;
ce5039c1 563
fbcd4abc
AA		 564 tbl = &session->fc_slot_table;
565
69d206b5
TM		 566 task->tk_timeout = 0;
567
fbcd4abc 568 spin_lock(&tbl->slot_tbl_lock);
a2118c33 569 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
8fe72bac 570 !args->sa_privileged) {
0b1c8fc4 571 /* The state manager will wait until the slot table is empty */
0b1c8fc4 572 dprintk("%s session is draining\n", __func__);
7b939a3f 573 goto out_sleep;
689cf5c1
AB		 574 }
575
2dc03b7f 576 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 577 if (IS_ERR(slot)) {
578 /* If out of memory, try again in 1/4 second */
579 if (slot == ERR_PTR(-ENOMEM))
580 task->tk_timeout = HZ >> 2;
fbcd4abc 581 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 582 goto out_sleep;
fbcd4abc
AA		 583 }
584 spin_unlock(&tbl->slot_tbl_lock);
585
2b2fa717 586 args->sa_slot = slot;
fbcd4abc 587
2dc03b7f
TM		 588 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
589 slot->slot_nr, slot->seq_nr);
fbcd4abc 590
dfb4f309 591 res->sr_slot = slot;
8e63b6a8 592 res->sr_timestamp = jiffies;
2a6e26cd 593 res->sr_status_flags = 0;
fbcd4abc
AA		 594 /*
595 * sr_status is only set in decode_sequence, and so will remain
596 * set to 1 if an rpc level failure occurs.
597 */
598 res->sr_status = 1;
d9afbd1b
TM		 599out_success:
600 rpc_call_start(task);
ce5039c1 601 return 0;
7b939a3f 602out_sleep:
8fe72bac
TM		 603 /* Privileged tasks are queued with top priority */
604 if (args->sa_privileged)
1e1093c7
TM		 605 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
606 NULL, RPC_PRIORITY_PRIVILEGED);
607 else
608 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 609 spin_unlock(&tbl->slot_tbl_lock);
610 return -EAGAIN;
ce5039c1 611}
dc70d7b3 612EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 613
035168ab 614int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 615 struct nfs4_sequence_args *args,
616 struct nfs4_sequence_res *res,
ce5039c1
AA		 617 struct rpc_task *task)
618{
035168ab 619 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 620 int ret = 0;
621
d9afbd1b
TM		 622 if (session == NULL) {
623 rpc_call_start(task);
035168ab 624 goto out;
d9afbd1b 625 }
035168ab 626
df2fabff 627 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 628 __func__, session->clp, session, res->sr_slot ?
df2fabff 629 res->sr_slot->slot_nr : -1);
ce5039c1 630
9d12b216 631 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 632out:
633 dprintk("<-- %s status=%d\n", __func__, ret);
634 return ret;
635}
636
637struct nfs41_call_sync_data {
035168ab 638 const struct nfs_server *seq_server;
ce5039c1
AA		 639 struct nfs4_sequence_args *seq_args;
640 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 641};
642
643static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
644{
645 struct nfs41_call_sync_data *data = calldata;
6ba7db34 646 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 647
035168ab
TM		 648 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
649
d9afbd1b 650 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 651}
652
69ab40c4
AA		 653static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
654{
655 struct nfs41_call_sync_data *data = calldata;
656
14516c3a 657 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 658}
659
17280175 660static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 661 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 662 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 663};
664
7c513058
BS		 665static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
666 struct nfs_server *server,
ce5039c1
AA		 667 struct rpc_message *msg,
668 struct nfs4_sequence_args *args,
8fe72bac 669 struct nfs4_sequence_res *res)
ce5039c1
AA		 670{
671 int ret;
672 struct rpc_task *task;
673 struct nfs41_call_sync_data data = {
035168ab 674 .seq_server = server,
ce5039c1
AA		 675 .seq_args = args,
676 .seq_res = res,
ce5039c1
AA		 677 };
678 struct rpc_task_setup task_setup = {
7c513058 679 .rpc_client = clnt,
ce5039c1
AA		 680 .rpc_message = msg,
681 .callback_ops = &nfs41_call_sync_ops,
682 .callback_data = &data
683 };
684
ce5039c1
AA		 685 task = rpc_run_task(&task_setup);
686 if (IS_ERR(task))
687 ret = PTR_ERR(task);
688 else {
689 ret = task->tk_status;
690 rpc_put_task(task);
691 }
692 return ret;
693}
694
df896455 695#else
8fe72bac 696static
9d12b216
TM		 697void nfs41_init_sequence(struct nfs4_sequence_args *args,
698 struct nfs4_sequence_res *res, int cache_reply)
699{
700}
701
8fe72bac
TM		 702static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
703{
704}
705
706
14516c3a
TM		 707static int nfs4_sequence_done(struct rpc_task *task,
708 struct nfs4_sequence_res *res)
df896455 709{
14516c3a 710 return 1;
df896455 711}
cccef3b9
AA		 712#endif /* CONFIG_NFS_V4_1 */
713
fd0c0953 714static
7c513058
BS		 715int _nfs4_call_sync(struct rpc_clnt *clnt,
716 struct nfs_server *server,
cccef3b9
AA		 717 struct rpc_message *msg,
718 struct nfs4_sequence_args *args,
fd0c0953 719 struct nfs4_sequence_res *res)
cccef3b9 720{
7c513058 721 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 722}
723
fd0c0953 724static
7c513058
BS		 725int nfs4_call_sync(struct rpc_clnt *clnt,
726 struct nfs_server *server,
e73b83f2
BS		 727 struct rpc_message *msg,
728 struct nfs4_sequence_args *args,
729 struct nfs4_sequence_res *res,
730 int cache_reply)
731{
fd0c0953 732 nfs41_init_sequence(args, res, cache_reply);
7c513058 733 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
fd0c0953 734 args, res);
e73b83f2 735}
cccef3b9 736
38478b24 737static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 738{
38478b24 739 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 740
38478b24 741 spin_lock(&dir->i_lock);
359d7d1c 742 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 743 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 744 nfs_force_lookup_revalidate(dir);
a9a4a87a 745 dir->i_version = cinfo->after;
de242c0b 746 nfs_fscache_invalidate(dir);
38478b24 747 spin_unlock(&dir->i_lock);
1da177e4
LT		 748}
749
e56e0b78 750struct nfs4_opendata {
c6d00e63 751 struct kref kref;
e56e0b78
TM		 752 struct nfs_openargs o_arg;
753 struct nfs_openres o_res;
cdd4e68b
TM		 754 struct nfs_open_confirmargs c_arg;
755 struct nfs_open_confirmres c_res;
6926afd1
TM		 756 struct nfs4_string owner_name;
757 struct nfs4_string group_name;
e56e0b78 758 struct nfs_fattr f_attr;
e56e0b78 759 struct dentry *dir;
82a2c1b7 760 struct dentry *dentry;
e56e0b78 761 struct nfs4_state_owner *owner;
aac00a8d 762 struct nfs4_state *state;
e56e0b78 763 struct iattr attrs;
26e976a8 764 unsigned long timestamp;
3e309914 765 unsigned int rpc_done : 1;
24ac23ab
TM		 766 int rpc_status;
767 int cancelled;
e56e0b78
TM		 768};
769
2ced46c2
TM		 770
771static void nfs4_init_opendata_res(struct nfs4_opendata *p)
772{
773 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 774 p->o_res.seqid = p->o_arg.seqid;
775 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 776 p->o_res.server = p->o_arg.server;
5f657530 777 p->o_res.access_request = p->o_arg.access;
2ced46c2 778 nfs_fattr_init(&p->f_attr);
6926afd1 779 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 780}
781
82a2c1b7 782static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 783 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 784 const struct iattr *attrs,
4a1c0893 785 enum open_claim_type4 claim,
8535b2be 786 gfp_t gfp_mask)
e56e0b78 787{
82a2c1b7 788 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 789 struct inode *dir = parent->d_inode;
790 struct nfs_server *server = NFS_SERVER(dir);
791 struct nfs4_opendata *p;
792
8535b2be 793 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 794 if (p == NULL)
795 goto err;
8535b2be 796 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 797 if (p->o_arg.seqid == NULL)
798 goto err_free;
82a2c1b7
AV		 799 nfs_sb_active(dentry->d_sb);
800 p->dentry = dget(dentry);
e56e0b78
TM		 801 p->dir = parent;
802 p->owner = sp;
803 atomic_inc(&sp->so_count);
dc0b027d
TM		 804 p->o_arg.open_flags = flags;
805 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 806 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
807 * will return permission denied for all bits until close */
808 if (!(flags & O_EXCL)) {
809 /* ask server to check for all possible rights as results
810 * are cached */
811 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
812 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 813 }
7539bbab 814 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 815 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
816 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 817 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 818 p->o_arg.server = server;
819 p->o_arg.bitmask = server->attr_bitmask;
1549210f 820 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
4a1c0893
TM		 821 p->o_arg.claim = claim;
822 switch (claim) {
823 case NFS4_OPEN_CLAIM_NULL:
824 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
825 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
826 p->o_arg.fh = NFS_FH(dir);
827 break;
828 case NFS4_OPEN_CLAIM_PREVIOUS:
829 case NFS4_OPEN_CLAIM_FH:
830 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
831 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
832 p->o_arg.fh = NFS_FH(dentry->d_inode);
833 }
536e43d1 834 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 835 __be32 verf[2];
d77d76ff 836
e56e0b78
TM		 837 p->o_arg.u.attrs = &p->attrs;
838 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 839
840 verf[0] = jiffies;
841 verf[1] = current->pid;
842 memcpy(p->o_arg.u.verifier.data, verf,
843 sizeof(p->o_arg.u.verifier.data));
e56e0b78 844 }
cdd4e68b
TM		 845 p->c_arg.fh = &p->o_res.fh;
846 p->c_arg.stateid = &p->o_res.stateid;
847 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 848 nfs4_init_opendata_res(p);
c6d00e63 849 kref_init(&p->kref);
e56e0b78
TM		 850 return p;
851err_free:
852 kfree(p);
853err:
854 dput(parent);
855 return NULL;
856}
857
c6d00e63 858static void nfs4_opendata_free(struct kref *kref)
e56e0b78 859{
c6d00e63
TM		 860 struct nfs4_opendata *p = container_of(kref,
861 struct nfs4_opendata, kref);
82a2c1b7 862 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 863
864 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 865 if (p->state != NULL)
866 nfs4_put_open_state(p->state);
c6d00e63
TM		 867 nfs4_put_state_owner(p->owner);
868 dput(p->dir);
82a2c1b7
AV		 869 dput(p->dentry);
870 nfs_sb_deactive(sb);
6926afd1 871 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 872 kfree(p);
873}
874
875static void nfs4_opendata_put(struct nfs4_opendata *p)
876{
877 if (p != NULL)
878 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 879}
880
06f814a3
TM		 881static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
882{
06f814a3
TM		 883 int ret;
884
06f814a3 885 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 886 return ret;
887}
888
dc0b027d 889static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 890{
891 int ret = 0;
dc0b027d 892
536e43d1 893 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 894 goto out;
895 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 896 case FMODE_READ:
88069f77
TM		 897 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
898 && state->n_rdonly != 0;
6ee41268
TM		 899 break;
900 case FMODE_WRITE:
88069f77
TM		 901 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
902 && state->n_wronly != 0;
6ee41268
TM		 903 break;
904 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 905 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
906 && state->n_rdwr != 0;
6ee41268 907 }
dc0b027d 908out:
6ee41268
TM		 909 return ret;
910}
911
dc0b027d 912static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 913{
652f89f6
TM		 914 if (delegation == NULL)
915 return 0;
dc0b027d 916 if ((delegation->type & fmode) != fmode)
aac00a8d 917 return 0;
15c831bf 918 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 919 return 0;
d25be546
TM		 920 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
921 return 0;
b7391f44 922 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 923 return 1;
924}
925
dc0b027d 926static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 927{
dc0b027d 928 switch (fmode) {
e7616923
TM		 929 case FMODE_WRITE:
930 state->n_wronly++;
931 break;
932 case FMODE_READ:
933 state->n_rdonly++;
934 break;
935 case FMODE_READ|FMODE_WRITE:
936 state->n_rdwr++;
937 }
dc0b027d 938 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 939}
940
dc0b027d 941static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 942{
943 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 944 nfs4_stateid_copy(&state->stateid, stateid);
945 nfs4_stateid_copy(&state->open_stateid, stateid);
dc0b027d 946 switch (fmode) {
003707c7
TM		 947 case FMODE_READ:
948 set_bit(NFS_O_RDONLY_STATE, &state->flags);
949 break;
950 case FMODE_WRITE:
951 set_bit(NFS_O_WRONLY_STATE, &state->flags);
952 break;
953 case FMODE_READ|FMODE_WRITE:
954 set_bit(NFS_O_RDWR_STATE, &state->flags);
955 }
e7616923
TM		 956}
957
dc0b027d 958static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 959{
8bda4e4c 960 write_seqlock(&state->seqlock);
dc0b027d 961 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 962 write_sequnlock(&state->seqlock);
003707c7
TM		 963}
964
dc0b027d 965static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 966{
8bda4e4c
TM		 967 /*
968 * Protect the call to nfs4_state_set_mode_locked and
969 * serialise the stateid update
970 */
971 write_seqlock(&state->seqlock);
003707c7 972 if (deleg_stateid != NULL) {
f597c537 973 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 974 set_bit(NFS_DELEGATED_STATE, &state->flags);
975 }
976 if (open_stateid != NULL)
dc0b027d 977 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 978 write_sequnlock(&state->seqlock);
979 spin_lock(&state->owner->so_lock);
dc0b027d 980 update_open_stateflags(state, fmode);
ec073428 981 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 982}
983
dc0b027d 984static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 985{
986 struct nfs_inode *nfsi = NFS_I(state->inode);
987 struct nfs_delegation *deleg_cur;
988 int ret = 0;
989
dc0b027d 990 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 991
992 rcu_read_lock();
993 deleg_cur = rcu_dereference(nfsi->delegation);
994 if (deleg_cur == NULL)
995 goto no_delegation;
996
997 spin_lock(&deleg_cur->lock);
998 if (nfsi->delegation != deleg_cur ||
d25be546 999 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1000 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1001 goto no_delegation_unlock;
1002
1003 if (delegation == NULL)
1004 delegation = &deleg_cur->stateid;
f597c537 1005 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1006 goto no_delegation_unlock;
1007
b7391f44 1008 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1009 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1010 ret = 1;
1011no_delegation_unlock:
1012 spin_unlock(&deleg_cur->lock);
1013no_delegation:
1014 rcu_read_unlock();
1015
1016 if (!ret && open_stateid != NULL) {
dc0b027d 1017 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1018 ret = 1;
1019 }
1020
1021 return ret;
1022}
1023
1024
dc0b027d 1025static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1026{
1027 struct nfs_delegation *delegation;
1028
1029 rcu_read_lock();
1030 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1031 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1032 rcu_read_unlock();
1033 return;
1034 }
1035 rcu_read_unlock();
57ec14c5 1036 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1037}
1038
6ee41268 1039static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1040{
1041 struct nfs4_state *state = opendata->state;
1042 struct nfs_inode *nfsi = NFS_I(state->inode);
1043 struct nfs_delegation *delegation;
536e43d1 1044 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1045 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1046 nfs4_stateid stateid;
1047 int ret = -EAGAIN;
1048
aac00a8d 1049 for (;;) {
dc0b027d 1050 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1051 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1052 if (can_open_cached(state, fmode, open_mode)) {
1053 update_open_stateflags(state, fmode);
6ee41268 1054 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1055 goto out_return_state;
1056 }
1057 spin_unlock(&state->owner->so_lock);
1058 }
34310430
TM		 1059 rcu_read_lock();
1060 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1061 if (!can_open_delegated(delegation, fmode)) {
34310430 1062 rcu_read_unlock();
aac00a8d 1063 break;
34310430 1064 }
aac00a8d 1065 /* Save the delegation */
f597c537 1066 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1067 rcu_read_unlock();
af22f94a 1068 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1069 if (ret != 0)
1070 goto out;
1071 ret = -EAGAIN;
34310430
TM		 1072
1073 /* Try to update the stateid using the delegation */
dc0b027d 1074 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1075 goto out_return_state;
aac00a8d 1076 }
aac00a8d
TM		 1077out:
1078 return ERR_PTR(ret);
1079out_return_state:
1080 atomic_inc(&state->count);
1081 return state;
1082}
1083
e23008ec
AA		 1084static void
1085nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1086{
1087 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1088 struct nfs_delegation *delegation;
1089 int delegation_flags = 0;
1090
1091 rcu_read_lock();
1092 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1093 if (delegation)
1094 delegation_flags = delegation->flags;
1095 rcu_read_unlock();
1096 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1097 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1098 "returning a delegation for "
1099 "OPEN(CLAIM_DELEGATE_CUR)\n",
1100 clp->cl_hostname);
1101 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1102 nfs_inode_set_delegation(state->inode,
1103 data->owner->so_cred,
1104 &data->o_res);
1105 else
1106 nfs_inode_reclaim_delegation(state->inode,
1107 data->owner->so_cred,
1108 &data->o_res);
1109}
1110
1111/*
1112 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1113 * and update the nfs4_state.
1114 */
1115static struct nfs4_state *
1116_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1117{
1118 struct inode *inode = data->state->inode;
1119 struct nfs4_state *state = data->state;
1120 int ret;
1121
1122 if (!data->rpc_done) {
1123 ret = data->rpc_status;
1124 goto err;
1125 }
1126
1127 ret = -ESTALE;
1128 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1129 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1130 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1131 goto err;
1132
1133 ret = -ENOMEM;
1134 state = nfs4_get_open_state(inode, data->owner);
1135 if (state == NULL)
1136 goto err;
1137
1138 ret = nfs_refresh_inode(inode, &data->f_attr);
1139 if (ret)
1140 goto err;
1141
1142 if (data->o_res.delegation_type != 0)
1143 nfs4_opendata_check_deleg(data, state);
1144 update_open_stateid(state, &data->o_res.stateid, NULL,
1145 data->o_arg.fmode);
1146
1147 return state;
1148err:
1149 return ERR_PTR(ret);
1150
1151}
1152
1153static struct nfs4_state *
1154_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1155{
1156 struct inode *inode;
1157 struct nfs4_state *state = NULL;
1b370bc2 1158 int ret;
24ac23ab 1159
aac00a8d 1160 if (!data->rpc_done) {
6ee41268 1161 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1162 goto out;
1163 }
1164
1b370bc2 1165 ret = -EAGAIN;
24ac23ab 1166 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1167 goto err;
24ac23ab 1168 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1169 ret = PTR_ERR(inode);
03f28e3a 1170 if (IS_ERR(inode))
1b370bc2
TM		 1171 goto err;
1172 ret = -ENOMEM;
24ac23ab
TM		 1173 state = nfs4_get_open_state(inode, data->owner);
1174 if (state == NULL)
1b370bc2 1175 goto err_put_inode;
e23008ec
AA		 1176 if (data->o_res.delegation_type != 0)
1177 nfs4_opendata_check_deleg(data, state);
34310430 1178 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1179 data->o_arg.fmode);
24ac23ab 1180 iput(inode);
aac00a8d 1181out:
7aa262b5 1182 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1183 return state;
1b370bc2
TM		 1184err_put_inode:
1185 iput(inode);
1186err:
1187 return ERR_PTR(ret);
24ac23ab
TM		 1188}
1189
e23008ec
AA		 1190static struct nfs4_state *
1191nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1192{
1193 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1194 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1195 return _nfs4_opendata_to_nfs4_state(data);
1196}
1197
864472e9
TM		 1198static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1199{
1200 struct nfs_inode *nfsi = NFS_I(state->inode);
1201 struct nfs_open_context *ctx;
1202
1203 spin_lock(&state->inode->i_lock);
1204 list_for_each_entry(ctx, &nfsi->open_files, list) {
1205 if (ctx->state != state)
1206 continue;
1207 get_nfs_open_context(ctx);
1208 spin_unlock(&state->inode->i_lock);
1209 return ctx;
1210 }
1211 spin_unlock(&state->inode->i_lock);
1212 return ERR_PTR(-ENOENT);
1213}
1214
4a1c0893
TM		 1215static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1216 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1217{
1218 struct nfs4_opendata *opendata;
1219
4a1c0893
TM		 1220 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1221 NULL, claim, GFP_NOFS);
6f220ed5
TM		 1222 if (opendata == NULL)
1223 return ERR_PTR(-ENOMEM);
1224 opendata->state = state;
1225 atomic_inc(&state->count);
1226 return opendata;
1227}
1228
dc0b027d 1229static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1230{
2ced46c2 1231 struct nfs4_state *newstate;
864472e9
TM		 1232 int ret;
1233
dc0b027d
TM		 1234 opendata->o_arg.open_flags = 0;
1235 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1236 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1237 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1238 nfs4_init_opendata_res(opendata);
b257957e 1239 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1240 if (ret != 0)
1241 return ret;
2ced46c2 1242 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1243 if (IS_ERR(newstate))
1244 return PTR_ERR(newstate);
643168c2 1245 nfs4_close_state(newstate, fmode);
2ced46c2 1246 *res = newstate;
864472e9
TM		 1247 return 0;
1248}
1249
1250static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1251{
864472e9 1252 struct nfs4_state *newstate;
864472e9
TM		 1253 int ret;
1254
1255 /* memory barrier prior to reading state->n_* */
2ced46c2 1256 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1257 smp_rmb();
1258 if (state->n_rdwr != 0) {
b0ed9dbc 1259 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1260 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1261 if (ret != 0)
1262 return ret;
2ced46c2
TM		 1263 if (newstate != state)
1264 return -ESTALE;
864472e9
TM		 1265 }
1266 if (state->n_wronly != 0) {
b0ed9dbc 1267 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1268 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1269 if (ret != 0)
1270 return ret;
2ced46c2
TM		 1271 if (newstate != state)
1272 return -ESTALE;
864472e9
TM		 1273 }
1274 if (state->n_rdonly != 0) {
b0ed9dbc 1275 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1276 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1277 if (ret != 0)
1278 return ret;
2ced46c2
TM		 1279 if (newstate != state)
1280 return -ESTALE;
864472e9 1281 }
1ac7e2fd
TM		 1282 /*
1283 * We may have performed cached opens for all three recoveries.
1284 * Check if we need to update the current stateid.
1285 */
1286 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1287 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1288 write_seqlock(&state->seqlock);
1ac7e2fd 1289 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1290 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1291 write_sequnlock(&state->seqlock);
1ac7e2fd 1292 }
864472e9
TM		 1293 return 0;
1294}
1295
1da177e4
LT		 1296/*
1297 * OPEN_RECLAIM:
1298 * reclaim state on the server after a reboot.
1da177e4 1299 */
539cd03a 1300static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1301{
1ac7e2fd 1302 struct nfs_delegation *delegation;
864472e9 1303 struct nfs4_opendata *opendata;
dc0b027d 1304 fmode_t delegation_type = 0;
1da177e4
LT		 1305 int status;
1306
4a1c0893
TM		 1307 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1308 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1309 if (IS_ERR(opendata))
1310 return PTR_ERR(opendata);
1ac7e2fd
TM		 1311 rcu_read_lock();
1312 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1313 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1314 delegation_type = delegation->type;
1ac7e2fd 1315 rcu_read_unlock();
864472e9
TM		 1316 opendata->o_arg.u.delegation_type = delegation_type;
1317 status = nfs4_open_recover(opendata, state);
c6d00e63 1318 nfs4_opendata_put(opendata);
1da177e4
LT		 1319 return status;
1320}
1321
539cd03a 1322static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1323{
1324 struct nfs_server *server = NFS_SERVER(state->inode);
1325 struct nfs4_exception exception = { };
1326 int err;
1327 do {
539cd03a 1328 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1329 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1330 break;
1331 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1332 } while (exception.retry);
1333 return err;
1334}
1335
864472e9
TM		 1336static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1337{
1338 struct nfs_open_context *ctx;
1339 int ret;
1340
1341 ctx = nfs4_state_find_open_context(state);
1342 if (IS_ERR(ctx))
1343 return PTR_ERR(ctx);
539cd03a 1344 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1345 put_nfs_open_context(ctx);
1346 return ret;
1347}
1348
13437e12 1349static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1350{
e56e0b78 1351 struct nfs4_opendata *opendata;
864472e9 1352 int ret;
1da177e4 1353
4a1c0893
TM		 1354 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1355 NFS4_OPEN_CLAIM_DELEGATE_CUR);
6f220ed5
TM		 1356 if (IS_ERR(opendata))
1357 return PTR_ERR(opendata);
f597c537 1358 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
864472e9 1359 ret = nfs4_open_recover(opendata, state);
c6d00e63 1360 nfs4_opendata_put(opendata);
864472e9 1361 return ret;
1da177e4
LT		 1362}
1363
13437e12 1364int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1365{
1366 struct nfs4_exception exception = { };
539cd03a 1367 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1368 int err;
1369 do {
13437e12 1370 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1371 switch (err) {
1372 case 0:
965b5d67
TM		 1373 case -ENOENT:
1374 case -ESTALE:
1375 goto out;
bcfa49f6
RL		 1376 case -NFS4ERR_BADSESSION:
1377 case -NFS4ERR_BADSLOT:
1378 case -NFS4ERR_BAD_HIGH_SLOT:
1379 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1380 case -NFS4ERR_DEADSESSION:
37380e42 1381 set_bit(NFS_DELEGATED_STATE, &state->flags);
9f594791 1382 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
37380e42 1383 err = -EAGAIN;
bcfa49f6 1384 goto out;
1da177e4
LT		 1385 case -NFS4ERR_STALE_CLIENTID:
1386 case -NFS4ERR_STALE_STATEID:
37380e42 1387 set_bit(NFS_DELEGATED_STATE, &state->flags);
1da177e4
LT		 1388 case -NFS4ERR_EXPIRED:
1389 /* Don't recall a delegation if it was lost */
0400a6b0 1390 nfs4_schedule_lease_recovery(server->nfs_client);
37380e42 1391 err = -EAGAIN;
965b5d67 1392 goto out;
a1d0b5ee 1393 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 1394 case -NFS4ERR_ADMIN_REVOKED:
1395 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 1396 nfs_inode_find_state_and_recover(state->inode,
1397 stateid);
0400a6b0 1398 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 1399 case -ENOMEM:
1400 err = 0;
1401 goto out;
1da177e4 1402 }
37380e42 1403 set_bit(NFS_DELEGATED_STATE, &state->flags);
1da177e4
LT		 1404 err = nfs4_handle_exception(server, err, &exception);
1405 } while (exception.retry);
965b5d67 1406out:
1da177e4
LT		 1407 return err;
1408}
1409
cdd4e68b
TM		 1410static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1411{
1412 struct nfs4_opendata *data = calldata;
1413
1414 data->rpc_status = task->tk_status;
26e976a8 1415 if (data->rpc_status == 0) {
f597c537 1416 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1417 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1418 renew_lease(data->o_res.server, data->timestamp);
3e309914 1419 data->rpc_done = 1;
26e976a8 1420 }
cdd4e68b
TM		 1421}
1422
1423static void nfs4_open_confirm_release(void *calldata)
1424{
1425 struct nfs4_opendata *data = calldata;
1426 struct nfs4_state *state = NULL;
1427
1428 /* If this request hasn't been cancelled, do nothing */
1429 if (data->cancelled == 0)
1430 goto out_free;
1431 /* In case of error, no cleanup! */
3e309914 1432 if (!data->rpc_done)
cdd4e68b 1433 goto out_free;
cdd4e68b 1434 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1435 if (!IS_ERR(state))
643168c2 1436 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1437out_free:
c6d00e63 1438 nfs4_opendata_put(data);
cdd4e68b
TM		 1439}
1440
1441static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1442 .rpc_call_done = nfs4_open_confirm_done,
1443 .rpc_release = nfs4_open_confirm_release,
1444};
1445
1446/*
1447 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1448 */
1449static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1450{
1451 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1452 struct rpc_task *task;
5138fde0
TM		 1453 struct rpc_message msg = {
1454 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1455 .rpc_argp = &data->c_arg,
1456 .rpc_resp = &data->c_res,
1457 .rpc_cred = data->owner->so_cred,
1458 };
c970aa85
TM		 1459 struct rpc_task_setup task_setup_data = {
1460 .rpc_client = server->client,
5138fde0 1461 .rpc_message = &msg,
c970aa85
TM		 1462 .callback_ops = &nfs4_open_confirm_ops,
1463 .callback_data = data,
101070ca 1464 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1465 .flags = RPC_TASK_ASYNC,
1466 };
1da177e4
LT		 1467 int status;
1468
c6d00e63 1469 kref_get(&data->kref);
3e309914
TM		 1470 data->rpc_done = 0;
1471 data->rpc_status = 0;
5138fde0 1472 data->timestamp = jiffies;
c970aa85 1473 task = rpc_run_task(&task_setup_data);
7a1218a2 1474 if (IS_ERR(task))
cdd4e68b 1475 return PTR_ERR(task);
cdd4e68b
TM		 1476 status = nfs4_wait_for_completion_rpc_task(task);
1477 if (status != 0) {
1478 data->cancelled = 1;
1479 smp_wmb();
1480 } else
1481 status = data->rpc_status;
e6b3c4db 1482 rpc_put_task(task);
1da177e4
LT		 1483 return status;
1484}
1485
24ac23ab 1486static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1487{
24ac23ab
TM		 1488 struct nfs4_opendata *data = calldata;
1489 struct nfs4_state_owner *sp = data->owner;
5138fde0 1490
24ac23ab 1491 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1492 goto out_wait;
aac00a8d
TM		 1493 /*
1494 * Check if we still need to send an OPEN call, or if we can use
1495 * a delegation instead.
1496 */
1497 if (data->state != NULL) {
1498 struct nfs_delegation *delegation;
1499
dc0b027d 1500 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1501 goto out_no_action;
aac00a8d
TM		 1502 rcu_read_lock();
1503 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1504 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1505 can_open_delegated(delegation, data->o_arg.fmode))
1506 goto unlock_no_action;
aac00a8d
TM		 1507 rcu_read_unlock();
1508 }
95b72eb0 1509 /* Update client id. */
1f0e890d 1510 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1511 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1512 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
e23008ec 1513 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
6f220ed5
TM		 1514 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1515 }
26e976a8 1516 data->timestamp = jiffies;
035168ab 1517 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1518 &data->o_arg.seq_args,
2240a9e2
TM		 1519 &data->o_res.seq_res,
1520 task) != 0)
1521 nfs_release_seqid(data->o_arg.seqid);
6ee41268 1522 return;
652f89f6
TM		 1523unlock_no_action:
1524 rcu_read_unlock();
6ee41268
TM		 1525out_no_action:
1526 task->tk_action = NULL;
c8da19b9 1527out_wait:
b75ad4cd 1528 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1529}
1530
24ac23ab
TM		 1531static void nfs4_open_done(struct rpc_task *task, void *calldata)
1532{
1533 struct nfs4_opendata *data = calldata;
1da177e4 1534
24ac23ab 1535 data->rpc_status = task->tk_status;
d898528c 1536
14516c3a
TM		 1537 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1538 return;
d898528c 1539
24ac23ab 1540 if (task->tk_status == 0) {
807d66d8
TM		 1541 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1542 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1543 case S_IFREG:
1544 break;
1545 case S_IFLNK:
24ac23ab 1546 data->rpc_status = -ELOOP;
6f926b5b
TM		 1547 break;
1548 case S_IFDIR:
24ac23ab 1549 data->rpc_status = -EISDIR;
6f926b5b
TM		 1550 break;
1551 default:
24ac23ab 1552 data->rpc_status = -ENOTDIR;
807d66d8 1553 }
6f926b5b 1554 }
26e976a8 1555 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1556 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1557 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1558 }
3e309914 1559 data->rpc_done = 1;
24ac23ab 1560}
6f926b5b 1561
24ac23ab
TM		 1562static void nfs4_open_release(void *calldata)
1563{
1564 struct nfs4_opendata *data = calldata;
1565 struct nfs4_state *state = NULL;
1566
1567 /* If this request hasn't been cancelled, do nothing */
1568 if (data->cancelled == 0)
1569 goto out_free;
1570 /* In case of error, no cleanup! */
3e309914 1571 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1572 goto out_free;
1573 /* In case we need an open_confirm, no cleanup! */
1574 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1575 goto out_free;
24ac23ab 1576 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1577 if (!IS_ERR(state))
643168c2 1578 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1579out_free:
c6d00e63 1580 nfs4_opendata_put(data);
24ac23ab
TM		 1581}
1582
1583static const struct rpc_call_ops nfs4_open_ops = {
1584 .rpc_call_prepare = nfs4_open_prepare,
1585 .rpc_call_done = nfs4_open_done,
1586 .rpc_release = nfs4_open_release,
1587};
1588
b257957e 1589static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1590{
1591 struct inode *dir = data->dir->d_inode;
1592 struct nfs_server *server = NFS_SERVER(dir);
1593 struct nfs_openargs *o_arg = &data->o_arg;
1594 struct nfs_openres *o_res = &data->o_res;
1595 struct rpc_task *task;
5138fde0
TM		 1596 struct rpc_message msg = {
1597 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1598 .rpc_argp = o_arg,
1599 .rpc_resp = o_res,
1600 .rpc_cred = data->owner->so_cred,
1601 };
c970aa85
TM		 1602 struct rpc_task_setup task_setup_data = {
1603 .rpc_client = server->client,
5138fde0 1604 .rpc_message = &msg,
c970aa85
TM		 1605 .callback_ops = &nfs4_open_ops,
1606 .callback_data = data,
101070ca 1607 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1608 .flags = RPC_TASK_ASYNC,
1609 };
24ac23ab
TM		 1610 int status;
1611
9d12b216 1612 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1613 kref_get(&data->kref);
3e309914
TM		 1614 data->rpc_done = 0;
1615 data->rpc_status = 0;
2ced46c2 1616 data->cancelled = 0;
b257957e 1617 if (isrecover)
8fe72bac 1618 nfs4_set_sequence_privileged(&o_arg->seq_args);
c970aa85 1619 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1620 if (IS_ERR(task))
1621 return PTR_ERR(task);
1622 status = nfs4_wait_for_completion_rpc_task(task);
1623 if (status != 0) {
1624 data->cancelled = 1;
1625 smp_wmb();
1626 } else
1627 status = data->rpc_status;
1628 rpc_put_task(task);
1629
1630 return status;
1631}
1632
1633static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1634{
1635 struct inode *dir = data->dir->d_inode;
1636 struct nfs_openres *o_res = &data->o_res;
1637 int status;
1638
1639 status = nfs4_run_open_task(data, 1);
1640 if (status != 0 || !data->rpc_done)
1641 return status;
1642
6926afd1
TM		 1643 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1644
b257957e
AB		 1645 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1646 status = _nfs4_proc_open_confirm(data);
1647 if (status != 0)
1648 return status;
1649 }
1650
1651 return status;
1652}
1653
6168f62c
WAA		 1654static int nfs4_opendata_access(struct rpc_cred *cred,
1655 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1656 struct nfs4_state *state, fmode_t fmode,
1657 int openflags)
6168f62c
WAA		 1658{
1659 struct nfs_access_entry cache;
1660 u32 mask;
1661
1662 /* access call failed or for some reason the server doesn't
1663 * support any access modes -- defer access call until later */
1664 if (opendata->o_res.access_supported == 0)
1665 return 0;
1666
1667 mask = 0;
bbd3a8ee 1668 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1669 * write mode bits, but POSIX allows the creating process to write.
1670 * use openflags to check for exec, because fmode won't
1671 * always have FMODE_EXEC set when file open for exec. */
1672 if (openflags & __FMODE_EXEC) {
1673 /* ONLY check for exec rights */
1674 mask = MAY_EXEC;
1675 } else if (fmode & FMODE_READ)
1676 mask = MAY_READ;
6168f62c
WAA		 1677
1678 cache.cred = cred;
1679 cache.jiffies = jiffies;
1680 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1681 nfs_access_add_cache(state->inode, &cache);
1682
bbd3a8ee 1683 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1684 return 0;
1685
1686 /* even though OPEN succeeded, access is denied. Close the file */
1687 nfs4_close_state(state, fmode);
998f40b5 1688 return -EACCES;
6168f62c
WAA		 1689}
1690
b257957e
AB		 1691/*
1692 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1693 */
1694static int _nfs4_proc_open(struct nfs4_opendata *data)
1695{
1696 struct inode *dir = data->dir->d_inode;
1697 struct nfs_server *server = NFS_SERVER(dir);
1698 struct nfs_openargs *o_arg = &data->o_arg;
1699 struct nfs_openres *o_res = &data->o_res;
1700 int status;
1701
1702 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1703 if (!data->rpc_done)
1704 return status;
1705 if (status != 0) {
1706 if (status == -NFS4ERR_BADNAME &&
1707 !(o_arg->open_flags & O_CREAT))
1708 return -ENOENT;
24ac23ab 1709 return status;
08ef7bd3 1710 }
24ac23ab 1711
6926afd1
TM		 1712 nfs_fattr_map_and_free_names(server, &data->f_attr);
1713
90ff0c54 1714 if (o_arg->open_flags & O_CREAT)
56ae19f3 1715 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1716 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1717 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1718 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1719 status = _nfs4_proc_open_confirm(data);
1da177e4 1720 if (status != 0)
24ac23ab 1721 return status;
1da177e4
LT		 1722 }
1723 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1724 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1725 return 0;
1da177e4
LT		 1726}
1727
d83217c1
AA		 1728static int nfs4_recover_expired_lease(struct nfs_server *server)
1729{
1730 return nfs4_client_recover_expired_lease(server->nfs_client);
1731}
1732
1da177e4
LT		 1733/*
1734 * OPEN_EXPIRED:
1735 * reclaim state on the server after a network partition.
1736 * Assumes caller holds the appropriate lock
1737 */
539cd03a 1738static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1739{
e56e0b78 1740 struct nfs4_opendata *opendata;
864472e9 1741 int ret;
1da177e4 1742
4a1c0893
TM		 1743 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1744 NFS4_OPEN_CLAIM_NULL);
6f220ed5
TM		 1745 if (IS_ERR(opendata))
1746 return PTR_ERR(opendata);
864472e9 1747 ret = nfs4_open_recover(opendata, state);
35d05778 1748 if (ret == -ESTALE)
3d4ff43d 1749 d_drop(ctx->dentry);
c6d00e63 1750 nfs4_opendata_put(opendata);
864472e9 1751 return ret;
1da177e4
LT		 1752}
1753
a9ed2e25 1754static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1755{
539cd03a 1756 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1757 struct nfs4_exception exception = { };
1758 int err;
1759
1760 do {
539cd03a 1761 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1762 switch (err) {
1763 default:
1764 goto out;
1765 case -NFS4ERR_GRACE:
1766 case -NFS4ERR_DELAY:
1767 nfs4_handle_exception(server, err, &exception);
1768 err = 0;
1769 }
202b50dc 1770 } while (exception.retry);
a9ed2e25 1771out:
202b50dc
TM		 1772 return err;
1773}
1774
1da177e4
LT		 1775static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1776{
1da177e4 1777 struct nfs_open_context *ctx;
864472e9 1778 int ret;
1da177e4 1779
864472e9
TM		 1780 ctx = nfs4_state_find_open_context(state);
1781 if (IS_ERR(ctx))
1782 return PTR_ERR(ctx);
539cd03a 1783 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1784 put_nfs_open_context(ctx);
1785 return ret;
1da177e4
LT		 1786}
1787
f062eb6c 1788#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1789static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1790{
f062eb6c 1791 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1792 nfs4_stateid *stateid = &state->stateid;
1793 int status;
1794
1795 /* If a state reset has been done, test_stateid is unneeded */
1796 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1797 return;
1798
1799 status = nfs41_test_stateid(server, stateid);
1800 if (status != NFS_OK) {
1801 /* Free the stateid unless the server explicitly
1802 * informs us the stateid is unrecognized. */
1803 if (status != -NFS4ERR_BAD_STATEID)
1804 nfs41_free_stateid(server, stateid);
6938867e 1805 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1806
6938867e
BS		 1807 write_seqlock(&state->seqlock);
1808 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1809 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1810 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1811 }
1812}
1813
1814/**
1815 * nfs41_check_open_stateid - possibly free an open stateid
1816 *
1817 * @state: NFSv4 state for an inode
1818 *
1819 * Returns NFS_OK if recovery for this stateid is now finished.
1820 * Otherwise a negative NFS4ERR value is returned.
1821 */
1822static int nfs41_check_open_stateid(struct nfs4_state *state)
1823{
1824 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1825 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1826 int status;
1827
1828 /* If a state reset has been done, test_stateid is unneeded */
1829 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1830 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1831 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1832 return -NFS4ERR_BAD_STATEID;
1833
1834 status = nfs41_test_stateid(server, stateid);
1835 if (status != NFS_OK) {
1836 /* Free the stateid unless the server explicitly
1837 * informs us the stateid is unrecognized. */
1838 if (status != -NFS4ERR_BAD_STATEID)
1839 nfs41_free_stateid(server, stateid);
1840
1841 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1842 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1843 clear_bit(NFS_O_RDWR_STATE, &state->flags);
b01dd1d8
BS		 1844 }
1845 return status;
1846}
1847
1848static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1849{
eb64cf96 1850 int status;
b01dd1d8 1851
3e60ffdd
CL		 1852 nfs41_clear_delegation_stateid(state);
1853 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1854 if (status != NFS_OK)
1855 status = nfs4_open_expired(sp, state);
1856 return status;
f062eb6c
BS		 1857}
1858#endif
1859
aa53ed54
JL		 1860/*
1861 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1862 * fields corresponding to attributes that were used to store the verifier.
1863 * Make sure we clobber those fields in the later setattr call
1864 */
1865static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1866{
1867 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1868 !(sattr->ia_valid & ATTR_ATIME_SET))
1869 sattr->ia_valid |= ATTR_ATIME;
1870
1871 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1872 !(sattr->ia_valid & ATTR_MTIME_SET))
1873 sattr->ia_valid |= ATTR_MTIME;
1874}
1875
c21443c2
TM		 1876static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
1877 fmode_t fmode,
1878 int flags,
1879 struct nfs4_state **res)
1880{
1881 struct nfs4_state_owner *sp = opendata->owner;
1882 struct nfs_server *server = sp->so_server;
1883 struct nfs4_state *state;
1884 unsigned int seq;
1885 int ret;
1886
1887 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
1888
1889 ret = _nfs4_proc_open(opendata);
1890 if (ret != 0)
1891 goto out;
1892
1893 state = nfs4_opendata_to_nfs4_state(opendata);
1894 ret = PTR_ERR(state);
1895 if (IS_ERR(state))
1896 goto out;
1897 if (server->caps & NFS_CAP_POSIX_LOCK)
1898 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
1899
1900 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
1901 if (ret != 0)
1902 goto out;
1903
1904 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
1905 nfs4_schedule_stateid_recovery(server, state);
1906 nfs4_wait_clnt_recover(server->nfs_client);
1907 }
1908 *res = state;
1909out:
1910 return ret;
1911}
1912
1da177e4 1913/*
24ac23ab 1914 * Returns a referenced nfs4_state
1da177e4 1915 */
82be417a
AA		 1916static int _nfs4_do_open(struct inode *dir,
1917 struct dentry *dentry,
1918 fmode_t fmode,
1919 int flags,
1920 struct iattr *sattr,
1921 struct rpc_cred *cred,
1922 struct nfs4_state **res,
1923 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1924{
1925 struct nfs4_state_owner *sp;
1926 struct nfs4_state *state = NULL;
1927 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1928 struct nfs4_opendata *opendata;
aac00a8d 1929 int status;
1da177e4
LT		 1930
1931 /* Protect against reboot recovery conflicts */
1da177e4 1932 status = -ENOMEM;
d1e284d5
TM		 1933 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1934 if (sp == NULL) {
1da177e4
LT		 1935 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1936 goto out_err;
1937 }
58d9714a
TM		 1938 status = nfs4_recover_expired_lease(server);
1939 if (status != 0)
b4454fe1 1940 goto err_put_state_owner;
82a2c1b7
AV		 1941 if (dentry->d_inode != NULL)
1942 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1943 status = -ENOMEM;
4a1c0893
TM		 1944 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1945 NFS4_OPEN_CLAIM_NULL,
1946 GFP_KERNEL);
e56e0b78 1947 if (opendata == NULL)
95d35cb4 1948 goto err_put_state_owner;
1da177e4 1949
82be417a
AA		 1950 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1951 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1952 if (!opendata->f_attr.mdsthreshold)
1953 goto err_opendata_put;
1549210f 1954 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 1955 }
82a2c1b7
AV		 1956 if (dentry->d_inode != NULL)
1957 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1958
c21443c2 1959 status = _nfs4_open_and_get_state(opendata, fmode, flags, &state);
6168f62c
WAA		 1960 if (status != 0)
1961 goto err_opendata_put;
1962
0ab64e0e
TM		 1963 if (opendata->o_arg.open_flags & O_EXCL) {
1964 nfs4_exclusive_attrset(opendata, sattr);
1965
1966 nfs_fattr_init(opendata->o_res.f_attr);
1967 status = nfs4_do_setattr(state->inode, cred,
1968 opendata->o_res.f_attr, sattr,
1969 state);
1970 if (status == 0)
1971 nfs_setattr_update_inode(state->inode, sattr);
1972 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1973 }
82be417a
AA		 1974
1975 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1976 *ctx_th = opendata->f_attr.mdsthreshold;
1977 else
1978 kfree(opendata->f_attr.mdsthreshold);
1979 opendata->f_attr.mdsthreshold = NULL;
1980
c6d00e63 1981 nfs4_opendata_put(opendata);
1da177e4 1982 nfs4_put_state_owner(sp);
1da177e4
LT		 1983 *res = state;
1984 return 0;
c6d00e63 1985err_opendata_put:
82be417a 1986 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 1987 nfs4_opendata_put(opendata);
e56e0b78
TM		 1988err_put_state_owner:
1989 nfs4_put_state_owner(sp);
1da177e4 1990out_err:
1da177e4
LT		 1991 *res = NULL;
1992 return status;
1993}
1994
1995
82be417a
AA		 1996static struct nfs4_state *nfs4_do_open(struct inode *dir,
1997 struct dentry *dentry,
1998 fmode_t fmode,
1999 int flags,
2000 struct iattr *sattr,
2001 struct rpc_cred *cred,
2002 struct nfs4_threshold **ctx_th)
1da177e4
LT		 2003{
2004 struct nfs4_exception exception = { };
2005 struct nfs4_state *res;
2006 int status;
2007
6168f62c 2008 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 2009 do {
82be417a
AA		 2010 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
2011 &res, ctx_th);
1da177e4
LT		 2012 if (status == 0)
2013 break;
2014 /* NOTE: BAD_SEQID means the server and client disagree about the
2015 * book-keeping w.r.t. state-changing operations
2016 * (OPEN/CLOSE/LOCK/LOCKU...)
2017 * It is actually a sign of a bug on the client or on the server.
2018 *
2019 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2020 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2021 * have unhashed the old state_owner for us, and that we can
2022 * therefore safely retry using a new one. We should still warn
2023 * the user though...
2024 */
2025 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2026 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2027 " returned a bad sequence-id error!\n",
2028 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2029 exception.retry = 1;
2030 continue;
2031 }
550f5747
TM		 2032 /*
2033 * BAD_STATEID on OPEN means that the server cancelled our
2034 * state before it received the OPEN_CONFIRM.
2035 * Recover by retrying the request as per the discussion
2036 * on Page 181 of RFC3530.
2037 */
2038 if (status == -NFS4ERR_BAD_STATEID) {
2039 exception.retry = 1;
2040 continue;
2041 }
aac00a8d
TM		 2042 if (status == -EAGAIN) {
2043 /* We must have found a delegation */
2044 exception.retry = 1;
2045 continue;
2046 }
1da177e4
LT		 2047 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
2048 status, &exception));
2049 } while (exception.retry);
2050 return res;
2051}
2052
659bfcd6
TM		 2053static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2054 struct nfs_fattr *fattr, struct iattr *sattr,
2055 struct nfs4_state *state)
1da177e4 2056{
3e4f6290 2057 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2058 struct nfs_setattrargs arg = {
3e4f6290 2059 .fh = NFS_FH(inode),
1da177e4
LT		 2060 .iap = sattr,
2061 .server = server,
2062 .bitmask = server->attr_bitmask,
2063 };
2064 struct nfs_setattrres res = {
2065 .fattr = fattr,
2066 .server = server,
2067 };
2068 struct rpc_message msg = {
659bfcd6
TM		 2069 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2070 .rpc_argp = &arg,
2071 .rpc_resp = &res,
2072 .rpc_cred = cred,
1da177e4 2073 };
26e976a8 2074 unsigned long timestamp = jiffies;
65e4308d 2075 int status;
1da177e4 2076
0e574af1 2077 nfs_fattr_init(fattr);
1da177e4 2078
5d422301 2079 if (state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2080 struct nfs_lockowner lockowner = {
2081 .l_owner = current->files,
2082 .l_pid = current->tgid,
2083 };
4fc8796d 2084 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2085 &lockowner);
4fc8796d
TM		 2086 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2087 FMODE_WRITE)) {
3e4f6290 2088 /* Use that stateid */
08e9eac4 2089 } else
f597c537 2090 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2091
7c513058 2092 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2093 if (status == 0 && state != NULL)
2094 renew_lease(server, timestamp);
65e4308d 2095 return status;
1da177e4
LT		 2096}
2097
659bfcd6
TM		 2098static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2099 struct nfs_fattr *fattr, struct iattr *sattr,
2100 struct nfs4_state *state)
1da177e4 2101{
3e4f6290 2102 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2103 struct nfs4_exception exception = {
2104 .state = state,
3114ea7a 2105 .inode = inode,
a1d0b5ee 2106 };
1da177e4
LT		 2107 int err;
2108 do {
451146be
TM		 2109 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2110 switch (err) {
2111 case -NFS4ERR_OPENMODE:
2112 if (state && !(state->state & FMODE_WRITE)) {
2113 err = -EBADF;
2114 if (sattr->ia_valid & ATTR_OPEN)
2115 err = -EACCES;
2116 goto out;
2117 }
2118 }
2119 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2120 } while (exception.retry);
451146be 2121out:
1da177e4
LT		 2122 return err;
2123}
2124
2125struct nfs4_closedata {
2126 struct inode *inode;
2127 struct nfs4_state *state;
2128 struct nfs_closeargs arg;
2129 struct nfs_closeres res;
516a6af6 2130 struct nfs_fattr fattr;
26e976a8 2131 unsigned long timestamp;
f7e8917a
FI		 2132 bool roc;
2133 u32 roc_barrier;
1da177e4
LT		 2134};
2135
963d8fe5 2136static void nfs4_free_closedata(void *data)
9512135d 2137{
963d8fe5
TM		 2138 struct nfs4_closedata *calldata = data;
2139 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2140 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2141
f7e8917a
FI		 2142 if (calldata->roc)
2143 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2144 nfs4_put_open_state(calldata->state);
2145 nfs_free_seqid(calldata->arg.seqid);
9512135d 2146 nfs4_put_state_owner(sp);
322b2b90 2147 nfs_sb_deactive(sb);
9512135d
TM		 2148 kfree(calldata);
2149}
2150
88069f77
TM		 2151static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2152 fmode_t fmode)
2153{
2154 spin_lock(&state->owner->so_lock);
2155 if (!(fmode & FMODE_READ))
2156 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2157 if (!(fmode & FMODE_WRITE))
2158 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2159 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2160 spin_unlock(&state->owner->so_lock);
2161}
2162
963d8fe5 2163static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2164{
963d8fe5 2165 struct nfs4_closedata *calldata = data;
1da177e4 2166 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2167 struct nfs_server *server = NFS_SERVER(calldata->inode);
2168
a3ca5651 2169 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2170 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2171 return;
1da177e4
LT		 2172 /* hmm. we are done with the inode, and in the process of freeing
2173 * the state_owner. we keep this around to process errors
2174 */
1da177e4
LT		 2175 switch (task->tk_status) {
2176 case 0:
f7e8917a
FI		 2177 if (calldata->roc)
2178 pnfs_roc_set_barrier(state->inode,
2179 calldata->roc_barrier);
45328c35 2180 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2181 renew_lease(server, calldata->timestamp);
88069f77
TM		 2182 nfs4_close_clear_stateid_flags(state,
2183 calldata->arg.fmode);
1da177e4
LT		 2184 break;
2185 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2186 case -NFS4ERR_OLD_STATEID:
2187 case -NFS4ERR_BAD_STATEID:
1da177e4 2188 case -NFS4ERR_EXPIRED:
dc0b027d 2189 if (calldata->arg.fmode == 0)
9e33bed5 2190 break;
1da177e4 2191 default:
72211dbe
TM		 2192 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2193 rpc_restart_call_prepare(task);
1da177e4 2194 }
72211dbe 2195 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2196 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2197 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2198}
2199
4ce70ada 2200static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2201{
4ce70ada 2202 struct nfs4_closedata *calldata = data;
9512135d 2203 struct nfs4_state *state = calldata->state;
7fdab069 2204 struct inode *inode = calldata->inode;
88069f77 2205 int call_close = 0;
9512135d 2206
a3ca5651 2207 dprintk("%s: begin!\n", __func__);
963d8fe5 2208 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2209 goto out_wait;
003707c7 2210
88069f77
TM		 2211 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2212 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2213 spin_lock(&state->owner->so_lock);
003707c7 2214 /* Calculate the change in open mode */
e7616923 2215 if (state->n_rdwr == 0) {
003707c7 2216 if (state->n_rdonly == 0) {
88069f77
TM		 2217 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2218 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2219 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2220 }
2221 if (state->n_wronly == 0) {
88069f77
TM		 2222 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2223 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2224 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2225 }
e7616923 2226 }
5d422301
TM		 2227 if (!nfs4_valid_open_stateid(state))
2228 call_close = 0;
4cecb76f 2229 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2230
2231 if (!call_close) {
963d8fe5 2232 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2233 goto out_no_action;
9512135d 2234 }
88069f77 2235
f7e8917a 2236 if (calldata->arg.fmode == 0) {
88069f77 2237 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2238 if (calldata->roc &&
7fdab069 2239 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
c8da19b9 2240 goto out_wait;
f7e8917a 2241 }
88069f77 2242
516a6af6 2243 nfs_fattr_init(calldata->res.fattr);
26e976a8 2244 calldata->timestamp = jiffies;
7fdab069 2245 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2246 &calldata->arg.seq_args,
2247 &calldata->res.seq_res,
2240a9e2
TM		 2248 task) != 0)
2249 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2250 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2251 return;
2252out_no_action:
2253 task->tk_action = NULL;
2254out_wait:
2255 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2256}
2257
963d8fe5 2258static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2259 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2260 .rpc_call_done = nfs4_close_done,
2261 .rpc_release = nfs4_free_closedata,
2262};
2263
1da177e4
LT		 2264/*
2265 * It is possible for data to be read/written from a mem-mapped file
2266 * after the sys_close call (which hits the vfs layer as a flush).
2267 * This means that we can't safely call nfsv4 close on a file until
2268 * the inode is cleared. This in turn means that we are not good
2269 * NFSv4 citizens - we do not indicate to the server to update the file's
2270 * share state even when we are done with one of the three share
2271 * stateid's in the inode.
2272 *
2273 * NOTE: Caller must be holding the sp->so_owner semaphore!
2274 */
1f7977c1 2275int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2276{
4a35bd41 2277 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2278 struct nfs4_closedata *calldata;
b39e625b
TM		 2279 struct nfs4_state_owner *sp = state->owner;
2280 struct rpc_task *task;
5138fde0
TM		 2281 struct rpc_message msg = {
2282 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2283 .rpc_cred = state->owner->so_cred,
2284 };
c970aa85
TM		 2285 struct rpc_task_setup task_setup_data = {
2286 .rpc_client = server->client,
5138fde0 2287 .rpc_message = &msg,
c970aa85 2288 .callback_ops = &nfs4_close_ops,
101070ca 2289 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2290 .flags = RPC_TASK_ASYNC,
2291 };
9512135d 2292 int status = -ENOMEM;
1da177e4 2293
8535b2be 2294 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2295 if (calldata == NULL)
9512135d 2296 goto out;
9d12b216 2297 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2298 calldata->inode = state->inode;
1da177e4 2299 calldata->state = state;
4a35bd41 2300 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2301 calldata->arg.stateid = &state->open_stateid;
1da177e4 2302 /* Serialization for the sequence id */
8535b2be 2303 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2304 if (calldata->arg.seqid == NULL)
2305 goto out_free_calldata;
dc0b027d 2306 calldata->arg.fmode = 0;
a65318bf 2307 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2308 calldata->res.fattr = &calldata->fattr;
c1d51931 2309 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2310 calldata->res.server = server;
1f7977c1 2311 calldata->roc = pnfs_roc(state->inode);
643168c2 2312 nfs_sb_active(calldata->inode->i_sb);
9512135d 2313
1174dd1f
TM		 2314 msg.rpc_argp = &calldata->arg;
2315 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2316 task_setup_data.callback_data = calldata;
2317 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2318 if (IS_ERR(task))
2319 return PTR_ERR(task);
a49c3c77
TM		 2320 status = 0;
2321 if (wait)
2322 status = rpc_wait_for_completion_task(task);
b39e625b 2323 rpc_put_task(task);
a49c3c77 2324 return status;
9512135d
TM		 2325out_free_calldata:
2326 kfree(calldata);
2327out:
b39e625b
TM		 2328 nfs4_put_open_state(state);
2329 nfs4_put_state_owner(sp);
9512135d 2330 return status;
1da177e4
LT		 2331}
2332
2b484297 2333static struct inode *
cd9a1c0e 2334nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2335{
1da177e4 2336 struct nfs4_state *state;
1da177e4 2337
565277f6 2338 /* Protect against concurrent sillydeletes */
82be417a
AA		 2339 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2340 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2341 if (IS_ERR(state))
2342 return ERR_CAST(state);
cd9a1c0e 2343 ctx->state = state;
f46e0bd3 2344 return igrab(state->inode);
1da177e4
LT		 2345}
2346
1185a552 2347static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2348{
2349 if (ctx->state == NULL)
2350 return;
2351 if (is_sync)
643168c2 2352 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2353 else
643168c2 2354 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2355}
1da177e4
LT		 2356
2357static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2358{
43652ad5
BH		 2359 struct nfs4_server_caps_arg args = {
2360 .fhandle = fhandle,
2361 };
1da177e4
LT		 2362 struct nfs4_server_caps_res res = {};
2363 struct rpc_message msg = {
2364 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2365 .rpc_argp = &args,
1da177e4
LT		 2366 .rpc_resp = &res,
2367 };
2368 int status;
2369
7c513058 2370 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2371 if (status == 0) {
2372 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2373 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2374 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2375 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2376 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2377 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2378 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2379 server->caps |= NFS_CAP_ACLS;
2380 if (res.has_links != 0)
2381 server->caps |= NFS_CAP_HARDLINKS;
2382 if (res.has_symlinks != 0)
2383 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2384 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2385 server->caps |= NFS_CAP_FILEID;
2386 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2387 server->caps |= NFS_CAP_MODE;
2388 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2389 server->caps |= NFS_CAP_NLINK;
2390 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2391 server->caps |= NFS_CAP_OWNER;
2392 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2393 server->caps |= NFS_CAP_OWNER_GROUP;
2394 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2395 server->caps |= NFS_CAP_ATIME;
2396 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2397 server->caps |= NFS_CAP_CTIME;
2398 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2399 server->caps |= NFS_CAP_MTIME;
2400
a65318bf
TM		 2401 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2402 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2403 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2404 server->acl_bitmask = res.acl_bitmask;
264e6351 2405 server->fh_expire_type = res.fh_expire_type;
1da177e4 2406 }
cccef3b9 2407
1da177e4
LT		 2408 return status;
2409}
2410
55a97593 2411int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2412{
2413 struct nfs4_exception exception = { };
2414 int err;
2415 do {
2416 err = nfs4_handle_exception(server,
2417 _nfs4_server_capabilities(server, fhandle),
2418 &exception);
2419 } while (exception.retry);
2420 return err;
2421}
2422
2423static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2424 struct nfs_fsinfo *info)
2425{
1da177e4
LT		 2426 struct nfs4_lookup_root_arg args = {
2427 .bitmask = nfs4_fattr_bitmap,
2428 };
2429 struct nfs4_lookup_res res = {
2430 .server = server,
0e574af1 2431 .fattr = info->fattr,
1da177e4
LT		 2432 .fh = fhandle,
2433 };
2434 struct rpc_message msg = {
2435 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2436 .rpc_argp = &args,
2437 .rpc_resp = &res,
2438 };
008f55d0 2439
0e574af1 2440 nfs_fattr_init(info->fattr);
7c513058 2441 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2442}
2443
2444static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2445 struct nfs_fsinfo *info)
2446{
2447 struct nfs4_exception exception = { };
2448 int err;
2449 do {
fb8a5ba8
BS		 2450 err = _nfs4_lookup_root(server, fhandle, info);
2451 switch (err) {
2452 case 0:
2453 case -NFS4ERR_WRONGSEC:
05e9cfb4 2454 goto out;
fb8a5ba8
BS		 2455 default:
2456 err = nfs4_handle_exception(server, err, &exception);
2457 }
1da177e4 2458 } while (exception.retry);
05e9cfb4 2459out:
1da177e4
LT		 2460 return err;
2461}
2462
8f70e95f
BS		 2463static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2464 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2465{
2466 struct rpc_auth *auth;
2467 int ret;
2468
2469 auth = rpcauth_create(flavor, server->client);
e8d920c5 2470 if (IS_ERR(auth)) {
8f70e95f
BS		 2471 ret = -EIO;
2472 goto out;
2473 }
2474 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2475out:
2476 return ret;
2477}
2478
801a16dc 2479static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2480 struct nfs_fsinfo *info)
1da177e4 2481{
8f70e95f 2482 int i, len, status = 0;
0fabee24 2483 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2484
6a1a1e34 2485 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
4ea8fed5
TM		 2486 if (len < 0)
2487 return len;
8f70e95f
BS		 2488
2489 for (i = 0; i < len; i++) {
6a1a1e34
CL		 2490 /* AUTH_UNIX is the default flavor if none was specified,
2491 * thus has already been tried. */
2492 if (flav_array[i] == RPC_AUTH_UNIX)
2493 continue;
2494
8f70e95f 2495 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2496 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2497 continue;
2498 break;
8f70e95f 2499 }
fb8a5ba8
BS		 2500 /*
2501 * -EACCESS could mean that the user doesn't have correct permissions
2502 * to access the mount. It could also mean that we tried to mount
2503 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2504 * existing mount programs don't handle -EACCES very well so it should
2505 * be mapped to -EPERM instead.
2506 */
2507 if (status == -EACCES)
2508 status = -EPERM;
801a16dc
BS		 2509 return status;
2510}
2511
2512/*
2513 * get the file handle for the "/" directory on the server
2514 */
3028eb2b
BS		 2515int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2516 struct nfs_fsinfo *info)
801a16dc 2517{
fca78d6d 2518 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2519 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2520 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2521 /*
2522 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2523 * by nfs4_map_errors() as this function exits.
2524 */
fca78d6d 2525 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2526 if (status == 0)
2527 status = nfs4_server_capabilities(server, fhandle);
2528 if (status == 0)
2529 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2530 return nfs4_map_errors(status);
1da177e4
LT		 2531}
2532
bae36241
BS		 2533static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2534 struct nfs_fsinfo *info)
2535{
2536 int error;
2537 struct nfs_fattr *fattr = info->fattr;
2538
2539 error = nfs4_server_capabilities(server, mntfh);
2540 if (error < 0) {
2541 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2542 return error;
2543 }
2544
2545 error = nfs4_proc_getattr(server, mntfh, fattr);
2546 if (error < 0) {
2547 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2548 return error;
2549 }
2550
2551 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2552 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2553 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2554
2555 return error;
2556}
2557
6b97fd3d
MN		 2558/*
2559 * Get locations and (maybe) other attributes of a referral.
2560 * Note that we'll actually follow the referral later when
2561 * we detect fsid mismatch in inode revalidation
2562 */
f05d147f
BS		 2563static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2564 const struct qstr *name, struct nfs_fattr *fattr,
2565 struct nfs_fh *fhandle)
6b97fd3d
MN		 2566{
2567 int status = -ENOMEM;
2568 struct page *page = NULL;
2569 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2570
2571 page = alloc_page(GFP_KERNEL);
2572 if (page == NULL)
2573 goto out;
2574 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2575 if (locations == NULL)
2576 goto out;
2577
f05d147f 2578 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2579 if (status != 0)
2580 goto out;
2581 /* Make sure server returned a different fsid for the referral */
2582 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2583 dprintk("%s: server did not return a different fsid for"
2584 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2585 status = -EIO;
2586 goto out;
2587 }
533eb461
AA		 2588 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2589 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2590
533eb461 2591 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2592 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2593 memset(fhandle, 0, sizeof(struct nfs_fh));
2594out:
2595 if (page)
2596 __free_page(page);
5d7ca35a 2597 kfree(locations);
6b97fd3d
MN		 2598 return status;
2599}
2600
1da177e4
LT		 2601static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2602{
2603 struct nfs4_getattr_arg args = {
2604 .fh = fhandle,
2605 .bitmask = server->attr_bitmask,
2606 };
2607 struct nfs4_getattr_res res = {
2608 .fattr = fattr,
2609 .server = server,
2610 };
2611 struct rpc_message msg = {
2612 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2613 .rpc_argp = &args,
2614 .rpc_resp = &res,
2615 };
2616
0e574af1 2617 nfs_fattr_init(fattr);
7c513058 2618 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2619}
2620
2621static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2622{
2623 struct nfs4_exception exception = { };
2624 int err;
2625 do {
2626 err = nfs4_handle_exception(server,
2627 _nfs4_proc_getattr(server, fhandle, fattr),
2628 &exception);
2629 } while (exception.retry);
2630 return err;
2631}
2632
2633/*
2634 * The file is not closed if it is opened due to the a request to change
2635 * the size of the file. The open call will not be needed once the
2636 * VFS layer lookup-intents are implemented.
2637 *
2638 * Close is called when the inode is destroyed.
2639 * If we haven't opened the file for O_WRONLY, we
2640 * need to in the size_change case to obtain a stateid.
2641 *
2642 * Got race?
2643 * Because OPEN is always done by name in nfsv4, it is
2644 * possible that we opened a different file by the same
2645 * name. We can recognize this race condition, but we
2646 * can't do anything about it besides returning an error.
2647 *
2648 * This will be fixed with VFS changes (lookup-intent).
2649 */
2650static int
2651nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2652 struct iattr *sattr)
2653{
08e9eac4 2654 struct inode *inode = dentry->d_inode;
659bfcd6 2655 struct rpc_cred *cred = NULL;
d530838b 2656 struct nfs4_state *state = NULL;
1da177e4
LT		 2657 int status;
2658
8a1636c4 2659 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 2660 pnfs_commit_and_return_layout(inode);
8a1636c4 2661
0e574af1 2662 nfs_fattr_init(fattr);
1da177e4 2663
2669940d
AA		 2664 /* Deal with open(O_TRUNC) */
2665 if (sattr->ia_valid & ATTR_OPEN)
2666 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2667
2668 /* Optimization: if the end result is no change, don't RPC */
2669 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2670 return 0;
2671
d530838b 2672 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2673 if (sattr->ia_valid & ATTR_FILE) {
2674 struct nfs_open_context *ctx;
2675
2676 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2677 if (ctx) {
2678 cred = ctx->cred;
2679 state = ctx->state;
2680 }
659bfcd6 2681 }
08e9eac4 2682
659bfcd6 2683 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2684 if (status == 0)
2685 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2686 return status;
2687}
2688
0c2e53f1
TM		 2689static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2690 const struct qstr *name, struct nfs_fh *fhandle,
2691 struct nfs_fattr *fattr)
2b3de441 2692{
0c2e53f1 2693 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2694 int status;
2695 struct nfs4_lookup_arg args = {
2696 .bitmask = server->attr_bitmask,
0c2e53f1 2697 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2698 .name = name,
2699 };
2700 struct nfs4_lookup_res res = {
2701 .server = server,
2702 .fattr = fattr,
2703 .fh = fhandle,
2704 };
2705 struct rpc_message msg = {
2706 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2707 .rpc_argp = &args,
2708 .rpc_resp = &res,
2709 };
2710
2711 nfs_fattr_init(fattr);
2712
1da177e4 2713 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2714 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2715 dprintk("NFS reply lookup: %d\n", status);
2716 return status;
2717}
2718
72de53ec 2719static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2720{
7ebb9315 2721 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2722 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2723 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2724 fattr->nlink = 2;
2725}
2726
72de53ec
BS		 2727static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2728 struct qstr *name, struct nfs_fh *fhandle,
2729 struct nfs_fattr *fattr)
1da177e4
LT		 2730{
2731 struct nfs4_exception exception = { };
72de53ec 2732 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2733 int err;
2734 do {
72de53ec
BS		 2735 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2736 switch (err) {
08ef7bd3 2737 case -NFS4ERR_BADNAME:
72de53ec
BS		 2738 err = -ENOENT;
2739 goto out;
0c2e53f1 2740 case -NFS4ERR_MOVED:
f05d147f 2741 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2742 goto out;
0c2e53f1 2743 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2744 err = -EPERM;
2745 if (client != *clnt)
2746 goto out;
2747
2748 client = nfs4_create_sec_client(client, dir, name);
2749 if (IS_ERR(client))
2750 return PTR_ERR(client);
2751
2752 exception.retry = 1;
2753 break;
2754 default:
2755 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2756 }
1da177e4 2757 } while (exception.retry);
72de53ec
BS		 2758
2759out:
2760 if (err == 0)
2761 *clnt = client;
2762 else if (client != *clnt)
2763 rpc_shutdown_client(client);
2764
1da177e4
LT		 2765 return err;
2766}
2767
80a16b21 2768static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2769 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2770{
2771 int status;
2772 struct rpc_clnt *client = NFS_CLIENT(dir);
2773
2774 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2775 if (client != NFS_CLIENT(dir)) {
2776 rpc_shutdown_client(client);
2777 nfs_fixup_secinfo_attributes(fattr);
2778 }
2779 return status;
2780}
2781
f05d147f
BS		 2782struct rpc_clnt *
2783nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2784 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2785{
2786 int status;
2787 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2788
2789 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2790 if (status < 0) {
2791 rpc_shutdown_client(client);
2792 return ERR_PTR(status);
2793 }
2794 return client;
2795}
2796
1da177e4
LT		 2797static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2798{
76b32999 2799 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2800 struct nfs4_accessargs args = {
2801 .fh = NFS_FH(inode),
a4980e78 2802 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2803 };
2804 struct nfs4_accessres res = {
2805 .server = server,
1da177e4 2806 };
1da177e4
LT		 2807 struct rpc_message msg = {
2808 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2809 .rpc_argp = &args,
2810 .rpc_resp = &res,
2811 .rpc_cred = entry->cred,
2812 };
2813 int mode = entry->mask;
2814 int status;
2815
2816 /*
2817 * Determine which access bits we want to ask for...
2818 */
2819 if (mode & MAY_READ)
2820 args.access |= NFS4_ACCESS_READ;
2821 if (S_ISDIR(inode->i_mode)) {
2822 if (mode & MAY_WRITE)
2823 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2824 if (mode & MAY_EXEC)
2825 args.access |= NFS4_ACCESS_LOOKUP;
2826 } else {
2827 if (mode & MAY_WRITE)
2828 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2829 if (mode & MAY_EXEC)
2830 args.access |= NFS4_ACCESS_EXECUTE;
2831 }
c407d41a
TM		 2832
2833 res.fattr = nfs_alloc_fattr();
2834 if (res.fattr == NULL)
2835 return -ENOMEM;
2836
7c513058 2837 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2838 if (!status) {
6168f62c 2839 nfs_access_set_mask(entry, res.access);
c407d41a 2840 nfs_refresh_inode(inode, res.fattr);
1da177e4 2841 }
c407d41a 2842 nfs_free_fattr(res.fattr);
1da177e4
LT		 2843 return status;
2844}
2845
2846static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2847{
2848 struct nfs4_exception exception = { };
2849 int err;
2850 do {
2851 err = nfs4_handle_exception(NFS_SERVER(inode),
2852 _nfs4_proc_access(inode, entry),
2853 &exception);
2854 } while (exception.retry);
2855 return err;
2856}
2857
2858/*
2859 * TODO: For the time being, we don't try to get any attributes
2860 * along with any of the zero-copy operations READ, READDIR,
2861 * READLINK, WRITE.
2862 *
2863 * In the case of the first three, we want to put the GETATTR
2864 * after the read-type operation -- this is because it is hard
2865 * to predict the length of a GETATTR response in v4, and thus
2866 * align the READ data correctly. This means that the GETATTR
2867 * may end up partially falling into the page cache, and we should
2868 * shift it into the 'tail' of the xdr_buf before processing.
2869 * To do this efficiently, we need to know the total length
2870 * of data received, which doesn't seem to be available outside
2871 * of the RPC layer.
2872 *
2873 * In the case of WRITE, we also want to put the GETATTR after
2874 * the operation -- in this case because we want to make sure
140150db 2875 * we get the post-operation mtime and size.
1da177e4
LT		 2876 *
2877 * Both of these changes to the XDR layer would in fact be quite
2878 * minor, but I decided to leave them for a subsequent patch.
2879 */
2880static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2881 unsigned int pgbase, unsigned int pglen)
2882{
2883 struct nfs4_readlink args = {
2884 .fh = NFS_FH(inode),
2885 .pgbase = pgbase,
2886 .pglen = pglen,
2887 .pages = &page,
2888 };
f50c7000 2889 struct nfs4_readlink_res res;
1da177e4
LT		 2890 struct rpc_message msg = {
2891 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2892 .rpc_argp = &args,
f50c7000 2893 .rpc_resp = &res,
1da177e4
LT		 2894 };
2895
7c513058 2896 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2897}
2898
2899static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2900 unsigned int pgbase, unsigned int pglen)
2901{
2902 struct nfs4_exception exception = { };
2903 int err;
2904 do {
2905 err = nfs4_handle_exception(NFS_SERVER(inode),
2906 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2907 &exception);
2908 } while (exception.retry);
2909 return err;
2910}
2911
1da177e4 2912/*
8867fe58 2913 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2914 */
1da177e4
LT		 2915static int
2916nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2917 int flags)
1da177e4 2918{
8867fe58 2919 struct nfs_open_context *ctx;
1da177e4 2920 struct nfs4_state *state;
1da177e4
LT		 2921 int status = 0;
2922
8867fe58
MS		 2923 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2924 if (IS_ERR(ctx))
2925 return PTR_ERR(ctx);
2926
a8a5da99 2927 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 2928 state = nfs4_do_open(dir, dentry, ctx->mode,
2929 flags, sattr, ctx->cred,
2930 &ctx->mdsthreshold);
d4d9cdcb 2931 d_drop(dentry);
1da177e4
LT		 2932 if (IS_ERR(state)) {
2933 status = PTR_ERR(state);
c0204fd2 2934 goto out;
1da177e4 2935 }
d4d9cdcb 2936 d_add(dentry, igrab(state->inode));
d75340cc 2937 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 2938 ctx->state = state;
1da177e4 2939out:
8867fe58 2940 put_nfs_open_context(ctx);
1da177e4
LT		 2941 return status;
2942}
2943
2944static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2945{
16e42959 2946 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2947 struct nfs_removeargs args = {
1da177e4 2948 .fh = NFS_FH(dir),
26fe5750 2949 .name = *name,
16e42959 2950 };
4fdc17b2 2951 struct nfs_removeres res = {
16e42959 2952 .server = server,
1da177e4 2953 };
1da177e4 2954 struct rpc_message msg = {
4fdc17b2
TM		 2955 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2956 .rpc_argp = &args,
2957 .rpc_resp = &res,
1da177e4 2958 };
778d2817 2959 int status;
1da177e4 2960
7c513058 2961 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 2962 if (status == 0)
16e42959 2963 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 2964 return status;
2965}
2966
2967static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2968{
2969 struct nfs4_exception exception = { };
2970 int err;
2971 do {
2972 err = nfs4_handle_exception(NFS_SERVER(dir),
2973 _nfs4_proc_remove(dir, name),
2974 &exception);
2975 } while (exception.retry);
2976 return err;
2977}
2978
e4eff1a6 2979static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2980{
e4eff1a6
TM		 2981 struct nfs_server *server = NFS_SERVER(dir);
2982 struct nfs_removeargs *args = msg->rpc_argp;
2983 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2984
e4eff1a6 2985 res->server = server;
1da177e4 2986 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 2987 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 2988}
2989
34e137cc
BS		 2990static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2991{
d9afbd1b
TM		 2992 nfs4_setup_sequence(NFS_SERVER(data->dir),
2993 &data->args.seq_args,
2994 &data->res.seq_res,
2995 task);
1da177e4
LT		 2996}
2997
e4eff1a6 2998static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2999{
e4eff1a6
TM		 3000 struct nfs_removeres *res = task->tk_msg.rpc_resp;
3001
14516c3a
TM		 3002 if (!nfs4_sequence_done(task, &res->seq_res))
3003 return 0;
9e33bed5 3004 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3005 return 0;
3006 update_changeattr(dir, &res->cinfo);
e4eff1a6 3007 return 1;
1da177e4
LT		 3008}
3009
d3d4152a
JL		 3010static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3011{
3012 struct nfs_server *server = NFS_SERVER(dir);
3013 struct nfs_renameargs *arg = msg->rpc_argp;
3014 struct nfs_renameres *res = msg->rpc_resp;
3015
3016 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3017 res->server = server;
9d12b216 3018 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3019}
3020
c6bfa1a1
BS		 3021static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3022{
d9afbd1b
TM		 3023 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3024 &data->args.seq_args,
3025 &data->res.seq_res,
3026 task);
d3d4152a
JL		 3027}
3028
3029static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3030 struct inode *new_dir)
3031{
3032 struct nfs_renameres *res = task->tk_msg.rpc_resp;
3033
3034 if (!nfs4_sequence_done(task, &res->seq_res))
3035 return 0;
3036 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3037 return 0;
3038
3039 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3040 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3041 return 1;
3042}
3043
1da177e4
LT		 3044static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3045 struct inode *new_dir, struct qstr *new_name)
3046{
6caf2c82 3047 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3048 struct nfs_renameargs arg = {
1da177e4
LT		 3049 .old_dir = NFS_FH(old_dir),
3050 .new_dir = NFS_FH(new_dir),
3051 .old_name = old_name,
3052 .new_name = new_name,
6caf2c82 3053 };
e8582a8b 3054 struct nfs_renameres res = {
6caf2c82 3055 .server = server,
1da177e4 3056 };
1da177e4
LT		 3057 struct rpc_message msg = {
3058 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3059 .rpc_argp = &arg,
3060 .rpc_resp = &res,
3061 };
011fff72 3062 int status = -ENOMEM;
1da177e4 3063
7c513058 3064 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3065 if (!status) {
3066 update_changeattr(old_dir, &res.old_cinfo);
3067 update_changeattr(new_dir, &res.new_cinfo);
3068 }
3069 return status;
3070}
3071
3072static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3073 struct inode *new_dir, struct qstr *new_name)
3074{
3075 struct nfs4_exception exception = { };
3076 int err;
3077 do {
3078 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3079 _nfs4_proc_rename(old_dir, old_name,
3080 new_dir, new_name),
3081 &exception);
3082 } while (exception.retry);
3083 return err;
3084}
3085
3086static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3087{
91ba2eee 3088 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3089 struct nfs4_link_arg arg = {
3090 .fh = NFS_FH(inode),
3091 .dir_fh = NFS_FH(dir),
3092 .name = name,
91ba2eee
TM		 3093 .bitmask = server->attr_bitmask,
3094 };
91ba2eee
TM		 3095 struct nfs4_link_res res = {
3096 .server = server,
1da177e4 3097 };
1da177e4
LT		 3098 struct rpc_message msg = {
3099 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3100 .rpc_argp = &arg,
91ba2eee 3101 .rpc_resp = &res,
1da177e4 3102 };
136f2627
TM		 3103 int status = -ENOMEM;
3104
3105 res.fattr = nfs_alloc_fattr();
778d2817 3106 if (res.fattr == NULL)
136f2627 3107 goto out;
1da177e4 3108
7c513058 3109 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3110 if (!status) {
3111 update_changeattr(dir, &res.cinfo);
73a3d07c 3112 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3113 }
136f2627 3114out:
136f2627 3115 nfs_free_fattr(res.fattr);
1da177e4
LT		 3116 return status;
3117}
3118
3119static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3120{
3121 struct nfs4_exception exception = { };
3122 int err;
3123 do {
3124 err = nfs4_handle_exception(NFS_SERVER(inode),
3125 _nfs4_proc_link(inode, dir, name),
3126 &exception);
3127 } while (exception.retry);
3128 return err;
3129}
3130
57dc9a57
TM		 3131struct nfs4_createdata {
3132 struct rpc_message msg;
3133 struct nfs4_create_arg arg;
3134 struct nfs4_create_res res;
3135 struct nfs_fh fh;
3136 struct nfs_fattr fattr;
57dc9a57
TM		 3137};
3138
3139static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3140 struct qstr *name, struct iattr *sattr, u32 ftype)
3141{
3142 struct nfs4_createdata *data;
3143
3144 data = kzalloc(sizeof(*data), GFP_KERNEL);
3145 if (data != NULL) {
3146 struct nfs_server *server = NFS_SERVER(dir);
3147
3148 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3149 data->msg.rpc_argp = &data->arg;
3150 data->msg.rpc_resp = &data->res;
3151 data->arg.dir_fh = NFS_FH(dir);
3152 data->arg.server = server;
3153 data->arg.name = name;
3154 data->arg.attrs = sattr;
3155 data->arg.ftype = ftype;
3156 data->arg.bitmask = server->attr_bitmask;
3157 data->res.server = server;
3158 data->res.fh = &data->fh;
3159 data->res.fattr = &data->fattr;
57dc9a57 3160 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3161 }
3162 return data;
3163}
3164
3165static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3166{
7c513058 3167 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3168 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3169 if (status == 0) {
3170 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3171 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3172 }
3173 return status;
3174}
3175
3176static void nfs4_free_createdata(struct nfs4_createdata *data)
3177{
3178 kfree(data);
3179}
3180
4f390c15 3181static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3182 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3183{
57dc9a57
TM		 3184 struct nfs4_createdata *data;
3185 int status = -ENAMETOOLONG;
1da177e4 3186
94a6d753 3187 if (len > NFS4_MAXPATHLEN)
57dc9a57 3188 goto out;
4f390c15 3189
57dc9a57
TM		 3190 status = -ENOMEM;
3191 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3192 if (data == NULL)
3193 goto out;
3194
3195 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3196 data->arg.u.symlink.pages = &page;
3197 data->arg.u.symlink.len = len;
1da177e4 3198
57dc9a57
TM		 3199 status = nfs4_do_create(dir, dentry, data);
3200
3201 nfs4_free_createdata(data);
3202out:
1da177e4
LT		 3203 return status;
3204}
3205
4f390c15 3206static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3207 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3208{
3209 struct nfs4_exception exception = { };
3210 int err;
3211 do {
3212 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3213 _nfs4_proc_symlink(dir, dentry, page,
3214 len, sattr),
1da177e4
LT		 3215 &exception);
3216 } while (exception.retry);
3217 return err;
3218}
3219
3220static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3221 struct iattr *sattr)
3222{
57dc9a57
TM		 3223 struct nfs4_createdata *data;
3224 int status = -ENOMEM;
1da177e4 3225
57dc9a57
TM		 3226 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3227 if (data == NULL)
3228 goto out;
3229
3230 status = nfs4_do_create(dir, dentry, data);
3231
3232 nfs4_free_createdata(data);
3233out:
1da177e4
LT		 3234 return status;
3235}
3236
3237static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3238 struct iattr *sattr)
3239{
3240 struct nfs4_exception exception = { };
3241 int err;
a8a5da99
AK		 3242
3243 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3244 do {
3245 err = nfs4_handle_exception(NFS_SERVER(dir),
3246 _nfs4_proc_mkdir(dir, dentry, sattr),
3247 &exception);
3248 } while (exception.retry);
3249 return err;
3250}
3251
3252static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3253 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3254{
3255 struct inode *dir = dentry->d_inode;
3256 struct nfs4_readdir_arg args = {
3257 .fh = NFS_FH(dir),
56e4ebf8 3258 .pages = pages,
1da177e4
LT		 3259 .pgbase = 0,
3260 .count = count,
96d25e53 3261 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3262 .plus = plus,
1da177e4
LT		 3263 };
3264 struct nfs4_readdir_res res;
3265 struct rpc_message msg = {
3266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3267 .rpc_argp = &args,
3268 .rpc_resp = &res,
3269 .rpc_cred = cred,
3270 };
3271 int status;
3272
3110ff80 3273 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3274 dentry->d_parent->d_name.name,
3275 dentry->d_name.name,
3276 (unsigned long long)cookie);
c3f52af3 3277 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3278 res.pgbase = args.pgbase;
7c513058 3279 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3280 if (status >= 0) {
c3f52af3 3281 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3282 status += args.pgbase;
3283 }
c4812998
TM		 3284
3285 nfs_invalidate_atime(dir);
3286
3110ff80 3287 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3288 return status;
3289}
3290
3291static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3292 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3293{
3294 struct nfs4_exception exception = { };
3295 int err;
3296 do {
3297 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3298 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3299 pages, count, plus),
1da177e4
LT		 3300 &exception);
3301 } while (exception.retry);
3302 return err;
3303}
3304
3305static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3306 struct iattr *sattr, dev_t rdev)
3307{
57dc9a57
TM		 3308 struct nfs4_createdata *data;
3309 int mode = sattr->ia_mode;
3310 int status = -ENOMEM;
1da177e4 3311
57dc9a57
TM		 3312 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3313 if (data == NULL)
3314 goto out;
3315
1da177e4 3316 if (S_ISFIFO(mode))
57dc9a57 3317 data->arg.ftype = NF4FIFO;
1da177e4 3318 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3319 data->arg.ftype = NF4BLK;
3320 data->arg.u.device.specdata1 = MAJOR(rdev);
3321 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3322 }
3323 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3324 data->arg.ftype = NF4CHR;
3325 data->arg.u.device.specdata1 = MAJOR(rdev);
3326 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3327 } else if (!S_ISSOCK(mode)) {
3328 status = -EINVAL;
3329 goto out_free;
1da177e4 3330 }
1da177e4 3331
57dc9a57 3332 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3333out_free:
57dc9a57
TM		 3334 nfs4_free_createdata(data);
3335out:
1da177e4
LT		 3336 return status;
3337}
3338
3339static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3340 struct iattr *sattr, dev_t rdev)
3341{
3342 struct nfs4_exception exception = { };
3343 int err;
a8a5da99
AK		 3344
3345 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3346 do {
3347 err = nfs4_handle_exception(NFS_SERVER(dir),
3348 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3349 &exception);
3350 } while (exception.retry);
3351 return err;
3352}
3353
3354static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3355 struct nfs_fsstat *fsstat)
3356{
3357 struct nfs4_statfs_arg args = {
3358 .fh = fhandle,
3359 .bitmask = server->attr_bitmask,
3360 };
24ad148a
BH		 3361 struct nfs4_statfs_res res = {
3362 .fsstat = fsstat,
3363 };
1da177e4
LT		 3364 struct rpc_message msg = {
3365 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3366 .rpc_argp = &args,
24ad148a 3367 .rpc_resp = &res,
1da177e4
LT		 3368 };
3369
0e574af1 3370 nfs_fattr_init(fsstat->fattr);
7c513058 3371 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3372}
3373
3374static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3375{
3376 struct nfs4_exception exception = { };
3377 int err;
3378 do {
3379 err = nfs4_handle_exception(server,
3380 _nfs4_proc_statfs(server, fhandle, fsstat),
3381 &exception);
3382 } while (exception.retry);
3383 return err;
3384}
3385
3386static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3387 struct nfs_fsinfo *fsinfo)
3388{
3389 struct nfs4_fsinfo_arg args = {
3390 .fh = fhandle,
3391 .bitmask = server->attr_bitmask,
3392 };
3dda5e43
BH		 3393 struct nfs4_fsinfo_res res = {
3394 .fsinfo = fsinfo,
3395 };
1da177e4
LT		 3396 struct rpc_message msg = {
3397 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3398 .rpc_argp = &args,
3dda5e43 3399 .rpc_resp = &res,
1da177e4
LT		 3400 };
3401
7c513058 3402 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3403}
3404
3405static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3406{
3407 struct nfs4_exception exception = { };
3408 int err;
3409
3410 do {
3411 err = nfs4_handle_exception(server,
3412 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3413 &exception);
3414 } while (exception.retry);
3415 return err;
3416}
3417
3418static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3419{
e38eb650
BS		 3420 int error;
3421
0e574af1 3422 nfs_fattr_init(fsinfo->fattr);
e38eb650 3423 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3424 if (error == 0) {
3425 /* block layout checks this! */
3426 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3427 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3428 }
e38eb650
BS		 3429
3430 return error;
1da177e4
LT		 3431}
3432
3433static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3434 struct nfs_pathconf *pathconf)
3435{
3436 struct nfs4_pathconf_arg args = {
3437 .fh = fhandle,
3438 .bitmask = server->attr_bitmask,
3439 };
d45b2989
BH		 3440 struct nfs4_pathconf_res res = {
3441 .pathconf = pathconf,
3442 };
1da177e4
LT		 3443 struct rpc_message msg = {
3444 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3445 .rpc_argp = &args,
d45b2989 3446 .rpc_resp = &res,
1da177e4
LT		 3447 };
3448
3449 /* None of the pathconf attributes are mandatory to implement */
3450 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3451 memset(pathconf, 0, sizeof(*pathconf));
3452 return 0;
3453 }
3454
0e574af1 3455 nfs_fattr_init(pathconf->fattr);
7c513058 3456 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3457}
3458
3459static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3460 struct nfs_pathconf *pathconf)
3461{
3462 struct nfs4_exception exception = { };
3463 int err;
3464
3465 do {
3466 err = nfs4_handle_exception(server,
3467 _nfs4_proc_pathconf(server, fhandle, pathconf),
3468 &exception);
3469 } while (exception.retry);
3470 return err;
3471}
3472
5521abfd 3473int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3474 const struct nfs_open_context *ctx,
3475 const struct nfs_lock_context *l_ctx,
3476 fmode_t fmode)
3477{
3478 const struct nfs_lockowner *lockowner = NULL;
3479
3480 if (l_ctx != NULL)
3481 lockowner = &l_ctx->lockowner;
5521abfd 3482 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3483}
3484EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3485
5521abfd
TM		 3486static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3487 const struct nfs_open_context *ctx,
3488 const struct nfs_lock_context *l_ctx,
3489 fmode_t fmode)
3490{
3491 nfs4_stateid current_stateid;
3492
3493 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3494 return false;
3495 return nfs4_stateid_match(stateid, &current_stateid);
3496}
3497
3498static bool nfs4_error_stateid_expired(int err)
3499{
3500 switch (err) {
3501 case -NFS4ERR_DELEG_REVOKED:
3502 case -NFS4ERR_ADMIN_REVOKED:
3503 case -NFS4ERR_BAD_STATEID:
3504 case -NFS4ERR_STALE_STATEID:
3505 case -NFS4ERR_OLD_STATEID:
3506 case -NFS4ERR_OPENMODE:
3507 case -NFS4ERR_EXPIRED:
3508 return true;
3509 }
3510 return false;
3511}
3512
d20581aa
BH		 3513void __nfs4_read_done_cb(struct nfs_read_data *data)
3514{
cd841605 3515 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3516}
3517
cbdabc7f 3518static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3519{
cd841605 3520 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3521
9e33bed5 3522 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3523 rpc_restart_call_prepare(task);
ec06c096 3524 return -EAGAIN;
1da177e4 3525 }
8850df99 3526
d20581aa 3527 __nfs4_read_done_cb(data);
1da177e4 3528 if (task->tk_status > 0)
ec06c096
TM		 3529 renew_lease(server, data->timestamp);
3530 return 0;
1da177e4
LT		 3531}
3532
5521abfd
TM		 3533static bool nfs4_read_stateid_changed(struct rpc_task *task,
3534 struct nfs_readargs *args)
3535{
3536
3537 if (!nfs4_error_stateid_expired(task->tk_status) ||
3538 nfs4_stateid_is_current(&args->stateid,
3539 args->context,
3540 args->lock_context,
3541 FMODE_READ))
3542 return false;
3543 rpc_restart_call_prepare(task);
3544 return true;
3545}
3546
cbdabc7f
AA		 3547static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3548{
3549
3550 dprintk("--> %s\n", __func__);
3551
3552 if (!nfs4_sequence_done(task, &data->res.seq_res))
3553 return -EAGAIN;
5521abfd
TM		 3554 if (nfs4_read_stateid_changed(task, &data->args))
3555 return -EAGAIN;
d20581aa
BH		 3556 return data->read_done_cb ? data->read_done_cb(task, data) :
3557 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3558}
3559
bdc7f021 3560static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3561{
1da177e4 3562 data->timestamp = jiffies;
cbdabc7f 3563 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3564 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3565 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3566}
3567
ea7c3303
BS		 3568static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3569{
9b206149 3570 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3571 &data->args.seq_args,
3572 &data->res.seq_res,
9b206149
TM		 3573 task))
3574 return;
3575 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3576 data->args.lock_context, FMODE_READ);
1da177e4
LT		 3577}
3578
b029bc9b 3579static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3580{
cd841605 3581 struct inode *inode = data->header->inode;
1da177e4 3582
9e33bed5 3583 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3584 rpc_restart_call_prepare(task);
788e7a89 3585 return -EAGAIN;
1da177e4 3586 }
4f9838c7 3587 if (task->tk_status >= 0) {
1da177e4 3588 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3589 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3590 }
788e7a89 3591 return 0;
1da177e4
LT		 3592}
3593
5521abfd
TM		 3594static bool nfs4_write_stateid_changed(struct rpc_task *task,
3595 struct nfs_writeargs *args)
3596{
3597
3598 if (!nfs4_error_stateid_expired(task->tk_status) ||
3599 nfs4_stateid_is_current(&args->stateid,
3600 args->context,
3601 args->lock_context,
3602 FMODE_WRITE))
3603 return false;
3604 rpc_restart_call_prepare(task);
3605 return true;
3606}
3607
b029bc9b
FI		 3608static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3609{
3610 if (!nfs4_sequence_done(task, &data->res.seq_res))
3611 return -EAGAIN;
5521abfd
TM		 3612 if (nfs4_write_stateid_changed(task, &data->args))
3613 return -EAGAIN;
d20581aa
BH		 3614 return data->write_done_cb ? data->write_done_cb(task, data) :
3615 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3616}
3617
5a37f851
TM		 3618static
3619bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3620{
5a37f851
TM		 3621 const struct nfs_pgio_header *hdr = data->header;
3622
3623 /* Don't request attributes for pNFS or O_DIRECT writes */
3624 if (data->ds_clp != NULL || hdr->dreq != NULL)
3625 return false;
3626 /* Otherwise, request attributes if and only if we don't hold
3627 * a delegation
3628 */
011e2a7f 3629 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3630}
a69aef14 3631
bdc7f021 3632static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3633{
cd841605 3634 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3635
5a37f851 3636 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3637 data->args.bitmask = NULL;
3638 data->res.fattr = NULL;
3639 } else
3640 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3641
b029bc9b
FI		 3642 if (!data->write_done_cb)
3643 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3644 data->res.server = server;
1da177e4
LT		 3645 data->timestamp = jiffies;
3646
bdc7f021 3647 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3648 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3649}
3650
c6cb80d0
BS		 3651static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3652{
9b206149 3653 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 3654 &data->args.seq_args,
3655 &data->res.seq_res,
9b206149
TM		 3656 task))
3657 return;
3658 nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
3659 data->args.lock_context, FMODE_WRITE);
1da177e4
LT		 3660}
3661
0b7c0153 3662static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3663{
d9afbd1b
TM		 3664 nfs4_setup_sequence(NFS_SERVER(data->inode),
3665 &data->args.seq_args,
3666 &data->res.seq_res,
3667 task);
1da177e4
LT		 3668}
3669
0b7c0153 3670static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3671{
1da177e4 3672 struct inode *inode = data->inode;
14516c3a 3673
9e33bed5 3674 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3675 rpc_restart_call_prepare(task);
788e7a89 3676 return -EAGAIN;
1da177e4 3677 }
788e7a89 3678 return 0;
1da177e4
LT		 3679}
3680
0b7c0153 3681static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3682{
3683 if (!nfs4_sequence_done(task, &data->res.seq_res))
3684 return -EAGAIN;
0b7c0153 3685 return data->commit_done_cb(task, data);
5f452431
FI		 3686}
3687
0b7c0153 3688static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3689{
788e7a89 3690 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3691
0b7c0153
FI		 3692 if (data->commit_done_cb == NULL)
3693 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3694 data->res.server = server;
bdc7f021 3695 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3696 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3697}
3698
9bc4e3ca
CL		 3699struct nfs4_renewdata {
3700 struct nfs_client *client;
3701 unsigned long timestamp;
3702};
3703
1da177e4
LT		 3704/*
3705 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3706 * standalone procedure for queueing an asynchronous RENEW.
3707 */
9bc4e3ca 3708static void nfs4_renew_release(void *calldata)
dc96aef9 3709{
9bc4e3ca
CL		 3710 struct nfs4_renewdata *data = calldata;
3711 struct nfs_client *clp = data->client;
dc96aef9 3712
0851de06
AB		 3713 if (atomic_read(&clp->cl_count) > 1)
3714 nfs4_schedule_state_renewal(clp);
3715 nfs_put_client(clp);
9bc4e3ca 3716 kfree(data);
dc96aef9
AB		 3717}
3718
9bc4e3ca 3719static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3720{
9bc4e3ca
CL		 3721 struct nfs4_renewdata *data = calldata;
3722 struct nfs_client *clp = data->client;
3723 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3724
3725 if (task->tk_status < 0) {
95baa25c 3726 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3727 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3728 return;
3729 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3730 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3731 return;
3732 }
3733 nfs4_schedule_path_down_recovery(clp);
1da177e4 3734 }
452e9352 3735 do_renew_lease(clp, timestamp);
1da177e4
LT		 3736}
3737
963d8fe5
TM		 3738static const struct rpc_call_ops nfs4_renew_ops = {
3739 .rpc_call_done = nfs4_renew_done,
dc96aef9 3740 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3741};
3742
2f60ea6b 3743static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3744{
3745 struct rpc_message msg = {
3746 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3747 .rpc_argp = clp,
b4454fe1 3748 .rpc_cred = cred,
1da177e4 3749 };
9bc4e3ca 3750 struct nfs4_renewdata *data;
1da177e4 3751
2f60ea6b
TM		 3752 if (renew_flags == 0)
3753 return 0;
0851de06
AB		 3754 if (!atomic_inc_not_zero(&clp->cl_count))
3755 return -EIO;
b569ad34 3756 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3757 if (data == NULL)
3758 return -ENOMEM;
3759 data->client = clp;
3760 data->timestamp = jiffies;
1da177e4 3761 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3762 &nfs4_renew_ops, data);
1da177e4
LT		 3763}
3764
8534d4ec 3765static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3766{
3767 struct rpc_message msg = {
3768 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3769 .rpc_argp = clp,
b4454fe1 3770 .rpc_cred = cred,
1da177e4
LT		 3771 };
3772 unsigned long now = jiffies;
3773 int status;
3774
3775 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3776 if (status < 0)
3777 return status;
452e9352 3778 do_renew_lease(clp, now);
1da177e4
LT		 3779 return 0;
3780}
3781
aa1870af
BF		 3782static inline int nfs4_server_supports_acls(struct nfs_server *server)
3783{
3784 return (server->caps & NFS_CAP_ACLS)
3785 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3786 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3787}
3788
21f498c2
TM		 3789/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3790 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3791 * the stack.
3792 */
21f498c2 3793#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3794
e9e3d724
NH		 3795static int buf_to_pages_noslab(const void *buf, size_t buflen,
3796 struct page **pages, unsigned int *pgbase)
3797{
3798 struct page *newpage, **spages;
3799 int rc = 0;
3800 size_t len;
3801 spages = pages;
3802
3803 do {
21f498c2 3804 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3805 newpage = alloc_page(GFP_KERNEL);
3806
3807 if (newpage == NULL)
3808 goto unwind;
3809 memcpy(page_address(newpage), buf, len);
3810 buf += len;
3811 buflen -= len;
3812 *pages++ = newpage;
3813 rc++;
3814 } while (buflen != 0);
3815
3816 return rc;
3817
3818unwind:
3819 for(; rc > 0; rc--)
3820 __free_page(spages[rc-1]);
3821 return -ENOMEM;
3822}
3823
e50a1c2e
BF		 3824struct nfs4_cached_acl {
3825 int cached;
3826 size_t len;
3e9d4154 3827 char data[0];
e50a1c2e
BF		 3828};
3829
3830static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3831{
3832 struct nfs_inode *nfsi = NFS_I(inode);
3833
3834 spin_lock(&inode->i_lock);
3835 kfree(nfsi->nfs4_acl);
3836 nfsi->nfs4_acl = acl;
3837 spin_unlock(&inode->i_lock);
3838}
3839
3840static void nfs4_zap_acl_attr(struct inode *inode)
3841{
3842 nfs4_set_cached_acl(inode, NULL);
3843}
3844
3845static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3846{
3847 struct nfs_inode *nfsi = NFS_I(inode);
3848 struct nfs4_cached_acl *acl;
3849 int ret = -ENOENT;
3850
3851 spin_lock(&inode->i_lock);
3852 acl = nfsi->nfs4_acl;
3853 if (acl == NULL)
3854 goto out;
3855 if (buf == NULL) /* user is just asking for length */
3856 goto out_len;
3857 if (acl->cached == 0)
3858 goto out;
3859 ret = -ERANGE; /* see getxattr(2) man page */
3860 if (acl->len > buflen)
3861 goto out;
3862 memcpy(buf, acl->data, acl->len);
3863out_len:
3864 ret = acl->len;
3865out:
3866 spin_unlock(&inode->i_lock);
3867 return ret;
3868}
3869
5794d21e 3870static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3871{
3872 struct nfs4_cached_acl *acl;
b291f1b1 3873 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3874
1f1ea6c2 3875 if (buflen <= PAGE_SIZE) {
b291f1b1 3876 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3877 if (acl == NULL)
3878 goto out;
3879 acl->cached = 1;
5794d21e 3880 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3881 } else {
3882 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3883 if (acl == NULL)
3884 goto out;
3885 acl->cached = 0;
3886 }
3887 acl->len = acl_len;
3888out:
3889 nfs4_set_cached_acl(inode, acl);
3890}
3891
bf118a34
AA		 3892/*
3893 * The getxattr API returns the required buffer length when called with a
3894 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3895 * the required buf. On a NULL buf, we send a page of data to the server
3896 * guessing that the ACL request can be serviced by a page. If so, we cache
3897 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3898 * the cache. If not so, we throw away the page, and cache the required
3899 * length. The next getxattr call will then produce another round trip to
3900 * the server, this time with the input buf of the required size.
3901 */
16b4289c 3902static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3903{
bf118a34 3904 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3905 struct nfs_getaclargs args = {
3906 .fh = NFS_FH(inode),
3907 .acl_pages = pages,
3908 .acl_len = buflen,
3909 };
663c79b3
BH		 3910 struct nfs_getaclres res = {
3911 .acl_len = buflen,
3912 };
aa1870af
BF		 3913 struct rpc_message msg = {
3914 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3915 .rpc_argp = &args,
663c79b3 3916 .rpc_resp = &res,
aa1870af 3917 };
21f498c2
TM		 3918 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3919 int ret = -ENOMEM, i;
aa1870af 3920
bf118a34
AA		 3921 /* As long as we're doing a round trip to the server anyway,
3922 * let's be prepared for a page of acl data. */
3923 if (npages == 0)
3924 npages = 1;
21f498c2
TM		 3925 if (npages > ARRAY_SIZE(pages))
3926 return -ERANGE;
5a006899 3927
bf118a34
AA		 3928 for (i = 0; i < npages; i++) {
3929 pages[i] = alloc_page(GFP_KERNEL);
3930 if (!pages[i])
3931 goto out_free;
e50a1c2e 3932 }
5a006899
SP		 3933
3934 /* for decoding across pages */
3935 res.acl_scratch = alloc_page(GFP_KERNEL);
3936 if (!res.acl_scratch)
3937 goto out_free;
3938
bf118a34
AA		 3939 args.acl_len = npages * PAGE_SIZE;
3940 args.acl_pgbase = 0;
5a006899 3941
de040bec 3942 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3943 __func__, buf, buflen, npages, args.acl_len);
3944 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3945 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3946 if (ret)
3947 goto out_free;
bf118a34 3948
1f1ea6c2
TM		 3949 /* Handle the case where the passed-in buffer is too short */
3950 if (res.acl_flags & NFS4_ACL_TRUNC) {
3951 /* Did the user only issue a request for the acl length? */
3952 if (buf == NULL)
3953 goto out_ok;
e50a1c2e 3954 ret = -ERANGE;
1f1ea6c2 3955 goto out_free;
e50a1c2e 3956 }
1f1ea6c2 3957 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 3958 if (buf) {
3959 if (res.acl_len > buflen) {
3960 ret = -ERANGE;
3961 goto out_free;
3962 }
1f1ea6c2 3963 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 3964 }
1f1ea6c2
TM		 3965out_ok:
3966 ret = res.acl_len;
e50a1c2e 3967out_free:
bf118a34
AA		 3968 for (i = 0; i < npages; i++)
3969 if (pages[i])
3970 __free_page(pages[i]);
331818f1
TM		 3971 if (res.acl_scratch)
3972 __free_page(res.acl_scratch);
aa1870af
BF		 3973 return ret;
3974}
3975
16b4289c
TM		 3976static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3977{
3978 struct nfs4_exception exception = { };
3979 ssize_t ret;
3980 do {
3981 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3982 if (ret >= 0)
3983 break;
3984 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3985 } while (exception.retry);
3986 return ret;
3987}
3988
e50a1c2e
BF		 3989static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3990{
3991 struct nfs_server *server = NFS_SERVER(inode);
3992 int ret;
3993
3994 if (!nfs4_server_supports_acls(server))
3995 return -EOPNOTSUPP;
3996 ret = nfs_revalidate_inode(server, inode);
3997 if (ret < 0)
3998 return ret;
08a22b39
AK		 3999 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4000 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4001 ret = nfs4_read_cached_acl(inode, buf, buflen);
4002 if (ret != -ENOENT)
bf118a34
AA		 4003 /* -ENOENT is returned if there is no ACL or if there is an ACL
4004 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4005 return ret;
4006 return nfs4_get_acl_uncached(inode, buf, buflen);
4007}
4008
16b4289c 4009static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4010{
4011 struct nfs_server *server = NFS_SERVER(inode);
4012 struct page *pages[NFS4ACL_MAXPAGES];
4013 struct nfs_setaclargs arg = {
4014 .fh = NFS_FH(inode),
4015 .acl_pages = pages,
4016 .acl_len = buflen,
4017 };
73c403a9 4018 struct nfs_setaclres res;
4b580ee3
BF		 4019 struct rpc_message msg = {
4020 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4021 .rpc_argp = &arg,
73c403a9 4022 .rpc_resp = &res,
4b580ee3 4023 };
21f498c2 4024 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4025 int ret, i;
4b580ee3
BF		 4026
4027 if (!nfs4_server_supports_acls(server))
4028 return -EOPNOTSUPP;
21f498c2
TM		 4029 if (npages > ARRAY_SIZE(pages))
4030 return -ERANGE;
e9e3d724
NH		 4031 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4032 if (i < 0)
4033 return i;
57ec14c5 4034 nfs4_inode_return_delegation(inode);
7c513058 4035 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4036
4037 /*
4038 * Free each page after tx, so the only ref left is
4039 * held by the network stack
4040 */
4041 for (; i > 0; i--)
4042 put_page(pages[i-1]);
4043
08a22b39
AK		 4044 /*
4045 * Acl update can result in inode attribute update.
4046 * so mark the attribute cache invalid.
4047 */
4048 spin_lock(&inode->i_lock);
4049 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4050 spin_unlock(&inode->i_lock);
f41f7418
TM		 4051 nfs_access_zap_cache(inode);
4052 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4053 return ret;
4054}
4055
16b4289c
TM		 4056static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4057{
4058 struct nfs4_exception exception = { };
4059 int err;
4060 do {
4061 err = nfs4_handle_exception(NFS_SERVER(inode),
4062 __nfs4_proc_set_acl(inode, buf, buflen),
4063 &exception);
4064 } while (exception.retry);
4065 return err;
4066}
4067
1da177e4 4068static int
aa5190d0 4069nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4070{
aa5190d0
TM		 4071 struct nfs_client *clp = server->nfs_client;
4072
4073 if (task->tk_status >= 0)
1da177e4
LT		 4074 return 0;
4075 switch(task->tk_status) {
a1d0b5ee 4076 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4077 case -NFS4ERR_ADMIN_REVOKED:
4078 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4079 if (state == NULL)
4080 break;
4081 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4082 case -NFS4ERR_OPENMODE:
4083 if (state == NULL)
4084 break;
5d422301
TM		 4085 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4086 goto stateid_invalid;
0400a6b0 4087 goto wait_on_recovery;
0ced63d1 4088 case -NFS4ERR_EXPIRED:
5d422301
TM		 4089 if (state != NULL) {
4090 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4091 goto stateid_invalid;
4092 }
1da177e4 4093 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4094 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4095 nfs4_schedule_lease_recovery(clp);
4096 goto wait_on_recovery;
4745e315
AA		 4097#if defined(CONFIG_NFS_V4_1)
4098 case -NFS4ERR_BADSESSION:
4099 case -NFS4ERR_BADSLOT:
4100 case -NFS4ERR_BAD_HIGH_SLOT:
4101 case -NFS4ERR_DEADSESSION:
4102 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4103 case -NFS4ERR_SEQ_FALSE_RETRY:
4104 case -NFS4ERR_SEQ_MISORDERED:
4105 dprintk("%s ERROR %d, Reset session\n", __func__,
4106 task->tk_status);
9f594791 4107 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4108 task->tk_status = 0;
4109 return -EAGAIN;
4110#endif /* CONFIG_NFS_V4_1 */
1da177e4 4111 case -NFS4ERR_DELAY:
aa5190d0 4112 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4113 case -NFS4ERR_GRACE:
1da177e4
LT		 4114 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4115 task->tk_status = 0;
4116 return -EAGAIN;
a8a4ae3a 4117 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4118 case -NFS4ERR_OLD_STATEID:
4119 task->tk_status = 0;
4120 return -EAGAIN;
4121 }
4122 task->tk_status = nfs4_map_errors(task->tk_status);
4123 return 0;
5d422301
TM		 4124stateid_invalid:
4125 task->tk_status = -EIO;
4126 return 0;
0400a6b0 4127wait_on_recovery:
a2c0b9e2 4128 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4129 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4130 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4131 task->tk_status = 0;
4132 return -EAGAIN;
1da177e4
LT		 4133}
4134
f092075d
CL		 4135static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4136 nfs4_verifier *bootverf)
cd93710e
CL		 4137{
4138 __be32 verf[2];
4139
2c820d9a
CL		 4140 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4141 /* An impossible timestamp guarantees this value
4142 * will never match a generated boot time. */
4143 verf[0] = 0;
4144 verf[1] = (__be32)(NSEC_PER_SEC + 1);
4145 } else {
f092075d
CL		 4146 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4147 verf[0] = (__be32)nn->boot_time.tv_sec;
4148 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4149 }
cd93710e
CL		 4150 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4151}
4152
e984a55a
CL		 4153static unsigned int
4154nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4155 char *buf, size_t len)
4156{
4157 unsigned int result;
4158
4159 rcu_read_lock();
4160 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4161 clp->cl_ipaddr,
4162 rpc_peeraddr2str(clp->cl_rpcclient,
4163 RPC_DISPLAY_ADDR),
4164 rpc_peeraddr2str(clp->cl_rpcclient,
4165 RPC_DISPLAY_PROTO));
4166 rcu_read_unlock();
4167 return result;
4168}
4169
4170static unsigned int
4171nfs4_init_uniform_client_string(const struct nfs_client *clp,
4172 char *buf, size_t len)
4173{
6f2ea7f2
CL		 4174 char *nodename = clp->cl_rpcclient->cl_nodename;
4175
4176 if (nfs4_client_id_uniquifier[0] != '\0')
4177 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4178 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4179 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4180 nodename);
e984a55a
CL		 4181}
4182
6bbb4ae8
CL		 4183/**
4184 * nfs4_proc_setclientid - Negotiate client ID
4185 * @clp: state data structure
4186 * @program: RPC program for NFSv4 callback service
4187 * @port: IP port number for NFS4 callback service
4188 * @cred: RPC credential to use for this call
4189 * @res: where to place the result
4190 *
4191 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4192 */
bb8b27e5
TM		 4193int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4194 unsigned short port, struct rpc_cred *cred,
4195 struct nfs4_setclientid_res *res)
1da177e4
LT		 4196{
4197 nfs4_verifier sc_verifier;
4198 struct nfs4_setclientid setclientid = {
4199 .sc_verifier = &sc_verifier,
4200 .sc_prog = program,
f4eecd5d 4201 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4202 };
4203 struct rpc_message msg = {
4204 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4205 .rpc_argp = &setclientid,
bb8b27e5 4206 .rpc_resp = res,
286d7d6a 4207 .rpc_cred = cred,
1da177e4 4208 };
6bbb4ae8 4209 int status;
1da177e4 4210
de734831 4211 /* nfs_client_id4 */
f092075d 4212 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4213 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4214 setclientid.sc_name_len =
4215 nfs4_init_uniform_client_string(clp,
4216 setclientid.sc_name,
4217 sizeof(setclientid.sc_name));
4218 else
4219 setclientid.sc_name_len =
4220 nfs4_init_nonuniform_client_string(clp,
4221 setclientid.sc_name,
4222 sizeof(setclientid.sc_name));
de734831 4223 /* cb_client4 */
e984a55a 4224 rcu_read_lock();
de734831 4225 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4226 sizeof(setclientid.sc_netid),
4227 rpc_peeraddr2str(clp->cl_rpcclient,
4228 RPC_DISPLAY_NETID));
de734831
CL		 4229 rcu_read_unlock();
4230 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4231 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4232 clp->cl_ipaddr, port >> 8, port & 255);
4233
6bbb4ae8
CL		 4234 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4235 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4236 setclientid.sc_name_len, setclientid.sc_name);
4237 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4238 dprintk("NFS reply setclientid: %d\n", status);
4239 return status;
1da177e4
LT		 4240}
4241
6bbb4ae8
CL		 4242/**
4243 * nfs4_proc_setclientid_confirm - Confirm client ID
4244 * @clp: state data structure
4245 * @res: result of a previous SETCLIENTID
4246 * @cred: RPC credential to use for this call
4247 *
4248 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4249 */
fd954ae1 4250int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4251 struct nfs4_setclientid_res *arg,
4252 struct rpc_cred *cred)
1da177e4
LT		 4253{
4254 struct nfs_fsinfo fsinfo;
4255 struct rpc_message msg = {
4256 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4257 .rpc_argp = arg,
1da177e4 4258 .rpc_resp = &fsinfo,
286d7d6a 4259 .rpc_cred = cred,
1da177e4
LT		 4260 };
4261 unsigned long now;
4262 int status;
4263
6bbb4ae8
CL		 4264 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4265 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4266 clp->cl_clientid);
1da177e4 4267 now = jiffies;
1bd714f2 4268 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4269 if (status == 0) {
4270 spin_lock(&clp->cl_lock);
4271 clp->cl_lease_time = fsinfo.lease_time * HZ;
4272 clp->cl_last_renewal = now;
4273 spin_unlock(&clp->cl_lock);
4274 }
6bbb4ae8 4275 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4276 return status;
4277}
4278
fe650407
TM		 4279struct nfs4_delegreturndata {
4280 struct nfs4_delegreturnargs args;
fa178f29 4281 struct nfs4_delegreturnres res;
fe650407
TM		 4282 struct nfs_fh fh;
4283 nfs4_stateid stateid;
26e976a8 4284 unsigned long timestamp;
fa178f29 4285 struct nfs_fattr fattr;
fe650407
TM		 4286 int rpc_status;
4287};
4288
fe650407
TM		 4289static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4290{
4291 struct nfs4_delegreturndata *data = calldata;
938e1010 4292
14516c3a
TM		 4293 if (!nfs4_sequence_done(task, &data->res.seq_res))
4294 return;
938e1010 4295
79708861
RL		 4296 switch (task->tk_status) {
4297 case -NFS4ERR_STALE_STATEID:
4298 case -NFS4ERR_EXPIRED:
4299 case 0:
fa178f29 4300 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4301 break;
4302 default:
4303 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4304 -EAGAIN) {
d00c5d43 4305 rpc_restart_call_prepare(task);
79708861
RL		 4306 return;
4307 }
4308 }
4309 data->rpc_status = task->tk_status;
fe650407
TM		 4310}
4311
4312static void nfs4_delegreturn_release(void *calldata)
4313{
fe650407
TM		 4314 kfree(calldata);
4315}
4316
938e1010
AA		 4317#if defined(CONFIG_NFS_V4_1)
4318static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4319{
4320 struct nfs4_delegreturndata *d_data;
4321
4322 d_data = (struct nfs4_delegreturndata *)data;
4323
d9afbd1b
TM		 4324 nfs4_setup_sequence(d_data->res.server,
4325 &d_data->args.seq_args,
4326 &d_data->res.seq_res,
4327 task);
938e1010
AA		 4328}
4329#endif /* CONFIG_NFS_V4_1 */
4330
c8d149f3 4331static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4332#if defined(CONFIG_NFS_V4_1)
4333 .rpc_call_prepare = nfs4_delegreturn_prepare,
4334#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4335 .rpc_call_done = nfs4_delegreturn_done,
4336 .rpc_release = nfs4_delegreturn_release,
4337};
4338
e6f81075 4339static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4340{
4341 struct nfs4_delegreturndata *data;
fa178f29 4342 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4343 struct rpc_task *task;
5138fde0
TM		 4344 struct rpc_message msg = {
4345 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4346 .rpc_cred = cred,
4347 };
c970aa85
TM		 4348 struct rpc_task_setup task_setup_data = {
4349 .rpc_client = server->client,
5138fde0 4350 .rpc_message = &msg,
c970aa85
TM		 4351 .callback_ops = &nfs4_delegreturn_ops,
4352 .flags = RPC_TASK_ASYNC,
4353 };
e6f81075 4354 int status = 0;
fe650407 4355
8535b2be 4356 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4357 if (data == NULL)
4358 return -ENOMEM;
9d12b216 4359 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4360 data->args.fhandle = &data->fh;
4361 data->args.stateid = &data->stateid;
9e907fec 4362 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4363 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4364 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4365 data->res.fattr = &data->fattr;
4366 data->res.server = server;
5138fde0 4367 nfs_fattr_init(data->res.fattr);
26e976a8 4368 data->timestamp = jiffies;
fe650407
TM		 4369 data->rpc_status = 0;
4370
c970aa85 4371 task_setup_data.callback_data = data;
1174dd1f
TM		 4372 msg.rpc_argp = &data->args;
4373 msg.rpc_resp = &data->res;
c970aa85 4374 task = rpc_run_task(&task_setup_data);
7a1218a2 4375 if (IS_ERR(task))
fe650407 4376 return PTR_ERR(task);
e6f81075
TM		 4377 if (!issync)
4378 goto out;
fe650407 4379 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4380 if (status != 0)
4381 goto out;
4382 status = data->rpc_status;
e144cbcc
TM		 4383 if (status == 0)
4384 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4385 else
4386 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4387out:
e6b3c4db 4388 rpc_put_task(task);
fe650407 4389 return status;
1da177e4
LT		 4390}
4391
e6f81075 4392int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4393{
4394 struct nfs_server *server = NFS_SERVER(inode);
4395 struct nfs4_exception exception = { };
4396 int err;
4397 do {
e6f81075 4398 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4399 switch (err) {
4400 case -NFS4ERR_STALE_STATEID:
4401 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4402 case 0:
4403 return 0;
4404 }
4405 err = nfs4_handle_exception(server, err, &exception);
4406 } while (exception.retry);
4407 return err;
4408}
4409
4410#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4411#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4412
4413/*
4414 * sleep, with exponential backoff, and retry the LOCK operation.
4415 */
4416static unsigned long
4417nfs4_set_lock_task_retry(unsigned long timeout)
4418{
d310310c 4419 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4420 timeout <<= 1;
4421 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4422 return NFS4_LOCK_MAXTIMEOUT;
4423 return timeout;
4424}
4425
1da177e4
LT		 4426static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4427{
4428 struct inode *inode = state->inode;
4429 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4430 struct nfs_client *clp = server->nfs_client;
911d1aaf 4431 struct nfs_lockt_args arg = {
1da177e4 4432 .fh = NFS_FH(inode),
911d1aaf 4433 .fl = request,
1da177e4 4434 };
911d1aaf
TM		 4435 struct nfs_lockt_res res = {
4436 .denied = request,
1da177e4
LT		 4437 };
4438 struct rpc_message msg = {
4439 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4440 .rpc_argp = &arg,
4441 .rpc_resp = &res,
4442 .rpc_cred = state->owner->so_cred,
4443 };
1da177e4
LT		 4444 struct nfs4_lock_state *lsp;
4445 int status;
4446
911d1aaf 4447 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4448 status = nfs4_set_lock_state(state, request);
4449 if (status != 0)
4450 goto out;
4451 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4452 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4453 arg.lock_owner.s_dev = server->s_dev;
7c513058 4454 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4455 switch (status) {
4456 case 0:
4457 request->fl_type = F_UNLCK;
4458 break;
4459 case -NFS4ERR_DENIED:
4460 status = 0;
1da177e4 4461 }
70cc6487 4462 request->fl_ops->fl_release_private(request);
8d0a8a9d 4463out:
1da177e4
LT		 4464 return status;
4465}
4466
4467static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4468{
4469 struct nfs4_exception exception = { };
4470 int err;
4471
4472 do {
4473 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4474 _nfs4_proc_getlk(state, cmd, request),
4475 &exception);
4476 } while (exception.retry);
4477 return err;
4478}
4479
4480static int do_vfs_lock(struct file *file, struct file_lock *fl)
4481{
4482 int res = 0;
4483 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4484 case FL_POSIX:
4485 res = posix_lock_file_wait(file, fl);
4486 break;
4487 case FL_FLOCK:
4488 res = flock_lock_file_wait(file, fl);
4489 break;
4490 default:
4491 BUG();
4492 }
1da177e4
LT		 4493 return res;
4494}
4495
faf5f49c 4496struct nfs4_unlockdata {
911d1aaf
TM		 4497 struct nfs_locku_args arg;
4498 struct nfs_locku_res res;
faf5f49c
TM		 4499 struct nfs4_lock_state *lsp;
4500 struct nfs_open_context *ctx;
911d1aaf
TM		 4501 struct file_lock fl;
4502 const struct nfs_server *server;
26e976a8 4503 unsigned long timestamp;
faf5f49c
TM		 4504};
4505
911d1aaf
TM		 4506static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4507 struct nfs_open_context *ctx,
4508 struct nfs4_lock_state *lsp,
4509 struct nfs_seqid *seqid)
4510{
4511 struct nfs4_unlockdata *p;
4512 struct inode *inode = lsp->ls_state->inode;
4513
8535b2be 4514 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4515 if (p == NULL)
4516 return NULL;
4517 p->arg.fh = NFS_FH(inode);
4518 p->arg.fl = &p->fl;
4519 p->arg.seqid = seqid;
c1d51931 4520 p->res.seqid = seqid;
911d1aaf
TM		 4521 p->arg.stateid = &lsp->ls_stateid;
4522 p->lsp = lsp;
4523 atomic_inc(&lsp->ls_count);
4524 /* Ensure we don't close file until we're done freeing locks! */
4525 p->ctx = get_nfs_open_context(ctx);
4526 memcpy(&p->fl, fl, sizeof(p->fl));
4527 p->server = NFS_SERVER(inode);
4528 return p;
4529}
4530
06f814a3 4531static void nfs4_locku_release_calldata(void *data)
faf5f49c 4532{
963d8fe5 4533 struct nfs4_unlockdata *calldata = data;
911d1aaf 4534 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4535 nfs4_put_lock_state(calldata->lsp);
4536 put_nfs_open_context(calldata->ctx);
4537 kfree(calldata);
faf5f49c
TM		 4538}
4539
963d8fe5 4540static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4541{
963d8fe5 4542 struct nfs4_unlockdata *calldata = data;
faf5f49c 4543
14516c3a
TM		 4544 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4545 return;
faf5f49c
TM		 4546 switch (task->tk_status) {
4547 case 0:
f597c537
TM		 4548 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4549 &calldata->res.stateid);
26e976a8 4550 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4551 break;
9e33bed5
TM		 4552 case -NFS4ERR_BAD_STATEID:
4553 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4554 case -NFS4ERR_STALE_STATEID:
4555 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4556 break;
4557 default:
9e33bed5 4558 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4559 rpc_restart_call_prepare(task);
faf5f49c 4560 }
2b1bc308 4561 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4562}
4563
4ce70ada 4564static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4565{
4ce70ada 4566 struct nfs4_unlockdata *calldata = data;
faf5f49c 4567
911d1aaf 4568 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 4569 goto out_wait;
795a88c9 4570 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 4571 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 4572 goto out_no_action;
faf5f49c 4573 }
26e976a8 4574 calldata->timestamp = jiffies;
035168ab 4575 if (nfs4_setup_sequence(calldata->server,
a893693c 4576 &calldata->arg.seq_args,
2240a9e2
TM		 4577 &calldata->res.seq_res,
4578 task) != 0)
4579 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 4580 return;
4581out_no_action:
4582 task->tk_action = NULL;
4583out_wait:
4584 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4585}
4586
963d8fe5 4587static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4588 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4589 .rpc_call_done = nfs4_locku_done,
06f814a3 4590 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4591};
4592
a5d16a4d
TM		 4593static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4594 struct nfs_open_context *ctx,
4595 struct nfs4_lock_state *lsp,
4596 struct nfs_seqid *seqid)
4597{
4598 struct nfs4_unlockdata *data;
5138fde0
TM		 4599 struct rpc_message msg = {
4600 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4601 .rpc_cred = ctx->cred,
4602 };
c970aa85
TM		 4603 struct rpc_task_setup task_setup_data = {
4604 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4605 .rpc_message = &msg,
c970aa85 4606 .callback_ops = &nfs4_locku_ops,
101070ca 4607 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4608 .flags = RPC_TASK_ASYNC,
4609 };
a5d16a4d 4610
137d6aca
FF		 4611 /* Ensure this is an unlock - when canceling a lock, the
4612 * canceled lock is passed in, and it won't be an unlock.
4613 */
4614 fl->fl_type = F_UNLCK;
4615
a5d16a4d
TM		 4616 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4617 if (data == NULL) {
4618 nfs_free_seqid(seqid);
4619 return ERR_PTR(-ENOMEM);
4620 }
4621
9d12b216 4622 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4623 msg.rpc_argp = &data->arg;
4624 msg.rpc_resp = &data->res;
c970aa85
TM		 4625 task_setup_data.callback_data = data;
4626 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4627}
4628
faf5f49c
TM		 4629static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4630{
65b62a29
TM		 4631 struct inode *inode = state->inode;
4632 struct nfs4_state_owner *sp = state->owner;
4633 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 4634 struct nfs_seqid *seqid;
1da177e4 4635 struct nfs4_lock_state *lsp;
06f814a3
TM		 4636 struct rpc_task *task;
4637 int status = 0;
536ff0f8 4638 unsigned char fl_flags = request->fl_flags;
faf5f49c 4639
8d0a8a9d 4640 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4641 /* Unlock _before_ we do the RPC call */
4642 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 4643 /* Exclude nfs_delegation_claim_locks() */
4644 mutex_lock(&sp->so_delegreturn_mutex);
4645 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 4646 down_read(&nfsi->rwsem);
4647 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4648 up_read(&nfsi->rwsem);
65b62a29 4649 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 4650 goto out;
19e03c57
TM		 4651 }
4652 up_read(&nfsi->rwsem);
65b62a29 4653 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 4654 if (status != 0)
9b073574
TM		 4655 goto out;
4656 /* Is this a delegated lock? */
4657 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4658 goto out;
8d0a8a9d 4659 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4660 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4661 status = -ENOMEM;
911d1aaf 4662 if (seqid == NULL)
9b073574 4663 goto out;
cd3758e3 4664 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4665 status = PTR_ERR(task);
4666 if (IS_ERR(task))
9b073574 4667 goto out;
a5d16a4d 4668 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4669 rpc_put_task(task);
9b073574 4670out:
536ff0f8 4671 request->fl_flags = fl_flags;
1da177e4
LT		 4672 return status;
4673}
4674
a5d16a4d
TM		 4675struct nfs4_lockdata {
4676 struct nfs_lock_args arg;
4677 struct nfs_lock_res res;
4678 struct nfs4_lock_state *lsp;
4679 struct nfs_open_context *ctx;
4680 struct file_lock fl;
26e976a8 4681 unsigned long timestamp;
a5d16a4d
TM		 4682 int rpc_status;
4683 int cancelled;
66179efe 4684 struct nfs_server *server;
a5d16a4d
TM		 4685};
4686
4687static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4688 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4689 gfp_t gfp_mask)
1da177e4 4690{
a5d16a4d
TM		 4691 struct nfs4_lockdata *p;
4692 struct inode *inode = lsp->ls_state->inode;
1da177e4 4693 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4694
8535b2be 4695 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4696 if (p == NULL)
4697 return NULL;
4698
4699 p->arg.fh = NFS_FH(inode);
4700 p->arg.fl = &p->fl;
8535b2be 4701 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4702 if (p->arg.open_seqid == NULL)
4703 goto out_free;
8535b2be 4704 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4705 if (p->arg.lock_seqid == NULL)
2f74c0a0 4706 goto out_free_seqid;
a5d16a4d 4707 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4708 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4709 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4710 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4711 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4712 p->lsp = lsp;
66179efe 4713 p->server = server;
a5d16a4d
TM		 4714 atomic_inc(&lsp->ls_count);
4715 p->ctx = get_nfs_open_context(ctx);
4716 memcpy(&p->fl, fl, sizeof(p->fl));
4717 return p;
2f74c0a0
TM		 4718out_free_seqid:
4719 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4720out_free:
4721 kfree(p);
4722 return NULL;
4723}
4724
4725static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4726{
4727 struct nfs4_lockdata *data = calldata;
4728 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4729
3110ff80 4730 dprintk("%s: begin!\n", __func__);
2f74c0a0 4731 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 4732 goto out_wait;
a5d16a4d
TM		 4733 /* Do we need to do an open_to_lock_owner? */
4734 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4735 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4736 goto out_release_lock_seqid;
8fe72bac 4737 }
a5d16a4d
TM		 4738 data->arg.open_stateid = &state->stateid;
4739 data->arg.new_lock_owner = 1;
c1d51931 4740 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4741 } else
4742 data->arg.new_lock_owner = 0;
5d422301
TM		 4743 if (!nfs4_valid_open_stateid(state)) {
4744 data->rpc_status = -EBADF;
4745 task->tk_action = NULL;
4746 goto out_release_open_seqid;
4747 }
26e976a8 4748 data->timestamp = jiffies;
035168ab
TM		 4749 if (nfs4_setup_sequence(data->server,
4750 &data->arg.seq_args,
2240a9e2 4751 &data->res.seq_res,
d9afbd1b 4752 task) == 0)
66179efe 4753 return;
5d422301 4754out_release_open_seqid:
2240a9e2
TM		 4755 nfs_release_seqid(data->arg.open_seqid);
4756out_release_lock_seqid:
4757 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 4758out_wait:
4759 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 4760 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4761}
4762
a5d16a4d
TM		 4763static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4764{
4765 struct nfs4_lockdata *data = calldata;
4766
3110ff80 4767 dprintk("%s: begin!\n", __func__);
a5d16a4d 4768
14516c3a
TM		 4769 if (!nfs4_sequence_done(task, &data->res.seq_res))
4770 return;
66179efe 4771
a5d16a4d 4772 data->rpc_status = task->tk_status;
a5d16a4d 4773 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4774 if (data->rpc_status == 0)
4775 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4776 else
4777 goto out;
4778 }
4779 if (data->rpc_status == 0) {
f597c537 4780 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4781 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4782 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4783 }
a5d16a4d 4784out:
3110ff80 4785 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4786}
4787
4788static void nfs4_lock_release(void *calldata)
4789{
4790 struct nfs4_lockdata *data = calldata;
4791
3110ff80 4792 dprintk("%s: begin!\n", __func__);
2f74c0a0 4793 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4794 if (data->cancelled != 0) {
4795 struct rpc_task *task;
4796 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4797 data->arg.lock_seqid);
4798 if (!IS_ERR(task))
bf294b41 4799 rpc_put_task_async(task);
3110ff80 4800 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4801 } else
4802 nfs_free_seqid(data->arg.lock_seqid);
4803 nfs4_put_lock_state(data->lsp);
4804 put_nfs_open_context(data->ctx);
4805 kfree(data);
3110ff80 4806 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4807}
4808
4809static const struct rpc_call_ops nfs4_lock_ops = {
4810 .rpc_call_prepare = nfs4_lock_prepare,
4811 .rpc_call_done = nfs4_lock_done,
4812 .rpc_release = nfs4_lock_release,
4813};
4814
2bee72a6
TM		 4815static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4816{
2bee72a6
TM		 4817 switch (error) {
4818 case -NFS4ERR_ADMIN_REVOKED:
4819 case -NFS4ERR_BAD_STATEID:
ecac799a 4820 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4821 if (new_lock_owner != 0 ||
795a88c9 4822 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4823 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4824 break;
4825 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4826 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4827 case -NFS4ERR_EXPIRED:
4828 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4829 };
4830}
4831
afe6c27c 4832static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4833{
4834 struct nfs4_lockdata *data;
4835 struct rpc_task *task;
5138fde0
TM		 4836 struct rpc_message msg = {
4837 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4838 .rpc_cred = state->owner->so_cred,
4839 };
c970aa85
TM		 4840 struct rpc_task_setup task_setup_data = {
4841 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4842 .rpc_message = &msg,
c970aa85 4843 .callback_ops = &nfs4_lock_ops,
101070ca 4844 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4845 .flags = RPC_TASK_ASYNC,
4846 };
a5d16a4d
TM		 4847 int ret;
4848
3110ff80 4849 dprintk("%s: begin!\n", __func__);
cd3758e3 4850 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4851 fl->fl_u.nfs4_fl.owner,
4852 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4853 if (data == NULL)
4854 return -ENOMEM;
4855 if (IS_SETLKW(cmd))
4856 data->arg.block = 1;
9d12b216 4857 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4858 msg.rpc_argp = &data->arg;
4859 msg.rpc_resp = &data->res;
c970aa85 4860 task_setup_data.callback_data = data;
8fe72bac
TM		 4861 if (recovery_type > NFS_LOCK_NEW) {
4862 if (recovery_type == NFS_LOCK_RECLAIM)
4863 data->arg.reclaim = NFS_LOCK_RECLAIM;
4864 nfs4_set_sequence_privileged(&data->arg.seq_args);
4865 }
c970aa85 4866 task = rpc_run_task(&task_setup_data);
7a1218a2 4867 if (IS_ERR(task))
a5d16a4d 4868 return PTR_ERR(task);
a5d16a4d
TM		 4869 ret = nfs4_wait_for_completion_rpc_task(task);
4870 if (ret == 0) {
4871 ret = data->rpc_status;
2bee72a6
TM		 4872 if (ret)
4873 nfs4_handle_setlk_error(data->server, data->lsp,
4874 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4875 } else
4876 data->cancelled = 1;
e6b3c4db 4877 rpc_put_task(task);
3110ff80 4878 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4879 return ret;
1da177e4
LT		 4880}
4881
4882static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4883{
202b50dc 4884 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4885 struct nfs4_exception exception = {
4886 .inode = state->inode,
4887 };
202b50dc
TM		 4888 int err;
4889
4890 do {
42a2d13e
TM		 4891 /* Cache the lock if possible... */
4892 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4893 return 0;
afe6c27c 4894 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4895 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4896 break;
4897 nfs4_handle_exception(server, err, &exception);
4898 } while (exception.retry);
4899 return err;
1da177e4
LT		 4900}
4901
4902static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4903{
202b50dc 4904 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4905 struct nfs4_exception exception = {
4906 .inode = state->inode,
4907 };
202b50dc
TM		 4908 int err;
4909
6bfc93ef
TM		 4910 err = nfs4_set_lock_state(state, request);
4911 if (err != 0)
4912 return err;
202b50dc 4913 do {
42a2d13e
TM		 4914 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4915 return 0;
afe6c27c 4916 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4917 switch (err) {
4918 default:
4919 goto out;
4920 case -NFS4ERR_GRACE:
4921 case -NFS4ERR_DELAY:
4922 nfs4_handle_exception(server, err, &exception);
4923 err = 0;
4924 }
202b50dc 4925 } while (exception.retry);
a9ed2e25 4926out:
202b50dc 4927 return err;
1da177e4
LT		 4928}
4929
f062eb6c 4930#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 4931/**
4932 * nfs41_check_expired_locks - possibly free a lock stateid
4933 *
4934 * @state: NFSv4 state for an inode
4935 *
4936 * Returns NFS_OK if recovery for this stateid is now finished.
4937 * Otherwise a negative NFS4ERR value is returned.
4938 */
b01dd1d8 4939static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4940{
eb64cf96 4941 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 4942 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4943 struct nfs_server *server = NFS_SERVER(state->inode);
4944
b01dd1d8 4945 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 4946 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 4947 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4948 if (status != NFS_OK) {
3e60ffdd
CL		 4949 /* Free the stateid unless the server
4950 * informs us the stateid is unrecognized. */
89af2739
CL		 4951 if (status != -NFS4ERR_BAD_STATEID)
4952 nfs41_free_stateid(server,
4953 &lsp->ls_stateid);
795a88c9 4954 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 4955 ret = status;
4956 }
4957 }
4958 };
4959
4960 return ret;
4961}
4962
4963static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4964{
4965 int status = NFS_OK;
4966
4967 if (test_bit(LK_STATE_IN_USE, &state->flags))
4968 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 4969 if (status != NFS_OK)
4970 status = nfs4_lock_expired(state, request);
4971 return status;
f062eb6c
BS		 4972}
4973#endif
4974
1da177e4
LT		 4975static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4976{
9a99af49 4977 struct nfs4_state_owner *sp = state->owner;
19e03c57 4978 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4979 unsigned char fl_flags = request->fl_flags;
9a99af49 4980 unsigned int seq;
8e469ebd 4981 int status = -ENOLCK;
1da177e4 4982
8e469ebd
TM		 4983 if ((fl_flags & FL_POSIX) &&
4984 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4985 goto out;
6bfc93ef 4986 /* Is this a delegated open? */
6bfc93ef
TM		 4987 status = nfs4_set_lock_state(state, request);
4988 if (status != 0)
4989 goto out;
01c3b861
TM		 4990 request->fl_flags |= FL_ACCESS;
4991 status = do_vfs_lock(request->fl_file, request);
4992 if (status < 0)
4993 goto out;
19e03c57 4994 down_read(&nfsi->rwsem);
01c3b861 4995 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4996 /* Yes: cache locks! */
01c3b861 4997 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4998 request->fl_flags = fl_flags & ~FL_SLEEP;
4999 status = do_vfs_lock(request->fl_file, request);
5000 goto out_unlock;
01c3b861 5001 }
9a99af49
TM		 5002 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5003 up_read(&nfsi->rwsem);
afe6c27c 5004 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5005 if (status != 0)
9a99af49
TM		 5006 goto out;
5007 down_read(&nfsi->rwsem);
5008 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5009 status = -NFS4ERR_DELAY;
01c3b861 5010 goto out_unlock;
9a99af49 5011 }
6bfc93ef 5012 /* Note: we always want to sleep here! */
01c3b861 5013 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5014 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5015 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5016 "manager!\n", __func__);
01c3b861 5017out_unlock:
19e03c57 5018 up_read(&nfsi->rwsem);
01c3b861
TM		 5019out:
5020 request->fl_flags = fl_flags;
1da177e4
LT		 5021 return status;
5022}
5023
5024static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5025{
a1d0b5ee
TM		 5026 struct nfs4_exception exception = {
5027 .state = state,
05ffe24f 5028 .inode = state->inode,
a1d0b5ee 5029 };
1da177e4
LT		 5030 int err;
5031
5032 do {
965b5d67
TM		 5033 err = _nfs4_proc_setlk(state, cmd, request);
5034 if (err == -NFS4ERR_DENIED)
5035 err = -EAGAIN;
1da177e4 5036 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5037 err, &exception);
1da177e4
LT		 5038 } while (exception.retry);
5039 return err;
5040}
5041
5042static int
5043nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5044{
5045 struct nfs_open_context *ctx;
5046 struct nfs4_state *state;
5047 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5048 int status;
5049
5050 /* verify open state */
cd3758e3 5051 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5052 state = ctx->state;
5053
5054 if (request->fl_start < 0 || request->fl_end < 0)
5055 return -EINVAL;
5056
d953126a
TM		 5057 if (IS_GETLK(cmd)) {
5058 if (state != NULL)
5059 return nfs4_proc_getlk(state, F_GETLK, request);
5060 return 0;
5061 }
1da177e4
LT		 5062
5063 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5064 return -EINVAL;
5065
d953126a
TM		 5066 if (request->fl_type == F_UNLCK) {
5067 if (state != NULL)
5068 return nfs4_proc_unlck(state, cmd, request);
5069 return 0;
5070 }
1da177e4 5071
d953126a
TM		 5072 if (state == NULL)
5073 return -ENOLCK;
55725513
TM		 5074 /*
5075 * Don't rely on the VFS having checked the file open mode,
5076 * since it won't do this for flock() locks.
5077 */
f44106e2 5078 switch (request->fl_type) {
55725513
TM		 5079 case F_RDLCK:
5080 if (!(filp->f_mode & FMODE_READ))
5081 return -EBADF;
5082 break;
5083 case F_WRLCK:
5084 if (!(filp->f_mode & FMODE_WRITE))
5085 return -EBADF;
5086 }
5087
1da177e4
LT		 5088 do {
5089 status = nfs4_proc_setlk(state, cmd, request);
5090 if ((status != -EAGAIN) || IS_SETLK(cmd))
5091 break;
5092 timeout = nfs4_set_lock_task_retry(timeout);
5093 status = -ERESTARTSYS;
5094 if (signalled())
5095 break;
5096 } while(status < 0);
1da177e4
LT		 5097 return status;
5098}
5099
888e694c
TM		 5100int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
5101{
5102 struct nfs_server *server = NFS_SERVER(state->inode);
5103 struct nfs4_exception exception = { };
5104 int err;
5105
5106 err = nfs4_set_lock_state(state, fl);
5107 if (err != 0)
5108 goto out;
5109 do {
afe6c27c 5110 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 5111 switch (err) {
5112 default:
a030889a
WAA		 5113 printk(KERN_ERR "NFS: %s: unhandled error "
5114 "%d.\n", __func__, err);
d5122201 5115 case 0:
965b5d67 5116 case -ESTALE:
d5122201 5117 goto out;
d5122201 5118 case -NFS4ERR_STALE_CLIENTID:
965b5d67 5119 case -NFS4ERR_STALE_STATEID:
37380e42
TM		 5120 set_bit(NFS_DELEGATED_STATE, &state->flags);
5121 case -NFS4ERR_EXPIRED:
0400a6b0 5122 nfs4_schedule_lease_recovery(server->nfs_client);
37380e42 5123 err = -EAGAIN;
0400a6b0 5124 goto out;
74e7bb73
RL		 5125 case -NFS4ERR_BADSESSION:
5126 case -NFS4ERR_BADSLOT:
5127 case -NFS4ERR_BAD_HIGH_SLOT:
5128 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
5129 case -NFS4ERR_DEADSESSION:
37380e42 5130 set_bit(NFS_DELEGATED_STATE, &state->flags);
9f594791 5131 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
37380e42 5132 err = -EAGAIN;
d5122201 5133 goto out;
a1d0b5ee 5134 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 5135 case -NFS4ERR_ADMIN_REVOKED:
5136 case -NFS4ERR_BAD_STATEID:
5137 case -NFS4ERR_OPENMODE:
0400a6b0 5138 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 5139 err = 0;
5140 goto out;
5141 case -ENOMEM:
5142 case -NFS4ERR_DENIED:
5143 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
5144 err = 0;
5145 goto out;
d5122201 5146 }
37380e42 5147 set_bit(NFS_DELEGATED_STATE, &state->flags);
888e694c
TM		 5148 err = nfs4_handle_exception(server, err, &exception);
5149 } while (exception.retry);
5150out:
5151 return err;
5152}
6b3b5496 5153
cf470c3e
TM		 5154struct nfs_release_lockowner_data {
5155 struct nfs4_lock_state *lsp;
5ae67c4f 5156 struct nfs_server *server;
cf470c3e
TM		 5157 struct nfs_release_lockowner_args args;
5158};
5159
d3c7b7cc
TM		 5160static void nfs4_release_lockowner_release(void *calldata)
5161{
cf470c3e 5162 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5163 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5164 kfree(calldata);
5165}
5166
17280175 5167static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 5168 .rpc_release = nfs4_release_lockowner_release,
5169};
5170
cf470c3e 5171int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 5172{
5173 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 5174 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5175 struct rpc_message msg = {
5176 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5177 };
5178
5179 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5180 return -EINVAL;
5181 data = kmalloc(sizeof(*data), GFP_NOFS);
5182 if (!data)
5183 return -ENOMEM;
5184 data->lsp = lsp;
5ae67c4f 5185 data->server = server;
cf470c3e
TM		 5186 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5187 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5188 data->args.lock_owner.s_dev = server->s_dev;
5189 msg.rpc_argp = &data->args;
5190 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5191 return 0;
d3c7b7cc
TM		 5192}
5193
aa1870af
BF		 5194#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5195
64c2ce8b
AK		 5196static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5197 const void *buf, size_t buflen,
5198 int flags, int type)
6b3b5496 5199{
64c2ce8b
AK		 5200 if (strcmp(key, "") != 0)
5201 return -EINVAL;
4b580ee3 5202
64c2ce8b 5203 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5204}
5205
64c2ce8b
AK		 5206static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5207 void *buf, size_t buflen, int type)
6b3b5496 5208{
64c2ce8b
AK		 5209 if (strcmp(key, "") != 0)
5210 return -EINVAL;
aa1870af 5211
64c2ce8b 5212 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5213}
5214
64c2ce8b
AK		 5215static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5216 size_t list_len, const char *name,
5217 size_t name_len, int type)
6b3b5496 5218{
64c2ce8b 5219 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5220
096455a2
BF		 5221 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5222 return 0;
64c2ce8b
AK		 5223
5224 if (list && len <= list_len)
5225 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5226 return len;
6b3b5496
BF		 5227}
5228
533eb461
AA		 5229/*
5230 * nfs_fhget will use either the mounted_on_fileid or the fileid
5231 */
69aaaae1
TM		 5232static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5233{
533eb461
AA		 5234 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5235 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5236 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5237 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5238 return;
5239
5240 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5241 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5242 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5243 fattr->nlink = 2;
5244}
5245
f05d147f
BS		 5246static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5247 const struct qstr *name,
5248 struct nfs4_fs_locations *fs_locations,
5249 struct page *page)
683b57b4
TM		 5250{
5251 struct nfs_server *server = NFS_SERVER(dir);
5252 u32 bitmask[2] = {
361e624f 5253 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5254 };
5255 struct nfs4_fs_locations_arg args = {
5256 .dir_fh = NFS_FH(dir),
c228fd3a 5257 .name = name,
683b57b4
TM		 5258 .page = page,
5259 .bitmask = bitmask,
5260 };
22958463
BH		 5261 struct nfs4_fs_locations_res res = {
5262 .fs_locations = fs_locations,
5263 };
683b57b4
TM		 5264 struct rpc_message msg = {
5265 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5266 .rpc_argp = &args,
22958463 5267 .rpc_resp = &res,
683b57b4
TM		 5268 };
5269 int status;
5270
3110ff80 5271 dprintk("%s: start\n", __func__);
533eb461
AA		 5272
5273 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5274 * is not supported */
5275 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5276 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5277 else
5278 bitmask[0] |= FATTR4_WORD0_FILEID;
5279
c228fd3a 5280 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5281 fs_locations->server = server;
830b8e33 5282 fs_locations->nlocations = 0;
f05d147f 5283 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5284 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5285 return status;
5286}
5287
f05d147f
BS		 5288int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5289 const struct qstr *name,
5290 struct nfs4_fs_locations *fs_locations,
5291 struct page *page)
db0a9593
BS		 5292{
5293 struct nfs4_exception exception = { };
5294 int err;
5295 do {
5296 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5297 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5298 &exception);
5299 } while (exception.retry);
5300 return err;
5301}
5302
5a5ea0d4
BS		 5303static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5304{
5305 int status;
5306 struct nfs4_secinfo_arg args = {
5307 .dir_fh = NFS_FH(dir),
5308 .name = name,
5309 };
5310 struct nfs4_secinfo_res res = {
5311 .flavors = flavors,
5312 };
5313 struct rpc_message msg = {
5314 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5315 .rpc_argp = &args,
5316 .rpc_resp = &res,
5317 };
5318
5319 dprintk("NFS call secinfo %s\n", name->name);
5320 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5321 dprintk("NFS reply secinfo: %d\n", status);
5322 return status;
5323}
5324
72de53ec
BS		 5325int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5326 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5327{
5328 struct nfs4_exception exception = { };
5329 int err;
5330 do {
5331 err = nfs4_handle_exception(NFS_SERVER(dir),
5332 _nfs4_proc_secinfo(dir, name, flavors),
5333 &exception);
5334 } while (exception.retry);
5335 return err;
5336}
5337
557134a3 5338#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5339/*
5340 * Check the exchange flags returned by the server for invalid flags, having
5341 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5342 * DS flags set.
5343 */
5344static int nfs4_check_cl_exchange_flags(u32 flags)
5345{
5346 if (flags & ~EXCHGID4_FLAG_MASK_R)
5347 goto out_inval;
5348 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5349 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5350 goto out_inval;
5351 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5352 goto out_inval;
5353 return NFS_OK;
5354out_inval:
5355 return -NFS4ERR_INVAL;
5356}
5357
78fe0f41 5358static bool
79d4e1f0
CL		 5359nfs41_same_server_scope(struct nfs41_server_scope *a,
5360 struct nfs41_server_scope *b)
78fe0f41
WAA		 5361{
5362 if (a->server_scope_sz == b->server_scope_sz &&
5363 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5364 return true;
5365
5366 return false;
5367}
5368
7c44f1ae
WAA		 5369/*
5370 * nfs4_proc_bind_conn_to_session()
5371 *
5372 * The 4.1 client currently uses the same TCP connection for the
5373 * fore and backchannel.
5374 */
2cf047c9 5375int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5376{
5377 int status;
5378 struct nfs41_bind_conn_to_session_res res;
5379 struct rpc_message msg = {
5380 .rpc_proc =
5381 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5382 .rpc_argp = clp,
5383 .rpc_resp = &res,
2cf047c9 5384 .rpc_cred = cred,
7c44f1ae
WAA		 5385 };
5386
5387 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5388
5389 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5390 if (unlikely(res.session == NULL)) {
5391 status = -ENOMEM;
5392 goto out;
5393 }
5394
5395 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5396 if (status == 0) {
5397 if (memcmp(res.session->sess_id.data,
5398 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5399 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5400 status = -EIO;
5401 goto out_session;
5402 }
5403 if (res.dir != NFS4_CDFS4_BOTH) {
5404 dprintk("NFS: %s: Unexpected direction from server\n",
5405 __func__);
5406 status = -EIO;
5407 goto out_session;
5408 }
5409 if (res.use_conn_in_rdma_mode) {
5410 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5411 __func__);
5412 status = -EIO;
5413 goto out_session;
5414 }
5415 }
5416out_session:
5417 kfree(res.session);
5418out:
5419 dprintk("<-- %s status= %d\n", __func__, status);
5420 return status;
5421}
5422
99fe60d0
BH		 5423/*
5424 * nfs4_proc_exchange_id()
5425 *
6bbb4ae8
CL		 5426 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5427 *
99fe60d0
BH		 5428 * Since the clientid has expired, all compounds using sessions
5429 * associated with the stale clientid will be returning
5430 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5431 * be in some phase of session reset.
5432 */
4d643d1d 5433int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5434{
5435 nfs4_verifier verifier;
5436 struct nfs41_exchange_id_args args = {
cd93710e 5437 .verifier = &verifier,
99fe60d0 5438 .client = clp,
357f54d6 5439 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5440 };
5441 struct nfs41_exchange_id_res res = {
32b01310 5442 0
99fe60d0
BH		 5443 };
5444 int status;
5445 struct rpc_message msg = {
5446 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5447 .rpc_argp = &args,
5448 .rpc_resp = &res,
5449 .rpc_cred = cred,
5450 };
99fe60d0 5451
f092075d 5452 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5453 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5454 sizeof(args.id));
6bbb4ae8
CL		 5455 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5456 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5457 args.id_len, args.id);
99fe60d0 5458
acdeb69d 5459 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5460 GFP_NOFS);
acdeb69d 5461 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5462 status = -ENOMEM;
5463 goto out;
5464 }
78fe0f41 5465
79d4e1f0 5466 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5467 GFP_NOFS);
177313f1 5468 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5469 status = -ENOMEM;
acdeb69d 5470 goto out_server_owner;
abe9a6d5 5471 }
78fe0f41 5472
bbafffd2 5473 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5474 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5475 status = -ENOMEM;
5476 goto out_server_scope;
5477 }
5478
1bd714f2 5479 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5480 if (status == 0)
32b01310 5481 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5482
acdeb69d 5483 if (status == 0) {
32b01310
TM		 5484 clp->cl_clientid = res.clientid;
5485 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5486 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5487 clp->cl_seqid = res.seqid;
5488
acdeb69d
CL		 5489 kfree(clp->cl_serverowner);
5490 clp->cl_serverowner = res.server_owner;
5491 res.server_owner = NULL;
78fe0f41 5492
7d2ed9ac 5493 /* use the most recent implementation id */
59155546
CL		 5494 kfree(clp->cl_implid);
5495 clp->cl_implid = res.impl_id;
7d2ed9ac 5496
177313f1 5497 if (clp->cl_serverscope != NULL &&
79d4e1f0 5498 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5499 res.server_scope)) {
5500 dprintk("%s: server_scope mismatch detected\n",
5501 __func__);
5502 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5503 kfree(clp->cl_serverscope);
5504 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5505 }
5506
177313f1 5507 if (clp->cl_serverscope == NULL) {
79d4e1f0 5508 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5509 goto out;
5510 }
32b01310
TM		 5511 } else
5512 kfree(res.impl_id);
7d2ed9ac 5513
acdeb69d
CL		 5514out_server_owner:
5515 kfree(res.server_owner);
7d2ed9ac 5516out_server_scope:
abe9a6d5
WAA		 5517 kfree(res.server_scope);
5518out:
177313f1 5519 if (clp->cl_implid != NULL)
6bbb4ae8 5520 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5521 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5522 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5523 clp->cl_implid->date.seconds,
5524 clp->cl_implid->date.nseconds);
6bbb4ae8 5525 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5526 return status;
5527}
5528
66245539
TM		 5529static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5530 struct rpc_cred *cred)
5531{
5532 struct rpc_message msg = {
5533 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5534 .rpc_argp = clp,
5535 .rpc_cred = cred,
5536 };
5537 int status;
5538
5539 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5540 if (status)
02c67525 5541 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5542 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5543 return status;
5544}
5545
5546static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5547 struct rpc_cred *cred)
5548{
5549 unsigned int loop;
5550 int ret;
5551
5552 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5553 ret = _nfs4_proc_destroy_clientid(clp, cred);
5554 switch (ret) {
5555 case -NFS4ERR_DELAY:
5556 case -NFS4ERR_CLIENTID_BUSY:
5557 ssleep(1);
5558 break;
5559 default:
5560 return ret;
5561 }
5562 }
5563 return 0;
5564}
5565
5566int nfs4_destroy_clientid(struct nfs_client *clp)
5567{
5568 struct rpc_cred *cred;
5569 int ret = 0;
5570
5571 if (clp->cl_mvops->minor_version < 1)
5572 goto out;
5573 if (clp->cl_exchange_flags == 0)
5574 goto out;
05f4c350
CL		 5575 if (clp->cl_preserve_clid)
5576 goto out;
66245539
TM		 5577 cred = nfs4_get_exchange_id_cred(clp);
5578 ret = nfs4_proc_destroy_clientid(clp, cred);
5579 if (cred)
5580 put_rpccred(cred);
5581 switch (ret) {
5582 case 0:
5583 case -NFS4ERR_STALE_CLIENTID:
5584 clp->cl_exchange_flags = 0;
5585 }
5586out:
5587 return ret;
5588}
5589
2050f0cc
AA		 5590struct nfs4_get_lease_time_data {
5591 struct nfs4_get_lease_time_args *args;
5592 struct nfs4_get_lease_time_res *res;
5593 struct nfs_client *clp;
5594};
5595
5596static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5597 void *calldata)
5598{
2050f0cc
AA		 5599 struct nfs4_get_lease_time_data *data =
5600 (struct nfs4_get_lease_time_data *)calldata;
5601
5602 dprintk("--> %s\n", __func__);
5603 /* just setup sequence, do not trigger session recovery
5604 since we're invoked within one */
d9afbd1b
TM		 5605 nfs41_setup_sequence(data->clp->cl_session,
5606 &data->args->la_seq_args,
5607 &data->res->lr_seq_res,
5608 task);
2050f0cc
AA		 5609 dprintk("<-- %s\n", __func__);
5610}
5611
5612/*
5613 * Called from nfs4_state_manager thread for session setup, so don't recover
5614 * from sequence operation or clientid errors.
5615 */
5616static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5617{
5618 struct nfs4_get_lease_time_data *data =
5619 (struct nfs4_get_lease_time_data *)calldata;
5620
5621 dprintk("--> %s\n", __func__);
14516c3a
TM		 5622 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5623 return;
2050f0cc
AA		 5624 switch (task->tk_status) {
5625 case -NFS4ERR_DELAY:
5626 case -NFS4ERR_GRACE:
5627 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5628 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5629 task->tk_status = 0;
a8a4ae3a
AA		 5630 /* fall through */
5631 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5632 rpc_restart_call_prepare(task);
2050f0cc
AA		 5633 return;
5634 }
2050f0cc
AA		 5635 dprintk("<-- %s\n", __func__);
5636}
5637
17280175 5638static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5639 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5640 .rpc_call_done = nfs4_get_lease_time_done,
5641};
5642
5643int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5644{
5645 struct rpc_task *task;
5646 struct nfs4_get_lease_time_args args;
5647 struct nfs4_get_lease_time_res res = {
5648 .lr_fsinfo = fsinfo,
5649 };
5650 struct nfs4_get_lease_time_data data = {
5651 .args = &args,
5652 .res = &res,
5653 .clp = clp,
5654 };
5655 struct rpc_message msg = {
5656 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5657 .rpc_argp = &args,
5658 .rpc_resp = &res,
5659 };
5660 struct rpc_task_setup task_setup = {
5661 .rpc_client = clp->cl_rpcclient,
5662 .rpc_message = &msg,
5663 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5664 .callback_data = &data,
5665 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5666 };
5667 int status;
5668
9d12b216 5669 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5670 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5671 dprintk("--> %s\n", __func__);
5672 task = rpc_run_task(&task_setup);
5673
5674 if (IS_ERR(task))
5675 status = PTR_ERR(task);
5676 else {
5677 status = task->tk_status;
5678 rpc_put_task(task);
5679 }
5680 dprintk("<-- %s return %d\n", __func__, status);
5681
5682 return status;
5683}
5684
fc931582
AA		 5685/*
5686 * Initialize the values to be used by the client in CREATE_SESSION
5687 * If nfs4_init_session set the fore channel request and response sizes,
5688 * use them.
5689 *
5690 * Set the back channel max_resp_sz_cached to zero to force the client to
5691 * always set csa_cachethis to FALSE because the current implementation
5692 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5693 */
5694static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5695{
5696 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5697 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5698 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5699
5700 if (mxrqst_sz == 0)
5701 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5702 if (mxresp_sz == 0)
5703 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5704 /* Fore channel attributes */
fc931582
AA		 5705 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5706 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5707 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5708 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5709
5710 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5711 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5712 __func__,
5713 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5714 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5715
5716 /* Back channel attributes */
fc931582
AA		 5717 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5718 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5719 args->bc_attrs.max_resp_sz_cached = 0;
5720 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5721 args->bc_attrs.max_reqs = 1;
5722
5723 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5724 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5725 __func__,
5726 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5727 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5728 args->bc_attrs.max_reqs);
5729}
5730
43c2e885 5731static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5732{
43c2e885
BF		 5733 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5734 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5735
43c2e885
BF		 5736 if (rcvd->max_resp_sz > sent->max_resp_sz)
5737 return -EINVAL;
5738 /*
5739 * Our requested max_ops is the minimum we need; we're not
5740 * prepared to break up compounds into smaller pieces than that.
5741 * So, no point even trying to continue if the server won't
5742 * cooperate:
5743 */
5744 if (rcvd->max_ops < sent->max_ops)
5745 return -EINVAL;
5746 if (rcvd->max_reqs == 0)
5747 return -EINVAL;
b4b9a0c1
VG		 5748 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5749 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5750 return 0;
8d35301d
AA		 5751}
5752
43c2e885
BF		 5753static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5754{
5755 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5756 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5757
43c2e885
BF		 5758 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5759 return -EINVAL;
5760 if (rcvd->max_resp_sz < sent->max_resp_sz)
5761 return -EINVAL;
5762 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5763 return -EINVAL;
5764 /* These would render the backchannel useless: */
b4b9a0c1 5765 if (rcvd->max_ops != sent->max_ops)
43c2e885 5766 return -EINVAL;
b4b9a0c1 5767 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5768 return -EINVAL;
5769 return 0;
5770}
8d35301d 5771
8d35301d
AA		 5772static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5773 struct nfs4_session *session)
5774{
43c2e885 5775 int ret;
8d35301d 5776
43c2e885
BF		 5777 ret = nfs4_verify_fore_channel_attrs(args, session);
5778 if (ret)
5779 return ret;
5780 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5781}
5782
848f5bda
TM		 5783static int _nfs4_proc_create_session(struct nfs_client *clp,
5784 struct rpc_cred *cred)
fc931582
AA		 5785{
5786 struct nfs4_session *session = clp->cl_session;
5787 struct nfs41_create_session_args args = {
5788 .client = clp,
5789 .cb_program = NFS4_CALLBACK,
5790 };
5791 struct nfs41_create_session_res res = {
5792 .client = clp,
5793 };
5794 struct rpc_message msg = {
5795 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5796 .rpc_argp = &args,
5797 .rpc_resp = &res,
848f5bda 5798 .rpc_cred = cred,
fc931582
AA		 5799 };
5800 int status;
5801
5802 nfs4_init_channel_attrs(&args);
0f91421e 5803 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5804
1bd714f2 5805 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5806
43095d39 5807 if (!status) {
8d35301d
AA		 5808 /* Verify the session's negotiated channel_attrs values */
5809 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5810 /* Increment the clientid slot sequence id */
5811 clp->cl_seqid++;
5812 }
5813
5814 return status;
5815}
5816
5817/*
5818 * Issues a CREATE_SESSION operation to the server.
5819 * It is the responsibility of the caller to verify the session is
5820 * expired before calling this routine.
5821 */
848f5bda 5822int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5823{
5824 int status;
5825 unsigned *ptr;
fc931582
AA		 5826 struct nfs4_session *session = clp->cl_session;
5827
5828 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5829
848f5bda 5830 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5831 if (status)
5832 goto out;
5833
aacd5537
AA		 5834 /* Init or reset the session slot tables */
5835 status = nfs4_setup_session_slot_tables(session);
5836 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5837 if (status)
5838 goto out;
5839
5840 ptr = (unsigned *)&session->sess_id.data[0];
5841 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5842 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5843out:
5844 dprintk("<-- %s\n", __func__);
5845 return status;
5846}
5847
0f3e66c6
AA		 5848/*
5849 * Issue the over-the-wire RPC DESTROY_SESSION.
5850 * The caller must serialize access to this routine.
5851 */
848f5bda
TM		 5852int nfs4_proc_destroy_session(struct nfs4_session *session,
5853 struct rpc_cred *cred)
0f3e66c6 5854{
848f5bda
TM		 5855 struct rpc_message msg = {
5856 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5857 .rpc_argp = session,
5858 .rpc_cred = cred,
5859 };
0f3e66c6 5860 int status = 0;
0f3e66c6
AA		 5861
5862 dprintk("--> nfs4_proc_destroy_session\n");
5863
5864 /* session is still being setup */
5865 if (session->clp->cl_cons_state != NFS_CS_READY)
5866 return status;
5867
1bd714f2 5868 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5869
5870 if (status)
08106ac7 5871 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5872 "Session has been destroyed regardless...\n", status);
5873
5874 dprintk("<-- nfs4_proc_destroy_session\n");
5875 return status;
5876}
5877
fc01cea9
AA		 5878/*
5879 * Renew the cl_session lease.
5880 */
d5f8d3fe
TM		 5881struct nfs4_sequence_data {
5882 struct nfs_client *clp;
5883 struct nfs4_sequence_args args;
5884 struct nfs4_sequence_res res;
5885};
5886
dc96aef9
AB		 5887static void nfs41_sequence_release(void *data)
5888{
d5f8d3fe
TM		 5889 struct nfs4_sequence_data *calldata = data;
5890 struct nfs_client *clp = calldata->clp;
dc96aef9 5891
7135840f
AB		 5892 if (atomic_read(&clp->cl_count) > 1)
5893 nfs4_schedule_state_renewal(clp);
5894 nfs_put_client(clp);
d5f8d3fe 5895 kfree(calldata);
dc96aef9
AB		 5896}
5897
aa5190d0
TM		 5898static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5899{
5900 switch(task->tk_status) {
5901 case -NFS4ERR_DELAY:
aa5190d0
TM		 5902 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5903 return -EAGAIN;
5904 default:
0400a6b0 5905 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5906 }
5907 return 0;
5908}
5909
dc96aef9 5910static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5911{
d5f8d3fe
TM		 5912 struct nfs4_sequence_data *calldata = data;
5913 struct nfs_client *clp = calldata->clp;
fc01cea9 5914
14516c3a
TM		 5915 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5916 return;
fc01cea9
AA		 5917
5918 if (task->tk_status < 0) {
5919 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5920 if (atomic_read(&clp->cl_count) == 1)
5921 goto out;
fc01cea9 5922
aa5190d0
TM		 5923 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5924 rpc_restart_call_prepare(task);
fc01cea9
AA		 5925 return;
5926 }
5927 }
fc01cea9 5928 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5929out:
fc01cea9
AA		 5930 dprintk("<-- %s\n", __func__);
5931}
5932
5933static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5934{
d5f8d3fe
TM		 5935 struct nfs4_sequence_data *calldata = data;
5936 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5937 struct nfs4_sequence_args *args;
5938 struct nfs4_sequence_res *res;
5939
fc01cea9
AA		 5940 args = task->tk_msg.rpc_argp;
5941 res = task->tk_msg.rpc_resp;
5942
d9afbd1b 5943 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 5944}
5945
5946static const struct rpc_call_ops nfs41_sequence_ops = {
5947 .rpc_call_done = nfs41_sequence_call_done,
5948 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5949 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5950};
5951
8fe72bac
TM		 5952static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
5953 struct rpc_cred *cred,
5954 bool is_privileged)
fc01cea9 5955{
d5f8d3fe 5956 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5957 struct rpc_message msg = {
5958 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5959 .rpc_cred = cred,
5960 };
71ac6da9
TM		 5961 struct rpc_task_setup task_setup_data = {
5962 .rpc_client = clp->cl_rpcclient,
5963 .rpc_message = &msg,
8fe72bac 5964 .callback_ops = &nfs41_sequence_ops,
71ac6da9
TM		 5965 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5966 };
fc01cea9 5967
7135840f 5968 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5969 return ERR_PTR(-EIO);
dfb4f309 5970 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5971 if (calldata == NULL) {
7135840f 5972 nfs_put_client(clp);
71ac6da9 5973 return ERR_PTR(-ENOMEM);
fc01cea9 5974 }
9d12b216 5975 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 5976 if (is_privileged)
5977 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 5978 msg.rpc_argp = &calldata->args;
5979 msg.rpc_resp = &calldata->res;
5980 calldata->clp = clp;
71ac6da9 5981 task_setup_data.callback_data = calldata;
fc01cea9 5982
71ac6da9
TM		 5983 return rpc_run_task(&task_setup_data);
5984}
5985
2f60ea6b 5986static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 5987{
5988 struct rpc_task *task;
5989 int ret = 0;
5990
2f60ea6b
TM		 5991 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5992 return 0;
8fe72bac 5993 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 5994 if (IS_ERR(task))
5995 ret = PTR_ERR(task);
5996 else
bf294b41 5997 rpc_put_task_async(task);
71ac6da9
TM		 5998 dprintk("<-- %s status=%d\n", __func__, ret);
5999 return ret;
6000}
6001
6002static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6003{
6004 struct rpc_task *task;
6005 int ret;
6006
8fe72bac 6007 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6008 if (IS_ERR(task)) {
6009 ret = PTR_ERR(task);
6010 goto out;
6011 }
6012 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6013 if (!ret) {
6014 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6015
6016 if (task->tk_status == 0)
6017 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6018 ret = task->tk_status;
b4410c2f 6019 }
71ac6da9
TM		 6020 rpc_put_task(task);
6021out:
6022 dprintk("<-- %s status=%d\n", __func__, ret);
6023 return ret;
fc01cea9
AA		 6024}
6025
fce5c838
RL		 6026struct nfs4_reclaim_complete_data {
6027 struct nfs_client *clp;
6028 struct nfs41_reclaim_complete_args arg;
6029 struct nfs41_reclaim_complete_res res;
6030};
6031
6032static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6033{
6034 struct nfs4_reclaim_complete_data *calldata = data;
6035
d9afbd1b
TM		 6036 nfs41_setup_sequence(calldata->clp->cl_session,
6037 &calldata->arg.seq_args,
6038 &calldata->res.seq_res,
6039 task);
fce5c838
RL		 6040}
6041
aa5190d0
TM		 6042static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6043{
6044 switch(task->tk_status) {
6045 case 0:
6046 case -NFS4ERR_COMPLETE_ALREADY:
6047 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6048 break;
6049 case -NFS4ERR_DELAY:
aa5190d0 6050 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6051 /* fall through */
6052 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6053 return -EAGAIN;
6054 default:
0400a6b0 6055 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6056 }
6057 return 0;
6058}
6059
fce5c838
RL		 6060static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6061{
6062 struct nfs4_reclaim_complete_data *calldata = data;
6063 struct nfs_client *clp = calldata->clp;
6064 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6065
6066 dprintk("--> %s\n", __func__);
14516c3a
TM		 6067 if (!nfs41_sequence_done(task, res))
6068 return;
fce5c838 6069
aa5190d0
TM		 6070 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6071 rpc_restart_call_prepare(task);
6072 return;
6073 }
fce5c838
RL		 6074 dprintk("<-- %s\n", __func__);
6075}
6076
6077static void nfs4_free_reclaim_complete_data(void *data)
6078{
6079 struct nfs4_reclaim_complete_data *calldata = data;
6080
6081 kfree(calldata);
6082}
6083
6084static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6085 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6086 .rpc_call_done = nfs4_reclaim_complete_done,
6087 .rpc_release = nfs4_free_reclaim_complete_data,
6088};
6089
6090/*
6091 * Issue a global reclaim complete.
6092 */
6093static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
6094{
6095 struct nfs4_reclaim_complete_data *calldata;
6096 struct rpc_task *task;
6097 struct rpc_message msg = {
6098 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
6099 };
6100 struct rpc_task_setup task_setup_data = {
6101 .rpc_client = clp->cl_rpcclient,
6102 .rpc_message = &msg,
6103 .callback_ops = &nfs4_reclaim_complete_call_ops,
6104 .flags = RPC_TASK_ASYNC,
6105 };
6106 int status = -ENOMEM;
6107
6108 dprintk("--> %s\n", __func__);
8535b2be 6109 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6110 if (calldata == NULL)
6111 goto out;
6112 calldata->clp = clp;
6113 calldata->arg.one_fs = 0;
fce5c838 6114
9d12b216 6115 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6116 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6117 msg.rpc_argp = &calldata->arg;
6118 msg.rpc_resp = &calldata->res;
6119 task_setup_data.callback_data = calldata;
6120 task = rpc_run_task(&task_setup_data);
acf82b85 6121 if (IS_ERR(task)) {
fce5c838 6122 status = PTR_ERR(task);
acf82b85
DC		 6123 goto out;
6124 }
c34c32ea
AA		 6125 status = nfs4_wait_for_completion_rpc_task(task);
6126 if (status == 0)
6127 status = task->tk_status;
fce5c838 6128 rpc_put_task(task);
acf82b85 6129 return 0;
fce5c838
RL		 6130out:
6131 dprintk("<-- %s status=%d\n", __func__, status);
6132 return status;
6133}
b1f69b75
AA		 6134
6135static void
6136nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
6137{
6138 struct nfs4_layoutget *lgp = calldata;
c31663d4 6139 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 6140 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 6141
6142 dprintk("--> %s\n", __func__);
c31663d4
FI		 6143 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
6144 * right now covering the LAYOUTGET we are about to send.
6145 * However, that is not so catastrophic, and there seems
6146 * to be no way to prevent it completely.
6147 */
6ba7db34 6148 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 6149 &lgp->res.seq_res, task))
b1f69b75 6150 return;
cf7d63f1
FI		 6151 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
6152 NFS_I(lgp->args.inode)->layout,
6153 lgp->args.ctx->state)) {
6154 rpc_exit(task, NFS4_OK);
cf7d63f1 6155 }
b1f69b75
AA		 6156}
6157
6158static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
6159{
6160 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 6161 struct inode *inode = lgp->args.inode;
6162 struct nfs_server *server = NFS_SERVER(inode);
6163 struct pnfs_layout_hdr *lo;
6164 struct nfs4_state *state = NULL;
30005121 6165 unsigned long timeo, giveup;
b1f69b75
AA		 6166
6167 dprintk("--> %s\n", __func__);
6168
6ba7db34 6169 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 6170 goto out;
b1f69b75
AA		 6171
6172 switch (task->tk_status) {
6173 case 0:
ee314c2a 6174 goto out;
b1f69b75
AA		 6175 case -NFS4ERR_LAYOUTTRYLATER:
6176 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 6177 timeo = rpc_get_timeout(task->tk_client);
6178 giveup = lgp->args.timestamp + timeo;
6179 if (time_after(giveup, jiffies))
6180 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6181 break;
6182 case -NFS4ERR_EXPIRED:
6183 case -NFS4ERR_BAD_STATEID:
6184 spin_lock(&inode->i_lock);
6185 lo = NFS_I(inode)->layout;
6186 if (!lo || list_empty(&lo->plh_segs)) {
6187 spin_unlock(&inode->i_lock);
6188 /* If the open stateid was bad, then recover it. */
6189 state = lgp->args.ctx->state;
6190 } else {
6191 LIST_HEAD(head);
6192
6193 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6194 spin_unlock(&inode->i_lock);
6195 /* Mark the bad layout state as invalid, then
6196 * retry using the open stateid. */
6197 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6198 }
6199 }
ee314c2a
TM		 6200 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6201 rpc_restart_call_prepare(task);
6202out:
b1f69b75
AA		 6203 dprintk("<-- %s\n", __func__);
6204}
6205
8554116e
IK		 6206static size_t max_response_pages(struct nfs_server *server)
6207{
6208 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6209 return nfs_page_array_len(0, max_resp_sz);
6210}
6211
6212static void nfs4_free_pages(struct page **pages, size_t size)
6213{
6214 int i;
6215
6216 if (!pages)
6217 return;
6218
6219 for (i = 0; i < size; i++) {
6220 if (!pages[i])
6221 break;
6222 __free_page(pages[i]);
6223 }
6224 kfree(pages);
6225}
6226
6227static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6228{
6229 struct page **pages;
6230 int i;
6231
6232 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6233 if (!pages) {
6234 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6235 return NULL;
6236 }
6237
6238 for (i = 0; i < size; i++) {
6239 pages[i] = alloc_page(gfp_flags);
6240 if (!pages[i]) {
6241 dprintk("%s: failed to allocate page\n", __func__);
6242 nfs4_free_pages(pages, size);
6243 return NULL;
6244 }
6245 }
6246
6247 return pages;
6248}
6249
b1f69b75
AA		 6250static void nfs4_layoutget_release(void *calldata)
6251{
6252 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 6253 struct inode *inode = lgp->args.inode;
6254 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6255 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6256
6257 dprintk("--> %s\n", __func__);
8554116e 6258 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 6259 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 6260 put_nfs_open_context(lgp->args.ctx);
6261 kfree(calldata);
6262 dprintk("<-- %s\n", __func__);
6263}
6264
6265static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6266 .rpc_call_prepare = nfs4_layoutget_prepare,
6267 .rpc_call_done = nfs4_layoutget_done,
6268 .rpc_release = nfs4_layoutget_release,
6269};
6270
a0b0a6e3
TM		 6271struct pnfs_layout_segment *
6272nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 6273{
a47970ff
WAA		 6274 struct inode *inode = lgp->args.inode;
6275 struct nfs_server *server = NFS_SERVER(inode);
8554116e 6276 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6277 struct rpc_task *task;
6278 struct rpc_message msg = {
6279 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6280 .rpc_argp = &lgp->args,
6281 .rpc_resp = &lgp->res,
6282 };
6283 struct rpc_task_setup task_setup_data = {
6284 .rpc_client = server->client,
6285 .rpc_message = &msg,
6286 .callback_ops = &nfs4_layoutget_call_ops,
6287 .callback_data = lgp,
6288 .flags = RPC_TASK_ASYNC,
6289 };
a0b0a6e3 6290 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6291 int status = 0;
6292
6293 dprintk("--> %s\n", __func__);
6294
8554116e
IK		 6295 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6296 if (!lgp->args.layout.pages) {
6297 nfs4_layoutget_release(lgp);
a0b0a6e3 6298 return ERR_PTR(-ENOMEM);
8554116e
IK		 6299 }
6300 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 6301 lgp->args.timestamp = jiffies;
8554116e 6302
35124a09 6303 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6304 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6305 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 6306
6307 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
6308 pnfs_get_layout_hdr(NFS_I(inode)->layout);
6309
b1f69b75
AA		 6310 task = rpc_run_task(&task_setup_data);
6311 if (IS_ERR(task))
a0b0a6e3 6312 return ERR_CAST(task);
b1f69b75 6313 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6314 if (status == 0)
6315 status = task->tk_status;
085b7a45
WAA		 6316 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
6317 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 6318 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6319 rpc_put_task(task);
6320 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6321 if (status)
6322 return ERR_PTR(status);
6323 return lseg;
b1f69b75
AA		 6324}
6325
cbe82603
BH		 6326static void
6327nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6328{
6329 struct nfs4_layoutreturn *lrp = calldata;
6330
6331 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6332 nfs41_setup_sequence(lrp->clp->cl_session,
6333 &lrp->args.seq_args,
6334 &lrp->res.seq_res,
6335 task);
cbe82603
BH		 6336}
6337
6338static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6339{
6340 struct nfs4_layoutreturn *lrp = calldata;
6341 struct nfs_server *server;
6342
6343 dprintk("--> %s\n", __func__);
6344
6ba7db34 6345 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6346 return;
6347
6348 server = NFS_SERVER(lrp->args.inode);
6349 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6350 rpc_restart_call_prepare(task);
cbe82603
BH		 6351 return;
6352 }
cbe82603
BH		 6353 dprintk("<-- %s\n", __func__);
6354}
6355
6356static void nfs4_layoutreturn_release(void *calldata)
6357{
6358 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6359 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6360
6361 dprintk("--> %s\n", __func__);
849b286f
TM		 6362 spin_lock(&lo->plh_inode->i_lock);
6363 if (lrp->res.lrs_present)
6364 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6365 lo->plh_block_lgets--;
6366 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6367 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6368 kfree(calldata);
6369 dprintk("<-- %s\n", __func__);
6370}
6371
6372static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6373 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6374 .rpc_call_done = nfs4_layoutreturn_done,
6375 .rpc_release = nfs4_layoutreturn_release,
6376};
6377
6378int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6379{
6380 struct rpc_task *task;
6381 struct rpc_message msg = {
6382 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6383 .rpc_argp = &lrp->args,
6384 .rpc_resp = &lrp->res,
6385 };
6386 struct rpc_task_setup task_setup_data = {
6387 .rpc_client = lrp->clp->cl_rpcclient,
6388 .rpc_message = &msg,
6389 .callback_ops = &nfs4_layoutreturn_call_ops,
6390 .callback_data = lrp,
6391 };
6392 int status;
6393
6394 dprintk("--> %s\n", __func__);
9d12b216 6395 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6396 task = rpc_run_task(&task_setup_data);
6397 if (IS_ERR(task))
6398 return PTR_ERR(task);
6399 status = task->tk_status;
6400 dprintk("<-- %s status=%d\n", __func__, status);
6401 rpc_put_task(task);
6402 return status;
6403}
6404
7f11d8d3
AA		 6405/*
6406 * Retrieve the list of Data Server devices from the MDS.
6407 */
6408static int _nfs4_getdevicelist(struct nfs_server *server,
6409 const struct nfs_fh *fh,
6410 struct pnfs_devicelist *devlist)
6411{
6412 struct nfs4_getdevicelist_args args = {
6413 .fh = fh,
6414 .layoutclass = server->pnfs_curr_ld->id,
6415 };
6416 struct nfs4_getdevicelist_res res = {
6417 .devlist = devlist,
6418 };
6419 struct rpc_message msg = {
6420 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6421 .rpc_argp = &args,
6422 .rpc_resp = &res,
6423 };
6424 int status;
6425
6426 dprintk("--> %s\n", __func__);
6427 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6428 &res.seq_res, 0);
6429 dprintk("<-- %s status=%d\n", __func__, status);
6430 return status;
6431}
6432
6433int nfs4_proc_getdevicelist(struct nfs_server *server,
6434 const struct nfs_fh *fh,
6435 struct pnfs_devicelist *devlist)
6436{
6437 struct nfs4_exception exception = { };
6438 int err;
6439
6440 do {
6441 err = nfs4_handle_exception(server,
6442 _nfs4_getdevicelist(server, fh, devlist),
6443 &exception);
6444 } while (exception.retry);
6445
6446 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6447 err, devlist->num_devs);
6448
6449 return err;
6450}
6451EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6452
b1f69b75
AA		 6453static int
6454_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6455{
6456 struct nfs4_getdeviceinfo_args args = {
6457 .pdev = pdev,
6458 };
6459 struct nfs4_getdeviceinfo_res res = {
6460 .pdev = pdev,
6461 };
6462 struct rpc_message msg = {
6463 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6464 .rpc_argp = &args,
6465 .rpc_resp = &res,
6466 };
6467 int status;
6468
6469 dprintk("--> %s\n", __func__);
7c513058 6470 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6471 dprintk("<-- %s status=%d\n", __func__, status);
6472
6473 return status;
6474}
6475
6476int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6477{
6478 struct nfs4_exception exception = { };
6479 int err;
6480
6481 do {
6482 err = nfs4_handle_exception(server,
6483 _nfs4_proc_getdeviceinfo(server, pdev),
6484 &exception);
6485 } while (exception.retry);
6486 return err;
6487}
6488EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6489
863a3c6c
AA		 6490static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6491{
6492 struct nfs4_layoutcommit_data *data = calldata;
6493 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6494 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6495
d9afbd1b
TM		 6496 nfs41_setup_sequence(session,
6497 &data->args.seq_args,
6498 &data->res.seq_res,
6499 task);
863a3c6c
AA		 6500}
6501
6502static void
6503nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6504{
6505 struct nfs4_layoutcommit_data *data = calldata;
6506 struct nfs_server *server = NFS_SERVER(data->args.inode);
6507
6ba7db34 6508 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6509 return;
6510
6511 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6512 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6513 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6514 case -NFS4ERR_BADLAYOUT: /* no layout */
6515 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6516 task->tk_status = 0;
e59d27e0
TM		 6517 break;
6518 case 0:
863a3c6c
AA		 6519 nfs_post_op_update_inode_force_wcc(data->args.inode,
6520 data->res.fattr);
e59d27e0
TM		 6521 break;
6522 default:
6523 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6524 rpc_restart_call_prepare(task);
6525 return;
6526 }
6527 }
863a3c6c
AA		 6528}
6529
6530static void nfs4_layoutcommit_release(void *calldata)
6531{
6532 struct nfs4_layoutcommit_data *data = calldata;
6533
db29c089 6534 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 6535 put_rpccred(data->cred);
6536 kfree(data);
6537}
6538
6539static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6540 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6541 .rpc_call_done = nfs4_layoutcommit_done,
6542 .rpc_release = nfs4_layoutcommit_release,
6543};
6544
6545int
ef311537 6546nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6547{
6548 struct rpc_message msg = {
6549 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6550 .rpc_argp = &data->args,
6551 .rpc_resp = &data->res,
6552 .rpc_cred = data->cred,
6553 };
6554 struct rpc_task_setup task_setup_data = {
6555 .task = &data->task,
6556 .rpc_client = NFS_CLIENT(data->args.inode),
6557 .rpc_message = &msg,
6558 .callback_ops = &nfs4_layoutcommit_ops,
6559 .callback_data = data,
6560 .flags = RPC_TASK_ASYNC,
6561 };
6562 struct rpc_task *task;
6563 int status = 0;
6564
6565 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6566 "lbw: %llu inode %lu\n",
6567 data->task.tk_pid, sync,
6568 data->args.lastbytewritten,
6569 data->args.inode->i_ino);
6570
9d12b216 6571 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6572 task = rpc_run_task(&task_setup_data);
6573 if (IS_ERR(task))
6574 return PTR_ERR(task);
ef311537 6575 if (sync == false)
863a3c6c
AA		 6576 goto out;
6577 status = nfs4_wait_for_completion_rpc_task(task);
6578 if (status != 0)
6579 goto out;
6580 status = task->tk_status;
6581out:
6582 dprintk("%s: status %d\n", __func__, status);
6583 rpc_put_task(task);
6584 return status;
6585}
fca78d6d
BS		 6586
6587static int
6588_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6589 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6590{
6591 struct nfs41_secinfo_no_name_args args = {
6592 .style = SECINFO_STYLE_CURRENT_FH,
6593 };
6594 struct nfs4_secinfo_res res = {
6595 .flavors = flavors,
6596 };
6597 struct rpc_message msg = {
6598 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6599 .rpc_argp = &args,
6600 .rpc_resp = &res,
6601 };
6602 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6603}
6604
6605static int
6606nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6607 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6608{
6609 struct nfs4_exception exception = { };
6610 int err;
6611 do {
6612 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6613 switch (err) {
6614 case 0:
6615 case -NFS4ERR_WRONGSEC:
6616 case -NFS4ERR_NOTSUPP:
05e9cfb4 6617 goto out;
fca78d6d
BS		 6618 default:
6619 err = nfs4_handle_exception(server, err, &exception);
6620 }
6621 } while (exception.retry);
05e9cfb4 6622out:
fca78d6d
BS		 6623 return err;
6624}
6625
6626static int
6627nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6628 struct nfs_fsinfo *info)
6629{
6630 int err;
6631 struct page *page;
6632 rpc_authflavor_t flavor;
6633 struct nfs4_secinfo_flavors *flavors;
6634
6635 page = alloc_page(GFP_KERNEL);
6636 if (!page) {
6637 err = -ENOMEM;
6638 goto out;
6639 }
6640
6641 flavors = page_address(page);
6642 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6643
6644 /*
6645 * Fall back on "guess and check" method if
6646 * the server doesn't support SECINFO_NO_NAME
6647 */
6648 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6649 err = nfs4_find_root_sec(server, fhandle, info);
6650 goto out_freepage;
6651 }
6652 if (err)
6653 goto out_freepage;
6654
6655 flavor = nfs_find_best_sec(flavors);
6656 if (err == 0)
6657 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6658
6659out_freepage:
6660 put_page(page);
6661 if (err == -EACCES)
6662 return -EPERM;
6663out:
6664 return err;
6665}
1cab0652
BS		 6666
6667static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6668{
6669 int status;
6670 struct nfs41_test_stateid_args args = {
1cab0652 6671 .stateid = stateid,
7d974794
BS		 6672 };
6673 struct nfs41_test_stateid_res res;
6674 struct rpc_message msg = {
6675 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6676 .rpc_argp = &args,
6677 .rpc_resp = &res,
6678 };
1cab0652 6679
38527b15 6680 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6681 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6682 nfs4_set_sequence_privileged(&args.seq_args);
6683 status = nfs4_call_sync_sequence(server->client, server, &msg,
6684 &args.seq_args, &res.seq_res);
38527b15
CL		 6685 if (status != NFS_OK) {
6686 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6687 return status;
38527b15
CL		 6688 }
6689 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6690 return -res.status;
7d974794
BS		 6691}
6692
38527b15
CL		 6693/**
6694 * nfs41_test_stateid - perform a TEST_STATEID operation
6695 *
6696 * @server: server / transport on which to perform the operation
6697 * @stateid: state ID to test
6698 *
6699 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6700 * Otherwise a negative NFS4ERR value is returned if the operation
6701 * failed or the state ID is not currently valid.
6702 */
1cab0652 6703static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6704{
6705 struct nfs4_exception exception = { };
6706 int err;
6707 do {
377e507d
CL		 6708 err = _nfs41_test_stateid(server, stateid);
6709 if (err != -NFS4ERR_DELAY)
6710 break;
6711 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6712 } while (exception.retry);
6713 return err;
6714}
9aeda35f 6715
1cab0652 6716static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6717{
9aeda35f 6718 struct nfs41_free_stateid_args args = {
1cab0652 6719 .stateid = stateid,
9aeda35f
BS		 6720 };
6721 struct nfs41_free_stateid_res res;
6722 struct rpc_message msg = {
6723 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6724 .rpc_argp = &args,
6725 .rpc_resp = &res,
6726 };
38527b15 6727 int status;
9aeda35f 6728
38527b15 6729 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6730 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 6731 nfs4_set_sequence_privileged(&args.seq_args);
38527b15 6732 status = nfs4_call_sync_sequence(server->client, server, &msg,
8fe72bac 6733 &args.seq_args, &res.seq_res);
38527b15
CL		 6734 dprintk("NFS reply free_stateid: %d\n", status);
6735 return status;
9aeda35f
BS		 6736}
6737
38527b15
CL		 6738/**
6739 * nfs41_free_stateid - perform a FREE_STATEID operation
6740 *
6741 * @server: server / transport on which to perform the operation
6742 * @stateid: state ID to release
6743 *
6744 * Returns NFS_OK if the server freed "stateid". Otherwise a
6745 * negative NFS4ERR value is returned.
6746 */
1cab0652 6747static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6748{
6749 struct nfs4_exception exception = { };
6750 int err;
6751 do {
377e507d
CL		 6752 err = _nfs4_free_stateid(server, stateid);
6753 if (err != -NFS4ERR_DELAY)
6754 break;
6755 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6756 } while (exception.retry);
6757 return err;
6758}
36281caa
TM		 6759
6760static bool nfs41_match_stateid(const nfs4_stateid *s1,
6761 const nfs4_stateid *s2)
6762{
2d2f24ad 6763 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6764 return false;
6765
2d2f24ad 6766 if (s1->seqid == s2->seqid)
36281caa 6767 return true;
2d2f24ad 6768 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6769 return true;
6770
6771 return false;
6772}
6773
557134a3
AA		 6774#endif /* CONFIG_NFS_V4_1 */
6775
36281caa
TM		 6776static bool nfs4_match_stateid(const nfs4_stateid *s1,
6777 const nfs4_stateid *s2)
6778{
f597c537 6779 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6780}
6781
6782
17280175 6783static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6784 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6785 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6786 .recover_open = nfs4_open_reclaim,
6787 .recover_lock = nfs4_lock_reclaim,
591d71cb 6788 .establish_clid = nfs4_init_clientid,
90a16617 6789 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6790 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6791};
6792
591d71cb 6793#if defined(CONFIG_NFS_V4_1)
17280175 6794static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6795 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6796 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6797 .recover_open = nfs4_open_reclaim,
6798 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6799 .establish_clid = nfs41_init_clientid,
b4b82607 6800 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6801 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6802 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6803};
6804#endif /* CONFIG_NFS_V4_1 */
6805
17280175 6806static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6807 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6808 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6809 .recover_open = nfs4_open_expired,
6810 .recover_lock = nfs4_lock_expired,
6811 .establish_clid = nfs4_init_clientid,
90a16617 6812 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6813};
6814
6815#if defined(CONFIG_NFS_V4_1)
17280175 6816static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6817 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6818 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6819 .recover_open = nfs41_open_expired,
6820 .recover_lock = nfs41_lock_expired,
4d643d1d 6821 .establish_clid = nfs41_init_clientid,
b4b82607 6822 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6823};
591d71cb 6824#endif /* CONFIG_NFS_V4_1 */
1da177e4 6825
17280175 6826static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6827 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6828 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6829 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6830};
6831
6832#if defined(CONFIG_NFS_V4_1)
17280175 6833static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6834 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6835 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6836 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6837};
6838#endif
6839
97dc1359
TM		 6840static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6841 .minor_version = 0,
39c6daae
TM		 6842 .init_caps = NFS_CAP_READDIRPLUS
6843 | NFS_CAP_ATOMIC_OPEN
6844 | NFS_CAP_CHANGE_ATTR
6845 | NFS_CAP_POSIX_LOCK,
97dc1359 6846 .call_sync = _nfs4_call_sync,
36281caa 6847 .match_stateid = nfs4_match_stateid,
fca78d6d 6848 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6849 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6850 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6851 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6852};
6853
6854#if defined(CONFIG_NFS_V4_1)
6855static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6856 .minor_version = 1,
39c6daae
TM		 6857 .init_caps = NFS_CAP_READDIRPLUS
6858 | NFS_CAP_ATOMIC_OPEN
6859 | NFS_CAP_CHANGE_ATTR
3b66486c
TM		 6860 | NFS_CAP_POSIX_LOCK
6861 | NFS_CAP_STATEID_NFSV41,
104287cd 6862 .call_sync = nfs4_call_sync_sequence,
36281caa 6863 .match_stateid = nfs41_match_stateid,
fca78d6d 6864 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6865 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6866 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6867 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6868};
6869#endif
6870
97dc1359
TM		 6871const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6872 [0] = &nfs_v4_0_minor_ops,
6873#if defined(CONFIG_NFS_V4_1)
6874 [1] = &nfs_v4_1_minor_ops,
6875#endif
6876};
6877
73a79706
BS		 6878const struct inode_operations nfs4_dir_inode_operations = {
6879 .create = nfs_create,
6880 .lookup = nfs_lookup,
6881 .atomic_open = nfs_atomic_open,
6882 .link = nfs_link,
6883 .unlink = nfs_unlink,
6884 .symlink = nfs_symlink,
6885 .mkdir = nfs_mkdir,
6886 .rmdir = nfs_rmdir,
6887 .mknod = nfs_mknod,
6888 .rename = nfs_rename,
6889 .permission = nfs_permission,
6890 .getattr = nfs_getattr,
6891 .setattr = nfs_setattr,
6892 .getxattr = generic_getxattr,
6893 .setxattr = generic_setxattr,
6894 .listxattr = generic_listxattr,
6895 .removexattr = generic_removexattr,
6896};
6897
92e1d5be 6898static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6899 .permission = nfs_permission,
6900 .getattr = nfs_getattr,
6901 .setattr = nfs_setattr,
64c2ce8b
AK		 6902 .getxattr = generic_getxattr,
6903 .setxattr = generic_setxattr,
6904 .listxattr = generic_listxattr,
6905 .removexattr = generic_removexattr,
6b3b5496
BF		 6906};
6907
509de811 6908const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6909 .version = 4, /* protocol version */
6910 .dentry_ops = &nfs4_dentry_operations,
6911 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6912 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6913 .file_ops = &nfs4_file_operations,
1da177e4 6914 .getroot = nfs4_proc_get_root,
281cad46 6915 .submount = nfs4_submount,
ff9099f2 6916 .try_mount = nfs4_try_mount,
1da177e4
LT		 6917 .getattr = nfs4_proc_getattr,
6918 .setattr = nfs4_proc_setattr,
6919 .lookup = nfs4_proc_lookup,
6920 .access = nfs4_proc_access,
6921 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6922 .create = nfs4_proc_create,
6923 .remove = nfs4_proc_remove,
6924 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6925 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6926 .unlink_done = nfs4_proc_unlink_done,
6927 .rename = nfs4_proc_rename,
d3d4152a 6928 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6929 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6930 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6931 .link = nfs4_proc_link,
6932 .symlink = nfs4_proc_symlink,
6933 .mkdir = nfs4_proc_mkdir,
6934 .rmdir = nfs4_proc_remove,
6935 .readdir = nfs4_proc_readdir,
6936 .mknod = nfs4_proc_mknod,
6937 .statfs = nfs4_proc_statfs,
6938 .fsinfo = nfs4_proc_fsinfo,
6939 .pathconf = nfs4_proc_pathconf,
e9326dca 6940 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6941 .decode_dirent = nfs4_decode_dirent,
6942 .read_setup = nfs4_proc_read_setup,
1abb5088 6943 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 6944 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6945 .read_done = nfs4_read_done,
1da177e4 6946 .write_setup = nfs4_proc_write_setup,
57208fa7 6947 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 6948 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6949 .write_done = nfs4_write_done,
1da177e4 6950 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 6951 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 6952 .commit_done = nfs4_commit_done,
1da177e4 6953 .lock = nfs4_proc_lock,
e50a1c2e 6954 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6955 .close_context = nfs4_close_context,
2b484297 6956 .open_context = nfs4_atomic_open,
011e2a7f 6957 .have_delegation = nfs4_have_delegation,
57ec14c5 6958 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 6959 .alloc_client = nfs4_alloc_client,
45a52a02 6960 .init_client = nfs4_init_client,
cdb7eced 6961 .free_client = nfs4_free_client,
1179acc6
BS		 6962 .create_server = nfs4_create_server,
6963 .clone_server = nfs_clone_server,
1da177e4
LT		 6964};
6965
64c2ce8b
AK		 6966static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6967 .prefix = XATTR_NAME_NFSV4_ACL,
6968 .list = nfs4_xattr_list_nfs4_acl,
6969 .get = nfs4_xattr_get_nfs4_acl,
6970 .set = nfs4_xattr_set_nfs4_acl,
6971};
6972
6973const struct xattr_handler *nfs4_xattr_handlers[] = {
6974 &nfs4_xattr_nfs4_acl_handler,
6975 NULL
6976};
6977
1da177e4
LT		 6978/*
6979 * Local variables:
6980 * c-basic-offset: 8
6981 * End:
6982 */
Linux 6.x block layer and io_uring tree(s)