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Merge branch 'kbuild/rc-fixes' into kbuild/kconfig
[deliverable/linux.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:
96 return -EREMOTEIO;
7ebb9315
BS		 97 case -NFS4ERR_WRONGSEC:
98 return -EPERM;
3ddeb7c5
TM		 99 case -NFS4ERR_BADOWNER:
100 case -NFS4ERR_BADNAME:
101 return -EINVAL;
fb13bfa7
TM		 102 case -NFS4ERR_SHARE_DENIED:
103 return -EACCES;
f25efd85
SD		 104 case -NFS4ERR_MINOR_VERS_MISMATCH:
105 return -EPROTONOSUPPORT;
6168f62c
WAA		 106 case -NFS4ERR_ACCESS:
107 return -EACCES;
52567b03 108 default:
1da177e4 109 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 110 __func__, -err);
52567b03 111 break;
1da177e4 112 }
52567b03 113 return -EIO;
1da177e4
LT		 114}
115
116/*
117 * This is our standard bitmap for GETATTR requests.
118 */
1549210f 119const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 120 FATTR4_WORD0_TYPE
121 | FATTR4_WORD0_CHANGE
122 | FATTR4_WORD0_SIZE
123 | FATTR4_WORD0_FSID
124 | FATTR4_WORD0_FILEID,
125 FATTR4_WORD1_MODE
126 | FATTR4_WORD1_NUMLINKS
127 | FATTR4_WORD1_OWNER
128 | FATTR4_WORD1_OWNER_GROUP
129 | FATTR4_WORD1_RAWDEV
130 | FATTR4_WORD1_SPACE_USED
131 | FATTR4_WORD1_TIME_ACCESS
132 | FATTR4_WORD1_TIME_METADATA
133 | FATTR4_WORD1_TIME_MODIFY
134};
135
1549210f
TM		 136static const u32 nfs4_pnfs_open_bitmap[3] = {
137 FATTR4_WORD0_TYPE
138 | FATTR4_WORD0_CHANGE
139 | FATTR4_WORD0_SIZE
140 | FATTR4_WORD0_FSID
141 | FATTR4_WORD0_FILEID,
142 FATTR4_WORD1_MODE
143 | FATTR4_WORD1_NUMLINKS
144 | FATTR4_WORD1_OWNER
145 | FATTR4_WORD1_OWNER_GROUP
146 | FATTR4_WORD1_RAWDEV
147 | FATTR4_WORD1_SPACE_USED
148 | FATTR4_WORD1_TIME_ACCESS
149 | FATTR4_WORD1_TIME_METADATA
150 | FATTR4_WORD1_TIME_MODIFY,
151 FATTR4_WORD2_MDSTHRESHOLD
152};
153
e23008ec
AA		 154static const u32 nfs4_open_noattr_bitmap[3] = {
155 FATTR4_WORD0_TYPE
156 | FATTR4_WORD0_CHANGE
157 | FATTR4_WORD0_FILEID,
158};
159
1da177e4
LT		 160const u32 nfs4_statfs_bitmap[2] = {
161 FATTR4_WORD0_FILES_AVAIL
162 | FATTR4_WORD0_FILES_FREE
163 | FATTR4_WORD0_FILES_TOTAL,
164 FATTR4_WORD1_SPACE_AVAIL
165 | FATTR4_WORD1_SPACE_FREE
166 | FATTR4_WORD1_SPACE_TOTAL
167};
168
4ce79717 169const u32 nfs4_pathconf_bitmap[2] = {
1da177e4
LT		 170 FATTR4_WORD0_MAXLINK
171 | FATTR4_WORD0_MAXNAME,
172 0
173};
174
dae100c2 175const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 176 | FATTR4_WORD0_MAXREAD
177 | FATTR4_WORD0_MAXWRITE
178 | FATTR4_WORD0_LEASE_TIME,
55b6e774 179 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 180 | FATTR4_WORD1_FS_LAYOUT_TYPES,
181 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 182};
183
830b8e33
MN		 184const u32 nfs4_fs_locations_bitmap[2] = {
185 FATTR4_WORD0_TYPE
186 | FATTR4_WORD0_CHANGE
187 | FATTR4_WORD0_SIZE
188 | FATTR4_WORD0_FSID
189 | FATTR4_WORD0_FILEID
190 | FATTR4_WORD0_FS_LOCATIONS,
191 FATTR4_WORD1_MODE
192 | FATTR4_WORD1_NUMLINKS
193 | FATTR4_WORD1_OWNER
194 | FATTR4_WORD1_OWNER_GROUP
195 | FATTR4_WORD1_RAWDEV
196 | FATTR4_WORD1_SPACE_USED
197 | FATTR4_WORD1_TIME_ACCESS
198 | FATTR4_WORD1_TIME_METADATA
199 | FATTR4_WORD1_TIME_MODIFY
200 | FATTR4_WORD1_MOUNTED_ON_FILEID
201};
202
bc4785cd 203static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 204 struct nfs4_readdir_arg *readdir)
205{
0dbb4c67 206 __be32 *start, *p;
1da177e4 207
1da177e4 208 if (cookie > 2) {
b7ef1956 209 readdir->cookie = cookie;
1da177e4
LT		 210 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
211 return;
212 }
213
214 readdir->cookie = 0;
215 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
216 if (cookie == 2)
217 return;
218
219 /*
220 * NFSv4 servers do not return entries for '.' and '..'
221 * Therefore, we fake these entries here. We let '.'
222 * have cookie 0 and '..' have cookie 1. Note that
223 * when talking to the server, we always send cookie 0
224 * instead of 1 or 2.
225 */
2b86ce2d 226 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 227
228 if (cookie == 0) {
229 *p++ = xdr_one; /* next */
230 *p++ = xdr_zero; /* cookie, first word */
231 *p++ = xdr_one; /* cookie, second word */
232 *p++ = xdr_one; /* entry len */
233 memcpy(p, ".\0\0\0", 4); /* entry */
234 p++;
235 *p++ = xdr_one; /* bitmap length */
236 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
237 *p++ = htonl(8); /* attribute buffer length */
4e769b93 238 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 239 }
240
241 *p++ = xdr_one; /* next */
242 *p++ = xdr_zero; /* cookie, first word */
243 *p++ = xdr_two; /* cookie, second word */
244 *p++ = xdr_two; /* entry len */
245 memcpy(p, "..\0\0", 4); /* entry */
246 p++;
247 *p++ = xdr_one; /* bitmap length */
248 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
249 *p++ = htonl(8); /* attribute buffer length */
4e769b93 250 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 251
252 readdir->pgbase = (char *)p - (char *)start;
253 readdir->count -= readdir->pgbase;
2b86ce2d 254 kunmap_atomic(start);
1da177e4
LT		 255}
256
65de872e
TM		 257static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
258{
259 int res = 0;
260
261 might_sleep();
262
263 if (*timeout <= 0)
264 *timeout = NFS4_POLL_RETRY_MIN;
265 if (*timeout > NFS4_POLL_RETRY_MAX)
266 *timeout = NFS4_POLL_RETRY_MAX;
d310310c 267 freezable_schedule_timeout_killable(*timeout);
65de872e
TM		 268 if (fatal_signal_pending(current))
269 res = -ERESTARTSYS;
270 *timeout <<= 1;
271 return res;
272}
273
274/* This is the error handling routine for processes that are allowed
275 * to sleep.
276 */
b064eca2 277static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 278{
279 struct nfs_client *clp = server->nfs_client;
9e33bed5 280 struct nfs4_state *state = exception->state;
3114ea7a 281 struct inode *inode = exception->inode;
65de872e
TM		 282 int ret = errorcode;
283
284 exception->retry = 0;
285 switch(errorcode) {
286 case 0:
287 return 0;
3114ea7a 288 case -NFS4ERR_OPENMODE:
011e2a7f 289 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 290 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 291 exception->retry = 1;
292 return 0;
293 }
294 if (state == NULL)
295 break;
296 nfs4_schedule_stateid_recovery(server, state);
297 goto wait_on_recovery;
a1d0b5ee 298 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 299 case -NFS4ERR_ADMIN_REVOKED:
300 case -NFS4ERR_BAD_STATEID:
9e33bed5
TM		 301 if (state == NULL)
302 break;
14977489 303 nfs_remove_bad_delegation(state->inode);
0400a6b0
TM		 304 nfs4_schedule_stateid_recovery(server, state);
305 goto wait_on_recovery;
0ced63d1
TM		 306 case -NFS4ERR_EXPIRED:
307 if (state != NULL)
308 nfs4_schedule_stateid_recovery(server, state);
65de872e 309 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 310 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 311 nfs4_schedule_lease_recovery(clp);
312 goto wait_on_recovery;
03391693 313#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 314 case -NFS4ERR_BADSESSION:
315 case -NFS4ERR_BADSLOT:
316 case -NFS4ERR_BAD_HIGH_SLOT:
317 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
318 case -NFS4ERR_DEADSESSION:
319 case -NFS4ERR_SEQ_FALSE_RETRY:
320 case -NFS4ERR_SEQ_MISORDERED:
321 dprintk("%s ERROR: %d Reset session\n", __func__,
322 errorcode);
9f594791 323 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 324 goto wait_on_recovery;
03391693 325#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 326 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 327 if (exception->timeout > HZ) {
328 /* We have retried a decent amount, time to
329 * fail
330 */
331 ret = -EBUSY;
332 break;
333 }
65de872e
TM		 334 case -NFS4ERR_GRACE:
335 case -NFS4ERR_DELAY:
336 ret = nfs4_delay(server->client, &exception->timeout);
337 if (ret != 0)
338 break;
a8a4ae3a 339 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 340 case -NFS4ERR_OLD_STATEID:
341 exception->retry = 1;
b064eca2
TM		 342 break;
343 case -NFS4ERR_BADOWNER:
344 /* The following works around a Linux server bug! */
345 case -NFS4ERR_BADNAME:
346 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
347 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
348 exception->retry = 1;
349 printk(KERN_WARNING "NFS: v4 server %s "
350 "does not accept raw "
351 "uid/gids. "
352 "Reenabling the idmapper.\n",
353 server->nfs_client->cl_hostname);
354 }
65de872e
TM		 355 }
356 /* We failed to handle the error */
357 return nfs4_map_errors(ret);
0400a6b0 358wait_on_recovery:
a2c0b9e2
TM		 359 ret = nfs4_wait_clnt_recover(clp);
360 if (ret == 0)
361 exception->retry = 1;
362 return ret;
65de872e
TM		 363}
364
365
452e9352 366static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 367{
1da177e4
LT		 368 spin_lock(&clp->cl_lock);
369 if (time_before(clp->cl_last_renewal,timestamp))
370 clp->cl_last_renewal = timestamp;
371 spin_unlock(&clp->cl_lock);
372}
373
452e9352
TM		 374static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
375{
376 do_renew_lease(server->nfs_client, timestamp);
377}
378
cccef3b9
AA		 379#if defined(CONFIG_NFS_V4_1)
380
d185a334 381static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 382{
e3725ec0 383 struct nfs4_session *session;
13615871 384 struct nfs4_slot_table *tbl;
c10e4498 385 bool send_new_highest_used_slotid = false;
13615871 386
dfb4f309 387 if (!res->sr_slot) {
13615871
AA		 388 /* just wake up the next guy waiting since
389 * we may have not consumed a slot after all */
691daf3b 390 dprintk("%s: No slot\n", __func__);
35dc1d74 391 return;
13615871 392 }
e3725ec0
TM		 393 tbl = res->sr_slot->table;
394 session = tbl->session;
ea028ac9 395
35dc1d74 396 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 397 /* Be nice to the server: try to ensure that the last transmitted
398 * value for highest_user_slotid <= target_highest_slotid
399 */
400 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
401 send_new_highest_used_slotid = true;
402
b75ad4cd
TM		 403 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
404 send_new_highest_used_slotid = false;
405 goto out_unlock;
406 }
f4af6e2a 407 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 408
409 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
410 send_new_highest_used_slotid = false;
b75ad4cd 411out_unlock:
35dc1d74 412 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 413 res->sr_slot = NULL;
c10e4498
TM		 414 if (send_new_highest_used_slotid)
415 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 416}
417
14516c3a 418static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 419{
e3725ec0 420 struct nfs4_session *session;
933602e3 421 struct nfs4_slot *slot;
14516c3a 422 struct nfs_client *clp;
ac20d163 423 bool interrupted = false;
85563073 424 int ret = 1;
b0df806c 425
468f8613
BS		 426 /* don't increment the sequence number if the task wasn't sent */
427 if (!RPC_WAS_SENT(task))
b0df806c
AA		 428 goto out;
429
933602e3 430 slot = res->sr_slot;
e3725ec0 431 session = slot->table->session;
933602e3 432
ac20d163
TM		 433 if (slot->interrupted) {
434 slot->interrupted = 0;
435 interrupted = true;
436 }
437
691daf3b 438 /* Check the SEQUENCE operation status */
14516c3a
TM		 439 switch (res->sr_status) {
440 case 0:
b0df806c 441 /* Update the slot's sequence and clientid lease timer */
933602e3 442 ++slot->seq_nr;
e3725ec0 443 clp = session->clp;
8e63b6a8 444 do_renew_lease(clp, res->sr_timestamp);
0629e370 445 /* Check sequence flags */
b4410c2f
TM		 446 if (res->sr_status_flags != 0)
447 nfs4_schedule_lease_recovery(clp);
464ee9f9 448 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 449 break;
ac20d163
TM		 450 case 1:
451 /*
452 * sr_status remains 1 if an RPC level error occurred.
453 * The server may or may not have processed the sequence
454 * operation..
455 * Mark the slot as having hosted an interrupted RPC call.
456 */
457 slot->interrupted = 1;
458 goto out;
14516c3a
TM		 459 case -NFS4ERR_DELAY:
460 /* The server detected a resend of the RPC call and
461 * returned NFS4ERR_DELAY as per Section 2.10.6.2
462 * of RFC5661.
463 */
df2fabff 464 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 465 __func__,
df2fabff 466 slot->slot_nr,
933602e3 467 slot->seq_nr);
14516c3a 468 goto out_retry;
85563073
TM		 469 case -NFS4ERR_BADSLOT:
470 /*
471 * The slot id we used was probably retired. Try again
472 * using a different slot id.
473 */
e8794440
TM		 474 goto retry_nowait;
475 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 476 /*
477 * Was the last operation on this sequence interrupted?
478 * If so, retry after bumping the sequence number.
479 */
480 if (interrupted) {
481 ++slot->seq_nr;
482 goto retry_nowait;
483 }
e8794440
TM		 484 /*
485 * Could this slot have been previously retired?
486 * If so, then the server may be expecting seq_nr = 1!
487 */
8e63b6a8
TM		 488 if (slot->seq_nr != 1) {
489 slot->seq_nr = 1;
490 goto retry_nowait;
491 }
492 break;
e8794440
TM		 493 case -NFS4ERR_SEQ_FALSE_RETRY:
494 ++slot->seq_nr;
495 goto retry_nowait;
14516c3a
TM		 496 default:
497 /* Just update the slot sequence no. */
933602e3 498 ++slot->seq_nr;
b0df806c
AA		 499 }
500out:
501 /* The session may be reset by one of the error handlers. */
502 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 503 nfs41_sequence_free_slot(res);
85563073 504 return ret;
e8794440
TM		 505retry_nowait:
506 if (rpc_restart_call_prepare(task)) {
507 task->tk_status = 0;
508 ret = 0;
509 }
510 goto out;
14516c3a 511out_retry:
d05dd4e9 512 if (!rpc_restart_call(task))
14516c3a
TM		 513 goto out;
514 rpc_delay(task, NFS4_POLL_RETRY_MAX);
515 return 0;
b0df806c
AA		 516}
517
14516c3a
TM		 518static int nfs4_sequence_done(struct rpc_task *task,
519 struct nfs4_sequence_res *res)
df896455 520{
e3725ec0 521 if (res->sr_slot == NULL)
14516c3a
TM		 522 return 1;
523 return nfs41_sequence_done(task, res);
df896455
TM		 524}
525
9d12b216
TM		 526static void nfs41_init_sequence(struct nfs4_sequence_args *args,
527 struct nfs4_sequence_res *res, int cache_reply)
528{
2b2fa717 529 args->sa_slot = NULL;
9d12b216 530 args->sa_cache_this = 0;
8fe72bac 531 args->sa_privileged = 0;
9d12b216
TM		 532 if (cache_reply)
533 args->sa_cache_this = 1;
9d12b216
TM		 534 res->sr_slot = NULL;
535}
536
8fe72bac
TM		 537static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
538{
539 args->sa_privileged = 1;
540}
541
dc70d7b3 542int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 543 struct nfs4_sequence_args *args,
544 struct nfs4_sequence_res *res,
ce5039c1
AA		 545 struct rpc_task *task)
546{
fbcd4abc
AA		 547 struct nfs4_slot *slot;
548 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 549
550 dprintk("--> %s\n", __func__);
ce5039c1 551 /* slot already allocated? */
dfb4f309 552 if (res->sr_slot != NULL)
d9afbd1b 553 goto out_success;
ce5039c1 554
fbcd4abc
AA		 555 tbl = &session->fc_slot_table;
556
69d206b5
TM		 557 task->tk_timeout = 0;
558
fbcd4abc 559 spin_lock(&tbl->slot_tbl_lock);
a2118c33 560 if (test_bit(NFS4_SESSION_DRAINING, &session->session_state) &&
8fe72bac 561 !args->sa_privileged) {
0b1c8fc4 562 /* The state manager will wait until the slot table is empty */
0b1c8fc4 563 dprintk("%s session is draining\n", __func__);
7b939a3f 564 goto out_sleep;
689cf5c1
AB		 565 }
566
2dc03b7f 567 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 568 if (IS_ERR(slot)) {
569 /* If out of memory, try again in 1/4 second */
570 if (slot == ERR_PTR(-ENOMEM))
571 task->tk_timeout = HZ >> 2;
fbcd4abc 572 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 573 goto out_sleep;
fbcd4abc
AA		 574 }
575 spin_unlock(&tbl->slot_tbl_lock);
576
2b2fa717 577 args->sa_slot = slot;
fbcd4abc 578
2dc03b7f
TM		 579 dprintk("<-- %s slotid=%d seqid=%d\n", __func__,
580 slot->slot_nr, slot->seq_nr);
fbcd4abc 581
dfb4f309 582 res->sr_slot = slot;
8e63b6a8 583 res->sr_timestamp = jiffies;
2a6e26cd 584 res->sr_status_flags = 0;
fbcd4abc
AA		 585 /*
586 * sr_status is only set in decode_sequence, and so will remain
587 * set to 1 if an rpc level failure occurs.
588 */
589 res->sr_status = 1;
d9afbd1b
TM		 590out_success:
591 rpc_call_start(task);
ce5039c1 592 return 0;
7b939a3f 593out_sleep:
8fe72bac
TM		 594 /* Privileged tasks are queued with top priority */
595 if (args->sa_privileged)
1e1093c7
TM		 596 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
597 NULL, RPC_PRIORITY_PRIVILEGED);
598 else
599 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 600 spin_unlock(&tbl->slot_tbl_lock);
601 return -EAGAIN;
ce5039c1 602}
dc70d7b3 603EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 604
035168ab 605int nfs4_setup_sequence(const struct nfs_server *server,
ce5039c1
AA		 606 struct nfs4_sequence_args *args,
607 struct nfs4_sequence_res *res,
ce5039c1
AA		 608 struct rpc_task *task)
609{
035168ab 610 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 611 int ret = 0;
612
d9afbd1b
TM		 613 if (session == NULL) {
614 rpc_call_start(task);
035168ab 615 goto out;
d9afbd1b 616 }
035168ab 617
df2fabff 618 dprintk("--> %s clp %p session %p sr_slot %d\n",
dfb4f309 619 __func__, session->clp, session, res->sr_slot ?
df2fabff 620 res->sr_slot->slot_nr : -1);
ce5039c1 621
9d12b216 622 ret = nfs41_setup_sequence(session, args, res, task);
ce5039c1
AA		 623out:
624 dprintk("<-- %s status=%d\n", __func__, ret);
625 return ret;
626}
627
628struct nfs41_call_sync_data {
035168ab 629 const struct nfs_server *seq_server;
ce5039c1
AA		 630 struct nfs4_sequence_args *seq_args;
631 struct nfs4_sequence_res *seq_res;
ce5039c1
AA		 632};
633
634static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
635{
636 struct nfs41_call_sync_data *data = calldata;
6ba7db34 637 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 638
035168ab
TM		 639 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
640
d9afbd1b 641 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 642}
643
69ab40c4
AA		 644static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
645{
646 struct nfs41_call_sync_data *data = calldata;
647
14516c3a 648 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 649}
650
17280175 651static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 652 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 653 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 654};
655
7c513058
BS		 656static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
657 struct nfs_server *server,
ce5039c1
AA		 658 struct rpc_message *msg,
659 struct nfs4_sequence_args *args,
8fe72bac 660 struct nfs4_sequence_res *res)
ce5039c1
AA		 661{
662 int ret;
663 struct rpc_task *task;
664 struct nfs41_call_sync_data data = {
035168ab 665 .seq_server = server,
ce5039c1
AA		 666 .seq_args = args,
667 .seq_res = res,
ce5039c1
AA		 668 };
669 struct rpc_task_setup task_setup = {
7c513058 670 .rpc_client = clnt,
ce5039c1
AA		 671 .rpc_message = msg,
672 .callback_ops = &nfs41_call_sync_ops,
673 .callback_data = &data
674 };
675
ce5039c1
AA		 676 task = rpc_run_task(&task_setup);
677 if (IS_ERR(task))
678 ret = PTR_ERR(task);
679 else {
680 ret = task->tk_status;
681 rpc_put_task(task);
682 }
683 return ret;
684}
685
df896455 686#else
8fe72bac 687static
9d12b216
TM		 688void nfs41_init_sequence(struct nfs4_sequence_args *args,
689 struct nfs4_sequence_res *res, int cache_reply)
690{
691}
692
8fe72bac
TM		 693static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
694{
695}
696
697
14516c3a
TM		 698static int nfs4_sequence_done(struct rpc_task *task,
699 struct nfs4_sequence_res *res)
df896455 700{
14516c3a 701 return 1;
df896455 702}
cccef3b9
AA		 703#endif /* CONFIG_NFS_V4_1 */
704
fd0c0953 705static
7c513058
BS		 706int _nfs4_call_sync(struct rpc_clnt *clnt,
707 struct nfs_server *server,
cccef3b9
AA		 708 struct rpc_message *msg,
709 struct nfs4_sequence_args *args,
fd0c0953 710 struct nfs4_sequence_res *res)
cccef3b9 711{
7c513058 712 return rpc_call_sync(clnt, msg, 0);
cccef3b9
AA		 713}
714
fd0c0953 715static
7c513058
BS		 716int nfs4_call_sync(struct rpc_clnt *clnt,
717 struct nfs_server *server,
e73b83f2
BS		 718 struct rpc_message *msg,
719 struct nfs4_sequence_args *args,
720 struct nfs4_sequence_res *res,
721 int cache_reply)
722{
fd0c0953 723 nfs41_init_sequence(args, res, cache_reply);
7c513058 724 return server->nfs_client->cl_mvops->call_sync(clnt, server, msg,
fd0c0953 725 args, res);
e73b83f2 726}
cccef3b9 727
38478b24 728static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 729{
38478b24 730 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 731
38478b24 732 spin_lock(&dir->i_lock);
359d7d1c 733 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 734 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 735 nfs_force_lookup_revalidate(dir);
a9a4a87a 736 dir->i_version = cinfo->after;
de242c0b 737 nfs_fscache_invalidate(dir);
38478b24 738 spin_unlock(&dir->i_lock);
1da177e4
LT		 739}
740
e56e0b78 741struct nfs4_opendata {
c6d00e63 742 struct kref kref;
e56e0b78
TM		 743 struct nfs_openargs o_arg;
744 struct nfs_openres o_res;
cdd4e68b
TM		 745 struct nfs_open_confirmargs c_arg;
746 struct nfs_open_confirmres c_res;
6926afd1
TM		 747 struct nfs4_string owner_name;
748 struct nfs4_string group_name;
e56e0b78 749 struct nfs_fattr f_attr;
e56e0b78 750 struct dentry *dir;
82a2c1b7 751 struct dentry *dentry;
e56e0b78 752 struct nfs4_state_owner *owner;
aac00a8d 753 struct nfs4_state *state;
e56e0b78 754 struct iattr attrs;
26e976a8 755 unsigned long timestamp;
3e309914 756 unsigned int rpc_done : 1;
24ac23ab
TM		 757 int rpc_status;
758 int cancelled;
e56e0b78
TM		 759};
760
2ced46c2
TM		 761
762static void nfs4_init_opendata_res(struct nfs4_opendata *p)
763{
764 p->o_res.f_attr = &p->f_attr;
c1d51931
TM		 765 p->o_res.seqid = p->o_arg.seqid;
766 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 767 p->o_res.server = p->o_arg.server;
5f657530 768 p->o_res.access_request = p->o_arg.access;
2ced46c2 769 nfs_fattr_init(&p->f_attr);
6926afd1 770 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 771}
772
82a2c1b7 773static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 774 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be
TM		 775 const struct iattr *attrs,
776 gfp_t gfp_mask)
e56e0b78 777{
82a2c1b7 778 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 779 struct inode *dir = parent->d_inode;
780 struct nfs_server *server = NFS_SERVER(dir);
781 struct nfs4_opendata *p;
782
8535b2be 783 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 784 if (p == NULL)
785 goto err;
8535b2be 786 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78
TM		 787 if (p->o_arg.seqid == NULL)
788 goto err_free;
82a2c1b7
AV		 789 nfs_sb_active(dentry->d_sb);
790 p->dentry = dget(dentry);
e56e0b78
TM		 791 p->dir = parent;
792 p->owner = sp;
793 atomic_inc(&sp->so_count);
794 p->o_arg.fh = NFS_FH(dir);
dc0b027d
TM		 795 p->o_arg.open_flags = flags;
796 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 797 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
798 * will return permission denied for all bits until close */
799 if (!(flags & O_EXCL)) {
800 /* ask server to check for all possible rights as results
801 * are cached */
802 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
803 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 804 }
7539bbab 805 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 806 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
807 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 808 p->o_arg.name = &dentry->d_name;
e56e0b78
TM		 809 p->o_arg.server = server;
810 p->o_arg.bitmask = server->attr_bitmask;
1549210f 811 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
e56e0b78 812 p->o_arg.claim = NFS4_OPEN_CLAIM_NULL;
536e43d1 813 if (attrs != NULL && attrs->ia_valid != 0) {
cd93710e 814 __be32 verf[2];
d77d76ff 815
e56e0b78
TM		 816 p->o_arg.u.attrs = &p->attrs;
817 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 818
819 verf[0] = jiffies;
820 verf[1] = current->pid;
821 memcpy(p->o_arg.u.verifier.data, verf,
822 sizeof(p->o_arg.u.verifier.data));
e56e0b78 823 }
cdd4e68b
TM		 824 p->c_arg.fh = &p->o_res.fh;
825 p->c_arg.stateid = &p->o_res.stateid;
826 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 827 nfs4_init_opendata_res(p);
c6d00e63 828 kref_init(&p->kref);
e56e0b78
TM		 829 return p;
830err_free:
831 kfree(p);
832err:
833 dput(parent);
834 return NULL;
835}
836
c6d00e63 837static void nfs4_opendata_free(struct kref *kref)
e56e0b78 838{
c6d00e63
TM		 839 struct nfs4_opendata *p = container_of(kref,
840 struct nfs4_opendata, kref);
82a2c1b7 841 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 842
843 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 844 if (p->state != NULL)
845 nfs4_put_open_state(p->state);
c6d00e63
TM		 846 nfs4_put_state_owner(p->owner);
847 dput(p->dir);
82a2c1b7
AV		 848 dput(p->dentry);
849 nfs_sb_deactive(sb);
6926afd1 850 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 851 kfree(p);
852}
853
854static void nfs4_opendata_put(struct nfs4_opendata *p)
855{
856 if (p != NULL)
857 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 858}
859
06f814a3
TM		 860static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
861{
06f814a3
TM		 862 int ret;
863
06f814a3 864 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 865 return ret;
866}
867
dc0b027d 868static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 869{
870 int ret = 0;
dc0b027d 871
536e43d1 872 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 873 goto out;
874 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 875 case FMODE_READ:
88069f77
TM		 876 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
877 && state->n_rdonly != 0;
6ee41268
TM		 878 break;
879 case FMODE_WRITE:
88069f77
TM		 880 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
881 && state->n_wronly != 0;
6ee41268
TM		 882 break;
883 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 884 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
885 && state->n_rdwr != 0;
6ee41268 886 }
dc0b027d 887out:
6ee41268
TM		 888 return ret;
889}
890
dc0b027d 891static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 892{
652f89f6
TM		 893 if (delegation == NULL)
894 return 0;
dc0b027d 895 if ((delegation->type & fmode) != fmode)
aac00a8d 896 return 0;
15c831bf 897 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 898 return 0;
b7391f44 899 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 900 return 1;
901}
902
dc0b027d 903static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 904{
dc0b027d 905 switch (fmode) {
e7616923
TM		 906 case FMODE_WRITE:
907 state->n_wronly++;
908 break;
909 case FMODE_READ:
910 state->n_rdonly++;
911 break;
912 case FMODE_READ|FMODE_WRITE:
913 state->n_rdwr++;
914 }
dc0b027d 915 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 916}
917
dc0b027d 918static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 919{
920 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 921 nfs4_stateid_copy(&state->stateid, stateid);
922 nfs4_stateid_copy(&state->open_stateid, stateid);
dc0b027d 923 switch (fmode) {
003707c7
TM		 924 case FMODE_READ:
925 set_bit(NFS_O_RDONLY_STATE, &state->flags);
926 break;
927 case FMODE_WRITE:
928 set_bit(NFS_O_WRONLY_STATE, &state->flags);
929 break;
930 case FMODE_READ|FMODE_WRITE:
931 set_bit(NFS_O_RDWR_STATE, &state->flags);
932 }
e7616923
TM		 933}
934
dc0b027d 935static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 936{
8bda4e4c 937 write_seqlock(&state->seqlock);
dc0b027d 938 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 939 write_sequnlock(&state->seqlock);
003707c7
TM		 940}
941
dc0b027d 942static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 943{
8bda4e4c
TM		 944 /*
945 * Protect the call to nfs4_state_set_mode_locked and
946 * serialise the stateid update
947 */
948 write_seqlock(&state->seqlock);
003707c7 949 if (deleg_stateid != NULL) {
f597c537 950 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 951 set_bit(NFS_DELEGATED_STATE, &state->flags);
952 }
953 if (open_stateid != NULL)
dc0b027d 954 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 955 write_sequnlock(&state->seqlock);
956 spin_lock(&state->owner->so_lock);
dc0b027d 957 update_open_stateflags(state, fmode);
ec073428 958 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 959}
960
dc0b027d 961static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 962{
963 struct nfs_inode *nfsi = NFS_I(state->inode);
964 struct nfs_delegation *deleg_cur;
965 int ret = 0;
966
dc0b027d 967 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 968
969 rcu_read_lock();
970 deleg_cur = rcu_dereference(nfsi->delegation);
971 if (deleg_cur == NULL)
972 goto no_delegation;
973
974 spin_lock(&deleg_cur->lock);
975 if (nfsi->delegation != deleg_cur ||
dc0b027d 976 (deleg_cur->type & fmode) != fmode)
34310430
TM		 977 goto no_delegation_unlock;
978
979 if (delegation == NULL)
980 delegation = &deleg_cur->stateid;
f597c537 981 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 982 goto no_delegation_unlock;
983
b7391f44 984 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 985 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 986 ret = 1;
987no_delegation_unlock:
988 spin_unlock(&deleg_cur->lock);
989no_delegation:
990 rcu_read_unlock();
991
992 if (!ret && open_stateid != NULL) {
dc0b027d 993 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 994 ret = 1;
995 }
996
997 return ret;
998}
999
1000
dc0b027d 1001static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1002{
1003 struct nfs_delegation *delegation;
1004
1005 rcu_read_lock();
1006 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1007 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1008 rcu_read_unlock();
1009 return;
1010 }
1011 rcu_read_unlock();
57ec14c5 1012 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1013}
1014
6ee41268 1015static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1016{
1017 struct nfs4_state *state = opendata->state;
1018 struct nfs_inode *nfsi = NFS_I(state->inode);
1019 struct nfs_delegation *delegation;
536e43d1 1020 int open_mode = opendata->o_arg.open_flags & (O_EXCL|O_TRUNC);
dc0b027d 1021 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1022 nfs4_stateid stateid;
1023 int ret = -EAGAIN;
1024
aac00a8d 1025 for (;;) {
dc0b027d 1026 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1027 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1028 if (can_open_cached(state, fmode, open_mode)) {
1029 update_open_stateflags(state, fmode);
6ee41268 1030 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1031 goto out_return_state;
1032 }
1033 spin_unlock(&state->owner->so_lock);
1034 }
34310430
TM		 1035 rcu_read_lock();
1036 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1037 if (!can_open_delegated(delegation, fmode)) {
34310430 1038 rcu_read_unlock();
aac00a8d 1039 break;
34310430 1040 }
aac00a8d 1041 /* Save the delegation */
f597c537 1042 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1043 rcu_read_unlock();
af22f94a 1044 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
aac00a8d
TM		 1045 if (ret != 0)
1046 goto out;
1047 ret = -EAGAIN;
34310430
TM		 1048
1049 /* Try to update the stateid using the delegation */
dc0b027d 1050 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1051 goto out_return_state;
aac00a8d 1052 }
aac00a8d
TM		 1053out:
1054 return ERR_PTR(ret);
1055out_return_state:
1056 atomic_inc(&state->count);
1057 return state;
1058}
1059
e23008ec
AA		 1060static void
1061nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1062{
1063 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1064 struct nfs_delegation *delegation;
1065 int delegation_flags = 0;
1066
1067 rcu_read_lock();
1068 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1069 if (delegation)
1070 delegation_flags = delegation->flags;
1071 rcu_read_unlock();
1072 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1073 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1074 "returning a delegation for "
1075 "OPEN(CLAIM_DELEGATE_CUR)\n",
1076 clp->cl_hostname);
1077 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1078 nfs_inode_set_delegation(state->inode,
1079 data->owner->so_cred,
1080 &data->o_res);
1081 else
1082 nfs_inode_reclaim_delegation(state->inode,
1083 data->owner->so_cred,
1084 &data->o_res);
1085}
1086
1087/*
1088 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1089 * and update the nfs4_state.
1090 */
1091static struct nfs4_state *
1092_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1093{
1094 struct inode *inode = data->state->inode;
1095 struct nfs4_state *state = data->state;
1096 int ret;
1097
1098 if (!data->rpc_done) {
1099 ret = data->rpc_status;
1100 goto err;
1101 }
1102
1103 ret = -ESTALE;
1104 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1105 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1106 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1107 goto err;
1108
1109 ret = -ENOMEM;
1110 state = nfs4_get_open_state(inode, data->owner);
1111 if (state == NULL)
1112 goto err;
1113
1114 ret = nfs_refresh_inode(inode, &data->f_attr);
1115 if (ret)
1116 goto err;
1117
1118 if (data->o_res.delegation_type != 0)
1119 nfs4_opendata_check_deleg(data, state);
1120 update_open_stateid(state, &data->o_res.stateid, NULL,
1121 data->o_arg.fmode);
1122
1123 return state;
1124err:
1125 return ERR_PTR(ret);
1126
1127}
1128
1129static struct nfs4_state *
1130_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1131{
1132 struct inode *inode;
1133 struct nfs4_state *state = NULL;
1b370bc2 1134 int ret;
24ac23ab 1135
aac00a8d 1136 if (!data->rpc_done) {
6ee41268 1137 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1138 goto out;
1139 }
1140
1b370bc2 1141 ret = -EAGAIN;
24ac23ab 1142 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1143 goto err;
24ac23ab 1144 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr);
1b370bc2 1145 ret = PTR_ERR(inode);
03f28e3a 1146 if (IS_ERR(inode))
1b370bc2
TM		 1147 goto err;
1148 ret = -ENOMEM;
24ac23ab
TM		 1149 state = nfs4_get_open_state(inode, data->owner);
1150 if (state == NULL)
1b370bc2 1151 goto err_put_inode;
e23008ec
AA		 1152 if (data->o_res.delegation_type != 0)
1153 nfs4_opendata_check_deleg(data, state);
34310430 1154 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1155 data->o_arg.fmode);
24ac23ab 1156 iput(inode);
aac00a8d 1157out:
24ac23ab 1158 return state;
1b370bc2
TM		 1159err_put_inode:
1160 iput(inode);
1161err:
1162 return ERR_PTR(ret);
24ac23ab
TM		 1163}
1164
e23008ec
AA		 1165static struct nfs4_state *
1166nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1167{
1168 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1169 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1170 return _nfs4_opendata_to_nfs4_state(data);
1171}
1172
864472e9
TM		 1173static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1174{
1175 struct nfs_inode *nfsi = NFS_I(state->inode);
1176 struct nfs_open_context *ctx;
1177
1178 spin_lock(&state->inode->i_lock);
1179 list_for_each_entry(ctx, &nfsi->open_files, list) {
1180 if (ctx->state != state)
1181 continue;
1182 get_nfs_open_context(ctx);
1183 spin_unlock(&state->inode->i_lock);
1184 return ctx;
1185 }
1186 spin_unlock(&state->inode->i_lock);
1187 return ERR_PTR(-ENOENT);
1188}
1189
6f220ed5
TM		 1190static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx, struct nfs4_state *state)
1191{
1192 struct nfs4_opendata *opendata;
1193
3d4ff43d 1194 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0, NULL, GFP_NOFS);
6f220ed5
TM		 1195 if (opendata == NULL)
1196 return ERR_PTR(-ENOMEM);
1197 opendata->state = state;
1198 atomic_inc(&state->count);
1199 return opendata;
1200}
1201
dc0b027d 1202static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1203{
2ced46c2 1204 struct nfs4_state *newstate;
864472e9
TM		 1205 int ret;
1206
dc0b027d
TM		 1207 opendata->o_arg.open_flags = 0;
1208 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1209 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1210 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1211 nfs4_init_opendata_res(opendata);
b257957e 1212 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1213 if (ret != 0)
1214 return ret;
2ced46c2 1215 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1216 if (IS_ERR(newstate))
1217 return PTR_ERR(newstate);
643168c2 1218 nfs4_close_state(newstate, fmode);
2ced46c2 1219 *res = newstate;
864472e9
TM		 1220 return 0;
1221}
1222
1223static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1224{
864472e9 1225 struct nfs4_state *newstate;
864472e9
TM		 1226 int ret;
1227
1228 /* memory barrier prior to reading state->n_* */
2ced46c2 1229 clear_bit(NFS_DELEGATED_STATE, &state->flags);
864472e9
TM		 1230 smp_rmb();
1231 if (state->n_rdwr != 0) {
b0ed9dbc 1232 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1233 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1234 if (ret != 0)
1235 return ret;
2ced46c2
TM		 1236 if (newstate != state)
1237 return -ESTALE;
864472e9
TM		 1238 }
1239 if (state->n_wronly != 0) {
b0ed9dbc 1240 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1241 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1242 if (ret != 0)
1243 return ret;
2ced46c2
TM		 1244 if (newstate != state)
1245 return -ESTALE;
864472e9
TM		 1246 }
1247 if (state->n_rdonly != 0) {
b0ed9dbc 1248 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1249 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1250 if (ret != 0)
1251 return ret;
2ced46c2
TM		 1252 if (newstate != state)
1253 return -ESTALE;
864472e9 1254 }
1ac7e2fd
TM		 1255 /*
1256 * We may have performed cached opens for all three recoveries.
1257 * Check if we need to update the current stateid.
1258 */
1259 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1260 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1261 write_seqlock(&state->seqlock);
1ac7e2fd 1262 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1263 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1264 write_sequnlock(&state->seqlock);
1ac7e2fd 1265 }
864472e9
TM		 1266 return 0;
1267}
1268
1da177e4
LT		 1269/*
1270 * OPEN_RECLAIM:
1271 * reclaim state on the server after a reboot.
1da177e4 1272 */
539cd03a 1273static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1274{
1ac7e2fd 1275 struct nfs_delegation *delegation;
864472e9 1276 struct nfs4_opendata *opendata;
dc0b027d 1277 fmode_t delegation_type = 0;
1da177e4
LT		 1278 int status;
1279
6f220ed5
TM		 1280 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1281 if (IS_ERR(opendata))
1282 return PTR_ERR(opendata);
864472e9
TM		 1283 opendata->o_arg.claim = NFS4_OPEN_CLAIM_PREVIOUS;
1284 opendata->o_arg.fh = NFS_FH(state->inode);
1ac7e2fd
TM		 1285 rcu_read_lock();
1286 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1287 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1288 delegation_type = delegation->type;
1ac7e2fd 1289 rcu_read_unlock();
864472e9
TM		 1290 opendata->o_arg.u.delegation_type = delegation_type;
1291 status = nfs4_open_recover(opendata, state);
c6d00e63 1292 nfs4_opendata_put(opendata);
1da177e4
LT		 1293 return status;
1294}
1295
539cd03a 1296static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1297{
1298 struct nfs_server *server = NFS_SERVER(state->inode);
1299 struct nfs4_exception exception = { };
1300 int err;
1301 do {
539cd03a 1302 err = _nfs4_do_open_reclaim(ctx, state);
168667c4 1303 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1304 break;
1305 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1306 } while (exception.retry);
1307 return err;
1308}
1309
864472e9
TM		 1310static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1311{
1312 struct nfs_open_context *ctx;
1313 int ret;
1314
1315 ctx = nfs4_state_find_open_context(state);
1316 if (IS_ERR(ctx))
1317 return PTR_ERR(ctx);
539cd03a 1318 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1319 put_nfs_open_context(ctx);
1320 return ret;
1321}
1322
13437e12 1323static int _nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4 1324{
e56e0b78 1325 struct nfs4_opendata *opendata;
864472e9 1326 int ret;
1da177e4 1327
6f220ed5
TM		 1328 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1329 if (IS_ERR(opendata))
1330 return PTR_ERR(opendata);
e56e0b78 1331 opendata->o_arg.claim = NFS4_OPEN_CLAIM_DELEGATE_CUR;
f597c537 1332 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
864472e9 1333 ret = nfs4_open_recover(opendata, state);
c6d00e63 1334 nfs4_opendata_put(opendata);
864472e9 1335 return ret;
1da177e4
LT		 1336}
1337
13437e12 1338int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1da177e4
LT		 1339{
1340 struct nfs4_exception exception = { };
539cd03a 1341 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4
LT		 1342 int err;
1343 do {
13437e12 1344 err = _nfs4_open_delegation_recall(ctx, state, stateid);
1da177e4
LT		 1345 switch (err) {
1346 case 0:
965b5d67
TM		 1347 case -ENOENT:
1348 case -ESTALE:
1349 goto out;
bcfa49f6
RL		 1350 case -NFS4ERR_BADSESSION:
1351 case -NFS4ERR_BADSLOT:
1352 case -NFS4ERR_BAD_HIGH_SLOT:
1353 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1354 case -NFS4ERR_DEADSESSION:
9f594791 1355 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
bcfa49f6 1356 goto out;
1da177e4
LT		 1357 case -NFS4ERR_STALE_CLIENTID:
1358 case -NFS4ERR_STALE_STATEID:
1359 case -NFS4ERR_EXPIRED:
1360 /* Don't recall a delegation if it was lost */
0400a6b0 1361 nfs4_schedule_lease_recovery(server->nfs_client);
965b5d67
TM		 1362 goto out;
1363 case -ERESTARTSYS:
1364 /*
1365 * The show must go on: exit, but mark the
1366 * stateid as needing recovery.
1367 */
a1d0b5ee 1368 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 1369 case -NFS4ERR_ADMIN_REVOKED:
1370 case -NFS4ERR_BAD_STATEID:
a1d0b5ee
TM		 1371 nfs_inode_find_state_and_recover(state->inode,
1372 stateid);
0400a6b0 1373 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 1374 case -ENOMEM:
1375 err = 0;
1376 goto out;
1da177e4
LT		 1377 }
1378 err = nfs4_handle_exception(server, err, &exception);
1379 } while (exception.retry);
965b5d67 1380out:
1da177e4
LT		 1381 return err;
1382}
1383
cdd4e68b
TM		 1384static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1385{
1386 struct nfs4_opendata *data = calldata;
1387
1388 data->rpc_status = task->tk_status;
26e976a8 1389 if (data->rpc_status == 0) {
f597c537 1390 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1391 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1392 renew_lease(data->o_res.server, data->timestamp);
3e309914 1393 data->rpc_done = 1;
26e976a8 1394 }
cdd4e68b
TM		 1395}
1396
1397static void nfs4_open_confirm_release(void *calldata)
1398{
1399 struct nfs4_opendata *data = calldata;
1400 struct nfs4_state *state = NULL;
1401
1402 /* If this request hasn't been cancelled, do nothing */
1403 if (data->cancelled == 0)
1404 goto out_free;
1405 /* In case of error, no cleanup! */
3e309914 1406 if (!data->rpc_done)
cdd4e68b 1407 goto out_free;
cdd4e68b 1408 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1409 if (!IS_ERR(state))
643168c2 1410 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1411out_free:
c6d00e63 1412 nfs4_opendata_put(data);
cdd4e68b
TM		 1413}
1414
1415static const struct rpc_call_ops nfs4_open_confirm_ops = {
cdd4e68b
TM		 1416 .rpc_call_done = nfs4_open_confirm_done,
1417 .rpc_release = nfs4_open_confirm_release,
1418};
1419
1420/*
1421 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1422 */
1423static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1424{
1425 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1426 struct rpc_task *task;
5138fde0
TM		 1427 struct rpc_message msg = {
1428 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1429 .rpc_argp = &data->c_arg,
1430 .rpc_resp = &data->c_res,
1431 .rpc_cred = data->owner->so_cred,
1432 };
c970aa85
TM		 1433 struct rpc_task_setup task_setup_data = {
1434 .rpc_client = server->client,
5138fde0 1435 .rpc_message = &msg,
c970aa85
TM		 1436 .callback_ops = &nfs4_open_confirm_ops,
1437 .callback_data = data,
101070ca 1438 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1439 .flags = RPC_TASK_ASYNC,
1440 };
1da177e4
LT		 1441 int status;
1442
c6d00e63 1443 kref_get(&data->kref);
3e309914
TM		 1444 data->rpc_done = 0;
1445 data->rpc_status = 0;
5138fde0 1446 data->timestamp = jiffies;
c970aa85 1447 task = rpc_run_task(&task_setup_data);
7a1218a2 1448 if (IS_ERR(task))
cdd4e68b 1449 return PTR_ERR(task);
cdd4e68b
TM		 1450 status = nfs4_wait_for_completion_rpc_task(task);
1451 if (status != 0) {
1452 data->cancelled = 1;
1453 smp_wmb();
1454 } else
1455 status = data->rpc_status;
e6b3c4db 1456 rpc_put_task(task);
1da177e4
LT		 1457 return status;
1458}
1459
24ac23ab 1460static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1461{
24ac23ab
TM		 1462 struct nfs4_opendata *data = calldata;
1463 struct nfs4_state_owner *sp = data->owner;
5138fde0 1464
24ac23ab
TM		 1465 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
1466 return;
aac00a8d
TM		 1467 /*
1468 * Check if we still need to send an OPEN call, or if we can use
1469 * a delegation instead.
1470 */
1471 if (data->state != NULL) {
1472 struct nfs_delegation *delegation;
1473
dc0b027d 1474 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1475 goto out_no_action;
aac00a8d
TM		 1476 rcu_read_lock();
1477 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6
TM		 1478 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
1479 can_open_delegated(delegation, data->o_arg.fmode))
1480 goto unlock_no_action;
aac00a8d
TM		 1481 rcu_read_unlock();
1482 }
95b72eb0 1483 /* Update client id. */
1f0e890d 1484 data->o_arg.clientid = sp->so_server->nfs_client->cl_clientid;
6f220ed5 1485 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS) {
5138fde0 1486 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
e23008ec 1487 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
6f220ed5
TM		 1488 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1489 }
26e976a8 1490 data->timestamp = jiffies;
035168ab 1491 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1492 &data->o_arg.seq_args,
2240a9e2
TM		 1493 &data->o_res.seq_res,
1494 task) != 0)
1495 nfs_release_seqid(data->o_arg.seqid);
6ee41268 1496 return;
652f89f6
TM		 1497unlock_no_action:
1498 rcu_read_unlock();
6ee41268
TM		 1499out_no_action:
1500 task->tk_action = NULL;
b75ad4cd 1501 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1502}
1503
24ac23ab
TM		 1504static void nfs4_open_done(struct rpc_task *task, void *calldata)
1505{
1506 struct nfs4_opendata *data = calldata;
1da177e4 1507
24ac23ab 1508 data->rpc_status = task->tk_status;
d898528c 1509
14516c3a
TM		 1510 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1511 return;
d898528c 1512
24ac23ab 1513 if (task->tk_status == 0) {
807d66d8
TM		 1514 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1515 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1516 case S_IFREG:
1517 break;
1518 case S_IFLNK:
24ac23ab 1519 data->rpc_status = -ELOOP;
6f926b5b
TM		 1520 break;
1521 case S_IFDIR:
24ac23ab 1522 data->rpc_status = -EISDIR;
6f926b5b
TM		 1523 break;
1524 default:
24ac23ab 1525 data->rpc_status = -ENOTDIR;
807d66d8 1526 }
6f926b5b 1527 }
26e976a8 1528 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1529 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1530 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1531 }
3e309914 1532 data->rpc_done = 1;
24ac23ab 1533}
6f926b5b 1534
24ac23ab
TM		 1535static void nfs4_open_release(void *calldata)
1536{
1537 struct nfs4_opendata *data = calldata;
1538 struct nfs4_state *state = NULL;
1539
1540 /* If this request hasn't been cancelled, do nothing */
1541 if (data->cancelled == 0)
1542 goto out_free;
1543 /* In case of error, no cleanup! */
3e309914 1544 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1545 goto out_free;
1546 /* In case we need an open_confirm, no cleanup! */
1547 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1548 goto out_free;
24ac23ab 1549 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1550 if (!IS_ERR(state))
643168c2 1551 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1552out_free:
c6d00e63 1553 nfs4_opendata_put(data);
24ac23ab
TM		 1554}
1555
1556static const struct rpc_call_ops nfs4_open_ops = {
1557 .rpc_call_prepare = nfs4_open_prepare,
1558 .rpc_call_done = nfs4_open_done,
1559 .rpc_release = nfs4_open_release,
1560};
1561
b257957e 1562static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1563{
1564 struct inode *dir = data->dir->d_inode;
1565 struct nfs_server *server = NFS_SERVER(dir);
1566 struct nfs_openargs *o_arg = &data->o_arg;
1567 struct nfs_openres *o_res = &data->o_res;
1568 struct rpc_task *task;
5138fde0
TM		 1569 struct rpc_message msg = {
1570 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1571 .rpc_argp = o_arg,
1572 .rpc_resp = o_res,
1573 .rpc_cred = data->owner->so_cred,
1574 };
c970aa85
TM		 1575 struct rpc_task_setup task_setup_data = {
1576 .rpc_client = server->client,
5138fde0 1577 .rpc_message = &msg,
c970aa85
TM		 1578 .callback_ops = &nfs4_open_ops,
1579 .callback_data = data,
101070ca 1580 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1581 .flags = RPC_TASK_ASYNC,
1582 };
24ac23ab
TM		 1583 int status;
1584
9d12b216 1585 nfs41_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1586 kref_get(&data->kref);
3e309914
TM		 1587 data->rpc_done = 0;
1588 data->rpc_status = 0;
2ced46c2 1589 data->cancelled = 0;
b257957e 1590 if (isrecover)
8fe72bac 1591 nfs4_set_sequence_privileged(&o_arg->seq_args);
c970aa85 1592 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1593 if (IS_ERR(task))
1594 return PTR_ERR(task);
1595 status = nfs4_wait_for_completion_rpc_task(task);
1596 if (status != 0) {
1597 data->cancelled = 1;
1598 smp_wmb();
1599 } else
1600 status = data->rpc_status;
1601 rpc_put_task(task);
1602
1603 return status;
1604}
1605
1606static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1607{
1608 struct inode *dir = data->dir->d_inode;
1609 struct nfs_openres *o_res = &data->o_res;
1610 int status;
1611
1612 status = nfs4_run_open_task(data, 1);
1613 if (status != 0 || !data->rpc_done)
1614 return status;
1615
6926afd1
TM		 1616 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1617
b257957e
AB		 1618 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1619 status = _nfs4_proc_open_confirm(data);
1620 if (status != 0)
1621 return status;
1622 }
1623
1624 return status;
1625}
1626
6168f62c
WAA		 1627static int nfs4_opendata_access(struct rpc_cred *cred,
1628 struct nfs4_opendata *opendata,
1629 struct nfs4_state *state, fmode_t fmode)
1630{
1631 struct nfs_access_entry cache;
1632 u32 mask;
1633
1634 /* access call failed or for some reason the server doesn't
1635 * support any access modes -- defer access call until later */
1636 if (opendata->o_res.access_supported == 0)
1637 return 0;
1638
1639 mask = 0;
bbd3a8ee
WAA		 1640 /* don't check MAY_WRITE - a newly created file may not have
1641 * write mode bits, but POSIX allows the creating process to write */
6168f62c
WAA		 1642 if (fmode & FMODE_READ)
1643 mask |= MAY_READ;
6168f62c
WAA		 1644 if (fmode & FMODE_EXEC)
1645 mask |= MAY_EXEC;
1646
1647 cache.cred = cred;
1648 cache.jiffies = jiffies;
1649 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1650 nfs_access_add_cache(state->inode, &cache);
1651
bbd3a8ee 1652 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1653 return 0;
1654
1655 /* even though OPEN succeeded, access is denied. Close the file */
1656 nfs4_close_state(state, fmode);
998f40b5 1657 return -EACCES;
6168f62c
WAA		 1658}
1659
b257957e
AB		 1660/*
1661 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1662 */
1663static int _nfs4_proc_open(struct nfs4_opendata *data)
1664{
1665 struct inode *dir = data->dir->d_inode;
1666 struct nfs_server *server = NFS_SERVER(dir);
1667 struct nfs_openargs *o_arg = &data->o_arg;
1668 struct nfs_openres *o_res = &data->o_res;
1669 int status;
1670
1671 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1672 if (!data->rpc_done)
1673 return status;
1674 if (status != 0) {
1675 if (status == -NFS4ERR_BADNAME &&
1676 !(o_arg->open_flags & O_CREAT))
1677 return -ENOENT;
24ac23ab 1678 return status;
08ef7bd3 1679 }
24ac23ab 1680
6926afd1
TM		 1681 nfs_fattr_map_and_free_names(server, &data->f_attr);
1682
90ff0c54 1683 if (o_arg->open_flags & O_CREAT)
56ae19f3 1684 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1685 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1686 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1687 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1688 status = _nfs4_proc_open_confirm(data);
1da177e4 1689 if (status != 0)
24ac23ab 1690 return status;
1da177e4
LT		 1691 }
1692 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
9936781d 1693 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr);
24ac23ab 1694 return 0;
1da177e4
LT		 1695}
1696
d83217c1
AA		 1697static int nfs4_recover_expired_lease(struct nfs_server *server)
1698{
1699 return nfs4_client_recover_expired_lease(server->nfs_client);
1700}
1701
1da177e4
LT		 1702/*
1703 * OPEN_EXPIRED:
1704 * reclaim state on the server after a network partition.
1705 * Assumes caller holds the appropriate lock
1706 */
539cd03a 1707static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1708{
e56e0b78 1709 struct nfs4_opendata *opendata;
864472e9 1710 int ret;
1da177e4 1711
6f220ed5
TM		 1712 opendata = nfs4_open_recoverdata_alloc(ctx, state);
1713 if (IS_ERR(opendata))
1714 return PTR_ERR(opendata);
864472e9 1715 ret = nfs4_open_recover(opendata, state);
35d05778 1716 if (ret == -ESTALE)
3d4ff43d 1717 d_drop(ctx->dentry);
c6d00e63 1718 nfs4_opendata_put(opendata);
864472e9 1719 return ret;
1da177e4
LT		 1720}
1721
a9ed2e25 1722static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1723{
539cd03a 1724 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1725 struct nfs4_exception exception = { };
1726 int err;
1727
1728 do {
539cd03a 1729 err = _nfs4_open_expired(ctx, state);
a9ed2e25
TM		 1730 switch (err) {
1731 default:
1732 goto out;
1733 case -NFS4ERR_GRACE:
1734 case -NFS4ERR_DELAY:
1735 nfs4_handle_exception(server, err, &exception);
1736 err = 0;
1737 }
202b50dc 1738 } while (exception.retry);
a9ed2e25 1739out:
202b50dc
TM		 1740 return err;
1741}
1742
1da177e4
LT		 1743static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1744{
1da177e4 1745 struct nfs_open_context *ctx;
864472e9 1746 int ret;
1da177e4 1747
864472e9
TM		 1748 ctx = nfs4_state_find_open_context(state);
1749 if (IS_ERR(ctx))
1750 return PTR_ERR(ctx);
539cd03a 1751 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 1752 put_nfs_open_context(ctx);
1753 return ret;
1da177e4
LT		 1754}
1755
f062eb6c 1756#if defined(CONFIG_NFS_V4_1)
3e60ffdd 1757static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 1758{
f062eb6c 1759 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd
CL		 1760 nfs4_stateid *stateid = &state->stateid;
1761 int status;
1762
1763 /* If a state reset has been done, test_stateid is unneeded */
1764 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1765 return;
1766
1767 status = nfs41_test_stateid(server, stateid);
1768 if (status != NFS_OK) {
1769 /* Free the stateid unless the server explicitly
1770 * informs us the stateid is unrecognized. */
1771 if (status != -NFS4ERR_BAD_STATEID)
1772 nfs41_free_stateid(server, stateid);
6938867e 1773 nfs_remove_bad_delegation(state->inode);
3e60ffdd 1774
6938867e
BS		 1775 write_seqlock(&state->seqlock);
1776 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1777 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 1778 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1779 }
1780}
1781
1782/**
1783 * nfs41_check_open_stateid - possibly free an open stateid
1784 *
1785 * @state: NFSv4 state for an inode
1786 *
1787 * Returns NFS_OK if recovery for this stateid is now finished.
1788 * Otherwise a negative NFS4ERR value is returned.
1789 */
1790static int nfs41_check_open_stateid(struct nfs4_state *state)
1791{
1792 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 1793 nfs4_stateid *stateid = &state->open_stateid;
3e60ffdd
CL		 1794 int status;
1795
1796 /* If a state reset has been done, test_stateid is unneeded */
1797 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
1798 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
1799 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
1800 return -NFS4ERR_BAD_STATEID;
1801
1802 status = nfs41_test_stateid(server, stateid);
1803 if (status != NFS_OK) {
1804 /* Free the stateid unless the server explicitly
1805 * informs us the stateid is unrecognized. */
1806 if (status != -NFS4ERR_BAD_STATEID)
1807 nfs41_free_stateid(server, stateid);
1808
1809 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1810 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1811 clear_bit(NFS_O_RDWR_STATE, &state->flags);
b01dd1d8
BS		 1812 }
1813 return status;
1814}
1815
1816static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
1817{
eb64cf96 1818 int status;
b01dd1d8 1819
3e60ffdd
CL		 1820 nfs41_clear_delegation_stateid(state);
1821 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 1822 if (status != NFS_OK)
1823 status = nfs4_open_expired(sp, state);
1824 return status;
f062eb6c
BS		 1825}
1826#endif
1827
aa53ed54
JL		 1828/*
1829 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1830 * fields corresponding to attributes that were used to store the verifier.
1831 * Make sure we clobber those fields in the later setattr call
1832 */
1833static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
1834{
1835 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
1836 !(sattr->ia_valid & ATTR_ATIME_SET))
1837 sattr->ia_valid |= ATTR_ATIME;
1838
1839 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
1840 !(sattr->ia_valid & ATTR_MTIME_SET))
1841 sattr->ia_valid |= ATTR_MTIME;
1842}
1843
1da177e4 1844/*
24ac23ab 1845 * Returns a referenced nfs4_state
1da177e4 1846 */
82be417a
AA		 1847static int _nfs4_do_open(struct inode *dir,
1848 struct dentry *dentry,
1849 fmode_t fmode,
1850 int flags,
1851 struct iattr *sattr,
1852 struct rpc_cred *cred,
1853 struct nfs4_state **res,
1854 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1855{
1856 struct nfs4_state_owner *sp;
1857 struct nfs4_state *state = NULL;
1858 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 1859 struct nfs4_opendata *opendata;
aac00a8d 1860 int status;
1da177e4
LT		 1861
1862 /* Protect against reboot recovery conflicts */
1da177e4 1863 status = -ENOMEM;
d1e284d5
TM		 1864 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
1865 if (sp == NULL) {
1da177e4
LT		 1866 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1867 goto out_err;
1868 }
58d9714a
TM		 1869 status = nfs4_recover_expired_lease(server);
1870 if (status != 0)
b4454fe1 1871 goto err_put_state_owner;
82a2c1b7
AV		 1872 if (dentry->d_inode != NULL)
1873 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 1874 status = -ENOMEM;
82a2c1b7 1875 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr, GFP_KERNEL);
e56e0b78 1876 if (opendata == NULL)
95d35cb4 1877 goto err_put_state_owner;
1da177e4 1878
82be417a
AA		 1879 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
1880 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
1881 if (!opendata->f_attr.mdsthreshold)
1882 goto err_opendata_put;
1549210f 1883 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 1884 }
82a2c1b7
AV		 1885 if (dentry->d_inode != NULL)
1886 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 1887
24ac23ab 1888 status = _nfs4_proc_open(opendata);
1da177e4 1889 if (status != 0)
c6d00e63 1890 goto err_opendata_put;
1da177e4 1891
24ac23ab 1892 state = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1893 status = PTR_ERR(state);
1894 if (IS_ERR(state))
c6d00e63 1895 goto err_opendata_put;
0df5dd4a 1896 if (server->caps & NFS_CAP_POSIX_LOCK)
8e469ebd 1897 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
0ab64e0e 1898
6168f62c
WAA		 1899 status = nfs4_opendata_access(cred, opendata, state, fmode);
1900 if (status != 0)
1901 goto err_opendata_put;
1902
0ab64e0e
TM		 1903 if (opendata->o_arg.open_flags & O_EXCL) {
1904 nfs4_exclusive_attrset(opendata, sattr);
1905
1906 nfs_fattr_init(opendata->o_res.f_attr);
1907 status = nfs4_do_setattr(state->inode, cred,
1908 opendata->o_res.f_attr, sattr,
1909 state);
1910 if (status == 0)
1911 nfs_setattr_update_inode(state->inode, sattr);
1912 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
1913 }
82be417a
AA		 1914
1915 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
1916 *ctx_th = opendata->f_attr.mdsthreshold;
1917 else
1918 kfree(opendata->f_attr.mdsthreshold);
1919 opendata->f_attr.mdsthreshold = NULL;
1920
c6d00e63 1921 nfs4_opendata_put(opendata);
1da177e4 1922 nfs4_put_state_owner(sp);
1da177e4
LT		 1923 *res = state;
1924 return 0;
c6d00e63 1925err_opendata_put:
82be417a 1926 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 1927 nfs4_opendata_put(opendata);
e56e0b78
TM		 1928err_put_state_owner:
1929 nfs4_put_state_owner(sp);
1da177e4 1930out_err:
1da177e4
LT		 1931 *res = NULL;
1932 return status;
1933}
1934
1935
82be417a
AA		 1936static struct nfs4_state *nfs4_do_open(struct inode *dir,
1937 struct dentry *dentry,
1938 fmode_t fmode,
1939 int flags,
1940 struct iattr *sattr,
1941 struct rpc_cred *cred,
1942 struct nfs4_threshold **ctx_th)
1da177e4
LT		 1943{
1944 struct nfs4_exception exception = { };
1945 struct nfs4_state *res;
1946 int status;
1947
6168f62c 1948 fmode &= FMODE_READ|FMODE_WRITE|FMODE_EXEC;
1da177e4 1949 do {
82be417a
AA		 1950 status = _nfs4_do_open(dir, dentry, fmode, flags, sattr, cred,
1951 &res, ctx_th);
1da177e4
LT		 1952 if (status == 0)
1953 break;
1954 /* NOTE: BAD_SEQID means the server and client disagree about the
1955 * book-keeping w.r.t. state-changing operations
1956 * (OPEN/CLOSE/LOCK/LOCKU...)
1957 * It is actually a sign of a bug on the client or on the server.
1958 *
1959 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 1960 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 1961 * have unhashed the old state_owner for us, and that we can
1962 * therefore safely retry using a new one. We should still warn
1963 * the user though...
1964 */
1965 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 1966 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 1967 " returned a bad sequence-id error!\n",
1968 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 1969 exception.retry = 1;
1970 continue;
1971 }
550f5747
TM		 1972 /*
1973 * BAD_STATEID on OPEN means that the server cancelled our
1974 * state before it received the OPEN_CONFIRM.
1975 * Recover by retrying the request as per the discussion
1976 * on Page 181 of RFC3530.
1977 */
1978 if (status == -NFS4ERR_BAD_STATEID) {
1979 exception.retry = 1;
1980 continue;
1981 }
aac00a8d
TM		 1982 if (status == -EAGAIN) {
1983 /* We must have found a delegation */
1984 exception.retry = 1;
1985 continue;
1986 }
1da177e4
LT		 1987 res = ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir),
1988 status, &exception));
1989 } while (exception.retry);
1990 return res;
1991}
1992
659bfcd6
TM		 1993static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
1994 struct nfs_fattr *fattr, struct iattr *sattr,
1995 struct nfs4_state *state)
1da177e4 1996{
3e4f6290 1997 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 1998 struct nfs_setattrargs arg = {
3e4f6290 1999 .fh = NFS_FH(inode),
1da177e4
LT		 2000 .iap = sattr,
2001 .server = server,
2002 .bitmask = server->attr_bitmask,
2003 };
2004 struct nfs_setattrres res = {
2005 .fattr = fattr,
2006 .server = server,
2007 };
2008 struct rpc_message msg = {
659bfcd6
TM		 2009 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2010 .rpc_argp = &arg,
2011 .rpc_resp = &res,
2012 .rpc_cred = cred,
1da177e4 2013 };
26e976a8 2014 unsigned long timestamp = jiffies;
65e4308d 2015 int status;
1da177e4 2016
0e574af1 2017 nfs_fattr_init(fattr);
1da177e4 2018
4fc8796d 2019 if (state != NULL) {
2a369153
TM		 2020 struct nfs_lockowner lockowner = {
2021 .l_owner = current->files,
2022 .l_pid = current->tgid,
2023 };
4fc8796d 2024 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2025 &lockowner);
4fc8796d
TM		 2026 } else if (nfs4_copy_delegation_stateid(&arg.stateid, inode,
2027 FMODE_WRITE)) {
3e4f6290 2028 /* Use that stateid */
08e9eac4 2029 } else
f597c537 2030 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2031
7c513058 2032 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2033 if (status == 0 && state != NULL)
2034 renew_lease(server, timestamp);
65e4308d 2035 return status;
1da177e4
LT		 2036}
2037
659bfcd6
TM		 2038static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2039 struct nfs_fattr *fattr, struct iattr *sattr,
2040 struct nfs4_state *state)
1da177e4 2041{
3e4f6290 2042 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2043 struct nfs4_exception exception = {
2044 .state = state,
3114ea7a 2045 .inode = inode,
a1d0b5ee 2046 };
1da177e4
LT		 2047 int err;
2048 do {
451146be
TM		 2049 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state);
2050 switch (err) {
2051 case -NFS4ERR_OPENMODE:
2052 if (state && !(state->state & FMODE_WRITE)) {
2053 err = -EBADF;
2054 if (sattr->ia_valid & ATTR_OPEN)
2055 err = -EACCES;
2056 goto out;
2057 }
2058 }
2059 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2060 } while (exception.retry);
451146be 2061out:
1da177e4
LT		 2062 return err;
2063}
2064
2065struct nfs4_closedata {
2066 struct inode *inode;
2067 struct nfs4_state *state;
2068 struct nfs_closeargs arg;
2069 struct nfs_closeres res;
516a6af6 2070 struct nfs_fattr fattr;
26e976a8 2071 unsigned long timestamp;
f7e8917a
FI		 2072 bool roc;
2073 u32 roc_barrier;
1da177e4
LT		 2074};
2075
963d8fe5 2076static void nfs4_free_closedata(void *data)
9512135d 2077{
963d8fe5
TM		 2078 struct nfs4_closedata *calldata = data;
2079 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2080 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2081
f7e8917a
FI		 2082 if (calldata->roc)
2083 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2084 nfs4_put_open_state(calldata->state);
2085 nfs_free_seqid(calldata->arg.seqid);
9512135d 2086 nfs4_put_state_owner(sp);
324d003b 2087 nfs_sb_deactive_async(sb);
9512135d
TM		 2088 kfree(calldata);
2089}
2090
88069f77
TM		 2091static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2092 fmode_t fmode)
2093{
2094 spin_lock(&state->owner->so_lock);
2095 if (!(fmode & FMODE_READ))
2096 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2097 if (!(fmode & FMODE_WRITE))
2098 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2099 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2100 spin_unlock(&state->owner->so_lock);
2101}
2102
963d8fe5 2103static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2104{
963d8fe5 2105 struct nfs4_closedata *calldata = data;
1da177e4 2106 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2107 struct nfs_server *server = NFS_SERVER(calldata->inode);
2108
a3ca5651 2109 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2110 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2111 return;
1da177e4
LT		 2112 /* hmm. we are done with the inode, and in the process of freeing
2113 * the state_owner. we keep this around to process errors
2114 */
1da177e4
LT		 2115 switch (task->tk_status) {
2116 case 0:
f7e8917a
FI		 2117 if (calldata->roc)
2118 pnfs_roc_set_barrier(state->inode,
2119 calldata->roc_barrier);
45328c35 2120 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2121 renew_lease(server, calldata->timestamp);
88069f77
TM		 2122 nfs4_close_clear_stateid_flags(state,
2123 calldata->arg.fmode);
1da177e4
LT		 2124 break;
2125 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2126 case -NFS4ERR_OLD_STATEID:
2127 case -NFS4ERR_BAD_STATEID:
1da177e4 2128 case -NFS4ERR_EXPIRED:
dc0b027d 2129 if (calldata->arg.fmode == 0)
9e33bed5 2130 break;
1da177e4 2131 default:
72211dbe
TM		 2132 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2133 rpc_restart_call_prepare(task);
1da177e4 2134 }
72211dbe 2135 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2136 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2137 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2138}
2139
4ce70ada 2140static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2141{
4ce70ada 2142 struct nfs4_closedata *calldata = data;
9512135d 2143 struct nfs4_state *state = calldata->state;
7fdab069 2144 struct inode *inode = calldata->inode;
88069f77 2145 int call_close = 0;
9512135d 2146
a3ca5651 2147 dprintk("%s: begin!\n", __func__);
963d8fe5 2148 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
9512135d 2149 return;
003707c7 2150
88069f77
TM		 2151 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2152 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2153 spin_lock(&state->owner->so_lock);
003707c7 2154 /* Calculate the change in open mode */
e7616923 2155 if (state->n_rdwr == 0) {
003707c7 2156 if (state->n_rdonly == 0) {
88069f77
TM		 2157 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2158 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2159 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2160 }
2161 if (state->n_wronly == 0) {
88069f77
TM		 2162 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2163 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2164 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2165 }
e7616923 2166 }
4cecb76f 2167 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2168
2169 if (!call_close) {
963d8fe5
TM		 2170 /* Note: exit _without_ calling nfs4_close_done */
2171 task->tk_action = NULL;
b75ad4cd 2172 nfs4_sequence_done(task, &calldata->res.seq_res);
a3ca5651 2173 goto out;
9512135d 2174 }
88069f77 2175
f7e8917a 2176 if (calldata->arg.fmode == 0) {
88069f77 2177 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2178 if (calldata->roc &&
7fdab069 2179 pnfs_roc_drain(inode, &calldata->roc_barrier, task))
a3ca5651 2180 goto out;
f7e8917a 2181 }
88069f77 2182
516a6af6 2183 nfs_fattr_init(calldata->res.fattr);
26e976a8 2184 calldata->timestamp = jiffies;
7fdab069 2185 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2186 &calldata->arg.seq_args,
2187 &calldata->res.seq_res,
2240a9e2
TM		 2188 task) != 0)
2189 nfs_release_seqid(calldata->arg.seqid);
a3ca5651
CL		 2190out:
2191 dprintk("%s: done!\n", __func__);
1da177e4
LT		 2192}
2193
963d8fe5 2194static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2195 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2196 .rpc_call_done = nfs4_close_done,
2197 .rpc_release = nfs4_free_closedata,
2198};
2199
1da177e4
LT		 2200/*
2201 * It is possible for data to be read/written from a mem-mapped file
2202 * after the sys_close call (which hits the vfs layer as a flush).
2203 * This means that we can't safely call nfsv4 close on a file until
2204 * the inode is cleared. This in turn means that we are not good
2205 * NFSv4 citizens - we do not indicate to the server to update the file's
2206 * share state even when we are done with one of the three share
2207 * stateid's in the inode.
2208 *
2209 * NOTE: Caller must be holding the sp->so_owner semaphore!
2210 */
1f7977c1 2211int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2212{
4a35bd41 2213 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2214 struct nfs4_closedata *calldata;
b39e625b
TM		 2215 struct nfs4_state_owner *sp = state->owner;
2216 struct rpc_task *task;
5138fde0
TM		 2217 struct rpc_message msg = {
2218 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2219 .rpc_cred = state->owner->so_cred,
2220 };
c970aa85
TM		 2221 struct rpc_task_setup task_setup_data = {
2222 .rpc_client = server->client,
5138fde0 2223 .rpc_message = &msg,
c970aa85 2224 .callback_ops = &nfs4_close_ops,
101070ca 2225 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2226 .flags = RPC_TASK_ASYNC,
2227 };
9512135d 2228 int status = -ENOMEM;
1da177e4 2229
8535b2be 2230 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2231 if (calldata == NULL)
9512135d 2232 goto out;
9d12b216 2233 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2234 calldata->inode = state->inode;
1da177e4 2235 calldata->state = state;
4a35bd41 2236 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2237 calldata->arg.stateid = &state->open_stateid;
1da177e4 2238 /* Serialization for the sequence id */
8535b2be 2239 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2240 if (calldata->arg.seqid == NULL)
2241 goto out_free_calldata;
dc0b027d 2242 calldata->arg.fmode = 0;
a65318bf 2243 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2244 calldata->res.fattr = &calldata->fattr;
c1d51931 2245 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2246 calldata->res.server = server;
1f7977c1 2247 calldata->roc = pnfs_roc(state->inode);
643168c2 2248 nfs_sb_active(calldata->inode->i_sb);
9512135d 2249
1174dd1f
TM		 2250 msg.rpc_argp = &calldata->arg;
2251 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2252 task_setup_data.callback_data = calldata;
2253 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2254 if (IS_ERR(task))
2255 return PTR_ERR(task);
a49c3c77
TM		 2256 status = 0;
2257 if (wait)
2258 status = rpc_wait_for_completion_task(task);
b39e625b 2259 rpc_put_task(task);
a49c3c77 2260 return status;
9512135d
TM		 2261out_free_calldata:
2262 kfree(calldata);
2263out:
b39e625b
TM		 2264 nfs4_put_open_state(state);
2265 nfs4_put_state_owner(sp);
9512135d 2266 return status;
1da177e4
LT		 2267}
2268
2b484297 2269static struct inode *
cd9a1c0e 2270nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2271{
1da177e4 2272 struct nfs4_state *state;
1da177e4 2273
565277f6 2274 /* Protect against concurrent sillydeletes */
82be417a
AA		 2275 state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr,
2276 ctx->cred, &ctx->mdsthreshold);
f46e0bd3
TM		 2277 if (IS_ERR(state))
2278 return ERR_CAST(state);
cd9a1c0e 2279 ctx->state = state;
f46e0bd3 2280 return igrab(state->inode);
1da177e4
LT		 2281}
2282
1185a552 2283static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2284{
2285 if (ctx->state == NULL)
2286 return;
2287 if (is_sync)
643168c2 2288 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2289 else
643168c2 2290 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2291}
1da177e4
LT		 2292
2293static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2294{
43652ad5
BH		 2295 struct nfs4_server_caps_arg args = {
2296 .fhandle = fhandle,
2297 };
1da177e4
LT		 2298 struct nfs4_server_caps_res res = {};
2299 struct rpc_message msg = {
2300 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2301 .rpc_argp = &args,
1da177e4
LT		 2302 .rpc_resp = &res,
2303 };
2304 int status;
2305
7c513058 2306 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2307 if (status == 0) {
2308 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2309 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2310 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2311 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2312 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2313 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2314 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2315 server->caps |= NFS_CAP_ACLS;
2316 if (res.has_links != 0)
2317 server->caps |= NFS_CAP_HARDLINKS;
2318 if (res.has_symlinks != 0)
2319 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2320 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2321 server->caps |= NFS_CAP_FILEID;
2322 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2323 server->caps |= NFS_CAP_MODE;
2324 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2325 server->caps |= NFS_CAP_NLINK;
2326 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2327 server->caps |= NFS_CAP_OWNER;
2328 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2329 server->caps |= NFS_CAP_OWNER_GROUP;
2330 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2331 server->caps |= NFS_CAP_ATIME;
2332 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2333 server->caps |= NFS_CAP_CTIME;
2334 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2335 server->caps |= NFS_CAP_MTIME;
2336
a65318bf
TM		 2337 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2338 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2339 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2340 server->acl_bitmask = res.acl_bitmask;
264e6351 2341 server->fh_expire_type = res.fh_expire_type;
1da177e4 2342 }
cccef3b9 2343
1da177e4
LT		 2344 return status;
2345}
2346
55a97593 2347int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2348{
2349 struct nfs4_exception exception = { };
2350 int err;
2351 do {
2352 err = nfs4_handle_exception(server,
2353 _nfs4_server_capabilities(server, fhandle),
2354 &exception);
2355 } while (exception.retry);
2356 return err;
2357}
2358
2359static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2360 struct nfs_fsinfo *info)
2361{
1da177e4
LT		 2362 struct nfs4_lookup_root_arg args = {
2363 .bitmask = nfs4_fattr_bitmap,
2364 };
2365 struct nfs4_lookup_res res = {
2366 .server = server,
0e574af1 2367 .fattr = info->fattr,
1da177e4
LT		 2368 .fh = fhandle,
2369 };
2370 struct rpc_message msg = {
2371 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2372 .rpc_argp = &args,
2373 .rpc_resp = &res,
2374 };
008f55d0 2375
0e574af1 2376 nfs_fattr_init(info->fattr);
7c513058 2377 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2378}
2379
2380static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2381 struct nfs_fsinfo *info)
2382{
2383 struct nfs4_exception exception = { };
2384 int err;
2385 do {
fb8a5ba8
BS		 2386 err = _nfs4_lookup_root(server, fhandle, info);
2387 switch (err) {
2388 case 0:
2389 case -NFS4ERR_WRONGSEC:
05e9cfb4 2390 goto out;
fb8a5ba8
BS		 2391 default:
2392 err = nfs4_handle_exception(server, err, &exception);
2393 }
1da177e4 2394 } while (exception.retry);
05e9cfb4 2395out:
1da177e4
LT		 2396 return err;
2397}
2398
8f70e95f
BS		 2399static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2400 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2401{
2402 struct rpc_auth *auth;
2403 int ret;
2404
2405 auth = rpcauth_create(flavor, server->client);
e8d920c5 2406 if (IS_ERR(auth)) {
8f70e95f
BS		 2407 ret = -EIO;
2408 goto out;
2409 }
2410 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2411out:
2412 return ret;
2413}
2414
801a16dc 2415static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2416 struct nfs_fsinfo *info)
1da177e4 2417{
8f70e95f 2418 int i, len, status = 0;
0fabee24 2419 rpc_authflavor_t flav_array[NFS_MAX_SECFLAVORS];
1da177e4 2420
6a1a1e34 2421 len = rpcauth_list_flavors(flav_array, ARRAY_SIZE(flav_array));
4ea8fed5
TM		 2422 if (len < 0)
2423 return len;
8f70e95f
BS		 2424
2425 for (i = 0; i < len; i++) {
6a1a1e34
CL		 2426 /* AUTH_UNIX is the default flavor if none was specified,
2427 * thus has already been tried. */
2428 if (flav_array[i] == RPC_AUTH_UNIX)
2429 continue;
2430
8f70e95f 2431 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2432 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2433 continue;
2434 break;
8f70e95f 2435 }
fb8a5ba8
BS		 2436 /*
2437 * -EACCESS could mean that the user doesn't have correct permissions
2438 * to access the mount. It could also mean that we tried to mount
2439 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2440 * existing mount programs don't handle -EACCES very well so it should
2441 * be mapped to -EPERM instead.
2442 */
2443 if (status == -EACCES)
2444 status = -EPERM;
801a16dc
BS		 2445 return status;
2446}
2447
2448/*
2449 * get the file handle for the "/" directory on the server
2450 */
3028eb2b
BS		 2451int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
2452 struct nfs_fsinfo *info)
801a16dc 2453{
fca78d6d 2454 int minor_version = server->nfs_client->cl_minorversion;
801a16dc 2455 int status = nfs4_lookup_root(server, fhandle, info);
fb8a5ba8
BS		 2456 if ((status == -NFS4ERR_WRONGSEC) && !(server->flags & NFS_MOUNT_SECFLAVOUR))
2457 /*
2458 * A status of -NFS4ERR_WRONGSEC will be mapped to -EPERM
2459 * by nfs4_map_errors() as this function exits.
2460 */
fca78d6d 2461 status = nfs_v4_minor_ops[minor_version]->find_root_sec(server, fhandle, info);
1da177e4
LT		 2462 if (status == 0)
2463 status = nfs4_server_capabilities(server, fhandle);
2464 if (status == 0)
2465 status = nfs4_do_fsinfo(server, fhandle, info);
c12e87f4 2466 return nfs4_map_errors(status);
1da177e4
LT		 2467}
2468
bae36241
BS		 2469static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2470 struct nfs_fsinfo *info)
2471{
2472 int error;
2473 struct nfs_fattr *fattr = info->fattr;
2474
2475 error = nfs4_server_capabilities(server, mntfh);
2476 if (error < 0) {
2477 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2478 return error;
2479 }
2480
2481 error = nfs4_proc_getattr(server, mntfh, fattr);
2482 if (error < 0) {
2483 dprintk("nfs4_get_root: getattr error = %d\n", -error);
2484 return error;
2485 }
2486
2487 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2488 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2489 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2490
2491 return error;
2492}
2493
6b97fd3d
MN		 2494/*
2495 * Get locations and (maybe) other attributes of a referral.
2496 * Note that we'll actually follow the referral later when
2497 * we detect fsid mismatch in inode revalidation
2498 */
f05d147f
BS		 2499static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2500 const struct qstr *name, struct nfs_fattr *fattr,
2501 struct nfs_fh *fhandle)
6b97fd3d
MN		 2502{
2503 int status = -ENOMEM;
2504 struct page *page = NULL;
2505 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2506
2507 page = alloc_page(GFP_KERNEL);
2508 if (page == NULL)
2509 goto out;
2510 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2511 if (locations == NULL)
2512 goto out;
2513
f05d147f 2514 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2515 if (status != 0)
2516 goto out;
2517 /* Make sure server returned a different fsid for the referral */
2518 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2519 dprintk("%s: server did not return a different fsid for"
2520 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2521 status = -EIO;
2522 goto out;
2523 }
533eb461
AA		 2524 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2525 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2526
533eb461 2527 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2528 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2529 memset(fhandle, 0, sizeof(struct nfs_fh));
2530out:
2531 if (page)
2532 __free_page(page);
5d7ca35a 2533 kfree(locations);
6b97fd3d
MN		 2534 return status;
2535}
2536
1da177e4
LT		 2537static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2538{
2539 struct nfs4_getattr_arg args = {
2540 .fh = fhandle,
2541 .bitmask = server->attr_bitmask,
2542 };
2543 struct nfs4_getattr_res res = {
2544 .fattr = fattr,
2545 .server = server,
2546 };
2547 struct rpc_message msg = {
2548 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
2549 .rpc_argp = &args,
2550 .rpc_resp = &res,
2551 };
2552
0e574af1 2553 nfs_fattr_init(fattr);
7c513058 2554 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2555}
2556
2557static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2558{
2559 struct nfs4_exception exception = { };
2560 int err;
2561 do {
2562 err = nfs4_handle_exception(server,
2563 _nfs4_proc_getattr(server, fhandle, fattr),
2564 &exception);
2565 } while (exception.retry);
2566 return err;
2567}
2568
2569/*
2570 * The file is not closed if it is opened due to the a request to change
2571 * the size of the file. The open call will not be needed once the
2572 * VFS layer lookup-intents are implemented.
2573 *
2574 * Close is called when the inode is destroyed.
2575 * If we haven't opened the file for O_WRONLY, we
2576 * need to in the size_change case to obtain a stateid.
2577 *
2578 * Got race?
2579 * Because OPEN is always done by name in nfsv4, it is
2580 * possible that we opened a different file by the same
2581 * name. We can recognize this race condition, but we
2582 * can't do anything about it besides returning an error.
2583 *
2584 * This will be fixed with VFS changes (lookup-intent).
2585 */
2586static int
2587nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
2588 struct iattr *sattr)
2589{
08e9eac4 2590 struct inode *inode = dentry->d_inode;
659bfcd6 2591 struct rpc_cred *cred = NULL;
d530838b 2592 struct nfs4_state *state = NULL;
1da177e4
LT		 2593 int status;
2594
8a1636c4
BH		 2595 if (pnfs_ld_layoutret_on_setattr(inode))
2596 pnfs_return_layout(inode);
2597
0e574af1 2598 nfs_fattr_init(fattr);
1da177e4 2599
2669940d
AA		 2600 /* Deal with open(O_TRUNC) */
2601 if (sattr->ia_valid & ATTR_OPEN)
2602 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME|ATTR_OPEN);
2603
2604 /* Optimization: if the end result is no change, don't RPC */
2605 if ((sattr->ia_valid & ~(ATTR_FILE)) == 0)
2606 return 0;
2607
d530838b 2608 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 2609 if (sattr->ia_valid & ATTR_FILE) {
2610 struct nfs_open_context *ctx;
2611
2612 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 2613 if (ctx) {
2614 cred = ctx->cred;
2615 state = ctx->state;
2616 }
659bfcd6 2617 }
08e9eac4 2618
659bfcd6 2619 status = nfs4_do_setattr(inode, cred, fattr, sattr, state);
65e4308d
TM		 2620 if (status == 0)
2621 nfs_setattr_update_inode(inode, sattr);
1da177e4
LT		 2622 return status;
2623}
2624
0c2e53f1
TM		 2625static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
2626 const struct qstr *name, struct nfs_fh *fhandle,
2627 struct nfs_fattr *fattr)
2b3de441 2628{
0c2e53f1 2629 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 2630 int status;
2631 struct nfs4_lookup_arg args = {
2632 .bitmask = server->attr_bitmask,
0c2e53f1 2633 .dir_fh = NFS_FH(dir),
2b3de441
DH		 2634 .name = name,
2635 };
2636 struct nfs4_lookup_res res = {
2637 .server = server,
2638 .fattr = fattr,
2639 .fh = fhandle,
2640 };
2641 struct rpc_message msg = {
2642 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
2643 .rpc_argp = &args,
2644 .rpc_resp = &res,
2645 };
2646
2647 nfs_fattr_init(fattr);
2648
1da177e4 2649 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 2650 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2651 dprintk("NFS reply lookup: %d\n", status);
2652 return status;
2653}
2654
72de53ec 2655static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 2656{
7ebb9315 2657 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 2658 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 2659 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
2660 fattr->nlink = 2;
2661}
2662
72de53ec
BS		 2663static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
2664 struct qstr *name, struct nfs_fh *fhandle,
2665 struct nfs_fattr *fattr)
1da177e4
LT		 2666{
2667 struct nfs4_exception exception = { };
72de53ec 2668 struct rpc_clnt *client = *clnt;
1da177e4
LT		 2669 int err;
2670 do {
72de53ec
BS		 2671 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr);
2672 switch (err) {
08ef7bd3 2673 case -NFS4ERR_BADNAME:
72de53ec
BS		 2674 err = -ENOENT;
2675 goto out;
0c2e53f1 2676 case -NFS4ERR_MOVED:
f05d147f 2677 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 2678 goto out;
0c2e53f1 2679 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 2680 err = -EPERM;
2681 if (client != *clnt)
2682 goto out;
2683
2684 client = nfs4_create_sec_client(client, dir, name);
2685 if (IS_ERR(client))
2686 return PTR_ERR(client);
2687
2688 exception.retry = 1;
2689 break;
2690 default:
2691 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 2692 }
1da177e4 2693 } while (exception.retry);
72de53ec
BS		 2694
2695out:
2696 if (err == 0)
2697 *clnt = client;
2698 else if (client != *clnt)
2699 rpc_shutdown_client(client);
2700
1da177e4
LT		 2701 return err;
2702}
2703
80a16b21 2704static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
72de53ec
BS		 2705 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2706{
2707 int status;
2708 struct rpc_clnt *client = NFS_CLIENT(dir);
2709
2710 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2711 if (client != NFS_CLIENT(dir)) {
2712 rpc_shutdown_client(client);
2713 nfs_fixup_secinfo_attributes(fattr);
2714 }
2715 return status;
2716}
2717
f05d147f
BS		 2718struct rpc_clnt *
2719nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
2720 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
2721{
2722 int status;
2723 struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir));
2724
2725 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr);
2726 if (status < 0) {
2727 rpc_shutdown_client(client);
2728 return ERR_PTR(status);
2729 }
2730 return client;
2731}
2732
1da177e4
LT		 2733static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2734{
76b32999 2735 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 2736 struct nfs4_accessargs args = {
2737 .fh = NFS_FH(inode),
a4980e78 2738 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 2739 };
2740 struct nfs4_accessres res = {
2741 .server = server,
1da177e4 2742 };
1da177e4
LT		 2743 struct rpc_message msg = {
2744 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
2745 .rpc_argp = &args,
2746 .rpc_resp = &res,
2747 .rpc_cred = entry->cred,
2748 };
2749 int mode = entry->mask;
2750 int status;
2751
2752 /*
2753 * Determine which access bits we want to ask for...
2754 */
2755 if (mode & MAY_READ)
2756 args.access |= NFS4_ACCESS_READ;
2757 if (S_ISDIR(inode->i_mode)) {
2758 if (mode & MAY_WRITE)
2759 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
2760 if (mode & MAY_EXEC)
2761 args.access |= NFS4_ACCESS_LOOKUP;
2762 } else {
2763 if (mode & MAY_WRITE)
2764 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
2765 if (mode & MAY_EXEC)
2766 args.access |= NFS4_ACCESS_EXECUTE;
2767 }
c407d41a
TM		 2768
2769 res.fattr = nfs_alloc_fattr();
2770 if (res.fattr == NULL)
2771 return -ENOMEM;
2772
7c513058 2773 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2774 if (!status) {
6168f62c 2775 nfs_access_set_mask(entry, res.access);
c407d41a 2776 nfs_refresh_inode(inode, res.fattr);
1da177e4 2777 }
c407d41a 2778 nfs_free_fattr(res.fattr);
1da177e4
LT		 2779 return status;
2780}
2781
2782static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
2783{
2784 struct nfs4_exception exception = { };
2785 int err;
2786 do {
2787 err = nfs4_handle_exception(NFS_SERVER(inode),
2788 _nfs4_proc_access(inode, entry),
2789 &exception);
2790 } while (exception.retry);
2791 return err;
2792}
2793
2794/*
2795 * TODO: For the time being, we don't try to get any attributes
2796 * along with any of the zero-copy operations READ, READDIR,
2797 * READLINK, WRITE.
2798 *
2799 * In the case of the first three, we want to put the GETATTR
2800 * after the read-type operation -- this is because it is hard
2801 * to predict the length of a GETATTR response in v4, and thus
2802 * align the READ data correctly. This means that the GETATTR
2803 * may end up partially falling into the page cache, and we should
2804 * shift it into the 'tail' of the xdr_buf before processing.
2805 * To do this efficiently, we need to know the total length
2806 * of data received, which doesn't seem to be available outside
2807 * of the RPC layer.
2808 *
2809 * In the case of WRITE, we also want to put the GETATTR after
2810 * the operation -- in this case because we want to make sure
140150db 2811 * we get the post-operation mtime and size.
1da177e4
LT		 2812 *
2813 * Both of these changes to the XDR layer would in fact be quite
2814 * minor, but I decided to leave them for a subsequent patch.
2815 */
2816static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
2817 unsigned int pgbase, unsigned int pglen)
2818{
2819 struct nfs4_readlink args = {
2820 .fh = NFS_FH(inode),
2821 .pgbase = pgbase,
2822 .pglen = pglen,
2823 .pages = &page,
2824 };
f50c7000 2825 struct nfs4_readlink_res res;
1da177e4
LT		 2826 struct rpc_message msg = {
2827 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
2828 .rpc_argp = &args,
f50c7000 2829 .rpc_resp = &res,
1da177e4
LT		 2830 };
2831
7c513058 2832 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2833}
2834
2835static int nfs4_proc_readlink(struct inode *inode, struct page *page,
2836 unsigned int pgbase, unsigned int pglen)
2837{
2838 struct nfs4_exception exception = { };
2839 int err;
2840 do {
2841 err = nfs4_handle_exception(NFS_SERVER(inode),
2842 _nfs4_proc_readlink(inode, page, pgbase, pglen),
2843 &exception);
2844 } while (exception.retry);
2845 return err;
2846}
2847
1da177e4 2848/*
8867fe58 2849 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 2850 */
1da177e4
LT		 2851static int
2852nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 2853 int flags)
1da177e4 2854{
8867fe58 2855 struct nfs_open_context *ctx;
1da177e4 2856 struct nfs4_state *state;
1da177e4
LT		 2857 int status = 0;
2858
8867fe58
MS		 2859 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
2860 if (IS_ERR(ctx))
2861 return PTR_ERR(ctx);
2862
a8a5da99 2863 sattr->ia_mode &= ~current_umask();
8626e4a4
TM		 2864 state = nfs4_do_open(dir, dentry, ctx->mode,
2865 flags, sattr, ctx->cred,
2866 &ctx->mdsthreshold);
d4d9cdcb 2867 d_drop(dentry);
1da177e4
LT		 2868 if (IS_ERR(state)) {
2869 status = PTR_ERR(state);
c0204fd2 2870 goto out;
1da177e4 2871 }
d4d9cdcb 2872 d_add(dentry, igrab(state->inode));
d75340cc 2873 nfs_set_verifier(dentry, nfs_save_change_attribute(dir));
8867fe58 2874 ctx->state = state;
1da177e4 2875out:
8867fe58 2876 put_nfs_open_context(ctx);
1da177e4
LT		 2877 return status;
2878}
2879
2880static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
2881{
16e42959 2882 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 2883 struct nfs_removeargs args = {
1da177e4 2884 .fh = NFS_FH(dir),
26fe5750 2885 .name = *name,
16e42959 2886 };
4fdc17b2 2887 struct nfs_removeres res = {
16e42959 2888 .server = server,
1da177e4 2889 };
1da177e4 2890 struct rpc_message msg = {
4fdc17b2
TM		 2891 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
2892 .rpc_argp = &args,
2893 .rpc_resp = &res,
1da177e4 2894 };
778d2817 2895 int status;
1da177e4 2896
7c513058 2897 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 2898 if (status == 0)
16e42959 2899 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 2900 return status;
2901}
2902
2903static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
2904{
2905 struct nfs4_exception exception = { };
2906 int err;
2907 do {
2908 err = nfs4_handle_exception(NFS_SERVER(dir),
2909 _nfs4_proc_remove(dir, name),
2910 &exception);
2911 } while (exception.retry);
2912 return err;
2913}
2914
e4eff1a6 2915static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 2916{
e4eff1a6
TM		 2917 struct nfs_server *server = NFS_SERVER(dir);
2918 struct nfs_removeargs *args = msg->rpc_argp;
2919 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 2920
e4eff1a6 2921 res->server = server;
1da177e4 2922 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
9d12b216 2923 nfs41_init_sequence(&args->seq_args, &res->seq_res, 1);
1da177e4
LT		 2924}
2925
34e137cc
BS		 2926static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
2927{
d9afbd1b
TM		 2928 nfs4_setup_sequence(NFS_SERVER(data->dir),
2929 &data->args.seq_args,
2930 &data->res.seq_res,
2931 task);
1da177e4
LT		 2932}
2933
e4eff1a6 2934static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 2935{
e4eff1a6
TM		 2936 struct nfs_removeres *res = task->tk_msg.rpc_resp;
2937
14516c3a
TM		 2938 if (!nfs4_sequence_done(task, &res->seq_res))
2939 return 0;
9e33bed5 2940 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 2941 return 0;
2942 update_changeattr(dir, &res->cinfo);
e4eff1a6 2943 return 1;
1da177e4
LT		 2944}
2945
d3d4152a
JL		 2946static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
2947{
2948 struct nfs_server *server = NFS_SERVER(dir);
2949 struct nfs_renameargs *arg = msg->rpc_argp;
2950 struct nfs_renameres *res = msg->rpc_resp;
2951
2952 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 2953 res->server = server;
9d12b216 2954 nfs41_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 2955}
2956
c6bfa1a1
BS		 2957static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
2958{
d9afbd1b
TM		 2959 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
2960 &data->args.seq_args,
2961 &data->res.seq_res,
2962 task);
d3d4152a
JL		 2963}
2964
2965static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
2966 struct inode *new_dir)
2967{
2968 struct nfs_renameres *res = task->tk_msg.rpc_resp;
2969
2970 if (!nfs4_sequence_done(task, &res->seq_res))
2971 return 0;
2972 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
2973 return 0;
2974
2975 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 2976 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 2977 return 1;
2978}
2979
1da177e4
LT		 2980static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
2981 struct inode *new_dir, struct qstr *new_name)
2982{
6caf2c82 2983 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 2984 struct nfs_renameargs arg = {
1da177e4
LT		 2985 .old_dir = NFS_FH(old_dir),
2986 .new_dir = NFS_FH(new_dir),
2987 .old_name = old_name,
2988 .new_name = new_name,
6caf2c82 2989 };
e8582a8b 2990 struct nfs_renameres res = {
6caf2c82 2991 .server = server,
1da177e4 2992 };
1da177e4
LT		 2993 struct rpc_message msg = {
2994 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
2995 .rpc_argp = &arg,
2996 .rpc_resp = &res,
2997 };
011fff72 2998 int status = -ENOMEM;
1da177e4 2999
7c513058 3000 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3001 if (!status) {
3002 update_changeattr(old_dir, &res.old_cinfo);
3003 update_changeattr(new_dir, &res.new_cinfo);
3004 }
3005 return status;
3006}
3007
3008static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3009 struct inode *new_dir, struct qstr *new_name)
3010{
3011 struct nfs4_exception exception = { };
3012 int err;
3013 do {
3014 err = nfs4_handle_exception(NFS_SERVER(old_dir),
3015 _nfs4_proc_rename(old_dir, old_name,
3016 new_dir, new_name),
3017 &exception);
3018 } while (exception.retry);
3019 return err;
3020}
3021
3022static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3023{
91ba2eee 3024 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3025 struct nfs4_link_arg arg = {
3026 .fh = NFS_FH(inode),
3027 .dir_fh = NFS_FH(dir),
3028 .name = name,
91ba2eee
TM		 3029 .bitmask = server->attr_bitmask,
3030 };
91ba2eee
TM		 3031 struct nfs4_link_res res = {
3032 .server = server,
1da177e4 3033 };
1da177e4
LT		 3034 struct rpc_message msg = {
3035 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3036 .rpc_argp = &arg,
91ba2eee 3037 .rpc_resp = &res,
1da177e4 3038 };
136f2627
TM		 3039 int status = -ENOMEM;
3040
3041 res.fattr = nfs_alloc_fattr();
778d2817 3042 if (res.fattr == NULL)
136f2627 3043 goto out;
1da177e4 3044
7c513058 3045 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3046 if (!status) {
3047 update_changeattr(dir, &res.cinfo);
73a3d07c 3048 nfs_post_op_update_inode(inode, res.fattr);
91ba2eee 3049 }
136f2627 3050out:
136f2627 3051 nfs_free_fattr(res.fattr);
1da177e4
LT		 3052 return status;
3053}
3054
3055static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3056{
3057 struct nfs4_exception exception = { };
3058 int err;
3059 do {
3060 err = nfs4_handle_exception(NFS_SERVER(inode),
3061 _nfs4_proc_link(inode, dir, name),
3062 &exception);
3063 } while (exception.retry);
3064 return err;
3065}
3066
57dc9a57
TM		 3067struct nfs4_createdata {
3068 struct rpc_message msg;
3069 struct nfs4_create_arg arg;
3070 struct nfs4_create_res res;
3071 struct nfs_fh fh;
3072 struct nfs_fattr fattr;
57dc9a57
TM		 3073};
3074
3075static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3076 struct qstr *name, struct iattr *sattr, u32 ftype)
3077{
3078 struct nfs4_createdata *data;
3079
3080 data = kzalloc(sizeof(*data), GFP_KERNEL);
3081 if (data != NULL) {
3082 struct nfs_server *server = NFS_SERVER(dir);
3083
3084 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3085 data->msg.rpc_argp = &data->arg;
3086 data->msg.rpc_resp = &data->res;
3087 data->arg.dir_fh = NFS_FH(dir);
3088 data->arg.server = server;
3089 data->arg.name = name;
3090 data->arg.attrs = sattr;
3091 data->arg.ftype = ftype;
3092 data->arg.bitmask = server->attr_bitmask;
3093 data->res.server = server;
3094 data->res.fh = &data->fh;
3095 data->res.fattr = &data->fattr;
57dc9a57 3096 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3097 }
3098 return data;
3099}
3100
3101static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3102{
7c513058 3103 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3104 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3105 if (status == 0) {
3106 update_changeattr(dir, &data->res.dir_cinfo);
57dc9a57
TM		 3107 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr);
3108 }
3109 return status;
3110}
3111
3112static void nfs4_free_createdata(struct nfs4_createdata *data)
3113{
3114 kfree(data);
3115}
3116
4f390c15 3117static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3118 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4 3119{
57dc9a57
TM		 3120 struct nfs4_createdata *data;
3121 int status = -ENAMETOOLONG;
1da177e4 3122
94a6d753 3123 if (len > NFS4_MAXPATHLEN)
57dc9a57 3124 goto out;
4f390c15 3125
57dc9a57
TM		 3126 status = -ENOMEM;
3127 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3128 if (data == NULL)
3129 goto out;
3130
3131 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3132 data->arg.u.symlink.pages = &page;
3133 data->arg.u.symlink.len = len;
1da177e4 3134
57dc9a57
TM		 3135 status = nfs4_do_create(dir, dentry, data);
3136
3137 nfs4_free_createdata(data);
3138out:
1da177e4
LT		 3139 return status;
3140}
3141
4f390c15 3142static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3143 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3144{
3145 struct nfs4_exception exception = { };
3146 int err;
3147 do {
3148 err = nfs4_handle_exception(NFS_SERVER(dir),
94a6d753
CL		 3149 _nfs4_proc_symlink(dir, dentry, page,
3150 len, sattr),
1da177e4
LT		 3151 &exception);
3152 } while (exception.retry);
3153 return err;
3154}
3155
3156static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3157 struct iattr *sattr)
3158{
57dc9a57
TM		 3159 struct nfs4_createdata *data;
3160 int status = -ENOMEM;
1da177e4 3161
57dc9a57
TM		 3162 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3163 if (data == NULL)
3164 goto out;
3165
3166 status = nfs4_do_create(dir, dentry, data);
3167
3168 nfs4_free_createdata(data);
3169out:
1da177e4
LT		 3170 return status;
3171}
3172
3173static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3174 struct iattr *sattr)
3175{
3176 struct nfs4_exception exception = { };
3177 int err;
a8a5da99
AK		 3178
3179 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3180 do {
3181 err = nfs4_handle_exception(NFS_SERVER(dir),
3182 _nfs4_proc_mkdir(dir, dentry, sattr),
3183 &exception);
3184 } while (exception.retry);
3185 return err;
3186}
3187
3188static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3189 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3190{
3191 struct inode *dir = dentry->d_inode;
3192 struct nfs4_readdir_arg args = {
3193 .fh = NFS_FH(dir),
56e4ebf8 3194 .pages = pages,
1da177e4
LT		 3195 .pgbase = 0,
3196 .count = count,
96d25e53 3197 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3198 .plus = plus,
1da177e4
LT		 3199 };
3200 struct nfs4_readdir_res res;
3201 struct rpc_message msg = {
3202 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3203 .rpc_argp = &args,
3204 .rpc_resp = &res,
3205 .rpc_cred = cred,
3206 };
3207 int status;
3208
3110ff80 3209 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3210 dentry->d_parent->d_name.name,
3211 dentry->d_name.name,
3212 (unsigned long long)cookie);
c3f52af3 3213 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3214 res.pgbase = args.pgbase;
7c513058 3215 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3216 if (status >= 0) {
c3f52af3 3217 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3218 status += args.pgbase;
3219 }
c4812998
TM		 3220
3221 nfs_invalidate_atime(dir);
3222
3110ff80 3223 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3224 return status;
3225}
3226
3227static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3228 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3229{
3230 struct nfs4_exception exception = { };
3231 int err;
3232 do {
3233 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode),
3234 _nfs4_proc_readdir(dentry, cred, cookie,
56e4ebf8 3235 pages, count, plus),
1da177e4
LT		 3236 &exception);
3237 } while (exception.retry);
3238 return err;
3239}
3240
3241static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3242 struct iattr *sattr, dev_t rdev)
3243{
57dc9a57
TM		 3244 struct nfs4_createdata *data;
3245 int mode = sattr->ia_mode;
3246 int status = -ENOMEM;
1da177e4 3247
57dc9a57
TM		 3248 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3249 if (data == NULL)
3250 goto out;
3251
1da177e4 3252 if (S_ISFIFO(mode))
57dc9a57 3253 data->arg.ftype = NF4FIFO;
1da177e4 3254 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3255 data->arg.ftype = NF4BLK;
3256 data->arg.u.device.specdata1 = MAJOR(rdev);
3257 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3258 }
3259 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3260 data->arg.ftype = NF4CHR;
3261 data->arg.u.device.specdata1 = MAJOR(rdev);
3262 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3263 } else if (!S_ISSOCK(mode)) {
3264 status = -EINVAL;
3265 goto out_free;
1da177e4 3266 }
1da177e4 3267
57dc9a57 3268 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3269out_free:
57dc9a57
TM		 3270 nfs4_free_createdata(data);
3271out:
1da177e4
LT		 3272 return status;
3273}
3274
3275static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3276 struct iattr *sattr, dev_t rdev)
3277{
3278 struct nfs4_exception exception = { };
3279 int err;
a8a5da99
AK		 3280
3281 sattr->ia_mode &= ~current_umask();
1da177e4
LT		 3282 do {
3283 err = nfs4_handle_exception(NFS_SERVER(dir),
3284 _nfs4_proc_mknod(dir, dentry, sattr, rdev),
3285 &exception);
3286 } while (exception.retry);
3287 return err;
3288}
3289
3290static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3291 struct nfs_fsstat *fsstat)
3292{
3293 struct nfs4_statfs_arg args = {
3294 .fh = fhandle,
3295 .bitmask = server->attr_bitmask,
3296 };
24ad148a
BH		 3297 struct nfs4_statfs_res res = {
3298 .fsstat = fsstat,
3299 };
1da177e4
LT		 3300 struct rpc_message msg = {
3301 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3302 .rpc_argp = &args,
24ad148a 3303 .rpc_resp = &res,
1da177e4
LT		 3304 };
3305
0e574af1 3306 nfs_fattr_init(fsstat->fattr);
7c513058 3307 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3308}
3309
3310static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3311{
3312 struct nfs4_exception exception = { };
3313 int err;
3314 do {
3315 err = nfs4_handle_exception(server,
3316 _nfs4_proc_statfs(server, fhandle, fsstat),
3317 &exception);
3318 } while (exception.retry);
3319 return err;
3320}
3321
3322static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3323 struct nfs_fsinfo *fsinfo)
3324{
3325 struct nfs4_fsinfo_arg args = {
3326 .fh = fhandle,
3327 .bitmask = server->attr_bitmask,
3328 };
3dda5e43
BH		 3329 struct nfs4_fsinfo_res res = {
3330 .fsinfo = fsinfo,
3331 };
1da177e4
LT		 3332 struct rpc_message msg = {
3333 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3334 .rpc_argp = &args,
3dda5e43 3335 .rpc_resp = &res,
1da177e4
LT		 3336 };
3337
7c513058 3338 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3339}
3340
3341static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3342{
3343 struct nfs4_exception exception = { };
3344 int err;
3345
3346 do {
3347 err = nfs4_handle_exception(server,
3348 _nfs4_do_fsinfo(server, fhandle, fsinfo),
3349 &exception);
3350 } while (exception.retry);
3351 return err;
3352}
3353
3354static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3355{
e38eb650
BS		 3356 int error;
3357
0e574af1 3358 nfs_fattr_init(fsinfo->fattr);
e38eb650 3359 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3360 if (error == 0) {
3361 /* block layout checks this! */
3362 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3363 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3364 }
e38eb650
BS		 3365
3366 return error;
1da177e4
LT		 3367}
3368
3369static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3370 struct nfs_pathconf *pathconf)
3371{
3372 struct nfs4_pathconf_arg args = {
3373 .fh = fhandle,
3374 .bitmask = server->attr_bitmask,
3375 };
d45b2989
BH		 3376 struct nfs4_pathconf_res res = {
3377 .pathconf = pathconf,
3378 };
1da177e4
LT		 3379 struct rpc_message msg = {
3380 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3381 .rpc_argp = &args,
d45b2989 3382 .rpc_resp = &res,
1da177e4
LT		 3383 };
3384
3385 /* None of the pathconf attributes are mandatory to implement */
3386 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3387 memset(pathconf, 0, sizeof(*pathconf));
3388 return 0;
3389 }
3390
0e574af1 3391 nfs_fattr_init(pathconf->fattr);
7c513058 3392 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3393}
3394
3395static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3396 struct nfs_pathconf *pathconf)
3397{
3398 struct nfs4_exception exception = { };
3399 int err;
3400
3401 do {
3402 err = nfs4_handle_exception(server,
3403 _nfs4_proc_pathconf(server, fhandle, pathconf),
3404 &exception);
3405 } while (exception.retry);
3406 return err;
3407}
3408
d20581aa
BH		 3409void __nfs4_read_done_cb(struct nfs_read_data *data)
3410{
cd841605 3411 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3412}
3413
cbdabc7f 3414static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3415{
cd841605 3416 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3417
9e33bed5 3418 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3419 rpc_restart_call_prepare(task);
ec06c096 3420 return -EAGAIN;
1da177e4 3421 }
8850df99 3422
d20581aa 3423 __nfs4_read_done_cb(data);
1da177e4 3424 if (task->tk_status > 0)
ec06c096
TM		 3425 renew_lease(server, data->timestamp);
3426 return 0;
1da177e4
LT		 3427}
3428
cbdabc7f
AA		 3429static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
3430{
3431
3432 dprintk("--> %s\n", __func__);
3433
3434 if (!nfs4_sequence_done(task, &data->res.seq_res))
3435 return -EAGAIN;
3436
d20581aa
BH		 3437 return data->read_done_cb ? data->read_done_cb(task, data) :
3438 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 3439}
3440
bdc7f021 3441static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 3442{
1da177e4 3443 data->timestamp = jiffies;
cbdabc7f 3444 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 3445 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
9d12b216 3446 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 3447}
3448
ea7c3303
BS		 3449static void nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
3450{
d9afbd1b
TM		 3451 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3452 &data->args.seq_args,
3453 &data->res.seq_res,
3454 task);
1da177e4
LT		 3455}
3456
b029bc9b 3457static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 3458{
cd841605 3459 struct inode *inode = data->header->inode;
1da177e4 3460
9e33bed5 3461 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 3462 rpc_restart_call_prepare(task);
788e7a89 3463 return -EAGAIN;
1da177e4 3464 }
4f9838c7 3465 if (task->tk_status >= 0) {
1da177e4 3466 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 3467 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 3468 }
788e7a89 3469 return 0;
1da177e4
LT		 3470}
3471
b029bc9b
FI		 3472static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
3473{
3474 if (!nfs4_sequence_done(task, &data->res.seq_res))
3475 return -EAGAIN;
d20581aa
BH		 3476 return data->write_done_cb ? data->write_done_cb(task, data) :
3477 nfs4_write_done_cb(task, data);
b029bc9b
FI		 3478}
3479
5a37f851
TM		 3480static
3481bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 3482{
5a37f851
TM		 3483 const struct nfs_pgio_header *hdr = data->header;
3484
3485 /* Don't request attributes for pNFS or O_DIRECT writes */
3486 if (data->ds_clp != NULL || hdr->dreq != NULL)
3487 return false;
3488 /* Otherwise, request attributes if and only if we don't hold
3489 * a delegation
3490 */
011e2a7f 3491 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 3492}
a69aef14 3493
bdc7f021 3494static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 3495{
cd841605 3496 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 3497
5a37f851 3498 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 3499 data->args.bitmask = NULL;
3500 data->res.fattr = NULL;
3501 } else
3502 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 3503
b029bc9b
FI		 3504 if (!data->write_done_cb)
3505 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 3506 data->res.server = server;
1da177e4
LT		 3507 data->timestamp = jiffies;
3508
bdc7f021 3509 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
9d12b216 3510 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3511}
3512
c6cb80d0
BS		 3513static void nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
3514{
d9afbd1b
TM		 3515 nfs4_setup_sequence(NFS_SERVER(data->header->inode),
3516 &data->args.seq_args,
3517 &data->res.seq_res,
3518 task);
1da177e4
LT		 3519}
3520
0b7c0153 3521static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 3522{
d9afbd1b
TM		 3523 nfs4_setup_sequence(NFS_SERVER(data->inode),
3524 &data->args.seq_args,
3525 &data->res.seq_res,
3526 task);
1da177e4
LT		 3527}
3528
0b7c0153 3529static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 3530{
1da177e4 3531 struct inode *inode = data->inode;
14516c3a 3532
9e33bed5 3533 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 3534 rpc_restart_call_prepare(task);
788e7a89 3535 return -EAGAIN;
1da177e4 3536 }
788e7a89 3537 return 0;
1da177e4
LT		 3538}
3539
0b7c0153 3540static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 3541{
3542 if (!nfs4_sequence_done(task, &data->res.seq_res))
3543 return -EAGAIN;
0b7c0153 3544 return data->commit_done_cb(task, data);
5f452431
FI		 3545}
3546
0b7c0153 3547static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 3548{
788e7a89 3549 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 3550
0b7c0153
FI		 3551 if (data->commit_done_cb == NULL)
3552 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 3553 data->res.server = server;
bdc7f021 3554 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
9d12b216 3555 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 3556}
3557
9bc4e3ca
CL		 3558struct nfs4_renewdata {
3559 struct nfs_client *client;
3560 unsigned long timestamp;
3561};
3562
1da177e4
LT		 3563/*
3564 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
3565 * standalone procedure for queueing an asynchronous RENEW.
3566 */
9bc4e3ca 3567static void nfs4_renew_release(void *calldata)
dc96aef9 3568{
9bc4e3ca
CL		 3569 struct nfs4_renewdata *data = calldata;
3570 struct nfs_client *clp = data->client;
dc96aef9 3571
0851de06
AB		 3572 if (atomic_read(&clp->cl_count) > 1)
3573 nfs4_schedule_state_renewal(clp);
3574 nfs_put_client(clp);
9bc4e3ca 3575 kfree(data);
dc96aef9
AB		 3576}
3577
9bc4e3ca 3578static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 3579{
9bc4e3ca
CL		 3580 struct nfs4_renewdata *data = calldata;
3581 struct nfs_client *clp = data->client;
3582 unsigned long timestamp = data->timestamp;
1da177e4
LT		 3583
3584 if (task->tk_status < 0) {
95baa25c 3585 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 3586 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
3587 return;
3588 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 3589 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 3590 return;
3591 }
3592 nfs4_schedule_path_down_recovery(clp);
1da177e4 3593 }
452e9352 3594 do_renew_lease(clp, timestamp);
1da177e4
LT		 3595}
3596
963d8fe5
TM		 3597static const struct rpc_call_ops nfs4_renew_ops = {
3598 .rpc_call_done = nfs4_renew_done,
dc96aef9 3599 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 3600};
3601
2f60ea6b 3602static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 3603{
3604 struct rpc_message msg = {
3605 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3606 .rpc_argp = clp,
b4454fe1 3607 .rpc_cred = cred,
1da177e4 3608 };
9bc4e3ca 3609 struct nfs4_renewdata *data;
1da177e4 3610
2f60ea6b
TM		 3611 if (renew_flags == 0)
3612 return 0;
0851de06
AB		 3613 if (!atomic_inc_not_zero(&clp->cl_count))
3614 return -EIO;
b569ad34 3615 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 3616 if (data == NULL)
3617 return -ENOMEM;
3618 data->client = clp;
3619 data->timestamp = jiffies;
1da177e4 3620 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_SOFT,
9bc4e3ca 3621 &nfs4_renew_ops, data);
1da177e4
LT		 3622}
3623
8534d4ec 3624static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 3625{
3626 struct rpc_message msg = {
3627 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
3628 .rpc_argp = clp,
b4454fe1 3629 .rpc_cred = cred,
1da177e4
LT		 3630 };
3631 unsigned long now = jiffies;
3632 int status;
3633
3634 status = rpc_call_sync(clp->cl_rpcclient, &msg, 0);
3635 if (status < 0)
3636 return status;
452e9352 3637 do_renew_lease(clp, now);
1da177e4
LT		 3638 return 0;
3639}
3640
aa1870af
BF		 3641static inline int nfs4_server_supports_acls(struct nfs_server *server)
3642{
3643 return (server->caps & NFS_CAP_ACLS)
3644 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
3645 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
3646}
3647
21f498c2
TM		 3648/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
3649 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 3650 * the stack.
3651 */
21f498c2 3652#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 3653
e9e3d724
NH		 3654static int buf_to_pages_noslab(const void *buf, size_t buflen,
3655 struct page **pages, unsigned int *pgbase)
3656{
3657 struct page *newpage, **spages;
3658 int rc = 0;
3659 size_t len;
3660 spages = pages;
3661
3662 do {
21f498c2 3663 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 3664 newpage = alloc_page(GFP_KERNEL);
3665
3666 if (newpage == NULL)
3667 goto unwind;
3668 memcpy(page_address(newpage), buf, len);
3669 buf += len;
3670 buflen -= len;
3671 *pages++ = newpage;
3672 rc++;
3673 } while (buflen != 0);
3674
3675 return rc;
3676
3677unwind:
3678 for(; rc > 0; rc--)
3679 __free_page(spages[rc-1]);
3680 return -ENOMEM;
3681}
3682
e50a1c2e
BF		 3683struct nfs4_cached_acl {
3684 int cached;
3685 size_t len;
3e9d4154 3686 char data[0];
e50a1c2e
BF		 3687};
3688
3689static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
3690{
3691 struct nfs_inode *nfsi = NFS_I(inode);
3692
3693 spin_lock(&inode->i_lock);
3694 kfree(nfsi->nfs4_acl);
3695 nfsi->nfs4_acl = acl;
3696 spin_unlock(&inode->i_lock);
3697}
3698
3699static void nfs4_zap_acl_attr(struct inode *inode)
3700{
3701 nfs4_set_cached_acl(inode, NULL);
3702}
3703
3704static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
3705{
3706 struct nfs_inode *nfsi = NFS_I(inode);
3707 struct nfs4_cached_acl *acl;
3708 int ret = -ENOENT;
3709
3710 spin_lock(&inode->i_lock);
3711 acl = nfsi->nfs4_acl;
3712 if (acl == NULL)
3713 goto out;
3714 if (buf == NULL) /* user is just asking for length */
3715 goto out_len;
3716 if (acl->cached == 0)
3717 goto out;
3718 ret = -ERANGE; /* see getxattr(2) man page */
3719 if (acl->len > buflen)
3720 goto out;
3721 memcpy(buf, acl->data, acl->len);
3722out_len:
3723 ret = acl->len;
3724out:
3725 spin_unlock(&inode->i_lock);
3726 return ret;
3727}
3728
5794d21e 3729static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 3730{
3731 struct nfs4_cached_acl *acl;
b291f1b1 3732 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 3733
1f1ea6c2 3734 if (buflen <= PAGE_SIZE) {
b291f1b1 3735 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 3736 if (acl == NULL)
3737 goto out;
3738 acl->cached = 1;
5794d21e 3739 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 3740 } else {
3741 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
3742 if (acl == NULL)
3743 goto out;
3744 acl->cached = 0;
3745 }
3746 acl->len = acl_len;
3747out:
3748 nfs4_set_cached_acl(inode, acl);
3749}
3750
bf118a34
AA		 3751/*
3752 * The getxattr API returns the required buffer length when called with a
3753 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
3754 * the required buf. On a NULL buf, we send a page of data to the server
3755 * guessing that the ACL request can be serviced by a page. If so, we cache
3756 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
3757 * the cache. If not so, we throw away the page, and cache the required
3758 * length. The next getxattr call will then produce another round trip to
3759 * the server, this time with the input buf of the required size.
3760 */
16b4289c 3761static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 3762{
bf118a34 3763 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 3764 struct nfs_getaclargs args = {
3765 .fh = NFS_FH(inode),
3766 .acl_pages = pages,
3767 .acl_len = buflen,
3768 };
663c79b3
BH		 3769 struct nfs_getaclres res = {
3770 .acl_len = buflen,
3771 };
aa1870af
BF		 3772 struct rpc_message msg = {
3773 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
3774 .rpc_argp = &args,
663c79b3 3775 .rpc_resp = &res,
aa1870af 3776 };
21f498c2
TM		 3777 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
3778 int ret = -ENOMEM, i;
aa1870af 3779
bf118a34
AA		 3780 /* As long as we're doing a round trip to the server anyway,
3781 * let's be prepared for a page of acl data. */
3782 if (npages == 0)
3783 npages = 1;
21f498c2
TM		 3784 if (npages > ARRAY_SIZE(pages))
3785 return -ERANGE;
5a006899 3786
bf118a34
AA		 3787 for (i = 0; i < npages; i++) {
3788 pages[i] = alloc_page(GFP_KERNEL);
3789 if (!pages[i])
3790 goto out_free;
e50a1c2e 3791 }
5a006899
SP		 3792
3793 /* for decoding across pages */
3794 res.acl_scratch = alloc_page(GFP_KERNEL);
3795 if (!res.acl_scratch)
3796 goto out_free;
3797
bf118a34
AA		 3798 args.acl_len = npages * PAGE_SIZE;
3799 args.acl_pgbase = 0;
5a006899 3800
de040bec 3801 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 3802 __func__, buf, buflen, npages, args.acl_len);
3803 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
3804 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 3805 if (ret)
3806 goto out_free;
bf118a34 3807
1f1ea6c2
TM		 3808 /* Handle the case where the passed-in buffer is too short */
3809 if (res.acl_flags & NFS4_ACL_TRUNC) {
3810 /* Did the user only issue a request for the acl length? */
3811 if (buf == NULL)
3812 goto out_ok;
e50a1c2e 3813 ret = -ERANGE;
1f1ea6c2 3814 goto out_free;
e50a1c2e 3815 }
1f1ea6c2 3816 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 3817 if (buf) {
3818 if (res.acl_len > buflen) {
3819 ret = -ERANGE;
3820 goto out_free;
3821 }
1f1ea6c2 3822 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 3823 }
1f1ea6c2
TM		 3824out_ok:
3825 ret = res.acl_len;
e50a1c2e 3826out_free:
bf118a34
AA		 3827 for (i = 0; i < npages; i++)
3828 if (pages[i])
3829 __free_page(pages[i]);
331818f1
TM		 3830 if (res.acl_scratch)
3831 __free_page(res.acl_scratch);
aa1870af
BF		 3832 return ret;
3833}
3834
16b4289c
TM		 3835static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
3836{
3837 struct nfs4_exception exception = { };
3838 ssize_t ret;
3839 do {
3840 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
3841 if (ret >= 0)
3842 break;
3843 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
3844 } while (exception.retry);
3845 return ret;
3846}
3847
e50a1c2e
BF		 3848static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
3849{
3850 struct nfs_server *server = NFS_SERVER(inode);
3851 int ret;
3852
3853 if (!nfs4_server_supports_acls(server))
3854 return -EOPNOTSUPP;
3855 ret = nfs_revalidate_inode(server, inode);
3856 if (ret < 0)
3857 return ret;
08a22b39
AK		 3858 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
3859 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 3860 ret = nfs4_read_cached_acl(inode, buf, buflen);
3861 if (ret != -ENOENT)
bf118a34
AA		 3862 /* -ENOENT is returned if there is no ACL or if there is an ACL
3863 * but no cached acl data, just the acl length */
e50a1c2e
BF		 3864 return ret;
3865 return nfs4_get_acl_uncached(inode, buf, buflen);
3866}
3867
16b4289c 3868static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 3869{
3870 struct nfs_server *server = NFS_SERVER(inode);
3871 struct page *pages[NFS4ACL_MAXPAGES];
3872 struct nfs_setaclargs arg = {
3873 .fh = NFS_FH(inode),
3874 .acl_pages = pages,
3875 .acl_len = buflen,
3876 };
73c403a9 3877 struct nfs_setaclres res;
4b580ee3
BF		 3878 struct rpc_message msg = {
3879 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
3880 .rpc_argp = &arg,
73c403a9 3881 .rpc_resp = &res,
4b580ee3 3882 };
21f498c2 3883 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 3884 int ret, i;
4b580ee3
BF		 3885
3886 if (!nfs4_server_supports_acls(server))
3887 return -EOPNOTSUPP;
21f498c2
TM		 3888 if (npages > ARRAY_SIZE(pages))
3889 return -ERANGE;
e9e3d724
NH		 3890 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
3891 if (i < 0)
3892 return i;
57ec14c5 3893 nfs4_inode_return_delegation(inode);
7c513058 3894 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 3895
3896 /*
3897 * Free each page after tx, so the only ref left is
3898 * held by the network stack
3899 */
3900 for (; i > 0; i--)
3901 put_page(pages[i-1]);
3902
08a22b39
AK		 3903 /*
3904 * Acl update can result in inode attribute update.
3905 * so mark the attribute cache invalid.
3906 */
3907 spin_lock(&inode->i_lock);
3908 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
3909 spin_unlock(&inode->i_lock);
f41f7418
TM		 3910 nfs_access_zap_cache(inode);
3911 nfs_zap_acl_cache(inode);
4b580ee3
BF		 3912 return ret;
3913}
3914
16b4289c
TM		 3915static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
3916{
3917 struct nfs4_exception exception = { };
3918 int err;
3919 do {
3920 err = nfs4_handle_exception(NFS_SERVER(inode),
3921 __nfs4_proc_set_acl(inode, buf, buflen),
3922 &exception);
3923 } while (exception.retry);
3924 return err;
3925}
3926
1da177e4 3927static int
aa5190d0 3928nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 3929{
aa5190d0
TM		 3930 struct nfs_client *clp = server->nfs_client;
3931
3932 if (task->tk_status >= 0)
1da177e4
LT		 3933 return 0;
3934 switch(task->tk_status) {
a1d0b5ee 3935 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 3936 case -NFS4ERR_ADMIN_REVOKED:
3937 case -NFS4ERR_BAD_STATEID:
14977489
TM		 3938 if (state == NULL)
3939 break;
3940 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 3941 case -NFS4ERR_OPENMODE:
3942 if (state == NULL)
3943 break;
0400a6b0
TM		 3944 nfs4_schedule_stateid_recovery(server, state);
3945 goto wait_on_recovery;
0ced63d1
TM		 3946 case -NFS4ERR_EXPIRED:
3947 if (state != NULL)
3948 nfs4_schedule_stateid_recovery(server, state);
1da177e4 3949 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 3950 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 3951 nfs4_schedule_lease_recovery(clp);
3952 goto wait_on_recovery;
4745e315
AA		 3953#if defined(CONFIG_NFS_V4_1)
3954 case -NFS4ERR_BADSESSION:
3955 case -NFS4ERR_BADSLOT:
3956 case -NFS4ERR_BAD_HIGH_SLOT:
3957 case -NFS4ERR_DEADSESSION:
3958 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
3959 case -NFS4ERR_SEQ_FALSE_RETRY:
3960 case -NFS4ERR_SEQ_MISORDERED:
3961 dprintk("%s ERROR %d, Reset session\n", __func__,
3962 task->tk_status);
9f594791 3963 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 3964 task->tk_status = 0;
3965 return -EAGAIN;
3966#endif /* CONFIG_NFS_V4_1 */
1da177e4 3967 case -NFS4ERR_DELAY:
aa5190d0 3968 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 3969 case -NFS4ERR_GRACE:
1da177e4
LT		 3970 rpc_delay(task, NFS4_POLL_RETRY_MAX);
3971 task->tk_status = 0;
3972 return -EAGAIN;
a8a4ae3a 3973 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 3974 case -NFS4ERR_OLD_STATEID:
3975 task->tk_status = 0;
3976 return -EAGAIN;
3977 }
3978 task->tk_status = nfs4_map_errors(task->tk_status);
3979 return 0;
0400a6b0 3980wait_on_recovery:
a2c0b9e2 3981 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 3982 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
3983 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
3984 task->tk_status = 0;
3985 return -EAGAIN;
1da177e4
LT		 3986}
3987
f092075d
CL		 3988static void nfs4_init_boot_verifier(const struct nfs_client *clp,
3989 nfs4_verifier *bootverf)
cd93710e
CL		 3990{
3991 __be32 verf[2];
3992
2c820d9a
CL		 3993 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
3994 /* An impossible timestamp guarantees this value
3995 * will never match a generated boot time. */
3996 verf[0] = 0;
3997 verf[1] = (__be32)(NSEC_PER_SEC + 1);
3998 } else {
f092075d
CL		 3999 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
4000 verf[0] = (__be32)nn->boot_time.tv_sec;
4001 verf[1] = (__be32)nn->boot_time.tv_nsec;
2c820d9a 4002 }
cd93710e
CL		 4003 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4004}
4005
e984a55a
CL		 4006static unsigned int
4007nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4008 char *buf, size_t len)
4009{
4010 unsigned int result;
4011
4012 rcu_read_lock();
4013 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4014 clp->cl_ipaddr,
4015 rpc_peeraddr2str(clp->cl_rpcclient,
4016 RPC_DISPLAY_ADDR),
4017 rpc_peeraddr2str(clp->cl_rpcclient,
4018 RPC_DISPLAY_PROTO));
4019 rcu_read_unlock();
4020 return result;
4021}
4022
4023static unsigned int
4024nfs4_init_uniform_client_string(const struct nfs_client *clp,
4025 char *buf, size_t len)
4026{
6f2ea7f2
CL		 4027 char *nodename = clp->cl_rpcclient->cl_nodename;
4028
4029 if (nfs4_client_id_uniquifier[0] != '\0')
4030 nodename = nfs4_client_id_uniquifier;
e984a55a
CL		 4031 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4032 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4033 nodename);
e984a55a
CL		 4034}
4035
6bbb4ae8
CL		 4036/**
4037 * nfs4_proc_setclientid - Negotiate client ID
4038 * @clp: state data structure
4039 * @program: RPC program for NFSv4 callback service
4040 * @port: IP port number for NFS4 callback service
4041 * @cred: RPC credential to use for this call
4042 * @res: where to place the result
4043 *
4044 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4045 */
bb8b27e5
TM		 4046int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4047 unsigned short port, struct rpc_cred *cred,
4048 struct nfs4_setclientid_res *res)
1da177e4
LT		 4049{
4050 nfs4_verifier sc_verifier;
4051 struct nfs4_setclientid setclientid = {
4052 .sc_verifier = &sc_verifier,
4053 .sc_prog = program,
f4eecd5d 4054 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4055 };
4056 struct rpc_message msg = {
4057 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4058 .rpc_argp = &setclientid,
bb8b27e5 4059 .rpc_resp = res,
286d7d6a 4060 .rpc_cred = cred,
1da177e4 4061 };
6bbb4ae8 4062 int status;
1da177e4 4063
de734831 4064 /* nfs_client_id4 */
f092075d 4065 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4066 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4067 setclientid.sc_name_len =
4068 nfs4_init_uniform_client_string(clp,
4069 setclientid.sc_name,
4070 sizeof(setclientid.sc_name));
4071 else
4072 setclientid.sc_name_len =
4073 nfs4_init_nonuniform_client_string(clp,
4074 setclientid.sc_name,
4075 sizeof(setclientid.sc_name));
de734831 4076 /* cb_client4 */
e984a55a 4077 rcu_read_lock();
de734831 4078 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
d4d3c507
CL		 4079 sizeof(setclientid.sc_netid),
4080 rpc_peeraddr2str(clp->cl_rpcclient,
4081 RPC_DISPLAY_NETID));
de734831
CL		 4082 rcu_read_unlock();
4083 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4084 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4085 clp->cl_ipaddr, port >> 8, port & 255);
4086
6bbb4ae8
CL		 4087 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4088 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4089 setclientid.sc_name_len, setclientid.sc_name);
4090 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
4091 dprintk("NFS reply setclientid: %d\n", status);
4092 return status;
1da177e4
LT		 4093}
4094
6bbb4ae8
CL		 4095/**
4096 * nfs4_proc_setclientid_confirm - Confirm client ID
4097 * @clp: state data structure
4098 * @res: result of a previous SETCLIENTID
4099 * @cred: RPC credential to use for this call
4100 *
4101 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4102 */
fd954ae1 4103int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4104 struct nfs4_setclientid_res *arg,
4105 struct rpc_cred *cred)
1da177e4
LT		 4106{
4107 struct nfs_fsinfo fsinfo;
4108 struct rpc_message msg = {
4109 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4110 .rpc_argp = arg,
1da177e4 4111 .rpc_resp = &fsinfo,
286d7d6a 4112 .rpc_cred = cred,
1da177e4
LT		 4113 };
4114 unsigned long now;
4115 int status;
4116
6bbb4ae8
CL		 4117 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4118 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4119 clp->cl_clientid);
1da177e4 4120 now = jiffies;
1bd714f2 4121 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4122 if (status == 0) {
4123 spin_lock(&clp->cl_lock);
4124 clp->cl_lease_time = fsinfo.lease_time * HZ;
4125 clp->cl_last_renewal = now;
4126 spin_unlock(&clp->cl_lock);
4127 }
6bbb4ae8 4128 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4129 return status;
4130}
4131
fe650407
TM		 4132struct nfs4_delegreturndata {
4133 struct nfs4_delegreturnargs args;
fa178f29 4134 struct nfs4_delegreturnres res;
fe650407
TM		 4135 struct nfs_fh fh;
4136 nfs4_stateid stateid;
26e976a8 4137 unsigned long timestamp;
fa178f29 4138 struct nfs_fattr fattr;
fe650407
TM		 4139 int rpc_status;
4140};
4141
fe650407
TM		 4142static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4143{
4144 struct nfs4_delegreturndata *data = calldata;
938e1010 4145
14516c3a
TM		 4146 if (!nfs4_sequence_done(task, &data->res.seq_res))
4147 return;
938e1010 4148
79708861
RL		 4149 switch (task->tk_status) {
4150 case -NFS4ERR_STALE_STATEID:
4151 case -NFS4ERR_EXPIRED:
4152 case 0:
fa178f29 4153 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4154 break;
4155 default:
4156 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4157 -EAGAIN) {
d00c5d43 4158 rpc_restart_call_prepare(task);
79708861
RL		 4159 return;
4160 }
4161 }
4162 data->rpc_status = task->tk_status;
fe650407
TM		 4163}
4164
4165static void nfs4_delegreturn_release(void *calldata)
4166{
fe650407
TM		 4167 kfree(calldata);
4168}
4169
938e1010
AA		 4170#if defined(CONFIG_NFS_V4_1)
4171static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4172{
4173 struct nfs4_delegreturndata *d_data;
4174
4175 d_data = (struct nfs4_delegreturndata *)data;
4176
d9afbd1b
TM		 4177 nfs4_setup_sequence(d_data->res.server,
4178 &d_data->args.seq_args,
4179 &d_data->res.seq_res,
4180 task);
938e1010
AA		 4181}
4182#endif /* CONFIG_NFS_V4_1 */
4183
c8d149f3 4184static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010
AA		 4185#if defined(CONFIG_NFS_V4_1)
4186 .rpc_call_prepare = nfs4_delegreturn_prepare,
4187#endif /* CONFIG_NFS_V4_1 */
fe650407
TM		 4188 .rpc_call_done = nfs4_delegreturn_done,
4189 .rpc_release = nfs4_delegreturn_release,
4190};
4191
e6f81075 4192static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4193{
4194 struct nfs4_delegreturndata *data;
fa178f29 4195 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4196 struct rpc_task *task;
5138fde0
TM		 4197 struct rpc_message msg = {
4198 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4199 .rpc_cred = cred,
4200 };
c970aa85
TM		 4201 struct rpc_task_setup task_setup_data = {
4202 .rpc_client = server->client,
5138fde0 4203 .rpc_message = &msg,
c970aa85
TM		 4204 .callback_ops = &nfs4_delegreturn_ops,
4205 .flags = RPC_TASK_ASYNC,
4206 };
e6f81075 4207 int status = 0;
fe650407 4208
8535b2be 4209 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4210 if (data == NULL)
4211 return -ENOMEM;
9d12b216 4212 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4213 data->args.fhandle = &data->fh;
4214 data->args.stateid = &data->stateid;
9e907fec 4215 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4216 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4217 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4218 data->res.fattr = &data->fattr;
4219 data->res.server = server;
5138fde0 4220 nfs_fattr_init(data->res.fattr);
26e976a8 4221 data->timestamp = jiffies;
fe650407
TM		 4222 data->rpc_status = 0;
4223
c970aa85 4224 task_setup_data.callback_data = data;
1174dd1f
TM		 4225 msg.rpc_argp = &data->args;
4226 msg.rpc_resp = &data->res;
c970aa85 4227 task = rpc_run_task(&task_setup_data);
7a1218a2 4228 if (IS_ERR(task))
fe650407 4229 return PTR_ERR(task);
e6f81075
TM		 4230 if (!issync)
4231 goto out;
fe650407 4232 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 4233 if (status != 0)
4234 goto out;
4235 status = data->rpc_status;
e144cbcc
TM		 4236 if (status == 0)
4237 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4238 else
4239 nfs_refresh_inode(inode, &data->fattr);
e6f81075 4240out:
e6b3c4db 4241 rpc_put_task(task);
fe650407 4242 return status;
1da177e4
LT		 4243}
4244
e6f81075 4245int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 4246{
4247 struct nfs_server *server = NFS_SERVER(inode);
4248 struct nfs4_exception exception = { };
4249 int err;
4250 do {
e6f81075 4251 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
1da177e4
LT		 4252 switch (err) {
4253 case -NFS4ERR_STALE_STATEID:
4254 case -NFS4ERR_EXPIRED:
1da177e4
LT		 4255 case 0:
4256 return 0;
4257 }
4258 err = nfs4_handle_exception(server, err, &exception);
4259 } while (exception.retry);
4260 return err;
4261}
4262
4263#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
4264#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
4265
4266/*
4267 * sleep, with exponential backoff, and retry the LOCK operation.
4268 */
4269static unsigned long
4270nfs4_set_lock_task_retry(unsigned long timeout)
4271{
d310310c 4272 freezable_schedule_timeout_killable(timeout);
1da177e4
LT		 4273 timeout <<= 1;
4274 if (timeout > NFS4_LOCK_MAXTIMEOUT)
4275 return NFS4_LOCK_MAXTIMEOUT;
4276 return timeout;
4277}
4278
1da177e4
LT		 4279static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4280{
4281 struct inode *inode = state->inode;
4282 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 4283 struct nfs_client *clp = server->nfs_client;
911d1aaf 4284 struct nfs_lockt_args arg = {
1da177e4 4285 .fh = NFS_FH(inode),
911d1aaf 4286 .fl = request,
1da177e4 4287 };
911d1aaf
TM		 4288 struct nfs_lockt_res res = {
4289 .denied = request,
1da177e4
LT		 4290 };
4291 struct rpc_message msg = {
4292 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
4293 .rpc_argp = &arg,
4294 .rpc_resp = &res,
4295 .rpc_cred = state->owner->so_cred,
4296 };
1da177e4
LT		 4297 struct nfs4_lock_state *lsp;
4298 int status;
4299
911d1aaf 4300 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 4301 status = nfs4_set_lock_state(state, request);
4302 if (status != 0)
4303 goto out;
4304 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 4305 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4306 arg.lock_owner.s_dev = server->s_dev;
7c513058 4307 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 4308 switch (status) {
4309 case 0:
4310 request->fl_type = F_UNLCK;
4311 break;
4312 case -NFS4ERR_DENIED:
4313 status = 0;
1da177e4 4314 }
70cc6487 4315 request->fl_ops->fl_release_private(request);
8d0a8a9d 4316out:
1da177e4
LT		 4317 return status;
4318}
4319
4320static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4321{
4322 struct nfs4_exception exception = { };
4323 int err;
4324
4325 do {
4326 err = nfs4_handle_exception(NFS_SERVER(state->inode),
4327 _nfs4_proc_getlk(state, cmd, request),
4328 &exception);
4329 } while (exception.retry);
4330 return err;
4331}
4332
4333static int do_vfs_lock(struct file *file, struct file_lock *fl)
4334{
4335 int res = 0;
4336 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
4337 case FL_POSIX:
4338 res = posix_lock_file_wait(file, fl);
4339 break;
4340 case FL_FLOCK:
4341 res = flock_lock_file_wait(file, fl);
4342 break;
4343 default:
4344 BUG();
4345 }
1da177e4
LT		 4346 return res;
4347}
4348
faf5f49c 4349struct nfs4_unlockdata {
911d1aaf
TM		 4350 struct nfs_locku_args arg;
4351 struct nfs_locku_res res;
faf5f49c
TM		 4352 struct nfs4_lock_state *lsp;
4353 struct nfs_open_context *ctx;
911d1aaf
TM		 4354 struct file_lock fl;
4355 const struct nfs_server *server;
26e976a8 4356 unsigned long timestamp;
faf5f49c
TM		 4357};
4358
911d1aaf
TM		 4359static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
4360 struct nfs_open_context *ctx,
4361 struct nfs4_lock_state *lsp,
4362 struct nfs_seqid *seqid)
4363{
4364 struct nfs4_unlockdata *p;
4365 struct inode *inode = lsp->ls_state->inode;
4366
8535b2be 4367 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 4368 if (p == NULL)
4369 return NULL;
4370 p->arg.fh = NFS_FH(inode);
4371 p->arg.fl = &p->fl;
4372 p->arg.seqid = seqid;
c1d51931 4373 p->res.seqid = seqid;
911d1aaf
TM		 4374 p->arg.stateid = &lsp->ls_stateid;
4375 p->lsp = lsp;
4376 atomic_inc(&lsp->ls_count);
4377 /* Ensure we don't close file until we're done freeing locks! */
4378 p->ctx = get_nfs_open_context(ctx);
4379 memcpy(&p->fl, fl, sizeof(p->fl));
4380 p->server = NFS_SERVER(inode);
4381 return p;
4382}
4383
06f814a3 4384static void nfs4_locku_release_calldata(void *data)
faf5f49c 4385{
963d8fe5 4386 struct nfs4_unlockdata *calldata = data;
911d1aaf 4387 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 4388 nfs4_put_lock_state(calldata->lsp);
4389 put_nfs_open_context(calldata->ctx);
4390 kfree(calldata);
faf5f49c
TM		 4391}
4392
963d8fe5 4393static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 4394{
963d8fe5 4395 struct nfs4_unlockdata *calldata = data;
faf5f49c 4396
14516c3a
TM		 4397 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
4398 return;
faf5f49c
TM		 4399 switch (task->tk_status) {
4400 case 0:
f597c537
TM		 4401 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
4402 &calldata->res.stateid);
26e976a8 4403 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 4404 break;
9e33bed5
TM		 4405 case -NFS4ERR_BAD_STATEID:
4406 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 4407 case -NFS4ERR_STALE_STATEID:
4408 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 4409 break;
4410 default:
9e33bed5 4411 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 4412 rpc_restart_call_prepare(task);
faf5f49c 4413 }
2b1bc308 4414 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4415}
4416
4ce70ada 4417static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 4418{
4ce70ada 4419 struct nfs4_unlockdata *calldata = data;
faf5f49c 4420
911d1aaf 4421 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
faf5f49c 4422 return;
795a88c9 4423 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5
TM		 4424 /* Note: exit _without_ running nfs4_locku_done */
4425 task->tk_action = NULL;
b75ad4cd 4426 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 4427 return;
4428 }
26e976a8 4429 calldata->timestamp = jiffies;
035168ab 4430 if (nfs4_setup_sequence(calldata->server,
a893693c 4431 &calldata->arg.seq_args,
2240a9e2
TM		 4432 &calldata->res.seq_res,
4433 task) != 0)
4434 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 4435}
4436
963d8fe5 4437static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 4438 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 4439 .rpc_call_done = nfs4_locku_done,
06f814a3 4440 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 4441};
4442
a5d16a4d
TM		 4443static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
4444 struct nfs_open_context *ctx,
4445 struct nfs4_lock_state *lsp,
4446 struct nfs_seqid *seqid)
4447{
4448 struct nfs4_unlockdata *data;
5138fde0
TM		 4449 struct rpc_message msg = {
4450 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
4451 .rpc_cred = ctx->cred,
4452 };
c970aa85
TM		 4453 struct rpc_task_setup task_setup_data = {
4454 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 4455 .rpc_message = &msg,
c970aa85 4456 .callback_ops = &nfs4_locku_ops,
101070ca 4457 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4458 .flags = RPC_TASK_ASYNC,
4459 };
a5d16a4d 4460
137d6aca
FF		 4461 /* Ensure this is an unlock - when canceling a lock, the
4462 * canceled lock is passed in, and it won't be an unlock.
4463 */
4464 fl->fl_type = F_UNLCK;
4465
a5d16a4d
TM		 4466 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
4467 if (data == NULL) {
4468 nfs_free_seqid(seqid);
4469 return ERR_PTR(-ENOMEM);
4470 }
4471
9d12b216 4472 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4473 msg.rpc_argp = &data->arg;
4474 msg.rpc_resp = &data->res;
c970aa85
TM		 4475 task_setup_data.callback_data = data;
4476 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 4477}
4478
faf5f49c
TM		 4479static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
4480{
19e03c57 4481 struct nfs_inode *nfsi = NFS_I(state->inode);
911d1aaf 4482 struct nfs_seqid *seqid;
1da177e4 4483 struct nfs4_lock_state *lsp;
06f814a3
TM		 4484 struct rpc_task *task;
4485 int status = 0;
536ff0f8 4486 unsigned char fl_flags = request->fl_flags;
faf5f49c 4487
8d0a8a9d 4488 status = nfs4_set_lock_state(state, request);
9b073574
TM		 4489 /* Unlock _before_ we do the RPC call */
4490 request->fl_flags |= FL_EXISTS;
19e03c57
TM		 4491 down_read(&nfsi->rwsem);
4492 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
4493 up_read(&nfsi->rwsem);
9b073574 4494 goto out;
19e03c57
TM		 4495 }
4496 up_read(&nfsi->rwsem);
8d0a8a9d 4497 if (status != 0)
9b073574
TM		 4498 goto out;
4499 /* Is this a delegated lock? */
4500 if (test_bit(NFS_DELEGATED_STATE, &state->flags))
4501 goto out;
8d0a8a9d 4502 lsp = request->fl_u.nfs4_fl.owner;
8535b2be 4503 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 4504 status = -ENOMEM;
911d1aaf 4505 if (seqid == NULL)
9b073574 4506 goto out;
cd3758e3 4507 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 4508 status = PTR_ERR(task);
4509 if (IS_ERR(task))
9b073574 4510 goto out;
a5d16a4d 4511 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 4512 rpc_put_task(task);
9b073574 4513out:
536ff0f8 4514 request->fl_flags = fl_flags;
1da177e4
LT		 4515 return status;
4516}
4517
a5d16a4d
TM		 4518struct nfs4_lockdata {
4519 struct nfs_lock_args arg;
4520 struct nfs_lock_res res;
4521 struct nfs4_lock_state *lsp;
4522 struct nfs_open_context *ctx;
4523 struct file_lock fl;
26e976a8 4524 unsigned long timestamp;
a5d16a4d
TM		 4525 int rpc_status;
4526 int cancelled;
66179efe 4527 struct nfs_server *server;
a5d16a4d
TM		 4528};
4529
4530static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 4531 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
4532 gfp_t gfp_mask)
1da177e4 4533{
a5d16a4d
TM		 4534 struct nfs4_lockdata *p;
4535 struct inode *inode = lsp->ls_state->inode;
1da177e4 4536 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 4537
8535b2be 4538 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 4539 if (p == NULL)
4540 return NULL;
4541
4542 p->arg.fh = NFS_FH(inode);
4543 p->arg.fl = &p->fl;
8535b2be 4544 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 4545 if (p->arg.open_seqid == NULL)
4546 goto out_free;
8535b2be 4547 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 4548 if (p->arg.lock_seqid == NULL)
2f74c0a0 4549 goto out_free_seqid;
a5d16a4d 4550 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 4551 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 4552 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 4553 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 4554 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 4555 p->lsp = lsp;
66179efe 4556 p->server = server;
a5d16a4d
TM		 4557 atomic_inc(&lsp->ls_count);
4558 p->ctx = get_nfs_open_context(ctx);
4559 memcpy(&p->fl, fl, sizeof(p->fl));
4560 return p;
2f74c0a0
TM		 4561out_free_seqid:
4562 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 4563out_free:
4564 kfree(p);
4565 return NULL;
4566}
4567
4568static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
4569{
4570 struct nfs4_lockdata *data = calldata;
4571 struct nfs4_state *state = data->lsp->ls_state;
06735b34 4572
3110ff80 4573 dprintk("%s: begin!\n", __func__);
2f74c0a0
TM		 4574 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
4575 return;
a5d16a4d
TM		 4576 /* Do we need to do an open_to_lock_owner? */
4577 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 4578 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 4579 goto out_release_lock_seqid;
8fe72bac 4580 }
a5d16a4d
TM		 4581 data->arg.open_stateid = &state->stateid;
4582 data->arg.new_lock_owner = 1;
c1d51931 4583 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 4584 } else
4585 data->arg.new_lock_owner = 0;
26e976a8 4586 data->timestamp = jiffies;
035168ab
TM		 4587 if (nfs4_setup_sequence(data->server,
4588 &data->arg.seq_args,
2240a9e2 4589 &data->res.seq_res,
d9afbd1b 4590 task) == 0)
66179efe 4591 return;
2240a9e2
TM		 4592 nfs_release_seqid(data->arg.open_seqid);
4593out_release_lock_seqid:
4594 nfs_release_seqid(data->arg.lock_seqid);
8fe72bac 4595 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 4596}
4597
a5d16a4d
TM		 4598static void nfs4_lock_done(struct rpc_task *task, void *calldata)
4599{
4600 struct nfs4_lockdata *data = calldata;
4601
3110ff80 4602 dprintk("%s: begin!\n", __func__);
a5d16a4d 4603
14516c3a
TM		 4604 if (!nfs4_sequence_done(task, &data->res.seq_res))
4605 return;
66179efe 4606
a5d16a4d 4607 data->rpc_status = task->tk_status;
a5d16a4d 4608 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 4609 if (data->rpc_status == 0)
4610 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
4611 else
4612 goto out;
4613 }
4614 if (data->rpc_status == 0) {
f597c537 4615 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 4616 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 4617 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 4618 }
a5d16a4d 4619out:
3110ff80 4620 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 4621}
4622
4623static void nfs4_lock_release(void *calldata)
4624{
4625 struct nfs4_lockdata *data = calldata;
4626
3110ff80 4627 dprintk("%s: begin!\n", __func__);
2f74c0a0 4628 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 4629 if (data->cancelled != 0) {
4630 struct rpc_task *task;
4631 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
4632 data->arg.lock_seqid);
4633 if (!IS_ERR(task))
bf294b41 4634 rpc_put_task_async(task);
3110ff80 4635 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 4636 } else
4637 nfs_free_seqid(data->arg.lock_seqid);
4638 nfs4_put_lock_state(data->lsp);
4639 put_nfs_open_context(data->ctx);
4640 kfree(data);
3110ff80 4641 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 4642}
4643
4644static const struct rpc_call_ops nfs4_lock_ops = {
4645 .rpc_call_prepare = nfs4_lock_prepare,
4646 .rpc_call_done = nfs4_lock_done,
4647 .rpc_release = nfs4_lock_release,
4648};
4649
2bee72a6
TM		 4650static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
4651{
2bee72a6
TM		 4652 switch (error) {
4653 case -NFS4ERR_ADMIN_REVOKED:
4654 case -NFS4ERR_BAD_STATEID:
ecac799a 4655 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 4656 if (new_lock_owner != 0 ||
795a88c9 4657 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 4658 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 4659 break;
4660 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4661 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 4662 case -NFS4ERR_EXPIRED:
4663 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 4664 };
4665}
4666
afe6c27c 4667static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 4668{
4669 struct nfs4_lockdata *data;
4670 struct rpc_task *task;
5138fde0
TM		 4671 struct rpc_message msg = {
4672 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
4673 .rpc_cred = state->owner->so_cred,
4674 };
c970aa85
TM		 4675 struct rpc_task_setup task_setup_data = {
4676 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 4677 .rpc_message = &msg,
c970aa85 4678 .callback_ops = &nfs4_lock_ops,
101070ca 4679 .workqueue = nfsiod_workqueue,
c970aa85
TM		 4680 .flags = RPC_TASK_ASYNC,
4681 };
a5d16a4d
TM		 4682 int ret;
4683
3110ff80 4684 dprintk("%s: begin!\n", __func__);
cd3758e3 4685 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 4686 fl->fl_u.nfs4_fl.owner,
4687 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 4688 if (data == NULL)
4689 return -ENOMEM;
4690 if (IS_SETLKW(cmd))
4691 data->arg.block = 1;
9d12b216 4692 nfs41_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 4693 msg.rpc_argp = &data->arg;
4694 msg.rpc_resp = &data->res;
c970aa85 4695 task_setup_data.callback_data = data;
8fe72bac
TM		 4696 if (recovery_type > NFS_LOCK_NEW) {
4697 if (recovery_type == NFS_LOCK_RECLAIM)
4698 data->arg.reclaim = NFS_LOCK_RECLAIM;
4699 nfs4_set_sequence_privileged(&data->arg.seq_args);
4700 }
c970aa85 4701 task = rpc_run_task(&task_setup_data);
7a1218a2 4702 if (IS_ERR(task))
a5d16a4d 4703 return PTR_ERR(task);
a5d16a4d
TM		 4704 ret = nfs4_wait_for_completion_rpc_task(task);
4705 if (ret == 0) {
4706 ret = data->rpc_status;
2bee72a6
TM		 4707 if (ret)
4708 nfs4_handle_setlk_error(data->server, data->lsp,
4709 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 4710 } else
4711 data->cancelled = 1;
e6b3c4db 4712 rpc_put_task(task);
3110ff80 4713 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 4714 return ret;
1da177e4
LT		 4715}
4716
4717static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
4718{
202b50dc 4719 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4720 struct nfs4_exception exception = {
4721 .inode = state->inode,
4722 };
202b50dc
TM		 4723 int err;
4724
4725 do {
42a2d13e
TM		 4726 /* Cache the lock if possible... */
4727 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4728 return 0;
afe6c27c 4729 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 4730 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 4731 break;
4732 nfs4_handle_exception(server, err, &exception);
4733 } while (exception.retry);
4734 return err;
1da177e4
LT		 4735}
4736
4737static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
4738{
202b50dc 4739 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 4740 struct nfs4_exception exception = {
4741 .inode = state->inode,
4742 };
202b50dc
TM		 4743 int err;
4744
6bfc93ef
TM		 4745 err = nfs4_set_lock_state(state, request);
4746 if (err != 0)
4747 return err;
202b50dc 4748 do {
42a2d13e
TM		 4749 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
4750 return 0;
afe6c27c 4751 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 4752 switch (err) {
4753 default:
4754 goto out;
4755 case -NFS4ERR_GRACE:
4756 case -NFS4ERR_DELAY:
4757 nfs4_handle_exception(server, err, &exception);
4758 err = 0;
4759 }
202b50dc 4760 } while (exception.retry);
a9ed2e25 4761out:
202b50dc 4762 return err;
1da177e4
LT		 4763}
4764
f062eb6c 4765#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 4766/**
4767 * nfs41_check_expired_locks - possibly free a lock stateid
4768 *
4769 * @state: NFSv4 state for an inode
4770 *
4771 * Returns NFS_OK if recovery for this stateid is now finished.
4772 * Otherwise a negative NFS4ERR value is returned.
4773 */
b01dd1d8 4774static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 4775{
eb64cf96 4776 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 4777 struct nfs4_lock_state *lsp;
f062eb6c
BS		 4778 struct nfs_server *server = NFS_SERVER(state->inode);
4779
b01dd1d8 4780 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 4781 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
b01dd1d8
BS		 4782 status = nfs41_test_stateid(server, &lsp->ls_stateid);
4783 if (status != NFS_OK) {
3e60ffdd
CL		 4784 /* Free the stateid unless the server
4785 * informs us the stateid is unrecognized. */
89af2739
CL		 4786 if (status != -NFS4ERR_BAD_STATEID)
4787 nfs41_free_stateid(server,
4788 &lsp->ls_stateid);
795a88c9 4789 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 4790 ret = status;
4791 }
4792 }
4793 };
4794
4795 return ret;
4796}
4797
4798static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
4799{
4800 int status = NFS_OK;
4801
4802 if (test_bit(LK_STATE_IN_USE, &state->flags))
4803 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 4804 if (status != NFS_OK)
4805 status = nfs4_lock_expired(state, request);
4806 return status;
f062eb6c
BS		 4807}
4808#endif
4809
1da177e4
LT		 4810static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4811{
19e03c57 4812 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 4813 unsigned char fl_flags = request->fl_flags;
8e469ebd 4814 int status = -ENOLCK;
1da177e4 4815
8e469ebd
TM		 4816 if ((fl_flags & FL_POSIX) &&
4817 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
4818 goto out;
6bfc93ef 4819 /* Is this a delegated open? */
6bfc93ef
TM		 4820 status = nfs4_set_lock_state(state, request);
4821 if (status != 0)
4822 goto out;
01c3b861
TM		 4823 request->fl_flags |= FL_ACCESS;
4824 status = do_vfs_lock(request->fl_file, request);
4825 if (status < 0)
4826 goto out;
19e03c57 4827 down_read(&nfsi->rwsem);
01c3b861 4828 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 4829 /* Yes: cache locks! */
01c3b861 4830 /* ...but avoid races with delegation recall... */
19e03c57
TM		 4831 request->fl_flags = fl_flags & ~FL_SLEEP;
4832 status = do_vfs_lock(request->fl_file, request);
4833 goto out_unlock;
01c3b861 4834 }
afe6c27c 4835 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 4836 if (status != 0)
01c3b861 4837 goto out_unlock;
6bfc93ef 4838 /* Note: we always want to sleep here! */
01c3b861 4839 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 4840 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 4841 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
4842 "manager!\n", __func__);
01c3b861 4843out_unlock:
19e03c57 4844 up_read(&nfsi->rwsem);
01c3b861
TM		 4845out:
4846 request->fl_flags = fl_flags;
1da177e4
LT		 4847 return status;
4848}
4849
4850static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
4851{
a1d0b5ee
TM		 4852 struct nfs4_exception exception = {
4853 .state = state,
05ffe24f 4854 .inode = state->inode,
a1d0b5ee 4855 };
1da177e4
LT		 4856 int err;
4857
4858 do {
965b5d67
TM		 4859 err = _nfs4_proc_setlk(state, cmd, request);
4860 if (err == -NFS4ERR_DENIED)
4861 err = -EAGAIN;
1da177e4 4862 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 4863 err, &exception);
1da177e4
LT		 4864 } while (exception.retry);
4865 return err;
4866}
4867
4868static int
4869nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
4870{
4871 struct nfs_open_context *ctx;
4872 struct nfs4_state *state;
4873 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
4874 int status;
4875
4876 /* verify open state */
cd3758e3 4877 ctx = nfs_file_open_context(filp);
1da177e4
LT		 4878 state = ctx->state;
4879
4880 if (request->fl_start < 0 || request->fl_end < 0)
4881 return -EINVAL;
4882
d953126a
TM		 4883 if (IS_GETLK(cmd)) {
4884 if (state != NULL)
4885 return nfs4_proc_getlk(state, F_GETLK, request);
4886 return 0;
4887 }
1da177e4
LT		 4888
4889 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
4890 return -EINVAL;
4891
d953126a
TM		 4892 if (request->fl_type == F_UNLCK) {
4893 if (state != NULL)
4894 return nfs4_proc_unlck(state, cmd, request);
4895 return 0;
4896 }
1da177e4 4897
d953126a
TM		 4898 if (state == NULL)
4899 return -ENOLCK;
55725513
TM		 4900 /*
4901 * Don't rely on the VFS having checked the file open mode,
4902 * since it won't do this for flock() locks.
4903 */
f44106e2 4904 switch (request->fl_type) {
55725513
TM		 4905 case F_RDLCK:
4906 if (!(filp->f_mode & FMODE_READ))
4907 return -EBADF;
4908 break;
4909 case F_WRLCK:
4910 if (!(filp->f_mode & FMODE_WRITE))
4911 return -EBADF;
4912 }
4913
1da177e4
LT		 4914 do {
4915 status = nfs4_proc_setlk(state, cmd, request);
4916 if ((status != -EAGAIN) || IS_SETLK(cmd))
4917 break;
4918 timeout = nfs4_set_lock_task_retry(timeout);
4919 status = -ERESTARTSYS;
4920 if (signalled())
4921 break;
4922 } while(status < 0);
1da177e4
LT		 4923 return status;
4924}
4925
888e694c
TM		 4926int nfs4_lock_delegation_recall(struct nfs4_state *state, struct file_lock *fl)
4927{
4928 struct nfs_server *server = NFS_SERVER(state->inode);
4929 struct nfs4_exception exception = { };
4930 int err;
4931
4932 err = nfs4_set_lock_state(state, fl);
4933 if (err != 0)
4934 goto out;
4935 do {
afe6c27c 4936 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
d5122201
TM		 4937 switch (err) {
4938 default:
a030889a
WAA		 4939 printk(KERN_ERR "NFS: %s: unhandled error "
4940 "%d.\n", __func__, err);
d5122201 4941 case 0:
965b5d67 4942 case -ESTALE:
d5122201
TM		 4943 goto out;
4944 case -NFS4ERR_EXPIRED:
0ced63d1 4945 nfs4_schedule_stateid_recovery(server, state);
d5122201 4946 case -NFS4ERR_STALE_CLIENTID:
965b5d67 4947 case -NFS4ERR_STALE_STATEID:
0400a6b0
TM		 4948 nfs4_schedule_lease_recovery(server->nfs_client);
4949 goto out;
74e7bb73
RL		 4950 case -NFS4ERR_BADSESSION:
4951 case -NFS4ERR_BADSLOT:
4952 case -NFS4ERR_BAD_HIGH_SLOT:
4953 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4954 case -NFS4ERR_DEADSESSION:
9f594791 4955 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
d5122201 4956 goto out;
965b5d67
TM		 4957 case -ERESTARTSYS:
4958 /*
4959 * The show must go on: exit, but mark the
4960 * stateid as needing recovery.
4961 */
a1d0b5ee 4962 case -NFS4ERR_DELEG_REVOKED:
965b5d67
TM		 4963 case -NFS4ERR_ADMIN_REVOKED:
4964 case -NFS4ERR_BAD_STATEID:
4965 case -NFS4ERR_OPENMODE:
0400a6b0 4966 nfs4_schedule_stateid_recovery(server, state);
965b5d67
TM		 4967 err = 0;
4968 goto out;
4969 case -ENOMEM:
4970 case -NFS4ERR_DENIED:
4971 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
4972 err = 0;
4973 goto out;
d5122201
TM		 4974 case -NFS4ERR_DELAY:
4975 break;
4976 }
888e694c
TM		 4977 err = nfs4_handle_exception(server, err, &exception);
4978 } while (exception.retry);
4979out:
4980 return err;
4981}
6b3b5496 4982
cf470c3e
TM		 4983struct nfs_release_lockowner_data {
4984 struct nfs4_lock_state *lsp;
5ae67c4f 4985 struct nfs_server *server;
cf470c3e
TM		 4986 struct nfs_release_lockowner_args args;
4987};
4988
d3c7b7cc
TM		 4989static void nfs4_release_lockowner_release(void *calldata)
4990{
cf470c3e 4991 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 4992 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 4993 kfree(calldata);
4994}
4995
17280175 4996static const struct rpc_call_ops nfs4_release_lockowner_ops = {
d3c7b7cc
TM		 4997 .rpc_release = nfs4_release_lockowner_release,
4998};
4999
cf470c3e 5000int nfs4_release_lockowner(struct nfs4_lock_state *lsp)
d3c7b7cc
TM		 5001{
5002 struct nfs_server *server = lsp->ls_state->owner->so_server;
cf470c3e 5003 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5004 struct rpc_message msg = {
5005 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5006 };
5007
5008 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e
TM		 5009 return -EINVAL;
5010 data = kmalloc(sizeof(*data), GFP_NOFS);
5011 if (!data)
5012 return -ENOMEM;
5013 data->lsp = lsp;
5ae67c4f 5014 data->server = server;
cf470c3e
TM		 5015 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5016 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5017 data->args.lock_owner.s_dev = server->s_dev;
5018 msg.rpc_argp = &data->args;
5019 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5020 return 0;
d3c7b7cc
TM		 5021}
5022
aa1870af
BF		 5023#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5024
64c2ce8b
AK		 5025static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5026 const void *buf, size_t buflen,
5027 int flags, int type)
6b3b5496 5028{
64c2ce8b
AK		 5029 if (strcmp(key, "") != 0)
5030 return -EINVAL;
4b580ee3 5031
64c2ce8b 5032 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5033}
5034
64c2ce8b
AK		 5035static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5036 void *buf, size_t buflen, int type)
6b3b5496 5037{
64c2ce8b
AK		 5038 if (strcmp(key, "") != 0)
5039 return -EINVAL;
aa1870af 5040
64c2ce8b 5041 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5042}
5043
64c2ce8b
AK		 5044static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5045 size_t list_len, const char *name,
5046 size_t name_len, int type)
6b3b5496 5047{
64c2ce8b 5048 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5049
096455a2
BF		 5050 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5051 return 0;
64c2ce8b
AK		 5052
5053 if (list && len <= list_len)
5054 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5055 return len;
6b3b5496
BF		 5056}
5057
533eb461
AA		 5058/*
5059 * nfs_fhget will use either the mounted_on_fileid or the fileid
5060 */
69aaaae1
TM		 5061static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5062{
533eb461
AA		 5063 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5064 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5065 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5066 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5067 return;
5068
5069 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5070 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5071 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5072 fattr->nlink = 2;
5073}
5074
f05d147f
BS		 5075static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5076 const struct qstr *name,
5077 struct nfs4_fs_locations *fs_locations,
5078 struct page *page)
683b57b4
TM		 5079{
5080 struct nfs_server *server = NFS_SERVER(dir);
5081 u32 bitmask[2] = {
361e624f 5082 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5083 };
5084 struct nfs4_fs_locations_arg args = {
5085 .dir_fh = NFS_FH(dir),
c228fd3a 5086 .name = name,
683b57b4
TM		 5087 .page = page,
5088 .bitmask = bitmask,
5089 };
22958463
BH		 5090 struct nfs4_fs_locations_res res = {
5091 .fs_locations = fs_locations,
5092 };
683b57b4
TM		 5093 struct rpc_message msg = {
5094 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5095 .rpc_argp = &args,
22958463 5096 .rpc_resp = &res,
683b57b4
TM		 5097 };
5098 int status;
5099
3110ff80 5100 dprintk("%s: start\n", __func__);
533eb461
AA		 5101
5102 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5103 * is not supported */
5104 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5105 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5106 else
5107 bitmask[0] |= FATTR4_WORD0_FILEID;
5108
c228fd3a 5109 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5110 fs_locations->server = server;
830b8e33 5111 fs_locations->nlocations = 0;
f05d147f 5112 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5113 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5114 return status;
5115}
5116
f05d147f
BS		 5117int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5118 const struct qstr *name,
5119 struct nfs4_fs_locations *fs_locations,
5120 struct page *page)
db0a9593
BS		 5121{
5122 struct nfs4_exception exception = { };
5123 int err;
5124 do {
5125 err = nfs4_handle_exception(NFS_SERVER(dir),
f05d147f 5126 _nfs4_proc_fs_locations(client, dir, name, fs_locations, page),
db0a9593
BS		 5127 &exception);
5128 } while (exception.retry);
5129 return err;
5130}
5131
5a5ea0d4
BS		 5132static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)
5133{
5134 int status;
5135 struct nfs4_secinfo_arg args = {
5136 .dir_fh = NFS_FH(dir),
5137 .name = name,
5138 };
5139 struct nfs4_secinfo_res res = {
5140 .flavors = flavors,
5141 };
5142 struct rpc_message msg = {
5143 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
5144 .rpc_argp = &args,
5145 .rpc_resp = &res,
5146 };
5147
5148 dprintk("NFS call secinfo %s\n", name->name);
5149 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
5150 dprintk("NFS reply secinfo: %d\n", status);
5151 return status;
5152}
5153
72de53ec
BS		 5154int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
5155 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 5156{
5157 struct nfs4_exception exception = { };
5158 int err;
5159 do {
5160 err = nfs4_handle_exception(NFS_SERVER(dir),
5161 _nfs4_proc_secinfo(dir, name, flavors),
5162 &exception);
5163 } while (exception.retry);
5164 return err;
5165}
5166
557134a3 5167#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 5168/*
5169 * Check the exchange flags returned by the server for invalid flags, having
5170 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
5171 * DS flags set.
5172 */
5173static int nfs4_check_cl_exchange_flags(u32 flags)
5174{
5175 if (flags & ~EXCHGID4_FLAG_MASK_R)
5176 goto out_inval;
5177 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
5178 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
5179 goto out_inval;
5180 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
5181 goto out_inval;
5182 return NFS_OK;
5183out_inval:
5184 return -NFS4ERR_INVAL;
5185}
5186
78fe0f41 5187static bool
79d4e1f0
CL		 5188nfs41_same_server_scope(struct nfs41_server_scope *a,
5189 struct nfs41_server_scope *b)
78fe0f41
WAA		 5190{
5191 if (a->server_scope_sz == b->server_scope_sz &&
5192 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
5193 return true;
5194
5195 return false;
5196}
5197
7c44f1ae
WAA		 5198/*
5199 * nfs4_proc_bind_conn_to_session()
5200 *
5201 * The 4.1 client currently uses the same TCP connection for the
5202 * fore and backchannel.
5203 */
2cf047c9 5204int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 5205{
5206 int status;
5207 struct nfs41_bind_conn_to_session_res res;
5208 struct rpc_message msg = {
5209 .rpc_proc =
5210 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
5211 .rpc_argp = clp,
5212 .rpc_resp = &res,
2cf047c9 5213 .rpc_cred = cred,
7c44f1ae
WAA		 5214 };
5215
5216 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 5217
5218 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
5219 if (unlikely(res.session == NULL)) {
5220 status = -ENOMEM;
5221 goto out;
5222 }
5223
5224 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5225 if (status == 0) {
5226 if (memcmp(res.session->sess_id.data,
5227 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
5228 dprintk("NFS: %s: Session ID mismatch\n", __func__);
5229 status = -EIO;
5230 goto out_session;
5231 }
5232 if (res.dir != NFS4_CDFS4_BOTH) {
5233 dprintk("NFS: %s: Unexpected direction from server\n",
5234 __func__);
5235 status = -EIO;
5236 goto out_session;
5237 }
5238 if (res.use_conn_in_rdma_mode) {
5239 dprintk("NFS: %s: Server returned RDMA mode = true\n",
5240 __func__);
5241 status = -EIO;
5242 goto out_session;
5243 }
5244 }
5245out_session:
5246 kfree(res.session);
5247out:
5248 dprintk("<-- %s status= %d\n", __func__, status);
5249 return status;
5250}
5251
99fe60d0
BH		 5252/*
5253 * nfs4_proc_exchange_id()
5254 *
6bbb4ae8
CL		 5255 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5256 *
99fe60d0
BH		 5257 * Since the clientid has expired, all compounds using sessions
5258 * associated with the stale clientid will be returning
5259 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
5260 * be in some phase of session reset.
5261 */
4d643d1d 5262int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
99fe60d0
BH		 5263{
5264 nfs4_verifier verifier;
5265 struct nfs41_exchange_id_args args = {
cd93710e 5266 .verifier = &verifier,
99fe60d0 5267 .client = clp,
357f54d6 5268 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER,
99fe60d0
BH		 5269 };
5270 struct nfs41_exchange_id_res res = {
32b01310 5271 0
99fe60d0
BH		 5272 };
5273 int status;
5274 struct rpc_message msg = {
5275 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
5276 .rpc_argp = &args,
5277 .rpc_resp = &res,
5278 .rpc_cred = cred,
5279 };
99fe60d0 5280
f092075d 5281 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 5282 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
5283 sizeof(args.id));
6bbb4ae8
CL		 5284 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
5285 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5286 args.id_len, args.id);
99fe60d0 5287
acdeb69d 5288 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 5289 GFP_NOFS);
acdeb69d 5290 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 5291 status = -ENOMEM;
5292 goto out;
5293 }
78fe0f41 5294
79d4e1f0 5295 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 5296 GFP_NOFS);
177313f1 5297 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 5298 status = -ENOMEM;
acdeb69d 5299 goto out_server_owner;
abe9a6d5 5300 }
78fe0f41 5301
bbafffd2 5302 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 5303 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 5304 status = -ENOMEM;
5305 goto out_server_scope;
5306 }
5307
1bd714f2 5308 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
177313f1 5309 if (status == 0)
32b01310 5310 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 5311
acdeb69d 5312 if (status == 0) {
32b01310
TM		 5313 clp->cl_clientid = res.clientid;
5314 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
5315 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
5316 clp->cl_seqid = res.seqid;
5317
acdeb69d
CL		 5318 kfree(clp->cl_serverowner);
5319 clp->cl_serverowner = res.server_owner;
5320 res.server_owner = NULL;
78fe0f41 5321
7d2ed9ac 5322 /* use the most recent implementation id */
59155546
CL		 5323 kfree(clp->cl_implid);
5324 clp->cl_implid = res.impl_id;
7d2ed9ac 5325
177313f1 5326 if (clp->cl_serverscope != NULL &&
79d4e1f0 5327 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 5328 res.server_scope)) {
5329 dprintk("%s: server_scope mismatch detected\n",
5330 __func__);
5331 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 5332 kfree(clp->cl_serverscope);
5333 clp->cl_serverscope = NULL;
78fe0f41
WAA		 5334 }
5335
177313f1 5336 if (clp->cl_serverscope == NULL) {
79d4e1f0 5337 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 5338 goto out;
5339 }
32b01310
TM		 5340 } else
5341 kfree(res.impl_id);
7d2ed9ac 5342
acdeb69d
CL		 5343out_server_owner:
5344 kfree(res.server_owner);
7d2ed9ac 5345out_server_scope:
abe9a6d5
WAA		 5346 kfree(res.server_scope);
5347out:
177313f1 5348 if (clp->cl_implid != NULL)
6bbb4ae8 5349 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 5350 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 5351 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 5352 clp->cl_implid->date.seconds,
5353 clp->cl_implid->date.nseconds);
6bbb4ae8 5354 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 5355 return status;
5356}
5357
66245539
TM		 5358static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
5359 struct rpc_cred *cred)
5360{
5361 struct rpc_message msg = {
5362 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
5363 .rpc_argp = clp,
5364 .rpc_cred = cred,
5365 };
5366 int status;
5367
5368 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
5369 if (status)
02c67525 5370 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 5371 "DESTROY_CLIENTID.", status, clp->cl_hostname);
5372 return status;
5373}
5374
5375static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
5376 struct rpc_cred *cred)
5377{
5378 unsigned int loop;
5379 int ret;
5380
5381 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
5382 ret = _nfs4_proc_destroy_clientid(clp, cred);
5383 switch (ret) {
5384 case -NFS4ERR_DELAY:
5385 case -NFS4ERR_CLIENTID_BUSY:
5386 ssleep(1);
5387 break;
5388 default:
5389 return ret;
5390 }
5391 }
5392 return 0;
5393}
5394
5395int nfs4_destroy_clientid(struct nfs_client *clp)
5396{
5397 struct rpc_cred *cred;
5398 int ret = 0;
5399
5400 if (clp->cl_mvops->minor_version < 1)
5401 goto out;
5402 if (clp->cl_exchange_flags == 0)
5403 goto out;
05f4c350
CL		 5404 if (clp->cl_preserve_clid)
5405 goto out;
66245539
TM		 5406 cred = nfs4_get_exchange_id_cred(clp);
5407 ret = nfs4_proc_destroy_clientid(clp, cred);
5408 if (cred)
5409 put_rpccred(cred);
5410 switch (ret) {
5411 case 0:
5412 case -NFS4ERR_STALE_CLIENTID:
5413 clp->cl_exchange_flags = 0;
5414 }
5415out:
5416 return ret;
5417}
5418
2050f0cc
AA		 5419struct nfs4_get_lease_time_data {
5420 struct nfs4_get_lease_time_args *args;
5421 struct nfs4_get_lease_time_res *res;
5422 struct nfs_client *clp;
5423};
5424
5425static void nfs4_get_lease_time_prepare(struct rpc_task *task,
5426 void *calldata)
5427{
2050f0cc
AA		 5428 struct nfs4_get_lease_time_data *data =
5429 (struct nfs4_get_lease_time_data *)calldata;
5430
5431 dprintk("--> %s\n", __func__);
5432 /* just setup sequence, do not trigger session recovery
5433 since we're invoked within one */
d9afbd1b
TM		 5434 nfs41_setup_sequence(data->clp->cl_session,
5435 &data->args->la_seq_args,
5436 &data->res->lr_seq_res,
5437 task);
2050f0cc
AA		 5438 dprintk("<-- %s\n", __func__);
5439}
5440
5441/*
5442 * Called from nfs4_state_manager thread for session setup, so don't recover
5443 * from sequence operation or clientid errors.
5444 */
5445static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
5446{
5447 struct nfs4_get_lease_time_data *data =
5448 (struct nfs4_get_lease_time_data *)calldata;
5449
5450 dprintk("--> %s\n", __func__);
14516c3a
TM		 5451 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
5452 return;
2050f0cc
AA		 5453 switch (task->tk_status) {
5454 case -NFS4ERR_DELAY:
5455 case -NFS4ERR_GRACE:
5456 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
5457 rpc_delay(task, NFS4_POLL_RETRY_MIN);
5458 task->tk_status = 0;
a8a4ae3a
AA		 5459 /* fall through */
5460 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 5461 rpc_restart_call_prepare(task);
2050f0cc
AA		 5462 return;
5463 }
2050f0cc
AA		 5464 dprintk("<-- %s\n", __func__);
5465}
5466
17280175 5467static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 5468 .rpc_call_prepare = nfs4_get_lease_time_prepare,
5469 .rpc_call_done = nfs4_get_lease_time_done,
5470};
5471
5472int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
5473{
5474 struct rpc_task *task;
5475 struct nfs4_get_lease_time_args args;
5476 struct nfs4_get_lease_time_res res = {
5477 .lr_fsinfo = fsinfo,
5478 };
5479 struct nfs4_get_lease_time_data data = {
5480 .args = &args,
5481 .res = &res,
5482 .clp = clp,
5483 };
5484 struct rpc_message msg = {
5485 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
5486 .rpc_argp = &args,
5487 .rpc_resp = &res,
5488 };
5489 struct rpc_task_setup task_setup = {
5490 .rpc_client = clp->cl_rpcclient,
5491 .rpc_message = &msg,
5492 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 5493 .callback_data = &data,
5494 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 5495 };
5496 int status;
5497
9d12b216 5498 nfs41_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 5499 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 5500 dprintk("--> %s\n", __func__);
5501 task = rpc_run_task(&task_setup);
5502
5503 if (IS_ERR(task))
5504 status = PTR_ERR(task);
5505 else {
5506 status = task->tk_status;
5507 rpc_put_task(task);
5508 }
5509 dprintk("<-- %s return %d\n", __func__, status);
5510
5511 return status;
5512}
5513
fc931582
AA		 5514/*
5515 * Initialize the values to be used by the client in CREATE_SESSION
5516 * If nfs4_init_session set the fore channel request and response sizes,
5517 * use them.
5518 *
5519 * Set the back channel max_resp_sz_cached to zero to force the client to
5520 * always set csa_cachethis to FALSE because the current implementation
5521 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
5522 */
5523static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
5524{
5525 struct nfs4_session *session = args->client->cl_session;
ae72ae67
TM		 5526 unsigned int mxrqst_sz = session->fc_target_max_rqst_sz,
5527 mxresp_sz = session->fc_target_max_resp_sz;
fc931582
AA		 5528
5529 if (mxrqst_sz == 0)
5530 mxrqst_sz = NFS_MAX_FILE_IO_SIZE;
5531 if (mxresp_sz == 0)
5532 mxresp_sz = NFS_MAX_FILE_IO_SIZE;
5533 /* Fore channel attributes */
fc931582
AA		 5534 args->fc_attrs.max_rqst_sz = mxrqst_sz;
5535 args->fc_attrs.max_resp_sz = mxresp_sz;
fc931582 5536 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 5537 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 5538
5539 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 5540 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 5541 __func__,
5542 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 5543 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 5544
5545 /* Back channel attributes */
fc931582
AA		 5546 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
5547 args->bc_attrs.max_resp_sz = PAGE_SIZE;
5548 args->bc_attrs.max_resp_sz_cached = 0;
5549 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5550 args->bc_attrs.max_reqs = 1;
5551
5552 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
5553 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
5554 __func__,
5555 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
5556 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
5557 args->bc_attrs.max_reqs);
5558}
5559
43c2e885 5560static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 5561{
43c2e885
BF		 5562 struct nfs4_channel_attrs *sent = &args->fc_attrs;
5563 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
5564
43c2e885
BF		 5565 if (rcvd->max_resp_sz > sent->max_resp_sz)
5566 return -EINVAL;
5567 /*
5568 * Our requested max_ops is the minimum we need; we're not
5569 * prepared to break up compounds into smaller pieces than that.
5570 * So, no point even trying to continue if the server won't
5571 * cooperate:
5572 */
5573 if (rcvd->max_ops < sent->max_ops)
5574 return -EINVAL;
5575 if (rcvd->max_reqs == 0)
5576 return -EINVAL;
b4b9a0c1
VG		 5577 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
5578 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 5579 return 0;
8d35301d
AA		 5580}
5581
43c2e885
BF		 5582static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
5583{
5584 struct nfs4_channel_attrs *sent = &args->bc_attrs;
5585 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 5586
43c2e885
BF		 5587 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
5588 return -EINVAL;
5589 if (rcvd->max_resp_sz < sent->max_resp_sz)
5590 return -EINVAL;
5591 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
5592 return -EINVAL;
5593 /* These would render the backchannel useless: */
b4b9a0c1 5594 if (rcvd->max_ops != sent->max_ops)
43c2e885 5595 return -EINVAL;
b4b9a0c1 5596 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 5597 return -EINVAL;
5598 return 0;
5599}
8d35301d 5600
8d35301d
AA		 5601static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
5602 struct nfs4_session *session)
5603{
43c2e885 5604 int ret;
8d35301d 5605
43c2e885
BF		 5606 ret = nfs4_verify_fore_channel_attrs(args, session);
5607 if (ret)
5608 return ret;
5609 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 5610}
5611
848f5bda
TM		 5612static int _nfs4_proc_create_session(struct nfs_client *clp,
5613 struct rpc_cred *cred)
fc931582
AA		 5614{
5615 struct nfs4_session *session = clp->cl_session;
5616 struct nfs41_create_session_args args = {
5617 .client = clp,
5618 .cb_program = NFS4_CALLBACK,
5619 };
5620 struct nfs41_create_session_res res = {
5621 .client = clp,
5622 };
5623 struct rpc_message msg = {
5624 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
5625 .rpc_argp = &args,
5626 .rpc_resp = &res,
848f5bda 5627 .rpc_cred = cred,
fc931582
AA		 5628 };
5629 int status;
5630
5631 nfs4_init_channel_attrs(&args);
0f91421e 5632 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 5633
1bd714f2 5634 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
fc931582 5635
43095d39 5636 if (!status) {
8d35301d
AA		 5637 /* Verify the session's negotiated channel_attrs values */
5638 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 5639 /* Increment the clientid slot sequence id */
5640 clp->cl_seqid++;
5641 }
5642
5643 return status;
5644}
5645
5646/*
5647 * Issues a CREATE_SESSION operation to the server.
5648 * It is the responsibility of the caller to verify the session is
5649 * expired before calling this routine.
5650 */
848f5bda 5651int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 5652{
5653 int status;
5654 unsigned *ptr;
fc931582
AA		 5655 struct nfs4_session *session = clp->cl_session;
5656
5657 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
5658
848f5bda 5659 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 5660 if (status)
5661 goto out;
5662
aacd5537
AA		 5663 /* Init or reset the session slot tables */
5664 status = nfs4_setup_session_slot_tables(session);
5665 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 5666 if (status)
5667 goto out;
5668
5669 ptr = (unsigned *)&session->sess_id.data[0];
5670 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
5671 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 5672out:
5673 dprintk("<-- %s\n", __func__);
5674 return status;
5675}
5676
0f3e66c6
AA		 5677/*
5678 * Issue the over-the-wire RPC DESTROY_SESSION.
5679 * The caller must serialize access to this routine.
5680 */
848f5bda
TM		 5681int nfs4_proc_destroy_session(struct nfs4_session *session,
5682 struct rpc_cred *cred)
0f3e66c6 5683{
848f5bda
TM		 5684 struct rpc_message msg = {
5685 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
5686 .rpc_argp = session,
5687 .rpc_cred = cred,
5688 };
0f3e66c6 5689 int status = 0;
0f3e66c6
AA		 5690
5691 dprintk("--> nfs4_proc_destroy_session\n");
5692
5693 /* session is still being setup */
5694 if (session->clp->cl_cons_state != NFS_CS_READY)
5695 return status;
5696
1bd714f2 5697 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
0f3e66c6
AA		 5698
5699 if (status)
08106ac7 5700 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 5701 "Session has been destroyed regardless...\n", status);
5702
5703 dprintk("<-- nfs4_proc_destroy_session\n");
5704 return status;
5705}
5706
fc01cea9
AA		 5707/*
5708 * Renew the cl_session lease.
5709 */
d5f8d3fe
TM		 5710struct nfs4_sequence_data {
5711 struct nfs_client *clp;
5712 struct nfs4_sequence_args args;
5713 struct nfs4_sequence_res res;
5714};
5715
dc96aef9
AB		 5716static void nfs41_sequence_release(void *data)
5717{
d5f8d3fe
TM		 5718 struct nfs4_sequence_data *calldata = data;
5719 struct nfs_client *clp = calldata->clp;
dc96aef9 5720
7135840f
AB		 5721 if (atomic_read(&clp->cl_count) > 1)
5722 nfs4_schedule_state_renewal(clp);
5723 nfs_put_client(clp);
d5f8d3fe 5724 kfree(calldata);
dc96aef9
AB		 5725}
5726
aa5190d0
TM		 5727static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5728{
5729 switch(task->tk_status) {
5730 case -NFS4ERR_DELAY:
aa5190d0
TM		 5731 rpc_delay(task, NFS4_POLL_RETRY_MAX);
5732 return -EAGAIN;
5733 default:
0400a6b0 5734 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5735 }
5736 return 0;
5737}
5738
dc96aef9 5739static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 5740{
d5f8d3fe
TM		 5741 struct nfs4_sequence_data *calldata = data;
5742 struct nfs_client *clp = calldata->clp;
fc01cea9 5743
14516c3a
TM		 5744 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
5745 return;
fc01cea9
AA		 5746
5747 if (task->tk_status < 0) {
5748 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 5749 if (atomic_read(&clp->cl_count) == 1)
5750 goto out;
fc01cea9 5751
aa5190d0
TM		 5752 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
5753 rpc_restart_call_prepare(task);
fc01cea9
AA		 5754 return;
5755 }
5756 }
fc01cea9 5757 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 5758out:
fc01cea9
AA		 5759 dprintk("<-- %s\n", __func__);
5760}
5761
5762static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
5763{
d5f8d3fe
TM		 5764 struct nfs4_sequence_data *calldata = data;
5765 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 5766 struct nfs4_sequence_args *args;
5767 struct nfs4_sequence_res *res;
5768
fc01cea9
AA		 5769 args = task->tk_msg.rpc_argp;
5770 res = task->tk_msg.rpc_resp;
5771
d9afbd1b 5772 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 5773}
5774
5775static const struct rpc_call_ops nfs41_sequence_ops = {
5776 .rpc_call_done = nfs41_sequence_call_done,
5777 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 5778 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 5779};
5780
8fe72bac
TM		 5781static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
5782 struct rpc_cred *cred,
5783 bool is_privileged)
fc01cea9 5784{
d5f8d3fe 5785 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 5786 struct rpc_message msg = {
5787 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
5788 .rpc_cred = cred,
5789 };
71ac6da9
TM		 5790 struct rpc_task_setup task_setup_data = {
5791 .rpc_client = clp->cl_rpcclient,
5792 .rpc_message = &msg,
8fe72bac 5793 .callback_ops = &nfs41_sequence_ops,
71ac6da9
TM		 5794 .flags = RPC_TASK_ASYNC | RPC_TASK_SOFT,
5795 };
fc01cea9 5796
7135840f 5797 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 5798 return ERR_PTR(-EIO);
dfb4f309 5799 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 5800 if (calldata == NULL) {
7135840f 5801 nfs_put_client(clp);
71ac6da9 5802 return ERR_PTR(-ENOMEM);
fc01cea9 5803 }
9d12b216 5804 nfs41_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 5805 if (is_privileged)
5806 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 5807 msg.rpc_argp = &calldata->args;
5808 msg.rpc_resp = &calldata->res;
5809 calldata->clp = clp;
71ac6da9 5810 task_setup_data.callback_data = calldata;
fc01cea9 5811
71ac6da9
TM		 5812 return rpc_run_task(&task_setup_data);
5813}
5814
2f60ea6b 5815static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 5816{
5817 struct rpc_task *task;
5818 int ret = 0;
5819
2f60ea6b
TM		 5820 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
5821 return 0;
8fe72bac 5822 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 5823 if (IS_ERR(task))
5824 ret = PTR_ERR(task);
5825 else
bf294b41 5826 rpc_put_task_async(task);
71ac6da9
TM		 5827 dprintk("<-- %s status=%d\n", __func__, ret);
5828 return ret;
5829}
5830
5831static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
5832{
5833 struct rpc_task *task;
5834 int ret;
5835
8fe72bac 5836 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 5837 if (IS_ERR(task)) {
5838 ret = PTR_ERR(task);
5839 goto out;
5840 }
5841 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 5842 if (!ret) {
5843 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
5844
5845 if (task->tk_status == 0)
5846 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 5847 ret = task->tk_status;
b4410c2f 5848 }
71ac6da9
TM		 5849 rpc_put_task(task);
5850out:
5851 dprintk("<-- %s status=%d\n", __func__, ret);
5852 return ret;
fc01cea9
AA		 5853}
5854
fce5c838
RL		 5855struct nfs4_reclaim_complete_data {
5856 struct nfs_client *clp;
5857 struct nfs41_reclaim_complete_args arg;
5858 struct nfs41_reclaim_complete_res res;
5859};
5860
5861static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
5862{
5863 struct nfs4_reclaim_complete_data *calldata = data;
5864
d9afbd1b
TM		 5865 nfs41_setup_sequence(calldata->clp->cl_session,
5866 &calldata->arg.seq_args,
5867 &calldata->res.seq_res,
5868 task);
fce5c838
RL		 5869}
5870
aa5190d0
TM		 5871static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
5872{
5873 switch(task->tk_status) {
5874 case 0:
5875 case -NFS4ERR_COMPLETE_ALREADY:
5876 case -NFS4ERR_WRONG_CRED: /* What to do here? */
5877 break;
5878 case -NFS4ERR_DELAY:
aa5190d0 5879 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 5880 /* fall through */
5881 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 5882 return -EAGAIN;
5883 default:
0400a6b0 5884 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 5885 }
5886 return 0;
5887}
5888
fce5c838
RL		 5889static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
5890{
5891 struct nfs4_reclaim_complete_data *calldata = data;
5892 struct nfs_client *clp = calldata->clp;
5893 struct nfs4_sequence_res *res = &calldata->res.seq_res;
5894
5895 dprintk("--> %s\n", __func__);
14516c3a
TM		 5896 if (!nfs41_sequence_done(task, res))
5897 return;
fce5c838 5898
aa5190d0
TM		 5899 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
5900 rpc_restart_call_prepare(task);
5901 return;
5902 }
fce5c838
RL		 5903 dprintk("<-- %s\n", __func__);
5904}
5905
5906static void nfs4_free_reclaim_complete_data(void *data)
5907{
5908 struct nfs4_reclaim_complete_data *calldata = data;
5909
5910 kfree(calldata);
5911}
5912
5913static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
5914 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
5915 .rpc_call_done = nfs4_reclaim_complete_done,
5916 .rpc_release = nfs4_free_reclaim_complete_data,
5917};
5918
5919/*
5920 * Issue a global reclaim complete.
5921 */
5922static int nfs41_proc_reclaim_complete(struct nfs_client *clp)
5923{
5924 struct nfs4_reclaim_complete_data *calldata;
5925 struct rpc_task *task;
5926 struct rpc_message msg = {
5927 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
5928 };
5929 struct rpc_task_setup task_setup_data = {
5930 .rpc_client = clp->cl_rpcclient,
5931 .rpc_message = &msg,
5932 .callback_ops = &nfs4_reclaim_complete_call_ops,
5933 .flags = RPC_TASK_ASYNC,
5934 };
5935 int status = -ENOMEM;
5936
5937 dprintk("--> %s\n", __func__);
8535b2be 5938 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 5939 if (calldata == NULL)
5940 goto out;
5941 calldata->clp = clp;
5942 calldata->arg.one_fs = 0;
fce5c838 5943
9d12b216 5944 nfs41_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 5945 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 5946 msg.rpc_argp = &calldata->arg;
5947 msg.rpc_resp = &calldata->res;
5948 task_setup_data.callback_data = calldata;
5949 task = rpc_run_task(&task_setup_data);
acf82b85 5950 if (IS_ERR(task)) {
fce5c838 5951 status = PTR_ERR(task);
acf82b85
DC		 5952 goto out;
5953 }
c34c32ea
AA		 5954 status = nfs4_wait_for_completion_rpc_task(task);
5955 if (status == 0)
5956 status = task->tk_status;
fce5c838 5957 rpc_put_task(task);
acf82b85 5958 return 0;
fce5c838
RL		 5959out:
5960 dprintk("<-- %s status=%d\n", __func__, status);
5961 return status;
5962}
b1f69b75
AA		 5963
5964static void
5965nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
5966{
5967 struct nfs4_layoutget *lgp = calldata;
c31663d4 5968 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 5969 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 5970
5971 dprintk("--> %s\n", __func__);
c31663d4
FI		 5972 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
5973 * right now covering the LAYOUTGET we are about to send.
5974 * However, that is not so catastrophic, and there seems
5975 * to be no way to prevent it completely.
5976 */
6ba7db34 5977 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 5978 &lgp->res.seq_res, task))
b1f69b75 5979 return;
cf7d63f1
FI		 5980 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
5981 NFS_I(lgp->args.inode)->layout,
5982 lgp->args.ctx->state)) {
5983 rpc_exit(task, NFS4_OK);
cf7d63f1 5984 }
b1f69b75
AA		 5985}
5986
5987static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
5988{
5989 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 5990 struct inode *inode = lgp->args.inode;
5991 struct nfs_server *server = NFS_SERVER(inode);
5992 struct pnfs_layout_hdr *lo;
5993 struct nfs4_state *state = NULL;
b1f69b75
AA		 5994
5995 dprintk("--> %s\n", __func__);
5996
6ba7db34 5997 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 5998 goto out;
b1f69b75
AA		 5999
6000 switch (task->tk_status) {
6001 case 0:
ee314c2a 6002 goto out;
b1f69b75
AA		 6003 case -NFS4ERR_LAYOUTTRYLATER:
6004 case -NFS4ERR_RECALLCONFLICT:
6005 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 6006 break;
6007 case -NFS4ERR_EXPIRED:
6008 case -NFS4ERR_BAD_STATEID:
6009 spin_lock(&inode->i_lock);
6010 lo = NFS_I(inode)->layout;
6011 if (!lo || list_empty(&lo->plh_segs)) {
6012 spin_unlock(&inode->i_lock);
6013 /* If the open stateid was bad, then recover it. */
6014 state = lgp->args.ctx->state;
6015 } else {
6016 LIST_HEAD(head);
6017
6018 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
6019 spin_unlock(&inode->i_lock);
6020 /* Mark the bad layout state as invalid, then
6021 * retry using the open stateid. */
6022 pnfs_free_lseg_list(&head);
b1f69b75
AA		 6023 }
6024 }
ee314c2a
TM		 6025 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
6026 rpc_restart_call_prepare(task);
6027out:
b1f69b75
AA		 6028 dprintk("<-- %s\n", __func__);
6029}
6030
8554116e
IK		 6031static size_t max_response_pages(struct nfs_server *server)
6032{
6033 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
6034 return nfs_page_array_len(0, max_resp_sz);
6035}
6036
6037static void nfs4_free_pages(struct page **pages, size_t size)
6038{
6039 int i;
6040
6041 if (!pages)
6042 return;
6043
6044 for (i = 0; i < size; i++) {
6045 if (!pages[i])
6046 break;
6047 __free_page(pages[i]);
6048 }
6049 kfree(pages);
6050}
6051
6052static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
6053{
6054 struct page **pages;
6055 int i;
6056
6057 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
6058 if (!pages) {
6059 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
6060 return NULL;
6061 }
6062
6063 for (i = 0; i < size; i++) {
6064 pages[i] = alloc_page(gfp_flags);
6065 if (!pages[i]) {
6066 dprintk("%s: failed to allocate page\n", __func__);
6067 nfs4_free_pages(pages, size);
6068 return NULL;
6069 }
6070 }
6071
6072 return pages;
6073}
6074
b1f69b75
AA		 6075static void nfs4_layoutget_release(void *calldata)
6076{
6077 struct nfs4_layoutget *lgp = calldata;
8554116e
IK		 6078 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6079 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6080
6081 dprintk("--> %s\n", __func__);
8554116e 6082 nfs4_free_pages(lgp->args.layout.pages, max_pages);
b1f69b75
AA		 6083 put_nfs_open_context(lgp->args.ctx);
6084 kfree(calldata);
6085 dprintk("<-- %s\n", __func__);
6086}
6087
6088static const struct rpc_call_ops nfs4_layoutget_call_ops = {
6089 .rpc_call_prepare = nfs4_layoutget_prepare,
6090 .rpc_call_done = nfs4_layoutget_done,
6091 .rpc_release = nfs4_layoutget_release,
6092};
6093
a0b0a6e3
TM		 6094struct pnfs_layout_segment *
6095nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75
AA		 6096{
6097 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
8554116e 6098 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 6099 struct rpc_task *task;
6100 struct rpc_message msg = {
6101 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
6102 .rpc_argp = &lgp->args,
6103 .rpc_resp = &lgp->res,
6104 };
6105 struct rpc_task_setup task_setup_data = {
6106 .rpc_client = server->client,
6107 .rpc_message = &msg,
6108 .callback_ops = &nfs4_layoutget_call_ops,
6109 .callback_data = lgp,
6110 .flags = RPC_TASK_ASYNC,
6111 };
a0b0a6e3 6112 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 6113 int status = 0;
6114
6115 dprintk("--> %s\n", __func__);
6116
8554116e
IK		 6117 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
6118 if (!lgp->args.layout.pages) {
6119 nfs4_layoutget_release(lgp);
a0b0a6e3 6120 return ERR_PTR(-ENOMEM);
8554116e
IK		 6121 }
6122 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
6123
35124a09 6124 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 6125 lgp->res.seq_res.sr_slot = NULL;
9d12b216 6126 nfs41_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
b1f69b75
AA		 6127 task = rpc_run_task(&task_setup_data);
6128 if (IS_ERR(task))
a0b0a6e3 6129 return ERR_CAST(task);
b1f69b75 6130 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 6131 if (status == 0)
6132 status = task->tk_status;
6133 if (status == 0)
a0b0a6e3 6134 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 6135 rpc_put_task(task);
6136 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 6137 if (status)
6138 return ERR_PTR(status);
6139 return lseg;
b1f69b75
AA		 6140}
6141
cbe82603
BH		 6142static void
6143nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
6144{
6145 struct nfs4_layoutreturn *lrp = calldata;
6146
6147 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 6148 nfs41_setup_sequence(lrp->clp->cl_session,
6149 &lrp->args.seq_args,
6150 &lrp->res.seq_res,
6151 task);
cbe82603
BH		 6152}
6153
6154static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
6155{
6156 struct nfs4_layoutreturn *lrp = calldata;
6157 struct nfs_server *server;
6158
6159 dprintk("--> %s\n", __func__);
6160
6ba7db34 6161 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 6162 return;
6163
6164 server = NFS_SERVER(lrp->args.inode);
6165 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 6166 rpc_restart_call_prepare(task);
cbe82603
BH		 6167 return;
6168 }
cbe82603
BH		 6169 dprintk("<-- %s\n", __func__);
6170}
6171
6172static void nfs4_layoutreturn_release(void *calldata)
6173{
6174 struct nfs4_layoutreturn *lrp = calldata;
849b286f 6175 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 6176
6177 dprintk("--> %s\n", __func__);
849b286f
TM		 6178 spin_lock(&lo->plh_inode->i_lock);
6179 if (lrp->res.lrs_present)
6180 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
6181 lo->plh_block_lgets--;
6182 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 6183 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 6184 kfree(calldata);
6185 dprintk("<-- %s\n", __func__);
6186}
6187
6188static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
6189 .rpc_call_prepare = nfs4_layoutreturn_prepare,
6190 .rpc_call_done = nfs4_layoutreturn_done,
6191 .rpc_release = nfs4_layoutreturn_release,
6192};
6193
6194int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
6195{
6196 struct rpc_task *task;
6197 struct rpc_message msg = {
6198 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
6199 .rpc_argp = &lrp->args,
6200 .rpc_resp = &lrp->res,
6201 };
6202 struct rpc_task_setup task_setup_data = {
6203 .rpc_client = lrp->clp->cl_rpcclient,
6204 .rpc_message = &msg,
6205 .callback_ops = &nfs4_layoutreturn_call_ops,
6206 .callback_data = lrp,
6207 };
6208 int status;
6209
6210 dprintk("--> %s\n", __func__);
9d12b216 6211 nfs41_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 6212 task = rpc_run_task(&task_setup_data);
6213 if (IS_ERR(task))
6214 return PTR_ERR(task);
6215 status = task->tk_status;
6216 dprintk("<-- %s status=%d\n", __func__, status);
6217 rpc_put_task(task);
6218 return status;
6219}
6220
7f11d8d3
AA		 6221/*
6222 * Retrieve the list of Data Server devices from the MDS.
6223 */
6224static int _nfs4_getdevicelist(struct nfs_server *server,
6225 const struct nfs_fh *fh,
6226 struct pnfs_devicelist *devlist)
6227{
6228 struct nfs4_getdevicelist_args args = {
6229 .fh = fh,
6230 .layoutclass = server->pnfs_curr_ld->id,
6231 };
6232 struct nfs4_getdevicelist_res res = {
6233 .devlist = devlist,
6234 };
6235 struct rpc_message msg = {
6236 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
6237 .rpc_argp = &args,
6238 .rpc_resp = &res,
6239 };
6240 int status;
6241
6242 dprintk("--> %s\n", __func__);
6243 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
6244 &res.seq_res, 0);
6245 dprintk("<-- %s status=%d\n", __func__, status);
6246 return status;
6247}
6248
6249int nfs4_proc_getdevicelist(struct nfs_server *server,
6250 const struct nfs_fh *fh,
6251 struct pnfs_devicelist *devlist)
6252{
6253 struct nfs4_exception exception = { };
6254 int err;
6255
6256 do {
6257 err = nfs4_handle_exception(server,
6258 _nfs4_getdevicelist(server, fh, devlist),
6259 &exception);
6260 } while (exception.retry);
6261
6262 dprintk("%s: err=%d, num_devs=%u\n", __func__,
6263 err, devlist->num_devs);
6264
6265 return err;
6266}
6267EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
6268
b1f69b75
AA		 6269static int
6270_nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6271{
6272 struct nfs4_getdeviceinfo_args args = {
6273 .pdev = pdev,
6274 };
6275 struct nfs4_getdeviceinfo_res res = {
6276 .pdev = pdev,
6277 };
6278 struct rpc_message msg = {
6279 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
6280 .rpc_argp = &args,
6281 .rpc_resp = &res,
6282 };
6283 int status;
6284
6285 dprintk("--> %s\n", __func__);
7c513058 6286 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 6287 dprintk("<-- %s status=%d\n", __func__, status);
6288
6289 return status;
6290}
6291
6292int nfs4_proc_getdeviceinfo(struct nfs_server *server, struct pnfs_device *pdev)
6293{
6294 struct nfs4_exception exception = { };
6295 int err;
6296
6297 do {
6298 err = nfs4_handle_exception(server,
6299 _nfs4_proc_getdeviceinfo(server, pdev),
6300 &exception);
6301 } while (exception.retry);
6302 return err;
6303}
6304EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
6305
863a3c6c
AA		 6306static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
6307{
6308 struct nfs4_layoutcommit_data *data = calldata;
6309 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 6310 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 6311
d9afbd1b
TM		 6312 nfs41_setup_sequence(session,
6313 &data->args.seq_args,
6314 &data->res.seq_res,
6315 task);
863a3c6c
AA		 6316}
6317
6318static void
6319nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
6320{
6321 struct nfs4_layoutcommit_data *data = calldata;
6322 struct nfs_server *server = NFS_SERVER(data->args.inode);
6323
6ba7db34 6324 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 6325 return;
6326
6327 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 6328 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
6329 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
6330 case -NFS4ERR_BADLAYOUT: /* no layout */
6331 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 6332 task->tk_status = 0;
e59d27e0
TM		 6333 break;
6334 case 0:
863a3c6c
AA		 6335 nfs_post_op_update_inode_force_wcc(data->args.inode,
6336 data->res.fattr);
e59d27e0
TM		 6337 break;
6338 default:
6339 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
6340 rpc_restart_call_prepare(task);
6341 return;
6342 }
6343 }
863a3c6c
AA		 6344}
6345
6346static void nfs4_layoutcommit_release(void *calldata)
6347{
6348 struct nfs4_layoutcommit_data *data = calldata;
a9bae566 6349 struct pnfs_layout_segment *lseg, *tmp;
92407e75 6350 unsigned long *bitlock = &NFS_I(data->args.inode)->flags;
863a3c6c 6351
db29c089 6352 pnfs_cleanup_layoutcommit(data);
863a3c6c 6353 /* Matched by references in pnfs_set_layoutcommit */
a9bae566
PT		 6354 list_for_each_entry_safe(lseg, tmp, &data->lseg_list, pls_lc_list) {
6355 list_del_init(&lseg->pls_lc_list);
6356 if (test_and_clear_bit(NFS_LSEG_LAYOUTCOMMIT,
6357 &lseg->pls_flags))
9369a431 6358 pnfs_put_lseg(lseg);
a9bae566 6359 }
92407e75
PT		 6360
6361 clear_bit_unlock(NFS_INO_LAYOUTCOMMITTING, bitlock);
6362 smp_mb__after_clear_bit();
6363 wake_up_bit(bitlock, NFS_INO_LAYOUTCOMMITTING);
6364
863a3c6c
AA		 6365 put_rpccred(data->cred);
6366 kfree(data);
6367}
6368
6369static const struct rpc_call_ops nfs4_layoutcommit_ops = {
6370 .rpc_call_prepare = nfs4_layoutcommit_prepare,
6371 .rpc_call_done = nfs4_layoutcommit_done,
6372 .rpc_release = nfs4_layoutcommit_release,
6373};
6374
6375int
ef311537 6376nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 6377{
6378 struct rpc_message msg = {
6379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
6380 .rpc_argp = &data->args,
6381 .rpc_resp = &data->res,
6382 .rpc_cred = data->cred,
6383 };
6384 struct rpc_task_setup task_setup_data = {
6385 .task = &data->task,
6386 .rpc_client = NFS_CLIENT(data->args.inode),
6387 .rpc_message = &msg,
6388 .callback_ops = &nfs4_layoutcommit_ops,
6389 .callback_data = data,
6390 .flags = RPC_TASK_ASYNC,
6391 };
6392 struct rpc_task *task;
6393 int status = 0;
6394
6395 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
6396 "lbw: %llu inode %lu\n",
6397 data->task.tk_pid, sync,
6398 data->args.lastbytewritten,
6399 data->args.inode->i_ino);
6400
9d12b216 6401 nfs41_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 6402 task = rpc_run_task(&task_setup_data);
6403 if (IS_ERR(task))
6404 return PTR_ERR(task);
ef311537 6405 if (sync == false)
863a3c6c
AA		 6406 goto out;
6407 status = nfs4_wait_for_completion_rpc_task(task);
6408 if (status != 0)
6409 goto out;
6410 status = task->tk_status;
6411out:
6412 dprintk("%s: status %d\n", __func__, status);
6413 rpc_put_task(task);
6414 return status;
6415}
fca78d6d
BS		 6416
6417static int
6418_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6419 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6420{
6421 struct nfs41_secinfo_no_name_args args = {
6422 .style = SECINFO_STYLE_CURRENT_FH,
6423 };
6424 struct nfs4_secinfo_res res = {
6425 .flavors = flavors,
6426 };
6427 struct rpc_message msg = {
6428 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
6429 .rpc_argp = &args,
6430 .rpc_resp = &res,
6431 };
6432 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
6433}
6434
6435static int
6436nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
6437 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
6438{
6439 struct nfs4_exception exception = { };
6440 int err;
6441 do {
6442 err = _nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6443 switch (err) {
6444 case 0:
6445 case -NFS4ERR_WRONGSEC:
6446 case -NFS4ERR_NOTSUPP:
05e9cfb4 6447 goto out;
fca78d6d
BS		 6448 default:
6449 err = nfs4_handle_exception(server, err, &exception);
6450 }
6451 } while (exception.retry);
05e9cfb4 6452out:
fca78d6d
BS		 6453 return err;
6454}
6455
6456static int
6457nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
6458 struct nfs_fsinfo *info)
6459{
6460 int err;
6461 struct page *page;
6462 rpc_authflavor_t flavor;
6463 struct nfs4_secinfo_flavors *flavors;
6464
6465 page = alloc_page(GFP_KERNEL);
6466 if (!page) {
6467 err = -ENOMEM;
6468 goto out;
6469 }
6470
6471 flavors = page_address(page);
6472 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
6473
6474 /*
6475 * Fall back on "guess and check" method if
6476 * the server doesn't support SECINFO_NO_NAME
6477 */
6478 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
6479 err = nfs4_find_root_sec(server, fhandle, info);
6480 goto out_freepage;
6481 }
6482 if (err)
6483 goto out_freepage;
6484
6485 flavor = nfs_find_best_sec(flavors);
6486 if (err == 0)
6487 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
6488
6489out_freepage:
6490 put_page(page);
6491 if (err == -EACCES)
6492 return -EPERM;
6493out:
6494 return err;
6495}
1cab0652
BS		 6496
6497static int _nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6498{
6499 int status;
6500 struct nfs41_test_stateid_args args = {
1cab0652 6501 .stateid = stateid,
7d974794
BS		 6502 };
6503 struct nfs41_test_stateid_res res;
6504 struct rpc_message msg = {
6505 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
6506 .rpc_argp = &args,
6507 .rpc_resp = &res,
6508 };
1cab0652 6509
38527b15 6510 dprintk("NFS call test_stateid %p\n", stateid);
9d12b216 6511 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac
TM		 6512 nfs4_set_sequence_privileged(&args.seq_args);
6513 status = nfs4_call_sync_sequence(server->client, server, &msg,
6514 &args.seq_args, &res.seq_res);
38527b15
CL		 6515 if (status != NFS_OK) {
6516 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 6517 return status;
38527b15
CL		 6518 }
6519 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 6520 return -res.status;
7d974794
BS		 6521}
6522
38527b15
CL		 6523/**
6524 * nfs41_test_stateid - perform a TEST_STATEID operation
6525 *
6526 * @server: server / transport on which to perform the operation
6527 * @stateid: state ID to test
6528 *
6529 * Returns NFS_OK if the server recognizes that "stateid" is valid.
6530 * Otherwise a negative NFS4ERR value is returned if the operation
6531 * failed or the state ID is not currently valid.
6532 */
1cab0652 6533static int nfs41_test_stateid(struct nfs_server *server, nfs4_stateid *stateid)
7d974794
BS		 6534{
6535 struct nfs4_exception exception = { };
6536 int err;
6537 do {
377e507d
CL		 6538 err = _nfs41_test_stateid(server, stateid);
6539 if (err != -NFS4ERR_DELAY)
6540 break;
6541 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 6542 } while (exception.retry);
6543 return err;
6544}
9aeda35f 6545
1cab0652 6546static int _nfs4_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f 6547{
9aeda35f 6548 struct nfs41_free_stateid_args args = {
1cab0652 6549 .stateid = stateid,
9aeda35f
BS		 6550 };
6551 struct nfs41_free_stateid_res res;
6552 struct rpc_message msg = {
6553 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
6554 .rpc_argp = &args,
6555 .rpc_resp = &res,
6556 };
38527b15 6557 int status;
9aeda35f 6558
38527b15 6559 dprintk("NFS call free_stateid %p\n", stateid);
9d12b216 6560 nfs41_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 6561 nfs4_set_sequence_privileged(&args.seq_args);
38527b15 6562 status = nfs4_call_sync_sequence(server->client, server, &msg,
8fe72bac 6563 &args.seq_args, &res.seq_res);
38527b15
CL		 6564 dprintk("NFS reply free_stateid: %d\n", status);
6565 return status;
9aeda35f
BS		 6566}
6567
38527b15
CL		 6568/**
6569 * nfs41_free_stateid - perform a FREE_STATEID operation
6570 *
6571 * @server: server / transport on which to perform the operation
6572 * @stateid: state ID to release
6573 *
6574 * Returns NFS_OK if the server freed "stateid". Otherwise a
6575 * negative NFS4ERR value is returned.
6576 */
1cab0652 6577static int nfs41_free_stateid(struct nfs_server *server, nfs4_stateid *stateid)
9aeda35f
BS		 6578{
6579 struct nfs4_exception exception = { };
6580 int err;
6581 do {
377e507d
CL		 6582 err = _nfs4_free_stateid(server, stateid);
6583 if (err != -NFS4ERR_DELAY)
6584 break;
6585 nfs4_handle_exception(server, err, &exception);
9aeda35f
BS		 6586 } while (exception.retry);
6587 return err;
6588}
36281caa
TM		 6589
6590static bool nfs41_match_stateid(const nfs4_stateid *s1,
6591 const nfs4_stateid *s2)
6592{
2d2f24ad 6593 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 6594 return false;
6595
2d2f24ad 6596 if (s1->seqid == s2->seqid)
36281caa 6597 return true;
2d2f24ad 6598 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 6599 return true;
6600
6601 return false;
6602}
6603
557134a3
AA		 6604#endif /* CONFIG_NFS_V4_1 */
6605
36281caa
TM		 6606static bool nfs4_match_stateid(const nfs4_stateid *s1,
6607 const nfs4_stateid *s2)
6608{
f597c537 6609 return nfs4_stateid_match(s1, s2);
36281caa
TM		 6610}
6611
6612
17280175 6613static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 6614 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 6615 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 6616 .recover_open = nfs4_open_reclaim,
6617 .recover_lock = nfs4_lock_reclaim,
591d71cb 6618 .establish_clid = nfs4_init_clientid,
90a16617 6619 .get_clid_cred = nfs4_get_setclientid_cred,
05f4c350 6620 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 6621};
6622
591d71cb 6623#if defined(CONFIG_NFS_V4_1)
17280175 6624static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 6625 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
6626 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
6627 .recover_open = nfs4_open_reclaim,
6628 .recover_lock = nfs4_lock_reclaim,
4d643d1d 6629 .establish_clid = nfs41_init_clientid,
b4b82607 6630 .get_clid_cred = nfs4_get_exchange_id_cred,
fce5c838 6631 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 6632 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 6633};
6634#endif /* CONFIG_NFS_V4_1 */
6635
17280175 6636static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 6637 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
6638 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
6639 .recover_open = nfs4_open_expired,
6640 .recover_lock = nfs4_lock_expired,
6641 .establish_clid = nfs4_init_clientid,
90a16617 6642 .get_clid_cred = nfs4_get_setclientid_cred,
591d71cb
AA		 6643};
6644
6645#if defined(CONFIG_NFS_V4_1)
17280175 6646static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 6647 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 6648 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 6649 .recover_open = nfs41_open_expired,
6650 .recover_lock = nfs41_lock_expired,
4d643d1d 6651 .establish_clid = nfs41_init_clientid,
b4b82607 6652 .get_clid_cred = nfs4_get_exchange_id_cred,
1da177e4 6653};
591d71cb 6654#endif /* CONFIG_NFS_V4_1 */
1da177e4 6655
17280175 6656static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 6657 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 6658 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 6659 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 6660};
6661
6662#if defined(CONFIG_NFS_V4_1)
17280175 6663static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 6664 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 6665 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 6666 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 6667};
6668#endif
6669
97dc1359
TM		 6670static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
6671 .minor_version = 0,
6672 .call_sync = _nfs4_call_sync,
36281caa 6673 .match_stateid = nfs4_match_stateid,
fca78d6d 6674 .find_root_sec = nfs4_find_root_sec,
c48f4f35
TM		 6675 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
6676 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
6677 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 6678};
6679
6680#if defined(CONFIG_NFS_V4_1)
6681static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
6682 .minor_version = 1,
104287cd 6683 .call_sync = nfs4_call_sync_sequence,
36281caa 6684 .match_stateid = nfs41_match_stateid,
fca78d6d 6685 .find_root_sec = nfs41_find_root_sec,
c48f4f35
TM		 6686 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
6687 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
6688 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 6689};
6690#endif
6691
97dc1359
TM		 6692const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
6693 [0] = &nfs_v4_0_minor_ops,
6694#if defined(CONFIG_NFS_V4_1)
6695 [1] = &nfs_v4_1_minor_ops,
6696#endif
6697};
6698
73a79706
BS		 6699const struct inode_operations nfs4_dir_inode_operations = {
6700 .create = nfs_create,
6701 .lookup = nfs_lookup,
6702 .atomic_open = nfs_atomic_open,
6703 .link = nfs_link,
6704 .unlink = nfs_unlink,
6705 .symlink = nfs_symlink,
6706 .mkdir = nfs_mkdir,
6707 .rmdir = nfs_rmdir,
6708 .mknod = nfs_mknod,
6709 .rename = nfs_rename,
6710 .permission = nfs_permission,
6711 .getattr = nfs_getattr,
6712 .setattr = nfs_setattr,
6713 .getxattr = generic_getxattr,
6714 .setxattr = generic_setxattr,
6715 .listxattr = generic_listxattr,
6716 .removexattr = generic_removexattr,
6717};
6718
92e1d5be 6719static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 6720 .permission = nfs_permission,
6721 .getattr = nfs_getattr,
6722 .setattr = nfs_setattr,
64c2ce8b
AK		 6723 .getxattr = generic_getxattr,
6724 .setxattr = generic_setxattr,
6725 .listxattr = generic_listxattr,
6726 .removexattr = generic_removexattr,
6b3b5496
BF		 6727};
6728
509de811 6729const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 6730 .version = 4, /* protocol version */
6731 .dentry_ops = &nfs4_dentry_operations,
6732 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 6733 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 6734 .file_ops = &nfs4_file_operations,
1da177e4 6735 .getroot = nfs4_proc_get_root,
281cad46 6736 .submount = nfs4_submount,
ff9099f2 6737 .try_mount = nfs4_try_mount,
1da177e4
LT		 6738 .getattr = nfs4_proc_getattr,
6739 .setattr = nfs4_proc_setattr,
6740 .lookup = nfs4_proc_lookup,
6741 .access = nfs4_proc_access,
6742 .readlink = nfs4_proc_readlink,
1da177e4
LT		 6743 .create = nfs4_proc_create,
6744 .remove = nfs4_proc_remove,
6745 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 6746 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 6747 .unlink_done = nfs4_proc_unlink_done,
6748 .rename = nfs4_proc_rename,
d3d4152a 6749 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 6750 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 6751 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 6752 .link = nfs4_proc_link,
6753 .symlink = nfs4_proc_symlink,
6754 .mkdir = nfs4_proc_mkdir,
6755 .rmdir = nfs4_proc_remove,
6756 .readdir = nfs4_proc_readdir,
6757 .mknod = nfs4_proc_mknod,
6758 .statfs = nfs4_proc_statfs,
6759 .fsinfo = nfs4_proc_fsinfo,
6760 .pathconf = nfs4_proc_pathconf,
e9326dca 6761 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 6762 .decode_dirent = nfs4_decode_dirent,
6763 .read_setup = nfs4_proc_read_setup,
1abb5088 6764 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 6765 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 6766 .read_done = nfs4_read_done,
1da177e4 6767 .write_setup = nfs4_proc_write_setup,
57208fa7 6768 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 6769 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 6770 .write_done = nfs4_write_done,
1da177e4 6771 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 6772 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 6773 .commit_done = nfs4_commit_done,
1da177e4 6774 .lock = nfs4_proc_lock,
e50a1c2e 6775 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 6776 .close_context = nfs4_close_context,
2b484297 6777 .open_context = nfs4_atomic_open,
011e2a7f 6778 .have_delegation = nfs4_have_delegation,
57ec14c5 6779 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 6780 .alloc_client = nfs4_alloc_client,
45a52a02 6781 .init_client = nfs4_init_client,
cdb7eced 6782 .free_client = nfs4_free_client,
1179acc6
BS		 6783 .create_server = nfs4_create_server,
6784 .clone_server = nfs_clone_server,
1da177e4
LT		 6785};
6786
64c2ce8b
AK		 6787static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
6788 .prefix = XATTR_NAME_NFSV4_ACL,
6789 .list = nfs4_xattr_list_nfs4_acl,
6790 .get = nfs4_xattr_get_nfs4_acl,
6791 .set = nfs4_xattr_set_nfs4_acl,
6792};
6793
6794const struct xattr_handler *nfs4_xattr_handlers[] = {
6795 &nfs4_xattr_nfs4_acl_handler,
6796 NULL
6797};
6798
1da177e4
LT		 6799/*
6800 * Local variables:
6801 * c-basic-offset: 8
6802 * End:
6803 */
Linux kernel - Deliverables
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