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NFSv4.1: nfs41_clear_delegation_stateid shouldn't trust NFS_DELEGATED_STATE
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4 68
c6d01c6f
TM		 69#include "nfs4trace.h"
70
1da177e4
LT		 71#define NFSDBG_FACILITY NFSDBG_PROC
72
2066fe89 73#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 74#define NFS4_POLL_RETRY_MAX (15*HZ)
75
cdd4e68b 76struct nfs4_opendata;
864472e9 77static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 78static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 79static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
8478eaa1 80static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *, long *);
81934ddb 81static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 82static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
83static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 84static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 86 struct nfs4_state *state, struct nfs4_label *ilabel,
87 struct nfs4_label *olabel);
f062eb6c 88#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 89static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
90 struct rpc_cred *);
91static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
92 struct rpc_cred *);
f062eb6c 93#endif
aa9c2669
DQ		 94
95#ifdef CONFIG_NFS_V4_SECURITY_LABEL
96static inline struct nfs4_label *
97nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
98 struct iattr *sattr, struct nfs4_label *label)
99{
100 int err;
101
102 if (label == NULL)
103 return NULL;
104
105 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
106 return NULL;
107
aa9c2669
DQ		 108 err = security_dentry_init_security(dentry, sattr->ia_mode,
109 &dentry->d_name, (void **)&label->label, &label->len);
110 if (err == 0)
111 return label;
112
113 return NULL;
114}
115static inline void
116nfs4_label_release_security(struct nfs4_label *label)
117{
118 if (label)
119 security_release_secctx(label->label, label->len);
120}
121static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
122{
123 if (label)
124 return server->attr_bitmask;
125
126 return server->attr_bitmask_nl;
127}
128#else
129static inline struct nfs4_label *
130nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
131 struct iattr *sattr, struct nfs4_label *l)
132{ return NULL; }
133static inline void
134nfs4_label_release_security(struct nfs4_label *label)
135{ return; }
136static inline u32 *
137nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
138{ return server->attr_bitmask; }
139#endif
140
1da177e4 141/* Prevent leaks of NFSv4 errors into userland */
46f72f57 142static int nfs4_map_errors(int err)
1da177e4 143{
52567b03
TM		 144 if (err >= -1000)
145 return err;
146 switch (err) {
147 case -NFS4ERR_RESOURCE:
30005121
WAA		 148 case -NFS4ERR_LAYOUTTRYLATER:
149 case -NFS4ERR_RECALLCONFLICT:
52567b03 150 return -EREMOTEIO;
7ebb9315 151 case -NFS4ERR_WRONGSEC:
8897538e 152 case -NFS4ERR_WRONG_CRED:
7ebb9315 153 return -EPERM;
3ddeb7c5
TM		 154 case -NFS4ERR_BADOWNER:
155 case -NFS4ERR_BADNAME:
156 return -EINVAL;
fb13bfa7
TM		 157 case -NFS4ERR_SHARE_DENIED:
158 return -EACCES;
f25efd85
SD		 159 case -NFS4ERR_MINOR_VERS_MISMATCH:
160 return -EPROTONOSUPPORT;
6168f62c
WAA		 161 case -NFS4ERR_ACCESS:
162 return -EACCES;
6e3cf241
TM		 163 case -NFS4ERR_FILE_OPEN:
164 return -EBUSY;
52567b03 165 default:
1da177e4 166 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 167 __func__, -err);
52567b03 168 break;
1da177e4 169 }
52567b03 170 return -EIO;
1da177e4
LT		 171}
172
173/*
174 * This is our standard bitmap for GETATTR requests.
175 */
1549210f 176const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 177 FATTR4_WORD0_TYPE
178 | FATTR4_WORD0_CHANGE
179 | FATTR4_WORD0_SIZE
180 | FATTR4_WORD0_FSID
181 | FATTR4_WORD0_FILEID,
182 FATTR4_WORD1_MODE
183 | FATTR4_WORD1_NUMLINKS
184 | FATTR4_WORD1_OWNER
185 | FATTR4_WORD1_OWNER_GROUP
186 | FATTR4_WORD1_RAWDEV
187 | FATTR4_WORD1_SPACE_USED
188 | FATTR4_WORD1_TIME_ACCESS
189 | FATTR4_WORD1_TIME_METADATA
aa9c2669
DQ		 190 | FATTR4_WORD1_TIME_MODIFY,
191#ifdef CONFIG_NFS_V4_SECURITY_LABEL
192 FATTR4_WORD2_SECURITY_LABEL
193#endif
1da177e4
LT		 194};
195
1549210f
TM		 196static const u32 nfs4_pnfs_open_bitmap[3] = {
197 FATTR4_WORD0_TYPE
198 | FATTR4_WORD0_CHANGE
199 | FATTR4_WORD0_SIZE
200 | FATTR4_WORD0_FSID
201 | FATTR4_WORD0_FILEID,
202 FATTR4_WORD1_MODE
203 | FATTR4_WORD1_NUMLINKS
204 | FATTR4_WORD1_OWNER
205 | FATTR4_WORD1_OWNER_GROUP
206 | FATTR4_WORD1_RAWDEV
207 | FATTR4_WORD1_SPACE_USED
208 | FATTR4_WORD1_TIME_ACCESS
209 | FATTR4_WORD1_TIME_METADATA
210 | FATTR4_WORD1_TIME_MODIFY,
211 FATTR4_WORD2_MDSTHRESHOLD
212};
213
e23008ec
AA		 214static const u32 nfs4_open_noattr_bitmap[3] = {
215 FATTR4_WORD0_TYPE
216 | FATTR4_WORD0_CHANGE
217 | FATTR4_WORD0_FILEID,
218};
219
a09df2ca 220const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 221 FATTR4_WORD0_FILES_AVAIL
222 | FATTR4_WORD0_FILES_FREE
223 | FATTR4_WORD0_FILES_TOTAL,
224 FATTR4_WORD1_SPACE_AVAIL
225 | FATTR4_WORD1_SPACE_FREE
226 | FATTR4_WORD1_SPACE_TOTAL
227};
228
a09df2ca 229const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 230 FATTR4_WORD0_MAXLINK
231 | FATTR4_WORD0_MAXNAME,
232 0
233};
234
dae100c2 235const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 236 | FATTR4_WORD0_MAXREAD
237 | FATTR4_WORD0_MAXWRITE
238 | FATTR4_WORD0_LEASE_TIME,
55b6e774 239 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 240 | FATTR4_WORD1_FS_LAYOUT_TYPES,
241 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 242};
243
a09df2ca 244const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 245 FATTR4_WORD0_TYPE
246 | FATTR4_WORD0_CHANGE
247 | FATTR4_WORD0_SIZE
248 | FATTR4_WORD0_FSID
249 | FATTR4_WORD0_FILEID
250 | FATTR4_WORD0_FS_LOCATIONS,
251 FATTR4_WORD1_MODE
252 | FATTR4_WORD1_NUMLINKS
253 | FATTR4_WORD1_OWNER
254 | FATTR4_WORD1_OWNER_GROUP
255 | FATTR4_WORD1_RAWDEV
256 | FATTR4_WORD1_SPACE_USED
257 | FATTR4_WORD1_TIME_ACCESS
258 | FATTR4_WORD1_TIME_METADATA
259 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 260 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 261};
262
bc4785cd 263static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 264 struct nfs4_readdir_arg *readdir)
265{
0dbb4c67 266 __be32 *start, *p;
1da177e4 267
1da177e4 268 if (cookie > 2) {
b7ef1956 269 readdir->cookie = cookie;
1da177e4
LT		 270 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
271 return;
272 }
273
274 readdir->cookie = 0;
275 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
276 if (cookie == 2)
277 return;
278
279 /*
280 * NFSv4 servers do not return entries for '.' and '..'
281 * Therefore, we fake these entries here. We let '.'
282 * have cookie 0 and '..' have cookie 1. Note that
283 * when talking to the server, we always send cookie 0
284 * instead of 1 or 2.
285 */
2b86ce2d 286 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 287
288 if (cookie == 0) {
289 *p++ = xdr_one; /* next */
290 *p++ = xdr_zero; /* cookie, first word */
291 *p++ = xdr_one; /* cookie, second word */
292 *p++ = xdr_one; /* entry len */
293 memcpy(p, ".\0\0\0", 4); /* entry */
294 p++;
295 *p++ = xdr_one; /* bitmap length */
296 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
297 *p++ = htonl(8); /* attribute buffer length */
4e769b93 298 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 299 }
300
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_two; /* cookie, second word */
304 *p++ = xdr_two; /* entry len */
305 memcpy(p, "..\0\0", 4); /* entry */
306 p++;
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
4e769b93 310 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 311
312 readdir->pgbase = (char *)p - (char *)start;
313 readdir->count -= readdir->pgbase;
2b86ce2d 314 kunmap_atomic(start);
1da177e4
LT		 315}
316
8478eaa1
N		 317static long nfs4_update_delay(long *timeout)
318{
319 long ret;
320 if (!timeout)
321 return NFS4_POLL_RETRY_MAX;
322 if (*timeout <= 0)
323 *timeout = NFS4_POLL_RETRY_MIN;
324 if (*timeout > NFS4_POLL_RETRY_MAX)
325 *timeout = NFS4_POLL_RETRY_MAX;
326 ret = *timeout;
327 *timeout <<= 1;
328 return ret;
329}
330
65de872e
TM		 331static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
332{
333 int res = 0;
334
335 might_sleep();
336
8478eaa1
N		 337 freezable_schedule_timeout_killable_unsafe(
338 nfs4_update_delay(timeout));
65de872e
TM		 339 if (fatal_signal_pending(current))
340 res = -ERESTARTSYS;
65de872e
TM		 341 return res;
342}
343
344/* This is the error handling routine for processes that are allowed
345 * to sleep.
346 */
b064eca2 347static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 348{
349 struct nfs_client *clp = server->nfs_client;
9e33bed5 350 struct nfs4_state *state = exception->state;
3114ea7a 351 struct inode *inode = exception->inode;
65de872e
TM		 352 int ret = errorcode;
353
354 exception->retry = 0;
355 switch(errorcode) {
356 case 0:
357 return 0;
3114ea7a 358 case -NFS4ERR_OPENMODE:
011e2a7f 359 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 360 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 361 exception->retry = 1;
362 return 0;
363 }
364 if (state == NULL)
365 break;
5d422301
TM		 366 ret = nfs4_schedule_stateid_recovery(server, state);
367 if (ret < 0)
368 break;
3114ea7a 369 goto wait_on_recovery;
a1d0b5ee 370 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 371 case -NFS4ERR_ADMIN_REVOKED:
372 case -NFS4ERR_BAD_STATEID:
b570a975
TM		 373 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
374 nfs_remove_bad_delegation(inode);
375 exception->retry = 1;
376 break;
377 }
9e33bed5
TM		 378 if (state == NULL)
379 break;
5d422301
TM		 380 ret = nfs4_schedule_stateid_recovery(server, state);
381 if (ret < 0)
382 break;
0400a6b0 383 goto wait_on_recovery;
0ced63d1 384 case -NFS4ERR_EXPIRED:
5d422301
TM		 385 if (state != NULL) {
386 ret = nfs4_schedule_stateid_recovery(server, state);
387 if (ret < 0)
388 break;
389 }
65de872e 390 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 391 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 392 nfs4_schedule_lease_recovery(clp);
393 goto wait_on_recovery;
519ae255
CL		 394 case -NFS4ERR_MOVED:
395 ret = nfs4_schedule_migration_recovery(server);
396 if (ret < 0)
397 break;
398 goto wait_on_recovery;
8ef2f8d4
CL		 399 case -NFS4ERR_LEASE_MOVED:
400 nfs4_schedule_lease_moved_recovery(clp);
401 goto wait_on_recovery;
03391693 402#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 403 case -NFS4ERR_BADSESSION:
404 case -NFS4ERR_BADSLOT:
405 case -NFS4ERR_BAD_HIGH_SLOT:
406 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
407 case -NFS4ERR_DEADSESSION:
408 case -NFS4ERR_SEQ_FALSE_RETRY:
409 case -NFS4ERR_SEQ_MISORDERED:
410 dprintk("%s ERROR: %d Reset session\n", __func__,
411 errorcode);
9f594791 412 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 413 goto wait_on_recovery;
03391693 414#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 415 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 416 if (exception->timeout > HZ) {
417 /* We have retried a decent amount, time to
418 * fail
419 */
420 ret = -EBUSY;
421 break;
422 }
65de872e
TM		 423 case -NFS4ERR_GRACE:
424 case -NFS4ERR_DELAY:
425 ret = nfs4_delay(server->client, &exception->timeout);
426 if (ret != 0)
427 break;
a8a4ae3a 428 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 429 case -NFS4ERR_OLD_STATEID:
430 exception->retry = 1;
b064eca2
TM		 431 break;
432 case -NFS4ERR_BADOWNER:
433 /* The following works around a Linux server bug! */
434 case -NFS4ERR_BADNAME:
435 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
436 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
437 exception->retry = 1;
438 printk(KERN_WARNING "NFS: v4 server %s "
439 "does not accept raw "
440 "uid/gids. "
441 "Reenabling the idmapper.\n",
442 server->nfs_client->cl_hostname);
443 }
65de872e
TM		 444 }
445 /* We failed to handle the error */
446 return nfs4_map_errors(ret);
0400a6b0 447wait_on_recovery:
a2c0b9e2 448 ret = nfs4_wait_clnt_recover(clp);
519ae255
CL		 449 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
450 return -EIO;
a2c0b9e2
TM		 451 if (ret == 0)
452 exception->retry = 1;
453 return ret;
65de872e
TM		 454}
455
a5250def
WAA		 456/*
457 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
458 * or 'false' otherwise.
459 */
460static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
461{
462 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
463
464 if (flavor == RPC_AUTH_GSS_KRB5I ||
465 flavor == RPC_AUTH_GSS_KRB5P)
466 return true;
467
468 return false;
469}
65de872e 470
452e9352 471static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 472{
1da177e4
LT		 473 spin_lock(&clp->cl_lock);
474 if (time_before(clp->cl_last_renewal,timestamp))
475 clp->cl_last_renewal = timestamp;
476 spin_unlock(&clp->cl_lock);
477}
478
452e9352
TM		 479static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
480{
481 do_renew_lease(server->nfs_client, timestamp);
482}
483
2a3eb2b9
CL		 484struct nfs4_call_sync_data {
485 const struct nfs_server *seq_server;
486 struct nfs4_sequence_args *seq_args;
487 struct nfs4_sequence_res *seq_res;
488};
489
a9c92d6b
CL		 490static void nfs4_init_sequence(struct nfs4_sequence_args *args,
491 struct nfs4_sequence_res *res, int cache_reply)
492{
493 args->sa_slot = NULL;
494 args->sa_cache_this = cache_reply;
495 args->sa_privileged = 0;
496
497 res->sr_slot = NULL;
498}
499
500static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
501{
502 args->sa_privileged = 1;
503}
504
3bd2384a
CL		 505static int nfs40_setup_sequence(const struct nfs_server *server,
506 struct nfs4_sequence_args *args,
507 struct nfs4_sequence_res *res,
508 struct rpc_task *task)
509{
510 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
511 struct nfs4_slot *slot;
512
513 /* slot already allocated? */
514 if (res->sr_slot != NULL)
515 goto out_start;
516
517 spin_lock(&tbl->slot_tbl_lock);
518 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
519 goto out_sleep;
520
521 slot = nfs4_alloc_slot(tbl);
522 if (IS_ERR(slot)) {
523 if (slot == ERR_PTR(-ENOMEM))
524 task->tk_timeout = HZ >> 2;
525 goto out_sleep;
526 }
527 spin_unlock(&tbl->slot_tbl_lock);
528
529 args->sa_slot = slot;
530 res->sr_slot = slot;
531
532out_start:
533 rpc_call_start(task);
534 return 0;
535
536out_sleep:
537 if (args->sa_privileged)
538 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
539 NULL, RPC_PRIORITY_PRIVILEGED);
540 else
541 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
542 spin_unlock(&tbl->slot_tbl_lock);
543 return -EAGAIN;
544}
545
546static int nfs40_sequence_done(struct rpc_task *task,
547 struct nfs4_sequence_res *res)
548{
549 struct nfs4_slot *slot = res->sr_slot;
550 struct nfs4_slot_table *tbl;
551
cab92c19 552 if (slot == NULL)
3bd2384a
CL		 553 goto out;
554
555 tbl = slot->table;
556 spin_lock(&tbl->slot_tbl_lock);
557 if (!nfs41_wake_and_assign_slot(tbl, slot))
558 nfs4_free_slot(tbl, slot);
559 spin_unlock(&tbl->slot_tbl_lock);
560
561 res->sr_slot = NULL;
562out:
563 return 1;
564}
565
cccef3b9
AA		 566#if defined(CONFIG_NFS_V4_1)
567
d185a334 568static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 569{
e3725ec0 570 struct nfs4_session *session;
13615871 571 struct nfs4_slot_table *tbl;
a13ce7c6 572 struct nfs4_slot *slot = res->sr_slot;
c10e4498 573 bool send_new_highest_used_slotid = false;
13615871 574
a13ce7c6 575 tbl = slot->table;
e3725ec0 576 session = tbl->session;
ea028ac9 577
35dc1d74 578 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 579 /* Be nice to the server: try to ensure that the last transmitted
580 * value for highest_user_slotid <= target_highest_slotid
581 */
582 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
583 send_new_highest_used_slotid = true;
584
a13ce7c6 585 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 586 send_new_highest_used_slotid = false;
587 goto out_unlock;
588 }
a13ce7c6 589 nfs4_free_slot(tbl, slot);
c10e4498
TM		 590
591 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
592 send_new_highest_used_slotid = false;
b75ad4cd 593out_unlock:
35dc1d74 594 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 595 res->sr_slot = NULL;
c10e4498
TM		 596 if (send_new_highest_used_slotid)
597 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 598}
599
f9c96fcc 600int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 601{
e3725ec0 602 struct nfs4_session *session;
a13ce7c6 603 struct nfs4_slot *slot = res->sr_slot;
14516c3a 604 struct nfs_client *clp;
ac20d163 605 bool interrupted = false;
85563073 606 int ret = 1;
b0df806c 607
a13ce7c6
TM		 608 if (slot == NULL)
609 goto out_noaction;
468f8613
BS		 610 /* don't increment the sequence number if the task wasn't sent */
611 if (!RPC_WAS_SENT(task))
b0df806c
AA		 612 goto out;
613
e3725ec0 614 session = slot->table->session;
933602e3 615
ac20d163
TM		 616 if (slot->interrupted) {
617 slot->interrupted = 0;
618 interrupted = true;
619 }
620
2f92ae34 621 trace_nfs4_sequence_done(session, res);
691daf3b 622 /* Check the SEQUENCE operation status */
14516c3a
TM		 623 switch (res->sr_status) {
624 case 0:
b0df806c 625 /* Update the slot's sequence and clientid lease timer */
933602e3 626 ++slot->seq_nr;
e3725ec0 627 clp = session->clp;
8e63b6a8 628 do_renew_lease(clp, res->sr_timestamp);
0629e370 629 /* Check sequence flags */
b4410c2f
TM		 630 if (res->sr_status_flags != 0)
631 nfs4_schedule_lease_recovery(clp);
464ee9f9 632 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 633 break;
ac20d163
TM		 634 case 1:
635 /*
636 * sr_status remains 1 if an RPC level error occurred.
637 * The server may or may not have processed the sequence
638 * operation..
639 * Mark the slot as having hosted an interrupted RPC call.
640 */
641 slot->interrupted = 1;
642 goto out;
14516c3a
TM		 643 case -NFS4ERR_DELAY:
644 /* The server detected a resend of the RPC call and
645 * returned NFS4ERR_DELAY as per Section 2.10.6.2
646 * of RFC5661.
647 */
df2fabff 648 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 649 __func__,
df2fabff 650 slot->slot_nr,
933602e3 651 slot->seq_nr);
14516c3a 652 goto out_retry;
85563073
TM		 653 case -NFS4ERR_BADSLOT:
654 /*
655 * The slot id we used was probably retired. Try again
656 * using a different slot id.
657 */
e8794440
TM		 658 goto retry_nowait;
659 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 660 /*
661 * Was the last operation on this sequence interrupted?
662 * If so, retry after bumping the sequence number.
663 */
664 if (interrupted) {
665 ++slot->seq_nr;
666 goto retry_nowait;
667 }
e8794440
TM		 668 /*
669 * Could this slot have been previously retired?
670 * If so, then the server may be expecting seq_nr = 1!
671 */
8e63b6a8
TM		 672 if (slot->seq_nr != 1) {
673 slot->seq_nr = 1;
674 goto retry_nowait;
675 }
676 break;
e8794440
TM		 677 case -NFS4ERR_SEQ_FALSE_RETRY:
678 ++slot->seq_nr;
679 goto retry_nowait;
14516c3a
TM		 680 default:
681 /* Just update the slot sequence no. */
933602e3 682 ++slot->seq_nr;
b0df806c
AA		 683 }
684out:
685 /* The session may be reset by one of the error handlers. */
686 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 687 nfs41_sequence_free_slot(res);
a13ce7c6 688out_noaction:
85563073 689 return ret;
e8794440
TM		 690retry_nowait:
691 if (rpc_restart_call_prepare(task)) {
692 task->tk_status = 0;
693 ret = 0;
694 }
695 goto out;
14516c3a 696out_retry:
d05dd4e9 697 if (!rpc_restart_call(task))
14516c3a
TM		 698 goto out;
699 rpc_delay(task, NFS4_POLL_RETRY_MAX);
700 return 0;
b0df806c 701}
f9c96fcc 702EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 703
14516c3a
TM		 704static int nfs4_sequence_done(struct rpc_task *task,
705 struct nfs4_sequence_res *res)
df896455 706{
e3725ec0 707 if (res->sr_slot == NULL)
14516c3a 708 return 1;
3bd2384a
CL		 709 if (!res->sr_slot->table->session)
710 return nfs40_sequence_done(task, res);
14516c3a 711 return nfs41_sequence_done(task, res);
df896455
TM		 712}
713
dc70d7b3 714int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 715 struct nfs4_sequence_args *args,
716 struct nfs4_sequence_res *res,
ce5039c1
AA		 717 struct rpc_task *task)
718{
fbcd4abc
AA		 719 struct nfs4_slot *slot;
720 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 721
722 dprintk("--> %s\n", __func__);
ce5039c1 723 /* slot already allocated? */
dfb4f309 724 if (res->sr_slot != NULL)
d9afbd1b 725 goto out_success;
ce5039c1 726
fbcd4abc
AA		 727 tbl = &session->fc_slot_table;
728
69d206b5
TM		 729 task->tk_timeout = 0;
730
fbcd4abc 731 spin_lock(&tbl->slot_tbl_lock);
774d5f14 732 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 733 !args->sa_privileged) {
0b1c8fc4 734 /* The state manager will wait until the slot table is empty */
0b1c8fc4 735 dprintk("%s session is draining\n", __func__);
7b939a3f 736 goto out_sleep;
689cf5c1
AB		 737 }
738
2dc03b7f 739 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 740 if (IS_ERR(slot)) {
741 /* If out of memory, try again in 1/4 second */
742 if (slot == ERR_PTR(-ENOMEM))
743 task->tk_timeout = HZ >> 2;
fbcd4abc 744 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 745 goto out_sleep;
fbcd4abc
AA		 746 }
747 spin_unlock(&tbl->slot_tbl_lock);
748
2b2fa717 749 args->sa_slot = slot;
fbcd4abc 750
e8d92382 751 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 752 slot->slot_nr, slot->seq_nr);
fbcd4abc 753
dfb4f309 754 res->sr_slot = slot;
8e63b6a8 755 res->sr_timestamp = jiffies;
2a6e26cd 756 res->sr_status_flags = 0;
fbcd4abc
AA		 757 /*
758 * sr_status is only set in decode_sequence, and so will remain
759 * set to 1 if an rpc level failure occurs.
760 */
761 res->sr_status = 1;
2f92ae34 762 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 763out_success:
764 rpc_call_start(task);
ce5039c1 765 return 0;
7b939a3f 766out_sleep:
8fe72bac
TM		 767 /* Privileged tasks are queued with top priority */
768 if (args->sa_privileged)
1e1093c7
TM		 769 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
770 NULL, RPC_PRIORITY_PRIVILEGED);
771 else
772 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 773 spin_unlock(&tbl->slot_tbl_lock);
774 return -EAGAIN;
ce5039c1 775}
dc70d7b3 776EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 777
5a580e0a
CL		 778static int nfs4_setup_sequence(const struct nfs_server *server,
779 struct nfs4_sequence_args *args,
780 struct nfs4_sequence_res *res,
781 struct rpc_task *task)
ce5039c1 782{
035168ab 783 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 784 int ret = 0;
785
3bd2384a
CL		 786 if (!session)
787 return nfs40_setup_sequence(server, args, res, task);
035168ab 788
e8d92382 789 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 790 __func__, session->clp, session, res->sr_slot ?
e8d92382 791 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 792
9d12b216 793 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 794
ce5039c1
AA		 795 dprintk("<-- %s status=%d\n", __func__, ret);
796 return ret;
797}
798
ce5039c1
AA		 799static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
800{
2a3eb2b9 801 struct nfs4_call_sync_data *data = calldata;
6ba7db34 802 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 803
035168ab
TM		 804 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
805
d9afbd1b 806 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 807}
808
69ab40c4
AA		 809static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
810{
2a3eb2b9 811 struct nfs4_call_sync_data *data = calldata;
69ab40c4 812
14516c3a 813 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 814}
815
17280175 816static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 817 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 818 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 819};
820
3bd2384a
CL		 821#else /* !CONFIG_NFS_V4_1 */
822
9915ea7e
CL		 823static int nfs4_setup_sequence(const struct nfs_server *server,
824 struct nfs4_sequence_args *args,
825 struct nfs4_sequence_res *res,
826 struct rpc_task *task)
827{
3bd2384a 828 return nfs40_setup_sequence(server, args, res, task);
9915ea7e
CL		 829}
830
831static int nfs4_sequence_done(struct rpc_task *task,
832 struct nfs4_sequence_res *res)
833{
3bd2384a 834 return nfs40_sequence_done(task, res);
9915ea7e 835}
3bd2384a
CL		 836
837#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 838
839static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
840{
841 struct nfs4_call_sync_data *data = calldata;
842 nfs4_setup_sequence(data->seq_server,
843 data->seq_args, data->seq_res, task);
844}
845
846static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
847{
848 struct nfs4_call_sync_data *data = calldata;
849 nfs4_sequence_done(task, data->seq_res);
850}
851
852static const struct rpc_call_ops nfs40_call_sync_ops = {
853 .rpc_call_prepare = nfs40_call_sync_prepare,
854 .rpc_call_done = nfs40_call_sync_done,
855};
856
7c513058
BS		 857static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
858 struct nfs_server *server,
ce5039c1
AA		 859 struct rpc_message *msg,
860 struct nfs4_sequence_args *args,
8fe72bac 861 struct nfs4_sequence_res *res)
ce5039c1
AA		 862{
863 int ret;
864 struct rpc_task *task;
9915ea7e 865 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 866 struct nfs4_call_sync_data data = {
035168ab 867 .seq_server = server,
ce5039c1
AA		 868 .seq_args = args,
869 .seq_res = res,
ce5039c1
AA		 870 };
871 struct rpc_task_setup task_setup = {
7c513058 872 .rpc_client = clnt,
ce5039c1 873 .rpc_message = msg,
9915ea7e 874 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 875 .callback_data = &data
876 };
877
ce5039c1
AA		 878 task = rpc_run_task(&task_setup);
879 if (IS_ERR(task))
880 ret = PTR_ERR(task);
881 else {
882 ret = task->tk_status;
883 rpc_put_task(task);
884 }
885 return ret;
886}
887
7c513058
BS		 888int nfs4_call_sync(struct rpc_clnt *clnt,
889 struct nfs_server *server,
e73b83f2
BS		 890 struct rpc_message *msg,
891 struct nfs4_sequence_args *args,
892 struct nfs4_sequence_res *res,
893 int cache_reply)
894{
a9c92d6b 895 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 896 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 897}
cccef3b9 898
38478b24 899static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 900{
38478b24 901 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 902
38478b24 903 spin_lock(&dir->i_lock);
359d7d1c 904 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 905 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 906 nfs_force_lookup_revalidate(dir);
a9a4a87a 907 dir->i_version = cinfo->after;
de242c0b 908 nfs_fscache_invalidate(dir);
38478b24 909 spin_unlock(&dir->i_lock);
1da177e4
LT		 910}
911
e56e0b78 912struct nfs4_opendata {
c6d00e63 913 struct kref kref;
e56e0b78
TM		 914 struct nfs_openargs o_arg;
915 struct nfs_openres o_res;
cdd4e68b
TM		 916 struct nfs_open_confirmargs c_arg;
917 struct nfs_open_confirmres c_res;
6926afd1
TM		 918 struct nfs4_string owner_name;
919 struct nfs4_string group_name;
e56e0b78 920 struct nfs_fattr f_attr;
1775fd3e 921 struct nfs4_label *f_label;
e56e0b78 922 struct dentry *dir;
82a2c1b7 923 struct dentry *dentry;
e56e0b78 924 struct nfs4_state_owner *owner;
aac00a8d 925 struct nfs4_state *state;
e56e0b78 926 struct iattr attrs;
26e976a8 927 unsigned long timestamp;
3e309914 928 unsigned int rpc_done : 1;
5bc2afc2 929 unsigned int file_created : 1;
bdeca1b7 930 unsigned int is_recover : 1;
24ac23ab
TM		 931 int rpc_status;
932 int cancelled;
e56e0b78
TM		 933};
934
49f9a0fa
TM		 935static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
936 int err, struct nfs4_exception *exception)
937{
938 if (err != -EINVAL)
939 return false;
940 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
941 return false;
942 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
943 exception->retry = 1;
944 return true;
945}
946
947static enum open_claim_type4
948nfs4_map_atomic_open_claim(struct nfs_server *server,
949 enum open_claim_type4 claim)
950{
951 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
952 return claim;
953 switch (claim) {
954 default:
955 return claim;
956 case NFS4_OPEN_CLAIM_FH:
957 return NFS4_OPEN_CLAIM_NULL;
958 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
959 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
960 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
961 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
962 }
963}
2ced46c2
TM		 964
965static void nfs4_init_opendata_res(struct nfs4_opendata *p)
966{
967 p->o_res.f_attr = &p->f_attr;
1775fd3e 968 p->o_res.f_label = p->f_label;
c1d51931
TM		 969 p->o_res.seqid = p->o_arg.seqid;
970 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 971 p->o_res.server = p->o_arg.server;
5f657530 972 p->o_res.access_request = p->o_arg.access;
2ced46c2 973 nfs_fattr_init(&p->f_attr);
6926afd1 974 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 975}
976
82a2c1b7 977static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 978 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 979 const struct iattr *attrs,
1775fd3e 980 struct nfs4_label *label,
4a1c0893 981 enum open_claim_type4 claim,
8535b2be 982 gfp_t gfp_mask)
e56e0b78 983{
82a2c1b7 984 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 985 struct inode *dir = parent->d_inode;
986 struct nfs_server *server = NFS_SERVER(dir);
987 struct nfs4_opendata *p;
988
8535b2be 989 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 990 if (p == NULL)
991 goto err;
14c43f76
DQ		 992
993 p->f_label = nfs4_label_alloc(server, gfp_mask);
994 if (IS_ERR(p->f_label))
995 goto err_free_p;
996
8535b2be 997 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 998 if (p->o_arg.seqid == NULL)
14c43f76 999 goto err_free_label;
82a2c1b7
AV		 1000 nfs_sb_active(dentry->d_sb);
1001 p->dentry = dget(dentry);
e56e0b78
TM		 1002 p->dir = parent;
1003 p->owner = sp;
1004 atomic_inc(&sp->so_count);
dc0b027d
TM		 1005 p->o_arg.open_flags = flags;
1006 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 1007 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1008 * will return permission denied for all bits until close */
1009 if (!(flags & O_EXCL)) {
1010 /* ask server to check for all possible rights as results
1011 * are cached */
1012 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1013 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1014 }
7539bbab 1015 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1016 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1017 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1018 p->o_arg.name = &dentry->d_name;
e56e0b78 1019 p->o_arg.server = server;
aa9c2669 1020 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1021 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1022 p->o_arg.label = label;
49f9a0fa
TM		 1023 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1024 switch (p->o_arg.claim) {
4a1c0893
TM		 1025 case NFS4_OPEN_CLAIM_NULL:
1026 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1027 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1028 p->o_arg.fh = NFS_FH(dir);
1029 break;
1030 case NFS4_OPEN_CLAIM_PREVIOUS:
1031 case NFS4_OPEN_CLAIM_FH:
1032 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1033 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1034 p->o_arg.fh = NFS_FH(dentry->d_inode);
1035 }
536e43d1 1036 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1037 __u32 verf[2];
d77d76ff 1038
e56e0b78
TM		 1039 p->o_arg.u.attrs = &p->attrs;
1040 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1041
1042 verf[0] = jiffies;
1043 verf[1] = current->pid;
1044 memcpy(p->o_arg.u.verifier.data, verf,
1045 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1046 }
cdd4e68b
TM		 1047 p->c_arg.fh = &p->o_res.fh;
1048 p->c_arg.stateid = &p->o_res.stateid;
1049 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1050 nfs4_init_opendata_res(p);
c6d00e63 1051 kref_init(&p->kref);
e56e0b78 1052 return p;
14c43f76
DQ		 1053
1054err_free_label:
1055 nfs4_label_free(p->f_label);
1056err_free_p:
e56e0b78
TM		 1057 kfree(p);
1058err:
1059 dput(parent);
1060 return NULL;
1061}
1062
c6d00e63 1063static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1064{
c6d00e63
TM		 1065 struct nfs4_opendata *p = container_of(kref,
1066 struct nfs4_opendata, kref);
82a2c1b7 1067 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1068
1069 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1070 if (p->state != NULL)
1071 nfs4_put_open_state(p->state);
c6d00e63 1072 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1073
1074 nfs4_label_free(p->f_label);
1075
c6d00e63 1076 dput(p->dir);
82a2c1b7
AV		 1077 dput(p->dentry);
1078 nfs_sb_deactive(sb);
6926afd1 1079 nfs_fattr_free_names(&p->f_attr);
e911b815 1080 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1081 kfree(p);
1082}
1083
1084static void nfs4_opendata_put(struct nfs4_opendata *p)
1085{
1086 if (p != NULL)
1087 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1088}
1089
06f814a3
TM		 1090static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1091{
06f814a3
TM		 1092 int ret;
1093
06f814a3 1094 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1095 return ret;
1096}
1097
dc0b027d 1098static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1099{
1100 int ret = 0;
dc0b027d 1101
536e43d1 1102 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1103 goto out;
1104 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1105 case FMODE_READ:
88069f77
TM		 1106 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1107 && state->n_rdonly != 0;
6ee41268
TM		 1108 break;
1109 case FMODE_WRITE:
88069f77
TM		 1110 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1111 && state->n_wronly != 0;
6ee41268
TM		 1112 break;
1113 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1114 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1115 && state->n_rdwr != 0;
6ee41268 1116 }
dc0b027d 1117out:
6ee41268
TM		 1118 return ret;
1119}
1120
dc0b027d 1121static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1122{
652f89f6
TM		 1123 if (delegation == NULL)
1124 return 0;
dc0b027d 1125 if ((delegation->type & fmode) != fmode)
aac00a8d 1126 return 0;
15c831bf 1127 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 1128 return 0;
d25be546
TM		 1129 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1130 return 0;
b7391f44 1131 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1132 return 1;
1133}
1134
dc0b027d 1135static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1136{
dc0b027d 1137 switch (fmode) {
e7616923
TM		 1138 case FMODE_WRITE:
1139 state->n_wronly++;
1140 break;
1141 case FMODE_READ:
1142 state->n_rdonly++;
1143 break;
1144 case FMODE_READ|FMODE_WRITE:
1145 state->n_rdwr++;
1146 }
dc0b027d 1147 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1148}
1149
4f14c194
TM		 1150static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1151{
1152 struct nfs_client *clp = state->owner->so_server->nfs_client;
1153 bool need_recover = false;
1154
1155 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1156 need_recover = true;
1157 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1158 need_recover = true;
1159 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1160 need_recover = true;
1161 if (need_recover)
1162 nfs4_state_mark_reclaim_nograce(clp, state);
1163}
1164
e999e80e
TM		 1165static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1166 nfs4_stateid *stateid)
1167{
1168 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1169 return true;
4f14c194
TM		 1170 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1171 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1172 return true;
4f14c194 1173 }
e999e80e
TM		 1174 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1175 return true;
1176 return false;
1177}
1178
226056c5
TM		 1179static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1180 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1181{
226056c5
TM		 1182 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1183 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1184 case FMODE_WRITE:
1185 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1186 break;
1187 case FMODE_READ:
1188 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1189 break;
1190 case 0:
1191 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1192 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1193 clear_bit(NFS_OPEN_STATE, &state->flags);
1194 }
1195 if (stateid == NULL)
1196 return;
1197 if (!nfs_need_update_open_stateid(state, stateid))
1198 return;
003707c7 1199 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1200 nfs4_stateid_copy(&state->stateid, stateid);
1201 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1202}
1203
1204static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1205{
1206 write_seqlock(&state->seqlock);
1207 nfs_clear_open_stateid_locked(state, stateid, fmode);
1208 write_sequnlock(&state->seqlock);
4f14c194
TM		 1209 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1210 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1211}
1212
dc0b027d 1213static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1214{
dc0b027d 1215 switch (fmode) {
003707c7
TM		 1216 case FMODE_READ:
1217 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1218 break;
1219 case FMODE_WRITE:
1220 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1221 break;
1222 case FMODE_READ|FMODE_WRITE:
1223 set_bit(NFS_O_RDWR_STATE, &state->flags);
1224 }
e999e80e
TM		 1225 if (!nfs_need_update_open_stateid(state, stateid))
1226 return;
1227 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1228 nfs4_stateid_copy(&state->stateid, stateid);
1229 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1230}
1231
dc0b027d 1232static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1233{
8bda4e4c
TM		 1234 /*
1235 * Protect the call to nfs4_state_set_mode_locked and
1236 * serialise the stateid update
1237 */
1238 write_seqlock(&state->seqlock);
003707c7 1239 if (deleg_stateid != NULL) {
f597c537 1240 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1241 set_bit(NFS_DELEGATED_STATE, &state->flags);
1242 }
1243 if (open_stateid != NULL)
dc0b027d 1244 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1245 write_sequnlock(&state->seqlock);
1246 spin_lock(&state->owner->so_lock);
dc0b027d 1247 update_open_stateflags(state, fmode);
ec073428 1248 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1249}
1250
dc0b027d 1251static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1252{
1253 struct nfs_inode *nfsi = NFS_I(state->inode);
1254 struct nfs_delegation *deleg_cur;
1255 int ret = 0;
1256
dc0b027d 1257 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1258
1259 rcu_read_lock();
1260 deleg_cur = rcu_dereference(nfsi->delegation);
1261 if (deleg_cur == NULL)
1262 goto no_delegation;
1263
1264 spin_lock(&deleg_cur->lock);
17f26b12 1265 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1266 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1267 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1268 goto no_delegation_unlock;
1269
1270 if (delegation == NULL)
1271 delegation = &deleg_cur->stateid;
f597c537 1272 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1273 goto no_delegation_unlock;
1274
b7391f44 1275 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1276 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1277 ret = 1;
1278no_delegation_unlock:
1279 spin_unlock(&deleg_cur->lock);
1280no_delegation:
1281 rcu_read_unlock();
1282
1283 if (!ret && open_stateid != NULL) {
dc0b027d 1284 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1285 ret = 1;
1286 }
4f14c194
TM		 1287 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1288 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1289
1290 return ret;
1291}
1292
1293
dc0b027d 1294static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1295{
1296 struct nfs_delegation *delegation;
1297
1298 rcu_read_lock();
1299 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1300 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1301 rcu_read_unlock();
1302 return;
1303 }
1304 rcu_read_unlock();
57ec14c5 1305 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1306}
1307
6ee41268 1308static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1309{
1310 struct nfs4_state *state = opendata->state;
1311 struct nfs_inode *nfsi = NFS_I(state->inode);
1312 struct nfs_delegation *delegation;
f448badd 1313 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1314 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1315 nfs4_stateid stateid;
1316 int ret = -EAGAIN;
1317
aac00a8d 1318 for (;;) {
61beef75 1319 spin_lock(&state->owner->so_lock);
dc0b027d 1320 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1321 update_open_stateflags(state, fmode);
6ee41268 1322 spin_unlock(&state->owner->so_lock);
61beef75 1323 goto out_return_state;
6ee41268 1324 }
61beef75 1325 spin_unlock(&state->owner->so_lock);
34310430
TM		 1326 rcu_read_lock();
1327 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1328 if (!can_open_delegated(delegation, fmode)) {
34310430 1329 rcu_read_unlock();
aac00a8d 1330 break;
34310430 1331 }
aac00a8d 1332 /* Save the delegation */
f597c537 1333 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1334 rcu_read_unlock();
fa332941 1335 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1336 if (!opendata->is_recover) {
1337 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1338 if (ret != 0)
1339 goto out;
1340 }
aac00a8d 1341 ret = -EAGAIN;
34310430
TM		 1342
1343 /* Try to update the stateid using the delegation */
dc0b027d 1344 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1345 goto out_return_state;
aac00a8d 1346 }
aac00a8d
TM		 1347out:
1348 return ERR_PTR(ret);
1349out_return_state:
1350 atomic_inc(&state->count);
1351 return state;
1352}
1353
e23008ec
AA		 1354static void
1355nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1356{
1357 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1358 struct nfs_delegation *delegation;
1359 int delegation_flags = 0;
1360
1361 rcu_read_lock();
1362 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1363 if (delegation)
1364 delegation_flags = delegation->flags;
1365 rcu_read_unlock();
1366 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1367 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1368 "returning a delegation for "
1369 "OPEN(CLAIM_DELEGATE_CUR)\n",
1370 clp->cl_hostname);
1371 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1372 nfs_inode_set_delegation(state->inode,
1373 data->owner->so_cred,
1374 &data->o_res);
1375 else
1376 nfs_inode_reclaim_delegation(state->inode,
1377 data->owner->so_cred,
1378 &data->o_res);
1379}
1380
1381/*
1382 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1383 * and update the nfs4_state.
1384 */
1385static struct nfs4_state *
1386_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1387{
1388 struct inode *inode = data->state->inode;
1389 struct nfs4_state *state = data->state;
1390 int ret;
1391
d2bfda2e
WAA		 1392 if (!data->rpc_done) {
1393 if (data->rpc_status) {
1394 ret = data->rpc_status;
1395 goto err;
1396 }
1397 /* cached opens have already been processed */
1398 goto update;
e23008ec
AA		 1399 }
1400
e23008ec
AA		 1401 ret = nfs_refresh_inode(inode, &data->f_attr);
1402 if (ret)
1403 goto err;
1404
1405 if (data->o_res.delegation_type != 0)
1406 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1407update:
e23008ec
AA		 1408 update_open_stateid(state, &data->o_res.stateid, NULL,
1409 data->o_arg.fmode);
d49f042a 1410 atomic_inc(&state->count);
e23008ec
AA		 1411
1412 return state;
1413err:
1414 return ERR_PTR(ret);
1415
1416}
1417
1418static struct nfs4_state *
1419_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1420{
1421 struct inode *inode;
1422 struct nfs4_state *state = NULL;
1b370bc2 1423 int ret;
24ac23ab 1424
aac00a8d 1425 if (!data->rpc_done) {
6ee41268 1426 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1427 goto out;
1428 }
1429
1b370bc2 1430 ret = -EAGAIN;
24ac23ab 1431 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1432 goto err;
1775fd3e 1433 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1434 ret = PTR_ERR(inode);
03f28e3a 1435 if (IS_ERR(inode))
1b370bc2
TM		 1436 goto err;
1437 ret = -ENOMEM;
24ac23ab
TM		 1438 state = nfs4_get_open_state(inode, data->owner);
1439 if (state == NULL)
1b370bc2 1440 goto err_put_inode;
e23008ec
AA		 1441 if (data->o_res.delegation_type != 0)
1442 nfs4_opendata_check_deleg(data, state);
34310430 1443 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1444 data->o_arg.fmode);
24ac23ab 1445 iput(inode);
aac00a8d 1446out:
7aa262b5 1447 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1448 return state;
1b370bc2
TM		 1449err_put_inode:
1450 iput(inode);
1451err:
1452 return ERR_PTR(ret);
24ac23ab
TM		 1453}
1454
e23008ec
AA		 1455static struct nfs4_state *
1456nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1457{
1458 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1459 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1460 return _nfs4_opendata_to_nfs4_state(data);
1461}
1462
864472e9
TM		 1463static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1464{
1465 struct nfs_inode *nfsi = NFS_I(state->inode);
1466 struct nfs_open_context *ctx;
1467
1468 spin_lock(&state->inode->i_lock);
1469 list_for_each_entry(ctx, &nfsi->open_files, list) {
1470 if (ctx->state != state)
1471 continue;
1472 get_nfs_open_context(ctx);
1473 spin_unlock(&state->inode->i_lock);
1474 return ctx;
1475 }
1476 spin_unlock(&state->inode->i_lock);
1477 return ERR_PTR(-ENOENT);
1478}
1479
4a1c0893
TM		 1480static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1481 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1482{
1483 struct nfs4_opendata *opendata;
1484
4a1c0893 1485 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1486 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1487 if (opendata == NULL)
1488 return ERR_PTR(-ENOMEM);
1489 opendata->state = state;
1490 atomic_inc(&state->count);
1491 return opendata;
1492}
1493
dc0b027d 1494static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1495{
2ced46c2 1496 struct nfs4_state *newstate;
864472e9
TM		 1497 int ret;
1498
dc0b027d
TM		 1499 opendata->o_arg.open_flags = 0;
1500 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1501 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1502 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1503 nfs4_init_opendata_res(opendata);
b257957e 1504 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1505 if (ret != 0)
1506 return ret;
2ced46c2 1507 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1508 if (IS_ERR(newstate))
1509 return PTR_ERR(newstate);
643168c2 1510 nfs4_close_state(newstate, fmode);
2ced46c2 1511 *res = newstate;
864472e9
TM		 1512 return 0;
1513}
1514
1515static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1516{
864472e9 1517 struct nfs4_state *newstate;
864472e9
TM		 1518 int ret;
1519
4f14c194
TM		 1520 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1521 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1522 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1523 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1524 /* memory barrier prior to reading state->n_* */
2ced46c2 1525 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1526 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1527 smp_rmb();
1528 if (state->n_rdwr != 0) {
2ced46c2 1529 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1530 if (ret != 0)
1531 return ret;
2ced46c2
TM		 1532 if (newstate != state)
1533 return -ESTALE;
864472e9
TM		 1534 }
1535 if (state->n_wronly != 0) {
2ced46c2 1536 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1537 if (ret != 0)
1538 return ret;
2ced46c2
TM		 1539 if (newstate != state)
1540 return -ESTALE;
864472e9
TM		 1541 }
1542 if (state->n_rdonly != 0) {
2ced46c2 1543 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1544 if (ret != 0)
1545 return ret;
2ced46c2
TM		 1546 if (newstate != state)
1547 return -ESTALE;
864472e9 1548 }
1ac7e2fd
TM		 1549 /*
1550 * We may have performed cached opens for all three recoveries.
1551 * Check if we need to update the current stateid.
1552 */
1553 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1554 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1555 write_seqlock(&state->seqlock);
1ac7e2fd 1556 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1557 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1558 write_sequnlock(&state->seqlock);
1ac7e2fd 1559 }
864472e9
TM		 1560 return 0;
1561}
1562
1da177e4
LT		 1563/*
1564 * OPEN_RECLAIM:
1565 * reclaim state on the server after a reboot.
1da177e4 1566 */
539cd03a 1567static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1568{
1ac7e2fd 1569 struct nfs_delegation *delegation;
864472e9 1570 struct nfs4_opendata *opendata;
dc0b027d 1571 fmode_t delegation_type = 0;
1da177e4
LT		 1572 int status;
1573
4a1c0893
TM		 1574 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1575 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1576 if (IS_ERR(opendata))
1577 return PTR_ERR(opendata);
1ac7e2fd
TM		 1578 rcu_read_lock();
1579 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1580 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1581 delegation_type = delegation->type;
1ac7e2fd 1582 rcu_read_unlock();
864472e9
TM		 1583 opendata->o_arg.u.delegation_type = delegation_type;
1584 status = nfs4_open_recover(opendata, state);
c6d00e63 1585 nfs4_opendata_put(opendata);
1da177e4
LT		 1586 return status;
1587}
1588
539cd03a 1589static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1590{
1591 struct nfs_server *server = NFS_SERVER(state->inode);
1592 struct nfs4_exception exception = { };
1593 int err;
1594 do {
539cd03a 1595 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1596 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1597 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1598 continue;
168667c4 1599 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1600 break;
1601 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1602 } while (exception.retry);
1603 return err;
1604}
1605
864472e9
TM		 1606static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1607{
1608 struct nfs_open_context *ctx;
1609 int ret;
1610
1611 ctx = nfs4_state_find_open_context(state);
1612 if (IS_ERR(ctx))
91876b13 1613 return -EAGAIN;
539cd03a 1614 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1615 put_nfs_open_context(ctx);
1616 return ret;
1617}
1618
db4f2e63 1619static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1620{
be76b5b6
TM		 1621 switch (err) {
1622 default:
1623 printk(KERN_ERR "NFS: %s: unhandled error "
1624 "%d.\n", __func__, err);
1625 case 0:
1626 case -ENOENT:
1627 case -ESTALE:
1628 break;
1629 case -NFS4ERR_BADSESSION:
1630 case -NFS4ERR_BADSLOT:
1631 case -NFS4ERR_BAD_HIGH_SLOT:
1632 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1633 case -NFS4ERR_DEADSESSION:
1634 set_bit(NFS_DELEGATED_STATE, &state->flags);
1635 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1636 return -EAGAIN;
1637 case -NFS4ERR_STALE_CLIENTID:
1638 case -NFS4ERR_STALE_STATEID:
1639 set_bit(NFS_DELEGATED_STATE, &state->flags);
1640 case -NFS4ERR_EXPIRED:
1641 /* Don't recall a delegation if it was lost */
1642 nfs4_schedule_lease_recovery(server->nfs_client);
1643 return -EAGAIN;
352297b9
CL		 1644 case -NFS4ERR_MOVED:
1645 nfs4_schedule_migration_recovery(server);
1646 return -EAGAIN;
8ef2f8d4
CL		 1647 case -NFS4ERR_LEASE_MOVED:
1648 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1649 return -EAGAIN;
be76b5b6
TM		 1650 case -NFS4ERR_DELEG_REVOKED:
1651 case -NFS4ERR_ADMIN_REVOKED:
1652 case -NFS4ERR_BAD_STATEID:
db4f2e63 1653 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1654 nfs_inode_find_state_and_recover(state->inode,
1655 stateid);
1656 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1657 return 0;
1658 case -NFS4ERR_DELAY:
1659 case -NFS4ERR_GRACE:
1660 set_bit(NFS_DELEGATED_STATE, &state->flags);
1661 ssleep(1);
1662 return -EAGAIN;
db4f2e63
TM		 1663 case -ENOMEM:
1664 case -NFS4ERR_DENIED:
1665 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1666 return 0;
be76b5b6 1667 }
1da177e4
LT		 1668 return err;
1669}
1670
db4f2e63
TM		 1671int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1672{
1673 struct nfs_server *server = NFS_SERVER(state->inode);
1674 struct nfs4_opendata *opendata;
1675 int err;
1676
1677 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1678 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1679 if (IS_ERR(opendata))
1680 return PTR_ERR(opendata);
1681 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1682 err = nfs4_open_recover(opendata, state);
1683 nfs4_opendata_put(opendata);
1684 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1685}
1686
be05c860
CL		 1687static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1688{
1689 struct nfs4_opendata *data = calldata;
1690
17ead6c8
TM		 1691 nfs40_setup_sequence(data->o_arg.server, &data->c_arg.seq_args,
1692 &data->c_res.seq_res, task);
be05c860
CL		 1693}
1694
cdd4e68b
TM		 1695static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1696{
1697 struct nfs4_opendata *data = calldata;
1698
17ead6c8 1699 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1700
cdd4e68b 1701 data->rpc_status = task->tk_status;
26e976a8 1702 if (data->rpc_status == 0) {
f597c537 1703 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1704 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1705 renew_lease(data->o_res.server, data->timestamp);
3e309914 1706 data->rpc_done = 1;
26e976a8 1707 }
cdd4e68b
TM		 1708}
1709
1710static void nfs4_open_confirm_release(void *calldata)
1711{
1712 struct nfs4_opendata *data = calldata;
1713 struct nfs4_state *state = NULL;
1714
1715 /* If this request hasn't been cancelled, do nothing */
1716 if (data->cancelled == 0)
1717 goto out_free;
1718 /* In case of error, no cleanup! */
3e309914 1719 if (!data->rpc_done)
cdd4e68b 1720 goto out_free;
cdd4e68b 1721 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1722 if (!IS_ERR(state))
643168c2 1723 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1724out_free:
c6d00e63 1725 nfs4_opendata_put(data);
cdd4e68b
TM		 1726}
1727
1728static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1729 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1730 .rpc_call_done = nfs4_open_confirm_done,
1731 .rpc_release = nfs4_open_confirm_release,
1732};
1733
1734/*
1735 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1736 */
1737static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1738{
1739 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1740 struct rpc_task *task;
5138fde0
TM		 1741 struct rpc_message msg = {
1742 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1743 .rpc_argp = &data->c_arg,
1744 .rpc_resp = &data->c_res,
1745 .rpc_cred = data->owner->so_cred,
1746 };
c970aa85
TM		 1747 struct rpc_task_setup task_setup_data = {
1748 .rpc_client = server->client,
5138fde0 1749 .rpc_message = &msg,
c970aa85
TM		 1750 .callback_ops = &nfs4_open_confirm_ops,
1751 .callback_data = data,
101070ca 1752 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1753 .flags = RPC_TASK_ASYNC,
1754 };
1da177e4
LT		 1755 int status;
1756
17ead6c8 1757 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1758 kref_get(&data->kref);
3e309914
TM		 1759 data->rpc_done = 0;
1760 data->rpc_status = 0;
5138fde0 1761 data->timestamp = jiffies;
c970aa85 1762 task = rpc_run_task(&task_setup_data);
7a1218a2 1763 if (IS_ERR(task))
cdd4e68b 1764 return PTR_ERR(task);
cdd4e68b
TM		 1765 status = nfs4_wait_for_completion_rpc_task(task);
1766 if (status != 0) {
1767 data->cancelled = 1;
1768 smp_wmb();
1769 } else
1770 status = data->rpc_status;
e6b3c4db 1771 rpc_put_task(task);
1da177e4
LT		 1772 return status;
1773}
1774
24ac23ab 1775static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1776{
24ac23ab
TM		 1777 struct nfs4_opendata *data = calldata;
1778 struct nfs4_state_owner *sp = data->owner;
549b19cc 1779 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1780
24ac23ab 1781 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1782 goto out_wait;
aac00a8d
TM		 1783 /*
1784 * Check if we still need to send an OPEN call, or if we can use
1785 * a delegation instead.
1786 */
1787 if (data->state != NULL) {
1788 struct nfs_delegation *delegation;
1789
dc0b027d 1790 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1791 goto out_no_action;
aac00a8d
TM		 1792 rcu_read_lock();
1793 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1794 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1795 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1796 can_open_delegated(delegation, data->o_arg.fmode))
1797 goto unlock_no_action;
aac00a8d
TM		 1798 rcu_read_unlock();
1799 }
95b72eb0 1800 /* Update client id. */
549b19cc 1801 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1802 switch (data->o_arg.claim) {
1803 case NFS4_OPEN_CLAIM_PREVIOUS:
1804 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1805 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1806 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1807 case NFS4_OPEN_CLAIM_FH:
1808 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1809 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1810 }
26e976a8 1811 data->timestamp = jiffies;
035168ab 1812 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1813 &data->o_arg.seq_args,
2240a9e2
TM		 1814 &data->o_res.seq_res,
1815 task) != 0)
1816 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1817
1818 /* Set the create mode (note dependency on the session type) */
1819 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1820 if (data->o_arg.open_flags & O_EXCL) {
1821 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1822 if (nfs4_has_persistent_session(clp))
1823 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1824 else if (clp->cl_mvops->minor_version > 0)
1825 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1826 }
6ee41268 1827 return;
652f89f6
TM		 1828unlock_no_action:
1829 rcu_read_unlock();
6ee41268
TM		 1830out_no_action:
1831 task->tk_action = NULL;
c8da19b9 1832out_wait:
b75ad4cd 1833 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1834}
1835
24ac23ab
TM		 1836static void nfs4_open_done(struct rpc_task *task, void *calldata)
1837{
1838 struct nfs4_opendata *data = calldata;
1da177e4 1839
24ac23ab 1840 data->rpc_status = task->tk_status;
d898528c 1841
14516c3a
TM		 1842 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1843 return;
d898528c 1844
24ac23ab 1845 if (task->tk_status == 0) {
807d66d8
TM		 1846 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1847 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1848 case S_IFREG:
1849 break;
1850 case S_IFLNK:
24ac23ab 1851 data->rpc_status = -ELOOP;
6f926b5b
TM		 1852 break;
1853 case S_IFDIR:
24ac23ab 1854 data->rpc_status = -EISDIR;
6f926b5b
TM		 1855 break;
1856 default:
24ac23ab 1857 data->rpc_status = -ENOTDIR;
807d66d8 1858 }
6f926b5b 1859 }
26e976a8 1860 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1861 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1862 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1863 }
3e309914 1864 data->rpc_done = 1;
24ac23ab 1865}
6f926b5b 1866
24ac23ab
TM		 1867static void nfs4_open_release(void *calldata)
1868{
1869 struct nfs4_opendata *data = calldata;
1870 struct nfs4_state *state = NULL;
1871
1872 /* If this request hasn't been cancelled, do nothing */
1873 if (data->cancelled == 0)
1874 goto out_free;
1875 /* In case of error, no cleanup! */
3e309914 1876 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1877 goto out_free;
1878 /* In case we need an open_confirm, no cleanup! */
1879 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1880 goto out_free;
24ac23ab 1881 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1882 if (!IS_ERR(state))
643168c2 1883 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1884out_free:
c6d00e63 1885 nfs4_opendata_put(data);
24ac23ab
TM		 1886}
1887
1888static const struct rpc_call_ops nfs4_open_ops = {
1889 .rpc_call_prepare = nfs4_open_prepare,
1890 .rpc_call_done = nfs4_open_done,
1891 .rpc_release = nfs4_open_release,
1892};
1893
b257957e 1894static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1895{
1896 struct inode *dir = data->dir->d_inode;
1897 struct nfs_server *server = NFS_SERVER(dir);
1898 struct nfs_openargs *o_arg = &data->o_arg;
1899 struct nfs_openres *o_res = &data->o_res;
1900 struct rpc_task *task;
5138fde0
TM		 1901 struct rpc_message msg = {
1902 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1903 .rpc_argp = o_arg,
1904 .rpc_resp = o_res,
1905 .rpc_cred = data->owner->so_cred,
1906 };
c970aa85
TM		 1907 struct rpc_task_setup task_setup_data = {
1908 .rpc_client = server->client,
5138fde0 1909 .rpc_message = &msg,
c970aa85
TM		 1910 .callback_ops = &nfs4_open_ops,
1911 .callback_data = data,
101070ca 1912 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1913 .flags = RPC_TASK_ASYNC,
1914 };
24ac23ab
TM		 1915 int status;
1916
a9c92d6b 1917 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1918 kref_get(&data->kref);
3e309914
TM		 1919 data->rpc_done = 0;
1920 data->rpc_status = 0;
2ced46c2 1921 data->cancelled = 0;
bdeca1b7
TM		 1922 data->is_recover = 0;
1923 if (isrecover) {
8fe72bac 1924 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1925 data->is_recover = 1;
1926 }
c970aa85 1927 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1928 if (IS_ERR(task))
1929 return PTR_ERR(task);
1930 status = nfs4_wait_for_completion_rpc_task(task);
1931 if (status != 0) {
1932 data->cancelled = 1;
1933 smp_wmb();
1934 } else
1935 status = data->rpc_status;
1936 rpc_put_task(task);
1937
1938 return status;
1939}
1940
1941static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1942{
1943 struct inode *dir = data->dir->d_inode;
1944 struct nfs_openres *o_res = &data->o_res;
1945 int status;
1946
1947 status = nfs4_run_open_task(data, 1);
1948 if (status != 0 || !data->rpc_done)
1949 return status;
1950
6926afd1
TM		 1951 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1952
b257957e
AB		 1953 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1954 status = _nfs4_proc_open_confirm(data);
1955 if (status != 0)
1956 return status;
1957 }
1958
1959 return status;
1960}
1961
f3792d63
TM		 1962/*
1963 * Additional permission checks in order to distinguish between an
1964 * open for read, and an open for execute. This works around the
1965 * fact that NFSv4 OPEN treats read and execute permissions as being
1966 * the same.
1967 * Note that in the non-execute case, we want to turn off permission
1968 * checking if we just created a new file (POSIX open() semantics).
1969 */
6168f62c
WAA		 1970static int nfs4_opendata_access(struct rpc_cred *cred,
1971 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1972 struct nfs4_state *state, fmode_t fmode,
1973 int openflags)
6168f62c
WAA		 1974{
1975 struct nfs_access_entry cache;
1976 u32 mask;
1977
1978 /* access call failed or for some reason the server doesn't
1979 * support any access modes -- defer access call until later */
1980 if (opendata->o_res.access_supported == 0)
1981 return 0;
1982
1983 mask = 0;
f3792d63
TM		 1984 /*
1985 * Use openflags to check for exec, because fmode won't
1986 * always have FMODE_EXEC set when file open for exec.
1987 */
f8d9a897
WAA		 1988 if (openflags & __FMODE_EXEC) {
1989 /* ONLY check for exec rights */
1990 mask = MAY_EXEC;
f3792d63 1991 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 1992 mask = MAY_READ;
6168f62c
WAA		 1993
1994 cache.cred = cred;
1995 cache.jiffies = jiffies;
1996 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1997 nfs_access_add_cache(state->inode, &cache);
1998
bbd3a8ee 1999 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2000 return 0;
2001
2002 /* even though OPEN succeeded, access is denied. Close the file */
2003 nfs4_close_state(state, fmode);
998f40b5 2004 return -EACCES;
6168f62c
WAA		 2005}
2006
b257957e
AB		 2007/*
2008 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2009 */
2010static int _nfs4_proc_open(struct nfs4_opendata *data)
2011{
2012 struct inode *dir = data->dir->d_inode;
2013 struct nfs_server *server = NFS_SERVER(dir);
2014 struct nfs_openargs *o_arg = &data->o_arg;
2015 struct nfs_openres *o_res = &data->o_res;
2016 int status;
2017
2018 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2019 if (!data->rpc_done)
2020 return status;
2021 if (status != 0) {
2022 if (status == -NFS4ERR_BADNAME &&
2023 !(o_arg->open_flags & O_CREAT))
2024 return -ENOENT;
24ac23ab 2025 return status;
08ef7bd3 2026 }
24ac23ab 2027
6926afd1
TM		 2028 nfs_fattr_map_and_free_names(server, &data->f_attr);
2029
5bc2afc2 2030 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2031 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2032 if (o_arg->open_flags & O_EXCL)
2033 data->file_created = 1;
2034 else if (o_res->cinfo.before != o_res->cinfo.after)
2035 data->file_created = 1;
2036 }
0df5dd4a
TM		 2037 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2038 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2039 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2040 status = _nfs4_proc_open_confirm(data);
1da177e4 2041 if (status != 0)
24ac23ab 2042 return status;
1da177e4
LT		 2043 }
2044 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2045 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2046 return 0;
1da177e4
LT		 2047}
2048
d83217c1
AA		 2049static int nfs4_recover_expired_lease(struct nfs_server *server)
2050{
2051 return nfs4_client_recover_expired_lease(server->nfs_client);
2052}
2053
1da177e4
LT		 2054/*
2055 * OPEN_EXPIRED:
2056 * reclaim state on the server after a network partition.
2057 * Assumes caller holds the appropriate lock
2058 */
539cd03a 2059static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2060{
e56e0b78 2061 struct nfs4_opendata *opendata;
864472e9 2062 int ret;
1da177e4 2063
4a1c0893 2064 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2065 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2066 if (IS_ERR(opendata))
2067 return PTR_ERR(opendata);
864472e9 2068 ret = nfs4_open_recover(opendata, state);
35d05778 2069 if (ret == -ESTALE)
3d4ff43d 2070 d_drop(ctx->dentry);
c6d00e63 2071 nfs4_opendata_put(opendata);
864472e9 2072 return ret;
1da177e4
LT		 2073}
2074
a9ed2e25 2075static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2076{
539cd03a 2077 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2078 struct nfs4_exception exception = { };
2079 int err;
2080
2081 do {
539cd03a 2082 err = _nfs4_open_expired(ctx, state);
42113a75 2083 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2084 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2085 continue;
a9ed2e25
TM		 2086 switch (err) {
2087 default:
2088 goto out;
2089 case -NFS4ERR_GRACE:
2090 case -NFS4ERR_DELAY:
2091 nfs4_handle_exception(server, err, &exception);
2092 err = 0;
2093 }
202b50dc 2094 } while (exception.retry);
a9ed2e25 2095out:
202b50dc
TM		 2096 return err;
2097}
2098
1da177e4
LT		 2099static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2100{
1da177e4 2101 struct nfs_open_context *ctx;
864472e9 2102 int ret;
1da177e4 2103
864472e9
TM		 2104 ctx = nfs4_state_find_open_context(state);
2105 if (IS_ERR(ctx))
91876b13 2106 return -EAGAIN;
539cd03a 2107 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2108 put_nfs_open_context(ctx);
2109 return ret;
1da177e4
LT		 2110}
2111
4dfd4f7a
TM		 2112static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2113{
2114 nfs_remove_bad_delegation(state->inode);
2115 write_seqlock(&state->seqlock);
2116 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2117 write_sequnlock(&state->seqlock);
2118 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2119}
2120
2121static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2122{
2123 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2124 nfs_finish_clear_delegation_stateid(state);
2125}
2126
2127static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2128{
2129 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2130 nfs40_clear_delegation_stateid(state);
2131 return nfs4_open_expired(sp, state);
2132}
2133
f062eb6c 2134#if defined(CONFIG_NFS_V4_1)
0c116cad 2135static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2136{
f062eb6c 2137 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2138 nfs4_stateid stateid;
ab7cb0df 2139 struct nfs_delegation *delegation;
0c116cad
TM		 2140 struct rpc_cred *cred;
2141 int status;
3e60ffdd 2142
ab7cb0df
TM		 2143 /* Get the delegation credential for use by test/free_stateid */
2144 rcu_read_lock();
2145 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2146 if (delegation == NULL) {
ab7cb0df 2147 rcu_read_unlock();
0c116cad
TM		 2148 return;
2149 }
2150
2151 nfs4_stateid_copy(&stateid, &delegation->stateid);
2152 cred = get_rpccred(delegation->cred);
2153 rcu_read_unlock();
2154 status = nfs41_test_stateid(server, &stateid, cred);
2155 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2156
3e60ffdd
CL		 2157 if (status != NFS_OK) {
2158 /* Free the stateid unless the server explicitly
2159 * informs us the stateid is unrecognized. */
2160 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2161 nfs41_free_stateid(server, &stateid, cred);
2162 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2163 }
ab7cb0df 2164
0c116cad 2165 put_rpccred(cred);
3e60ffdd
CL		 2166}
2167
2168/**
2169 * nfs41_check_open_stateid - possibly free an open stateid
2170 *
2171 * @state: NFSv4 state for an inode
2172 *
2173 * Returns NFS_OK if recovery for this stateid is now finished.
2174 * Otherwise a negative NFS4ERR value is returned.
2175 */
2176static int nfs41_check_open_stateid(struct nfs4_state *state)
2177{
2178 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2179 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2180 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2181 int status;
2182
2183 /* If a state reset has been done, test_stateid is unneeded */
2184 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2185 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2186 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2187 return -NFS4ERR_BAD_STATEID;
2188
ab7cb0df 2189 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2190 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2191 if (status != NFS_OK) {
2192 /* Free the stateid unless the server explicitly
2193 * informs us the stateid is unrecognized. */
2194 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2195 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2196
2197 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2198 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2199 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2200 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2201 }
2202 return status;
2203}
2204
2205static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2206{
eb64cf96 2207 int status;
b01dd1d8 2208
0c116cad 2209 nfs41_check_delegation_stateid(state);
3e60ffdd 2210 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2211 if (status != NFS_OK)
2212 status = nfs4_open_expired(sp, state);
2213 return status;
f062eb6c
BS		 2214}
2215#endif
2216
aa53ed54
JL		 2217/*
2218 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2219 * fields corresponding to attributes that were used to store the verifier.
2220 * Make sure we clobber those fields in the later setattr call
2221 */
2222static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2223{
2224 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2225 !(sattr->ia_valid & ATTR_ATIME_SET))
2226 sattr->ia_valid |= ATTR_ATIME;
2227
2228 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2229 !(sattr->ia_valid & ATTR_MTIME_SET))
2230 sattr->ia_valid |= ATTR_MTIME;
2231}
2232
c21443c2
TM		 2233static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2234 fmode_t fmode,
2235 int flags,
3efb9722 2236 struct nfs_open_context *ctx)
c21443c2
TM		 2237{
2238 struct nfs4_state_owner *sp = opendata->owner;
2239 struct nfs_server *server = sp->so_server;
275bb307 2240 struct dentry *dentry;
c21443c2
TM		 2241 struct nfs4_state *state;
2242 unsigned int seq;
2243 int ret;
2244
2245 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2246
2247 ret = _nfs4_proc_open(opendata);
dca78001 2248 if (ret != 0)
c21443c2
TM		 2249 goto out;
2250
2251 state = nfs4_opendata_to_nfs4_state(opendata);
2252 ret = PTR_ERR(state);
2253 if (IS_ERR(state))
2254 goto out;
2255 if (server->caps & NFS_CAP_POSIX_LOCK)
2256 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2257
275bb307
TM		 2258 dentry = opendata->dentry;
2259 if (dentry->d_inode == NULL) {
2260 /* FIXME: Is this d_drop() ever needed? */
2261 d_drop(dentry);
2262 dentry = d_add_unique(dentry, igrab(state->inode));
2263 if (dentry == NULL) {
2264 dentry = opendata->dentry;
2265 } else if (dentry != ctx->dentry) {
2266 dput(ctx->dentry);
2267 ctx->dentry = dget(dentry);
2268 }
2269 nfs_set_verifier(dentry,
2270 nfs_save_change_attribute(opendata->dir->d_inode));
2271 }
2272
c21443c2
TM		 2273 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2274 if (ret != 0)
2275 goto out;
2276
3efb9722 2277 ctx->state = state;
c45ffdd2
TM		 2278 if (dentry->d_inode == state->inode) {
2279 nfs_inode_attach_open_context(ctx);
2280 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2281 nfs4_schedule_stateid_recovery(server, state);
2282 }
c21443c2
TM		 2283out:
2284 return ret;
2285}
2286
1da177e4 2287/*
24ac23ab 2288 * Returns a referenced nfs4_state
1da177e4 2289 */
82be417a 2290static int _nfs4_do_open(struct inode *dir,
4197a055 2291 struct nfs_open_context *ctx,
82be417a
AA		 2292 int flags,
2293 struct iattr *sattr,
5bc2afc2
TM		 2294 struct nfs4_label *label,
2295 int *opened)
1da177e4
LT		 2296{
2297 struct nfs4_state_owner *sp;
2298 struct nfs4_state *state = NULL;
2299 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2300 struct nfs4_opendata *opendata;
4197a055
TM		 2301 struct dentry *dentry = ctx->dentry;
2302 struct rpc_cred *cred = ctx->cred;
2303 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2304 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2305 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2306 struct nfs4_label *olabel = NULL;
aac00a8d 2307 int status;
1da177e4
LT		 2308
2309 /* Protect against reboot recovery conflicts */
1da177e4 2310 status = -ENOMEM;
d1e284d5
TM		 2311 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2312 if (sp == NULL) {
1da177e4
LT		 2313 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2314 goto out_err;
2315 }
58d9714a
TM		 2316 status = nfs4_recover_expired_lease(server);
2317 if (status != 0)
b4454fe1 2318 goto err_put_state_owner;
82a2c1b7
AV		 2319 if (dentry->d_inode != NULL)
2320 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2321 status = -ENOMEM;
49f9a0fa
TM		 2322 if (dentry->d_inode)
2323 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2324 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2325 label, claim, GFP_KERNEL);
e56e0b78 2326 if (opendata == NULL)
95d35cb4 2327 goto err_put_state_owner;
1da177e4 2328
14c43f76
DQ		 2329 if (label) {
2330 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2331 if (IS_ERR(olabel)) {
2332 status = PTR_ERR(olabel);
2333 goto err_opendata_put;
2334 }
2335 }
2336
e911b815
TM		 2337 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2338 if (!opendata->f_attr.mdsthreshold) {
2339 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2340 if (!opendata->f_attr.mdsthreshold)
2341 goto err_free_label;
2342 }
1549210f 2343 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2344 }
82a2c1b7
AV		 2345 if (dentry->d_inode != NULL)
2346 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2347
3efb9722 2348 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2349 if (status != 0)
14c43f76 2350 goto err_free_label;
3efb9722 2351 state = ctx->state;
6168f62c 2352
549b19cc
TM		 2353 if ((opendata->o_arg.open_flags & O_EXCL) &&
2354 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2355 nfs4_exclusive_attrset(opendata, sattr);
2356
2357 nfs_fattr_init(opendata->o_res.f_attr);
2358 status = nfs4_do_setattr(state->inode, cred,
2359 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2360 state, label, olabel);
2361 if (status == 0) {
0ab64e0e 2362 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2363 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2364 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2365 }
0ab64e0e 2366 }
5bc2afc2
TM		 2367 if (opendata->file_created)
2368 *opened |= FILE_CREATED;
82be417a 2369
e911b815 2370 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2371 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2372 opendata->f_attr.mdsthreshold = NULL;
2373 }
82be417a 2374
14c43f76
DQ		 2375 nfs4_label_free(olabel);
2376
c6d00e63 2377 nfs4_opendata_put(opendata);
1da177e4 2378 nfs4_put_state_owner(sp);
1da177e4 2379 return 0;
14c43f76
DQ		 2380err_free_label:
2381 nfs4_label_free(olabel);
c6d00e63
TM		 2382err_opendata_put:
2383 nfs4_opendata_put(opendata);
e56e0b78
TM		 2384err_put_state_owner:
2385 nfs4_put_state_owner(sp);
1da177e4 2386out_err:
1da177e4
LT		 2387 return status;
2388}
2389
2390
82be417a 2391static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2392 struct nfs_open_context *ctx,
82be417a
AA		 2393 int flags,
2394 struct iattr *sattr,
5bc2afc2
TM		 2395 struct nfs4_label *label,
2396 int *opened)
1da177e4 2397{
49f9a0fa 2398 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2399 struct nfs4_exception exception = { };
2400 struct nfs4_state *res;
2401 int status;
2402
2403 do {
5bc2afc2 2404 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2405 res = ctx->state;
42113a75 2406 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2407 if (status == 0)
2408 break;
2409 /* NOTE: BAD_SEQID means the server and client disagree about the
2410 * book-keeping w.r.t. state-changing operations
2411 * (OPEN/CLOSE/LOCK/LOCKU...)
2412 * It is actually a sign of a bug on the client or on the server.
2413 *
2414 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2415 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2416 * have unhashed the old state_owner for us, and that we can
2417 * therefore safely retry using a new one. We should still warn
2418 * the user though...
2419 */
2420 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2421 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2422 " returned a bad sequence-id error!\n",
2423 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2424 exception.retry = 1;
2425 continue;
2426 }
550f5747
TM		 2427 /*
2428 * BAD_STATEID on OPEN means that the server cancelled our
2429 * state before it received the OPEN_CONFIRM.
2430 * Recover by retrying the request as per the discussion
2431 * on Page 181 of RFC3530.
2432 */
2433 if (status == -NFS4ERR_BAD_STATEID) {
2434 exception.retry = 1;
2435 continue;
2436 }
aac00a8d
TM		 2437 if (status == -EAGAIN) {
2438 /* We must have found a delegation */
2439 exception.retry = 1;
2440 continue;
2441 }
49f9a0fa
TM		 2442 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2443 continue;
2444 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2445 status, &exception));
2446 } while (exception.retry);
2447 return res;
2448}
2449
659bfcd6
TM		 2450static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2451 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2452 struct nfs4_state *state, struct nfs4_label *ilabel,
2453 struct nfs4_label *olabel)
1da177e4 2454{
3e4f6290 2455 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2456 struct nfs_setattrargs arg = {
3e4f6290 2457 .fh = NFS_FH(inode),
1da177e4
LT		 2458 .iap = sattr,
2459 .server = server,
2460 .bitmask = server->attr_bitmask,
1775fd3e 2461 .label = ilabel,
1da177e4
LT		 2462 };
2463 struct nfs_setattrres res = {
2464 .fattr = fattr,
1775fd3e 2465 .label = olabel,
1da177e4
LT		 2466 .server = server,
2467 };
2468 struct rpc_message msg = {
659bfcd6
TM		 2469 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2470 .rpc_argp = &arg,
2471 .rpc_resp = &res,
2472 .rpc_cred = cred,
1da177e4 2473 };
26e976a8 2474 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2475 fmode_t fmode;
2476 bool truncate;
65e4308d 2477 int status;
1da177e4 2478
aa9c2669
DQ		 2479 arg.bitmask = nfs4_bitmask(server, ilabel);
2480 if (ilabel)
2481 arg.bitmask = nfs4_bitmask(server, olabel);
2482
0e574af1 2483 nfs_fattr_init(fattr);
1da177e4 2484
ee3ae84e
TM		 2485 /* Servers should only apply open mode checks for file size changes */
2486 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2487 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2488
2489 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2490 /* Use that stateid */
0418dae1 2491 } else if (truncate && state != NULL) {
2a369153
TM		 2492 struct nfs_lockowner lockowner = {
2493 .l_owner = current->files,
2494 .l_pid = current->tgid,
2495 };
0418dae1
TM		 2496 if (!nfs4_valid_open_stateid(state))
2497 return -EBADF;
2498 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2499 &lockowner) == -EIO)
2500 return -EBADF;
08e9eac4 2501 } else
f597c537 2502 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2503
7c513058 2504 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2505 if (status == 0 && state != NULL)
2506 renew_lease(server, timestamp);
65e4308d 2507 return status;
1da177e4
LT		 2508}
2509
659bfcd6
TM		 2510static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2511 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2512 struct nfs4_state *state, struct nfs4_label *ilabel,
2513 struct nfs4_label *olabel)
1da177e4 2514{
3e4f6290 2515 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2516 struct nfs4_exception exception = {
2517 .state = state,
3114ea7a 2518 .inode = inode,
a1d0b5ee 2519 };
1da177e4
LT		 2520 int err;
2521 do {
1775fd3e 2522 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2523 trace_nfs4_setattr(inode, err);
451146be
TM		 2524 switch (err) {
2525 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2526 if (!(sattr->ia_valid & ATTR_SIZE)) {
2527 pr_warn_once("NFSv4: server %s is incorrectly "
2528 "applying open mode checks to "
2529 "a SETATTR that is not "
2530 "changing file size.\n",
2531 server->nfs_client->cl_hostname);
2532 }
451146be
TM		 2533 if (state && !(state->state & FMODE_WRITE)) {
2534 err = -EBADF;
2535 if (sattr->ia_valid & ATTR_OPEN)
2536 err = -EACCES;
2537 goto out;
2538 }
2539 }
2540 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2541 } while (exception.retry);
451146be 2542out:
1da177e4
LT		 2543 return err;
2544}
2545
2546struct nfs4_closedata {
2547 struct inode *inode;
2548 struct nfs4_state *state;
2549 struct nfs_closeargs arg;
2550 struct nfs_closeres res;
516a6af6 2551 struct nfs_fattr fattr;
26e976a8 2552 unsigned long timestamp;
f7e8917a
FI		 2553 bool roc;
2554 u32 roc_barrier;
1da177e4
LT		 2555};
2556
963d8fe5 2557static void nfs4_free_closedata(void *data)
9512135d 2558{
963d8fe5
TM		 2559 struct nfs4_closedata *calldata = data;
2560 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2561 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2562
f7e8917a
FI		 2563 if (calldata->roc)
2564 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2565 nfs4_put_open_state(calldata->state);
2566 nfs_free_seqid(calldata->arg.seqid);
9512135d 2567 nfs4_put_state_owner(sp);
322b2b90 2568 nfs_sb_deactive(sb);
9512135d
TM		 2569 kfree(calldata);
2570}
2571
963d8fe5 2572static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2573{
963d8fe5 2574 struct nfs4_closedata *calldata = data;
1da177e4 2575 struct nfs4_state *state = calldata->state;
1da177e4 2576 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2577 nfs4_stateid *res_stateid = NULL;
1da177e4 2578
a3ca5651 2579 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2580 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2581 return;
42113a75 2582 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2583 /* hmm. we are done with the inode, and in the process of freeing
2584 * the state_owner. we keep this around to process errors
2585 */
1da177e4
LT		 2586 switch (task->tk_status) {
2587 case 0:
412f6c4c
TM		 2588 res_stateid = &calldata->res.stateid;
2589 if (calldata->arg.fmode == 0 && calldata->roc)
f7e8917a
FI		 2590 pnfs_roc_set_barrier(state->inode,
2591 calldata->roc_barrier);
26e976a8 2592 renew_lease(server, calldata->timestamp);
412f6c4c 2593 break;
69794ad7 2594 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2595 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2596 case -NFS4ERR_OLD_STATEID:
2597 case -NFS4ERR_BAD_STATEID:
1da177e4 2598 case -NFS4ERR_EXPIRED:
dc0b027d 2599 if (calldata->arg.fmode == 0)
9e33bed5 2600 break;
1da177e4 2601 default:
8478eaa1 2602 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2603 rpc_restart_call_prepare(task);
69794ad7
TM		 2604 goto out_release;
2605 }
1da177e4 2606 }
412f6c4c 2607 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
69794ad7 2608out_release:
72211dbe 2609 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2610 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2611 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2612}
2613
4ce70ada 2614static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2615{
4ce70ada 2616 struct nfs4_closedata *calldata = data;
9512135d 2617 struct nfs4_state *state = calldata->state;
7fdab069 2618 struct inode *inode = calldata->inode;
aee7af35 2619 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2620 int call_close = 0;
9512135d 2621
a3ca5651 2622 dprintk("%s: begin!\n", __func__);
963d8fe5 2623 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2624 goto out_wait;
003707c7 2625
88069f77 2626 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2627 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2628 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2629 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2630 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
003707c7 2631 /* Calculate the change in open mode */
cd9288ff 2632 calldata->arg.fmode = 0;
e7616923 2633 if (state->n_rdwr == 0) {
cd9288ff
TM		 2634 if (state->n_rdonly == 0)
2635 call_close |= is_rdonly;
2636 else if (is_rdonly)
2637 calldata->arg.fmode |= FMODE_READ;
2638 if (state->n_wronly == 0)
2639 call_close |= is_wronly;
2640 else if (is_wronly)
2641 calldata->arg.fmode |= FMODE_WRITE;
2642 } else if (is_rdwr)
2643 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2644
2645 if (calldata->arg.fmode == 0)
2646 call_close |= is_rdwr;
2647
5d422301
TM		 2648 if (!nfs4_valid_open_stateid(state))
2649 call_close = 0;
4cecb76f 2650 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2651
2652 if (!call_close) {
963d8fe5 2653 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2654 goto out_no_action;
9512135d 2655 }
88069f77 2656
f7e8917a 2657 if (calldata->arg.fmode == 0) {
88069f77 2658 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2659 if (calldata->roc &&
b9536ad5
AA		 2660 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2661 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2662 goto out_wait;
b9536ad5 2663 }
f7e8917a 2664 }
88069f77 2665
516a6af6 2666 nfs_fattr_init(calldata->res.fattr);
26e976a8 2667 calldata->timestamp = jiffies;
7fdab069 2668 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2669 &calldata->arg.seq_args,
2670 &calldata->res.seq_res,
2240a9e2
TM		 2671 task) != 0)
2672 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2673 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2674 return;
2675out_no_action:
2676 task->tk_action = NULL;
2677out_wait:
2678 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2679}
2680
963d8fe5 2681static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2682 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2683 .rpc_call_done = nfs4_close_done,
2684 .rpc_release = nfs4_free_closedata,
2685};
2686
fe08c546
PT		 2687static bool nfs4_state_has_opener(struct nfs4_state *state)
2688{
2689 /* first check existing openers */
2690 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 &&
2691 state->n_rdonly != 0)
2692 return true;
2693
2694 if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 &&
2695 state->n_wronly != 0)
2696 return true;
2697
2698 if (test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 &&
2699 state->n_rdwr != 0)
2700 return true;
2701
2702 return false;
2703}
2704
2705static bool nfs4_roc(struct inode *inode)
2706{
2707 struct nfs_inode *nfsi = NFS_I(inode);
2708 struct nfs_open_context *ctx;
2709 struct nfs4_state *state;
2710
2711 spin_lock(&inode->i_lock);
2712 list_for_each_entry(ctx, &nfsi->open_files, list) {
2713 state = ctx->state;
2714 if (state == NULL)
2715 continue;
2716 if (nfs4_state_has_opener(state)) {
2717 spin_unlock(&inode->i_lock);
2718 return false;
2719 }
2720 }
2721 spin_unlock(&inode->i_lock);
2722
2723 if (nfs4_check_delegation(inode, FMODE_READ))
2724 return false;
2725
2726 return pnfs_roc(inode);
2727}
2728
1da177e4
LT		 2729/*
2730 * It is possible for data to be read/written from a mem-mapped file
2731 * after the sys_close call (which hits the vfs layer as a flush).
2732 * This means that we can't safely call nfsv4 close on a file until
2733 * the inode is cleared. This in turn means that we are not good
2734 * NFSv4 citizens - we do not indicate to the server to update the file's
2735 * share state even when we are done with one of the three share
2736 * stateid's in the inode.
2737 *
2738 * NOTE: Caller must be holding the sp->so_owner semaphore!
2739 */
1f7977c1 2740int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2741{
4a35bd41 2742 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2743 struct nfs4_closedata *calldata;
b39e625b
TM		 2744 struct nfs4_state_owner *sp = state->owner;
2745 struct rpc_task *task;
5138fde0
TM		 2746 struct rpc_message msg = {
2747 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2748 .rpc_cred = state->owner->so_cred,
2749 };
c970aa85
TM		 2750 struct rpc_task_setup task_setup_data = {
2751 .rpc_client = server->client,
5138fde0 2752 .rpc_message = &msg,
c970aa85 2753 .callback_ops = &nfs4_close_ops,
101070ca 2754 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2755 .flags = RPC_TASK_ASYNC,
2756 };
9512135d 2757 int status = -ENOMEM;
1da177e4 2758
fa940720
WAA		 2759 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2760 &task_setup_data.rpc_client, &msg);
2761
8535b2be 2762 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2763 if (calldata == NULL)
9512135d 2764 goto out;
a9c92d6b 2765 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2766 calldata->inode = state->inode;
1da177e4 2767 calldata->state = state;
4a35bd41 2768 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2769 calldata->arg.stateid = &state->open_stateid;
1da177e4 2770 /* Serialization for the sequence id */
8535b2be 2771 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2772 if (calldata->arg.seqid == NULL)
2773 goto out_free_calldata;
dc0b027d 2774 calldata->arg.fmode = 0;
a65318bf 2775 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2776 calldata->res.fattr = &calldata->fattr;
c1d51931 2777 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2778 calldata->res.server = server;
fe08c546 2779 calldata->roc = nfs4_roc(state->inode);
643168c2 2780 nfs_sb_active(calldata->inode->i_sb);
9512135d 2781
1174dd1f
TM		 2782 msg.rpc_argp = &calldata->arg;
2783 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2784 task_setup_data.callback_data = calldata;
2785 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2786 if (IS_ERR(task))
2787 return PTR_ERR(task);
a49c3c77
TM		 2788 status = 0;
2789 if (wait)
2790 status = rpc_wait_for_completion_task(task);
b39e625b 2791 rpc_put_task(task);
a49c3c77 2792 return status;
9512135d
TM		 2793out_free_calldata:
2794 kfree(calldata);
2795out:
b39e625b
TM		 2796 nfs4_put_open_state(state);
2797 nfs4_put_state_owner(sp);
9512135d 2798 return status;
1da177e4
LT		 2799}
2800
2b484297 2801static struct inode *
5bc2afc2
TM		 2802nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2803 int open_flags, struct iattr *attr, int *opened)
1da177e4 2804{
1da177e4 2805 struct nfs4_state *state;
aa9c2669
DQ		 2806 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2807
2808 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2809
565277f6 2810 /* Protect against concurrent sillydeletes */
5bc2afc2 2811 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2812
2813 nfs4_label_release_security(label);
2814
f46e0bd3
TM		 2815 if (IS_ERR(state))
2816 return ERR_CAST(state);
275bb307 2817 return state->inode;
1da177e4
LT		 2818}
2819
1185a552 2820static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2821{
2822 if (ctx->state == NULL)
2823 return;
2824 if (is_sync)
643168c2 2825 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2826 else
643168c2 2827 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2828}
1da177e4 2829
b944dba3
TM		 2830#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2831#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2832#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2833
1da177e4
LT		 2834static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2835{
43652ad5
BH		 2836 struct nfs4_server_caps_arg args = {
2837 .fhandle = fhandle,
2838 };
1da177e4
LT		 2839 struct nfs4_server_caps_res res = {};
2840 struct rpc_message msg = {
2841 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2842 .rpc_argp = &args,
1da177e4
LT		 2843 .rpc_resp = &res,
2844 };
2845 int status;
2846
7c513058 2847 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2848 if (status == 0) {
b944dba3
TM		 2849 /* Sanity check the server answers */
2850 switch (server->nfs_client->cl_minorversion) {
2851 case 0:
2852 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2853 res.attr_bitmask[2] = 0;
2854 break;
2855 case 1:
2856 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2857 break;
2858 case 2:
2859 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2860 }
1da177e4 2861 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2862 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2863 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2864 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2865 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2866 NFS_CAP_CTIME|NFS_CAP_MTIME|
2867 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2868 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2869 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2870 server->caps |= NFS_CAP_ACLS;
2871 if (res.has_links != 0)
2872 server->caps |= NFS_CAP_HARDLINKS;
2873 if (res.has_symlinks != 0)
2874 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2875 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2876 server->caps |= NFS_CAP_FILEID;
2877 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2878 server->caps |= NFS_CAP_MODE;
2879 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2880 server->caps |= NFS_CAP_NLINK;
2881 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2882 server->caps |= NFS_CAP_OWNER;
2883 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2884 server->caps |= NFS_CAP_OWNER_GROUP;
2885 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2886 server->caps |= NFS_CAP_ATIME;
2887 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2888 server->caps |= NFS_CAP_CTIME;
2889 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2890 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2891#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2892 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2893 server->caps |= NFS_CAP_SECURITY_LABEL;
2894#endif
2895 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2896 sizeof(server->attr_bitmask));
b944dba3 2897 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2898
a65318bf
TM		 2899 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2900 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2901 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2902 server->cache_consistency_bitmask[2] = 0;
1da177e4 2903 server->acl_bitmask = res.acl_bitmask;
264e6351 2904 server->fh_expire_type = res.fh_expire_type;
1da177e4 2905 }
cccef3b9 2906
1da177e4
LT		 2907 return status;
2908}
2909
55a97593 2910int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2911{
2912 struct nfs4_exception exception = { };
2913 int err;
2914 do {
2915 err = nfs4_handle_exception(server,
2916 _nfs4_server_capabilities(server, fhandle),
2917 &exception);
2918 } while (exception.retry);
2919 return err;
2920}
2921
2922static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2923 struct nfs_fsinfo *info)
2924{
aa9c2669 2925 u32 bitmask[3];
1da177e4 2926 struct nfs4_lookup_root_arg args = {
aa9c2669 2927 .bitmask = bitmask,
1da177e4
LT		 2928 };
2929 struct nfs4_lookup_res res = {
2930 .server = server,
0e574af1 2931 .fattr = info->fattr,
1da177e4
LT		 2932 .fh = fhandle,
2933 };
2934 struct rpc_message msg = {
2935 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2936 .rpc_argp = &args,
2937 .rpc_resp = &res,
2938 };
008f55d0 2939
aa9c2669
DQ		 2940 bitmask[0] = nfs4_fattr_bitmap[0];
2941 bitmask[1] = nfs4_fattr_bitmap[1];
2942 /*
2943 * Process the label in the upcoming getfattr
2944 */
2945 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2946
0e574af1 2947 nfs_fattr_init(info->fattr);
7c513058 2948 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2949}
2950
2951static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2952 struct nfs_fsinfo *info)
2953{
2954 struct nfs4_exception exception = { };
2955 int err;
2956 do {
fb8a5ba8 2957 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2958 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2959 switch (err) {
2960 case 0:
2961 case -NFS4ERR_WRONGSEC:
05e9cfb4 2962 goto out;
fb8a5ba8
BS		 2963 default:
2964 err = nfs4_handle_exception(server, err, &exception);
2965 }
1da177e4 2966 } while (exception.retry);
05e9cfb4 2967out:
1da177e4
LT		 2968 return err;
2969}
2970
8f70e95f
BS		 2971static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2972 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2973{
c2190661
TM		 2974 struct rpc_auth_create_args auth_args = {
2975 .pseudoflavor = flavor,
2976 };
8f70e95f
BS		 2977 struct rpc_auth *auth;
2978 int ret;
2979
c2190661 2980 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 2981 if (IS_ERR(auth)) {
75bc8821 2982 ret = -EACCES;
8f70e95f
BS		 2983 goto out;
2984 }
2985 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2986out:
2987 return ret;
2988}
2989
9a744ba3
CL		 2990/*
2991 * Retry pseudoroot lookup with various security flavors. We do this when:
2992 *
2993 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2994 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2995 *
2996 * Returns zero on success, or a negative NFS4ERR value, or a
2997 * negative errno value.
2998 */
801a16dc 2999static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3000 struct nfs_fsinfo *info)
1da177e4 3001{
9a744ba3
CL		 3002 /* Per 3530bis 15.33.5 */
3003 static const rpc_authflavor_t flav_array[] = {
3004 RPC_AUTH_GSS_KRB5P,
3005 RPC_AUTH_GSS_KRB5I,
3006 RPC_AUTH_GSS_KRB5,
c4eafe11 3007 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3008 RPC_AUTH_NULL,
3009 };
3010 int status = -EPERM;
3011 size_t i;
6a1a1e34 3012
4d4b69dd
WAA		 3013 if (server->auth_info.flavor_len > 0) {
3014 /* try each flavor specified by user */
3015 for (i = 0; i < server->auth_info.flavor_len; i++) {
3016 status = nfs4_lookup_root_sec(server, fhandle, info,
3017 server->auth_info.flavors[i]);
3018 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3019 continue;
3020 break;
3021 }
3022 } else {
3023 /* no flavors specified by user, try default list */
3024 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3025 status = nfs4_lookup_root_sec(server, fhandle, info,
3026 flav_array[i]);
3027 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3028 continue;
3029 break;
3030 }
8f70e95f 3031 }
9a744ba3 3032
fb8a5ba8
BS		 3033 /*
3034 * -EACCESS could mean that the user doesn't have correct permissions
3035 * to access the mount. It could also mean that we tried to mount
3036 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3037 * existing mount programs don't handle -EACCES very well so it should
3038 * be mapped to -EPERM instead.
3039 */
3040 if (status == -EACCES)
3041 status = -EPERM;
801a16dc
BS		 3042 return status;
3043}
3044
2ed4b95b
CL		 3045static int nfs4_do_find_root_sec(struct nfs_server *server,
3046 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3047{
3048 int mv = server->nfs_client->cl_minorversion;
3049 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3050}
3051
3052/**
3053 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3054 * @server: initialized nfs_server handle
3055 * @fhandle: we fill in the pseudo-fs root file handle
3056 * @info: we fill in an FSINFO struct
5e6b1990 3057 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3058 *
3059 * Returns zero on success, or a negative errno.
801a16dc 3060 */
3028eb2b 3061int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3062 struct nfs_fsinfo *info,
3063 bool auth_probe)
801a16dc 3064{
2ed4b95b
CL		 3065 int status;
3066
5e6b1990
TM		 3067 switch (auth_probe) {
3068 case false:
3069 status = nfs4_lookup_root(server, fhandle, info);
3070 if (status != -NFS4ERR_WRONGSEC)
3071 break;
5e6b1990 3072 default:
2ed4b95b 3073 status = nfs4_do_find_root_sec(server, fhandle, info);
5e6b1990 3074 }
2ed4b95b 3075
1da177e4
LT		 3076 if (status == 0)
3077 status = nfs4_server_capabilities(server, fhandle);
3078 if (status == 0)
3079 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3080
c12e87f4 3081 return nfs4_map_errors(status);
1da177e4
LT		 3082}
3083
bae36241
BS		 3084static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3085 struct nfs_fsinfo *info)
3086{
3087 int error;
3088 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3089 struct nfs4_label *label = NULL;
bae36241
BS		 3090
3091 error = nfs4_server_capabilities(server, mntfh);
3092 if (error < 0) {
3093 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3094 return error;
3095 }
3096
14c43f76
DQ		 3097 label = nfs4_label_alloc(server, GFP_KERNEL);
3098 if (IS_ERR(label))
3099 return PTR_ERR(label);
3100
1775fd3e 3101 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3102 if (error < 0) {
3103 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3104 goto err_free_label;
bae36241
BS		 3105 }
3106
3107 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3108 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3109 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3110
14c43f76
DQ		 3111err_free_label:
3112 nfs4_label_free(label);
3113
bae36241
BS		 3114 return error;
3115}
3116
6b97fd3d
MN		 3117/*
3118 * Get locations and (maybe) other attributes of a referral.
3119 * Note that we'll actually follow the referral later when
3120 * we detect fsid mismatch in inode revalidation
3121 */
f05d147f
BS		 3122static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3123 const struct qstr *name, struct nfs_fattr *fattr,
3124 struct nfs_fh *fhandle)
6b97fd3d
MN		 3125{
3126 int status = -ENOMEM;
3127 struct page *page = NULL;
3128 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3129
3130 page = alloc_page(GFP_KERNEL);
3131 if (page == NULL)
3132 goto out;
3133 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3134 if (locations == NULL)
3135 goto out;
3136
f05d147f 3137 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3138 if (status != 0)
3139 goto out;
519ae255
CL		 3140
3141 /*
3142 * If the fsid didn't change, this is a migration event, not a
3143 * referral. Cause us to drop into the exception handler, which
3144 * will kick off migration recovery.
3145 */
6b97fd3d 3146 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3147 dprintk("%s: server did not return a different fsid for"
3148 " a referral at %s\n", __func__, name->name);
519ae255 3149 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3150 goto out;
3151 }
533eb461
AA		 3152 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3153 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3154
533eb461 3155 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3156 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3157 memset(fhandle, 0, sizeof(struct nfs_fh));
3158out:
3159 if (page)
3160 __free_page(page);
5d7ca35a 3161 kfree(locations);
6b97fd3d
MN		 3162 return status;
3163}
3164
1775fd3e
DQ		 3165static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3166 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3167{
3168 struct nfs4_getattr_arg args = {
3169 .fh = fhandle,
3170 .bitmask = server->attr_bitmask,
3171 };
3172 struct nfs4_getattr_res res = {
3173 .fattr = fattr,
1775fd3e 3174 .label = label,
1da177e4
LT		 3175 .server = server,
3176 };
3177 struct rpc_message msg = {
3178 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3179 .rpc_argp = &args,
3180 .rpc_resp = &res,
3181 };
aa9c2669
DQ		 3182
3183 args.bitmask = nfs4_bitmask(server, label);
3184
0e574af1 3185 nfs_fattr_init(fattr);
7c513058 3186 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3187}
3188
1775fd3e
DQ		 3189static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3190 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3191{
3192 struct nfs4_exception exception = { };
3193 int err;
3194 do {
b5f875a9
TM		 3195 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3196 trace_nfs4_getattr(server, fhandle, fattr, err);
3197 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3198 &exception);
3199 } while (exception.retry);
3200 return err;
3201}
3202
3203/*
3204 * The file is not closed if it is opened due to the a request to change
3205 * the size of the file. The open call will not be needed once the
3206 * VFS layer lookup-intents are implemented.
3207 *
3208 * Close is called when the inode is destroyed.
3209 * If we haven't opened the file for O_WRONLY, we
3210 * need to in the size_change case to obtain a stateid.
3211 *
3212 * Got race?
3213 * Because OPEN is always done by name in nfsv4, it is
3214 * possible that we opened a different file by the same
3215 * name. We can recognize this race condition, but we
3216 * can't do anything about it besides returning an error.
3217 *
3218 * This will be fixed with VFS changes (lookup-intent).
3219 */
3220static int
3221nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3222 struct iattr *sattr)
3223{
08e9eac4 3224 struct inode *inode = dentry->d_inode;
659bfcd6 3225 struct rpc_cred *cred = NULL;
d530838b 3226 struct nfs4_state *state = NULL;
14c43f76 3227 struct nfs4_label *label = NULL;
1da177e4
LT		 3228 int status;
3229
88ac815c
PT		 3230 if (pnfs_ld_layoutret_on_setattr(inode) &&
3231 sattr->ia_valid & ATTR_SIZE &&
3232 sattr->ia_size < i_size_read(inode))
24028672 3233 pnfs_commit_and_return_layout(inode);
8a1636c4 3234
0e574af1 3235 nfs_fattr_init(fattr);
1da177e4 3236
2669940d
AA		 3237 /* Deal with open(O_TRUNC) */
3238 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3239 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3240
3241 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3242 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3243 return 0;
3244
d530838b 3245 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3246 if (sattr->ia_valid & ATTR_FILE) {
3247 struct nfs_open_context *ctx;
3248
3249 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3250 if (ctx) {
3251 cred = ctx->cred;
3252 state = ctx->state;
3253 }
659bfcd6 3254 }
08e9eac4 3255
14c43f76
DQ		 3256 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3257 if (IS_ERR(label))
3258 return PTR_ERR(label);
3259
3260 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3261 if (status == 0) {
65e4308d 3262 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 3263 nfs_setsecurity(inode, fattr, label);
3264 }
14c43f76 3265 nfs4_label_free(label);
1da177e4
LT		 3266 return status;
3267}
3268
0c2e53f1
TM		 3269static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3270 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3271 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3272{
0c2e53f1 3273 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3274 int status;
3275 struct nfs4_lookup_arg args = {
3276 .bitmask = server->attr_bitmask,
0c2e53f1 3277 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3278 .name = name,
3279 };
3280 struct nfs4_lookup_res res = {
3281 .server = server,
3282 .fattr = fattr,
aa9c2669 3283 .label = label,
2b3de441
DH		 3284 .fh = fhandle,
3285 };
3286 struct rpc_message msg = {
3287 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3288 .rpc_argp = &args,
3289 .rpc_resp = &res,
3290 };
3291
aa9c2669
DQ		 3292 args.bitmask = nfs4_bitmask(server, label);
3293
2b3de441
DH		 3294 nfs_fattr_init(fattr);
3295
1da177e4 3296 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3297 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3298 dprintk("NFS reply lookup: %d\n", status);
3299 return status;
3300}
3301
72de53ec 3302static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3303{
7ebb9315 3304 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3305 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3306 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3307 fattr->nlink = 2;
3308}
3309
72de53ec
BS		 3310static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3311 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3312 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3313{
3314 struct nfs4_exception exception = { };
72de53ec 3315 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3316 int err;
3317 do {
1775fd3e 3318 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3319 trace_nfs4_lookup(dir, name, err);
72de53ec 3320 switch (err) {
08ef7bd3 3321 case -NFS4ERR_BADNAME:
72de53ec
BS		 3322 err = -ENOENT;
3323 goto out;
0c2e53f1 3324 case -NFS4ERR_MOVED:
f05d147f 3325 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3326 goto out;
0c2e53f1 3327 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3328 err = -EPERM;
3329 if (client != *clnt)
3330 goto out;
66b06860 3331 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3332 if (IS_ERR(client))
3333 return PTR_ERR(client);
3334
3335 exception.retry = 1;
3336 break;
3337 default:
3338 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3339 }
1da177e4 3340 } while (exception.retry);
72de53ec
BS		 3341
3342out:
3343 if (err == 0)
3344 *clnt = client;
3345 else if (client != *clnt)
3346 rpc_shutdown_client(client);
3347
1da177e4
LT		 3348 return err;
3349}
3350
80a16b21 3351static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3352 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3353 struct nfs4_label *label)
72de53ec
BS		 3354{
3355 int status;
3356 struct rpc_clnt *client = NFS_CLIENT(dir);
3357
1775fd3e 3358 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3359 if (client != NFS_CLIENT(dir)) {
3360 rpc_shutdown_client(client);
3361 nfs_fixup_secinfo_attributes(fattr);
3362 }
3363 return status;
3364}
3365
f05d147f
BS		 3366struct rpc_clnt *
3367nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3368 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3369{
b72888cb 3370 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3371 int status;
f05d147f 3372
1775fd3e 3373 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3374 if (status < 0)
f05d147f 3375 return ERR_PTR(status);
b72888cb 3376 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3377}
3378
1da177e4
LT		 3379static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3380{
76b32999 3381 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3382 struct nfs4_accessargs args = {
3383 .fh = NFS_FH(inode),
a4980e78 3384 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3385 };
3386 struct nfs4_accessres res = {
3387 .server = server,
1da177e4 3388 };
1da177e4
LT		 3389 struct rpc_message msg = {
3390 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3391 .rpc_argp = &args,
3392 .rpc_resp = &res,
3393 .rpc_cred = entry->cred,
3394 };
3395 int mode = entry->mask;
aa9c2669 3396 int status = 0;
1da177e4
LT		 3397
3398 /*
3399 * Determine which access bits we want to ask for...
3400 */
3401 if (mode & MAY_READ)
3402 args.access |= NFS4_ACCESS_READ;
3403 if (S_ISDIR(inode->i_mode)) {
3404 if (mode & MAY_WRITE)
3405 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3406 if (mode & MAY_EXEC)
3407 args.access |= NFS4_ACCESS_LOOKUP;
3408 } else {
3409 if (mode & MAY_WRITE)
3410 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3411 if (mode & MAY_EXEC)
3412 args.access |= NFS4_ACCESS_EXECUTE;
3413 }
c407d41a
TM		 3414
3415 res.fattr = nfs_alloc_fattr();
3416 if (res.fattr == NULL)
3417 return -ENOMEM;
3418
7c513058 3419 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3420 if (!status) {
6168f62c 3421 nfs_access_set_mask(entry, res.access);
c407d41a 3422 nfs_refresh_inode(inode, res.fattr);
1da177e4 3423 }
c407d41a 3424 nfs_free_fattr(res.fattr);
1da177e4
LT		 3425 return status;
3426}
3427
3428static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3429{
3430 struct nfs4_exception exception = { };
3431 int err;
3432 do {
c1578b76
TM		 3433 err = _nfs4_proc_access(inode, entry);
3434 trace_nfs4_access(inode, err);
3435 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3436 &exception);
3437 } while (exception.retry);
3438 return err;
3439}
3440
3441/*
3442 * TODO: For the time being, we don't try to get any attributes
3443 * along with any of the zero-copy operations READ, READDIR,
3444 * READLINK, WRITE.
3445 *
3446 * In the case of the first three, we want to put the GETATTR
3447 * after the read-type operation -- this is because it is hard
3448 * to predict the length of a GETATTR response in v4, and thus
3449 * align the READ data correctly. This means that the GETATTR
3450 * may end up partially falling into the page cache, and we should
3451 * shift it into the 'tail' of the xdr_buf before processing.
3452 * To do this efficiently, we need to know the total length
3453 * of data received, which doesn't seem to be available outside
3454 * of the RPC layer.
3455 *
3456 * In the case of WRITE, we also want to put the GETATTR after
3457 * the operation -- in this case because we want to make sure
140150db 3458 * we get the post-operation mtime and size.
1da177e4
LT		 3459 *
3460 * Both of these changes to the XDR layer would in fact be quite
3461 * minor, but I decided to leave them for a subsequent patch.
3462 */
3463static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3464 unsigned int pgbase, unsigned int pglen)
3465{
3466 struct nfs4_readlink args = {
3467 .fh = NFS_FH(inode),
3468 .pgbase = pgbase,
3469 .pglen = pglen,
3470 .pages = &page,
3471 };
f50c7000 3472 struct nfs4_readlink_res res;
1da177e4
LT		 3473 struct rpc_message msg = {
3474 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3475 .rpc_argp = &args,
f50c7000 3476 .rpc_resp = &res,
1da177e4
LT		 3477 };
3478
7c513058 3479 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3480}
3481
3482static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3483 unsigned int pgbase, unsigned int pglen)
3484{
3485 struct nfs4_exception exception = { };
3486 int err;
3487 do {
c1578b76
TM		 3488 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3489 trace_nfs4_readlink(inode, err);
3490 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3491 &exception);
3492 } while (exception.retry);
3493 return err;
3494}
3495
1da177e4 3496/*
8867fe58 3497 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3498 */
1da177e4
LT		 3499static int
3500nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3501 int flags)
1da177e4 3502{
aa9c2669 3503 struct nfs4_label l, *ilabel = NULL;
8867fe58 3504 struct nfs_open_context *ctx;
1da177e4 3505 struct nfs4_state *state;
5bc2afc2 3506 int opened = 0;
1da177e4
LT		 3507 int status = 0;
3508
8867fe58
MS		 3509 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3510 if (IS_ERR(ctx))
3511 return PTR_ERR(ctx);
3512
aa9c2669
DQ		 3513 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3514
a8a5da99 3515 sattr->ia_mode &= ~current_umask();
5bc2afc2 3516 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3517 if (IS_ERR(state)) {
3518 status = PTR_ERR(state);
c0204fd2 3519 goto out;
1da177e4 3520 }
1da177e4 3521out:
aa9c2669 3522 nfs4_label_release_security(ilabel);
8867fe58 3523 put_nfs_open_context(ctx);
1da177e4
LT		 3524 return status;
3525}
3526
3527static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3528{
16e42959 3529 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3530 struct nfs_removeargs args = {
1da177e4 3531 .fh = NFS_FH(dir),
26fe5750 3532 .name = *name,
16e42959 3533 };
4fdc17b2 3534 struct nfs_removeres res = {
16e42959 3535 .server = server,
1da177e4 3536 };
1da177e4 3537 struct rpc_message msg = {
4fdc17b2
TM		 3538 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3539 .rpc_argp = &args,
3540 .rpc_resp = &res,
1da177e4 3541 };
778d2817 3542 int status;
1da177e4 3543
7c513058 3544 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3545 if (status == 0)
16e42959 3546 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3547 return status;
3548}
3549
3550static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3551{
3552 struct nfs4_exception exception = { };
3553 int err;
3554 do {
078ea3df
TM		 3555 err = _nfs4_proc_remove(dir, name);
3556 trace_nfs4_remove(dir, name, err);
3557 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3558 &exception);
3559 } while (exception.retry);
3560 return err;
3561}
3562
e4eff1a6 3563static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3564{
e4eff1a6
TM		 3565 struct nfs_server *server = NFS_SERVER(dir);
3566 struct nfs_removeargs *args = msg->rpc_argp;
3567 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3568
e4eff1a6 3569 res->server = server;
1da177e4 3570 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3571 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3572
3573 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3574}
3575
34e137cc
BS		 3576static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3577{
d9afbd1b
TM		 3578 nfs4_setup_sequence(NFS_SERVER(data->dir),
3579 &data->args.seq_args,
3580 &data->res.seq_res,
3581 task);
1da177e4
LT		 3582}
3583
e4eff1a6 3584static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3585{
078ea3df
TM		 3586 struct nfs_unlinkdata *data = task->tk_calldata;
3587 struct nfs_removeres *res = &data->res;
e4eff1a6 3588
14516c3a
TM		 3589 if (!nfs4_sequence_done(task, &res->seq_res))
3590 return 0;
8478eaa1
N		 3591 if (nfs4_async_handle_error(task, res->server, NULL,
3592 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3593 return 0;
3594 update_changeattr(dir, &res->cinfo);
e4eff1a6 3595 return 1;
1da177e4
LT		 3596}
3597
d3d4152a
JL		 3598static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3599{
3600 struct nfs_server *server = NFS_SERVER(dir);
3601 struct nfs_renameargs *arg = msg->rpc_argp;
3602 struct nfs_renameres *res = msg->rpc_resp;
3603
3604 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3605 res->server = server;
a9c92d6b 3606 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3607}
3608
c6bfa1a1
BS		 3609static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3610{
d9afbd1b
TM		 3611 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3612 &data->args.seq_args,
3613 &data->res.seq_res,
3614 task);
d3d4152a
JL		 3615}
3616
3617static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3618 struct inode *new_dir)
3619{
fbc6f7c2
TM		 3620 struct nfs_renamedata *data = task->tk_calldata;
3621 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3622
3623 if (!nfs4_sequence_done(task, &res->seq_res))
3624 return 0;
8478eaa1 3625 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3626 return 0;
3627
3628 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3629 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3630 return 1;
3631}
3632
1da177e4
LT		 3633static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3634{
91ba2eee 3635 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3636 struct nfs4_link_arg arg = {
3637 .fh = NFS_FH(inode),
3638 .dir_fh = NFS_FH(dir),
3639 .name = name,
91ba2eee
TM		 3640 .bitmask = server->attr_bitmask,
3641 };
91ba2eee
TM		 3642 struct nfs4_link_res res = {
3643 .server = server,
1775fd3e 3644 .label = NULL,
1da177e4 3645 };
1da177e4
LT		 3646 struct rpc_message msg = {
3647 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3648 .rpc_argp = &arg,
91ba2eee 3649 .rpc_resp = &res,
1da177e4 3650 };
136f2627
TM		 3651 int status = -ENOMEM;
3652
3653 res.fattr = nfs_alloc_fattr();
778d2817 3654 if (res.fattr == NULL)
136f2627 3655 goto out;
1da177e4 3656
14c43f76
DQ		 3657 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3658 if (IS_ERR(res.label)) {
3659 status = PTR_ERR(res.label);
3660 goto out;
3661 }
aa9c2669 3662 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3663
7c513058 3664 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3665 if (!status) {
3666 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3667 status = nfs_post_op_update_inode(inode, res.fattr);
3668 if (!status)
3669 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3670 }
14c43f76
DQ		 3671
3672
3673 nfs4_label_free(res.label);
3674
136f2627 3675out:
136f2627 3676 nfs_free_fattr(res.fattr);
1da177e4
LT		 3677 return status;
3678}
3679
3680static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3681{
3682 struct nfs4_exception exception = { };
3683 int err;
3684 do {
3685 err = nfs4_handle_exception(NFS_SERVER(inode),
3686 _nfs4_proc_link(inode, dir, name),
3687 &exception);
3688 } while (exception.retry);
3689 return err;
3690}
3691
57dc9a57
TM		 3692struct nfs4_createdata {
3693 struct rpc_message msg;
3694 struct nfs4_create_arg arg;
3695 struct nfs4_create_res res;
3696 struct nfs_fh fh;
3697 struct nfs_fattr fattr;
1775fd3e 3698 struct nfs4_label *label;
57dc9a57
TM		 3699};
3700
3701static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3702 struct qstr *name, struct iattr *sattr, u32 ftype)
3703{
3704 struct nfs4_createdata *data;
3705
3706 data = kzalloc(sizeof(*data), GFP_KERNEL);
3707 if (data != NULL) {
3708 struct nfs_server *server = NFS_SERVER(dir);
3709
14c43f76
DQ		 3710 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3711 if (IS_ERR(data->label))
3712 goto out_free;
3713
57dc9a57
TM		 3714 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3715 data->msg.rpc_argp = &data->arg;
3716 data->msg.rpc_resp = &data->res;
3717 data->arg.dir_fh = NFS_FH(dir);
3718 data->arg.server = server;
3719 data->arg.name = name;
3720 data->arg.attrs = sattr;
3721 data->arg.ftype = ftype;
aa9c2669 3722 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3723 data->res.server = server;
3724 data->res.fh = &data->fh;
3725 data->res.fattr = &data->fattr;
1775fd3e 3726 data->res.label = data->label;
57dc9a57 3727 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3728 }
3729 return data;
14c43f76
DQ		 3730out_free:
3731 kfree(data);
3732 return NULL;
57dc9a57
TM		 3733}
3734
3735static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3736{
7c513058 3737 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3738 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3739 if (status == 0) {
3740 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3741 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3742 }
3743 return status;
3744}
3745
3746static void nfs4_free_createdata(struct nfs4_createdata *data)
3747{
14c43f76 3748 nfs4_label_free(data->label);
57dc9a57
TM		 3749 kfree(data);
3750}
3751
4f390c15 3752static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3753 struct page *page, unsigned int len, struct iattr *sattr,
3754 struct nfs4_label *label)
1da177e4 3755{
57dc9a57
TM		 3756 struct nfs4_createdata *data;
3757 int status = -ENAMETOOLONG;
1da177e4 3758
94a6d753 3759 if (len > NFS4_MAXPATHLEN)
57dc9a57 3760 goto out;
4f390c15 3761
57dc9a57
TM		 3762 status = -ENOMEM;
3763 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3764 if (data == NULL)
3765 goto out;
3766
3767 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3768 data->arg.u.symlink.pages = &page;
3769 data->arg.u.symlink.len = len;
1775fd3e 3770 data->arg.label = label;
1da177e4 3771
57dc9a57
TM		 3772 status = nfs4_do_create(dir, dentry, data);
3773
3774 nfs4_free_createdata(data);
3775out:
1da177e4
LT		 3776 return status;
3777}
3778
4f390c15 3779static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3780 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3781{
3782 struct nfs4_exception exception = { };
aa9c2669 3783 struct nfs4_label l, *label = NULL;
1da177e4 3784 int err;
aa9c2669
DQ		 3785
3786 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3787
1da177e4 3788 do {
078ea3df
TM		 3789 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3790 trace_nfs4_symlink(dir, &dentry->d_name, err);
3791 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3792 &exception);
3793 } while (exception.retry);
aa9c2669
DQ		 3794
3795 nfs4_label_release_security(label);
1da177e4
LT		 3796 return err;
3797}
3798
3799static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3800 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3801{
57dc9a57
TM		 3802 struct nfs4_createdata *data;
3803 int status = -ENOMEM;
1da177e4 3804
57dc9a57
TM		 3805 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3806 if (data == NULL)
3807 goto out;
3808
1775fd3e 3809 data->arg.label = label;
57dc9a57
TM		 3810 status = nfs4_do_create(dir, dentry, data);
3811
3812 nfs4_free_createdata(data);
3813out:
1da177e4
LT		 3814 return status;
3815}
3816
3817static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3818 struct iattr *sattr)
3819{
3820 struct nfs4_exception exception = { };
aa9c2669 3821 struct nfs4_label l, *label = NULL;
1da177e4 3822 int err;
a8a5da99 3823
aa9c2669
DQ		 3824 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3825
a8a5da99 3826 sattr->ia_mode &= ~current_umask();
1da177e4 3827 do {
078ea3df
TM		 3828 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3829 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3830 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3831 &exception);
3832 } while (exception.retry);
aa9c2669
DQ		 3833 nfs4_label_release_security(label);
3834
1da177e4
LT		 3835 return err;
3836}
3837
3838static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3839 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3840{
3841 struct inode *dir = dentry->d_inode;
3842 struct nfs4_readdir_arg args = {
3843 .fh = NFS_FH(dir),
56e4ebf8 3844 .pages = pages,
1da177e4
LT		 3845 .pgbase = 0,
3846 .count = count,
96d25e53 3847 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3848 .plus = plus,
1da177e4
LT		 3849 };
3850 struct nfs4_readdir_res res;
3851 struct rpc_message msg = {
3852 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3853 .rpc_argp = &args,
3854 .rpc_resp = &res,
3855 .rpc_cred = cred,
3856 };
3857 int status;
3858
6de1472f
AV		 3859 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3860 dentry,
eadf4598 3861 (unsigned long long)cookie);
c3f52af3 3862 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3863 res.pgbase = args.pgbase;
7c513058 3864 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3865 if (status >= 0) {
c3f52af3 3866 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3867 status += args.pgbase;
3868 }
c4812998
TM		 3869
3870 nfs_invalidate_atime(dir);
3871
3110ff80 3872 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3873 return status;
3874}
3875
3876static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3877 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3878{
3879 struct nfs4_exception exception = { };
3880 int err;
3881 do {
c1578b76
TM		 3882 err = _nfs4_proc_readdir(dentry, cred, cookie,
3883 pages, count, plus);
3884 trace_nfs4_readdir(dentry->d_inode, err);
3885 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3886 &exception);
3887 } while (exception.retry);
3888 return err;
3889}
3890
3891static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3892 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3893{
57dc9a57
TM		 3894 struct nfs4_createdata *data;
3895 int mode = sattr->ia_mode;
3896 int status = -ENOMEM;
1da177e4 3897
57dc9a57
TM		 3898 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3899 if (data == NULL)
3900 goto out;
3901
1da177e4 3902 if (S_ISFIFO(mode))
57dc9a57 3903 data->arg.ftype = NF4FIFO;
1da177e4 3904 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3905 data->arg.ftype = NF4BLK;
3906 data->arg.u.device.specdata1 = MAJOR(rdev);
3907 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3908 }
3909 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3910 data->arg.ftype = NF4CHR;
3911 data->arg.u.device.specdata1 = MAJOR(rdev);
3912 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3913 } else if (!S_ISSOCK(mode)) {
3914 status = -EINVAL;
3915 goto out_free;
1da177e4 3916 }
1775fd3e 3917
aa9c2669 3918 data->arg.label = label;
57dc9a57 3919 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3920out_free:
57dc9a57
TM		 3921 nfs4_free_createdata(data);
3922out:
1da177e4
LT		 3923 return status;
3924}
3925
3926static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3927 struct iattr *sattr, dev_t rdev)
3928{
3929 struct nfs4_exception exception = { };
aa9c2669 3930 struct nfs4_label l, *label = NULL;
1da177e4 3931 int err;
a8a5da99 3932
aa9c2669
DQ		 3933 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3934
a8a5da99 3935 sattr->ia_mode &= ~current_umask();
1da177e4 3936 do {
078ea3df
TM		 3937 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3938 trace_nfs4_mknod(dir, &dentry->d_name, err);
3939 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3940 &exception);
3941 } while (exception.retry);
aa9c2669
DQ		 3942
3943 nfs4_label_release_security(label);
3944
1da177e4
LT		 3945 return err;
3946}
3947
3948static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3949 struct nfs_fsstat *fsstat)
3950{
3951 struct nfs4_statfs_arg args = {
3952 .fh = fhandle,
3953 .bitmask = server->attr_bitmask,
3954 };
24ad148a
BH		 3955 struct nfs4_statfs_res res = {
3956 .fsstat = fsstat,
3957 };
1da177e4
LT		 3958 struct rpc_message msg = {
3959 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3960 .rpc_argp = &args,
24ad148a 3961 .rpc_resp = &res,
1da177e4
LT		 3962 };
3963
0e574af1 3964 nfs_fattr_init(fsstat->fattr);
7c513058 3965 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3966}
3967
3968static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3969{
3970 struct nfs4_exception exception = { };
3971 int err;
3972 do {
3973 err = nfs4_handle_exception(server,
3974 _nfs4_proc_statfs(server, fhandle, fsstat),
3975 &exception);
3976 } while (exception.retry);
3977 return err;
3978}
3979
3980static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3981 struct nfs_fsinfo *fsinfo)
3982{
3983 struct nfs4_fsinfo_arg args = {
3984 .fh = fhandle,
3985 .bitmask = server->attr_bitmask,
3986 };
3dda5e43
BH		 3987 struct nfs4_fsinfo_res res = {
3988 .fsinfo = fsinfo,
3989 };
1da177e4
LT		 3990 struct rpc_message msg = {
3991 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3992 .rpc_argp = &args,
3dda5e43 3993 .rpc_resp = &res,
1da177e4
LT		 3994 };
3995
7c513058 3996 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3997}
3998
3999static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4000{
4001 struct nfs4_exception exception = { };
83ca7f5a 4002 unsigned long now = jiffies;
1da177e4
LT		 4003 int err;
4004
4005 do {
83ca7f5a 4006 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4007 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4008 if (err == 0) {
4009 struct nfs_client *clp = server->nfs_client;
4010
4011 spin_lock(&clp->cl_lock);
4012 clp->cl_lease_time = fsinfo->lease_time * HZ;
4013 clp->cl_last_renewal = now;
4014 spin_unlock(&clp->cl_lock);
4015 break;
4016 }
4017 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4018 } while (exception.retry);
4019 return err;
4020}
4021
4022static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4023{
e38eb650
BS		 4024 int error;
4025
0e574af1 4026 nfs_fattr_init(fsinfo->fattr);
e38eb650 4027 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4028 if (error == 0) {
4029 /* block layout checks this! */
4030 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4031 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4032 }
e38eb650
BS		 4033
4034 return error;
1da177e4
LT		 4035}
4036
4037static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4038 struct nfs_pathconf *pathconf)
4039{
4040 struct nfs4_pathconf_arg args = {
4041 .fh = fhandle,
4042 .bitmask = server->attr_bitmask,
4043 };
d45b2989
BH		 4044 struct nfs4_pathconf_res res = {
4045 .pathconf = pathconf,
4046 };
1da177e4
LT		 4047 struct rpc_message msg = {
4048 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4049 .rpc_argp = &args,
d45b2989 4050 .rpc_resp = &res,
1da177e4
LT		 4051 };
4052
4053 /* None of the pathconf attributes are mandatory to implement */
4054 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4055 memset(pathconf, 0, sizeof(*pathconf));
4056 return 0;
4057 }
4058
0e574af1 4059 nfs_fattr_init(pathconf->fattr);
7c513058 4060 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4061}
4062
4063static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4064 struct nfs_pathconf *pathconf)
4065{
4066 struct nfs4_exception exception = { };
4067 int err;
4068
4069 do {
4070 err = nfs4_handle_exception(server,
4071 _nfs4_proc_pathconf(server, fhandle, pathconf),
4072 &exception);
4073 } while (exception.retry);
4074 return err;
4075}
4076
5521abfd 4077int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4078 const struct nfs_open_context *ctx,
4079 const struct nfs_lock_context *l_ctx,
4080 fmode_t fmode)
4081{
4082 const struct nfs_lockowner *lockowner = NULL;
4083
4084 if (l_ctx != NULL)
4085 lockowner = &l_ctx->lockowner;
5521abfd 4086 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4087}
4088EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4089
5521abfd
TM		 4090static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4091 const struct nfs_open_context *ctx,
4092 const struct nfs_lock_context *l_ctx,
4093 fmode_t fmode)
4094{
4095 nfs4_stateid current_stateid;
4096
e1253be0
TM		 4097 /* If the current stateid represents a lost lock, then exit */
4098 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4099 return true;
5521abfd
TM		 4100 return nfs4_stateid_match(stateid, &current_stateid);
4101}
4102
4103static bool nfs4_error_stateid_expired(int err)
4104{
4105 switch (err) {
4106 case -NFS4ERR_DELEG_REVOKED:
4107 case -NFS4ERR_ADMIN_REVOKED:
4108 case -NFS4ERR_BAD_STATEID:
4109 case -NFS4ERR_STALE_STATEID:
4110 case -NFS4ERR_OLD_STATEID:
4111 case -NFS4ERR_OPENMODE:
4112 case -NFS4ERR_EXPIRED:
4113 return true;
4114 }
4115 return false;
4116}
4117
d45f60c6 4118void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4119{
d45f60c6 4120 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4121}
4122
d45f60c6 4123static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4124{
d45f60c6 4125 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4126
d45f60c6
WAA		 4127 trace_nfs4_read(hdr, task->tk_status);
4128 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4129 hdr->args.context->state,
4130 NULL) == -EAGAIN) {
d00c5d43 4131 rpc_restart_call_prepare(task);
ec06c096 4132 return -EAGAIN;
1da177e4 4133 }
8850df99 4134
d45f60c6 4135 __nfs4_read_done_cb(hdr);
1da177e4 4136 if (task->tk_status > 0)
d45f60c6 4137 renew_lease(server, hdr->timestamp);
ec06c096 4138 return 0;
1da177e4
LT		 4139}
4140
5521abfd 4141static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4142 struct nfs_pgio_args *args)
5521abfd
TM		 4143{
4144
4145 if (!nfs4_error_stateid_expired(task->tk_status) ||
4146 nfs4_stateid_is_current(&args->stateid,
4147 args->context,
4148 args->lock_context,
4149 FMODE_READ))
4150 return false;
4151 rpc_restart_call_prepare(task);
4152 return true;
4153}
4154
d45f60c6 4155static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4156{
4157
4158 dprintk("--> %s\n", __func__);
4159
d45f60c6 4160 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4161 return -EAGAIN;
d45f60c6 4162 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4163 return -EAGAIN;
d45f60c6
WAA		 4164 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4165 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4166}
4167
d45f60c6
WAA		 4168static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4169 struct rpc_message *msg)
1da177e4 4170{
d45f60c6
WAA		 4171 hdr->timestamp = jiffies;
4172 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4173 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4174 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4175}
4176
d45f60c6
WAA		 4177static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4178 struct nfs_pgio_header *hdr)
ea7c3303 4179{
d45f60c6
WAA		 4180 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4181 &hdr->args.seq_args,
4182 &hdr->res.seq_res,
9b206149 4183 task))
ef1820f9 4184 return 0;
d45f60c6
WAA		 4185 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4186 hdr->args.lock_context,
4187 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4188 return -EIO;
d45f60c6 4189 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4190 return -EIO;
4191 return 0;
1da177e4
LT		 4192}
4193
d45f60c6
WAA		 4194static int nfs4_write_done_cb(struct rpc_task *task,
4195 struct nfs_pgio_header *hdr)
1da177e4 4196{
d45f60c6 4197 struct inode *inode = hdr->inode;
8478eaa1 4198
d45f60c6
WAA		 4199 trace_nfs4_write(hdr, task->tk_status);
4200 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4201 hdr->args.context->state,
4202 NULL) == -EAGAIN) {
d00c5d43 4203 rpc_restart_call_prepare(task);
788e7a89 4204 return -EAGAIN;
1da177e4 4205 }
4f9838c7 4206 if (task->tk_status >= 0) {
d45f60c6
WAA		 4207 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4208 nfs_post_op_update_inode_force_wcc(inode, &hdr->fattr);
4f9838c7 4209 }
788e7a89 4210 return 0;
1da177e4
LT		 4211}
4212
5521abfd 4213static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4214 struct nfs_pgio_args *args)
5521abfd
TM		 4215{
4216
4217 if (!nfs4_error_stateid_expired(task->tk_status) ||
4218 nfs4_stateid_is_current(&args->stateid,
4219 args->context,
4220 args->lock_context,
4221 FMODE_WRITE))
4222 return false;
4223 rpc_restart_call_prepare(task);
4224 return true;
4225}
4226
d45f60c6 4227static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4228{
d45f60c6 4229 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4230 return -EAGAIN;
d45f60c6 4231 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4232 return -EAGAIN;
d45f60c6
WAA		 4233 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4234 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4235}
4236
5a37f851 4237static
d45f60c6 4238bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4239{
5a37f851 4240 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4241 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4242 return false;
4243 /* Otherwise, request attributes if and only if we don't hold
4244 * a delegation
4245 */
011e2a7f 4246 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4247}
a69aef14 4248
d45f60c6
WAA		 4249static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4250 struct rpc_message *msg)
1da177e4 4251{
d45f60c6 4252 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4253
d45f60c6
WAA		 4254 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4255 hdr->args.bitmask = NULL;
4256 hdr->res.fattr = NULL;
7ffd1064 4257 } else
d45f60c6 4258 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4259
d45f60c6
WAA		 4260 if (!hdr->pgio_done_cb)
4261 hdr->pgio_done_cb = nfs4_write_done_cb;
4262 hdr->res.server = server;
4263 hdr->timestamp = jiffies;
1da177e4 4264
bdc7f021 4265 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4266 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4267}
4268
0b7c0153 4269static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4270{
d9afbd1b
TM		 4271 nfs4_setup_sequence(NFS_SERVER(data->inode),
4272 &data->args.seq_args,
4273 &data->res.seq_res,
4274 task);
1da177e4
LT		 4275}
4276
0b7c0153 4277static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4278{
1da177e4 4279 struct inode *inode = data->inode;
14516c3a 4280
cc668ab3 4281 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4282 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4283 NULL, NULL) == -EAGAIN) {
d00c5d43 4284 rpc_restart_call_prepare(task);
788e7a89 4285 return -EAGAIN;
1da177e4 4286 }
788e7a89 4287 return 0;
1da177e4
LT		 4288}
4289
0b7c0153 4290static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4291{
4292 if (!nfs4_sequence_done(task, &data->res.seq_res))
4293 return -EAGAIN;
0b7c0153 4294 return data->commit_done_cb(task, data);
5f452431
FI		 4295}
4296
0b7c0153 4297static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4298{
788e7a89 4299 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4300
0b7c0153
FI		 4301 if (data->commit_done_cb == NULL)
4302 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4303 data->res.server = server;
bdc7f021 4304 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4305 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4306}
4307
9bc4e3ca
CL		 4308struct nfs4_renewdata {
4309 struct nfs_client *client;
4310 unsigned long timestamp;
4311};
4312
1da177e4
LT		 4313/*
4314 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4315 * standalone procedure for queueing an asynchronous RENEW.
4316 */
9bc4e3ca 4317static void nfs4_renew_release(void *calldata)
dc96aef9 4318{
9bc4e3ca
CL		 4319 struct nfs4_renewdata *data = calldata;
4320 struct nfs_client *clp = data->client;
dc96aef9 4321
0851de06
AB		 4322 if (atomic_read(&clp->cl_count) > 1)
4323 nfs4_schedule_state_renewal(clp);
4324 nfs_put_client(clp);
9bc4e3ca 4325 kfree(data);
dc96aef9
AB		 4326}
4327
9bc4e3ca 4328static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4329{
9bc4e3ca
CL		 4330 struct nfs4_renewdata *data = calldata;
4331 struct nfs_client *clp = data->client;
4332 unsigned long timestamp = data->timestamp;
1da177e4 4333
c6d01c6f 4334 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4335 switch (task->tk_status) {
4336 case 0:
4337 break;
4338 case -NFS4ERR_LEASE_MOVED:
4339 nfs4_schedule_lease_moved_recovery(clp);
4340 break;
4341 default:
95baa25c 4342 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4343 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4344 return;
4345 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4346 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4347 return;
4348 }
4349 nfs4_schedule_path_down_recovery(clp);
1da177e4 4350 }
452e9352 4351 do_renew_lease(clp, timestamp);
1da177e4
LT		 4352}
4353
963d8fe5
TM		 4354static const struct rpc_call_ops nfs4_renew_ops = {
4355 .rpc_call_done = nfs4_renew_done,
dc96aef9 4356 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4357};
4358
2f60ea6b 4359static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4360{
4361 struct rpc_message msg = {
4362 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4363 .rpc_argp = clp,
b4454fe1 4364 .rpc_cred = cred,
1da177e4 4365 };
9bc4e3ca 4366 struct nfs4_renewdata *data;
1da177e4 4367
2f60ea6b
TM		 4368 if (renew_flags == 0)
4369 return 0;
0851de06
AB		 4370 if (!atomic_inc_not_zero(&clp->cl_count))
4371 return -EIO;
b569ad34 4372 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4373 if (data == NULL)
4374 return -ENOMEM;
4375 data->client = clp;
4376 data->timestamp = jiffies;
bc7a05ca 4377 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4378 &nfs4_renew_ops, data);
1da177e4
LT		 4379}
4380
8534d4ec 4381static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4382{
4383 struct rpc_message msg = {
4384 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4385 .rpc_argp = clp,
b4454fe1 4386 .rpc_cred = cred,
1da177e4
LT		 4387 };
4388 unsigned long now = jiffies;
4389 int status;
4390
bc7a05ca 4391 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4392 if (status < 0)
4393 return status;
452e9352 4394 do_renew_lease(clp, now);
1da177e4
LT		 4395 return 0;
4396}
4397
aa1870af
BF		 4398static inline int nfs4_server_supports_acls(struct nfs_server *server)
4399{
7dd7d959 4400 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4401}
4402
21f498c2
TM		 4403/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4404 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4405 * the stack.
4406 */
21f498c2 4407#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4408
e9e3d724
NH		 4409static int buf_to_pages_noslab(const void *buf, size_t buflen,
4410 struct page **pages, unsigned int *pgbase)
4411{
4412 struct page *newpage, **spages;
4413 int rc = 0;
4414 size_t len;
4415 spages = pages;
4416
4417 do {
21f498c2 4418 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4419 newpage = alloc_page(GFP_KERNEL);
4420
4421 if (newpage == NULL)
4422 goto unwind;
4423 memcpy(page_address(newpage), buf, len);
4424 buf += len;
4425 buflen -= len;
4426 *pages++ = newpage;
4427 rc++;
4428 } while (buflen != 0);
4429
4430 return rc;
4431
4432unwind:
4433 for(; rc > 0; rc--)
4434 __free_page(spages[rc-1]);
4435 return -ENOMEM;
4436}
4437
e50a1c2e
BF		 4438struct nfs4_cached_acl {
4439 int cached;
4440 size_t len;
3e9d4154 4441 char data[0];
e50a1c2e
BF		 4442};
4443
4444static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4445{
4446 struct nfs_inode *nfsi = NFS_I(inode);
4447
4448 spin_lock(&inode->i_lock);
4449 kfree(nfsi->nfs4_acl);
4450 nfsi->nfs4_acl = acl;
4451 spin_unlock(&inode->i_lock);
4452}
4453
4454static void nfs4_zap_acl_attr(struct inode *inode)
4455{
4456 nfs4_set_cached_acl(inode, NULL);
4457}
4458
4459static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4460{
4461 struct nfs_inode *nfsi = NFS_I(inode);
4462 struct nfs4_cached_acl *acl;
4463 int ret = -ENOENT;
4464
4465 spin_lock(&inode->i_lock);
4466 acl = nfsi->nfs4_acl;
4467 if (acl == NULL)
4468 goto out;
4469 if (buf == NULL) /* user is just asking for length */
4470 goto out_len;
4471 if (acl->cached == 0)
4472 goto out;
4473 ret = -ERANGE; /* see getxattr(2) man page */
4474 if (acl->len > buflen)
4475 goto out;
4476 memcpy(buf, acl->data, acl->len);
4477out_len:
4478 ret = acl->len;
4479out:
4480 spin_unlock(&inode->i_lock);
4481 return ret;
4482}
4483
5794d21e 4484static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4485{
4486 struct nfs4_cached_acl *acl;
b291f1b1 4487 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4488
1f1ea6c2 4489 if (buflen <= PAGE_SIZE) {
b291f1b1 4490 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4491 if (acl == NULL)
4492 goto out;
4493 acl->cached = 1;
5794d21e 4494 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4495 } else {
4496 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4497 if (acl == NULL)
4498 goto out;
4499 acl->cached = 0;
4500 }
4501 acl->len = acl_len;
4502out:
4503 nfs4_set_cached_acl(inode, acl);
4504}
4505
bf118a34
AA		 4506/*
4507 * The getxattr API returns the required buffer length when called with a
4508 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4509 * the required buf. On a NULL buf, we send a page of data to the server
4510 * guessing that the ACL request can be serviced by a page. If so, we cache
4511 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4512 * the cache. If not so, we throw away the page, and cache the required
4513 * length. The next getxattr call will then produce another round trip to
4514 * the server, this time with the input buf of the required size.
4515 */
16b4289c 4516static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4517{
bf118a34 4518 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4519 struct nfs_getaclargs args = {
4520 .fh = NFS_FH(inode),
4521 .acl_pages = pages,
4522 .acl_len = buflen,
4523 };
663c79b3
BH		 4524 struct nfs_getaclres res = {
4525 .acl_len = buflen,
4526 };
aa1870af
BF		 4527 struct rpc_message msg = {
4528 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4529 .rpc_argp = &args,
663c79b3 4530 .rpc_resp = &res,
aa1870af 4531 };
21f498c2
TM		 4532 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4533 int ret = -ENOMEM, i;
aa1870af 4534
bf118a34
AA		 4535 /* As long as we're doing a round trip to the server anyway,
4536 * let's be prepared for a page of acl data. */
4537 if (npages == 0)
4538 npages = 1;
21f498c2
TM		 4539 if (npages > ARRAY_SIZE(pages))
4540 return -ERANGE;
5a006899 4541
bf118a34
AA		 4542 for (i = 0; i < npages; i++) {
4543 pages[i] = alloc_page(GFP_KERNEL);
4544 if (!pages[i])
4545 goto out_free;
e50a1c2e 4546 }
5a006899
SP		 4547
4548 /* for decoding across pages */
4549 res.acl_scratch = alloc_page(GFP_KERNEL);
4550 if (!res.acl_scratch)
4551 goto out_free;
4552
bf118a34
AA		 4553 args.acl_len = npages * PAGE_SIZE;
4554 args.acl_pgbase = 0;
5a006899 4555
de040bec 4556 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4557 __func__, buf, buflen, npages, args.acl_len);
4558 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4559 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4560 if (ret)
4561 goto out_free;
bf118a34 4562
1f1ea6c2
TM		 4563 /* Handle the case where the passed-in buffer is too short */
4564 if (res.acl_flags & NFS4_ACL_TRUNC) {
4565 /* Did the user only issue a request for the acl length? */
4566 if (buf == NULL)
4567 goto out_ok;
e50a1c2e 4568 ret = -ERANGE;
1f1ea6c2 4569 goto out_free;
e50a1c2e 4570 }
1f1ea6c2 4571 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4572 if (buf) {
4573 if (res.acl_len > buflen) {
4574 ret = -ERANGE;
4575 goto out_free;
4576 }
1f1ea6c2 4577 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4578 }
1f1ea6c2
TM		 4579out_ok:
4580 ret = res.acl_len;
e50a1c2e 4581out_free:
bf118a34
AA		 4582 for (i = 0; i < npages; i++)
4583 if (pages[i])
4584 __free_page(pages[i]);
331818f1
TM		 4585 if (res.acl_scratch)
4586 __free_page(res.acl_scratch);
aa1870af
BF		 4587 return ret;
4588}
4589
16b4289c
TM		 4590static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4591{
4592 struct nfs4_exception exception = { };
4593 ssize_t ret;
4594 do {
4595 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4596 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4597 if (ret >= 0)
4598 break;
4599 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4600 } while (exception.retry);
4601 return ret;
4602}
4603
e50a1c2e
BF		 4604static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4605{
4606 struct nfs_server *server = NFS_SERVER(inode);
4607 int ret;
4608
4609 if (!nfs4_server_supports_acls(server))
4610 return -EOPNOTSUPP;
4611 ret = nfs_revalidate_inode(server, inode);
4612 if (ret < 0)
4613 return ret;
08a22b39
AK		 4614 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4615 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4616 ret = nfs4_read_cached_acl(inode, buf, buflen);
4617 if (ret != -ENOENT)
bf118a34
AA		 4618 /* -ENOENT is returned if there is no ACL or if there is an ACL
4619 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4620 return ret;
4621 return nfs4_get_acl_uncached(inode, buf, buflen);
4622}
4623
16b4289c 4624static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4625{
4626 struct nfs_server *server = NFS_SERVER(inode);
4627 struct page *pages[NFS4ACL_MAXPAGES];
4628 struct nfs_setaclargs arg = {
4629 .fh = NFS_FH(inode),
4630 .acl_pages = pages,
4631 .acl_len = buflen,
4632 };
73c403a9 4633 struct nfs_setaclres res;
4b580ee3
BF		 4634 struct rpc_message msg = {
4635 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4636 .rpc_argp = &arg,
73c403a9 4637 .rpc_resp = &res,
4b580ee3 4638 };
21f498c2 4639 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4640 int ret, i;
4b580ee3
BF		 4641
4642 if (!nfs4_server_supports_acls(server))
4643 return -EOPNOTSUPP;
21f498c2
TM		 4644 if (npages > ARRAY_SIZE(pages))
4645 return -ERANGE;
e9e3d724
NH		 4646 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4647 if (i < 0)
4648 return i;
57ec14c5 4649 nfs4_inode_return_delegation(inode);
7c513058 4650 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4651
4652 /*
4653 * Free each page after tx, so the only ref left is
4654 * held by the network stack
4655 */
4656 for (; i > 0; i--)
4657 put_page(pages[i-1]);
4658
08a22b39
AK		 4659 /*
4660 * Acl update can result in inode attribute update.
4661 * so mark the attribute cache invalid.
4662 */
4663 spin_lock(&inode->i_lock);
4664 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4665 spin_unlock(&inode->i_lock);
f41f7418
TM		 4666 nfs_access_zap_cache(inode);
4667 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4668 return ret;
4669}
4670
16b4289c
TM		 4671static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4672{
4673 struct nfs4_exception exception = { };
4674 int err;
4675 do {
c1578b76
TM		 4676 err = __nfs4_proc_set_acl(inode, buf, buflen);
4677 trace_nfs4_set_acl(inode, err);
4678 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4679 &exception);
4680 } while (exception.retry);
4681 return err;
4682}
4683
aa9c2669
DQ		 4684#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4685static int _nfs4_get_security_label(struct inode *inode, void *buf,
4686 size_t buflen)
4687{
4688 struct nfs_server *server = NFS_SERVER(inode);
4689 struct nfs_fattr fattr;
4690 struct nfs4_label label = {0, 0, buflen, buf};
4691
4692 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4693 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4694 .fh = NFS_FH(inode),
4695 .bitmask = bitmask,
4696 };
4697 struct nfs4_getattr_res res = {
4698 .fattr = &fattr,
4699 .label = &label,
4700 .server = server,
4701 };
4702 struct rpc_message msg = {
4703 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4704 .rpc_argp = &arg,
aa9c2669
DQ		 4705 .rpc_resp = &res,
4706 };
4707 int ret;
4708
4709 nfs_fattr_init(&fattr);
4710
fcb63a9b 4711 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4712 if (ret)
4713 return ret;
4714 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4715 return -ENOENT;
4716 if (buflen < label.len)
4717 return -ERANGE;
4718 return 0;
4719}
4720
4721static int nfs4_get_security_label(struct inode *inode, void *buf,
4722 size_t buflen)
4723{
4724 struct nfs4_exception exception = { };
4725 int err;
4726
4727 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4728 return -EOPNOTSUPP;
4729
4730 do {
c1578b76
TM		 4731 err = _nfs4_get_security_label(inode, buf, buflen);
4732 trace_nfs4_get_security_label(inode, err);
4733 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4734 &exception);
4735 } while (exception.retry);
4736 return err;
4737}
4738
4739static int _nfs4_do_set_security_label(struct inode *inode,
4740 struct nfs4_label *ilabel,
4741 struct nfs_fattr *fattr,
4742 struct nfs4_label *olabel)
4743{
4744
4745 struct iattr sattr = {0};
4746 struct nfs_server *server = NFS_SERVER(inode);
4747 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4748 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4749 .fh = NFS_FH(inode),
4750 .iap = &sattr,
4751 .server = server,
4752 .bitmask = bitmask,
4753 .label = ilabel,
4754 };
4755 struct nfs_setattrres res = {
4756 .fattr = fattr,
4757 .label = olabel,
4758 .server = server,
4759 };
4760 struct rpc_message msg = {
4761 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4762 .rpc_argp = &arg,
aa9c2669
DQ		 4763 .rpc_resp = &res,
4764 };
4765 int status;
4766
12207f69 4767 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4768
12207f69 4769 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4770 if (status)
4771 dprintk("%s failed: %d\n", __func__, status);
4772
4773 return status;
4774}
4775
4776static int nfs4_do_set_security_label(struct inode *inode,
4777 struct nfs4_label *ilabel,
4778 struct nfs_fattr *fattr,
4779 struct nfs4_label *olabel)
4780{
4781 struct nfs4_exception exception = { };
4782 int err;
4783
4784 do {
c1578b76
TM		 4785 err = _nfs4_do_set_security_label(inode, ilabel,
4786 fattr, olabel);
4787 trace_nfs4_set_security_label(inode, err);
4788 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4789 &exception);
4790 } while (exception.retry);
4791 return err;
4792}
4793
4794static int
4795nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4796{
4797 struct nfs4_label ilabel, *olabel = NULL;
4798 struct nfs_fattr fattr;
4799 struct rpc_cred *cred;
4800 struct inode *inode = dentry->d_inode;
4801 int status;
4802
4803 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4804 return -EOPNOTSUPP;
4805
4806 nfs_fattr_init(&fattr);
4807
4808 ilabel.pi = 0;
4809 ilabel.lfs = 0;
4810 ilabel.label = (char *)buf;
4811 ilabel.len = buflen;
4812
4813 cred = rpc_lookup_cred();
4814 if (IS_ERR(cred))
4815 return PTR_ERR(cred);
4816
4817 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4818 if (IS_ERR(olabel)) {
4819 status = -PTR_ERR(olabel);
4820 goto out;
4821 }
4822
4823 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4824 if (status == 0)
4825 nfs_setsecurity(inode, &fattr, olabel);
4826
4827 nfs4_label_free(olabel);
4828out:
4829 put_rpccred(cred);
4830 return status;
4831}
4832#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4833
4834
1da177e4 4835static int
8478eaa1
N		 4836nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4837 struct nfs4_state *state, long *timeout)
1da177e4 4838{
aa5190d0
TM		 4839 struct nfs_client *clp = server->nfs_client;
4840
4841 if (task->tk_status >= 0)
1da177e4
LT		 4842 return 0;
4843 switch(task->tk_status) {
a1d0b5ee 4844 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4845 case -NFS4ERR_ADMIN_REVOKED:
4846 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4847 if (state == NULL)
4848 break;
4849 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4850 case -NFS4ERR_OPENMODE:
4851 if (state == NULL)
4852 break;
5d422301 4853 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4854 goto recovery_failed;
0400a6b0 4855 goto wait_on_recovery;
0ced63d1 4856 case -NFS4ERR_EXPIRED:
5d422301
TM		 4857 if (state != NULL) {
4858 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4859 goto recovery_failed;
5d422301 4860 }
1da177e4 4861 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4862 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4863 nfs4_schedule_lease_recovery(clp);
4864 goto wait_on_recovery;
519ae255
CL		 4865 case -NFS4ERR_MOVED:
4866 if (nfs4_schedule_migration_recovery(server) < 0)
4867 goto recovery_failed;
4868 goto wait_on_recovery;
8ef2f8d4
CL		 4869 case -NFS4ERR_LEASE_MOVED:
4870 nfs4_schedule_lease_moved_recovery(clp);
4871 goto wait_on_recovery;
4745e315
AA		 4872#if defined(CONFIG_NFS_V4_1)
4873 case -NFS4ERR_BADSESSION:
4874 case -NFS4ERR_BADSLOT:
4875 case -NFS4ERR_BAD_HIGH_SLOT:
4876 case -NFS4ERR_DEADSESSION:
4877 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4878 case -NFS4ERR_SEQ_FALSE_RETRY:
4879 case -NFS4ERR_SEQ_MISORDERED:
4880 dprintk("%s ERROR %d, Reset session\n", __func__,
4881 task->tk_status);
9f594791 4882 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4883 goto wait_on_recovery;
4745e315 4884#endif /* CONFIG_NFS_V4_1 */
1da177e4 4885 case -NFS4ERR_DELAY:
aa5190d0 4886 nfs_inc_server_stats(server, NFSIOS_DELAY);
8478eaa1
N		 4887 rpc_delay(task, nfs4_update_delay(timeout));
4888 goto restart_call;
006ea73e 4889 case -NFS4ERR_GRACE:
1da177e4 4890 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4891 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4892 case -NFS4ERR_OLD_STATEID:
f1478c13 4893 goto restart_call;
1da177e4
LT		 4894 }
4895 task->tk_status = nfs4_map_errors(task->tk_status);
4896 return 0;
9f51a78e 4897recovery_failed:
5d422301
TM		 4898 task->tk_status = -EIO;
4899 return 0;
0400a6b0 4900wait_on_recovery:
a2c0b9e2 4901 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4902 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4903 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4904 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4905 goto recovery_failed;
f1478c13 4906restart_call:
a2c0b9e2
TM		 4907 task->tk_status = 0;
4908 return -EAGAIN;
1da177e4
LT		 4909}
4910
f092075d
CL		 4911static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4912 nfs4_verifier *bootverf)
cd93710e
CL		 4913{
4914 __be32 verf[2];
4915
2c820d9a
CL		 4916 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4917 /* An impossible timestamp guarantees this value
4918 * will never match a generated boot time. */
4919 verf[0] = 0;
17f26b12 4920 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4921 } else {
f092075d 4922 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4923 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4924 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4925 }
cd93710e
CL		 4926 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4927}
4928
e984a55a
CL		 4929static unsigned int
4930nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4931 char *buf, size_t len)
4932{
4933 unsigned int result;
4934
4935 rcu_read_lock();
4936 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4937 clp->cl_ipaddr,
4938 rpc_peeraddr2str(clp->cl_rpcclient,
4939 RPC_DISPLAY_ADDR),
4940 rpc_peeraddr2str(clp->cl_rpcclient,
4941 RPC_DISPLAY_PROTO));
4942 rcu_read_unlock();
4943 return result;
4944}
4945
4946static unsigned int
4947nfs4_init_uniform_client_string(const struct nfs_client *clp,
4948 char *buf, size_t len)
4949{
55b59293 4950 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4951
4952 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4953 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4954 clp->rpc_ops->version,
4955 clp->cl_minorversion,
4956 nfs4_client_id_uniquifier,
4957 nodename);
e984a55a
CL		 4958 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4959 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4960 nodename);
e984a55a
CL		 4961}
4962
706cb8db
CL		 4963/*
4964 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
4965 * services. Advertise one based on the address family of the
4966 * clientaddr.
4967 */
4968static unsigned int
4969nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
4970{
4971 if (strchr(clp->cl_ipaddr, ':') != NULL)
4972 return scnprintf(buf, len, "tcp6");
4973 else
4974 return scnprintf(buf, len, "tcp");
4975}
4976
f11b2a1c
JL		 4977static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
4978{
4979 struct nfs4_setclientid *sc = calldata;
4980
4981 if (task->tk_status == 0)
4982 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
4983}
4984
4985static const struct rpc_call_ops nfs4_setclientid_ops = {
4986 .rpc_call_done = nfs4_setclientid_done,
4987};
4988
6bbb4ae8
CL		 4989/**
4990 * nfs4_proc_setclientid - Negotiate client ID
4991 * @clp: state data structure
4992 * @program: RPC program for NFSv4 callback service
4993 * @port: IP port number for NFS4 callback service
4994 * @cred: RPC credential to use for this call
4995 * @res: where to place the result
4996 *
4997 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4998 */
bb8b27e5
TM		 4999int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5000 unsigned short port, struct rpc_cred *cred,
5001 struct nfs4_setclientid_res *res)
1da177e4
LT		 5002{
5003 nfs4_verifier sc_verifier;
5004 struct nfs4_setclientid setclientid = {
5005 .sc_verifier = &sc_verifier,
5006 .sc_prog = program,
f4eecd5d 5007 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 5008 };
5009 struct rpc_message msg = {
5010 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5011 .rpc_argp = &setclientid,
bb8b27e5 5012 .rpc_resp = res,
286d7d6a 5013 .rpc_cred = cred,
1da177e4 5014 };
f11b2a1c
JL		 5015 struct rpc_task *task;
5016 struct rpc_task_setup task_setup_data = {
5017 .rpc_client = clp->cl_rpcclient,
5018 .rpc_message = &msg,
5019 .callback_ops = &nfs4_setclientid_ops,
5020 .callback_data = &setclientid,
5021 .flags = RPC_TASK_TIMEOUT,
5022 };
6bbb4ae8 5023 int status;
1da177e4 5024
de734831 5025 /* nfs_client_id4 */
f092075d 5026 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 5027 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5028 setclientid.sc_name_len =
5029 nfs4_init_uniform_client_string(clp,
5030 setclientid.sc_name,
5031 sizeof(setclientid.sc_name));
5032 else
5033 setclientid.sc_name_len =
5034 nfs4_init_nonuniform_client_string(clp,
5035 setclientid.sc_name,
5036 sizeof(setclientid.sc_name));
de734831 5037 /* cb_client4 */
706cb8db
CL		 5038 setclientid.sc_netid_len =
5039 nfs4_init_callback_netid(clp,
5040 setclientid.sc_netid,
5041 sizeof(setclientid.sc_netid));
de734831 5042 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5043 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5044 clp->cl_ipaddr, port >> 8, port & 255);
5045
6bbb4ae8
CL		 5046 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
5047 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5048 setclientid.sc_name_len, setclientid.sc_name);
f11b2a1c
JL		 5049 task = rpc_run_task(&task_setup_data);
5050 if (IS_ERR(task)) {
5051 status = PTR_ERR(task);
5052 goto out;
5053 }
5054 status = task->tk_status;
5055 if (setclientid.sc_cred) {
5056 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5057 put_rpccred(setclientid.sc_cred);
5058 }
5059 rpc_put_task(task);
5060out:
c6d01c6f 5061 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5062 dprintk("NFS reply setclientid: %d\n", status);
5063 return status;
1da177e4
LT		 5064}
5065
6bbb4ae8
CL		 5066/**
5067 * nfs4_proc_setclientid_confirm - Confirm client ID
5068 * @clp: state data structure
5069 * @res: result of a previous SETCLIENTID
5070 * @cred: RPC credential to use for this call
5071 *
5072 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5073 */
fd954ae1 5074int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5075 struct nfs4_setclientid_res *arg,
5076 struct rpc_cred *cred)
1da177e4 5077{
1da177e4
LT		 5078 struct rpc_message msg = {
5079 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5080 .rpc_argp = arg,
286d7d6a 5081 .rpc_cred = cred,
1da177e4 5082 };
1da177e4
LT		 5083 int status;
5084
6bbb4ae8
CL		 5085 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5086 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5087 clp->cl_clientid);
1bd714f2 5088 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5089 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5090 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5091 return status;
5092}
5093
fe650407
TM		 5094struct nfs4_delegreturndata {
5095 struct nfs4_delegreturnargs args;
fa178f29 5096 struct nfs4_delegreturnres res;
fe650407
TM		 5097 struct nfs_fh fh;
5098 nfs4_stateid stateid;
26e976a8 5099 unsigned long timestamp;
fa178f29 5100 struct nfs_fattr fattr;
fe650407 5101 int rpc_status;
039b756a
PT		 5102 struct inode *inode;
5103 bool roc;
5104 u32 roc_barrier;
fe650407
TM		 5105};
5106
fe650407
TM		 5107static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5108{
5109 struct nfs4_delegreturndata *data = calldata;
938e1010 5110
14516c3a
TM		 5111 if (!nfs4_sequence_done(task, &data->res.seq_res))
5112 return;
938e1010 5113
ca8acf8d 5114 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5115 switch (task->tk_status) {
79708861 5116 case 0:
fa178f29 5117 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5118 case -NFS4ERR_ADMIN_REVOKED:
5119 case -NFS4ERR_DELEG_REVOKED:
5120 case -NFS4ERR_BAD_STATEID:
5121 case -NFS4ERR_OLD_STATEID:
5122 case -NFS4ERR_STALE_STATEID:
5123 case -NFS4ERR_EXPIRED:
5124 task->tk_status = 0;
039b756a
PT		 5125 if (data->roc)
5126 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5127 break;
79708861 5128 default:
8478eaa1
N		 5129 if (nfs4_async_handle_error(task, data->res.server,
5130 NULL, NULL) == -EAGAIN) {
d00c5d43 5131 rpc_restart_call_prepare(task);
79708861
RL		 5132 return;
5133 }
5134 }
5135 data->rpc_status = task->tk_status;
fe650407
TM		 5136}
5137
5138static void nfs4_delegreturn_release(void *calldata)
5139{
039b756a
PT		 5140 struct nfs4_delegreturndata *data = calldata;
5141
5142 if (data->roc)
5143 pnfs_roc_release(data->inode);
fe650407
TM		 5144 kfree(calldata);
5145}
5146
938e1010
AA		 5147static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5148{
5149 struct nfs4_delegreturndata *d_data;
5150
5151 d_data = (struct nfs4_delegreturndata *)data;
5152
039b756a
PT		 5153 if (d_data->roc &&
5154 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5155 return;
5156
d9afbd1b
TM		 5157 nfs4_setup_sequence(d_data->res.server,
5158 &d_data->args.seq_args,
5159 &d_data->res.seq_res,
5160 task);
938e1010 5161}
938e1010 5162
c8d149f3 5163static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5164 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5165 .rpc_call_done = nfs4_delegreturn_done,
5166 .rpc_release = nfs4_delegreturn_release,
5167};
5168
e6f81075 5169static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5170{
5171 struct nfs4_delegreturndata *data;
fa178f29 5172 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5173 struct rpc_task *task;
5138fde0
TM		 5174 struct rpc_message msg = {
5175 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5176 .rpc_cred = cred,
5177 };
c970aa85
TM		 5178 struct rpc_task_setup task_setup_data = {
5179 .rpc_client = server->client,
5138fde0 5180 .rpc_message = &msg,
c970aa85
TM		 5181 .callback_ops = &nfs4_delegreturn_ops,
5182 .flags = RPC_TASK_ASYNC,
5183 };
e6f81075 5184 int status = 0;
fe650407 5185
8535b2be 5186 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5187 if (data == NULL)
5188 return -ENOMEM;
a9c92d6b 5189 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5190 data->args.fhandle = &data->fh;
5191 data->args.stateid = &data->stateid;
9e907fec 5192 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5193 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5194 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5195 data->res.fattr = &data->fattr;
5196 data->res.server = server;
5138fde0 5197 nfs_fattr_init(data->res.fattr);
26e976a8 5198 data->timestamp = jiffies;
fe650407 5199 data->rpc_status = 0;
039b756a
PT		 5200 data->inode = inode;
5201 data->roc = list_empty(&NFS_I(inode)->open_files) ?
5202 pnfs_roc(inode) : false;
fe650407 5203
c970aa85 5204 task_setup_data.callback_data = data;
1174dd1f
TM		 5205 msg.rpc_argp = &data->args;
5206 msg.rpc_resp = &data->res;
c970aa85 5207 task = rpc_run_task(&task_setup_data);
7a1218a2 5208 if (IS_ERR(task))
fe650407 5209 return PTR_ERR(task);
e6f81075
TM		 5210 if (!issync)
5211 goto out;
fe650407 5212 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5213 if (status != 0)
5214 goto out;
5215 status = data->rpc_status;
e144cbcc
TM		 5216 if (status == 0)
5217 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5218 else
5219 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5220out:
e6b3c4db 5221 rpc_put_task(task);
fe650407 5222 return status;
1da177e4
LT		 5223}
5224
e6f81075 5225int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5226{
5227 struct nfs_server *server = NFS_SERVER(inode);
5228 struct nfs4_exception exception = { };
5229 int err;
5230 do {
e6f81075 5231 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5232 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5233 switch (err) {
5234 case -NFS4ERR_STALE_STATEID:
5235 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5236 case 0:
5237 return 0;
5238 }
5239 err = nfs4_handle_exception(server, err, &exception);
5240 } while (exception.retry);
5241 return err;
5242}
5243
5244#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5245#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5246
5247/*
5248 * sleep, with exponential backoff, and retry the LOCK operation.
5249 */
5250static unsigned long
5251nfs4_set_lock_task_retry(unsigned long timeout)
5252{
416ad3c9 5253 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5254 timeout <<= 1;
5255 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5256 return NFS4_LOCK_MAXTIMEOUT;
5257 return timeout;
5258}
5259
1da177e4
LT		 5260static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5261{
5262 struct inode *inode = state->inode;
5263 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5264 struct nfs_client *clp = server->nfs_client;
911d1aaf 5265 struct nfs_lockt_args arg = {
1da177e4 5266 .fh = NFS_FH(inode),
911d1aaf 5267 .fl = request,
1da177e4 5268 };
911d1aaf
TM		 5269 struct nfs_lockt_res res = {
5270 .denied = request,
1da177e4
LT		 5271 };
5272 struct rpc_message msg = {
5273 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5274 .rpc_argp = &arg,
5275 .rpc_resp = &res,
5276 .rpc_cred = state->owner->so_cred,
5277 };
1da177e4
LT		 5278 struct nfs4_lock_state *lsp;
5279 int status;
5280
911d1aaf 5281 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5282 status = nfs4_set_lock_state(state, request);
5283 if (status != 0)
5284 goto out;
5285 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5286 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5287 arg.lock_owner.s_dev = server->s_dev;
7c513058 5288 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5289 switch (status) {
5290 case 0:
5291 request->fl_type = F_UNLCK;
5292 break;
5293 case -NFS4ERR_DENIED:
5294 status = 0;
1da177e4 5295 }
70cc6487 5296 request->fl_ops->fl_release_private(request);
a6f951dd 5297 request->fl_ops = NULL;
8d0a8a9d 5298out:
1da177e4
LT		 5299 return status;
5300}
5301
5302static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5303{
5304 struct nfs4_exception exception = { };
5305 int err;
5306
5307 do {
d1b748a5
TM		 5308 err = _nfs4_proc_getlk(state, cmd, request);
5309 trace_nfs4_get_lock(request, state, cmd, err);
5310 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5311 &exception);
5312 } while (exception.retry);
5313 return err;
5314}
5315
5316static int do_vfs_lock(struct file *file, struct file_lock *fl)
5317{
5318 int res = 0;
5319 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5320 case FL_POSIX:
5321 res = posix_lock_file_wait(file, fl);
5322 break;
5323 case FL_FLOCK:
5324 res = flock_lock_file_wait(file, fl);
5325 break;
5326 default:
5327 BUG();
5328 }
1da177e4
LT		 5329 return res;
5330}
5331
faf5f49c 5332struct nfs4_unlockdata {
911d1aaf
TM		 5333 struct nfs_locku_args arg;
5334 struct nfs_locku_res res;
faf5f49c
TM		 5335 struct nfs4_lock_state *lsp;
5336 struct nfs_open_context *ctx;
911d1aaf
TM		 5337 struct file_lock fl;
5338 const struct nfs_server *server;
26e976a8 5339 unsigned long timestamp;
faf5f49c
TM		 5340};
5341
911d1aaf
TM		 5342static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5343 struct nfs_open_context *ctx,
5344 struct nfs4_lock_state *lsp,
5345 struct nfs_seqid *seqid)
5346{
5347 struct nfs4_unlockdata *p;
5348 struct inode *inode = lsp->ls_state->inode;
5349
8535b2be 5350 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5351 if (p == NULL)
5352 return NULL;
5353 p->arg.fh = NFS_FH(inode);
5354 p->arg.fl = &p->fl;
5355 p->arg.seqid = seqid;
c1d51931 5356 p->res.seqid = seqid;
911d1aaf
TM		 5357 p->arg.stateid = &lsp->ls_stateid;
5358 p->lsp = lsp;
5359 atomic_inc(&lsp->ls_count);
5360 /* Ensure we don't close file until we're done freeing locks! */
5361 p->ctx = get_nfs_open_context(ctx);
5362 memcpy(&p->fl, fl, sizeof(p->fl));
5363 p->server = NFS_SERVER(inode);
5364 return p;
5365}
5366
06f814a3 5367static void nfs4_locku_release_calldata(void *data)
faf5f49c 5368{
963d8fe5 5369 struct nfs4_unlockdata *calldata = data;
911d1aaf 5370 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5371 nfs4_put_lock_state(calldata->lsp);
5372 put_nfs_open_context(calldata->ctx);
5373 kfree(calldata);
faf5f49c
TM		 5374}
5375
963d8fe5 5376static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5377{
963d8fe5 5378 struct nfs4_unlockdata *calldata = data;
faf5f49c 5379
14516c3a
TM		 5380 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5381 return;
faf5f49c
TM		 5382 switch (task->tk_status) {
5383 case 0:
f597c537
TM		 5384 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5385 &calldata->res.stateid);
26e976a8 5386 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5387 break;
9e33bed5
TM		 5388 case -NFS4ERR_BAD_STATEID:
5389 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5390 case -NFS4ERR_STALE_STATEID:
5391 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5392 break;
5393 default:
8478eaa1
N		 5394 if (nfs4_async_handle_error(task, calldata->server,
5395 NULL, NULL) == -EAGAIN)
d00c5d43 5396 rpc_restart_call_prepare(task);
faf5f49c 5397 }
2b1bc308 5398 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5399}
5400
4ce70ada 5401static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5402{
4ce70ada 5403 struct nfs4_unlockdata *calldata = data;
faf5f49c 5404
911d1aaf 5405 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5406 goto out_wait;
795a88c9 5407 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5408 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5409 goto out_no_action;
faf5f49c 5410 }
26e976a8 5411 calldata->timestamp = jiffies;
035168ab 5412 if (nfs4_setup_sequence(calldata->server,
a893693c 5413 &calldata->arg.seq_args,
2240a9e2
TM		 5414 &calldata->res.seq_res,
5415 task) != 0)
5416 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5417 return;
5418out_no_action:
5419 task->tk_action = NULL;
5420out_wait:
5421 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5422}
5423
963d8fe5 5424static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5425 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5426 .rpc_call_done = nfs4_locku_done,
06f814a3 5427 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5428};
5429
a5d16a4d
TM		 5430static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5431 struct nfs_open_context *ctx,
5432 struct nfs4_lock_state *lsp,
5433 struct nfs_seqid *seqid)
5434{
5435 struct nfs4_unlockdata *data;
5138fde0
TM		 5436 struct rpc_message msg = {
5437 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5438 .rpc_cred = ctx->cred,
5439 };
c970aa85
TM		 5440 struct rpc_task_setup task_setup_data = {
5441 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5442 .rpc_message = &msg,
c970aa85 5443 .callback_ops = &nfs4_locku_ops,
101070ca 5444 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5445 .flags = RPC_TASK_ASYNC,
5446 };
a5d16a4d 5447
fa940720
WAA		 5448 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5449 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5450
137d6aca
FF		 5451 /* Ensure this is an unlock - when canceling a lock, the
5452 * canceled lock is passed in, and it won't be an unlock.
5453 */
5454 fl->fl_type = F_UNLCK;
5455
a5d16a4d
TM		 5456 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5457 if (data == NULL) {
5458 nfs_free_seqid(seqid);
5459 return ERR_PTR(-ENOMEM);
5460 }
5461
a9c92d6b 5462 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5463 msg.rpc_argp = &data->arg;
5464 msg.rpc_resp = &data->res;
c970aa85
TM		 5465 task_setup_data.callback_data = data;
5466 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5467}
5468
faf5f49c
TM		 5469static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5470{
65b62a29
TM		 5471 struct inode *inode = state->inode;
5472 struct nfs4_state_owner *sp = state->owner;
5473 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5474 struct nfs_seqid *seqid;
1da177e4 5475 struct nfs4_lock_state *lsp;
06f814a3
TM		 5476 struct rpc_task *task;
5477 int status = 0;
536ff0f8 5478 unsigned char fl_flags = request->fl_flags;
faf5f49c 5479
8d0a8a9d 5480 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5481 /* Unlock _before_ we do the RPC call */
5482 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5483 /* Exclude nfs_delegation_claim_locks() */
5484 mutex_lock(&sp->so_delegreturn_mutex);
5485 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5486 down_read(&nfsi->rwsem);
5487 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5488 up_read(&nfsi->rwsem);
65b62a29 5489 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5490 goto out;
19e03c57
TM		 5491 }
5492 up_read(&nfsi->rwsem);
65b62a29 5493 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5494 if (status != 0)
9b073574
TM		 5495 goto out;
5496 /* Is this a delegated lock? */
8d0a8a9d 5497 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5498 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5499 goto out;
8535b2be 5500 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5501 status = -ENOMEM;
911d1aaf 5502 if (seqid == NULL)
9b073574 5503 goto out;
cd3758e3 5504 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5505 status = PTR_ERR(task);
5506 if (IS_ERR(task))
9b073574 5507 goto out;
a5d16a4d 5508 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5509 rpc_put_task(task);
9b073574 5510out:
536ff0f8 5511 request->fl_flags = fl_flags;
d1b748a5 5512 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5513 return status;
5514}
5515
a5d16a4d
TM		 5516struct nfs4_lockdata {
5517 struct nfs_lock_args arg;
5518 struct nfs_lock_res res;
5519 struct nfs4_lock_state *lsp;
5520 struct nfs_open_context *ctx;
5521 struct file_lock fl;
26e976a8 5522 unsigned long timestamp;
a5d16a4d
TM		 5523 int rpc_status;
5524 int cancelled;
66179efe 5525 struct nfs_server *server;
a5d16a4d
TM		 5526};
5527
5528static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5529 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5530 gfp_t gfp_mask)
1da177e4 5531{
a5d16a4d
TM		 5532 struct nfs4_lockdata *p;
5533 struct inode *inode = lsp->ls_state->inode;
1da177e4 5534 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5535
8535b2be 5536 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5537 if (p == NULL)
5538 return NULL;
5539
5540 p->arg.fh = NFS_FH(inode);
5541 p->arg.fl = &p->fl;
8535b2be 5542 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5543 if (p->arg.open_seqid == NULL)
5544 goto out_free;
8535b2be 5545 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5546 if (p->arg.lock_seqid == NULL)
2f74c0a0 5547 goto out_free_seqid;
a5d16a4d 5548 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5549 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5550 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5551 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5552 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5553 p->lsp = lsp;
66179efe 5554 p->server = server;
a5d16a4d
TM		 5555 atomic_inc(&lsp->ls_count);
5556 p->ctx = get_nfs_open_context(ctx);
5557 memcpy(&p->fl, fl, sizeof(p->fl));
5558 return p;
2f74c0a0
TM		 5559out_free_seqid:
5560 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5561out_free:
5562 kfree(p);
5563 return NULL;
5564}
5565
5566static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5567{
5568 struct nfs4_lockdata *data = calldata;
5569 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5570
3110ff80 5571 dprintk("%s: begin!\n", __func__);
2f74c0a0 5572 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5573 goto out_wait;
a5d16a4d
TM		 5574 /* Do we need to do an open_to_lock_owner? */
5575 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5576 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5577 goto out_release_lock_seqid;
8fe72bac 5578 }
8e472f33 5579 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5580 data->arg.new_lock_owner = 1;
c1d51931 5581 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5582 } else
5583 data->arg.new_lock_owner = 0;
5d422301
TM		 5584 if (!nfs4_valid_open_stateid(state)) {
5585 data->rpc_status = -EBADF;
5586 task->tk_action = NULL;
5587 goto out_release_open_seqid;
5588 }
26e976a8 5589 data->timestamp = jiffies;
035168ab
TM		 5590 if (nfs4_setup_sequence(data->server,
5591 &data->arg.seq_args,
2240a9e2 5592 &data->res.seq_res,
d9afbd1b 5593 task) == 0)
66179efe 5594 return;
5d422301 5595out_release_open_seqid:
2240a9e2
TM		 5596 nfs_release_seqid(data->arg.open_seqid);
5597out_release_lock_seqid:
5598 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5599out_wait:
5600 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5601 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5602}
5603
a5d16a4d
TM		 5604static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5605{
5606 struct nfs4_lockdata *data = calldata;
5607
3110ff80 5608 dprintk("%s: begin!\n", __func__);
a5d16a4d 5609
14516c3a
TM		 5610 if (!nfs4_sequence_done(task, &data->res.seq_res))
5611 return;
66179efe 5612
a5d16a4d 5613 data->rpc_status = task->tk_status;
a5d16a4d 5614 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5615 if (data->rpc_status == 0)
5616 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5617 else
5618 goto out;
5619 }
5620 if (data->rpc_status == 0) {
f597c537 5621 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5622 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5623 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5624 }
a5d16a4d 5625out:
3110ff80 5626 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5627}
5628
5629static void nfs4_lock_release(void *calldata)
5630{
5631 struct nfs4_lockdata *data = calldata;
5632
3110ff80 5633 dprintk("%s: begin!\n", __func__);
2f74c0a0 5634 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5635 if (data->cancelled != 0) {
5636 struct rpc_task *task;
5637 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5638 data->arg.lock_seqid);
5639 if (!IS_ERR(task))
bf294b41 5640 rpc_put_task_async(task);
3110ff80 5641 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5642 } else
5643 nfs_free_seqid(data->arg.lock_seqid);
5644 nfs4_put_lock_state(data->lsp);
5645 put_nfs_open_context(data->ctx);
5646 kfree(data);
3110ff80 5647 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5648}
5649
5650static const struct rpc_call_ops nfs4_lock_ops = {
5651 .rpc_call_prepare = nfs4_lock_prepare,
5652 .rpc_call_done = nfs4_lock_done,
5653 .rpc_release = nfs4_lock_release,
5654};
5655
2bee72a6
TM		 5656static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5657{
2bee72a6
TM		 5658 switch (error) {
5659 case -NFS4ERR_ADMIN_REVOKED:
5660 case -NFS4ERR_BAD_STATEID:
ecac799a 5661 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5662 if (new_lock_owner != 0 ||
795a88c9 5663 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5664 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5665 break;
5666 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5667 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5668 case -NFS4ERR_EXPIRED:
5669 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5670 };
5671}
5672
afe6c27c 5673static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5674{
5675 struct nfs4_lockdata *data;
5676 struct rpc_task *task;
5138fde0
TM		 5677 struct rpc_message msg = {
5678 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5679 .rpc_cred = state->owner->so_cred,
5680 };
c970aa85
TM		 5681 struct rpc_task_setup task_setup_data = {
5682 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5683 .rpc_message = &msg,
c970aa85 5684 .callback_ops = &nfs4_lock_ops,
101070ca 5685 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5686 .flags = RPC_TASK_ASYNC,
5687 };
a5d16a4d
TM		 5688 int ret;
5689
3110ff80 5690 dprintk("%s: begin!\n", __func__);
cd3758e3 5691 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5692 fl->fl_u.nfs4_fl.owner,
5693 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5694 if (data == NULL)
5695 return -ENOMEM;
5696 if (IS_SETLKW(cmd))
5697 data->arg.block = 1;
a9c92d6b 5698 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5699 msg.rpc_argp = &data->arg;
5700 msg.rpc_resp = &data->res;
c970aa85 5701 task_setup_data.callback_data = data;
8fe72bac
TM		 5702 if (recovery_type > NFS_LOCK_NEW) {
5703 if (recovery_type == NFS_LOCK_RECLAIM)
5704 data->arg.reclaim = NFS_LOCK_RECLAIM;
5705 nfs4_set_sequence_privileged(&data->arg.seq_args);
5706 }
c970aa85 5707 task = rpc_run_task(&task_setup_data);
7a1218a2 5708 if (IS_ERR(task))
a5d16a4d 5709 return PTR_ERR(task);
a5d16a4d
TM		 5710 ret = nfs4_wait_for_completion_rpc_task(task);
5711 if (ret == 0) {
5712 ret = data->rpc_status;
2bee72a6
TM		 5713 if (ret)
5714 nfs4_handle_setlk_error(data->server, data->lsp,
5715 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5716 } else
5717 data->cancelled = 1;
e6b3c4db 5718 rpc_put_task(task);
3110ff80 5719 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5720 return ret;
1da177e4
LT		 5721}
5722
5723static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5724{
202b50dc 5725 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5726 struct nfs4_exception exception = {
5727 .inode = state->inode,
5728 };
202b50dc
TM		 5729 int err;
5730
5731 do {
42a2d13e
TM		 5732 /* Cache the lock if possible... */
5733 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5734 return 0;
afe6c27c 5735 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5736 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5737 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5738 break;
5739 nfs4_handle_exception(server, err, &exception);
5740 } while (exception.retry);
5741 return err;
1da177e4
LT		 5742}
5743
5744static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5745{
202b50dc 5746 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5747 struct nfs4_exception exception = {
5748 .inode = state->inode,
5749 };
202b50dc
TM		 5750 int err;
5751
6bfc93ef
TM		 5752 err = nfs4_set_lock_state(state, request);
5753 if (err != 0)
5754 return err;
f6de7a39 5755 if (!recover_lost_locks) {
ef1820f9
N		 5756 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5757 return 0;
5758 }
202b50dc 5759 do {
42a2d13e
TM		 5760 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5761 return 0;
afe6c27c 5762 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5763 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5764 switch (err) {
5765 default:
5766 goto out;
5767 case -NFS4ERR_GRACE:
5768 case -NFS4ERR_DELAY:
5769 nfs4_handle_exception(server, err, &exception);
5770 err = 0;
5771 }
202b50dc 5772 } while (exception.retry);
a9ed2e25 5773out:
202b50dc 5774 return err;
1da177e4
LT		 5775}
5776
f062eb6c 5777#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5778/**
5779 * nfs41_check_expired_locks - possibly free a lock stateid
5780 *
5781 * @state: NFSv4 state for an inode
5782 *
5783 * Returns NFS_OK if recovery for this stateid is now finished.
5784 * Otherwise a negative NFS4ERR value is returned.
5785 */
b01dd1d8 5786static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5787{
eb64cf96 5788 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5789 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5790 struct nfs_server *server = NFS_SERVER(state->inode);
5791
b01dd1d8 5792 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5793 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5794 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5795
5796 status = nfs41_test_stateid(server,
5797 &lsp->ls_stateid,
5798 cred);
08cb47fa 5799 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5800 if (status != NFS_OK) {
3e60ffdd
CL		 5801 /* Free the stateid unless the server
5802 * informs us the stateid is unrecognized. */
89af2739
CL		 5803 if (status != -NFS4ERR_BAD_STATEID)
5804 nfs41_free_stateid(server,
ab7cb0df
TM		 5805 &lsp->ls_stateid,
5806 cred);
795a88c9 5807 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5808 ret = status;
5809 }
5810 }
5811 };
5812
5813 return ret;
5814}
5815
5816static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5817{
5818 int status = NFS_OK;
5819
5820 if (test_bit(LK_STATE_IN_USE, &state->flags))
5821 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5822 if (status != NFS_OK)
5823 status = nfs4_lock_expired(state, request);
5824 return status;
f062eb6c
BS		 5825}
5826#endif
5827
1da177e4
LT		 5828static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5829{
9a99af49 5830 struct nfs4_state_owner *sp = state->owner;
19e03c57 5831 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5832 unsigned char fl_flags = request->fl_flags;
9a99af49 5833 unsigned int seq;
8e469ebd 5834 int status = -ENOLCK;
1da177e4 5835
8e469ebd
TM		 5836 if ((fl_flags & FL_POSIX) &&
5837 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5838 goto out;
6bfc93ef 5839 /* Is this a delegated open? */
6bfc93ef
TM		 5840 status = nfs4_set_lock_state(state, request);
5841 if (status != 0)
5842 goto out;
01c3b861
TM		 5843 request->fl_flags |= FL_ACCESS;
5844 status = do_vfs_lock(request->fl_file, request);
5845 if (status < 0)
5846 goto out;
19e03c57 5847 down_read(&nfsi->rwsem);
01c3b861 5848 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5849 /* Yes: cache locks! */
01c3b861 5850 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5851 request->fl_flags = fl_flags & ~FL_SLEEP;
5852 status = do_vfs_lock(request->fl_file, request);
5853 goto out_unlock;
01c3b861 5854 }
9a99af49
TM		 5855 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5856 up_read(&nfsi->rwsem);
afe6c27c 5857 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5858 if (status != 0)
9a99af49
TM		 5859 goto out;
5860 down_read(&nfsi->rwsem);
5861 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5862 status = -NFS4ERR_DELAY;
01c3b861 5863 goto out_unlock;
9a99af49 5864 }
6bfc93ef 5865 /* Note: we always want to sleep here! */
01c3b861 5866 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5867 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5868 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5869 "manager!\n", __func__);
01c3b861 5870out_unlock:
19e03c57 5871 up_read(&nfsi->rwsem);
01c3b861
TM		 5872out:
5873 request->fl_flags = fl_flags;
1da177e4
LT		 5874 return status;
5875}
5876
5877static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5878{
a1d0b5ee
TM		 5879 struct nfs4_exception exception = {
5880 .state = state,
05ffe24f 5881 .inode = state->inode,
a1d0b5ee 5882 };
1da177e4
LT		 5883 int err;
5884
5885 do {
965b5d67 5886 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5887 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5888 if (err == -NFS4ERR_DENIED)
5889 err = -EAGAIN;
1da177e4 5890 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5891 err, &exception);
1da177e4
LT		 5892 } while (exception.retry);
5893 return err;
5894}
5895
5896static int
5897nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5898{
5899 struct nfs_open_context *ctx;
5900 struct nfs4_state *state;
5901 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5902 int status;
5903
5904 /* verify open state */
cd3758e3 5905 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5906 state = ctx->state;
5907
5908 if (request->fl_start < 0 || request->fl_end < 0)
5909 return -EINVAL;
5910
d953126a
TM		 5911 if (IS_GETLK(cmd)) {
5912 if (state != NULL)
5913 return nfs4_proc_getlk(state, F_GETLK, request);
5914 return 0;
5915 }
1da177e4
LT		 5916
5917 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5918 return -EINVAL;
5919
d953126a
TM		 5920 if (request->fl_type == F_UNLCK) {
5921 if (state != NULL)
5922 return nfs4_proc_unlck(state, cmd, request);
5923 return 0;
5924 }
1da177e4 5925
d953126a
TM		 5926 if (state == NULL)
5927 return -ENOLCK;
55725513
TM		 5928 /*
5929 * Don't rely on the VFS having checked the file open mode,
5930 * since it won't do this for flock() locks.
5931 */
f44106e2 5932 switch (request->fl_type) {
55725513
TM		 5933 case F_RDLCK:
5934 if (!(filp->f_mode & FMODE_READ))
5935 return -EBADF;
5936 break;
5937 case F_WRLCK:
5938 if (!(filp->f_mode & FMODE_WRITE))
5939 return -EBADF;
5940 }
5941
1da177e4
LT		 5942 do {
5943 status = nfs4_proc_setlk(state, cmd, request);
5944 if ((status != -EAGAIN) || IS_SETLK(cmd))
5945 break;
5946 timeout = nfs4_set_lock_task_retry(timeout);
5947 status = -ERESTARTSYS;
5948 if (signalled())
5949 break;
5950 } while(status < 0);
1da177e4
LT		 5951 return status;
5952}
5953
db4f2e63 5954int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5955{
5956 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5957 int err;
5958
5959 err = nfs4_set_lock_state(state, fl);
5960 if (err != 0)
db4f2e63 5961 return err;
4a706fa0 5962 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5963 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5964}
6b3b5496 5965
cf470c3e
TM		 5966struct nfs_release_lockowner_data {
5967 struct nfs4_lock_state *lsp;
5ae67c4f 5968 struct nfs_server *server;
cf470c3e 5969 struct nfs_release_lockowner_args args;
b7e63a10 5970 struct nfs_release_lockowner_res res;
60ea6812 5971 unsigned long timestamp;
cf470c3e
TM		 5972};
5973
fbd4bfd1
CL		 5974static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5975{
5976 struct nfs_release_lockowner_data *data = calldata;
5b53dc88
KM		 5977 struct nfs_server *server = data->server;
5978 nfs40_setup_sequence(server, &data->args.seq_args,
5979 &data->res.seq_res, task);
5980 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 5981 data->timestamp = jiffies;
fbd4bfd1
CL		 5982}
5983
5984static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5985{
5986 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 5987 struct nfs_server *server = data->server;
5988
b7e63a10 5989 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 5990
5991 switch (task->tk_status) {
5992 case 0:
5993 renew_lease(server, data->timestamp);
5994 break;
5995 case -NFS4ERR_STALE_CLIENTID:
5996 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 5997 nfs4_schedule_lease_recovery(server->nfs_client);
5998 break;
60ea6812
CL		 5999 case -NFS4ERR_LEASE_MOVED:
6000 case -NFS4ERR_DELAY:
8478eaa1
N		 6001 if (nfs4_async_handle_error(task, server,
6002 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6003 rpc_restart_call_prepare(task);
6004 }
fbd4bfd1
CL		 6005}
6006
d3c7b7cc
TM		 6007static void nfs4_release_lockowner_release(void *calldata)
6008{
cf470c3e 6009 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6010 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6011 kfree(calldata);
6012}
6013
17280175 6014static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6015 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6016 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6017 .rpc_release = nfs4_release_lockowner_release,
6018};
6019
f1cdae87
JL		 6020static void
6021nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6022{
cf470c3e 6023 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6024 struct rpc_message msg = {
6025 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6026 };
6027
6028 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6029 return;
fbd4bfd1 6030
cf470c3e
TM		 6031 data = kmalloc(sizeof(*data), GFP_NOFS);
6032 if (!data)
f1cdae87 6033 return;
cf470c3e 6034 data->lsp = lsp;
5ae67c4f 6035 data->server = server;
cf470c3e
TM		 6036 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6037 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6038 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6039
cf470c3e 6040 msg.rpc_argp = &data->args;
b7e63a10
TM		 6041 msg.rpc_resp = &data->res;
6042 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6043 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6044}
6045
aa1870af
BF		 6046#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6047
64c2ce8b
AK		 6048static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6049 const void *buf, size_t buflen,
6050 int flags, int type)
6b3b5496 6051{
64c2ce8b
AK		 6052 if (strcmp(key, "") != 0)
6053 return -EINVAL;
4b580ee3 6054
64c2ce8b 6055 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6056}
6057
64c2ce8b
AK		 6058static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6059 void *buf, size_t buflen, int type)
6b3b5496 6060{
64c2ce8b
AK		 6061 if (strcmp(key, "") != 0)
6062 return -EINVAL;
aa1870af 6063
64c2ce8b 6064 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6065}
6066
64c2ce8b
AK		 6067static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6068 size_t list_len, const char *name,
6069 size_t name_len, int type)
6b3b5496 6070{
64c2ce8b 6071 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6072
096455a2
BF		 6073 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
6074 return 0;
64c2ce8b
AK		 6075
6076 if (list && len <= list_len)
6077 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6078 return len;
6b3b5496
BF		 6079}
6080
c9bccef6
DQ		 6081#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6082static inline int nfs4_server_supports_labels(struct nfs_server *server)
6083{
6084 return server->caps & NFS_CAP_SECURITY_LABEL;
6085}
6086
6087static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6088 const void *buf, size_t buflen,
6089 int flags, int type)
6090{
6091 if (security_ismaclabel(key))
6092 return nfs4_set_security_label(dentry, buf, buflen);
6093
6094 return -EOPNOTSUPP;
6095}
6096
6097static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6098 void *buf, size_t buflen, int type)
6099{
6100 if (security_ismaclabel(key))
6101 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
6102 return -EOPNOTSUPP;
6103}
6104
6105static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6106 size_t list_len, const char *name,
6107 size_t name_len, int type)
6108{
6109 size_t len = 0;
6110
6111 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
6112 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
6113 if (list && len <= list_len)
6114 security_inode_listsecurity(dentry->d_inode, list, len);
6115 }
6116 return len;
6117}
6118
6119static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6120 .prefix = XATTR_SECURITY_PREFIX,
6121 .list = nfs4_xattr_list_nfs4_label,
6122 .get = nfs4_xattr_get_nfs4_label,
6123 .set = nfs4_xattr_set_nfs4_label,
6124};
6125#endif
6126
6127
533eb461
AA		 6128/*
6129 * nfs_fhget will use either the mounted_on_fileid or the fileid
6130 */
69aaaae1
TM		 6131static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6132{
533eb461
AA		 6133 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6134 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6135 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6136 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6137 return;
6138
6139 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6140 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6141 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6142 fattr->nlink = 2;
6143}
6144
f05d147f
BS		 6145static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6146 const struct qstr *name,
6147 struct nfs4_fs_locations *fs_locations,
6148 struct page *page)
683b57b4
TM		 6149{
6150 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6151 u32 bitmask[3] = {
361e624f 6152 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6153 };
6154 struct nfs4_fs_locations_arg args = {
6155 .dir_fh = NFS_FH(dir),
c228fd3a 6156 .name = name,
683b57b4
TM		 6157 .page = page,
6158 .bitmask = bitmask,
6159 };
22958463
BH		 6160 struct nfs4_fs_locations_res res = {
6161 .fs_locations = fs_locations,
6162 };
683b57b4
TM		 6163 struct rpc_message msg = {
6164 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6165 .rpc_argp = &args,
22958463 6166 .rpc_resp = &res,
683b57b4
TM		 6167 };
6168 int status;
6169
3110ff80 6170 dprintk("%s: start\n", __func__);
533eb461
AA		 6171
6172 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6173 * is not supported */
6174 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6175 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6176 else
6177 bitmask[0] |= FATTR4_WORD0_FILEID;
6178
c228fd3a 6179 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6180 fs_locations->server = server;
830b8e33 6181 fs_locations->nlocations = 0;
f05d147f 6182 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6183 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6184 return status;
6185}
6186
f05d147f
BS		 6187int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6188 const struct qstr *name,
6189 struct nfs4_fs_locations *fs_locations,
6190 struct page *page)
db0a9593
BS		 6191{
6192 struct nfs4_exception exception = { };
6193 int err;
6194 do {
078ea3df
TM		 6195 err = _nfs4_proc_fs_locations(client, dir, name,
6196 fs_locations, page);
6197 trace_nfs4_get_fs_locations(dir, name, err);
6198 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6199 &exception);
6200 } while (exception.retry);
6201 return err;
6202}
6203
b03d735b
CL		 6204/*
6205 * This operation also signals the server that this client is
6206 * performing migration recovery. The server can stop returning
6207 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6208 * appended to this compound to identify the client ID which is
6209 * performing recovery.
6210 */
6211static int _nfs40_proc_get_locations(struct inode *inode,
6212 struct nfs4_fs_locations *locations,
6213 struct page *page, struct rpc_cred *cred)
6214{
6215 struct nfs_server *server = NFS_SERVER(inode);
6216 struct rpc_clnt *clnt = server->client;
6217 u32 bitmask[2] = {
6218 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6219 };
6220 struct nfs4_fs_locations_arg args = {
6221 .clientid = server->nfs_client->cl_clientid,
6222 .fh = NFS_FH(inode),
6223 .page = page,
6224 .bitmask = bitmask,
6225 .migration = 1, /* skip LOOKUP */
6226 .renew = 1, /* append RENEW */
6227 };
6228 struct nfs4_fs_locations_res res = {
6229 .fs_locations = locations,
6230 .migration = 1,
6231 .renew = 1,
6232 };
6233 struct rpc_message msg = {
6234 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6235 .rpc_argp = &args,
6236 .rpc_resp = &res,
6237 .rpc_cred = cred,
6238 };
6239 unsigned long now = jiffies;
6240 int status;
6241
6242 nfs_fattr_init(&locations->fattr);
6243 locations->server = server;
6244 locations->nlocations = 0;
6245
6246 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6247 nfs4_set_sequence_privileged(&args.seq_args);
6248 status = nfs4_call_sync_sequence(clnt, server, &msg,
6249 &args.seq_args, &res.seq_res);
6250 if (status)
6251 return status;
6252
6253 renew_lease(server, now);
6254 return 0;
6255}
6256
6257#ifdef CONFIG_NFS_V4_1
6258
6259/*
6260 * This operation also signals the server that this client is
6261 * performing migration recovery. The server can stop asserting
6262 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6263 * performing this operation is identified in the SEQUENCE
6264 * operation in this compound.
6265 *
6266 * When the client supports GETATTR(fs_locations_info), it can
6267 * be plumbed in here.
6268 */
6269static int _nfs41_proc_get_locations(struct inode *inode,
6270 struct nfs4_fs_locations *locations,
6271 struct page *page, struct rpc_cred *cred)
6272{
6273 struct nfs_server *server = NFS_SERVER(inode);
6274 struct rpc_clnt *clnt = server->client;
6275 u32 bitmask[2] = {
6276 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6277 };
6278 struct nfs4_fs_locations_arg args = {
6279 .fh = NFS_FH(inode),
6280 .page = page,
6281 .bitmask = bitmask,
6282 .migration = 1, /* skip LOOKUP */
6283 };
6284 struct nfs4_fs_locations_res res = {
6285 .fs_locations = locations,
6286 .migration = 1,
6287 };
6288 struct rpc_message msg = {
6289 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6290 .rpc_argp = &args,
6291 .rpc_resp = &res,
6292 .rpc_cred = cred,
6293 };
6294 int status;
6295
6296 nfs_fattr_init(&locations->fattr);
6297 locations->server = server;
6298 locations->nlocations = 0;
6299
6300 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6301 nfs4_set_sequence_privileged(&args.seq_args);
6302 status = nfs4_call_sync_sequence(clnt, server, &msg,
6303 &args.seq_args, &res.seq_res);
6304 if (status == NFS4_OK &&
6305 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6306 status = -NFS4ERR_LEASE_MOVED;
6307 return status;
6308}
6309
6310#endif /* CONFIG_NFS_V4_1 */
6311
6312/**
6313 * nfs4_proc_get_locations - discover locations for a migrated FSID
6314 * @inode: inode on FSID that is migrating
6315 * @locations: result of query
6316 * @page: buffer
6317 * @cred: credential to use for this operation
6318 *
6319 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6320 * operation failed, or a negative errno if a local error occurred.
6321 *
6322 * On success, "locations" is filled in, but if the server has
6323 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6324 * asserted.
6325 *
6326 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6327 * from this client that require migration recovery.
6328 */
6329int nfs4_proc_get_locations(struct inode *inode,
6330 struct nfs4_fs_locations *locations,
6331 struct page *page, struct rpc_cred *cred)
6332{
6333 struct nfs_server *server = NFS_SERVER(inode);
6334 struct nfs_client *clp = server->nfs_client;
6335 const struct nfs4_mig_recovery_ops *ops =
6336 clp->cl_mvops->mig_recovery_ops;
6337 struct nfs4_exception exception = { };
6338 int status;
6339
6340 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6341 (unsigned long long)server->fsid.major,
6342 (unsigned long long)server->fsid.minor,
6343 clp->cl_hostname);
6344 nfs_display_fhandle(NFS_FH(inode), __func__);
6345
6346 do {
6347 status = ops->get_locations(inode, locations, page, cred);
6348 if (status != -NFS4ERR_DELAY)
6349 break;
6350 nfs4_handle_exception(server, status, &exception);
6351 } while (exception.retry);
6352 return status;
6353}
6354
44c99933
CL		 6355/*
6356 * This operation also signals the server that this client is
6357 * performing "lease moved" recovery. The server can stop
6358 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6359 * is appended to this compound to identify the client ID which is
6360 * performing recovery.
6361 */
6362static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6363{
6364 struct nfs_server *server = NFS_SERVER(inode);
6365 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6366 struct rpc_clnt *clnt = server->client;
6367 struct nfs4_fsid_present_arg args = {
6368 .fh = NFS_FH(inode),
6369 .clientid = clp->cl_clientid,
6370 .renew = 1, /* append RENEW */
6371 };
6372 struct nfs4_fsid_present_res res = {
6373 .renew = 1,
6374 };
6375 struct rpc_message msg = {
6376 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6377 .rpc_argp = &args,
6378 .rpc_resp = &res,
6379 .rpc_cred = cred,
6380 };
6381 unsigned long now = jiffies;
6382 int status;
6383
6384 res.fh = nfs_alloc_fhandle();
6385 if (res.fh == NULL)
6386 return -ENOMEM;
6387
6388 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6389 nfs4_set_sequence_privileged(&args.seq_args);
6390 status = nfs4_call_sync_sequence(clnt, server, &msg,
6391 &args.seq_args, &res.seq_res);
6392 nfs_free_fhandle(res.fh);
6393 if (status)
6394 return status;
6395
6396 do_renew_lease(clp, now);
6397 return 0;
6398}
6399
6400#ifdef CONFIG_NFS_V4_1
6401
6402/*
6403 * This operation also signals the server that this client is
6404 * performing "lease moved" recovery. The server can stop asserting
6405 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6406 * this operation is identified in the SEQUENCE operation in this
6407 * compound.
6408 */
6409static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6410{
6411 struct nfs_server *server = NFS_SERVER(inode);
6412 struct rpc_clnt *clnt = server->client;
6413 struct nfs4_fsid_present_arg args = {
6414 .fh = NFS_FH(inode),
6415 };
6416 struct nfs4_fsid_present_res res = {
6417 };
6418 struct rpc_message msg = {
6419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6420 .rpc_argp = &args,
6421 .rpc_resp = &res,
6422 .rpc_cred = cred,
6423 };
6424 int status;
6425
6426 res.fh = nfs_alloc_fhandle();
6427 if (res.fh == NULL)
6428 return -ENOMEM;
6429
6430 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6431 nfs4_set_sequence_privileged(&args.seq_args);
6432 status = nfs4_call_sync_sequence(clnt, server, &msg,
6433 &args.seq_args, &res.seq_res);
6434 nfs_free_fhandle(res.fh);
6435 if (status == NFS4_OK &&
6436 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6437 status = -NFS4ERR_LEASE_MOVED;
6438 return status;
6439}
6440
6441#endif /* CONFIG_NFS_V4_1 */
6442
6443/**
6444 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6445 * @inode: inode on FSID to check
6446 * @cred: credential to use for this operation
6447 *
6448 * Server indicates whether the FSID is present, moved, or not
6449 * recognized. This operation is necessary to clear a LEASE_MOVED
6450 * condition for this client ID.
6451 *
6452 * Returns NFS4_OK if the FSID is present on this server,
6453 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6454 * NFS4ERR code if some error occurred on the server, or a
6455 * negative errno if a local failure occurred.
6456 */
6457int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6458{
6459 struct nfs_server *server = NFS_SERVER(inode);
6460 struct nfs_client *clp = server->nfs_client;
6461 const struct nfs4_mig_recovery_ops *ops =
6462 clp->cl_mvops->mig_recovery_ops;
6463 struct nfs4_exception exception = { };
6464 int status;
6465
6466 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6467 (unsigned long long)server->fsid.major,
6468 (unsigned long long)server->fsid.minor,
6469 clp->cl_hostname);
6470 nfs_display_fhandle(NFS_FH(inode), __func__);
6471
6472 do {
6473 status = ops->fsid_present(inode, cred);
6474 if (status != -NFS4ERR_DELAY)
6475 break;
6476 nfs4_handle_exception(server, status, &exception);
6477 } while (exception.retry);
6478 return status;
6479}
6480
5ec16a85 6481/**
a5250def
WAA		 6482 * If 'use_integrity' is true and the state managment nfs_client
6483 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6484 * and the machine credential as per RFC3530bis and RFC5661 Security
6485 * Considerations sections. Otherwise, just use the user cred with the
6486 * filesystem's rpc_client.
5ec16a85 6487 */
a5250def 6488static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6489{
6490 int status;
6491 struct nfs4_secinfo_arg args = {
6492 .dir_fh = NFS_FH(dir),
6493 .name = name,
6494 };
6495 struct nfs4_secinfo_res res = {
6496 .flavors = flavors,
6497 };
6498 struct rpc_message msg = {
6499 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6500 .rpc_argp = &args,
6501 .rpc_resp = &res,
6502 };
a5250def 6503 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6504 struct rpc_cred *cred = NULL;
a5250def
WAA		 6505
6506 if (use_integrity) {
6507 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6508 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6509 msg.rpc_cred = cred;
a5250def 6510 }
5a5ea0d4
BS		 6511
6512 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6513
6514 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6515 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6516
a5250def
WAA		 6517 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6518 &res.seq_res, 0);
5a5ea0d4 6519 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6520
7cb852df
WAA		 6521 if (cred)
6522 put_rpccred(cred);
a5250def 6523
5a5ea0d4
BS		 6524 return status;
6525}
6526
72de53ec
BS		 6527int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6528 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6529{
6530 struct nfs4_exception exception = { };
6531 int err;
6532 do {
a5250def
WAA		 6533 err = -NFS4ERR_WRONGSEC;
6534
6535 /* try to use integrity protection with machine cred */
6536 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6537 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6538
6539 /*
6540 * if unable to use integrity protection, or SECINFO with
6541 * integrity protection returns NFS4ERR_WRONGSEC (which is
6542 * disallowed by spec, but exists in deployed servers) use
6543 * the current filesystem's rpc_client and the user cred.
6544 */
6545 if (err == -NFS4ERR_WRONGSEC)
6546 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6547
078ea3df
TM		 6548 trace_nfs4_secinfo(dir, name, err);
6549 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6550 &exception);
6551 } while (exception.retry);
6552 return err;
6553}
6554
557134a3 6555#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6556/*
6557 * Check the exchange flags returned by the server for invalid flags, having
6558 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6559 * DS flags set.
6560 */
6561static int nfs4_check_cl_exchange_flags(u32 flags)
6562{
6563 if (flags & ~EXCHGID4_FLAG_MASK_R)
6564 goto out_inval;
6565 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6566 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6567 goto out_inval;
6568 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6569 goto out_inval;
6570 return NFS_OK;
6571out_inval:
6572 return -NFS4ERR_INVAL;
6573}
6574
78fe0f41 6575static bool
79d4e1f0
CL		 6576nfs41_same_server_scope(struct nfs41_server_scope *a,
6577 struct nfs41_server_scope *b)
78fe0f41
WAA		 6578{
6579 if (a->server_scope_sz == b->server_scope_sz &&
6580 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6581 return true;
6582
6583 return false;
6584}
6585
7c44f1ae
WAA		 6586/*
6587 * nfs4_proc_bind_conn_to_session()
6588 *
6589 * The 4.1 client currently uses the same TCP connection for the
6590 * fore and backchannel.
6591 */
2cf047c9 6592int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6593{
6594 int status;
6595 struct nfs41_bind_conn_to_session_res res;
6596 struct rpc_message msg = {
6597 .rpc_proc =
6598 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6599 .rpc_argp = clp,
6600 .rpc_resp = &res,
2cf047c9 6601 .rpc_cred = cred,
7c44f1ae
WAA		 6602 };
6603
6604 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 6605
6606 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6607 if (unlikely(res.session == NULL)) {
6608 status = -ENOMEM;
6609 goto out;
6610 }
6611
6612 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6613 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 6614 if (status == 0) {
6615 if (memcmp(res.session->sess_id.data,
6616 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6617 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6618 status = -EIO;
6619 goto out_session;
6620 }
6621 if (res.dir != NFS4_CDFS4_BOTH) {
6622 dprintk("NFS: %s: Unexpected direction from server\n",
6623 __func__);
6624 status = -EIO;
6625 goto out_session;
6626 }
6627 if (res.use_conn_in_rdma_mode) {
6628 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6629 __func__);
6630 status = -EIO;
6631 goto out_session;
6632 }
6633 }
6634out_session:
6635 kfree(res.session);
6636out:
6637 dprintk("<-- %s status= %d\n", __func__, status);
6638 return status;
6639}
6640
99fe60d0 6641/*
fa940720
WAA		 6642 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6643 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6644 */
6645static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6646 .how = SP4_MACH_CRED,
6647 .enforce.u.words = {
6648 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6649 1 << (OP_EXCHANGE_ID - 32) |
6650 1 << (OP_CREATE_SESSION - 32) |
6651 1 << (OP_DESTROY_SESSION - 32) |
6652 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6653 },
6654 .allow.u.words = {
6655 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6656 1 << (OP_LOCKU) |
6657 1 << (OP_COMMIT),
8b5bee2e 6658 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6659 1 << (OP_SECINFO_NO_NAME - 32) |
6660 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6661 1 << (OP_FREE_STATEID - 32) |
6662 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6663 }
6664};
6665
6666/*
6667 * Select the state protection mode for client `clp' given the server results
6668 * from exchange_id in `sp'.
99fe60d0 6669 *
2031cd1a
WAA		 6670 * Returns 0 on success, negative errno otherwise.
6671 */
6672static int nfs4_sp4_select_mode(struct nfs_client *clp,
6673 struct nfs41_state_protection *sp)
6674{
6675 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6676 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6677 1 << (OP_EXCHANGE_ID - 32) |
6678 1 << (OP_CREATE_SESSION - 32) |
6679 1 << (OP_DESTROY_SESSION - 32) |
6680 1 << (OP_DESTROY_CLIENTID - 32)
6681 };
6682 unsigned int i;
6683
6684 if (sp->how == SP4_MACH_CRED) {
6685 /* Print state protect result */
6686 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6687 for (i = 0; i <= LAST_NFS4_OP; i++) {
6688 if (test_bit(i, sp->enforce.u.longs))
6689 dfprintk(MOUNT, " enforce op %d\n", i);
6690 if (test_bit(i, sp->allow.u.longs))
6691 dfprintk(MOUNT, " allow op %d\n", i);
6692 }
6693
6694 /* make sure nothing is on enforce list that isn't supported */
6695 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6696 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6697 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6698 return -EINVAL;
6699 }
6700 }
6701
6702 /*
6703 * Minimal mode - state operations are allowed to use machine
6704 * credential. Note this already happens by default, so the
6705 * client doesn't have to do anything more than the negotiation.
6706 *
6707 * NOTE: we don't care if EXCHANGE_ID is in the list -
6708 * we're already using the machine cred for exchange_id
6709 * and will never use a different cred.
6710 */
6711 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6712 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6713 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6714 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6715 dfprintk(MOUNT, "sp4_mach_cred:\n");
6716 dfprintk(MOUNT, " minimal mode enabled\n");
6717 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6718 } else {
6719 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6720 return -EINVAL;
6721 }
fa940720
WAA		 6722
6723 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6724 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6725 dfprintk(MOUNT, " cleanup mode enabled\n");
6726 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6727 }
8b5bee2e
WAA		 6728
6729 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6730 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6731 dfprintk(MOUNT, " secinfo mode enabled\n");
6732 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6733 }
3787d506
WAA		 6734
6735 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6736 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6737 dfprintk(MOUNT, " stateid mode enabled\n");
6738 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6739 }
8c21c62c
WAA		 6740
6741 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6742 dfprintk(MOUNT, " write mode enabled\n");
6743 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6744 }
6745
6746 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6747 dfprintk(MOUNT, " commit mode enabled\n");
6748 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6749 }
2031cd1a
WAA		 6750 }
6751
6752 return 0;
6753}
6754
6755/*
6756 * _nfs4_proc_exchange_id()
6bbb4ae8 6757 *
2031cd1a 6758 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6759 */
2031cd1a
WAA		 6760static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6761 u32 sp4_how)
99fe60d0
BH		 6762{
6763 nfs4_verifier verifier;
6764 struct nfs41_exchange_id_args args = {
cd93710e 6765 .verifier = &verifier,
99fe60d0 6766 .client = clp,
cd3fadec 6767#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6768 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6769 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6770 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6771#else
6772 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6773 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6774#endif
99fe60d0
BH		 6775 };
6776 struct nfs41_exchange_id_res res = {
32b01310 6777 0
99fe60d0
BH		 6778 };
6779 int status;
6780 struct rpc_message msg = {
6781 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6782 .rpc_argp = &args,
6783 .rpc_resp = &res,
6784 .rpc_cred = cred,
6785 };
99fe60d0 6786
f092075d 6787 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6788 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6789 sizeof(args.id));
6bbb4ae8
CL		 6790 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6791 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6792 args.id_len, args.id);
99fe60d0 6793
acdeb69d 6794 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6795 GFP_NOFS);
acdeb69d 6796 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6797 status = -ENOMEM;
6798 goto out;
6799 }
78fe0f41 6800
79d4e1f0 6801 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6802 GFP_NOFS);
177313f1 6803 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6804 status = -ENOMEM;
acdeb69d 6805 goto out_server_owner;
abe9a6d5 6806 }
78fe0f41 6807
bbafffd2 6808 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6809 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6810 status = -ENOMEM;
6811 goto out_server_scope;
6812 }
6813
2031cd1a
WAA		 6814 switch (sp4_how) {
6815 case SP4_NONE:
6816 args.state_protect.how = SP4_NONE;
6817 break;
6818
6819 case SP4_MACH_CRED:
6820 args.state_protect = nfs4_sp4_mach_cred_request;
6821 break;
6822
6823 default:
6824 /* unsupported! */
6825 WARN_ON_ONCE(1);
6826 status = -EINVAL;
6827 goto out_server_scope;
6828 }
6829
1bd714f2 6830 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6831 trace_nfs4_exchange_id(clp, status);
177313f1 6832 if (status == 0)
32b01310 6833 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6834
2031cd1a
WAA		 6835 if (status == 0)
6836 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6837
acdeb69d 6838 if (status == 0) {
32b01310
TM		 6839 clp->cl_clientid = res.clientid;
6840 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6841 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6842 clp->cl_seqid = res.seqid;
6843
acdeb69d
CL		 6844 kfree(clp->cl_serverowner);
6845 clp->cl_serverowner = res.server_owner;
6846 res.server_owner = NULL;
78fe0f41 6847
7d2ed9ac 6848 /* use the most recent implementation id */
59155546
CL		 6849 kfree(clp->cl_implid);
6850 clp->cl_implid = res.impl_id;
7d2ed9ac 6851
177313f1 6852 if (clp->cl_serverscope != NULL &&
79d4e1f0 6853 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6854 res.server_scope)) {
6855 dprintk("%s: server_scope mismatch detected\n",
6856 __func__);
6857 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6858 kfree(clp->cl_serverscope);
6859 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6860 }
6861
177313f1 6862 if (clp->cl_serverscope == NULL) {
79d4e1f0 6863 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6864 goto out;
6865 }
32b01310
TM		 6866 } else
6867 kfree(res.impl_id);
7d2ed9ac 6868
acdeb69d
CL		 6869out_server_owner:
6870 kfree(res.server_owner);
7d2ed9ac 6871out_server_scope:
abe9a6d5
WAA		 6872 kfree(res.server_scope);
6873out:
177313f1 6874 if (clp->cl_implid != NULL)
6bbb4ae8 6875 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6876 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6877 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6878 clp->cl_implid->date.seconds,
6879 clp->cl_implid->date.nseconds);
6bbb4ae8 6880 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6881 return status;
6882}
6883
2031cd1a
WAA		 6884/*
6885 * nfs4_proc_exchange_id()
6886 *
6887 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6888 *
6889 * Since the clientid has expired, all compounds using sessions
6890 * associated with the stale clientid will be returning
6891 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6892 * be in some phase of session reset.
6893 *
6894 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6895 */
6896int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6897{
6898 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6899 int status;
6900
6901 /* try SP4_MACH_CRED if krb5i/p */
6902 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6903 authflavor == RPC_AUTH_GSS_KRB5P) {
6904 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6905 if (!status)
6906 return 0;
6907 }
6908
6909 /* try SP4_NONE */
6910 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6911}
6912
66245539
TM		 6913static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6914 struct rpc_cred *cred)
6915{
6916 struct rpc_message msg = {
6917 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6918 .rpc_argp = clp,
6919 .rpc_cred = cred,
6920 };
6921 int status;
6922
6923 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6924 trace_nfs4_destroy_clientid(clp, status);
66245539 6925 if (status)
02c67525 6926 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6927 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6928 return status;
6929}
6930
6931static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6932 struct rpc_cred *cred)
6933{
6934 unsigned int loop;
6935 int ret;
6936
6937 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6938 ret = _nfs4_proc_destroy_clientid(clp, cred);
6939 switch (ret) {
6940 case -NFS4ERR_DELAY:
6941 case -NFS4ERR_CLIENTID_BUSY:
6942 ssleep(1);
6943 break;
6944 default:
6945 return ret;
6946 }
6947 }
6948 return 0;
6949}
6950
6951int nfs4_destroy_clientid(struct nfs_client *clp)
6952{
6953 struct rpc_cred *cred;
6954 int ret = 0;
6955
6956 if (clp->cl_mvops->minor_version < 1)
6957 goto out;
6958 if (clp->cl_exchange_flags == 0)
6959 goto out;
05f4c350
CL		 6960 if (clp->cl_preserve_clid)
6961 goto out;
73d8bde5 6962 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6963 ret = nfs4_proc_destroy_clientid(clp, cred);
6964 if (cred)
6965 put_rpccred(cred);
6966 switch (ret) {
6967 case 0:
6968 case -NFS4ERR_STALE_CLIENTID:
6969 clp->cl_exchange_flags = 0;
6970 }
6971out:
6972 return ret;
6973}
6974
2050f0cc
AA		 6975struct nfs4_get_lease_time_data {
6976 struct nfs4_get_lease_time_args *args;
6977 struct nfs4_get_lease_time_res *res;
6978 struct nfs_client *clp;
6979};
6980
6981static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6982 void *calldata)
6983{
2050f0cc
AA		 6984 struct nfs4_get_lease_time_data *data =
6985 (struct nfs4_get_lease_time_data *)calldata;
6986
6987 dprintk("--> %s\n", __func__);
6988 /* just setup sequence, do not trigger session recovery
6989 since we're invoked within one */
d9afbd1b
TM		 6990 nfs41_setup_sequence(data->clp->cl_session,
6991 &data->args->la_seq_args,
6992 &data->res->lr_seq_res,
6993 task);
2050f0cc
AA		 6994 dprintk("<-- %s\n", __func__);
6995}
6996
6997/*
6998 * Called from nfs4_state_manager thread for session setup, so don't recover
6999 * from sequence operation or clientid errors.
7000 */
7001static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7002{
7003 struct nfs4_get_lease_time_data *data =
7004 (struct nfs4_get_lease_time_data *)calldata;
7005
7006 dprintk("--> %s\n", __func__);
14516c3a
TM		 7007 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7008 return;
2050f0cc
AA		 7009 switch (task->tk_status) {
7010 case -NFS4ERR_DELAY:
7011 case -NFS4ERR_GRACE:
7012 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7013 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7014 task->tk_status = 0;
a8a4ae3a
AA		 7015 /* fall through */
7016 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7017 rpc_restart_call_prepare(task);
2050f0cc
AA		 7018 return;
7019 }
2050f0cc
AA		 7020 dprintk("<-- %s\n", __func__);
7021}
7022
17280175 7023static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7024 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7025 .rpc_call_done = nfs4_get_lease_time_done,
7026};
7027
7028int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7029{
7030 struct rpc_task *task;
7031 struct nfs4_get_lease_time_args args;
7032 struct nfs4_get_lease_time_res res = {
7033 .lr_fsinfo = fsinfo,
7034 };
7035 struct nfs4_get_lease_time_data data = {
7036 .args = &args,
7037 .res = &res,
7038 .clp = clp,
7039 };
7040 struct rpc_message msg = {
7041 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7042 .rpc_argp = &args,
7043 .rpc_resp = &res,
7044 };
7045 struct rpc_task_setup task_setup = {
7046 .rpc_client = clp->cl_rpcclient,
7047 .rpc_message = &msg,
7048 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7049 .callback_data = &data,
7050 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7051 };
7052 int status;
7053
a9c92d6b 7054 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7055 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7056 dprintk("--> %s\n", __func__);
7057 task = rpc_run_task(&task_setup);
7058
7059 if (IS_ERR(task))
7060 status = PTR_ERR(task);
7061 else {
7062 status = task->tk_status;
7063 rpc_put_task(task);
7064 }
7065 dprintk("<-- %s return %d\n", __func__, status);
7066
7067 return status;
7068}
7069
fc931582
AA		 7070/*
7071 * Initialize the values to be used by the client in CREATE_SESSION
7072 * If nfs4_init_session set the fore channel request and response sizes,
7073 * use them.
7074 *
7075 * Set the back channel max_resp_sz_cached to zero to force the client to
7076 * always set csa_cachethis to FALSE because the current implementation
7077 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7078 */
7079static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7080{
18aad3d5
AA		 7081 unsigned int max_rqst_sz, max_resp_sz;
7082
7083 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7084 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7085
fc931582 7086 /* Fore channel attributes */
18aad3d5
AA		 7087 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7088 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7089 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7090 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7091
7092 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7093 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7094 __func__,
7095 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7096 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7097
7098 /* Back channel attributes */
fc931582
AA		 7099 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7100 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7101 args->bc_attrs.max_resp_sz_cached = 0;
7102 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7103 args->bc_attrs.max_reqs = 1;
7104
7105 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7106 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7107 __func__,
7108 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7109 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7110 args->bc_attrs.max_reqs);
7111}
7112
43c2e885 7113static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 7114{
43c2e885
BF		 7115 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7116 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
7117
43c2e885
BF		 7118 if (rcvd->max_resp_sz > sent->max_resp_sz)
7119 return -EINVAL;
7120 /*
7121 * Our requested max_ops is the minimum we need; we're not
7122 * prepared to break up compounds into smaller pieces than that.
7123 * So, no point even trying to continue if the server won't
7124 * cooperate:
7125 */
7126 if (rcvd->max_ops < sent->max_ops)
7127 return -EINVAL;
7128 if (rcvd->max_reqs == 0)
7129 return -EINVAL;
b4b9a0c1
VG		 7130 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7131 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7132 return 0;
8d35301d
AA		 7133}
7134
43c2e885
BF		 7135static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
7136{
7137 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7138 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 7139
43c2e885
BF		 7140 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7141 return -EINVAL;
7142 if (rcvd->max_resp_sz < sent->max_resp_sz)
7143 return -EINVAL;
7144 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7145 return -EINVAL;
7146 /* These would render the backchannel useless: */
b4b9a0c1 7147 if (rcvd->max_ops != sent->max_ops)
43c2e885 7148 return -EINVAL;
b4b9a0c1 7149 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 7150 return -EINVAL;
7151 return 0;
7152}
8d35301d 7153
8d35301d
AA		 7154static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7155 struct nfs4_session *session)
7156{
43c2e885 7157 int ret;
8d35301d 7158
43c2e885
BF		 7159 ret = nfs4_verify_fore_channel_attrs(args, session);
7160 if (ret)
7161 return ret;
7162 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 7163}
7164
848f5bda
TM		 7165static int _nfs4_proc_create_session(struct nfs_client *clp,
7166 struct rpc_cred *cred)
fc931582
AA		 7167{
7168 struct nfs4_session *session = clp->cl_session;
7169 struct nfs41_create_session_args args = {
7170 .client = clp,
7171 .cb_program = NFS4_CALLBACK,
7172 };
7173 struct nfs41_create_session_res res = {
7174 .client = clp,
7175 };
7176 struct rpc_message msg = {
7177 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7178 .rpc_argp = &args,
7179 .rpc_resp = &res,
848f5bda 7180 .rpc_cred = cred,
fc931582
AA		 7181 };
7182 int status;
7183
7184 nfs4_init_channel_attrs(&args);
0f91421e 7185 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7186
1bd714f2 7187 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7188 trace_nfs4_create_session(clp, status);
fc931582 7189
43095d39 7190 if (!status) {
8d35301d
AA		 7191 /* Verify the session's negotiated channel_attrs values */
7192 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 7193 /* Increment the clientid slot sequence id */
7194 clp->cl_seqid++;
7195 }
7196
7197 return status;
7198}
7199
7200/*
7201 * Issues a CREATE_SESSION operation to the server.
7202 * It is the responsibility of the caller to verify the session is
7203 * expired before calling this routine.
7204 */
848f5bda 7205int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7206{
7207 int status;
7208 unsigned *ptr;
fc931582
AA		 7209 struct nfs4_session *session = clp->cl_session;
7210
7211 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7212
848f5bda 7213 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7214 if (status)
7215 goto out;
7216
aacd5537
AA		 7217 /* Init or reset the session slot tables */
7218 status = nfs4_setup_session_slot_tables(session);
7219 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7220 if (status)
7221 goto out;
7222
7223 ptr = (unsigned *)&session->sess_id.data[0];
7224 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7225 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7226out:
7227 dprintk("<-- %s\n", __func__);
7228 return status;
7229}
7230
0f3e66c6
AA		 7231/*
7232 * Issue the over-the-wire RPC DESTROY_SESSION.
7233 * The caller must serialize access to this routine.
7234 */
848f5bda
TM		 7235int nfs4_proc_destroy_session(struct nfs4_session *session,
7236 struct rpc_cred *cred)
0f3e66c6 7237{
848f5bda
TM		 7238 struct rpc_message msg = {
7239 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7240 .rpc_argp = session,
7241 .rpc_cred = cred,
7242 };
0f3e66c6 7243 int status = 0;
0f3e66c6
AA		 7244
7245 dprintk("--> nfs4_proc_destroy_session\n");
7246
7247 /* session is still being setup */
7248 if (session->clp->cl_cons_state != NFS_CS_READY)
7249 return status;
7250
1bd714f2 7251 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7252 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7253
7254 if (status)
08106ac7 7255 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7256 "Session has been destroyed regardless...\n", status);
7257
7258 dprintk("<-- nfs4_proc_destroy_session\n");
7259 return status;
7260}
7261
fc01cea9
AA		 7262/*
7263 * Renew the cl_session lease.
7264 */
d5f8d3fe
TM		 7265struct nfs4_sequence_data {
7266 struct nfs_client *clp;
7267 struct nfs4_sequence_args args;
7268 struct nfs4_sequence_res res;
7269};
7270
dc96aef9
AB		 7271static void nfs41_sequence_release(void *data)
7272{
d5f8d3fe
TM		 7273 struct nfs4_sequence_data *calldata = data;
7274 struct nfs_client *clp = calldata->clp;
dc96aef9 7275
7135840f
AB		 7276 if (atomic_read(&clp->cl_count) > 1)
7277 nfs4_schedule_state_renewal(clp);
7278 nfs_put_client(clp);
d5f8d3fe 7279 kfree(calldata);
dc96aef9
AB		 7280}
7281
aa5190d0
TM		 7282static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7283{
7284 switch(task->tk_status) {
7285 case -NFS4ERR_DELAY:
aa5190d0
TM		 7286 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7287 return -EAGAIN;
7288 default:
0400a6b0 7289 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7290 }
7291 return 0;
7292}
7293
dc96aef9 7294static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7295{
d5f8d3fe
TM		 7296 struct nfs4_sequence_data *calldata = data;
7297 struct nfs_client *clp = calldata->clp;
fc01cea9 7298
14516c3a
TM		 7299 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7300 return;
fc01cea9 7301
c6d01c6f 7302 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7303 if (task->tk_status < 0) {
7304 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7305 if (atomic_read(&clp->cl_count) == 1)
7306 goto out;
fc01cea9 7307
aa5190d0
TM		 7308 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7309 rpc_restart_call_prepare(task);
fc01cea9
AA		 7310 return;
7311 }
7312 }
fc01cea9 7313 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7314out:
fc01cea9
AA		 7315 dprintk("<-- %s\n", __func__);
7316}
7317
7318static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7319{
d5f8d3fe
TM		 7320 struct nfs4_sequence_data *calldata = data;
7321 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7322 struct nfs4_sequence_args *args;
7323 struct nfs4_sequence_res *res;
7324
fc01cea9
AA		 7325 args = task->tk_msg.rpc_argp;
7326 res = task->tk_msg.rpc_resp;
7327
d9afbd1b 7328 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7329}
7330
7331static const struct rpc_call_ops nfs41_sequence_ops = {
7332 .rpc_call_done = nfs41_sequence_call_done,
7333 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7334 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7335};
7336
8fe72bac
TM		 7337static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7338 struct rpc_cred *cred,
7339 bool is_privileged)
fc01cea9 7340{
d5f8d3fe 7341 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7342 struct rpc_message msg = {
7343 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7344 .rpc_cred = cred,
7345 };
71ac6da9
TM		 7346 struct rpc_task_setup task_setup_data = {
7347 .rpc_client = clp->cl_rpcclient,
7348 .rpc_message = &msg,
8fe72bac 7349 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7350 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7351 };
fc01cea9 7352
7135840f 7353 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7354 return ERR_PTR(-EIO);
dfb4f309 7355 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7356 if (calldata == NULL) {
7135840f 7357 nfs_put_client(clp);
71ac6da9 7358 return ERR_PTR(-ENOMEM);
fc01cea9 7359 }
a9c92d6b 7360 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7361 if (is_privileged)
7362 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7363 msg.rpc_argp = &calldata->args;
7364 msg.rpc_resp = &calldata->res;
7365 calldata->clp = clp;
71ac6da9 7366 task_setup_data.callback_data = calldata;
fc01cea9 7367
71ac6da9
TM		 7368 return rpc_run_task(&task_setup_data);
7369}
7370
2f60ea6b 7371static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7372{
7373 struct rpc_task *task;
7374 int ret = 0;
7375
2f60ea6b 7376 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7377 return -EAGAIN;
8fe72bac 7378 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7379 if (IS_ERR(task))
7380 ret = PTR_ERR(task);
7381 else
bf294b41 7382 rpc_put_task_async(task);
71ac6da9
TM		 7383 dprintk("<-- %s status=%d\n", __func__, ret);
7384 return ret;
7385}
7386
7387static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7388{
7389 struct rpc_task *task;
7390 int ret;
7391
8fe72bac 7392 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7393 if (IS_ERR(task)) {
7394 ret = PTR_ERR(task);
7395 goto out;
7396 }
7397 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7398 if (!ret) {
7399 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7400
7401 if (task->tk_status == 0)
7402 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7403 ret = task->tk_status;
b4410c2f 7404 }
71ac6da9
TM		 7405 rpc_put_task(task);
7406out:
7407 dprintk("<-- %s status=%d\n", __func__, ret);
7408 return ret;
fc01cea9
AA		 7409}
7410
fce5c838
RL		 7411struct nfs4_reclaim_complete_data {
7412 struct nfs_client *clp;
7413 struct nfs41_reclaim_complete_args arg;
7414 struct nfs41_reclaim_complete_res res;
7415};
7416
7417static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7418{
7419 struct nfs4_reclaim_complete_data *calldata = data;
7420
d9afbd1b
TM		 7421 nfs41_setup_sequence(calldata->clp->cl_session,
7422 &calldata->arg.seq_args,
7423 &calldata->res.seq_res,
7424 task);
fce5c838
RL		 7425}
7426
aa5190d0
TM		 7427static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7428{
7429 switch(task->tk_status) {
7430 case 0:
7431 case -NFS4ERR_COMPLETE_ALREADY:
7432 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7433 break;
7434 case -NFS4ERR_DELAY:
aa5190d0 7435 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7436 /* fall through */
7437 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7438 return -EAGAIN;
7439 default:
0400a6b0 7440 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7441 }
7442 return 0;
7443}
7444
fce5c838
RL		 7445static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7446{
7447 struct nfs4_reclaim_complete_data *calldata = data;
7448 struct nfs_client *clp = calldata->clp;
7449 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7450
7451 dprintk("--> %s\n", __func__);
14516c3a
TM		 7452 if (!nfs41_sequence_done(task, res))
7453 return;
fce5c838 7454
c6d01c6f 7455 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7456 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7457 rpc_restart_call_prepare(task);
7458 return;
7459 }
fce5c838
RL		 7460 dprintk("<-- %s\n", __func__);
7461}
7462
7463static void nfs4_free_reclaim_complete_data(void *data)
7464{
7465 struct nfs4_reclaim_complete_data *calldata = data;
7466
7467 kfree(calldata);
7468}
7469
7470static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7471 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7472 .rpc_call_done = nfs4_reclaim_complete_done,
7473 .rpc_release = nfs4_free_reclaim_complete_data,
7474};
7475
7476/*
7477 * Issue a global reclaim complete.
7478 */
965e9c23
TM		 7479static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7480 struct rpc_cred *cred)
fce5c838
RL		 7481{
7482 struct nfs4_reclaim_complete_data *calldata;
7483 struct rpc_task *task;
7484 struct rpc_message msg = {
7485 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7486 .rpc_cred = cred,
fce5c838
RL		 7487 };
7488 struct rpc_task_setup task_setup_data = {
7489 .rpc_client = clp->cl_rpcclient,
7490 .rpc_message = &msg,
7491 .callback_ops = &nfs4_reclaim_complete_call_ops,
7492 .flags = RPC_TASK_ASYNC,
7493 };
7494 int status = -ENOMEM;
7495
7496 dprintk("--> %s\n", __func__);
8535b2be 7497 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7498 if (calldata == NULL)
7499 goto out;
7500 calldata->clp = clp;
7501 calldata->arg.one_fs = 0;
fce5c838 7502
a9c92d6b 7503 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7504 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7505 msg.rpc_argp = &calldata->arg;
7506 msg.rpc_resp = &calldata->res;
7507 task_setup_data.callback_data = calldata;
7508 task = rpc_run_task(&task_setup_data);
acf82b85 7509 if (IS_ERR(task)) {
fce5c838 7510 status = PTR_ERR(task);
acf82b85
DC		 7511 goto out;
7512 }
c34c32ea
AA		 7513 status = nfs4_wait_for_completion_rpc_task(task);
7514 if (status == 0)
7515 status = task->tk_status;
fce5c838 7516 rpc_put_task(task);
acf82b85 7517 return 0;
fce5c838
RL		 7518out:
7519 dprintk("<-- %s status=%d\n", __func__, status);
7520 return status;
7521}
b1f69b75
AA		 7522
7523static void
7524nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7525{
7526 struct nfs4_layoutget *lgp = calldata;
c31663d4 7527 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7528 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7529
7530 dprintk("--> %s\n", __func__);
c31663d4
FI		 7531 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7532 * right now covering the LAYOUTGET we are about to send.
7533 * However, that is not so catastrophic, and there seems
7534 * to be no way to prevent it completely.
7535 */
6ba7db34 7536 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7537 &lgp->res.seq_res, task))
b1f69b75 7538 return;
cf7d63f1
FI		 7539 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7540 NFS_I(lgp->args.inode)->layout,
7541 lgp->args.ctx->state)) {
7542 rpc_exit(task, NFS4_OK);
cf7d63f1 7543 }
b1f69b75
AA		 7544}
7545
7546static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7547{
7548 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7549 struct inode *inode = lgp->args.inode;
7550 struct nfs_server *server = NFS_SERVER(inode);
7551 struct pnfs_layout_hdr *lo;
7552 struct nfs4_state *state = NULL;
ed7e5423 7553 unsigned long timeo, now, giveup;
b1f69b75 7554
ed7e5423 7555 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7556
6ba7db34 7557 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7558 goto out;
b1f69b75
AA		 7559
7560 switch (task->tk_status) {
7561 case 0:
ee314c2a 7562 goto out;
ed7e5423
BH		 7563 /*
7564 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7565 * (or clients) writing to the same RAID stripe
7566 */
b1f69b75 7567 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7568 /*
7569 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7570 * existing layout before getting a new one).
7571 */
b1f69b75 7572 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7573 timeo = rpc_get_timeout(task->tk_client);
7574 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7575 now = jiffies;
7576 if (time_after(giveup, now)) {
7577 unsigned long delay;
7578
7579 /* Delay for:
7580 * - Not less then NFS4_POLL_RETRY_MIN.
7581 * - One last time a jiffie before we give up
7582 * - exponential backoff (time_now minus start_attempt)
7583 */
7584 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7585 min((giveup - now - 1),
7586 now - lgp->args.timestamp));
7587
7588 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7589 __func__, delay);
7590 rpc_delay(task, delay);
7591 task->tk_status = 0;
7592 rpc_restart_call_prepare(task);
7593 goto out; /* Do not call nfs4_async_handle_error() */
7594 }
ee314c2a
TM		 7595 break;
7596 case -NFS4ERR_EXPIRED:
7597 case -NFS4ERR_BAD_STATEID:
7598 spin_lock(&inode->i_lock);
7599 lo = NFS_I(inode)->layout;
7600 if (!lo || list_empty(&lo->plh_segs)) {
7601 spin_unlock(&inode->i_lock);
7602 /* If the open stateid was bad, then recover it. */
7603 state = lgp->args.ctx->state;
7604 } else {
7605 LIST_HEAD(head);
7606
defb8460
CH		 7607 /*
7608 * Mark the bad layout state as invalid, then retry
7609 * with the current stateid.
7610 */
ee314c2a
TM		 7611 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7612 spin_unlock(&inode->i_lock);
ee314c2a 7613 pnfs_free_lseg_list(&head);
defb8460
CH		 7614
7615 task->tk_status = 0;
7616 rpc_restart_call_prepare(task);
b1f69b75
AA		 7617 }
7618 }
8478eaa1 7619 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
ee314c2a
TM		 7620 rpc_restart_call_prepare(task);
7621out:
b1f69b75
AA		 7622 dprintk("<-- %s\n", __func__);
7623}
7624
8554116e
IK		 7625static size_t max_response_pages(struct nfs_server *server)
7626{
7627 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7628 return nfs_page_array_len(0, max_resp_sz);
7629}
7630
7631static void nfs4_free_pages(struct page **pages, size_t size)
7632{
7633 int i;
7634
7635 if (!pages)
7636 return;
7637
7638 for (i = 0; i < size; i++) {
7639 if (!pages[i])
7640 break;
7641 __free_page(pages[i]);
7642 }
7643 kfree(pages);
7644}
7645
7646static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7647{
7648 struct page **pages;
7649 int i;
7650
7651 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7652 if (!pages) {
7653 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7654 return NULL;
7655 }
7656
7657 for (i = 0; i < size; i++) {
7658 pages[i] = alloc_page(gfp_flags);
7659 if (!pages[i]) {
7660 dprintk("%s: failed to allocate page\n", __func__);
7661 nfs4_free_pages(pages, size);
7662 return NULL;
7663 }
7664 }
7665
7666 return pages;
7667}
7668
b1f69b75
AA		 7669static void nfs4_layoutget_release(void *calldata)
7670{
7671 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7672 struct inode *inode = lgp->args.inode;
7673 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7674 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7675
7676 dprintk("--> %s\n", __func__);
8554116e 7677 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7678 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7679 put_nfs_open_context(lgp->args.ctx);
7680 kfree(calldata);
7681 dprintk("<-- %s\n", __func__);
7682}
7683
7684static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7685 .rpc_call_prepare = nfs4_layoutget_prepare,
7686 .rpc_call_done = nfs4_layoutget_done,
7687 .rpc_release = nfs4_layoutget_release,
7688};
7689
a0b0a6e3
TM		 7690struct pnfs_layout_segment *
7691nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7692{
a47970ff
WAA		 7693 struct inode *inode = lgp->args.inode;
7694 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7695 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7696 struct rpc_task *task;
7697 struct rpc_message msg = {
7698 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7699 .rpc_argp = &lgp->args,
7700 .rpc_resp = &lgp->res,
6ab59344 7701 .rpc_cred = lgp->cred,
b1f69b75
AA		 7702 };
7703 struct rpc_task_setup task_setup_data = {
7704 .rpc_client = server->client,
7705 .rpc_message = &msg,
7706 .callback_ops = &nfs4_layoutget_call_ops,
7707 .callback_data = lgp,
7708 .flags = RPC_TASK_ASYNC,
7709 };
a0b0a6e3 7710 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7711 int status = 0;
7712
7713 dprintk("--> %s\n", __func__);
7714
8554116e
IK		 7715 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7716 if (!lgp->args.layout.pages) {
7717 nfs4_layoutget_release(lgp);
a0b0a6e3 7718 return ERR_PTR(-ENOMEM);
8554116e
IK		 7719 }
7720 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7721 lgp->args.timestamp = jiffies;
8554116e 7722
35124a09 7723 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7724 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7725 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 7726
7727 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7728 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7729
b1f69b75
AA		 7730 task = rpc_run_task(&task_setup_data);
7731 if (IS_ERR(task))
a0b0a6e3 7732 return ERR_CAST(task);
b1f69b75 7733 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7734 if (status == 0)
7735 status = task->tk_status;
1037e6ea
TM		 7736 trace_nfs4_layoutget(lgp->args.ctx,
7737 &lgp->args.range,
7738 &lgp->res.range,
7739 status);
085b7a45
WAA		 7740 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7741 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7742 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7743 rpc_put_task(task);
7744 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7745 if (status)
7746 return ERR_PTR(status);
7747 return lseg;
b1f69b75
AA		 7748}
7749
cbe82603
BH		 7750static void
7751nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7752{
7753 struct nfs4_layoutreturn *lrp = calldata;
7754
7755 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7756 nfs41_setup_sequence(lrp->clp->cl_session,
7757 &lrp->args.seq_args,
7758 &lrp->res.seq_res,
7759 task);
cbe82603
BH		 7760}
7761
7762static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7763{
7764 struct nfs4_layoutreturn *lrp = calldata;
7765 struct nfs_server *server;
7766
7767 dprintk("--> %s\n", __func__);
7768
6ba7db34 7769 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7770 return;
7771
7772 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7773 switch (task->tk_status) {
7774 default:
7775 task->tk_status = 0;
7776 case 0:
7777 break;
7778 case -NFS4ERR_DELAY:
8478eaa1 7779 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 7780 break;
d00c5d43 7781 rpc_restart_call_prepare(task);
cbe82603
BH		 7782 return;
7783 }
cbe82603
BH		 7784 dprintk("<-- %s\n", __func__);
7785}
7786
7787static void nfs4_layoutreturn_release(void *calldata)
7788{
7789 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7790 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7791
7792 dprintk("--> %s\n", __func__);
849b286f
TM		 7793 spin_lock(&lo->plh_inode->i_lock);
7794 if (lrp->res.lrs_present)
7795 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7796 lo->plh_block_lgets--;
7797 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7798 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 7799 kfree(calldata);
7800 dprintk("<-- %s\n", __func__);
7801}
7802
7803static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7804 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7805 .rpc_call_done = nfs4_layoutreturn_done,
7806 .rpc_release = nfs4_layoutreturn_release,
7807};
7808
7809int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7810{
7811 struct rpc_task *task;
7812 struct rpc_message msg = {
7813 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7814 .rpc_argp = &lrp->args,
7815 .rpc_resp = &lrp->res,
9556000d 7816 .rpc_cred = lrp->cred,
cbe82603
BH		 7817 };
7818 struct rpc_task_setup task_setup_data = {
1771c577 7819 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7820 .rpc_message = &msg,
7821 .callback_ops = &nfs4_layoutreturn_call_ops,
7822 .callback_data = lrp,
7823 };
7824 int status;
7825
7826 dprintk("--> %s\n", __func__);
a9c92d6b 7827 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7828 task = rpc_run_task(&task_setup_data);
7829 if (IS_ERR(task))
7830 return PTR_ERR(task);
7831 status = task->tk_status;
1037e6ea 7832 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7833 dprintk("<-- %s status=%d\n", __func__, status);
7834 rpc_put_task(task);
7835 return status;
7836}
7837
b1f69b75 7838static int
cd5875fe
TM		 7839_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7840 struct pnfs_device *pdev,
7841 struct rpc_cred *cred)
b1f69b75
AA		 7842{
7843 struct nfs4_getdeviceinfo_args args = {
7844 .pdev = pdev,
7845 };
7846 struct nfs4_getdeviceinfo_res res = {
7847 .pdev = pdev,
7848 };
7849 struct rpc_message msg = {
7850 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7851 .rpc_argp = &args,
7852 .rpc_resp = &res,
cd5875fe 7853 .rpc_cred = cred,
b1f69b75
AA		 7854 };
7855 int status;
7856
7857 dprintk("--> %s\n", __func__);
7c513058 7858 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7859 dprintk("<-- %s status=%d\n", __func__, status);
7860
7861 return status;
7862}
7863
cd5875fe
TM		 7864int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7865 struct pnfs_device *pdev,
7866 struct rpc_cred *cred)
b1f69b75
AA		 7867{
7868 struct nfs4_exception exception = { };
7869 int err;
7870
7871 do {
7872 err = nfs4_handle_exception(server,
cd5875fe 7873 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7874 &exception);
7875 } while (exception.retry);
7876 return err;
7877}
7878EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7879
863a3c6c
AA		 7880static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7881{
7882 struct nfs4_layoutcommit_data *data = calldata;
7883 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7884 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7885
d9afbd1b
TM		 7886 nfs41_setup_sequence(session,
7887 &data->args.seq_args,
7888 &data->res.seq_res,
7889 task);
863a3c6c
AA		 7890}
7891
7892static void
7893nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7894{
7895 struct nfs4_layoutcommit_data *data = calldata;
7896 struct nfs_server *server = NFS_SERVER(data->args.inode);
7897
6ba7db34 7898 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7899 return;
7900
7901 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7902 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7903 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7904 case -NFS4ERR_BADLAYOUT: /* no layout */
7905 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7906 task->tk_status = 0;
e59d27e0 7907 case 0:
e59d27e0
TM		 7908 break;
7909 default:
8478eaa1 7910 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 7911 rpc_restart_call_prepare(task);
7912 return;
7913 }
7914 }
863a3c6c
AA		 7915}
7916
7917static void nfs4_layoutcommit_release(void *calldata)
7918{
7919 struct nfs4_layoutcommit_data *data = calldata;
7920
db29c089 7921 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 7922 nfs_post_op_update_inode_force_wcc(data->args.inode,
7923 data->res.fattr);
863a3c6c
AA		 7924 put_rpccred(data->cred);
7925 kfree(data);
7926}
7927
7928static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7929 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7930 .rpc_call_done = nfs4_layoutcommit_done,
7931 .rpc_release = nfs4_layoutcommit_release,
7932};
7933
7934int
ef311537 7935nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7936{
7937 struct rpc_message msg = {
7938 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7939 .rpc_argp = &data->args,
7940 .rpc_resp = &data->res,
7941 .rpc_cred = data->cred,
7942 };
7943 struct rpc_task_setup task_setup_data = {
7944 .task = &data->task,
7945 .rpc_client = NFS_CLIENT(data->args.inode),
7946 .rpc_message = &msg,
7947 .callback_ops = &nfs4_layoutcommit_ops,
7948 .callback_data = data,
7949 .flags = RPC_TASK_ASYNC,
7950 };
7951 struct rpc_task *task;
7952 int status = 0;
7953
7954 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7955 "lbw: %llu inode %lu\n",
7956 data->task.tk_pid, sync,
7957 data->args.lastbytewritten,
7958 data->args.inode->i_ino);
7959
a9c92d6b 7960 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7961 task = rpc_run_task(&task_setup_data);
7962 if (IS_ERR(task))
7963 return PTR_ERR(task);
ef311537 7964 if (sync == false)
863a3c6c
AA		 7965 goto out;
7966 status = nfs4_wait_for_completion_rpc_task(task);
7967 if (status != 0)
7968 goto out;
7969 status = task->tk_status;
1037e6ea 7970 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7971out:
7972 dprintk("%s: status %d\n", __func__, status);
7973 rpc_put_task(task);
7974 return status;
7975}
fca78d6d 7976
97431204
AA		 7977/**
7978 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7979 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7980 */
fca78d6d
BS		 7981static int
7982_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 7983 struct nfs_fsinfo *info,
7984 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 7985{
7986 struct nfs41_secinfo_no_name_args args = {
7987 .style = SECINFO_STYLE_CURRENT_FH,
7988 };
7989 struct nfs4_secinfo_res res = {
7990 .flavors = flavors,
7991 };
7992 struct rpc_message msg = {
7993 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7994 .rpc_argp = &args,
7995 .rpc_resp = &res,
7996 };
b1b3e136 7997 struct rpc_clnt *clnt = server->client;
7cb852df 7998 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 7999 int status;
8000
8001 if (use_integrity) {
8002 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8003 cred = nfs4_get_clid_cred(server->nfs_client);
8004 msg.rpc_cred = cred;
b1b3e136
WAA		 8005 }
8006
8007 dprintk("--> %s\n", __func__);
8008 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8009 &res.seq_res, 0);
8010 dprintk("<-- %s status=%d\n", __func__, status);
8011
7cb852df
WAA		 8012 if (cred)
8013 put_rpccred(cred);
b1b3e136
WAA		 8014
8015 return status;
fca78d6d
BS		 8016}
8017
8018static int
8019nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8020 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8021{
8022 struct nfs4_exception exception = { };
8023 int err;
8024 do {
b1b3e136
WAA		 8025 /* first try using integrity protection */
8026 err = -NFS4ERR_WRONGSEC;
8027
8028 /* try to use integrity protection with machine cred */
8029 if (_nfs4_is_integrity_protected(server->nfs_client))
8030 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8031 flavors, true);
8032
8033 /*
8034 * if unable to use integrity protection, or SECINFO with
8035 * integrity protection returns NFS4ERR_WRONGSEC (which is
8036 * disallowed by spec, but exists in deployed servers) use
8037 * the current filesystem's rpc_client and the user cred.
8038 */
8039 if (err == -NFS4ERR_WRONGSEC)
8040 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8041 flavors, false);
8042
fca78d6d
BS		 8043 switch (err) {
8044 case 0:
8045 case -NFS4ERR_WRONGSEC:
78b19bae 8046 case -ENOTSUPP:
05e9cfb4 8047 goto out;
fca78d6d
BS		 8048 default:
8049 err = nfs4_handle_exception(server, err, &exception);
8050 }
8051 } while (exception.retry);
05e9cfb4 8052out:
fca78d6d
BS		 8053 return err;
8054}
8055
8056static int
8057nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8058 struct nfs_fsinfo *info)
8059{
8060 int err;
8061 struct page *page;
367156d9 8062 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8063 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8064 struct nfs4_secinfo4 *secinfo;
8065 int i;
fca78d6d
BS		 8066
8067 page = alloc_page(GFP_KERNEL);
8068 if (!page) {
8069 err = -ENOMEM;
8070 goto out;
8071 }
8072
8073 flavors = page_address(page);
8074 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8075
8076 /*
8077 * Fall back on "guess and check" method if
8078 * the server doesn't support SECINFO_NO_NAME
8079 */
78b19bae 8080 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8081 err = nfs4_find_root_sec(server, fhandle, info);
8082 goto out_freepage;
8083 }
8084 if (err)
8085 goto out_freepage;
8086
58a8cf12
WAA		 8087 for (i = 0; i < flavors->num_flavors; i++) {
8088 secinfo = &flavors->flavors[i];
8089
8090 switch (secinfo->flavor) {
8091 case RPC_AUTH_NULL:
8092 case RPC_AUTH_UNIX:
8093 case RPC_AUTH_GSS:
8094 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8095 &secinfo->flavor_info);
8096 break;
8097 default:
8098 flavor = RPC_AUTH_MAXFLAVOR;
8099 break;
8100 }
8101
4d4b69dd
WAA		 8102 if (!nfs_auth_info_match(&server->auth_info, flavor))
8103 flavor = RPC_AUTH_MAXFLAVOR;
8104
58a8cf12
WAA		 8105 if (flavor != RPC_AUTH_MAXFLAVOR) {
8106 err = nfs4_lookup_root_sec(server, fhandle,
8107 info, flavor);
8108 if (!err)
8109 break;
8110 }
8111 }
8112
8113 if (flavor == RPC_AUTH_MAXFLAVOR)
8114 err = -EPERM;
fca78d6d
BS		 8115
8116out_freepage:
8117 put_page(page);
8118 if (err == -EACCES)
8119 return -EPERM;
8120out:
8121 return err;
8122}
1cab0652 8123
ab7cb0df
TM		 8124static int _nfs41_test_stateid(struct nfs_server *server,
8125 nfs4_stateid *stateid,
8126 struct rpc_cred *cred)
7d974794
BS		 8127{
8128 int status;
8129 struct nfs41_test_stateid_args args = {
1cab0652 8130 .stateid = stateid,
7d974794
BS		 8131 };
8132 struct nfs41_test_stateid_res res;
8133 struct rpc_message msg = {
8134 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8135 .rpc_argp = &args,
8136 .rpc_resp = &res,
ab7cb0df 8137 .rpc_cred = cred,
7d974794 8138 };
3787d506
WAA		 8139 struct rpc_clnt *rpc_client = server->client;
8140
8141 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8142 &rpc_client, &msg);
1cab0652 8143
38527b15 8144 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8145 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8146 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8147 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8148 &args.seq_args, &res.seq_res);
38527b15
CL		 8149 if (status != NFS_OK) {
8150 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8151 return status;
38527b15
CL		 8152 }
8153 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8154 return -res.status;
7d974794
BS		 8155}
8156
38527b15
CL		 8157/**
8158 * nfs41_test_stateid - perform a TEST_STATEID operation
8159 *
8160 * @server: server / transport on which to perform the operation
8161 * @stateid: state ID to test
ab7cb0df 8162 * @cred: credential
38527b15
CL		 8163 *
8164 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8165 * Otherwise a negative NFS4ERR value is returned if the operation
8166 * failed or the state ID is not currently valid.
8167 */
ab7cb0df
TM		 8168static int nfs41_test_stateid(struct nfs_server *server,
8169 nfs4_stateid *stateid,
8170 struct rpc_cred *cred)
7d974794
BS		 8171{
8172 struct nfs4_exception exception = { };
8173 int err;
8174 do {
ab7cb0df 8175 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8176 if (err != -NFS4ERR_DELAY)
8177 break;
8178 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8179 } while (exception.retry);
8180 return err;
8181}
9aeda35f 8182
7c1d5fae
TM		 8183struct nfs_free_stateid_data {
8184 struct nfs_server *server;
8185 struct nfs41_free_stateid_args args;
9aeda35f 8186 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8187};
8188
8189static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8190{
8191 struct nfs_free_stateid_data *data = calldata;
8192 nfs41_setup_sequence(nfs4_get_session(data->server),
8193 &data->args.seq_args,
8194 &data->res.seq_res,
8195 task);
8196}
8197
8198static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8199{
8200 struct nfs_free_stateid_data *data = calldata;
8201
8202 nfs41_sequence_done(task, &data->res.seq_res);
8203
8204 switch (task->tk_status) {
8205 case -NFS4ERR_DELAY:
8478eaa1 8206 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8207 rpc_restart_call_prepare(task);
8208 }
8209}
8210
8211static void nfs41_free_stateid_release(void *calldata)
8212{
8213 kfree(calldata);
8214}
8215
17f26b12 8216static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8217 .rpc_call_prepare = nfs41_free_stateid_prepare,
8218 .rpc_call_done = nfs41_free_stateid_done,
8219 .rpc_release = nfs41_free_stateid_release,
8220};
8221
8222static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8223 nfs4_stateid *stateid,
ab7cb0df 8224 struct rpc_cred *cred,
7c1d5fae
TM		 8225 bool privileged)
8226{
9aeda35f
BS		 8227 struct rpc_message msg = {
8228 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8229 .rpc_cred = cred,
9aeda35f 8230 };
7c1d5fae
TM		 8231 struct rpc_task_setup task_setup = {
8232 .rpc_client = server->client,
8233 .rpc_message = &msg,
8234 .callback_ops = &nfs41_free_stateid_ops,
8235 .flags = RPC_TASK_ASYNC,
8236 };
8237 struct nfs_free_stateid_data *data;
9aeda35f 8238
3787d506
WAA		 8239 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8240 &task_setup.rpc_client, &msg);
8241
38527b15 8242 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8243 data = kmalloc(sizeof(*data), GFP_NOFS);
8244 if (!data)
8245 return ERR_PTR(-ENOMEM);
8246 data->server = server;
8247 nfs4_stateid_copy(&data->args.stateid, stateid);
8248
8249 task_setup.callback_data = data;
8250
8251 msg.rpc_argp = &data->args;
8252 msg.rpc_resp = &data->res;
a9c92d6b 8253 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8254 if (privileged)
8255 nfs4_set_sequence_privileged(&data->args.seq_args);
8256
8257 return rpc_run_task(&task_setup);
9aeda35f
BS		 8258}
8259
38527b15
CL		 8260/**
8261 * nfs41_free_stateid - perform a FREE_STATEID operation
8262 *
8263 * @server: server / transport on which to perform the operation
8264 * @stateid: state ID to release
ab7cb0df 8265 * @cred: credential
38527b15
CL		 8266 *
8267 * Returns NFS_OK if the server freed "stateid". Otherwise a
8268 * negative NFS4ERR value is returned.
8269 */
ab7cb0df
TM		 8270static int nfs41_free_stateid(struct nfs_server *server,
8271 nfs4_stateid *stateid,
8272 struct rpc_cred *cred)
9aeda35f 8273{
7c1d5fae
TM		 8274 struct rpc_task *task;
8275 int ret;
8276
ab7cb0df 8277 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8278 if (IS_ERR(task))
8279 return PTR_ERR(task);
8280 ret = rpc_wait_for_completion_task(task);
8281 if (!ret)
8282 ret = task->tk_status;
8283 rpc_put_task(task);
8284 return ret;
9aeda35f 8285}
36281caa 8286
f1cdae87
JL		 8287static void
8288nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8289{
8290 struct rpc_task *task;
ab7cb0df 8291 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8292
ab7cb0df 8293 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8294 nfs4_free_lock_state(server, lsp);
8295 if (IS_ERR(task))
f1cdae87 8296 return;
c8b2d0bf 8297 rpc_put_task(task);
c8b2d0bf
TM		 8298}
8299
36281caa
TM		 8300static bool nfs41_match_stateid(const nfs4_stateid *s1,
8301 const nfs4_stateid *s2)
8302{
2d2f24ad 8303 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8304 return false;
8305
2d2f24ad 8306 if (s1->seqid == s2->seqid)
36281caa 8307 return true;
2d2f24ad 8308 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8309 return true;
8310
8311 return false;
8312}
8313
557134a3
AA		 8314#endif /* CONFIG_NFS_V4_1 */
8315
36281caa
TM		 8316static bool nfs4_match_stateid(const nfs4_stateid *s1,
8317 const nfs4_stateid *s2)
8318{
f597c537 8319 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8320}
8321
8322
17280175 8323static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8324 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8325 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8326 .recover_open = nfs4_open_reclaim,
8327 .recover_lock = nfs4_lock_reclaim,
591d71cb 8328 .establish_clid = nfs4_init_clientid,
05f4c350 8329 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8330};
8331
591d71cb 8332#if defined(CONFIG_NFS_V4_1)
17280175 8333static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8334 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8335 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8336 .recover_open = nfs4_open_reclaim,
8337 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8338 .establish_clid = nfs41_init_clientid,
fce5c838 8339 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8340 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8341};
8342#endif /* CONFIG_NFS_V4_1 */
8343
17280175 8344static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8345 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8346 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8347 .recover_open = nfs40_open_expired,
591d71cb
AA		 8348 .recover_lock = nfs4_lock_expired,
8349 .establish_clid = nfs4_init_clientid,
8350};
8351
8352#if defined(CONFIG_NFS_V4_1)
17280175 8353static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8354 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8355 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8356 .recover_open = nfs41_open_expired,
8357 .recover_lock = nfs41_lock_expired,
4d643d1d 8358 .establish_clid = nfs41_init_clientid,
1da177e4 8359};
591d71cb 8360#endif /* CONFIG_NFS_V4_1 */
1da177e4 8361
17280175 8362static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8363 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8364 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8365 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8366};
8367
8368#if defined(CONFIG_NFS_V4_1)
17280175 8369static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8370 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8371 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8372 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8373};
8374#endif
8375
ec011fe8 8376static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8377 .get_locations = _nfs40_proc_get_locations,
44c99933 8378 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8379};
8380
8381#if defined(CONFIG_NFS_V4_1)
8382static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8383 .get_locations = _nfs41_proc_get_locations,
44c99933 8384 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8385};
8386#endif /* CONFIG_NFS_V4_1 */
8387
97dc1359
TM		 8388static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8389 .minor_version = 0,
39c6daae
TM		 8390 .init_caps = NFS_CAP_READDIRPLUS
8391 | NFS_CAP_ATOMIC_OPEN
8392 | NFS_CAP_CHANGE_ATTR
8393 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8394 .init_client = nfs40_init_client,
8395 .shutdown_client = nfs40_shutdown_client,
36281caa 8396 .match_stateid = nfs4_match_stateid,
fca78d6d 8397 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8398 .free_lock_state = nfs4_release_lockowner,
9915ea7e 8399 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8400 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8401 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8402 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8403 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8404};
8405
8406#if defined(CONFIG_NFS_V4_1)
8407static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8408 .minor_version = 1,
39c6daae
TM		 8409 .init_caps = NFS_CAP_READDIRPLUS
8410 | NFS_CAP_ATOMIC_OPEN
8411 | NFS_CAP_CHANGE_ATTR
3b66486c 8412 | NFS_CAP_POSIX_LOCK
49f9a0fa 8413 | NFS_CAP_STATEID_NFSV41
e983120e 8414 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8415 .init_client = nfs41_init_client,
8416 .shutdown_client = nfs41_shutdown_client,
36281caa 8417 .match_stateid = nfs41_match_stateid,
fca78d6d 8418 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8419 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8420 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8421 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8422 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8423 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8424 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8425};
8426#endif
8427
42c2c424
SD		 8428#if defined(CONFIG_NFS_V4_2)
8429static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8430 .minor_version = 2,
7017310a
BS		 8431 .init_caps = NFS_CAP_READDIRPLUS
8432 | NFS_CAP_ATOMIC_OPEN
8433 | NFS_CAP_CHANGE_ATTR
8434 | NFS_CAP_POSIX_LOCK
8435 | NFS_CAP_STATEID_NFSV41
e983120e
AS		 8436 | NFS_CAP_ATOMIC_OPEN_V1
8437 | NFS_CAP_SEEK,
abf79bb3
CL		 8438 .init_client = nfs41_init_client,
8439 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8440 .match_stateid = nfs41_match_stateid,
8441 .find_root_sec = nfs41_find_root_sec,
7017310a 8442 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8443 .call_sync_ops = &nfs41_call_sync_ops,
42c2c424
SD		 8444 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8445 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8446 .state_renewal_ops = &nfs41_state_renewal_ops,
8447};
8448#endif
8449
97dc1359
TM		 8450const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8451 [0] = &nfs_v4_0_minor_ops,
8452#if defined(CONFIG_NFS_V4_1)
8453 [1] = &nfs_v4_1_minor_ops,
8454#endif
42c2c424
SD		 8455#if defined(CONFIG_NFS_V4_2)
8456 [2] = &nfs_v4_2_minor_ops,
8457#endif
97dc1359
TM		 8458};
8459
17f26b12 8460static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8461 .create = nfs_create,
8462 .lookup = nfs_lookup,
8463 .atomic_open = nfs_atomic_open,
8464 .link = nfs_link,
8465 .unlink = nfs_unlink,
8466 .symlink = nfs_symlink,
8467 .mkdir = nfs_mkdir,
8468 .rmdir = nfs_rmdir,
8469 .mknod = nfs_mknod,
8470 .rename = nfs_rename,
8471 .permission = nfs_permission,
8472 .getattr = nfs_getattr,
8473 .setattr = nfs_setattr,
8474 .getxattr = generic_getxattr,
8475 .setxattr = generic_setxattr,
8476 .listxattr = generic_listxattr,
8477 .removexattr = generic_removexattr,
8478};
8479
92e1d5be 8480static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8481 .permission = nfs_permission,
8482 .getattr = nfs_getattr,
8483 .setattr = nfs_setattr,
64c2ce8b
AK		 8484 .getxattr = generic_getxattr,
8485 .setxattr = generic_setxattr,
8486 .listxattr = generic_listxattr,
8487 .removexattr = generic_removexattr,
6b3b5496
BF		 8488};
8489
509de811 8490const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8491 .version = 4, /* protocol version */
8492 .dentry_ops = &nfs4_dentry_operations,
8493 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8494 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8495 .file_ops = &nfs4_file_operations,
1da177e4 8496 .getroot = nfs4_proc_get_root,
281cad46 8497 .submount = nfs4_submount,
ff9099f2 8498 .try_mount = nfs4_try_mount,
1da177e4
LT		 8499 .getattr = nfs4_proc_getattr,
8500 .setattr = nfs4_proc_setattr,
8501 .lookup = nfs4_proc_lookup,
8502 .access = nfs4_proc_access,
8503 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8504 .create = nfs4_proc_create,
8505 .remove = nfs4_proc_remove,
8506 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8507 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8508 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8509 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8510 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8511 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8512 .link = nfs4_proc_link,
8513 .symlink = nfs4_proc_symlink,
8514 .mkdir = nfs4_proc_mkdir,
8515 .rmdir = nfs4_proc_remove,
8516 .readdir = nfs4_proc_readdir,
8517 .mknod = nfs4_proc_mknod,
8518 .statfs = nfs4_proc_statfs,
8519 .fsinfo = nfs4_proc_fsinfo,
8520 .pathconf = nfs4_proc_pathconf,
e9326dca 8521 .set_capabilities = nfs4_server_capabilities,
1da177e4 8522 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8523 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8524 .read_setup = nfs4_proc_read_setup,
ec06c096 8525 .read_done = nfs4_read_done,
1da177e4 8526 .write_setup = nfs4_proc_write_setup,
788e7a89 8527 .write_done = nfs4_write_done,
1da177e4 8528 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8529 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8530 .commit_done = nfs4_commit_done,
1da177e4 8531 .lock = nfs4_proc_lock,
e50a1c2e 8532 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8533 .close_context = nfs4_close_context,
2b484297 8534 .open_context = nfs4_atomic_open,
011e2a7f 8535 .have_delegation = nfs4_have_delegation,
57ec14c5 8536 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8537 .alloc_client = nfs4_alloc_client,
45a52a02 8538 .init_client = nfs4_init_client,
cdb7eced 8539 .free_client = nfs4_free_client,
1179acc6
BS		 8540 .create_server = nfs4_create_server,
8541 .clone_server = nfs_clone_server,
1da177e4
LT		 8542};
8543
64c2ce8b
AK		 8544static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8545 .prefix = XATTR_NAME_NFSV4_ACL,
8546 .list = nfs4_xattr_list_nfs4_acl,
8547 .get = nfs4_xattr_get_nfs4_acl,
8548 .set = nfs4_xattr_set_nfs4_acl,
8549};
8550
8551const struct xattr_handler *nfs4_xattr_handlers[] = {
8552 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8553#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8554 &nfs4_xattr_nfs4_label_handler,
8555#endif
64c2ce8b
AK		 8556 NULL
8557};
8558
1da177e4
LT		 8559/*
8560 * Local variables:
8561 * c-basic-offset: 8
8562 * End:
8563 */
Linux 6.x block layer and io_uring tree(s)