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NFS: Support NFS4ERR_LEASE_MOVED recovery in state manager
[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 *);
9e33bed5 80static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
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
108 if (NFS_SERVER(dir)->nfs_client->cl_minorversion < 2)
109 return NULL;
110
111 err = security_dentry_init_security(dentry, sattr->ia_mode,
112 &dentry->d_name, (void **)&label->label, &label->len);
113 if (err == 0)
114 return label;
115
116 return NULL;
117}
118static inline void
119nfs4_label_release_security(struct nfs4_label *label)
120{
121 if (label)
122 security_release_secctx(label->label, label->len);
123}
124static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
125{
126 if (label)
127 return server->attr_bitmask;
128
129 return server->attr_bitmask_nl;
130}
131#else
132static inline struct nfs4_label *
133nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
134 struct iattr *sattr, struct nfs4_label *l)
135{ return NULL; }
136static inline void
137nfs4_label_release_security(struct nfs4_label *label)
138{ return; }
139static inline u32 *
140nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
141{ return server->attr_bitmask; }
142#endif
143
1da177e4 144/* Prevent leaks of NFSv4 errors into userland */
46f72f57 145static int nfs4_map_errors(int err)
1da177e4 146{
52567b03
TM		 147 if (err >= -1000)
148 return err;
149 switch (err) {
150 case -NFS4ERR_RESOURCE:
30005121
WAA		 151 case -NFS4ERR_LAYOUTTRYLATER:
152 case -NFS4ERR_RECALLCONFLICT:
52567b03 153 return -EREMOTEIO;
7ebb9315 154 case -NFS4ERR_WRONGSEC:
8897538e 155 case -NFS4ERR_WRONG_CRED:
7ebb9315 156 return -EPERM;
3ddeb7c5
TM		 157 case -NFS4ERR_BADOWNER:
158 case -NFS4ERR_BADNAME:
159 return -EINVAL;
fb13bfa7
TM		 160 case -NFS4ERR_SHARE_DENIED:
161 return -EACCES;
f25efd85
SD		 162 case -NFS4ERR_MINOR_VERS_MISMATCH:
163 return -EPROTONOSUPPORT;
6168f62c
WAA		 164 case -NFS4ERR_ACCESS:
165 return -EACCES;
6e3cf241
TM		 166 case -NFS4ERR_FILE_OPEN:
167 return -EBUSY;
52567b03 168 default:
1da177e4 169 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 170 __func__, -err);
52567b03 171 break;
1da177e4 172 }
52567b03 173 return -EIO;
1da177e4
LT		 174}
175
176/*
177 * This is our standard bitmap for GETATTR requests.
178 */
1549210f 179const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 180 FATTR4_WORD0_TYPE
181 | FATTR4_WORD0_CHANGE
182 | FATTR4_WORD0_SIZE
183 | FATTR4_WORD0_FSID
184 | FATTR4_WORD0_FILEID,
185 FATTR4_WORD1_MODE
186 | FATTR4_WORD1_NUMLINKS
187 | FATTR4_WORD1_OWNER
188 | FATTR4_WORD1_OWNER_GROUP
189 | FATTR4_WORD1_RAWDEV
190 | FATTR4_WORD1_SPACE_USED
191 | FATTR4_WORD1_TIME_ACCESS
192 | FATTR4_WORD1_TIME_METADATA
aa9c2669
DQ		 193 | FATTR4_WORD1_TIME_MODIFY,
194#ifdef CONFIG_NFS_V4_SECURITY_LABEL
195 FATTR4_WORD2_SECURITY_LABEL
196#endif
1da177e4
LT		 197};
198
1549210f
TM		 199static const u32 nfs4_pnfs_open_bitmap[3] = {
200 FATTR4_WORD0_TYPE
201 | FATTR4_WORD0_CHANGE
202 | FATTR4_WORD0_SIZE
203 | FATTR4_WORD0_FSID
204 | FATTR4_WORD0_FILEID,
205 FATTR4_WORD1_MODE
206 | FATTR4_WORD1_NUMLINKS
207 | FATTR4_WORD1_OWNER
208 | FATTR4_WORD1_OWNER_GROUP
209 | FATTR4_WORD1_RAWDEV
210 | FATTR4_WORD1_SPACE_USED
211 | FATTR4_WORD1_TIME_ACCESS
212 | FATTR4_WORD1_TIME_METADATA
213 | FATTR4_WORD1_TIME_MODIFY,
214 FATTR4_WORD2_MDSTHRESHOLD
215};
216
e23008ec
AA		 217static const u32 nfs4_open_noattr_bitmap[3] = {
218 FATTR4_WORD0_TYPE
219 | FATTR4_WORD0_CHANGE
220 | FATTR4_WORD0_FILEID,
221};
222
a09df2ca 223const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 224 FATTR4_WORD0_FILES_AVAIL
225 | FATTR4_WORD0_FILES_FREE
226 | FATTR4_WORD0_FILES_TOTAL,
227 FATTR4_WORD1_SPACE_AVAIL
228 | FATTR4_WORD1_SPACE_FREE
229 | FATTR4_WORD1_SPACE_TOTAL
230};
231
a09df2ca 232const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 233 FATTR4_WORD0_MAXLINK
234 | FATTR4_WORD0_MAXNAME,
235 0
236};
237
dae100c2 238const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 239 | FATTR4_WORD0_MAXREAD
240 | FATTR4_WORD0_MAXWRITE
241 | FATTR4_WORD0_LEASE_TIME,
55b6e774 242 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 243 | FATTR4_WORD1_FS_LAYOUT_TYPES,
244 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 245};
246
a09df2ca 247const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 248 FATTR4_WORD0_TYPE
249 | FATTR4_WORD0_CHANGE
250 | FATTR4_WORD0_SIZE
251 | FATTR4_WORD0_FSID
252 | FATTR4_WORD0_FILEID
253 | FATTR4_WORD0_FS_LOCATIONS,
254 FATTR4_WORD1_MODE
255 | FATTR4_WORD1_NUMLINKS
256 | FATTR4_WORD1_OWNER
257 | FATTR4_WORD1_OWNER_GROUP
258 | FATTR4_WORD1_RAWDEV
259 | FATTR4_WORD1_SPACE_USED
260 | FATTR4_WORD1_TIME_ACCESS
261 | FATTR4_WORD1_TIME_METADATA
262 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 263 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 264};
265
bc4785cd 266static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 267 struct nfs4_readdir_arg *readdir)
268{
0dbb4c67 269 __be32 *start, *p;
1da177e4 270
1da177e4 271 if (cookie > 2) {
b7ef1956 272 readdir->cookie = cookie;
1da177e4
LT		 273 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
274 return;
275 }
276
277 readdir->cookie = 0;
278 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
279 if (cookie == 2)
280 return;
281
282 /*
283 * NFSv4 servers do not return entries for '.' and '..'
284 * Therefore, we fake these entries here. We let '.'
285 * have cookie 0 and '..' have cookie 1. Note that
286 * when talking to the server, we always send cookie 0
287 * instead of 1 or 2.
288 */
2b86ce2d 289 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 290
291 if (cookie == 0) {
292 *p++ = xdr_one; /* next */
293 *p++ = xdr_zero; /* cookie, first word */
294 *p++ = xdr_one; /* cookie, second word */
295 *p++ = xdr_one; /* entry len */
296 memcpy(p, ".\0\0\0", 4); /* entry */
297 p++;
298 *p++ = xdr_one; /* bitmap length */
299 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
300 *p++ = htonl(8); /* attribute buffer length */
4e769b93 301 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 302 }
303
304 *p++ = xdr_one; /* next */
305 *p++ = xdr_zero; /* cookie, first word */
306 *p++ = xdr_two; /* cookie, second word */
307 *p++ = xdr_two; /* entry len */
308 memcpy(p, "..\0\0", 4); /* entry */
309 p++;
310 *p++ = xdr_one; /* bitmap length */
311 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
312 *p++ = htonl(8); /* attribute buffer length */
4e769b93 313 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 314
315 readdir->pgbase = (char *)p - (char *)start;
316 readdir->count -= readdir->pgbase;
2b86ce2d 317 kunmap_atomic(start);
1da177e4
LT		 318}
319
65de872e
TM		 320static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
321{
322 int res = 0;
323
324 might_sleep();
325
326 if (*timeout <= 0)
327 *timeout = NFS4_POLL_RETRY_MIN;
328 if (*timeout > NFS4_POLL_RETRY_MAX)
329 *timeout = NFS4_POLL_RETRY_MAX;
416ad3c9 330 freezable_schedule_timeout_killable_unsafe(*timeout);
65de872e
TM		 331 if (fatal_signal_pending(current))
332 res = -ERESTARTSYS;
333 *timeout <<= 1;
334 return res;
335}
336
337/* This is the error handling routine for processes that are allowed
338 * to sleep.
339 */
b064eca2 340static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 341{
342 struct nfs_client *clp = server->nfs_client;
9e33bed5 343 struct nfs4_state *state = exception->state;
3114ea7a 344 struct inode *inode = exception->inode;
65de872e
TM		 345 int ret = errorcode;
346
347 exception->retry = 0;
348 switch(errorcode) {
349 case 0:
350 return 0;
3114ea7a 351 case -NFS4ERR_OPENMODE:
011e2a7f 352 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 353 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 354 exception->retry = 1;
355 return 0;
356 }
357 if (state == NULL)
358 break;
5d422301
TM		 359 ret = nfs4_schedule_stateid_recovery(server, state);
360 if (ret < 0)
361 break;
3114ea7a 362 goto wait_on_recovery;
a1d0b5ee 363 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 364 case -NFS4ERR_ADMIN_REVOKED:
365 case -NFS4ERR_BAD_STATEID:
b570a975
TM		 366 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
367 nfs_remove_bad_delegation(inode);
368 exception->retry = 1;
369 break;
370 }
9e33bed5
TM		 371 if (state == NULL)
372 break;
5d422301
TM		 373 ret = nfs4_schedule_stateid_recovery(server, state);
374 if (ret < 0)
375 break;
0400a6b0 376 goto wait_on_recovery;
0ced63d1 377 case -NFS4ERR_EXPIRED:
5d422301
TM		 378 if (state != NULL) {
379 ret = nfs4_schedule_stateid_recovery(server, state);
380 if (ret < 0)
381 break;
382 }
65de872e 383 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 384 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 385 nfs4_schedule_lease_recovery(clp);
386 goto wait_on_recovery;
519ae255
CL		 387 case -NFS4ERR_MOVED:
388 ret = nfs4_schedule_migration_recovery(server);
389 if (ret < 0)
390 break;
391 goto wait_on_recovery;
03391693 392#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 393 case -NFS4ERR_BADSESSION:
394 case -NFS4ERR_BADSLOT:
395 case -NFS4ERR_BAD_HIGH_SLOT:
396 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
397 case -NFS4ERR_DEADSESSION:
398 case -NFS4ERR_SEQ_FALSE_RETRY:
399 case -NFS4ERR_SEQ_MISORDERED:
400 dprintk("%s ERROR: %d Reset session\n", __func__,
401 errorcode);
9f594791 402 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 403 goto wait_on_recovery;
03391693 404#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 405 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 406 if (exception->timeout > HZ) {
407 /* We have retried a decent amount, time to
408 * fail
409 */
410 ret = -EBUSY;
411 break;
412 }
65de872e
TM		 413 case -NFS4ERR_GRACE:
414 case -NFS4ERR_DELAY:
415 ret = nfs4_delay(server->client, &exception->timeout);
416 if (ret != 0)
417 break;
a8a4ae3a 418 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 419 case -NFS4ERR_OLD_STATEID:
420 exception->retry = 1;
b064eca2
TM		 421 break;
422 case -NFS4ERR_BADOWNER:
423 /* The following works around a Linux server bug! */
424 case -NFS4ERR_BADNAME:
425 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
426 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
427 exception->retry = 1;
428 printk(KERN_WARNING "NFS: v4 server %s "
429 "does not accept raw "
430 "uid/gids. "
431 "Reenabling the idmapper.\n",
432 server->nfs_client->cl_hostname);
433 }
65de872e
TM		 434 }
435 /* We failed to handle the error */
436 return nfs4_map_errors(ret);
0400a6b0 437wait_on_recovery:
a2c0b9e2 438 ret = nfs4_wait_clnt_recover(clp);
519ae255
CL		 439 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
440 return -EIO;
a2c0b9e2
TM		 441 if (ret == 0)
442 exception->retry = 1;
443 return ret;
65de872e
TM		 444}
445
a5250def
WAA		 446/*
447 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
448 * or 'false' otherwise.
449 */
450static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
451{
452 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
453
454 if (flavor == RPC_AUTH_GSS_KRB5I ||
455 flavor == RPC_AUTH_GSS_KRB5P)
456 return true;
457
458 return false;
459}
65de872e 460
452e9352 461static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 462{
1da177e4
LT		 463 spin_lock(&clp->cl_lock);
464 if (time_before(clp->cl_last_renewal,timestamp))
465 clp->cl_last_renewal = timestamp;
466 spin_unlock(&clp->cl_lock);
467}
468
452e9352
TM		 469static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
470{
471 do_renew_lease(server->nfs_client, timestamp);
472}
473
2a3eb2b9
CL		 474struct nfs4_call_sync_data {
475 const struct nfs_server *seq_server;
476 struct nfs4_sequence_args *seq_args;
477 struct nfs4_sequence_res *seq_res;
478};
479
a9c92d6b
CL		 480static void nfs4_init_sequence(struct nfs4_sequence_args *args,
481 struct nfs4_sequence_res *res, int cache_reply)
482{
483 args->sa_slot = NULL;
484 args->sa_cache_this = cache_reply;
485 args->sa_privileged = 0;
486
487 res->sr_slot = NULL;
488}
489
490static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
491{
492 args->sa_privileged = 1;
493}
494
3bd2384a
CL		 495static int nfs40_setup_sequence(const struct nfs_server *server,
496 struct nfs4_sequence_args *args,
497 struct nfs4_sequence_res *res,
498 struct rpc_task *task)
499{
500 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
501 struct nfs4_slot *slot;
502
503 /* slot already allocated? */
504 if (res->sr_slot != NULL)
505 goto out_start;
506
507 spin_lock(&tbl->slot_tbl_lock);
508 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
509 goto out_sleep;
510
511 slot = nfs4_alloc_slot(tbl);
512 if (IS_ERR(slot)) {
513 if (slot == ERR_PTR(-ENOMEM))
514 task->tk_timeout = HZ >> 2;
515 goto out_sleep;
516 }
517 spin_unlock(&tbl->slot_tbl_lock);
518
519 args->sa_slot = slot;
520 res->sr_slot = slot;
521
522out_start:
523 rpc_call_start(task);
524 return 0;
525
526out_sleep:
527 if (args->sa_privileged)
528 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
529 NULL, RPC_PRIORITY_PRIVILEGED);
530 else
531 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
532 spin_unlock(&tbl->slot_tbl_lock);
533 return -EAGAIN;
534}
535
536static int nfs40_sequence_done(struct rpc_task *task,
537 struct nfs4_sequence_res *res)
538{
539 struct nfs4_slot *slot = res->sr_slot;
540 struct nfs4_slot_table *tbl;
541
542 if (!RPC_WAS_SENT(task))
543 goto out;
544
545 tbl = slot->table;
546 spin_lock(&tbl->slot_tbl_lock);
547 if (!nfs41_wake_and_assign_slot(tbl, slot))
548 nfs4_free_slot(tbl, slot);
549 spin_unlock(&tbl->slot_tbl_lock);
550
551 res->sr_slot = NULL;
552out:
553 return 1;
554}
555
cccef3b9
AA		 556#if defined(CONFIG_NFS_V4_1)
557
d185a334 558static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 559{
e3725ec0 560 struct nfs4_session *session;
13615871 561 struct nfs4_slot_table *tbl;
c10e4498 562 bool send_new_highest_used_slotid = false;
13615871 563
dfb4f309 564 if (!res->sr_slot) {
13615871
AA		 565 /* just wake up the next guy waiting since
566 * we may have not consumed a slot after all */
691daf3b 567 dprintk("%s: No slot\n", __func__);
35dc1d74 568 return;
13615871 569 }
e3725ec0
TM		 570 tbl = res->sr_slot->table;
571 session = tbl->session;
ea028ac9 572
35dc1d74 573 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 574 /* Be nice to the server: try to ensure that the last transmitted
575 * value for highest_user_slotid <= target_highest_slotid
576 */
577 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
578 send_new_highest_used_slotid = true;
579
b75ad4cd
TM		 580 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
581 send_new_highest_used_slotid = false;
582 goto out_unlock;
583 }
f4af6e2a 584 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 585
586 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
587 send_new_highest_used_slotid = false;
b75ad4cd 588out_unlock:
35dc1d74 589 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 590 res->sr_slot = NULL;
c10e4498
TM		 591 if (send_new_highest_used_slotid)
592 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 593}
594
14516c3a 595static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 596{
e3725ec0 597 struct nfs4_session *session;
933602e3 598 struct nfs4_slot *slot;
14516c3a 599 struct nfs_client *clp;
ac20d163 600 bool interrupted = false;
85563073 601 int ret = 1;
b0df806c 602
468f8613
BS		 603 /* don't increment the sequence number if the task wasn't sent */
604 if (!RPC_WAS_SENT(task))
b0df806c
AA		 605 goto out;
606
933602e3 607 slot = res->sr_slot;
e3725ec0 608 session = slot->table->session;
933602e3 609
ac20d163
TM		 610 if (slot->interrupted) {
611 slot->interrupted = 0;
612 interrupted = true;
613 }
614
2f92ae34 615 trace_nfs4_sequence_done(session, res);
691daf3b 616 /* Check the SEQUENCE operation status */
14516c3a
TM		 617 switch (res->sr_status) {
618 case 0:
b0df806c 619 /* Update the slot's sequence and clientid lease timer */
933602e3 620 ++slot->seq_nr;
e3725ec0 621 clp = session->clp;
8e63b6a8 622 do_renew_lease(clp, res->sr_timestamp);
0629e370 623 /* Check sequence flags */
b4410c2f
TM		 624 if (res->sr_status_flags != 0)
625 nfs4_schedule_lease_recovery(clp);
464ee9f9 626 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 627 break;
ac20d163
TM		 628 case 1:
629 /*
630 * sr_status remains 1 if an RPC level error occurred.
631 * The server may or may not have processed the sequence
632 * operation..
633 * Mark the slot as having hosted an interrupted RPC call.
634 */
635 slot->interrupted = 1;
636 goto out;
14516c3a
TM		 637 case -NFS4ERR_DELAY:
638 /* The server detected a resend of the RPC call and
639 * returned NFS4ERR_DELAY as per Section 2.10.6.2
640 * of RFC5661.
641 */
df2fabff 642 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 643 __func__,
df2fabff 644 slot->slot_nr,
933602e3 645 slot->seq_nr);
14516c3a 646 goto out_retry;
85563073
TM		 647 case -NFS4ERR_BADSLOT:
648 /*
649 * The slot id we used was probably retired. Try again
650 * using a different slot id.
651 */
e8794440
TM		 652 goto retry_nowait;
653 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 654 /*
655 * Was the last operation on this sequence interrupted?
656 * If so, retry after bumping the sequence number.
657 */
658 if (interrupted) {
659 ++slot->seq_nr;
660 goto retry_nowait;
661 }
e8794440
TM		 662 /*
663 * Could this slot have been previously retired?
664 * If so, then the server may be expecting seq_nr = 1!
665 */
8e63b6a8
TM		 666 if (slot->seq_nr != 1) {
667 slot->seq_nr = 1;
668 goto retry_nowait;
669 }
670 break;
e8794440
TM		 671 case -NFS4ERR_SEQ_FALSE_RETRY:
672 ++slot->seq_nr;
673 goto retry_nowait;
14516c3a
TM		 674 default:
675 /* Just update the slot sequence no. */
933602e3 676 ++slot->seq_nr;
b0df806c
AA		 677 }
678out:
679 /* The session may be reset by one of the error handlers. */
680 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 681 nfs41_sequence_free_slot(res);
85563073 682 return ret;
e8794440
TM		 683retry_nowait:
684 if (rpc_restart_call_prepare(task)) {
685 task->tk_status = 0;
686 ret = 0;
687 }
688 goto out;
14516c3a 689out_retry:
d05dd4e9 690 if (!rpc_restart_call(task))
14516c3a
TM		 691 goto out;
692 rpc_delay(task, NFS4_POLL_RETRY_MAX);
693 return 0;
b0df806c
AA		 694}
695
14516c3a
TM		 696static int nfs4_sequence_done(struct rpc_task *task,
697 struct nfs4_sequence_res *res)
df896455 698{
e3725ec0 699 if (res->sr_slot == NULL)
14516c3a 700 return 1;
3bd2384a
CL		 701 if (!res->sr_slot->table->session)
702 return nfs40_sequence_done(task, res);
14516c3a 703 return nfs41_sequence_done(task, res);
df896455
TM		 704}
705
dc70d7b3 706int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 707 struct nfs4_sequence_args *args,
708 struct nfs4_sequence_res *res,
ce5039c1
AA		 709 struct rpc_task *task)
710{
fbcd4abc
AA		 711 struct nfs4_slot *slot;
712 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 713
714 dprintk("--> %s\n", __func__);
ce5039c1 715 /* slot already allocated? */
dfb4f309 716 if (res->sr_slot != NULL)
d9afbd1b 717 goto out_success;
ce5039c1 718
fbcd4abc
AA		 719 tbl = &session->fc_slot_table;
720
69d206b5
TM		 721 task->tk_timeout = 0;
722
fbcd4abc 723 spin_lock(&tbl->slot_tbl_lock);
774d5f14 724 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 725 !args->sa_privileged) {
0b1c8fc4 726 /* The state manager will wait until the slot table is empty */
0b1c8fc4 727 dprintk("%s session is draining\n", __func__);
7b939a3f 728 goto out_sleep;
689cf5c1
AB		 729 }
730
2dc03b7f 731 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 732 if (IS_ERR(slot)) {
733 /* If out of memory, try again in 1/4 second */
734 if (slot == ERR_PTR(-ENOMEM))
735 task->tk_timeout = HZ >> 2;
fbcd4abc 736 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 737 goto out_sleep;
fbcd4abc
AA		 738 }
739 spin_unlock(&tbl->slot_tbl_lock);
740
2b2fa717 741 args->sa_slot = slot;
fbcd4abc 742
e8d92382 743 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 744 slot->slot_nr, slot->seq_nr);
fbcd4abc 745
dfb4f309 746 res->sr_slot = slot;
8e63b6a8 747 res->sr_timestamp = jiffies;
2a6e26cd 748 res->sr_status_flags = 0;
fbcd4abc
AA		 749 /*
750 * sr_status is only set in decode_sequence, and so will remain
751 * set to 1 if an rpc level failure occurs.
752 */
753 res->sr_status = 1;
2f92ae34 754 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 755out_success:
756 rpc_call_start(task);
ce5039c1 757 return 0;
7b939a3f 758out_sleep:
8fe72bac
TM		 759 /* Privileged tasks are queued with top priority */
760 if (args->sa_privileged)
1e1093c7
TM		 761 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
762 NULL, RPC_PRIORITY_PRIVILEGED);
763 else
764 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 765 spin_unlock(&tbl->slot_tbl_lock);
766 return -EAGAIN;
ce5039c1 767}
dc70d7b3 768EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 769
5a580e0a
CL		 770static int nfs4_setup_sequence(const struct nfs_server *server,
771 struct nfs4_sequence_args *args,
772 struct nfs4_sequence_res *res,
773 struct rpc_task *task)
ce5039c1 774{
035168ab 775 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 776 int ret = 0;
777
3bd2384a
CL		 778 if (!session)
779 return nfs40_setup_sequence(server, args, res, task);
035168ab 780
e8d92382 781 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 782 __func__, session->clp, session, res->sr_slot ?
e8d92382 783 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 784
9d12b216 785 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 786
ce5039c1
AA		 787 dprintk("<-- %s status=%d\n", __func__, ret);
788 return ret;
789}
790
ce5039c1
AA		 791static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
792{
2a3eb2b9 793 struct nfs4_call_sync_data *data = calldata;
6ba7db34 794 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 795
035168ab
TM		 796 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
797
d9afbd1b 798 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 799}
800
69ab40c4
AA		 801static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
802{
2a3eb2b9 803 struct nfs4_call_sync_data *data = calldata;
69ab40c4 804
14516c3a 805 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 806}
807
17280175 808static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 809 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 810 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 811};
812
3bd2384a
CL		 813#else /* !CONFIG_NFS_V4_1 */
814
9915ea7e
CL		 815static int nfs4_setup_sequence(const struct nfs_server *server,
816 struct nfs4_sequence_args *args,
817 struct nfs4_sequence_res *res,
818 struct rpc_task *task)
819{
3bd2384a 820 return nfs40_setup_sequence(server, args, res, task);
9915ea7e
CL		 821}
822
823static int nfs4_sequence_done(struct rpc_task *task,
824 struct nfs4_sequence_res *res)
825{
3bd2384a 826 return nfs40_sequence_done(task, res);
9915ea7e 827}
3bd2384a
CL		 828
829#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 830
831static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
832{
833 struct nfs4_call_sync_data *data = calldata;
834 nfs4_setup_sequence(data->seq_server,
835 data->seq_args, data->seq_res, task);
836}
837
838static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
839{
840 struct nfs4_call_sync_data *data = calldata;
841 nfs4_sequence_done(task, data->seq_res);
842}
843
844static const struct rpc_call_ops nfs40_call_sync_ops = {
845 .rpc_call_prepare = nfs40_call_sync_prepare,
846 .rpc_call_done = nfs40_call_sync_done,
847};
848
7c513058
BS		 849static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
850 struct nfs_server *server,
ce5039c1
AA		 851 struct rpc_message *msg,
852 struct nfs4_sequence_args *args,
8fe72bac 853 struct nfs4_sequence_res *res)
ce5039c1
AA		 854{
855 int ret;
856 struct rpc_task *task;
9915ea7e 857 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 858 struct nfs4_call_sync_data data = {
035168ab 859 .seq_server = server,
ce5039c1
AA		 860 .seq_args = args,
861 .seq_res = res,
ce5039c1
AA		 862 };
863 struct rpc_task_setup task_setup = {
7c513058 864 .rpc_client = clnt,
ce5039c1 865 .rpc_message = msg,
9915ea7e 866 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 867 .callback_data = &data
868 };
869
ce5039c1
AA		 870 task = rpc_run_task(&task_setup);
871 if (IS_ERR(task))
872 ret = PTR_ERR(task);
873 else {
874 ret = task->tk_status;
875 rpc_put_task(task);
876 }
877 return ret;
878}
879
fd0c0953 880static
7c513058
BS		 881int nfs4_call_sync(struct rpc_clnt *clnt,
882 struct nfs_server *server,
e73b83f2
BS		 883 struct rpc_message *msg,
884 struct nfs4_sequence_args *args,
885 struct nfs4_sequence_res *res,
886 int cache_reply)
887{
a9c92d6b 888 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 889 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 890}
cccef3b9 891
38478b24 892static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 893{
38478b24 894 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 895
38478b24 896 spin_lock(&dir->i_lock);
359d7d1c 897 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 898 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 899 nfs_force_lookup_revalidate(dir);
a9a4a87a 900 dir->i_version = cinfo->after;
de242c0b 901 nfs_fscache_invalidate(dir);
38478b24 902 spin_unlock(&dir->i_lock);
1da177e4
LT		 903}
904
e56e0b78 905struct nfs4_opendata {
c6d00e63 906 struct kref kref;
e56e0b78
TM		 907 struct nfs_openargs o_arg;
908 struct nfs_openres o_res;
cdd4e68b
TM		 909 struct nfs_open_confirmargs c_arg;
910 struct nfs_open_confirmres c_res;
6926afd1
TM		 911 struct nfs4_string owner_name;
912 struct nfs4_string group_name;
e56e0b78 913 struct nfs_fattr f_attr;
1775fd3e 914 struct nfs4_label *f_label;
e56e0b78 915 struct dentry *dir;
82a2c1b7 916 struct dentry *dentry;
e56e0b78 917 struct nfs4_state_owner *owner;
aac00a8d 918 struct nfs4_state *state;
e56e0b78 919 struct iattr attrs;
26e976a8 920 unsigned long timestamp;
3e309914 921 unsigned int rpc_done : 1;
5bc2afc2 922 unsigned int file_created : 1;
bdeca1b7 923 unsigned int is_recover : 1;
24ac23ab
TM		 924 int rpc_status;
925 int cancelled;
e56e0b78
TM		 926};
927
49f9a0fa
TM		 928static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
929 int err, struct nfs4_exception *exception)
930{
931 if (err != -EINVAL)
932 return false;
933 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
934 return false;
935 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
936 exception->retry = 1;
937 return true;
938}
939
940static enum open_claim_type4
941nfs4_map_atomic_open_claim(struct nfs_server *server,
942 enum open_claim_type4 claim)
943{
944 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
945 return claim;
946 switch (claim) {
947 default:
948 return claim;
949 case NFS4_OPEN_CLAIM_FH:
950 return NFS4_OPEN_CLAIM_NULL;
951 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
952 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
953 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
954 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
955 }
956}
2ced46c2
TM		 957
958static void nfs4_init_opendata_res(struct nfs4_opendata *p)
959{
960 p->o_res.f_attr = &p->f_attr;
1775fd3e 961 p->o_res.f_label = p->f_label;
c1d51931
TM		 962 p->o_res.seqid = p->o_arg.seqid;
963 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 964 p->o_res.server = p->o_arg.server;
5f657530 965 p->o_res.access_request = p->o_arg.access;
2ced46c2 966 nfs_fattr_init(&p->f_attr);
6926afd1 967 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 968}
969
82a2c1b7 970static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 971 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 972 const struct iattr *attrs,
1775fd3e 973 struct nfs4_label *label,
4a1c0893 974 enum open_claim_type4 claim,
8535b2be 975 gfp_t gfp_mask)
e56e0b78 976{
82a2c1b7 977 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 978 struct inode *dir = parent->d_inode;
979 struct nfs_server *server = NFS_SERVER(dir);
980 struct nfs4_opendata *p;
981
8535b2be 982 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 983 if (p == NULL)
984 goto err;
14c43f76
DQ		 985
986 p->f_label = nfs4_label_alloc(server, gfp_mask);
987 if (IS_ERR(p->f_label))
988 goto err_free_p;
989
8535b2be 990 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 991 if (p->o_arg.seqid == NULL)
14c43f76 992 goto err_free_label;
82a2c1b7
AV		 993 nfs_sb_active(dentry->d_sb);
994 p->dentry = dget(dentry);
e56e0b78
TM		 995 p->dir = parent;
996 p->owner = sp;
997 atomic_inc(&sp->so_count);
dc0b027d
TM		 998 p->o_arg.open_flags = flags;
999 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 1000 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1001 * will return permission denied for all bits until close */
1002 if (!(flags & O_EXCL)) {
1003 /* ask server to check for all possible rights as results
1004 * are cached */
1005 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1006 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1007 }
7539bbab 1008 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1009 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1010 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1011 p->o_arg.name = &dentry->d_name;
e56e0b78 1012 p->o_arg.server = server;
aa9c2669 1013 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1014 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1015 p->o_arg.label = label;
49f9a0fa
TM		 1016 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1017 switch (p->o_arg.claim) {
4a1c0893
TM		 1018 case NFS4_OPEN_CLAIM_NULL:
1019 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1020 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1021 p->o_arg.fh = NFS_FH(dir);
1022 break;
1023 case NFS4_OPEN_CLAIM_PREVIOUS:
1024 case NFS4_OPEN_CLAIM_FH:
1025 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1026 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1027 p->o_arg.fh = NFS_FH(dentry->d_inode);
1028 }
536e43d1 1029 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1030 __u32 verf[2];
d77d76ff 1031
e56e0b78
TM		 1032 p->o_arg.u.attrs = &p->attrs;
1033 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1034
1035 verf[0] = jiffies;
1036 verf[1] = current->pid;
1037 memcpy(p->o_arg.u.verifier.data, verf,
1038 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1039 }
cdd4e68b
TM		 1040 p->c_arg.fh = &p->o_res.fh;
1041 p->c_arg.stateid = &p->o_res.stateid;
1042 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1043 nfs4_init_opendata_res(p);
c6d00e63 1044 kref_init(&p->kref);
e56e0b78 1045 return p;
14c43f76
DQ		 1046
1047err_free_label:
1048 nfs4_label_free(p->f_label);
1049err_free_p:
e56e0b78
TM		 1050 kfree(p);
1051err:
1052 dput(parent);
1053 return NULL;
1054}
1055
c6d00e63 1056static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1057{
c6d00e63
TM		 1058 struct nfs4_opendata *p = container_of(kref,
1059 struct nfs4_opendata, kref);
82a2c1b7 1060 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1061
1062 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1063 if (p->state != NULL)
1064 nfs4_put_open_state(p->state);
c6d00e63 1065 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1066
1067 nfs4_label_free(p->f_label);
1068
c6d00e63 1069 dput(p->dir);
82a2c1b7
AV		 1070 dput(p->dentry);
1071 nfs_sb_deactive(sb);
6926afd1 1072 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 1073 kfree(p);
1074}
1075
1076static void nfs4_opendata_put(struct nfs4_opendata *p)
1077{
1078 if (p != NULL)
1079 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1080}
1081
06f814a3
TM		 1082static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1083{
06f814a3
TM		 1084 int ret;
1085
06f814a3 1086 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1087 return ret;
1088}
1089
dc0b027d 1090static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1091{
1092 int ret = 0;
dc0b027d 1093
536e43d1 1094 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1095 goto out;
1096 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1097 case FMODE_READ:
88069f77
TM		 1098 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1099 && state->n_rdonly != 0;
6ee41268
TM		 1100 break;
1101 case FMODE_WRITE:
88069f77
TM		 1102 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1103 && state->n_wronly != 0;
6ee41268
TM		 1104 break;
1105 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1106 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1107 && state->n_rdwr != 0;
6ee41268 1108 }
dc0b027d 1109out:
6ee41268
TM		 1110 return ret;
1111}
1112
dc0b027d 1113static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1114{
652f89f6
TM		 1115 if (delegation == NULL)
1116 return 0;
dc0b027d 1117 if ((delegation->type & fmode) != fmode)
aac00a8d 1118 return 0;
15c831bf 1119 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 1120 return 0;
d25be546
TM		 1121 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1122 return 0;
b7391f44 1123 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1124 return 1;
1125}
1126
dc0b027d 1127static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1128{
dc0b027d 1129 switch (fmode) {
e7616923
TM		 1130 case FMODE_WRITE:
1131 state->n_wronly++;
1132 break;
1133 case FMODE_READ:
1134 state->n_rdonly++;
1135 break;
1136 case FMODE_READ|FMODE_WRITE:
1137 state->n_rdwr++;
1138 }
dc0b027d 1139 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1140}
1141
dc0b027d 1142static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 1143{
1144 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1145 nfs4_stateid_copy(&state->stateid, stateid);
1146 nfs4_stateid_copy(&state->open_stateid, stateid);
92b40e93 1147 set_bit(NFS_OPEN_STATE, &state->flags);
dc0b027d 1148 switch (fmode) {
003707c7
TM		 1149 case FMODE_READ:
1150 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1151 break;
1152 case FMODE_WRITE:
1153 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1154 break;
1155 case FMODE_READ|FMODE_WRITE:
1156 set_bit(NFS_O_RDWR_STATE, &state->flags);
1157 }
e7616923
TM		 1158}
1159
dc0b027d 1160static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1161{
8bda4e4c 1162 write_seqlock(&state->seqlock);
dc0b027d 1163 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1164 write_sequnlock(&state->seqlock);
003707c7
TM		 1165}
1166
dc0b027d 1167static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1168{
8bda4e4c
TM		 1169 /*
1170 * Protect the call to nfs4_state_set_mode_locked and
1171 * serialise the stateid update
1172 */
1173 write_seqlock(&state->seqlock);
003707c7 1174 if (deleg_stateid != NULL) {
f597c537 1175 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1176 set_bit(NFS_DELEGATED_STATE, &state->flags);
1177 }
1178 if (open_stateid != NULL)
dc0b027d 1179 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1180 write_sequnlock(&state->seqlock);
1181 spin_lock(&state->owner->so_lock);
dc0b027d 1182 update_open_stateflags(state, fmode);
ec073428 1183 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1184}
1185
dc0b027d 1186static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1187{
1188 struct nfs_inode *nfsi = NFS_I(state->inode);
1189 struct nfs_delegation *deleg_cur;
1190 int ret = 0;
1191
dc0b027d 1192 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1193
1194 rcu_read_lock();
1195 deleg_cur = rcu_dereference(nfsi->delegation);
1196 if (deleg_cur == NULL)
1197 goto no_delegation;
1198
1199 spin_lock(&deleg_cur->lock);
17f26b12 1200 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1201 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1202 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1203 goto no_delegation_unlock;
1204
1205 if (delegation == NULL)
1206 delegation = &deleg_cur->stateid;
f597c537 1207 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1208 goto no_delegation_unlock;
1209
b7391f44 1210 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1211 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1212 ret = 1;
1213no_delegation_unlock:
1214 spin_unlock(&deleg_cur->lock);
1215no_delegation:
1216 rcu_read_unlock();
1217
1218 if (!ret && open_stateid != NULL) {
dc0b027d 1219 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1220 ret = 1;
1221 }
1222
1223 return ret;
1224}
1225
1226
dc0b027d 1227static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1228{
1229 struct nfs_delegation *delegation;
1230
1231 rcu_read_lock();
1232 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1233 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1234 rcu_read_unlock();
1235 return;
1236 }
1237 rcu_read_unlock();
57ec14c5 1238 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1239}
1240
6ee41268 1241static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1242{
1243 struct nfs4_state *state = opendata->state;
1244 struct nfs_inode *nfsi = NFS_I(state->inode);
1245 struct nfs_delegation *delegation;
f448badd 1246 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1247 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1248 nfs4_stateid stateid;
1249 int ret = -EAGAIN;
1250
aac00a8d 1251 for (;;) {
dc0b027d 1252 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1253 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1254 if (can_open_cached(state, fmode, open_mode)) {
1255 update_open_stateflags(state, fmode);
6ee41268 1256 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1257 goto out_return_state;
1258 }
1259 spin_unlock(&state->owner->so_lock);
1260 }
34310430
TM		 1261 rcu_read_lock();
1262 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1263 if (!can_open_delegated(delegation, fmode)) {
34310430 1264 rcu_read_unlock();
aac00a8d 1265 break;
34310430 1266 }
aac00a8d 1267 /* Save the delegation */
f597c537 1268 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1269 rcu_read_unlock();
fa332941 1270 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1271 if (!opendata->is_recover) {
1272 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1273 if (ret != 0)
1274 goto out;
1275 }
aac00a8d 1276 ret = -EAGAIN;
34310430
TM		 1277
1278 /* Try to update the stateid using the delegation */
dc0b027d 1279 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1280 goto out_return_state;
aac00a8d 1281 }
aac00a8d
TM		 1282out:
1283 return ERR_PTR(ret);
1284out_return_state:
1285 atomic_inc(&state->count);
1286 return state;
1287}
1288
e23008ec
AA		 1289static void
1290nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1291{
1292 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1293 struct nfs_delegation *delegation;
1294 int delegation_flags = 0;
1295
1296 rcu_read_lock();
1297 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1298 if (delegation)
1299 delegation_flags = delegation->flags;
1300 rcu_read_unlock();
1301 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1302 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1303 "returning a delegation for "
1304 "OPEN(CLAIM_DELEGATE_CUR)\n",
1305 clp->cl_hostname);
1306 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1307 nfs_inode_set_delegation(state->inode,
1308 data->owner->so_cred,
1309 &data->o_res);
1310 else
1311 nfs_inode_reclaim_delegation(state->inode,
1312 data->owner->so_cred,
1313 &data->o_res);
1314}
1315
1316/*
1317 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1318 * and update the nfs4_state.
1319 */
1320static struct nfs4_state *
1321_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1322{
1323 struct inode *inode = data->state->inode;
1324 struct nfs4_state *state = data->state;
1325 int ret;
1326
d2bfda2e
WAA		 1327 if (!data->rpc_done) {
1328 if (data->rpc_status) {
1329 ret = data->rpc_status;
1330 goto err;
1331 }
1332 /* cached opens have already been processed */
1333 goto update;
e23008ec
AA		 1334 }
1335
e23008ec
AA		 1336 ret = nfs_refresh_inode(inode, &data->f_attr);
1337 if (ret)
1338 goto err;
1339
1340 if (data->o_res.delegation_type != 0)
1341 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1342update:
e23008ec
AA		 1343 update_open_stateid(state, &data->o_res.stateid, NULL,
1344 data->o_arg.fmode);
d49f042a 1345 atomic_inc(&state->count);
e23008ec
AA		 1346
1347 return state;
1348err:
1349 return ERR_PTR(ret);
1350
1351}
1352
1353static struct nfs4_state *
1354_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1355{
1356 struct inode *inode;
1357 struct nfs4_state *state = NULL;
1b370bc2 1358 int ret;
24ac23ab 1359
aac00a8d 1360 if (!data->rpc_done) {
6ee41268 1361 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1362 goto out;
1363 }
1364
1b370bc2 1365 ret = -EAGAIN;
24ac23ab 1366 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1367 goto err;
1775fd3e 1368 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1369 ret = PTR_ERR(inode);
03f28e3a 1370 if (IS_ERR(inode))
1b370bc2
TM		 1371 goto err;
1372 ret = -ENOMEM;
24ac23ab
TM		 1373 state = nfs4_get_open_state(inode, data->owner);
1374 if (state == NULL)
1b370bc2 1375 goto err_put_inode;
e23008ec
AA		 1376 if (data->o_res.delegation_type != 0)
1377 nfs4_opendata_check_deleg(data, state);
34310430 1378 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1379 data->o_arg.fmode);
24ac23ab 1380 iput(inode);
aac00a8d 1381out:
7aa262b5 1382 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1383 return state;
1b370bc2
TM		 1384err_put_inode:
1385 iput(inode);
1386err:
1387 return ERR_PTR(ret);
24ac23ab
TM		 1388}
1389
e23008ec
AA		 1390static struct nfs4_state *
1391nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1392{
1393 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1394 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1395 return _nfs4_opendata_to_nfs4_state(data);
1396}
1397
864472e9
TM		 1398static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1399{
1400 struct nfs_inode *nfsi = NFS_I(state->inode);
1401 struct nfs_open_context *ctx;
1402
1403 spin_lock(&state->inode->i_lock);
1404 list_for_each_entry(ctx, &nfsi->open_files, list) {
1405 if (ctx->state != state)
1406 continue;
1407 get_nfs_open_context(ctx);
1408 spin_unlock(&state->inode->i_lock);
1409 return ctx;
1410 }
1411 spin_unlock(&state->inode->i_lock);
1412 return ERR_PTR(-ENOENT);
1413}
1414
4a1c0893
TM		 1415static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1416 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1417{
1418 struct nfs4_opendata *opendata;
1419
4a1c0893 1420 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1421 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1422 if (opendata == NULL)
1423 return ERR_PTR(-ENOMEM);
1424 opendata->state = state;
1425 atomic_inc(&state->count);
1426 return opendata;
1427}
1428
dc0b027d 1429static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1430{
2ced46c2 1431 struct nfs4_state *newstate;
864472e9
TM		 1432 int ret;
1433
dc0b027d
TM		 1434 opendata->o_arg.open_flags = 0;
1435 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1436 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1437 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1438 nfs4_init_opendata_res(opendata);
b257957e 1439 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1440 if (ret != 0)
1441 return ret;
2ced46c2 1442 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1443 if (IS_ERR(newstate))
1444 return PTR_ERR(newstate);
643168c2 1445 nfs4_close_state(newstate, fmode);
2ced46c2 1446 *res = newstate;
864472e9
TM		 1447 return 0;
1448}
1449
1450static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1451{
864472e9 1452 struct nfs4_state *newstate;
864472e9
TM		 1453 int ret;
1454
1455 /* memory barrier prior to reading state->n_* */
2ced46c2 1456 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1457 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1458 smp_rmb();
1459 if (state->n_rdwr != 0) {
b0ed9dbc 1460 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1461 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1462 if (ret != 0)
1463 return ret;
2ced46c2
TM		 1464 if (newstate != state)
1465 return -ESTALE;
864472e9
TM		 1466 }
1467 if (state->n_wronly != 0) {
b0ed9dbc 1468 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1469 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1470 if (ret != 0)
1471 return ret;
2ced46c2
TM		 1472 if (newstate != state)
1473 return -ESTALE;
864472e9
TM		 1474 }
1475 if (state->n_rdonly != 0) {
b0ed9dbc 1476 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1477 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1478 if (ret != 0)
1479 return ret;
2ced46c2
TM		 1480 if (newstate != state)
1481 return -ESTALE;
864472e9 1482 }
1ac7e2fd
TM		 1483 /*
1484 * We may have performed cached opens for all three recoveries.
1485 * Check if we need to update the current stateid.
1486 */
1487 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1488 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1489 write_seqlock(&state->seqlock);
1ac7e2fd 1490 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1491 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1492 write_sequnlock(&state->seqlock);
1ac7e2fd 1493 }
864472e9
TM		 1494 return 0;
1495}
1496
1da177e4
LT		 1497/*
1498 * OPEN_RECLAIM:
1499 * reclaim state on the server after a reboot.
1da177e4 1500 */
539cd03a 1501static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1502{
1ac7e2fd 1503 struct nfs_delegation *delegation;
864472e9 1504 struct nfs4_opendata *opendata;
dc0b027d 1505 fmode_t delegation_type = 0;
1da177e4
LT		 1506 int status;
1507
4a1c0893
TM		 1508 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1509 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1510 if (IS_ERR(opendata))
1511 return PTR_ERR(opendata);
1ac7e2fd
TM		 1512 rcu_read_lock();
1513 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1514 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1515 delegation_type = delegation->type;
1ac7e2fd 1516 rcu_read_unlock();
864472e9
TM		 1517 opendata->o_arg.u.delegation_type = delegation_type;
1518 status = nfs4_open_recover(opendata, state);
c6d00e63 1519 nfs4_opendata_put(opendata);
1da177e4
LT		 1520 return status;
1521}
1522
539cd03a 1523static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1524{
1525 struct nfs_server *server = NFS_SERVER(state->inode);
1526 struct nfs4_exception exception = { };
1527 int err;
1528 do {
539cd03a 1529 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1530 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1531 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1532 continue;
168667c4 1533 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1534 break;
1535 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1536 } while (exception.retry);
1537 return err;
1538}
1539
864472e9
TM		 1540static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1541{
1542 struct nfs_open_context *ctx;
1543 int ret;
1544
1545 ctx = nfs4_state_find_open_context(state);
1546 if (IS_ERR(ctx))
91876b13 1547 return -EAGAIN;
539cd03a 1548 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1549 put_nfs_open_context(ctx);
1550 return ret;
1551}
1552
db4f2e63 1553static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1554{
be76b5b6
TM		 1555 switch (err) {
1556 default:
1557 printk(KERN_ERR "NFS: %s: unhandled error "
1558 "%d.\n", __func__, err);
1559 case 0:
1560 case -ENOENT:
1561 case -ESTALE:
1562 break;
1563 case -NFS4ERR_BADSESSION:
1564 case -NFS4ERR_BADSLOT:
1565 case -NFS4ERR_BAD_HIGH_SLOT:
1566 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1567 case -NFS4ERR_DEADSESSION:
1568 set_bit(NFS_DELEGATED_STATE, &state->flags);
1569 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1570 return -EAGAIN;
1571 case -NFS4ERR_STALE_CLIENTID:
1572 case -NFS4ERR_STALE_STATEID:
1573 set_bit(NFS_DELEGATED_STATE, &state->flags);
1574 case -NFS4ERR_EXPIRED:
1575 /* Don't recall a delegation if it was lost */
1576 nfs4_schedule_lease_recovery(server->nfs_client);
1577 return -EAGAIN;
352297b9
CL		 1578 case -NFS4ERR_MOVED:
1579 nfs4_schedule_migration_recovery(server);
1580 return -EAGAIN;
be76b5b6
TM		 1581 case -NFS4ERR_DELEG_REVOKED:
1582 case -NFS4ERR_ADMIN_REVOKED:
1583 case -NFS4ERR_BAD_STATEID:
db4f2e63 1584 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1585 nfs_inode_find_state_and_recover(state->inode,
1586 stateid);
1587 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1588 return 0;
1589 case -NFS4ERR_DELAY:
1590 case -NFS4ERR_GRACE:
1591 set_bit(NFS_DELEGATED_STATE, &state->flags);
1592 ssleep(1);
1593 return -EAGAIN;
db4f2e63
TM		 1594 case -ENOMEM:
1595 case -NFS4ERR_DENIED:
1596 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1597 return 0;
be76b5b6 1598 }
1da177e4
LT		 1599 return err;
1600}
1601
db4f2e63
TM		 1602int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1603{
1604 struct nfs_server *server = NFS_SERVER(state->inode);
1605 struct nfs4_opendata *opendata;
1606 int err;
1607
1608 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1609 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1610 if (IS_ERR(opendata))
1611 return PTR_ERR(opendata);
1612 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1613 err = nfs4_open_recover(opendata, state);
1614 nfs4_opendata_put(opendata);
1615 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1616}
1617
be05c860
CL		 1618static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1619{
1620 struct nfs4_opendata *data = calldata;
1621
1622 nfs40_setup_sequence(data->o_arg.server, &data->o_arg.seq_args,
1623 &data->o_res.seq_res, task);
1624}
1625
cdd4e68b
TM		 1626static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1627{
1628 struct nfs4_opendata *data = calldata;
1629
be05c860
CL		 1630 nfs40_sequence_done(task, &data->o_res.seq_res);
1631
cdd4e68b 1632 data->rpc_status = task->tk_status;
26e976a8 1633 if (data->rpc_status == 0) {
f597c537 1634 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1635 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1636 renew_lease(data->o_res.server, data->timestamp);
3e309914 1637 data->rpc_done = 1;
26e976a8 1638 }
cdd4e68b
TM		 1639}
1640
1641static void nfs4_open_confirm_release(void *calldata)
1642{
1643 struct nfs4_opendata *data = calldata;
1644 struct nfs4_state *state = NULL;
1645
1646 /* If this request hasn't been cancelled, do nothing */
1647 if (data->cancelled == 0)
1648 goto out_free;
1649 /* In case of error, no cleanup! */
3e309914 1650 if (!data->rpc_done)
cdd4e68b 1651 goto out_free;
cdd4e68b 1652 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1653 if (!IS_ERR(state))
643168c2 1654 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1655out_free:
c6d00e63 1656 nfs4_opendata_put(data);
cdd4e68b
TM		 1657}
1658
1659static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1660 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1661 .rpc_call_done = nfs4_open_confirm_done,
1662 .rpc_release = nfs4_open_confirm_release,
1663};
1664
1665/*
1666 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1667 */
1668static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1669{
1670 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1671 struct rpc_task *task;
5138fde0
TM		 1672 struct rpc_message msg = {
1673 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1674 .rpc_argp = &data->c_arg,
1675 .rpc_resp = &data->c_res,
1676 .rpc_cred = data->owner->so_cred,
1677 };
c970aa85
TM		 1678 struct rpc_task_setup task_setup_data = {
1679 .rpc_client = server->client,
5138fde0 1680 .rpc_message = &msg,
c970aa85
TM		 1681 .callback_ops = &nfs4_open_confirm_ops,
1682 .callback_data = data,
101070ca 1683 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1684 .flags = RPC_TASK_ASYNC,
1685 };
1da177e4
LT		 1686 int status;
1687
be05c860 1688 nfs4_init_sequence(&data->o_arg.seq_args, &data->o_res.seq_res, 1);
c6d00e63 1689 kref_get(&data->kref);
3e309914
TM		 1690 data->rpc_done = 0;
1691 data->rpc_status = 0;
5138fde0 1692 data->timestamp = jiffies;
c970aa85 1693 task = rpc_run_task(&task_setup_data);
7a1218a2 1694 if (IS_ERR(task))
cdd4e68b 1695 return PTR_ERR(task);
cdd4e68b
TM		 1696 status = nfs4_wait_for_completion_rpc_task(task);
1697 if (status != 0) {
1698 data->cancelled = 1;
1699 smp_wmb();
1700 } else
1701 status = data->rpc_status;
e6b3c4db 1702 rpc_put_task(task);
1da177e4
LT		 1703 return status;
1704}
1705
24ac23ab 1706static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1707{
24ac23ab
TM		 1708 struct nfs4_opendata *data = calldata;
1709 struct nfs4_state_owner *sp = data->owner;
549b19cc 1710 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1711
24ac23ab 1712 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1713 goto out_wait;
aac00a8d
TM		 1714 /*
1715 * Check if we still need to send an OPEN call, or if we can use
1716 * a delegation instead.
1717 */
1718 if (data->state != NULL) {
1719 struct nfs_delegation *delegation;
1720
dc0b027d 1721 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1722 goto out_no_action;
aac00a8d
TM		 1723 rcu_read_lock();
1724 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1725 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1726 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1727 can_open_delegated(delegation, data->o_arg.fmode))
1728 goto unlock_no_action;
aac00a8d
TM		 1729 rcu_read_unlock();
1730 }
95b72eb0 1731 /* Update client id. */
549b19cc 1732 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1733 switch (data->o_arg.claim) {
1734 case NFS4_OPEN_CLAIM_PREVIOUS:
1735 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1736 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1737 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1738 case NFS4_OPEN_CLAIM_FH:
1739 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1740 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1741 }
26e976a8 1742 data->timestamp = jiffies;
035168ab 1743 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1744 &data->o_arg.seq_args,
2240a9e2
TM		 1745 &data->o_res.seq_res,
1746 task) != 0)
1747 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1748
1749 /* Set the create mode (note dependency on the session type) */
1750 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1751 if (data->o_arg.open_flags & O_EXCL) {
1752 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1753 if (nfs4_has_persistent_session(clp))
1754 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1755 else if (clp->cl_mvops->minor_version > 0)
1756 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1757 }
6ee41268 1758 return;
652f89f6
TM		 1759unlock_no_action:
1760 rcu_read_unlock();
6ee41268
TM		 1761out_no_action:
1762 task->tk_action = NULL;
c8da19b9 1763out_wait:
b75ad4cd 1764 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1765}
1766
24ac23ab
TM		 1767static void nfs4_open_done(struct rpc_task *task, void *calldata)
1768{
1769 struct nfs4_opendata *data = calldata;
1da177e4 1770
24ac23ab 1771 data->rpc_status = task->tk_status;
d898528c 1772
14516c3a
TM		 1773 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1774 return;
d898528c 1775
24ac23ab 1776 if (task->tk_status == 0) {
807d66d8
TM		 1777 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1778 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1779 case S_IFREG:
1780 break;
1781 case S_IFLNK:
24ac23ab 1782 data->rpc_status = -ELOOP;
6f926b5b
TM		 1783 break;
1784 case S_IFDIR:
24ac23ab 1785 data->rpc_status = -EISDIR;
6f926b5b
TM		 1786 break;
1787 default:
24ac23ab 1788 data->rpc_status = -ENOTDIR;
807d66d8 1789 }
6f926b5b 1790 }
26e976a8 1791 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1792 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1793 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1794 }
3e309914 1795 data->rpc_done = 1;
24ac23ab 1796}
6f926b5b 1797
24ac23ab
TM		 1798static void nfs4_open_release(void *calldata)
1799{
1800 struct nfs4_opendata *data = calldata;
1801 struct nfs4_state *state = NULL;
1802
1803 /* If this request hasn't been cancelled, do nothing */
1804 if (data->cancelled == 0)
1805 goto out_free;
1806 /* In case of error, no cleanup! */
3e309914 1807 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1808 goto out_free;
1809 /* In case we need an open_confirm, no cleanup! */
1810 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1811 goto out_free;
24ac23ab 1812 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1813 if (!IS_ERR(state))
643168c2 1814 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1815out_free:
c6d00e63 1816 nfs4_opendata_put(data);
24ac23ab
TM		 1817}
1818
1819static const struct rpc_call_ops nfs4_open_ops = {
1820 .rpc_call_prepare = nfs4_open_prepare,
1821 .rpc_call_done = nfs4_open_done,
1822 .rpc_release = nfs4_open_release,
1823};
1824
b257957e 1825static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1826{
1827 struct inode *dir = data->dir->d_inode;
1828 struct nfs_server *server = NFS_SERVER(dir);
1829 struct nfs_openargs *o_arg = &data->o_arg;
1830 struct nfs_openres *o_res = &data->o_res;
1831 struct rpc_task *task;
5138fde0
TM		 1832 struct rpc_message msg = {
1833 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1834 .rpc_argp = o_arg,
1835 .rpc_resp = o_res,
1836 .rpc_cred = data->owner->so_cred,
1837 };
c970aa85
TM		 1838 struct rpc_task_setup task_setup_data = {
1839 .rpc_client = server->client,
5138fde0 1840 .rpc_message = &msg,
c970aa85
TM		 1841 .callback_ops = &nfs4_open_ops,
1842 .callback_data = data,
101070ca 1843 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1844 .flags = RPC_TASK_ASYNC,
1845 };
24ac23ab
TM		 1846 int status;
1847
a9c92d6b 1848 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1849 kref_get(&data->kref);
3e309914
TM		 1850 data->rpc_done = 0;
1851 data->rpc_status = 0;
2ced46c2 1852 data->cancelled = 0;
bdeca1b7
TM		 1853 data->is_recover = 0;
1854 if (isrecover) {
8fe72bac 1855 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1856 data->is_recover = 1;
1857 }
c970aa85 1858 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1859 if (IS_ERR(task))
1860 return PTR_ERR(task);
1861 status = nfs4_wait_for_completion_rpc_task(task);
1862 if (status != 0) {
1863 data->cancelled = 1;
1864 smp_wmb();
1865 } else
1866 status = data->rpc_status;
1867 rpc_put_task(task);
1868
1869 return status;
1870}
1871
1872static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1873{
1874 struct inode *dir = data->dir->d_inode;
1875 struct nfs_openres *o_res = &data->o_res;
1876 int status;
1877
1878 status = nfs4_run_open_task(data, 1);
1879 if (status != 0 || !data->rpc_done)
1880 return status;
1881
6926afd1
TM		 1882 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1883
b257957e
AB		 1884 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1885 status = _nfs4_proc_open_confirm(data);
1886 if (status != 0)
1887 return status;
1888 }
1889
1890 return status;
1891}
1892
6168f62c
WAA		 1893static int nfs4_opendata_access(struct rpc_cred *cred,
1894 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1895 struct nfs4_state *state, fmode_t fmode,
1896 int openflags)
6168f62c
WAA		 1897{
1898 struct nfs_access_entry cache;
1899 u32 mask;
1900
1901 /* access call failed or for some reason the server doesn't
1902 * support any access modes -- defer access call until later */
1903 if (opendata->o_res.access_supported == 0)
1904 return 0;
1905
1906 mask = 0;
bbd3a8ee 1907 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1908 * write mode bits, but POSIX allows the creating process to write.
1909 * use openflags to check for exec, because fmode won't
1910 * always have FMODE_EXEC set when file open for exec. */
1911 if (openflags & __FMODE_EXEC) {
1912 /* ONLY check for exec rights */
1913 mask = MAY_EXEC;
1914 } else if (fmode & FMODE_READ)
1915 mask = MAY_READ;
6168f62c
WAA		 1916
1917 cache.cred = cred;
1918 cache.jiffies = jiffies;
1919 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1920 nfs_access_add_cache(state->inode, &cache);
1921
bbd3a8ee 1922 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1923 return 0;
1924
1925 /* even though OPEN succeeded, access is denied. Close the file */
1926 nfs4_close_state(state, fmode);
998f40b5 1927 return -EACCES;
6168f62c
WAA		 1928}
1929
b257957e
AB		 1930/*
1931 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1932 */
1933static int _nfs4_proc_open(struct nfs4_opendata *data)
1934{
1935 struct inode *dir = data->dir->d_inode;
1936 struct nfs_server *server = NFS_SERVER(dir);
1937 struct nfs_openargs *o_arg = &data->o_arg;
1938 struct nfs_openres *o_res = &data->o_res;
1939 int status;
1940
1941 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1942 if (!data->rpc_done)
1943 return status;
1944 if (status != 0) {
1945 if (status == -NFS4ERR_BADNAME &&
1946 !(o_arg->open_flags & O_CREAT))
1947 return -ENOENT;
24ac23ab 1948 return status;
08ef7bd3 1949 }
24ac23ab 1950
6926afd1
TM		 1951 nfs_fattr_map_and_free_names(server, &data->f_attr);
1952
5bc2afc2 1953 if (o_arg->open_flags & O_CREAT) {
56ae19f3 1954 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 1955 if (o_arg->open_flags & O_EXCL)
1956 data->file_created = 1;
1957 else if (o_res->cinfo.before != o_res->cinfo.after)
1958 data->file_created = 1;
1959 }
0df5dd4a
TM		 1960 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1961 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1962 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1963 status = _nfs4_proc_open_confirm(data);
1da177e4 1964 if (status != 0)
24ac23ab 1965 return status;
1da177e4
LT		 1966 }
1967 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1775fd3e 1968 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 1969 return 0;
1da177e4
LT		 1970}
1971
d83217c1
AA		 1972static int nfs4_recover_expired_lease(struct nfs_server *server)
1973{
1974 return nfs4_client_recover_expired_lease(server->nfs_client);
1975}
1976
1da177e4
LT		 1977/*
1978 * OPEN_EXPIRED:
1979 * reclaim state on the server after a network partition.
1980 * Assumes caller holds the appropriate lock
1981 */
539cd03a 1982static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1983{
e56e0b78 1984 struct nfs4_opendata *opendata;
864472e9 1985 int ret;
1da177e4 1986
4a1c0893 1987 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1988 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1989 if (IS_ERR(opendata))
1990 return PTR_ERR(opendata);
864472e9 1991 ret = nfs4_open_recover(opendata, state);
35d05778 1992 if (ret == -ESTALE)
3d4ff43d 1993 d_drop(ctx->dentry);
c6d00e63 1994 nfs4_opendata_put(opendata);
864472e9 1995 return ret;
1da177e4
LT		 1996}
1997
a9ed2e25 1998static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1999{
539cd03a 2000 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2001 struct nfs4_exception exception = { };
2002 int err;
2003
2004 do {
539cd03a 2005 err = _nfs4_open_expired(ctx, state);
42113a75 2006 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2007 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2008 continue;
a9ed2e25
TM		 2009 switch (err) {
2010 default:
2011 goto out;
2012 case -NFS4ERR_GRACE:
2013 case -NFS4ERR_DELAY:
2014 nfs4_handle_exception(server, err, &exception);
2015 err = 0;
2016 }
202b50dc 2017 } while (exception.retry);
a9ed2e25 2018out:
202b50dc
TM		 2019 return err;
2020}
2021
1da177e4
LT		 2022static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2023{
1da177e4 2024 struct nfs_open_context *ctx;
864472e9 2025 int ret;
1da177e4 2026
864472e9
TM		 2027 ctx = nfs4_state_find_open_context(state);
2028 if (IS_ERR(ctx))
91876b13 2029 return -EAGAIN;
539cd03a 2030 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2031 put_nfs_open_context(ctx);
2032 return ret;
1da177e4
LT		 2033}
2034
f062eb6c 2035#if defined(CONFIG_NFS_V4_1)
3e60ffdd 2036static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 2037{
f062eb6c 2038 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd 2039 nfs4_stateid *stateid = &state->stateid;
ab7cb0df
TM		 2040 struct nfs_delegation *delegation;
2041 struct rpc_cred *cred = NULL;
2042 int status = -NFS4ERR_BAD_STATEID;
3e60ffdd
CL		 2043
2044 /* If a state reset has been done, test_stateid is unneeded */
2045 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2046 return;
2047
ab7cb0df
TM		 2048 /* Get the delegation credential for use by test/free_stateid */
2049 rcu_read_lock();
2050 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2051 if (delegation != NULL &&
2052 nfs4_stateid_match(&delegation->stateid, stateid)) {
2053 cred = get_rpccred(delegation->cred);
2054 rcu_read_unlock();
2055 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2056 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df
TM		 2057 } else
2058 rcu_read_unlock();
2059
3e60ffdd
CL		 2060 if (status != NFS_OK) {
2061 /* Free the stateid unless the server explicitly
2062 * informs us the stateid is unrecognized. */
2063 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2064 nfs41_free_stateid(server, stateid, cred);
6938867e 2065 nfs_remove_bad_delegation(state->inode);
3e60ffdd 2066
6938867e
BS		 2067 write_seqlock(&state->seqlock);
2068 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2069 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 2070 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2071 }
ab7cb0df
TM		 2072
2073 if (cred != NULL)
2074 put_rpccred(cred);
3e60ffdd
CL		 2075}
2076
2077/**
2078 * nfs41_check_open_stateid - possibly free an open stateid
2079 *
2080 * @state: NFSv4 state for an inode
2081 *
2082 * Returns NFS_OK if recovery for this stateid is now finished.
2083 * Otherwise a negative NFS4ERR value is returned.
2084 */
2085static int nfs41_check_open_stateid(struct nfs4_state *state)
2086{
2087 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2088 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2089 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2090 int status;
2091
2092 /* If a state reset has been done, test_stateid is unneeded */
2093 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2094 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2095 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2096 return -NFS4ERR_BAD_STATEID;
2097
ab7cb0df 2098 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2099 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2100 if (status != NFS_OK) {
2101 /* Free the stateid unless the server explicitly
2102 * informs us the stateid is unrecognized. */
2103 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2104 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2105
2106 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2107 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2108 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2109 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2110 }
2111 return status;
2112}
2113
2114static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2115{
eb64cf96 2116 int status;
b01dd1d8 2117
3e60ffdd
CL		 2118 nfs41_clear_delegation_stateid(state);
2119 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2120 if (status != NFS_OK)
2121 status = nfs4_open_expired(sp, state);
2122 return status;
f062eb6c
BS		 2123}
2124#endif
2125
aa53ed54
JL		 2126/*
2127 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2128 * fields corresponding to attributes that were used to store the verifier.
2129 * Make sure we clobber those fields in the later setattr call
2130 */
2131static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2132{
2133 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2134 !(sattr->ia_valid & ATTR_ATIME_SET))
2135 sattr->ia_valid |= ATTR_ATIME;
2136
2137 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2138 !(sattr->ia_valid & ATTR_MTIME_SET))
2139 sattr->ia_valid |= ATTR_MTIME;
2140}
2141
c21443c2
TM		 2142static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2143 fmode_t fmode,
2144 int flags,
3efb9722 2145 struct nfs_open_context *ctx)
c21443c2
TM		 2146{
2147 struct nfs4_state_owner *sp = opendata->owner;
2148 struct nfs_server *server = sp->so_server;
275bb307 2149 struct dentry *dentry;
c21443c2
TM		 2150 struct nfs4_state *state;
2151 unsigned int seq;
2152 int ret;
2153
2154 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2155
2156 ret = _nfs4_proc_open(opendata);
2157 if (ret != 0)
2158 goto out;
2159
2160 state = nfs4_opendata_to_nfs4_state(opendata);
2161 ret = PTR_ERR(state);
2162 if (IS_ERR(state))
2163 goto out;
2164 if (server->caps & NFS_CAP_POSIX_LOCK)
2165 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2166
275bb307
TM		 2167 dentry = opendata->dentry;
2168 if (dentry->d_inode == NULL) {
2169 /* FIXME: Is this d_drop() ever needed? */
2170 d_drop(dentry);
2171 dentry = d_add_unique(dentry, igrab(state->inode));
2172 if (dentry == NULL) {
2173 dentry = opendata->dentry;
2174 } else if (dentry != ctx->dentry) {
2175 dput(ctx->dentry);
2176 ctx->dentry = dget(dentry);
2177 }
2178 nfs_set_verifier(dentry,
2179 nfs_save_change_attribute(opendata->dir->d_inode));
2180 }
2181
c21443c2
TM		 2182 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2183 if (ret != 0)
2184 goto out;
2185
3efb9722 2186 ctx->state = state;
c45ffdd2
TM		 2187 if (dentry->d_inode == state->inode) {
2188 nfs_inode_attach_open_context(ctx);
2189 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2190 nfs4_schedule_stateid_recovery(server, state);
2191 }
c21443c2
TM		 2192out:
2193 return ret;
2194}
2195
1da177e4 2196/*
24ac23ab 2197 * Returns a referenced nfs4_state
1da177e4 2198 */
82be417a 2199static int _nfs4_do_open(struct inode *dir,
4197a055 2200 struct nfs_open_context *ctx,
82be417a
AA		 2201 int flags,
2202 struct iattr *sattr,
5bc2afc2
TM		 2203 struct nfs4_label *label,
2204 int *opened)
1da177e4
LT		 2205{
2206 struct nfs4_state_owner *sp;
2207 struct nfs4_state *state = NULL;
2208 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2209 struct nfs4_opendata *opendata;
4197a055
TM		 2210 struct dentry *dentry = ctx->dentry;
2211 struct rpc_cred *cred = ctx->cred;
2212 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2213 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2214 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2215 struct nfs4_label *olabel = NULL;
aac00a8d 2216 int status;
1da177e4
LT		 2217
2218 /* Protect against reboot recovery conflicts */
1da177e4 2219 status = -ENOMEM;
d1e284d5
TM		 2220 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2221 if (sp == NULL) {
1da177e4
LT		 2222 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2223 goto out_err;
2224 }
58d9714a
TM		 2225 status = nfs4_recover_expired_lease(server);
2226 if (status != 0)
b4454fe1 2227 goto err_put_state_owner;
82a2c1b7
AV		 2228 if (dentry->d_inode != NULL)
2229 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2230 status = -ENOMEM;
49f9a0fa
TM		 2231 if (dentry->d_inode)
2232 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2233 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2234 label, claim, GFP_KERNEL);
e56e0b78 2235 if (opendata == NULL)
95d35cb4 2236 goto err_put_state_owner;
1da177e4 2237
14c43f76
DQ		 2238 if (label) {
2239 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2240 if (IS_ERR(olabel)) {
2241 status = PTR_ERR(olabel);
2242 goto err_opendata_put;
2243 }
2244 }
2245
82be417a
AA		 2246 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2247 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2248 if (!opendata->f_attr.mdsthreshold)
14c43f76 2249 goto err_free_label;
1549210f 2250 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2251 }
82a2c1b7
AV		 2252 if (dentry->d_inode != NULL)
2253 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2254
3efb9722 2255 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2256 if (status != 0)
14c43f76 2257 goto err_free_label;
3efb9722 2258 state = ctx->state;
6168f62c 2259
549b19cc
TM		 2260 if ((opendata->o_arg.open_flags & O_EXCL) &&
2261 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2262 nfs4_exclusive_attrset(opendata, sattr);
2263
2264 nfs_fattr_init(opendata->o_res.f_attr);
2265 status = nfs4_do_setattr(state->inode, cred,
2266 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2267 state, label, olabel);
2268 if (status == 0) {
0ab64e0e 2269 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2270 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2271 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2272 }
0ab64e0e 2273 }
5bc2afc2
TM		 2274 if (opendata->file_created)
2275 *opened |= FILE_CREATED;
82be417a
AA		 2276
2277 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2278 *ctx_th = opendata->f_attr.mdsthreshold;
2279 else
2280 kfree(opendata->f_attr.mdsthreshold);
2281 opendata->f_attr.mdsthreshold = NULL;
2282
14c43f76
DQ		 2283 nfs4_label_free(olabel);
2284
c6d00e63 2285 nfs4_opendata_put(opendata);
1da177e4 2286 nfs4_put_state_owner(sp);
1da177e4 2287 return 0;
14c43f76
DQ		 2288err_free_label:
2289 nfs4_label_free(olabel);
c6d00e63 2290err_opendata_put:
82be417a 2291 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2292 nfs4_opendata_put(opendata);
e56e0b78
TM		 2293err_put_state_owner:
2294 nfs4_put_state_owner(sp);
1da177e4 2295out_err:
1da177e4
LT		 2296 return status;
2297}
2298
2299
82be417a 2300static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2301 struct nfs_open_context *ctx,
82be417a
AA		 2302 int flags,
2303 struct iattr *sattr,
5bc2afc2
TM		 2304 struct nfs4_label *label,
2305 int *opened)
1da177e4 2306{
49f9a0fa 2307 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2308 struct nfs4_exception exception = { };
2309 struct nfs4_state *res;
2310 int status;
2311
2312 do {
5bc2afc2 2313 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2314 res = ctx->state;
42113a75 2315 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2316 if (status == 0)
2317 break;
2318 /* NOTE: BAD_SEQID means the server and client disagree about the
2319 * book-keeping w.r.t. state-changing operations
2320 * (OPEN/CLOSE/LOCK/LOCKU...)
2321 * It is actually a sign of a bug on the client or on the server.
2322 *
2323 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2324 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2325 * have unhashed the old state_owner for us, and that we can
2326 * therefore safely retry using a new one. We should still warn
2327 * the user though...
2328 */
2329 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2330 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2331 " returned a bad sequence-id error!\n",
2332 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2333 exception.retry = 1;
2334 continue;
2335 }
550f5747
TM		 2336 /*
2337 * BAD_STATEID on OPEN means that the server cancelled our
2338 * state before it received the OPEN_CONFIRM.
2339 * Recover by retrying the request as per the discussion
2340 * on Page 181 of RFC3530.
2341 */
2342 if (status == -NFS4ERR_BAD_STATEID) {
2343 exception.retry = 1;
2344 continue;
2345 }
aac00a8d
TM		 2346 if (status == -EAGAIN) {
2347 /* We must have found a delegation */
2348 exception.retry = 1;
2349 continue;
2350 }
49f9a0fa
TM		 2351 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2352 continue;
2353 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2354 status, &exception));
2355 } while (exception.retry);
2356 return res;
2357}
2358
659bfcd6
TM		 2359static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2360 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2361 struct nfs4_state *state, struct nfs4_label *ilabel,
2362 struct nfs4_label *olabel)
1da177e4 2363{
3e4f6290 2364 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2365 struct nfs_setattrargs arg = {
3e4f6290 2366 .fh = NFS_FH(inode),
1da177e4
LT		 2367 .iap = sattr,
2368 .server = server,
2369 .bitmask = server->attr_bitmask,
1775fd3e 2370 .label = ilabel,
1da177e4
LT		 2371 };
2372 struct nfs_setattrres res = {
2373 .fattr = fattr,
1775fd3e 2374 .label = olabel,
1da177e4
LT		 2375 .server = server,
2376 };
2377 struct rpc_message msg = {
659bfcd6
TM		 2378 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2379 .rpc_argp = &arg,
2380 .rpc_resp = &res,
2381 .rpc_cred = cred,
1da177e4 2382 };
26e976a8 2383 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2384 fmode_t fmode;
2385 bool truncate;
65e4308d 2386 int status;
1da177e4 2387
aa9c2669
DQ		 2388 arg.bitmask = nfs4_bitmask(server, ilabel);
2389 if (ilabel)
2390 arg.bitmask = nfs4_bitmask(server, olabel);
2391
0e574af1 2392 nfs_fattr_init(fattr);
1da177e4 2393
ee3ae84e
TM		 2394 /* Servers should only apply open mode checks for file size changes */
2395 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2396 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2397
2398 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2399 /* Use that stateid */
2400 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2401 struct nfs_lockowner lockowner = {
2402 .l_owner = current->files,
2403 .l_pid = current->tgid,
2404 };
4fc8796d 2405 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2406 &lockowner);
08e9eac4 2407 } else
f597c537 2408 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2409
7c513058 2410 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2411 if (status == 0 && state != NULL)
2412 renew_lease(server, timestamp);
65e4308d 2413 return status;
1da177e4
LT		 2414}
2415
659bfcd6
TM		 2416static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2417 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2418 struct nfs4_state *state, struct nfs4_label *ilabel,
2419 struct nfs4_label *olabel)
1da177e4 2420{
3e4f6290 2421 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2422 struct nfs4_exception exception = {
2423 .state = state,
3114ea7a 2424 .inode = inode,
a1d0b5ee 2425 };
1da177e4
LT		 2426 int err;
2427 do {
1775fd3e 2428 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2429 trace_nfs4_setattr(inode, err);
451146be
TM		 2430 switch (err) {
2431 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2432 if (!(sattr->ia_valid & ATTR_SIZE)) {
2433 pr_warn_once("NFSv4: server %s is incorrectly "
2434 "applying open mode checks to "
2435 "a SETATTR that is not "
2436 "changing file size.\n",
2437 server->nfs_client->cl_hostname);
2438 }
451146be
TM		 2439 if (state && !(state->state & FMODE_WRITE)) {
2440 err = -EBADF;
2441 if (sattr->ia_valid & ATTR_OPEN)
2442 err = -EACCES;
2443 goto out;
2444 }
2445 }
2446 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2447 } while (exception.retry);
451146be 2448out:
1da177e4
LT		 2449 return err;
2450}
2451
2452struct nfs4_closedata {
2453 struct inode *inode;
2454 struct nfs4_state *state;
2455 struct nfs_closeargs arg;
2456 struct nfs_closeres res;
516a6af6 2457 struct nfs_fattr fattr;
26e976a8 2458 unsigned long timestamp;
f7e8917a
FI		 2459 bool roc;
2460 u32 roc_barrier;
1da177e4
LT		 2461};
2462
963d8fe5 2463static void nfs4_free_closedata(void *data)
9512135d 2464{
963d8fe5
TM		 2465 struct nfs4_closedata *calldata = data;
2466 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2467 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2468
f7e8917a
FI		 2469 if (calldata->roc)
2470 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2471 nfs4_put_open_state(calldata->state);
2472 nfs_free_seqid(calldata->arg.seqid);
9512135d 2473 nfs4_put_state_owner(sp);
322b2b90 2474 nfs_sb_deactive(sb);
9512135d
TM		 2475 kfree(calldata);
2476}
2477
88069f77
TM		 2478static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2479 fmode_t fmode)
2480{
2481 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2482 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2483 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2484 case FMODE_WRITE:
88069f77 2485 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2486 break;
2487 case FMODE_READ:
88069f77 2488 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2489 break;
2490 case 0:
2491 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2492 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2493 clear_bit(NFS_OPEN_STATE, &state->flags);
2494 }
88069f77
TM		 2495 spin_unlock(&state->owner->so_lock);
2496}
2497
963d8fe5 2498static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2499{
963d8fe5 2500 struct nfs4_closedata *calldata = data;
1da177e4 2501 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2502 struct nfs_server *server = NFS_SERVER(calldata->inode);
2503
a3ca5651 2504 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2505 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2506 return;
42113a75 2507 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2508 /* hmm. we are done with the inode, and in the process of freeing
2509 * the state_owner. we keep this around to process errors
2510 */
1da177e4
LT		 2511 switch (task->tk_status) {
2512 case 0:
f7e8917a
FI		 2513 if (calldata->roc)
2514 pnfs_roc_set_barrier(state->inode,
2515 calldata->roc_barrier);
45328c35 2516 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2517 renew_lease(server, calldata->timestamp);
88069f77
TM		 2518 nfs4_close_clear_stateid_flags(state,
2519 calldata->arg.fmode);
1da177e4
LT		 2520 break;
2521 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2522 case -NFS4ERR_OLD_STATEID:
2523 case -NFS4ERR_BAD_STATEID:
1da177e4 2524 case -NFS4ERR_EXPIRED:
dc0b027d 2525 if (calldata->arg.fmode == 0)
9e33bed5 2526 break;
1da177e4 2527 default:
72211dbe
TM		 2528 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2529 rpc_restart_call_prepare(task);
1da177e4 2530 }
72211dbe 2531 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2532 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2533 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2534}
2535
4ce70ada 2536static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2537{
4ce70ada 2538 struct nfs4_closedata *calldata = data;
9512135d 2539 struct nfs4_state *state = calldata->state;
7fdab069 2540 struct inode *inode = calldata->inode;
88069f77 2541 int call_close = 0;
9512135d 2542
a3ca5651 2543 dprintk("%s: begin!\n", __func__);
963d8fe5 2544 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2545 goto out_wait;
003707c7 2546
88069f77
TM		 2547 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2548 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2549 spin_lock(&state->owner->so_lock);
003707c7 2550 /* Calculate the change in open mode */
e7616923 2551 if (state->n_rdwr == 0) {
003707c7 2552 if (state->n_rdonly == 0) {
88069f77
TM		 2553 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2554 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2555 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2556 }
2557 if (state->n_wronly == 0) {
88069f77
TM		 2558 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2559 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2560 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2561 }
e7616923 2562 }
5d422301
TM		 2563 if (!nfs4_valid_open_stateid(state))
2564 call_close = 0;
4cecb76f 2565 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2566
2567 if (!call_close) {
963d8fe5 2568 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2569 goto out_no_action;
9512135d 2570 }
88069f77 2571
f7e8917a 2572 if (calldata->arg.fmode == 0) {
88069f77 2573 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2574 if (calldata->roc &&
b9536ad5
AA		 2575 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2576 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2577 goto out_wait;
b9536ad5 2578 }
f7e8917a 2579 }
88069f77 2580
516a6af6 2581 nfs_fattr_init(calldata->res.fattr);
26e976a8 2582 calldata->timestamp = jiffies;
7fdab069 2583 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2584 &calldata->arg.seq_args,
2585 &calldata->res.seq_res,
2240a9e2
TM		 2586 task) != 0)
2587 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2588 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2589 return;
2590out_no_action:
2591 task->tk_action = NULL;
2592out_wait:
2593 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2594}
2595
963d8fe5 2596static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2597 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2598 .rpc_call_done = nfs4_close_done,
2599 .rpc_release = nfs4_free_closedata,
2600};
2601
1da177e4
LT		 2602/*
2603 * It is possible for data to be read/written from a mem-mapped file
2604 * after the sys_close call (which hits the vfs layer as a flush).
2605 * This means that we can't safely call nfsv4 close on a file until
2606 * the inode is cleared. This in turn means that we are not good
2607 * NFSv4 citizens - we do not indicate to the server to update the file's
2608 * share state even when we are done with one of the three share
2609 * stateid's in the inode.
2610 *
2611 * NOTE: Caller must be holding the sp->so_owner semaphore!
2612 */
1f7977c1 2613int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2614{
4a35bd41 2615 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2616 struct nfs4_closedata *calldata;
b39e625b
TM		 2617 struct nfs4_state_owner *sp = state->owner;
2618 struct rpc_task *task;
5138fde0
TM		 2619 struct rpc_message msg = {
2620 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2621 .rpc_cred = state->owner->so_cred,
2622 };
c970aa85
TM		 2623 struct rpc_task_setup task_setup_data = {
2624 .rpc_client = server->client,
5138fde0 2625 .rpc_message = &msg,
c970aa85 2626 .callback_ops = &nfs4_close_ops,
101070ca 2627 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2628 .flags = RPC_TASK_ASYNC,
2629 };
9512135d 2630 int status = -ENOMEM;
1da177e4 2631
fa940720
WAA		 2632 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2633 &task_setup_data.rpc_client, &msg);
2634
8535b2be 2635 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2636 if (calldata == NULL)
9512135d 2637 goto out;
a9c92d6b 2638 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2639 calldata->inode = state->inode;
1da177e4 2640 calldata->state = state;
4a35bd41 2641 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2642 calldata->arg.stateid = &state->open_stateid;
1da177e4 2643 /* Serialization for the sequence id */
8535b2be 2644 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2645 if (calldata->arg.seqid == NULL)
2646 goto out_free_calldata;
dc0b027d 2647 calldata->arg.fmode = 0;
a65318bf 2648 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2649 calldata->res.fattr = &calldata->fattr;
c1d51931 2650 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2651 calldata->res.server = server;
1f7977c1 2652 calldata->roc = pnfs_roc(state->inode);
643168c2 2653 nfs_sb_active(calldata->inode->i_sb);
9512135d 2654
1174dd1f
TM		 2655 msg.rpc_argp = &calldata->arg;
2656 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2657 task_setup_data.callback_data = calldata;
2658 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2659 if (IS_ERR(task))
2660 return PTR_ERR(task);
a49c3c77
TM		 2661 status = 0;
2662 if (wait)
2663 status = rpc_wait_for_completion_task(task);
b39e625b 2664 rpc_put_task(task);
a49c3c77 2665 return status;
9512135d
TM		 2666out_free_calldata:
2667 kfree(calldata);
2668out:
b39e625b
TM		 2669 nfs4_put_open_state(state);
2670 nfs4_put_state_owner(sp);
9512135d 2671 return status;
1da177e4
LT		 2672}
2673
2b484297 2674static struct inode *
5bc2afc2
TM		 2675nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2676 int open_flags, struct iattr *attr, int *opened)
1da177e4 2677{
1da177e4 2678 struct nfs4_state *state;
aa9c2669
DQ		 2679 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2680
2681 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2682
565277f6 2683 /* Protect against concurrent sillydeletes */
5bc2afc2 2684 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2685
2686 nfs4_label_release_security(label);
2687
f46e0bd3
TM		 2688 if (IS_ERR(state))
2689 return ERR_CAST(state);
275bb307 2690 return state->inode;
1da177e4
LT		 2691}
2692
1185a552 2693static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2694{
2695 if (ctx->state == NULL)
2696 return;
2697 if (is_sync)
643168c2 2698 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2699 else
643168c2 2700 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2701}
1da177e4
LT		 2702
2703static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2704{
43652ad5
BH		 2705 struct nfs4_server_caps_arg args = {
2706 .fhandle = fhandle,
2707 };
1da177e4
LT		 2708 struct nfs4_server_caps_res res = {};
2709 struct rpc_message msg = {
2710 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2711 .rpc_argp = &args,
1da177e4
LT		 2712 .rpc_resp = &res,
2713 };
2714 int status;
2715
7c513058 2716 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2717 if (status == 0) {
2718 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2719 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2720 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2721 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2722 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2723 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2724 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2725 server->caps |= NFS_CAP_ACLS;
2726 if (res.has_links != 0)
2727 server->caps |= NFS_CAP_HARDLINKS;
2728 if (res.has_symlinks != 0)
2729 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2730 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2731 server->caps |= NFS_CAP_FILEID;
2732 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2733 server->caps |= NFS_CAP_MODE;
2734 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2735 server->caps |= NFS_CAP_NLINK;
2736 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2737 server->caps |= NFS_CAP_OWNER;
2738 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2739 server->caps |= NFS_CAP_OWNER_GROUP;
2740 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2741 server->caps |= NFS_CAP_ATIME;
2742 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2743 server->caps |= NFS_CAP_CTIME;
2744 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2745 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2746#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2747 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2748 server->caps |= NFS_CAP_SECURITY_LABEL;
2749#endif
2750 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2751 sizeof(server->attr_bitmask));
62ab460c 2752
aa9c2669
DQ		 2753 if (server->caps & NFS_CAP_SECURITY_LABEL) {
2754 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2755 res.attr_bitmask[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2756 }
a65318bf
TM		 2757 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2758 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2759 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2760 server->acl_bitmask = res.acl_bitmask;
264e6351 2761 server->fh_expire_type = res.fh_expire_type;
1da177e4 2762 }
cccef3b9 2763
1da177e4
LT		 2764 return status;
2765}
2766
55a97593 2767int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2768{
2769 struct nfs4_exception exception = { };
2770 int err;
2771 do {
2772 err = nfs4_handle_exception(server,
2773 _nfs4_server_capabilities(server, fhandle),
2774 &exception);
2775 } while (exception.retry);
2776 return err;
2777}
2778
2779static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2780 struct nfs_fsinfo *info)
2781{
aa9c2669 2782 u32 bitmask[3];
1da177e4 2783 struct nfs4_lookup_root_arg args = {
aa9c2669 2784 .bitmask = bitmask,
1da177e4
LT		 2785 };
2786 struct nfs4_lookup_res res = {
2787 .server = server,
0e574af1 2788 .fattr = info->fattr,
1da177e4
LT		 2789 .fh = fhandle,
2790 };
2791 struct rpc_message msg = {
2792 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2793 .rpc_argp = &args,
2794 .rpc_resp = &res,
2795 };
008f55d0 2796
aa9c2669
DQ		 2797 bitmask[0] = nfs4_fattr_bitmap[0];
2798 bitmask[1] = nfs4_fattr_bitmap[1];
2799 /*
2800 * Process the label in the upcoming getfattr
2801 */
2802 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2803
0e574af1 2804 nfs_fattr_init(info->fattr);
7c513058 2805 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2806}
2807
2808static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2809 struct nfs_fsinfo *info)
2810{
2811 struct nfs4_exception exception = { };
2812 int err;
2813 do {
fb8a5ba8 2814 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2815 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2816 switch (err) {
2817 case 0:
2818 case -NFS4ERR_WRONGSEC:
05e9cfb4 2819 goto out;
fb8a5ba8
BS		 2820 default:
2821 err = nfs4_handle_exception(server, err, &exception);
2822 }
1da177e4 2823 } while (exception.retry);
05e9cfb4 2824out:
1da177e4
LT		 2825 return err;
2826}
2827
8f70e95f
BS		 2828static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2829 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2830{
c2190661
TM		 2831 struct rpc_auth_create_args auth_args = {
2832 .pseudoflavor = flavor,
2833 };
8f70e95f
BS		 2834 struct rpc_auth *auth;
2835 int ret;
2836
c2190661 2837 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 2838 if (IS_ERR(auth)) {
75bc8821 2839 ret = -EACCES;
8f70e95f
BS		 2840 goto out;
2841 }
2842 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2843out:
2844 return ret;
2845}
2846
9a744ba3
CL		 2847/*
2848 * Retry pseudoroot lookup with various security flavors. We do this when:
2849 *
2850 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2851 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2852 *
2853 * Returns zero on success, or a negative NFS4ERR value, or a
2854 * negative errno value.
2855 */
801a16dc 2856static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2857 struct nfs_fsinfo *info)
1da177e4 2858{
9a744ba3
CL		 2859 /* Per 3530bis 15.33.5 */
2860 static const rpc_authflavor_t flav_array[] = {
2861 RPC_AUTH_GSS_KRB5P,
2862 RPC_AUTH_GSS_KRB5I,
2863 RPC_AUTH_GSS_KRB5,
c4eafe11 2864 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2865 RPC_AUTH_NULL,
2866 };
2867 int status = -EPERM;
2868 size_t i;
6a1a1e34 2869
9a744ba3 2870 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2871 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2872 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2873 continue;
2874 break;
8f70e95f 2875 }
9a744ba3 2876
fb8a5ba8
BS		 2877 /*
2878 * -EACCESS could mean that the user doesn't have correct permissions
2879 * to access the mount. It could also mean that we tried to mount
2880 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2881 * existing mount programs don't handle -EACCES very well so it should
2882 * be mapped to -EPERM instead.
2883 */
2884 if (status == -EACCES)
2885 status = -EPERM;
801a16dc
BS		 2886 return status;
2887}
2888
2ed4b95b
CL		 2889static int nfs4_do_find_root_sec(struct nfs_server *server,
2890 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2891{
2892 int mv = server->nfs_client->cl_minorversion;
2893 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2894}
2895
2896/**
2897 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2898 * @server: initialized nfs_server handle
2899 * @fhandle: we fill in the pseudo-fs root file handle
2900 * @info: we fill in an FSINFO struct
5e6b1990 2901 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 2902 *
2903 * Returns zero on success, or a negative errno.
801a16dc 2904 */
3028eb2b 2905int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 2906 struct nfs_fsinfo *info,
2907 bool auth_probe)
801a16dc 2908{
2ed4b95b
CL		 2909 int status;
2910
5e6b1990
TM		 2911 switch (auth_probe) {
2912 case false:
2913 status = nfs4_lookup_root(server, fhandle, info);
2914 if (status != -NFS4ERR_WRONGSEC)
2915 break;
2916 /* Did user force a 'sec=' mount option? */
2917 if (server->flags & NFS_MOUNT_SECFLAVOUR)
2918 break;
2919 default:
2ed4b95b 2920 status = nfs4_do_find_root_sec(server, fhandle, info);
5e6b1990 2921 }
2ed4b95b 2922
1da177e4
LT		 2923 if (status == 0)
2924 status = nfs4_server_capabilities(server, fhandle);
2925 if (status == 0)
2926 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2927
c12e87f4 2928 return nfs4_map_errors(status);
1da177e4
LT		 2929}
2930
bae36241
BS		 2931static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2932 struct nfs_fsinfo *info)
2933{
2934 int error;
2935 struct nfs_fattr *fattr = info->fattr;
1775fd3e 2936 struct nfs4_label *label = NULL;
bae36241
BS		 2937
2938 error = nfs4_server_capabilities(server, mntfh);
2939 if (error < 0) {
2940 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2941 return error;
2942 }
2943
14c43f76
DQ		 2944 label = nfs4_label_alloc(server, GFP_KERNEL);
2945 if (IS_ERR(label))
2946 return PTR_ERR(label);
2947
1775fd3e 2948 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 2949 if (error < 0) {
2950 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 2951 goto err_free_label;
bae36241
BS		 2952 }
2953
2954 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2955 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2956 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2957
14c43f76
DQ		 2958err_free_label:
2959 nfs4_label_free(label);
2960
bae36241
BS		 2961 return error;
2962}
2963
6b97fd3d
MN		 2964/*
2965 * Get locations and (maybe) other attributes of a referral.
2966 * Note that we'll actually follow the referral later when
2967 * we detect fsid mismatch in inode revalidation
2968 */
f05d147f
BS		 2969static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2970 const struct qstr *name, struct nfs_fattr *fattr,
2971 struct nfs_fh *fhandle)
6b97fd3d
MN		 2972{
2973 int status = -ENOMEM;
2974 struct page *page = NULL;
2975 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2976
2977 page = alloc_page(GFP_KERNEL);
2978 if (page == NULL)
2979 goto out;
2980 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2981 if (locations == NULL)
2982 goto out;
2983
f05d147f 2984 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2985 if (status != 0)
2986 goto out;
519ae255
CL		 2987
2988 /*
2989 * If the fsid didn't change, this is a migration event, not a
2990 * referral. Cause us to drop into the exception handler, which
2991 * will kick off migration recovery.
2992 */
6b97fd3d 2993 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2994 dprintk("%s: server did not return a different fsid for"
2995 " a referral at %s\n", __func__, name->name);
519ae255 2996 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 2997 goto out;
2998 }
533eb461
AA		 2999 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3000 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3001
533eb461 3002 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3003 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3004 memset(fhandle, 0, sizeof(struct nfs_fh));
3005out:
3006 if (page)
3007 __free_page(page);
5d7ca35a 3008 kfree(locations);
6b97fd3d
MN		 3009 return status;
3010}
3011
1775fd3e
DQ		 3012static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3013 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3014{
3015 struct nfs4_getattr_arg args = {
3016 .fh = fhandle,
3017 .bitmask = server->attr_bitmask,
3018 };
3019 struct nfs4_getattr_res res = {
3020 .fattr = fattr,
1775fd3e 3021 .label = label,
1da177e4
LT		 3022 .server = server,
3023 };
3024 struct rpc_message msg = {
3025 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3026 .rpc_argp = &args,
3027 .rpc_resp = &res,
3028 };
aa9c2669
DQ		 3029
3030 args.bitmask = nfs4_bitmask(server, label);
3031
0e574af1 3032 nfs_fattr_init(fattr);
7c513058 3033 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3034}
3035
1775fd3e
DQ		 3036static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3037 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3038{
3039 struct nfs4_exception exception = { };
3040 int err;
3041 do {
b5f875a9
TM		 3042 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3043 trace_nfs4_getattr(server, fhandle, fattr, err);
3044 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3045 &exception);
3046 } while (exception.retry);
3047 return err;
3048}
3049
3050/*
3051 * The file is not closed if it is opened due to the a request to change
3052 * the size of the file. The open call will not be needed once the
3053 * VFS layer lookup-intents are implemented.
3054 *
3055 * Close is called when the inode is destroyed.
3056 * If we haven't opened the file for O_WRONLY, we
3057 * need to in the size_change case to obtain a stateid.
3058 *
3059 * Got race?
3060 * Because OPEN is always done by name in nfsv4, it is
3061 * possible that we opened a different file by the same
3062 * name. We can recognize this race condition, but we
3063 * can't do anything about it besides returning an error.
3064 *
3065 * This will be fixed with VFS changes (lookup-intent).
3066 */
3067static int
3068nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3069 struct iattr *sattr)
3070{
08e9eac4 3071 struct inode *inode = dentry->d_inode;
659bfcd6 3072 struct rpc_cred *cred = NULL;
d530838b 3073 struct nfs4_state *state = NULL;
14c43f76 3074 struct nfs4_label *label = NULL;
1da177e4
LT		 3075 int status;
3076
8a1636c4 3077 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 3078 pnfs_commit_and_return_layout(inode);
8a1636c4 3079
0e574af1 3080 nfs_fattr_init(fattr);
1da177e4 3081
2669940d
AA		 3082 /* Deal with open(O_TRUNC) */
3083 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3084 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3085
3086 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3087 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3088 return 0;
3089
d530838b 3090 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3091 if (sattr->ia_valid & ATTR_FILE) {
3092 struct nfs_open_context *ctx;
3093
3094 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3095 if (ctx) {
3096 cred = ctx->cred;
3097 state = ctx->state;
3098 }
659bfcd6 3099 }
08e9eac4 3100
14c43f76
DQ		 3101 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3102 if (IS_ERR(label))
3103 return PTR_ERR(label);
3104
3105 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3106 if (status == 0) {
65e4308d 3107 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 3108 nfs_setsecurity(inode, fattr, label);
3109 }
14c43f76 3110 nfs4_label_free(label);
1da177e4
LT		 3111 return status;
3112}
3113
0c2e53f1
TM		 3114static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3115 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3116 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3117{
0c2e53f1 3118 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3119 int status;
3120 struct nfs4_lookup_arg args = {
3121 .bitmask = server->attr_bitmask,
0c2e53f1 3122 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3123 .name = name,
3124 };
3125 struct nfs4_lookup_res res = {
3126 .server = server,
3127 .fattr = fattr,
aa9c2669 3128 .label = label,
2b3de441
DH		 3129 .fh = fhandle,
3130 };
3131 struct rpc_message msg = {
3132 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3133 .rpc_argp = &args,
3134 .rpc_resp = &res,
3135 };
3136
aa9c2669
DQ		 3137 args.bitmask = nfs4_bitmask(server, label);
3138
2b3de441
DH		 3139 nfs_fattr_init(fattr);
3140
1da177e4 3141 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3142 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3143 dprintk("NFS reply lookup: %d\n", status);
3144 return status;
3145}
3146
72de53ec 3147static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3148{
7ebb9315 3149 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3150 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3151 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3152 fattr->nlink = 2;
3153}
3154
72de53ec
BS		 3155static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3156 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3157 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3158{
3159 struct nfs4_exception exception = { };
72de53ec 3160 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3161 int err;
3162 do {
1775fd3e 3163 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3164 trace_nfs4_lookup(dir, name, err);
72de53ec 3165 switch (err) {
08ef7bd3 3166 case -NFS4ERR_BADNAME:
72de53ec
BS		 3167 err = -ENOENT;
3168 goto out;
0c2e53f1 3169 case -NFS4ERR_MOVED:
f05d147f 3170 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3171 goto out;
0c2e53f1 3172 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3173 err = -EPERM;
3174 if (client != *clnt)
3175 goto out;
41d058c3
TM		 3176 /* No security negotiation if the user specified 'sec=' */
3177 if (NFS_SERVER(dir)->flags & NFS_MOUNT_SECFLAVOUR)
3178 goto out;
72de53ec
BS		 3179 client = nfs4_create_sec_client(client, dir, name);
3180 if (IS_ERR(client))
3181 return PTR_ERR(client);
3182
3183 exception.retry = 1;
3184 break;
3185 default:
3186 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3187 }
1da177e4 3188 } while (exception.retry);
72de53ec
BS		 3189
3190out:
3191 if (err == 0)
3192 *clnt = client;
3193 else if (client != *clnt)
3194 rpc_shutdown_client(client);
3195
1da177e4
LT		 3196 return err;
3197}
3198
80a16b21 3199static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3200 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3201 struct nfs4_label *label)
72de53ec
BS		 3202{
3203 int status;
3204 struct rpc_clnt *client = NFS_CLIENT(dir);
3205
1775fd3e 3206 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3207 if (client != NFS_CLIENT(dir)) {
3208 rpc_shutdown_client(client);
3209 nfs_fixup_secinfo_attributes(fattr);
3210 }
3211 return status;
3212}
3213
f05d147f
BS		 3214struct rpc_clnt *
3215nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3216 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3217{
b72888cb 3218 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3219 int status;
f05d147f 3220
1775fd3e 3221 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3222 if (status < 0)
f05d147f 3223 return ERR_PTR(status);
b72888cb 3224 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3225}
3226
1da177e4
LT		 3227static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3228{
76b32999 3229 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3230 struct nfs4_accessargs args = {
3231 .fh = NFS_FH(inode),
a4980e78 3232 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3233 };
3234 struct nfs4_accessres res = {
3235 .server = server,
1da177e4 3236 };
1da177e4
LT		 3237 struct rpc_message msg = {
3238 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3239 .rpc_argp = &args,
3240 .rpc_resp = &res,
3241 .rpc_cred = entry->cred,
3242 };
3243 int mode = entry->mask;
aa9c2669 3244 int status = 0;
1da177e4
LT		 3245
3246 /*
3247 * Determine which access bits we want to ask for...
3248 */
3249 if (mode & MAY_READ)
3250 args.access |= NFS4_ACCESS_READ;
3251 if (S_ISDIR(inode->i_mode)) {
3252 if (mode & MAY_WRITE)
3253 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3254 if (mode & MAY_EXEC)
3255 args.access |= NFS4_ACCESS_LOOKUP;
3256 } else {
3257 if (mode & MAY_WRITE)
3258 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3259 if (mode & MAY_EXEC)
3260 args.access |= NFS4_ACCESS_EXECUTE;
3261 }
c407d41a
TM		 3262
3263 res.fattr = nfs_alloc_fattr();
3264 if (res.fattr == NULL)
3265 return -ENOMEM;
3266
7c513058 3267 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3268 if (!status) {
6168f62c 3269 nfs_access_set_mask(entry, res.access);
c407d41a 3270 nfs_refresh_inode(inode, res.fattr);
1da177e4 3271 }
c407d41a 3272 nfs_free_fattr(res.fattr);
1da177e4
LT		 3273 return status;
3274}
3275
3276static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3277{
3278 struct nfs4_exception exception = { };
3279 int err;
3280 do {
c1578b76
TM		 3281 err = _nfs4_proc_access(inode, entry);
3282 trace_nfs4_access(inode, err);
3283 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3284 &exception);
3285 } while (exception.retry);
3286 return err;
3287}
3288
3289/*
3290 * TODO: For the time being, we don't try to get any attributes
3291 * along with any of the zero-copy operations READ, READDIR,
3292 * READLINK, WRITE.
3293 *
3294 * In the case of the first three, we want to put the GETATTR
3295 * after the read-type operation -- this is because it is hard
3296 * to predict the length of a GETATTR response in v4, and thus
3297 * align the READ data correctly. This means that the GETATTR
3298 * may end up partially falling into the page cache, and we should
3299 * shift it into the 'tail' of the xdr_buf before processing.
3300 * To do this efficiently, we need to know the total length
3301 * of data received, which doesn't seem to be available outside
3302 * of the RPC layer.
3303 *
3304 * In the case of WRITE, we also want to put the GETATTR after
3305 * the operation -- in this case because we want to make sure
140150db 3306 * we get the post-operation mtime and size.
1da177e4
LT		 3307 *
3308 * Both of these changes to the XDR layer would in fact be quite
3309 * minor, but I decided to leave them for a subsequent patch.
3310 */
3311static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3312 unsigned int pgbase, unsigned int pglen)
3313{
3314 struct nfs4_readlink args = {
3315 .fh = NFS_FH(inode),
3316 .pgbase = pgbase,
3317 .pglen = pglen,
3318 .pages = &page,
3319 };
f50c7000 3320 struct nfs4_readlink_res res;
1da177e4
LT		 3321 struct rpc_message msg = {
3322 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3323 .rpc_argp = &args,
f50c7000 3324 .rpc_resp = &res,
1da177e4
LT		 3325 };
3326
7c513058 3327 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3328}
3329
3330static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3331 unsigned int pgbase, unsigned int pglen)
3332{
3333 struct nfs4_exception exception = { };
3334 int err;
3335 do {
c1578b76
TM		 3336 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3337 trace_nfs4_readlink(inode, err);
3338 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3339 &exception);
3340 } while (exception.retry);
3341 return err;
3342}
3343
1da177e4 3344/*
8867fe58 3345 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3346 */
1da177e4
LT		 3347static int
3348nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3349 int flags)
1da177e4 3350{
aa9c2669 3351 struct nfs4_label l, *ilabel = NULL;
8867fe58 3352 struct nfs_open_context *ctx;
1da177e4 3353 struct nfs4_state *state;
5bc2afc2 3354 int opened = 0;
1da177e4
LT		 3355 int status = 0;
3356
8867fe58
MS		 3357 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3358 if (IS_ERR(ctx))
3359 return PTR_ERR(ctx);
3360
aa9c2669
DQ		 3361 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3362
a8a5da99 3363 sattr->ia_mode &= ~current_umask();
5bc2afc2 3364 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3365 if (IS_ERR(state)) {
3366 status = PTR_ERR(state);
c0204fd2 3367 goto out;
1da177e4 3368 }
1da177e4 3369out:
aa9c2669 3370 nfs4_label_release_security(ilabel);
8867fe58 3371 put_nfs_open_context(ctx);
1da177e4
LT		 3372 return status;
3373}
3374
3375static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3376{
16e42959 3377 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3378 struct nfs_removeargs args = {
1da177e4 3379 .fh = NFS_FH(dir),
26fe5750 3380 .name = *name,
16e42959 3381 };
4fdc17b2 3382 struct nfs_removeres res = {
16e42959 3383 .server = server,
1da177e4 3384 };
1da177e4 3385 struct rpc_message msg = {
4fdc17b2
TM		 3386 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3387 .rpc_argp = &args,
3388 .rpc_resp = &res,
1da177e4 3389 };
778d2817 3390 int status;
1da177e4 3391
7c513058 3392 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3393 if (status == 0)
16e42959 3394 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3395 return status;
3396}
3397
3398static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3399{
3400 struct nfs4_exception exception = { };
3401 int err;
3402 do {
078ea3df
TM		 3403 err = _nfs4_proc_remove(dir, name);
3404 trace_nfs4_remove(dir, name, err);
3405 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3406 &exception);
3407 } while (exception.retry);
3408 return err;
3409}
3410
e4eff1a6 3411static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3412{
e4eff1a6
TM		 3413 struct nfs_server *server = NFS_SERVER(dir);
3414 struct nfs_removeargs *args = msg->rpc_argp;
3415 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3416
e4eff1a6 3417 res->server = server;
1da177e4 3418 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3419 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3420
3421 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3422}
3423
34e137cc
BS		 3424static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3425{
d9afbd1b
TM		 3426 nfs4_setup_sequence(NFS_SERVER(data->dir),
3427 &data->args.seq_args,
3428 &data->res.seq_res,
3429 task);
1da177e4
LT		 3430}
3431
e4eff1a6 3432static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3433{
078ea3df
TM		 3434 struct nfs_unlinkdata *data = task->tk_calldata;
3435 struct nfs_removeres *res = &data->res;
e4eff1a6 3436
14516c3a
TM		 3437 if (!nfs4_sequence_done(task, &res->seq_res))
3438 return 0;
9e33bed5 3439 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3440 return 0;
3441 update_changeattr(dir, &res->cinfo);
e4eff1a6 3442 return 1;
1da177e4
LT		 3443}
3444
d3d4152a
JL		 3445static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3446{
3447 struct nfs_server *server = NFS_SERVER(dir);
3448 struct nfs_renameargs *arg = msg->rpc_argp;
3449 struct nfs_renameres *res = msg->rpc_resp;
3450
3451 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3452 res->server = server;
a9c92d6b 3453 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3454}
3455
c6bfa1a1
BS		 3456static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3457{
d9afbd1b
TM		 3458 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3459 &data->args.seq_args,
3460 &data->res.seq_res,
3461 task);
d3d4152a
JL		 3462}
3463
3464static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3465 struct inode *new_dir)
3466{
fbc6f7c2
TM		 3467 struct nfs_renamedata *data = task->tk_calldata;
3468 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3469
3470 if (!nfs4_sequence_done(task, &res->seq_res))
3471 return 0;
3472 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3473 return 0;
3474
3475 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3476 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3477 return 1;
3478}
3479
1da177e4
LT		 3480static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3481 struct inode *new_dir, struct qstr *new_name)
3482{
6caf2c82 3483 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3484 struct nfs_renameargs arg = {
1da177e4
LT		 3485 .old_dir = NFS_FH(old_dir),
3486 .new_dir = NFS_FH(new_dir),
3487 .old_name = old_name,
3488 .new_name = new_name,
6caf2c82 3489 };
e8582a8b 3490 struct nfs_renameres res = {
6caf2c82 3491 .server = server,
1da177e4 3492 };
1da177e4
LT		 3493 struct rpc_message msg = {
3494 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3495 .rpc_argp = &arg,
3496 .rpc_resp = &res,
3497 };
011fff72 3498 int status = -ENOMEM;
14c43f76 3499
7c513058 3500 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3501 if (!status) {
3502 update_changeattr(old_dir, &res.old_cinfo);
3503 update_changeattr(new_dir, &res.new_cinfo);
3504 }
3505 return status;
3506}
3507
3508static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3509 struct inode *new_dir, struct qstr *new_name)
3510{
3511 struct nfs4_exception exception = { };
3512 int err;
3513 do {
fbc6f7c2
TM		 3514 err = _nfs4_proc_rename(old_dir, old_name,
3515 new_dir, new_name);
3516 trace_nfs4_rename(old_dir, old_name, new_dir, new_name, err);
3517 err = nfs4_handle_exception(NFS_SERVER(old_dir), err,
1da177e4
LT		 3518 &exception);
3519 } while (exception.retry);
3520 return err;
3521}
3522
3523static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3524{
91ba2eee 3525 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3526 struct nfs4_link_arg arg = {
3527 .fh = NFS_FH(inode),
3528 .dir_fh = NFS_FH(dir),
3529 .name = name,
91ba2eee
TM		 3530 .bitmask = server->attr_bitmask,
3531 };
91ba2eee
TM		 3532 struct nfs4_link_res res = {
3533 .server = server,
1775fd3e 3534 .label = NULL,
1da177e4 3535 };
1da177e4
LT		 3536 struct rpc_message msg = {
3537 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3538 .rpc_argp = &arg,
91ba2eee 3539 .rpc_resp = &res,
1da177e4 3540 };
136f2627
TM		 3541 int status = -ENOMEM;
3542
3543 res.fattr = nfs_alloc_fattr();
778d2817 3544 if (res.fattr == NULL)
136f2627 3545 goto out;
1da177e4 3546
14c43f76
DQ		 3547 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3548 if (IS_ERR(res.label)) {
3549 status = PTR_ERR(res.label);
3550 goto out;
3551 }
aa9c2669 3552 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3553
7c513058 3554 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3555 if (!status) {
3556 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3557 status = nfs_post_op_update_inode(inode, res.fattr);
3558 if (!status)
3559 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3560 }
14c43f76
DQ		 3561
3562
3563 nfs4_label_free(res.label);
3564
136f2627 3565out:
136f2627 3566 nfs_free_fattr(res.fattr);
1da177e4
LT		 3567 return status;
3568}
3569
3570static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3571{
3572 struct nfs4_exception exception = { };
3573 int err;
3574 do {
3575 err = nfs4_handle_exception(NFS_SERVER(inode),
3576 _nfs4_proc_link(inode, dir, name),
3577 &exception);
3578 } while (exception.retry);
3579 return err;
3580}
3581
57dc9a57
TM		 3582struct nfs4_createdata {
3583 struct rpc_message msg;
3584 struct nfs4_create_arg arg;
3585 struct nfs4_create_res res;
3586 struct nfs_fh fh;
3587 struct nfs_fattr fattr;
1775fd3e 3588 struct nfs4_label *label;
57dc9a57
TM		 3589};
3590
3591static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3592 struct qstr *name, struct iattr *sattr, u32 ftype)
3593{
3594 struct nfs4_createdata *data;
3595
3596 data = kzalloc(sizeof(*data), GFP_KERNEL);
3597 if (data != NULL) {
3598 struct nfs_server *server = NFS_SERVER(dir);
3599
14c43f76
DQ		 3600 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3601 if (IS_ERR(data->label))
3602 goto out_free;
3603
57dc9a57
TM		 3604 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3605 data->msg.rpc_argp = &data->arg;
3606 data->msg.rpc_resp = &data->res;
3607 data->arg.dir_fh = NFS_FH(dir);
3608 data->arg.server = server;
3609 data->arg.name = name;
3610 data->arg.attrs = sattr;
3611 data->arg.ftype = ftype;
aa9c2669 3612 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3613 data->res.server = server;
3614 data->res.fh = &data->fh;
3615 data->res.fattr = &data->fattr;
1775fd3e 3616 data->res.label = data->label;
57dc9a57 3617 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3618 }
3619 return data;
14c43f76
DQ		 3620out_free:
3621 kfree(data);
3622 return NULL;
57dc9a57
TM		 3623}
3624
3625static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3626{
7c513058 3627 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3628 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3629 if (status == 0) {
3630 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3631 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3632 }
3633 return status;
3634}
3635
3636static void nfs4_free_createdata(struct nfs4_createdata *data)
3637{
14c43f76 3638 nfs4_label_free(data->label);
57dc9a57
TM		 3639 kfree(data);
3640}
3641
4f390c15 3642static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3643 struct page *page, unsigned int len, struct iattr *sattr,
3644 struct nfs4_label *label)
1da177e4 3645{
57dc9a57
TM		 3646 struct nfs4_createdata *data;
3647 int status = -ENAMETOOLONG;
1da177e4 3648
94a6d753 3649 if (len > NFS4_MAXPATHLEN)
57dc9a57 3650 goto out;
4f390c15 3651
57dc9a57
TM		 3652 status = -ENOMEM;
3653 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3654 if (data == NULL)
3655 goto out;
3656
3657 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3658 data->arg.u.symlink.pages = &page;
3659 data->arg.u.symlink.len = len;
1775fd3e 3660 data->arg.label = label;
1da177e4 3661
57dc9a57
TM		 3662 status = nfs4_do_create(dir, dentry, data);
3663
3664 nfs4_free_createdata(data);
3665out:
1da177e4
LT		 3666 return status;
3667}
3668
4f390c15 3669static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3670 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3671{
3672 struct nfs4_exception exception = { };
aa9c2669 3673 struct nfs4_label l, *label = NULL;
1da177e4 3674 int err;
aa9c2669
DQ		 3675
3676 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3677
1da177e4 3678 do {
078ea3df
TM		 3679 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3680 trace_nfs4_symlink(dir, &dentry->d_name, err);
3681 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3682 &exception);
3683 } while (exception.retry);
aa9c2669
DQ		 3684
3685 nfs4_label_release_security(label);
1da177e4
LT		 3686 return err;
3687}
3688
3689static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3690 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3691{
57dc9a57
TM		 3692 struct nfs4_createdata *data;
3693 int status = -ENOMEM;
1da177e4 3694
57dc9a57
TM		 3695 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3696 if (data == NULL)
3697 goto out;
3698
1775fd3e 3699 data->arg.label = label;
57dc9a57
TM		 3700 status = nfs4_do_create(dir, dentry, data);
3701
3702 nfs4_free_createdata(data);
3703out:
1da177e4
LT		 3704 return status;
3705}
3706
3707static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3708 struct iattr *sattr)
3709{
3710 struct nfs4_exception exception = { };
aa9c2669 3711 struct nfs4_label l, *label = NULL;
1da177e4 3712 int err;
a8a5da99 3713
aa9c2669
DQ		 3714 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3715
a8a5da99 3716 sattr->ia_mode &= ~current_umask();
1da177e4 3717 do {
078ea3df
TM		 3718 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3719 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3720 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3721 &exception);
3722 } while (exception.retry);
aa9c2669
DQ		 3723 nfs4_label_release_security(label);
3724
1da177e4
LT		 3725 return err;
3726}
3727
3728static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3729 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3730{
3731 struct inode *dir = dentry->d_inode;
3732 struct nfs4_readdir_arg args = {
3733 .fh = NFS_FH(dir),
56e4ebf8 3734 .pages = pages,
1da177e4
LT		 3735 .pgbase = 0,
3736 .count = count,
96d25e53 3737 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3738 .plus = plus,
1da177e4
LT		 3739 };
3740 struct nfs4_readdir_res res;
3741 struct rpc_message msg = {
3742 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3743 .rpc_argp = &args,
3744 .rpc_resp = &res,
3745 .rpc_cred = cred,
3746 };
3747 int status;
3748
3110ff80 3749 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3750 dentry->d_parent->d_name.name,
3751 dentry->d_name.name,
3752 (unsigned long long)cookie);
c3f52af3 3753 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3754 res.pgbase = args.pgbase;
7c513058 3755 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3756 if (status >= 0) {
c3f52af3 3757 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3758 status += args.pgbase;
3759 }
c4812998
TM		 3760
3761 nfs_invalidate_atime(dir);
3762
3110ff80 3763 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3764 return status;
3765}
3766
3767static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3768 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3769{
3770 struct nfs4_exception exception = { };
3771 int err;
3772 do {
c1578b76
TM		 3773 err = _nfs4_proc_readdir(dentry, cred, cookie,
3774 pages, count, plus);
3775 trace_nfs4_readdir(dentry->d_inode, err);
3776 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3777 &exception);
3778 } while (exception.retry);
3779 return err;
3780}
3781
3782static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3783 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3784{
57dc9a57
TM		 3785 struct nfs4_createdata *data;
3786 int mode = sattr->ia_mode;
3787 int status = -ENOMEM;
1da177e4 3788
57dc9a57
TM		 3789 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3790 if (data == NULL)
3791 goto out;
3792
1da177e4 3793 if (S_ISFIFO(mode))
57dc9a57 3794 data->arg.ftype = NF4FIFO;
1da177e4 3795 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3796 data->arg.ftype = NF4BLK;
3797 data->arg.u.device.specdata1 = MAJOR(rdev);
3798 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3799 }
3800 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3801 data->arg.ftype = NF4CHR;
3802 data->arg.u.device.specdata1 = MAJOR(rdev);
3803 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3804 } else if (!S_ISSOCK(mode)) {
3805 status = -EINVAL;
3806 goto out_free;
1da177e4 3807 }
1775fd3e 3808
aa9c2669 3809 data->arg.label = label;
57dc9a57 3810 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3811out_free:
57dc9a57
TM		 3812 nfs4_free_createdata(data);
3813out:
1da177e4
LT		 3814 return status;
3815}
3816
3817static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3818 struct iattr *sattr, dev_t rdev)
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_mknod(dir, dentry, sattr, label, rdev);
3829 trace_nfs4_mknod(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
3834 nfs4_label_release_security(label);
3835
1da177e4
LT		 3836 return err;
3837}
3838
3839static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3840 struct nfs_fsstat *fsstat)
3841{
3842 struct nfs4_statfs_arg args = {
3843 .fh = fhandle,
3844 .bitmask = server->attr_bitmask,
3845 };
24ad148a
BH		 3846 struct nfs4_statfs_res res = {
3847 .fsstat = fsstat,
3848 };
1da177e4
LT		 3849 struct rpc_message msg = {
3850 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3851 .rpc_argp = &args,
24ad148a 3852 .rpc_resp = &res,
1da177e4
LT		 3853 };
3854
0e574af1 3855 nfs_fattr_init(fsstat->fattr);
7c513058 3856 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3857}
3858
3859static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3860{
3861 struct nfs4_exception exception = { };
3862 int err;
3863 do {
3864 err = nfs4_handle_exception(server,
3865 _nfs4_proc_statfs(server, fhandle, fsstat),
3866 &exception);
3867 } while (exception.retry);
3868 return err;
3869}
3870
3871static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3872 struct nfs_fsinfo *fsinfo)
3873{
3874 struct nfs4_fsinfo_arg args = {
3875 .fh = fhandle,
3876 .bitmask = server->attr_bitmask,
3877 };
3dda5e43
BH		 3878 struct nfs4_fsinfo_res res = {
3879 .fsinfo = fsinfo,
3880 };
1da177e4
LT		 3881 struct rpc_message msg = {
3882 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3883 .rpc_argp = &args,
3dda5e43 3884 .rpc_resp = &res,
1da177e4
LT		 3885 };
3886
7c513058 3887 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3888}
3889
3890static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3891{
3892 struct nfs4_exception exception = { };
83ca7f5a 3893 unsigned long now = jiffies;
1da177e4
LT		 3894 int err;
3895
3896 do {
83ca7f5a 3897 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 3898 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 3899 if (err == 0) {
3900 struct nfs_client *clp = server->nfs_client;
3901
3902 spin_lock(&clp->cl_lock);
3903 clp->cl_lease_time = fsinfo->lease_time * HZ;
3904 clp->cl_last_renewal = now;
3905 spin_unlock(&clp->cl_lock);
3906 break;
3907 }
3908 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3909 } while (exception.retry);
3910 return err;
3911}
3912
3913static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3914{
e38eb650
BS		 3915 int error;
3916
0e574af1 3917 nfs_fattr_init(fsinfo->fattr);
e38eb650 3918 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3919 if (error == 0) {
3920 /* block layout checks this! */
3921 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3922 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3923 }
e38eb650
BS		 3924
3925 return error;
1da177e4
LT		 3926}
3927
3928static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3929 struct nfs_pathconf *pathconf)
3930{
3931 struct nfs4_pathconf_arg args = {
3932 .fh = fhandle,
3933 .bitmask = server->attr_bitmask,
3934 };
d45b2989
BH		 3935 struct nfs4_pathconf_res res = {
3936 .pathconf = pathconf,
3937 };
1da177e4
LT		 3938 struct rpc_message msg = {
3939 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3940 .rpc_argp = &args,
d45b2989 3941 .rpc_resp = &res,
1da177e4
LT		 3942 };
3943
3944 /* None of the pathconf attributes are mandatory to implement */
3945 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3946 memset(pathconf, 0, sizeof(*pathconf));
3947 return 0;
3948 }
3949
0e574af1 3950 nfs_fattr_init(pathconf->fattr);
7c513058 3951 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3952}
3953
3954static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3955 struct nfs_pathconf *pathconf)
3956{
3957 struct nfs4_exception exception = { };
3958 int err;
3959
3960 do {
3961 err = nfs4_handle_exception(server,
3962 _nfs4_proc_pathconf(server, fhandle, pathconf),
3963 &exception);
3964 } while (exception.retry);
3965 return err;
3966}
3967
5521abfd 3968int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3969 const struct nfs_open_context *ctx,
3970 const struct nfs_lock_context *l_ctx,
3971 fmode_t fmode)
3972{
3973 const struct nfs_lockowner *lockowner = NULL;
3974
3975 if (l_ctx != NULL)
3976 lockowner = &l_ctx->lockowner;
5521abfd 3977 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3978}
3979EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3980
5521abfd
TM		 3981static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3982 const struct nfs_open_context *ctx,
3983 const struct nfs_lock_context *l_ctx,
3984 fmode_t fmode)
3985{
3986 nfs4_stateid current_stateid;
3987
3988 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3989 return false;
3990 return nfs4_stateid_match(stateid, &current_stateid);
3991}
3992
3993static bool nfs4_error_stateid_expired(int err)
3994{
3995 switch (err) {
3996 case -NFS4ERR_DELEG_REVOKED:
3997 case -NFS4ERR_ADMIN_REVOKED:
3998 case -NFS4ERR_BAD_STATEID:
3999 case -NFS4ERR_STALE_STATEID:
4000 case -NFS4ERR_OLD_STATEID:
4001 case -NFS4ERR_OPENMODE:
4002 case -NFS4ERR_EXPIRED:
4003 return true;
4004 }
4005 return false;
4006}
4007
d20581aa
BH		 4008void __nfs4_read_done_cb(struct nfs_read_data *data)
4009{
cd841605 4010 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 4011}
4012
cbdabc7f 4013static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 4014{
cd841605 4015 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 4016
cc668ab3 4017 trace_nfs4_read(data, task->tk_status);
9e33bed5 4018 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 4019 rpc_restart_call_prepare(task);
ec06c096 4020 return -EAGAIN;
1da177e4 4021 }
8850df99 4022
d20581aa 4023 __nfs4_read_done_cb(data);
1da177e4 4024 if (task->tk_status > 0)
ec06c096
TM		 4025 renew_lease(server, data->timestamp);
4026 return 0;
1da177e4
LT		 4027}
4028
5521abfd
TM		 4029static bool nfs4_read_stateid_changed(struct rpc_task *task,
4030 struct nfs_readargs *args)
4031{
4032
4033 if (!nfs4_error_stateid_expired(task->tk_status) ||
4034 nfs4_stateid_is_current(&args->stateid,
4035 args->context,
4036 args->lock_context,
4037 FMODE_READ))
4038 return false;
4039 rpc_restart_call_prepare(task);
4040 return true;
4041}
4042
cbdabc7f
AA		 4043static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
4044{
4045
4046 dprintk("--> %s\n", __func__);
4047
4048 if (!nfs4_sequence_done(task, &data->res.seq_res))
4049 return -EAGAIN;
5521abfd
TM		 4050 if (nfs4_read_stateid_changed(task, &data->args))
4051 return -EAGAIN;
d20581aa
BH		 4052 return data->read_done_cb ? data->read_done_cb(task, data) :
4053 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 4054}
4055
bdc7f021 4056static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 4057{
1da177e4 4058 data->timestamp = jiffies;
cbdabc7f 4059 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 4060 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
a9c92d6b 4061 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 4062}
4063
ef1820f9 4064static int nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
ea7c3303 4065{
9b206149 4066 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4067 &data->args.seq_args,
4068 &data->res.seq_res,
9b206149 4069 task))
ef1820f9
N		 4070 return 0;
4071 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4072 data->args.lock_context, FMODE_READ) == -EIO)
4073 return -EIO;
4074 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4075 return -EIO;
4076 return 0;
1da177e4
LT		 4077}
4078
b029bc9b 4079static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 4080{
cd841605 4081 struct inode *inode = data->header->inode;
1da177e4 4082
cc668ab3 4083 trace_nfs4_write(data, task->tk_status);
9e33bed5 4084 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 4085 rpc_restart_call_prepare(task);
788e7a89 4086 return -EAGAIN;
1da177e4 4087 }
4f9838c7 4088 if (task->tk_status >= 0) {
1da177e4 4089 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 4090 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 4091 }
788e7a89 4092 return 0;
1da177e4
LT		 4093}
4094
5521abfd
TM		 4095static bool nfs4_write_stateid_changed(struct rpc_task *task,
4096 struct nfs_writeargs *args)
4097{
4098
4099 if (!nfs4_error_stateid_expired(task->tk_status) ||
4100 nfs4_stateid_is_current(&args->stateid,
4101 args->context,
4102 args->lock_context,
4103 FMODE_WRITE))
4104 return false;
4105 rpc_restart_call_prepare(task);
4106 return true;
4107}
4108
b029bc9b
FI		 4109static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
4110{
4111 if (!nfs4_sequence_done(task, &data->res.seq_res))
4112 return -EAGAIN;
5521abfd
TM		 4113 if (nfs4_write_stateid_changed(task, &data->args))
4114 return -EAGAIN;
d20581aa
BH		 4115 return data->write_done_cb ? data->write_done_cb(task, data) :
4116 nfs4_write_done_cb(task, data);
b029bc9b
FI		 4117}
4118
5a37f851
TM		 4119static
4120bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 4121{
5a37f851
TM		 4122 const struct nfs_pgio_header *hdr = data->header;
4123
4124 /* Don't request attributes for pNFS or O_DIRECT writes */
4125 if (data->ds_clp != NULL || hdr->dreq != NULL)
4126 return false;
4127 /* Otherwise, request attributes if and only if we don't hold
4128 * a delegation
4129 */
011e2a7f 4130 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4131}
a69aef14 4132
bdc7f021 4133static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 4134{
cd841605 4135 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 4136
5a37f851 4137 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 4138 data->args.bitmask = NULL;
4139 data->res.fattr = NULL;
4140 } else
4141 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4142
b029bc9b
FI		 4143 if (!data->write_done_cb)
4144 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 4145 data->res.server = server;
1da177e4
LT		 4146 data->timestamp = jiffies;
4147
bdc7f021 4148 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
a9c92d6b 4149 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4150}
4151
ef1820f9 4152static int nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
c6cb80d0 4153{
9b206149 4154 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4155 &data->args.seq_args,
4156 &data->res.seq_res,
9b206149 4157 task))
ef1820f9
N		 4158 return 0;
4159 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4160 data->args.lock_context, FMODE_WRITE) == -EIO)
4161 return -EIO;
4162 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4163 return -EIO;
4164 return 0;
1da177e4
LT		 4165}
4166
0b7c0153 4167static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4168{
d9afbd1b
TM		 4169 nfs4_setup_sequence(NFS_SERVER(data->inode),
4170 &data->args.seq_args,
4171 &data->res.seq_res,
4172 task);
1da177e4
LT		 4173}
4174
0b7c0153 4175static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4176{
1da177e4 4177 struct inode *inode = data->inode;
14516c3a 4178
cc668ab3 4179 trace_nfs4_commit(data, task->tk_status);
9e33bed5 4180 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 4181 rpc_restart_call_prepare(task);
788e7a89 4182 return -EAGAIN;
1da177e4 4183 }
788e7a89 4184 return 0;
1da177e4
LT		 4185}
4186
0b7c0153 4187static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4188{
4189 if (!nfs4_sequence_done(task, &data->res.seq_res))
4190 return -EAGAIN;
0b7c0153 4191 return data->commit_done_cb(task, data);
5f452431
FI		 4192}
4193
0b7c0153 4194static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4195{
788e7a89 4196 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4197
0b7c0153
FI		 4198 if (data->commit_done_cb == NULL)
4199 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4200 data->res.server = server;
bdc7f021 4201 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4202 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4203}
4204
9bc4e3ca
CL		 4205struct nfs4_renewdata {
4206 struct nfs_client *client;
4207 unsigned long timestamp;
4208};
4209
1da177e4
LT		 4210/*
4211 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4212 * standalone procedure for queueing an asynchronous RENEW.
4213 */
9bc4e3ca 4214static void nfs4_renew_release(void *calldata)
dc96aef9 4215{
9bc4e3ca
CL		 4216 struct nfs4_renewdata *data = calldata;
4217 struct nfs_client *clp = data->client;
dc96aef9 4218
0851de06
AB		 4219 if (atomic_read(&clp->cl_count) > 1)
4220 nfs4_schedule_state_renewal(clp);
4221 nfs_put_client(clp);
9bc4e3ca 4222 kfree(data);
dc96aef9
AB		 4223}
4224
9bc4e3ca 4225static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4226{
9bc4e3ca
CL		 4227 struct nfs4_renewdata *data = calldata;
4228 struct nfs_client *clp = data->client;
4229 unsigned long timestamp = data->timestamp;
1da177e4 4230
c6d01c6f 4231 trace_nfs4_renew_async(clp, task->tk_status);
1da177e4 4232 if (task->tk_status < 0) {
95baa25c 4233 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4234 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4235 return;
4236 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4237 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4238 return;
4239 }
4240 nfs4_schedule_path_down_recovery(clp);
1da177e4 4241 }
452e9352 4242 do_renew_lease(clp, timestamp);
1da177e4
LT		 4243}
4244
963d8fe5
TM		 4245static const struct rpc_call_ops nfs4_renew_ops = {
4246 .rpc_call_done = nfs4_renew_done,
dc96aef9 4247 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4248};
4249
2f60ea6b 4250static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4251{
4252 struct rpc_message msg = {
4253 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4254 .rpc_argp = clp,
b4454fe1 4255 .rpc_cred = cred,
1da177e4 4256 };
9bc4e3ca 4257 struct nfs4_renewdata *data;
1da177e4 4258
2f60ea6b
TM		 4259 if (renew_flags == 0)
4260 return 0;
0851de06
AB		 4261 if (!atomic_inc_not_zero(&clp->cl_count))
4262 return -EIO;
b569ad34 4263 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4264 if (data == NULL)
4265 return -ENOMEM;
4266 data->client = clp;
4267 data->timestamp = jiffies;
bc7a05ca 4268 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4269 &nfs4_renew_ops, data);
1da177e4
LT		 4270}
4271
8534d4ec 4272static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4273{
4274 struct rpc_message msg = {
4275 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4276 .rpc_argp = clp,
b4454fe1 4277 .rpc_cred = cred,
1da177e4
LT		 4278 };
4279 unsigned long now = jiffies;
4280 int status;
4281
bc7a05ca 4282 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4283 if (status < 0)
4284 return status;
452e9352 4285 do_renew_lease(clp, now);
1da177e4
LT		 4286 return 0;
4287}
4288
aa1870af
BF		 4289static inline int nfs4_server_supports_acls(struct nfs_server *server)
4290{
4291 return (server->caps & NFS_CAP_ACLS)
4292 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
4293 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
4294}
4295
21f498c2
TM		 4296/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4297 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4298 * the stack.
4299 */
21f498c2 4300#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4301
e9e3d724
NH		 4302static int buf_to_pages_noslab(const void *buf, size_t buflen,
4303 struct page **pages, unsigned int *pgbase)
4304{
4305 struct page *newpage, **spages;
4306 int rc = 0;
4307 size_t len;
4308 spages = pages;
4309
4310 do {
21f498c2 4311 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4312 newpage = alloc_page(GFP_KERNEL);
4313
4314 if (newpage == NULL)
4315 goto unwind;
4316 memcpy(page_address(newpage), buf, len);
4317 buf += len;
4318 buflen -= len;
4319 *pages++ = newpage;
4320 rc++;
4321 } while (buflen != 0);
4322
4323 return rc;
4324
4325unwind:
4326 for(; rc > 0; rc--)
4327 __free_page(spages[rc-1]);
4328 return -ENOMEM;
4329}
4330
e50a1c2e
BF		 4331struct nfs4_cached_acl {
4332 int cached;
4333 size_t len;
3e9d4154 4334 char data[0];
e50a1c2e
BF		 4335};
4336
4337static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4338{
4339 struct nfs_inode *nfsi = NFS_I(inode);
4340
4341 spin_lock(&inode->i_lock);
4342 kfree(nfsi->nfs4_acl);
4343 nfsi->nfs4_acl = acl;
4344 spin_unlock(&inode->i_lock);
4345}
4346
4347static void nfs4_zap_acl_attr(struct inode *inode)
4348{
4349 nfs4_set_cached_acl(inode, NULL);
4350}
4351
4352static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4353{
4354 struct nfs_inode *nfsi = NFS_I(inode);
4355 struct nfs4_cached_acl *acl;
4356 int ret = -ENOENT;
4357
4358 spin_lock(&inode->i_lock);
4359 acl = nfsi->nfs4_acl;
4360 if (acl == NULL)
4361 goto out;
4362 if (buf == NULL) /* user is just asking for length */
4363 goto out_len;
4364 if (acl->cached == 0)
4365 goto out;
4366 ret = -ERANGE; /* see getxattr(2) man page */
4367 if (acl->len > buflen)
4368 goto out;
4369 memcpy(buf, acl->data, acl->len);
4370out_len:
4371 ret = acl->len;
4372out:
4373 spin_unlock(&inode->i_lock);
4374 return ret;
4375}
4376
5794d21e 4377static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4378{
4379 struct nfs4_cached_acl *acl;
b291f1b1 4380 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4381
1f1ea6c2 4382 if (buflen <= PAGE_SIZE) {
b291f1b1 4383 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4384 if (acl == NULL)
4385 goto out;
4386 acl->cached = 1;
5794d21e 4387 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4388 } else {
4389 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4390 if (acl == NULL)
4391 goto out;
4392 acl->cached = 0;
4393 }
4394 acl->len = acl_len;
4395out:
4396 nfs4_set_cached_acl(inode, acl);
4397}
4398
bf118a34
AA		 4399/*
4400 * The getxattr API returns the required buffer length when called with a
4401 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4402 * the required buf. On a NULL buf, we send a page of data to the server
4403 * guessing that the ACL request can be serviced by a page. If so, we cache
4404 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4405 * the cache. If not so, we throw away the page, and cache the required
4406 * length. The next getxattr call will then produce another round trip to
4407 * the server, this time with the input buf of the required size.
4408 */
16b4289c 4409static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4410{
bf118a34 4411 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4412 struct nfs_getaclargs args = {
4413 .fh = NFS_FH(inode),
4414 .acl_pages = pages,
4415 .acl_len = buflen,
4416 };
663c79b3
BH		 4417 struct nfs_getaclres res = {
4418 .acl_len = buflen,
4419 };
aa1870af
BF		 4420 struct rpc_message msg = {
4421 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4422 .rpc_argp = &args,
663c79b3 4423 .rpc_resp = &res,
aa1870af 4424 };
21f498c2
TM		 4425 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4426 int ret = -ENOMEM, i;
aa1870af 4427
bf118a34
AA		 4428 /* As long as we're doing a round trip to the server anyway,
4429 * let's be prepared for a page of acl data. */
4430 if (npages == 0)
4431 npages = 1;
21f498c2
TM		 4432 if (npages > ARRAY_SIZE(pages))
4433 return -ERANGE;
5a006899 4434
bf118a34
AA		 4435 for (i = 0; i < npages; i++) {
4436 pages[i] = alloc_page(GFP_KERNEL);
4437 if (!pages[i])
4438 goto out_free;
e50a1c2e 4439 }
5a006899
SP		 4440
4441 /* for decoding across pages */
4442 res.acl_scratch = alloc_page(GFP_KERNEL);
4443 if (!res.acl_scratch)
4444 goto out_free;
4445
bf118a34
AA		 4446 args.acl_len = npages * PAGE_SIZE;
4447 args.acl_pgbase = 0;
5a006899 4448
de040bec 4449 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4450 __func__, buf, buflen, npages, args.acl_len);
4451 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4452 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4453 if (ret)
4454 goto out_free;
bf118a34 4455
1f1ea6c2
TM		 4456 /* Handle the case where the passed-in buffer is too short */
4457 if (res.acl_flags & NFS4_ACL_TRUNC) {
4458 /* Did the user only issue a request for the acl length? */
4459 if (buf == NULL)
4460 goto out_ok;
e50a1c2e 4461 ret = -ERANGE;
1f1ea6c2 4462 goto out_free;
e50a1c2e 4463 }
1f1ea6c2 4464 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4465 if (buf) {
4466 if (res.acl_len > buflen) {
4467 ret = -ERANGE;
4468 goto out_free;
4469 }
1f1ea6c2 4470 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4471 }
1f1ea6c2
TM		 4472out_ok:
4473 ret = res.acl_len;
e50a1c2e 4474out_free:
bf118a34
AA		 4475 for (i = 0; i < npages; i++)
4476 if (pages[i])
4477 __free_page(pages[i]);
331818f1
TM		 4478 if (res.acl_scratch)
4479 __free_page(res.acl_scratch);
aa1870af
BF		 4480 return ret;
4481}
4482
16b4289c
TM		 4483static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4484{
4485 struct nfs4_exception exception = { };
4486 ssize_t ret;
4487 do {
4488 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4489 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4490 if (ret >= 0)
4491 break;
4492 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4493 } while (exception.retry);
4494 return ret;
4495}
4496
e50a1c2e
BF		 4497static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4498{
4499 struct nfs_server *server = NFS_SERVER(inode);
4500 int ret;
4501
4502 if (!nfs4_server_supports_acls(server))
4503 return -EOPNOTSUPP;
4504 ret = nfs_revalidate_inode(server, inode);
4505 if (ret < 0)
4506 return ret;
08a22b39
AK		 4507 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4508 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4509 ret = nfs4_read_cached_acl(inode, buf, buflen);
4510 if (ret != -ENOENT)
bf118a34
AA		 4511 /* -ENOENT is returned if there is no ACL or if there is an ACL
4512 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4513 return ret;
4514 return nfs4_get_acl_uncached(inode, buf, buflen);
4515}
4516
16b4289c 4517static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4518{
4519 struct nfs_server *server = NFS_SERVER(inode);
4520 struct page *pages[NFS4ACL_MAXPAGES];
4521 struct nfs_setaclargs arg = {
4522 .fh = NFS_FH(inode),
4523 .acl_pages = pages,
4524 .acl_len = buflen,
4525 };
73c403a9 4526 struct nfs_setaclres res;
4b580ee3
BF		 4527 struct rpc_message msg = {
4528 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4529 .rpc_argp = &arg,
73c403a9 4530 .rpc_resp = &res,
4b580ee3 4531 };
21f498c2 4532 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4533 int ret, i;
4b580ee3
BF		 4534
4535 if (!nfs4_server_supports_acls(server))
4536 return -EOPNOTSUPP;
21f498c2
TM		 4537 if (npages > ARRAY_SIZE(pages))
4538 return -ERANGE;
e9e3d724
NH		 4539 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4540 if (i < 0)
4541 return i;
57ec14c5 4542 nfs4_inode_return_delegation(inode);
7c513058 4543 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4544
4545 /*
4546 * Free each page after tx, so the only ref left is
4547 * held by the network stack
4548 */
4549 for (; i > 0; i--)
4550 put_page(pages[i-1]);
4551
08a22b39
AK		 4552 /*
4553 * Acl update can result in inode attribute update.
4554 * so mark the attribute cache invalid.
4555 */
4556 spin_lock(&inode->i_lock);
4557 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4558 spin_unlock(&inode->i_lock);
f41f7418
TM		 4559 nfs_access_zap_cache(inode);
4560 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4561 return ret;
4562}
4563
16b4289c
TM		 4564static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4565{
4566 struct nfs4_exception exception = { };
4567 int err;
4568 do {
c1578b76
TM		 4569 err = __nfs4_proc_set_acl(inode, buf, buflen);
4570 trace_nfs4_set_acl(inode, err);
4571 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4572 &exception);
4573 } while (exception.retry);
4574 return err;
4575}
4576
aa9c2669
DQ		 4577#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4578static int _nfs4_get_security_label(struct inode *inode, void *buf,
4579 size_t buflen)
4580{
4581 struct nfs_server *server = NFS_SERVER(inode);
4582 struct nfs_fattr fattr;
4583 struct nfs4_label label = {0, 0, buflen, buf};
4584
4585 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4586 struct nfs4_getattr_arg args = {
4587 .fh = NFS_FH(inode),
4588 .bitmask = bitmask,
4589 };
4590 struct nfs4_getattr_res res = {
4591 .fattr = &fattr,
4592 .label = &label,
4593 .server = server,
4594 };
4595 struct rpc_message msg = {
4596 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4597 .rpc_argp = &args,
4598 .rpc_resp = &res,
4599 };
4600 int ret;
4601
4602 nfs_fattr_init(&fattr);
4603
4604 ret = rpc_call_sync(server->client, &msg, 0);
4605 if (ret)
4606 return ret;
4607 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4608 return -ENOENT;
4609 if (buflen < label.len)
4610 return -ERANGE;
4611 return 0;
4612}
4613
4614static int nfs4_get_security_label(struct inode *inode, void *buf,
4615 size_t buflen)
4616{
4617 struct nfs4_exception exception = { };
4618 int err;
4619
4620 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4621 return -EOPNOTSUPP;
4622
4623 do {
c1578b76
TM		 4624 err = _nfs4_get_security_label(inode, buf, buflen);
4625 trace_nfs4_get_security_label(inode, err);
4626 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4627 &exception);
4628 } while (exception.retry);
4629 return err;
4630}
4631
4632static int _nfs4_do_set_security_label(struct inode *inode,
4633 struct nfs4_label *ilabel,
4634 struct nfs_fattr *fattr,
4635 struct nfs4_label *olabel)
4636{
4637
4638 struct iattr sattr = {0};
4639 struct nfs_server *server = NFS_SERVER(inode);
4640 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4641 struct nfs_setattrargs args = {
4642 .fh = NFS_FH(inode),
4643 .iap = &sattr,
4644 .server = server,
4645 .bitmask = bitmask,
4646 .label = ilabel,
4647 };
4648 struct nfs_setattrres res = {
4649 .fattr = fattr,
4650 .label = olabel,
4651 .server = server,
4652 };
4653 struct rpc_message msg = {
4654 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4655 .rpc_argp = &args,
4656 .rpc_resp = &res,
4657 };
4658 int status;
4659
4660 nfs4_stateid_copy(&args.stateid, &zero_stateid);
4661
4662 status = rpc_call_sync(server->client, &msg, 0);
4663 if (status)
4664 dprintk("%s failed: %d\n", __func__, status);
4665
4666 return status;
4667}
4668
4669static int nfs4_do_set_security_label(struct inode *inode,
4670 struct nfs4_label *ilabel,
4671 struct nfs_fattr *fattr,
4672 struct nfs4_label *olabel)
4673{
4674 struct nfs4_exception exception = { };
4675 int err;
4676
4677 do {
c1578b76
TM		 4678 err = _nfs4_do_set_security_label(inode, ilabel,
4679 fattr, olabel);
4680 trace_nfs4_set_security_label(inode, err);
4681 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4682 &exception);
4683 } while (exception.retry);
4684 return err;
4685}
4686
4687static int
4688nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4689{
4690 struct nfs4_label ilabel, *olabel = NULL;
4691 struct nfs_fattr fattr;
4692 struct rpc_cred *cred;
4693 struct inode *inode = dentry->d_inode;
4694 int status;
4695
4696 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4697 return -EOPNOTSUPP;
4698
4699 nfs_fattr_init(&fattr);
4700
4701 ilabel.pi = 0;
4702 ilabel.lfs = 0;
4703 ilabel.label = (char *)buf;
4704 ilabel.len = buflen;
4705
4706 cred = rpc_lookup_cred();
4707 if (IS_ERR(cred))
4708 return PTR_ERR(cred);
4709
4710 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4711 if (IS_ERR(olabel)) {
4712 status = -PTR_ERR(olabel);
4713 goto out;
4714 }
4715
4716 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4717 if (status == 0)
4718 nfs_setsecurity(inode, &fattr, olabel);
4719
4720 nfs4_label_free(olabel);
4721out:
4722 put_rpccred(cred);
4723 return status;
4724}
4725#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4726
4727
1da177e4 4728static int
aa5190d0 4729nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4730{
aa5190d0
TM		 4731 struct nfs_client *clp = server->nfs_client;
4732
4733 if (task->tk_status >= 0)
1da177e4
LT		 4734 return 0;
4735 switch(task->tk_status) {
a1d0b5ee 4736 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4737 case -NFS4ERR_ADMIN_REVOKED:
4738 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4739 if (state == NULL)
4740 break;
4741 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4742 case -NFS4ERR_OPENMODE:
4743 if (state == NULL)
4744 break;
5d422301 4745 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4746 goto recovery_failed;
0400a6b0 4747 goto wait_on_recovery;
0ced63d1 4748 case -NFS4ERR_EXPIRED:
5d422301
TM		 4749 if (state != NULL) {
4750 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4751 goto recovery_failed;
5d422301 4752 }
1da177e4 4753 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4754 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4755 nfs4_schedule_lease_recovery(clp);
4756 goto wait_on_recovery;
519ae255
CL		 4757 case -NFS4ERR_MOVED:
4758 if (nfs4_schedule_migration_recovery(server) < 0)
4759 goto recovery_failed;
4760 goto wait_on_recovery;
4745e315
AA		 4761#if defined(CONFIG_NFS_V4_1)
4762 case -NFS4ERR_BADSESSION:
4763 case -NFS4ERR_BADSLOT:
4764 case -NFS4ERR_BAD_HIGH_SLOT:
4765 case -NFS4ERR_DEADSESSION:
4766 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4767 case -NFS4ERR_SEQ_FALSE_RETRY:
4768 case -NFS4ERR_SEQ_MISORDERED:
4769 dprintk("%s ERROR %d, Reset session\n", __func__,
4770 task->tk_status);
9f594791 4771 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
f1478c13 4772 goto restart_call;
4745e315 4773#endif /* CONFIG_NFS_V4_1 */
1da177e4 4774 case -NFS4ERR_DELAY:
aa5190d0 4775 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4776 case -NFS4ERR_GRACE:
1da177e4 4777 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4778 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4779 case -NFS4ERR_OLD_STATEID:
f1478c13 4780 goto restart_call;
1da177e4
LT		 4781 }
4782 task->tk_status = nfs4_map_errors(task->tk_status);
4783 return 0;
9f51a78e 4784recovery_failed:
5d422301
TM		 4785 task->tk_status = -EIO;
4786 return 0;
0400a6b0 4787wait_on_recovery:
a2c0b9e2 4788 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4789 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4790 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4791 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4792 goto recovery_failed;
f1478c13 4793restart_call:
a2c0b9e2
TM		 4794 task->tk_status = 0;
4795 return -EAGAIN;
1da177e4
LT		 4796}
4797
f092075d
CL		 4798static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4799 nfs4_verifier *bootverf)
cd93710e
CL		 4800{
4801 __be32 verf[2];
4802
2c820d9a
CL		 4803 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4804 /* An impossible timestamp guarantees this value
4805 * will never match a generated boot time. */
4806 verf[0] = 0;
17f26b12 4807 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4808 } else {
f092075d 4809 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4810 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4811 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4812 }
cd93710e
CL		 4813 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4814}
4815
e984a55a
CL		 4816static unsigned int
4817nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4818 char *buf, size_t len)
4819{
4820 unsigned int result;
4821
4822 rcu_read_lock();
4823 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4824 clp->cl_ipaddr,
4825 rpc_peeraddr2str(clp->cl_rpcclient,
4826 RPC_DISPLAY_ADDR),
4827 rpc_peeraddr2str(clp->cl_rpcclient,
4828 RPC_DISPLAY_PROTO));
4829 rcu_read_unlock();
4830 return result;
4831}
4832
4833static unsigned int
4834nfs4_init_uniform_client_string(const struct nfs_client *clp,
4835 char *buf, size_t len)
4836{
55b59293 4837 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4838
4839 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4840 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4841 clp->rpc_ops->version,
4842 clp->cl_minorversion,
4843 nfs4_client_id_uniquifier,
4844 nodename);
e984a55a
CL		 4845 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4846 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4847 nodename);
e984a55a
CL		 4848}
4849
6bbb4ae8
CL		 4850/**
4851 * nfs4_proc_setclientid - Negotiate client ID
4852 * @clp: state data structure
4853 * @program: RPC program for NFSv4 callback service
4854 * @port: IP port number for NFS4 callback service
4855 * @cred: RPC credential to use for this call
4856 * @res: where to place the result
4857 *
4858 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4859 */
bb8b27e5
TM		 4860int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4861 unsigned short port, struct rpc_cred *cred,
4862 struct nfs4_setclientid_res *res)
1da177e4
LT		 4863{
4864 nfs4_verifier sc_verifier;
4865 struct nfs4_setclientid setclientid = {
4866 .sc_verifier = &sc_verifier,
4867 .sc_prog = program,
f4eecd5d 4868 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4869 };
4870 struct rpc_message msg = {
4871 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4872 .rpc_argp = &setclientid,
bb8b27e5 4873 .rpc_resp = res,
286d7d6a 4874 .rpc_cred = cred,
1da177e4 4875 };
6bbb4ae8 4876 int status;
1da177e4 4877
de734831 4878 /* nfs_client_id4 */
f092075d 4879 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4880 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4881 setclientid.sc_name_len =
4882 nfs4_init_uniform_client_string(clp,
4883 setclientid.sc_name,
4884 sizeof(setclientid.sc_name));
4885 else
4886 setclientid.sc_name_len =
4887 nfs4_init_nonuniform_client_string(clp,
4888 setclientid.sc_name,
4889 sizeof(setclientid.sc_name));
de734831 4890 /* cb_client4 */
e984a55a 4891 rcu_read_lock();
de734831 4892 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
fe2d5395 4893 sizeof(setclientid.sc_netid), "%s",
d4d3c507
CL		 4894 rpc_peeraddr2str(clp->cl_rpcclient,
4895 RPC_DISPLAY_NETID));
de734831
CL		 4896 rcu_read_unlock();
4897 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4898 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4899 clp->cl_ipaddr, port >> 8, port & 255);
4900
6bbb4ae8
CL		 4901 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4902 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4903 setclientid.sc_name_len, setclientid.sc_name);
4904 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4905 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 4906 dprintk("NFS reply setclientid: %d\n", status);
4907 return status;
1da177e4
LT		 4908}
4909
6bbb4ae8
CL		 4910/**
4911 * nfs4_proc_setclientid_confirm - Confirm client ID
4912 * @clp: state data structure
4913 * @res: result of a previous SETCLIENTID
4914 * @cred: RPC credential to use for this call
4915 *
4916 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4917 */
fd954ae1 4918int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4919 struct nfs4_setclientid_res *arg,
4920 struct rpc_cred *cred)
1da177e4 4921{
1da177e4
LT		 4922 struct rpc_message msg = {
4923 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4924 .rpc_argp = arg,
286d7d6a 4925 .rpc_cred = cred,
1da177e4 4926 };
1da177e4
LT		 4927 int status;
4928
6bbb4ae8
CL		 4929 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4930 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4931 clp->cl_clientid);
1bd714f2 4932 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4933 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 4934 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4935 return status;
4936}
4937
fe650407
TM		 4938struct nfs4_delegreturndata {
4939 struct nfs4_delegreturnargs args;
fa178f29 4940 struct nfs4_delegreturnres res;
fe650407
TM		 4941 struct nfs_fh fh;
4942 nfs4_stateid stateid;
26e976a8 4943 unsigned long timestamp;
fa178f29 4944 struct nfs_fattr fattr;
fe650407
TM		 4945 int rpc_status;
4946};
4947
fe650407
TM		 4948static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4949{
4950 struct nfs4_delegreturndata *data = calldata;
938e1010 4951
14516c3a
TM		 4952 if (!nfs4_sequence_done(task, &data->res.seq_res))
4953 return;
938e1010 4954
ca8acf8d 4955 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861
RL		 4956 switch (task->tk_status) {
4957 case -NFS4ERR_STALE_STATEID:
4958 case -NFS4ERR_EXPIRED:
4959 case 0:
fa178f29 4960 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4961 break;
4962 default:
4963 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4964 -EAGAIN) {
d00c5d43 4965 rpc_restart_call_prepare(task);
79708861
RL		 4966 return;
4967 }
4968 }
4969 data->rpc_status = task->tk_status;
fe650407
TM		 4970}
4971
4972static void nfs4_delegreturn_release(void *calldata)
4973{
fe650407
TM		 4974 kfree(calldata);
4975}
4976
938e1010
AA		 4977static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4978{
4979 struct nfs4_delegreturndata *d_data;
4980
4981 d_data = (struct nfs4_delegreturndata *)data;
4982
d9afbd1b
TM		 4983 nfs4_setup_sequence(d_data->res.server,
4984 &d_data->args.seq_args,
4985 &d_data->res.seq_res,
4986 task);
938e1010 4987}
938e1010 4988
c8d149f3 4989static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 4990 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 4991 .rpc_call_done = nfs4_delegreturn_done,
4992 .rpc_release = nfs4_delegreturn_release,
4993};
4994
e6f81075 4995static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4996{
4997 struct nfs4_delegreturndata *data;
fa178f29 4998 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4999 struct rpc_task *task;
5138fde0
TM		 5000 struct rpc_message msg = {
5001 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5002 .rpc_cred = cred,
5003 };
c970aa85
TM		 5004 struct rpc_task_setup task_setup_data = {
5005 .rpc_client = server->client,
5138fde0 5006 .rpc_message = &msg,
c970aa85
TM		 5007 .callback_ops = &nfs4_delegreturn_ops,
5008 .flags = RPC_TASK_ASYNC,
5009 };
e6f81075 5010 int status = 0;
fe650407 5011
8535b2be 5012 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5013 if (data == NULL)
5014 return -ENOMEM;
a9c92d6b 5015 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5016 data->args.fhandle = &data->fh;
5017 data->args.stateid = &data->stateid;
9e907fec 5018 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5019 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5020 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5021 data->res.fattr = &data->fattr;
5022 data->res.server = server;
5138fde0 5023 nfs_fattr_init(data->res.fattr);
26e976a8 5024 data->timestamp = jiffies;
fe650407
TM		 5025 data->rpc_status = 0;
5026
c970aa85 5027 task_setup_data.callback_data = data;
1174dd1f
TM		 5028 msg.rpc_argp = &data->args;
5029 msg.rpc_resp = &data->res;
c970aa85 5030 task = rpc_run_task(&task_setup_data);
7a1218a2 5031 if (IS_ERR(task))
fe650407 5032 return PTR_ERR(task);
e6f81075
TM		 5033 if (!issync)
5034 goto out;
fe650407 5035 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5036 if (status != 0)
5037 goto out;
5038 status = data->rpc_status;
e144cbcc
TM		 5039 if (status == 0)
5040 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5041 else
5042 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5043out:
e6b3c4db 5044 rpc_put_task(task);
fe650407 5045 return status;
1da177e4
LT		 5046}
5047
e6f81075 5048int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5049{
5050 struct nfs_server *server = NFS_SERVER(inode);
5051 struct nfs4_exception exception = { };
5052 int err;
5053 do {
e6f81075 5054 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5055 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5056 switch (err) {
5057 case -NFS4ERR_STALE_STATEID:
5058 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5059 case 0:
5060 return 0;
5061 }
5062 err = nfs4_handle_exception(server, err, &exception);
5063 } while (exception.retry);
5064 return err;
5065}
5066
5067#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5068#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5069
5070/*
5071 * sleep, with exponential backoff, and retry the LOCK operation.
5072 */
5073static unsigned long
5074nfs4_set_lock_task_retry(unsigned long timeout)
5075{
416ad3c9 5076 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5077 timeout <<= 1;
5078 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5079 return NFS4_LOCK_MAXTIMEOUT;
5080 return timeout;
5081}
5082
1da177e4
LT		 5083static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5084{
5085 struct inode *inode = state->inode;
5086 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5087 struct nfs_client *clp = server->nfs_client;
911d1aaf 5088 struct nfs_lockt_args arg = {
1da177e4 5089 .fh = NFS_FH(inode),
911d1aaf 5090 .fl = request,
1da177e4 5091 };
911d1aaf
TM		 5092 struct nfs_lockt_res res = {
5093 .denied = request,
1da177e4
LT		 5094 };
5095 struct rpc_message msg = {
5096 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5097 .rpc_argp = &arg,
5098 .rpc_resp = &res,
5099 .rpc_cred = state->owner->so_cred,
5100 };
1da177e4
LT		 5101 struct nfs4_lock_state *lsp;
5102 int status;
5103
911d1aaf 5104 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5105 status = nfs4_set_lock_state(state, request);
5106 if (status != 0)
5107 goto out;
5108 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5109 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5110 arg.lock_owner.s_dev = server->s_dev;
7c513058 5111 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5112 switch (status) {
5113 case 0:
5114 request->fl_type = F_UNLCK;
5115 break;
5116 case -NFS4ERR_DENIED:
5117 status = 0;
1da177e4 5118 }
70cc6487 5119 request->fl_ops->fl_release_private(request);
a6f951dd 5120 request->fl_ops = NULL;
8d0a8a9d 5121out:
1da177e4
LT		 5122 return status;
5123}
5124
5125static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5126{
5127 struct nfs4_exception exception = { };
5128 int err;
5129
5130 do {
d1b748a5
TM		 5131 err = _nfs4_proc_getlk(state, cmd, request);
5132 trace_nfs4_get_lock(request, state, cmd, err);
5133 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5134 &exception);
5135 } while (exception.retry);
5136 return err;
5137}
5138
5139static int do_vfs_lock(struct file *file, struct file_lock *fl)
5140{
5141 int res = 0;
5142 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5143 case FL_POSIX:
5144 res = posix_lock_file_wait(file, fl);
5145 break;
5146 case FL_FLOCK:
5147 res = flock_lock_file_wait(file, fl);
5148 break;
5149 default:
5150 BUG();
5151 }
1da177e4
LT		 5152 return res;
5153}
5154
faf5f49c 5155struct nfs4_unlockdata {
911d1aaf
TM		 5156 struct nfs_locku_args arg;
5157 struct nfs_locku_res res;
faf5f49c
TM		 5158 struct nfs4_lock_state *lsp;
5159 struct nfs_open_context *ctx;
911d1aaf
TM		 5160 struct file_lock fl;
5161 const struct nfs_server *server;
26e976a8 5162 unsigned long timestamp;
faf5f49c
TM		 5163};
5164
911d1aaf
TM		 5165static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5166 struct nfs_open_context *ctx,
5167 struct nfs4_lock_state *lsp,
5168 struct nfs_seqid *seqid)
5169{
5170 struct nfs4_unlockdata *p;
5171 struct inode *inode = lsp->ls_state->inode;
5172
8535b2be 5173 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5174 if (p == NULL)
5175 return NULL;
5176 p->arg.fh = NFS_FH(inode);
5177 p->arg.fl = &p->fl;
5178 p->arg.seqid = seqid;
c1d51931 5179 p->res.seqid = seqid;
911d1aaf
TM		 5180 p->arg.stateid = &lsp->ls_stateid;
5181 p->lsp = lsp;
5182 atomic_inc(&lsp->ls_count);
5183 /* Ensure we don't close file until we're done freeing locks! */
5184 p->ctx = get_nfs_open_context(ctx);
5185 memcpy(&p->fl, fl, sizeof(p->fl));
5186 p->server = NFS_SERVER(inode);
5187 return p;
5188}
5189
06f814a3 5190static void nfs4_locku_release_calldata(void *data)
faf5f49c 5191{
963d8fe5 5192 struct nfs4_unlockdata *calldata = data;
911d1aaf 5193 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5194 nfs4_put_lock_state(calldata->lsp);
5195 put_nfs_open_context(calldata->ctx);
5196 kfree(calldata);
faf5f49c
TM		 5197}
5198
963d8fe5 5199static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5200{
963d8fe5 5201 struct nfs4_unlockdata *calldata = data;
faf5f49c 5202
14516c3a
TM		 5203 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5204 return;
faf5f49c
TM		 5205 switch (task->tk_status) {
5206 case 0:
f597c537
TM		 5207 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5208 &calldata->res.stateid);
26e976a8 5209 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5210 break;
9e33bed5
TM		 5211 case -NFS4ERR_BAD_STATEID:
5212 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5213 case -NFS4ERR_STALE_STATEID:
5214 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5215 break;
5216 default:
9e33bed5 5217 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 5218 rpc_restart_call_prepare(task);
faf5f49c 5219 }
2b1bc308 5220 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5221}
5222
4ce70ada 5223static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5224{
4ce70ada 5225 struct nfs4_unlockdata *calldata = data;
faf5f49c 5226
911d1aaf 5227 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5228 goto out_wait;
795a88c9 5229 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5230 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5231 goto out_no_action;
faf5f49c 5232 }
26e976a8 5233 calldata->timestamp = jiffies;
035168ab 5234 if (nfs4_setup_sequence(calldata->server,
a893693c 5235 &calldata->arg.seq_args,
2240a9e2
TM		 5236 &calldata->res.seq_res,
5237 task) != 0)
5238 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5239 return;
5240out_no_action:
5241 task->tk_action = NULL;
5242out_wait:
5243 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5244}
5245
963d8fe5 5246static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5247 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5248 .rpc_call_done = nfs4_locku_done,
06f814a3 5249 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5250};
5251
a5d16a4d
TM		 5252static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5253 struct nfs_open_context *ctx,
5254 struct nfs4_lock_state *lsp,
5255 struct nfs_seqid *seqid)
5256{
5257 struct nfs4_unlockdata *data;
5138fde0
TM		 5258 struct rpc_message msg = {
5259 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5260 .rpc_cred = ctx->cred,
5261 };
c970aa85
TM		 5262 struct rpc_task_setup task_setup_data = {
5263 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5264 .rpc_message = &msg,
c970aa85 5265 .callback_ops = &nfs4_locku_ops,
101070ca 5266 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5267 .flags = RPC_TASK_ASYNC,
5268 };
a5d16a4d 5269
fa940720
WAA		 5270 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5271 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5272
137d6aca
FF		 5273 /* Ensure this is an unlock - when canceling a lock, the
5274 * canceled lock is passed in, and it won't be an unlock.
5275 */
5276 fl->fl_type = F_UNLCK;
5277
a5d16a4d
TM		 5278 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5279 if (data == NULL) {
5280 nfs_free_seqid(seqid);
5281 return ERR_PTR(-ENOMEM);
5282 }
5283
a9c92d6b 5284 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5285 msg.rpc_argp = &data->arg;
5286 msg.rpc_resp = &data->res;
c970aa85
TM		 5287 task_setup_data.callback_data = data;
5288 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5289}
5290
faf5f49c
TM		 5291static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5292{
65b62a29
TM		 5293 struct inode *inode = state->inode;
5294 struct nfs4_state_owner *sp = state->owner;
5295 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5296 struct nfs_seqid *seqid;
1da177e4 5297 struct nfs4_lock_state *lsp;
06f814a3
TM		 5298 struct rpc_task *task;
5299 int status = 0;
536ff0f8 5300 unsigned char fl_flags = request->fl_flags;
faf5f49c 5301
8d0a8a9d 5302 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5303 /* Unlock _before_ we do the RPC call */
5304 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5305 /* Exclude nfs_delegation_claim_locks() */
5306 mutex_lock(&sp->so_delegreturn_mutex);
5307 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5308 down_read(&nfsi->rwsem);
5309 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5310 up_read(&nfsi->rwsem);
65b62a29 5311 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5312 goto out;
19e03c57
TM		 5313 }
5314 up_read(&nfsi->rwsem);
65b62a29 5315 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5316 if (status != 0)
9b073574
TM		 5317 goto out;
5318 /* Is this a delegated lock? */
8d0a8a9d 5319 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5320 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5321 goto out;
8535b2be 5322 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5323 status = -ENOMEM;
911d1aaf 5324 if (seqid == NULL)
9b073574 5325 goto out;
cd3758e3 5326 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5327 status = PTR_ERR(task);
5328 if (IS_ERR(task))
9b073574 5329 goto out;
a5d16a4d 5330 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5331 rpc_put_task(task);
9b073574 5332out:
536ff0f8 5333 request->fl_flags = fl_flags;
d1b748a5 5334 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5335 return status;
5336}
5337
a5d16a4d
TM		 5338struct nfs4_lockdata {
5339 struct nfs_lock_args arg;
5340 struct nfs_lock_res res;
5341 struct nfs4_lock_state *lsp;
5342 struct nfs_open_context *ctx;
5343 struct file_lock fl;
26e976a8 5344 unsigned long timestamp;
a5d16a4d
TM		 5345 int rpc_status;
5346 int cancelled;
66179efe 5347 struct nfs_server *server;
a5d16a4d
TM		 5348};
5349
5350static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5351 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5352 gfp_t gfp_mask)
1da177e4 5353{
a5d16a4d
TM		 5354 struct nfs4_lockdata *p;
5355 struct inode *inode = lsp->ls_state->inode;
1da177e4 5356 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5357
8535b2be 5358 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5359 if (p == NULL)
5360 return NULL;
5361
5362 p->arg.fh = NFS_FH(inode);
5363 p->arg.fl = &p->fl;
8535b2be 5364 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5365 if (p->arg.open_seqid == NULL)
5366 goto out_free;
8535b2be 5367 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5368 if (p->arg.lock_seqid == NULL)
2f74c0a0 5369 goto out_free_seqid;
a5d16a4d 5370 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5371 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5372 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5373 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5374 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5375 p->lsp = lsp;
66179efe 5376 p->server = server;
a5d16a4d
TM		 5377 atomic_inc(&lsp->ls_count);
5378 p->ctx = get_nfs_open_context(ctx);
5379 memcpy(&p->fl, fl, sizeof(p->fl));
5380 return p;
2f74c0a0
TM		 5381out_free_seqid:
5382 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5383out_free:
5384 kfree(p);
5385 return NULL;
5386}
5387
5388static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5389{
5390 struct nfs4_lockdata *data = calldata;
5391 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5392
3110ff80 5393 dprintk("%s: begin!\n", __func__);
2f74c0a0 5394 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5395 goto out_wait;
a5d16a4d
TM		 5396 /* Do we need to do an open_to_lock_owner? */
5397 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5398 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5399 goto out_release_lock_seqid;
8fe72bac 5400 }
8e472f33 5401 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5402 data->arg.new_lock_owner = 1;
c1d51931 5403 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5404 } else
5405 data->arg.new_lock_owner = 0;
5d422301
TM		 5406 if (!nfs4_valid_open_stateid(state)) {
5407 data->rpc_status = -EBADF;
5408 task->tk_action = NULL;
5409 goto out_release_open_seqid;
5410 }
26e976a8 5411 data->timestamp = jiffies;
035168ab
TM		 5412 if (nfs4_setup_sequence(data->server,
5413 &data->arg.seq_args,
2240a9e2 5414 &data->res.seq_res,
d9afbd1b 5415 task) == 0)
66179efe 5416 return;
5d422301 5417out_release_open_seqid:
2240a9e2
TM		 5418 nfs_release_seqid(data->arg.open_seqid);
5419out_release_lock_seqid:
5420 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5421out_wait:
5422 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5423 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5424}
5425
a5d16a4d
TM		 5426static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5427{
5428 struct nfs4_lockdata *data = calldata;
5429
3110ff80 5430 dprintk("%s: begin!\n", __func__);
a5d16a4d 5431
14516c3a
TM		 5432 if (!nfs4_sequence_done(task, &data->res.seq_res))
5433 return;
66179efe 5434
a5d16a4d 5435 data->rpc_status = task->tk_status;
a5d16a4d 5436 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5437 if (data->rpc_status == 0)
5438 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5439 else
5440 goto out;
5441 }
5442 if (data->rpc_status == 0) {
f597c537 5443 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5444 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5445 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5446 }
a5d16a4d 5447out:
3110ff80 5448 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5449}
5450
5451static void nfs4_lock_release(void *calldata)
5452{
5453 struct nfs4_lockdata *data = calldata;
5454
3110ff80 5455 dprintk("%s: begin!\n", __func__);
2f74c0a0 5456 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5457 if (data->cancelled != 0) {
5458 struct rpc_task *task;
5459 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5460 data->arg.lock_seqid);
5461 if (!IS_ERR(task))
bf294b41 5462 rpc_put_task_async(task);
3110ff80 5463 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5464 } else
5465 nfs_free_seqid(data->arg.lock_seqid);
5466 nfs4_put_lock_state(data->lsp);
5467 put_nfs_open_context(data->ctx);
5468 kfree(data);
3110ff80 5469 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5470}
5471
5472static const struct rpc_call_ops nfs4_lock_ops = {
5473 .rpc_call_prepare = nfs4_lock_prepare,
5474 .rpc_call_done = nfs4_lock_done,
5475 .rpc_release = nfs4_lock_release,
5476};
5477
2bee72a6
TM		 5478static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5479{
2bee72a6
TM		 5480 switch (error) {
5481 case -NFS4ERR_ADMIN_REVOKED:
5482 case -NFS4ERR_BAD_STATEID:
ecac799a 5483 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5484 if (new_lock_owner != 0 ||
795a88c9 5485 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5486 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5487 break;
5488 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5489 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5490 case -NFS4ERR_EXPIRED:
5491 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5492 };
5493}
5494
afe6c27c 5495static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5496{
5497 struct nfs4_lockdata *data;
5498 struct rpc_task *task;
5138fde0
TM		 5499 struct rpc_message msg = {
5500 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5501 .rpc_cred = state->owner->so_cred,
5502 };
c970aa85
TM		 5503 struct rpc_task_setup task_setup_data = {
5504 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5505 .rpc_message = &msg,
c970aa85 5506 .callback_ops = &nfs4_lock_ops,
101070ca 5507 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5508 .flags = RPC_TASK_ASYNC,
5509 };
a5d16a4d
TM		 5510 int ret;
5511
3110ff80 5512 dprintk("%s: begin!\n", __func__);
cd3758e3 5513 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5514 fl->fl_u.nfs4_fl.owner,
5515 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5516 if (data == NULL)
5517 return -ENOMEM;
5518 if (IS_SETLKW(cmd))
5519 data->arg.block = 1;
a9c92d6b 5520 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5521 msg.rpc_argp = &data->arg;
5522 msg.rpc_resp = &data->res;
c970aa85 5523 task_setup_data.callback_data = data;
8fe72bac
TM		 5524 if (recovery_type > NFS_LOCK_NEW) {
5525 if (recovery_type == NFS_LOCK_RECLAIM)
5526 data->arg.reclaim = NFS_LOCK_RECLAIM;
5527 nfs4_set_sequence_privileged(&data->arg.seq_args);
5528 }
c970aa85 5529 task = rpc_run_task(&task_setup_data);
7a1218a2 5530 if (IS_ERR(task))
a5d16a4d 5531 return PTR_ERR(task);
a5d16a4d
TM		 5532 ret = nfs4_wait_for_completion_rpc_task(task);
5533 if (ret == 0) {
5534 ret = data->rpc_status;
2bee72a6
TM		 5535 if (ret)
5536 nfs4_handle_setlk_error(data->server, data->lsp,
5537 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5538 } else
5539 data->cancelled = 1;
e6b3c4db 5540 rpc_put_task(task);
3110ff80 5541 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5542 return ret;
1da177e4
LT		 5543}
5544
5545static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5546{
202b50dc 5547 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5548 struct nfs4_exception exception = {
5549 .inode = state->inode,
5550 };
202b50dc
TM		 5551 int err;
5552
5553 do {
42a2d13e
TM		 5554 /* Cache the lock if possible... */
5555 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5556 return 0;
afe6c27c 5557 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5558 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5559 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5560 break;
5561 nfs4_handle_exception(server, err, &exception);
5562 } while (exception.retry);
5563 return err;
1da177e4
LT		 5564}
5565
5566static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5567{
202b50dc 5568 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5569 struct nfs4_exception exception = {
5570 .inode = state->inode,
5571 };
202b50dc
TM		 5572 int err;
5573
6bfc93ef
TM		 5574 err = nfs4_set_lock_state(state, request);
5575 if (err != 0)
5576 return err;
f6de7a39 5577 if (!recover_lost_locks) {
ef1820f9
N		 5578 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5579 return 0;
5580 }
202b50dc 5581 do {
42a2d13e
TM		 5582 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5583 return 0;
afe6c27c 5584 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5585 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5586 switch (err) {
5587 default:
5588 goto out;
5589 case -NFS4ERR_GRACE:
5590 case -NFS4ERR_DELAY:
5591 nfs4_handle_exception(server, err, &exception);
5592 err = 0;
5593 }
202b50dc 5594 } while (exception.retry);
a9ed2e25 5595out:
202b50dc 5596 return err;
1da177e4
LT		 5597}
5598
f062eb6c 5599#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5600/**
5601 * nfs41_check_expired_locks - possibly free a lock stateid
5602 *
5603 * @state: NFSv4 state for an inode
5604 *
5605 * Returns NFS_OK if recovery for this stateid is now finished.
5606 * Otherwise a negative NFS4ERR value is returned.
5607 */
b01dd1d8 5608static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5609{
eb64cf96 5610 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5611 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5612 struct nfs_server *server = NFS_SERVER(state->inode);
5613
b01dd1d8 5614 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5615 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5616 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5617
5618 status = nfs41_test_stateid(server,
5619 &lsp->ls_stateid,
5620 cred);
08cb47fa 5621 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5622 if (status != NFS_OK) {
3e60ffdd
CL		 5623 /* Free the stateid unless the server
5624 * informs us the stateid is unrecognized. */
89af2739
CL		 5625 if (status != -NFS4ERR_BAD_STATEID)
5626 nfs41_free_stateid(server,
ab7cb0df
TM		 5627 &lsp->ls_stateid,
5628 cred);
795a88c9 5629 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5630 ret = status;
5631 }
5632 }
5633 };
5634
5635 return ret;
5636}
5637
5638static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5639{
5640 int status = NFS_OK;
5641
5642 if (test_bit(LK_STATE_IN_USE, &state->flags))
5643 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5644 if (status != NFS_OK)
5645 status = nfs4_lock_expired(state, request);
5646 return status;
f062eb6c
BS		 5647}
5648#endif
5649
1da177e4
LT		 5650static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5651{
9a99af49 5652 struct nfs4_state_owner *sp = state->owner;
19e03c57 5653 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5654 unsigned char fl_flags = request->fl_flags;
9a99af49 5655 unsigned int seq;
8e469ebd 5656 int status = -ENOLCK;
1da177e4 5657
8e469ebd
TM		 5658 if ((fl_flags & FL_POSIX) &&
5659 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5660 goto out;
6bfc93ef 5661 /* Is this a delegated open? */
6bfc93ef
TM		 5662 status = nfs4_set_lock_state(state, request);
5663 if (status != 0)
5664 goto out;
01c3b861
TM		 5665 request->fl_flags |= FL_ACCESS;
5666 status = do_vfs_lock(request->fl_file, request);
5667 if (status < 0)
5668 goto out;
19e03c57 5669 down_read(&nfsi->rwsem);
01c3b861 5670 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5671 /* Yes: cache locks! */
01c3b861 5672 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5673 request->fl_flags = fl_flags & ~FL_SLEEP;
5674 status = do_vfs_lock(request->fl_file, request);
5675 goto out_unlock;
01c3b861 5676 }
9a99af49
TM		 5677 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5678 up_read(&nfsi->rwsem);
afe6c27c 5679 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5680 if (status != 0)
9a99af49
TM		 5681 goto out;
5682 down_read(&nfsi->rwsem);
5683 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5684 status = -NFS4ERR_DELAY;
01c3b861 5685 goto out_unlock;
9a99af49 5686 }
6bfc93ef 5687 /* Note: we always want to sleep here! */
01c3b861 5688 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5689 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5690 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5691 "manager!\n", __func__);
01c3b861 5692out_unlock:
19e03c57 5693 up_read(&nfsi->rwsem);
01c3b861
TM		 5694out:
5695 request->fl_flags = fl_flags;
1da177e4
LT		 5696 return status;
5697}
5698
5699static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5700{
a1d0b5ee
TM		 5701 struct nfs4_exception exception = {
5702 .state = state,
05ffe24f 5703 .inode = state->inode,
a1d0b5ee 5704 };
1da177e4
LT		 5705 int err;
5706
5707 do {
965b5d67 5708 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5709 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5710 if (err == -NFS4ERR_DENIED)
5711 err = -EAGAIN;
1da177e4 5712 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5713 err, &exception);
1da177e4
LT		 5714 } while (exception.retry);
5715 return err;
5716}
5717
5718static int
5719nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5720{
5721 struct nfs_open_context *ctx;
5722 struct nfs4_state *state;
5723 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5724 int status;
5725
5726 /* verify open state */
cd3758e3 5727 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5728 state = ctx->state;
5729
5730 if (request->fl_start < 0 || request->fl_end < 0)
5731 return -EINVAL;
5732
d953126a
TM		 5733 if (IS_GETLK(cmd)) {
5734 if (state != NULL)
5735 return nfs4_proc_getlk(state, F_GETLK, request);
5736 return 0;
5737 }
1da177e4
LT		 5738
5739 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5740 return -EINVAL;
5741
d953126a
TM		 5742 if (request->fl_type == F_UNLCK) {
5743 if (state != NULL)
5744 return nfs4_proc_unlck(state, cmd, request);
5745 return 0;
5746 }
1da177e4 5747
d953126a
TM		 5748 if (state == NULL)
5749 return -ENOLCK;
55725513
TM		 5750 /*
5751 * Don't rely on the VFS having checked the file open mode,
5752 * since it won't do this for flock() locks.
5753 */
f44106e2 5754 switch (request->fl_type) {
55725513
TM		 5755 case F_RDLCK:
5756 if (!(filp->f_mode & FMODE_READ))
5757 return -EBADF;
5758 break;
5759 case F_WRLCK:
5760 if (!(filp->f_mode & FMODE_WRITE))
5761 return -EBADF;
5762 }
5763
1da177e4
LT		 5764 do {
5765 status = nfs4_proc_setlk(state, cmd, request);
5766 if ((status != -EAGAIN) || IS_SETLK(cmd))
5767 break;
5768 timeout = nfs4_set_lock_task_retry(timeout);
5769 status = -ERESTARTSYS;
5770 if (signalled())
5771 break;
5772 } while(status < 0);
1da177e4
LT		 5773 return status;
5774}
5775
db4f2e63 5776int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5777{
5778 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5779 int err;
5780
5781 err = nfs4_set_lock_state(state, fl);
5782 if (err != 0)
db4f2e63 5783 return err;
4a706fa0 5784 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5785 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5786}
6b3b5496 5787
cf470c3e
TM		 5788struct nfs_release_lockowner_data {
5789 struct nfs4_lock_state *lsp;
5ae67c4f 5790 struct nfs_server *server;
cf470c3e 5791 struct nfs_release_lockowner_args args;
fbd4bfd1
CL		 5792 struct nfs4_sequence_args seq_args;
5793 struct nfs4_sequence_res seq_res;
cf470c3e
TM		 5794};
5795
fbd4bfd1
CL		 5796static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5797{
5798 struct nfs_release_lockowner_data *data = calldata;
5799 nfs40_setup_sequence(data->server,
5800 &data->seq_args, &data->seq_res, task);
5801}
5802
5803static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5804{
5805 struct nfs_release_lockowner_data *data = calldata;
5806 nfs40_sequence_done(task, &data->seq_res);
5807}
5808
d3c7b7cc
TM		 5809static void nfs4_release_lockowner_release(void *calldata)
5810{
cf470c3e 5811 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5812 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5813 kfree(calldata);
5814}
5815
17280175 5816static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 5817 .rpc_call_prepare = nfs4_release_lockowner_prepare,
5818 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 5819 .rpc_release = nfs4_release_lockowner_release,
5820};
5821
c8b2d0bf 5822static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5823{
cf470c3e 5824 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5825 struct rpc_message msg = {
5826 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5827 };
5828
5829 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e 5830 return -EINVAL;
fbd4bfd1 5831
cf470c3e
TM		 5832 data = kmalloc(sizeof(*data), GFP_NOFS);
5833 if (!data)
5834 return -ENOMEM;
fbd4bfd1 5835 nfs4_init_sequence(&data->seq_args, &data->seq_res, 0);
cf470c3e 5836 data->lsp = lsp;
5ae67c4f 5837 data->server = server;
cf470c3e
TM		 5838 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5839 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5840 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 5841
cf470c3e
TM		 5842 msg.rpc_argp = &data->args;
5843 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5844 return 0;
d3c7b7cc
TM		 5845}
5846
aa1870af
BF		 5847#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5848
64c2ce8b
AK		 5849static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5850 const void *buf, size_t buflen,
5851 int flags, int type)
6b3b5496 5852{
64c2ce8b
AK		 5853 if (strcmp(key, "") != 0)
5854 return -EINVAL;
4b580ee3 5855
64c2ce8b 5856 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5857}
5858
64c2ce8b
AK		 5859static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5860 void *buf, size_t buflen, int type)
6b3b5496 5861{
64c2ce8b
AK		 5862 if (strcmp(key, "") != 0)
5863 return -EINVAL;
aa1870af 5864
64c2ce8b 5865 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5866}
5867
64c2ce8b
AK		 5868static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5869 size_t list_len, const char *name,
5870 size_t name_len, int type)
6b3b5496 5871{
64c2ce8b 5872 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5873
096455a2
BF		 5874 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5875 return 0;
64c2ce8b
AK		 5876
5877 if (list && len <= list_len)
5878 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5879 return len;
6b3b5496
BF		 5880}
5881
c9bccef6
DQ		 5882#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5883static inline int nfs4_server_supports_labels(struct nfs_server *server)
5884{
5885 return server->caps & NFS_CAP_SECURITY_LABEL;
5886}
5887
5888static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
5889 const void *buf, size_t buflen,
5890 int flags, int type)
5891{
5892 if (security_ismaclabel(key))
5893 return nfs4_set_security_label(dentry, buf, buflen);
5894
5895 return -EOPNOTSUPP;
5896}
5897
5898static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
5899 void *buf, size_t buflen, int type)
5900{
5901 if (security_ismaclabel(key))
5902 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
5903 return -EOPNOTSUPP;
5904}
5905
5906static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
5907 size_t list_len, const char *name,
5908 size_t name_len, int type)
5909{
5910 size_t len = 0;
5911
5912 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
5913 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
5914 if (list && len <= list_len)
5915 security_inode_listsecurity(dentry->d_inode, list, len);
5916 }
5917 return len;
5918}
5919
5920static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
5921 .prefix = XATTR_SECURITY_PREFIX,
5922 .list = nfs4_xattr_list_nfs4_label,
5923 .get = nfs4_xattr_get_nfs4_label,
5924 .set = nfs4_xattr_set_nfs4_label,
5925};
5926#endif
5927
5928
533eb461
AA		 5929/*
5930 * nfs_fhget will use either the mounted_on_fileid or the fileid
5931 */
69aaaae1
TM		 5932static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5933{
533eb461
AA		 5934 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5935 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5936 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5937 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5938 return;
5939
5940 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5941 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5942 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5943 fattr->nlink = 2;
5944}
5945
f05d147f
BS		 5946static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5947 const struct qstr *name,
5948 struct nfs4_fs_locations *fs_locations,
5949 struct page *page)
683b57b4
TM		 5950{
5951 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 5952 u32 bitmask[3] = {
361e624f 5953 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5954 };
5955 struct nfs4_fs_locations_arg args = {
5956 .dir_fh = NFS_FH(dir),
c228fd3a 5957 .name = name,
683b57b4
TM		 5958 .page = page,
5959 .bitmask = bitmask,
5960 };
22958463
BH		 5961 struct nfs4_fs_locations_res res = {
5962 .fs_locations = fs_locations,
5963 };
683b57b4
TM		 5964 struct rpc_message msg = {
5965 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5966 .rpc_argp = &args,
22958463 5967 .rpc_resp = &res,
683b57b4
TM		 5968 };
5969 int status;
5970
3110ff80 5971 dprintk("%s: start\n", __func__);
533eb461
AA		 5972
5973 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5974 * is not supported */
5975 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5976 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5977 else
5978 bitmask[0] |= FATTR4_WORD0_FILEID;
5979
c228fd3a 5980 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5981 fs_locations->server = server;
830b8e33 5982 fs_locations->nlocations = 0;
f05d147f 5983 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5984 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5985 return status;
5986}
5987
f05d147f
BS		 5988int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5989 const struct qstr *name,
5990 struct nfs4_fs_locations *fs_locations,
5991 struct page *page)
db0a9593
BS		 5992{
5993 struct nfs4_exception exception = { };
5994 int err;
5995 do {
078ea3df
TM		 5996 err = _nfs4_proc_fs_locations(client, dir, name,
5997 fs_locations, page);
5998 trace_nfs4_get_fs_locations(dir, name, err);
5999 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6000 &exception);
6001 } while (exception.retry);
6002 return err;
6003}
6004
b03d735b
CL		 6005/*
6006 * This operation also signals the server that this client is
6007 * performing migration recovery. The server can stop returning
6008 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6009 * appended to this compound to identify the client ID which is
6010 * performing recovery.
6011 */
6012static int _nfs40_proc_get_locations(struct inode *inode,
6013 struct nfs4_fs_locations *locations,
6014 struct page *page, struct rpc_cred *cred)
6015{
6016 struct nfs_server *server = NFS_SERVER(inode);
6017 struct rpc_clnt *clnt = server->client;
6018 u32 bitmask[2] = {
6019 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6020 };
6021 struct nfs4_fs_locations_arg args = {
6022 .clientid = server->nfs_client->cl_clientid,
6023 .fh = NFS_FH(inode),
6024 .page = page,
6025 .bitmask = bitmask,
6026 .migration = 1, /* skip LOOKUP */
6027 .renew = 1, /* append RENEW */
6028 };
6029 struct nfs4_fs_locations_res res = {
6030 .fs_locations = locations,
6031 .migration = 1,
6032 .renew = 1,
6033 };
6034 struct rpc_message msg = {
6035 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6036 .rpc_argp = &args,
6037 .rpc_resp = &res,
6038 .rpc_cred = cred,
6039 };
6040 unsigned long now = jiffies;
6041 int status;
6042
6043 nfs_fattr_init(&locations->fattr);
6044 locations->server = server;
6045 locations->nlocations = 0;
6046
6047 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6048 nfs4_set_sequence_privileged(&args.seq_args);
6049 status = nfs4_call_sync_sequence(clnt, server, &msg,
6050 &args.seq_args, &res.seq_res);
6051 if (status)
6052 return status;
6053
6054 renew_lease(server, now);
6055 return 0;
6056}
6057
6058#ifdef CONFIG_NFS_V4_1
6059
6060/*
6061 * This operation also signals the server that this client is
6062 * performing migration recovery. The server can stop asserting
6063 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6064 * performing this operation is identified in the SEQUENCE
6065 * operation in this compound.
6066 *
6067 * When the client supports GETATTR(fs_locations_info), it can
6068 * be plumbed in here.
6069 */
6070static int _nfs41_proc_get_locations(struct inode *inode,
6071 struct nfs4_fs_locations *locations,
6072 struct page *page, struct rpc_cred *cred)
6073{
6074 struct nfs_server *server = NFS_SERVER(inode);
6075 struct rpc_clnt *clnt = server->client;
6076 u32 bitmask[2] = {
6077 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6078 };
6079 struct nfs4_fs_locations_arg args = {
6080 .fh = NFS_FH(inode),
6081 .page = page,
6082 .bitmask = bitmask,
6083 .migration = 1, /* skip LOOKUP */
6084 };
6085 struct nfs4_fs_locations_res res = {
6086 .fs_locations = locations,
6087 .migration = 1,
6088 };
6089 struct rpc_message msg = {
6090 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6091 .rpc_argp = &args,
6092 .rpc_resp = &res,
6093 .rpc_cred = cred,
6094 };
6095 int status;
6096
6097 nfs_fattr_init(&locations->fattr);
6098 locations->server = server;
6099 locations->nlocations = 0;
6100
6101 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6102 nfs4_set_sequence_privileged(&args.seq_args);
6103 status = nfs4_call_sync_sequence(clnt, server, &msg,
6104 &args.seq_args, &res.seq_res);
6105 if (status == NFS4_OK &&
6106 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6107 status = -NFS4ERR_LEASE_MOVED;
6108 return status;
6109}
6110
6111#endif /* CONFIG_NFS_V4_1 */
6112
6113/**
6114 * nfs4_proc_get_locations - discover locations for a migrated FSID
6115 * @inode: inode on FSID that is migrating
6116 * @locations: result of query
6117 * @page: buffer
6118 * @cred: credential to use for this operation
6119 *
6120 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6121 * operation failed, or a negative errno if a local error occurred.
6122 *
6123 * On success, "locations" is filled in, but if the server has
6124 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6125 * asserted.
6126 *
6127 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6128 * from this client that require migration recovery.
6129 */
6130int nfs4_proc_get_locations(struct inode *inode,
6131 struct nfs4_fs_locations *locations,
6132 struct page *page, struct rpc_cred *cred)
6133{
6134 struct nfs_server *server = NFS_SERVER(inode);
6135 struct nfs_client *clp = server->nfs_client;
6136 const struct nfs4_mig_recovery_ops *ops =
6137 clp->cl_mvops->mig_recovery_ops;
6138 struct nfs4_exception exception = { };
6139 int status;
6140
6141 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6142 (unsigned long long)server->fsid.major,
6143 (unsigned long long)server->fsid.minor,
6144 clp->cl_hostname);
6145 nfs_display_fhandle(NFS_FH(inode), __func__);
6146
6147 do {
6148 status = ops->get_locations(inode, locations, page, cred);
6149 if (status != -NFS4ERR_DELAY)
6150 break;
6151 nfs4_handle_exception(server, status, &exception);
6152 } while (exception.retry);
6153 return status;
6154}
6155
44c99933
CL		 6156/*
6157 * This operation also signals the server that this client is
6158 * performing "lease moved" recovery. The server can stop
6159 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6160 * is appended to this compound to identify the client ID which is
6161 * performing recovery.
6162 */
6163static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6164{
6165 struct nfs_server *server = NFS_SERVER(inode);
6166 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6167 struct rpc_clnt *clnt = server->client;
6168 struct nfs4_fsid_present_arg args = {
6169 .fh = NFS_FH(inode),
6170 .clientid = clp->cl_clientid,
6171 .renew = 1, /* append RENEW */
6172 };
6173 struct nfs4_fsid_present_res res = {
6174 .renew = 1,
6175 };
6176 struct rpc_message msg = {
6177 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6178 .rpc_argp = &args,
6179 .rpc_resp = &res,
6180 .rpc_cred = cred,
6181 };
6182 unsigned long now = jiffies;
6183 int status;
6184
6185 res.fh = nfs_alloc_fhandle();
6186 if (res.fh == NULL)
6187 return -ENOMEM;
6188
6189 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6190 nfs4_set_sequence_privileged(&args.seq_args);
6191 status = nfs4_call_sync_sequence(clnt, server, &msg,
6192 &args.seq_args, &res.seq_res);
6193 nfs_free_fhandle(res.fh);
6194 if (status)
6195 return status;
6196
6197 do_renew_lease(clp, now);
6198 return 0;
6199}
6200
6201#ifdef CONFIG_NFS_V4_1
6202
6203/*
6204 * This operation also signals the server that this client is
6205 * performing "lease moved" recovery. The server can stop asserting
6206 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6207 * this operation is identified in the SEQUENCE operation in this
6208 * compound.
6209 */
6210static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6211{
6212 struct nfs_server *server = NFS_SERVER(inode);
6213 struct rpc_clnt *clnt = server->client;
6214 struct nfs4_fsid_present_arg args = {
6215 .fh = NFS_FH(inode),
6216 };
6217 struct nfs4_fsid_present_res res = {
6218 };
6219 struct rpc_message msg = {
6220 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6221 .rpc_argp = &args,
6222 .rpc_resp = &res,
6223 .rpc_cred = cred,
6224 };
6225 int status;
6226
6227 res.fh = nfs_alloc_fhandle();
6228 if (res.fh == NULL)
6229 return -ENOMEM;
6230
6231 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6232 nfs4_set_sequence_privileged(&args.seq_args);
6233 status = nfs4_call_sync_sequence(clnt, server, &msg,
6234 &args.seq_args, &res.seq_res);
6235 nfs_free_fhandle(res.fh);
6236 if (status == NFS4_OK &&
6237 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6238 status = -NFS4ERR_LEASE_MOVED;
6239 return status;
6240}
6241
6242#endif /* CONFIG_NFS_V4_1 */
6243
6244/**
6245 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6246 * @inode: inode on FSID to check
6247 * @cred: credential to use for this operation
6248 *
6249 * Server indicates whether the FSID is present, moved, or not
6250 * recognized. This operation is necessary to clear a LEASE_MOVED
6251 * condition for this client ID.
6252 *
6253 * Returns NFS4_OK if the FSID is present on this server,
6254 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6255 * NFS4ERR code if some error occurred on the server, or a
6256 * negative errno if a local failure occurred.
6257 */
6258int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6259{
6260 struct nfs_server *server = NFS_SERVER(inode);
6261 struct nfs_client *clp = server->nfs_client;
6262 const struct nfs4_mig_recovery_ops *ops =
6263 clp->cl_mvops->mig_recovery_ops;
6264 struct nfs4_exception exception = { };
6265 int status;
6266
6267 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6268 (unsigned long long)server->fsid.major,
6269 (unsigned long long)server->fsid.minor,
6270 clp->cl_hostname);
6271 nfs_display_fhandle(NFS_FH(inode), __func__);
6272
6273 do {
6274 status = ops->fsid_present(inode, cred);
6275 if (status != -NFS4ERR_DELAY)
6276 break;
6277 nfs4_handle_exception(server, status, &exception);
6278 } while (exception.retry);
6279 return status;
6280}
6281
5ec16a85 6282/**
a5250def
WAA		 6283 * If 'use_integrity' is true and the state managment nfs_client
6284 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6285 * and the machine credential as per RFC3530bis and RFC5661 Security
6286 * Considerations sections. Otherwise, just use the user cred with the
6287 * filesystem's rpc_client.
5ec16a85 6288 */
a5250def 6289static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6290{
6291 int status;
6292 struct nfs4_secinfo_arg args = {
6293 .dir_fh = NFS_FH(dir),
6294 .name = name,
6295 };
6296 struct nfs4_secinfo_res res = {
6297 .flavors = flavors,
6298 };
6299 struct rpc_message msg = {
6300 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6301 .rpc_argp = &args,
6302 .rpc_resp = &res,
6303 };
a5250def 6304 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6305 struct rpc_cred *cred = NULL;
a5250def
WAA		 6306
6307 if (use_integrity) {
6308 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6309 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6310 msg.rpc_cred = cred;
a5250def 6311 }
5a5ea0d4
BS		 6312
6313 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6314
6315 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6316 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6317
a5250def
WAA		 6318 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6319 &res.seq_res, 0);
5a5ea0d4 6320 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6321
7cb852df
WAA		 6322 if (cred)
6323 put_rpccred(cred);
a5250def 6324
5a5ea0d4
BS		 6325 return status;
6326}
6327
72de53ec
BS		 6328int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6329 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6330{
6331 struct nfs4_exception exception = { };
6332 int err;
6333 do {
a5250def
WAA		 6334 err = -NFS4ERR_WRONGSEC;
6335
6336 /* try to use integrity protection with machine cred */
6337 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6338 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6339
6340 /*
6341 * if unable to use integrity protection, or SECINFO with
6342 * integrity protection returns NFS4ERR_WRONGSEC (which is
6343 * disallowed by spec, but exists in deployed servers) use
6344 * the current filesystem's rpc_client and the user cred.
6345 */
6346 if (err == -NFS4ERR_WRONGSEC)
6347 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6348
078ea3df
TM		 6349 trace_nfs4_secinfo(dir, name, err);
6350 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6351 &exception);
6352 } while (exception.retry);
6353 return err;
6354}
6355
557134a3 6356#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6357/*
6358 * Check the exchange flags returned by the server for invalid flags, having
6359 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6360 * DS flags set.
6361 */
6362static int nfs4_check_cl_exchange_flags(u32 flags)
6363{
6364 if (flags & ~EXCHGID4_FLAG_MASK_R)
6365 goto out_inval;
6366 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6367 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6368 goto out_inval;
6369 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6370 goto out_inval;
6371 return NFS_OK;
6372out_inval:
6373 return -NFS4ERR_INVAL;
6374}
6375
78fe0f41 6376static bool
79d4e1f0
CL		 6377nfs41_same_server_scope(struct nfs41_server_scope *a,
6378 struct nfs41_server_scope *b)
78fe0f41
WAA		 6379{
6380 if (a->server_scope_sz == b->server_scope_sz &&
6381 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6382 return true;
6383
6384 return false;
6385}
6386
7c44f1ae
WAA		 6387/*
6388 * nfs4_proc_bind_conn_to_session()
6389 *
6390 * The 4.1 client currently uses the same TCP connection for the
6391 * fore and backchannel.
6392 */
2cf047c9 6393int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6394{
6395 int status;
6396 struct nfs41_bind_conn_to_session_res res;
6397 struct rpc_message msg = {
6398 .rpc_proc =
6399 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6400 .rpc_argp = clp,
6401 .rpc_resp = &res,
2cf047c9 6402 .rpc_cred = cred,
7c44f1ae
WAA		 6403 };
6404
6405 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 6406
6407 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6408 if (unlikely(res.session == NULL)) {
6409 status = -ENOMEM;
6410 goto out;
6411 }
6412
6413 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6414 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 6415 if (status == 0) {
6416 if (memcmp(res.session->sess_id.data,
6417 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6418 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6419 status = -EIO;
6420 goto out_session;
6421 }
6422 if (res.dir != NFS4_CDFS4_BOTH) {
6423 dprintk("NFS: %s: Unexpected direction from server\n",
6424 __func__);
6425 status = -EIO;
6426 goto out_session;
6427 }
6428 if (res.use_conn_in_rdma_mode) {
6429 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6430 __func__);
6431 status = -EIO;
6432 goto out_session;
6433 }
6434 }
6435out_session:
6436 kfree(res.session);
6437out:
6438 dprintk("<-- %s status= %d\n", __func__, status);
6439 return status;
6440}
6441
99fe60d0 6442/*
fa940720
WAA		 6443 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6444 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6445 */
6446static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6447 .how = SP4_MACH_CRED,
6448 .enforce.u.words = {
6449 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6450 1 << (OP_EXCHANGE_ID - 32) |
6451 1 << (OP_CREATE_SESSION - 32) |
6452 1 << (OP_DESTROY_SESSION - 32) |
6453 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6454 },
6455 .allow.u.words = {
6456 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6457 1 << (OP_LOCKU) |
6458 1 << (OP_COMMIT),
8b5bee2e 6459 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6460 1 << (OP_SECINFO_NO_NAME - 32) |
6461 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6462 1 << (OP_FREE_STATEID - 32) |
6463 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6464 }
6465};
6466
6467/*
6468 * Select the state protection mode for client `clp' given the server results
6469 * from exchange_id in `sp'.
99fe60d0 6470 *
2031cd1a
WAA		 6471 * Returns 0 on success, negative errno otherwise.
6472 */
6473static int nfs4_sp4_select_mode(struct nfs_client *clp,
6474 struct nfs41_state_protection *sp)
6475{
6476 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6477 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6478 1 << (OP_EXCHANGE_ID - 32) |
6479 1 << (OP_CREATE_SESSION - 32) |
6480 1 << (OP_DESTROY_SESSION - 32) |
6481 1 << (OP_DESTROY_CLIENTID - 32)
6482 };
6483 unsigned int i;
6484
6485 if (sp->how == SP4_MACH_CRED) {
6486 /* Print state protect result */
6487 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6488 for (i = 0; i <= LAST_NFS4_OP; i++) {
6489 if (test_bit(i, sp->enforce.u.longs))
6490 dfprintk(MOUNT, " enforce op %d\n", i);
6491 if (test_bit(i, sp->allow.u.longs))
6492 dfprintk(MOUNT, " allow op %d\n", i);
6493 }
6494
6495 /* make sure nothing is on enforce list that isn't supported */
6496 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6497 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6498 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6499 return -EINVAL;
6500 }
6501 }
6502
6503 /*
6504 * Minimal mode - state operations are allowed to use machine
6505 * credential. Note this already happens by default, so the
6506 * client doesn't have to do anything more than the negotiation.
6507 *
6508 * NOTE: we don't care if EXCHANGE_ID is in the list -
6509 * we're already using the machine cred for exchange_id
6510 * and will never use a different cred.
6511 */
6512 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6513 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6514 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6515 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6516 dfprintk(MOUNT, "sp4_mach_cred:\n");
6517 dfprintk(MOUNT, " minimal mode enabled\n");
6518 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6519 } else {
6520 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6521 return -EINVAL;
6522 }
fa940720
WAA		 6523
6524 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6525 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6526 dfprintk(MOUNT, " cleanup mode enabled\n");
6527 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6528 }
8b5bee2e
WAA		 6529
6530 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6531 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6532 dfprintk(MOUNT, " secinfo mode enabled\n");
6533 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6534 }
3787d506
WAA		 6535
6536 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6537 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6538 dfprintk(MOUNT, " stateid mode enabled\n");
6539 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6540 }
8c21c62c
WAA		 6541
6542 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6543 dfprintk(MOUNT, " write mode enabled\n");
6544 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6545 }
6546
6547 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6548 dfprintk(MOUNT, " commit mode enabled\n");
6549 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6550 }
2031cd1a
WAA		 6551 }
6552
6553 return 0;
6554}
6555
6556/*
6557 * _nfs4_proc_exchange_id()
6bbb4ae8 6558 *
2031cd1a 6559 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6560 */
2031cd1a
WAA		 6561static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6562 u32 sp4_how)
99fe60d0
BH		 6563{
6564 nfs4_verifier verifier;
6565 struct nfs41_exchange_id_args args = {
cd93710e 6566 .verifier = &verifier,
99fe60d0 6567 .client = clp,
4f0b429d
TM		 6568 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6569 EXCHGID4_FLAG_BIND_PRINC_STATEID,
99fe60d0
BH		 6570 };
6571 struct nfs41_exchange_id_res res = {
32b01310 6572 0
99fe60d0
BH		 6573 };
6574 int status;
6575 struct rpc_message msg = {
6576 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6577 .rpc_argp = &args,
6578 .rpc_resp = &res,
6579 .rpc_cred = cred,
6580 };
99fe60d0 6581
f092075d 6582 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6583 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6584 sizeof(args.id));
6bbb4ae8
CL		 6585 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6586 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6587 args.id_len, args.id);
99fe60d0 6588
acdeb69d 6589 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6590 GFP_NOFS);
acdeb69d 6591 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6592 status = -ENOMEM;
6593 goto out;
6594 }
78fe0f41 6595
79d4e1f0 6596 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6597 GFP_NOFS);
177313f1 6598 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6599 status = -ENOMEM;
acdeb69d 6600 goto out_server_owner;
abe9a6d5 6601 }
78fe0f41 6602
bbafffd2 6603 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6604 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6605 status = -ENOMEM;
6606 goto out_server_scope;
6607 }
6608
2031cd1a
WAA		 6609 switch (sp4_how) {
6610 case SP4_NONE:
6611 args.state_protect.how = SP4_NONE;
6612 break;
6613
6614 case SP4_MACH_CRED:
6615 args.state_protect = nfs4_sp4_mach_cred_request;
6616 break;
6617
6618 default:
6619 /* unsupported! */
6620 WARN_ON_ONCE(1);
6621 status = -EINVAL;
6622 goto out_server_scope;
6623 }
6624
1bd714f2 6625 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6626 trace_nfs4_exchange_id(clp, status);
177313f1 6627 if (status == 0)
32b01310 6628 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6629
2031cd1a
WAA		 6630 if (status == 0)
6631 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6632
acdeb69d 6633 if (status == 0) {
32b01310
TM		 6634 clp->cl_clientid = res.clientid;
6635 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6636 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6637 clp->cl_seqid = res.seqid;
6638
acdeb69d
CL		 6639 kfree(clp->cl_serverowner);
6640 clp->cl_serverowner = res.server_owner;
6641 res.server_owner = NULL;
78fe0f41 6642
7d2ed9ac 6643 /* use the most recent implementation id */
59155546
CL		 6644 kfree(clp->cl_implid);
6645 clp->cl_implid = res.impl_id;
7d2ed9ac 6646
177313f1 6647 if (clp->cl_serverscope != NULL &&
79d4e1f0 6648 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6649 res.server_scope)) {
6650 dprintk("%s: server_scope mismatch detected\n",
6651 __func__);
6652 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6653 kfree(clp->cl_serverscope);
6654 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6655 }
6656
177313f1 6657 if (clp->cl_serverscope == NULL) {
79d4e1f0 6658 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6659 goto out;
6660 }
32b01310
TM		 6661 } else
6662 kfree(res.impl_id);
7d2ed9ac 6663
acdeb69d
CL		 6664out_server_owner:
6665 kfree(res.server_owner);
7d2ed9ac 6666out_server_scope:
abe9a6d5
WAA		 6667 kfree(res.server_scope);
6668out:
177313f1 6669 if (clp->cl_implid != NULL)
6bbb4ae8 6670 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6671 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6672 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6673 clp->cl_implid->date.seconds,
6674 clp->cl_implid->date.nseconds);
6bbb4ae8 6675 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6676 return status;
6677}
6678
2031cd1a
WAA		 6679/*
6680 * nfs4_proc_exchange_id()
6681 *
6682 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6683 *
6684 * Since the clientid has expired, all compounds using sessions
6685 * associated with the stale clientid will be returning
6686 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6687 * be in some phase of session reset.
6688 *
6689 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6690 */
6691int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6692{
6693 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6694 int status;
6695
6696 /* try SP4_MACH_CRED if krb5i/p */
6697 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6698 authflavor == RPC_AUTH_GSS_KRB5P) {
6699 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6700 if (!status)
6701 return 0;
6702 }
6703
6704 /* try SP4_NONE */
6705 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6706}
6707
66245539
TM		 6708static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6709 struct rpc_cred *cred)
6710{
6711 struct rpc_message msg = {
6712 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6713 .rpc_argp = clp,
6714 .rpc_cred = cred,
6715 };
6716 int status;
6717
6718 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6719 trace_nfs4_destroy_clientid(clp, status);
66245539 6720 if (status)
02c67525 6721 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6722 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6723 return status;
6724}
6725
6726static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6727 struct rpc_cred *cred)
6728{
6729 unsigned int loop;
6730 int ret;
6731
6732 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6733 ret = _nfs4_proc_destroy_clientid(clp, cred);
6734 switch (ret) {
6735 case -NFS4ERR_DELAY:
6736 case -NFS4ERR_CLIENTID_BUSY:
6737 ssleep(1);
6738 break;
6739 default:
6740 return ret;
6741 }
6742 }
6743 return 0;
6744}
6745
6746int nfs4_destroy_clientid(struct nfs_client *clp)
6747{
6748 struct rpc_cred *cred;
6749 int ret = 0;
6750
6751 if (clp->cl_mvops->minor_version < 1)
6752 goto out;
6753 if (clp->cl_exchange_flags == 0)
6754 goto out;
05f4c350
CL		 6755 if (clp->cl_preserve_clid)
6756 goto out;
73d8bde5 6757 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6758 ret = nfs4_proc_destroy_clientid(clp, cred);
6759 if (cred)
6760 put_rpccred(cred);
6761 switch (ret) {
6762 case 0:
6763 case -NFS4ERR_STALE_CLIENTID:
6764 clp->cl_exchange_flags = 0;
6765 }
6766out:
6767 return ret;
6768}
6769
2050f0cc
AA		 6770struct nfs4_get_lease_time_data {
6771 struct nfs4_get_lease_time_args *args;
6772 struct nfs4_get_lease_time_res *res;
6773 struct nfs_client *clp;
6774};
6775
6776static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6777 void *calldata)
6778{
2050f0cc
AA		 6779 struct nfs4_get_lease_time_data *data =
6780 (struct nfs4_get_lease_time_data *)calldata;
6781
6782 dprintk("--> %s\n", __func__);
6783 /* just setup sequence, do not trigger session recovery
6784 since we're invoked within one */
d9afbd1b
TM		 6785 nfs41_setup_sequence(data->clp->cl_session,
6786 &data->args->la_seq_args,
6787 &data->res->lr_seq_res,
6788 task);
2050f0cc
AA		 6789 dprintk("<-- %s\n", __func__);
6790}
6791
6792/*
6793 * Called from nfs4_state_manager thread for session setup, so don't recover
6794 * from sequence operation or clientid errors.
6795 */
6796static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6797{
6798 struct nfs4_get_lease_time_data *data =
6799 (struct nfs4_get_lease_time_data *)calldata;
6800
6801 dprintk("--> %s\n", __func__);
14516c3a
TM		 6802 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6803 return;
2050f0cc
AA		 6804 switch (task->tk_status) {
6805 case -NFS4ERR_DELAY:
6806 case -NFS4ERR_GRACE:
6807 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6808 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6809 task->tk_status = 0;
a8a4ae3a
AA		 6810 /* fall through */
6811 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 6812 rpc_restart_call_prepare(task);
2050f0cc
AA		 6813 return;
6814 }
2050f0cc
AA		 6815 dprintk("<-- %s\n", __func__);
6816}
6817
17280175 6818static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 6819 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6820 .rpc_call_done = nfs4_get_lease_time_done,
6821};
6822
6823int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6824{
6825 struct rpc_task *task;
6826 struct nfs4_get_lease_time_args args;
6827 struct nfs4_get_lease_time_res res = {
6828 .lr_fsinfo = fsinfo,
6829 };
6830 struct nfs4_get_lease_time_data data = {
6831 .args = &args,
6832 .res = &res,
6833 .clp = clp,
6834 };
6835 struct rpc_message msg = {
6836 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6837 .rpc_argp = &args,
6838 .rpc_resp = &res,
6839 };
6840 struct rpc_task_setup task_setup = {
6841 .rpc_client = clp->cl_rpcclient,
6842 .rpc_message = &msg,
6843 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 6844 .callback_data = &data,
6845 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 6846 };
6847 int status;
6848
a9c92d6b 6849 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 6850 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 6851 dprintk("--> %s\n", __func__);
6852 task = rpc_run_task(&task_setup);
6853
6854 if (IS_ERR(task))
6855 status = PTR_ERR(task);
6856 else {
6857 status = task->tk_status;
6858 rpc_put_task(task);
6859 }
6860 dprintk("<-- %s return %d\n", __func__, status);
6861
6862 return status;
6863}
6864
fc931582
AA		 6865/*
6866 * Initialize the values to be used by the client in CREATE_SESSION
6867 * If nfs4_init_session set the fore channel request and response sizes,
6868 * use them.
6869 *
6870 * Set the back channel max_resp_sz_cached to zero to force the client to
6871 * always set csa_cachethis to FALSE because the current implementation
6872 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
6873 */
6874static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
6875{
18aad3d5
AA		 6876 unsigned int max_rqst_sz, max_resp_sz;
6877
6878 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
6879 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 6880
fc931582 6881 /* Fore channel attributes */
18aad3d5
AA		 6882 args->fc_attrs.max_rqst_sz = max_rqst_sz;
6883 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 6884 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 6885 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 6886
6887 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 6888 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 6889 __func__,
6890 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 6891 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 6892
6893 /* Back channel attributes */
fc931582
AA		 6894 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
6895 args->bc_attrs.max_resp_sz = PAGE_SIZE;
6896 args->bc_attrs.max_resp_sz_cached = 0;
6897 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
6898 args->bc_attrs.max_reqs = 1;
6899
6900 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
6901 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
6902 __func__,
6903 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
6904 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
6905 args->bc_attrs.max_reqs);
6906}
6907
43c2e885 6908static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 6909{
43c2e885
BF		 6910 struct nfs4_channel_attrs *sent = &args->fc_attrs;
6911 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
6912
43c2e885
BF		 6913 if (rcvd->max_resp_sz > sent->max_resp_sz)
6914 return -EINVAL;
6915 /*
6916 * Our requested max_ops is the minimum we need; we're not
6917 * prepared to break up compounds into smaller pieces than that.
6918 * So, no point even trying to continue if the server won't
6919 * cooperate:
6920 */
6921 if (rcvd->max_ops < sent->max_ops)
6922 return -EINVAL;
6923 if (rcvd->max_reqs == 0)
6924 return -EINVAL;
b4b9a0c1
VG		 6925 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
6926 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 6927 return 0;
8d35301d
AA		 6928}
6929
43c2e885
BF		 6930static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6931{
6932 struct nfs4_channel_attrs *sent = &args->bc_attrs;
6933 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 6934
43c2e885
BF		 6935 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
6936 return -EINVAL;
6937 if (rcvd->max_resp_sz < sent->max_resp_sz)
6938 return -EINVAL;
6939 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
6940 return -EINVAL;
6941 /* These would render the backchannel useless: */
b4b9a0c1 6942 if (rcvd->max_ops != sent->max_ops)
43c2e885 6943 return -EINVAL;
b4b9a0c1 6944 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 6945 return -EINVAL;
6946 return 0;
6947}
8d35301d 6948
8d35301d
AA		 6949static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
6950 struct nfs4_session *session)
6951{
43c2e885 6952 int ret;
8d35301d 6953
43c2e885
BF		 6954 ret = nfs4_verify_fore_channel_attrs(args, session);
6955 if (ret)
6956 return ret;
6957 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 6958}
6959
848f5bda
TM		 6960static int _nfs4_proc_create_session(struct nfs_client *clp,
6961 struct rpc_cred *cred)
fc931582
AA		 6962{
6963 struct nfs4_session *session = clp->cl_session;
6964 struct nfs41_create_session_args args = {
6965 .client = clp,
6966 .cb_program = NFS4_CALLBACK,
6967 };
6968 struct nfs41_create_session_res res = {
6969 .client = clp,
6970 };
6971 struct rpc_message msg = {
6972 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
6973 .rpc_argp = &args,
6974 .rpc_resp = &res,
848f5bda 6975 .rpc_cred = cred,
fc931582
AA		 6976 };
6977 int status;
6978
6979 nfs4_init_channel_attrs(&args);
0f91421e 6980 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 6981
1bd714f2 6982 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6983 trace_nfs4_create_session(clp, status);
fc931582 6984
43095d39 6985 if (!status) {
8d35301d
AA		 6986 /* Verify the session's negotiated channel_attrs values */
6987 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 6988 /* Increment the clientid slot sequence id */
6989 clp->cl_seqid++;
6990 }
6991
6992 return status;
6993}
6994
6995/*
6996 * Issues a CREATE_SESSION operation to the server.
6997 * It is the responsibility of the caller to verify the session is
6998 * expired before calling this routine.
6999 */
848f5bda 7000int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7001{
7002 int status;
7003 unsigned *ptr;
fc931582
AA		 7004 struct nfs4_session *session = clp->cl_session;
7005
7006 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7007
848f5bda 7008 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7009 if (status)
7010 goto out;
7011
aacd5537
AA		 7012 /* Init or reset the session slot tables */
7013 status = nfs4_setup_session_slot_tables(session);
7014 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7015 if (status)
7016 goto out;
7017
7018 ptr = (unsigned *)&session->sess_id.data[0];
7019 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7020 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7021out:
7022 dprintk("<-- %s\n", __func__);
7023 return status;
7024}
7025
0f3e66c6
AA		 7026/*
7027 * Issue the over-the-wire RPC DESTROY_SESSION.
7028 * The caller must serialize access to this routine.
7029 */
848f5bda
TM		 7030int nfs4_proc_destroy_session(struct nfs4_session *session,
7031 struct rpc_cred *cred)
0f3e66c6 7032{
848f5bda
TM		 7033 struct rpc_message msg = {
7034 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7035 .rpc_argp = session,
7036 .rpc_cred = cred,
7037 };
0f3e66c6 7038 int status = 0;
0f3e66c6
AA		 7039
7040 dprintk("--> nfs4_proc_destroy_session\n");
7041
7042 /* session is still being setup */
7043 if (session->clp->cl_cons_state != NFS_CS_READY)
7044 return status;
7045
1bd714f2 7046 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7047 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7048
7049 if (status)
08106ac7 7050 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7051 "Session has been destroyed regardless...\n", status);
7052
7053 dprintk("<-- nfs4_proc_destroy_session\n");
7054 return status;
7055}
7056
fc01cea9
AA		 7057/*
7058 * Renew the cl_session lease.
7059 */
d5f8d3fe
TM		 7060struct nfs4_sequence_data {
7061 struct nfs_client *clp;
7062 struct nfs4_sequence_args args;
7063 struct nfs4_sequence_res res;
7064};
7065
dc96aef9
AB		 7066static void nfs41_sequence_release(void *data)
7067{
d5f8d3fe
TM		 7068 struct nfs4_sequence_data *calldata = data;
7069 struct nfs_client *clp = calldata->clp;
dc96aef9 7070
7135840f
AB		 7071 if (atomic_read(&clp->cl_count) > 1)
7072 nfs4_schedule_state_renewal(clp);
7073 nfs_put_client(clp);
d5f8d3fe 7074 kfree(calldata);
dc96aef9
AB		 7075}
7076
aa5190d0
TM		 7077static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7078{
7079 switch(task->tk_status) {
7080 case -NFS4ERR_DELAY:
aa5190d0
TM		 7081 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7082 return -EAGAIN;
7083 default:
0400a6b0 7084 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7085 }
7086 return 0;
7087}
7088
dc96aef9 7089static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7090{
d5f8d3fe
TM		 7091 struct nfs4_sequence_data *calldata = data;
7092 struct nfs_client *clp = calldata->clp;
fc01cea9 7093
14516c3a
TM		 7094 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7095 return;
fc01cea9 7096
c6d01c6f 7097 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7098 if (task->tk_status < 0) {
7099 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7100 if (atomic_read(&clp->cl_count) == 1)
7101 goto out;
fc01cea9 7102
aa5190d0
TM		 7103 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7104 rpc_restart_call_prepare(task);
fc01cea9
AA		 7105 return;
7106 }
7107 }
fc01cea9 7108 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7109out:
fc01cea9
AA		 7110 dprintk("<-- %s\n", __func__);
7111}
7112
7113static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7114{
d5f8d3fe
TM		 7115 struct nfs4_sequence_data *calldata = data;
7116 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7117 struct nfs4_sequence_args *args;
7118 struct nfs4_sequence_res *res;
7119
fc01cea9
AA		 7120 args = task->tk_msg.rpc_argp;
7121 res = task->tk_msg.rpc_resp;
7122
d9afbd1b 7123 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7124}
7125
7126static const struct rpc_call_ops nfs41_sequence_ops = {
7127 .rpc_call_done = nfs41_sequence_call_done,
7128 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7129 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7130};
7131
8fe72bac
TM		 7132static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7133 struct rpc_cred *cred,
7134 bool is_privileged)
fc01cea9 7135{
d5f8d3fe 7136 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7137 struct rpc_message msg = {
7138 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7139 .rpc_cred = cred,
7140 };
71ac6da9
TM		 7141 struct rpc_task_setup task_setup_data = {
7142 .rpc_client = clp->cl_rpcclient,
7143 .rpc_message = &msg,
8fe72bac 7144 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7145 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7146 };
fc01cea9 7147
7135840f 7148 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7149 return ERR_PTR(-EIO);
dfb4f309 7150 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7151 if (calldata == NULL) {
7135840f 7152 nfs_put_client(clp);
71ac6da9 7153 return ERR_PTR(-ENOMEM);
fc01cea9 7154 }
a9c92d6b 7155 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7156 if (is_privileged)
7157 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7158 msg.rpc_argp = &calldata->args;
7159 msg.rpc_resp = &calldata->res;
7160 calldata->clp = clp;
71ac6da9 7161 task_setup_data.callback_data = calldata;
fc01cea9 7162
71ac6da9
TM		 7163 return rpc_run_task(&task_setup_data);
7164}
7165
2f60ea6b 7166static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7167{
7168 struct rpc_task *task;
7169 int ret = 0;
7170
2f60ea6b
TM		 7171 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7172 return 0;
8fe72bac 7173 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7174 if (IS_ERR(task))
7175 ret = PTR_ERR(task);
7176 else
bf294b41 7177 rpc_put_task_async(task);
71ac6da9
TM		 7178 dprintk("<-- %s status=%d\n", __func__, ret);
7179 return ret;
7180}
7181
7182static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7183{
7184 struct rpc_task *task;
7185 int ret;
7186
8fe72bac 7187 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7188 if (IS_ERR(task)) {
7189 ret = PTR_ERR(task);
7190 goto out;
7191 }
7192 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7193 if (!ret) {
7194 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7195
7196 if (task->tk_status == 0)
7197 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7198 ret = task->tk_status;
b4410c2f 7199 }
71ac6da9
TM		 7200 rpc_put_task(task);
7201out:
7202 dprintk("<-- %s status=%d\n", __func__, ret);
7203 return ret;
fc01cea9
AA		 7204}
7205
fce5c838
RL		 7206struct nfs4_reclaim_complete_data {
7207 struct nfs_client *clp;
7208 struct nfs41_reclaim_complete_args arg;
7209 struct nfs41_reclaim_complete_res res;
7210};
7211
7212static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7213{
7214 struct nfs4_reclaim_complete_data *calldata = data;
7215
d9afbd1b
TM		 7216 nfs41_setup_sequence(calldata->clp->cl_session,
7217 &calldata->arg.seq_args,
7218 &calldata->res.seq_res,
7219 task);
fce5c838
RL		 7220}
7221
aa5190d0
TM		 7222static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7223{
7224 switch(task->tk_status) {
7225 case 0:
7226 case -NFS4ERR_COMPLETE_ALREADY:
7227 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7228 break;
7229 case -NFS4ERR_DELAY:
aa5190d0 7230 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7231 /* fall through */
7232 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7233 return -EAGAIN;
7234 default:
0400a6b0 7235 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7236 }
7237 return 0;
7238}
7239
fce5c838
RL		 7240static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7241{
7242 struct nfs4_reclaim_complete_data *calldata = data;
7243 struct nfs_client *clp = calldata->clp;
7244 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7245
7246 dprintk("--> %s\n", __func__);
14516c3a
TM		 7247 if (!nfs41_sequence_done(task, res))
7248 return;
fce5c838 7249
c6d01c6f 7250 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7251 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7252 rpc_restart_call_prepare(task);
7253 return;
7254 }
fce5c838
RL		 7255 dprintk("<-- %s\n", __func__);
7256}
7257
7258static void nfs4_free_reclaim_complete_data(void *data)
7259{
7260 struct nfs4_reclaim_complete_data *calldata = data;
7261
7262 kfree(calldata);
7263}
7264
7265static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7266 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7267 .rpc_call_done = nfs4_reclaim_complete_done,
7268 .rpc_release = nfs4_free_reclaim_complete_data,
7269};
7270
7271/*
7272 * Issue a global reclaim complete.
7273 */
965e9c23
TM		 7274static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7275 struct rpc_cred *cred)
fce5c838
RL		 7276{
7277 struct nfs4_reclaim_complete_data *calldata;
7278 struct rpc_task *task;
7279 struct rpc_message msg = {
7280 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7281 .rpc_cred = cred,
fce5c838
RL		 7282 };
7283 struct rpc_task_setup task_setup_data = {
7284 .rpc_client = clp->cl_rpcclient,
7285 .rpc_message = &msg,
7286 .callback_ops = &nfs4_reclaim_complete_call_ops,
7287 .flags = RPC_TASK_ASYNC,
7288 };
7289 int status = -ENOMEM;
7290
7291 dprintk("--> %s\n", __func__);
8535b2be 7292 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7293 if (calldata == NULL)
7294 goto out;
7295 calldata->clp = clp;
7296 calldata->arg.one_fs = 0;
fce5c838 7297
a9c92d6b 7298 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7299 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7300 msg.rpc_argp = &calldata->arg;
7301 msg.rpc_resp = &calldata->res;
7302 task_setup_data.callback_data = calldata;
7303 task = rpc_run_task(&task_setup_data);
acf82b85 7304 if (IS_ERR(task)) {
fce5c838 7305 status = PTR_ERR(task);
acf82b85
DC		 7306 goto out;
7307 }
c34c32ea
AA		 7308 status = nfs4_wait_for_completion_rpc_task(task);
7309 if (status == 0)
7310 status = task->tk_status;
fce5c838 7311 rpc_put_task(task);
acf82b85 7312 return 0;
fce5c838
RL		 7313out:
7314 dprintk("<-- %s status=%d\n", __func__, status);
7315 return status;
7316}
b1f69b75
AA		 7317
7318static void
7319nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7320{
7321 struct nfs4_layoutget *lgp = calldata;
c31663d4 7322 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7323 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7324
7325 dprintk("--> %s\n", __func__);
c31663d4
FI		 7326 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7327 * right now covering the LAYOUTGET we are about to send.
7328 * However, that is not so catastrophic, and there seems
7329 * to be no way to prevent it completely.
7330 */
6ba7db34 7331 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7332 &lgp->res.seq_res, task))
b1f69b75 7333 return;
cf7d63f1
FI		 7334 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7335 NFS_I(lgp->args.inode)->layout,
7336 lgp->args.ctx->state)) {
7337 rpc_exit(task, NFS4_OK);
cf7d63f1 7338 }
b1f69b75
AA		 7339}
7340
7341static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7342{
7343 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7344 struct inode *inode = lgp->args.inode;
7345 struct nfs_server *server = NFS_SERVER(inode);
7346 struct pnfs_layout_hdr *lo;
7347 struct nfs4_state *state = NULL;
30005121 7348 unsigned long timeo, giveup;
b1f69b75
AA		 7349
7350 dprintk("--> %s\n", __func__);
7351
6ba7db34 7352 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7353 goto out;
b1f69b75
AA		 7354
7355 switch (task->tk_status) {
7356 case 0:
ee314c2a 7357 goto out;
b1f69b75
AA		 7358 case -NFS4ERR_LAYOUTTRYLATER:
7359 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7360 timeo = rpc_get_timeout(task->tk_client);
7361 giveup = lgp->args.timestamp + timeo;
7362 if (time_after(giveup, jiffies))
7363 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 7364 break;
7365 case -NFS4ERR_EXPIRED:
7366 case -NFS4ERR_BAD_STATEID:
7367 spin_lock(&inode->i_lock);
7368 lo = NFS_I(inode)->layout;
7369 if (!lo || list_empty(&lo->plh_segs)) {
7370 spin_unlock(&inode->i_lock);
7371 /* If the open stateid was bad, then recover it. */
7372 state = lgp->args.ctx->state;
7373 } else {
7374 LIST_HEAD(head);
7375
7376 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7377 spin_unlock(&inode->i_lock);
7378 /* Mark the bad layout state as invalid, then
7379 * retry using the open stateid. */
7380 pnfs_free_lseg_list(&head);
b1f69b75
AA		 7381 }
7382 }
ee314c2a
TM		 7383 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
7384 rpc_restart_call_prepare(task);
7385out:
b1f69b75
AA		 7386 dprintk("<-- %s\n", __func__);
7387}
7388
8554116e
IK		 7389static size_t max_response_pages(struct nfs_server *server)
7390{
7391 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7392 return nfs_page_array_len(0, max_resp_sz);
7393}
7394
7395static void nfs4_free_pages(struct page **pages, size_t size)
7396{
7397 int i;
7398
7399 if (!pages)
7400 return;
7401
7402 for (i = 0; i < size; i++) {
7403 if (!pages[i])
7404 break;
7405 __free_page(pages[i]);
7406 }
7407 kfree(pages);
7408}
7409
7410static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7411{
7412 struct page **pages;
7413 int i;
7414
7415 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7416 if (!pages) {
7417 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7418 return NULL;
7419 }
7420
7421 for (i = 0; i < size; i++) {
7422 pages[i] = alloc_page(gfp_flags);
7423 if (!pages[i]) {
7424 dprintk("%s: failed to allocate page\n", __func__);
7425 nfs4_free_pages(pages, size);
7426 return NULL;
7427 }
7428 }
7429
7430 return pages;
7431}
7432
b1f69b75
AA		 7433static void nfs4_layoutget_release(void *calldata)
7434{
7435 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7436 struct inode *inode = lgp->args.inode;
7437 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7438 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7439
7440 dprintk("--> %s\n", __func__);
8554116e 7441 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7442 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7443 put_nfs_open_context(lgp->args.ctx);
7444 kfree(calldata);
7445 dprintk("<-- %s\n", __func__);
7446}
7447
7448static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7449 .rpc_call_prepare = nfs4_layoutget_prepare,
7450 .rpc_call_done = nfs4_layoutget_done,
7451 .rpc_release = nfs4_layoutget_release,
7452};
7453
a0b0a6e3
TM		 7454struct pnfs_layout_segment *
7455nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7456{
a47970ff
WAA		 7457 struct inode *inode = lgp->args.inode;
7458 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7459 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7460 struct rpc_task *task;
7461 struct rpc_message msg = {
7462 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7463 .rpc_argp = &lgp->args,
7464 .rpc_resp = &lgp->res,
6ab59344 7465 .rpc_cred = lgp->cred,
b1f69b75
AA		 7466 };
7467 struct rpc_task_setup task_setup_data = {
7468 .rpc_client = server->client,
7469 .rpc_message = &msg,
7470 .callback_ops = &nfs4_layoutget_call_ops,
7471 .callback_data = lgp,
7472 .flags = RPC_TASK_ASYNC,
7473 };
a0b0a6e3 7474 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7475 int status = 0;
7476
7477 dprintk("--> %s\n", __func__);
7478
8554116e
IK		 7479 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7480 if (!lgp->args.layout.pages) {
7481 nfs4_layoutget_release(lgp);
a0b0a6e3 7482 return ERR_PTR(-ENOMEM);
8554116e
IK		 7483 }
7484 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7485 lgp->args.timestamp = jiffies;
8554116e 7486
35124a09 7487 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7488 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7489 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 7490
7491 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7492 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7493
b1f69b75
AA		 7494 task = rpc_run_task(&task_setup_data);
7495 if (IS_ERR(task))
a0b0a6e3 7496 return ERR_CAST(task);
b1f69b75 7497 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7498 if (status == 0)
7499 status = task->tk_status;
1037e6ea
TM		 7500 trace_nfs4_layoutget(lgp->args.ctx,
7501 &lgp->args.range,
7502 &lgp->res.range,
7503 status);
085b7a45
WAA		 7504 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7505 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7506 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7507 rpc_put_task(task);
7508 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7509 if (status)
7510 return ERR_PTR(status);
7511 return lseg;
b1f69b75
AA		 7512}
7513
cbe82603
BH		 7514static void
7515nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7516{
7517 struct nfs4_layoutreturn *lrp = calldata;
7518
7519 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7520 nfs41_setup_sequence(lrp->clp->cl_session,
7521 &lrp->args.seq_args,
7522 &lrp->res.seq_res,
7523 task);
cbe82603
BH		 7524}
7525
7526static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7527{
7528 struct nfs4_layoutreturn *lrp = calldata;
7529 struct nfs_server *server;
7530
7531 dprintk("--> %s\n", __func__);
7532
6ba7db34 7533 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7534 return;
7535
7536 server = NFS_SERVER(lrp->args.inode);
7537 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 7538 rpc_restart_call_prepare(task);
cbe82603
BH		 7539 return;
7540 }
cbe82603
BH		 7541 dprintk("<-- %s\n", __func__);
7542}
7543
7544static void nfs4_layoutreturn_release(void *calldata)
7545{
7546 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7547 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7548
7549 dprintk("--> %s\n", __func__);
849b286f
TM		 7550 spin_lock(&lo->plh_inode->i_lock);
7551 if (lrp->res.lrs_present)
7552 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7553 lo->plh_block_lgets--;
7554 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7555 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 7556 kfree(calldata);
7557 dprintk("<-- %s\n", __func__);
7558}
7559
7560static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7561 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7562 .rpc_call_done = nfs4_layoutreturn_done,
7563 .rpc_release = nfs4_layoutreturn_release,
7564};
7565
7566int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7567{
7568 struct rpc_task *task;
7569 struct rpc_message msg = {
7570 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7571 .rpc_argp = &lrp->args,
7572 .rpc_resp = &lrp->res,
9556000d 7573 .rpc_cred = lrp->cred,
cbe82603
BH		 7574 };
7575 struct rpc_task_setup task_setup_data = {
1771c577 7576 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7577 .rpc_message = &msg,
7578 .callback_ops = &nfs4_layoutreturn_call_ops,
7579 .callback_data = lrp,
7580 };
7581 int status;
7582
7583 dprintk("--> %s\n", __func__);
a9c92d6b 7584 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7585 task = rpc_run_task(&task_setup_data);
7586 if (IS_ERR(task))
7587 return PTR_ERR(task);
7588 status = task->tk_status;
1037e6ea 7589 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7590 dprintk("<-- %s status=%d\n", __func__, status);
7591 rpc_put_task(task);
7592 return status;
7593}
7594
7f11d8d3
AA		 7595/*
7596 * Retrieve the list of Data Server devices from the MDS.
7597 */
7598static int _nfs4_getdevicelist(struct nfs_server *server,
7599 const struct nfs_fh *fh,
7600 struct pnfs_devicelist *devlist)
7601{
7602 struct nfs4_getdevicelist_args args = {
7603 .fh = fh,
7604 .layoutclass = server->pnfs_curr_ld->id,
7605 };
7606 struct nfs4_getdevicelist_res res = {
7607 .devlist = devlist,
7608 };
7609 struct rpc_message msg = {
7610 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
7611 .rpc_argp = &args,
7612 .rpc_resp = &res,
7613 };
7614 int status;
7615
7616 dprintk("--> %s\n", __func__);
7617 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
7618 &res.seq_res, 0);
7619 dprintk("<-- %s status=%d\n", __func__, status);
7620 return status;
7621}
7622
7623int nfs4_proc_getdevicelist(struct nfs_server *server,
7624 const struct nfs_fh *fh,
7625 struct pnfs_devicelist *devlist)
7626{
7627 struct nfs4_exception exception = { };
7628 int err;
7629
7630 do {
7631 err = nfs4_handle_exception(server,
7632 _nfs4_getdevicelist(server, fh, devlist),
7633 &exception);
7634 } while (exception.retry);
7635
7636 dprintk("%s: err=%d, num_devs=%u\n", __func__,
7637 err, devlist->num_devs);
7638
7639 return err;
7640}
7641EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
7642
b1f69b75 7643static int
cd5875fe
TM		 7644_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7645 struct pnfs_device *pdev,
7646 struct rpc_cred *cred)
b1f69b75
AA		 7647{
7648 struct nfs4_getdeviceinfo_args args = {
7649 .pdev = pdev,
7650 };
7651 struct nfs4_getdeviceinfo_res res = {
7652 .pdev = pdev,
7653 };
7654 struct rpc_message msg = {
7655 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7656 .rpc_argp = &args,
7657 .rpc_resp = &res,
cd5875fe 7658 .rpc_cred = cred,
b1f69b75
AA		 7659 };
7660 int status;
7661
7662 dprintk("--> %s\n", __func__);
7c513058 7663 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7664 dprintk("<-- %s status=%d\n", __func__, status);
7665
7666 return status;
7667}
7668
cd5875fe
TM		 7669int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7670 struct pnfs_device *pdev,
7671 struct rpc_cred *cred)
b1f69b75
AA		 7672{
7673 struct nfs4_exception exception = { };
7674 int err;
7675
7676 do {
7677 err = nfs4_handle_exception(server,
cd5875fe 7678 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7679 &exception);
7680 } while (exception.retry);
7681 return err;
7682}
7683EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7684
863a3c6c
AA		 7685static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7686{
7687 struct nfs4_layoutcommit_data *data = calldata;
7688 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7689 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7690
d9afbd1b
TM		 7691 nfs41_setup_sequence(session,
7692 &data->args.seq_args,
7693 &data->res.seq_res,
7694 task);
863a3c6c
AA		 7695}
7696
7697static void
7698nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7699{
7700 struct nfs4_layoutcommit_data *data = calldata;
7701 struct nfs_server *server = NFS_SERVER(data->args.inode);
7702
6ba7db34 7703 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7704 return;
7705
7706 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7707 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7708 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7709 case -NFS4ERR_BADLAYOUT: /* no layout */
7710 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7711 task->tk_status = 0;
e59d27e0
TM		 7712 break;
7713 case 0:
863a3c6c
AA		 7714 nfs_post_op_update_inode_force_wcc(data->args.inode,
7715 data->res.fattr);
e59d27e0
TM		 7716 break;
7717 default:
7718 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7719 rpc_restart_call_prepare(task);
7720 return;
7721 }
7722 }
863a3c6c
AA		 7723}
7724
7725static void nfs4_layoutcommit_release(void *calldata)
7726{
7727 struct nfs4_layoutcommit_data *data = calldata;
7728
db29c089 7729 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 7730 put_rpccred(data->cred);
7731 kfree(data);
7732}
7733
7734static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7735 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7736 .rpc_call_done = nfs4_layoutcommit_done,
7737 .rpc_release = nfs4_layoutcommit_release,
7738};
7739
7740int
ef311537 7741nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7742{
7743 struct rpc_message msg = {
7744 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7745 .rpc_argp = &data->args,
7746 .rpc_resp = &data->res,
7747 .rpc_cred = data->cred,
7748 };
7749 struct rpc_task_setup task_setup_data = {
7750 .task = &data->task,
7751 .rpc_client = NFS_CLIENT(data->args.inode),
7752 .rpc_message = &msg,
7753 .callback_ops = &nfs4_layoutcommit_ops,
7754 .callback_data = data,
7755 .flags = RPC_TASK_ASYNC,
7756 };
7757 struct rpc_task *task;
7758 int status = 0;
7759
7760 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7761 "lbw: %llu inode %lu\n",
7762 data->task.tk_pid, sync,
7763 data->args.lastbytewritten,
7764 data->args.inode->i_ino);
7765
a9c92d6b 7766 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7767 task = rpc_run_task(&task_setup_data);
7768 if (IS_ERR(task))
7769 return PTR_ERR(task);
ef311537 7770 if (sync == false)
863a3c6c
AA		 7771 goto out;
7772 status = nfs4_wait_for_completion_rpc_task(task);
7773 if (status != 0)
7774 goto out;
7775 status = task->tk_status;
1037e6ea 7776 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7777out:
7778 dprintk("%s: status %d\n", __func__, status);
7779 rpc_put_task(task);
7780 return status;
7781}
fca78d6d 7782
97431204
AA		 7783/**
7784 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7785 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7786 */
fca78d6d
BS		 7787static int
7788_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 7789 struct nfs_fsinfo *info,
7790 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 7791{
7792 struct nfs41_secinfo_no_name_args args = {
7793 .style = SECINFO_STYLE_CURRENT_FH,
7794 };
7795 struct nfs4_secinfo_res res = {
7796 .flavors = flavors,
7797 };
7798 struct rpc_message msg = {
7799 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7800 .rpc_argp = &args,
7801 .rpc_resp = &res,
7802 };
b1b3e136 7803 struct rpc_clnt *clnt = server->client;
7cb852df 7804 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 7805 int status;
7806
7807 if (use_integrity) {
7808 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 7809 cred = nfs4_get_clid_cred(server->nfs_client);
7810 msg.rpc_cred = cred;
b1b3e136
WAA		 7811 }
7812
7813 dprintk("--> %s\n", __func__);
7814 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
7815 &res.seq_res, 0);
7816 dprintk("<-- %s status=%d\n", __func__, status);
7817
7cb852df
WAA		 7818 if (cred)
7819 put_rpccred(cred);
b1b3e136
WAA		 7820
7821 return status;
fca78d6d
BS		 7822}
7823
7824static int
7825nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7826 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7827{
7828 struct nfs4_exception exception = { };
7829 int err;
7830 do {
b1b3e136
WAA		 7831 /* first try using integrity protection */
7832 err = -NFS4ERR_WRONGSEC;
7833
7834 /* try to use integrity protection with machine cred */
7835 if (_nfs4_is_integrity_protected(server->nfs_client))
7836 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7837 flavors, true);
7838
7839 /*
7840 * if unable to use integrity protection, or SECINFO with
7841 * integrity protection returns NFS4ERR_WRONGSEC (which is
7842 * disallowed by spec, but exists in deployed servers) use
7843 * the current filesystem's rpc_client and the user cred.
7844 */
7845 if (err == -NFS4ERR_WRONGSEC)
7846 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7847 flavors, false);
7848
fca78d6d
BS		 7849 switch (err) {
7850 case 0:
7851 case -NFS4ERR_WRONGSEC:
7852 case -NFS4ERR_NOTSUPP:
05e9cfb4 7853 goto out;
fca78d6d
BS		 7854 default:
7855 err = nfs4_handle_exception(server, err, &exception);
7856 }
7857 } while (exception.retry);
05e9cfb4 7858out:
fca78d6d
BS		 7859 return err;
7860}
7861
7862static int
7863nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
7864 struct nfs_fsinfo *info)
7865{
7866 int err;
7867 struct page *page;
367156d9 7868 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 7869 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 7870 struct nfs4_secinfo4 *secinfo;
7871 int i;
fca78d6d
BS		 7872
7873 page = alloc_page(GFP_KERNEL);
7874 if (!page) {
7875 err = -ENOMEM;
7876 goto out;
7877 }
7878
7879 flavors = page_address(page);
7880 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7881
7882 /*
7883 * Fall back on "guess and check" method if
7884 * the server doesn't support SECINFO_NO_NAME
7885 */
7886 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
7887 err = nfs4_find_root_sec(server, fhandle, info);
7888 goto out_freepage;
7889 }
7890 if (err)
7891 goto out_freepage;
7892
58a8cf12
WAA		 7893 for (i = 0; i < flavors->num_flavors; i++) {
7894 secinfo = &flavors->flavors[i];
7895
7896 switch (secinfo->flavor) {
7897 case RPC_AUTH_NULL:
7898 case RPC_AUTH_UNIX:
7899 case RPC_AUTH_GSS:
7900 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
7901 &secinfo->flavor_info);
7902 break;
7903 default:
7904 flavor = RPC_AUTH_MAXFLAVOR;
7905 break;
7906 }
7907
7908 if (flavor != RPC_AUTH_MAXFLAVOR) {
7909 err = nfs4_lookup_root_sec(server, fhandle,
7910 info, flavor);
7911 if (!err)
7912 break;
7913 }
7914 }
7915
7916 if (flavor == RPC_AUTH_MAXFLAVOR)
7917 err = -EPERM;
fca78d6d
BS		 7918
7919out_freepage:
7920 put_page(page);
7921 if (err == -EACCES)
7922 return -EPERM;
7923out:
7924 return err;
7925}
1cab0652 7926
ab7cb0df
TM		 7927static int _nfs41_test_stateid(struct nfs_server *server,
7928 nfs4_stateid *stateid,
7929 struct rpc_cred *cred)
7d974794
BS		 7930{
7931 int status;
7932 struct nfs41_test_stateid_args args = {
1cab0652 7933 .stateid = stateid,
7d974794
BS		 7934 };
7935 struct nfs41_test_stateid_res res;
7936 struct rpc_message msg = {
7937 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
7938 .rpc_argp = &args,
7939 .rpc_resp = &res,
ab7cb0df 7940 .rpc_cred = cred,
7d974794 7941 };
3787d506
WAA		 7942 struct rpc_clnt *rpc_client = server->client;
7943
7944 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
7945 &rpc_client, &msg);
1cab0652 7946
38527b15 7947 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 7948 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 7949 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 7950 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 7951 &args.seq_args, &res.seq_res);
38527b15
CL		 7952 if (status != NFS_OK) {
7953 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 7954 return status;
38527b15
CL		 7955 }
7956 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 7957 return -res.status;
7d974794
BS		 7958}
7959
38527b15
CL		 7960/**
7961 * nfs41_test_stateid - perform a TEST_STATEID operation
7962 *
7963 * @server: server / transport on which to perform the operation
7964 * @stateid: state ID to test
ab7cb0df 7965 * @cred: credential
38527b15
CL		 7966 *
7967 * Returns NFS_OK if the server recognizes that "stateid" is valid.
7968 * Otherwise a negative NFS4ERR value is returned if the operation
7969 * failed or the state ID is not currently valid.
7970 */
ab7cb0df
TM		 7971static int nfs41_test_stateid(struct nfs_server *server,
7972 nfs4_stateid *stateid,
7973 struct rpc_cred *cred)
7d974794
BS		 7974{
7975 struct nfs4_exception exception = { };
7976 int err;
7977 do {
ab7cb0df 7978 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 7979 if (err != -NFS4ERR_DELAY)
7980 break;
7981 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 7982 } while (exception.retry);
7983 return err;
7984}
9aeda35f 7985
7c1d5fae
TM		 7986struct nfs_free_stateid_data {
7987 struct nfs_server *server;
7988 struct nfs41_free_stateid_args args;
9aeda35f 7989 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 7990};
7991
7992static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
7993{
7994 struct nfs_free_stateid_data *data = calldata;
7995 nfs41_setup_sequence(nfs4_get_session(data->server),
7996 &data->args.seq_args,
7997 &data->res.seq_res,
7998 task);
7999}
8000
8001static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8002{
8003 struct nfs_free_stateid_data *data = calldata;
8004
8005 nfs41_sequence_done(task, &data->res.seq_res);
8006
8007 switch (task->tk_status) {
8008 case -NFS4ERR_DELAY:
8009 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
8010 rpc_restart_call_prepare(task);
8011 }
8012}
8013
8014static void nfs41_free_stateid_release(void *calldata)
8015{
8016 kfree(calldata);
8017}
8018
17f26b12 8019static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8020 .rpc_call_prepare = nfs41_free_stateid_prepare,
8021 .rpc_call_done = nfs41_free_stateid_done,
8022 .rpc_release = nfs41_free_stateid_release,
8023};
8024
8025static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8026 nfs4_stateid *stateid,
ab7cb0df 8027 struct rpc_cred *cred,
7c1d5fae
TM		 8028 bool privileged)
8029{
9aeda35f
BS		 8030 struct rpc_message msg = {
8031 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8032 .rpc_cred = cred,
9aeda35f 8033 };
7c1d5fae
TM		 8034 struct rpc_task_setup task_setup = {
8035 .rpc_client = server->client,
8036 .rpc_message = &msg,
8037 .callback_ops = &nfs41_free_stateid_ops,
8038 .flags = RPC_TASK_ASYNC,
8039 };
8040 struct nfs_free_stateid_data *data;
9aeda35f 8041
3787d506
WAA		 8042 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8043 &task_setup.rpc_client, &msg);
8044
38527b15 8045 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8046 data = kmalloc(sizeof(*data), GFP_NOFS);
8047 if (!data)
8048 return ERR_PTR(-ENOMEM);
8049 data->server = server;
8050 nfs4_stateid_copy(&data->args.stateid, stateid);
8051
8052 task_setup.callback_data = data;
8053
8054 msg.rpc_argp = &data->args;
8055 msg.rpc_resp = &data->res;
a9c92d6b 8056 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8057 if (privileged)
8058 nfs4_set_sequence_privileged(&data->args.seq_args);
8059
8060 return rpc_run_task(&task_setup);
9aeda35f
BS		 8061}
8062
38527b15
CL		 8063/**
8064 * nfs41_free_stateid - perform a FREE_STATEID operation
8065 *
8066 * @server: server / transport on which to perform the operation
8067 * @stateid: state ID to release
ab7cb0df 8068 * @cred: credential
38527b15
CL		 8069 *
8070 * Returns NFS_OK if the server freed "stateid". Otherwise a
8071 * negative NFS4ERR value is returned.
8072 */
ab7cb0df
TM		 8073static int nfs41_free_stateid(struct nfs_server *server,
8074 nfs4_stateid *stateid,
8075 struct rpc_cred *cred)
9aeda35f 8076{
7c1d5fae
TM		 8077 struct rpc_task *task;
8078 int ret;
8079
ab7cb0df 8080 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8081 if (IS_ERR(task))
8082 return PTR_ERR(task);
8083 ret = rpc_wait_for_completion_task(task);
8084 if (!ret)
8085 ret = task->tk_status;
8086 rpc_put_task(task);
8087 return ret;
9aeda35f 8088}
36281caa 8089
c8b2d0bf
TM		 8090static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
8091{
8092 struct rpc_task *task;
ab7cb0df 8093 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8094
ab7cb0df 8095 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8096 nfs4_free_lock_state(server, lsp);
8097 if (IS_ERR(task))
8098 return PTR_ERR(task);
8099 rpc_put_task(task);
8100 return 0;
8101}
8102
36281caa
TM		 8103static bool nfs41_match_stateid(const nfs4_stateid *s1,
8104 const nfs4_stateid *s2)
8105{
2d2f24ad 8106 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8107 return false;
8108
2d2f24ad 8109 if (s1->seqid == s2->seqid)
36281caa 8110 return true;
2d2f24ad 8111 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8112 return true;
8113
8114 return false;
8115}
8116
557134a3
AA		 8117#endif /* CONFIG_NFS_V4_1 */
8118
36281caa
TM		 8119static bool nfs4_match_stateid(const nfs4_stateid *s1,
8120 const nfs4_stateid *s2)
8121{
f597c537 8122 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8123}
8124
8125
17280175 8126static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8127 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8128 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8129 .recover_open = nfs4_open_reclaim,
8130 .recover_lock = nfs4_lock_reclaim,
591d71cb 8131 .establish_clid = nfs4_init_clientid,
05f4c350 8132 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8133};
8134
591d71cb 8135#if defined(CONFIG_NFS_V4_1)
17280175 8136static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8137 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8138 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8139 .recover_open = nfs4_open_reclaim,
8140 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8141 .establish_clid = nfs41_init_clientid,
fce5c838 8142 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8143 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8144};
8145#endif /* CONFIG_NFS_V4_1 */
8146
17280175 8147static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8148 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8149 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8150 .recover_open = nfs4_open_expired,
8151 .recover_lock = nfs4_lock_expired,
8152 .establish_clid = nfs4_init_clientid,
8153};
8154
8155#if defined(CONFIG_NFS_V4_1)
17280175 8156static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8157 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8158 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8159 .recover_open = nfs41_open_expired,
8160 .recover_lock = nfs41_lock_expired,
4d643d1d 8161 .establish_clid = nfs41_init_clientid,
1da177e4 8162};
591d71cb 8163#endif /* CONFIG_NFS_V4_1 */
1da177e4 8164
17280175 8165static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8166 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8167 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8168 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8169};
8170
8171#if defined(CONFIG_NFS_V4_1)
17280175 8172static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8173 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8174 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8175 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8176};
8177#endif
8178
ec011fe8 8179static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8180 .get_locations = _nfs40_proc_get_locations,
44c99933 8181 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8182};
8183
8184#if defined(CONFIG_NFS_V4_1)
8185static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8186 .get_locations = _nfs41_proc_get_locations,
44c99933 8187 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8188};
8189#endif /* CONFIG_NFS_V4_1 */
8190
97dc1359
TM		 8191static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8192 .minor_version = 0,
39c6daae
TM		 8193 .init_caps = NFS_CAP_READDIRPLUS
8194 | NFS_CAP_ATOMIC_OPEN
8195 | NFS_CAP_CHANGE_ATTR
8196 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8197 .init_client = nfs40_init_client,
8198 .shutdown_client = nfs40_shutdown_client,
36281caa 8199 .match_stateid = nfs4_match_stateid,
fca78d6d 8200 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8201 .free_lock_state = nfs4_release_lockowner,
9915ea7e 8202 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8203 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8204 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8205 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8206 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8207};
8208
8209#if defined(CONFIG_NFS_V4_1)
8210static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8211 .minor_version = 1,
39c6daae
TM		 8212 .init_caps = NFS_CAP_READDIRPLUS
8213 | NFS_CAP_ATOMIC_OPEN
8214 | NFS_CAP_CHANGE_ATTR
3b66486c 8215 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 8216 | NFS_CAP_STATEID_NFSV41
8217 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8218 .init_client = nfs41_init_client,
8219 .shutdown_client = nfs41_shutdown_client,
36281caa 8220 .match_stateid = nfs41_match_stateid,
fca78d6d 8221 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8222 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8223 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8224 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8225 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8226 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8227 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8228};
8229#endif
8230
42c2c424
SD		 8231#if defined(CONFIG_NFS_V4_2)
8232static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8233 .minor_version = 2,
7017310a
BS		 8234 .init_caps = NFS_CAP_READDIRPLUS
8235 | NFS_CAP_ATOMIC_OPEN
8236 | NFS_CAP_CHANGE_ATTR
8237 | NFS_CAP_POSIX_LOCK
8238 | NFS_CAP_STATEID_NFSV41
8239 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8240 .init_client = nfs41_init_client,
8241 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8242 .match_stateid = nfs41_match_stateid,
8243 .find_root_sec = nfs41_find_root_sec,
7017310a 8244 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8245 .call_sync_ops = &nfs41_call_sync_ops,
42c2c424
SD		 8246 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8247 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8248 .state_renewal_ops = &nfs41_state_renewal_ops,
8249};
8250#endif
8251
97dc1359
TM		 8252const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8253 [0] = &nfs_v4_0_minor_ops,
8254#if defined(CONFIG_NFS_V4_1)
8255 [1] = &nfs_v4_1_minor_ops,
8256#endif
42c2c424
SD		 8257#if defined(CONFIG_NFS_V4_2)
8258 [2] = &nfs_v4_2_minor_ops,
8259#endif
97dc1359
TM		 8260};
8261
17f26b12 8262static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8263 .create = nfs_create,
8264 .lookup = nfs_lookup,
8265 .atomic_open = nfs_atomic_open,
8266 .link = nfs_link,
8267 .unlink = nfs_unlink,
8268 .symlink = nfs_symlink,
8269 .mkdir = nfs_mkdir,
8270 .rmdir = nfs_rmdir,
8271 .mknod = nfs_mknod,
8272 .rename = nfs_rename,
8273 .permission = nfs_permission,
8274 .getattr = nfs_getattr,
8275 .setattr = nfs_setattr,
8276 .getxattr = generic_getxattr,
8277 .setxattr = generic_setxattr,
8278 .listxattr = generic_listxattr,
8279 .removexattr = generic_removexattr,
8280};
8281
92e1d5be 8282static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8283 .permission = nfs_permission,
8284 .getattr = nfs_getattr,
8285 .setattr = nfs_setattr,
64c2ce8b
AK		 8286 .getxattr = generic_getxattr,
8287 .setxattr = generic_setxattr,
8288 .listxattr = generic_listxattr,
8289 .removexattr = generic_removexattr,
6b3b5496
BF		 8290};
8291
509de811 8292const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8293 .version = 4, /* protocol version */
8294 .dentry_ops = &nfs4_dentry_operations,
8295 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8296 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8297 .file_ops = &nfs4_file_operations,
1da177e4 8298 .getroot = nfs4_proc_get_root,
281cad46 8299 .submount = nfs4_submount,
ff9099f2 8300 .try_mount = nfs4_try_mount,
1da177e4
LT		 8301 .getattr = nfs4_proc_getattr,
8302 .setattr = nfs4_proc_setattr,
8303 .lookup = nfs4_proc_lookup,
8304 .access = nfs4_proc_access,
8305 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8306 .create = nfs4_proc_create,
8307 .remove = nfs4_proc_remove,
8308 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8309 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 8310 .unlink_done = nfs4_proc_unlink_done,
8311 .rename = nfs4_proc_rename,
d3d4152a 8312 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8313 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8314 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8315 .link = nfs4_proc_link,
8316 .symlink = nfs4_proc_symlink,
8317 .mkdir = nfs4_proc_mkdir,
8318 .rmdir = nfs4_proc_remove,
8319 .readdir = nfs4_proc_readdir,
8320 .mknod = nfs4_proc_mknod,
8321 .statfs = nfs4_proc_statfs,
8322 .fsinfo = nfs4_proc_fsinfo,
8323 .pathconf = nfs4_proc_pathconf,
e9326dca 8324 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 8325 .decode_dirent = nfs4_decode_dirent,
8326 .read_setup = nfs4_proc_read_setup,
1abb5088 8327 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 8328 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 8329 .read_done = nfs4_read_done,
1da177e4 8330 .write_setup = nfs4_proc_write_setup,
57208fa7 8331 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 8332 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 8333 .write_done = nfs4_write_done,
1da177e4 8334 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8335 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8336 .commit_done = nfs4_commit_done,
1da177e4 8337 .lock = nfs4_proc_lock,
e50a1c2e 8338 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8339 .close_context = nfs4_close_context,
2b484297 8340 .open_context = nfs4_atomic_open,
011e2a7f 8341 .have_delegation = nfs4_have_delegation,
57ec14c5 8342 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8343 .alloc_client = nfs4_alloc_client,
45a52a02 8344 .init_client = nfs4_init_client,
cdb7eced 8345 .free_client = nfs4_free_client,
1179acc6
BS		 8346 .create_server = nfs4_create_server,
8347 .clone_server = nfs_clone_server,
1da177e4
LT		 8348};
8349
64c2ce8b
AK		 8350static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8351 .prefix = XATTR_NAME_NFSV4_ACL,
8352 .list = nfs4_xattr_list_nfs4_acl,
8353 .get = nfs4_xattr_get_nfs4_acl,
8354 .set = nfs4_xattr_set_nfs4_acl,
8355};
8356
8357const struct xattr_handler *nfs4_xattr_handlers[] = {
8358 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8359#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8360 &nfs4_xattr_nfs4_label_handler,
8361#endif
64c2ce8b
AK		 8362 NULL
8363};
8364
1da177e4
LT		 8365/*
8366 * Local variables:
8367 * c-basic-offset: 8
8368 * End:
8369 */
Linux 6.x block layer and io_uring tree(s)