projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Linux 3.12-rc2
[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;
03391693 387#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 388 case -NFS4ERR_BADSESSION:
389 case -NFS4ERR_BADSLOT:
390 case -NFS4ERR_BAD_HIGH_SLOT:
391 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
392 case -NFS4ERR_DEADSESSION:
393 case -NFS4ERR_SEQ_FALSE_RETRY:
394 case -NFS4ERR_SEQ_MISORDERED:
395 dprintk("%s ERROR: %d Reset session\n", __func__,
396 errorcode);
9f594791 397 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 398 goto wait_on_recovery;
03391693 399#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 400 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 401 if (exception->timeout > HZ) {
402 /* We have retried a decent amount, time to
403 * fail
404 */
405 ret = -EBUSY;
406 break;
407 }
65de872e
TM		 408 case -NFS4ERR_GRACE:
409 case -NFS4ERR_DELAY:
410 ret = nfs4_delay(server->client, &exception->timeout);
411 if (ret != 0)
412 break;
a8a4ae3a 413 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 414 case -NFS4ERR_OLD_STATEID:
415 exception->retry = 1;
b064eca2
TM		 416 break;
417 case -NFS4ERR_BADOWNER:
418 /* The following works around a Linux server bug! */
419 case -NFS4ERR_BADNAME:
420 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
421 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
422 exception->retry = 1;
423 printk(KERN_WARNING "NFS: v4 server %s "
424 "does not accept raw "
425 "uid/gids. "
426 "Reenabling the idmapper.\n",
427 server->nfs_client->cl_hostname);
428 }
65de872e
TM		 429 }
430 /* We failed to handle the error */
431 return nfs4_map_errors(ret);
0400a6b0 432wait_on_recovery:
a2c0b9e2
TM		 433 ret = nfs4_wait_clnt_recover(clp);
434 if (ret == 0)
435 exception->retry = 1;
436 return ret;
65de872e
TM		 437}
438
a5250def
WAA		 439/*
440 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
441 * or 'false' otherwise.
442 */
443static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
444{
445 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
446
447 if (flavor == RPC_AUTH_GSS_KRB5I ||
448 flavor == RPC_AUTH_GSS_KRB5P)
449 return true;
450
451 return false;
452}
65de872e 453
452e9352 454static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 455{
1da177e4
LT		 456 spin_lock(&clp->cl_lock);
457 if (time_before(clp->cl_last_renewal,timestamp))
458 clp->cl_last_renewal = timestamp;
459 spin_unlock(&clp->cl_lock);
460}
461
452e9352
TM		 462static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
463{
464 do_renew_lease(server->nfs_client, timestamp);
465}
466
2a3eb2b9
CL		 467struct nfs4_call_sync_data {
468 const struct nfs_server *seq_server;
469 struct nfs4_sequence_args *seq_args;
470 struct nfs4_sequence_res *seq_res;
471};
472
a9c92d6b
CL		 473static void nfs4_init_sequence(struct nfs4_sequence_args *args,
474 struct nfs4_sequence_res *res, int cache_reply)
475{
476 args->sa_slot = NULL;
477 args->sa_cache_this = cache_reply;
478 args->sa_privileged = 0;
479
480 res->sr_slot = NULL;
481}
482
483static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
484{
485 args->sa_privileged = 1;
486}
487
3bd2384a
CL		 488static int nfs40_setup_sequence(const struct nfs_server *server,
489 struct nfs4_sequence_args *args,
490 struct nfs4_sequence_res *res,
491 struct rpc_task *task)
492{
493 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
494 struct nfs4_slot *slot;
495
496 /* slot already allocated? */
497 if (res->sr_slot != NULL)
498 goto out_start;
499
500 spin_lock(&tbl->slot_tbl_lock);
501 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
502 goto out_sleep;
503
504 slot = nfs4_alloc_slot(tbl);
505 if (IS_ERR(slot)) {
506 if (slot == ERR_PTR(-ENOMEM))
507 task->tk_timeout = HZ >> 2;
508 goto out_sleep;
509 }
510 spin_unlock(&tbl->slot_tbl_lock);
511
512 args->sa_slot = slot;
513 res->sr_slot = slot;
514
515out_start:
516 rpc_call_start(task);
517 return 0;
518
519out_sleep:
520 if (args->sa_privileged)
521 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
522 NULL, RPC_PRIORITY_PRIVILEGED);
523 else
524 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
525 spin_unlock(&tbl->slot_tbl_lock);
526 return -EAGAIN;
527}
528
529static int nfs40_sequence_done(struct rpc_task *task,
530 struct nfs4_sequence_res *res)
531{
532 struct nfs4_slot *slot = res->sr_slot;
533 struct nfs4_slot_table *tbl;
534
535 if (!RPC_WAS_SENT(task))
536 goto out;
537
538 tbl = slot->table;
539 spin_lock(&tbl->slot_tbl_lock);
540 if (!nfs41_wake_and_assign_slot(tbl, slot))
541 nfs4_free_slot(tbl, slot);
542 spin_unlock(&tbl->slot_tbl_lock);
543
544 res->sr_slot = NULL;
545out:
546 return 1;
547}
548
cccef3b9
AA		 549#if defined(CONFIG_NFS_V4_1)
550
d185a334 551static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 552{
e3725ec0 553 struct nfs4_session *session;
13615871 554 struct nfs4_slot_table *tbl;
c10e4498 555 bool send_new_highest_used_slotid = false;
13615871 556
dfb4f309 557 if (!res->sr_slot) {
13615871
AA		 558 /* just wake up the next guy waiting since
559 * we may have not consumed a slot after all */
691daf3b 560 dprintk("%s: No slot\n", __func__);
35dc1d74 561 return;
13615871 562 }
e3725ec0
TM		 563 tbl = res->sr_slot->table;
564 session = tbl->session;
ea028ac9 565
35dc1d74 566 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 567 /* Be nice to the server: try to ensure that the last transmitted
568 * value for highest_user_slotid <= target_highest_slotid
569 */
570 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
571 send_new_highest_used_slotid = true;
572
b75ad4cd
TM		 573 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
574 send_new_highest_used_slotid = false;
575 goto out_unlock;
576 }
f4af6e2a 577 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 578
579 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
580 send_new_highest_used_slotid = false;
b75ad4cd 581out_unlock:
35dc1d74 582 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 583 res->sr_slot = NULL;
c10e4498
TM		 584 if (send_new_highest_used_slotid)
585 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 586}
587
14516c3a 588static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 589{
e3725ec0 590 struct nfs4_session *session;
933602e3 591 struct nfs4_slot *slot;
14516c3a 592 struct nfs_client *clp;
ac20d163 593 bool interrupted = false;
85563073 594 int ret = 1;
b0df806c 595
468f8613
BS		 596 /* don't increment the sequence number if the task wasn't sent */
597 if (!RPC_WAS_SENT(task))
b0df806c
AA		 598 goto out;
599
933602e3 600 slot = res->sr_slot;
e3725ec0 601 session = slot->table->session;
933602e3 602
ac20d163
TM		 603 if (slot->interrupted) {
604 slot->interrupted = 0;
605 interrupted = true;
606 }
607
2f92ae34 608 trace_nfs4_sequence_done(session, res);
691daf3b 609 /* Check the SEQUENCE operation status */
14516c3a
TM		 610 switch (res->sr_status) {
611 case 0:
b0df806c 612 /* Update the slot's sequence and clientid lease timer */
933602e3 613 ++slot->seq_nr;
e3725ec0 614 clp = session->clp;
8e63b6a8 615 do_renew_lease(clp, res->sr_timestamp);
0629e370 616 /* Check sequence flags */
b4410c2f
TM		 617 if (res->sr_status_flags != 0)
618 nfs4_schedule_lease_recovery(clp);
464ee9f9 619 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 620 break;
ac20d163
TM		 621 case 1:
622 /*
623 * sr_status remains 1 if an RPC level error occurred.
624 * The server may or may not have processed the sequence
625 * operation..
626 * Mark the slot as having hosted an interrupted RPC call.
627 */
628 slot->interrupted = 1;
629 goto out;
14516c3a
TM		 630 case -NFS4ERR_DELAY:
631 /* The server detected a resend of the RPC call and
632 * returned NFS4ERR_DELAY as per Section 2.10.6.2
633 * of RFC5661.
634 */
df2fabff 635 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 636 __func__,
df2fabff 637 slot->slot_nr,
933602e3 638 slot->seq_nr);
14516c3a 639 goto out_retry;
85563073
TM		 640 case -NFS4ERR_BADSLOT:
641 /*
642 * The slot id we used was probably retired. Try again
643 * using a different slot id.
644 */
e8794440
TM		 645 goto retry_nowait;
646 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 647 /*
648 * Was the last operation on this sequence interrupted?
649 * If so, retry after bumping the sequence number.
650 */
651 if (interrupted) {
652 ++slot->seq_nr;
653 goto retry_nowait;
654 }
e8794440
TM		 655 /*
656 * Could this slot have been previously retired?
657 * If so, then the server may be expecting seq_nr = 1!
658 */
8e63b6a8
TM		 659 if (slot->seq_nr != 1) {
660 slot->seq_nr = 1;
661 goto retry_nowait;
662 }
663 break;
e8794440
TM		 664 case -NFS4ERR_SEQ_FALSE_RETRY:
665 ++slot->seq_nr;
666 goto retry_nowait;
14516c3a
TM		 667 default:
668 /* Just update the slot sequence no. */
933602e3 669 ++slot->seq_nr;
b0df806c
AA		 670 }
671out:
672 /* The session may be reset by one of the error handlers. */
673 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 674 nfs41_sequence_free_slot(res);
85563073 675 return ret;
e8794440
TM		 676retry_nowait:
677 if (rpc_restart_call_prepare(task)) {
678 task->tk_status = 0;
679 ret = 0;
680 }
681 goto out;
14516c3a 682out_retry:
d05dd4e9 683 if (!rpc_restart_call(task))
14516c3a
TM		 684 goto out;
685 rpc_delay(task, NFS4_POLL_RETRY_MAX);
686 return 0;
b0df806c
AA		 687}
688
14516c3a
TM		 689static int nfs4_sequence_done(struct rpc_task *task,
690 struct nfs4_sequence_res *res)
df896455 691{
e3725ec0 692 if (res->sr_slot == NULL)
14516c3a 693 return 1;
3bd2384a
CL		 694 if (!res->sr_slot->table->session)
695 return nfs40_sequence_done(task, res);
14516c3a 696 return nfs41_sequence_done(task, res);
df896455
TM		 697}
698
dc70d7b3 699int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 700 struct nfs4_sequence_args *args,
701 struct nfs4_sequence_res *res,
ce5039c1
AA		 702 struct rpc_task *task)
703{
fbcd4abc
AA		 704 struct nfs4_slot *slot;
705 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 706
707 dprintk("--> %s\n", __func__);
ce5039c1 708 /* slot already allocated? */
dfb4f309 709 if (res->sr_slot != NULL)
d9afbd1b 710 goto out_success;
ce5039c1 711
fbcd4abc
AA		 712 tbl = &session->fc_slot_table;
713
69d206b5
TM		 714 task->tk_timeout = 0;
715
fbcd4abc 716 spin_lock(&tbl->slot_tbl_lock);
774d5f14 717 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 718 !args->sa_privileged) {
0b1c8fc4 719 /* The state manager will wait until the slot table is empty */
0b1c8fc4 720 dprintk("%s session is draining\n", __func__);
7b939a3f 721 goto out_sleep;
689cf5c1
AB		 722 }
723
2dc03b7f 724 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 725 if (IS_ERR(slot)) {
726 /* If out of memory, try again in 1/4 second */
727 if (slot == ERR_PTR(-ENOMEM))
728 task->tk_timeout = HZ >> 2;
fbcd4abc 729 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 730 goto out_sleep;
fbcd4abc
AA		 731 }
732 spin_unlock(&tbl->slot_tbl_lock);
733
2b2fa717 734 args->sa_slot = slot;
fbcd4abc 735
e8d92382 736 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 737 slot->slot_nr, slot->seq_nr);
fbcd4abc 738
dfb4f309 739 res->sr_slot = slot;
8e63b6a8 740 res->sr_timestamp = jiffies;
2a6e26cd 741 res->sr_status_flags = 0;
fbcd4abc
AA		 742 /*
743 * sr_status is only set in decode_sequence, and so will remain
744 * set to 1 if an rpc level failure occurs.
745 */
746 res->sr_status = 1;
2f92ae34 747 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 748out_success:
749 rpc_call_start(task);
ce5039c1 750 return 0;
7b939a3f 751out_sleep:
8fe72bac
TM		 752 /* Privileged tasks are queued with top priority */
753 if (args->sa_privileged)
1e1093c7
TM		 754 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
755 NULL, RPC_PRIORITY_PRIVILEGED);
756 else
757 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 758 spin_unlock(&tbl->slot_tbl_lock);
759 return -EAGAIN;
ce5039c1 760}
dc70d7b3 761EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 762
5a580e0a
CL		 763static int nfs4_setup_sequence(const struct nfs_server *server,
764 struct nfs4_sequence_args *args,
765 struct nfs4_sequence_res *res,
766 struct rpc_task *task)
ce5039c1 767{
035168ab 768 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 769 int ret = 0;
770
3bd2384a
CL		 771 if (!session)
772 return nfs40_setup_sequence(server, args, res, task);
035168ab 773
e8d92382 774 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 775 __func__, session->clp, session, res->sr_slot ?
e8d92382 776 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 777
9d12b216 778 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 779
ce5039c1
AA		 780 dprintk("<-- %s status=%d\n", __func__, ret);
781 return ret;
782}
783
ce5039c1
AA		 784static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
785{
2a3eb2b9 786 struct nfs4_call_sync_data *data = calldata;
6ba7db34 787 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 788
035168ab
TM		 789 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
790
d9afbd1b 791 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 792}
793
69ab40c4
AA		 794static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
795{
2a3eb2b9 796 struct nfs4_call_sync_data *data = calldata;
69ab40c4 797
14516c3a 798 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 799}
800
17280175 801static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 802 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 803 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 804};
805
3bd2384a
CL		 806#else /* !CONFIG_NFS_V4_1 */
807
9915ea7e
CL		 808static int nfs4_setup_sequence(const struct nfs_server *server,
809 struct nfs4_sequence_args *args,
810 struct nfs4_sequence_res *res,
811 struct rpc_task *task)
812{
3bd2384a 813 return nfs40_setup_sequence(server, args, res, task);
9915ea7e
CL		 814}
815
816static int nfs4_sequence_done(struct rpc_task *task,
817 struct nfs4_sequence_res *res)
818{
3bd2384a 819 return nfs40_sequence_done(task, res);
9915ea7e 820}
3bd2384a
CL		 821
822#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 823
824static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
825{
826 struct nfs4_call_sync_data *data = calldata;
827 nfs4_setup_sequence(data->seq_server,
828 data->seq_args, data->seq_res, task);
829}
830
831static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
832{
833 struct nfs4_call_sync_data *data = calldata;
834 nfs4_sequence_done(task, data->seq_res);
835}
836
837static const struct rpc_call_ops nfs40_call_sync_ops = {
838 .rpc_call_prepare = nfs40_call_sync_prepare,
839 .rpc_call_done = nfs40_call_sync_done,
840};
841
7c513058
BS		 842static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
843 struct nfs_server *server,
ce5039c1
AA		 844 struct rpc_message *msg,
845 struct nfs4_sequence_args *args,
8fe72bac 846 struct nfs4_sequence_res *res)
ce5039c1
AA		 847{
848 int ret;
849 struct rpc_task *task;
9915ea7e 850 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 851 struct nfs4_call_sync_data data = {
035168ab 852 .seq_server = server,
ce5039c1
AA		 853 .seq_args = args,
854 .seq_res = res,
ce5039c1
AA		 855 };
856 struct rpc_task_setup task_setup = {
7c513058 857 .rpc_client = clnt,
ce5039c1 858 .rpc_message = msg,
9915ea7e 859 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 860 .callback_data = &data
861 };
862
ce5039c1
AA		 863 task = rpc_run_task(&task_setup);
864 if (IS_ERR(task))
865 ret = PTR_ERR(task);
866 else {
867 ret = task->tk_status;
868 rpc_put_task(task);
869 }
870 return ret;
871}
872
fd0c0953 873static
7c513058
BS		 874int nfs4_call_sync(struct rpc_clnt *clnt,
875 struct nfs_server *server,
e73b83f2
BS		 876 struct rpc_message *msg,
877 struct nfs4_sequence_args *args,
878 struct nfs4_sequence_res *res,
879 int cache_reply)
880{
a9c92d6b 881 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 882 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 883}
cccef3b9 884
38478b24 885static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 886{
38478b24 887 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 888
38478b24 889 spin_lock(&dir->i_lock);
359d7d1c 890 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 891 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 892 nfs_force_lookup_revalidate(dir);
a9a4a87a 893 dir->i_version = cinfo->after;
de242c0b 894 nfs_fscache_invalidate(dir);
38478b24 895 spin_unlock(&dir->i_lock);
1da177e4
LT		 896}
897
e56e0b78 898struct nfs4_opendata {
c6d00e63 899 struct kref kref;
e56e0b78
TM		 900 struct nfs_openargs o_arg;
901 struct nfs_openres o_res;
cdd4e68b
TM		 902 struct nfs_open_confirmargs c_arg;
903 struct nfs_open_confirmres c_res;
6926afd1
TM		 904 struct nfs4_string owner_name;
905 struct nfs4_string group_name;
e56e0b78 906 struct nfs_fattr f_attr;
1775fd3e 907 struct nfs4_label *f_label;
e56e0b78 908 struct dentry *dir;
82a2c1b7 909 struct dentry *dentry;
e56e0b78 910 struct nfs4_state_owner *owner;
aac00a8d 911 struct nfs4_state *state;
e56e0b78 912 struct iattr attrs;
26e976a8 913 unsigned long timestamp;
3e309914 914 unsigned int rpc_done : 1;
bdeca1b7 915 unsigned int is_recover : 1;
24ac23ab
TM		 916 int rpc_status;
917 int cancelled;
e56e0b78
TM		 918};
919
49f9a0fa
TM		 920static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
921 int err, struct nfs4_exception *exception)
922{
923 if (err != -EINVAL)
924 return false;
925 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
926 return false;
927 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
928 exception->retry = 1;
929 return true;
930}
931
932static enum open_claim_type4
933nfs4_map_atomic_open_claim(struct nfs_server *server,
934 enum open_claim_type4 claim)
935{
936 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
937 return claim;
938 switch (claim) {
939 default:
940 return claim;
941 case NFS4_OPEN_CLAIM_FH:
942 return NFS4_OPEN_CLAIM_NULL;
943 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
944 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
945 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
946 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
947 }
948}
2ced46c2
TM		 949
950static void nfs4_init_opendata_res(struct nfs4_opendata *p)
951{
952 p->o_res.f_attr = &p->f_attr;
1775fd3e 953 p->o_res.f_label = p->f_label;
c1d51931
TM		 954 p->o_res.seqid = p->o_arg.seqid;
955 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 956 p->o_res.server = p->o_arg.server;
5f657530 957 p->o_res.access_request = p->o_arg.access;
2ced46c2 958 nfs_fattr_init(&p->f_attr);
6926afd1 959 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 960}
961
82a2c1b7 962static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 963 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 964 const struct iattr *attrs,
1775fd3e 965 struct nfs4_label *label,
4a1c0893 966 enum open_claim_type4 claim,
8535b2be 967 gfp_t gfp_mask)
e56e0b78 968{
82a2c1b7 969 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 970 struct inode *dir = parent->d_inode;
971 struct nfs_server *server = NFS_SERVER(dir);
972 struct nfs4_opendata *p;
973
8535b2be 974 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 975 if (p == NULL)
976 goto err;
14c43f76
DQ		 977
978 p->f_label = nfs4_label_alloc(server, gfp_mask);
979 if (IS_ERR(p->f_label))
980 goto err_free_p;
981
8535b2be 982 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 983 if (p->o_arg.seqid == NULL)
14c43f76 984 goto err_free_label;
82a2c1b7
AV		 985 nfs_sb_active(dentry->d_sb);
986 p->dentry = dget(dentry);
e56e0b78
TM		 987 p->dir = parent;
988 p->owner = sp;
989 atomic_inc(&sp->so_count);
dc0b027d
TM		 990 p->o_arg.open_flags = flags;
991 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 992 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
993 * will return permission denied for all bits until close */
994 if (!(flags & O_EXCL)) {
995 /* ask server to check for all possible rights as results
996 * are cached */
997 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
998 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 999 }
7539bbab 1000 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1001 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1002 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1003 p->o_arg.name = &dentry->d_name;
e56e0b78 1004 p->o_arg.server = server;
aa9c2669 1005 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1006 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1007 p->o_arg.label = label;
49f9a0fa
TM		 1008 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1009 switch (p->o_arg.claim) {
4a1c0893
TM		 1010 case NFS4_OPEN_CLAIM_NULL:
1011 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1012 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1013 p->o_arg.fh = NFS_FH(dir);
1014 break;
1015 case NFS4_OPEN_CLAIM_PREVIOUS:
1016 case NFS4_OPEN_CLAIM_FH:
1017 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1018 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1019 p->o_arg.fh = NFS_FH(dentry->d_inode);
1020 }
536e43d1 1021 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1022 __u32 verf[2];
d77d76ff 1023
e56e0b78
TM		 1024 p->o_arg.u.attrs = &p->attrs;
1025 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1026
1027 verf[0] = jiffies;
1028 verf[1] = current->pid;
1029 memcpy(p->o_arg.u.verifier.data, verf,
1030 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1031 }
cdd4e68b
TM		 1032 p->c_arg.fh = &p->o_res.fh;
1033 p->c_arg.stateid = &p->o_res.stateid;
1034 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1035 nfs4_init_opendata_res(p);
c6d00e63 1036 kref_init(&p->kref);
e56e0b78 1037 return p;
14c43f76
DQ		 1038
1039err_free_label:
1040 nfs4_label_free(p->f_label);
1041err_free_p:
e56e0b78
TM		 1042 kfree(p);
1043err:
1044 dput(parent);
1045 return NULL;
1046}
1047
c6d00e63 1048static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1049{
c6d00e63
TM		 1050 struct nfs4_opendata *p = container_of(kref,
1051 struct nfs4_opendata, kref);
82a2c1b7 1052 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1053
1054 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1055 if (p->state != NULL)
1056 nfs4_put_open_state(p->state);
c6d00e63 1057 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1058
1059 nfs4_label_free(p->f_label);
1060
c6d00e63 1061 dput(p->dir);
82a2c1b7
AV		 1062 dput(p->dentry);
1063 nfs_sb_deactive(sb);
6926afd1 1064 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 1065 kfree(p);
1066}
1067
1068static void nfs4_opendata_put(struct nfs4_opendata *p)
1069{
1070 if (p != NULL)
1071 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1072}
1073
06f814a3
TM		 1074static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1075{
06f814a3
TM		 1076 int ret;
1077
06f814a3 1078 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1079 return ret;
1080}
1081
dc0b027d 1082static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1083{
1084 int ret = 0;
dc0b027d 1085
536e43d1 1086 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1087 goto out;
1088 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1089 case FMODE_READ:
88069f77
TM		 1090 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1091 && state->n_rdonly != 0;
6ee41268
TM		 1092 break;
1093 case FMODE_WRITE:
88069f77
TM		 1094 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1095 && state->n_wronly != 0;
6ee41268
TM		 1096 break;
1097 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1098 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1099 && state->n_rdwr != 0;
6ee41268 1100 }
dc0b027d 1101out:
6ee41268
TM		 1102 return ret;
1103}
1104
dc0b027d 1105static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1106{
652f89f6
TM		 1107 if (delegation == NULL)
1108 return 0;
dc0b027d 1109 if ((delegation->type & fmode) != fmode)
aac00a8d 1110 return 0;
15c831bf 1111 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 1112 return 0;
d25be546
TM		 1113 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1114 return 0;
b7391f44 1115 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1116 return 1;
1117}
1118
dc0b027d 1119static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1120{
dc0b027d 1121 switch (fmode) {
e7616923
TM		 1122 case FMODE_WRITE:
1123 state->n_wronly++;
1124 break;
1125 case FMODE_READ:
1126 state->n_rdonly++;
1127 break;
1128 case FMODE_READ|FMODE_WRITE:
1129 state->n_rdwr++;
1130 }
dc0b027d 1131 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1132}
1133
dc0b027d 1134static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 1135{
1136 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1137 nfs4_stateid_copy(&state->stateid, stateid);
1138 nfs4_stateid_copy(&state->open_stateid, stateid);
92b40e93 1139 set_bit(NFS_OPEN_STATE, &state->flags);
dc0b027d 1140 switch (fmode) {
003707c7
TM		 1141 case FMODE_READ:
1142 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1143 break;
1144 case FMODE_WRITE:
1145 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1146 break;
1147 case FMODE_READ|FMODE_WRITE:
1148 set_bit(NFS_O_RDWR_STATE, &state->flags);
1149 }
e7616923
TM		 1150}
1151
dc0b027d 1152static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1153{
8bda4e4c 1154 write_seqlock(&state->seqlock);
dc0b027d 1155 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1156 write_sequnlock(&state->seqlock);
003707c7
TM		 1157}
1158
dc0b027d 1159static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1160{
8bda4e4c
TM		 1161 /*
1162 * Protect the call to nfs4_state_set_mode_locked and
1163 * serialise the stateid update
1164 */
1165 write_seqlock(&state->seqlock);
003707c7 1166 if (deleg_stateid != NULL) {
f597c537 1167 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1168 set_bit(NFS_DELEGATED_STATE, &state->flags);
1169 }
1170 if (open_stateid != NULL)
dc0b027d 1171 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1172 write_sequnlock(&state->seqlock);
1173 spin_lock(&state->owner->so_lock);
dc0b027d 1174 update_open_stateflags(state, fmode);
ec073428 1175 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1176}
1177
dc0b027d 1178static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1179{
1180 struct nfs_inode *nfsi = NFS_I(state->inode);
1181 struct nfs_delegation *deleg_cur;
1182 int ret = 0;
1183
dc0b027d 1184 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1185
1186 rcu_read_lock();
1187 deleg_cur = rcu_dereference(nfsi->delegation);
1188 if (deleg_cur == NULL)
1189 goto no_delegation;
1190
1191 spin_lock(&deleg_cur->lock);
17f26b12 1192 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1193 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1194 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1195 goto no_delegation_unlock;
1196
1197 if (delegation == NULL)
1198 delegation = &deleg_cur->stateid;
f597c537 1199 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1200 goto no_delegation_unlock;
1201
b7391f44 1202 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1203 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1204 ret = 1;
1205no_delegation_unlock:
1206 spin_unlock(&deleg_cur->lock);
1207no_delegation:
1208 rcu_read_unlock();
1209
1210 if (!ret && open_stateid != NULL) {
dc0b027d 1211 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1212 ret = 1;
1213 }
1214
1215 return ret;
1216}
1217
1218
dc0b027d 1219static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1220{
1221 struct nfs_delegation *delegation;
1222
1223 rcu_read_lock();
1224 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1225 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1226 rcu_read_unlock();
1227 return;
1228 }
1229 rcu_read_unlock();
57ec14c5 1230 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1231}
1232
6ee41268 1233static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1234{
1235 struct nfs4_state *state = opendata->state;
1236 struct nfs_inode *nfsi = NFS_I(state->inode);
1237 struct nfs_delegation *delegation;
f448badd 1238 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1239 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1240 nfs4_stateid stateid;
1241 int ret = -EAGAIN;
1242
aac00a8d 1243 for (;;) {
dc0b027d 1244 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1245 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1246 if (can_open_cached(state, fmode, open_mode)) {
1247 update_open_stateflags(state, fmode);
6ee41268 1248 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1249 goto out_return_state;
1250 }
1251 spin_unlock(&state->owner->so_lock);
1252 }
34310430
TM		 1253 rcu_read_lock();
1254 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1255 if (!can_open_delegated(delegation, fmode)) {
34310430 1256 rcu_read_unlock();
aac00a8d 1257 break;
34310430 1258 }
aac00a8d 1259 /* Save the delegation */
f597c537 1260 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1261 rcu_read_unlock();
fa332941 1262 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1263 if (!opendata->is_recover) {
1264 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1265 if (ret != 0)
1266 goto out;
1267 }
aac00a8d 1268 ret = -EAGAIN;
34310430
TM		 1269
1270 /* Try to update the stateid using the delegation */
dc0b027d 1271 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1272 goto out_return_state;
aac00a8d 1273 }
aac00a8d
TM		 1274out:
1275 return ERR_PTR(ret);
1276out_return_state:
1277 atomic_inc(&state->count);
1278 return state;
1279}
1280
e23008ec
AA		 1281static void
1282nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1283{
1284 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1285 struct nfs_delegation *delegation;
1286 int delegation_flags = 0;
1287
1288 rcu_read_lock();
1289 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1290 if (delegation)
1291 delegation_flags = delegation->flags;
1292 rcu_read_unlock();
1293 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1294 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1295 "returning a delegation for "
1296 "OPEN(CLAIM_DELEGATE_CUR)\n",
1297 clp->cl_hostname);
1298 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1299 nfs_inode_set_delegation(state->inode,
1300 data->owner->so_cred,
1301 &data->o_res);
1302 else
1303 nfs_inode_reclaim_delegation(state->inode,
1304 data->owner->so_cred,
1305 &data->o_res);
1306}
1307
1308/*
1309 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1310 * and update the nfs4_state.
1311 */
1312static struct nfs4_state *
1313_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1314{
1315 struct inode *inode = data->state->inode;
1316 struct nfs4_state *state = data->state;
1317 int ret;
1318
1319 if (!data->rpc_done) {
1320 ret = data->rpc_status;
1321 goto err;
1322 }
1323
1324 ret = -ESTALE;
1325 if (!(data->f_attr.valid & NFS_ATTR_FATTR_TYPE) ||
1326 !(data->f_attr.valid & NFS_ATTR_FATTR_FILEID) ||
1327 !(data->f_attr.valid & NFS_ATTR_FATTR_CHANGE))
1328 goto err;
1329
1330 ret = -ENOMEM;
1331 state = nfs4_get_open_state(inode, data->owner);
1332 if (state == NULL)
1333 goto err;
1334
1335 ret = nfs_refresh_inode(inode, &data->f_attr);
1336 if (ret)
1337 goto err;
1338
aa9c2669
DQ		 1339 nfs_setsecurity(inode, &data->f_attr, data->f_label);
1340
e23008ec
AA		 1341 if (data->o_res.delegation_type != 0)
1342 nfs4_opendata_check_deleg(data, state);
1343 update_open_stateid(state, &data->o_res.stateid, NULL,
1344 data->o_arg.fmode);
1345
1346 return state;
1347err:
1348 return ERR_PTR(ret);
1349
1350}
1351
1352static struct nfs4_state *
1353_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1354{
1355 struct inode *inode;
1356 struct nfs4_state *state = NULL;
1b370bc2 1357 int ret;
24ac23ab 1358
aac00a8d 1359 if (!data->rpc_done) {
6ee41268 1360 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1361 goto out;
1362 }
1363
1b370bc2 1364 ret = -EAGAIN;
24ac23ab 1365 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1366 goto err;
1775fd3e 1367 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1368 ret = PTR_ERR(inode);
03f28e3a 1369 if (IS_ERR(inode))
1b370bc2
TM		 1370 goto err;
1371 ret = -ENOMEM;
24ac23ab
TM		 1372 state = nfs4_get_open_state(inode, data->owner);
1373 if (state == NULL)
1b370bc2 1374 goto err_put_inode;
e23008ec
AA		 1375 if (data->o_res.delegation_type != 0)
1376 nfs4_opendata_check_deleg(data, state);
34310430 1377 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1378 data->o_arg.fmode);
24ac23ab 1379 iput(inode);
aac00a8d 1380out:
7aa262b5 1381 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1382 return state;
1b370bc2
TM		 1383err_put_inode:
1384 iput(inode);
1385err:
1386 return ERR_PTR(ret);
24ac23ab
TM		 1387}
1388
e23008ec
AA		 1389static struct nfs4_state *
1390nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1391{
1392 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1393 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1394 return _nfs4_opendata_to_nfs4_state(data);
1395}
1396
864472e9
TM		 1397static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1398{
1399 struct nfs_inode *nfsi = NFS_I(state->inode);
1400 struct nfs_open_context *ctx;
1401
1402 spin_lock(&state->inode->i_lock);
1403 list_for_each_entry(ctx, &nfsi->open_files, list) {
1404 if (ctx->state != state)
1405 continue;
1406 get_nfs_open_context(ctx);
1407 spin_unlock(&state->inode->i_lock);
1408 return ctx;
1409 }
1410 spin_unlock(&state->inode->i_lock);
1411 return ERR_PTR(-ENOENT);
1412}
1413
4a1c0893
TM		 1414static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1415 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1416{
1417 struct nfs4_opendata *opendata;
1418
4a1c0893 1419 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1420 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1421 if (opendata == NULL)
1422 return ERR_PTR(-ENOMEM);
1423 opendata->state = state;
1424 atomic_inc(&state->count);
1425 return opendata;
1426}
1427
dc0b027d 1428static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1429{
2ced46c2 1430 struct nfs4_state *newstate;
864472e9
TM		 1431 int ret;
1432
dc0b027d
TM		 1433 opendata->o_arg.open_flags = 0;
1434 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1435 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1436 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1437 nfs4_init_opendata_res(opendata);
b257957e 1438 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1439 if (ret != 0)
1440 return ret;
2ced46c2 1441 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1442 if (IS_ERR(newstate))
1443 return PTR_ERR(newstate);
643168c2 1444 nfs4_close_state(newstate, fmode);
2ced46c2 1445 *res = newstate;
864472e9
TM		 1446 return 0;
1447}
1448
1449static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1450{
864472e9 1451 struct nfs4_state *newstate;
864472e9
TM		 1452 int ret;
1453
1454 /* memory barrier prior to reading state->n_* */
2ced46c2 1455 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1456 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1457 smp_rmb();
1458 if (state->n_rdwr != 0) {
b0ed9dbc 1459 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1460 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1461 if (ret != 0)
1462 return ret;
2ced46c2
TM		 1463 if (newstate != state)
1464 return -ESTALE;
864472e9
TM		 1465 }
1466 if (state->n_wronly != 0) {
b0ed9dbc 1467 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1468 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1469 if (ret != 0)
1470 return ret;
2ced46c2
TM		 1471 if (newstate != state)
1472 return -ESTALE;
864472e9
TM		 1473 }
1474 if (state->n_rdonly != 0) {
b0ed9dbc 1475 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1476 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1477 if (ret != 0)
1478 return ret;
2ced46c2
TM		 1479 if (newstate != state)
1480 return -ESTALE;
864472e9 1481 }
1ac7e2fd
TM		 1482 /*
1483 * We may have performed cached opens for all three recoveries.
1484 * Check if we need to update the current stateid.
1485 */
1486 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1487 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1488 write_seqlock(&state->seqlock);
1ac7e2fd 1489 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1490 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1491 write_sequnlock(&state->seqlock);
1ac7e2fd 1492 }
864472e9
TM		 1493 return 0;
1494}
1495
1da177e4
LT		 1496/*
1497 * OPEN_RECLAIM:
1498 * reclaim state on the server after a reboot.
1da177e4 1499 */
539cd03a 1500static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1501{
1ac7e2fd 1502 struct nfs_delegation *delegation;
864472e9 1503 struct nfs4_opendata *opendata;
dc0b027d 1504 fmode_t delegation_type = 0;
1da177e4
LT		 1505 int status;
1506
4a1c0893
TM		 1507 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1508 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1509 if (IS_ERR(opendata))
1510 return PTR_ERR(opendata);
1ac7e2fd
TM		 1511 rcu_read_lock();
1512 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1513 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1514 delegation_type = delegation->type;
1ac7e2fd 1515 rcu_read_unlock();
864472e9
TM		 1516 opendata->o_arg.u.delegation_type = delegation_type;
1517 status = nfs4_open_recover(opendata, state);
c6d00e63 1518 nfs4_opendata_put(opendata);
1da177e4
LT		 1519 return status;
1520}
1521
539cd03a 1522static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1523{
1524 struct nfs_server *server = NFS_SERVER(state->inode);
1525 struct nfs4_exception exception = { };
1526 int err;
1527 do {
539cd03a 1528 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1529 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1530 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1531 continue;
168667c4 1532 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1533 break;
1534 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1535 } while (exception.retry);
1536 return err;
1537}
1538
864472e9
TM		 1539static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1540{
1541 struct nfs_open_context *ctx;
1542 int ret;
1543
1544 ctx = nfs4_state_find_open_context(state);
1545 if (IS_ERR(ctx))
91876b13 1546 return -EAGAIN;
539cd03a 1547 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1548 put_nfs_open_context(ctx);
1549 return ret;
1550}
1551
db4f2e63 1552static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1553{
be76b5b6
TM		 1554 switch (err) {
1555 default:
1556 printk(KERN_ERR "NFS: %s: unhandled error "
1557 "%d.\n", __func__, err);
1558 case 0:
1559 case -ENOENT:
1560 case -ESTALE:
1561 break;
1562 case -NFS4ERR_BADSESSION:
1563 case -NFS4ERR_BADSLOT:
1564 case -NFS4ERR_BAD_HIGH_SLOT:
1565 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1566 case -NFS4ERR_DEADSESSION:
1567 set_bit(NFS_DELEGATED_STATE, &state->flags);
1568 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1569 return -EAGAIN;
1570 case -NFS4ERR_STALE_CLIENTID:
1571 case -NFS4ERR_STALE_STATEID:
1572 set_bit(NFS_DELEGATED_STATE, &state->flags);
1573 case -NFS4ERR_EXPIRED:
1574 /* Don't recall a delegation if it was lost */
1575 nfs4_schedule_lease_recovery(server->nfs_client);
1576 return -EAGAIN;
1577 case -NFS4ERR_DELEG_REVOKED:
1578 case -NFS4ERR_ADMIN_REVOKED:
1579 case -NFS4ERR_BAD_STATEID:
db4f2e63 1580 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1581 nfs_inode_find_state_and_recover(state->inode,
1582 stateid);
1583 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1584 return 0;
1585 case -NFS4ERR_DELAY:
1586 case -NFS4ERR_GRACE:
1587 set_bit(NFS_DELEGATED_STATE, &state->flags);
1588 ssleep(1);
1589 return -EAGAIN;
db4f2e63
TM		 1590 case -ENOMEM:
1591 case -NFS4ERR_DENIED:
1592 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1593 return 0;
be76b5b6 1594 }
1da177e4
LT		 1595 return err;
1596}
1597
db4f2e63
TM		 1598int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1599{
1600 struct nfs_server *server = NFS_SERVER(state->inode);
1601 struct nfs4_opendata *opendata;
1602 int err;
1603
1604 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1605 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1606 if (IS_ERR(opendata))
1607 return PTR_ERR(opendata);
1608 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1609 err = nfs4_open_recover(opendata, state);
1610 nfs4_opendata_put(opendata);
1611 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1612}
1613
be05c860
CL		 1614static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1615{
1616 struct nfs4_opendata *data = calldata;
1617
1618 nfs40_setup_sequence(data->o_arg.server, &data->o_arg.seq_args,
1619 &data->o_res.seq_res, task);
1620}
1621
cdd4e68b
TM		 1622static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1623{
1624 struct nfs4_opendata *data = calldata;
1625
be05c860
CL		 1626 nfs40_sequence_done(task, &data->o_res.seq_res);
1627
cdd4e68b 1628 data->rpc_status = task->tk_status;
26e976a8 1629 if (data->rpc_status == 0) {
f597c537 1630 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1631 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1632 renew_lease(data->o_res.server, data->timestamp);
3e309914 1633 data->rpc_done = 1;
26e976a8 1634 }
cdd4e68b
TM		 1635}
1636
1637static void nfs4_open_confirm_release(void *calldata)
1638{
1639 struct nfs4_opendata *data = calldata;
1640 struct nfs4_state *state = NULL;
1641
1642 /* If this request hasn't been cancelled, do nothing */
1643 if (data->cancelled == 0)
1644 goto out_free;
1645 /* In case of error, no cleanup! */
3e309914 1646 if (!data->rpc_done)
cdd4e68b 1647 goto out_free;
cdd4e68b 1648 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1649 if (!IS_ERR(state))
643168c2 1650 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1651out_free:
c6d00e63 1652 nfs4_opendata_put(data);
cdd4e68b
TM		 1653}
1654
1655static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1656 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1657 .rpc_call_done = nfs4_open_confirm_done,
1658 .rpc_release = nfs4_open_confirm_release,
1659};
1660
1661/*
1662 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1663 */
1664static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1665{
1666 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1667 struct rpc_task *task;
5138fde0
TM		 1668 struct rpc_message msg = {
1669 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1670 .rpc_argp = &data->c_arg,
1671 .rpc_resp = &data->c_res,
1672 .rpc_cred = data->owner->so_cred,
1673 };
c970aa85
TM		 1674 struct rpc_task_setup task_setup_data = {
1675 .rpc_client = server->client,
5138fde0 1676 .rpc_message = &msg,
c970aa85
TM		 1677 .callback_ops = &nfs4_open_confirm_ops,
1678 .callback_data = data,
101070ca 1679 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1680 .flags = RPC_TASK_ASYNC,
1681 };
1da177e4
LT		 1682 int status;
1683
be05c860 1684 nfs4_init_sequence(&data->o_arg.seq_args, &data->o_res.seq_res, 1);
c6d00e63 1685 kref_get(&data->kref);
3e309914
TM		 1686 data->rpc_done = 0;
1687 data->rpc_status = 0;
5138fde0 1688 data->timestamp = jiffies;
c970aa85 1689 task = rpc_run_task(&task_setup_data);
7a1218a2 1690 if (IS_ERR(task))
cdd4e68b 1691 return PTR_ERR(task);
cdd4e68b
TM		 1692 status = nfs4_wait_for_completion_rpc_task(task);
1693 if (status != 0) {
1694 data->cancelled = 1;
1695 smp_wmb();
1696 } else
1697 status = data->rpc_status;
e6b3c4db 1698 rpc_put_task(task);
1da177e4
LT		 1699 return status;
1700}
1701
24ac23ab 1702static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1703{
24ac23ab
TM		 1704 struct nfs4_opendata *data = calldata;
1705 struct nfs4_state_owner *sp = data->owner;
549b19cc 1706 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1707
24ac23ab 1708 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1709 goto out_wait;
aac00a8d
TM		 1710 /*
1711 * Check if we still need to send an OPEN call, or if we can use
1712 * a delegation instead.
1713 */
1714 if (data->state != NULL) {
1715 struct nfs_delegation *delegation;
1716
dc0b027d 1717 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1718 goto out_no_action;
aac00a8d
TM		 1719 rcu_read_lock();
1720 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1721 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1722 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1723 can_open_delegated(delegation, data->o_arg.fmode))
1724 goto unlock_no_action;
aac00a8d
TM		 1725 rcu_read_unlock();
1726 }
95b72eb0 1727 /* Update client id. */
549b19cc 1728 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1729 switch (data->o_arg.claim) {
1730 case NFS4_OPEN_CLAIM_PREVIOUS:
1731 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1732 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1733 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1734 case NFS4_OPEN_CLAIM_FH:
1735 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1736 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1737 }
26e976a8 1738 data->timestamp = jiffies;
035168ab 1739 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1740 &data->o_arg.seq_args,
2240a9e2
TM		 1741 &data->o_res.seq_res,
1742 task) != 0)
1743 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1744
1745 /* Set the create mode (note dependency on the session type) */
1746 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1747 if (data->o_arg.open_flags & O_EXCL) {
1748 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1749 if (nfs4_has_persistent_session(clp))
1750 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1751 else if (clp->cl_mvops->minor_version > 0)
1752 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1753 }
6ee41268 1754 return;
652f89f6
TM		 1755unlock_no_action:
1756 rcu_read_unlock();
6ee41268
TM		 1757out_no_action:
1758 task->tk_action = NULL;
c8da19b9 1759out_wait:
b75ad4cd 1760 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1761}
1762
24ac23ab
TM		 1763static void nfs4_open_done(struct rpc_task *task, void *calldata)
1764{
1765 struct nfs4_opendata *data = calldata;
1da177e4 1766
24ac23ab 1767 data->rpc_status = task->tk_status;
d898528c 1768
14516c3a
TM		 1769 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1770 return;
d898528c 1771
24ac23ab 1772 if (task->tk_status == 0) {
807d66d8
TM		 1773 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1774 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1775 case S_IFREG:
1776 break;
1777 case S_IFLNK:
24ac23ab 1778 data->rpc_status = -ELOOP;
6f926b5b
TM		 1779 break;
1780 case S_IFDIR:
24ac23ab 1781 data->rpc_status = -EISDIR;
6f926b5b
TM		 1782 break;
1783 default:
24ac23ab 1784 data->rpc_status = -ENOTDIR;
807d66d8 1785 }
6f926b5b 1786 }
26e976a8 1787 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1788 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1789 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1790 }
3e309914 1791 data->rpc_done = 1;
24ac23ab 1792}
6f926b5b 1793
24ac23ab
TM		 1794static void nfs4_open_release(void *calldata)
1795{
1796 struct nfs4_opendata *data = calldata;
1797 struct nfs4_state *state = NULL;
1798
1799 /* If this request hasn't been cancelled, do nothing */
1800 if (data->cancelled == 0)
1801 goto out_free;
1802 /* In case of error, no cleanup! */
3e309914 1803 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1804 goto out_free;
1805 /* In case we need an open_confirm, no cleanup! */
1806 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1807 goto out_free;
24ac23ab 1808 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1809 if (!IS_ERR(state))
643168c2 1810 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1811out_free:
c6d00e63 1812 nfs4_opendata_put(data);
24ac23ab
TM		 1813}
1814
1815static const struct rpc_call_ops nfs4_open_ops = {
1816 .rpc_call_prepare = nfs4_open_prepare,
1817 .rpc_call_done = nfs4_open_done,
1818 .rpc_release = nfs4_open_release,
1819};
1820
b257957e 1821static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1822{
1823 struct inode *dir = data->dir->d_inode;
1824 struct nfs_server *server = NFS_SERVER(dir);
1825 struct nfs_openargs *o_arg = &data->o_arg;
1826 struct nfs_openres *o_res = &data->o_res;
1827 struct rpc_task *task;
5138fde0
TM		 1828 struct rpc_message msg = {
1829 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1830 .rpc_argp = o_arg,
1831 .rpc_resp = o_res,
1832 .rpc_cred = data->owner->so_cred,
1833 };
c970aa85
TM		 1834 struct rpc_task_setup task_setup_data = {
1835 .rpc_client = server->client,
5138fde0 1836 .rpc_message = &msg,
c970aa85
TM		 1837 .callback_ops = &nfs4_open_ops,
1838 .callback_data = data,
101070ca 1839 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1840 .flags = RPC_TASK_ASYNC,
1841 };
24ac23ab
TM		 1842 int status;
1843
a9c92d6b 1844 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1845 kref_get(&data->kref);
3e309914
TM		 1846 data->rpc_done = 0;
1847 data->rpc_status = 0;
2ced46c2 1848 data->cancelled = 0;
bdeca1b7
TM		 1849 data->is_recover = 0;
1850 if (isrecover) {
8fe72bac 1851 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1852 data->is_recover = 1;
1853 }
c970aa85 1854 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1855 if (IS_ERR(task))
1856 return PTR_ERR(task);
1857 status = nfs4_wait_for_completion_rpc_task(task);
1858 if (status != 0) {
1859 data->cancelled = 1;
1860 smp_wmb();
1861 } else
1862 status = data->rpc_status;
1863 rpc_put_task(task);
1864
1865 return status;
1866}
1867
1868static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1869{
1870 struct inode *dir = data->dir->d_inode;
1871 struct nfs_openres *o_res = &data->o_res;
1872 int status;
1873
1874 status = nfs4_run_open_task(data, 1);
1875 if (status != 0 || !data->rpc_done)
1876 return status;
1877
6926afd1
TM		 1878 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1879
b257957e
AB		 1880 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1881 status = _nfs4_proc_open_confirm(data);
1882 if (status != 0)
1883 return status;
1884 }
1885
1886 return status;
1887}
1888
6168f62c
WAA		 1889static int nfs4_opendata_access(struct rpc_cred *cred,
1890 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1891 struct nfs4_state *state, fmode_t fmode,
1892 int openflags)
6168f62c
WAA		 1893{
1894 struct nfs_access_entry cache;
1895 u32 mask;
1896
1897 /* access call failed or for some reason the server doesn't
1898 * support any access modes -- defer access call until later */
1899 if (opendata->o_res.access_supported == 0)
1900 return 0;
1901
1902 mask = 0;
bbd3a8ee 1903 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1904 * write mode bits, but POSIX allows the creating process to write.
1905 * use openflags to check for exec, because fmode won't
1906 * always have FMODE_EXEC set when file open for exec. */
1907 if (openflags & __FMODE_EXEC) {
1908 /* ONLY check for exec rights */
1909 mask = MAY_EXEC;
1910 } else if (fmode & FMODE_READ)
1911 mask = MAY_READ;
6168f62c
WAA		 1912
1913 cache.cred = cred;
1914 cache.jiffies = jiffies;
1915 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1916 nfs_access_add_cache(state->inode, &cache);
1917
bbd3a8ee 1918 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1919 return 0;
1920
1921 /* even though OPEN succeeded, access is denied. Close the file */
1922 nfs4_close_state(state, fmode);
998f40b5 1923 return -EACCES;
6168f62c
WAA		 1924}
1925
b257957e
AB		 1926/*
1927 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1928 */
1929static int _nfs4_proc_open(struct nfs4_opendata *data)
1930{
1931 struct inode *dir = data->dir->d_inode;
1932 struct nfs_server *server = NFS_SERVER(dir);
1933 struct nfs_openargs *o_arg = &data->o_arg;
1934 struct nfs_openres *o_res = &data->o_res;
1935 int status;
1936
1937 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1938 if (!data->rpc_done)
1939 return status;
1940 if (status != 0) {
1941 if (status == -NFS4ERR_BADNAME &&
1942 !(o_arg->open_flags & O_CREAT))
1943 return -ENOENT;
24ac23ab 1944 return status;
08ef7bd3 1945 }
24ac23ab 1946
6926afd1
TM		 1947 nfs_fattr_map_and_free_names(server, &data->f_attr);
1948
90ff0c54 1949 if (o_arg->open_flags & O_CREAT)
56ae19f3 1950 update_changeattr(dir, &o_res->cinfo);
0df5dd4a
TM		 1951 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1952 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1953 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1954 status = _nfs4_proc_open_confirm(data);
1da177e4 1955 if (status != 0)
24ac23ab 1956 return status;
1da177e4
LT		 1957 }
1958 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1775fd3e 1959 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 1960 return 0;
1da177e4
LT		 1961}
1962
d83217c1
AA		 1963static int nfs4_recover_expired_lease(struct nfs_server *server)
1964{
1965 return nfs4_client_recover_expired_lease(server->nfs_client);
1966}
1967
1da177e4
LT		 1968/*
1969 * OPEN_EXPIRED:
1970 * reclaim state on the server after a network partition.
1971 * Assumes caller holds the appropriate lock
1972 */
539cd03a 1973static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1974{
e56e0b78 1975 struct nfs4_opendata *opendata;
864472e9 1976 int ret;
1da177e4 1977
4a1c0893 1978 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1979 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1980 if (IS_ERR(opendata))
1981 return PTR_ERR(opendata);
864472e9 1982 ret = nfs4_open_recover(opendata, state);
35d05778 1983 if (ret == -ESTALE)
3d4ff43d 1984 d_drop(ctx->dentry);
c6d00e63 1985 nfs4_opendata_put(opendata);
864472e9 1986 return ret;
1da177e4
LT		 1987}
1988
a9ed2e25 1989static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 1990{
539cd03a 1991 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 1992 struct nfs4_exception exception = { };
1993 int err;
1994
1995 do {
539cd03a 1996 err = _nfs4_open_expired(ctx, state);
42113a75 1997 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 1998 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1999 continue;
a9ed2e25
TM		 2000 switch (err) {
2001 default:
2002 goto out;
2003 case -NFS4ERR_GRACE:
2004 case -NFS4ERR_DELAY:
2005 nfs4_handle_exception(server, err, &exception);
2006 err = 0;
2007 }
202b50dc 2008 } while (exception.retry);
a9ed2e25 2009out:
202b50dc
TM		 2010 return err;
2011}
2012
1da177e4
LT		 2013static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2014{
1da177e4 2015 struct nfs_open_context *ctx;
864472e9 2016 int ret;
1da177e4 2017
864472e9
TM		 2018 ctx = nfs4_state_find_open_context(state);
2019 if (IS_ERR(ctx))
91876b13 2020 return -EAGAIN;
539cd03a 2021 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2022 put_nfs_open_context(ctx);
2023 return ret;
1da177e4
LT		 2024}
2025
f062eb6c 2026#if defined(CONFIG_NFS_V4_1)
3e60ffdd 2027static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 2028{
f062eb6c 2029 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd 2030 nfs4_stateid *stateid = &state->stateid;
ab7cb0df
TM		 2031 struct nfs_delegation *delegation;
2032 struct rpc_cred *cred = NULL;
2033 int status = -NFS4ERR_BAD_STATEID;
3e60ffdd
CL		 2034
2035 /* If a state reset has been done, test_stateid is unneeded */
2036 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2037 return;
2038
ab7cb0df
TM		 2039 /* Get the delegation credential for use by test/free_stateid */
2040 rcu_read_lock();
2041 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2042 if (delegation != NULL &&
2043 nfs4_stateid_match(&delegation->stateid, stateid)) {
2044 cred = get_rpccred(delegation->cred);
2045 rcu_read_unlock();
2046 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2047 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df
TM		 2048 } else
2049 rcu_read_unlock();
2050
3e60ffdd
CL		 2051 if (status != NFS_OK) {
2052 /* Free the stateid unless the server explicitly
2053 * informs us the stateid is unrecognized. */
2054 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2055 nfs41_free_stateid(server, stateid, cred);
6938867e 2056 nfs_remove_bad_delegation(state->inode);
3e60ffdd 2057
6938867e
BS		 2058 write_seqlock(&state->seqlock);
2059 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2060 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 2061 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2062 }
ab7cb0df
TM		 2063
2064 if (cred != NULL)
2065 put_rpccred(cred);
3e60ffdd
CL		 2066}
2067
2068/**
2069 * nfs41_check_open_stateid - possibly free an open stateid
2070 *
2071 * @state: NFSv4 state for an inode
2072 *
2073 * Returns NFS_OK if recovery for this stateid is now finished.
2074 * Otherwise a negative NFS4ERR value is returned.
2075 */
2076static int nfs41_check_open_stateid(struct nfs4_state *state)
2077{
2078 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2079 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2080 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2081 int status;
2082
2083 /* If a state reset has been done, test_stateid is unneeded */
2084 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2085 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2086 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2087 return -NFS4ERR_BAD_STATEID;
2088
ab7cb0df 2089 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2090 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2091 if (status != NFS_OK) {
2092 /* Free the stateid unless the server explicitly
2093 * informs us the stateid is unrecognized. */
2094 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2095 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2096
2097 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2098 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2099 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2100 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2101 }
2102 return status;
2103}
2104
2105static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2106{
eb64cf96 2107 int status;
b01dd1d8 2108
3e60ffdd
CL		 2109 nfs41_clear_delegation_stateid(state);
2110 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2111 if (status != NFS_OK)
2112 status = nfs4_open_expired(sp, state);
2113 return status;
f062eb6c
BS		 2114}
2115#endif
2116
aa53ed54
JL		 2117/*
2118 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2119 * fields corresponding to attributes that were used to store the verifier.
2120 * Make sure we clobber those fields in the later setattr call
2121 */
2122static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2123{
2124 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2125 !(sattr->ia_valid & ATTR_ATIME_SET))
2126 sattr->ia_valid |= ATTR_ATIME;
2127
2128 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2129 !(sattr->ia_valid & ATTR_MTIME_SET))
2130 sattr->ia_valid |= ATTR_MTIME;
2131}
2132
c21443c2
TM		 2133static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2134 fmode_t fmode,
2135 int flags,
3efb9722 2136 struct nfs_open_context *ctx)
c21443c2
TM		 2137{
2138 struct nfs4_state_owner *sp = opendata->owner;
2139 struct nfs_server *server = sp->so_server;
275bb307 2140 struct dentry *dentry;
c21443c2
TM		 2141 struct nfs4_state *state;
2142 unsigned int seq;
2143 int ret;
2144
2145 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2146
2147 ret = _nfs4_proc_open(opendata);
2148 if (ret != 0)
2149 goto out;
2150
2151 state = nfs4_opendata_to_nfs4_state(opendata);
2152 ret = PTR_ERR(state);
2153 if (IS_ERR(state))
2154 goto out;
2155 if (server->caps & NFS_CAP_POSIX_LOCK)
2156 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2157
275bb307
TM		 2158 dentry = opendata->dentry;
2159 if (dentry->d_inode == NULL) {
2160 /* FIXME: Is this d_drop() ever needed? */
2161 d_drop(dentry);
2162 dentry = d_add_unique(dentry, igrab(state->inode));
2163 if (dentry == NULL) {
2164 dentry = opendata->dentry;
2165 } else if (dentry != ctx->dentry) {
2166 dput(ctx->dentry);
2167 ctx->dentry = dget(dentry);
2168 }
2169 nfs_set_verifier(dentry,
2170 nfs_save_change_attribute(opendata->dir->d_inode));
2171 }
2172
c21443c2
TM		 2173 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2174 if (ret != 0)
2175 goto out;
2176
3efb9722 2177 ctx->state = state;
c45ffdd2
TM		 2178 if (dentry->d_inode == state->inode) {
2179 nfs_inode_attach_open_context(ctx);
2180 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2181 nfs4_schedule_stateid_recovery(server, state);
2182 }
c21443c2
TM		 2183out:
2184 return ret;
2185}
2186
1da177e4 2187/*
24ac23ab 2188 * Returns a referenced nfs4_state
1da177e4 2189 */
82be417a 2190static int _nfs4_do_open(struct inode *dir,
4197a055 2191 struct nfs_open_context *ctx,
82be417a
AA		 2192 int flags,
2193 struct iattr *sattr,
959d921f 2194 struct nfs4_label *label)
1da177e4
LT		 2195{
2196 struct nfs4_state_owner *sp;
2197 struct nfs4_state *state = NULL;
2198 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2199 struct nfs4_opendata *opendata;
4197a055
TM		 2200 struct dentry *dentry = ctx->dentry;
2201 struct rpc_cred *cred = ctx->cred;
2202 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2203 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2204 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2205 struct nfs4_label *olabel = NULL;
aac00a8d 2206 int status;
1da177e4
LT		 2207
2208 /* Protect against reboot recovery conflicts */
1da177e4 2209 status = -ENOMEM;
d1e284d5
TM		 2210 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2211 if (sp == NULL) {
1da177e4
LT		 2212 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2213 goto out_err;
2214 }
58d9714a
TM		 2215 status = nfs4_recover_expired_lease(server);
2216 if (status != 0)
b4454fe1 2217 goto err_put_state_owner;
82a2c1b7
AV		 2218 if (dentry->d_inode != NULL)
2219 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2220 status = -ENOMEM;
49f9a0fa
TM		 2221 if (dentry->d_inode)
2222 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2223 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2224 label, claim, GFP_KERNEL);
e56e0b78 2225 if (opendata == NULL)
95d35cb4 2226 goto err_put_state_owner;
1da177e4 2227
14c43f76
DQ		 2228 if (label) {
2229 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2230 if (IS_ERR(olabel)) {
2231 status = PTR_ERR(olabel);
2232 goto err_opendata_put;
2233 }
2234 }
2235
82be417a
AA		 2236 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2237 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2238 if (!opendata->f_attr.mdsthreshold)
14c43f76 2239 goto err_free_label;
1549210f 2240 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2241 }
82a2c1b7
AV		 2242 if (dentry->d_inode != NULL)
2243 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2244
3efb9722 2245 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2246 if (status != 0)
14c43f76 2247 goto err_free_label;
3efb9722 2248 state = ctx->state;
6168f62c 2249
549b19cc
TM		 2250 if ((opendata->o_arg.open_flags & O_EXCL) &&
2251 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2252 nfs4_exclusive_attrset(opendata, sattr);
2253
2254 nfs_fattr_init(opendata->o_res.f_attr);
2255 status = nfs4_do_setattr(state->inode, cred,
2256 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2257 state, label, olabel);
2258 if (status == 0) {
0ab64e0e 2259 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2260 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2261 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2262 }
0ab64e0e 2263 }
82be417a
AA		 2264
2265 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2266 *ctx_th = opendata->f_attr.mdsthreshold;
2267 else
2268 kfree(opendata->f_attr.mdsthreshold);
2269 opendata->f_attr.mdsthreshold = NULL;
2270
14c43f76
DQ		 2271 nfs4_label_free(olabel);
2272
c6d00e63 2273 nfs4_opendata_put(opendata);
1da177e4 2274 nfs4_put_state_owner(sp);
1da177e4 2275 return 0;
14c43f76
DQ		 2276err_free_label:
2277 nfs4_label_free(olabel);
c6d00e63 2278err_opendata_put:
82be417a 2279 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2280 nfs4_opendata_put(opendata);
e56e0b78
TM		 2281err_put_state_owner:
2282 nfs4_put_state_owner(sp);
1da177e4 2283out_err:
1da177e4
LT		 2284 return status;
2285}
2286
2287
82be417a 2288static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2289 struct nfs_open_context *ctx,
82be417a
AA		 2290 int flags,
2291 struct iattr *sattr,
959d921f 2292 struct nfs4_label *label)
1da177e4 2293{
49f9a0fa 2294 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2295 struct nfs4_exception exception = { };
2296 struct nfs4_state *res;
2297 int status;
2298
2299 do {
959d921f 2300 status = _nfs4_do_open(dir, ctx, flags, sattr, label);
3efb9722 2301 res = ctx->state;
42113a75 2302 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2303 if (status == 0)
2304 break;
2305 /* NOTE: BAD_SEQID means the server and client disagree about the
2306 * book-keeping w.r.t. state-changing operations
2307 * (OPEN/CLOSE/LOCK/LOCKU...)
2308 * It is actually a sign of a bug on the client or on the server.
2309 *
2310 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2311 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2312 * have unhashed the old state_owner for us, and that we can
2313 * therefore safely retry using a new one. We should still warn
2314 * the user though...
2315 */
2316 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2317 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2318 " returned a bad sequence-id error!\n",
2319 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2320 exception.retry = 1;
2321 continue;
2322 }
550f5747
TM		 2323 /*
2324 * BAD_STATEID on OPEN means that the server cancelled our
2325 * state before it received the OPEN_CONFIRM.
2326 * Recover by retrying the request as per the discussion
2327 * on Page 181 of RFC3530.
2328 */
2329 if (status == -NFS4ERR_BAD_STATEID) {
2330 exception.retry = 1;
2331 continue;
2332 }
aac00a8d
TM		 2333 if (status == -EAGAIN) {
2334 /* We must have found a delegation */
2335 exception.retry = 1;
2336 continue;
2337 }
49f9a0fa
TM		 2338 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2339 continue;
2340 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2341 status, &exception));
2342 } while (exception.retry);
2343 return res;
2344}
2345
659bfcd6
TM		 2346static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2347 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2348 struct nfs4_state *state, struct nfs4_label *ilabel,
2349 struct nfs4_label *olabel)
1da177e4 2350{
3e4f6290 2351 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2352 struct nfs_setattrargs arg = {
3e4f6290 2353 .fh = NFS_FH(inode),
1da177e4
LT		 2354 .iap = sattr,
2355 .server = server,
2356 .bitmask = server->attr_bitmask,
1775fd3e 2357 .label = ilabel,
1da177e4
LT		 2358 };
2359 struct nfs_setattrres res = {
2360 .fattr = fattr,
1775fd3e 2361 .label = olabel,
1da177e4
LT		 2362 .server = server,
2363 };
2364 struct rpc_message msg = {
659bfcd6
TM		 2365 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2366 .rpc_argp = &arg,
2367 .rpc_resp = &res,
2368 .rpc_cred = cred,
1da177e4 2369 };
26e976a8 2370 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2371 fmode_t fmode;
2372 bool truncate;
65e4308d 2373 int status;
1da177e4 2374
aa9c2669
DQ		 2375 arg.bitmask = nfs4_bitmask(server, ilabel);
2376 if (ilabel)
2377 arg.bitmask = nfs4_bitmask(server, olabel);
2378
0e574af1 2379 nfs_fattr_init(fattr);
1da177e4 2380
ee3ae84e
TM		 2381 /* Servers should only apply open mode checks for file size changes */
2382 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2383 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2384
2385 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2386 /* Use that stateid */
2387 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2388 struct nfs_lockowner lockowner = {
2389 .l_owner = current->files,
2390 .l_pid = current->tgid,
2391 };
4fc8796d 2392 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2393 &lockowner);
08e9eac4 2394 } else
f597c537 2395 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2396
7c513058 2397 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2398 if (status == 0 && state != NULL)
2399 renew_lease(server, timestamp);
65e4308d 2400 return status;
1da177e4
LT		 2401}
2402
659bfcd6
TM		 2403static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2404 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2405 struct nfs4_state *state, struct nfs4_label *ilabel,
2406 struct nfs4_label *olabel)
1da177e4 2407{
3e4f6290 2408 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2409 struct nfs4_exception exception = {
2410 .state = state,
3114ea7a 2411 .inode = inode,
a1d0b5ee 2412 };
1da177e4
LT		 2413 int err;
2414 do {
1775fd3e 2415 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2416 trace_nfs4_setattr(inode, err);
451146be
TM		 2417 switch (err) {
2418 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2419 if (!(sattr->ia_valid & ATTR_SIZE)) {
2420 pr_warn_once("NFSv4: server %s is incorrectly "
2421 "applying open mode checks to "
2422 "a SETATTR that is not "
2423 "changing file size.\n",
2424 server->nfs_client->cl_hostname);
2425 }
451146be
TM		 2426 if (state && !(state->state & FMODE_WRITE)) {
2427 err = -EBADF;
2428 if (sattr->ia_valid & ATTR_OPEN)
2429 err = -EACCES;
2430 goto out;
2431 }
2432 }
2433 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2434 } while (exception.retry);
451146be 2435out:
1da177e4
LT		 2436 return err;
2437}
2438
2439struct nfs4_closedata {
2440 struct inode *inode;
2441 struct nfs4_state *state;
2442 struct nfs_closeargs arg;
2443 struct nfs_closeres res;
516a6af6 2444 struct nfs_fattr fattr;
26e976a8 2445 unsigned long timestamp;
f7e8917a
FI		 2446 bool roc;
2447 u32 roc_barrier;
1da177e4
LT		 2448};
2449
963d8fe5 2450static void nfs4_free_closedata(void *data)
9512135d 2451{
963d8fe5
TM		 2452 struct nfs4_closedata *calldata = data;
2453 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2454 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2455
f7e8917a
FI		 2456 if (calldata->roc)
2457 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2458 nfs4_put_open_state(calldata->state);
2459 nfs_free_seqid(calldata->arg.seqid);
9512135d 2460 nfs4_put_state_owner(sp);
322b2b90 2461 nfs_sb_deactive(sb);
9512135d
TM		 2462 kfree(calldata);
2463}
2464
88069f77
TM		 2465static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2466 fmode_t fmode)
2467{
2468 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2469 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2470 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2471 case FMODE_WRITE:
88069f77 2472 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2473 break;
2474 case FMODE_READ:
88069f77 2475 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2476 break;
2477 case 0:
2478 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2479 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2480 clear_bit(NFS_OPEN_STATE, &state->flags);
2481 }
88069f77
TM		 2482 spin_unlock(&state->owner->so_lock);
2483}
2484
963d8fe5 2485static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2486{
963d8fe5 2487 struct nfs4_closedata *calldata = data;
1da177e4 2488 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2489 struct nfs_server *server = NFS_SERVER(calldata->inode);
2490
a3ca5651 2491 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2492 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2493 return;
42113a75 2494 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2495 /* hmm. we are done with the inode, and in the process of freeing
2496 * the state_owner. we keep this around to process errors
2497 */
1da177e4
LT		 2498 switch (task->tk_status) {
2499 case 0:
f7e8917a
FI		 2500 if (calldata->roc)
2501 pnfs_roc_set_barrier(state->inode,
2502 calldata->roc_barrier);
45328c35 2503 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2504 renew_lease(server, calldata->timestamp);
88069f77
TM		 2505 nfs4_close_clear_stateid_flags(state,
2506 calldata->arg.fmode);
1da177e4
LT		 2507 break;
2508 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2509 case -NFS4ERR_OLD_STATEID:
2510 case -NFS4ERR_BAD_STATEID:
1da177e4 2511 case -NFS4ERR_EXPIRED:
dc0b027d 2512 if (calldata->arg.fmode == 0)
9e33bed5 2513 break;
1da177e4 2514 default:
72211dbe
TM		 2515 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2516 rpc_restart_call_prepare(task);
1da177e4 2517 }
72211dbe 2518 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2519 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2520 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2521}
2522
4ce70ada 2523static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2524{
4ce70ada 2525 struct nfs4_closedata *calldata = data;
9512135d 2526 struct nfs4_state *state = calldata->state;
7fdab069 2527 struct inode *inode = calldata->inode;
88069f77 2528 int call_close = 0;
9512135d 2529
a3ca5651 2530 dprintk("%s: begin!\n", __func__);
963d8fe5 2531 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2532 goto out_wait;
003707c7 2533
88069f77
TM		 2534 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2535 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2536 spin_lock(&state->owner->so_lock);
003707c7 2537 /* Calculate the change in open mode */
e7616923 2538 if (state->n_rdwr == 0) {
003707c7 2539 if (state->n_rdonly == 0) {
88069f77
TM		 2540 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2541 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2542 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2543 }
2544 if (state->n_wronly == 0) {
88069f77
TM		 2545 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2546 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2547 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2548 }
e7616923 2549 }
5d422301
TM		 2550 if (!nfs4_valid_open_stateid(state))
2551 call_close = 0;
4cecb76f 2552 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2553
2554 if (!call_close) {
963d8fe5 2555 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2556 goto out_no_action;
9512135d 2557 }
88069f77 2558
f7e8917a 2559 if (calldata->arg.fmode == 0) {
88069f77 2560 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2561 if (calldata->roc &&
b9536ad5
AA		 2562 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2563 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2564 goto out_wait;
b9536ad5 2565 }
f7e8917a 2566 }
88069f77 2567
516a6af6 2568 nfs_fattr_init(calldata->res.fattr);
26e976a8 2569 calldata->timestamp = jiffies;
7fdab069 2570 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2571 &calldata->arg.seq_args,
2572 &calldata->res.seq_res,
2240a9e2
TM		 2573 task) != 0)
2574 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2575 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2576 return;
2577out_no_action:
2578 task->tk_action = NULL;
2579out_wait:
2580 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2581}
2582
963d8fe5 2583static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2584 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2585 .rpc_call_done = nfs4_close_done,
2586 .rpc_release = nfs4_free_closedata,
2587};
2588
1da177e4
LT		 2589/*
2590 * It is possible for data to be read/written from a mem-mapped file
2591 * after the sys_close call (which hits the vfs layer as a flush).
2592 * This means that we can't safely call nfsv4 close on a file until
2593 * the inode is cleared. This in turn means that we are not good
2594 * NFSv4 citizens - we do not indicate to the server to update the file's
2595 * share state even when we are done with one of the three share
2596 * stateid's in the inode.
2597 *
2598 * NOTE: Caller must be holding the sp->so_owner semaphore!
2599 */
1f7977c1 2600int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2601{
4a35bd41 2602 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2603 struct nfs4_closedata *calldata;
b39e625b
TM		 2604 struct nfs4_state_owner *sp = state->owner;
2605 struct rpc_task *task;
5138fde0
TM		 2606 struct rpc_message msg = {
2607 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2608 .rpc_cred = state->owner->so_cred,
2609 };
c970aa85
TM		 2610 struct rpc_task_setup task_setup_data = {
2611 .rpc_client = server->client,
5138fde0 2612 .rpc_message = &msg,
c970aa85 2613 .callback_ops = &nfs4_close_ops,
101070ca 2614 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2615 .flags = RPC_TASK_ASYNC,
2616 };
9512135d 2617 int status = -ENOMEM;
1da177e4 2618
fa940720
WAA		 2619 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2620 &task_setup_data.rpc_client, &msg);
2621
8535b2be 2622 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2623 if (calldata == NULL)
9512135d 2624 goto out;
a9c92d6b 2625 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2626 calldata->inode = state->inode;
1da177e4 2627 calldata->state = state;
4a35bd41 2628 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2629 calldata->arg.stateid = &state->open_stateid;
1da177e4 2630 /* Serialization for the sequence id */
8535b2be 2631 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2632 if (calldata->arg.seqid == NULL)
2633 goto out_free_calldata;
dc0b027d 2634 calldata->arg.fmode = 0;
a65318bf 2635 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2636 calldata->res.fattr = &calldata->fattr;
c1d51931 2637 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2638 calldata->res.server = server;
1f7977c1 2639 calldata->roc = pnfs_roc(state->inode);
643168c2 2640 nfs_sb_active(calldata->inode->i_sb);
9512135d 2641
1174dd1f
TM		 2642 msg.rpc_argp = &calldata->arg;
2643 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2644 task_setup_data.callback_data = calldata;
2645 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2646 if (IS_ERR(task))
2647 return PTR_ERR(task);
a49c3c77
TM		 2648 status = 0;
2649 if (wait)
2650 status = rpc_wait_for_completion_task(task);
b39e625b 2651 rpc_put_task(task);
a49c3c77 2652 return status;
9512135d
TM		 2653out_free_calldata:
2654 kfree(calldata);
2655out:
b39e625b
TM		 2656 nfs4_put_open_state(state);
2657 nfs4_put_state_owner(sp);
9512135d 2658 return status;
1da177e4
LT		 2659}
2660
2b484297 2661static struct inode *
cd9a1c0e 2662nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr)
1da177e4 2663{
1da177e4 2664 struct nfs4_state *state;
aa9c2669
DQ		 2665 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2666
2667 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2668
565277f6 2669 /* Protect against concurrent sillydeletes */
959d921f 2670 state = nfs4_do_open(dir, ctx, open_flags, attr, label);
aa9c2669
DQ		 2671
2672 nfs4_label_release_security(label);
2673
f46e0bd3
TM		 2674 if (IS_ERR(state))
2675 return ERR_CAST(state);
275bb307 2676 return state->inode;
1da177e4
LT		 2677}
2678
1185a552 2679static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2680{
2681 if (ctx->state == NULL)
2682 return;
2683 if (is_sync)
643168c2 2684 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2685 else
643168c2 2686 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2687}
1da177e4
LT		 2688
2689static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2690{
43652ad5
BH		 2691 struct nfs4_server_caps_arg args = {
2692 .fhandle = fhandle,
2693 };
1da177e4
LT		 2694 struct nfs4_server_caps_res res = {};
2695 struct rpc_message msg = {
2696 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2697 .rpc_argp = &args,
1da177e4
LT		 2698 .rpc_resp = &res,
2699 };
2700 int status;
2701
7c513058 2702 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2703 if (status == 0) {
2704 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2705 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2706 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2707 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2708 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2709 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2710 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2711 server->caps |= NFS_CAP_ACLS;
2712 if (res.has_links != 0)
2713 server->caps |= NFS_CAP_HARDLINKS;
2714 if (res.has_symlinks != 0)
2715 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2716 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2717 server->caps |= NFS_CAP_FILEID;
2718 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2719 server->caps |= NFS_CAP_MODE;
2720 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2721 server->caps |= NFS_CAP_NLINK;
2722 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2723 server->caps |= NFS_CAP_OWNER;
2724 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2725 server->caps |= NFS_CAP_OWNER_GROUP;
2726 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2727 server->caps |= NFS_CAP_ATIME;
2728 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2729 server->caps |= NFS_CAP_CTIME;
2730 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2731 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2732#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2733 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2734 server->caps |= NFS_CAP_SECURITY_LABEL;
2735#endif
2736 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2737 sizeof(server->attr_bitmask));
62ab460c 2738
aa9c2669
DQ		 2739 if (server->caps & NFS_CAP_SECURITY_LABEL) {
2740 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2741 res.attr_bitmask[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2742 }
a65318bf
TM		 2743 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2744 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2745 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2746 server->acl_bitmask = res.acl_bitmask;
264e6351 2747 server->fh_expire_type = res.fh_expire_type;
1da177e4 2748 }
cccef3b9 2749
1da177e4
LT		 2750 return status;
2751}
2752
55a97593 2753int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2754{
2755 struct nfs4_exception exception = { };
2756 int err;
2757 do {
2758 err = nfs4_handle_exception(server,
2759 _nfs4_server_capabilities(server, fhandle),
2760 &exception);
2761 } while (exception.retry);
2762 return err;
2763}
2764
2765static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2766 struct nfs_fsinfo *info)
2767{
aa9c2669 2768 u32 bitmask[3];
1da177e4 2769 struct nfs4_lookup_root_arg args = {
aa9c2669 2770 .bitmask = bitmask,
1da177e4
LT		 2771 };
2772 struct nfs4_lookup_res res = {
2773 .server = server,
0e574af1 2774 .fattr = info->fattr,
1da177e4
LT		 2775 .fh = fhandle,
2776 };
2777 struct rpc_message msg = {
2778 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2779 .rpc_argp = &args,
2780 .rpc_resp = &res,
2781 };
008f55d0 2782
aa9c2669
DQ		 2783 bitmask[0] = nfs4_fattr_bitmap[0];
2784 bitmask[1] = nfs4_fattr_bitmap[1];
2785 /*
2786 * Process the label in the upcoming getfattr
2787 */
2788 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2789
0e574af1 2790 nfs_fattr_init(info->fattr);
7c513058 2791 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2792}
2793
2794static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2795 struct nfs_fsinfo *info)
2796{
2797 struct nfs4_exception exception = { };
2798 int err;
2799 do {
fb8a5ba8 2800 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2801 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2802 switch (err) {
2803 case 0:
2804 case -NFS4ERR_WRONGSEC:
05e9cfb4 2805 goto out;
fb8a5ba8
BS		 2806 default:
2807 err = nfs4_handle_exception(server, err, &exception);
2808 }
1da177e4 2809 } while (exception.retry);
05e9cfb4 2810out:
1da177e4
LT		 2811 return err;
2812}
2813
8f70e95f
BS		 2814static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2815 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2816{
c2190661
TM		 2817 struct rpc_auth_create_args auth_args = {
2818 .pseudoflavor = flavor,
2819 };
8f70e95f
BS		 2820 struct rpc_auth *auth;
2821 int ret;
2822
c2190661 2823 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 2824 if (IS_ERR(auth)) {
75bc8821 2825 ret = -EACCES;
8f70e95f
BS		 2826 goto out;
2827 }
2828 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2829out:
2830 return ret;
2831}
2832
9a744ba3
CL		 2833/*
2834 * Retry pseudoroot lookup with various security flavors. We do this when:
2835 *
2836 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2837 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2838 *
2839 * Returns zero on success, or a negative NFS4ERR value, or a
2840 * negative errno value.
2841 */
801a16dc 2842static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2843 struct nfs_fsinfo *info)
1da177e4 2844{
9a744ba3
CL		 2845 /* Per 3530bis 15.33.5 */
2846 static const rpc_authflavor_t flav_array[] = {
2847 RPC_AUTH_GSS_KRB5P,
2848 RPC_AUTH_GSS_KRB5I,
2849 RPC_AUTH_GSS_KRB5,
c4eafe11 2850 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2851 RPC_AUTH_NULL,
2852 };
2853 int status = -EPERM;
2854 size_t i;
6a1a1e34 2855
9a744ba3 2856 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2857 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2858 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2859 continue;
2860 break;
8f70e95f 2861 }
9a744ba3 2862
fb8a5ba8
BS		 2863 /*
2864 * -EACCESS could mean that the user doesn't have correct permissions
2865 * to access the mount. It could also mean that we tried to mount
2866 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2867 * existing mount programs don't handle -EACCES very well so it should
2868 * be mapped to -EPERM instead.
2869 */
2870 if (status == -EACCES)
2871 status = -EPERM;
801a16dc
BS		 2872 return status;
2873}
2874
2ed4b95b
CL		 2875static int nfs4_do_find_root_sec(struct nfs_server *server,
2876 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2877{
2878 int mv = server->nfs_client->cl_minorversion;
2879 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2880}
2881
2882/**
2883 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2884 * @server: initialized nfs_server handle
2885 * @fhandle: we fill in the pseudo-fs root file handle
2886 * @info: we fill in an FSINFO struct
5e6b1990 2887 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 2888 *
2889 * Returns zero on success, or a negative errno.
801a16dc 2890 */
3028eb2b 2891int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 2892 struct nfs_fsinfo *info,
2893 bool auth_probe)
801a16dc 2894{
2ed4b95b
CL		 2895 int status;
2896
5e6b1990
TM		 2897 switch (auth_probe) {
2898 case false:
2899 status = nfs4_lookup_root(server, fhandle, info);
2900 if (status != -NFS4ERR_WRONGSEC)
2901 break;
2902 /* Did user force a 'sec=' mount option? */
2903 if (server->flags & NFS_MOUNT_SECFLAVOUR)
2904 break;
2905 default:
2ed4b95b 2906 status = nfs4_do_find_root_sec(server, fhandle, info);
5e6b1990 2907 }
2ed4b95b 2908
1da177e4
LT		 2909 if (status == 0)
2910 status = nfs4_server_capabilities(server, fhandle);
2911 if (status == 0)
2912 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2913
c12e87f4 2914 return nfs4_map_errors(status);
1da177e4
LT		 2915}
2916
bae36241
BS		 2917static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2918 struct nfs_fsinfo *info)
2919{
2920 int error;
2921 struct nfs_fattr *fattr = info->fattr;
1775fd3e 2922 struct nfs4_label *label = NULL;
bae36241
BS		 2923
2924 error = nfs4_server_capabilities(server, mntfh);
2925 if (error < 0) {
2926 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2927 return error;
2928 }
2929
14c43f76
DQ		 2930 label = nfs4_label_alloc(server, GFP_KERNEL);
2931 if (IS_ERR(label))
2932 return PTR_ERR(label);
2933
1775fd3e 2934 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 2935 if (error < 0) {
2936 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 2937 goto err_free_label;
bae36241
BS		 2938 }
2939
2940 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2941 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2942 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2943
14c43f76
DQ		 2944err_free_label:
2945 nfs4_label_free(label);
2946
bae36241
BS		 2947 return error;
2948}
2949
6b97fd3d
MN		 2950/*
2951 * Get locations and (maybe) other attributes of a referral.
2952 * Note that we'll actually follow the referral later when
2953 * we detect fsid mismatch in inode revalidation
2954 */
f05d147f
BS		 2955static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2956 const struct qstr *name, struct nfs_fattr *fattr,
2957 struct nfs_fh *fhandle)
6b97fd3d
MN		 2958{
2959 int status = -ENOMEM;
2960 struct page *page = NULL;
2961 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2962
2963 page = alloc_page(GFP_KERNEL);
2964 if (page == NULL)
2965 goto out;
2966 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2967 if (locations == NULL)
2968 goto out;
2969
f05d147f 2970 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2971 if (status != 0)
2972 goto out;
2973 /* Make sure server returned a different fsid for the referral */
2974 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 2975 dprintk("%s: server did not return a different fsid for"
2976 " a referral at %s\n", __func__, name->name);
6b97fd3d
MN		 2977 status = -EIO;
2978 goto out;
2979 }
533eb461
AA		 2980 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
2981 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 2982
533eb461 2983 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 2984 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 2985 memset(fhandle, 0, sizeof(struct nfs_fh));
2986out:
2987 if (page)
2988 __free_page(page);
5d7ca35a 2989 kfree(locations);
6b97fd3d
MN		 2990 return status;
2991}
2992
1775fd3e
DQ		 2993static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
2994 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 2995{
2996 struct nfs4_getattr_arg args = {
2997 .fh = fhandle,
2998 .bitmask = server->attr_bitmask,
2999 };
3000 struct nfs4_getattr_res res = {
3001 .fattr = fattr,
1775fd3e 3002 .label = label,
1da177e4
LT		 3003 .server = server,
3004 };
3005 struct rpc_message msg = {
3006 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3007 .rpc_argp = &args,
3008 .rpc_resp = &res,
3009 };
aa9c2669
DQ		 3010
3011 args.bitmask = nfs4_bitmask(server, label);
3012
0e574af1 3013 nfs_fattr_init(fattr);
7c513058 3014 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3015}
3016
1775fd3e
DQ		 3017static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3018 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3019{
3020 struct nfs4_exception exception = { };
3021 int err;
3022 do {
b5f875a9
TM		 3023 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3024 trace_nfs4_getattr(server, fhandle, fattr, err);
3025 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3026 &exception);
3027 } while (exception.retry);
3028 return err;
3029}
3030
3031/*
3032 * The file is not closed if it is opened due to the a request to change
3033 * the size of the file. The open call will not be needed once the
3034 * VFS layer lookup-intents are implemented.
3035 *
3036 * Close is called when the inode is destroyed.
3037 * If we haven't opened the file for O_WRONLY, we
3038 * need to in the size_change case to obtain a stateid.
3039 *
3040 * Got race?
3041 * Because OPEN is always done by name in nfsv4, it is
3042 * possible that we opened a different file by the same
3043 * name. We can recognize this race condition, but we
3044 * can't do anything about it besides returning an error.
3045 *
3046 * This will be fixed with VFS changes (lookup-intent).
3047 */
3048static int
3049nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3050 struct iattr *sattr)
3051{
08e9eac4 3052 struct inode *inode = dentry->d_inode;
659bfcd6 3053 struct rpc_cred *cred = NULL;
d530838b 3054 struct nfs4_state *state = NULL;
14c43f76 3055 struct nfs4_label *label = NULL;
1da177e4
LT		 3056 int status;
3057
8a1636c4 3058 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 3059 pnfs_commit_and_return_layout(inode);
8a1636c4 3060
0e574af1 3061 nfs_fattr_init(fattr);
1da177e4 3062
2669940d
AA		 3063 /* Deal with open(O_TRUNC) */
3064 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3065 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3066
3067 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3068 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3069 return 0;
3070
d530838b 3071 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3072 if (sattr->ia_valid & ATTR_FILE) {
3073 struct nfs_open_context *ctx;
3074
3075 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3076 if (ctx) {
3077 cred = ctx->cred;
3078 state = ctx->state;
3079 }
659bfcd6 3080 }
08e9eac4 3081
14c43f76
DQ		 3082 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3083 if (IS_ERR(label))
3084 return PTR_ERR(label);
3085
3086 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3087 if (status == 0) {
65e4308d 3088 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 3089 nfs_setsecurity(inode, fattr, label);
3090 }
14c43f76 3091 nfs4_label_free(label);
1da177e4
LT		 3092 return status;
3093}
3094
0c2e53f1
TM		 3095static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3096 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3097 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3098{
0c2e53f1 3099 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3100 int status;
3101 struct nfs4_lookup_arg args = {
3102 .bitmask = server->attr_bitmask,
0c2e53f1 3103 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3104 .name = name,
3105 };
3106 struct nfs4_lookup_res res = {
3107 .server = server,
3108 .fattr = fattr,
aa9c2669 3109 .label = label,
2b3de441
DH		 3110 .fh = fhandle,
3111 };
3112 struct rpc_message msg = {
3113 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3114 .rpc_argp = &args,
3115 .rpc_resp = &res,
3116 };
3117
aa9c2669
DQ		 3118 args.bitmask = nfs4_bitmask(server, label);
3119
2b3de441
DH		 3120 nfs_fattr_init(fattr);
3121
1da177e4 3122 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3123 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3124 dprintk("NFS reply lookup: %d\n", status);
3125 return status;
3126}
3127
72de53ec 3128static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3129{
7ebb9315 3130 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3131 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3132 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3133 fattr->nlink = 2;
3134}
3135
72de53ec
BS		 3136static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3137 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3138 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3139{
3140 struct nfs4_exception exception = { };
72de53ec 3141 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3142 int err;
3143 do {
1775fd3e 3144 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3145 trace_nfs4_lookup(dir, name, err);
72de53ec 3146 switch (err) {
08ef7bd3 3147 case -NFS4ERR_BADNAME:
72de53ec
BS		 3148 err = -ENOENT;
3149 goto out;
0c2e53f1 3150 case -NFS4ERR_MOVED:
f05d147f 3151 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3152 goto out;
0c2e53f1 3153 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3154 err = -EPERM;
3155 if (client != *clnt)
3156 goto out;
41d058c3
TM		 3157 /* No security negotiation if the user specified 'sec=' */
3158 if (NFS_SERVER(dir)->flags & NFS_MOUNT_SECFLAVOUR)
3159 goto out;
72de53ec
BS		 3160 client = nfs4_create_sec_client(client, dir, name);
3161 if (IS_ERR(client))
3162 return PTR_ERR(client);
3163
3164 exception.retry = 1;
3165 break;
3166 default:
3167 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3168 }
1da177e4 3169 } while (exception.retry);
72de53ec
BS		 3170
3171out:
3172 if (err == 0)
3173 *clnt = client;
3174 else if (client != *clnt)
3175 rpc_shutdown_client(client);
3176
1da177e4
LT		 3177 return err;
3178}
3179
80a16b21 3180static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3181 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3182 struct nfs4_label *label)
72de53ec
BS		 3183{
3184 int status;
3185 struct rpc_clnt *client = NFS_CLIENT(dir);
3186
1775fd3e 3187 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3188 if (client != NFS_CLIENT(dir)) {
3189 rpc_shutdown_client(client);
3190 nfs_fixup_secinfo_attributes(fattr);
3191 }
3192 return status;
3193}
3194
f05d147f
BS		 3195struct rpc_clnt *
3196nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3197 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3198{
b72888cb 3199 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3200 int status;
f05d147f 3201
1775fd3e 3202 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3203 if (status < 0)
f05d147f 3204 return ERR_PTR(status);
b72888cb 3205 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3206}
3207
1da177e4
LT		 3208static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3209{
76b32999 3210 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3211 struct nfs4_accessargs args = {
3212 .fh = NFS_FH(inode),
a4980e78 3213 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3214 };
3215 struct nfs4_accessres res = {
3216 .server = server,
1da177e4 3217 };
1da177e4
LT		 3218 struct rpc_message msg = {
3219 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3220 .rpc_argp = &args,
3221 .rpc_resp = &res,
3222 .rpc_cred = entry->cred,
3223 };
3224 int mode = entry->mask;
aa9c2669 3225 int status = 0;
1da177e4
LT		 3226
3227 /*
3228 * Determine which access bits we want to ask for...
3229 */
3230 if (mode & MAY_READ)
3231 args.access |= NFS4_ACCESS_READ;
3232 if (S_ISDIR(inode->i_mode)) {
3233 if (mode & MAY_WRITE)
3234 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3235 if (mode & MAY_EXEC)
3236 args.access |= NFS4_ACCESS_LOOKUP;
3237 } else {
3238 if (mode & MAY_WRITE)
3239 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3240 if (mode & MAY_EXEC)
3241 args.access |= NFS4_ACCESS_EXECUTE;
3242 }
c407d41a
TM		 3243
3244 res.fattr = nfs_alloc_fattr();
3245 if (res.fattr == NULL)
3246 return -ENOMEM;
3247
7c513058 3248 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3249 if (!status) {
6168f62c 3250 nfs_access_set_mask(entry, res.access);
c407d41a 3251 nfs_refresh_inode(inode, res.fattr);
1da177e4 3252 }
c407d41a 3253 nfs_free_fattr(res.fattr);
1da177e4
LT		 3254 return status;
3255}
3256
3257static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3258{
3259 struct nfs4_exception exception = { };
3260 int err;
3261 do {
c1578b76
TM		 3262 err = _nfs4_proc_access(inode, entry);
3263 trace_nfs4_access(inode, err);
3264 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3265 &exception);
3266 } while (exception.retry);
3267 return err;
3268}
3269
3270/*
3271 * TODO: For the time being, we don't try to get any attributes
3272 * along with any of the zero-copy operations READ, READDIR,
3273 * READLINK, WRITE.
3274 *
3275 * In the case of the first three, we want to put the GETATTR
3276 * after the read-type operation -- this is because it is hard
3277 * to predict the length of a GETATTR response in v4, and thus
3278 * align the READ data correctly. This means that the GETATTR
3279 * may end up partially falling into the page cache, and we should
3280 * shift it into the 'tail' of the xdr_buf before processing.
3281 * To do this efficiently, we need to know the total length
3282 * of data received, which doesn't seem to be available outside
3283 * of the RPC layer.
3284 *
3285 * In the case of WRITE, we also want to put the GETATTR after
3286 * the operation -- in this case because we want to make sure
140150db 3287 * we get the post-operation mtime and size.
1da177e4
LT		 3288 *
3289 * Both of these changes to the XDR layer would in fact be quite
3290 * minor, but I decided to leave them for a subsequent patch.
3291 */
3292static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3293 unsigned int pgbase, unsigned int pglen)
3294{
3295 struct nfs4_readlink args = {
3296 .fh = NFS_FH(inode),
3297 .pgbase = pgbase,
3298 .pglen = pglen,
3299 .pages = &page,
3300 };
f50c7000 3301 struct nfs4_readlink_res res;
1da177e4
LT		 3302 struct rpc_message msg = {
3303 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3304 .rpc_argp = &args,
f50c7000 3305 .rpc_resp = &res,
1da177e4
LT		 3306 };
3307
7c513058 3308 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3309}
3310
3311static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3312 unsigned int pgbase, unsigned int pglen)
3313{
3314 struct nfs4_exception exception = { };
3315 int err;
3316 do {
c1578b76
TM		 3317 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3318 trace_nfs4_readlink(inode, err);
3319 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3320 &exception);
3321 } while (exception.retry);
3322 return err;
3323}
3324
1da177e4 3325/*
8867fe58 3326 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3327 */
1da177e4
LT		 3328static int
3329nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3330 int flags)
1da177e4 3331{
aa9c2669 3332 struct nfs4_label l, *ilabel = NULL;
8867fe58 3333 struct nfs_open_context *ctx;
1da177e4 3334 struct nfs4_state *state;
1da177e4
LT		 3335 int status = 0;
3336
8867fe58
MS		 3337 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3338 if (IS_ERR(ctx))
3339 return PTR_ERR(ctx);
3340
aa9c2669
DQ		 3341 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3342
a8a5da99 3343 sattr->ia_mode &= ~current_umask();
959d921f 3344 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel);
1da177e4
LT		 3345 if (IS_ERR(state)) {
3346 status = PTR_ERR(state);
c0204fd2 3347 goto out;
1da177e4 3348 }
1da177e4 3349out:
aa9c2669 3350 nfs4_label_release_security(ilabel);
8867fe58 3351 put_nfs_open_context(ctx);
1da177e4
LT		 3352 return status;
3353}
3354
3355static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3356{
16e42959 3357 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3358 struct nfs_removeargs args = {
1da177e4 3359 .fh = NFS_FH(dir),
26fe5750 3360 .name = *name,
16e42959 3361 };
4fdc17b2 3362 struct nfs_removeres res = {
16e42959 3363 .server = server,
1da177e4 3364 };
1da177e4 3365 struct rpc_message msg = {
4fdc17b2
TM		 3366 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3367 .rpc_argp = &args,
3368 .rpc_resp = &res,
1da177e4 3369 };
778d2817 3370 int status;
1da177e4 3371
7c513058 3372 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3373 if (status == 0)
16e42959 3374 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3375 return status;
3376}
3377
3378static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3379{
3380 struct nfs4_exception exception = { };
3381 int err;
3382 do {
078ea3df
TM		 3383 err = _nfs4_proc_remove(dir, name);
3384 trace_nfs4_remove(dir, name, err);
3385 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3386 &exception);
3387 } while (exception.retry);
3388 return err;
3389}
3390
e4eff1a6 3391static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3392{
e4eff1a6
TM		 3393 struct nfs_server *server = NFS_SERVER(dir);
3394 struct nfs_removeargs *args = msg->rpc_argp;
3395 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3396
e4eff1a6 3397 res->server = server;
1da177e4 3398 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3399 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3400
3401 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3402}
3403
34e137cc
BS		 3404static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3405{
d9afbd1b
TM		 3406 nfs4_setup_sequence(NFS_SERVER(data->dir),
3407 &data->args.seq_args,
3408 &data->res.seq_res,
3409 task);
1da177e4
LT		 3410}
3411
e4eff1a6 3412static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3413{
078ea3df
TM		 3414 struct nfs_unlinkdata *data = task->tk_calldata;
3415 struct nfs_removeres *res = &data->res;
e4eff1a6 3416
14516c3a
TM		 3417 if (!nfs4_sequence_done(task, &res->seq_res))
3418 return 0;
9e33bed5 3419 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3420 return 0;
3421 update_changeattr(dir, &res->cinfo);
e4eff1a6 3422 return 1;
1da177e4
LT		 3423}
3424
d3d4152a
JL		 3425static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3426{
3427 struct nfs_server *server = NFS_SERVER(dir);
3428 struct nfs_renameargs *arg = msg->rpc_argp;
3429 struct nfs_renameres *res = msg->rpc_resp;
3430
3431 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3432 res->server = server;
a9c92d6b 3433 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3434}
3435
c6bfa1a1
BS		 3436static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3437{
d9afbd1b
TM		 3438 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3439 &data->args.seq_args,
3440 &data->res.seq_res,
3441 task);
d3d4152a
JL		 3442}
3443
3444static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3445 struct inode *new_dir)
3446{
fbc6f7c2
TM		 3447 struct nfs_renamedata *data = task->tk_calldata;
3448 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3449
3450 if (!nfs4_sequence_done(task, &res->seq_res))
3451 return 0;
3452 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3453 return 0;
3454
3455 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3456 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3457 return 1;
3458}
3459
1da177e4
LT		 3460static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3461 struct inode *new_dir, struct qstr *new_name)
3462{
6caf2c82 3463 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3464 struct nfs_renameargs arg = {
1da177e4
LT		 3465 .old_dir = NFS_FH(old_dir),
3466 .new_dir = NFS_FH(new_dir),
3467 .old_name = old_name,
3468 .new_name = new_name,
6caf2c82 3469 };
e8582a8b 3470 struct nfs_renameres res = {
6caf2c82 3471 .server = server,
1da177e4 3472 };
1da177e4
LT		 3473 struct rpc_message msg = {
3474 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3475 .rpc_argp = &arg,
3476 .rpc_resp = &res,
3477 };
011fff72 3478 int status = -ENOMEM;
14c43f76 3479
7c513058 3480 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3481 if (!status) {
3482 update_changeattr(old_dir, &res.old_cinfo);
3483 update_changeattr(new_dir, &res.new_cinfo);
3484 }
3485 return status;
3486}
3487
3488static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3489 struct inode *new_dir, struct qstr *new_name)
3490{
3491 struct nfs4_exception exception = { };
3492 int err;
3493 do {
fbc6f7c2
TM		 3494 err = _nfs4_proc_rename(old_dir, old_name,
3495 new_dir, new_name);
3496 trace_nfs4_rename(old_dir, old_name, new_dir, new_name, err);
3497 err = nfs4_handle_exception(NFS_SERVER(old_dir), err,
1da177e4
LT		 3498 &exception);
3499 } while (exception.retry);
3500 return err;
3501}
3502
3503static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3504{
91ba2eee 3505 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3506 struct nfs4_link_arg arg = {
3507 .fh = NFS_FH(inode),
3508 .dir_fh = NFS_FH(dir),
3509 .name = name,
91ba2eee
TM		 3510 .bitmask = server->attr_bitmask,
3511 };
91ba2eee
TM		 3512 struct nfs4_link_res res = {
3513 .server = server,
1775fd3e 3514 .label = NULL,
1da177e4 3515 };
1da177e4
LT		 3516 struct rpc_message msg = {
3517 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3518 .rpc_argp = &arg,
91ba2eee 3519 .rpc_resp = &res,
1da177e4 3520 };
136f2627
TM		 3521 int status = -ENOMEM;
3522
3523 res.fattr = nfs_alloc_fattr();
778d2817 3524 if (res.fattr == NULL)
136f2627 3525 goto out;
1da177e4 3526
14c43f76
DQ		 3527 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3528 if (IS_ERR(res.label)) {
3529 status = PTR_ERR(res.label);
3530 goto out;
3531 }
aa9c2669 3532 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3533
7c513058 3534 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3535 if (!status) {
3536 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3537 status = nfs_post_op_update_inode(inode, res.fattr);
3538 if (!status)
3539 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3540 }
14c43f76
DQ		 3541
3542
3543 nfs4_label_free(res.label);
3544
136f2627 3545out:
136f2627 3546 nfs_free_fattr(res.fattr);
1da177e4
LT		 3547 return status;
3548}
3549
3550static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3551{
3552 struct nfs4_exception exception = { };
3553 int err;
3554 do {
3555 err = nfs4_handle_exception(NFS_SERVER(inode),
3556 _nfs4_proc_link(inode, dir, name),
3557 &exception);
3558 } while (exception.retry);
3559 return err;
3560}
3561
57dc9a57
TM		 3562struct nfs4_createdata {
3563 struct rpc_message msg;
3564 struct nfs4_create_arg arg;
3565 struct nfs4_create_res res;
3566 struct nfs_fh fh;
3567 struct nfs_fattr fattr;
1775fd3e 3568 struct nfs4_label *label;
57dc9a57
TM		 3569};
3570
3571static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3572 struct qstr *name, struct iattr *sattr, u32 ftype)
3573{
3574 struct nfs4_createdata *data;
3575
3576 data = kzalloc(sizeof(*data), GFP_KERNEL);
3577 if (data != NULL) {
3578 struct nfs_server *server = NFS_SERVER(dir);
3579
14c43f76
DQ		 3580 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3581 if (IS_ERR(data->label))
3582 goto out_free;
3583
57dc9a57
TM		 3584 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3585 data->msg.rpc_argp = &data->arg;
3586 data->msg.rpc_resp = &data->res;
3587 data->arg.dir_fh = NFS_FH(dir);
3588 data->arg.server = server;
3589 data->arg.name = name;
3590 data->arg.attrs = sattr;
3591 data->arg.ftype = ftype;
aa9c2669 3592 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3593 data->res.server = server;
3594 data->res.fh = &data->fh;
3595 data->res.fattr = &data->fattr;
1775fd3e 3596 data->res.label = data->label;
57dc9a57 3597 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3598 }
3599 return data;
14c43f76
DQ		 3600out_free:
3601 kfree(data);
3602 return NULL;
57dc9a57
TM		 3603}
3604
3605static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3606{
7c513058 3607 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3608 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3609 if (status == 0) {
3610 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3611 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3612 }
3613 return status;
3614}
3615
3616static void nfs4_free_createdata(struct nfs4_createdata *data)
3617{
14c43f76 3618 nfs4_label_free(data->label);
57dc9a57
TM		 3619 kfree(data);
3620}
3621
4f390c15 3622static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3623 struct page *page, unsigned int len, struct iattr *sattr,
3624 struct nfs4_label *label)
1da177e4 3625{
57dc9a57
TM		 3626 struct nfs4_createdata *data;
3627 int status = -ENAMETOOLONG;
1da177e4 3628
94a6d753 3629 if (len > NFS4_MAXPATHLEN)
57dc9a57 3630 goto out;
4f390c15 3631
57dc9a57
TM		 3632 status = -ENOMEM;
3633 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3634 if (data == NULL)
3635 goto out;
3636
3637 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3638 data->arg.u.symlink.pages = &page;
3639 data->arg.u.symlink.len = len;
1775fd3e 3640 data->arg.label = label;
1da177e4 3641
57dc9a57
TM		 3642 status = nfs4_do_create(dir, dentry, data);
3643
3644 nfs4_free_createdata(data);
3645out:
1da177e4
LT		 3646 return status;
3647}
3648
4f390c15 3649static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3650 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3651{
3652 struct nfs4_exception exception = { };
aa9c2669 3653 struct nfs4_label l, *label = NULL;
1da177e4 3654 int err;
aa9c2669
DQ		 3655
3656 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3657
1da177e4 3658 do {
078ea3df
TM		 3659 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3660 trace_nfs4_symlink(dir, &dentry->d_name, err);
3661 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3662 &exception);
3663 } while (exception.retry);
aa9c2669
DQ		 3664
3665 nfs4_label_release_security(label);
1da177e4
LT		 3666 return err;
3667}
3668
3669static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3670 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3671{
57dc9a57
TM		 3672 struct nfs4_createdata *data;
3673 int status = -ENOMEM;
1da177e4 3674
57dc9a57
TM		 3675 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3676 if (data == NULL)
3677 goto out;
3678
1775fd3e 3679 data->arg.label = label;
57dc9a57
TM		 3680 status = nfs4_do_create(dir, dentry, data);
3681
3682 nfs4_free_createdata(data);
3683out:
1da177e4
LT		 3684 return status;
3685}
3686
3687static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3688 struct iattr *sattr)
3689{
3690 struct nfs4_exception exception = { };
aa9c2669 3691 struct nfs4_label l, *label = NULL;
1da177e4 3692 int err;
a8a5da99 3693
aa9c2669
DQ		 3694 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3695
a8a5da99 3696 sattr->ia_mode &= ~current_umask();
1da177e4 3697 do {
078ea3df
TM		 3698 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3699 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3700 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3701 &exception);
3702 } while (exception.retry);
aa9c2669
DQ		 3703 nfs4_label_release_security(label);
3704
1da177e4
LT		 3705 return err;
3706}
3707
3708static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3709 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3710{
3711 struct inode *dir = dentry->d_inode;
3712 struct nfs4_readdir_arg args = {
3713 .fh = NFS_FH(dir),
56e4ebf8 3714 .pages = pages,
1da177e4
LT		 3715 .pgbase = 0,
3716 .count = count,
96d25e53 3717 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3718 .plus = plus,
1da177e4
LT		 3719 };
3720 struct nfs4_readdir_res res;
3721 struct rpc_message msg = {
3722 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3723 .rpc_argp = &args,
3724 .rpc_resp = &res,
3725 .rpc_cred = cred,
3726 };
3727 int status;
3728
3110ff80 3729 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3730 dentry->d_parent->d_name.name,
3731 dentry->d_name.name,
3732 (unsigned long long)cookie);
c3f52af3 3733 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3734 res.pgbase = args.pgbase;
7c513058 3735 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3736 if (status >= 0) {
c3f52af3 3737 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3738 status += args.pgbase;
3739 }
c4812998
TM		 3740
3741 nfs_invalidate_atime(dir);
3742
3110ff80 3743 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3744 return status;
3745}
3746
3747static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3748 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3749{
3750 struct nfs4_exception exception = { };
3751 int err;
3752 do {
c1578b76
TM		 3753 err = _nfs4_proc_readdir(dentry, cred, cookie,
3754 pages, count, plus);
3755 trace_nfs4_readdir(dentry->d_inode, err);
3756 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3757 &exception);
3758 } while (exception.retry);
3759 return err;
3760}
3761
3762static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3763 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3764{
57dc9a57
TM		 3765 struct nfs4_createdata *data;
3766 int mode = sattr->ia_mode;
3767 int status = -ENOMEM;
1da177e4 3768
57dc9a57
TM		 3769 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3770 if (data == NULL)
3771 goto out;
3772
1da177e4 3773 if (S_ISFIFO(mode))
57dc9a57 3774 data->arg.ftype = NF4FIFO;
1da177e4 3775 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3776 data->arg.ftype = NF4BLK;
3777 data->arg.u.device.specdata1 = MAJOR(rdev);
3778 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3779 }
3780 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3781 data->arg.ftype = NF4CHR;
3782 data->arg.u.device.specdata1 = MAJOR(rdev);
3783 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3784 } else if (!S_ISSOCK(mode)) {
3785 status = -EINVAL;
3786 goto out_free;
1da177e4 3787 }
1775fd3e 3788
aa9c2669 3789 data->arg.label = label;
57dc9a57 3790 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3791out_free:
57dc9a57
TM		 3792 nfs4_free_createdata(data);
3793out:
1da177e4
LT		 3794 return status;
3795}
3796
3797static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3798 struct iattr *sattr, dev_t rdev)
3799{
3800 struct nfs4_exception exception = { };
aa9c2669 3801 struct nfs4_label l, *label = NULL;
1da177e4 3802 int err;
a8a5da99 3803
aa9c2669
DQ		 3804 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3805
a8a5da99 3806 sattr->ia_mode &= ~current_umask();
1da177e4 3807 do {
078ea3df
TM		 3808 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3809 trace_nfs4_mknod(dir, &dentry->d_name, err);
3810 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3811 &exception);
3812 } while (exception.retry);
aa9c2669
DQ		 3813
3814 nfs4_label_release_security(label);
3815
1da177e4
LT		 3816 return err;
3817}
3818
3819static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3820 struct nfs_fsstat *fsstat)
3821{
3822 struct nfs4_statfs_arg args = {
3823 .fh = fhandle,
3824 .bitmask = server->attr_bitmask,
3825 };
24ad148a
BH		 3826 struct nfs4_statfs_res res = {
3827 .fsstat = fsstat,
3828 };
1da177e4
LT		 3829 struct rpc_message msg = {
3830 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3831 .rpc_argp = &args,
24ad148a 3832 .rpc_resp = &res,
1da177e4
LT		 3833 };
3834
0e574af1 3835 nfs_fattr_init(fsstat->fattr);
7c513058 3836 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3837}
3838
3839static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3840{
3841 struct nfs4_exception exception = { };
3842 int err;
3843 do {
3844 err = nfs4_handle_exception(server,
3845 _nfs4_proc_statfs(server, fhandle, fsstat),
3846 &exception);
3847 } while (exception.retry);
3848 return err;
3849}
3850
3851static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3852 struct nfs_fsinfo *fsinfo)
3853{
3854 struct nfs4_fsinfo_arg args = {
3855 .fh = fhandle,
3856 .bitmask = server->attr_bitmask,
3857 };
3dda5e43
BH		 3858 struct nfs4_fsinfo_res res = {
3859 .fsinfo = fsinfo,
3860 };
1da177e4
LT		 3861 struct rpc_message msg = {
3862 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3863 .rpc_argp = &args,
3dda5e43 3864 .rpc_resp = &res,
1da177e4
LT		 3865 };
3866
7c513058 3867 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3868}
3869
3870static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3871{
3872 struct nfs4_exception exception = { };
83ca7f5a 3873 unsigned long now = jiffies;
1da177e4
LT		 3874 int err;
3875
3876 do {
83ca7f5a 3877 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 3878 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 3879 if (err == 0) {
3880 struct nfs_client *clp = server->nfs_client;
3881
3882 spin_lock(&clp->cl_lock);
3883 clp->cl_lease_time = fsinfo->lease_time * HZ;
3884 clp->cl_last_renewal = now;
3885 spin_unlock(&clp->cl_lock);
3886 break;
3887 }
3888 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3889 } while (exception.retry);
3890 return err;
3891}
3892
3893static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3894{
e38eb650
BS		 3895 int error;
3896
0e574af1 3897 nfs_fattr_init(fsinfo->fattr);
e38eb650 3898 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3899 if (error == 0) {
3900 /* block layout checks this! */
3901 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3902 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3903 }
e38eb650
BS		 3904
3905 return error;
1da177e4
LT		 3906}
3907
3908static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3909 struct nfs_pathconf *pathconf)
3910{
3911 struct nfs4_pathconf_arg args = {
3912 .fh = fhandle,
3913 .bitmask = server->attr_bitmask,
3914 };
d45b2989
BH		 3915 struct nfs4_pathconf_res res = {
3916 .pathconf = pathconf,
3917 };
1da177e4
LT		 3918 struct rpc_message msg = {
3919 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3920 .rpc_argp = &args,
d45b2989 3921 .rpc_resp = &res,
1da177e4
LT		 3922 };
3923
3924 /* None of the pathconf attributes are mandatory to implement */
3925 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3926 memset(pathconf, 0, sizeof(*pathconf));
3927 return 0;
3928 }
3929
0e574af1 3930 nfs_fattr_init(pathconf->fattr);
7c513058 3931 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3932}
3933
3934static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3935 struct nfs_pathconf *pathconf)
3936{
3937 struct nfs4_exception exception = { };
3938 int err;
3939
3940 do {
3941 err = nfs4_handle_exception(server,
3942 _nfs4_proc_pathconf(server, fhandle, pathconf),
3943 &exception);
3944 } while (exception.retry);
3945 return err;
3946}
3947
5521abfd 3948int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3949 const struct nfs_open_context *ctx,
3950 const struct nfs_lock_context *l_ctx,
3951 fmode_t fmode)
3952{
3953 const struct nfs_lockowner *lockowner = NULL;
3954
3955 if (l_ctx != NULL)
3956 lockowner = &l_ctx->lockowner;
5521abfd 3957 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3958}
3959EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3960
5521abfd
TM		 3961static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3962 const struct nfs_open_context *ctx,
3963 const struct nfs_lock_context *l_ctx,
3964 fmode_t fmode)
3965{
3966 nfs4_stateid current_stateid;
3967
3968 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3969 return false;
3970 return nfs4_stateid_match(stateid, &current_stateid);
3971}
3972
3973static bool nfs4_error_stateid_expired(int err)
3974{
3975 switch (err) {
3976 case -NFS4ERR_DELEG_REVOKED:
3977 case -NFS4ERR_ADMIN_REVOKED:
3978 case -NFS4ERR_BAD_STATEID:
3979 case -NFS4ERR_STALE_STATEID:
3980 case -NFS4ERR_OLD_STATEID:
3981 case -NFS4ERR_OPENMODE:
3982 case -NFS4ERR_EXPIRED:
3983 return true;
3984 }
3985 return false;
3986}
3987
d20581aa
BH		 3988void __nfs4_read_done_cb(struct nfs_read_data *data)
3989{
cd841605 3990 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 3991}
3992
cbdabc7f 3993static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 3994{
cd841605 3995 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 3996
cc668ab3 3997 trace_nfs4_read(data, task->tk_status);
9e33bed5 3998 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 3999 rpc_restart_call_prepare(task);
ec06c096 4000 return -EAGAIN;
1da177e4 4001 }
8850df99 4002
d20581aa 4003 __nfs4_read_done_cb(data);
1da177e4 4004 if (task->tk_status > 0)
ec06c096
TM		 4005 renew_lease(server, data->timestamp);
4006 return 0;
1da177e4
LT		 4007}
4008
5521abfd
TM		 4009static bool nfs4_read_stateid_changed(struct rpc_task *task,
4010 struct nfs_readargs *args)
4011{
4012
4013 if (!nfs4_error_stateid_expired(task->tk_status) ||
4014 nfs4_stateid_is_current(&args->stateid,
4015 args->context,
4016 args->lock_context,
4017 FMODE_READ))
4018 return false;
4019 rpc_restart_call_prepare(task);
4020 return true;
4021}
4022
cbdabc7f
AA		 4023static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
4024{
4025
4026 dprintk("--> %s\n", __func__);
4027
4028 if (!nfs4_sequence_done(task, &data->res.seq_res))
4029 return -EAGAIN;
5521abfd
TM		 4030 if (nfs4_read_stateid_changed(task, &data->args))
4031 return -EAGAIN;
d20581aa
BH		 4032 return data->read_done_cb ? data->read_done_cb(task, data) :
4033 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 4034}
4035
bdc7f021 4036static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 4037{
1da177e4 4038 data->timestamp = jiffies;
cbdabc7f 4039 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 4040 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
a9c92d6b 4041 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 4042}
4043
ef1820f9 4044static int nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
ea7c3303 4045{
9b206149 4046 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4047 &data->args.seq_args,
4048 &data->res.seq_res,
9b206149 4049 task))
ef1820f9
N		 4050 return 0;
4051 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4052 data->args.lock_context, FMODE_READ) == -EIO)
4053 return -EIO;
4054 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4055 return -EIO;
4056 return 0;
1da177e4
LT		 4057}
4058
b029bc9b 4059static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 4060{
cd841605 4061 struct inode *inode = data->header->inode;
1da177e4 4062
cc668ab3 4063 trace_nfs4_write(data, task->tk_status);
9e33bed5 4064 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 4065 rpc_restart_call_prepare(task);
788e7a89 4066 return -EAGAIN;
1da177e4 4067 }
4f9838c7 4068 if (task->tk_status >= 0) {
1da177e4 4069 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 4070 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 4071 }
788e7a89 4072 return 0;
1da177e4
LT		 4073}
4074
5521abfd
TM		 4075static bool nfs4_write_stateid_changed(struct rpc_task *task,
4076 struct nfs_writeargs *args)
4077{
4078
4079 if (!nfs4_error_stateid_expired(task->tk_status) ||
4080 nfs4_stateid_is_current(&args->stateid,
4081 args->context,
4082 args->lock_context,
4083 FMODE_WRITE))
4084 return false;
4085 rpc_restart_call_prepare(task);
4086 return true;
4087}
4088
b029bc9b
FI		 4089static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
4090{
4091 if (!nfs4_sequence_done(task, &data->res.seq_res))
4092 return -EAGAIN;
5521abfd
TM		 4093 if (nfs4_write_stateid_changed(task, &data->args))
4094 return -EAGAIN;
d20581aa
BH		 4095 return data->write_done_cb ? data->write_done_cb(task, data) :
4096 nfs4_write_done_cb(task, data);
b029bc9b
FI		 4097}
4098
5a37f851
TM		 4099static
4100bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 4101{
5a37f851
TM		 4102 const struct nfs_pgio_header *hdr = data->header;
4103
4104 /* Don't request attributes for pNFS or O_DIRECT writes */
4105 if (data->ds_clp != NULL || hdr->dreq != NULL)
4106 return false;
4107 /* Otherwise, request attributes if and only if we don't hold
4108 * a delegation
4109 */
011e2a7f 4110 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4111}
a69aef14 4112
bdc7f021 4113static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 4114{
cd841605 4115 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 4116
5a37f851 4117 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 4118 data->args.bitmask = NULL;
4119 data->res.fattr = NULL;
4120 } else
4121 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4122
b029bc9b
FI		 4123 if (!data->write_done_cb)
4124 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 4125 data->res.server = server;
1da177e4
LT		 4126 data->timestamp = jiffies;
4127
bdc7f021 4128 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
a9c92d6b 4129 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4130}
4131
ef1820f9 4132static int nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
c6cb80d0 4133{
9b206149 4134 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4135 &data->args.seq_args,
4136 &data->res.seq_res,
9b206149 4137 task))
ef1820f9
N		 4138 return 0;
4139 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4140 data->args.lock_context, FMODE_WRITE) == -EIO)
4141 return -EIO;
4142 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4143 return -EIO;
4144 return 0;
1da177e4
LT		 4145}
4146
0b7c0153 4147static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4148{
d9afbd1b
TM		 4149 nfs4_setup_sequence(NFS_SERVER(data->inode),
4150 &data->args.seq_args,
4151 &data->res.seq_res,
4152 task);
1da177e4
LT		 4153}
4154
0b7c0153 4155static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4156{
1da177e4 4157 struct inode *inode = data->inode;
14516c3a 4158
cc668ab3 4159 trace_nfs4_commit(data, task->tk_status);
9e33bed5 4160 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 4161 rpc_restart_call_prepare(task);
788e7a89 4162 return -EAGAIN;
1da177e4 4163 }
788e7a89 4164 return 0;
1da177e4
LT		 4165}
4166
0b7c0153 4167static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4168{
4169 if (!nfs4_sequence_done(task, &data->res.seq_res))
4170 return -EAGAIN;
0b7c0153 4171 return data->commit_done_cb(task, data);
5f452431
FI		 4172}
4173
0b7c0153 4174static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4175{
788e7a89 4176 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4177
0b7c0153
FI		 4178 if (data->commit_done_cb == NULL)
4179 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4180 data->res.server = server;
bdc7f021 4181 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4182 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4183}
4184
9bc4e3ca
CL		 4185struct nfs4_renewdata {
4186 struct nfs_client *client;
4187 unsigned long timestamp;
4188};
4189
1da177e4
LT		 4190/*
4191 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4192 * standalone procedure for queueing an asynchronous RENEW.
4193 */
9bc4e3ca 4194static void nfs4_renew_release(void *calldata)
dc96aef9 4195{
9bc4e3ca
CL		 4196 struct nfs4_renewdata *data = calldata;
4197 struct nfs_client *clp = data->client;
dc96aef9 4198
0851de06
AB		 4199 if (atomic_read(&clp->cl_count) > 1)
4200 nfs4_schedule_state_renewal(clp);
4201 nfs_put_client(clp);
9bc4e3ca 4202 kfree(data);
dc96aef9
AB		 4203}
4204
9bc4e3ca 4205static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4206{
9bc4e3ca
CL		 4207 struct nfs4_renewdata *data = calldata;
4208 struct nfs_client *clp = data->client;
4209 unsigned long timestamp = data->timestamp;
1da177e4 4210
c6d01c6f 4211 trace_nfs4_renew_async(clp, task->tk_status);
1da177e4 4212 if (task->tk_status < 0) {
95baa25c 4213 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4214 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4215 return;
4216 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4217 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4218 return;
4219 }
4220 nfs4_schedule_path_down_recovery(clp);
1da177e4 4221 }
452e9352 4222 do_renew_lease(clp, timestamp);
1da177e4
LT		 4223}
4224
963d8fe5
TM		 4225static const struct rpc_call_ops nfs4_renew_ops = {
4226 .rpc_call_done = nfs4_renew_done,
dc96aef9 4227 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4228};
4229
2f60ea6b 4230static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4231{
4232 struct rpc_message msg = {
4233 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4234 .rpc_argp = clp,
b4454fe1 4235 .rpc_cred = cred,
1da177e4 4236 };
9bc4e3ca 4237 struct nfs4_renewdata *data;
1da177e4 4238
2f60ea6b
TM		 4239 if (renew_flags == 0)
4240 return 0;
0851de06
AB		 4241 if (!atomic_inc_not_zero(&clp->cl_count))
4242 return -EIO;
b569ad34 4243 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4244 if (data == NULL)
4245 return -ENOMEM;
4246 data->client = clp;
4247 data->timestamp = jiffies;
bc7a05ca 4248 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4249 &nfs4_renew_ops, data);
1da177e4
LT		 4250}
4251
8534d4ec 4252static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4253{
4254 struct rpc_message msg = {
4255 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4256 .rpc_argp = clp,
b4454fe1 4257 .rpc_cred = cred,
1da177e4
LT		 4258 };
4259 unsigned long now = jiffies;
4260 int status;
4261
bc7a05ca 4262 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4263 if (status < 0)
4264 return status;
452e9352 4265 do_renew_lease(clp, now);
1da177e4
LT		 4266 return 0;
4267}
4268
aa1870af
BF		 4269static inline int nfs4_server_supports_acls(struct nfs_server *server)
4270{
4271 return (server->caps & NFS_CAP_ACLS)
4272 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
4273 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
4274}
4275
21f498c2
TM		 4276/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4277 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4278 * the stack.
4279 */
21f498c2 4280#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4281
e9e3d724
NH		 4282static int buf_to_pages_noslab(const void *buf, size_t buflen,
4283 struct page **pages, unsigned int *pgbase)
4284{
4285 struct page *newpage, **spages;
4286 int rc = 0;
4287 size_t len;
4288 spages = pages;
4289
4290 do {
21f498c2 4291 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4292 newpage = alloc_page(GFP_KERNEL);
4293
4294 if (newpage == NULL)
4295 goto unwind;
4296 memcpy(page_address(newpage), buf, len);
4297 buf += len;
4298 buflen -= len;
4299 *pages++ = newpage;
4300 rc++;
4301 } while (buflen != 0);
4302
4303 return rc;
4304
4305unwind:
4306 for(; rc > 0; rc--)
4307 __free_page(spages[rc-1]);
4308 return -ENOMEM;
4309}
4310
e50a1c2e
BF		 4311struct nfs4_cached_acl {
4312 int cached;
4313 size_t len;
3e9d4154 4314 char data[0];
e50a1c2e
BF		 4315};
4316
4317static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4318{
4319 struct nfs_inode *nfsi = NFS_I(inode);
4320
4321 spin_lock(&inode->i_lock);
4322 kfree(nfsi->nfs4_acl);
4323 nfsi->nfs4_acl = acl;
4324 spin_unlock(&inode->i_lock);
4325}
4326
4327static void nfs4_zap_acl_attr(struct inode *inode)
4328{
4329 nfs4_set_cached_acl(inode, NULL);
4330}
4331
4332static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4333{
4334 struct nfs_inode *nfsi = NFS_I(inode);
4335 struct nfs4_cached_acl *acl;
4336 int ret = -ENOENT;
4337
4338 spin_lock(&inode->i_lock);
4339 acl = nfsi->nfs4_acl;
4340 if (acl == NULL)
4341 goto out;
4342 if (buf == NULL) /* user is just asking for length */
4343 goto out_len;
4344 if (acl->cached == 0)
4345 goto out;
4346 ret = -ERANGE; /* see getxattr(2) man page */
4347 if (acl->len > buflen)
4348 goto out;
4349 memcpy(buf, acl->data, acl->len);
4350out_len:
4351 ret = acl->len;
4352out:
4353 spin_unlock(&inode->i_lock);
4354 return ret;
4355}
4356
5794d21e 4357static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4358{
4359 struct nfs4_cached_acl *acl;
b291f1b1 4360 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4361
1f1ea6c2 4362 if (buflen <= PAGE_SIZE) {
b291f1b1 4363 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4364 if (acl == NULL)
4365 goto out;
4366 acl->cached = 1;
5794d21e 4367 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4368 } else {
4369 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4370 if (acl == NULL)
4371 goto out;
4372 acl->cached = 0;
4373 }
4374 acl->len = acl_len;
4375out:
4376 nfs4_set_cached_acl(inode, acl);
4377}
4378
bf118a34
AA		 4379/*
4380 * The getxattr API returns the required buffer length when called with a
4381 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4382 * the required buf. On a NULL buf, we send a page of data to the server
4383 * guessing that the ACL request can be serviced by a page. If so, we cache
4384 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4385 * the cache. If not so, we throw away the page, and cache the required
4386 * length. The next getxattr call will then produce another round trip to
4387 * the server, this time with the input buf of the required size.
4388 */
16b4289c 4389static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4390{
bf118a34 4391 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4392 struct nfs_getaclargs args = {
4393 .fh = NFS_FH(inode),
4394 .acl_pages = pages,
4395 .acl_len = buflen,
4396 };
663c79b3
BH		 4397 struct nfs_getaclres res = {
4398 .acl_len = buflen,
4399 };
aa1870af
BF		 4400 struct rpc_message msg = {
4401 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4402 .rpc_argp = &args,
663c79b3 4403 .rpc_resp = &res,
aa1870af 4404 };
21f498c2
TM		 4405 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4406 int ret = -ENOMEM, i;
aa1870af 4407
bf118a34
AA		 4408 /* As long as we're doing a round trip to the server anyway,
4409 * let's be prepared for a page of acl data. */
4410 if (npages == 0)
4411 npages = 1;
21f498c2
TM		 4412 if (npages > ARRAY_SIZE(pages))
4413 return -ERANGE;
5a006899 4414
bf118a34
AA		 4415 for (i = 0; i < npages; i++) {
4416 pages[i] = alloc_page(GFP_KERNEL);
4417 if (!pages[i])
4418 goto out_free;
e50a1c2e 4419 }
5a006899
SP		 4420
4421 /* for decoding across pages */
4422 res.acl_scratch = alloc_page(GFP_KERNEL);
4423 if (!res.acl_scratch)
4424 goto out_free;
4425
bf118a34
AA		 4426 args.acl_len = npages * PAGE_SIZE;
4427 args.acl_pgbase = 0;
5a006899 4428
de040bec 4429 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4430 __func__, buf, buflen, npages, args.acl_len);
4431 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4432 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4433 if (ret)
4434 goto out_free;
bf118a34 4435
1f1ea6c2
TM		 4436 /* Handle the case where the passed-in buffer is too short */
4437 if (res.acl_flags & NFS4_ACL_TRUNC) {
4438 /* Did the user only issue a request for the acl length? */
4439 if (buf == NULL)
4440 goto out_ok;
e50a1c2e 4441 ret = -ERANGE;
1f1ea6c2 4442 goto out_free;
e50a1c2e 4443 }
1f1ea6c2 4444 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4445 if (buf) {
4446 if (res.acl_len > buflen) {
4447 ret = -ERANGE;
4448 goto out_free;
4449 }
1f1ea6c2 4450 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4451 }
1f1ea6c2
TM		 4452out_ok:
4453 ret = res.acl_len;
e50a1c2e 4454out_free:
bf118a34
AA		 4455 for (i = 0; i < npages; i++)
4456 if (pages[i])
4457 __free_page(pages[i]);
331818f1
TM		 4458 if (res.acl_scratch)
4459 __free_page(res.acl_scratch);
aa1870af
BF		 4460 return ret;
4461}
4462
16b4289c
TM		 4463static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4464{
4465 struct nfs4_exception exception = { };
4466 ssize_t ret;
4467 do {
4468 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4469 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4470 if (ret >= 0)
4471 break;
4472 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4473 } while (exception.retry);
4474 return ret;
4475}
4476
e50a1c2e
BF		 4477static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4478{
4479 struct nfs_server *server = NFS_SERVER(inode);
4480 int ret;
4481
4482 if (!nfs4_server_supports_acls(server))
4483 return -EOPNOTSUPP;
4484 ret = nfs_revalidate_inode(server, inode);
4485 if (ret < 0)
4486 return ret;
08a22b39
AK		 4487 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4488 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4489 ret = nfs4_read_cached_acl(inode, buf, buflen);
4490 if (ret != -ENOENT)
bf118a34
AA		 4491 /* -ENOENT is returned if there is no ACL or if there is an ACL
4492 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4493 return ret;
4494 return nfs4_get_acl_uncached(inode, buf, buflen);
4495}
4496
16b4289c 4497static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4498{
4499 struct nfs_server *server = NFS_SERVER(inode);
4500 struct page *pages[NFS4ACL_MAXPAGES];
4501 struct nfs_setaclargs arg = {
4502 .fh = NFS_FH(inode),
4503 .acl_pages = pages,
4504 .acl_len = buflen,
4505 };
73c403a9 4506 struct nfs_setaclres res;
4b580ee3
BF		 4507 struct rpc_message msg = {
4508 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4509 .rpc_argp = &arg,
73c403a9 4510 .rpc_resp = &res,
4b580ee3 4511 };
21f498c2 4512 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4513 int ret, i;
4b580ee3
BF		 4514
4515 if (!nfs4_server_supports_acls(server))
4516 return -EOPNOTSUPP;
21f498c2
TM		 4517 if (npages > ARRAY_SIZE(pages))
4518 return -ERANGE;
e9e3d724
NH		 4519 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4520 if (i < 0)
4521 return i;
57ec14c5 4522 nfs4_inode_return_delegation(inode);
7c513058 4523 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4524
4525 /*
4526 * Free each page after tx, so the only ref left is
4527 * held by the network stack
4528 */
4529 for (; i > 0; i--)
4530 put_page(pages[i-1]);
4531
08a22b39
AK		 4532 /*
4533 * Acl update can result in inode attribute update.
4534 * so mark the attribute cache invalid.
4535 */
4536 spin_lock(&inode->i_lock);
4537 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4538 spin_unlock(&inode->i_lock);
f41f7418
TM		 4539 nfs_access_zap_cache(inode);
4540 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4541 return ret;
4542}
4543
16b4289c
TM		 4544static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4545{
4546 struct nfs4_exception exception = { };
4547 int err;
4548 do {
c1578b76
TM		 4549 err = __nfs4_proc_set_acl(inode, buf, buflen);
4550 trace_nfs4_set_acl(inode, err);
4551 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4552 &exception);
4553 } while (exception.retry);
4554 return err;
4555}
4556
aa9c2669
DQ		 4557#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4558static int _nfs4_get_security_label(struct inode *inode, void *buf,
4559 size_t buflen)
4560{
4561 struct nfs_server *server = NFS_SERVER(inode);
4562 struct nfs_fattr fattr;
4563 struct nfs4_label label = {0, 0, buflen, buf};
4564
4565 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4566 struct nfs4_getattr_arg args = {
4567 .fh = NFS_FH(inode),
4568 .bitmask = bitmask,
4569 };
4570 struct nfs4_getattr_res res = {
4571 .fattr = &fattr,
4572 .label = &label,
4573 .server = server,
4574 };
4575 struct rpc_message msg = {
4576 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4577 .rpc_argp = &args,
4578 .rpc_resp = &res,
4579 };
4580 int ret;
4581
4582 nfs_fattr_init(&fattr);
4583
4584 ret = rpc_call_sync(server->client, &msg, 0);
4585 if (ret)
4586 return ret;
4587 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4588 return -ENOENT;
4589 if (buflen < label.len)
4590 return -ERANGE;
4591 return 0;
4592}
4593
4594static int nfs4_get_security_label(struct inode *inode, void *buf,
4595 size_t buflen)
4596{
4597 struct nfs4_exception exception = { };
4598 int err;
4599
4600 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4601 return -EOPNOTSUPP;
4602
4603 do {
c1578b76
TM		 4604 err = _nfs4_get_security_label(inode, buf, buflen);
4605 trace_nfs4_get_security_label(inode, err);
4606 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4607 &exception);
4608 } while (exception.retry);
4609 return err;
4610}
4611
4612static int _nfs4_do_set_security_label(struct inode *inode,
4613 struct nfs4_label *ilabel,
4614 struct nfs_fattr *fattr,
4615 struct nfs4_label *olabel)
4616{
4617
4618 struct iattr sattr = {0};
4619 struct nfs_server *server = NFS_SERVER(inode);
4620 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4621 struct nfs_setattrargs args = {
4622 .fh = NFS_FH(inode),
4623 .iap = &sattr,
4624 .server = server,
4625 .bitmask = bitmask,
4626 .label = ilabel,
4627 };
4628 struct nfs_setattrres res = {
4629 .fattr = fattr,
4630 .label = olabel,
4631 .server = server,
4632 };
4633 struct rpc_message msg = {
4634 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4635 .rpc_argp = &args,
4636 .rpc_resp = &res,
4637 };
4638 int status;
4639
4640 nfs4_stateid_copy(&args.stateid, &zero_stateid);
4641
4642 status = rpc_call_sync(server->client, &msg, 0);
4643 if (status)
4644 dprintk("%s failed: %d\n", __func__, status);
4645
4646 return status;
4647}
4648
4649static int nfs4_do_set_security_label(struct inode *inode,
4650 struct nfs4_label *ilabel,
4651 struct nfs_fattr *fattr,
4652 struct nfs4_label *olabel)
4653{
4654 struct nfs4_exception exception = { };
4655 int err;
4656
4657 do {
c1578b76
TM		 4658 err = _nfs4_do_set_security_label(inode, ilabel,
4659 fattr, olabel);
4660 trace_nfs4_set_security_label(inode, err);
4661 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4662 &exception);
4663 } while (exception.retry);
4664 return err;
4665}
4666
4667static int
4668nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4669{
4670 struct nfs4_label ilabel, *olabel = NULL;
4671 struct nfs_fattr fattr;
4672 struct rpc_cred *cred;
4673 struct inode *inode = dentry->d_inode;
4674 int status;
4675
4676 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4677 return -EOPNOTSUPP;
4678
4679 nfs_fattr_init(&fattr);
4680
4681 ilabel.pi = 0;
4682 ilabel.lfs = 0;
4683 ilabel.label = (char *)buf;
4684 ilabel.len = buflen;
4685
4686 cred = rpc_lookup_cred();
4687 if (IS_ERR(cred))
4688 return PTR_ERR(cred);
4689
4690 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4691 if (IS_ERR(olabel)) {
4692 status = -PTR_ERR(olabel);
4693 goto out;
4694 }
4695
4696 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4697 if (status == 0)
4698 nfs_setsecurity(inode, &fattr, olabel);
4699
4700 nfs4_label_free(olabel);
4701out:
4702 put_rpccred(cred);
4703 return status;
4704}
4705#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4706
4707
1da177e4 4708static int
aa5190d0 4709nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4710{
aa5190d0
TM		 4711 struct nfs_client *clp = server->nfs_client;
4712
4713 if (task->tk_status >= 0)
1da177e4
LT		 4714 return 0;
4715 switch(task->tk_status) {
a1d0b5ee 4716 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4717 case -NFS4ERR_ADMIN_REVOKED:
4718 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4719 if (state == NULL)
4720 break;
4721 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4722 case -NFS4ERR_OPENMODE:
4723 if (state == NULL)
4724 break;
5d422301
TM		 4725 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4726 goto stateid_invalid;
0400a6b0 4727 goto wait_on_recovery;
0ced63d1 4728 case -NFS4ERR_EXPIRED:
5d422301
TM		 4729 if (state != NULL) {
4730 if (nfs4_schedule_stateid_recovery(server, state) < 0)
4731 goto stateid_invalid;
4732 }
1da177e4 4733 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4734 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4735 nfs4_schedule_lease_recovery(clp);
4736 goto wait_on_recovery;
4745e315
AA		 4737#if defined(CONFIG_NFS_V4_1)
4738 case -NFS4ERR_BADSESSION:
4739 case -NFS4ERR_BADSLOT:
4740 case -NFS4ERR_BAD_HIGH_SLOT:
4741 case -NFS4ERR_DEADSESSION:
4742 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4743 case -NFS4ERR_SEQ_FALSE_RETRY:
4744 case -NFS4ERR_SEQ_MISORDERED:
4745 dprintk("%s ERROR %d, Reset session\n", __func__,
4746 task->tk_status);
9f594791 4747 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4745e315
AA		 4748 task->tk_status = 0;
4749 return -EAGAIN;
4750#endif /* CONFIG_NFS_V4_1 */
1da177e4 4751 case -NFS4ERR_DELAY:
aa5190d0 4752 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4753 case -NFS4ERR_GRACE:
1da177e4
LT		 4754 rpc_delay(task, NFS4_POLL_RETRY_MAX);
4755 task->tk_status = 0;
4756 return -EAGAIN;
a8a4ae3a 4757 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4
LT		 4758 case -NFS4ERR_OLD_STATEID:
4759 task->tk_status = 0;
4760 return -EAGAIN;
4761 }
4762 task->tk_status = nfs4_map_errors(task->tk_status);
4763 return 0;
5d422301
TM		 4764stateid_invalid:
4765 task->tk_status = -EIO;
4766 return 0;
0400a6b0 4767wait_on_recovery:
a2c0b9e2 4768 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4769 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4770 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
4771 task->tk_status = 0;
4772 return -EAGAIN;
1da177e4
LT		 4773}
4774
f092075d
CL		 4775static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4776 nfs4_verifier *bootverf)
cd93710e
CL		 4777{
4778 __be32 verf[2];
4779
2c820d9a
CL		 4780 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4781 /* An impossible timestamp guarantees this value
4782 * will never match a generated boot time. */
4783 verf[0] = 0;
17f26b12 4784 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4785 } else {
f092075d 4786 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4787 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4788 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4789 }
cd93710e
CL		 4790 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4791}
4792
e984a55a
CL		 4793static unsigned int
4794nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4795 char *buf, size_t len)
4796{
4797 unsigned int result;
4798
4799 rcu_read_lock();
4800 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4801 clp->cl_ipaddr,
4802 rpc_peeraddr2str(clp->cl_rpcclient,
4803 RPC_DISPLAY_ADDR),
4804 rpc_peeraddr2str(clp->cl_rpcclient,
4805 RPC_DISPLAY_PROTO));
4806 rcu_read_unlock();
4807 return result;
4808}
4809
4810static unsigned int
4811nfs4_init_uniform_client_string(const struct nfs_client *clp,
4812 char *buf, size_t len)
4813{
55b59293 4814 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4815
4816 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4817 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4818 clp->rpc_ops->version,
4819 clp->cl_minorversion,
4820 nfs4_client_id_uniquifier,
4821 nodename);
e984a55a
CL		 4822 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4823 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4824 nodename);
e984a55a
CL		 4825}
4826
6bbb4ae8
CL		 4827/**
4828 * nfs4_proc_setclientid - Negotiate client ID
4829 * @clp: state data structure
4830 * @program: RPC program for NFSv4 callback service
4831 * @port: IP port number for NFS4 callback service
4832 * @cred: RPC credential to use for this call
4833 * @res: where to place the result
4834 *
4835 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4836 */
bb8b27e5
TM		 4837int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4838 unsigned short port, struct rpc_cred *cred,
4839 struct nfs4_setclientid_res *res)
1da177e4
LT		 4840{
4841 nfs4_verifier sc_verifier;
4842 struct nfs4_setclientid setclientid = {
4843 .sc_verifier = &sc_verifier,
4844 .sc_prog = program,
f4eecd5d 4845 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4846 };
4847 struct rpc_message msg = {
4848 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4849 .rpc_argp = &setclientid,
bb8b27e5 4850 .rpc_resp = res,
286d7d6a 4851 .rpc_cred = cred,
1da177e4 4852 };
6bbb4ae8 4853 int status;
1da177e4 4854
de734831 4855 /* nfs_client_id4 */
f092075d 4856 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4857 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4858 setclientid.sc_name_len =
4859 nfs4_init_uniform_client_string(clp,
4860 setclientid.sc_name,
4861 sizeof(setclientid.sc_name));
4862 else
4863 setclientid.sc_name_len =
4864 nfs4_init_nonuniform_client_string(clp,
4865 setclientid.sc_name,
4866 sizeof(setclientid.sc_name));
de734831 4867 /* cb_client4 */
e984a55a 4868 rcu_read_lock();
de734831 4869 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
fe2d5395 4870 sizeof(setclientid.sc_netid), "%s",
d4d3c507
CL		 4871 rpc_peeraddr2str(clp->cl_rpcclient,
4872 RPC_DISPLAY_NETID));
de734831
CL		 4873 rcu_read_unlock();
4874 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4875 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4876 clp->cl_ipaddr, port >> 8, port & 255);
4877
6bbb4ae8
CL		 4878 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4879 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4880 setclientid.sc_name_len, setclientid.sc_name);
4881 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4882 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 4883 dprintk("NFS reply setclientid: %d\n", status);
4884 return status;
1da177e4
LT		 4885}
4886
6bbb4ae8
CL		 4887/**
4888 * nfs4_proc_setclientid_confirm - Confirm client ID
4889 * @clp: state data structure
4890 * @res: result of a previous SETCLIENTID
4891 * @cred: RPC credential to use for this call
4892 *
4893 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4894 */
fd954ae1 4895int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4896 struct nfs4_setclientid_res *arg,
4897 struct rpc_cred *cred)
1da177e4 4898{
1da177e4
LT		 4899 struct rpc_message msg = {
4900 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4901 .rpc_argp = arg,
286d7d6a 4902 .rpc_cred = cred,
1da177e4 4903 };
1da177e4
LT		 4904 int status;
4905
6bbb4ae8
CL		 4906 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4907 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4908 clp->cl_clientid);
1bd714f2 4909 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4910 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 4911 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4912 return status;
4913}
4914
fe650407
TM		 4915struct nfs4_delegreturndata {
4916 struct nfs4_delegreturnargs args;
fa178f29 4917 struct nfs4_delegreturnres res;
fe650407
TM		 4918 struct nfs_fh fh;
4919 nfs4_stateid stateid;
26e976a8 4920 unsigned long timestamp;
fa178f29 4921 struct nfs_fattr fattr;
fe650407
TM		 4922 int rpc_status;
4923};
4924
fe650407
TM		 4925static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4926{
4927 struct nfs4_delegreturndata *data = calldata;
938e1010 4928
14516c3a
TM		 4929 if (!nfs4_sequence_done(task, &data->res.seq_res))
4930 return;
938e1010 4931
ca8acf8d 4932 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861
RL		 4933 switch (task->tk_status) {
4934 case -NFS4ERR_STALE_STATEID:
4935 case -NFS4ERR_EXPIRED:
4936 case 0:
fa178f29 4937 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4938 break;
4939 default:
4940 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4941 -EAGAIN) {
d00c5d43 4942 rpc_restart_call_prepare(task);
79708861
RL		 4943 return;
4944 }
4945 }
4946 data->rpc_status = task->tk_status;
fe650407
TM		 4947}
4948
4949static void nfs4_delegreturn_release(void *calldata)
4950{
fe650407
TM		 4951 kfree(calldata);
4952}
4953
938e1010
AA		 4954static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4955{
4956 struct nfs4_delegreturndata *d_data;
4957
4958 d_data = (struct nfs4_delegreturndata *)data;
4959
d9afbd1b
TM		 4960 nfs4_setup_sequence(d_data->res.server,
4961 &d_data->args.seq_args,
4962 &d_data->res.seq_res,
4963 task);
938e1010 4964}
938e1010 4965
c8d149f3 4966static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 4967 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 4968 .rpc_call_done = nfs4_delegreturn_done,
4969 .rpc_release = nfs4_delegreturn_release,
4970};
4971
e6f81075 4972static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 4973{
4974 struct nfs4_delegreturndata *data;
fa178f29 4975 struct nfs_server *server = NFS_SERVER(inode);
fe650407 4976 struct rpc_task *task;
5138fde0
TM		 4977 struct rpc_message msg = {
4978 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
4979 .rpc_cred = cred,
4980 };
c970aa85
TM		 4981 struct rpc_task_setup task_setup_data = {
4982 .rpc_client = server->client,
5138fde0 4983 .rpc_message = &msg,
c970aa85
TM		 4984 .callback_ops = &nfs4_delegreturn_ops,
4985 .flags = RPC_TASK_ASYNC,
4986 };
e6f81075 4987 int status = 0;
fe650407 4988
8535b2be 4989 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 4990 if (data == NULL)
4991 return -ENOMEM;
a9c92d6b 4992 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 4993 data->args.fhandle = &data->fh;
4994 data->args.stateid = &data->stateid;
9e907fec 4995 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 4996 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 4997 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 4998 data->res.fattr = &data->fattr;
4999 data->res.server = server;
5138fde0 5000 nfs_fattr_init(data->res.fattr);
26e976a8 5001 data->timestamp = jiffies;
fe650407
TM		 5002 data->rpc_status = 0;
5003
c970aa85 5004 task_setup_data.callback_data = data;
1174dd1f
TM		 5005 msg.rpc_argp = &data->args;
5006 msg.rpc_resp = &data->res;
c970aa85 5007 task = rpc_run_task(&task_setup_data);
7a1218a2 5008 if (IS_ERR(task))
fe650407 5009 return PTR_ERR(task);
e6f81075
TM		 5010 if (!issync)
5011 goto out;
fe650407 5012 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5013 if (status != 0)
5014 goto out;
5015 status = data->rpc_status;
e144cbcc
TM		 5016 if (status == 0)
5017 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5018 else
5019 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5020out:
e6b3c4db 5021 rpc_put_task(task);
fe650407 5022 return status;
1da177e4
LT		 5023}
5024
e6f81075 5025int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5026{
5027 struct nfs_server *server = NFS_SERVER(inode);
5028 struct nfs4_exception exception = { };
5029 int err;
5030 do {
e6f81075 5031 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5032 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5033 switch (err) {
5034 case -NFS4ERR_STALE_STATEID:
5035 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5036 case 0:
5037 return 0;
5038 }
5039 err = nfs4_handle_exception(server, err, &exception);
5040 } while (exception.retry);
5041 return err;
5042}
5043
5044#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5045#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5046
5047/*
5048 * sleep, with exponential backoff, and retry the LOCK operation.
5049 */
5050static unsigned long
5051nfs4_set_lock_task_retry(unsigned long timeout)
5052{
416ad3c9 5053 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5054 timeout <<= 1;
5055 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5056 return NFS4_LOCK_MAXTIMEOUT;
5057 return timeout;
5058}
5059
1da177e4
LT		 5060static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5061{
5062 struct inode *inode = state->inode;
5063 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5064 struct nfs_client *clp = server->nfs_client;
911d1aaf 5065 struct nfs_lockt_args arg = {
1da177e4 5066 .fh = NFS_FH(inode),
911d1aaf 5067 .fl = request,
1da177e4 5068 };
911d1aaf
TM		 5069 struct nfs_lockt_res res = {
5070 .denied = request,
1da177e4
LT		 5071 };
5072 struct rpc_message msg = {
5073 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5074 .rpc_argp = &arg,
5075 .rpc_resp = &res,
5076 .rpc_cred = state->owner->so_cred,
5077 };
1da177e4
LT		 5078 struct nfs4_lock_state *lsp;
5079 int status;
5080
911d1aaf 5081 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5082 status = nfs4_set_lock_state(state, request);
5083 if (status != 0)
5084 goto out;
5085 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5086 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5087 arg.lock_owner.s_dev = server->s_dev;
7c513058 5088 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5089 switch (status) {
5090 case 0:
5091 request->fl_type = F_UNLCK;
5092 break;
5093 case -NFS4ERR_DENIED:
5094 status = 0;
1da177e4 5095 }
70cc6487 5096 request->fl_ops->fl_release_private(request);
8d0a8a9d 5097out:
1da177e4
LT		 5098 return status;
5099}
5100
5101static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5102{
5103 struct nfs4_exception exception = { };
5104 int err;
5105
5106 do {
d1b748a5
TM		 5107 err = _nfs4_proc_getlk(state, cmd, request);
5108 trace_nfs4_get_lock(request, state, cmd, err);
5109 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5110 &exception);
5111 } while (exception.retry);
5112 return err;
5113}
5114
5115static int do_vfs_lock(struct file *file, struct file_lock *fl)
5116{
5117 int res = 0;
5118 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5119 case FL_POSIX:
5120 res = posix_lock_file_wait(file, fl);
5121 break;
5122 case FL_FLOCK:
5123 res = flock_lock_file_wait(file, fl);
5124 break;
5125 default:
5126 BUG();
5127 }
1da177e4
LT		 5128 return res;
5129}
5130
faf5f49c 5131struct nfs4_unlockdata {
911d1aaf
TM		 5132 struct nfs_locku_args arg;
5133 struct nfs_locku_res res;
faf5f49c
TM		 5134 struct nfs4_lock_state *lsp;
5135 struct nfs_open_context *ctx;
911d1aaf
TM		 5136 struct file_lock fl;
5137 const struct nfs_server *server;
26e976a8 5138 unsigned long timestamp;
faf5f49c
TM		 5139};
5140
911d1aaf
TM		 5141static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5142 struct nfs_open_context *ctx,
5143 struct nfs4_lock_state *lsp,
5144 struct nfs_seqid *seqid)
5145{
5146 struct nfs4_unlockdata *p;
5147 struct inode *inode = lsp->ls_state->inode;
5148
8535b2be 5149 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5150 if (p == NULL)
5151 return NULL;
5152 p->arg.fh = NFS_FH(inode);
5153 p->arg.fl = &p->fl;
5154 p->arg.seqid = seqid;
c1d51931 5155 p->res.seqid = seqid;
911d1aaf
TM		 5156 p->arg.stateid = &lsp->ls_stateid;
5157 p->lsp = lsp;
5158 atomic_inc(&lsp->ls_count);
5159 /* Ensure we don't close file until we're done freeing locks! */
5160 p->ctx = get_nfs_open_context(ctx);
5161 memcpy(&p->fl, fl, sizeof(p->fl));
5162 p->server = NFS_SERVER(inode);
5163 return p;
5164}
5165
06f814a3 5166static void nfs4_locku_release_calldata(void *data)
faf5f49c 5167{
963d8fe5 5168 struct nfs4_unlockdata *calldata = data;
911d1aaf 5169 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5170 nfs4_put_lock_state(calldata->lsp);
5171 put_nfs_open_context(calldata->ctx);
5172 kfree(calldata);
faf5f49c
TM		 5173}
5174
963d8fe5 5175static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5176{
963d8fe5 5177 struct nfs4_unlockdata *calldata = data;
faf5f49c 5178
14516c3a
TM		 5179 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5180 return;
faf5f49c
TM		 5181 switch (task->tk_status) {
5182 case 0:
f597c537
TM		 5183 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5184 &calldata->res.stateid);
26e976a8 5185 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5186 break;
9e33bed5
TM		 5187 case -NFS4ERR_BAD_STATEID:
5188 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5189 case -NFS4ERR_STALE_STATEID:
5190 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5191 break;
5192 default:
9e33bed5 5193 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 5194 rpc_restart_call_prepare(task);
faf5f49c 5195 }
2b1bc308 5196 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5197}
5198
4ce70ada 5199static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5200{
4ce70ada 5201 struct nfs4_unlockdata *calldata = data;
faf5f49c 5202
911d1aaf 5203 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5204 goto out_wait;
795a88c9 5205 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5206 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5207 goto out_no_action;
faf5f49c 5208 }
26e976a8 5209 calldata->timestamp = jiffies;
035168ab 5210 if (nfs4_setup_sequence(calldata->server,
a893693c 5211 &calldata->arg.seq_args,
2240a9e2
TM		 5212 &calldata->res.seq_res,
5213 task) != 0)
5214 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5215 return;
5216out_no_action:
5217 task->tk_action = NULL;
5218out_wait:
5219 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5220}
5221
963d8fe5 5222static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5223 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5224 .rpc_call_done = nfs4_locku_done,
06f814a3 5225 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5226};
5227
a5d16a4d
TM		 5228static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5229 struct nfs_open_context *ctx,
5230 struct nfs4_lock_state *lsp,
5231 struct nfs_seqid *seqid)
5232{
5233 struct nfs4_unlockdata *data;
5138fde0
TM		 5234 struct rpc_message msg = {
5235 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5236 .rpc_cred = ctx->cred,
5237 };
c970aa85
TM		 5238 struct rpc_task_setup task_setup_data = {
5239 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5240 .rpc_message = &msg,
c970aa85 5241 .callback_ops = &nfs4_locku_ops,
101070ca 5242 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5243 .flags = RPC_TASK_ASYNC,
5244 };
a5d16a4d 5245
fa940720
WAA		 5246 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5247 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5248
137d6aca
FF		 5249 /* Ensure this is an unlock - when canceling a lock, the
5250 * canceled lock is passed in, and it won't be an unlock.
5251 */
5252 fl->fl_type = F_UNLCK;
5253
a5d16a4d
TM		 5254 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5255 if (data == NULL) {
5256 nfs_free_seqid(seqid);
5257 return ERR_PTR(-ENOMEM);
5258 }
5259
a9c92d6b 5260 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5261 msg.rpc_argp = &data->arg;
5262 msg.rpc_resp = &data->res;
c970aa85
TM		 5263 task_setup_data.callback_data = data;
5264 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5265}
5266
faf5f49c
TM		 5267static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5268{
65b62a29
TM		 5269 struct inode *inode = state->inode;
5270 struct nfs4_state_owner *sp = state->owner;
5271 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5272 struct nfs_seqid *seqid;
1da177e4 5273 struct nfs4_lock_state *lsp;
06f814a3
TM		 5274 struct rpc_task *task;
5275 int status = 0;
536ff0f8 5276 unsigned char fl_flags = request->fl_flags;
faf5f49c 5277
8d0a8a9d 5278 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5279 /* Unlock _before_ we do the RPC call */
5280 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5281 /* Exclude nfs_delegation_claim_locks() */
5282 mutex_lock(&sp->so_delegreturn_mutex);
5283 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5284 down_read(&nfsi->rwsem);
5285 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5286 up_read(&nfsi->rwsem);
65b62a29 5287 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5288 goto out;
19e03c57
TM		 5289 }
5290 up_read(&nfsi->rwsem);
65b62a29 5291 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5292 if (status != 0)
9b073574
TM		 5293 goto out;
5294 /* Is this a delegated lock? */
8d0a8a9d 5295 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5296 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5297 goto out;
8535b2be 5298 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5299 status = -ENOMEM;
911d1aaf 5300 if (seqid == NULL)
9b073574 5301 goto out;
cd3758e3 5302 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5303 status = PTR_ERR(task);
5304 if (IS_ERR(task))
9b073574 5305 goto out;
a5d16a4d 5306 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5307 rpc_put_task(task);
9b073574 5308out:
536ff0f8 5309 request->fl_flags = fl_flags;
d1b748a5 5310 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5311 return status;
5312}
5313
a5d16a4d
TM		 5314struct nfs4_lockdata {
5315 struct nfs_lock_args arg;
5316 struct nfs_lock_res res;
5317 struct nfs4_lock_state *lsp;
5318 struct nfs_open_context *ctx;
5319 struct file_lock fl;
26e976a8 5320 unsigned long timestamp;
a5d16a4d
TM		 5321 int rpc_status;
5322 int cancelled;
66179efe 5323 struct nfs_server *server;
a5d16a4d
TM		 5324};
5325
5326static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5327 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5328 gfp_t gfp_mask)
1da177e4 5329{
a5d16a4d
TM		 5330 struct nfs4_lockdata *p;
5331 struct inode *inode = lsp->ls_state->inode;
1da177e4 5332 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5333
8535b2be 5334 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5335 if (p == NULL)
5336 return NULL;
5337
5338 p->arg.fh = NFS_FH(inode);
5339 p->arg.fl = &p->fl;
8535b2be 5340 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5341 if (p->arg.open_seqid == NULL)
5342 goto out_free;
8535b2be 5343 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5344 if (p->arg.lock_seqid == NULL)
2f74c0a0 5345 goto out_free_seqid;
a5d16a4d 5346 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5347 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5348 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5349 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5350 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5351 p->lsp = lsp;
66179efe 5352 p->server = server;
a5d16a4d
TM		 5353 atomic_inc(&lsp->ls_count);
5354 p->ctx = get_nfs_open_context(ctx);
5355 memcpy(&p->fl, fl, sizeof(p->fl));
5356 return p;
2f74c0a0
TM		 5357out_free_seqid:
5358 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5359out_free:
5360 kfree(p);
5361 return NULL;
5362}
5363
5364static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5365{
5366 struct nfs4_lockdata *data = calldata;
5367 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5368
3110ff80 5369 dprintk("%s: begin!\n", __func__);
2f74c0a0 5370 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5371 goto out_wait;
a5d16a4d
TM		 5372 /* Do we need to do an open_to_lock_owner? */
5373 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5374 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5375 goto out_release_lock_seqid;
8fe72bac 5376 }
8e472f33 5377 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5378 data->arg.new_lock_owner = 1;
c1d51931 5379 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5380 } else
5381 data->arg.new_lock_owner = 0;
5d422301
TM		 5382 if (!nfs4_valid_open_stateid(state)) {
5383 data->rpc_status = -EBADF;
5384 task->tk_action = NULL;
5385 goto out_release_open_seqid;
5386 }
26e976a8 5387 data->timestamp = jiffies;
035168ab
TM		 5388 if (nfs4_setup_sequence(data->server,
5389 &data->arg.seq_args,
2240a9e2 5390 &data->res.seq_res,
d9afbd1b 5391 task) == 0)
66179efe 5392 return;
5d422301 5393out_release_open_seqid:
2240a9e2
TM		 5394 nfs_release_seqid(data->arg.open_seqid);
5395out_release_lock_seqid:
5396 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5397out_wait:
5398 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5399 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5400}
5401
a5d16a4d
TM		 5402static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5403{
5404 struct nfs4_lockdata *data = calldata;
5405
3110ff80 5406 dprintk("%s: begin!\n", __func__);
a5d16a4d 5407
14516c3a
TM		 5408 if (!nfs4_sequence_done(task, &data->res.seq_res))
5409 return;
66179efe 5410
a5d16a4d 5411 data->rpc_status = task->tk_status;
a5d16a4d 5412 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5413 if (data->rpc_status == 0)
5414 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5415 else
5416 goto out;
5417 }
5418 if (data->rpc_status == 0) {
f597c537 5419 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5420 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5421 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5422 }
a5d16a4d 5423out:
3110ff80 5424 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5425}
5426
5427static void nfs4_lock_release(void *calldata)
5428{
5429 struct nfs4_lockdata *data = calldata;
5430
3110ff80 5431 dprintk("%s: begin!\n", __func__);
2f74c0a0 5432 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5433 if (data->cancelled != 0) {
5434 struct rpc_task *task;
5435 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5436 data->arg.lock_seqid);
5437 if (!IS_ERR(task))
bf294b41 5438 rpc_put_task_async(task);
3110ff80 5439 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5440 } else
5441 nfs_free_seqid(data->arg.lock_seqid);
5442 nfs4_put_lock_state(data->lsp);
5443 put_nfs_open_context(data->ctx);
5444 kfree(data);
3110ff80 5445 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5446}
5447
5448static const struct rpc_call_ops nfs4_lock_ops = {
5449 .rpc_call_prepare = nfs4_lock_prepare,
5450 .rpc_call_done = nfs4_lock_done,
5451 .rpc_release = nfs4_lock_release,
5452};
5453
2bee72a6
TM		 5454static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5455{
2bee72a6
TM		 5456 switch (error) {
5457 case -NFS4ERR_ADMIN_REVOKED:
5458 case -NFS4ERR_BAD_STATEID:
ecac799a 5459 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5460 if (new_lock_owner != 0 ||
795a88c9 5461 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5462 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5463 break;
5464 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5465 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5466 case -NFS4ERR_EXPIRED:
5467 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5468 };
5469}
5470
afe6c27c 5471static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5472{
5473 struct nfs4_lockdata *data;
5474 struct rpc_task *task;
5138fde0
TM		 5475 struct rpc_message msg = {
5476 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5477 .rpc_cred = state->owner->so_cred,
5478 };
c970aa85
TM		 5479 struct rpc_task_setup task_setup_data = {
5480 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5481 .rpc_message = &msg,
c970aa85 5482 .callback_ops = &nfs4_lock_ops,
101070ca 5483 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5484 .flags = RPC_TASK_ASYNC,
5485 };
a5d16a4d
TM		 5486 int ret;
5487
3110ff80 5488 dprintk("%s: begin!\n", __func__);
cd3758e3 5489 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5490 fl->fl_u.nfs4_fl.owner,
5491 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5492 if (data == NULL)
5493 return -ENOMEM;
5494 if (IS_SETLKW(cmd))
5495 data->arg.block = 1;
a9c92d6b 5496 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5497 msg.rpc_argp = &data->arg;
5498 msg.rpc_resp = &data->res;
c970aa85 5499 task_setup_data.callback_data = data;
8fe72bac
TM		 5500 if (recovery_type > NFS_LOCK_NEW) {
5501 if (recovery_type == NFS_LOCK_RECLAIM)
5502 data->arg.reclaim = NFS_LOCK_RECLAIM;
5503 nfs4_set_sequence_privileged(&data->arg.seq_args);
5504 }
c970aa85 5505 task = rpc_run_task(&task_setup_data);
7a1218a2 5506 if (IS_ERR(task))
a5d16a4d 5507 return PTR_ERR(task);
a5d16a4d
TM		 5508 ret = nfs4_wait_for_completion_rpc_task(task);
5509 if (ret == 0) {
5510 ret = data->rpc_status;
2bee72a6
TM		 5511 if (ret)
5512 nfs4_handle_setlk_error(data->server, data->lsp,
5513 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5514 } else
5515 data->cancelled = 1;
e6b3c4db 5516 rpc_put_task(task);
3110ff80 5517 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5518 return ret;
1da177e4
LT		 5519}
5520
5521static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5522{
202b50dc 5523 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5524 struct nfs4_exception exception = {
5525 .inode = state->inode,
5526 };
202b50dc
TM		 5527 int err;
5528
5529 do {
42a2d13e
TM		 5530 /* Cache the lock if possible... */
5531 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5532 return 0;
afe6c27c 5533 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5534 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5535 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5536 break;
5537 nfs4_handle_exception(server, err, &exception);
5538 } while (exception.retry);
5539 return err;
1da177e4
LT		 5540}
5541
5542static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5543{
202b50dc 5544 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5545 struct nfs4_exception exception = {
5546 .inode = state->inode,
5547 };
202b50dc
TM		 5548 int err;
5549
6bfc93ef
TM		 5550 err = nfs4_set_lock_state(state, request);
5551 if (err != 0)
5552 return err;
f6de7a39 5553 if (!recover_lost_locks) {
ef1820f9
N		 5554 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5555 return 0;
5556 }
202b50dc 5557 do {
42a2d13e
TM		 5558 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5559 return 0;
afe6c27c 5560 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5561 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5562 switch (err) {
5563 default:
5564 goto out;
5565 case -NFS4ERR_GRACE:
5566 case -NFS4ERR_DELAY:
5567 nfs4_handle_exception(server, err, &exception);
5568 err = 0;
5569 }
202b50dc 5570 } while (exception.retry);
a9ed2e25 5571out:
202b50dc 5572 return err;
1da177e4
LT		 5573}
5574
f062eb6c 5575#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5576/**
5577 * nfs41_check_expired_locks - possibly free a lock stateid
5578 *
5579 * @state: NFSv4 state for an inode
5580 *
5581 * Returns NFS_OK if recovery for this stateid is now finished.
5582 * Otherwise a negative NFS4ERR value is returned.
5583 */
b01dd1d8 5584static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5585{
eb64cf96 5586 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5587 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5588 struct nfs_server *server = NFS_SERVER(state->inode);
5589
b01dd1d8 5590 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5591 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5592 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5593
5594 status = nfs41_test_stateid(server,
5595 &lsp->ls_stateid,
5596 cred);
08cb47fa 5597 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5598 if (status != NFS_OK) {
3e60ffdd
CL		 5599 /* Free the stateid unless the server
5600 * informs us the stateid is unrecognized. */
89af2739
CL		 5601 if (status != -NFS4ERR_BAD_STATEID)
5602 nfs41_free_stateid(server,
ab7cb0df
TM		 5603 &lsp->ls_stateid,
5604 cred);
795a88c9 5605 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5606 ret = status;
5607 }
5608 }
5609 };
5610
5611 return ret;
5612}
5613
5614static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5615{
5616 int status = NFS_OK;
5617
5618 if (test_bit(LK_STATE_IN_USE, &state->flags))
5619 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5620 if (status != NFS_OK)
5621 status = nfs4_lock_expired(state, request);
5622 return status;
f062eb6c
BS		 5623}
5624#endif
5625
1da177e4
LT		 5626static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5627{
9a99af49 5628 struct nfs4_state_owner *sp = state->owner;
19e03c57 5629 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5630 unsigned char fl_flags = request->fl_flags;
9a99af49 5631 unsigned int seq;
8e469ebd 5632 int status = -ENOLCK;
1da177e4 5633
8e469ebd
TM		 5634 if ((fl_flags & FL_POSIX) &&
5635 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5636 goto out;
6bfc93ef 5637 /* Is this a delegated open? */
6bfc93ef
TM		 5638 status = nfs4_set_lock_state(state, request);
5639 if (status != 0)
5640 goto out;
01c3b861
TM		 5641 request->fl_flags |= FL_ACCESS;
5642 status = do_vfs_lock(request->fl_file, request);
5643 if (status < 0)
5644 goto out;
19e03c57 5645 down_read(&nfsi->rwsem);
01c3b861 5646 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5647 /* Yes: cache locks! */
01c3b861 5648 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5649 request->fl_flags = fl_flags & ~FL_SLEEP;
5650 status = do_vfs_lock(request->fl_file, request);
5651 goto out_unlock;
01c3b861 5652 }
9a99af49
TM		 5653 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5654 up_read(&nfsi->rwsem);
afe6c27c 5655 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5656 if (status != 0)
9a99af49
TM		 5657 goto out;
5658 down_read(&nfsi->rwsem);
5659 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5660 status = -NFS4ERR_DELAY;
01c3b861 5661 goto out_unlock;
9a99af49 5662 }
6bfc93ef 5663 /* Note: we always want to sleep here! */
01c3b861 5664 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5665 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5666 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5667 "manager!\n", __func__);
01c3b861 5668out_unlock:
19e03c57 5669 up_read(&nfsi->rwsem);
01c3b861
TM		 5670out:
5671 request->fl_flags = fl_flags;
1da177e4
LT		 5672 return status;
5673}
5674
5675static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5676{
a1d0b5ee
TM		 5677 struct nfs4_exception exception = {
5678 .state = state,
05ffe24f 5679 .inode = state->inode,
a1d0b5ee 5680 };
1da177e4
LT		 5681 int err;
5682
5683 do {
965b5d67 5684 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5685 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5686 if (err == -NFS4ERR_DENIED)
5687 err = -EAGAIN;
1da177e4 5688 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5689 err, &exception);
1da177e4
LT		 5690 } while (exception.retry);
5691 return err;
5692}
5693
5694static int
5695nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5696{
5697 struct nfs_open_context *ctx;
5698 struct nfs4_state *state;
5699 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5700 int status;
5701
5702 /* verify open state */
cd3758e3 5703 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5704 state = ctx->state;
5705
5706 if (request->fl_start < 0 || request->fl_end < 0)
5707 return -EINVAL;
5708
d953126a
TM		 5709 if (IS_GETLK(cmd)) {
5710 if (state != NULL)
5711 return nfs4_proc_getlk(state, F_GETLK, request);
5712 return 0;
5713 }
1da177e4
LT		 5714
5715 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5716 return -EINVAL;
5717
d953126a
TM		 5718 if (request->fl_type == F_UNLCK) {
5719 if (state != NULL)
5720 return nfs4_proc_unlck(state, cmd, request);
5721 return 0;
5722 }
1da177e4 5723
d953126a
TM		 5724 if (state == NULL)
5725 return -ENOLCK;
55725513
TM		 5726 /*
5727 * Don't rely on the VFS having checked the file open mode,
5728 * since it won't do this for flock() locks.
5729 */
f44106e2 5730 switch (request->fl_type) {
55725513
TM		 5731 case F_RDLCK:
5732 if (!(filp->f_mode & FMODE_READ))
5733 return -EBADF;
5734 break;
5735 case F_WRLCK:
5736 if (!(filp->f_mode & FMODE_WRITE))
5737 return -EBADF;
5738 }
5739
1da177e4
LT		 5740 do {
5741 status = nfs4_proc_setlk(state, cmd, request);
5742 if ((status != -EAGAIN) || IS_SETLK(cmd))
5743 break;
5744 timeout = nfs4_set_lock_task_retry(timeout);
5745 status = -ERESTARTSYS;
5746 if (signalled())
5747 break;
5748 } while(status < 0);
1da177e4
LT		 5749 return status;
5750}
5751
db4f2e63 5752int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5753{
5754 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5755 int err;
5756
5757 err = nfs4_set_lock_state(state, fl);
5758 if (err != 0)
db4f2e63 5759 return err;
4a706fa0 5760 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5761 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5762}
6b3b5496 5763
cf470c3e
TM		 5764struct nfs_release_lockowner_data {
5765 struct nfs4_lock_state *lsp;
5ae67c4f 5766 struct nfs_server *server;
cf470c3e 5767 struct nfs_release_lockowner_args args;
fbd4bfd1
CL		 5768 struct nfs4_sequence_args seq_args;
5769 struct nfs4_sequence_res seq_res;
cf470c3e
TM		 5770};
5771
fbd4bfd1
CL		 5772static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5773{
5774 struct nfs_release_lockowner_data *data = calldata;
5775 nfs40_setup_sequence(data->server,
5776 &data->seq_args, &data->seq_res, task);
5777}
5778
5779static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5780{
5781 struct nfs_release_lockowner_data *data = calldata;
5782 nfs40_sequence_done(task, &data->seq_res);
5783}
5784
d3c7b7cc
TM		 5785static void nfs4_release_lockowner_release(void *calldata)
5786{
cf470c3e 5787 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5788 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5789 kfree(calldata);
5790}
5791
17280175 5792static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 5793 .rpc_call_prepare = nfs4_release_lockowner_prepare,
5794 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 5795 .rpc_release = nfs4_release_lockowner_release,
5796};
5797
c8b2d0bf 5798static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5799{
cf470c3e 5800 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5801 struct rpc_message msg = {
5802 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5803 };
5804
5805 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e 5806 return -EINVAL;
fbd4bfd1 5807
cf470c3e
TM		 5808 data = kmalloc(sizeof(*data), GFP_NOFS);
5809 if (!data)
5810 return -ENOMEM;
fbd4bfd1 5811 nfs4_init_sequence(&data->seq_args, &data->seq_res, 0);
cf470c3e 5812 data->lsp = lsp;
5ae67c4f 5813 data->server = server;
cf470c3e
TM		 5814 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5815 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5816 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 5817
cf470c3e
TM		 5818 msg.rpc_argp = &data->args;
5819 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5820 return 0;
d3c7b7cc
TM		 5821}
5822
aa1870af
BF		 5823#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5824
64c2ce8b
AK		 5825static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5826 const void *buf, size_t buflen,
5827 int flags, int type)
6b3b5496 5828{
64c2ce8b
AK		 5829 if (strcmp(key, "") != 0)
5830 return -EINVAL;
4b580ee3 5831
64c2ce8b 5832 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5833}
5834
64c2ce8b
AK		 5835static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5836 void *buf, size_t buflen, int type)
6b3b5496 5837{
64c2ce8b
AK		 5838 if (strcmp(key, "") != 0)
5839 return -EINVAL;
aa1870af 5840
64c2ce8b 5841 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5842}
5843
64c2ce8b
AK		 5844static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5845 size_t list_len, const char *name,
5846 size_t name_len, int type)
6b3b5496 5847{
64c2ce8b 5848 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5849
096455a2
BF		 5850 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5851 return 0;
64c2ce8b
AK		 5852
5853 if (list && len <= list_len)
5854 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5855 return len;
6b3b5496
BF		 5856}
5857
c9bccef6
DQ		 5858#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5859static inline int nfs4_server_supports_labels(struct nfs_server *server)
5860{
5861 return server->caps & NFS_CAP_SECURITY_LABEL;
5862}
5863
5864static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
5865 const void *buf, size_t buflen,
5866 int flags, int type)
5867{
5868 if (security_ismaclabel(key))
5869 return nfs4_set_security_label(dentry, buf, buflen);
5870
5871 return -EOPNOTSUPP;
5872}
5873
5874static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
5875 void *buf, size_t buflen, int type)
5876{
5877 if (security_ismaclabel(key))
5878 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
5879 return -EOPNOTSUPP;
5880}
5881
5882static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
5883 size_t list_len, const char *name,
5884 size_t name_len, int type)
5885{
5886 size_t len = 0;
5887
5888 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
5889 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
5890 if (list && len <= list_len)
5891 security_inode_listsecurity(dentry->d_inode, list, len);
5892 }
5893 return len;
5894}
5895
5896static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
5897 .prefix = XATTR_SECURITY_PREFIX,
5898 .list = nfs4_xattr_list_nfs4_label,
5899 .get = nfs4_xattr_get_nfs4_label,
5900 .set = nfs4_xattr_set_nfs4_label,
5901};
5902#endif
5903
5904
533eb461
AA		 5905/*
5906 * nfs_fhget will use either the mounted_on_fileid or the fileid
5907 */
69aaaae1
TM		 5908static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5909{
533eb461
AA		 5910 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5911 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5912 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5913 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5914 return;
5915
5916 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5917 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5918 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5919 fattr->nlink = 2;
5920}
5921
f05d147f
BS		 5922static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5923 const struct qstr *name,
5924 struct nfs4_fs_locations *fs_locations,
5925 struct page *page)
683b57b4
TM		 5926{
5927 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 5928 u32 bitmask[3] = {
361e624f 5929 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5930 };
5931 struct nfs4_fs_locations_arg args = {
5932 .dir_fh = NFS_FH(dir),
c228fd3a 5933 .name = name,
683b57b4
TM		 5934 .page = page,
5935 .bitmask = bitmask,
5936 };
22958463
BH		 5937 struct nfs4_fs_locations_res res = {
5938 .fs_locations = fs_locations,
5939 };
683b57b4
TM		 5940 struct rpc_message msg = {
5941 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5942 .rpc_argp = &args,
22958463 5943 .rpc_resp = &res,
683b57b4
TM		 5944 };
5945 int status;
5946
3110ff80 5947 dprintk("%s: start\n", __func__);
533eb461
AA		 5948
5949 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5950 * is not supported */
5951 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5952 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5953 else
5954 bitmask[0] |= FATTR4_WORD0_FILEID;
5955
c228fd3a 5956 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5957 fs_locations->server = server;
830b8e33 5958 fs_locations->nlocations = 0;
f05d147f 5959 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5960 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5961 return status;
5962}
5963
f05d147f
BS		 5964int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5965 const struct qstr *name,
5966 struct nfs4_fs_locations *fs_locations,
5967 struct page *page)
db0a9593
BS		 5968{
5969 struct nfs4_exception exception = { };
5970 int err;
5971 do {
078ea3df
TM		 5972 err = _nfs4_proc_fs_locations(client, dir, name,
5973 fs_locations, page);
5974 trace_nfs4_get_fs_locations(dir, name, err);
5975 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 5976 &exception);
5977 } while (exception.retry);
5978 return err;
5979}
5980
5ec16a85 5981/**
a5250def
WAA		 5982 * If 'use_integrity' is true and the state managment nfs_client
5983 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
5984 * and the machine credential as per RFC3530bis and RFC5661 Security
5985 * Considerations sections. Otherwise, just use the user cred with the
5986 * filesystem's rpc_client.
5ec16a85 5987 */
a5250def 5988static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 5989{
5990 int status;
5991 struct nfs4_secinfo_arg args = {
5992 .dir_fh = NFS_FH(dir),
5993 .name = name,
5994 };
5995 struct nfs4_secinfo_res res = {
5996 .flavors = flavors,
5997 };
5998 struct rpc_message msg = {
5999 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6000 .rpc_argp = &args,
6001 .rpc_resp = &res,
6002 };
a5250def 6003 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6004 struct rpc_cred *cred = NULL;
a5250def
WAA		 6005
6006 if (use_integrity) {
6007 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6008 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6009 msg.rpc_cred = cred;
a5250def 6010 }
5a5ea0d4
BS		 6011
6012 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6013
6014 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6015 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6016
a5250def
WAA		 6017 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6018 &res.seq_res, 0);
5a5ea0d4 6019 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6020
7cb852df
WAA		 6021 if (cred)
6022 put_rpccred(cred);
a5250def 6023
5a5ea0d4
BS		 6024 return status;
6025}
6026
72de53ec
BS		 6027int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6028 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6029{
6030 struct nfs4_exception exception = { };
6031 int err;
6032 do {
a5250def
WAA		 6033 err = -NFS4ERR_WRONGSEC;
6034
6035 /* try to use integrity protection with machine cred */
6036 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6037 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6038
6039 /*
6040 * if unable to use integrity protection, or SECINFO with
6041 * integrity protection returns NFS4ERR_WRONGSEC (which is
6042 * disallowed by spec, but exists in deployed servers) use
6043 * the current filesystem's rpc_client and the user cred.
6044 */
6045 if (err == -NFS4ERR_WRONGSEC)
6046 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6047
078ea3df
TM		 6048 trace_nfs4_secinfo(dir, name, err);
6049 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6050 &exception);
6051 } while (exception.retry);
6052 return err;
6053}
6054
557134a3 6055#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6056/*
6057 * Check the exchange flags returned by the server for invalid flags, having
6058 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6059 * DS flags set.
6060 */
6061static int nfs4_check_cl_exchange_flags(u32 flags)
6062{
6063 if (flags & ~EXCHGID4_FLAG_MASK_R)
6064 goto out_inval;
6065 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6066 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6067 goto out_inval;
6068 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6069 goto out_inval;
6070 return NFS_OK;
6071out_inval:
6072 return -NFS4ERR_INVAL;
6073}
6074
78fe0f41 6075static bool
79d4e1f0
CL		 6076nfs41_same_server_scope(struct nfs41_server_scope *a,
6077 struct nfs41_server_scope *b)
78fe0f41
WAA		 6078{
6079 if (a->server_scope_sz == b->server_scope_sz &&
6080 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6081 return true;
6082
6083 return false;
6084}
6085
7c44f1ae
WAA		 6086/*
6087 * nfs4_proc_bind_conn_to_session()
6088 *
6089 * The 4.1 client currently uses the same TCP connection for the
6090 * fore and backchannel.
6091 */
2cf047c9 6092int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6093{
6094 int status;
6095 struct nfs41_bind_conn_to_session_res res;
6096 struct rpc_message msg = {
6097 .rpc_proc =
6098 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6099 .rpc_argp = clp,
6100 .rpc_resp = &res,
2cf047c9 6101 .rpc_cred = cred,
7c44f1ae
WAA		 6102 };
6103
6104 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 6105
6106 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6107 if (unlikely(res.session == NULL)) {
6108 status = -ENOMEM;
6109 goto out;
6110 }
6111
6112 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6113 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 6114 if (status == 0) {
6115 if (memcmp(res.session->sess_id.data,
6116 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6117 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6118 status = -EIO;
6119 goto out_session;
6120 }
6121 if (res.dir != NFS4_CDFS4_BOTH) {
6122 dprintk("NFS: %s: Unexpected direction from server\n",
6123 __func__);
6124 status = -EIO;
6125 goto out_session;
6126 }
6127 if (res.use_conn_in_rdma_mode) {
6128 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6129 __func__);
6130 status = -EIO;
6131 goto out_session;
6132 }
6133 }
6134out_session:
6135 kfree(res.session);
6136out:
6137 dprintk("<-- %s status= %d\n", __func__, status);
6138 return status;
6139}
6140
99fe60d0 6141/*
fa940720
WAA		 6142 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6143 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6144 */
6145static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6146 .how = SP4_MACH_CRED,
6147 .enforce.u.words = {
6148 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6149 1 << (OP_EXCHANGE_ID - 32) |
6150 1 << (OP_CREATE_SESSION - 32) |
6151 1 << (OP_DESTROY_SESSION - 32) |
6152 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6153 },
6154 .allow.u.words = {
6155 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6156 1 << (OP_LOCKU) |
6157 1 << (OP_COMMIT),
8b5bee2e 6158 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6159 1 << (OP_SECINFO_NO_NAME - 32) |
6160 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6161 1 << (OP_FREE_STATEID - 32) |
6162 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6163 }
6164};
6165
6166/*
6167 * Select the state protection mode for client `clp' given the server results
6168 * from exchange_id in `sp'.
99fe60d0 6169 *
2031cd1a
WAA		 6170 * Returns 0 on success, negative errno otherwise.
6171 */
6172static int nfs4_sp4_select_mode(struct nfs_client *clp,
6173 struct nfs41_state_protection *sp)
6174{
6175 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6176 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6177 1 << (OP_EXCHANGE_ID - 32) |
6178 1 << (OP_CREATE_SESSION - 32) |
6179 1 << (OP_DESTROY_SESSION - 32) |
6180 1 << (OP_DESTROY_CLIENTID - 32)
6181 };
6182 unsigned int i;
6183
6184 if (sp->how == SP4_MACH_CRED) {
6185 /* Print state protect result */
6186 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6187 for (i = 0; i <= LAST_NFS4_OP; i++) {
6188 if (test_bit(i, sp->enforce.u.longs))
6189 dfprintk(MOUNT, " enforce op %d\n", i);
6190 if (test_bit(i, sp->allow.u.longs))
6191 dfprintk(MOUNT, " allow op %d\n", i);
6192 }
6193
6194 /* make sure nothing is on enforce list that isn't supported */
6195 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6196 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6197 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6198 return -EINVAL;
6199 }
6200 }
6201
6202 /*
6203 * Minimal mode - state operations are allowed to use machine
6204 * credential. Note this already happens by default, so the
6205 * client doesn't have to do anything more than the negotiation.
6206 *
6207 * NOTE: we don't care if EXCHANGE_ID is in the list -
6208 * we're already using the machine cred for exchange_id
6209 * and will never use a different cred.
6210 */
6211 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6212 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6213 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6214 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6215 dfprintk(MOUNT, "sp4_mach_cred:\n");
6216 dfprintk(MOUNT, " minimal mode enabled\n");
6217 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6218 } else {
6219 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6220 return -EINVAL;
6221 }
fa940720
WAA		 6222
6223 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6224 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6225 dfprintk(MOUNT, " cleanup mode enabled\n");
6226 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6227 }
8b5bee2e
WAA		 6228
6229 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6230 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6231 dfprintk(MOUNT, " secinfo mode enabled\n");
6232 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6233 }
3787d506
WAA		 6234
6235 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6236 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6237 dfprintk(MOUNT, " stateid mode enabled\n");
6238 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6239 }
8c21c62c
WAA		 6240
6241 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6242 dfprintk(MOUNT, " write mode enabled\n");
6243 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6244 }
6245
6246 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6247 dfprintk(MOUNT, " commit mode enabled\n");
6248 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6249 }
2031cd1a
WAA		 6250 }
6251
6252 return 0;
6253}
6254
6255/*
6256 * _nfs4_proc_exchange_id()
6bbb4ae8 6257 *
2031cd1a 6258 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6259 */
2031cd1a
WAA		 6260static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6261 u32 sp4_how)
99fe60d0
BH		 6262{
6263 nfs4_verifier verifier;
6264 struct nfs41_exchange_id_args args = {
cd93710e 6265 .verifier = &verifier,
99fe60d0 6266 .client = clp,
4f0b429d
TM		 6267 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6268 EXCHGID4_FLAG_BIND_PRINC_STATEID,
99fe60d0
BH		 6269 };
6270 struct nfs41_exchange_id_res res = {
32b01310 6271 0
99fe60d0
BH		 6272 };
6273 int status;
6274 struct rpc_message msg = {
6275 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6276 .rpc_argp = &args,
6277 .rpc_resp = &res,
6278 .rpc_cred = cred,
6279 };
99fe60d0 6280
f092075d 6281 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6282 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6283 sizeof(args.id));
6bbb4ae8
CL		 6284 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6285 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6286 args.id_len, args.id);
99fe60d0 6287
acdeb69d 6288 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6289 GFP_NOFS);
acdeb69d 6290 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6291 status = -ENOMEM;
6292 goto out;
6293 }
78fe0f41 6294
79d4e1f0 6295 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6296 GFP_NOFS);
177313f1 6297 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6298 status = -ENOMEM;
acdeb69d 6299 goto out_server_owner;
abe9a6d5 6300 }
78fe0f41 6301
bbafffd2 6302 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6303 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6304 status = -ENOMEM;
6305 goto out_server_scope;
6306 }
6307
2031cd1a
WAA		 6308 switch (sp4_how) {
6309 case SP4_NONE:
6310 args.state_protect.how = SP4_NONE;
6311 break;
6312
6313 case SP4_MACH_CRED:
6314 args.state_protect = nfs4_sp4_mach_cred_request;
6315 break;
6316
6317 default:
6318 /* unsupported! */
6319 WARN_ON_ONCE(1);
6320 status = -EINVAL;
6321 goto out_server_scope;
6322 }
6323
1bd714f2 6324 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6325 trace_nfs4_exchange_id(clp, status);
177313f1 6326 if (status == 0)
32b01310 6327 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6328
2031cd1a
WAA		 6329 if (status == 0)
6330 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6331
acdeb69d 6332 if (status == 0) {
32b01310
TM		 6333 clp->cl_clientid = res.clientid;
6334 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6335 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6336 clp->cl_seqid = res.seqid;
6337
acdeb69d
CL		 6338 kfree(clp->cl_serverowner);
6339 clp->cl_serverowner = res.server_owner;
6340 res.server_owner = NULL;
78fe0f41 6341
7d2ed9ac 6342 /* use the most recent implementation id */
59155546
CL		 6343 kfree(clp->cl_implid);
6344 clp->cl_implid = res.impl_id;
7d2ed9ac 6345
177313f1 6346 if (clp->cl_serverscope != NULL &&
79d4e1f0 6347 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6348 res.server_scope)) {
6349 dprintk("%s: server_scope mismatch detected\n",
6350 __func__);
6351 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6352 kfree(clp->cl_serverscope);
6353 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6354 }
6355
177313f1 6356 if (clp->cl_serverscope == NULL) {
79d4e1f0 6357 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6358 goto out;
6359 }
32b01310
TM		 6360 } else
6361 kfree(res.impl_id);
7d2ed9ac 6362
acdeb69d
CL		 6363out_server_owner:
6364 kfree(res.server_owner);
7d2ed9ac 6365out_server_scope:
abe9a6d5
WAA		 6366 kfree(res.server_scope);
6367out:
177313f1 6368 if (clp->cl_implid != NULL)
6bbb4ae8 6369 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6370 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6371 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6372 clp->cl_implid->date.seconds,
6373 clp->cl_implid->date.nseconds);
6bbb4ae8 6374 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6375 return status;
6376}
6377
2031cd1a
WAA		 6378/*
6379 * nfs4_proc_exchange_id()
6380 *
6381 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6382 *
6383 * Since the clientid has expired, all compounds using sessions
6384 * associated with the stale clientid will be returning
6385 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6386 * be in some phase of session reset.
6387 *
6388 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6389 */
6390int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6391{
6392 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6393 int status;
6394
6395 /* try SP4_MACH_CRED if krb5i/p */
6396 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6397 authflavor == RPC_AUTH_GSS_KRB5P) {
6398 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6399 if (!status)
6400 return 0;
6401 }
6402
6403 /* try SP4_NONE */
6404 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6405}
6406
66245539
TM		 6407static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6408 struct rpc_cred *cred)
6409{
6410 struct rpc_message msg = {
6411 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6412 .rpc_argp = clp,
6413 .rpc_cred = cred,
6414 };
6415 int status;
6416
6417 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6418 trace_nfs4_destroy_clientid(clp, status);
66245539 6419 if (status)
02c67525 6420 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6421 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6422 return status;
6423}
6424
6425static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6426 struct rpc_cred *cred)
6427{
6428 unsigned int loop;
6429 int ret;
6430
6431 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6432 ret = _nfs4_proc_destroy_clientid(clp, cred);
6433 switch (ret) {
6434 case -NFS4ERR_DELAY:
6435 case -NFS4ERR_CLIENTID_BUSY:
6436 ssleep(1);
6437 break;
6438 default:
6439 return ret;
6440 }
6441 }
6442 return 0;
6443}
6444
6445int nfs4_destroy_clientid(struct nfs_client *clp)
6446{
6447 struct rpc_cred *cred;
6448 int ret = 0;
6449
6450 if (clp->cl_mvops->minor_version < 1)
6451 goto out;
6452 if (clp->cl_exchange_flags == 0)
6453 goto out;
05f4c350
CL		 6454 if (clp->cl_preserve_clid)
6455 goto out;
73d8bde5 6456 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6457 ret = nfs4_proc_destroy_clientid(clp, cred);
6458 if (cred)
6459 put_rpccred(cred);
6460 switch (ret) {
6461 case 0:
6462 case -NFS4ERR_STALE_CLIENTID:
6463 clp->cl_exchange_flags = 0;
6464 }
6465out:
6466 return ret;
6467}
6468
2050f0cc
AA		 6469struct nfs4_get_lease_time_data {
6470 struct nfs4_get_lease_time_args *args;
6471 struct nfs4_get_lease_time_res *res;
6472 struct nfs_client *clp;
6473};
6474
6475static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6476 void *calldata)
6477{
2050f0cc
AA		 6478 struct nfs4_get_lease_time_data *data =
6479 (struct nfs4_get_lease_time_data *)calldata;
6480
6481 dprintk("--> %s\n", __func__);
6482 /* just setup sequence, do not trigger session recovery
6483 since we're invoked within one */
d9afbd1b
TM		 6484 nfs41_setup_sequence(data->clp->cl_session,
6485 &data->args->la_seq_args,
6486 &data->res->lr_seq_res,
6487 task);
2050f0cc
AA		 6488 dprintk("<-- %s\n", __func__);
6489}
6490
6491/*
6492 * Called from nfs4_state_manager thread for session setup, so don't recover
6493 * from sequence operation or clientid errors.
6494 */
6495static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6496{
6497 struct nfs4_get_lease_time_data *data =
6498 (struct nfs4_get_lease_time_data *)calldata;
6499
6500 dprintk("--> %s\n", __func__);
14516c3a
TM		 6501 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6502 return;
2050f0cc
AA		 6503 switch (task->tk_status) {
6504 case -NFS4ERR_DELAY:
6505 case -NFS4ERR_GRACE:
6506 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6507 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6508 task->tk_status = 0;
a8a4ae3a
AA		 6509 /* fall through */
6510 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 6511 rpc_restart_call_prepare(task);
2050f0cc
AA		 6512 return;
6513 }
2050f0cc
AA		 6514 dprintk("<-- %s\n", __func__);
6515}
6516
17280175 6517static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 6518 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6519 .rpc_call_done = nfs4_get_lease_time_done,
6520};
6521
6522int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6523{
6524 struct rpc_task *task;
6525 struct nfs4_get_lease_time_args args;
6526 struct nfs4_get_lease_time_res res = {
6527 .lr_fsinfo = fsinfo,
6528 };
6529 struct nfs4_get_lease_time_data data = {
6530 .args = &args,
6531 .res = &res,
6532 .clp = clp,
6533 };
6534 struct rpc_message msg = {
6535 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6536 .rpc_argp = &args,
6537 .rpc_resp = &res,
6538 };
6539 struct rpc_task_setup task_setup = {
6540 .rpc_client = clp->cl_rpcclient,
6541 .rpc_message = &msg,
6542 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 6543 .callback_data = &data,
6544 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 6545 };
6546 int status;
6547
a9c92d6b 6548 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 6549 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 6550 dprintk("--> %s\n", __func__);
6551 task = rpc_run_task(&task_setup);
6552
6553 if (IS_ERR(task))
6554 status = PTR_ERR(task);
6555 else {
6556 status = task->tk_status;
6557 rpc_put_task(task);
6558 }
6559 dprintk("<-- %s return %d\n", __func__, status);
6560
6561 return status;
6562}
6563
fc931582
AA		 6564/*
6565 * Initialize the values to be used by the client in CREATE_SESSION
6566 * If nfs4_init_session set the fore channel request and response sizes,
6567 * use them.
6568 *
6569 * Set the back channel max_resp_sz_cached to zero to force the client to
6570 * always set csa_cachethis to FALSE because the current implementation
6571 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
6572 */
6573static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
6574{
18aad3d5
AA		 6575 unsigned int max_rqst_sz, max_resp_sz;
6576
6577 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
6578 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 6579
fc931582 6580 /* Fore channel attributes */
18aad3d5
AA		 6581 args->fc_attrs.max_rqst_sz = max_rqst_sz;
6582 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 6583 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 6584 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 6585
6586 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 6587 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 6588 __func__,
6589 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 6590 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 6591
6592 /* Back channel attributes */
fc931582
AA		 6593 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
6594 args->bc_attrs.max_resp_sz = PAGE_SIZE;
6595 args->bc_attrs.max_resp_sz_cached = 0;
6596 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
6597 args->bc_attrs.max_reqs = 1;
6598
6599 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
6600 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
6601 __func__,
6602 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
6603 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
6604 args->bc_attrs.max_reqs);
6605}
6606
43c2e885 6607static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 6608{
43c2e885
BF		 6609 struct nfs4_channel_attrs *sent = &args->fc_attrs;
6610 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
6611
43c2e885
BF		 6612 if (rcvd->max_resp_sz > sent->max_resp_sz)
6613 return -EINVAL;
6614 /*
6615 * Our requested max_ops is the minimum we need; we're not
6616 * prepared to break up compounds into smaller pieces than that.
6617 * So, no point even trying to continue if the server won't
6618 * cooperate:
6619 */
6620 if (rcvd->max_ops < sent->max_ops)
6621 return -EINVAL;
6622 if (rcvd->max_reqs == 0)
6623 return -EINVAL;
b4b9a0c1
VG		 6624 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
6625 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 6626 return 0;
8d35301d
AA		 6627}
6628
43c2e885
BF		 6629static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6630{
6631 struct nfs4_channel_attrs *sent = &args->bc_attrs;
6632 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 6633
43c2e885
BF		 6634 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
6635 return -EINVAL;
6636 if (rcvd->max_resp_sz < sent->max_resp_sz)
6637 return -EINVAL;
6638 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
6639 return -EINVAL;
6640 /* These would render the backchannel useless: */
b4b9a0c1 6641 if (rcvd->max_ops != sent->max_ops)
43c2e885 6642 return -EINVAL;
b4b9a0c1 6643 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 6644 return -EINVAL;
6645 return 0;
6646}
8d35301d 6647
8d35301d
AA		 6648static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
6649 struct nfs4_session *session)
6650{
43c2e885 6651 int ret;
8d35301d 6652
43c2e885
BF		 6653 ret = nfs4_verify_fore_channel_attrs(args, session);
6654 if (ret)
6655 return ret;
6656 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 6657}
6658
848f5bda
TM		 6659static int _nfs4_proc_create_session(struct nfs_client *clp,
6660 struct rpc_cred *cred)
fc931582
AA		 6661{
6662 struct nfs4_session *session = clp->cl_session;
6663 struct nfs41_create_session_args args = {
6664 .client = clp,
6665 .cb_program = NFS4_CALLBACK,
6666 };
6667 struct nfs41_create_session_res res = {
6668 .client = clp,
6669 };
6670 struct rpc_message msg = {
6671 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
6672 .rpc_argp = &args,
6673 .rpc_resp = &res,
848f5bda 6674 .rpc_cred = cred,
fc931582
AA		 6675 };
6676 int status;
6677
6678 nfs4_init_channel_attrs(&args);
0f91421e 6679 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 6680
1bd714f2 6681 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6682 trace_nfs4_create_session(clp, status);
fc931582 6683
43095d39 6684 if (!status) {
8d35301d
AA		 6685 /* Verify the session's negotiated channel_attrs values */
6686 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 6687 /* Increment the clientid slot sequence id */
6688 clp->cl_seqid++;
6689 }
6690
6691 return status;
6692}
6693
6694/*
6695 * Issues a CREATE_SESSION operation to the server.
6696 * It is the responsibility of the caller to verify the session is
6697 * expired before calling this routine.
6698 */
848f5bda 6699int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 6700{
6701 int status;
6702 unsigned *ptr;
fc931582
AA		 6703 struct nfs4_session *session = clp->cl_session;
6704
6705 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
6706
848f5bda 6707 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 6708 if (status)
6709 goto out;
6710
aacd5537
AA		 6711 /* Init or reset the session slot tables */
6712 status = nfs4_setup_session_slot_tables(session);
6713 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 6714 if (status)
6715 goto out;
6716
6717 ptr = (unsigned *)&session->sess_id.data[0];
6718 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
6719 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 6720out:
6721 dprintk("<-- %s\n", __func__);
6722 return status;
6723}
6724
0f3e66c6
AA		 6725/*
6726 * Issue the over-the-wire RPC DESTROY_SESSION.
6727 * The caller must serialize access to this routine.
6728 */
848f5bda
TM		 6729int nfs4_proc_destroy_session(struct nfs4_session *session,
6730 struct rpc_cred *cred)
0f3e66c6 6731{
848f5bda
TM		 6732 struct rpc_message msg = {
6733 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
6734 .rpc_argp = session,
6735 .rpc_cred = cred,
6736 };
0f3e66c6 6737 int status = 0;
0f3e66c6
AA		 6738
6739 dprintk("--> nfs4_proc_destroy_session\n");
6740
6741 /* session is still being setup */
6742 if (session->clp->cl_cons_state != NFS_CS_READY)
6743 return status;
6744
1bd714f2 6745 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6746 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 6747
6748 if (status)
08106ac7 6749 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 6750 "Session has been destroyed regardless...\n", status);
6751
6752 dprintk("<-- nfs4_proc_destroy_session\n");
6753 return status;
6754}
6755
fc01cea9
AA		 6756/*
6757 * Renew the cl_session lease.
6758 */
d5f8d3fe
TM		 6759struct nfs4_sequence_data {
6760 struct nfs_client *clp;
6761 struct nfs4_sequence_args args;
6762 struct nfs4_sequence_res res;
6763};
6764
dc96aef9
AB		 6765static void nfs41_sequence_release(void *data)
6766{
d5f8d3fe
TM		 6767 struct nfs4_sequence_data *calldata = data;
6768 struct nfs_client *clp = calldata->clp;
dc96aef9 6769
7135840f
AB		 6770 if (atomic_read(&clp->cl_count) > 1)
6771 nfs4_schedule_state_renewal(clp);
6772 nfs_put_client(clp);
d5f8d3fe 6773 kfree(calldata);
dc96aef9
AB		 6774}
6775
aa5190d0
TM		 6776static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6777{
6778 switch(task->tk_status) {
6779 case -NFS4ERR_DELAY:
aa5190d0
TM		 6780 rpc_delay(task, NFS4_POLL_RETRY_MAX);
6781 return -EAGAIN;
6782 default:
0400a6b0 6783 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6784 }
6785 return 0;
6786}
6787
dc96aef9 6788static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 6789{
d5f8d3fe
TM		 6790 struct nfs4_sequence_data *calldata = data;
6791 struct nfs_client *clp = calldata->clp;
fc01cea9 6792
14516c3a
TM		 6793 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
6794 return;
fc01cea9 6795
c6d01c6f 6796 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 6797 if (task->tk_status < 0) {
6798 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 6799 if (atomic_read(&clp->cl_count) == 1)
6800 goto out;
fc01cea9 6801
aa5190d0
TM		 6802 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
6803 rpc_restart_call_prepare(task);
fc01cea9
AA		 6804 return;
6805 }
6806 }
fc01cea9 6807 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 6808out:
fc01cea9
AA		 6809 dprintk("<-- %s\n", __func__);
6810}
6811
6812static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
6813{
d5f8d3fe
TM		 6814 struct nfs4_sequence_data *calldata = data;
6815 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 6816 struct nfs4_sequence_args *args;
6817 struct nfs4_sequence_res *res;
6818
fc01cea9
AA		 6819 args = task->tk_msg.rpc_argp;
6820 res = task->tk_msg.rpc_resp;
6821
d9afbd1b 6822 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 6823}
6824
6825static const struct rpc_call_ops nfs41_sequence_ops = {
6826 .rpc_call_done = nfs41_sequence_call_done,
6827 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 6828 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 6829};
6830
8fe72bac
TM		 6831static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
6832 struct rpc_cred *cred,
6833 bool is_privileged)
fc01cea9 6834{
d5f8d3fe 6835 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 6836 struct rpc_message msg = {
6837 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
6838 .rpc_cred = cred,
6839 };
71ac6da9
TM		 6840 struct rpc_task_setup task_setup_data = {
6841 .rpc_client = clp->cl_rpcclient,
6842 .rpc_message = &msg,
8fe72bac 6843 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 6844 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 6845 };
fc01cea9 6846
7135840f 6847 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 6848 return ERR_PTR(-EIO);
dfb4f309 6849 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 6850 if (calldata == NULL) {
7135840f 6851 nfs_put_client(clp);
71ac6da9 6852 return ERR_PTR(-ENOMEM);
fc01cea9 6853 }
a9c92d6b 6854 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 6855 if (is_privileged)
6856 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 6857 msg.rpc_argp = &calldata->args;
6858 msg.rpc_resp = &calldata->res;
6859 calldata->clp = clp;
71ac6da9 6860 task_setup_data.callback_data = calldata;
fc01cea9 6861
71ac6da9
TM		 6862 return rpc_run_task(&task_setup_data);
6863}
6864
2f60ea6b 6865static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 6866{
6867 struct rpc_task *task;
6868 int ret = 0;
6869
2f60ea6b
TM		 6870 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
6871 return 0;
8fe72bac 6872 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 6873 if (IS_ERR(task))
6874 ret = PTR_ERR(task);
6875 else
bf294b41 6876 rpc_put_task_async(task);
71ac6da9
TM		 6877 dprintk("<-- %s status=%d\n", __func__, ret);
6878 return ret;
6879}
6880
6881static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
6882{
6883 struct rpc_task *task;
6884 int ret;
6885
8fe72bac 6886 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 6887 if (IS_ERR(task)) {
6888 ret = PTR_ERR(task);
6889 goto out;
6890 }
6891 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 6892 if (!ret) {
6893 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
6894
6895 if (task->tk_status == 0)
6896 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 6897 ret = task->tk_status;
b4410c2f 6898 }
71ac6da9
TM		 6899 rpc_put_task(task);
6900out:
6901 dprintk("<-- %s status=%d\n", __func__, ret);
6902 return ret;
fc01cea9
AA		 6903}
6904
fce5c838
RL		 6905struct nfs4_reclaim_complete_data {
6906 struct nfs_client *clp;
6907 struct nfs41_reclaim_complete_args arg;
6908 struct nfs41_reclaim_complete_res res;
6909};
6910
6911static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
6912{
6913 struct nfs4_reclaim_complete_data *calldata = data;
6914
d9afbd1b
TM		 6915 nfs41_setup_sequence(calldata->clp->cl_session,
6916 &calldata->arg.seq_args,
6917 &calldata->res.seq_res,
6918 task);
fce5c838
RL		 6919}
6920
aa5190d0
TM		 6921static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
6922{
6923 switch(task->tk_status) {
6924 case 0:
6925 case -NFS4ERR_COMPLETE_ALREADY:
6926 case -NFS4ERR_WRONG_CRED: /* What to do here? */
6927 break;
6928 case -NFS4ERR_DELAY:
aa5190d0 6929 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 6930 /* fall through */
6931 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 6932 return -EAGAIN;
6933 default:
0400a6b0 6934 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 6935 }
6936 return 0;
6937}
6938
fce5c838
RL		 6939static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
6940{
6941 struct nfs4_reclaim_complete_data *calldata = data;
6942 struct nfs_client *clp = calldata->clp;
6943 struct nfs4_sequence_res *res = &calldata->res.seq_res;
6944
6945 dprintk("--> %s\n", __func__);
14516c3a
TM		 6946 if (!nfs41_sequence_done(task, res))
6947 return;
fce5c838 6948
c6d01c6f 6949 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 6950 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
6951 rpc_restart_call_prepare(task);
6952 return;
6953 }
fce5c838
RL		 6954 dprintk("<-- %s\n", __func__);
6955}
6956
6957static void nfs4_free_reclaim_complete_data(void *data)
6958{
6959 struct nfs4_reclaim_complete_data *calldata = data;
6960
6961 kfree(calldata);
6962}
6963
6964static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
6965 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
6966 .rpc_call_done = nfs4_reclaim_complete_done,
6967 .rpc_release = nfs4_free_reclaim_complete_data,
6968};
6969
6970/*
6971 * Issue a global reclaim complete.
6972 */
965e9c23
TM		 6973static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
6974 struct rpc_cred *cred)
fce5c838
RL		 6975{
6976 struct nfs4_reclaim_complete_data *calldata;
6977 struct rpc_task *task;
6978 struct rpc_message msg = {
6979 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 6980 .rpc_cred = cred,
fce5c838
RL		 6981 };
6982 struct rpc_task_setup task_setup_data = {
6983 .rpc_client = clp->cl_rpcclient,
6984 .rpc_message = &msg,
6985 .callback_ops = &nfs4_reclaim_complete_call_ops,
6986 .flags = RPC_TASK_ASYNC,
6987 };
6988 int status = -ENOMEM;
6989
6990 dprintk("--> %s\n", __func__);
8535b2be 6991 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 6992 if (calldata == NULL)
6993 goto out;
6994 calldata->clp = clp;
6995 calldata->arg.one_fs = 0;
fce5c838 6996
a9c92d6b 6997 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 6998 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 6999 msg.rpc_argp = &calldata->arg;
7000 msg.rpc_resp = &calldata->res;
7001 task_setup_data.callback_data = calldata;
7002 task = rpc_run_task(&task_setup_data);
acf82b85 7003 if (IS_ERR(task)) {
fce5c838 7004 status = PTR_ERR(task);
acf82b85
DC		 7005 goto out;
7006 }
c34c32ea
AA		 7007 status = nfs4_wait_for_completion_rpc_task(task);
7008 if (status == 0)
7009 status = task->tk_status;
fce5c838 7010 rpc_put_task(task);
acf82b85 7011 return 0;
fce5c838
RL		 7012out:
7013 dprintk("<-- %s status=%d\n", __func__, status);
7014 return status;
7015}
b1f69b75
AA		 7016
7017static void
7018nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7019{
7020 struct nfs4_layoutget *lgp = calldata;
c31663d4 7021 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7022 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7023
7024 dprintk("--> %s\n", __func__);
c31663d4
FI		 7025 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7026 * right now covering the LAYOUTGET we are about to send.
7027 * However, that is not so catastrophic, and there seems
7028 * to be no way to prevent it completely.
7029 */
6ba7db34 7030 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7031 &lgp->res.seq_res, task))
b1f69b75 7032 return;
cf7d63f1
FI		 7033 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7034 NFS_I(lgp->args.inode)->layout,
7035 lgp->args.ctx->state)) {
7036 rpc_exit(task, NFS4_OK);
cf7d63f1 7037 }
b1f69b75
AA		 7038}
7039
7040static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7041{
7042 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7043 struct inode *inode = lgp->args.inode;
7044 struct nfs_server *server = NFS_SERVER(inode);
7045 struct pnfs_layout_hdr *lo;
7046 struct nfs4_state *state = NULL;
30005121 7047 unsigned long timeo, giveup;
b1f69b75
AA		 7048
7049 dprintk("--> %s\n", __func__);
7050
6ba7db34 7051 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7052 goto out;
b1f69b75
AA		 7053
7054 switch (task->tk_status) {
7055 case 0:
ee314c2a 7056 goto out;
b1f69b75
AA		 7057 case -NFS4ERR_LAYOUTTRYLATER:
7058 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7059 timeo = rpc_get_timeout(task->tk_client);
7060 giveup = lgp->args.timestamp + timeo;
7061 if (time_after(giveup, jiffies))
7062 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 7063 break;
7064 case -NFS4ERR_EXPIRED:
7065 case -NFS4ERR_BAD_STATEID:
7066 spin_lock(&inode->i_lock);
7067 lo = NFS_I(inode)->layout;
7068 if (!lo || list_empty(&lo->plh_segs)) {
7069 spin_unlock(&inode->i_lock);
7070 /* If the open stateid was bad, then recover it. */
7071 state = lgp->args.ctx->state;
7072 } else {
7073 LIST_HEAD(head);
7074
7075 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7076 spin_unlock(&inode->i_lock);
7077 /* Mark the bad layout state as invalid, then
7078 * retry using the open stateid. */
7079 pnfs_free_lseg_list(&head);
b1f69b75
AA		 7080 }
7081 }
ee314c2a
TM		 7082 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
7083 rpc_restart_call_prepare(task);
7084out:
b1f69b75
AA		 7085 dprintk("<-- %s\n", __func__);
7086}
7087
8554116e
IK		 7088static size_t max_response_pages(struct nfs_server *server)
7089{
7090 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7091 return nfs_page_array_len(0, max_resp_sz);
7092}
7093
7094static void nfs4_free_pages(struct page **pages, size_t size)
7095{
7096 int i;
7097
7098 if (!pages)
7099 return;
7100
7101 for (i = 0; i < size; i++) {
7102 if (!pages[i])
7103 break;
7104 __free_page(pages[i]);
7105 }
7106 kfree(pages);
7107}
7108
7109static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7110{
7111 struct page **pages;
7112 int i;
7113
7114 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7115 if (!pages) {
7116 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7117 return NULL;
7118 }
7119
7120 for (i = 0; i < size; i++) {
7121 pages[i] = alloc_page(gfp_flags);
7122 if (!pages[i]) {
7123 dprintk("%s: failed to allocate page\n", __func__);
7124 nfs4_free_pages(pages, size);
7125 return NULL;
7126 }
7127 }
7128
7129 return pages;
7130}
7131
b1f69b75
AA		 7132static void nfs4_layoutget_release(void *calldata)
7133{
7134 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7135 struct inode *inode = lgp->args.inode;
7136 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7137 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7138
7139 dprintk("--> %s\n", __func__);
8554116e 7140 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7141 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7142 put_nfs_open_context(lgp->args.ctx);
7143 kfree(calldata);
7144 dprintk("<-- %s\n", __func__);
7145}
7146
7147static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7148 .rpc_call_prepare = nfs4_layoutget_prepare,
7149 .rpc_call_done = nfs4_layoutget_done,
7150 .rpc_release = nfs4_layoutget_release,
7151};
7152
a0b0a6e3
TM		 7153struct pnfs_layout_segment *
7154nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7155{
a47970ff
WAA		 7156 struct inode *inode = lgp->args.inode;
7157 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7158 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7159 struct rpc_task *task;
7160 struct rpc_message msg = {
7161 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7162 .rpc_argp = &lgp->args,
7163 .rpc_resp = &lgp->res,
6ab59344 7164 .rpc_cred = lgp->cred,
b1f69b75
AA		 7165 };
7166 struct rpc_task_setup task_setup_data = {
7167 .rpc_client = server->client,
7168 .rpc_message = &msg,
7169 .callback_ops = &nfs4_layoutget_call_ops,
7170 .callback_data = lgp,
7171 .flags = RPC_TASK_ASYNC,
7172 };
a0b0a6e3 7173 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7174 int status = 0;
7175
7176 dprintk("--> %s\n", __func__);
7177
8554116e
IK		 7178 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7179 if (!lgp->args.layout.pages) {
7180 nfs4_layoutget_release(lgp);
a0b0a6e3 7181 return ERR_PTR(-ENOMEM);
8554116e
IK		 7182 }
7183 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7184 lgp->args.timestamp = jiffies;
8554116e 7185
35124a09 7186 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7187 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7188 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 7189
7190 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7191 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7192
b1f69b75
AA		 7193 task = rpc_run_task(&task_setup_data);
7194 if (IS_ERR(task))
a0b0a6e3 7195 return ERR_CAST(task);
b1f69b75 7196 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7197 if (status == 0)
7198 status = task->tk_status;
1037e6ea
TM		 7199 trace_nfs4_layoutget(lgp->args.ctx,
7200 &lgp->args.range,
7201 &lgp->res.range,
7202 status);
085b7a45
WAA		 7203 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7204 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7205 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7206 rpc_put_task(task);
7207 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7208 if (status)
7209 return ERR_PTR(status);
7210 return lseg;
b1f69b75
AA		 7211}
7212
cbe82603
BH		 7213static void
7214nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7215{
7216 struct nfs4_layoutreturn *lrp = calldata;
7217
7218 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7219 nfs41_setup_sequence(lrp->clp->cl_session,
7220 &lrp->args.seq_args,
7221 &lrp->res.seq_res,
7222 task);
cbe82603
BH		 7223}
7224
7225static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7226{
7227 struct nfs4_layoutreturn *lrp = calldata;
7228 struct nfs_server *server;
7229
7230 dprintk("--> %s\n", __func__);
7231
6ba7db34 7232 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7233 return;
7234
7235 server = NFS_SERVER(lrp->args.inode);
7236 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 7237 rpc_restart_call_prepare(task);
cbe82603
BH		 7238 return;
7239 }
cbe82603
BH		 7240 dprintk("<-- %s\n", __func__);
7241}
7242
7243static void nfs4_layoutreturn_release(void *calldata)
7244{
7245 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7246 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7247
7248 dprintk("--> %s\n", __func__);
849b286f
TM		 7249 spin_lock(&lo->plh_inode->i_lock);
7250 if (lrp->res.lrs_present)
7251 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7252 lo->plh_block_lgets--;
7253 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7254 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 7255 kfree(calldata);
7256 dprintk("<-- %s\n", __func__);
7257}
7258
7259static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7260 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7261 .rpc_call_done = nfs4_layoutreturn_done,
7262 .rpc_release = nfs4_layoutreturn_release,
7263};
7264
7265int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7266{
7267 struct rpc_task *task;
7268 struct rpc_message msg = {
7269 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7270 .rpc_argp = &lrp->args,
7271 .rpc_resp = &lrp->res,
9556000d 7272 .rpc_cred = lrp->cred,
cbe82603
BH		 7273 };
7274 struct rpc_task_setup task_setup_data = {
1771c577 7275 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7276 .rpc_message = &msg,
7277 .callback_ops = &nfs4_layoutreturn_call_ops,
7278 .callback_data = lrp,
7279 };
7280 int status;
7281
7282 dprintk("--> %s\n", __func__);
a9c92d6b 7283 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7284 task = rpc_run_task(&task_setup_data);
7285 if (IS_ERR(task))
7286 return PTR_ERR(task);
7287 status = task->tk_status;
1037e6ea 7288 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7289 dprintk("<-- %s status=%d\n", __func__, status);
7290 rpc_put_task(task);
7291 return status;
7292}
7293
7f11d8d3
AA		 7294/*
7295 * Retrieve the list of Data Server devices from the MDS.
7296 */
7297static int _nfs4_getdevicelist(struct nfs_server *server,
7298 const struct nfs_fh *fh,
7299 struct pnfs_devicelist *devlist)
7300{
7301 struct nfs4_getdevicelist_args args = {
7302 .fh = fh,
7303 .layoutclass = server->pnfs_curr_ld->id,
7304 };
7305 struct nfs4_getdevicelist_res res = {
7306 .devlist = devlist,
7307 };
7308 struct rpc_message msg = {
7309 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
7310 .rpc_argp = &args,
7311 .rpc_resp = &res,
7312 };
7313 int status;
7314
7315 dprintk("--> %s\n", __func__);
7316 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
7317 &res.seq_res, 0);
7318 dprintk("<-- %s status=%d\n", __func__, status);
7319 return status;
7320}
7321
7322int nfs4_proc_getdevicelist(struct nfs_server *server,
7323 const struct nfs_fh *fh,
7324 struct pnfs_devicelist *devlist)
7325{
7326 struct nfs4_exception exception = { };
7327 int err;
7328
7329 do {
7330 err = nfs4_handle_exception(server,
7331 _nfs4_getdevicelist(server, fh, devlist),
7332 &exception);
7333 } while (exception.retry);
7334
7335 dprintk("%s: err=%d, num_devs=%u\n", __func__,
7336 err, devlist->num_devs);
7337
7338 return err;
7339}
7340EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
7341
b1f69b75 7342static int
cd5875fe
TM		 7343_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7344 struct pnfs_device *pdev,
7345 struct rpc_cred *cred)
b1f69b75
AA		 7346{
7347 struct nfs4_getdeviceinfo_args args = {
7348 .pdev = pdev,
7349 };
7350 struct nfs4_getdeviceinfo_res res = {
7351 .pdev = pdev,
7352 };
7353 struct rpc_message msg = {
7354 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7355 .rpc_argp = &args,
7356 .rpc_resp = &res,
cd5875fe 7357 .rpc_cred = cred,
b1f69b75
AA		 7358 };
7359 int status;
7360
7361 dprintk("--> %s\n", __func__);
7c513058 7362 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7363 dprintk("<-- %s status=%d\n", __func__, status);
7364
7365 return status;
7366}
7367
cd5875fe
TM		 7368int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7369 struct pnfs_device *pdev,
7370 struct rpc_cred *cred)
b1f69b75
AA		 7371{
7372 struct nfs4_exception exception = { };
7373 int err;
7374
7375 do {
7376 err = nfs4_handle_exception(server,
cd5875fe 7377 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7378 &exception);
7379 } while (exception.retry);
7380 return err;
7381}
7382EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7383
863a3c6c
AA		 7384static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7385{
7386 struct nfs4_layoutcommit_data *data = calldata;
7387 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7388 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7389
d9afbd1b
TM		 7390 nfs41_setup_sequence(session,
7391 &data->args.seq_args,
7392 &data->res.seq_res,
7393 task);
863a3c6c
AA		 7394}
7395
7396static void
7397nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7398{
7399 struct nfs4_layoutcommit_data *data = calldata;
7400 struct nfs_server *server = NFS_SERVER(data->args.inode);
7401
6ba7db34 7402 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7403 return;
7404
7405 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7406 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7407 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7408 case -NFS4ERR_BADLAYOUT: /* no layout */
7409 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7410 task->tk_status = 0;
e59d27e0
TM		 7411 break;
7412 case 0:
863a3c6c
AA		 7413 nfs_post_op_update_inode_force_wcc(data->args.inode,
7414 data->res.fattr);
e59d27e0
TM		 7415 break;
7416 default:
7417 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7418 rpc_restart_call_prepare(task);
7419 return;
7420 }
7421 }
863a3c6c
AA		 7422}
7423
7424static void nfs4_layoutcommit_release(void *calldata)
7425{
7426 struct nfs4_layoutcommit_data *data = calldata;
7427
db29c089 7428 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 7429 put_rpccred(data->cred);
7430 kfree(data);
7431}
7432
7433static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7434 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7435 .rpc_call_done = nfs4_layoutcommit_done,
7436 .rpc_release = nfs4_layoutcommit_release,
7437};
7438
7439int
ef311537 7440nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7441{
7442 struct rpc_message msg = {
7443 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7444 .rpc_argp = &data->args,
7445 .rpc_resp = &data->res,
7446 .rpc_cred = data->cred,
7447 };
7448 struct rpc_task_setup task_setup_data = {
7449 .task = &data->task,
7450 .rpc_client = NFS_CLIENT(data->args.inode),
7451 .rpc_message = &msg,
7452 .callback_ops = &nfs4_layoutcommit_ops,
7453 .callback_data = data,
7454 .flags = RPC_TASK_ASYNC,
7455 };
7456 struct rpc_task *task;
7457 int status = 0;
7458
7459 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7460 "lbw: %llu inode %lu\n",
7461 data->task.tk_pid, sync,
7462 data->args.lastbytewritten,
7463 data->args.inode->i_ino);
7464
a9c92d6b 7465 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7466 task = rpc_run_task(&task_setup_data);
7467 if (IS_ERR(task))
7468 return PTR_ERR(task);
ef311537 7469 if (sync == false)
863a3c6c
AA		 7470 goto out;
7471 status = nfs4_wait_for_completion_rpc_task(task);
7472 if (status != 0)
7473 goto out;
7474 status = task->tk_status;
1037e6ea 7475 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7476out:
7477 dprintk("%s: status %d\n", __func__, status);
7478 rpc_put_task(task);
7479 return status;
7480}
fca78d6d 7481
97431204
AA		 7482/**
7483 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7484 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7485 */
fca78d6d
BS		 7486static int
7487_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 7488 struct nfs_fsinfo *info,
7489 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 7490{
7491 struct nfs41_secinfo_no_name_args args = {
7492 .style = SECINFO_STYLE_CURRENT_FH,
7493 };
7494 struct nfs4_secinfo_res res = {
7495 .flavors = flavors,
7496 };
7497 struct rpc_message msg = {
7498 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7499 .rpc_argp = &args,
7500 .rpc_resp = &res,
7501 };
b1b3e136 7502 struct rpc_clnt *clnt = server->client;
7cb852df 7503 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 7504 int status;
7505
7506 if (use_integrity) {
7507 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 7508 cred = nfs4_get_clid_cred(server->nfs_client);
7509 msg.rpc_cred = cred;
b1b3e136
WAA		 7510 }
7511
7512 dprintk("--> %s\n", __func__);
7513 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
7514 &res.seq_res, 0);
7515 dprintk("<-- %s status=%d\n", __func__, status);
7516
7cb852df
WAA		 7517 if (cred)
7518 put_rpccred(cred);
b1b3e136
WAA		 7519
7520 return status;
fca78d6d
BS		 7521}
7522
7523static int
7524nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7525 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7526{
7527 struct nfs4_exception exception = { };
7528 int err;
7529 do {
b1b3e136
WAA		 7530 /* first try using integrity protection */
7531 err = -NFS4ERR_WRONGSEC;
7532
7533 /* try to use integrity protection with machine cred */
7534 if (_nfs4_is_integrity_protected(server->nfs_client))
7535 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7536 flavors, true);
7537
7538 /*
7539 * if unable to use integrity protection, or SECINFO with
7540 * integrity protection returns NFS4ERR_WRONGSEC (which is
7541 * disallowed by spec, but exists in deployed servers) use
7542 * the current filesystem's rpc_client and the user cred.
7543 */
7544 if (err == -NFS4ERR_WRONGSEC)
7545 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7546 flavors, false);
7547
fca78d6d
BS		 7548 switch (err) {
7549 case 0:
7550 case -NFS4ERR_WRONGSEC:
7551 case -NFS4ERR_NOTSUPP:
05e9cfb4 7552 goto out;
fca78d6d
BS		 7553 default:
7554 err = nfs4_handle_exception(server, err, &exception);
7555 }
7556 } while (exception.retry);
05e9cfb4 7557out:
fca78d6d
BS		 7558 return err;
7559}
7560
7561static int
7562nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
7563 struct nfs_fsinfo *info)
7564{
7565 int err;
7566 struct page *page;
7567 rpc_authflavor_t flavor;
7568 struct nfs4_secinfo_flavors *flavors;
7569
7570 page = alloc_page(GFP_KERNEL);
7571 if (!page) {
7572 err = -ENOMEM;
7573 goto out;
7574 }
7575
7576 flavors = page_address(page);
7577 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7578
7579 /*
7580 * Fall back on "guess and check" method if
7581 * the server doesn't support SECINFO_NO_NAME
7582 */
7583 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
7584 err = nfs4_find_root_sec(server, fhandle, info);
7585 goto out_freepage;
7586 }
7587 if (err)
7588 goto out_freepage;
7589
7590 flavor = nfs_find_best_sec(flavors);
7591 if (err == 0)
7592 err = nfs4_lookup_root_sec(server, fhandle, info, flavor);
7593
7594out_freepage:
7595 put_page(page);
7596 if (err == -EACCES)
7597 return -EPERM;
7598out:
7599 return err;
7600}
1cab0652 7601
ab7cb0df
TM		 7602static int _nfs41_test_stateid(struct nfs_server *server,
7603 nfs4_stateid *stateid,
7604 struct rpc_cred *cred)
7d974794
BS		 7605{
7606 int status;
7607 struct nfs41_test_stateid_args args = {
1cab0652 7608 .stateid = stateid,
7d974794
BS		 7609 };
7610 struct nfs41_test_stateid_res res;
7611 struct rpc_message msg = {
7612 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
7613 .rpc_argp = &args,
7614 .rpc_resp = &res,
ab7cb0df 7615 .rpc_cred = cred,
7d974794 7616 };
3787d506
WAA		 7617 struct rpc_clnt *rpc_client = server->client;
7618
7619 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
7620 &rpc_client, &msg);
1cab0652 7621
38527b15 7622 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 7623 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 7624 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 7625 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 7626 &args.seq_args, &res.seq_res);
38527b15
CL		 7627 if (status != NFS_OK) {
7628 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 7629 return status;
38527b15
CL		 7630 }
7631 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 7632 return -res.status;
7d974794
BS		 7633}
7634
38527b15
CL		 7635/**
7636 * nfs41_test_stateid - perform a TEST_STATEID operation
7637 *
7638 * @server: server / transport on which to perform the operation
7639 * @stateid: state ID to test
ab7cb0df 7640 * @cred: credential
38527b15
CL		 7641 *
7642 * Returns NFS_OK if the server recognizes that "stateid" is valid.
7643 * Otherwise a negative NFS4ERR value is returned if the operation
7644 * failed or the state ID is not currently valid.
7645 */
ab7cb0df
TM		 7646static int nfs41_test_stateid(struct nfs_server *server,
7647 nfs4_stateid *stateid,
7648 struct rpc_cred *cred)
7d974794
BS		 7649{
7650 struct nfs4_exception exception = { };
7651 int err;
7652 do {
ab7cb0df 7653 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 7654 if (err != -NFS4ERR_DELAY)
7655 break;
7656 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 7657 } while (exception.retry);
7658 return err;
7659}
9aeda35f 7660
7c1d5fae
TM		 7661struct nfs_free_stateid_data {
7662 struct nfs_server *server;
7663 struct nfs41_free_stateid_args args;
9aeda35f 7664 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 7665};
7666
7667static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
7668{
7669 struct nfs_free_stateid_data *data = calldata;
7670 nfs41_setup_sequence(nfs4_get_session(data->server),
7671 &data->args.seq_args,
7672 &data->res.seq_res,
7673 task);
7674}
7675
7676static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
7677{
7678 struct nfs_free_stateid_data *data = calldata;
7679
7680 nfs41_sequence_done(task, &data->res.seq_res);
7681
7682 switch (task->tk_status) {
7683 case -NFS4ERR_DELAY:
7684 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
7685 rpc_restart_call_prepare(task);
7686 }
7687}
7688
7689static void nfs41_free_stateid_release(void *calldata)
7690{
7691 kfree(calldata);
7692}
7693
17f26b12 7694static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 7695 .rpc_call_prepare = nfs41_free_stateid_prepare,
7696 .rpc_call_done = nfs41_free_stateid_done,
7697 .rpc_release = nfs41_free_stateid_release,
7698};
7699
7700static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
7701 nfs4_stateid *stateid,
ab7cb0df 7702 struct rpc_cred *cred,
7c1d5fae
TM		 7703 bool privileged)
7704{
9aeda35f
BS		 7705 struct rpc_message msg = {
7706 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 7707 .rpc_cred = cred,
9aeda35f 7708 };
7c1d5fae
TM		 7709 struct rpc_task_setup task_setup = {
7710 .rpc_client = server->client,
7711 .rpc_message = &msg,
7712 .callback_ops = &nfs41_free_stateid_ops,
7713 .flags = RPC_TASK_ASYNC,
7714 };
7715 struct nfs_free_stateid_data *data;
9aeda35f 7716
3787d506
WAA		 7717 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
7718 &task_setup.rpc_client, &msg);
7719
38527b15 7720 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 7721 data = kmalloc(sizeof(*data), GFP_NOFS);
7722 if (!data)
7723 return ERR_PTR(-ENOMEM);
7724 data->server = server;
7725 nfs4_stateid_copy(&data->args.stateid, stateid);
7726
7727 task_setup.callback_data = data;
7728
7729 msg.rpc_argp = &data->args;
7730 msg.rpc_resp = &data->res;
a9c92d6b 7731 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 7732 if (privileged)
7733 nfs4_set_sequence_privileged(&data->args.seq_args);
7734
7735 return rpc_run_task(&task_setup);
9aeda35f
BS		 7736}
7737
38527b15
CL		 7738/**
7739 * nfs41_free_stateid - perform a FREE_STATEID operation
7740 *
7741 * @server: server / transport on which to perform the operation
7742 * @stateid: state ID to release
ab7cb0df 7743 * @cred: credential
38527b15
CL		 7744 *
7745 * Returns NFS_OK if the server freed "stateid". Otherwise a
7746 * negative NFS4ERR value is returned.
7747 */
ab7cb0df
TM		 7748static int nfs41_free_stateid(struct nfs_server *server,
7749 nfs4_stateid *stateid,
7750 struct rpc_cred *cred)
9aeda35f 7751{
7c1d5fae
TM		 7752 struct rpc_task *task;
7753 int ret;
7754
ab7cb0df 7755 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 7756 if (IS_ERR(task))
7757 return PTR_ERR(task);
7758 ret = rpc_wait_for_completion_task(task);
7759 if (!ret)
7760 ret = task->tk_status;
7761 rpc_put_task(task);
7762 return ret;
9aeda35f 7763}
36281caa 7764
c8b2d0bf
TM		 7765static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
7766{
7767 struct rpc_task *task;
ab7cb0df 7768 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 7769
ab7cb0df 7770 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 7771 nfs4_free_lock_state(server, lsp);
7772 if (IS_ERR(task))
7773 return PTR_ERR(task);
7774 rpc_put_task(task);
7775 return 0;
7776}
7777
36281caa
TM		 7778static bool nfs41_match_stateid(const nfs4_stateid *s1,
7779 const nfs4_stateid *s2)
7780{
2d2f24ad 7781 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 7782 return false;
7783
2d2f24ad 7784 if (s1->seqid == s2->seqid)
36281caa 7785 return true;
2d2f24ad 7786 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 7787 return true;
7788
7789 return false;
7790}
7791
557134a3
AA		 7792#endif /* CONFIG_NFS_V4_1 */
7793
36281caa
TM		 7794static bool nfs4_match_stateid(const nfs4_stateid *s1,
7795 const nfs4_stateid *s2)
7796{
f597c537 7797 return nfs4_stateid_match(s1, s2);
36281caa
TM		 7798}
7799
7800
17280175 7801static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 7802 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 7803 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 7804 .recover_open = nfs4_open_reclaim,
7805 .recover_lock = nfs4_lock_reclaim,
591d71cb 7806 .establish_clid = nfs4_init_clientid,
05f4c350 7807 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 7808};
7809
591d71cb 7810#if defined(CONFIG_NFS_V4_1)
17280175 7811static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 7812 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
7813 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
7814 .recover_open = nfs4_open_reclaim,
7815 .recover_lock = nfs4_lock_reclaim,
4d643d1d 7816 .establish_clid = nfs41_init_clientid,
fce5c838 7817 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 7818 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 7819};
7820#endif /* CONFIG_NFS_V4_1 */
7821
17280175 7822static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 7823 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
7824 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
7825 .recover_open = nfs4_open_expired,
7826 .recover_lock = nfs4_lock_expired,
7827 .establish_clid = nfs4_init_clientid,
7828};
7829
7830#if defined(CONFIG_NFS_V4_1)
17280175 7831static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 7832 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 7833 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 7834 .recover_open = nfs41_open_expired,
7835 .recover_lock = nfs41_lock_expired,
4d643d1d 7836 .establish_clid = nfs41_init_clientid,
1da177e4 7837};
591d71cb 7838#endif /* CONFIG_NFS_V4_1 */
1da177e4 7839
17280175 7840static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 7841 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 7842 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 7843 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 7844};
7845
7846#if defined(CONFIG_NFS_V4_1)
17280175 7847static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 7848 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 7849 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 7850 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 7851};
7852#endif
7853
97dc1359
TM		 7854static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
7855 .minor_version = 0,
39c6daae
TM		 7856 .init_caps = NFS_CAP_READDIRPLUS
7857 | NFS_CAP_ATOMIC_OPEN
7858 | NFS_CAP_CHANGE_ATTR
7859 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 7860 .init_client = nfs40_init_client,
7861 .shutdown_client = nfs40_shutdown_client,
36281caa 7862 .match_stateid = nfs4_match_stateid,
fca78d6d 7863 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 7864 .free_lock_state = nfs4_release_lockowner,
9915ea7e 7865 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 7866 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
7867 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
7868 .state_renewal_ops = &nfs40_state_renewal_ops,
97dc1359
TM		 7869};
7870
7871#if defined(CONFIG_NFS_V4_1)
7872static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
7873 .minor_version = 1,
39c6daae
TM		 7874 .init_caps = NFS_CAP_READDIRPLUS
7875 | NFS_CAP_ATOMIC_OPEN
7876 | NFS_CAP_CHANGE_ATTR
3b66486c 7877 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 7878 | NFS_CAP_STATEID_NFSV41
7879 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 7880 .init_client = nfs41_init_client,
7881 .shutdown_client = nfs41_shutdown_client,
36281caa 7882 .match_stateid = nfs41_match_stateid,
fca78d6d 7883 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 7884 .free_lock_state = nfs41_free_lock_state,
9915ea7e 7885 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 7886 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7887 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7888 .state_renewal_ops = &nfs41_state_renewal_ops,
97dc1359
TM		 7889};
7890#endif
7891
42c2c424
SD		 7892#if defined(CONFIG_NFS_V4_2)
7893static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
7894 .minor_version = 2,
7017310a
BS		 7895 .init_caps = NFS_CAP_READDIRPLUS
7896 | NFS_CAP_ATOMIC_OPEN
7897 | NFS_CAP_CHANGE_ATTR
7898 | NFS_CAP_POSIX_LOCK
7899 | NFS_CAP_STATEID_NFSV41
7900 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 7901 .init_client = nfs41_init_client,
7902 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 7903 .match_stateid = nfs41_match_stateid,
7904 .find_root_sec = nfs41_find_root_sec,
7017310a 7905 .free_lock_state = nfs41_free_lock_state,
9915ea7e 7906 .call_sync_ops = &nfs41_call_sync_ops,
42c2c424
SD		 7907 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
7908 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
7909 .state_renewal_ops = &nfs41_state_renewal_ops,
7910};
7911#endif
7912
97dc1359
TM		 7913const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
7914 [0] = &nfs_v4_0_minor_ops,
7915#if defined(CONFIG_NFS_V4_1)
7916 [1] = &nfs_v4_1_minor_ops,
7917#endif
42c2c424
SD		 7918#if defined(CONFIG_NFS_V4_2)
7919 [2] = &nfs_v4_2_minor_ops,
7920#endif
97dc1359
TM		 7921};
7922
17f26b12 7923static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 7924 .create = nfs_create,
7925 .lookup = nfs_lookup,
7926 .atomic_open = nfs_atomic_open,
7927 .link = nfs_link,
7928 .unlink = nfs_unlink,
7929 .symlink = nfs_symlink,
7930 .mkdir = nfs_mkdir,
7931 .rmdir = nfs_rmdir,
7932 .mknod = nfs_mknod,
7933 .rename = nfs_rename,
7934 .permission = nfs_permission,
7935 .getattr = nfs_getattr,
7936 .setattr = nfs_setattr,
7937 .getxattr = generic_getxattr,
7938 .setxattr = generic_setxattr,
7939 .listxattr = generic_listxattr,
7940 .removexattr = generic_removexattr,
7941};
7942
92e1d5be 7943static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 7944 .permission = nfs_permission,
7945 .getattr = nfs_getattr,
7946 .setattr = nfs_setattr,
64c2ce8b
AK		 7947 .getxattr = generic_getxattr,
7948 .setxattr = generic_setxattr,
7949 .listxattr = generic_listxattr,
7950 .removexattr = generic_removexattr,
6b3b5496
BF		 7951};
7952
509de811 7953const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 7954 .version = 4, /* protocol version */
7955 .dentry_ops = &nfs4_dentry_operations,
7956 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 7957 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 7958 .file_ops = &nfs4_file_operations,
1da177e4 7959 .getroot = nfs4_proc_get_root,
281cad46 7960 .submount = nfs4_submount,
ff9099f2 7961 .try_mount = nfs4_try_mount,
1da177e4
LT		 7962 .getattr = nfs4_proc_getattr,
7963 .setattr = nfs4_proc_setattr,
7964 .lookup = nfs4_proc_lookup,
7965 .access = nfs4_proc_access,
7966 .readlink = nfs4_proc_readlink,
1da177e4
LT		 7967 .create = nfs4_proc_create,
7968 .remove = nfs4_proc_remove,
7969 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 7970 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 7971 .unlink_done = nfs4_proc_unlink_done,
7972 .rename = nfs4_proc_rename,
d3d4152a 7973 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 7974 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 7975 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 7976 .link = nfs4_proc_link,
7977 .symlink = nfs4_proc_symlink,
7978 .mkdir = nfs4_proc_mkdir,
7979 .rmdir = nfs4_proc_remove,
7980 .readdir = nfs4_proc_readdir,
7981 .mknod = nfs4_proc_mknod,
7982 .statfs = nfs4_proc_statfs,
7983 .fsinfo = nfs4_proc_fsinfo,
7984 .pathconf = nfs4_proc_pathconf,
e9326dca 7985 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 7986 .decode_dirent = nfs4_decode_dirent,
7987 .read_setup = nfs4_proc_read_setup,
1abb5088 7988 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 7989 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 7990 .read_done = nfs4_read_done,
1da177e4 7991 .write_setup = nfs4_proc_write_setup,
57208fa7 7992 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 7993 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 7994 .write_done = nfs4_write_done,
1da177e4 7995 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 7996 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 7997 .commit_done = nfs4_commit_done,
1da177e4 7998 .lock = nfs4_proc_lock,
e50a1c2e 7999 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8000 .close_context = nfs4_close_context,
2b484297 8001 .open_context = nfs4_atomic_open,
011e2a7f 8002 .have_delegation = nfs4_have_delegation,
57ec14c5 8003 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8004 .alloc_client = nfs4_alloc_client,
45a52a02 8005 .init_client = nfs4_init_client,
cdb7eced 8006 .free_client = nfs4_free_client,
1179acc6
BS		 8007 .create_server = nfs4_create_server,
8008 .clone_server = nfs_clone_server,
1da177e4
LT		 8009};
8010
64c2ce8b
AK		 8011static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8012 .prefix = XATTR_NAME_NFSV4_ACL,
8013 .list = nfs4_xattr_list_nfs4_acl,
8014 .get = nfs4_xattr_get_nfs4_acl,
8015 .set = nfs4_xattr_set_nfs4_acl,
8016};
8017
8018const struct xattr_handler *nfs4_xattr_handlers[] = {
8019 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8020#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8021 &nfs4_xattr_nfs4_label_handler,
8022#endif
64c2ce8b
AK		 8023 NULL
8024};
8025
1da177e4
LT		 8026/*
8027 * Local variables:
8028 * c-basic-offset: 8
8029 * End:
8030 */
Linux 6.x block layer and io_uring tree(s)