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Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[mirror_ubuntu-bionic-kernel.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4 68
c6d01c6f
TM		 69#include "nfs4trace.h"
70
1da177e4
LT		 71#define NFSDBG_FACILITY NFSDBG_PROC
72
2066fe89 73#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 74#define NFS4_POLL_RETRY_MAX (15*HZ)
75
cdd4e68b 76struct nfs4_opendata;
864472e9 77static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 78static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 79static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
8478eaa1 80static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *, long *);
81934ddb 81static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 82static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
83static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 84static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 86 struct nfs4_state *state, struct nfs4_label *ilabel,
87 struct nfs4_label *olabel);
f062eb6c 88#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 89static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
90 struct rpc_cred *);
91static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
92 struct rpc_cred *);
f062eb6c 93#endif
aa9c2669
DQ		 94
95#ifdef CONFIG_NFS_V4_SECURITY_LABEL
96static inline struct nfs4_label *
97nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
98 struct iattr *sattr, struct nfs4_label *label)
99{
100 int err;
101
102 if (label == NULL)
103 return NULL;
104
105 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
106 return NULL;
107
aa9c2669
DQ		 108 err = security_dentry_init_security(dentry, sattr->ia_mode,
109 &dentry->d_name, (void **)&label->label, &label->len);
110 if (err == 0)
111 return label;
112
113 return NULL;
114}
115static inline void
116nfs4_label_release_security(struct nfs4_label *label)
117{
118 if (label)
119 security_release_secctx(label->label, label->len);
120}
121static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
122{
123 if (label)
124 return server->attr_bitmask;
125
126 return server->attr_bitmask_nl;
127}
128#else
129static inline struct nfs4_label *
130nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
131 struct iattr *sattr, struct nfs4_label *l)
132{ return NULL; }
133static inline void
134nfs4_label_release_security(struct nfs4_label *label)
135{ return; }
136static inline u32 *
137nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
138{ return server->attr_bitmask; }
139#endif
140
1da177e4 141/* Prevent leaks of NFSv4 errors into userland */
46f72f57 142static int nfs4_map_errors(int err)
1da177e4 143{
52567b03
TM		 144 if (err >= -1000)
145 return err;
146 switch (err) {
147 case -NFS4ERR_RESOURCE:
30005121
WAA		 148 case -NFS4ERR_LAYOUTTRYLATER:
149 case -NFS4ERR_RECALLCONFLICT:
52567b03 150 return -EREMOTEIO;
7ebb9315 151 case -NFS4ERR_WRONGSEC:
8897538e 152 case -NFS4ERR_WRONG_CRED:
7ebb9315 153 return -EPERM;
3ddeb7c5
TM		 154 case -NFS4ERR_BADOWNER:
155 case -NFS4ERR_BADNAME:
156 return -EINVAL;
fb13bfa7
TM		 157 case -NFS4ERR_SHARE_DENIED:
158 return -EACCES;
f25efd85
SD		 159 case -NFS4ERR_MINOR_VERS_MISMATCH:
160 return -EPROTONOSUPPORT;
6168f62c
WAA		 161 case -NFS4ERR_ACCESS:
162 return -EACCES;
6e3cf241
TM		 163 case -NFS4ERR_FILE_OPEN:
164 return -EBUSY;
52567b03 165 default:
1da177e4 166 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 167 __func__, -err);
52567b03 168 break;
1da177e4 169 }
52567b03 170 return -EIO;
1da177e4
LT		 171}
172
173/*
174 * This is our standard bitmap for GETATTR requests.
175 */
1549210f 176const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 177 FATTR4_WORD0_TYPE
178 | FATTR4_WORD0_CHANGE
179 | FATTR4_WORD0_SIZE
180 | FATTR4_WORD0_FSID
181 | FATTR4_WORD0_FILEID,
182 FATTR4_WORD1_MODE
183 | FATTR4_WORD1_NUMLINKS
184 | FATTR4_WORD1_OWNER
185 | FATTR4_WORD1_OWNER_GROUP
186 | FATTR4_WORD1_RAWDEV
187 | FATTR4_WORD1_SPACE_USED
188 | FATTR4_WORD1_TIME_ACCESS
189 | FATTR4_WORD1_TIME_METADATA
aa9c2669
DQ		 190 | FATTR4_WORD1_TIME_MODIFY,
191#ifdef CONFIG_NFS_V4_SECURITY_LABEL
192 FATTR4_WORD2_SECURITY_LABEL
193#endif
1da177e4
LT		 194};
195
1549210f
TM		 196static const u32 nfs4_pnfs_open_bitmap[3] = {
197 FATTR4_WORD0_TYPE
198 | FATTR4_WORD0_CHANGE
199 | FATTR4_WORD0_SIZE
200 | FATTR4_WORD0_FSID
201 | FATTR4_WORD0_FILEID,
202 FATTR4_WORD1_MODE
203 | FATTR4_WORD1_NUMLINKS
204 | FATTR4_WORD1_OWNER
205 | FATTR4_WORD1_OWNER_GROUP
206 | FATTR4_WORD1_RAWDEV
207 | FATTR4_WORD1_SPACE_USED
208 | FATTR4_WORD1_TIME_ACCESS
209 | FATTR4_WORD1_TIME_METADATA
210 | FATTR4_WORD1_TIME_MODIFY,
211 FATTR4_WORD2_MDSTHRESHOLD
212};
213
e23008ec
AA		 214static const u32 nfs4_open_noattr_bitmap[3] = {
215 FATTR4_WORD0_TYPE
216 | FATTR4_WORD0_CHANGE
217 | FATTR4_WORD0_FILEID,
218};
219
a09df2ca 220const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 221 FATTR4_WORD0_FILES_AVAIL
222 | FATTR4_WORD0_FILES_FREE
223 | FATTR4_WORD0_FILES_TOTAL,
224 FATTR4_WORD1_SPACE_AVAIL
225 | FATTR4_WORD1_SPACE_FREE
226 | FATTR4_WORD1_SPACE_TOTAL
227};
228
a09df2ca 229const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 230 FATTR4_WORD0_MAXLINK
231 | FATTR4_WORD0_MAXNAME,
232 0
233};
234
dae100c2 235const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 236 | FATTR4_WORD0_MAXREAD
237 | FATTR4_WORD0_MAXWRITE
238 | FATTR4_WORD0_LEASE_TIME,
55b6e774 239 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 240 | FATTR4_WORD1_FS_LAYOUT_TYPES,
241 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 242};
243
a09df2ca 244const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 245 FATTR4_WORD0_TYPE
246 | FATTR4_WORD0_CHANGE
247 | FATTR4_WORD0_SIZE
248 | FATTR4_WORD0_FSID
249 | FATTR4_WORD0_FILEID
250 | FATTR4_WORD0_FS_LOCATIONS,
251 FATTR4_WORD1_MODE
252 | FATTR4_WORD1_NUMLINKS
253 | FATTR4_WORD1_OWNER
254 | FATTR4_WORD1_OWNER_GROUP
255 | FATTR4_WORD1_RAWDEV
256 | FATTR4_WORD1_SPACE_USED
257 | FATTR4_WORD1_TIME_ACCESS
258 | FATTR4_WORD1_TIME_METADATA
259 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 260 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 261};
262
bc4785cd 263static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 264 struct nfs4_readdir_arg *readdir)
265{
0dbb4c67 266 __be32 *start, *p;
1da177e4 267
1da177e4 268 if (cookie > 2) {
b7ef1956 269 readdir->cookie = cookie;
1da177e4
LT		 270 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
271 return;
272 }
273
274 readdir->cookie = 0;
275 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
276 if (cookie == 2)
277 return;
278
279 /*
280 * NFSv4 servers do not return entries for '.' and '..'
281 * Therefore, we fake these entries here. We let '.'
282 * have cookie 0 and '..' have cookie 1. Note that
283 * when talking to the server, we always send cookie 0
284 * instead of 1 or 2.
285 */
2b86ce2d 286 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 287
288 if (cookie == 0) {
289 *p++ = xdr_one; /* next */
290 *p++ = xdr_zero; /* cookie, first word */
291 *p++ = xdr_one; /* cookie, second word */
292 *p++ = xdr_one; /* entry len */
293 memcpy(p, ".\0\0\0", 4); /* entry */
294 p++;
295 *p++ = xdr_one; /* bitmap length */
296 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
297 *p++ = htonl(8); /* attribute buffer length */
4e769b93 298 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 299 }
300
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_two; /* cookie, second word */
304 *p++ = xdr_two; /* entry len */
305 memcpy(p, "..\0\0", 4); /* entry */
306 p++;
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
4e769b93 310 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 311
312 readdir->pgbase = (char *)p - (char *)start;
313 readdir->count -= readdir->pgbase;
2b86ce2d 314 kunmap_atomic(start);
1da177e4
LT		 315}
316
8478eaa1
N		 317static long nfs4_update_delay(long *timeout)
318{
319 long ret;
320 if (!timeout)
321 return NFS4_POLL_RETRY_MAX;
322 if (*timeout <= 0)
323 *timeout = NFS4_POLL_RETRY_MIN;
324 if (*timeout > NFS4_POLL_RETRY_MAX)
325 *timeout = NFS4_POLL_RETRY_MAX;
326 ret = *timeout;
327 *timeout <<= 1;
328 return ret;
329}
330
65de872e
TM		 331static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
332{
333 int res = 0;
334
335 might_sleep();
336
8478eaa1
N		 337 freezable_schedule_timeout_killable_unsafe(
338 nfs4_update_delay(timeout));
65de872e
TM		 339 if (fatal_signal_pending(current))
340 res = -ERESTARTSYS;
65de872e
TM		 341 return res;
342}
343
344/* This is the error handling routine for processes that are allowed
345 * to sleep.
346 */
b064eca2 347static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 348{
349 struct nfs_client *clp = server->nfs_client;
9e33bed5 350 struct nfs4_state *state = exception->state;
3114ea7a 351 struct inode *inode = exception->inode;
65de872e
TM		 352 int ret = errorcode;
353
354 exception->retry = 0;
355 switch(errorcode) {
356 case 0:
357 return 0;
3114ea7a 358 case -NFS4ERR_OPENMODE:
011e2a7f 359 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 360 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 361 exception->retry = 1;
362 return 0;
363 }
364 if (state == NULL)
365 break;
5d422301
TM		 366 ret = nfs4_schedule_stateid_recovery(server, state);
367 if (ret < 0)
368 break;
3114ea7a 369 goto wait_on_recovery;
a1d0b5ee 370 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 371 case -NFS4ERR_ADMIN_REVOKED:
372 case -NFS4ERR_BAD_STATEID:
9e33bed5
TM		 373 if (state == NULL)
374 break;
5d422301
TM		 375 ret = nfs4_schedule_stateid_recovery(server, state);
376 if (ret < 0)
377 break;
0400a6b0 378 goto wait_on_recovery;
0ced63d1 379 case -NFS4ERR_EXPIRED:
5d422301
TM		 380 if (state != NULL) {
381 ret = nfs4_schedule_stateid_recovery(server, state);
382 if (ret < 0)
383 break;
384 }
65de872e 385 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 386 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 387 nfs4_schedule_lease_recovery(clp);
388 goto wait_on_recovery;
519ae255
CL		 389 case -NFS4ERR_MOVED:
390 ret = nfs4_schedule_migration_recovery(server);
391 if (ret < 0)
392 break;
393 goto wait_on_recovery;
8ef2f8d4
CL		 394 case -NFS4ERR_LEASE_MOVED:
395 nfs4_schedule_lease_moved_recovery(clp);
396 goto wait_on_recovery;
03391693 397#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 398 case -NFS4ERR_BADSESSION:
399 case -NFS4ERR_BADSLOT:
400 case -NFS4ERR_BAD_HIGH_SLOT:
401 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
402 case -NFS4ERR_DEADSESSION:
403 case -NFS4ERR_SEQ_FALSE_RETRY:
404 case -NFS4ERR_SEQ_MISORDERED:
405 dprintk("%s ERROR: %d Reset session\n", __func__,
406 errorcode);
9f594791 407 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 408 goto wait_on_recovery;
03391693 409#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 410 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 411 if (exception->timeout > HZ) {
412 /* We have retried a decent amount, time to
413 * fail
414 */
415 ret = -EBUSY;
416 break;
417 }
65de872e
TM		 418 case -NFS4ERR_GRACE:
419 case -NFS4ERR_DELAY:
420 ret = nfs4_delay(server->client, &exception->timeout);
421 if (ret != 0)
422 break;
a8a4ae3a 423 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 424 case -NFS4ERR_OLD_STATEID:
425 exception->retry = 1;
b064eca2
TM		 426 break;
427 case -NFS4ERR_BADOWNER:
428 /* The following works around a Linux server bug! */
429 case -NFS4ERR_BADNAME:
430 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
431 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
432 exception->retry = 1;
433 printk(KERN_WARNING "NFS: v4 server %s "
434 "does not accept raw "
435 "uid/gids. "
436 "Reenabling the idmapper.\n",
437 server->nfs_client->cl_hostname);
438 }
65de872e
TM		 439 }
440 /* We failed to handle the error */
441 return nfs4_map_errors(ret);
0400a6b0 442wait_on_recovery:
a2c0b9e2 443 ret = nfs4_wait_clnt_recover(clp);
519ae255
CL		 444 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
445 return -EIO;
a2c0b9e2
TM		 446 if (ret == 0)
447 exception->retry = 1;
448 return ret;
65de872e
TM		 449}
450
a5250def
WAA		 451/*
452 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
453 * or 'false' otherwise.
454 */
455static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
456{
457 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
458
459 if (flavor == RPC_AUTH_GSS_KRB5I ||
460 flavor == RPC_AUTH_GSS_KRB5P)
461 return true;
462
463 return false;
464}
65de872e 465
452e9352 466static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 467{
1da177e4
LT		 468 spin_lock(&clp->cl_lock);
469 if (time_before(clp->cl_last_renewal,timestamp))
470 clp->cl_last_renewal = timestamp;
471 spin_unlock(&clp->cl_lock);
472}
473
452e9352
TM		 474static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
475{
476 do_renew_lease(server->nfs_client, timestamp);
477}
478
2a3eb2b9
CL		 479struct nfs4_call_sync_data {
480 const struct nfs_server *seq_server;
481 struct nfs4_sequence_args *seq_args;
482 struct nfs4_sequence_res *seq_res;
483};
484
a9c92d6b
CL		 485static void nfs4_init_sequence(struct nfs4_sequence_args *args,
486 struct nfs4_sequence_res *res, int cache_reply)
487{
488 args->sa_slot = NULL;
489 args->sa_cache_this = cache_reply;
490 args->sa_privileged = 0;
491
492 res->sr_slot = NULL;
493}
494
495static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
496{
497 args->sa_privileged = 1;
498}
499
3bd2384a
CL		 500static int nfs40_setup_sequence(const struct nfs_server *server,
501 struct nfs4_sequence_args *args,
502 struct nfs4_sequence_res *res,
503 struct rpc_task *task)
504{
505 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
506 struct nfs4_slot *slot;
507
508 /* slot already allocated? */
509 if (res->sr_slot != NULL)
510 goto out_start;
511
512 spin_lock(&tbl->slot_tbl_lock);
513 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
514 goto out_sleep;
515
516 slot = nfs4_alloc_slot(tbl);
517 if (IS_ERR(slot)) {
518 if (slot == ERR_PTR(-ENOMEM))
519 task->tk_timeout = HZ >> 2;
520 goto out_sleep;
521 }
522 spin_unlock(&tbl->slot_tbl_lock);
523
524 args->sa_slot = slot;
525 res->sr_slot = slot;
526
527out_start:
528 rpc_call_start(task);
529 return 0;
530
531out_sleep:
532 if (args->sa_privileged)
533 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
534 NULL, RPC_PRIORITY_PRIVILEGED);
535 else
536 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
537 spin_unlock(&tbl->slot_tbl_lock);
538 return -EAGAIN;
539}
540
541static int nfs40_sequence_done(struct rpc_task *task,
542 struct nfs4_sequence_res *res)
543{
544 struct nfs4_slot *slot = res->sr_slot;
545 struct nfs4_slot_table *tbl;
546
cab92c19 547 if (slot == NULL)
3bd2384a
CL		 548 goto out;
549
550 tbl = slot->table;
551 spin_lock(&tbl->slot_tbl_lock);
552 if (!nfs41_wake_and_assign_slot(tbl, slot))
553 nfs4_free_slot(tbl, slot);
554 spin_unlock(&tbl->slot_tbl_lock);
555
556 res->sr_slot = NULL;
557out:
558 return 1;
559}
560
cccef3b9
AA		 561#if defined(CONFIG_NFS_V4_1)
562
d185a334 563static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 564{
e3725ec0 565 struct nfs4_session *session;
13615871 566 struct nfs4_slot_table *tbl;
a13ce7c6 567 struct nfs4_slot *slot = res->sr_slot;
c10e4498 568 bool send_new_highest_used_slotid = false;
13615871 569
a13ce7c6 570 tbl = slot->table;
e3725ec0 571 session = tbl->session;
ea028ac9 572
35dc1d74 573 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 574 /* Be nice to the server: try to ensure that the last transmitted
575 * value for highest_user_slotid <= target_highest_slotid
576 */
577 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
578 send_new_highest_used_slotid = true;
579
a13ce7c6 580 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 581 send_new_highest_used_slotid = false;
582 goto out_unlock;
583 }
a13ce7c6 584 nfs4_free_slot(tbl, slot);
c10e4498
TM		 585
586 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
587 send_new_highest_used_slotid = false;
b75ad4cd 588out_unlock:
35dc1d74 589 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 590 res->sr_slot = NULL;
c10e4498
TM		 591 if (send_new_highest_used_slotid)
592 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 593}
594
f9c96fcc 595int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 596{
e3725ec0 597 struct nfs4_session *session;
a13ce7c6 598 struct nfs4_slot *slot = res->sr_slot;
14516c3a 599 struct nfs_client *clp;
ac20d163 600 bool interrupted = false;
85563073 601 int ret = 1;
b0df806c 602
a13ce7c6
TM		 603 if (slot == NULL)
604 goto out_noaction;
468f8613
BS		 605 /* don't increment the sequence number if the task wasn't sent */
606 if (!RPC_WAS_SENT(task))
b0df806c
AA		 607 goto out;
608
e3725ec0 609 session = slot->table->session;
933602e3 610
ac20d163
TM		 611 if (slot->interrupted) {
612 slot->interrupted = 0;
613 interrupted = true;
614 }
615
2f92ae34 616 trace_nfs4_sequence_done(session, res);
691daf3b 617 /* Check the SEQUENCE operation status */
14516c3a
TM		 618 switch (res->sr_status) {
619 case 0:
b0df806c 620 /* Update the slot's sequence and clientid lease timer */
933602e3 621 ++slot->seq_nr;
e3725ec0 622 clp = session->clp;
8e63b6a8 623 do_renew_lease(clp, res->sr_timestamp);
0629e370 624 /* Check sequence flags */
b4410c2f
TM		 625 if (res->sr_status_flags != 0)
626 nfs4_schedule_lease_recovery(clp);
464ee9f9 627 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 628 break;
ac20d163
TM		 629 case 1:
630 /*
631 * sr_status remains 1 if an RPC level error occurred.
632 * The server may or may not have processed the sequence
633 * operation..
634 * Mark the slot as having hosted an interrupted RPC call.
635 */
636 slot->interrupted = 1;
637 goto out;
14516c3a
TM		 638 case -NFS4ERR_DELAY:
639 /* The server detected a resend of the RPC call and
640 * returned NFS4ERR_DELAY as per Section 2.10.6.2
641 * of RFC5661.
642 */
df2fabff 643 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 644 __func__,
df2fabff 645 slot->slot_nr,
933602e3 646 slot->seq_nr);
14516c3a 647 goto out_retry;
85563073
TM		 648 case -NFS4ERR_BADSLOT:
649 /*
650 * The slot id we used was probably retired. Try again
651 * using a different slot id.
652 */
e8794440
TM		 653 goto retry_nowait;
654 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 655 /*
656 * Was the last operation on this sequence interrupted?
657 * If so, retry after bumping the sequence number.
658 */
659 if (interrupted) {
660 ++slot->seq_nr;
661 goto retry_nowait;
662 }
e8794440
TM		 663 /*
664 * Could this slot have been previously retired?
665 * If so, then the server may be expecting seq_nr = 1!
666 */
8e63b6a8
TM		 667 if (slot->seq_nr != 1) {
668 slot->seq_nr = 1;
669 goto retry_nowait;
670 }
671 break;
e8794440
TM		 672 case -NFS4ERR_SEQ_FALSE_RETRY:
673 ++slot->seq_nr;
674 goto retry_nowait;
14516c3a
TM		 675 default:
676 /* Just update the slot sequence no. */
933602e3 677 ++slot->seq_nr;
b0df806c
AA		 678 }
679out:
680 /* The session may be reset by one of the error handlers. */
681 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 682 nfs41_sequence_free_slot(res);
a13ce7c6 683out_noaction:
85563073 684 return ret;
e8794440
TM		 685retry_nowait:
686 if (rpc_restart_call_prepare(task)) {
687 task->tk_status = 0;
688 ret = 0;
689 }
690 goto out;
14516c3a 691out_retry:
d05dd4e9 692 if (!rpc_restart_call(task))
14516c3a
TM		 693 goto out;
694 rpc_delay(task, NFS4_POLL_RETRY_MAX);
695 return 0;
b0df806c 696}
f9c96fcc 697EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 698
14516c3a
TM		 699static int nfs4_sequence_done(struct rpc_task *task,
700 struct nfs4_sequence_res *res)
df896455 701{
e3725ec0 702 if (res->sr_slot == NULL)
14516c3a 703 return 1;
3bd2384a
CL		 704 if (!res->sr_slot->table->session)
705 return nfs40_sequence_done(task, res);
14516c3a 706 return nfs41_sequence_done(task, res);
df896455
TM		 707}
708
dc70d7b3 709int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 710 struct nfs4_sequence_args *args,
711 struct nfs4_sequence_res *res,
ce5039c1
AA		 712 struct rpc_task *task)
713{
fbcd4abc
AA		 714 struct nfs4_slot *slot;
715 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 716
717 dprintk("--> %s\n", __func__);
ce5039c1 718 /* slot already allocated? */
dfb4f309 719 if (res->sr_slot != NULL)
d9afbd1b 720 goto out_success;
ce5039c1 721
fbcd4abc
AA		 722 tbl = &session->fc_slot_table;
723
69d206b5
TM		 724 task->tk_timeout = 0;
725
fbcd4abc 726 spin_lock(&tbl->slot_tbl_lock);
774d5f14 727 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 728 !args->sa_privileged) {
0b1c8fc4 729 /* The state manager will wait until the slot table is empty */
0b1c8fc4 730 dprintk("%s session is draining\n", __func__);
7b939a3f 731 goto out_sleep;
689cf5c1
AB		 732 }
733
2dc03b7f 734 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 735 if (IS_ERR(slot)) {
736 /* If out of memory, try again in 1/4 second */
737 if (slot == ERR_PTR(-ENOMEM))
738 task->tk_timeout = HZ >> 2;
fbcd4abc 739 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 740 goto out_sleep;
fbcd4abc
AA		 741 }
742 spin_unlock(&tbl->slot_tbl_lock);
743
2b2fa717 744 args->sa_slot = slot;
fbcd4abc 745
e8d92382 746 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 747 slot->slot_nr, slot->seq_nr);
fbcd4abc 748
dfb4f309 749 res->sr_slot = slot;
8e63b6a8 750 res->sr_timestamp = jiffies;
2a6e26cd 751 res->sr_status_flags = 0;
fbcd4abc
AA		 752 /*
753 * sr_status is only set in decode_sequence, and so will remain
754 * set to 1 if an rpc level failure occurs.
755 */
756 res->sr_status = 1;
2f92ae34 757 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 758out_success:
759 rpc_call_start(task);
ce5039c1 760 return 0;
7b939a3f 761out_sleep:
8fe72bac
TM		 762 /* Privileged tasks are queued with top priority */
763 if (args->sa_privileged)
1e1093c7
TM		 764 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
765 NULL, RPC_PRIORITY_PRIVILEGED);
766 else
767 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 768 spin_unlock(&tbl->slot_tbl_lock);
769 return -EAGAIN;
ce5039c1 770}
dc70d7b3 771EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 772
5a580e0a
CL		 773static int nfs4_setup_sequence(const struct nfs_server *server,
774 struct nfs4_sequence_args *args,
775 struct nfs4_sequence_res *res,
776 struct rpc_task *task)
ce5039c1 777{
035168ab 778 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 779 int ret = 0;
780
3bd2384a
CL		 781 if (!session)
782 return nfs40_setup_sequence(server, args, res, task);
035168ab 783
e8d92382 784 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 785 __func__, session->clp, session, res->sr_slot ?
e8d92382 786 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 787
9d12b216 788 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 789
ce5039c1
AA		 790 dprintk("<-- %s status=%d\n", __func__, ret);
791 return ret;
792}
793
ce5039c1
AA		 794static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
795{
2a3eb2b9 796 struct nfs4_call_sync_data *data = calldata;
6ba7db34 797 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 798
035168ab
TM		 799 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
800
d9afbd1b 801 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 802}
803
69ab40c4
AA		 804static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
805{
2a3eb2b9 806 struct nfs4_call_sync_data *data = calldata;
69ab40c4 807
14516c3a 808 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 809}
810
17280175 811static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 812 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 813 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 814};
815
3bd2384a
CL		 816#else /* !CONFIG_NFS_V4_1 */
817
9915ea7e
CL		 818static int nfs4_setup_sequence(const struct nfs_server *server,
819 struct nfs4_sequence_args *args,
820 struct nfs4_sequence_res *res,
821 struct rpc_task *task)
822{
3bd2384a 823 return nfs40_setup_sequence(server, args, res, task);
9915ea7e
CL		 824}
825
826static int nfs4_sequence_done(struct rpc_task *task,
827 struct nfs4_sequence_res *res)
828{
3bd2384a 829 return nfs40_sequence_done(task, res);
9915ea7e 830}
3bd2384a
CL		 831
832#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 833
834static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
835{
836 struct nfs4_call_sync_data *data = calldata;
837 nfs4_setup_sequence(data->seq_server,
838 data->seq_args, data->seq_res, task);
839}
840
841static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
842{
843 struct nfs4_call_sync_data *data = calldata;
844 nfs4_sequence_done(task, data->seq_res);
845}
846
847static const struct rpc_call_ops nfs40_call_sync_ops = {
848 .rpc_call_prepare = nfs40_call_sync_prepare,
849 .rpc_call_done = nfs40_call_sync_done,
850};
851
7c513058
BS		 852static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
853 struct nfs_server *server,
ce5039c1
AA		 854 struct rpc_message *msg,
855 struct nfs4_sequence_args *args,
8fe72bac 856 struct nfs4_sequence_res *res)
ce5039c1
AA		 857{
858 int ret;
859 struct rpc_task *task;
9915ea7e 860 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 861 struct nfs4_call_sync_data data = {
035168ab 862 .seq_server = server,
ce5039c1
AA		 863 .seq_args = args,
864 .seq_res = res,
ce5039c1
AA		 865 };
866 struct rpc_task_setup task_setup = {
7c513058 867 .rpc_client = clnt,
ce5039c1 868 .rpc_message = msg,
9915ea7e 869 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 870 .callback_data = &data
871 };
872
ce5039c1
AA		 873 task = rpc_run_task(&task_setup);
874 if (IS_ERR(task))
875 ret = PTR_ERR(task);
876 else {
877 ret = task->tk_status;
878 rpc_put_task(task);
879 }
880 return ret;
881}
882
7c513058
BS		 883int nfs4_call_sync(struct rpc_clnt *clnt,
884 struct nfs_server *server,
e73b83f2
BS		 885 struct rpc_message *msg,
886 struct nfs4_sequence_args *args,
887 struct nfs4_sequence_res *res,
888 int cache_reply)
889{
a9c92d6b 890 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 891 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 892}
cccef3b9 893
38478b24 894static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 895{
38478b24 896 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 897
38478b24 898 spin_lock(&dir->i_lock);
359d7d1c 899 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 900 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 901 nfs_force_lookup_revalidate(dir);
a9a4a87a 902 dir->i_version = cinfo->after;
de242c0b 903 nfs_fscache_invalidate(dir);
38478b24 904 spin_unlock(&dir->i_lock);
1da177e4
LT		 905}
906
e56e0b78 907struct nfs4_opendata {
c6d00e63 908 struct kref kref;
e56e0b78
TM		 909 struct nfs_openargs o_arg;
910 struct nfs_openres o_res;
cdd4e68b
TM		 911 struct nfs_open_confirmargs c_arg;
912 struct nfs_open_confirmres c_res;
6926afd1
TM		 913 struct nfs4_string owner_name;
914 struct nfs4_string group_name;
e56e0b78 915 struct nfs_fattr f_attr;
1775fd3e 916 struct nfs4_label *f_label;
e56e0b78 917 struct dentry *dir;
82a2c1b7 918 struct dentry *dentry;
e56e0b78 919 struct nfs4_state_owner *owner;
aac00a8d 920 struct nfs4_state *state;
e56e0b78 921 struct iattr attrs;
26e976a8 922 unsigned long timestamp;
3e309914 923 unsigned int rpc_done : 1;
5bc2afc2 924 unsigned int file_created : 1;
bdeca1b7 925 unsigned int is_recover : 1;
24ac23ab
TM		 926 int rpc_status;
927 int cancelled;
e56e0b78
TM		 928};
929
49f9a0fa
TM		 930static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
931 int err, struct nfs4_exception *exception)
932{
933 if (err != -EINVAL)
934 return false;
935 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
936 return false;
937 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
938 exception->retry = 1;
939 return true;
940}
941
942static enum open_claim_type4
943nfs4_map_atomic_open_claim(struct nfs_server *server,
944 enum open_claim_type4 claim)
945{
946 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
947 return claim;
948 switch (claim) {
949 default:
950 return claim;
951 case NFS4_OPEN_CLAIM_FH:
952 return NFS4_OPEN_CLAIM_NULL;
953 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
954 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
955 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
956 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
957 }
958}
2ced46c2
TM		 959
960static void nfs4_init_opendata_res(struct nfs4_opendata *p)
961{
962 p->o_res.f_attr = &p->f_attr;
1775fd3e 963 p->o_res.f_label = p->f_label;
c1d51931
TM		 964 p->o_res.seqid = p->o_arg.seqid;
965 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 966 p->o_res.server = p->o_arg.server;
5f657530 967 p->o_res.access_request = p->o_arg.access;
2ced46c2 968 nfs_fattr_init(&p->f_attr);
6926afd1 969 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 970}
971
82a2c1b7 972static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 973 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 974 const struct iattr *attrs,
1775fd3e 975 struct nfs4_label *label,
4a1c0893 976 enum open_claim_type4 claim,
8535b2be 977 gfp_t gfp_mask)
e56e0b78 978{
82a2c1b7 979 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 980 struct inode *dir = parent->d_inode;
981 struct nfs_server *server = NFS_SERVER(dir);
982 struct nfs4_opendata *p;
983
8535b2be 984 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 985 if (p == NULL)
986 goto err;
14c43f76
DQ		 987
988 p->f_label = nfs4_label_alloc(server, gfp_mask);
989 if (IS_ERR(p->f_label))
990 goto err_free_p;
991
8535b2be 992 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 993 if (p->o_arg.seqid == NULL)
14c43f76 994 goto err_free_label;
82a2c1b7
AV		 995 nfs_sb_active(dentry->d_sb);
996 p->dentry = dget(dentry);
e56e0b78
TM		 997 p->dir = parent;
998 p->owner = sp;
999 atomic_inc(&sp->so_count);
dc0b027d
TM		 1000 p->o_arg.open_flags = flags;
1001 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 1002 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1003 * will return permission denied for all bits until close */
1004 if (!(flags & O_EXCL)) {
1005 /* ask server to check for all possible rights as results
1006 * are cached */
1007 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1008 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1009 }
7539bbab 1010 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1011 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1012 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1013 p->o_arg.name = &dentry->d_name;
e56e0b78 1014 p->o_arg.server = server;
aa9c2669 1015 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1016 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1017 p->o_arg.label = label;
49f9a0fa
TM		 1018 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1019 switch (p->o_arg.claim) {
4a1c0893
TM		 1020 case NFS4_OPEN_CLAIM_NULL:
1021 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1022 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1023 p->o_arg.fh = NFS_FH(dir);
1024 break;
1025 case NFS4_OPEN_CLAIM_PREVIOUS:
1026 case NFS4_OPEN_CLAIM_FH:
1027 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1028 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1029 p->o_arg.fh = NFS_FH(dentry->d_inode);
1030 }
536e43d1 1031 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1032 __u32 verf[2];
d77d76ff 1033
e56e0b78
TM		 1034 p->o_arg.u.attrs = &p->attrs;
1035 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1036
1037 verf[0] = jiffies;
1038 verf[1] = current->pid;
1039 memcpy(p->o_arg.u.verifier.data, verf,
1040 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1041 }
cdd4e68b
TM		 1042 p->c_arg.fh = &p->o_res.fh;
1043 p->c_arg.stateid = &p->o_res.stateid;
1044 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1045 nfs4_init_opendata_res(p);
c6d00e63 1046 kref_init(&p->kref);
e56e0b78 1047 return p;
14c43f76
DQ		 1048
1049err_free_label:
1050 nfs4_label_free(p->f_label);
1051err_free_p:
e56e0b78
TM		 1052 kfree(p);
1053err:
1054 dput(parent);
1055 return NULL;
1056}
1057
c6d00e63 1058static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1059{
c6d00e63
TM		 1060 struct nfs4_opendata *p = container_of(kref,
1061 struct nfs4_opendata, kref);
82a2c1b7 1062 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1063
1064 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1065 if (p->state != NULL)
1066 nfs4_put_open_state(p->state);
c6d00e63 1067 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1068
1069 nfs4_label_free(p->f_label);
1070
c6d00e63 1071 dput(p->dir);
82a2c1b7
AV		 1072 dput(p->dentry);
1073 nfs_sb_deactive(sb);
6926afd1 1074 nfs_fattr_free_names(&p->f_attr);
e911b815 1075 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1076 kfree(p);
1077}
1078
1079static void nfs4_opendata_put(struct nfs4_opendata *p)
1080{
1081 if (p != NULL)
1082 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1083}
1084
06f814a3
TM		 1085static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1086{
06f814a3
TM		 1087 int ret;
1088
06f814a3 1089 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1090 return ret;
1091}
1092
dc0b027d 1093static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1094{
1095 int ret = 0;
dc0b027d 1096
536e43d1 1097 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1098 goto out;
1099 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1100 case FMODE_READ:
88069f77
TM		 1101 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1102 && state->n_rdonly != 0;
6ee41268
TM		 1103 break;
1104 case FMODE_WRITE:
88069f77
TM		 1105 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1106 && state->n_wronly != 0;
6ee41268
TM		 1107 break;
1108 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1109 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1110 && state->n_rdwr != 0;
6ee41268 1111 }
dc0b027d 1112out:
6ee41268
TM		 1113 return ret;
1114}
1115
dc0b027d 1116static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1117{
652f89f6
TM		 1118 if (delegation == NULL)
1119 return 0;
dc0b027d 1120 if ((delegation->type & fmode) != fmode)
aac00a8d 1121 return 0;
15c831bf 1122 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 1123 return 0;
d25be546
TM		 1124 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1125 return 0;
b7391f44 1126 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1127 return 1;
1128}
1129
dc0b027d 1130static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1131{
dc0b027d 1132 switch (fmode) {
e7616923
TM		 1133 case FMODE_WRITE:
1134 state->n_wronly++;
1135 break;
1136 case FMODE_READ:
1137 state->n_rdonly++;
1138 break;
1139 case FMODE_READ|FMODE_WRITE:
1140 state->n_rdwr++;
1141 }
dc0b027d 1142 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1143}
1144
4f14c194
TM		 1145static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1146{
1147 struct nfs_client *clp = state->owner->so_server->nfs_client;
1148 bool need_recover = false;
1149
1150 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1151 need_recover = true;
1152 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1153 need_recover = true;
1154 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1155 need_recover = true;
1156 if (need_recover)
1157 nfs4_state_mark_reclaim_nograce(clp, state);
1158}
1159
e999e80e
TM		 1160static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1161 nfs4_stateid *stateid)
1162{
1163 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1164 return true;
4f14c194
TM		 1165 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1166 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1167 return true;
4f14c194 1168 }
e999e80e
TM		 1169 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1170 return true;
1171 return false;
1172}
1173
226056c5
TM		 1174static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1175 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1176{
226056c5
TM		 1177 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1178 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1179 case FMODE_WRITE:
1180 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1181 break;
1182 case FMODE_READ:
1183 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1184 break;
1185 case 0:
1186 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1187 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1188 clear_bit(NFS_OPEN_STATE, &state->flags);
1189 }
1190 if (stateid == NULL)
1191 return;
1192 if (!nfs_need_update_open_stateid(state, stateid))
1193 return;
003707c7 1194 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1195 nfs4_stateid_copy(&state->stateid, stateid);
1196 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1197}
1198
1199static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1200{
1201 write_seqlock(&state->seqlock);
1202 nfs_clear_open_stateid_locked(state, stateid, fmode);
1203 write_sequnlock(&state->seqlock);
4f14c194
TM		 1204 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1205 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1206}
1207
dc0b027d 1208static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1209{
dc0b027d 1210 switch (fmode) {
003707c7
TM		 1211 case FMODE_READ:
1212 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1213 break;
1214 case FMODE_WRITE:
1215 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1216 break;
1217 case FMODE_READ|FMODE_WRITE:
1218 set_bit(NFS_O_RDWR_STATE, &state->flags);
1219 }
e999e80e
TM		 1220 if (!nfs_need_update_open_stateid(state, stateid))
1221 return;
1222 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1223 nfs4_stateid_copy(&state->stateid, stateid);
1224 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1225}
1226
dc0b027d 1227static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1228{
8bda4e4c
TM		 1229 /*
1230 * Protect the call to nfs4_state_set_mode_locked and
1231 * serialise the stateid update
1232 */
1233 write_seqlock(&state->seqlock);
003707c7 1234 if (deleg_stateid != NULL) {
f597c537 1235 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1236 set_bit(NFS_DELEGATED_STATE, &state->flags);
1237 }
1238 if (open_stateid != NULL)
dc0b027d 1239 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1240 write_sequnlock(&state->seqlock);
1241 spin_lock(&state->owner->so_lock);
dc0b027d 1242 update_open_stateflags(state, fmode);
ec073428 1243 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1244}
1245
dc0b027d 1246static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1247{
1248 struct nfs_inode *nfsi = NFS_I(state->inode);
1249 struct nfs_delegation *deleg_cur;
1250 int ret = 0;
1251
dc0b027d 1252 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1253
1254 rcu_read_lock();
1255 deleg_cur = rcu_dereference(nfsi->delegation);
1256 if (deleg_cur == NULL)
1257 goto no_delegation;
1258
1259 spin_lock(&deleg_cur->lock);
17f26b12 1260 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1261 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1262 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1263 goto no_delegation_unlock;
1264
1265 if (delegation == NULL)
1266 delegation = &deleg_cur->stateid;
f597c537 1267 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1268 goto no_delegation_unlock;
1269
b7391f44 1270 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1271 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1272 ret = 1;
1273no_delegation_unlock:
1274 spin_unlock(&deleg_cur->lock);
1275no_delegation:
1276 rcu_read_unlock();
1277
1278 if (!ret && open_stateid != NULL) {
dc0b027d 1279 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1280 ret = 1;
1281 }
4f14c194
TM		 1282 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1283 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1284
1285 return ret;
1286}
1287
1288
dc0b027d 1289static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1290{
1291 struct nfs_delegation *delegation;
1292
1293 rcu_read_lock();
1294 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1295 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1296 rcu_read_unlock();
1297 return;
1298 }
1299 rcu_read_unlock();
57ec14c5 1300 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1301}
1302
6ee41268 1303static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1304{
1305 struct nfs4_state *state = opendata->state;
1306 struct nfs_inode *nfsi = NFS_I(state->inode);
1307 struct nfs_delegation *delegation;
f448badd 1308 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1309 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1310 nfs4_stateid stateid;
1311 int ret = -EAGAIN;
1312
aac00a8d 1313 for (;;) {
61beef75 1314 spin_lock(&state->owner->so_lock);
dc0b027d 1315 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1316 update_open_stateflags(state, fmode);
6ee41268 1317 spin_unlock(&state->owner->so_lock);
61beef75 1318 goto out_return_state;
6ee41268 1319 }
61beef75 1320 spin_unlock(&state->owner->so_lock);
34310430
TM		 1321 rcu_read_lock();
1322 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1323 if (!can_open_delegated(delegation, fmode)) {
34310430 1324 rcu_read_unlock();
aac00a8d 1325 break;
34310430 1326 }
aac00a8d 1327 /* Save the delegation */
f597c537 1328 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1329 rcu_read_unlock();
fa332941 1330 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1331 if (!opendata->is_recover) {
1332 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1333 if (ret != 0)
1334 goto out;
1335 }
aac00a8d 1336 ret = -EAGAIN;
34310430
TM		 1337
1338 /* Try to update the stateid using the delegation */
dc0b027d 1339 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1340 goto out_return_state;
aac00a8d 1341 }
aac00a8d
TM		 1342out:
1343 return ERR_PTR(ret);
1344out_return_state:
1345 atomic_inc(&state->count);
1346 return state;
1347}
1348
e23008ec
AA		 1349static void
1350nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1351{
1352 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1353 struct nfs_delegation *delegation;
1354 int delegation_flags = 0;
1355
1356 rcu_read_lock();
1357 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1358 if (delegation)
1359 delegation_flags = delegation->flags;
1360 rcu_read_unlock();
1361 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1362 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1363 "returning a delegation for "
1364 "OPEN(CLAIM_DELEGATE_CUR)\n",
1365 clp->cl_hostname);
1366 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1367 nfs_inode_set_delegation(state->inode,
1368 data->owner->so_cred,
1369 &data->o_res);
1370 else
1371 nfs_inode_reclaim_delegation(state->inode,
1372 data->owner->so_cred,
1373 &data->o_res);
1374}
1375
1376/*
1377 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1378 * and update the nfs4_state.
1379 */
1380static struct nfs4_state *
1381_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1382{
1383 struct inode *inode = data->state->inode;
1384 struct nfs4_state *state = data->state;
1385 int ret;
1386
d2bfda2e
WAA		 1387 if (!data->rpc_done) {
1388 if (data->rpc_status) {
1389 ret = data->rpc_status;
1390 goto err;
1391 }
1392 /* cached opens have already been processed */
1393 goto update;
e23008ec
AA		 1394 }
1395
e23008ec
AA		 1396 ret = nfs_refresh_inode(inode, &data->f_attr);
1397 if (ret)
1398 goto err;
1399
1400 if (data->o_res.delegation_type != 0)
1401 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1402update:
e23008ec
AA		 1403 update_open_stateid(state, &data->o_res.stateid, NULL,
1404 data->o_arg.fmode);
d49f042a 1405 atomic_inc(&state->count);
e23008ec
AA		 1406
1407 return state;
1408err:
1409 return ERR_PTR(ret);
1410
1411}
1412
1413static struct nfs4_state *
1414_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1415{
1416 struct inode *inode;
1417 struct nfs4_state *state = NULL;
1b370bc2 1418 int ret;
24ac23ab 1419
aac00a8d 1420 if (!data->rpc_done) {
6ee41268 1421 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1422 goto out;
1423 }
1424
1b370bc2 1425 ret = -EAGAIN;
24ac23ab 1426 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1427 goto err;
1775fd3e 1428 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1429 ret = PTR_ERR(inode);
03f28e3a 1430 if (IS_ERR(inode))
1b370bc2
TM		 1431 goto err;
1432 ret = -ENOMEM;
24ac23ab
TM		 1433 state = nfs4_get_open_state(inode, data->owner);
1434 if (state == NULL)
1b370bc2 1435 goto err_put_inode;
e23008ec
AA		 1436 if (data->o_res.delegation_type != 0)
1437 nfs4_opendata_check_deleg(data, state);
34310430 1438 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1439 data->o_arg.fmode);
24ac23ab 1440 iput(inode);
aac00a8d 1441out:
7aa262b5 1442 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1443 return state;
1b370bc2
TM		 1444err_put_inode:
1445 iput(inode);
1446err:
1447 return ERR_PTR(ret);
24ac23ab
TM		 1448}
1449
e23008ec
AA		 1450static struct nfs4_state *
1451nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1452{
1453 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1454 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1455 return _nfs4_opendata_to_nfs4_state(data);
1456}
1457
864472e9
TM		 1458static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1459{
1460 struct nfs_inode *nfsi = NFS_I(state->inode);
1461 struct nfs_open_context *ctx;
1462
1463 spin_lock(&state->inode->i_lock);
1464 list_for_each_entry(ctx, &nfsi->open_files, list) {
1465 if (ctx->state != state)
1466 continue;
1467 get_nfs_open_context(ctx);
1468 spin_unlock(&state->inode->i_lock);
1469 return ctx;
1470 }
1471 spin_unlock(&state->inode->i_lock);
1472 return ERR_PTR(-ENOENT);
1473}
1474
4a1c0893
TM		 1475static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1476 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1477{
1478 struct nfs4_opendata *opendata;
1479
4a1c0893 1480 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1481 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1482 if (opendata == NULL)
1483 return ERR_PTR(-ENOMEM);
1484 opendata->state = state;
1485 atomic_inc(&state->count);
1486 return opendata;
1487}
1488
dc0b027d 1489static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1490{
2ced46c2 1491 struct nfs4_state *newstate;
864472e9
TM		 1492 int ret;
1493
dc0b027d
TM		 1494 opendata->o_arg.open_flags = 0;
1495 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1496 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1497 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1498 nfs4_init_opendata_res(opendata);
b257957e 1499 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1500 if (ret != 0)
1501 return ret;
2ced46c2 1502 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1503 if (IS_ERR(newstate))
1504 return PTR_ERR(newstate);
643168c2 1505 nfs4_close_state(newstate, fmode);
2ced46c2 1506 *res = newstate;
864472e9
TM		 1507 return 0;
1508}
1509
1510static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1511{
864472e9 1512 struct nfs4_state *newstate;
864472e9
TM		 1513 int ret;
1514
4f14c194
TM		 1515 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1516 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1517 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1518 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1519 /* memory barrier prior to reading state->n_* */
2ced46c2 1520 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1521 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1522 smp_rmb();
1523 if (state->n_rdwr != 0) {
2ced46c2 1524 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1525 if (ret != 0)
1526 return ret;
2ced46c2
TM		 1527 if (newstate != state)
1528 return -ESTALE;
864472e9
TM		 1529 }
1530 if (state->n_wronly != 0) {
2ced46c2 1531 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1532 if (ret != 0)
1533 return ret;
2ced46c2
TM		 1534 if (newstate != state)
1535 return -ESTALE;
864472e9
TM		 1536 }
1537 if (state->n_rdonly != 0) {
2ced46c2 1538 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1539 if (ret != 0)
1540 return ret;
2ced46c2
TM		 1541 if (newstate != state)
1542 return -ESTALE;
864472e9 1543 }
1ac7e2fd
TM		 1544 /*
1545 * We may have performed cached opens for all three recoveries.
1546 * Check if we need to update the current stateid.
1547 */
1548 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1549 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1550 write_seqlock(&state->seqlock);
1ac7e2fd 1551 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1552 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1553 write_sequnlock(&state->seqlock);
1ac7e2fd 1554 }
864472e9
TM		 1555 return 0;
1556}
1557
1da177e4
LT		 1558/*
1559 * OPEN_RECLAIM:
1560 * reclaim state on the server after a reboot.
1da177e4 1561 */
539cd03a 1562static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1563{
1ac7e2fd 1564 struct nfs_delegation *delegation;
864472e9 1565 struct nfs4_opendata *opendata;
dc0b027d 1566 fmode_t delegation_type = 0;
1da177e4
LT		 1567 int status;
1568
4a1c0893
TM		 1569 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1570 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1571 if (IS_ERR(opendata))
1572 return PTR_ERR(opendata);
1ac7e2fd
TM		 1573 rcu_read_lock();
1574 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1575 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1576 delegation_type = delegation->type;
1ac7e2fd 1577 rcu_read_unlock();
864472e9
TM		 1578 opendata->o_arg.u.delegation_type = delegation_type;
1579 status = nfs4_open_recover(opendata, state);
c6d00e63 1580 nfs4_opendata_put(opendata);
1da177e4
LT		 1581 return status;
1582}
1583
539cd03a 1584static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1585{
1586 struct nfs_server *server = NFS_SERVER(state->inode);
1587 struct nfs4_exception exception = { };
1588 int err;
1589 do {
539cd03a 1590 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1591 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1592 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1593 continue;
168667c4 1594 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1595 break;
1596 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1597 } while (exception.retry);
1598 return err;
1599}
1600
864472e9
TM		 1601static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1602{
1603 struct nfs_open_context *ctx;
1604 int ret;
1605
1606 ctx = nfs4_state_find_open_context(state);
1607 if (IS_ERR(ctx))
91876b13 1608 return -EAGAIN;
539cd03a 1609 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1610 put_nfs_open_context(ctx);
1611 return ret;
1612}
1613
db4f2e63 1614static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1615{
be76b5b6
TM		 1616 switch (err) {
1617 default:
1618 printk(KERN_ERR "NFS: %s: unhandled error "
1619 "%d.\n", __func__, err);
1620 case 0:
1621 case -ENOENT:
1622 case -ESTALE:
1623 break;
1624 case -NFS4ERR_BADSESSION:
1625 case -NFS4ERR_BADSLOT:
1626 case -NFS4ERR_BAD_HIGH_SLOT:
1627 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1628 case -NFS4ERR_DEADSESSION:
1629 set_bit(NFS_DELEGATED_STATE, &state->flags);
1630 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1631 return -EAGAIN;
1632 case -NFS4ERR_STALE_CLIENTID:
1633 case -NFS4ERR_STALE_STATEID:
1634 set_bit(NFS_DELEGATED_STATE, &state->flags);
1635 case -NFS4ERR_EXPIRED:
1636 /* Don't recall a delegation if it was lost */
1637 nfs4_schedule_lease_recovery(server->nfs_client);
1638 return -EAGAIN;
352297b9
CL		 1639 case -NFS4ERR_MOVED:
1640 nfs4_schedule_migration_recovery(server);
1641 return -EAGAIN;
8ef2f8d4
CL		 1642 case -NFS4ERR_LEASE_MOVED:
1643 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1644 return -EAGAIN;
be76b5b6
TM		 1645 case -NFS4ERR_DELEG_REVOKED:
1646 case -NFS4ERR_ADMIN_REVOKED:
1647 case -NFS4ERR_BAD_STATEID:
db4f2e63 1648 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1649 nfs_inode_find_state_and_recover(state->inode,
1650 stateid);
1651 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1652 return -EAGAIN;
be76b5b6
TM		 1653 case -NFS4ERR_DELAY:
1654 case -NFS4ERR_GRACE:
1655 set_bit(NFS_DELEGATED_STATE, &state->flags);
1656 ssleep(1);
1657 return -EAGAIN;
db4f2e63
TM		 1658 case -ENOMEM:
1659 case -NFS4ERR_DENIED:
1660 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1661 return 0;
be76b5b6 1662 }
1da177e4
LT		 1663 return err;
1664}
1665
db4f2e63
TM		 1666int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1667{
1668 struct nfs_server *server = NFS_SERVER(state->inode);
1669 struct nfs4_opendata *opendata;
1670 int err;
1671
1672 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1673 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1674 if (IS_ERR(opendata))
1675 return PTR_ERR(opendata);
1676 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1677 err = nfs4_open_recover(opendata, state);
1678 nfs4_opendata_put(opendata);
1679 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1680}
1681
be05c860
CL		 1682static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1683{
1684 struct nfs4_opendata *data = calldata;
1685
17ead6c8
TM		 1686 nfs40_setup_sequence(data->o_arg.server, &data->c_arg.seq_args,
1687 &data->c_res.seq_res, task);
be05c860
CL		 1688}
1689
cdd4e68b
TM		 1690static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1691{
1692 struct nfs4_opendata *data = calldata;
1693
17ead6c8 1694 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1695
cdd4e68b 1696 data->rpc_status = task->tk_status;
26e976a8 1697 if (data->rpc_status == 0) {
f597c537 1698 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1699 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1700 renew_lease(data->o_res.server, data->timestamp);
3e309914 1701 data->rpc_done = 1;
26e976a8 1702 }
cdd4e68b
TM		 1703}
1704
1705static void nfs4_open_confirm_release(void *calldata)
1706{
1707 struct nfs4_opendata *data = calldata;
1708 struct nfs4_state *state = NULL;
1709
1710 /* If this request hasn't been cancelled, do nothing */
1711 if (data->cancelled == 0)
1712 goto out_free;
1713 /* In case of error, no cleanup! */
3e309914 1714 if (!data->rpc_done)
cdd4e68b 1715 goto out_free;
cdd4e68b 1716 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1717 if (!IS_ERR(state))
643168c2 1718 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1719out_free:
c6d00e63 1720 nfs4_opendata_put(data);
cdd4e68b
TM		 1721}
1722
1723static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1724 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1725 .rpc_call_done = nfs4_open_confirm_done,
1726 .rpc_release = nfs4_open_confirm_release,
1727};
1728
1729/*
1730 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1731 */
1732static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1733{
1734 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1735 struct rpc_task *task;
5138fde0
TM		 1736 struct rpc_message msg = {
1737 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1738 .rpc_argp = &data->c_arg,
1739 .rpc_resp = &data->c_res,
1740 .rpc_cred = data->owner->so_cred,
1741 };
c970aa85
TM		 1742 struct rpc_task_setup task_setup_data = {
1743 .rpc_client = server->client,
5138fde0 1744 .rpc_message = &msg,
c970aa85
TM		 1745 .callback_ops = &nfs4_open_confirm_ops,
1746 .callback_data = data,
101070ca 1747 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1748 .flags = RPC_TASK_ASYNC,
1749 };
1da177e4
LT		 1750 int status;
1751
17ead6c8 1752 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1753 kref_get(&data->kref);
3e309914
TM		 1754 data->rpc_done = 0;
1755 data->rpc_status = 0;
5138fde0 1756 data->timestamp = jiffies;
c970aa85 1757 task = rpc_run_task(&task_setup_data);
7a1218a2 1758 if (IS_ERR(task))
cdd4e68b 1759 return PTR_ERR(task);
cdd4e68b
TM		 1760 status = nfs4_wait_for_completion_rpc_task(task);
1761 if (status != 0) {
1762 data->cancelled = 1;
1763 smp_wmb();
1764 } else
1765 status = data->rpc_status;
e6b3c4db 1766 rpc_put_task(task);
1da177e4
LT		 1767 return status;
1768}
1769
24ac23ab 1770static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1771{
24ac23ab
TM		 1772 struct nfs4_opendata *data = calldata;
1773 struct nfs4_state_owner *sp = data->owner;
549b19cc 1774 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1775
24ac23ab 1776 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1777 goto out_wait;
aac00a8d
TM		 1778 /*
1779 * Check if we still need to send an OPEN call, or if we can use
1780 * a delegation instead.
1781 */
1782 if (data->state != NULL) {
1783 struct nfs_delegation *delegation;
1784
dc0b027d 1785 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1786 goto out_no_action;
aac00a8d
TM		 1787 rcu_read_lock();
1788 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1789 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1790 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1791 can_open_delegated(delegation, data->o_arg.fmode))
1792 goto unlock_no_action;
aac00a8d
TM		 1793 rcu_read_unlock();
1794 }
95b72eb0 1795 /* Update client id. */
549b19cc 1796 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1797 switch (data->o_arg.claim) {
1798 case NFS4_OPEN_CLAIM_PREVIOUS:
1799 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1800 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1801 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1802 case NFS4_OPEN_CLAIM_FH:
1803 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1804 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1805 }
26e976a8 1806 data->timestamp = jiffies;
035168ab 1807 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1808 &data->o_arg.seq_args,
2240a9e2
TM		 1809 &data->o_res.seq_res,
1810 task) != 0)
1811 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1812
1813 /* Set the create mode (note dependency on the session type) */
1814 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1815 if (data->o_arg.open_flags & O_EXCL) {
1816 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1817 if (nfs4_has_persistent_session(clp))
1818 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1819 else if (clp->cl_mvops->minor_version > 0)
1820 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1821 }
6ee41268 1822 return;
652f89f6
TM		 1823unlock_no_action:
1824 rcu_read_unlock();
6ee41268
TM		 1825out_no_action:
1826 task->tk_action = NULL;
c8da19b9 1827out_wait:
b75ad4cd 1828 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1829}
1830
24ac23ab
TM		 1831static void nfs4_open_done(struct rpc_task *task, void *calldata)
1832{
1833 struct nfs4_opendata *data = calldata;
1da177e4 1834
24ac23ab 1835 data->rpc_status = task->tk_status;
d898528c 1836
14516c3a
TM		 1837 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1838 return;
d898528c 1839
24ac23ab 1840 if (task->tk_status == 0) {
807d66d8
TM		 1841 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1842 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1843 case S_IFREG:
1844 break;
1845 case S_IFLNK:
24ac23ab 1846 data->rpc_status = -ELOOP;
6f926b5b
TM		 1847 break;
1848 case S_IFDIR:
24ac23ab 1849 data->rpc_status = -EISDIR;
6f926b5b
TM		 1850 break;
1851 default:
24ac23ab 1852 data->rpc_status = -ENOTDIR;
807d66d8 1853 }
6f926b5b 1854 }
26e976a8 1855 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1856 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1857 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1858 }
3e309914 1859 data->rpc_done = 1;
24ac23ab 1860}
6f926b5b 1861
24ac23ab
TM		 1862static void nfs4_open_release(void *calldata)
1863{
1864 struct nfs4_opendata *data = calldata;
1865 struct nfs4_state *state = NULL;
1866
1867 /* If this request hasn't been cancelled, do nothing */
1868 if (data->cancelled == 0)
1869 goto out_free;
1870 /* In case of error, no cleanup! */
3e309914 1871 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1872 goto out_free;
1873 /* In case we need an open_confirm, no cleanup! */
1874 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1875 goto out_free;
24ac23ab 1876 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1877 if (!IS_ERR(state))
643168c2 1878 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1879out_free:
c6d00e63 1880 nfs4_opendata_put(data);
24ac23ab
TM		 1881}
1882
1883static const struct rpc_call_ops nfs4_open_ops = {
1884 .rpc_call_prepare = nfs4_open_prepare,
1885 .rpc_call_done = nfs4_open_done,
1886 .rpc_release = nfs4_open_release,
1887};
1888
b257957e 1889static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1890{
1891 struct inode *dir = data->dir->d_inode;
1892 struct nfs_server *server = NFS_SERVER(dir);
1893 struct nfs_openargs *o_arg = &data->o_arg;
1894 struct nfs_openres *o_res = &data->o_res;
1895 struct rpc_task *task;
5138fde0
TM		 1896 struct rpc_message msg = {
1897 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1898 .rpc_argp = o_arg,
1899 .rpc_resp = o_res,
1900 .rpc_cred = data->owner->so_cred,
1901 };
c970aa85
TM		 1902 struct rpc_task_setup task_setup_data = {
1903 .rpc_client = server->client,
5138fde0 1904 .rpc_message = &msg,
c970aa85
TM		 1905 .callback_ops = &nfs4_open_ops,
1906 .callback_data = data,
101070ca 1907 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1908 .flags = RPC_TASK_ASYNC,
1909 };
24ac23ab
TM		 1910 int status;
1911
a9c92d6b 1912 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1913 kref_get(&data->kref);
3e309914
TM		 1914 data->rpc_done = 0;
1915 data->rpc_status = 0;
2ced46c2 1916 data->cancelled = 0;
bdeca1b7
TM		 1917 data->is_recover = 0;
1918 if (isrecover) {
8fe72bac 1919 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1920 data->is_recover = 1;
1921 }
c970aa85 1922 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1923 if (IS_ERR(task))
1924 return PTR_ERR(task);
1925 status = nfs4_wait_for_completion_rpc_task(task);
1926 if (status != 0) {
1927 data->cancelled = 1;
1928 smp_wmb();
1929 } else
1930 status = data->rpc_status;
1931 rpc_put_task(task);
1932
1933 return status;
1934}
1935
1936static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1937{
1938 struct inode *dir = data->dir->d_inode;
1939 struct nfs_openres *o_res = &data->o_res;
1940 int status;
1941
1942 status = nfs4_run_open_task(data, 1);
1943 if (status != 0 || !data->rpc_done)
1944 return status;
1945
6926afd1
TM		 1946 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1947
b257957e
AB		 1948 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1949 status = _nfs4_proc_open_confirm(data);
1950 if (status != 0)
1951 return status;
1952 }
1953
1954 return status;
1955}
1956
f3792d63
TM		 1957/*
1958 * Additional permission checks in order to distinguish between an
1959 * open for read, and an open for execute. This works around the
1960 * fact that NFSv4 OPEN treats read and execute permissions as being
1961 * the same.
1962 * Note that in the non-execute case, we want to turn off permission
1963 * checking if we just created a new file (POSIX open() semantics).
1964 */
6168f62c
WAA		 1965static int nfs4_opendata_access(struct rpc_cred *cred,
1966 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1967 struct nfs4_state *state, fmode_t fmode,
1968 int openflags)
6168f62c
WAA		 1969{
1970 struct nfs_access_entry cache;
1971 u32 mask;
1972
1973 /* access call failed or for some reason the server doesn't
1974 * support any access modes -- defer access call until later */
1975 if (opendata->o_res.access_supported == 0)
1976 return 0;
1977
1978 mask = 0;
f3792d63
TM		 1979 /*
1980 * Use openflags to check for exec, because fmode won't
1981 * always have FMODE_EXEC set when file open for exec.
1982 */
f8d9a897
WAA		 1983 if (openflags & __FMODE_EXEC) {
1984 /* ONLY check for exec rights */
1985 mask = MAY_EXEC;
f3792d63 1986 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 1987 mask = MAY_READ;
6168f62c
WAA		 1988
1989 cache.cred = cred;
1990 cache.jiffies = jiffies;
1991 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1992 nfs_access_add_cache(state->inode, &cache);
1993
bbd3a8ee 1994 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1995 return 0;
1996
1997 /* even though OPEN succeeded, access is denied. Close the file */
1998 nfs4_close_state(state, fmode);
998f40b5 1999 return -EACCES;
6168f62c
WAA		 2000}
2001
b257957e
AB		 2002/*
2003 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2004 */
2005static int _nfs4_proc_open(struct nfs4_opendata *data)
2006{
2007 struct inode *dir = data->dir->d_inode;
2008 struct nfs_server *server = NFS_SERVER(dir);
2009 struct nfs_openargs *o_arg = &data->o_arg;
2010 struct nfs_openres *o_res = &data->o_res;
2011 int status;
2012
2013 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2014 if (!data->rpc_done)
2015 return status;
2016 if (status != 0) {
2017 if (status == -NFS4ERR_BADNAME &&
2018 !(o_arg->open_flags & O_CREAT))
2019 return -ENOENT;
24ac23ab 2020 return status;
08ef7bd3 2021 }
24ac23ab 2022
6926afd1
TM		 2023 nfs_fattr_map_and_free_names(server, &data->f_attr);
2024
5bc2afc2 2025 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2026 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2027 if (o_arg->open_flags & O_EXCL)
2028 data->file_created = 1;
2029 else if (o_res->cinfo.before != o_res->cinfo.after)
2030 data->file_created = 1;
2031 }
0df5dd4a
TM		 2032 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2033 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2034 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2035 status = _nfs4_proc_open_confirm(data);
1da177e4 2036 if (status != 0)
24ac23ab 2037 return status;
1da177e4
LT		 2038 }
2039 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2040 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2041 return 0;
1da177e4
LT		 2042}
2043
d83217c1
AA		 2044static int nfs4_recover_expired_lease(struct nfs_server *server)
2045{
2046 return nfs4_client_recover_expired_lease(server->nfs_client);
2047}
2048
1da177e4
LT		 2049/*
2050 * OPEN_EXPIRED:
2051 * reclaim state on the server after a network partition.
2052 * Assumes caller holds the appropriate lock
2053 */
539cd03a 2054static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2055{
e56e0b78 2056 struct nfs4_opendata *opendata;
864472e9 2057 int ret;
1da177e4 2058
4a1c0893 2059 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2060 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2061 if (IS_ERR(opendata))
2062 return PTR_ERR(opendata);
864472e9 2063 ret = nfs4_open_recover(opendata, state);
35d05778 2064 if (ret == -ESTALE)
3d4ff43d 2065 d_drop(ctx->dentry);
c6d00e63 2066 nfs4_opendata_put(opendata);
864472e9 2067 return ret;
1da177e4
LT		 2068}
2069
a9ed2e25 2070static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2071{
539cd03a 2072 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2073 struct nfs4_exception exception = { };
2074 int err;
2075
2076 do {
539cd03a 2077 err = _nfs4_open_expired(ctx, state);
42113a75 2078 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2079 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2080 continue;
a9ed2e25
TM		 2081 switch (err) {
2082 default:
2083 goto out;
2084 case -NFS4ERR_GRACE:
2085 case -NFS4ERR_DELAY:
2086 nfs4_handle_exception(server, err, &exception);
2087 err = 0;
2088 }
202b50dc 2089 } while (exception.retry);
a9ed2e25 2090out:
202b50dc
TM		 2091 return err;
2092}
2093
1da177e4
LT		 2094static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2095{
1da177e4 2096 struct nfs_open_context *ctx;
864472e9 2097 int ret;
1da177e4 2098
864472e9
TM		 2099 ctx = nfs4_state_find_open_context(state);
2100 if (IS_ERR(ctx))
91876b13 2101 return -EAGAIN;
539cd03a 2102 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2103 put_nfs_open_context(ctx);
2104 return ret;
1da177e4
LT		 2105}
2106
4dfd4f7a
TM		 2107static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2108{
2109 nfs_remove_bad_delegation(state->inode);
2110 write_seqlock(&state->seqlock);
2111 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2112 write_sequnlock(&state->seqlock);
2113 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2114}
2115
2116static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2117{
2118 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2119 nfs_finish_clear_delegation_stateid(state);
2120}
2121
2122static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2123{
2124 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2125 nfs40_clear_delegation_stateid(state);
2126 return nfs4_open_expired(sp, state);
2127}
2128
f062eb6c 2129#if defined(CONFIG_NFS_V4_1)
0c116cad 2130static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2131{
f062eb6c 2132 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2133 nfs4_stateid stateid;
ab7cb0df 2134 struct nfs_delegation *delegation;
0c116cad
TM		 2135 struct rpc_cred *cred;
2136 int status;
3e60ffdd 2137
ab7cb0df
TM		 2138 /* Get the delegation credential for use by test/free_stateid */
2139 rcu_read_lock();
2140 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2141 if (delegation == NULL) {
ab7cb0df 2142 rcu_read_unlock();
0c116cad
TM		 2143 return;
2144 }
2145
2146 nfs4_stateid_copy(&stateid, &delegation->stateid);
2147 cred = get_rpccred(delegation->cred);
2148 rcu_read_unlock();
2149 status = nfs41_test_stateid(server, &stateid, cred);
2150 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2151
3e60ffdd
CL		 2152 if (status != NFS_OK) {
2153 /* Free the stateid unless the server explicitly
2154 * informs us the stateid is unrecognized. */
2155 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2156 nfs41_free_stateid(server, &stateid, cred);
2157 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2158 }
ab7cb0df 2159
0c116cad 2160 put_rpccred(cred);
3e60ffdd
CL		 2161}
2162
2163/**
2164 * nfs41_check_open_stateid - possibly free an open stateid
2165 *
2166 * @state: NFSv4 state for an inode
2167 *
2168 * Returns NFS_OK if recovery for this stateid is now finished.
2169 * Otherwise a negative NFS4ERR value is returned.
2170 */
2171static int nfs41_check_open_stateid(struct nfs4_state *state)
2172{
2173 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2174 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2175 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2176 int status;
2177
2178 /* If a state reset has been done, test_stateid is unneeded */
2179 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2180 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2181 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2182 return -NFS4ERR_BAD_STATEID;
2183
ab7cb0df 2184 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2185 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2186 if (status != NFS_OK) {
2187 /* Free the stateid unless the server explicitly
2188 * informs us the stateid is unrecognized. */
2189 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2190 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2191
2192 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2193 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2194 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2195 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2196 }
2197 return status;
2198}
2199
2200static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2201{
eb64cf96 2202 int status;
b01dd1d8 2203
0c116cad 2204 nfs41_check_delegation_stateid(state);
3e60ffdd 2205 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2206 if (status != NFS_OK)
2207 status = nfs4_open_expired(sp, state);
2208 return status;
f062eb6c
BS		 2209}
2210#endif
2211
aa53ed54
JL		 2212/*
2213 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2214 * fields corresponding to attributes that were used to store the verifier.
2215 * Make sure we clobber those fields in the later setattr call
2216 */
2217static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2218{
2219 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2220 !(sattr->ia_valid & ATTR_ATIME_SET))
2221 sattr->ia_valid |= ATTR_ATIME;
2222
2223 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2224 !(sattr->ia_valid & ATTR_MTIME_SET))
2225 sattr->ia_valid |= ATTR_MTIME;
2226}
2227
c21443c2
TM		 2228static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2229 fmode_t fmode,
2230 int flags,
3efb9722 2231 struct nfs_open_context *ctx)
c21443c2
TM		 2232{
2233 struct nfs4_state_owner *sp = opendata->owner;
2234 struct nfs_server *server = sp->so_server;
275bb307 2235 struct dentry *dentry;
c21443c2
TM		 2236 struct nfs4_state *state;
2237 unsigned int seq;
2238 int ret;
2239
2240 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2241
2242 ret = _nfs4_proc_open(opendata);
dca78001 2243 if (ret != 0)
c21443c2
TM		 2244 goto out;
2245
2246 state = nfs4_opendata_to_nfs4_state(opendata);
2247 ret = PTR_ERR(state);
2248 if (IS_ERR(state))
2249 goto out;
2250 if (server->caps & NFS_CAP_POSIX_LOCK)
2251 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2252
275bb307
TM		 2253 dentry = opendata->dentry;
2254 if (dentry->d_inode == NULL) {
2255 /* FIXME: Is this d_drop() ever needed? */
2256 d_drop(dentry);
2257 dentry = d_add_unique(dentry, igrab(state->inode));
2258 if (dentry == NULL) {
2259 dentry = opendata->dentry;
2260 } else if (dentry != ctx->dentry) {
2261 dput(ctx->dentry);
2262 ctx->dentry = dget(dentry);
2263 }
2264 nfs_set_verifier(dentry,
2265 nfs_save_change_attribute(opendata->dir->d_inode));
2266 }
2267
c21443c2
TM		 2268 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2269 if (ret != 0)
2270 goto out;
2271
3efb9722 2272 ctx->state = state;
c45ffdd2
TM		 2273 if (dentry->d_inode == state->inode) {
2274 nfs_inode_attach_open_context(ctx);
2275 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2276 nfs4_schedule_stateid_recovery(server, state);
2277 }
c21443c2
TM		 2278out:
2279 return ret;
2280}
2281
1da177e4 2282/*
24ac23ab 2283 * Returns a referenced nfs4_state
1da177e4 2284 */
82be417a 2285static int _nfs4_do_open(struct inode *dir,
4197a055 2286 struct nfs_open_context *ctx,
82be417a
AA		 2287 int flags,
2288 struct iattr *sattr,
5bc2afc2
TM		 2289 struct nfs4_label *label,
2290 int *opened)
1da177e4
LT		 2291{
2292 struct nfs4_state_owner *sp;
2293 struct nfs4_state *state = NULL;
2294 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2295 struct nfs4_opendata *opendata;
4197a055
TM		 2296 struct dentry *dentry = ctx->dentry;
2297 struct rpc_cred *cred = ctx->cred;
2298 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2299 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2300 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2301 struct nfs4_label *olabel = NULL;
aac00a8d 2302 int status;
1da177e4
LT		 2303
2304 /* Protect against reboot recovery conflicts */
1da177e4 2305 status = -ENOMEM;
d1e284d5
TM		 2306 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2307 if (sp == NULL) {
1da177e4
LT		 2308 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2309 goto out_err;
2310 }
58d9714a
TM		 2311 status = nfs4_recover_expired_lease(server);
2312 if (status != 0)
b4454fe1 2313 goto err_put_state_owner;
82a2c1b7
AV		 2314 if (dentry->d_inode != NULL)
2315 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2316 status = -ENOMEM;
49f9a0fa
TM		 2317 if (dentry->d_inode)
2318 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2319 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2320 label, claim, GFP_KERNEL);
e56e0b78 2321 if (opendata == NULL)
95d35cb4 2322 goto err_put_state_owner;
1da177e4 2323
14c43f76
DQ		 2324 if (label) {
2325 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2326 if (IS_ERR(olabel)) {
2327 status = PTR_ERR(olabel);
2328 goto err_opendata_put;
2329 }
2330 }
2331
e911b815
TM		 2332 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2333 if (!opendata->f_attr.mdsthreshold) {
2334 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2335 if (!opendata->f_attr.mdsthreshold)
2336 goto err_free_label;
2337 }
1549210f 2338 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2339 }
82a2c1b7
AV		 2340 if (dentry->d_inode != NULL)
2341 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2342
3efb9722 2343 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2344 if (status != 0)
14c43f76 2345 goto err_free_label;
3efb9722 2346 state = ctx->state;
6168f62c 2347
549b19cc
TM		 2348 if ((opendata->o_arg.open_flags & O_EXCL) &&
2349 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2350 nfs4_exclusive_attrset(opendata, sattr);
2351
2352 nfs_fattr_init(opendata->o_res.f_attr);
2353 status = nfs4_do_setattr(state->inode, cred,
2354 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2355 state, label, olabel);
2356 if (status == 0) {
0ab64e0e 2357 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2358 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2359 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2360 }
0ab64e0e 2361 }
5bc2afc2
TM		 2362 if (opendata->file_created)
2363 *opened |= FILE_CREATED;
82be417a 2364
e911b815 2365 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2366 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2367 opendata->f_attr.mdsthreshold = NULL;
2368 }
82be417a 2369
14c43f76
DQ		 2370 nfs4_label_free(olabel);
2371
c6d00e63 2372 nfs4_opendata_put(opendata);
1da177e4 2373 nfs4_put_state_owner(sp);
1da177e4 2374 return 0;
14c43f76
DQ		 2375err_free_label:
2376 nfs4_label_free(olabel);
c6d00e63
TM		 2377err_opendata_put:
2378 nfs4_opendata_put(opendata);
e56e0b78
TM		 2379err_put_state_owner:
2380 nfs4_put_state_owner(sp);
1da177e4 2381out_err:
1da177e4
LT		 2382 return status;
2383}
2384
2385
82be417a 2386static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2387 struct nfs_open_context *ctx,
82be417a
AA		 2388 int flags,
2389 struct iattr *sattr,
5bc2afc2
TM		 2390 struct nfs4_label *label,
2391 int *opened)
1da177e4 2392{
49f9a0fa 2393 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2394 struct nfs4_exception exception = { };
2395 struct nfs4_state *res;
2396 int status;
2397
2398 do {
5bc2afc2 2399 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2400 res = ctx->state;
42113a75 2401 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2402 if (status == 0)
2403 break;
2404 /* NOTE: BAD_SEQID means the server and client disagree about the
2405 * book-keeping w.r.t. state-changing operations
2406 * (OPEN/CLOSE/LOCK/LOCKU...)
2407 * It is actually a sign of a bug on the client or on the server.
2408 *
2409 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2410 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2411 * have unhashed the old state_owner for us, and that we can
2412 * therefore safely retry using a new one. We should still warn
2413 * the user though...
2414 */
2415 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2416 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2417 " returned a bad sequence-id error!\n",
2418 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2419 exception.retry = 1;
2420 continue;
2421 }
550f5747
TM		 2422 /*
2423 * BAD_STATEID on OPEN means that the server cancelled our
2424 * state before it received the OPEN_CONFIRM.
2425 * Recover by retrying the request as per the discussion
2426 * on Page 181 of RFC3530.
2427 */
2428 if (status == -NFS4ERR_BAD_STATEID) {
2429 exception.retry = 1;
2430 continue;
2431 }
aac00a8d
TM		 2432 if (status == -EAGAIN) {
2433 /* We must have found a delegation */
2434 exception.retry = 1;
2435 continue;
2436 }
49f9a0fa
TM		 2437 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2438 continue;
2439 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2440 status, &exception));
2441 } while (exception.retry);
2442 return res;
2443}
2444
659bfcd6
TM		 2445static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2446 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2447 struct nfs4_state *state, struct nfs4_label *ilabel,
2448 struct nfs4_label *olabel)
1da177e4 2449{
3e4f6290 2450 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2451 struct nfs_setattrargs arg = {
3e4f6290 2452 .fh = NFS_FH(inode),
1da177e4
LT		 2453 .iap = sattr,
2454 .server = server,
2455 .bitmask = server->attr_bitmask,
1775fd3e 2456 .label = ilabel,
1da177e4
LT		 2457 };
2458 struct nfs_setattrres res = {
2459 .fattr = fattr,
1775fd3e 2460 .label = olabel,
1da177e4
LT		 2461 .server = server,
2462 };
2463 struct rpc_message msg = {
659bfcd6
TM		 2464 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2465 .rpc_argp = &arg,
2466 .rpc_resp = &res,
2467 .rpc_cred = cred,
1da177e4 2468 };
26e976a8 2469 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2470 fmode_t fmode;
2471 bool truncate;
65e4308d 2472 int status;
1da177e4 2473
aa9c2669
DQ		 2474 arg.bitmask = nfs4_bitmask(server, ilabel);
2475 if (ilabel)
2476 arg.bitmask = nfs4_bitmask(server, olabel);
2477
0e574af1 2478 nfs_fattr_init(fattr);
1da177e4 2479
ee3ae84e
TM		 2480 /* Servers should only apply open mode checks for file size changes */
2481 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2482 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2483
2484 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2485 /* Use that stateid */
0418dae1 2486 } else if (truncate && state != NULL) {
2a369153
TM		 2487 struct nfs_lockowner lockowner = {
2488 .l_owner = current->files,
2489 .l_pid = current->tgid,
2490 };
0418dae1
TM		 2491 if (!nfs4_valid_open_stateid(state))
2492 return -EBADF;
2493 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2494 &lockowner) == -EIO)
2495 return -EBADF;
08e9eac4 2496 } else
f597c537 2497 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2498
7c513058 2499 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2500 if (status == 0 && state != NULL)
2501 renew_lease(server, timestamp);
65e4308d 2502 return status;
1da177e4
LT		 2503}
2504
659bfcd6
TM		 2505static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2506 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2507 struct nfs4_state *state, struct nfs4_label *ilabel,
2508 struct nfs4_label *olabel)
1da177e4 2509{
3e4f6290 2510 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2511 struct nfs4_exception exception = {
2512 .state = state,
3114ea7a 2513 .inode = inode,
a1d0b5ee 2514 };
1da177e4
LT		 2515 int err;
2516 do {
1775fd3e 2517 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2518 trace_nfs4_setattr(inode, err);
451146be
TM		 2519 switch (err) {
2520 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2521 if (!(sattr->ia_valid & ATTR_SIZE)) {
2522 pr_warn_once("NFSv4: server %s is incorrectly "
2523 "applying open mode checks to "
2524 "a SETATTR that is not "
2525 "changing file size.\n",
2526 server->nfs_client->cl_hostname);
2527 }
451146be
TM		 2528 if (state && !(state->state & FMODE_WRITE)) {
2529 err = -EBADF;
2530 if (sattr->ia_valid & ATTR_OPEN)
2531 err = -EACCES;
2532 goto out;
2533 }
2534 }
2535 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2536 } while (exception.retry);
451146be 2537out:
1da177e4
LT		 2538 return err;
2539}
2540
2541struct nfs4_closedata {
2542 struct inode *inode;
2543 struct nfs4_state *state;
2544 struct nfs_closeargs arg;
2545 struct nfs_closeres res;
516a6af6 2546 struct nfs_fattr fattr;
26e976a8 2547 unsigned long timestamp;
f7e8917a
FI		 2548 bool roc;
2549 u32 roc_barrier;
1da177e4
LT		 2550};
2551
963d8fe5 2552static void nfs4_free_closedata(void *data)
9512135d 2553{
963d8fe5
TM		 2554 struct nfs4_closedata *calldata = data;
2555 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2556 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2557
f7e8917a
FI		 2558 if (calldata->roc)
2559 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2560 nfs4_put_open_state(calldata->state);
2561 nfs_free_seqid(calldata->arg.seqid);
9512135d 2562 nfs4_put_state_owner(sp);
322b2b90 2563 nfs_sb_deactive(sb);
9512135d
TM		 2564 kfree(calldata);
2565}
2566
963d8fe5 2567static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2568{
963d8fe5 2569 struct nfs4_closedata *calldata = data;
1da177e4 2570 struct nfs4_state *state = calldata->state;
1da177e4 2571 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2572 nfs4_stateid *res_stateid = NULL;
1da177e4 2573
a3ca5651 2574 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2575 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2576 return;
42113a75 2577 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2578 /* hmm. we are done with the inode, and in the process of freeing
2579 * the state_owner. we keep this around to process errors
2580 */
1da177e4
LT		 2581 switch (task->tk_status) {
2582 case 0:
412f6c4c
TM		 2583 res_stateid = &calldata->res.stateid;
2584 if (calldata->arg.fmode == 0 && calldata->roc)
f7e8917a
FI		 2585 pnfs_roc_set_barrier(state->inode,
2586 calldata->roc_barrier);
26e976a8 2587 renew_lease(server, calldata->timestamp);
412f6c4c 2588 break;
69794ad7 2589 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2590 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2591 case -NFS4ERR_OLD_STATEID:
2592 case -NFS4ERR_BAD_STATEID:
1da177e4 2593 case -NFS4ERR_EXPIRED:
dc0b027d 2594 if (calldata->arg.fmode == 0)
9e33bed5 2595 break;
1da177e4 2596 default:
8478eaa1 2597 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2598 rpc_restart_call_prepare(task);
69794ad7
TM		 2599 goto out_release;
2600 }
1da177e4 2601 }
412f6c4c 2602 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
69794ad7 2603out_release:
72211dbe 2604 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2605 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2606 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2607}
2608
4ce70ada 2609static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2610{
4ce70ada 2611 struct nfs4_closedata *calldata = data;
9512135d 2612 struct nfs4_state *state = calldata->state;
7fdab069 2613 struct inode *inode = calldata->inode;
aee7af35 2614 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2615 int call_close = 0;
9512135d 2616
a3ca5651 2617 dprintk("%s: begin!\n", __func__);
963d8fe5 2618 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2619 goto out_wait;
003707c7 2620
88069f77 2621 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2622 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2623 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2624 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2625 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
003707c7 2626 /* Calculate the change in open mode */
cd9288ff 2627 calldata->arg.fmode = 0;
e7616923 2628 if (state->n_rdwr == 0) {
cd9288ff
TM		 2629 if (state->n_rdonly == 0)
2630 call_close |= is_rdonly;
2631 else if (is_rdonly)
2632 calldata->arg.fmode |= FMODE_READ;
2633 if (state->n_wronly == 0)
2634 call_close |= is_wronly;
2635 else if (is_wronly)
2636 calldata->arg.fmode |= FMODE_WRITE;
2637 } else if (is_rdwr)
2638 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2639
2640 if (calldata->arg.fmode == 0)
2641 call_close |= is_rdwr;
2642
5d422301
TM		 2643 if (!nfs4_valid_open_stateid(state))
2644 call_close = 0;
4cecb76f 2645 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2646
2647 if (!call_close) {
963d8fe5 2648 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2649 goto out_no_action;
9512135d 2650 }
88069f77 2651
f7e8917a 2652 if (calldata->arg.fmode == 0) {
88069f77 2653 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2654 if (calldata->roc &&
b9536ad5
AA		 2655 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2656 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2657 goto out_wait;
b9536ad5 2658 }
f7e8917a 2659 }
88069f77 2660
516a6af6 2661 nfs_fattr_init(calldata->res.fattr);
26e976a8 2662 calldata->timestamp = jiffies;
7fdab069 2663 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2664 &calldata->arg.seq_args,
2665 &calldata->res.seq_res,
2240a9e2
TM		 2666 task) != 0)
2667 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2668 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2669 return;
2670out_no_action:
2671 task->tk_action = NULL;
2672out_wait:
2673 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2674}
2675
963d8fe5 2676static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2677 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2678 .rpc_call_done = nfs4_close_done,
2679 .rpc_release = nfs4_free_closedata,
2680};
2681
fe08c546
PT		 2682static bool nfs4_state_has_opener(struct nfs4_state *state)
2683{
2684 /* first check existing openers */
2685 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 &&
2686 state->n_rdonly != 0)
2687 return true;
2688
2689 if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 &&
2690 state->n_wronly != 0)
2691 return true;
2692
2693 if (test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 &&
2694 state->n_rdwr != 0)
2695 return true;
2696
2697 return false;
2698}
2699
2700static bool nfs4_roc(struct inode *inode)
2701{
2702 struct nfs_inode *nfsi = NFS_I(inode);
2703 struct nfs_open_context *ctx;
2704 struct nfs4_state *state;
2705
2706 spin_lock(&inode->i_lock);
2707 list_for_each_entry(ctx, &nfsi->open_files, list) {
2708 state = ctx->state;
2709 if (state == NULL)
2710 continue;
2711 if (nfs4_state_has_opener(state)) {
2712 spin_unlock(&inode->i_lock);
2713 return false;
2714 }
2715 }
2716 spin_unlock(&inode->i_lock);
2717
2718 if (nfs4_check_delegation(inode, FMODE_READ))
2719 return false;
2720
2721 return pnfs_roc(inode);
2722}
2723
1da177e4
LT		 2724/*
2725 * It is possible for data to be read/written from a mem-mapped file
2726 * after the sys_close call (which hits the vfs layer as a flush).
2727 * This means that we can't safely call nfsv4 close on a file until
2728 * the inode is cleared. This in turn means that we are not good
2729 * NFSv4 citizens - we do not indicate to the server to update the file's
2730 * share state even when we are done with one of the three share
2731 * stateid's in the inode.
2732 *
2733 * NOTE: Caller must be holding the sp->so_owner semaphore!
2734 */
1f7977c1 2735int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2736{
4a35bd41 2737 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2738 struct nfs4_closedata *calldata;
b39e625b
TM		 2739 struct nfs4_state_owner *sp = state->owner;
2740 struct rpc_task *task;
5138fde0
TM		 2741 struct rpc_message msg = {
2742 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2743 .rpc_cred = state->owner->so_cred,
2744 };
c970aa85
TM		 2745 struct rpc_task_setup task_setup_data = {
2746 .rpc_client = server->client,
5138fde0 2747 .rpc_message = &msg,
c970aa85 2748 .callback_ops = &nfs4_close_ops,
101070ca 2749 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2750 .flags = RPC_TASK_ASYNC,
2751 };
9512135d 2752 int status = -ENOMEM;
1da177e4 2753
fa940720
WAA		 2754 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2755 &task_setup_data.rpc_client, &msg);
2756
8535b2be 2757 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2758 if (calldata == NULL)
9512135d 2759 goto out;
a9c92d6b 2760 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2761 calldata->inode = state->inode;
1da177e4 2762 calldata->state = state;
4a35bd41 2763 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2764 calldata->arg.stateid = &state->open_stateid;
1da177e4 2765 /* Serialization for the sequence id */
8535b2be 2766 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2767 if (calldata->arg.seqid == NULL)
2768 goto out_free_calldata;
dc0b027d 2769 calldata->arg.fmode = 0;
a65318bf 2770 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2771 calldata->res.fattr = &calldata->fattr;
c1d51931 2772 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2773 calldata->res.server = server;
fe08c546 2774 calldata->roc = nfs4_roc(state->inode);
643168c2 2775 nfs_sb_active(calldata->inode->i_sb);
9512135d 2776
1174dd1f
TM		 2777 msg.rpc_argp = &calldata->arg;
2778 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2779 task_setup_data.callback_data = calldata;
2780 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2781 if (IS_ERR(task))
2782 return PTR_ERR(task);
a49c3c77
TM		 2783 status = 0;
2784 if (wait)
2785 status = rpc_wait_for_completion_task(task);
b39e625b 2786 rpc_put_task(task);
a49c3c77 2787 return status;
9512135d
TM		 2788out_free_calldata:
2789 kfree(calldata);
2790out:
b39e625b
TM		 2791 nfs4_put_open_state(state);
2792 nfs4_put_state_owner(sp);
9512135d 2793 return status;
1da177e4
LT		 2794}
2795
2b484297 2796static struct inode *
5bc2afc2
TM		 2797nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2798 int open_flags, struct iattr *attr, int *opened)
1da177e4 2799{
1da177e4 2800 struct nfs4_state *state;
aa9c2669
DQ		 2801 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2802
2803 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2804
565277f6 2805 /* Protect against concurrent sillydeletes */
5bc2afc2 2806 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2807
2808 nfs4_label_release_security(label);
2809
f46e0bd3
TM		 2810 if (IS_ERR(state))
2811 return ERR_CAST(state);
275bb307 2812 return state->inode;
1da177e4
LT		 2813}
2814
1185a552 2815static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2816{
2817 if (ctx->state == NULL)
2818 return;
2819 if (is_sync)
643168c2 2820 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2821 else
643168c2 2822 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2823}
1da177e4 2824
b944dba3
TM		 2825#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2826#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2827#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2828
1da177e4
LT		 2829static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2830{
43652ad5
BH		 2831 struct nfs4_server_caps_arg args = {
2832 .fhandle = fhandle,
2833 };
1da177e4
LT		 2834 struct nfs4_server_caps_res res = {};
2835 struct rpc_message msg = {
2836 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2837 .rpc_argp = &args,
1da177e4
LT		 2838 .rpc_resp = &res,
2839 };
2840 int status;
2841
7c513058 2842 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2843 if (status == 0) {
b944dba3
TM		 2844 /* Sanity check the server answers */
2845 switch (server->nfs_client->cl_minorversion) {
2846 case 0:
2847 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2848 res.attr_bitmask[2] = 0;
2849 break;
2850 case 1:
2851 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2852 break;
2853 case 2:
2854 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2855 }
1da177e4 2856 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2857 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2858 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2859 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2860 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2861 NFS_CAP_CTIME|NFS_CAP_MTIME|
2862 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2863 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2864 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2865 server->caps |= NFS_CAP_ACLS;
2866 if (res.has_links != 0)
2867 server->caps |= NFS_CAP_HARDLINKS;
2868 if (res.has_symlinks != 0)
2869 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2870 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2871 server->caps |= NFS_CAP_FILEID;
2872 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2873 server->caps |= NFS_CAP_MODE;
2874 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2875 server->caps |= NFS_CAP_NLINK;
2876 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2877 server->caps |= NFS_CAP_OWNER;
2878 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2879 server->caps |= NFS_CAP_OWNER_GROUP;
2880 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2881 server->caps |= NFS_CAP_ATIME;
2882 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2883 server->caps |= NFS_CAP_CTIME;
2884 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2885 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2886#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2887 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2888 server->caps |= NFS_CAP_SECURITY_LABEL;
2889#endif
2890 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2891 sizeof(server->attr_bitmask));
b944dba3 2892 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2893
a65318bf
TM		 2894 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2895 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2896 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2897 server->cache_consistency_bitmask[2] = 0;
1da177e4 2898 server->acl_bitmask = res.acl_bitmask;
264e6351 2899 server->fh_expire_type = res.fh_expire_type;
1da177e4 2900 }
cccef3b9 2901
1da177e4
LT		 2902 return status;
2903}
2904
55a97593 2905int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2906{
2907 struct nfs4_exception exception = { };
2908 int err;
2909 do {
2910 err = nfs4_handle_exception(server,
2911 _nfs4_server_capabilities(server, fhandle),
2912 &exception);
2913 } while (exception.retry);
2914 return err;
2915}
2916
2917static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2918 struct nfs_fsinfo *info)
2919{
aa9c2669 2920 u32 bitmask[3];
1da177e4 2921 struct nfs4_lookup_root_arg args = {
aa9c2669 2922 .bitmask = bitmask,
1da177e4
LT		 2923 };
2924 struct nfs4_lookup_res res = {
2925 .server = server,
0e574af1 2926 .fattr = info->fattr,
1da177e4
LT		 2927 .fh = fhandle,
2928 };
2929 struct rpc_message msg = {
2930 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2931 .rpc_argp = &args,
2932 .rpc_resp = &res,
2933 };
008f55d0 2934
aa9c2669
DQ		 2935 bitmask[0] = nfs4_fattr_bitmap[0];
2936 bitmask[1] = nfs4_fattr_bitmap[1];
2937 /*
2938 * Process the label in the upcoming getfattr
2939 */
2940 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2941
0e574af1 2942 nfs_fattr_init(info->fattr);
7c513058 2943 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2944}
2945
2946static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2947 struct nfs_fsinfo *info)
2948{
2949 struct nfs4_exception exception = { };
2950 int err;
2951 do {
fb8a5ba8 2952 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2953 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2954 switch (err) {
2955 case 0:
2956 case -NFS4ERR_WRONGSEC:
05e9cfb4 2957 goto out;
fb8a5ba8
BS		 2958 default:
2959 err = nfs4_handle_exception(server, err, &exception);
2960 }
1da177e4 2961 } while (exception.retry);
05e9cfb4 2962out:
1da177e4
LT		 2963 return err;
2964}
2965
8f70e95f
BS		 2966static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2967 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2968{
c2190661
TM		 2969 struct rpc_auth_create_args auth_args = {
2970 .pseudoflavor = flavor,
2971 };
8f70e95f
BS		 2972 struct rpc_auth *auth;
2973 int ret;
2974
c2190661 2975 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 2976 if (IS_ERR(auth)) {
75bc8821 2977 ret = -EACCES;
8f70e95f
BS		 2978 goto out;
2979 }
2980 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2981out:
2982 return ret;
2983}
2984
9a744ba3
CL		 2985/*
2986 * Retry pseudoroot lookup with various security flavors. We do this when:
2987 *
2988 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2989 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2990 *
2991 * Returns zero on success, or a negative NFS4ERR value, or a
2992 * negative errno value.
2993 */
801a16dc 2994static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2995 struct nfs_fsinfo *info)
1da177e4 2996{
9a744ba3
CL		 2997 /* Per 3530bis 15.33.5 */
2998 static const rpc_authflavor_t flav_array[] = {
2999 RPC_AUTH_GSS_KRB5P,
3000 RPC_AUTH_GSS_KRB5I,
3001 RPC_AUTH_GSS_KRB5,
c4eafe11 3002 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3003 RPC_AUTH_NULL,
3004 };
3005 int status = -EPERM;
3006 size_t i;
6a1a1e34 3007
4d4b69dd
WAA		 3008 if (server->auth_info.flavor_len > 0) {
3009 /* try each flavor specified by user */
3010 for (i = 0; i < server->auth_info.flavor_len; i++) {
3011 status = nfs4_lookup_root_sec(server, fhandle, info,
3012 server->auth_info.flavors[i]);
3013 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3014 continue;
3015 break;
3016 }
3017 } else {
3018 /* no flavors specified by user, try default list */
3019 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3020 status = nfs4_lookup_root_sec(server, fhandle, info,
3021 flav_array[i]);
3022 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3023 continue;
3024 break;
3025 }
8f70e95f 3026 }
9a744ba3 3027
fb8a5ba8
BS		 3028 /*
3029 * -EACCESS could mean that the user doesn't have correct permissions
3030 * to access the mount. It could also mean that we tried to mount
3031 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3032 * existing mount programs don't handle -EACCES very well so it should
3033 * be mapped to -EPERM instead.
3034 */
3035 if (status == -EACCES)
3036 status = -EPERM;
801a16dc
BS		 3037 return status;
3038}
3039
2ed4b95b
CL		 3040static int nfs4_do_find_root_sec(struct nfs_server *server,
3041 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3042{
3043 int mv = server->nfs_client->cl_minorversion;
3044 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3045}
3046
3047/**
3048 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3049 * @server: initialized nfs_server handle
3050 * @fhandle: we fill in the pseudo-fs root file handle
3051 * @info: we fill in an FSINFO struct
5e6b1990 3052 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3053 *
3054 * Returns zero on success, or a negative errno.
801a16dc 3055 */
3028eb2b 3056int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3057 struct nfs_fsinfo *info,
3058 bool auth_probe)
801a16dc 3059{
2ed4b95b
CL		 3060 int status;
3061
5e6b1990
TM		 3062 switch (auth_probe) {
3063 case false:
3064 status = nfs4_lookup_root(server, fhandle, info);
3065 if (status != -NFS4ERR_WRONGSEC)
3066 break;
5e6b1990 3067 default:
2ed4b95b 3068 status = nfs4_do_find_root_sec(server, fhandle, info);
5e6b1990 3069 }
2ed4b95b 3070
1da177e4
LT		 3071 if (status == 0)
3072 status = nfs4_server_capabilities(server, fhandle);
3073 if (status == 0)
3074 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3075
c12e87f4 3076 return nfs4_map_errors(status);
1da177e4
LT		 3077}
3078
bae36241
BS		 3079static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3080 struct nfs_fsinfo *info)
3081{
3082 int error;
3083 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3084 struct nfs4_label *label = NULL;
bae36241
BS		 3085
3086 error = nfs4_server_capabilities(server, mntfh);
3087 if (error < 0) {
3088 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3089 return error;
3090 }
3091
14c43f76
DQ		 3092 label = nfs4_label_alloc(server, GFP_KERNEL);
3093 if (IS_ERR(label))
3094 return PTR_ERR(label);
3095
1775fd3e 3096 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3097 if (error < 0) {
3098 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3099 goto err_free_label;
bae36241
BS		 3100 }
3101
3102 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3103 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3104 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3105
14c43f76
DQ		 3106err_free_label:
3107 nfs4_label_free(label);
3108
bae36241
BS		 3109 return error;
3110}
3111
6b97fd3d
MN		 3112/*
3113 * Get locations and (maybe) other attributes of a referral.
3114 * Note that we'll actually follow the referral later when
3115 * we detect fsid mismatch in inode revalidation
3116 */
f05d147f
BS		 3117static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3118 const struct qstr *name, struct nfs_fattr *fattr,
3119 struct nfs_fh *fhandle)
6b97fd3d
MN		 3120{
3121 int status = -ENOMEM;
3122 struct page *page = NULL;
3123 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3124
3125 page = alloc_page(GFP_KERNEL);
3126 if (page == NULL)
3127 goto out;
3128 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3129 if (locations == NULL)
3130 goto out;
3131
f05d147f 3132 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3133 if (status != 0)
3134 goto out;
519ae255
CL		 3135
3136 /*
3137 * If the fsid didn't change, this is a migration event, not a
3138 * referral. Cause us to drop into the exception handler, which
3139 * will kick off migration recovery.
3140 */
6b97fd3d 3141 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3142 dprintk("%s: server did not return a different fsid for"
3143 " a referral at %s\n", __func__, name->name);
519ae255 3144 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3145 goto out;
3146 }
533eb461
AA		 3147 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3148 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3149
533eb461 3150 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3151 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3152 memset(fhandle, 0, sizeof(struct nfs_fh));
3153out:
3154 if (page)
3155 __free_page(page);
5d7ca35a 3156 kfree(locations);
6b97fd3d
MN		 3157 return status;
3158}
3159
1775fd3e
DQ		 3160static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3161 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3162{
3163 struct nfs4_getattr_arg args = {
3164 .fh = fhandle,
3165 .bitmask = server->attr_bitmask,
3166 };
3167 struct nfs4_getattr_res res = {
3168 .fattr = fattr,
1775fd3e 3169 .label = label,
1da177e4
LT		 3170 .server = server,
3171 };
3172 struct rpc_message msg = {
3173 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3174 .rpc_argp = &args,
3175 .rpc_resp = &res,
3176 };
aa9c2669
DQ		 3177
3178 args.bitmask = nfs4_bitmask(server, label);
3179
0e574af1 3180 nfs_fattr_init(fattr);
7c513058 3181 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3182}
3183
1775fd3e
DQ		 3184static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3185 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3186{
3187 struct nfs4_exception exception = { };
3188 int err;
3189 do {
b5f875a9
TM		 3190 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3191 trace_nfs4_getattr(server, fhandle, fattr, err);
3192 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3193 &exception);
3194 } while (exception.retry);
3195 return err;
3196}
3197
3198/*
3199 * The file is not closed if it is opened due to the a request to change
3200 * the size of the file. The open call will not be needed once the
3201 * VFS layer lookup-intents are implemented.
3202 *
3203 * Close is called when the inode is destroyed.
3204 * If we haven't opened the file for O_WRONLY, we
3205 * need to in the size_change case to obtain a stateid.
3206 *
3207 * Got race?
3208 * Because OPEN is always done by name in nfsv4, it is
3209 * possible that we opened a different file by the same
3210 * name. We can recognize this race condition, but we
3211 * can't do anything about it besides returning an error.
3212 *
3213 * This will be fixed with VFS changes (lookup-intent).
3214 */
3215static int
3216nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3217 struct iattr *sattr)
3218{
08e9eac4 3219 struct inode *inode = dentry->d_inode;
659bfcd6 3220 struct rpc_cred *cred = NULL;
d530838b 3221 struct nfs4_state *state = NULL;
14c43f76 3222 struct nfs4_label *label = NULL;
1da177e4
LT		 3223 int status;
3224
88ac815c
PT		 3225 if (pnfs_ld_layoutret_on_setattr(inode) &&
3226 sattr->ia_valid & ATTR_SIZE &&
3227 sattr->ia_size < i_size_read(inode))
24028672 3228 pnfs_commit_and_return_layout(inode);
8a1636c4 3229
0e574af1 3230 nfs_fattr_init(fattr);
1da177e4 3231
2669940d
AA		 3232 /* Deal with open(O_TRUNC) */
3233 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3234 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3235
3236 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3237 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3238 return 0;
3239
d530838b 3240 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3241 if (sattr->ia_valid & ATTR_FILE) {
3242 struct nfs_open_context *ctx;
3243
3244 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3245 if (ctx) {
3246 cred = ctx->cred;
3247 state = ctx->state;
3248 }
659bfcd6 3249 }
08e9eac4 3250
14c43f76
DQ		 3251 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3252 if (IS_ERR(label))
3253 return PTR_ERR(label);
3254
3255 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3256 if (status == 0) {
65e4308d 3257 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 3258 nfs_setsecurity(inode, fattr, label);
3259 }
14c43f76 3260 nfs4_label_free(label);
1da177e4
LT		 3261 return status;
3262}
3263
0c2e53f1
TM		 3264static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3265 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3266 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3267{
0c2e53f1 3268 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3269 int status;
3270 struct nfs4_lookup_arg args = {
3271 .bitmask = server->attr_bitmask,
0c2e53f1 3272 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3273 .name = name,
3274 };
3275 struct nfs4_lookup_res res = {
3276 .server = server,
3277 .fattr = fattr,
aa9c2669 3278 .label = label,
2b3de441
DH		 3279 .fh = fhandle,
3280 };
3281 struct rpc_message msg = {
3282 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3283 .rpc_argp = &args,
3284 .rpc_resp = &res,
3285 };
3286
aa9c2669
DQ		 3287 args.bitmask = nfs4_bitmask(server, label);
3288
2b3de441
DH		 3289 nfs_fattr_init(fattr);
3290
1da177e4 3291 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3292 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3293 dprintk("NFS reply lookup: %d\n", status);
3294 return status;
3295}
3296
72de53ec 3297static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3298{
7ebb9315 3299 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3300 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3301 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3302 fattr->nlink = 2;
3303}
3304
72de53ec
BS		 3305static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3306 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3307 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3308{
3309 struct nfs4_exception exception = { };
72de53ec 3310 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3311 int err;
3312 do {
1775fd3e 3313 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3314 trace_nfs4_lookup(dir, name, err);
72de53ec 3315 switch (err) {
08ef7bd3 3316 case -NFS4ERR_BADNAME:
72de53ec
BS		 3317 err = -ENOENT;
3318 goto out;
0c2e53f1 3319 case -NFS4ERR_MOVED:
f05d147f 3320 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3321 goto out;
0c2e53f1 3322 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3323 err = -EPERM;
3324 if (client != *clnt)
3325 goto out;
66b06860 3326 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3327 if (IS_ERR(client))
3328 return PTR_ERR(client);
3329
3330 exception.retry = 1;
3331 break;
3332 default:
3333 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3334 }
1da177e4 3335 } while (exception.retry);
72de53ec
BS		 3336
3337out:
3338 if (err == 0)
3339 *clnt = client;
3340 else if (client != *clnt)
3341 rpc_shutdown_client(client);
3342
1da177e4
LT		 3343 return err;
3344}
3345
80a16b21 3346static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3347 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3348 struct nfs4_label *label)
72de53ec
BS		 3349{
3350 int status;
3351 struct rpc_clnt *client = NFS_CLIENT(dir);
3352
1775fd3e 3353 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3354 if (client != NFS_CLIENT(dir)) {
3355 rpc_shutdown_client(client);
3356 nfs_fixup_secinfo_attributes(fattr);
3357 }
3358 return status;
3359}
3360
f05d147f
BS		 3361struct rpc_clnt *
3362nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3363 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3364{
b72888cb 3365 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3366 int status;
f05d147f 3367
1775fd3e 3368 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3369 if (status < 0)
f05d147f 3370 return ERR_PTR(status);
b72888cb 3371 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3372}
3373
1da177e4
LT		 3374static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3375{
76b32999 3376 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3377 struct nfs4_accessargs args = {
3378 .fh = NFS_FH(inode),
a4980e78 3379 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3380 };
3381 struct nfs4_accessres res = {
3382 .server = server,
1da177e4 3383 };
1da177e4
LT		 3384 struct rpc_message msg = {
3385 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3386 .rpc_argp = &args,
3387 .rpc_resp = &res,
3388 .rpc_cred = entry->cred,
3389 };
3390 int mode = entry->mask;
aa9c2669 3391 int status = 0;
1da177e4
LT		 3392
3393 /*
3394 * Determine which access bits we want to ask for...
3395 */
3396 if (mode & MAY_READ)
3397 args.access |= NFS4_ACCESS_READ;
3398 if (S_ISDIR(inode->i_mode)) {
3399 if (mode & MAY_WRITE)
3400 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3401 if (mode & MAY_EXEC)
3402 args.access |= NFS4_ACCESS_LOOKUP;
3403 } else {
3404 if (mode & MAY_WRITE)
3405 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3406 if (mode & MAY_EXEC)
3407 args.access |= NFS4_ACCESS_EXECUTE;
3408 }
c407d41a
TM		 3409
3410 res.fattr = nfs_alloc_fattr();
3411 if (res.fattr == NULL)
3412 return -ENOMEM;
3413
7c513058 3414 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3415 if (!status) {
6168f62c 3416 nfs_access_set_mask(entry, res.access);
c407d41a 3417 nfs_refresh_inode(inode, res.fattr);
1da177e4 3418 }
c407d41a 3419 nfs_free_fattr(res.fattr);
1da177e4
LT		 3420 return status;
3421}
3422
3423static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3424{
3425 struct nfs4_exception exception = { };
3426 int err;
3427 do {
c1578b76
TM		 3428 err = _nfs4_proc_access(inode, entry);
3429 trace_nfs4_access(inode, err);
3430 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3431 &exception);
3432 } while (exception.retry);
3433 return err;
3434}
3435
3436/*
3437 * TODO: For the time being, we don't try to get any attributes
3438 * along with any of the zero-copy operations READ, READDIR,
3439 * READLINK, WRITE.
3440 *
3441 * In the case of the first three, we want to put the GETATTR
3442 * after the read-type operation -- this is because it is hard
3443 * to predict the length of a GETATTR response in v4, and thus
3444 * align the READ data correctly. This means that the GETATTR
3445 * may end up partially falling into the page cache, and we should
3446 * shift it into the 'tail' of the xdr_buf before processing.
3447 * To do this efficiently, we need to know the total length
3448 * of data received, which doesn't seem to be available outside
3449 * of the RPC layer.
3450 *
3451 * In the case of WRITE, we also want to put the GETATTR after
3452 * the operation -- in this case because we want to make sure
140150db 3453 * we get the post-operation mtime and size.
1da177e4
LT		 3454 *
3455 * Both of these changes to the XDR layer would in fact be quite
3456 * minor, but I decided to leave them for a subsequent patch.
3457 */
3458static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3459 unsigned int pgbase, unsigned int pglen)
3460{
3461 struct nfs4_readlink args = {
3462 .fh = NFS_FH(inode),
3463 .pgbase = pgbase,
3464 .pglen = pglen,
3465 .pages = &page,
3466 };
f50c7000 3467 struct nfs4_readlink_res res;
1da177e4
LT		 3468 struct rpc_message msg = {
3469 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3470 .rpc_argp = &args,
f50c7000 3471 .rpc_resp = &res,
1da177e4
LT		 3472 };
3473
7c513058 3474 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3475}
3476
3477static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3478 unsigned int pgbase, unsigned int pglen)
3479{
3480 struct nfs4_exception exception = { };
3481 int err;
3482 do {
c1578b76
TM		 3483 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3484 trace_nfs4_readlink(inode, err);
3485 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3486 &exception);
3487 } while (exception.retry);
3488 return err;
3489}
3490
1da177e4 3491/*
8867fe58 3492 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3493 */
1da177e4
LT		 3494static int
3495nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3496 int flags)
1da177e4 3497{
aa9c2669 3498 struct nfs4_label l, *ilabel = NULL;
8867fe58 3499 struct nfs_open_context *ctx;
1da177e4 3500 struct nfs4_state *state;
5bc2afc2 3501 int opened = 0;
1da177e4
LT		 3502 int status = 0;
3503
8867fe58
MS		 3504 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3505 if (IS_ERR(ctx))
3506 return PTR_ERR(ctx);
3507
aa9c2669
DQ		 3508 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3509
a8a5da99 3510 sattr->ia_mode &= ~current_umask();
5bc2afc2 3511 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3512 if (IS_ERR(state)) {
3513 status = PTR_ERR(state);
c0204fd2 3514 goto out;
1da177e4 3515 }
1da177e4 3516out:
aa9c2669 3517 nfs4_label_release_security(ilabel);
8867fe58 3518 put_nfs_open_context(ctx);
1da177e4
LT		 3519 return status;
3520}
3521
3522static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3523{
16e42959 3524 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3525 struct nfs_removeargs args = {
1da177e4 3526 .fh = NFS_FH(dir),
26fe5750 3527 .name = *name,
16e42959 3528 };
4fdc17b2 3529 struct nfs_removeres res = {
16e42959 3530 .server = server,
1da177e4 3531 };
1da177e4 3532 struct rpc_message msg = {
4fdc17b2
TM		 3533 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3534 .rpc_argp = &args,
3535 .rpc_resp = &res,
1da177e4 3536 };
778d2817 3537 int status;
1da177e4 3538
7c513058 3539 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3540 if (status == 0)
16e42959 3541 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3542 return status;
3543}
3544
3545static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3546{
3547 struct nfs4_exception exception = { };
3548 int err;
3549 do {
078ea3df
TM		 3550 err = _nfs4_proc_remove(dir, name);
3551 trace_nfs4_remove(dir, name, err);
3552 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3553 &exception);
3554 } while (exception.retry);
3555 return err;
3556}
3557
e4eff1a6 3558static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3559{
e4eff1a6
TM		 3560 struct nfs_server *server = NFS_SERVER(dir);
3561 struct nfs_removeargs *args = msg->rpc_argp;
3562 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3563
e4eff1a6 3564 res->server = server;
1da177e4 3565 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3566 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3567
3568 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3569}
3570
34e137cc
BS		 3571static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3572{
d9afbd1b
TM		 3573 nfs4_setup_sequence(NFS_SERVER(data->dir),
3574 &data->args.seq_args,
3575 &data->res.seq_res,
3576 task);
1da177e4
LT		 3577}
3578
e4eff1a6 3579static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3580{
078ea3df
TM		 3581 struct nfs_unlinkdata *data = task->tk_calldata;
3582 struct nfs_removeres *res = &data->res;
e4eff1a6 3583
14516c3a
TM		 3584 if (!nfs4_sequence_done(task, &res->seq_res))
3585 return 0;
8478eaa1
N		 3586 if (nfs4_async_handle_error(task, res->server, NULL,
3587 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3588 return 0;
3589 update_changeattr(dir, &res->cinfo);
e4eff1a6 3590 return 1;
1da177e4
LT		 3591}
3592
d3d4152a
JL		 3593static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3594{
3595 struct nfs_server *server = NFS_SERVER(dir);
3596 struct nfs_renameargs *arg = msg->rpc_argp;
3597 struct nfs_renameres *res = msg->rpc_resp;
3598
3599 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3600 res->server = server;
a9c92d6b 3601 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3602}
3603
c6bfa1a1
BS		 3604static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3605{
d9afbd1b
TM		 3606 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3607 &data->args.seq_args,
3608 &data->res.seq_res,
3609 task);
d3d4152a
JL		 3610}
3611
3612static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3613 struct inode *new_dir)
3614{
fbc6f7c2
TM		 3615 struct nfs_renamedata *data = task->tk_calldata;
3616 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3617
3618 if (!nfs4_sequence_done(task, &res->seq_res))
3619 return 0;
8478eaa1 3620 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3621 return 0;
3622
3623 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3624 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3625 return 1;
3626}
3627
1da177e4
LT		 3628static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3629{
91ba2eee 3630 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3631 struct nfs4_link_arg arg = {
3632 .fh = NFS_FH(inode),
3633 .dir_fh = NFS_FH(dir),
3634 .name = name,
91ba2eee
TM		 3635 .bitmask = server->attr_bitmask,
3636 };
91ba2eee
TM		 3637 struct nfs4_link_res res = {
3638 .server = server,
1775fd3e 3639 .label = NULL,
1da177e4 3640 };
1da177e4
LT		 3641 struct rpc_message msg = {
3642 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3643 .rpc_argp = &arg,
91ba2eee 3644 .rpc_resp = &res,
1da177e4 3645 };
136f2627
TM		 3646 int status = -ENOMEM;
3647
3648 res.fattr = nfs_alloc_fattr();
778d2817 3649 if (res.fattr == NULL)
136f2627 3650 goto out;
1da177e4 3651
14c43f76
DQ		 3652 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3653 if (IS_ERR(res.label)) {
3654 status = PTR_ERR(res.label);
3655 goto out;
3656 }
aa9c2669 3657 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3658
7c513058 3659 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3660 if (!status) {
3661 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3662 status = nfs_post_op_update_inode(inode, res.fattr);
3663 if (!status)
3664 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3665 }
14c43f76
DQ		 3666
3667
3668 nfs4_label_free(res.label);
3669
136f2627 3670out:
136f2627 3671 nfs_free_fattr(res.fattr);
1da177e4
LT		 3672 return status;
3673}
3674
3675static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3676{
3677 struct nfs4_exception exception = { };
3678 int err;
3679 do {
3680 err = nfs4_handle_exception(NFS_SERVER(inode),
3681 _nfs4_proc_link(inode, dir, name),
3682 &exception);
3683 } while (exception.retry);
3684 return err;
3685}
3686
57dc9a57
TM		 3687struct nfs4_createdata {
3688 struct rpc_message msg;
3689 struct nfs4_create_arg arg;
3690 struct nfs4_create_res res;
3691 struct nfs_fh fh;
3692 struct nfs_fattr fattr;
1775fd3e 3693 struct nfs4_label *label;
57dc9a57
TM		 3694};
3695
3696static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3697 struct qstr *name, struct iattr *sattr, u32 ftype)
3698{
3699 struct nfs4_createdata *data;
3700
3701 data = kzalloc(sizeof(*data), GFP_KERNEL);
3702 if (data != NULL) {
3703 struct nfs_server *server = NFS_SERVER(dir);
3704
14c43f76
DQ		 3705 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3706 if (IS_ERR(data->label))
3707 goto out_free;
3708
57dc9a57
TM		 3709 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3710 data->msg.rpc_argp = &data->arg;
3711 data->msg.rpc_resp = &data->res;
3712 data->arg.dir_fh = NFS_FH(dir);
3713 data->arg.server = server;
3714 data->arg.name = name;
3715 data->arg.attrs = sattr;
3716 data->arg.ftype = ftype;
aa9c2669 3717 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3718 data->res.server = server;
3719 data->res.fh = &data->fh;
3720 data->res.fattr = &data->fattr;
1775fd3e 3721 data->res.label = data->label;
57dc9a57 3722 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3723 }
3724 return data;
14c43f76
DQ		 3725out_free:
3726 kfree(data);
3727 return NULL;
57dc9a57
TM		 3728}
3729
3730static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3731{
7c513058 3732 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3733 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3734 if (status == 0) {
3735 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3736 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3737 }
3738 return status;
3739}
3740
3741static void nfs4_free_createdata(struct nfs4_createdata *data)
3742{
14c43f76 3743 nfs4_label_free(data->label);
57dc9a57
TM		 3744 kfree(data);
3745}
3746
4f390c15 3747static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3748 struct page *page, unsigned int len, struct iattr *sattr,
3749 struct nfs4_label *label)
1da177e4 3750{
57dc9a57
TM		 3751 struct nfs4_createdata *data;
3752 int status = -ENAMETOOLONG;
1da177e4 3753
94a6d753 3754 if (len > NFS4_MAXPATHLEN)
57dc9a57 3755 goto out;
4f390c15 3756
57dc9a57
TM		 3757 status = -ENOMEM;
3758 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3759 if (data == NULL)
3760 goto out;
3761
3762 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3763 data->arg.u.symlink.pages = &page;
3764 data->arg.u.symlink.len = len;
1775fd3e 3765 data->arg.label = label;
1da177e4 3766
57dc9a57
TM		 3767 status = nfs4_do_create(dir, dentry, data);
3768
3769 nfs4_free_createdata(data);
3770out:
1da177e4
LT		 3771 return status;
3772}
3773
4f390c15 3774static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3775 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3776{
3777 struct nfs4_exception exception = { };
aa9c2669 3778 struct nfs4_label l, *label = NULL;
1da177e4 3779 int err;
aa9c2669
DQ		 3780
3781 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3782
1da177e4 3783 do {
078ea3df
TM		 3784 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3785 trace_nfs4_symlink(dir, &dentry->d_name, err);
3786 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3787 &exception);
3788 } while (exception.retry);
aa9c2669
DQ		 3789
3790 nfs4_label_release_security(label);
1da177e4
LT		 3791 return err;
3792}
3793
3794static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3795 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3796{
57dc9a57
TM		 3797 struct nfs4_createdata *data;
3798 int status = -ENOMEM;
1da177e4 3799
57dc9a57
TM		 3800 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3801 if (data == NULL)
3802 goto out;
3803
1775fd3e 3804 data->arg.label = label;
57dc9a57
TM		 3805 status = nfs4_do_create(dir, dentry, data);
3806
3807 nfs4_free_createdata(data);
3808out:
1da177e4
LT		 3809 return status;
3810}
3811
3812static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3813 struct iattr *sattr)
3814{
3815 struct nfs4_exception exception = { };
aa9c2669 3816 struct nfs4_label l, *label = NULL;
1da177e4 3817 int err;
a8a5da99 3818
aa9c2669
DQ		 3819 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3820
a8a5da99 3821 sattr->ia_mode &= ~current_umask();
1da177e4 3822 do {
078ea3df
TM		 3823 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3824 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3825 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3826 &exception);
3827 } while (exception.retry);
aa9c2669
DQ		 3828 nfs4_label_release_security(label);
3829
1da177e4
LT		 3830 return err;
3831}
3832
3833static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3834 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3835{
3836 struct inode *dir = dentry->d_inode;
3837 struct nfs4_readdir_arg args = {
3838 .fh = NFS_FH(dir),
56e4ebf8 3839 .pages = pages,
1da177e4
LT		 3840 .pgbase = 0,
3841 .count = count,
96d25e53 3842 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3843 .plus = plus,
1da177e4
LT		 3844 };
3845 struct nfs4_readdir_res res;
3846 struct rpc_message msg = {
3847 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3848 .rpc_argp = &args,
3849 .rpc_resp = &res,
3850 .rpc_cred = cred,
3851 };
3852 int status;
3853
6de1472f
AV		 3854 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3855 dentry,
eadf4598 3856 (unsigned long long)cookie);
c3f52af3 3857 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3858 res.pgbase = args.pgbase;
7c513058 3859 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3860 if (status >= 0) {
c3f52af3 3861 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3862 status += args.pgbase;
3863 }
c4812998
TM		 3864
3865 nfs_invalidate_atime(dir);
3866
3110ff80 3867 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3868 return status;
3869}
3870
3871static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3872 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3873{
3874 struct nfs4_exception exception = { };
3875 int err;
3876 do {
c1578b76
TM		 3877 err = _nfs4_proc_readdir(dentry, cred, cookie,
3878 pages, count, plus);
3879 trace_nfs4_readdir(dentry->d_inode, err);
3880 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3881 &exception);
3882 } while (exception.retry);
3883 return err;
3884}
3885
3886static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3887 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3888{
57dc9a57
TM		 3889 struct nfs4_createdata *data;
3890 int mode = sattr->ia_mode;
3891 int status = -ENOMEM;
1da177e4 3892
57dc9a57
TM		 3893 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3894 if (data == NULL)
3895 goto out;
3896
1da177e4 3897 if (S_ISFIFO(mode))
57dc9a57 3898 data->arg.ftype = NF4FIFO;
1da177e4 3899 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3900 data->arg.ftype = NF4BLK;
3901 data->arg.u.device.specdata1 = MAJOR(rdev);
3902 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3903 }
3904 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3905 data->arg.ftype = NF4CHR;
3906 data->arg.u.device.specdata1 = MAJOR(rdev);
3907 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3908 } else if (!S_ISSOCK(mode)) {
3909 status = -EINVAL;
3910 goto out_free;
1da177e4 3911 }
1775fd3e 3912
aa9c2669 3913 data->arg.label = label;
57dc9a57 3914 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3915out_free:
57dc9a57
TM		 3916 nfs4_free_createdata(data);
3917out:
1da177e4
LT		 3918 return status;
3919}
3920
3921static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3922 struct iattr *sattr, dev_t rdev)
3923{
3924 struct nfs4_exception exception = { };
aa9c2669 3925 struct nfs4_label l, *label = NULL;
1da177e4 3926 int err;
a8a5da99 3927
aa9c2669
DQ		 3928 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3929
a8a5da99 3930 sattr->ia_mode &= ~current_umask();
1da177e4 3931 do {
078ea3df
TM		 3932 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3933 trace_nfs4_mknod(dir, &dentry->d_name, err);
3934 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3935 &exception);
3936 } while (exception.retry);
aa9c2669
DQ		 3937
3938 nfs4_label_release_security(label);
3939
1da177e4
LT		 3940 return err;
3941}
3942
3943static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3944 struct nfs_fsstat *fsstat)
3945{
3946 struct nfs4_statfs_arg args = {
3947 .fh = fhandle,
3948 .bitmask = server->attr_bitmask,
3949 };
24ad148a
BH		 3950 struct nfs4_statfs_res res = {
3951 .fsstat = fsstat,
3952 };
1da177e4
LT		 3953 struct rpc_message msg = {
3954 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3955 .rpc_argp = &args,
24ad148a 3956 .rpc_resp = &res,
1da177e4
LT		 3957 };
3958
0e574af1 3959 nfs_fattr_init(fsstat->fattr);
7c513058 3960 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3961}
3962
3963static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3964{
3965 struct nfs4_exception exception = { };
3966 int err;
3967 do {
3968 err = nfs4_handle_exception(server,
3969 _nfs4_proc_statfs(server, fhandle, fsstat),
3970 &exception);
3971 } while (exception.retry);
3972 return err;
3973}
3974
3975static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3976 struct nfs_fsinfo *fsinfo)
3977{
3978 struct nfs4_fsinfo_arg args = {
3979 .fh = fhandle,
3980 .bitmask = server->attr_bitmask,
3981 };
3dda5e43
BH		 3982 struct nfs4_fsinfo_res res = {
3983 .fsinfo = fsinfo,
3984 };
1da177e4
LT		 3985 struct rpc_message msg = {
3986 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3987 .rpc_argp = &args,
3dda5e43 3988 .rpc_resp = &res,
1da177e4
LT		 3989 };
3990
7c513058 3991 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3992}
3993
3994static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3995{
3996 struct nfs4_exception exception = { };
83ca7f5a 3997 unsigned long now = jiffies;
1da177e4
LT		 3998 int err;
3999
4000 do {
83ca7f5a 4001 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4002 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4003 if (err == 0) {
4004 struct nfs_client *clp = server->nfs_client;
4005
4006 spin_lock(&clp->cl_lock);
4007 clp->cl_lease_time = fsinfo->lease_time * HZ;
4008 clp->cl_last_renewal = now;
4009 spin_unlock(&clp->cl_lock);
4010 break;
4011 }
4012 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4013 } while (exception.retry);
4014 return err;
4015}
4016
4017static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4018{
e38eb650
BS		 4019 int error;
4020
0e574af1 4021 nfs_fattr_init(fsinfo->fattr);
e38eb650 4022 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4023 if (error == 0) {
4024 /* block layout checks this! */
4025 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4026 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4027 }
e38eb650
BS		 4028
4029 return error;
1da177e4
LT		 4030}
4031
4032static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4033 struct nfs_pathconf *pathconf)
4034{
4035 struct nfs4_pathconf_arg args = {
4036 .fh = fhandle,
4037 .bitmask = server->attr_bitmask,
4038 };
d45b2989
BH		 4039 struct nfs4_pathconf_res res = {
4040 .pathconf = pathconf,
4041 };
1da177e4
LT		 4042 struct rpc_message msg = {
4043 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4044 .rpc_argp = &args,
d45b2989 4045 .rpc_resp = &res,
1da177e4
LT		 4046 };
4047
4048 /* None of the pathconf attributes are mandatory to implement */
4049 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4050 memset(pathconf, 0, sizeof(*pathconf));
4051 return 0;
4052 }
4053
0e574af1 4054 nfs_fattr_init(pathconf->fattr);
7c513058 4055 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4056}
4057
4058static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4059 struct nfs_pathconf *pathconf)
4060{
4061 struct nfs4_exception exception = { };
4062 int err;
4063
4064 do {
4065 err = nfs4_handle_exception(server,
4066 _nfs4_proc_pathconf(server, fhandle, pathconf),
4067 &exception);
4068 } while (exception.retry);
4069 return err;
4070}
4071
5521abfd 4072int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4073 const struct nfs_open_context *ctx,
4074 const struct nfs_lock_context *l_ctx,
4075 fmode_t fmode)
4076{
4077 const struct nfs_lockowner *lockowner = NULL;
4078
4079 if (l_ctx != NULL)
4080 lockowner = &l_ctx->lockowner;
5521abfd 4081 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4082}
4083EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4084
5521abfd
TM		 4085static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4086 const struct nfs_open_context *ctx,
4087 const struct nfs_lock_context *l_ctx,
4088 fmode_t fmode)
4089{
4090 nfs4_stateid current_stateid;
4091
e1253be0
TM		 4092 /* If the current stateid represents a lost lock, then exit */
4093 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4094 return true;
5521abfd
TM		 4095 return nfs4_stateid_match(stateid, &current_stateid);
4096}
4097
4098static bool nfs4_error_stateid_expired(int err)
4099{
4100 switch (err) {
4101 case -NFS4ERR_DELEG_REVOKED:
4102 case -NFS4ERR_ADMIN_REVOKED:
4103 case -NFS4ERR_BAD_STATEID:
4104 case -NFS4ERR_STALE_STATEID:
4105 case -NFS4ERR_OLD_STATEID:
4106 case -NFS4ERR_OPENMODE:
4107 case -NFS4ERR_EXPIRED:
4108 return true;
4109 }
4110 return false;
4111}
4112
d45f60c6 4113void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4114{
d45f60c6 4115 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4116}
4117
d45f60c6 4118static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4119{
d45f60c6 4120 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4121
d45f60c6
WAA		 4122 trace_nfs4_read(hdr, task->tk_status);
4123 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4124 hdr->args.context->state,
4125 NULL) == -EAGAIN) {
d00c5d43 4126 rpc_restart_call_prepare(task);
ec06c096 4127 return -EAGAIN;
1da177e4 4128 }
8850df99 4129
d45f60c6 4130 __nfs4_read_done_cb(hdr);
1da177e4 4131 if (task->tk_status > 0)
d45f60c6 4132 renew_lease(server, hdr->timestamp);
ec06c096 4133 return 0;
1da177e4
LT		 4134}
4135
5521abfd 4136static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4137 struct nfs_pgio_args *args)
5521abfd
TM		 4138{
4139
4140 if (!nfs4_error_stateid_expired(task->tk_status) ||
4141 nfs4_stateid_is_current(&args->stateid,
4142 args->context,
4143 args->lock_context,
4144 FMODE_READ))
4145 return false;
4146 rpc_restart_call_prepare(task);
4147 return true;
4148}
4149
d45f60c6 4150static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4151{
4152
4153 dprintk("--> %s\n", __func__);
4154
d45f60c6 4155 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4156 return -EAGAIN;
d45f60c6 4157 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4158 return -EAGAIN;
d45f60c6
WAA		 4159 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4160 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4161}
4162
d45f60c6
WAA		 4163static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4164 struct rpc_message *msg)
1da177e4 4165{
d45f60c6
WAA		 4166 hdr->timestamp = jiffies;
4167 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4168 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4169 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4170}
4171
d45f60c6
WAA		 4172static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4173 struct nfs_pgio_header *hdr)
ea7c3303 4174{
d45f60c6
WAA		 4175 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4176 &hdr->args.seq_args,
4177 &hdr->res.seq_res,
9b206149 4178 task))
ef1820f9 4179 return 0;
d45f60c6
WAA		 4180 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4181 hdr->args.lock_context,
4182 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4183 return -EIO;
d45f60c6 4184 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4185 return -EIO;
4186 return 0;
1da177e4
LT		 4187}
4188
d45f60c6
WAA		 4189static int nfs4_write_done_cb(struct rpc_task *task,
4190 struct nfs_pgio_header *hdr)
1da177e4 4191{
d45f60c6 4192 struct inode *inode = hdr->inode;
8478eaa1 4193
d45f60c6
WAA		 4194 trace_nfs4_write(hdr, task->tk_status);
4195 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4196 hdr->args.context->state,
4197 NULL) == -EAGAIN) {
d00c5d43 4198 rpc_restart_call_prepare(task);
788e7a89 4199 return -EAGAIN;
1da177e4 4200 }
4f9838c7 4201 if (task->tk_status >= 0) {
d45f60c6
WAA		 4202 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4203 nfs_post_op_update_inode_force_wcc(inode, &hdr->fattr);
4f9838c7 4204 }
788e7a89 4205 return 0;
1da177e4
LT		 4206}
4207
5521abfd 4208static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4209 struct nfs_pgio_args *args)
5521abfd
TM		 4210{
4211
4212 if (!nfs4_error_stateid_expired(task->tk_status) ||
4213 nfs4_stateid_is_current(&args->stateid,
4214 args->context,
4215 args->lock_context,
4216 FMODE_WRITE))
4217 return false;
4218 rpc_restart_call_prepare(task);
4219 return true;
4220}
4221
d45f60c6 4222static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4223{
d45f60c6 4224 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4225 return -EAGAIN;
d45f60c6 4226 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4227 return -EAGAIN;
d45f60c6
WAA		 4228 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4229 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4230}
4231
5a37f851 4232static
d45f60c6 4233bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4234{
5a37f851 4235 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4236 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4237 return false;
4238 /* Otherwise, request attributes if and only if we don't hold
4239 * a delegation
4240 */
011e2a7f 4241 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4242}
a69aef14 4243
d45f60c6
WAA		 4244static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4245 struct rpc_message *msg)
1da177e4 4246{
d45f60c6 4247 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4248
d45f60c6
WAA		 4249 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4250 hdr->args.bitmask = NULL;
4251 hdr->res.fattr = NULL;
7ffd1064 4252 } else
d45f60c6 4253 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4254
d45f60c6
WAA		 4255 if (!hdr->pgio_done_cb)
4256 hdr->pgio_done_cb = nfs4_write_done_cb;
4257 hdr->res.server = server;
4258 hdr->timestamp = jiffies;
1da177e4 4259
bdc7f021 4260 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4261 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4262}
4263
0b7c0153 4264static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4265{
d9afbd1b
TM		 4266 nfs4_setup_sequence(NFS_SERVER(data->inode),
4267 &data->args.seq_args,
4268 &data->res.seq_res,
4269 task);
1da177e4
LT		 4270}
4271
0b7c0153 4272static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4273{
1da177e4 4274 struct inode *inode = data->inode;
14516c3a 4275
cc668ab3 4276 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4277 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4278 NULL, NULL) == -EAGAIN) {
d00c5d43 4279 rpc_restart_call_prepare(task);
788e7a89 4280 return -EAGAIN;
1da177e4 4281 }
788e7a89 4282 return 0;
1da177e4
LT		 4283}
4284
0b7c0153 4285static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4286{
4287 if (!nfs4_sequence_done(task, &data->res.seq_res))
4288 return -EAGAIN;
0b7c0153 4289 return data->commit_done_cb(task, data);
5f452431
FI		 4290}
4291
0b7c0153 4292static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4293{
788e7a89 4294 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4295
0b7c0153
FI		 4296 if (data->commit_done_cb == NULL)
4297 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4298 data->res.server = server;
bdc7f021 4299 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4300 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4301}
4302
9bc4e3ca
CL		 4303struct nfs4_renewdata {
4304 struct nfs_client *client;
4305 unsigned long timestamp;
4306};
4307
1da177e4
LT		 4308/*
4309 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4310 * standalone procedure for queueing an asynchronous RENEW.
4311 */
9bc4e3ca 4312static void nfs4_renew_release(void *calldata)
dc96aef9 4313{
9bc4e3ca
CL		 4314 struct nfs4_renewdata *data = calldata;
4315 struct nfs_client *clp = data->client;
dc96aef9 4316
0851de06
AB		 4317 if (atomic_read(&clp->cl_count) > 1)
4318 nfs4_schedule_state_renewal(clp);
4319 nfs_put_client(clp);
9bc4e3ca 4320 kfree(data);
dc96aef9
AB		 4321}
4322
9bc4e3ca 4323static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4324{
9bc4e3ca
CL		 4325 struct nfs4_renewdata *data = calldata;
4326 struct nfs_client *clp = data->client;
4327 unsigned long timestamp = data->timestamp;
1da177e4 4328
c6d01c6f 4329 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4330 switch (task->tk_status) {
4331 case 0:
4332 break;
4333 case -NFS4ERR_LEASE_MOVED:
4334 nfs4_schedule_lease_moved_recovery(clp);
4335 break;
4336 default:
95baa25c 4337 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4338 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4339 return;
4340 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4341 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4342 return;
4343 }
4344 nfs4_schedule_path_down_recovery(clp);
1da177e4 4345 }
452e9352 4346 do_renew_lease(clp, timestamp);
1da177e4
LT		 4347}
4348
963d8fe5
TM		 4349static const struct rpc_call_ops nfs4_renew_ops = {
4350 .rpc_call_done = nfs4_renew_done,
dc96aef9 4351 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4352};
4353
2f60ea6b 4354static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4355{
4356 struct rpc_message msg = {
4357 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4358 .rpc_argp = clp,
b4454fe1 4359 .rpc_cred = cred,
1da177e4 4360 };
9bc4e3ca 4361 struct nfs4_renewdata *data;
1da177e4 4362
2f60ea6b
TM		 4363 if (renew_flags == 0)
4364 return 0;
0851de06
AB		 4365 if (!atomic_inc_not_zero(&clp->cl_count))
4366 return -EIO;
b569ad34 4367 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4368 if (data == NULL)
4369 return -ENOMEM;
4370 data->client = clp;
4371 data->timestamp = jiffies;
bc7a05ca 4372 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4373 &nfs4_renew_ops, data);
1da177e4
LT		 4374}
4375
8534d4ec 4376static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4377{
4378 struct rpc_message msg = {
4379 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4380 .rpc_argp = clp,
b4454fe1 4381 .rpc_cred = cred,
1da177e4
LT		 4382 };
4383 unsigned long now = jiffies;
4384 int status;
4385
bc7a05ca 4386 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4387 if (status < 0)
4388 return status;
452e9352 4389 do_renew_lease(clp, now);
1da177e4
LT		 4390 return 0;
4391}
4392
aa1870af
BF		 4393static inline int nfs4_server_supports_acls(struct nfs_server *server)
4394{
7dd7d959 4395 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4396}
4397
21f498c2
TM		 4398/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4399 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4400 * the stack.
4401 */
21f498c2 4402#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4403
e9e3d724
NH		 4404static int buf_to_pages_noslab(const void *buf, size_t buflen,
4405 struct page **pages, unsigned int *pgbase)
4406{
4407 struct page *newpage, **spages;
4408 int rc = 0;
4409 size_t len;
4410 spages = pages;
4411
4412 do {
21f498c2 4413 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4414 newpage = alloc_page(GFP_KERNEL);
4415
4416 if (newpage == NULL)
4417 goto unwind;
4418 memcpy(page_address(newpage), buf, len);
4419 buf += len;
4420 buflen -= len;
4421 *pages++ = newpage;
4422 rc++;
4423 } while (buflen != 0);
4424
4425 return rc;
4426
4427unwind:
4428 for(; rc > 0; rc--)
4429 __free_page(spages[rc-1]);
4430 return -ENOMEM;
4431}
4432
e50a1c2e
BF		 4433struct nfs4_cached_acl {
4434 int cached;
4435 size_t len;
3e9d4154 4436 char data[0];
e50a1c2e
BF		 4437};
4438
4439static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4440{
4441 struct nfs_inode *nfsi = NFS_I(inode);
4442
4443 spin_lock(&inode->i_lock);
4444 kfree(nfsi->nfs4_acl);
4445 nfsi->nfs4_acl = acl;
4446 spin_unlock(&inode->i_lock);
4447}
4448
4449static void nfs4_zap_acl_attr(struct inode *inode)
4450{
4451 nfs4_set_cached_acl(inode, NULL);
4452}
4453
4454static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4455{
4456 struct nfs_inode *nfsi = NFS_I(inode);
4457 struct nfs4_cached_acl *acl;
4458 int ret = -ENOENT;
4459
4460 spin_lock(&inode->i_lock);
4461 acl = nfsi->nfs4_acl;
4462 if (acl == NULL)
4463 goto out;
4464 if (buf == NULL) /* user is just asking for length */
4465 goto out_len;
4466 if (acl->cached == 0)
4467 goto out;
4468 ret = -ERANGE; /* see getxattr(2) man page */
4469 if (acl->len > buflen)
4470 goto out;
4471 memcpy(buf, acl->data, acl->len);
4472out_len:
4473 ret = acl->len;
4474out:
4475 spin_unlock(&inode->i_lock);
4476 return ret;
4477}
4478
5794d21e 4479static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4480{
4481 struct nfs4_cached_acl *acl;
b291f1b1 4482 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4483
1f1ea6c2 4484 if (buflen <= PAGE_SIZE) {
b291f1b1 4485 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4486 if (acl == NULL)
4487 goto out;
4488 acl->cached = 1;
5794d21e 4489 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4490 } else {
4491 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4492 if (acl == NULL)
4493 goto out;
4494 acl->cached = 0;
4495 }
4496 acl->len = acl_len;
4497out:
4498 nfs4_set_cached_acl(inode, acl);
4499}
4500
bf118a34
AA		 4501/*
4502 * The getxattr API returns the required buffer length when called with a
4503 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4504 * the required buf. On a NULL buf, we send a page of data to the server
4505 * guessing that the ACL request can be serviced by a page. If so, we cache
4506 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4507 * the cache. If not so, we throw away the page, and cache the required
4508 * length. The next getxattr call will then produce another round trip to
4509 * the server, this time with the input buf of the required size.
4510 */
16b4289c 4511static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4512{
bf118a34 4513 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4514 struct nfs_getaclargs args = {
4515 .fh = NFS_FH(inode),
4516 .acl_pages = pages,
4517 .acl_len = buflen,
4518 };
663c79b3
BH		 4519 struct nfs_getaclres res = {
4520 .acl_len = buflen,
4521 };
aa1870af
BF		 4522 struct rpc_message msg = {
4523 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4524 .rpc_argp = &args,
663c79b3 4525 .rpc_resp = &res,
aa1870af 4526 };
21f498c2
TM		 4527 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4528 int ret = -ENOMEM, i;
aa1870af 4529
bf118a34
AA		 4530 /* As long as we're doing a round trip to the server anyway,
4531 * let's be prepared for a page of acl data. */
4532 if (npages == 0)
4533 npages = 1;
21f498c2
TM		 4534 if (npages > ARRAY_SIZE(pages))
4535 return -ERANGE;
5a006899 4536
bf118a34
AA		 4537 for (i = 0; i < npages; i++) {
4538 pages[i] = alloc_page(GFP_KERNEL);
4539 if (!pages[i])
4540 goto out_free;
e50a1c2e 4541 }
5a006899
SP		 4542
4543 /* for decoding across pages */
4544 res.acl_scratch = alloc_page(GFP_KERNEL);
4545 if (!res.acl_scratch)
4546 goto out_free;
4547
bf118a34
AA		 4548 args.acl_len = npages * PAGE_SIZE;
4549 args.acl_pgbase = 0;
5a006899 4550
de040bec 4551 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4552 __func__, buf, buflen, npages, args.acl_len);
4553 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4554 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4555 if (ret)
4556 goto out_free;
bf118a34 4557
1f1ea6c2
TM		 4558 /* Handle the case where the passed-in buffer is too short */
4559 if (res.acl_flags & NFS4_ACL_TRUNC) {
4560 /* Did the user only issue a request for the acl length? */
4561 if (buf == NULL)
4562 goto out_ok;
e50a1c2e 4563 ret = -ERANGE;
1f1ea6c2 4564 goto out_free;
e50a1c2e 4565 }
1f1ea6c2 4566 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4567 if (buf) {
4568 if (res.acl_len > buflen) {
4569 ret = -ERANGE;
4570 goto out_free;
4571 }
1f1ea6c2 4572 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4573 }
1f1ea6c2
TM		 4574out_ok:
4575 ret = res.acl_len;
e50a1c2e 4576out_free:
bf118a34
AA		 4577 for (i = 0; i < npages; i++)
4578 if (pages[i])
4579 __free_page(pages[i]);
331818f1
TM		 4580 if (res.acl_scratch)
4581 __free_page(res.acl_scratch);
aa1870af
BF		 4582 return ret;
4583}
4584
16b4289c
TM		 4585static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4586{
4587 struct nfs4_exception exception = { };
4588 ssize_t ret;
4589 do {
4590 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4591 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4592 if (ret >= 0)
4593 break;
4594 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4595 } while (exception.retry);
4596 return ret;
4597}
4598
e50a1c2e
BF		 4599static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4600{
4601 struct nfs_server *server = NFS_SERVER(inode);
4602 int ret;
4603
4604 if (!nfs4_server_supports_acls(server))
4605 return -EOPNOTSUPP;
4606 ret = nfs_revalidate_inode(server, inode);
4607 if (ret < 0)
4608 return ret;
08a22b39
AK		 4609 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4610 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4611 ret = nfs4_read_cached_acl(inode, buf, buflen);
4612 if (ret != -ENOENT)
bf118a34
AA		 4613 /* -ENOENT is returned if there is no ACL or if there is an ACL
4614 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4615 return ret;
4616 return nfs4_get_acl_uncached(inode, buf, buflen);
4617}
4618
16b4289c 4619static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4620{
4621 struct nfs_server *server = NFS_SERVER(inode);
4622 struct page *pages[NFS4ACL_MAXPAGES];
4623 struct nfs_setaclargs arg = {
4624 .fh = NFS_FH(inode),
4625 .acl_pages = pages,
4626 .acl_len = buflen,
4627 };
73c403a9 4628 struct nfs_setaclres res;
4b580ee3
BF		 4629 struct rpc_message msg = {
4630 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4631 .rpc_argp = &arg,
73c403a9 4632 .rpc_resp = &res,
4b580ee3 4633 };
21f498c2 4634 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4635 int ret, i;
4b580ee3
BF		 4636
4637 if (!nfs4_server_supports_acls(server))
4638 return -EOPNOTSUPP;
21f498c2
TM		 4639 if (npages > ARRAY_SIZE(pages))
4640 return -ERANGE;
e9e3d724
NH		 4641 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4642 if (i < 0)
4643 return i;
57ec14c5 4644 nfs4_inode_return_delegation(inode);
7c513058 4645 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4646
4647 /*
4648 * Free each page after tx, so the only ref left is
4649 * held by the network stack
4650 */
4651 for (; i > 0; i--)
4652 put_page(pages[i-1]);
4653
08a22b39
AK		 4654 /*
4655 * Acl update can result in inode attribute update.
4656 * so mark the attribute cache invalid.
4657 */
4658 spin_lock(&inode->i_lock);
4659 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4660 spin_unlock(&inode->i_lock);
f41f7418
TM		 4661 nfs_access_zap_cache(inode);
4662 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4663 return ret;
4664}
4665
16b4289c
TM		 4666static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4667{
4668 struct nfs4_exception exception = { };
4669 int err;
4670 do {
c1578b76
TM		 4671 err = __nfs4_proc_set_acl(inode, buf, buflen);
4672 trace_nfs4_set_acl(inode, err);
4673 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4674 &exception);
4675 } while (exception.retry);
4676 return err;
4677}
4678
aa9c2669
DQ		 4679#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4680static int _nfs4_get_security_label(struct inode *inode, void *buf,
4681 size_t buflen)
4682{
4683 struct nfs_server *server = NFS_SERVER(inode);
4684 struct nfs_fattr fattr;
4685 struct nfs4_label label = {0, 0, buflen, buf};
4686
4687 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4688 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4689 .fh = NFS_FH(inode),
4690 .bitmask = bitmask,
4691 };
4692 struct nfs4_getattr_res res = {
4693 .fattr = &fattr,
4694 .label = &label,
4695 .server = server,
4696 };
4697 struct rpc_message msg = {
4698 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4699 .rpc_argp = &arg,
aa9c2669
DQ		 4700 .rpc_resp = &res,
4701 };
4702 int ret;
4703
4704 nfs_fattr_init(&fattr);
4705
fcb63a9b 4706 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4707 if (ret)
4708 return ret;
4709 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4710 return -ENOENT;
4711 if (buflen < label.len)
4712 return -ERANGE;
4713 return 0;
4714}
4715
4716static int nfs4_get_security_label(struct inode *inode, void *buf,
4717 size_t buflen)
4718{
4719 struct nfs4_exception exception = { };
4720 int err;
4721
4722 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4723 return -EOPNOTSUPP;
4724
4725 do {
c1578b76
TM		 4726 err = _nfs4_get_security_label(inode, buf, buflen);
4727 trace_nfs4_get_security_label(inode, err);
4728 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4729 &exception);
4730 } while (exception.retry);
4731 return err;
4732}
4733
4734static int _nfs4_do_set_security_label(struct inode *inode,
4735 struct nfs4_label *ilabel,
4736 struct nfs_fattr *fattr,
4737 struct nfs4_label *olabel)
4738{
4739
4740 struct iattr sattr = {0};
4741 struct nfs_server *server = NFS_SERVER(inode);
4742 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4743 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4744 .fh = NFS_FH(inode),
4745 .iap = &sattr,
4746 .server = server,
4747 .bitmask = bitmask,
4748 .label = ilabel,
4749 };
4750 struct nfs_setattrres res = {
4751 .fattr = fattr,
4752 .label = olabel,
4753 .server = server,
4754 };
4755 struct rpc_message msg = {
4756 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4757 .rpc_argp = &arg,
aa9c2669
DQ		 4758 .rpc_resp = &res,
4759 };
4760 int status;
4761
12207f69 4762 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4763
12207f69 4764 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4765 if (status)
4766 dprintk("%s failed: %d\n", __func__, status);
4767
4768 return status;
4769}
4770
4771static int nfs4_do_set_security_label(struct inode *inode,
4772 struct nfs4_label *ilabel,
4773 struct nfs_fattr *fattr,
4774 struct nfs4_label *olabel)
4775{
4776 struct nfs4_exception exception = { };
4777 int err;
4778
4779 do {
c1578b76
TM		 4780 err = _nfs4_do_set_security_label(inode, ilabel,
4781 fattr, olabel);
4782 trace_nfs4_set_security_label(inode, err);
4783 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4784 &exception);
4785 } while (exception.retry);
4786 return err;
4787}
4788
4789static int
4790nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4791{
4792 struct nfs4_label ilabel, *olabel = NULL;
4793 struct nfs_fattr fattr;
4794 struct rpc_cred *cred;
4795 struct inode *inode = dentry->d_inode;
4796 int status;
4797
4798 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4799 return -EOPNOTSUPP;
4800
4801 nfs_fattr_init(&fattr);
4802
4803 ilabel.pi = 0;
4804 ilabel.lfs = 0;
4805 ilabel.label = (char *)buf;
4806 ilabel.len = buflen;
4807
4808 cred = rpc_lookup_cred();
4809 if (IS_ERR(cred))
4810 return PTR_ERR(cred);
4811
4812 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4813 if (IS_ERR(olabel)) {
4814 status = -PTR_ERR(olabel);
4815 goto out;
4816 }
4817
4818 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4819 if (status == 0)
4820 nfs_setsecurity(inode, &fattr, olabel);
4821
4822 nfs4_label_free(olabel);
4823out:
4824 put_rpccred(cred);
4825 return status;
4826}
4827#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4828
4829
1da177e4 4830static int
8478eaa1
N		 4831nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4832 struct nfs4_state *state, long *timeout)
1da177e4 4833{
aa5190d0
TM		 4834 struct nfs_client *clp = server->nfs_client;
4835
4836 if (task->tk_status >= 0)
1da177e4
LT		 4837 return 0;
4838 switch(task->tk_status) {
a1d0b5ee 4839 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4840 case -NFS4ERR_ADMIN_REVOKED:
4841 case -NFS4ERR_BAD_STATEID:
4842 case -NFS4ERR_OPENMODE:
4843 if (state == NULL)
4844 break;
5d422301 4845 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4846 goto recovery_failed;
0400a6b0 4847 goto wait_on_recovery;
0ced63d1 4848 case -NFS4ERR_EXPIRED:
5d422301
TM		 4849 if (state != NULL) {
4850 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4851 goto recovery_failed;
5d422301 4852 }
1da177e4 4853 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4854 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4855 nfs4_schedule_lease_recovery(clp);
4856 goto wait_on_recovery;
519ae255
CL		 4857 case -NFS4ERR_MOVED:
4858 if (nfs4_schedule_migration_recovery(server) < 0)
4859 goto recovery_failed;
4860 goto wait_on_recovery;
8ef2f8d4
CL		 4861 case -NFS4ERR_LEASE_MOVED:
4862 nfs4_schedule_lease_moved_recovery(clp);
4863 goto wait_on_recovery;
4745e315
AA		 4864#if defined(CONFIG_NFS_V4_1)
4865 case -NFS4ERR_BADSESSION:
4866 case -NFS4ERR_BADSLOT:
4867 case -NFS4ERR_BAD_HIGH_SLOT:
4868 case -NFS4ERR_DEADSESSION:
4869 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4870 case -NFS4ERR_SEQ_FALSE_RETRY:
4871 case -NFS4ERR_SEQ_MISORDERED:
4872 dprintk("%s ERROR %d, Reset session\n", __func__,
4873 task->tk_status);
9f594791 4874 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4875 goto wait_on_recovery;
4745e315 4876#endif /* CONFIG_NFS_V4_1 */
1da177e4 4877 case -NFS4ERR_DELAY:
aa5190d0 4878 nfs_inc_server_stats(server, NFSIOS_DELAY);
8478eaa1
N		 4879 rpc_delay(task, nfs4_update_delay(timeout));
4880 goto restart_call;
006ea73e 4881 case -NFS4ERR_GRACE:
1da177e4 4882 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4883 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4884 case -NFS4ERR_OLD_STATEID:
f1478c13 4885 goto restart_call;
1da177e4
LT		 4886 }
4887 task->tk_status = nfs4_map_errors(task->tk_status);
4888 return 0;
9f51a78e 4889recovery_failed:
5d422301
TM		 4890 task->tk_status = -EIO;
4891 return 0;
0400a6b0 4892wait_on_recovery:
a2c0b9e2 4893 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4894 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4895 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4896 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4897 goto recovery_failed;
f1478c13 4898restart_call:
a2c0b9e2
TM		 4899 task->tk_status = 0;
4900 return -EAGAIN;
1da177e4
LT		 4901}
4902
f092075d
CL		 4903static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4904 nfs4_verifier *bootverf)
cd93710e
CL		 4905{
4906 __be32 verf[2];
4907
2c820d9a
CL		 4908 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4909 /* An impossible timestamp guarantees this value
4910 * will never match a generated boot time. */
4911 verf[0] = 0;
17f26b12 4912 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4913 } else {
f092075d 4914 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4915 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4916 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4917 }
cd93710e
CL		 4918 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4919}
4920
e984a55a
CL		 4921static unsigned int
4922nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4923 char *buf, size_t len)
4924{
4925 unsigned int result;
4926
4927 rcu_read_lock();
4928 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4929 clp->cl_ipaddr,
4930 rpc_peeraddr2str(clp->cl_rpcclient,
4931 RPC_DISPLAY_ADDR),
4932 rpc_peeraddr2str(clp->cl_rpcclient,
4933 RPC_DISPLAY_PROTO));
4934 rcu_read_unlock();
4935 return result;
4936}
4937
4938static unsigned int
4939nfs4_init_uniform_client_string(const struct nfs_client *clp,
4940 char *buf, size_t len)
4941{
55b59293 4942 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4943
4944 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4945 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4946 clp->rpc_ops->version,
4947 clp->cl_minorversion,
4948 nfs4_client_id_uniquifier,
4949 nodename);
e984a55a
CL		 4950 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4951 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4952 nodename);
e984a55a
CL		 4953}
4954
706cb8db
CL		 4955/*
4956 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
4957 * services. Advertise one based on the address family of the
4958 * clientaddr.
4959 */
4960static unsigned int
4961nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
4962{
4963 if (strchr(clp->cl_ipaddr, ':') != NULL)
4964 return scnprintf(buf, len, "tcp6");
4965 else
4966 return scnprintf(buf, len, "tcp");
4967}
4968
f11b2a1c
JL		 4969static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
4970{
4971 struct nfs4_setclientid *sc = calldata;
4972
4973 if (task->tk_status == 0)
4974 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
4975}
4976
4977static const struct rpc_call_ops nfs4_setclientid_ops = {
4978 .rpc_call_done = nfs4_setclientid_done,
4979};
4980
6bbb4ae8
CL		 4981/**
4982 * nfs4_proc_setclientid - Negotiate client ID
4983 * @clp: state data structure
4984 * @program: RPC program for NFSv4 callback service
4985 * @port: IP port number for NFS4 callback service
4986 * @cred: RPC credential to use for this call
4987 * @res: where to place the result
4988 *
4989 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4990 */
bb8b27e5
TM		 4991int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4992 unsigned short port, struct rpc_cred *cred,
4993 struct nfs4_setclientid_res *res)
1da177e4
LT		 4994{
4995 nfs4_verifier sc_verifier;
4996 struct nfs4_setclientid setclientid = {
4997 .sc_verifier = &sc_verifier,
4998 .sc_prog = program,
f4eecd5d 4999 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 5000 };
5001 struct rpc_message msg = {
5002 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5003 .rpc_argp = &setclientid,
bb8b27e5 5004 .rpc_resp = res,
286d7d6a 5005 .rpc_cred = cred,
1da177e4 5006 };
f11b2a1c
JL		 5007 struct rpc_task *task;
5008 struct rpc_task_setup task_setup_data = {
5009 .rpc_client = clp->cl_rpcclient,
5010 .rpc_message = &msg,
5011 .callback_ops = &nfs4_setclientid_ops,
5012 .callback_data = &setclientid,
5013 .flags = RPC_TASK_TIMEOUT,
5014 };
6bbb4ae8 5015 int status;
1da177e4 5016
de734831 5017 /* nfs_client_id4 */
f092075d 5018 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 5019 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5020 setclientid.sc_name_len =
5021 nfs4_init_uniform_client_string(clp,
5022 setclientid.sc_name,
5023 sizeof(setclientid.sc_name));
5024 else
5025 setclientid.sc_name_len =
5026 nfs4_init_nonuniform_client_string(clp,
5027 setclientid.sc_name,
5028 sizeof(setclientid.sc_name));
de734831 5029 /* cb_client4 */
706cb8db
CL		 5030 setclientid.sc_netid_len =
5031 nfs4_init_callback_netid(clp,
5032 setclientid.sc_netid,
5033 sizeof(setclientid.sc_netid));
de734831 5034 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5035 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5036 clp->cl_ipaddr, port >> 8, port & 255);
5037
6bbb4ae8
CL		 5038 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
5039 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5040 setclientid.sc_name_len, setclientid.sc_name);
f11b2a1c
JL		 5041 task = rpc_run_task(&task_setup_data);
5042 if (IS_ERR(task)) {
5043 status = PTR_ERR(task);
5044 goto out;
5045 }
5046 status = task->tk_status;
5047 if (setclientid.sc_cred) {
5048 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5049 put_rpccred(setclientid.sc_cred);
5050 }
5051 rpc_put_task(task);
5052out:
c6d01c6f 5053 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5054 dprintk("NFS reply setclientid: %d\n", status);
5055 return status;
1da177e4
LT		 5056}
5057
6bbb4ae8
CL		 5058/**
5059 * nfs4_proc_setclientid_confirm - Confirm client ID
5060 * @clp: state data structure
5061 * @res: result of a previous SETCLIENTID
5062 * @cred: RPC credential to use for this call
5063 *
5064 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5065 */
fd954ae1 5066int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5067 struct nfs4_setclientid_res *arg,
5068 struct rpc_cred *cred)
1da177e4 5069{
1da177e4
LT		 5070 struct rpc_message msg = {
5071 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5072 .rpc_argp = arg,
286d7d6a 5073 .rpc_cred = cred,
1da177e4 5074 };
1da177e4
LT		 5075 int status;
5076
6bbb4ae8
CL		 5077 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5078 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5079 clp->cl_clientid);
1bd714f2 5080 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5081 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5082 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5083 return status;
5084}
5085
fe650407
TM		 5086struct nfs4_delegreturndata {
5087 struct nfs4_delegreturnargs args;
fa178f29 5088 struct nfs4_delegreturnres res;
fe650407
TM		 5089 struct nfs_fh fh;
5090 nfs4_stateid stateid;
26e976a8 5091 unsigned long timestamp;
fa178f29 5092 struct nfs_fattr fattr;
fe650407 5093 int rpc_status;
039b756a
PT		 5094 struct inode *inode;
5095 bool roc;
5096 u32 roc_barrier;
fe650407
TM		 5097};
5098
fe650407
TM		 5099static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5100{
5101 struct nfs4_delegreturndata *data = calldata;
938e1010 5102
14516c3a
TM		 5103 if (!nfs4_sequence_done(task, &data->res.seq_res))
5104 return;
938e1010 5105
ca8acf8d 5106 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5107 switch (task->tk_status) {
79708861 5108 case 0:
fa178f29 5109 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5110 case -NFS4ERR_ADMIN_REVOKED:
5111 case -NFS4ERR_DELEG_REVOKED:
5112 case -NFS4ERR_BAD_STATEID:
5113 case -NFS4ERR_OLD_STATEID:
5114 case -NFS4ERR_STALE_STATEID:
5115 case -NFS4ERR_EXPIRED:
5116 task->tk_status = 0;
039b756a
PT		 5117 if (data->roc)
5118 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5119 break;
79708861 5120 default:
8478eaa1
N		 5121 if (nfs4_async_handle_error(task, data->res.server,
5122 NULL, NULL) == -EAGAIN) {
d00c5d43 5123 rpc_restart_call_prepare(task);
79708861
RL		 5124 return;
5125 }
5126 }
5127 data->rpc_status = task->tk_status;
fe650407
TM		 5128}
5129
5130static void nfs4_delegreturn_release(void *calldata)
5131{
039b756a
PT		 5132 struct nfs4_delegreturndata *data = calldata;
5133
5134 if (data->roc)
5135 pnfs_roc_release(data->inode);
fe650407
TM		 5136 kfree(calldata);
5137}
5138
938e1010
AA		 5139static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5140{
5141 struct nfs4_delegreturndata *d_data;
5142
5143 d_data = (struct nfs4_delegreturndata *)data;
5144
039b756a
PT		 5145 if (d_data->roc &&
5146 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5147 return;
5148
d9afbd1b
TM		 5149 nfs4_setup_sequence(d_data->res.server,
5150 &d_data->args.seq_args,
5151 &d_data->res.seq_res,
5152 task);
938e1010 5153}
938e1010 5154
c8d149f3 5155static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5156 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5157 .rpc_call_done = nfs4_delegreturn_done,
5158 .rpc_release = nfs4_delegreturn_release,
5159};
5160
e6f81075 5161static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5162{
5163 struct nfs4_delegreturndata *data;
fa178f29 5164 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5165 struct rpc_task *task;
5138fde0
TM		 5166 struct rpc_message msg = {
5167 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5168 .rpc_cred = cred,
5169 };
c970aa85
TM		 5170 struct rpc_task_setup task_setup_data = {
5171 .rpc_client = server->client,
5138fde0 5172 .rpc_message = &msg,
c970aa85
TM		 5173 .callback_ops = &nfs4_delegreturn_ops,
5174 .flags = RPC_TASK_ASYNC,
5175 };
e6f81075 5176 int status = 0;
fe650407 5177
8535b2be 5178 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5179 if (data == NULL)
5180 return -ENOMEM;
a9c92d6b 5181 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5182 data->args.fhandle = &data->fh;
5183 data->args.stateid = &data->stateid;
9e907fec 5184 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5185 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5186 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5187 data->res.fattr = &data->fattr;
5188 data->res.server = server;
5138fde0 5189 nfs_fattr_init(data->res.fattr);
26e976a8 5190 data->timestamp = jiffies;
fe650407 5191 data->rpc_status = 0;
039b756a
PT		 5192 data->inode = inode;
5193 data->roc = list_empty(&NFS_I(inode)->open_files) ?
5194 pnfs_roc(inode) : false;
fe650407 5195
c970aa85 5196 task_setup_data.callback_data = data;
1174dd1f
TM		 5197 msg.rpc_argp = &data->args;
5198 msg.rpc_resp = &data->res;
c970aa85 5199 task = rpc_run_task(&task_setup_data);
7a1218a2 5200 if (IS_ERR(task))
fe650407 5201 return PTR_ERR(task);
e6f81075
TM		 5202 if (!issync)
5203 goto out;
fe650407 5204 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5205 if (status != 0)
5206 goto out;
5207 status = data->rpc_status;
e144cbcc
TM		 5208 if (status == 0)
5209 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5210 else
5211 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5212out:
e6b3c4db 5213 rpc_put_task(task);
fe650407 5214 return status;
1da177e4
LT		 5215}
5216
e6f81075 5217int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5218{
5219 struct nfs_server *server = NFS_SERVER(inode);
5220 struct nfs4_exception exception = { };
5221 int err;
5222 do {
e6f81075 5223 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5224 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5225 switch (err) {
5226 case -NFS4ERR_STALE_STATEID:
5227 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5228 case 0:
5229 return 0;
5230 }
5231 err = nfs4_handle_exception(server, err, &exception);
5232 } while (exception.retry);
5233 return err;
5234}
5235
5236#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5237#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5238
5239/*
5240 * sleep, with exponential backoff, and retry the LOCK operation.
5241 */
5242static unsigned long
5243nfs4_set_lock_task_retry(unsigned long timeout)
5244{
416ad3c9 5245 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5246 timeout <<= 1;
5247 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5248 return NFS4_LOCK_MAXTIMEOUT;
5249 return timeout;
5250}
5251
1da177e4
LT		 5252static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5253{
5254 struct inode *inode = state->inode;
5255 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5256 struct nfs_client *clp = server->nfs_client;
911d1aaf 5257 struct nfs_lockt_args arg = {
1da177e4 5258 .fh = NFS_FH(inode),
911d1aaf 5259 .fl = request,
1da177e4 5260 };
911d1aaf
TM		 5261 struct nfs_lockt_res res = {
5262 .denied = request,
1da177e4
LT		 5263 };
5264 struct rpc_message msg = {
5265 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5266 .rpc_argp = &arg,
5267 .rpc_resp = &res,
5268 .rpc_cred = state->owner->so_cred,
5269 };
1da177e4
LT		 5270 struct nfs4_lock_state *lsp;
5271 int status;
5272
911d1aaf 5273 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5274 status = nfs4_set_lock_state(state, request);
5275 if (status != 0)
5276 goto out;
5277 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5278 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5279 arg.lock_owner.s_dev = server->s_dev;
7c513058 5280 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5281 switch (status) {
5282 case 0:
5283 request->fl_type = F_UNLCK;
5284 break;
5285 case -NFS4ERR_DENIED:
5286 status = 0;
1da177e4 5287 }
70cc6487 5288 request->fl_ops->fl_release_private(request);
a6f951dd 5289 request->fl_ops = NULL;
8d0a8a9d 5290out:
1da177e4
LT		 5291 return status;
5292}
5293
5294static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5295{
5296 struct nfs4_exception exception = { };
5297 int err;
5298
5299 do {
d1b748a5
TM		 5300 err = _nfs4_proc_getlk(state, cmd, request);
5301 trace_nfs4_get_lock(request, state, cmd, err);
5302 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5303 &exception);
5304 } while (exception.retry);
5305 return err;
5306}
5307
5308static int do_vfs_lock(struct file *file, struct file_lock *fl)
5309{
5310 int res = 0;
5311 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5312 case FL_POSIX:
5313 res = posix_lock_file_wait(file, fl);
5314 break;
5315 case FL_FLOCK:
5316 res = flock_lock_file_wait(file, fl);
5317 break;
5318 default:
5319 BUG();
5320 }
1da177e4
LT		 5321 return res;
5322}
5323
faf5f49c 5324struct nfs4_unlockdata {
911d1aaf
TM		 5325 struct nfs_locku_args arg;
5326 struct nfs_locku_res res;
faf5f49c
TM		 5327 struct nfs4_lock_state *lsp;
5328 struct nfs_open_context *ctx;
911d1aaf
TM		 5329 struct file_lock fl;
5330 const struct nfs_server *server;
26e976a8 5331 unsigned long timestamp;
faf5f49c
TM		 5332};
5333
911d1aaf
TM		 5334static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5335 struct nfs_open_context *ctx,
5336 struct nfs4_lock_state *lsp,
5337 struct nfs_seqid *seqid)
5338{
5339 struct nfs4_unlockdata *p;
5340 struct inode *inode = lsp->ls_state->inode;
5341
8535b2be 5342 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5343 if (p == NULL)
5344 return NULL;
5345 p->arg.fh = NFS_FH(inode);
5346 p->arg.fl = &p->fl;
5347 p->arg.seqid = seqid;
c1d51931 5348 p->res.seqid = seqid;
911d1aaf
TM		 5349 p->arg.stateid = &lsp->ls_stateid;
5350 p->lsp = lsp;
5351 atomic_inc(&lsp->ls_count);
5352 /* Ensure we don't close file until we're done freeing locks! */
5353 p->ctx = get_nfs_open_context(ctx);
5354 memcpy(&p->fl, fl, sizeof(p->fl));
5355 p->server = NFS_SERVER(inode);
5356 return p;
5357}
5358
06f814a3 5359static void nfs4_locku_release_calldata(void *data)
faf5f49c 5360{
963d8fe5 5361 struct nfs4_unlockdata *calldata = data;
911d1aaf 5362 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5363 nfs4_put_lock_state(calldata->lsp);
5364 put_nfs_open_context(calldata->ctx);
5365 kfree(calldata);
faf5f49c
TM		 5366}
5367
963d8fe5 5368static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5369{
963d8fe5 5370 struct nfs4_unlockdata *calldata = data;
faf5f49c 5371
14516c3a
TM		 5372 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5373 return;
faf5f49c
TM		 5374 switch (task->tk_status) {
5375 case 0:
f597c537
TM		 5376 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5377 &calldata->res.stateid);
26e976a8 5378 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5379 break;
9e33bed5
TM		 5380 case -NFS4ERR_BAD_STATEID:
5381 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5382 case -NFS4ERR_STALE_STATEID:
5383 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5384 break;
5385 default:
8478eaa1
N		 5386 if (nfs4_async_handle_error(task, calldata->server,
5387 NULL, NULL) == -EAGAIN)
d00c5d43 5388 rpc_restart_call_prepare(task);
faf5f49c 5389 }
2b1bc308 5390 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5391}
5392
4ce70ada 5393static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5394{
4ce70ada 5395 struct nfs4_unlockdata *calldata = data;
faf5f49c 5396
911d1aaf 5397 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5398 goto out_wait;
795a88c9 5399 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5400 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5401 goto out_no_action;
faf5f49c 5402 }
26e976a8 5403 calldata->timestamp = jiffies;
035168ab 5404 if (nfs4_setup_sequence(calldata->server,
a893693c 5405 &calldata->arg.seq_args,
2240a9e2
TM		 5406 &calldata->res.seq_res,
5407 task) != 0)
5408 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5409 return;
5410out_no_action:
5411 task->tk_action = NULL;
5412out_wait:
5413 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5414}
5415
963d8fe5 5416static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5417 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5418 .rpc_call_done = nfs4_locku_done,
06f814a3 5419 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5420};
5421
a5d16a4d
TM		 5422static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5423 struct nfs_open_context *ctx,
5424 struct nfs4_lock_state *lsp,
5425 struct nfs_seqid *seqid)
5426{
5427 struct nfs4_unlockdata *data;
5138fde0
TM		 5428 struct rpc_message msg = {
5429 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5430 .rpc_cred = ctx->cred,
5431 };
c970aa85
TM		 5432 struct rpc_task_setup task_setup_data = {
5433 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5434 .rpc_message = &msg,
c970aa85 5435 .callback_ops = &nfs4_locku_ops,
101070ca 5436 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5437 .flags = RPC_TASK_ASYNC,
5438 };
a5d16a4d 5439
fa940720
WAA		 5440 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5441 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5442
137d6aca
FF		 5443 /* Ensure this is an unlock - when canceling a lock, the
5444 * canceled lock is passed in, and it won't be an unlock.
5445 */
5446 fl->fl_type = F_UNLCK;
5447
a5d16a4d
TM		 5448 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5449 if (data == NULL) {
5450 nfs_free_seqid(seqid);
5451 return ERR_PTR(-ENOMEM);
5452 }
5453
a9c92d6b 5454 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5455 msg.rpc_argp = &data->arg;
5456 msg.rpc_resp = &data->res;
c970aa85
TM		 5457 task_setup_data.callback_data = data;
5458 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5459}
5460
faf5f49c
TM		 5461static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5462{
65b62a29
TM		 5463 struct inode *inode = state->inode;
5464 struct nfs4_state_owner *sp = state->owner;
5465 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5466 struct nfs_seqid *seqid;
1da177e4 5467 struct nfs4_lock_state *lsp;
06f814a3
TM		 5468 struct rpc_task *task;
5469 int status = 0;
536ff0f8 5470 unsigned char fl_flags = request->fl_flags;
faf5f49c 5471
8d0a8a9d 5472 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5473 /* Unlock _before_ we do the RPC call */
5474 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5475 /* Exclude nfs_delegation_claim_locks() */
5476 mutex_lock(&sp->so_delegreturn_mutex);
5477 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5478 down_read(&nfsi->rwsem);
5479 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5480 up_read(&nfsi->rwsem);
65b62a29 5481 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5482 goto out;
19e03c57
TM		 5483 }
5484 up_read(&nfsi->rwsem);
65b62a29 5485 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5486 if (status != 0)
9b073574
TM		 5487 goto out;
5488 /* Is this a delegated lock? */
8d0a8a9d 5489 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5490 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5491 goto out;
8535b2be 5492 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5493 status = -ENOMEM;
911d1aaf 5494 if (seqid == NULL)
9b073574 5495 goto out;
cd3758e3 5496 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5497 status = PTR_ERR(task);
5498 if (IS_ERR(task))
9b073574 5499 goto out;
a5d16a4d 5500 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5501 rpc_put_task(task);
9b073574 5502out:
536ff0f8 5503 request->fl_flags = fl_flags;
d1b748a5 5504 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5505 return status;
5506}
5507
a5d16a4d
TM		 5508struct nfs4_lockdata {
5509 struct nfs_lock_args arg;
5510 struct nfs_lock_res res;
5511 struct nfs4_lock_state *lsp;
5512 struct nfs_open_context *ctx;
5513 struct file_lock fl;
26e976a8 5514 unsigned long timestamp;
a5d16a4d
TM		 5515 int rpc_status;
5516 int cancelled;
66179efe 5517 struct nfs_server *server;
a5d16a4d
TM		 5518};
5519
5520static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5521 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5522 gfp_t gfp_mask)
1da177e4 5523{
a5d16a4d
TM		 5524 struct nfs4_lockdata *p;
5525 struct inode *inode = lsp->ls_state->inode;
1da177e4 5526 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5527
8535b2be 5528 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5529 if (p == NULL)
5530 return NULL;
5531
5532 p->arg.fh = NFS_FH(inode);
5533 p->arg.fl = &p->fl;
8535b2be 5534 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5535 if (p->arg.open_seqid == NULL)
5536 goto out_free;
8535b2be 5537 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5538 if (p->arg.lock_seqid == NULL)
2f74c0a0 5539 goto out_free_seqid;
a5d16a4d 5540 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5541 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5542 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5543 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5544 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5545 p->lsp = lsp;
66179efe 5546 p->server = server;
a5d16a4d
TM		 5547 atomic_inc(&lsp->ls_count);
5548 p->ctx = get_nfs_open_context(ctx);
5549 memcpy(&p->fl, fl, sizeof(p->fl));
5550 return p;
2f74c0a0
TM		 5551out_free_seqid:
5552 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5553out_free:
5554 kfree(p);
5555 return NULL;
5556}
5557
5558static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5559{
5560 struct nfs4_lockdata *data = calldata;
5561 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5562
3110ff80 5563 dprintk("%s: begin!\n", __func__);
2f74c0a0 5564 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5565 goto out_wait;
a5d16a4d
TM		 5566 /* Do we need to do an open_to_lock_owner? */
5567 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5568 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5569 goto out_release_lock_seqid;
8fe72bac 5570 }
8e472f33 5571 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5572 data->arg.new_lock_owner = 1;
c1d51931 5573 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5574 } else
5575 data->arg.new_lock_owner = 0;
5d422301
TM		 5576 if (!nfs4_valid_open_stateid(state)) {
5577 data->rpc_status = -EBADF;
5578 task->tk_action = NULL;
5579 goto out_release_open_seqid;
5580 }
26e976a8 5581 data->timestamp = jiffies;
035168ab
TM		 5582 if (nfs4_setup_sequence(data->server,
5583 &data->arg.seq_args,
2240a9e2 5584 &data->res.seq_res,
d9afbd1b 5585 task) == 0)
66179efe 5586 return;
5d422301 5587out_release_open_seqid:
2240a9e2
TM		 5588 nfs_release_seqid(data->arg.open_seqid);
5589out_release_lock_seqid:
5590 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5591out_wait:
5592 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5593 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5594}
5595
a5d16a4d
TM		 5596static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5597{
5598 struct nfs4_lockdata *data = calldata;
5599
3110ff80 5600 dprintk("%s: begin!\n", __func__);
a5d16a4d 5601
14516c3a
TM		 5602 if (!nfs4_sequence_done(task, &data->res.seq_res))
5603 return;
66179efe 5604
a5d16a4d 5605 data->rpc_status = task->tk_status;
a5d16a4d 5606 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5607 if (data->rpc_status == 0)
5608 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5609 else
5610 goto out;
5611 }
5612 if (data->rpc_status == 0) {
f597c537 5613 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5614 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5615 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5616 }
a5d16a4d 5617out:
3110ff80 5618 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5619}
5620
5621static void nfs4_lock_release(void *calldata)
5622{
5623 struct nfs4_lockdata *data = calldata;
5624
3110ff80 5625 dprintk("%s: begin!\n", __func__);
2f74c0a0 5626 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5627 if (data->cancelled != 0) {
5628 struct rpc_task *task;
5629 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5630 data->arg.lock_seqid);
5631 if (!IS_ERR(task))
bf294b41 5632 rpc_put_task_async(task);
3110ff80 5633 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5634 } else
5635 nfs_free_seqid(data->arg.lock_seqid);
5636 nfs4_put_lock_state(data->lsp);
5637 put_nfs_open_context(data->ctx);
5638 kfree(data);
3110ff80 5639 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5640}
5641
5642static const struct rpc_call_ops nfs4_lock_ops = {
5643 .rpc_call_prepare = nfs4_lock_prepare,
5644 .rpc_call_done = nfs4_lock_done,
5645 .rpc_release = nfs4_lock_release,
5646};
5647
2bee72a6
TM		 5648static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5649{
2bee72a6
TM		 5650 switch (error) {
5651 case -NFS4ERR_ADMIN_REVOKED:
5652 case -NFS4ERR_BAD_STATEID:
ecac799a 5653 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5654 if (new_lock_owner != 0 ||
795a88c9 5655 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5656 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5657 break;
5658 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5659 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5660 case -NFS4ERR_EXPIRED:
5661 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5662 };
5663}
5664
afe6c27c 5665static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5666{
5667 struct nfs4_lockdata *data;
5668 struct rpc_task *task;
5138fde0
TM		 5669 struct rpc_message msg = {
5670 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5671 .rpc_cred = state->owner->so_cred,
5672 };
c970aa85
TM		 5673 struct rpc_task_setup task_setup_data = {
5674 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5675 .rpc_message = &msg,
c970aa85 5676 .callback_ops = &nfs4_lock_ops,
101070ca 5677 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5678 .flags = RPC_TASK_ASYNC,
5679 };
a5d16a4d
TM		 5680 int ret;
5681
3110ff80 5682 dprintk("%s: begin!\n", __func__);
cd3758e3 5683 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5684 fl->fl_u.nfs4_fl.owner,
5685 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5686 if (data == NULL)
5687 return -ENOMEM;
5688 if (IS_SETLKW(cmd))
5689 data->arg.block = 1;
a9c92d6b 5690 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5691 msg.rpc_argp = &data->arg;
5692 msg.rpc_resp = &data->res;
c970aa85 5693 task_setup_data.callback_data = data;
8fe72bac
TM		 5694 if (recovery_type > NFS_LOCK_NEW) {
5695 if (recovery_type == NFS_LOCK_RECLAIM)
5696 data->arg.reclaim = NFS_LOCK_RECLAIM;
5697 nfs4_set_sequence_privileged(&data->arg.seq_args);
5698 }
c970aa85 5699 task = rpc_run_task(&task_setup_data);
7a1218a2 5700 if (IS_ERR(task))
a5d16a4d 5701 return PTR_ERR(task);
a5d16a4d
TM		 5702 ret = nfs4_wait_for_completion_rpc_task(task);
5703 if (ret == 0) {
5704 ret = data->rpc_status;
2bee72a6
TM		 5705 if (ret)
5706 nfs4_handle_setlk_error(data->server, data->lsp,
5707 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5708 } else
5709 data->cancelled = 1;
e6b3c4db 5710 rpc_put_task(task);
3110ff80 5711 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5712 return ret;
1da177e4
LT		 5713}
5714
5715static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5716{
202b50dc 5717 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5718 struct nfs4_exception exception = {
5719 .inode = state->inode,
5720 };
202b50dc
TM		 5721 int err;
5722
5723 do {
42a2d13e
TM		 5724 /* Cache the lock if possible... */
5725 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5726 return 0;
afe6c27c 5727 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5728 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5729 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5730 break;
5731 nfs4_handle_exception(server, err, &exception);
5732 } while (exception.retry);
5733 return err;
1da177e4
LT		 5734}
5735
5736static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5737{
202b50dc 5738 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5739 struct nfs4_exception exception = {
5740 .inode = state->inode,
5741 };
202b50dc
TM		 5742 int err;
5743
6bfc93ef
TM		 5744 err = nfs4_set_lock_state(state, request);
5745 if (err != 0)
5746 return err;
f6de7a39 5747 if (!recover_lost_locks) {
ef1820f9
N		 5748 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5749 return 0;
5750 }
202b50dc 5751 do {
42a2d13e
TM		 5752 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5753 return 0;
afe6c27c 5754 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5755 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5756 switch (err) {
5757 default:
5758 goto out;
5759 case -NFS4ERR_GRACE:
5760 case -NFS4ERR_DELAY:
5761 nfs4_handle_exception(server, err, &exception);
5762 err = 0;
5763 }
202b50dc 5764 } while (exception.retry);
a9ed2e25 5765out:
202b50dc 5766 return err;
1da177e4
LT		 5767}
5768
f062eb6c 5769#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5770/**
5771 * nfs41_check_expired_locks - possibly free a lock stateid
5772 *
5773 * @state: NFSv4 state for an inode
5774 *
5775 * Returns NFS_OK if recovery for this stateid is now finished.
5776 * Otherwise a negative NFS4ERR value is returned.
5777 */
b01dd1d8 5778static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5779{
eb64cf96 5780 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5781 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5782 struct nfs_server *server = NFS_SERVER(state->inode);
5783
b01dd1d8 5784 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5785 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5786 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5787
5788 status = nfs41_test_stateid(server,
5789 &lsp->ls_stateid,
5790 cred);
08cb47fa 5791 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5792 if (status != NFS_OK) {
3e60ffdd
CL		 5793 /* Free the stateid unless the server
5794 * informs us the stateid is unrecognized. */
89af2739
CL		 5795 if (status != -NFS4ERR_BAD_STATEID)
5796 nfs41_free_stateid(server,
ab7cb0df
TM		 5797 &lsp->ls_stateid,
5798 cred);
795a88c9 5799 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5800 ret = status;
5801 }
5802 }
5803 };
5804
5805 return ret;
5806}
5807
5808static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5809{
5810 int status = NFS_OK;
5811
5812 if (test_bit(LK_STATE_IN_USE, &state->flags))
5813 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5814 if (status != NFS_OK)
5815 status = nfs4_lock_expired(state, request);
5816 return status;
f062eb6c
BS		 5817}
5818#endif
5819
1da177e4
LT		 5820static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5821{
9a99af49 5822 struct nfs4_state_owner *sp = state->owner;
19e03c57 5823 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5824 unsigned char fl_flags = request->fl_flags;
9a99af49 5825 unsigned int seq;
8e469ebd 5826 int status = -ENOLCK;
1da177e4 5827
8e469ebd
TM		 5828 if ((fl_flags & FL_POSIX) &&
5829 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5830 goto out;
6bfc93ef 5831 /* Is this a delegated open? */
6bfc93ef
TM		 5832 status = nfs4_set_lock_state(state, request);
5833 if (status != 0)
5834 goto out;
01c3b861
TM		 5835 request->fl_flags |= FL_ACCESS;
5836 status = do_vfs_lock(request->fl_file, request);
5837 if (status < 0)
5838 goto out;
19e03c57 5839 down_read(&nfsi->rwsem);
01c3b861 5840 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5841 /* Yes: cache locks! */
01c3b861 5842 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5843 request->fl_flags = fl_flags & ~FL_SLEEP;
5844 status = do_vfs_lock(request->fl_file, request);
5845 goto out_unlock;
01c3b861 5846 }
9a99af49
TM		 5847 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5848 up_read(&nfsi->rwsem);
afe6c27c 5849 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5850 if (status != 0)
9a99af49
TM		 5851 goto out;
5852 down_read(&nfsi->rwsem);
5853 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5854 status = -NFS4ERR_DELAY;
01c3b861 5855 goto out_unlock;
9a99af49 5856 }
6bfc93ef 5857 /* Note: we always want to sleep here! */
01c3b861 5858 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5859 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5860 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5861 "manager!\n", __func__);
01c3b861 5862out_unlock:
19e03c57 5863 up_read(&nfsi->rwsem);
01c3b861
TM		 5864out:
5865 request->fl_flags = fl_flags;
1da177e4
LT		 5866 return status;
5867}
5868
5869static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5870{
a1d0b5ee
TM		 5871 struct nfs4_exception exception = {
5872 .state = state,
05ffe24f 5873 .inode = state->inode,
a1d0b5ee 5874 };
1da177e4
LT		 5875 int err;
5876
5877 do {
965b5d67 5878 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5879 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5880 if (err == -NFS4ERR_DENIED)
5881 err = -EAGAIN;
1da177e4 5882 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5883 err, &exception);
1da177e4
LT		 5884 } while (exception.retry);
5885 return err;
5886}
5887
5888static int
5889nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5890{
5891 struct nfs_open_context *ctx;
5892 struct nfs4_state *state;
5893 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5894 int status;
5895
5896 /* verify open state */
cd3758e3 5897 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5898 state = ctx->state;
5899
5900 if (request->fl_start < 0 || request->fl_end < 0)
5901 return -EINVAL;
5902
d953126a
TM		 5903 if (IS_GETLK(cmd)) {
5904 if (state != NULL)
5905 return nfs4_proc_getlk(state, F_GETLK, request);
5906 return 0;
5907 }
1da177e4
LT		 5908
5909 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5910 return -EINVAL;
5911
d953126a
TM		 5912 if (request->fl_type == F_UNLCK) {
5913 if (state != NULL)
5914 return nfs4_proc_unlck(state, cmd, request);
5915 return 0;
5916 }
1da177e4 5917
d953126a
TM		 5918 if (state == NULL)
5919 return -ENOLCK;
55725513
TM		 5920 /*
5921 * Don't rely on the VFS having checked the file open mode,
5922 * since it won't do this for flock() locks.
5923 */
f44106e2 5924 switch (request->fl_type) {
55725513
TM		 5925 case F_RDLCK:
5926 if (!(filp->f_mode & FMODE_READ))
5927 return -EBADF;
5928 break;
5929 case F_WRLCK:
5930 if (!(filp->f_mode & FMODE_WRITE))
5931 return -EBADF;
5932 }
5933
1da177e4
LT		 5934 do {
5935 status = nfs4_proc_setlk(state, cmd, request);
5936 if ((status != -EAGAIN) || IS_SETLK(cmd))
5937 break;
5938 timeout = nfs4_set_lock_task_retry(timeout);
5939 status = -ERESTARTSYS;
5940 if (signalled())
5941 break;
5942 } while(status < 0);
1da177e4
LT		 5943 return status;
5944}
5945
db4f2e63 5946int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5947{
5948 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5949 int err;
5950
5951 err = nfs4_set_lock_state(state, fl);
5952 if (err != 0)
db4f2e63 5953 return err;
4a706fa0 5954 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5955 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5956}
6b3b5496 5957
cf470c3e
TM		 5958struct nfs_release_lockowner_data {
5959 struct nfs4_lock_state *lsp;
5ae67c4f 5960 struct nfs_server *server;
cf470c3e 5961 struct nfs_release_lockowner_args args;
b7e63a10 5962 struct nfs_release_lockowner_res res;
60ea6812 5963 unsigned long timestamp;
cf470c3e
TM		 5964};
5965
fbd4bfd1
CL		 5966static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5967{
5968 struct nfs_release_lockowner_data *data = calldata;
5b53dc88
KM		 5969 struct nfs_server *server = data->server;
5970 nfs40_setup_sequence(server, &data->args.seq_args,
5971 &data->res.seq_res, task);
5972 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 5973 data->timestamp = jiffies;
fbd4bfd1
CL		 5974}
5975
5976static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5977{
5978 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 5979 struct nfs_server *server = data->server;
5980
b7e63a10 5981 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 5982
5983 switch (task->tk_status) {
5984 case 0:
5985 renew_lease(server, data->timestamp);
5986 break;
5987 case -NFS4ERR_STALE_CLIENTID:
5988 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 5989 nfs4_schedule_lease_recovery(server->nfs_client);
5990 break;
60ea6812
CL		 5991 case -NFS4ERR_LEASE_MOVED:
5992 case -NFS4ERR_DELAY:
8478eaa1
N		 5993 if (nfs4_async_handle_error(task, server,
5994 NULL, NULL) == -EAGAIN)
60ea6812
CL		 5995 rpc_restart_call_prepare(task);
5996 }
fbd4bfd1
CL		 5997}
5998
d3c7b7cc
TM		 5999static void nfs4_release_lockowner_release(void *calldata)
6000{
cf470c3e 6001 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6002 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6003 kfree(calldata);
6004}
6005
17280175 6006static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6007 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6008 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6009 .rpc_release = nfs4_release_lockowner_release,
6010};
6011
f1cdae87
JL		 6012static void
6013nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6014{
cf470c3e 6015 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6016 struct rpc_message msg = {
6017 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6018 };
6019
6020 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6021 return;
fbd4bfd1 6022
cf470c3e
TM		 6023 data = kmalloc(sizeof(*data), GFP_NOFS);
6024 if (!data)
f1cdae87 6025 return;
cf470c3e 6026 data->lsp = lsp;
5ae67c4f 6027 data->server = server;
cf470c3e
TM		 6028 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6029 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6030 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6031
cf470c3e 6032 msg.rpc_argp = &data->args;
b7e63a10
TM		 6033 msg.rpc_resp = &data->res;
6034 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6035 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6036}
6037
aa1870af
BF		 6038#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6039
64c2ce8b
AK		 6040static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6041 const void *buf, size_t buflen,
6042 int flags, int type)
6b3b5496 6043{
64c2ce8b
AK		 6044 if (strcmp(key, "") != 0)
6045 return -EINVAL;
4b580ee3 6046
64c2ce8b 6047 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6048}
6049
64c2ce8b
AK		 6050static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6051 void *buf, size_t buflen, int type)
6b3b5496 6052{
64c2ce8b
AK		 6053 if (strcmp(key, "") != 0)
6054 return -EINVAL;
aa1870af 6055
64c2ce8b 6056 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6057}
6058
64c2ce8b
AK		 6059static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6060 size_t list_len, const char *name,
6061 size_t name_len, int type)
6b3b5496 6062{
64c2ce8b 6063 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6064
096455a2
BF		 6065 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
6066 return 0;
64c2ce8b
AK		 6067
6068 if (list && len <= list_len)
6069 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6070 return len;
6b3b5496
BF		 6071}
6072
c9bccef6
DQ		 6073#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6074static inline int nfs4_server_supports_labels(struct nfs_server *server)
6075{
6076 return server->caps & NFS_CAP_SECURITY_LABEL;
6077}
6078
6079static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6080 const void *buf, size_t buflen,
6081 int flags, int type)
6082{
6083 if (security_ismaclabel(key))
6084 return nfs4_set_security_label(dentry, buf, buflen);
6085
6086 return -EOPNOTSUPP;
6087}
6088
6089static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6090 void *buf, size_t buflen, int type)
6091{
6092 if (security_ismaclabel(key))
6093 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
6094 return -EOPNOTSUPP;
6095}
6096
6097static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6098 size_t list_len, const char *name,
6099 size_t name_len, int type)
6100{
6101 size_t len = 0;
6102
6103 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
6104 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
6105 if (list && len <= list_len)
6106 security_inode_listsecurity(dentry->d_inode, list, len);
6107 }
6108 return len;
6109}
6110
6111static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6112 .prefix = XATTR_SECURITY_PREFIX,
6113 .list = nfs4_xattr_list_nfs4_label,
6114 .get = nfs4_xattr_get_nfs4_label,
6115 .set = nfs4_xattr_set_nfs4_label,
6116};
6117#endif
6118
6119
533eb461
AA		 6120/*
6121 * nfs_fhget will use either the mounted_on_fileid or the fileid
6122 */
69aaaae1
TM		 6123static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6124{
533eb461
AA		 6125 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6126 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6127 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6128 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6129 return;
6130
6131 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6132 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6133 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6134 fattr->nlink = 2;
6135}
6136
f05d147f
BS		 6137static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6138 const struct qstr *name,
6139 struct nfs4_fs_locations *fs_locations,
6140 struct page *page)
683b57b4
TM		 6141{
6142 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6143 u32 bitmask[3] = {
361e624f 6144 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6145 };
6146 struct nfs4_fs_locations_arg args = {
6147 .dir_fh = NFS_FH(dir),
c228fd3a 6148 .name = name,
683b57b4
TM		 6149 .page = page,
6150 .bitmask = bitmask,
6151 };
22958463
BH		 6152 struct nfs4_fs_locations_res res = {
6153 .fs_locations = fs_locations,
6154 };
683b57b4
TM		 6155 struct rpc_message msg = {
6156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6157 .rpc_argp = &args,
22958463 6158 .rpc_resp = &res,
683b57b4
TM		 6159 };
6160 int status;
6161
3110ff80 6162 dprintk("%s: start\n", __func__);
533eb461
AA		 6163
6164 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6165 * is not supported */
6166 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6167 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6168 else
6169 bitmask[0] |= FATTR4_WORD0_FILEID;
6170
c228fd3a 6171 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6172 fs_locations->server = server;
830b8e33 6173 fs_locations->nlocations = 0;
f05d147f 6174 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6175 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6176 return status;
6177}
6178
f05d147f
BS		 6179int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6180 const struct qstr *name,
6181 struct nfs4_fs_locations *fs_locations,
6182 struct page *page)
db0a9593
BS		 6183{
6184 struct nfs4_exception exception = { };
6185 int err;
6186 do {
078ea3df
TM		 6187 err = _nfs4_proc_fs_locations(client, dir, name,
6188 fs_locations, page);
6189 trace_nfs4_get_fs_locations(dir, name, err);
6190 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6191 &exception);
6192 } while (exception.retry);
6193 return err;
6194}
6195
b03d735b
CL		 6196/*
6197 * This operation also signals the server that this client is
6198 * performing migration recovery. The server can stop returning
6199 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6200 * appended to this compound to identify the client ID which is
6201 * performing recovery.
6202 */
6203static int _nfs40_proc_get_locations(struct inode *inode,
6204 struct nfs4_fs_locations *locations,
6205 struct page *page, struct rpc_cred *cred)
6206{
6207 struct nfs_server *server = NFS_SERVER(inode);
6208 struct rpc_clnt *clnt = server->client;
6209 u32 bitmask[2] = {
6210 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6211 };
6212 struct nfs4_fs_locations_arg args = {
6213 .clientid = server->nfs_client->cl_clientid,
6214 .fh = NFS_FH(inode),
6215 .page = page,
6216 .bitmask = bitmask,
6217 .migration = 1, /* skip LOOKUP */
6218 .renew = 1, /* append RENEW */
6219 };
6220 struct nfs4_fs_locations_res res = {
6221 .fs_locations = locations,
6222 .migration = 1,
6223 .renew = 1,
6224 };
6225 struct rpc_message msg = {
6226 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6227 .rpc_argp = &args,
6228 .rpc_resp = &res,
6229 .rpc_cred = cred,
6230 };
6231 unsigned long now = jiffies;
6232 int status;
6233
6234 nfs_fattr_init(&locations->fattr);
6235 locations->server = server;
6236 locations->nlocations = 0;
6237
6238 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6239 nfs4_set_sequence_privileged(&args.seq_args);
6240 status = nfs4_call_sync_sequence(clnt, server, &msg,
6241 &args.seq_args, &res.seq_res);
6242 if (status)
6243 return status;
6244
6245 renew_lease(server, now);
6246 return 0;
6247}
6248
6249#ifdef CONFIG_NFS_V4_1
6250
6251/*
6252 * This operation also signals the server that this client is
6253 * performing migration recovery. The server can stop asserting
6254 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6255 * performing this operation is identified in the SEQUENCE
6256 * operation in this compound.
6257 *
6258 * When the client supports GETATTR(fs_locations_info), it can
6259 * be plumbed in here.
6260 */
6261static int _nfs41_proc_get_locations(struct inode *inode,
6262 struct nfs4_fs_locations *locations,
6263 struct page *page, struct rpc_cred *cred)
6264{
6265 struct nfs_server *server = NFS_SERVER(inode);
6266 struct rpc_clnt *clnt = server->client;
6267 u32 bitmask[2] = {
6268 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6269 };
6270 struct nfs4_fs_locations_arg args = {
6271 .fh = NFS_FH(inode),
6272 .page = page,
6273 .bitmask = bitmask,
6274 .migration = 1, /* skip LOOKUP */
6275 };
6276 struct nfs4_fs_locations_res res = {
6277 .fs_locations = locations,
6278 .migration = 1,
6279 };
6280 struct rpc_message msg = {
6281 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6282 .rpc_argp = &args,
6283 .rpc_resp = &res,
6284 .rpc_cred = cred,
6285 };
6286 int status;
6287
6288 nfs_fattr_init(&locations->fattr);
6289 locations->server = server;
6290 locations->nlocations = 0;
6291
6292 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6293 nfs4_set_sequence_privileged(&args.seq_args);
6294 status = nfs4_call_sync_sequence(clnt, server, &msg,
6295 &args.seq_args, &res.seq_res);
6296 if (status == NFS4_OK &&
6297 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6298 status = -NFS4ERR_LEASE_MOVED;
6299 return status;
6300}
6301
6302#endif /* CONFIG_NFS_V4_1 */
6303
6304/**
6305 * nfs4_proc_get_locations - discover locations for a migrated FSID
6306 * @inode: inode on FSID that is migrating
6307 * @locations: result of query
6308 * @page: buffer
6309 * @cred: credential to use for this operation
6310 *
6311 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6312 * operation failed, or a negative errno if a local error occurred.
6313 *
6314 * On success, "locations" is filled in, but if the server has
6315 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6316 * asserted.
6317 *
6318 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6319 * from this client that require migration recovery.
6320 */
6321int nfs4_proc_get_locations(struct inode *inode,
6322 struct nfs4_fs_locations *locations,
6323 struct page *page, struct rpc_cred *cred)
6324{
6325 struct nfs_server *server = NFS_SERVER(inode);
6326 struct nfs_client *clp = server->nfs_client;
6327 const struct nfs4_mig_recovery_ops *ops =
6328 clp->cl_mvops->mig_recovery_ops;
6329 struct nfs4_exception exception = { };
6330 int status;
6331
6332 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6333 (unsigned long long)server->fsid.major,
6334 (unsigned long long)server->fsid.minor,
6335 clp->cl_hostname);
6336 nfs_display_fhandle(NFS_FH(inode), __func__);
6337
6338 do {
6339 status = ops->get_locations(inode, locations, page, cred);
6340 if (status != -NFS4ERR_DELAY)
6341 break;
6342 nfs4_handle_exception(server, status, &exception);
6343 } while (exception.retry);
6344 return status;
6345}
6346
44c99933
CL		 6347/*
6348 * This operation also signals the server that this client is
6349 * performing "lease moved" recovery. The server can stop
6350 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6351 * is appended to this compound to identify the client ID which is
6352 * performing recovery.
6353 */
6354static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6355{
6356 struct nfs_server *server = NFS_SERVER(inode);
6357 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6358 struct rpc_clnt *clnt = server->client;
6359 struct nfs4_fsid_present_arg args = {
6360 .fh = NFS_FH(inode),
6361 .clientid = clp->cl_clientid,
6362 .renew = 1, /* append RENEW */
6363 };
6364 struct nfs4_fsid_present_res res = {
6365 .renew = 1,
6366 };
6367 struct rpc_message msg = {
6368 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6369 .rpc_argp = &args,
6370 .rpc_resp = &res,
6371 .rpc_cred = cred,
6372 };
6373 unsigned long now = jiffies;
6374 int status;
6375
6376 res.fh = nfs_alloc_fhandle();
6377 if (res.fh == NULL)
6378 return -ENOMEM;
6379
6380 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6381 nfs4_set_sequence_privileged(&args.seq_args);
6382 status = nfs4_call_sync_sequence(clnt, server, &msg,
6383 &args.seq_args, &res.seq_res);
6384 nfs_free_fhandle(res.fh);
6385 if (status)
6386 return status;
6387
6388 do_renew_lease(clp, now);
6389 return 0;
6390}
6391
6392#ifdef CONFIG_NFS_V4_1
6393
6394/*
6395 * This operation also signals the server that this client is
6396 * performing "lease moved" recovery. The server can stop asserting
6397 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6398 * this operation is identified in the SEQUENCE operation in this
6399 * compound.
6400 */
6401static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6402{
6403 struct nfs_server *server = NFS_SERVER(inode);
6404 struct rpc_clnt *clnt = server->client;
6405 struct nfs4_fsid_present_arg args = {
6406 .fh = NFS_FH(inode),
6407 };
6408 struct nfs4_fsid_present_res res = {
6409 };
6410 struct rpc_message msg = {
6411 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6412 .rpc_argp = &args,
6413 .rpc_resp = &res,
6414 .rpc_cred = cred,
6415 };
6416 int status;
6417
6418 res.fh = nfs_alloc_fhandle();
6419 if (res.fh == NULL)
6420 return -ENOMEM;
6421
6422 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6423 nfs4_set_sequence_privileged(&args.seq_args);
6424 status = nfs4_call_sync_sequence(clnt, server, &msg,
6425 &args.seq_args, &res.seq_res);
6426 nfs_free_fhandle(res.fh);
6427 if (status == NFS4_OK &&
6428 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6429 status = -NFS4ERR_LEASE_MOVED;
6430 return status;
6431}
6432
6433#endif /* CONFIG_NFS_V4_1 */
6434
6435/**
6436 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6437 * @inode: inode on FSID to check
6438 * @cred: credential to use for this operation
6439 *
6440 * Server indicates whether the FSID is present, moved, or not
6441 * recognized. This operation is necessary to clear a LEASE_MOVED
6442 * condition for this client ID.
6443 *
6444 * Returns NFS4_OK if the FSID is present on this server,
6445 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6446 * NFS4ERR code if some error occurred on the server, or a
6447 * negative errno if a local failure occurred.
6448 */
6449int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6450{
6451 struct nfs_server *server = NFS_SERVER(inode);
6452 struct nfs_client *clp = server->nfs_client;
6453 const struct nfs4_mig_recovery_ops *ops =
6454 clp->cl_mvops->mig_recovery_ops;
6455 struct nfs4_exception exception = { };
6456 int status;
6457
6458 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6459 (unsigned long long)server->fsid.major,
6460 (unsigned long long)server->fsid.minor,
6461 clp->cl_hostname);
6462 nfs_display_fhandle(NFS_FH(inode), __func__);
6463
6464 do {
6465 status = ops->fsid_present(inode, cred);
6466 if (status != -NFS4ERR_DELAY)
6467 break;
6468 nfs4_handle_exception(server, status, &exception);
6469 } while (exception.retry);
6470 return status;
6471}
6472
5ec16a85 6473/**
a5250def
WAA		 6474 * If 'use_integrity' is true and the state managment nfs_client
6475 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6476 * and the machine credential as per RFC3530bis and RFC5661 Security
6477 * Considerations sections. Otherwise, just use the user cred with the
6478 * filesystem's rpc_client.
5ec16a85 6479 */
a5250def 6480static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6481{
6482 int status;
6483 struct nfs4_secinfo_arg args = {
6484 .dir_fh = NFS_FH(dir),
6485 .name = name,
6486 };
6487 struct nfs4_secinfo_res res = {
6488 .flavors = flavors,
6489 };
6490 struct rpc_message msg = {
6491 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6492 .rpc_argp = &args,
6493 .rpc_resp = &res,
6494 };
a5250def 6495 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6496 struct rpc_cred *cred = NULL;
a5250def
WAA		 6497
6498 if (use_integrity) {
6499 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6500 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6501 msg.rpc_cred = cred;
a5250def 6502 }
5a5ea0d4
BS		 6503
6504 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6505
6506 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6507 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6508
a5250def
WAA		 6509 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6510 &res.seq_res, 0);
5a5ea0d4 6511 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6512
7cb852df
WAA		 6513 if (cred)
6514 put_rpccred(cred);
a5250def 6515
5a5ea0d4
BS		 6516 return status;
6517}
6518
72de53ec
BS		 6519int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6520 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6521{
6522 struct nfs4_exception exception = { };
6523 int err;
6524 do {
a5250def
WAA		 6525 err = -NFS4ERR_WRONGSEC;
6526
6527 /* try to use integrity protection with machine cred */
6528 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6529 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6530
6531 /*
6532 * if unable to use integrity protection, or SECINFO with
6533 * integrity protection returns NFS4ERR_WRONGSEC (which is
6534 * disallowed by spec, but exists in deployed servers) use
6535 * the current filesystem's rpc_client and the user cred.
6536 */
6537 if (err == -NFS4ERR_WRONGSEC)
6538 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6539
078ea3df
TM		 6540 trace_nfs4_secinfo(dir, name, err);
6541 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6542 &exception);
6543 } while (exception.retry);
6544 return err;
6545}
6546
557134a3 6547#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6548/*
6549 * Check the exchange flags returned by the server for invalid flags, having
6550 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6551 * DS flags set.
6552 */
6553static int nfs4_check_cl_exchange_flags(u32 flags)
6554{
6555 if (flags & ~EXCHGID4_FLAG_MASK_R)
6556 goto out_inval;
6557 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6558 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6559 goto out_inval;
6560 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6561 goto out_inval;
6562 return NFS_OK;
6563out_inval:
6564 return -NFS4ERR_INVAL;
6565}
6566
78fe0f41 6567static bool
79d4e1f0
CL		 6568nfs41_same_server_scope(struct nfs41_server_scope *a,
6569 struct nfs41_server_scope *b)
78fe0f41
WAA		 6570{
6571 if (a->server_scope_sz == b->server_scope_sz &&
6572 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6573 return true;
6574
6575 return false;
6576}
6577
7c44f1ae
WAA		 6578/*
6579 * nfs4_proc_bind_conn_to_session()
6580 *
6581 * The 4.1 client currently uses the same TCP connection for the
6582 * fore and backchannel.
6583 */
2cf047c9 6584int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6585{
6586 int status;
6587 struct nfs41_bind_conn_to_session_res res;
6588 struct rpc_message msg = {
6589 .rpc_proc =
6590 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6591 .rpc_argp = clp,
6592 .rpc_resp = &res,
2cf047c9 6593 .rpc_cred = cred,
7c44f1ae
WAA		 6594 };
6595
6596 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 6597
6598 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6599 if (unlikely(res.session == NULL)) {
6600 status = -ENOMEM;
6601 goto out;
6602 }
6603
6604 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6605 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 6606 if (status == 0) {
6607 if (memcmp(res.session->sess_id.data,
6608 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6609 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6610 status = -EIO;
6611 goto out_session;
6612 }
6613 if (res.dir != NFS4_CDFS4_BOTH) {
6614 dprintk("NFS: %s: Unexpected direction from server\n",
6615 __func__);
6616 status = -EIO;
6617 goto out_session;
6618 }
6619 if (res.use_conn_in_rdma_mode) {
6620 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6621 __func__);
6622 status = -EIO;
6623 goto out_session;
6624 }
6625 }
6626out_session:
6627 kfree(res.session);
6628out:
6629 dprintk("<-- %s status= %d\n", __func__, status);
6630 return status;
6631}
6632
99fe60d0 6633/*
fa940720
WAA		 6634 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6635 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6636 */
6637static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6638 .how = SP4_MACH_CRED,
6639 .enforce.u.words = {
6640 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6641 1 << (OP_EXCHANGE_ID - 32) |
6642 1 << (OP_CREATE_SESSION - 32) |
6643 1 << (OP_DESTROY_SESSION - 32) |
6644 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6645 },
6646 .allow.u.words = {
6647 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6648 1 << (OP_LOCKU) |
6649 1 << (OP_COMMIT),
8b5bee2e 6650 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6651 1 << (OP_SECINFO_NO_NAME - 32) |
6652 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6653 1 << (OP_FREE_STATEID - 32) |
6654 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6655 }
6656};
6657
6658/*
6659 * Select the state protection mode for client `clp' given the server results
6660 * from exchange_id in `sp'.
99fe60d0 6661 *
2031cd1a
WAA		 6662 * Returns 0 on success, negative errno otherwise.
6663 */
6664static int nfs4_sp4_select_mode(struct nfs_client *clp,
6665 struct nfs41_state_protection *sp)
6666{
6667 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6668 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6669 1 << (OP_EXCHANGE_ID - 32) |
6670 1 << (OP_CREATE_SESSION - 32) |
6671 1 << (OP_DESTROY_SESSION - 32) |
6672 1 << (OP_DESTROY_CLIENTID - 32)
6673 };
6674 unsigned int i;
6675
6676 if (sp->how == SP4_MACH_CRED) {
6677 /* Print state protect result */
6678 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6679 for (i = 0; i <= LAST_NFS4_OP; i++) {
6680 if (test_bit(i, sp->enforce.u.longs))
6681 dfprintk(MOUNT, " enforce op %d\n", i);
6682 if (test_bit(i, sp->allow.u.longs))
6683 dfprintk(MOUNT, " allow op %d\n", i);
6684 }
6685
6686 /* make sure nothing is on enforce list that isn't supported */
6687 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6688 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6689 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6690 return -EINVAL;
6691 }
6692 }
6693
6694 /*
6695 * Minimal mode - state operations are allowed to use machine
6696 * credential. Note this already happens by default, so the
6697 * client doesn't have to do anything more than the negotiation.
6698 *
6699 * NOTE: we don't care if EXCHANGE_ID is in the list -
6700 * we're already using the machine cred for exchange_id
6701 * and will never use a different cred.
6702 */
6703 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6704 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6705 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6706 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6707 dfprintk(MOUNT, "sp4_mach_cred:\n");
6708 dfprintk(MOUNT, " minimal mode enabled\n");
6709 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6710 } else {
6711 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6712 return -EINVAL;
6713 }
fa940720
WAA		 6714
6715 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6716 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6717 dfprintk(MOUNT, " cleanup mode enabled\n");
6718 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6719 }
8b5bee2e
WAA		 6720
6721 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6722 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6723 dfprintk(MOUNT, " secinfo mode enabled\n");
6724 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6725 }
3787d506
WAA		 6726
6727 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6728 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6729 dfprintk(MOUNT, " stateid mode enabled\n");
6730 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6731 }
8c21c62c
WAA		 6732
6733 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6734 dfprintk(MOUNT, " write mode enabled\n");
6735 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6736 }
6737
6738 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6739 dfprintk(MOUNT, " commit mode enabled\n");
6740 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6741 }
2031cd1a
WAA		 6742 }
6743
6744 return 0;
6745}
6746
6747/*
6748 * _nfs4_proc_exchange_id()
6bbb4ae8 6749 *
2031cd1a 6750 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6751 */
2031cd1a
WAA		 6752static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6753 u32 sp4_how)
99fe60d0
BH		 6754{
6755 nfs4_verifier verifier;
6756 struct nfs41_exchange_id_args args = {
cd93710e 6757 .verifier = &verifier,
99fe60d0 6758 .client = clp,
cd3fadec 6759#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6760 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6761 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6762 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6763#else
6764 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6765 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6766#endif
99fe60d0
BH		 6767 };
6768 struct nfs41_exchange_id_res res = {
32b01310 6769 0
99fe60d0
BH		 6770 };
6771 int status;
6772 struct rpc_message msg = {
6773 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6774 .rpc_argp = &args,
6775 .rpc_resp = &res,
6776 .rpc_cred = cred,
6777 };
99fe60d0 6778
f092075d 6779 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6780 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6781 sizeof(args.id));
6bbb4ae8
CL		 6782 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6783 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6784 args.id_len, args.id);
99fe60d0 6785
acdeb69d 6786 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6787 GFP_NOFS);
acdeb69d 6788 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6789 status = -ENOMEM;
6790 goto out;
6791 }
78fe0f41 6792
79d4e1f0 6793 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6794 GFP_NOFS);
177313f1 6795 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6796 status = -ENOMEM;
acdeb69d 6797 goto out_server_owner;
abe9a6d5 6798 }
78fe0f41 6799
bbafffd2 6800 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6801 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6802 status = -ENOMEM;
6803 goto out_server_scope;
6804 }
6805
2031cd1a
WAA		 6806 switch (sp4_how) {
6807 case SP4_NONE:
6808 args.state_protect.how = SP4_NONE;
6809 break;
6810
6811 case SP4_MACH_CRED:
6812 args.state_protect = nfs4_sp4_mach_cred_request;
6813 break;
6814
6815 default:
6816 /* unsupported! */
6817 WARN_ON_ONCE(1);
6818 status = -EINVAL;
6819 goto out_server_scope;
6820 }
6821
1bd714f2 6822 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6823 trace_nfs4_exchange_id(clp, status);
177313f1 6824 if (status == 0)
32b01310 6825 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6826
2031cd1a
WAA		 6827 if (status == 0)
6828 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6829
acdeb69d 6830 if (status == 0) {
32b01310
TM		 6831 clp->cl_clientid = res.clientid;
6832 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6833 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6834 clp->cl_seqid = res.seqid;
6835
acdeb69d
CL		 6836 kfree(clp->cl_serverowner);
6837 clp->cl_serverowner = res.server_owner;
6838 res.server_owner = NULL;
78fe0f41 6839
7d2ed9ac 6840 /* use the most recent implementation id */
59155546
CL		 6841 kfree(clp->cl_implid);
6842 clp->cl_implid = res.impl_id;
7d2ed9ac 6843
177313f1 6844 if (clp->cl_serverscope != NULL &&
79d4e1f0 6845 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6846 res.server_scope)) {
6847 dprintk("%s: server_scope mismatch detected\n",
6848 __func__);
6849 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6850 kfree(clp->cl_serverscope);
6851 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6852 }
6853
177313f1 6854 if (clp->cl_serverscope == NULL) {
79d4e1f0 6855 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6856 goto out;
6857 }
32b01310
TM		 6858 } else
6859 kfree(res.impl_id);
7d2ed9ac 6860
acdeb69d
CL		 6861out_server_owner:
6862 kfree(res.server_owner);
7d2ed9ac 6863out_server_scope:
abe9a6d5
WAA		 6864 kfree(res.server_scope);
6865out:
177313f1 6866 if (clp->cl_implid != NULL)
6bbb4ae8 6867 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6868 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6869 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6870 clp->cl_implid->date.seconds,
6871 clp->cl_implid->date.nseconds);
6bbb4ae8 6872 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6873 return status;
6874}
6875
2031cd1a
WAA		 6876/*
6877 * nfs4_proc_exchange_id()
6878 *
6879 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6880 *
6881 * Since the clientid has expired, all compounds using sessions
6882 * associated with the stale clientid will be returning
6883 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6884 * be in some phase of session reset.
6885 *
6886 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6887 */
6888int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6889{
6890 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6891 int status;
6892
6893 /* try SP4_MACH_CRED if krb5i/p */
6894 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6895 authflavor == RPC_AUTH_GSS_KRB5P) {
6896 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6897 if (!status)
6898 return 0;
6899 }
6900
6901 /* try SP4_NONE */
6902 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6903}
6904
66245539
TM		 6905static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6906 struct rpc_cred *cred)
6907{
6908 struct rpc_message msg = {
6909 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6910 .rpc_argp = clp,
6911 .rpc_cred = cred,
6912 };
6913 int status;
6914
6915 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6916 trace_nfs4_destroy_clientid(clp, status);
66245539 6917 if (status)
02c67525 6918 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6919 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6920 return status;
6921}
6922
6923static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6924 struct rpc_cred *cred)
6925{
6926 unsigned int loop;
6927 int ret;
6928
6929 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6930 ret = _nfs4_proc_destroy_clientid(clp, cred);
6931 switch (ret) {
6932 case -NFS4ERR_DELAY:
6933 case -NFS4ERR_CLIENTID_BUSY:
6934 ssleep(1);
6935 break;
6936 default:
6937 return ret;
6938 }
6939 }
6940 return 0;
6941}
6942
6943int nfs4_destroy_clientid(struct nfs_client *clp)
6944{
6945 struct rpc_cred *cred;
6946 int ret = 0;
6947
6948 if (clp->cl_mvops->minor_version < 1)
6949 goto out;
6950 if (clp->cl_exchange_flags == 0)
6951 goto out;
05f4c350
CL		 6952 if (clp->cl_preserve_clid)
6953 goto out;
73d8bde5 6954 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6955 ret = nfs4_proc_destroy_clientid(clp, cred);
6956 if (cred)
6957 put_rpccred(cred);
6958 switch (ret) {
6959 case 0:
6960 case -NFS4ERR_STALE_CLIENTID:
6961 clp->cl_exchange_flags = 0;
6962 }
6963out:
6964 return ret;
6965}
6966
2050f0cc
AA		 6967struct nfs4_get_lease_time_data {
6968 struct nfs4_get_lease_time_args *args;
6969 struct nfs4_get_lease_time_res *res;
6970 struct nfs_client *clp;
6971};
6972
6973static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6974 void *calldata)
6975{
2050f0cc
AA		 6976 struct nfs4_get_lease_time_data *data =
6977 (struct nfs4_get_lease_time_data *)calldata;
6978
6979 dprintk("--> %s\n", __func__);
6980 /* just setup sequence, do not trigger session recovery
6981 since we're invoked within one */
d9afbd1b
TM		 6982 nfs41_setup_sequence(data->clp->cl_session,
6983 &data->args->la_seq_args,
6984 &data->res->lr_seq_res,
6985 task);
2050f0cc
AA		 6986 dprintk("<-- %s\n", __func__);
6987}
6988
6989/*
6990 * Called from nfs4_state_manager thread for session setup, so don't recover
6991 * from sequence operation or clientid errors.
6992 */
6993static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6994{
6995 struct nfs4_get_lease_time_data *data =
6996 (struct nfs4_get_lease_time_data *)calldata;
6997
6998 dprintk("--> %s\n", __func__);
14516c3a
TM		 6999 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7000 return;
2050f0cc
AA		 7001 switch (task->tk_status) {
7002 case -NFS4ERR_DELAY:
7003 case -NFS4ERR_GRACE:
7004 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7005 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7006 task->tk_status = 0;
a8a4ae3a
AA		 7007 /* fall through */
7008 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7009 rpc_restart_call_prepare(task);
2050f0cc
AA		 7010 return;
7011 }
2050f0cc
AA		 7012 dprintk("<-- %s\n", __func__);
7013}
7014
17280175 7015static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7016 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7017 .rpc_call_done = nfs4_get_lease_time_done,
7018};
7019
7020int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7021{
7022 struct rpc_task *task;
7023 struct nfs4_get_lease_time_args args;
7024 struct nfs4_get_lease_time_res res = {
7025 .lr_fsinfo = fsinfo,
7026 };
7027 struct nfs4_get_lease_time_data data = {
7028 .args = &args,
7029 .res = &res,
7030 .clp = clp,
7031 };
7032 struct rpc_message msg = {
7033 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7034 .rpc_argp = &args,
7035 .rpc_resp = &res,
7036 };
7037 struct rpc_task_setup task_setup = {
7038 .rpc_client = clp->cl_rpcclient,
7039 .rpc_message = &msg,
7040 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7041 .callback_data = &data,
7042 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7043 };
7044 int status;
7045
a9c92d6b 7046 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7047 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7048 dprintk("--> %s\n", __func__);
7049 task = rpc_run_task(&task_setup);
7050
7051 if (IS_ERR(task))
7052 status = PTR_ERR(task);
7053 else {
7054 status = task->tk_status;
7055 rpc_put_task(task);
7056 }
7057 dprintk("<-- %s return %d\n", __func__, status);
7058
7059 return status;
7060}
7061
fc931582
AA		 7062/*
7063 * Initialize the values to be used by the client in CREATE_SESSION
7064 * If nfs4_init_session set the fore channel request and response sizes,
7065 * use them.
7066 *
7067 * Set the back channel max_resp_sz_cached to zero to force the client to
7068 * always set csa_cachethis to FALSE because the current implementation
7069 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7070 */
7071static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7072{
18aad3d5
AA		 7073 unsigned int max_rqst_sz, max_resp_sz;
7074
7075 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7076 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7077
fc931582 7078 /* Fore channel attributes */
18aad3d5
AA		 7079 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7080 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7081 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7082 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7083
7084 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7085 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7086 __func__,
7087 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7088 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7089
7090 /* Back channel attributes */
fc931582
AA		 7091 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7092 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7093 args->bc_attrs.max_resp_sz_cached = 0;
7094 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7095 args->bc_attrs.max_reqs = 1;
7096
7097 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7098 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7099 __func__,
7100 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7101 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7102 args->bc_attrs.max_reqs);
7103}
7104
43c2e885 7105static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 7106{
43c2e885
BF		 7107 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7108 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
7109
43c2e885
BF		 7110 if (rcvd->max_resp_sz > sent->max_resp_sz)
7111 return -EINVAL;
7112 /*
7113 * Our requested max_ops is the minimum we need; we're not
7114 * prepared to break up compounds into smaller pieces than that.
7115 * So, no point even trying to continue if the server won't
7116 * cooperate:
7117 */
7118 if (rcvd->max_ops < sent->max_ops)
7119 return -EINVAL;
7120 if (rcvd->max_reqs == 0)
7121 return -EINVAL;
b4b9a0c1
VG		 7122 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7123 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7124 return 0;
8d35301d
AA		 7125}
7126
43c2e885
BF		 7127static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
7128{
7129 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7130 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 7131
43c2e885
BF		 7132 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7133 return -EINVAL;
7134 if (rcvd->max_resp_sz < sent->max_resp_sz)
7135 return -EINVAL;
7136 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7137 return -EINVAL;
7138 /* These would render the backchannel useless: */
b4b9a0c1 7139 if (rcvd->max_ops != sent->max_ops)
43c2e885 7140 return -EINVAL;
b4b9a0c1 7141 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 7142 return -EINVAL;
7143 return 0;
7144}
8d35301d 7145
8d35301d
AA		 7146static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7147 struct nfs4_session *session)
7148{
43c2e885 7149 int ret;
8d35301d 7150
43c2e885
BF		 7151 ret = nfs4_verify_fore_channel_attrs(args, session);
7152 if (ret)
7153 return ret;
7154 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 7155}
7156
848f5bda
TM		 7157static int _nfs4_proc_create_session(struct nfs_client *clp,
7158 struct rpc_cred *cred)
fc931582
AA		 7159{
7160 struct nfs4_session *session = clp->cl_session;
7161 struct nfs41_create_session_args args = {
7162 .client = clp,
7163 .cb_program = NFS4_CALLBACK,
7164 };
7165 struct nfs41_create_session_res res = {
7166 .client = clp,
7167 };
7168 struct rpc_message msg = {
7169 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7170 .rpc_argp = &args,
7171 .rpc_resp = &res,
848f5bda 7172 .rpc_cred = cred,
fc931582
AA		 7173 };
7174 int status;
7175
7176 nfs4_init_channel_attrs(&args);
0f91421e 7177 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7178
1bd714f2 7179 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7180 trace_nfs4_create_session(clp, status);
fc931582 7181
43095d39 7182 if (!status) {
8d35301d
AA		 7183 /* Verify the session's negotiated channel_attrs values */
7184 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 7185 /* Increment the clientid slot sequence id */
7186 clp->cl_seqid++;
7187 }
7188
7189 return status;
7190}
7191
7192/*
7193 * Issues a CREATE_SESSION operation to the server.
7194 * It is the responsibility of the caller to verify the session is
7195 * expired before calling this routine.
7196 */
848f5bda 7197int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7198{
7199 int status;
7200 unsigned *ptr;
fc931582
AA		 7201 struct nfs4_session *session = clp->cl_session;
7202
7203 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7204
848f5bda 7205 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7206 if (status)
7207 goto out;
7208
aacd5537
AA		 7209 /* Init or reset the session slot tables */
7210 status = nfs4_setup_session_slot_tables(session);
7211 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7212 if (status)
7213 goto out;
7214
7215 ptr = (unsigned *)&session->sess_id.data[0];
7216 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7217 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7218out:
7219 dprintk("<-- %s\n", __func__);
7220 return status;
7221}
7222
0f3e66c6
AA		 7223/*
7224 * Issue the over-the-wire RPC DESTROY_SESSION.
7225 * The caller must serialize access to this routine.
7226 */
848f5bda
TM		 7227int nfs4_proc_destroy_session(struct nfs4_session *session,
7228 struct rpc_cred *cred)
0f3e66c6 7229{
848f5bda
TM		 7230 struct rpc_message msg = {
7231 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7232 .rpc_argp = session,
7233 .rpc_cred = cred,
7234 };
0f3e66c6 7235 int status = 0;
0f3e66c6
AA		 7236
7237 dprintk("--> nfs4_proc_destroy_session\n");
7238
7239 /* session is still being setup */
7240 if (session->clp->cl_cons_state != NFS_CS_READY)
7241 return status;
7242
1bd714f2 7243 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7244 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7245
7246 if (status)
08106ac7 7247 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7248 "Session has been destroyed regardless...\n", status);
7249
7250 dprintk("<-- nfs4_proc_destroy_session\n");
7251 return status;
7252}
7253
fc01cea9
AA		 7254/*
7255 * Renew the cl_session lease.
7256 */
d5f8d3fe
TM		 7257struct nfs4_sequence_data {
7258 struct nfs_client *clp;
7259 struct nfs4_sequence_args args;
7260 struct nfs4_sequence_res res;
7261};
7262
dc96aef9
AB		 7263static void nfs41_sequence_release(void *data)
7264{
d5f8d3fe
TM		 7265 struct nfs4_sequence_data *calldata = data;
7266 struct nfs_client *clp = calldata->clp;
dc96aef9 7267
7135840f
AB		 7268 if (atomic_read(&clp->cl_count) > 1)
7269 nfs4_schedule_state_renewal(clp);
7270 nfs_put_client(clp);
d5f8d3fe 7271 kfree(calldata);
dc96aef9
AB		 7272}
7273
aa5190d0
TM		 7274static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7275{
7276 switch(task->tk_status) {
7277 case -NFS4ERR_DELAY:
aa5190d0
TM		 7278 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7279 return -EAGAIN;
7280 default:
0400a6b0 7281 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7282 }
7283 return 0;
7284}
7285
dc96aef9 7286static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7287{
d5f8d3fe
TM		 7288 struct nfs4_sequence_data *calldata = data;
7289 struct nfs_client *clp = calldata->clp;
fc01cea9 7290
14516c3a
TM		 7291 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7292 return;
fc01cea9 7293
c6d01c6f 7294 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7295 if (task->tk_status < 0) {
7296 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7297 if (atomic_read(&clp->cl_count) == 1)
7298 goto out;
fc01cea9 7299
aa5190d0
TM		 7300 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7301 rpc_restart_call_prepare(task);
fc01cea9
AA		 7302 return;
7303 }
7304 }
fc01cea9 7305 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7306out:
fc01cea9
AA		 7307 dprintk("<-- %s\n", __func__);
7308}
7309
7310static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7311{
d5f8d3fe
TM		 7312 struct nfs4_sequence_data *calldata = data;
7313 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7314 struct nfs4_sequence_args *args;
7315 struct nfs4_sequence_res *res;
7316
fc01cea9
AA		 7317 args = task->tk_msg.rpc_argp;
7318 res = task->tk_msg.rpc_resp;
7319
d9afbd1b 7320 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7321}
7322
7323static const struct rpc_call_ops nfs41_sequence_ops = {
7324 .rpc_call_done = nfs41_sequence_call_done,
7325 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7326 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7327};
7328
8fe72bac
TM		 7329static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7330 struct rpc_cred *cred,
7331 bool is_privileged)
fc01cea9 7332{
d5f8d3fe 7333 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7334 struct rpc_message msg = {
7335 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7336 .rpc_cred = cred,
7337 };
71ac6da9
TM		 7338 struct rpc_task_setup task_setup_data = {
7339 .rpc_client = clp->cl_rpcclient,
7340 .rpc_message = &msg,
8fe72bac 7341 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7342 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7343 };
fc01cea9 7344
7135840f 7345 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7346 return ERR_PTR(-EIO);
dfb4f309 7347 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7348 if (calldata == NULL) {
7135840f 7349 nfs_put_client(clp);
71ac6da9 7350 return ERR_PTR(-ENOMEM);
fc01cea9 7351 }
a9c92d6b 7352 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7353 if (is_privileged)
7354 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7355 msg.rpc_argp = &calldata->args;
7356 msg.rpc_resp = &calldata->res;
7357 calldata->clp = clp;
71ac6da9 7358 task_setup_data.callback_data = calldata;
fc01cea9 7359
71ac6da9
TM		 7360 return rpc_run_task(&task_setup_data);
7361}
7362
2f60ea6b 7363static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7364{
7365 struct rpc_task *task;
7366 int ret = 0;
7367
2f60ea6b 7368 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7369 return -EAGAIN;
8fe72bac 7370 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7371 if (IS_ERR(task))
7372 ret = PTR_ERR(task);
7373 else
bf294b41 7374 rpc_put_task_async(task);
71ac6da9
TM		 7375 dprintk("<-- %s status=%d\n", __func__, ret);
7376 return ret;
7377}
7378
7379static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7380{
7381 struct rpc_task *task;
7382 int ret;
7383
8fe72bac 7384 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7385 if (IS_ERR(task)) {
7386 ret = PTR_ERR(task);
7387 goto out;
7388 }
7389 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7390 if (!ret) {
7391 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7392
7393 if (task->tk_status == 0)
7394 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7395 ret = task->tk_status;
b4410c2f 7396 }
71ac6da9
TM		 7397 rpc_put_task(task);
7398out:
7399 dprintk("<-- %s status=%d\n", __func__, ret);
7400 return ret;
fc01cea9
AA		 7401}
7402
fce5c838
RL		 7403struct nfs4_reclaim_complete_data {
7404 struct nfs_client *clp;
7405 struct nfs41_reclaim_complete_args arg;
7406 struct nfs41_reclaim_complete_res res;
7407};
7408
7409static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7410{
7411 struct nfs4_reclaim_complete_data *calldata = data;
7412
d9afbd1b
TM		 7413 nfs41_setup_sequence(calldata->clp->cl_session,
7414 &calldata->arg.seq_args,
7415 &calldata->res.seq_res,
7416 task);
fce5c838
RL		 7417}
7418
aa5190d0
TM		 7419static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7420{
7421 switch(task->tk_status) {
7422 case 0:
7423 case -NFS4ERR_COMPLETE_ALREADY:
7424 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7425 break;
7426 case -NFS4ERR_DELAY:
aa5190d0 7427 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7428 /* fall through */
7429 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7430 return -EAGAIN;
7431 default:
0400a6b0 7432 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7433 }
7434 return 0;
7435}
7436
fce5c838
RL		 7437static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7438{
7439 struct nfs4_reclaim_complete_data *calldata = data;
7440 struct nfs_client *clp = calldata->clp;
7441 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7442
7443 dprintk("--> %s\n", __func__);
14516c3a
TM		 7444 if (!nfs41_sequence_done(task, res))
7445 return;
fce5c838 7446
c6d01c6f 7447 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7448 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7449 rpc_restart_call_prepare(task);
7450 return;
7451 }
fce5c838
RL		 7452 dprintk("<-- %s\n", __func__);
7453}
7454
7455static void nfs4_free_reclaim_complete_data(void *data)
7456{
7457 struct nfs4_reclaim_complete_data *calldata = data;
7458
7459 kfree(calldata);
7460}
7461
7462static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7463 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7464 .rpc_call_done = nfs4_reclaim_complete_done,
7465 .rpc_release = nfs4_free_reclaim_complete_data,
7466};
7467
7468/*
7469 * Issue a global reclaim complete.
7470 */
965e9c23
TM		 7471static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7472 struct rpc_cred *cred)
fce5c838
RL		 7473{
7474 struct nfs4_reclaim_complete_data *calldata;
7475 struct rpc_task *task;
7476 struct rpc_message msg = {
7477 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7478 .rpc_cred = cred,
fce5c838
RL		 7479 };
7480 struct rpc_task_setup task_setup_data = {
7481 .rpc_client = clp->cl_rpcclient,
7482 .rpc_message = &msg,
7483 .callback_ops = &nfs4_reclaim_complete_call_ops,
7484 .flags = RPC_TASK_ASYNC,
7485 };
7486 int status = -ENOMEM;
7487
7488 dprintk("--> %s\n", __func__);
8535b2be 7489 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7490 if (calldata == NULL)
7491 goto out;
7492 calldata->clp = clp;
7493 calldata->arg.one_fs = 0;
fce5c838 7494
a9c92d6b 7495 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7496 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7497 msg.rpc_argp = &calldata->arg;
7498 msg.rpc_resp = &calldata->res;
7499 task_setup_data.callback_data = calldata;
7500 task = rpc_run_task(&task_setup_data);
acf82b85 7501 if (IS_ERR(task)) {
fce5c838 7502 status = PTR_ERR(task);
acf82b85
DC		 7503 goto out;
7504 }
c34c32ea
AA		 7505 status = nfs4_wait_for_completion_rpc_task(task);
7506 if (status == 0)
7507 status = task->tk_status;
fce5c838 7508 rpc_put_task(task);
acf82b85 7509 return 0;
fce5c838
RL		 7510out:
7511 dprintk("<-- %s status=%d\n", __func__, status);
7512 return status;
7513}
b1f69b75
AA		 7514
7515static void
7516nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7517{
7518 struct nfs4_layoutget *lgp = calldata;
c31663d4 7519 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7520 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7521
7522 dprintk("--> %s\n", __func__);
c31663d4
FI		 7523 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7524 * right now covering the LAYOUTGET we are about to send.
7525 * However, that is not so catastrophic, and there seems
7526 * to be no way to prevent it completely.
7527 */
6ba7db34 7528 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7529 &lgp->res.seq_res, task))
b1f69b75 7530 return;
cf7d63f1
FI		 7531 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7532 NFS_I(lgp->args.inode)->layout,
7533 lgp->args.ctx->state)) {
7534 rpc_exit(task, NFS4_OK);
cf7d63f1 7535 }
b1f69b75
AA		 7536}
7537
7538static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7539{
7540 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7541 struct inode *inode = lgp->args.inode;
7542 struct nfs_server *server = NFS_SERVER(inode);
7543 struct pnfs_layout_hdr *lo;
7544 struct nfs4_state *state = NULL;
ed7e5423 7545 unsigned long timeo, now, giveup;
b1f69b75 7546
ed7e5423 7547 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7548
6ba7db34 7549 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7550 goto out;
b1f69b75
AA		 7551
7552 switch (task->tk_status) {
7553 case 0:
ee314c2a 7554 goto out;
ed7e5423
BH		 7555 /*
7556 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7557 * (or clients) writing to the same RAID stripe
7558 */
b1f69b75 7559 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7560 /*
7561 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7562 * existing layout before getting a new one).
7563 */
b1f69b75 7564 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7565 timeo = rpc_get_timeout(task->tk_client);
7566 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7567 now = jiffies;
7568 if (time_after(giveup, now)) {
7569 unsigned long delay;
7570
7571 /* Delay for:
7572 * - Not less then NFS4_POLL_RETRY_MIN.
7573 * - One last time a jiffie before we give up
7574 * - exponential backoff (time_now minus start_attempt)
7575 */
7576 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7577 min((giveup - now - 1),
7578 now - lgp->args.timestamp));
7579
7580 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7581 __func__, delay);
7582 rpc_delay(task, delay);
7583 task->tk_status = 0;
7584 rpc_restart_call_prepare(task);
7585 goto out; /* Do not call nfs4_async_handle_error() */
7586 }
ee314c2a
TM		 7587 break;
7588 case -NFS4ERR_EXPIRED:
7589 case -NFS4ERR_BAD_STATEID:
7590 spin_lock(&inode->i_lock);
7591 lo = NFS_I(inode)->layout;
7592 if (!lo || list_empty(&lo->plh_segs)) {
7593 spin_unlock(&inode->i_lock);
7594 /* If the open stateid was bad, then recover it. */
7595 state = lgp->args.ctx->state;
7596 } else {
7597 LIST_HEAD(head);
7598
defb8460
CH		 7599 /*
7600 * Mark the bad layout state as invalid, then retry
7601 * with the current stateid.
7602 */
ee314c2a
TM		 7603 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7604 spin_unlock(&inode->i_lock);
ee314c2a 7605 pnfs_free_lseg_list(&head);
defb8460
CH		 7606
7607 task->tk_status = 0;
7608 rpc_restart_call_prepare(task);
b1f69b75
AA		 7609 }
7610 }
8478eaa1 7611 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
ee314c2a
TM		 7612 rpc_restart_call_prepare(task);
7613out:
b1f69b75
AA		 7614 dprintk("<-- %s\n", __func__);
7615}
7616
8554116e
IK		 7617static size_t max_response_pages(struct nfs_server *server)
7618{
7619 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7620 return nfs_page_array_len(0, max_resp_sz);
7621}
7622
7623static void nfs4_free_pages(struct page **pages, size_t size)
7624{
7625 int i;
7626
7627 if (!pages)
7628 return;
7629
7630 for (i = 0; i < size; i++) {
7631 if (!pages[i])
7632 break;
7633 __free_page(pages[i]);
7634 }
7635 kfree(pages);
7636}
7637
7638static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7639{
7640 struct page **pages;
7641 int i;
7642
7643 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7644 if (!pages) {
7645 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7646 return NULL;
7647 }
7648
7649 for (i = 0; i < size; i++) {
7650 pages[i] = alloc_page(gfp_flags);
7651 if (!pages[i]) {
7652 dprintk("%s: failed to allocate page\n", __func__);
7653 nfs4_free_pages(pages, size);
7654 return NULL;
7655 }
7656 }
7657
7658 return pages;
7659}
7660
b1f69b75
AA		 7661static void nfs4_layoutget_release(void *calldata)
7662{
7663 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7664 struct inode *inode = lgp->args.inode;
7665 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7666 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7667
7668 dprintk("--> %s\n", __func__);
8554116e 7669 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7670 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7671 put_nfs_open_context(lgp->args.ctx);
7672 kfree(calldata);
7673 dprintk("<-- %s\n", __func__);
7674}
7675
7676static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7677 .rpc_call_prepare = nfs4_layoutget_prepare,
7678 .rpc_call_done = nfs4_layoutget_done,
7679 .rpc_release = nfs4_layoutget_release,
7680};
7681
a0b0a6e3
TM		 7682struct pnfs_layout_segment *
7683nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7684{
a47970ff
WAA		 7685 struct inode *inode = lgp->args.inode;
7686 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7687 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7688 struct rpc_task *task;
7689 struct rpc_message msg = {
7690 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7691 .rpc_argp = &lgp->args,
7692 .rpc_resp = &lgp->res,
6ab59344 7693 .rpc_cred = lgp->cred,
b1f69b75
AA		 7694 };
7695 struct rpc_task_setup task_setup_data = {
7696 .rpc_client = server->client,
7697 .rpc_message = &msg,
7698 .callback_ops = &nfs4_layoutget_call_ops,
7699 .callback_data = lgp,
7700 .flags = RPC_TASK_ASYNC,
7701 };
a0b0a6e3 7702 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7703 int status = 0;
7704
7705 dprintk("--> %s\n", __func__);
7706
8554116e
IK		 7707 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7708 if (!lgp->args.layout.pages) {
7709 nfs4_layoutget_release(lgp);
a0b0a6e3 7710 return ERR_PTR(-ENOMEM);
8554116e
IK		 7711 }
7712 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7713 lgp->args.timestamp = jiffies;
8554116e 7714
35124a09 7715 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7716 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7717 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 7718
7719 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7720 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7721
b1f69b75
AA		 7722 task = rpc_run_task(&task_setup_data);
7723 if (IS_ERR(task))
a0b0a6e3 7724 return ERR_CAST(task);
b1f69b75 7725 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7726 if (status == 0)
7727 status = task->tk_status;
1037e6ea
TM		 7728 trace_nfs4_layoutget(lgp->args.ctx,
7729 &lgp->args.range,
7730 &lgp->res.range,
7731 status);
085b7a45
WAA		 7732 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7733 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7734 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7735 rpc_put_task(task);
7736 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7737 if (status)
7738 return ERR_PTR(status);
7739 return lseg;
b1f69b75
AA		 7740}
7741
cbe82603
BH		 7742static void
7743nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7744{
7745 struct nfs4_layoutreturn *lrp = calldata;
7746
7747 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7748 nfs41_setup_sequence(lrp->clp->cl_session,
7749 &lrp->args.seq_args,
7750 &lrp->res.seq_res,
7751 task);
cbe82603
BH		 7752}
7753
7754static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7755{
7756 struct nfs4_layoutreturn *lrp = calldata;
7757 struct nfs_server *server;
7758
7759 dprintk("--> %s\n", __func__);
7760
6ba7db34 7761 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7762 return;
7763
7764 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7765 switch (task->tk_status) {
7766 default:
7767 task->tk_status = 0;
7768 case 0:
7769 break;
7770 case -NFS4ERR_DELAY:
8478eaa1 7771 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 7772 break;
d00c5d43 7773 rpc_restart_call_prepare(task);
cbe82603
BH		 7774 return;
7775 }
cbe82603
BH		 7776 dprintk("<-- %s\n", __func__);
7777}
7778
7779static void nfs4_layoutreturn_release(void *calldata)
7780{
7781 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7782 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7783
7784 dprintk("--> %s\n", __func__);
849b286f
TM		 7785 spin_lock(&lo->plh_inode->i_lock);
7786 if (lrp->res.lrs_present)
7787 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7788 lo->plh_block_lgets--;
7789 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7790 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 7791 kfree(calldata);
7792 dprintk("<-- %s\n", __func__);
7793}
7794
7795static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7796 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7797 .rpc_call_done = nfs4_layoutreturn_done,
7798 .rpc_release = nfs4_layoutreturn_release,
7799};
7800
7801int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7802{
7803 struct rpc_task *task;
7804 struct rpc_message msg = {
7805 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7806 .rpc_argp = &lrp->args,
7807 .rpc_resp = &lrp->res,
9556000d 7808 .rpc_cred = lrp->cred,
cbe82603
BH		 7809 };
7810 struct rpc_task_setup task_setup_data = {
1771c577 7811 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7812 .rpc_message = &msg,
7813 .callback_ops = &nfs4_layoutreturn_call_ops,
7814 .callback_data = lrp,
7815 };
7816 int status;
7817
7818 dprintk("--> %s\n", __func__);
a9c92d6b 7819 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7820 task = rpc_run_task(&task_setup_data);
7821 if (IS_ERR(task))
7822 return PTR_ERR(task);
7823 status = task->tk_status;
1037e6ea 7824 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7825 dprintk("<-- %s status=%d\n", __func__, status);
7826 rpc_put_task(task);
7827 return status;
7828}
7829
b1f69b75 7830static int
cd5875fe
TM		 7831_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7832 struct pnfs_device *pdev,
7833 struct rpc_cred *cred)
b1f69b75
AA		 7834{
7835 struct nfs4_getdeviceinfo_args args = {
7836 .pdev = pdev,
7837 };
7838 struct nfs4_getdeviceinfo_res res = {
7839 .pdev = pdev,
7840 };
7841 struct rpc_message msg = {
7842 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7843 .rpc_argp = &args,
7844 .rpc_resp = &res,
cd5875fe 7845 .rpc_cred = cred,
b1f69b75
AA		 7846 };
7847 int status;
7848
7849 dprintk("--> %s\n", __func__);
7c513058 7850 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7851 dprintk("<-- %s status=%d\n", __func__, status);
7852
7853 return status;
7854}
7855
cd5875fe
TM		 7856int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7857 struct pnfs_device *pdev,
7858 struct rpc_cred *cred)
b1f69b75
AA		 7859{
7860 struct nfs4_exception exception = { };
7861 int err;
7862
7863 do {
7864 err = nfs4_handle_exception(server,
cd5875fe 7865 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7866 &exception);
7867 } while (exception.retry);
7868 return err;
7869}
7870EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7871
863a3c6c
AA		 7872static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7873{
7874 struct nfs4_layoutcommit_data *data = calldata;
7875 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7876 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7877
d9afbd1b
TM		 7878 nfs41_setup_sequence(session,
7879 &data->args.seq_args,
7880 &data->res.seq_res,
7881 task);
863a3c6c
AA		 7882}
7883
7884static void
7885nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7886{
7887 struct nfs4_layoutcommit_data *data = calldata;
7888 struct nfs_server *server = NFS_SERVER(data->args.inode);
7889
6ba7db34 7890 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7891 return;
7892
7893 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7894 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7895 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7896 case -NFS4ERR_BADLAYOUT: /* no layout */
7897 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7898 task->tk_status = 0;
e59d27e0 7899 case 0:
e59d27e0
TM		 7900 break;
7901 default:
8478eaa1 7902 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 7903 rpc_restart_call_prepare(task);
7904 return;
7905 }
7906 }
863a3c6c
AA		 7907}
7908
7909static void nfs4_layoutcommit_release(void *calldata)
7910{
7911 struct nfs4_layoutcommit_data *data = calldata;
7912
db29c089 7913 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 7914 nfs_post_op_update_inode_force_wcc(data->args.inode,
7915 data->res.fattr);
863a3c6c
AA		 7916 put_rpccred(data->cred);
7917 kfree(data);
7918}
7919
7920static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7921 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7922 .rpc_call_done = nfs4_layoutcommit_done,
7923 .rpc_release = nfs4_layoutcommit_release,
7924};
7925
7926int
ef311537 7927nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7928{
7929 struct rpc_message msg = {
7930 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7931 .rpc_argp = &data->args,
7932 .rpc_resp = &data->res,
7933 .rpc_cred = data->cred,
7934 };
7935 struct rpc_task_setup task_setup_data = {
7936 .task = &data->task,
7937 .rpc_client = NFS_CLIENT(data->args.inode),
7938 .rpc_message = &msg,
7939 .callback_ops = &nfs4_layoutcommit_ops,
7940 .callback_data = data,
7941 .flags = RPC_TASK_ASYNC,
7942 };
7943 struct rpc_task *task;
7944 int status = 0;
7945
7946 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7947 "lbw: %llu inode %lu\n",
7948 data->task.tk_pid, sync,
7949 data->args.lastbytewritten,
7950 data->args.inode->i_ino);
7951
a9c92d6b 7952 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7953 task = rpc_run_task(&task_setup_data);
7954 if (IS_ERR(task))
7955 return PTR_ERR(task);
ef311537 7956 if (sync == false)
863a3c6c
AA		 7957 goto out;
7958 status = nfs4_wait_for_completion_rpc_task(task);
7959 if (status != 0)
7960 goto out;
7961 status = task->tk_status;
1037e6ea 7962 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7963out:
7964 dprintk("%s: status %d\n", __func__, status);
7965 rpc_put_task(task);
7966 return status;
7967}
fca78d6d 7968
97431204
AA		 7969/**
7970 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7971 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7972 */
fca78d6d
BS		 7973static int
7974_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 7975 struct nfs_fsinfo *info,
7976 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 7977{
7978 struct nfs41_secinfo_no_name_args args = {
7979 .style = SECINFO_STYLE_CURRENT_FH,
7980 };
7981 struct nfs4_secinfo_res res = {
7982 .flavors = flavors,
7983 };
7984 struct rpc_message msg = {
7985 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7986 .rpc_argp = &args,
7987 .rpc_resp = &res,
7988 };
b1b3e136 7989 struct rpc_clnt *clnt = server->client;
7cb852df 7990 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 7991 int status;
7992
7993 if (use_integrity) {
7994 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 7995 cred = nfs4_get_clid_cred(server->nfs_client);
7996 msg.rpc_cred = cred;
b1b3e136
WAA		 7997 }
7998
7999 dprintk("--> %s\n", __func__);
8000 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8001 &res.seq_res, 0);
8002 dprintk("<-- %s status=%d\n", __func__, status);
8003
7cb852df
WAA		 8004 if (cred)
8005 put_rpccred(cred);
b1b3e136
WAA		 8006
8007 return status;
fca78d6d
BS		 8008}
8009
8010static int
8011nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8012 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8013{
8014 struct nfs4_exception exception = { };
8015 int err;
8016 do {
b1b3e136
WAA		 8017 /* first try using integrity protection */
8018 err = -NFS4ERR_WRONGSEC;
8019
8020 /* try to use integrity protection with machine cred */
8021 if (_nfs4_is_integrity_protected(server->nfs_client))
8022 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8023 flavors, true);
8024
8025 /*
8026 * if unable to use integrity protection, or SECINFO with
8027 * integrity protection returns NFS4ERR_WRONGSEC (which is
8028 * disallowed by spec, but exists in deployed servers) use
8029 * the current filesystem's rpc_client and the user cred.
8030 */
8031 if (err == -NFS4ERR_WRONGSEC)
8032 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8033 flavors, false);
8034
fca78d6d
BS		 8035 switch (err) {
8036 case 0:
8037 case -NFS4ERR_WRONGSEC:
78b19bae 8038 case -ENOTSUPP:
05e9cfb4 8039 goto out;
fca78d6d
BS		 8040 default:
8041 err = nfs4_handle_exception(server, err, &exception);
8042 }
8043 } while (exception.retry);
05e9cfb4 8044out:
fca78d6d
BS		 8045 return err;
8046}
8047
8048static int
8049nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8050 struct nfs_fsinfo *info)
8051{
8052 int err;
8053 struct page *page;
367156d9 8054 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8055 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8056 struct nfs4_secinfo4 *secinfo;
8057 int i;
fca78d6d
BS		 8058
8059 page = alloc_page(GFP_KERNEL);
8060 if (!page) {
8061 err = -ENOMEM;
8062 goto out;
8063 }
8064
8065 flavors = page_address(page);
8066 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8067
8068 /*
8069 * Fall back on "guess and check" method if
8070 * the server doesn't support SECINFO_NO_NAME
8071 */
78b19bae 8072 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8073 err = nfs4_find_root_sec(server, fhandle, info);
8074 goto out_freepage;
8075 }
8076 if (err)
8077 goto out_freepage;
8078
58a8cf12
WAA		 8079 for (i = 0; i < flavors->num_flavors; i++) {
8080 secinfo = &flavors->flavors[i];
8081
8082 switch (secinfo->flavor) {
8083 case RPC_AUTH_NULL:
8084 case RPC_AUTH_UNIX:
8085 case RPC_AUTH_GSS:
8086 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8087 &secinfo->flavor_info);
8088 break;
8089 default:
8090 flavor = RPC_AUTH_MAXFLAVOR;
8091 break;
8092 }
8093
4d4b69dd
WAA		 8094 if (!nfs_auth_info_match(&server->auth_info, flavor))
8095 flavor = RPC_AUTH_MAXFLAVOR;
8096
58a8cf12
WAA		 8097 if (flavor != RPC_AUTH_MAXFLAVOR) {
8098 err = nfs4_lookup_root_sec(server, fhandle,
8099 info, flavor);
8100 if (!err)
8101 break;
8102 }
8103 }
8104
8105 if (flavor == RPC_AUTH_MAXFLAVOR)
8106 err = -EPERM;
fca78d6d
BS		 8107
8108out_freepage:
8109 put_page(page);
8110 if (err == -EACCES)
8111 return -EPERM;
8112out:
8113 return err;
8114}
1cab0652 8115
ab7cb0df
TM		 8116static int _nfs41_test_stateid(struct nfs_server *server,
8117 nfs4_stateid *stateid,
8118 struct rpc_cred *cred)
7d974794
BS		 8119{
8120 int status;
8121 struct nfs41_test_stateid_args args = {
1cab0652 8122 .stateid = stateid,
7d974794
BS		 8123 };
8124 struct nfs41_test_stateid_res res;
8125 struct rpc_message msg = {
8126 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8127 .rpc_argp = &args,
8128 .rpc_resp = &res,
ab7cb0df 8129 .rpc_cred = cred,
7d974794 8130 };
3787d506
WAA		 8131 struct rpc_clnt *rpc_client = server->client;
8132
8133 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8134 &rpc_client, &msg);
1cab0652 8135
38527b15 8136 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8137 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8138 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8139 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8140 &args.seq_args, &res.seq_res);
38527b15
CL		 8141 if (status != NFS_OK) {
8142 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8143 return status;
38527b15
CL		 8144 }
8145 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8146 return -res.status;
7d974794
BS		 8147}
8148
38527b15
CL		 8149/**
8150 * nfs41_test_stateid - perform a TEST_STATEID operation
8151 *
8152 * @server: server / transport on which to perform the operation
8153 * @stateid: state ID to test
ab7cb0df 8154 * @cred: credential
38527b15
CL		 8155 *
8156 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8157 * Otherwise a negative NFS4ERR value is returned if the operation
8158 * failed or the state ID is not currently valid.
8159 */
ab7cb0df
TM		 8160static int nfs41_test_stateid(struct nfs_server *server,
8161 nfs4_stateid *stateid,
8162 struct rpc_cred *cred)
7d974794
BS		 8163{
8164 struct nfs4_exception exception = { };
8165 int err;
8166 do {
ab7cb0df 8167 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8168 if (err != -NFS4ERR_DELAY)
8169 break;
8170 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8171 } while (exception.retry);
8172 return err;
8173}
9aeda35f 8174
7c1d5fae
TM		 8175struct nfs_free_stateid_data {
8176 struct nfs_server *server;
8177 struct nfs41_free_stateid_args args;
9aeda35f 8178 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8179};
8180
8181static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8182{
8183 struct nfs_free_stateid_data *data = calldata;
8184 nfs41_setup_sequence(nfs4_get_session(data->server),
8185 &data->args.seq_args,
8186 &data->res.seq_res,
8187 task);
8188}
8189
8190static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8191{
8192 struct nfs_free_stateid_data *data = calldata;
8193
8194 nfs41_sequence_done(task, &data->res.seq_res);
8195
8196 switch (task->tk_status) {
8197 case -NFS4ERR_DELAY:
8478eaa1 8198 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8199 rpc_restart_call_prepare(task);
8200 }
8201}
8202
8203static void nfs41_free_stateid_release(void *calldata)
8204{
8205 kfree(calldata);
8206}
8207
17f26b12 8208static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8209 .rpc_call_prepare = nfs41_free_stateid_prepare,
8210 .rpc_call_done = nfs41_free_stateid_done,
8211 .rpc_release = nfs41_free_stateid_release,
8212};
8213
8214static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8215 nfs4_stateid *stateid,
ab7cb0df 8216 struct rpc_cred *cred,
7c1d5fae
TM		 8217 bool privileged)
8218{
9aeda35f
BS		 8219 struct rpc_message msg = {
8220 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8221 .rpc_cred = cred,
9aeda35f 8222 };
7c1d5fae
TM		 8223 struct rpc_task_setup task_setup = {
8224 .rpc_client = server->client,
8225 .rpc_message = &msg,
8226 .callback_ops = &nfs41_free_stateid_ops,
8227 .flags = RPC_TASK_ASYNC,
8228 };
8229 struct nfs_free_stateid_data *data;
9aeda35f 8230
3787d506
WAA		 8231 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8232 &task_setup.rpc_client, &msg);
8233
38527b15 8234 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8235 data = kmalloc(sizeof(*data), GFP_NOFS);
8236 if (!data)
8237 return ERR_PTR(-ENOMEM);
8238 data->server = server;
8239 nfs4_stateid_copy(&data->args.stateid, stateid);
8240
8241 task_setup.callback_data = data;
8242
8243 msg.rpc_argp = &data->args;
8244 msg.rpc_resp = &data->res;
a9c92d6b 8245 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8246 if (privileged)
8247 nfs4_set_sequence_privileged(&data->args.seq_args);
8248
8249 return rpc_run_task(&task_setup);
9aeda35f
BS		 8250}
8251
38527b15
CL		 8252/**
8253 * nfs41_free_stateid - perform a FREE_STATEID operation
8254 *
8255 * @server: server / transport on which to perform the operation
8256 * @stateid: state ID to release
ab7cb0df 8257 * @cred: credential
38527b15
CL		 8258 *
8259 * Returns NFS_OK if the server freed "stateid". Otherwise a
8260 * negative NFS4ERR value is returned.
8261 */
ab7cb0df
TM		 8262static int nfs41_free_stateid(struct nfs_server *server,
8263 nfs4_stateid *stateid,
8264 struct rpc_cred *cred)
9aeda35f 8265{
7c1d5fae
TM		 8266 struct rpc_task *task;
8267 int ret;
8268
ab7cb0df 8269 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8270 if (IS_ERR(task))
8271 return PTR_ERR(task);
8272 ret = rpc_wait_for_completion_task(task);
8273 if (!ret)
8274 ret = task->tk_status;
8275 rpc_put_task(task);
8276 return ret;
9aeda35f 8277}
36281caa 8278
f1cdae87
JL		 8279static void
8280nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8281{
8282 struct rpc_task *task;
ab7cb0df 8283 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8284
ab7cb0df 8285 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8286 nfs4_free_lock_state(server, lsp);
8287 if (IS_ERR(task))
f1cdae87 8288 return;
c8b2d0bf 8289 rpc_put_task(task);
c8b2d0bf
TM		 8290}
8291
36281caa
TM		 8292static bool nfs41_match_stateid(const nfs4_stateid *s1,
8293 const nfs4_stateid *s2)
8294{
2d2f24ad 8295 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8296 return false;
8297
2d2f24ad 8298 if (s1->seqid == s2->seqid)
36281caa 8299 return true;
2d2f24ad 8300 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8301 return true;
8302
8303 return false;
8304}
8305
557134a3
AA		 8306#endif /* CONFIG_NFS_V4_1 */
8307
36281caa
TM		 8308static bool nfs4_match_stateid(const nfs4_stateid *s1,
8309 const nfs4_stateid *s2)
8310{
f597c537 8311 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8312}
8313
8314
17280175 8315static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8316 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8317 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8318 .recover_open = nfs4_open_reclaim,
8319 .recover_lock = nfs4_lock_reclaim,
591d71cb 8320 .establish_clid = nfs4_init_clientid,
05f4c350 8321 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8322};
8323
591d71cb 8324#if defined(CONFIG_NFS_V4_1)
17280175 8325static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8326 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8327 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8328 .recover_open = nfs4_open_reclaim,
8329 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8330 .establish_clid = nfs41_init_clientid,
fce5c838 8331 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8332 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8333};
8334#endif /* CONFIG_NFS_V4_1 */
8335
17280175 8336static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8337 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8338 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8339 .recover_open = nfs40_open_expired,
591d71cb
AA		 8340 .recover_lock = nfs4_lock_expired,
8341 .establish_clid = nfs4_init_clientid,
8342};
8343
8344#if defined(CONFIG_NFS_V4_1)
17280175 8345static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8346 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8347 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8348 .recover_open = nfs41_open_expired,
8349 .recover_lock = nfs41_lock_expired,
4d643d1d 8350 .establish_clid = nfs41_init_clientid,
1da177e4 8351};
591d71cb 8352#endif /* CONFIG_NFS_V4_1 */
1da177e4 8353
17280175 8354static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8355 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8356 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8357 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8358};
8359
8360#if defined(CONFIG_NFS_V4_1)
17280175 8361static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8362 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8363 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8364 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8365};
8366#endif
8367
ec011fe8 8368static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8369 .get_locations = _nfs40_proc_get_locations,
44c99933 8370 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8371};
8372
8373#if defined(CONFIG_NFS_V4_1)
8374static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8375 .get_locations = _nfs41_proc_get_locations,
44c99933 8376 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8377};
8378#endif /* CONFIG_NFS_V4_1 */
8379
97dc1359
TM		 8380static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8381 .minor_version = 0,
39c6daae
TM		 8382 .init_caps = NFS_CAP_READDIRPLUS
8383 | NFS_CAP_ATOMIC_OPEN
8384 | NFS_CAP_CHANGE_ATTR
8385 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8386 .init_client = nfs40_init_client,
8387 .shutdown_client = nfs40_shutdown_client,
36281caa 8388 .match_stateid = nfs4_match_stateid,
fca78d6d 8389 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8390 .free_lock_state = nfs4_release_lockowner,
9915ea7e 8391 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8392 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8393 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8394 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8395 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8396};
8397
8398#if defined(CONFIG_NFS_V4_1)
8399static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8400 .minor_version = 1,
39c6daae
TM		 8401 .init_caps = NFS_CAP_READDIRPLUS
8402 | NFS_CAP_ATOMIC_OPEN
8403 | NFS_CAP_CHANGE_ATTR
3b66486c 8404 | NFS_CAP_POSIX_LOCK
49f9a0fa 8405 | NFS_CAP_STATEID_NFSV41
e983120e 8406 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8407 .init_client = nfs41_init_client,
8408 .shutdown_client = nfs41_shutdown_client,
36281caa 8409 .match_stateid = nfs41_match_stateid,
fca78d6d 8410 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8411 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8412 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8413 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8414 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8415 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8416 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8417};
8418#endif
8419
42c2c424
SD		 8420#if defined(CONFIG_NFS_V4_2)
8421static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8422 .minor_version = 2,
7017310a
BS		 8423 .init_caps = NFS_CAP_READDIRPLUS
8424 | NFS_CAP_ATOMIC_OPEN
8425 | NFS_CAP_CHANGE_ATTR
8426 | NFS_CAP_POSIX_LOCK
8427 | NFS_CAP_STATEID_NFSV41
e983120e
AS		 8428 | NFS_CAP_ATOMIC_OPEN_V1
8429 | NFS_CAP_SEEK,
abf79bb3
CL		 8430 .init_client = nfs41_init_client,
8431 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8432 .match_stateid = nfs41_match_stateid,
8433 .find_root_sec = nfs41_find_root_sec,
7017310a 8434 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8435 .call_sync_ops = &nfs41_call_sync_ops,
42c2c424
SD		 8436 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8437 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8438 .state_renewal_ops = &nfs41_state_renewal_ops,
8439};
8440#endif
8441
97dc1359
TM		 8442const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8443 [0] = &nfs_v4_0_minor_ops,
8444#if defined(CONFIG_NFS_V4_1)
8445 [1] = &nfs_v4_1_minor_ops,
8446#endif
42c2c424
SD		 8447#if defined(CONFIG_NFS_V4_2)
8448 [2] = &nfs_v4_2_minor_ops,
8449#endif
97dc1359
TM		 8450};
8451
17f26b12 8452static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8453 .create = nfs_create,
8454 .lookup = nfs_lookup,
8455 .atomic_open = nfs_atomic_open,
8456 .link = nfs_link,
8457 .unlink = nfs_unlink,
8458 .symlink = nfs_symlink,
8459 .mkdir = nfs_mkdir,
8460 .rmdir = nfs_rmdir,
8461 .mknod = nfs_mknod,
8462 .rename = nfs_rename,
8463 .permission = nfs_permission,
8464 .getattr = nfs_getattr,
8465 .setattr = nfs_setattr,
8466 .getxattr = generic_getxattr,
8467 .setxattr = generic_setxattr,
8468 .listxattr = generic_listxattr,
8469 .removexattr = generic_removexattr,
8470};
8471
92e1d5be 8472static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8473 .permission = nfs_permission,
8474 .getattr = nfs_getattr,
8475 .setattr = nfs_setattr,
64c2ce8b
AK		 8476 .getxattr = generic_getxattr,
8477 .setxattr = generic_setxattr,
8478 .listxattr = generic_listxattr,
8479 .removexattr = generic_removexattr,
6b3b5496
BF		 8480};
8481
509de811 8482const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8483 .version = 4, /* protocol version */
8484 .dentry_ops = &nfs4_dentry_operations,
8485 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8486 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8487 .file_ops = &nfs4_file_operations,
1da177e4 8488 .getroot = nfs4_proc_get_root,
281cad46 8489 .submount = nfs4_submount,
ff9099f2 8490 .try_mount = nfs4_try_mount,
1da177e4
LT		 8491 .getattr = nfs4_proc_getattr,
8492 .setattr = nfs4_proc_setattr,
8493 .lookup = nfs4_proc_lookup,
8494 .access = nfs4_proc_access,
8495 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8496 .create = nfs4_proc_create,
8497 .remove = nfs4_proc_remove,
8498 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8499 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8500 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8501 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8502 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8503 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8504 .link = nfs4_proc_link,
8505 .symlink = nfs4_proc_symlink,
8506 .mkdir = nfs4_proc_mkdir,
8507 .rmdir = nfs4_proc_remove,
8508 .readdir = nfs4_proc_readdir,
8509 .mknod = nfs4_proc_mknod,
8510 .statfs = nfs4_proc_statfs,
8511 .fsinfo = nfs4_proc_fsinfo,
8512 .pathconf = nfs4_proc_pathconf,
e9326dca 8513 .set_capabilities = nfs4_server_capabilities,
1da177e4 8514 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8515 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8516 .read_setup = nfs4_proc_read_setup,
ec06c096 8517 .read_done = nfs4_read_done,
1da177e4 8518 .write_setup = nfs4_proc_write_setup,
788e7a89 8519 .write_done = nfs4_write_done,
1da177e4 8520 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8521 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8522 .commit_done = nfs4_commit_done,
1da177e4 8523 .lock = nfs4_proc_lock,
e50a1c2e 8524 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8525 .close_context = nfs4_close_context,
2b484297 8526 .open_context = nfs4_atomic_open,
011e2a7f 8527 .have_delegation = nfs4_have_delegation,
57ec14c5 8528 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8529 .alloc_client = nfs4_alloc_client,
45a52a02 8530 .init_client = nfs4_init_client,
cdb7eced 8531 .free_client = nfs4_free_client,
1179acc6
BS		 8532 .create_server = nfs4_create_server,
8533 .clone_server = nfs_clone_server,
1da177e4
LT		 8534};
8535
64c2ce8b
AK		 8536static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8537 .prefix = XATTR_NAME_NFSV4_ACL,
8538 .list = nfs4_xattr_list_nfs4_acl,
8539 .get = nfs4_xattr_get_nfs4_acl,
8540 .set = nfs4_xattr_set_nfs4_acl,
8541};
8542
8543const struct xattr_handler *nfs4_xattr_handlers[] = {
8544 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8545#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8546 &nfs4_xattr_nfs4_label_handler,
8547#endif
64c2ce8b
AK		 8548 NULL
8549};
8550
1da177e4
LT		 8551/*
8552 * Local variables:
8553 * c-basic-offset: 8
8554 * End:
8555 */
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