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NFS: SEEK is an NFS v4.2 feature
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4 68
c6d01c6f
TM		 69#include "nfs4trace.h"
70
1da177e4
LT		 71#define NFSDBG_FACILITY NFSDBG_PROC
72
2066fe89 73#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 74#define NFS4_POLL_RETRY_MAX (15*HZ)
75
cdd4e68b 76struct nfs4_opendata;
864472e9 77static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 78static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 79static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
8478eaa1 80static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *, long *);
81934ddb 81static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 82static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
83static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 84static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 86 struct nfs4_state *state, struct nfs4_label *ilabel,
87 struct nfs4_label *olabel);
f062eb6c 88#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 89static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
90 struct rpc_cred *);
91static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
92 struct rpc_cred *);
f062eb6c 93#endif
aa9c2669
DQ		 94
95#ifdef CONFIG_NFS_V4_SECURITY_LABEL
96static inline struct nfs4_label *
97nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
98 struct iattr *sattr, struct nfs4_label *label)
99{
100 int err;
101
102 if (label == NULL)
103 return NULL;
104
105 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
106 return NULL;
107
aa9c2669
DQ		 108 err = security_dentry_init_security(dentry, sattr->ia_mode,
109 &dentry->d_name, (void **)&label->label, &label->len);
110 if (err == 0)
111 return label;
112
113 return NULL;
114}
115static inline void
116nfs4_label_release_security(struct nfs4_label *label)
117{
118 if (label)
119 security_release_secctx(label->label, label->len);
120}
121static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
122{
123 if (label)
124 return server->attr_bitmask;
125
126 return server->attr_bitmask_nl;
127}
128#else
129static inline struct nfs4_label *
130nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
131 struct iattr *sattr, struct nfs4_label *l)
132{ return NULL; }
133static inline void
134nfs4_label_release_security(struct nfs4_label *label)
135{ return; }
136static inline u32 *
137nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
138{ return server->attr_bitmask; }
139#endif
140
1da177e4 141/* Prevent leaks of NFSv4 errors into userland */
46f72f57 142static int nfs4_map_errors(int err)
1da177e4 143{
52567b03
TM		 144 if (err >= -1000)
145 return err;
146 switch (err) {
147 case -NFS4ERR_RESOURCE:
30005121
WAA		 148 case -NFS4ERR_LAYOUTTRYLATER:
149 case -NFS4ERR_RECALLCONFLICT:
52567b03 150 return -EREMOTEIO;
7ebb9315 151 case -NFS4ERR_WRONGSEC:
8897538e 152 case -NFS4ERR_WRONG_CRED:
7ebb9315 153 return -EPERM;
3ddeb7c5
TM		 154 case -NFS4ERR_BADOWNER:
155 case -NFS4ERR_BADNAME:
156 return -EINVAL;
fb13bfa7
TM		 157 case -NFS4ERR_SHARE_DENIED:
158 return -EACCES;
f25efd85
SD		 159 case -NFS4ERR_MINOR_VERS_MISMATCH:
160 return -EPROTONOSUPPORT;
6168f62c
WAA		 161 case -NFS4ERR_ACCESS:
162 return -EACCES;
6e3cf241
TM		 163 case -NFS4ERR_FILE_OPEN:
164 return -EBUSY;
52567b03 165 default:
1da177e4 166 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 167 __func__, -err);
52567b03 168 break;
1da177e4 169 }
52567b03 170 return -EIO;
1da177e4
LT		 171}
172
173/*
174 * This is our standard bitmap for GETATTR requests.
175 */
1549210f 176const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 177 FATTR4_WORD0_TYPE
178 | FATTR4_WORD0_CHANGE
179 | FATTR4_WORD0_SIZE
180 | FATTR4_WORD0_FSID
181 | FATTR4_WORD0_FILEID,
182 FATTR4_WORD1_MODE
183 | FATTR4_WORD1_NUMLINKS
184 | FATTR4_WORD1_OWNER
185 | FATTR4_WORD1_OWNER_GROUP
186 | FATTR4_WORD1_RAWDEV
187 | FATTR4_WORD1_SPACE_USED
188 | FATTR4_WORD1_TIME_ACCESS
189 | FATTR4_WORD1_TIME_METADATA
aa9c2669
DQ		 190 | FATTR4_WORD1_TIME_MODIFY,
191#ifdef CONFIG_NFS_V4_SECURITY_LABEL
192 FATTR4_WORD2_SECURITY_LABEL
193#endif
1da177e4
LT		 194};
195
1549210f
TM		 196static const u32 nfs4_pnfs_open_bitmap[3] = {
197 FATTR4_WORD0_TYPE
198 | FATTR4_WORD0_CHANGE
199 | FATTR4_WORD0_SIZE
200 | FATTR4_WORD0_FSID
201 | FATTR4_WORD0_FILEID,
202 FATTR4_WORD1_MODE
203 | FATTR4_WORD1_NUMLINKS
204 | FATTR4_WORD1_OWNER
205 | FATTR4_WORD1_OWNER_GROUP
206 | FATTR4_WORD1_RAWDEV
207 | FATTR4_WORD1_SPACE_USED
208 | FATTR4_WORD1_TIME_ACCESS
209 | FATTR4_WORD1_TIME_METADATA
210 | FATTR4_WORD1_TIME_MODIFY,
211 FATTR4_WORD2_MDSTHRESHOLD
212};
213
e23008ec
AA		 214static const u32 nfs4_open_noattr_bitmap[3] = {
215 FATTR4_WORD0_TYPE
216 | FATTR4_WORD0_CHANGE
217 | FATTR4_WORD0_FILEID,
218};
219
a09df2ca 220const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 221 FATTR4_WORD0_FILES_AVAIL
222 | FATTR4_WORD0_FILES_FREE
223 | FATTR4_WORD0_FILES_TOTAL,
224 FATTR4_WORD1_SPACE_AVAIL
225 | FATTR4_WORD1_SPACE_FREE
226 | FATTR4_WORD1_SPACE_TOTAL
227};
228
a09df2ca 229const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 230 FATTR4_WORD0_MAXLINK
231 | FATTR4_WORD0_MAXNAME,
232 0
233};
234
dae100c2 235const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 236 | FATTR4_WORD0_MAXREAD
237 | FATTR4_WORD0_MAXWRITE
238 | FATTR4_WORD0_LEASE_TIME,
55b6e774 239 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 240 | FATTR4_WORD1_FS_LAYOUT_TYPES,
241 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 242};
243
a09df2ca 244const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 245 FATTR4_WORD0_TYPE
246 | FATTR4_WORD0_CHANGE
247 | FATTR4_WORD0_SIZE
248 | FATTR4_WORD0_FSID
249 | FATTR4_WORD0_FILEID
250 | FATTR4_WORD0_FS_LOCATIONS,
251 FATTR4_WORD1_MODE
252 | FATTR4_WORD1_NUMLINKS
253 | FATTR4_WORD1_OWNER
254 | FATTR4_WORD1_OWNER_GROUP
255 | FATTR4_WORD1_RAWDEV
256 | FATTR4_WORD1_SPACE_USED
257 | FATTR4_WORD1_TIME_ACCESS
258 | FATTR4_WORD1_TIME_METADATA
259 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 260 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 261};
262
bc4785cd 263static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 264 struct nfs4_readdir_arg *readdir)
265{
0dbb4c67 266 __be32 *start, *p;
1da177e4 267
1da177e4 268 if (cookie > 2) {
b7ef1956 269 readdir->cookie = cookie;
1da177e4
LT		 270 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
271 return;
272 }
273
274 readdir->cookie = 0;
275 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
276 if (cookie == 2)
277 return;
278
279 /*
280 * NFSv4 servers do not return entries for '.' and '..'
281 * Therefore, we fake these entries here. We let '.'
282 * have cookie 0 and '..' have cookie 1. Note that
283 * when talking to the server, we always send cookie 0
284 * instead of 1 or 2.
285 */
2b86ce2d 286 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 287
288 if (cookie == 0) {
289 *p++ = xdr_one; /* next */
290 *p++ = xdr_zero; /* cookie, first word */
291 *p++ = xdr_one; /* cookie, second word */
292 *p++ = xdr_one; /* entry len */
293 memcpy(p, ".\0\0\0", 4); /* entry */
294 p++;
295 *p++ = xdr_one; /* bitmap length */
296 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
297 *p++ = htonl(8); /* attribute buffer length */
4e769b93 298 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 299 }
300
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_two; /* cookie, second word */
304 *p++ = xdr_two; /* entry len */
305 memcpy(p, "..\0\0", 4); /* entry */
306 p++;
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
4e769b93 310 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 311
312 readdir->pgbase = (char *)p - (char *)start;
313 readdir->count -= readdir->pgbase;
2b86ce2d 314 kunmap_atomic(start);
1da177e4
LT		 315}
316
8478eaa1
N		 317static long nfs4_update_delay(long *timeout)
318{
319 long ret;
320 if (!timeout)
321 return NFS4_POLL_RETRY_MAX;
322 if (*timeout <= 0)
323 *timeout = NFS4_POLL_RETRY_MIN;
324 if (*timeout > NFS4_POLL_RETRY_MAX)
325 *timeout = NFS4_POLL_RETRY_MAX;
326 ret = *timeout;
327 *timeout <<= 1;
328 return ret;
329}
330
65de872e
TM		 331static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
332{
333 int res = 0;
334
335 might_sleep();
336
8478eaa1
N		 337 freezable_schedule_timeout_killable_unsafe(
338 nfs4_update_delay(timeout));
65de872e
TM		 339 if (fatal_signal_pending(current))
340 res = -ERESTARTSYS;
65de872e
TM		 341 return res;
342}
343
344/* This is the error handling routine for processes that are allowed
345 * to sleep.
346 */
b064eca2 347static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 348{
349 struct nfs_client *clp = server->nfs_client;
9e33bed5 350 struct nfs4_state *state = exception->state;
3114ea7a 351 struct inode *inode = exception->inode;
65de872e
TM		 352 int ret = errorcode;
353
354 exception->retry = 0;
355 switch(errorcode) {
356 case 0:
357 return 0;
3114ea7a 358 case -NFS4ERR_OPENMODE:
011e2a7f 359 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 360 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 361 exception->retry = 1;
362 return 0;
363 }
364 if (state == NULL)
365 break;
5d422301
TM		 366 ret = nfs4_schedule_stateid_recovery(server, state);
367 if (ret < 0)
368 break;
3114ea7a 369 goto wait_on_recovery;
a1d0b5ee 370 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 371 case -NFS4ERR_ADMIN_REVOKED:
372 case -NFS4ERR_BAD_STATEID:
b570a975
TM		 373 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
374 nfs_remove_bad_delegation(inode);
375 exception->retry = 1;
376 break;
377 }
9e33bed5
TM		 378 if (state == NULL)
379 break;
5d422301
TM		 380 ret = nfs4_schedule_stateid_recovery(server, state);
381 if (ret < 0)
382 break;
0400a6b0 383 goto wait_on_recovery;
0ced63d1 384 case -NFS4ERR_EXPIRED:
5d422301
TM		 385 if (state != NULL) {
386 ret = nfs4_schedule_stateid_recovery(server, state);
387 if (ret < 0)
388 break;
389 }
65de872e 390 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 391 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 392 nfs4_schedule_lease_recovery(clp);
393 goto wait_on_recovery;
519ae255
CL		 394 case -NFS4ERR_MOVED:
395 ret = nfs4_schedule_migration_recovery(server);
396 if (ret < 0)
397 break;
398 goto wait_on_recovery;
8ef2f8d4
CL		 399 case -NFS4ERR_LEASE_MOVED:
400 nfs4_schedule_lease_moved_recovery(clp);
401 goto wait_on_recovery;
03391693 402#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 403 case -NFS4ERR_BADSESSION:
404 case -NFS4ERR_BADSLOT:
405 case -NFS4ERR_BAD_HIGH_SLOT:
406 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
407 case -NFS4ERR_DEADSESSION:
408 case -NFS4ERR_SEQ_FALSE_RETRY:
409 case -NFS4ERR_SEQ_MISORDERED:
410 dprintk("%s ERROR: %d Reset session\n", __func__,
411 errorcode);
9f594791 412 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 413 goto wait_on_recovery;
03391693 414#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 415 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 416 if (exception->timeout > HZ) {
417 /* We have retried a decent amount, time to
418 * fail
419 */
420 ret = -EBUSY;
421 break;
422 }
65de872e
TM		 423 case -NFS4ERR_GRACE:
424 case -NFS4ERR_DELAY:
425 ret = nfs4_delay(server->client, &exception->timeout);
426 if (ret != 0)
427 break;
a8a4ae3a 428 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 429 case -NFS4ERR_OLD_STATEID:
430 exception->retry = 1;
b064eca2
TM		 431 break;
432 case -NFS4ERR_BADOWNER:
433 /* The following works around a Linux server bug! */
434 case -NFS4ERR_BADNAME:
435 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
436 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
437 exception->retry = 1;
438 printk(KERN_WARNING "NFS: v4 server %s "
439 "does not accept raw "
440 "uid/gids. "
441 "Reenabling the idmapper.\n",
442 server->nfs_client->cl_hostname);
443 }
65de872e
TM		 444 }
445 /* We failed to handle the error */
446 return nfs4_map_errors(ret);
0400a6b0 447wait_on_recovery:
a2c0b9e2 448 ret = nfs4_wait_clnt_recover(clp);
519ae255
CL		 449 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
450 return -EIO;
a2c0b9e2
TM		 451 if (ret == 0)
452 exception->retry = 1;
453 return ret;
65de872e
TM		 454}
455
a5250def
WAA		 456/*
457 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
458 * or 'false' otherwise.
459 */
460static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
461{
462 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
463
464 if (flavor == RPC_AUTH_GSS_KRB5I ||
465 flavor == RPC_AUTH_GSS_KRB5P)
466 return true;
467
468 return false;
469}
65de872e 470
452e9352 471static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 472{
1da177e4
LT		 473 spin_lock(&clp->cl_lock);
474 if (time_before(clp->cl_last_renewal,timestamp))
475 clp->cl_last_renewal = timestamp;
476 spin_unlock(&clp->cl_lock);
477}
478
452e9352
TM		 479static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
480{
481 do_renew_lease(server->nfs_client, timestamp);
482}
483
2a3eb2b9
CL		 484struct nfs4_call_sync_data {
485 const struct nfs_server *seq_server;
486 struct nfs4_sequence_args *seq_args;
487 struct nfs4_sequence_res *seq_res;
488};
489
a9c92d6b
CL		 490static void nfs4_init_sequence(struct nfs4_sequence_args *args,
491 struct nfs4_sequence_res *res, int cache_reply)
492{
493 args->sa_slot = NULL;
494 args->sa_cache_this = cache_reply;
495 args->sa_privileged = 0;
496
497 res->sr_slot = NULL;
498}
499
500static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
501{
502 args->sa_privileged = 1;
503}
504
3bd2384a
CL		 505static int nfs40_setup_sequence(const struct nfs_server *server,
506 struct nfs4_sequence_args *args,
507 struct nfs4_sequence_res *res,
508 struct rpc_task *task)
509{
510 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
511 struct nfs4_slot *slot;
512
513 /* slot already allocated? */
514 if (res->sr_slot != NULL)
515 goto out_start;
516
517 spin_lock(&tbl->slot_tbl_lock);
518 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
519 goto out_sleep;
520
521 slot = nfs4_alloc_slot(tbl);
522 if (IS_ERR(slot)) {
523 if (slot == ERR_PTR(-ENOMEM))
524 task->tk_timeout = HZ >> 2;
525 goto out_sleep;
526 }
527 spin_unlock(&tbl->slot_tbl_lock);
528
529 args->sa_slot = slot;
530 res->sr_slot = slot;
531
532out_start:
533 rpc_call_start(task);
534 return 0;
535
536out_sleep:
537 if (args->sa_privileged)
538 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
539 NULL, RPC_PRIORITY_PRIVILEGED);
540 else
541 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
542 spin_unlock(&tbl->slot_tbl_lock);
543 return -EAGAIN;
544}
545
546static int nfs40_sequence_done(struct rpc_task *task,
547 struct nfs4_sequence_res *res)
548{
549 struct nfs4_slot *slot = res->sr_slot;
550 struct nfs4_slot_table *tbl;
551
cab92c19 552 if (slot == NULL)
3bd2384a
CL		 553 goto out;
554
555 tbl = slot->table;
556 spin_lock(&tbl->slot_tbl_lock);
557 if (!nfs41_wake_and_assign_slot(tbl, slot))
558 nfs4_free_slot(tbl, slot);
559 spin_unlock(&tbl->slot_tbl_lock);
560
561 res->sr_slot = NULL;
562out:
563 return 1;
564}
565
cccef3b9
AA		 566#if defined(CONFIG_NFS_V4_1)
567
d185a334 568static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 569{
e3725ec0 570 struct nfs4_session *session;
13615871 571 struct nfs4_slot_table *tbl;
a13ce7c6 572 struct nfs4_slot *slot = res->sr_slot;
c10e4498 573 bool send_new_highest_used_slotid = false;
13615871 574
a13ce7c6 575 tbl = slot->table;
e3725ec0 576 session = tbl->session;
ea028ac9 577
35dc1d74 578 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 579 /* Be nice to the server: try to ensure that the last transmitted
580 * value for highest_user_slotid <= target_highest_slotid
581 */
582 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
583 send_new_highest_used_slotid = true;
584
a13ce7c6 585 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 586 send_new_highest_used_slotid = false;
587 goto out_unlock;
588 }
a13ce7c6 589 nfs4_free_slot(tbl, slot);
c10e4498
TM		 590
591 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
592 send_new_highest_used_slotid = false;
b75ad4cd 593out_unlock:
35dc1d74 594 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 595 res->sr_slot = NULL;
c10e4498
TM		 596 if (send_new_highest_used_slotid)
597 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 598}
599
f9c96fcc 600int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 601{
e3725ec0 602 struct nfs4_session *session;
a13ce7c6 603 struct nfs4_slot *slot = res->sr_slot;
14516c3a 604 struct nfs_client *clp;
ac20d163 605 bool interrupted = false;
85563073 606 int ret = 1;
b0df806c 607
a13ce7c6
TM		 608 if (slot == NULL)
609 goto out_noaction;
468f8613
BS		 610 /* don't increment the sequence number if the task wasn't sent */
611 if (!RPC_WAS_SENT(task))
b0df806c
AA		 612 goto out;
613
e3725ec0 614 session = slot->table->session;
933602e3 615
ac20d163
TM		 616 if (slot->interrupted) {
617 slot->interrupted = 0;
618 interrupted = true;
619 }
620
2f92ae34 621 trace_nfs4_sequence_done(session, res);
691daf3b 622 /* Check the SEQUENCE operation status */
14516c3a
TM		 623 switch (res->sr_status) {
624 case 0:
b0df806c 625 /* Update the slot's sequence and clientid lease timer */
933602e3 626 ++slot->seq_nr;
e3725ec0 627 clp = session->clp;
8e63b6a8 628 do_renew_lease(clp, res->sr_timestamp);
0629e370 629 /* Check sequence flags */
b4410c2f
TM		 630 if (res->sr_status_flags != 0)
631 nfs4_schedule_lease_recovery(clp);
464ee9f9 632 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 633 break;
ac20d163
TM		 634 case 1:
635 /*
636 * sr_status remains 1 if an RPC level error occurred.
637 * The server may or may not have processed the sequence
638 * operation..
639 * Mark the slot as having hosted an interrupted RPC call.
640 */
641 slot->interrupted = 1;
642 goto out;
14516c3a
TM		 643 case -NFS4ERR_DELAY:
644 /* The server detected a resend of the RPC call and
645 * returned NFS4ERR_DELAY as per Section 2.10.6.2
646 * of RFC5661.
647 */
df2fabff 648 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 649 __func__,
df2fabff 650 slot->slot_nr,
933602e3 651 slot->seq_nr);
14516c3a 652 goto out_retry;
85563073
TM		 653 case -NFS4ERR_BADSLOT:
654 /*
655 * The slot id we used was probably retired. Try again
656 * using a different slot id.
657 */
e8794440
TM		 658 goto retry_nowait;
659 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 660 /*
661 * Was the last operation on this sequence interrupted?
662 * If so, retry after bumping the sequence number.
663 */
664 if (interrupted) {
665 ++slot->seq_nr;
666 goto retry_nowait;
667 }
e8794440
TM		 668 /*
669 * Could this slot have been previously retired?
670 * If so, then the server may be expecting seq_nr = 1!
671 */
8e63b6a8
TM		 672 if (slot->seq_nr != 1) {
673 slot->seq_nr = 1;
674 goto retry_nowait;
675 }
676 break;
e8794440
TM		 677 case -NFS4ERR_SEQ_FALSE_RETRY:
678 ++slot->seq_nr;
679 goto retry_nowait;
14516c3a
TM		 680 default:
681 /* Just update the slot sequence no. */
933602e3 682 ++slot->seq_nr;
b0df806c
AA		 683 }
684out:
685 /* The session may be reset by one of the error handlers. */
686 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 687 nfs41_sequence_free_slot(res);
a13ce7c6 688out_noaction:
85563073 689 return ret;
e8794440
TM		 690retry_nowait:
691 if (rpc_restart_call_prepare(task)) {
692 task->tk_status = 0;
693 ret = 0;
694 }
695 goto out;
14516c3a 696out_retry:
d05dd4e9 697 if (!rpc_restart_call(task))
14516c3a
TM		 698 goto out;
699 rpc_delay(task, NFS4_POLL_RETRY_MAX);
700 return 0;
b0df806c 701}
f9c96fcc 702EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 703
14516c3a
TM		 704static int nfs4_sequence_done(struct rpc_task *task,
705 struct nfs4_sequence_res *res)
df896455 706{
e3725ec0 707 if (res->sr_slot == NULL)
14516c3a 708 return 1;
3bd2384a
CL		 709 if (!res->sr_slot->table->session)
710 return nfs40_sequence_done(task, res);
14516c3a 711 return nfs41_sequence_done(task, res);
df896455
TM		 712}
713
dc70d7b3 714int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 715 struct nfs4_sequence_args *args,
716 struct nfs4_sequence_res *res,
ce5039c1
AA		 717 struct rpc_task *task)
718{
fbcd4abc
AA		 719 struct nfs4_slot *slot;
720 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 721
722 dprintk("--> %s\n", __func__);
ce5039c1 723 /* slot already allocated? */
dfb4f309 724 if (res->sr_slot != NULL)
d9afbd1b 725 goto out_success;
ce5039c1 726
fbcd4abc
AA		 727 tbl = &session->fc_slot_table;
728
69d206b5
TM		 729 task->tk_timeout = 0;
730
fbcd4abc 731 spin_lock(&tbl->slot_tbl_lock);
774d5f14 732 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 733 !args->sa_privileged) {
0b1c8fc4 734 /* The state manager will wait until the slot table is empty */
0b1c8fc4 735 dprintk("%s session is draining\n", __func__);
7b939a3f 736 goto out_sleep;
689cf5c1
AB		 737 }
738
2dc03b7f 739 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 740 if (IS_ERR(slot)) {
741 /* If out of memory, try again in 1/4 second */
742 if (slot == ERR_PTR(-ENOMEM))
743 task->tk_timeout = HZ >> 2;
fbcd4abc 744 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 745 goto out_sleep;
fbcd4abc
AA		 746 }
747 spin_unlock(&tbl->slot_tbl_lock);
748
2b2fa717 749 args->sa_slot = slot;
fbcd4abc 750
e8d92382 751 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 752 slot->slot_nr, slot->seq_nr);
fbcd4abc 753
dfb4f309 754 res->sr_slot = slot;
8e63b6a8 755 res->sr_timestamp = jiffies;
2a6e26cd 756 res->sr_status_flags = 0;
fbcd4abc
AA		 757 /*
758 * sr_status is only set in decode_sequence, and so will remain
759 * set to 1 if an rpc level failure occurs.
760 */
761 res->sr_status = 1;
2f92ae34 762 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 763out_success:
764 rpc_call_start(task);
ce5039c1 765 return 0;
7b939a3f 766out_sleep:
8fe72bac
TM		 767 /* Privileged tasks are queued with top priority */
768 if (args->sa_privileged)
1e1093c7
TM		 769 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
770 NULL, RPC_PRIORITY_PRIVILEGED);
771 else
772 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 773 spin_unlock(&tbl->slot_tbl_lock);
774 return -EAGAIN;
ce5039c1 775}
dc70d7b3 776EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 777
5a580e0a
CL		 778static int nfs4_setup_sequence(const struct nfs_server *server,
779 struct nfs4_sequence_args *args,
780 struct nfs4_sequence_res *res,
781 struct rpc_task *task)
ce5039c1 782{
035168ab 783 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 784 int ret = 0;
785
3bd2384a
CL		 786 if (!session)
787 return nfs40_setup_sequence(server, args, res, task);
035168ab 788
e8d92382 789 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 790 __func__, session->clp, session, res->sr_slot ?
e8d92382 791 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 792
9d12b216 793 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 794
ce5039c1
AA		 795 dprintk("<-- %s status=%d\n", __func__, ret);
796 return ret;
797}
798
ce5039c1
AA		 799static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
800{
2a3eb2b9 801 struct nfs4_call_sync_data *data = calldata;
6ba7db34 802 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 803
035168ab
TM		 804 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
805
d9afbd1b 806 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 807}
808
69ab40c4
AA		 809static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
810{
2a3eb2b9 811 struct nfs4_call_sync_data *data = calldata;
69ab40c4 812
14516c3a 813 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 814}
815
17280175 816static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 817 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 818 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 819};
820
3bd2384a
CL		 821#else /* !CONFIG_NFS_V4_1 */
822
9915ea7e
CL		 823static int nfs4_setup_sequence(const struct nfs_server *server,
824 struct nfs4_sequence_args *args,
825 struct nfs4_sequence_res *res,
826 struct rpc_task *task)
827{
3bd2384a 828 return nfs40_setup_sequence(server, args, res, task);
9915ea7e
CL		 829}
830
831static int nfs4_sequence_done(struct rpc_task *task,
832 struct nfs4_sequence_res *res)
833{
3bd2384a 834 return nfs40_sequence_done(task, res);
9915ea7e 835}
3bd2384a
CL		 836
837#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 838
839static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
840{
841 struct nfs4_call_sync_data *data = calldata;
842 nfs4_setup_sequence(data->seq_server,
843 data->seq_args, data->seq_res, task);
844}
845
846static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
847{
848 struct nfs4_call_sync_data *data = calldata;
849 nfs4_sequence_done(task, data->seq_res);
850}
851
852static const struct rpc_call_ops nfs40_call_sync_ops = {
853 .rpc_call_prepare = nfs40_call_sync_prepare,
854 .rpc_call_done = nfs40_call_sync_done,
855};
856
7c513058
BS		 857static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
858 struct nfs_server *server,
ce5039c1
AA		 859 struct rpc_message *msg,
860 struct nfs4_sequence_args *args,
8fe72bac 861 struct nfs4_sequence_res *res)
ce5039c1
AA		 862{
863 int ret;
864 struct rpc_task *task;
9915ea7e 865 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 866 struct nfs4_call_sync_data data = {
035168ab 867 .seq_server = server,
ce5039c1
AA		 868 .seq_args = args,
869 .seq_res = res,
ce5039c1
AA		 870 };
871 struct rpc_task_setup task_setup = {
7c513058 872 .rpc_client = clnt,
ce5039c1 873 .rpc_message = msg,
9915ea7e 874 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 875 .callback_data = &data
876 };
877
ce5039c1
AA		 878 task = rpc_run_task(&task_setup);
879 if (IS_ERR(task))
880 ret = PTR_ERR(task);
881 else {
882 ret = task->tk_status;
883 rpc_put_task(task);
884 }
885 return ret;
886}
887
7c513058
BS		 888int nfs4_call_sync(struct rpc_clnt *clnt,
889 struct nfs_server *server,
e73b83f2
BS		 890 struct rpc_message *msg,
891 struct nfs4_sequence_args *args,
892 struct nfs4_sequence_res *res,
893 int cache_reply)
894{
a9c92d6b 895 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 896 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 897}
cccef3b9 898
38478b24 899static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 900{
38478b24 901 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 902
38478b24 903 spin_lock(&dir->i_lock);
359d7d1c 904 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 905 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 906 nfs_force_lookup_revalidate(dir);
a9a4a87a 907 dir->i_version = cinfo->after;
de242c0b 908 nfs_fscache_invalidate(dir);
38478b24 909 spin_unlock(&dir->i_lock);
1da177e4
LT		 910}
911
e56e0b78 912struct nfs4_opendata {
c6d00e63 913 struct kref kref;
e56e0b78
TM		 914 struct nfs_openargs o_arg;
915 struct nfs_openres o_res;
cdd4e68b
TM		 916 struct nfs_open_confirmargs c_arg;
917 struct nfs_open_confirmres c_res;
6926afd1
TM		 918 struct nfs4_string owner_name;
919 struct nfs4_string group_name;
e56e0b78 920 struct nfs_fattr f_attr;
1775fd3e 921 struct nfs4_label *f_label;
e56e0b78 922 struct dentry *dir;
82a2c1b7 923 struct dentry *dentry;
e56e0b78 924 struct nfs4_state_owner *owner;
aac00a8d 925 struct nfs4_state *state;
e56e0b78 926 struct iattr attrs;
26e976a8 927 unsigned long timestamp;
3e309914 928 unsigned int rpc_done : 1;
5bc2afc2 929 unsigned int file_created : 1;
bdeca1b7 930 unsigned int is_recover : 1;
24ac23ab
TM		 931 int rpc_status;
932 int cancelled;
e56e0b78
TM		 933};
934
49f9a0fa
TM		 935static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
936 int err, struct nfs4_exception *exception)
937{
938 if (err != -EINVAL)
939 return false;
940 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
941 return false;
942 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
943 exception->retry = 1;
944 return true;
945}
946
947static enum open_claim_type4
948nfs4_map_atomic_open_claim(struct nfs_server *server,
949 enum open_claim_type4 claim)
950{
951 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
952 return claim;
953 switch (claim) {
954 default:
955 return claim;
956 case NFS4_OPEN_CLAIM_FH:
957 return NFS4_OPEN_CLAIM_NULL;
958 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
959 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
960 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
961 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
962 }
963}
2ced46c2
TM		 964
965static void nfs4_init_opendata_res(struct nfs4_opendata *p)
966{
967 p->o_res.f_attr = &p->f_attr;
1775fd3e 968 p->o_res.f_label = p->f_label;
c1d51931
TM		 969 p->o_res.seqid = p->o_arg.seqid;
970 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 971 p->o_res.server = p->o_arg.server;
5f657530 972 p->o_res.access_request = p->o_arg.access;
2ced46c2 973 nfs_fattr_init(&p->f_attr);
6926afd1 974 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 975}
976
82a2c1b7 977static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 978 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 979 const struct iattr *attrs,
1775fd3e 980 struct nfs4_label *label,
4a1c0893 981 enum open_claim_type4 claim,
8535b2be 982 gfp_t gfp_mask)
e56e0b78 983{
82a2c1b7 984 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 985 struct inode *dir = parent->d_inode;
986 struct nfs_server *server = NFS_SERVER(dir);
987 struct nfs4_opendata *p;
988
8535b2be 989 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 990 if (p == NULL)
991 goto err;
14c43f76
DQ		 992
993 p->f_label = nfs4_label_alloc(server, gfp_mask);
994 if (IS_ERR(p->f_label))
995 goto err_free_p;
996
8535b2be 997 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 998 if (p->o_arg.seqid == NULL)
14c43f76 999 goto err_free_label;
82a2c1b7
AV		 1000 nfs_sb_active(dentry->d_sb);
1001 p->dentry = dget(dentry);
e56e0b78
TM		 1002 p->dir = parent;
1003 p->owner = sp;
1004 atomic_inc(&sp->so_count);
dc0b027d
TM		 1005 p->o_arg.open_flags = flags;
1006 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 1007 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1008 * will return permission denied for all bits until close */
1009 if (!(flags & O_EXCL)) {
1010 /* ask server to check for all possible rights as results
1011 * are cached */
1012 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1013 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1014 }
7539bbab 1015 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1016 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1017 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1018 p->o_arg.name = &dentry->d_name;
e56e0b78 1019 p->o_arg.server = server;
aa9c2669 1020 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1021 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1022 p->o_arg.label = label;
49f9a0fa
TM		 1023 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1024 switch (p->o_arg.claim) {
4a1c0893
TM		 1025 case NFS4_OPEN_CLAIM_NULL:
1026 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1027 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1028 p->o_arg.fh = NFS_FH(dir);
1029 break;
1030 case NFS4_OPEN_CLAIM_PREVIOUS:
1031 case NFS4_OPEN_CLAIM_FH:
1032 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1033 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1034 p->o_arg.fh = NFS_FH(dentry->d_inode);
1035 }
536e43d1 1036 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1037 __u32 verf[2];
d77d76ff 1038
e56e0b78
TM		 1039 p->o_arg.u.attrs = &p->attrs;
1040 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1041
1042 verf[0] = jiffies;
1043 verf[1] = current->pid;
1044 memcpy(p->o_arg.u.verifier.data, verf,
1045 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1046 }
cdd4e68b
TM		 1047 p->c_arg.fh = &p->o_res.fh;
1048 p->c_arg.stateid = &p->o_res.stateid;
1049 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1050 nfs4_init_opendata_res(p);
c6d00e63 1051 kref_init(&p->kref);
e56e0b78 1052 return p;
14c43f76
DQ		 1053
1054err_free_label:
1055 nfs4_label_free(p->f_label);
1056err_free_p:
e56e0b78
TM		 1057 kfree(p);
1058err:
1059 dput(parent);
1060 return NULL;
1061}
1062
c6d00e63 1063static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1064{
c6d00e63
TM		 1065 struct nfs4_opendata *p = container_of(kref,
1066 struct nfs4_opendata, kref);
82a2c1b7 1067 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1068
1069 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1070 if (p->state != NULL)
1071 nfs4_put_open_state(p->state);
c6d00e63 1072 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1073
1074 nfs4_label_free(p->f_label);
1075
c6d00e63 1076 dput(p->dir);
82a2c1b7
AV		 1077 dput(p->dentry);
1078 nfs_sb_deactive(sb);
6926afd1 1079 nfs_fattr_free_names(&p->f_attr);
e911b815 1080 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1081 kfree(p);
1082}
1083
1084static void nfs4_opendata_put(struct nfs4_opendata *p)
1085{
1086 if (p != NULL)
1087 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1088}
1089
06f814a3
TM		 1090static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1091{
06f814a3
TM		 1092 int ret;
1093
06f814a3 1094 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1095 return ret;
1096}
1097
dc0b027d 1098static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1099{
1100 int ret = 0;
dc0b027d 1101
536e43d1 1102 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1103 goto out;
1104 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1105 case FMODE_READ:
88069f77
TM		 1106 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1107 && state->n_rdonly != 0;
6ee41268
TM		 1108 break;
1109 case FMODE_WRITE:
88069f77
TM		 1110 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1111 && state->n_wronly != 0;
6ee41268
TM		 1112 break;
1113 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1114 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1115 && state->n_rdwr != 0;
6ee41268 1116 }
dc0b027d 1117out:
6ee41268
TM		 1118 return ret;
1119}
1120
dc0b027d 1121static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1122{
652f89f6
TM		 1123 if (delegation == NULL)
1124 return 0;
dc0b027d 1125 if ((delegation->type & fmode) != fmode)
aac00a8d 1126 return 0;
15c831bf 1127 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 1128 return 0;
d25be546
TM		 1129 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1130 return 0;
b7391f44 1131 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1132 return 1;
1133}
1134
dc0b027d 1135static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1136{
dc0b027d 1137 switch (fmode) {
e7616923
TM		 1138 case FMODE_WRITE:
1139 state->n_wronly++;
1140 break;
1141 case FMODE_READ:
1142 state->n_rdonly++;
1143 break;
1144 case FMODE_READ|FMODE_WRITE:
1145 state->n_rdwr++;
1146 }
dc0b027d 1147 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1148}
1149
4f14c194
TM		 1150static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1151{
1152 struct nfs_client *clp = state->owner->so_server->nfs_client;
1153 bool need_recover = false;
1154
1155 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1156 need_recover = true;
1157 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1158 need_recover = true;
1159 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1160 need_recover = true;
1161 if (need_recover)
1162 nfs4_state_mark_reclaim_nograce(clp, state);
1163}
1164
e999e80e
TM		 1165static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1166 nfs4_stateid *stateid)
1167{
1168 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1169 return true;
4f14c194
TM		 1170 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1171 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1172 return true;
4f14c194 1173 }
e999e80e
TM		 1174 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1175 return true;
1176 return false;
1177}
1178
226056c5
TM		 1179static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1180 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1181{
226056c5
TM		 1182 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1183 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1184 case FMODE_WRITE:
1185 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1186 break;
1187 case FMODE_READ:
1188 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1189 break;
1190 case 0:
1191 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1192 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1193 clear_bit(NFS_OPEN_STATE, &state->flags);
1194 }
1195 if (stateid == NULL)
1196 return;
1197 if (!nfs_need_update_open_stateid(state, stateid))
1198 return;
003707c7 1199 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1200 nfs4_stateid_copy(&state->stateid, stateid);
1201 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1202}
1203
1204static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1205{
1206 write_seqlock(&state->seqlock);
1207 nfs_clear_open_stateid_locked(state, stateid, fmode);
1208 write_sequnlock(&state->seqlock);
4f14c194
TM		 1209 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1210 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1211}
1212
dc0b027d 1213static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1214{
dc0b027d 1215 switch (fmode) {
003707c7
TM		 1216 case FMODE_READ:
1217 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1218 break;
1219 case FMODE_WRITE:
1220 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1221 break;
1222 case FMODE_READ|FMODE_WRITE:
1223 set_bit(NFS_O_RDWR_STATE, &state->flags);
1224 }
e999e80e
TM		 1225 if (!nfs_need_update_open_stateid(state, stateid))
1226 return;
1227 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1228 nfs4_stateid_copy(&state->stateid, stateid);
1229 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1230}
1231
dc0b027d 1232static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1233{
8bda4e4c
TM		 1234 /*
1235 * Protect the call to nfs4_state_set_mode_locked and
1236 * serialise the stateid update
1237 */
1238 write_seqlock(&state->seqlock);
003707c7 1239 if (deleg_stateid != NULL) {
f597c537 1240 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1241 set_bit(NFS_DELEGATED_STATE, &state->flags);
1242 }
1243 if (open_stateid != NULL)
dc0b027d 1244 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1245 write_sequnlock(&state->seqlock);
1246 spin_lock(&state->owner->so_lock);
dc0b027d 1247 update_open_stateflags(state, fmode);
ec073428 1248 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1249}
1250
dc0b027d 1251static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1252{
1253 struct nfs_inode *nfsi = NFS_I(state->inode);
1254 struct nfs_delegation *deleg_cur;
1255 int ret = 0;
1256
dc0b027d 1257 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1258
1259 rcu_read_lock();
1260 deleg_cur = rcu_dereference(nfsi->delegation);
1261 if (deleg_cur == NULL)
1262 goto no_delegation;
1263
1264 spin_lock(&deleg_cur->lock);
17f26b12 1265 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1266 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1267 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1268 goto no_delegation_unlock;
1269
1270 if (delegation == NULL)
1271 delegation = &deleg_cur->stateid;
f597c537 1272 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1273 goto no_delegation_unlock;
1274
b7391f44 1275 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1276 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1277 ret = 1;
1278no_delegation_unlock:
1279 spin_unlock(&deleg_cur->lock);
1280no_delegation:
1281 rcu_read_unlock();
1282
1283 if (!ret && open_stateid != NULL) {
dc0b027d 1284 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1285 ret = 1;
1286 }
4f14c194
TM		 1287 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1288 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1289
1290 return ret;
1291}
1292
1293
dc0b027d 1294static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1295{
1296 struct nfs_delegation *delegation;
1297
1298 rcu_read_lock();
1299 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1300 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1301 rcu_read_unlock();
1302 return;
1303 }
1304 rcu_read_unlock();
57ec14c5 1305 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1306}
1307
6ee41268 1308static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1309{
1310 struct nfs4_state *state = opendata->state;
1311 struct nfs_inode *nfsi = NFS_I(state->inode);
1312 struct nfs_delegation *delegation;
f448badd 1313 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1314 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1315 nfs4_stateid stateid;
1316 int ret = -EAGAIN;
1317
aac00a8d 1318 for (;;) {
61beef75 1319 spin_lock(&state->owner->so_lock);
dc0b027d 1320 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1321 update_open_stateflags(state, fmode);
6ee41268 1322 spin_unlock(&state->owner->so_lock);
61beef75 1323 goto out_return_state;
6ee41268 1324 }
61beef75 1325 spin_unlock(&state->owner->so_lock);
34310430
TM		 1326 rcu_read_lock();
1327 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1328 if (!can_open_delegated(delegation, fmode)) {
34310430 1329 rcu_read_unlock();
aac00a8d 1330 break;
34310430 1331 }
aac00a8d 1332 /* Save the delegation */
f597c537 1333 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1334 rcu_read_unlock();
fa332941 1335 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1336 if (!opendata->is_recover) {
1337 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1338 if (ret != 0)
1339 goto out;
1340 }
aac00a8d 1341 ret = -EAGAIN;
34310430
TM		 1342
1343 /* Try to update the stateid using the delegation */
dc0b027d 1344 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1345 goto out_return_state;
aac00a8d 1346 }
aac00a8d
TM		 1347out:
1348 return ERR_PTR(ret);
1349out_return_state:
1350 atomic_inc(&state->count);
1351 return state;
1352}
1353
e23008ec
AA		 1354static void
1355nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1356{
1357 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1358 struct nfs_delegation *delegation;
1359 int delegation_flags = 0;
1360
1361 rcu_read_lock();
1362 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1363 if (delegation)
1364 delegation_flags = delegation->flags;
1365 rcu_read_unlock();
1366 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1367 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1368 "returning a delegation for "
1369 "OPEN(CLAIM_DELEGATE_CUR)\n",
1370 clp->cl_hostname);
1371 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1372 nfs_inode_set_delegation(state->inode,
1373 data->owner->so_cred,
1374 &data->o_res);
1375 else
1376 nfs_inode_reclaim_delegation(state->inode,
1377 data->owner->so_cred,
1378 &data->o_res);
1379}
1380
1381/*
1382 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1383 * and update the nfs4_state.
1384 */
1385static struct nfs4_state *
1386_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1387{
1388 struct inode *inode = data->state->inode;
1389 struct nfs4_state *state = data->state;
1390 int ret;
1391
d2bfda2e
WAA		 1392 if (!data->rpc_done) {
1393 if (data->rpc_status) {
1394 ret = data->rpc_status;
1395 goto err;
1396 }
1397 /* cached opens have already been processed */
1398 goto update;
e23008ec
AA		 1399 }
1400
e23008ec
AA		 1401 ret = nfs_refresh_inode(inode, &data->f_attr);
1402 if (ret)
1403 goto err;
1404
1405 if (data->o_res.delegation_type != 0)
1406 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1407update:
e23008ec
AA		 1408 update_open_stateid(state, &data->o_res.stateid, NULL,
1409 data->o_arg.fmode);
d49f042a 1410 atomic_inc(&state->count);
e23008ec
AA		 1411
1412 return state;
1413err:
1414 return ERR_PTR(ret);
1415
1416}
1417
1418static struct nfs4_state *
1419_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1420{
1421 struct inode *inode;
1422 struct nfs4_state *state = NULL;
1b370bc2 1423 int ret;
24ac23ab 1424
aac00a8d 1425 if (!data->rpc_done) {
6ee41268 1426 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1427 goto out;
1428 }
1429
1b370bc2 1430 ret = -EAGAIN;
24ac23ab 1431 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1432 goto err;
1775fd3e 1433 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1434 ret = PTR_ERR(inode);
03f28e3a 1435 if (IS_ERR(inode))
1b370bc2
TM		 1436 goto err;
1437 ret = -ENOMEM;
24ac23ab
TM		 1438 state = nfs4_get_open_state(inode, data->owner);
1439 if (state == NULL)
1b370bc2 1440 goto err_put_inode;
e23008ec
AA		 1441 if (data->o_res.delegation_type != 0)
1442 nfs4_opendata_check_deleg(data, state);
34310430 1443 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1444 data->o_arg.fmode);
24ac23ab 1445 iput(inode);
aac00a8d 1446out:
7aa262b5 1447 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1448 return state;
1b370bc2
TM		 1449err_put_inode:
1450 iput(inode);
1451err:
1452 return ERR_PTR(ret);
24ac23ab
TM		 1453}
1454
e23008ec
AA		 1455static struct nfs4_state *
1456nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1457{
1458 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1459 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1460 return _nfs4_opendata_to_nfs4_state(data);
1461}
1462
864472e9
TM		 1463static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1464{
1465 struct nfs_inode *nfsi = NFS_I(state->inode);
1466 struct nfs_open_context *ctx;
1467
1468 spin_lock(&state->inode->i_lock);
1469 list_for_each_entry(ctx, &nfsi->open_files, list) {
1470 if (ctx->state != state)
1471 continue;
1472 get_nfs_open_context(ctx);
1473 spin_unlock(&state->inode->i_lock);
1474 return ctx;
1475 }
1476 spin_unlock(&state->inode->i_lock);
1477 return ERR_PTR(-ENOENT);
1478}
1479
4a1c0893
TM		 1480static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1481 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1482{
1483 struct nfs4_opendata *opendata;
1484
4a1c0893 1485 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1486 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1487 if (opendata == NULL)
1488 return ERR_PTR(-ENOMEM);
1489 opendata->state = state;
1490 atomic_inc(&state->count);
1491 return opendata;
1492}
1493
dc0b027d 1494static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1495{
2ced46c2 1496 struct nfs4_state *newstate;
864472e9
TM		 1497 int ret;
1498
dc0b027d
TM		 1499 opendata->o_arg.open_flags = 0;
1500 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1501 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1502 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1503 nfs4_init_opendata_res(opendata);
b257957e 1504 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1505 if (ret != 0)
1506 return ret;
2ced46c2 1507 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1508 if (IS_ERR(newstate))
1509 return PTR_ERR(newstate);
643168c2 1510 nfs4_close_state(newstate, fmode);
2ced46c2 1511 *res = newstate;
864472e9
TM		 1512 return 0;
1513}
1514
1515static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1516{
864472e9 1517 struct nfs4_state *newstate;
864472e9
TM		 1518 int ret;
1519
4f14c194
TM		 1520 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1521 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1522 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1523 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1524 /* memory barrier prior to reading state->n_* */
2ced46c2 1525 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1526 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1527 smp_rmb();
1528 if (state->n_rdwr != 0) {
2ced46c2 1529 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1530 if (ret != 0)
1531 return ret;
2ced46c2
TM		 1532 if (newstate != state)
1533 return -ESTALE;
864472e9
TM		 1534 }
1535 if (state->n_wronly != 0) {
2ced46c2 1536 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1537 if (ret != 0)
1538 return ret;
2ced46c2
TM		 1539 if (newstate != state)
1540 return -ESTALE;
864472e9
TM		 1541 }
1542 if (state->n_rdonly != 0) {
2ced46c2 1543 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1544 if (ret != 0)
1545 return ret;
2ced46c2
TM		 1546 if (newstate != state)
1547 return -ESTALE;
864472e9 1548 }
1ac7e2fd
TM		 1549 /*
1550 * We may have performed cached opens for all three recoveries.
1551 * Check if we need to update the current stateid.
1552 */
1553 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1554 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1555 write_seqlock(&state->seqlock);
1ac7e2fd 1556 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1557 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1558 write_sequnlock(&state->seqlock);
1ac7e2fd 1559 }
864472e9
TM		 1560 return 0;
1561}
1562
1da177e4
LT		 1563/*
1564 * OPEN_RECLAIM:
1565 * reclaim state on the server after a reboot.
1da177e4 1566 */
539cd03a 1567static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1568{
1ac7e2fd 1569 struct nfs_delegation *delegation;
864472e9 1570 struct nfs4_opendata *opendata;
dc0b027d 1571 fmode_t delegation_type = 0;
1da177e4
LT		 1572 int status;
1573
4a1c0893
TM		 1574 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1575 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1576 if (IS_ERR(opendata))
1577 return PTR_ERR(opendata);
1ac7e2fd
TM		 1578 rcu_read_lock();
1579 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1580 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1581 delegation_type = delegation->type;
1ac7e2fd 1582 rcu_read_unlock();
864472e9
TM		 1583 opendata->o_arg.u.delegation_type = delegation_type;
1584 status = nfs4_open_recover(opendata, state);
c6d00e63 1585 nfs4_opendata_put(opendata);
1da177e4
LT		 1586 return status;
1587}
1588
539cd03a 1589static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1590{
1591 struct nfs_server *server = NFS_SERVER(state->inode);
1592 struct nfs4_exception exception = { };
1593 int err;
1594 do {
539cd03a 1595 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1596 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1597 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1598 continue;
168667c4 1599 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1600 break;
1601 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1602 } while (exception.retry);
1603 return err;
1604}
1605
864472e9
TM		 1606static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1607{
1608 struct nfs_open_context *ctx;
1609 int ret;
1610
1611 ctx = nfs4_state_find_open_context(state);
1612 if (IS_ERR(ctx))
91876b13 1613 return -EAGAIN;
539cd03a 1614 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1615 put_nfs_open_context(ctx);
1616 return ret;
1617}
1618
db4f2e63 1619static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1620{
be76b5b6
TM		 1621 switch (err) {
1622 default:
1623 printk(KERN_ERR "NFS: %s: unhandled error "
1624 "%d.\n", __func__, err);
1625 case 0:
1626 case -ENOENT:
1627 case -ESTALE:
1628 break;
1629 case -NFS4ERR_BADSESSION:
1630 case -NFS4ERR_BADSLOT:
1631 case -NFS4ERR_BAD_HIGH_SLOT:
1632 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1633 case -NFS4ERR_DEADSESSION:
1634 set_bit(NFS_DELEGATED_STATE, &state->flags);
1635 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1636 return -EAGAIN;
1637 case -NFS4ERR_STALE_CLIENTID:
1638 case -NFS4ERR_STALE_STATEID:
1639 set_bit(NFS_DELEGATED_STATE, &state->flags);
1640 case -NFS4ERR_EXPIRED:
1641 /* Don't recall a delegation if it was lost */
1642 nfs4_schedule_lease_recovery(server->nfs_client);
1643 return -EAGAIN;
352297b9
CL		 1644 case -NFS4ERR_MOVED:
1645 nfs4_schedule_migration_recovery(server);
1646 return -EAGAIN;
8ef2f8d4
CL		 1647 case -NFS4ERR_LEASE_MOVED:
1648 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1649 return -EAGAIN;
be76b5b6
TM		 1650 case -NFS4ERR_DELEG_REVOKED:
1651 case -NFS4ERR_ADMIN_REVOKED:
1652 case -NFS4ERR_BAD_STATEID:
db4f2e63 1653 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1654 nfs_inode_find_state_and_recover(state->inode,
1655 stateid);
1656 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1657 return 0;
1658 case -NFS4ERR_DELAY:
1659 case -NFS4ERR_GRACE:
1660 set_bit(NFS_DELEGATED_STATE, &state->flags);
1661 ssleep(1);
1662 return -EAGAIN;
db4f2e63
TM		 1663 case -ENOMEM:
1664 case -NFS4ERR_DENIED:
1665 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1666 return 0;
be76b5b6 1667 }
1da177e4
LT		 1668 return err;
1669}
1670
db4f2e63
TM		 1671int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1672{
1673 struct nfs_server *server = NFS_SERVER(state->inode);
1674 struct nfs4_opendata *opendata;
1675 int err;
1676
1677 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1678 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1679 if (IS_ERR(opendata))
1680 return PTR_ERR(opendata);
1681 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1682 err = nfs4_open_recover(opendata, state);
1683 nfs4_opendata_put(opendata);
1684 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1685}
1686
be05c860
CL		 1687static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1688{
1689 struct nfs4_opendata *data = calldata;
1690
17ead6c8
TM		 1691 nfs40_setup_sequence(data->o_arg.server, &data->c_arg.seq_args,
1692 &data->c_res.seq_res, task);
be05c860
CL		 1693}
1694
cdd4e68b
TM		 1695static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1696{
1697 struct nfs4_opendata *data = calldata;
1698
17ead6c8 1699 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1700
cdd4e68b 1701 data->rpc_status = task->tk_status;
26e976a8 1702 if (data->rpc_status == 0) {
f597c537 1703 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1704 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1705 renew_lease(data->o_res.server, data->timestamp);
3e309914 1706 data->rpc_done = 1;
26e976a8 1707 }
cdd4e68b
TM		 1708}
1709
1710static void nfs4_open_confirm_release(void *calldata)
1711{
1712 struct nfs4_opendata *data = calldata;
1713 struct nfs4_state *state = NULL;
1714
1715 /* If this request hasn't been cancelled, do nothing */
1716 if (data->cancelled == 0)
1717 goto out_free;
1718 /* In case of error, no cleanup! */
3e309914 1719 if (!data->rpc_done)
cdd4e68b 1720 goto out_free;
cdd4e68b 1721 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1722 if (!IS_ERR(state))
643168c2 1723 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1724out_free:
c6d00e63 1725 nfs4_opendata_put(data);
cdd4e68b
TM		 1726}
1727
1728static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1729 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1730 .rpc_call_done = nfs4_open_confirm_done,
1731 .rpc_release = nfs4_open_confirm_release,
1732};
1733
1734/*
1735 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1736 */
1737static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1738{
1739 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1740 struct rpc_task *task;
5138fde0
TM		 1741 struct rpc_message msg = {
1742 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1743 .rpc_argp = &data->c_arg,
1744 .rpc_resp = &data->c_res,
1745 .rpc_cred = data->owner->so_cred,
1746 };
c970aa85
TM		 1747 struct rpc_task_setup task_setup_data = {
1748 .rpc_client = server->client,
5138fde0 1749 .rpc_message = &msg,
c970aa85
TM		 1750 .callback_ops = &nfs4_open_confirm_ops,
1751 .callback_data = data,
101070ca 1752 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1753 .flags = RPC_TASK_ASYNC,
1754 };
1da177e4
LT		 1755 int status;
1756
17ead6c8 1757 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1758 kref_get(&data->kref);
3e309914
TM		 1759 data->rpc_done = 0;
1760 data->rpc_status = 0;
5138fde0 1761 data->timestamp = jiffies;
c970aa85 1762 task = rpc_run_task(&task_setup_data);
7a1218a2 1763 if (IS_ERR(task))
cdd4e68b 1764 return PTR_ERR(task);
cdd4e68b
TM		 1765 status = nfs4_wait_for_completion_rpc_task(task);
1766 if (status != 0) {
1767 data->cancelled = 1;
1768 smp_wmb();
1769 } else
1770 status = data->rpc_status;
e6b3c4db 1771 rpc_put_task(task);
1da177e4
LT		 1772 return status;
1773}
1774
24ac23ab 1775static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1776{
24ac23ab
TM		 1777 struct nfs4_opendata *data = calldata;
1778 struct nfs4_state_owner *sp = data->owner;
549b19cc 1779 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1780
24ac23ab 1781 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1782 goto out_wait;
aac00a8d
TM		 1783 /*
1784 * Check if we still need to send an OPEN call, or if we can use
1785 * a delegation instead.
1786 */
1787 if (data->state != NULL) {
1788 struct nfs_delegation *delegation;
1789
dc0b027d 1790 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1791 goto out_no_action;
aac00a8d
TM		 1792 rcu_read_lock();
1793 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1794 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1795 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1796 can_open_delegated(delegation, data->o_arg.fmode))
1797 goto unlock_no_action;
aac00a8d
TM		 1798 rcu_read_unlock();
1799 }
95b72eb0 1800 /* Update client id. */
549b19cc 1801 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1802 switch (data->o_arg.claim) {
1803 case NFS4_OPEN_CLAIM_PREVIOUS:
1804 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1805 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1806 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1807 case NFS4_OPEN_CLAIM_FH:
1808 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1809 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1810 }
26e976a8 1811 data->timestamp = jiffies;
035168ab 1812 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1813 &data->o_arg.seq_args,
2240a9e2
TM		 1814 &data->o_res.seq_res,
1815 task) != 0)
1816 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1817
1818 /* Set the create mode (note dependency on the session type) */
1819 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1820 if (data->o_arg.open_flags & O_EXCL) {
1821 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1822 if (nfs4_has_persistent_session(clp))
1823 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1824 else if (clp->cl_mvops->minor_version > 0)
1825 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1826 }
6ee41268 1827 return;
652f89f6
TM		 1828unlock_no_action:
1829 rcu_read_unlock();
6ee41268
TM		 1830out_no_action:
1831 task->tk_action = NULL;
c8da19b9 1832out_wait:
b75ad4cd 1833 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1834}
1835
24ac23ab
TM		 1836static void nfs4_open_done(struct rpc_task *task, void *calldata)
1837{
1838 struct nfs4_opendata *data = calldata;
1da177e4 1839
24ac23ab 1840 data->rpc_status = task->tk_status;
d898528c 1841
14516c3a
TM		 1842 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1843 return;
d898528c 1844
24ac23ab 1845 if (task->tk_status == 0) {
807d66d8
TM		 1846 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1847 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1848 case S_IFREG:
1849 break;
1850 case S_IFLNK:
24ac23ab 1851 data->rpc_status = -ELOOP;
6f926b5b
TM		 1852 break;
1853 case S_IFDIR:
24ac23ab 1854 data->rpc_status = -EISDIR;
6f926b5b
TM		 1855 break;
1856 default:
24ac23ab 1857 data->rpc_status = -ENOTDIR;
807d66d8 1858 }
6f926b5b 1859 }
26e976a8 1860 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1861 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1862 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1863 }
3e309914 1864 data->rpc_done = 1;
24ac23ab 1865}
6f926b5b 1866
24ac23ab
TM		 1867static void nfs4_open_release(void *calldata)
1868{
1869 struct nfs4_opendata *data = calldata;
1870 struct nfs4_state *state = NULL;
1871
1872 /* If this request hasn't been cancelled, do nothing */
1873 if (data->cancelled == 0)
1874 goto out_free;
1875 /* In case of error, no cleanup! */
3e309914 1876 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1877 goto out_free;
1878 /* In case we need an open_confirm, no cleanup! */
1879 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1880 goto out_free;
24ac23ab 1881 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1882 if (!IS_ERR(state))
643168c2 1883 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1884out_free:
c6d00e63 1885 nfs4_opendata_put(data);
24ac23ab
TM		 1886}
1887
1888static const struct rpc_call_ops nfs4_open_ops = {
1889 .rpc_call_prepare = nfs4_open_prepare,
1890 .rpc_call_done = nfs4_open_done,
1891 .rpc_release = nfs4_open_release,
1892};
1893
b257957e 1894static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1895{
1896 struct inode *dir = data->dir->d_inode;
1897 struct nfs_server *server = NFS_SERVER(dir);
1898 struct nfs_openargs *o_arg = &data->o_arg;
1899 struct nfs_openres *o_res = &data->o_res;
1900 struct rpc_task *task;
5138fde0
TM		 1901 struct rpc_message msg = {
1902 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1903 .rpc_argp = o_arg,
1904 .rpc_resp = o_res,
1905 .rpc_cred = data->owner->so_cred,
1906 };
c970aa85
TM		 1907 struct rpc_task_setup task_setup_data = {
1908 .rpc_client = server->client,
5138fde0 1909 .rpc_message = &msg,
c970aa85
TM		 1910 .callback_ops = &nfs4_open_ops,
1911 .callback_data = data,
101070ca 1912 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1913 .flags = RPC_TASK_ASYNC,
1914 };
24ac23ab
TM		 1915 int status;
1916
a9c92d6b 1917 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1918 kref_get(&data->kref);
3e309914
TM		 1919 data->rpc_done = 0;
1920 data->rpc_status = 0;
2ced46c2 1921 data->cancelled = 0;
bdeca1b7
TM		 1922 data->is_recover = 0;
1923 if (isrecover) {
8fe72bac 1924 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1925 data->is_recover = 1;
1926 }
c970aa85 1927 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1928 if (IS_ERR(task))
1929 return PTR_ERR(task);
1930 status = nfs4_wait_for_completion_rpc_task(task);
1931 if (status != 0) {
1932 data->cancelled = 1;
1933 smp_wmb();
1934 } else
1935 status = data->rpc_status;
1936 rpc_put_task(task);
1937
1938 return status;
1939}
1940
1941static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1942{
1943 struct inode *dir = data->dir->d_inode;
1944 struct nfs_openres *o_res = &data->o_res;
1945 int status;
1946
1947 status = nfs4_run_open_task(data, 1);
1948 if (status != 0 || !data->rpc_done)
1949 return status;
1950
6926afd1
TM		 1951 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1952
b257957e
AB		 1953 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1954 status = _nfs4_proc_open_confirm(data);
1955 if (status != 0)
1956 return status;
1957 }
1958
1959 return status;
1960}
1961
f3792d63
TM		 1962/*
1963 * Additional permission checks in order to distinguish between an
1964 * open for read, and an open for execute. This works around the
1965 * fact that NFSv4 OPEN treats read and execute permissions as being
1966 * the same.
1967 * Note that in the non-execute case, we want to turn off permission
1968 * checking if we just created a new file (POSIX open() semantics).
1969 */
6168f62c
WAA		 1970static int nfs4_opendata_access(struct rpc_cred *cred,
1971 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1972 struct nfs4_state *state, fmode_t fmode,
1973 int openflags)
6168f62c
WAA		 1974{
1975 struct nfs_access_entry cache;
1976 u32 mask;
1977
1978 /* access call failed or for some reason the server doesn't
1979 * support any access modes -- defer access call until later */
1980 if (opendata->o_res.access_supported == 0)
1981 return 0;
1982
1983 mask = 0;
f3792d63
TM		 1984 /*
1985 * Use openflags to check for exec, because fmode won't
1986 * always have FMODE_EXEC set when file open for exec.
1987 */
f8d9a897
WAA		 1988 if (openflags & __FMODE_EXEC) {
1989 /* ONLY check for exec rights */
1990 mask = MAY_EXEC;
f3792d63 1991 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 1992 mask = MAY_READ;
6168f62c
WAA		 1993
1994 cache.cred = cred;
1995 cache.jiffies = jiffies;
1996 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1997 nfs_access_add_cache(state->inode, &cache);
1998
bbd3a8ee 1999 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2000 return 0;
2001
2002 /* even though OPEN succeeded, access is denied. Close the file */
2003 nfs4_close_state(state, fmode);
998f40b5 2004 return -EACCES;
6168f62c
WAA		 2005}
2006
b257957e
AB		 2007/*
2008 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2009 */
2010static int _nfs4_proc_open(struct nfs4_opendata *data)
2011{
2012 struct inode *dir = data->dir->d_inode;
2013 struct nfs_server *server = NFS_SERVER(dir);
2014 struct nfs_openargs *o_arg = &data->o_arg;
2015 struct nfs_openres *o_res = &data->o_res;
2016 int status;
2017
2018 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2019 if (!data->rpc_done)
2020 return status;
2021 if (status != 0) {
2022 if (status == -NFS4ERR_BADNAME &&
2023 !(o_arg->open_flags & O_CREAT))
2024 return -ENOENT;
24ac23ab 2025 return status;
08ef7bd3 2026 }
24ac23ab 2027
6926afd1
TM		 2028 nfs_fattr_map_and_free_names(server, &data->f_attr);
2029
5bc2afc2 2030 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2031 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2032 if (o_arg->open_flags & O_EXCL)
2033 data->file_created = 1;
2034 else if (o_res->cinfo.before != o_res->cinfo.after)
2035 data->file_created = 1;
2036 }
0df5dd4a
TM		 2037 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2038 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2039 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2040 status = _nfs4_proc_open_confirm(data);
1da177e4 2041 if (status != 0)
24ac23ab 2042 return status;
1da177e4
LT		 2043 }
2044 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2045 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2046 return 0;
1da177e4
LT		 2047}
2048
d83217c1
AA		 2049static int nfs4_recover_expired_lease(struct nfs_server *server)
2050{
2051 return nfs4_client_recover_expired_lease(server->nfs_client);
2052}
2053
1da177e4
LT		 2054/*
2055 * OPEN_EXPIRED:
2056 * reclaim state on the server after a network partition.
2057 * Assumes caller holds the appropriate lock
2058 */
539cd03a 2059static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2060{
e56e0b78 2061 struct nfs4_opendata *opendata;
864472e9 2062 int ret;
1da177e4 2063
4a1c0893 2064 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2065 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2066 if (IS_ERR(opendata))
2067 return PTR_ERR(opendata);
864472e9 2068 ret = nfs4_open_recover(opendata, state);
35d05778 2069 if (ret == -ESTALE)
3d4ff43d 2070 d_drop(ctx->dentry);
c6d00e63 2071 nfs4_opendata_put(opendata);
864472e9 2072 return ret;
1da177e4
LT		 2073}
2074
a9ed2e25 2075static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2076{
539cd03a 2077 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2078 struct nfs4_exception exception = { };
2079 int err;
2080
2081 do {
539cd03a 2082 err = _nfs4_open_expired(ctx, state);
42113a75 2083 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2084 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2085 continue;
a9ed2e25
TM		 2086 switch (err) {
2087 default:
2088 goto out;
2089 case -NFS4ERR_GRACE:
2090 case -NFS4ERR_DELAY:
2091 nfs4_handle_exception(server, err, &exception);
2092 err = 0;
2093 }
202b50dc 2094 } while (exception.retry);
a9ed2e25 2095out:
202b50dc
TM		 2096 return err;
2097}
2098
1da177e4
LT		 2099static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2100{
1da177e4 2101 struct nfs_open_context *ctx;
864472e9 2102 int ret;
1da177e4 2103
864472e9
TM		 2104 ctx = nfs4_state_find_open_context(state);
2105 if (IS_ERR(ctx))
91876b13 2106 return -EAGAIN;
539cd03a 2107 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2108 put_nfs_open_context(ctx);
2109 return ret;
1da177e4
LT		 2110}
2111
f062eb6c 2112#if defined(CONFIG_NFS_V4_1)
3e60ffdd 2113static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 2114{
f062eb6c 2115 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd 2116 nfs4_stateid *stateid = &state->stateid;
ab7cb0df
TM		 2117 struct nfs_delegation *delegation;
2118 struct rpc_cred *cred = NULL;
2119 int status = -NFS4ERR_BAD_STATEID;
3e60ffdd
CL		 2120
2121 /* If a state reset has been done, test_stateid is unneeded */
2122 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2123 return;
2124
ab7cb0df
TM		 2125 /* Get the delegation credential for use by test/free_stateid */
2126 rcu_read_lock();
2127 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2128 if (delegation != NULL &&
2129 nfs4_stateid_match(&delegation->stateid, stateid)) {
2130 cred = get_rpccred(delegation->cred);
2131 rcu_read_unlock();
2132 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2133 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df
TM		 2134 } else
2135 rcu_read_unlock();
2136
3e60ffdd
CL		 2137 if (status != NFS_OK) {
2138 /* Free the stateid unless the server explicitly
2139 * informs us the stateid is unrecognized. */
2140 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2141 nfs41_free_stateid(server, stateid, cred);
6938867e 2142 nfs_remove_bad_delegation(state->inode);
3e60ffdd 2143
6938867e
BS		 2144 write_seqlock(&state->seqlock);
2145 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2146 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 2147 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2148 }
ab7cb0df
TM		 2149
2150 if (cred != NULL)
2151 put_rpccred(cred);
3e60ffdd
CL		 2152}
2153
2154/**
2155 * nfs41_check_open_stateid - possibly free an open stateid
2156 *
2157 * @state: NFSv4 state for an inode
2158 *
2159 * Returns NFS_OK if recovery for this stateid is now finished.
2160 * Otherwise a negative NFS4ERR value is returned.
2161 */
2162static int nfs41_check_open_stateid(struct nfs4_state *state)
2163{
2164 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2165 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2166 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2167 int status;
2168
2169 /* If a state reset has been done, test_stateid is unneeded */
2170 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2171 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2172 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2173 return -NFS4ERR_BAD_STATEID;
2174
ab7cb0df 2175 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2176 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2177 if (status != NFS_OK) {
2178 /* Free the stateid unless the server explicitly
2179 * informs us the stateid is unrecognized. */
2180 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2181 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2182
2183 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2184 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2185 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2186 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2187 }
2188 return status;
2189}
2190
2191static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2192{
eb64cf96 2193 int status;
b01dd1d8 2194
3e60ffdd
CL		 2195 nfs41_clear_delegation_stateid(state);
2196 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2197 if (status != NFS_OK)
2198 status = nfs4_open_expired(sp, state);
2199 return status;
f062eb6c
BS		 2200}
2201#endif
2202
aa53ed54
JL		 2203/*
2204 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2205 * fields corresponding to attributes that were used to store the verifier.
2206 * Make sure we clobber those fields in the later setattr call
2207 */
2208static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2209{
2210 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2211 !(sattr->ia_valid & ATTR_ATIME_SET))
2212 sattr->ia_valid |= ATTR_ATIME;
2213
2214 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2215 !(sattr->ia_valid & ATTR_MTIME_SET))
2216 sattr->ia_valid |= ATTR_MTIME;
2217}
2218
c21443c2
TM		 2219static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2220 fmode_t fmode,
2221 int flags,
3efb9722 2222 struct nfs_open_context *ctx)
c21443c2
TM		 2223{
2224 struct nfs4_state_owner *sp = opendata->owner;
2225 struct nfs_server *server = sp->so_server;
275bb307 2226 struct dentry *dentry;
c21443c2
TM		 2227 struct nfs4_state *state;
2228 unsigned int seq;
2229 int ret;
2230
2231 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2232
2233 ret = _nfs4_proc_open(opendata);
dca78001 2234 if (ret != 0)
c21443c2
TM		 2235 goto out;
2236
2237 state = nfs4_opendata_to_nfs4_state(opendata);
2238 ret = PTR_ERR(state);
2239 if (IS_ERR(state))
2240 goto out;
2241 if (server->caps & NFS_CAP_POSIX_LOCK)
2242 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2243
275bb307
TM		 2244 dentry = opendata->dentry;
2245 if (dentry->d_inode == NULL) {
2246 /* FIXME: Is this d_drop() ever needed? */
2247 d_drop(dentry);
2248 dentry = d_add_unique(dentry, igrab(state->inode));
2249 if (dentry == NULL) {
2250 dentry = opendata->dentry;
2251 } else if (dentry != ctx->dentry) {
2252 dput(ctx->dentry);
2253 ctx->dentry = dget(dentry);
2254 }
2255 nfs_set_verifier(dentry,
2256 nfs_save_change_attribute(opendata->dir->d_inode));
2257 }
2258
c21443c2
TM		 2259 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2260 if (ret != 0)
2261 goto out;
2262
3efb9722 2263 ctx->state = state;
c45ffdd2
TM		 2264 if (dentry->d_inode == state->inode) {
2265 nfs_inode_attach_open_context(ctx);
2266 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2267 nfs4_schedule_stateid_recovery(server, state);
2268 }
c21443c2
TM		 2269out:
2270 return ret;
2271}
2272
1da177e4 2273/*
24ac23ab 2274 * Returns a referenced nfs4_state
1da177e4 2275 */
82be417a 2276static int _nfs4_do_open(struct inode *dir,
4197a055 2277 struct nfs_open_context *ctx,
82be417a
AA		 2278 int flags,
2279 struct iattr *sattr,
5bc2afc2
TM		 2280 struct nfs4_label *label,
2281 int *opened)
1da177e4
LT		 2282{
2283 struct nfs4_state_owner *sp;
2284 struct nfs4_state *state = NULL;
2285 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2286 struct nfs4_opendata *opendata;
4197a055
TM		 2287 struct dentry *dentry = ctx->dentry;
2288 struct rpc_cred *cred = ctx->cred;
2289 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2290 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2291 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2292 struct nfs4_label *olabel = NULL;
aac00a8d 2293 int status;
1da177e4
LT		 2294
2295 /* Protect against reboot recovery conflicts */
1da177e4 2296 status = -ENOMEM;
d1e284d5
TM		 2297 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2298 if (sp == NULL) {
1da177e4
LT		 2299 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2300 goto out_err;
2301 }
58d9714a
TM		 2302 status = nfs4_recover_expired_lease(server);
2303 if (status != 0)
b4454fe1 2304 goto err_put_state_owner;
82a2c1b7
AV		 2305 if (dentry->d_inode != NULL)
2306 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2307 status = -ENOMEM;
49f9a0fa
TM		 2308 if (dentry->d_inode)
2309 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2310 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2311 label, claim, GFP_KERNEL);
e56e0b78 2312 if (opendata == NULL)
95d35cb4 2313 goto err_put_state_owner;
1da177e4 2314
14c43f76
DQ		 2315 if (label) {
2316 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2317 if (IS_ERR(olabel)) {
2318 status = PTR_ERR(olabel);
2319 goto err_opendata_put;
2320 }
2321 }
2322
e911b815
TM		 2323 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2324 if (!opendata->f_attr.mdsthreshold) {
2325 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2326 if (!opendata->f_attr.mdsthreshold)
2327 goto err_free_label;
2328 }
1549210f 2329 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2330 }
82a2c1b7
AV		 2331 if (dentry->d_inode != NULL)
2332 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2333
3efb9722 2334 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2335 if (status != 0)
14c43f76 2336 goto err_free_label;
3efb9722 2337 state = ctx->state;
6168f62c 2338
549b19cc
TM		 2339 if ((opendata->o_arg.open_flags & O_EXCL) &&
2340 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2341 nfs4_exclusive_attrset(opendata, sattr);
2342
2343 nfs_fattr_init(opendata->o_res.f_attr);
2344 status = nfs4_do_setattr(state->inode, cred,
2345 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2346 state, label, olabel);
2347 if (status == 0) {
0ab64e0e 2348 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2349 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2350 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2351 }
0ab64e0e 2352 }
5bc2afc2
TM		 2353 if (opendata->file_created)
2354 *opened |= FILE_CREATED;
82be417a 2355
e911b815 2356 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2357 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2358 opendata->f_attr.mdsthreshold = NULL;
2359 }
82be417a 2360
14c43f76
DQ		 2361 nfs4_label_free(olabel);
2362
c6d00e63 2363 nfs4_opendata_put(opendata);
1da177e4 2364 nfs4_put_state_owner(sp);
1da177e4 2365 return 0;
14c43f76
DQ		 2366err_free_label:
2367 nfs4_label_free(olabel);
c6d00e63
TM		 2368err_opendata_put:
2369 nfs4_opendata_put(opendata);
e56e0b78
TM		 2370err_put_state_owner:
2371 nfs4_put_state_owner(sp);
1da177e4 2372out_err:
1da177e4
LT		 2373 return status;
2374}
2375
2376
82be417a 2377static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2378 struct nfs_open_context *ctx,
82be417a
AA		 2379 int flags,
2380 struct iattr *sattr,
5bc2afc2
TM		 2381 struct nfs4_label *label,
2382 int *opened)
1da177e4 2383{
49f9a0fa 2384 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2385 struct nfs4_exception exception = { };
2386 struct nfs4_state *res;
2387 int status;
2388
2389 do {
5bc2afc2 2390 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2391 res = ctx->state;
42113a75 2392 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2393 if (status == 0)
2394 break;
2395 /* NOTE: BAD_SEQID means the server and client disagree about the
2396 * book-keeping w.r.t. state-changing operations
2397 * (OPEN/CLOSE/LOCK/LOCKU...)
2398 * It is actually a sign of a bug on the client or on the server.
2399 *
2400 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2401 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2402 * have unhashed the old state_owner for us, and that we can
2403 * therefore safely retry using a new one. We should still warn
2404 * the user though...
2405 */
2406 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2407 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2408 " returned a bad sequence-id error!\n",
2409 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2410 exception.retry = 1;
2411 continue;
2412 }
550f5747
TM		 2413 /*
2414 * BAD_STATEID on OPEN means that the server cancelled our
2415 * state before it received the OPEN_CONFIRM.
2416 * Recover by retrying the request as per the discussion
2417 * on Page 181 of RFC3530.
2418 */
2419 if (status == -NFS4ERR_BAD_STATEID) {
2420 exception.retry = 1;
2421 continue;
2422 }
aac00a8d
TM		 2423 if (status == -EAGAIN) {
2424 /* We must have found a delegation */
2425 exception.retry = 1;
2426 continue;
2427 }
49f9a0fa
TM		 2428 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2429 continue;
2430 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2431 status, &exception));
2432 } while (exception.retry);
2433 return res;
2434}
2435
659bfcd6
TM		 2436static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2437 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2438 struct nfs4_state *state, struct nfs4_label *ilabel,
2439 struct nfs4_label *olabel)
1da177e4 2440{
3e4f6290 2441 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2442 struct nfs_setattrargs arg = {
3e4f6290 2443 .fh = NFS_FH(inode),
1da177e4
LT		 2444 .iap = sattr,
2445 .server = server,
2446 .bitmask = server->attr_bitmask,
1775fd3e 2447 .label = ilabel,
1da177e4
LT		 2448 };
2449 struct nfs_setattrres res = {
2450 .fattr = fattr,
1775fd3e 2451 .label = olabel,
1da177e4
LT		 2452 .server = server,
2453 };
2454 struct rpc_message msg = {
659bfcd6
TM		 2455 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2456 .rpc_argp = &arg,
2457 .rpc_resp = &res,
2458 .rpc_cred = cred,
1da177e4 2459 };
26e976a8 2460 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2461 fmode_t fmode;
2462 bool truncate;
65e4308d 2463 int status;
1da177e4 2464
aa9c2669
DQ		 2465 arg.bitmask = nfs4_bitmask(server, ilabel);
2466 if (ilabel)
2467 arg.bitmask = nfs4_bitmask(server, olabel);
2468
0e574af1 2469 nfs_fattr_init(fattr);
1da177e4 2470
ee3ae84e
TM		 2471 /* Servers should only apply open mode checks for file size changes */
2472 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2473 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2474
2475 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2476 /* Use that stateid */
0418dae1 2477 } else if (truncate && state != NULL) {
2a369153
TM		 2478 struct nfs_lockowner lockowner = {
2479 .l_owner = current->files,
2480 .l_pid = current->tgid,
2481 };
0418dae1
TM		 2482 if (!nfs4_valid_open_stateid(state))
2483 return -EBADF;
2484 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2485 &lockowner) == -EIO)
2486 return -EBADF;
08e9eac4 2487 } else
f597c537 2488 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2489
7c513058 2490 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2491 if (status == 0 && state != NULL)
2492 renew_lease(server, timestamp);
65e4308d 2493 return status;
1da177e4
LT		 2494}
2495
659bfcd6
TM		 2496static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2497 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2498 struct nfs4_state *state, struct nfs4_label *ilabel,
2499 struct nfs4_label *olabel)
1da177e4 2500{
3e4f6290 2501 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2502 struct nfs4_exception exception = {
2503 .state = state,
3114ea7a 2504 .inode = inode,
a1d0b5ee 2505 };
1da177e4
LT		 2506 int err;
2507 do {
1775fd3e 2508 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2509 trace_nfs4_setattr(inode, err);
451146be
TM		 2510 switch (err) {
2511 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2512 if (!(sattr->ia_valid & ATTR_SIZE)) {
2513 pr_warn_once("NFSv4: server %s is incorrectly "
2514 "applying open mode checks to "
2515 "a SETATTR that is not "
2516 "changing file size.\n",
2517 server->nfs_client->cl_hostname);
2518 }
451146be
TM		 2519 if (state && !(state->state & FMODE_WRITE)) {
2520 err = -EBADF;
2521 if (sattr->ia_valid & ATTR_OPEN)
2522 err = -EACCES;
2523 goto out;
2524 }
2525 }
2526 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2527 } while (exception.retry);
451146be 2528out:
1da177e4
LT		 2529 return err;
2530}
2531
2532struct nfs4_closedata {
2533 struct inode *inode;
2534 struct nfs4_state *state;
2535 struct nfs_closeargs arg;
2536 struct nfs_closeres res;
516a6af6 2537 struct nfs_fattr fattr;
26e976a8 2538 unsigned long timestamp;
f7e8917a
FI		 2539 bool roc;
2540 u32 roc_barrier;
1da177e4
LT		 2541};
2542
963d8fe5 2543static void nfs4_free_closedata(void *data)
9512135d 2544{
963d8fe5
TM		 2545 struct nfs4_closedata *calldata = data;
2546 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2547 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2548
f7e8917a
FI		 2549 if (calldata->roc)
2550 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2551 nfs4_put_open_state(calldata->state);
2552 nfs_free_seqid(calldata->arg.seqid);
9512135d 2553 nfs4_put_state_owner(sp);
322b2b90 2554 nfs_sb_deactive(sb);
9512135d
TM		 2555 kfree(calldata);
2556}
2557
963d8fe5 2558static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2559{
963d8fe5 2560 struct nfs4_closedata *calldata = data;
1da177e4 2561 struct nfs4_state *state = calldata->state;
1da177e4 2562 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2563 nfs4_stateid *res_stateid = NULL;
1da177e4 2564
a3ca5651 2565 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2566 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2567 return;
42113a75 2568 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2569 /* hmm. we are done with the inode, and in the process of freeing
2570 * the state_owner. we keep this around to process errors
2571 */
1da177e4
LT		 2572 switch (task->tk_status) {
2573 case 0:
412f6c4c
TM		 2574 res_stateid = &calldata->res.stateid;
2575 if (calldata->arg.fmode == 0 && calldata->roc)
f7e8917a
FI		 2576 pnfs_roc_set_barrier(state->inode,
2577 calldata->roc_barrier);
26e976a8 2578 renew_lease(server, calldata->timestamp);
412f6c4c 2579 break;
69794ad7 2580 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2581 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2582 case -NFS4ERR_OLD_STATEID:
2583 case -NFS4ERR_BAD_STATEID:
1da177e4 2584 case -NFS4ERR_EXPIRED:
dc0b027d 2585 if (calldata->arg.fmode == 0)
9e33bed5 2586 break;
1da177e4 2587 default:
8478eaa1 2588 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2589 rpc_restart_call_prepare(task);
69794ad7
TM		 2590 goto out_release;
2591 }
1da177e4 2592 }
412f6c4c 2593 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
69794ad7 2594out_release:
72211dbe 2595 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2596 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2597 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2598}
2599
4ce70ada 2600static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2601{
4ce70ada 2602 struct nfs4_closedata *calldata = data;
9512135d 2603 struct nfs4_state *state = calldata->state;
7fdab069 2604 struct inode *inode = calldata->inode;
aee7af35 2605 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2606 int call_close = 0;
9512135d 2607
a3ca5651 2608 dprintk("%s: begin!\n", __func__);
963d8fe5 2609 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2610 goto out_wait;
003707c7 2611
88069f77 2612 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2613 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2614 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2615 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2616 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
003707c7 2617 /* Calculate the change in open mode */
cd9288ff 2618 calldata->arg.fmode = 0;
e7616923 2619 if (state->n_rdwr == 0) {
cd9288ff
TM		 2620 if (state->n_rdonly == 0)
2621 call_close |= is_rdonly;
2622 else if (is_rdonly)
2623 calldata->arg.fmode |= FMODE_READ;
2624 if (state->n_wronly == 0)
2625 call_close |= is_wronly;
2626 else if (is_wronly)
2627 calldata->arg.fmode |= FMODE_WRITE;
2628 } else if (is_rdwr)
2629 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2630
2631 if (calldata->arg.fmode == 0)
2632 call_close |= is_rdwr;
2633
5d422301
TM		 2634 if (!nfs4_valid_open_stateid(state))
2635 call_close = 0;
4cecb76f 2636 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2637
2638 if (!call_close) {
963d8fe5 2639 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2640 goto out_no_action;
9512135d 2641 }
88069f77 2642
f7e8917a 2643 if (calldata->arg.fmode == 0) {
88069f77 2644 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2645 if (calldata->roc &&
b9536ad5
AA		 2646 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2647 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2648 goto out_wait;
b9536ad5 2649 }
f7e8917a 2650 }
88069f77 2651
516a6af6 2652 nfs_fattr_init(calldata->res.fattr);
26e976a8 2653 calldata->timestamp = jiffies;
7fdab069 2654 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2655 &calldata->arg.seq_args,
2656 &calldata->res.seq_res,
2240a9e2
TM		 2657 task) != 0)
2658 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2659 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2660 return;
2661out_no_action:
2662 task->tk_action = NULL;
2663out_wait:
2664 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2665}
2666
963d8fe5 2667static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2668 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2669 .rpc_call_done = nfs4_close_done,
2670 .rpc_release = nfs4_free_closedata,
2671};
2672
fe08c546
PT		 2673static bool nfs4_state_has_opener(struct nfs4_state *state)
2674{
2675 /* first check existing openers */
2676 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 &&
2677 state->n_rdonly != 0)
2678 return true;
2679
2680 if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 &&
2681 state->n_wronly != 0)
2682 return true;
2683
2684 if (test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 &&
2685 state->n_rdwr != 0)
2686 return true;
2687
2688 return false;
2689}
2690
2691static bool nfs4_roc(struct inode *inode)
2692{
2693 struct nfs_inode *nfsi = NFS_I(inode);
2694 struct nfs_open_context *ctx;
2695 struct nfs4_state *state;
2696
2697 spin_lock(&inode->i_lock);
2698 list_for_each_entry(ctx, &nfsi->open_files, list) {
2699 state = ctx->state;
2700 if (state == NULL)
2701 continue;
2702 if (nfs4_state_has_opener(state)) {
2703 spin_unlock(&inode->i_lock);
2704 return false;
2705 }
2706 }
2707 spin_unlock(&inode->i_lock);
2708
2709 if (nfs4_check_delegation(inode, FMODE_READ))
2710 return false;
2711
2712 return pnfs_roc(inode);
2713}
2714
1da177e4
LT		 2715/*
2716 * It is possible for data to be read/written from a mem-mapped file
2717 * after the sys_close call (which hits the vfs layer as a flush).
2718 * This means that we can't safely call nfsv4 close on a file until
2719 * the inode is cleared. This in turn means that we are not good
2720 * NFSv4 citizens - we do not indicate to the server to update the file's
2721 * share state even when we are done with one of the three share
2722 * stateid's in the inode.
2723 *
2724 * NOTE: Caller must be holding the sp->so_owner semaphore!
2725 */
1f7977c1 2726int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2727{
4a35bd41 2728 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2729 struct nfs4_closedata *calldata;
b39e625b
TM		 2730 struct nfs4_state_owner *sp = state->owner;
2731 struct rpc_task *task;
5138fde0
TM		 2732 struct rpc_message msg = {
2733 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2734 .rpc_cred = state->owner->so_cred,
2735 };
c970aa85
TM		 2736 struct rpc_task_setup task_setup_data = {
2737 .rpc_client = server->client,
5138fde0 2738 .rpc_message = &msg,
c970aa85 2739 .callback_ops = &nfs4_close_ops,
101070ca 2740 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2741 .flags = RPC_TASK_ASYNC,
2742 };
9512135d 2743 int status = -ENOMEM;
1da177e4 2744
fa940720
WAA		 2745 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2746 &task_setup_data.rpc_client, &msg);
2747
8535b2be 2748 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2749 if (calldata == NULL)
9512135d 2750 goto out;
a9c92d6b 2751 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2752 calldata->inode = state->inode;
1da177e4 2753 calldata->state = state;
4a35bd41 2754 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2755 calldata->arg.stateid = &state->open_stateid;
1da177e4 2756 /* Serialization for the sequence id */
8535b2be 2757 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2758 if (calldata->arg.seqid == NULL)
2759 goto out_free_calldata;
dc0b027d 2760 calldata->arg.fmode = 0;
a65318bf 2761 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2762 calldata->res.fattr = &calldata->fattr;
c1d51931 2763 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2764 calldata->res.server = server;
fe08c546 2765 calldata->roc = nfs4_roc(state->inode);
643168c2 2766 nfs_sb_active(calldata->inode->i_sb);
9512135d 2767
1174dd1f
TM		 2768 msg.rpc_argp = &calldata->arg;
2769 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2770 task_setup_data.callback_data = calldata;
2771 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2772 if (IS_ERR(task))
2773 return PTR_ERR(task);
a49c3c77
TM		 2774 status = 0;
2775 if (wait)
2776 status = rpc_wait_for_completion_task(task);
b39e625b 2777 rpc_put_task(task);
a49c3c77 2778 return status;
9512135d
TM		 2779out_free_calldata:
2780 kfree(calldata);
2781out:
b39e625b
TM		 2782 nfs4_put_open_state(state);
2783 nfs4_put_state_owner(sp);
9512135d 2784 return status;
1da177e4
LT		 2785}
2786
2b484297 2787static struct inode *
5bc2afc2
TM		 2788nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2789 int open_flags, struct iattr *attr, int *opened)
1da177e4 2790{
1da177e4 2791 struct nfs4_state *state;
aa9c2669
DQ		 2792 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2793
2794 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2795
565277f6 2796 /* Protect against concurrent sillydeletes */
5bc2afc2 2797 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2798
2799 nfs4_label_release_security(label);
2800
f46e0bd3
TM		 2801 if (IS_ERR(state))
2802 return ERR_CAST(state);
275bb307 2803 return state->inode;
1da177e4
LT		 2804}
2805
1185a552 2806static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2807{
2808 if (ctx->state == NULL)
2809 return;
2810 if (is_sync)
643168c2 2811 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2812 else
643168c2 2813 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2814}
1da177e4 2815
b944dba3
TM		 2816#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2817#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2818#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2819
1da177e4
LT		 2820static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2821{
43652ad5
BH		 2822 struct nfs4_server_caps_arg args = {
2823 .fhandle = fhandle,
2824 };
1da177e4
LT		 2825 struct nfs4_server_caps_res res = {};
2826 struct rpc_message msg = {
2827 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2828 .rpc_argp = &args,
1da177e4
LT		 2829 .rpc_resp = &res,
2830 };
2831 int status;
2832
7c513058 2833 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2834 if (status == 0) {
b944dba3
TM		 2835 /* Sanity check the server answers */
2836 switch (server->nfs_client->cl_minorversion) {
2837 case 0:
2838 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2839 res.attr_bitmask[2] = 0;
2840 break;
2841 case 1:
2842 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2843 break;
2844 case 2:
2845 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2846 }
1da177e4 2847 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2848 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2849 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2850 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2851 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2852 NFS_CAP_CTIME|NFS_CAP_MTIME|
2853 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2854 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2855 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2856 server->caps |= NFS_CAP_ACLS;
2857 if (res.has_links != 0)
2858 server->caps |= NFS_CAP_HARDLINKS;
2859 if (res.has_symlinks != 0)
2860 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2861 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2862 server->caps |= NFS_CAP_FILEID;
2863 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2864 server->caps |= NFS_CAP_MODE;
2865 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2866 server->caps |= NFS_CAP_NLINK;
2867 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2868 server->caps |= NFS_CAP_OWNER;
2869 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2870 server->caps |= NFS_CAP_OWNER_GROUP;
2871 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2872 server->caps |= NFS_CAP_ATIME;
2873 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2874 server->caps |= NFS_CAP_CTIME;
2875 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2876 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2877#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2878 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2879 server->caps |= NFS_CAP_SECURITY_LABEL;
2880#endif
2881 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2882 sizeof(server->attr_bitmask));
b944dba3 2883 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2884
a65318bf
TM		 2885 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2886 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2887 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2888 server->cache_consistency_bitmask[2] = 0;
1da177e4 2889 server->acl_bitmask = res.acl_bitmask;
264e6351 2890 server->fh_expire_type = res.fh_expire_type;
1da177e4 2891 }
cccef3b9 2892
1da177e4
LT		 2893 return status;
2894}
2895
55a97593 2896int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2897{
2898 struct nfs4_exception exception = { };
2899 int err;
2900 do {
2901 err = nfs4_handle_exception(server,
2902 _nfs4_server_capabilities(server, fhandle),
2903 &exception);
2904 } while (exception.retry);
2905 return err;
2906}
2907
2908static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2909 struct nfs_fsinfo *info)
2910{
aa9c2669 2911 u32 bitmask[3];
1da177e4 2912 struct nfs4_lookup_root_arg args = {
aa9c2669 2913 .bitmask = bitmask,
1da177e4
LT		 2914 };
2915 struct nfs4_lookup_res res = {
2916 .server = server,
0e574af1 2917 .fattr = info->fattr,
1da177e4
LT		 2918 .fh = fhandle,
2919 };
2920 struct rpc_message msg = {
2921 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2922 .rpc_argp = &args,
2923 .rpc_resp = &res,
2924 };
008f55d0 2925
aa9c2669
DQ		 2926 bitmask[0] = nfs4_fattr_bitmap[0];
2927 bitmask[1] = nfs4_fattr_bitmap[1];
2928 /*
2929 * Process the label in the upcoming getfattr
2930 */
2931 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2932
0e574af1 2933 nfs_fattr_init(info->fattr);
7c513058 2934 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2935}
2936
2937static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2938 struct nfs_fsinfo *info)
2939{
2940 struct nfs4_exception exception = { };
2941 int err;
2942 do {
fb8a5ba8 2943 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2944 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2945 switch (err) {
2946 case 0:
2947 case -NFS4ERR_WRONGSEC:
05e9cfb4 2948 goto out;
fb8a5ba8
BS		 2949 default:
2950 err = nfs4_handle_exception(server, err, &exception);
2951 }
1da177e4 2952 } while (exception.retry);
05e9cfb4 2953out:
1da177e4
LT		 2954 return err;
2955}
2956
8f70e95f
BS		 2957static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2958 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2959{
c2190661
TM		 2960 struct rpc_auth_create_args auth_args = {
2961 .pseudoflavor = flavor,
2962 };
8f70e95f
BS		 2963 struct rpc_auth *auth;
2964 int ret;
2965
c2190661 2966 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 2967 if (IS_ERR(auth)) {
75bc8821 2968 ret = -EACCES;
8f70e95f
BS		 2969 goto out;
2970 }
2971 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2972out:
2973 return ret;
2974}
2975
9a744ba3
CL		 2976/*
2977 * Retry pseudoroot lookup with various security flavors. We do this when:
2978 *
2979 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2980 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2981 *
2982 * Returns zero on success, or a negative NFS4ERR value, or a
2983 * negative errno value.
2984 */
801a16dc 2985static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2986 struct nfs_fsinfo *info)
1da177e4 2987{
9a744ba3
CL		 2988 /* Per 3530bis 15.33.5 */
2989 static const rpc_authflavor_t flav_array[] = {
2990 RPC_AUTH_GSS_KRB5P,
2991 RPC_AUTH_GSS_KRB5I,
2992 RPC_AUTH_GSS_KRB5,
c4eafe11 2993 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2994 RPC_AUTH_NULL,
2995 };
2996 int status = -EPERM;
2997 size_t i;
6a1a1e34 2998
4d4b69dd
WAA		 2999 if (server->auth_info.flavor_len > 0) {
3000 /* try each flavor specified by user */
3001 for (i = 0; i < server->auth_info.flavor_len; i++) {
3002 status = nfs4_lookup_root_sec(server, fhandle, info,
3003 server->auth_info.flavors[i]);
3004 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3005 continue;
3006 break;
3007 }
3008 } else {
3009 /* no flavors specified by user, try default list */
3010 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3011 status = nfs4_lookup_root_sec(server, fhandle, info,
3012 flav_array[i]);
3013 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3014 continue;
3015 break;
3016 }
8f70e95f 3017 }
9a744ba3 3018
fb8a5ba8
BS		 3019 /*
3020 * -EACCESS could mean that the user doesn't have correct permissions
3021 * to access the mount. It could also mean that we tried to mount
3022 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3023 * existing mount programs don't handle -EACCES very well so it should
3024 * be mapped to -EPERM instead.
3025 */
3026 if (status == -EACCES)
3027 status = -EPERM;
801a16dc
BS		 3028 return status;
3029}
3030
2ed4b95b
CL		 3031static int nfs4_do_find_root_sec(struct nfs_server *server,
3032 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3033{
3034 int mv = server->nfs_client->cl_minorversion;
3035 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3036}
3037
3038/**
3039 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3040 * @server: initialized nfs_server handle
3041 * @fhandle: we fill in the pseudo-fs root file handle
3042 * @info: we fill in an FSINFO struct
5e6b1990 3043 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3044 *
3045 * Returns zero on success, or a negative errno.
801a16dc 3046 */
3028eb2b 3047int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3048 struct nfs_fsinfo *info,
3049 bool auth_probe)
801a16dc 3050{
2ed4b95b
CL		 3051 int status;
3052
5e6b1990
TM		 3053 switch (auth_probe) {
3054 case false:
3055 status = nfs4_lookup_root(server, fhandle, info);
3056 if (status != -NFS4ERR_WRONGSEC)
3057 break;
5e6b1990 3058 default:
2ed4b95b 3059 status = nfs4_do_find_root_sec(server, fhandle, info);
5e6b1990 3060 }
2ed4b95b 3061
1da177e4
LT		 3062 if (status == 0)
3063 status = nfs4_server_capabilities(server, fhandle);
3064 if (status == 0)
3065 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3066
c12e87f4 3067 return nfs4_map_errors(status);
1da177e4
LT		 3068}
3069
bae36241
BS		 3070static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3071 struct nfs_fsinfo *info)
3072{
3073 int error;
3074 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3075 struct nfs4_label *label = NULL;
bae36241
BS		 3076
3077 error = nfs4_server_capabilities(server, mntfh);
3078 if (error < 0) {
3079 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3080 return error;
3081 }
3082
14c43f76
DQ		 3083 label = nfs4_label_alloc(server, GFP_KERNEL);
3084 if (IS_ERR(label))
3085 return PTR_ERR(label);
3086
1775fd3e 3087 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3088 if (error < 0) {
3089 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3090 goto err_free_label;
bae36241
BS		 3091 }
3092
3093 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3094 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3095 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3096
14c43f76
DQ		 3097err_free_label:
3098 nfs4_label_free(label);
3099
bae36241
BS		 3100 return error;
3101}
3102
6b97fd3d
MN		 3103/*
3104 * Get locations and (maybe) other attributes of a referral.
3105 * Note that we'll actually follow the referral later when
3106 * we detect fsid mismatch in inode revalidation
3107 */
f05d147f
BS		 3108static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3109 const struct qstr *name, struct nfs_fattr *fattr,
3110 struct nfs_fh *fhandle)
6b97fd3d
MN		 3111{
3112 int status = -ENOMEM;
3113 struct page *page = NULL;
3114 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3115
3116 page = alloc_page(GFP_KERNEL);
3117 if (page == NULL)
3118 goto out;
3119 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3120 if (locations == NULL)
3121 goto out;
3122
f05d147f 3123 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3124 if (status != 0)
3125 goto out;
519ae255
CL		 3126
3127 /*
3128 * If the fsid didn't change, this is a migration event, not a
3129 * referral. Cause us to drop into the exception handler, which
3130 * will kick off migration recovery.
3131 */
6b97fd3d 3132 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3133 dprintk("%s: server did not return a different fsid for"
3134 " a referral at %s\n", __func__, name->name);
519ae255 3135 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3136 goto out;
3137 }
533eb461
AA		 3138 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3139 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3140
533eb461 3141 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3142 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3143 memset(fhandle, 0, sizeof(struct nfs_fh));
3144out:
3145 if (page)
3146 __free_page(page);
5d7ca35a 3147 kfree(locations);
6b97fd3d
MN		 3148 return status;
3149}
3150
1775fd3e
DQ		 3151static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3152 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3153{
3154 struct nfs4_getattr_arg args = {
3155 .fh = fhandle,
3156 .bitmask = server->attr_bitmask,
3157 };
3158 struct nfs4_getattr_res res = {
3159 .fattr = fattr,
1775fd3e 3160 .label = label,
1da177e4
LT		 3161 .server = server,
3162 };
3163 struct rpc_message msg = {
3164 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3165 .rpc_argp = &args,
3166 .rpc_resp = &res,
3167 };
aa9c2669
DQ		 3168
3169 args.bitmask = nfs4_bitmask(server, label);
3170
0e574af1 3171 nfs_fattr_init(fattr);
7c513058 3172 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3173}
3174
1775fd3e
DQ		 3175static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3176 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3177{
3178 struct nfs4_exception exception = { };
3179 int err;
3180 do {
b5f875a9
TM		 3181 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3182 trace_nfs4_getattr(server, fhandle, fattr, err);
3183 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3184 &exception);
3185 } while (exception.retry);
3186 return err;
3187}
3188
3189/*
3190 * The file is not closed if it is opened due to the a request to change
3191 * the size of the file. The open call will not be needed once the
3192 * VFS layer lookup-intents are implemented.
3193 *
3194 * Close is called when the inode is destroyed.
3195 * If we haven't opened the file for O_WRONLY, we
3196 * need to in the size_change case to obtain a stateid.
3197 *
3198 * Got race?
3199 * Because OPEN is always done by name in nfsv4, it is
3200 * possible that we opened a different file by the same
3201 * name. We can recognize this race condition, but we
3202 * can't do anything about it besides returning an error.
3203 *
3204 * This will be fixed with VFS changes (lookup-intent).
3205 */
3206static int
3207nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3208 struct iattr *sattr)
3209{
08e9eac4 3210 struct inode *inode = dentry->d_inode;
659bfcd6 3211 struct rpc_cred *cred = NULL;
d530838b 3212 struct nfs4_state *state = NULL;
14c43f76 3213 struct nfs4_label *label = NULL;
1da177e4
LT		 3214 int status;
3215
88ac815c
PT		 3216 if (pnfs_ld_layoutret_on_setattr(inode) &&
3217 sattr->ia_valid & ATTR_SIZE &&
3218 sattr->ia_size < i_size_read(inode))
24028672 3219 pnfs_commit_and_return_layout(inode);
8a1636c4 3220
0e574af1 3221 nfs_fattr_init(fattr);
1da177e4 3222
2669940d
AA		 3223 /* Deal with open(O_TRUNC) */
3224 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3225 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3226
3227 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3228 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3229 return 0;
3230
d530838b 3231 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3232 if (sattr->ia_valid & ATTR_FILE) {
3233 struct nfs_open_context *ctx;
3234
3235 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3236 if (ctx) {
3237 cred = ctx->cred;
3238 state = ctx->state;
3239 }
659bfcd6 3240 }
08e9eac4 3241
14c43f76
DQ		 3242 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3243 if (IS_ERR(label))
3244 return PTR_ERR(label);
3245
3246 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3247 if (status == 0) {
65e4308d 3248 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 3249 nfs_setsecurity(inode, fattr, label);
3250 }
14c43f76 3251 nfs4_label_free(label);
1da177e4
LT		 3252 return status;
3253}
3254
0c2e53f1
TM		 3255static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3256 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3257 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3258{
0c2e53f1 3259 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3260 int status;
3261 struct nfs4_lookup_arg args = {
3262 .bitmask = server->attr_bitmask,
0c2e53f1 3263 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3264 .name = name,
3265 };
3266 struct nfs4_lookup_res res = {
3267 .server = server,
3268 .fattr = fattr,
aa9c2669 3269 .label = label,
2b3de441
DH		 3270 .fh = fhandle,
3271 };
3272 struct rpc_message msg = {
3273 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3274 .rpc_argp = &args,
3275 .rpc_resp = &res,
3276 };
3277
aa9c2669
DQ		 3278 args.bitmask = nfs4_bitmask(server, label);
3279
2b3de441
DH		 3280 nfs_fattr_init(fattr);
3281
1da177e4 3282 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3283 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3284 dprintk("NFS reply lookup: %d\n", status);
3285 return status;
3286}
3287
72de53ec 3288static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3289{
7ebb9315 3290 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3291 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3292 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3293 fattr->nlink = 2;
3294}
3295
72de53ec
BS		 3296static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3297 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3298 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3299{
3300 struct nfs4_exception exception = { };
72de53ec 3301 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3302 int err;
3303 do {
1775fd3e 3304 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3305 trace_nfs4_lookup(dir, name, err);
72de53ec 3306 switch (err) {
08ef7bd3 3307 case -NFS4ERR_BADNAME:
72de53ec
BS		 3308 err = -ENOENT;
3309 goto out;
0c2e53f1 3310 case -NFS4ERR_MOVED:
f05d147f 3311 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3312 goto out;
0c2e53f1 3313 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3314 err = -EPERM;
3315 if (client != *clnt)
3316 goto out;
66b06860 3317 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3318 if (IS_ERR(client))
3319 return PTR_ERR(client);
3320
3321 exception.retry = 1;
3322 break;
3323 default:
3324 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3325 }
1da177e4 3326 } while (exception.retry);
72de53ec
BS		 3327
3328out:
3329 if (err == 0)
3330 *clnt = client;
3331 else if (client != *clnt)
3332 rpc_shutdown_client(client);
3333
1da177e4
LT		 3334 return err;
3335}
3336
80a16b21 3337static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3338 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3339 struct nfs4_label *label)
72de53ec
BS		 3340{
3341 int status;
3342 struct rpc_clnt *client = NFS_CLIENT(dir);
3343
1775fd3e 3344 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3345 if (client != NFS_CLIENT(dir)) {
3346 rpc_shutdown_client(client);
3347 nfs_fixup_secinfo_attributes(fattr);
3348 }
3349 return status;
3350}
3351
f05d147f
BS		 3352struct rpc_clnt *
3353nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3354 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3355{
b72888cb 3356 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3357 int status;
f05d147f 3358
1775fd3e 3359 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3360 if (status < 0)
f05d147f 3361 return ERR_PTR(status);
b72888cb 3362 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3363}
3364
1da177e4
LT		 3365static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3366{
76b32999 3367 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3368 struct nfs4_accessargs args = {
3369 .fh = NFS_FH(inode),
a4980e78 3370 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3371 };
3372 struct nfs4_accessres res = {
3373 .server = server,
1da177e4 3374 };
1da177e4
LT		 3375 struct rpc_message msg = {
3376 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3377 .rpc_argp = &args,
3378 .rpc_resp = &res,
3379 .rpc_cred = entry->cred,
3380 };
3381 int mode = entry->mask;
aa9c2669 3382 int status = 0;
1da177e4
LT		 3383
3384 /*
3385 * Determine which access bits we want to ask for...
3386 */
3387 if (mode & MAY_READ)
3388 args.access |= NFS4_ACCESS_READ;
3389 if (S_ISDIR(inode->i_mode)) {
3390 if (mode & MAY_WRITE)
3391 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3392 if (mode & MAY_EXEC)
3393 args.access |= NFS4_ACCESS_LOOKUP;
3394 } else {
3395 if (mode & MAY_WRITE)
3396 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3397 if (mode & MAY_EXEC)
3398 args.access |= NFS4_ACCESS_EXECUTE;
3399 }
c407d41a
TM		 3400
3401 res.fattr = nfs_alloc_fattr();
3402 if (res.fattr == NULL)
3403 return -ENOMEM;
3404
7c513058 3405 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3406 if (!status) {
6168f62c 3407 nfs_access_set_mask(entry, res.access);
c407d41a 3408 nfs_refresh_inode(inode, res.fattr);
1da177e4 3409 }
c407d41a 3410 nfs_free_fattr(res.fattr);
1da177e4
LT		 3411 return status;
3412}
3413
3414static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3415{
3416 struct nfs4_exception exception = { };
3417 int err;
3418 do {
c1578b76
TM		 3419 err = _nfs4_proc_access(inode, entry);
3420 trace_nfs4_access(inode, err);
3421 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3422 &exception);
3423 } while (exception.retry);
3424 return err;
3425}
3426
3427/*
3428 * TODO: For the time being, we don't try to get any attributes
3429 * along with any of the zero-copy operations READ, READDIR,
3430 * READLINK, WRITE.
3431 *
3432 * In the case of the first three, we want to put the GETATTR
3433 * after the read-type operation -- this is because it is hard
3434 * to predict the length of a GETATTR response in v4, and thus
3435 * align the READ data correctly. This means that the GETATTR
3436 * may end up partially falling into the page cache, and we should
3437 * shift it into the 'tail' of the xdr_buf before processing.
3438 * To do this efficiently, we need to know the total length
3439 * of data received, which doesn't seem to be available outside
3440 * of the RPC layer.
3441 *
3442 * In the case of WRITE, we also want to put the GETATTR after
3443 * the operation -- in this case because we want to make sure
140150db 3444 * we get the post-operation mtime and size.
1da177e4
LT		 3445 *
3446 * Both of these changes to the XDR layer would in fact be quite
3447 * minor, but I decided to leave them for a subsequent patch.
3448 */
3449static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3450 unsigned int pgbase, unsigned int pglen)
3451{
3452 struct nfs4_readlink args = {
3453 .fh = NFS_FH(inode),
3454 .pgbase = pgbase,
3455 .pglen = pglen,
3456 .pages = &page,
3457 };
f50c7000 3458 struct nfs4_readlink_res res;
1da177e4
LT		 3459 struct rpc_message msg = {
3460 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3461 .rpc_argp = &args,
f50c7000 3462 .rpc_resp = &res,
1da177e4
LT		 3463 };
3464
7c513058 3465 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3466}
3467
3468static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3469 unsigned int pgbase, unsigned int pglen)
3470{
3471 struct nfs4_exception exception = { };
3472 int err;
3473 do {
c1578b76
TM		 3474 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3475 trace_nfs4_readlink(inode, err);
3476 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3477 &exception);
3478 } while (exception.retry);
3479 return err;
3480}
3481
1da177e4 3482/*
8867fe58 3483 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3484 */
1da177e4
LT		 3485static int
3486nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3487 int flags)
1da177e4 3488{
aa9c2669 3489 struct nfs4_label l, *ilabel = NULL;
8867fe58 3490 struct nfs_open_context *ctx;
1da177e4 3491 struct nfs4_state *state;
5bc2afc2 3492 int opened = 0;
1da177e4
LT		 3493 int status = 0;
3494
8867fe58
MS		 3495 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3496 if (IS_ERR(ctx))
3497 return PTR_ERR(ctx);
3498
aa9c2669
DQ		 3499 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3500
a8a5da99 3501 sattr->ia_mode &= ~current_umask();
5bc2afc2 3502 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3503 if (IS_ERR(state)) {
3504 status = PTR_ERR(state);
c0204fd2 3505 goto out;
1da177e4 3506 }
1da177e4 3507out:
aa9c2669 3508 nfs4_label_release_security(ilabel);
8867fe58 3509 put_nfs_open_context(ctx);
1da177e4
LT		 3510 return status;
3511}
3512
3513static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3514{
16e42959 3515 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3516 struct nfs_removeargs args = {
1da177e4 3517 .fh = NFS_FH(dir),
26fe5750 3518 .name = *name,
16e42959 3519 };
4fdc17b2 3520 struct nfs_removeres res = {
16e42959 3521 .server = server,
1da177e4 3522 };
1da177e4 3523 struct rpc_message msg = {
4fdc17b2
TM		 3524 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3525 .rpc_argp = &args,
3526 .rpc_resp = &res,
1da177e4 3527 };
778d2817 3528 int status;
1da177e4 3529
7c513058 3530 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3531 if (status == 0)
16e42959 3532 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3533 return status;
3534}
3535
3536static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3537{
3538 struct nfs4_exception exception = { };
3539 int err;
3540 do {
078ea3df
TM		 3541 err = _nfs4_proc_remove(dir, name);
3542 trace_nfs4_remove(dir, name, err);
3543 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3544 &exception);
3545 } while (exception.retry);
3546 return err;
3547}
3548
e4eff1a6 3549static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3550{
e4eff1a6
TM		 3551 struct nfs_server *server = NFS_SERVER(dir);
3552 struct nfs_removeargs *args = msg->rpc_argp;
3553 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3554
e4eff1a6 3555 res->server = server;
1da177e4 3556 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3557 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3558
3559 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3560}
3561
34e137cc
BS		 3562static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3563{
d9afbd1b
TM		 3564 nfs4_setup_sequence(NFS_SERVER(data->dir),
3565 &data->args.seq_args,
3566 &data->res.seq_res,
3567 task);
1da177e4
LT		 3568}
3569
e4eff1a6 3570static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3571{
078ea3df
TM		 3572 struct nfs_unlinkdata *data = task->tk_calldata;
3573 struct nfs_removeres *res = &data->res;
e4eff1a6 3574
14516c3a
TM		 3575 if (!nfs4_sequence_done(task, &res->seq_res))
3576 return 0;
8478eaa1
N		 3577 if (nfs4_async_handle_error(task, res->server, NULL,
3578 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3579 return 0;
3580 update_changeattr(dir, &res->cinfo);
e4eff1a6 3581 return 1;
1da177e4
LT		 3582}
3583
d3d4152a
JL		 3584static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3585{
3586 struct nfs_server *server = NFS_SERVER(dir);
3587 struct nfs_renameargs *arg = msg->rpc_argp;
3588 struct nfs_renameres *res = msg->rpc_resp;
3589
3590 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3591 res->server = server;
a9c92d6b 3592 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3593}
3594
c6bfa1a1
BS		 3595static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3596{
d9afbd1b
TM		 3597 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3598 &data->args.seq_args,
3599 &data->res.seq_res,
3600 task);
d3d4152a
JL		 3601}
3602
3603static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3604 struct inode *new_dir)
3605{
fbc6f7c2
TM		 3606 struct nfs_renamedata *data = task->tk_calldata;
3607 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3608
3609 if (!nfs4_sequence_done(task, &res->seq_res))
3610 return 0;
8478eaa1 3611 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3612 return 0;
3613
3614 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3615 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3616 return 1;
3617}
3618
1da177e4
LT		 3619static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3620{
91ba2eee 3621 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3622 struct nfs4_link_arg arg = {
3623 .fh = NFS_FH(inode),
3624 .dir_fh = NFS_FH(dir),
3625 .name = name,
91ba2eee
TM		 3626 .bitmask = server->attr_bitmask,
3627 };
91ba2eee
TM		 3628 struct nfs4_link_res res = {
3629 .server = server,
1775fd3e 3630 .label = NULL,
1da177e4 3631 };
1da177e4
LT		 3632 struct rpc_message msg = {
3633 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3634 .rpc_argp = &arg,
91ba2eee 3635 .rpc_resp = &res,
1da177e4 3636 };
136f2627
TM		 3637 int status = -ENOMEM;
3638
3639 res.fattr = nfs_alloc_fattr();
778d2817 3640 if (res.fattr == NULL)
136f2627 3641 goto out;
1da177e4 3642
14c43f76
DQ		 3643 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3644 if (IS_ERR(res.label)) {
3645 status = PTR_ERR(res.label);
3646 goto out;
3647 }
aa9c2669 3648 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3649
7c513058 3650 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3651 if (!status) {
3652 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3653 status = nfs_post_op_update_inode(inode, res.fattr);
3654 if (!status)
3655 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3656 }
14c43f76
DQ		 3657
3658
3659 nfs4_label_free(res.label);
3660
136f2627 3661out:
136f2627 3662 nfs_free_fattr(res.fattr);
1da177e4
LT		 3663 return status;
3664}
3665
3666static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3667{
3668 struct nfs4_exception exception = { };
3669 int err;
3670 do {
3671 err = nfs4_handle_exception(NFS_SERVER(inode),
3672 _nfs4_proc_link(inode, dir, name),
3673 &exception);
3674 } while (exception.retry);
3675 return err;
3676}
3677
57dc9a57
TM		 3678struct nfs4_createdata {
3679 struct rpc_message msg;
3680 struct nfs4_create_arg arg;
3681 struct nfs4_create_res res;
3682 struct nfs_fh fh;
3683 struct nfs_fattr fattr;
1775fd3e 3684 struct nfs4_label *label;
57dc9a57
TM		 3685};
3686
3687static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3688 struct qstr *name, struct iattr *sattr, u32 ftype)
3689{
3690 struct nfs4_createdata *data;
3691
3692 data = kzalloc(sizeof(*data), GFP_KERNEL);
3693 if (data != NULL) {
3694 struct nfs_server *server = NFS_SERVER(dir);
3695
14c43f76
DQ		 3696 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3697 if (IS_ERR(data->label))
3698 goto out_free;
3699
57dc9a57
TM		 3700 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3701 data->msg.rpc_argp = &data->arg;
3702 data->msg.rpc_resp = &data->res;
3703 data->arg.dir_fh = NFS_FH(dir);
3704 data->arg.server = server;
3705 data->arg.name = name;
3706 data->arg.attrs = sattr;
3707 data->arg.ftype = ftype;
aa9c2669 3708 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3709 data->res.server = server;
3710 data->res.fh = &data->fh;
3711 data->res.fattr = &data->fattr;
1775fd3e 3712 data->res.label = data->label;
57dc9a57 3713 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3714 }
3715 return data;
14c43f76
DQ		 3716out_free:
3717 kfree(data);
3718 return NULL;
57dc9a57
TM		 3719}
3720
3721static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3722{
7c513058 3723 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3724 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3725 if (status == 0) {
3726 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3727 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3728 }
3729 return status;
3730}
3731
3732static void nfs4_free_createdata(struct nfs4_createdata *data)
3733{
14c43f76 3734 nfs4_label_free(data->label);
57dc9a57
TM		 3735 kfree(data);
3736}
3737
4f390c15 3738static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3739 struct page *page, unsigned int len, struct iattr *sattr,
3740 struct nfs4_label *label)
1da177e4 3741{
57dc9a57
TM		 3742 struct nfs4_createdata *data;
3743 int status = -ENAMETOOLONG;
1da177e4 3744
94a6d753 3745 if (len > NFS4_MAXPATHLEN)
57dc9a57 3746 goto out;
4f390c15 3747
57dc9a57
TM		 3748 status = -ENOMEM;
3749 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3750 if (data == NULL)
3751 goto out;
3752
3753 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3754 data->arg.u.symlink.pages = &page;
3755 data->arg.u.symlink.len = len;
1775fd3e 3756 data->arg.label = label;
1da177e4 3757
57dc9a57
TM		 3758 status = nfs4_do_create(dir, dentry, data);
3759
3760 nfs4_free_createdata(data);
3761out:
1da177e4
LT		 3762 return status;
3763}
3764
4f390c15 3765static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3766 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3767{
3768 struct nfs4_exception exception = { };
aa9c2669 3769 struct nfs4_label l, *label = NULL;
1da177e4 3770 int err;
aa9c2669
DQ		 3771
3772 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3773
1da177e4 3774 do {
078ea3df
TM		 3775 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3776 trace_nfs4_symlink(dir, &dentry->d_name, err);
3777 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3778 &exception);
3779 } while (exception.retry);
aa9c2669
DQ		 3780
3781 nfs4_label_release_security(label);
1da177e4
LT		 3782 return err;
3783}
3784
3785static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3786 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3787{
57dc9a57
TM		 3788 struct nfs4_createdata *data;
3789 int status = -ENOMEM;
1da177e4 3790
57dc9a57
TM		 3791 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3792 if (data == NULL)
3793 goto out;
3794
1775fd3e 3795 data->arg.label = label;
57dc9a57
TM		 3796 status = nfs4_do_create(dir, dentry, data);
3797
3798 nfs4_free_createdata(data);
3799out:
1da177e4
LT		 3800 return status;
3801}
3802
3803static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3804 struct iattr *sattr)
3805{
3806 struct nfs4_exception exception = { };
aa9c2669 3807 struct nfs4_label l, *label = NULL;
1da177e4 3808 int err;
a8a5da99 3809
aa9c2669
DQ		 3810 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3811
a8a5da99 3812 sattr->ia_mode &= ~current_umask();
1da177e4 3813 do {
078ea3df
TM		 3814 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3815 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3816 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3817 &exception);
3818 } while (exception.retry);
aa9c2669
DQ		 3819 nfs4_label_release_security(label);
3820
1da177e4
LT		 3821 return err;
3822}
3823
3824static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3825 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3826{
3827 struct inode *dir = dentry->d_inode;
3828 struct nfs4_readdir_arg args = {
3829 .fh = NFS_FH(dir),
56e4ebf8 3830 .pages = pages,
1da177e4
LT		 3831 .pgbase = 0,
3832 .count = count,
96d25e53 3833 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3834 .plus = plus,
1da177e4
LT		 3835 };
3836 struct nfs4_readdir_res res;
3837 struct rpc_message msg = {
3838 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3839 .rpc_argp = &args,
3840 .rpc_resp = &res,
3841 .rpc_cred = cred,
3842 };
3843 int status;
3844
6de1472f
AV		 3845 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3846 dentry,
eadf4598 3847 (unsigned long long)cookie);
c3f52af3 3848 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3849 res.pgbase = args.pgbase;
7c513058 3850 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3851 if (status >= 0) {
c3f52af3 3852 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3853 status += args.pgbase;
3854 }
c4812998
TM		 3855
3856 nfs_invalidate_atime(dir);
3857
3110ff80 3858 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3859 return status;
3860}
3861
3862static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3863 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3864{
3865 struct nfs4_exception exception = { };
3866 int err;
3867 do {
c1578b76
TM		 3868 err = _nfs4_proc_readdir(dentry, cred, cookie,
3869 pages, count, plus);
3870 trace_nfs4_readdir(dentry->d_inode, err);
3871 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3872 &exception);
3873 } while (exception.retry);
3874 return err;
3875}
3876
3877static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3878 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3879{
57dc9a57
TM		 3880 struct nfs4_createdata *data;
3881 int mode = sattr->ia_mode;
3882 int status = -ENOMEM;
1da177e4 3883
57dc9a57
TM		 3884 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3885 if (data == NULL)
3886 goto out;
3887
1da177e4 3888 if (S_ISFIFO(mode))
57dc9a57 3889 data->arg.ftype = NF4FIFO;
1da177e4 3890 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3891 data->arg.ftype = NF4BLK;
3892 data->arg.u.device.specdata1 = MAJOR(rdev);
3893 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3894 }
3895 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3896 data->arg.ftype = NF4CHR;
3897 data->arg.u.device.specdata1 = MAJOR(rdev);
3898 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3899 } else if (!S_ISSOCK(mode)) {
3900 status = -EINVAL;
3901 goto out_free;
1da177e4 3902 }
1775fd3e 3903
aa9c2669 3904 data->arg.label = label;
57dc9a57 3905 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3906out_free:
57dc9a57
TM		 3907 nfs4_free_createdata(data);
3908out:
1da177e4
LT		 3909 return status;
3910}
3911
3912static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3913 struct iattr *sattr, dev_t rdev)
3914{
3915 struct nfs4_exception exception = { };
aa9c2669 3916 struct nfs4_label l, *label = NULL;
1da177e4 3917 int err;
a8a5da99 3918
aa9c2669
DQ		 3919 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3920
a8a5da99 3921 sattr->ia_mode &= ~current_umask();
1da177e4 3922 do {
078ea3df
TM		 3923 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3924 trace_nfs4_mknod(dir, &dentry->d_name, err);
3925 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3926 &exception);
3927 } while (exception.retry);
aa9c2669
DQ		 3928
3929 nfs4_label_release_security(label);
3930
1da177e4
LT		 3931 return err;
3932}
3933
3934static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3935 struct nfs_fsstat *fsstat)
3936{
3937 struct nfs4_statfs_arg args = {
3938 .fh = fhandle,
3939 .bitmask = server->attr_bitmask,
3940 };
24ad148a
BH		 3941 struct nfs4_statfs_res res = {
3942 .fsstat = fsstat,
3943 };
1da177e4
LT		 3944 struct rpc_message msg = {
3945 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3946 .rpc_argp = &args,
24ad148a 3947 .rpc_resp = &res,
1da177e4
LT		 3948 };
3949
0e574af1 3950 nfs_fattr_init(fsstat->fattr);
7c513058 3951 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3952}
3953
3954static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3955{
3956 struct nfs4_exception exception = { };
3957 int err;
3958 do {
3959 err = nfs4_handle_exception(server,
3960 _nfs4_proc_statfs(server, fhandle, fsstat),
3961 &exception);
3962 } while (exception.retry);
3963 return err;
3964}
3965
3966static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3967 struct nfs_fsinfo *fsinfo)
3968{
3969 struct nfs4_fsinfo_arg args = {
3970 .fh = fhandle,
3971 .bitmask = server->attr_bitmask,
3972 };
3dda5e43
BH		 3973 struct nfs4_fsinfo_res res = {
3974 .fsinfo = fsinfo,
3975 };
1da177e4
LT		 3976 struct rpc_message msg = {
3977 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3978 .rpc_argp = &args,
3dda5e43 3979 .rpc_resp = &res,
1da177e4
LT		 3980 };
3981
7c513058 3982 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3983}
3984
3985static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3986{
3987 struct nfs4_exception exception = { };
83ca7f5a 3988 unsigned long now = jiffies;
1da177e4
LT		 3989 int err;
3990
3991 do {
83ca7f5a 3992 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 3993 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 3994 if (err == 0) {
3995 struct nfs_client *clp = server->nfs_client;
3996
3997 spin_lock(&clp->cl_lock);
3998 clp->cl_lease_time = fsinfo->lease_time * HZ;
3999 clp->cl_last_renewal = now;
4000 spin_unlock(&clp->cl_lock);
4001 break;
4002 }
4003 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4004 } while (exception.retry);
4005 return err;
4006}
4007
4008static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4009{
e38eb650
BS		 4010 int error;
4011
0e574af1 4012 nfs_fattr_init(fsinfo->fattr);
e38eb650 4013 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4014 if (error == 0) {
4015 /* block layout checks this! */
4016 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4017 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4018 }
e38eb650
BS		 4019
4020 return error;
1da177e4
LT		 4021}
4022
4023static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4024 struct nfs_pathconf *pathconf)
4025{
4026 struct nfs4_pathconf_arg args = {
4027 .fh = fhandle,
4028 .bitmask = server->attr_bitmask,
4029 };
d45b2989
BH		 4030 struct nfs4_pathconf_res res = {
4031 .pathconf = pathconf,
4032 };
1da177e4
LT		 4033 struct rpc_message msg = {
4034 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4035 .rpc_argp = &args,
d45b2989 4036 .rpc_resp = &res,
1da177e4
LT		 4037 };
4038
4039 /* None of the pathconf attributes are mandatory to implement */
4040 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4041 memset(pathconf, 0, sizeof(*pathconf));
4042 return 0;
4043 }
4044
0e574af1 4045 nfs_fattr_init(pathconf->fattr);
7c513058 4046 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4047}
4048
4049static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4050 struct nfs_pathconf *pathconf)
4051{
4052 struct nfs4_exception exception = { };
4053 int err;
4054
4055 do {
4056 err = nfs4_handle_exception(server,
4057 _nfs4_proc_pathconf(server, fhandle, pathconf),
4058 &exception);
4059 } while (exception.retry);
4060 return err;
4061}
4062
5521abfd 4063int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4064 const struct nfs_open_context *ctx,
4065 const struct nfs_lock_context *l_ctx,
4066 fmode_t fmode)
4067{
4068 const struct nfs_lockowner *lockowner = NULL;
4069
4070 if (l_ctx != NULL)
4071 lockowner = &l_ctx->lockowner;
5521abfd 4072 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4073}
4074EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4075
5521abfd
TM		 4076static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4077 const struct nfs_open_context *ctx,
4078 const struct nfs_lock_context *l_ctx,
4079 fmode_t fmode)
4080{
4081 nfs4_stateid current_stateid;
4082
e1253be0
TM		 4083 /* If the current stateid represents a lost lock, then exit */
4084 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4085 return true;
5521abfd
TM		 4086 return nfs4_stateid_match(stateid, &current_stateid);
4087}
4088
4089static bool nfs4_error_stateid_expired(int err)
4090{
4091 switch (err) {
4092 case -NFS4ERR_DELEG_REVOKED:
4093 case -NFS4ERR_ADMIN_REVOKED:
4094 case -NFS4ERR_BAD_STATEID:
4095 case -NFS4ERR_STALE_STATEID:
4096 case -NFS4ERR_OLD_STATEID:
4097 case -NFS4ERR_OPENMODE:
4098 case -NFS4ERR_EXPIRED:
4099 return true;
4100 }
4101 return false;
4102}
4103
d45f60c6 4104void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4105{
d45f60c6 4106 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4107}
4108
d45f60c6 4109static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4110{
d45f60c6 4111 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4112
d45f60c6
WAA		 4113 trace_nfs4_read(hdr, task->tk_status);
4114 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4115 hdr->args.context->state,
4116 NULL) == -EAGAIN) {
d00c5d43 4117 rpc_restart_call_prepare(task);
ec06c096 4118 return -EAGAIN;
1da177e4 4119 }
8850df99 4120
d45f60c6 4121 __nfs4_read_done_cb(hdr);
1da177e4 4122 if (task->tk_status > 0)
d45f60c6 4123 renew_lease(server, hdr->timestamp);
ec06c096 4124 return 0;
1da177e4
LT		 4125}
4126
5521abfd 4127static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4128 struct nfs_pgio_args *args)
5521abfd
TM		 4129{
4130
4131 if (!nfs4_error_stateid_expired(task->tk_status) ||
4132 nfs4_stateid_is_current(&args->stateid,
4133 args->context,
4134 args->lock_context,
4135 FMODE_READ))
4136 return false;
4137 rpc_restart_call_prepare(task);
4138 return true;
4139}
4140
d45f60c6 4141static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4142{
4143
4144 dprintk("--> %s\n", __func__);
4145
d45f60c6 4146 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4147 return -EAGAIN;
d45f60c6 4148 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4149 return -EAGAIN;
d45f60c6
WAA		 4150 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4151 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4152}
4153
d45f60c6
WAA		 4154static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4155 struct rpc_message *msg)
1da177e4 4156{
d45f60c6
WAA		 4157 hdr->timestamp = jiffies;
4158 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4159 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4160 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4161}
4162
d45f60c6
WAA		 4163static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4164 struct nfs_pgio_header *hdr)
ea7c3303 4165{
d45f60c6
WAA		 4166 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4167 &hdr->args.seq_args,
4168 &hdr->res.seq_res,
9b206149 4169 task))
ef1820f9 4170 return 0;
d45f60c6
WAA		 4171 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4172 hdr->args.lock_context,
4173 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4174 return -EIO;
d45f60c6 4175 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4176 return -EIO;
4177 return 0;
1da177e4
LT		 4178}
4179
d45f60c6
WAA		 4180static int nfs4_write_done_cb(struct rpc_task *task,
4181 struct nfs_pgio_header *hdr)
1da177e4 4182{
d45f60c6 4183 struct inode *inode = hdr->inode;
8478eaa1 4184
d45f60c6
WAA		 4185 trace_nfs4_write(hdr, task->tk_status);
4186 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4187 hdr->args.context->state,
4188 NULL) == -EAGAIN) {
d00c5d43 4189 rpc_restart_call_prepare(task);
788e7a89 4190 return -EAGAIN;
1da177e4 4191 }
4f9838c7 4192 if (task->tk_status >= 0) {
d45f60c6
WAA		 4193 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4194 nfs_post_op_update_inode_force_wcc(inode, &hdr->fattr);
4f9838c7 4195 }
788e7a89 4196 return 0;
1da177e4
LT		 4197}
4198
5521abfd 4199static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4200 struct nfs_pgio_args *args)
5521abfd
TM		 4201{
4202
4203 if (!nfs4_error_stateid_expired(task->tk_status) ||
4204 nfs4_stateid_is_current(&args->stateid,
4205 args->context,
4206 args->lock_context,
4207 FMODE_WRITE))
4208 return false;
4209 rpc_restart_call_prepare(task);
4210 return true;
4211}
4212
d45f60c6 4213static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4214{
d45f60c6 4215 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4216 return -EAGAIN;
d45f60c6 4217 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4218 return -EAGAIN;
d45f60c6
WAA		 4219 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4220 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4221}
4222
5a37f851 4223static
d45f60c6 4224bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4225{
5a37f851 4226 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4227 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4228 return false;
4229 /* Otherwise, request attributes if and only if we don't hold
4230 * a delegation
4231 */
011e2a7f 4232 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4233}
a69aef14 4234
d45f60c6
WAA		 4235static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4236 struct rpc_message *msg)
1da177e4 4237{
d45f60c6 4238 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4239
d45f60c6
WAA		 4240 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4241 hdr->args.bitmask = NULL;
4242 hdr->res.fattr = NULL;
7ffd1064 4243 } else
d45f60c6 4244 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4245
d45f60c6
WAA		 4246 if (!hdr->pgio_done_cb)
4247 hdr->pgio_done_cb = nfs4_write_done_cb;
4248 hdr->res.server = server;
4249 hdr->timestamp = jiffies;
1da177e4 4250
bdc7f021 4251 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4252 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4253}
4254
0b7c0153 4255static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4256{
d9afbd1b
TM		 4257 nfs4_setup_sequence(NFS_SERVER(data->inode),
4258 &data->args.seq_args,
4259 &data->res.seq_res,
4260 task);
1da177e4
LT		 4261}
4262
0b7c0153 4263static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4264{
1da177e4 4265 struct inode *inode = data->inode;
14516c3a 4266
cc668ab3 4267 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4268 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4269 NULL, NULL) == -EAGAIN) {
d00c5d43 4270 rpc_restart_call_prepare(task);
788e7a89 4271 return -EAGAIN;
1da177e4 4272 }
788e7a89 4273 return 0;
1da177e4
LT		 4274}
4275
0b7c0153 4276static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4277{
4278 if (!nfs4_sequence_done(task, &data->res.seq_res))
4279 return -EAGAIN;
0b7c0153 4280 return data->commit_done_cb(task, data);
5f452431
FI		 4281}
4282
0b7c0153 4283static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4284{
788e7a89 4285 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4286
0b7c0153
FI		 4287 if (data->commit_done_cb == NULL)
4288 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4289 data->res.server = server;
bdc7f021 4290 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4291 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4292}
4293
9bc4e3ca
CL		 4294struct nfs4_renewdata {
4295 struct nfs_client *client;
4296 unsigned long timestamp;
4297};
4298
1da177e4
LT		 4299/*
4300 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4301 * standalone procedure for queueing an asynchronous RENEW.
4302 */
9bc4e3ca 4303static void nfs4_renew_release(void *calldata)
dc96aef9 4304{
9bc4e3ca
CL		 4305 struct nfs4_renewdata *data = calldata;
4306 struct nfs_client *clp = data->client;
dc96aef9 4307
0851de06
AB		 4308 if (atomic_read(&clp->cl_count) > 1)
4309 nfs4_schedule_state_renewal(clp);
4310 nfs_put_client(clp);
9bc4e3ca 4311 kfree(data);
dc96aef9
AB		 4312}
4313
9bc4e3ca 4314static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4315{
9bc4e3ca
CL		 4316 struct nfs4_renewdata *data = calldata;
4317 struct nfs_client *clp = data->client;
4318 unsigned long timestamp = data->timestamp;
1da177e4 4319
c6d01c6f 4320 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4321 switch (task->tk_status) {
4322 case 0:
4323 break;
4324 case -NFS4ERR_LEASE_MOVED:
4325 nfs4_schedule_lease_moved_recovery(clp);
4326 break;
4327 default:
95baa25c 4328 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4329 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4330 return;
4331 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4332 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4333 return;
4334 }
4335 nfs4_schedule_path_down_recovery(clp);
1da177e4 4336 }
452e9352 4337 do_renew_lease(clp, timestamp);
1da177e4
LT		 4338}
4339
963d8fe5
TM		 4340static const struct rpc_call_ops nfs4_renew_ops = {
4341 .rpc_call_done = nfs4_renew_done,
dc96aef9 4342 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4343};
4344
2f60ea6b 4345static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4346{
4347 struct rpc_message msg = {
4348 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4349 .rpc_argp = clp,
b4454fe1 4350 .rpc_cred = cred,
1da177e4 4351 };
9bc4e3ca 4352 struct nfs4_renewdata *data;
1da177e4 4353
2f60ea6b
TM		 4354 if (renew_flags == 0)
4355 return 0;
0851de06
AB		 4356 if (!atomic_inc_not_zero(&clp->cl_count))
4357 return -EIO;
b569ad34 4358 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4359 if (data == NULL)
4360 return -ENOMEM;
4361 data->client = clp;
4362 data->timestamp = jiffies;
bc7a05ca 4363 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4364 &nfs4_renew_ops, data);
1da177e4
LT		 4365}
4366
8534d4ec 4367static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4368{
4369 struct rpc_message msg = {
4370 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4371 .rpc_argp = clp,
b4454fe1 4372 .rpc_cred = cred,
1da177e4
LT		 4373 };
4374 unsigned long now = jiffies;
4375 int status;
4376
bc7a05ca 4377 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4378 if (status < 0)
4379 return status;
452e9352 4380 do_renew_lease(clp, now);
1da177e4
LT		 4381 return 0;
4382}
4383
aa1870af
BF		 4384static inline int nfs4_server_supports_acls(struct nfs_server *server)
4385{
7dd7d959 4386 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4387}
4388
21f498c2
TM		 4389/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4390 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4391 * the stack.
4392 */
21f498c2 4393#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4394
e9e3d724
NH		 4395static int buf_to_pages_noslab(const void *buf, size_t buflen,
4396 struct page **pages, unsigned int *pgbase)
4397{
4398 struct page *newpage, **spages;
4399 int rc = 0;
4400 size_t len;
4401 spages = pages;
4402
4403 do {
21f498c2 4404 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4405 newpage = alloc_page(GFP_KERNEL);
4406
4407 if (newpage == NULL)
4408 goto unwind;
4409 memcpy(page_address(newpage), buf, len);
4410 buf += len;
4411 buflen -= len;
4412 *pages++ = newpage;
4413 rc++;
4414 } while (buflen != 0);
4415
4416 return rc;
4417
4418unwind:
4419 for(; rc > 0; rc--)
4420 __free_page(spages[rc-1]);
4421 return -ENOMEM;
4422}
4423
e50a1c2e
BF		 4424struct nfs4_cached_acl {
4425 int cached;
4426 size_t len;
3e9d4154 4427 char data[0];
e50a1c2e
BF		 4428};
4429
4430static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4431{
4432 struct nfs_inode *nfsi = NFS_I(inode);
4433
4434 spin_lock(&inode->i_lock);
4435 kfree(nfsi->nfs4_acl);
4436 nfsi->nfs4_acl = acl;
4437 spin_unlock(&inode->i_lock);
4438}
4439
4440static void nfs4_zap_acl_attr(struct inode *inode)
4441{
4442 nfs4_set_cached_acl(inode, NULL);
4443}
4444
4445static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4446{
4447 struct nfs_inode *nfsi = NFS_I(inode);
4448 struct nfs4_cached_acl *acl;
4449 int ret = -ENOENT;
4450
4451 spin_lock(&inode->i_lock);
4452 acl = nfsi->nfs4_acl;
4453 if (acl == NULL)
4454 goto out;
4455 if (buf == NULL) /* user is just asking for length */
4456 goto out_len;
4457 if (acl->cached == 0)
4458 goto out;
4459 ret = -ERANGE; /* see getxattr(2) man page */
4460 if (acl->len > buflen)
4461 goto out;
4462 memcpy(buf, acl->data, acl->len);
4463out_len:
4464 ret = acl->len;
4465out:
4466 spin_unlock(&inode->i_lock);
4467 return ret;
4468}
4469
5794d21e 4470static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4471{
4472 struct nfs4_cached_acl *acl;
b291f1b1 4473 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4474
1f1ea6c2 4475 if (buflen <= PAGE_SIZE) {
b291f1b1 4476 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4477 if (acl == NULL)
4478 goto out;
4479 acl->cached = 1;
5794d21e 4480 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4481 } else {
4482 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4483 if (acl == NULL)
4484 goto out;
4485 acl->cached = 0;
4486 }
4487 acl->len = acl_len;
4488out:
4489 nfs4_set_cached_acl(inode, acl);
4490}
4491
bf118a34
AA		 4492/*
4493 * The getxattr API returns the required buffer length when called with a
4494 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4495 * the required buf. On a NULL buf, we send a page of data to the server
4496 * guessing that the ACL request can be serviced by a page. If so, we cache
4497 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4498 * the cache. If not so, we throw away the page, and cache the required
4499 * length. The next getxattr call will then produce another round trip to
4500 * the server, this time with the input buf of the required size.
4501 */
16b4289c 4502static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4503{
bf118a34 4504 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4505 struct nfs_getaclargs args = {
4506 .fh = NFS_FH(inode),
4507 .acl_pages = pages,
4508 .acl_len = buflen,
4509 };
663c79b3
BH		 4510 struct nfs_getaclres res = {
4511 .acl_len = buflen,
4512 };
aa1870af
BF		 4513 struct rpc_message msg = {
4514 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4515 .rpc_argp = &args,
663c79b3 4516 .rpc_resp = &res,
aa1870af 4517 };
21f498c2
TM		 4518 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4519 int ret = -ENOMEM, i;
aa1870af 4520
bf118a34
AA		 4521 /* As long as we're doing a round trip to the server anyway,
4522 * let's be prepared for a page of acl data. */
4523 if (npages == 0)
4524 npages = 1;
21f498c2
TM		 4525 if (npages > ARRAY_SIZE(pages))
4526 return -ERANGE;
5a006899 4527
bf118a34
AA		 4528 for (i = 0; i < npages; i++) {
4529 pages[i] = alloc_page(GFP_KERNEL);
4530 if (!pages[i])
4531 goto out_free;
e50a1c2e 4532 }
5a006899
SP		 4533
4534 /* for decoding across pages */
4535 res.acl_scratch = alloc_page(GFP_KERNEL);
4536 if (!res.acl_scratch)
4537 goto out_free;
4538
bf118a34
AA		 4539 args.acl_len = npages * PAGE_SIZE;
4540 args.acl_pgbase = 0;
5a006899 4541
de040bec 4542 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4543 __func__, buf, buflen, npages, args.acl_len);
4544 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4545 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4546 if (ret)
4547 goto out_free;
bf118a34 4548
1f1ea6c2
TM		 4549 /* Handle the case where the passed-in buffer is too short */
4550 if (res.acl_flags & NFS4_ACL_TRUNC) {
4551 /* Did the user only issue a request for the acl length? */
4552 if (buf == NULL)
4553 goto out_ok;
e50a1c2e 4554 ret = -ERANGE;
1f1ea6c2 4555 goto out_free;
e50a1c2e 4556 }
1f1ea6c2 4557 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4558 if (buf) {
4559 if (res.acl_len > buflen) {
4560 ret = -ERANGE;
4561 goto out_free;
4562 }
1f1ea6c2 4563 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4564 }
1f1ea6c2
TM		 4565out_ok:
4566 ret = res.acl_len;
e50a1c2e 4567out_free:
bf118a34
AA		 4568 for (i = 0; i < npages; i++)
4569 if (pages[i])
4570 __free_page(pages[i]);
331818f1
TM		 4571 if (res.acl_scratch)
4572 __free_page(res.acl_scratch);
aa1870af
BF		 4573 return ret;
4574}
4575
16b4289c
TM		 4576static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4577{
4578 struct nfs4_exception exception = { };
4579 ssize_t ret;
4580 do {
4581 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4582 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4583 if (ret >= 0)
4584 break;
4585 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4586 } while (exception.retry);
4587 return ret;
4588}
4589
e50a1c2e
BF		 4590static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4591{
4592 struct nfs_server *server = NFS_SERVER(inode);
4593 int ret;
4594
4595 if (!nfs4_server_supports_acls(server))
4596 return -EOPNOTSUPP;
4597 ret = nfs_revalidate_inode(server, inode);
4598 if (ret < 0)
4599 return ret;
08a22b39
AK		 4600 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4601 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4602 ret = nfs4_read_cached_acl(inode, buf, buflen);
4603 if (ret != -ENOENT)
bf118a34
AA		 4604 /* -ENOENT is returned if there is no ACL or if there is an ACL
4605 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4606 return ret;
4607 return nfs4_get_acl_uncached(inode, buf, buflen);
4608}
4609
16b4289c 4610static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4611{
4612 struct nfs_server *server = NFS_SERVER(inode);
4613 struct page *pages[NFS4ACL_MAXPAGES];
4614 struct nfs_setaclargs arg = {
4615 .fh = NFS_FH(inode),
4616 .acl_pages = pages,
4617 .acl_len = buflen,
4618 };
73c403a9 4619 struct nfs_setaclres res;
4b580ee3
BF		 4620 struct rpc_message msg = {
4621 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4622 .rpc_argp = &arg,
73c403a9 4623 .rpc_resp = &res,
4b580ee3 4624 };
21f498c2 4625 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4626 int ret, i;
4b580ee3
BF		 4627
4628 if (!nfs4_server_supports_acls(server))
4629 return -EOPNOTSUPP;
21f498c2
TM		 4630 if (npages > ARRAY_SIZE(pages))
4631 return -ERANGE;
e9e3d724
NH		 4632 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4633 if (i < 0)
4634 return i;
57ec14c5 4635 nfs4_inode_return_delegation(inode);
7c513058 4636 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4637
4638 /*
4639 * Free each page after tx, so the only ref left is
4640 * held by the network stack
4641 */
4642 for (; i > 0; i--)
4643 put_page(pages[i-1]);
4644
08a22b39
AK		 4645 /*
4646 * Acl update can result in inode attribute update.
4647 * so mark the attribute cache invalid.
4648 */
4649 spin_lock(&inode->i_lock);
4650 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4651 spin_unlock(&inode->i_lock);
f41f7418
TM		 4652 nfs_access_zap_cache(inode);
4653 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4654 return ret;
4655}
4656
16b4289c
TM		 4657static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4658{
4659 struct nfs4_exception exception = { };
4660 int err;
4661 do {
c1578b76
TM		 4662 err = __nfs4_proc_set_acl(inode, buf, buflen);
4663 trace_nfs4_set_acl(inode, err);
4664 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4665 &exception);
4666 } while (exception.retry);
4667 return err;
4668}
4669
aa9c2669
DQ		 4670#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4671static int _nfs4_get_security_label(struct inode *inode, void *buf,
4672 size_t buflen)
4673{
4674 struct nfs_server *server = NFS_SERVER(inode);
4675 struct nfs_fattr fattr;
4676 struct nfs4_label label = {0, 0, buflen, buf};
4677
4678 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4679 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4680 .fh = NFS_FH(inode),
4681 .bitmask = bitmask,
4682 };
4683 struct nfs4_getattr_res res = {
4684 .fattr = &fattr,
4685 .label = &label,
4686 .server = server,
4687 };
4688 struct rpc_message msg = {
4689 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4690 .rpc_argp = &arg,
aa9c2669
DQ		 4691 .rpc_resp = &res,
4692 };
4693 int ret;
4694
4695 nfs_fattr_init(&fattr);
4696
fcb63a9b 4697 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4698 if (ret)
4699 return ret;
4700 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4701 return -ENOENT;
4702 if (buflen < label.len)
4703 return -ERANGE;
4704 return 0;
4705}
4706
4707static int nfs4_get_security_label(struct inode *inode, void *buf,
4708 size_t buflen)
4709{
4710 struct nfs4_exception exception = { };
4711 int err;
4712
4713 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4714 return -EOPNOTSUPP;
4715
4716 do {
c1578b76
TM		 4717 err = _nfs4_get_security_label(inode, buf, buflen);
4718 trace_nfs4_get_security_label(inode, err);
4719 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4720 &exception);
4721 } while (exception.retry);
4722 return err;
4723}
4724
4725static int _nfs4_do_set_security_label(struct inode *inode,
4726 struct nfs4_label *ilabel,
4727 struct nfs_fattr *fattr,
4728 struct nfs4_label *olabel)
4729{
4730
4731 struct iattr sattr = {0};
4732 struct nfs_server *server = NFS_SERVER(inode);
4733 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4734 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4735 .fh = NFS_FH(inode),
4736 .iap = &sattr,
4737 .server = server,
4738 .bitmask = bitmask,
4739 .label = ilabel,
4740 };
4741 struct nfs_setattrres res = {
4742 .fattr = fattr,
4743 .label = olabel,
4744 .server = server,
4745 };
4746 struct rpc_message msg = {
4747 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4748 .rpc_argp = &arg,
aa9c2669
DQ		 4749 .rpc_resp = &res,
4750 };
4751 int status;
4752
12207f69 4753 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4754
12207f69 4755 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4756 if (status)
4757 dprintk("%s failed: %d\n", __func__, status);
4758
4759 return status;
4760}
4761
4762static int nfs4_do_set_security_label(struct inode *inode,
4763 struct nfs4_label *ilabel,
4764 struct nfs_fattr *fattr,
4765 struct nfs4_label *olabel)
4766{
4767 struct nfs4_exception exception = { };
4768 int err;
4769
4770 do {
c1578b76
TM		 4771 err = _nfs4_do_set_security_label(inode, ilabel,
4772 fattr, olabel);
4773 trace_nfs4_set_security_label(inode, err);
4774 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4775 &exception);
4776 } while (exception.retry);
4777 return err;
4778}
4779
4780static int
4781nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4782{
4783 struct nfs4_label ilabel, *olabel = NULL;
4784 struct nfs_fattr fattr;
4785 struct rpc_cred *cred;
4786 struct inode *inode = dentry->d_inode;
4787 int status;
4788
4789 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4790 return -EOPNOTSUPP;
4791
4792 nfs_fattr_init(&fattr);
4793
4794 ilabel.pi = 0;
4795 ilabel.lfs = 0;
4796 ilabel.label = (char *)buf;
4797 ilabel.len = buflen;
4798
4799 cred = rpc_lookup_cred();
4800 if (IS_ERR(cred))
4801 return PTR_ERR(cred);
4802
4803 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4804 if (IS_ERR(olabel)) {
4805 status = -PTR_ERR(olabel);
4806 goto out;
4807 }
4808
4809 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4810 if (status == 0)
4811 nfs_setsecurity(inode, &fattr, olabel);
4812
4813 nfs4_label_free(olabel);
4814out:
4815 put_rpccred(cred);
4816 return status;
4817}
4818#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4819
4820
1da177e4 4821static int
8478eaa1
N		 4822nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4823 struct nfs4_state *state, long *timeout)
1da177e4 4824{
aa5190d0
TM		 4825 struct nfs_client *clp = server->nfs_client;
4826
4827 if (task->tk_status >= 0)
1da177e4
LT		 4828 return 0;
4829 switch(task->tk_status) {
a1d0b5ee 4830 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4831 case -NFS4ERR_ADMIN_REVOKED:
4832 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4833 if (state == NULL)
4834 break;
4835 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4836 case -NFS4ERR_OPENMODE:
4837 if (state == NULL)
4838 break;
5d422301 4839 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4840 goto recovery_failed;
0400a6b0 4841 goto wait_on_recovery;
0ced63d1 4842 case -NFS4ERR_EXPIRED:
5d422301
TM		 4843 if (state != NULL) {
4844 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4845 goto recovery_failed;
5d422301 4846 }
1da177e4 4847 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4848 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4849 nfs4_schedule_lease_recovery(clp);
4850 goto wait_on_recovery;
519ae255
CL		 4851 case -NFS4ERR_MOVED:
4852 if (nfs4_schedule_migration_recovery(server) < 0)
4853 goto recovery_failed;
4854 goto wait_on_recovery;
8ef2f8d4
CL		 4855 case -NFS4ERR_LEASE_MOVED:
4856 nfs4_schedule_lease_moved_recovery(clp);
4857 goto wait_on_recovery;
4745e315
AA		 4858#if defined(CONFIG_NFS_V4_1)
4859 case -NFS4ERR_BADSESSION:
4860 case -NFS4ERR_BADSLOT:
4861 case -NFS4ERR_BAD_HIGH_SLOT:
4862 case -NFS4ERR_DEADSESSION:
4863 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4864 case -NFS4ERR_SEQ_FALSE_RETRY:
4865 case -NFS4ERR_SEQ_MISORDERED:
4866 dprintk("%s ERROR %d, Reset session\n", __func__,
4867 task->tk_status);
9f594791 4868 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4869 goto wait_on_recovery;
4745e315 4870#endif /* CONFIG_NFS_V4_1 */
1da177e4 4871 case -NFS4ERR_DELAY:
aa5190d0 4872 nfs_inc_server_stats(server, NFSIOS_DELAY);
8478eaa1
N		 4873 rpc_delay(task, nfs4_update_delay(timeout));
4874 goto restart_call;
006ea73e 4875 case -NFS4ERR_GRACE:
1da177e4 4876 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4877 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4878 case -NFS4ERR_OLD_STATEID:
f1478c13 4879 goto restart_call;
1da177e4
LT		 4880 }
4881 task->tk_status = nfs4_map_errors(task->tk_status);
4882 return 0;
9f51a78e 4883recovery_failed:
5d422301
TM		 4884 task->tk_status = -EIO;
4885 return 0;
0400a6b0 4886wait_on_recovery:
a2c0b9e2 4887 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4888 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4889 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4890 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4891 goto recovery_failed;
f1478c13 4892restart_call:
a2c0b9e2
TM		 4893 task->tk_status = 0;
4894 return -EAGAIN;
1da177e4
LT		 4895}
4896
f092075d
CL		 4897static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4898 nfs4_verifier *bootverf)
cd93710e
CL		 4899{
4900 __be32 verf[2];
4901
2c820d9a
CL		 4902 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4903 /* An impossible timestamp guarantees this value
4904 * will never match a generated boot time. */
4905 verf[0] = 0;
17f26b12 4906 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4907 } else {
f092075d 4908 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4909 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4910 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4911 }
cd93710e
CL		 4912 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4913}
4914
e984a55a
CL		 4915static unsigned int
4916nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4917 char *buf, size_t len)
4918{
4919 unsigned int result;
4920
4921 rcu_read_lock();
4922 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4923 clp->cl_ipaddr,
4924 rpc_peeraddr2str(clp->cl_rpcclient,
4925 RPC_DISPLAY_ADDR),
4926 rpc_peeraddr2str(clp->cl_rpcclient,
4927 RPC_DISPLAY_PROTO));
4928 rcu_read_unlock();
4929 return result;
4930}
4931
4932static unsigned int
4933nfs4_init_uniform_client_string(const struct nfs_client *clp,
4934 char *buf, size_t len)
4935{
55b59293 4936 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4937
4938 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4939 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4940 clp->rpc_ops->version,
4941 clp->cl_minorversion,
4942 nfs4_client_id_uniquifier,
4943 nodename);
e984a55a
CL		 4944 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4945 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4946 nodename);
e984a55a
CL		 4947}
4948
706cb8db
CL		 4949/*
4950 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
4951 * services. Advertise one based on the address family of the
4952 * clientaddr.
4953 */
4954static unsigned int
4955nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
4956{
4957 if (strchr(clp->cl_ipaddr, ':') != NULL)
4958 return scnprintf(buf, len, "tcp6");
4959 else
4960 return scnprintf(buf, len, "tcp");
4961}
4962
f11b2a1c
JL		 4963static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
4964{
4965 struct nfs4_setclientid *sc = calldata;
4966
4967 if (task->tk_status == 0)
4968 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
4969}
4970
4971static const struct rpc_call_ops nfs4_setclientid_ops = {
4972 .rpc_call_done = nfs4_setclientid_done,
4973};
4974
6bbb4ae8
CL		 4975/**
4976 * nfs4_proc_setclientid - Negotiate client ID
4977 * @clp: state data structure
4978 * @program: RPC program for NFSv4 callback service
4979 * @port: IP port number for NFS4 callback service
4980 * @cred: RPC credential to use for this call
4981 * @res: where to place the result
4982 *
4983 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4984 */
bb8b27e5
TM		 4985int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4986 unsigned short port, struct rpc_cred *cred,
4987 struct nfs4_setclientid_res *res)
1da177e4
LT		 4988{
4989 nfs4_verifier sc_verifier;
4990 struct nfs4_setclientid setclientid = {
4991 .sc_verifier = &sc_verifier,
4992 .sc_prog = program,
f4eecd5d 4993 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4994 };
4995 struct rpc_message msg = {
4996 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4997 .rpc_argp = &setclientid,
bb8b27e5 4998 .rpc_resp = res,
286d7d6a 4999 .rpc_cred = cred,
1da177e4 5000 };
f11b2a1c
JL		 5001 struct rpc_task *task;
5002 struct rpc_task_setup task_setup_data = {
5003 .rpc_client = clp->cl_rpcclient,
5004 .rpc_message = &msg,
5005 .callback_ops = &nfs4_setclientid_ops,
5006 .callback_data = &setclientid,
5007 .flags = RPC_TASK_TIMEOUT,
5008 };
6bbb4ae8 5009 int status;
1da177e4 5010
de734831 5011 /* nfs_client_id4 */
f092075d 5012 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 5013 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5014 setclientid.sc_name_len =
5015 nfs4_init_uniform_client_string(clp,
5016 setclientid.sc_name,
5017 sizeof(setclientid.sc_name));
5018 else
5019 setclientid.sc_name_len =
5020 nfs4_init_nonuniform_client_string(clp,
5021 setclientid.sc_name,
5022 sizeof(setclientid.sc_name));
de734831 5023 /* cb_client4 */
706cb8db
CL		 5024 setclientid.sc_netid_len =
5025 nfs4_init_callback_netid(clp,
5026 setclientid.sc_netid,
5027 sizeof(setclientid.sc_netid));
de734831 5028 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5029 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5030 clp->cl_ipaddr, port >> 8, port & 255);
5031
6bbb4ae8
CL		 5032 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
5033 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5034 setclientid.sc_name_len, setclientid.sc_name);
f11b2a1c
JL		 5035 task = rpc_run_task(&task_setup_data);
5036 if (IS_ERR(task)) {
5037 status = PTR_ERR(task);
5038 goto out;
5039 }
5040 status = task->tk_status;
5041 if (setclientid.sc_cred) {
5042 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5043 put_rpccred(setclientid.sc_cred);
5044 }
5045 rpc_put_task(task);
5046out:
c6d01c6f 5047 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5048 dprintk("NFS reply setclientid: %d\n", status);
5049 return status;
1da177e4
LT		 5050}
5051
6bbb4ae8
CL		 5052/**
5053 * nfs4_proc_setclientid_confirm - Confirm client ID
5054 * @clp: state data structure
5055 * @res: result of a previous SETCLIENTID
5056 * @cred: RPC credential to use for this call
5057 *
5058 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5059 */
fd954ae1 5060int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5061 struct nfs4_setclientid_res *arg,
5062 struct rpc_cred *cred)
1da177e4 5063{
1da177e4
LT		 5064 struct rpc_message msg = {
5065 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5066 .rpc_argp = arg,
286d7d6a 5067 .rpc_cred = cred,
1da177e4 5068 };
1da177e4
LT		 5069 int status;
5070
6bbb4ae8
CL		 5071 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5072 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5073 clp->cl_clientid);
1bd714f2 5074 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5075 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5076 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5077 return status;
5078}
5079
fe650407
TM		 5080struct nfs4_delegreturndata {
5081 struct nfs4_delegreturnargs args;
fa178f29 5082 struct nfs4_delegreturnres res;
fe650407
TM		 5083 struct nfs_fh fh;
5084 nfs4_stateid stateid;
26e976a8 5085 unsigned long timestamp;
fa178f29 5086 struct nfs_fattr fattr;
fe650407 5087 int rpc_status;
039b756a
PT		 5088 struct inode *inode;
5089 bool roc;
5090 u32 roc_barrier;
fe650407
TM		 5091};
5092
fe650407
TM		 5093static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5094{
5095 struct nfs4_delegreturndata *data = calldata;
938e1010 5096
14516c3a
TM		 5097 if (!nfs4_sequence_done(task, &data->res.seq_res))
5098 return;
938e1010 5099
ca8acf8d 5100 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5101 switch (task->tk_status) {
79708861 5102 case 0:
fa178f29 5103 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5104 case -NFS4ERR_ADMIN_REVOKED:
5105 case -NFS4ERR_DELEG_REVOKED:
5106 case -NFS4ERR_BAD_STATEID:
5107 case -NFS4ERR_OLD_STATEID:
5108 case -NFS4ERR_STALE_STATEID:
5109 case -NFS4ERR_EXPIRED:
5110 task->tk_status = 0;
039b756a
PT		 5111 if (data->roc)
5112 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5113 break;
79708861 5114 default:
8478eaa1
N		 5115 if (nfs4_async_handle_error(task, data->res.server,
5116 NULL, NULL) == -EAGAIN) {
d00c5d43 5117 rpc_restart_call_prepare(task);
79708861
RL		 5118 return;
5119 }
5120 }
5121 data->rpc_status = task->tk_status;
fe650407
TM		 5122}
5123
5124static void nfs4_delegreturn_release(void *calldata)
5125{
039b756a
PT		 5126 struct nfs4_delegreturndata *data = calldata;
5127
5128 if (data->roc)
5129 pnfs_roc_release(data->inode);
fe650407
TM		 5130 kfree(calldata);
5131}
5132
938e1010
AA		 5133static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5134{
5135 struct nfs4_delegreturndata *d_data;
5136
5137 d_data = (struct nfs4_delegreturndata *)data;
5138
039b756a
PT		 5139 if (d_data->roc &&
5140 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5141 return;
5142
d9afbd1b
TM		 5143 nfs4_setup_sequence(d_data->res.server,
5144 &d_data->args.seq_args,
5145 &d_data->res.seq_res,
5146 task);
938e1010 5147}
938e1010 5148
c8d149f3 5149static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5150 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5151 .rpc_call_done = nfs4_delegreturn_done,
5152 .rpc_release = nfs4_delegreturn_release,
5153};
5154
e6f81075 5155static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5156{
5157 struct nfs4_delegreturndata *data;
fa178f29 5158 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5159 struct rpc_task *task;
5138fde0
TM		 5160 struct rpc_message msg = {
5161 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5162 .rpc_cred = cred,
5163 };
c970aa85
TM		 5164 struct rpc_task_setup task_setup_data = {
5165 .rpc_client = server->client,
5138fde0 5166 .rpc_message = &msg,
c970aa85
TM		 5167 .callback_ops = &nfs4_delegreturn_ops,
5168 .flags = RPC_TASK_ASYNC,
5169 };
e6f81075 5170 int status = 0;
fe650407 5171
8535b2be 5172 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5173 if (data == NULL)
5174 return -ENOMEM;
a9c92d6b 5175 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5176 data->args.fhandle = &data->fh;
5177 data->args.stateid = &data->stateid;
9e907fec 5178 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5179 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5180 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5181 data->res.fattr = &data->fattr;
5182 data->res.server = server;
5138fde0 5183 nfs_fattr_init(data->res.fattr);
26e976a8 5184 data->timestamp = jiffies;
fe650407 5185 data->rpc_status = 0;
039b756a
PT		 5186 data->inode = inode;
5187 data->roc = list_empty(&NFS_I(inode)->open_files) ?
5188 pnfs_roc(inode) : false;
fe650407 5189
c970aa85 5190 task_setup_data.callback_data = data;
1174dd1f
TM		 5191 msg.rpc_argp = &data->args;
5192 msg.rpc_resp = &data->res;
c970aa85 5193 task = rpc_run_task(&task_setup_data);
7a1218a2 5194 if (IS_ERR(task))
fe650407 5195 return PTR_ERR(task);
e6f81075
TM		 5196 if (!issync)
5197 goto out;
fe650407 5198 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5199 if (status != 0)
5200 goto out;
5201 status = data->rpc_status;
e144cbcc
TM		 5202 if (status == 0)
5203 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5204 else
5205 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5206out:
e6b3c4db 5207 rpc_put_task(task);
fe650407 5208 return status;
1da177e4
LT		 5209}
5210
e6f81075 5211int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5212{
5213 struct nfs_server *server = NFS_SERVER(inode);
5214 struct nfs4_exception exception = { };
5215 int err;
5216 do {
e6f81075 5217 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5218 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5219 switch (err) {
5220 case -NFS4ERR_STALE_STATEID:
5221 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5222 case 0:
5223 return 0;
5224 }
5225 err = nfs4_handle_exception(server, err, &exception);
5226 } while (exception.retry);
5227 return err;
5228}
5229
5230#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5231#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5232
5233/*
5234 * sleep, with exponential backoff, and retry the LOCK operation.
5235 */
5236static unsigned long
5237nfs4_set_lock_task_retry(unsigned long timeout)
5238{
416ad3c9 5239 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5240 timeout <<= 1;
5241 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5242 return NFS4_LOCK_MAXTIMEOUT;
5243 return timeout;
5244}
5245
1da177e4
LT		 5246static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5247{
5248 struct inode *inode = state->inode;
5249 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5250 struct nfs_client *clp = server->nfs_client;
911d1aaf 5251 struct nfs_lockt_args arg = {
1da177e4 5252 .fh = NFS_FH(inode),
911d1aaf 5253 .fl = request,
1da177e4 5254 };
911d1aaf
TM		 5255 struct nfs_lockt_res res = {
5256 .denied = request,
1da177e4
LT		 5257 };
5258 struct rpc_message msg = {
5259 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5260 .rpc_argp = &arg,
5261 .rpc_resp = &res,
5262 .rpc_cred = state->owner->so_cred,
5263 };
1da177e4
LT		 5264 struct nfs4_lock_state *lsp;
5265 int status;
5266
911d1aaf 5267 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5268 status = nfs4_set_lock_state(state, request);
5269 if (status != 0)
5270 goto out;
5271 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5272 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5273 arg.lock_owner.s_dev = server->s_dev;
7c513058 5274 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5275 switch (status) {
5276 case 0:
5277 request->fl_type = F_UNLCK;
5278 break;
5279 case -NFS4ERR_DENIED:
5280 status = 0;
1da177e4 5281 }
70cc6487 5282 request->fl_ops->fl_release_private(request);
a6f951dd 5283 request->fl_ops = NULL;
8d0a8a9d 5284out:
1da177e4
LT		 5285 return status;
5286}
5287
5288static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5289{
5290 struct nfs4_exception exception = { };
5291 int err;
5292
5293 do {
d1b748a5
TM		 5294 err = _nfs4_proc_getlk(state, cmd, request);
5295 trace_nfs4_get_lock(request, state, cmd, err);
5296 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5297 &exception);
5298 } while (exception.retry);
5299 return err;
5300}
5301
5302static int do_vfs_lock(struct file *file, struct file_lock *fl)
5303{
5304 int res = 0;
5305 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5306 case FL_POSIX:
5307 res = posix_lock_file_wait(file, fl);
5308 break;
5309 case FL_FLOCK:
5310 res = flock_lock_file_wait(file, fl);
5311 break;
5312 default:
5313 BUG();
5314 }
1da177e4
LT		 5315 return res;
5316}
5317
faf5f49c 5318struct nfs4_unlockdata {
911d1aaf
TM		 5319 struct nfs_locku_args arg;
5320 struct nfs_locku_res res;
faf5f49c
TM		 5321 struct nfs4_lock_state *lsp;
5322 struct nfs_open_context *ctx;
911d1aaf
TM		 5323 struct file_lock fl;
5324 const struct nfs_server *server;
26e976a8 5325 unsigned long timestamp;
faf5f49c
TM		 5326};
5327
911d1aaf
TM		 5328static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5329 struct nfs_open_context *ctx,
5330 struct nfs4_lock_state *lsp,
5331 struct nfs_seqid *seqid)
5332{
5333 struct nfs4_unlockdata *p;
5334 struct inode *inode = lsp->ls_state->inode;
5335
8535b2be 5336 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5337 if (p == NULL)
5338 return NULL;
5339 p->arg.fh = NFS_FH(inode);
5340 p->arg.fl = &p->fl;
5341 p->arg.seqid = seqid;
c1d51931 5342 p->res.seqid = seqid;
911d1aaf
TM		 5343 p->arg.stateid = &lsp->ls_stateid;
5344 p->lsp = lsp;
5345 atomic_inc(&lsp->ls_count);
5346 /* Ensure we don't close file until we're done freeing locks! */
5347 p->ctx = get_nfs_open_context(ctx);
5348 memcpy(&p->fl, fl, sizeof(p->fl));
5349 p->server = NFS_SERVER(inode);
5350 return p;
5351}
5352
06f814a3 5353static void nfs4_locku_release_calldata(void *data)
faf5f49c 5354{
963d8fe5 5355 struct nfs4_unlockdata *calldata = data;
911d1aaf 5356 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5357 nfs4_put_lock_state(calldata->lsp);
5358 put_nfs_open_context(calldata->ctx);
5359 kfree(calldata);
faf5f49c
TM		 5360}
5361
963d8fe5 5362static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5363{
963d8fe5 5364 struct nfs4_unlockdata *calldata = data;
faf5f49c 5365
14516c3a
TM		 5366 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5367 return;
faf5f49c
TM		 5368 switch (task->tk_status) {
5369 case 0:
f597c537
TM		 5370 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5371 &calldata->res.stateid);
26e976a8 5372 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5373 break;
9e33bed5
TM		 5374 case -NFS4ERR_BAD_STATEID:
5375 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5376 case -NFS4ERR_STALE_STATEID:
5377 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5378 break;
5379 default:
8478eaa1
N		 5380 if (nfs4_async_handle_error(task, calldata->server,
5381 NULL, NULL) == -EAGAIN)
d00c5d43 5382 rpc_restart_call_prepare(task);
faf5f49c 5383 }
2b1bc308 5384 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5385}
5386
4ce70ada 5387static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5388{
4ce70ada 5389 struct nfs4_unlockdata *calldata = data;
faf5f49c 5390
911d1aaf 5391 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5392 goto out_wait;
795a88c9 5393 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5394 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5395 goto out_no_action;
faf5f49c 5396 }
26e976a8 5397 calldata->timestamp = jiffies;
035168ab 5398 if (nfs4_setup_sequence(calldata->server,
a893693c 5399 &calldata->arg.seq_args,
2240a9e2
TM		 5400 &calldata->res.seq_res,
5401 task) != 0)
5402 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5403 return;
5404out_no_action:
5405 task->tk_action = NULL;
5406out_wait:
5407 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5408}
5409
963d8fe5 5410static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5411 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5412 .rpc_call_done = nfs4_locku_done,
06f814a3 5413 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5414};
5415
a5d16a4d
TM		 5416static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5417 struct nfs_open_context *ctx,
5418 struct nfs4_lock_state *lsp,
5419 struct nfs_seqid *seqid)
5420{
5421 struct nfs4_unlockdata *data;
5138fde0
TM		 5422 struct rpc_message msg = {
5423 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5424 .rpc_cred = ctx->cred,
5425 };
c970aa85
TM		 5426 struct rpc_task_setup task_setup_data = {
5427 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5428 .rpc_message = &msg,
c970aa85 5429 .callback_ops = &nfs4_locku_ops,
101070ca 5430 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5431 .flags = RPC_TASK_ASYNC,
5432 };
a5d16a4d 5433
fa940720
WAA		 5434 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5435 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5436
137d6aca
FF		 5437 /* Ensure this is an unlock - when canceling a lock, the
5438 * canceled lock is passed in, and it won't be an unlock.
5439 */
5440 fl->fl_type = F_UNLCK;
5441
a5d16a4d
TM		 5442 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5443 if (data == NULL) {
5444 nfs_free_seqid(seqid);
5445 return ERR_PTR(-ENOMEM);
5446 }
5447
a9c92d6b 5448 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5449 msg.rpc_argp = &data->arg;
5450 msg.rpc_resp = &data->res;
c970aa85
TM		 5451 task_setup_data.callback_data = data;
5452 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5453}
5454
faf5f49c
TM		 5455static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5456{
65b62a29
TM		 5457 struct inode *inode = state->inode;
5458 struct nfs4_state_owner *sp = state->owner;
5459 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5460 struct nfs_seqid *seqid;
1da177e4 5461 struct nfs4_lock_state *lsp;
06f814a3
TM		 5462 struct rpc_task *task;
5463 int status = 0;
536ff0f8 5464 unsigned char fl_flags = request->fl_flags;
faf5f49c 5465
8d0a8a9d 5466 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5467 /* Unlock _before_ we do the RPC call */
5468 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5469 /* Exclude nfs_delegation_claim_locks() */
5470 mutex_lock(&sp->so_delegreturn_mutex);
5471 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5472 down_read(&nfsi->rwsem);
5473 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5474 up_read(&nfsi->rwsem);
65b62a29 5475 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5476 goto out;
19e03c57
TM		 5477 }
5478 up_read(&nfsi->rwsem);
65b62a29 5479 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5480 if (status != 0)
9b073574
TM		 5481 goto out;
5482 /* Is this a delegated lock? */
8d0a8a9d 5483 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5484 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5485 goto out;
8535b2be 5486 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5487 status = -ENOMEM;
911d1aaf 5488 if (seqid == NULL)
9b073574 5489 goto out;
cd3758e3 5490 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5491 status = PTR_ERR(task);
5492 if (IS_ERR(task))
9b073574 5493 goto out;
a5d16a4d 5494 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5495 rpc_put_task(task);
9b073574 5496out:
536ff0f8 5497 request->fl_flags = fl_flags;
d1b748a5 5498 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5499 return status;
5500}
5501
a5d16a4d
TM		 5502struct nfs4_lockdata {
5503 struct nfs_lock_args arg;
5504 struct nfs_lock_res res;
5505 struct nfs4_lock_state *lsp;
5506 struct nfs_open_context *ctx;
5507 struct file_lock fl;
26e976a8 5508 unsigned long timestamp;
a5d16a4d
TM		 5509 int rpc_status;
5510 int cancelled;
66179efe 5511 struct nfs_server *server;
a5d16a4d
TM		 5512};
5513
5514static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5515 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5516 gfp_t gfp_mask)
1da177e4 5517{
a5d16a4d
TM		 5518 struct nfs4_lockdata *p;
5519 struct inode *inode = lsp->ls_state->inode;
1da177e4 5520 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5521
8535b2be 5522 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5523 if (p == NULL)
5524 return NULL;
5525
5526 p->arg.fh = NFS_FH(inode);
5527 p->arg.fl = &p->fl;
8535b2be 5528 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5529 if (p->arg.open_seqid == NULL)
5530 goto out_free;
8535b2be 5531 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5532 if (p->arg.lock_seqid == NULL)
2f74c0a0 5533 goto out_free_seqid;
a5d16a4d 5534 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5535 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5536 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5537 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5538 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5539 p->lsp = lsp;
66179efe 5540 p->server = server;
a5d16a4d
TM		 5541 atomic_inc(&lsp->ls_count);
5542 p->ctx = get_nfs_open_context(ctx);
5543 memcpy(&p->fl, fl, sizeof(p->fl));
5544 return p;
2f74c0a0
TM		 5545out_free_seqid:
5546 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5547out_free:
5548 kfree(p);
5549 return NULL;
5550}
5551
5552static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5553{
5554 struct nfs4_lockdata *data = calldata;
5555 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5556
3110ff80 5557 dprintk("%s: begin!\n", __func__);
2f74c0a0 5558 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5559 goto out_wait;
a5d16a4d
TM		 5560 /* Do we need to do an open_to_lock_owner? */
5561 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5562 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5563 goto out_release_lock_seqid;
8fe72bac 5564 }
8e472f33 5565 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5566 data->arg.new_lock_owner = 1;
c1d51931 5567 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5568 } else
5569 data->arg.new_lock_owner = 0;
5d422301
TM		 5570 if (!nfs4_valid_open_stateid(state)) {
5571 data->rpc_status = -EBADF;
5572 task->tk_action = NULL;
5573 goto out_release_open_seqid;
5574 }
26e976a8 5575 data->timestamp = jiffies;
035168ab
TM		 5576 if (nfs4_setup_sequence(data->server,
5577 &data->arg.seq_args,
2240a9e2 5578 &data->res.seq_res,
d9afbd1b 5579 task) == 0)
66179efe 5580 return;
5d422301 5581out_release_open_seqid:
2240a9e2
TM		 5582 nfs_release_seqid(data->arg.open_seqid);
5583out_release_lock_seqid:
5584 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5585out_wait:
5586 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5587 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5588}
5589
a5d16a4d
TM		 5590static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5591{
5592 struct nfs4_lockdata *data = calldata;
5593
3110ff80 5594 dprintk("%s: begin!\n", __func__);
a5d16a4d 5595
14516c3a
TM		 5596 if (!nfs4_sequence_done(task, &data->res.seq_res))
5597 return;
66179efe 5598
a5d16a4d 5599 data->rpc_status = task->tk_status;
a5d16a4d 5600 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5601 if (data->rpc_status == 0)
5602 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5603 else
5604 goto out;
5605 }
5606 if (data->rpc_status == 0) {
f597c537 5607 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5608 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5609 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5610 }
a5d16a4d 5611out:
3110ff80 5612 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5613}
5614
5615static void nfs4_lock_release(void *calldata)
5616{
5617 struct nfs4_lockdata *data = calldata;
5618
3110ff80 5619 dprintk("%s: begin!\n", __func__);
2f74c0a0 5620 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5621 if (data->cancelled != 0) {
5622 struct rpc_task *task;
5623 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5624 data->arg.lock_seqid);
5625 if (!IS_ERR(task))
bf294b41 5626 rpc_put_task_async(task);
3110ff80 5627 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5628 } else
5629 nfs_free_seqid(data->arg.lock_seqid);
5630 nfs4_put_lock_state(data->lsp);
5631 put_nfs_open_context(data->ctx);
5632 kfree(data);
3110ff80 5633 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5634}
5635
5636static const struct rpc_call_ops nfs4_lock_ops = {
5637 .rpc_call_prepare = nfs4_lock_prepare,
5638 .rpc_call_done = nfs4_lock_done,
5639 .rpc_release = nfs4_lock_release,
5640};
5641
2bee72a6
TM		 5642static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5643{
2bee72a6
TM		 5644 switch (error) {
5645 case -NFS4ERR_ADMIN_REVOKED:
5646 case -NFS4ERR_BAD_STATEID:
ecac799a 5647 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5648 if (new_lock_owner != 0 ||
795a88c9 5649 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5650 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5651 break;
5652 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5653 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5654 case -NFS4ERR_EXPIRED:
5655 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5656 };
5657}
5658
afe6c27c 5659static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5660{
5661 struct nfs4_lockdata *data;
5662 struct rpc_task *task;
5138fde0
TM		 5663 struct rpc_message msg = {
5664 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5665 .rpc_cred = state->owner->so_cred,
5666 };
c970aa85
TM		 5667 struct rpc_task_setup task_setup_data = {
5668 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5669 .rpc_message = &msg,
c970aa85 5670 .callback_ops = &nfs4_lock_ops,
101070ca 5671 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5672 .flags = RPC_TASK_ASYNC,
5673 };
a5d16a4d
TM		 5674 int ret;
5675
3110ff80 5676 dprintk("%s: begin!\n", __func__);
cd3758e3 5677 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5678 fl->fl_u.nfs4_fl.owner,
5679 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5680 if (data == NULL)
5681 return -ENOMEM;
5682 if (IS_SETLKW(cmd))
5683 data->arg.block = 1;
a9c92d6b 5684 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5685 msg.rpc_argp = &data->arg;
5686 msg.rpc_resp = &data->res;
c970aa85 5687 task_setup_data.callback_data = data;
8fe72bac
TM		 5688 if (recovery_type > NFS_LOCK_NEW) {
5689 if (recovery_type == NFS_LOCK_RECLAIM)
5690 data->arg.reclaim = NFS_LOCK_RECLAIM;
5691 nfs4_set_sequence_privileged(&data->arg.seq_args);
5692 }
c970aa85 5693 task = rpc_run_task(&task_setup_data);
7a1218a2 5694 if (IS_ERR(task))
a5d16a4d 5695 return PTR_ERR(task);
a5d16a4d
TM		 5696 ret = nfs4_wait_for_completion_rpc_task(task);
5697 if (ret == 0) {
5698 ret = data->rpc_status;
2bee72a6
TM		 5699 if (ret)
5700 nfs4_handle_setlk_error(data->server, data->lsp,
5701 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5702 } else
5703 data->cancelled = 1;
e6b3c4db 5704 rpc_put_task(task);
3110ff80 5705 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5706 return ret;
1da177e4
LT		 5707}
5708
5709static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5710{
202b50dc 5711 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5712 struct nfs4_exception exception = {
5713 .inode = state->inode,
5714 };
202b50dc
TM		 5715 int err;
5716
5717 do {
42a2d13e
TM		 5718 /* Cache the lock if possible... */
5719 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5720 return 0;
afe6c27c 5721 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5722 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5723 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5724 break;
5725 nfs4_handle_exception(server, err, &exception);
5726 } while (exception.retry);
5727 return err;
1da177e4
LT		 5728}
5729
5730static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5731{
202b50dc 5732 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5733 struct nfs4_exception exception = {
5734 .inode = state->inode,
5735 };
202b50dc
TM		 5736 int err;
5737
6bfc93ef
TM		 5738 err = nfs4_set_lock_state(state, request);
5739 if (err != 0)
5740 return err;
f6de7a39 5741 if (!recover_lost_locks) {
ef1820f9
N		 5742 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5743 return 0;
5744 }
202b50dc 5745 do {
42a2d13e
TM		 5746 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5747 return 0;
afe6c27c 5748 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5749 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5750 switch (err) {
5751 default:
5752 goto out;
5753 case -NFS4ERR_GRACE:
5754 case -NFS4ERR_DELAY:
5755 nfs4_handle_exception(server, err, &exception);
5756 err = 0;
5757 }
202b50dc 5758 } while (exception.retry);
a9ed2e25 5759out:
202b50dc 5760 return err;
1da177e4
LT		 5761}
5762
f062eb6c 5763#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5764/**
5765 * nfs41_check_expired_locks - possibly free a lock stateid
5766 *
5767 * @state: NFSv4 state for an inode
5768 *
5769 * Returns NFS_OK if recovery for this stateid is now finished.
5770 * Otherwise a negative NFS4ERR value is returned.
5771 */
b01dd1d8 5772static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5773{
eb64cf96 5774 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5775 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5776 struct nfs_server *server = NFS_SERVER(state->inode);
5777
b01dd1d8 5778 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5779 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5780 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5781
5782 status = nfs41_test_stateid(server,
5783 &lsp->ls_stateid,
5784 cred);
08cb47fa 5785 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5786 if (status != NFS_OK) {
3e60ffdd
CL		 5787 /* Free the stateid unless the server
5788 * informs us the stateid is unrecognized. */
89af2739
CL		 5789 if (status != -NFS4ERR_BAD_STATEID)
5790 nfs41_free_stateid(server,
ab7cb0df
TM		 5791 &lsp->ls_stateid,
5792 cred);
795a88c9 5793 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5794 ret = status;
5795 }
5796 }
5797 };
5798
5799 return ret;
5800}
5801
5802static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5803{
5804 int status = NFS_OK;
5805
5806 if (test_bit(LK_STATE_IN_USE, &state->flags))
5807 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5808 if (status != NFS_OK)
5809 status = nfs4_lock_expired(state, request);
5810 return status;
f062eb6c
BS		 5811}
5812#endif
5813
1da177e4
LT		 5814static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5815{
9a99af49 5816 struct nfs4_state_owner *sp = state->owner;
19e03c57 5817 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5818 unsigned char fl_flags = request->fl_flags;
9a99af49 5819 unsigned int seq;
8e469ebd 5820 int status = -ENOLCK;
1da177e4 5821
8e469ebd
TM		 5822 if ((fl_flags & FL_POSIX) &&
5823 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5824 goto out;
6bfc93ef 5825 /* Is this a delegated open? */
6bfc93ef
TM		 5826 status = nfs4_set_lock_state(state, request);
5827 if (status != 0)
5828 goto out;
01c3b861
TM		 5829 request->fl_flags |= FL_ACCESS;
5830 status = do_vfs_lock(request->fl_file, request);
5831 if (status < 0)
5832 goto out;
19e03c57 5833 down_read(&nfsi->rwsem);
01c3b861 5834 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5835 /* Yes: cache locks! */
01c3b861 5836 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5837 request->fl_flags = fl_flags & ~FL_SLEEP;
5838 status = do_vfs_lock(request->fl_file, request);
5839 goto out_unlock;
01c3b861 5840 }
9a99af49
TM		 5841 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5842 up_read(&nfsi->rwsem);
afe6c27c 5843 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5844 if (status != 0)
9a99af49
TM		 5845 goto out;
5846 down_read(&nfsi->rwsem);
5847 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5848 status = -NFS4ERR_DELAY;
01c3b861 5849 goto out_unlock;
9a99af49 5850 }
6bfc93ef 5851 /* Note: we always want to sleep here! */
01c3b861 5852 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5853 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5854 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5855 "manager!\n", __func__);
01c3b861 5856out_unlock:
19e03c57 5857 up_read(&nfsi->rwsem);
01c3b861
TM		 5858out:
5859 request->fl_flags = fl_flags;
1da177e4
LT		 5860 return status;
5861}
5862
5863static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5864{
a1d0b5ee
TM		 5865 struct nfs4_exception exception = {
5866 .state = state,
05ffe24f 5867 .inode = state->inode,
a1d0b5ee 5868 };
1da177e4
LT		 5869 int err;
5870
5871 do {
965b5d67 5872 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5873 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5874 if (err == -NFS4ERR_DENIED)
5875 err = -EAGAIN;
1da177e4 5876 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5877 err, &exception);
1da177e4
LT		 5878 } while (exception.retry);
5879 return err;
5880}
5881
5882static int
5883nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5884{
5885 struct nfs_open_context *ctx;
5886 struct nfs4_state *state;
5887 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5888 int status;
5889
5890 /* verify open state */
cd3758e3 5891 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5892 state = ctx->state;
5893
5894 if (request->fl_start < 0 || request->fl_end < 0)
5895 return -EINVAL;
5896
d953126a
TM		 5897 if (IS_GETLK(cmd)) {
5898 if (state != NULL)
5899 return nfs4_proc_getlk(state, F_GETLK, request);
5900 return 0;
5901 }
1da177e4
LT		 5902
5903 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5904 return -EINVAL;
5905
d953126a
TM		 5906 if (request->fl_type == F_UNLCK) {
5907 if (state != NULL)
5908 return nfs4_proc_unlck(state, cmd, request);
5909 return 0;
5910 }
1da177e4 5911
d953126a
TM		 5912 if (state == NULL)
5913 return -ENOLCK;
55725513
TM		 5914 /*
5915 * Don't rely on the VFS having checked the file open mode,
5916 * since it won't do this for flock() locks.
5917 */
f44106e2 5918 switch (request->fl_type) {
55725513
TM		 5919 case F_RDLCK:
5920 if (!(filp->f_mode & FMODE_READ))
5921 return -EBADF;
5922 break;
5923 case F_WRLCK:
5924 if (!(filp->f_mode & FMODE_WRITE))
5925 return -EBADF;
5926 }
5927
1da177e4
LT		 5928 do {
5929 status = nfs4_proc_setlk(state, cmd, request);
5930 if ((status != -EAGAIN) || IS_SETLK(cmd))
5931 break;
5932 timeout = nfs4_set_lock_task_retry(timeout);
5933 status = -ERESTARTSYS;
5934 if (signalled())
5935 break;
5936 } while(status < 0);
1da177e4
LT		 5937 return status;
5938}
5939
db4f2e63 5940int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5941{
5942 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5943 int err;
5944
5945 err = nfs4_set_lock_state(state, fl);
5946 if (err != 0)
db4f2e63 5947 return err;
4a706fa0 5948 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5949 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5950}
6b3b5496 5951
cf470c3e
TM		 5952struct nfs_release_lockowner_data {
5953 struct nfs4_lock_state *lsp;
5ae67c4f 5954 struct nfs_server *server;
cf470c3e 5955 struct nfs_release_lockowner_args args;
b7e63a10 5956 struct nfs_release_lockowner_res res;
60ea6812 5957 unsigned long timestamp;
cf470c3e
TM		 5958};
5959
fbd4bfd1
CL		 5960static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5961{
5962 struct nfs_release_lockowner_data *data = calldata;
5b53dc88
KM		 5963 struct nfs_server *server = data->server;
5964 nfs40_setup_sequence(server, &data->args.seq_args,
5965 &data->res.seq_res, task);
5966 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 5967 data->timestamp = jiffies;
fbd4bfd1
CL		 5968}
5969
5970static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5971{
5972 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 5973 struct nfs_server *server = data->server;
5974
b7e63a10 5975 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 5976
5977 switch (task->tk_status) {
5978 case 0:
5979 renew_lease(server, data->timestamp);
5980 break;
5981 case -NFS4ERR_STALE_CLIENTID:
5982 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 5983 nfs4_schedule_lease_recovery(server->nfs_client);
5984 break;
60ea6812
CL		 5985 case -NFS4ERR_LEASE_MOVED:
5986 case -NFS4ERR_DELAY:
8478eaa1
N		 5987 if (nfs4_async_handle_error(task, server,
5988 NULL, NULL) == -EAGAIN)
60ea6812
CL		 5989 rpc_restart_call_prepare(task);
5990 }
fbd4bfd1
CL		 5991}
5992
d3c7b7cc
TM		 5993static void nfs4_release_lockowner_release(void *calldata)
5994{
cf470c3e 5995 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5996 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5997 kfree(calldata);
5998}
5999
17280175 6000static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6001 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6002 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6003 .rpc_release = nfs4_release_lockowner_release,
6004};
6005
f1cdae87
JL		 6006static void
6007nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6008{
cf470c3e 6009 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6010 struct rpc_message msg = {
6011 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6012 };
6013
6014 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6015 return;
fbd4bfd1 6016
cf470c3e
TM		 6017 data = kmalloc(sizeof(*data), GFP_NOFS);
6018 if (!data)
f1cdae87 6019 return;
cf470c3e 6020 data->lsp = lsp;
5ae67c4f 6021 data->server = server;
cf470c3e
TM		 6022 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6023 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6024 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6025
cf470c3e 6026 msg.rpc_argp = &data->args;
b7e63a10
TM		 6027 msg.rpc_resp = &data->res;
6028 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6029 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6030}
6031
aa1870af
BF		 6032#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6033
64c2ce8b
AK		 6034static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6035 const void *buf, size_t buflen,
6036 int flags, int type)
6b3b5496 6037{
64c2ce8b
AK		 6038 if (strcmp(key, "") != 0)
6039 return -EINVAL;
4b580ee3 6040
64c2ce8b 6041 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6042}
6043
64c2ce8b
AK		 6044static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6045 void *buf, size_t buflen, int type)
6b3b5496 6046{
64c2ce8b
AK		 6047 if (strcmp(key, "") != 0)
6048 return -EINVAL;
aa1870af 6049
64c2ce8b 6050 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6051}
6052
64c2ce8b
AK		 6053static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6054 size_t list_len, const char *name,
6055 size_t name_len, int type)
6b3b5496 6056{
64c2ce8b 6057 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6058
096455a2
BF		 6059 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
6060 return 0;
64c2ce8b
AK		 6061
6062 if (list && len <= list_len)
6063 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6064 return len;
6b3b5496
BF		 6065}
6066
c9bccef6
DQ		 6067#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6068static inline int nfs4_server_supports_labels(struct nfs_server *server)
6069{
6070 return server->caps & NFS_CAP_SECURITY_LABEL;
6071}
6072
6073static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6074 const void *buf, size_t buflen,
6075 int flags, int type)
6076{
6077 if (security_ismaclabel(key))
6078 return nfs4_set_security_label(dentry, buf, buflen);
6079
6080 return -EOPNOTSUPP;
6081}
6082
6083static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6084 void *buf, size_t buflen, int type)
6085{
6086 if (security_ismaclabel(key))
6087 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
6088 return -EOPNOTSUPP;
6089}
6090
6091static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6092 size_t list_len, const char *name,
6093 size_t name_len, int type)
6094{
6095 size_t len = 0;
6096
6097 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
6098 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
6099 if (list && len <= list_len)
6100 security_inode_listsecurity(dentry->d_inode, list, len);
6101 }
6102 return len;
6103}
6104
6105static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6106 .prefix = XATTR_SECURITY_PREFIX,
6107 .list = nfs4_xattr_list_nfs4_label,
6108 .get = nfs4_xattr_get_nfs4_label,
6109 .set = nfs4_xattr_set_nfs4_label,
6110};
6111#endif
6112
6113
533eb461
AA		 6114/*
6115 * nfs_fhget will use either the mounted_on_fileid or the fileid
6116 */
69aaaae1
TM		 6117static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6118{
533eb461
AA		 6119 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6120 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6121 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6122 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6123 return;
6124
6125 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6126 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6127 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6128 fattr->nlink = 2;
6129}
6130
f05d147f
BS		 6131static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6132 const struct qstr *name,
6133 struct nfs4_fs_locations *fs_locations,
6134 struct page *page)
683b57b4
TM		 6135{
6136 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6137 u32 bitmask[3] = {
361e624f 6138 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6139 };
6140 struct nfs4_fs_locations_arg args = {
6141 .dir_fh = NFS_FH(dir),
c228fd3a 6142 .name = name,
683b57b4
TM		 6143 .page = page,
6144 .bitmask = bitmask,
6145 };
22958463
BH		 6146 struct nfs4_fs_locations_res res = {
6147 .fs_locations = fs_locations,
6148 };
683b57b4
TM		 6149 struct rpc_message msg = {
6150 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6151 .rpc_argp = &args,
22958463 6152 .rpc_resp = &res,
683b57b4
TM		 6153 };
6154 int status;
6155
3110ff80 6156 dprintk("%s: start\n", __func__);
533eb461
AA		 6157
6158 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6159 * is not supported */
6160 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6161 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6162 else
6163 bitmask[0] |= FATTR4_WORD0_FILEID;
6164
c228fd3a 6165 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6166 fs_locations->server = server;
830b8e33 6167 fs_locations->nlocations = 0;
f05d147f 6168 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6169 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6170 return status;
6171}
6172
f05d147f
BS		 6173int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6174 const struct qstr *name,
6175 struct nfs4_fs_locations *fs_locations,
6176 struct page *page)
db0a9593
BS		 6177{
6178 struct nfs4_exception exception = { };
6179 int err;
6180 do {
078ea3df
TM		 6181 err = _nfs4_proc_fs_locations(client, dir, name,
6182 fs_locations, page);
6183 trace_nfs4_get_fs_locations(dir, name, err);
6184 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6185 &exception);
6186 } while (exception.retry);
6187 return err;
6188}
6189
b03d735b
CL		 6190/*
6191 * This operation also signals the server that this client is
6192 * performing migration recovery. The server can stop returning
6193 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6194 * appended to this compound to identify the client ID which is
6195 * performing recovery.
6196 */
6197static int _nfs40_proc_get_locations(struct inode *inode,
6198 struct nfs4_fs_locations *locations,
6199 struct page *page, struct rpc_cred *cred)
6200{
6201 struct nfs_server *server = NFS_SERVER(inode);
6202 struct rpc_clnt *clnt = server->client;
6203 u32 bitmask[2] = {
6204 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6205 };
6206 struct nfs4_fs_locations_arg args = {
6207 .clientid = server->nfs_client->cl_clientid,
6208 .fh = NFS_FH(inode),
6209 .page = page,
6210 .bitmask = bitmask,
6211 .migration = 1, /* skip LOOKUP */
6212 .renew = 1, /* append RENEW */
6213 };
6214 struct nfs4_fs_locations_res res = {
6215 .fs_locations = locations,
6216 .migration = 1,
6217 .renew = 1,
6218 };
6219 struct rpc_message msg = {
6220 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6221 .rpc_argp = &args,
6222 .rpc_resp = &res,
6223 .rpc_cred = cred,
6224 };
6225 unsigned long now = jiffies;
6226 int status;
6227
6228 nfs_fattr_init(&locations->fattr);
6229 locations->server = server;
6230 locations->nlocations = 0;
6231
6232 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6233 nfs4_set_sequence_privileged(&args.seq_args);
6234 status = nfs4_call_sync_sequence(clnt, server, &msg,
6235 &args.seq_args, &res.seq_res);
6236 if (status)
6237 return status;
6238
6239 renew_lease(server, now);
6240 return 0;
6241}
6242
6243#ifdef CONFIG_NFS_V4_1
6244
6245/*
6246 * This operation also signals the server that this client is
6247 * performing migration recovery. The server can stop asserting
6248 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6249 * performing this operation is identified in the SEQUENCE
6250 * operation in this compound.
6251 *
6252 * When the client supports GETATTR(fs_locations_info), it can
6253 * be plumbed in here.
6254 */
6255static int _nfs41_proc_get_locations(struct inode *inode,
6256 struct nfs4_fs_locations *locations,
6257 struct page *page, struct rpc_cred *cred)
6258{
6259 struct nfs_server *server = NFS_SERVER(inode);
6260 struct rpc_clnt *clnt = server->client;
6261 u32 bitmask[2] = {
6262 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6263 };
6264 struct nfs4_fs_locations_arg args = {
6265 .fh = NFS_FH(inode),
6266 .page = page,
6267 .bitmask = bitmask,
6268 .migration = 1, /* skip LOOKUP */
6269 };
6270 struct nfs4_fs_locations_res res = {
6271 .fs_locations = locations,
6272 .migration = 1,
6273 };
6274 struct rpc_message msg = {
6275 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6276 .rpc_argp = &args,
6277 .rpc_resp = &res,
6278 .rpc_cred = cred,
6279 };
6280 int status;
6281
6282 nfs_fattr_init(&locations->fattr);
6283 locations->server = server;
6284 locations->nlocations = 0;
6285
6286 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6287 nfs4_set_sequence_privileged(&args.seq_args);
6288 status = nfs4_call_sync_sequence(clnt, server, &msg,
6289 &args.seq_args, &res.seq_res);
6290 if (status == NFS4_OK &&
6291 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6292 status = -NFS4ERR_LEASE_MOVED;
6293 return status;
6294}
6295
6296#endif /* CONFIG_NFS_V4_1 */
6297
6298/**
6299 * nfs4_proc_get_locations - discover locations for a migrated FSID
6300 * @inode: inode on FSID that is migrating
6301 * @locations: result of query
6302 * @page: buffer
6303 * @cred: credential to use for this operation
6304 *
6305 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6306 * operation failed, or a negative errno if a local error occurred.
6307 *
6308 * On success, "locations" is filled in, but if the server has
6309 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6310 * asserted.
6311 *
6312 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6313 * from this client that require migration recovery.
6314 */
6315int nfs4_proc_get_locations(struct inode *inode,
6316 struct nfs4_fs_locations *locations,
6317 struct page *page, struct rpc_cred *cred)
6318{
6319 struct nfs_server *server = NFS_SERVER(inode);
6320 struct nfs_client *clp = server->nfs_client;
6321 const struct nfs4_mig_recovery_ops *ops =
6322 clp->cl_mvops->mig_recovery_ops;
6323 struct nfs4_exception exception = { };
6324 int status;
6325
6326 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6327 (unsigned long long)server->fsid.major,
6328 (unsigned long long)server->fsid.minor,
6329 clp->cl_hostname);
6330 nfs_display_fhandle(NFS_FH(inode), __func__);
6331
6332 do {
6333 status = ops->get_locations(inode, locations, page, cred);
6334 if (status != -NFS4ERR_DELAY)
6335 break;
6336 nfs4_handle_exception(server, status, &exception);
6337 } while (exception.retry);
6338 return status;
6339}
6340
44c99933
CL		 6341/*
6342 * This operation also signals the server that this client is
6343 * performing "lease moved" recovery. The server can stop
6344 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6345 * is appended to this compound to identify the client ID which is
6346 * performing recovery.
6347 */
6348static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6349{
6350 struct nfs_server *server = NFS_SERVER(inode);
6351 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6352 struct rpc_clnt *clnt = server->client;
6353 struct nfs4_fsid_present_arg args = {
6354 .fh = NFS_FH(inode),
6355 .clientid = clp->cl_clientid,
6356 .renew = 1, /* append RENEW */
6357 };
6358 struct nfs4_fsid_present_res res = {
6359 .renew = 1,
6360 };
6361 struct rpc_message msg = {
6362 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6363 .rpc_argp = &args,
6364 .rpc_resp = &res,
6365 .rpc_cred = cred,
6366 };
6367 unsigned long now = jiffies;
6368 int status;
6369
6370 res.fh = nfs_alloc_fhandle();
6371 if (res.fh == NULL)
6372 return -ENOMEM;
6373
6374 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6375 nfs4_set_sequence_privileged(&args.seq_args);
6376 status = nfs4_call_sync_sequence(clnt, server, &msg,
6377 &args.seq_args, &res.seq_res);
6378 nfs_free_fhandle(res.fh);
6379 if (status)
6380 return status;
6381
6382 do_renew_lease(clp, now);
6383 return 0;
6384}
6385
6386#ifdef CONFIG_NFS_V4_1
6387
6388/*
6389 * This operation also signals the server that this client is
6390 * performing "lease moved" recovery. The server can stop asserting
6391 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6392 * this operation is identified in the SEQUENCE operation in this
6393 * compound.
6394 */
6395static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6396{
6397 struct nfs_server *server = NFS_SERVER(inode);
6398 struct rpc_clnt *clnt = server->client;
6399 struct nfs4_fsid_present_arg args = {
6400 .fh = NFS_FH(inode),
6401 };
6402 struct nfs4_fsid_present_res res = {
6403 };
6404 struct rpc_message msg = {
6405 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6406 .rpc_argp = &args,
6407 .rpc_resp = &res,
6408 .rpc_cred = cred,
6409 };
6410 int status;
6411
6412 res.fh = nfs_alloc_fhandle();
6413 if (res.fh == NULL)
6414 return -ENOMEM;
6415
6416 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6417 nfs4_set_sequence_privileged(&args.seq_args);
6418 status = nfs4_call_sync_sequence(clnt, server, &msg,
6419 &args.seq_args, &res.seq_res);
6420 nfs_free_fhandle(res.fh);
6421 if (status == NFS4_OK &&
6422 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6423 status = -NFS4ERR_LEASE_MOVED;
6424 return status;
6425}
6426
6427#endif /* CONFIG_NFS_V4_1 */
6428
6429/**
6430 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6431 * @inode: inode on FSID to check
6432 * @cred: credential to use for this operation
6433 *
6434 * Server indicates whether the FSID is present, moved, or not
6435 * recognized. This operation is necessary to clear a LEASE_MOVED
6436 * condition for this client ID.
6437 *
6438 * Returns NFS4_OK if the FSID is present on this server,
6439 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6440 * NFS4ERR code if some error occurred on the server, or a
6441 * negative errno if a local failure occurred.
6442 */
6443int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6444{
6445 struct nfs_server *server = NFS_SERVER(inode);
6446 struct nfs_client *clp = server->nfs_client;
6447 const struct nfs4_mig_recovery_ops *ops =
6448 clp->cl_mvops->mig_recovery_ops;
6449 struct nfs4_exception exception = { };
6450 int status;
6451
6452 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6453 (unsigned long long)server->fsid.major,
6454 (unsigned long long)server->fsid.minor,
6455 clp->cl_hostname);
6456 nfs_display_fhandle(NFS_FH(inode), __func__);
6457
6458 do {
6459 status = ops->fsid_present(inode, cred);
6460 if (status != -NFS4ERR_DELAY)
6461 break;
6462 nfs4_handle_exception(server, status, &exception);
6463 } while (exception.retry);
6464 return status;
6465}
6466
5ec16a85 6467/**
a5250def
WAA		 6468 * If 'use_integrity' is true and the state managment nfs_client
6469 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6470 * and the machine credential as per RFC3530bis and RFC5661 Security
6471 * Considerations sections. Otherwise, just use the user cred with the
6472 * filesystem's rpc_client.
5ec16a85 6473 */
a5250def 6474static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6475{
6476 int status;
6477 struct nfs4_secinfo_arg args = {
6478 .dir_fh = NFS_FH(dir),
6479 .name = name,
6480 };
6481 struct nfs4_secinfo_res res = {
6482 .flavors = flavors,
6483 };
6484 struct rpc_message msg = {
6485 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6486 .rpc_argp = &args,
6487 .rpc_resp = &res,
6488 };
a5250def 6489 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6490 struct rpc_cred *cred = NULL;
a5250def
WAA		 6491
6492 if (use_integrity) {
6493 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6494 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6495 msg.rpc_cred = cred;
a5250def 6496 }
5a5ea0d4
BS		 6497
6498 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6499
6500 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6501 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6502
a5250def
WAA		 6503 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6504 &res.seq_res, 0);
5a5ea0d4 6505 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6506
7cb852df
WAA		 6507 if (cred)
6508 put_rpccred(cred);
a5250def 6509
5a5ea0d4
BS		 6510 return status;
6511}
6512
72de53ec
BS		 6513int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6514 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6515{
6516 struct nfs4_exception exception = { };
6517 int err;
6518 do {
a5250def
WAA		 6519 err = -NFS4ERR_WRONGSEC;
6520
6521 /* try to use integrity protection with machine cred */
6522 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6523 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6524
6525 /*
6526 * if unable to use integrity protection, or SECINFO with
6527 * integrity protection returns NFS4ERR_WRONGSEC (which is
6528 * disallowed by spec, but exists in deployed servers) use
6529 * the current filesystem's rpc_client and the user cred.
6530 */
6531 if (err == -NFS4ERR_WRONGSEC)
6532 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6533
078ea3df
TM		 6534 trace_nfs4_secinfo(dir, name, err);
6535 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6536 &exception);
6537 } while (exception.retry);
6538 return err;
6539}
6540
557134a3 6541#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6542/*
6543 * Check the exchange flags returned by the server for invalid flags, having
6544 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6545 * DS flags set.
6546 */
6547static int nfs4_check_cl_exchange_flags(u32 flags)
6548{
6549 if (flags & ~EXCHGID4_FLAG_MASK_R)
6550 goto out_inval;
6551 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6552 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6553 goto out_inval;
6554 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6555 goto out_inval;
6556 return NFS_OK;
6557out_inval:
6558 return -NFS4ERR_INVAL;
6559}
6560
78fe0f41 6561static bool
79d4e1f0
CL		 6562nfs41_same_server_scope(struct nfs41_server_scope *a,
6563 struct nfs41_server_scope *b)
78fe0f41
WAA		 6564{
6565 if (a->server_scope_sz == b->server_scope_sz &&
6566 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6567 return true;
6568
6569 return false;
6570}
6571
7c44f1ae
WAA		 6572/*
6573 * nfs4_proc_bind_conn_to_session()
6574 *
6575 * The 4.1 client currently uses the same TCP connection for the
6576 * fore and backchannel.
6577 */
2cf047c9 6578int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6579{
6580 int status;
6581 struct nfs41_bind_conn_to_session_res res;
6582 struct rpc_message msg = {
6583 .rpc_proc =
6584 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6585 .rpc_argp = clp,
6586 .rpc_resp = &res,
2cf047c9 6587 .rpc_cred = cred,
7c44f1ae
WAA		 6588 };
6589
6590 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 6591
6592 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6593 if (unlikely(res.session == NULL)) {
6594 status = -ENOMEM;
6595 goto out;
6596 }
6597
6598 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6599 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 6600 if (status == 0) {
6601 if (memcmp(res.session->sess_id.data,
6602 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6603 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6604 status = -EIO;
6605 goto out_session;
6606 }
6607 if (res.dir != NFS4_CDFS4_BOTH) {
6608 dprintk("NFS: %s: Unexpected direction from server\n",
6609 __func__);
6610 status = -EIO;
6611 goto out_session;
6612 }
6613 if (res.use_conn_in_rdma_mode) {
6614 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6615 __func__);
6616 status = -EIO;
6617 goto out_session;
6618 }
6619 }
6620out_session:
6621 kfree(res.session);
6622out:
6623 dprintk("<-- %s status= %d\n", __func__, status);
6624 return status;
6625}
6626
99fe60d0 6627/*
fa940720
WAA		 6628 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6629 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6630 */
6631static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6632 .how = SP4_MACH_CRED,
6633 .enforce.u.words = {
6634 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6635 1 << (OP_EXCHANGE_ID - 32) |
6636 1 << (OP_CREATE_SESSION - 32) |
6637 1 << (OP_DESTROY_SESSION - 32) |
6638 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6639 },
6640 .allow.u.words = {
6641 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6642 1 << (OP_LOCKU) |
6643 1 << (OP_COMMIT),
8b5bee2e 6644 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6645 1 << (OP_SECINFO_NO_NAME - 32) |
6646 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6647 1 << (OP_FREE_STATEID - 32) |
6648 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6649 }
6650};
6651
6652/*
6653 * Select the state protection mode for client `clp' given the server results
6654 * from exchange_id in `sp'.
99fe60d0 6655 *
2031cd1a
WAA		 6656 * Returns 0 on success, negative errno otherwise.
6657 */
6658static int nfs4_sp4_select_mode(struct nfs_client *clp,
6659 struct nfs41_state_protection *sp)
6660{
6661 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6662 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6663 1 << (OP_EXCHANGE_ID - 32) |
6664 1 << (OP_CREATE_SESSION - 32) |
6665 1 << (OP_DESTROY_SESSION - 32) |
6666 1 << (OP_DESTROY_CLIENTID - 32)
6667 };
6668 unsigned int i;
6669
6670 if (sp->how == SP4_MACH_CRED) {
6671 /* Print state protect result */
6672 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6673 for (i = 0; i <= LAST_NFS4_OP; i++) {
6674 if (test_bit(i, sp->enforce.u.longs))
6675 dfprintk(MOUNT, " enforce op %d\n", i);
6676 if (test_bit(i, sp->allow.u.longs))
6677 dfprintk(MOUNT, " allow op %d\n", i);
6678 }
6679
6680 /* make sure nothing is on enforce list that isn't supported */
6681 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6682 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6683 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6684 return -EINVAL;
6685 }
6686 }
6687
6688 /*
6689 * Minimal mode - state operations are allowed to use machine
6690 * credential. Note this already happens by default, so the
6691 * client doesn't have to do anything more than the negotiation.
6692 *
6693 * NOTE: we don't care if EXCHANGE_ID is in the list -
6694 * we're already using the machine cred for exchange_id
6695 * and will never use a different cred.
6696 */
6697 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6698 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6699 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6700 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6701 dfprintk(MOUNT, "sp4_mach_cred:\n");
6702 dfprintk(MOUNT, " minimal mode enabled\n");
6703 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6704 } else {
6705 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6706 return -EINVAL;
6707 }
fa940720
WAA		 6708
6709 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6710 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6711 dfprintk(MOUNT, " cleanup mode enabled\n");
6712 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6713 }
8b5bee2e
WAA		 6714
6715 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6716 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6717 dfprintk(MOUNT, " secinfo mode enabled\n");
6718 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6719 }
3787d506
WAA		 6720
6721 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6722 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6723 dfprintk(MOUNT, " stateid mode enabled\n");
6724 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6725 }
8c21c62c
WAA		 6726
6727 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6728 dfprintk(MOUNT, " write mode enabled\n");
6729 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6730 }
6731
6732 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6733 dfprintk(MOUNT, " commit mode enabled\n");
6734 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6735 }
2031cd1a
WAA		 6736 }
6737
6738 return 0;
6739}
6740
6741/*
6742 * _nfs4_proc_exchange_id()
6bbb4ae8 6743 *
2031cd1a 6744 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6745 */
2031cd1a
WAA		 6746static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6747 u32 sp4_how)
99fe60d0
BH		 6748{
6749 nfs4_verifier verifier;
6750 struct nfs41_exchange_id_args args = {
cd93710e 6751 .verifier = &verifier,
99fe60d0 6752 .client = clp,
cd3fadec 6753#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6754 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6755 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6756 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6757#else
6758 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6759 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6760#endif
99fe60d0
BH		 6761 };
6762 struct nfs41_exchange_id_res res = {
32b01310 6763 0
99fe60d0
BH		 6764 };
6765 int status;
6766 struct rpc_message msg = {
6767 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6768 .rpc_argp = &args,
6769 .rpc_resp = &res,
6770 .rpc_cred = cred,
6771 };
99fe60d0 6772
f092075d 6773 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6774 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6775 sizeof(args.id));
6bbb4ae8
CL		 6776 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6777 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6778 args.id_len, args.id);
99fe60d0 6779
acdeb69d 6780 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6781 GFP_NOFS);
acdeb69d 6782 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6783 status = -ENOMEM;
6784 goto out;
6785 }
78fe0f41 6786
79d4e1f0 6787 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6788 GFP_NOFS);
177313f1 6789 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6790 status = -ENOMEM;
acdeb69d 6791 goto out_server_owner;
abe9a6d5 6792 }
78fe0f41 6793
bbafffd2 6794 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6795 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6796 status = -ENOMEM;
6797 goto out_server_scope;
6798 }
6799
2031cd1a
WAA		 6800 switch (sp4_how) {
6801 case SP4_NONE:
6802 args.state_protect.how = SP4_NONE;
6803 break;
6804
6805 case SP4_MACH_CRED:
6806 args.state_protect = nfs4_sp4_mach_cred_request;
6807 break;
6808
6809 default:
6810 /* unsupported! */
6811 WARN_ON_ONCE(1);
6812 status = -EINVAL;
6813 goto out_server_scope;
6814 }
6815
1bd714f2 6816 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6817 trace_nfs4_exchange_id(clp, status);
177313f1 6818 if (status == 0)
32b01310 6819 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6820
2031cd1a
WAA		 6821 if (status == 0)
6822 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6823
acdeb69d 6824 if (status == 0) {
32b01310
TM		 6825 clp->cl_clientid = res.clientid;
6826 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6827 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6828 clp->cl_seqid = res.seqid;
6829
acdeb69d
CL		 6830 kfree(clp->cl_serverowner);
6831 clp->cl_serverowner = res.server_owner;
6832 res.server_owner = NULL;
78fe0f41 6833
7d2ed9ac 6834 /* use the most recent implementation id */
59155546
CL		 6835 kfree(clp->cl_implid);
6836 clp->cl_implid = res.impl_id;
7d2ed9ac 6837
177313f1 6838 if (clp->cl_serverscope != NULL &&
79d4e1f0 6839 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6840 res.server_scope)) {
6841 dprintk("%s: server_scope mismatch detected\n",
6842 __func__);
6843 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6844 kfree(clp->cl_serverscope);
6845 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6846 }
6847
177313f1 6848 if (clp->cl_serverscope == NULL) {
79d4e1f0 6849 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6850 goto out;
6851 }
32b01310
TM		 6852 } else
6853 kfree(res.impl_id);
7d2ed9ac 6854
acdeb69d
CL		 6855out_server_owner:
6856 kfree(res.server_owner);
7d2ed9ac 6857out_server_scope:
abe9a6d5
WAA		 6858 kfree(res.server_scope);
6859out:
177313f1 6860 if (clp->cl_implid != NULL)
6bbb4ae8 6861 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6862 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6863 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6864 clp->cl_implid->date.seconds,
6865 clp->cl_implid->date.nseconds);
6bbb4ae8 6866 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6867 return status;
6868}
6869
2031cd1a
WAA		 6870/*
6871 * nfs4_proc_exchange_id()
6872 *
6873 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6874 *
6875 * Since the clientid has expired, all compounds using sessions
6876 * associated with the stale clientid will be returning
6877 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6878 * be in some phase of session reset.
6879 *
6880 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6881 */
6882int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6883{
6884 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6885 int status;
6886
6887 /* try SP4_MACH_CRED if krb5i/p */
6888 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6889 authflavor == RPC_AUTH_GSS_KRB5P) {
6890 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6891 if (!status)
6892 return 0;
6893 }
6894
6895 /* try SP4_NONE */
6896 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6897}
6898
66245539
TM		 6899static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6900 struct rpc_cred *cred)
6901{
6902 struct rpc_message msg = {
6903 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6904 .rpc_argp = clp,
6905 .rpc_cred = cred,
6906 };
6907 int status;
6908
6909 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6910 trace_nfs4_destroy_clientid(clp, status);
66245539 6911 if (status)
02c67525 6912 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6913 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6914 return status;
6915}
6916
6917static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6918 struct rpc_cred *cred)
6919{
6920 unsigned int loop;
6921 int ret;
6922
6923 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6924 ret = _nfs4_proc_destroy_clientid(clp, cred);
6925 switch (ret) {
6926 case -NFS4ERR_DELAY:
6927 case -NFS4ERR_CLIENTID_BUSY:
6928 ssleep(1);
6929 break;
6930 default:
6931 return ret;
6932 }
6933 }
6934 return 0;
6935}
6936
6937int nfs4_destroy_clientid(struct nfs_client *clp)
6938{
6939 struct rpc_cred *cred;
6940 int ret = 0;
6941
6942 if (clp->cl_mvops->minor_version < 1)
6943 goto out;
6944 if (clp->cl_exchange_flags == 0)
6945 goto out;
05f4c350
CL		 6946 if (clp->cl_preserve_clid)
6947 goto out;
73d8bde5 6948 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6949 ret = nfs4_proc_destroy_clientid(clp, cred);
6950 if (cred)
6951 put_rpccred(cred);
6952 switch (ret) {
6953 case 0:
6954 case -NFS4ERR_STALE_CLIENTID:
6955 clp->cl_exchange_flags = 0;
6956 }
6957out:
6958 return ret;
6959}
6960
2050f0cc
AA		 6961struct nfs4_get_lease_time_data {
6962 struct nfs4_get_lease_time_args *args;
6963 struct nfs4_get_lease_time_res *res;
6964 struct nfs_client *clp;
6965};
6966
6967static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6968 void *calldata)
6969{
2050f0cc
AA		 6970 struct nfs4_get_lease_time_data *data =
6971 (struct nfs4_get_lease_time_data *)calldata;
6972
6973 dprintk("--> %s\n", __func__);
6974 /* just setup sequence, do not trigger session recovery
6975 since we're invoked within one */
d9afbd1b
TM		 6976 nfs41_setup_sequence(data->clp->cl_session,
6977 &data->args->la_seq_args,
6978 &data->res->lr_seq_res,
6979 task);
2050f0cc
AA		 6980 dprintk("<-- %s\n", __func__);
6981}
6982
6983/*
6984 * Called from nfs4_state_manager thread for session setup, so don't recover
6985 * from sequence operation or clientid errors.
6986 */
6987static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6988{
6989 struct nfs4_get_lease_time_data *data =
6990 (struct nfs4_get_lease_time_data *)calldata;
6991
6992 dprintk("--> %s\n", __func__);
14516c3a
TM		 6993 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6994 return;
2050f0cc
AA		 6995 switch (task->tk_status) {
6996 case -NFS4ERR_DELAY:
6997 case -NFS4ERR_GRACE:
6998 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6999 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7000 task->tk_status = 0;
a8a4ae3a
AA		 7001 /* fall through */
7002 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7003 rpc_restart_call_prepare(task);
2050f0cc
AA		 7004 return;
7005 }
2050f0cc
AA		 7006 dprintk("<-- %s\n", __func__);
7007}
7008
17280175 7009static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7010 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7011 .rpc_call_done = nfs4_get_lease_time_done,
7012};
7013
7014int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7015{
7016 struct rpc_task *task;
7017 struct nfs4_get_lease_time_args args;
7018 struct nfs4_get_lease_time_res res = {
7019 .lr_fsinfo = fsinfo,
7020 };
7021 struct nfs4_get_lease_time_data data = {
7022 .args = &args,
7023 .res = &res,
7024 .clp = clp,
7025 };
7026 struct rpc_message msg = {
7027 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7028 .rpc_argp = &args,
7029 .rpc_resp = &res,
7030 };
7031 struct rpc_task_setup task_setup = {
7032 .rpc_client = clp->cl_rpcclient,
7033 .rpc_message = &msg,
7034 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7035 .callback_data = &data,
7036 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7037 };
7038 int status;
7039
a9c92d6b 7040 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7041 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7042 dprintk("--> %s\n", __func__);
7043 task = rpc_run_task(&task_setup);
7044
7045 if (IS_ERR(task))
7046 status = PTR_ERR(task);
7047 else {
7048 status = task->tk_status;
7049 rpc_put_task(task);
7050 }
7051 dprintk("<-- %s return %d\n", __func__, status);
7052
7053 return status;
7054}
7055
fc931582
AA		 7056/*
7057 * Initialize the values to be used by the client in CREATE_SESSION
7058 * If nfs4_init_session set the fore channel request and response sizes,
7059 * use them.
7060 *
7061 * Set the back channel max_resp_sz_cached to zero to force the client to
7062 * always set csa_cachethis to FALSE because the current implementation
7063 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7064 */
7065static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7066{
18aad3d5
AA		 7067 unsigned int max_rqst_sz, max_resp_sz;
7068
7069 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7070 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7071
fc931582 7072 /* Fore channel attributes */
18aad3d5
AA		 7073 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7074 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7075 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7076 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7077
7078 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7079 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7080 __func__,
7081 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7082 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7083
7084 /* Back channel attributes */
fc931582
AA		 7085 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7086 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7087 args->bc_attrs.max_resp_sz_cached = 0;
7088 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7089 args->bc_attrs.max_reqs = 1;
7090
7091 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7092 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7093 __func__,
7094 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7095 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7096 args->bc_attrs.max_reqs);
7097}
7098
43c2e885 7099static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 7100{
43c2e885
BF		 7101 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7102 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
7103
43c2e885
BF		 7104 if (rcvd->max_resp_sz > sent->max_resp_sz)
7105 return -EINVAL;
7106 /*
7107 * Our requested max_ops is the minimum we need; we're not
7108 * prepared to break up compounds into smaller pieces than that.
7109 * So, no point even trying to continue if the server won't
7110 * cooperate:
7111 */
7112 if (rcvd->max_ops < sent->max_ops)
7113 return -EINVAL;
7114 if (rcvd->max_reqs == 0)
7115 return -EINVAL;
b4b9a0c1
VG		 7116 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7117 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7118 return 0;
8d35301d
AA		 7119}
7120
43c2e885
BF		 7121static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
7122{
7123 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7124 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 7125
43c2e885
BF		 7126 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7127 return -EINVAL;
7128 if (rcvd->max_resp_sz < sent->max_resp_sz)
7129 return -EINVAL;
7130 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7131 return -EINVAL;
7132 /* These would render the backchannel useless: */
b4b9a0c1 7133 if (rcvd->max_ops != sent->max_ops)
43c2e885 7134 return -EINVAL;
b4b9a0c1 7135 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 7136 return -EINVAL;
7137 return 0;
7138}
8d35301d 7139
8d35301d
AA		 7140static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7141 struct nfs4_session *session)
7142{
43c2e885 7143 int ret;
8d35301d 7144
43c2e885
BF		 7145 ret = nfs4_verify_fore_channel_attrs(args, session);
7146 if (ret)
7147 return ret;
7148 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 7149}
7150
848f5bda
TM		 7151static int _nfs4_proc_create_session(struct nfs_client *clp,
7152 struct rpc_cred *cred)
fc931582
AA		 7153{
7154 struct nfs4_session *session = clp->cl_session;
7155 struct nfs41_create_session_args args = {
7156 .client = clp,
7157 .cb_program = NFS4_CALLBACK,
7158 };
7159 struct nfs41_create_session_res res = {
7160 .client = clp,
7161 };
7162 struct rpc_message msg = {
7163 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7164 .rpc_argp = &args,
7165 .rpc_resp = &res,
848f5bda 7166 .rpc_cred = cred,
fc931582
AA		 7167 };
7168 int status;
7169
7170 nfs4_init_channel_attrs(&args);
0f91421e 7171 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7172
1bd714f2 7173 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7174 trace_nfs4_create_session(clp, status);
fc931582 7175
43095d39 7176 if (!status) {
8d35301d
AA		 7177 /* Verify the session's negotiated channel_attrs values */
7178 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 7179 /* Increment the clientid slot sequence id */
7180 clp->cl_seqid++;
7181 }
7182
7183 return status;
7184}
7185
7186/*
7187 * Issues a CREATE_SESSION operation to the server.
7188 * It is the responsibility of the caller to verify the session is
7189 * expired before calling this routine.
7190 */
848f5bda 7191int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7192{
7193 int status;
7194 unsigned *ptr;
fc931582
AA		 7195 struct nfs4_session *session = clp->cl_session;
7196
7197 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7198
848f5bda 7199 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7200 if (status)
7201 goto out;
7202
aacd5537
AA		 7203 /* Init or reset the session slot tables */
7204 status = nfs4_setup_session_slot_tables(session);
7205 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7206 if (status)
7207 goto out;
7208
7209 ptr = (unsigned *)&session->sess_id.data[0];
7210 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7211 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7212out:
7213 dprintk("<-- %s\n", __func__);
7214 return status;
7215}
7216
0f3e66c6
AA		 7217/*
7218 * Issue the over-the-wire RPC DESTROY_SESSION.
7219 * The caller must serialize access to this routine.
7220 */
848f5bda
TM		 7221int nfs4_proc_destroy_session(struct nfs4_session *session,
7222 struct rpc_cred *cred)
0f3e66c6 7223{
848f5bda
TM		 7224 struct rpc_message msg = {
7225 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7226 .rpc_argp = session,
7227 .rpc_cred = cred,
7228 };
0f3e66c6 7229 int status = 0;
0f3e66c6
AA		 7230
7231 dprintk("--> nfs4_proc_destroy_session\n");
7232
7233 /* session is still being setup */
7234 if (session->clp->cl_cons_state != NFS_CS_READY)
7235 return status;
7236
1bd714f2 7237 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7238 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7239
7240 if (status)
08106ac7 7241 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7242 "Session has been destroyed regardless...\n", status);
7243
7244 dprintk("<-- nfs4_proc_destroy_session\n");
7245 return status;
7246}
7247
fc01cea9
AA		 7248/*
7249 * Renew the cl_session lease.
7250 */
d5f8d3fe
TM		 7251struct nfs4_sequence_data {
7252 struct nfs_client *clp;
7253 struct nfs4_sequence_args args;
7254 struct nfs4_sequence_res res;
7255};
7256
dc96aef9
AB		 7257static void nfs41_sequence_release(void *data)
7258{
d5f8d3fe
TM		 7259 struct nfs4_sequence_data *calldata = data;
7260 struct nfs_client *clp = calldata->clp;
dc96aef9 7261
7135840f
AB		 7262 if (atomic_read(&clp->cl_count) > 1)
7263 nfs4_schedule_state_renewal(clp);
7264 nfs_put_client(clp);
d5f8d3fe 7265 kfree(calldata);
dc96aef9
AB		 7266}
7267
aa5190d0
TM		 7268static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7269{
7270 switch(task->tk_status) {
7271 case -NFS4ERR_DELAY:
aa5190d0
TM		 7272 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7273 return -EAGAIN;
7274 default:
0400a6b0 7275 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7276 }
7277 return 0;
7278}
7279
dc96aef9 7280static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7281{
d5f8d3fe
TM		 7282 struct nfs4_sequence_data *calldata = data;
7283 struct nfs_client *clp = calldata->clp;
fc01cea9 7284
14516c3a
TM		 7285 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7286 return;
fc01cea9 7287
c6d01c6f 7288 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7289 if (task->tk_status < 0) {
7290 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7291 if (atomic_read(&clp->cl_count) == 1)
7292 goto out;
fc01cea9 7293
aa5190d0
TM		 7294 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7295 rpc_restart_call_prepare(task);
fc01cea9
AA		 7296 return;
7297 }
7298 }
fc01cea9 7299 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7300out:
fc01cea9
AA		 7301 dprintk("<-- %s\n", __func__);
7302}
7303
7304static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7305{
d5f8d3fe
TM		 7306 struct nfs4_sequence_data *calldata = data;
7307 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7308 struct nfs4_sequence_args *args;
7309 struct nfs4_sequence_res *res;
7310
fc01cea9
AA		 7311 args = task->tk_msg.rpc_argp;
7312 res = task->tk_msg.rpc_resp;
7313
d9afbd1b 7314 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7315}
7316
7317static const struct rpc_call_ops nfs41_sequence_ops = {
7318 .rpc_call_done = nfs41_sequence_call_done,
7319 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7320 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7321};
7322
8fe72bac
TM		 7323static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7324 struct rpc_cred *cred,
7325 bool is_privileged)
fc01cea9 7326{
d5f8d3fe 7327 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7328 struct rpc_message msg = {
7329 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7330 .rpc_cred = cred,
7331 };
71ac6da9
TM		 7332 struct rpc_task_setup task_setup_data = {
7333 .rpc_client = clp->cl_rpcclient,
7334 .rpc_message = &msg,
8fe72bac 7335 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7336 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7337 };
fc01cea9 7338
7135840f 7339 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7340 return ERR_PTR(-EIO);
dfb4f309 7341 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7342 if (calldata == NULL) {
7135840f 7343 nfs_put_client(clp);
71ac6da9 7344 return ERR_PTR(-ENOMEM);
fc01cea9 7345 }
a9c92d6b 7346 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7347 if (is_privileged)
7348 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7349 msg.rpc_argp = &calldata->args;
7350 msg.rpc_resp = &calldata->res;
7351 calldata->clp = clp;
71ac6da9 7352 task_setup_data.callback_data = calldata;
fc01cea9 7353
71ac6da9
TM		 7354 return rpc_run_task(&task_setup_data);
7355}
7356
2f60ea6b 7357static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7358{
7359 struct rpc_task *task;
7360 int ret = 0;
7361
2f60ea6b 7362 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7363 return -EAGAIN;
8fe72bac 7364 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7365 if (IS_ERR(task))
7366 ret = PTR_ERR(task);
7367 else
bf294b41 7368 rpc_put_task_async(task);
71ac6da9
TM		 7369 dprintk("<-- %s status=%d\n", __func__, ret);
7370 return ret;
7371}
7372
7373static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7374{
7375 struct rpc_task *task;
7376 int ret;
7377
8fe72bac 7378 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7379 if (IS_ERR(task)) {
7380 ret = PTR_ERR(task);
7381 goto out;
7382 }
7383 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7384 if (!ret) {
7385 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7386
7387 if (task->tk_status == 0)
7388 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7389 ret = task->tk_status;
b4410c2f 7390 }
71ac6da9
TM		 7391 rpc_put_task(task);
7392out:
7393 dprintk("<-- %s status=%d\n", __func__, ret);
7394 return ret;
fc01cea9
AA		 7395}
7396
fce5c838
RL		 7397struct nfs4_reclaim_complete_data {
7398 struct nfs_client *clp;
7399 struct nfs41_reclaim_complete_args arg;
7400 struct nfs41_reclaim_complete_res res;
7401};
7402
7403static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7404{
7405 struct nfs4_reclaim_complete_data *calldata = data;
7406
d9afbd1b
TM		 7407 nfs41_setup_sequence(calldata->clp->cl_session,
7408 &calldata->arg.seq_args,
7409 &calldata->res.seq_res,
7410 task);
fce5c838
RL		 7411}
7412
aa5190d0
TM		 7413static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7414{
7415 switch(task->tk_status) {
7416 case 0:
7417 case -NFS4ERR_COMPLETE_ALREADY:
7418 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7419 break;
7420 case -NFS4ERR_DELAY:
aa5190d0 7421 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7422 /* fall through */
7423 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7424 return -EAGAIN;
7425 default:
0400a6b0 7426 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7427 }
7428 return 0;
7429}
7430
fce5c838
RL		 7431static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7432{
7433 struct nfs4_reclaim_complete_data *calldata = data;
7434 struct nfs_client *clp = calldata->clp;
7435 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7436
7437 dprintk("--> %s\n", __func__);
14516c3a
TM		 7438 if (!nfs41_sequence_done(task, res))
7439 return;
fce5c838 7440
c6d01c6f 7441 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7442 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7443 rpc_restart_call_prepare(task);
7444 return;
7445 }
fce5c838
RL		 7446 dprintk("<-- %s\n", __func__);
7447}
7448
7449static void nfs4_free_reclaim_complete_data(void *data)
7450{
7451 struct nfs4_reclaim_complete_data *calldata = data;
7452
7453 kfree(calldata);
7454}
7455
7456static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7457 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7458 .rpc_call_done = nfs4_reclaim_complete_done,
7459 .rpc_release = nfs4_free_reclaim_complete_data,
7460};
7461
7462/*
7463 * Issue a global reclaim complete.
7464 */
965e9c23
TM		 7465static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7466 struct rpc_cred *cred)
fce5c838
RL		 7467{
7468 struct nfs4_reclaim_complete_data *calldata;
7469 struct rpc_task *task;
7470 struct rpc_message msg = {
7471 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7472 .rpc_cred = cred,
fce5c838
RL		 7473 };
7474 struct rpc_task_setup task_setup_data = {
7475 .rpc_client = clp->cl_rpcclient,
7476 .rpc_message = &msg,
7477 .callback_ops = &nfs4_reclaim_complete_call_ops,
7478 .flags = RPC_TASK_ASYNC,
7479 };
7480 int status = -ENOMEM;
7481
7482 dprintk("--> %s\n", __func__);
8535b2be 7483 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7484 if (calldata == NULL)
7485 goto out;
7486 calldata->clp = clp;
7487 calldata->arg.one_fs = 0;
fce5c838 7488
a9c92d6b 7489 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7490 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7491 msg.rpc_argp = &calldata->arg;
7492 msg.rpc_resp = &calldata->res;
7493 task_setup_data.callback_data = calldata;
7494 task = rpc_run_task(&task_setup_data);
acf82b85 7495 if (IS_ERR(task)) {
fce5c838 7496 status = PTR_ERR(task);
acf82b85
DC		 7497 goto out;
7498 }
c34c32ea
AA		 7499 status = nfs4_wait_for_completion_rpc_task(task);
7500 if (status == 0)
7501 status = task->tk_status;
fce5c838 7502 rpc_put_task(task);
acf82b85 7503 return 0;
fce5c838
RL		 7504out:
7505 dprintk("<-- %s status=%d\n", __func__, status);
7506 return status;
7507}
b1f69b75
AA		 7508
7509static void
7510nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7511{
7512 struct nfs4_layoutget *lgp = calldata;
c31663d4 7513 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7514 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7515
7516 dprintk("--> %s\n", __func__);
c31663d4
FI		 7517 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7518 * right now covering the LAYOUTGET we are about to send.
7519 * However, that is not so catastrophic, and there seems
7520 * to be no way to prevent it completely.
7521 */
6ba7db34 7522 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7523 &lgp->res.seq_res, task))
b1f69b75 7524 return;
cf7d63f1
FI		 7525 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7526 NFS_I(lgp->args.inode)->layout,
7527 lgp->args.ctx->state)) {
7528 rpc_exit(task, NFS4_OK);
cf7d63f1 7529 }
b1f69b75
AA		 7530}
7531
7532static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7533{
7534 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7535 struct inode *inode = lgp->args.inode;
7536 struct nfs_server *server = NFS_SERVER(inode);
7537 struct pnfs_layout_hdr *lo;
7538 struct nfs4_state *state = NULL;
ed7e5423 7539 unsigned long timeo, now, giveup;
b1f69b75 7540
ed7e5423 7541 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7542
6ba7db34 7543 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7544 goto out;
b1f69b75
AA		 7545
7546 switch (task->tk_status) {
7547 case 0:
ee314c2a 7548 goto out;
ed7e5423
BH		 7549 /*
7550 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7551 * (or clients) writing to the same RAID stripe
7552 */
b1f69b75 7553 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7554 /*
7555 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7556 * existing layout before getting a new one).
7557 */
b1f69b75 7558 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7559 timeo = rpc_get_timeout(task->tk_client);
7560 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7561 now = jiffies;
7562 if (time_after(giveup, now)) {
7563 unsigned long delay;
7564
7565 /* Delay for:
7566 * - Not less then NFS4_POLL_RETRY_MIN.
7567 * - One last time a jiffie before we give up
7568 * - exponential backoff (time_now minus start_attempt)
7569 */
7570 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7571 min((giveup - now - 1),
7572 now - lgp->args.timestamp));
7573
7574 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7575 __func__, delay);
7576 rpc_delay(task, delay);
7577 task->tk_status = 0;
7578 rpc_restart_call_prepare(task);
7579 goto out; /* Do not call nfs4_async_handle_error() */
7580 }
ee314c2a
TM		 7581 break;
7582 case -NFS4ERR_EXPIRED:
7583 case -NFS4ERR_BAD_STATEID:
7584 spin_lock(&inode->i_lock);
7585 lo = NFS_I(inode)->layout;
7586 if (!lo || list_empty(&lo->plh_segs)) {
7587 spin_unlock(&inode->i_lock);
7588 /* If the open stateid was bad, then recover it. */
7589 state = lgp->args.ctx->state;
7590 } else {
7591 LIST_HEAD(head);
7592
defb8460
CH		 7593 /*
7594 * Mark the bad layout state as invalid, then retry
7595 * with the current stateid.
7596 */
ee314c2a
TM		 7597 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7598 spin_unlock(&inode->i_lock);
ee314c2a 7599 pnfs_free_lseg_list(&head);
defb8460
CH		 7600
7601 task->tk_status = 0;
7602 rpc_restart_call_prepare(task);
b1f69b75
AA		 7603 }
7604 }
8478eaa1 7605 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
ee314c2a
TM		 7606 rpc_restart_call_prepare(task);
7607out:
b1f69b75
AA		 7608 dprintk("<-- %s\n", __func__);
7609}
7610
8554116e
IK		 7611static size_t max_response_pages(struct nfs_server *server)
7612{
7613 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7614 return nfs_page_array_len(0, max_resp_sz);
7615}
7616
7617static void nfs4_free_pages(struct page **pages, size_t size)
7618{
7619 int i;
7620
7621 if (!pages)
7622 return;
7623
7624 for (i = 0; i < size; i++) {
7625 if (!pages[i])
7626 break;
7627 __free_page(pages[i]);
7628 }
7629 kfree(pages);
7630}
7631
7632static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7633{
7634 struct page **pages;
7635 int i;
7636
7637 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7638 if (!pages) {
7639 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7640 return NULL;
7641 }
7642
7643 for (i = 0; i < size; i++) {
7644 pages[i] = alloc_page(gfp_flags);
7645 if (!pages[i]) {
7646 dprintk("%s: failed to allocate page\n", __func__);
7647 nfs4_free_pages(pages, size);
7648 return NULL;
7649 }
7650 }
7651
7652 return pages;
7653}
7654
b1f69b75
AA		 7655static void nfs4_layoutget_release(void *calldata)
7656{
7657 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7658 struct inode *inode = lgp->args.inode;
7659 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7660 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7661
7662 dprintk("--> %s\n", __func__);
8554116e 7663 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7664 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7665 put_nfs_open_context(lgp->args.ctx);
7666 kfree(calldata);
7667 dprintk("<-- %s\n", __func__);
7668}
7669
7670static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7671 .rpc_call_prepare = nfs4_layoutget_prepare,
7672 .rpc_call_done = nfs4_layoutget_done,
7673 .rpc_release = nfs4_layoutget_release,
7674};
7675
a0b0a6e3
TM		 7676struct pnfs_layout_segment *
7677nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7678{
a47970ff
WAA		 7679 struct inode *inode = lgp->args.inode;
7680 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7681 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7682 struct rpc_task *task;
7683 struct rpc_message msg = {
7684 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7685 .rpc_argp = &lgp->args,
7686 .rpc_resp = &lgp->res,
6ab59344 7687 .rpc_cred = lgp->cred,
b1f69b75
AA		 7688 };
7689 struct rpc_task_setup task_setup_data = {
7690 .rpc_client = server->client,
7691 .rpc_message = &msg,
7692 .callback_ops = &nfs4_layoutget_call_ops,
7693 .callback_data = lgp,
7694 .flags = RPC_TASK_ASYNC,
7695 };
a0b0a6e3 7696 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7697 int status = 0;
7698
7699 dprintk("--> %s\n", __func__);
7700
8554116e
IK		 7701 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7702 if (!lgp->args.layout.pages) {
7703 nfs4_layoutget_release(lgp);
a0b0a6e3 7704 return ERR_PTR(-ENOMEM);
8554116e
IK		 7705 }
7706 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7707 lgp->args.timestamp = jiffies;
8554116e 7708
35124a09 7709 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7710 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7711 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 7712
7713 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7714 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7715
b1f69b75
AA		 7716 task = rpc_run_task(&task_setup_data);
7717 if (IS_ERR(task))
a0b0a6e3 7718 return ERR_CAST(task);
b1f69b75 7719 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7720 if (status == 0)
7721 status = task->tk_status;
1037e6ea
TM		 7722 trace_nfs4_layoutget(lgp->args.ctx,
7723 &lgp->args.range,
7724 &lgp->res.range,
7725 status);
085b7a45
WAA		 7726 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7727 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7728 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7729 rpc_put_task(task);
7730 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7731 if (status)
7732 return ERR_PTR(status);
7733 return lseg;
b1f69b75
AA		 7734}
7735
cbe82603
BH		 7736static void
7737nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7738{
7739 struct nfs4_layoutreturn *lrp = calldata;
7740
7741 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7742 nfs41_setup_sequence(lrp->clp->cl_session,
7743 &lrp->args.seq_args,
7744 &lrp->res.seq_res,
7745 task);
cbe82603
BH		 7746}
7747
7748static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7749{
7750 struct nfs4_layoutreturn *lrp = calldata;
7751 struct nfs_server *server;
7752
7753 dprintk("--> %s\n", __func__);
7754
6ba7db34 7755 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7756 return;
7757
7758 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7759 switch (task->tk_status) {
7760 default:
7761 task->tk_status = 0;
7762 case 0:
7763 break;
7764 case -NFS4ERR_DELAY:
8478eaa1 7765 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 7766 break;
d00c5d43 7767 rpc_restart_call_prepare(task);
cbe82603
BH		 7768 return;
7769 }
cbe82603
BH		 7770 dprintk("<-- %s\n", __func__);
7771}
7772
7773static void nfs4_layoutreturn_release(void *calldata)
7774{
7775 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7776 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7777
7778 dprintk("--> %s\n", __func__);
849b286f
TM		 7779 spin_lock(&lo->plh_inode->i_lock);
7780 if (lrp->res.lrs_present)
7781 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7782 lo->plh_block_lgets--;
7783 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7784 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 7785 kfree(calldata);
7786 dprintk("<-- %s\n", __func__);
7787}
7788
7789static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7790 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7791 .rpc_call_done = nfs4_layoutreturn_done,
7792 .rpc_release = nfs4_layoutreturn_release,
7793};
7794
7795int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7796{
7797 struct rpc_task *task;
7798 struct rpc_message msg = {
7799 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7800 .rpc_argp = &lrp->args,
7801 .rpc_resp = &lrp->res,
9556000d 7802 .rpc_cred = lrp->cred,
cbe82603
BH		 7803 };
7804 struct rpc_task_setup task_setup_data = {
1771c577 7805 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7806 .rpc_message = &msg,
7807 .callback_ops = &nfs4_layoutreturn_call_ops,
7808 .callback_data = lrp,
7809 };
7810 int status;
7811
7812 dprintk("--> %s\n", __func__);
a9c92d6b 7813 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7814 task = rpc_run_task(&task_setup_data);
7815 if (IS_ERR(task))
7816 return PTR_ERR(task);
7817 status = task->tk_status;
1037e6ea 7818 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7819 dprintk("<-- %s status=%d\n", __func__, status);
7820 rpc_put_task(task);
7821 return status;
7822}
7823
b1f69b75 7824static int
cd5875fe
TM		 7825_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7826 struct pnfs_device *pdev,
7827 struct rpc_cred *cred)
b1f69b75
AA		 7828{
7829 struct nfs4_getdeviceinfo_args args = {
7830 .pdev = pdev,
7831 };
7832 struct nfs4_getdeviceinfo_res res = {
7833 .pdev = pdev,
7834 };
7835 struct rpc_message msg = {
7836 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7837 .rpc_argp = &args,
7838 .rpc_resp = &res,
cd5875fe 7839 .rpc_cred = cred,
b1f69b75
AA		 7840 };
7841 int status;
7842
7843 dprintk("--> %s\n", __func__);
7c513058 7844 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7845 dprintk("<-- %s status=%d\n", __func__, status);
7846
7847 return status;
7848}
7849
cd5875fe
TM		 7850int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7851 struct pnfs_device *pdev,
7852 struct rpc_cred *cred)
b1f69b75
AA		 7853{
7854 struct nfs4_exception exception = { };
7855 int err;
7856
7857 do {
7858 err = nfs4_handle_exception(server,
cd5875fe 7859 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7860 &exception);
7861 } while (exception.retry);
7862 return err;
7863}
7864EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7865
863a3c6c
AA		 7866static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7867{
7868 struct nfs4_layoutcommit_data *data = calldata;
7869 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7870 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7871
d9afbd1b
TM		 7872 nfs41_setup_sequence(session,
7873 &data->args.seq_args,
7874 &data->res.seq_res,
7875 task);
863a3c6c
AA		 7876}
7877
7878static void
7879nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7880{
7881 struct nfs4_layoutcommit_data *data = calldata;
7882 struct nfs_server *server = NFS_SERVER(data->args.inode);
7883
6ba7db34 7884 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7885 return;
7886
7887 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7888 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7889 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7890 case -NFS4ERR_BADLAYOUT: /* no layout */
7891 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7892 task->tk_status = 0;
e59d27e0 7893 case 0:
e59d27e0
TM		 7894 break;
7895 default:
8478eaa1 7896 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 7897 rpc_restart_call_prepare(task);
7898 return;
7899 }
7900 }
863a3c6c
AA		 7901}
7902
7903static void nfs4_layoutcommit_release(void *calldata)
7904{
7905 struct nfs4_layoutcommit_data *data = calldata;
7906
db29c089 7907 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 7908 nfs_post_op_update_inode_force_wcc(data->args.inode,
7909 data->res.fattr);
863a3c6c
AA		 7910 put_rpccred(data->cred);
7911 kfree(data);
7912}
7913
7914static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7915 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7916 .rpc_call_done = nfs4_layoutcommit_done,
7917 .rpc_release = nfs4_layoutcommit_release,
7918};
7919
7920int
ef311537 7921nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7922{
7923 struct rpc_message msg = {
7924 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7925 .rpc_argp = &data->args,
7926 .rpc_resp = &data->res,
7927 .rpc_cred = data->cred,
7928 };
7929 struct rpc_task_setup task_setup_data = {
7930 .task = &data->task,
7931 .rpc_client = NFS_CLIENT(data->args.inode),
7932 .rpc_message = &msg,
7933 .callback_ops = &nfs4_layoutcommit_ops,
7934 .callback_data = data,
7935 .flags = RPC_TASK_ASYNC,
7936 };
7937 struct rpc_task *task;
7938 int status = 0;
7939
7940 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7941 "lbw: %llu inode %lu\n",
7942 data->task.tk_pid, sync,
7943 data->args.lastbytewritten,
7944 data->args.inode->i_ino);
7945
a9c92d6b 7946 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7947 task = rpc_run_task(&task_setup_data);
7948 if (IS_ERR(task))
7949 return PTR_ERR(task);
ef311537 7950 if (sync == false)
863a3c6c
AA		 7951 goto out;
7952 status = nfs4_wait_for_completion_rpc_task(task);
7953 if (status != 0)
7954 goto out;
7955 status = task->tk_status;
1037e6ea 7956 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7957out:
7958 dprintk("%s: status %d\n", __func__, status);
7959 rpc_put_task(task);
7960 return status;
7961}
fca78d6d 7962
97431204
AA		 7963/**
7964 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7965 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7966 */
fca78d6d
BS		 7967static int
7968_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 7969 struct nfs_fsinfo *info,
7970 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 7971{
7972 struct nfs41_secinfo_no_name_args args = {
7973 .style = SECINFO_STYLE_CURRENT_FH,
7974 };
7975 struct nfs4_secinfo_res res = {
7976 .flavors = flavors,
7977 };
7978 struct rpc_message msg = {
7979 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7980 .rpc_argp = &args,
7981 .rpc_resp = &res,
7982 };
b1b3e136 7983 struct rpc_clnt *clnt = server->client;
7cb852df 7984 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 7985 int status;
7986
7987 if (use_integrity) {
7988 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 7989 cred = nfs4_get_clid_cred(server->nfs_client);
7990 msg.rpc_cred = cred;
b1b3e136
WAA		 7991 }
7992
7993 dprintk("--> %s\n", __func__);
7994 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
7995 &res.seq_res, 0);
7996 dprintk("<-- %s status=%d\n", __func__, status);
7997
7cb852df
WAA		 7998 if (cred)
7999 put_rpccred(cred);
b1b3e136
WAA		 8000
8001 return status;
fca78d6d
BS		 8002}
8003
8004static int
8005nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8006 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8007{
8008 struct nfs4_exception exception = { };
8009 int err;
8010 do {
b1b3e136
WAA		 8011 /* first try using integrity protection */
8012 err = -NFS4ERR_WRONGSEC;
8013
8014 /* try to use integrity protection with machine cred */
8015 if (_nfs4_is_integrity_protected(server->nfs_client))
8016 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8017 flavors, true);
8018
8019 /*
8020 * if unable to use integrity protection, or SECINFO with
8021 * integrity protection returns NFS4ERR_WRONGSEC (which is
8022 * disallowed by spec, but exists in deployed servers) use
8023 * the current filesystem's rpc_client and the user cred.
8024 */
8025 if (err == -NFS4ERR_WRONGSEC)
8026 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8027 flavors, false);
8028
fca78d6d
BS		 8029 switch (err) {
8030 case 0:
8031 case -NFS4ERR_WRONGSEC:
78b19bae 8032 case -ENOTSUPP:
05e9cfb4 8033 goto out;
fca78d6d
BS		 8034 default:
8035 err = nfs4_handle_exception(server, err, &exception);
8036 }
8037 } while (exception.retry);
05e9cfb4 8038out:
fca78d6d
BS		 8039 return err;
8040}
8041
8042static int
8043nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8044 struct nfs_fsinfo *info)
8045{
8046 int err;
8047 struct page *page;
367156d9 8048 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8049 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8050 struct nfs4_secinfo4 *secinfo;
8051 int i;
fca78d6d
BS		 8052
8053 page = alloc_page(GFP_KERNEL);
8054 if (!page) {
8055 err = -ENOMEM;
8056 goto out;
8057 }
8058
8059 flavors = page_address(page);
8060 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8061
8062 /*
8063 * Fall back on "guess and check" method if
8064 * the server doesn't support SECINFO_NO_NAME
8065 */
78b19bae 8066 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8067 err = nfs4_find_root_sec(server, fhandle, info);
8068 goto out_freepage;
8069 }
8070 if (err)
8071 goto out_freepage;
8072
58a8cf12
WAA		 8073 for (i = 0; i < flavors->num_flavors; i++) {
8074 secinfo = &flavors->flavors[i];
8075
8076 switch (secinfo->flavor) {
8077 case RPC_AUTH_NULL:
8078 case RPC_AUTH_UNIX:
8079 case RPC_AUTH_GSS:
8080 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8081 &secinfo->flavor_info);
8082 break;
8083 default:
8084 flavor = RPC_AUTH_MAXFLAVOR;
8085 break;
8086 }
8087
4d4b69dd
WAA		 8088 if (!nfs_auth_info_match(&server->auth_info, flavor))
8089 flavor = RPC_AUTH_MAXFLAVOR;
8090
58a8cf12
WAA		 8091 if (flavor != RPC_AUTH_MAXFLAVOR) {
8092 err = nfs4_lookup_root_sec(server, fhandle,
8093 info, flavor);
8094 if (!err)
8095 break;
8096 }
8097 }
8098
8099 if (flavor == RPC_AUTH_MAXFLAVOR)
8100 err = -EPERM;
fca78d6d
BS		 8101
8102out_freepage:
8103 put_page(page);
8104 if (err == -EACCES)
8105 return -EPERM;
8106out:
8107 return err;
8108}
1cab0652 8109
ab7cb0df
TM		 8110static int _nfs41_test_stateid(struct nfs_server *server,
8111 nfs4_stateid *stateid,
8112 struct rpc_cred *cred)
7d974794
BS		 8113{
8114 int status;
8115 struct nfs41_test_stateid_args args = {
1cab0652 8116 .stateid = stateid,
7d974794
BS		 8117 };
8118 struct nfs41_test_stateid_res res;
8119 struct rpc_message msg = {
8120 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8121 .rpc_argp = &args,
8122 .rpc_resp = &res,
ab7cb0df 8123 .rpc_cred = cred,
7d974794 8124 };
3787d506
WAA		 8125 struct rpc_clnt *rpc_client = server->client;
8126
8127 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8128 &rpc_client, &msg);
1cab0652 8129
38527b15 8130 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8131 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8132 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8133 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8134 &args.seq_args, &res.seq_res);
38527b15
CL		 8135 if (status != NFS_OK) {
8136 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8137 return status;
38527b15
CL		 8138 }
8139 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8140 return -res.status;
7d974794
BS		 8141}
8142
38527b15
CL		 8143/**
8144 * nfs41_test_stateid - perform a TEST_STATEID operation
8145 *
8146 * @server: server / transport on which to perform the operation
8147 * @stateid: state ID to test
ab7cb0df 8148 * @cred: credential
38527b15
CL		 8149 *
8150 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8151 * Otherwise a negative NFS4ERR value is returned if the operation
8152 * failed or the state ID is not currently valid.
8153 */
ab7cb0df
TM		 8154static int nfs41_test_stateid(struct nfs_server *server,
8155 nfs4_stateid *stateid,
8156 struct rpc_cred *cred)
7d974794
BS		 8157{
8158 struct nfs4_exception exception = { };
8159 int err;
8160 do {
ab7cb0df 8161 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8162 if (err != -NFS4ERR_DELAY)
8163 break;
8164 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8165 } while (exception.retry);
8166 return err;
8167}
9aeda35f 8168
7c1d5fae
TM		 8169struct nfs_free_stateid_data {
8170 struct nfs_server *server;
8171 struct nfs41_free_stateid_args args;
9aeda35f 8172 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8173};
8174
8175static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8176{
8177 struct nfs_free_stateid_data *data = calldata;
8178 nfs41_setup_sequence(nfs4_get_session(data->server),
8179 &data->args.seq_args,
8180 &data->res.seq_res,
8181 task);
8182}
8183
8184static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8185{
8186 struct nfs_free_stateid_data *data = calldata;
8187
8188 nfs41_sequence_done(task, &data->res.seq_res);
8189
8190 switch (task->tk_status) {
8191 case -NFS4ERR_DELAY:
8478eaa1 8192 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8193 rpc_restart_call_prepare(task);
8194 }
8195}
8196
8197static void nfs41_free_stateid_release(void *calldata)
8198{
8199 kfree(calldata);
8200}
8201
17f26b12 8202static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8203 .rpc_call_prepare = nfs41_free_stateid_prepare,
8204 .rpc_call_done = nfs41_free_stateid_done,
8205 .rpc_release = nfs41_free_stateid_release,
8206};
8207
8208static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8209 nfs4_stateid *stateid,
ab7cb0df 8210 struct rpc_cred *cred,
7c1d5fae
TM		 8211 bool privileged)
8212{
9aeda35f
BS		 8213 struct rpc_message msg = {
8214 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8215 .rpc_cred = cred,
9aeda35f 8216 };
7c1d5fae
TM		 8217 struct rpc_task_setup task_setup = {
8218 .rpc_client = server->client,
8219 .rpc_message = &msg,
8220 .callback_ops = &nfs41_free_stateid_ops,
8221 .flags = RPC_TASK_ASYNC,
8222 };
8223 struct nfs_free_stateid_data *data;
9aeda35f 8224
3787d506
WAA		 8225 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8226 &task_setup.rpc_client, &msg);
8227
38527b15 8228 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8229 data = kmalloc(sizeof(*data), GFP_NOFS);
8230 if (!data)
8231 return ERR_PTR(-ENOMEM);
8232 data->server = server;
8233 nfs4_stateid_copy(&data->args.stateid, stateid);
8234
8235 task_setup.callback_data = data;
8236
8237 msg.rpc_argp = &data->args;
8238 msg.rpc_resp = &data->res;
a9c92d6b 8239 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8240 if (privileged)
8241 nfs4_set_sequence_privileged(&data->args.seq_args);
8242
8243 return rpc_run_task(&task_setup);
9aeda35f
BS		 8244}
8245
38527b15
CL		 8246/**
8247 * nfs41_free_stateid - perform a FREE_STATEID operation
8248 *
8249 * @server: server / transport on which to perform the operation
8250 * @stateid: state ID to release
ab7cb0df 8251 * @cred: credential
38527b15
CL		 8252 *
8253 * Returns NFS_OK if the server freed "stateid". Otherwise a
8254 * negative NFS4ERR value is returned.
8255 */
ab7cb0df
TM		 8256static int nfs41_free_stateid(struct nfs_server *server,
8257 nfs4_stateid *stateid,
8258 struct rpc_cred *cred)
9aeda35f 8259{
7c1d5fae
TM		 8260 struct rpc_task *task;
8261 int ret;
8262
ab7cb0df 8263 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8264 if (IS_ERR(task))
8265 return PTR_ERR(task);
8266 ret = rpc_wait_for_completion_task(task);
8267 if (!ret)
8268 ret = task->tk_status;
8269 rpc_put_task(task);
8270 return ret;
9aeda35f 8271}
36281caa 8272
f1cdae87
JL		 8273static void
8274nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8275{
8276 struct rpc_task *task;
ab7cb0df 8277 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8278
ab7cb0df 8279 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8280 nfs4_free_lock_state(server, lsp);
8281 if (IS_ERR(task))
f1cdae87 8282 return;
c8b2d0bf 8283 rpc_put_task(task);
c8b2d0bf
TM		 8284}
8285
36281caa
TM		 8286static bool nfs41_match_stateid(const nfs4_stateid *s1,
8287 const nfs4_stateid *s2)
8288{
2d2f24ad 8289 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8290 return false;
8291
2d2f24ad 8292 if (s1->seqid == s2->seqid)
36281caa 8293 return true;
2d2f24ad 8294 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8295 return true;
8296
8297 return false;
8298}
8299
557134a3
AA		 8300#endif /* CONFIG_NFS_V4_1 */
8301
36281caa
TM		 8302static bool nfs4_match_stateid(const nfs4_stateid *s1,
8303 const nfs4_stateid *s2)
8304{
f597c537 8305 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8306}
8307
8308
17280175 8309static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8310 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8311 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8312 .recover_open = nfs4_open_reclaim,
8313 .recover_lock = nfs4_lock_reclaim,
591d71cb 8314 .establish_clid = nfs4_init_clientid,
05f4c350 8315 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8316};
8317
591d71cb 8318#if defined(CONFIG_NFS_V4_1)
17280175 8319static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8320 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8321 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8322 .recover_open = nfs4_open_reclaim,
8323 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8324 .establish_clid = nfs41_init_clientid,
fce5c838 8325 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8326 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8327};
8328#endif /* CONFIG_NFS_V4_1 */
8329
17280175 8330static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8331 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8332 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8333 .recover_open = nfs4_open_expired,
8334 .recover_lock = nfs4_lock_expired,
8335 .establish_clid = nfs4_init_clientid,
8336};
8337
8338#if defined(CONFIG_NFS_V4_1)
17280175 8339static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8340 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8341 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8342 .recover_open = nfs41_open_expired,
8343 .recover_lock = nfs41_lock_expired,
4d643d1d 8344 .establish_clid = nfs41_init_clientid,
1da177e4 8345};
591d71cb 8346#endif /* CONFIG_NFS_V4_1 */
1da177e4 8347
17280175 8348static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8349 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8350 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8351 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8352};
8353
8354#if defined(CONFIG_NFS_V4_1)
17280175 8355static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8356 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8357 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8358 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8359};
8360#endif
8361
ec011fe8 8362static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8363 .get_locations = _nfs40_proc_get_locations,
44c99933 8364 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8365};
8366
8367#if defined(CONFIG_NFS_V4_1)
8368static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8369 .get_locations = _nfs41_proc_get_locations,
44c99933 8370 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8371};
8372#endif /* CONFIG_NFS_V4_1 */
8373
97dc1359
TM		 8374static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8375 .minor_version = 0,
39c6daae
TM		 8376 .init_caps = NFS_CAP_READDIRPLUS
8377 | NFS_CAP_ATOMIC_OPEN
8378 | NFS_CAP_CHANGE_ATTR
8379 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8380 .init_client = nfs40_init_client,
8381 .shutdown_client = nfs40_shutdown_client,
36281caa 8382 .match_stateid = nfs4_match_stateid,
fca78d6d 8383 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8384 .free_lock_state = nfs4_release_lockowner,
9915ea7e 8385 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8386 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8387 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8388 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8389 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8390};
8391
8392#if defined(CONFIG_NFS_V4_1)
8393static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8394 .minor_version = 1,
39c6daae
TM		 8395 .init_caps = NFS_CAP_READDIRPLUS
8396 | NFS_CAP_ATOMIC_OPEN
8397 | NFS_CAP_CHANGE_ATTR
3b66486c 8398 | NFS_CAP_POSIX_LOCK
49f9a0fa 8399 | NFS_CAP_STATEID_NFSV41
e983120e 8400 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8401 .init_client = nfs41_init_client,
8402 .shutdown_client = nfs41_shutdown_client,
36281caa 8403 .match_stateid = nfs41_match_stateid,
fca78d6d 8404 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8405 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8406 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8407 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8408 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8409 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8410 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8411};
8412#endif
8413
42c2c424
SD		 8414#if defined(CONFIG_NFS_V4_2)
8415static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8416 .minor_version = 2,
7017310a
BS		 8417 .init_caps = NFS_CAP_READDIRPLUS
8418 | NFS_CAP_ATOMIC_OPEN
8419 | NFS_CAP_CHANGE_ATTR
8420 | NFS_CAP_POSIX_LOCK
8421 | NFS_CAP_STATEID_NFSV41
e983120e
AS		 8422 | NFS_CAP_ATOMIC_OPEN_V1
8423 | NFS_CAP_SEEK,
abf79bb3
CL		 8424 .init_client = nfs41_init_client,
8425 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8426 .match_stateid = nfs41_match_stateid,
8427 .find_root_sec = nfs41_find_root_sec,
7017310a 8428 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8429 .call_sync_ops = &nfs41_call_sync_ops,
42c2c424
SD		 8430 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8431 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8432 .state_renewal_ops = &nfs41_state_renewal_ops,
8433};
8434#endif
8435
97dc1359
TM		 8436const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8437 [0] = &nfs_v4_0_minor_ops,
8438#if defined(CONFIG_NFS_V4_1)
8439 [1] = &nfs_v4_1_minor_ops,
8440#endif
42c2c424
SD		 8441#if defined(CONFIG_NFS_V4_2)
8442 [2] = &nfs_v4_2_minor_ops,
8443#endif
97dc1359
TM		 8444};
8445
17f26b12 8446static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8447 .create = nfs_create,
8448 .lookup = nfs_lookup,
8449 .atomic_open = nfs_atomic_open,
8450 .link = nfs_link,
8451 .unlink = nfs_unlink,
8452 .symlink = nfs_symlink,
8453 .mkdir = nfs_mkdir,
8454 .rmdir = nfs_rmdir,
8455 .mknod = nfs_mknod,
8456 .rename = nfs_rename,
8457 .permission = nfs_permission,
8458 .getattr = nfs_getattr,
8459 .setattr = nfs_setattr,
8460 .getxattr = generic_getxattr,
8461 .setxattr = generic_setxattr,
8462 .listxattr = generic_listxattr,
8463 .removexattr = generic_removexattr,
8464};
8465
92e1d5be 8466static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8467 .permission = nfs_permission,
8468 .getattr = nfs_getattr,
8469 .setattr = nfs_setattr,
64c2ce8b
AK		 8470 .getxattr = generic_getxattr,
8471 .setxattr = generic_setxattr,
8472 .listxattr = generic_listxattr,
8473 .removexattr = generic_removexattr,
6b3b5496
BF		 8474};
8475
509de811 8476const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8477 .version = 4, /* protocol version */
8478 .dentry_ops = &nfs4_dentry_operations,
8479 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8480 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8481 .file_ops = &nfs4_file_operations,
1da177e4 8482 .getroot = nfs4_proc_get_root,
281cad46 8483 .submount = nfs4_submount,
ff9099f2 8484 .try_mount = nfs4_try_mount,
1da177e4
LT		 8485 .getattr = nfs4_proc_getattr,
8486 .setattr = nfs4_proc_setattr,
8487 .lookup = nfs4_proc_lookup,
8488 .access = nfs4_proc_access,
8489 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8490 .create = nfs4_proc_create,
8491 .remove = nfs4_proc_remove,
8492 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8493 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8494 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8495 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8496 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8497 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8498 .link = nfs4_proc_link,
8499 .symlink = nfs4_proc_symlink,
8500 .mkdir = nfs4_proc_mkdir,
8501 .rmdir = nfs4_proc_remove,
8502 .readdir = nfs4_proc_readdir,
8503 .mknod = nfs4_proc_mknod,
8504 .statfs = nfs4_proc_statfs,
8505 .fsinfo = nfs4_proc_fsinfo,
8506 .pathconf = nfs4_proc_pathconf,
e9326dca 8507 .set_capabilities = nfs4_server_capabilities,
1da177e4 8508 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8509 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8510 .read_setup = nfs4_proc_read_setup,
ec06c096 8511 .read_done = nfs4_read_done,
1da177e4 8512 .write_setup = nfs4_proc_write_setup,
788e7a89 8513 .write_done = nfs4_write_done,
1da177e4 8514 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8515 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8516 .commit_done = nfs4_commit_done,
1da177e4 8517 .lock = nfs4_proc_lock,
e50a1c2e 8518 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8519 .close_context = nfs4_close_context,
2b484297 8520 .open_context = nfs4_atomic_open,
011e2a7f 8521 .have_delegation = nfs4_have_delegation,
57ec14c5 8522 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8523 .alloc_client = nfs4_alloc_client,
45a52a02 8524 .init_client = nfs4_init_client,
cdb7eced 8525 .free_client = nfs4_free_client,
1179acc6
BS		 8526 .create_server = nfs4_create_server,
8527 .clone_server = nfs_clone_server,
1da177e4
LT		 8528};
8529
64c2ce8b
AK		 8530static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8531 .prefix = XATTR_NAME_NFSV4_ACL,
8532 .list = nfs4_xattr_list_nfs4_acl,
8533 .get = nfs4_xattr_get_nfs4_acl,
8534 .set = nfs4_xattr_set_nfs4_acl,
8535};
8536
8537const struct xattr_handler *nfs4_xattr_handlers[] = {
8538 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8539#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8540 &nfs4_xattr_nfs4_label_handler,
8541#endif
64c2ce8b
AK		 8542 NULL
8543};
8544
1da177e4
LT		 8545/*
8546 * Local variables:
8547 * c-basic-offset: 8
8548 * End:
8549 */
Linux 6.x block layer and io_uring tree(s)