projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
NFSv4: More CLOSE/OPEN races
[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;
6e3cf241
TM		 161 case -NFS4ERR_FILE_OPEN:
162 return -EBUSY;
52567b03 163 default:
1da177e4 164 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 165 __func__, -err);
52567b03 166 break;
1da177e4 167 }
52567b03 168 return -EIO;
1da177e4
LT		 169}
170
171/*
172 * This is our standard bitmap for GETATTR requests.
173 */
1549210f 174const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 175 FATTR4_WORD0_TYPE
176 | FATTR4_WORD0_CHANGE
177 | FATTR4_WORD0_SIZE
178 | FATTR4_WORD0_FSID
179 | FATTR4_WORD0_FILEID,
180 FATTR4_WORD1_MODE
181 | FATTR4_WORD1_NUMLINKS
182 | FATTR4_WORD1_OWNER
183 | FATTR4_WORD1_OWNER_GROUP
184 | FATTR4_WORD1_RAWDEV
185 | FATTR4_WORD1_SPACE_USED
186 | FATTR4_WORD1_TIME_ACCESS
187 | FATTR4_WORD1_TIME_METADATA
aa9c2669
DQ		 188 | FATTR4_WORD1_TIME_MODIFY,
189#ifdef CONFIG_NFS_V4_SECURITY_LABEL
190 FATTR4_WORD2_SECURITY_LABEL
191#endif
1da177e4
LT		 192};
193
1549210f
TM		 194static const u32 nfs4_pnfs_open_bitmap[3] = {
195 FATTR4_WORD0_TYPE
196 | FATTR4_WORD0_CHANGE
197 | FATTR4_WORD0_SIZE
198 | FATTR4_WORD0_FSID
199 | FATTR4_WORD0_FILEID,
200 FATTR4_WORD1_MODE
201 | FATTR4_WORD1_NUMLINKS
202 | FATTR4_WORD1_OWNER
203 | FATTR4_WORD1_OWNER_GROUP
204 | FATTR4_WORD1_RAWDEV
205 | FATTR4_WORD1_SPACE_USED
206 | FATTR4_WORD1_TIME_ACCESS
207 | FATTR4_WORD1_TIME_METADATA
208 | FATTR4_WORD1_TIME_MODIFY,
209 FATTR4_WORD2_MDSTHRESHOLD
210};
211
e23008ec
AA		 212static const u32 nfs4_open_noattr_bitmap[3] = {
213 FATTR4_WORD0_TYPE
214 | FATTR4_WORD0_CHANGE
215 | FATTR4_WORD0_FILEID,
216};
217
a09df2ca 218const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 219 FATTR4_WORD0_FILES_AVAIL
220 | FATTR4_WORD0_FILES_FREE
221 | FATTR4_WORD0_FILES_TOTAL,
222 FATTR4_WORD1_SPACE_AVAIL
223 | FATTR4_WORD1_SPACE_FREE
224 | FATTR4_WORD1_SPACE_TOTAL
225};
226
a09df2ca 227const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 228 FATTR4_WORD0_MAXLINK
229 | FATTR4_WORD0_MAXNAME,
230 0
231};
232
dae100c2 233const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 234 | FATTR4_WORD0_MAXREAD
235 | FATTR4_WORD0_MAXWRITE
236 | FATTR4_WORD0_LEASE_TIME,
55b6e774 237 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 238 | FATTR4_WORD1_FS_LAYOUT_TYPES,
239 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 240};
241
a09df2ca 242const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 243 FATTR4_WORD0_TYPE
244 | FATTR4_WORD0_CHANGE
245 | FATTR4_WORD0_SIZE
246 | FATTR4_WORD0_FSID
247 | FATTR4_WORD0_FILEID
248 | FATTR4_WORD0_FS_LOCATIONS,
249 FATTR4_WORD1_MODE
250 | FATTR4_WORD1_NUMLINKS
251 | FATTR4_WORD1_OWNER
252 | FATTR4_WORD1_OWNER_GROUP
253 | FATTR4_WORD1_RAWDEV
254 | FATTR4_WORD1_SPACE_USED
255 | FATTR4_WORD1_TIME_ACCESS
256 | FATTR4_WORD1_TIME_METADATA
257 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 258 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 259};
260
bc4785cd 261static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 262 struct nfs4_readdir_arg *readdir)
263{
0dbb4c67 264 __be32 *start, *p;
1da177e4 265
1da177e4 266 if (cookie > 2) {
b7ef1956 267 readdir->cookie = cookie;
1da177e4
LT		 268 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
269 return;
270 }
271
272 readdir->cookie = 0;
273 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
274 if (cookie == 2)
275 return;
276
277 /*
278 * NFSv4 servers do not return entries for '.' and '..'
279 * Therefore, we fake these entries here. We let '.'
280 * have cookie 0 and '..' have cookie 1. Note that
281 * when talking to the server, we always send cookie 0
282 * instead of 1 or 2.
283 */
2b86ce2d 284 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 285
286 if (cookie == 0) {
287 *p++ = xdr_one; /* next */
288 *p++ = xdr_zero; /* cookie, first word */
289 *p++ = xdr_one; /* cookie, second word */
290 *p++ = xdr_one; /* entry len */
291 memcpy(p, ".\0\0\0", 4); /* entry */
292 p++;
293 *p++ = xdr_one; /* bitmap length */
294 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
295 *p++ = htonl(8); /* attribute buffer length */
4e769b93 296 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 297 }
298
299 *p++ = xdr_one; /* next */
300 *p++ = xdr_zero; /* cookie, first word */
301 *p++ = xdr_two; /* cookie, second word */
302 *p++ = xdr_two; /* entry len */
303 memcpy(p, "..\0\0", 4); /* entry */
304 p++;
305 *p++ = xdr_one; /* bitmap length */
306 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
307 *p++ = htonl(8); /* attribute buffer length */
4e769b93 308 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 309
310 readdir->pgbase = (char *)p - (char *)start;
311 readdir->count -= readdir->pgbase;
2b86ce2d 312 kunmap_atomic(start);
1da177e4
LT		 313}
314
8478eaa1
N		 315static long nfs4_update_delay(long *timeout)
316{
317 long ret;
318 if (!timeout)
319 return NFS4_POLL_RETRY_MAX;
320 if (*timeout <= 0)
321 *timeout = NFS4_POLL_RETRY_MIN;
322 if (*timeout > NFS4_POLL_RETRY_MAX)
323 *timeout = NFS4_POLL_RETRY_MAX;
324 ret = *timeout;
325 *timeout <<= 1;
326 return ret;
327}
328
65de872e
TM		 329static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
330{
331 int res = 0;
332
333 might_sleep();
334
8478eaa1
N		 335 freezable_schedule_timeout_killable_unsafe(
336 nfs4_update_delay(timeout));
65de872e
TM		 337 if (fatal_signal_pending(current))
338 res = -ERESTARTSYS;
65de872e
TM		 339 return res;
340}
341
342/* This is the error handling routine for processes that are allowed
343 * to sleep.
344 */
f4ac1674 345int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 346{
347 struct nfs_client *clp = server->nfs_client;
9e33bed5 348 struct nfs4_state *state = exception->state;
3114ea7a 349 struct inode *inode = exception->inode;
65de872e
TM		 350 int ret = errorcode;
351
352 exception->retry = 0;
353 switch(errorcode) {
354 case 0:
355 return 0;
3114ea7a 356 case -NFS4ERR_OPENMODE:
011e2a7f 357 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 358 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 359 exception->retry = 1;
360 return 0;
361 }
362 if (state == NULL)
363 break;
5d422301
TM		 364 ret = nfs4_schedule_stateid_recovery(server, state);
365 if (ret < 0)
366 break;
3114ea7a 367 goto wait_on_recovery;
a1d0b5ee 368 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 369 case -NFS4ERR_ADMIN_REVOKED:
370 case -NFS4ERR_BAD_STATEID:
9e33bed5
TM		 371 if (state == NULL)
372 break;
5d422301
TM		 373 ret = nfs4_schedule_stateid_recovery(server, state);
374 if (ret < 0)
375 break;
0400a6b0 376 goto wait_on_recovery;
0ced63d1 377 case -NFS4ERR_EXPIRED:
5d422301
TM		 378 if (state != NULL) {
379 ret = nfs4_schedule_stateid_recovery(server, state);
380 if (ret < 0)
381 break;
382 }
65de872e 383 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 384 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 385 nfs4_schedule_lease_recovery(clp);
386 goto wait_on_recovery;
519ae255
CL		 387 case -NFS4ERR_MOVED:
388 ret = nfs4_schedule_migration_recovery(server);
389 if (ret < 0)
390 break;
391 goto wait_on_recovery;
8ef2f8d4
CL		 392 case -NFS4ERR_LEASE_MOVED:
393 nfs4_schedule_lease_moved_recovery(clp);
394 goto wait_on_recovery;
03391693 395#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 396 case -NFS4ERR_BADSESSION:
397 case -NFS4ERR_BADSLOT:
398 case -NFS4ERR_BAD_HIGH_SLOT:
399 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
400 case -NFS4ERR_DEADSESSION:
401 case -NFS4ERR_SEQ_FALSE_RETRY:
402 case -NFS4ERR_SEQ_MISORDERED:
403 dprintk("%s ERROR: %d Reset session\n", __func__,
404 errorcode);
9f594791 405 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 406 goto wait_on_recovery;
03391693 407#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 408 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 409 if (exception->timeout > HZ) {
410 /* We have retried a decent amount, time to
411 * fail
412 */
413 ret = -EBUSY;
414 break;
415 }
65de872e
TM		 416 case -NFS4ERR_GRACE:
417 case -NFS4ERR_DELAY:
418 ret = nfs4_delay(server->client, &exception->timeout);
419 if (ret != 0)
420 break;
a8a4ae3a 421 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 422 case -NFS4ERR_OLD_STATEID:
423 exception->retry = 1;
b064eca2
TM		 424 break;
425 case -NFS4ERR_BADOWNER:
426 /* The following works around a Linux server bug! */
427 case -NFS4ERR_BADNAME:
428 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
429 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
430 exception->retry = 1;
431 printk(KERN_WARNING "NFS: v4 server %s "
432 "does not accept raw "
433 "uid/gids. "
434 "Reenabling the idmapper.\n",
435 server->nfs_client->cl_hostname);
436 }
65de872e
TM		 437 }
438 /* We failed to handle the error */
439 return nfs4_map_errors(ret);
0400a6b0 440wait_on_recovery:
a2c0b9e2 441 ret = nfs4_wait_clnt_recover(clp);
519ae255
CL		 442 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
443 return -EIO;
a2c0b9e2
TM		 444 if (ret == 0)
445 exception->retry = 1;
446 return ret;
65de872e
TM		 447}
448
a5250def
WAA		 449/*
450 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
451 * or 'false' otherwise.
452 */
453static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
454{
455 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
456
457 if (flavor == RPC_AUTH_GSS_KRB5I ||
458 flavor == RPC_AUTH_GSS_KRB5P)
459 return true;
460
461 return false;
462}
65de872e 463
452e9352 464static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 465{
1da177e4
LT		 466 spin_lock(&clp->cl_lock);
467 if (time_before(clp->cl_last_renewal,timestamp))
468 clp->cl_last_renewal = timestamp;
469 spin_unlock(&clp->cl_lock);
470}
471
452e9352
TM		 472static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
473{
474 do_renew_lease(server->nfs_client, timestamp);
475}
476
2a3eb2b9
CL		 477struct nfs4_call_sync_data {
478 const struct nfs_server *seq_server;
479 struct nfs4_sequence_args *seq_args;
480 struct nfs4_sequence_res *seq_res;
481};
482
a9c92d6b
CL		 483static void nfs4_init_sequence(struct nfs4_sequence_args *args,
484 struct nfs4_sequence_res *res, int cache_reply)
485{
486 args->sa_slot = NULL;
487 args->sa_cache_this = cache_reply;
488 args->sa_privileged = 0;
489
490 res->sr_slot = NULL;
491}
492
493static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
494{
495 args->sa_privileged = 1;
496}
497
3bd2384a
CL		 498static int nfs40_setup_sequence(const struct nfs_server *server,
499 struct nfs4_sequence_args *args,
500 struct nfs4_sequence_res *res,
501 struct rpc_task *task)
502{
503 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
504 struct nfs4_slot *slot;
505
506 /* slot already allocated? */
507 if (res->sr_slot != NULL)
508 goto out_start;
509
510 spin_lock(&tbl->slot_tbl_lock);
511 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
512 goto out_sleep;
513
514 slot = nfs4_alloc_slot(tbl);
515 if (IS_ERR(slot)) {
516 if (slot == ERR_PTR(-ENOMEM))
517 task->tk_timeout = HZ >> 2;
518 goto out_sleep;
519 }
520 spin_unlock(&tbl->slot_tbl_lock);
521
522 args->sa_slot = slot;
523 res->sr_slot = slot;
524
525out_start:
526 rpc_call_start(task);
527 return 0;
528
529out_sleep:
530 if (args->sa_privileged)
531 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
532 NULL, RPC_PRIORITY_PRIVILEGED);
533 else
534 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
535 spin_unlock(&tbl->slot_tbl_lock);
536 return -EAGAIN;
537}
538
539static int nfs40_sequence_done(struct rpc_task *task,
540 struct nfs4_sequence_res *res)
541{
542 struct nfs4_slot *slot = res->sr_slot;
543 struct nfs4_slot_table *tbl;
544
cab92c19 545 if (slot == NULL)
3bd2384a
CL		 546 goto out;
547
548 tbl = slot->table;
549 spin_lock(&tbl->slot_tbl_lock);
550 if (!nfs41_wake_and_assign_slot(tbl, slot))
551 nfs4_free_slot(tbl, slot);
552 spin_unlock(&tbl->slot_tbl_lock);
553
554 res->sr_slot = NULL;
555out:
556 return 1;
557}
558
cccef3b9
AA		 559#if defined(CONFIG_NFS_V4_1)
560
d185a334 561static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 562{
e3725ec0 563 struct nfs4_session *session;
13615871 564 struct nfs4_slot_table *tbl;
a13ce7c6 565 struct nfs4_slot *slot = res->sr_slot;
c10e4498 566 bool send_new_highest_used_slotid = false;
13615871 567
a13ce7c6 568 tbl = slot->table;
e3725ec0 569 session = tbl->session;
ea028ac9 570
35dc1d74 571 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 572 /* Be nice to the server: try to ensure that the last transmitted
573 * value for highest_user_slotid <= target_highest_slotid
574 */
575 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
576 send_new_highest_used_slotid = true;
577
a13ce7c6 578 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 579 send_new_highest_used_slotid = false;
580 goto out_unlock;
581 }
a13ce7c6 582 nfs4_free_slot(tbl, slot);
c10e4498
TM		 583
584 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
585 send_new_highest_used_slotid = false;
b75ad4cd 586out_unlock:
35dc1d74 587 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 588 res->sr_slot = NULL;
c10e4498
TM		 589 if (send_new_highest_used_slotid)
590 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 591}
592
f9c96fcc 593int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 594{
e3725ec0 595 struct nfs4_session *session;
a13ce7c6 596 struct nfs4_slot *slot = res->sr_slot;
14516c3a 597 struct nfs_client *clp;
ac20d163 598 bool interrupted = false;
85563073 599 int ret = 1;
b0df806c 600
a13ce7c6
TM		 601 if (slot == NULL)
602 goto out_noaction;
468f8613
BS		 603 /* don't increment the sequence number if the task wasn't sent */
604 if (!RPC_WAS_SENT(task))
b0df806c
AA		 605 goto out;
606
e3725ec0 607 session = slot->table->session;
933602e3 608
ac20d163
TM		 609 if (slot->interrupted) {
610 slot->interrupted = 0;
611 interrupted = true;
612 }
613
2f92ae34 614 trace_nfs4_sequence_done(session, res);
691daf3b 615 /* Check the SEQUENCE operation status */
14516c3a
TM		 616 switch (res->sr_status) {
617 case 0:
b0df806c 618 /* Update the slot's sequence and clientid lease timer */
933602e3 619 ++slot->seq_nr;
e3725ec0 620 clp = session->clp;
8e63b6a8 621 do_renew_lease(clp, res->sr_timestamp);
0629e370 622 /* Check sequence flags */
b4410c2f
TM		 623 if (res->sr_status_flags != 0)
624 nfs4_schedule_lease_recovery(clp);
464ee9f9 625 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 626 break;
ac20d163
TM		 627 case 1:
628 /*
629 * sr_status remains 1 if an RPC level error occurred.
630 * The server may or may not have processed the sequence
631 * operation..
632 * Mark the slot as having hosted an interrupted RPC call.
633 */
634 slot->interrupted = 1;
635 goto out;
14516c3a
TM		 636 case -NFS4ERR_DELAY:
637 /* The server detected a resend of the RPC call and
638 * returned NFS4ERR_DELAY as per Section 2.10.6.2
639 * of RFC5661.
640 */
df2fabff 641 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 642 __func__,
df2fabff 643 slot->slot_nr,
933602e3 644 slot->seq_nr);
14516c3a 645 goto out_retry;
85563073
TM		 646 case -NFS4ERR_BADSLOT:
647 /*
648 * The slot id we used was probably retired. Try again
649 * using a different slot id.
650 */
e8794440
TM		 651 goto retry_nowait;
652 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 653 /*
654 * Was the last operation on this sequence interrupted?
655 * If so, retry after bumping the sequence number.
656 */
657 if (interrupted) {
658 ++slot->seq_nr;
659 goto retry_nowait;
660 }
e8794440
TM		 661 /*
662 * Could this slot have been previously retired?
663 * If so, then the server may be expecting seq_nr = 1!
664 */
8e63b6a8
TM		 665 if (slot->seq_nr != 1) {
666 slot->seq_nr = 1;
667 goto retry_nowait;
668 }
669 break;
e8794440
TM		 670 case -NFS4ERR_SEQ_FALSE_RETRY:
671 ++slot->seq_nr;
672 goto retry_nowait;
14516c3a
TM		 673 default:
674 /* Just update the slot sequence no. */
933602e3 675 ++slot->seq_nr;
b0df806c
AA		 676 }
677out:
678 /* The session may be reset by one of the error handlers. */
679 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 680 nfs41_sequence_free_slot(res);
a13ce7c6 681out_noaction:
85563073 682 return ret;
e8794440
TM		 683retry_nowait:
684 if (rpc_restart_call_prepare(task)) {
685 task->tk_status = 0;
686 ret = 0;
687 }
688 goto out;
14516c3a 689out_retry:
d05dd4e9 690 if (!rpc_restart_call(task))
14516c3a
TM		 691 goto out;
692 rpc_delay(task, NFS4_POLL_RETRY_MAX);
693 return 0;
b0df806c 694}
f9c96fcc 695EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 696
14516c3a
TM		 697static int nfs4_sequence_done(struct rpc_task *task,
698 struct nfs4_sequence_res *res)
df896455 699{
e3725ec0 700 if (res->sr_slot == NULL)
14516c3a 701 return 1;
3bd2384a
CL		 702 if (!res->sr_slot->table->session)
703 return nfs40_sequence_done(task, res);
14516c3a 704 return nfs41_sequence_done(task, res);
df896455
TM		 705}
706
dc70d7b3 707int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 708 struct nfs4_sequence_args *args,
709 struct nfs4_sequence_res *res,
ce5039c1
AA		 710 struct rpc_task *task)
711{
fbcd4abc
AA		 712 struct nfs4_slot *slot;
713 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 714
715 dprintk("--> %s\n", __func__);
ce5039c1 716 /* slot already allocated? */
dfb4f309 717 if (res->sr_slot != NULL)
d9afbd1b 718 goto out_success;
ce5039c1 719
fbcd4abc
AA		 720 tbl = &session->fc_slot_table;
721
69d206b5
TM		 722 task->tk_timeout = 0;
723
fbcd4abc 724 spin_lock(&tbl->slot_tbl_lock);
774d5f14 725 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 726 !args->sa_privileged) {
0b1c8fc4 727 /* The state manager will wait until the slot table is empty */
0b1c8fc4 728 dprintk("%s session is draining\n", __func__);
7b939a3f 729 goto out_sleep;
689cf5c1
AB		 730 }
731
2dc03b7f 732 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 733 if (IS_ERR(slot)) {
734 /* If out of memory, try again in 1/4 second */
735 if (slot == ERR_PTR(-ENOMEM))
736 task->tk_timeout = HZ >> 2;
fbcd4abc 737 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 738 goto out_sleep;
fbcd4abc
AA		 739 }
740 spin_unlock(&tbl->slot_tbl_lock);
741
2b2fa717 742 args->sa_slot = slot;
fbcd4abc 743
e8d92382 744 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 745 slot->slot_nr, slot->seq_nr);
fbcd4abc 746
dfb4f309 747 res->sr_slot = slot;
8e63b6a8 748 res->sr_timestamp = jiffies;
2a6e26cd 749 res->sr_status_flags = 0;
fbcd4abc
AA		 750 /*
751 * sr_status is only set in decode_sequence, and so will remain
752 * set to 1 if an rpc level failure occurs.
753 */
754 res->sr_status = 1;
2f92ae34 755 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 756out_success:
757 rpc_call_start(task);
ce5039c1 758 return 0;
7b939a3f 759out_sleep:
8fe72bac
TM		 760 /* Privileged tasks are queued with top priority */
761 if (args->sa_privileged)
1e1093c7
TM		 762 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
763 NULL, RPC_PRIORITY_PRIVILEGED);
764 else
765 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 766 spin_unlock(&tbl->slot_tbl_lock);
767 return -EAGAIN;
ce5039c1 768}
dc70d7b3 769EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 770
5a580e0a
CL		 771static int nfs4_setup_sequence(const struct nfs_server *server,
772 struct nfs4_sequence_args *args,
773 struct nfs4_sequence_res *res,
774 struct rpc_task *task)
ce5039c1 775{
035168ab 776 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 777 int ret = 0;
778
3bd2384a
CL		 779 if (!session)
780 return nfs40_setup_sequence(server, args, res, task);
035168ab 781
e8d92382 782 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 783 __func__, session->clp, session, res->sr_slot ?
e8d92382 784 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 785
9d12b216 786 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 787
ce5039c1
AA		 788 dprintk("<-- %s status=%d\n", __func__, ret);
789 return ret;
790}
791
ce5039c1
AA		 792static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
793{
2a3eb2b9 794 struct nfs4_call_sync_data *data = calldata;
6ba7db34 795 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 796
035168ab
TM		 797 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
798
d9afbd1b 799 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 800}
801
69ab40c4
AA		 802static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
803{
2a3eb2b9 804 struct nfs4_call_sync_data *data = calldata;
69ab40c4 805
14516c3a 806 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 807}
808
17280175 809static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 810 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 811 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 812};
813
3bd2384a
CL		 814#else /* !CONFIG_NFS_V4_1 */
815
9915ea7e
CL		 816static int nfs4_setup_sequence(const struct nfs_server *server,
817 struct nfs4_sequence_args *args,
818 struct nfs4_sequence_res *res,
819 struct rpc_task *task)
820{
3bd2384a 821 return nfs40_setup_sequence(server, args, res, task);
9915ea7e
CL		 822}
823
824static int nfs4_sequence_done(struct rpc_task *task,
825 struct nfs4_sequence_res *res)
826{
3bd2384a 827 return nfs40_sequence_done(task, res);
9915ea7e 828}
3bd2384a
CL		 829
830#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 831
832static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
833{
834 struct nfs4_call_sync_data *data = calldata;
835 nfs4_setup_sequence(data->seq_server,
836 data->seq_args, data->seq_res, task);
837}
838
839static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
840{
841 struct nfs4_call_sync_data *data = calldata;
842 nfs4_sequence_done(task, data->seq_res);
843}
844
845static const struct rpc_call_ops nfs40_call_sync_ops = {
846 .rpc_call_prepare = nfs40_call_sync_prepare,
847 .rpc_call_done = nfs40_call_sync_done,
848};
849
7c513058
BS		 850static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
851 struct nfs_server *server,
ce5039c1
AA		 852 struct rpc_message *msg,
853 struct nfs4_sequence_args *args,
8fe72bac 854 struct nfs4_sequence_res *res)
ce5039c1
AA		 855{
856 int ret;
857 struct rpc_task *task;
9915ea7e 858 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 859 struct nfs4_call_sync_data data = {
035168ab 860 .seq_server = server,
ce5039c1
AA		 861 .seq_args = args,
862 .seq_res = res,
ce5039c1
AA		 863 };
864 struct rpc_task_setup task_setup = {
7c513058 865 .rpc_client = clnt,
ce5039c1 866 .rpc_message = msg,
9915ea7e 867 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 868 .callback_data = &data
869 };
870
ce5039c1
AA		 871 task = rpc_run_task(&task_setup);
872 if (IS_ERR(task))
873 ret = PTR_ERR(task);
874 else {
875 ret = task->tk_status;
876 rpc_put_task(task);
877 }
878 return ret;
879}
880
7c513058
BS		 881int nfs4_call_sync(struct rpc_clnt *clnt,
882 struct nfs_server *server,
e73b83f2
BS		 883 struct rpc_message *msg,
884 struct nfs4_sequence_args *args,
885 struct nfs4_sequence_res *res,
886 int cache_reply)
887{
a9c92d6b 888 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 889 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 890}
cccef3b9 891
38478b24 892static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 893{
38478b24 894 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 895
38478b24 896 spin_lock(&dir->i_lock);
359d7d1c 897 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 898 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 899 nfs_force_lookup_revalidate(dir);
a9a4a87a 900 dir->i_version = cinfo->after;
de242c0b 901 nfs_fscache_invalidate(dir);
38478b24 902 spin_unlock(&dir->i_lock);
1da177e4
LT		 903}
904
e56e0b78 905struct nfs4_opendata {
c6d00e63 906 struct kref kref;
e56e0b78
TM		 907 struct nfs_openargs o_arg;
908 struct nfs_openres o_res;
cdd4e68b
TM		 909 struct nfs_open_confirmargs c_arg;
910 struct nfs_open_confirmres c_res;
6926afd1
TM		 911 struct nfs4_string owner_name;
912 struct nfs4_string group_name;
e56e0b78 913 struct nfs_fattr f_attr;
1775fd3e 914 struct nfs4_label *f_label;
e56e0b78 915 struct dentry *dir;
82a2c1b7 916 struct dentry *dentry;
e56e0b78 917 struct nfs4_state_owner *owner;
aac00a8d 918 struct nfs4_state *state;
e56e0b78 919 struct iattr attrs;
26e976a8 920 unsigned long timestamp;
3e309914 921 unsigned int rpc_done : 1;
5bc2afc2 922 unsigned int file_created : 1;
bdeca1b7 923 unsigned int is_recover : 1;
24ac23ab
TM		 924 int rpc_status;
925 int cancelled;
e56e0b78
TM		 926};
927
49f9a0fa
TM		 928static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
929 int err, struct nfs4_exception *exception)
930{
931 if (err != -EINVAL)
932 return false;
933 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
934 return false;
935 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
936 exception->retry = 1;
937 return true;
938}
939
940static enum open_claim_type4
941nfs4_map_atomic_open_claim(struct nfs_server *server,
942 enum open_claim_type4 claim)
943{
944 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
945 return claim;
946 switch (claim) {
947 default:
948 return claim;
949 case NFS4_OPEN_CLAIM_FH:
950 return NFS4_OPEN_CLAIM_NULL;
951 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
952 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
953 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
954 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
955 }
956}
2ced46c2
TM		 957
958static void nfs4_init_opendata_res(struct nfs4_opendata *p)
959{
960 p->o_res.f_attr = &p->f_attr;
1775fd3e 961 p->o_res.f_label = p->f_label;
c1d51931
TM		 962 p->o_res.seqid = p->o_arg.seqid;
963 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 964 p->o_res.server = p->o_arg.server;
5f657530 965 p->o_res.access_request = p->o_arg.access;
2ced46c2 966 nfs_fattr_init(&p->f_attr);
6926afd1 967 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 968}
969
82a2c1b7 970static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 971 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 972 const struct iattr *attrs,
1775fd3e 973 struct nfs4_label *label,
4a1c0893 974 enum open_claim_type4 claim,
8535b2be 975 gfp_t gfp_mask)
e56e0b78 976{
82a2c1b7 977 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 978 struct inode *dir = parent->d_inode;
979 struct nfs_server *server = NFS_SERVER(dir);
980 struct nfs4_opendata *p;
981
8535b2be 982 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 983 if (p == NULL)
984 goto err;
14c43f76
DQ		 985
986 p->f_label = nfs4_label_alloc(server, gfp_mask);
987 if (IS_ERR(p->f_label))
988 goto err_free_p;
989
8535b2be 990 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 991 if (p->o_arg.seqid == NULL)
14c43f76 992 goto err_free_label;
82a2c1b7
AV		 993 nfs_sb_active(dentry->d_sb);
994 p->dentry = dget(dentry);
e56e0b78
TM		 995 p->dir = parent;
996 p->owner = sp;
997 atomic_inc(&sp->so_count);
dc0b027d
TM		 998 p->o_arg.open_flags = flags;
999 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 1000 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1001 * will return permission denied for all bits until close */
1002 if (!(flags & O_EXCL)) {
1003 /* ask server to check for all possible rights as results
1004 * are cached */
1005 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1006 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1007 }
7539bbab 1008 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1009 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1010 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1011 p->o_arg.name = &dentry->d_name;
e56e0b78 1012 p->o_arg.server = server;
aa9c2669 1013 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1014 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1015 p->o_arg.label = label;
49f9a0fa
TM		 1016 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1017 switch (p->o_arg.claim) {
4a1c0893
TM		 1018 case NFS4_OPEN_CLAIM_NULL:
1019 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1020 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1021 p->o_arg.fh = NFS_FH(dir);
1022 break;
1023 case NFS4_OPEN_CLAIM_PREVIOUS:
1024 case NFS4_OPEN_CLAIM_FH:
1025 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1026 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1027 p->o_arg.fh = NFS_FH(dentry->d_inode);
1028 }
536e43d1 1029 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1030 __u32 verf[2];
d77d76ff 1031
e56e0b78
TM		 1032 p->o_arg.u.attrs = &p->attrs;
1033 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1034
1035 verf[0] = jiffies;
1036 verf[1] = current->pid;
1037 memcpy(p->o_arg.u.verifier.data, verf,
1038 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1039 }
cdd4e68b
TM		 1040 p->c_arg.fh = &p->o_res.fh;
1041 p->c_arg.stateid = &p->o_res.stateid;
1042 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1043 nfs4_init_opendata_res(p);
c6d00e63 1044 kref_init(&p->kref);
e56e0b78 1045 return p;
14c43f76
DQ		 1046
1047err_free_label:
1048 nfs4_label_free(p->f_label);
1049err_free_p:
e56e0b78
TM		 1050 kfree(p);
1051err:
1052 dput(parent);
1053 return NULL;
1054}
1055
c6d00e63 1056static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1057{
c6d00e63
TM		 1058 struct nfs4_opendata *p = container_of(kref,
1059 struct nfs4_opendata, kref);
82a2c1b7 1060 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1061
1062 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1063 if (p->state != NULL)
1064 nfs4_put_open_state(p->state);
c6d00e63 1065 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1066
1067 nfs4_label_free(p->f_label);
1068
c6d00e63 1069 dput(p->dir);
82a2c1b7
AV		 1070 dput(p->dentry);
1071 nfs_sb_deactive(sb);
6926afd1 1072 nfs_fattr_free_names(&p->f_attr);
e911b815 1073 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1074 kfree(p);
1075}
1076
1077static void nfs4_opendata_put(struct nfs4_opendata *p)
1078{
1079 if (p != NULL)
1080 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1081}
1082
06f814a3
TM		 1083static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1084{
06f814a3
TM		 1085 int ret;
1086
06f814a3 1087 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1088 return ret;
1089}
1090
dc0b027d 1091static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1092{
1093 int ret = 0;
dc0b027d 1094
536e43d1 1095 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1096 goto out;
1097 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1098 case FMODE_READ:
88069f77
TM		 1099 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1100 && state->n_rdonly != 0;
6ee41268
TM		 1101 break;
1102 case FMODE_WRITE:
88069f77
TM		 1103 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1104 && state->n_wronly != 0;
6ee41268
TM		 1105 break;
1106 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1107 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1108 && state->n_rdwr != 0;
6ee41268 1109 }
dc0b027d 1110out:
6ee41268
TM		 1111 return ret;
1112}
1113
dc0b027d 1114static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1115{
652f89f6
TM		 1116 if (delegation == NULL)
1117 return 0;
dc0b027d 1118 if ((delegation->type & fmode) != fmode)
aac00a8d 1119 return 0;
d25be546
TM		 1120 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1121 return 0;
b7391f44 1122 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1123 return 1;
1124}
1125
dc0b027d 1126static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1127{
dc0b027d 1128 switch (fmode) {
e7616923
TM		 1129 case FMODE_WRITE:
1130 state->n_wronly++;
1131 break;
1132 case FMODE_READ:
1133 state->n_rdonly++;
1134 break;
1135 case FMODE_READ|FMODE_WRITE:
1136 state->n_rdwr++;
1137 }
dc0b027d 1138 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1139}
1140
4f14c194
TM		 1141static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1142{
1143 struct nfs_client *clp = state->owner->so_server->nfs_client;
1144 bool need_recover = false;
1145
1146 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1147 need_recover = true;
1148 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1149 need_recover = true;
1150 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1151 need_recover = true;
1152 if (need_recover)
1153 nfs4_state_mark_reclaim_nograce(clp, state);
1154}
1155
e999e80e
TM		 1156static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1157 nfs4_stateid *stateid)
1158{
1159 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1160 return true;
4f14c194
TM		 1161 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1162 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1163 return true;
4f14c194 1164 }
e999e80e
TM		 1165 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1166 return true;
1167 return false;
1168}
1169
f95549cf
TM		 1170static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1171{
1172 if (state->n_wronly)
1173 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1174 if (state->n_rdonly)
1175 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1176 if (state->n_rdwr)
1177 set_bit(NFS_O_RDWR_STATE, &state->flags);
1178}
1179
226056c5
TM		 1180static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1181 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1182{
226056c5
TM		 1183 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1184 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1185 case FMODE_WRITE:
1186 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1187 break;
1188 case FMODE_READ:
1189 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1190 break;
1191 case 0:
1192 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1193 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1194 clear_bit(NFS_OPEN_STATE, &state->flags);
1195 }
1196 if (stateid == NULL)
1197 return;
f95549cf
TM		 1198 /* Handle races with OPEN */
1199 if (!nfs4_stateid_match_other(stateid, &state->open_stateid) ||
1200 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1201 nfs_resync_open_stateid_locked(state);
226056c5 1202 return;
f95549cf 1203 }
003707c7 1204 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1205 nfs4_stateid_copy(&state->stateid, stateid);
1206 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1207}
1208
1209static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1210{
1211 write_seqlock(&state->seqlock);
1212 nfs_clear_open_stateid_locked(state, stateid, fmode);
1213 write_sequnlock(&state->seqlock);
4f14c194
TM		 1214 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1215 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1216}
1217
dc0b027d 1218static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1219{
dc0b027d 1220 switch (fmode) {
003707c7
TM		 1221 case FMODE_READ:
1222 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1223 break;
1224 case FMODE_WRITE:
1225 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1226 break;
1227 case FMODE_READ|FMODE_WRITE:
1228 set_bit(NFS_O_RDWR_STATE, &state->flags);
1229 }
e999e80e
TM		 1230 if (!nfs_need_update_open_stateid(state, stateid))
1231 return;
1232 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1233 nfs4_stateid_copy(&state->stateid, stateid);
1234 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1235}
1236
dc0b027d 1237static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1238{
8bda4e4c
TM		 1239 /*
1240 * Protect the call to nfs4_state_set_mode_locked and
1241 * serialise the stateid update
1242 */
1243 write_seqlock(&state->seqlock);
003707c7 1244 if (deleg_stateid != NULL) {
f597c537 1245 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1246 set_bit(NFS_DELEGATED_STATE, &state->flags);
1247 }
1248 if (open_stateid != NULL)
dc0b027d 1249 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1250 write_sequnlock(&state->seqlock);
1251 spin_lock(&state->owner->so_lock);
dc0b027d 1252 update_open_stateflags(state, fmode);
ec073428 1253 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1254}
1255
dc0b027d 1256static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1257{
1258 struct nfs_inode *nfsi = NFS_I(state->inode);
1259 struct nfs_delegation *deleg_cur;
1260 int ret = 0;
1261
dc0b027d 1262 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1263
1264 rcu_read_lock();
1265 deleg_cur = rcu_dereference(nfsi->delegation);
1266 if (deleg_cur == NULL)
1267 goto no_delegation;
1268
1269 spin_lock(&deleg_cur->lock);
17f26b12 1270 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1271 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1272 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1273 goto no_delegation_unlock;
1274
1275 if (delegation == NULL)
1276 delegation = &deleg_cur->stateid;
f597c537 1277 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1278 goto no_delegation_unlock;
1279
b7391f44 1280 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1281 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1282 ret = 1;
1283no_delegation_unlock:
1284 spin_unlock(&deleg_cur->lock);
1285no_delegation:
1286 rcu_read_unlock();
1287
1288 if (!ret && open_stateid != NULL) {
dc0b027d 1289 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1290 ret = 1;
1291 }
4f14c194
TM		 1292 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1293 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1294
1295 return ret;
1296}
1297
1298
dc0b027d 1299static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1300{
1301 struct nfs_delegation *delegation;
1302
1303 rcu_read_lock();
1304 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1305 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1306 rcu_read_unlock();
1307 return;
1308 }
1309 rcu_read_unlock();
57ec14c5 1310 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1311}
1312
6ee41268 1313static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1314{
1315 struct nfs4_state *state = opendata->state;
1316 struct nfs_inode *nfsi = NFS_I(state->inode);
1317 struct nfs_delegation *delegation;
f448badd 1318 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1319 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1320 nfs4_stateid stateid;
1321 int ret = -EAGAIN;
1322
aac00a8d 1323 for (;;) {
61beef75 1324 spin_lock(&state->owner->so_lock);
dc0b027d 1325 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1326 update_open_stateflags(state, fmode);
6ee41268 1327 spin_unlock(&state->owner->so_lock);
61beef75 1328 goto out_return_state;
6ee41268 1329 }
61beef75 1330 spin_unlock(&state->owner->so_lock);
34310430
TM		 1331 rcu_read_lock();
1332 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1333 if (!can_open_delegated(delegation, fmode)) {
34310430 1334 rcu_read_unlock();
aac00a8d 1335 break;
34310430 1336 }
aac00a8d 1337 /* Save the delegation */
f597c537 1338 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1339 rcu_read_unlock();
fa332941 1340 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1341 if (!opendata->is_recover) {
1342 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1343 if (ret != 0)
1344 goto out;
1345 }
aac00a8d 1346 ret = -EAGAIN;
34310430
TM		 1347
1348 /* Try to update the stateid using the delegation */
dc0b027d 1349 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1350 goto out_return_state;
aac00a8d 1351 }
aac00a8d
TM		 1352out:
1353 return ERR_PTR(ret);
1354out_return_state:
1355 atomic_inc(&state->count);
1356 return state;
1357}
1358
e23008ec
AA		 1359static void
1360nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1361{
1362 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1363 struct nfs_delegation *delegation;
1364 int delegation_flags = 0;
1365
1366 rcu_read_lock();
1367 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1368 if (delegation)
1369 delegation_flags = delegation->flags;
1370 rcu_read_unlock();
1371 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1372 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1373 "returning a delegation for "
1374 "OPEN(CLAIM_DELEGATE_CUR)\n",
1375 clp->cl_hostname);
1376 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1377 nfs_inode_set_delegation(state->inode,
1378 data->owner->so_cred,
1379 &data->o_res);
1380 else
1381 nfs_inode_reclaim_delegation(state->inode,
1382 data->owner->so_cred,
1383 &data->o_res);
1384}
1385
1386/*
1387 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1388 * and update the nfs4_state.
1389 */
1390static struct nfs4_state *
1391_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1392{
1393 struct inode *inode = data->state->inode;
1394 struct nfs4_state *state = data->state;
1395 int ret;
1396
d2bfda2e
WAA		 1397 if (!data->rpc_done) {
1398 if (data->rpc_status) {
1399 ret = data->rpc_status;
1400 goto err;
1401 }
1402 /* cached opens have already been processed */
1403 goto update;
e23008ec
AA		 1404 }
1405
e23008ec
AA		 1406 ret = nfs_refresh_inode(inode, &data->f_attr);
1407 if (ret)
1408 goto err;
1409
1410 if (data->o_res.delegation_type != 0)
1411 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1412update:
e23008ec
AA		 1413 update_open_stateid(state, &data->o_res.stateid, NULL,
1414 data->o_arg.fmode);
d49f042a 1415 atomic_inc(&state->count);
e23008ec
AA		 1416
1417 return state;
1418err:
1419 return ERR_PTR(ret);
1420
1421}
1422
1423static struct nfs4_state *
1424_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1425{
1426 struct inode *inode;
1427 struct nfs4_state *state = NULL;
1b370bc2 1428 int ret;
24ac23ab 1429
aac00a8d 1430 if (!data->rpc_done) {
6ee41268 1431 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1432 goto out;
1433 }
1434
1b370bc2 1435 ret = -EAGAIN;
24ac23ab 1436 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1437 goto err;
1775fd3e 1438 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1439 ret = PTR_ERR(inode);
03f28e3a 1440 if (IS_ERR(inode))
1b370bc2
TM		 1441 goto err;
1442 ret = -ENOMEM;
24ac23ab
TM		 1443 state = nfs4_get_open_state(inode, data->owner);
1444 if (state == NULL)
1b370bc2 1445 goto err_put_inode;
e23008ec
AA		 1446 if (data->o_res.delegation_type != 0)
1447 nfs4_opendata_check_deleg(data, state);
34310430 1448 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1449 data->o_arg.fmode);
24ac23ab 1450 iput(inode);
aac00a8d 1451out:
7aa262b5 1452 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1453 return state;
1b370bc2
TM		 1454err_put_inode:
1455 iput(inode);
1456err:
1457 return ERR_PTR(ret);
24ac23ab
TM		 1458}
1459
e23008ec
AA		 1460static struct nfs4_state *
1461nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1462{
1463 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1464 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1465 return _nfs4_opendata_to_nfs4_state(data);
1466}
1467
864472e9
TM		 1468static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1469{
1470 struct nfs_inode *nfsi = NFS_I(state->inode);
1471 struct nfs_open_context *ctx;
1472
1473 spin_lock(&state->inode->i_lock);
1474 list_for_each_entry(ctx, &nfsi->open_files, list) {
1475 if (ctx->state != state)
1476 continue;
1477 get_nfs_open_context(ctx);
1478 spin_unlock(&state->inode->i_lock);
1479 return ctx;
1480 }
1481 spin_unlock(&state->inode->i_lock);
1482 return ERR_PTR(-ENOENT);
1483}
1484
4a1c0893
TM		 1485static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1486 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1487{
1488 struct nfs4_opendata *opendata;
1489
4a1c0893 1490 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1491 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1492 if (opendata == NULL)
1493 return ERR_PTR(-ENOMEM);
1494 opendata->state = state;
1495 atomic_inc(&state->count);
1496 return opendata;
1497}
1498
dc0b027d 1499static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1500{
2ced46c2 1501 struct nfs4_state *newstate;
864472e9
TM		 1502 int ret;
1503
dc0b027d
TM		 1504 opendata->o_arg.open_flags = 0;
1505 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1506 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1507 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1508 nfs4_init_opendata_res(opendata);
b257957e 1509 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1510 if (ret != 0)
1511 return ret;
2ced46c2 1512 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1513 if (IS_ERR(newstate))
1514 return PTR_ERR(newstate);
643168c2 1515 nfs4_close_state(newstate, fmode);
2ced46c2 1516 *res = newstate;
864472e9
TM		 1517 return 0;
1518}
1519
1520static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1521{
864472e9 1522 struct nfs4_state *newstate;
864472e9
TM		 1523 int ret;
1524
4f14c194
TM		 1525 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1526 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1527 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1528 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1529 /* memory barrier prior to reading state->n_* */
2ced46c2 1530 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1531 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1532 smp_rmb();
1533 if (state->n_rdwr != 0) {
2ced46c2 1534 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1535 if (ret != 0)
1536 return ret;
2ced46c2
TM		 1537 if (newstate != state)
1538 return -ESTALE;
864472e9
TM		 1539 }
1540 if (state->n_wronly != 0) {
2ced46c2 1541 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1542 if (ret != 0)
1543 return ret;
2ced46c2
TM		 1544 if (newstate != state)
1545 return -ESTALE;
864472e9
TM		 1546 }
1547 if (state->n_rdonly != 0) {
2ced46c2 1548 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1549 if (ret != 0)
1550 return ret;
2ced46c2
TM		 1551 if (newstate != state)
1552 return -ESTALE;
864472e9 1553 }
1ac7e2fd
TM		 1554 /*
1555 * We may have performed cached opens for all three recoveries.
1556 * Check if we need to update the current stateid.
1557 */
1558 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1559 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1560 write_seqlock(&state->seqlock);
1ac7e2fd 1561 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1562 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1563 write_sequnlock(&state->seqlock);
1ac7e2fd 1564 }
864472e9
TM		 1565 return 0;
1566}
1567
1da177e4
LT		 1568/*
1569 * OPEN_RECLAIM:
1570 * reclaim state on the server after a reboot.
1da177e4 1571 */
539cd03a 1572static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1573{
1ac7e2fd 1574 struct nfs_delegation *delegation;
864472e9 1575 struct nfs4_opendata *opendata;
dc0b027d 1576 fmode_t delegation_type = 0;
1da177e4
LT		 1577 int status;
1578
4a1c0893
TM		 1579 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1580 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1581 if (IS_ERR(opendata))
1582 return PTR_ERR(opendata);
1ac7e2fd
TM		 1583 rcu_read_lock();
1584 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1585 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1586 delegation_type = delegation->type;
1ac7e2fd 1587 rcu_read_unlock();
864472e9
TM		 1588 opendata->o_arg.u.delegation_type = delegation_type;
1589 status = nfs4_open_recover(opendata, state);
c6d00e63 1590 nfs4_opendata_put(opendata);
1da177e4
LT		 1591 return status;
1592}
1593
539cd03a 1594static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1595{
1596 struct nfs_server *server = NFS_SERVER(state->inode);
1597 struct nfs4_exception exception = { };
1598 int err;
1599 do {
539cd03a 1600 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1601 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1602 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1603 continue;
168667c4 1604 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1605 break;
1606 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1607 } while (exception.retry);
1608 return err;
1609}
1610
864472e9
TM		 1611static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1612{
1613 struct nfs_open_context *ctx;
1614 int ret;
1615
1616 ctx = nfs4_state_find_open_context(state);
1617 if (IS_ERR(ctx))
91876b13 1618 return -EAGAIN;
539cd03a 1619 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1620 put_nfs_open_context(ctx);
1621 return ret;
1622}
1623
db4f2e63 1624static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1625{
be76b5b6
TM		 1626 switch (err) {
1627 default:
1628 printk(KERN_ERR "NFS: %s: unhandled error "
1629 "%d.\n", __func__, err);
1630 case 0:
1631 case -ENOENT:
1632 case -ESTALE:
1633 break;
1634 case -NFS4ERR_BADSESSION:
1635 case -NFS4ERR_BADSLOT:
1636 case -NFS4ERR_BAD_HIGH_SLOT:
1637 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1638 case -NFS4ERR_DEADSESSION:
1639 set_bit(NFS_DELEGATED_STATE, &state->flags);
1640 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1641 return -EAGAIN;
1642 case -NFS4ERR_STALE_CLIENTID:
1643 case -NFS4ERR_STALE_STATEID:
1644 set_bit(NFS_DELEGATED_STATE, &state->flags);
1645 case -NFS4ERR_EXPIRED:
1646 /* Don't recall a delegation if it was lost */
1647 nfs4_schedule_lease_recovery(server->nfs_client);
1648 return -EAGAIN;
352297b9
CL		 1649 case -NFS4ERR_MOVED:
1650 nfs4_schedule_migration_recovery(server);
1651 return -EAGAIN;
8ef2f8d4
CL		 1652 case -NFS4ERR_LEASE_MOVED:
1653 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1654 return -EAGAIN;
be76b5b6
TM		 1655 case -NFS4ERR_DELEG_REVOKED:
1656 case -NFS4ERR_ADMIN_REVOKED:
1657 case -NFS4ERR_BAD_STATEID:
db4f2e63 1658 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1659 nfs_inode_find_state_and_recover(state->inode,
1660 stateid);
1661 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1662 return -EAGAIN;
be76b5b6
TM		 1663 case -NFS4ERR_DELAY:
1664 case -NFS4ERR_GRACE:
1665 set_bit(NFS_DELEGATED_STATE, &state->flags);
1666 ssleep(1);
1667 return -EAGAIN;
db4f2e63
TM		 1668 case -ENOMEM:
1669 case -NFS4ERR_DENIED:
1670 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1671 return 0;
be76b5b6 1672 }
1da177e4
LT		 1673 return err;
1674}
1675
db4f2e63
TM		 1676int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1677{
1678 struct nfs_server *server = NFS_SERVER(state->inode);
1679 struct nfs4_opendata *opendata;
1680 int err;
1681
1682 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1683 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1684 if (IS_ERR(opendata))
1685 return PTR_ERR(opendata);
1686 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1687 err = nfs4_open_recover(opendata, state);
1688 nfs4_opendata_put(opendata);
1689 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1690}
1691
be05c860
CL		 1692static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1693{
1694 struct nfs4_opendata *data = calldata;
1695
17ead6c8
TM		 1696 nfs40_setup_sequence(data->o_arg.server, &data->c_arg.seq_args,
1697 &data->c_res.seq_res, task);
be05c860
CL		 1698}
1699
cdd4e68b
TM		 1700static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1701{
1702 struct nfs4_opendata *data = calldata;
1703
17ead6c8 1704 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1705
cdd4e68b 1706 data->rpc_status = task->tk_status;
26e976a8 1707 if (data->rpc_status == 0) {
f597c537 1708 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1709 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1710 renew_lease(data->o_res.server, data->timestamp);
3e309914 1711 data->rpc_done = 1;
26e976a8 1712 }
cdd4e68b
TM		 1713}
1714
1715static void nfs4_open_confirm_release(void *calldata)
1716{
1717 struct nfs4_opendata *data = calldata;
1718 struct nfs4_state *state = NULL;
1719
1720 /* If this request hasn't been cancelled, do nothing */
1721 if (data->cancelled == 0)
1722 goto out_free;
1723 /* In case of error, no cleanup! */
3e309914 1724 if (!data->rpc_done)
cdd4e68b 1725 goto out_free;
cdd4e68b 1726 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1727 if (!IS_ERR(state))
643168c2 1728 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1729out_free:
c6d00e63 1730 nfs4_opendata_put(data);
cdd4e68b
TM		 1731}
1732
1733static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1734 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1735 .rpc_call_done = nfs4_open_confirm_done,
1736 .rpc_release = nfs4_open_confirm_release,
1737};
1738
1739/*
1740 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1741 */
1742static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1743{
1744 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1745 struct rpc_task *task;
5138fde0
TM		 1746 struct rpc_message msg = {
1747 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1748 .rpc_argp = &data->c_arg,
1749 .rpc_resp = &data->c_res,
1750 .rpc_cred = data->owner->so_cred,
1751 };
c970aa85
TM		 1752 struct rpc_task_setup task_setup_data = {
1753 .rpc_client = server->client,
5138fde0 1754 .rpc_message = &msg,
c970aa85
TM		 1755 .callback_ops = &nfs4_open_confirm_ops,
1756 .callback_data = data,
101070ca 1757 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1758 .flags = RPC_TASK_ASYNC,
1759 };
1da177e4
LT		 1760 int status;
1761
17ead6c8 1762 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1763 kref_get(&data->kref);
3e309914
TM		 1764 data->rpc_done = 0;
1765 data->rpc_status = 0;
5138fde0 1766 data->timestamp = jiffies;
c970aa85 1767 task = rpc_run_task(&task_setup_data);
7a1218a2 1768 if (IS_ERR(task))
cdd4e68b 1769 return PTR_ERR(task);
cdd4e68b
TM		 1770 status = nfs4_wait_for_completion_rpc_task(task);
1771 if (status != 0) {
1772 data->cancelled = 1;
1773 smp_wmb();
1774 } else
1775 status = data->rpc_status;
e6b3c4db 1776 rpc_put_task(task);
1da177e4
LT		 1777 return status;
1778}
1779
24ac23ab 1780static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1781{
24ac23ab
TM		 1782 struct nfs4_opendata *data = calldata;
1783 struct nfs4_state_owner *sp = data->owner;
549b19cc 1784 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1785
24ac23ab 1786 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1787 goto out_wait;
aac00a8d
TM		 1788 /*
1789 * Check if we still need to send an OPEN call, or if we can use
1790 * a delegation instead.
1791 */
1792 if (data->state != NULL) {
1793 struct nfs_delegation *delegation;
1794
dc0b027d 1795 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1796 goto out_no_action;
aac00a8d
TM		 1797 rcu_read_lock();
1798 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1799 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1800 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1801 can_open_delegated(delegation, data->o_arg.fmode))
1802 goto unlock_no_action;
aac00a8d
TM		 1803 rcu_read_unlock();
1804 }
95b72eb0 1805 /* Update client id. */
549b19cc 1806 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1807 switch (data->o_arg.claim) {
1808 case NFS4_OPEN_CLAIM_PREVIOUS:
1809 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1810 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1811 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1812 case NFS4_OPEN_CLAIM_FH:
1813 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1814 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1815 }
26e976a8 1816 data->timestamp = jiffies;
035168ab 1817 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1818 &data->o_arg.seq_args,
2240a9e2
TM		 1819 &data->o_res.seq_res,
1820 task) != 0)
1821 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1822
1823 /* Set the create mode (note dependency on the session type) */
1824 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1825 if (data->o_arg.open_flags & O_EXCL) {
1826 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1827 if (nfs4_has_persistent_session(clp))
1828 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1829 else if (clp->cl_mvops->minor_version > 0)
1830 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1831 }
6ee41268 1832 return;
652f89f6
TM		 1833unlock_no_action:
1834 rcu_read_unlock();
6ee41268
TM		 1835out_no_action:
1836 task->tk_action = NULL;
c8da19b9 1837out_wait:
b75ad4cd 1838 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1839}
1840
24ac23ab
TM		 1841static void nfs4_open_done(struct rpc_task *task, void *calldata)
1842{
1843 struct nfs4_opendata *data = calldata;
1da177e4 1844
24ac23ab 1845 data->rpc_status = task->tk_status;
d898528c 1846
14516c3a
TM		 1847 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1848 return;
d898528c 1849
24ac23ab 1850 if (task->tk_status == 0) {
807d66d8
TM		 1851 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1852 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1853 case S_IFREG:
1854 break;
1855 case S_IFLNK:
24ac23ab 1856 data->rpc_status = -ELOOP;
6f926b5b
TM		 1857 break;
1858 case S_IFDIR:
24ac23ab 1859 data->rpc_status = -EISDIR;
6f926b5b
TM		 1860 break;
1861 default:
24ac23ab 1862 data->rpc_status = -ENOTDIR;
807d66d8 1863 }
6f926b5b 1864 }
26e976a8 1865 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1866 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1867 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1868 }
3e309914 1869 data->rpc_done = 1;
24ac23ab 1870}
6f926b5b 1871
24ac23ab
TM		 1872static void nfs4_open_release(void *calldata)
1873{
1874 struct nfs4_opendata *data = calldata;
1875 struct nfs4_state *state = NULL;
1876
1877 /* If this request hasn't been cancelled, do nothing */
1878 if (data->cancelled == 0)
1879 goto out_free;
1880 /* In case of error, no cleanup! */
3e309914 1881 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1882 goto out_free;
1883 /* In case we need an open_confirm, no cleanup! */
1884 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1885 goto out_free;
24ac23ab 1886 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1887 if (!IS_ERR(state))
643168c2 1888 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1889out_free:
c6d00e63 1890 nfs4_opendata_put(data);
24ac23ab
TM		 1891}
1892
1893static const struct rpc_call_ops nfs4_open_ops = {
1894 .rpc_call_prepare = nfs4_open_prepare,
1895 .rpc_call_done = nfs4_open_done,
1896 .rpc_release = nfs4_open_release,
1897};
1898
b257957e 1899static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1900{
1901 struct inode *dir = data->dir->d_inode;
1902 struct nfs_server *server = NFS_SERVER(dir);
1903 struct nfs_openargs *o_arg = &data->o_arg;
1904 struct nfs_openres *o_res = &data->o_res;
1905 struct rpc_task *task;
5138fde0
TM		 1906 struct rpc_message msg = {
1907 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1908 .rpc_argp = o_arg,
1909 .rpc_resp = o_res,
1910 .rpc_cred = data->owner->so_cred,
1911 };
c970aa85
TM		 1912 struct rpc_task_setup task_setup_data = {
1913 .rpc_client = server->client,
5138fde0 1914 .rpc_message = &msg,
c970aa85
TM		 1915 .callback_ops = &nfs4_open_ops,
1916 .callback_data = data,
101070ca 1917 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1918 .flags = RPC_TASK_ASYNC,
1919 };
24ac23ab
TM		 1920 int status;
1921
a9c92d6b 1922 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1923 kref_get(&data->kref);
3e309914
TM		 1924 data->rpc_done = 0;
1925 data->rpc_status = 0;
2ced46c2 1926 data->cancelled = 0;
bdeca1b7
TM		 1927 data->is_recover = 0;
1928 if (isrecover) {
8fe72bac 1929 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1930 data->is_recover = 1;
1931 }
c970aa85 1932 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1933 if (IS_ERR(task))
1934 return PTR_ERR(task);
1935 status = nfs4_wait_for_completion_rpc_task(task);
1936 if (status != 0) {
1937 data->cancelled = 1;
1938 smp_wmb();
1939 } else
1940 status = data->rpc_status;
1941 rpc_put_task(task);
1942
1943 return status;
1944}
1945
1946static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1947{
1948 struct inode *dir = data->dir->d_inode;
1949 struct nfs_openres *o_res = &data->o_res;
1950 int status;
1951
1952 status = nfs4_run_open_task(data, 1);
1953 if (status != 0 || !data->rpc_done)
1954 return status;
1955
6926afd1
TM		 1956 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1957
b257957e
AB		 1958 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1959 status = _nfs4_proc_open_confirm(data);
1960 if (status != 0)
1961 return status;
1962 }
1963
1964 return status;
1965}
1966
f3792d63
TM		 1967/*
1968 * Additional permission checks in order to distinguish between an
1969 * open for read, and an open for execute. This works around the
1970 * fact that NFSv4 OPEN treats read and execute permissions as being
1971 * the same.
1972 * Note that in the non-execute case, we want to turn off permission
1973 * checking if we just created a new file (POSIX open() semantics).
1974 */
6168f62c
WAA		 1975static int nfs4_opendata_access(struct rpc_cred *cred,
1976 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1977 struct nfs4_state *state, fmode_t fmode,
1978 int openflags)
6168f62c
WAA		 1979{
1980 struct nfs_access_entry cache;
1981 u32 mask;
1982
1983 /* access call failed or for some reason the server doesn't
1984 * support any access modes -- defer access call until later */
1985 if (opendata->o_res.access_supported == 0)
1986 return 0;
1987
1988 mask = 0;
f3792d63
TM		 1989 /*
1990 * Use openflags to check for exec, because fmode won't
1991 * always have FMODE_EXEC set when file open for exec.
1992 */
f8d9a897
WAA		 1993 if (openflags & __FMODE_EXEC) {
1994 /* ONLY check for exec rights */
1995 mask = MAY_EXEC;
f3792d63 1996 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 1997 mask = MAY_READ;
6168f62c
WAA		 1998
1999 cache.cred = cred;
2000 cache.jiffies = jiffies;
2001 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2002 nfs_access_add_cache(state->inode, &cache);
2003
bbd3a8ee 2004 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2005 return 0;
2006
2007 /* even though OPEN succeeded, access is denied. Close the file */
2008 nfs4_close_state(state, fmode);
998f40b5 2009 return -EACCES;
6168f62c
WAA		 2010}
2011
b257957e
AB		 2012/*
2013 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2014 */
2015static int _nfs4_proc_open(struct nfs4_opendata *data)
2016{
2017 struct inode *dir = data->dir->d_inode;
2018 struct nfs_server *server = NFS_SERVER(dir);
2019 struct nfs_openargs *o_arg = &data->o_arg;
2020 struct nfs_openres *o_res = &data->o_res;
2021 int status;
2022
2023 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2024 if (!data->rpc_done)
2025 return status;
2026 if (status != 0) {
2027 if (status == -NFS4ERR_BADNAME &&
2028 !(o_arg->open_flags & O_CREAT))
2029 return -ENOENT;
24ac23ab 2030 return status;
08ef7bd3 2031 }
24ac23ab 2032
6926afd1
TM		 2033 nfs_fattr_map_and_free_names(server, &data->f_attr);
2034
5bc2afc2 2035 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2036 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2037 if (o_arg->open_flags & O_EXCL)
2038 data->file_created = 1;
2039 else if (o_res->cinfo.before != o_res->cinfo.after)
2040 data->file_created = 1;
2041 }
0df5dd4a
TM		 2042 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2043 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2044 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2045 status = _nfs4_proc_open_confirm(data);
1da177e4 2046 if (status != 0)
24ac23ab 2047 return status;
1da177e4
LT		 2048 }
2049 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2050 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2051 return 0;
1da177e4
LT		 2052}
2053
d83217c1
AA		 2054static int nfs4_recover_expired_lease(struct nfs_server *server)
2055{
2056 return nfs4_client_recover_expired_lease(server->nfs_client);
2057}
2058
1da177e4
LT		 2059/*
2060 * OPEN_EXPIRED:
2061 * reclaim state on the server after a network partition.
2062 * Assumes caller holds the appropriate lock
2063 */
539cd03a 2064static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2065{
e56e0b78 2066 struct nfs4_opendata *opendata;
864472e9 2067 int ret;
1da177e4 2068
4a1c0893 2069 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2070 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2071 if (IS_ERR(opendata))
2072 return PTR_ERR(opendata);
864472e9 2073 ret = nfs4_open_recover(opendata, state);
35d05778 2074 if (ret == -ESTALE)
3d4ff43d 2075 d_drop(ctx->dentry);
c6d00e63 2076 nfs4_opendata_put(opendata);
864472e9 2077 return ret;
1da177e4
LT		 2078}
2079
a9ed2e25 2080static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2081{
539cd03a 2082 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2083 struct nfs4_exception exception = { };
2084 int err;
2085
2086 do {
539cd03a 2087 err = _nfs4_open_expired(ctx, state);
42113a75 2088 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2089 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2090 continue;
a9ed2e25
TM		 2091 switch (err) {
2092 default:
2093 goto out;
2094 case -NFS4ERR_GRACE:
2095 case -NFS4ERR_DELAY:
2096 nfs4_handle_exception(server, err, &exception);
2097 err = 0;
2098 }
202b50dc 2099 } while (exception.retry);
a9ed2e25 2100out:
202b50dc
TM		 2101 return err;
2102}
2103
1da177e4
LT		 2104static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2105{
1da177e4 2106 struct nfs_open_context *ctx;
864472e9 2107 int ret;
1da177e4 2108
864472e9
TM		 2109 ctx = nfs4_state_find_open_context(state);
2110 if (IS_ERR(ctx))
91876b13 2111 return -EAGAIN;
539cd03a 2112 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2113 put_nfs_open_context(ctx);
2114 return ret;
1da177e4
LT		 2115}
2116
4dfd4f7a
TM		 2117static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2118{
2119 nfs_remove_bad_delegation(state->inode);
2120 write_seqlock(&state->seqlock);
2121 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2122 write_sequnlock(&state->seqlock);
2123 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2124}
2125
2126static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2127{
2128 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2129 nfs_finish_clear_delegation_stateid(state);
2130}
2131
2132static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2133{
2134 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2135 nfs40_clear_delegation_stateid(state);
2136 return nfs4_open_expired(sp, state);
2137}
2138
f062eb6c 2139#if defined(CONFIG_NFS_V4_1)
0c116cad 2140static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2141{
f062eb6c 2142 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2143 nfs4_stateid stateid;
ab7cb0df 2144 struct nfs_delegation *delegation;
0c116cad
TM		 2145 struct rpc_cred *cred;
2146 int status;
3e60ffdd 2147
ab7cb0df
TM		 2148 /* Get the delegation credential for use by test/free_stateid */
2149 rcu_read_lock();
2150 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2151 if (delegation == NULL) {
ab7cb0df 2152 rcu_read_unlock();
0c116cad
TM		 2153 return;
2154 }
2155
2156 nfs4_stateid_copy(&stateid, &delegation->stateid);
2157 cred = get_rpccred(delegation->cred);
2158 rcu_read_unlock();
2159 status = nfs41_test_stateid(server, &stateid, cred);
2160 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2161
3e60ffdd
CL		 2162 if (status != NFS_OK) {
2163 /* Free the stateid unless the server explicitly
2164 * informs us the stateid is unrecognized. */
2165 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2166 nfs41_free_stateid(server, &stateid, cred);
2167 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2168 }
ab7cb0df 2169
0c116cad 2170 put_rpccred(cred);
3e60ffdd
CL		 2171}
2172
2173/**
2174 * nfs41_check_open_stateid - possibly free an open stateid
2175 *
2176 * @state: NFSv4 state for an inode
2177 *
2178 * Returns NFS_OK if recovery for this stateid is now finished.
2179 * Otherwise a negative NFS4ERR value is returned.
2180 */
2181static int nfs41_check_open_stateid(struct nfs4_state *state)
2182{
2183 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2184 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2185 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2186 int status;
2187
2188 /* If a state reset has been done, test_stateid is unneeded */
2189 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2190 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2191 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2192 return -NFS4ERR_BAD_STATEID;
2193
ab7cb0df 2194 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2195 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2196 if (status != NFS_OK) {
2197 /* Free the stateid unless the server explicitly
2198 * informs us the stateid is unrecognized. */
2199 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2200 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2201
2202 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2203 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2204 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2205 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2206 }
2207 return status;
2208}
2209
2210static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2211{
eb64cf96 2212 int status;
b01dd1d8 2213
0c116cad 2214 nfs41_check_delegation_stateid(state);
3e60ffdd 2215 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2216 if (status != NFS_OK)
2217 status = nfs4_open_expired(sp, state);
2218 return status;
f062eb6c
BS		 2219}
2220#endif
2221
aa53ed54
JL		 2222/*
2223 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2224 * fields corresponding to attributes that were used to store the verifier.
2225 * Make sure we clobber those fields in the later setattr call
2226 */
2227static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2228{
2229 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2230 !(sattr->ia_valid & ATTR_ATIME_SET))
2231 sattr->ia_valid |= ATTR_ATIME;
2232
2233 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2234 !(sattr->ia_valid & ATTR_MTIME_SET))
2235 sattr->ia_valid |= ATTR_MTIME;
2236}
2237
c21443c2
TM		 2238static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2239 fmode_t fmode,
2240 int flags,
3efb9722 2241 struct nfs_open_context *ctx)
c21443c2
TM		 2242{
2243 struct nfs4_state_owner *sp = opendata->owner;
2244 struct nfs_server *server = sp->so_server;
275bb307 2245 struct dentry *dentry;
c21443c2
TM		 2246 struct nfs4_state *state;
2247 unsigned int seq;
2248 int ret;
2249
2250 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2251
2252 ret = _nfs4_proc_open(opendata);
dca78001 2253 if (ret != 0)
c21443c2
TM		 2254 goto out;
2255
2256 state = nfs4_opendata_to_nfs4_state(opendata);
2257 ret = PTR_ERR(state);
2258 if (IS_ERR(state))
2259 goto out;
2260 if (server->caps & NFS_CAP_POSIX_LOCK)
2261 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2262
275bb307
TM		 2263 dentry = opendata->dentry;
2264 if (dentry->d_inode == NULL) {
2265 /* FIXME: Is this d_drop() ever needed? */
2266 d_drop(dentry);
2267 dentry = d_add_unique(dentry, igrab(state->inode));
2268 if (dentry == NULL) {
2269 dentry = opendata->dentry;
2270 } else if (dentry != ctx->dentry) {
2271 dput(ctx->dentry);
2272 ctx->dentry = dget(dentry);
2273 }
2274 nfs_set_verifier(dentry,
2275 nfs_save_change_attribute(opendata->dir->d_inode));
2276 }
2277
c21443c2
TM		 2278 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2279 if (ret != 0)
2280 goto out;
2281
3efb9722 2282 ctx->state = state;
c45ffdd2
TM		 2283 if (dentry->d_inode == state->inode) {
2284 nfs_inode_attach_open_context(ctx);
2285 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2286 nfs4_schedule_stateid_recovery(server, state);
2287 }
c21443c2
TM		 2288out:
2289 return ret;
2290}
2291
1da177e4 2292/*
24ac23ab 2293 * Returns a referenced nfs4_state
1da177e4 2294 */
82be417a 2295static int _nfs4_do_open(struct inode *dir,
4197a055 2296 struct nfs_open_context *ctx,
82be417a
AA		 2297 int flags,
2298 struct iattr *sattr,
5bc2afc2
TM		 2299 struct nfs4_label *label,
2300 int *opened)
1da177e4
LT		 2301{
2302 struct nfs4_state_owner *sp;
2303 struct nfs4_state *state = NULL;
2304 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2305 struct nfs4_opendata *opendata;
4197a055
TM		 2306 struct dentry *dentry = ctx->dentry;
2307 struct rpc_cred *cred = ctx->cred;
2308 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2309 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2310 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2311 struct nfs4_label *olabel = NULL;
aac00a8d 2312 int status;
1da177e4
LT		 2313
2314 /* Protect against reboot recovery conflicts */
1da177e4 2315 status = -ENOMEM;
d1e284d5
TM		 2316 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2317 if (sp == NULL) {
1da177e4
LT		 2318 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2319 goto out_err;
2320 }
58d9714a
TM		 2321 status = nfs4_recover_expired_lease(server);
2322 if (status != 0)
b4454fe1 2323 goto err_put_state_owner;
82a2c1b7
AV		 2324 if (dentry->d_inode != NULL)
2325 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2326 status = -ENOMEM;
49f9a0fa
TM		 2327 if (dentry->d_inode)
2328 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2329 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2330 label, claim, GFP_KERNEL);
e56e0b78 2331 if (opendata == NULL)
95d35cb4 2332 goto err_put_state_owner;
1da177e4 2333
14c43f76
DQ		 2334 if (label) {
2335 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2336 if (IS_ERR(olabel)) {
2337 status = PTR_ERR(olabel);
2338 goto err_opendata_put;
2339 }
2340 }
2341
e911b815
TM		 2342 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2343 if (!opendata->f_attr.mdsthreshold) {
2344 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2345 if (!opendata->f_attr.mdsthreshold)
2346 goto err_free_label;
2347 }
1549210f 2348 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2349 }
82a2c1b7
AV		 2350 if (dentry->d_inode != NULL)
2351 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2352
3efb9722 2353 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2354 if (status != 0)
14c43f76 2355 goto err_free_label;
3efb9722 2356 state = ctx->state;
6168f62c 2357
549b19cc
TM		 2358 if ((opendata->o_arg.open_flags & O_EXCL) &&
2359 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2360 nfs4_exclusive_attrset(opendata, sattr);
2361
2362 nfs_fattr_init(opendata->o_res.f_attr);
2363 status = nfs4_do_setattr(state->inode, cred,
2364 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2365 state, label, olabel);
2366 if (status == 0) {
0ab64e0e 2367 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2368 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2369 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2370 }
0ab64e0e 2371 }
5bc2afc2
TM		 2372 if (opendata->file_created)
2373 *opened |= FILE_CREATED;
82be417a 2374
e911b815 2375 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2376 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2377 opendata->f_attr.mdsthreshold = NULL;
2378 }
82be417a 2379
14c43f76
DQ		 2380 nfs4_label_free(olabel);
2381
c6d00e63 2382 nfs4_opendata_put(opendata);
1da177e4 2383 nfs4_put_state_owner(sp);
1da177e4 2384 return 0;
14c43f76
DQ		 2385err_free_label:
2386 nfs4_label_free(olabel);
c6d00e63
TM		 2387err_opendata_put:
2388 nfs4_opendata_put(opendata);
e56e0b78
TM		 2389err_put_state_owner:
2390 nfs4_put_state_owner(sp);
1da177e4 2391out_err:
1da177e4
LT		 2392 return status;
2393}
2394
2395
82be417a 2396static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2397 struct nfs_open_context *ctx,
82be417a
AA		 2398 int flags,
2399 struct iattr *sattr,
5bc2afc2
TM		 2400 struct nfs4_label *label,
2401 int *opened)
1da177e4 2402{
49f9a0fa 2403 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2404 struct nfs4_exception exception = { };
2405 struct nfs4_state *res;
2406 int status;
2407
2408 do {
5bc2afc2 2409 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2410 res = ctx->state;
42113a75 2411 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2412 if (status == 0)
2413 break;
2414 /* NOTE: BAD_SEQID means the server and client disagree about the
2415 * book-keeping w.r.t. state-changing operations
2416 * (OPEN/CLOSE/LOCK/LOCKU...)
2417 * It is actually a sign of a bug on the client or on the server.
2418 *
2419 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2420 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2421 * have unhashed the old state_owner for us, and that we can
2422 * therefore safely retry using a new one. We should still warn
2423 * the user though...
2424 */
2425 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2426 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2427 " returned a bad sequence-id error!\n",
2428 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2429 exception.retry = 1;
2430 continue;
2431 }
550f5747
TM		 2432 /*
2433 * BAD_STATEID on OPEN means that the server cancelled our
2434 * state before it received the OPEN_CONFIRM.
2435 * Recover by retrying the request as per the discussion
2436 * on Page 181 of RFC3530.
2437 */
2438 if (status == -NFS4ERR_BAD_STATEID) {
2439 exception.retry = 1;
2440 continue;
2441 }
aac00a8d
TM		 2442 if (status == -EAGAIN) {
2443 /* We must have found a delegation */
2444 exception.retry = 1;
2445 continue;
2446 }
49f9a0fa
TM		 2447 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2448 continue;
2449 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2450 status, &exception));
2451 } while (exception.retry);
2452 return res;
2453}
2454
659bfcd6
TM		 2455static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2456 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2457 struct nfs4_state *state, struct nfs4_label *ilabel,
2458 struct nfs4_label *olabel)
1da177e4 2459{
3e4f6290 2460 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2461 struct nfs_setattrargs arg = {
3e4f6290 2462 .fh = NFS_FH(inode),
1da177e4
LT		 2463 .iap = sattr,
2464 .server = server,
2465 .bitmask = server->attr_bitmask,
1775fd3e 2466 .label = ilabel,
1da177e4
LT		 2467 };
2468 struct nfs_setattrres res = {
2469 .fattr = fattr,
1775fd3e 2470 .label = olabel,
1da177e4
LT		 2471 .server = server,
2472 };
2473 struct rpc_message msg = {
659bfcd6
TM		 2474 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2475 .rpc_argp = &arg,
2476 .rpc_resp = &res,
2477 .rpc_cred = cred,
1da177e4 2478 };
26e976a8 2479 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2480 fmode_t fmode;
2481 bool truncate;
65e4308d 2482 int status;
1da177e4 2483
aa9c2669
DQ		 2484 arg.bitmask = nfs4_bitmask(server, ilabel);
2485 if (ilabel)
2486 arg.bitmask = nfs4_bitmask(server, olabel);
2487
0e574af1 2488 nfs_fattr_init(fattr);
1da177e4 2489
ee3ae84e
TM		 2490 /* Servers should only apply open mode checks for file size changes */
2491 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2492 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2493
2494 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2495 /* Use that stateid */
0418dae1 2496 } else if (truncate && state != NULL) {
2a369153
TM		 2497 struct nfs_lockowner lockowner = {
2498 .l_owner = current->files,
2499 .l_pid = current->tgid,
2500 };
0418dae1
TM		 2501 if (!nfs4_valid_open_stateid(state))
2502 return -EBADF;
2503 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2504 &lockowner) == -EIO)
2505 return -EBADF;
08e9eac4 2506 } else
f597c537 2507 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2508
7c513058 2509 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2510 if (status == 0 && state != NULL)
2511 renew_lease(server, timestamp);
65e4308d 2512 return status;
1da177e4
LT		 2513}
2514
659bfcd6
TM		 2515static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2516 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2517 struct nfs4_state *state, struct nfs4_label *ilabel,
2518 struct nfs4_label *olabel)
1da177e4 2519{
3e4f6290 2520 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2521 struct nfs4_exception exception = {
2522 .state = state,
3114ea7a 2523 .inode = inode,
a1d0b5ee 2524 };
1da177e4
LT		 2525 int err;
2526 do {
1775fd3e 2527 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2528 trace_nfs4_setattr(inode, err);
451146be
TM		 2529 switch (err) {
2530 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2531 if (!(sattr->ia_valid & ATTR_SIZE)) {
2532 pr_warn_once("NFSv4: server %s is incorrectly "
2533 "applying open mode checks to "
2534 "a SETATTR that is not "
2535 "changing file size.\n",
2536 server->nfs_client->cl_hostname);
2537 }
451146be
TM		 2538 if (state && !(state->state & FMODE_WRITE)) {
2539 err = -EBADF;
2540 if (sattr->ia_valid & ATTR_OPEN)
2541 err = -EACCES;
2542 goto out;
2543 }
2544 }
2545 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2546 } while (exception.retry);
451146be 2547out:
1da177e4
LT		 2548 return err;
2549}
2550
2551struct nfs4_closedata {
2552 struct inode *inode;
2553 struct nfs4_state *state;
2554 struct nfs_closeargs arg;
2555 struct nfs_closeres res;
516a6af6 2556 struct nfs_fattr fattr;
26e976a8 2557 unsigned long timestamp;
f7e8917a
FI		 2558 bool roc;
2559 u32 roc_barrier;
1da177e4
LT		 2560};
2561
963d8fe5 2562static void nfs4_free_closedata(void *data)
9512135d 2563{
963d8fe5
TM		 2564 struct nfs4_closedata *calldata = data;
2565 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2566 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2567
f7e8917a
FI		 2568 if (calldata->roc)
2569 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2570 nfs4_put_open_state(calldata->state);
2571 nfs_free_seqid(calldata->arg.seqid);
9512135d 2572 nfs4_put_state_owner(sp);
322b2b90 2573 nfs_sb_deactive(sb);
9512135d
TM		 2574 kfree(calldata);
2575}
2576
963d8fe5 2577static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2578{
963d8fe5 2579 struct nfs4_closedata *calldata = data;
1da177e4 2580 struct nfs4_state *state = calldata->state;
1da177e4 2581 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2582 nfs4_stateid *res_stateid = NULL;
1da177e4 2583
a3ca5651 2584 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2585 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2586 return;
42113a75 2587 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2588 /* hmm. we are done with the inode, and in the process of freeing
2589 * the state_owner. we keep this around to process errors
2590 */
1da177e4
LT		 2591 switch (task->tk_status) {
2592 case 0:
412f6c4c
TM		 2593 res_stateid = &calldata->res.stateid;
2594 if (calldata->arg.fmode == 0 && calldata->roc)
f7e8917a
FI		 2595 pnfs_roc_set_barrier(state->inode,
2596 calldata->roc_barrier);
26e976a8 2597 renew_lease(server, calldata->timestamp);
412f6c4c 2598 break;
69794ad7 2599 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2600 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2601 case -NFS4ERR_OLD_STATEID:
2602 case -NFS4ERR_BAD_STATEID:
1da177e4 2603 case -NFS4ERR_EXPIRED:
566fcec6
TM		 2604 if (!nfs4_stateid_match(&calldata->arg.stateid,
2605 &state->stateid)) {
2606 rpc_restart_call_prepare(task);
2607 goto out_release;
2608 }
dc0b027d 2609 if (calldata->arg.fmode == 0)
9e33bed5 2610 break;
1da177e4 2611 default:
8478eaa1 2612 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2613 rpc_restart_call_prepare(task);
69794ad7
TM		 2614 goto out_release;
2615 }
1da177e4 2616 }
412f6c4c 2617 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
69794ad7 2618out_release:
72211dbe 2619 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2620 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2621 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2622}
2623
4ce70ada 2624static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2625{
4ce70ada 2626 struct nfs4_closedata *calldata = data;
9512135d 2627 struct nfs4_state *state = calldata->state;
7fdab069 2628 struct inode *inode = calldata->inode;
aee7af35 2629 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2630 int call_close = 0;
9512135d 2631
a3ca5651 2632 dprintk("%s: begin!\n", __func__);
963d8fe5 2633 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2634 goto out_wait;
003707c7 2635
88069f77 2636 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2637 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2638 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2639 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2640 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
566fcec6 2641 nfs4_stateid_copy(&calldata->arg.stateid, &state->stateid);
003707c7 2642 /* Calculate the change in open mode */
cd9288ff 2643 calldata->arg.fmode = 0;
e7616923 2644 if (state->n_rdwr == 0) {
cd9288ff
TM		 2645 if (state->n_rdonly == 0)
2646 call_close |= is_rdonly;
2647 else if (is_rdonly)
2648 calldata->arg.fmode |= FMODE_READ;
2649 if (state->n_wronly == 0)
2650 call_close |= is_wronly;
2651 else if (is_wronly)
2652 calldata->arg.fmode |= FMODE_WRITE;
2653 } else if (is_rdwr)
2654 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2655
2656 if (calldata->arg.fmode == 0)
2657 call_close |= is_rdwr;
2658
5d422301
TM		 2659 if (!nfs4_valid_open_stateid(state))
2660 call_close = 0;
4cecb76f 2661 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2662
2663 if (!call_close) {
963d8fe5 2664 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2665 goto out_no_action;
9512135d 2666 }
88069f77 2667
f7e8917a 2668 if (calldata->arg.fmode == 0) {
88069f77 2669 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2670 if (calldata->roc &&
b9536ad5
AA		 2671 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2672 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2673 goto out_wait;
b9536ad5 2674 }
f7e8917a 2675 }
88069f77 2676
516a6af6 2677 nfs_fattr_init(calldata->res.fattr);
26e976a8 2678 calldata->timestamp = jiffies;
7fdab069 2679 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2680 &calldata->arg.seq_args,
2681 &calldata->res.seq_res,
2240a9e2
TM		 2682 task) != 0)
2683 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2684 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2685 return;
2686out_no_action:
2687 task->tk_action = NULL;
2688out_wait:
2689 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2690}
2691
963d8fe5 2692static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2693 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2694 .rpc_call_done = nfs4_close_done,
2695 .rpc_release = nfs4_free_closedata,
2696};
2697
fe08c546
PT		 2698static bool nfs4_state_has_opener(struct nfs4_state *state)
2699{
2700 /* first check existing openers */
2701 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 &&
2702 state->n_rdonly != 0)
2703 return true;
2704
2705 if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 &&
2706 state->n_wronly != 0)
2707 return true;
2708
2709 if (test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 &&
2710 state->n_rdwr != 0)
2711 return true;
2712
2713 return false;
2714}
2715
2716static bool nfs4_roc(struct inode *inode)
2717{
2718 struct nfs_inode *nfsi = NFS_I(inode);
2719 struct nfs_open_context *ctx;
2720 struct nfs4_state *state;
2721
2722 spin_lock(&inode->i_lock);
2723 list_for_each_entry(ctx, &nfsi->open_files, list) {
2724 state = ctx->state;
2725 if (state == NULL)
2726 continue;
2727 if (nfs4_state_has_opener(state)) {
2728 spin_unlock(&inode->i_lock);
2729 return false;
2730 }
2731 }
2732 spin_unlock(&inode->i_lock);
2733
2734 if (nfs4_check_delegation(inode, FMODE_READ))
2735 return false;
2736
2737 return pnfs_roc(inode);
2738}
2739
1da177e4
LT		 2740/*
2741 * It is possible for data to be read/written from a mem-mapped file
2742 * after the sys_close call (which hits the vfs layer as a flush).
2743 * This means that we can't safely call nfsv4 close on a file until
2744 * the inode is cleared. This in turn means that we are not good
2745 * NFSv4 citizens - we do not indicate to the server to update the file's
2746 * share state even when we are done with one of the three share
2747 * stateid's in the inode.
2748 *
2749 * NOTE: Caller must be holding the sp->so_owner semaphore!
2750 */
1f7977c1 2751int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2752{
4a35bd41 2753 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2754 struct nfs4_closedata *calldata;
b39e625b
TM		 2755 struct nfs4_state_owner *sp = state->owner;
2756 struct rpc_task *task;
5138fde0
TM		 2757 struct rpc_message msg = {
2758 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2759 .rpc_cred = state->owner->so_cred,
2760 };
c970aa85
TM		 2761 struct rpc_task_setup task_setup_data = {
2762 .rpc_client = server->client,
5138fde0 2763 .rpc_message = &msg,
c970aa85 2764 .callback_ops = &nfs4_close_ops,
101070ca 2765 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2766 .flags = RPC_TASK_ASYNC,
2767 };
9512135d 2768 int status = -ENOMEM;
1da177e4 2769
fa940720
WAA		 2770 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2771 &task_setup_data.rpc_client, &msg);
2772
8535b2be 2773 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2774 if (calldata == NULL)
9512135d 2775 goto out;
a9c92d6b 2776 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2777 calldata->inode = state->inode;
1da177e4 2778 calldata->state = state;
4a35bd41 2779 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 2780 /* Serialization for the sequence id */
8535b2be 2781 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2782 if (calldata->arg.seqid == NULL)
2783 goto out_free_calldata;
dc0b027d 2784 calldata->arg.fmode = 0;
a65318bf 2785 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2786 calldata->res.fattr = &calldata->fattr;
c1d51931 2787 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2788 calldata->res.server = server;
fe08c546 2789 calldata->roc = nfs4_roc(state->inode);
643168c2 2790 nfs_sb_active(calldata->inode->i_sb);
9512135d 2791
1174dd1f
TM		 2792 msg.rpc_argp = &calldata->arg;
2793 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2794 task_setup_data.callback_data = calldata;
2795 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2796 if (IS_ERR(task))
2797 return PTR_ERR(task);
a49c3c77
TM		 2798 status = 0;
2799 if (wait)
2800 status = rpc_wait_for_completion_task(task);
b39e625b 2801 rpc_put_task(task);
a49c3c77 2802 return status;
9512135d
TM		 2803out_free_calldata:
2804 kfree(calldata);
2805out:
b39e625b
TM		 2806 nfs4_put_open_state(state);
2807 nfs4_put_state_owner(sp);
9512135d 2808 return status;
1da177e4
LT		 2809}
2810
2b484297 2811static struct inode *
5bc2afc2
TM		 2812nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2813 int open_flags, struct iattr *attr, int *opened)
1da177e4 2814{
1da177e4 2815 struct nfs4_state *state;
aa9c2669
DQ		 2816 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2817
2818 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2819
565277f6 2820 /* Protect against concurrent sillydeletes */
5bc2afc2 2821 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2822
2823 nfs4_label_release_security(label);
2824
f46e0bd3
TM		 2825 if (IS_ERR(state))
2826 return ERR_CAST(state);
275bb307 2827 return state->inode;
1da177e4
LT		 2828}
2829
1185a552 2830static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2831{
2832 if (ctx->state == NULL)
2833 return;
2834 if (is_sync)
643168c2 2835 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2836 else
643168c2 2837 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2838}
1da177e4 2839
b944dba3
TM		 2840#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2841#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2842#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2843
1da177e4
LT		 2844static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2845{
43652ad5
BH		 2846 struct nfs4_server_caps_arg args = {
2847 .fhandle = fhandle,
2848 };
1da177e4
LT		 2849 struct nfs4_server_caps_res res = {};
2850 struct rpc_message msg = {
2851 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2852 .rpc_argp = &args,
1da177e4
LT		 2853 .rpc_resp = &res,
2854 };
2855 int status;
2856
7c513058 2857 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2858 if (status == 0) {
b944dba3
TM		 2859 /* Sanity check the server answers */
2860 switch (server->nfs_client->cl_minorversion) {
2861 case 0:
2862 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2863 res.attr_bitmask[2] = 0;
2864 break;
2865 case 1:
2866 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2867 break;
2868 case 2:
2869 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2870 }
1da177e4 2871 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2872 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2873 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2874 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2875 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2876 NFS_CAP_CTIME|NFS_CAP_MTIME|
2877 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2878 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2879 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2880 server->caps |= NFS_CAP_ACLS;
2881 if (res.has_links != 0)
2882 server->caps |= NFS_CAP_HARDLINKS;
2883 if (res.has_symlinks != 0)
2884 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2885 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2886 server->caps |= NFS_CAP_FILEID;
2887 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2888 server->caps |= NFS_CAP_MODE;
2889 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2890 server->caps |= NFS_CAP_NLINK;
2891 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2892 server->caps |= NFS_CAP_OWNER;
2893 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2894 server->caps |= NFS_CAP_OWNER_GROUP;
2895 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2896 server->caps |= NFS_CAP_ATIME;
2897 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2898 server->caps |= NFS_CAP_CTIME;
2899 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2900 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2901#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2902 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2903 server->caps |= NFS_CAP_SECURITY_LABEL;
2904#endif
2905 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2906 sizeof(server->attr_bitmask));
b944dba3 2907 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2908
a65318bf
TM		 2909 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2910 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2911 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2912 server->cache_consistency_bitmask[2] = 0;
1da177e4 2913 server->acl_bitmask = res.acl_bitmask;
264e6351 2914 server->fh_expire_type = res.fh_expire_type;
1da177e4 2915 }
cccef3b9 2916
1da177e4
LT		 2917 return status;
2918}
2919
55a97593 2920int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2921{
2922 struct nfs4_exception exception = { };
2923 int err;
2924 do {
2925 err = nfs4_handle_exception(server,
2926 _nfs4_server_capabilities(server, fhandle),
2927 &exception);
2928 } while (exception.retry);
2929 return err;
2930}
2931
2932static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2933 struct nfs_fsinfo *info)
2934{
aa9c2669 2935 u32 bitmask[3];
1da177e4 2936 struct nfs4_lookup_root_arg args = {
aa9c2669 2937 .bitmask = bitmask,
1da177e4
LT		 2938 };
2939 struct nfs4_lookup_res res = {
2940 .server = server,
0e574af1 2941 .fattr = info->fattr,
1da177e4
LT		 2942 .fh = fhandle,
2943 };
2944 struct rpc_message msg = {
2945 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2946 .rpc_argp = &args,
2947 .rpc_resp = &res,
2948 };
008f55d0 2949
aa9c2669
DQ		 2950 bitmask[0] = nfs4_fattr_bitmap[0];
2951 bitmask[1] = nfs4_fattr_bitmap[1];
2952 /*
2953 * Process the label in the upcoming getfattr
2954 */
2955 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2956
0e574af1 2957 nfs_fattr_init(info->fattr);
7c513058 2958 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2959}
2960
2961static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2962 struct nfs_fsinfo *info)
2963{
2964 struct nfs4_exception exception = { };
2965 int err;
2966 do {
fb8a5ba8 2967 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2968 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2969 switch (err) {
2970 case 0:
2971 case -NFS4ERR_WRONGSEC:
05e9cfb4 2972 goto out;
fb8a5ba8
BS		 2973 default:
2974 err = nfs4_handle_exception(server, err, &exception);
2975 }
1da177e4 2976 } while (exception.retry);
05e9cfb4 2977out:
1da177e4
LT		 2978 return err;
2979}
2980
8f70e95f
BS		 2981static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2982 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2983{
c2190661
TM		 2984 struct rpc_auth_create_args auth_args = {
2985 .pseudoflavor = flavor,
2986 };
8f70e95f
BS		 2987 struct rpc_auth *auth;
2988 int ret;
2989
c2190661 2990 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 2991 if (IS_ERR(auth)) {
75bc8821 2992 ret = -EACCES;
8f70e95f
BS		 2993 goto out;
2994 }
2995 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2996out:
2997 return ret;
2998}
2999
9a744ba3
CL		 3000/*
3001 * Retry pseudoroot lookup with various security flavors. We do this when:
3002 *
3003 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3004 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3005 *
3006 * Returns zero on success, or a negative NFS4ERR value, or a
3007 * negative errno value.
3008 */
801a16dc 3009static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3010 struct nfs_fsinfo *info)
1da177e4 3011{
9a744ba3
CL		 3012 /* Per 3530bis 15.33.5 */
3013 static const rpc_authflavor_t flav_array[] = {
3014 RPC_AUTH_GSS_KRB5P,
3015 RPC_AUTH_GSS_KRB5I,
3016 RPC_AUTH_GSS_KRB5,
c4eafe11 3017 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3018 RPC_AUTH_NULL,
3019 };
3020 int status = -EPERM;
3021 size_t i;
6a1a1e34 3022
4d4b69dd
WAA		 3023 if (server->auth_info.flavor_len > 0) {
3024 /* try each flavor specified by user */
3025 for (i = 0; i < server->auth_info.flavor_len; i++) {
3026 status = nfs4_lookup_root_sec(server, fhandle, info,
3027 server->auth_info.flavors[i]);
3028 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3029 continue;
3030 break;
3031 }
3032 } else {
3033 /* no flavors specified by user, try default list */
3034 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3035 status = nfs4_lookup_root_sec(server, fhandle, info,
3036 flav_array[i]);
3037 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3038 continue;
3039 break;
3040 }
8f70e95f 3041 }
9a744ba3 3042
fb8a5ba8
BS		 3043 /*
3044 * -EACCESS could mean that the user doesn't have correct permissions
3045 * to access the mount. It could also mean that we tried to mount
3046 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3047 * existing mount programs don't handle -EACCES very well so it should
3048 * be mapped to -EPERM instead.
3049 */
3050 if (status == -EACCES)
3051 status = -EPERM;
801a16dc
BS		 3052 return status;
3053}
3054
2ed4b95b
CL		 3055static int nfs4_do_find_root_sec(struct nfs_server *server,
3056 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3057{
3058 int mv = server->nfs_client->cl_minorversion;
3059 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3060}
3061
3062/**
3063 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3064 * @server: initialized nfs_server handle
3065 * @fhandle: we fill in the pseudo-fs root file handle
3066 * @info: we fill in an FSINFO struct
5e6b1990 3067 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3068 *
3069 * Returns zero on success, or a negative errno.
801a16dc 3070 */
3028eb2b 3071int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3072 struct nfs_fsinfo *info,
3073 bool auth_probe)
801a16dc 3074{
2ed4b95b
CL		 3075 int status;
3076
5e6b1990
TM		 3077 switch (auth_probe) {
3078 case false:
3079 status = nfs4_lookup_root(server, fhandle, info);
3080 if (status != -NFS4ERR_WRONGSEC)
3081 break;
5e6b1990 3082 default:
2ed4b95b 3083 status = nfs4_do_find_root_sec(server, fhandle, info);
5e6b1990 3084 }
2ed4b95b 3085
1da177e4
LT		 3086 if (status == 0)
3087 status = nfs4_server_capabilities(server, fhandle);
3088 if (status == 0)
3089 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3090
c12e87f4 3091 return nfs4_map_errors(status);
1da177e4
LT		 3092}
3093
bae36241
BS		 3094static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3095 struct nfs_fsinfo *info)
3096{
3097 int error;
3098 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3099 struct nfs4_label *label = NULL;
bae36241
BS		 3100
3101 error = nfs4_server_capabilities(server, mntfh);
3102 if (error < 0) {
3103 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3104 return error;
3105 }
3106
14c43f76
DQ		 3107 label = nfs4_label_alloc(server, GFP_KERNEL);
3108 if (IS_ERR(label))
3109 return PTR_ERR(label);
3110
1775fd3e 3111 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3112 if (error < 0) {
3113 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3114 goto err_free_label;
bae36241
BS		 3115 }
3116
3117 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3118 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3119 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3120
14c43f76
DQ		 3121err_free_label:
3122 nfs4_label_free(label);
3123
bae36241
BS		 3124 return error;
3125}
3126
6b97fd3d
MN		 3127/*
3128 * Get locations and (maybe) other attributes of a referral.
3129 * Note that we'll actually follow the referral later when
3130 * we detect fsid mismatch in inode revalidation
3131 */
f05d147f
BS		 3132static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3133 const struct qstr *name, struct nfs_fattr *fattr,
3134 struct nfs_fh *fhandle)
6b97fd3d
MN		 3135{
3136 int status = -ENOMEM;
3137 struct page *page = NULL;
3138 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3139
3140 page = alloc_page(GFP_KERNEL);
3141 if (page == NULL)
3142 goto out;
3143 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3144 if (locations == NULL)
3145 goto out;
3146
f05d147f 3147 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3148 if (status != 0)
3149 goto out;
519ae255
CL		 3150
3151 /*
3152 * If the fsid didn't change, this is a migration event, not a
3153 * referral. Cause us to drop into the exception handler, which
3154 * will kick off migration recovery.
3155 */
6b97fd3d 3156 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3157 dprintk("%s: server did not return a different fsid for"
3158 " a referral at %s\n", __func__, name->name);
519ae255 3159 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3160 goto out;
3161 }
533eb461
AA		 3162 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3163 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3164
533eb461 3165 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3166 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3167 memset(fhandle, 0, sizeof(struct nfs_fh));
3168out:
3169 if (page)
3170 __free_page(page);
5d7ca35a 3171 kfree(locations);
6b97fd3d
MN		 3172 return status;
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_getattr_arg args = {
3179 .fh = fhandle,
3180 .bitmask = server->attr_bitmask,
3181 };
3182 struct nfs4_getattr_res res = {
3183 .fattr = fattr,
1775fd3e 3184 .label = label,
1da177e4
LT		 3185 .server = server,
3186 };
3187 struct rpc_message msg = {
3188 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3189 .rpc_argp = &args,
3190 .rpc_resp = &res,
3191 };
aa9c2669
DQ		 3192
3193 args.bitmask = nfs4_bitmask(server, label);
3194
0e574af1 3195 nfs_fattr_init(fattr);
7c513058 3196 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3197}
3198
1775fd3e
DQ		 3199static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3200 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3201{
3202 struct nfs4_exception exception = { };
3203 int err;
3204 do {
b5f875a9
TM		 3205 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3206 trace_nfs4_getattr(server, fhandle, fattr, err);
3207 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3208 &exception);
3209 } while (exception.retry);
3210 return err;
3211}
3212
3213/*
3214 * The file is not closed if it is opened due to the a request to change
3215 * the size of the file. The open call will not be needed once the
3216 * VFS layer lookup-intents are implemented.
3217 *
3218 * Close is called when the inode is destroyed.
3219 * If we haven't opened the file for O_WRONLY, we
3220 * need to in the size_change case to obtain a stateid.
3221 *
3222 * Got race?
3223 * Because OPEN is always done by name in nfsv4, it is
3224 * possible that we opened a different file by the same
3225 * name. We can recognize this race condition, but we
3226 * can't do anything about it besides returning an error.
3227 *
3228 * This will be fixed with VFS changes (lookup-intent).
3229 */
3230static int
3231nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3232 struct iattr *sattr)
3233{
08e9eac4 3234 struct inode *inode = dentry->d_inode;
659bfcd6 3235 struct rpc_cred *cred = NULL;
d530838b 3236 struct nfs4_state *state = NULL;
14c43f76 3237 struct nfs4_label *label = NULL;
1da177e4
LT		 3238 int status;
3239
88ac815c
PT		 3240 if (pnfs_ld_layoutret_on_setattr(inode) &&
3241 sattr->ia_valid & ATTR_SIZE &&
3242 sattr->ia_size < i_size_read(inode))
24028672 3243 pnfs_commit_and_return_layout(inode);
8a1636c4 3244
0e574af1 3245 nfs_fattr_init(fattr);
1da177e4 3246
2669940d
AA		 3247 /* Deal with open(O_TRUNC) */
3248 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3249 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3250
3251 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3252 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3253 return 0;
3254
d530838b 3255 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3256 if (sattr->ia_valid & ATTR_FILE) {
3257 struct nfs_open_context *ctx;
3258
3259 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3260 if (ctx) {
3261 cred = ctx->cred;
3262 state = ctx->state;
3263 }
659bfcd6 3264 }
08e9eac4 3265
14c43f76
DQ		 3266 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3267 if (IS_ERR(label))
3268 return PTR_ERR(label);
3269
3270 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3271 if (status == 0) {
65e4308d 3272 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 3273 nfs_setsecurity(inode, fattr, label);
3274 }
14c43f76 3275 nfs4_label_free(label);
1da177e4
LT		 3276 return status;
3277}
3278
0c2e53f1
TM		 3279static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3280 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3281 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3282{
0c2e53f1 3283 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3284 int status;
3285 struct nfs4_lookup_arg args = {
3286 .bitmask = server->attr_bitmask,
0c2e53f1 3287 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3288 .name = name,
3289 };
3290 struct nfs4_lookup_res res = {
3291 .server = server,
3292 .fattr = fattr,
aa9c2669 3293 .label = label,
2b3de441
DH		 3294 .fh = fhandle,
3295 };
3296 struct rpc_message msg = {
3297 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3298 .rpc_argp = &args,
3299 .rpc_resp = &res,
3300 };
3301
aa9c2669
DQ		 3302 args.bitmask = nfs4_bitmask(server, label);
3303
2b3de441
DH		 3304 nfs_fattr_init(fattr);
3305
1da177e4 3306 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3307 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3308 dprintk("NFS reply lookup: %d\n", status);
3309 return status;
3310}
3311
72de53ec 3312static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3313{
7ebb9315 3314 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3315 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3316 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3317 fattr->nlink = 2;
3318}
3319
72de53ec
BS		 3320static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3321 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3322 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3323{
3324 struct nfs4_exception exception = { };
72de53ec 3325 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3326 int err;
3327 do {
1775fd3e 3328 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3329 trace_nfs4_lookup(dir, name, err);
72de53ec 3330 switch (err) {
08ef7bd3 3331 case -NFS4ERR_BADNAME:
72de53ec
BS		 3332 err = -ENOENT;
3333 goto out;
0c2e53f1 3334 case -NFS4ERR_MOVED:
f05d147f 3335 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3336 goto out;
0c2e53f1 3337 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3338 err = -EPERM;
3339 if (client != *clnt)
3340 goto out;
66b06860 3341 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3342 if (IS_ERR(client))
3343 return PTR_ERR(client);
3344
3345 exception.retry = 1;
3346 break;
3347 default:
3348 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3349 }
1da177e4 3350 } while (exception.retry);
72de53ec
BS		 3351
3352out:
3353 if (err == 0)
3354 *clnt = client;
3355 else if (client != *clnt)
3356 rpc_shutdown_client(client);
3357
1da177e4
LT		 3358 return err;
3359}
3360
80a16b21 3361static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3362 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3363 struct nfs4_label *label)
72de53ec
BS		 3364{
3365 int status;
3366 struct rpc_clnt *client = NFS_CLIENT(dir);
3367
1775fd3e 3368 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3369 if (client != NFS_CLIENT(dir)) {
3370 rpc_shutdown_client(client);
3371 nfs_fixup_secinfo_attributes(fattr);
3372 }
3373 return status;
3374}
3375
f05d147f
BS		 3376struct rpc_clnt *
3377nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3378 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3379{
b72888cb 3380 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3381 int status;
f05d147f 3382
1775fd3e 3383 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3384 if (status < 0)
f05d147f 3385 return ERR_PTR(status);
b72888cb 3386 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3387}
3388
1da177e4
LT		 3389static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3390{
76b32999 3391 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3392 struct nfs4_accessargs args = {
3393 .fh = NFS_FH(inode),
a4980e78 3394 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3395 };
3396 struct nfs4_accessres res = {
3397 .server = server,
1da177e4 3398 };
1da177e4
LT		 3399 struct rpc_message msg = {
3400 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3401 .rpc_argp = &args,
3402 .rpc_resp = &res,
3403 .rpc_cred = entry->cred,
3404 };
3405 int mode = entry->mask;
aa9c2669 3406 int status = 0;
1da177e4
LT		 3407
3408 /*
3409 * Determine which access bits we want to ask for...
3410 */
3411 if (mode & MAY_READ)
3412 args.access |= NFS4_ACCESS_READ;
3413 if (S_ISDIR(inode->i_mode)) {
3414 if (mode & MAY_WRITE)
3415 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3416 if (mode & MAY_EXEC)
3417 args.access |= NFS4_ACCESS_LOOKUP;
3418 } else {
3419 if (mode & MAY_WRITE)
3420 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3421 if (mode & MAY_EXEC)
3422 args.access |= NFS4_ACCESS_EXECUTE;
3423 }
c407d41a
TM		 3424
3425 res.fattr = nfs_alloc_fattr();
3426 if (res.fattr == NULL)
3427 return -ENOMEM;
3428
7c513058 3429 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3430 if (!status) {
6168f62c 3431 nfs_access_set_mask(entry, res.access);
c407d41a 3432 nfs_refresh_inode(inode, res.fattr);
1da177e4 3433 }
c407d41a 3434 nfs_free_fattr(res.fattr);
1da177e4
LT		 3435 return status;
3436}
3437
3438static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3439{
3440 struct nfs4_exception exception = { };
3441 int err;
3442 do {
c1578b76
TM		 3443 err = _nfs4_proc_access(inode, entry);
3444 trace_nfs4_access(inode, err);
3445 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3446 &exception);
3447 } while (exception.retry);
3448 return err;
3449}
3450
3451/*
3452 * TODO: For the time being, we don't try to get any attributes
3453 * along with any of the zero-copy operations READ, READDIR,
3454 * READLINK, WRITE.
3455 *
3456 * In the case of the first three, we want to put the GETATTR
3457 * after the read-type operation -- this is because it is hard
3458 * to predict the length of a GETATTR response in v4, and thus
3459 * align the READ data correctly. This means that the GETATTR
3460 * may end up partially falling into the page cache, and we should
3461 * shift it into the 'tail' of the xdr_buf before processing.
3462 * To do this efficiently, we need to know the total length
3463 * of data received, which doesn't seem to be available outside
3464 * of the RPC layer.
3465 *
3466 * In the case of WRITE, we also want to put the GETATTR after
3467 * the operation -- in this case because we want to make sure
140150db 3468 * we get the post-operation mtime and size.
1da177e4
LT		 3469 *
3470 * Both of these changes to the XDR layer would in fact be quite
3471 * minor, but I decided to leave them for a subsequent patch.
3472 */
3473static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3474 unsigned int pgbase, unsigned int pglen)
3475{
3476 struct nfs4_readlink args = {
3477 .fh = NFS_FH(inode),
3478 .pgbase = pgbase,
3479 .pglen = pglen,
3480 .pages = &page,
3481 };
f50c7000 3482 struct nfs4_readlink_res res;
1da177e4
LT		 3483 struct rpc_message msg = {
3484 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3485 .rpc_argp = &args,
f50c7000 3486 .rpc_resp = &res,
1da177e4
LT		 3487 };
3488
7c513058 3489 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3490}
3491
3492static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3493 unsigned int pgbase, unsigned int pglen)
3494{
3495 struct nfs4_exception exception = { };
3496 int err;
3497 do {
c1578b76
TM		 3498 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3499 trace_nfs4_readlink(inode, err);
3500 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3501 &exception);
3502 } while (exception.retry);
3503 return err;
3504}
3505
1da177e4 3506/*
8867fe58 3507 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3508 */
1da177e4
LT		 3509static int
3510nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3511 int flags)
1da177e4 3512{
aa9c2669 3513 struct nfs4_label l, *ilabel = NULL;
8867fe58 3514 struct nfs_open_context *ctx;
1da177e4 3515 struct nfs4_state *state;
5bc2afc2 3516 int opened = 0;
1da177e4
LT		 3517 int status = 0;
3518
8867fe58
MS		 3519 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3520 if (IS_ERR(ctx))
3521 return PTR_ERR(ctx);
3522
aa9c2669
DQ		 3523 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3524
a8a5da99 3525 sattr->ia_mode &= ~current_umask();
5bc2afc2 3526 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3527 if (IS_ERR(state)) {
3528 status = PTR_ERR(state);
c0204fd2 3529 goto out;
1da177e4 3530 }
1da177e4 3531out:
aa9c2669 3532 nfs4_label_release_security(ilabel);
8867fe58 3533 put_nfs_open_context(ctx);
1da177e4
LT		 3534 return status;
3535}
3536
3537static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3538{
16e42959 3539 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3540 struct nfs_removeargs args = {
1da177e4 3541 .fh = NFS_FH(dir),
26fe5750 3542 .name = *name,
16e42959 3543 };
4fdc17b2 3544 struct nfs_removeres res = {
16e42959 3545 .server = server,
1da177e4 3546 };
1da177e4 3547 struct rpc_message msg = {
4fdc17b2
TM		 3548 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3549 .rpc_argp = &args,
3550 .rpc_resp = &res,
1da177e4 3551 };
778d2817 3552 int status;
1da177e4 3553
7c513058 3554 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3555 if (status == 0)
16e42959 3556 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3557 return status;
3558}
3559
3560static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3561{
3562 struct nfs4_exception exception = { };
3563 int err;
3564 do {
078ea3df
TM		 3565 err = _nfs4_proc_remove(dir, name);
3566 trace_nfs4_remove(dir, name, err);
3567 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3568 &exception);
3569 } while (exception.retry);
3570 return err;
3571}
3572
e4eff1a6 3573static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3574{
e4eff1a6
TM		 3575 struct nfs_server *server = NFS_SERVER(dir);
3576 struct nfs_removeargs *args = msg->rpc_argp;
3577 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3578
e4eff1a6 3579 res->server = server;
1da177e4 3580 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3581 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3582
3583 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3584}
3585
34e137cc
BS		 3586static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3587{
d9afbd1b
TM		 3588 nfs4_setup_sequence(NFS_SERVER(data->dir),
3589 &data->args.seq_args,
3590 &data->res.seq_res,
3591 task);
1da177e4
LT		 3592}
3593
e4eff1a6 3594static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3595{
078ea3df
TM		 3596 struct nfs_unlinkdata *data = task->tk_calldata;
3597 struct nfs_removeres *res = &data->res;
e4eff1a6 3598
14516c3a
TM		 3599 if (!nfs4_sequence_done(task, &res->seq_res))
3600 return 0;
8478eaa1
N		 3601 if (nfs4_async_handle_error(task, res->server, NULL,
3602 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3603 return 0;
3604 update_changeattr(dir, &res->cinfo);
e4eff1a6 3605 return 1;
1da177e4
LT		 3606}
3607
d3d4152a
JL		 3608static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3609{
3610 struct nfs_server *server = NFS_SERVER(dir);
3611 struct nfs_renameargs *arg = msg->rpc_argp;
3612 struct nfs_renameres *res = msg->rpc_resp;
3613
3614 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3615 res->server = server;
a9c92d6b 3616 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3617}
3618
c6bfa1a1
BS		 3619static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3620{
d9afbd1b
TM		 3621 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3622 &data->args.seq_args,
3623 &data->res.seq_res,
3624 task);
d3d4152a
JL		 3625}
3626
3627static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3628 struct inode *new_dir)
3629{
fbc6f7c2
TM		 3630 struct nfs_renamedata *data = task->tk_calldata;
3631 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3632
3633 if (!nfs4_sequence_done(task, &res->seq_res))
3634 return 0;
8478eaa1 3635 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3636 return 0;
3637
3638 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3639 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3640 return 1;
3641}
3642
1da177e4
LT		 3643static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3644{
91ba2eee 3645 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3646 struct nfs4_link_arg arg = {
3647 .fh = NFS_FH(inode),
3648 .dir_fh = NFS_FH(dir),
3649 .name = name,
91ba2eee
TM		 3650 .bitmask = server->attr_bitmask,
3651 };
91ba2eee
TM		 3652 struct nfs4_link_res res = {
3653 .server = server,
1775fd3e 3654 .label = NULL,
1da177e4 3655 };
1da177e4
LT		 3656 struct rpc_message msg = {
3657 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3658 .rpc_argp = &arg,
91ba2eee 3659 .rpc_resp = &res,
1da177e4 3660 };
136f2627
TM		 3661 int status = -ENOMEM;
3662
3663 res.fattr = nfs_alloc_fattr();
778d2817 3664 if (res.fattr == NULL)
136f2627 3665 goto out;
1da177e4 3666
14c43f76
DQ		 3667 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3668 if (IS_ERR(res.label)) {
3669 status = PTR_ERR(res.label);
3670 goto out;
3671 }
aa9c2669 3672 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3673
7c513058 3674 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3675 if (!status) {
3676 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3677 status = nfs_post_op_update_inode(inode, res.fattr);
3678 if (!status)
3679 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3680 }
14c43f76
DQ		 3681
3682
3683 nfs4_label_free(res.label);
3684
136f2627 3685out:
136f2627 3686 nfs_free_fattr(res.fattr);
1da177e4
LT		 3687 return status;
3688}
3689
3690static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3691{
3692 struct nfs4_exception exception = { };
3693 int err;
3694 do {
3695 err = nfs4_handle_exception(NFS_SERVER(inode),
3696 _nfs4_proc_link(inode, dir, name),
3697 &exception);
3698 } while (exception.retry);
3699 return err;
3700}
3701
57dc9a57
TM		 3702struct nfs4_createdata {
3703 struct rpc_message msg;
3704 struct nfs4_create_arg arg;
3705 struct nfs4_create_res res;
3706 struct nfs_fh fh;
3707 struct nfs_fattr fattr;
1775fd3e 3708 struct nfs4_label *label;
57dc9a57
TM		 3709};
3710
3711static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3712 struct qstr *name, struct iattr *sattr, u32 ftype)
3713{
3714 struct nfs4_createdata *data;
3715
3716 data = kzalloc(sizeof(*data), GFP_KERNEL);
3717 if (data != NULL) {
3718 struct nfs_server *server = NFS_SERVER(dir);
3719
14c43f76
DQ		 3720 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3721 if (IS_ERR(data->label))
3722 goto out_free;
3723
57dc9a57
TM		 3724 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3725 data->msg.rpc_argp = &data->arg;
3726 data->msg.rpc_resp = &data->res;
3727 data->arg.dir_fh = NFS_FH(dir);
3728 data->arg.server = server;
3729 data->arg.name = name;
3730 data->arg.attrs = sattr;
3731 data->arg.ftype = ftype;
aa9c2669 3732 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3733 data->res.server = server;
3734 data->res.fh = &data->fh;
3735 data->res.fattr = &data->fattr;
1775fd3e 3736 data->res.label = data->label;
57dc9a57 3737 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3738 }
3739 return data;
14c43f76
DQ		 3740out_free:
3741 kfree(data);
3742 return NULL;
57dc9a57
TM		 3743}
3744
3745static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3746{
7c513058 3747 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3748 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3749 if (status == 0) {
3750 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3751 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3752 }
3753 return status;
3754}
3755
3756static void nfs4_free_createdata(struct nfs4_createdata *data)
3757{
14c43f76 3758 nfs4_label_free(data->label);
57dc9a57
TM		 3759 kfree(data);
3760}
3761
4f390c15 3762static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3763 struct page *page, unsigned int len, struct iattr *sattr,
3764 struct nfs4_label *label)
1da177e4 3765{
57dc9a57
TM		 3766 struct nfs4_createdata *data;
3767 int status = -ENAMETOOLONG;
1da177e4 3768
94a6d753 3769 if (len > NFS4_MAXPATHLEN)
57dc9a57 3770 goto out;
4f390c15 3771
57dc9a57
TM		 3772 status = -ENOMEM;
3773 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3774 if (data == NULL)
3775 goto out;
3776
3777 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3778 data->arg.u.symlink.pages = &page;
3779 data->arg.u.symlink.len = len;
1775fd3e 3780 data->arg.label = label;
1da177e4 3781
57dc9a57
TM		 3782 status = nfs4_do_create(dir, dentry, data);
3783
3784 nfs4_free_createdata(data);
3785out:
1da177e4
LT		 3786 return status;
3787}
3788
4f390c15 3789static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3790 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3791{
3792 struct nfs4_exception exception = { };
aa9c2669 3793 struct nfs4_label l, *label = NULL;
1da177e4 3794 int err;
aa9c2669
DQ		 3795
3796 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3797
1da177e4 3798 do {
078ea3df
TM		 3799 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3800 trace_nfs4_symlink(dir, &dentry->d_name, err);
3801 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3802 &exception);
3803 } while (exception.retry);
aa9c2669
DQ		 3804
3805 nfs4_label_release_security(label);
1da177e4
LT		 3806 return err;
3807}
3808
3809static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3810 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3811{
57dc9a57
TM		 3812 struct nfs4_createdata *data;
3813 int status = -ENOMEM;
1da177e4 3814
57dc9a57
TM		 3815 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3816 if (data == NULL)
3817 goto out;
3818
1775fd3e 3819 data->arg.label = label;
57dc9a57
TM		 3820 status = nfs4_do_create(dir, dentry, data);
3821
3822 nfs4_free_createdata(data);
3823out:
1da177e4
LT		 3824 return status;
3825}
3826
3827static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3828 struct iattr *sattr)
3829{
3830 struct nfs4_exception exception = { };
aa9c2669 3831 struct nfs4_label l, *label = NULL;
1da177e4 3832 int err;
a8a5da99 3833
aa9c2669
DQ		 3834 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3835
a8a5da99 3836 sattr->ia_mode &= ~current_umask();
1da177e4 3837 do {
078ea3df
TM		 3838 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3839 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3840 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3841 &exception);
3842 } while (exception.retry);
aa9c2669
DQ		 3843 nfs4_label_release_security(label);
3844
1da177e4
LT		 3845 return err;
3846}
3847
3848static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3849 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3850{
3851 struct inode *dir = dentry->d_inode;
3852 struct nfs4_readdir_arg args = {
3853 .fh = NFS_FH(dir),
56e4ebf8 3854 .pages = pages,
1da177e4
LT		 3855 .pgbase = 0,
3856 .count = count,
96d25e53 3857 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3858 .plus = plus,
1da177e4
LT		 3859 };
3860 struct nfs4_readdir_res res;
3861 struct rpc_message msg = {
3862 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3863 .rpc_argp = &args,
3864 .rpc_resp = &res,
3865 .rpc_cred = cred,
3866 };
3867 int status;
3868
6de1472f
AV		 3869 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3870 dentry,
eadf4598 3871 (unsigned long long)cookie);
c3f52af3 3872 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3873 res.pgbase = args.pgbase;
7c513058 3874 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3875 if (status >= 0) {
c3f52af3 3876 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3877 status += args.pgbase;
3878 }
c4812998
TM		 3879
3880 nfs_invalidate_atime(dir);
3881
3110ff80 3882 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3883 return status;
3884}
3885
3886static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3887 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3888{
3889 struct nfs4_exception exception = { };
3890 int err;
3891 do {
c1578b76
TM		 3892 err = _nfs4_proc_readdir(dentry, cred, cookie,
3893 pages, count, plus);
3894 trace_nfs4_readdir(dentry->d_inode, err);
3895 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3896 &exception);
3897 } while (exception.retry);
3898 return err;
3899}
3900
3901static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3902 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3903{
57dc9a57
TM		 3904 struct nfs4_createdata *data;
3905 int mode = sattr->ia_mode;
3906 int status = -ENOMEM;
1da177e4 3907
57dc9a57
TM		 3908 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3909 if (data == NULL)
3910 goto out;
3911
1da177e4 3912 if (S_ISFIFO(mode))
57dc9a57 3913 data->arg.ftype = NF4FIFO;
1da177e4 3914 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3915 data->arg.ftype = NF4BLK;
3916 data->arg.u.device.specdata1 = MAJOR(rdev);
3917 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3918 }
3919 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3920 data->arg.ftype = NF4CHR;
3921 data->arg.u.device.specdata1 = MAJOR(rdev);
3922 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3923 } else if (!S_ISSOCK(mode)) {
3924 status = -EINVAL;
3925 goto out_free;
1da177e4 3926 }
1775fd3e 3927
aa9c2669 3928 data->arg.label = label;
57dc9a57 3929 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3930out_free:
57dc9a57
TM		 3931 nfs4_free_createdata(data);
3932out:
1da177e4
LT		 3933 return status;
3934}
3935
3936static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3937 struct iattr *sattr, dev_t rdev)
3938{
3939 struct nfs4_exception exception = { };
aa9c2669 3940 struct nfs4_label l, *label = NULL;
1da177e4 3941 int err;
a8a5da99 3942
aa9c2669
DQ		 3943 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3944
a8a5da99 3945 sattr->ia_mode &= ~current_umask();
1da177e4 3946 do {
078ea3df
TM		 3947 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3948 trace_nfs4_mknod(dir, &dentry->d_name, err);
3949 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3950 &exception);
3951 } while (exception.retry);
aa9c2669
DQ		 3952
3953 nfs4_label_release_security(label);
3954
1da177e4
LT		 3955 return err;
3956}
3957
3958static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3959 struct nfs_fsstat *fsstat)
3960{
3961 struct nfs4_statfs_arg args = {
3962 .fh = fhandle,
3963 .bitmask = server->attr_bitmask,
3964 };
24ad148a
BH		 3965 struct nfs4_statfs_res res = {
3966 .fsstat = fsstat,
3967 };
1da177e4
LT		 3968 struct rpc_message msg = {
3969 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3970 .rpc_argp = &args,
24ad148a 3971 .rpc_resp = &res,
1da177e4
LT		 3972 };
3973
0e574af1 3974 nfs_fattr_init(fsstat->fattr);
7c513058 3975 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3976}
3977
3978static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3979{
3980 struct nfs4_exception exception = { };
3981 int err;
3982 do {
3983 err = nfs4_handle_exception(server,
3984 _nfs4_proc_statfs(server, fhandle, fsstat),
3985 &exception);
3986 } while (exception.retry);
3987 return err;
3988}
3989
3990static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3991 struct nfs_fsinfo *fsinfo)
3992{
3993 struct nfs4_fsinfo_arg args = {
3994 .fh = fhandle,
3995 .bitmask = server->attr_bitmask,
3996 };
3dda5e43
BH		 3997 struct nfs4_fsinfo_res res = {
3998 .fsinfo = fsinfo,
3999 };
1da177e4
LT		 4000 struct rpc_message msg = {
4001 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4002 .rpc_argp = &args,
3dda5e43 4003 .rpc_resp = &res,
1da177e4
LT		 4004 };
4005
7c513058 4006 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4007}
4008
4009static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4010{
4011 struct nfs4_exception exception = { };
83ca7f5a 4012 unsigned long now = jiffies;
1da177e4
LT		 4013 int err;
4014
4015 do {
83ca7f5a 4016 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4017 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4018 if (err == 0) {
4019 struct nfs_client *clp = server->nfs_client;
4020
4021 spin_lock(&clp->cl_lock);
4022 clp->cl_lease_time = fsinfo->lease_time * HZ;
4023 clp->cl_last_renewal = now;
4024 spin_unlock(&clp->cl_lock);
4025 break;
4026 }
4027 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4028 } while (exception.retry);
4029 return err;
4030}
4031
4032static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4033{
e38eb650
BS		 4034 int error;
4035
0e574af1 4036 nfs_fattr_init(fsinfo->fattr);
e38eb650 4037 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4038 if (error == 0) {
4039 /* block layout checks this! */
4040 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4041 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4042 }
e38eb650
BS		 4043
4044 return error;
1da177e4
LT		 4045}
4046
4047static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4048 struct nfs_pathconf *pathconf)
4049{
4050 struct nfs4_pathconf_arg args = {
4051 .fh = fhandle,
4052 .bitmask = server->attr_bitmask,
4053 };
d45b2989
BH		 4054 struct nfs4_pathconf_res res = {
4055 .pathconf = pathconf,
4056 };
1da177e4
LT		 4057 struct rpc_message msg = {
4058 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4059 .rpc_argp = &args,
d45b2989 4060 .rpc_resp = &res,
1da177e4
LT		 4061 };
4062
4063 /* None of the pathconf attributes are mandatory to implement */
4064 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4065 memset(pathconf, 0, sizeof(*pathconf));
4066 return 0;
4067 }
4068
0e574af1 4069 nfs_fattr_init(pathconf->fattr);
7c513058 4070 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4071}
4072
4073static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4074 struct nfs_pathconf *pathconf)
4075{
4076 struct nfs4_exception exception = { };
4077 int err;
4078
4079 do {
4080 err = nfs4_handle_exception(server,
4081 _nfs4_proc_pathconf(server, fhandle, pathconf),
4082 &exception);
4083 } while (exception.retry);
4084 return err;
4085}
4086
5521abfd 4087int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4088 const struct nfs_open_context *ctx,
4089 const struct nfs_lock_context *l_ctx,
4090 fmode_t fmode)
4091{
4092 const struct nfs_lockowner *lockowner = NULL;
4093
4094 if (l_ctx != NULL)
4095 lockowner = &l_ctx->lockowner;
5521abfd 4096 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4097}
4098EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4099
5521abfd
TM		 4100static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4101 const struct nfs_open_context *ctx,
4102 const struct nfs_lock_context *l_ctx,
4103 fmode_t fmode)
4104{
4105 nfs4_stateid current_stateid;
4106
e1253be0
TM		 4107 /* If the current stateid represents a lost lock, then exit */
4108 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4109 return true;
5521abfd
TM		 4110 return nfs4_stateid_match(stateid, &current_stateid);
4111}
4112
4113static bool nfs4_error_stateid_expired(int err)
4114{
4115 switch (err) {
4116 case -NFS4ERR_DELEG_REVOKED:
4117 case -NFS4ERR_ADMIN_REVOKED:
4118 case -NFS4ERR_BAD_STATEID:
4119 case -NFS4ERR_STALE_STATEID:
4120 case -NFS4ERR_OLD_STATEID:
4121 case -NFS4ERR_OPENMODE:
4122 case -NFS4ERR_EXPIRED:
4123 return true;
4124 }
4125 return false;
4126}
4127
d45f60c6 4128void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4129{
d45f60c6 4130 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4131}
4132
d45f60c6 4133static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4134{
d45f60c6 4135 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4136
d45f60c6
WAA		 4137 trace_nfs4_read(hdr, task->tk_status);
4138 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4139 hdr->args.context->state,
4140 NULL) == -EAGAIN) {
d00c5d43 4141 rpc_restart_call_prepare(task);
ec06c096 4142 return -EAGAIN;
1da177e4 4143 }
8850df99 4144
d45f60c6 4145 __nfs4_read_done_cb(hdr);
1da177e4 4146 if (task->tk_status > 0)
d45f60c6 4147 renew_lease(server, hdr->timestamp);
ec06c096 4148 return 0;
1da177e4
LT		 4149}
4150
5521abfd 4151static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4152 struct nfs_pgio_args *args)
5521abfd
TM		 4153{
4154
4155 if (!nfs4_error_stateid_expired(task->tk_status) ||
4156 nfs4_stateid_is_current(&args->stateid,
4157 args->context,
4158 args->lock_context,
4159 FMODE_READ))
4160 return false;
4161 rpc_restart_call_prepare(task);
4162 return true;
4163}
4164
d45f60c6 4165static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4166{
4167
4168 dprintk("--> %s\n", __func__);
4169
d45f60c6 4170 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4171 return -EAGAIN;
d45f60c6 4172 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4173 return -EAGAIN;
d45f60c6
WAA		 4174 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4175 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4176}
4177
d45f60c6
WAA		 4178static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4179 struct rpc_message *msg)
1da177e4 4180{
d45f60c6
WAA		 4181 hdr->timestamp = jiffies;
4182 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4183 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4184 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4185}
4186
d45f60c6
WAA		 4187static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4188 struct nfs_pgio_header *hdr)
ea7c3303 4189{
d45f60c6
WAA		 4190 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4191 &hdr->args.seq_args,
4192 &hdr->res.seq_res,
9b206149 4193 task))
ef1820f9 4194 return 0;
d45f60c6
WAA		 4195 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4196 hdr->args.lock_context,
4197 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4198 return -EIO;
d45f60c6 4199 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4200 return -EIO;
4201 return 0;
1da177e4
LT		 4202}
4203
d45f60c6
WAA		 4204static int nfs4_write_done_cb(struct rpc_task *task,
4205 struct nfs_pgio_header *hdr)
1da177e4 4206{
d45f60c6 4207 struct inode *inode = hdr->inode;
8478eaa1 4208
d45f60c6
WAA		 4209 trace_nfs4_write(hdr, task->tk_status);
4210 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4211 hdr->args.context->state,
4212 NULL) == -EAGAIN) {
d00c5d43 4213 rpc_restart_call_prepare(task);
788e7a89 4214 return -EAGAIN;
1da177e4 4215 }
4f9838c7 4216 if (task->tk_status >= 0) {
d45f60c6
WAA		 4217 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4218 nfs_post_op_update_inode_force_wcc(inode, &hdr->fattr);
4f9838c7 4219 }
788e7a89 4220 return 0;
1da177e4
LT		 4221}
4222
5521abfd 4223static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4224 struct nfs_pgio_args *args)
5521abfd
TM		 4225{
4226
4227 if (!nfs4_error_stateid_expired(task->tk_status) ||
4228 nfs4_stateid_is_current(&args->stateid,
4229 args->context,
4230 args->lock_context,
4231 FMODE_WRITE))
4232 return false;
4233 rpc_restart_call_prepare(task);
4234 return true;
4235}
4236
d45f60c6 4237static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4238{
d45f60c6 4239 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4240 return -EAGAIN;
d45f60c6 4241 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4242 return -EAGAIN;
d45f60c6
WAA		 4243 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4244 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4245}
4246
5a37f851 4247static
d45f60c6 4248bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4249{
5a37f851 4250 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4251 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4252 return false;
4253 /* Otherwise, request attributes if and only if we don't hold
4254 * a delegation
4255 */
011e2a7f 4256 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4257}
a69aef14 4258
d45f60c6
WAA		 4259static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4260 struct rpc_message *msg)
1da177e4 4261{
d45f60c6 4262 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4263
d45f60c6
WAA		 4264 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4265 hdr->args.bitmask = NULL;
4266 hdr->res.fattr = NULL;
7ffd1064 4267 } else
d45f60c6 4268 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4269
d45f60c6
WAA		 4270 if (!hdr->pgio_done_cb)
4271 hdr->pgio_done_cb = nfs4_write_done_cb;
4272 hdr->res.server = server;
4273 hdr->timestamp = jiffies;
1da177e4 4274
bdc7f021 4275 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4276 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4277}
4278
0b7c0153 4279static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4280{
d9afbd1b
TM		 4281 nfs4_setup_sequence(NFS_SERVER(data->inode),
4282 &data->args.seq_args,
4283 &data->res.seq_res,
4284 task);
1da177e4
LT		 4285}
4286
0b7c0153 4287static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4288{
1da177e4 4289 struct inode *inode = data->inode;
14516c3a 4290
cc668ab3 4291 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4292 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4293 NULL, NULL) == -EAGAIN) {
d00c5d43 4294 rpc_restart_call_prepare(task);
788e7a89 4295 return -EAGAIN;
1da177e4 4296 }
788e7a89 4297 return 0;
1da177e4
LT		 4298}
4299
0b7c0153 4300static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4301{
4302 if (!nfs4_sequence_done(task, &data->res.seq_res))
4303 return -EAGAIN;
0b7c0153 4304 return data->commit_done_cb(task, data);
5f452431
FI		 4305}
4306
0b7c0153 4307static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4308{
788e7a89 4309 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4310
0b7c0153
FI		 4311 if (data->commit_done_cb == NULL)
4312 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4313 data->res.server = server;
bdc7f021 4314 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4315 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4316}
4317
9bc4e3ca
CL		 4318struct nfs4_renewdata {
4319 struct nfs_client *client;
4320 unsigned long timestamp;
4321};
4322
1da177e4
LT		 4323/*
4324 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4325 * standalone procedure for queueing an asynchronous RENEW.
4326 */
9bc4e3ca 4327static void nfs4_renew_release(void *calldata)
dc96aef9 4328{
9bc4e3ca
CL		 4329 struct nfs4_renewdata *data = calldata;
4330 struct nfs_client *clp = data->client;
dc96aef9 4331
0851de06
AB		 4332 if (atomic_read(&clp->cl_count) > 1)
4333 nfs4_schedule_state_renewal(clp);
4334 nfs_put_client(clp);
9bc4e3ca 4335 kfree(data);
dc96aef9
AB		 4336}
4337
9bc4e3ca 4338static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4339{
9bc4e3ca
CL		 4340 struct nfs4_renewdata *data = calldata;
4341 struct nfs_client *clp = data->client;
4342 unsigned long timestamp = data->timestamp;
1da177e4 4343
c6d01c6f 4344 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4345 switch (task->tk_status) {
4346 case 0:
4347 break;
4348 case -NFS4ERR_LEASE_MOVED:
4349 nfs4_schedule_lease_moved_recovery(clp);
4350 break;
4351 default:
95baa25c 4352 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4353 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4354 return;
4355 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4356 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4357 return;
4358 }
4359 nfs4_schedule_path_down_recovery(clp);
1da177e4 4360 }
452e9352 4361 do_renew_lease(clp, timestamp);
1da177e4
LT		 4362}
4363
963d8fe5
TM		 4364static const struct rpc_call_ops nfs4_renew_ops = {
4365 .rpc_call_done = nfs4_renew_done,
dc96aef9 4366 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4367};
4368
2f60ea6b 4369static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4370{
4371 struct rpc_message msg = {
4372 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4373 .rpc_argp = clp,
b4454fe1 4374 .rpc_cred = cred,
1da177e4 4375 };
9bc4e3ca 4376 struct nfs4_renewdata *data;
1da177e4 4377
2f60ea6b
TM		 4378 if (renew_flags == 0)
4379 return 0;
0851de06
AB		 4380 if (!atomic_inc_not_zero(&clp->cl_count))
4381 return -EIO;
b569ad34 4382 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4383 if (data == NULL)
4384 return -ENOMEM;
4385 data->client = clp;
4386 data->timestamp = jiffies;
bc7a05ca 4387 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4388 &nfs4_renew_ops, data);
1da177e4
LT		 4389}
4390
8534d4ec 4391static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4392{
4393 struct rpc_message msg = {
4394 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4395 .rpc_argp = clp,
b4454fe1 4396 .rpc_cred = cred,
1da177e4
LT		 4397 };
4398 unsigned long now = jiffies;
4399 int status;
4400
bc7a05ca 4401 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4402 if (status < 0)
4403 return status;
452e9352 4404 do_renew_lease(clp, now);
1da177e4
LT		 4405 return 0;
4406}
4407
aa1870af
BF		 4408static inline int nfs4_server_supports_acls(struct nfs_server *server)
4409{
7dd7d959 4410 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4411}
4412
21f498c2
TM		 4413/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4414 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4415 * the stack.
4416 */
21f498c2 4417#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4418
e9e3d724
NH		 4419static int buf_to_pages_noslab(const void *buf, size_t buflen,
4420 struct page **pages, unsigned int *pgbase)
4421{
4422 struct page *newpage, **spages;
4423 int rc = 0;
4424 size_t len;
4425 spages = pages;
4426
4427 do {
21f498c2 4428 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4429 newpage = alloc_page(GFP_KERNEL);
4430
4431 if (newpage == NULL)
4432 goto unwind;
4433 memcpy(page_address(newpage), buf, len);
4434 buf += len;
4435 buflen -= len;
4436 *pages++ = newpage;
4437 rc++;
4438 } while (buflen != 0);
4439
4440 return rc;
4441
4442unwind:
4443 for(; rc > 0; rc--)
4444 __free_page(spages[rc-1]);
4445 return -ENOMEM;
4446}
4447
e50a1c2e
BF		 4448struct nfs4_cached_acl {
4449 int cached;
4450 size_t len;
3e9d4154 4451 char data[0];
e50a1c2e
BF		 4452};
4453
4454static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4455{
4456 struct nfs_inode *nfsi = NFS_I(inode);
4457
4458 spin_lock(&inode->i_lock);
4459 kfree(nfsi->nfs4_acl);
4460 nfsi->nfs4_acl = acl;
4461 spin_unlock(&inode->i_lock);
4462}
4463
4464static void nfs4_zap_acl_attr(struct inode *inode)
4465{
4466 nfs4_set_cached_acl(inode, NULL);
4467}
4468
4469static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4470{
4471 struct nfs_inode *nfsi = NFS_I(inode);
4472 struct nfs4_cached_acl *acl;
4473 int ret = -ENOENT;
4474
4475 spin_lock(&inode->i_lock);
4476 acl = nfsi->nfs4_acl;
4477 if (acl == NULL)
4478 goto out;
4479 if (buf == NULL) /* user is just asking for length */
4480 goto out_len;
4481 if (acl->cached == 0)
4482 goto out;
4483 ret = -ERANGE; /* see getxattr(2) man page */
4484 if (acl->len > buflen)
4485 goto out;
4486 memcpy(buf, acl->data, acl->len);
4487out_len:
4488 ret = acl->len;
4489out:
4490 spin_unlock(&inode->i_lock);
4491 return ret;
4492}
4493
5794d21e 4494static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4495{
4496 struct nfs4_cached_acl *acl;
b291f1b1 4497 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4498
1f1ea6c2 4499 if (buflen <= PAGE_SIZE) {
b291f1b1 4500 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4501 if (acl == NULL)
4502 goto out;
4503 acl->cached = 1;
5794d21e 4504 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4505 } else {
4506 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4507 if (acl == NULL)
4508 goto out;
4509 acl->cached = 0;
4510 }
4511 acl->len = acl_len;
4512out:
4513 nfs4_set_cached_acl(inode, acl);
4514}
4515
bf118a34
AA		 4516/*
4517 * The getxattr API returns the required buffer length when called with a
4518 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4519 * the required buf. On a NULL buf, we send a page of data to the server
4520 * guessing that the ACL request can be serviced by a page. If so, we cache
4521 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4522 * the cache. If not so, we throw away the page, and cache the required
4523 * length. The next getxattr call will then produce another round trip to
4524 * the server, this time with the input buf of the required size.
4525 */
16b4289c 4526static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4527{
bf118a34 4528 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4529 struct nfs_getaclargs args = {
4530 .fh = NFS_FH(inode),
4531 .acl_pages = pages,
4532 .acl_len = buflen,
4533 };
663c79b3
BH		 4534 struct nfs_getaclres res = {
4535 .acl_len = buflen,
4536 };
aa1870af
BF		 4537 struct rpc_message msg = {
4538 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4539 .rpc_argp = &args,
663c79b3 4540 .rpc_resp = &res,
aa1870af 4541 };
21f498c2
TM		 4542 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4543 int ret = -ENOMEM, i;
aa1870af 4544
bf118a34
AA		 4545 /* As long as we're doing a round trip to the server anyway,
4546 * let's be prepared for a page of acl data. */
4547 if (npages == 0)
4548 npages = 1;
21f498c2
TM		 4549 if (npages > ARRAY_SIZE(pages))
4550 return -ERANGE;
5a006899 4551
bf118a34
AA		 4552 for (i = 0; i < npages; i++) {
4553 pages[i] = alloc_page(GFP_KERNEL);
4554 if (!pages[i])
4555 goto out_free;
e50a1c2e 4556 }
5a006899
SP		 4557
4558 /* for decoding across pages */
4559 res.acl_scratch = alloc_page(GFP_KERNEL);
4560 if (!res.acl_scratch)
4561 goto out_free;
4562
bf118a34
AA		 4563 args.acl_len = npages * PAGE_SIZE;
4564 args.acl_pgbase = 0;
5a006899 4565
de040bec 4566 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4567 __func__, buf, buflen, npages, args.acl_len);
4568 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4569 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4570 if (ret)
4571 goto out_free;
bf118a34 4572
1f1ea6c2
TM		 4573 /* Handle the case where the passed-in buffer is too short */
4574 if (res.acl_flags & NFS4_ACL_TRUNC) {
4575 /* Did the user only issue a request for the acl length? */
4576 if (buf == NULL)
4577 goto out_ok;
e50a1c2e 4578 ret = -ERANGE;
1f1ea6c2 4579 goto out_free;
e50a1c2e 4580 }
1f1ea6c2 4581 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4582 if (buf) {
4583 if (res.acl_len > buflen) {
4584 ret = -ERANGE;
4585 goto out_free;
4586 }
1f1ea6c2 4587 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4588 }
1f1ea6c2
TM		 4589out_ok:
4590 ret = res.acl_len;
e50a1c2e 4591out_free:
bf118a34
AA		 4592 for (i = 0; i < npages; i++)
4593 if (pages[i])
4594 __free_page(pages[i]);
331818f1
TM		 4595 if (res.acl_scratch)
4596 __free_page(res.acl_scratch);
aa1870af
BF		 4597 return ret;
4598}
4599
16b4289c
TM		 4600static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4601{
4602 struct nfs4_exception exception = { };
4603 ssize_t ret;
4604 do {
4605 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4606 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4607 if (ret >= 0)
4608 break;
4609 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4610 } while (exception.retry);
4611 return ret;
4612}
4613
e50a1c2e
BF		 4614static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4615{
4616 struct nfs_server *server = NFS_SERVER(inode);
4617 int ret;
4618
4619 if (!nfs4_server_supports_acls(server))
4620 return -EOPNOTSUPP;
4621 ret = nfs_revalidate_inode(server, inode);
4622 if (ret < 0)
4623 return ret;
08a22b39
AK		 4624 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4625 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4626 ret = nfs4_read_cached_acl(inode, buf, buflen);
4627 if (ret != -ENOENT)
bf118a34
AA		 4628 /* -ENOENT is returned if there is no ACL or if there is an ACL
4629 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4630 return ret;
4631 return nfs4_get_acl_uncached(inode, buf, buflen);
4632}
4633
16b4289c 4634static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4635{
4636 struct nfs_server *server = NFS_SERVER(inode);
4637 struct page *pages[NFS4ACL_MAXPAGES];
4638 struct nfs_setaclargs arg = {
4639 .fh = NFS_FH(inode),
4640 .acl_pages = pages,
4641 .acl_len = buflen,
4642 };
73c403a9 4643 struct nfs_setaclres res;
4b580ee3
BF		 4644 struct rpc_message msg = {
4645 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4646 .rpc_argp = &arg,
73c403a9 4647 .rpc_resp = &res,
4b580ee3 4648 };
21f498c2 4649 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4650 int ret, i;
4b580ee3
BF		 4651
4652 if (!nfs4_server_supports_acls(server))
4653 return -EOPNOTSUPP;
21f498c2
TM		 4654 if (npages > ARRAY_SIZE(pages))
4655 return -ERANGE;
e9e3d724
NH		 4656 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4657 if (i < 0)
4658 return i;
57ec14c5 4659 nfs4_inode_return_delegation(inode);
7c513058 4660 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4661
4662 /*
4663 * Free each page after tx, so the only ref left is
4664 * held by the network stack
4665 */
4666 for (; i > 0; i--)
4667 put_page(pages[i-1]);
4668
08a22b39
AK		 4669 /*
4670 * Acl update can result in inode attribute update.
4671 * so mark the attribute cache invalid.
4672 */
4673 spin_lock(&inode->i_lock);
4674 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4675 spin_unlock(&inode->i_lock);
f41f7418
TM		 4676 nfs_access_zap_cache(inode);
4677 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4678 return ret;
4679}
4680
16b4289c
TM		 4681static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4682{
4683 struct nfs4_exception exception = { };
4684 int err;
4685 do {
c1578b76
TM		 4686 err = __nfs4_proc_set_acl(inode, buf, buflen);
4687 trace_nfs4_set_acl(inode, err);
4688 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4689 &exception);
4690 } while (exception.retry);
4691 return err;
4692}
4693
aa9c2669
DQ		 4694#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4695static int _nfs4_get_security_label(struct inode *inode, void *buf,
4696 size_t buflen)
4697{
4698 struct nfs_server *server = NFS_SERVER(inode);
4699 struct nfs_fattr fattr;
4700 struct nfs4_label label = {0, 0, buflen, buf};
4701
4702 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4703 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4704 .fh = NFS_FH(inode),
4705 .bitmask = bitmask,
4706 };
4707 struct nfs4_getattr_res res = {
4708 .fattr = &fattr,
4709 .label = &label,
4710 .server = server,
4711 };
4712 struct rpc_message msg = {
4713 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4714 .rpc_argp = &arg,
aa9c2669
DQ		 4715 .rpc_resp = &res,
4716 };
4717 int ret;
4718
4719 nfs_fattr_init(&fattr);
4720
fcb63a9b 4721 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4722 if (ret)
4723 return ret;
4724 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4725 return -ENOENT;
4726 if (buflen < label.len)
4727 return -ERANGE;
4728 return 0;
4729}
4730
4731static int nfs4_get_security_label(struct inode *inode, void *buf,
4732 size_t buflen)
4733{
4734 struct nfs4_exception exception = { };
4735 int err;
4736
4737 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4738 return -EOPNOTSUPP;
4739
4740 do {
c1578b76
TM		 4741 err = _nfs4_get_security_label(inode, buf, buflen);
4742 trace_nfs4_get_security_label(inode, err);
4743 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4744 &exception);
4745 } while (exception.retry);
4746 return err;
4747}
4748
4749static int _nfs4_do_set_security_label(struct inode *inode,
4750 struct nfs4_label *ilabel,
4751 struct nfs_fattr *fattr,
4752 struct nfs4_label *olabel)
4753{
4754
4755 struct iattr sattr = {0};
4756 struct nfs_server *server = NFS_SERVER(inode);
4757 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4758 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4759 .fh = NFS_FH(inode),
4760 .iap = &sattr,
4761 .server = server,
4762 .bitmask = bitmask,
4763 .label = ilabel,
4764 };
4765 struct nfs_setattrres res = {
4766 .fattr = fattr,
4767 .label = olabel,
4768 .server = server,
4769 };
4770 struct rpc_message msg = {
4771 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4772 .rpc_argp = &arg,
aa9c2669
DQ		 4773 .rpc_resp = &res,
4774 };
4775 int status;
4776
12207f69 4777 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4778
12207f69 4779 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4780 if (status)
4781 dprintk("%s failed: %d\n", __func__, status);
4782
4783 return status;
4784}
4785
4786static int nfs4_do_set_security_label(struct inode *inode,
4787 struct nfs4_label *ilabel,
4788 struct nfs_fattr *fattr,
4789 struct nfs4_label *olabel)
4790{
4791 struct nfs4_exception exception = { };
4792 int err;
4793
4794 do {
c1578b76
TM		 4795 err = _nfs4_do_set_security_label(inode, ilabel,
4796 fattr, olabel);
4797 trace_nfs4_set_security_label(inode, err);
4798 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4799 &exception);
4800 } while (exception.retry);
4801 return err;
4802}
4803
4804static int
4805nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4806{
4807 struct nfs4_label ilabel, *olabel = NULL;
4808 struct nfs_fattr fattr;
4809 struct rpc_cred *cred;
4810 struct inode *inode = dentry->d_inode;
4811 int status;
4812
4813 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4814 return -EOPNOTSUPP;
4815
4816 nfs_fattr_init(&fattr);
4817
4818 ilabel.pi = 0;
4819 ilabel.lfs = 0;
4820 ilabel.label = (char *)buf;
4821 ilabel.len = buflen;
4822
4823 cred = rpc_lookup_cred();
4824 if (IS_ERR(cred))
4825 return PTR_ERR(cred);
4826
4827 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4828 if (IS_ERR(olabel)) {
4829 status = -PTR_ERR(olabel);
4830 goto out;
4831 }
4832
4833 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4834 if (status == 0)
4835 nfs_setsecurity(inode, &fattr, olabel);
4836
4837 nfs4_label_free(olabel);
4838out:
4839 put_rpccred(cred);
4840 return status;
4841}
4842#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4843
4844
1da177e4 4845static int
8478eaa1
N		 4846nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4847 struct nfs4_state *state, long *timeout)
1da177e4 4848{
aa5190d0
TM		 4849 struct nfs_client *clp = server->nfs_client;
4850
4851 if (task->tk_status >= 0)
1da177e4
LT		 4852 return 0;
4853 switch(task->tk_status) {
a1d0b5ee 4854 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4855 case -NFS4ERR_ADMIN_REVOKED:
4856 case -NFS4ERR_BAD_STATEID:
4857 case -NFS4ERR_OPENMODE:
4858 if (state == NULL)
4859 break;
5d422301 4860 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4861 goto recovery_failed;
0400a6b0 4862 goto wait_on_recovery;
0ced63d1 4863 case -NFS4ERR_EXPIRED:
5d422301
TM		 4864 if (state != NULL) {
4865 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4866 goto recovery_failed;
5d422301 4867 }
1da177e4 4868 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4869 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4870 nfs4_schedule_lease_recovery(clp);
4871 goto wait_on_recovery;
519ae255
CL		 4872 case -NFS4ERR_MOVED:
4873 if (nfs4_schedule_migration_recovery(server) < 0)
4874 goto recovery_failed;
4875 goto wait_on_recovery;
8ef2f8d4
CL		 4876 case -NFS4ERR_LEASE_MOVED:
4877 nfs4_schedule_lease_moved_recovery(clp);
4878 goto wait_on_recovery;
4745e315
AA		 4879#if defined(CONFIG_NFS_V4_1)
4880 case -NFS4ERR_BADSESSION:
4881 case -NFS4ERR_BADSLOT:
4882 case -NFS4ERR_BAD_HIGH_SLOT:
4883 case -NFS4ERR_DEADSESSION:
4884 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4885 case -NFS4ERR_SEQ_FALSE_RETRY:
4886 case -NFS4ERR_SEQ_MISORDERED:
4887 dprintk("%s ERROR %d, Reset session\n", __func__,
4888 task->tk_status);
9f594791 4889 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4890 goto wait_on_recovery;
4745e315 4891#endif /* CONFIG_NFS_V4_1 */
1da177e4 4892 case -NFS4ERR_DELAY:
aa5190d0 4893 nfs_inc_server_stats(server, NFSIOS_DELAY);
8478eaa1
N		 4894 rpc_delay(task, nfs4_update_delay(timeout));
4895 goto restart_call;
006ea73e 4896 case -NFS4ERR_GRACE:
1da177e4 4897 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4898 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4899 case -NFS4ERR_OLD_STATEID:
f1478c13 4900 goto restart_call;
1da177e4
LT		 4901 }
4902 task->tk_status = nfs4_map_errors(task->tk_status);
4903 return 0;
9f51a78e 4904recovery_failed:
5d422301
TM		 4905 task->tk_status = -EIO;
4906 return 0;
0400a6b0 4907wait_on_recovery:
a2c0b9e2 4908 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4909 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4910 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4911 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4912 goto recovery_failed;
f1478c13 4913restart_call:
a2c0b9e2
TM		 4914 task->tk_status = 0;
4915 return -EAGAIN;
1da177e4
LT		 4916}
4917
f092075d
CL		 4918static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4919 nfs4_verifier *bootverf)
cd93710e
CL		 4920{
4921 __be32 verf[2];
4922
2c820d9a
CL		 4923 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4924 /* An impossible timestamp guarantees this value
4925 * will never match a generated boot time. */
4926 verf[0] = 0;
17f26b12 4927 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4928 } else {
f092075d 4929 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4930 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4931 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4932 }
cd93710e
CL		 4933 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4934}
4935
e984a55a 4936static unsigned int
ceb3a16c 4937nfs4_init_nonuniform_client_string(struct nfs_client *clp,
e984a55a
CL		 4938 char *buf, size_t len)
4939{
4940 unsigned int result;
4941
ceb3a16c
TM		 4942 if (clp->cl_owner_id != NULL)
4943 return strlcpy(buf, clp->cl_owner_id, len);
4944
e984a55a
CL		 4945 rcu_read_lock();
4946 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4947 clp->cl_ipaddr,
4948 rpc_peeraddr2str(clp->cl_rpcclient,
4949 RPC_DISPLAY_ADDR),
4950 rpc_peeraddr2str(clp->cl_rpcclient,
4951 RPC_DISPLAY_PROTO));
4952 rcu_read_unlock();
ceb3a16c 4953 clp->cl_owner_id = kstrdup(buf, GFP_KERNEL);
e984a55a
CL		 4954 return result;
4955}
4956
4957static unsigned int
ceb3a16c 4958nfs4_init_uniform_client_string(struct nfs_client *clp,
e984a55a
CL		 4959 char *buf, size_t len)
4960{
55b59293 4961 const char *nodename = clp->cl_rpcclient->cl_nodename;
ceb3a16c
TM		 4962 unsigned int result;
4963
4964 if (clp->cl_owner_id != NULL)
4965 return strlcpy(buf, clp->cl_owner_id, len);
6f2ea7f2
CL		 4966
4967 if (nfs4_client_id_uniquifier[0] != '\0')
ceb3a16c 4968 result = scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
55b59293
TM		 4969 clp->rpc_ops->version,
4970 clp->cl_minorversion,
4971 nfs4_client_id_uniquifier,
4972 nodename);
ceb3a16c
TM		 4973 else
4974 result = scnprintf(buf, len, "Linux NFSv%u.%u %s",
e984a55a 4975 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4976 nodename);
ceb3a16c
TM		 4977 clp->cl_owner_id = kstrdup(buf, GFP_KERNEL);
4978 return result;
e984a55a
CL		 4979}
4980
706cb8db
CL		 4981/*
4982 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
4983 * services. Advertise one based on the address family of the
4984 * clientaddr.
4985 */
4986static unsigned int
4987nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
4988{
4989 if (strchr(clp->cl_ipaddr, ':') != NULL)
4990 return scnprintf(buf, len, "tcp6");
4991 else
4992 return scnprintf(buf, len, "tcp");
4993}
4994
f11b2a1c
JL		 4995static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
4996{
4997 struct nfs4_setclientid *sc = calldata;
4998
4999 if (task->tk_status == 0)
5000 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5001}
5002
5003static const struct rpc_call_ops nfs4_setclientid_ops = {
5004 .rpc_call_done = nfs4_setclientid_done,
5005};
5006
6bbb4ae8
CL		 5007/**
5008 * nfs4_proc_setclientid - Negotiate client ID
5009 * @clp: state data structure
5010 * @program: RPC program for NFSv4 callback service
5011 * @port: IP port number for NFS4 callback service
5012 * @cred: RPC credential to use for this call
5013 * @res: where to place the result
5014 *
5015 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5016 */
bb8b27e5
TM		 5017int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5018 unsigned short port, struct rpc_cred *cred,
5019 struct nfs4_setclientid_res *res)
1da177e4
LT		 5020{
5021 nfs4_verifier sc_verifier;
5022 struct nfs4_setclientid setclientid = {
5023 .sc_verifier = &sc_verifier,
5024 .sc_prog = program,
f4eecd5d 5025 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 5026 };
5027 struct rpc_message msg = {
5028 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5029 .rpc_argp = &setclientid,
bb8b27e5 5030 .rpc_resp = res,
286d7d6a 5031 .rpc_cred = cred,
1da177e4 5032 };
f11b2a1c
JL		 5033 struct rpc_task *task;
5034 struct rpc_task_setup task_setup_data = {
5035 .rpc_client = clp->cl_rpcclient,
5036 .rpc_message = &msg,
5037 .callback_ops = &nfs4_setclientid_ops,
5038 .callback_data = &setclientid,
5039 .flags = RPC_TASK_TIMEOUT,
5040 };
6bbb4ae8 5041 int status;
1da177e4 5042
de734831 5043 /* nfs_client_id4 */
f092075d 5044 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 5045 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5046 setclientid.sc_name_len =
5047 nfs4_init_uniform_client_string(clp,
5048 setclientid.sc_name,
5049 sizeof(setclientid.sc_name));
5050 else
5051 setclientid.sc_name_len =
5052 nfs4_init_nonuniform_client_string(clp,
5053 setclientid.sc_name,
5054 sizeof(setclientid.sc_name));
de734831 5055 /* cb_client4 */
706cb8db
CL		 5056 setclientid.sc_netid_len =
5057 nfs4_init_callback_netid(clp,
5058 setclientid.sc_netid,
5059 sizeof(setclientid.sc_netid));
de734831 5060 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5061 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5062 clp->cl_ipaddr, port >> 8, port & 255);
5063
6bbb4ae8
CL		 5064 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
5065 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5066 setclientid.sc_name_len, setclientid.sc_name);
f11b2a1c
JL		 5067 task = rpc_run_task(&task_setup_data);
5068 if (IS_ERR(task)) {
5069 status = PTR_ERR(task);
5070 goto out;
5071 }
5072 status = task->tk_status;
5073 if (setclientid.sc_cred) {
5074 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5075 put_rpccred(setclientid.sc_cred);
5076 }
5077 rpc_put_task(task);
5078out:
c6d01c6f 5079 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5080 dprintk("NFS reply setclientid: %d\n", status);
5081 return status;
1da177e4
LT		 5082}
5083
6bbb4ae8
CL		 5084/**
5085 * nfs4_proc_setclientid_confirm - Confirm client ID
5086 * @clp: state data structure
5087 * @res: result of a previous SETCLIENTID
5088 * @cred: RPC credential to use for this call
5089 *
5090 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5091 */
fd954ae1 5092int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5093 struct nfs4_setclientid_res *arg,
5094 struct rpc_cred *cred)
1da177e4 5095{
1da177e4
LT		 5096 struct rpc_message msg = {
5097 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5098 .rpc_argp = arg,
286d7d6a 5099 .rpc_cred = cred,
1da177e4 5100 };
1da177e4
LT		 5101 int status;
5102
6bbb4ae8
CL		 5103 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5104 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5105 clp->cl_clientid);
1bd714f2 5106 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5107 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5108 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5109 return status;
5110}
5111
fe650407
TM		 5112struct nfs4_delegreturndata {
5113 struct nfs4_delegreturnargs args;
fa178f29 5114 struct nfs4_delegreturnres res;
fe650407
TM		 5115 struct nfs_fh fh;
5116 nfs4_stateid stateid;
26e976a8 5117 unsigned long timestamp;
fa178f29 5118 struct nfs_fattr fattr;
fe650407 5119 int rpc_status;
039b756a
PT		 5120 struct inode *inode;
5121 bool roc;
5122 u32 roc_barrier;
fe650407
TM		 5123};
5124
fe650407
TM		 5125static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5126{
5127 struct nfs4_delegreturndata *data = calldata;
938e1010 5128
14516c3a
TM		 5129 if (!nfs4_sequence_done(task, &data->res.seq_res))
5130 return;
938e1010 5131
ca8acf8d 5132 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5133 switch (task->tk_status) {
79708861 5134 case 0:
fa178f29 5135 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5136 case -NFS4ERR_ADMIN_REVOKED:
5137 case -NFS4ERR_DELEG_REVOKED:
5138 case -NFS4ERR_BAD_STATEID:
5139 case -NFS4ERR_OLD_STATEID:
5140 case -NFS4ERR_STALE_STATEID:
5141 case -NFS4ERR_EXPIRED:
5142 task->tk_status = 0;
039b756a
PT		 5143 if (data->roc)
5144 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5145 break;
79708861 5146 default:
8478eaa1
N		 5147 if (nfs4_async_handle_error(task, data->res.server,
5148 NULL, NULL) == -EAGAIN) {
d00c5d43 5149 rpc_restart_call_prepare(task);
79708861
RL		 5150 return;
5151 }
5152 }
5153 data->rpc_status = task->tk_status;
fe650407
TM		 5154}
5155
5156static void nfs4_delegreturn_release(void *calldata)
5157{
039b756a
PT		 5158 struct nfs4_delegreturndata *data = calldata;
5159
5160 if (data->roc)
5161 pnfs_roc_release(data->inode);
fe650407
TM		 5162 kfree(calldata);
5163}
5164
938e1010
AA		 5165static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5166{
5167 struct nfs4_delegreturndata *d_data;
5168
5169 d_data = (struct nfs4_delegreturndata *)data;
5170
039b756a
PT		 5171 if (d_data->roc &&
5172 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5173 return;
5174
d9afbd1b
TM		 5175 nfs4_setup_sequence(d_data->res.server,
5176 &d_data->args.seq_args,
5177 &d_data->res.seq_res,
5178 task);
938e1010 5179}
938e1010 5180
c8d149f3 5181static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5182 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5183 .rpc_call_done = nfs4_delegreturn_done,
5184 .rpc_release = nfs4_delegreturn_release,
5185};
5186
e6f81075 5187static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5188{
5189 struct nfs4_delegreturndata *data;
fa178f29 5190 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5191 struct rpc_task *task;
5138fde0
TM		 5192 struct rpc_message msg = {
5193 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5194 .rpc_cred = cred,
5195 };
c970aa85
TM		 5196 struct rpc_task_setup task_setup_data = {
5197 .rpc_client = server->client,
5138fde0 5198 .rpc_message = &msg,
c970aa85
TM		 5199 .callback_ops = &nfs4_delegreturn_ops,
5200 .flags = RPC_TASK_ASYNC,
5201 };
e6f81075 5202 int status = 0;
fe650407 5203
8535b2be 5204 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5205 if (data == NULL)
5206 return -ENOMEM;
a9c92d6b 5207 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5208 data->args.fhandle = &data->fh;
5209 data->args.stateid = &data->stateid;
9e907fec 5210 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5211 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5212 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5213 data->res.fattr = &data->fattr;
5214 data->res.server = server;
5138fde0 5215 nfs_fattr_init(data->res.fattr);
26e976a8 5216 data->timestamp = jiffies;
fe650407 5217 data->rpc_status = 0;
039b756a
PT		 5218 data->inode = inode;
5219 data->roc = list_empty(&NFS_I(inode)->open_files) ?
5220 pnfs_roc(inode) : false;
fe650407 5221
c970aa85 5222 task_setup_data.callback_data = data;
1174dd1f
TM		 5223 msg.rpc_argp = &data->args;
5224 msg.rpc_resp = &data->res;
c970aa85 5225 task = rpc_run_task(&task_setup_data);
7a1218a2 5226 if (IS_ERR(task))
fe650407 5227 return PTR_ERR(task);
e6f81075
TM		 5228 if (!issync)
5229 goto out;
fe650407 5230 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5231 if (status != 0)
5232 goto out;
5233 status = data->rpc_status;
e144cbcc
TM		 5234 if (status == 0)
5235 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5236 else
5237 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5238out:
e6b3c4db 5239 rpc_put_task(task);
fe650407 5240 return status;
1da177e4
LT		 5241}
5242
e6f81075 5243int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5244{
5245 struct nfs_server *server = NFS_SERVER(inode);
5246 struct nfs4_exception exception = { };
5247 int err;
5248 do {
e6f81075 5249 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5250 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5251 switch (err) {
5252 case -NFS4ERR_STALE_STATEID:
5253 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5254 case 0:
5255 return 0;
5256 }
5257 err = nfs4_handle_exception(server, err, &exception);
5258 } while (exception.retry);
5259 return err;
5260}
5261
5262#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5263#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5264
5265/*
5266 * sleep, with exponential backoff, and retry the LOCK operation.
5267 */
5268static unsigned long
5269nfs4_set_lock_task_retry(unsigned long timeout)
5270{
416ad3c9 5271 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5272 timeout <<= 1;
5273 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5274 return NFS4_LOCK_MAXTIMEOUT;
5275 return timeout;
5276}
5277
1da177e4
LT		 5278static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5279{
5280 struct inode *inode = state->inode;
5281 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5282 struct nfs_client *clp = server->nfs_client;
911d1aaf 5283 struct nfs_lockt_args arg = {
1da177e4 5284 .fh = NFS_FH(inode),
911d1aaf 5285 .fl = request,
1da177e4 5286 };
911d1aaf
TM		 5287 struct nfs_lockt_res res = {
5288 .denied = request,
1da177e4
LT		 5289 };
5290 struct rpc_message msg = {
5291 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5292 .rpc_argp = &arg,
5293 .rpc_resp = &res,
5294 .rpc_cred = state->owner->so_cred,
5295 };
1da177e4
LT		 5296 struct nfs4_lock_state *lsp;
5297 int status;
5298
911d1aaf 5299 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5300 status = nfs4_set_lock_state(state, request);
5301 if (status != 0)
5302 goto out;
5303 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5304 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5305 arg.lock_owner.s_dev = server->s_dev;
7c513058 5306 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5307 switch (status) {
5308 case 0:
5309 request->fl_type = F_UNLCK;
5310 break;
5311 case -NFS4ERR_DENIED:
5312 status = 0;
1da177e4 5313 }
70cc6487 5314 request->fl_ops->fl_release_private(request);
a6f951dd 5315 request->fl_ops = NULL;
8d0a8a9d 5316out:
1da177e4
LT		 5317 return status;
5318}
5319
5320static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5321{
5322 struct nfs4_exception exception = { };
5323 int err;
5324
5325 do {
d1b748a5
TM		 5326 err = _nfs4_proc_getlk(state, cmd, request);
5327 trace_nfs4_get_lock(request, state, cmd, err);
5328 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5329 &exception);
5330 } while (exception.retry);
5331 return err;
5332}
5333
5334static int do_vfs_lock(struct file *file, struct file_lock *fl)
5335{
5336 int res = 0;
5337 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5338 case FL_POSIX:
5339 res = posix_lock_file_wait(file, fl);
5340 break;
5341 case FL_FLOCK:
5342 res = flock_lock_file_wait(file, fl);
5343 break;
5344 default:
5345 BUG();
5346 }
1da177e4
LT		 5347 return res;
5348}
5349
faf5f49c 5350struct nfs4_unlockdata {
911d1aaf
TM		 5351 struct nfs_locku_args arg;
5352 struct nfs_locku_res res;
faf5f49c
TM		 5353 struct nfs4_lock_state *lsp;
5354 struct nfs_open_context *ctx;
911d1aaf
TM		 5355 struct file_lock fl;
5356 const struct nfs_server *server;
26e976a8 5357 unsigned long timestamp;
faf5f49c
TM		 5358};
5359
911d1aaf
TM		 5360static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5361 struct nfs_open_context *ctx,
5362 struct nfs4_lock_state *lsp,
5363 struct nfs_seqid *seqid)
5364{
5365 struct nfs4_unlockdata *p;
5366 struct inode *inode = lsp->ls_state->inode;
5367
8535b2be 5368 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5369 if (p == NULL)
5370 return NULL;
5371 p->arg.fh = NFS_FH(inode);
5372 p->arg.fl = &p->fl;
5373 p->arg.seqid = seqid;
c1d51931 5374 p->res.seqid = seqid;
911d1aaf
TM		 5375 p->arg.stateid = &lsp->ls_stateid;
5376 p->lsp = lsp;
5377 atomic_inc(&lsp->ls_count);
5378 /* Ensure we don't close file until we're done freeing locks! */
5379 p->ctx = get_nfs_open_context(ctx);
5380 memcpy(&p->fl, fl, sizeof(p->fl));
5381 p->server = NFS_SERVER(inode);
5382 return p;
5383}
5384
06f814a3 5385static void nfs4_locku_release_calldata(void *data)
faf5f49c 5386{
963d8fe5 5387 struct nfs4_unlockdata *calldata = data;
911d1aaf 5388 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5389 nfs4_put_lock_state(calldata->lsp);
5390 put_nfs_open_context(calldata->ctx);
5391 kfree(calldata);
faf5f49c
TM		 5392}
5393
963d8fe5 5394static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5395{
963d8fe5 5396 struct nfs4_unlockdata *calldata = data;
faf5f49c 5397
14516c3a
TM		 5398 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5399 return;
faf5f49c
TM		 5400 switch (task->tk_status) {
5401 case 0:
f597c537
TM		 5402 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5403 &calldata->res.stateid);
26e976a8 5404 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5405 break;
9e33bed5
TM		 5406 case -NFS4ERR_BAD_STATEID:
5407 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5408 case -NFS4ERR_STALE_STATEID:
5409 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5410 break;
5411 default:
8478eaa1
N		 5412 if (nfs4_async_handle_error(task, calldata->server,
5413 NULL, NULL) == -EAGAIN)
d00c5d43 5414 rpc_restart_call_prepare(task);
faf5f49c 5415 }
2b1bc308 5416 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5417}
5418
4ce70ada 5419static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5420{
4ce70ada 5421 struct nfs4_unlockdata *calldata = data;
faf5f49c 5422
911d1aaf 5423 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5424 goto out_wait;
795a88c9 5425 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5426 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5427 goto out_no_action;
faf5f49c 5428 }
26e976a8 5429 calldata->timestamp = jiffies;
035168ab 5430 if (nfs4_setup_sequence(calldata->server,
a893693c 5431 &calldata->arg.seq_args,
2240a9e2
TM		 5432 &calldata->res.seq_res,
5433 task) != 0)
5434 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5435 return;
5436out_no_action:
5437 task->tk_action = NULL;
5438out_wait:
5439 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5440}
5441
963d8fe5 5442static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5443 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5444 .rpc_call_done = nfs4_locku_done,
06f814a3 5445 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5446};
5447
a5d16a4d
TM		 5448static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5449 struct nfs_open_context *ctx,
5450 struct nfs4_lock_state *lsp,
5451 struct nfs_seqid *seqid)
5452{
5453 struct nfs4_unlockdata *data;
5138fde0
TM		 5454 struct rpc_message msg = {
5455 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5456 .rpc_cred = ctx->cred,
5457 };
c970aa85
TM		 5458 struct rpc_task_setup task_setup_data = {
5459 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5460 .rpc_message = &msg,
c970aa85 5461 .callback_ops = &nfs4_locku_ops,
101070ca 5462 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5463 .flags = RPC_TASK_ASYNC,
5464 };
a5d16a4d 5465
fa940720
WAA		 5466 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5467 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5468
137d6aca
FF		 5469 /* Ensure this is an unlock - when canceling a lock, the
5470 * canceled lock is passed in, and it won't be an unlock.
5471 */
5472 fl->fl_type = F_UNLCK;
5473
a5d16a4d
TM		 5474 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5475 if (data == NULL) {
5476 nfs_free_seqid(seqid);
5477 return ERR_PTR(-ENOMEM);
5478 }
5479
a9c92d6b 5480 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5481 msg.rpc_argp = &data->arg;
5482 msg.rpc_resp = &data->res;
c970aa85
TM		 5483 task_setup_data.callback_data = data;
5484 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5485}
5486
faf5f49c
TM		 5487static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5488{
65b62a29
TM		 5489 struct inode *inode = state->inode;
5490 struct nfs4_state_owner *sp = state->owner;
5491 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5492 struct nfs_seqid *seqid;
1da177e4 5493 struct nfs4_lock_state *lsp;
06f814a3
TM		 5494 struct rpc_task *task;
5495 int status = 0;
536ff0f8 5496 unsigned char fl_flags = request->fl_flags;
faf5f49c 5497
8d0a8a9d 5498 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5499 /* Unlock _before_ we do the RPC call */
5500 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5501 /* Exclude nfs_delegation_claim_locks() */
5502 mutex_lock(&sp->so_delegreturn_mutex);
5503 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5504 down_read(&nfsi->rwsem);
5505 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5506 up_read(&nfsi->rwsem);
65b62a29 5507 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5508 goto out;
19e03c57
TM		 5509 }
5510 up_read(&nfsi->rwsem);
65b62a29 5511 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5512 if (status != 0)
9b073574
TM		 5513 goto out;
5514 /* Is this a delegated lock? */
8d0a8a9d 5515 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5516 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5517 goto out;
8535b2be 5518 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5519 status = -ENOMEM;
911d1aaf 5520 if (seqid == NULL)
9b073574 5521 goto out;
cd3758e3 5522 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5523 status = PTR_ERR(task);
5524 if (IS_ERR(task))
9b073574 5525 goto out;
a5d16a4d 5526 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5527 rpc_put_task(task);
9b073574 5528out:
536ff0f8 5529 request->fl_flags = fl_flags;
d1b748a5 5530 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5531 return status;
5532}
5533
a5d16a4d
TM		 5534struct nfs4_lockdata {
5535 struct nfs_lock_args arg;
5536 struct nfs_lock_res res;
5537 struct nfs4_lock_state *lsp;
5538 struct nfs_open_context *ctx;
5539 struct file_lock fl;
26e976a8 5540 unsigned long timestamp;
a5d16a4d
TM		 5541 int rpc_status;
5542 int cancelled;
66179efe 5543 struct nfs_server *server;
a5d16a4d
TM		 5544};
5545
5546static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5547 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5548 gfp_t gfp_mask)
1da177e4 5549{
a5d16a4d
TM		 5550 struct nfs4_lockdata *p;
5551 struct inode *inode = lsp->ls_state->inode;
1da177e4 5552 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5553
8535b2be 5554 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5555 if (p == NULL)
5556 return NULL;
5557
5558 p->arg.fh = NFS_FH(inode);
5559 p->arg.fl = &p->fl;
8535b2be 5560 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5561 if (p->arg.open_seqid == NULL)
5562 goto out_free;
8535b2be 5563 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5564 if (p->arg.lock_seqid == NULL)
2f74c0a0 5565 goto out_free_seqid;
a5d16a4d 5566 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5567 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5568 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5569 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5570 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5571 p->lsp = lsp;
66179efe 5572 p->server = server;
a5d16a4d
TM		 5573 atomic_inc(&lsp->ls_count);
5574 p->ctx = get_nfs_open_context(ctx);
5575 memcpy(&p->fl, fl, sizeof(p->fl));
5576 return p;
2f74c0a0
TM		 5577out_free_seqid:
5578 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5579out_free:
5580 kfree(p);
5581 return NULL;
5582}
5583
5584static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5585{
5586 struct nfs4_lockdata *data = calldata;
5587 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5588
3110ff80 5589 dprintk("%s: begin!\n", __func__);
2f74c0a0 5590 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5591 goto out_wait;
a5d16a4d
TM		 5592 /* Do we need to do an open_to_lock_owner? */
5593 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5594 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5595 goto out_release_lock_seqid;
8fe72bac 5596 }
8e472f33 5597 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5598 data->arg.new_lock_owner = 1;
c1d51931 5599 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5600 } else
5601 data->arg.new_lock_owner = 0;
5d422301
TM		 5602 if (!nfs4_valid_open_stateid(state)) {
5603 data->rpc_status = -EBADF;
5604 task->tk_action = NULL;
5605 goto out_release_open_seqid;
5606 }
26e976a8 5607 data->timestamp = jiffies;
035168ab
TM		 5608 if (nfs4_setup_sequence(data->server,
5609 &data->arg.seq_args,
2240a9e2 5610 &data->res.seq_res,
d9afbd1b 5611 task) == 0)
66179efe 5612 return;
5d422301 5613out_release_open_seqid:
2240a9e2
TM		 5614 nfs_release_seqid(data->arg.open_seqid);
5615out_release_lock_seqid:
5616 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5617out_wait:
5618 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5619 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5620}
5621
a5d16a4d
TM		 5622static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5623{
5624 struct nfs4_lockdata *data = calldata;
5625
3110ff80 5626 dprintk("%s: begin!\n", __func__);
a5d16a4d 5627
14516c3a
TM		 5628 if (!nfs4_sequence_done(task, &data->res.seq_res))
5629 return;
66179efe 5630
a5d16a4d 5631 data->rpc_status = task->tk_status;
a5d16a4d 5632 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5633 if (data->rpc_status == 0)
5634 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5635 else
5636 goto out;
5637 }
5638 if (data->rpc_status == 0) {
f597c537 5639 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5640 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5641 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5642 }
a5d16a4d 5643out:
3110ff80 5644 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5645}
5646
5647static void nfs4_lock_release(void *calldata)
5648{
5649 struct nfs4_lockdata *data = calldata;
5650
3110ff80 5651 dprintk("%s: begin!\n", __func__);
2f74c0a0 5652 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5653 if (data->cancelled != 0) {
5654 struct rpc_task *task;
5655 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5656 data->arg.lock_seqid);
5657 if (!IS_ERR(task))
bf294b41 5658 rpc_put_task_async(task);
3110ff80 5659 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5660 } else
5661 nfs_free_seqid(data->arg.lock_seqid);
5662 nfs4_put_lock_state(data->lsp);
5663 put_nfs_open_context(data->ctx);
5664 kfree(data);
3110ff80 5665 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5666}
5667
5668static const struct rpc_call_ops nfs4_lock_ops = {
5669 .rpc_call_prepare = nfs4_lock_prepare,
5670 .rpc_call_done = nfs4_lock_done,
5671 .rpc_release = nfs4_lock_release,
5672};
5673
2bee72a6
TM		 5674static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5675{
2bee72a6
TM		 5676 switch (error) {
5677 case -NFS4ERR_ADMIN_REVOKED:
5678 case -NFS4ERR_BAD_STATEID:
ecac799a 5679 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5680 if (new_lock_owner != 0 ||
795a88c9 5681 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5682 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5683 break;
5684 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5685 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5686 case -NFS4ERR_EXPIRED:
5687 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5688 };
5689}
5690
afe6c27c 5691static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5692{
5693 struct nfs4_lockdata *data;
5694 struct rpc_task *task;
5138fde0
TM		 5695 struct rpc_message msg = {
5696 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5697 .rpc_cred = state->owner->so_cred,
5698 };
c970aa85
TM		 5699 struct rpc_task_setup task_setup_data = {
5700 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5701 .rpc_message = &msg,
c970aa85 5702 .callback_ops = &nfs4_lock_ops,
101070ca 5703 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5704 .flags = RPC_TASK_ASYNC,
5705 };
a5d16a4d
TM		 5706 int ret;
5707
3110ff80 5708 dprintk("%s: begin!\n", __func__);
cd3758e3 5709 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5710 fl->fl_u.nfs4_fl.owner,
5711 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5712 if (data == NULL)
5713 return -ENOMEM;
5714 if (IS_SETLKW(cmd))
5715 data->arg.block = 1;
a9c92d6b 5716 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5717 msg.rpc_argp = &data->arg;
5718 msg.rpc_resp = &data->res;
c970aa85 5719 task_setup_data.callback_data = data;
8fe72bac
TM		 5720 if (recovery_type > NFS_LOCK_NEW) {
5721 if (recovery_type == NFS_LOCK_RECLAIM)
5722 data->arg.reclaim = NFS_LOCK_RECLAIM;
5723 nfs4_set_sequence_privileged(&data->arg.seq_args);
5724 }
c970aa85 5725 task = rpc_run_task(&task_setup_data);
7a1218a2 5726 if (IS_ERR(task))
a5d16a4d 5727 return PTR_ERR(task);
a5d16a4d
TM		 5728 ret = nfs4_wait_for_completion_rpc_task(task);
5729 if (ret == 0) {
5730 ret = data->rpc_status;
2bee72a6
TM		 5731 if (ret)
5732 nfs4_handle_setlk_error(data->server, data->lsp,
5733 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5734 } else
5735 data->cancelled = 1;
e6b3c4db 5736 rpc_put_task(task);
3110ff80 5737 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5738 return ret;
1da177e4
LT		 5739}
5740
5741static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5742{
202b50dc 5743 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5744 struct nfs4_exception exception = {
5745 .inode = state->inode,
5746 };
202b50dc
TM		 5747 int err;
5748
5749 do {
42a2d13e
TM		 5750 /* Cache the lock if possible... */
5751 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5752 return 0;
afe6c27c 5753 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5754 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5755 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5756 break;
5757 nfs4_handle_exception(server, err, &exception);
5758 } while (exception.retry);
5759 return err;
1da177e4
LT		 5760}
5761
5762static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5763{
202b50dc 5764 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5765 struct nfs4_exception exception = {
5766 .inode = state->inode,
5767 };
202b50dc
TM		 5768 int err;
5769
6bfc93ef
TM		 5770 err = nfs4_set_lock_state(state, request);
5771 if (err != 0)
5772 return err;
f6de7a39 5773 if (!recover_lost_locks) {
ef1820f9
N		 5774 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5775 return 0;
5776 }
202b50dc 5777 do {
42a2d13e
TM		 5778 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5779 return 0;
afe6c27c 5780 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5781 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5782 switch (err) {
5783 default:
5784 goto out;
5785 case -NFS4ERR_GRACE:
5786 case -NFS4ERR_DELAY:
5787 nfs4_handle_exception(server, err, &exception);
5788 err = 0;
5789 }
202b50dc 5790 } while (exception.retry);
a9ed2e25 5791out:
202b50dc 5792 return err;
1da177e4
LT		 5793}
5794
f062eb6c 5795#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5796/**
5797 * nfs41_check_expired_locks - possibly free a lock stateid
5798 *
5799 * @state: NFSv4 state for an inode
5800 *
5801 * Returns NFS_OK if recovery for this stateid is now finished.
5802 * Otherwise a negative NFS4ERR value is returned.
5803 */
b01dd1d8 5804static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5805{
eb64cf96 5806 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5807 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5808 struct nfs_server *server = NFS_SERVER(state->inode);
5809
b01dd1d8 5810 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5811 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5812 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5813
5814 status = nfs41_test_stateid(server,
5815 &lsp->ls_stateid,
5816 cred);
08cb47fa 5817 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5818 if (status != NFS_OK) {
3e60ffdd
CL		 5819 /* Free the stateid unless the server
5820 * informs us the stateid is unrecognized. */
89af2739
CL		 5821 if (status != -NFS4ERR_BAD_STATEID)
5822 nfs41_free_stateid(server,
ab7cb0df
TM		 5823 &lsp->ls_stateid,
5824 cred);
795a88c9 5825 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5826 ret = status;
5827 }
5828 }
5829 };
5830
5831 return ret;
5832}
5833
5834static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5835{
5836 int status = NFS_OK;
5837
5838 if (test_bit(LK_STATE_IN_USE, &state->flags))
5839 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5840 if (status != NFS_OK)
5841 status = nfs4_lock_expired(state, request);
5842 return status;
f062eb6c
BS		 5843}
5844#endif
5845
1da177e4
LT		 5846static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5847{
9a99af49 5848 struct nfs4_state_owner *sp = state->owner;
19e03c57 5849 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5850 unsigned char fl_flags = request->fl_flags;
9a99af49 5851 unsigned int seq;
8e469ebd 5852 int status = -ENOLCK;
1da177e4 5853
8e469ebd
TM		 5854 if ((fl_flags & FL_POSIX) &&
5855 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5856 goto out;
6bfc93ef 5857 /* Is this a delegated open? */
6bfc93ef
TM		 5858 status = nfs4_set_lock_state(state, request);
5859 if (status != 0)
5860 goto out;
01c3b861
TM		 5861 request->fl_flags |= FL_ACCESS;
5862 status = do_vfs_lock(request->fl_file, request);
5863 if (status < 0)
5864 goto out;
19e03c57 5865 down_read(&nfsi->rwsem);
01c3b861 5866 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5867 /* Yes: cache locks! */
01c3b861 5868 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5869 request->fl_flags = fl_flags & ~FL_SLEEP;
5870 status = do_vfs_lock(request->fl_file, request);
5871 goto out_unlock;
01c3b861 5872 }
9a99af49
TM		 5873 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5874 up_read(&nfsi->rwsem);
afe6c27c 5875 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5876 if (status != 0)
9a99af49
TM		 5877 goto out;
5878 down_read(&nfsi->rwsem);
5879 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5880 status = -NFS4ERR_DELAY;
01c3b861 5881 goto out_unlock;
9a99af49 5882 }
6bfc93ef 5883 /* Note: we always want to sleep here! */
01c3b861 5884 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5885 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5886 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5887 "manager!\n", __func__);
01c3b861 5888out_unlock:
19e03c57 5889 up_read(&nfsi->rwsem);
01c3b861
TM		 5890out:
5891 request->fl_flags = fl_flags;
1da177e4
LT		 5892 return status;
5893}
5894
5895static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5896{
a1d0b5ee
TM		 5897 struct nfs4_exception exception = {
5898 .state = state,
05ffe24f 5899 .inode = state->inode,
a1d0b5ee 5900 };
1da177e4
LT		 5901 int err;
5902
5903 do {
965b5d67 5904 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5905 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5906 if (err == -NFS4ERR_DENIED)
5907 err = -EAGAIN;
1da177e4 5908 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5909 err, &exception);
1da177e4
LT		 5910 } while (exception.retry);
5911 return err;
5912}
5913
5914static int
5915nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5916{
5917 struct nfs_open_context *ctx;
5918 struct nfs4_state *state;
5919 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5920 int status;
5921
5922 /* verify open state */
cd3758e3 5923 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5924 state = ctx->state;
5925
5926 if (request->fl_start < 0 || request->fl_end < 0)
5927 return -EINVAL;
5928
d953126a
TM		 5929 if (IS_GETLK(cmd)) {
5930 if (state != NULL)
5931 return nfs4_proc_getlk(state, F_GETLK, request);
5932 return 0;
5933 }
1da177e4
LT		 5934
5935 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5936 return -EINVAL;
5937
d953126a
TM		 5938 if (request->fl_type == F_UNLCK) {
5939 if (state != NULL)
5940 return nfs4_proc_unlck(state, cmd, request);
5941 return 0;
5942 }
1da177e4 5943
d953126a
TM		 5944 if (state == NULL)
5945 return -ENOLCK;
55725513
TM		 5946 /*
5947 * Don't rely on the VFS having checked the file open mode,
5948 * since it won't do this for flock() locks.
5949 */
f44106e2 5950 switch (request->fl_type) {
55725513
TM		 5951 case F_RDLCK:
5952 if (!(filp->f_mode & FMODE_READ))
5953 return -EBADF;
5954 break;
5955 case F_WRLCK:
5956 if (!(filp->f_mode & FMODE_WRITE))
5957 return -EBADF;
5958 }
5959
1da177e4
LT		 5960 do {
5961 status = nfs4_proc_setlk(state, cmd, request);
5962 if ((status != -EAGAIN) || IS_SETLK(cmd))
5963 break;
5964 timeout = nfs4_set_lock_task_retry(timeout);
5965 status = -ERESTARTSYS;
5966 if (signalled())
5967 break;
5968 } while(status < 0);
1da177e4
LT		 5969 return status;
5970}
5971
db4f2e63 5972int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5973{
5974 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5975 int err;
5976
5977 err = nfs4_set_lock_state(state, fl);
5978 if (err != 0)
db4f2e63 5979 return err;
4a706fa0 5980 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5981 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5982}
6b3b5496 5983
cf470c3e
TM		 5984struct nfs_release_lockowner_data {
5985 struct nfs4_lock_state *lsp;
5ae67c4f 5986 struct nfs_server *server;
cf470c3e 5987 struct nfs_release_lockowner_args args;
b7e63a10 5988 struct nfs_release_lockowner_res res;
60ea6812 5989 unsigned long timestamp;
cf470c3e
TM		 5990};
5991
fbd4bfd1
CL		 5992static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5993{
5994 struct nfs_release_lockowner_data *data = calldata;
5b53dc88
KM		 5995 struct nfs_server *server = data->server;
5996 nfs40_setup_sequence(server, &data->args.seq_args,
5997 &data->res.seq_res, task);
5998 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 5999 data->timestamp = jiffies;
fbd4bfd1
CL		 6000}
6001
6002static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6003{
6004 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6005 struct nfs_server *server = data->server;
6006
b7e63a10 6007 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6008
6009 switch (task->tk_status) {
6010 case 0:
6011 renew_lease(server, data->timestamp);
6012 break;
6013 case -NFS4ERR_STALE_CLIENTID:
6014 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6015 nfs4_schedule_lease_recovery(server->nfs_client);
6016 break;
60ea6812
CL		 6017 case -NFS4ERR_LEASE_MOVED:
6018 case -NFS4ERR_DELAY:
8478eaa1
N		 6019 if (nfs4_async_handle_error(task, server,
6020 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6021 rpc_restart_call_prepare(task);
6022 }
fbd4bfd1
CL		 6023}
6024
d3c7b7cc
TM		 6025static void nfs4_release_lockowner_release(void *calldata)
6026{
cf470c3e 6027 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6028 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6029 kfree(calldata);
6030}
6031
17280175 6032static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6033 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6034 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6035 .rpc_release = nfs4_release_lockowner_release,
6036};
6037
f1cdae87
JL		 6038static void
6039nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6040{
cf470c3e 6041 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6042 struct rpc_message msg = {
6043 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6044 };
6045
6046 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6047 return;
fbd4bfd1 6048
cf470c3e
TM		 6049 data = kmalloc(sizeof(*data), GFP_NOFS);
6050 if (!data)
f1cdae87 6051 return;
cf470c3e 6052 data->lsp = lsp;
5ae67c4f 6053 data->server = server;
cf470c3e
TM		 6054 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6055 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6056 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6057
cf470c3e 6058 msg.rpc_argp = &data->args;
b7e63a10
TM		 6059 msg.rpc_resp = &data->res;
6060 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6061 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6062}
6063
aa1870af
BF		 6064#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6065
64c2ce8b
AK		 6066static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6067 const void *buf, size_t buflen,
6068 int flags, int type)
6b3b5496 6069{
64c2ce8b
AK		 6070 if (strcmp(key, "") != 0)
6071 return -EINVAL;
4b580ee3 6072
64c2ce8b 6073 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6074}
6075
64c2ce8b
AK		 6076static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6077 void *buf, size_t buflen, int type)
6b3b5496 6078{
64c2ce8b
AK		 6079 if (strcmp(key, "") != 0)
6080 return -EINVAL;
aa1870af 6081
64c2ce8b 6082 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6083}
6084
64c2ce8b
AK		 6085static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6086 size_t list_len, const char *name,
6087 size_t name_len, int type)
6b3b5496 6088{
64c2ce8b 6089 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6090
096455a2
BF		 6091 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
6092 return 0;
64c2ce8b
AK		 6093
6094 if (list && len <= list_len)
6095 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6096 return len;
6b3b5496
BF		 6097}
6098
c9bccef6
DQ		 6099#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6100static inline int nfs4_server_supports_labels(struct nfs_server *server)
6101{
6102 return server->caps & NFS_CAP_SECURITY_LABEL;
6103}
6104
6105static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6106 const void *buf, size_t buflen,
6107 int flags, int type)
6108{
6109 if (security_ismaclabel(key))
6110 return nfs4_set_security_label(dentry, buf, buflen);
6111
6112 return -EOPNOTSUPP;
6113}
6114
6115static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6116 void *buf, size_t buflen, int type)
6117{
6118 if (security_ismaclabel(key))
6119 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
6120 return -EOPNOTSUPP;
6121}
6122
6123static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6124 size_t list_len, const char *name,
6125 size_t name_len, int type)
6126{
6127 size_t len = 0;
6128
6129 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
6130 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
6131 if (list && len <= list_len)
6132 security_inode_listsecurity(dentry->d_inode, list, len);
6133 }
6134 return len;
6135}
6136
6137static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6138 .prefix = XATTR_SECURITY_PREFIX,
6139 .list = nfs4_xattr_list_nfs4_label,
6140 .get = nfs4_xattr_get_nfs4_label,
6141 .set = nfs4_xattr_set_nfs4_label,
6142};
6143#endif
6144
6145
533eb461
AA		 6146/*
6147 * nfs_fhget will use either the mounted_on_fileid or the fileid
6148 */
69aaaae1
TM		 6149static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6150{
533eb461
AA		 6151 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6152 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6153 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6154 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6155 return;
6156
6157 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6158 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6159 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6160 fattr->nlink = 2;
6161}
6162
f05d147f
BS		 6163static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6164 const struct qstr *name,
6165 struct nfs4_fs_locations *fs_locations,
6166 struct page *page)
683b57b4
TM		 6167{
6168 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6169 u32 bitmask[3] = {
361e624f 6170 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6171 };
6172 struct nfs4_fs_locations_arg args = {
6173 .dir_fh = NFS_FH(dir),
c228fd3a 6174 .name = name,
683b57b4
TM		 6175 .page = page,
6176 .bitmask = bitmask,
6177 };
22958463
BH		 6178 struct nfs4_fs_locations_res res = {
6179 .fs_locations = fs_locations,
6180 };
683b57b4
TM		 6181 struct rpc_message msg = {
6182 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6183 .rpc_argp = &args,
22958463 6184 .rpc_resp = &res,
683b57b4
TM		 6185 };
6186 int status;
6187
3110ff80 6188 dprintk("%s: start\n", __func__);
533eb461
AA		 6189
6190 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6191 * is not supported */
6192 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6193 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6194 else
6195 bitmask[0] |= FATTR4_WORD0_FILEID;
6196
c228fd3a 6197 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6198 fs_locations->server = server;
830b8e33 6199 fs_locations->nlocations = 0;
f05d147f 6200 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6201 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6202 return status;
6203}
6204
f05d147f
BS		 6205int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6206 const struct qstr *name,
6207 struct nfs4_fs_locations *fs_locations,
6208 struct page *page)
db0a9593
BS		 6209{
6210 struct nfs4_exception exception = { };
6211 int err;
6212 do {
078ea3df
TM		 6213 err = _nfs4_proc_fs_locations(client, dir, name,
6214 fs_locations, page);
6215 trace_nfs4_get_fs_locations(dir, name, err);
6216 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6217 &exception);
6218 } while (exception.retry);
6219 return err;
6220}
6221
b03d735b
CL		 6222/*
6223 * This operation also signals the server that this client is
6224 * performing migration recovery. The server can stop returning
6225 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6226 * appended to this compound to identify the client ID which is
6227 * performing recovery.
6228 */
6229static int _nfs40_proc_get_locations(struct inode *inode,
6230 struct nfs4_fs_locations *locations,
6231 struct page *page, struct rpc_cred *cred)
6232{
6233 struct nfs_server *server = NFS_SERVER(inode);
6234 struct rpc_clnt *clnt = server->client;
6235 u32 bitmask[2] = {
6236 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6237 };
6238 struct nfs4_fs_locations_arg args = {
6239 .clientid = server->nfs_client->cl_clientid,
6240 .fh = NFS_FH(inode),
6241 .page = page,
6242 .bitmask = bitmask,
6243 .migration = 1, /* skip LOOKUP */
6244 .renew = 1, /* append RENEW */
6245 };
6246 struct nfs4_fs_locations_res res = {
6247 .fs_locations = locations,
6248 .migration = 1,
6249 .renew = 1,
6250 };
6251 struct rpc_message msg = {
6252 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6253 .rpc_argp = &args,
6254 .rpc_resp = &res,
6255 .rpc_cred = cred,
6256 };
6257 unsigned long now = jiffies;
6258 int status;
6259
6260 nfs_fattr_init(&locations->fattr);
6261 locations->server = server;
6262 locations->nlocations = 0;
6263
6264 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6265 nfs4_set_sequence_privileged(&args.seq_args);
6266 status = nfs4_call_sync_sequence(clnt, server, &msg,
6267 &args.seq_args, &res.seq_res);
6268 if (status)
6269 return status;
6270
6271 renew_lease(server, now);
6272 return 0;
6273}
6274
6275#ifdef CONFIG_NFS_V4_1
6276
6277/*
6278 * This operation also signals the server that this client is
6279 * performing migration recovery. The server can stop asserting
6280 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6281 * performing this operation is identified in the SEQUENCE
6282 * operation in this compound.
6283 *
6284 * When the client supports GETATTR(fs_locations_info), it can
6285 * be plumbed in here.
6286 */
6287static int _nfs41_proc_get_locations(struct inode *inode,
6288 struct nfs4_fs_locations *locations,
6289 struct page *page, struct rpc_cred *cred)
6290{
6291 struct nfs_server *server = NFS_SERVER(inode);
6292 struct rpc_clnt *clnt = server->client;
6293 u32 bitmask[2] = {
6294 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6295 };
6296 struct nfs4_fs_locations_arg args = {
6297 .fh = NFS_FH(inode),
6298 .page = page,
6299 .bitmask = bitmask,
6300 .migration = 1, /* skip LOOKUP */
6301 };
6302 struct nfs4_fs_locations_res res = {
6303 .fs_locations = locations,
6304 .migration = 1,
6305 };
6306 struct rpc_message msg = {
6307 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6308 .rpc_argp = &args,
6309 .rpc_resp = &res,
6310 .rpc_cred = cred,
6311 };
6312 int status;
6313
6314 nfs_fattr_init(&locations->fattr);
6315 locations->server = server;
6316 locations->nlocations = 0;
6317
6318 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6319 nfs4_set_sequence_privileged(&args.seq_args);
6320 status = nfs4_call_sync_sequence(clnt, server, &msg,
6321 &args.seq_args, &res.seq_res);
6322 if (status == NFS4_OK &&
6323 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6324 status = -NFS4ERR_LEASE_MOVED;
6325 return status;
6326}
6327
6328#endif /* CONFIG_NFS_V4_1 */
6329
6330/**
6331 * nfs4_proc_get_locations - discover locations for a migrated FSID
6332 * @inode: inode on FSID that is migrating
6333 * @locations: result of query
6334 * @page: buffer
6335 * @cred: credential to use for this operation
6336 *
6337 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6338 * operation failed, or a negative errno if a local error occurred.
6339 *
6340 * On success, "locations" is filled in, but if the server has
6341 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6342 * asserted.
6343 *
6344 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6345 * from this client that require migration recovery.
6346 */
6347int nfs4_proc_get_locations(struct inode *inode,
6348 struct nfs4_fs_locations *locations,
6349 struct page *page, struct rpc_cred *cred)
6350{
6351 struct nfs_server *server = NFS_SERVER(inode);
6352 struct nfs_client *clp = server->nfs_client;
6353 const struct nfs4_mig_recovery_ops *ops =
6354 clp->cl_mvops->mig_recovery_ops;
6355 struct nfs4_exception exception = { };
6356 int status;
6357
6358 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6359 (unsigned long long)server->fsid.major,
6360 (unsigned long long)server->fsid.minor,
6361 clp->cl_hostname);
6362 nfs_display_fhandle(NFS_FH(inode), __func__);
6363
6364 do {
6365 status = ops->get_locations(inode, locations, page, cred);
6366 if (status != -NFS4ERR_DELAY)
6367 break;
6368 nfs4_handle_exception(server, status, &exception);
6369 } while (exception.retry);
6370 return status;
6371}
6372
44c99933
CL		 6373/*
6374 * This operation also signals the server that this client is
6375 * performing "lease moved" recovery. The server can stop
6376 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6377 * is appended to this compound to identify the client ID which is
6378 * performing recovery.
6379 */
6380static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6381{
6382 struct nfs_server *server = NFS_SERVER(inode);
6383 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6384 struct rpc_clnt *clnt = server->client;
6385 struct nfs4_fsid_present_arg args = {
6386 .fh = NFS_FH(inode),
6387 .clientid = clp->cl_clientid,
6388 .renew = 1, /* append RENEW */
6389 };
6390 struct nfs4_fsid_present_res res = {
6391 .renew = 1,
6392 };
6393 struct rpc_message msg = {
6394 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6395 .rpc_argp = &args,
6396 .rpc_resp = &res,
6397 .rpc_cred = cred,
6398 };
6399 unsigned long now = jiffies;
6400 int status;
6401
6402 res.fh = nfs_alloc_fhandle();
6403 if (res.fh == NULL)
6404 return -ENOMEM;
6405
6406 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6407 nfs4_set_sequence_privileged(&args.seq_args);
6408 status = nfs4_call_sync_sequence(clnt, server, &msg,
6409 &args.seq_args, &res.seq_res);
6410 nfs_free_fhandle(res.fh);
6411 if (status)
6412 return status;
6413
6414 do_renew_lease(clp, now);
6415 return 0;
6416}
6417
6418#ifdef CONFIG_NFS_V4_1
6419
6420/*
6421 * This operation also signals the server that this client is
6422 * performing "lease moved" recovery. The server can stop asserting
6423 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6424 * this operation is identified in the SEQUENCE operation in this
6425 * compound.
6426 */
6427static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6428{
6429 struct nfs_server *server = NFS_SERVER(inode);
6430 struct rpc_clnt *clnt = server->client;
6431 struct nfs4_fsid_present_arg args = {
6432 .fh = NFS_FH(inode),
6433 };
6434 struct nfs4_fsid_present_res res = {
6435 };
6436 struct rpc_message msg = {
6437 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6438 .rpc_argp = &args,
6439 .rpc_resp = &res,
6440 .rpc_cred = cred,
6441 };
6442 int status;
6443
6444 res.fh = nfs_alloc_fhandle();
6445 if (res.fh == NULL)
6446 return -ENOMEM;
6447
6448 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6449 nfs4_set_sequence_privileged(&args.seq_args);
6450 status = nfs4_call_sync_sequence(clnt, server, &msg,
6451 &args.seq_args, &res.seq_res);
6452 nfs_free_fhandle(res.fh);
6453 if (status == NFS4_OK &&
6454 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6455 status = -NFS4ERR_LEASE_MOVED;
6456 return status;
6457}
6458
6459#endif /* CONFIG_NFS_V4_1 */
6460
6461/**
6462 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6463 * @inode: inode on FSID to check
6464 * @cred: credential to use for this operation
6465 *
6466 * Server indicates whether the FSID is present, moved, or not
6467 * recognized. This operation is necessary to clear a LEASE_MOVED
6468 * condition for this client ID.
6469 *
6470 * Returns NFS4_OK if the FSID is present on this server,
6471 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6472 * NFS4ERR code if some error occurred on the server, or a
6473 * negative errno if a local failure occurred.
6474 */
6475int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6476{
6477 struct nfs_server *server = NFS_SERVER(inode);
6478 struct nfs_client *clp = server->nfs_client;
6479 const struct nfs4_mig_recovery_ops *ops =
6480 clp->cl_mvops->mig_recovery_ops;
6481 struct nfs4_exception exception = { };
6482 int status;
6483
6484 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6485 (unsigned long long)server->fsid.major,
6486 (unsigned long long)server->fsid.minor,
6487 clp->cl_hostname);
6488 nfs_display_fhandle(NFS_FH(inode), __func__);
6489
6490 do {
6491 status = ops->fsid_present(inode, cred);
6492 if (status != -NFS4ERR_DELAY)
6493 break;
6494 nfs4_handle_exception(server, status, &exception);
6495 } while (exception.retry);
6496 return status;
6497}
6498
5ec16a85 6499/**
a5250def
WAA		 6500 * If 'use_integrity' is true and the state managment nfs_client
6501 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6502 * and the machine credential as per RFC3530bis and RFC5661 Security
6503 * Considerations sections. Otherwise, just use the user cred with the
6504 * filesystem's rpc_client.
5ec16a85 6505 */
a5250def 6506static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6507{
6508 int status;
6509 struct nfs4_secinfo_arg args = {
6510 .dir_fh = NFS_FH(dir),
6511 .name = name,
6512 };
6513 struct nfs4_secinfo_res res = {
6514 .flavors = flavors,
6515 };
6516 struct rpc_message msg = {
6517 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6518 .rpc_argp = &args,
6519 .rpc_resp = &res,
6520 };
a5250def 6521 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6522 struct rpc_cred *cred = NULL;
a5250def
WAA		 6523
6524 if (use_integrity) {
6525 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6526 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6527 msg.rpc_cred = cred;
a5250def 6528 }
5a5ea0d4
BS		 6529
6530 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6531
6532 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6533 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6534
a5250def
WAA		 6535 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6536 &res.seq_res, 0);
5a5ea0d4 6537 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6538
7cb852df
WAA		 6539 if (cred)
6540 put_rpccred(cred);
a5250def 6541
5a5ea0d4
BS		 6542 return status;
6543}
6544
72de53ec
BS		 6545int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6546 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6547{
6548 struct nfs4_exception exception = { };
6549 int err;
6550 do {
a5250def
WAA		 6551 err = -NFS4ERR_WRONGSEC;
6552
6553 /* try to use integrity protection with machine cred */
6554 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6555 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6556
6557 /*
6558 * if unable to use integrity protection, or SECINFO with
6559 * integrity protection returns NFS4ERR_WRONGSEC (which is
6560 * disallowed by spec, but exists in deployed servers) use
6561 * the current filesystem's rpc_client and the user cred.
6562 */
6563 if (err == -NFS4ERR_WRONGSEC)
6564 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6565
078ea3df
TM		 6566 trace_nfs4_secinfo(dir, name, err);
6567 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6568 &exception);
6569 } while (exception.retry);
6570 return err;
6571}
6572
557134a3 6573#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6574/*
6575 * Check the exchange flags returned by the server for invalid flags, having
6576 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6577 * DS flags set.
6578 */
6579static int nfs4_check_cl_exchange_flags(u32 flags)
6580{
6581 if (flags & ~EXCHGID4_FLAG_MASK_R)
6582 goto out_inval;
6583 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6584 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6585 goto out_inval;
6586 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6587 goto out_inval;
6588 return NFS_OK;
6589out_inval:
6590 return -NFS4ERR_INVAL;
6591}
6592
78fe0f41 6593static bool
79d4e1f0
CL		 6594nfs41_same_server_scope(struct nfs41_server_scope *a,
6595 struct nfs41_server_scope *b)
78fe0f41
WAA		 6596{
6597 if (a->server_scope_sz == b->server_scope_sz &&
6598 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6599 return true;
6600
6601 return false;
6602}
6603
7c44f1ae
WAA		 6604/*
6605 * nfs4_proc_bind_conn_to_session()
6606 *
6607 * The 4.1 client currently uses the same TCP connection for the
6608 * fore and backchannel.
6609 */
2cf047c9 6610int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6611{
6612 int status;
6613 struct nfs41_bind_conn_to_session_res res;
6614 struct rpc_message msg = {
6615 .rpc_proc =
6616 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6617 .rpc_argp = clp,
6618 .rpc_resp = &res,
2cf047c9 6619 .rpc_cred = cred,
7c44f1ae
WAA		 6620 };
6621
6622 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 6623
6624 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6625 if (unlikely(res.session == NULL)) {
6626 status = -ENOMEM;
6627 goto out;
6628 }
6629
6630 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6631 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 6632 if (status == 0) {
6633 if (memcmp(res.session->sess_id.data,
6634 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6635 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6636 status = -EIO;
6637 goto out_session;
6638 }
6639 if (res.dir != NFS4_CDFS4_BOTH) {
6640 dprintk("NFS: %s: Unexpected direction from server\n",
6641 __func__);
6642 status = -EIO;
6643 goto out_session;
6644 }
6645 if (res.use_conn_in_rdma_mode) {
6646 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6647 __func__);
6648 status = -EIO;
6649 goto out_session;
6650 }
6651 }
6652out_session:
6653 kfree(res.session);
6654out:
6655 dprintk("<-- %s status= %d\n", __func__, status);
6656 return status;
6657}
6658
99fe60d0 6659/*
fa940720
WAA		 6660 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6661 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6662 */
6663static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6664 .how = SP4_MACH_CRED,
6665 .enforce.u.words = {
6666 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6667 1 << (OP_EXCHANGE_ID - 32) |
6668 1 << (OP_CREATE_SESSION - 32) |
6669 1 << (OP_DESTROY_SESSION - 32) |
6670 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6671 },
6672 .allow.u.words = {
6673 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6674 1 << (OP_LOCKU) |
6675 1 << (OP_COMMIT),
8b5bee2e 6676 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6677 1 << (OP_SECINFO_NO_NAME - 32) |
6678 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6679 1 << (OP_FREE_STATEID - 32) |
6680 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6681 }
6682};
6683
6684/*
6685 * Select the state protection mode for client `clp' given the server results
6686 * from exchange_id in `sp'.
99fe60d0 6687 *
2031cd1a
WAA		 6688 * Returns 0 on success, negative errno otherwise.
6689 */
6690static int nfs4_sp4_select_mode(struct nfs_client *clp,
6691 struct nfs41_state_protection *sp)
6692{
6693 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6694 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6695 1 << (OP_EXCHANGE_ID - 32) |
6696 1 << (OP_CREATE_SESSION - 32) |
6697 1 << (OP_DESTROY_SESSION - 32) |
6698 1 << (OP_DESTROY_CLIENTID - 32)
6699 };
6700 unsigned int i;
6701
6702 if (sp->how == SP4_MACH_CRED) {
6703 /* Print state protect result */
6704 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6705 for (i = 0; i <= LAST_NFS4_OP; i++) {
6706 if (test_bit(i, sp->enforce.u.longs))
6707 dfprintk(MOUNT, " enforce op %d\n", i);
6708 if (test_bit(i, sp->allow.u.longs))
6709 dfprintk(MOUNT, " allow op %d\n", i);
6710 }
6711
6712 /* make sure nothing is on enforce list that isn't supported */
6713 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6714 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6715 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6716 return -EINVAL;
6717 }
6718 }
6719
6720 /*
6721 * Minimal mode - state operations are allowed to use machine
6722 * credential. Note this already happens by default, so the
6723 * client doesn't have to do anything more than the negotiation.
6724 *
6725 * NOTE: we don't care if EXCHANGE_ID is in the list -
6726 * we're already using the machine cred for exchange_id
6727 * and will never use a different cred.
6728 */
6729 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6730 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6731 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6732 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6733 dfprintk(MOUNT, "sp4_mach_cred:\n");
6734 dfprintk(MOUNT, " minimal mode enabled\n");
6735 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6736 } else {
6737 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6738 return -EINVAL;
6739 }
fa940720
WAA		 6740
6741 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6742 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6743 dfprintk(MOUNT, " cleanup mode enabled\n");
6744 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6745 }
8b5bee2e
WAA		 6746
6747 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6748 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6749 dfprintk(MOUNT, " secinfo mode enabled\n");
6750 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6751 }
3787d506
WAA		 6752
6753 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6754 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6755 dfprintk(MOUNT, " stateid mode enabled\n");
6756 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6757 }
8c21c62c
WAA		 6758
6759 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6760 dfprintk(MOUNT, " write mode enabled\n");
6761 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6762 }
6763
6764 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6765 dfprintk(MOUNT, " commit mode enabled\n");
6766 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6767 }
2031cd1a
WAA		 6768 }
6769
6770 return 0;
6771}
6772
6773/*
6774 * _nfs4_proc_exchange_id()
6bbb4ae8 6775 *
2031cd1a 6776 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6777 */
2031cd1a
WAA		 6778static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6779 u32 sp4_how)
99fe60d0
BH		 6780{
6781 nfs4_verifier verifier;
6782 struct nfs41_exchange_id_args args = {
cd93710e 6783 .verifier = &verifier,
99fe60d0 6784 .client = clp,
cd3fadec 6785#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6786 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6787 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6788 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6789#else
6790 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6791 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6792#endif
99fe60d0
BH		 6793 };
6794 struct nfs41_exchange_id_res res = {
32b01310 6795 0
99fe60d0
BH		 6796 };
6797 int status;
6798 struct rpc_message msg = {
6799 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6800 .rpc_argp = &args,
6801 .rpc_resp = &res,
6802 .rpc_cred = cred,
6803 };
99fe60d0 6804
f092075d 6805 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6806 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6807 sizeof(args.id));
6bbb4ae8
CL		 6808 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6809 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6810 args.id_len, args.id);
99fe60d0 6811
acdeb69d 6812 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6813 GFP_NOFS);
acdeb69d 6814 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6815 status = -ENOMEM;
6816 goto out;
6817 }
78fe0f41 6818
79d4e1f0 6819 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6820 GFP_NOFS);
177313f1 6821 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6822 status = -ENOMEM;
acdeb69d 6823 goto out_server_owner;
abe9a6d5 6824 }
78fe0f41 6825
bbafffd2 6826 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6827 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6828 status = -ENOMEM;
6829 goto out_server_scope;
6830 }
6831
2031cd1a
WAA		 6832 switch (sp4_how) {
6833 case SP4_NONE:
6834 args.state_protect.how = SP4_NONE;
6835 break;
6836
6837 case SP4_MACH_CRED:
6838 args.state_protect = nfs4_sp4_mach_cred_request;
6839 break;
6840
6841 default:
6842 /* unsupported! */
6843 WARN_ON_ONCE(1);
6844 status = -EINVAL;
6845 goto out_server_scope;
6846 }
6847
1bd714f2 6848 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6849 trace_nfs4_exchange_id(clp, status);
177313f1 6850 if (status == 0)
32b01310 6851 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6852
2031cd1a
WAA		 6853 if (status == 0)
6854 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6855
acdeb69d 6856 if (status == 0) {
32b01310
TM		 6857 clp->cl_clientid = res.clientid;
6858 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6859 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6860 clp->cl_seqid = res.seqid;
6861
acdeb69d
CL		 6862 kfree(clp->cl_serverowner);
6863 clp->cl_serverowner = res.server_owner;
6864 res.server_owner = NULL;
78fe0f41 6865
7d2ed9ac 6866 /* use the most recent implementation id */
59155546
CL		 6867 kfree(clp->cl_implid);
6868 clp->cl_implid = res.impl_id;
7d2ed9ac 6869
177313f1 6870 if (clp->cl_serverscope != NULL &&
79d4e1f0 6871 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6872 res.server_scope)) {
6873 dprintk("%s: server_scope mismatch detected\n",
6874 __func__);
6875 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6876 kfree(clp->cl_serverscope);
6877 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6878 }
6879
177313f1 6880 if (clp->cl_serverscope == NULL) {
79d4e1f0 6881 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6882 goto out;
6883 }
32b01310
TM		 6884 } else
6885 kfree(res.impl_id);
7d2ed9ac 6886
acdeb69d
CL		 6887out_server_owner:
6888 kfree(res.server_owner);
7d2ed9ac 6889out_server_scope:
abe9a6d5
WAA		 6890 kfree(res.server_scope);
6891out:
177313f1 6892 if (clp->cl_implid != NULL)
6bbb4ae8 6893 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6894 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6895 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6896 clp->cl_implid->date.seconds,
6897 clp->cl_implid->date.nseconds);
6bbb4ae8 6898 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6899 return status;
6900}
6901
2031cd1a
WAA		 6902/*
6903 * nfs4_proc_exchange_id()
6904 *
6905 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6906 *
6907 * Since the clientid has expired, all compounds using sessions
6908 * associated with the stale clientid will be returning
6909 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6910 * be in some phase of session reset.
6911 *
6912 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6913 */
6914int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6915{
6916 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6917 int status;
6918
6919 /* try SP4_MACH_CRED if krb5i/p */
6920 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6921 authflavor == RPC_AUTH_GSS_KRB5P) {
6922 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6923 if (!status)
6924 return 0;
6925 }
6926
6927 /* try SP4_NONE */
6928 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6929}
6930
66245539
TM		 6931static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6932 struct rpc_cred *cred)
6933{
6934 struct rpc_message msg = {
6935 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6936 .rpc_argp = clp,
6937 .rpc_cred = cred,
6938 };
6939 int status;
6940
6941 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6942 trace_nfs4_destroy_clientid(clp, status);
66245539 6943 if (status)
02c67525 6944 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6945 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6946 return status;
6947}
6948
6949static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6950 struct rpc_cred *cred)
6951{
6952 unsigned int loop;
6953 int ret;
6954
6955 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6956 ret = _nfs4_proc_destroy_clientid(clp, cred);
6957 switch (ret) {
6958 case -NFS4ERR_DELAY:
6959 case -NFS4ERR_CLIENTID_BUSY:
6960 ssleep(1);
6961 break;
6962 default:
6963 return ret;
6964 }
6965 }
6966 return 0;
6967}
6968
6969int nfs4_destroy_clientid(struct nfs_client *clp)
6970{
6971 struct rpc_cred *cred;
6972 int ret = 0;
6973
6974 if (clp->cl_mvops->minor_version < 1)
6975 goto out;
6976 if (clp->cl_exchange_flags == 0)
6977 goto out;
05f4c350
CL		 6978 if (clp->cl_preserve_clid)
6979 goto out;
73d8bde5 6980 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6981 ret = nfs4_proc_destroy_clientid(clp, cred);
6982 if (cred)
6983 put_rpccred(cred);
6984 switch (ret) {
6985 case 0:
6986 case -NFS4ERR_STALE_CLIENTID:
6987 clp->cl_exchange_flags = 0;
6988 }
6989out:
6990 return ret;
6991}
6992
2050f0cc
AA		 6993struct nfs4_get_lease_time_data {
6994 struct nfs4_get_lease_time_args *args;
6995 struct nfs4_get_lease_time_res *res;
6996 struct nfs_client *clp;
6997};
6998
6999static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7000 void *calldata)
7001{
2050f0cc
AA		 7002 struct nfs4_get_lease_time_data *data =
7003 (struct nfs4_get_lease_time_data *)calldata;
7004
7005 dprintk("--> %s\n", __func__);
7006 /* just setup sequence, do not trigger session recovery
7007 since we're invoked within one */
d9afbd1b
TM		 7008 nfs41_setup_sequence(data->clp->cl_session,
7009 &data->args->la_seq_args,
7010 &data->res->lr_seq_res,
7011 task);
2050f0cc
AA		 7012 dprintk("<-- %s\n", __func__);
7013}
7014
7015/*
7016 * Called from nfs4_state_manager thread for session setup, so don't recover
7017 * from sequence operation or clientid errors.
7018 */
7019static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7020{
7021 struct nfs4_get_lease_time_data *data =
7022 (struct nfs4_get_lease_time_data *)calldata;
7023
7024 dprintk("--> %s\n", __func__);
14516c3a
TM		 7025 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7026 return;
2050f0cc
AA		 7027 switch (task->tk_status) {
7028 case -NFS4ERR_DELAY:
7029 case -NFS4ERR_GRACE:
7030 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7031 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7032 task->tk_status = 0;
a8a4ae3a
AA		 7033 /* fall through */
7034 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7035 rpc_restart_call_prepare(task);
2050f0cc
AA		 7036 return;
7037 }
2050f0cc
AA		 7038 dprintk("<-- %s\n", __func__);
7039}
7040
17280175 7041static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7042 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7043 .rpc_call_done = nfs4_get_lease_time_done,
7044};
7045
7046int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7047{
7048 struct rpc_task *task;
7049 struct nfs4_get_lease_time_args args;
7050 struct nfs4_get_lease_time_res res = {
7051 .lr_fsinfo = fsinfo,
7052 };
7053 struct nfs4_get_lease_time_data data = {
7054 .args = &args,
7055 .res = &res,
7056 .clp = clp,
7057 };
7058 struct rpc_message msg = {
7059 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7060 .rpc_argp = &args,
7061 .rpc_resp = &res,
7062 };
7063 struct rpc_task_setup task_setup = {
7064 .rpc_client = clp->cl_rpcclient,
7065 .rpc_message = &msg,
7066 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7067 .callback_data = &data,
7068 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7069 };
7070 int status;
7071
a9c92d6b 7072 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7073 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7074 dprintk("--> %s\n", __func__);
7075 task = rpc_run_task(&task_setup);
7076
7077 if (IS_ERR(task))
7078 status = PTR_ERR(task);
7079 else {
7080 status = task->tk_status;
7081 rpc_put_task(task);
7082 }
7083 dprintk("<-- %s return %d\n", __func__, status);
7084
7085 return status;
7086}
7087
fc931582
AA		 7088/*
7089 * Initialize the values to be used by the client in CREATE_SESSION
7090 * If nfs4_init_session set the fore channel request and response sizes,
7091 * use them.
7092 *
7093 * Set the back channel max_resp_sz_cached to zero to force the client to
7094 * always set csa_cachethis to FALSE because the current implementation
7095 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7096 */
7097static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7098{
18aad3d5
AA		 7099 unsigned int max_rqst_sz, max_resp_sz;
7100
7101 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7102 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7103
fc931582 7104 /* Fore channel attributes */
18aad3d5
AA		 7105 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7106 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7107 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7108 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7109
7110 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7111 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7112 __func__,
7113 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7114 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7115
7116 /* Back channel attributes */
fc931582
AA		 7117 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7118 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7119 args->bc_attrs.max_resp_sz_cached = 0;
7120 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7121 args->bc_attrs.max_reqs = 1;
7122
7123 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7124 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7125 __func__,
7126 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7127 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7128 args->bc_attrs.max_reqs);
7129}
7130
43c2e885 7131static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 7132{
43c2e885
BF		 7133 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7134 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
7135
43c2e885
BF		 7136 if (rcvd->max_resp_sz > sent->max_resp_sz)
7137 return -EINVAL;
7138 /*
7139 * Our requested max_ops is the minimum we need; we're not
7140 * prepared to break up compounds into smaller pieces than that.
7141 * So, no point even trying to continue if the server won't
7142 * cooperate:
7143 */
7144 if (rcvd->max_ops < sent->max_ops)
7145 return -EINVAL;
7146 if (rcvd->max_reqs == 0)
7147 return -EINVAL;
b4b9a0c1
VG		 7148 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7149 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7150 return 0;
8d35301d
AA		 7151}
7152
43c2e885
BF		 7153static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
7154{
7155 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7156 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 7157
43c2e885
BF		 7158 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7159 return -EINVAL;
7160 if (rcvd->max_resp_sz < sent->max_resp_sz)
7161 return -EINVAL;
7162 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7163 return -EINVAL;
7164 /* These would render the backchannel useless: */
b4b9a0c1 7165 if (rcvd->max_ops != sent->max_ops)
43c2e885 7166 return -EINVAL;
b4b9a0c1 7167 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 7168 return -EINVAL;
7169 return 0;
7170}
8d35301d 7171
8d35301d
AA		 7172static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7173 struct nfs4_session *session)
7174{
43c2e885 7175 int ret;
8d35301d 7176
43c2e885
BF		 7177 ret = nfs4_verify_fore_channel_attrs(args, session);
7178 if (ret)
7179 return ret;
7180 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 7181}
7182
848f5bda
TM		 7183static int _nfs4_proc_create_session(struct nfs_client *clp,
7184 struct rpc_cred *cred)
fc931582
AA		 7185{
7186 struct nfs4_session *session = clp->cl_session;
7187 struct nfs41_create_session_args args = {
7188 .client = clp,
7189 .cb_program = NFS4_CALLBACK,
7190 };
7191 struct nfs41_create_session_res res = {
7192 .client = clp,
7193 };
7194 struct rpc_message msg = {
7195 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7196 .rpc_argp = &args,
7197 .rpc_resp = &res,
848f5bda 7198 .rpc_cred = cred,
fc931582
AA		 7199 };
7200 int status;
7201
7202 nfs4_init_channel_attrs(&args);
0f91421e 7203 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7204
1bd714f2 7205 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7206 trace_nfs4_create_session(clp, status);
fc931582 7207
43095d39 7208 if (!status) {
8d35301d
AA		 7209 /* Verify the session's negotiated channel_attrs values */
7210 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 7211 /* Increment the clientid slot sequence id */
7212 clp->cl_seqid++;
7213 }
7214
7215 return status;
7216}
7217
7218/*
7219 * Issues a CREATE_SESSION operation to the server.
7220 * It is the responsibility of the caller to verify the session is
7221 * expired before calling this routine.
7222 */
848f5bda 7223int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7224{
7225 int status;
7226 unsigned *ptr;
fc931582
AA		 7227 struct nfs4_session *session = clp->cl_session;
7228
7229 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7230
848f5bda 7231 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7232 if (status)
7233 goto out;
7234
aacd5537
AA		 7235 /* Init or reset the session slot tables */
7236 status = nfs4_setup_session_slot_tables(session);
7237 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7238 if (status)
7239 goto out;
7240
7241 ptr = (unsigned *)&session->sess_id.data[0];
7242 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7243 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7244out:
7245 dprintk("<-- %s\n", __func__);
7246 return status;
7247}
7248
0f3e66c6
AA		 7249/*
7250 * Issue the over-the-wire RPC DESTROY_SESSION.
7251 * The caller must serialize access to this routine.
7252 */
848f5bda
TM		 7253int nfs4_proc_destroy_session(struct nfs4_session *session,
7254 struct rpc_cred *cred)
0f3e66c6 7255{
848f5bda
TM		 7256 struct rpc_message msg = {
7257 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7258 .rpc_argp = session,
7259 .rpc_cred = cred,
7260 };
0f3e66c6 7261 int status = 0;
0f3e66c6
AA		 7262
7263 dprintk("--> nfs4_proc_destroy_session\n");
7264
7265 /* session is still being setup */
7266 if (session->clp->cl_cons_state != NFS_CS_READY)
7267 return status;
7268
1bd714f2 7269 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7270 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7271
7272 if (status)
08106ac7 7273 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7274 "Session has been destroyed regardless...\n", status);
7275
7276 dprintk("<-- nfs4_proc_destroy_session\n");
7277 return status;
7278}
7279
fc01cea9
AA		 7280/*
7281 * Renew the cl_session lease.
7282 */
d5f8d3fe
TM		 7283struct nfs4_sequence_data {
7284 struct nfs_client *clp;
7285 struct nfs4_sequence_args args;
7286 struct nfs4_sequence_res res;
7287};
7288
dc96aef9
AB		 7289static void nfs41_sequence_release(void *data)
7290{
d5f8d3fe
TM		 7291 struct nfs4_sequence_data *calldata = data;
7292 struct nfs_client *clp = calldata->clp;
dc96aef9 7293
7135840f
AB		 7294 if (atomic_read(&clp->cl_count) > 1)
7295 nfs4_schedule_state_renewal(clp);
7296 nfs_put_client(clp);
d5f8d3fe 7297 kfree(calldata);
dc96aef9
AB		 7298}
7299
aa5190d0
TM		 7300static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7301{
7302 switch(task->tk_status) {
7303 case -NFS4ERR_DELAY:
aa5190d0
TM		 7304 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7305 return -EAGAIN;
7306 default:
0400a6b0 7307 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7308 }
7309 return 0;
7310}
7311
dc96aef9 7312static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7313{
d5f8d3fe
TM		 7314 struct nfs4_sequence_data *calldata = data;
7315 struct nfs_client *clp = calldata->clp;
fc01cea9 7316
14516c3a
TM		 7317 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7318 return;
fc01cea9 7319
c6d01c6f 7320 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7321 if (task->tk_status < 0) {
7322 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7323 if (atomic_read(&clp->cl_count) == 1)
7324 goto out;
fc01cea9 7325
aa5190d0
TM		 7326 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7327 rpc_restart_call_prepare(task);
fc01cea9
AA		 7328 return;
7329 }
7330 }
fc01cea9 7331 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7332out:
fc01cea9
AA		 7333 dprintk("<-- %s\n", __func__);
7334}
7335
7336static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7337{
d5f8d3fe
TM		 7338 struct nfs4_sequence_data *calldata = data;
7339 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7340 struct nfs4_sequence_args *args;
7341 struct nfs4_sequence_res *res;
7342
fc01cea9
AA		 7343 args = task->tk_msg.rpc_argp;
7344 res = task->tk_msg.rpc_resp;
7345
d9afbd1b 7346 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7347}
7348
7349static const struct rpc_call_ops nfs41_sequence_ops = {
7350 .rpc_call_done = nfs41_sequence_call_done,
7351 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7352 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7353};
7354
8fe72bac
TM		 7355static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7356 struct rpc_cred *cred,
7357 bool is_privileged)
fc01cea9 7358{
d5f8d3fe 7359 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7360 struct rpc_message msg = {
7361 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7362 .rpc_cred = cred,
7363 };
71ac6da9
TM		 7364 struct rpc_task_setup task_setup_data = {
7365 .rpc_client = clp->cl_rpcclient,
7366 .rpc_message = &msg,
8fe72bac 7367 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7368 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7369 };
fc01cea9 7370
7135840f 7371 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7372 return ERR_PTR(-EIO);
dfb4f309 7373 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7374 if (calldata == NULL) {
7135840f 7375 nfs_put_client(clp);
71ac6da9 7376 return ERR_PTR(-ENOMEM);
fc01cea9 7377 }
a9c92d6b 7378 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7379 if (is_privileged)
7380 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7381 msg.rpc_argp = &calldata->args;
7382 msg.rpc_resp = &calldata->res;
7383 calldata->clp = clp;
71ac6da9 7384 task_setup_data.callback_data = calldata;
fc01cea9 7385
71ac6da9
TM		 7386 return rpc_run_task(&task_setup_data);
7387}
7388
2f60ea6b 7389static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7390{
7391 struct rpc_task *task;
7392 int ret = 0;
7393
2f60ea6b 7394 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7395 return -EAGAIN;
8fe72bac 7396 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7397 if (IS_ERR(task))
7398 ret = PTR_ERR(task);
7399 else
bf294b41 7400 rpc_put_task_async(task);
71ac6da9
TM		 7401 dprintk("<-- %s status=%d\n", __func__, ret);
7402 return ret;
7403}
7404
7405static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7406{
7407 struct rpc_task *task;
7408 int ret;
7409
8fe72bac 7410 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7411 if (IS_ERR(task)) {
7412 ret = PTR_ERR(task);
7413 goto out;
7414 }
7415 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7416 if (!ret) {
7417 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7418
7419 if (task->tk_status == 0)
7420 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7421 ret = task->tk_status;
b4410c2f 7422 }
71ac6da9
TM		 7423 rpc_put_task(task);
7424out:
7425 dprintk("<-- %s status=%d\n", __func__, ret);
7426 return ret;
fc01cea9
AA		 7427}
7428
fce5c838
RL		 7429struct nfs4_reclaim_complete_data {
7430 struct nfs_client *clp;
7431 struct nfs41_reclaim_complete_args arg;
7432 struct nfs41_reclaim_complete_res res;
7433};
7434
7435static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7436{
7437 struct nfs4_reclaim_complete_data *calldata = data;
7438
d9afbd1b
TM		 7439 nfs41_setup_sequence(calldata->clp->cl_session,
7440 &calldata->arg.seq_args,
7441 &calldata->res.seq_res,
7442 task);
fce5c838
RL		 7443}
7444
aa5190d0
TM		 7445static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7446{
7447 switch(task->tk_status) {
7448 case 0:
7449 case -NFS4ERR_COMPLETE_ALREADY:
7450 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7451 break;
7452 case -NFS4ERR_DELAY:
aa5190d0 7453 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7454 /* fall through */
7455 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7456 return -EAGAIN;
7457 default:
0400a6b0 7458 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7459 }
7460 return 0;
7461}
7462
fce5c838
RL		 7463static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7464{
7465 struct nfs4_reclaim_complete_data *calldata = data;
7466 struct nfs_client *clp = calldata->clp;
7467 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7468
7469 dprintk("--> %s\n", __func__);
14516c3a
TM		 7470 if (!nfs41_sequence_done(task, res))
7471 return;
fce5c838 7472
c6d01c6f 7473 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7474 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7475 rpc_restart_call_prepare(task);
7476 return;
7477 }
fce5c838
RL		 7478 dprintk("<-- %s\n", __func__);
7479}
7480
7481static void nfs4_free_reclaim_complete_data(void *data)
7482{
7483 struct nfs4_reclaim_complete_data *calldata = data;
7484
7485 kfree(calldata);
7486}
7487
7488static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7489 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7490 .rpc_call_done = nfs4_reclaim_complete_done,
7491 .rpc_release = nfs4_free_reclaim_complete_data,
7492};
7493
7494/*
7495 * Issue a global reclaim complete.
7496 */
965e9c23
TM		 7497static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7498 struct rpc_cred *cred)
fce5c838
RL		 7499{
7500 struct nfs4_reclaim_complete_data *calldata;
7501 struct rpc_task *task;
7502 struct rpc_message msg = {
7503 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7504 .rpc_cred = cred,
fce5c838
RL		 7505 };
7506 struct rpc_task_setup task_setup_data = {
7507 .rpc_client = clp->cl_rpcclient,
7508 .rpc_message = &msg,
7509 .callback_ops = &nfs4_reclaim_complete_call_ops,
7510 .flags = RPC_TASK_ASYNC,
7511 };
7512 int status = -ENOMEM;
7513
7514 dprintk("--> %s\n", __func__);
8535b2be 7515 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7516 if (calldata == NULL)
7517 goto out;
7518 calldata->clp = clp;
7519 calldata->arg.one_fs = 0;
fce5c838 7520
a9c92d6b 7521 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7522 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7523 msg.rpc_argp = &calldata->arg;
7524 msg.rpc_resp = &calldata->res;
7525 task_setup_data.callback_data = calldata;
7526 task = rpc_run_task(&task_setup_data);
acf82b85 7527 if (IS_ERR(task)) {
fce5c838 7528 status = PTR_ERR(task);
acf82b85
DC		 7529 goto out;
7530 }
c34c32ea
AA		 7531 status = nfs4_wait_for_completion_rpc_task(task);
7532 if (status == 0)
7533 status = task->tk_status;
fce5c838 7534 rpc_put_task(task);
acf82b85 7535 return 0;
fce5c838
RL		 7536out:
7537 dprintk("<-- %s status=%d\n", __func__, status);
7538 return status;
7539}
b1f69b75
AA		 7540
7541static void
7542nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7543{
7544 struct nfs4_layoutget *lgp = calldata;
c31663d4 7545 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7546 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7547
7548 dprintk("--> %s\n", __func__);
c31663d4
FI		 7549 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7550 * right now covering the LAYOUTGET we are about to send.
7551 * However, that is not so catastrophic, and there seems
7552 * to be no way to prevent it completely.
7553 */
6ba7db34 7554 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7555 &lgp->res.seq_res, task))
b1f69b75 7556 return;
cf7d63f1
FI		 7557 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7558 NFS_I(lgp->args.inode)->layout,
7559 lgp->args.ctx->state)) {
7560 rpc_exit(task, NFS4_OK);
cf7d63f1 7561 }
b1f69b75
AA		 7562}
7563
7564static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7565{
7566 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7567 struct inode *inode = lgp->args.inode;
7568 struct nfs_server *server = NFS_SERVER(inode);
7569 struct pnfs_layout_hdr *lo;
7570 struct nfs4_state *state = NULL;
ed7e5423 7571 unsigned long timeo, now, giveup;
b1f69b75 7572
ed7e5423 7573 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7574
6ba7db34 7575 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7576 goto out;
b1f69b75
AA		 7577
7578 switch (task->tk_status) {
7579 case 0:
ee314c2a 7580 goto out;
ed7e5423
BH		 7581 /*
7582 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7583 * (or clients) writing to the same RAID stripe
7584 */
b1f69b75 7585 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7586 /*
7587 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7588 * existing layout before getting a new one).
7589 */
b1f69b75 7590 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7591 timeo = rpc_get_timeout(task->tk_client);
7592 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7593 now = jiffies;
7594 if (time_after(giveup, now)) {
7595 unsigned long delay;
7596
7597 /* Delay for:
7598 * - Not less then NFS4_POLL_RETRY_MIN.
7599 * - One last time a jiffie before we give up
7600 * - exponential backoff (time_now minus start_attempt)
7601 */
7602 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7603 min((giveup - now - 1),
7604 now - lgp->args.timestamp));
7605
7606 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7607 __func__, delay);
7608 rpc_delay(task, delay);
7609 task->tk_status = 0;
7610 rpc_restart_call_prepare(task);
7611 goto out; /* Do not call nfs4_async_handle_error() */
7612 }
ee314c2a
TM		 7613 break;
7614 case -NFS4ERR_EXPIRED:
7615 case -NFS4ERR_BAD_STATEID:
7616 spin_lock(&inode->i_lock);
7617 lo = NFS_I(inode)->layout;
7618 if (!lo || list_empty(&lo->plh_segs)) {
7619 spin_unlock(&inode->i_lock);
7620 /* If the open stateid was bad, then recover it. */
7621 state = lgp->args.ctx->state;
7622 } else {
7623 LIST_HEAD(head);
7624
defb8460
CH		 7625 /*
7626 * Mark the bad layout state as invalid, then retry
7627 * with the current stateid.
7628 */
ee314c2a
TM		 7629 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7630 spin_unlock(&inode->i_lock);
ee314c2a 7631 pnfs_free_lseg_list(&head);
defb8460
CH		 7632
7633 task->tk_status = 0;
7634 rpc_restart_call_prepare(task);
b1f69b75
AA		 7635 }
7636 }
8478eaa1 7637 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
ee314c2a
TM		 7638 rpc_restart_call_prepare(task);
7639out:
b1f69b75
AA		 7640 dprintk("<-- %s\n", __func__);
7641}
7642
8554116e
IK		 7643static size_t max_response_pages(struct nfs_server *server)
7644{
7645 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7646 return nfs_page_array_len(0, max_resp_sz);
7647}
7648
7649static void nfs4_free_pages(struct page **pages, size_t size)
7650{
7651 int i;
7652
7653 if (!pages)
7654 return;
7655
7656 for (i = 0; i < size; i++) {
7657 if (!pages[i])
7658 break;
7659 __free_page(pages[i]);
7660 }
7661 kfree(pages);
7662}
7663
7664static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7665{
7666 struct page **pages;
7667 int i;
7668
7669 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7670 if (!pages) {
7671 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7672 return NULL;
7673 }
7674
7675 for (i = 0; i < size; i++) {
7676 pages[i] = alloc_page(gfp_flags);
7677 if (!pages[i]) {
7678 dprintk("%s: failed to allocate page\n", __func__);
7679 nfs4_free_pages(pages, size);
7680 return NULL;
7681 }
7682 }
7683
7684 return pages;
7685}
7686
b1f69b75
AA		 7687static void nfs4_layoutget_release(void *calldata)
7688{
7689 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7690 struct inode *inode = lgp->args.inode;
7691 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7692 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7693
7694 dprintk("--> %s\n", __func__);
8554116e 7695 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7696 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7697 put_nfs_open_context(lgp->args.ctx);
7698 kfree(calldata);
7699 dprintk("<-- %s\n", __func__);
7700}
7701
7702static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7703 .rpc_call_prepare = nfs4_layoutget_prepare,
7704 .rpc_call_done = nfs4_layoutget_done,
7705 .rpc_release = nfs4_layoutget_release,
7706};
7707
a0b0a6e3
TM		 7708struct pnfs_layout_segment *
7709nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7710{
a47970ff
WAA		 7711 struct inode *inode = lgp->args.inode;
7712 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7713 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7714 struct rpc_task *task;
7715 struct rpc_message msg = {
7716 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7717 .rpc_argp = &lgp->args,
7718 .rpc_resp = &lgp->res,
6ab59344 7719 .rpc_cred = lgp->cred,
b1f69b75
AA		 7720 };
7721 struct rpc_task_setup task_setup_data = {
7722 .rpc_client = server->client,
7723 .rpc_message = &msg,
7724 .callback_ops = &nfs4_layoutget_call_ops,
7725 .callback_data = lgp,
7726 .flags = RPC_TASK_ASYNC,
7727 };
a0b0a6e3 7728 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7729 int status = 0;
7730
7731 dprintk("--> %s\n", __func__);
7732
4bd5a980
PT		 7733 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7734 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7735
8554116e
IK		 7736 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7737 if (!lgp->args.layout.pages) {
7738 nfs4_layoutget_release(lgp);
a0b0a6e3 7739 return ERR_PTR(-ENOMEM);
8554116e
IK		 7740 }
7741 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7742 lgp->args.timestamp = jiffies;
8554116e 7743
35124a09 7744 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7745 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7746 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 7747
b1f69b75
AA		 7748 task = rpc_run_task(&task_setup_data);
7749 if (IS_ERR(task))
a0b0a6e3 7750 return ERR_CAST(task);
b1f69b75 7751 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7752 if (status == 0)
7753 status = task->tk_status;
1037e6ea
TM		 7754 trace_nfs4_layoutget(lgp->args.ctx,
7755 &lgp->args.range,
7756 &lgp->res.range,
7757 status);
085b7a45
WAA		 7758 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7759 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7760 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7761 rpc_put_task(task);
7762 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7763 if (status)
7764 return ERR_PTR(status);
7765 return lseg;
b1f69b75
AA		 7766}
7767
cbe82603
BH		 7768static void
7769nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7770{
7771 struct nfs4_layoutreturn *lrp = calldata;
7772
7773 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7774 nfs41_setup_sequence(lrp->clp->cl_session,
7775 &lrp->args.seq_args,
7776 &lrp->res.seq_res,
7777 task);
cbe82603
BH		 7778}
7779
7780static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7781{
7782 struct nfs4_layoutreturn *lrp = calldata;
7783 struct nfs_server *server;
7784
7785 dprintk("--> %s\n", __func__);
7786
6ba7db34 7787 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7788 return;
7789
7790 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7791 switch (task->tk_status) {
7792 default:
7793 task->tk_status = 0;
7794 case 0:
7795 break;
7796 case -NFS4ERR_DELAY:
8478eaa1 7797 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 7798 break;
d00c5d43 7799 rpc_restart_call_prepare(task);
cbe82603
BH		 7800 return;
7801 }
cbe82603
BH		 7802 dprintk("<-- %s\n", __func__);
7803}
7804
7805static void nfs4_layoutreturn_release(void *calldata)
7806{
7807 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7808 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7809
7810 dprintk("--> %s\n", __func__);
849b286f
TM		 7811 spin_lock(&lo->plh_inode->i_lock);
7812 if (lrp->res.lrs_present)
7813 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7814 lo->plh_block_lgets--;
7815 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7816 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 7817 kfree(calldata);
7818 dprintk("<-- %s\n", __func__);
7819}
7820
7821static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7822 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7823 .rpc_call_done = nfs4_layoutreturn_done,
7824 .rpc_release = nfs4_layoutreturn_release,
7825};
7826
7827int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7828{
7829 struct rpc_task *task;
7830 struct rpc_message msg = {
7831 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7832 .rpc_argp = &lrp->args,
7833 .rpc_resp = &lrp->res,
9556000d 7834 .rpc_cred = lrp->cred,
cbe82603
BH		 7835 };
7836 struct rpc_task_setup task_setup_data = {
1771c577 7837 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7838 .rpc_message = &msg,
7839 .callback_ops = &nfs4_layoutreturn_call_ops,
7840 .callback_data = lrp,
7841 };
7842 int status;
7843
7844 dprintk("--> %s\n", __func__);
a9c92d6b 7845 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7846 task = rpc_run_task(&task_setup_data);
7847 if (IS_ERR(task))
7848 return PTR_ERR(task);
7849 status = task->tk_status;
1037e6ea 7850 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7851 dprintk("<-- %s status=%d\n", __func__, status);
7852 rpc_put_task(task);
7853 return status;
7854}
7855
b1f69b75 7856static int
cd5875fe
TM		 7857_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7858 struct pnfs_device *pdev,
7859 struct rpc_cred *cred)
b1f69b75
AA		 7860{
7861 struct nfs4_getdeviceinfo_args args = {
7862 .pdev = pdev,
7863 };
7864 struct nfs4_getdeviceinfo_res res = {
7865 .pdev = pdev,
7866 };
7867 struct rpc_message msg = {
7868 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7869 .rpc_argp = &args,
7870 .rpc_resp = &res,
cd5875fe 7871 .rpc_cred = cred,
b1f69b75
AA		 7872 };
7873 int status;
7874
7875 dprintk("--> %s\n", __func__);
7c513058 7876 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7877 dprintk("<-- %s status=%d\n", __func__, status);
7878
7879 return status;
7880}
7881
cd5875fe
TM		 7882int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7883 struct pnfs_device *pdev,
7884 struct rpc_cred *cred)
b1f69b75
AA		 7885{
7886 struct nfs4_exception exception = { };
7887 int err;
7888
7889 do {
7890 err = nfs4_handle_exception(server,
cd5875fe 7891 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7892 &exception);
7893 } while (exception.retry);
7894 return err;
7895}
7896EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7897
863a3c6c
AA		 7898static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7899{
7900 struct nfs4_layoutcommit_data *data = calldata;
7901 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7902 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7903
d9afbd1b
TM		 7904 nfs41_setup_sequence(session,
7905 &data->args.seq_args,
7906 &data->res.seq_res,
7907 task);
863a3c6c
AA		 7908}
7909
7910static void
7911nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7912{
7913 struct nfs4_layoutcommit_data *data = calldata;
7914 struct nfs_server *server = NFS_SERVER(data->args.inode);
7915
6ba7db34 7916 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7917 return;
7918
7919 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7920 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7921 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7922 case -NFS4ERR_BADLAYOUT: /* no layout */
7923 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7924 task->tk_status = 0;
e59d27e0 7925 case 0:
e59d27e0
TM		 7926 break;
7927 default:
8478eaa1 7928 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 7929 rpc_restart_call_prepare(task);
7930 return;
7931 }
7932 }
863a3c6c
AA		 7933}
7934
7935static void nfs4_layoutcommit_release(void *calldata)
7936{
7937 struct nfs4_layoutcommit_data *data = calldata;
7938
db29c089 7939 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 7940 nfs_post_op_update_inode_force_wcc(data->args.inode,
7941 data->res.fattr);
863a3c6c
AA		 7942 put_rpccred(data->cred);
7943 kfree(data);
7944}
7945
7946static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7947 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7948 .rpc_call_done = nfs4_layoutcommit_done,
7949 .rpc_release = nfs4_layoutcommit_release,
7950};
7951
7952int
ef311537 7953nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7954{
7955 struct rpc_message msg = {
7956 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7957 .rpc_argp = &data->args,
7958 .rpc_resp = &data->res,
7959 .rpc_cred = data->cred,
7960 };
7961 struct rpc_task_setup task_setup_data = {
7962 .task = &data->task,
7963 .rpc_client = NFS_CLIENT(data->args.inode),
7964 .rpc_message = &msg,
7965 .callback_ops = &nfs4_layoutcommit_ops,
7966 .callback_data = data,
7967 .flags = RPC_TASK_ASYNC,
7968 };
7969 struct rpc_task *task;
7970 int status = 0;
7971
7972 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7973 "lbw: %llu inode %lu\n",
7974 data->task.tk_pid, sync,
7975 data->args.lastbytewritten,
7976 data->args.inode->i_ino);
7977
a9c92d6b 7978 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7979 task = rpc_run_task(&task_setup_data);
7980 if (IS_ERR(task))
7981 return PTR_ERR(task);
ef311537 7982 if (sync == false)
863a3c6c
AA		 7983 goto out;
7984 status = nfs4_wait_for_completion_rpc_task(task);
7985 if (status != 0)
7986 goto out;
7987 status = task->tk_status;
1037e6ea 7988 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7989out:
7990 dprintk("%s: status %d\n", __func__, status);
7991 rpc_put_task(task);
7992 return status;
7993}
fca78d6d 7994
97431204
AA		 7995/**
7996 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7997 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7998 */
fca78d6d
BS		 7999static int
8000_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8001 struct nfs_fsinfo *info,
8002 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8003{
8004 struct nfs41_secinfo_no_name_args args = {
8005 .style = SECINFO_STYLE_CURRENT_FH,
8006 };
8007 struct nfs4_secinfo_res res = {
8008 .flavors = flavors,
8009 };
8010 struct rpc_message msg = {
8011 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8012 .rpc_argp = &args,
8013 .rpc_resp = &res,
8014 };
b1b3e136 8015 struct rpc_clnt *clnt = server->client;
7cb852df 8016 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8017 int status;
8018
8019 if (use_integrity) {
8020 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8021 cred = nfs4_get_clid_cred(server->nfs_client);
8022 msg.rpc_cred = cred;
b1b3e136
WAA		 8023 }
8024
8025 dprintk("--> %s\n", __func__);
8026 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8027 &res.seq_res, 0);
8028 dprintk("<-- %s status=%d\n", __func__, status);
8029
7cb852df
WAA		 8030 if (cred)
8031 put_rpccred(cred);
b1b3e136
WAA		 8032
8033 return status;
fca78d6d
BS		 8034}
8035
8036static int
8037nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8038 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8039{
8040 struct nfs4_exception exception = { };
8041 int err;
8042 do {
b1b3e136
WAA		 8043 /* first try using integrity protection */
8044 err = -NFS4ERR_WRONGSEC;
8045
8046 /* try to use integrity protection with machine cred */
8047 if (_nfs4_is_integrity_protected(server->nfs_client))
8048 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8049 flavors, true);
8050
8051 /*
8052 * if unable to use integrity protection, or SECINFO with
8053 * integrity protection returns NFS4ERR_WRONGSEC (which is
8054 * disallowed by spec, but exists in deployed servers) use
8055 * the current filesystem's rpc_client and the user cred.
8056 */
8057 if (err == -NFS4ERR_WRONGSEC)
8058 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8059 flavors, false);
8060
fca78d6d
BS		 8061 switch (err) {
8062 case 0:
8063 case -NFS4ERR_WRONGSEC:
78b19bae 8064 case -ENOTSUPP:
05e9cfb4 8065 goto out;
fca78d6d
BS		 8066 default:
8067 err = nfs4_handle_exception(server, err, &exception);
8068 }
8069 } while (exception.retry);
05e9cfb4 8070out:
fca78d6d
BS		 8071 return err;
8072}
8073
8074static int
8075nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8076 struct nfs_fsinfo *info)
8077{
8078 int err;
8079 struct page *page;
367156d9 8080 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8081 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8082 struct nfs4_secinfo4 *secinfo;
8083 int i;
fca78d6d
BS		 8084
8085 page = alloc_page(GFP_KERNEL);
8086 if (!page) {
8087 err = -ENOMEM;
8088 goto out;
8089 }
8090
8091 flavors = page_address(page);
8092 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8093
8094 /*
8095 * Fall back on "guess and check" method if
8096 * the server doesn't support SECINFO_NO_NAME
8097 */
78b19bae 8098 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8099 err = nfs4_find_root_sec(server, fhandle, info);
8100 goto out_freepage;
8101 }
8102 if (err)
8103 goto out_freepage;
8104
58a8cf12
WAA		 8105 for (i = 0; i < flavors->num_flavors; i++) {
8106 secinfo = &flavors->flavors[i];
8107
8108 switch (secinfo->flavor) {
8109 case RPC_AUTH_NULL:
8110 case RPC_AUTH_UNIX:
8111 case RPC_AUTH_GSS:
8112 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8113 &secinfo->flavor_info);
8114 break;
8115 default:
8116 flavor = RPC_AUTH_MAXFLAVOR;
8117 break;
8118 }
8119
4d4b69dd
WAA		 8120 if (!nfs_auth_info_match(&server->auth_info, flavor))
8121 flavor = RPC_AUTH_MAXFLAVOR;
8122
58a8cf12
WAA		 8123 if (flavor != RPC_AUTH_MAXFLAVOR) {
8124 err = nfs4_lookup_root_sec(server, fhandle,
8125 info, flavor);
8126 if (!err)
8127 break;
8128 }
8129 }
8130
8131 if (flavor == RPC_AUTH_MAXFLAVOR)
8132 err = -EPERM;
fca78d6d
BS		 8133
8134out_freepage:
8135 put_page(page);
8136 if (err == -EACCES)
8137 return -EPERM;
8138out:
8139 return err;
8140}
1cab0652 8141
ab7cb0df
TM		 8142static int _nfs41_test_stateid(struct nfs_server *server,
8143 nfs4_stateid *stateid,
8144 struct rpc_cred *cred)
7d974794
BS		 8145{
8146 int status;
8147 struct nfs41_test_stateid_args args = {
1cab0652 8148 .stateid = stateid,
7d974794
BS		 8149 };
8150 struct nfs41_test_stateid_res res;
8151 struct rpc_message msg = {
8152 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8153 .rpc_argp = &args,
8154 .rpc_resp = &res,
ab7cb0df 8155 .rpc_cred = cred,
7d974794 8156 };
3787d506
WAA		 8157 struct rpc_clnt *rpc_client = server->client;
8158
8159 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8160 &rpc_client, &msg);
1cab0652 8161
38527b15 8162 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8163 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8164 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8165 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8166 &args.seq_args, &res.seq_res);
38527b15
CL		 8167 if (status != NFS_OK) {
8168 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8169 return status;
38527b15
CL		 8170 }
8171 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8172 return -res.status;
7d974794
BS		 8173}
8174
38527b15
CL		 8175/**
8176 * nfs41_test_stateid - perform a TEST_STATEID operation
8177 *
8178 * @server: server / transport on which to perform the operation
8179 * @stateid: state ID to test
ab7cb0df 8180 * @cred: credential
38527b15
CL		 8181 *
8182 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8183 * Otherwise a negative NFS4ERR value is returned if the operation
8184 * failed or the state ID is not currently valid.
8185 */
ab7cb0df
TM		 8186static int nfs41_test_stateid(struct nfs_server *server,
8187 nfs4_stateid *stateid,
8188 struct rpc_cred *cred)
7d974794
BS		 8189{
8190 struct nfs4_exception exception = { };
8191 int err;
8192 do {
ab7cb0df 8193 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8194 if (err != -NFS4ERR_DELAY)
8195 break;
8196 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8197 } while (exception.retry);
8198 return err;
8199}
9aeda35f 8200
7c1d5fae
TM		 8201struct nfs_free_stateid_data {
8202 struct nfs_server *server;
8203 struct nfs41_free_stateid_args args;
9aeda35f 8204 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8205};
8206
8207static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8208{
8209 struct nfs_free_stateid_data *data = calldata;
8210 nfs41_setup_sequence(nfs4_get_session(data->server),
8211 &data->args.seq_args,
8212 &data->res.seq_res,
8213 task);
8214}
8215
8216static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8217{
8218 struct nfs_free_stateid_data *data = calldata;
8219
8220 nfs41_sequence_done(task, &data->res.seq_res);
8221
8222 switch (task->tk_status) {
8223 case -NFS4ERR_DELAY:
8478eaa1 8224 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8225 rpc_restart_call_prepare(task);
8226 }
8227}
8228
8229static void nfs41_free_stateid_release(void *calldata)
8230{
8231 kfree(calldata);
8232}
8233
17f26b12 8234static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8235 .rpc_call_prepare = nfs41_free_stateid_prepare,
8236 .rpc_call_done = nfs41_free_stateid_done,
8237 .rpc_release = nfs41_free_stateid_release,
8238};
8239
8240static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8241 nfs4_stateid *stateid,
ab7cb0df 8242 struct rpc_cred *cred,
7c1d5fae
TM		 8243 bool privileged)
8244{
9aeda35f
BS		 8245 struct rpc_message msg = {
8246 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8247 .rpc_cred = cred,
9aeda35f 8248 };
7c1d5fae
TM		 8249 struct rpc_task_setup task_setup = {
8250 .rpc_client = server->client,
8251 .rpc_message = &msg,
8252 .callback_ops = &nfs41_free_stateid_ops,
8253 .flags = RPC_TASK_ASYNC,
8254 };
8255 struct nfs_free_stateid_data *data;
9aeda35f 8256
3787d506
WAA		 8257 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8258 &task_setup.rpc_client, &msg);
8259
38527b15 8260 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8261 data = kmalloc(sizeof(*data), GFP_NOFS);
8262 if (!data)
8263 return ERR_PTR(-ENOMEM);
8264 data->server = server;
8265 nfs4_stateid_copy(&data->args.stateid, stateid);
8266
8267 task_setup.callback_data = data;
8268
8269 msg.rpc_argp = &data->args;
8270 msg.rpc_resp = &data->res;
a9c92d6b 8271 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8272 if (privileged)
8273 nfs4_set_sequence_privileged(&data->args.seq_args);
8274
8275 return rpc_run_task(&task_setup);
9aeda35f
BS		 8276}
8277
38527b15
CL		 8278/**
8279 * nfs41_free_stateid - perform a FREE_STATEID operation
8280 *
8281 * @server: server / transport on which to perform the operation
8282 * @stateid: state ID to release
ab7cb0df 8283 * @cred: credential
38527b15
CL		 8284 *
8285 * Returns NFS_OK if the server freed "stateid". Otherwise a
8286 * negative NFS4ERR value is returned.
8287 */
ab7cb0df
TM		 8288static int nfs41_free_stateid(struct nfs_server *server,
8289 nfs4_stateid *stateid,
8290 struct rpc_cred *cred)
9aeda35f 8291{
7c1d5fae
TM		 8292 struct rpc_task *task;
8293 int ret;
8294
ab7cb0df 8295 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8296 if (IS_ERR(task))
8297 return PTR_ERR(task);
8298 ret = rpc_wait_for_completion_task(task);
8299 if (!ret)
8300 ret = task->tk_status;
8301 rpc_put_task(task);
8302 return ret;
9aeda35f 8303}
36281caa 8304
f1cdae87
JL		 8305static void
8306nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8307{
8308 struct rpc_task *task;
ab7cb0df 8309 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8310
ab7cb0df 8311 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8312 nfs4_free_lock_state(server, lsp);
8313 if (IS_ERR(task))
f1cdae87 8314 return;
c8b2d0bf 8315 rpc_put_task(task);
c8b2d0bf
TM		 8316}
8317
36281caa
TM		 8318static bool nfs41_match_stateid(const nfs4_stateid *s1,
8319 const nfs4_stateid *s2)
8320{
2d2f24ad 8321 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8322 return false;
8323
2d2f24ad 8324 if (s1->seqid == s2->seqid)
36281caa 8325 return true;
2d2f24ad 8326 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8327 return true;
8328
8329 return false;
8330}
8331
557134a3
AA		 8332#endif /* CONFIG_NFS_V4_1 */
8333
36281caa
TM		 8334static bool nfs4_match_stateid(const nfs4_stateid *s1,
8335 const nfs4_stateid *s2)
8336{
f597c537 8337 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8338}
8339
8340
17280175 8341static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8342 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8343 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8344 .recover_open = nfs4_open_reclaim,
8345 .recover_lock = nfs4_lock_reclaim,
591d71cb 8346 .establish_clid = nfs4_init_clientid,
05f4c350 8347 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8348};
8349
591d71cb 8350#if defined(CONFIG_NFS_V4_1)
17280175 8351static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8352 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8353 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8354 .recover_open = nfs4_open_reclaim,
8355 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8356 .establish_clid = nfs41_init_clientid,
fce5c838 8357 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8358 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8359};
8360#endif /* CONFIG_NFS_V4_1 */
8361
17280175 8362static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8363 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8364 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8365 .recover_open = nfs40_open_expired,
591d71cb
AA		 8366 .recover_lock = nfs4_lock_expired,
8367 .establish_clid = nfs4_init_clientid,
8368};
8369
8370#if defined(CONFIG_NFS_V4_1)
17280175 8371static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8372 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8373 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8374 .recover_open = nfs41_open_expired,
8375 .recover_lock = nfs41_lock_expired,
4d643d1d 8376 .establish_clid = nfs41_init_clientid,
1da177e4 8377};
591d71cb 8378#endif /* CONFIG_NFS_V4_1 */
1da177e4 8379
17280175 8380static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8381 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8382 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8383 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8384};
8385
8386#if defined(CONFIG_NFS_V4_1)
17280175 8387static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8388 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8389 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8390 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8391};
8392#endif
8393
ec011fe8 8394static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8395 .get_locations = _nfs40_proc_get_locations,
44c99933 8396 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8397};
8398
8399#if defined(CONFIG_NFS_V4_1)
8400static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8401 .get_locations = _nfs41_proc_get_locations,
44c99933 8402 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8403};
8404#endif /* CONFIG_NFS_V4_1 */
8405
97dc1359
TM		 8406static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8407 .minor_version = 0,
39c6daae
TM		 8408 .init_caps = NFS_CAP_READDIRPLUS
8409 | NFS_CAP_ATOMIC_OPEN
8410 | NFS_CAP_CHANGE_ATTR
8411 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8412 .init_client = nfs40_init_client,
8413 .shutdown_client = nfs40_shutdown_client,
36281caa 8414 .match_stateid = nfs4_match_stateid,
fca78d6d 8415 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8416 .free_lock_state = nfs4_release_lockowner,
9915ea7e 8417 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8418 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8419 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8420 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8421 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8422};
8423
8424#if defined(CONFIG_NFS_V4_1)
8425static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8426 .minor_version = 1,
39c6daae
TM		 8427 .init_caps = NFS_CAP_READDIRPLUS
8428 | NFS_CAP_ATOMIC_OPEN
8429 | NFS_CAP_CHANGE_ATTR
3b66486c 8430 | NFS_CAP_POSIX_LOCK
49f9a0fa 8431 | NFS_CAP_STATEID_NFSV41
e983120e 8432 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8433 .init_client = nfs41_init_client,
8434 .shutdown_client = nfs41_shutdown_client,
36281caa 8435 .match_stateid = nfs41_match_stateid,
fca78d6d 8436 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8437 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8438 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8439 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8440 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8441 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8442 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8443};
8444#endif
8445
42c2c424
SD		 8446#if defined(CONFIG_NFS_V4_2)
8447static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8448 .minor_version = 2,
7017310a
BS		 8449 .init_caps = NFS_CAP_READDIRPLUS
8450 | NFS_CAP_ATOMIC_OPEN
8451 | NFS_CAP_CHANGE_ATTR
8452 | NFS_CAP_POSIX_LOCK
8453 | NFS_CAP_STATEID_NFSV41
e983120e 8454 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8455 | NFS_CAP_ALLOCATE
624bd5b7 8456 | NFS_CAP_DEALLOCATE
e983120e 8457 | NFS_CAP_SEEK,
abf79bb3
CL		 8458 .init_client = nfs41_init_client,
8459 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8460 .match_stateid = nfs41_match_stateid,
8461 .find_root_sec = nfs41_find_root_sec,
7017310a 8462 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8463 .call_sync_ops = &nfs41_call_sync_ops,
42c2c424
SD		 8464 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8465 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8466 .state_renewal_ops = &nfs41_state_renewal_ops,
8467};
8468#endif
8469
97dc1359
TM		 8470const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8471 [0] = &nfs_v4_0_minor_ops,
8472#if defined(CONFIG_NFS_V4_1)
8473 [1] = &nfs_v4_1_minor_ops,
8474#endif
42c2c424
SD		 8475#if defined(CONFIG_NFS_V4_2)
8476 [2] = &nfs_v4_2_minor_ops,
8477#endif
97dc1359
TM		 8478};
8479
17f26b12 8480static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8481 .create = nfs_create,
8482 .lookup = nfs_lookup,
8483 .atomic_open = nfs_atomic_open,
8484 .link = nfs_link,
8485 .unlink = nfs_unlink,
8486 .symlink = nfs_symlink,
8487 .mkdir = nfs_mkdir,
8488 .rmdir = nfs_rmdir,
8489 .mknod = nfs_mknod,
8490 .rename = nfs_rename,
8491 .permission = nfs_permission,
8492 .getattr = nfs_getattr,
8493 .setattr = nfs_setattr,
8494 .getxattr = generic_getxattr,
8495 .setxattr = generic_setxattr,
8496 .listxattr = generic_listxattr,
8497 .removexattr = generic_removexattr,
8498};
8499
92e1d5be 8500static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8501 .permission = nfs_permission,
8502 .getattr = nfs_getattr,
8503 .setattr = nfs_setattr,
64c2ce8b
AK		 8504 .getxattr = generic_getxattr,
8505 .setxattr = generic_setxattr,
8506 .listxattr = generic_listxattr,
8507 .removexattr = generic_removexattr,
6b3b5496
BF		 8508};
8509
509de811 8510const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8511 .version = 4, /* protocol version */
8512 .dentry_ops = &nfs4_dentry_operations,
8513 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8514 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8515 .file_ops = &nfs4_file_operations,
1da177e4 8516 .getroot = nfs4_proc_get_root,
281cad46 8517 .submount = nfs4_submount,
ff9099f2 8518 .try_mount = nfs4_try_mount,
1da177e4
LT		 8519 .getattr = nfs4_proc_getattr,
8520 .setattr = nfs4_proc_setattr,
8521 .lookup = nfs4_proc_lookup,
8522 .access = nfs4_proc_access,
8523 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8524 .create = nfs4_proc_create,
8525 .remove = nfs4_proc_remove,
8526 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8527 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8528 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8529 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8530 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8531 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8532 .link = nfs4_proc_link,
8533 .symlink = nfs4_proc_symlink,
8534 .mkdir = nfs4_proc_mkdir,
8535 .rmdir = nfs4_proc_remove,
8536 .readdir = nfs4_proc_readdir,
8537 .mknod = nfs4_proc_mknod,
8538 .statfs = nfs4_proc_statfs,
8539 .fsinfo = nfs4_proc_fsinfo,
8540 .pathconf = nfs4_proc_pathconf,
e9326dca 8541 .set_capabilities = nfs4_server_capabilities,
1da177e4 8542 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8543 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8544 .read_setup = nfs4_proc_read_setup,
ec06c096 8545 .read_done = nfs4_read_done,
1da177e4 8546 .write_setup = nfs4_proc_write_setup,
788e7a89 8547 .write_done = nfs4_write_done,
1da177e4 8548 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8549 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8550 .commit_done = nfs4_commit_done,
1da177e4 8551 .lock = nfs4_proc_lock,
e50a1c2e 8552 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8553 .close_context = nfs4_close_context,
2b484297 8554 .open_context = nfs4_atomic_open,
011e2a7f 8555 .have_delegation = nfs4_have_delegation,
57ec14c5 8556 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8557 .alloc_client = nfs4_alloc_client,
45a52a02 8558 .init_client = nfs4_init_client,
cdb7eced 8559 .free_client = nfs4_free_client,
1179acc6
BS		 8560 .create_server = nfs4_create_server,
8561 .clone_server = nfs_clone_server,
1da177e4
LT		 8562};
8563
64c2ce8b
AK		 8564static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8565 .prefix = XATTR_NAME_NFSV4_ACL,
8566 .list = nfs4_xattr_list_nfs4_acl,
8567 .get = nfs4_xattr_get_nfs4_acl,
8568 .set = nfs4_xattr_set_nfs4_acl,
8569};
8570
8571const struct xattr_handler *nfs4_xattr_handlers[] = {
8572 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8573#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8574 &nfs4_xattr_nfs4_label_handler,
8575#endif
64c2ce8b
AK		 8576 NULL
8577};
8578
1da177e4
LT		 8579/*
8580 * Local variables:
8581 * c-basic-offset: 8
8582 * End:
8583 */
Linux 6.x block layer and io_uring tree(s)