projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
NFSv4.1: Fix client id trunking on Linux
[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;
15c831bf 1120 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 1121 return 0;
d25be546
TM		 1122 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1123 return 0;
b7391f44 1124 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1125 return 1;
1126}
1127
dc0b027d 1128static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1129{
dc0b027d 1130 switch (fmode) {
e7616923
TM		 1131 case FMODE_WRITE:
1132 state->n_wronly++;
1133 break;
1134 case FMODE_READ:
1135 state->n_rdonly++;
1136 break;
1137 case FMODE_READ|FMODE_WRITE:
1138 state->n_rdwr++;
1139 }
dc0b027d 1140 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1141}
1142
4f14c194
TM		 1143static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1144{
1145 struct nfs_client *clp = state->owner->so_server->nfs_client;
1146 bool need_recover = false;
1147
1148 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1149 need_recover = true;
1150 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1151 need_recover = true;
1152 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1153 need_recover = true;
1154 if (need_recover)
1155 nfs4_state_mark_reclaim_nograce(clp, state);
1156}
1157
e999e80e
TM		 1158static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1159 nfs4_stateid *stateid)
1160{
1161 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1162 return true;
4f14c194
TM		 1163 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1164 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1165 return true;
4f14c194 1166 }
e999e80e
TM		 1167 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1168 return true;
1169 return false;
1170}
1171
226056c5
TM		 1172static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1173 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1174{
226056c5
TM		 1175 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1176 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1177 case FMODE_WRITE:
1178 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1179 break;
1180 case FMODE_READ:
1181 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1182 break;
1183 case 0:
1184 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1185 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1186 clear_bit(NFS_OPEN_STATE, &state->flags);
1187 }
1188 if (stateid == NULL)
1189 return;
1190 if (!nfs_need_update_open_stateid(state, stateid))
1191 return;
003707c7 1192 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1193 nfs4_stateid_copy(&state->stateid, stateid);
1194 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1195}
1196
1197static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1198{
1199 write_seqlock(&state->seqlock);
1200 nfs_clear_open_stateid_locked(state, stateid, fmode);
1201 write_sequnlock(&state->seqlock);
4f14c194
TM		 1202 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1203 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1204}
1205
dc0b027d 1206static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1207{
dc0b027d 1208 switch (fmode) {
003707c7
TM		 1209 case FMODE_READ:
1210 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1211 break;
1212 case FMODE_WRITE:
1213 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1214 break;
1215 case FMODE_READ|FMODE_WRITE:
1216 set_bit(NFS_O_RDWR_STATE, &state->flags);
1217 }
e999e80e
TM		 1218 if (!nfs_need_update_open_stateid(state, stateid))
1219 return;
1220 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1221 nfs4_stateid_copy(&state->stateid, stateid);
1222 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1223}
1224
dc0b027d 1225static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1226{
8bda4e4c
TM		 1227 /*
1228 * Protect the call to nfs4_state_set_mode_locked and
1229 * serialise the stateid update
1230 */
1231 write_seqlock(&state->seqlock);
003707c7 1232 if (deleg_stateid != NULL) {
f597c537 1233 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1234 set_bit(NFS_DELEGATED_STATE, &state->flags);
1235 }
1236 if (open_stateid != NULL)
dc0b027d 1237 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1238 write_sequnlock(&state->seqlock);
1239 spin_lock(&state->owner->so_lock);
dc0b027d 1240 update_open_stateflags(state, fmode);
ec073428 1241 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1242}
1243
dc0b027d 1244static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1245{
1246 struct nfs_inode *nfsi = NFS_I(state->inode);
1247 struct nfs_delegation *deleg_cur;
1248 int ret = 0;
1249
dc0b027d 1250 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1251
1252 rcu_read_lock();
1253 deleg_cur = rcu_dereference(nfsi->delegation);
1254 if (deleg_cur == NULL)
1255 goto no_delegation;
1256
1257 spin_lock(&deleg_cur->lock);
17f26b12 1258 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1259 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1260 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1261 goto no_delegation_unlock;
1262
1263 if (delegation == NULL)
1264 delegation = &deleg_cur->stateid;
f597c537 1265 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1266 goto no_delegation_unlock;
1267
b7391f44 1268 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1269 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1270 ret = 1;
1271no_delegation_unlock:
1272 spin_unlock(&deleg_cur->lock);
1273no_delegation:
1274 rcu_read_unlock();
1275
1276 if (!ret && open_stateid != NULL) {
dc0b027d 1277 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1278 ret = 1;
1279 }
4f14c194
TM		 1280 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1281 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1282
1283 return ret;
1284}
1285
1286
dc0b027d 1287static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1288{
1289 struct nfs_delegation *delegation;
1290
1291 rcu_read_lock();
1292 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1293 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1294 rcu_read_unlock();
1295 return;
1296 }
1297 rcu_read_unlock();
57ec14c5 1298 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1299}
1300
6ee41268 1301static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1302{
1303 struct nfs4_state *state = opendata->state;
1304 struct nfs_inode *nfsi = NFS_I(state->inode);
1305 struct nfs_delegation *delegation;
f448badd 1306 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1307 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1308 nfs4_stateid stateid;
1309 int ret = -EAGAIN;
1310
aac00a8d 1311 for (;;) {
61beef75 1312 spin_lock(&state->owner->so_lock);
dc0b027d 1313 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1314 update_open_stateflags(state, fmode);
6ee41268 1315 spin_unlock(&state->owner->so_lock);
61beef75 1316 goto out_return_state;
6ee41268 1317 }
61beef75 1318 spin_unlock(&state->owner->so_lock);
34310430
TM		 1319 rcu_read_lock();
1320 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1321 if (!can_open_delegated(delegation, fmode)) {
34310430 1322 rcu_read_unlock();
aac00a8d 1323 break;
34310430 1324 }
aac00a8d 1325 /* Save the delegation */
f597c537 1326 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1327 rcu_read_unlock();
fa332941 1328 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1329 if (!opendata->is_recover) {
1330 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1331 if (ret != 0)
1332 goto out;
1333 }
aac00a8d 1334 ret = -EAGAIN;
34310430
TM		 1335
1336 /* Try to update the stateid using the delegation */
dc0b027d 1337 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1338 goto out_return_state;
aac00a8d 1339 }
aac00a8d
TM		 1340out:
1341 return ERR_PTR(ret);
1342out_return_state:
1343 atomic_inc(&state->count);
1344 return state;
1345}
1346
e23008ec
AA		 1347static void
1348nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1349{
1350 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1351 struct nfs_delegation *delegation;
1352 int delegation_flags = 0;
1353
1354 rcu_read_lock();
1355 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1356 if (delegation)
1357 delegation_flags = delegation->flags;
1358 rcu_read_unlock();
1359 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1360 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1361 "returning a delegation for "
1362 "OPEN(CLAIM_DELEGATE_CUR)\n",
1363 clp->cl_hostname);
1364 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1365 nfs_inode_set_delegation(state->inode,
1366 data->owner->so_cred,
1367 &data->o_res);
1368 else
1369 nfs_inode_reclaim_delegation(state->inode,
1370 data->owner->so_cred,
1371 &data->o_res);
1372}
1373
1374/*
1375 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1376 * and update the nfs4_state.
1377 */
1378static struct nfs4_state *
1379_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1380{
1381 struct inode *inode = data->state->inode;
1382 struct nfs4_state *state = data->state;
1383 int ret;
1384
d2bfda2e
WAA		 1385 if (!data->rpc_done) {
1386 if (data->rpc_status) {
1387 ret = data->rpc_status;
1388 goto err;
1389 }
1390 /* cached opens have already been processed */
1391 goto update;
e23008ec
AA		 1392 }
1393
e23008ec
AA		 1394 ret = nfs_refresh_inode(inode, &data->f_attr);
1395 if (ret)
1396 goto err;
1397
1398 if (data->o_res.delegation_type != 0)
1399 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1400update:
e23008ec
AA		 1401 update_open_stateid(state, &data->o_res.stateid, NULL,
1402 data->o_arg.fmode);
d49f042a 1403 atomic_inc(&state->count);
e23008ec
AA		 1404
1405 return state;
1406err:
1407 return ERR_PTR(ret);
1408
1409}
1410
1411static struct nfs4_state *
1412_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1413{
1414 struct inode *inode;
1415 struct nfs4_state *state = NULL;
1b370bc2 1416 int ret;
24ac23ab 1417
aac00a8d 1418 if (!data->rpc_done) {
6ee41268 1419 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1420 goto out;
1421 }
1422
1b370bc2 1423 ret = -EAGAIN;
24ac23ab 1424 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1425 goto err;
1775fd3e 1426 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1427 ret = PTR_ERR(inode);
03f28e3a 1428 if (IS_ERR(inode))
1b370bc2
TM		 1429 goto err;
1430 ret = -ENOMEM;
24ac23ab
TM		 1431 state = nfs4_get_open_state(inode, data->owner);
1432 if (state == NULL)
1b370bc2 1433 goto err_put_inode;
e23008ec
AA		 1434 if (data->o_res.delegation_type != 0)
1435 nfs4_opendata_check_deleg(data, state);
34310430 1436 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1437 data->o_arg.fmode);
24ac23ab 1438 iput(inode);
aac00a8d 1439out:
7aa262b5 1440 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1441 return state;
1b370bc2
TM		 1442err_put_inode:
1443 iput(inode);
1444err:
1445 return ERR_PTR(ret);
24ac23ab
TM		 1446}
1447
e23008ec
AA		 1448static struct nfs4_state *
1449nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1450{
1451 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1452 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1453 return _nfs4_opendata_to_nfs4_state(data);
1454}
1455
864472e9
TM		 1456static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1457{
1458 struct nfs_inode *nfsi = NFS_I(state->inode);
1459 struct nfs_open_context *ctx;
1460
1461 spin_lock(&state->inode->i_lock);
1462 list_for_each_entry(ctx, &nfsi->open_files, list) {
1463 if (ctx->state != state)
1464 continue;
1465 get_nfs_open_context(ctx);
1466 spin_unlock(&state->inode->i_lock);
1467 return ctx;
1468 }
1469 spin_unlock(&state->inode->i_lock);
1470 return ERR_PTR(-ENOENT);
1471}
1472
4a1c0893
TM		 1473static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1474 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1475{
1476 struct nfs4_opendata *opendata;
1477
4a1c0893 1478 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1479 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1480 if (opendata == NULL)
1481 return ERR_PTR(-ENOMEM);
1482 opendata->state = state;
1483 atomic_inc(&state->count);
1484 return opendata;
1485}
1486
dc0b027d 1487static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1488{
2ced46c2 1489 struct nfs4_state *newstate;
864472e9
TM		 1490 int ret;
1491
dc0b027d
TM		 1492 opendata->o_arg.open_flags = 0;
1493 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1494 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1495 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1496 nfs4_init_opendata_res(opendata);
b257957e 1497 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1498 if (ret != 0)
1499 return ret;
2ced46c2 1500 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1501 if (IS_ERR(newstate))
1502 return PTR_ERR(newstate);
643168c2 1503 nfs4_close_state(newstate, fmode);
2ced46c2 1504 *res = newstate;
864472e9
TM		 1505 return 0;
1506}
1507
1508static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1509{
864472e9 1510 struct nfs4_state *newstate;
864472e9
TM		 1511 int ret;
1512
4f14c194
TM		 1513 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1514 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1515 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1516 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1517 /* memory barrier prior to reading state->n_* */
2ced46c2 1518 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1519 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1520 smp_rmb();
1521 if (state->n_rdwr != 0) {
2ced46c2 1522 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1523 if (ret != 0)
1524 return ret;
2ced46c2
TM		 1525 if (newstate != state)
1526 return -ESTALE;
864472e9
TM		 1527 }
1528 if (state->n_wronly != 0) {
2ced46c2 1529 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1530 if (ret != 0)
1531 return ret;
2ced46c2
TM		 1532 if (newstate != state)
1533 return -ESTALE;
864472e9
TM		 1534 }
1535 if (state->n_rdonly != 0) {
2ced46c2 1536 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1537 if (ret != 0)
1538 return ret;
2ced46c2
TM		 1539 if (newstate != state)
1540 return -ESTALE;
864472e9 1541 }
1ac7e2fd
TM		 1542 /*
1543 * We may have performed cached opens for all three recoveries.
1544 * Check if we need to update the current stateid.
1545 */
1546 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1547 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1548 write_seqlock(&state->seqlock);
1ac7e2fd 1549 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1550 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1551 write_sequnlock(&state->seqlock);
1ac7e2fd 1552 }
864472e9
TM		 1553 return 0;
1554}
1555
1da177e4
LT		 1556/*
1557 * OPEN_RECLAIM:
1558 * reclaim state on the server after a reboot.
1da177e4 1559 */
539cd03a 1560static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1561{
1ac7e2fd 1562 struct nfs_delegation *delegation;
864472e9 1563 struct nfs4_opendata *opendata;
dc0b027d 1564 fmode_t delegation_type = 0;
1da177e4
LT		 1565 int status;
1566
4a1c0893
TM		 1567 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1568 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1569 if (IS_ERR(opendata))
1570 return PTR_ERR(opendata);
1ac7e2fd
TM		 1571 rcu_read_lock();
1572 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1573 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1574 delegation_type = delegation->type;
1ac7e2fd 1575 rcu_read_unlock();
864472e9
TM		 1576 opendata->o_arg.u.delegation_type = delegation_type;
1577 status = nfs4_open_recover(opendata, state);
c6d00e63 1578 nfs4_opendata_put(opendata);
1da177e4
LT		 1579 return status;
1580}
1581
539cd03a 1582static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1583{
1584 struct nfs_server *server = NFS_SERVER(state->inode);
1585 struct nfs4_exception exception = { };
1586 int err;
1587 do {
539cd03a 1588 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1589 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1590 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1591 continue;
168667c4 1592 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1593 break;
1594 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1595 } while (exception.retry);
1596 return err;
1597}
1598
864472e9
TM		 1599static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1600{
1601 struct nfs_open_context *ctx;
1602 int ret;
1603
1604 ctx = nfs4_state_find_open_context(state);
1605 if (IS_ERR(ctx))
91876b13 1606 return -EAGAIN;
539cd03a 1607 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1608 put_nfs_open_context(ctx);
1609 return ret;
1610}
1611
db4f2e63 1612static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1613{
be76b5b6
TM		 1614 switch (err) {
1615 default:
1616 printk(KERN_ERR "NFS: %s: unhandled error "
1617 "%d.\n", __func__, err);
1618 case 0:
1619 case -ENOENT:
1620 case -ESTALE:
1621 break;
1622 case -NFS4ERR_BADSESSION:
1623 case -NFS4ERR_BADSLOT:
1624 case -NFS4ERR_BAD_HIGH_SLOT:
1625 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1626 case -NFS4ERR_DEADSESSION:
1627 set_bit(NFS_DELEGATED_STATE, &state->flags);
1628 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1629 return -EAGAIN;
1630 case -NFS4ERR_STALE_CLIENTID:
1631 case -NFS4ERR_STALE_STATEID:
1632 set_bit(NFS_DELEGATED_STATE, &state->flags);
1633 case -NFS4ERR_EXPIRED:
1634 /* Don't recall a delegation if it was lost */
1635 nfs4_schedule_lease_recovery(server->nfs_client);
1636 return -EAGAIN;
352297b9
CL		 1637 case -NFS4ERR_MOVED:
1638 nfs4_schedule_migration_recovery(server);
1639 return -EAGAIN;
8ef2f8d4
CL		 1640 case -NFS4ERR_LEASE_MOVED:
1641 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1642 return -EAGAIN;
be76b5b6
TM		 1643 case -NFS4ERR_DELEG_REVOKED:
1644 case -NFS4ERR_ADMIN_REVOKED:
1645 case -NFS4ERR_BAD_STATEID:
db4f2e63 1646 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1647 nfs_inode_find_state_and_recover(state->inode,
1648 stateid);
1649 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1650 return -EAGAIN;
be76b5b6
TM		 1651 case -NFS4ERR_DELAY:
1652 case -NFS4ERR_GRACE:
1653 set_bit(NFS_DELEGATED_STATE, &state->flags);
1654 ssleep(1);
1655 return -EAGAIN;
db4f2e63
TM		 1656 case -ENOMEM:
1657 case -NFS4ERR_DENIED:
1658 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1659 return 0;
be76b5b6 1660 }
1da177e4
LT		 1661 return err;
1662}
1663
db4f2e63
TM		 1664int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1665{
1666 struct nfs_server *server = NFS_SERVER(state->inode);
1667 struct nfs4_opendata *opendata;
1668 int err;
1669
1670 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1671 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1672 if (IS_ERR(opendata))
1673 return PTR_ERR(opendata);
1674 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1675 err = nfs4_open_recover(opendata, state);
1676 nfs4_opendata_put(opendata);
1677 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1678}
1679
be05c860
CL		 1680static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1681{
1682 struct nfs4_opendata *data = calldata;
1683
17ead6c8
TM		 1684 nfs40_setup_sequence(data->o_arg.server, &data->c_arg.seq_args,
1685 &data->c_res.seq_res, task);
be05c860
CL		 1686}
1687
cdd4e68b
TM		 1688static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1689{
1690 struct nfs4_opendata *data = calldata;
1691
17ead6c8 1692 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1693
cdd4e68b 1694 data->rpc_status = task->tk_status;
26e976a8 1695 if (data->rpc_status == 0) {
f597c537 1696 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1697 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1698 renew_lease(data->o_res.server, data->timestamp);
3e309914 1699 data->rpc_done = 1;
26e976a8 1700 }
cdd4e68b
TM		 1701}
1702
1703static void nfs4_open_confirm_release(void *calldata)
1704{
1705 struct nfs4_opendata *data = calldata;
1706 struct nfs4_state *state = NULL;
1707
1708 /* If this request hasn't been cancelled, do nothing */
1709 if (data->cancelled == 0)
1710 goto out_free;
1711 /* In case of error, no cleanup! */
3e309914 1712 if (!data->rpc_done)
cdd4e68b 1713 goto out_free;
cdd4e68b 1714 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1715 if (!IS_ERR(state))
643168c2 1716 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1717out_free:
c6d00e63 1718 nfs4_opendata_put(data);
cdd4e68b
TM		 1719}
1720
1721static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1722 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1723 .rpc_call_done = nfs4_open_confirm_done,
1724 .rpc_release = nfs4_open_confirm_release,
1725};
1726
1727/*
1728 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1729 */
1730static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1731{
1732 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1733 struct rpc_task *task;
5138fde0
TM		 1734 struct rpc_message msg = {
1735 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1736 .rpc_argp = &data->c_arg,
1737 .rpc_resp = &data->c_res,
1738 .rpc_cred = data->owner->so_cred,
1739 };
c970aa85
TM		 1740 struct rpc_task_setup task_setup_data = {
1741 .rpc_client = server->client,
5138fde0 1742 .rpc_message = &msg,
c970aa85
TM		 1743 .callback_ops = &nfs4_open_confirm_ops,
1744 .callback_data = data,
101070ca 1745 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1746 .flags = RPC_TASK_ASYNC,
1747 };
1da177e4
LT		 1748 int status;
1749
17ead6c8 1750 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1751 kref_get(&data->kref);
3e309914
TM		 1752 data->rpc_done = 0;
1753 data->rpc_status = 0;
5138fde0 1754 data->timestamp = jiffies;
c970aa85 1755 task = rpc_run_task(&task_setup_data);
7a1218a2 1756 if (IS_ERR(task))
cdd4e68b 1757 return PTR_ERR(task);
cdd4e68b
TM		 1758 status = nfs4_wait_for_completion_rpc_task(task);
1759 if (status != 0) {
1760 data->cancelled = 1;
1761 smp_wmb();
1762 } else
1763 status = data->rpc_status;
e6b3c4db 1764 rpc_put_task(task);
1da177e4
LT		 1765 return status;
1766}
1767
24ac23ab 1768static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1769{
24ac23ab
TM		 1770 struct nfs4_opendata *data = calldata;
1771 struct nfs4_state_owner *sp = data->owner;
549b19cc 1772 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1773
24ac23ab 1774 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1775 goto out_wait;
aac00a8d
TM		 1776 /*
1777 * Check if we still need to send an OPEN call, or if we can use
1778 * a delegation instead.
1779 */
1780 if (data->state != NULL) {
1781 struct nfs_delegation *delegation;
1782
dc0b027d 1783 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1784 goto out_no_action;
aac00a8d
TM		 1785 rcu_read_lock();
1786 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1787 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1788 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1789 can_open_delegated(delegation, data->o_arg.fmode))
1790 goto unlock_no_action;
aac00a8d
TM		 1791 rcu_read_unlock();
1792 }
95b72eb0 1793 /* Update client id. */
549b19cc 1794 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1795 switch (data->o_arg.claim) {
1796 case NFS4_OPEN_CLAIM_PREVIOUS:
1797 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1798 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1799 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1800 case NFS4_OPEN_CLAIM_FH:
1801 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1802 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1803 }
26e976a8 1804 data->timestamp = jiffies;
035168ab 1805 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1806 &data->o_arg.seq_args,
2240a9e2
TM		 1807 &data->o_res.seq_res,
1808 task) != 0)
1809 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1810
1811 /* Set the create mode (note dependency on the session type) */
1812 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1813 if (data->o_arg.open_flags & O_EXCL) {
1814 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1815 if (nfs4_has_persistent_session(clp))
1816 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1817 else if (clp->cl_mvops->minor_version > 0)
1818 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1819 }
6ee41268 1820 return;
652f89f6
TM		 1821unlock_no_action:
1822 rcu_read_unlock();
6ee41268
TM		 1823out_no_action:
1824 task->tk_action = NULL;
c8da19b9 1825out_wait:
b75ad4cd 1826 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1827}
1828
24ac23ab
TM		 1829static void nfs4_open_done(struct rpc_task *task, void *calldata)
1830{
1831 struct nfs4_opendata *data = calldata;
1da177e4 1832
24ac23ab 1833 data->rpc_status = task->tk_status;
d898528c 1834
14516c3a
TM		 1835 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1836 return;
d898528c 1837
24ac23ab 1838 if (task->tk_status == 0) {
807d66d8
TM		 1839 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1840 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1841 case S_IFREG:
1842 break;
1843 case S_IFLNK:
24ac23ab 1844 data->rpc_status = -ELOOP;
6f926b5b
TM		 1845 break;
1846 case S_IFDIR:
24ac23ab 1847 data->rpc_status = -EISDIR;
6f926b5b
TM		 1848 break;
1849 default:
24ac23ab 1850 data->rpc_status = -ENOTDIR;
807d66d8 1851 }
6f926b5b 1852 }
26e976a8 1853 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1854 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1855 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1856 }
3e309914 1857 data->rpc_done = 1;
24ac23ab 1858}
6f926b5b 1859
24ac23ab
TM		 1860static void nfs4_open_release(void *calldata)
1861{
1862 struct nfs4_opendata *data = calldata;
1863 struct nfs4_state *state = NULL;
1864
1865 /* If this request hasn't been cancelled, do nothing */
1866 if (data->cancelled == 0)
1867 goto out_free;
1868 /* In case of error, no cleanup! */
3e309914 1869 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1870 goto out_free;
1871 /* In case we need an open_confirm, no cleanup! */
1872 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1873 goto out_free;
24ac23ab 1874 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1875 if (!IS_ERR(state))
643168c2 1876 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1877out_free:
c6d00e63 1878 nfs4_opendata_put(data);
24ac23ab
TM		 1879}
1880
1881static const struct rpc_call_ops nfs4_open_ops = {
1882 .rpc_call_prepare = nfs4_open_prepare,
1883 .rpc_call_done = nfs4_open_done,
1884 .rpc_release = nfs4_open_release,
1885};
1886
b257957e 1887static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1888{
1889 struct inode *dir = data->dir->d_inode;
1890 struct nfs_server *server = NFS_SERVER(dir);
1891 struct nfs_openargs *o_arg = &data->o_arg;
1892 struct nfs_openres *o_res = &data->o_res;
1893 struct rpc_task *task;
5138fde0
TM		 1894 struct rpc_message msg = {
1895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1896 .rpc_argp = o_arg,
1897 .rpc_resp = o_res,
1898 .rpc_cred = data->owner->so_cred,
1899 };
c970aa85
TM		 1900 struct rpc_task_setup task_setup_data = {
1901 .rpc_client = server->client,
5138fde0 1902 .rpc_message = &msg,
c970aa85
TM		 1903 .callback_ops = &nfs4_open_ops,
1904 .callback_data = data,
101070ca 1905 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1906 .flags = RPC_TASK_ASYNC,
1907 };
24ac23ab
TM		 1908 int status;
1909
a9c92d6b 1910 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1911 kref_get(&data->kref);
3e309914
TM		 1912 data->rpc_done = 0;
1913 data->rpc_status = 0;
2ced46c2 1914 data->cancelled = 0;
bdeca1b7
TM		 1915 data->is_recover = 0;
1916 if (isrecover) {
8fe72bac 1917 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1918 data->is_recover = 1;
1919 }
c970aa85 1920 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1921 if (IS_ERR(task))
1922 return PTR_ERR(task);
1923 status = nfs4_wait_for_completion_rpc_task(task);
1924 if (status != 0) {
1925 data->cancelled = 1;
1926 smp_wmb();
1927 } else
1928 status = data->rpc_status;
1929 rpc_put_task(task);
1930
1931 return status;
1932}
1933
1934static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1935{
1936 struct inode *dir = data->dir->d_inode;
1937 struct nfs_openres *o_res = &data->o_res;
1938 int status;
1939
1940 status = nfs4_run_open_task(data, 1);
1941 if (status != 0 || !data->rpc_done)
1942 return status;
1943
6926afd1
TM		 1944 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1945
b257957e
AB		 1946 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1947 status = _nfs4_proc_open_confirm(data);
1948 if (status != 0)
1949 return status;
1950 }
1951
1952 return status;
1953}
1954
f3792d63
TM		 1955/*
1956 * Additional permission checks in order to distinguish between an
1957 * open for read, and an open for execute. This works around the
1958 * fact that NFSv4 OPEN treats read and execute permissions as being
1959 * the same.
1960 * Note that in the non-execute case, we want to turn off permission
1961 * checking if we just created a new file (POSIX open() semantics).
1962 */
6168f62c
WAA		 1963static int nfs4_opendata_access(struct rpc_cred *cred,
1964 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1965 struct nfs4_state *state, fmode_t fmode,
1966 int openflags)
6168f62c
WAA		 1967{
1968 struct nfs_access_entry cache;
1969 u32 mask;
1970
1971 /* access call failed or for some reason the server doesn't
1972 * support any access modes -- defer access call until later */
1973 if (opendata->o_res.access_supported == 0)
1974 return 0;
1975
1976 mask = 0;
f3792d63
TM		 1977 /*
1978 * Use openflags to check for exec, because fmode won't
1979 * always have FMODE_EXEC set when file open for exec.
1980 */
f8d9a897
WAA		 1981 if (openflags & __FMODE_EXEC) {
1982 /* ONLY check for exec rights */
1983 mask = MAY_EXEC;
f3792d63 1984 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 1985 mask = MAY_READ;
6168f62c
WAA		 1986
1987 cache.cred = cred;
1988 cache.jiffies = jiffies;
1989 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1990 nfs_access_add_cache(state->inode, &cache);
1991
bbd3a8ee 1992 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1993 return 0;
1994
1995 /* even though OPEN succeeded, access is denied. Close the file */
1996 nfs4_close_state(state, fmode);
998f40b5 1997 return -EACCES;
6168f62c
WAA		 1998}
1999
b257957e
AB		 2000/*
2001 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2002 */
2003static int _nfs4_proc_open(struct nfs4_opendata *data)
2004{
2005 struct inode *dir = data->dir->d_inode;
2006 struct nfs_server *server = NFS_SERVER(dir);
2007 struct nfs_openargs *o_arg = &data->o_arg;
2008 struct nfs_openres *o_res = &data->o_res;
2009 int status;
2010
2011 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2012 if (!data->rpc_done)
2013 return status;
2014 if (status != 0) {
2015 if (status == -NFS4ERR_BADNAME &&
2016 !(o_arg->open_flags & O_CREAT))
2017 return -ENOENT;
24ac23ab 2018 return status;
08ef7bd3 2019 }
24ac23ab 2020
6926afd1
TM		 2021 nfs_fattr_map_and_free_names(server, &data->f_attr);
2022
5bc2afc2 2023 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2024 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2025 if (o_arg->open_flags & O_EXCL)
2026 data->file_created = 1;
2027 else if (o_res->cinfo.before != o_res->cinfo.after)
2028 data->file_created = 1;
2029 }
0df5dd4a
TM		 2030 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2031 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2032 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2033 status = _nfs4_proc_open_confirm(data);
1da177e4 2034 if (status != 0)
24ac23ab 2035 return status;
1da177e4
LT		 2036 }
2037 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2038 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2039 return 0;
1da177e4
LT		 2040}
2041
d83217c1
AA		 2042static int nfs4_recover_expired_lease(struct nfs_server *server)
2043{
2044 return nfs4_client_recover_expired_lease(server->nfs_client);
2045}
2046
1da177e4
LT		 2047/*
2048 * OPEN_EXPIRED:
2049 * reclaim state on the server after a network partition.
2050 * Assumes caller holds the appropriate lock
2051 */
539cd03a 2052static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2053{
e56e0b78 2054 struct nfs4_opendata *opendata;
864472e9 2055 int ret;
1da177e4 2056
4a1c0893 2057 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2058 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2059 if (IS_ERR(opendata))
2060 return PTR_ERR(opendata);
864472e9 2061 ret = nfs4_open_recover(opendata, state);
35d05778 2062 if (ret == -ESTALE)
3d4ff43d 2063 d_drop(ctx->dentry);
c6d00e63 2064 nfs4_opendata_put(opendata);
864472e9 2065 return ret;
1da177e4
LT		 2066}
2067
a9ed2e25 2068static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2069{
539cd03a 2070 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2071 struct nfs4_exception exception = { };
2072 int err;
2073
2074 do {
539cd03a 2075 err = _nfs4_open_expired(ctx, state);
42113a75 2076 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2077 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2078 continue;
a9ed2e25
TM		 2079 switch (err) {
2080 default:
2081 goto out;
2082 case -NFS4ERR_GRACE:
2083 case -NFS4ERR_DELAY:
2084 nfs4_handle_exception(server, err, &exception);
2085 err = 0;
2086 }
202b50dc 2087 } while (exception.retry);
a9ed2e25 2088out:
202b50dc
TM		 2089 return err;
2090}
2091
1da177e4
LT		 2092static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2093{
1da177e4 2094 struct nfs_open_context *ctx;
864472e9 2095 int ret;
1da177e4 2096
864472e9
TM		 2097 ctx = nfs4_state_find_open_context(state);
2098 if (IS_ERR(ctx))
91876b13 2099 return -EAGAIN;
539cd03a 2100 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2101 put_nfs_open_context(ctx);
2102 return ret;
1da177e4
LT		 2103}
2104
4dfd4f7a
TM		 2105static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2106{
2107 nfs_remove_bad_delegation(state->inode);
2108 write_seqlock(&state->seqlock);
2109 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2110 write_sequnlock(&state->seqlock);
2111 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2112}
2113
2114static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2115{
2116 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2117 nfs_finish_clear_delegation_stateid(state);
2118}
2119
2120static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2121{
2122 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2123 nfs40_clear_delegation_stateid(state);
2124 return nfs4_open_expired(sp, state);
2125}
2126
f062eb6c 2127#if defined(CONFIG_NFS_V4_1)
0c116cad 2128static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2129{
f062eb6c 2130 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2131 nfs4_stateid stateid;
ab7cb0df 2132 struct nfs_delegation *delegation;
0c116cad
TM		 2133 struct rpc_cred *cred;
2134 int status;
3e60ffdd 2135
ab7cb0df
TM		 2136 /* Get the delegation credential for use by test/free_stateid */
2137 rcu_read_lock();
2138 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2139 if (delegation == NULL) {
ab7cb0df 2140 rcu_read_unlock();
0c116cad
TM		 2141 return;
2142 }
2143
2144 nfs4_stateid_copy(&stateid, &delegation->stateid);
2145 cred = get_rpccred(delegation->cred);
2146 rcu_read_unlock();
2147 status = nfs41_test_stateid(server, &stateid, cred);
2148 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2149
3e60ffdd
CL		 2150 if (status != NFS_OK) {
2151 /* Free the stateid unless the server explicitly
2152 * informs us the stateid is unrecognized. */
2153 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2154 nfs41_free_stateid(server, &stateid, cred);
2155 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2156 }
ab7cb0df 2157
0c116cad 2158 put_rpccred(cred);
3e60ffdd
CL		 2159}
2160
2161/**
2162 * nfs41_check_open_stateid - possibly free an open stateid
2163 *
2164 * @state: NFSv4 state for an inode
2165 *
2166 * Returns NFS_OK if recovery for this stateid is now finished.
2167 * Otherwise a negative NFS4ERR value is returned.
2168 */
2169static int nfs41_check_open_stateid(struct nfs4_state *state)
2170{
2171 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2172 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2173 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2174 int status;
2175
2176 /* If a state reset has been done, test_stateid is unneeded */
2177 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2178 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2179 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2180 return -NFS4ERR_BAD_STATEID;
2181
ab7cb0df 2182 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2183 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2184 if (status != NFS_OK) {
2185 /* Free the stateid unless the server explicitly
2186 * informs us the stateid is unrecognized. */
2187 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2188 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2189
2190 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2191 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2192 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2193 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2194 }
2195 return status;
2196}
2197
2198static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2199{
eb64cf96 2200 int status;
b01dd1d8 2201
0c116cad 2202 nfs41_check_delegation_stateid(state);
3e60ffdd 2203 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2204 if (status != NFS_OK)
2205 status = nfs4_open_expired(sp, state);
2206 return status;
f062eb6c
BS		 2207}
2208#endif
2209
aa53ed54
JL		 2210/*
2211 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2212 * fields corresponding to attributes that were used to store the verifier.
2213 * Make sure we clobber those fields in the later setattr call
2214 */
2215static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2216{
2217 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2218 !(sattr->ia_valid & ATTR_ATIME_SET))
2219 sattr->ia_valid |= ATTR_ATIME;
2220
2221 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2222 !(sattr->ia_valid & ATTR_MTIME_SET))
2223 sattr->ia_valid |= ATTR_MTIME;
2224}
2225
c21443c2
TM		 2226static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2227 fmode_t fmode,
2228 int flags,
3efb9722 2229 struct nfs_open_context *ctx)
c21443c2
TM		 2230{
2231 struct nfs4_state_owner *sp = opendata->owner;
2232 struct nfs_server *server = sp->so_server;
275bb307 2233 struct dentry *dentry;
c21443c2
TM		 2234 struct nfs4_state *state;
2235 unsigned int seq;
2236 int ret;
2237
2238 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2239
2240 ret = _nfs4_proc_open(opendata);
dca78001 2241 if (ret != 0)
c21443c2
TM		 2242 goto out;
2243
2244 state = nfs4_opendata_to_nfs4_state(opendata);
2245 ret = PTR_ERR(state);
2246 if (IS_ERR(state))
2247 goto out;
2248 if (server->caps & NFS_CAP_POSIX_LOCK)
2249 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2250
275bb307
TM		 2251 dentry = opendata->dentry;
2252 if (dentry->d_inode == NULL) {
2253 /* FIXME: Is this d_drop() ever needed? */
2254 d_drop(dentry);
2255 dentry = d_add_unique(dentry, igrab(state->inode));
2256 if (dentry == NULL) {
2257 dentry = opendata->dentry;
2258 } else if (dentry != ctx->dentry) {
2259 dput(ctx->dentry);
2260 ctx->dentry = dget(dentry);
2261 }
2262 nfs_set_verifier(dentry,
2263 nfs_save_change_attribute(opendata->dir->d_inode));
2264 }
2265
c21443c2
TM		 2266 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2267 if (ret != 0)
2268 goto out;
2269
3efb9722 2270 ctx->state = state;
c45ffdd2
TM		 2271 if (dentry->d_inode == state->inode) {
2272 nfs_inode_attach_open_context(ctx);
2273 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2274 nfs4_schedule_stateid_recovery(server, state);
2275 }
c21443c2
TM		 2276out:
2277 return ret;
2278}
2279
1da177e4 2280/*
24ac23ab 2281 * Returns a referenced nfs4_state
1da177e4 2282 */
82be417a 2283static int _nfs4_do_open(struct inode *dir,
4197a055 2284 struct nfs_open_context *ctx,
82be417a
AA		 2285 int flags,
2286 struct iattr *sattr,
5bc2afc2
TM		 2287 struct nfs4_label *label,
2288 int *opened)
1da177e4
LT		 2289{
2290 struct nfs4_state_owner *sp;
2291 struct nfs4_state *state = NULL;
2292 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2293 struct nfs4_opendata *opendata;
4197a055
TM		 2294 struct dentry *dentry = ctx->dentry;
2295 struct rpc_cred *cred = ctx->cred;
2296 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2297 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2298 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2299 struct nfs4_label *olabel = NULL;
aac00a8d 2300 int status;
1da177e4
LT		 2301
2302 /* Protect against reboot recovery conflicts */
1da177e4 2303 status = -ENOMEM;
d1e284d5
TM		 2304 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2305 if (sp == NULL) {
1da177e4
LT		 2306 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2307 goto out_err;
2308 }
58d9714a
TM		 2309 status = nfs4_recover_expired_lease(server);
2310 if (status != 0)
b4454fe1 2311 goto err_put_state_owner;
82a2c1b7
AV		 2312 if (dentry->d_inode != NULL)
2313 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2314 status = -ENOMEM;
49f9a0fa
TM		 2315 if (dentry->d_inode)
2316 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2317 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2318 label, claim, GFP_KERNEL);
e56e0b78 2319 if (opendata == NULL)
95d35cb4 2320 goto err_put_state_owner;
1da177e4 2321
14c43f76
DQ		 2322 if (label) {
2323 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2324 if (IS_ERR(olabel)) {
2325 status = PTR_ERR(olabel);
2326 goto err_opendata_put;
2327 }
2328 }
2329
e911b815
TM		 2330 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2331 if (!opendata->f_attr.mdsthreshold) {
2332 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2333 if (!opendata->f_attr.mdsthreshold)
2334 goto err_free_label;
2335 }
1549210f 2336 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2337 }
82a2c1b7
AV		 2338 if (dentry->d_inode != NULL)
2339 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2340
3efb9722 2341 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2342 if (status != 0)
14c43f76 2343 goto err_free_label;
3efb9722 2344 state = ctx->state;
6168f62c 2345
549b19cc
TM		 2346 if ((opendata->o_arg.open_flags & O_EXCL) &&
2347 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2348 nfs4_exclusive_attrset(opendata, sattr);
2349
2350 nfs_fattr_init(opendata->o_res.f_attr);
2351 status = nfs4_do_setattr(state->inode, cred,
2352 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2353 state, label, olabel);
2354 if (status == 0) {
0ab64e0e 2355 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2356 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2357 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2358 }
0ab64e0e 2359 }
5bc2afc2
TM		 2360 if (opendata->file_created)
2361 *opened |= FILE_CREATED;
82be417a 2362
e911b815 2363 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2364 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2365 opendata->f_attr.mdsthreshold = NULL;
2366 }
82be417a 2367
14c43f76
DQ		 2368 nfs4_label_free(olabel);
2369
c6d00e63 2370 nfs4_opendata_put(opendata);
1da177e4 2371 nfs4_put_state_owner(sp);
1da177e4 2372 return 0;
14c43f76
DQ		 2373err_free_label:
2374 nfs4_label_free(olabel);
c6d00e63
TM		 2375err_opendata_put:
2376 nfs4_opendata_put(opendata);
e56e0b78
TM		 2377err_put_state_owner:
2378 nfs4_put_state_owner(sp);
1da177e4 2379out_err:
1da177e4
LT		 2380 return status;
2381}
2382
2383
82be417a 2384static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2385 struct nfs_open_context *ctx,
82be417a
AA		 2386 int flags,
2387 struct iattr *sattr,
5bc2afc2
TM		 2388 struct nfs4_label *label,
2389 int *opened)
1da177e4 2390{
49f9a0fa 2391 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2392 struct nfs4_exception exception = { };
2393 struct nfs4_state *res;
2394 int status;
2395
2396 do {
5bc2afc2 2397 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2398 res = ctx->state;
42113a75 2399 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2400 if (status == 0)
2401 break;
2402 /* NOTE: BAD_SEQID means the server and client disagree about the
2403 * book-keeping w.r.t. state-changing operations
2404 * (OPEN/CLOSE/LOCK/LOCKU...)
2405 * It is actually a sign of a bug on the client or on the server.
2406 *
2407 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2408 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2409 * have unhashed the old state_owner for us, and that we can
2410 * therefore safely retry using a new one. We should still warn
2411 * the user though...
2412 */
2413 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2414 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2415 " returned a bad sequence-id error!\n",
2416 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2417 exception.retry = 1;
2418 continue;
2419 }
550f5747
TM		 2420 /*
2421 * BAD_STATEID on OPEN means that the server cancelled our
2422 * state before it received the OPEN_CONFIRM.
2423 * Recover by retrying the request as per the discussion
2424 * on Page 181 of RFC3530.
2425 */
2426 if (status == -NFS4ERR_BAD_STATEID) {
2427 exception.retry = 1;
2428 continue;
2429 }
aac00a8d
TM		 2430 if (status == -EAGAIN) {
2431 /* We must have found a delegation */
2432 exception.retry = 1;
2433 continue;
2434 }
49f9a0fa
TM		 2435 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2436 continue;
2437 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2438 status, &exception));
2439 } while (exception.retry);
2440 return res;
2441}
2442
659bfcd6
TM		 2443static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2444 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2445 struct nfs4_state *state, struct nfs4_label *ilabel,
2446 struct nfs4_label *olabel)
1da177e4 2447{
3e4f6290 2448 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2449 struct nfs_setattrargs arg = {
3e4f6290 2450 .fh = NFS_FH(inode),
1da177e4
LT		 2451 .iap = sattr,
2452 .server = server,
2453 .bitmask = server->attr_bitmask,
1775fd3e 2454 .label = ilabel,
1da177e4
LT		 2455 };
2456 struct nfs_setattrres res = {
2457 .fattr = fattr,
1775fd3e 2458 .label = olabel,
1da177e4
LT		 2459 .server = server,
2460 };
2461 struct rpc_message msg = {
659bfcd6
TM		 2462 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2463 .rpc_argp = &arg,
2464 .rpc_resp = &res,
2465 .rpc_cred = cred,
1da177e4 2466 };
26e976a8 2467 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2468 fmode_t fmode;
2469 bool truncate;
65e4308d 2470 int status;
1da177e4 2471
aa9c2669
DQ		 2472 arg.bitmask = nfs4_bitmask(server, ilabel);
2473 if (ilabel)
2474 arg.bitmask = nfs4_bitmask(server, olabel);
2475
0e574af1 2476 nfs_fattr_init(fattr);
1da177e4 2477
ee3ae84e
TM		 2478 /* Servers should only apply open mode checks for file size changes */
2479 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2480 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2481
2482 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2483 /* Use that stateid */
0418dae1 2484 } else if (truncate && state != NULL) {
2a369153
TM		 2485 struct nfs_lockowner lockowner = {
2486 .l_owner = current->files,
2487 .l_pid = current->tgid,
2488 };
0418dae1
TM		 2489 if (!nfs4_valid_open_stateid(state))
2490 return -EBADF;
2491 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2492 &lockowner) == -EIO)
2493 return -EBADF;
08e9eac4 2494 } else
f597c537 2495 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2496
7c513058 2497 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2498 if (status == 0 && state != NULL)
2499 renew_lease(server, timestamp);
65e4308d 2500 return status;
1da177e4
LT		 2501}
2502
659bfcd6
TM		 2503static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2504 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2505 struct nfs4_state *state, struct nfs4_label *ilabel,
2506 struct nfs4_label *olabel)
1da177e4 2507{
3e4f6290 2508 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2509 struct nfs4_exception exception = {
2510 .state = state,
3114ea7a 2511 .inode = inode,
a1d0b5ee 2512 };
1da177e4
LT		 2513 int err;
2514 do {
1775fd3e 2515 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2516 trace_nfs4_setattr(inode, err);
451146be
TM		 2517 switch (err) {
2518 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2519 if (!(sattr->ia_valid & ATTR_SIZE)) {
2520 pr_warn_once("NFSv4: server %s is incorrectly "
2521 "applying open mode checks to "
2522 "a SETATTR that is not "
2523 "changing file size.\n",
2524 server->nfs_client->cl_hostname);
2525 }
451146be
TM		 2526 if (state && !(state->state & FMODE_WRITE)) {
2527 err = -EBADF;
2528 if (sattr->ia_valid & ATTR_OPEN)
2529 err = -EACCES;
2530 goto out;
2531 }
2532 }
2533 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2534 } while (exception.retry);
451146be 2535out:
1da177e4
LT		 2536 return err;
2537}
2538
2539struct nfs4_closedata {
2540 struct inode *inode;
2541 struct nfs4_state *state;
2542 struct nfs_closeargs arg;
2543 struct nfs_closeres res;
516a6af6 2544 struct nfs_fattr fattr;
26e976a8 2545 unsigned long timestamp;
f7e8917a
FI		 2546 bool roc;
2547 u32 roc_barrier;
1da177e4
LT		 2548};
2549
963d8fe5 2550static void nfs4_free_closedata(void *data)
9512135d 2551{
963d8fe5
TM		 2552 struct nfs4_closedata *calldata = data;
2553 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2554 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2555
f7e8917a
FI		 2556 if (calldata->roc)
2557 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2558 nfs4_put_open_state(calldata->state);
2559 nfs_free_seqid(calldata->arg.seqid);
9512135d 2560 nfs4_put_state_owner(sp);
322b2b90 2561 nfs_sb_deactive(sb);
9512135d
TM		 2562 kfree(calldata);
2563}
2564
963d8fe5 2565static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2566{
963d8fe5 2567 struct nfs4_closedata *calldata = data;
1da177e4 2568 struct nfs4_state *state = calldata->state;
1da177e4 2569 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2570 nfs4_stateid *res_stateid = NULL;
1da177e4 2571
a3ca5651 2572 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2573 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2574 return;
42113a75 2575 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2576 /* hmm. we are done with the inode, and in the process of freeing
2577 * the state_owner. we keep this around to process errors
2578 */
1da177e4
LT		 2579 switch (task->tk_status) {
2580 case 0:
412f6c4c
TM		 2581 res_stateid = &calldata->res.stateid;
2582 if (calldata->arg.fmode == 0 && calldata->roc)
f7e8917a
FI		 2583 pnfs_roc_set_barrier(state->inode,
2584 calldata->roc_barrier);
26e976a8 2585 renew_lease(server, calldata->timestamp);
412f6c4c 2586 break;
69794ad7 2587 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2588 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2589 case -NFS4ERR_OLD_STATEID:
2590 case -NFS4ERR_BAD_STATEID:
1da177e4 2591 case -NFS4ERR_EXPIRED:
dc0b027d 2592 if (calldata->arg.fmode == 0)
9e33bed5 2593 break;
1da177e4 2594 default:
8478eaa1 2595 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2596 rpc_restart_call_prepare(task);
69794ad7
TM		 2597 goto out_release;
2598 }
1da177e4 2599 }
412f6c4c 2600 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
69794ad7 2601out_release:
72211dbe 2602 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2603 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2604 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2605}
2606
4ce70ada 2607static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2608{
4ce70ada 2609 struct nfs4_closedata *calldata = data;
9512135d 2610 struct nfs4_state *state = calldata->state;
7fdab069 2611 struct inode *inode = calldata->inode;
aee7af35 2612 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2613 int call_close = 0;
9512135d 2614
a3ca5651 2615 dprintk("%s: begin!\n", __func__);
963d8fe5 2616 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2617 goto out_wait;
003707c7 2618
88069f77 2619 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2620 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2621 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2622 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2623 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
003707c7 2624 /* Calculate the change in open mode */
cd9288ff 2625 calldata->arg.fmode = 0;
e7616923 2626 if (state->n_rdwr == 0) {
cd9288ff
TM		 2627 if (state->n_rdonly == 0)
2628 call_close |= is_rdonly;
2629 else if (is_rdonly)
2630 calldata->arg.fmode |= FMODE_READ;
2631 if (state->n_wronly == 0)
2632 call_close |= is_wronly;
2633 else if (is_wronly)
2634 calldata->arg.fmode |= FMODE_WRITE;
2635 } else if (is_rdwr)
2636 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2637
2638 if (calldata->arg.fmode == 0)
2639 call_close |= is_rdwr;
2640
5d422301
TM		 2641 if (!nfs4_valid_open_stateid(state))
2642 call_close = 0;
4cecb76f 2643 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2644
2645 if (!call_close) {
963d8fe5 2646 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2647 goto out_no_action;
9512135d 2648 }
88069f77 2649
f7e8917a 2650 if (calldata->arg.fmode == 0) {
88069f77 2651 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2652 if (calldata->roc &&
b9536ad5
AA		 2653 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2654 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2655 goto out_wait;
b9536ad5 2656 }
f7e8917a 2657 }
88069f77 2658
516a6af6 2659 nfs_fattr_init(calldata->res.fattr);
26e976a8 2660 calldata->timestamp = jiffies;
7fdab069 2661 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2662 &calldata->arg.seq_args,
2663 &calldata->res.seq_res,
2240a9e2
TM		 2664 task) != 0)
2665 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2666 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2667 return;
2668out_no_action:
2669 task->tk_action = NULL;
2670out_wait:
2671 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2672}
2673
963d8fe5 2674static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2675 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2676 .rpc_call_done = nfs4_close_done,
2677 .rpc_release = nfs4_free_closedata,
2678};
2679
fe08c546
PT		 2680static bool nfs4_state_has_opener(struct nfs4_state *state)
2681{
2682 /* first check existing openers */
2683 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 &&
2684 state->n_rdonly != 0)
2685 return true;
2686
2687 if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 &&
2688 state->n_wronly != 0)
2689 return true;
2690
2691 if (test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 &&
2692 state->n_rdwr != 0)
2693 return true;
2694
2695 return false;
2696}
2697
2698static bool nfs4_roc(struct inode *inode)
2699{
2700 struct nfs_inode *nfsi = NFS_I(inode);
2701 struct nfs_open_context *ctx;
2702 struct nfs4_state *state;
2703
2704 spin_lock(&inode->i_lock);
2705 list_for_each_entry(ctx, &nfsi->open_files, list) {
2706 state = ctx->state;
2707 if (state == NULL)
2708 continue;
2709 if (nfs4_state_has_opener(state)) {
2710 spin_unlock(&inode->i_lock);
2711 return false;
2712 }
2713 }
2714 spin_unlock(&inode->i_lock);
2715
2716 if (nfs4_check_delegation(inode, FMODE_READ))
2717 return false;
2718
2719 return pnfs_roc(inode);
2720}
2721
1da177e4
LT		 2722/*
2723 * It is possible for data to be read/written from a mem-mapped file
2724 * after the sys_close call (which hits the vfs layer as a flush).
2725 * This means that we can't safely call nfsv4 close on a file until
2726 * the inode is cleared. This in turn means that we are not good
2727 * NFSv4 citizens - we do not indicate to the server to update the file's
2728 * share state even when we are done with one of the three share
2729 * stateid's in the inode.
2730 *
2731 * NOTE: Caller must be holding the sp->so_owner semaphore!
2732 */
1f7977c1 2733int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2734{
4a35bd41 2735 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2736 struct nfs4_closedata *calldata;
b39e625b
TM		 2737 struct nfs4_state_owner *sp = state->owner;
2738 struct rpc_task *task;
5138fde0
TM		 2739 struct rpc_message msg = {
2740 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2741 .rpc_cred = state->owner->so_cred,
2742 };
c970aa85
TM		 2743 struct rpc_task_setup task_setup_data = {
2744 .rpc_client = server->client,
5138fde0 2745 .rpc_message = &msg,
c970aa85 2746 .callback_ops = &nfs4_close_ops,
101070ca 2747 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2748 .flags = RPC_TASK_ASYNC,
2749 };
9512135d 2750 int status = -ENOMEM;
1da177e4 2751
fa940720
WAA		 2752 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2753 &task_setup_data.rpc_client, &msg);
2754
8535b2be 2755 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2756 if (calldata == NULL)
9512135d 2757 goto out;
a9c92d6b 2758 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2759 calldata->inode = state->inode;
1da177e4 2760 calldata->state = state;
4a35bd41 2761 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2762 calldata->arg.stateid = &state->open_stateid;
1da177e4 2763 /* Serialization for the sequence id */
8535b2be 2764 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2765 if (calldata->arg.seqid == NULL)
2766 goto out_free_calldata;
dc0b027d 2767 calldata->arg.fmode = 0;
a65318bf 2768 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2769 calldata->res.fattr = &calldata->fattr;
c1d51931 2770 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2771 calldata->res.server = server;
fe08c546 2772 calldata->roc = nfs4_roc(state->inode);
643168c2 2773 nfs_sb_active(calldata->inode->i_sb);
9512135d 2774
1174dd1f
TM		 2775 msg.rpc_argp = &calldata->arg;
2776 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2777 task_setup_data.callback_data = calldata;
2778 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2779 if (IS_ERR(task))
2780 return PTR_ERR(task);
a49c3c77
TM		 2781 status = 0;
2782 if (wait)
2783 status = rpc_wait_for_completion_task(task);
b39e625b 2784 rpc_put_task(task);
a49c3c77 2785 return status;
9512135d
TM		 2786out_free_calldata:
2787 kfree(calldata);
2788out:
b39e625b
TM		 2789 nfs4_put_open_state(state);
2790 nfs4_put_state_owner(sp);
9512135d 2791 return status;
1da177e4
LT		 2792}
2793
2b484297 2794static struct inode *
5bc2afc2
TM		 2795nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2796 int open_flags, struct iattr *attr, int *opened)
1da177e4 2797{
1da177e4 2798 struct nfs4_state *state;
aa9c2669
DQ		 2799 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2800
2801 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2802
565277f6 2803 /* Protect against concurrent sillydeletes */
5bc2afc2 2804 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2805
2806 nfs4_label_release_security(label);
2807
f46e0bd3
TM		 2808 if (IS_ERR(state))
2809 return ERR_CAST(state);
275bb307 2810 return state->inode;
1da177e4
LT		 2811}
2812
1185a552 2813static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2814{
2815 if (ctx->state == NULL)
2816 return;
2817 if (is_sync)
643168c2 2818 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2819 else
643168c2 2820 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2821}
1da177e4 2822
b944dba3
TM		 2823#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2824#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2825#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2826
1da177e4
LT		 2827static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2828{
43652ad5
BH		 2829 struct nfs4_server_caps_arg args = {
2830 .fhandle = fhandle,
2831 };
1da177e4
LT		 2832 struct nfs4_server_caps_res res = {};
2833 struct rpc_message msg = {
2834 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2835 .rpc_argp = &args,
1da177e4
LT		 2836 .rpc_resp = &res,
2837 };
2838 int status;
2839
7c513058 2840 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2841 if (status == 0) {
b944dba3
TM		 2842 /* Sanity check the server answers */
2843 switch (server->nfs_client->cl_minorversion) {
2844 case 0:
2845 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2846 res.attr_bitmask[2] = 0;
2847 break;
2848 case 1:
2849 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2850 break;
2851 case 2:
2852 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2853 }
1da177e4 2854 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2855 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2856 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2857 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2858 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2859 NFS_CAP_CTIME|NFS_CAP_MTIME|
2860 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2861 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2862 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2863 server->caps |= NFS_CAP_ACLS;
2864 if (res.has_links != 0)
2865 server->caps |= NFS_CAP_HARDLINKS;
2866 if (res.has_symlinks != 0)
2867 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2868 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2869 server->caps |= NFS_CAP_FILEID;
2870 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2871 server->caps |= NFS_CAP_MODE;
2872 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2873 server->caps |= NFS_CAP_NLINK;
2874 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2875 server->caps |= NFS_CAP_OWNER;
2876 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2877 server->caps |= NFS_CAP_OWNER_GROUP;
2878 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2879 server->caps |= NFS_CAP_ATIME;
2880 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2881 server->caps |= NFS_CAP_CTIME;
2882 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2883 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2884#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2885 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2886 server->caps |= NFS_CAP_SECURITY_LABEL;
2887#endif
2888 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2889 sizeof(server->attr_bitmask));
b944dba3 2890 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2891
a65318bf
TM		 2892 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2893 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2894 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2895 server->cache_consistency_bitmask[2] = 0;
1da177e4 2896 server->acl_bitmask = res.acl_bitmask;
264e6351 2897 server->fh_expire_type = res.fh_expire_type;
1da177e4 2898 }
cccef3b9 2899
1da177e4
LT		 2900 return status;
2901}
2902
55a97593 2903int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2904{
2905 struct nfs4_exception exception = { };
2906 int err;
2907 do {
2908 err = nfs4_handle_exception(server,
2909 _nfs4_server_capabilities(server, fhandle),
2910 &exception);
2911 } while (exception.retry);
2912 return err;
2913}
2914
2915static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2916 struct nfs_fsinfo *info)
2917{
aa9c2669 2918 u32 bitmask[3];
1da177e4 2919 struct nfs4_lookup_root_arg args = {
aa9c2669 2920 .bitmask = bitmask,
1da177e4
LT		 2921 };
2922 struct nfs4_lookup_res res = {
2923 .server = server,
0e574af1 2924 .fattr = info->fattr,
1da177e4
LT		 2925 .fh = fhandle,
2926 };
2927 struct rpc_message msg = {
2928 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2929 .rpc_argp = &args,
2930 .rpc_resp = &res,
2931 };
008f55d0 2932
aa9c2669
DQ		 2933 bitmask[0] = nfs4_fattr_bitmap[0];
2934 bitmask[1] = nfs4_fattr_bitmap[1];
2935 /*
2936 * Process the label in the upcoming getfattr
2937 */
2938 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2939
0e574af1 2940 nfs_fattr_init(info->fattr);
7c513058 2941 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2942}
2943
2944static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2945 struct nfs_fsinfo *info)
2946{
2947 struct nfs4_exception exception = { };
2948 int err;
2949 do {
fb8a5ba8 2950 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2951 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2952 switch (err) {
2953 case 0:
2954 case -NFS4ERR_WRONGSEC:
05e9cfb4 2955 goto out;
fb8a5ba8
BS		 2956 default:
2957 err = nfs4_handle_exception(server, err, &exception);
2958 }
1da177e4 2959 } while (exception.retry);
05e9cfb4 2960out:
1da177e4
LT		 2961 return err;
2962}
2963
8f70e95f
BS		 2964static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2965 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2966{
c2190661
TM		 2967 struct rpc_auth_create_args auth_args = {
2968 .pseudoflavor = flavor,
2969 };
8f70e95f
BS		 2970 struct rpc_auth *auth;
2971 int ret;
2972
c2190661 2973 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 2974 if (IS_ERR(auth)) {
75bc8821 2975 ret = -EACCES;
8f70e95f
BS		 2976 goto out;
2977 }
2978 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2979out:
2980 return ret;
2981}
2982
9a744ba3
CL		 2983/*
2984 * Retry pseudoroot lookup with various security flavors. We do this when:
2985 *
2986 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2987 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2988 *
2989 * Returns zero on success, or a negative NFS4ERR value, or a
2990 * negative errno value.
2991 */
801a16dc 2992static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2993 struct nfs_fsinfo *info)
1da177e4 2994{
9a744ba3
CL		 2995 /* Per 3530bis 15.33.5 */
2996 static const rpc_authflavor_t flav_array[] = {
2997 RPC_AUTH_GSS_KRB5P,
2998 RPC_AUTH_GSS_KRB5I,
2999 RPC_AUTH_GSS_KRB5,
c4eafe11 3000 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3001 RPC_AUTH_NULL,
3002 };
3003 int status = -EPERM;
3004 size_t i;
6a1a1e34 3005
4d4b69dd
WAA		 3006 if (server->auth_info.flavor_len > 0) {
3007 /* try each flavor specified by user */
3008 for (i = 0; i < server->auth_info.flavor_len; i++) {
3009 status = nfs4_lookup_root_sec(server, fhandle, info,
3010 server->auth_info.flavors[i]);
3011 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3012 continue;
3013 break;
3014 }
3015 } else {
3016 /* no flavors specified by user, try default list */
3017 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3018 status = nfs4_lookup_root_sec(server, fhandle, info,
3019 flav_array[i]);
3020 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3021 continue;
3022 break;
3023 }
8f70e95f 3024 }
9a744ba3 3025
fb8a5ba8
BS		 3026 /*
3027 * -EACCESS could mean that the user doesn't have correct permissions
3028 * to access the mount. It could also mean that we tried to mount
3029 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3030 * existing mount programs don't handle -EACCES very well so it should
3031 * be mapped to -EPERM instead.
3032 */
3033 if (status == -EACCES)
3034 status = -EPERM;
801a16dc
BS		 3035 return status;
3036}
3037
2ed4b95b
CL		 3038static int nfs4_do_find_root_sec(struct nfs_server *server,
3039 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3040{
3041 int mv = server->nfs_client->cl_minorversion;
3042 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3043}
3044
3045/**
3046 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3047 * @server: initialized nfs_server handle
3048 * @fhandle: we fill in the pseudo-fs root file handle
3049 * @info: we fill in an FSINFO struct
5e6b1990 3050 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3051 *
3052 * Returns zero on success, or a negative errno.
801a16dc 3053 */
3028eb2b 3054int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3055 struct nfs_fsinfo *info,
3056 bool auth_probe)
801a16dc 3057{
2ed4b95b
CL		 3058 int status;
3059
5e6b1990
TM		 3060 switch (auth_probe) {
3061 case false:
3062 status = nfs4_lookup_root(server, fhandle, info);
3063 if (status != -NFS4ERR_WRONGSEC)
3064 break;
5e6b1990 3065 default:
2ed4b95b 3066 status = nfs4_do_find_root_sec(server, fhandle, info);
5e6b1990 3067 }
2ed4b95b 3068
1da177e4
LT		 3069 if (status == 0)
3070 status = nfs4_server_capabilities(server, fhandle);
3071 if (status == 0)
3072 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3073
c12e87f4 3074 return nfs4_map_errors(status);
1da177e4
LT		 3075}
3076
bae36241
BS		 3077static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3078 struct nfs_fsinfo *info)
3079{
3080 int error;
3081 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3082 struct nfs4_label *label = NULL;
bae36241
BS		 3083
3084 error = nfs4_server_capabilities(server, mntfh);
3085 if (error < 0) {
3086 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3087 return error;
3088 }
3089
14c43f76
DQ		 3090 label = nfs4_label_alloc(server, GFP_KERNEL);
3091 if (IS_ERR(label))
3092 return PTR_ERR(label);
3093
1775fd3e 3094 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3095 if (error < 0) {
3096 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3097 goto err_free_label;
bae36241
BS		 3098 }
3099
3100 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3101 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3102 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3103
14c43f76
DQ		 3104err_free_label:
3105 nfs4_label_free(label);
3106
bae36241
BS		 3107 return error;
3108}
3109
6b97fd3d
MN		 3110/*
3111 * Get locations and (maybe) other attributes of a referral.
3112 * Note that we'll actually follow the referral later when
3113 * we detect fsid mismatch in inode revalidation
3114 */
f05d147f
BS		 3115static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3116 const struct qstr *name, struct nfs_fattr *fattr,
3117 struct nfs_fh *fhandle)
6b97fd3d
MN		 3118{
3119 int status = -ENOMEM;
3120 struct page *page = NULL;
3121 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3122
3123 page = alloc_page(GFP_KERNEL);
3124 if (page == NULL)
3125 goto out;
3126 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3127 if (locations == NULL)
3128 goto out;
3129
f05d147f 3130 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3131 if (status != 0)
3132 goto out;
519ae255
CL		 3133
3134 /*
3135 * If the fsid didn't change, this is a migration event, not a
3136 * referral. Cause us to drop into the exception handler, which
3137 * will kick off migration recovery.
3138 */
6b97fd3d 3139 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3140 dprintk("%s: server did not return a different fsid for"
3141 " a referral at %s\n", __func__, name->name);
519ae255 3142 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3143 goto out;
3144 }
533eb461
AA		 3145 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3146 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3147
533eb461 3148 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3149 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3150 memset(fhandle, 0, sizeof(struct nfs_fh));
3151out:
3152 if (page)
3153 __free_page(page);
5d7ca35a 3154 kfree(locations);
6b97fd3d
MN		 3155 return status;
3156}
3157
1775fd3e
DQ		 3158static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3159 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3160{
3161 struct nfs4_getattr_arg args = {
3162 .fh = fhandle,
3163 .bitmask = server->attr_bitmask,
3164 };
3165 struct nfs4_getattr_res res = {
3166 .fattr = fattr,
1775fd3e 3167 .label = label,
1da177e4
LT		 3168 .server = server,
3169 };
3170 struct rpc_message msg = {
3171 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3172 .rpc_argp = &args,
3173 .rpc_resp = &res,
3174 };
aa9c2669
DQ		 3175
3176 args.bitmask = nfs4_bitmask(server, label);
3177
0e574af1 3178 nfs_fattr_init(fattr);
7c513058 3179 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3180}
3181
1775fd3e
DQ		 3182static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3183 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3184{
3185 struct nfs4_exception exception = { };
3186 int err;
3187 do {
b5f875a9
TM		 3188 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3189 trace_nfs4_getattr(server, fhandle, fattr, err);
3190 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3191 &exception);
3192 } while (exception.retry);
3193 return err;
3194}
3195
3196/*
3197 * The file is not closed if it is opened due to the a request to change
3198 * the size of the file. The open call will not be needed once the
3199 * VFS layer lookup-intents are implemented.
3200 *
3201 * Close is called when the inode is destroyed.
3202 * If we haven't opened the file for O_WRONLY, we
3203 * need to in the size_change case to obtain a stateid.
3204 *
3205 * Got race?
3206 * Because OPEN is always done by name in nfsv4, it is
3207 * possible that we opened a different file by the same
3208 * name. We can recognize this race condition, but we
3209 * can't do anything about it besides returning an error.
3210 *
3211 * This will be fixed with VFS changes (lookup-intent).
3212 */
3213static int
3214nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3215 struct iattr *sattr)
3216{
08e9eac4 3217 struct inode *inode = dentry->d_inode;
659bfcd6 3218 struct rpc_cred *cred = NULL;
d530838b 3219 struct nfs4_state *state = NULL;
14c43f76 3220 struct nfs4_label *label = NULL;
1da177e4
LT		 3221 int status;
3222
88ac815c
PT		 3223 if (pnfs_ld_layoutret_on_setattr(inode) &&
3224 sattr->ia_valid & ATTR_SIZE &&
3225 sattr->ia_size < i_size_read(inode))
24028672 3226 pnfs_commit_and_return_layout(inode);
8a1636c4 3227
0e574af1 3228 nfs_fattr_init(fattr);
1da177e4 3229
2669940d
AA		 3230 /* Deal with open(O_TRUNC) */
3231 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3232 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3233
3234 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3235 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3236 return 0;
3237
d530838b 3238 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3239 if (sattr->ia_valid & ATTR_FILE) {
3240 struct nfs_open_context *ctx;
3241
3242 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3243 if (ctx) {
3244 cred = ctx->cred;
3245 state = ctx->state;
3246 }
659bfcd6 3247 }
08e9eac4 3248
14c43f76
DQ		 3249 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3250 if (IS_ERR(label))
3251 return PTR_ERR(label);
3252
3253 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3254 if (status == 0) {
65e4308d 3255 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 3256 nfs_setsecurity(inode, fattr, label);
3257 }
14c43f76 3258 nfs4_label_free(label);
1da177e4
LT		 3259 return status;
3260}
3261
0c2e53f1
TM		 3262static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3263 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3264 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3265{
0c2e53f1 3266 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3267 int status;
3268 struct nfs4_lookup_arg args = {
3269 .bitmask = server->attr_bitmask,
0c2e53f1 3270 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3271 .name = name,
3272 };
3273 struct nfs4_lookup_res res = {
3274 .server = server,
3275 .fattr = fattr,
aa9c2669 3276 .label = label,
2b3de441
DH		 3277 .fh = fhandle,
3278 };
3279 struct rpc_message msg = {
3280 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3281 .rpc_argp = &args,
3282 .rpc_resp = &res,
3283 };
3284
aa9c2669
DQ		 3285 args.bitmask = nfs4_bitmask(server, label);
3286
2b3de441
DH		 3287 nfs_fattr_init(fattr);
3288
1da177e4 3289 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3290 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3291 dprintk("NFS reply lookup: %d\n", status);
3292 return status;
3293}
3294
72de53ec 3295static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3296{
7ebb9315 3297 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3298 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3299 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3300 fattr->nlink = 2;
3301}
3302
72de53ec
BS		 3303static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3304 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3305 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3306{
3307 struct nfs4_exception exception = { };
72de53ec 3308 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3309 int err;
3310 do {
1775fd3e 3311 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3312 trace_nfs4_lookup(dir, name, err);
72de53ec 3313 switch (err) {
08ef7bd3 3314 case -NFS4ERR_BADNAME:
72de53ec
BS		 3315 err = -ENOENT;
3316 goto out;
0c2e53f1 3317 case -NFS4ERR_MOVED:
f05d147f 3318 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3319 goto out;
0c2e53f1 3320 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3321 err = -EPERM;
3322 if (client != *clnt)
3323 goto out;
66b06860 3324 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3325 if (IS_ERR(client))
3326 return PTR_ERR(client);
3327
3328 exception.retry = 1;
3329 break;
3330 default:
3331 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3332 }
1da177e4 3333 } while (exception.retry);
72de53ec
BS		 3334
3335out:
3336 if (err == 0)
3337 *clnt = client;
3338 else if (client != *clnt)
3339 rpc_shutdown_client(client);
3340
1da177e4
LT		 3341 return err;
3342}
3343
80a16b21 3344static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3345 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3346 struct nfs4_label *label)
72de53ec
BS		 3347{
3348 int status;
3349 struct rpc_clnt *client = NFS_CLIENT(dir);
3350
1775fd3e 3351 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3352 if (client != NFS_CLIENT(dir)) {
3353 rpc_shutdown_client(client);
3354 nfs_fixup_secinfo_attributes(fattr);
3355 }
3356 return status;
3357}
3358
f05d147f
BS		 3359struct rpc_clnt *
3360nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3361 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3362{
b72888cb 3363 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3364 int status;
f05d147f 3365
1775fd3e 3366 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3367 if (status < 0)
f05d147f 3368 return ERR_PTR(status);
b72888cb 3369 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3370}
3371
1da177e4
LT		 3372static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3373{
76b32999 3374 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3375 struct nfs4_accessargs args = {
3376 .fh = NFS_FH(inode),
a4980e78 3377 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3378 };
3379 struct nfs4_accessres res = {
3380 .server = server,
1da177e4 3381 };
1da177e4
LT		 3382 struct rpc_message msg = {
3383 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3384 .rpc_argp = &args,
3385 .rpc_resp = &res,
3386 .rpc_cred = entry->cred,
3387 };
3388 int mode = entry->mask;
aa9c2669 3389 int status = 0;
1da177e4
LT		 3390
3391 /*
3392 * Determine which access bits we want to ask for...
3393 */
3394 if (mode & MAY_READ)
3395 args.access |= NFS4_ACCESS_READ;
3396 if (S_ISDIR(inode->i_mode)) {
3397 if (mode & MAY_WRITE)
3398 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3399 if (mode & MAY_EXEC)
3400 args.access |= NFS4_ACCESS_LOOKUP;
3401 } else {
3402 if (mode & MAY_WRITE)
3403 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3404 if (mode & MAY_EXEC)
3405 args.access |= NFS4_ACCESS_EXECUTE;
3406 }
c407d41a
TM		 3407
3408 res.fattr = nfs_alloc_fattr();
3409 if (res.fattr == NULL)
3410 return -ENOMEM;
3411
7c513058 3412 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3413 if (!status) {
6168f62c 3414 nfs_access_set_mask(entry, res.access);
c407d41a 3415 nfs_refresh_inode(inode, res.fattr);
1da177e4 3416 }
c407d41a 3417 nfs_free_fattr(res.fattr);
1da177e4
LT		 3418 return status;
3419}
3420
3421static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3422{
3423 struct nfs4_exception exception = { };
3424 int err;
3425 do {
c1578b76
TM		 3426 err = _nfs4_proc_access(inode, entry);
3427 trace_nfs4_access(inode, err);
3428 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3429 &exception);
3430 } while (exception.retry);
3431 return err;
3432}
3433
3434/*
3435 * TODO: For the time being, we don't try to get any attributes
3436 * along with any of the zero-copy operations READ, READDIR,
3437 * READLINK, WRITE.
3438 *
3439 * In the case of the first three, we want to put the GETATTR
3440 * after the read-type operation -- this is because it is hard
3441 * to predict the length of a GETATTR response in v4, and thus
3442 * align the READ data correctly. This means that the GETATTR
3443 * may end up partially falling into the page cache, and we should
3444 * shift it into the 'tail' of the xdr_buf before processing.
3445 * To do this efficiently, we need to know the total length
3446 * of data received, which doesn't seem to be available outside
3447 * of the RPC layer.
3448 *
3449 * In the case of WRITE, we also want to put the GETATTR after
3450 * the operation -- in this case because we want to make sure
140150db 3451 * we get the post-operation mtime and size.
1da177e4
LT		 3452 *
3453 * Both of these changes to the XDR layer would in fact be quite
3454 * minor, but I decided to leave them for a subsequent patch.
3455 */
3456static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3457 unsigned int pgbase, unsigned int pglen)
3458{
3459 struct nfs4_readlink args = {
3460 .fh = NFS_FH(inode),
3461 .pgbase = pgbase,
3462 .pglen = pglen,
3463 .pages = &page,
3464 };
f50c7000 3465 struct nfs4_readlink_res res;
1da177e4
LT		 3466 struct rpc_message msg = {
3467 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3468 .rpc_argp = &args,
f50c7000 3469 .rpc_resp = &res,
1da177e4
LT		 3470 };
3471
7c513058 3472 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3473}
3474
3475static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3476 unsigned int pgbase, unsigned int pglen)
3477{
3478 struct nfs4_exception exception = { };
3479 int err;
3480 do {
c1578b76
TM		 3481 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3482 trace_nfs4_readlink(inode, err);
3483 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3484 &exception);
3485 } while (exception.retry);
3486 return err;
3487}
3488
1da177e4 3489/*
8867fe58 3490 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3491 */
1da177e4
LT		 3492static int
3493nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3494 int flags)
1da177e4 3495{
aa9c2669 3496 struct nfs4_label l, *ilabel = NULL;
8867fe58 3497 struct nfs_open_context *ctx;
1da177e4 3498 struct nfs4_state *state;
5bc2afc2 3499 int opened = 0;
1da177e4
LT		 3500 int status = 0;
3501
8867fe58
MS		 3502 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3503 if (IS_ERR(ctx))
3504 return PTR_ERR(ctx);
3505
aa9c2669
DQ		 3506 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3507
a8a5da99 3508 sattr->ia_mode &= ~current_umask();
5bc2afc2 3509 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3510 if (IS_ERR(state)) {
3511 status = PTR_ERR(state);
c0204fd2 3512 goto out;
1da177e4 3513 }
1da177e4 3514out:
aa9c2669 3515 nfs4_label_release_security(ilabel);
8867fe58 3516 put_nfs_open_context(ctx);
1da177e4
LT		 3517 return status;
3518}
3519
3520static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3521{
16e42959 3522 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3523 struct nfs_removeargs args = {
1da177e4 3524 .fh = NFS_FH(dir),
26fe5750 3525 .name = *name,
16e42959 3526 };
4fdc17b2 3527 struct nfs_removeres res = {
16e42959 3528 .server = server,
1da177e4 3529 };
1da177e4 3530 struct rpc_message msg = {
4fdc17b2
TM		 3531 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3532 .rpc_argp = &args,
3533 .rpc_resp = &res,
1da177e4 3534 };
778d2817 3535 int status;
1da177e4 3536
7c513058 3537 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3538 if (status == 0)
16e42959 3539 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3540 return status;
3541}
3542
3543static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3544{
3545 struct nfs4_exception exception = { };
3546 int err;
3547 do {
078ea3df
TM		 3548 err = _nfs4_proc_remove(dir, name);
3549 trace_nfs4_remove(dir, name, err);
3550 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3551 &exception);
3552 } while (exception.retry);
3553 return err;
3554}
3555
e4eff1a6 3556static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3557{
e4eff1a6
TM		 3558 struct nfs_server *server = NFS_SERVER(dir);
3559 struct nfs_removeargs *args = msg->rpc_argp;
3560 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3561
e4eff1a6 3562 res->server = server;
1da177e4 3563 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3564 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3565
3566 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3567}
3568
34e137cc
BS		 3569static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3570{
d9afbd1b
TM		 3571 nfs4_setup_sequence(NFS_SERVER(data->dir),
3572 &data->args.seq_args,
3573 &data->res.seq_res,
3574 task);
1da177e4
LT		 3575}
3576
e4eff1a6 3577static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3578{
078ea3df
TM		 3579 struct nfs_unlinkdata *data = task->tk_calldata;
3580 struct nfs_removeres *res = &data->res;
e4eff1a6 3581
14516c3a
TM		 3582 if (!nfs4_sequence_done(task, &res->seq_res))
3583 return 0;
8478eaa1
N		 3584 if (nfs4_async_handle_error(task, res->server, NULL,
3585 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3586 return 0;
3587 update_changeattr(dir, &res->cinfo);
e4eff1a6 3588 return 1;
1da177e4
LT		 3589}
3590
d3d4152a
JL		 3591static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3592{
3593 struct nfs_server *server = NFS_SERVER(dir);
3594 struct nfs_renameargs *arg = msg->rpc_argp;
3595 struct nfs_renameres *res = msg->rpc_resp;
3596
3597 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3598 res->server = server;
a9c92d6b 3599 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3600}
3601
c6bfa1a1
BS		 3602static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3603{
d9afbd1b
TM		 3604 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3605 &data->args.seq_args,
3606 &data->res.seq_res,
3607 task);
d3d4152a
JL		 3608}
3609
3610static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3611 struct inode *new_dir)
3612{
fbc6f7c2
TM		 3613 struct nfs_renamedata *data = task->tk_calldata;
3614 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3615
3616 if (!nfs4_sequence_done(task, &res->seq_res))
3617 return 0;
8478eaa1 3618 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3619 return 0;
3620
3621 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3622 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3623 return 1;
3624}
3625
1da177e4
LT		 3626static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3627{
91ba2eee 3628 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3629 struct nfs4_link_arg arg = {
3630 .fh = NFS_FH(inode),
3631 .dir_fh = NFS_FH(dir),
3632 .name = name,
91ba2eee
TM		 3633 .bitmask = server->attr_bitmask,
3634 };
91ba2eee
TM		 3635 struct nfs4_link_res res = {
3636 .server = server,
1775fd3e 3637 .label = NULL,
1da177e4 3638 };
1da177e4
LT		 3639 struct rpc_message msg = {
3640 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3641 .rpc_argp = &arg,
91ba2eee 3642 .rpc_resp = &res,
1da177e4 3643 };
136f2627
TM		 3644 int status = -ENOMEM;
3645
3646 res.fattr = nfs_alloc_fattr();
778d2817 3647 if (res.fattr == NULL)
136f2627 3648 goto out;
1da177e4 3649
14c43f76
DQ		 3650 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3651 if (IS_ERR(res.label)) {
3652 status = PTR_ERR(res.label);
3653 goto out;
3654 }
aa9c2669 3655 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3656
7c513058 3657 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3658 if (!status) {
3659 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3660 status = nfs_post_op_update_inode(inode, res.fattr);
3661 if (!status)
3662 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3663 }
14c43f76
DQ		 3664
3665
3666 nfs4_label_free(res.label);
3667
136f2627 3668out:
136f2627 3669 nfs_free_fattr(res.fattr);
1da177e4
LT		 3670 return status;
3671}
3672
3673static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3674{
3675 struct nfs4_exception exception = { };
3676 int err;
3677 do {
3678 err = nfs4_handle_exception(NFS_SERVER(inode),
3679 _nfs4_proc_link(inode, dir, name),
3680 &exception);
3681 } while (exception.retry);
3682 return err;
3683}
3684
57dc9a57
TM		 3685struct nfs4_createdata {
3686 struct rpc_message msg;
3687 struct nfs4_create_arg arg;
3688 struct nfs4_create_res res;
3689 struct nfs_fh fh;
3690 struct nfs_fattr fattr;
1775fd3e 3691 struct nfs4_label *label;
57dc9a57
TM		 3692};
3693
3694static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3695 struct qstr *name, struct iattr *sattr, u32 ftype)
3696{
3697 struct nfs4_createdata *data;
3698
3699 data = kzalloc(sizeof(*data), GFP_KERNEL);
3700 if (data != NULL) {
3701 struct nfs_server *server = NFS_SERVER(dir);
3702
14c43f76
DQ		 3703 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3704 if (IS_ERR(data->label))
3705 goto out_free;
3706
57dc9a57
TM		 3707 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3708 data->msg.rpc_argp = &data->arg;
3709 data->msg.rpc_resp = &data->res;
3710 data->arg.dir_fh = NFS_FH(dir);
3711 data->arg.server = server;
3712 data->arg.name = name;
3713 data->arg.attrs = sattr;
3714 data->arg.ftype = ftype;
aa9c2669 3715 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3716 data->res.server = server;
3717 data->res.fh = &data->fh;
3718 data->res.fattr = &data->fattr;
1775fd3e 3719 data->res.label = data->label;
57dc9a57 3720 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3721 }
3722 return data;
14c43f76
DQ		 3723out_free:
3724 kfree(data);
3725 return NULL;
57dc9a57
TM		 3726}
3727
3728static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3729{
7c513058 3730 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3731 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3732 if (status == 0) {
3733 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3734 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3735 }
3736 return status;
3737}
3738
3739static void nfs4_free_createdata(struct nfs4_createdata *data)
3740{
14c43f76 3741 nfs4_label_free(data->label);
57dc9a57
TM		 3742 kfree(data);
3743}
3744
4f390c15 3745static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3746 struct page *page, unsigned int len, struct iattr *sattr,
3747 struct nfs4_label *label)
1da177e4 3748{
57dc9a57
TM		 3749 struct nfs4_createdata *data;
3750 int status = -ENAMETOOLONG;
1da177e4 3751
94a6d753 3752 if (len > NFS4_MAXPATHLEN)
57dc9a57 3753 goto out;
4f390c15 3754
57dc9a57
TM		 3755 status = -ENOMEM;
3756 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3757 if (data == NULL)
3758 goto out;
3759
3760 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3761 data->arg.u.symlink.pages = &page;
3762 data->arg.u.symlink.len = len;
1775fd3e 3763 data->arg.label = label;
1da177e4 3764
57dc9a57
TM		 3765 status = nfs4_do_create(dir, dentry, data);
3766
3767 nfs4_free_createdata(data);
3768out:
1da177e4
LT		 3769 return status;
3770}
3771
4f390c15 3772static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3773 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3774{
3775 struct nfs4_exception exception = { };
aa9c2669 3776 struct nfs4_label l, *label = NULL;
1da177e4 3777 int err;
aa9c2669
DQ		 3778
3779 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3780
1da177e4 3781 do {
078ea3df
TM		 3782 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3783 trace_nfs4_symlink(dir, &dentry->d_name, err);
3784 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3785 &exception);
3786 } while (exception.retry);
aa9c2669
DQ		 3787
3788 nfs4_label_release_security(label);
1da177e4
LT		 3789 return err;
3790}
3791
3792static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3793 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3794{
57dc9a57
TM		 3795 struct nfs4_createdata *data;
3796 int status = -ENOMEM;
1da177e4 3797
57dc9a57
TM		 3798 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3799 if (data == NULL)
3800 goto out;
3801
1775fd3e 3802 data->arg.label = label;
57dc9a57
TM		 3803 status = nfs4_do_create(dir, dentry, data);
3804
3805 nfs4_free_createdata(data);
3806out:
1da177e4
LT		 3807 return status;
3808}
3809
3810static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3811 struct iattr *sattr)
3812{
3813 struct nfs4_exception exception = { };
aa9c2669 3814 struct nfs4_label l, *label = NULL;
1da177e4 3815 int err;
a8a5da99 3816
aa9c2669
DQ		 3817 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3818
a8a5da99 3819 sattr->ia_mode &= ~current_umask();
1da177e4 3820 do {
078ea3df
TM		 3821 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3822 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3823 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3824 &exception);
3825 } while (exception.retry);
aa9c2669
DQ		 3826 nfs4_label_release_security(label);
3827
1da177e4
LT		 3828 return err;
3829}
3830
3831static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3832 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3833{
3834 struct inode *dir = dentry->d_inode;
3835 struct nfs4_readdir_arg args = {
3836 .fh = NFS_FH(dir),
56e4ebf8 3837 .pages = pages,
1da177e4
LT		 3838 .pgbase = 0,
3839 .count = count,
96d25e53 3840 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3841 .plus = plus,
1da177e4
LT		 3842 };
3843 struct nfs4_readdir_res res;
3844 struct rpc_message msg = {
3845 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3846 .rpc_argp = &args,
3847 .rpc_resp = &res,
3848 .rpc_cred = cred,
3849 };
3850 int status;
3851
6de1472f
AV		 3852 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3853 dentry,
eadf4598 3854 (unsigned long long)cookie);
c3f52af3 3855 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3856 res.pgbase = args.pgbase;
7c513058 3857 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3858 if (status >= 0) {
c3f52af3 3859 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3860 status += args.pgbase;
3861 }
c4812998
TM		 3862
3863 nfs_invalidate_atime(dir);
3864
3110ff80 3865 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3866 return status;
3867}
3868
3869static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3870 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3871{
3872 struct nfs4_exception exception = { };
3873 int err;
3874 do {
c1578b76
TM		 3875 err = _nfs4_proc_readdir(dentry, cred, cookie,
3876 pages, count, plus);
3877 trace_nfs4_readdir(dentry->d_inode, err);
3878 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3879 &exception);
3880 } while (exception.retry);
3881 return err;
3882}
3883
3884static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3885 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3886{
57dc9a57
TM		 3887 struct nfs4_createdata *data;
3888 int mode = sattr->ia_mode;
3889 int status = -ENOMEM;
1da177e4 3890
57dc9a57
TM		 3891 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3892 if (data == NULL)
3893 goto out;
3894
1da177e4 3895 if (S_ISFIFO(mode))
57dc9a57 3896 data->arg.ftype = NF4FIFO;
1da177e4 3897 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3898 data->arg.ftype = NF4BLK;
3899 data->arg.u.device.specdata1 = MAJOR(rdev);
3900 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3901 }
3902 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3903 data->arg.ftype = NF4CHR;
3904 data->arg.u.device.specdata1 = MAJOR(rdev);
3905 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3906 } else if (!S_ISSOCK(mode)) {
3907 status = -EINVAL;
3908 goto out_free;
1da177e4 3909 }
1775fd3e 3910
aa9c2669 3911 data->arg.label = label;
57dc9a57 3912 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3913out_free:
57dc9a57
TM		 3914 nfs4_free_createdata(data);
3915out:
1da177e4
LT		 3916 return status;
3917}
3918
3919static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3920 struct iattr *sattr, dev_t rdev)
3921{
3922 struct nfs4_exception exception = { };
aa9c2669 3923 struct nfs4_label l, *label = NULL;
1da177e4 3924 int err;
a8a5da99 3925
aa9c2669
DQ		 3926 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3927
a8a5da99 3928 sattr->ia_mode &= ~current_umask();
1da177e4 3929 do {
078ea3df
TM		 3930 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3931 trace_nfs4_mknod(dir, &dentry->d_name, err);
3932 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3933 &exception);
3934 } while (exception.retry);
aa9c2669
DQ		 3935
3936 nfs4_label_release_security(label);
3937
1da177e4
LT		 3938 return err;
3939}
3940
3941static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3942 struct nfs_fsstat *fsstat)
3943{
3944 struct nfs4_statfs_arg args = {
3945 .fh = fhandle,
3946 .bitmask = server->attr_bitmask,
3947 };
24ad148a
BH		 3948 struct nfs4_statfs_res res = {
3949 .fsstat = fsstat,
3950 };
1da177e4
LT		 3951 struct rpc_message msg = {
3952 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3953 .rpc_argp = &args,
24ad148a 3954 .rpc_resp = &res,
1da177e4
LT		 3955 };
3956
0e574af1 3957 nfs_fattr_init(fsstat->fattr);
7c513058 3958 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3959}
3960
3961static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3962{
3963 struct nfs4_exception exception = { };
3964 int err;
3965 do {
3966 err = nfs4_handle_exception(server,
3967 _nfs4_proc_statfs(server, fhandle, fsstat),
3968 &exception);
3969 } while (exception.retry);
3970 return err;
3971}
3972
3973static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3974 struct nfs_fsinfo *fsinfo)
3975{
3976 struct nfs4_fsinfo_arg args = {
3977 .fh = fhandle,
3978 .bitmask = server->attr_bitmask,
3979 };
3dda5e43
BH		 3980 struct nfs4_fsinfo_res res = {
3981 .fsinfo = fsinfo,
3982 };
1da177e4
LT		 3983 struct rpc_message msg = {
3984 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3985 .rpc_argp = &args,
3dda5e43 3986 .rpc_resp = &res,
1da177e4
LT		 3987 };
3988
7c513058 3989 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3990}
3991
3992static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3993{
3994 struct nfs4_exception exception = { };
83ca7f5a 3995 unsigned long now = jiffies;
1da177e4
LT		 3996 int err;
3997
3998 do {
83ca7f5a 3999 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4000 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4001 if (err == 0) {
4002 struct nfs_client *clp = server->nfs_client;
4003
4004 spin_lock(&clp->cl_lock);
4005 clp->cl_lease_time = fsinfo->lease_time * HZ;
4006 clp->cl_last_renewal = now;
4007 spin_unlock(&clp->cl_lock);
4008 break;
4009 }
4010 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4011 } while (exception.retry);
4012 return err;
4013}
4014
4015static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4016{
e38eb650
BS		 4017 int error;
4018
0e574af1 4019 nfs_fattr_init(fsinfo->fattr);
e38eb650 4020 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4021 if (error == 0) {
4022 /* block layout checks this! */
4023 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4024 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4025 }
e38eb650
BS		 4026
4027 return error;
1da177e4
LT		 4028}
4029
4030static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4031 struct nfs_pathconf *pathconf)
4032{
4033 struct nfs4_pathconf_arg args = {
4034 .fh = fhandle,
4035 .bitmask = server->attr_bitmask,
4036 };
d45b2989
BH		 4037 struct nfs4_pathconf_res res = {
4038 .pathconf = pathconf,
4039 };
1da177e4
LT		 4040 struct rpc_message msg = {
4041 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4042 .rpc_argp = &args,
d45b2989 4043 .rpc_resp = &res,
1da177e4
LT		 4044 };
4045
4046 /* None of the pathconf attributes are mandatory to implement */
4047 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4048 memset(pathconf, 0, sizeof(*pathconf));
4049 return 0;
4050 }
4051
0e574af1 4052 nfs_fattr_init(pathconf->fattr);
7c513058 4053 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4054}
4055
4056static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4057 struct nfs_pathconf *pathconf)
4058{
4059 struct nfs4_exception exception = { };
4060 int err;
4061
4062 do {
4063 err = nfs4_handle_exception(server,
4064 _nfs4_proc_pathconf(server, fhandle, pathconf),
4065 &exception);
4066 } while (exception.retry);
4067 return err;
4068}
4069
5521abfd 4070int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4071 const struct nfs_open_context *ctx,
4072 const struct nfs_lock_context *l_ctx,
4073 fmode_t fmode)
4074{
4075 const struct nfs_lockowner *lockowner = NULL;
4076
4077 if (l_ctx != NULL)
4078 lockowner = &l_ctx->lockowner;
5521abfd 4079 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4080}
4081EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4082
5521abfd
TM		 4083static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4084 const struct nfs_open_context *ctx,
4085 const struct nfs_lock_context *l_ctx,
4086 fmode_t fmode)
4087{
4088 nfs4_stateid current_stateid;
4089
e1253be0
TM		 4090 /* If the current stateid represents a lost lock, then exit */
4091 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4092 return true;
5521abfd
TM		 4093 return nfs4_stateid_match(stateid, &current_stateid);
4094}
4095
4096static bool nfs4_error_stateid_expired(int err)
4097{
4098 switch (err) {
4099 case -NFS4ERR_DELEG_REVOKED:
4100 case -NFS4ERR_ADMIN_REVOKED:
4101 case -NFS4ERR_BAD_STATEID:
4102 case -NFS4ERR_STALE_STATEID:
4103 case -NFS4ERR_OLD_STATEID:
4104 case -NFS4ERR_OPENMODE:
4105 case -NFS4ERR_EXPIRED:
4106 return true;
4107 }
4108 return false;
4109}
4110
d45f60c6 4111void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4112{
d45f60c6 4113 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4114}
4115
d45f60c6 4116static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4117{
d45f60c6 4118 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4119
d45f60c6
WAA		 4120 trace_nfs4_read(hdr, task->tk_status);
4121 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4122 hdr->args.context->state,
4123 NULL) == -EAGAIN) {
d00c5d43 4124 rpc_restart_call_prepare(task);
ec06c096 4125 return -EAGAIN;
1da177e4 4126 }
8850df99 4127
d45f60c6 4128 __nfs4_read_done_cb(hdr);
1da177e4 4129 if (task->tk_status > 0)
d45f60c6 4130 renew_lease(server, hdr->timestamp);
ec06c096 4131 return 0;
1da177e4
LT		 4132}
4133
5521abfd 4134static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4135 struct nfs_pgio_args *args)
5521abfd
TM		 4136{
4137
4138 if (!nfs4_error_stateid_expired(task->tk_status) ||
4139 nfs4_stateid_is_current(&args->stateid,
4140 args->context,
4141 args->lock_context,
4142 FMODE_READ))
4143 return false;
4144 rpc_restart_call_prepare(task);
4145 return true;
4146}
4147
d45f60c6 4148static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4149{
4150
4151 dprintk("--> %s\n", __func__);
4152
d45f60c6 4153 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4154 return -EAGAIN;
d45f60c6 4155 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4156 return -EAGAIN;
d45f60c6
WAA		 4157 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4158 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4159}
4160
d45f60c6
WAA		 4161static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4162 struct rpc_message *msg)
1da177e4 4163{
d45f60c6
WAA		 4164 hdr->timestamp = jiffies;
4165 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4166 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4167 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4168}
4169
d45f60c6
WAA		 4170static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4171 struct nfs_pgio_header *hdr)
ea7c3303 4172{
d45f60c6
WAA		 4173 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4174 &hdr->args.seq_args,
4175 &hdr->res.seq_res,
9b206149 4176 task))
ef1820f9 4177 return 0;
d45f60c6
WAA		 4178 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4179 hdr->args.lock_context,
4180 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4181 return -EIO;
d45f60c6 4182 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4183 return -EIO;
4184 return 0;
1da177e4
LT		 4185}
4186
d45f60c6
WAA		 4187static int nfs4_write_done_cb(struct rpc_task *task,
4188 struct nfs_pgio_header *hdr)
1da177e4 4189{
d45f60c6 4190 struct inode *inode = hdr->inode;
8478eaa1 4191
d45f60c6
WAA		 4192 trace_nfs4_write(hdr, task->tk_status);
4193 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4194 hdr->args.context->state,
4195 NULL) == -EAGAIN) {
d00c5d43 4196 rpc_restart_call_prepare(task);
788e7a89 4197 return -EAGAIN;
1da177e4 4198 }
4f9838c7 4199 if (task->tk_status >= 0) {
d45f60c6
WAA		 4200 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4201 nfs_post_op_update_inode_force_wcc(inode, &hdr->fattr);
4f9838c7 4202 }
788e7a89 4203 return 0;
1da177e4
LT		 4204}
4205
5521abfd 4206static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4207 struct nfs_pgio_args *args)
5521abfd
TM		 4208{
4209
4210 if (!nfs4_error_stateid_expired(task->tk_status) ||
4211 nfs4_stateid_is_current(&args->stateid,
4212 args->context,
4213 args->lock_context,
4214 FMODE_WRITE))
4215 return false;
4216 rpc_restart_call_prepare(task);
4217 return true;
4218}
4219
d45f60c6 4220static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4221{
d45f60c6 4222 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4223 return -EAGAIN;
d45f60c6 4224 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4225 return -EAGAIN;
d45f60c6
WAA		 4226 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4227 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4228}
4229
5a37f851 4230static
d45f60c6 4231bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4232{
5a37f851 4233 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4234 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4235 return false;
4236 /* Otherwise, request attributes if and only if we don't hold
4237 * a delegation
4238 */
011e2a7f 4239 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4240}
a69aef14 4241
d45f60c6
WAA		 4242static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4243 struct rpc_message *msg)
1da177e4 4244{
d45f60c6 4245 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4246
d45f60c6
WAA		 4247 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4248 hdr->args.bitmask = NULL;
4249 hdr->res.fattr = NULL;
7ffd1064 4250 } else
d45f60c6 4251 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4252
d45f60c6
WAA		 4253 if (!hdr->pgio_done_cb)
4254 hdr->pgio_done_cb = nfs4_write_done_cb;
4255 hdr->res.server = server;
4256 hdr->timestamp = jiffies;
1da177e4 4257
bdc7f021 4258 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4259 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4260}
4261
0b7c0153 4262static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4263{
d9afbd1b
TM		 4264 nfs4_setup_sequence(NFS_SERVER(data->inode),
4265 &data->args.seq_args,
4266 &data->res.seq_res,
4267 task);
1da177e4
LT		 4268}
4269
0b7c0153 4270static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4271{
1da177e4 4272 struct inode *inode = data->inode;
14516c3a 4273
cc668ab3 4274 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4275 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4276 NULL, NULL) == -EAGAIN) {
d00c5d43 4277 rpc_restart_call_prepare(task);
788e7a89 4278 return -EAGAIN;
1da177e4 4279 }
788e7a89 4280 return 0;
1da177e4
LT		 4281}
4282
0b7c0153 4283static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4284{
4285 if (!nfs4_sequence_done(task, &data->res.seq_res))
4286 return -EAGAIN;
0b7c0153 4287 return data->commit_done_cb(task, data);
5f452431
FI		 4288}
4289
0b7c0153 4290static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4291{
788e7a89 4292 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4293
0b7c0153
FI		 4294 if (data->commit_done_cb == NULL)
4295 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4296 data->res.server = server;
bdc7f021 4297 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4298 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4299}
4300
9bc4e3ca
CL		 4301struct nfs4_renewdata {
4302 struct nfs_client *client;
4303 unsigned long timestamp;
4304};
4305
1da177e4
LT		 4306/*
4307 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4308 * standalone procedure for queueing an asynchronous RENEW.
4309 */
9bc4e3ca 4310static void nfs4_renew_release(void *calldata)
dc96aef9 4311{
9bc4e3ca
CL		 4312 struct nfs4_renewdata *data = calldata;
4313 struct nfs_client *clp = data->client;
dc96aef9 4314
0851de06
AB		 4315 if (atomic_read(&clp->cl_count) > 1)
4316 nfs4_schedule_state_renewal(clp);
4317 nfs_put_client(clp);
9bc4e3ca 4318 kfree(data);
dc96aef9
AB		 4319}
4320
9bc4e3ca 4321static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4322{
9bc4e3ca
CL		 4323 struct nfs4_renewdata *data = calldata;
4324 struct nfs_client *clp = data->client;
4325 unsigned long timestamp = data->timestamp;
1da177e4 4326
c6d01c6f 4327 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4328 switch (task->tk_status) {
4329 case 0:
4330 break;
4331 case -NFS4ERR_LEASE_MOVED:
4332 nfs4_schedule_lease_moved_recovery(clp);
4333 break;
4334 default:
95baa25c 4335 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4336 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4337 return;
4338 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4339 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4340 return;
4341 }
4342 nfs4_schedule_path_down_recovery(clp);
1da177e4 4343 }
452e9352 4344 do_renew_lease(clp, timestamp);
1da177e4
LT		 4345}
4346
963d8fe5
TM		 4347static const struct rpc_call_ops nfs4_renew_ops = {
4348 .rpc_call_done = nfs4_renew_done,
dc96aef9 4349 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4350};
4351
2f60ea6b 4352static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4353{
4354 struct rpc_message msg = {
4355 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4356 .rpc_argp = clp,
b4454fe1 4357 .rpc_cred = cred,
1da177e4 4358 };
9bc4e3ca 4359 struct nfs4_renewdata *data;
1da177e4 4360
2f60ea6b
TM		 4361 if (renew_flags == 0)
4362 return 0;
0851de06
AB		 4363 if (!atomic_inc_not_zero(&clp->cl_count))
4364 return -EIO;
b569ad34 4365 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4366 if (data == NULL)
4367 return -ENOMEM;
4368 data->client = clp;
4369 data->timestamp = jiffies;
bc7a05ca 4370 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4371 &nfs4_renew_ops, data);
1da177e4
LT		 4372}
4373
8534d4ec 4374static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4375{
4376 struct rpc_message msg = {
4377 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4378 .rpc_argp = clp,
b4454fe1 4379 .rpc_cred = cred,
1da177e4
LT		 4380 };
4381 unsigned long now = jiffies;
4382 int status;
4383
bc7a05ca 4384 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4385 if (status < 0)
4386 return status;
452e9352 4387 do_renew_lease(clp, now);
1da177e4
LT		 4388 return 0;
4389}
4390
aa1870af
BF		 4391static inline int nfs4_server_supports_acls(struct nfs_server *server)
4392{
7dd7d959 4393 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4394}
4395
21f498c2
TM		 4396/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4397 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4398 * the stack.
4399 */
21f498c2 4400#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4401
e9e3d724
NH		 4402static int buf_to_pages_noslab(const void *buf, size_t buflen,
4403 struct page **pages, unsigned int *pgbase)
4404{
4405 struct page *newpage, **spages;
4406 int rc = 0;
4407 size_t len;
4408 spages = pages;
4409
4410 do {
21f498c2 4411 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4412 newpage = alloc_page(GFP_KERNEL);
4413
4414 if (newpage == NULL)
4415 goto unwind;
4416 memcpy(page_address(newpage), buf, len);
4417 buf += len;
4418 buflen -= len;
4419 *pages++ = newpage;
4420 rc++;
4421 } while (buflen != 0);
4422
4423 return rc;
4424
4425unwind:
4426 for(; rc > 0; rc--)
4427 __free_page(spages[rc-1]);
4428 return -ENOMEM;
4429}
4430
e50a1c2e
BF		 4431struct nfs4_cached_acl {
4432 int cached;
4433 size_t len;
3e9d4154 4434 char data[0];
e50a1c2e
BF		 4435};
4436
4437static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4438{
4439 struct nfs_inode *nfsi = NFS_I(inode);
4440
4441 spin_lock(&inode->i_lock);
4442 kfree(nfsi->nfs4_acl);
4443 nfsi->nfs4_acl = acl;
4444 spin_unlock(&inode->i_lock);
4445}
4446
4447static void nfs4_zap_acl_attr(struct inode *inode)
4448{
4449 nfs4_set_cached_acl(inode, NULL);
4450}
4451
4452static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4453{
4454 struct nfs_inode *nfsi = NFS_I(inode);
4455 struct nfs4_cached_acl *acl;
4456 int ret = -ENOENT;
4457
4458 spin_lock(&inode->i_lock);
4459 acl = nfsi->nfs4_acl;
4460 if (acl == NULL)
4461 goto out;
4462 if (buf == NULL) /* user is just asking for length */
4463 goto out_len;
4464 if (acl->cached == 0)
4465 goto out;
4466 ret = -ERANGE; /* see getxattr(2) man page */
4467 if (acl->len > buflen)
4468 goto out;
4469 memcpy(buf, acl->data, acl->len);
4470out_len:
4471 ret = acl->len;
4472out:
4473 spin_unlock(&inode->i_lock);
4474 return ret;
4475}
4476
5794d21e 4477static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4478{
4479 struct nfs4_cached_acl *acl;
b291f1b1 4480 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4481
1f1ea6c2 4482 if (buflen <= PAGE_SIZE) {
b291f1b1 4483 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4484 if (acl == NULL)
4485 goto out;
4486 acl->cached = 1;
5794d21e 4487 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4488 } else {
4489 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4490 if (acl == NULL)
4491 goto out;
4492 acl->cached = 0;
4493 }
4494 acl->len = acl_len;
4495out:
4496 nfs4_set_cached_acl(inode, acl);
4497}
4498
bf118a34
AA		 4499/*
4500 * The getxattr API returns the required buffer length when called with a
4501 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4502 * the required buf. On a NULL buf, we send a page of data to the server
4503 * guessing that the ACL request can be serviced by a page. If so, we cache
4504 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4505 * the cache. If not so, we throw away the page, and cache the required
4506 * length. The next getxattr call will then produce another round trip to
4507 * the server, this time with the input buf of the required size.
4508 */
16b4289c 4509static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4510{
bf118a34 4511 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4512 struct nfs_getaclargs args = {
4513 .fh = NFS_FH(inode),
4514 .acl_pages = pages,
4515 .acl_len = buflen,
4516 };
663c79b3
BH		 4517 struct nfs_getaclres res = {
4518 .acl_len = buflen,
4519 };
aa1870af
BF		 4520 struct rpc_message msg = {
4521 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4522 .rpc_argp = &args,
663c79b3 4523 .rpc_resp = &res,
aa1870af 4524 };
21f498c2
TM		 4525 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4526 int ret = -ENOMEM, i;
aa1870af 4527
bf118a34
AA		 4528 /* As long as we're doing a round trip to the server anyway,
4529 * let's be prepared for a page of acl data. */
4530 if (npages == 0)
4531 npages = 1;
21f498c2
TM		 4532 if (npages > ARRAY_SIZE(pages))
4533 return -ERANGE;
5a006899 4534
bf118a34
AA		 4535 for (i = 0; i < npages; i++) {
4536 pages[i] = alloc_page(GFP_KERNEL);
4537 if (!pages[i])
4538 goto out_free;
e50a1c2e 4539 }
5a006899
SP		 4540
4541 /* for decoding across pages */
4542 res.acl_scratch = alloc_page(GFP_KERNEL);
4543 if (!res.acl_scratch)
4544 goto out_free;
4545
bf118a34
AA		 4546 args.acl_len = npages * PAGE_SIZE;
4547 args.acl_pgbase = 0;
5a006899 4548
de040bec 4549 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4550 __func__, buf, buflen, npages, args.acl_len);
4551 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4552 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4553 if (ret)
4554 goto out_free;
bf118a34 4555
1f1ea6c2
TM		 4556 /* Handle the case where the passed-in buffer is too short */
4557 if (res.acl_flags & NFS4_ACL_TRUNC) {
4558 /* Did the user only issue a request for the acl length? */
4559 if (buf == NULL)
4560 goto out_ok;
e50a1c2e 4561 ret = -ERANGE;
1f1ea6c2 4562 goto out_free;
e50a1c2e 4563 }
1f1ea6c2 4564 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4565 if (buf) {
4566 if (res.acl_len > buflen) {
4567 ret = -ERANGE;
4568 goto out_free;
4569 }
1f1ea6c2 4570 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4571 }
1f1ea6c2
TM		 4572out_ok:
4573 ret = res.acl_len;
e50a1c2e 4574out_free:
bf118a34
AA		 4575 for (i = 0; i < npages; i++)
4576 if (pages[i])
4577 __free_page(pages[i]);
331818f1
TM		 4578 if (res.acl_scratch)
4579 __free_page(res.acl_scratch);
aa1870af
BF		 4580 return ret;
4581}
4582
16b4289c
TM		 4583static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4584{
4585 struct nfs4_exception exception = { };
4586 ssize_t ret;
4587 do {
4588 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4589 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4590 if (ret >= 0)
4591 break;
4592 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4593 } while (exception.retry);
4594 return ret;
4595}
4596
e50a1c2e
BF		 4597static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4598{
4599 struct nfs_server *server = NFS_SERVER(inode);
4600 int ret;
4601
4602 if (!nfs4_server_supports_acls(server))
4603 return -EOPNOTSUPP;
4604 ret = nfs_revalidate_inode(server, inode);
4605 if (ret < 0)
4606 return ret;
08a22b39
AK		 4607 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4608 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4609 ret = nfs4_read_cached_acl(inode, buf, buflen);
4610 if (ret != -ENOENT)
bf118a34
AA		 4611 /* -ENOENT is returned if there is no ACL or if there is an ACL
4612 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4613 return ret;
4614 return nfs4_get_acl_uncached(inode, buf, buflen);
4615}
4616
16b4289c 4617static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4618{
4619 struct nfs_server *server = NFS_SERVER(inode);
4620 struct page *pages[NFS4ACL_MAXPAGES];
4621 struct nfs_setaclargs arg = {
4622 .fh = NFS_FH(inode),
4623 .acl_pages = pages,
4624 .acl_len = buflen,
4625 };
73c403a9 4626 struct nfs_setaclres res;
4b580ee3
BF		 4627 struct rpc_message msg = {
4628 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4629 .rpc_argp = &arg,
73c403a9 4630 .rpc_resp = &res,
4b580ee3 4631 };
21f498c2 4632 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4633 int ret, i;
4b580ee3
BF		 4634
4635 if (!nfs4_server_supports_acls(server))
4636 return -EOPNOTSUPP;
21f498c2
TM		 4637 if (npages > ARRAY_SIZE(pages))
4638 return -ERANGE;
e9e3d724
NH		 4639 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4640 if (i < 0)
4641 return i;
57ec14c5 4642 nfs4_inode_return_delegation(inode);
7c513058 4643 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4644
4645 /*
4646 * Free each page after tx, so the only ref left is
4647 * held by the network stack
4648 */
4649 for (; i > 0; i--)
4650 put_page(pages[i-1]);
4651
08a22b39
AK		 4652 /*
4653 * Acl update can result in inode attribute update.
4654 * so mark the attribute cache invalid.
4655 */
4656 spin_lock(&inode->i_lock);
4657 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4658 spin_unlock(&inode->i_lock);
f41f7418
TM		 4659 nfs_access_zap_cache(inode);
4660 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4661 return ret;
4662}
4663
16b4289c
TM		 4664static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4665{
4666 struct nfs4_exception exception = { };
4667 int err;
4668 do {
c1578b76
TM		 4669 err = __nfs4_proc_set_acl(inode, buf, buflen);
4670 trace_nfs4_set_acl(inode, err);
4671 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4672 &exception);
4673 } while (exception.retry);
4674 return err;
4675}
4676
aa9c2669
DQ		 4677#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4678static int _nfs4_get_security_label(struct inode *inode, void *buf,
4679 size_t buflen)
4680{
4681 struct nfs_server *server = NFS_SERVER(inode);
4682 struct nfs_fattr fattr;
4683 struct nfs4_label label = {0, 0, buflen, buf};
4684
4685 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4686 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4687 .fh = NFS_FH(inode),
4688 .bitmask = bitmask,
4689 };
4690 struct nfs4_getattr_res res = {
4691 .fattr = &fattr,
4692 .label = &label,
4693 .server = server,
4694 };
4695 struct rpc_message msg = {
4696 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4697 .rpc_argp = &arg,
aa9c2669
DQ		 4698 .rpc_resp = &res,
4699 };
4700 int ret;
4701
4702 nfs_fattr_init(&fattr);
4703
fcb63a9b 4704 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4705 if (ret)
4706 return ret;
4707 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4708 return -ENOENT;
4709 if (buflen < label.len)
4710 return -ERANGE;
4711 return 0;
4712}
4713
4714static int nfs4_get_security_label(struct inode *inode, void *buf,
4715 size_t buflen)
4716{
4717 struct nfs4_exception exception = { };
4718 int err;
4719
4720 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4721 return -EOPNOTSUPP;
4722
4723 do {
c1578b76
TM		 4724 err = _nfs4_get_security_label(inode, buf, buflen);
4725 trace_nfs4_get_security_label(inode, err);
4726 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4727 &exception);
4728 } while (exception.retry);
4729 return err;
4730}
4731
4732static int _nfs4_do_set_security_label(struct inode *inode,
4733 struct nfs4_label *ilabel,
4734 struct nfs_fattr *fattr,
4735 struct nfs4_label *olabel)
4736{
4737
4738 struct iattr sattr = {0};
4739 struct nfs_server *server = NFS_SERVER(inode);
4740 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4741 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4742 .fh = NFS_FH(inode),
4743 .iap = &sattr,
4744 .server = server,
4745 .bitmask = bitmask,
4746 .label = ilabel,
4747 };
4748 struct nfs_setattrres res = {
4749 .fattr = fattr,
4750 .label = olabel,
4751 .server = server,
4752 };
4753 struct rpc_message msg = {
4754 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4755 .rpc_argp = &arg,
aa9c2669
DQ		 4756 .rpc_resp = &res,
4757 };
4758 int status;
4759
12207f69 4760 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4761
12207f69 4762 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4763 if (status)
4764 dprintk("%s failed: %d\n", __func__, status);
4765
4766 return status;
4767}
4768
4769static int nfs4_do_set_security_label(struct inode *inode,
4770 struct nfs4_label *ilabel,
4771 struct nfs_fattr *fattr,
4772 struct nfs4_label *olabel)
4773{
4774 struct nfs4_exception exception = { };
4775 int err;
4776
4777 do {
c1578b76
TM		 4778 err = _nfs4_do_set_security_label(inode, ilabel,
4779 fattr, olabel);
4780 trace_nfs4_set_security_label(inode, err);
4781 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4782 &exception);
4783 } while (exception.retry);
4784 return err;
4785}
4786
4787static int
4788nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4789{
4790 struct nfs4_label ilabel, *olabel = NULL;
4791 struct nfs_fattr fattr;
4792 struct rpc_cred *cred;
4793 struct inode *inode = dentry->d_inode;
4794 int status;
4795
4796 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4797 return -EOPNOTSUPP;
4798
4799 nfs_fattr_init(&fattr);
4800
4801 ilabel.pi = 0;
4802 ilabel.lfs = 0;
4803 ilabel.label = (char *)buf;
4804 ilabel.len = buflen;
4805
4806 cred = rpc_lookup_cred();
4807 if (IS_ERR(cred))
4808 return PTR_ERR(cred);
4809
4810 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4811 if (IS_ERR(olabel)) {
4812 status = -PTR_ERR(olabel);
4813 goto out;
4814 }
4815
4816 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4817 if (status == 0)
4818 nfs_setsecurity(inode, &fattr, olabel);
4819
4820 nfs4_label_free(olabel);
4821out:
4822 put_rpccred(cred);
4823 return status;
4824}
4825#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4826
4827
1da177e4 4828static int
8478eaa1
N		 4829nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4830 struct nfs4_state *state, long *timeout)
1da177e4 4831{
aa5190d0
TM		 4832 struct nfs_client *clp = server->nfs_client;
4833
4834 if (task->tk_status >= 0)
1da177e4
LT		 4835 return 0;
4836 switch(task->tk_status) {
a1d0b5ee 4837 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4838 case -NFS4ERR_ADMIN_REVOKED:
4839 case -NFS4ERR_BAD_STATEID:
4840 case -NFS4ERR_OPENMODE:
4841 if (state == NULL)
4842 break;
5d422301 4843 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4844 goto recovery_failed;
0400a6b0 4845 goto wait_on_recovery;
0ced63d1 4846 case -NFS4ERR_EXPIRED:
5d422301
TM		 4847 if (state != NULL) {
4848 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4849 goto recovery_failed;
5d422301 4850 }
1da177e4 4851 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4852 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4853 nfs4_schedule_lease_recovery(clp);
4854 goto wait_on_recovery;
519ae255
CL		 4855 case -NFS4ERR_MOVED:
4856 if (nfs4_schedule_migration_recovery(server) < 0)
4857 goto recovery_failed;
4858 goto wait_on_recovery;
8ef2f8d4
CL		 4859 case -NFS4ERR_LEASE_MOVED:
4860 nfs4_schedule_lease_moved_recovery(clp);
4861 goto wait_on_recovery;
4745e315
AA		 4862#if defined(CONFIG_NFS_V4_1)
4863 case -NFS4ERR_BADSESSION:
4864 case -NFS4ERR_BADSLOT:
4865 case -NFS4ERR_BAD_HIGH_SLOT:
4866 case -NFS4ERR_DEADSESSION:
4867 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4868 case -NFS4ERR_SEQ_FALSE_RETRY:
4869 case -NFS4ERR_SEQ_MISORDERED:
4870 dprintk("%s ERROR %d, Reset session\n", __func__,
4871 task->tk_status);
9f594791 4872 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4873 goto wait_on_recovery;
4745e315 4874#endif /* CONFIG_NFS_V4_1 */
1da177e4 4875 case -NFS4ERR_DELAY:
aa5190d0 4876 nfs_inc_server_stats(server, NFSIOS_DELAY);
8478eaa1
N		 4877 rpc_delay(task, nfs4_update_delay(timeout));
4878 goto restart_call;
006ea73e 4879 case -NFS4ERR_GRACE:
1da177e4 4880 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4881 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4882 case -NFS4ERR_OLD_STATEID:
f1478c13 4883 goto restart_call;
1da177e4
LT		 4884 }
4885 task->tk_status = nfs4_map_errors(task->tk_status);
4886 return 0;
9f51a78e 4887recovery_failed:
5d422301
TM		 4888 task->tk_status = -EIO;
4889 return 0;
0400a6b0 4890wait_on_recovery:
a2c0b9e2 4891 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4892 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4893 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4894 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4895 goto recovery_failed;
f1478c13 4896restart_call:
a2c0b9e2
TM		 4897 task->tk_status = 0;
4898 return -EAGAIN;
1da177e4
LT		 4899}
4900
f092075d
CL		 4901static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4902 nfs4_verifier *bootverf)
cd93710e
CL		 4903{
4904 __be32 verf[2];
4905
2c820d9a
CL		 4906 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4907 /* An impossible timestamp guarantees this value
4908 * will never match a generated boot time. */
4909 verf[0] = 0;
17f26b12 4910 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4911 } else {
f092075d 4912 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4913 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4914 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4915 }
cd93710e
CL		 4916 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4917}
4918
e984a55a
CL		 4919static unsigned int
4920nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4921 char *buf, size_t len)
4922{
4923 unsigned int result;
4924
4925 rcu_read_lock();
4926 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4927 clp->cl_ipaddr,
4928 rpc_peeraddr2str(clp->cl_rpcclient,
4929 RPC_DISPLAY_ADDR),
4930 rpc_peeraddr2str(clp->cl_rpcclient,
4931 RPC_DISPLAY_PROTO));
4932 rcu_read_unlock();
4933 return result;
4934}
4935
4936static unsigned int
4937nfs4_init_uniform_client_string(const struct nfs_client *clp,
4938 char *buf, size_t len)
4939{
55b59293 4940 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4941
4942 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4943 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4944 clp->rpc_ops->version,
4945 clp->cl_minorversion,
4946 nfs4_client_id_uniquifier,
4947 nodename);
e984a55a
CL		 4948 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4949 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4950 nodename);
e984a55a
CL		 4951}
4952
706cb8db
CL		 4953/*
4954 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
4955 * services. Advertise one based on the address family of the
4956 * clientaddr.
4957 */
4958static unsigned int
4959nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
4960{
4961 if (strchr(clp->cl_ipaddr, ':') != NULL)
4962 return scnprintf(buf, len, "tcp6");
4963 else
4964 return scnprintf(buf, len, "tcp");
4965}
4966
f11b2a1c
JL		 4967static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
4968{
4969 struct nfs4_setclientid *sc = calldata;
4970
4971 if (task->tk_status == 0)
4972 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
4973}
4974
4975static const struct rpc_call_ops nfs4_setclientid_ops = {
4976 .rpc_call_done = nfs4_setclientid_done,
4977};
4978
6bbb4ae8
CL		 4979/**
4980 * nfs4_proc_setclientid - Negotiate client ID
4981 * @clp: state data structure
4982 * @program: RPC program for NFSv4 callback service
4983 * @port: IP port number for NFS4 callback service
4984 * @cred: RPC credential to use for this call
4985 * @res: where to place the result
4986 *
4987 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4988 */
bb8b27e5
TM		 4989int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4990 unsigned short port, struct rpc_cred *cred,
4991 struct nfs4_setclientid_res *res)
1da177e4
LT		 4992{
4993 nfs4_verifier sc_verifier;
4994 struct nfs4_setclientid setclientid = {
4995 .sc_verifier = &sc_verifier,
4996 .sc_prog = program,
f4eecd5d 4997 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4998 };
4999 struct rpc_message msg = {
5000 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5001 .rpc_argp = &setclientid,
bb8b27e5 5002 .rpc_resp = res,
286d7d6a 5003 .rpc_cred = cred,
1da177e4 5004 };
f11b2a1c
JL		 5005 struct rpc_task *task;
5006 struct rpc_task_setup task_setup_data = {
5007 .rpc_client = clp->cl_rpcclient,
5008 .rpc_message = &msg,
5009 .callback_ops = &nfs4_setclientid_ops,
5010 .callback_data = &setclientid,
5011 .flags = RPC_TASK_TIMEOUT,
5012 };
6bbb4ae8 5013 int status;
1da177e4 5014
de734831 5015 /* nfs_client_id4 */
f092075d 5016 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 5017 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5018 setclientid.sc_name_len =
5019 nfs4_init_uniform_client_string(clp,
5020 setclientid.sc_name,
5021 sizeof(setclientid.sc_name));
5022 else
5023 setclientid.sc_name_len =
5024 nfs4_init_nonuniform_client_string(clp,
5025 setclientid.sc_name,
5026 sizeof(setclientid.sc_name));
de734831 5027 /* cb_client4 */
706cb8db
CL		 5028 setclientid.sc_netid_len =
5029 nfs4_init_callback_netid(clp,
5030 setclientid.sc_netid,
5031 sizeof(setclientid.sc_netid));
de734831 5032 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5033 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5034 clp->cl_ipaddr, port >> 8, port & 255);
5035
6bbb4ae8
CL		 5036 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
5037 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5038 setclientid.sc_name_len, setclientid.sc_name);
f11b2a1c
JL		 5039 task = rpc_run_task(&task_setup_data);
5040 if (IS_ERR(task)) {
5041 status = PTR_ERR(task);
5042 goto out;
5043 }
5044 status = task->tk_status;
5045 if (setclientid.sc_cred) {
5046 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5047 put_rpccred(setclientid.sc_cred);
5048 }
5049 rpc_put_task(task);
5050out:
c6d01c6f 5051 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5052 dprintk("NFS reply setclientid: %d\n", status);
5053 return status;
1da177e4
LT		 5054}
5055
6bbb4ae8
CL		 5056/**
5057 * nfs4_proc_setclientid_confirm - Confirm client ID
5058 * @clp: state data structure
5059 * @res: result of a previous SETCLIENTID
5060 * @cred: RPC credential to use for this call
5061 *
5062 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5063 */
fd954ae1 5064int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5065 struct nfs4_setclientid_res *arg,
5066 struct rpc_cred *cred)
1da177e4 5067{
1da177e4
LT		 5068 struct rpc_message msg = {
5069 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5070 .rpc_argp = arg,
286d7d6a 5071 .rpc_cred = cred,
1da177e4 5072 };
1da177e4
LT		 5073 int status;
5074
6bbb4ae8
CL		 5075 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5076 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5077 clp->cl_clientid);
1bd714f2 5078 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5079 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5080 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5081 return status;
5082}
5083
fe650407
TM		 5084struct nfs4_delegreturndata {
5085 struct nfs4_delegreturnargs args;
fa178f29 5086 struct nfs4_delegreturnres res;
fe650407
TM		 5087 struct nfs_fh fh;
5088 nfs4_stateid stateid;
26e976a8 5089 unsigned long timestamp;
fa178f29 5090 struct nfs_fattr fattr;
fe650407 5091 int rpc_status;
039b756a
PT		 5092 struct inode *inode;
5093 bool roc;
5094 u32 roc_barrier;
fe650407
TM		 5095};
5096
fe650407
TM		 5097static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5098{
5099 struct nfs4_delegreturndata *data = calldata;
938e1010 5100
14516c3a
TM		 5101 if (!nfs4_sequence_done(task, &data->res.seq_res))
5102 return;
938e1010 5103
ca8acf8d 5104 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5105 switch (task->tk_status) {
79708861 5106 case 0:
fa178f29 5107 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5108 case -NFS4ERR_ADMIN_REVOKED:
5109 case -NFS4ERR_DELEG_REVOKED:
5110 case -NFS4ERR_BAD_STATEID:
5111 case -NFS4ERR_OLD_STATEID:
5112 case -NFS4ERR_STALE_STATEID:
5113 case -NFS4ERR_EXPIRED:
5114 task->tk_status = 0;
039b756a
PT		 5115 if (data->roc)
5116 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5117 break;
79708861 5118 default:
8478eaa1
N		 5119 if (nfs4_async_handle_error(task, data->res.server,
5120 NULL, NULL) == -EAGAIN) {
d00c5d43 5121 rpc_restart_call_prepare(task);
79708861
RL		 5122 return;
5123 }
5124 }
5125 data->rpc_status = task->tk_status;
fe650407
TM		 5126}
5127
5128static void nfs4_delegreturn_release(void *calldata)
5129{
039b756a
PT		 5130 struct nfs4_delegreturndata *data = calldata;
5131
5132 if (data->roc)
5133 pnfs_roc_release(data->inode);
fe650407
TM		 5134 kfree(calldata);
5135}
5136
938e1010
AA		 5137static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5138{
5139 struct nfs4_delegreturndata *d_data;
5140
5141 d_data = (struct nfs4_delegreturndata *)data;
5142
039b756a
PT		 5143 if (d_data->roc &&
5144 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5145 return;
5146
d9afbd1b
TM		 5147 nfs4_setup_sequence(d_data->res.server,
5148 &d_data->args.seq_args,
5149 &d_data->res.seq_res,
5150 task);
938e1010 5151}
938e1010 5152
c8d149f3 5153static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5154 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5155 .rpc_call_done = nfs4_delegreturn_done,
5156 .rpc_release = nfs4_delegreturn_release,
5157};
5158
e6f81075 5159static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5160{
5161 struct nfs4_delegreturndata *data;
fa178f29 5162 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5163 struct rpc_task *task;
5138fde0
TM		 5164 struct rpc_message msg = {
5165 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5166 .rpc_cred = cred,
5167 };
c970aa85
TM		 5168 struct rpc_task_setup task_setup_data = {
5169 .rpc_client = server->client,
5138fde0 5170 .rpc_message = &msg,
c970aa85
TM		 5171 .callback_ops = &nfs4_delegreturn_ops,
5172 .flags = RPC_TASK_ASYNC,
5173 };
e6f81075 5174 int status = 0;
fe650407 5175
8535b2be 5176 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5177 if (data == NULL)
5178 return -ENOMEM;
a9c92d6b 5179 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5180 data->args.fhandle = &data->fh;
5181 data->args.stateid = &data->stateid;
9e907fec 5182 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5183 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5184 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5185 data->res.fattr = &data->fattr;
5186 data->res.server = server;
5138fde0 5187 nfs_fattr_init(data->res.fattr);
26e976a8 5188 data->timestamp = jiffies;
fe650407 5189 data->rpc_status = 0;
039b756a
PT		 5190 data->inode = inode;
5191 data->roc = list_empty(&NFS_I(inode)->open_files) ?
5192 pnfs_roc(inode) : false;
fe650407 5193
c970aa85 5194 task_setup_data.callback_data = data;
1174dd1f
TM		 5195 msg.rpc_argp = &data->args;
5196 msg.rpc_resp = &data->res;
c970aa85 5197 task = rpc_run_task(&task_setup_data);
7a1218a2 5198 if (IS_ERR(task))
fe650407 5199 return PTR_ERR(task);
e6f81075
TM		 5200 if (!issync)
5201 goto out;
fe650407 5202 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5203 if (status != 0)
5204 goto out;
5205 status = data->rpc_status;
e144cbcc
TM		 5206 if (status == 0)
5207 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5208 else
5209 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5210out:
e6b3c4db 5211 rpc_put_task(task);
fe650407 5212 return status;
1da177e4
LT		 5213}
5214
e6f81075 5215int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5216{
5217 struct nfs_server *server = NFS_SERVER(inode);
5218 struct nfs4_exception exception = { };
5219 int err;
5220 do {
e6f81075 5221 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5222 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5223 switch (err) {
5224 case -NFS4ERR_STALE_STATEID:
5225 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5226 case 0:
5227 return 0;
5228 }
5229 err = nfs4_handle_exception(server, err, &exception);
5230 } while (exception.retry);
5231 return err;
5232}
5233
5234#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5235#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5236
5237/*
5238 * sleep, with exponential backoff, and retry the LOCK operation.
5239 */
5240static unsigned long
5241nfs4_set_lock_task_retry(unsigned long timeout)
5242{
416ad3c9 5243 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5244 timeout <<= 1;
5245 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5246 return NFS4_LOCK_MAXTIMEOUT;
5247 return timeout;
5248}
5249
1da177e4
LT		 5250static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5251{
5252 struct inode *inode = state->inode;
5253 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5254 struct nfs_client *clp = server->nfs_client;
911d1aaf 5255 struct nfs_lockt_args arg = {
1da177e4 5256 .fh = NFS_FH(inode),
911d1aaf 5257 .fl = request,
1da177e4 5258 };
911d1aaf
TM		 5259 struct nfs_lockt_res res = {
5260 .denied = request,
1da177e4
LT		 5261 };
5262 struct rpc_message msg = {
5263 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5264 .rpc_argp = &arg,
5265 .rpc_resp = &res,
5266 .rpc_cred = state->owner->so_cred,
5267 };
1da177e4
LT		 5268 struct nfs4_lock_state *lsp;
5269 int status;
5270
911d1aaf 5271 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5272 status = nfs4_set_lock_state(state, request);
5273 if (status != 0)
5274 goto out;
5275 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5276 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5277 arg.lock_owner.s_dev = server->s_dev;
7c513058 5278 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5279 switch (status) {
5280 case 0:
5281 request->fl_type = F_UNLCK;
5282 break;
5283 case -NFS4ERR_DENIED:
5284 status = 0;
1da177e4 5285 }
70cc6487 5286 request->fl_ops->fl_release_private(request);
a6f951dd 5287 request->fl_ops = NULL;
8d0a8a9d 5288out:
1da177e4
LT		 5289 return status;
5290}
5291
5292static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5293{
5294 struct nfs4_exception exception = { };
5295 int err;
5296
5297 do {
d1b748a5
TM		 5298 err = _nfs4_proc_getlk(state, cmd, request);
5299 trace_nfs4_get_lock(request, state, cmd, err);
5300 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5301 &exception);
5302 } while (exception.retry);
5303 return err;
5304}
5305
5306static int do_vfs_lock(struct file *file, struct file_lock *fl)
5307{
5308 int res = 0;
5309 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5310 case FL_POSIX:
5311 res = posix_lock_file_wait(file, fl);
5312 break;
5313 case FL_FLOCK:
5314 res = flock_lock_file_wait(file, fl);
5315 break;
5316 default:
5317 BUG();
5318 }
1da177e4
LT		 5319 return res;
5320}
5321
faf5f49c 5322struct nfs4_unlockdata {
911d1aaf
TM		 5323 struct nfs_locku_args arg;
5324 struct nfs_locku_res res;
faf5f49c
TM		 5325 struct nfs4_lock_state *lsp;
5326 struct nfs_open_context *ctx;
911d1aaf
TM		 5327 struct file_lock fl;
5328 const struct nfs_server *server;
26e976a8 5329 unsigned long timestamp;
faf5f49c
TM		 5330};
5331
911d1aaf
TM		 5332static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5333 struct nfs_open_context *ctx,
5334 struct nfs4_lock_state *lsp,
5335 struct nfs_seqid *seqid)
5336{
5337 struct nfs4_unlockdata *p;
5338 struct inode *inode = lsp->ls_state->inode;
5339
8535b2be 5340 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5341 if (p == NULL)
5342 return NULL;
5343 p->arg.fh = NFS_FH(inode);
5344 p->arg.fl = &p->fl;
5345 p->arg.seqid = seqid;
c1d51931 5346 p->res.seqid = seqid;
911d1aaf
TM		 5347 p->arg.stateid = &lsp->ls_stateid;
5348 p->lsp = lsp;
5349 atomic_inc(&lsp->ls_count);
5350 /* Ensure we don't close file until we're done freeing locks! */
5351 p->ctx = get_nfs_open_context(ctx);
5352 memcpy(&p->fl, fl, sizeof(p->fl));
5353 p->server = NFS_SERVER(inode);
5354 return p;
5355}
5356
06f814a3 5357static void nfs4_locku_release_calldata(void *data)
faf5f49c 5358{
963d8fe5 5359 struct nfs4_unlockdata *calldata = data;
911d1aaf 5360 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5361 nfs4_put_lock_state(calldata->lsp);
5362 put_nfs_open_context(calldata->ctx);
5363 kfree(calldata);
faf5f49c
TM		 5364}
5365
963d8fe5 5366static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5367{
963d8fe5 5368 struct nfs4_unlockdata *calldata = data;
faf5f49c 5369
14516c3a
TM		 5370 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5371 return;
faf5f49c
TM		 5372 switch (task->tk_status) {
5373 case 0:
f597c537
TM		 5374 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5375 &calldata->res.stateid);
26e976a8 5376 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5377 break;
9e33bed5
TM		 5378 case -NFS4ERR_BAD_STATEID:
5379 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5380 case -NFS4ERR_STALE_STATEID:
5381 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5382 break;
5383 default:
8478eaa1
N		 5384 if (nfs4_async_handle_error(task, calldata->server,
5385 NULL, NULL) == -EAGAIN)
d00c5d43 5386 rpc_restart_call_prepare(task);
faf5f49c 5387 }
2b1bc308 5388 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5389}
5390
4ce70ada 5391static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5392{
4ce70ada 5393 struct nfs4_unlockdata *calldata = data;
faf5f49c 5394
911d1aaf 5395 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5396 goto out_wait;
795a88c9 5397 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5398 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5399 goto out_no_action;
faf5f49c 5400 }
26e976a8 5401 calldata->timestamp = jiffies;
035168ab 5402 if (nfs4_setup_sequence(calldata->server,
a893693c 5403 &calldata->arg.seq_args,
2240a9e2
TM		 5404 &calldata->res.seq_res,
5405 task) != 0)
5406 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5407 return;
5408out_no_action:
5409 task->tk_action = NULL;
5410out_wait:
5411 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5412}
5413
963d8fe5 5414static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5415 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5416 .rpc_call_done = nfs4_locku_done,
06f814a3 5417 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5418};
5419
a5d16a4d
TM		 5420static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5421 struct nfs_open_context *ctx,
5422 struct nfs4_lock_state *lsp,
5423 struct nfs_seqid *seqid)
5424{
5425 struct nfs4_unlockdata *data;
5138fde0
TM		 5426 struct rpc_message msg = {
5427 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5428 .rpc_cred = ctx->cred,
5429 };
c970aa85
TM		 5430 struct rpc_task_setup task_setup_data = {
5431 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5432 .rpc_message = &msg,
c970aa85 5433 .callback_ops = &nfs4_locku_ops,
101070ca 5434 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5435 .flags = RPC_TASK_ASYNC,
5436 };
a5d16a4d 5437
fa940720
WAA		 5438 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5439 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5440
137d6aca
FF		 5441 /* Ensure this is an unlock - when canceling a lock, the
5442 * canceled lock is passed in, and it won't be an unlock.
5443 */
5444 fl->fl_type = F_UNLCK;
5445
a5d16a4d
TM		 5446 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5447 if (data == NULL) {
5448 nfs_free_seqid(seqid);
5449 return ERR_PTR(-ENOMEM);
5450 }
5451
a9c92d6b 5452 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5453 msg.rpc_argp = &data->arg;
5454 msg.rpc_resp = &data->res;
c970aa85
TM		 5455 task_setup_data.callback_data = data;
5456 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5457}
5458
faf5f49c
TM		 5459static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5460{
65b62a29
TM		 5461 struct inode *inode = state->inode;
5462 struct nfs4_state_owner *sp = state->owner;
5463 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5464 struct nfs_seqid *seqid;
1da177e4 5465 struct nfs4_lock_state *lsp;
06f814a3
TM		 5466 struct rpc_task *task;
5467 int status = 0;
536ff0f8 5468 unsigned char fl_flags = request->fl_flags;
faf5f49c 5469
8d0a8a9d 5470 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5471 /* Unlock _before_ we do the RPC call */
5472 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5473 /* Exclude nfs_delegation_claim_locks() */
5474 mutex_lock(&sp->so_delegreturn_mutex);
5475 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5476 down_read(&nfsi->rwsem);
5477 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5478 up_read(&nfsi->rwsem);
65b62a29 5479 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5480 goto out;
19e03c57
TM		 5481 }
5482 up_read(&nfsi->rwsem);
65b62a29 5483 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5484 if (status != 0)
9b073574
TM		 5485 goto out;
5486 /* Is this a delegated lock? */
8d0a8a9d 5487 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5488 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5489 goto out;
8535b2be 5490 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5491 status = -ENOMEM;
911d1aaf 5492 if (seqid == NULL)
9b073574 5493 goto out;
cd3758e3 5494 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5495 status = PTR_ERR(task);
5496 if (IS_ERR(task))
9b073574 5497 goto out;
a5d16a4d 5498 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5499 rpc_put_task(task);
9b073574 5500out:
536ff0f8 5501 request->fl_flags = fl_flags;
d1b748a5 5502 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5503 return status;
5504}
5505
a5d16a4d
TM		 5506struct nfs4_lockdata {
5507 struct nfs_lock_args arg;
5508 struct nfs_lock_res res;
5509 struct nfs4_lock_state *lsp;
5510 struct nfs_open_context *ctx;
5511 struct file_lock fl;
26e976a8 5512 unsigned long timestamp;
a5d16a4d
TM		 5513 int rpc_status;
5514 int cancelled;
66179efe 5515 struct nfs_server *server;
a5d16a4d
TM		 5516};
5517
5518static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5519 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5520 gfp_t gfp_mask)
1da177e4 5521{
a5d16a4d
TM		 5522 struct nfs4_lockdata *p;
5523 struct inode *inode = lsp->ls_state->inode;
1da177e4 5524 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5525
8535b2be 5526 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5527 if (p == NULL)
5528 return NULL;
5529
5530 p->arg.fh = NFS_FH(inode);
5531 p->arg.fl = &p->fl;
8535b2be 5532 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5533 if (p->arg.open_seqid == NULL)
5534 goto out_free;
8535b2be 5535 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5536 if (p->arg.lock_seqid == NULL)
2f74c0a0 5537 goto out_free_seqid;
a5d16a4d 5538 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5539 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5540 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5541 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5542 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5543 p->lsp = lsp;
66179efe 5544 p->server = server;
a5d16a4d
TM		 5545 atomic_inc(&lsp->ls_count);
5546 p->ctx = get_nfs_open_context(ctx);
5547 memcpy(&p->fl, fl, sizeof(p->fl));
5548 return p;
2f74c0a0
TM		 5549out_free_seqid:
5550 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5551out_free:
5552 kfree(p);
5553 return NULL;
5554}
5555
5556static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5557{
5558 struct nfs4_lockdata *data = calldata;
5559 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5560
3110ff80 5561 dprintk("%s: begin!\n", __func__);
2f74c0a0 5562 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5563 goto out_wait;
a5d16a4d
TM		 5564 /* Do we need to do an open_to_lock_owner? */
5565 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5566 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5567 goto out_release_lock_seqid;
8fe72bac 5568 }
8e472f33 5569 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5570 data->arg.new_lock_owner = 1;
c1d51931 5571 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5572 } else
5573 data->arg.new_lock_owner = 0;
5d422301
TM		 5574 if (!nfs4_valid_open_stateid(state)) {
5575 data->rpc_status = -EBADF;
5576 task->tk_action = NULL;
5577 goto out_release_open_seqid;
5578 }
26e976a8 5579 data->timestamp = jiffies;
035168ab
TM		 5580 if (nfs4_setup_sequence(data->server,
5581 &data->arg.seq_args,
2240a9e2 5582 &data->res.seq_res,
d9afbd1b 5583 task) == 0)
66179efe 5584 return;
5d422301 5585out_release_open_seqid:
2240a9e2
TM		 5586 nfs_release_seqid(data->arg.open_seqid);
5587out_release_lock_seqid:
5588 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5589out_wait:
5590 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5591 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5592}
5593
a5d16a4d
TM		 5594static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5595{
5596 struct nfs4_lockdata *data = calldata;
5597
3110ff80 5598 dprintk("%s: begin!\n", __func__);
a5d16a4d 5599
14516c3a
TM		 5600 if (!nfs4_sequence_done(task, &data->res.seq_res))
5601 return;
66179efe 5602
a5d16a4d 5603 data->rpc_status = task->tk_status;
a5d16a4d 5604 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5605 if (data->rpc_status == 0)
5606 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5607 else
5608 goto out;
5609 }
5610 if (data->rpc_status == 0) {
f597c537 5611 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5612 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5613 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5614 }
a5d16a4d 5615out:
3110ff80 5616 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5617}
5618
5619static void nfs4_lock_release(void *calldata)
5620{
5621 struct nfs4_lockdata *data = calldata;
5622
3110ff80 5623 dprintk("%s: begin!\n", __func__);
2f74c0a0 5624 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5625 if (data->cancelled != 0) {
5626 struct rpc_task *task;
5627 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5628 data->arg.lock_seqid);
5629 if (!IS_ERR(task))
bf294b41 5630 rpc_put_task_async(task);
3110ff80 5631 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5632 } else
5633 nfs_free_seqid(data->arg.lock_seqid);
5634 nfs4_put_lock_state(data->lsp);
5635 put_nfs_open_context(data->ctx);
5636 kfree(data);
3110ff80 5637 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5638}
5639
5640static const struct rpc_call_ops nfs4_lock_ops = {
5641 .rpc_call_prepare = nfs4_lock_prepare,
5642 .rpc_call_done = nfs4_lock_done,
5643 .rpc_release = nfs4_lock_release,
5644};
5645
2bee72a6
TM		 5646static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5647{
2bee72a6
TM		 5648 switch (error) {
5649 case -NFS4ERR_ADMIN_REVOKED:
5650 case -NFS4ERR_BAD_STATEID:
ecac799a 5651 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5652 if (new_lock_owner != 0 ||
795a88c9 5653 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5654 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5655 break;
5656 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5657 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5658 case -NFS4ERR_EXPIRED:
5659 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5660 };
5661}
5662
afe6c27c 5663static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5664{
5665 struct nfs4_lockdata *data;
5666 struct rpc_task *task;
5138fde0
TM		 5667 struct rpc_message msg = {
5668 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5669 .rpc_cred = state->owner->so_cred,
5670 };
c970aa85
TM		 5671 struct rpc_task_setup task_setup_data = {
5672 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5673 .rpc_message = &msg,
c970aa85 5674 .callback_ops = &nfs4_lock_ops,
101070ca 5675 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5676 .flags = RPC_TASK_ASYNC,
5677 };
a5d16a4d
TM		 5678 int ret;
5679
3110ff80 5680 dprintk("%s: begin!\n", __func__);
cd3758e3 5681 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5682 fl->fl_u.nfs4_fl.owner,
5683 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5684 if (data == NULL)
5685 return -ENOMEM;
5686 if (IS_SETLKW(cmd))
5687 data->arg.block = 1;
a9c92d6b 5688 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5689 msg.rpc_argp = &data->arg;
5690 msg.rpc_resp = &data->res;
c970aa85 5691 task_setup_data.callback_data = data;
8fe72bac
TM		 5692 if (recovery_type > NFS_LOCK_NEW) {
5693 if (recovery_type == NFS_LOCK_RECLAIM)
5694 data->arg.reclaim = NFS_LOCK_RECLAIM;
5695 nfs4_set_sequence_privileged(&data->arg.seq_args);
5696 }
c970aa85 5697 task = rpc_run_task(&task_setup_data);
7a1218a2 5698 if (IS_ERR(task))
a5d16a4d 5699 return PTR_ERR(task);
a5d16a4d
TM		 5700 ret = nfs4_wait_for_completion_rpc_task(task);
5701 if (ret == 0) {
5702 ret = data->rpc_status;
2bee72a6
TM		 5703 if (ret)
5704 nfs4_handle_setlk_error(data->server, data->lsp,
5705 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5706 } else
5707 data->cancelled = 1;
e6b3c4db 5708 rpc_put_task(task);
3110ff80 5709 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5710 return ret;
1da177e4
LT		 5711}
5712
5713static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5714{
202b50dc 5715 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5716 struct nfs4_exception exception = {
5717 .inode = state->inode,
5718 };
202b50dc
TM		 5719 int err;
5720
5721 do {
42a2d13e
TM		 5722 /* Cache the lock if possible... */
5723 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5724 return 0;
afe6c27c 5725 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5726 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5727 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5728 break;
5729 nfs4_handle_exception(server, err, &exception);
5730 } while (exception.retry);
5731 return err;
1da177e4
LT		 5732}
5733
5734static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5735{
202b50dc 5736 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5737 struct nfs4_exception exception = {
5738 .inode = state->inode,
5739 };
202b50dc
TM		 5740 int err;
5741
6bfc93ef
TM		 5742 err = nfs4_set_lock_state(state, request);
5743 if (err != 0)
5744 return err;
f6de7a39 5745 if (!recover_lost_locks) {
ef1820f9
N		 5746 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5747 return 0;
5748 }
202b50dc 5749 do {
42a2d13e
TM		 5750 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5751 return 0;
afe6c27c 5752 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5753 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5754 switch (err) {
5755 default:
5756 goto out;
5757 case -NFS4ERR_GRACE:
5758 case -NFS4ERR_DELAY:
5759 nfs4_handle_exception(server, err, &exception);
5760 err = 0;
5761 }
202b50dc 5762 } while (exception.retry);
a9ed2e25 5763out:
202b50dc 5764 return err;
1da177e4
LT		 5765}
5766
f062eb6c 5767#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5768/**
5769 * nfs41_check_expired_locks - possibly free a lock stateid
5770 *
5771 * @state: NFSv4 state for an inode
5772 *
5773 * Returns NFS_OK if recovery for this stateid is now finished.
5774 * Otherwise a negative NFS4ERR value is returned.
5775 */
b01dd1d8 5776static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5777{
eb64cf96 5778 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5779 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5780 struct nfs_server *server = NFS_SERVER(state->inode);
5781
b01dd1d8 5782 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5783 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5784 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5785
5786 status = nfs41_test_stateid(server,
5787 &lsp->ls_stateid,
5788 cred);
08cb47fa 5789 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5790 if (status != NFS_OK) {
3e60ffdd
CL		 5791 /* Free the stateid unless the server
5792 * informs us the stateid is unrecognized. */
89af2739
CL		 5793 if (status != -NFS4ERR_BAD_STATEID)
5794 nfs41_free_stateid(server,
ab7cb0df
TM		 5795 &lsp->ls_stateid,
5796 cred);
795a88c9 5797 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5798 ret = status;
5799 }
5800 }
5801 };
5802
5803 return ret;
5804}
5805
5806static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5807{
5808 int status = NFS_OK;
5809
5810 if (test_bit(LK_STATE_IN_USE, &state->flags))
5811 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5812 if (status != NFS_OK)
5813 status = nfs4_lock_expired(state, request);
5814 return status;
f062eb6c
BS		 5815}
5816#endif
5817
1da177e4
LT		 5818static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5819{
9a99af49 5820 struct nfs4_state_owner *sp = state->owner;
19e03c57 5821 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5822 unsigned char fl_flags = request->fl_flags;
9a99af49 5823 unsigned int seq;
8e469ebd 5824 int status = -ENOLCK;
1da177e4 5825
8e469ebd
TM		 5826 if ((fl_flags & FL_POSIX) &&
5827 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5828 goto out;
6bfc93ef 5829 /* Is this a delegated open? */
6bfc93ef
TM		 5830 status = nfs4_set_lock_state(state, request);
5831 if (status != 0)
5832 goto out;
01c3b861
TM		 5833 request->fl_flags |= FL_ACCESS;
5834 status = do_vfs_lock(request->fl_file, request);
5835 if (status < 0)
5836 goto out;
19e03c57 5837 down_read(&nfsi->rwsem);
01c3b861 5838 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5839 /* Yes: cache locks! */
01c3b861 5840 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5841 request->fl_flags = fl_flags & ~FL_SLEEP;
5842 status = do_vfs_lock(request->fl_file, request);
5843 goto out_unlock;
01c3b861 5844 }
9a99af49
TM		 5845 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5846 up_read(&nfsi->rwsem);
afe6c27c 5847 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5848 if (status != 0)
9a99af49
TM		 5849 goto out;
5850 down_read(&nfsi->rwsem);
5851 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5852 status = -NFS4ERR_DELAY;
01c3b861 5853 goto out_unlock;
9a99af49 5854 }
6bfc93ef 5855 /* Note: we always want to sleep here! */
01c3b861 5856 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5857 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5858 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5859 "manager!\n", __func__);
01c3b861 5860out_unlock:
19e03c57 5861 up_read(&nfsi->rwsem);
01c3b861
TM		 5862out:
5863 request->fl_flags = fl_flags;
1da177e4
LT		 5864 return status;
5865}
5866
5867static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5868{
a1d0b5ee
TM		 5869 struct nfs4_exception exception = {
5870 .state = state,
05ffe24f 5871 .inode = state->inode,
a1d0b5ee 5872 };
1da177e4
LT		 5873 int err;
5874
5875 do {
965b5d67 5876 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5877 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5878 if (err == -NFS4ERR_DENIED)
5879 err = -EAGAIN;
1da177e4 5880 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5881 err, &exception);
1da177e4
LT		 5882 } while (exception.retry);
5883 return err;
5884}
5885
5886static int
5887nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5888{
5889 struct nfs_open_context *ctx;
5890 struct nfs4_state *state;
5891 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5892 int status;
5893
5894 /* verify open state */
cd3758e3 5895 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5896 state = ctx->state;
5897
5898 if (request->fl_start < 0 || request->fl_end < 0)
5899 return -EINVAL;
5900
d953126a
TM		 5901 if (IS_GETLK(cmd)) {
5902 if (state != NULL)
5903 return nfs4_proc_getlk(state, F_GETLK, request);
5904 return 0;
5905 }
1da177e4
LT		 5906
5907 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5908 return -EINVAL;
5909
d953126a
TM		 5910 if (request->fl_type == F_UNLCK) {
5911 if (state != NULL)
5912 return nfs4_proc_unlck(state, cmd, request);
5913 return 0;
5914 }
1da177e4 5915
d953126a
TM		 5916 if (state == NULL)
5917 return -ENOLCK;
55725513
TM		 5918 /*
5919 * Don't rely on the VFS having checked the file open mode,
5920 * since it won't do this for flock() locks.
5921 */
f44106e2 5922 switch (request->fl_type) {
55725513
TM		 5923 case F_RDLCK:
5924 if (!(filp->f_mode & FMODE_READ))
5925 return -EBADF;
5926 break;
5927 case F_WRLCK:
5928 if (!(filp->f_mode & FMODE_WRITE))
5929 return -EBADF;
5930 }
5931
1da177e4
LT		 5932 do {
5933 status = nfs4_proc_setlk(state, cmd, request);
5934 if ((status != -EAGAIN) || IS_SETLK(cmd))
5935 break;
5936 timeout = nfs4_set_lock_task_retry(timeout);
5937 status = -ERESTARTSYS;
5938 if (signalled())
5939 break;
5940 } while(status < 0);
1da177e4
LT		 5941 return status;
5942}
5943
db4f2e63 5944int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5945{
5946 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5947 int err;
5948
5949 err = nfs4_set_lock_state(state, fl);
5950 if (err != 0)
db4f2e63 5951 return err;
4a706fa0 5952 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5953 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5954}
6b3b5496 5955
cf470c3e
TM		 5956struct nfs_release_lockowner_data {
5957 struct nfs4_lock_state *lsp;
5ae67c4f 5958 struct nfs_server *server;
cf470c3e 5959 struct nfs_release_lockowner_args args;
b7e63a10 5960 struct nfs_release_lockowner_res res;
60ea6812 5961 unsigned long timestamp;
cf470c3e
TM		 5962};
5963
fbd4bfd1
CL		 5964static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5965{
5966 struct nfs_release_lockowner_data *data = calldata;
5b53dc88
KM		 5967 struct nfs_server *server = data->server;
5968 nfs40_setup_sequence(server, &data->args.seq_args,
5969 &data->res.seq_res, task);
5970 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 5971 data->timestamp = jiffies;
fbd4bfd1
CL		 5972}
5973
5974static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5975{
5976 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 5977 struct nfs_server *server = data->server;
5978
b7e63a10 5979 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 5980
5981 switch (task->tk_status) {
5982 case 0:
5983 renew_lease(server, data->timestamp);
5984 break;
5985 case -NFS4ERR_STALE_CLIENTID:
5986 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 5987 nfs4_schedule_lease_recovery(server->nfs_client);
5988 break;
60ea6812
CL		 5989 case -NFS4ERR_LEASE_MOVED:
5990 case -NFS4ERR_DELAY:
8478eaa1
N		 5991 if (nfs4_async_handle_error(task, server,
5992 NULL, NULL) == -EAGAIN)
60ea6812
CL		 5993 rpc_restart_call_prepare(task);
5994 }
fbd4bfd1
CL		 5995}
5996
d3c7b7cc
TM		 5997static void nfs4_release_lockowner_release(void *calldata)
5998{
cf470c3e 5999 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6000 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6001 kfree(calldata);
6002}
6003
17280175 6004static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6005 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6006 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6007 .rpc_release = nfs4_release_lockowner_release,
6008};
6009
f1cdae87
JL		 6010static void
6011nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6012{
cf470c3e 6013 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6014 struct rpc_message msg = {
6015 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6016 };
6017
6018 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6019 return;
fbd4bfd1 6020
cf470c3e
TM		 6021 data = kmalloc(sizeof(*data), GFP_NOFS);
6022 if (!data)
f1cdae87 6023 return;
cf470c3e 6024 data->lsp = lsp;
5ae67c4f 6025 data->server = server;
cf470c3e
TM		 6026 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6027 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6028 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6029
cf470c3e 6030 msg.rpc_argp = &data->args;
b7e63a10
TM		 6031 msg.rpc_resp = &data->res;
6032 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6033 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6034}
6035
aa1870af
BF		 6036#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6037
64c2ce8b
AK		 6038static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6039 const void *buf, size_t buflen,
6040 int flags, int type)
6b3b5496 6041{
64c2ce8b
AK		 6042 if (strcmp(key, "") != 0)
6043 return -EINVAL;
4b580ee3 6044
64c2ce8b 6045 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6046}
6047
64c2ce8b
AK		 6048static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6049 void *buf, size_t buflen, int type)
6b3b5496 6050{
64c2ce8b
AK		 6051 if (strcmp(key, "") != 0)
6052 return -EINVAL;
aa1870af 6053
64c2ce8b 6054 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6055}
6056
64c2ce8b
AK		 6057static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6058 size_t list_len, const char *name,
6059 size_t name_len, int type)
6b3b5496 6060{
64c2ce8b 6061 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6062
096455a2
BF		 6063 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
6064 return 0;
64c2ce8b
AK		 6065
6066 if (list && len <= list_len)
6067 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6068 return len;
6b3b5496
BF		 6069}
6070
c9bccef6
DQ		 6071#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6072static inline int nfs4_server_supports_labels(struct nfs_server *server)
6073{
6074 return server->caps & NFS_CAP_SECURITY_LABEL;
6075}
6076
6077static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6078 const void *buf, size_t buflen,
6079 int flags, int type)
6080{
6081 if (security_ismaclabel(key))
6082 return nfs4_set_security_label(dentry, buf, buflen);
6083
6084 return -EOPNOTSUPP;
6085}
6086
6087static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6088 void *buf, size_t buflen, int type)
6089{
6090 if (security_ismaclabel(key))
6091 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
6092 return -EOPNOTSUPP;
6093}
6094
6095static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6096 size_t list_len, const char *name,
6097 size_t name_len, int type)
6098{
6099 size_t len = 0;
6100
6101 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
6102 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
6103 if (list && len <= list_len)
6104 security_inode_listsecurity(dentry->d_inode, list, len);
6105 }
6106 return len;
6107}
6108
6109static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6110 .prefix = XATTR_SECURITY_PREFIX,
6111 .list = nfs4_xattr_list_nfs4_label,
6112 .get = nfs4_xattr_get_nfs4_label,
6113 .set = nfs4_xattr_set_nfs4_label,
6114};
6115#endif
6116
6117
533eb461
AA		 6118/*
6119 * nfs_fhget will use either the mounted_on_fileid or the fileid
6120 */
69aaaae1
TM		 6121static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6122{
533eb461
AA		 6123 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6124 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6125 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6126 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6127 return;
6128
6129 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6130 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6131 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6132 fattr->nlink = 2;
6133}
6134
f05d147f
BS		 6135static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6136 const struct qstr *name,
6137 struct nfs4_fs_locations *fs_locations,
6138 struct page *page)
683b57b4
TM		 6139{
6140 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6141 u32 bitmask[3] = {
361e624f 6142 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6143 };
6144 struct nfs4_fs_locations_arg args = {
6145 .dir_fh = NFS_FH(dir),
c228fd3a 6146 .name = name,
683b57b4
TM		 6147 .page = page,
6148 .bitmask = bitmask,
6149 };
22958463
BH		 6150 struct nfs4_fs_locations_res res = {
6151 .fs_locations = fs_locations,
6152 };
683b57b4
TM		 6153 struct rpc_message msg = {
6154 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6155 .rpc_argp = &args,
22958463 6156 .rpc_resp = &res,
683b57b4
TM		 6157 };
6158 int status;
6159
3110ff80 6160 dprintk("%s: start\n", __func__);
533eb461
AA		 6161
6162 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6163 * is not supported */
6164 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6165 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6166 else
6167 bitmask[0] |= FATTR4_WORD0_FILEID;
6168
c228fd3a 6169 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6170 fs_locations->server = server;
830b8e33 6171 fs_locations->nlocations = 0;
f05d147f 6172 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6173 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6174 return status;
6175}
6176
f05d147f
BS		 6177int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6178 const struct qstr *name,
6179 struct nfs4_fs_locations *fs_locations,
6180 struct page *page)
db0a9593
BS		 6181{
6182 struct nfs4_exception exception = { };
6183 int err;
6184 do {
078ea3df
TM		 6185 err = _nfs4_proc_fs_locations(client, dir, name,
6186 fs_locations, page);
6187 trace_nfs4_get_fs_locations(dir, name, err);
6188 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6189 &exception);
6190 } while (exception.retry);
6191 return err;
6192}
6193
b03d735b
CL		 6194/*
6195 * This operation also signals the server that this client is
6196 * performing migration recovery. The server can stop returning
6197 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6198 * appended to this compound to identify the client ID which is
6199 * performing recovery.
6200 */
6201static int _nfs40_proc_get_locations(struct inode *inode,
6202 struct nfs4_fs_locations *locations,
6203 struct page *page, struct rpc_cred *cred)
6204{
6205 struct nfs_server *server = NFS_SERVER(inode);
6206 struct rpc_clnt *clnt = server->client;
6207 u32 bitmask[2] = {
6208 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6209 };
6210 struct nfs4_fs_locations_arg args = {
6211 .clientid = server->nfs_client->cl_clientid,
6212 .fh = NFS_FH(inode),
6213 .page = page,
6214 .bitmask = bitmask,
6215 .migration = 1, /* skip LOOKUP */
6216 .renew = 1, /* append RENEW */
6217 };
6218 struct nfs4_fs_locations_res res = {
6219 .fs_locations = locations,
6220 .migration = 1,
6221 .renew = 1,
6222 };
6223 struct rpc_message msg = {
6224 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6225 .rpc_argp = &args,
6226 .rpc_resp = &res,
6227 .rpc_cred = cred,
6228 };
6229 unsigned long now = jiffies;
6230 int status;
6231
6232 nfs_fattr_init(&locations->fattr);
6233 locations->server = server;
6234 locations->nlocations = 0;
6235
6236 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6237 nfs4_set_sequence_privileged(&args.seq_args);
6238 status = nfs4_call_sync_sequence(clnt, server, &msg,
6239 &args.seq_args, &res.seq_res);
6240 if (status)
6241 return status;
6242
6243 renew_lease(server, now);
6244 return 0;
6245}
6246
6247#ifdef CONFIG_NFS_V4_1
6248
6249/*
6250 * This operation also signals the server that this client is
6251 * performing migration recovery. The server can stop asserting
6252 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6253 * performing this operation is identified in the SEQUENCE
6254 * operation in this compound.
6255 *
6256 * When the client supports GETATTR(fs_locations_info), it can
6257 * be plumbed in here.
6258 */
6259static int _nfs41_proc_get_locations(struct inode *inode,
6260 struct nfs4_fs_locations *locations,
6261 struct page *page, struct rpc_cred *cred)
6262{
6263 struct nfs_server *server = NFS_SERVER(inode);
6264 struct rpc_clnt *clnt = server->client;
6265 u32 bitmask[2] = {
6266 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6267 };
6268 struct nfs4_fs_locations_arg args = {
6269 .fh = NFS_FH(inode),
6270 .page = page,
6271 .bitmask = bitmask,
6272 .migration = 1, /* skip LOOKUP */
6273 };
6274 struct nfs4_fs_locations_res res = {
6275 .fs_locations = locations,
6276 .migration = 1,
6277 };
6278 struct rpc_message msg = {
6279 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6280 .rpc_argp = &args,
6281 .rpc_resp = &res,
6282 .rpc_cred = cred,
6283 };
6284 int status;
6285
6286 nfs_fattr_init(&locations->fattr);
6287 locations->server = server;
6288 locations->nlocations = 0;
6289
6290 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6291 nfs4_set_sequence_privileged(&args.seq_args);
6292 status = nfs4_call_sync_sequence(clnt, server, &msg,
6293 &args.seq_args, &res.seq_res);
6294 if (status == NFS4_OK &&
6295 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6296 status = -NFS4ERR_LEASE_MOVED;
6297 return status;
6298}
6299
6300#endif /* CONFIG_NFS_V4_1 */
6301
6302/**
6303 * nfs4_proc_get_locations - discover locations for a migrated FSID
6304 * @inode: inode on FSID that is migrating
6305 * @locations: result of query
6306 * @page: buffer
6307 * @cred: credential to use for this operation
6308 *
6309 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6310 * operation failed, or a negative errno if a local error occurred.
6311 *
6312 * On success, "locations" is filled in, but if the server has
6313 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6314 * asserted.
6315 *
6316 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6317 * from this client that require migration recovery.
6318 */
6319int nfs4_proc_get_locations(struct inode *inode,
6320 struct nfs4_fs_locations *locations,
6321 struct page *page, struct rpc_cred *cred)
6322{
6323 struct nfs_server *server = NFS_SERVER(inode);
6324 struct nfs_client *clp = server->nfs_client;
6325 const struct nfs4_mig_recovery_ops *ops =
6326 clp->cl_mvops->mig_recovery_ops;
6327 struct nfs4_exception exception = { };
6328 int status;
6329
6330 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6331 (unsigned long long)server->fsid.major,
6332 (unsigned long long)server->fsid.minor,
6333 clp->cl_hostname);
6334 nfs_display_fhandle(NFS_FH(inode), __func__);
6335
6336 do {
6337 status = ops->get_locations(inode, locations, page, cred);
6338 if (status != -NFS4ERR_DELAY)
6339 break;
6340 nfs4_handle_exception(server, status, &exception);
6341 } while (exception.retry);
6342 return status;
6343}
6344
44c99933
CL		 6345/*
6346 * This operation also signals the server that this client is
6347 * performing "lease moved" recovery. The server can stop
6348 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6349 * is appended to this compound to identify the client ID which is
6350 * performing recovery.
6351 */
6352static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6353{
6354 struct nfs_server *server = NFS_SERVER(inode);
6355 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6356 struct rpc_clnt *clnt = server->client;
6357 struct nfs4_fsid_present_arg args = {
6358 .fh = NFS_FH(inode),
6359 .clientid = clp->cl_clientid,
6360 .renew = 1, /* append RENEW */
6361 };
6362 struct nfs4_fsid_present_res res = {
6363 .renew = 1,
6364 };
6365 struct rpc_message msg = {
6366 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6367 .rpc_argp = &args,
6368 .rpc_resp = &res,
6369 .rpc_cred = cred,
6370 };
6371 unsigned long now = jiffies;
6372 int status;
6373
6374 res.fh = nfs_alloc_fhandle();
6375 if (res.fh == NULL)
6376 return -ENOMEM;
6377
6378 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6379 nfs4_set_sequence_privileged(&args.seq_args);
6380 status = nfs4_call_sync_sequence(clnt, server, &msg,
6381 &args.seq_args, &res.seq_res);
6382 nfs_free_fhandle(res.fh);
6383 if (status)
6384 return status;
6385
6386 do_renew_lease(clp, now);
6387 return 0;
6388}
6389
6390#ifdef CONFIG_NFS_V4_1
6391
6392/*
6393 * This operation also signals the server that this client is
6394 * performing "lease moved" recovery. The server can stop asserting
6395 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6396 * this operation is identified in the SEQUENCE operation in this
6397 * compound.
6398 */
6399static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6400{
6401 struct nfs_server *server = NFS_SERVER(inode);
6402 struct rpc_clnt *clnt = server->client;
6403 struct nfs4_fsid_present_arg args = {
6404 .fh = NFS_FH(inode),
6405 };
6406 struct nfs4_fsid_present_res res = {
6407 };
6408 struct rpc_message msg = {
6409 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6410 .rpc_argp = &args,
6411 .rpc_resp = &res,
6412 .rpc_cred = cred,
6413 };
6414 int status;
6415
6416 res.fh = nfs_alloc_fhandle();
6417 if (res.fh == NULL)
6418 return -ENOMEM;
6419
6420 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6421 nfs4_set_sequence_privileged(&args.seq_args);
6422 status = nfs4_call_sync_sequence(clnt, server, &msg,
6423 &args.seq_args, &res.seq_res);
6424 nfs_free_fhandle(res.fh);
6425 if (status == NFS4_OK &&
6426 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6427 status = -NFS4ERR_LEASE_MOVED;
6428 return status;
6429}
6430
6431#endif /* CONFIG_NFS_V4_1 */
6432
6433/**
6434 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6435 * @inode: inode on FSID to check
6436 * @cred: credential to use for this operation
6437 *
6438 * Server indicates whether the FSID is present, moved, or not
6439 * recognized. This operation is necessary to clear a LEASE_MOVED
6440 * condition for this client ID.
6441 *
6442 * Returns NFS4_OK if the FSID is present on this server,
6443 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6444 * NFS4ERR code if some error occurred on the server, or a
6445 * negative errno if a local failure occurred.
6446 */
6447int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6448{
6449 struct nfs_server *server = NFS_SERVER(inode);
6450 struct nfs_client *clp = server->nfs_client;
6451 const struct nfs4_mig_recovery_ops *ops =
6452 clp->cl_mvops->mig_recovery_ops;
6453 struct nfs4_exception exception = { };
6454 int status;
6455
6456 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6457 (unsigned long long)server->fsid.major,
6458 (unsigned long long)server->fsid.minor,
6459 clp->cl_hostname);
6460 nfs_display_fhandle(NFS_FH(inode), __func__);
6461
6462 do {
6463 status = ops->fsid_present(inode, cred);
6464 if (status != -NFS4ERR_DELAY)
6465 break;
6466 nfs4_handle_exception(server, status, &exception);
6467 } while (exception.retry);
6468 return status;
6469}
6470
5ec16a85 6471/**
a5250def
WAA		 6472 * If 'use_integrity' is true and the state managment nfs_client
6473 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6474 * and the machine credential as per RFC3530bis and RFC5661 Security
6475 * Considerations sections. Otherwise, just use the user cred with the
6476 * filesystem's rpc_client.
5ec16a85 6477 */
a5250def 6478static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6479{
6480 int status;
6481 struct nfs4_secinfo_arg args = {
6482 .dir_fh = NFS_FH(dir),
6483 .name = name,
6484 };
6485 struct nfs4_secinfo_res res = {
6486 .flavors = flavors,
6487 };
6488 struct rpc_message msg = {
6489 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6490 .rpc_argp = &args,
6491 .rpc_resp = &res,
6492 };
a5250def 6493 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6494 struct rpc_cred *cred = NULL;
a5250def
WAA		 6495
6496 if (use_integrity) {
6497 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6498 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6499 msg.rpc_cred = cred;
a5250def 6500 }
5a5ea0d4
BS		 6501
6502 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6503
6504 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6505 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6506
a5250def
WAA		 6507 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6508 &res.seq_res, 0);
5a5ea0d4 6509 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6510
7cb852df
WAA		 6511 if (cred)
6512 put_rpccred(cred);
a5250def 6513
5a5ea0d4
BS		 6514 return status;
6515}
6516
72de53ec
BS		 6517int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6518 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6519{
6520 struct nfs4_exception exception = { };
6521 int err;
6522 do {
a5250def
WAA		 6523 err = -NFS4ERR_WRONGSEC;
6524
6525 /* try to use integrity protection with machine cred */
6526 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6527 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6528
6529 /*
6530 * if unable to use integrity protection, or SECINFO with
6531 * integrity protection returns NFS4ERR_WRONGSEC (which is
6532 * disallowed by spec, but exists in deployed servers) use
6533 * the current filesystem's rpc_client and the user cred.
6534 */
6535 if (err == -NFS4ERR_WRONGSEC)
6536 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6537
078ea3df
TM		 6538 trace_nfs4_secinfo(dir, name, err);
6539 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6540 &exception);
6541 } while (exception.retry);
6542 return err;
6543}
6544
557134a3 6545#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6546/*
6547 * Check the exchange flags returned by the server for invalid flags, having
6548 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6549 * DS flags set.
6550 */
6551static int nfs4_check_cl_exchange_flags(u32 flags)
6552{
6553 if (flags & ~EXCHGID4_FLAG_MASK_R)
6554 goto out_inval;
6555 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6556 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6557 goto out_inval;
6558 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6559 goto out_inval;
6560 return NFS_OK;
6561out_inval:
6562 return -NFS4ERR_INVAL;
6563}
6564
78fe0f41 6565static bool
79d4e1f0
CL		 6566nfs41_same_server_scope(struct nfs41_server_scope *a,
6567 struct nfs41_server_scope *b)
78fe0f41
WAA		 6568{
6569 if (a->server_scope_sz == b->server_scope_sz &&
6570 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6571 return true;
6572
6573 return false;
6574}
6575
7c44f1ae
WAA		 6576/*
6577 * nfs4_proc_bind_conn_to_session()
6578 *
6579 * The 4.1 client currently uses the same TCP connection for the
6580 * fore and backchannel.
6581 */
2cf047c9 6582int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6583{
6584 int status;
6585 struct nfs41_bind_conn_to_session_res res;
6586 struct rpc_message msg = {
6587 .rpc_proc =
6588 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6589 .rpc_argp = clp,
6590 .rpc_resp = &res,
2cf047c9 6591 .rpc_cred = cred,
7c44f1ae
WAA		 6592 };
6593
6594 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 6595
6596 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6597 if (unlikely(res.session == NULL)) {
6598 status = -ENOMEM;
6599 goto out;
6600 }
6601
6602 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6603 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 6604 if (status == 0) {
6605 if (memcmp(res.session->sess_id.data,
6606 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6607 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6608 status = -EIO;
6609 goto out_session;
6610 }
6611 if (res.dir != NFS4_CDFS4_BOTH) {
6612 dprintk("NFS: %s: Unexpected direction from server\n",
6613 __func__);
6614 status = -EIO;
6615 goto out_session;
6616 }
6617 if (res.use_conn_in_rdma_mode) {
6618 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6619 __func__);
6620 status = -EIO;
6621 goto out_session;
6622 }
6623 }
6624out_session:
6625 kfree(res.session);
6626out:
6627 dprintk("<-- %s status= %d\n", __func__, status);
6628 return status;
6629}
6630
99fe60d0 6631/*
fa940720
WAA		 6632 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6633 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6634 */
6635static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6636 .how = SP4_MACH_CRED,
6637 .enforce.u.words = {
6638 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6639 1 << (OP_EXCHANGE_ID - 32) |
6640 1 << (OP_CREATE_SESSION - 32) |
6641 1 << (OP_DESTROY_SESSION - 32) |
6642 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6643 },
6644 .allow.u.words = {
6645 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6646 1 << (OP_LOCKU) |
6647 1 << (OP_COMMIT),
8b5bee2e 6648 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6649 1 << (OP_SECINFO_NO_NAME - 32) |
6650 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6651 1 << (OP_FREE_STATEID - 32) |
6652 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6653 }
6654};
6655
6656/*
6657 * Select the state protection mode for client `clp' given the server results
6658 * from exchange_id in `sp'.
99fe60d0 6659 *
2031cd1a
WAA		 6660 * Returns 0 on success, negative errno otherwise.
6661 */
6662static int nfs4_sp4_select_mode(struct nfs_client *clp,
6663 struct nfs41_state_protection *sp)
6664{
6665 static const u32 supported_enforce[NFS4_OP_MAP_NUM_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)
6671 };
6672 unsigned int i;
6673
6674 if (sp->how == SP4_MACH_CRED) {
6675 /* Print state protect result */
6676 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6677 for (i = 0; i <= LAST_NFS4_OP; i++) {
6678 if (test_bit(i, sp->enforce.u.longs))
6679 dfprintk(MOUNT, " enforce op %d\n", i);
6680 if (test_bit(i, sp->allow.u.longs))
6681 dfprintk(MOUNT, " allow op %d\n", i);
6682 }
6683
6684 /* make sure nothing is on enforce list that isn't supported */
6685 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6686 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6687 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6688 return -EINVAL;
6689 }
6690 }
6691
6692 /*
6693 * Minimal mode - state operations are allowed to use machine
6694 * credential. Note this already happens by default, so the
6695 * client doesn't have to do anything more than the negotiation.
6696 *
6697 * NOTE: we don't care if EXCHANGE_ID is in the list -
6698 * we're already using the machine cred for exchange_id
6699 * and will never use a different cred.
6700 */
6701 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6702 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6703 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6704 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6705 dfprintk(MOUNT, "sp4_mach_cred:\n");
6706 dfprintk(MOUNT, " minimal mode enabled\n");
6707 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6708 } else {
6709 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6710 return -EINVAL;
6711 }
fa940720
WAA		 6712
6713 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6714 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6715 dfprintk(MOUNT, " cleanup mode enabled\n");
6716 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6717 }
8b5bee2e
WAA		 6718
6719 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6720 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6721 dfprintk(MOUNT, " secinfo mode enabled\n");
6722 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6723 }
3787d506
WAA		 6724
6725 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6726 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6727 dfprintk(MOUNT, " stateid mode enabled\n");
6728 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6729 }
8c21c62c
WAA		 6730
6731 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6732 dfprintk(MOUNT, " write mode enabled\n");
6733 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6734 }
6735
6736 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6737 dfprintk(MOUNT, " commit mode enabled\n");
6738 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6739 }
2031cd1a
WAA		 6740 }
6741
6742 return 0;
6743}
6744
6745/*
6746 * _nfs4_proc_exchange_id()
6bbb4ae8 6747 *
2031cd1a 6748 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6749 */
2031cd1a
WAA		 6750static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6751 u32 sp4_how)
99fe60d0
BH		 6752{
6753 nfs4_verifier verifier;
6754 struct nfs41_exchange_id_args args = {
cd93710e 6755 .verifier = &verifier,
99fe60d0 6756 .client = clp,
cd3fadec 6757#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6758 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6759 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6760 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6761#else
6762 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6763 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6764#endif
99fe60d0
BH		 6765 };
6766 struct nfs41_exchange_id_res res = {
32b01310 6767 0
99fe60d0
BH		 6768 };
6769 int status;
6770 struct rpc_message msg = {
6771 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6772 .rpc_argp = &args,
6773 .rpc_resp = &res,
6774 .rpc_cred = cred,
6775 };
99fe60d0 6776
f092075d 6777 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6778 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6779 sizeof(args.id));
6bbb4ae8
CL		 6780 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6781 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6782 args.id_len, args.id);
99fe60d0 6783
acdeb69d 6784 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6785 GFP_NOFS);
acdeb69d 6786 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6787 status = -ENOMEM;
6788 goto out;
6789 }
78fe0f41 6790
79d4e1f0 6791 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6792 GFP_NOFS);
177313f1 6793 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6794 status = -ENOMEM;
acdeb69d 6795 goto out_server_owner;
abe9a6d5 6796 }
78fe0f41 6797
bbafffd2 6798 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6799 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6800 status = -ENOMEM;
6801 goto out_server_scope;
6802 }
6803
2031cd1a
WAA		 6804 switch (sp4_how) {
6805 case SP4_NONE:
6806 args.state_protect.how = SP4_NONE;
6807 break;
6808
6809 case SP4_MACH_CRED:
6810 args.state_protect = nfs4_sp4_mach_cred_request;
6811 break;
6812
6813 default:
6814 /* unsupported! */
6815 WARN_ON_ONCE(1);
6816 status = -EINVAL;
6817 goto out_server_scope;
6818 }
6819
1bd714f2 6820 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6821 trace_nfs4_exchange_id(clp, status);
177313f1 6822 if (status == 0)
32b01310 6823 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6824
2031cd1a
WAA		 6825 if (status == 0)
6826 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6827
acdeb69d 6828 if (status == 0) {
32b01310
TM		 6829 clp->cl_clientid = res.clientid;
6830 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6831 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6832 clp->cl_seqid = res.seqid;
6833
acdeb69d
CL		 6834 kfree(clp->cl_serverowner);
6835 clp->cl_serverowner = res.server_owner;
6836 res.server_owner = NULL;
78fe0f41 6837
7d2ed9ac 6838 /* use the most recent implementation id */
59155546
CL		 6839 kfree(clp->cl_implid);
6840 clp->cl_implid = res.impl_id;
7d2ed9ac 6841
177313f1 6842 if (clp->cl_serverscope != NULL &&
79d4e1f0 6843 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6844 res.server_scope)) {
6845 dprintk("%s: server_scope mismatch detected\n",
6846 __func__);
6847 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6848 kfree(clp->cl_serverscope);
6849 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6850 }
6851
177313f1 6852 if (clp->cl_serverscope == NULL) {
79d4e1f0 6853 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6854 goto out;
6855 }
32b01310
TM		 6856 } else
6857 kfree(res.impl_id);
7d2ed9ac 6858
acdeb69d
CL		 6859out_server_owner:
6860 kfree(res.server_owner);
7d2ed9ac 6861out_server_scope:
abe9a6d5
WAA		 6862 kfree(res.server_scope);
6863out:
177313f1 6864 if (clp->cl_implid != NULL)
6bbb4ae8 6865 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6866 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6867 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6868 clp->cl_implid->date.seconds,
6869 clp->cl_implid->date.nseconds);
6bbb4ae8 6870 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6871 return status;
6872}
6873
2031cd1a
WAA		 6874/*
6875 * nfs4_proc_exchange_id()
6876 *
6877 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6878 *
6879 * Since the clientid has expired, all compounds using sessions
6880 * associated with the stale clientid will be returning
6881 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6882 * be in some phase of session reset.
6883 *
6884 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6885 */
6886int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6887{
6888 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6889 int status;
6890
6891 /* try SP4_MACH_CRED if krb5i/p */
6892 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6893 authflavor == RPC_AUTH_GSS_KRB5P) {
6894 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6895 if (!status)
6896 return 0;
6897 }
6898
6899 /* try SP4_NONE */
6900 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6901}
6902
66245539
TM		 6903static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6904 struct rpc_cred *cred)
6905{
6906 struct rpc_message msg = {
6907 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6908 .rpc_argp = clp,
6909 .rpc_cred = cred,
6910 };
6911 int status;
6912
6913 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6914 trace_nfs4_destroy_clientid(clp, status);
66245539 6915 if (status)
02c67525 6916 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6917 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6918 return status;
6919}
6920
6921static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6922 struct rpc_cred *cred)
6923{
6924 unsigned int loop;
6925 int ret;
6926
6927 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6928 ret = _nfs4_proc_destroy_clientid(clp, cred);
6929 switch (ret) {
6930 case -NFS4ERR_DELAY:
6931 case -NFS4ERR_CLIENTID_BUSY:
6932 ssleep(1);
6933 break;
6934 default:
6935 return ret;
6936 }
6937 }
6938 return 0;
6939}
6940
6941int nfs4_destroy_clientid(struct nfs_client *clp)
6942{
6943 struct rpc_cred *cred;
6944 int ret = 0;
6945
6946 if (clp->cl_mvops->minor_version < 1)
6947 goto out;
6948 if (clp->cl_exchange_flags == 0)
6949 goto out;
05f4c350
CL		 6950 if (clp->cl_preserve_clid)
6951 goto out;
73d8bde5 6952 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6953 ret = nfs4_proc_destroy_clientid(clp, cred);
6954 if (cred)
6955 put_rpccred(cred);
6956 switch (ret) {
6957 case 0:
6958 case -NFS4ERR_STALE_CLIENTID:
6959 clp->cl_exchange_flags = 0;
6960 }
6961out:
6962 return ret;
6963}
6964
2050f0cc
AA		 6965struct nfs4_get_lease_time_data {
6966 struct nfs4_get_lease_time_args *args;
6967 struct nfs4_get_lease_time_res *res;
6968 struct nfs_client *clp;
6969};
6970
6971static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6972 void *calldata)
6973{
2050f0cc
AA		 6974 struct nfs4_get_lease_time_data *data =
6975 (struct nfs4_get_lease_time_data *)calldata;
6976
6977 dprintk("--> %s\n", __func__);
6978 /* just setup sequence, do not trigger session recovery
6979 since we're invoked within one */
d9afbd1b
TM		 6980 nfs41_setup_sequence(data->clp->cl_session,
6981 &data->args->la_seq_args,
6982 &data->res->lr_seq_res,
6983 task);
2050f0cc
AA		 6984 dprintk("<-- %s\n", __func__);
6985}
6986
6987/*
6988 * Called from nfs4_state_manager thread for session setup, so don't recover
6989 * from sequence operation or clientid errors.
6990 */
6991static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6992{
6993 struct nfs4_get_lease_time_data *data =
6994 (struct nfs4_get_lease_time_data *)calldata;
6995
6996 dprintk("--> %s\n", __func__);
14516c3a
TM		 6997 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6998 return;
2050f0cc
AA		 6999 switch (task->tk_status) {
7000 case -NFS4ERR_DELAY:
7001 case -NFS4ERR_GRACE:
7002 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7003 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7004 task->tk_status = 0;
a8a4ae3a
AA		 7005 /* fall through */
7006 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7007 rpc_restart_call_prepare(task);
2050f0cc
AA		 7008 return;
7009 }
2050f0cc
AA		 7010 dprintk("<-- %s\n", __func__);
7011}
7012
17280175 7013static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7014 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7015 .rpc_call_done = nfs4_get_lease_time_done,
7016};
7017
7018int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7019{
7020 struct rpc_task *task;
7021 struct nfs4_get_lease_time_args args;
7022 struct nfs4_get_lease_time_res res = {
7023 .lr_fsinfo = fsinfo,
7024 };
7025 struct nfs4_get_lease_time_data data = {
7026 .args = &args,
7027 .res = &res,
7028 .clp = clp,
7029 };
7030 struct rpc_message msg = {
7031 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7032 .rpc_argp = &args,
7033 .rpc_resp = &res,
7034 };
7035 struct rpc_task_setup task_setup = {
7036 .rpc_client = clp->cl_rpcclient,
7037 .rpc_message = &msg,
7038 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7039 .callback_data = &data,
7040 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7041 };
7042 int status;
7043
a9c92d6b 7044 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7045 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7046 dprintk("--> %s\n", __func__);
7047 task = rpc_run_task(&task_setup);
7048
7049 if (IS_ERR(task))
7050 status = PTR_ERR(task);
7051 else {
7052 status = task->tk_status;
7053 rpc_put_task(task);
7054 }
7055 dprintk("<-- %s return %d\n", __func__, status);
7056
7057 return status;
7058}
7059
fc931582
AA		 7060/*
7061 * Initialize the values to be used by the client in CREATE_SESSION
7062 * If nfs4_init_session set the fore channel request and response sizes,
7063 * use them.
7064 *
7065 * Set the back channel max_resp_sz_cached to zero to force the client to
7066 * always set csa_cachethis to FALSE because the current implementation
7067 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7068 */
7069static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7070{
18aad3d5
AA		 7071 unsigned int max_rqst_sz, max_resp_sz;
7072
7073 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7074 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7075
fc931582 7076 /* Fore channel attributes */
18aad3d5
AA		 7077 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7078 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7079 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7080 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7081
7082 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7083 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7084 __func__,
7085 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7086 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7087
7088 /* Back channel attributes */
fc931582
AA		 7089 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7090 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7091 args->bc_attrs.max_resp_sz_cached = 0;
7092 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7093 args->bc_attrs.max_reqs = 1;
7094
7095 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7096 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7097 __func__,
7098 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7099 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7100 args->bc_attrs.max_reqs);
7101}
7102
43c2e885 7103static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 7104{
43c2e885
BF		 7105 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7106 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
7107
43c2e885
BF		 7108 if (rcvd->max_resp_sz > sent->max_resp_sz)
7109 return -EINVAL;
7110 /*
7111 * Our requested max_ops is the minimum we need; we're not
7112 * prepared to break up compounds into smaller pieces than that.
7113 * So, no point even trying to continue if the server won't
7114 * cooperate:
7115 */
7116 if (rcvd->max_ops < sent->max_ops)
7117 return -EINVAL;
7118 if (rcvd->max_reqs == 0)
7119 return -EINVAL;
b4b9a0c1
VG		 7120 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7121 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7122 return 0;
8d35301d
AA		 7123}
7124
43c2e885
BF		 7125static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
7126{
7127 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7128 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 7129
43c2e885
BF		 7130 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7131 return -EINVAL;
7132 if (rcvd->max_resp_sz < sent->max_resp_sz)
7133 return -EINVAL;
7134 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7135 return -EINVAL;
7136 /* These would render the backchannel useless: */
b4b9a0c1 7137 if (rcvd->max_ops != sent->max_ops)
43c2e885 7138 return -EINVAL;
b4b9a0c1 7139 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 7140 return -EINVAL;
7141 return 0;
7142}
8d35301d 7143
8d35301d
AA		 7144static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7145 struct nfs4_session *session)
7146{
43c2e885 7147 int ret;
8d35301d 7148
43c2e885
BF		 7149 ret = nfs4_verify_fore_channel_attrs(args, session);
7150 if (ret)
7151 return ret;
7152 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 7153}
7154
848f5bda
TM		 7155static int _nfs4_proc_create_session(struct nfs_client *clp,
7156 struct rpc_cred *cred)
fc931582
AA		 7157{
7158 struct nfs4_session *session = clp->cl_session;
7159 struct nfs41_create_session_args args = {
7160 .client = clp,
7161 .cb_program = NFS4_CALLBACK,
7162 };
7163 struct nfs41_create_session_res res = {
7164 .client = clp,
7165 };
7166 struct rpc_message msg = {
7167 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7168 .rpc_argp = &args,
7169 .rpc_resp = &res,
848f5bda 7170 .rpc_cred = cred,
fc931582
AA		 7171 };
7172 int status;
7173
7174 nfs4_init_channel_attrs(&args);
0f91421e 7175 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7176
1bd714f2 7177 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7178 trace_nfs4_create_session(clp, status);
fc931582 7179
43095d39 7180 if (!status) {
8d35301d
AA		 7181 /* Verify the session's negotiated channel_attrs values */
7182 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 7183 /* Increment the clientid slot sequence id */
7184 clp->cl_seqid++;
7185 }
7186
7187 return status;
7188}
7189
7190/*
7191 * Issues a CREATE_SESSION operation to the server.
7192 * It is the responsibility of the caller to verify the session is
7193 * expired before calling this routine.
7194 */
848f5bda 7195int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7196{
7197 int status;
7198 unsigned *ptr;
fc931582
AA		 7199 struct nfs4_session *session = clp->cl_session;
7200
7201 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7202
848f5bda 7203 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7204 if (status)
7205 goto out;
7206
aacd5537
AA		 7207 /* Init or reset the session slot tables */
7208 status = nfs4_setup_session_slot_tables(session);
7209 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7210 if (status)
7211 goto out;
7212
7213 ptr = (unsigned *)&session->sess_id.data[0];
7214 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7215 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7216out:
7217 dprintk("<-- %s\n", __func__);
7218 return status;
7219}
7220
0f3e66c6
AA		 7221/*
7222 * Issue the over-the-wire RPC DESTROY_SESSION.
7223 * The caller must serialize access to this routine.
7224 */
848f5bda
TM		 7225int nfs4_proc_destroy_session(struct nfs4_session *session,
7226 struct rpc_cred *cred)
0f3e66c6 7227{
848f5bda
TM		 7228 struct rpc_message msg = {
7229 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7230 .rpc_argp = session,
7231 .rpc_cred = cred,
7232 };
0f3e66c6 7233 int status = 0;
0f3e66c6
AA		 7234
7235 dprintk("--> nfs4_proc_destroy_session\n");
7236
7237 /* session is still being setup */
7238 if (session->clp->cl_cons_state != NFS_CS_READY)
7239 return status;
7240
1bd714f2 7241 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7242 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7243
7244 if (status)
08106ac7 7245 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7246 "Session has been destroyed regardless...\n", status);
7247
7248 dprintk("<-- nfs4_proc_destroy_session\n");
7249 return status;
7250}
7251
fc01cea9
AA		 7252/*
7253 * Renew the cl_session lease.
7254 */
d5f8d3fe
TM		 7255struct nfs4_sequence_data {
7256 struct nfs_client *clp;
7257 struct nfs4_sequence_args args;
7258 struct nfs4_sequence_res res;
7259};
7260
dc96aef9
AB		 7261static void nfs41_sequence_release(void *data)
7262{
d5f8d3fe
TM		 7263 struct nfs4_sequence_data *calldata = data;
7264 struct nfs_client *clp = calldata->clp;
dc96aef9 7265
7135840f
AB		 7266 if (atomic_read(&clp->cl_count) > 1)
7267 nfs4_schedule_state_renewal(clp);
7268 nfs_put_client(clp);
d5f8d3fe 7269 kfree(calldata);
dc96aef9
AB		 7270}
7271
aa5190d0
TM		 7272static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7273{
7274 switch(task->tk_status) {
7275 case -NFS4ERR_DELAY:
aa5190d0
TM		 7276 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7277 return -EAGAIN;
7278 default:
0400a6b0 7279 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7280 }
7281 return 0;
7282}
7283
dc96aef9 7284static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7285{
d5f8d3fe
TM		 7286 struct nfs4_sequence_data *calldata = data;
7287 struct nfs_client *clp = calldata->clp;
fc01cea9 7288
14516c3a
TM		 7289 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7290 return;
fc01cea9 7291
c6d01c6f 7292 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7293 if (task->tk_status < 0) {
7294 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7295 if (atomic_read(&clp->cl_count) == 1)
7296 goto out;
fc01cea9 7297
aa5190d0
TM		 7298 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7299 rpc_restart_call_prepare(task);
fc01cea9
AA		 7300 return;
7301 }
7302 }
fc01cea9 7303 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7304out:
fc01cea9
AA		 7305 dprintk("<-- %s\n", __func__);
7306}
7307
7308static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7309{
d5f8d3fe
TM		 7310 struct nfs4_sequence_data *calldata = data;
7311 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7312 struct nfs4_sequence_args *args;
7313 struct nfs4_sequence_res *res;
7314
fc01cea9
AA		 7315 args = task->tk_msg.rpc_argp;
7316 res = task->tk_msg.rpc_resp;
7317
d9afbd1b 7318 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7319}
7320
7321static const struct rpc_call_ops nfs41_sequence_ops = {
7322 .rpc_call_done = nfs41_sequence_call_done,
7323 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7324 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7325};
7326
8fe72bac
TM		 7327static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7328 struct rpc_cred *cred,
7329 bool is_privileged)
fc01cea9 7330{
d5f8d3fe 7331 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7332 struct rpc_message msg = {
7333 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7334 .rpc_cred = cred,
7335 };
71ac6da9
TM		 7336 struct rpc_task_setup task_setup_data = {
7337 .rpc_client = clp->cl_rpcclient,
7338 .rpc_message = &msg,
8fe72bac 7339 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7340 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7341 };
fc01cea9 7342
7135840f 7343 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7344 return ERR_PTR(-EIO);
dfb4f309 7345 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7346 if (calldata == NULL) {
7135840f 7347 nfs_put_client(clp);
71ac6da9 7348 return ERR_PTR(-ENOMEM);
fc01cea9 7349 }
a9c92d6b 7350 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7351 if (is_privileged)
7352 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7353 msg.rpc_argp = &calldata->args;
7354 msg.rpc_resp = &calldata->res;
7355 calldata->clp = clp;
71ac6da9 7356 task_setup_data.callback_data = calldata;
fc01cea9 7357
71ac6da9
TM		 7358 return rpc_run_task(&task_setup_data);
7359}
7360
2f60ea6b 7361static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7362{
7363 struct rpc_task *task;
7364 int ret = 0;
7365
2f60ea6b 7366 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7367 return -EAGAIN;
8fe72bac 7368 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7369 if (IS_ERR(task))
7370 ret = PTR_ERR(task);
7371 else
bf294b41 7372 rpc_put_task_async(task);
71ac6da9
TM		 7373 dprintk("<-- %s status=%d\n", __func__, ret);
7374 return ret;
7375}
7376
7377static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7378{
7379 struct rpc_task *task;
7380 int ret;
7381
8fe72bac 7382 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7383 if (IS_ERR(task)) {
7384 ret = PTR_ERR(task);
7385 goto out;
7386 }
7387 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7388 if (!ret) {
7389 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7390
7391 if (task->tk_status == 0)
7392 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7393 ret = task->tk_status;
b4410c2f 7394 }
71ac6da9
TM		 7395 rpc_put_task(task);
7396out:
7397 dprintk("<-- %s status=%d\n", __func__, ret);
7398 return ret;
fc01cea9
AA		 7399}
7400
fce5c838
RL		 7401struct nfs4_reclaim_complete_data {
7402 struct nfs_client *clp;
7403 struct nfs41_reclaim_complete_args arg;
7404 struct nfs41_reclaim_complete_res res;
7405};
7406
7407static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7408{
7409 struct nfs4_reclaim_complete_data *calldata = data;
7410
d9afbd1b
TM		 7411 nfs41_setup_sequence(calldata->clp->cl_session,
7412 &calldata->arg.seq_args,
7413 &calldata->res.seq_res,
7414 task);
fce5c838
RL		 7415}
7416
aa5190d0
TM		 7417static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7418{
7419 switch(task->tk_status) {
7420 case 0:
7421 case -NFS4ERR_COMPLETE_ALREADY:
7422 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7423 break;
7424 case -NFS4ERR_DELAY:
aa5190d0 7425 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7426 /* fall through */
7427 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7428 return -EAGAIN;
7429 default:
0400a6b0 7430 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7431 }
7432 return 0;
7433}
7434
fce5c838
RL		 7435static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7436{
7437 struct nfs4_reclaim_complete_data *calldata = data;
7438 struct nfs_client *clp = calldata->clp;
7439 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7440
7441 dprintk("--> %s\n", __func__);
14516c3a
TM		 7442 if (!nfs41_sequence_done(task, res))
7443 return;
fce5c838 7444
c6d01c6f 7445 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7446 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7447 rpc_restart_call_prepare(task);
7448 return;
7449 }
fce5c838
RL		 7450 dprintk("<-- %s\n", __func__);
7451}
7452
7453static void nfs4_free_reclaim_complete_data(void *data)
7454{
7455 struct nfs4_reclaim_complete_data *calldata = data;
7456
7457 kfree(calldata);
7458}
7459
7460static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7461 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7462 .rpc_call_done = nfs4_reclaim_complete_done,
7463 .rpc_release = nfs4_free_reclaim_complete_data,
7464};
7465
7466/*
7467 * Issue a global reclaim complete.
7468 */
965e9c23
TM		 7469static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7470 struct rpc_cred *cred)
fce5c838
RL		 7471{
7472 struct nfs4_reclaim_complete_data *calldata;
7473 struct rpc_task *task;
7474 struct rpc_message msg = {
7475 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7476 .rpc_cred = cred,
fce5c838
RL		 7477 };
7478 struct rpc_task_setup task_setup_data = {
7479 .rpc_client = clp->cl_rpcclient,
7480 .rpc_message = &msg,
7481 .callback_ops = &nfs4_reclaim_complete_call_ops,
7482 .flags = RPC_TASK_ASYNC,
7483 };
7484 int status = -ENOMEM;
7485
7486 dprintk("--> %s\n", __func__);
8535b2be 7487 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7488 if (calldata == NULL)
7489 goto out;
7490 calldata->clp = clp;
7491 calldata->arg.one_fs = 0;
fce5c838 7492
a9c92d6b 7493 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7494 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7495 msg.rpc_argp = &calldata->arg;
7496 msg.rpc_resp = &calldata->res;
7497 task_setup_data.callback_data = calldata;
7498 task = rpc_run_task(&task_setup_data);
acf82b85 7499 if (IS_ERR(task)) {
fce5c838 7500 status = PTR_ERR(task);
acf82b85
DC		 7501 goto out;
7502 }
c34c32ea
AA		 7503 status = nfs4_wait_for_completion_rpc_task(task);
7504 if (status == 0)
7505 status = task->tk_status;
fce5c838 7506 rpc_put_task(task);
acf82b85 7507 return 0;
fce5c838
RL		 7508out:
7509 dprintk("<-- %s status=%d\n", __func__, status);
7510 return status;
7511}
b1f69b75
AA		 7512
7513static void
7514nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7515{
7516 struct nfs4_layoutget *lgp = calldata;
c31663d4 7517 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7518 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7519
7520 dprintk("--> %s\n", __func__);
c31663d4
FI		 7521 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7522 * right now covering the LAYOUTGET we are about to send.
7523 * However, that is not so catastrophic, and there seems
7524 * to be no way to prevent it completely.
7525 */
6ba7db34 7526 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7527 &lgp->res.seq_res, task))
b1f69b75 7528 return;
cf7d63f1
FI		 7529 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7530 NFS_I(lgp->args.inode)->layout,
7531 lgp->args.ctx->state)) {
7532 rpc_exit(task, NFS4_OK);
cf7d63f1 7533 }
b1f69b75
AA		 7534}
7535
7536static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7537{
7538 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7539 struct inode *inode = lgp->args.inode;
7540 struct nfs_server *server = NFS_SERVER(inode);
7541 struct pnfs_layout_hdr *lo;
7542 struct nfs4_state *state = NULL;
ed7e5423 7543 unsigned long timeo, now, giveup;
b1f69b75 7544
ed7e5423 7545 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7546
6ba7db34 7547 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7548 goto out;
b1f69b75
AA		 7549
7550 switch (task->tk_status) {
7551 case 0:
ee314c2a 7552 goto out;
ed7e5423
BH		 7553 /*
7554 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7555 * (or clients) writing to the same RAID stripe
7556 */
b1f69b75 7557 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7558 /*
7559 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7560 * existing layout before getting a new one).
7561 */
b1f69b75 7562 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7563 timeo = rpc_get_timeout(task->tk_client);
7564 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7565 now = jiffies;
7566 if (time_after(giveup, now)) {
7567 unsigned long delay;
7568
7569 /* Delay for:
7570 * - Not less then NFS4_POLL_RETRY_MIN.
7571 * - One last time a jiffie before we give up
7572 * - exponential backoff (time_now minus start_attempt)
7573 */
7574 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7575 min((giveup - now - 1),
7576 now - lgp->args.timestamp));
7577
7578 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7579 __func__, delay);
7580 rpc_delay(task, delay);
7581 task->tk_status = 0;
7582 rpc_restart_call_prepare(task);
7583 goto out; /* Do not call nfs4_async_handle_error() */
7584 }
ee314c2a
TM		 7585 break;
7586 case -NFS4ERR_EXPIRED:
7587 case -NFS4ERR_BAD_STATEID:
7588 spin_lock(&inode->i_lock);
7589 lo = NFS_I(inode)->layout;
7590 if (!lo || list_empty(&lo->plh_segs)) {
7591 spin_unlock(&inode->i_lock);
7592 /* If the open stateid was bad, then recover it. */
7593 state = lgp->args.ctx->state;
7594 } else {
7595 LIST_HEAD(head);
7596
defb8460
CH		 7597 /*
7598 * Mark the bad layout state as invalid, then retry
7599 * with the current stateid.
7600 */
ee314c2a
TM		 7601 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7602 spin_unlock(&inode->i_lock);
ee314c2a 7603 pnfs_free_lseg_list(&head);
defb8460
CH		 7604
7605 task->tk_status = 0;
7606 rpc_restart_call_prepare(task);
b1f69b75
AA		 7607 }
7608 }
8478eaa1 7609 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
ee314c2a
TM		 7610 rpc_restart_call_prepare(task);
7611out:
b1f69b75
AA		 7612 dprintk("<-- %s\n", __func__);
7613}
7614
8554116e
IK		 7615static size_t max_response_pages(struct nfs_server *server)
7616{
7617 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7618 return nfs_page_array_len(0, max_resp_sz);
7619}
7620
7621static void nfs4_free_pages(struct page **pages, size_t size)
7622{
7623 int i;
7624
7625 if (!pages)
7626 return;
7627
7628 for (i = 0; i < size; i++) {
7629 if (!pages[i])
7630 break;
7631 __free_page(pages[i]);
7632 }
7633 kfree(pages);
7634}
7635
7636static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7637{
7638 struct page **pages;
7639 int i;
7640
7641 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7642 if (!pages) {
7643 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7644 return NULL;
7645 }
7646
7647 for (i = 0; i < size; i++) {
7648 pages[i] = alloc_page(gfp_flags);
7649 if (!pages[i]) {
7650 dprintk("%s: failed to allocate page\n", __func__);
7651 nfs4_free_pages(pages, size);
7652 return NULL;
7653 }
7654 }
7655
7656 return pages;
7657}
7658
b1f69b75
AA		 7659static void nfs4_layoutget_release(void *calldata)
7660{
7661 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7662 struct inode *inode = lgp->args.inode;
7663 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7664 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7665
7666 dprintk("--> %s\n", __func__);
8554116e 7667 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7668 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7669 put_nfs_open_context(lgp->args.ctx);
7670 kfree(calldata);
7671 dprintk("<-- %s\n", __func__);
7672}
7673
7674static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7675 .rpc_call_prepare = nfs4_layoutget_prepare,
7676 .rpc_call_done = nfs4_layoutget_done,
7677 .rpc_release = nfs4_layoutget_release,
7678};
7679
a0b0a6e3
TM		 7680struct pnfs_layout_segment *
7681nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7682{
a47970ff
WAA		 7683 struct inode *inode = lgp->args.inode;
7684 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7685 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7686 struct rpc_task *task;
7687 struct rpc_message msg = {
7688 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7689 .rpc_argp = &lgp->args,
7690 .rpc_resp = &lgp->res,
6ab59344 7691 .rpc_cred = lgp->cred,
b1f69b75
AA		 7692 };
7693 struct rpc_task_setup task_setup_data = {
7694 .rpc_client = server->client,
7695 .rpc_message = &msg,
7696 .callback_ops = &nfs4_layoutget_call_ops,
7697 .callback_data = lgp,
7698 .flags = RPC_TASK_ASYNC,
7699 };
a0b0a6e3 7700 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7701 int status = 0;
7702
7703 dprintk("--> %s\n", __func__);
7704
4bd5a980
PT		 7705 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7706 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7707
8554116e
IK		 7708 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7709 if (!lgp->args.layout.pages) {
7710 nfs4_layoutget_release(lgp);
a0b0a6e3 7711 return ERR_PTR(-ENOMEM);
8554116e
IK		 7712 }
7713 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7714 lgp->args.timestamp = jiffies;
8554116e 7715
35124a09 7716 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7717 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7718 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 7719
b1f69b75
AA		 7720 task = rpc_run_task(&task_setup_data);
7721 if (IS_ERR(task))
a0b0a6e3 7722 return ERR_CAST(task);
b1f69b75 7723 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7724 if (status == 0)
7725 status = task->tk_status;
1037e6ea
TM		 7726 trace_nfs4_layoutget(lgp->args.ctx,
7727 &lgp->args.range,
7728 &lgp->res.range,
7729 status);
085b7a45
WAA		 7730 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7731 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7732 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7733 rpc_put_task(task);
7734 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7735 if (status)
7736 return ERR_PTR(status);
7737 return lseg;
b1f69b75
AA		 7738}
7739
cbe82603
BH		 7740static void
7741nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7742{
7743 struct nfs4_layoutreturn *lrp = calldata;
7744
7745 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7746 nfs41_setup_sequence(lrp->clp->cl_session,
7747 &lrp->args.seq_args,
7748 &lrp->res.seq_res,
7749 task);
cbe82603
BH		 7750}
7751
7752static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7753{
7754 struct nfs4_layoutreturn *lrp = calldata;
7755 struct nfs_server *server;
7756
7757 dprintk("--> %s\n", __func__);
7758
6ba7db34 7759 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7760 return;
7761
7762 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7763 switch (task->tk_status) {
7764 default:
7765 task->tk_status = 0;
7766 case 0:
7767 break;
7768 case -NFS4ERR_DELAY:
8478eaa1 7769 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 7770 break;
d00c5d43 7771 rpc_restart_call_prepare(task);
cbe82603
BH		 7772 return;
7773 }
cbe82603
BH		 7774 dprintk("<-- %s\n", __func__);
7775}
7776
7777static void nfs4_layoutreturn_release(void *calldata)
7778{
7779 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7780 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7781
7782 dprintk("--> %s\n", __func__);
849b286f
TM		 7783 spin_lock(&lo->plh_inode->i_lock);
7784 if (lrp->res.lrs_present)
7785 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7786 lo->plh_block_lgets--;
7787 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7788 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 7789 kfree(calldata);
7790 dprintk("<-- %s\n", __func__);
7791}
7792
7793static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7794 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7795 .rpc_call_done = nfs4_layoutreturn_done,
7796 .rpc_release = nfs4_layoutreturn_release,
7797};
7798
7799int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7800{
7801 struct rpc_task *task;
7802 struct rpc_message msg = {
7803 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7804 .rpc_argp = &lrp->args,
7805 .rpc_resp = &lrp->res,
9556000d 7806 .rpc_cred = lrp->cred,
cbe82603
BH		 7807 };
7808 struct rpc_task_setup task_setup_data = {
1771c577 7809 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7810 .rpc_message = &msg,
7811 .callback_ops = &nfs4_layoutreturn_call_ops,
7812 .callback_data = lrp,
7813 };
7814 int status;
7815
7816 dprintk("--> %s\n", __func__);
a9c92d6b 7817 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7818 task = rpc_run_task(&task_setup_data);
7819 if (IS_ERR(task))
7820 return PTR_ERR(task);
7821 status = task->tk_status;
1037e6ea 7822 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7823 dprintk("<-- %s status=%d\n", __func__, status);
7824 rpc_put_task(task);
7825 return status;
7826}
7827
b1f69b75 7828static int
cd5875fe
TM		 7829_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7830 struct pnfs_device *pdev,
7831 struct rpc_cred *cred)
b1f69b75
AA		 7832{
7833 struct nfs4_getdeviceinfo_args args = {
7834 .pdev = pdev,
7835 };
7836 struct nfs4_getdeviceinfo_res res = {
7837 .pdev = pdev,
7838 };
7839 struct rpc_message msg = {
7840 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7841 .rpc_argp = &args,
7842 .rpc_resp = &res,
cd5875fe 7843 .rpc_cred = cred,
b1f69b75
AA		 7844 };
7845 int status;
7846
7847 dprintk("--> %s\n", __func__);
7c513058 7848 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7849 dprintk("<-- %s status=%d\n", __func__, status);
7850
7851 return status;
7852}
7853
cd5875fe
TM		 7854int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7855 struct pnfs_device *pdev,
7856 struct rpc_cred *cred)
b1f69b75
AA		 7857{
7858 struct nfs4_exception exception = { };
7859 int err;
7860
7861 do {
7862 err = nfs4_handle_exception(server,
cd5875fe 7863 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7864 &exception);
7865 } while (exception.retry);
7866 return err;
7867}
7868EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7869
863a3c6c
AA		 7870static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7871{
7872 struct nfs4_layoutcommit_data *data = calldata;
7873 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7874 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7875
d9afbd1b
TM		 7876 nfs41_setup_sequence(session,
7877 &data->args.seq_args,
7878 &data->res.seq_res,
7879 task);
863a3c6c
AA		 7880}
7881
7882static void
7883nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7884{
7885 struct nfs4_layoutcommit_data *data = calldata;
7886 struct nfs_server *server = NFS_SERVER(data->args.inode);
7887
6ba7db34 7888 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7889 return;
7890
7891 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7892 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7893 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7894 case -NFS4ERR_BADLAYOUT: /* no layout */
7895 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7896 task->tk_status = 0;
e59d27e0 7897 case 0:
e59d27e0
TM		 7898 break;
7899 default:
8478eaa1 7900 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 7901 rpc_restart_call_prepare(task);
7902 return;
7903 }
7904 }
863a3c6c
AA		 7905}
7906
7907static void nfs4_layoutcommit_release(void *calldata)
7908{
7909 struct nfs4_layoutcommit_data *data = calldata;
7910
db29c089 7911 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 7912 nfs_post_op_update_inode_force_wcc(data->args.inode,
7913 data->res.fattr);
863a3c6c
AA		 7914 put_rpccred(data->cred);
7915 kfree(data);
7916}
7917
7918static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7919 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7920 .rpc_call_done = nfs4_layoutcommit_done,
7921 .rpc_release = nfs4_layoutcommit_release,
7922};
7923
7924int
ef311537 7925nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7926{
7927 struct rpc_message msg = {
7928 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7929 .rpc_argp = &data->args,
7930 .rpc_resp = &data->res,
7931 .rpc_cred = data->cred,
7932 };
7933 struct rpc_task_setup task_setup_data = {
7934 .task = &data->task,
7935 .rpc_client = NFS_CLIENT(data->args.inode),
7936 .rpc_message = &msg,
7937 .callback_ops = &nfs4_layoutcommit_ops,
7938 .callback_data = data,
7939 .flags = RPC_TASK_ASYNC,
7940 };
7941 struct rpc_task *task;
7942 int status = 0;
7943
7944 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7945 "lbw: %llu inode %lu\n",
7946 data->task.tk_pid, sync,
7947 data->args.lastbytewritten,
7948 data->args.inode->i_ino);
7949
a9c92d6b 7950 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7951 task = rpc_run_task(&task_setup_data);
7952 if (IS_ERR(task))
7953 return PTR_ERR(task);
ef311537 7954 if (sync == false)
863a3c6c
AA		 7955 goto out;
7956 status = nfs4_wait_for_completion_rpc_task(task);
7957 if (status != 0)
7958 goto out;
7959 status = task->tk_status;
1037e6ea 7960 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7961out:
7962 dprintk("%s: status %d\n", __func__, status);
7963 rpc_put_task(task);
7964 return status;
7965}
fca78d6d 7966
97431204
AA		 7967/**
7968 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7969 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7970 */
fca78d6d
BS		 7971static int
7972_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 7973 struct nfs_fsinfo *info,
7974 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 7975{
7976 struct nfs41_secinfo_no_name_args args = {
7977 .style = SECINFO_STYLE_CURRENT_FH,
7978 };
7979 struct nfs4_secinfo_res res = {
7980 .flavors = flavors,
7981 };
7982 struct rpc_message msg = {
7983 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7984 .rpc_argp = &args,
7985 .rpc_resp = &res,
7986 };
b1b3e136 7987 struct rpc_clnt *clnt = server->client;
7cb852df 7988 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 7989 int status;
7990
7991 if (use_integrity) {
7992 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 7993 cred = nfs4_get_clid_cred(server->nfs_client);
7994 msg.rpc_cred = cred;
b1b3e136
WAA		 7995 }
7996
7997 dprintk("--> %s\n", __func__);
7998 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
7999 &res.seq_res, 0);
8000 dprintk("<-- %s status=%d\n", __func__, status);
8001
7cb852df
WAA		 8002 if (cred)
8003 put_rpccred(cred);
b1b3e136
WAA		 8004
8005 return status;
fca78d6d
BS		 8006}
8007
8008static int
8009nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8010 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8011{
8012 struct nfs4_exception exception = { };
8013 int err;
8014 do {
b1b3e136
WAA		 8015 /* first try using integrity protection */
8016 err = -NFS4ERR_WRONGSEC;
8017
8018 /* try to use integrity protection with machine cred */
8019 if (_nfs4_is_integrity_protected(server->nfs_client))
8020 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8021 flavors, true);
8022
8023 /*
8024 * if unable to use integrity protection, or SECINFO with
8025 * integrity protection returns NFS4ERR_WRONGSEC (which is
8026 * disallowed by spec, but exists in deployed servers) use
8027 * the current filesystem's rpc_client and the user cred.
8028 */
8029 if (err == -NFS4ERR_WRONGSEC)
8030 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8031 flavors, false);
8032
fca78d6d
BS		 8033 switch (err) {
8034 case 0:
8035 case -NFS4ERR_WRONGSEC:
78b19bae 8036 case -ENOTSUPP:
05e9cfb4 8037 goto out;
fca78d6d
BS		 8038 default:
8039 err = nfs4_handle_exception(server, err, &exception);
8040 }
8041 } while (exception.retry);
05e9cfb4 8042out:
fca78d6d
BS		 8043 return err;
8044}
8045
8046static int
8047nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8048 struct nfs_fsinfo *info)
8049{
8050 int err;
8051 struct page *page;
367156d9 8052 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8053 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8054 struct nfs4_secinfo4 *secinfo;
8055 int i;
fca78d6d
BS		 8056
8057 page = alloc_page(GFP_KERNEL);
8058 if (!page) {
8059 err = -ENOMEM;
8060 goto out;
8061 }
8062
8063 flavors = page_address(page);
8064 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8065
8066 /*
8067 * Fall back on "guess and check" method if
8068 * the server doesn't support SECINFO_NO_NAME
8069 */
78b19bae 8070 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8071 err = nfs4_find_root_sec(server, fhandle, info);
8072 goto out_freepage;
8073 }
8074 if (err)
8075 goto out_freepage;
8076
58a8cf12
WAA		 8077 for (i = 0; i < flavors->num_flavors; i++) {
8078 secinfo = &flavors->flavors[i];
8079
8080 switch (secinfo->flavor) {
8081 case RPC_AUTH_NULL:
8082 case RPC_AUTH_UNIX:
8083 case RPC_AUTH_GSS:
8084 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8085 &secinfo->flavor_info);
8086 break;
8087 default:
8088 flavor = RPC_AUTH_MAXFLAVOR;
8089 break;
8090 }
8091
4d4b69dd
WAA		 8092 if (!nfs_auth_info_match(&server->auth_info, flavor))
8093 flavor = RPC_AUTH_MAXFLAVOR;
8094
58a8cf12
WAA		 8095 if (flavor != RPC_AUTH_MAXFLAVOR) {
8096 err = nfs4_lookup_root_sec(server, fhandle,
8097 info, flavor);
8098 if (!err)
8099 break;
8100 }
8101 }
8102
8103 if (flavor == RPC_AUTH_MAXFLAVOR)
8104 err = -EPERM;
fca78d6d
BS		 8105
8106out_freepage:
8107 put_page(page);
8108 if (err == -EACCES)
8109 return -EPERM;
8110out:
8111 return err;
8112}
1cab0652 8113
ab7cb0df
TM		 8114static int _nfs41_test_stateid(struct nfs_server *server,
8115 nfs4_stateid *stateid,
8116 struct rpc_cred *cred)
7d974794
BS		 8117{
8118 int status;
8119 struct nfs41_test_stateid_args args = {
1cab0652 8120 .stateid = stateid,
7d974794
BS		 8121 };
8122 struct nfs41_test_stateid_res res;
8123 struct rpc_message msg = {
8124 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8125 .rpc_argp = &args,
8126 .rpc_resp = &res,
ab7cb0df 8127 .rpc_cred = cred,
7d974794 8128 };
3787d506
WAA		 8129 struct rpc_clnt *rpc_client = server->client;
8130
8131 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8132 &rpc_client, &msg);
1cab0652 8133
38527b15 8134 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8135 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8136 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8137 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8138 &args.seq_args, &res.seq_res);
38527b15
CL		 8139 if (status != NFS_OK) {
8140 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8141 return status;
38527b15
CL		 8142 }
8143 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8144 return -res.status;
7d974794
BS		 8145}
8146
38527b15
CL		 8147/**
8148 * nfs41_test_stateid - perform a TEST_STATEID operation
8149 *
8150 * @server: server / transport on which to perform the operation
8151 * @stateid: state ID to test
ab7cb0df 8152 * @cred: credential
38527b15
CL		 8153 *
8154 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8155 * Otherwise a negative NFS4ERR value is returned if the operation
8156 * failed or the state ID is not currently valid.
8157 */
ab7cb0df
TM		 8158static int nfs41_test_stateid(struct nfs_server *server,
8159 nfs4_stateid *stateid,
8160 struct rpc_cred *cred)
7d974794
BS		 8161{
8162 struct nfs4_exception exception = { };
8163 int err;
8164 do {
ab7cb0df 8165 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8166 if (err != -NFS4ERR_DELAY)
8167 break;
8168 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8169 } while (exception.retry);
8170 return err;
8171}
9aeda35f 8172
7c1d5fae
TM		 8173struct nfs_free_stateid_data {
8174 struct nfs_server *server;
8175 struct nfs41_free_stateid_args args;
9aeda35f 8176 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8177};
8178
8179static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8180{
8181 struct nfs_free_stateid_data *data = calldata;
8182 nfs41_setup_sequence(nfs4_get_session(data->server),
8183 &data->args.seq_args,
8184 &data->res.seq_res,
8185 task);
8186}
8187
8188static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8189{
8190 struct nfs_free_stateid_data *data = calldata;
8191
8192 nfs41_sequence_done(task, &data->res.seq_res);
8193
8194 switch (task->tk_status) {
8195 case -NFS4ERR_DELAY:
8478eaa1 8196 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8197 rpc_restart_call_prepare(task);
8198 }
8199}
8200
8201static void nfs41_free_stateid_release(void *calldata)
8202{
8203 kfree(calldata);
8204}
8205
17f26b12 8206static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8207 .rpc_call_prepare = nfs41_free_stateid_prepare,
8208 .rpc_call_done = nfs41_free_stateid_done,
8209 .rpc_release = nfs41_free_stateid_release,
8210};
8211
8212static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8213 nfs4_stateid *stateid,
ab7cb0df 8214 struct rpc_cred *cred,
7c1d5fae
TM		 8215 bool privileged)
8216{
9aeda35f
BS		 8217 struct rpc_message msg = {
8218 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8219 .rpc_cred = cred,
9aeda35f 8220 };
7c1d5fae
TM		 8221 struct rpc_task_setup task_setup = {
8222 .rpc_client = server->client,
8223 .rpc_message = &msg,
8224 .callback_ops = &nfs41_free_stateid_ops,
8225 .flags = RPC_TASK_ASYNC,
8226 };
8227 struct nfs_free_stateid_data *data;
9aeda35f 8228
3787d506
WAA		 8229 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8230 &task_setup.rpc_client, &msg);
8231
38527b15 8232 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8233 data = kmalloc(sizeof(*data), GFP_NOFS);
8234 if (!data)
8235 return ERR_PTR(-ENOMEM);
8236 data->server = server;
8237 nfs4_stateid_copy(&data->args.stateid, stateid);
8238
8239 task_setup.callback_data = data;
8240
8241 msg.rpc_argp = &data->args;
8242 msg.rpc_resp = &data->res;
a9c92d6b 8243 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8244 if (privileged)
8245 nfs4_set_sequence_privileged(&data->args.seq_args);
8246
8247 return rpc_run_task(&task_setup);
9aeda35f
BS		 8248}
8249
38527b15
CL		 8250/**
8251 * nfs41_free_stateid - perform a FREE_STATEID operation
8252 *
8253 * @server: server / transport on which to perform the operation
8254 * @stateid: state ID to release
ab7cb0df 8255 * @cred: credential
38527b15
CL		 8256 *
8257 * Returns NFS_OK if the server freed "stateid". Otherwise a
8258 * negative NFS4ERR value is returned.
8259 */
ab7cb0df
TM		 8260static int nfs41_free_stateid(struct nfs_server *server,
8261 nfs4_stateid *stateid,
8262 struct rpc_cred *cred)
9aeda35f 8263{
7c1d5fae
TM		 8264 struct rpc_task *task;
8265 int ret;
8266
ab7cb0df 8267 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8268 if (IS_ERR(task))
8269 return PTR_ERR(task);
8270 ret = rpc_wait_for_completion_task(task);
8271 if (!ret)
8272 ret = task->tk_status;
8273 rpc_put_task(task);
8274 return ret;
9aeda35f 8275}
36281caa 8276
f1cdae87
JL		 8277static void
8278nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8279{
8280 struct rpc_task *task;
ab7cb0df 8281 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8282
ab7cb0df 8283 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8284 nfs4_free_lock_state(server, lsp);
8285 if (IS_ERR(task))
f1cdae87 8286 return;
c8b2d0bf 8287 rpc_put_task(task);
c8b2d0bf
TM		 8288}
8289
36281caa
TM		 8290static bool nfs41_match_stateid(const nfs4_stateid *s1,
8291 const nfs4_stateid *s2)
8292{
2d2f24ad 8293 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8294 return false;
8295
2d2f24ad 8296 if (s1->seqid == s2->seqid)
36281caa 8297 return true;
2d2f24ad 8298 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8299 return true;
8300
8301 return false;
8302}
8303
557134a3
AA		 8304#endif /* CONFIG_NFS_V4_1 */
8305
36281caa
TM		 8306static bool nfs4_match_stateid(const nfs4_stateid *s1,
8307 const nfs4_stateid *s2)
8308{
f597c537 8309 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8310}
8311
8312
17280175 8313static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8314 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8315 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8316 .recover_open = nfs4_open_reclaim,
8317 .recover_lock = nfs4_lock_reclaim,
591d71cb 8318 .establish_clid = nfs4_init_clientid,
05f4c350 8319 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8320};
8321
591d71cb 8322#if defined(CONFIG_NFS_V4_1)
17280175 8323static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8324 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8325 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8326 .recover_open = nfs4_open_reclaim,
8327 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8328 .establish_clid = nfs41_init_clientid,
fce5c838 8329 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8330 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8331};
8332#endif /* CONFIG_NFS_V4_1 */
8333
17280175 8334static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8335 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8336 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8337 .recover_open = nfs40_open_expired,
591d71cb
AA		 8338 .recover_lock = nfs4_lock_expired,
8339 .establish_clid = nfs4_init_clientid,
8340};
8341
8342#if defined(CONFIG_NFS_V4_1)
17280175 8343static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8344 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8345 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8346 .recover_open = nfs41_open_expired,
8347 .recover_lock = nfs41_lock_expired,
4d643d1d 8348 .establish_clid = nfs41_init_clientid,
1da177e4 8349};
591d71cb 8350#endif /* CONFIG_NFS_V4_1 */
1da177e4 8351
17280175 8352static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8353 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8354 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8355 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8356};
8357
8358#if defined(CONFIG_NFS_V4_1)
17280175 8359static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8360 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8361 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8362 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8363};
8364#endif
8365
ec011fe8 8366static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8367 .get_locations = _nfs40_proc_get_locations,
44c99933 8368 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8369};
8370
8371#if defined(CONFIG_NFS_V4_1)
8372static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8373 .get_locations = _nfs41_proc_get_locations,
44c99933 8374 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8375};
8376#endif /* CONFIG_NFS_V4_1 */
8377
97dc1359
TM		 8378static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8379 .minor_version = 0,
39c6daae
TM		 8380 .init_caps = NFS_CAP_READDIRPLUS
8381 | NFS_CAP_ATOMIC_OPEN
8382 | NFS_CAP_CHANGE_ATTR
8383 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8384 .init_client = nfs40_init_client,
8385 .shutdown_client = nfs40_shutdown_client,
36281caa 8386 .match_stateid = nfs4_match_stateid,
fca78d6d 8387 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8388 .free_lock_state = nfs4_release_lockowner,
9915ea7e 8389 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8390 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8391 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8392 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8393 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8394};
8395
8396#if defined(CONFIG_NFS_V4_1)
8397static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8398 .minor_version = 1,
39c6daae
TM		 8399 .init_caps = NFS_CAP_READDIRPLUS
8400 | NFS_CAP_ATOMIC_OPEN
8401 | NFS_CAP_CHANGE_ATTR
3b66486c 8402 | NFS_CAP_POSIX_LOCK
49f9a0fa 8403 | NFS_CAP_STATEID_NFSV41
e983120e 8404 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8405 .init_client = nfs41_init_client,
8406 .shutdown_client = nfs41_shutdown_client,
36281caa 8407 .match_stateid = nfs41_match_stateid,
fca78d6d 8408 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8409 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8410 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8411 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8412 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8413 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8414 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8415};
8416#endif
8417
42c2c424
SD		 8418#if defined(CONFIG_NFS_V4_2)
8419static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8420 .minor_version = 2,
7017310a
BS		 8421 .init_caps = NFS_CAP_READDIRPLUS
8422 | NFS_CAP_ATOMIC_OPEN
8423 | NFS_CAP_CHANGE_ATTR
8424 | NFS_CAP_POSIX_LOCK
8425 | NFS_CAP_STATEID_NFSV41
e983120e 8426 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8427 | NFS_CAP_ALLOCATE
624bd5b7 8428 | NFS_CAP_DEALLOCATE
e983120e 8429 | NFS_CAP_SEEK,
abf79bb3
CL		 8430 .init_client = nfs41_init_client,
8431 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8432 .match_stateid = nfs41_match_stateid,
8433 .find_root_sec = nfs41_find_root_sec,
7017310a 8434 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8435 .call_sync_ops = &nfs41_call_sync_ops,
42c2c424
SD		 8436 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8437 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8438 .state_renewal_ops = &nfs41_state_renewal_ops,
8439};
8440#endif
8441
97dc1359
TM		 8442const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8443 [0] = &nfs_v4_0_minor_ops,
8444#if defined(CONFIG_NFS_V4_1)
8445 [1] = &nfs_v4_1_minor_ops,
8446#endif
42c2c424
SD		 8447#if defined(CONFIG_NFS_V4_2)
8448 [2] = &nfs_v4_2_minor_ops,
8449#endif
97dc1359
TM		 8450};
8451
17f26b12 8452static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8453 .create = nfs_create,
8454 .lookup = nfs_lookup,
8455 .atomic_open = nfs_atomic_open,
8456 .link = nfs_link,
8457 .unlink = nfs_unlink,
8458 .symlink = nfs_symlink,
8459 .mkdir = nfs_mkdir,
8460 .rmdir = nfs_rmdir,
8461 .mknod = nfs_mknod,
8462 .rename = nfs_rename,
8463 .permission = nfs_permission,
8464 .getattr = nfs_getattr,
8465 .setattr = nfs_setattr,
8466 .getxattr = generic_getxattr,
8467 .setxattr = generic_setxattr,
8468 .listxattr = generic_listxattr,
8469 .removexattr = generic_removexattr,
8470};
8471
92e1d5be 8472static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8473 .permission = nfs_permission,
8474 .getattr = nfs_getattr,
8475 .setattr = nfs_setattr,
64c2ce8b
AK		 8476 .getxattr = generic_getxattr,
8477 .setxattr = generic_setxattr,
8478 .listxattr = generic_listxattr,
8479 .removexattr = generic_removexattr,
6b3b5496
BF		 8480};
8481
509de811 8482const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8483 .version = 4, /* protocol version */
8484 .dentry_ops = &nfs4_dentry_operations,
8485 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8486 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8487 .file_ops = &nfs4_file_operations,
1da177e4 8488 .getroot = nfs4_proc_get_root,
281cad46 8489 .submount = nfs4_submount,
ff9099f2 8490 .try_mount = nfs4_try_mount,
1da177e4
LT		 8491 .getattr = nfs4_proc_getattr,
8492 .setattr = nfs4_proc_setattr,
8493 .lookup = nfs4_proc_lookup,
8494 .access = nfs4_proc_access,
8495 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8496 .create = nfs4_proc_create,
8497 .remove = nfs4_proc_remove,
8498 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8499 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8500 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8501 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8502 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8503 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8504 .link = nfs4_proc_link,
8505 .symlink = nfs4_proc_symlink,
8506 .mkdir = nfs4_proc_mkdir,
8507 .rmdir = nfs4_proc_remove,
8508 .readdir = nfs4_proc_readdir,
8509 .mknod = nfs4_proc_mknod,
8510 .statfs = nfs4_proc_statfs,
8511 .fsinfo = nfs4_proc_fsinfo,
8512 .pathconf = nfs4_proc_pathconf,
e9326dca 8513 .set_capabilities = nfs4_server_capabilities,
1da177e4 8514 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8515 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8516 .read_setup = nfs4_proc_read_setup,
ec06c096 8517 .read_done = nfs4_read_done,
1da177e4 8518 .write_setup = nfs4_proc_write_setup,
788e7a89 8519 .write_done = nfs4_write_done,
1da177e4 8520 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8521 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8522 .commit_done = nfs4_commit_done,
1da177e4 8523 .lock = nfs4_proc_lock,
e50a1c2e 8524 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8525 .close_context = nfs4_close_context,
2b484297 8526 .open_context = nfs4_atomic_open,
011e2a7f 8527 .have_delegation = nfs4_have_delegation,
57ec14c5 8528 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8529 .alloc_client = nfs4_alloc_client,
45a52a02 8530 .init_client = nfs4_init_client,
cdb7eced 8531 .free_client = nfs4_free_client,
1179acc6
BS		 8532 .create_server = nfs4_create_server,
8533 .clone_server = nfs_clone_server,
1da177e4
LT		 8534};
8535
64c2ce8b
AK		 8536static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8537 .prefix = XATTR_NAME_NFSV4_ACL,
8538 .list = nfs4_xattr_list_nfs4_acl,
8539 .get = nfs4_xattr_get_nfs4_acl,
8540 .set = nfs4_xattr_set_nfs4_acl,
8541};
8542
8543const struct xattr_handler *nfs4_xattr_handlers[] = {
8544 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8545#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8546 &nfs4_xattr_nfs4_label_handler,
8547#endif
64c2ce8b
AK		 8548 NULL
8549};
8550
1da177e4
LT		 8551/*
8552 * Local variables:
8553 * c-basic-offset: 8
8554 * End:
8555 */
Linux 6.x block layer and io_uring tree(s)