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nfs41: add range to layoutreturn args
[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
cb04ad2a
PT		 498int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
499 struct nfs4_sequence_args *args,
500 struct nfs4_sequence_res *res,
501 struct rpc_task *task)
3bd2384a 502{
3bd2384a
CL		 503 struct nfs4_slot *slot;
504
505 /* slot already allocated? */
506 if (res->sr_slot != NULL)
507 goto out_start;
508
509 spin_lock(&tbl->slot_tbl_lock);
510 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
511 goto out_sleep;
512
513 slot = nfs4_alloc_slot(tbl);
514 if (IS_ERR(slot)) {
515 if (slot == ERR_PTR(-ENOMEM))
516 task->tk_timeout = HZ >> 2;
517 goto out_sleep;
518 }
519 spin_unlock(&tbl->slot_tbl_lock);
520
521 args->sa_slot = slot;
522 res->sr_slot = slot;
523
524out_start:
525 rpc_call_start(task);
526 return 0;
527
528out_sleep:
529 if (args->sa_privileged)
530 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
531 NULL, RPC_PRIORITY_PRIVILEGED);
532 else
533 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
534 spin_unlock(&tbl->slot_tbl_lock);
535 return -EAGAIN;
536}
cb04ad2a 537EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
3bd2384a
CL		 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
2c4b131d 697int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 698{
e3725ec0 699 if (res->sr_slot == NULL)
14516c3a 700 return 1;
3bd2384a
CL		 701 if (!res->sr_slot->table->session)
702 return nfs40_sequence_done(task, res);
14516c3a 703 return nfs41_sequence_done(task, res);
df896455 704}
2c4b131d 705EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 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 779 if (!session)
cb04ad2a
PT		 780 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
781 args, res, task);
035168ab 782
e8d92382 783 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 784 __func__, session->clp, session, res->sr_slot ?
e8d92382 785 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 786
9d12b216 787 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 788
ce5039c1
AA		 789 dprintk("<-- %s status=%d\n", __func__, ret);
790 return ret;
791}
792
ce5039c1
AA		 793static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
794{
2a3eb2b9 795 struct nfs4_call_sync_data *data = calldata;
6ba7db34 796 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 797
035168ab
TM		 798 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
799
d9afbd1b 800 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 801}
802
69ab40c4
AA		 803static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
804{
2a3eb2b9 805 struct nfs4_call_sync_data *data = calldata;
69ab40c4 806
14516c3a 807 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 808}
809
17280175 810static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 811 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 812 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 813};
814
3bd2384a
CL		 815#else /* !CONFIG_NFS_V4_1 */
816
9915ea7e
CL		 817static int nfs4_setup_sequence(const struct nfs_server *server,
818 struct nfs4_sequence_args *args,
819 struct nfs4_sequence_res *res,
820 struct rpc_task *task)
821{
cb04ad2a
PT		 822 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
823 args, res, task);
9915ea7e
CL		 824}
825
2c4b131d
PT		 826int nfs4_sequence_done(struct rpc_task *task,
827 struct nfs4_sequence_res *res)
9915ea7e 828{
3bd2384a 829 return nfs40_sequence_done(task, res);
9915ea7e 830}
2c4b131d 831EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 832
833#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 834
835static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
836{
837 struct nfs4_call_sync_data *data = calldata;
838 nfs4_setup_sequence(data->seq_server,
839 data->seq_args, data->seq_res, task);
840}
841
842static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
843{
844 struct nfs4_call_sync_data *data = calldata;
845 nfs4_sequence_done(task, data->seq_res);
846}
847
848static const struct rpc_call_ops nfs40_call_sync_ops = {
849 .rpc_call_prepare = nfs40_call_sync_prepare,
850 .rpc_call_done = nfs40_call_sync_done,
851};
852
7c513058
BS		 853static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
854 struct nfs_server *server,
ce5039c1
AA		 855 struct rpc_message *msg,
856 struct nfs4_sequence_args *args,
8fe72bac 857 struct nfs4_sequence_res *res)
ce5039c1
AA		 858{
859 int ret;
860 struct rpc_task *task;
9915ea7e 861 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 862 struct nfs4_call_sync_data data = {
035168ab 863 .seq_server = server,
ce5039c1
AA		 864 .seq_args = args,
865 .seq_res = res,
ce5039c1
AA		 866 };
867 struct rpc_task_setup task_setup = {
7c513058 868 .rpc_client = clnt,
ce5039c1 869 .rpc_message = msg,
9915ea7e 870 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 871 .callback_data = &data
872 };
873
ce5039c1
AA		 874 task = rpc_run_task(&task_setup);
875 if (IS_ERR(task))
876 ret = PTR_ERR(task);
877 else {
878 ret = task->tk_status;
879 rpc_put_task(task);
880 }
881 return ret;
882}
883
7c513058
BS		 884int nfs4_call_sync(struct rpc_clnt *clnt,
885 struct nfs_server *server,
e73b83f2
BS		 886 struct rpc_message *msg,
887 struct nfs4_sequence_args *args,
888 struct nfs4_sequence_res *res,
889 int cache_reply)
890{
a9c92d6b 891 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 892 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 893}
cccef3b9 894
38478b24 895static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 896{
38478b24 897 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 898
38478b24 899 spin_lock(&dir->i_lock);
359d7d1c 900 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 901 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 902 nfs_force_lookup_revalidate(dir);
a9a4a87a 903 dir->i_version = cinfo->after;
de242c0b 904 nfs_fscache_invalidate(dir);
38478b24 905 spin_unlock(&dir->i_lock);
1da177e4
LT		 906}
907
e56e0b78 908struct nfs4_opendata {
c6d00e63 909 struct kref kref;
e56e0b78
TM		 910 struct nfs_openargs o_arg;
911 struct nfs_openres o_res;
cdd4e68b
TM		 912 struct nfs_open_confirmargs c_arg;
913 struct nfs_open_confirmres c_res;
6926afd1
TM		 914 struct nfs4_string owner_name;
915 struct nfs4_string group_name;
e56e0b78 916 struct nfs_fattr f_attr;
1775fd3e 917 struct nfs4_label *f_label;
e56e0b78 918 struct dentry *dir;
82a2c1b7 919 struct dentry *dentry;
e56e0b78 920 struct nfs4_state_owner *owner;
aac00a8d 921 struct nfs4_state *state;
e56e0b78 922 struct iattr attrs;
26e976a8 923 unsigned long timestamp;
3e309914 924 unsigned int rpc_done : 1;
5bc2afc2 925 unsigned int file_created : 1;
bdeca1b7 926 unsigned int is_recover : 1;
24ac23ab
TM		 927 int rpc_status;
928 int cancelled;
e56e0b78
TM		 929};
930
49f9a0fa
TM		 931static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
932 int err, struct nfs4_exception *exception)
933{
934 if (err != -EINVAL)
935 return false;
936 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
937 return false;
938 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
939 exception->retry = 1;
940 return true;
941}
942
943static enum open_claim_type4
944nfs4_map_atomic_open_claim(struct nfs_server *server,
945 enum open_claim_type4 claim)
946{
947 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
948 return claim;
949 switch (claim) {
950 default:
951 return claim;
952 case NFS4_OPEN_CLAIM_FH:
953 return NFS4_OPEN_CLAIM_NULL;
954 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
955 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
956 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
957 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
958 }
959}
2ced46c2
TM		 960
961static void nfs4_init_opendata_res(struct nfs4_opendata *p)
962{
963 p->o_res.f_attr = &p->f_attr;
1775fd3e 964 p->o_res.f_label = p->f_label;
c1d51931
TM		 965 p->o_res.seqid = p->o_arg.seqid;
966 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 967 p->o_res.server = p->o_arg.server;
5f657530 968 p->o_res.access_request = p->o_arg.access;
2ced46c2 969 nfs_fattr_init(&p->f_attr);
6926afd1 970 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 971}
972
82a2c1b7 973static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 974 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 975 const struct iattr *attrs,
1775fd3e 976 struct nfs4_label *label,
4a1c0893 977 enum open_claim_type4 claim,
8535b2be 978 gfp_t gfp_mask)
e56e0b78 979{
82a2c1b7 980 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 981 struct inode *dir = parent->d_inode;
982 struct nfs_server *server = NFS_SERVER(dir);
983 struct nfs4_opendata *p;
984
8535b2be 985 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 986 if (p == NULL)
987 goto err;
14c43f76
DQ		 988
989 p->f_label = nfs4_label_alloc(server, gfp_mask);
990 if (IS_ERR(p->f_label))
991 goto err_free_p;
992
8535b2be 993 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 994 if (p->o_arg.seqid == NULL)
14c43f76 995 goto err_free_label;
82a2c1b7
AV		 996 nfs_sb_active(dentry->d_sb);
997 p->dentry = dget(dentry);
e56e0b78
TM		 998 p->dir = parent;
999 p->owner = sp;
1000 atomic_inc(&sp->so_count);
dc0b027d
TM		 1001 p->o_arg.open_flags = flags;
1002 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 1003 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1004 * will return permission denied for all bits until close */
1005 if (!(flags & O_EXCL)) {
1006 /* ask server to check for all possible rights as results
1007 * are cached */
1008 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1009 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1010 }
7539bbab 1011 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1012 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1013 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1014 p->o_arg.name = &dentry->d_name;
e56e0b78 1015 p->o_arg.server = server;
aa9c2669 1016 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1017 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1018 p->o_arg.label = label;
49f9a0fa
TM		 1019 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1020 switch (p->o_arg.claim) {
4a1c0893
TM		 1021 case NFS4_OPEN_CLAIM_NULL:
1022 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1023 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1024 p->o_arg.fh = NFS_FH(dir);
1025 break;
1026 case NFS4_OPEN_CLAIM_PREVIOUS:
1027 case NFS4_OPEN_CLAIM_FH:
1028 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1029 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1030 p->o_arg.fh = NFS_FH(dentry->d_inode);
1031 }
536e43d1 1032 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1033 __u32 verf[2];
d77d76ff 1034
e56e0b78
TM		 1035 p->o_arg.u.attrs = &p->attrs;
1036 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1037
1038 verf[0] = jiffies;
1039 verf[1] = current->pid;
1040 memcpy(p->o_arg.u.verifier.data, verf,
1041 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1042 }
cdd4e68b
TM		 1043 p->c_arg.fh = &p->o_res.fh;
1044 p->c_arg.stateid = &p->o_res.stateid;
1045 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1046 nfs4_init_opendata_res(p);
c6d00e63 1047 kref_init(&p->kref);
e56e0b78 1048 return p;
14c43f76
DQ		 1049
1050err_free_label:
1051 nfs4_label_free(p->f_label);
1052err_free_p:
e56e0b78
TM		 1053 kfree(p);
1054err:
1055 dput(parent);
1056 return NULL;
1057}
1058
c6d00e63 1059static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1060{
c6d00e63
TM		 1061 struct nfs4_opendata *p = container_of(kref,
1062 struct nfs4_opendata, kref);
82a2c1b7 1063 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1064
1065 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1066 if (p->state != NULL)
1067 nfs4_put_open_state(p->state);
c6d00e63 1068 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1069
1070 nfs4_label_free(p->f_label);
1071
c6d00e63 1072 dput(p->dir);
82a2c1b7
AV		 1073 dput(p->dentry);
1074 nfs_sb_deactive(sb);
6926afd1 1075 nfs_fattr_free_names(&p->f_attr);
e911b815 1076 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1077 kfree(p);
1078}
1079
1080static void nfs4_opendata_put(struct nfs4_opendata *p)
1081{
1082 if (p != NULL)
1083 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1084}
1085
06f814a3
TM		 1086static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1087{
06f814a3
TM		 1088 int ret;
1089
06f814a3 1090 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1091 return ret;
1092}
1093
dc0b027d 1094static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1095{
1096 int ret = 0;
dc0b027d 1097
536e43d1 1098 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1099 goto out;
1100 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1101 case FMODE_READ:
88069f77
TM		 1102 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1103 && state->n_rdonly != 0;
6ee41268
TM		 1104 break;
1105 case FMODE_WRITE:
88069f77
TM		 1106 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1107 && state->n_wronly != 0;
6ee41268
TM		 1108 break;
1109 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1110 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1111 && state->n_rdwr != 0;
6ee41268 1112 }
dc0b027d 1113out:
6ee41268
TM		 1114 return ret;
1115}
1116
dc0b027d 1117static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1118{
652f89f6
TM		 1119 if (delegation == NULL)
1120 return 0;
dc0b027d 1121 if ((delegation->type & fmode) != fmode)
aac00a8d 1122 return 0;
d25be546
TM		 1123 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1124 return 0;
b7391f44 1125 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1126 return 1;
1127}
1128
dc0b027d 1129static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1130{
dc0b027d 1131 switch (fmode) {
e7616923
TM		 1132 case FMODE_WRITE:
1133 state->n_wronly++;
1134 break;
1135 case FMODE_READ:
1136 state->n_rdonly++;
1137 break;
1138 case FMODE_READ|FMODE_WRITE:
1139 state->n_rdwr++;
1140 }
dc0b027d 1141 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1142}
1143
4f14c194
TM		 1144static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1145{
1146 struct nfs_client *clp = state->owner->so_server->nfs_client;
1147 bool need_recover = false;
1148
1149 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1150 need_recover = true;
1151 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1152 need_recover = true;
1153 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1154 need_recover = true;
1155 if (need_recover)
1156 nfs4_state_mark_reclaim_nograce(clp, state);
1157}
1158
e999e80e
TM		 1159static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1160 nfs4_stateid *stateid)
1161{
1162 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1163 return true;
4f14c194
TM		 1164 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1165 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1166 return true;
4f14c194 1167 }
e999e80e
TM		 1168 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1169 return true;
1170 return false;
1171}
1172
226056c5
TM		 1173static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1174 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1175{
226056c5
TM		 1176 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1177 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1178 case FMODE_WRITE:
1179 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1180 break;
1181 case FMODE_READ:
1182 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1183 break;
1184 case 0:
1185 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1186 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1187 clear_bit(NFS_OPEN_STATE, &state->flags);
1188 }
1189 if (stateid == NULL)
1190 return;
1191 if (!nfs_need_update_open_stateid(state, stateid))
1192 return;
003707c7 1193 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1194 nfs4_stateid_copy(&state->stateid, stateid);
1195 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1196}
1197
1198static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1199{
1200 write_seqlock(&state->seqlock);
1201 nfs_clear_open_stateid_locked(state, stateid, fmode);
1202 write_sequnlock(&state->seqlock);
4f14c194
TM		 1203 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1204 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1205}
1206
dc0b027d 1207static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1208{
dc0b027d 1209 switch (fmode) {
003707c7
TM		 1210 case FMODE_READ:
1211 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1212 break;
1213 case FMODE_WRITE:
1214 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1215 break;
1216 case FMODE_READ|FMODE_WRITE:
1217 set_bit(NFS_O_RDWR_STATE, &state->flags);
1218 }
e999e80e
TM		 1219 if (!nfs_need_update_open_stateid(state, stateid))
1220 return;
1221 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1222 nfs4_stateid_copy(&state->stateid, stateid);
1223 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1224}
1225
dc0b027d 1226static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1227{
8bda4e4c
TM		 1228 /*
1229 * Protect the call to nfs4_state_set_mode_locked and
1230 * serialise the stateid update
1231 */
1232 write_seqlock(&state->seqlock);
003707c7 1233 if (deleg_stateid != NULL) {
f597c537 1234 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1235 set_bit(NFS_DELEGATED_STATE, &state->flags);
1236 }
1237 if (open_stateid != NULL)
dc0b027d 1238 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1239 write_sequnlock(&state->seqlock);
1240 spin_lock(&state->owner->so_lock);
dc0b027d 1241 update_open_stateflags(state, fmode);
ec073428 1242 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1243}
1244
dc0b027d 1245static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1246{
1247 struct nfs_inode *nfsi = NFS_I(state->inode);
1248 struct nfs_delegation *deleg_cur;
1249 int ret = 0;
1250
dc0b027d 1251 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1252
1253 rcu_read_lock();
1254 deleg_cur = rcu_dereference(nfsi->delegation);
1255 if (deleg_cur == NULL)
1256 goto no_delegation;
1257
1258 spin_lock(&deleg_cur->lock);
17f26b12 1259 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1260 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1261 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1262 goto no_delegation_unlock;
1263
1264 if (delegation == NULL)
1265 delegation = &deleg_cur->stateid;
f597c537 1266 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1267 goto no_delegation_unlock;
1268
b7391f44 1269 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1270 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1271 ret = 1;
1272no_delegation_unlock:
1273 spin_unlock(&deleg_cur->lock);
1274no_delegation:
1275 rcu_read_unlock();
1276
1277 if (!ret && open_stateid != NULL) {
dc0b027d 1278 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1279 ret = 1;
1280 }
4f14c194
TM		 1281 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1282 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1283
1284 return ret;
1285}
1286
1287
dc0b027d 1288static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1289{
1290 struct nfs_delegation *delegation;
1291
1292 rcu_read_lock();
1293 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1294 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1295 rcu_read_unlock();
1296 return;
1297 }
1298 rcu_read_unlock();
57ec14c5 1299 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1300}
1301
6ee41268 1302static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1303{
1304 struct nfs4_state *state = opendata->state;
1305 struct nfs_inode *nfsi = NFS_I(state->inode);
1306 struct nfs_delegation *delegation;
f448badd 1307 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1308 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1309 nfs4_stateid stateid;
1310 int ret = -EAGAIN;
1311
aac00a8d 1312 for (;;) {
61beef75 1313 spin_lock(&state->owner->so_lock);
dc0b027d 1314 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1315 update_open_stateflags(state, fmode);
6ee41268 1316 spin_unlock(&state->owner->so_lock);
61beef75 1317 goto out_return_state;
6ee41268 1318 }
61beef75 1319 spin_unlock(&state->owner->so_lock);
34310430
TM		 1320 rcu_read_lock();
1321 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1322 if (!can_open_delegated(delegation, fmode)) {
34310430 1323 rcu_read_unlock();
aac00a8d 1324 break;
34310430 1325 }
aac00a8d 1326 /* Save the delegation */
f597c537 1327 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1328 rcu_read_unlock();
fa332941 1329 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1330 if (!opendata->is_recover) {
1331 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1332 if (ret != 0)
1333 goto out;
1334 }
aac00a8d 1335 ret = -EAGAIN;
34310430
TM		 1336
1337 /* Try to update the stateid using the delegation */
dc0b027d 1338 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1339 goto out_return_state;
aac00a8d 1340 }
aac00a8d
TM		 1341out:
1342 return ERR_PTR(ret);
1343out_return_state:
1344 atomic_inc(&state->count);
1345 return state;
1346}
1347
e23008ec
AA		 1348static void
1349nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1350{
1351 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1352 struct nfs_delegation *delegation;
1353 int delegation_flags = 0;
1354
1355 rcu_read_lock();
1356 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1357 if (delegation)
1358 delegation_flags = delegation->flags;
1359 rcu_read_unlock();
1360 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1361 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1362 "returning a delegation for "
1363 "OPEN(CLAIM_DELEGATE_CUR)\n",
1364 clp->cl_hostname);
1365 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1366 nfs_inode_set_delegation(state->inode,
1367 data->owner->so_cred,
1368 &data->o_res);
1369 else
1370 nfs_inode_reclaim_delegation(state->inode,
1371 data->owner->so_cred,
1372 &data->o_res);
1373}
1374
1375/*
1376 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1377 * and update the nfs4_state.
1378 */
1379static struct nfs4_state *
1380_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1381{
1382 struct inode *inode = data->state->inode;
1383 struct nfs4_state *state = data->state;
1384 int ret;
1385
d2bfda2e
WAA		 1386 if (!data->rpc_done) {
1387 if (data->rpc_status) {
1388 ret = data->rpc_status;
1389 goto err;
1390 }
1391 /* cached opens have already been processed */
1392 goto update;
e23008ec
AA		 1393 }
1394
e23008ec
AA		 1395 ret = nfs_refresh_inode(inode, &data->f_attr);
1396 if (ret)
1397 goto err;
1398
1399 if (data->o_res.delegation_type != 0)
1400 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1401update:
e23008ec
AA		 1402 update_open_stateid(state, &data->o_res.stateid, NULL,
1403 data->o_arg.fmode);
d49f042a 1404 atomic_inc(&state->count);
e23008ec
AA		 1405
1406 return state;
1407err:
1408 return ERR_PTR(ret);
1409
1410}
1411
1412static struct nfs4_state *
1413_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1414{
1415 struct inode *inode;
1416 struct nfs4_state *state = NULL;
1b370bc2 1417 int ret;
24ac23ab 1418
aac00a8d 1419 if (!data->rpc_done) {
6ee41268 1420 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1421 goto out;
1422 }
1423
1b370bc2 1424 ret = -EAGAIN;
24ac23ab 1425 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1426 goto err;
1775fd3e 1427 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1428 ret = PTR_ERR(inode);
03f28e3a 1429 if (IS_ERR(inode))
1b370bc2
TM		 1430 goto err;
1431 ret = -ENOMEM;
24ac23ab
TM		 1432 state = nfs4_get_open_state(inode, data->owner);
1433 if (state == NULL)
1b370bc2 1434 goto err_put_inode;
e23008ec
AA		 1435 if (data->o_res.delegation_type != 0)
1436 nfs4_opendata_check_deleg(data, state);
34310430 1437 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1438 data->o_arg.fmode);
24ac23ab 1439 iput(inode);
aac00a8d 1440out:
7aa262b5 1441 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1442 return state;
1b370bc2
TM		 1443err_put_inode:
1444 iput(inode);
1445err:
1446 return ERR_PTR(ret);
24ac23ab
TM		 1447}
1448
e23008ec
AA		 1449static struct nfs4_state *
1450nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1451{
1452 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1453 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1454 return _nfs4_opendata_to_nfs4_state(data);
1455}
1456
864472e9
TM		 1457static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1458{
1459 struct nfs_inode *nfsi = NFS_I(state->inode);
1460 struct nfs_open_context *ctx;
1461
1462 spin_lock(&state->inode->i_lock);
1463 list_for_each_entry(ctx, &nfsi->open_files, list) {
1464 if (ctx->state != state)
1465 continue;
1466 get_nfs_open_context(ctx);
1467 spin_unlock(&state->inode->i_lock);
1468 return ctx;
1469 }
1470 spin_unlock(&state->inode->i_lock);
1471 return ERR_PTR(-ENOENT);
1472}
1473
4a1c0893
TM		 1474static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1475 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1476{
1477 struct nfs4_opendata *opendata;
1478
4a1c0893 1479 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1480 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1481 if (opendata == NULL)
1482 return ERR_PTR(-ENOMEM);
1483 opendata->state = state;
1484 atomic_inc(&state->count);
1485 return opendata;
1486}
1487
dc0b027d 1488static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1489{
2ced46c2 1490 struct nfs4_state *newstate;
864472e9
TM		 1491 int ret;
1492
dc0b027d
TM		 1493 opendata->o_arg.open_flags = 0;
1494 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1495 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1496 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1497 nfs4_init_opendata_res(opendata);
b257957e 1498 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1499 if (ret != 0)
1500 return ret;
2ced46c2 1501 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1502 if (IS_ERR(newstate))
1503 return PTR_ERR(newstate);
643168c2 1504 nfs4_close_state(newstate, fmode);
2ced46c2 1505 *res = newstate;
864472e9
TM		 1506 return 0;
1507}
1508
1509static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1510{
864472e9 1511 struct nfs4_state *newstate;
864472e9
TM		 1512 int ret;
1513
4f14c194
TM		 1514 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1515 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1516 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1517 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1518 /* memory barrier prior to reading state->n_* */
2ced46c2 1519 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1520 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1521 smp_rmb();
1522 if (state->n_rdwr != 0) {
2ced46c2 1523 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1524 if (ret != 0)
1525 return ret;
2ced46c2
TM		 1526 if (newstate != state)
1527 return -ESTALE;
864472e9
TM		 1528 }
1529 if (state->n_wronly != 0) {
2ced46c2 1530 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1531 if (ret != 0)
1532 return ret;
2ced46c2
TM		 1533 if (newstate != state)
1534 return -ESTALE;
864472e9
TM		 1535 }
1536 if (state->n_rdonly != 0) {
2ced46c2 1537 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1538 if (ret != 0)
1539 return ret;
2ced46c2
TM		 1540 if (newstate != state)
1541 return -ESTALE;
864472e9 1542 }
1ac7e2fd
TM		 1543 /*
1544 * We may have performed cached opens for all three recoveries.
1545 * Check if we need to update the current stateid.
1546 */
1547 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1548 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1549 write_seqlock(&state->seqlock);
1ac7e2fd 1550 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1551 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1552 write_sequnlock(&state->seqlock);
1ac7e2fd 1553 }
864472e9
TM		 1554 return 0;
1555}
1556
1da177e4
LT		 1557/*
1558 * OPEN_RECLAIM:
1559 * reclaim state on the server after a reboot.
1da177e4 1560 */
539cd03a 1561static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1562{
1ac7e2fd 1563 struct nfs_delegation *delegation;
864472e9 1564 struct nfs4_opendata *opendata;
dc0b027d 1565 fmode_t delegation_type = 0;
1da177e4
LT		 1566 int status;
1567
4a1c0893
TM		 1568 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1569 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1570 if (IS_ERR(opendata))
1571 return PTR_ERR(opendata);
1ac7e2fd
TM		 1572 rcu_read_lock();
1573 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1574 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1575 delegation_type = delegation->type;
1ac7e2fd 1576 rcu_read_unlock();
864472e9
TM		 1577 opendata->o_arg.u.delegation_type = delegation_type;
1578 status = nfs4_open_recover(opendata, state);
c6d00e63 1579 nfs4_opendata_put(opendata);
1da177e4
LT		 1580 return status;
1581}
1582
539cd03a 1583static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1584{
1585 struct nfs_server *server = NFS_SERVER(state->inode);
1586 struct nfs4_exception exception = { };
1587 int err;
1588 do {
539cd03a 1589 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1590 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1591 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1592 continue;
168667c4 1593 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1594 break;
1595 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1596 } while (exception.retry);
1597 return err;
1598}
1599
864472e9
TM		 1600static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1601{
1602 struct nfs_open_context *ctx;
1603 int ret;
1604
1605 ctx = nfs4_state_find_open_context(state);
1606 if (IS_ERR(ctx))
91876b13 1607 return -EAGAIN;
539cd03a 1608 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1609 put_nfs_open_context(ctx);
1610 return ret;
1611}
1612
db4f2e63 1613static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1614{
be76b5b6
TM		 1615 switch (err) {
1616 default:
1617 printk(KERN_ERR "NFS: %s: unhandled error "
1618 "%d.\n", __func__, err);
1619 case 0:
1620 case -ENOENT:
1621 case -ESTALE:
1622 break;
1623 case -NFS4ERR_BADSESSION:
1624 case -NFS4ERR_BADSLOT:
1625 case -NFS4ERR_BAD_HIGH_SLOT:
1626 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1627 case -NFS4ERR_DEADSESSION:
1628 set_bit(NFS_DELEGATED_STATE, &state->flags);
1629 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1630 return -EAGAIN;
1631 case -NFS4ERR_STALE_CLIENTID:
1632 case -NFS4ERR_STALE_STATEID:
1633 set_bit(NFS_DELEGATED_STATE, &state->flags);
1634 case -NFS4ERR_EXPIRED:
1635 /* Don't recall a delegation if it was lost */
1636 nfs4_schedule_lease_recovery(server->nfs_client);
1637 return -EAGAIN;
352297b9
CL		 1638 case -NFS4ERR_MOVED:
1639 nfs4_schedule_migration_recovery(server);
1640 return -EAGAIN;
8ef2f8d4
CL		 1641 case -NFS4ERR_LEASE_MOVED:
1642 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1643 return -EAGAIN;
be76b5b6
TM		 1644 case -NFS4ERR_DELEG_REVOKED:
1645 case -NFS4ERR_ADMIN_REVOKED:
1646 case -NFS4ERR_BAD_STATEID:
db4f2e63 1647 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1648 nfs_inode_find_state_and_recover(state->inode,
1649 stateid);
1650 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1651 return -EAGAIN;
be76b5b6
TM		 1652 case -NFS4ERR_DELAY:
1653 case -NFS4ERR_GRACE:
1654 set_bit(NFS_DELEGATED_STATE, &state->flags);
1655 ssleep(1);
1656 return -EAGAIN;
db4f2e63
TM		 1657 case -ENOMEM:
1658 case -NFS4ERR_DENIED:
1659 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1660 return 0;
be76b5b6 1661 }
1da177e4
LT		 1662 return err;
1663}
1664
db4f2e63
TM		 1665int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1666{
1667 struct nfs_server *server = NFS_SERVER(state->inode);
1668 struct nfs4_opendata *opendata;
1669 int err;
1670
1671 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1672 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1673 if (IS_ERR(opendata))
1674 return PTR_ERR(opendata);
1675 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1676 err = nfs4_open_recover(opendata, state);
1677 nfs4_opendata_put(opendata);
1678 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1679}
1680
be05c860
CL		 1681static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1682{
1683 struct nfs4_opendata *data = calldata;
1684
cb04ad2a
PT		 1685 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1686 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1687}
1688
cdd4e68b
TM		 1689static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1690{
1691 struct nfs4_opendata *data = calldata;
1692
17ead6c8 1693 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1694
cdd4e68b 1695 data->rpc_status = task->tk_status;
26e976a8 1696 if (data->rpc_status == 0) {
f597c537 1697 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1698 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1699 renew_lease(data->o_res.server, data->timestamp);
3e309914 1700 data->rpc_done = 1;
26e976a8 1701 }
cdd4e68b
TM		 1702}
1703
1704static void nfs4_open_confirm_release(void *calldata)
1705{
1706 struct nfs4_opendata *data = calldata;
1707 struct nfs4_state *state = NULL;
1708
1709 /* If this request hasn't been cancelled, do nothing */
1710 if (data->cancelled == 0)
1711 goto out_free;
1712 /* In case of error, no cleanup! */
3e309914 1713 if (!data->rpc_done)
cdd4e68b 1714 goto out_free;
cdd4e68b 1715 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1716 if (!IS_ERR(state))
643168c2 1717 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1718out_free:
c6d00e63 1719 nfs4_opendata_put(data);
cdd4e68b
TM		 1720}
1721
1722static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1723 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1724 .rpc_call_done = nfs4_open_confirm_done,
1725 .rpc_release = nfs4_open_confirm_release,
1726};
1727
1728/*
1729 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1730 */
1731static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1732{
1733 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1734 struct rpc_task *task;
5138fde0
TM		 1735 struct rpc_message msg = {
1736 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1737 .rpc_argp = &data->c_arg,
1738 .rpc_resp = &data->c_res,
1739 .rpc_cred = data->owner->so_cred,
1740 };
c970aa85
TM		 1741 struct rpc_task_setup task_setup_data = {
1742 .rpc_client = server->client,
5138fde0 1743 .rpc_message = &msg,
c970aa85
TM		 1744 .callback_ops = &nfs4_open_confirm_ops,
1745 .callback_data = data,
101070ca 1746 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1747 .flags = RPC_TASK_ASYNC,
1748 };
1da177e4
LT		 1749 int status;
1750
17ead6c8 1751 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1752 kref_get(&data->kref);
3e309914
TM		 1753 data->rpc_done = 0;
1754 data->rpc_status = 0;
5138fde0 1755 data->timestamp = jiffies;
c970aa85 1756 task = rpc_run_task(&task_setup_data);
7a1218a2 1757 if (IS_ERR(task))
cdd4e68b 1758 return PTR_ERR(task);
cdd4e68b
TM		 1759 status = nfs4_wait_for_completion_rpc_task(task);
1760 if (status != 0) {
1761 data->cancelled = 1;
1762 smp_wmb();
1763 } else
1764 status = data->rpc_status;
e6b3c4db 1765 rpc_put_task(task);
1da177e4
LT		 1766 return status;
1767}
1768
24ac23ab 1769static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1770{
24ac23ab
TM		 1771 struct nfs4_opendata *data = calldata;
1772 struct nfs4_state_owner *sp = data->owner;
549b19cc 1773 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1774
24ac23ab 1775 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1776 goto out_wait;
aac00a8d
TM		 1777 /*
1778 * Check if we still need to send an OPEN call, or if we can use
1779 * a delegation instead.
1780 */
1781 if (data->state != NULL) {
1782 struct nfs_delegation *delegation;
1783
dc0b027d 1784 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1785 goto out_no_action;
aac00a8d
TM		 1786 rcu_read_lock();
1787 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1788 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1789 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1790 can_open_delegated(delegation, data->o_arg.fmode))
1791 goto unlock_no_action;
aac00a8d
TM		 1792 rcu_read_unlock();
1793 }
95b72eb0 1794 /* Update client id. */
549b19cc 1795 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1796 switch (data->o_arg.claim) {
1797 case NFS4_OPEN_CLAIM_PREVIOUS:
1798 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1799 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1800 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1801 case NFS4_OPEN_CLAIM_FH:
1802 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1803 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1804 }
26e976a8 1805 data->timestamp = jiffies;
035168ab 1806 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1807 &data->o_arg.seq_args,
2240a9e2
TM		 1808 &data->o_res.seq_res,
1809 task) != 0)
1810 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1811
1812 /* Set the create mode (note dependency on the session type) */
1813 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1814 if (data->o_arg.open_flags & O_EXCL) {
1815 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1816 if (nfs4_has_persistent_session(clp))
1817 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1818 else if (clp->cl_mvops->minor_version > 0)
1819 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1820 }
6ee41268 1821 return;
652f89f6
TM		 1822unlock_no_action:
1823 rcu_read_unlock();
6ee41268
TM		 1824out_no_action:
1825 task->tk_action = NULL;
c8da19b9 1826out_wait:
b75ad4cd 1827 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1828}
1829
24ac23ab
TM		 1830static void nfs4_open_done(struct rpc_task *task, void *calldata)
1831{
1832 struct nfs4_opendata *data = calldata;
1da177e4 1833
24ac23ab 1834 data->rpc_status = task->tk_status;
d898528c 1835
14516c3a
TM		 1836 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1837 return;
d898528c 1838
24ac23ab 1839 if (task->tk_status == 0) {
807d66d8
TM		 1840 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1841 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1842 case S_IFREG:
1843 break;
1844 case S_IFLNK:
24ac23ab 1845 data->rpc_status = -ELOOP;
6f926b5b
TM		 1846 break;
1847 case S_IFDIR:
24ac23ab 1848 data->rpc_status = -EISDIR;
6f926b5b
TM		 1849 break;
1850 default:
24ac23ab 1851 data->rpc_status = -ENOTDIR;
807d66d8 1852 }
6f926b5b 1853 }
26e976a8 1854 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1855 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1856 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1857 }
3e309914 1858 data->rpc_done = 1;
24ac23ab 1859}
6f926b5b 1860
24ac23ab
TM		 1861static void nfs4_open_release(void *calldata)
1862{
1863 struct nfs4_opendata *data = calldata;
1864 struct nfs4_state *state = NULL;
1865
1866 /* If this request hasn't been cancelled, do nothing */
1867 if (data->cancelled == 0)
1868 goto out_free;
1869 /* In case of error, no cleanup! */
3e309914 1870 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1871 goto out_free;
1872 /* In case we need an open_confirm, no cleanup! */
1873 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1874 goto out_free;
24ac23ab 1875 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1876 if (!IS_ERR(state))
643168c2 1877 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1878out_free:
c6d00e63 1879 nfs4_opendata_put(data);
24ac23ab
TM		 1880}
1881
1882static const struct rpc_call_ops nfs4_open_ops = {
1883 .rpc_call_prepare = nfs4_open_prepare,
1884 .rpc_call_done = nfs4_open_done,
1885 .rpc_release = nfs4_open_release,
1886};
1887
b257957e 1888static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1889{
1890 struct inode *dir = data->dir->d_inode;
1891 struct nfs_server *server = NFS_SERVER(dir);
1892 struct nfs_openargs *o_arg = &data->o_arg;
1893 struct nfs_openres *o_res = &data->o_res;
1894 struct rpc_task *task;
5138fde0
TM		 1895 struct rpc_message msg = {
1896 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1897 .rpc_argp = o_arg,
1898 .rpc_resp = o_res,
1899 .rpc_cred = data->owner->so_cred,
1900 };
c970aa85
TM		 1901 struct rpc_task_setup task_setup_data = {
1902 .rpc_client = server->client,
5138fde0 1903 .rpc_message = &msg,
c970aa85
TM		 1904 .callback_ops = &nfs4_open_ops,
1905 .callback_data = data,
101070ca 1906 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1907 .flags = RPC_TASK_ASYNC,
1908 };
24ac23ab
TM		 1909 int status;
1910
a9c92d6b 1911 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1912 kref_get(&data->kref);
3e309914
TM		 1913 data->rpc_done = 0;
1914 data->rpc_status = 0;
2ced46c2 1915 data->cancelled = 0;
bdeca1b7
TM		 1916 data->is_recover = 0;
1917 if (isrecover) {
8fe72bac 1918 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1919 data->is_recover = 1;
1920 }
c970aa85 1921 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1922 if (IS_ERR(task))
1923 return PTR_ERR(task);
1924 status = nfs4_wait_for_completion_rpc_task(task);
1925 if (status != 0) {
1926 data->cancelled = 1;
1927 smp_wmb();
1928 } else
1929 status = data->rpc_status;
1930 rpc_put_task(task);
1931
1932 return status;
1933}
1934
1935static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1936{
1937 struct inode *dir = data->dir->d_inode;
1938 struct nfs_openres *o_res = &data->o_res;
1939 int status;
1940
1941 status = nfs4_run_open_task(data, 1);
1942 if (status != 0 || !data->rpc_done)
1943 return status;
1944
6926afd1
TM		 1945 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1946
b257957e
AB		 1947 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1948 status = _nfs4_proc_open_confirm(data);
1949 if (status != 0)
1950 return status;
1951 }
1952
1953 return status;
1954}
1955
f3792d63
TM		 1956/*
1957 * Additional permission checks in order to distinguish between an
1958 * open for read, and an open for execute. This works around the
1959 * fact that NFSv4 OPEN treats read and execute permissions as being
1960 * the same.
1961 * Note that in the non-execute case, we want to turn off permission
1962 * checking if we just created a new file (POSIX open() semantics).
1963 */
6168f62c
WAA		 1964static int nfs4_opendata_access(struct rpc_cred *cred,
1965 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1966 struct nfs4_state *state, fmode_t fmode,
1967 int openflags)
6168f62c
WAA		 1968{
1969 struct nfs_access_entry cache;
1970 u32 mask;
1971
1972 /* access call failed or for some reason the server doesn't
1973 * support any access modes -- defer access call until later */
1974 if (opendata->o_res.access_supported == 0)
1975 return 0;
1976
1977 mask = 0;
f3792d63
TM		 1978 /*
1979 * Use openflags to check for exec, because fmode won't
1980 * always have FMODE_EXEC set when file open for exec.
1981 */
f8d9a897
WAA		 1982 if (openflags & __FMODE_EXEC) {
1983 /* ONLY check for exec rights */
1984 mask = MAY_EXEC;
f3792d63 1985 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 1986 mask = MAY_READ;
6168f62c
WAA		 1987
1988 cache.cred = cred;
1989 cache.jiffies = jiffies;
1990 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1991 nfs_access_add_cache(state->inode, &cache);
1992
bbd3a8ee 1993 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1994 return 0;
1995
1996 /* even though OPEN succeeded, access is denied. Close the file */
1997 nfs4_close_state(state, fmode);
998f40b5 1998 return -EACCES;
6168f62c
WAA		 1999}
2000
b257957e
AB		 2001/*
2002 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2003 */
2004static int _nfs4_proc_open(struct nfs4_opendata *data)
2005{
2006 struct inode *dir = data->dir->d_inode;
2007 struct nfs_server *server = NFS_SERVER(dir);
2008 struct nfs_openargs *o_arg = &data->o_arg;
2009 struct nfs_openres *o_res = &data->o_res;
2010 int status;
2011
2012 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2013 if (!data->rpc_done)
2014 return status;
2015 if (status != 0) {
2016 if (status == -NFS4ERR_BADNAME &&
2017 !(o_arg->open_flags & O_CREAT))
2018 return -ENOENT;
24ac23ab 2019 return status;
08ef7bd3 2020 }
24ac23ab 2021
6926afd1
TM		 2022 nfs_fattr_map_and_free_names(server, &data->f_attr);
2023
5bc2afc2 2024 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2025 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2026 if (o_arg->open_flags & O_EXCL)
2027 data->file_created = 1;
2028 else if (o_res->cinfo.before != o_res->cinfo.after)
2029 data->file_created = 1;
2030 }
0df5dd4a
TM		 2031 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2032 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2033 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2034 status = _nfs4_proc_open_confirm(data);
1da177e4 2035 if (status != 0)
24ac23ab 2036 return status;
1da177e4
LT		 2037 }
2038 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2039 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2040 return 0;
1da177e4
LT		 2041}
2042
d83217c1
AA		 2043static int nfs4_recover_expired_lease(struct nfs_server *server)
2044{
2045 return nfs4_client_recover_expired_lease(server->nfs_client);
2046}
2047
1da177e4
LT		 2048/*
2049 * OPEN_EXPIRED:
2050 * reclaim state on the server after a network partition.
2051 * Assumes caller holds the appropriate lock
2052 */
539cd03a 2053static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2054{
e56e0b78 2055 struct nfs4_opendata *opendata;
864472e9 2056 int ret;
1da177e4 2057
4a1c0893 2058 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2059 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2060 if (IS_ERR(opendata))
2061 return PTR_ERR(opendata);
864472e9 2062 ret = nfs4_open_recover(opendata, state);
35d05778 2063 if (ret == -ESTALE)
3d4ff43d 2064 d_drop(ctx->dentry);
c6d00e63 2065 nfs4_opendata_put(opendata);
864472e9 2066 return ret;
1da177e4
LT		 2067}
2068
a9ed2e25 2069static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2070{
539cd03a 2071 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2072 struct nfs4_exception exception = { };
2073 int err;
2074
2075 do {
539cd03a 2076 err = _nfs4_open_expired(ctx, state);
42113a75 2077 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2078 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2079 continue;
a9ed2e25
TM		 2080 switch (err) {
2081 default:
2082 goto out;
2083 case -NFS4ERR_GRACE:
2084 case -NFS4ERR_DELAY:
2085 nfs4_handle_exception(server, err, &exception);
2086 err = 0;
2087 }
202b50dc 2088 } while (exception.retry);
a9ed2e25 2089out:
202b50dc
TM		 2090 return err;
2091}
2092
1da177e4
LT		 2093static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2094{
1da177e4 2095 struct nfs_open_context *ctx;
864472e9 2096 int ret;
1da177e4 2097
864472e9
TM		 2098 ctx = nfs4_state_find_open_context(state);
2099 if (IS_ERR(ctx))
91876b13 2100 return -EAGAIN;
539cd03a 2101 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2102 put_nfs_open_context(ctx);
2103 return ret;
1da177e4
LT		 2104}
2105
4dfd4f7a
TM		 2106static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2107{
2108 nfs_remove_bad_delegation(state->inode);
2109 write_seqlock(&state->seqlock);
2110 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2111 write_sequnlock(&state->seqlock);
2112 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2113}
2114
2115static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2116{
2117 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2118 nfs_finish_clear_delegation_stateid(state);
2119}
2120
2121static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2122{
2123 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2124 nfs40_clear_delegation_stateid(state);
2125 return nfs4_open_expired(sp, state);
2126}
2127
f062eb6c 2128#if defined(CONFIG_NFS_V4_1)
0c116cad 2129static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2130{
f062eb6c 2131 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2132 nfs4_stateid stateid;
ab7cb0df 2133 struct nfs_delegation *delegation;
0c116cad
TM		 2134 struct rpc_cred *cred;
2135 int status;
3e60ffdd 2136
ab7cb0df
TM		 2137 /* Get the delegation credential for use by test/free_stateid */
2138 rcu_read_lock();
2139 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2140 if (delegation == NULL) {
ab7cb0df 2141 rcu_read_unlock();
0c116cad
TM		 2142 return;
2143 }
2144
2145 nfs4_stateid_copy(&stateid, &delegation->stateid);
2146 cred = get_rpccred(delegation->cred);
2147 rcu_read_unlock();
2148 status = nfs41_test_stateid(server, &stateid, cred);
2149 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2150
3e60ffdd
CL		 2151 if (status != NFS_OK) {
2152 /* Free the stateid unless the server explicitly
2153 * informs us the stateid is unrecognized. */
2154 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2155 nfs41_free_stateid(server, &stateid, cred);
2156 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2157 }
ab7cb0df 2158
0c116cad 2159 put_rpccred(cred);
3e60ffdd
CL		 2160}
2161
2162/**
2163 * nfs41_check_open_stateid - possibly free an open stateid
2164 *
2165 * @state: NFSv4 state for an inode
2166 *
2167 * Returns NFS_OK if recovery for this stateid is now finished.
2168 * Otherwise a negative NFS4ERR value is returned.
2169 */
2170static int nfs41_check_open_stateid(struct nfs4_state *state)
2171{
2172 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2173 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2174 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2175 int status;
2176
2177 /* If a state reset has been done, test_stateid is unneeded */
2178 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2179 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2180 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2181 return -NFS4ERR_BAD_STATEID;
2182
ab7cb0df 2183 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2184 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2185 if (status != NFS_OK) {
2186 /* Free the stateid unless the server explicitly
2187 * informs us the stateid is unrecognized. */
2188 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2189 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2190
2191 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2192 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2193 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2194 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2195 }
2196 return status;
2197}
2198
2199static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2200{
eb64cf96 2201 int status;
b01dd1d8 2202
0c116cad 2203 nfs41_check_delegation_stateid(state);
3e60ffdd 2204 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2205 if (status != NFS_OK)
2206 status = nfs4_open_expired(sp, state);
2207 return status;
f062eb6c
BS		 2208}
2209#endif
2210
aa53ed54
JL		 2211/*
2212 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2213 * fields corresponding to attributes that were used to store the verifier.
2214 * Make sure we clobber those fields in the later setattr call
2215 */
2216static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2217{
2218 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2219 !(sattr->ia_valid & ATTR_ATIME_SET))
2220 sattr->ia_valid |= ATTR_ATIME;
2221
2222 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2223 !(sattr->ia_valid & ATTR_MTIME_SET))
2224 sattr->ia_valid |= ATTR_MTIME;
2225}
2226
c21443c2
TM		 2227static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2228 fmode_t fmode,
2229 int flags,
3efb9722 2230 struct nfs_open_context *ctx)
c21443c2
TM		 2231{
2232 struct nfs4_state_owner *sp = opendata->owner;
2233 struct nfs_server *server = sp->so_server;
275bb307 2234 struct dentry *dentry;
c21443c2
TM		 2235 struct nfs4_state *state;
2236 unsigned int seq;
2237 int ret;
2238
2239 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2240
2241 ret = _nfs4_proc_open(opendata);
dca78001 2242 if (ret != 0)
c21443c2
TM		 2243 goto out;
2244
2245 state = nfs4_opendata_to_nfs4_state(opendata);
2246 ret = PTR_ERR(state);
2247 if (IS_ERR(state))
2248 goto out;
2249 if (server->caps & NFS_CAP_POSIX_LOCK)
2250 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2251
275bb307
TM		 2252 dentry = opendata->dentry;
2253 if (dentry->d_inode == NULL) {
2254 /* FIXME: Is this d_drop() ever needed? */
2255 d_drop(dentry);
2256 dentry = d_add_unique(dentry, igrab(state->inode));
2257 if (dentry == NULL) {
2258 dentry = opendata->dentry;
2259 } else if (dentry != ctx->dentry) {
2260 dput(ctx->dentry);
2261 ctx->dentry = dget(dentry);
2262 }
2263 nfs_set_verifier(dentry,
2264 nfs_save_change_attribute(opendata->dir->d_inode));
2265 }
2266
c21443c2
TM		 2267 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2268 if (ret != 0)
2269 goto out;
2270
3efb9722 2271 ctx->state = state;
c45ffdd2
TM		 2272 if (dentry->d_inode == state->inode) {
2273 nfs_inode_attach_open_context(ctx);
2274 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2275 nfs4_schedule_stateid_recovery(server, state);
2276 }
c21443c2
TM		 2277out:
2278 return ret;
2279}
2280
1da177e4 2281/*
24ac23ab 2282 * Returns a referenced nfs4_state
1da177e4 2283 */
82be417a 2284static int _nfs4_do_open(struct inode *dir,
4197a055 2285 struct nfs_open_context *ctx,
82be417a
AA		 2286 int flags,
2287 struct iattr *sattr,
5bc2afc2
TM		 2288 struct nfs4_label *label,
2289 int *opened)
1da177e4
LT		 2290{
2291 struct nfs4_state_owner *sp;
2292 struct nfs4_state *state = NULL;
2293 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2294 struct nfs4_opendata *opendata;
4197a055
TM		 2295 struct dentry *dentry = ctx->dentry;
2296 struct rpc_cred *cred = ctx->cred;
2297 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2298 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2299 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2300 struct nfs4_label *olabel = NULL;
aac00a8d 2301 int status;
1da177e4
LT		 2302
2303 /* Protect against reboot recovery conflicts */
1da177e4 2304 status = -ENOMEM;
d1e284d5
TM		 2305 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2306 if (sp == NULL) {
1da177e4
LT		 2307 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2308 goto out_err;
2309 }
58d9714a
TM		 2310 status = nfs4_recover_expired_lease(server);
2311 if (status != 0)
b4454fe1 2312 goto err_put_state_owner;
82a2c1b7
AV		 2313 if (dentry->d_inode != NULL)
2314 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2315 status = -ENOMEM;
49f9a0fa
TM		 2316 if (dentry->d_inode)
2317 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2318 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2319 label, claim, GFP_KERNEL);
e56e0b78 2320 if (opendata == NULL)
95d35cb4 2321 goto err_put_state_owner;
1da177e4 2322
14c43f76
DQ		 2323 if (label) {
2324 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2325 if (IS_ERR(olabel)) {
2326 status = PTR_ERR(olabel);
2327 goto err_opendata_put;
2328 }
2329 }
2330
e911b815
TM		 2331 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2332 if (!opendata->f_attr.mdsthreshold) {
2333 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2334 if (!opendata->f_attr.mdsthreshold)
2335 goto err_free_label;
2336 }
1549210f 2337 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2338 }
82a2c1b7
AV		 2339 if (dentry->d_inode != NULL)
2340 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2341
3efb9722 2342 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2343 if (status != 0)
14c43f76 2344 goto err_free_label;
3efb9722 2345 state = ctx->state;
6168f62c 2346
549b19cc
TM		 2347 if ((opendata->o_arg.open_flags & O_EXCL) &&
2348 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2349 nfs4_exclusive_attrset(opendata, sattr);
2350
2351 nfs_fattr_init(opendata->o_res.f_attr);
2352 status = nfs4_do_setattr(state->inode, cred,
2353 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2354 state, label, olabel);
2355 if (status == 0) {
0ab64e0e 2356 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2357 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2358 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2359 }
0ab64e0e 2360 }
5bc2afc2
TM		 2361 if (opendata->file_created)
2362 *opened |= FILE_CREATED;
82be417a 2363
e911b815 2364 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2365 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2366 opendata->f_attr.mdsthreshold = NULL;
2367 }
82be417a 2368
14c43f76
DQ		 2369 nfs4_label_free(olabel);
2370
c6d00e63 2371 nfs4_opendata_put(opendata);
1da177e4 2372 nfs4_put_state_owner(sp);
1da177e4 2373 return 0;
14c43f76
DQ		 2374err_free_label:
2375 nfs4_label_free(olabel);
c6d00e63
TM		 2376err_opendata_put:
2377 nfs4_opendata_put(opendata);
e56e0b78
TM		 2378err_put_state_owner:
2379 nfs4_put_state_owner(sp);
1da177e4 2380out_err:
1da177e4
LT		 2381 return status;
2382}
2383
2384
82be417a 2385static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2386 struct nfs_open_context *ctx,
82be417a
AA		 2387 int flags,
2388 struct iattr *sattr,
5bc2afc2
TM		 2389 struct nfs4_label *label,
2390 int *opened)
1da177e4 2391{
49f9a0fa 2392 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2393 struct nfs4_exception exception = { };
2394 struct nfs4_state *res;
2395 int status;
2396
2397 do {
5bc2afc2 2398 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2399 res = ctx->state;
42113a75 2400 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2401 if (status == 0)
2402 break;
2403 /* NOTE: BAD_SEQID means the server and client disagree about the
2404 * book-keeping w.r.t. state-changing operations
2405 * (OPEN/CLOSE/LOCK/LOCKU...)
2406 * It is actually a sign of a bug on the client or on the server.
2407 *
2408 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2409 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2410 * have unhashed the old state_owner for us, and that we can
2411 * therefore safely retry using a new one. We should still warn
2412 * the user though...
2413 */
2414 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2415 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2416 " returned a bad sequence-id error!\n",
2417 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2418 exception.retry = 1;
2419 continue;
2420 }
550f5747
TM		 2421 /*
2422 * BAD_STATEID on OPEN means that the server cancelled our
2423 * state before it received the OPEN_CONFIRM.
2424 * Recover by retrying the request as per the discussion
2425 * on Page 181 of RFC3530.
2426 */
2427 if (status == -NFS4ERR_BAD_STATEID) {
2428 exception.retry = 1;
2429 continue;
2430 }
aac00a8d
TM		 2431 if (status == -EAGAIN) {
2432 /* We must have found a delegation */
2433 exception.retry = 1;
2434 continue;
2435 }
49f9a0fa
TM		 2436 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2437 continue;
2438 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2439 status, &exception));
2440 } while (exception.retry);
2441 return res;
2442}
2443
659bfcd6
TM		 2444static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2445 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2446 struct nfs4_state *state, struct nfs4_label *ilabel,
2447 struct nfs4_label *olabel)
1da177e4 2448{
3e4f6290 2449 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2450 struct nfs_setattrargs arg = {
3e4f6290 2451 .fh = NFS_FH(inode),
1da177e4
LT		 2452 .iap = sattr,
2453 .server = server,
2454 .bitmask = server->attr_bitmask,
1775fd3e 2455 .label = ilabel,
1da177e4
LT		 2456 };
2457 struct nfs_setattrres res = {
2458 .fattr = fattr,
1775fd3e 2459 .label = olabel,
1da177e4
LT		 2460 .server = server,
2461 };
2462 struct rpc_message msg = {
659bfcd6
TM		 2463 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2464 .rpc_argp = &arg,
2465 .rpc_resp = &res,
2466 .rpc_cred = cred,
1da177e4 2467 };
26e976a8 2468 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2469 fmode_t fmode;
2470 bool truncate;
65e4308d 2471 int status;
1da177e4 2472
aa9c2669
DQ		 2473 arg.bitmask = nfs4_bitmask(server, ilabel);
2474 if (ilabel)
2475 arg.bitmask = nfs4_bitmask(server, olabel);
2476
0e574af1 2477 nfs_fattr_init(fattr);
1da177e4 2478
ee3ae84e
TM		 2479 /* Servers should only apply open mode checks for file size changes */
2480 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2481 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2482
2483 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2484 /* Use that stateid */
0418dae1 2485 } else if (truncate && state != NULL) {
2a369153
TM		 2486 struct nfs_lockowner lockowner = {
2487 .l_owner = current->files,
2488 .l_pid = current->tgid,
2489 };
0418dae1
TM		 2490 if (!nfs4_valid_open_stateid(state))
2491 return -EBADF;
2492 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2493 &lockowner) == -EIO)
2494 return -EBADF;
08e9eac4 2495 } else
f597c537 2496 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2497
7c513058 2498 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2499 if (status == 0 && state != NULL)
2500 renew_lease(server, timestamp);
65e4308d 2501 return status;
1da177e4
LT		 2502}
2503
659bfcd6
TM		 2504static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2505 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2506 struct nfs4_state *state, struct nfs4_label *ilabel,
2507 struct nfs4_label *olabel)
1da177e4 2508{
3e4f6290 2509 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2510 struct nfs4_exception exception = {
2511 .state = state,
3114ea7a 2512 .inode = inode,
a1d0b5ee 2513 };
1da177e4
LT		 2514 int err;
2515 do {
1775fd3e 2516 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2517 trace_nfs4_setattr(inode, err);
451146be
TM		 2518 switch (err) {
2519 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2520 if (!(sattr->ia_valid & ATTR_SIZE)) {
2521 pr_warn_once("NFSv4: server %s is incorrectly "
2522 "applying open mode checks to "
2523 "a SETATTR that is not "
2524 "changing file size.\n",
2525 server->nfs_client->cl_hostname);
2526 }
451146be
TM		 2527 if (state && !(state->state & FMODE_WRITE)) {
2528 err = -EBADF;
2529 if (sattr->ia_valid & ATTR_OPEN)
2530 err = -EACCES;
2531 goto out;
2532 }
2533 }
2534 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2535 } while (exception.retry);
451146be 2536out:
1da177e4
LT		 2537 return err;
2538}
2539
2540struct nfs4_closedata {
2541 struct inode *inode;
2542 struct nfs4_state *state;
2543 struct nfs_closeargs arg;
2544 struct nfs_closeres res;
516a6af6 2545 struct nfs_fattr fattr;
26e976a8 2546 unsigned long timestamp;
f7e8917a
FI		 2547 bool roc;
2548 u32 roc_barrier;
1da177e4
LT		 2549};
2550
963d8fe5 2551static void nfs4_free_closedata(void *data)
9512135d 2552{
963d8fe5
TM		 2553 struct nfs4_closedata *calldata = data;
2554 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2555 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2556
f7e8917a
FI		 2557 if (calldata->roc)
2558 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2559 nfs4_put_open_state(calldata->state);
2560 nfs_free_seqid(calldata->arg.seqid);
9512135d 2561 nfs4_put_state_owner(sp);
322b2b90 2562 nfs_sb_deactive(sb);
9512135d
TM		 2563 kfree(calldata);
2564}
2565
963d8fe5 2566static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2567{
963d8fe5 2568 struct nfs4_closedata *calldata = data;
1da177e4 2569 struct nfs4_state *state = calldata->state;
1da177e4 2570 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2571 nfs4_stateid *res_stateid = NULL;
1da177e4 2572
a3ca5651 2573 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2574 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2575 return;
42113a75 2576 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2577 /* hmm. we are done with the inode, and in the process of freeing
2578 * the state_owner. we keep this around to process errors
2579 */
1da177e4
LT		 2580 switch (task->tk_status) {
2581 case 0:
412f6c4c
TM		 2582 res_stateid = &calldata->res.stateid;
2583 if (calldata->arg.fmode == 0 && calldata->roc)
f7e8917a
FI		 2584 pnfs_roc_set_barrier(state->inode,
2585 calldata->roc_barrier);
26e976a8 2586 renew_lease(server, calldata->timestamp);
412f6c4c 2587 break;
69794ad7 2588 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2589 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2590 case -NFS4ERR_OLD_STATEID:
2591 case -NFS4ERR_BAD_STATEID:
1da177e4 2592 case -NFS4ERR_EXPIRED:
dc0b027d 2593 if (calldata->arg.fmode == 0)
9e33bed5 2594 break;
1da177e4 2595 default:
8478eaa1 2596 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2597 rpc_restart_call_prepare(task);
69794ad7
TM		 2598 goto out_release;
2599 }
1da177e4 2600 }
412f6c4c 2601 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
69794ad7 2602out_release:
72211dbe 2603 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2604 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2605 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2606}
2607
4ce70ada 2608static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2609{
4ce70ada 2610 struct nfs4_closedata *calldata = data;
9512135d 2611 struct nfs4_state *state = calldata->state;
7fdab069 2612 struct inode *inode = calldata->inode;
aee7af35 2613 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2614 int call_close = 0;
9512135d 2615
a3ca5651 2616 dprintk("%s: begin!\n", __func__);
963d8fe5 2617 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2618 goto out_wait;
003707c7 2619
88069f77 2620 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2621 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2622 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2623 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2624 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
003707c7 2625 /* Calculate the change in open mode */
cd9288ff 2626 calldata->arg.fmode = 0;
e7616923 2627 if (state->n_rdwr == 0) {
cd9288ff
TM		 2628 if (state->n_rdonly == 0)
2629 call_close |= is_rdonly;
2630 else if (is_rdonly)
2631 calldata->arg.fmode |= FMODE_READ;
2632 if (state->n_wronly == 0)
2633 call_close |= is_wronly;
2634 else if (is_wronly)
2635 calldata->arg.fmode |= FMODE_WRITE;
2636 } else if (is_rdwr)
2637 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2638
2639 if (calldata->arg.fmode == 0)
2640 call_close |= is_rdwr;
2641
5d422301
TM		 2642 if (!nfs4_valid_open_stateid(state))
2643 call_close = 0;
4cecb76f 2644 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2645
2646 if (!call_close) {
963d8fe5 2647 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2648 goto out_no_action;
9512135d 2649 }
88069f77 2650
f7e8917a 2651 if (calldata->arg.fmode == 0) {
88069f77 2652 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2653 if (calldata->roc &&
b9536ad5
AA		 2654 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2655 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2656 goto out_wait;
b9536ad5 2657 }
f7e8917a 2658 }
88069f77 2659
516a6af6 2660 nfs_fattr_init(calldata->res.fattr);
26e976a8 2661 calldata->timestamp = jiffies;
7fdab069 2662 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2663 &calldata->arg.seq_args,
2664 &calldata->res.seq_res,
2240a9e2
TM		 2665 task) != 0)
2666 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2667 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2668 return;
2669out_no_action:
2670 task->tk_action = NULL;
2671out_wait:
2672 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2673}
2674
963d8fe5 2675static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2676 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2677 .rpc_call_done = nfs4_close_done,
2678 .rpc_release = nfs4_free_closedata,
2679};
2680
fe08c546
PT		 2681static bool nfs4_state_has_opener(struct nfs4_state *state)
2682{
2683 /* first check existing openers */
2684 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 &&
2685 state->n_rdonly != 0)
2686 return true;
2687
2688 if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 &&
2689 state->n_wronly != 0)
2690 return true;
2691
2692 if (test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 &&
2693 state->n_rdwr != 0)
2694 return true;
2695
2696 return false;
2697}
2698
2699static bool nfs4_roc(struct inode *inode)
2700{
2701 struct nfs_inode *nfsi = NFS_I(inode);
2702 struct nfs_open_context *ctx;
2703 struct nfs4_state *state;
2704
2705 spin_lock(&inode->i_lock);
2706 list_for_each_entry(ctx, &nfsi->open_files, list) {
2707 state = ctx->state;
2708 if (state == NULL)
2709 continue;
2710 if (nfs4_state_has_opener(state)) {
2711 spin_unlock(&inode->i_lock);
2712 return false;
2713 }
2714 }
2715 spin_unlock(&inode->i_lock);
2716
2717 if (nfs4_check_delegation(inode, FMODE_READ))
2718 return false;
2719
2720 return pnfs_roc(inode);
2721}
2722
1da177e4
LT		 2723/*
2724 * It is possible for data to be read/written from a mem-mapped file
2725 * after the sys_close call (which hits the vfs layer as a flush).
2726 * This means that we can't safely call nfsv4 close on a file until
2727 * the inode is cleared. This in turn means that we are not good
2728 * NFSv4 citizens - we do not indicate to the server to update the file's
2729 * share state even when we are done with one of the three share
2730 * stateid's in the inode.
2731 *
2732 * NOTE: Caller must be holding the sp->so_owner semaphore!
2733 */
1f7977c1 2734int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2735{
4a35bd41 2736 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2737 struct nfs4_closedata *calldata;
b39e625b
TM		 2738 struct nfs4_state_owner *sp = state->owner;
2739 struct rpc_task *task;
5138fde0
TM		 2740 struct rpc_message msg = {
2741 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2742 .rpc_cred = state->owner->so_cred,
2743 };
c970aa85
TM		 2744 struct rpc_task_setup task_setup_data = {
2745 .rpc_client = server->client,
5138fde0 2746 .rpc_message = &msg,
c970aa85 2747 .callback_ops = &nfs4_close_ops,
101070ca 2748 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2749 .flags = RPC_TASK_ASYNC,
2750 };
9512135d 2751 int status = -ENOMEM;
1da177e4 2752
fa940720
WAA		 2753 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2754 &task_setup_data.rpc_client, &msg);
2755
8535b2be 2756 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2757 if (calldata == NULL)
9512135d 2758 goto out;
a9c92d6b 2759 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2760 calldata->inode = state->inode;
1da177e4 2761 calldata->state = state;
4a35bd41 2762 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2763 calldata->arg.stateid = &state->open_stateid;
1da177e4 2764 /* Serialization for the sequence id */
8535b2be 2765 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2766 if (calldata->arg.seqid == NULL)
2767 goto out_free_calldata;
dc0b027d 2768 calldata->arg.fmode = 0;
a65318bf 2769 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2770 calldata->res.fattr = &calldata->fattr;
c1d51931 2771 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2772 calldata->res.server = server;
fe08c546 2773 calldata->roc = nfs4_roc(state->inode);
643168c2 2774 nfs_sb_active(calldata->inode->i_sb);
9512135d 2775
1174dd1f
TM		 2776 msg.rpc_argp = &calldata->arg;
2777 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2778 task_setup_data.callback_data = calldata;
2779 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2780 if (IS_ERR(task))
2781 return PTR_ERR(task);
a49c3c77
TM		 2782 status = 0;
2783 if (wait)
2784 status = rpc_wait_for_completion_task(task);
b39e625b 2785 rpc_put_task(task);
a49c3c77 2786 return status;
9512135d
TM		 2787out_free_calldata:
2788 kfree(calldata);
2789out:
b39e625b
TM		 2790 nfs4_put_open_state(state);
2791 nfs4_put_state_owner(sp);
9512135d 2792 return status;
1da177e4
LT		 2793}
2794
2b484297 2795static struct inode *
5bc2afc2
TM		 2796nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2797 int open_flags, struct iattr *attr, int *opened)
1da177e4 2798{
1da177e4 2799 struct nfs4_state *state;
aa9c2669
DQ		 2800 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2801
2802 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2803
565277f6 2804 /* Protect against concurrent sillydeletes */
5bc2afc2 2805 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2806
2807 nfs4_label_release_security(label);
2808
f46e0bd3
TM		 2809 if (IS_ERR(state))
2810 return ERR_CAST(state);
275bb307 2811 return state->inode;
1da177e4
LT		 2812}
2813
1185a552 2814static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2815{
2816 if (ctx->state == NULL)
2817 return;
2818 if (is_sync)
643168c2 2819 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2820 else
643168c2 2821 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2822}
1da177e4 2823
b944dba3
TM		 2824#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2825#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2826#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2827
1da177e4
LT		 2828static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2829{
43652ad5
BH		 2830 struct nfs4_server_caps_arg args = {
2831 .fhandle = fhandle,
2832 };
1da177e4
LT		 2833 struct nfs4_server_caps_res res = {};
2834 struct rpc_message msg = {
2835 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2836 .rpc_argp = &args,
1da177e4
LT		 2837 .rpc_resp = &res,
2838 };
2839 int status;
2840
7c513058 2841 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2842 if (status == 0) {
b944dba3
TM		 2843 /* Sanity check the server answers */
2844 switch (server->nfs_client->cl_minorversion) {
2845 case 0:
2846 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2847 res.attr_bitmask[2] = 0;
2848 break;
2849 case 1:
2850 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2851 break;
2852 case 2:
2853 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2854 }
1da177e4 2855 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2856 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2857 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2858 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2859 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2860 NFS_CAP_CTIME|NFS_CAP_MTIME|
2861 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2862 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2863 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2864 server->caps |= NFS_CAP_ACLS;
2865 if (res.has_links != 0)
2866 server->caps |= NFS_CAP_HARDLINKS;
2867 if (res.has_symlinks != 0)
2868 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2869 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2870 server->caps |= NFS_CAP_FILEID;
2871 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2872 server->caps |= NFS_CAP_MODE;
2873 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2874 server->caps |= NFS_CAP_NLINK;
2875 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2876 server->caps |= NFS_CAP_OWNER;
2877 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2878 server->caps |= NFS_CAP_OWNER_GROUP;
2879 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2880 server->caps |= NFS_CAP_ATIME;
2881 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2882 server->caps |= NFS_CAP_CTIME;
2883 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2884 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2885#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2886 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2887 server->caps |= NFS_CAP_SECURITY_LABEL;
2888#endif
2889 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2890 sizeof(server->attr_bitmask));
b944dba3 2891 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2892
a65318bf
TM		 2893 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2894 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2895 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2896 server->cache_consistency_bitmask[2] = 0;
1da177e4 2897 server->acl_bitmask = res.acl_bitmask;
264e6351 2898 server->fh_expire_type = res.fh_expire_type;
1da177e4 2899 }
cccef3b9 2900
1da177e4
LT		 2901 return status;
2902}
2903
55a97593 2904int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2905{
2906 struct nfs4_exception exception = { };
2907 int err;
2908 do {
2909 err = nfs4_handle_exception(server,
2910 _nfs4_server_capabilities(server, fhandle),
2911 &exception);
2912 } while (exception.retry);
2913 return err;
2914}
2915
2916static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2917 struct nfs_fsinfo *info)
2918{
aa9c2669 2919 u32 bitmask[3];
1da177e4 2920 struct nfs4_lookup_root_arg args = {
aa9c2669 2921 .bitmask = bitmask,
1da177e4
LT		 2922 };
2923 struct nfs4_lookup_res res = {
2924 .server = server,
0e574af1 2925 .fattr = info->fattr,
1da177e4
LT		 2926 .fh = fhandle,
2927 };
2928 struct rpc_message msg = {
2929 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2930 .rpc_argp = &args,
2931 .rpc_resp = &res,
2932 };
008f55d0 2933
aa9c2669
DQ		 2934 bitmask[0] = nfs4_fattr_bitmap[0];
2935 bitmask[1] = nfs4_fattr_bitmap[1];
2936 /*
2937 * Process the label in the upcoming getfattr
2938 */
2939 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2940
0e574af1 2941 nfs_fattr_init(info->fattr);
7c513058 2942 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2943}
2944
2945static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2946 struct nfs_fsinfo *info)
2947{
2948 struct nfs4_exception exception = { };
2949 int err;
2950 do {
fb8a5ba8 2951 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2952 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2953 switch (err) {
2954 case 0:
2955 case -NFS4ERR_WRONGSEC:
05e9cfb4 2956 goto out;
fb8a5ba8
BS		 2957 default:
2958 err = nfs4_handle_exception(server, err, &exception);
2959 }
1da177e4 2960 } while (exception.retry);
05e9cfb4 2961out:
1da177e4
LT		 2962 return err;
2963}
2964
8f70e95f
BS		 2965static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2966 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2967{
c2190661
TM		 2968 struct rpc_auth_create_args auth_args = {
2969 .pseudoflavor = flavor,
2970 };
8f70e95f
BS		 2971 struct rpc_auth *auth;
2972 int ret;
2973
c2190661 2974 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 2975 if (IS_ERR(auth)) {
75bc8821 2976 ret = -EACCES;
8f70e95f
BS		 2977 goto out;
2978 }
2979 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2980out:
2981 return ret;
2982}
2983
9a744ba3
CL		 2984/*
2985 * Retry pseudoroot lookup with various security flavors. We do this when:
2986 *
2987 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2988 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2989 *
2990 * Returns zero on success, or a negative NFS4ERR value, or a
2991 * negative errno value.
2992 */
801a16dc 2993static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2994 struct nfs_fsinfo *info)
1da177e4 2995{
9a744ba3
CL		 2996 /* Per 3530bis 15.33.5 */
2997 static const rpc_authflavor_t flav_array[] = {
2998 RPC_AUTH_GSS_KRB5P,
2999 RPC_AUTH_GSS_KRB5I,
3000 RPC_AUTH_GSS_KRB5,
c4eafe11 3001 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3002 RPC_AUTH_NULL,
3003 };
3004 int status = -EPERM;
3005 size_t i;
6a1a1e34 3006
4d4b69dd
WAA		 3007 if (server->auth_info.flavor_len > 0) {
3008 /* try each flavor specified by user */
3009 for (i = 0; i < server->auth_info.flavor_len; i++) {
3010 status = nfs4_lookup_root_sec(server, fhandle, info,
3011 server->auth_info.flavors[i]);
3012 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3013 continue;
3014 break;
3015 }
3016 } else {
3017 /* no flavors specified by user, try default list */
3018 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3019 status = nfs4_lookup_root_sec(server, fhandle, info,
3020 flav_array[i]);
3021 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3022 continue;
3023 break;
3024 }
8f70e95f 3025 }
9a744ba3 3026
fb8a5ba8
BS		 3027 /*
3028 * -EACCESS could mean that the user doesn't have correct permissions
3029 * to access the mount. It could also mean that we tried to mount
3030 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3031 * existing mount programs don't handle -EACCES very well so it should
3032 * be mapped to -EPERM instead.
3033 */
3034 if (status == -EACCES)
3035 status = -EPERM;
801a16dc
BS		 3036 return status;
3037}
3038
2ed4b95b
CL		 3039static int nfs4_do_find_root_sec(struct nfs_server *server,
3040 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3041{
3042 int mv = server->nfs_client->cl_minorversion;
3043 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3044}
3045
3046/**
3047 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3048 * @server: initialized nfs_server handle
3049 * @fhandle: we fill in the pseudo-fs root file handle
3050 * @info: we fill in an FSINFO struct
5e6b1990 3051 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3052 *
3053 * Returns zero on success, or a negative errno.
801a16dc 3054 */
3028eb2b 3055int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3056 struct nfs_fsinfo *info,
3057 bool auth_probe)
801a16dc 3058{
2ed4b95b
CL		 3059 int status;
3060
5e6b1990
TM		 3061 switch (auth_probe) {
3062 case false:
3063 status = nfs4_lookup_root(server, fhandle, info);
3064 if (status != -NFS4ERR_WRONGSEC)
3065 break;
5e6b1990 3066 default:
2ed4b95b 3067 status = nfs4_do_find_root_sec(server, fhandle, info);
5e6b1990 3068 }
2ed4b95b 3069
1da177e4
LT		 3070 if (status == 0)
3071 status = nfs4_server_capabilities(server, fhandle);
3072 if (status == 0)
3073 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3074
c12e87f4 3075 return nfs4_map_errors(status);
1da177e4
LT		 3076}
3077
bae36241
BS		 3078static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3079 struct nfs_fsinfo *info)
3080{
3081 int error;
3082 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3083 struct nfs4_label *label = NULL;
bae36241
BS		 3084
3085 error = nfs4_server_capabilities(server, mntfh);
3086 if (error < 0) {
3087 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3088 return error;
3089 }
3090
14c43f76
DQ		 3091 label = nfs4_label_alloc(server, GFP_KERNEL);
3092 if (IS_ERR(label))
3093 return PTR_ERR(label);
3094
1775fd3e 3095 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3096 if (error < 0) {
3097 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3098 goto err_free_label;
bae36241
BS		 3099 }
3100
3101 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3102 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3103 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3104
14c43f76
DQ		 3105err_free_label:
3106 nfs4_label_free(label);
3107
bae36241
BS		 3108 return error;
3109}
3110
6b97fd3d
MN		 3111/*
3112 * Get locations and (maybe) other attributes of a referral.
3113 * Note that we'll actually follow the referral later when
3114 * we detect fsid mismatch in inode revalidation
3115 */
f05d147f
BS		 3116static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3117 const struct qstr *name, struct nfs_fattr *fattr,
3118 struct nfs_fh *fhandle)
6b97fd3d
MN		 3119{
3120 int status = -ENOMEM;
3121 struct page *page = NULL;
3122 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3123
3124 page = alloc_page(GFP_KERNEL);
3125 if (page == NULL)
3126 goto out;
3127 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3128 if (locations == NULL)
3129 goto out;
3130
f05d147f 3131 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3132 if (status != 0)
3133 goto out;
519ae255
CL		 3134
3135 /*
3136 * If the fsid didn't change, this is a migration event, not a
3137 * referral. Cause us to drop into the exception handler, which
3138 * will kick off migration recovery.
3139 */
6b97fd3d 3140 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3141 dprintk("%s: server did not return a different fsid for"
3142 " a referral at %s\n", __func__, name->name);
519ae255 3143 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3144 goto out;
3145 }
533eb461
AA		 3146 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3147 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3148
533eb461 3149 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3150 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3151 memset(fhandle, 0, sizeof(struct nfs_fh));
3152out:
3153 if (page)
3154 __free_page(page);
5d7ca35a 3155 kfree(locations);
6b97fd3d
MN		 3156 return status;
3157}
3158
1775fd3e
DQ		 3159static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3160 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3161{
3162 struct nfs4_getattr_arg args = {
3163 .fh = fhandle,
3164 .bitmask = server->attr_bitmask,
3165 };
3166 struct nfs4_getattr_res res = {
3167 .fattr = fattr,
1775fd3e 3168 .label = label,
1da177e4
LT		 3169 .server = server,
3170 };
3171 struct rpc_message msg = {
3172 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3173 .rpc_argp = &args,
3174 .rpc_resp = &res,
3175 };
aa9c2669
DQ		 3176
3177 args.bitmask = nfs4_bitmask(server, label);
3178
0e574af1 3179 nfs_fattr_init(fattr);
7c513058 3180 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3181}
3182
1775fd3e
DQ		 3183static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3184 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3185{
3186 struct nfs4_exception exception = { };
3187 int err;
3188 do {
b5f875a9
TM		 3189 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3190 trace_nfs4_getattr(server, fhandle, fattr, err);
3191 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3192 &exception);
3193 } while (exception.retry);
3194 return err;
3195}
3196
3197/*
3198 * The file is not closed if it is opened due to the a request to change
3199 * the size of the file. The open call will not be needed once the
3200 * VFS layer lookup-intents are implemented.
3201 *
3202 * Close is called when the inode is destroyed.
3203 * If we haven't opened the file for O_WRONLY, we
3204 * need to in the size_change case to obtain a stateid.
3205 *
3206 * Got race?
3207 * Because OPEN is always done by name in nfsv4, it is
3208 * possible that we opened a different file by the same
3209 * name. We can recognize this race condition, but we
3210 * can't do anything about it besides returning an error.
3211 *
3212 * This will be fixed with VFS changes (lookup-intent).
3213 */
3214static int
3215nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3216 struct iattr *sattr)
3217{
08e9eac4 3218 struct inode *inode = dentry->d_inode;
659bfcd6 3219 struct rpc_cred *cred = NULL;
d530838b 3220 struct nfs4_state *state = NULL;
14c43f76 3221 struct nfs4_label *label = NULL;
1da177e4
LT		 3222 int status;
3223
88ac815c
PT		 3224 if (pnfs_ld_layoutret_on_setattr(inode) &&
3225 sattr->ia_valid & ATTR_SIZE &&
3226 sattr->ia_size < i_size_read(inode))
24028672 3227 pnfs_commit_and_return_layout(inode);
8a1636c4 3228
0e574af1 3229 nfs_fattr_init(fattr);
1da177e4 3230
2669940d
AA		 3231 /* Deal with open(O_TRUNC) */
3232 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3233 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3234
3235 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3236 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3237 return 0;
3238
d530838b 3239 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3240 if (sattr->ia_valid & ATTR_FILE) {
3241 struct nfs_open_context *ctx;
3242
3243 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3244 if (ctx) {
3245 cred = ctx->cred;
3246 state = ctx->state;
3247 }
659bfcd6 3248 }
08e9eac4 3249
14c43f76
DQ		 3250 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3251 if (IS_ERR(label))
3252 return PTR_ERR(label);
3253
3254 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3255 if (status == 0) {
65e4308d 3256 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 3257 nfs_setsecurity(inode, fattr, label);
3258 }
14c43f76 3259 nfs4_label_free(label);
1da177e4
LT		 3260 return status;
3261}
3262
0c2e53f1
TM		 3263static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3264 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3265 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3266{
0c2e53f1 3267 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3268 int status;
3269 struct nfs4_lookup_arg args = {
3270 .bitmask = server->attr_bitmask,
0c2e53f1 3271 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3272 .name = name,
3273 };
3274 struct nfs4_lookup_res res = {
3275 .server = server,
3276 .fattr = fattr,
aa9c2669 3277 .label = label,
2b3de441
DH		 3278 .fh = fhandle,
3279 };
3280 struct rpc_message msg = {
3281 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3282 .rpc_argp = &args,
3283 .rpc_resp = &res,
3284 };
3285
aa9c2669
DQ		 3286 args.bitmask = nfs4_bitmask(server, label);
3287
2b3de441
DH		 3288 nfs_fattr_init(fattr);
3289
1da177e4 3290 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3291 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3292 dprintk("NFS reply lookup: %d\n", status);
3293 return status;
3294}
3295
72de53ec 3296static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3297{
7ebb9315 3298 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3299 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3300 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3301 fattr->nlink = 2;
3302}
3303
72de53ec
BS		 3304static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3305 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3306 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3307{
3308 struct nfs4_exception exception = { };
72de53ec 3309 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3310 int err;
3311 do {
1775fd3e 3312 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3313 trace_nfs4_lookup(dir, name, err);
72de53ec 3314 switch (err) {
08ef7bd3 3315 case -NFS4ERR_BADNAME:
72de53ec
BS		 3316 err = -ENOENT;
3317 goto out;
0c2e53f1 3318 case -NFS4ERR_MOVED:
f05d147f 3319 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3320 goto out;
0c2e53f1 3321 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3322 err = -EPERM;
3323 if (client != *clnt)
3324 goto out;
66b06860 3325 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3326 if (IS_ERR(client))
3327 return PTR_ERR(client);
3328
3329 exception.retry = 1;
3330 break;
3331 default:
3332 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3333 }
1da177e4 3334 } while (exception.retry);
72de53ec
BS		 3335
3336out:
3337 if (err == 0)
3338 *clnt = client;
3339 else if (client != *clnt)
3340 rpc_shutdown_client(client);
3341
1da177e4
LT		 3342 return err;
3343}
3344
80a16b21 3345static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3346 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3347 struct nfs4_label *label)
72de53ec
BS		 3348{
3349 int status;
3350 struct rpc_clnt *client = NFS_CLIENT(dir);
3351
1775fd3e 3352 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3353 if (client != NFS_CLIENT(dir)) {
3354 rpc_shutdown_client(client);
3355 nfs_fixup_secinfo_attributes(fattr);
3356 }
3357 return status;
3358}
3359
f05d147f
BS		 3360struct rpc_clnt *
3361nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3362 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3363{
b72888cb 3364 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3365 int status;
f05d147f 3366
1775fd3e 3367 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3368 if (status < 0)
f05d147f 3369 return ERR_PTR(status);
b72888cb 3370 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3371}
3372
1da177e4
LT		 3373static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3374{
76b32999 3375 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3376 struct nfs4_accessargs args = {
3377 .fh = NFS_FH(inode),
a4980e78 3378 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3379 };
3380 struct nfs4_accessres res = {
3381 .server = server,
1da177e4 3382 };
1da177e4
LT		 3383 struct rpc_message msg = {
3384 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3385 .rpc_argp = &args,
3386 .rpc_resp = &res,
3387 .rpc_cred = entry->cred,
3388 };
3389 int mode = entry->mask;
aa9c2669 3390 int status = 0;
1da177e4
LT		 3391
3392 /*
3393 * Determine which access bits we want to ask for...
3394 */
3395 if (mode & MAY_READ)
3396 args.access |= NFS4_ACCESS_READ;
3397 if (S_ISDIR(inode->i_mode)) {
3398 if (mode & MAY_WRITE)
3399 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3400 if (mode & MAY_EXEC)
3401 args.access |= NFS4_ACCESS_LOOKUP;
3402 } else {
3403 if (mode & MAY_WRITE)
3404 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3405 if (mode & MAY_EXEC)
3406 args.access |= NFS4_ACCESS_EXECUTE;
3407 }
c407d41a
TM		 3408
3409 res.fattr = nfs_alloc_fattr();
3410 if (res.fattr == NULL)
3411 return -ENOMEM;
3412
7c513058 3413 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3414 if (!status) {
6168f62c 3415 nfs_access_set_mask(entry, res.access);
c407d41a 3416 nfs_refresh_inode(inode, res.fattr);
1da177e4 3417 }
c407d41a 3418 nfs_free_fattr(res.fattr);
1da177e4
LT		 3419 return status;
3420}
3421
3422static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3423{
3424 struct nfs4_exception exception = { };
3425 int err;
3426 do {
c1578b76
TM		 3427 err = _nfs4_proc_access(inode, entry);
3428 trace_nfs4_access(inode, err);
3429 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3430 &exception);
3431 } while (exception.retry);
3432 return err;
3433}
3434
3435/*
3436 * TODO: For the time being, we don't try to get any attributes
3437 * along with any of the zero-copy operations READ, READDIR,
3438 * READLINK, WRITE.
3439 *
3440 * In the case of the first three, we want to put the GETATTR
3441 * after the read-type operation -- this is because it is hard
3442 * to predict the length of a GETATTR response in v4, and thus
3443 * align the READ data correctly. This means that the GETATTR
3444 * may end up partially falling into the page cache, and we should
3445 * shift it into the 'tail' of the xdr_buf before processing.
3446 * To do this efficiently, we need to know the total length
3447 * of data received, which doesn't seem to be available outside
3448 * of the RPC layer.
3449 *
3450 * In the case of WRITE, we also want to put the GETATTR after
3451 * the operation -- in this case because we want to make sure
140150db 3452 * we get the post-operation mtime and size.
1da177e4
LT		 3453 *
3454 * Both of these changes to the XDR layer would in fact be quite
3455 * minor, but I decided to leave them for a subsequent patch.
3456 */
3457static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3458 unsigned int pgbase, unsigned int pglen)
3459{
3460 struct nfs4_readlink args = {
3461 .fh = NFS_FH(inode),
3462 .pgbase = pgbase,
3463 .pglen = pglen,
3464 .pages = &page,
3465 };
f50c7000 3466 struct nfs4_readlink_res res;
1da177e4
LT		 3467 struct rpc_message msg = {
3468 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3469 .rpc_argp = &args,
f50c7000 3470 .rpc_resp = &res,
1da177e4
LT		 3471 };
3472
7c513058 3473 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3474}
3475
3476static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3477 unsigned int pgbase, unsigned int pglen)
3478{
3479 struct nfs4_exception exception = { };
3480 int err;
3481 do {
c1578b76
TM		 3482 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3483 trace_nfs4_readlink(inode, err);
3484 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3485 &exception);
3486 } while (exception.retry);
3487 return err;
3488}
3489
1da177e4 3490/*
8867fe58 3491 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3492 */
1da177e4
LT		 3493static int
3494nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3495 int flags)
1da177e4 3496{
aa9c2669 3497 struct nfs4_label l, *ilabel = NULL;
8867fe58 3498 struct nfs_open_context *ctx;
1da177e4 3499 struct nfs4_state *state;
5bc2afc2 3500 int opened = 0;
1da177e4
LT		 3501 int status = 0;
3502
8867fe58
MS		 3503 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3504 if (IS_ERR(ctx))
3505 return PTR_ERR(ctx);
3506
aa9c2669
DQ		 3507 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3508
a8a5da99 3509 sattr->ia_mode &= ~current_umask();
5bc2afc2 3510 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3511 if (IS_ERR(state)) {
3512 status = PTR_ERR(state);
c0204fd2 3513 goto out;
1da177e4 3514 }
1da177e4 3515out:
aa9c2669 3516 nfs4_label_release_security(ilabel);
8867fe58 3517 put_nfs_open_context(ctx);
1da177e4
LT		 3518 return status;
3519}
3520
3521static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3522{
16e42959 3523 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3524 struct nfs_removeargs args = {
1da177e4 3525 .fh = NFS_FH(dir),
26fe5750 3526 .name = *name,
16e42959 3527 };
4fdc17b2 3528 struct nfs_removeres res = {
16e42959 3529 .server = server,
1da177e4 3530 };
1da177e4 3531 struct rpc_message msg = {
4fdc17b2
TM		 3532 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3533 .rpc_argp = &args,
3534 .rpc_resp = &res,
1da177e4 3535 };
778d2817 3536 int status;
1da177e4 3537
7c513058 3538 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3539 if (status == 0)
16e42959 3540 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3541 return status;
3542}
3543
3544static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3545{
3546 struct nfs4_exception exception = { };
3547 int err;
3548 do {
078ea3df
TM		 3549 err = _nfs4_proc_remove(dir, name);
3550 trace_nfs4_remove(dir, name, err);
3551 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3552 &exception);
3553 } while (exception.retry);
3554 return err;
3555}
3556
e4eff1a6 3557static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3558{
e4eff1a6
TM		 3559 struct nfs_server *server = NFS_SERVER(dir);
3560 struct nfs_removeargs *args = msg->rpc_argp;
3561 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3562
e4eff1a6 3563 res->server = server;
1da177e4 3564 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3565 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3566
3567 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3568}
3569
34e137cc
BS		 3570static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3571{
d9afbd1b
TM		 3572 nfs4_setup_sequence(NFS_SERVER(data->dir),
3573 &data->args.seq_args,
3574 &data->res.seq_res,
3575 task);
1da177e4
LT		 3576}
3577
e4eff1a6 3578static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3579{
078ea3df
TM		 3580 struct nfs_unlinkdata *data = task->tk_calldata;
3581 struct nfs_removeres *res = &data->res;
e4eff1a6 3582
14516c3a
TM		 3583 if (!nfs4_sequence_done(task, &res->seq_res))
3584 return 0;
8478eaa1
N		 3585 if (nfs4_async_handle_error(task, res->server, NULL,
3586 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3587 return 0;
3588 update_changeattr(dir, &res->cinfo);
e4eff1a6 3589 return 1;
1da177e4
LT		 3590}
3591
d3d4152a
JL		 3592static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3593{
3594 struct nfs_server *server = NFS_SERVER(dir);
3595 struct nfs_renameargs *arg = msg->rpc_argp;
3596 struct nfs_renameres *res = msg->rpc_resp;
3597
3598 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3599 res->server = server;
a9c92d6b 3600 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3601}
3602
c6bfa1a1
BS		 3603static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3604{
d9afbd1b
TM		 3605 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3606 &data->args.seq_args,
3607 &data->res.seq_res,
3608 task);
d3d4152a
JL		 3609}
3610
3611static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3612 struct inode *new_dir)
3613{
fbc6f7c2
TM		 3614 struct nfs_renamedata *data = task->tk_calldata;
3615 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3616
3617 if (!nfs4_sequence_done(task, &res->seq_res))
3618 return 0;
8478eaa1 3619 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3620 return 0;
3621
3622 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3623 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3624 return 1;
3625}
3626
1da177e4
LT		 3627static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3628{
91ba2eee 3629 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3630 struct nfs4_link_arg arg = {
3631 .fh = NFS_FH(inode),
3632 .dir_fh = NFS_FH(dir),
3633 .name = name,
91ba2eee
TM		 3634 .bitmask = server->attr_bitmask,
3635 };
91ba2eee
TM		 3636 struct nfs4_link_res res = {
3637 .server = server,
1775fd3e 3638 .label = NULL,
1da177e4 3639 };
1da177e4
LT		 3640 struct rpc_message msg = {
3641 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3642 .rpc_argp = &arg,
91ba2eee 3643 .rpc_resp = &res,
1da177e4 3644 };
136f2627
TM		 3645 int status = -ENOMEM;
3646
3647 res.fattr = nfs_alloc_fattr();
778d2817 3648 if (res.fattr == NULL)
136f2627 3649 goto out;
1da177e4 3650
14c43f76
DQ		 3651 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3652 if (IS_ERR(res.label)) {
3653 status = PTR_ERR(res.label);
3654 goto out;
3655 }
aa9c2669 3656 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3657
7c513058 3658 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3659 if (!status) {
3660 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3661 status = nfs_post_op_update_inode(inode, res.fattr);
3662 if (!status)
3663 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3664 }
14c43f76
DQ		 3665
3666
3667 nfs4_label_free(res.label);
3668
136f2627 3669out:
136f2627 3670 nfs_free_fattr(res.fattr);
1da177e4
LT		 3671 return status;
3672}
3673
3674static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3675{
3676 struct nfs4_exception exception = { };
3677 int err;
3678 do {
3679 err = nfs4_handle_exception(NFS_SERVER(inode),
3680 _nfs4_proc_link(inode, dir, name),
3681 &exception);
3682 } while (exception.retry);
3683 return err;
3684}
3685
57dc9a57
TM		 3686struct nfs4_createdata {
3687 struct rpc_message msg;
3688 struct nfs4_create_arg arg;
3689 struct nfs4_create_res res;
3690 struct nfs_fh fh;
3691 struct nfs_fattr fattr;
1775fd3e 3692 struct nfs4_label *label;
57dc9a57
TM		 3693};
3694
3695static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3696 struct qstr *name, struct iattr *sattr, u32 ftype)
3697{
3698 struct nfs4_createdata *data;
3699
3700 data = kzalloc(sizeof(*data), GFP_KERNEL);
3701 if (data != NULL) {
3702 struct nfs_server *server = NFS_SERVER(dir);
3703
14c43f76
DQ		 3704 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3705 if (IS_ERR(data->label))
3706 goto out_free;
3707
57dc9a57
TM		 3708 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3709 data->msg.rpc_argp = &data->arg;
3710 data->msg.rpc_resp = &data->res;
3711 data->arg.dir_fh = NFS_FH(dir);
3712 data->arg.server = server;
3713 data->arg.name = name;
3714 data->arg.attrs = sattr;
3715 data->arg.ftype = ftype;
aa9c2669 3716 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3717 data->res.server = server;
3718 data->res.fh = &data->fh;
3719 data->res.fattr = &data->fattr;
1775fd3e 3720 data->res.label = data->label;
57dc9a57 3721 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3722 }
3723 return data;
14c43f76
DQ		 3724out_free:
3725 kfree(data);
3726 return NULL;
57dc9a57
TM		 3727}
3728
3729static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3730{
7c513058 3731 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3732 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3733 if (status == 0) {
3734 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3735 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3736 }
3737 return status;
3738}
3739
3740static void nfs4_free_createdata(struct nfs4_createdata *data)
3741{
14c43f76 3742 nfs4_label_free(data->label);
57dc9a57
TM		 3743 kfree(data);
3744}
3745
4f390c15 3746static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3747 struct page *page, unsigned int len, struct iattr *sattr,
3748 struct nfs4_label *label)
1da177e4 3749{
57dc9a57
TM		 3750 struct nfs4_createdata *data;
3751 int status = -ENAMETOOLONG;
1da177e4 3752
94a6d753 3753 if (len > NFS4_MAXPATHLEN)
57dc9a57 3754 goto out;
4f390c15 3755
57dc9a57
TM		 3756 status = -ENOMEM;
3757 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3758 if (data == NULL)
3759 goto out;
3760
3761 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3762 data->arg.u.symlink.pages = &page;
3763 data->arg.u.symlink.len = len;
1775fd3e 3764 data->arg.label = label;
1da177e4 3765
57dc9a57
TM		 3766 status = nfs4_do_create(dir, dentry, data);
3767
3768 nfs4_free_createdata(data);
3769out:
1da177e4
LT		 3770 return status;
3771}
3772
4f390c15 3773static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3774 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3775{
3776 struct nfs4_exception exception = { };
aa9c2669 3777 struct nfs4_label l, *label = NULL;
1da177e4 3778 int err;
aa9c2669
DQ		 3779
3780 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3781
1da177e4 3782 do {
078ea3df
TM		 3783 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3784 trace_nfs4_symlink(dir, &dentry->d_name, err);
3785 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3786 &exception);
3787 } while (exception.retry);
aa9c2669
DQ		 3788
3789 nfs4_label_release_security(label);
1da177e4
LT		 3790 return err;
3791}
3792
3793static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3794 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3795{
57dc9a57
TM		 3796 struct nfs4_createdata *data;
3797 int status = -ENOMEM;
1da177e4 3798
57dc9a57
TM		 3799 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3800 if (data == NULL)
3801 goto out;
3802
1775fd3e 3803 data->arg.label = label;
57dc9a57
TM		 3804 status = nfs4_do_create(dir, dentry, data);
3805
3806 nfs4_free_createdata(data);
3807out:
1da177e4
LT		 3808 return status;
3809}
3810
3811static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3812 struct iattr *sattr)
3813{
3814 struct nfs4_exception exception = { };
aa9c2669 3815 struct nfs4_label l, *label = NULL;
1da177e4 3816 int err;
a8a5da99 3817
aa9c2669
DQ		 3818 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3819
a8a5da99 3820 sattr->ia_mode &= ~current_umask();
1da177e4 3821 do {
078ea3df
TM		 3822 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3823 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3824 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3825 &exception);
3826 } while (exception.retry);
aa9c2669
DQ		 3827 nfs4_label_release_security(label);
3828
1da177e4
LT		 3829 return err;
3830}
3831
3832static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3833 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3834{
3835 struct inode *dir = dentry->d_inode;
3836 struct nfs4_readdir_arg args = {
3837 .fh = NFS_FH(dir),
56e4ebf8 3838 .pages = pages,
1da177e4
LT		 3839 .pgbase = 0,
3840 .count = count,
96d25e53 3841 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3842 .plus = plus,
1da177e4
LT		 3843 };
3844 struct nfs4_readdir_res res;
3845 struct rpc_message msg = {
3846 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3847 .rpc_argp = &args,
3848 .rpc_resp = &res,
3849 .rpc_cred = cred,
3850 };
3851 int status;
3852
6de1472f
AV		 3853 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3854 dentry,
eadf4598 3855 (unsigned long long)cookie);
c3f52af3 3856 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3857 res.pgbase = args.pgbase;
7c513058 3858 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3859 if (status >= 0) {
c3f52af3 3860 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3861 status += args.pgbase;
3862 }
c4812998
TM		 3863
3864 nfs_invalidate_atime(dir);
3865
3110ff80 3866 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3867 return status;
3868}
3869
3870static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3871 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3872{
3873 struct nfs4_exception exception = { };
3874 int err;
3875 do {
c1578b76
TM		 3876 err = _nfs4_proc_readdir(dentry, cred, cookie,
3877 pages, count, plus);
3878 trace_nfs4_readdir(dentry->d_inode, err);
3879 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3880 &exception);
3881 } while (exception.retry);
3882 return err;
3883}
3884
3885static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3886 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3887{
57dc9a57
TM		 3888 struct nfs4_createdata *data;
3889 int mode = sattr->ia_mode;
3890 int status = -ENOMEM;
1da177e4 3891
57dc9a57
TM		 3892 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3893 if (data == NULL)
3894 goto out;
3895
1da177e4 3896 if (S_ISFIFO(mode))
57dc9a57 3897 data->arg.ftype = NF4FIFO;
1da177e4 3898 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3899 data->arg.ftype = NF4BLK;
3900 data->arg.u.device.specdata1 = MAJOR(rdev);
3901 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3902 }
3903 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3904 data->arg.ftype = NF4CHR;
3905 data->arg.u.device.specdata1 = MAJOR(rdev);
3906 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3907 } else if (!S_ISSOCK(mode)) {
3908 status = -EINVAL;
3909 goto out_free;
1da177e4 3910 }
1775fd3e 3911
aa9c2669 3912 data->arg.label = label;
57dc9a57 3913 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3914out_free:
57dc9a57
TM		 3915 nfs4_free_createdata(data);
3916out:
1da177e4
LT		 3917 return status;
3918}
3919
3920static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3921 struct iattr *sattr, dev_t rdev)
3922{
3923 struct nfs4_exception exception = { };
aa9c2669 3924 struct nfs4_label l, *label = NULL;
1da177e4 3925 int err;
a8a5da99 3926
aa9c2669
DQ		 3927 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3928
a8a5da99 3929 sattr->ia_mode &= ~current_umask();
1da177e4 3930 do {
078ea3df
TM		 3931 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3932 trace_nfs4_mknod(dir, &dentry->d_name, err);
3933 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3934 &exception);
3935 } while (exception.retry);
aa9c2669
DQ		 3936
3937 nfs4_label_release_security(label);
3938
1da177e4
LT		 3939 return err;
3940}
3941
3942static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3943 struct nfs_fsstat *fsstat)
3944{
3945 struct nfs4_statfs_arg args = {
3946 .fh = fhandle,
3947 .bitmask = server->attr_bitmask,
3948 };
24ad148a
BH		 3949 struct nfs4_statfs_res res = {
3950 .fsstat = fsstat,
3951 };
1da177e4
LT		 3952 struct rpc_message msg = {
3953 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3954 .rpc_argp = &args,
24ad148a 3955 .rpc_resp = &res,
1da177e4
LT		 3956 };
3957
0e574af1 3958 nfs_fattr_init(fsstat->fattr);
7c513058 3959 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3960}
3961
3962static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3963{
3964 struct nfs4_exception exception = { };
3965 int err;
3966 do {
3967 err = nfs4_handle_exception(server,
3968 _nfs4_proc_statfs(server, fhandle, fsstat),
3969 &exception);
3970 } while (exception.retry);
3971 return err;
3972}
3973
3974static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3975 struct nfs_fsinfo *fsinfo)
3976{
3977 struct nfs4_fsinfo_arg args = {
3978 .fh = fhandle,
3979 .bitmask = server->attr_bitmask,
3980 };
3dda5e43
BH		 3981 struct nfs4_fsinfo_res res = {
3982 .fsinfo = fsinfo,
3983 };
1da177e4
LT		 3984 struct rpc_message msg = {
3985 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3986 .rpc_argp = &args,
3dda5e43 3987 .rpc_resp = &res,
1da177e4
LT		 3988 };
3989
7c513058 3990 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3991}
3992
3993static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3994{
3995 struct nfs4_exception exception = { };
83ca7f5a 3996 unsigned long now = jiffies;
1da177e4
LT		 3997 int err;
3998
3999 do {
83ca7f5a 4000 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4001 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4002 if (err == 0) {
4003 struct nfs_client *clp = server->nfs_client;
4004
4005 spin_lock(&clp->cl_lock);
4006 clp->cl_lease_time = fsinfo->lease_time * HZ;
4007 clp->cl_last_renewal = now;
4008 spin_unlock(&clp->cl_lock);
4009 break;
4010 }
4011 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4012 } while (exception.retry);
4013 return err;
4014}
4015
4016static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4017{
e38eb650
BS		 4018 int error;
4019
0e574af1 4020 nfs_fattr_init(fsinfo->fattr);
e38eb650 4021 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4022 if (error == 0) {
4023 /* block layout checks this! */
4024 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4025 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4026 }
e38eb650
BS		 4027
4028 return error;
1da177e4
LT		 4029}
4030
4031static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4032 struct nfs_pathconf *pathconf)
4033{
4034 struct nfs4_pathconf_arg args = {
4035 .fh = fhandle,
4036 .bitmask = server->attr_bitmask,
4037 };
d45b2989
BH		 4038 struct nfs4_pathconf_res res = {
4039 .pathconf = pathconf,
4040 };
1da177e4
LT		 4041 struct rpc_message msg = {
4042 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4043 .rpc_argp = &args,
d45b2989 4044 .rpc_resp = &res,
1da177e4
LT		 4045 };
4046
4047 /* None of the pathconf attributes are mandatory to implement */
4048 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4049 memset(pathconf, 0, sizeof(*pathconf));
4050 return 0;
4051 }
4052
0e574af1 4053 nfs_fattr_init(pathconf->fattr);
7c513058 4054 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4055}
4056
4057static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4058 struct nfs_pathconf *pathconf)
4059{
4060 struct nfs4_exception exception = { };
4061 int err;
4062
4063 do {
4064 err = nfs4_handle_exception(server,
4065 _nfs4_proc_pathconf(server, fhandle, pathconf),
4066 &exception);
4067 } while (exception.retry);
4068 return err;
4069}
4070
5521abfd 4071int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4072 const struct nfs_open_context *ctx,
4073 const struct nfs_lock_context *l_ctx,
4074 fmode_t fmode)
4075{
4076 const struct nfs_lockowner *lockowner = NULL;
4077
4078 if (l_ctx != NULL)
4079 lockowner = &l_ctx->lockowner;
5521abfd 4080 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4081}
4082EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4083
5521abfd
TM		 4084static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4085 const struct nfs_open_context *ctx,
4086 const struct nfs_lock_context *l_ctx,
4087 fmode_t fmode)
4088{
4089 nfs4_stateid current_stateid;
4090
e1253be0
TM		 4091 /* If the current stateid represents a lost lock, then exit */
4092 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4093 return true;
5521abfd
TM		 4094 return nfs4_stateid_match(stateid, &current_stateid);
4095}
4096
4097static bool nfs4_error_stateid_expired(int err)
4098{
4099 switch (err) {
4100 case -NFS4ERR_DELEG_REVOKED:
4101 case -NFS4ERR_ADMIN_REVOKED:
4102 case -NFS4ERR_BAD_STATEID:
4103 case -NFS4ERR_STALE_STATEID:
4104 case -NFS4ERR_OLD_STATEID:
4105 case -NFS4ERR_OPENMODE:
4106 case -NFS4ERR_EXPIRED:
4107 return true;
4108 }
4109 return false;
4110}
4111
d45f60c6 4112void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4113{
d45f60c6 4114 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4115}
4116
d45f60c6 4117static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4118{
d45f60c6 4119 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4120
d45f60c6
WAA		 4121 trace_nfs4_read(hdr, task->tk_status);
4122 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4123 hdr->args.context->state,
4124 NULL) == -EAGAIN) {
d00c5d43 4125 rpc_restart_call_prepare(task);
ec06c096 4126 return -EAGAIN;
1da177e4 4127 }
8850df99 4128
d45f60c6 4129 __nfs4_read_done_cb(hdr);
1da177e4 4130 if (task->tk_status > 0)
d45f60c6 4131 renew_lease(server, hdr->timestamp);
ec06c096 4132 return 0;
1da177e4
LT		 4133}
4134
5521abfd 4135static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4136 struct nfs_pgio_args *args)
5521abfd
TM		 4137{
4138
4139 if (!nfs4_error_stateid_expired(task->tk_status) ||
4140 nfs4_stateid_is_current(&args->stateid,
4141 args->context,
4142 args->lock_context,
4143 FMODE_READ))
4144 return false;
4145 rpc_restart_call_prepare(task);
4146 return true;
4147}
4148
d45f60c6 4149static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4150{
4151
4152 dprintk("--> %s\n", __func__);
4153
d45f60c6 4154 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4155 return -EAGAIN;
d45f60c6 4156 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4157 return -EAGAIN;
d45f60c6
WAA		 4158 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4159 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4160}
4161
d45f60c6
WAA		 4162static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4163 struct rpc_message *msg)
1da177e4 4164{
d45f60c6
WAA		 4165 hdr->timestamp = jiffies;
4166 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4167 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4168 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4169}
4170
d45f60c6
WAA		 4171static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4172 struct nfs_pgio_header *hdr)
ea7c3303 4173{
d45f60c6
WAA		 4174 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4175 &hdr->args.seq_args,
4176 &hdr->res.seq_res,
9b206149 4177 task))
ef1820f9 4178 return 0;
d45f60c6
WAA		 4179 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4180 hdr->args.lock_context,
4181 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4182 return -EIO;
d45f60c6 4183 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4184 return -EIO;
4185 return 0;
1da177e4
LT		 4186}
4187
d45f60c6
WAA		 4188static int nfs4_write_done_cb(struct rpc_task *task,
4189 struct nfs_pgio_header *hdr)
1da177e4 4190{
d45f60c6 4191 struct inode *inode = hdr->inode;
8478eaa1 4192
d45f60c6
WAA		 4193 trace_nfs4_write(hdr, task->tk_status);
4194 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4195 hdr->args.context->state,
4196 NULL) == -EAGAIN) {
d00c5d43 4197 rpc_restart_call_prepare(task);
788e7a89 4198 return -EAGAIN;
1da177e4 4199 }
4f9838c7 4200 if (task->tk_status >= 0) {
d45f60c6
WAA		 4201 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4202 nfs_post_op_update_inode_force_wcc(inode, &hdr->fattr);
4f9838c7 4203 }
788e7a89 4204 return 0;
1da177e4
LT		 4205}
4206
5521abfd 4207static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4208 struct nfs_pgio_args *args)
5521abfd
TM		 4209{
4210
4211 if (!nfs4_error_stateid_expired(task->tk_status) ||
4212 nfs4_stateid_is_current(&args->stateid,
4213 args->context,
4214 args->lock_context,
4215 FMODE_WRITE))
4216 return false;
4217 rpc_restart_call_prepare(task);
4218 return true;
4219}
4220
d45f60c6 4221static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4222{
d45f60c6 4223 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4224 return -EAGAIN;
d45f60c6 4225 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4226 return -EAGAIN;
d45f60c6
WAA		 4227 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4228 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4229}
4230
5a37f851 4231static
d45f60c6 4232bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4233{
5a37f851 4234 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4235 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4236 return false;
4237 /* Otherwise, request attributes if and only if we don't hold
4238 * a delegation
4239 */
011e2a7f 4240 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4241}
a69aef14 4242
d45f60c6
WAA		 4243static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4244 struct rpc_message *msg)
1da177e4 4245{
d45f60c6 4246 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4247
d45f60c6
WAA		 4248 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4249 hdr->args.bitmask = NULL;
4250 hdr->res.fattr = NULL;
7ffd1064 4251 } else
d45f60c6 4252 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4253
d45f60c6
WAA		 4254 if (!hdr->pgio_done_cb)
4255 hdr->pgio_done_cb = nfs4_write_done_cb;
4256 hdr->res.server = server;
4257 hdr->timestamp = jiffies;
1da177e4 4258
bdc7f021 4259 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4260 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4261}
4262
0b7c0153 4263static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4264{
d9afbd1b
TM		 4265 nfs4_setup_sequence(NFS_SERVER(data->inode),
4266 &data->args.seq_args,
4267 &data->res.seq_res,
4268 task);
1da177e4
LT		 4269}
4270
0b7c0153 4271static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4272{
1da177e4 4273 struct inode *inode = data->inode;
14516c3a 4274
cc668ab3 4275 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4276 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4277 NULL, NULL) == -EAGAIN) {
d00c5d43 4278 rpc_restart_call_prepare(task);
788e7a89 4279 return -EAGAIN;
1da177e4 4280 }
788e7a89 4281 return 0;
1da177e4
LT		 4282}
4283
0b7c0153 4284static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4285{
4286 if (!nfs4_sequence_done(task, &data->res.seq_res))
4287 return -EAGAIN;
0b7c0153 4288 return data->commit_done_cb(task, data);
5f452431
FI		 4289}
4290
0b7c0153 4291static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4292{
788e7a89 4293 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4294
0b7c0153
FI		 4295 if (data->commit_done_cb == NULL)
4296 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4297 data->res.server = server;
bdc7f021 4298 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4299 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4300}
4301
9bc4e3ca
CL		 4302struct nfs4_renewdata {
4303 struct nfs_client *client;
4304 unsigned long timestamp;
4305};
4306
1da177e4
LT		 4307/*
4308 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4309 * standalone procedure for queueing an asynchronous RENEW.
4310 */
9bc4e3ca 4311static void nfs4_renew_release(void *calldata)
dc96aef9 4312{
9bc4e3ca
CL		 4313 struct nfs4_renewdata *data = calldata;
4314 struct nfs_client *clp = data->client;
dc96aef9 4315
0851de06
AB		 4316 if (atomic_read(&clp->cl_count) > 1)
4317 nfs4_schedule_state_renewal(clp);
4318 nfs_put_client(clp);
9bc4e3ca 4319 kfree(data);
dc96aef9
AB		 4320}
4321
9bc4e3ca 4322static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4323{
9bc4e3ca
CL		 4324 struct nfs4_renewdata *data = calldata;
4325 struct nfs_client *clp = data->client;
4326 unsigned long timestamp = data->timestamp;
1da177e4 4327
c6d01c6f 4328 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4329 switch (task->tk_status) {
4330 case 0:
4331 break;
4332 case -NFS4ERR_LEASE_MOVED:
4333 nfs4_schedule_lease_moved_recovery(clp);
4334 break;
4335 default:
95baa25c 4336 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4337 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4338 return;
4339 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4340 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4341 return;
4342 }
4343 nfs4_schedule_path_down_recovery(clp);
1da177e4 4344 }
452e9352 4345 do_renew_lease(clp, timestamp);
1da177e4
LT		 4346}
4347
963d8fe5
TM		 4348static const struct rpc_call_ops nfs4_renew_ops = {
4349 .rpc_call_done = nfs4_renew_done,
dc96aef9 4350 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4351};
4352
2f60ea6b 4353static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4354{
4355 struct rpc_message msg = {
4356 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4357 .rpc_argp = clp,
b4454fe1 4358 .rpc_cred = cred,
1da177e4 4359 };
9bc4e3ca 4360 struct nfs4_renewdata *data;
1da177e4 4361
2f60ea6b
TM		 4362 if (renew_flags == 0)
4363 return 0;
0851de06
AB		 4364 if (!atomic_inc_not_zero(&clp->cl_count))
4365 return -EIO;
b569ad34 4366 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4367 if (data == NULL)
4368 return -ENOMEM;
4369 data->client = clp;
4370 data->timestamp = jiffies;
bc7a05ca 4371 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4372 &nfs4_renew_ops, data);
1da177e4
LT		 4373}
4374
8534d4ec 4375static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4376{
4377 struct rpc_message msg = {
4378 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4379 .rpc_argp = clp,
b4454fe1 4380 .rpc_cred = cred,
1da177e4
LT		 4381 };
4382 unsigned long now = jiffies;
4383 int status;
4384
bc7a05ca 4385 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4386 if (status < 0)
4387 return status;
452e9352 4388 do_renew_lease(clp, now);
1da177e4
LT		 4389 return 0;
4390}
4391
aa1870af
BF		 4392static inline int nfs4_server_supports_acls(struct nfs_server *server)
4393{
7dd7d959 4394 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4395}
4396
21f498c2
TM		 4397/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4398 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4399 * the stack.
4400 */
21f498c2 4401#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4402
e9e3d724
NH		 4403static int buf_to_pages_noslab(const void *buf, size_t buflen,
4404 struct page **pages, unsigned int *pgbase)
4405{
4406 struct page *newpage, **spages;
4407 int rc = 0;
4408 size_t len;
4409 spages = pages;
4410
4411 do {
21f498c2 4412 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4413 newpage = alloc_page(GFP_KERNEL);
4414
4415 if (newpage == NULL)
4416 goto unwind;
4417 memcpy(page_address(newpage), buf, len);
4418 buf += len;
4419 buflen -= len;
4420 *pages++ = newpage;
4421 rc++;
4422 } while (buflen != 0);
4423
4424 return rc;
4425
4426unwind:
4427 for(; rc > 0; rc--)
4428 __free_page(spages[rc-1]);
4429 return -ENOMEM;
4430}
4431
e50a1c2e
BF		 4432struct nfs4_cached_acl {
4433 int cached;
4434 size_t len;
3e9d4154 4435 char data[0];
e50a1c2e
BF		 4436};
4437
4438static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4439{
4440 struct nfs_inode *nfsi = NFS_I(inode);
4441
4442 spin_lock(&inode->i_lock);
4443 kfree(nfsi->nfs4_acl);
4444 nfsi->nfs4_acl = acl;
4445 spin_unlock(&inode->i_lock);
4446}
4447
4448static void nfs4_zap_acl_attr(struct inode *inode)
4449{
4450 nfs4_set_cached_acl(inode, NULL);
4451}
4452
4453static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4454{
4455 struct nfs_inode *nfsi = NFS_I(inode);
4456 struct nfs4_cached_acl *acl;
4457 int ret = -ENOENT;
4458
4459 spin_lock(&inode->i_lock);
4460 acl = nfsi->nfs4_acl;
4461 if (acl == NULL)
4462 goto out;
4463 if (buf == NULL) /* user is just asking for length */
4464 goto out_len;
4465 if (acl->cached == 0)
4466 goto out;
4467 ret = -ERANGE; /* see getxattr(2) man page */
4468 if (acl->len > buflen)
4469 goto out;
4470 memcpy(buf, acl->data, acl->len);
4471out_len:
4472 ret = acl->len;
4473out:
4474 spin_unlock(&inode->i_lock);
4475 return ret;
4476}
4477
5794d21e 4478static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4479{
4480 struct nfs4_cached_acl *acl;
b291f1b1 4481 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4482
1f1ea6c2 4483 if (buflen <= PAGE_SIZE) {
b291f1b1 4484 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4485 if (acl == NULL)
4486 goto out;
4487 acl->cached = 1;
5794d21e 4488 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4489 } else {
4490 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4491 if (acl == NULL)
4492 goto out;
4493 acl->cached = 0;
4494 }
4495 acl->len = acl_len;
4496out:
4497 nfs4_set_cached_acl(inode, acl);
4498}
4499
bf118a34
AA		 4500/*
4501 * The getxattr API returns the required buffer length when called with a
4502 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4503 * the required buf. On a NULL buf, we send a page of data to the server
4504 * guessing that the ACL request can be serviced by a page. If so, we cache
4505 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4506 * the cache. If not so, we throw away the page, and cache the required
4507 * length. The next getxattr call will then produce another round trip to
4508 * the server, this time with the input buf of the required size.
4509 */
16b4289c 4510static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4511{
bf118a34 4512 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4513 struct nfs_getaclargs args = {
4514 .fh = NFS_FH(inode),
4515 .acl_pages = pages,
4516 .acl_len = buflen,
4517 };
663c79b3
BH		 4518 struct nfs_getaclres res = {
4519 .acl_len = buflen,
4520 };
aa1870af
BF		 4521 struct rpc_message msg = {
4522 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4523 .rpc_argp = &args,
663c79b3 4524 .rpc_resp = &res,
aa1870af 4525 };
21f498c2
TM		 4526 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4527 int ret = -ENOMEM, i;
aa1870af 4528
bf118a34
AA		 4529 /* As long as we're doing a round trip to the server anyway,
4530 * let's be prepared for a page of acl data. */
4531 if (npages == 0)
4532 npages = 1;
21f498c2
TM		 4533 if (npages > ARRAY_SIZE(pages))
4534 return -ERANGE;
5a006899 4535
bf118a34
AA		 4536 for (i = 0; i < npages; i++) {
4537 pages[i] = alloc_page(GFP_KERNEL);
4538 if (!pages[i])
4539 goto out_free;
e50a1c2e 4540 }
5a006899
SP		 4541
4542 /* for decoding across pages */
4543 res.acl_scratch = alloc_page(GFP_KERNEL);
4544 if (!res.acl_scratch)
4545 goto out_free;
4546
bf118a34
AA		 4547 args.acl_len = npages * PAGE_SIZE;
4548 args.acl_pgbase = 0;
5a006899 4549
de040bec 4550 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4551 __func__, buf, buflen, npages, args.acl_len);
4552 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4553 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4554 if (ret)
4555 goto out_free;
bf118a34 4556
1f1ea6c2
TM		 4557 /* Handle the case where the passed-in buffer is too short */
4558 if (res.acl_flags & NFS4_ACL_TRUNC) {
4559 /* Did the user only issue a request for the acl length? */
4560 if (buf == NULL)
4561 goto out_ok;
e50a1c2e 4562 ret = -ERANGE;
1f1ea6c2 4563 goto out_free;
e50a1c2e 4564 }
1f1ea6c2 4565 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4566 if (buf) {
4567 if (res.acl_len > buflen) {
4568 ret = -ERANGE;
4569 goto out_free;
4570 }
1f1ea6c2 4571 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4572 }
1f1ea6c2
TM		 4573out_ok:
4574 ret = res.acl_len;
e50a1c2e 4575out_free:
bf118a34
AA		 4576 for (i = 0; i < npages; i++)
4577 if (pages[i])
4578 __free_page(pages[i]);
331818f1
TM		 4579 if (res.acl_scratch)
4580 __free_page(res.acl_scratch);
aa1870af
BF		 4581 return ret;
4582}
4583
16b4289c
TM		 4584static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4585{
4586 struct nfs4_exception exception = { };
4587 ssize_t ret;
4588 do {
4589 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4590 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4591 if (ret >= 0)
4592 break;
4593 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4594 } while (exception.retry);
4595 return ret;
4596}
4597
e50a1c2e
BF		 4598static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4599{
4600 struct nfs_server *server = NFS_SERVER(inode);
4601 int ret;
4602
4603 if (!nfs4_server_supports_acls(server))
4604 return -EOPNOTSUPP;
4605 ret = nfs_revalidate_inode(server, inode);
4606 if (ret < 0)
4607 return ret;
08a22b39
AK		 4608 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4609 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4610 ret = nfs4_read_cached_acl(inode, buf, buflen);
4611 if (ret != -ENOENT)
bf118a34
AA		 4612 /* -ENOENT is returned if there is no ACL or if there is an ACL
4613 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4614 return ret;
4615 return nfs4_get_acl_uncached(inode, buf, buflen);
4616}
4617
16b4289c 4618static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4619{
4620 struct nfs_server *server = NFS_SERVER(inode);
4621 struct page *pages[NFS4ACL_MAXPAGES];
4622 struct nfs_setaclargs arg = {
4623 .fh = NFS_FH(inode),
4624 .acl_pages = pages,
4625 .acl_len = buflen,
4626 };
73c403a9 4627 struct nfs_setaclres res;
4b580ee3
BF		 4628 struct rpc_message msg = {
4629 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4630 .rpc_argp = &arg,
73c403a9 4631 .rpc_resp = &res,
4b580ee3 4632 };
21f498c2 4633 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4634 int ret, i;
4b580ee3
BF		 4635
4636 if (!nfs4_server_supports_acls(server))
4637 return -EOPNOTSUPP;
21f498c2
TM		 4638 if (npages > ARRAY_SIZE(pages))
4639 return -ERANGE;
e9e3d724
NH		 4640 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4641 if (i < 0)
4642 return i;
57ec14c5 4643 nfs4_inode_return_delegation(inode);
7c513058 4644 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4645
4646 /*
4647 * Free each page after tx, so the only ref left is
4648 * held by the network stack
4649 */
4650 for (; i > 0; i--)
4651 put_page(pages[i-1]);
4652
08a22b39
AK		 4653 /*
4654 * Acl update can result in inode attribute update.
4655 * so mark the attribute cache invalid.
4656 */
4657 spin_lock(&inode->i_lock);
4658 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4659 spin_unlock(&inode->i_lock);
f41f7418
TM		 4660 nfs_access_zap_cache(inode);
4661 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4662 return ret;
4663}
4664
16b4289c
TM		 4665static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4666{
4667 struct nfs4_exception exception = { };
4668 int err;
4669 do {
c1578b76
TM		 4670 err = __nfs4_proc_set_acl(inode, buf, buflen);
4671 trace_nfs4_set_acl(inode, err);
4672 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4673 &exception);
4674 } while (exception.retry);
4675 return err;
4676}
4677
aa9c2669
DQ		 4678#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4679static int _nfs4_get_security_label(struct inode *inode, void *buf,
4680 size_t buflen)
4681{
4682 struct nfs_server *server = NFS_SERVER(inode);
4683 struct nfs_fattr fattr;
4684 struct nfs4_label label = {0, 0, buflen, buf};
4685
4686 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4687 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4688 .fh = NFS_FH(inode),
4689 .bitmask = bitmask,
4690 };
4691 struct nfs4_getattr_res res = {
4692 .fattr = &fattr,
4693 .label = &label,
4694 .server = server,
4695 };
4696 struct rpc_message msg = {
4697 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4698 .rpc_argp = &arg,
aa9c2669
DQ		 4699 .rpc_resp = &res,
4700 };
4701 int ret;
4702
4703 nfs_fattr_init(&fattr);
4704
fcb63a9b 4705 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4706 if (ret)
4707 return ret;
4708 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4709 return -ENOENT;
4710 if (buflen < label.len)
4711 return -ERANGE;
4712 return 0;
4713}
4714
4715static int nfs4_get_security_label(struct inode *inode, void *buf,
4716 size_t buflen)
4717{
4718 struct nfs4_exception exception = { };
4719 int err;
4720
4721 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4722 return -EOPNOTSUPP;
4723
4724 do {
c1578b76
TM		 4725 err = _nfs4_get_security_label(inode, buf, buflen);
4726 trace_nfs4_get_security_label(inode, err);
4727 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4728 &exception);
4729 } while (exception.retry);
4730 return err;
4731}
4732
4733static int _nfs4_do_set_security_label(struct inode *inode,
4734 struct nfs4_label *ilabel,
4735 struct nfs_fattr *fattr,
4736 struct nfs4_label *olabel)
4737{
4738
4739 struct iattr sattr = {0};
4740 struct nfs_server *server = NFS_SERVER(inode);
4741 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4742 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4743 .fh = NFS_FH(inode),
4744 .iap = &sattr,
4745 .server = server,
4746 .bitmask = bitmask,
4747 .label = ilabel,
4748 };
4749 struct nfs_setattrres res = {
4750 .fattr = fattr,
4751 .label = olabel,
4752 .server = server,
4753 };
4754 struct rpc_message msg = {
4755 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4756 .rpc_argp = &arg,
aa9c2669
DQ		 4757 .rpc_resp = &res,
4758 };
4759 int status;
4760
12207f69 4761 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4762
12207f69 4763 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4764 if (status)
4765 dprintk("%s failed: %d\n", __func__, status);
4766
4767 return status;
4768}
4769
4770static int nfs4_do_set_security_label(struct inode *inode,
4771 struct nfs4_label *ilabel,
4772 struct nfs_fattr *fattr,
4773 struct nfs4_label *olabel)
4774{
4775 struct nfs4_exception exception = { };
4776 int err;
4777
4778 do {
c1578b76
TM		 4779 err = _nfs4_do_set_security_label(inode, ilabel,
4780 fattr, olabel);
4781 trace_nfs4_set_security_label(inode, err);
4782 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4783 &exception);
4784 } while (exception.retry);
4785 return err;
4786}
4787
4788static int
4789nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4790{
4791 struct nfs4_label ilabel, *olabel = NULL;
4792 struct nfs_fattr fattr;
4793 struct rpc_cred *cred;
4794 struct inode *inode = dentry->d_inode;
4795 int status;
4796
4797 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4798 return -EOPNOTSUPP;
4799
4800 nfs_fattr_init(&fattr);
4801
4802 ilabel.pi = 0;
4803 ilabel.lfs = 0;
4804 ilabel.label = (char *)buf;
4805 ilabel.len = buflen;
4806
4807 cred = rpc_lookup_cred();
4808 if (IS_ERR(cred))
4809 return PTR_ERR(cred);
4810
4811 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4812 if (IS_ERR(olabel)) {
4813 status = -PTR_ERR(olabel);
4814 goto out;
4815 }
4816
4817 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4818 if (status == 0)
4819 nfs_setsecurity(inode, &fattr, olabel);
4820
4821 nfs4_label_free(olabel);
4822out:
4823 put_rpccred(cred);
4824 return status;
4825}
4826#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4827
4828
1da177e4 4829static int
8478eaa1
N		 4830nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4831 struct nfs4_state *state, long *timeout)
1da177e4 4832{
aa5190d0
TM		 4833 struct nfs_client *clp = server->nfs_client;
4834
4835 if (task->tk_status >= 0)
1da177e4
LT		 4836 return 0;
4837 switch(task->tk_status) {
a1d0b5ee 4838 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4839 case -NFS4ERR_ADMIN_REVOKED:
4840 case -NFS4ERR_BAD_STATEID:
4841 case -NFS4ERR_OPENMODE:
4842 if (state == NULL)
4843 break;
5d422301 4844 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4845 goto recovery_failed;
0400a6b0 4846 goto wait_on_recovery;
0ced63d1 4847 case -NFS4ERR_EXPIRED:
5d422301
TM		 4848 if (state != NULL) {
4849 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4850 goto recovery_failed;
5d422301 4851 }
1da177e4 4852 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4853 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4854 nfs4_schedule_lease_recovery(clp);
4855 goto wait_on_recovery;
519ae255
CL		 4856 case -NFS4ERR_MOVED:
4857 if (nfs4_schedule_migration_recovery(server) < 0)
4858 goto recovery_failed;
4859 goto wait_on_recovery;
8ef2f8d4
CL		 4860 case -NFS4ERR_LEASE_MOVED:
4861 nfs4_schedule_lease_moved_recovery(clp);
4862 goto wait_on_recovery;
4745e315
AA		 4863#if defined(CONFIG_NFS_V4_1)
4864 case -NFS4ERR_BADSESSION:
4865 case -NFS4ERR_BADSLOT:
4866 case -NFS4ERR_BAD_HIGH_SLOT:
4867 case -NFS4ERR_DEADSESSION:
4868 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4869 case -NFS4ERR_SEQ_FALSE_RETRY:
4870 case -NFS4ERR_SEQ_MISORDERED:
4871 dprintk("%s ERROR %d, Reset session\n", __func__,
4872 task->tk_status);
9f594791 4873 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4874 goto wait_on_recovery;
4745e315 4875#endif /* CONFIG_NFS_V4_1 */
1da177e4 4876 case -NFS4ERR_DELAY:
aa5190d0 4877 nfs_inc_server_stats(server, NFSIOS_DELAY);
8478eaa1
N		 4878 rpc_delay(task, nfs4_update_delay(timeout));
4879 goto restart_call;
006ea73e 4880 case -NFS4ERR_GRACE:
1da177e4 4881 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4882 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4883 case -NFS4ERR_OLD_STATEID:
f1478c13 4884 goto restart_call;
1da177e4
LT		 4885 }
4886 task->tk_status = nfs4_map_errors(task->tk_status);
4887 return 0;
9f51a78e 4888recovery_failed:
5d422301
TM		 4889 task->tk_status = -EIO;
4890 return 0;
0400a6b0 4891wait_on_recovery:
a2c0b9e2 4892 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4893 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4894 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4895 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4896 goto recovery_failed;
f1478c13 4897restart_call:
a2c0b9e2
TM		 4898 task->tk_status = 0;
4899 return -EAGAIN;
1da177e4
LT		 4900}
4901
f092075d
CL		 4902static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4903 nfs4_verifier *bootverf)
cd93710e
CL		 4904{
4905 __be32 verf[2];
4906
2c820d9a
CL		 4907 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4908 /* An impossible timestamp guarantees this value
4909 * will never match a generated boot time. */
4910 verf[0] = 0;
17f26b12 4911 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4912 } else {
f092075d 4913 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4914 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4915 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4916 }
cd93710e
CL		 4917 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4918}
4919
e984a55a 4920static unsigned int
ceb3a16c 4921nfs4_init_nonuniform_client_string(struct nfs_client *clp,
e984a55a
CL		 4922 char *buf, size_t len)
4923{
4924 unsigned int result;
4925
ceb3a16c
TM		 4926 if (clp->cl_owner_id != NULL)
4927 return strlcpy(buf, clp->cl_owner_id, len);
4928
e984a55a
CL		 4929 rcu_read_lock();
4930 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4931 clp->cl_ipaddr,
4932 rpc_peeraddr2str(clp->cl_rpcclient,
4933 RPC_DISPLAY_ADDR),
4934 rpc_peeraddr2str(clp->cl_rpcclient,
4935 RPC_DISPLAY_PROTO));
4936 rcu_read_unlock();
ceb3a16c 4937 clp->cl_owner_id = kstrdup(buf, GFP_KERNEL);
e984a55a
CL		 4938 return result;
4939}
4940
4941static unsigned int
ceb3a16c 4942nfs4_init_uniform_client_string(struct nfs_client *clp,
e984a55a
CL		 4943 char *buf, size_t len)
4944{
55b59293 4945 const char *nodename = clp->cl_rpcclient->cl_nodename;
ceb3a16c
TM		 4946 unsigned int result;
4947
4948 if (clp->cl_owner_id != NULL)
4949 return strlcpy(buf, clp->cl_owner_id, len);
6f2ea7f2
CL		 4950
4951 if (nfs4_client_id_uniquifier[0] != '\0')
ceb3a16c 4952 result = scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
55b59293
TM		 4953 clp->rpc_ops->version,
4954 clp->cl_minorversion,
4955 nfs4_client_id_uniquifier,
4956 nodename);
ceb3a16c
TM		 4957 else
4958 result = scnprintf(buf, len, "Linux NFSv%u.%u %s",
e984a55a 4959 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4960 nodename);
ceb3a16c
TM		 4961 clp->cl_owner_id = kstrdup(buf, GFP_KERNEL);
4962 return result;
e984a55a
CL		 4963}
4964
706cb8db
CL		 4965/*
4966 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
4967 * services. Advertise one based on the address family of the
4968 * clientaddr.
4969 */
4970static unsigned int
4971nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
4972{
4973 if (strchr(clp->cl_ipaddr, ':') != NULL)
4974 return scnprintf(buf, len, "tcp6");
4975 else
4976 return scnprintf(buf, len, "tcp");
4977}
4978
f11b2a1c
JL		 4979static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
4980{
4981 struct nfs4_setclientid *sc = calldata;
4982
4983 if (task->tk_status == 0)
4984 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
4985}
4986
4987static const struct rpc_call_ops nfs4_setclientid_ops = {
4988 .rpc_call_done = nfs4_setclientid_done,
4989};
4990
6bbb4ae8
CL		 4991/**
4992 * nfs4_proc_setclientid - Negotiate client ID
4993 * @clp: state data structure
4994 * @program: RPC program for NFSv4 callback service
4995 * @port: IP port number for NFS4 callback service
4996 * @cred: RPC credential to use for this call
4997 * @res: where to place the result
4998 *
4999 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5000 */
bb8b27e5
TM		 5001int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5002 unsigned short port, struct rpc_cred *cred,
5003 struct nfs4_setclientid_res *res)
1da177e4
LT		 5004{
5005 nfs4_verifier sc_verifier;
5006 struct nfs4_setclientid setclientid = {
5007 .sc_verifier = &sc_verifier,
5008 .sc_prog = program,
f4eecd5d 5009 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 5010 };
5011 struct rpc_message msg = {
5012 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5013 .rpc_argp = &setclientid,
bb8b27e5 5014 .rpc_resp = res,
286d7d6a 5015 .rpc_cred = cred,
1da177e4 5016 };
f11b2a1c
JL		 5017 struct rpc_task *task;
5018 struct rpc_task_setup task_setup_data = {
5019 .rpc_client = clp->cl_rpcclient,
5020 .rpc_message = &msg,
5021 .callback_ops = &nfs4_setclientid_ops,
5022 .callback_data = &setclientid,
5023 .flags = RPC_TASK_TIMEOUT,
5024 };
6bbb4ae8 5025 int status;
1da177e4 5026
de734831 5027 /* nfs_client_id4 */
f092075d 5028 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 5029 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5030 setclientid.sc_name_len =
5031 nfs4_init_uniform_client_string(clp,
5032 setclientid.sc_name,
5033 sizeof(setclientid.sc_name));
5034 else
5035 setclientid.sc_name_len =
5036 nfs4_init_nonuniform_client_string(clp,
5037 setclientid.sc_name,
5038 sizeof(setclientid.sc_name));
de734831 5039 /* cb_client4 */
706cb8db
CL		 5040 setclientid.sc_netid_len =
5041 nfs4_init_callback_netid(clp,
5042 setclientid.sc_netid,
5043 sizeof(setclientid.sc_netid));
de734831 5044 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5045 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5046 clp->cl_ipaddr, port >> 8, port & 255);
5047
6bbb4ae8
CL		 5048 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
5049 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5050 setclientid.sc_name_len, setclientid.sc_name);
f11b2a1c
JL		 5051 task = rpc_run_task(&task_setup_data);
5052 if (IS_ERR(task)) {
5053 status = PTR_ERR(task);
5054 goto out;
5055 }
5056 status = task->tk_status;
5057 if (setclientid.sc_cred) {
5058 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5059 put_rpccred(setclientid.sc_cred);
5060 }
5061 rpc_put_task(task);
5062out:
c6d01c6f 5063 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5064 dprintk("NFS reply setclientid: %d\n", status);
5065 return status;
1da177e4
LT		 5066}
5067
6bbb4ae8
CL		 5068/**
5069 * nfs4_proc_setclientid_confirm - Confirm client ID
5070 * @clp: state data structure
5071 * @res: result of a previous SETCLIENTID
5072 * @cred: RPC credential to use for this call
5073 *
5074 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5075 */
fd954ae1 5076int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5077 struct nfs4_setclientid_res *arg,
5078 struct rpc_cred *cred)
1da177e4 5079{
1da177e4
LT		 5080 struct rpc_message msg = {
5081 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5082 .rpc_argp = arg,
286d7d6a 5083 .rpc_cred = cred,
1da177e4 5084 };
1da177e4
LT		 5085 int status;
5086
6bbb4ae8
CL		 5087 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5088 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5089 clp->cl_clientid);
1bd714f2 5090 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5091 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5092 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5093 return status;
5094}
5095
fe650407
TM		 5096struct nfs4_delegreturndata {
5097 struct nfs4_delegreturnargs args;
fa178f29 5098 struct nfs4_delegreturnres res;
fe650407
TM		 5099 struct nfs_fh fh;
5100 nfs4_stateid stateid;
26e976a8 5101 unsigned long timestamp;
fa178f29 5102 struct nfs_fattr fattr;
fe650407 5103 int rpc_status;
039b756a
PT		 5104 struct inode *inode;
5105 bool roc;
5106 u32 roc_barrier;
fe650407
TM		 5107};
5108
fe650407
TM		 5109static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5110{
5111 struct nfs4_delegreturndata *data = calldata;
938e1010 5112
14516c3a
TM		 5113 if (!nfs4_sequence_done(task, &data->res.seq_res))
5114 return;
938e1010 5115
ca8acf8d 5116 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5117 switch (task->tk_status) {
79708861 5118 case 0:
fa178f29 5119 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5120 case -NFS4ERR_ADMIN_REVOKED:
5121 case -NFS4ERR_DELEG_REVOKED:
5122 case -NFS4ERR_BAD_STATEID:
5123 case -NFS4ERR_OLD_STATEID:
5124 case -NFS4ERR_STALE_STATEID:
5125 case -NFS4ERR_EXPIRED:
5126 task->tk_status = 0;
039b756a
PT		 5127 if (data->roc)
5128 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5129 break;
79708861 5130 default:
8478eaa1
N		 5131 if (nfs4_async_handle_error(task, data->res.server,
5132 NULL, NULL) == -EAGAIN) {
d00c5d43 5133 rpc_restart_call_prepare(task);
79708861
RL		 5134 return;
5135 }
5136 }
5137 data->rpc_status = task->tk_status;
fe650407
TM		 5138}
5139
5140static void nfs4_delegreturn_release(void *calldata)
5141{
039b756a
PT		 5142 struct nfs4_delegreturndata *data = calldata;
5143
5144 if (data->roc)
5145 pnfs_roc_release(data->inode);
fe650407
TM		 5146 kfree(calldata);
5147}
5148
938e1010
AA		 5149static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5150{
5151 struct nfs4_delegreturndata *d_data;
5152
5153 d_data = (struct nfs4_delegreturndata *)data;
5154
039b756a
PT		 5155 if (d_data->roc &&
5156 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5157 return;
5158
d9afbd1b
TM		 5159 nfs4_setup_sequence(d_data->res.server,
5160 &d_data->args.seq_args,
5161 &d_data->res.seq_res,
5162 task);
938e1010 5163}
938e1010 5164
c8d149f3 5165static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5166 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5167 .rpc_call_done = nfs4_delegreturn_done,
5168 .rpc_release = nfs4_delegreturn_release,
5169};
5170
e6f81075 5171static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5172{
5173 struct nfs4_delegreturndata *data;
fa178f29 5174 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5175 struct rpc_task *task;
5138fde0
TM		 5176 struct rpc_message msg = {
5177 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5178 .rpc_cred = cred,
5179 };
c970aa85
TM		 5180 struct rpc_task_setup task_setup_data = {
5181 .rpc_client = server->client,
5138fde0 5182 .rpc_message = &msg,
c970aa85
TM		 5183 .callback_ops = &nfs4_delegreturn_ops,
5184 .flags = RPC_TASK_ASYNC,
5185 };
e6f81075 5186 int status = 0;
fe650407 5187
8535b2be 5188 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5189 if (data == NULL)
5190 return -ENOMEM;
a9c92d6b 5191 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5192 data->args.fhandle = &data->fh;
5193 data->args.stateid = &data->stateid;
9e907fec 5194 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5195 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5196 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5197 data->res.fattr = &data->fattr;
5198 data->res.server = server;
5138fde0 5199 nfs_fattr_init(data->res.fattr);
26e976a8 5200 data->timestamp = jiffies;
fe650407 5201 data->rpc_status = 0;
039b756a
PT		 5202 data->inode = inode;
5203 data->roc = list_empty(&NFS_I(inode)->open_files) ?
5204 pnfs_roc(inode) : false;
fe650407 5205
c970aa85 5206 task_setup_data.callback_data = data;
1174dd1f
TM		 5207 msg.rpc_argp = &data->args;
5208 msg.rpc_resp = &data->res;
c970aa85 5209 task = rpc_run_task(&task_setup_data);
7a1218a2 5210 if (IS_ERR(task))
fe650407 5211 return PTR_ERR(task);
e6f81075
TM		 5212 if (!issync)
5213 goto out;
fe650407 5214 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5215 if (status != 0)
5216 goto out;
5217 status = data->rpc_status;
e144cbcc
TM		 5218 if (status == 0)
5219 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5220 else
5221 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5222out:
e6b3c4db 5223 rpc_put_task(task);
fe650407 5224 return status;
1da177e4
LT		 5225}
5226
e6f81075 5227int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5228{
5229 struct nfs_server *server = NFS_SERVER(inode);
5230 struct nfs4_exception exception = { };
5231 int err;
5232 do {
e6f81075 5233 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5234 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5235 switch (err) {
5236 case -NFS4ERR_STALE_STATEID:
5237 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5238 case 0:
5239 return 0;
5240 }
5241 err = nfs4_handle_exception(server, err, &exception);
5242 } while (exception.retry);
5243 return err;
5244}
5245
5246#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5247#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5248
5249/*
5250 * sleep, with exponential backoff, and retry the LOCK operation.
5251 */
5252static unsigned long
5253nfs4_set_lock_task_retry(unsigned long timeout)
5254{
416ad3c9 5255 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5256 timeout <<= 1;
5257 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5258 return NFS4_LOCK_MAXTIMEOUT;
5259 return timeout;
5260}
5261
1da177e4
LT		 5262static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5263{
5264 struct inode *inode = state->inode;
5265 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5266 struct nfs_client *clp = server->nfs_client;
911d1aaf 5267 struct nfs_lockt_args arg = {
1da177e4 5268 .fh = NFS_FH(inode),
911d1aaf 5269 .fl = request,
1da177e4 5270 };
911d1aaf
TM		 5271 struct nfs_lockt_res res = {
5272 .denied = request,
1da177e4
LT		 5273 };
5274 struct rpc_message msg = {
5275 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5276 .rpc_argp = &arg,
5277 .rpc_resp = &res,
5278 .rpc_cred = state->owner->so_cred,
5279 };
1da177e4
LT		 5280 struct nfs4_lock_state *lsp;
5281 int status;
5282
911d1aaf 5283 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5284 status = nfs4_set_lock_state(state, request);
5285 if (status != 0)
5286 goto out;
5287 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5288 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5289 arg.lock_owner.s_dev = server->s_dev;
7c513058 5290 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5291 switch (status) {
5292 case 0:
5293 request->fl_type = F_UNLCK;
5294 break;
5295 case -NFS4ERR_DENIED:
5296 status = 0;
1da177e4 5297 }
70cc6487 5298 request->fl_ops->fl_release_private(request);
a6f951dd 5299 request->fl_ops = NULL;
8d0a8a9d 5300out:
1da177e4
LT		 5301 return status;
5302}
5303
5304static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5305{
5306 struct nfs4_exception exception = { };
5307 int err;
5308
5309 do {
d1b748a5
TM		 5310 err = _nfs4_proc_getlk(state, cmd, request);
5311 trace_nfs4_get_lock(request, state, cmd, err);
5312 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5313 &exception);
5314 } while (exception.retry);
5315 return err;
5316}
5317
5318static int do_vfs_lock(struct file *file, struct file_lock *fl)
5319{
5320 int res = 0;
5321 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5322 case FL_POSIX:
5323 res = posix_lock_file_wait(file, fl);
5324 break;
5325 case FL_FLOCK:
5326 res = flock_lock_file_wait(file, fl);
5327 break;
5328 default:
5329 BUG();
5330 }
1da177e4
LT		 5331 return res;
5332}
5333
faf5f49c 5334struct nfs4_unlockdata {
911d1aaf
TM		 5335 struct nfs_locku_args arg;
5336 struct nfs_locku_res res;
faf5f49c
TM		 5337 struct nfs4_lock_state *lsp;
5338 struct nfs_open_context *ctx;
911d1aaf
TM		 5339 struct file_lock fl;
5340 const struct nfs_server *server;
26e976a8 5341 unsigned long timestamp;
faf5f49c
TM		 5342};
5343
911d1aaf
TM		 5344static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5345 struct nfs_open_context *ctx,
5346 struct nfs4_lock_state *lsp,
5347 struct nfs_seqid *seqid)
5348{
5349 struct nfs4_unlockdata *p;
5350 struct inode *inode = lsp->ls_state->inode;
5351
8535b2be 5352 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5353 if (p == NULL)
5354 return NULL;
5355 p->arg.fh = NFS_FH(inode);
5356 p->arg.fl = &p->fl;
5357 p->arg.seqid = seqid;
c1d51931 5358 p->res.seqid = seqid;
911d1aaf
TM		 5359 p->arg.stateid = &lsp->ls_stateid;
5360 p->lsp = lsp;
5361 atomic_inc(&lsp->ls_count);
5362 /* Ensure we don't close file until we're done freeing locks! */
5363 p->ctx = get_nfs_open_context(ctx);
5364 memcpy(&p->fl, fl, sizeof(p->fl));
5365 p->server = NFS_SERVER(inode);
5366 return p;
5367}
5368
06f814a3 5369static void nfs4_locku_release_calldata(void *data)
faf5f49c 5370{
963d8fe5 5371 struct nfs4_unlockdata *calldata = data;
911d1aaf 5372 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5373 nfs4_put_lock_state(calldata->lsp);
5374 put_nfs_open_context(calldata->ctx);
5375 kfree(calldata);
faf5f49c
TM		 5376}
5377
963d8fe5 5378static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5379{
963d8fe5 5380 struct nfs4_unlockdata *calldata = data;
faf5f49c 5381
14516c3a
TM		 5382 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5383 return;
faf5f49c
TM		 5384 switch (task->tk_status) {
5385 case 0:
f597c537
TM		 5386 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5387 &calldata->res.stateid);
26e976a8 5388 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5389 break;
9e33bed5
TM		 5390 case -NFS4ERR_BAD_STATEID:
5391 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5392 case -NFS4ERR_STALE_STATEID:
5393 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5394 break;
5395 default:
8478eaa1
N		 5396 if (nfs4_async_handle_error(task, calldata->server,
5397 NULL, NULL) == -EAGAIN)
d00c5d43 5398 rpc_restart_call_prepare(task);
faf5f49c 5399 }
2b1bc308 5400 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5401}
5402
4ce70ada 5403static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5404{
4ce70ada 5405 struct nfs4_unlockdata *calldata = data;
faf5f49c 5406
911d1aaf 5407 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5408 goto out_wait;
795a88c9 5409 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5410 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5411 goto out_no_action;
faf5f49c 5412 }
26e976a8 5413 calldata->timestamp = jiffies;
035168ab 5414 if (nfs4_setup_sequence(calldata->server,
a893693c 5415 &calldata->arg.seq_args,
2240a9e2
TM		 5416 &calldata->res.seq_res,
5417 task) != 0)
5418 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5419 return;
5420out_no_action:
5421 task->tk_action = NULL;
5422out_wait:
5423 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5424}
5425
963d8fe5 5426static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5427 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5428 .rpc_call_done = nfs4_locku_done,
06f814a3 5429 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5430};
5431
a5d16a4d
TM		 5432static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5433 struct nfs_open_context *ctx,
5434 struct nfs4_lock_state *lsp,
5435 struct nfs_seqid *seqid)
5436{
5437 struct nfs4_unlockdata *data;
5138fde0
TM		 5438 struct rpc_message msg = {
5439 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5440 .rpc_cred = ctx->cred,
5441 };
c970aa85
TM		 5442 struct rpc_task_setup task_setup_data = {
5443 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5444 .rpc_message = &msg,
c970aa85 5445 .callback_ops = &nfs4_locku_ops,
101070ca 5446 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5447 .flags = RPC_TASK_ASYNC,
5448 };
a5d16a4d 5449
fa940720
WAA		 5450 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5451 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5452
137d6aca
FF		 5453 /* Ensure this is an unlock - when canceling a lock, the
5454 * canceled lock is passed in, and it won't be an unlock.
5455 */
5456 fl->fl_type = F_UNLCK;
5457
a5d16a4d
TM		 5458 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5459 if (data == NULL) {
5460 nfs_free_seqid(seqid);
5461 return ERR_PTR(-ENOMEM);
5462 }
5463
a9c92d6b 5464 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5465 msg.rpc_argp = &data->arg;
5466 msg.rpc_resp = &data->res;
c970aa85
TM		 5467 task_setup_data.callback_data = data;
5468 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5469}
5470
faf5f49c
TM		 5471static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5472{
65b62a29
TM		 5473 struct inode *inode = state->inode;
5474 struct nfs4_state_owner *sp = state->owner;
5475 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5476 struct nfs_seqid *seqid;
1da177e4 5477 struct nfs4_lock_state *lsp;
06f814a3
TM		 5478 struct rpc_task *task;
5479 int status = 0;
536ff0f8 5480 unsigned char fl_flags = request->fl_flags;
faf5f49c 5481
8d0a8a9d 5482 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5483 /* Unlock _before_ we do the RPC call */
5484 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5485 /* Exclude nfs_delegation_claim_locks() */
5486 mutex_lock(&sp->so_delegreturn_mutex);
5487 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5488 down_read(&nfsi->rwsem);
5489 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5490 up_read(&nfsi->rwsem);
65b62a29 5491 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5492 goto out;
19e03c57
TM		 5493 }
5494 up_read(&nfsi->rwsem);
65b62a29 5495 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5496 if (status != 0)
9b073574
TM		 5497 goto out;
5498 /* Is this a delegated lock? */
8d0a8a9d 5499 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5500 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5501 goto out;
8535b2be 5502 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5503 status = -ENOMEM;
911d1aaf 5504 if (seqid == NULL)
9b073574 5505 goto out;
cd3758e3 5506 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5507 status = PTR_ERR(task);
5508 if (IS_ERR(task))
9b073574 5509 goto out;
a5d16a4d 5510 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5511 rpc_put_task(task);
9b073574 5512out:
536ff0f8 5513 request->fl_flags = fl_flags;
d1b748a5 5514 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5515 return status;
5516}
5517
a5d16a4d
TM		 5518struct nfs4_lockdata {
5519 struct nfs_lock_args arg;
5520 struct nfs_lock_res res;
5521 struct nfs4_lock_state *lsp;
5522 struct nfs_open_context *ctx;
5523 struct file_lock fl;
26e976a8 5524 unsigned long timestamp;
a5d16a4d
TM		 5525 int rpc_status;
5526 int cancelled;
66179efe 5527 struct nfs_server *server;
a5d16a4d
TM		 5528};
5529
5530static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5531 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5532 gfp_t gfp_mask)
1da177e4 5533{
a5d16a4d
TM		 5534 struct nfs4_lockdata *p;
5535 struct inode *inode = lsp->ls_state->inode;
1da177e4 5536 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5537
8535b2be 5538 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5539 if (p == NULL)
5540 return NULL;
5541
5542 p->arg.fh = NFS_FH(inode);
5543 p->arg.fl = &p->fl;
8535b2be 5544 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5545 if (p->arg.open_seqid == NULL)
5546 goto out_free;
8535b2be 5547 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5548 if (p->arg.lock_seqid == NULL)
2f74c0a0 5549 goto out_free_seqid;
a5d16a4d 5550 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5551 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5552 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5553 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5554 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5555 p->lsp = lsp;
66179efe 5556 p->server = server;
a5d16a4d
TM		 5557 atomic_inc(&lsp->ls_count);
5558 p->ctx = get_nfs_open_context(ctx);
5559 memcpy(&p->fl, fl, sizeof(p->fl));
5560 return p;
2f74c0a0
TM		 5561out_free_seqid:
5562 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5563out_free:
5564 kfree(p);
5565 return NULL;
5566}
5567
5568static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5569{
5570 struct nfs4_lockdata *data = calldata;
5571 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5572
3110ff80 5573 dprintk("%s: begin!\n", __func__);
2f74c0a0 5574 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5575 goto out_wait;
a5d16a4d
TM		 5576 /* Do we need to do an open_to_lock_owner? */
5577 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5578 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5579 goto out_release_lock_seqid;
8fe72bac 5580 }
8e472f33 5581 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5582 data->arg.new_lock_owner = 1;
c1d51931 5583 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5584 } else
5585 data->arg.new_lock_owner = 0;
5d422301
TM		 5586 if (!nfs4_valid_open_stateid(state)) {
5587 data->rpc_status = -EBADF;
5588 task->tk_action = NULL;
5589 goto out_release_open_seqid;
5590 }
26e976a8 5591 data->timestamp = jiffies;
035168ab
TM		 5592 if (nfs4_setup_sequence(data->server,
5593 &data->arg.seq_args,
2240a9e2 5594 &data->res.seq_res,
d9afbd1b 5595 task) == 0)
66179efe 5596 return;
5d422301 5597out_release_open_seqid:
2240a9e2
TM		 5598 nfs_release_seqid(data->arg.open_seqid);
5599out_release_lock_seqid:
5600 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5601out_wait:
5602 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5603 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5604}
5605
a5d16a4d
TM		 5606static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5607{
5608 struct nfs4_lockdata *data = calldata;
5609
3110ff80 5610 dprintk("%s: begin!\n", __func__);
a5d16a4d 5611
14516c3a
TM		 5612 if (!nfs4_sequence_done(task, &data->res.seq_res))
5613 return;
66179efe 5614
a5d16a4d 5615 data->rpc_status = task->tk_status;
a5d16a4d 5616 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5617 if (data->rpc_status == 0)
5618 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5619 else
5620 goto out;
5621 }
5622 if (data->rpc_status == 0) {
f597c537 5623 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5624 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5625 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5626 }
a5d16a4d 5627out:
3110ff80 5628 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5629}
5630
5631static void nfs4_lock_release(void *calldata)
5632{
5633 struct nfs4_lockdata *data = calldata;
5634
3110ff80 5635 dprintk("%s: begin!\n", __func__);
2f74c0a0 5636 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5637 if (data->cancelled != 0) {
5638 struct rpc_task *task;
5639 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5640 data->arg.lock_seqid);
5641 if (!IS_ERR(task))
bf294b41 5642 rpc_put_task_async(task);
3110ff80 5643 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5644 } else
5645 nfs_free_seqid(data->arg.lock_seqid);
5646 nfs4_put_lock_state(data->lsp);
5647 put_nfs_open_context(data->ctx);
5648 kfree(data);
3110ff80 5649 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5650}
5651
5652static const struct rpc_call_ops nfs4_lock_ops = {
5653 .rpc_call_prepare = nfs4_lock_prepare,
5654 .rpc_call_done = nfs4_lock_done,
5655 .rpc_release = nfs4_lock_release,
5656};
5657
2bee72a6
TM		 5658static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5659{
2bee72a6
TM		 5660 switch (error) {
5661 case -NFS4ERR_ADMIN_REVOKED:
5662 case -NFS4ERR_BAD_STATEID:
ecac799a 5663 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5664 if (new_lock_owner != 0 ||
795a88c9 5665 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5666 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5667 break;
5668 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5669 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5670 case -NFS4ERR_EXPIRED:
5671 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5672 };
5673}
5674
afe6c27c 5675static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5676{
5677 struct nfs4_lockdata *data;
5678 struct rpc_task *task;
5138fde0
TM		 5679 struct rpc_message msg = {
5680 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5681 .rpc_cred = state->owner->so_cred,
5682 };
c970aa85
TM		 5683 struct rpc_task_setup task_setup_data = {
5684 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5685 .rpc_message = &msg,
c970aa85 5686 .callback_ops = &nfs4_lock_ops,
101070ca 5687 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5688 .flags = RPC_TASK_ASYNC,
5689 };
a5d16a4d
TM		 5690 int ret;
5691
3110ff80 5692 dprintk("%s: begin!\n", __func__);
cd3758e3 5693 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5694 fl->fl_u.nfs4_fl.owner,
5695 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5696 if (data == NULL)
5697 return -ENOMEM;
5698 if (IS_SETLKW(cmd))
5699 data->arg.block = 1;
a9c92d6b 5700 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5701 msg.rpc_argp = &data->arg;
5702 msg.rpc_resp = &data->res;
c970aa85 5703 task_setup_data.callback_data = data;
8fe72bac
TM		 5704 if (recovery_type > NFS_LOCK_NEW) {
5705 if (recovery_type == NFS_LOCK_RECLAIM)
5706 data->arg.reclaim = NFS_LOCK_RECLAIM;
5707 nfs4_set_sequence_privileged(&data->arg.seq_args);
5708 }
c970aa85 5709 task = rpc_run_task(&task_setup_data);
7a1218a2 5710 if (IS_ERR(task))
a5d16a4d 5711 return PTR_ERR(task);
a5d16a4d
TM		 5712 ret = nfs4_wait_for_completion_rpc_task(task);
5713 if (ret == 0) {
5714 ret = data->rpc_status;
2bee72a6
TM		 5715 if (ret)
5716 nfs4_handle_setlk_error(data->server, data->lsp,
5717 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5718 } else
5719 data->cancelled = 1;
e6b3c4db 5720 rpc_put_task(task);
3110ff80 5721 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5722 return ret;
1da177e4
LT		 5723}
5724
5725static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5726{
202b50dc 5727 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5728 struct nfs4_exception exception = {
5729 .inode = state->inode,
5730 };
202b50dc
TM		 5731 int err;
5732
5733 do {
42a2d13e
TM		 5734 /* Cache the lock if possible... */
5735 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5736 return 0;
afe6c27c 5737 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5738 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5739 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5740 break;
5741 nfs4_handle_exception(server, err, &exception);
5742 } while (exception.retry);
5743 return err;
1da177e4
LT		 5744}
5745
5746static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5747{
202b50dc 5748 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5749 struct nfs4_exception exception = {
5750 .inode = state->inode,
5751 };
202b50dc
TM		 5752 int err;
5753
6bfc93ef
TM		 5754 err = nfs4_set_lock_state(state, request);
5755 if (err != 0)
5756 return err;
f6de7a39 5757 if (!recover_lost_locks) {
ef1820f9
N		 5758 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5759 return 0;
5760 }
202b50dc 5761 do {
42a2d13e
TM		 5762 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5763 return 0;
afe6c27c 5764 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5765 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5766 switch (err) {
5767 default:
5768 goto out;
5769 case -NFS4ERR_GRACE:
5770 case -NFS4ERR_DELAY:
5771 nfs4_handle_exception(server, err, &exception);
5772 err = 0;
5773 }
202b50dc 5774 } while (exception.retry);
a9ed2e25 5775out:
202b50dc 5776 return err;
1da177e4
LT		 5777}
5778
f062eb6c 5779#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5780/**
5781 * nfs41_check_expired_locks - possibly free a lock stateid
5782 *
5783 * @state: NFSv4 state for an inode
5784 *
5785 * Returns NFS_OK if recovery for this stateid is now finished.
5786 * Otherwise a negative NFS4ERR value is returned.
5787 */
b01dd1d8 5788static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5789{
eb64cf96 5790 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5791 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5792 struct nfs_server *server = NFS_SERVER(state->inode);
5793
b01dd1d8 5794 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5795 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5796 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5797
5798 status = nfs41_test_stateid(server,
5799 &lsp->ls_stateid,
5800 cred);
08cb47fa 5801 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5802 if (status != NFS_OK) {
3e60ffdd
CL		 5803 /* Free the stateid unless the server
5804 * informs us the stateid is unrecognized. */
89af2739
CL		 5805 if (status != -NFS4ERR_BAD_STATEID)
5806 nfs41_free_stateid(server,
ab7cb0df
TM		 5807 &lsp->ls_stateid,
5808 cred);
795a88c9 5809 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5810 ret = status;
5811 }
5812 }
5813 };
5814
5815 return ret;
5816}
5817
5818static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5819{
5820 int status = NFS_OK;
5821
5822 if (test_bit(LK_STATE_IN_USE, &state->flags))
5823 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5824 if (status != NFS_OK)
5825 status = nfs4_lock_expired(state, request);
5826 return status;
f062eb6c
BS		 5827}
5828#endif
5829
1da177e4
LT		 5830static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5831{
9a99af49 5832 struct nfs4_state_owner *sp = state->owner;
19e03c57 5833 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5834 unsigned char fl_flags = request->fl_flags;
9a99af49 5835 unsigned int seq;
8e469ebd 5836 int status = -ENOLCK;
1da177e4 5837
8e469ebd
TM		 5838 if ((fl_flags & FL_POSIX) &&
5839 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5840 goto out;
6bfc93ef 5841 /* Is this a delegated open? */
6bfc93ef
TM		 5842 status = nfs4_set_lock_state(state, request);
5843 if (status != 0)
5844 goto out;
01c3b861
TM		 5845 request->fl_flags |= FL_ACCESS;
5846 status = do_vfs_lock(request->fl_file, request);
5847 if (status < 0)
5848 goto out;
19e03c57 5849 down_read(&nfsi->rwsem);
01c3b861 5850 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5851 /* Yes: cache locks! */
01c3b861 5852 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5853 request->fl_flags = fl_flags & ~FL_SLEEP;
5854 status = do_vfs_lock(request->fl_file, request);
5855 goto out_unlock;
01c3b861 5856 }
9a99af49
TM		 5857 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5858 up_read(&nfsi->rwsem);
afe6c27c 5859 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5860 if (status != 0)
9a99af49
TM		 5861 goto out;
5862 down_read(&nfsi->rwsem);
5863 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5864 status = -NFS4ERR_DELAY;
01c3b861 5865 goto out_unlock;
9a99af49 5866 }
6bfc93ef 5867 /* Note: we always want to sleep here! */
01c3b861 5868 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5869 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5870 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5871 "manager!\n", __func__);
01c3b861 5872out_unlock:
19e03c57 5873 up_read(&nfsi->rwsem);
01c3b861
TM		 5874out:
5875 request->fl_flags = fl_flags;
1da177e4
LT		 5876 return status;
5877}
5878
5879static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5880{
a1d0b5ee
TM		 5881 struct nfs4_exception exception = {
5882 .state = state,
05ffe24f 5883 .inode = state->inode,
a1d0b5ee 5884 };
1da177e4
LT		 5885 int err;
5886
5887 do {
965b5d67 5888 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5889 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5890 if (err == -NFS4ERR_DENIED)
5891 err = -EAGAIN;
1da177e4 5892 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5893 err, &exception);
1da177e4
LT		 5894 } while (exception.retry);
5895 return err;
5896}
5897
5898static int
5899nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5900{
5901 struct nfs_open_context *ctx;
5902 struct nfs4_state *state;
5903 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5904 int status;
5905
5906 /* verify open state */
cd3758e3 5907 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5908 state = ctx->state;
5909
5910 if (request->fl_start < 0 || request->fl_end < 0)
5911 return -EINVAL;
5912
d953126a
TM		 5913 if (IS_GETLK(cmd)) {
5914 if (state != NULL)
5915 return nfs4_proc_getlk(state, F_GETLK, request);
5916 return 0;
5917 }
1da177e4
LT		 5918
5919 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5920 return -EINVAL;
5921
d953126a
TM		 5922 if (request->fl_type == F_UNLCK) {
5923 if (state != NULL)
5924 return nfs4_proc_unlck(state, cmd, request);
5925 return 0;
5926 }
1da177e4 5927
d953126a
TM		 5928 if (state == NULL)
5929 return -ENOLCK;
55725513
TM		 5930 /*
5931 * Don't rely on the VFS having checked the file open mode,
5932 * since it won't do this for flock() locks.
5933 */
f44106e2 5934 switch (request->fl_type) {
55725513
TM		 5935 case F_RDLCK:
5936 if (!(filp->f_mode & FMODE_READ))
5937 return -EBADF;
5938 break;
5939 case F_WRLCK:
5940 if (!(filp->f_mode & FMODE_WRITE))
5941 return -EBADF;
5942 }
5943
1da177e4
LT		 5944 do {
5945 status = nfs4_proc_setlk(state, cmd, request);
5946 if ((status != -EAGAIN) || IS_SETLK(cmd))
5947 break;
5948 timeout = nfs4_set_lock_task_retry(timeout);
5949 status = -ERESTARTSYS;
5950 if (signalled())
5951 break;
5952 } while(status < 0);
1da177e4
LT		 5953 return status;
5954}
5955
db4f2e63 5956int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5957{
5958 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5959 int err;
5960
5961 err = nfs4_set_lock_state(state, fl);
5962 if (err != 0)
db4f2e63 5963 return err;
4a706fa0 5964 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5965 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5966}
6b3b5496 5967
cf470c3e
TM		 5968struct nfs_release_lockowner_data {
5969 struct nfs4_lock_state *lsp;
5ae67c4f 5970 struct nfs_server *server;
cf470c3e 5971 struct nfs_release_lockowner_args args;
b7e63a10 5972 struct nfs_release_lockowner_res res;
60ea6812 5973 unsigned long timestamp;
cf470c3e
TM		 5974};
5975
fbd4bfd1
CL		 5976static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5977{
5978 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 5979 struct nfs_server *server = data->server;
cb04ad2a
PT		 5980 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
5981 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 5982 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 5983 data->timestamp = jiffies;
fbd4bfd1
CL		 5984}
5985
5986static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5987{
5988 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 5989 struct nfs_server *server = data->server;
5990
b7e63a10 5991 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 5992
5993 switch (task->tk_status) {
5994 case 0:
5995 renew_lease(server, data->timestamp);
5996 break;
5997 case -NFS4ERR_STALE_CLIENTID:
5998 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 5999 nfs4_schedule_lease_recovery(server->nfs_client);
6000 break;
60ea6812
CL		 6001 case -NFS4ERR_LEASE_MOVED:
6002 case -NFS4ERR_DELAY:
8478eaa1
N		 6003 if (nfs4_async_handle_error(task, server,
6004 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6005 rpc_restart_call_prepare(task);
6006 }
fbd4bfd1
CL		 6007}
6008
d3c7b7cc
TM		 6009static void nfs4_release_lockowner_release(void *calldata)
6010{
cf470c3e 6011 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6012 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6013 kfree(calldata);
6014}
6015
17280175 6016static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6017 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6018 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6019 .rpc_release = nfs4_release_lockowner_release,
6020};
6021
f1cdae87
JL		 6022static void
6023nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6024{
cf470c3e 6025 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6026 struct rpc_message msg = {
6027 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6028 };
6029
6030 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6031 return;
fbd4bfd1 6032
cf470c3e
TM		 6033 data = kmalloc(sizeof(*data), GFP_NOFS);
6034 if (!data)
f1cdae87 6035 return;
cf470c3e 6036 data->lsp = lsp;
5ae67c4f 6037 data->server = server;
cf470c3e
TM		 6038 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6039 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6040 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6041
cf470c3e 6042 msg.rpc_argp = &data->args;
b7e63a10
TM		 6043 msg.rpc_resp = &data->res;
6044 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6045 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6046}
6047
aa1870af
BF		 6048#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6049
64c2ce8b
AK		 6050static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6051 const void *buf, size_t buflen,
6052 int flags, int type)
6b3b5496 6053{
64c2ce8b
AK		 6054 if (strcmp(key, "") != 0)
6055 return -EINVAL;
4b580ee3 6056
64c2ce8b 6057 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6058}
6059
64c2ce8b
AK		 6060static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6061 void *buf, size_t buflen, int type)
6b3b5496 6062{
64c2ce8b
AK		 6063 if (strcmp(key, "") != 0)
6064 return -EINVAL;
aa1870af 6065
64c2ce8b 6066 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6067}
6068
64c2ce8b
AK		 6069static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6070 size_t list_len, const char *name,
6071 size_t name_len, int type)
6b3b5496 6072{
64c2ce8b 6073 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6074
096455a2
BF		 6075 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
6076 return 0;
64c2ce8b
AK		 6077
6078 if (list && len <= list_len)
6079 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6080 return len;
6b3b5496
BF		 6081}
6082
c9bccef6
DQ		 6083#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6084static inline int nfs4_server_supports_labels(struct nfs_server *server)
6085{
6086 return server->caps & NFS_CAP_SECURITY_LABEL;
6087}
6088
6089static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6090 const void *buf, size_t buflen,
6091 int flags, int type)
6092{
6093 if (security_ismaclabel(key))
6094 return nfs4_set_security_label(dentry, buf, buflen);
6095
6096 return -EOPNOTSUPP;
6097}
6098
6099static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6100 void *buf, size_t buflen, int type)
6101{
6102 if (security_ismaclabel(key))
6103 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
6104 return -EOPNOTSUPP;
6105}
6106
6107static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6108 size_t list_len, const char *name,
6109 size_t name_len, int type)
6110{
6111 size_t len = 0;
6112
6113 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
6114 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
6115 if (list && len <= list_len)
6116 security_inode_listsecurity(dentry->d_inode, list, len);
6117 }
6118 return len;
6119}
6120
6121static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6122 .prefix = XATTR_SECURITY_PREFIX,
6123 .list = nfs4_xattr_list_nfs4_label,
6124 .get = nfs4_xattr_get_nfs4_label,
6125 .set = nfs4_xattr_set_nfs4_label,
6126};
6127#endif
6128
6129
533eb461
AA		 6130/*
6131 * nfs_fhget will use either the mounted_on_fileid or the fileid
6132 */
69aaaae1
TM		 6133static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6134{
533eb461
AA		 6135 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6136 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6137 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6138 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6139 return;
6140
6141 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6142 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6143 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6144 fattr->nlink = 2;
6145}
6146
f05d147f
BS		 6147static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6148 const struct qstr *name,
6149 struct nfs4_fs_locations *fs_locations,
6150 struct page *page)
683b57b4
TM		 6151{
6152 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6153 u32 bitmask[3] = {
361e624f 6154 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6155 };
6156 struct nfs4_fs_locations_arg args = {
6157 .dir_fh = NFS_FH(dir),
c228fd3a 6158 .name = name,
683b57b4
TM		 6159 .page = page,
6160 .bitmask = bitmask,
6161 };
22958463
BH		 6162 struct nfs4_fs_locations_res res = {
6163 .fs_locations = fs_locations,
6164 };
683b57b4
TM		 6165 struct rpc_message msg = {
6166 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6167 .rpc_argp = &args,
22958463 6168 .rpc_resp = &res,
683b57b4
TM		 6169 };
6170 int status;
6171
3110ff80 6172 dprintk("%s: start\n", __func__);
533eb461
AA		 6173
6174 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6175 * is not supported */
6176 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6177 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6178 else
6179 bitmask[0] |= FATTR4_WORD0_FILEID;
6180
c228fd3a 6181 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6182 fs_locations->server = server;
830b8e33 6183 fs_locations->nlocations = 0;
f05d147f 6184 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6185 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6186 return status;
6187}
6188
f05d147f
BS		 6189int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6190 const struct qstr *name,
6191 struct nfs4_fs_locations *fs_locations,
6192 struct page *page)
db0a9593
BS		 6193{
6194 struct nfs4_exception exception = { };
6195 int err;
6196 do {
078ea3df
TM		 6197 err = _nfs4_proc_fs_locations(client, dir, name,
6198 fs_locations, page);
6199 trace_nfs4_get_fs_locations(dir, name, err);
6200 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6201 &exception);
6202 } while (exception.retry);
6203 return err;
6204}
6205
b03d735b
CL		 6206/*
6207 * This operation also signals the server that this client is
6208 * performing migration recovery. The server can stop returning
6209 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6210 * appended to this compound to identify the client ID which is
6211 * performing recovery.
6212 */
6213static int _nfs40_proc_get_locations(struct inode *inode,
6214 struct nfs4_fs_locations *locations,
6215 struct page *page, struct rpc_cred *cred)
6216{
6217 struct nfs_server *server = NFS_SERVER(inode);
6218 struct rpc_clnt *clnt = server->client;
6219 u32 bitmask[2] = {
6220 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6221 };
6222 struct nfs4_fs_locations_arg args = {
6223 .clientid = server->nfs_client->cl_clientid,
6224 .fh = NFS_FH(inode),
6225 .page = page,
6226 .bitmask = bitmask,
6227 .migration = 1, /* skip LOOKUP */
6228 .renew = 1, /* append RENEW */
6229 };
6230 struct nfs4_fs_locations_res res = {
6231 .fs_locations = locations,
6232 .migration = 1,
6233 .renew = 1,
6234 };
6235 struct rpc_message msg = {
6236 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6237 .rpc_argp = &args,
6238 .rpc_resp = &res,
6239 .rpc_cred = cred,
6240 };
6241 unsigned long now = jiffies;
6242 int status;
6243
6244 nfs_fattr_init(&locations->fattr);
6245 locations->server = server;
6246 locations->nlocations = 0;
6247
6248 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6249 nfs4_set_sequence_privileged(&args.seq_args);
6250 status = nfs4_call_sync_sequence(clnt, server, &msg,
6251 &args.seq_args, &res.seq_res);
6252 if (status)
6253 return status;
6254
6255 renew_lease(server, now);
6256 return 0;
6257}
6258
6259#ifdef CONFIG_NFS_V4_1
6260
6261/*
6262 * This operation also signals the server that this client is
6263 * performing migration recovery. The server can stop asserting
6264 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6265 * performing this operation is identified in the SEQUENCE
6266 * operation in this compound.
6267 *
6268 * When the client supports GETATTR(fs_locations_info), it can
6269 * be plumbed in here.
6270 */
6271static int _nfs41_proc_get_locations(struct inode *inode,
6272 struct nfs4_fs_locations *locations,
6273 struct page *page, struct rpc_cred *cred)
6274{
6275 struct nfs_server *server = NFS_SERVER(inode);
6276 struct rpc_clnt *clnt = server->client;
6277 u32 bitmask[2] = {
6278 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6279 };
6280 struct nfs4_fs_locations_arg args = {
6281 .fh = NFS_FH(inode),
6282 .page = page,
6283 .bitmask = bitmask,
6284 .migration = 1, /* skip LOOKUP */
6285 };
6286 struct nfs4_fs_locations_res res = {
6287 .fs_locations = locations,
6288 .migration = 1,
6289 };
6290 struct rpc_message msg = {
6291 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6292 .rpc_argp = &args,
6293 .rpc_resp = &res,
6294 .rpc_cred = cred,
6295 };
6296 int status;
6297
6298 nfs_fattr_init(&locations->fattr);
6299 locations->server = server;
6300 locations->nlocations = 0;
6301
6302 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6303 nfs4_set_sequence_privileged(&args.seq_args);
6304 status = nfs4_call_sync_sequence(clnt, server, &msg,
6305 &args.seq_args, &res.seq_res);
6306 if (status == NFS4_OK &&
6307 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6308 status = -NFS4ERR_LEASE_MOVED;
6309 return status;
6310}
6311
6312#endif /* CONFIG_NFS_V4_1 */
6313
6314/**
6315 * nfs4_proc_get_locations - discover locations for a migrated FSID
6316 * @inode: inode on FSID that is migrating
6317 * @locations: result of query
6318 * @page: buffer
6319 * @cred: credential to use for this operation
6320 *
6321 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6322 * operation failed, or a negative errno if a local error occurred.
6323 *
6324 * On success, "locations" is filled in, but if the server has
6325 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6326 * asserted.
6327 *
6328 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6329 * from this client that require migration recovery.
6330 */
6331int nfs4_proc_get_locations(struct inode *inode,
6332 struct nfs4_fs_locations *locations,
6333 struct page *page, struct rpc_cred *cred)
6334{
6335 struct nfs_server *server = NFS_SERVER(inode);
6336 struct nfs_client *clp = server->nfs_client;
6337 const struct nfs4_mig_recovery_ops *ops =
6338 clp->cl_mvops->mig_recovery_ops;
6339 struct nfs4_exception exception = { };
6340 int status;
6341
6342 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6343 (unsigned long long)server->fsid.major,
6344 (unsigned long long)server->fsid.minor,
6345 clp->cl_hostname);
6346 nfs_display_fhandle(NFS_FH(inode), __func__);
6347
6348 do {
6349 status = ops->get_locations(inode, locations, page, cred);
6350 if (status != -NFS4ERR_DELAY)
6351 break;
6352 nfs4_handle_exception(server, status, &exception);
6353 } while (exception.retry);
6354 return status;
6355}
6356
44c99933
CL		 6357/*
6358 * This operation also signals the server that this client is
6359 * performing "lease moved" recovery. The server can stop
6360 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6361 * is appended to this compound to identify the client ID which is
6362 * performing recovery.
6363 */
6364static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6365{
6366 struct nfs_server *server = NFS_SERVER(inode);
6367 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6368 struct rpc_clnt *clnt = server->client;
6369 struct nfs4_fsid_present_arg args = {
6370 .fh = NFS_FH(inode),
6371 .clientid = clp->cl_clientid,
6372 .renew = 1, /* append RENEW */
6373 };
6374 struct nfs4_fsid_present_res res = {
6375 .renew = 1,
6376 };
6377 struct rpc_message msg = {
6378 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6379 .rpc_argp = &args,
6380 .rpc_resp = &res,
6381 .rpc_cred = cred,
6382 };
6383 unsigned long now = jiffies;
6384 int status;
6385
6386 res.fh = nfs_alloc_fhandle();
6387 if (res.fh == NULL)
6388 return -ENOMEM;
6389
6390 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6391 nfs4_set_sequence_privileged(&args.seq_args);
6392 status = nfs4_call_sync_sequence(clnt, server, &msg,
6393 &args.seq_args, &res.seq_res);
6394 nfs_free_fhandle(res.fh);
6395 if (status)
6396 return status;
6397
6398 do_renew_lease(clp, now);
6399 return 0;
6400}
6401
6402#ifdef CONFIG_NFS_V4_1
6403
6404/*
6405 * This operation also signals the server that this client is
6406 * performing "lease moved" recovery. The server can stop asserting
6407 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6408 * this operation is identified in the SEQUENCE operation in this
6409 * compound.
6410 */
6411static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6412{
6413 struct nfs_server *server = NFS_SERVER(inode);
6414 struct rpc_clnt *clnt = server->client;
6415 struct nfs4_fsid_present_arg args = {
6416 .fh = NFS_FH(inode),
6417 };
6418 struct nfs4_fsid_present_res res = {
6419 };
6420 struct rpc_message msg = {
6421 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6422 .rpc_argp = &args,
6423 .rpc_resp = &res,
6424 .rpc_cred = cred,
6425 };
6426 int status;
6427
6428 res.fh = nfs_alloc_fhandle();
6429 if (res.fh == NULL)
6430 return -ENOMEM;
6431
6432 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6433 nfs4_set_sequence_privileged(&args.seq_args);
6434 status = nfs4_call_sync_sequence(clnt, server, &msg,
6435 &args.seq_args, &res.seq_res);
6436 nfs_free_fhandle(res.fh);
6437 if (status == NFS4_OK &&
6438 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6439 status = -NFS4ERR_LEASE_MOVED;
6440 return status;
6441}
6442
6443#endif /* CONFIG_NFS_V4_1 */
6444
6445/**
6446 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6447 * @inode: inode on FSID to check
6448 * @cred: credential to use for this operation
6449 *
6450 * Server indicates whether the FSID is present, moved, or not
6451 * recognized. This operation is necessary to clear a LEASE_MOVED
6452 * condition for this client ID.
6453 *
6454 * Returns NFS4_OK if the FSID is present on this server,
6455 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6456 * NFS4ERR code if some error occurred on the server, or a
6457 * negative errno if a local failure occurred.
6458 */
6459int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6460{
6461 struct nfs_server *server = NFS_SERVER(inode);
6462 struct nfs_client *clp = server->nfs_client;
6463 const struct nfs4_mig_recovery_ops *ops =
6464 clp->cl_mvops->mig_recovery_ops;
6465 struct nfs4_exception exception = { };
6466 int status;
6467
6468 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6469 (unsigned long long)server->fsid.major,
6470 (unsigned long long)server->fsid.minor,
6471 clp->cl_hostname);
6472 nfs_display_fhandle(NFS_FH(inode), __func__);
6473
6474 do {
6475 status = ops->fsid_present(inode, cred);
6476 if (status != -NFS4ERR_DELAY)
6477 break;
6478 nfs4_handle_exception(server, status, &exception);
6479 } while (exception.retry);
6480 return status;
6481}
6482
5ec16a85 6483/**
a5250def
WAA		 6484 * If 'use_integrity' is true and the state managment nfs_client
6485 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6486 * and the machine credential as per RFC3530bis and RFC5661 Security
6487 * Considerations sections. Otherwise, just use the user cred with the
6488 * filesystem's rpc_client.
5ec16a85 6489 */
a5250def 6490static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6491{
6492 int status;
6493 struct nfs4_secinfo_arg args = {
6494 .dir_fh = NFS_FH(dir),
6495 .name = name,
6496 };
6497 struct nfs4_secinfo_res res = {
6498 .flavors = flavors,
6499 };
6500 struct rpc_message msg = {
6501 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6502 .rpc_argp = &args,
6503 .rpc_resp = &res,
6504 };
a5250def 6505 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6506 struct rpc_cred *cred = NULL;
a5250def
WAA		 6507
6508 if (use_integrity) {
6509 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6510 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6511 msg.rpc_cred = cred;
a5250def 6512 }
5a5ea0d4
BS		 6513
6514 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6515
6516 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6517 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6518
a5250def
WAA		 6519 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6520 &res.seq_res, 0);
5a5ea0d4 6521 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6522
7cb852df
WAA		 6523 if (cred)
6524 put_rpccred(cred);
a5250def 6525
5a5ea0d4
BS		 6526 return status;
6527}
6528
72de53ec
BS		 6529int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6530 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6531{
6532 struct nfs4_exception exception = { };
6533 int err;
6534 do {
a5250def
WAA		 6535 err = -NFS4ERR_WRONGSEC;
6536
6537 /* try to use integrity protection with machine cred */
6538 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6539 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6540
6541 /*
6542 * if unable to use integrity protection, or SECINFO with
6543 * integrity protection returns NFS4ERR_WRONGSEC (which is
6544 * disallowed by spec, but exists in deployed servers) use
6545 * the current filesystem's rpc_client and the user cred.
6546 */
6547 if (err == -NFS4ERR_WRONGSEC)
6548 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6549
078ea3df
TM		 6550 trace_nfs4_secinfo(dir, name, err);
6551 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6552 &exception);
6553 } while (exception.retry);
6554 return err;
6555}
6556
557134a3 6557#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6558/*
6559 * Check the exchange flags returned by the server for invalid flags, having
6560 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6561 * DS flags set.
6562 */
6563static int nfs4_check_cl_exchange_flags(u32 flags)
6564{
6565 if (flags & ~EXCHGID4_FLAG_MASK_R)
6566 goto out_inval;
6567 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6568 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6569 goto out_inval;
6570 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6571 goto out_inval;
6572 return NFS_OK;
6573out_inval:
6574 return -NFS4ERR_INVAL;
6575}
6576
78fe0f41 6577static bool
79d4e1f0
CL		 6578nfs41_same_server_scope(struct nfs41_server_scope *a,
6579 struct nfs41_server_scope *b)
78fe0f41
WAA		 6580{
6581 if (a->server_scope_sz == b->server_scope_sz &&
6582 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6583 return true;
6584
6585 return false;
6586}
6587
7c44f1ae
WAA		 6588/*
6589 * nfs4_proc_bind_conn_to_session()
6590 *
6591 * The 4.1 client currently uses the same TCP connection for the
6592 * fore and backchannel.
6593 */
2cf047c9 6594int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6595{
6596 int status;
6597 struct nfs41_bind_conn_to_session_res res;
6598 struct rpc_message msg = {
6599 .rpc_proc =
6600 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6601 .rpc_argp = clp,
6602 .rpc_resp = &res,
2cf047c9 6603 .rpc_cred = cred,
7c44f1ae
WAA		 6604 };
6605
6606 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 6607
6608 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6609 if (unlikely(res.session == NULL)) {
6610 status = -ENOMEM;
6611 goto out;
6612 }
6613
6614 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6615 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 6616 if (status == 0) {
6617 if (memcmp(res.session->sess_id.data,
6618 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6619 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6620 status = -EIO;
6621 goto out_session;
6622 }
6623 if (res.dir != NFS4_CDFS4_BOTH) {
6624 dprintk("NFS: %s: Unexpected direction from server\n",
6625 __func__);
6626 status = -EIO;
6627 goto out_session;
6628 }
6629 if (res.use_conn_in_rdma_mode) {
6630 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6631 __func__);
6632 status = -EIO;
6633 goto out_session;
6634 }
6635 }
6636out_session:
6637 kfree(res.session);
6638out:
6639 dprintk("<-- %s status= %d\n", __func__, status);
6640 return status;
6641}
6642
99fe60d0 6643/*
fa940720
WAA		 6644 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6645 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6646 */
6647static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6648 .how = SP4_MACH_CRED,
6649 .enforce.u.words = {
6650 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6651 1 << (OP_EXCHANGE_ID - 32) |
6652 1 << (OP_CREATE_SESSION - 32) |
6653 1 << (OP_DESTROY_SESSION - 32) |
6654 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6655 },
6656 .allow.u.words = {
6657 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6658 1 << (OP_LOCKU) |
6659 1 << (OP_COMMIT),
8b5bee2e 6660 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6661 1 << (OP_SECINFO_NO_NAME - 32) |
6662 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6663 1 << (OP_FREE_STATEID - 32) |
6664 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6665 }
6666};
6667
6668/*
6669 * Select the state protection mode for client `clp' given the server results
6670 * from exchange_id in `sp'.
99fe60d0 6671 *
2031cd1a
WAA		 6672 * Returns 0 on success, negative errno otherwise.
6673 */
6674static int nfs4_sp4_select_mode(struct nfs_client *clp,
6675 struct nfs41_state_protection *sp)
6676{
6677 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6678 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6679 1 << (OP_EXCHANGE_ID - 32) |
6680 1 << (OP_CREATE_SESSION - 32) |
6681 1 << (OP_DESTROY_SESSION - 32) |
6682 1 << (OP_DESTROY_CLIENTID - 32)
6683 };
6684 unsigned int i;
6685
6686 if (sp->how == SP4_MACH_CRED) {
6687 /* Print state protect result */
6688 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6689 for (i = 0; i <= LAST_NFS4_OP; i++) {
6690 if (test_bit(i, sp->enforce.u.longs))
6691 dfprintk(MOUNT, " enforce op %d\n", i);
6692 if (test_bit(i, sp->allow.u.longs))
6693 dfprintk(MOUNT, " allow op %d\n", i);
6694 }
6695
6696 /* make sure nothing is on enforce list that isn't supported */
6697 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6698 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6699 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6700 return -EINVAL;
6701 }
6702 }
6703
6704 /*
6705 * Minimal mode - state operations are allowed to use machine
6706 * credential. Note this already happens by default, so the
6707 * client doesn't have to do anything more than the negotiation.
6708 *
6709 * NOTE: we don't care if EXCHANGE_ID is in the list -
6710 * we're already using the machine cred for exchange_id
6711 * and will never use a different cred.
6712 */
6713 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6714 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6715 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6716 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6717 dfprintk(MOUNT, "sp4_mach_cred:\n");
6718 dfprintk(MOUNT, " minimal mode enabled\n");
6719 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6720 } else {
6721 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6722 return -EINVAL;
6723 }
fa940720
WAA		 6724
6725 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6726 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6727 dfprintk(MOUNT, " cleanup mode enabled\n");
6728 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6729 }
8b5bee2e
WAA		 6730
6731 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6732 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6733 dfprintk(MOUNT, " secinfo mode enabled\n");
6734 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6735 }
3787d506
WAA		 6736
6737 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6738 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6739 dfprintk(MOUNT, " stateid mode enabled\n");
6740 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6741 }
8c21c62c
WAA		 6742
6743 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6744 dfprintk(MOUNT, " write mode enabled\n");
6745 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6746 }
6747
6748 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6749 dfprintk(MOUNT, " commit mode enabled\n");
6750 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6751 }
2031cd1a
WAA		 6752 }
6753
6754 return 0;
6755}
6756
6757/*
6758 * _nfs4_proc_exchange_id()
6bbb4ae8 6759 *
2031cd1a 6760 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6761 */
2031cd1a
WAA		 6762static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6763 u32 sp4_how)
99fe60d0
BH		 6764{
6765 nfs4_verifier verifier;
6766 struct nfs41_exchange_id_args args = {
cd93710e 6767 .verifier = &verifier,
99fe60d0 6768 .client = clp,
cd3fadec 6769#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6770 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6771 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6772 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6773#else
6774 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6775 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6776#endif
99fe60d0
BH		 6777 };
6778 struct nfs41_exchange_id_res res = {
32b01310 6779 0
99fe60d0
BH		 6780 };
6781 int status;
6782 struct rpc_message msg = {
6783 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6784 .rpc_argp = &args,
6785 .rpc_resp = &res,
6786 .rpc_cred = cred,
6787 };
99fe60d0 6788
f092075d 6789 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6790 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6791 sizeof(args.id));
6bbb4ae8
CL		 6792 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6793 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6794 args.id_len, args.id);
99fe60d0 6795
acdeb69d 6796 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6797 GFP_NOFS);
acdeb69d 6798 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6799 status = -ENOMEM;
6800 goto out;
6801 }
78fe0f41 6802
79d4e1f0 6803 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6804 GFP_NOFS);
177313f1 6805 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6806 status = -ENOMEM;
acdeb69d 6807 goto out_server_owner;
abe9a6d5 6808 }
78fe0f41 6809
bbafffd2 6810 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6811 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6812 status = -ENOMEM;
6813 goto out_server_scope;
6814 }
6815
2031cd1a
WAA		 6816 switch (sp4_how) {
6817 case SP4_NONE:
6818 args.state_protect.how = SP4_NONE;
6819 break;
6820
6821 case SP4_MACH_CRED:
6822 args.state_protect = nfs4_sp4_mach_cred_request;
6823 break;
6824
6825 default:
6826 /* unsupported! */
6827 WARN_ON_ONCE(1);
6828 status = -EINVAL;
6829 goto out_server_scope;
6830 }
6831
1bd714f2 6832 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6833 trace_nfs4_exchange_id(clp, status);
177313f1 6834 if (status == 0)
32b01310 6835 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6836
2031cd1a
WAA		 6837 if (status == 0)
6838 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6839
acdeb69d 6840 if (status == 0) {
32b01310
TM		 6841 clp->cl_clientid = res.clientid;
6842 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6843 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6844 clp->cl_seqid = res.seqid;
6845
acdeb69d
CL		 6846 kfree(clp->cl_serverowner);
6847 clp->cl_serverowner = res.server_owner;
6848 res.server_owner = NULL;
78fe0f41 6849
7d2ed9ac 6850 /* use the most recent implementation id */
59155546
CL		 6851 kfree(clp->cl_implid);
6852 clp->cl_implid = res.impl_id;
7d2ed9ac 6853
177313f1 6854 if (clp->cl_serverscope != NULL &&
79d4e1f0 6855 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6856 res.server_scope)) {
6857 dprintk("%s: server_scope mismatch detected\n",
6858 __func__);
6859 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6860 kfree(clp->cl_serverscope);
6861 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6862 }
6863
177313f1 6864 if (clp->cl_serverscope == NULL) {
79d4e1f0 6865 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6866 goto out;
6867 }
32b01310
TM		 6868 } else
6869 kfree(res.impl_id);
7d2ed9ac 6870
acdeb69d
CL		 6871out_server_owner:
6872 kfree(res.server_owner);
7d2ed9ac 6873out_server_scope:
abe9a6d5
WAA		 6874 kfree(res.server_scope);
6875out:
177313f1 6876 if (clp->cl_implid != NULL)
6bbb4ae8 6877 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6878 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6879 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6880 clp->cl_implid->date.seconds,
6881 clp->cl_implid->date.nseconds);
6bbb4ae8 6882 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6883 return status;
6884}
6885
2031cd1a
WAA		 6886/*
6887 * nfs4_proc_exchange_id()
6888 *
6889 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6890 *
6891 * Since the clientid has expired, all compounds using sessions
6892 * associated with the stale clientid will be returning
6893 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6894 * be in some phase of session reset.
6895 *
6896 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6897 */
6898int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6899{
6900 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6901 int status;
6902
6903 /* try SP4_MACH_CRED if krb5i/p */
6904 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6905 authflavor == RPC_AUTH_GSS_KRB5P) {
6906 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6907 if (!status)
6908 return 0;
6909 }
6910
6911 /* try SP4_NONE */
6912 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6913}
6914
66245539
TM		 6915static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6916 struct rpc_cred *cred)
6917{
6918 struct rpc_message msg = {
6919 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6920 .rpc_argp = clp,
6921 .rpc_cred = cred,
6922 };
6923 int status;
6924
6925 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6926 trace_nfs4_destroy_clientid(clp, status);
66245539 6927 if (status)
02c67525 6928 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6929 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6930 return status;
6931}
6932
6933static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6934 struct rpc_cred *cred)
6935{
6936 unsigned int loop;
6937 int ret;
6938
6939 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6940 ret = _nfs4_proc_destroy_clientid(clp, cred);
6941 switch (ret) {
6942 case -NFS4ERR_DELAY:
6943 case -NFS4ERR_CLIENTID_BUSY:
6944 ssleep(1);
6945 break;
6946 default:
6947 return ret;
6948 }
6949 }
6950 return 0;
6951}
6952
6953int nfs4_destroy_clientid(struct nfs_client *clp)
6954{
6955 struct rpc_cred *cred;
6956 int ret = 0;
6957
6958 if (clp->cl_mvops->minor_version < 1)
6959 goto out;
6960 if (clp->cl_exchange_flags == 0)
6961 goto out;
05f4c350
CL		 6962 if (clp->cl_preserve_clid)
6963 goto out;
73d8bde5 6964 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6965 ret = nfs4_proc_destroy_clientid(clp, cred);
6966 if (cred)
6967 put_rpccred(cred);
6968 switch (ret) {
6969 case 0:
6970 case -NFS4ERR_STALE_CLIENTID:
6971 clp->cl_exchange_flags = 0;
6972 }
6973out:
6974 return ret;
6975}
6976
2050f0cc
AA		 6977struct nfs4_get_lease_time_data {
6978 struct nfs4_get_lease_time_args *args;
6979 struct nfs4_get_lease_time_res *res;
6980 struct nfs_client *clp;
6981};
6982
6983static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6984 void *calldata)
6985{
2050f0cc
AA		 6986 struct nfs4_get_lease_time_data *data =
6987 (struct nfs4_get_lease_time_data *)calldata;
6988
6989 dprintk("--> %s\n", __func__);
6990 /* just setup sequence, do not trigger session recovery
6991 since we're invoked within one */
d9afbd1b
TM		 6992 nfs41_setup_sequence(data->clp->cl_session,
6993 &data->args->la_seq_args,
6994 &data->res->lr_seq_res,
6995 task);
2050f0cc
AA		 6996 dprintk("<-- %s\n", __func__);
6997}
6998
6999/*
7000 * Called from nfs4_state_manager thread for session setup, so don't recover
7001 * from sequence operation or clientid errors.
7002 */
7003static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7004{
7005 struct nfs4_get_lease_time_data *data =
7006 (struct nfs4_get_lease_time_data *)calldata;
7007
7008 dprintk("--> %s\n", __func__);
14516c3a
TM		 7009 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7010 return;
2050f0cc
AA		 7011 switch (task->tk_status) {
7012 case -NFS4ERR_DELAY:
7013 case -NFS4ERR_GRACE:
7014 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7015 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7016 task->tk_status = 0;
a8a4ae3a
AA		 7017 /* fall through */
7018 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7019 rpc_restart_call_prepare(task);
2050f0cc
AA		 7020 return;
7021 }
2050f0cc
AA		 7022 dprintk("<-- %s\n", __func__);
7023}
7024
17280175 7025static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7026 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7027 .rpc_call_done = nfs4_get_lease_time_done,
7028};
7029
7030int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7031{
7032 struct rpc_task *task;
7033 struct nfs4_get_lease_time_args args;
7034 struct nfs4_get_lease_time_res res = {
7035 .lr_fsinfo = fsinfo,
7036 };
7037 struct nfs4_get_lease_time_data data = {
7038 .args = &args,
7039 .res = &res,
7040 .clp = clp,
7041 };
7042 struct rpc_message msg = {
7043 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7044 .rpc_argp = &args,
7045 .rpc_resp = &res,
7046 };
7047 struct rpc_task_setup task_setup = {
7048 .rpc_client = clp->cl_rpcclient,
7049 .rpc_message = &msg,
7050 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7051 .callback_data = &data,
7052 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7053 };
7054 int status;
7055
a9c92d6b 7056 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7057 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7058 dprintk("--> %s\n", __func__);
7059 task = rpc_run_task(&task_setup);
7060
7061 if (IS_ERR(task))
7062 status = PTR_ERR(task);
7063 else {
7064 status = task->tk_status;
7065 rpc_put_task(task);
7066 }
7067 dprintk("<-- %s return %d\n", __func__, status);
7068
7069 return status;
7070}
7071
fc931582
AA		 7072/*
7073 * Initialize the values to be used by the client in CREATE_SESSION
7074 * If nfs4_init_session set the fore channel request and response sizes,
7075 * use them.
7076 *
7077 * Set the back channel max_resp_sz_cached to zero to force the client to
7078 * always set csa_cachethis to FALSE because the current implementation
7079 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7080 */
7081static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7082{
18aad3d5
AA		 7083 unsigned int max_rqst_sz, max_resp_sz;
7084
7085 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7086 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7087
fc931582 7088 /* Fore channel attributes */
18aad3d5
AA		 7089 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7090 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7091 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7092 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7093
7094 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7095 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7096 __func__,
7097 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7098 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7099
7100 /* Back channel attributes */
fc931582
AA		 7101 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7102 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7103 args->bc_attrs.max_resp_sz_cached = 0;
7104 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7105 args->bc_attrs.max_reqs = 1;
7106
7107 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7108 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7109 __func__,
7110 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7111 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7112 args->bc_attrs.max_reqs);
7113}
7114
43c2e885 7115static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 7116{
43c2e885
BF		 7117 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7118 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
7119
43c2e885
BF		 7120 if (rcvd->max_resp_sz > sent->max_resp_sz)
7121 return -EINVAL;
7122 /*
7123 * Our requested max_ops is the minimum we need; we're not
7124 * prepared to break up compounds into smaller pieces than that.
7125 * So, no point even trying to continue if the server won't
7126 * cooperate:
7127 */
7128 if (rcvd->max_ops < sent->max_ops)
7129 return -EINVAL;
7130 if (rcvd->max_reqs == 0)
7131 return -EINVAL;
b4b9a0c1
VG		 7132 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7133 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7134 return 0;
8d35301d
AA		 7135}
7136
43c2e885
BF		 7137static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
7138{
7139 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7140 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 7141
43c2e885
BF		 7142 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7143 return -EINVAL;
7144 if (rcvd->max_resp_sz < sent->max_resp_sz)
7145 return -EINVAL;
7146 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7147 return -EINVAL;
7148 /* These would render the backchannel useless: */
b4b9a0c1 7149 if (rcvd->max_ops != sent->max_ops)
43c2e885 7150 return -EINVAL;
b4b9a0c1 7151 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 7152 return -EINVAL;
7153 return 0;
7154}
8d35301d 7155
8d35301d
AA		 7156static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7157 struct nfs4_session *session)
7158{
43c2e885 7159 int ret;
8d35301d 7160
43c2e885
BF		 7161 ret = nfs4_verify_fore_channel_attrs(args, session);
7162 if (ret)
7163 return ret;
7164 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 7165}
7166
848f5bda
TM		 7167static int _nfs4_proc_create_session(struct nfs_client *clp,
7168 struct rpc_cred *cred)
fc931582
AA		 7169{
7170 struct nfs4_session *session = clp->cl_session;
7171 struct nfs41_create_session_args args = {
7172 .client = clp,
7173 .cb_program = NFS4_CALLBACK,
7174 };
7175 struct nfs41_create_session_res res = {
7176 .client = clp,
7177 };
7178 struct rpc_message msg = {
7179 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7180 .rpc_argp = &args,
7181 .rpc_resp = &res,
848f5bda 7182 .rpc_cred = cred,
fc931582
AA		 7183 };
7184 int status;
7185
7186 nfs4_init_channel_attrs(&args);
0f91421e 7187 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7188
1bd714f2 7189 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7190 trace_nfs4_create_session(clp, status);
fc931582 7191
43095d39 7192 if (!status) {
8d35301d
AA		 7193 /* Verify the session's negotiated channel_attrs values */
7194 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 7195 /* Increment the clientid slot sequence id */
7196 clp->cl_seqid++;
7197 }
7198
7199 return status;
7200}
7201
7202/*
7203 * Issues a CREATE_SESSION operation to the server.
7204 * It is the responsibility of the caller to verify the session is
7205 * expired before calling this routine.
7206 */
848f5bda 7207int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7208{
7209 int status;
7210 unsigned *ptr;
fc931582
AA		 7211 struct nfs4_session *session = clp->cl_session;
7212
7213 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7214
848f5bda 7215 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7216 if (status)
7217 goto out;
7218
aacd5537
AA		 7219 /* Init or reset the session slot tables */
7220 status = nfs4_setup_session_slot_tables(session);
7221 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7222 if (status)
7223 goto out;
7224
7225 ptr = (unsigned *)&session->sess_id.data[0];
7226 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7227 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7228out:
7229 dprintk("<-- %s\n", __func__);
7230 return status;
7231}
7232
0f3e66c6
AA		 7233/*
7234 * Issue the over-the-wire RPC DESTROY_SESSION.
7235 * The caller must serialize access to this routine.
7236 */
848f5bda
TM		 7237int nfs4_proc_destroy_session(struct nfs4_session *session,
7238 struct rpc_cred *cred)
0f3e66c6 7239{
848f5bda
TM		 7240 struct rpc_message msg = {
7241 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7242 .rpc_argp = session,
7243 .rpc_cred = cred,
7244 };
0f3e66c6 7245 int status = 0;
0f3e66c6
AA		 7246
7247 dprintk("--> nfs4_proc_destroy_session\n");
7248
7249 /* session is still being setup */
7250 if (session->clp->cl_cons_state != NFS_CS_READY)
7251 return status;
7252
1bd714f2 7253 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7254 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7255
7256 if (status)
08106ac7 7257 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7258 "Session has been destroyed regardless...\n", status);
7259
7260 dprintk("<-- nfs4_proc_destroy_session\n");
7261 return status;
7262}
7263
fc01cea9
AA		 7264/*
7265 * Renew the cl_session lease.
7266 */
d5f8d3fe
TM		 7267struct nfs4_sequence_data {
7268 struct nfs_client *clp;
7269 struct nfs4_sequence_args args;
7270 struct nfs4_sequence_res res;
7271};
7272
dc96aef9
AB		 7273static void nfs41_sequence_release(void *data)
7274{
d5f8d3fe
TM		 7275 struct nfs4_sequence_data *calldata = data;
7276 struct nfs_client *clp = calldata->clp;
dc96aef9 7277
7135840f
AB		 7278 if (atomic_read(&clp->cl_count) > 1)
7279 nfs4_schedule_state_renewal(clp);
7280 nfs_put_client(clp);
d5f8d3fe 7281 kfree(calldata);
dc96aef9
AB		 7282}
7283
aa5190d0
TM		 7284static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7285{
7286 switch(task->tk_status) {
7287 case -NFS4ERR_DELAY:
aa5190d0
TM		 7288 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7289 return -EAGAIN;
7290 default:
0400a6b0 7291 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7292 }
7293 return 0;
7294}
7295
dc96aef9 7296static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7297{
d5f8d3fe
TM		 7298 struct nfs4_sequence_data *calldata = data;
7299 struct nfs_client *clp = calldata->clp;
fc01cea9 7300
14516c3a
TM		 7301 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7302 return;
fc01cea9 7303
c6d01c6f 7304 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7305 if (task->tk_status < 0) {
7306 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7307 if (atomic_read(&clp->cl_count) == 1)
7308 goto out;
fc01cea9 7309
aa5190d0
TM		 7310 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7311 rpc_restart_call_prepare(task);
fc01cea9
AA		 7312 return;
7313 }
7314 }
fc01cea9 7315 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7316out:
fc01cea9
AA		 7317 dprintk("<-- %s\n", __func__);
7318}
7319
7320static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7321{
d5f8d3fe
TM		 7322 struct nfs4_sequence_data *calldata = data;
7323 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7324 struct nfs4_sequence_args *args;
7325 struct nfs4_sequence_res *res;
7326
fc01cea9
AA		 7327 args = task->tk_msg.rpc_argp;
7328 res = task->tk_msg.rpc_resp;
7329
d9afbd1b 7330 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7331}
7332
7333static const struct rpc_call_ops nfs41_sequence_ops = {
7334 .rpc_call_done = nfs41_sequence_call_done,
7335 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7336 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7337};
7338
8fe72bac
TM		 7339static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7340 struct rpc_cred *cred,
7341 bool is_privileged)
fc01cea9 7342{
d5f8d3fe 7343 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7344 struct rpc_message msg = {
7345 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7346 .rpc_cred = cred,
7347 };
71ac6da9
TM		 7348 struct rpc_task_setup task_setup_data = {
7349 .rpc_client = clp->cl_rpcclient,
7350 .rpc_message = &msg,
8fe72bac 7351 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7352 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7353 };
fc01cea9 7354
7135840f 7355 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7356 return ERR_PTR(-EIO);
dfb4f309 7357 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7358 if (calldata == NULL) {
7135840f 7359 nfs_put_client(clp);
71ac6da9 7360 return ERR_PTR(-ENOMEM);
fc01cea9 7361 }
a9c92d6b 7362 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7363 if (is_privileged)
7364 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7365 msg.rpc_argp = &calldata->args;
7366 msg.rpc_resp = &calldata->res;
7367 calldata->clp = clp;
71ac6da9 7368 task_setup_data.callback_data = calldata;
fc01cea9 7369
71ac6da9
TM		 7370 return rpc_run_task(&task_setup_data);
7371}
7372
2f60ea6b 7373static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7374{
7375 struct rpc_task *task;
7376 int ret = 0;
7377
2f60ea6b 7378 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7379 return -EAGAIN;
8fe72bac 7380 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7381 if (IS_ERR(task))
7382 ret = PTR_ERR(task);
7383 else
bf294b41 7384 rpc_put_task_async(task);
71ac6da9
TM		 7385 dprintk("<-- %s status=%d\n", __func__, ret);
7386 return ret;
7387}
7388
7389static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7390{
7391 struct rpc_task *task;
7392 int ret;
7393
8fe72bac 7394 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7395 if (IS_ERR(task)) {
7396 ret = PTR_ERR(task);
7397 goto out;
7398 }
7399 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7400 if (!ret) {
7401 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7402
7403 if (task->tk_status == 0)
7404 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7405 ret = task->tk_status;
b4410c2f 7406 }
71ac6da9
TM		 7407 rpc_put_task(task);
7408out:
7409 dprintk("<-- %s status=%d\n", __func__, ret);
7410 return ret;
fc01cea9
AA		 7411}
7412
fce5c838
RL		 7413struct nfs4_reclaim_complete_data {
7414 struct nfs_client *clp;
7415 struct nfs41_reclaim_complete_args arg;
7416 struct nfs41_reclaim_complete_res res;
7417};
7418
7419static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7420{
7421 struct nfs4_reclaim_complete_data *calldata = data;
7422
d9afbd1b
TM		 7423 nfs41_setup_sequence(calldata->clp->cl_session,
7424 &calldata->arg.seq_args,
7425 &calldata->res.seq_res,
7426 task);
fce5c838
RL		 7427}
7428
aa5190d0
TM		 7429static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7430{
7431 switch(task->tk_status) {
7432 case 0:
7433 case -NFS4ERR_COMPLETE_ALREADY:
7434 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7435 break;
7436 case -NFS4ERR_DELAY:
aa5190d0 7437 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7438 /* fall through */
7439 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7440 return -EAGAIN;
7441 default:
0400a6b0 7442 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7443 }
7444 return 0;
7445}
7446
fce5c838
RL		 7447static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7448{
7449 struct nfs4_reclaim_complete_data *calldata = data;
7450 struct nfs_client *clp = calldata->clp;
7451 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7452
7453 dprintk("--> %s\n", __func__);
14516c3a
TM		 7454 if (!nfs41_sequence_done(task, res))
7455 return;
fce5c838 7456
c6d01c6f 7457 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7458 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7459 rpc_restart_call_prepare(task);
7460 return;
7461 }
fce5c838
RL		 7462 dprintk("<-- %s\n", __func__);
7463}
7464
7465static void nfs4_free_reclaim_complete_data(void *data)
7466{
7467 struct nfs4_reclaim_complete_data *calldata = data;
7468
7469 kfree(calldata);
7470}
7471
7472static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7473 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7474 .rpc_call_done = nfs4_reclaim_complete_done,
7475 .rpc_release = nfs4_free_reclaim_complete_data,
7476};
7477
7478/*
7479 * Issue a global reclaim complete.
7480 */
965e9c23
TM		 7481static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7482 struct rpc_cred *cred)
fce5c838
RL		 7483{
7484 struct nfs4_reclaim_complete_data *calldata;
7485 struct rpc_task *task;
7486 struct rpc_message msg = {
7487 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7488 .rpc_cred = cred,
fce5c838
RL		 7489 };
7490 struct rpc_task_setup task_setup_data = {
7491 .rpc_client = clp->cl_rpcclient,
7492 .rpc_message = &msg,
7493 .callback_ops = &nfs4_reclaim_complete_call_ops,
7494 .flags = RPC_TASK_ASYNC,
7495 };
7496 int status = -ENOMEM;
7497
7498 dprintk("--> %s\n", __func__);
8535b2be 7499 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7500 if (calldata == NULL)
7501 goto out;
7502 calldata->clp = clp;
7503 calldata->arg.one_fs = 0;
fce5c838 7504
a9c92d6b 7505 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7506 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7507 msg.rpc_argp = &calldata->arg;
7508 msg.rpc_resp = &calldata->res;
7509 task_setup_data.callback_data = calldata;
7510 task = rpc_run_task(&task_setup_data);
acf82b85 7511 if (IS_ERR(task)) {
fce5c838 7512 status = PTR_ERR(task);
acf82b85
DC		 7513 goto out;
7514 }
c34c32ea
AA		 7515 status = nfs4_wait_for_completion_rpc_task(task);
7516 if (status == 0)
7517 status = task->tk_status;
fce5c838 7518 rpc_put_task(task);
acf82b85 7519 return 0;
fce5c838
RL		 7520out:
7521 dprintk("<-- %s status=%d\n", __func__, status);
7522 return status;
7523}
b1f69b75
AA		 7524
7525static void
7526nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7527{
7528 struct nfs4_layoutget *lgp = calldata;
c31663d4 7529 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7530 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7531
7532 dprintk("--> %s\n", __func__);
c31663d4
FI		 7533 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7534 * right now covering the LAYOUTGET we are about to send.
7535 * However, that is not so catastrophic, and there seems
7536 * to be no way to prevent it completely.
7537 */
6ba7db34 7538 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7539 &lgp->res.seq_res, task))
b1f69b75 7540 return;
cf7d63f1
FI		 7541 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7542 NFS_I(lgp->args.inode)->layout,
ce6ab4f2 7543 &lgp->args.range,
cf7d63f1
FI		 7544 lgp->args.ctx->state)) {
7545 rpc_exit(task, NFS4_OK);
cf7d63f1 7546 }
b1f69b75
AA		 7547}
7548
7549static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7550{
7551 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7552 struct inode *inode = lgp->args.inode;
7553 struct nfs_server *server = NFS_SERVER(inode);
7554 struct pnfs_layout_hdr *lo;
7555 struct nfs4_state *state = NULL;
ed7e5423 7556 unsigned long timeo, now, giveup;
b1f69b75 7557
ed7e5423 7558 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7559
6ba7db34 7560 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7561 goto out;
b1f69b75
AA		 7562
7563 switch (task->tk_status) {
7564 case 0:
ee314c2a 7565 goto out;
ed7e5423
BH		 7566 /*
7567 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7568 * (or clients) writing to the same RAID stripe
7569 */
b1f69b75 7570 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7571 /*
7572 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7573 * existing layout before getting a new one).
7574 */
b1f69b75 7575 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7576 timeo = rpc_get_timeout(task->tk_client);
7577 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7578 now = jiffies;
7579 if (time_after(giveup, now)) {
7580 unsigned long delay;
7581
7582 /* Delay for:
7583 * - Not less then NFS4_POLL_RETRY_MIN.
7584 * - One last time a jiffie before we give up
7585 * - exponential backoff (time_now minus start_attempt)
7586 */
7587 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7588 min((giveup - now - 1),
7589 now - lgp->args.timestamp));
7590
7591 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7592 __func__, delay);
7593 rpc_delay(task, delay);
7594 task->tk_status = 0;
7595 rpc_restart_call_prepare(task);
7596 goto out; /* Do not call nfs4_async_handle_error() */
7597 }
ee314c2a
TM		 7598 break;
7599 case -NFS4ERR_EXPIRED:
7600 case -NFS4ERR_BAD_STATEID:
7601 spin_lock(&inode->i_lock);
7602 lo = NFS_I(inode)->layout;
7603 if (!lo || list_empty(&lo->plh_segs)) {
7604 spin_unlock(&inode->i_lock);
7605 /* If the open stateid was bad, then recover it. */
7606 state = lgp->args.ctx->state;
7607 } else {
7608 LIST_HEAD(head);
7609
defb8460
CH		 7610 /*
7611 * Mark the bad layout state as invalid, then retry
7612 * with the current stateid.
7613 */
ee314c2a
TM		 7614 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7615 spin_unlock(&inode->i_lock);
ee314c2a 7616 pnfs_free_lseg_list(&head);
defb8460
CH		 7617
7618 task->tk_status = 0;
7619 rpc_restart_call_prepare(task);
b1f69b75
AA		 7620 }
7621 }
8478eaa1 7622 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
ee314c2a
TM		 7623 rpc_restart_call_prepare(task);
7624out:
b1f69b75
AA		 7625 dprintk("<-- %s\n", __func__);
7626}
7627
8554116e
IK		 7628static size_t max_response_pages(struct nfs_server *server)
7629{
7630 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7631 return nfs_page_array_len(0, max_resp_sz);
7632}
7633
7634static void nfs4_free_pages(struct page **pages, size_t size)
7635{
7636 int i;
7637
7638 if (!pages)
7639 return;
7640
7641 for (i = 0; i < size; i++) {
7642 if (!pages[i])
7643 break;
7644 __free_page(pages[i]);
7645 }
7646 kfree(pages);
7647}
7648
7649static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7650{
7651 struct page **pages;
7652 int i;
7653
7654 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7655 if (!pages) {
7656 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7657 return NULL;
7658 }
7659
7660 for (i = 0; i < size; i++) {
7661 pages[i] = alloc_page(gfp_flags);
7662 if (!pages[i]) {
7663 dprintk("%s: failed to allocate page\n", __func__);
7664 nfs4_free_pages(pages, size);
7665 return NULL;
7666 }
7667 }
7668
7669 return pages;
7670}
7671
b1f69b75
AA		 7672static void nfs4_layoutget_release(void *calldata)
7673{
7674 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7675 struct inode *inode = lgp->args.inode;
7676 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7677 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7678
7679 dprintk("--> %s\n", __func__);
8554116e 7680 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7681 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7682 put_nfs_open_context(lgp->args.ctx);
7683 kfree(calldata);
7684 dprintk("<-- %s\n", __func__);
7685}
7686
7687static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7688 .rpc_call_prepare = nfs4_layoutget_prepare,
7689 .rpc_call_done = nfs4_layoutget_done,
7690 .rpc_release = nfs4_layoutget_release,
7691};
7692
a0b0a6e3
TM		 7693struct pnfs_layout_segment *
7694nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7695{
a47970ff
WAA		 7696 struct inode *inode = lgp->args.inode;
7697 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7698 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7699 struct rpc_task *task;
7700 struct rpc_message msg = {
7701 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7702 .rpc_argp = &lgp->args,
7703 .rpc_resp = &lgp->res,
6ab59344 7704 .rpc_cred = lgp->cred,
b1f69b75
AA		 7705 };
7706 struct rpc_task_setup task_setup_data = {
7707 .rpc_client = server->client,
7708 .rpc_message = &msg,
7709 .callback_ops = &nfs4_layoutget_call_ops,
7710 .callback_data = lgp,
7711 .flags = RPC_TASK_ASYNC,
7712 };
a0b0a6e3 7713 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7714 int status = 0;
7715
7716 dprintk("--> %s\n", __func__);
7717
4bd5a980
PT		 7718 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7719 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7720
8554116e
IK		 7721 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7722 if (!lgp->args.layout.pages) {
7723 nfs4_layoutget_release(lgp);
a0b0a6e3 7724 return ERR_PTR(-ENOMEM);
8554116e
IK		 7725 }
7726 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7727 lgp->args.timestamp = jiffies;
8554116e 7728
35124a09 7729 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7730 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7731 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 7732
b1f69b75
AA		 7733 task = rpc_run_task(&task_setup_data);
7734 if (IS_ERR(task))
a0b0a6e3 7735 return ERR_CAST(task);
b1f69b75 7736 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7737 if (status == 0)
7738 status = task->tk_status;
1037e6ea
TM		 7739 trace_nfs4_layoutget(lgp->args.ctx,
7740 &lgp->args.range,
7741 &lgp->res.range,
7742 status);
085b7a45
WAA		 7743 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7744 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7745 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7746 rpc_put_task(task);
7747 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7748 if (status)
7749 return ERR_PTR(status);
7750 return lseg;
b1f69b75
AA		 7751}
7752
cbe82603
BH		 7753static void
7754nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7755{
7756 struct nfs4_layoutreturn *lrp = calldata;
7757
7758 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7759 nfs41_setup_sequence(lrp->clp->cl_session,
7760 &lrp->args.seq_args,
7761 &lrp->res.seq_res,
7762 task);
cbe82603
BH		 7763}
7764
7765static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7766{
7767 struct nfs4_layoutreturn *lrp = calldata;
7768 struct nfs_server *server;
7769
7770 dprintk("--> %s\n", __func__);
7771
6ba7db34 7772 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7773 return;
7774
7775 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7776 switch (task->tk_status) {
7777 default:
7778 task->tk_status = 0;
7779 case 0:
7780 break;
7781 case -NFS4ERR_DELAY:
8478eaa1 7782 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 7783 break;
d00c5d43 7784 rpc_restart_call_prepare(task);
cbe82603
BH		 7785 return;
7786 }
cbe82603
BH		 7787 dprintk("<-- %s\n", __func__);
7788}
7789
7790static void nfs4_layoutreturn_release(void *calldata)
7791{
7792 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7793 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7794
7795 dprintk("--> %s\n", __func__);
849b286f
TM		 7796 spin_lock(&lo->plh_inode->i_lock);
7797 if (lrp->res.lrs_present)
7798 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
e736a5b9 7799 clear_bit(NFS_LAYOUT_RETURN, &lo->plh_flags);
849b286f
TM		 7800 lo->plh_block_lgets--;
7801 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7802 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 7803 kfree(calldata);
7804 dprintk("<-- %s\n", __func__);
7805}
7806
7807static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7808 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7809 .rpc_call_done = nfs4_layoutreturn_done,
7810 .rpc_release = nfs4_layoutreturn_release,
7811};
7812
7813int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7814{
7815 struct rpc_task *task;
7816 struct rpc_message msg = {
7817 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7818 .rpc_argp = &lrp->args,
7819 .rpc_resp = &lrp->res,
9556000d 7820 .rpc_cred = lrp->cred,
cbe82603
BH		 7821 };
7822 struct rpc_task_setup task_setup_data = {
1771c577 7823 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7824 .rpc_message = &msg,
7825 .callback_ops = &nfs4_layoutreturn_call_ops,
7826 .callback_data = lrp,
7827 };
7828 int status;
7829
7830 dprintk("--> %s\n", __func__);
a9c92d6b 7831 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7832 task = rpc_run_task(&task_setup_data);
7833 if (IS_ERR(task))
7834 return PTR_ERR(task);
7835 status = task->tk_status;
1037e6ea 7836 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7837 dprintk("<-- %s status=%d\n", __func__, status);
7838 rpc_put_task(task);
7839 return status;
7840}
7841
b1f69b75 7842static int
cd5875fe
TM		 7843_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7844 struct pnfs_device *pdev,
7845 struct rpc_cred *cred)
b1f69b75
AA		 7846{
7847 struct nfs4_getdeviceinfo_args args = {
7848 .pdev = pdev,
7849 };
7850 struct nfs4_getdeviceinfo_res res = {
7851 .pdev = pdev,
7852 };
7853 struct rpc_message msg = {
7854 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7855 .rpc_argp = &args,
7856 .rpc_resp = &res,
cd5875fe 7857 .rpc_cred = cred,
b1f69b75
AA		 7858 };
7859 int status;
7860
7861 dprintk("--> %s\n", __func__);
7c513058 7862 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7863 dprintk("<-- %s status=%d\n", __func__, status);
7864
7865 return status;
7866}
7867
cd5875fe
TM		 7868int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7869 struct pnfs_device *pdev,
7870 struct rpc_cred *cred)
b1f69b75
AA		 7871{
7872 struct nfs4_exception exception = { };
7873 int err;
7874
7875 do {
7876 err = nfs4_handle_exception(server,
cd5875fe 7877 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7878 &exception);
7879 } while (exception.retry);
7880 return err;
7881}
7882EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7883
863a3c6c
AA		 7884static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7885{
7886 struct nfs4_layoutcommit_data *data = calldata;
7887 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7888 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7889
d9afbd1b
TM		 7890 nfs41_setup_sequence(session,
7891 &data->args.seq_args,
7892 &data->res.seq_res,
7893 task);
863a3c6c
AA		 7894}
7895
7896static void
7897nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7898{
7899 struct nfs4_layoutcommit_data *data = calldata;
7900 struct nfs_server *server = NFS_SERVER(data->args.inode);
7901
6ba7db34 7902 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7903 return;
7904
7905 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7906 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7907 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7908 case -NFS4ERR_BADLAYOUT: /* no layout */
7909 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7910 task->tk_status = 0;
e59d27e0 7911 case 0:
e59d27e0
TM		 7912 break;
7913 default:
8478eaa1 7914 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 7915 rpc_restart_call_prepare(task);
7916 return;
7917 }
7918 }
863a3c6c
AA		 7919}
7920
7921static void nfs4_layoutcommit_release(void *calldata)
7922{
7923 struct nfs4_layoutcommit_data *data = calldata;
7924
db29c089 7925 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 7926 nfs_post_op_update_inode_force_wcc(data->args.inode,
7927 data->res.fattr);
863a3c6c
AA		 7928 put_rpccred(data->cred);
7929 kfree(data);
7930}
7931
7932static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7933 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7934 .rpc_call_done = nfs4_layoutcommit_done,
7935 .rpc_release = nfs4_layoutcommit_release,
7936};
7937
7938int
ef311537 7939nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7940{
7941 struct rpc_message msg = {
7942 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7943 .rpc_argp = &data->args,
7944 .rpc_resp = &data->res,
7945 .rpc_cred = data->cred,
7946 };
7947 struct rpc_task_setup task_setup_data = {
7948 .task = &data->task,
7949 .rpc_client = NFS_CLIENT(data->args.inode),
7950 .rpc_message = &msg,
7951 .callback_ops = &nfs4_layoutcommit_ops,
7952 .callback_data = data,
7953 .flags = RPC_TASK_ASYNC,
7954 };
7955 struct rpc_task *task;
7956 int status = 0;
7957
7958 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7959 "lbw: %llu inode %lu\n",
7960 data->task.tk_pid, sync,
7961 data->args.lastbytewritten,
7962 data->args.inode->i_ino);
7963
a9c92d6b 7964 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7965 task = rpc_run_task(&task_setup_data);
7966 if (IS_ERR(task))
7967 return PTR_ERR(task);
ef311537 7968 if (sync == false)
863a3c6c
AA		 7969 goto out;
7970 status = nfs4_wait_for_completion_rpc_task(task);
7971 if (status != 0)
7972 goto out;
7973 status = task->tk_status;
1037e6ea 7974 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7975out:
7976 dprintk("%s: status %d\n", __func__, status);
7977 rpc_put_task(task);
7978 return status;
7979}
fca78d6d 7980
97431204
AA		 7981/**
7982 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7983 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7984 */
fca78d6d
BS		 7985static int
7986_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 7987 struct nfs_fsinfo *info,
7988 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 7989{
7990 struct nfs41_secinfo_no_name_args args = {
7991 .style = SECINFO_STYLE_CURRENT_FH,
7992 };
7993 struct nfs4_secinfo_res res = {
7994 .flavors = flavors,
7995 };
7996 struct rpc_message msg = {
7997 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7998 .rpc_argp = &args,
7999 .rpc_resp = &res,
8000 };
b1b3e136 8001 struct rpc_clnt *clnt = server->client;
7cb852df 8002 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8003 int status;
8004
8005 if (use_integrity) {
8006 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8007 cred = nfs4_get_clid_cred(server->nfs_client);
8008 msg.rpc_cred = cred;
b1b3e136
WAA		 8009 }
8010
8011 dprintk("--> %s\n", __func__);
8012 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8013 &res.seq_res, 0);
8014 dprintk("<-- %s status=%d\n", __func__, status);
8015
7cb852df
WAA		 8016 if (cred)
8017 put_rpccred(cred);
b1b3e136
WAA		 8018
8019 return status;
fca78d6d
BS		 8020}
8021
8022static int
8023nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8024 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8025{
8026 struct nfs4_exception exception = { };
8027 int err;
8028 do {
b1b3e136
WAA		 8029 /* first try using integrity protection */
8030 err = -NFS4ERR_WRONGSEC;
8031
8032 /* try to use integrity protection with machine cred */
8033 if (_nfs4_is_integrity_protected(server->nfs_client))
8034 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8035 flavors, true);
8036
8037 /*
8038 * if unable to use integrity protection, or SECINFO with
8039 * integrity protection returns NFS4ERR_WRONGSEC (which is
8040 * disallowed by spec, but exists in deployed servers) use
8041 * the current filesystem's rpc_client and the user cred.
8042 */
8043 if (err == -NFS4ERR_WRONGSEC)
8044 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8045 flavors, false);
8046
fca78d6d
BS		 8047 switch (err) {
8048 case 0:
8049 case -NFS4ERR_WRONGSEC:
78b19bae 8050 case -ENOTSUPP:
05e9cfb4 8051 goto out;
fca78d6d
BS		 8052 default:
8053 err = nfs4_handle_exception(server, err, &exception);
8054 }
8055 } while (exception.retry);
05e9cfb4 8056out:
fca78d6d
BS		 8057 return err;
8058}
8059
8060static int
8061nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8062 struct nfs_fsinfo *info)
8063{
8064 int err;
8065 struct page *page;
367156d9 8066 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8067 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8068 struct nfs4_secinfo4 *secinfo;
8069 int i;
fca78d6d
BS		 8070
8071 page = alloc_page(GFP_KERNEL);
8072 if (!page) {
8073 err = -ENOMEM;
8074 goto out;
8075 }
8076
8077 flavors = page_address(page);
8078 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8079
8080 /*
8081 * Fall back on "guess and check" method if
8082 * the server doesn't support SECINFO_NO_NAME
8083 */
78b19bae 8084 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8085 err = nfs4_find_root_sec(server, fhandle, info);
8086 goto out_freepage;
8087 }
8088 if (err)
8089 goto out_freepage;
8090
58a8cf12
WAA		 8091 for (i = 0; i < flavors->num_flavors; i++) {
8092 secinfo = &flavors->flavors[i];
8093
8094 switch (secinfo->flavor) {
8095 case RPC_AUTH_NULL:
8096 case RPC_AUTH_UNIX:
8097 case RPC_AUTH_GSS:
8098 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8099 &secinfo->flavor_info);
8100 break;
8101 default:
8102 flavor = RPC_AUTH_MAXFLAVOR;
8103 break;
8104 }
8105
4d4b69dd
WAA		 8106 if (!nfs_auth_info_match(&server->auth_info, flavor))
8107 flavor = RPC_AUTH_MAXFLAVOR;
8108
58a8cf12
WAA		 8109 if (flavor != RPC_AUTH_MAXFLAVOR) {
8110 err = nfs4_lookup_root_sec(server, fhandle,
8111 info, flavor);
8112 if (!err)
8113 break;
8114 }
8115 }
8116
8117 if (flavor == RPC_AUTH_MAXFLAVOR)
8118 err = -EPERM;
fca78d6d
BS		 8119
8120out_freepage:
8121 put_page(page);
8122 if (err == -EACCES)
8123 return -EPERM;
8124out:
8125 return err;
8126}
1cab0652 8127
ab7cb0df
TM		 8128static int _nfs41_test_stateid(struct nfs_server *server,
8129 nfs4_stateid *stateid,
8130 struct rpc_cred *cred)
7d974794
BS		 8131{
8132 int status;
8133 struct nfs41_test_stateid_args args = {
1cab0652 8134 .stateid = stateid,
7d974794
BS		 8135 };
8136 struct nfs41_test_stateid_res res;
8137 struct rpc_message msg = {
8138 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8139 .rpc_argp = &args,
8140 .rpc_resp = &res,
ab7cb0df 8141 .rpc_cred = cred,
7d974794 8142 };
3787d506
WAA		 8143 struct rpc_clnt *rpc_client = server->client;
8144
8145 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8146 &rpc_client, &msg);
1cab0652 8147
38527b15 8148 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8149 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8150 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8151 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8152 &args.seq_args, &res.seq_res);
38527b15
CL		 8153 if (status != NFS_OK) {
8154 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8155 return status;
38527b15
CL		 8156 }
8157 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8158 return -res.status;
7d974794
BS		 8159}
8160
38527b15
CL		 8161/**
8162 * nfs41_test_stateid - perform a TEST_STATEID operation
8163 *
8164 * @server: server / transport on which to perform the operation
8165 * @stateid: state ID to test
ab7cb0df 8166 * @cred: credential
38527b15
CL		 8167 *
8168 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8169 * Otherwise a negative NFS4ERR value is returned if the operation
8170 * failed or the state ID is not currently valid.
8171 */
ab7cb0df
TM		 8172static int nfs41_test_stateid(struct nfs_server *server,
8173 nfs4_stateid *stateid,
8174 struct rpc_cred *cred)
7d974794
BS		 8175{
8176 struct nfs4_exception exception = { };
8177 int err;
8178 do {
ab7cb0df 8179 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8180 if (err != -NFS4ERR_DELAY)
8181 break;
8182 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8183 } while (exception.retry);
8184 return err;
8185}
9aeda35f 8186
7c1d5fae
TM		 8187struct nfs_free_stateid_data {
8188 struct nfs_server *server;
8189 struct nfs41_free_stateid_args args;
9aeda35f 8190 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8191};
8192
8193static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8194{
8195 struct nfs_free_stateid_data *data = calldata;
8196 nfs41_setup_sequence(nfs4_get_session(data->server),
8197 &data->args.seq_args,
8198 &data->res.seq_res,
8199 task);
8200}
8201
8202static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8203{
8204 struct nfs_free_stateid_data *data = calldata;
8205
8206 nfs41_sequence_done(task, &data->res.seq_res);
8207
8208 switch (task->tk_status) {
8209 case -NFS4ERR_DELAY:
8478eaa1 8210 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8211 rpc_restart_call_prepare(task);
8212 }
8213}
8214
8215static void nfs41_free_stateid_release(void *calldata)
8216{
8217 kfree(calldata);
8218}
8219
17f26b12 8220static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8221 .rpc_call_prepare = nfs41_free_stateid_prepare,
8222 .rpc_call_done = nfs41_free_stateid_done,
8223 .rpc_release = nfs41_free_stateid_release,
8224};
8225
8226static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8227 nfs4_stateid *stateid,
ab7cb0df 8228 struct rpc_cred *cred,
7c1d5fae
TM		 8229 bool privileged)
8230{
9aeda35f
BS		 8231 struct rpc_message msg = {
8232 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8233 .rpc_cred = cred,
9aeda35f 8234 };
7c1d5fae
TM		 8235 struct rpc_task_setup task_setup = {
8236 .rpc_client = server->client,
8237 .rpc_message = &msg,
8238 .callback_ops = &nfs41_free_stateid_ops,
8239 .flags = RPC_TASK_ASYNC,
8240 };
8241 struct nfs_free_stateid_data *data;
9aeda35f 8242
3787d506
WAA		 8243 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8244 &task_setup.rpc_client, &msg);
8245
38527b15 8246 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8247 data = kmalloc(sizeof(*data), GFP_NOFS);
8248 if (!data)
8249 return ERR_PTR(-ENOMEM);
8250 data->server = server;
8251 nfs4_stateid_copy(&data->args.stateid, stateid);
8252
8253 task_setup.callback_data = data;
8254
8255 msg.rpc_argp = &data->args;
8256 msg.rpc_resp = &data->res;
a9c92d6b 8257 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8258 if (privileged)
8259 nfs4_set_sequence_privileged(&data->args.seq_args);
8260
8261 return rpc_run_task(&task_setup);
9aeda35f
BS		 8262}
8263
38527b15
CL		 8264/**
8265 * nfs41_free_stateid - perform a FREE_STATEID operation
8266 *
8267 * @server: server / transport on which to perform the operation
8268 * @stateid: state ID to release
ab7cb0df 8269 * @cred: credential
38527b15
CL		 8270 *
8271 * Returns NFS_OK if the server freed "stateid". Otherwise a
8272 * negative NFS4ERR value is returned.
8273 */
ab7cb0df
TM		 8274static int nfs41_free_stateid(struct nfs_server *server,
8275 nfs4_stateid *stateid,
8276 struct rpc_cred *cred)
9aeda35f 8277{
7c1d5fae
TM		 8278 struct rpc_task *task;
8279 int ret;
8280
ab7cb0df 8281 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8282 if (IS_ERR(task))
8283 return PTR_ERR(task);
8284 ret = rpc_wait_for_completion_task(task);
8285 if (!ret)
8286 ret = task->tk_status;
8287 rpc_put_task(task);
8288 return ret;
9aeda35f 8289}
36281caa 8290
f1cdae87
JL		 8291static void
8292nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8293{
8294 struct rpc_task *task;
ab7cb0df 8295 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8296
ab7cb0df 8297 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8298 nfs4_free_lock_state(server, lsp);
8299 if (IS_ERR(task))
f1cdae87 8300 return;
c8b2d0bf 8301 rpc_put_task(task);
c8b2d0bf
TM		 8302}
8303
36281caa
TM		 8304static bool nfs41_match_stateid(const nfs4_stateid *s1,
8305 const nfs4_stateid *s2)
8306{
2d2f24ad 8307 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8308 return false;
8309
2d2f24ad 8310 if (s1->seqid == s2->seqid)
36281caa 8311 return true;
2d2f24ad 8312 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8313 return true;
8314
8315 return false;
8316}
8317
557134a3
AA		 8318#endif /* CONFIG_NFS_V4_1 */
8319
36281caa
TM		 8320static bool nfs4_match_stateid(const nfs4_stateid *s1,
8321 const nfs4_stateid *s2)
8322{
f597c537 8323 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8324}
8325
8326
17280175 8327static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8328 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8329 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8330 .recover_open = nfs4_open_reclaim,
8331 .recover_lock = nfs4_lock_reclaim,
591d71cb 8332 .establish_clid = nfs4_init_clientid,
05f4c350 8333 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8334};
8335
591d71cb 8336#if defined(CONFIG_NFS_V4_1)
17280175 8337static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8338 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8339 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8340 .recover_open = nfs4_open_reclaim,
8341 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8342 .establish_clid = nfs41_init_clientid,
fce5c838 8343 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8344 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8345};
8346#endif /* CONFIG_NFS_V4_1 */
8347
17280175 8348static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8349 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8350 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8351 .recover_open = nfs40_open_expired,
591d71cb
AA		 8352 .recover_lock = nfs4_lock_expired,
8353 .establish_clid = nfs4_init_clientid,
8354};
8355
8356#if defined(CONFIG_NFS_V4_1)
17280175 8357static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8358 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8359 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8360 .recover_open = nfs41_open_expired,
8361 .recover_lock = nfs41_lock_expired,
4d643d1d 8362 .establish_clid = nfs41_init_clientid,
1da177e4 8363};
591d71cb 8364#endif /* CONFIG_NFS_V4_1 */
1da177e4 8365
17280175 8366static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8367 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8368 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8369 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8370};
8371
8372#if defined(CONFIG_NFS_V4_1)
17280175 8373static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8374 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8375 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8376 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8377};
8378#endif
8379
ec011fe8 8380static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8381 .get_locations = _nfs40_proc_get_locations,
44c99933 8382 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8383};
8384
8385#if defined(CONFIG_NFS_V4_1)
8386static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8387 .get_locations = _nfs41_proc_get_locations,
44c99933 8388 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8389};
8390#endif /* CONFIG_NFS_V4_1 */
8391
97dc1359
TM		 8392static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8393 .minor_version = 0,
39c6daae
TM		 8394 .init_caps = NFS_CAP_READDIRPLUS
8395 | NFS_CAP_ATOMIC_OPEN
8396 | NFS_CAP_CHANGE_ATTR
8397 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8398 .init_client = nfs40_init_client,
8399 .shutdown_client = nfs40_shutdown_client,
36281caa 8400 .match_stateid = nfs4_match_stateid,
fca78d6d 8401 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8402 .free_lock_state = nfs4_release_lockowner,
9915ea7e 8403 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8404 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8405 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8406 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8407 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8408};
8409
8410#if defined(CONFIG_NFS_V4_1)
8411static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8412 .minor_version = 1,
39c6daae
TM		 8413 .init_caps = NFS_CAP_READDIRPLUS
8414 | NFS_CAP_ATOMIC_OPEN
8415 | NFS_CAP_CHANGE_ATTR
3b66486c 8416 | NFS_CAP_POSIX_LOCK
49f9a0fa 8417 | NFS_CAP_STATEID_NFSV41
e983120e 8418 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8419 .init_client = nfs41_init_client,
8420 .shutdown_client = nfs41_shutdown_client,
36281caa 8421 .match_stateid = nfs41_match_stateid,
fca78d6d 8422 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8423 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8424 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8425 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8426 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8427 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8428 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8429};
8430#endif
8431
42c2c424
SD		 8432#if defined(CONFIG_NFS_V4_2)
8433static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8434 .minor_version = 2,
7017310a
BS		 8435 .init_caps = NFS_CAP_READDIRPLUS
8436 | NFS_CAP_ATOMIC_OPEN
8437 | NFS_CAP_CHANGE_ATTR
8438 | NFS_CAP_POSIX_LOCK
8439 | NFS_CAP_STATEID_NFSV41
e983120e 8440 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8441 | NFS_CAP_ALLOCATE
624bd5b7 8442 | NFS_CAP_DEALLOCATE
e983120e 8443 | NFS_CAP_SEEK,
abf79bb3
CL		 8444 .init_client = nfs41_init_client,
8445 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8446 .match_stateid = nfs41_match_stateid,
8447 .find_root_sec = nfs41_find_root_sec,
7017310a 8448 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8449 .call_sync_ops = &nfs41_call_sync_ops,
42c2c424
SD		 8450 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8451 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8452 .state_renewal_ops = &nfs41_state_renewal_ops,
8453};
8454#endif
8455
97dc1359
TM		 8456const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8457 [0] = &nfs_v4_0_minor_ops,
8458#if defined(CONFIG_NFS_V4_1)
8459 [1] = &nfs_v4_1_minor_ops,
8460#endif
42c2c424
SD		 8461#if defined(CONFIG_NFS_V4_2)
8462 [2] = &nfs_v4_2_minor_ops,
8463#endif
97dc1359
TM		 8464};
8465
17f26b12 8466static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8467 .create = nfs_create,
8468 .lookup = nfs_lookup,
8469 .atomic_open = nfs_atomic_open,
8470 .link = nfs_link,
8471 .unlink = nfs_unlink,
8472 .symlink = nfs_symlink,
8473 .mkdir = nfs_mkdir,
8474 .rmdir = nfs_rmdir,
8475 .mknod = nfs_mknod,
8476 .rename = nfs_rename,
8477 .permission = nfs_permission,
8478 .getattr = nfs_getattr,
8479 .setattr = nfs_setattr,
8480 .getxattr = generic_getxattr,
8481 .setxattr = generic_setxattr,
8482 .listxattr = generic_listxattr,
8483 .removexattr = generic_removexattr,
8484};
8485
92e1d5be 8486static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8487 .permission = nfs_permission,
8488 .getattr = nfs_getattr,
8489 .setattr = nfs_setattr,
64c2ce8b
AK		 8490 .getxattr = generic_getxattr,
8491 .setxattr = generic_setxattr,
8492 .listxattr = generic_listxattr,
8493 .removexattr = generic_removexattr,
6b3b5496
BF		 8494};
8495
509de811 8496const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8497 .version = 4, /* protocol version */
8498 .dentry_ops = &nfs4_dentry_operations,
8499 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8500 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8501 .file_ops = &nfs4_file_operations,
1da177e4 8502 .getroot = nfs4_proc_get_root,
281cad46 8503 .submount = nfs4_submount,
ff9099f2 8504 .try_mount = nfs4_try_mount,
1da177e4
LT		 8505 .getattr = nfs4_proc_getattr,
8506 .setattr = nfs4_proc_setattr,
8507 .lookup = nfs4_proc_lookup,
8508 .access = nfs4_proc_access,
8509 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8510 .create = nfs4_proc_create,
8511 .remove = nfs4_proc_remove,
8512 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8513 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8514 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8515 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8516 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8517 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8518 .link = nfs4_proc_link,
8519 .symlink = nfs4_proc_symlink,
8520 .mkdir = nfs4_proc_mkdir,
8521 .rmdir = nfs4_proc_remove,
8522 .readdir = nfs4_proc_readdir,
8523 .mknod = nfs4_proc_mknod,
8524 .statfs = nfs4_proc_statfs,
8525 .fsinfo = nfs4_proc_fsinfo,
8526 .pathconf = nfs4_proc_pathconf,
e9326dca 8527 .set_capabilities = nfs4_server_capabilities,
1da177e4 8528 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8529 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8530 .read_setup = nfs4_proc_read_setup,
ec06c096 8531 .read_done = nfs4_read_done,
1da177e4 8532 .write_setup = nfs4_proc_write_setup,
788e7a89 8533 .write_done = nfs4_write_done,
1da177e4 8534 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8535 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8536 .commit_done = nfs4_commit_done,
1da177e4 8537 .lock = nfs4_proc_lock,
e50a1c2e 8538 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8539 .close_context = nfs4_close_context,
2b484297 8540 .open_context = nfs4_atomic_open,
011e2a7f 8541 .have_delegation = nfs4_have_delegation,
57ec14c5 8542 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8543 .alloc_client = nfs4_alloc_client,
45a52a02 8544 .init_client = nfs4_init_client,
cdb7eced 8545 .free_client = nfs4_free_client,
1179acc6
BS		 8546 .create_server = nfs4_create_server,
8547 .clone_server = nfs_clone_server,
1da177e4
LT		 8548};
8549
64c2ce8b
AK		 8550static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8551 .prefix = XATTR_NAME_NFSV4_ACL,
8552 .list = nfs4_xattr_list_nfs4_acl,
8553 .get = nfs4_xattr_get_nfs4_acl,
8554 .set = nfs4_xattr_set_nfs4_acl,
8555};
8556
8557const struct xattr_handler *nfs4_xattr_handlers[] = {
8558 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8559#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8560 &nfs4_xattr_nfs4_label_handler,
8561#endif
64c2ce8b
AK		 8562 NULL
8563};
8564
1da177e4
LT		 8565/*
8566 * Local variables:
8567 * c-basic-offset: 8
8568 * End:
8569 */
Linux 6.x block layer and io_uring tree(s)