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nfs: Remove unneeded casts in nfs
[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>
64c2ce8b 54#include <linux/xattr.h>
c7a360b0 55#include <linux/utsname.h>
d310310c 56#include <linux/freezer.h>
1da177e4 57
4ce79717 58#include "nfs4_fs.h"
1da177e4 59#include "delegation.h"
101070ca 60#include "internal.h"
006ea73e 61#include "iostat.h"
fc931582 62#include "callback.h"
b1f69b75 63#include "pnfs.h"
f092075d 64#include "netns.h"
40c64c26 65#include "nfs4idmap.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
ea96d1ec
AS		 188 | FATTR4_WORD1_TIME_MODIFY
189 | FATTR4_WORD1_MOUNTED_ON_FILEID,
aa9c2669
DQ		 190#ifdef CONFIG_NFS_V4_SECURITY_LABEL
191 FATTR4_WORD2_SECURITY_LABEL
192#endif
1da177e4
LT		 193};
194
1549210f
TM		 195static const u32 nfs4_pnfs_open_bitmap[3] = {
196 FATTR4_WORD0_TYPE
197 | FATTR4_WORD0_CHANGE
198 | FATTR4_WORD0_SIZE
199 | FATTR4_WORD0_FSID
200 | FATTR4_WORD0_FILEID,
201 FATTR4_WORD1_MODE
202 | FATTR4_WORD1_NUMLINKS
203 | FATTR4_WORD1_OWNER
204 | FATTR4_WORD1_OWNER_GROUP
205 | FATTR4_WORD1_RAWDEV
206 | FATTR4_WORD1_SPACE_USED
207 | FATTR4_WORD1_TIME_ACCESS
208 | FATTR4_WORD1_TIME_METADATA
209 | FATTR4_WORD1_TIME_MODIFY,
210 FATTR4_WORD2_MDSTHRESHOLD
211};
212
e23008ec
AA		 213static const u32 nfs4_open_noattr_bitmap[3] = {
214 FATTR4_WORD0_TYPE
215 | FATTR4_WORD0_CHANGE
216 | FATTR4_WORD0_FILEID,
217};
218
a09df2ca 219const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 220 FATTR4_WORD0_FILES_AVAIL
221 | FATTR4_WORD0_FILES_FREE
222 | FATTR4_WORD0_FILES_TOTAL,
223 FATTR4_WORD1_SPACE_AVAIL
224 | FATTR4_WORD1_SPACE_FREE
225 | FATTR4_WORD1_SPACE_TOTAL
226};
227
a09df2ca 228const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 229 FATTR4_WORD0_MAXLINK
230 | FATTR4_WORD0_MAXNAME,
231 0
232};
233
dae100c2 234const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 235 | FATTR4_WORD0_MAXREAD
236 | FATTR4_WORD0_MAXWRITE
237 | FATTR4_WORD0_LEASE_TIME,
55b6e774 238 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 239 | FATTR4_WORD1_FS_LAYOUT_TYPES,
240 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 241};
242
a09df2ca 243const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 244 FATTR4_WORD0_TYPE
245 | FATTR4_WORD0_CHANGE
246 | FATTR4_WORD0_SIZE
247 | FATTR4_WORD0_FSID
248 | FATTR4_WORD0_FILEID
249 | FATTR4_WORD0_FS_LOCATIONS,
250 FATTR4_WORD1_MODE
251 | FATTR4_WORD1_NUMLINKS
252 | FATTR4_WORD1_OWNER
253 | FATTR4_WORD1_OWNER_GROUP
254 | FATTR4_WORD1_RAWDEV
255 | FATTR4_WORD1_SPACE_USED
256 | FATTR4_WORD1_TIME_ACCESS
257 | FATTR4_WORD1_TIME_METADATA
258 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 259 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 260};
261
bc4785cd 262static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 263 struct nfs4_readdir_arg *readdir)
264{
0dbb4c67 265 __be32 *start, *p;
1da177e4 266
1da177e4 267 if (cookie > 2) {
b7ef1956 268 readdir->cookie = cookie;
1da177e4
LT		 269 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
270 return;
271 }
272
273 readdir->cookie = 0;
274 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
275 if (cookie == 2)
276 return;
277
278 /*
279 * NFSv4 servers do not return entries for '.' and '..'
280 * Therefore, we fake these entries here. We let '.'
281 * have cookie 0 and '..' have cookie 1. Note that
282 * when talking to the server, we always send cookie 0
283 * instead of 1 or 2.
284 */
2b86ce2d 285 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 286
287 if (cookie == 0) {
288 *p++ = xdr_one; /* next */
289 *p++ = xdr_zero; /* cookie, first word */
290 *p++ = xdr_one; /* cookie, second word */
291 *p++ = xdr_one; /* entry len */
292 memcpy(p, ".\0\0\0", 4); /* entry */
293 p++;
294 *p++ = xdr_one; /* bitmap length */
295 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
296 *p++ = htonl(8); /* attribute buffer length */
4e769b93 297 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 298 }
299
300 *p++ = xdr_one; /* next */
301 *p++ = xdr_zero; /* cookie, first word */
302 *p++ = xdr_two; /* cookie, second word */
303 *p++ = xdr_two; /* entry len */
304 memcpy(p, "..\0\0", 4); /* entry */
305 p++;
306 *p++ = xdr_one; /* bitmap length */
307 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
308 *p++ = htonl(8); /* attribute buffer length */
4e769b93 309 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 310
311 readdir->pgbase = (char *)p - (char *)start;
312 readdir->count -= readdir->pgbase;
2b86ce2d 313 kunmap_atomic(start);
1da177e4
LT		 314}
315
8478eaa1
N		 316static long nfs4_update_delay(long *timeout)
317{
318 long ret;
319 if (!timeout)
320 return NFS4_POLL_RETRY_MAX;
321 if (*timeout <= 0)
322 *timeout = NFS4_POLL_RETRY_MIN;
323 if (*timeout > NFS4_POLL_RETRY_MAX)
324 *timeout = NFS4_POLL_RETRY_MAX;
325 ret = *timeout;
326 *timeout <<= 1;
327 return ret;
328}
329
65de872e
TM		 330static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
331{
332 int res = 0;
333
334 might_sleep();
335
8478eaa1
N		 336 freezable_schedule_timeout_killable_unsafe(
337 nfs4_update_delay(timeout));
65de872e
TM		 338 if (fatal_signal_pending(current))
339 res = -ERESTARTSYS;
65de872e
TM		 340 return res;
341}
342
343/* This is the error handling routine for processes that are allowed
344 * to sleep.
345 */
f4ac1674 346int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 347{
348 struct nfs_client *clp = server->nfs_client;
9e33bed5 349 struct nfs4_state *state = exception->state;
3114ea7a 350 struct inode *inode = exception->inode;
65de872e
TM		 351 int ret = errorcode;
352
353 exception->retry = 0;
354 switch(errorcode) {
355 case 0:
356 return 0;
3114ea7a 357 case -NFS4ERR_OPENMODE:
011e2a7f 358 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 359 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 360 exception->retry = 1;
361 return 0;
362 }
363 if (state == NULL)
364 break;
5d422301
TM		 365 ret = nfs4_schedule_stateid_recovery(server, state);
366 if (ret < 0)
367 break;
3114ea7a 368 goto wait_on_recovery;
a1d0b5ee 369 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 370 case -NFS4ERR_ADMIN_REVOKED:
371 case -NFS4ERR_BAD_STATEID:
9e33bed5
TM		 372 if (state == NULL)
373 break;
5d422301
TM		 374 ret = nfs4_schedule_stateid_recovery(server, state);
375 if (ret < 0)
376 break;
0400a6b0 377 goto wait_on_recovery;
0ced63d1 378 case -NFS4ERR_EXPIRED:
5d422301
TM		 379 if (state != NULL) {
380 ret = nfs4_schedule_stateid_recovery(server, state);
381 if (ret < 0)
382 break;
383 }
65de872e 384 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 385 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 386 nfs4_schedule_lease_recovery(clp);
387 goto wait_on_recovery;
519ae255
CL		 388 case -NFS4ERR_MOVED:
389 ret = nfs4_schedule_migration_recovery(server);
390 if (ret < 0)
391 break;
392 goto wait_on_recovery;
8ef2f8d4
CL		 393 case -NFS4ERR_LEASE_MOVED:
394 nfs4_schedule_lease_moved_recovery(clp);
395 goto wait_on_recovery;
03391693 396#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 397 case -NFS4ERR_BADSESSION:
398 case -NFS4ERR_BADSLOT:
399 case -NFS4ERR_BAD_HIGH_SLOT:
400 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
401 case -NFS4ERR_DEADSESSION:
402 case -NFS4ERR_SEQ_FALSE_RETRY:
403 case -NFS4ERR_SEQ_MISORDERED:
404 dprintk("%s ERROR: %d Reset session\n", __func__,
405 errorcode);
9f594791 406 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 407 goto wait_on_recovery;
03391693 408#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 409 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 410 if (exception->timeout > HZ) {
411 /* We have retried a decent amount, time to
412 * fail
413 */
414 ret = -EBUSY;
415 break;
416 }
65de872e
TM		 417 case -NFS4ERR_GRACE:
418 case -NFS4ERR_DELAY:
419 ret = nfs4_delay(server->client, &exception->timeout);
420 if (ret != 0)
421 break;
a8a4ae3a 422 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 423 case -NFS4ERR_OLD_STATEID:
424 exception->retry = 1;
b064eca2
TM		 425 break;
426 case -NFS4ERR_BADOWNER:
427 /* The following works around a Linux server bug! */
428 case -NFS4ERR_BADNAME:
429 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
430 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
431 exception->retry = 1;
432 printk(KERN_WARNING "NFS: v4 server %s "
433 "does not accept raw "
434 "uid/gids. "
435 "Reenabling the idmapper.\n",
436 server->nfs_client->cl_hostname);
437 }
65de872e
TM		 438 }
439 /* We failed to handle the error */
440 return nfs4_map_errors(ret);
0400a6b0 441wait_on_recovery:
a2c0b9e2 442 ret = nfs4_wait_clnt_recover(clp);
519ae255
CL		 443 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
444 return -EIO;
a2c0b9e2
TM		 445 if (ret == 0)
446 exception->retry = 1;
447 return ret;
65de872e
TM		 448}
449
a5250def
WAA		 450/*
451 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
452 * or 'false' otherwise.
453 */
454static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
455{
456 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
457
458 if (flavor == RPC_AUTH_GSS_KRB5I ||
459 flavor == RPC_AUTH_GSS_KRB5P)
460 return true;
461
462 return false;
463}
65de872e 464
452e9352 465static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 466{
1da177e4
LT		 467 spin_lock(&clp->cl_lock);
468 if (time_before(clp->cl_last_renewal,timestamp))
469 clp->cl_last_renewal = timestamp;
470 spin_unlock(&clp->cl_lock);
471}
472
452e9352
TM		 473static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
474{
475 do_renew_lease(server->nfs_client, timestamp);
476}
477
2a3eb2b9
CL		 478struct nfs4_call_sync_data {
479 const struct nfs_server *seq_server;
480 struct nfs4_sequence_args *seq_args;
481 struct nfs4_sequence_res *seq_res;
482};
483
a9c92d6b
CL		 484static void nfs4_init_sequence(struct nfs4_sequence_args *args,
485 struct nfs4_sequence_res *res, int cache_reply)
486{
487 args->sa_slot = NULL;
488 args->sa_cache_this = cache_reply;
489 args->sa_privileged = 0;
490
491 res->sr_slot = NULL;
492}
493
494static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
495{
496 args->sa_privileged = 1;
497}
498
cb04ad2a
PT		 499int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
500 struct nfs4_sequence_args *args,
501 struct nfs4_sequence_res *res,
502 struct rpc_task *task)
3bd2384a 503{
3bd2384a
CL		 504 struct nfs4_slot *slot;
505
506 /* slot already allocated? */
507 if (res->sr_slot != NULL)
508 goto out_start;
509
510 spin_lock(&tbl->slot_tbl_lock);
511 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
512 goto out_sleep;
513
514 slot = nfs4_alloc_slot(tbl);
515 if (IS_ERR(slot)) {
516 if (slot == ERR_PTR(-ENOMEM))
517 task->tk_timeout = HZ >> 2;
518 goto out_sleep;
519 }
520 spin_unlock(&tbl->slot_tbl_lock);
521
522 args->sa_slot = slot;
523 res->sr_slot = slot;
524
525out_start:
526 rpc_call_start(task);
527 return 0;
528
529out_sleep:
530 if (args->sa_privileged)
531 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
532 NULL, RPC_PRIORITY_PRIVILEGED);
533 else
534 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
535 spin_unlock(&tbl->slot_tbl_lock);
536 return -EAGAIN;
537}
cb04ad2a 538EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
3bd2384a
CL		 539
540static int nfs40_sequence_done(struct rpc_task *task,
541 struct nfs4_sequence_res *res)
542{
543 struct nfs4_slot *slot = res->sr_slot;
544 struct nfs4_slot_table *tbl;
545
cab92c19 546 if (slot == NULL)
3bd2384a
CL		 547 goto out;
548
549 tbl = slot->table;
550 spin_lock(&tbl->slot_tbl_lock);
551 if (!nfs41_wake_and_assign_slot(tbl, slot))
552 nfs4_free_slot(tbl, slot);
553 spin_unlock(&tbl->slot_tbl_lock);
554
555 res->sr_slot = NULL;
556out:
557 return 1;
558}
559
cccef3b9
AA		 560#if defined(CONFIG_NFS_V4_1)
561
d185a334 562static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 563{
e3725ec0 564 struct nfs4_session *session;
13615871 565 struct nfs4_slot_table *tbl;
a13ce7c6 566 struct nfs4_slot *slot = res->sr_slot;
c10e4498 567 bool send_new_highest_used_slotid = false;
13615871 568
a13ce7c6 569 tbl = slot->table;
e3725ec0 570 session = tbl->session;
ea028ac9 571
35dc1d74 572 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 573 /* Be nice to the server: try to ensure that the last transmitted
574 * value for highest_user_slotid <= target_highest_slotid
575 */
576 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
577 send_new_highest_used_slotid = true;
578
a13ce7c6 579 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 580 send_new_highest_used_slotid = false;
581 goto out_unlock;
582 }
a13ce7c6 583 nfs4_free_slot(tbl, slot);
c10e4498
TM		 584
585 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
586 send_new_highest_used_slotid = false;
b75ad4cd 587out_unlock:
35dc1d74 588 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 589 res->sr_slot = NULL;
c10e4498
TM		 590 if (send_new_highest_used_slotid)
591 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 592}
593
f9c96fcc 594int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 595{
e3725ec0 596 struct nfs4_session *session;
a13ce7c6 597 struct nfs4_slot *slot = res->sr_slot;
14516c3a 598 struct nfs_client *clp;
ac20d163 599 bool interrupted = false;
85563073 600 int ret = 1;
b0df806c 601
a13ce7c6
TM		 602 if (slot == NULL)
603 goto out_noaction;
468f8613
BS		 604 /* don't increment the sequence number if the task wasn't sent */
605 if (!RPC_WAS_SENT(task))
b0df806c
AA		 606 goto out;
607
e3725ec0 608 session = slot->table->session;
933602e3 609
ac20d163
TM		 610 if (slot->interrupted) {
611 slot->interrupted = 0;
612 interrupted = true;
613 }
614
2f92ae34 615 trace_nfs4_sequence_done(session, res);
691daf3b 616 /* Check the SEQUENCE operation status */
14516c3a
TM		 617 switch (res->sr_status) {
618 case 0:
b0df806c 619 /* Update the slot's sequence and clientid lease timer */
933602e3 620 ++slot->seq_nr;
e3725ec0 621 clp = session->clp;
8e63b6a8 622 do_renew_lease(clp, res->sr_timestamp);
0629e370 623 /* Check sequence flags */
b4410c2f
TM		 624 if (res->sr_status_flags != 0)
625 nfs4_schedule_lease_recovery(clp);
464ee9f9 626 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 627 break;
ac20d163
TM		 628 case 1:
629 /*
630 * sr_status remains 1 if an RPC level error occurred.
631 * The server may or may not have processed the sequence
632 * operation..
633 * Mark the slot as having hosted an interrupted RPC call.
634 */
635 slot->interrupted = 1;
636 goto out;
14516c3a
TM		 637 case -NFS4ERR_DELAY:
638 /* The server detected a resend of the RPC call and
639 * returned NFS4ERR_DELAY as per Section 2.10.6.2
640 * of RFC5661.
641 */
df2fabff 642 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 643 __func__,
df2fabff 644 slot->slot_nr,
933602e3 645 slot->seq_nr);
14516c3a 646 goto out_retry;
85563073
TM		 647 case -NFS4ERR_BADSLOT:
648 /*
649 * The slot id we used was probably retired. Try again
650 * using a different slot id.
651 */
e8794440
TM		 652 goto retry_nowait;
653 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 654 /*
655 * Was the last operation on this sequence interrupted?
656 * If so, retry after bumping the sequence number.
657 */
658 if (interrupted) {
659 ++slot->seq_nr;
660 goto retry_nowait;
661 }
e8794440
TM		 662 /*
663 * Could this slot have been previously retired?
664 * If so, then the server may be expecting seq_nr = 1!
665 */
8e63b6a8
TM		 666 if (slot->seq_nr != 1) {
667 slot->seq_nr = 1;
668 goto retry_nowait;
669 }
670 break;
e8794440
TM		 671 case -NFS4ERR_SEQ_FALSE_RETRY:
672 ++slot->seq_nr;
673 goto retry_nowait;
14516c3a
TM		 674 default:
675 /* Just update the slot sequence no. */
933602e3 676 ++slot->seq_nr;
b0df806c
AA		 677 }
678out:
679 /* The session may be reset by one of the error handlers. */
680 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 681 nfs41_sequence_free_slot(res);
a13ce7c6 682out_noaction:
85563073 683 return ret;
e8794440
TM		 684retry_nowait:
685 if (rpc_restart_call_prepare(task)) {
686 task->tk_status = 0;
687 ret = 0;
688 }
689 goto out;
14516c3a 690out_retry:
d05dd4e9 691 if (!rpc_restart_call(task))
14516c3a
TM		 692 goto out;
693 rpc_delay(task, NFS4_POLL_RETRY_MAX);
694 return 0;
b0df806c 695}
f9c96fcc 696EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 697
2c4b131d 698int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 699{
e3725ec0 700 if (res->sr_slot == NULL)
14516c3a 701 return 1;
3bd2384a
CL		 702 if (!res->sr_slot->table->session)
703 return nfs40_sequence_done(task, res);
14516c3a 704 return nfs41_sequence_done(task, res);
df896455 705}
2c4b131d 706EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 707
dc70d7b3 708int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 709 struct nfs4_sequence_args *args,
710 struct nfs4_sequence_res *res,
ce5039c1
AA		 711 struct rpc_task *task)
712{
fbcd4abc
AA		 713 struct nfs4_slot *slot;
714 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 715
716 dprintk("--> %s\n", __func__);
ce5039c1 717 /* slot already allocated? */
dfb4f309 718 if (res->sr_slot != NULL)
d9afbd1b 719 goto out_success;
ce5039c1 720
fbcd4abc
AA		 721 tbl = &session->fc_slot_table;
722
69d206b5
TM		 723 task->tk_timeout = 0;
724
fbcd4abc 725 spin_lock(&tbl->slot_tbl_lock);
774d5f14 726 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 727 !args->sa_privileged) {
0b1c8fc4 728 /* The state manager will wait until the slot table is empty */
0b1c8fc4 729 dprintk("%s session is draining\n", __func__);
7b939a3f 730 goto out_sleep;
689cf5c1
AB		 731 }
732
2dc03b7f 733 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 734 if (IS_ERR(slot)) {
735 /* If out of memory, try again in 1/4 second */
736 if (slot == ERR_PTR(-ENOMEM))
737 task->tk_timeout = HZ >> 2;
fbcd4abc 738 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 739 goto out_sleep;
fbcd4abc
AA		 740 }
741 spin_unlock(&tbl->slot_tbl_lock);
742
2b2fa717 743 args->sa_slot = slot;
fbcd4abc 744
e8d92382 745 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 746 slot->slot_nr, slot->seq_nr);
fbcd4abc 747
dfb4f309 748 res->sr_slot = slot;
8e63b6a8 749 res->sr_timestamp = jiffies;
2a6e26cd 750 res->sr_status_flags = 0;
fbcd4abc
AA		 751 /*
752 * sr_status is only set in decode_sequence, and so will remain
753 * set to 1 if an rpc level failure occurs.
754 */
755 res->sr_status = 1;
2f92ae34 756 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 757out_success:
758 rpc_call_start(task);
ce5039c1 759 return 0;
7b939a3f 760out_sleep:
8fe72bac
TM		 761 /* Privileged tasks are queued with top priority */
762 if (args->sa_privileged)
1e1093c7
TM		 763 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
764 NULL, RPC_PRIORITY_PRIVILEGED);
765 else
766 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 767 spin_unlock(&tbl->slot_tbl_lock);
768 return -EAGAIN;
ce5039c1 769}
dc70d7b3 770EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 771
5a580e0a
CL		 772static int nfs4_setup_sequence(const struct nfs_server *server,
773 struct nfs4_sequence_args *args,
774 struct nfs4_sequence_res *res,
775 struct rpc_task *task)
ce5039c1 776{
035168ab 777 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 778 int ret = 0;
779
3bd2384a 780 if (!session)
cb04ad2a
PT		 781 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
782 args, res, task);
035168ab 783
e8d92382 784 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 785 __func__, session->clp, session, res->sr_slot ?
e8d92382 786 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 787
9d12b216 788 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 789
ce5039c1
AA		 790 dprintk("<-- %s status=%d\n", __func__, ret);
791 return ret;
792}
793
ce5039c1
AA		 794static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
795{
2a3eb2b9 796 struct nfs4_call_sync_data *data = calldata;
6ba7db34 797 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 798
035168ab
TM		 799 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
800
d9afbd1b 801 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 802}
803
69ab40c4
AA		 804static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
805{
2a3eb2b9 806 struct nfs4_call_sync_data *data = calldata;
69ab40c4 807
14516c3a 808 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 809}
810
17280175 811static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 812 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 813 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 814};
815
3bd2384a
CL		 816#else /* !CONFIG_NFS_V4_1 */
817
9915ea7e
CL		 818static int nfs4_setup_sequence(const struct nfs_server *server,
819 struct nfs4_sequence_args *args,
820 struct nfs4_sequence_res *res,
821 struct rpc_task *task)
822{
cb04ad2a
PT		 823 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
824 args, res, task);
9915ea7e
CL		 825}
826
2c4b131d
PT		 827int nfs4_sequence_done(struct rpc_task *task,
828 struct nfs4_sequence_res *res)
9915ea7e 829{
3bd2384a 830 return nfs40_sequence_done(task, res);
9915ea7e 831}
2c4b131d 832EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 833
834#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 835
836static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
837{
838 struct nfs4_call_sync_data *data = calldata;
839 nfs4_setup_sequence(data->seq_server,
840 data->seq_args, data->seq_res, task);
841}
842
843static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
844{
845 struct nfs4_call_sync_data *data = calldata;
846 nfs4_sequence_done(task, data->seq_res);
847}
848
849static const struct rpc_call_ops nfs40_call_sync_ops = {
850 .rpc_call_prepare = nfs40_call_sync_prepare,
851 .rpc_call_done = nfs40_call_sync_done,
852};
853
7c513058
BS		 854static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
855 struct nfs_server *server,
ce5039c1
AA		 856 struct rpc_message *msg,
857 struct nfs4_sequence_args *args,
8fe72bac 858 struct nfs4_sequence_res *res)
ce5039c1
AA		 859{
860 int ret;
861 struct rpc_task *task;
9915ea7e 862 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 863 struct nfs4_call_sync_data data = {
035168ab 864 .seq_server = server,
ce5039c1
AA		 865 .seq_args = args,
866 .seq_res = res,
ce5039c1
AA		 867 };
868 struct rpc_task_setup task_setup = {
7c513058 869 .rpc_client = clnt,
ce5039c1 870 .rpc_message = msg,
9915ea7e 871 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 872 .callback_data = &data
873 };
874
ce5039c1
AA		 875 task = rpc_run_task(&task_setup);
876 if (IS_ERR(task))
877 ret = PTR_ERR(task);
878 else {
879 ret = task->tk_status;
880 rpc_put_task(task);
881 }
882 return ret;
883}
884
7c513058
BS		 885int nfs4_call_sync(struct rpc_clnt *clnt,
886 struct nfs_server *server,
e73b83f2
BS		 887 struct rpc_message *msg,
888 struct nfs4_sequence_args *args,
889 struct nfs4_sequence_res *res,
890 int cache_reply)
891{
a9c92d6b 892 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 893 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 894}
cccef3b9 895
38478b24 896static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 897{
38478b24 898 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 899
38478b24 900 spin_lock(&dir->i_lock);
359d7d1c 901 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 902 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 903 nfs_force_lookup_revalidate(dir);
a9a4a87a 904 dir->i_version = cinfo->after;
3235b403 905 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 906 nfs_fscache_invalidate(dir);
38478b24 907 spin_unlock(&dir->i_lock);
1da177e4
LT		 908}
909
e56e0b78 910struct nfs4_opendata {
c6d00e63 911 struct kref kref;
e56e0b78
TM		 912 struct nfs_openargs o_arg;
913 struct nfs_openres o_res;
cdd4e68b
TM		 914 struct nfs_open_confirmargs c_arg;
915 struct nfs_open_confirmres c_res;
6926afd1
TM		 916 struct nfs4_string owner_name;
917 struct nfs4_string group_name;
e56e0b78 918 struct nfs_fattr f_attr;
1775fd3e 919 struct nfs4_label *f_label;
e56e0b78 920 struct dentry *dir;
82a2c1b7 921 struct dentry *dentry;
e56e0b78 922 struct nfs4_state_owner *owner;
aac00a8d 923 struct nfs4_state *state;
e56e0b78 924 struct iattr attrs;
26e976a8 925 unsigned long timestamp;
3e309914 926 unsigned int rpc_done : 1;
5bc2afc2 927 unsigned int file_created : 1;
bdeca1b7 928 unsigned int is_recover : 1;
24ac23ab
TM		 929 int rpc_status;
930 int cancelled;
e56e0b78
TM		 931};
932
49f9a0fa
TM		 933static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
934 int err, struct nfs4_exception *exception)
935{
936 if (err != -EINVAL)
937 return false;
938 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
939 return false;
940 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
941 exception->retry = 1;
942 return true;
943}
944
6ae37339
TM		 945static u32
946nfs4_map_atomic_open_share(struct nfs_server *server,
947 fmode_t fmode, int openflags)
948{
949 u32 res = 0;
950
951 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
952 case FMODE_READ:
953 res = NFS4_SHARE_ACCESS_READ;
954 break;
955 case FMODE_WRITE:
956 res = NFS4_SHARE_ACCESS_WRITE;
957 break;
958 case FMODE_READ|FMODE_WRITE:
959 res = NFS4_SHARE_ACCESS_BOTH;
960 }
961 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
962 goto out;
963 /* Want no delegation if we're using O_DIRECT */
964 if (openflags & O_DIRECT)
965 res |= NFS4_SHARE_WANT_NO_DELEG;
966out:
967 return res;
968}
969
49f9a0fa
TM		 970static enum open_claim_type4
971nfs4_map_atomic_open_claim(struct nfs_server *server,
972 enum open_claim_type4 claim)
973{
974 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
975 return claim;
976 switch (claim) {
977 default:
978 return claim;
979 case NFS4_OPEN_CLAIM_FH:
980 return NFS4_OPEN_CLAIM_NULL;
981 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
982 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
983 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
984 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
985 }
986}
2ced46c2
TM		 987
988static void nfs4_init_opendata_res(struct nfs4_opendata *p)
989{
990 p->o_res.f_attr = &p->f_attr;
1775fd3e 991 p->o_res.f_label = p->f_label;
c1d51931
TM		 992 p->o_res.seqid = p->o_arg.seqid;
993 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 994 p->o_res.server = p->o_arg.server;
5f657530 995 p->o_res.access_request = p->o_arg.access;
2ced46c2 996 nfs_fattr_init(&p->f_attr);
6926afd1 997 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 998}
999
82a2c1b7 1000static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1001 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1002 const struct iattr *attrs,
1775fd3e 1003 struct nfs4_label *label,
4a1c0893 1004 enum open_claim_type4 claim,
8535b2be 1005 gfp_t gfp_mask)
e56e0b78 1006{
82a2c1b7 1007 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 1008 struct inode *dir = parent->d_inode;
1009 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1010 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1011 struct nfs4_opendata *p;
1012
8535b2be 1013 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1014 if (p == NULL)
1015 goto err;
14c43f76
DQ		 1016
1017 p->f_label = nfs4_label_alloc(server, gfp_mask);
1018 if (IS_ERR(p->f_label))
1019 goto err_free_p;
1020
63f5f796
TM		 1021 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1022 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1023 if (IS_ERR(p->o_arg.seqid))
14c43f76 1024 goto err_free_label;
82a2c1b7
AV		 1025 nfs_sb_active(dentry->d_sb);
1026 p->dentry = dget(dentry);
e56e0b78
TM		 1027 p->dir = parent;
1028 p->owner = sp;
1029 atomic_inc(&sp->so_count);
dc0b027d
TM		 1030 p->o_arg.open_flags = flags;
1031 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
6ae37339
TM		 1032 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1033 fmode, flags);
ae2bb032
WAA		 1034 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1035 * will return permission denied for all bits until close */
1036 if (!(flags & O_EXCL)) {
1037 /* ask server to check for all possible rights as results
1038 * are cached */
1039 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1040 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1041 }
7539bbab 1042 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1043 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1044 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1045 p->o_arg.name = &dentry->d_name;
e56e0b78 1046 p->o_arg.server = server;
aa9c2669 1047 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1048 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1049 p->o_arg.label = label;
49f9a0fa
TM		 1050 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1051 switch (p->o_arg.claim) {
4a1c0893
TM		 1052 case NFS4_OPEN_CLAIM_NULL:
1053 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1054 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1055 p->o_arg.fh = NFS_FH(dir);
1056 break;
1057 case NFS4_OPEN_CLAIM_PREVIOUS:
1058 case NFS4_OPEN_CLAIM_FH:
1059 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1060 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1061 p->o_arg.fh = NFS_FH(dentry->d_inode);
1062 }
536e43d1 1063 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1064 __u32 verf[2];
d77d76ff 1065
e56e0b78
TM		 1066 p->o_arg.u.attrs = &p->attrs;
1067 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1068
1069 verf[0] = jiffies;
1070 verf[1] = current->pid;
1071 memcpy(p->o_arg.u.verifier.data, verf,
1072 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1073 }
cdd4e68b
TM		 1074 p->c_arg.fh = &p->o_res.fh;
1075 p->c_arg.stateid = &p->o_res.stateid;
1076 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1077 nfs4_init_opendata_res(p);
c6d00e63 1078 kref_init(&p->kref);
e56e0b78 1079 return p;
14c43f76
DQ		 1080
1081err_free_label:
1082 nfs4_label_free(p->f_label);
1083err_free_p:
e56e0b78
TM		 1084 kfree(p);
1085err:
1086 dput(parent);
1087 return NULL;
1088}
1089
c6d00e63 1090static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1091{
c6d00e63
TM		 1092 struct nfs4_opendata *p = container_of(kref,
1093 struct nfs4_opendata, kref);
82a2c1b7 1094 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1095
1096 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1097 if (p->state != NULL)
1098 nfs4_put_open_state(p->state);
c6d00e63 1099 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1100
1101 nfs4_label_free(p->f_label);
1102
c6d00e63 1103 dput(p->dir);
82a2c1b7
AV		 1104 dput(p->dentry);
1105 nfs_sb_deactive(sb);
6926afd1 1106 nfs_fattr_free_names(&p->f_attr);
e911b815 1107 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1108 kfree(p);
1109}
1110
1111static void nfs4_opendata_put(struct nfs4_opendata *p)
1112{
1113 if (p != NULL)
1114 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1115}
1116
06f814a3
TM		 1117static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1118{
06f814a3
TM		 1119 int ret;
1120
06f814a3 1121 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1122 return ret;
1123}
1124
dc0b027d 1125static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1126{
1127 int ret = 0;
dc0b027d 1128
536e43d1 1129 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1130 goto out;
1131 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1132 case FMODE_READ:
88069f77
TM		 1133 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1134 && state->n_rdonly != 0;
6ee41268
TM		 1135 break;
1136 case FMODE_WRITE:
88069f77
TM		 1137 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1138 && state->n_wronly != 0;
6ee41268
TM		 1139 break;
1140 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1141 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1142 && state->n_rdwr != 0;
6ee41268 1143 }
dc0b027d 1144out:
6ee41268
TM		 1145 return ret;
1146}
1147
dc0b027d 1148static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1149{
652f89f6
TM		 1150 if (delegation == NULL)
1151 return 0;
dc0b027d 1152 if ((delegation->type & fmode) != fmode)
aac00a8d 1153 return 0;
d25be546
TM		 1154 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1155 return 0;
b7391f44 1156 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1157 return 1;
1158}
1159
dc0b027d 1160static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1161{
dc0b027d 1162 switch (fmode) {
e7616923
TM		 1163 case FMODE_WRITE:
1164 state->n_wronly++;
1165 break;
1166 case FMODE_READ:
1167 state->n_rdonly++;
1168 break;
1169 case FMODE_READ|FMODE_WRITE:
1170 state->n_rdwr++;
1171 }
dc0b027d 1172 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1173}
1174
4f14c194
TM		 1175static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1176{
1177 struct nfs_client *clp = state->owner->so_server->nfs_client;
1178 bool need_recover = false;
1179
1180 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1181 need_recover = true;
1182 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1183 need_recover = true;
1184 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1185 need_recover = true;
1186 if (need_recover)
1187 nfs4_state_mark_reclaim_nograce(clp, state);
1188}
1189
e999e80e
TM		 1190static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1191 nfs4_stateid *stateid)
1192{
1193 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1194 return true;
4f14c194
TM		 1195 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1196 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1197 return true;
4f14c194 1198 }
e999e80e
TM		 1199 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1200 return true;
1201 return false;
1202}
1203
f95549cf
TM		 1204static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1205{
1206 if (state->n_wronly)
1207 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1208 if (state->n_rdonly)
1209 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1210 if (state->n_rdwr)
1211 set_bit(NFS_O_RDWR_STATE, &state->flags);
1212}
1213
226056c5
TM		 1214static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1215 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1216{
226056c5
TM		 1217 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1218 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1219 case FMODE_WRITE:
1220 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1221 break;
1222 case FMODE_READ:
1223 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1224 break;
1225 case 0:
1226 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1227 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1228 clear_bit(NFS_OPEN_STATE, &state->flags);
1229 }
1230 if (stateid == NULL)
1231 return;
f95549cf
TM		 1232 /* Handle races with OPEN */
1233 if (!nfs4_stateid_match_other(stateid, &state->open_stateid) ||
1234 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1235 nfs_resync_open_stateid_locked(state);
226056c5 1236 return;
f95549cf 1237 }
003707c7 1238 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1239 nfs4_stateid_copy(&state->stateid, stateid);
1240 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1241}
1242
1243static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1244{
1245 write_seqlock(&state->seqlock);
1246 nfs_clear_open_stateid_locked(state, stateid, fmode);
1247 write_sequnlock(&state->seqlock);
4f14c194
TM		 1248 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1249 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1250}
1251
dc0b027d 1252static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1253{
dc0b027d 1254 switch (fmode) {
003707c7
TM		 1255 case FMODE_READ:
1256 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1257 break;
1258 case FMODE_WRITE:
1259 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1260 break;
1261 case FMODE_READ|FMODE_WRITE:
1262 set_bit(NFS_O_RDWR_STATE, &state->flags);
1263 }
e999e80e
TM		 1264 if (!nfs_need_update_open_stateid(state, stateid))
1265 return;
1266 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1267 nfs4_stateid_copy(&state->stateid, stateid);
1268 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1269}
1270
dc0b027d 1271static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1272{
8bda4e4c
TM		 1273 /*
1274 * Protect the call to nfs4_state_set_mode_locked and
1275 * serialise the stateid update
1276 */
1277 write_seqlock(&state->seqlock);
003707c7 1278 if (deleg_stateid != NULL) {
f597c537 1279 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1280 set_bit(NFS_DELEGATED_STATE, &state->flags);
1281 }
1282 if (open_stateid != NULL)
dc0b027d 1283 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1284 write_sequnlock(&state->seqlock);
1285 spin_lock(&state->owner->so_lock);
dc0b027d 1286 update_open_stateflags(state, fmode);
ec073428 1287 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1288}
1289
dc0b027d 1290static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1291{
1292 struct nfs_inode *nfsi = NFS_I(state->inode);
1293 struct nfs_delegation *deleg_cur;
1294 int ret = 0;
1295
dc0b027d 1296 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1297
1298 rcu_read_lock();
1299 deleg_cur = rcu_dereference(nfsi->delegation);
1300 if (deleg_cur == NULL)
1301 goto no_delegation;
1302
1303 spin_lock(&deleg_cur->lock);
17f26b12 1304 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1305 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1306 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1307 goto no_delegation_unlock;
1308
1309 if (delegation == NULL)
1310 delegation = &deleg_cur->stateid;
f597c537 1311 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1312 goto no_delegation_unlock;
1313
b7391f44 1314 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1315 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1316 ret = 1;
1317no_delegation_unlock:
1318 spin_unlock(&deleg_cur->lock);
1319no_delegation:
1320 rcu_read_unlock();
1321
1322 if (!ret && open_stateid != NULL) {
dc0b027d 1323 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1324 ret = 1;
1325 }
4f14c194
TM		 1326 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1327 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1328
1329 return ret;
1330}
1331
39071e6f
TM		 1332static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1333 const nfs4_stateid *stateid)
1334{
1335 struct nfs4_state *state = lsp->ls_state;
1336 bool ret = false;
1337
1338 spin_lock(&state->state_lock);
1339 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1340 goto out_noupdate;
1341 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1342 goto out_noupdate;
1343 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1344 ret = true;
1345out_noupdate:
1346 spin_unlock(&state->state_lock);
1347 return ret;
1348}
34310430 1349
dc0b027d 1350static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1351{
1352 struct nfs_delegation *delegation;
1353
1354 rcu_read_lock();
1355 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1356 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1357 rcu_read_unlock();
1358 return;
1359 }
1360 rcu_read_unlock();
57ec14c5 1361 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1362}
1363
6ee41268 1364static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1365{
1366 struct nfs4_state *state = opendata->state;
1367 struct nfs_inode *nfsi = NFS_I(state->inode);
1368 struct nfs_delegation *delegation;
f448badd 1369 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1370 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1371 nfs4_stateid stateid;
1372 int ret = -EAGAIN;
1373
aac00a8d 1374 for (;;) {
61beef75 1375 spin_lock(&state->owner->so_lock);
dc0b027d 1376 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1377 update_open_stateflags(state, fmode);
6ee41268 1378 spin_unlock(&state->owner->so_lock);
61beef75 1379 goto out_return_state;
6ee41268 1380 }
61beef75 1381 spin_unlock(&state->owner->so_lock);
34310430
TM		 1382 rcu_read_lock();
1383 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1384 if (!can_open_delegated(delegation, fmode)) {
34310430 1385 rcu_read_unlock();
aac00a8d 1386 break;
34310430 1387 }
aac00a8d 1388 /* Save the delegation */
f597c537 1389 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1390 rcu_read_unlock();
fa332941 1391 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1392 if (!opendata->is_recover) {
1393 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1394 if (ret != 0)
1395 goto out;
1396 }
aac00a8d 1397 ret = -EAGAIN;
34310430
TM		 1398
1399 /* Try to update the stateid using the delegation */
dc0b027d 1400 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1401 goto out_return_state;
aac00a8d 1402 }
aac00a8d
TM		 1403out:
1404 return ERR_PTR(ret);
1405out_return_state:
1406 atomic_inc(&state->count);
1407 return state;
1408}
1409
e23008ec
AA		 1410static void
1411nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1412{
1413 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1414 struct nfs_delegation *delegation;
1415 int delegation_flags = 0;
1416
1417 rcu_read_lock();
1418 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1419 if (delegation)
1420 delegation_flags = delegation->flags;
1421 rcu_read_unlock();
1422 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1423 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1424 "returning a delegation for "
1425 "OPEN(CLAIM_DELEGATE_CUR)\n",
1426 clp->cl_hostname);
1427 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1428 nfs_inode_set_delegation(state->inode,
1429 data->owner->so_cred,
1430 &data->o_res);
1431 else
1432 nfs_inode_reclaim_delegation(state->inode,
1433 data->owner->so_cred,
1434 &data->o_res);
1435}
1436
1437/*
1438 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1439 * and update the nfs4_state.
1440 */
1441static struct nfs4_state *
1442_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1443{
1444 struct inode *inode = data->state->inode;
1445 struct nfs4_state *state = data->state;
1446 int ret;
1447
d2bfda2e
WAA		 1448 if (!data->rpc_done) {
1449 if (data->rpc_status) {
1450 ret = data->rpc_status;
1451 goto err;
1452 }
1453 /* cached opens have already been processed */
1454 goto update;
e23008ec
AA		 1455 }
1456
e23008ec
AA		 1457 ret = nfs_refresh_inode(inode, &data->f_attr);
1458 if (ret)
1459 goto err;
1460
1461 if (data->o_res.delegation_type != 0)
1462 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1463update:
e23008ec
AA		 1464 update_open_stateid(state, &data->o_res.stateid, NULL,
1465 data->o_arg.fmode);
d49f042a 1466 atomic_inc(&state->count);
e23008ec
AA		 1467
1468 return state;
1469err:
1470 return ERR_PTR(ret);
1471
1472}
1473
1474static struct nfs4_state *
1475_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1476{
1477 struct inode *inode;
1478 struct nfs4_state *state = NULL;
1b370bc2 1479 int ret;
24ac23ab 1480
aac00a8d 1481 if (!data->rpc_done) {
6ee41268 1482 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1483 goto out;
1484 }
1485
1b370bc2 1486 ret = -EAGAIN;
24ac23ab 1487 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1488 goto err;
1775fd3e 1489 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1490 ret = PTR_ERR(inode);
03f28e3a 1491 if (IS_ERR(inode))
1b370bc2
TM		 1492 goto err;
1493 ret = -ENOMEM;
24ac23ab
TM		 1494 state = nfs4_get_open_state(inode, data->owner);
1495 if (state == NULL)
1b370bc2 1496 goto err_put_inode;
e23008ec
AA		 1497 if (data->o_res.delegation_type != 0)
1498 nfs4_opendata_check_deleg(data, state);
34310430 1499 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1500 data->o_arg.fmode);
24ac23ab 1501 iput(inode);
aac00a8d 1502out:
7aa262b5 1503 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1504 return state;
1b370bc2
TM		 1505err_put_inode:
1506 iput(inode);
1507err:
1508 return ERR_PTR(ret);
24ac23ab
TM		 1509}
1510
e23008ec
AA		 1511static struct nfs4_state *
1512nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1513{
1514 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1515 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1516 return _nfs4_opendata_to_nfs4_state(data);
1517}
1518
864472e9
TM		 1519static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1520{
1521 struct nfs_inode *nfsi = NFS_I(state->inode);
1522 struct nfs_open_context *ctx;
1523
1524 spin_lock(&state->inode->i_lock);
1525 list_for_each_entry(ctx, &nfsi->open_files, list) {
1526 if (ctx->state != state)
1527 continue;
1528 get_nfs_open_context(ctx);
1529 spin_unlock(&state->inode->i_lock);
1530 return ctx;
1531 }
1532 spin_unlock(&state->inode->i_lock);
1533 return ERR_PTR(-ENOENT);
1534}
1535
4a1c0893
TM		 1536static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1537 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1538{
1539 struct nfs4_opendata *opendata;
1540
4a1c0893 1541 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1542 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1543 if (opendata == NULL)
1544 return ERR_PTR(-ENOMEM);
1545 opendata->state = state;
1546 atomic_inc(&state->count);
1547 return opendata;
1548}
1549
dc0b027d 1550static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1551{
2ced46c2 1552 struct nfs4_state *newstate;
864472e9
TM		 1553 int ret;
1554
dc0b027d
TM		 1555 opendata->o_arg.open_flags = 0;
1556 opendata->o_arg.fmode = fmode;
be36e185
TM		 1557 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1558 NFS_SB(opendata->dentry->d_sb),
1559 fmode, 0);
2ced46c2
TM		 1560 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1561 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1562 nfs4_init_opendata_res(opendata);
b257957e 1563 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1564 if (ret != 0)
1565 return ret;
2ced46c2 1566 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1567 if (IS_ERR(newstate))
1568 return PTR_ERR(newstate);
643168c2 1569 nfs4_close_state(newstate, fmode);
2ced46c2 1570 *res = newstate;
864472e9
TM		 1571 return 0;
1572}
1573
1574static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1575{
864472e9 1576 struct nfs4_state *newstate;
864472e9
TM		 1577 int ret;
1578
4f14c194
TM		 1579 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1580 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1581 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1582 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1583 /* memory barrier prior to reading state->n_* */
2ced46c2 1584 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1585 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1586 smp_rmb();
1587 if (state->n_rdwr != 0) {
2ced46c2 1588 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1589 if (ret != 0)
1590 return ret;
2ced46c2
TM		 1591 if (newstate != state)
1592 return -ESTALE;
864472e9
TM		 1593 }
1594 if (state->n_wronly != 0) {
2ced46c2 1595 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1596 if (ret != 0)
1597 return ret;
2ced46c2
TM		 1598 if (newstate != state)
1599 return -ESTALE;
864472e9
TM		 1600 }
1601 if (state->n_rdonly != 0) {
2ced46c2 1602 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1603 if (ret != 0)
1604 return ret;
2ced46c2
TM		 1605 if (newstate != state)
1606 return -ESTALE;
864472e9 1607 }
1ac7e2fd
TM		 1608 /*
1609 * We may have performed cached opens for all three recoveries.
1610 * Check if we need to update the current stateid.
1611 */
1612 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1613 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1614 write_seqlock(&state->seqlock);
1ac7e2fd 1615 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1616 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1617 write_sequnlock(&state->seqlock);
1ac7e2fd 1618 }
864472e9
TM		 1619 return 0;
1620}
1621
1da177e4
LT		 1622/*
1623 * OPEN_RECLAIM:
1624 * reclaim state on the server after a reboot.
1da177e4 1625 */
539cd03a 1626static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1627{
1ac7e2fd 1628 struct nfs_delegation *delegation;
864472e9 1629 struct nfs4_opendata *opendata;
dc0b027d 1630 fmode_t delegation_type = 0;
1da177e4
LT		 1631 int status;
1632
4a1c0893
TM		 1633 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1634 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1635 if (IS_ERR(opendata))
1636 return PTR_ERR(opendata);
1ac7e2fd
TM		 1637 rcu_read_lock();
1638 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1639 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1640 delegation_type = delegation->type;
1ac7e2fd 1641 rcu_read_unlock();
864472e9
TM		 1642 opendata->o_arg.u.delegation_type = delegation_type;
1643 status = nfs4_open_recover(opendata, state);
c6d00e63 1644 nfs4_opendata_put(opendata);
1da177e4
LT		 1645 return status;
1646}
1647
539cd03a 1648static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1649{
1650 struct nfs_server *server = NFS_SERVER(state->inode);
1651 struct nfs4_exception exception = { };
1652 int err;
1653 do {
539cd03a 1654 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1655 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1656 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1657 continue;
168667c4 1658 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1659 break;
1660 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1661 } while (exception.retry);
1662 return err;
1663}
1664
864472e9
TM		 1665static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1666{
1667 struct nfs_open_context *ctx;
1668 int ret;
1669
1670 ctx = nfs4_state_find_open_context(state);
1671 if (IS_ERR(ctx))
91876b13 1672 return -EAGAIN;
539cd03a 1673 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1674 put_nfs_open_context(ctx);
1675 return ret;
1676}
1677
db4f2e63 1678static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1679{
be76b5b6
TM		 1680 switch (err) {
1681 default:
1682 printk(KERN_ERR "NFS: %s: unhandled error "
1683 "%d.\n", __func__, err);
1684 case 0:
1685 case -ENOENT:
1686 case -ESTALE:
1687 break;
1688 case -NFS4ERR_BADSESSION:
1689 case -NFS4ERR_BADSLOT:
1690 case -NFS4ERR_BAD_HIGH_SLOT:
1691 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1692 case -NFS4ERR_DEADSESSION:
1693 set_bit(NFS_DELEGATED_STATE, &state->flags);
1694 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1695 return -EAGAIN;
1696 case -NFS4ERR_STALE_CLIENTID:
1697 case -NFS4ERR_STALE_STATEID:
1698 set_bit(NFS_DELEGATED_STATE, &state->flags);
1699 case -NFS4ERR_EXPIRED:
1700 /* Don't recall a delegation if it was lost */
1701 nfs4_schedule_lease_recovery(server->nfs_client);
1702 return -EAGAIN;
352297b9
CL		 1703 case -NFS4ERR_MOVED:
1704 nfs4_schedule_migration_recovery(server);
1705 return -EAGAIN;
8ef2f8d4
CL		 1706 case -NFS4ERR_LEASE_MOVED:
1707 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1708 return -EAGAIN;
be76b5b6
TM		 1709 case -NFS4ERR_DELEG_REVOKED:
1710 case -NFS4ERR_ADMIN_REVOKED:
1711 case -NFS4ERR_BAD_STATEID:
db4f2e63 1712 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1713 nfs_inode_find_state_and_recover(state->inode,
1714 stateid);
1715 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1716 return -EAGAIN;
be76b5b6
TM		 1717 case -NFS4ERR_DELAY:
1718 case -NFS4ERR_GRACE:
1719 set_bit(NFS_DELEGATED_STATE, &state->flags);
1720 ssleep(1);
1721 return -EAGAIN;
db4f2e63
TM		 1722 case -ENOMEM:
1723 case -NFS4ERR_DENIED:
1724 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1725 return 0;
be76b5b6 1726 }
1da177e4
LT		 1727 return err;
1728}
1729
db4f2e63
TM		 1730int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1731{
1732 struct nfs_server *server = NFS_SERVER(state->inode);
1733 struct nfs4_opendata *opendata;
1734 int err;
1735
1736 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1737 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1738 if (IS_ERR(opendata))
1739 return PTR_ERR(opendata);
1740 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1741 err = nfs4_open_recover(opendata, state);
1742 nfs4_opendata_put(opendata);
1743 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1744}
1745
be05c860
CL		 1746static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1747{
1748 struct nfs4_opendata *data = calldata;
1749
cb04ad2a
PT		 1750 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1751 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1752}
1753
cdd4e68b
TM		 1754static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1755{
1756 struct nfs4_opendata *data = calldata;
1757
17ead6c8 1758 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1759
cdd4e68b 1760 data->rpc_status = task->tk_status;
26e976a8 1761 if (data->rpc_status == 0) {
f597c537 1762 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1763 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1764 renew_lease(data->o_res.server, data->timestamp);
3e309914 1765 data->rpc_done = 1;
26e976a8 1766 }
cdd4e68b
TM		 1767}
1768
1769static void nfs4_open_confirm_release(void *calldata)
1770{
1771 struct nfs4_opendata *data = calldata;
1772 struct nfs4_state *state = NULL;
1773
1774 /* If this request hasn't been cancelled, do nothing */
1775 if (data->cancelled == 0)
1776 goto out_free;
1777 /* In case of error, no cleanup! */
3e309914 1778 if (!data->rpc_done)
cdd4e68b 1779 goto out_free;
cdd4e68b 1780 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1781 if (!IS_ERR(state))
643168c2 1782 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1783out_free:
c6d00e63 1784 nfs4_opendata_put(data);
cdd4e68b
TM		 1785}
1786
1787static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1788 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1789 .rpc_call_done = nfs4_open_confirm_done,
1790 .rpc_release = nfs4_open_confirm_release,
1791};
1792
1793/*
1794 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1795 */
1796static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1797{
1798 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1799 struct rpc_task *task;
5138fde0
TM		 1800 struct rpc_message msg = {
1801 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1802 .rpc_argp = &data->c_arg,
1803 .rpc_resp = &data->c_res,
1804 .rpc_cred = data->owner->so_cred,
1805 };
c970aa85
TM		 1806 struct rpc_task_setup task_setup_data = {
1807 .rpc_client = server->client,
5138fde0 1808 .rpc_message = &msg,
c970aa85
TM		 1809 .callback_ops = &nfs4_open_confirm_ops,
1810 .callback_data = data,
101070ca 1811 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1812 .flags = RPC_TASK_ASYNC,
1813 };
1da177e4
LT		 1814 int status;
1815
17ead6c8 1816 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1817 kref_get(&data->kref);
3e309914
TM		 1818 data->rpc_done = 0;
1819 data->rpc_status = 0;
5138fde0 1820 data->timestamp = jiffies;
c970aa85 1821 task = rpc_run_task(&task_setup_data);
7a1218a2 1822 if (IS_ERR(task))
cdd4e68b 1823 return PTR_ERR(task);
cdd4e68b
TM		 1824 status = nfs4_wait_for_completion_rpc_task(task);
1825 if (status != 0) {
1826 data->cancelled = 1;
1827 smp_wmb();
1828 } else
1829 status = data->rpc_status;
e6b3c4db 1830 rpc_put_task(task);
1da177e4
LT		 1831 return status;
1832}
1833
24ac23ab 1834static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1835{
24ac23ab
TM		 1836 struct nfs4_opendata *data = calldata;
1837 struct nfs4_state_owner *sp = data->owner;
549b19cc 1838 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1839
24ac23ab 1840 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1841 goto out_wait;
aac00a8d
TM		 1842 /*
1843 * Check if we still need to send an OPEN call, or if we can use
1844 * a delegation instead.
1845 */
1846 if (data->state != NULL) {
1847 struct nfs_delegation *delegation;
1848
dc0b027d 1849 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1850 goto out_no_action;
aac00a8d
TM		 1851 rcu_read_lock();
1852 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1853 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1854 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1855 can_open_delegated(delegation, data->o_arg.fmode))
1856 goto unlock_no_action;
aac00a8d
TM		 1857 rcu_read_unlock();
1858 }
95b72eb0 1859 /* Update client id. */
549b19cc 1860 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1861 switch (data->o_arg.claim) {
1862 case NFS4_OPEN_CLAIM_PREVIOUS:
1863 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1864 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1865 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1866 case NFS4_OPEN_CLAIM_FH:
1867 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1868 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1869 }
26e976a8 1870 data->timestamp = jiffies;
035168ab 1871 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1872 &data->o_arg.seq_args,
2240a9e2
TM		 1873 &data->o_res.seq_res,
1874 task) != 0)
1875 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1876
1877 /* Set the create mode (note dependency on the session type) */
1878 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1879 if (data->o_arg.open_flags & O_EXCL) {
1880 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1881 if (nfs4_has_persistent_session(clp))
1882 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1883 else if (clp->cl_mvops->minor_version > 0)
1884 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1885 }
6ee41268 1886 return;
652f89f6
TM		 1887unlock_no_action:
1888 rcu_read_unlock();
6ee41268
TM		 1889out_no_action:
1890 task->tk_action = NULL;
c8da19b9 1891out_wait:
b75ad4cd 1892 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1893}
1894
24ac23ab
TM		 1895static void nfs4_open_done(struct rpc_task *task, void *calldata)
1896{
1897 struct nfs4_opendata *data = calldata;
1da177e4 1898
24ac23ab 1899 data->rpc_status = task->tk_status;
d898528c 1900
14516c3a
TM		 1901 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1902 return;
d898528c 1903
24ac23ab 1904 if (task->tk_status == 0) {
807d66d8
TM		 1905 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1906 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1907 case S_IFREG:
1908 break;
1909 case S_IFLNK:
24ac23ab 1910 data->rpc_status = -ELOOP;
6f926b5b
TM		 1911 break;
1912 case S_IFDIR:
24ac23ab 1913 data->rpc_status = -EISDIR;
6f926b5b
TM		 1914 break;
1915 default:
24ac23ab 1916 data->rpc_status = -ENOTDIR;
807d66d8 1917 }
6f926b5b 1918 }
26e976a8 1919 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1920 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1921 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1922 }
3e309914 1923 data->rpc_done = 1;
24ac23ab 1924}
6f926b5b 1925
24ac23ab
TM		 1926static void nfs4_open_release(void *calldata)
1927{
1928 struct nfs4_opendata *data = calldata;
1929 struct nfs4_state *state = NULL;
1930
1931 /* If this request hasn't been cancelled, do nothing */
1932 if (data->cancelled == 0)
1933 goto out_free;
1934 /* In case of error, no cleanup! */
3e309914 1935 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1936 goto out_free;
1937 /* In case we need an open_confirm, no cleanup! */
1938 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1939 goto out_free;
24ac23ab 1940 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1941 if (!IS_ERR(state))
643168c2 1942 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1943out_free:
c6d00e63 1944 nfs4_opendata_put(data);
24ac23ab
TM		 1945}
1946
1947static const struct rpc_call_ops nfs4_open_ops = {
1948 .rpc_call_prepare = nfs4_open_prepare,
1949 .rpc_call_done = nfs4_open_done,
1950 .rpc_release = nfs4_open_release,
1951};
1952
b257957e 1953static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1954{
1955 struct inode *dir = data->dir->d_inode;
1956 struct nfs_server *server = NFS_SERVER(dir);
1957 struct nfs_openargs *o_arg = &data->o_arg;
1958 struct nfs_openres *o_res = &data->o_res;
1959 struct rpc_task *task;
5138fde0
TM		 1960 struct rpc_message msg = {
1961 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1962 .rpc_argp = o_arg,
1963 .rpc_resp = o_res,
1964 .rpc_cred = data->owner->so_cred,
1965 };
c970aa85
TM		 1966 struct rpc_task_setup task_setup_data = {
1967 .rpc_client = server->client,
5138fde0 1968 .rpc_message = &msg,
c970aa85
TM		 1969 .callback_ops = &nfs4_open_ops,
1970 .callback_data = data,
101070ca 1971 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1972 .flags = RPC_TASK_ASYNC,
1973 };
24ac23ab
TM		 1974 int status;
1975
a9c92d6b 1976 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1977 kref_get(&data->kref);
3e309914
TM		 1978 data->rpc_done = 0;
1979 data->rpc_status = 0;
2ced46c2 1980 data->cancelled = 0;
bdeca1b7
TM		 1981 data->is_recover = 0;
1982 if (isrecover) {
8fe72bac 1983 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1984 data->is_recover = 1;
1985 }
c970aa85 1986 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1987 if (IS_ERR(task))
1988 return PTR_ERR(task);
1989 status = nfs4_wait_for_completion_rpc_task(task);
1990 if (status != 0) {
1991 data->cancelled = 1;
1992 smp_wmb();
1993 } else
1994 status = data->rpc_status;
1995 rpc_put_task(task);
1996
1997 return status;
1998}
1999
2000static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2001{
2002 struct inode *dir = data->dir->d_inode;
2003 struct nfs_openres *o_res = &data->o_res;
2004 int status;
2005
2006 status = nfs4_run_open_task(data, 1);
2007 if (status != 0 || !data->rpc_done)
2008 return status;
2009
6926afd1
TM		 2010 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2011
b257957e
AB		 2012 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2013 status = _nfs4_proc_open_confirm(data);
2014 if (status != 0)
2015 return status;
2016 }
2017
2018 return status;
2019}
2020
f3792d63
TM		 2021/*
2022 * Additional permission checks in order to distinguish between an
2023 * open for read, and an open for execute. This works around the
2024 * fact that NFSv4 OPEN treats read and execute permissions as being
2025 * the same.
2026 * Note that in the non-execute case, we want to turn off permission
2027 * checking if we just created a new file (POSIX open() semantics).
2028 */
6168f62c
WAA		 2029static int nfs4_opendata_access(struct rpc_cred *cred,
2030 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2031 struct nfs4_state *state, fmode_t fmode,
2032 int openflags)
6168f62c
WAA		 2033{
2034 struct nfs_access_entry cache;
2035 u32 mask;
2036
2037 /* access call failed or for some reason the server doesn't
2038 * support any access modes -- defer access call until later */
2039 if (opendata->o_res.access_supported == 0)
2040 return 0;
2041
2042 mask = 0;
f3792d63
TM		 2043 /*
2044 * Use openflags to check for exec, because fmode won't
2045 * always have FMODE_EXEC set when file open for exec.
2046 */
f8d9a897
WAA		 2047 if (openflags & __FMODE_EXEC) {
2048 /* ONLY check for exec rights */
2049 mask = MAY_EXEC;
f3792d63 2050 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2051 mask = MAY_READ;
6168f62c
WAA		 2052
2053 cache.cred = cred;
2054 cache.jiffies = jiffies;
2055 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2056 nfs_access_add_cache(state->inode, &cache);
2057
bbd3a8ee 2058 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2059 return 0;
2060
2061 /* even though OPEN succeeded, access is denied. Close the file */
2062 nfs4_close_state(state, fmode);
998f40b5 2063 return -EACCES;
6168f62c
WAA		 2064}
2065
b257957e
AB		 2066/*
2067 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2068 */
2069static int _nfs4_proc_open(struct nfs4_opendata *data)
2070{
2071 struct inode *dir = data->dir->d_inode;
2072 struct nfs_server *server = NFS_SERVER(dir);
2073 struct nfs_openargs *o_arg = &data->o_arg;
2074 struct nfs_openres *o_res = &data->o_res;
2075 int status;
2076
2077 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2078 if (!data->rpc_done)
2079 return status;
2080 if (status != 0) {
2081 if (status == -NFS4ERR_BADNAME &&
2082 !(o_arg->open_flags & O_CREAT))
2083 return -ENOENT;
24ac23ab 2084 return status;
08ef7bd3 2085 }
24ac23ab 2086
6926afd1
TM		 2087 nfs_fattr_map_and_free_names(server, &data->f_attr);
2088
5bc2afc2 2089 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2090 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2091 if (o_arg->open_flags & O_EXCL)
2092 data->file_created = 1;
2093 else if (o_res->cinfo.before != o_res->cinfo.after)
2094 data->file_created = 1;
2095 }
0df5dd4a
TM		 2096 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2097 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2098 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2099 status = _nfs4_proc_open_confirm(data);
1da177e4 2100 if (status != 0)
24ac23ab 2101 return status;
1da177e4
LT		 2102 }
2103 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2104 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2105 return 0;
1da177e4
LT		 2106}
2107
d83217c1
AA		 2108static int nfs4_recover_expired_lease(struct nfs_server *server)
2109{
2110 return nfs4_client_recover_expired_lease(server->nfs_client);
2111}
2112
1da177e4
LT		 2113/*
2114 * OPEN_EXPIRED:
2115 * reclaim state on the server after a network partition.
2116 * Assumes caller holds the appropriate lock
2117 */
539cd03a 2118static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2119{
e56e0b78 2120 struct nfs4_opendata *opendata;
864472e9 2121 int ret;
1da177e4 2122
4a1c0893 2123 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2124 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2125 if (IS_ERR(opendata))
2126 return PTR_ERR(opendata);
864472e9 2127 ret = nfs4_open_recover(opendata, state);
35d05778 2128 if (ret == -ESTALE)
3d4ff43d 2129 d_drop(ctx->dentry);
c6d00e63 2130 nfs4_opendata_put(opendata);
864472e9 2131 return ret;
1da177e4
LT		 2132}
2133
a9ed2e25 2134static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2135{
539cd03a 2136 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2137 struct nfs4_exception exception = { };
2138 int err;
2139
2140 do {
539cd03a 2141 err = _nfs4_open_expired(ctx, state);
42113a75 2142 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2143 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2144 continue;
a9ed2e25
TM		 2145 switch (err) {
2146 default:
2147 goto out;
2148 case -NFS4ERR_GRACE:
2149 case -NFS4ERR_DELAY:
2150 nfs4_handle_exception(server, err, &exception);
2151 err = 0;
2152 }
202b50dc 2153 } while (exception.retry);
a9ed2e25 2154out:
202b50dc
TM		 2155 return err;
2156}
2157
1da177e4
LT		 2158static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2159{
1da177e4 2160 struct nfs_open_context *ctx;
864472e9 2161 int ret;
1da177e4 2162
864472e9
TM		 2163 ctx = nfs4_state_find_open_context(state);
2164 if (IS_ERR(ctx))
91876b13 2165 return -EAGAIN;
539cd03a 2166 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2167 put_nfs_open_context(ctx);
2168 return ret;
1da177e4
LT		 2169}
2170
4dfd4f7a
TM		 2171static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2172{
2173 nfs_remove_bad_delegation(state->inode);
2174 write_seqlock(&state->seqlock);
2175 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2176 write_sequnlock(&state->seqlock);
2177 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2178}
2179
2180static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2181{
2182 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2183 nfs_finish_clear_delegation_stateid(state);
2184}
2185
2186static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2187{
2188 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2189 nfs40_clear_delegation_stateid(state);
2190 return nfs4_open_expired(sp, state);
2191}
2192
f062eb6c 2193#if defined(CONFIG_NFS_V4_1)
0c116cad 2194static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2195{
f062eb6c 2196 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2197 nfs4_stateid stateid;
ab7cb0df 2198 struct nfs_delegation *delegation;
0c116cad
TM		 2199 struct rpc_cred *cred;
2200 int status;
3e60ffdd 2201
ab7cb0df
TM		 2202 /* Get the delegation credential for use by test/free_stateid */
2203 rcu_read_lock();
2204 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2205 if (delegation == NULL) {
ab7cb0df 2206 rcu_read_unlock();
0c116cad
TM		 2207 return;
2208 }
2209
2210 nfs4_stateid_copy(&stateid, &delegation->stateid);
2211 cred = get_rpccred(delegation->cred);
2212 rcu_read_unlock();
2213 status = nfs41_test_stateid(server, &stateid, cred);
2214 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2215
3e60ffdd
CL		 2216 if (status != NFS_OK) {
2217 /* Free the stateid unless the server explicitly
2218 * informs us the stateid is unrecognized. */
2219 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2220 nfs41_free_stateid(server, &stateid, cred);
2221 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2222 }
ab7cb0df 2223
0c116cad 2224 put_rpccred(cred);
3e60ffdd
CL		 2225}
2226
2227/**
2228 * nfs41_check_open_stateid - possibly free an open stateid
2229 *
2230 * @state: NFSv4 state for an inode
2231 *
2232 * Returns NFS_OK if recovery for this stateid is now finished.
2233 * Otherwise a negative NFS4ERR value is returned.
2234 */
2235static int nfs41_check_open_stateid(struct nfs4_state *state)
2236{
2237 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2238 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2239 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2240 int status;
2241
2242 /* If a state reset has been done, test_stateid is unneeded */
2243 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2244 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2245 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2246 return -NFS4ERR_BAD_STATEID;
2247
ab7cb0df 2248 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2249 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2250 if (status != NFS_OK) {
2251 /* Free the stateid unless the server explicitly
2252 * informs us the stateid is unrecognized. */
2253 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2254 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2255
2256 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2257 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2258 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2259 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2260 }
2261 return status;
2262}
2263
2264static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2265{
eb64cf96 2266 int status;
b01dd1d8 2267
0c116cad 2268 nfs41_check_delegation_stateid(state);
3e60ffdd 2269 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2270 if (status != NFS_OK)
2271 status = nfs4_open_expired(sp, state);
2272 return status;
f062eb6c
BS		 2273}
2274#endif
2275
aa53ed54
JL		 2276/*
2277 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2278 * fields corresponding to attributes that were used to store the verifier.
2279 * Make sure we clobber those fields in the later setattr call
2280 */
2281static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2282{
2283 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2284 !(sattr->ia_valid & ATTR_ATIME_SET))
2285 sattr->ia_valid |= ATTR_ATIME;
2286
2287 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2288 !(sattr->ia_valid & ATTR_MTIME_SET))
2289 sattr->ia_valid |= ATTR_MTIME;
2290}
2291
c21443c2
TM		 2292static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2293 fmode_t fmode,
2294 int flags,
3efb9722 2295 struct nfs_open_context *ctx)
c21443c2
TM		 2296{
2297 struct nfs4_state_owner *sp = opendata->owner;
2298 struct nfs_server *server = sp->so_server;
275bb307 2299 struct dentry *dentry;
c21443c2
TM		 2300 struct nfs4_state *state;
2301 unsigned int seq;
2302 int ret;
2303
2304 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2305
2306 ret = _nfs4_proc_open(opendata);
dca78001 2307 if (ret != 0)
c21443c2
TM		 2308 goto out;
2309
2310 state = nfs4_opendata_to_nfs4_state(opendata);
2311 ret = PTR_ERR(state);
2312 if (IS_ERR(state))
2313 goto out;
2314 if (server->caps & NFS_CAP_POSIX_LOCK)
2315 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2316
275bb307
TM		 2317 dentry = opendata->dentry;
2318 if (dentry->d_inode == NULL) {
2319 /* FIXME: Is this d_drop() ever needed? */
2320 d_drop(dentry);
2321 dentry = d_add_unique(dentry, igrab(state->inode));
2322 if (dentry == NULL) {
2323 dentry = opendata->dentry;
2324 } else if (dentry != ctx->dentry) {
2325 dput(ctx->dentry);
2326 ctx->dentry = dget(dentry);
2327 }
2328 nfs_set_verifier(dentry,
2329 nfs_save_change_attribute(opendata->dir->d_inode));
2330 }
2331
c21443c2
TM		 2332 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2333 if (ret != 0)
2334 goto out;
2335
3efb9722 2336 ctx->state = state;
c45ffdd2
TM		 2337 if (dentry->d_inode == state->inode) {
2338 nfs_inode_attach_open_context(ctx);
2339 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2340 nfs4_schedule_stateid_recovery(server, state);
2341 }
c21443c2
TM		 2342out:
2343 return ret;
2344}
2345
1da177e4 2346/*
24ac23ab 2347 * Returns a referenced nfs4_state
1da177e4 2348 */
82be417a 2349static int _nfs4_do_open(struct inode *dir,
4197a055 2350 struct nfs_open_context *ctx,
82be417a
AA		 2351 int flags,
2352 struct iattr *sattr,
5bc2afc2
TM		 2353 struct nfs4_label *label,
2354 int *opened)
1da177e4
LT		 2355{
2356 struct nfs4_state_owner *sp;
2357 struct nfs4_state *state = NULL;
2358 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2359 struct nfs4_opendata *opendata;
4197a055
TM		 2360 struct dentry *dentry = ctx->dentry;
2361 struct rpc_cred *cred = ctx->cred;
2362 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2363 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2364 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2365 struct nfs4_label *olabel = NULL;
aac00a8d 2366 int status;
1da177e4
LT		 2367
2368 /* Protect against reboot recovery conflicts */
1da177e4 2369 status = -ENOMEM;
d1e284d5
TM		 2370 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2371 if (sp == NULL) {
1da177e4
LT		 2372 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2373 goto out_err;
2374 }
58d9714a
TM		 2375 status = nfs4_recover_expired_lease(server);
2376 if (status != 0)
b4454fe1 2377 goto err_put_state_owner;
82a2c1b7
AV		 2378 if (dentry->d_inode != NULL)
2379 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2380 status = -ENOMEM;
49f9a0fa
TM		 2381 if (dentry->d_inode)
2382 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2383 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2384 label, claim, GFP_KERNEL);
e56e0b78 2385 if (opendata == NULL)
95d35cb4 2386 goto err_put_state_owner;
1da177e4 2387
14c43f76
DQ		 2388 if (label) {
2389 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2390 if (IS_ERR(olabel)) {
2391 status = PTR_ERR(olabel);
2392 goto err_opendata_put;
2393 }
2394 }
2395
e911b815
TM		 2396 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2397 if (!opendata->f_attr.mdsthreshold) {
2398 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2399 if (!opendata->f_attr.mdsthreshold)
2400 goto err_free_label;
2401 }
1549210f 2402 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2403 }
82a2c1b7
AV		 2404 if (dentry->d_inode != NULL)
2405 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2406
3efb9722 2407 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2408 if (status != 0)
14c43f76 2409 goto err_free_label;
3efb9722 2410 state = ctx->state;
6168f62c 2411
549b19cc
TM		 2412 if ((opendata->o_arg.open_flags & O_EXCL) &&
2413 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2414 nfs4_exclusive_attrset(opendata, sattr);
2415
2416 nfs_fattr_init(opendata->o_res.f_attr);
2417 status = nfs4_do_setattr(state->inode, cred,
2418 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2419 state, label, olabel);
2420 if (status == 0) {
f044636d
TM		 2421 nfs_setattr_update_inode(state->inode, sattr,
2422 opendata->o_res.f_attr);
aa9c2669 2423 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2424 }
0ab64e0e 2425 }
5bc2afc2
TM		 2426 if (opendata->file_created)
2427 *opened |= FILE_CREATED;
82be417a 2428
e911b815 2429 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2430 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2431 opendata->f_attr.mdsthreshold = NULL;
2432 }
82be417a 2433
14c43f76
DQ		 2434 nfs4_label_free(olabel);
2435
c6d00e63 2436 nfs4_opendata_put(opendata);
1da177e4 2437 nfs4_put_state_owner(sp);
1da177e4 2438 return 0;
14c43f76
DQ		 2439err_free_label:
2440 nfs4_label_free(olabel);
c6d00e63
TM		 2441err_opendata_put:
2442 nfs4_opendata_put(opendata);
e56e0b78
TM		 2443err_put_state_owner:
2444 nfs4_put_state_owner(sp);
1da177e4 2445out_err:
1da177e4
LT		 2446 return status;
2447}
2448
2449
82be417a 2450static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2451 struct nfs_open_context *ctx,
82be417a
AA		 2452 int flags,
2453 struct iattr *sattr,
5bc2afc2
TM		 2454 struct nfs4_label *label,
2455 int *opened)
1da177e4 2456{
49f9a0fa 2457 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2458 struct nfs4_exception exception = { };
2459 struct nfs4_state *res;
2460 int status;
2461
2462 do {
5bc2afc2 2463 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2464 res = ctx->state;
42113a75 2465 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2466 if (status == 0)
2467 break;
2468 /* NOTE: BAD_SEQID means the server and client disagree about the
2469 * book-keeping w.r.t. state-changing operations
2470 * (OPEN/CLOSE/LOCK/LOCKU...)
2471 * It is actually a sign of a bug on the client or on the server.
2472 *
2473 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2474 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2475 * have unhashed the old state_owner for us, and that we can
2476 * therefore safely retry using a new one. We should still warn
2477 * the user though...
2478 */
2479 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2480 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2481 " returned a bad sequence-id error!\n",
2482 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2483 exception.retry = 1;
2484 continue;
2485 }
550f5747
TM		 2486 /*
2487 * BAD_STATEID on OPEN means that the server cancelled our
2488 * state before it received the OPEN_CONFIRM.
2489 * Recover by retrying the request as per the discussion
2490 * on Page 181 of RFC3530.
2491 */
2492 if (status == -NFS4ERR_BAD_STATEID) {
2493 exception.retry = 1;
2494 continue;
2495 }
aac00a8d
TM		 2496 if (status == -EAGAIN) {
2497 /* We must have found a delegation */
2498 exception.retry = 1;
2499 continue;
2500 }
49f9a0fa
TM		 2501 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2502 continue;
2503 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2504 status, &exception));
2505 } while (exception.retry);
2506 return res;
2507}
2508
659bfcd6
TM		 2509static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2510 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2511 struct nfs4_state *state, struct nfs4_label *ilabel,
2512 struct nfs4_label *olabel)
1da177e4 2513{
3e4f6290 2514 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2515 struct nfs_setattrargs arg = {
3e4f6290 2516 .fh = NFS_FH(inode),
1da177e4
LT		 2517 .iap = sattr,
2518 .server = server,
2519 .bitmask = server->attr_bitmask,
1775fd3e 2520 .label = ilabel,
1da177e4
LT		 2521 };
2522 struct nfs_setattrres res = {
2523 .fattr = fattr,
1775fd3e 2524 .label = olabel,
1da177e4
LT		 2525 .server = server,
2526 };
2527 struct rpc_message msg = {
659bfcd6
TM		 2528 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2529 .rpc_argp = &arg,
2530 .rpc_resp = &res,
2531 .rpc_cred = cred,
1da177e4 2532 };
26e976a8 2533 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2534 fmode_t fmode;
2535 bool truncate;
65e4308d 2536 int status;
1da177e4 2537
aa9c2669
DQ		 2538 arg.bitmask = nfs4_bitmask(server, ilabel);
2539 if (ilabel)
2540 arg.bitmask = nfs4_bitmask(server, olabel);
2541
0e574af1 2542 nfs_fattr_init(fattr);
1da177e4 2543
ee3ae84e
TM		 2544 /* Servers should only apply open mode checks for file size changes */
2545 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2546 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2547
2548 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2549 /* Use that stateid */
0418dae1 2550 } else if (truncate && state != NULL) {
2a369153
TM		 2551 struct nfs_lockowner lockowner = {
2552 .l_owner = current->files,
2553 .l_pid = current->tgid,
2554 };
0418dae1
TM		 2555 if (!nfs4_valid_open_stateid(state))
2556 return -EBADF;
2557 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2558 &lockowner) == -EIO)
2559 return -EBADF;
08e9eac4 2560 } else
f597c537 2561 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2562
7c513058 2563 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2564 if (status == 0 && state != NULL)
2565 renew_lease(server, timestamp);
65e4308d 2566 return status;
1da177e4
LT		 2567}
2568
659bfcd6
TM		 2569static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2570 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2571 struct nfs4_state *state, struct nfs4_label *ilabel,
2572 struct nfs4_label *olabel)
1da177e4 2573{
3e4f6290 2574 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2575 struct nfs4_exception exception = {
2576 .state = state,
3114ea7a 2577 .inode = inode,
a1d0b5ee 2578 };
1da177e4
LT		 2579 int err;
2580 do {
1775fd3e 2581 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2582 trace_nfs4_setattr(inode, err);
451146be
TM		 2583 switch (err) {
2584 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2585 if (!(sattr->ia_valid & ATTR_SIZE)) {
2586 pr_warn_once("NFSv4: server %s is incorrectly "
2587 "applying open mode checks to "
2588 "a SETATTR that is not "
2589 "changing file size.\n",
2590 server->nfs_client->cl_hostname);
2591 }
451146be
TM		 2592 if (state && !(state->state & FMODE_WRITE)) {
2593 err = -EBADF;
2594 if (sattr->ia_valid & ATTR_OPEN)
2595 err = -EACCES;
2596 goto out;
2597 }
2598 }
2599 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2600 } while (exception.retry);
451146be 2601out:
1da177e4
LT		 2602 return err;
2603}
2604
2605struct nfs4_closedata {
2606 struct inode *inode;
2607 struct nfs4_state *state;
2608 struct nfs_closeargs arg;
2609 struct nfs_closeres res;
516a6af6 2610 struct nfs_fattr fattr;
26e976a8 2611 unsigned long timestamp;
f7e8917a
FI		 2612 bool roc;
2613 u32 roc_barrier;
1da177e4
LT		 2614};
2615
963d8fe5 2616static void nfs4_free_closedata(void *data)
9512135d 2617{
963d8fe5
TM		 2618 struct nfs4_closedata *calldata = data;
2619 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2620 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2621
f7e8917a
FI		 2622 if (calldata->roc)
2623 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2624 nfs4_put_open_state(calldata->state);
2625 nfs_free_seqid(calldata->arg.seqid);
9512135d 2626 nfs4_put_state_owner(sp);
322b2b90 2627 nfs_sb_deactive(sb);
9512135d
TM		 2628 kfree(calldata);
2629}
2630
963d8fe5 2631static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2632{
963d8fe5 2633 struct nfs4_closedata *calldata = data;
1da177e4 2634 struct nfs4_state *state = calldata->state;
1da177e4 2635 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2636 nfs4_stateid *res_stateid = NULL;
1da177e4 2637
a3ca5651 2638 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2639 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2640 return;
42113a75 2641 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2642 /* hmm. we are done with the inode, and in the process of freeing
2643 * the state_owner. we keep this around to process errors
2644 */
1da177e4
LT		 2645 switch (task->tk_status) {
2646 case 0:
412f6c4c
TM		 2647 res_stateid = &calldata->res.stateid;
2648 if (calldata->arg.fmode == 0 && calldata->roc)
f7e8917a
FI		 2649 pnfs_roc_set_barrier(state->inode,
2650 calldata->roc_barrier);
26e976a8 2651 renew_lease(server, calldata->timestamp);
412f6c4c 2652 break;
69794ad7 2653 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2654 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2655 case -NFS4ERR_OLD_STATEID:
2656 case -NFS4ERR_BAD_STATEID:
1da177e4 2657 case -NFS4ERR_EXPIRED:
566fcec6 2658 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 2659 &state->open_stateid)) {
566fcec6
TM		 2660 rpc_restart_call_prepare(task);
2661 goto out_release;
2662 }
dc0b027d 2663 if (calldata->arg.fmode == 0)
9e33bed5 2664 break;
1da177e4 2665 default:
8478eaa1 2666 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2667 rpc_restart_call_prepare(task);
69794ad7
TM		 2668 goto out_release;
2669 }
1da177e4 2670 }
412f6c4c 2671 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
69794ad7 2672out_release:
72211dbe 2673 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2674 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2675 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2676}
2677
4ce70ada 2678static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2679{
4ce70ada 2680 struct nfs4_closedata *calldata = data;
9512135d 2681 struct nfs4_state *state = calldata->state;
7fdab069 2682 struct inode *inode = calldata->inode;
aee7af35 2683 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2684 int call_close = 0;
9512135d 2685
a3ca5651 2686 dprintk("%s: begin!\n", __func__);
963d8fe5 2687 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2688 goto out_wait;
003707c7 2689
88069f77 2690 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2691 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2692 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2693 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2694 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 2695 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 2696 /* Calculate the change in open mode */
cd9288ff 2697 calldata->arg.fmode = 0;
e7616923 2698 if (state->n_rdwr == 0) {
cd9288ff
TM		 2699 if (state->n_rdonly == 0)
2700 call_close |= is_rdonly;
2701 else if (is_rdonly)
2702 calldata->arg.fmode |= FMODE_READ;
2703 if (state->n_wronly == 0)
2704 call_close |= is_wronly;
2705 else if (is_wronly)
2706 calldata->arg.fmode |= FMODE_WRITE;
2707 } else if (is_rdwr)
2708 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2709
2710 if (calldata->arg.fmode == 0)
2711 call_close |= is_rdwr;
2712
5d422301
TM		 2713 if (!nfs4_valid_open_stateid(state))
2714 call_close = 0;
4cecb76f 2715 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2716
2717 if (!call_close) {
963d8fe5 2718 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2719 goto out_no_action;
9512135d 2720 }
88069f77 2721
f7e8917a 2722 if (calldata->arg.fmode == 0) {
88069f77 2723 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2724 if (calldata->roc &&
b9536ad5
AA		 2725 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2726 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2727 goto out_wait;
b9536ad5 2728 }
f7e8917a 2729 }
6ae37339
TM		 2730 calldata->arg.share_access =
2731 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2732 calldata->arg.fmode, 0);
88069f77 2733
516a6af6 2734 nfs_fattr_init(calldata->res.fattr);
26e976a8 2735 calldata->timestamp = jiffies;
7fdab069 2736 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2737 &calldata->arg.seq_args,
2738 &calldata->res.seq_res,
2240a9e2
TM		 2739 task) != 0)
2740 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2741 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2742 return;
2743out_no_action:
2744 task->tk_action = NULL;
2745out_wait:
2746 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2747}
2748
963d8fe5 2749static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2750 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2751 .rpc_call_done = nfs4_close_done,
2752 .rpc_release = nfs4_free_closedata,
2753};
2754
fe08c546
PT		 2755static bool nfs4_roc(struct inode *inode)
2756{
40dd4b7a 2757 if (!nfs_have_layout(inode))
fe08c546 2758 return false;
fe08c546
PT		 2759 return pnfs_roc(inode);
2760}
2761
1da177e4
LT		 2762/*
2763 * It is possible for data to be read/written from a mem-mapped file
2764 * after the sys_close call (which hits the vfs layer as a flush).
2765 * This means that we can't safely call nfsv4 close on a file until
2766 * the inode is cleared. This in turn means that we are not good
2767 * NFSv4 citizens - we do not indicate to the server to update the file's
2768 * share state even when we are done with one of the three share
2769 * stateid's in the inode.
2770 *
2771 * NOTE: Caller must be holding the sp->so_owner semaphore!
2772 */
1f7977c1 2773int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2774{
4a35bd41 2775 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 2776 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 2777 struct nfs4_closedata *calldata;
b39e625b
TM		 2778 struct nfs4_state_owner *sp = state->owner;
2779 struct rpc_task *task;
5138fde0
TM		 2780 struct rpc_message msg = {
2781 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2782 .rpc_cred = state->owner->so_cred,
2783 };
c970aa85
TM		 2784 struct rpc_task_setup task_setup_data = {
2785 .rpc_client = server->client,
5138fde0 2786 .rpc_message = &msg,
c970aa85 2787 .callback_ops = &nfs4_close_ops,
101070ca 2788 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2789 .flags = RPC_TASK_ASYNC,
2790 };
9512135d 2791 int status = -ENOMEM;
1da177e4 2792
fa940720
WAA		 2793 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2794 &task_setup_data.rpc_client, &msg);
2795
8535b2be 2796 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2797 if (calldata == NULL)
9512135d 2798 goto out;
a9c92d6b 2799 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2800 calldata->inode = state->inode;
1da177e4 2801 calldata->state = state;
4a35bd41 2802 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 2803 /* Serialization for the sequence id */
63f5f796
TM		 2804 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2805 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 2806 if (IS_ERR(calldata->arg.seqid))
9512135d 2807 goto out_free_calldata;
dc0b027d 2808 calldata->arg.fmode = 0;
a65318bf 2809 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2810 calldata->res.fattr = &calldata->fattr;
c1d51931 2811 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2812 calldata->res.server = server;
fe08c546 2813 calldata->roc = nfs4_roc(state->inode);
643168c2 2814 nfs_sb_active(calldata->inode->i_sb);
9512135d 2815
1174dd1f
TM		 2816 msg.rpc_argp = &calldata->arg;
2817 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2818 task_setup_data.callback_data = calldata;
2819 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2820 if (IS_ERR(task))
2821 return PTR_ERR(task);
a49c3c77
TM		 2822 status = 0;
2823 if (wait)
2824 status = rpc_wait_for_completion_task(task);
b39e625b 2825 rpc_put_task(task);
a49c3c77 2826 return status;
9512135d
TM		 2827out_free_calldata:
2828 kfree(calldata);
2829out:
b39e625b
TM		 2830 nfs4_put_open_state(state);
2831 nfs4_put_state_owner(sp);
9512135d 2832 return status;
1da177e4
LT		 2833}
2834
2b484297 2835static struct inode *
5bc2afc2
TM		 2836nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2837 int open_flags, struct iattr *attr, int *opened)
1da177e4 2838{
1da177e4 2839 struct nfs4_state *state;
aa9c2669
DQ		 2840 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2841
2842 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2843
565277f6 2844 /* Protect against concurrent sillydeletes */
5bc2afc2 2845 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2846
2847 nfs4_label_release_security(label);
2848
f46e0bd3
TM		 2849 if (IS_ERR(state))
2850 return ERR_CAST(state);
275bb307 2851 return state->inode;
1da177e4
LT		 2852}
2853
1185a552 2854static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2855{
2856 if (ctx->state == NULL)
2857 return;
2858 if (is_sync)
643168c2 2859 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2860 else
643168c2 2861 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2862}
1da177e4 2863
b944dba3
TM		 2864#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2865#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2866#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2867
1da177e4
LT		 2868static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2869{
43652ad5
BH		 2870 struct nfs4_server_caps_arg args = {
2871 .fhandle = fhandle,
2872 };
1da177e4
LT		 2873 struct nfs4_server_caps_res res = {};
2874 struct rpc_message msg = {
2875 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2876 .rpc_argp = &args,
1da177e4
LT		 2877 .rpc_resp = &res,
2878 };
2879 int status;
2880
7c513058 2881 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2882 if (status == 0) {
b944dba3
TM		 2883 /* Sanity check the server answers */
2884 switch (server->nfs_client->cl_minorversion) {
2885 case 0:
2886 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2887 res.attr_bitmask[2] = 0;
2888 break;
2889 case 1:
2890 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2891 break;
2892 case 2:
2893 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2894 }
1da177e4 2895 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2896 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2897 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2898 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2899 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2900 NFS_CAP_CTIME|NFS_CAP_MTIME|
2901 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2902 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2903 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2904 server->caps |= NFS_CAP_ACLS;
2905 if (res.has_links != 0)
2906 server->caps |= NFS_CAP_HARDLINKS;
2907 if (res.has_symlinks != 0)
2908 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2909 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2910 server->caps |= NFS_CAP_FILEID;
2911 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2912 server->caps |= NFS_CAP_MODE;
2913 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2914 server->caps |= NFS_CAP_NLINK;
2915 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2916 server->caps |= NFS_CAP_OWNER;
2917 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2918 server->caps |= NFS_CAP_OWNER_GROUP;
2919 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2920 server->caps |= NFS_CAP_ATIME;
2921 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2922 server->caps |= NFS_CAP_CTIME;
2923 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2924 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2925#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2926 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2927 server->caps |= NFS_CAP_SECURITY_LABEL;
2928#endif
2929 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2930 sizeof(server->attr_bitmask));
b944dba3 2931 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2932
a65318bf
TM		 2933 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2934 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2935 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2936 server->cache_consistency_bitmask[2] = 0;
1da177e4 2937 server->acl_bitmask = res.acl_bitmask;
264e6351 2938 server->fh_expire_type = res.fh_expire_type;
1da177e4 2939 }
cccef3b9 2940
1da177e4
LT		 2941 return status;
2942}
2943
55a97593 2944int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2945{
2946 struct nfs4_exception exception = { };
2947 int err;
2948 do {
2949 err = nfs4_handle_exception(server,
2950 _nfs4_server_capabilities(server, fhandle),
2951 &exception);
2952 } while (exception.retry);
2953 return err;
2954}
2955
2956static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2957 struct nfs_fsinfo *info)
2958{
aa9c2669 2959 u32 bitmask[3];
1da177e4 2960 struct nfs4_lookup_root_arg args = {
aa9c2669 2961 .bitmask = bitmask,
1da177e4
LT		 2962 };
2963 struct nfs4_lookup_res res = {
2964 .server = server,
0e574af1 2965 .fattr = info->fattr,
1da177e4
LT		 2966 .fh = fhandle,
2967 };
2968 struct rpc_message msg = {
2969 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2970 .rpc_argp = &args,
2971 .rpc_resp = &res,
2972 };
008f55d0 2973
aa9c2669
DQ		 2974 bitmask[0] = nfs4_fattr_bitmap[0];
2975 bitmask[1] = nfs4_fattr_bitmap[1];
2976 /*
2977 * Process the label in the upcoming getfattr
2978 */
2979 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2980
0e574af1 2981 nfs_fattr_init(info->fattr);
7c513058 2982 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2983}
2984
2985static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2986 struct nfs_fsinfo *info)
2987{
2988 struct nfs4_exception exception = { };
2989 int err;
2990 do {
fb8a5ba8 2991 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2992 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2993 switch (err) {
2994 case 0:
2995 case -NFS4ERR_WRONGSEC:
05e9cfb4 2996 goto out;
fb8a5ba8
BS		 2997 default:
2998 err = nfs4_handle_exception(server, err, &exception);
2999 }
1da177e4 3000 } while (exception.retry);
05e9cfb4 3001out:
1da177e4
LT		 3002 return err;
3003}
3004
8f70e95f
BS		 3005static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3006 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3007{
c2190661
TM		 3008 struct rpc_auth_create_args auth_args = {
3009 .pseudoflavor = flavor,
3010 };
8f70e95f
BS		 3011 struct rpc_auth *auth;
3012 int ret;
3013
c2190661 3014 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3015 if (IS_ERR(auth)) {
75bc8821 3016 ret = -EACCES;
8f70e95f
BS		 3017 goto out;
3018 }
3019 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3020out:
3021 return ret;
3022}
3023
9a744ba3
CL		 3024/*
3025 * Retry pseudoroot lookup with various security flavors. We do this when:
3026 *
3027 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3028 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3029 *
3030 * Returns zero on success, or a negative NFS4ERR value, or a
3031 * negative errno value.
3032 */
801a16dc 3033static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3034 struct nfs_fsinfo *info)
1da177e4 3035{
9a744ba3
CL		 3036 /* Per 3530bis 15.33.5 */
3037 static const rpc_authflavor_t flav_array[] = {
3038 RPC_AUTH_GSS_KRB5P,
3039 RPC_AUTH_GSS_KRB5I,
3040 RPC_AUTH_GSS_KRB5,
c4eafe11 3041 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3042 RPC_AUTH_NULL,
3043 };
3044 int status = -EPERM;
3045 size_t i;
6a1a1e34 3046
4d4b69dd
WAA		 3047 if (server->auth_info.flavor_len > 0) {
3048 /* try each flavor specified by user */
3049 for (i = 0; i < server->auth_info.flavor_len; i++) {
3050 status = nfs4_lookup_root_sec(server, fhandle, info,
3051 server->auth_info.flavors[i]);
3052 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3053 continue;
3054 break;
3055 }
3056 } else {
3057 /* no flavors specified by user, try default list */
3058 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3059 status = nfs4_lookup_root_sec(server, fhandle, info,
3060 flav_array[i]);
3061 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3062 continue;
3063 break;
3064 }
8f70e95f 3065 }
9a744ba3 3066
fb8a5ba8
BS		 3067 /*
3068 * -EACCESS could mean that the user doesn't have correct permissions
3069 * to access the mount. It could also mean that we tried to mount
3070 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3071 * existing mount programs don't handle -EACCES very well so it should
3072 * be mapped to -EPERM instead.
3073 */
3074 if (status == -EACCES)
3075 status = -EPERM;
801a16dc
BS		 3076 return status;
3077}
3078
2ed4b95b
CL		 3079static int nfs4_do_find_root_sec(struct nfs_server *server,
3080 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3081{
3082 int mv = server->nfs_client->cl_minorversion;
3083 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3084}
3085
3086/**
3087 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3088 * @server: initialized nfs_server handle
3089 * @fhandle: we fill in the pseudo-fs root file handle
3090 * @info: we fill in an FSINFO struct
5e6b1990 3091 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3092 *
3093 * Returns zero on success, or a negative errno.
801a16dc 3094 */
3028eb2b 3095int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3096 struct nfs_fsinfo *info,
3097 bool auth_probe)
801a16dc 3098{
2ed4b95b
CL		 3099 int status;
3100
5e6b1990
TM		 3101 switch (auth_probe) {
3102 case false:
3103 status = nfs4_lookup_root(server, fhandle, info);
3104 if (status != -NFS4ERR_WRONGSEC)
3105 break;
5e6b1990 3106 default:
2ed4b95b 3107 status = nfs4_do_find_root_sec(server, fhandle, info);
5e6b1990 3108 }
2ed4b95b 3109
1da177e4
LT		 3110 if (status == 0)
3111 status = nfs4_server_capabilities(server, fhandle);
3112 if (status == 0)
3113 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3114
c12e87f4 3115 return nfs4_map_errors(status);
1da177e4
LT		 3116}
3117
bae36241
BS		 3118static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3119 struct nfs_fsinfo *info)
3120{
3121 int error;
3122 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3123 struct nfs4_label *label = NULL;
bae36241
BS		 3124
3125 error = nfs4_server_capabilities(server, mntfh);
3126 if (error < 0) {
3127 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3128 return error;
3129 }
3130
14c43f76
DQ		 3131 label = nfs4_label_alloc(server, GFP_KERNEL);
3132 if (IS_ERR(label))
3133 return PTR_ERR(label);
3134
1775fd3e 3135 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3136 if (error < 0) {
3137 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3138 goto err_free_label;
bae36241
BS		 3139 }
3140
3141 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3142 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3143 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3144
14c43f76
DQ		 3145err_free_label:
3146 nfs4_label_free(label);
3147
bae36241
BS		 3148 return error;
3149}
3150
6b97fd3d
MN		 3151/*
3152 * Get locations and (maybe) other attributes of a referral.
3153 * Note that we'll actually follow the referral later when
3154 * we detect fsid mismatch in inode revalidation
3155 */
f05d147f
BS		 3156static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3157 const struct qstr *name, struct nfs_fattr *fattr,
3158 struct nfs_fh *fhandle)
6b97fd3d
MN		 3159{
3160 int status = -ENOMEM;
3161 struct page *page = NULL;
3162 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3163
3164 page = alloc_page(GFP_KERNEL);
3165 if (page == NULL)
3166 goto out;
3167 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3168 if (locations == NULL)
3169 goto out;
3170
f05d147f 3171 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3172 if (status != 0)
3173 goto out;
519ae255
CL		 3174
3175 /*
3176 * If the fsid didn't change, this is a migration event, not a
3177 * referral. Cause us to drop into the exception handler, which
3178 * will kick off migration recovery.
3179 */
6b97fd3d 3180 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3181 dprintk("%s: server did not return a different fsid for"
3182 " a referral at %s\n", __func__, name->name);
519ae255 3183 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3184 goto out;
3185 }
533eb461
AA		 3186 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3187 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3188
533eb461 3189 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3190 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3191 memset(fhandle, 0, sizeof(struct nfs_fh));
3192out:
3193 if (page)
3194 __free_page(page);
5d7ca35a 3195 kfree(locations);
6b97fd3d
MN		 3196 return status;
3197}
3198
1775fd3e
DQ		 3199static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3200 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3201{
3202 struct nfs4_getattr_arg args = {
3203 .fh = fhandle,
3204 .bitmask = server->attr_bitmask,
3205 };
3206 struct nfs4_getattr_res res = {
3207 .fattr = fattr,
1775fd3e 3208 .label = label,
1da177e4
LT		 3209 .server = server,
3210 };
3211 struct rpc_message msg = {
3212 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3213 .rpc_argp = &args,
3214 .rpc_resp = &res,
3215 };
aa9c2669
DQ		 3216
3217 args.bitmask = nfs4_bitmask(server, label);
3218
0e574af1 3219 nfs_fattr_init(fattr);
7c513058 3220 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3221}
3222
1775fd3e
DQ		 3223static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3224 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3225{
3226 struct nfs4_exception exception = { };
3227 int err;
3228 do {
b5f875a9
TM		 3229 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3230 trace_nfs4_getattr(server, fhandle, fattr, err);
3231 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3232 &exception);
3233 } while (exception.retry);
3234 return err;
3235}
3236
3237/*
3238 * The file is not closed if it is opened due to the a request to change
3239 * the size of the file. The open call will not be needed once the
3240 * VFS layer lookup-intents are implemented.
3241 *
3242 * Close is called when the inode is destroyed.
3243 * If we haven't opened the file for O_WRONLY, we
3244 * need to in the size_change case to obtain a stateid.
3245 *
3246 * Got race?
3247 * Because OPEN is always done by name in nfsv4, it is
3248 * possible that we opened a different file by the same
3249 * name. We can recognize this race condition, but we
3250 * can't do anything about it besides returning an error.
3251 *
3252 * This will be fixed with VFS changes (lookup-intent).
3253 */
3254static int
3255nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3256 struct iattr *sattr)
3257{
08e9eac4 3258 struct inode *inode = dentry->d_inode;
659bfcd6 3259 struct rpc_cred *cred = NULL;
d530838b 3260 struct nfs4_state *state = NULL;
14c43f76 3261 struct nfs4_label *label = NULL;
1da177e4
LT		 3262 int status;
3263
88ac815c
PT		 3264 if (pnfs_ld_layoutret_on_setattr(inode) &&
3265 sattr->ia_valid & ATTR_SIZE &&
3266 sattr->ia_size < i_size_read(inode))
24028672 3267 pnfs_commit_and_return_layout(inode);
8a1636c4 3268
0e574af1 3269 nfs_fattr_init(fattr);
1da177e4 3270
2669940d
AA		 3271 /* Deal with open(O_TRUNC) */
3272 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3273 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3274
3275 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3276 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3277 return 0;
3278
d530838b 3279 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3280 if (sattr->ia_valid & ATTR_FILE) {
3281 struct nfs_open_context *ctx;
3282
3283 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3284 if (ctx) {
3285 cred = ctx->cred;
3286 state = ctx->state;
3287 }
659bfcd6 3288 }
08e9eac4 3289
14c43f76
DQ		 3290 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3291 if (IS_ERR(label))
3292 return PTR_ERR(label);
3293
3294 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3295 if (status == 0) {
f044636d 3296 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3297 nfs_setsecurity(inode, fattr, label);
3298 }
14c43f76 3299 nfs4_label_free(label);
1da177e4
LT		 3300 return status;
3301}
3302
0c2e53f1
TM		 3303static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3304 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3305 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3306{
0c2e53f1 3307 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3308 int status;
3309 struct nfs4_lookup_arg args = {
3310 .bitmask = server->attr_bitmask,
0c2e53f1 3311 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3312 .name = name,
3313 };
3314 struct nfs4_lookup_res res = {
3315 .server = server,
3316 .fattr = fattr,
aa9c2669 3317 .label = label,
2b3de441
DH		 3318 .fh = fhandle,
3319 };
3320 struct rpc_message msg = {
3321 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3322 .rpc_argp = &args,
3323 .rpc_resp = &res,
3324 };
3325
aa9c2669
DQ		 3326 args.bitmask = nfs4_bitmask(server, label);
3327
2b3de441
DH		 3328 nfs_fattr_init(fattr);
3329
1da177e4 3330 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3331 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3332 dprintk("NFS reply lookup: %d\n", status);
3333 return status;
3334}
3335
72de53ec 3336static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3337{
7ebb9315 3338 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3339 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3340 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3341 fattr->nlink = 2;
3342}
3343
72de53ec
BS		 3344static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3345 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3346 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3347{
3348 struct nfs4_exception exception = { };
72de53ec 3349 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3350 int err;
3351 do {
1775fd3e 3352 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3353 trace_nfs4_lookup(dir, name, err);
72de53ec 3354 switch (err) {
08ef7bd3 3355 case -NFS4ERR_BADNAME:
72de53ec
BS		 3356 err = -ENOENT;
3357 goto out;
0c2e53f1 3358 case -NFS4ERR_MOVED:
f05d147f 3359 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3360 goto out;
0c2e53f1 3361 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3362 err = -EPERM;
3363 if (client != *clnt)
3364 goto out;
66b06860 3365 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3366 if (IS_ERR(client))
3367 return PTR_ERR(client);
3368
3369 exception.retry = 1;
3370 break;
3371 default:
3372 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3373 }
1da177e4 3374 } while (exception.retry);
72de53ec
BS		 3375
3376out:
3377 if (err == 0)
3378 *clnt = client;
3379 else if (client != *clnt)
3380 rpc_shutdown_client(client);
3381
1da177e4
LT		 3382 return err;
3383}
3384
80a16b21 3385static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3386 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3387 struct nfs4_label *label)
72de53ec
BS		 3388{
3389 int status;
3390 struct rpc_clnt *client = NFS_CLIENT(dir);
3391
1775fd3e 3392 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3393 if (client != NFS_CLIENT(dir)) {
3394 rpc_shutdown_client(client);
3395 nfs_fixup_secinfo_attributes(fattr);
3396 }
3397 return status;
3398}
3399
f05d147f
BS		 3400struct rpc_clnt *
3401nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3402 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3403{
b72888cb 3404 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3405 int status;
f05d147f 3406
1775fd3e 3407 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3408 if (status < 0)
f05d147f 3409 return ERR_PTR(status);
b72888cb 3410 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3411}
3412
1da177e4
LT		 3413static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3414{
76b32999 3415 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3416 struct nfs4_accessargs args = {
3417 .fh = NFS_FH(inode),
a4980e78 3418 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3419 };
3420 struct nfs4_accessres res = {
3421 .server = server,
1da177e4 3422 };
1da177e4
LT		 3423 struct rpc_message msg = {
3424 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3425 .rpc_argp = &args,
3426 .rpc_resp = &res,
3427 .rpc_cred = entry->cred,
3428 };
3429 int mode = entry->mask;
aa9c2669 3430 int status = 0;
1da177e4
LT		 3431
3432 /*
3433 * Determine which access bits we want to ask for...
3434 */
3435 if (mode & MAY_READ)
3436 args.access |= NFS4_ACCESS_READ;
3437 if (S_ISDIR(inode->i_mode)) {
3438 if (mode & MAY_WRITE)
3439 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3440 if (mode & MAY_EXEC)
3441 args.access |= NFS4_ACCESS_LOOKUP;
3442 } else {
3443 if (mode & MAY_WRITE)
3444 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3445 if (mode & MAY_EXEC)
3446 args.access |= NFS4_ACCESS_EXECUTE;
3447 }
c407d41a
TM		 3448
3449 res.fattr = nfs_alloc_fattr();
3450 if (res.fattr == NULL)
3451 return -ENOMEM;
3452
7c513058 3453 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3454 if (!status) {
6168f62c 3455 nfs_access_set_mask(entry, res.access);
c407d41a 3456 nfs_refresh_inode(inode, res.fattr);
1da177e4 3457 }
c407d41a 3458 nfs_free_fattr(res.fattr);
1da177e4
LT		 3459 return status;
3460}
3461
3462static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3463{
3464 struct nfs4_exception exception = { };
3465 int err;
3466 do {
c1578b76
TM		 3467 err = _nfs4_proc_access(inode, entry);
3468 trace_nfs4_access(inode, err);
3469 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3470 &exception);
3471 } while (exception.retry);
3472 return err;
3473}
3474
3475/*
3476 * TODO: For the time being, we don't try to get any attributes
3477 * along with any of the zero-copy operations READ, READDIR,
3478 * READLINK, WRITE.
3479 *
3480 * In the case of the first three, we want to put the GETATTR
3481 * after the read-type operation -- this is because it is hard
3482 * to predict the length of a GETATTR response in v4, and thus
3483 * align the READ data correctly. This means that the GETATTR
3484 * may end up partially falling into the page cache, and we should
3485 * shift it into the 'tail' of the xdr_buf before processing.
3486 * To do this efficiently, we need to know the total length
3487 * of data received, which doesn't seem to be available outside
3488 * of the RPC layer.
3489 *
3490 * In the case of WRITE, we also want to put the GETATTR after
3491 * the operation -- in this case because we want to make sure
140150db 3492 * we get the post-operation mtime and size.
1da177e4
LT		 3493 *
3494 * Both of these changes to the XDR layer would in fact be quite
3495 * minor, but I decided to leave them for a subsequent patch.
3496 */
3497static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3498 unsigned int pgbase, unsigned int pglen)
3499{
3500 struct nfs4_readlink args = {
3501 .fh = NFS_FH(inode),
3502 .pgbase = pgbase,
3503 .pglen = pglen,
3504 .pages = &page,
3505 };
f50c7000 3506 struct nfs4_readlink_res res;
1da177e4
LT		 3507 struct rpc_message msg = {
3508 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3509 .rpc_argp = &args,
f50c7000 3510 .rpc_resp = &res,
1da177e4
LT		 3511 };
3512
7c513058 3513 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3514}
3515
3516static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3517 unsigned int pgbase, unsigned int pglen)
3518{
3519 struct nfs4_exception exception = { };
3520 int err;
3521 do {
c1578b76
TM		 3522 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3523 trace_nfs4_readlink(inode, err);
3524 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3525 &exception);
3526 } while (exception.retry);
3527 return err;
3528}
3529
1da177e4 3530/*
8867fe58 3531 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3532 */
1da177e4
LT		 3533static int
3534nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3535 int flags)
1da177e4 3536{
aa9c2669 3537 struct nfs4_label l, *ilabel = NULL;
8867fe58 3538 struct nfs_open_context *ctx;
1da177e4 3539 struct nfs4_state *state;
5bc2afc2 3540 int opened = 0;
1da177e4
LT		 3541 int status = 0;
3542
8867fe58
MS		 3543 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3544 if (IS_ERR(ctx))
3545 return PTR_ERR(ctx);
3546
aa9c2669
DQ		 3547 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3548
a8a5da99 3549 sattr->ia_mode &= ~current_umask();
5bc2afc2 3550 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3551 if (IS_ERR(state)) {
3552 status = PTR_ERR(state);
c0204fd2 3553 goto out;
1da177e4 3554 }
1da177e4 3555out:
aa9c2669 3556 nfs4_label_release_security(ilabel);
8867fe58 3557 put_nfs_open_context(ctx);
1da177e4
LT		 3558 return status;
3559}
3560
3561static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3562{
16e42959 3563 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3564 struct nfs_removeargs args = {
1da177e4 3565 .fh = NFS_FH(dir),
26fe5750 3566 .name = *name,
16e42959 3567 };
4fdc17b2 3568 struct nfs_removeres res = {
16e42959 3569 .server = server,
1da177e4 3570 };
1da177e4 3571 struct rpc_message msg = {
4fdc17b2
TM		 3572 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3573 .rpc_argp = &args,
3574 .rpc_resp = &res,
1da177e4 3575 };
778d2817 3576 int status;
1da177e4 3577
7c513058 3578 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3579 if (status == 0)
16e42959 3580 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3581 return status;
3582}
3583
3584static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3585{
3586 struct nfs4_exception exception = { };
3587 int err;
3588 do {
078ea3df
TM		 3589 err = _nfs4_proc_remove(dir, name);
3590 trace_nfs4_remove(dir, name, err);
3591 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3592 &exception);
3593 } while (exception.retry);
3594 return err;
3595}
3596
e4eff1a6 3597static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3598{
e4eff1a6
TM		 3599 struct nfs_server *server = NFS_SERVER(dir);
3600 struct nfs_removeargs *args = msg->rpc_argp;
3601 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3602
e4eff1a6 3603 res->server = server;
1da177e4 3604 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3605 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3606
3607 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3608}
3609
34e137cc
BS		 3610static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3611{
d9afbd1b
TM		 3612 nfs4_setup_sequence(NFS_SERVER(data->dir),
3613 &data->args.seq_args,
3614 &data->res.seq_res,
3615 task);
1da177e4
LT		 3616}
3617
e4eff1a6 3618static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3619{
078ea3df
TM		 3620 struct nfs_unlinkdata *data = task->tk_calldata;
3621 struct nfs_removeres *res = &data->res;
e4eff1a6 3622
14516c3a
TM		 3623 if (!nfs4_sequence_done(task, &res->seq_res))
3624 return 0;
8478eaa1
N		 3625 if (nfs4_async_handle_error(task, res->server, NULL,
3626 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3627 return 0;
3628 update_changeattr(dir, &res->cinfo);
e4eff1a6 3629 return 1;
1da177e4
LT		 3630}
3631
d3d4152a
JL		 3632static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3633{
3634 struct nfs_server *server = NFS_SERVER(dir);
3635 struct nfs_renameargs *arg = msg->rpc_argp;
3636 struct nfs_renameres *res = msg->rpc_resp;
3637
3638 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3639 res->server = server;
a9c92d6b 3640 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3641}
3642
c6bfa1a1
BS		 3643static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3644{
d9afbd1b
TM		 3645 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3646 &data->args.seq_args,
3647 &data->res.seq_res,
3648 task);
d3d4152a
JL		 3649}
3650
3651static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3652 struct inode *new_dir)
3653{
fbc6f7c2
TM		 3654 struct nfs_renamedata *data = task->tk_calldata;
3655 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3656
3657 if (!nfs4_sequence_done(task, &res->seq_res))
3658 return 0;
8478eaa1 3659 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3660 return 0;
3661
3662 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3663 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3664 return 1;
3665}
3666
1da177e4
LT		 3667static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3668{
91ba2eee 3669 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3670 struct nfs4_link_arg arg = {
3671 .fh = NFS_FH(inode),
3672 .dir_fh = NFS_FH(dir),
3673 .name = name,
91ba2eee
TM		 3674 .bitmask = server->attr_bitmask,
3675 };
91ba2eee
TM		 3676 struct nfs4_link_res res = {
3677 .server = server,
1775fd3e 3678 .label = NULL,
1da177e4 3679 };
1da177e4
LT		 3680 struct rpc_message msg = {
3681 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3682 .rpc_argp = &arg,
91ba2eee 3683 .rpc_resp = &res,
1da177e4 3684 };
136f2627
TM		 3685 int status = -ENOMEM;
3686
3687 res.fattr = nfs_alloc_fattr();
778d2817 3688 if (res.fattr == NULL)
136f2627 3689 goto out;
1da177e4 3690
14c43f76
DQ		 3691 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3692 if (IS_ERR(res.label)) {
3693 status = PTR_ERR(res.label);
3694 goto out;
3695 }
aa9c2669 3696 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3697
7c513058 3698 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3699 if (!status) {
3700 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3701 status = nfs_post_op_update_inode(inode, res.fattr);
3702 if (!status)
3703 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3704 }
14c43f76
DQ		 3705
3706
3707 nfs4_label_free(res.label);
3708
136f2627 3709out:
136f2627 3710 nfs_free_fattr(res.fattr);
1da177e4
LT		 3711 return status;
3712}
3713
3714static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3715{
3716 struct nfs4_exception exception = { };
3717 int err;
3718 do {
3719 err = nfs4_handle_exception(NFS_SERVER(inode),
3720 _nfs4_proc_link(inode, dir, name),
3721 &exception);
3722 } while (exception.retry);
3723 return err;
3724}
3725
57dc9a57
TM		 3726struct nfs4_createdata {
3727 struct rpc_message msg;
3728 struct nfs4_create_arg arg;
3729 struct nfs4_create_res res;
3730 struct nfs_fh fh;
3731 struct nfs_fattr fattr;
1775fd3e 3732 struct nfs4_label *label;
57dc9a57
TM		 3733};
3734
3735static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3736 struct qstr *name, struct iattr *sattr, u32 ftype)
3737{
3738 struct nfs4_createdata *data;
3739
3740 data = kzalloc(sizeof(*data), GFP_KERNEL);
3741 if (data != NULL) {
3742 struct nfs_server *server = NFS_SERVER(dir);
3743
14c43f76
DQ		 3744 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3745 if (IS_ERR(data->label))
3746 goto out_free;
3747
57dc9a57
TM		 3748 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3749 data->msg.rpc_argp = &data->arg;
3750 data->msg.rpc_resp = &data->res;
3751 data->arg.dir_fh = NFS_FH(dir);
3752 data->arg.server = server;
3753 data->arg.name = name;
3754 data->arg.attrs = sattr;
3755 data->arg.ftype = ftype;
aa9c2669 3756 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3757 data->res.server = server;
3758 data->res.fh = &data->fh;
3759 data->res.fattr = &data->fattr;
1775fd3e 3760 data->res.label = data->label;
57dc9a57 3761 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3762 }
3763 return data;
14c43f76
DQ		 3764out_free:
3765 kfree(data);
3766 return NULL;
57dc9a57
TM		 3767}
3768
3769static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3770{
7c513058 3771 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3772 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3773 if (status == 0) {
3774 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3775 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3776 }
3777 return status;
3778}
3779
3780static void nfs4_free_createdata(struct nfs4_createdata *data)
3781{
14c43f76 3782 nfs4_label_free(data->label);
57dc9a57
TM		 3783 kfree(data);
3784}
3785
4f390c15 3786static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3787 struct page *page, unsigned int len, struct iattr *sattr,
3788 struct nfs4_label *label)
1da177e4 3789{
57dc9a57
TM		 3790 struct nfs4_createdata *data;
3791 int status = -ENAMETOOLONG;
1da177e4 3792
94a6d753 3793 if (len > NFS4_MAXPATHLEN)
57dc9a57 3794 goto out;
4f390c15 3795
57dc9a57
TM		 3796 status = -ENOMEM;
3797 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3798 if (data == NULL)
3799 goto out;
3800
3801 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3802 data->arg.u.symlink.pages = &page;
3803 data->arg.u.symlink.len = len;
1775fd3e 3804 data->arg.label = label;
1da177e4 3805
57dc9a57
TM		 3806 status = nfs4_do_create(dir, dentry, data);
3807
3808 nfs4_free_createdata(data);
3809out:
1da177e4
LT		 3810 return status;
3811}
3812
4f390c15 3813static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3814 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3815{
3816 struct nfs4_exception exception = { };
aa9c2669 3817 struct nfs4_label l, *label = NULL;
1da177e4 3818 int err;
aa9c2669
DQ		 3819
3820 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3821
1da177e4 3822 do {
078ea3df
TM		 3823 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3824 trace_nfs4_symlink(dir, &dentry->d_name, err);
3825 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3826 &exception);
3827 } while (exception.retry);
aa9c2669
DQ		 3828
3829 nfs4_label_release_security(label);
1da177e4
LT		 3830 return err;
3831}
3832
3833static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3834 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3835{
57dc9a57
TM		 3836 struct nfs4_createdata *data;
3837 int status = -ENOMEM;
1da177e4 3838
57dc9a57
TM		 3839 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3840 if (data == NULL)
3841 goto out;
3842
1775fd3e 3843 data->arg.label = label;
57dc9a57
TM		 3844 status = nfs4_do_create(dir, dentry, data);
3845
3846 nfs4_free_createdata(data);
3847out:
1da177e4
LT		 3848 return status;
3849}
3850
3851static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3852 struct iattr *sattr)
3853{
3854 struct nfs4_exception exception = { };
aa9c2669 3855 struct nfs4_label l, *label = NULL;
1da177e4 3856 int err;
a8a5da99 3857
aa9c2669
DQ		 3858 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3859
a8a5da99 3860 sattr->ia_mode &= ~current_umask();
1da177e4 3861 do {
078ea3df
TM		 3862 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3863 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3864 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3865 &exception);
3866 } while (exception.retry);
aa9c2669
DQ		 3867 nfs4_label_release_security(label);
3868
1da177e4
LT		 3869 return err;
3870}
3871
3872static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3873 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3874{
3875 struct inode *dir = dentry->d_inode;
3876 struct nfs4_readdir_arg args = {
3877 .fh = NFS_FH(dir),
56e4ebf8 3878 .pages = pages,
1da177e4
LT		 3879 .pgbase = 0,
3880 .count = count,
96d25e53 3881 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3882 .plus = plus,
1da177e4
LT		 3883 };
3884 struct nfs4_readdir_res res;
3885 struct rpc_message msg = {
3886 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3887 .rpc_argp = &args,
3888 .rpc_resp = &res,
3889 .rpc_cred = cred,
3890 };
3891 int status;
3892
6de1472f
AV		 3893 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3894 dentry,
eadf4598 3895 (unsigned long long)cookie);
c3f52af3 3896 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3897 res.pgbase = args.pgbase;
7c513058 3898 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3899 if (status >= 0) {
c3f52af3 3900 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3901 status += args.pgbase;
3902 }
c4812998
TM		 3903
3904 nfs_invalidate_atime(dir);
3905
3110ff80 3906 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3907 return status;
3908}
3909
3910static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3911 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3912{
3913 struct nfs4_exception exception = { };
3914 int err;
3915 do {
c1578b76
TM		 3916 err = _nfs4_proc_readdir(dentry, cred, cookie,
3917 pages, count, plus);
3918 trace_nfs4_readdir(dentry->d_inode, err);
3919 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3920 &exception);
3921 } while (exception.retry);
3922 return err;
3923}
3924
3925static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3926 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3927{
57dc9a57
TM		 3928 struct nfs4_createdata *data;
3929 int mode = sattr->ia_mode;
3930 int status = -ENOMEM;
1da177e4 3931
57dc9a57
TM		 3932 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3933 if (data == NULL)
3934 goto out;
3935
1da177e4 3936 if (S_ISFIFO(mode))
57dc9a57 3937 data->arg.ftype = NF4FIFO;
1da177e4 3938 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3939 data->arg.ftype = NF4BLK;
3940 data->arg.u.device.specdata1 = MAJOR(rdev);
3941 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3942 }
3943 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3944 data->arg.ftype = NF4CHR;
3945 data->arg.u.device.specdata1 = MAJOR(rdev);
3946 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3947 } else if (!S_ISSOCK(mode)) {
3948 status = -EINVAL;
3949 goto out_free;
1da177e4 3950 }
1775fd3e 3951
aa9c2669 3952 data->arg.label = label;
57dc9a57 3953 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3954out_free:
57dc9a57
TM		 3955 nfs4_free_createdata(data);
3956out:
1da177e4
LT		 3957 return status;
3958}
3959
3960static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3961 struct iattr *sattr, dev_t rdev)
3962{
3963 struct nfs4_exception exception = { };
aa9c2669 3964 struct nfs4_label l, *label = NULL;
1da177e4 3965 int err;
a8a5da99 3966
aa9c2669
DQ		 3967 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3968
a8a5da99 3969 sattr->ia_mode &= ~current_umask();
1da177e4 3970 do {
078ea3df
TM		 3971 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3972 trace_nfs4_mknod(dir, &dentry->d_name, err);
3973 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3974 &exception);
3975 } while (exception.retry);
aa9c2669
DQ		 3976
3977 nfs4_label_release_security(label);
3978
1da177e4
LT		 3979 return err;
3980}
3981
3982static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3983 struct nfs_fsstat *fsstat)
3984{
3985 struct nfs4_statfs_arg args = {
3986 .fh = fhandle,
3987 .bitmask = server->attr_bitmask,
3988 };
24ad148a
BH		 3989 struct nfs4_statfs_res res = {
3990 .fsstat = fsstat,
3991 };
1da177e4
LT		 3992 struct rpc_message msg = {
3993 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3994 .rpc_argp = &args,
24ad148a 3995 .rpc_resp = &res,
1da177e4
LT		 3996 };
3997
0e574af1 3998 nfs_fattr_init(fsstat->fattr);
7c513058 3999 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4000}
4001
4002static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4003{
4004 struct nfs4_exception exception = { };
4005 int err;
4006 do {
4007 err = nfs4_handle_exception(server,
4008 _nfs4_proc_statfs(server, fhandle, fsstat),
4009 &exception);
4010 } while (exception.retry);
4011 return err;
4012}
4013
4014static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4015 struct nfs_fsinfo *fsinfo)
4016{
4017 struct nfs4_fsinfo_arg args = {
4018 .fh = fhandle,
4019 .bitmask = server->attr_bitmask,
4020 };
3dda5e43
BH		 4021 struct nfs4_fsinfo_res res = {
4022 .fsinfo = fsinfo,
4023 };
1da177e4
LT		 4024 struct rpc_message msg = {
4025 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4026 .rpc_argp = &args,
3dda5e43 4027 .rpc_resp = &res,
1da177e4
LT		 4028 };
4029
7c513058 4030 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4031}
4032
4033static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4034{
4035 struct nfs4_exception exception = { };
83ca7f5a 4036 unsigned long now = jiffies;
1da177e4
LT		 4037 int err;
4038
4039 do {
83ca7f5a 4040 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4041 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4042 if (err == 0) {
4043 struct nfs_client *clp = server->nfs_client;
4044
4045 spin_lock(&clp->cl_lock);
4046 clp->cl_lease_time = fsinfo->lease_time * HZ;
4047 clp->cl_last_renewal = now;
4048 spin_unlock(&clp->cl_lock);
4049 break;
4050 }
4051 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4052 } while (exception.retry);
4053 return err;
4054}
4055
4056static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4057{
e38eb650
BS		 4058 int error;
4059
0e574af1 4060 nfs_fattr_init(fsinfo->fattr);
e38eb650 4061 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4062 if (error == 0) {
4063 /* block layout checks this! */
4064 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4065 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4066 }
e38eb650
BS		 4067
4068 return error;
1da177e4
LT		 4069}
4070
4071static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4072 struct nfs_pathconf *pathconf)
4073{
4074 struct nfs4_pathconf_arg args = {
4075 .fh = fhandle,
4076 .bitmask = server->attr_bitmask,
4077 };
d45b2989
BH		 4078 struct nfs4_pathconf_res res = {
4079 .pathconf = pathconf,
4080 };
1da177e4
LT		 4081 struct rpc_message msg = {
4082 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4083 .rpc_argp = &args,
d45b2989 4084 .rpc_resp = &res,
1da177e4
LT		 4085 };
4086
4087 /* None of the pathconf attributes are mandatory to implement */
4088 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4089 memset(pathconf, 0, sizeof(*pathconf));
4090 return 0;
4091 }
4092
0e574af1 4093 nfs_fattr_init(pathconf->fattr);
7c513058 4094 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4095}
4096
4097static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4098 struct nfs_pathconf *pathconf)
4099{
4100 struct nfs4_exception exception = { };
4101 int err;
4102
4103 do {
4104 err = nfs4_handle_exception(server,
4105 _nfs4_proc_pathconf(server, fhandle, pathconf),
4106 &exception);
4107 } while (exception.retry);
4108 return err;
4109}
4110
5521abfd 4111int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4112 const struct nfs_open_context *ctx,
4113 const struct nfs_lock_context *l_ctx,
4114 fmode_t fmode)
4115{
4116 const struct nfs_lockowner *lockowner = NULL;
4117
4118 if (l_ctx != NULL)
4119 lockowner = &l_ctx->lockowner;
5521abfd 4120 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4121}
4122EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4123
5521abfd
TM		 4124static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4125 const struct nfs_open_context *ctx,
4126 const struct nfs_lock_context *l_ctx,
4127 fmode_t fmode)
4128{
4129 nfs4_stateid current_stateid;
4130
e1253be0
TM		 4131 /* If the current stateid represents a lost lock, then exit */
4132 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4133 return true;
5521abfd
TM		 4134 return nfs4_stateid_match(stateid, &current_stateid);
4135}
4136
4137static bool nfs4_error_stateid_expired(int err)
4138{
4139 switch (err) {
4140 case -NFS4ERR_DELEG_REVOKED:
4141 case -NFS4ERR_ADMIN_REVOKED:
4142 case -NFS4ERR_BAD_STATEID:
4143 case -NFS4ERR_STALE_STATEID:
4144 case -NFS4ERR_OLD_STATEID:
4145 case -NFS4ERR_OPENMODE:
4146 case -NFS4ERR_EXPIRED:
4147 return true;
4148 }
4149 return false;
4150}
4151
d45f60c6 4152void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4153{
d45f60c6 4154 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4155}
4156
d45f60c6 4157static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4158{
d45f60c6 4159 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4160
d45f60c6
WAA		 4161 trace_nfs4_read(hdr, task->tk_status);
4162 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4163 hdr->args.context->state,
4164 NULL) == -EAGAIN) {
d00c5d43 4165 rpc_restart_call_prepare(task);
ec06c096 4166 return -EAGAIN;
1da177e4 4167 }
8850df99 4168
d45f60c6 4169 __nfs4_read_done_cb(hdr);
1da177e4 4170 if (task->tk_status > 0)
d45f60c6 4171 renew_lease(server, hdr->timestamp);
ec06c096 4172 return 0;
1da177e4
LT		 4173}
4174
5521abfd 4175static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4176 struct nfs_pgio_args *args)
5521abfd
TM		 4177{
4178
4179 if (!nfs4_error_stateid_expired(task->tk_status) ||
4180 nfs4_stateid_is_current(&args->stateid,
4181 args->context,
4182 args->lock_context,
4183 FMODE_READ))
4184 return false;
4185 rpc_restart_call_prepare(task);
4186 return true;
4187}
4188
d45f60c6 4189static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4190{
4191
4192 dprintk("--> %s\n", __func__);
4193
d45f60c6 4194 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4195 return -EAGAIN;
d45f60c6 4196 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4197 return -EAGAIN;
d45f60c6
WAA		 4198 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4199 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4200}
4201
d45f60c6
WAA		 4202static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4203 struct rpc_message *msg)
1da177e4 4204{
d45f60c6
WAA		 4205 hdr->timestamp = jiffies;
4206 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4207 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4208 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4209}
4210
d45f60c6
WAA		 4211static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4212 struct nfs_pgio_header *hdr)
ea7c3303 4213{
d45f60c6
WAA		 4214 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4215 &hdr->args.seq_args,
4216 &hdr->res.seq_res,
9b206149 4217 task))
ef1820f9 4218 return 0;
d45f60c6
WAA		 4219 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4220 hdr->args.lock_context,
4221 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4222 return -EIO;
d45f60c6 4223 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4224 return -EIO;
4225 return 0;
1da177e4
LT		 4226}
4227
d45f60c6
WAA		 4228static int nfs4_write_done_cb(struct rpc_task *task,
4229 struct nfs_pgio_header *hdr)
1da177e4 4230{
d45f60c6 4231 struct inode *inode = hdr->inode;
8478eaa1 4232
d45f60c6
WAA		 4233 trace_nfs4_write(hdr, task->tk_status);
4234 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4235 hdr->args.context->state,
4236 NULL) == -EAGAIN) {
d00c5d43 4237 rpc_restart_call_prepare(task);
788e7a89 4238 return -EAGAIN;
1da177e4 4239 }
4f9838c7 4240 if (task->tk_status >= 0) {
d45f60c6 4241 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4242 nfs_writeback_update_inode(hdr);
4f9838c7 4243 }
788e7a89 4244 return 0;
1da177e4
LT		 4245}
4246
5521abfd 4247static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4248 struct nfs_pgio_args *args)
5521abfd
TM		 4249{
4250
4251 if (!nfs4_error_stateid_expired(task->tk_status) ||
4252 nfs4_stateid_is_current(&args->stateid,
4253 args->context,
4254 args->lock_context,
4255 FMODE_WRITE))
4256 return false;
4257 rpc_restart_call_prepare(task);
4258 return true;
4259}
4260
d45f60c6 4261static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4262{
d45f60c6 4263 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4264 return -EAGAIN;
d45f60c6 4265 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4266 return -EAGAIN;
d45f60c6
WAA		 4267 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4268 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4269}
4270
5a37f851 4271static
d45f60c6 4272bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4273{
5a37f851 4274 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4275 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4276 return false;
4277 /* Otherwise, request attributes if and only if we don't hold
4278 * a delegation
4279 */
011e2a7f 4280 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4281}
a69aef14 4282
d45f60c6
WAA		 4283static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4284 struct rpc_message *msg)
1da177e4 4285{
d45f60c6 4286 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4287
d45f60c6
WAA		 4288 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4289 hdr->args.bitmask = NULL;
4290 hdr->res.fattr = NULL;
7ffd1064 4291 } else
d45f60c6 4292 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4293
d45f60c6
WAA		 4294 if (!hdr->pgio_done_cb)
4295 hdr->pgio_done_cb = nfs4_write_done_cb;
4296 hdr->res.server = server;
4297 hdr->timestamp = jiffies;
1da177e4 4298
bdc7f021 4299 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4300 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4301}
4302
0b7c0153 4303static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4304{
d9afbd1b
TM		 4305 nfs4_setup_sequence(NFS_SERVER(data->inode),
4306 &data->args.seq_args,
4307 &data->res.seq_res,
4308 task);
1da177e4
LT		 4309}
4310
0b7c0153 4311static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4312{
1da177e4 4313 struct inode *inode = data->inode;
14516c3a 4314
cc668ab3 4315 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4316 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4317 NULL, NULL) == -EAGAIN) {
d00c5d43 4318 rpc_restart_call_prepare(task);
788e7a89 4319 return -EAGAIN;
1da177e4 4320 }
788e7a89 4321 return 0;
1da177e4
LT		 4322}
4323
0b7c0153 4324static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4325{
4326 if (!nfs4_sequence_done(task, &data->res.seq_res))
4327 return -EAGAIN;
0b7c0153 4328 return data->commit_done_cb(task, data);
5f452431
FI		 4329}
4330
0b7c0153 4331static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4332{
788e7a89 4333 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4334
0b7c0153
FI		 4335 if (data->commit_done_cb == NULL)
4336 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4337 data->res.server = server;
bdc7f021 4338 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4339 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4340}
4341
9bc4e3ca
CL		 4342struct nfs4_renewdata {
4343 struct nfs_client *client;
4344 unsigned long timestamp;
4345};
4346
1da177e4
LT		 4347/*
4348 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4349 * standalone procedure for queueing an asynchronous RENEW.
4350 */
9bc4e3ca 4351static void nfs4_renew_release(void *calldata)
dc96aef9 4352{
9bc4e3ca
CL		 4353 struct nfs4_renewdata *data = calldata;
4354 struct nfs_client *clp = data->client;
dc96aef9 4355
0851de06
AB		 4356 if (atomic_read(&clp->cl_count) > 1)
4357 nfs4_schedule_state_renewal(clp);
4358 nfs_put_client(clp);
9bc4e3ca 4359 kfree(data);
dc96aef9
AB		 4360}
4361
9bc4e3ca 4362static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4363{
9bc4e3ca
CL		 4364 struct nfs4_renewdata *data = calldata;
4365 struct nfs_client *clp = data->client;
4366 unsigned long timestamp = data->timestamp;
1da177e4 4367
c6d01c6f 4368 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4369 switch (task->tk_status) {
4370 case 0:
4371 break;
4372 case -NFS4ERR_LEASE_MOVED:
4373 nfs4_schedule_lease_moved_recovery(clp);
4374 break;
4375 default:
95baa25c 4376 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4377 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4378 return;
4379 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4380 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4381 return;
4382 }
4383 nfs4_schedule_path_down_recovery(clp);
1da177e4 4384 }
452e9352 4385 do_renew_lease(clp, timestamp);
1da177e4
LT		 4386}
4387
963d8fe5
TM		 4388static const struct rpc_call_ops nfs4_renew_ops = {
4389 .rpc_call_done = nfs4_renew_done,
dc96aef9 4390 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4391};
4392
2f60ea6b 4393static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4394{
4395 struct rpc_message msg = {
4396 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4397 .rpc_argp = clp,
b4454fe1 4398 .rpc_cred = cred,
1da177e4 4399 };
9bc4e3ca 4400 struct nfs4_renewdata *data;
1da177e4 4401
2f60ea6b
TM		 4402 if (renew_flags == 0)
4403 return 0;
0851de06
AB		 4404 if (!atomic_inc_not_zero(&clp->cl_count))
4405 return -EIO;
b569ad34 4406 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4407 if (data == NULL)
4408 return -ENOMEM;
4409 data->client = clp;
4410 data->timestamp = jiffies;
bc7a05ca 4411 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4412 &nfs4_renew_ops, data);
1da177e4
LT		 4413}
4414
8534d4ec 4415static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4416{
4417 struct rpc_message msg = {
4418 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4419 .rpc_argp = clp,
b4454fe1 4420 .rpc_cred = cred,
1da177e4
LT		 4421 };
4422 unsigned long now = jiffies;
4423 int status;
4424
bc7a05ca 4425 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4426 if (status < 0)
4427 return status;
452e9352 4428 do_renew_lease(clp, now);
1da177e4
LT		 4429 return 0;
4430}
4431
aa1870af
BF		 4432static inline int nfs4_server_supports_acls(struct nfs_server *server)
4433{
7dd7d959 4434 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4435}
4436
21f498c2
TM		 4437/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4438 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4439 * the stack.
4440 */
21f498c2 4441#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4442
e9e3d724
NH		 4443static int buf_to_pages_noslab(const void *buf, size_t buflen,
4444 struct page **pages, unsigned int *pgbase)
4445{
4446 struct page *newpage, **spages;
4447 int rc = 0;
4448 size_t len;
4449 spages = pages;
4450
4451 do {
21f498c2 4452 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4453 newpage = alloc_page(GFP_KERNEL);
4454
4455 if (newpage == NULL)
4456 goto unwind;
4457 memcpy(page_address(newpage), buf, len);
4458 buf += len;
4459 buflen -= len;
4460 *pages++ = newpage;
4461 rc++;
4462 } while (buflen != 0);
4463
4464 return rc;
4465
4466unwind:
4467 for(; rc > 0; rc--)
4468 __free_page(spages[rc-1]);
4469 return -ENOMEM;
4470}
4471
e50a1c2e
BF		 4472struct nfs4_cached_acl {
4473 int cached;
4474 size_t len;
3e9d4154 4475 char data[0];
e50a1c2e
BF		 4476};
4477
4478static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4479{
4480 struct nfs_inode *nfsi = NFS_I(inode);
4481
4482 spin_lock(&inode->i_lock);
4483 kfree(nfsi->nfs4_acl);
4484 nfsi->nfs4_acl = acl;
4485 spin_unlock(&inode->i_lock);
4486}
4487
4488static void nfs4_zap_acl_attr(struct inode *inode)
4489{
4490 nfs4_set_cached_acl(inode, NULL);
4491}
4492
4493static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4494{
4495 struct nfs_inode *nfsi = NFS_I(inode);
4496 struct nfs4_cached_acl *acl;
4497 int ret = -ENOENT;
4498
4499 spin_lock(&inode->i_lock);
4500 acl = nfsi->nfs4_acl;
4501 if (acl == NULL)
4502 goto out;
4503 if (buf == NULL) /* user is just asking for length */
4504 goto out_len;
4505 if (acl->cached == 0)
4506 goto out;
4507 ret = -ERANGE; /* see getxattr(2) man page */
4508 if (acl->len > buflen)
4509 goto out;
4510 memcpy(buf, acl->data, acl->len);
4511out_len:
4512 ret = acl->len;
4513out:
4514 spin_unlock(&inode->i_lock);
4515 return ret;
4516}
4517
5794d21e 4518static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4519{
4520 struct nfs4_cached_acl *acl;
b291f1b1 4521 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4522
1f1ea6c2 4523 if (buflen <= PAGE_SIZE) {
b291f1b1 4524 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4525 if (acl == NULL)
4526 goto out;
4527 acl->cached = 1;
5794d21e 4528 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4529 } else {
4530 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4531 if (acl == NULL)
4532 goto out;
4533 acl->cached = 0;
4534 }
4535 acl->len = acl_len;
4536out:
4537 nfs4_set_cached_acl(inode, acl);
4538}
4539
bf118a34
AA		 4540/*
4541 * The getxattr API returns the required buffer length when called with a
4542 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4543 * the required buf. On a NULL buf, we send a page of data to the server
4544 * guessing that the ACL request can be serviced by a page. If so, we cache
4545 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4546 * the cache. If not so, we throw away the page, and cache the required
4547 * length. The next getxattr call will then produce another round trip to
4548 * the server, this time with the input buf of the required size.
4549 */
16b4289c 4550static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4551{
bf118a34 4552 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4553 struct nfs_getaclargs args = {
4554 .fh = NFS_FH(inode),
4555 .acl_pages = pages,
4556 .acl_len = buflen,
4557 };
663c79b3
BH		 4558 struct nfs_getaclres res = {
4559 .acl_len = buflen,
4560 };
aa1870af
BF		 4561 struct rpc_message msg = {
4562 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4563 .rpc_argp = &args,
663c79b3 4564 .rpc_resp = &res,
aa1870af 4565 };
21f498c2
TM		 4566 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4567 int ret = -ENOMEM, i;
aa1870af 4568
bf118a34
AA		 4569 /* As long as we're doing a round trip to the server anyway,
4570 * let's be prepared for a page of acl data. */
4571 if (npages == 0)
4572 npages = 1;
21f498c2
TM		 4573 if (npages > ARRAY_SIZE(pages))
4574 return -ERANGE;
5a006899 4575
bf118a34
AA		 4576 for (i = 0; i < npages; i++) {
4577 pages[i] = alloc_page(GFP_KERNEL);
4578 if (!pages[i])
4579 goto out_free;
e50a1c2e 4580 }
5a006899
SP		 4581
4582 /* for decoding across pages */
4583 res.acl_scratch = alloc_page(GFP_KERNEL);
4584 if (!res.acl_scratch)
4585 goto out_free;
4586
bf118a34
AA		 4587 args.acl_len = npages * PAGE_SIZE;
4588 args.acl_pgbase = 0;
5a006899 4589
de040bec 4590 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4591 __func__, buf, buflen, npages, args.acl_len);
4592 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4593 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4594 if (ret)
4595 goto out_free;
bf118a34 4596
1f1ea6c2
TM		 4597 /* Handle the case where the passed-in buffer is too short */
4598 if (res.acl_flags & NFS4_ACL_TRUNC) {
4599 /* Did the user only issue a request for the acl length? */
4600 if (buf == NULL)
4601 goto out_ok;
e50a1c2e 4602 ret = -ERANGE;
1f1ea6c2 4603 goto out_free;
e50a1c2e 4604 }
1f1ea6c2 4605 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4606 if (buf) {
4607 if (res.acl_len > buflen) {
4608 ret = -ERANGE;
4609 goto out_free;
4610 }
1f1ea6c2 4611 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4612 }
1f1ea6c2
TM		 4613out_ok:
4614 ret = res.acl_len;
e50a1c2e 4615out_free:
bf118a34
AA		 4616 for (i = 0; i < npages; i++)
4617 if (pages[i])
4618 __free_page(pages[i]);
331818f1
TM		 4619 if (res.acl_scratch)
4620 __free_page(res.acl_scratch);
aa1870af
BF		 4621 return ret;
4622}
4623
16b4289c
TM		 4624static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4625{
4626 struct nfs4_exception exception = { };
4627 ssize_t ret;
4628 do {
4629 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4630 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4631 if (ret >= 0)
4632 break;
4633 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4634 } while (exception.retry);
4635 return ret;
4636}
4637
e50a1c2e
BF		 4638static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4639{
4640 struct nfs_server *server = NFS_SERVER(inode);
4641 int ret;
4642
4643 if (!nfs4_server_supports_acls(server))
4644 return -EOPNOTSUPP;
4645 ret = nfs_revalidate_inode(server, inode);
4646 if (ret < 0)
4647 return ret;
08a22b39
AK		 4648 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4649 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4650 ret = nfs4_read_cached_acl(inode, buf, buflen);
4651 if (ret != -ENOENT)
bf118a34
AA		 4652 /* -ENOENT is returned if there is no ACL or if there is an ACL
4653 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4654 return ret;
4655 return nfs4_get_acl_uncached(inode, buf, buflen);
4656}
4657
16b4289c 4658static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4659{
4660 struct nfs_server *server = NFS_SERVER(inode);
4661 struct page *pages[NFS4ACL_MAXPAGES];
4662 struct nfs_setaclargs arg = {
4663 .fh = NFS_FH(inode),
4664 .acl_pages = pages,
4665 .acl_len = buflen,
4666 };
73c403a9 4667 struct nfs_setaclres res;
4b580ee3
BF		 4668 struct rpc_message msg = {
4669 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4670 .rpc_argp = &arg,
73c403a9 4671 .rpc_resp = &res,
4b580ee3 4672 };
21f498c2 4673 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4674 int ret, i;
4b580ee3
BF		 4675
4676 if (!nfs4_server_supports_acls(server))
4677 return -EOPNOTSUPP;
21f498c2
TM		 4678 if (npages > ARRAY_SIZE(pages))
4679 return -ERANGE;
e9e3d724
NH		 4680 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4681 if (i < 0)
4682 return i;
57ec14c5 4683 nfs4_inode_return_delegation(inode);
7c513058 4684 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4685
4686 /*
4687 * Free each page after tx, so the only ref left is
4688 * held by the network stack
4689 */
4690 for (; i > 0; i--)
4691 put_page(pages[i-1]);
4692
08a22b39
AK		 4693 /*
4694 * Acl update can result in inode attribute update.
4695 * so mark the attribute cache invalid.
4696 */
4697 spin_lock(&inode->i_lock);
4698 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4699 spin_unlock(&inode->i_lock);
f41f7418
TM		 4700 nfs_access_zap_cache(inode);
4701 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4702 return ret;
4703}
4704
16b4289c
TM		 4705static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4706{
4707 struct nfs4_exception exception = { };
4708 int err;
4709 do {
c1578b76
TM		 4710 err = __nfs4_proc_set_acl(inode, buf, buflen);
4711 trace_nfs4_set_acl(inode, err);
4712 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4713 &exception);
4714 } while (exception.retry);
4715 return err;
4716}
4717
aa9c2669
DQ		 4718#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4719static int _nfs4_get_security_label(struct inode *inode, void *buf,
4720 size_t buflen)
4721{
4722 struct nfs_server *server = NFS_SERVER(inode);
4723 struct nfs_fattr fattr;
4724 struct nfs4_label label = {0, 0, buflen, buf};
4725
4726 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4727 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4728 .fh = NFS_FH(inode),
4729 .bitmask = bitmask,
4730 };
4731 struct nfs4_getattr_res res = {
4732 .fattr = &fattr,
4733 .label = &label,
4734 .server = server,
4735 };
4736 struct rpc_message msg = {
4737 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4738 .rpc_argp = &arg,
aa9c2669
DQ		 4739 .rpc_resp = &res,
4740 };
4741 int ret;
4742
4743 nfs_fattr_init(&fattr);
4744
fcb63a9b 4745 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4746 if (ret)
4747 return ret;
4748 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4749 return -ENOENT;
4750 if (buflen < label.len)
4751 return -ERANGE;
4752 return 0;
4753}
4754
4755static int nfs4_get_security_label(struct inode *inode, void *buf,
4756 size_t buflen)
4757{
4758 struct nfs4_exception exception = { };
4759 int err;
4760
4761 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4762 return -EOPNOTSUPP;
4763
4764 do {
c1578b76
TM		 4765 err = _nfs4_get_security_label(inode, buf, buflen);
4766 trace_nfs4_get_security_label(inode, err);
4767 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4768 &exception);
4769 } while (exception.retry);
4770 return err;
4771}
4772
4773static int _nfs4_do_set_security_label(struct inode *inode,
4774 struct nfs4_label *ilabel,
4775 struct nfs_fattr *fattr,
4776 struct nfs4_label *olabel)
4777{
4778
4779 struct iattr sattr = {0};
4780 struct nfs_server *server = NFS_SERVER(inode);
4781 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4782 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4783 .fh = NFS_FH(inode),
4784 .iap = &sattr,
4785 .server = server,
4786 .bitmask = bitmask,
4787 .label = ilabel,
4788 };
4789 struct nfs_setattrres res = {
4790 .fattr = fattr,
4791 .label = olabel,
4792 .server = server,
4793 };
4794 struct rpc_message msg = {
4795 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4796 .rpc_argp = &arg,
aa9c2669
DQ		 4797 .rpc_resp = &res,
4798 };
4799 int status;
4800
12207f69 4801 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4802
12207f69 4803 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4804 if (status)
4805 dprintk("%s failed: %d\n", __func__, status);
4806
4807 return status;
4808}
4809
4810static int nfs4_do_set_security_label(struct inode *inode,
4811 struct nfs4_label *ilabel,
4812 struct nfs_fattr *fattr,
4813 struct nfs4_label *olabel)
4814{
4815 struct nfs4_exception exception = { };
4816 int err;
4817
4818 do {
c1578b76
TM		 4819 err = _nfs4_do_set_security_label(inode, ilabel,
4820 fattr, olabel);
4821 trace_nfs4_set_security_label(inode, err);
4822 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4823 &exception);
4824 } while (exception.retry);
4825 return err;
4826}
4827
4828static int
4829nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4830{
4831 struct nfs4_label ilabel, *olabel = NULL;
4832 struct nfs_fattr fattr;
4833 struct rpc_cred *cred;
4834 struct inode *inode = dentry->d_inode;
4835 int status;
4836
4837 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4838 return -EOPNOTSUPP;
4839
4840 nfs_fattr_init(&fattr);
4841
4842 ilabel.pi = 0;
4843 ilabel.lfs = 0;
4844 ilabel.label = (char *)buf;
4845 ilabel.len = buflen;
4846
4847 cred = rpc_lookup_cred();
4848 if (IS_ERR(cred))
4849 return PTR_ERR(cred);
4850
4851 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4852 if (IS_ERR(olabel)) {
4853 status = -PTR_ERR(olabel);
4854 goto out;
4855 }
4856
4857 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4858 if (status == 0)
4859 nfs_setsecurity(inode, &fattr, olabel);
4860
4861 nfs4_label_free(olabel);
4862out:
4863 put_rpccred(cred);
4864 return status;
4865}
4866#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4867
4868
1da177e4 4869static int
8478eaa1
N		 4870nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4871 struct nfs4_state *state, long *timeout)
1da177e4 4872{
aa5190d0
TM		 4873 struct nfs_client *clp = server->nfs_client;
4874
4875 if (task->tk_status >= 0)
1da177e4
LT		 4876 return 0;
4877 switch(task->tk_status) {
a1d0b5ee 4878 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4879 case -NFS4ERR_ADMIN_REVOKED:
4880 case -NFS4ERR_BAD_STATEID:
4881 case -NFS4ERR_OPENMODE:
4882 if (state == NULL)
4883 break;
5d422301 4884 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4885 goto recovery_failed;
0400a6b0 4886 goto wait_on_recovery;
0ced63d1 4887 case -NFS4ERR_EXPIRED:
5d422301
TM		 4888 if (state != NULL) {
4889 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4890 goto recovery_failed;
5d422301 4891 }
1da177e4 4892 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4893 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4894 nfs4_schedule_lease_recovery(clp);
4895 goto wait_on_recovery;
519ae255
CL		 4896 case -NFS4ERR_MOVED:
4897 if (nfs4_schedule_migration_recovery(server) < 0)
4898 goto recovery_failed;
4899 goto wait_on_recovery;
8ef2f8d4
CL		 4900 case -NFS4ERR_LEASE_MOVED:
4901 nfs4_schedule_lease_moved_recovery(clp);
4902 goto wait_on_recovery;
4745e315
AA		 4903#if defined(CONFIG_NFS_V4_1)
4904 case -NFS4ERR_BADSESSION:
4905 case -NFS4ERR_BADSLOT:
4906 case -NFS4ERR_BAD_HIGH_SLOT:
4907 case -NFS4ERR_DEADSESSION:
4908 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4909 case -NFS4ERR_SEQ_FALSE_RETRY:
4910 case -NFS4ERR_SEQ_MISORDERED:
4911 dprintk("%s ERROR %d, Reset session\n", __func__,
4912 task->tk_status);
9f594791 4913 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4914 goto wait_on_recovery;
4745e315 4915#endif /* CONFIG_NFS_V4_1 */
1da177e4 4916 case -NFS4ERR_DELAY:
aa5190d0 4917 nfs_inc_server_stats(server, NFSIOS_DELAY);
8478eaa1
N		 4918 rpc_delay(task, nfs4_update_delay(timeout));
4919 goto restart_call;
006ea73e 4920 case -NFS4ERR_GRACE:
1da177e4 4921 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4922 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4923 case -NFS4ERR_OLD_STATEID:
f1478c13 4924 goto restart_call;
1da177e4
LT		 4925 }
4926 task->tk_status = nfs4_map_errors(task->tk_status);
4927 return 0;
9f51a78e 4928recovery_failed:
5d422301
TM		 4929 task->tk_status = -EIO;
4930 return 0;
0400a6b0 4931wait_on_recovery:
a2c0b9e2 4932 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4933 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4934 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4935 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4936 goto recovery_failed;
f1478c13 4937restart_call:
a2c0b9e2
TM		 4938 task->tk_status = 0;
4939 return -EAGAIN;
1da177e4
LT		 4940}
4941
f092075d
CL		 4942static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4943 nfs4_verifier *bootverf)
cd93710e
CL		 4944{
4945 __be32 verf[2];
4946
2c820d9a
CL		 4947 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4948 /* An impossible timestamp guarantees this value
4949 * will never match a generated boot time. */
4950 verf[0] = 0;
17f26b12 4951 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4952 } else {
f092075d 4953 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4954 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4955 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4956 }
cd93710e
CL		 4957 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4958}
4959
e984a55a 4960static unsigned int
ceb3a16c 4961nfs4_init_nonuniform_client_string(struct nfs_client *clp,
e984a55a
CL		 4962 char *buf, size_t len)
4963{
4964 unsigned int result;
4965
ceb3a16c
TM		 4966 if (clp->cl_owner_id != NULL)
4967 return strlcpy(buf, clp->cl_owner_id, len);
4968
e984a55a
CL		 4969 rcu_read_lock();
4970 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4971 clp->cl_ipaddr,
4972 rpc_peeraddr2str(clp->cl_rpcclient,
4973 RPC_DISPLAY_ADDR),
4974 rpc_peeraddr2str(clp->cl_rpcclient,
4975 RPC_DISPLAY_PROTO));
4976 rcu_read_unlock();
ceb3a16c 4977 clp->cl_owner_id = kstrdup(buf, GFP_KERNEL);
e984a55a
CL		 4978 return result;
4979}
4980
4981static unsigned int
ceb3a16c 4982nfs4_init_uniform_client_string(struct nfs_client *clp,
e984a55a
CL		 4983 char *buf, size_t len)
4984{
55b59293 4985 const char *nodename = clp->cl_rpcclient->cl_nodename;
ceb3a16c
TM		 4986 unsigned int result;
4987
4988 if (clp->cl_owner_id != NULL)
4989 return strlcpy(buf, clp->cl_owner_id, len);
6f2ea7f2
CL		 4990
4991 if (nfs4_client_id_uniquifier[0] != '\0')
ceb3a16c 4992 result = scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
55b59293
TM		 4993 clp->rpc_ops->version,
4994 clp->cl_minorversion,
4995 nfs4_client_id_uniquifier,
4996 nodename);
ceb3a16c
TM		 4997 else
4998 result = scnprintf(buf, len, "Linux NFSv%u.%u %s",
e984a55a 4999 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 5000 nodename);
ceb3a16c
TM		 5001 clp->cl_owner_id = kstrdup(buf, GFP_KERNEL);
5002 return result;
e984a55a
CL		 5003}
5004
706cb8db
CL		 5005/*
5006 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5007 * services. Advertise one based on the address family of the
5008 * clientaddr.
5009 */
5010static unsigned int
5011nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5012{
5013 if (strchr(clp->cl_ipaddr, ':') != NULL)
5014 return scnprintf(buf, len, "tcp6");
5015 else
5016 return scnprintf(buf, len, "tcp");
5017}
5018
f11b2a1c
JL		 5019static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5020{
5021 struct nfs4_setclientid *sc = calldata;
5022
5023 if (task->tk_status == 0)
5024 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5025}
5026
5027static const struct rpc_call_ops nfs4_setclientid_ops = {
5028 .rpc_call_done = nfs4_setclientid_done,
5029};
5030
6bbb4ae8
CL		 5031/**
5032 * nfs4_proc_setclientid - Negotiate client ID
5033 * @clp: state data structure
5034 * @program: RPC program for NFSv4 callback service
5035 * @port: IP port number for NFS4 callback service
5036 * @cred: RPC credential to use for this call
5037 * @res: where to place the result
5038 *
5039 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5040 */
bb8b27e5
TM		 5041int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5042 unsigned short port, struct rpc_cred *cred,
5043 struct nfs4_setclientid_res *res)
1da177e4
LT		 5044{
5045 nfs4_verifier sc_verifier;
5046 struct nfs4_setclientid setclientid = {
5047 .sc_verifier = &sc_verifier,
5048 .sc_prog = program,
f4eecd5d 5049 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 5050 };
5051 struct rpc_message msg = {
5052 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5053 .rpc_argp = &setclientid,
bb8b27e5 5054 .rpc_resp = res,
286d7d6a 5055 .rpc_cred = cred,
1da177e4 5056 };
f11b2a1c
JL		 5057 struct rpc_task *task;
5058 struct rpc_task_setup task_setup_data = {
5059 .rpc_client = clp->cl_rpcclient,
5060 .rpc_message = &msg,
5061 .callback_ops = &nfs4_setclientid_ops,
5062 .callback_data = &setclientid,
5063 .flags = RPC_TASK_TIMEOUT,
5064 };
6bbb4ae8 5065 int status;
1da177e4 5066
de734831 5067 /* nfs_client_id4 */
f092075d 5068 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 5069 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5070 setclientid.sc_name_len =
5071 nfs4_init_uniform_client_string(clp,
5072 setclientid.sc_name,
5073 sizeof(setclientid.sc_name));
5074 else
5075 setclientid.sc_name_len =
5076 nfs4_init_nonuniform_client_string(clp,
5077 setclientid.sc_name,
5078 sizeof(setclientid.sc_name));
de734831 5079 /* cb_client4 */
706cb8db
CL		 5080 setclientid.sc_netid_len =
5081 nfs4_init_callback_netid(clp,
5082 setclientid.sc_netid,
5083 sizeof(setclientid.sc_netid));
de734831 5084 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5085 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5086 clp->cl_ipaddr, port >> 8, port & 255);
5087
6bbb4ae8
CL		 5088 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
5089 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5090 setclientid.sc_name_len, setclientid.sc_name);
f11b2a1c
JL		 5091 task = rpc_run_task(&task_setup_data);
5092 if (IS_ERR(task)) {
5093 status = PTR_ERR(task);
5094 goto out;
5095 }
5096 status = task->tk_status;
5097 if (setclientid.sc_cred) {
5098 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5099 put_rpccred(setclientid.sc_cred);
5100 }
5101 rpc_put_task(task);
5102out:
c6d01c6f 5103 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5104 dprintk("NFS reply setclientid: %d\n", status);
5105 return status;
1da177e4
LT		 5106}
5107
6bbb4ae8
CL		 5108/**
5109 * nfs4_proc_setclientid_confirm - Confirm client ID
5110 * @clp: state data structure
5111 * @res: result of a previous SETCLIENTID
5112 * @cred: RPC credential to use for this call
5113 *
5114 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5115 */
fd954ae1 5116int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5117 struct nfs4_setclientid_res *arg,
5118 struct rpc_cred *cred)
1da177e4 5119{
1da177e4
LT		 5120 struct rpc_message msg = {
5121 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5122 .rpc_argp = arg,
286d7d6a 5123 .rpc_cred = cred,
1da177e4 5124 };
1da177e4
LT		 5125 int status;
5126
6bbb4ae8
CL		 5127 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5128 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5129 clp->cl_clientid);
1bd714f2 5130 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5131 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5132 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5133 return status;
5134}
5135
fe650407
TM		 5136struct nfs4_delegreturndata {
5137 struct nfs4_delegreturnargs args;
fa178f29 5138 struct nfs4_delegreturnres res;
fe650407
TM		 5139 struct nfs_fh fh;
5140 nfs4_stateid stateid;
26e976a8 5141 unsigned long timestamp;
fa178f29 5142 struct nfs_fattr fattr;
fe650407 5143 int rpc_status;
039b756a
PT		 5144 struct inode *inode;
5145 bool roc;
5146 u32 roc_barrier;
fe650407
TM		 5147};
5148
fe650407
TM		 5149static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5150{
5151 struct nfs4_delegreturndata *data = calldata;
938e1010 5152
14516c3a
TM		 5153 if (!nfs4_sequence_done(task, &data->res.seq_res))
5154 return;
938e1010 5155
ca8acf8d 5156 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5157 switch (task->tk_status) {
79708861 5158 case 0:
fa178f29 5159 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5160 case -NFS4ERR_ADMIN_REVOKED:
5161 case -NFS4ERR_DELEG_REVOKED:
5162 case -NFS4ERR_BAD_STATEID:
5163 case -NFS4ERR_OLD_STATEID:
5164 case -NFS4ERR_STALE_STATEID:
5165 case -NFS4ERR_EXPIRED:
5166 task->tk_status = 0;
039b756a
PT		 5167 if (data->roc)
5168 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5169 break;
79708861 5170 default:
8478eaa1
N		 5171 if (nfs4_async_handle_error(task, data->res.server,
5172 NULL, NULL) == -EAGAIN) {
d00c5d43 5173 rpc_restart_call_prepare(task);
79708861
RL		 5174 return;
5175 }
5176 }
5177 data->rpc_status = task->tk_status;
fe650407
TM		 5178}
5179
5180static void nfs4_delegreturn_release(void *calldata)
5181{
039b756a 5182 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5183 struct inode *inode = data->inode;
039b756a 5184
ea7c38fe
TM		 5185 if (inode) {
5186 if (data->roc)
5187 pnfs_roc_release(inode);
5188 nfs_iput_and_deactive(inode);
5189 }
fe650407
TM		 5190 kfree(calldata);
5191}
5192
938e1010
AA		 5193static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5194{
5195 struct nfs4_delegreturndata *d_data;
5196
5197 d_data = (struct nfs4_delegreturndata *)data;
5198
039b756a
PT		 5199 if (d_data->roc &&
5200 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5201 return;
5202
d9afbd1b
TM		 5203 nfs4_setup_sequence(d_data->res.server,
5204 &d_data->args.seq_args,
5205 &d_data->res.seq_res,
5206 task);
938e1010 5207}
938e1010 5208
c8d149f3 5209static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5210 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5211 .rpc_call_done = nfs4_delegreturn_done,
5212 .rpc_release = nfs4_delegreturn_release,
5213};
5214
e6f81075 5215static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5216{
5217 struct nfs4_delegreturndata *data;
fa178f29 5218 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5219 struct rpc_task *task;
5138fde0
TM		 5220 struct rpc_message msg = {
5221 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5222 .rpc_cred = cred,
5223 };
c970aa85
TM		 5224 struct rpc_task_setup task_setup_data = {
5225 .rpc_client = server->client,
5138fde0 5226 .rpc_message = &msg,
c970aa85
TM		 5227 .callback_ops = &nfs4_delegreturn_ops,
5228 .flags = RPC_TASK_ASYNC,
5229 };
e6f81075 5230 int status = 0;
fe650407 5231
8535b2be 5232 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5233 if (data == NULL)
5234 return -ENOMEM;
a9c92d6b 5235 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5236 data->args.fhandle = &data->fh;
5237 data->args.stateid = &data->stateid;
9e907fec 5238 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5239 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5240 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5241 data->res.fattr = &data->fattr;
5242 data->res.server = server;
5138fde0 5243 nfs_fattr_init(data->res.fattr);
26e976a8 5244 data->timestamp = jiffies;
fe650407 5245 data->rpc_status = 0;
ea7c38fe
TM		 5246 data->inode = nfs_igrab_and_active(inode);
5247 if (data->inode)
5248 data->roc = nfs4_roc(inode);
fe650407 5249
c970aa85 5250 task_setup_data.callback_data = data;
1174dd1f
TM		 5251 msg.rpc_argp = &data->args;
5252 msg.rpc_resp = &data->res;
c970aa85 5253 task = rpc_run_task(&task_setup_data);
7a1218a2 5254 if (IS_ERR(task))
fe650407 5255 return PTR_ERR(task);
e6f81075
TM		 5256 if (!issync)
5257 goto out;
fe650407 5258 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5259 if (status != 0)
5260 goto out;
5261 status = data->rpc_status;
e144cbcc
TM		 5262 if (status == 0)
5263 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5264 else
5265 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5266out:
e6b3c4db 5267 rpc_put_task(task);
fe650407 5268 return status;
1da177e4
LT		 5269}
5270
e6f81075 5271int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5272{
5273 struct nfs_server *server = NFS_SERVER(inode);
5274 struct nfs4_exception exception = { };
5275 int err;
5276 do {
e6f81075 5277 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5278 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5279 switch (err) {
5280 case -NFS4ERR_STALE_STATEID:
5281 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5282 case 0:
5283 return 0;
5284 }
5285 err = nfs4_handle_exception(server, err, &exception);
5286 } while (exception.retry);
5287 return err;
5288}
5289
5290#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5291#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5292
5293/*
5294 * sleep, with exponential backoff, and retry the LOCK operation.
5295 */
5296static unsigned long
5297nfs4_set_lock_task_retry(unsigned long timeout)
5298{
416ad3c9 5299 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5300 timeout <<= 1;
5301 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5302 return NFS4_LOCK_MAXTIMEOUT;
5303 return timeout;
5304}
5305
1da177e4
LT		 5306static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5307{
5308 struct inode *inode = state->inode;
5309 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5310 struct nfs_client *clp = server->nfs_client;
911d1aaf 5311 struct nfs_lockt_args arg = {
1da177e4 5312 .fh = NFS_FH(inode),
911d1aaf 5313 .fl = request,
1da177e4 5314 };
911d1aaf
TM		 5315 struct nfs_lockt_res res = {
5316 .denied = request,
1da177e4
LT		 5317 };
5318 struct rpc_message msg = {
5319 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5320 .rpc_argp = &arg,
5321 .rpc_resp = &res,
5322 .rpc_cred = state->owner->so_cred,
5323 };
1da177e4
LT		 5324 struct nfs4_lock_state *lsp;
5325 int status;
5326
911d1aaf 5327 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5328 status = nfs4_set_lock_state(state, request);
5329 if (status != 0)
5330 goto out;
5331 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5332 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5333 arg.lock_owner.s_dev = server->s_dev;
7c513058 5334 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5335 switch (status) {
5336 case 0:
5337 request->fl_type = F_UNLCK;
5338 break;
5339 case -NFS4ERR_DENIED:
5340 status = 0;
1da177e4 5341 }
70cc6487 5342 request->fl_ops->fl_release_private(request);
a6f951dd 5343 request->fl_ops = NULL;
8d0a8a9d 5344out:
1da177e4
LT		 5345 return status;
5346}
5347
5348static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5349{
5350 struct nfs4_exception exception = { };
5351 int err;
5352
5353 do {
d1b748a5
TM		 5354 err = _nfs4_proc_getlk(state, cmd, request);
5355 trace_nfs4_get_lock(request, state, cmd, err);
5356 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5357 &exception);
5358 } while (exception.retry);
5359 return err;
5360}
5361
5362static int do_vfs_lock(struct file *file, struct file_lock *fl)
5363{
5364 int res = 0;
5365 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5366 case FL_POSIX:
5367 res = posix_lock_file_wait(file, fl);
5368 break;
5369 case FL_FLOCK:
5370 res = flock_lock_file_wait(file, fl);
5371 break;
5372 default:
5373 BUG();
5374 }
1da177e4
LT		 5375 return res;
5376}
5377
faf5f49c 5378struct nfs4_unlockdata {
911d1aaf
TM		 5379 struct nfs_locku_args arg;
5380 struct nfs_locku_res res;
faf5f49c
TM		 5381 struct nfs4_lock_state *lsp;
5382 struct nfs_open_context *ctx;
911d1aaf
TM		 5383 struct file_lock fl;
5384 const struct nfs_server *server;
26e976a8 5385 unsigned long timestamp;
faf5f49c
TM		 5386};
5387
911d1aaf
TM		 5388static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5389 struct nfs_open_context *ctx,
5390 struct nfs4_lock_state *lsp,
5391 struct nfs_seqid *seqid)
5392{
5393 struct nfs4_unlockdata *p;
5394 struct inode *inode = lsp->ls_state->inode;
5395
8535b2be 5396 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5397 if (p == NULL)
5398 return NULL;
5399 p->arg.fh = NFS_FH(inode);
5400 p->arg.fl = &p->fl;
5401 p->arg.seqid = seqid;
c1d51931 5402 p->res.seqid = seqid;
911d1aaf
TM		 5403 p->lsp = lsp;
5404 atomic_inc(&lsp->ls_count);
5405 /* Ensure we don't close file until we're done freeing locks! */
5406 p->ctx = get_nfs_open_context(ctx);
5407 memcpy(&p->fl, fl, sizeof(p->fl));
5408 p->server = NFS_SERVER(inode);
5409 return p;
5410}
5411
06f814a3 5412static void nfs4_locku_release_calldata(void *data)
faf5f49c 5413{
963d8fe5 5414 struct nfs4_unlockdata *calldata = data;
911d1aaf 5415 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5416 nfs4_put_lock_state(calldata->lsp);
5417 put_nfs_open_context(calldata->ctx);
5418 kfree(calldata);
faf5f49c
TM		 5419}
5420
963d8fe5 5421static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5422{
963d8fe5 5423 struct nfs4_unlockdata *calldata = data;
faf5f49c 5424
14516c3a
TM		 5425 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5426 return;
faf5f49c
TM		 5427 switch (task->tk_status) {
5428 case 0:
26e976a8 5429 renew_lease(calldata->server, calldata->timestamp);
c69899a1
TM		 5430 do_vfs_lock(calldata->fl.fl_file, &calldata->fl);
5431 if (nfs4_update_lock_stateid(calldata->lsp,
5432 &calldata->res.stateid))
5433 break;
9e33bed5
TM		 5434 case -NFS4ERR_BAD_STATEID:
5435 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5436 case -NFS4ERR_STALE_STATEID:
5437 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5438 if (!nfs4_stateid_match(&calldata->arg.stateid,
5439 &calldata->lsp->ls_stateid))
5440 rpc_restart_call_prepare(task);
faf5f49c
TM		 5441 break;
5442 default:
8478eaa1
N		 5443 if (nfs4_async_handle_error(task, calldata->server,
5444 NULL, NULL) == -EAGAIN)
d00c5d43 5445 rpc_restart_call_prepare(task);
faf5f49c 5446 }
2b1bc308 5447 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5448}
5449
4ce70ada 5450static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5451{
4ce70ada 5452 struct nfs4_unlockdata *calldata = data;
faf5f49c 5453
911d1aaf 5454 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5455 goto out_wait;
425c1d4e 5456 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5457 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5458 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5459 goto out_no_action;
faf5f49c 5460 }
26e976a8 5461 calldata->timestamp = jiffies;
035168ab 5462 if (nfs4_setup_sequence(calldata->server,
a893693c 5463 &calldata->arg.seq_args,
2240a9e2
TM		 5464 &calldata->res.seq_res,
5465 task) != 0)
5466 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5467 return;
5468out_no_action:
5469 task->tk_action = NULL;
5470out_wait:
5471 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5472}
5473
963d8fe5 5474static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5475 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5476 .rpc_call_done = nfs4_locku_done,
06f814a3 5477 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5478};
5479
a5d16a4d
TM		 5480static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5481 struct nfs_open_context *ctx,
5482 struct nfs4_lock_state *lsp,
5483 struct nfs_seqid *seqid)
5484{
5485 struct nfs4_unlockdata *data;
5138fde0
TM		 5486 struct rpc_message msg = {
5487 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5488 .rpc_cred = ctx->cred,
5489 };
c970aa85
TM		 5490 struct rpc_task_setup task_setup_data = {
5491 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5492 .rpc_message = &msg,
c970aa85 5493 .callback_ops = &nfs4_locku_ops,
101070ca 5494 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5495 .flags = RPC_TASK_ASYNC,
5496 };
a5d16a4d 5497
fa940720
WAA		 5498 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5499 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5500
137d6aca
FF		 5501 /* Ensure this is an unlock - when canceling a lock, the
5502 * canceled lock is passed in, and it won't be an unlock.
5503 */
5504 fl->fl_type = F_UNLCK;
5505
a5d16a4d
TM		 5506 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5507 if (data == NULL) {
5508 nfs_free_seqid(seqid);
5509 return ERR_PTR(-ENOMEM);
5510 }
5511
a9c92d6b 5512 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5513 msg.rpc_argp = &data->arg;
5514 msg.rpc_resp = &data->res;
c970aa85
TM		 5515 task_setup_data.callback_data = data;
5516 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5517}
5518
faf5f49c
TM		 5519static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5520{
65b62a29
TM		 5521 struct inode *inode = state->inode;
5522 struct nfs4_state_owner *sp = state->owner;
5523 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5524 struct nfs_seqid *seqid;
1da177e4 5525 struct nfs4_lock_state *lsp;
06f814a3 5526 struct rpc_task *task;
b4019c0e 5527 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5528 int status = 0;
536ff0f8 5529 unsigned char fl_flags = request->fl_flags;
faf5f49c 5530
8d0a8a9d 5531 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5532 /* Unlock _before_ we do the RPC call */
5533 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5534 /* Exclude nfs_delegation_claim_locks() */
5535 mutex_lock(&sp->so_delegreturn_mutex);
5536 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5537 down_read(&nfsi->rwsem);
5538 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5539 up_read(&nfsi->rwsem);
65b62a29 5540 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5541 goto out;
19e03c57
TM		 5542 }
5543 up_read(&nfsi->rwsem);
65b62a29 5544 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5545 if (status != 0)
9b073574
TM		 5546 goto out;
5547 /* Is this a delegated lock? */
8d0a8a9d 5548 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5549 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5550 goto out;
b4019c0e
TM		 5551 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5552 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5553 status = -ENOMEM;
badc76dd 5554 if (IS_ERR(seqid))
9b073574 5555 goto out;
cd3758e3 5556 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5557 status = PTR_ERR(task);
5558 if (IS_ERR(task))
9b073574 5559 goto out;
a5d16a4d 5560 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5561 rpc_put_task(task);
9b073574 5562out:
536ff0f8 5563 request->fl_flags = fl_flags;
d1b748a5 5564 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5565 return status;
5566}
5567
a5d16a4d
TM		 5568struct nfs4_lockdata {
5569 struct nfs_lock_args arg;
5570 struct nfs_lock_res res;
5571 struct nfs4_lock_state *lsp;
5572 struct nfs_open_context *ctx;
5573 struct file_lock fl;
26e976a8 5574 unsigned long timestamp;
a5d16a4d
TM		 5575 int rpc_status;
5576 int cancelled;
66179efe 5577 struct nfs_server *server;
a5d16a4d
TM		 5578};
5579
5580static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5581 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5582 gfp_t gfp_mask)
1da177e4 5583{
a5d16a4d
TM		 5584 struct nfs4_lockdata *p;
5585 struct inode *inode = lsp->ls_state->inode;
1da177e4 5586 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5587 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5588
8535b2be 5589 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5590 if (p == NULL)
5591 return NULL;
5592
5593 p->arg.fh = NFS_FH(inode);
5594 p->arg.fl = &p->fl;
8535b2be 5595 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5596 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5597 goto out_free;
b4019c0e
TM		 5598 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5599 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5600 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5601 goto out_free_seqid;
7539bbab 5602 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5603 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5604 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5605 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5606 p->lsp = lsp;
66179efe 5607 p->server = server;
a5d16a4d
TM		 5608 atomic_inc(&lsp->ls_count);
5609 p->ctx = get_nfs_open_context(ctx);
5610 memcpy(&p->fl, fl, sizeof(p->fl));
5611 return p;
2f74c0a0
TM		 5612out_free_seqid:
5613 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5614out_free:
5615 kfree(p);
5616 return NULL;
5617}
5618
5619static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5620{
5621 struct nfs4_lockdata *data = calldata;
5622 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5623
3110ff80 5624 dprintk("%s: begin!\n", __func__);
2f74c0a0 5625 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5626 goto out_wait;
a5d16a4d 5627 /* Do we need to do an open_to_lock_owner? */
6b447539 5628 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5629 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5630 goto out_release_lock_seqid;
8fe72bac 5631 }
425c1d4e
TM		 5632 nfs4_stateid_copy(&data->arg.open_stateid,
5633 &state->open_stateid);
a5d16a4d 5634 data->arg.new_lock_owner = 1;
c1d51931 5635 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5636 } else {
2f74c0a0 5637 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5638 nfs4_stateid_copy(&data->arg.lock_stateid,
5639 &data->lsp->ls_stateid);
5640 }
5d422301
TM		 5641 if (!nfs4_valid_open_stateid(state)) {
5642 data->rpc_status = -EBADF;
5643 task->tk_action = NULL;
5644 goto out_release_open_seqid;
5645 }
26e976a8 5646 data->timestamp = jiffies;
035168ab
TM		 5647 if (nfs4_setup_sequence(data->server,
5648 &data->arg.seq_args,
2240a9e2 5649 &data->res.seq_res,
d9afbd1b 5650 task) == 0)
66179efe 5651 return;
5d422301 5652out_release_open_seqid:
2240a9e2
TM		 5653 nfs_release_seqid(data->arg.open_seqid);
5654out_release_lock_seqid:
5655 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5656out_wait:
5657 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5658 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5659}
5660
a5d16a4d
TM		 5661static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5662{
5663 struct nfs4_lockdata *data = calldata;
39071e6f 5664 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5665
3110ff80 5666 dprintk("%s: begin!\n", __func__);
a5d16a4d 5667
14516c3a
TM		 5668 if (!nfs4_sequence_done(task, &data->res.seq_res))
5669 return;
66179efe 5670
a5d16a4d 5671 data->rpc_status = task->tk_status;
425c1d4e
TM		 5672 switch (task->tk_status) {
5673 case 0:
39071e6f
TM		 5674 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode),
5675 data->timestamp);
c69899a1
TM		 5676 if (data->arg.new_lock) {
5677 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
5678 if (do_vfs_lock(data->fl.fl_file, &data->fl) < 0) {
5679 rpc_restart_call_prepare(task);
5680 break;
5681 }
5682 }
39071e6f
TM		 5683 if (data->arg.new_lock_owner != 0) {
5684 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5685 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5686 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5687 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5688 rpc_restart_call_prepare(task);
425c1d4e
TM		 5689 break;
5690 case -NFS4ERR_BAD_STATEID:
5691 case -NFS4ERR_OLD_STATEID:
5692 case -NFS4ERR_STALE_STATEID:
5693 case -NFS4ERR_EXPIRED:
5694 if (data->arg.new_lock_owner != 0) {
5695 if (!nfs4_stateid_match(&data->arg.open_stateid,
5696 &lsp->ls_state->open_stateid))
5697 rpc_restart_call_prepare(task);
5698 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5699 &lsp->ls_stateid))
5700 rpc_restart_call_prepare(task);
a5d16a4d 5701 }
3110ff80 5702 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5703}
5704
5705static void nfs4_lock_release(void *calldata)
5706{
5707 struct nfs4_lockdata *data = calldata;
5708
3110ff80 5709 dprintk("%s: begin!\n", __func__);
2f74c0a0 5710 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5711 if (data->cancelled != 0) {
5712 struct rpc_task *task;
5713 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5714 data->arg.lock_seqid);
5715 if (!IS_ERR(task))
bf294b41 5716 rpc_put_task_async(task);
3110ff80 5717 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5718 } else
5719 nfs_free_seqid(data->arg.lock_seqid);
5720 nfs4_put_lock_state(data->lsp);
5721 put_nfs_open_context(data->ctx);
5722 kfree(data);
3110ff80 5723 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5724}
5725
5726static const struct rpc_call_ops nfs4_lock_ops = {
5727 .rpc_call_prepare = nfs4_lock_prepare,
5728 .rpc_call_done = nfs4_lock_done,
5729 .rpc_release = nfs4_lock_release,
5730};
5731
2bee72a6
TM		 5732static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5733{
2bee72a6
TM		 5734 switch (error) {
5735 case -NFS4ERR_ADMIN_REVOKED:
5736 case -NFS4ERR_BAD_STATEID:
ecac799a 5737 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5738 if (new_lock_owner != 0 ||
795a88c9 5739 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5740 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5741 break;
5742 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5743 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5744 case -NFS4ERR_EXPIRED:
5745 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5746 };
5747}
5748
afe6c27c 5749static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5750{
5751 struct nfs4_lockdata *data;
5752 struct rpc_task *task;
5138fde0
TM		 5753 struct rpc_message msg = {
5754 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5755 .rpc_cred = state->owner->so_cred,
5756 };
c970aa85
TM		 5757 struct rpc_task_setup task_setup_data = {
5758 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5759 .rpc_message = &msg,
c970aa85 5760 .callback_ops = &nfs4_lock_ops,
101070ca 5761 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5762 .flags = RPC_TASK_ASYNC,
5763 };
a5d16a4d
TM		 5764 int ret;
5765
3110ff80 5766 dprintk("%s: begin!\n", __func__);
cd3758e3 5767 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5768 fl->fl_u.nfs4_fl.owner,
5769 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5770 if (data == NULL)
5771 return -ENOMEM;
5772 if (IS_SETLKW(cmd))
5773 data->arg.block = 1;
a9c92d6b 5774 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5775 msg.rpc_argp = &data->arg;
5776 msg.rpc_resp = &data->res;
c970aa85 5777 task_setup_data.callback_data = data;
8fe72bac
TM		 5778 if (recovery_type > NFS_LOCK_NEW) {
5779 if (recovery_type == NFS_LOCK_RECLAIM)
5780 data->arg.reclaim = NFS_LOCK_RECLAIM;
5781 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 5782 } else
5783 data->arg.new_lock = 1;
c970aa85 5784 task = rpc_run_task(&task_setup_data);
7a1218a2 5785 if (IS_ERR(task))
a5d16a4d 5786 return PTR_ERR(task);
a5d16a4d
TM		 5787 ret = nfs4_wait_for_completion_rpc_task(task);
5788 if (ret == 0) {
5789 ret = data->rpc_status;
2bee72a6
TM		 5790 if (ret)
5791 nfs4_handle_setlk_error(data->server, data->lsp,
5792 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5793 } else
5794 data->cancelled = 1;
e6b3c4db 5795 rpc_put_task(task);
3110ff80 5796 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5797 return ret;
1da177e4
LT		 5798}
5799
5800static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5801{
202b50dc 5802 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5803 struct nfs4_exception exception = {
5804 .inode = state->inode,
5805 };
202b50dc
TM		 5806 int err;
5807
5808 do {
42a2d13e
TM		 5809 /* Cache the lock if possible... */
5810 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5811 return 0;
afe6c27c 5812 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5813 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5814 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5815 break;
5816 nfs4_handle_exception(server, err, &exception);
5817 } while (exception.retry);
5818 return err;
1da177e4
LT		 5819}
5820
5821static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5822{
202b50dc 5823 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5824 struct nfs4_exception exception = {
5825 .inode = state->inode,
5826 };
202b50dc
TM		 5827 int err;
5828
6bfc93ef
TM		 5829 err = nfs4_set_lock_state(state, request);
5830 if (err != 0)
5831 return err;
f6de7a39 5832 if (!recover_lost_locks) {
ef1820f9
N		 5833 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5834 return 0;
5835 }
202b50dc 5836 do {
42a2d13e
TM		 5837 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5838 return 0;
afe6c27c 5839 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5840 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5841 switch (err) {
5842 default:
5843 goto out;
5844 case -NFS4ERR_GRACE:
5845 case -NFS4ERR_DELAY:
5846 nfs4_handle_exception(server, err, &exception);
5847 err = 0;
5848 }
202b50dc 5849 } while (exception.retry);
a9ed2e25 5850out:
202b50dc 5851 return err;
1da177e4
LT		 5852}
5853
f062eb6c 5854#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5855/**
5856 * nfs41_check_expired_locks - possibly free a lock stateid
5857 *
5858 * @state: NFSv4 state for an inode
5859 *
5860 * Returns NFS_OK if recovery for this stateid is now finished.
5861 * Otherwise a negative NFS4ERR value is returned.
5862 */
b01dd1d8 5863static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5864{
eb64cf96 5865 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5866 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5867 struct nfs_server *server = NFS_SERVER(state->inode);
5868
b01dd1d8 5869 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5870 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5871 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5872
5873 status = nfs41_test_stateid(server,
5874 &lsp->ls_stateid,
5875 cred);
08cb47fa 5876 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5877 if (status != NFS_OK) {
3e60ffdd
CL		 5878 /* Free the stateid unless the server
5879 * informs us the stateid is unrecognized. */
89af2739
CL		 5880 if (status != -NFS4ERR_BAD_STATEID)
5881 nfs41_free_stateid(server,
ab7cb0df
TM		 5882 &lsp->ls_stateid,
5883 cred);
795a88c9 5884 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5885 ret = status;
5886 }
5887 }
5888 };
5889
5890 return ret;
5891}
5892
5893static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5894{
5895 int status = NFS_OK;
5896
5897 if (test_bit(LK_STATE_IN_USE, &state->flags))
5898 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5899 if (status != NFS_OK)
5900 status = nfs4_lock_expired(state, request);
5901 return status;
f062eb6c
BS		 5902}
5903#endif
5904
1da177e4
LT		 5905static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5906{
19e03c57 5907 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5908 unsigned char fl_flags = request->fl_flags;
8e469ebd 5909 int status = -ENOLCK;
1da177e4 5910
8e469ebd
TM		 5911 if ((fl_flags & FL_POSIX) &&
5912 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5913 goto out;
6bfc93ef 5914 /* Is this a delegated open? */
6bfc93ef
TM		 5915 status = nfs4_set_lock_state(state, request);
5916 if (status != 0)
5917 goto out;
01c3b861
TM		 5918 request->fl_flags |= FL_ACCESS;
5919 status = do_vfs_lock(request->fl_file, request);
5920 if (status < 0)
5921 goto out;
19e03c57 5922 down_read(&nfsi->rwsem);
01c3b861 5923 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5924 /* Yes: cache locks! */
01c3b861 5925 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5926 request->fl_flags = fl_flags & ~FL_SLEEP;
5927 status = do_vfs_lock(request->fl_file, request);
c69899a1 5928 up_read(&nfsi->rwsem);
9a99af49 5929 goto out;
9a99af49 5930 }
19e03c57 5931 up_read(&nfsi->rwsem);
c69899a1 5932 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 5933out:
5934 request->fl_flags = fl_flags;
1da177e4
LT		 5935 return status;
5936}
5937
5938static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5939{
a1d0b5ee
TM		 5940 struct nfs4_exception exception = {
5941 .state = state,
05ffe24f 5942 .inode = state->inode,
a1d0b5ee 5943 };
1da177e4
LT		 5944 int err;
5945
5946 do {
965b5d67 5947 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5948 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5949 if (err == -NFS4ERR_DENIED)
5950 err = -EAGAIN;
1da177e4 5951 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5952 err, &exception);
1da177e4
LT		 5953 } while (exception.retry);
5954 return err;
5955}
5956
5957static int
5958nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5959{
5960 struct nfs_open_context *ctx;
5961 struct nfs4_state *state;
5962 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5963 int status;
5964
5965 /* verify open state */
cd3758e3 5966 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5967 state = ctx->state;
5968
5969 if (request->fl_start < 0 || request->fl_end < 0)
5970 return -EINVAL;
5971
d953126a
TM		 5972 if (IS_GETLK(cmd)) {
5973 if (state != NULL)
5974 return nfs4_proc_getlk(state, F_GETLK, request);
5975 return 0;
5976 }
1da177e4
LT		 5977
5978 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5979 return -EINVAL;
5980
d953126a
TM		 5981 if (request->fl_type == F_UNLCK) {
5982 if (state != NULL)
5983 return nfs4_proc_unlck(state, cmd, request);
5984 return 0;
5985 }
1da177e4 5986
d953126a
TM		 5987 if (state == NULL)
5988 return -ENOLCK;
55725513
TM		 5989 /*
5990 * Don't rely on the VFS having checked the file open mode,
5991 * since it won't do this for flock() locks.
5992 */
f44106e2 5993 switch (request->fl_type) {
55725513
TM		 5994 case F_RDLCK:
5995 if (!(filp->f_mode & FMODE_READ))
5996 return -EBADF;
5997 break;
5998 case F_WRLCK:
5999 if (!(filp->f_mode & FMODE_WRITE))
6000 return -EBADF;
6001 }
6002
1da177e4
LT		 6003 do {
6004 status = nfs4_proc_setlk(state, cmd, request);
6005 if ((status != -EAGAIN) || IS_SETLK(cmd))
6006 break;
6007 timeout = nfs4_set_lock_task_retry(timeout);
6008 status = -ERESTARTSYS;
6009 if (signalled())
6010 break;
6011 } while(status < 0);
1da177e4
LT		 6012 return status;
6013}
6014
db4f2e63 6015int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6016{
6017 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6018 int err;
6019
6020 err = nfs4_set_lock_state(state, fl);
6021 if (err != 0)
db4f2e63 6022 return err;
4a706fa0 6023 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6024 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6025}
6b3b5496 6026
cf470c3e
TM		 6027struct nfs_release_lockowner_data {
6028 struct nfs4_lock_state *lsp;
5ae67c4f 6029 struct nfs_server *server;
cf470c3e 6030 struct nfs_release_lockowner_args args;
b7e63a10 6031 struct nfs_release_lockowner_res res;
60ea6812 6032 unsigned long timestamp;
cf470c3e
TM		 6033};
6034
fbd4bfd1
CL		 6035static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6036{
6037 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6038 struct nfs_server *server = data->server;
cb04ad2a
PT		 6039 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6040 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6041 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6042 data->timestamp = jiffies;
fbd4bfd1
CL		 6043}
6044
6045static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6046{
6047 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6048 struct nfs_server *server = data->server;
6049
b7e63a10 6050 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6051
6052 switch (task->tk_status) {
6053 case 0:
6054 renew_lease(server, data->timestamp);
6055 break;
6056 case -NFS4ERR_STALE_CLIENTID:
6057 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6058 nfs4_schedule_lease_recovery(server->nfs_client);
6059 break;
60ea6812
CL		 6060 case -NFS4ERR_LEASE_MOVED:
6061 case -NFS4ERR_DELAY:
8478eaa1
N		 6062 if (nfs4_async_handle_error(task, server,
6063 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6064 rpc_restart_call_prepare(task);
6065 }
fbd4bfd1
CL		 6066}
6067
d3c7b7cc
TM		 6068static void nfs4_release_lockowner_release(void *calldata)
6069{
cf470c3e 6070 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6071 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6072 kfree(calldata);
6073}
6074
17280175 6075static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6076 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6077 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6078 .rpc_release = nfs4_release_lockowner_release,
6079};
6080
f1cdae87
JL		 6081static void
6082nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6083{
cf470c3e 6084 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6085 struct rpc_message msg = {
6086 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6087 };
6088
6089 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6090 return;
fbd4bfd1 6091
cf470c3e
TM		 6092 data = kmalloc(sizeof(*data), GFP_NOFS);
6093 if (!data)
f1cdae87 6094 return;
cf470c3e 6095 data->lsp = lsp;
5ae67c4f 6096 data->server = server;
cf470c3e
TM		 6097 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6098 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6099 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6100
cf470c3e 6101 msg.rpc_argp = &data->args;
b7e63a10
TM		 6102 msg.rpc_resp = &data->res;
6103 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6104 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6105}
6106
aa1870af
BF		 6107#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6108
64c2ce8b
AK		 6109static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6110 const void *buf, size_t buflen,
6111 int flags, int type)
6b3b5496 6112{
64c2ce8b
AK		 6113 if (strcmp(key, "") != 0)
6114 return -EINVAL;
4b580ee3 6115
64c2ce8b 6116 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6117}
6118
64c2ce8b
AK		 6119static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6120 void *buf, size_t buflen, int type)
6b3b5496 6121{
64c2ce8b
AK		 6122 if (strcmp(key, "") != 0)
6123 return -EINVAL;
aa1870af 6124
64c2ce8b 6125 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6126}
6127
64c2ce8b
AK		 6128static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6129 size_t list_len, const char *name,
6130 size_t name_len, int type)
6b3b5496 6131{
64c2ce8b 6132 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6133
096455a2
BF		 6134 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
6135 return 0;
64c2ce8b
AK		 6136
6137 if (list && len <= list_len)
6138 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6139 return len;
6b3b5496
BF		 6140}
6141
c9bccef6
DQ		 6142#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6143static inline int nfs4_server_supports_labels(struct nfs_server *server)
6144{
6145 return server->caps & NFS_CAP_SECURITY_LABEL;
6146}
6147
6148static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6149 const void *buf, size_t buflen,
6150 int flags, int type)
6151{
6152 if (security_ismaclabel(key))
6153 return nfs4_set_security_label(dentry, buf, buflen);
6154
6155 return -EOPNOTSUPP;
6156}
6157
6158static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6159 void *buf, size_t buflen, int type)
6160{
6161 if (security_ismaclabel(key))
6162 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
6163 return -EOPNOTSUPP;
6164}
6165
6166static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6167 size_t list_len, const char *name,
6168 size_t name_len, int type)
6169{
6170 size_t len = 0;
6171
6172 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
6173 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
6174 if (list && len <= list_len)
6175 security_inode_listsecurity(dentry->d_inode, list, len);
6176 }
6177 return len;
6178}
6179
6180static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6181 .prefix = XATTR_SECURITY_PREFIX,
6182 .list = nfs4_xattr_list_nfs4_label,
6183 .get = nfs4_xattr_get_nfs4_label,
6184 .set = nfs4_xattr_set_nfs4_label,
6185};
6186#endif
6187
6188
533eb461
AA		 6189/*
6190 * nfs_fhget will use either the mounted_on_fileid or the fileid
6191 */
69aaaae1
TM		 6192static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6193{
533eb461
AA		 6194 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6195 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6196 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6197 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6198 return;
6199
6200 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6201 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6202 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6203 fattr->nlink = 2;
6204}
6205
f05d147f
BS		 6206static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6207 const struct qstr *name,
6208 struct nfs4_fs_locations *fs_locations,
6209 struct page *page)
683b57b4
TM		 6210{
6211 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6212 u32 bitmask[3] = {
361e624f 6213 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6214 };
6215 struct nfs4_fs_locations_arg args = {
6216 .dir_fh = NFS_FH(dir),
c228fd3a 6217 .name = name,
683b57b4
TM		 6218 .page = page,
6219 .bitmask = bitmask,
6220 };
22958463
BH		 6221 struct nfs4_fs_locations_res res = {
6222 .fs_locations = fs_locations,
6223 };
683b57b4
TM		 6224 struct rpc_message msg = {
6225 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6226 .rpc_argp = &args,
22958463 6227 .rpc_resp = &res,
683b57b4
TM		 6228 };
6229 int status;
6230
3110ff80 6231 dprintk("%s: start\n", __func__);
533eb461
AA		 6232
6233 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6234 * is not supported */
6235 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6236 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6237 else
6238 bitmask[0] |= FATTR4_WORD0_FILEID;
6239
c228fd3a 6240 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6241 fs_locations->server = server;
830b8e33 6242 fs_locations->nlocations = 0;
f05d147f 6243 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6244 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6245 return status;
6246}
6247
f05d147f
BS		 6248int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6249 const struct qstr *name,
6250 struct nfs4_fs_locations *fs_locations,
6251 struct page *page)
db0a9593
BS		 6252{
6253 struct nfs4_exception exception = { };
6254 int err;
6255 do {
078ea3df
TM		 6256 err = _nfs4_proc_fs_locations(client, dir, name,
6257 fs_locations, page);
6258 trace_nfs4_get_fs_locations(dir, name, err);
6259 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6260 &exception);
6261 } while (exception.retry);
6262 return err;
6263}
6264
b03d735b
CL		 6265/*
6266 * This operation also signals the server that this client is
6267 * performing migration recovery. The server can stop returning
6268 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6269 * appended to this compound to identify the client ID which is
6270 * performing recovery.
6271 */
6272static int _nfs40_proc_get_locations(struct inode *inode,
6273 struct nfs4_fs_locations *locations,
6274 struct page *page, struct rpc_cred *cred)
6275{
6276 struct nfs_server *server = NFS_SERVER(inode);
6277 struct rpc_clnt *clnt = server->client;
6278 u32 bitmask[2] = {
6279 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6280 };
6281 struct nfs4_fs_locations_arg args = {
6282 .clientid = server->nfs_client->cl_clientid,
6283 .fh = NFS_FH(inode),
6284 .page = page,
6285 .bitmask = bitmask,
6286 .migration = 1, /* skip LOOKUP */
6287 .renew = 1, /* append RENEW */
6288 };
6289 struct nfs4_fs_locations_res res = {
6290 .fs_locations = locations,
6291 .migration = 1,
6292 .renew = 1,
6293 };
6294 struct rpc_message msg = {
6295 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6296 .rpc_argp = &args,
6297 .rpc_resp = &res,
6298 .rpc_cred = cred,
6299 };
6300 unsigned long now = jiffies;
6301 int status;
6302
6303 nfs_fattr_init(&locations->fattr);
6304 locations->server = server;
6305 locations->nlocations = 0;
6306
6307 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6308 nfs4_set_sequence_privileged(&args.seq_args);
6309 status = nfs4_call_sync_sequence(clnt, server, &msg,
6310 &args.seq_args, &res.seq_res);
6311 if (status)
6312 return status;
6313
6314 renew_lease(server, now);
6315 return 0;
6316}
6317
6318#ifdef CONFIG_NFS_V4_1
6319
6320/*
6321 * This operation also signals the server that this client is
6322 * performing migration recovery. The server can stop asserting
6323 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6324 * performing this operation is identified in the SEQUENCE
6325 * operation in this compound.
6326 *
6327 * When the client supports GETATTR(fs_locations_info), it can
6328 * be plumbed in here.
6329 */
6330static int _nfs41_proc_get_locations(struct inode *inode,
6331 struct nfs4_fs_locations *locations,
6332 struct page *page, struct rpc_cred *cred)
6333{
6334 struct nfs_server *server = NFS_SERVER(inode);
6335 struct rpc_clnt *clnt = server->client;
6336 u32 bitmask[2] = {
6337 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6338 };
6339 struct nfs4_fs_locations_arg args = {
6340 .fh = NFS_FH(inode),
6341 .page = page,
6342 .bitmask = bitmask,
6343 .migration = 1, /* skip LOOKUP */
6344 };
6345 struct nfs4_fs_locations_res res = {
6346 .fs_locations = locations,
6347 .migration = 1,
6348 };
6349 struct rpc_message msg = {
6350 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6351 .rpc_argp = &args,
6352 .rpc_resp = &res,
6353 .rpc_cred = cred,
6354 };
6355 int status;
6356
6357 nfs_fattr_init(&locations->fattr);
6358 locations->server = server;
6359 locations->nlocations = 0;
6360
6361 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6362 nfs4_set_sequence_privileged(&args.seq_args);
6363 status = nfs4_call_sync_sequence(clnt, server, &msg,
6364 &args.seq_args, &res.seq_res);
6365 if (status == NFS4_OK &&
6366 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6367 status = -NFS4ERR_LEASE_MOVED;
6368 return status;
6369}
6370
6371#endif /* CONFIG_NFS_V4_1 */
6372
6373/**
6374 * nfs4_proc_get_locations - discover locations for a migrated FSID
6375 * @inode: inode on FSID that is migrating
6376 * @locations: result of query
6377 * @page: buffer
6378 * @cred: credential to use for this operation
6379 *
6380 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6381 * operation failed, or a negative errno if a local error occurred.
6382 *
6383 * On success, "locations" is filled in, but if the server has
6384 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6385 * asserted.
6386 *
6387 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6388 * from this client that require migration recovery.
6389 */
6390int nfs4_proc_get_locations(struct inode *inode,
6391 struct nfs4_fs_locations *locations,
6392 struct page *page, struct rpc_cred *cred)
6393{
6394 struct nfs_server *server = NFS_SERVER(inode);
6395 struct nfs_client *clp = server->nfs_client;
6396 const struct nfs4_mig_recovery_ops *ops =
6397 clp->cl_mvops->mig_recovery_ops;
6398 struct nfs4_exception exception = { };
6399 int status;
6400
6401 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6402 (unsigned long long)server->fsid.major,
6403 (unsigned long long)server->fsid.minor,
6404 clp->cl_hostname);
6405 nfs_display_fhandle(NFS_FH(inode), __func__);
6406
6407 do {
6408 status = ops->get_locations(inode, locations, page, cred);
6409 if (status != -NFS4ERR_DELAY)
6410 break;
6411 nfs4_handle_exception(server, status, &exception);
6412 } while (exception.retry);
6413 return status;
6414}
6415
44c99933
CL		 6416/*
6417 * This operation also signals the server that this client is
6418 * performing "lease moved" recovery. The server can stop
6419 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6420 * is appended to this compound to identify the client ID which is
6421 * performing recovery.
6422 */
6423static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6424{
6425 struct nfs_server *server = NFS_SERVER(inode);
6426 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6427 struct rpc_clnt *clnt = server->client;
6428 struct nfs4_fsid_present_arg args = {
6429 .fh = NFS_FH(inode),
6430 .clientid = clp->cl_clientid,
6431 .renew = 1, /* append RENEW */
6432 };
6433 struct nfs4_fsid_present_res res = {
6434 .renew = 1,
6435 };
6436 struct rpc_message msg = {
6437 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6438 .rpc_argp = &args,
6439 .rpc_resp = &res,
6440 .rpc_cred = cred,
6441 };
6442 unsigned long now = jiffies;
6443 int status;
6444
6445 res.fh = nfs_alloc_fhandle();
6446 if (res.fh == NULL)
6447 return -ENOMEM;
6448
6449 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6450 nfs4_set_sequence_privileged(&args.seq_args);
6451 status = nfs4_call_sync_sequence(clnt, server, &msg,
6452 &args.seq_args, &res.seq_res);
6453 nfs_free_fhandle(res.fh);
6454 if (status)
6455 return status;
6456
6457 do_renew_lease(clp, now);
6458 return 0;
6459}
6460
6461#ifdef CONFIG_NFS_V4_1
6462
6463/*
6464 * This operation also signals the server that this client is
6465 * performing "lease moved" recovery. The server can stop asserting
6466 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6467 * this operation is identified in the SEQUENCE operation in this
6468 * compound.
6469 */
6470static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6471{
6472 struct nfs_server *server = NFS_SERVER(inode);
6473 struct rpc_clnt *clnt = server->client;
6474 struct nfs4_fsid_present_arg args = {
6475 .fh = NFS_FH(inode),
6476 };
6477 struct nfs4_fsid_present_res res = {
6478 };
6479 struct rpc_message msg = {
6480 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6481 .rpc_argp = &args,
6482 .rpc_resp = &res,
6483 .rpc_cred = cred,
6484 };
6485 int status;
6486
6487 res.fh = nfs_alloc_fhandle();
6488 if (res.fh == NULL)
6489 return -ENOMEM;
6490
6491 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6492 nfs4_set_sequence_privileged(&args.seq_args);
6493 status = nfs4_call_sync_sequence(clnt, server, &msg,
6494 &args.seq_args, &res.seq_res);
6495 nfs_free_fhandle(res.fh);
6496 if (status == NFS4_OK &&
6497 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6498 status = -NFS4ERR_LEASE_MOVED;
6499 return status;
6500}
6501
6502#endif /* CONFIG_NFS_V4_1 */
6503
6504/**
6505 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6506 * @inode: inode on FSID to check
6507 * @cred: credential to use for this operation
6508 *
6509 * Server indicates whether the FSID is present, moved, or not
6510 * recognized. This operation is necessary to clear a LEASE_MOVED
6511 * condition for this client ID.
6512 *
6513 * Returns NFS4_OK if the FSID is present on this server,
6514 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6515 * NFS4ERR code if some error occurred on the server, or a
6516 * negative errno if a local failure occurred.
6517 */
6518int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6519{
6520 struct nfs_server *server = NFS_SERVER(inode);
6521 struct nfs_client *clp = server->nfs_client;
6522 const struct nfs4_mig_recovery_ops *ops =
6523 clp->cl_mvops->mig_recovery_ops;
6524 struct nfs4_exception exception = { };
6525 int status;
6526
6527 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6528 (unsigned long long)server->fsid.major,
6529 (unsigned long long)server->fsid.minor,
6530 clp->cl_hostname);
6531 nfs_display_fhandle(NFS_FH(inode), __func__);
6532
6533 do {
6534 status = ops->fsid_present(inode, cred);
6535 if (status != -NFS4ERR_DELAY)
6536 break;
6537 nfs4_handle_exception(server, status, &exception);
6538 } while (exception.retry);
6539 return status;
6540}
6541
5ec16a85 6542/**
a5250def
WAA		 6543 * If 'use_integrity' is true and the state managment nfs_client
6544 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6545 * and the machine credential as per RFC3530bis and RFC5661 Security
6546 * Considerations sections. Otherwise, just use the user cred with the
6547 * filesystem's rpc_client.
5ec16a85 6548 */
a5250def 6549static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6550{
6551 int status;
6552 struct nfs4_secinfo_arg args = {
6553 .dir_fh = NFS_FH(dir),
6554 .name = name,
6555 };
6556 struct nfs4_secinfo_res res = {
6557 .flavors = flavors,
6558 };
6559 struct rpc_message msg = {
6560 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6561 .rpc_argp = &args,
6562 .rpc_resp = &res,
6563 };
a5250def 6564 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6565 struct rpc_cred *cred = NULL;
a5250def
WAA		 6566
6567 if (use_integrity) {
6568 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6569 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6570 msg.rpc_cred = cred;
a5250def 6571 }
5a5ea0d4
BS		 6572
6573 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6574
6575 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6576 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6577
a5250def
WAA		 6578 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6579 &res.seq_res, 0);
5a5ea0d4 6580 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6581
7cb852df
WAA		 6582 if (cred)
6583 put_rpccred(cred);
a5250def 6584
5a5ea0d4
BS		 6585 return status;
6586}
6587
72de53ec
BS		 6588int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6589 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6590{
6591 struct nfs4_exception exception = { };
6592 int err;
6593 do {
a5250def
WAA		 6594 err = -NFS4ERR_WRONGSEC;
6595
6596 /* try to use integrity protection with machine cred */
6597 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6598 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6599
6600 /*
6601 * if unable to use integrity protection, or SECINFO with
6602 * integrity protection returns NFS4ERR_WRONGSEC (which is
6603 * disallowed by spec, but exists in deployed servers) use
6604 * the current filesystem's rpc_client and the user cred.
6605 */
6606 if (err == -NFS4ERR_WRONGSEC)
6607 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6608
078ea3df
TM		 6609 trace_nfs4_secinfo(dir, name, err);
6610 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6611 &exception);
6612 } while (exception.retry);
6613 return err;
6614}
6615
557134a3 6616#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6617/*
6618 * Check the exchange flags returned by the server for invalid flags, having
6619 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6620 * DS flags set.
6621 */
6622static int nfs4_check_cl_exchange_flags(u32 flags)
6623{
6624 if (flags & ~EXCHGID4_FLAG_MASK_R)
6625 goto out_inval;
6626 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6627 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6628 goto out_inval;
6629 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6630 goto out_inval;
6631 return NFS_OK;
6632out_inval:
6633 return -NFS4ERR_INVAL;
6634}
6635
78fe0f41 6636static bool
79d4e1f0
CL		 6637nfs41_same_server_scope(struct nfs41_server_scope *a,
6638 struct nfs41_server_scope *b)
78fe0f41
WAA		 6639{
6640 if (a->server_scope_sz == b->server_scope_sz &&
6641 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6642 return true;
6643
6644 return false;
6645}
6646
7c44f1ae
WAA		 6647/*
6648 * nfs4_proc_bind_conn_to_session()
6649 *
6650 * The 4.1 client currently uses the same TCP connection for the
6651 * fore and backchannel.
6652 */
2cf047c9 6653int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6654{
6655 int status;
71a097c6
TM		 6656 struct nfs41_bind_conn_to_session_args args = {
6657 .client = clp,
6658 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6659 };
7c44f1ae
WAA		 6660 struct nfs41_bind_conn_to_session_res res;
6661 struct rpc_message msg = {
6662 .rpc_proc =
6663 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 6664 .rpc_argp = &args,
7c44f1ae 6665 .rpc_resp = &res,
2cf047c9 6666 .rpc_cred = cred,
7c44f1ae
WAA		 6667 };
6668
6669 dprintk("--> %s\n", __func__);
7c44f1ae 6670
71a097c6
TM		 6671 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6672 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6673 args.dir = NFS4_CDFC4_FORE;
7c44f1ae
WAA		 6674
6675 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6676 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 6677 if (status == 0) {
71a097c6 6678 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 6679 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6680 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6681 status = -EIO;
71a097c6 6682 goto out;
7c44f1ae 6683 }
71a097c6 6684 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 6685 dprintk("NFS: %s: Unexpected direction from server\n",
6686 __func__);
6687 status = -EIO;
71a097c6 6688 goto out;
7c44f1ae 6689 }
71a097c6 6690 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 6691 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6692 __func__);
6693 status = -EIO;
71a097c6 6694 goto out;
7c44f1ae
WAA		 6695 }
6696 }
7c44f1ae
WAA		 6697out:
6698 dprintk("<-- %s status= %d\n", __func__, status);
6699 return status;
6700}
6701
99fe60d0 6702/*
fa940720
WAA		 6703 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6704 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6705 */
6706static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6707 .how = SP4_MACH_CRED,
6708 .enforce.u.words = {
6709 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6710 1 << (OP_EXCHANGE_ID - 32) |
6711 1 << (OP_CREATE_SESSION - 32) |
6712 1 << (OP_DESTROY_SESSION - 32) |
6713 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6714 },
6715 .allow.u.words = {
6716 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6717 1 << (OP_LOCKU) |
6718 1 << (OP_COMMIT),
8b5bee2e 6719 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6720 1 << (OP_SECINFO_NO_NAME - 32) |
6721 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6722 1 << (OP_FREE_STATEID - 32) |
6723 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6724 }
6725};
6726
6727/*
6728 * Select the state protection mode for client `clp' given the server results
6729 * from exchange_id in `sp'.
99fe60d0 6730 *
2031cd1a
WAA		 6731 * Returns 0 on success, negative errno otherwise.
6732 */
6733static int nfs4_sp4_select_mode(struct nfs_client *clp,
6734 struct nfs41_state_protection *sp)
6735{
6736 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6737 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6738 1 << (OP_EXCHANGE_ID - 32) |
6739 1 << (OP_CREATE_SESSION - 32) |
6740 1 << (OP_DESTROY_SESSION - 32) |
6741 1 << (OP_DESTROY_CLIENTID - 32)
6742 };
6743 unsigned int i;
6744
6745 if (sp->how == SP4_MACH_CRED) {
6746 /* Print state protect result */
6747 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6748 for (i = 0; i <= LAST_NFS4_OP; i++) {
6749 if (test_bit(i, sp->enforce.u.longs))
6750 dfprintk(MOUNT, " enforce op %d\n", i);
6751 if (test_bit(i, sp->allow.u.longs))
6752 dfprintk(MOUNT, " allow op %d\n", i);
6753 }
6754
6755 /* make sure nothing is on enforce list that isn't supported */
6756 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6757 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6758 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6759 return -EINVAL;
6760 }
6761 }
6762
6763 /*
6764 * Minimal mode - state operations are allowed to use machine
6765 * credential. Note this already happens by default, so the
6766 * client doesn't have to do anything more than the negotiation.
6767 *
6768 * NOTE: we don't care if EXCHANGE_ID is in the list -
6769 * we're already using the machine cred for exchange_id
6770 * and will never use a different cred.
6771 */
6772 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6773 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6774 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6775 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6776 dfprintk(MOUNT, "sp4_mach_cred:\n");
6777 dfprintk(MOUNT, " minimal mode enabled\n");
6778 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6779 } else {
6780 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6781 return -EINVAL;
6782 }
fa940720
WAA		 6783
6784 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6785 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6786 dfprintk(MOUNT, " cleanup mode enabled\n");
6787 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6788 }
8b5bee2e
WAA		 6789
6790 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6791 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6792 dfprintk(MOUNT, " secinfo mode enabled\n");
6793 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6794 }
3787d506
WAA		 6795
6796 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6797 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6798 dfprintk(MOUNT, " stateid mode enabled\n");
6799 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6800 }
8c21c62c
WAA		 6801
6802 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6803 dfprintk(MOUNT, " write mode enabled\n");
6804 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6805 }
6806
6807 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6808 dfprintk(MOUNT, " commit mode enabled\n");
6809 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6810 }
2031cd1a
WAA		 6811 }
6812
6813 return 0;
6814}
6815
6816/*
6817 * _nfs4_proc_exchange_id()
6bbb4ae8 6818 *
2031cd1a 6819 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6820 */
2031cd1a
WAA		 6821static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6822 u32 sp4_how)
99fe60d0
BH		 6823{
6824 nfs4_verifier verifier;
6825 struct nfs41_exchange_id_args args = {
cd93710e 6826 .verifier = &verifier,
99fe60d0 6827 .client = clp,
cd3fadec 6828#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6829 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6830 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6831 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6832#else
6833 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6834 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6835#endif
99fe60d0
BH		 6836 };
6837 struct nfs41_exchange_id_res res = {
32b01310 6838 0
99fe60d0
BH		 6839 };
6840 int status;
6841 struct rpc_message msg = {
6842 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6843 .rpc_argp = &args,
6844 .rpc_resp = &res,
6845 .rpc_cred = cred,
6846 };
99fe60d0 6847
f092075d 6848 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6849 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6850 sizeof(args.id));
6bbb4ae8
CL		 6851 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6852 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6853 args.id_len, args.id);
99fe60d0 6854
acdeb69d 6855 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6856 GFP_NOFS);
acdeb69d 6857 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6858 status = -ENOMEM;
6859 goto out;
6860 }
78fe0f41 6861
79d4e1f0 6862 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6863 GFP_NOFS);
177313f1 6864 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6865 status = -ENOMEM;
acdeb69d 6866 goto out_server_owner;
abe9a6d5 6867 }
78fe0f41 6868
bbafffd2 6869 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6870 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6871 status = -ENOMEM;
6872 goto out_server_scope;
6873 }
6874
2031cd1a
WAA		 6875 switch (sp4_how) {
6876 case SP4_NONE:
6877 args.state_protect.how = SP4_NONE;
6878 break;
6879
6880 case SP4_MACH_CRED:
6881 args.state_protect = nfs4_sp4_mach_cred_request;
6882 break;
6883
6884 default:
6885 /* unsupported! */
6886 WARN_ON_ONCE(1);
6887 status = -EINVAL;
6888 goto out_server_scope;
6889 }
6890
1bd714f2 6891 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6892 trace_nfs4_exchange_id(clp, status);
177313f1 6893 if (status == 0)
32b01310 6894 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6895
2031cd1a
WAA		 6896 if (status == 0)
6897 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6898
acdeb69d 6899 if (status == 0) {
32b01310 6900 clp->cl_clientid = res.clientid;
e11259f9
TM		 6901 clp->cl_exchange_flags = res.flags;
6902 /* Client ID is not confirmed */
6903 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
6904 clear_bit(NFS4_SESSION_ESTABLISHED,
6905 &clp->cl_session->session_state);
32b01310 6906 clp->cl_seqid = res.seqid;
e11259f9 6907 }
32b01310 6908
acdeb69d
CL		 6909 kfree(clp->cl_serverowner);
6910 clp->cl_serverowner = res.server_owner;
6911 res.server_owner = NULL;
78fe0f41 6912
7d2ed9ac 6913 /* use the most recent implementation id */
59155546
CL		 6914 kfree(clp->cl_implid);
6915 clp->cl_implid = res.impl_id;
7d2ed9ac 6916
177313f1 6917 if (clp->cl_serverscope != NULL &&
79d4e1f0 6918 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6919 res.server_scope)) {
6920 dprintk("%s: server_scope mismatch detected\n",
6921 __func__);
6922 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6923 kfree(clp->cl_serverscope);
6924 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6925 }
6926
177313f1 6927 if (clp->cl_serverscope == NULL) {
79d4e1f0 6928 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6929 goto out;
6930 }
32b01310
TM		 6931 } else
6932 kfree(res.impl_id);
7d2ed9ac 6933
acdeb69d
CL		 6934out_server_owner:
6935 kfree(res.server_owner);
7d2ed9ac 6936out_server_scope:
abe9a6d5
WAA		 6937 kfree(res.server_scope);
6938out:
177313f1 6939 if (clp->cl_implid != NULL)
6bbb4ae8 6940 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6941 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6942 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6943 clp->cl_implid->date.seconds,
6944 clp->cl_implid->date.nseconds);
6bbb4ae8 6945 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6946 return status;
6947}
6948
2031cd1a
WAA		 6949/*
6950 * nfs4_proc_exchange_id()
6951 *
6952 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6953 *
6954 * Since the clientid has expired, all compounds using sessions
6955 * associated with the stale clientid will be returning
6956 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6957 * be in some phase of session reset.
6958 *
6959 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6960 */
6961int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6962{
6963 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6964 int status;
6965
6966 /* try SP4_MACH_CRED if krb5i/p */
6967 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6968 authflavor == RPC_AUTH_GSS_KRB5P) {
6969 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6970 if (!status)
6971 return 0;
6972 }
6973
6974 /* try SP4_NONE */
6975 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6976}
6977
66245539
TM		 6978static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6979 struct rpc_cred *cred)
6980{
6981 struct rpc_message msg = {
6982 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6983 .rpc_argp = clp,
6984 .rpc_cred = cred,
6985 };
6986 int status;
6987
6988 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6989 trace_nfs4_destroy_clientid(clp, status);
66245539 6990 if (status)
02c67525 6991 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6992 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6993 return status;
6994}
6995
6996static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6997 struct rpc_cred *cred)
6998{
6999 unsigned int loop;
7000 int ret;
7001
7002 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7003 ret = _nfs4_proc_destroy_clientid(clp, cred);
7004 switch (ret) {
7005 case -NFS4ERR_DELAY:
7006 case -NFS4ERR_CLIENTID_BUSY:
7007 ssleep(1);
7008 break;
7009 default:
7010 return ret;
7011 }
7012 }
7013 return 0;
7014}
7015
7016int nfs4_destroy_clientid(struct nfs_client *clp)
7017{
7018 struct rpc_cred *cred;
7019 int ret = 0;
7020
7021 if (clp->cl_mvops->minor_version < 1)
7022 goto out;
7023 if (clp->cl_exchange_flags == 0)
7024 goto out;
05f4c350
CL		 7025 if (clp->cl_preserve_clid)
7026 goto out;
73d8bde5 7027 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7028 ret = nfs4_proc_destroy_clientid(clp, cred);
7029 if (cred)
7030 put_rpccred(cred);
7031 switch (ret) {
7032 case 0:
7033 case -NFS4ERR_STALE_CLIENTID:
7034 clp->cl_exchange_flags = 0;
7035 }
7036out:
7037 return ret;
7038}
7039
2050f0cc
AA		 7040struct nfs4_get_lease_time_data {
7041 struct nfs4_get_lease_time_args *args;
7042 struct nfs4_get_lease_time_res *res;
7043 struct nfs_client *clp;
7044};
7045
7046static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7047 void *calldata)
7048{
2050f0cc
AA		 7049 struct nfs4_get_lease_time_data *data =
7050 (struct nfs4_get_lease_time_data *)calldata;
7051
7052 dprintk("--> %s\n", __func__);
7053 /* just setup sequence, do not trigger session recovery
7054 since we're invoked within one */
d9afbd1b
TM		 7055 nfs41_setup_sequence(data->clp->cl_session,
7056 &data->args->la_seq_args,
7057 &data->res->lr_seq_res,
7058 task);
2050f0cc
AA		 7059 dprintk("<-- %s\n", __func__);
7060}
7061
7062/*
7063 * Called from nfs4_state_manager thread for session setup, so don't recover
7064 * from sequence operation or clientid errors.
7065 */
7066static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7067{
7068 struct nfs4_get_lease_time_data *data =
7069 (struct nfs4_get_lease_time_data *)calldata;
7070
7071 dprintk("--> %s\n", __func__);
14516c3a
TM		 7072 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7073 return;
2050f0cc
AA		 7074 switch (task->tk_status) {
7075 case -NFS4ERR_DELAY:
7076 case -NFS4ERR_GRACE:
7077 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7078 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7079 task->tk_status = 0;
a8a4ae3a
AA		 7080 /* fall through */
7081 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7082 rpc_restart_call_prepare(task);
2050f0cc
AA		 7083 return;
7084 }
2050f0cc
AA		 7085 dprintk("<-- %s\n", __func__);
7086}
7087
17280175 7088static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7089 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7090 .rpc_call_done = nfs4_get_lease_time_done,
7091};
7092
7093int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7094{
7095 struct rpc_task *task;
7096 struct nfs4_get_lease_time_args args;
7097 struct nfs4_get_lease_time_res res = {
7098 .lr_fsinfo = fsinfo,
7099 };
7100 struct nfs4_get_lease_time_data data = {
7101 .args = &args,
7102 .res = &res,
7103 .clp = clp,
7104 };
7105 struct rpc_message msg = {
7106 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7107 .rpc_argp = &args,
7108 .rpc_resp = &res,
7109 };
7110 struct rpc_task_setup task_setup = {
7111 .rpc_client = clp->cl_rpcclient,
7112 .rpc_message = &msg,
7113 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7114 .callback_data = &data,
7115 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7116 };
7117 int status;
7118
a9c92d6b 7119 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7120 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7121 dprintk("--> %s\n", __func__);
7122 task = rpc_run_task(&task_setup);
7123
7124 if (IS_ERR(task))
7125 status = PTR_ERR(task);
7126 else {
7127 status = task->tk_status;
7128 rpc_put_task(task);
7129 }
7130 dprintk("<-- %s return %d\n", __func__, status);
7131
7132 return status;
7133}
7134
fc931582
AA		 7135/*
7136 * Initialize the values to be used by the client in CREATE_SESSION
7137 * If nfs4_init_session set the fore channel request and response sizes,
7138 * use them.
7139 *
7140 * Set the back channel max_resp_sz_cached to zero to force the client to
7141 * always set csa_cachethis to FALSE because the current implementation
7142 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7143 */
7144static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7145{
18aad3d5
AA		 7146 unsigned int max_rqst_sz, max_resp_sz;
7147
7148 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7149 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7150
fc931582 7151 /* Fore channel attributes */
18aad3d5
AA		 7152 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7153 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7154 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7155 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7156
7157 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7158 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7159 __func__,
7160 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7161 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7162
7163 /* Back channel attributes */
fc931582
AA		 7164 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7165 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7166 args->bc_attrs.max_resp_sz_cached = 0;
7167 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7168 args->bc_attrs.max_reqs = 1;
7169
7170 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7171 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7172 __func__,
7173 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7174 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7175 args->bc_attrs.max_reqs);
7176}
7177
79969dd1
TM		 7178static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7179 struct nfs41_create_session_res *res)
8d35301d 7180{
43c2e885 7181 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7182 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7183
43c2e885
BF		 7184 if (rcvd->max_resp_sz > sent->max_resp_sz)
7185 return -EINVAL;
7186 /*
7187 * Our requested max_ops is the minimum we need; we're not
7188 * prepared to break up compounds into smaller pieces than that.
7189 * So, no point even trying to continue if the server won't
7190 * cooperate:
7191 */
7192 if (rcvd->max_ops < sent->max_ops)
7193 return -EINVAL;
7194 if (rcvd->max_reqs == 0)
7195 return -EINVAL;
b4b9a0c1
VG		 7196 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7197 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7198 return 0;
8d35301d
AA		 7199}
7200
79969dd1
TM		 7201static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7202 struct nfs41_create_session_res *res)
43c2e885
BF		 7203{
7204 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7205 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7206
b1c0df5f
TM		 7207 if (!(res->flags & SESSION4_BACK_CHAN))
7208 goto out;
43c2e885
BF		 7209 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7210 return -EINVAL;
7211 if (rcvd->max_resp_sz < sent->max_resp_sz)
7212 return -EINVAL;
7213 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7214 return -EINVAL;
7215 /* These would render the backchannel useless: */
b4b9a0c1 7216 if (rcvd->max_ops != sent->max_ops)
43c2e885 7217 return -EINVAL;
b4b9a0c1 7218 if (rcvd->max_reqs != sent->max_reqs)
43c2e885 7219 return -EINVAL;
b1c0df5f 7220out:
43c2e885
BF		 7221 return 0;
7222}
8d35301d 7223
8d35301d 7224static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7225 struct nfs41_create_session_res *res)
8d35301d 7226{
43c2e885 7227 int ret;
8d35301d 7228
79969dd1 7229 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7230 if (ret)
7231 return ret;
79969dd1
TM		 7232 return nfs4_verify_back_channel_attrs(args, res);
7233}
7234
7235static void nfs4_update_session(struct nfs4_session *session,
7236 struct nfs41_create_session_res *res)
7237{
7238 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7239 /* Mark client id and session as being confirmed */
7240 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7241 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7242 session->flags = res->flags;
7243 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7244 if (res->flags & SESSION4_BACK_CHAN)
7245 memcpy(&session->bc_attrs, &res->bc_attrs,
7246 sizeof(session->bc_attrs));
8d35301d
AA		 7247}
7248
848f5bda
TM		 7249static int _nfs4_proc_create_session(struct nfs_client *clp,
7250 struct rpc_cred *cred)
fc931582
AA		 7251{
7252 struct nfs4_session *session = clp->cl_session;
7253 struct nfs41_create_session_args args = {
7254 .client = clp,
79969dd1
TM		 7255 .clientid = clp->cl_clientid,
7256 .seqid = clp->cl_seqid,
fc931582
AA		 7257 .cb_program = NFS4_CALLBACK,
7258 };
79969dd1
TM		 7259 struct nfs41_create_session_res res;
7260
fc931582
AA		 7261 struct rpc_message msg = {
7262 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7263 .rpc_argp = &args,
7264 .rpc_resp = &res,
848f5bda 7265 .rpc_cred = cred,
fc931582
AA		 7266 };
7267 int status;
7268
7269 nfs4_init_channel_attrs(&args);
0f91421e 7270 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7271
1bd714f2 7272 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7273 trace_nfs4_create_session(clp, status);
fc931582 7274
43095d39 7275 if (!status) {
8d35301d 7276 /* Verify the session's negotiated channel_attrs values */
79969dd1 7277 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7278 /* Increment the clientid slot sequence id */
79969dd1
TM		 7279 if (clp->cl_seqid == res.seqid)
7280 clp->cl_seqid++;
7281 if (status)
7282 goto out;
7283 nfs4_update_session(session, &res);
fc931582 7284 }
79969dd1 7285out:
fc931582
AA		 7286 return status;
7287}
7288
7289/*
7290 * Issues a CREATE_SESSION operation to the server.
7291 * It is the responsibility of the caller to verify the session is
7292 * expired before calling this routine.
7293 */
848f5bda 7294int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7295{
7296 int status;
7297 unsigned *ptr;
fc931582
AA		 7298 struct nfs4_session *session = clp->cl_session;
7299
7300 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7301
848f5bda 7302 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7303 if (status)
7304 goto out;
7305
aacd5537
AA		 7306 /* Init or reset the session slot tables */
7307 status = nfs4_setup_session_slot_tables(session);
7308 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7309 if (status)
7310 goto out;
7311
7312 ptr = (unsigned *)&session->sess_id.data[0];
7313 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7314 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7315out:
7316 dprintk("<-- %s\n", __func__);
7317 return status;
7318}
7319
0f3e66c6
AA		 7320/*
7321 * Issue the over-the-wire RPC DESTROY_SESSION.
7322 * The caller must serialize access to this routine.
7323 */
848f5bda
TM		 7324int nfs4_proc_destroy_session(struct nfs4_session *session,
7325 struct rpc_cred *cred)
0f3e66c6 7326{
848f5bda
TM		 7327 struct rpc_message msg = {
7328 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7329 .rpc_argp = session,
7330 .rpc_cred = cred,
7331 };
0f3e66c6 7332 int status = 0;
0f3e66c6
AA		 7333
7334 dprintk("--> nfs4_proc_destroy_session\n");
7335
7336 /* session is still being setup */
e11259f9
TM		 7337 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7338 return 0;
0f3e66c6 7339
1bd714f2 7340 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7341 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7342
7343 if (status)
08106ac7 7344 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7345 "Session has been destroyed regardless...\n", status);
7346
7347 dprintk("<-- nfs4_proc_destroy_session\n");
7348 return status;
7349}
7350
fc01cea9
AA		 7351/*
7352 * Renew the cl_session lease.
7353 */
d5f8d3fe
TM		 7354struct nfs4_sequence_data {
7355 struct nfs_client *clp;
7356 struct nfs4_sequence_args args;
7357 struct nfs4_sequence_res res;
7358};
7359
dc96aef9
AB		 7360static void nfs41_sequence_release(void *data)
7361{
d5f8d3fe
TM		 7362 struct nfs4_sequence_data *calldata = data;
7363 struct nfs_client *clp = calldata->clp;
dc96aef9 7364
7135840f
AB		 7365 if (atomic_read(&clp->cl_count) > 1)
7366 nfs4_schedule_state_renewal(clp);
7367 nfs_put_client(clp);
d5f8d3fe 7368 kfree(calldata);
dc96aef9
AB		 7369}
7370
aa5190d0
TM		 7371static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7372{
7373 switch(task->tk_status) {
7374 case -NFS4ERR_DELAY:
aa5190d0
TM		 7375 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7376 return -EAGAIN;
7377 default:
0400a6b0 7378 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7379 }
7380 return 0;
7381}
7382
dc96aef9 7383static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7384{
d5f8d3fe
TM		 7385 struct nfs4_sequence_data *calldata = data;
7386 struct nfs_client *clp = calldata->clp;
fc01cea9 7387
14516c3a
TM		 7388 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7389 return;
fc01cea9 7390
c6d01c6f 7391 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7392 if (task->tk_status < 0) {
7393 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7394 if (atomic_read(&clp->cl_count) == 1)
7395 goto out;
fc01cea9 7396
aa5190d0
TM		 7397 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7398 rpc_restart_call_prepare(task);
fc01cea9
AA		 7399 return;
7400 }
7401 }
fc01cea9 7402 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7403out:
fc01cea9
AA		 7404 dprintk("<-- %s\n", __func__);
7405}
7406
7407static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7408{
d5f8d3fe
TM		 7409 struct nfs4_sequence_data *calldata = data;
7410 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7411 struct nfs4_sequence_args *args;
7412 struct nfs4_sequence_res *res;
7413
fc01cea9
AA		 7414 args = task->tk_msg.rpc_argp;
7415 res = task->tk_msg.rpc_resp;
7416
d9afbd1b 7417 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7418}
7419
7420static const struct rpc_call_ops nfs41_sequence_ops = {
7421 .rpc_call_done = nfs41_sequence_call_done,
7422 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7423 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7424};
7425
8fe72bac
TM		 7426static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7427 struct rpc_cred *cred,
7428 bool is_privileged)
fc01cea9 7429{
d5f8d3fe 7430 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7431 struct rpc_message msg = {
7432 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7433 .rpc_cred = cred,
7434 };
71ac6da9
TM		 7435 struct rpc_task_setup task_setup_data = {
7436 .rpc_client = clp->cl_rpcclient,
7437 .rpc_message = &msg,
8fe72bac 7438 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7439 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7440 };
fc01cea9 7441
7135840f 7442 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7443 return ERR_PTR(-EIO);
dfb4f309 7444 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7445 if (calldata == NULL) {
7135840f 7446 nfs_put_client(clp);
71ac6da9 7447 return ERR_PTR(-ENOMEM);
fc01cea9 7448 }
a9c92d6b 7449 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7450 if (is_privileged)
7451 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7452 msg.rpc_argp = &calldata->args;
7453 msg.rpc_resp = &calldata->res;
7454 calldata->clp = clp;
71ac6da9 7455 task_setup_data.callback_data = calldata;
fc01cea9 7456
71ac6da9
TM		 7457 return rpc_run_task(&task_setup_data);
7458}
7459
2f60ea6b 7460static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7461{
7462 struct rpc_task *task;
7463 int ret = 0;
7464
2f60ea6b 7465 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7466 return -EAGAIN;
8fe72bac 7467 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7468 if (IS_ERR(task))
7469 ret = PTR_ERR(task);
7470 else
bf294b41 7471 rpc_put_task_async(task);
71ac6da9
TM		 7472 dprintk("<-- %s status=%d\n", __func__, ret);
7473 return ret;
7474}
7475
7476static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7477{
7478 struct rpc_task *task;
7479 int ret;
7480
8fe72bac 7481 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7482 if (IS_ERR(task)) {
7483 ret = PTR_ERR(task);
7484 goto out;
7485 }
7486 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7487 if (!ret) {
7488 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7489
7490 if (task->tk_status == 0)
7491 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7492 ret = task->tk_status;
b4410c2f 7493 }
71ac6da9
TM		 7494 rpc_put_task(task);
7495out:
7496 dprintk("<-- %s status=%d\n", __func__, ret);
7497 return ret;
fc01cea9
AA		 7498}
7499
fce5c838
RL		 7500struct nfs4_reclaim_complete_data {
7501 struct nfs_client *clp;
7502 struct nfs41_reclaim_complete_args arg;
7503 struct nfs41_reclaim_complete_res res;
7504};
7505
7506static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7507{
7508 struct nfs4_reclaim_complete_data *calldata = data;
7509
d9afbd1b
TM		 7510 nfs41_setup_sequence(calldata->clp->cl_session,
7511 &calldata->arg.seq_args,
7512 &calldata->res.seq_res,
7513 task);
fce5c838
RL		 7514}
7515
aa5190d0
TM		 7516static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7517{
7518 switch(task->tk_status) {
7519 case 0:
7520 case -NFS4ERR_COMPLETE_ALREADY:
7521 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7522 break;
7523 case -NFS4ERR_DELAY:
aa5190d0 7524 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7525 /* fall through */
7526 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7527 return -EAGAIN;
7528 default:
0400a6b0 7529 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7530 }
7531 return 0;
7532}
7533
fce5c838
RL		 7534static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7535{
7536 struct nfs4_reclaim_complete_data *calldata = data;
7537 struct nfs_client *clp = calldata->clp;
7538 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7539
7540 dprintk("--> %s\n", __func__);
14516c3a
TM		 7541 if (!nfs41_sequence_done(task, res))
7542 return;
fce5c838 7543
c6d01c6f 7544 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7545 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7546 rpc_restart_call_prepare(task);
7547 return;
7548 }
fce5c838
RL		 7549 dprintk("<-- %s\n", __func__);
7550}
7551
7552static void nfs4_free_reclaim_complete_data(void *data)
7553{
7554 struct nfs4_reclaim_complete_data *calldata = data;
7555
7556 kfree(calldata);
7557}
7558
7559static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7560 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7561 .rpc_call_done = nfs4_reclaim_complete_done,
7562 .rpc_release = nfs4_free_reclaim_complete_data,
7563};
7564
7565/*
7566 * Issue a global reclaim complete.
7567 */
965e9c23
TM		 7568static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7569 struct rpc_cred *cred)
fce5c838
RL		 7570{
7571 struct nfs4_reclaim_complete_data *calldata;
7572 struct rpc_task *task;
7573 struct rpc_message msg = {
7574 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7575 .rpc_cred = cred,
fce5c838
RL		 7576 };
7577 struct rpc_task_setup task_setup_data = {
7578 .rpc_client = clp->cl_rpcclient,
7579 .rpc_message = &msg,
7580 .callback_ops = &nfs4_reclaim_complete_call_ops,
7581 .flags = RPC_TASK_ASYNC,
7582 };
7583 int status = -ENOMEM;
7584
7585 dprintk("--> %s\n", __func__);
8535b2be 7586 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7587 if (calldata == NULL)
7588 goto out;
7589 calldata->clp = clp;
7590 calldata->arg.one_fs = 0;
fce5c838 7591
a9c92d6b 7592 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7593 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7594 msg.rpc_argp = &calldata->arg;
7595 msg.rpc_resp = &calldata->res;
7596 task_setup_data.callback_data = calldata;
7597 task = rpc_run_task(&task_setup_data);
acf82b85 7598 if (IS_ERR(task)) {
fce5c838 7599 status = PTR_ERR(task);
acf82b85
DC		 7600 goto out;
7601 }
c34c32ea
AA		 7602 status = nfs4_wait_for_completion_rpc_task(task);
7603 if (status == 0)
7604 status = task->tk_status;
fce5c838 7605 rpc_put_task(task);
acf82b85 7606 return 0;
fce5c838
RL		 7607out:
7608 dprintk("<-- %s status=%d\n", __func__, status);
7609 return status;
7610}
b1f69b75
AA		 7611
7612static void
7613nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7614{
7615 struct nfs4_layoutget *lgp = calldata;
c31663d4 7616 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7617 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7618
7619 dprintk("--> %s\n", __func__);
c31663d4
FI		 7620 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7621 * right now covering the LAYOUTGET we are about to send.
7622 * However, that is not so catastrophic, and there seems
7623 * to be no way to prevent it completely.
7624 */
6ba7db34 7625 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7626 &lgp->res.seq_res, task))
b1f69b75 7627 return;
cf7d63f1
FI		 7628 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7629 NFS_I(lgp->args.inode)->layout,
ce6ab4f2 7630 &lgp->args.range,
cf7d63f1
FI		 7631 lgp->args.ctx->state)) {
7632 rpc_exit(task, NFS4_OK);
cf7d63f1 7633 }
b1f69b75
AA		 7634}
7635
7636static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7637{
7638 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7639 struct inode *inode = lgp->args.inode;
7640 struct nfs_server *server = NFS_SERVER(inode);
7641 struct pnfs_layout_hdr *lo;
7642 struct nfs4_state *state = NULL;
ed7e5423 7643 unsigned long timeo, now, giveup;
b1f69b75 7644
ed7e5423 7645 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7646
6ba7db34 7647 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7648 goto out;
b1f69b75
AA		 7649
7650 switch (task->tk_status) {
7651 case 0:
ee314c2a 7652 goto out;
ed7e5423
BH		 7653 /*
7654 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7655 * (or clients) writing to the same RAID stripe
7656 */
b1f69b75 7657 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7658 /*
7659 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7660 * existing layout before getting a new one).
7661 */
b1f69b75 7662 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7663 timeo = rpc_get_timeout(task->tk_client);
7664 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7665 now = jiffies;
7666 if (time_after(giveup, now)) {
7667 unsigned long delay;
7668
7669 /* Delay for:
7670 * - Not less then NFS4_POLL_RETRY_MIN.
7671 * - One last time a jiffie before we give up
7672 * - exponential backoff (time_now minus start_attempt)
7673 */
7674 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7675 min((giveup - now - 1),
7676 now - lgp->args.timestamp));
7677
7678 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7679 __func__, delay);
7680 rpc_delay(task, delay);
7681 task->tk_status = 0;
7682 rpc_restart_call_prepare(task);
7683 goto out; /* Do not call nfs4_async_handle_error() */
7684 }
ee314c2a
TM		 7685 break;
7686 case -NFS4ERR_EXPIRED:
7687 case -NFS4ERR_BAD_STATEID:
7688 spin_lock(&inode->i_lock);
7689 lo = NFS_I(inode)->layout;
7690 if (!lo || list_empty(&lo->plh_segs)) {
7691 spin_unlock(&inode->i_lock);
7692 /* If the open stateid was bad, then recover it. */
7693 state = lgp->args.ctx->state;
7694 } else {
7695 LIST_HEAD(head);
7696
defb8460
CH		 7697 /*
7698 * Mark the bad layout state as invalid, then retry
7699 * with the current stateid.
7700 */
ee314c2a
TM		 7701 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7702 spin_unlock(&inode->i_lock);
ee314c2a 7703 pnfs_free_lseg_list(&head);
defb8460
CH		 7704
7705 task->tk_status = 0;
7706 rpc_restart_call_prepare(task);
b1f69b75
AA		 7707 }
7708 }
8478eaa1 7709 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
ee314c2a
TM		 7710 rpc_restart_call_prepare(task);
7711out:
b1f69b75
AA		 7712 dprintk("<-- %s\n", __func__);
7713}
7714
8554116e
IK		 7715static size_t max_response_pages(struct nfs_server *server)
7716{
7717 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7718 return nfs_page_array_len(0, max_resp_sz);
7719}
7720
7721static void nfs4_free_pages(struct page **pages, size_t size)
7722{
7723 int i;
7724
7725 if (!pages)
7726 return;
7727
7728 for (i = 0; i < size; i++) {
7729 if (!pages[i])
7730 break;
7731 __free_page(pages[i]);
7732 }
7733 kfree(pages);
7734}
7735
7736static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7737{
7738 struct page **pages;
7739 int i;
7740
7741 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7742 if (!pages) {
7743 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7744 return NULL;
7745 }
7746
7747 for (i = 0; i < size; i++) {
7748 pages[i] = alloc_page(gfp_flags);
7749 if (!pages[i]) {
7750 dprintk("%s: failed to allocate page\n", __func__);
7751 nfs4_free_pages(pages, size);
7752 return NULL;
7753 }
7754 }
7755
7756 return pages;
7757}
7758
b1f69b75
AA		 7759static void nfs4_layoutget_release(void *calldata)
7760{
7761 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7762 struct inode *inode = lgp->args.inode;
7763 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7764 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7765
7766 dprintk("--> %s\n", __func__);
8554116e 7767 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7768 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7769 put_nfs_open_context(lgp->args.ctx);
7770 kfree(calldata);
7771 dprintk("<-- %s\n", __func__);
7772}
7773
7774static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7775 .rpc_call_prepare = nfs4_layoutget_prepare,
7776 .rpc_call_done = nfs4_layoutget_done,
7777 .rpc_release = nfs4_layoutget_release,
7778};
7779
a0b0a6e3
TM		 7780struct pnfs_layout_segment *
7781nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7782{
a47970ff
WAA		 7783 struct inode *inode = lgp->args.inode;
7784 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7785 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7786 struct rpc_task *task;
7787 struct rpc_message msg = {
7788 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7789 .rpc_argp = &lgp->args,
7790 .rpc_resp = &lgp->res,
6ab59344 7791 .rpc_cred = lgp->cred,
b1f69b75
AA		 7792 };
7793 struct rpc_task_setup task_setup_data = {
7794 .rpc_client = server->client,
7795 .rpc_message = &msg,
7796 .callback_ops = &nfs4_layoutget_call_ops,
7797 .callback_data = lgp,
7798 .flags = RPC_TASK_ASYNC,
7799 };
a0b0a6e3 7800 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7801 int status = 0;
7802
7803 dprintk("--> %s\n", __func__);
7804
4bd5a980
PT		 7805 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7806 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7807
8554116e
IK		 7808 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7809 if (!lgp->args.layout.pages) {
7810 nfs4_layoutget_release(lgp);
a0b0a6e3 7811 return ERR_PTR(-ENOMEM);
8554116e
IK		 7812 }
7813 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7814 lgp->args.timestamp = jiffies;
8554116e 7815
35124a09 7816 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7817 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7818 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 7819
b1f69b75
AA		 7820 task = rpc_run_task(&task_setup_data);
7821 if (IS_ERR(task))
a0b0a6e3 7822 return ERR_CAST(task);
b1f69b75 7823 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7824 if (status == 0)
7825 status = task->tk_status;
1037e6ea
TM		 7826 trace_nfs4_layoutget(lgp->args.ctx,
7827 &lgp->args.range,
7828 &lgp->res.range,
7829 status);
085b7a45
WAA		 7830 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7831 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7832 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7833 rpc_put_task(task);
7834 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7835 if (status)
7836 return ERR_PTR(status);
7837 return lseg;
b1f69b75
AA		 7838}
7839
cbe82603
BH		 7840static void
7841nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7842{
7843 struct nfs4_layoutreturn *lrp = calldata;
7844
7845 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7846 nfs41_setup_sequence(lrp->clp->cl_session,
7847 &lrp->args.seq_args,
7848 &lrp->res.seq_res,
7849 task);
cbe82603
BH		 7850}
7851
7852static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7853{
7854 struct nfs4_layoutreturn *lrp = calldata;
7855 struct nfs_server *server;
7856
7857 dprintk("--> %s\n", __func__);
7858
6ba7db34 7859 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7860 return;
7861
7862 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7863 switch (task->tk_status) {
7864 default:
7865 task->tk_status = 0;
7866 case 0:
7867 break;
7868 case -NFS4ERR_DELAY:
8478eaa1 7869 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 7870 break;
d00c5d43 7871 rpc_restart_call_prepare(task);
cbe82603
BH		 7872 return;
7873 }
cbe82603
BH		 7874 dprintk("<-- %s\n", __func__);
7875}
7876
7877static void nfs4_layoutreturn_release(void *calldata)
7878{
7879 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7880 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7881
7882 dprintk("--> %s\n", __func__);
849b286f
TM		 7883 spin_lock(&lo->plh_inode->i_lock);
7884 if (lrp->res.lrs_present)
7885 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
d67ae825 7886 pnfs_clear_layoutreturn_waitbit(lo);
193e3aa2
PT		 7887 clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, &lo->plh_flags);
7888 rpc_wake_up(&NFS_SERVER(lo->plh_inode)->roc_rpcwaitq);
849b286f
TM		 7889 lo->plh_block_lgets--;
7890 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7891 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 7892 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 7893 kfree(calldata);
7894 dprintk("<-- %s\n", __func__);
7895}
7896
7897static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7898 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7899 .rpc_call_done = nfs4_layoutreturn_done,
7900 .rpc_release = nfs4_layoutreturn_release,
7901};
7902
6c16605d 7903int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 7904{
7905 struct rpc_task *task;
7906 struct rpc_message msg = {
7907 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7908 .rpc_argp = &lrp->args,
7909 .rpc_resp = &lrp->res,
9556000d 7910 .rpc_cred = lrp->cred,
cbe82603
BH		 7911 };
7912 struct rpc_task_setup task_setup_data = {
1771c577 7913 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7914 .rpc_message = &msg,
7915 .callback_ops = &nfs4_layoutreturn_call_ops,
7916 .callback_data = lrp,
7917 };
6c16605d 7918 int status = 0;
cbe82603
BH		 7919
7920 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 7921 if (!sync) {
7922 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
7923 if (!lrp->inode) {
7924 nfs4_layoutreturn_release(lrp);
7925 return -EAGAIN;
7926 }
7927 task_setup_data.flags |= RPC_TASK_ASYNC;
7928 }
a9c92d6b 7929 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7930 task = rpc_run_task(&task_setup_data);
7931 if (IS_ERR(task))
7932 return PTR_ERR(task);
5a0ec8ac
TM		 7933 if (sync)
7934 status = task->tk_status;
1037e6ea 7935 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7936 dprintk("<-- %s status=%d\n", __func__, status);
7937 rpc_put_task(task);
7938 return status;
7939}
7940
b1f69b75 7941static int
cd5875fe
TM		 7942_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7943 struct pnfs_device *pdev,
7944 struct rpc_cred *cred)
b1f69b75
AA		 7945{
7946 struct nfs4_getdeviceinfo_args args = {
7947 .pdev = pdev,
4e590803
TM		 7948 .notify_types = NOTIFY_DEVICEID4_CHANGE |
7949 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 7950 };
7951 struct nfs4_getdeviceinfo_res res = {
7952 .pdev = pdev,
7953 };
7954 struct rpc_message msg = {
7955 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7956 .rpc_argp = &args,
7957 .rpc_resp = &res,
cd5875fe 7958 .rpc_cred = cred,
b1f69b75
AA		 7959 };
7960 int status;
7961
7962 dprintk("--> %s\n", __func__);
7c513058 7963 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 7964 if (res.notification & ~args.notify_types)
7965 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 7966 if (res.notification != args.notify_types)
7967 pdev->nocache = 1;
4e590803 7968
b1f69b75
AA		 7969 dprintk("<-- %s status=%d\n", __func__, status);
7970
7971 return status;
7972}
7973
cd5875fe
TM		 7974int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7975 struct pnfs_device *pdev,
7976 struct rpc_cred *cred)
b1f69b75
AA		 7977{
7978 struct nfs4_exception exception = { };
7979 int err;
7980
7981 do {
7982 err = nfs4_handle_exception(server,
cd5875fe 7983 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7984 &exception);
7985 } while (exception.retry);
7986 return err;
7987}
7988EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7989
863a3c6c
AA		 7990static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7991{
7992 struct nfs4_layoutcommit_data *data = calldata;
7993 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7994 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7995
d9afbd1b
TM		 7996 nfs41_setup_sequence(session,
7997 &data->args.seq_args,
7998 &data->res.seq_res,
7999 task);
863a3c6c
AA		 8000}
8001
8002static void
8003nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8004{
8005 struct nfs4_layoutcommit_data *data = calldata;
8006 struct nfs_server *server = NFS_SERVER(data->args.inode);
8007
6ba7db34 8008 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8009 return;
8010
8011 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8012 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8013 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8014 case -NFS4ERR_BADLAYOUT: /* no layout */
8015 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8016 task->tk_status = 0;
e59d27e0 8017 case 0:
e59d27e0
TM		 8018 break;
8019 default:
8478eaa1 8020 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8021 rpc_restart_call_prepare(task);
8022 return;
8023 }
8024 }
863a3c6c
AA		 8025}
8026
8027static void nfs4_layoutcommit_release(void *calldata)
8028{
8029 struct nfs4_layoutcommit_data *data = calldata;
8030
db29c089 8031 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8032 nfs_post_op_update_inode_force_wcc(data->args.inode,
8033 data->res.fattr);
863a3c6c 8034 put_rpccred(data->cred);
472e2594 8035 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8036 kfree(data);
8037}
8038
8039static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8040 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8041 .rpc_call_done = nfs4_layoutcommit_done,
8042 .rpc_release = nfs4_layoutcommit_release,
8043};
8044
8045int
ef311537 8046nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8047{
8048 struct rpc_message msg = {
8049 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8050 .rpc_argp = &data->args,
8051 .rpc_resp = &data->res,
8052 .rpc_cred = data->cred,
8053 };
8054 struct rpc_task_setup task_setup_data = {
8055 .task = &data->task,
8056 .rpc_client = NFS_CLIENT(data->args.inode),
8057 .rpc_message = &msg,
8058 .callback_ops = &nfs4_layoutcommit_ops,
8059 .callback_data = data,
863a3c6c
AA		 8060 };
8061 struct rpc_task *task;
8062 int status = 0;
8063
8064 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
8065 "lbw: %llu inode %lu\n",
8066 data->task.tk_pid, sync,
8067 data->args.lastbytewritten,
8068 data->args.inode->i_ino);
8069
472e2594
TM		 8070 if (!sync) {
8071 data->inode = nfs_igrab_and_active(data->args.inode);
8072 if (data->inode == NULL) {
8073 nfs4_layoutcommit_release(data);
8074 return -EAGAIN;
8075 }
8076 task_setup_data.flags = RPC_TASK_ASYNC;
8077 }
a9c92d6b 8078 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8079 task = rpc_run_task(&task_setup_data);
8080 if (IS_ERR(task))
8081 return PTR_ERR(task);
472e2594
TM		 8082 if (sync)
8083 status = task->tk_status;
1037e6ea 8084 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 8085 dprintk("%s: status %d\n", __func__, status);
8086 rpc_put_task(task);
8087 return status;
8088}
fca78d6d 8089
97431204
AA		 8090/**
8091 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8092 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8093 */
fca78d6d
BS		 8094static int
8095_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8096 struct nfs_fsinfo *info,
8097 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8098{
8099 struct nfs41_secinfo_no_name_args args = {
8100 .style = SECINFO_STYLE_CURRENT_FH,
8101 };
8102 struct nfs4_secinfo_res res = {
8103 .flavors = flavors,
8104 };
8105 struct rpc_message msg = {
8106 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8107 .rpc_argp = &args,
8108 .rpc_resp = &res,
8109 };
b1b3e136 8110 struct rpc_clnt *clnt = server->client;
7cb852df 8111 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8112 int status;
8113
8114 if (use_integrity) {
8115 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8116 cred = nfs4_get_clid_cred(server->nfs_client);
8117 msg.rpc_cred = cred;
b1b3e136
WAA		 8118 }
8119
8120 dprintk("--> %s\n", __func__);
8121 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8122 &res.seq_res, 0);
8123 dprintk("<-- %s status=%d\n", __func__, status);
8124
7cb852df
WAA		 8125 if (cred)
8126 put_rpccred(cred);
b1b3e136
WAA		 8127
8128 return status;
fca78d6d
BS		 8129}
8130
8131static int
8132nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8133 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8134{
8135 struct nfs4_exception exception = { };
8136 int err;
8137 do {
b1b3e136
WAA		 8138 /* first try using integrity protection */
8139 err = -NFS4ERR_WRONGSEC;
8140
8141 /* try to use integrity protection with machine cred */
8142 if (_nfs4_is_integrity_protected(server->nfs_client))
8143 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8144 flavors, true);
8145
8146 /*
8147 * if unable to use integrity protection, or SECINFO with
8148 * integrity protection returns NFS4ERR_WRONGSEC (which is
8149 * disallowed by spec, but exists in deployed servers) use
8150 * the current filesystem's rpc_client and the user cred.
8151 */
8152 if (err == -NFS4ERR_WRONGSEC)
8153 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8154 flavors, false);
8155
fca78d6d
BS		 8156 switch (err) {
8157 case 0:
8158 case -NFS4ERR_WRONGSEC:
78b19bae 8159 case -ENOTSUPP:
05e9cfb4 8160 goto out;
fca78d6d
BS		 8161 default:
8162 err = nfs4_handle_exception(server, err, &exception);
8163 }
8164 } while (exception.retry);
05e9cfb4 8165out:
fca78d6d
BS		 8166 return err;
8167}
8168
8169static int
8170nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8171 struct nfs_fsinfo *info)
8172{
8173 int err;
8174 struct page *page;
367156d9 8175 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8176 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8177 struct nfs4_secinfo4 *secinfo;
8178 int i;
fca78d6d
BS		 8179
8180 page = alloc_page(GFP_KERNEL);
8181 if (!page) {
8182 err = -ENOMEM;
8183 goto out;
8184 }
8185
8186 flavors = page_address(page);
8187 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8188
8189 /*
8190 * Fall back on "guess and check" method if
8191 * the server doesn't support SECINFO_NO_NAME
8192 */
78b19bae 8193 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8194 err = nfs4_find_root_sec(server, fhandle, info);
8195 goto out_freepage;
8196 }
8197 if (err)
8198 goto out_freepage;
8199
58a8cf12
WAA		 8200 for (i = 0; i < flavors->num_flavors; i++) {
8201 secinfo = &flavors->flavors[i];
8202
8203 switch (secinfo->flavor) {
8204 case RPC_AUTH_NULL:
8205 case RPC_AUTH_UNIX:
8206 case RPC_AUTH_GSS:
8207 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8208 &secinfo->flavor_info);
8209 break;
8210 default:
8211 flavor = RPC_AUTH_MAXFLAVOR;
8212 break;
8213 }
8214
4d4b69dd
WAA		 8215 if (!nfs_auth_info_match(&server->auth_info, flavor))
8216 flavor = RPC_AUTH_MAXFLAVOR;
8217
58a8cf12
WAA		 8218 if (flavor != RPC_AUTH_MAXFLAVOR) {
8219 err = nfs4_lookup_root_sec(server, fhandle,
8220 info, flavor);
8221 if (!err)
8222 break;
8223 }
8224 }
8225
8226 if (flavor == RPC_AUTH_MAXFLAVOR)
8227 err = -EPERM;
fca78d6d
BS		 8228
8229out_freepage:
8230 put_page(page);
8231 if (err == -EACCES)
8232 return -EPERM;
8233out:
8234 return err;
8235}
1cab0652 8236
ab7cb0df
TM		 8237static int _nfs41_test_stateid(struct nfs_server *server,
8238 nfs4_stateid *stateid,
8239 struct rpc_cred *cred)
7d974794
BS		 8240{
8241 int status;
8242 struct nfs41_test_stateid_args args = {
1cab0652 8243 .stateid = stateid,
7d974794
BS		 8244 };
8245 struct nfs41_test_stateid_res res;
8246 struct rpc_message msg = {
8247 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8248 .rpc_argp = &args,
8249 .rpc_resp = &res,
ab7cb0df 8250 .rpc_cred = cred,
7d974794 8251 };
3787d506
WAA		 8252 struct rpc_clnt *rpc_client = server->client;
8253
8254 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8255 &rpc_client, &msg);
1cab0652 8256
38527b15 8257 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8258 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8259 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8260 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8261 &args.seq_args, &res.seq_res);
38527b15
CL		 8262 if (status != NFS_OK) {
8263 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8264 return status;
38527b15
CL		 8265 }
8266 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8267 return -res.status;
7d974794
BS		 8268}
8269
38527b15
CL		 8270/**
8271 * nfs41_test_stateid - perform a TEST_STATEID operation
8272 *
8273 * @server: server / transport on which to perform the operation
8274 * @stateid: state ID to test
ab7cb0df 8275 * @cred: credential
38527b15
CL		 8276 *
8277 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8278 * Otherwise a negative NFS4ERR value is returned if the operation
8279 * failed or the state ID is not currently valid.
8280 */
ab7cb0df
TM		 8281static int nfs41_test_stateid(struct nfs_server *server,
8282 nfs4_stateid *stateid,
8283 struct rpc_cred *cred)
7d974794
BS		 8284{
8285 struct nfs4_exception exception = { };
8286 int err;
8287 do {
ab7cb0df 8288 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8289 if (err != -NFS4ERR_DELAY)
8290 break;
8291 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8292 } while (exception.retry);
8293 return err;
8294}
9aeda35f 8295
7c1d5fae
TM		 8296struct nfs_free_stateid_data {
8297 struct nfs_server *server;
8298 struct nfs41_free_stateid_args args;
9aeda35f 8299 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8300};
8301
8302static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8303{
8304 struct nfs_free_stateid_data *data = calldata;
8305 nfs41_setup_sequence(nfs4_get_session(data->server),
8306 &data->args.seq_args,
8307 &data->res.seq_res,
8308 task);
8309}
8310
8311static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8312{
8313 struct nfs_free_stateid_data *data = calldata;
8314
8315 nfs41_sequence_done(task, &data->res.seq_res);
8316
8317 switch (task->tk_status) {
8318 case -NFS4ERR_DELAY:
8478eaa1 8319 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8320 rpc_restart_call_prepare(task);
8321 }
8322}
8323
8324static void nfs41_free_stateid_release(void *calldata)
8325{
8326 kfree(calldata);
8327}
8328
17f26b12 8329static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8330 .rpc_call_prepare = nfs41_free_stateid_prepare,
8331 .rpc_call_done = nfs41_free_stateid_done,
8332 .rpc_release = nfs41_free_stateid_release,
8333};
8334
8335static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8336 nfs4_stateid *stateid,
ab7cb0df 8337 struct rpc_cred *cred,
7c1d5fae
TM		 8338 bool privileged)
8339{
9aeda35f
BS		 8340 struct rpc_message msg = {
8341 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8342 .rpc_cred = cred,
9aeda35f 8343 };
7c1d5fae
TM		 8344 struct rpc_task_setup task_setup = {
8345 .rpc_client = server->client,
8346 .rpc_message = &msg,
8347 .callback_ops = &nfs41_free_stateid_ops,
8348 .flags = RPC_TASK_ASYNC,
8349 };
8350 struct nfs_free_stateid_data *data;
9aeda35f 8351
3787d506
WAA		 8352 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8353 &task_setup.rpc_client, &msg);
8354
38527b15 8355 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8356 data = kmalloc(sizeof(*data), GFP_NOFS);
8357 if (!data)
8358 return ERR_PTR(-ENOMEM);
8359 data->server = server;
8360 nfs4_stateid_copy(&data->args.stateid, stateid);
8361
8362 task_setup.callback_data = data;
8363
8364 msg.rpc_argp = &data->args;
8365 msg.rpc_resp = &data->res;
a9c92d6b 8366 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8367 if (privileged)
8368 nfs4_set_sequence_privileged(&data->args.seq_args);
8369
8370 return rpc_run_task(&task_setup);
9aeda35f
BS		 8371}
8372
38527b15
CL		 8373/**
8374 * nfs41_free_stateid - perform a FREE_STATEID operation
8375 *
8376 * @server: server / transport on which to perform the operation
8377 * @stateid: state ID to release
ab7cb0df 8378 * @cred: credential
38527b15
CL		 8379 *
8380 * Returns NFS_OK if the server freed "stateid". Otherwise a
8381 * negative NFS4ERR value is returned.
8382 */
ab7cb0df
TM		 8383static int nfs41_free_stateid(struct nfs_server *server,
8384 nfs4_stateid *stateid,
8385 struct rpc_cred *cred)
9aeda35f 8386{
7c1d5fae
TM		 8387 struct rpc_task *task;
8388 int ret;
8389
ab7cb0df 8390 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8391 if (IS_ERR(task))
8392 return PTR_ERR(task);
8393 ret = rpc_wait_for_completion_task(task);
8394 if (!ret)
8395 ret = task->tk_status;
8396 rpc_put_task(task);
8397 return ret;
9aeda35f 8398}
36281caa 8399
f1cdae87
JL		 8400static void
8401nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8402{
8403 struct rpc_task *task;
ab7cb0df 8404 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8405
ab7cb0df 8406 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8407 nfs4_free_lock_state(server, lsp);
8408 if (IS_ERR(task))
f1cdae87 8409 return;
c8b2d0bf 8410 rpc_put_task(task);
c8b2d0bf
TM		 8411}
8412
36281caa
TM		 8413static bool nfs41_match_stateid(const nfs4_stateid *s1,
8414 const nfs4_stateid *s2)
8415{
2d2f24ad 8416 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8417 return false;
8418
2d2f24ad 8419 if (s1->seqid == s2->seqid)
36281caa 8420 return true;
2d2f24ad 8421 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8422 return true;
8423
8424 return false;
8425}
8426
557134a3
AA		 8427#endif /* CONFIG_NFS_V4_1 */
8428
36281caa
TM		 8429static bool nfs4_match_stateid(const nfs4_stateid *s1,
8430 const nfs4_stateid *s2)
8431{
f597c537 8432 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8433}
8434
8435
17280175 8436static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8437 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8438 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8439 .recover_open = nfs4_open_reclaim,
8440 .recover_lock = nfs4_lock_reclaim,
591d71cb 8441 .establish_clid = nfs4_init_clientid,
05f4c350 8442 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8443};
8444
591d71cb 8445#if defined(CONFIG_NFS_V4_1)
17280175 8446static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8447 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8448 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8449 .recover_open = nfs4_open_reclaim,
8450 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8451 .establish_clid = nfs41_init_clientid,
fce5c838 8452 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8453 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8454};
8455#endif /* CONFIG_NFS_V4_1 */
8456
17280175 8457static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8458 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8459 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8460 .recover_open = nfs40_open_expired,
591d71cb
AA		 8461 .recover_lock = nfs4_lock_expired,
8462 .establish_clid = nfs4_init_clientid,
8463};
8464
8465#if defined(CONFIG_NFS_V4_1)
17280175 8466static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8467 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8468 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8469 .recover_open = nfs41_open_expired,
8470 .recover_lock = nfs41_lock_expired,
4d643d1d 8471 .establish_clid = nfs41_init_clientid,
1da177e4 8472};
591d71cb 8473#endif /* CONFIG_NFS_V4_1 */
1da177e4 8474
17280175 8475static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8476 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8477 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8478 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8479};
8480
8481#if defined(CONFIG_NFS_V4_1)
17280175 8482static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8483 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8484 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8485 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8486};
8487#endif
8488
ec011fe8 8489static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8490 .get_locations = _nfs40_proc_get_locations,
44c99933 8491 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8492};
8493
8494#if defined(CONFIG_NFS_V4_1)
8495static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8496 .get_locations = _nfs41_proc_get_locations,
44c99933 8497 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8498};
8499#endif /* CONFIG_NFS_V4_1 */
8500
97dc1359
TM		 8501static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8502 .minor_version = 0,
39c6daae
TM		 8503 .init_caps = NFS_CAP_READDIRPLUS
8504 | NFS_CAP_ATOMIC_OPEN
8505 | NFS_CAP_CHANGE_ATTR
8506 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8507 .init_client = nfs40_init_client,
8508 .shutdown_client = nfs40_shutdown_client,
36281caa 8509 .match_stateid = nfs4_match_stateid,
fca78d6d 8510 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8511 .free_lock_state = nfs4_release_lockowner,
63f5f796 8512 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8513 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8514 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8515 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8516 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8517 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8518};
8519
8520#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8521static struct nfs_seqid *
8522nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8523{
8524 return NULL;
8525}
8526
97dc1359
TM		 8527static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8528 .minor_version = 1,
39c6daae
TM		 8529 .init_caps = NFS_CAP_READDIRPLUS
8530 | NFS_CAP_ATOMIC_OPEN
8531 | NFS_CAP_CHANGE_ATTR
3b66486c 8532 | NFS_CAP_POSIX_LOCK
49f9a0fa 8533 | NFS_CAP_STATEID_NFSV41
e983120e 8534 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8535 .init_client = nfs41_init_client,
8536 .shutdown_client = nfs41_shutdown_client,
36281caa 8537 .match_stateid = nfs41_match_stateid,
fca78d6d 8538 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8539 .free_lock_state = nfs41_free_lock_state,
63f5f796 8540 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8541 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8542 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8543 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8544 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8545 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8546};
8547#endif
8548
42c2c424
SD		 8549#if defined(CONFIG_NFS_V4_2)
8550static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8551 .minor_version = 2,
7017310a
BS		 8552 .init_caps = NFS_CAP_READDIRPLUS
8553 | NFS_CAP_ATOMIC_OPEN
8554 | NFS_CAP_CHANGE_ATTR
8555 | NFS_CAP_POSIX_LOCK
8556 | NFS_CAP_STATEID_NFSV41
e983120e 8557 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8558 | NFS_CAP_ALLOCATE
624bd5b7 8559 | NFS_CAP_DEALLOCATE
e983120e 8560 | NFS_CAP_SEEK,
abf79bb3
CL		 8561 .init_client = nfs41_init_client,
8562 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8563 .match_stateid = nfs41_match_stateid,
8564 .find_root_sec = nfs41_find_root_sec,
7017310a 8565 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8566 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8567 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8568 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8569 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8570 .state_renewal_ops = &nfs41_state_renewal_ops,
8571};
8572#endif
8573
97dc1359
TM		 8574const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8575 [0] = &nfs_v4_0_minor_ops,
8576#if defined(CONFIG_NFS_V4_1)
8577 [1] = &nfs_v4_1_minor_ops,
8578#endif
42c2c424
SD		 8579#if defined(CONFIG_NFS_V4_2)
8580 [2] = &nfs_v4_2_minor_ops,
8581#endif
97dc1359
TM		 8582};
8583
17f26b12 8584static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8585 .create = nfs_create,
8586 .lookup = nfs_lookup,
8587 .atomic_open = nfs_atomic_open,
8588 .link = nfs_link,
8589 .unlink = nfs_unlink,
8590 .symlink = nfs_symlink,
8591 .mkdir = nfs_mkdir,
8592 .rmdir = nfs_rmdir,
8593 .mknod = nfs_mknod,
8594 .rename = nfs_rename,
8595 .permission = nfs_permission,
8596 .getattr = nfs_getattr,
8597 .setattr = nfs_setattr,
8598 .getxattr = generic_getxattr,
8599 .setxattr = generic_setxattr,
8600 .listxattr = generic_listxattr,
8601 .removexattr = generic_removexattr,
8602};
8603
92e1d5be 8604static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8605 .permission = nfs_permission,
8606 .getattr = nfs_getattr,
8607 .setattr = nfs_setattr,
64c2ce8b
AK		 8608 .getxattr = generic_getxattr,
8609 .setxattr = generic_setxattr,
8610 .listxattr = generic_listxattr,
8611 .removexattr = generic_removexattr,
6b3b5496
BF		 8612};
8613
509de811 8614const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8615 .version = 4, /* protocol version */
8616 .dentry_ops = &nfs4_dentry_operations,
8617 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8618 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8619 .file_ops = &nfs4_file_operations,
1da177e4 8620 .getroot = nfs4_proc_get_root,
281cad46 8621 .submount = nfs4_submount,
ff9099f2 8622 .try_mount = nfs4_try_mount,
1da177e4
LT		 8623 .getattr = nfs4_proc_getattr,
8624 .setattr = nfs4_proc_setattr,
8625 .lookup = nfs4_proc_lookup,
8626 .access = nfs4_proc_access,
8627 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8628 .create = nfs4_proc_create,
8629 .remove = nfs4_proc_remove,
8630 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8631 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8632 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8633 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8634 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8635 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8636 .link = nfs4_proc_link,
8637 .symlink = nfs4_proc_symlink,
8638 .mkdir = nfs4_proc_mkdir,
8639 .rmdir = nfs4_proc_remove,
8640 .readdir = nfs4_proc_readdir,
8641 .mknod = nfs4_proc_mknod,
8642 .statfs = nfs4_proc_statfs,
8643 .fsinfo = nfs4_proc_fsinfo,
8644 .pathconf = nfs4_proc_pathconf,
e9326dca 8645 .set_capabilities = nfs4_server_capabilities,
1da177e4 8646 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8647 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8648 .read_setup = nfs4_proc_read_setup,
ec06c096 8649 .read_done = nfs4_read_done,
1da177e4 8650 .write_setup = nfs4_proc_write_setup,
788e7a89 8651 .write_done = nfs4_write_done,
1da177e4 8652 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8653 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8654 .commit_done = nfs4_commit_done,
1da177e4 8655 .lock = nfs4_proc_lock,
e50a1c2e 8656 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8657 .close_context = nfs4_close_context,
2b484297 8658 .open_context = nfs4_atomic_open,
011e2a7f 8659 .have_delegation = nfs4_have_delegation,
57ec14c5 8660 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8661 .alloc_client = nfs4_alloc_client,
45a52a02 8662 .init_client = nfs4_init_client,
cdb7eced 8663 .free_client = nfs4_free_client,
1179acc6
BS		 8664 .create_server = nfs4_create_server,
8665 .clone_server = nfs_clone_server,
1da177e4
LT		 8666};
8667
64c2ce8b
AK		 8668static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8669 .prefix = XATTR_NAME_NFSV4_ACL,
8670 .list = nfs4_xattr_list_nfs4_acl,
8671 .get = nfs4_xattr_get_nfs4_acl,
8672 .set = nfs4_xattr_set_nfs4_acl,
8673};
8674
8675const struct xattr_handler *nfs4_xattr_handlers[] = {
8676 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8677#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8678 &nfs4_xattr_nfs4_label_handler,
8679#endif
64c2ce8b
AK		 8680 NULL
8681};
8682
1da177e4
LT		 8683/*
8684 * Local variables:
8685 * c-basic-offset: 8
8686 * End:
8687 */
Linux 6.x block layer and io_uring tree(s)