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nfs: stat(2) fails during cthon04 basic test5 on NFSv4.0
[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 */
2b0143b5 297 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
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 */
2b0143b5 309 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
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);
2b0143b5 1008 struct inode *dir = d_inode(parent);
e56e0b78 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:
2b0143b5 1061 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 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{
2b0143b5 1798 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 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 1954{
2b0143b5 1955 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 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{
2b0143b5 2002 struct inode *dir = d_inode(data->dir);
b257957e
AB		 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{
2b0143b5 2071 struct inode *dir = d_inode(data->dir);
b257957e
AB		 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 2317 dentry = opendata->dentry;
2b0143b5 2318 if (d_really_is_negative(dentry)) {
275bb307
TM		 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,
2b0143b5 2329 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 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;
2b0143b5 2337 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 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;
2b0143b5
DH		 2378 if (d_really_is_positive(dentry))
2379 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2380 status = -ENOMEM;
2b0143b5 2381 if (d_really_is_positive(dentry))
49f9a0fa 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 }
2b0143b5
DH		 2404 if (d_really_is_positive(dentry))
2405 opendata->state = nfs4_get_open_state(d_inode(dentry), 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{
c7757074 3099 int status = 0;
2ed4b95b 3100
c7757074 3101 if (!auth_probe)
5e6b1990 3102 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3103
3104 if (auth_probe || status == NFS4ERR_WRONGSEC)
2ed4b95b
CL		 3105 status = nfs4_do_find_root_sec(server, fhandle, info);
3106
1da177e4
LT		 3107 if (status == 0)
3108 status = nfs4_server_capabilities(server, fhandle);
3109 if (status == 0)
3110 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3111
c12e87f4 3112 return nfs4_map_errors(status);
1da177e4
LT		 3113}
3114
bae36241
BS		 3115static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3116 struct nfs_fsinfo *info)
3117{
3118 int error;
3119 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3120 struct nfs4_label *label = NULL;
bae36241
BS		 3121
3122 error = nfs4_server_capabilities(server, mntfh);
3123 if (error < 0) {
3124 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3125 return error;
3126 }
3127
14c43f76
DQ		 3128 label = nfs4_label_alloc(server, GFP_KERNEL);
3129 if (IS_ERR(label))
3130 return PTR_ERR(label);
3131
1775fd3e 3132 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3133 if (error < 0) {
3134 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3135 goto err_free_label;
bae36241
BS		 3136 }
3137
3138 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3139 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3140 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3141
14c43f76
DQ		 3142err_free_label:
3143 nfs4_label_free(label);
3144
bae36241
BS		 3145 return error;
3146}
3147
6b97fd3d
MN		 3148/*
3149 * Get locations and (maybe) other attributes of a referral.
3150 * Note that we'll actually follow the referral later when
3151 * we detect fsid mismatch in inode revalidation
3152 */
f05d147f
BS		 3153static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3154 const struct qstr *name, struct nfs_fattr *fattr,
3155 struct nfs_fh *fhandle)
6b97fd3d
MN		 3156{
3157 int status = -ENOMEM;
3158 struct page *page = NULL;
3159 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3160
3161 page = alloc_page(GFP_KERNEL);
3162 if (page == NULL)
3163 goto out;
3164 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3165 if (locations == NULL)
3166 goto out;
3167
f05d147f 3168 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3169 if (status != 0)
3170 goto out;
519ae255
CL		 3171
3172 /*
3173 * If the fsid didn't change, this is a migration event, not a
3174 * referral. Cause us to drop into the exception handler, which
3175 * will kick off migration recovery.
3176 */
6b97fd3d 3177 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3178 dprintk("%s: server did not return a different fsid for"
3179 " a referral at %s\n", __func__, name->name);
519ae255 3180 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3181 goto out;
3182 }
533eb461
AA		 3183 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3184 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3185
533eb461 3186 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3187 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3188 memset(fhandle, 0, sizeof(struct nfs_fh));
3189out:
3190 if (page)
3191 __free_page(page);
5d7ca35a 3192 kfree(locations);
6b97fd3d
MN		 3193 return status;
3194}
3195
1775fd3e
DQ		 3196static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3197 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3198{
3199 struct nfs4_getattr_arg args = {
3200 .fh = fhandle,
3201 .bitmask = server->attr_bitmask,
3202 };
3203 struct nfs4_getattr_res res = {
3204 .fattr = fattr,
1775fd3e 3205 .label = label,
1da177e4
LT		 3206 .server = server,
3207 };
3208 struct rpc_message msg = {
3209 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3210 .rpc_argp = &args,
3211 .rpc_resp = &res,
3212 };
aa9c2669
DQ		 3213
3214 args.bitmask = nfs4_bitmask(server, label);
3215
0e574af1 3216 nfs_fattr_init(fattr);
7c513058 3217 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3218}
3219
1775fd3e
DQ		 3220static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3221 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3222{
3223 struct nfs4_exception exception = { };
3224 int err;
3225 do {
b5f875a9
TM		 3226 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3227 trace_nfs4_getattr(server, fhandle, fattr, err);
3228 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3229 &exception);
3230 } while (exception.retry);
3231 return err;
3232}
3233
3234/*
3235 * The file is not closed if it is opened due to the a request to change
3236 * the size of the file. The open call will not be needed once the
3237 * VFS layer lookup-intents are implemented.
3238 *
3239 * Close is called when the inode is destroyed.
3240 * If we haven't opened the file for O_WRONLY, we
3241 * need to in the size_change case to obtain a stateid.
3242 *
3243 * Got race?
3244 * Because OPEN is always done by name in nfsv4, it is
3245 * possible that we opened a different file by the same
3246 * name. We can recognize this race condition, but we
3247 * can't do anything about it besides returning an error.
3248 *
3249 * This will be fixed with VFS changes (lookup-intent).
3250 */
3251static int
3252nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3253 struct iattr *sattr)
3254{
2b0143b5 3255 struct inode *inode = d_inode(dentry);
659bfcd6 3256 struct rpc_cred *cred = NULL;
d530838b 3257 struct nfs4_state *state = NULL;
14c43f76 3258 struct nfs4_label *label = NULL;
1da177e4
LT		 3259 int status;
3260
88ac815c
PT		 3261 if (pnfs_ld_layoutret_on_setattr(inode) &&
3262 sattr->ia_valid & ATTR_SIZE &&
3263 sattr->ia_size < i_size_read(inode))
24028672 3264 pnfs_commit_and_return_layout(inode);
8a1636c4 3265
0e574af1 3266 nfs_fattr_init(fattr);
1da177e4 3267
2669940d
AA		 3268 /* Deal with open(O_TRUNC) */
3269 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3270 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3271
3272 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3273 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3274 return 0;
3275
d530838b 3276 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3277 if (sattr->ia_valid & ATTR_FILE) {
3278 struct nfs_open_context *ctx;
3279
3280 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3281 if (ctx) {
3282 cred = ctx->cred;
3283 state = ctx->state;
3284 }
659bfcd6 3285 }
08e9eac4 3286
14c43f76
DQ		 3287 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3288 if (IS_ERR(label))
3289 return PTR_ERR(label);
3290
3291 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3292 if (status == 0) {
f044636d 3293 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3294 nfs_setsecurity(inode, fattr, label);
3295 }
14c43f76 3296 nfs4_label_free(label);
1da177e4
LT		 3297 return status;
3298}
3299
0c2e53f1
TM		 3300static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3301 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3302 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3303{
0c2e53f1 3304 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3305 int status;
3306 struct nfs4_lookup_arg args = {
3307 .bitmask = server->attr_bitmask,
0c2e53f1 3308 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3309 .name = name,
3310 };
3311 struct nfs4_lookup_res res = {
3312 .server = server,
3313 .fattr = fattr,
aa9c2669 3314 .label = label,
2b3de441
DH		 3315 .fh = fhandle,
3316 };
3317 struct rpc_message msg = {
3318 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3319 .rpc_argp = &args,
3320 .rpc_resp = &res,
3321 };
3322
aa9c2669
DQ		 3323 args.bitmask = nfs4_bitmask(server, label);
3324
2b3de441
DH		 3325 nfs_fattr_init(fattr);
3326
1da177e4 3327 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3328 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3329 dprintk("NFS reply lookup: %d\n", status);
3330 return status;
3331}
3332
72de53ec 3333static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3334{
7ebb9315 3335 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3336 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3337 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3338 fattr->nlink = 2;
3339}
3340
72de53ec
BS		 3341static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3342 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3343 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3344{
3345 struct nfs4_exception exception = { };
72de53ec 3346 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3347 int err;
3348 do {
1775fd3e 3349 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3350 trace_nfs4_lookup(dir, name, err);
72de53ec 3351 switch (err) {
08ef7bd3 3352 case -NFS4ERR_BADNAME:
72de53ec
BS		 3353 err = -ENOENT;
3354 goto out;
0c2e53f1 3355 case -NFS4ERR_MOVED:
f05d147f 3356 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3357 goto out;
0c2e53f1 3358 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3359 err = -EPERM;
3360 if (client != *clnt)
3361 goto out;
66b06860 3362 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3363 if (IS_ERR(client))
3364 return PTR_ERR(client);
3365
3366 exception.retry = 1;
3367 break;
3368 default:
3369 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3370 }
1da177e4 3371 } while (exception.retry);
72de53ec
BS		 3372
3373out:
3374 if (err == 0)
3375 *clnt = client;
3376 else if (client != *clnt)
3377 rpc_shutdown_client(client);
3378
1da177e4
LT		 3379 return err;
3380}
3381
80a16b21 3382static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3383 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3384 struct nfs4_label *label)
72de53ec
BS		 3385{
3386 int status;
3387 struct rpc_clnt *client = NFS_CLIENT(dir);
3388
1775fd3e 3389 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3390 if (client != NFS_CLIENT(dir)) {
3391 rpc_shutdown_client(client);
3392 nfs_fixup_secinfo_attributes(fattr);
3393 }
3394 return status;
3395}
3396
f05d147f
BS		 3397struct rpc_clnt *
3398nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3399 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3400{
b72888cb 3401 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3402 int status;
f05d147f 3403
1775fd3e 3404 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3405 if (status < 0)
f05d147f 3406 return ERR_PTR(status);
b72888cb 3407 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3408}
3409
1da177e4
LT		 3410static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3411{
76b32999 3412 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3413 struct nfs4_accessargs args = {
3414 .fh = NFS_FH(inode),
a4980e78 3415 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3416 };
3417 struct nfs4_accessres res = {
3418 .server = server,
1da177e4 3419 };
1da177e4
LT		 3420 struct rpc_message msg = {
3421 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3422 .rpc_argp = &args,
3423 .rpc_resp = &res,
3424 .rpc_cred = entry->cred,
3425 };
3426 int mode = entry->mask;
aa9c2669 3427 int status = 0;
1da177e4
LT		 3428
3429 /*
3430 * Determine which access bits we want to ask for...
3431 */
3432 if (mode & MAY_READ)
3433 args.access |= NFS4_ACCESS_READ;
3434 if (S_ISDIR(inode->i_mode)) {
3435 if (mode & MAY_WRITE)
3436 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3437 if (mode & MAY_EXEC)
3438 args.access |= NFS4_ACCESS_LOOKUP;
3439 } else {
3440 if (mode & MAY_WRITE)
3441 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3442 if (mode & MAY_EXEC)
3443 args.access |= NFS4_ACCESS_EXECUTE;
3444 }
c407d41a
TM		 3445
3446 res.fattr = nfs_alloc_fattr();
3447 if (res.fattr == NULL)
3448 return -ENOMEM;
3449
7c513058 3450 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3451 if (!status) {
6168f62c 3452 nfs_access_set_mask(entry, res.access);
c407d41a 3453 nfs_refresh_inode(inode, res.fattr);
1da177e4 3454 }
c407d41a 3455 nfs_free_fattr(res.fattr);
1da177e4
LT		 3456 return status;
3457}
3458
3459static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3460{
3461 struct nfs4_exception exception = { };
3462 int err;
3463 do {
c1578b76
TM		 3464 err = _nfs4_proc_access(inode, entry);
3465 trace_nfs4_access(inode, err);
3466 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3467 &exception);
3468 } while (exception.retry);
3469 return err;
3470}
3471
3472/*
3473 * TODO: For the time being, we don't try to get any attributes
3474 * along with any of the zero-copy operations READ, READDIR,
3475 * READLINK, WRITE.
3476 *
3477 * In the case of the first three, we want to put the GETATTR
3478 * after the read-type operation -- this is because it is hard
3479 * to predict the length of a GETATTR response in v4, and thus
3480 * align the READ data correctly. This means that the GETATTR
3481 * may end up partially falling into the page cache, and we should
3482 * shift it into the 'tail' of the xdr_buf before processing.
3483 * To do this efficiently, we need to know the total length
3484 * of data received, which doesn't seem to be available outside
3485 * of the RPC layer.
3486 *
3487 * In the case of WRITE, we also want to put the GETATTR after
3488 * the operation -- in this case because we want to make sure
140150db 3489 * we get the post-operation mtime and size.
1da177e4
LT		 3490 *
3491 * Both of these changes to the XDR layer would in fact be quite
3492 * minor, but I decided to leave them for a subsequent patch.
3493 */
3494static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3495 unsigned int pgbase, unsigned int pglen)
3496{
3497 struct nfs4_readlink args = {
3498 .fh = NFS_FH(inode),
3499 .pgbase = pgbase,
3500 .pglen = pglen,
3501 .pages = &page,
3502 };
f50c7000 3503 struct nfs4_readlink_res res;
1da177e4
LT		 3504 struct rpc_message msg = {
3505 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3506 .rpc_argp = &args,
f50c7000 3507 .rpc_resp = &res,
1da177e4
LT		 3508 };
3509
7c513058 3510 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3511}
3512
3513static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3514 unsigned int pgbase, unsigned int pglen)
3515{
3516 struct nfs4_exception exception = { };
3517 int err;
3518 do {
c1578b76
TM		 3519 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3520 trace_nfs4_readlink(inode, err);
3521 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3522 &exception);
3523 } while (exception.retry);
3524 return err;
3525}
3526
1da177e4 3527/*
8867fe58 3528 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3529 */
1da177e4
LT		 3530static int
3531nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3532 int flags)
1da177e4 3533{
aa9c2669 3534 struct nfs4_label l, *ilabel = NULL;
8867fe58 3535 struct nfs_open_context *ctx;
1da177e4 3536 struct nfs4_state *state;
5bc2afc2 3537 int opened = 0;
1da177e4
LT		 3538 int status = 0;
3539
8867fe58
MS		 3540 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3541 if (IS_ERR(ctx))
3542 return PTR_ERR(ctx);
3543
aa9c2669
DQ		 3544 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3545
a8a5da99 3546 sattr->ia_mode &= ~current_umask();
5bc2afc2 3547 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3548 if (IS_ERR(state)) {
3549 status = PTR_ERR(state);
c0204fd2 3550 goto out;
1da177e4 3551 }
1da177e4 3552out:
aa9c2669 3553 nfs4_label_release_security(ilabel);
8867fe58 3554 put_nfs_open_context(ctx);
1da177e4
LT		 3555 return status;
3556}
3557
3558static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3559{
16e42959 3560 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3561 struct nfs_removeargs args = {
1da177e4 3562 .fh = NFS_FH(dir),
26fe5750 3563 .name = *name,
16e42959 3564 };
4fdc17b2 3565 struct nfs_removeres res = {
16e42959 3566 .server = server,
1da177e4 3567 };
1da177e4 3568 struct rpc_message msg = {
4fdc17b2
TM		 3569 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3570 .rpc_argp = &args,
3571 .rpc_resp = &res,
1da177e4 3572 };
778d2817 3573 int status;
1da177e4 3574
7c513058 3575 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3576 if (status == 0)
16e42959 3577 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3578 return status;
3579}
3580
3581static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3582{
3583 struct nfs4_exception exception = { };
3584 int err;
3585 do {
078ea3df
TM		 3586 err = _nfs4_proc_remove(dir, name);
3587 trace_nfs4_remove(dir, name, err);
3588 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3589 &exception);
3590 } while (exception.retry);
3591 return err;
3592}
3593
e4eff1a6 3594static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3595{
e4eff1a6
TM		 3596 struct nfs_server *server = NFS_SERVER(dir);
3597 struct nfs_removeargs *args = msg->rpc_argp;
3598 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3599
e4eff1a6 3600 res->server = server;
1da177e4 3601 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3602 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3603
3604 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3605}
3606
34e137cc
BS		 3607static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3608{
d9afbd1b
TM		 3609 nfs4_setup_sequence(NFS_SERVER(data->dir),
3610 &data->args.seq_args,
3611 &data->res.seq_res,
3612 task);
1da177e4
LT		 3613}
3614
e4eff1a6 3615static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3616{
078ea3df
TM		 3617 struct nfs_unlinkdata *data = task->tk_calldata;
3618 struct nfs_removeres *res = &data->res;
e4eff1a6 3619
14516c3a
TM		 3620 if (!nfs4_sequence_done(task, &res->seq_res))
3621 return 0;
8478eaa1
N		 3622 if (nfs4_async_handle_error(task, res->server, NULL,
3623 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3624 return 0;
3625 update_changeattr(dir, &res->cinfo);
e4eff1a6 3626 return 1;
1da177e4
LT		 3627}
3628
d3d4152a
JL		 3629static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3630{
3631 struct nfs_server *server = NFS_SERVER(dir);
3632 struct nfs_renameargs *arg = msg->rpc_argp;
3633 struct nfs_renameres *res = msg->rpc_resp;
3634
3635 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3636 res->server = server;
a9c92d6b 3637 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3638}
3639
c6bfa1a1
BS		 3640static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3641{
d9afbd1b
TM		 3642 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3643 &data->args.seq_args,
3644 &data->res.seq_res,
3645 task);
d3d4152a
JL		 3646}
3647
3648static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3649 struct inode *new_dir)
3650{
fbc6f7c2
TM		 3651 struct nfs_renamedata *data = task->tk_calldata;
3652 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3653
3654 if (!nfs4_sequence_done(task, &res->seq_res))
3655 return 0;
8478eaa1 3656 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3657 return 0;
3658
3659 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3660 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3661 return 1;
3662}
3663
1da177e4
LT		 3664static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3665{
91ba2eee 3666 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3667 struct nfs4_link_arg arg = {
3668 .fh = NFS_FH(inode),
3669 .dir_fh = NFS_FH(dir),
3670 .name = name,
91ba2eee
TM		 3671 .bitmask = server->attr_bitmask,
3672 };
91ba2eee
TM		 3673 struct nfs4_link_res res = {
3674 .server = server,
1775fd3e 3675 .label = NULL,
1da177e4 3676 };
1da177e4
LT		 3677 struct rpc_message msg = {
3678 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3679 .rpc_argp = &arg,
91ba2eee 3680 .rpc_resp = &res,
1da177e4 3681 };
136f2627
TM		 3682 int status = -ENOMEM;
3683
3684 res.fattr = nfs_alloc_fattr();
778d2817 3685 if (res.fattr == NULL)
136f2627 3686 goto out;
1da177e4 3687
14c43f76
DQ		 3688 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3689 if (IS_ERR(res.label)) {
3690 status = PTR_ERR(res.label);
3691 goto out;
3692 }
aa9c2669 3693 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3694
7c513058 3695 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3696 if (!status) {
3697 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3698 status = nfs_post_op_update_inode(inode, res.fattr);
3699 if (!status)
3700 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3701 }
14c43f76
DQ		 3702
3703
3704 nfs4_label_free(res.label);
3705
136f2627 3706out:
136f2627 3707 nfs_free_fattr(res.fattr);
1da177e4
LT		 3708 return status;
3709}
3710
3711static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3712{
3713 struct nfs4_exception exception = { };
3714 int err;
3715 do {
3716 err = nfs4_handle_exception(NFS_SERVER(inode),
3717 _nfs4_proc_link(inode, dir, name),
3718 &exception);
3719 } while (exception.retry);
3720 return err;
3721}
3722
57dc9a57
TM		 3723struct nfs4_createdata {
3724 struct rpc_message msg;
3725 struct nfs4_create_arg arg;
3726 struct nfs4_create_res res;
3727 struct nfs_fh fh;
3728 struct nfs_fattr fattr;
1775fd3e 3729 struct nfs4_label *label;
57dc9a57
TM		 3730};
3731
3732static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3733 struct qstr *name, struct iattr *sattr, u32 ftype)
3734{
3735 struct nfs4_createdata *data;
3736
3737 data = kzalloc(sizeof(*data), GFP_KERNEL);
3738 if (data != NULL) {
3739 struct nfs_server *server = NFS_SERVER(dir);
3740
14c43f76
DQ		 3741 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3742 if (IS_ERR(data->label))
3743 goto out_free;
3744
57dc9a57
TM		 3745 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3746 data->msg.rpc_argp = &data->arg;
3747 data->msg.rpc_resp = &data->res;
3748 data->arg.dir_fh = NFS_FH(dir);
3749 data->arg.server = server;
3750 data->arg.name = name;
3751 data->arg.attrs = sattr;
3752 data->arg.ftype = ftype;
aa9c2669 3753 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3754 data->res.server = server;
3755 data->res.fh = &data->fh;
3756 data->res.fattr = &data->fattr;
1775fd3e 3757 data->res.label = data->label;
57dc9a57 3758 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3759 }
3760 return data;
14c43f76
DQ		 3761out_free:
3762 kfree(data);
3763 return NULL;
57dc9a57
TM		 3764}
3765
3766static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3767{
7c513058 3768 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3769 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3770 if (status == 0) {
3771 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3772 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3773 }
3774 return status;
3775}
3776
3777static void nfs4_free_createdata(struct nfs4_createdata *data)
3778{
14c43f76 3779 nfs4_label_free(data->label);
57dc9a57
TM		 3780 kfree(data);
3781}
3782
4f390c15 3783static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3784 struct page *page, unsigned int len, struct iattr *sattr,
3785 struct nfs4_label *label)
1da177e4 3786{
57dc9a57
TM		 3787 struct nfs4_createdata *data;
3788 int status = -ENAMETOOLONG;
1da177e4 3789
94a6d753 3790 if (len > NFS4_MAXPATHLEN)
57dc9a57 3791 goto out;
4f390c15 3792
57dc9a57
TM		 3793 status = -ENOMEM;
3794 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3795 if (data == NULL)
3796 goto out;
3797
3798 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3799 data->arg.u.symlink.pages = &page;
3800 data->arg.u.symlink.len = len;
1775fd3e 3801 data->arg.label = label;
1da177e4 3802
57dc9a57
TM		 3803 status = nfs4_do_create(dir, dentry, data);
3804
3805 nfs4_free_createdata(data);
3806out:
1da177e4
LT		 3807 return status;
3808}
3809
4f390c15 3810static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3811 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3812{
3813 struct nfs4_exception exception = { };
aa9c2669 3814 struct nfs4_label l, *label = NULL;
1da177e4 3815 int err;
aa9c2669
DQ		 3816
3817 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3818
1da177e4 3819 do {
078ea3df
TM		 3820 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3821 trace_nfs4_symlink(dir, &dentry->d_name, err);
3822 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3823 &exception);
3824 } while (exception.retry);
aa9c2669
DQ		 3825
3826 nfs4_label_release_security(label);
1da177e4
LT		 3827 return err;
3828}
3829
3830static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3831 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3832{
57dc9a57
TM		 3833 struct nfs4_createdata *data;
3834 int status = -ENOMEM;
1da177e4 3835
57dc9a57
TM		 3836 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3837 if (data == NULL)
3838 goto out;
3839
1775fd3e 3840 data->arg.label = label;
57dc9a57
TM		 3841 status = nfs4_do_create(dir, dentry, data);
3842
3843 nfs4_free_createdata(data);
3844out:
1da177e4
LT		 3845 return status;
3846}
3847
3848static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3849 struct iattr *sattr)
3850{
3851 struct nfs4_exception exception = { };
aa9c2669 3852 struct nfs4_label l, *label = NULL;
1da177e4 3853 int err;
a8a5da99 3854
aa9c2669
DQ		 3855 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3856
a8a5da99 3857 sattr->ia_mode &= ~current_umask();
1da177e4 3858 do {
078ea3df
TM		 3859 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3860 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3861 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3862 &exception);
3863 } while (exception.retry);
aa9c2669
DQ		 3864 nfs4_label_release_security(label);
3865
1da177e4
LT		 3866 return err;
3867}
3868
3869static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3870 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 3871{
2b0143b5 3872 struct inode *dir = d_inode(dentry);
1da177e4
LT		 3873 struct nfs4_readdir_arg args = {
3874 .fh = NFS_FH(dir),
56e4ebf8 3875 .pages = pages,
1da177e4
LT		 3876 .pgbase = 0,
3877 .count = count,
2b0143b5 3878 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 3879 .plus = plus,
1da177e4
LT		 3880 };
3881 struct nfs4_readdir_res res;
3882 struct rpc_message msg = {
3883 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3884 .rpc_argp = &args,
3885 .rpc_resp = &res,
3886 .rpc_cred = cred,
3887 };
3888 int status;
3889
6de1472f
AV		 3890 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3891 dentry,
eadf4598 3892 (unsigned long long)cookie);
c3f52af3 3893 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3894 res.pgbase = args.pgbase;
7c513058 3895 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3896 if (status >= 0) {
c3f52af3 3897 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3898 status += args.pgbase;
3899 }
c4812998
TM		 3900
3901 nfs_invalidate_atime(dir);
3902
3110ff80 3903 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3904 return status;
3905}
3906
3907static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3908 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3909{
3910 struct nfs4_exception exception = { };
3911 int err;
3912 do {
c1578b76
TM		 3913 err = _nfs4_proc_readdir(dentry, cred, cookie,
3914 pages, count, plus);
2b0143b5
DH		 3915 trace_nfs4_readdir(d_inode(dentry), err);
3916 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 3917 &exception);
3918 } while (exception.retry);
3919 return err;
3920}
3921
3922static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3923 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3924{
57dc9a57
TM		 3925 struct nfs4_createdata *data;
3926 int mode = sattr->ia_mode;
3927 int status = -ENOMEM;
1da177e4 3928
57dc9a57
TM		 3929 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3930 if (data == NULL)
3931 goto out;
3932
1da177e4 3933 if (S_ISFIFO(mode))
57dc9a57 3934 data->arg.ftype = NF4FIFO;
1da177e4 3935 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3936 data->arg.ftype = NF4BLK;
3937 data->arg.u.device.specdata1 = MAJOR(rdev);
3938 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3939 }
3940 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3941 data->arg.ftype = NF4CHR;
3942 data->arg.u.device.specdata1 = MAJOR(rdev);
3943 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3944 } else if (!S_ISSOCK(mode)) {
3945 status = -EINVAL;
3946 goto out_free;
1da177e4 3947 }
1775fd3e 3948
aa9c2669 3949 data->arg.label = label;
57dc9a57 3950 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3951out_free:
57dc9a57
TM		 3952 nfs4_free_createdata(data);
3953out:
1da177e4
LT		 3954 return status;
3955}
3956
3957static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3958 struct iattr *sattr, dev_t rdev)
3959{
3960 struct nfs4_exception exception = { };
aa9c2669 3961 struct nfs4_label l, *label = NULL;
1da177e4 3962 int err;
a8a5da99 3963
aa9c2669
DQ		 3964 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3965
a8a5da99 3966 sattr->ia_mode &= ~current_umask();
1da177e4 3967 do {
078ea3df
TM		 3968 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3969 trace_nfs4_mknod(dir, &dentry->d_name, err);
3970 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3971 &exception);
3972 } while (exception.retry);
aa9c2669
DQ		 3973
3974 nfs4_label_release_security(label);
3975
1da177e4
LT		 3976 return err;
3977}
3978
3979static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3980 struct nfs_fsstat *fsstat)
3981{
3982 struct nfs4_statfs_arg args = {
3983 .fh = fhandle,
3984 .bitmask = server->attr_bitmask,
3985 };
24ad148a
BH		 3986 struct nfs4_statfs_res res = {
3987 .fsstat = fsstat,
3988 };
1da177e4
LT		 3989 struct rpc_message msg = {
3990 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3991 .rpc_argp = &args,
24ad148a 3992 .rpc_resp = &res,
1da177e4
LT		 3993 };
3994
0e574af1 3995 nfs_fattr_init(fsstat->fattr);
7c513058 3996 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3997}
3998
3999static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4000{
4001 struct nfs4_exception exception = { };
4002 int err;
4003 do {
4004 err = nfs4_handle_exception(server,
4005 _nfs4_proc_statfs(server, fhandle, fsstat),
4006 &exception);
4007 } while (exception.retry);
4008 return err;
4009}
4010
4011static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4012 struct nfs_fsinfo *fsinfo)
4013{
4014 struct nfs4_fsinfo_arg args = {
4015 .fh = fhandle,
4016 .bitmask = server->attr_bitmask,
4017 };
3dda5e43
BH		 4018 struct nfs4_fsinfo_res res = {
4019 .fsinfo = fsinfo,
4020 };
1da177e4
LT		 4021 struct rpc_message msg = {
4022 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4023 .rpc_argp = &args,
3dda5e43 4024 .rpc_resp = &res,
1da177e4
LT		 4025 };
4026
7c513058 4027 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4028}
4029
4030static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4031{
4032 struct nfs4_exception exception = { };
83ca7f5a 4033 unsigned long now = jiffies;
1da177e4
LT		 4034 int err;
4035
4036 do {
83ca7f5a 4037 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4038 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4039 if (err == 0) {
4040 struct nfs_client *clp = server->nfs_client;
4041
4042 spin_lock(&clp->cl_lock);
4043 clp->cl_lease_time = fsinfo->lease_time * HZ;
4044 clp->cl_last_renewal = now;
4045 spin_unlock(&clp->cl_lock);
4046 break;
4047 }
4048 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4049 } while (exception.retry);
4050 return err;
4051}
4052
4053static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4054{
e38eb650
BS		 4055 int error;
4056
0e574af1 4057 nfs_fattr_init(fsinfo->fattr);
e38eb650 4058 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4059 if (error == 0) {
4060 /* block layout checks this! */
4061 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4062 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4063 }
e38eb650
BS		 4064
4065 return error;
1da177e4
LT		 4066}
4067
4068static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4069 struct nfs_pathconf *pathconf)
4070{
4071 struct nfs4_pathconf_arg args = {
4072 .fh = fhandle,
4073 .bitmask = server->attr_bitmask,
4074 };
d45b2989
BH		 4075 struct nfs4_pathconf_res res = {
4076 .pathconf = pathconf,
4077 };
1da177e4
LT		 4078 struct rpc_message msg = {
4079 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4080 .rpc_argp = &args,
d45b2989 4081 .rpc_resp = &res,
1da177e4
LT		 4082 };
4083
4084 /* None of the pathconf attributes are mandatory to implement */
4085 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4086 memset(pathconf, 0, sizeof(*pathconf));
4087 return 0;
4088 }
4089
0e574af1 4090 nfs_fattr_init(pathconf->fattr);
7c513058 4091 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4092}
4093
4094static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4095 struct nfs_pathconf *pathconf)
4096{
4097 struct nfs4_exception exception = { };
4098 int err;
4099
4100 do {
4101 err = nfs4_handle_exception(server,
4102 _nfs4_proc_pathconf(server, fhandle, pathconf),
4103 &exception);
4104 } while (exception.retry);
4105 return err;
4106}
4107
5521abfd 4108int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4109 const struct nfs_open_context *ctx,
4110 const struct nfs_lock_context *l_ctx,
4111 fmode_t fmode)
4112{
4113 const struct nfs_lockowner *lockowner = NULL;
4114
4115 if (l_ctx != NULL)
4116 lockowner = &l_ctx->lockowner;
5521abfd 4117 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4118}
4119EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4120
5521abfd
TM		 4121static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4122 const struct nfs_open_context *ctx,
4123 const struct nfs_lock_context *l_ctx,
4124 fmode_t fmode)
4125{
4126 nfs4_stateid current_stateid;
4127
e1253be0
TM		 4128 /* If the current stateid represents a lost lock, then exit */
4129 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4130 return true;
5521abfd
TM		 4131 return nfs4_stateid_match(stateid, &current_stateid);
4132}
4133
4134static bool nfs4_error_stateid_expired(int err)
4135{
4136 switch (err) {
4137 case -NFS4ERR_DELEG_REVOKED:
4138 case -NFS4ERR_ADMIN_REVOKED:
4139 case -NFS4ERR_BAD_STATEID:
4140 case -NFS4ERR_STALE_STATEID:
4141 case -NFS4ERR_OLD_STATEID:
4142 case -NFS4ERR_OPENMODE:
4143 case -NFS4ERR_EXPIRED:
4144 return true;
4145 }
4146 return false;
4147}
4148
d45f60c6 4149void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4150{
d45f60c6 4151 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4152}
4153
d45f60c6 4154static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4155{
d45f60c6 4156 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4157
d45f60c6
WAA		 4158 trace_nfs4_read(hdr, task->tk_status);
4159 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4160 hdr->args.context->state,
4161 NULL) == -EAGAIN) {
d00c5d43 4162 rpc_restart_call_prepare(task);
ec06c096 4163 return -EAGAIN;
1da177e4 4164 }
8850df99 4165
d45f60c6 4166 __nfs4_read_done_cb(hdr);
1da177e4 4167 if (task->tk_status > 0)
d45f60c6 4168 renew_lease(server, hdr->timestamp);
ec06c096 4169 return 0;
1da177e4
LT		 4170}
4171
5521abfd 4172static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4173 struct nfs_pgio_args *args)
5521abfd
TM		 4174{
4175
4176 if (!nfs4_error_stateid_expired(task->tk_status) ||
4177 nfs4_stateid_is_current(&args->stateid,
4178 args->context,
4179 args->lock_context,
4180 FMODE_READ))
4181 return false;
4182 rpc_restart_call_prepare(task);
4183 return true;
4184}
4185
d45f60c6 4186static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4187{
4188
4189 dprintk("--> %s\n", __func__);
4190
d45f60c6 4191 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4192 return -EAGAIN;
d45f60c6 4193 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4194 return -EAGAIN;
d45f60c6
WAA		 4195 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4196 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4197}
4198
d45f60c6
WAA		 4199static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4200 struct rpc_message *msg)
1da177e4 4201{
d45f60c6
WAA		 4202 hdr->timestamp = jiffies;
4203 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4204 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4205 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4206}
4207
d45f60c6
WAA		 4208static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4209 struct nfs_pgio_header *hdr)
ea7c3303 4210{
d45f60c6
WAA		 4211 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4212 &hdr->args.seq_args,
4213 &hdr->res.seq_res,
9b206149 4214 task))
ef1820f9 4215 return 0;
d45f60c6
WAA		 4216 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4217 hdr->args.lock_context,
4218 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4219 return -EIO;
d45f60c6 4220 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4221 return -EIO;
4222 return 0;
1da177e4
LT		 4223}
4224
d45f60c6
WAA		 4225static int nfs4_write_done_cb(struct rpc_task *task,
4226 struct nfs_pgio_header *hdr)
1da177e4 4227{
d45f60c6 4228 struct inode *inode = hdr->inode;
8478eaa1 4229
d45f60c6
WAA		 4230 trace_nfs4_write(hdr, task->tk_status);
4231 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4232 hdr->args.context->state,
4233 NULL) == -EAGAIN) {
d00c5d43 4234 rpc_restart_call_prepare(task);
788e7a89 4235 return -EAGAIN;
1da177e4 4236 }
4f9838c7 4237 if (task->tk_status >= 0) {
d45f60c6 4238 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4239 nfs_writeback_update_inode(hdr);
4f9838c7 4240 }
788e7a89 4241 return 0;
1da177e4
LT		 4242}
4243
5521abfd 4244static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4245 struct nfs_pgio_args *args)
5521abfd
TM		 4246{
4247
4248 if (!nfs4_error_stateid_expired(task->tk_status) ||
4249 nfs4_stateid_is_current(&args->stateid,
4250 args->context,
4251 args->lock_context,
4252 FMODE_WRITE))
4253 return false;
4254 rpc_restart_call_prepare(task);
4255 return true;
4256}
4257
d45f60c6 4258static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4259{
d45f60c6 4260 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4261 return -EAGAIN;
d45f60c6 4262 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4263 return -EAGAIN;
d45f60c6
WAA		 4264 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4265 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4266}
4267
5a37f851 4268static
d45f60c6 4269bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4270{
5a37f851 4271 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4272 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4273 return false;
4274 /* Otherwise, request attributes if and only if we don't hold
4275 * a delegation
4276 */
011e2a7f 4277 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4278}
a69aef14 4279
d45f60c6
WAA		 4280static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4281 struct rpc_message *msg)
1da177e4 4282{
d45f60c6 4283 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4284
d45f60c6
WAA		 4285 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4286 hdr->args.bitmask = NULL;
4287 hdr->res.fattr = NULL;
7ffd1064 4288 } else
d45f60c6 4289 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4290
d45f60c6
WAA		 4291 if (!hdr->pgio_done_cb)
4292 hdr->pgio_done_cb = nfs4_write_done_cb;
4293 hdr->res.server = server;
4294 hdr->timestamp = jiffies;
1da177e4 4295
bdc7f021 4296 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4297 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4298}
4299
0b7c0153 4300static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4301{
d9afbd1b
TM		 4302 nfs4_setup_sequence(NFS_SERVER(data->inode),
4303 &data->args.seq_args,
4304 &data->res.seq_res,
4305 task);
1da177e4
LT		 4306}
4307
0b7c0153 4308static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4309{
1da177e4 4310 struct inode *inode = data->inode;
14516c3a 4311
cc668ab3 4312 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4313 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4314 NULL, NULL) == -EAGAIN) {
d00c5d43 4315 rpc_restart_call_prepare(task);
788e7a89 4316 return -EAGAIN;
1da177e4 4317 }
788e7a89 4318 return 0;
1da177e4
LT		 4319}
4320
0b7c0153 4321static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4322{
4323 if (!nfs4_sequence_done(task, &data->res.seq_res))
4324 return -EAGAIN;
0b7c0153 4325 return data->commit_done_cb(task, data);
5f452431
FI		 4326}
4327
0b7c0153 4328static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4329{
788e7a89 4330 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4331
0b7c0153
FI		 4332 if (data->commit_done_cb == NULL)
4333 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4334 data->res.server = server;
bdc7f021 4335 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4336 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4337}
4338
9bc4e3ca
CL		 4339struct nfs4_renewdata {
4340 struct nfs_client *client;
4341 unsigned long timestamp;
4342};
4343
1da177e4
LT		 4344/*
4345 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4346 * standalone procedure for queueing an asynchronous RENEW.
4347 */
9bc4e3ca 4348static void nfs4_renew_release(void *calldata)
dc96aef9 4349{
9bc4e3ca
CL		 4350 struct nfs4_renewdata *data = calldata;
4351 struct nfs_client *clp = data->client;
dc96aef9 4352
0851de06
AB		 4353 if (atomic_read(&clp->cl_count) > 1)
4354 nfs4_schedule_state_renewal(clp);
4355 nfs_put_client(clp);
9bc4e3ca 4356 kfree(data);
dc96aef9
AB		 4357}
4358
9bc4e3ca 4359static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4360{
9bc4e3ca
CL		 4361 struct nfs4_renewdata *data = calldata;
4362 struct nfs_client *clp = data->client;
4363 unsigned long timestamp = data->timestamp;
1da177e4 4364
c6d01c6f 4365 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4366 switch (task->tk_status) {
4367 case 0:
4368 break;
4369 case -NFS4ERR_LEASE_MOVED:
4370 nfs4_schedule_lease_moved_recovery(clp);
4371 break;
4372 default:
95baa25c 4373 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4374 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4375 return;
4376 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4377 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4378 return;
4379 }
4380 nfs4_schedule_path_down_recovery(clp);
1da177e4 4381 }
452e9352 4382 do_renew_lease(clp, timestamp);
1da177e4
LT		 4383}
4384
963d8fe5
TM		 4385static const struct rpc_call_ops nfs4_renew_ops = {
4386 .rpc_call_done = nfs4_renew_done,
dc96aef9 4387 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4388};
4389
2f60ea6b 4390static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4391{
4392 struct rpc_message msg = {
4393 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4394 .rpc_argp = clp,
b4454fe1 4395 .rpc_cred = cred,
1da177e4 4396 };
9bc4e3ca 4397 struct nfs4_renewdata *data;
1da177e4 4398
2f60ea6b
TM		 4399 if (renew_flags == 0)
4400 return 0;
0851de06
AB		 4401 if (!atomic_inc_not_zero(&clp->cl_count))
4402 return -EIO;
b569ad34 4403 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4404 if (data == NULL)
4405 return -ENOMEM;
4406 data->client = clp;
4407 data->timestamp = jiffies;
bc7a05ca 4408 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4409 &nfs4_renew_ops, data);
1da177e4
LT		 4410}
4411
8534d4ec 4412static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4413{
4414 struct rpc_message msg = {
4415 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4416 .rpc_argp = clp,
b4454fe1 4417 .rpc_cred = cred,
1da177e4
LT		 4418 };
4419 unsigned long now = jiffies;
4420 int status;
4421
bc7a05ca 4422 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4423 if (status < 0)
4424 return status;
452e9352 4425 do_renew_lease(clp, now);
1da177e4
LT		 4426 return 0;
4427}
4428
aa1870af
BF		 4429static inline int nfs4_server_supports_acls(struct nfs_server *server)
4430{
7dd7d959 4431 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4432}
4433
21f498c2
TM		 4434/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4435 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4436 * the stack.
4437 */
21f498c2 4438#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4439
e9e3d724
NH		 4440static int buf_to_pages_noslab(const void *buf, size_t buflen,
4441 struct page **pages, unsigned int *pgbase)
4442{
4443 struct page *newpage, **spages;
4444 int rc = 0;
4445 size_t len;
4446 spages = pages;
4447
4448 do {
21f498c2 4449 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4450 newpage = alloc_page(GFP_KERNEL);
4451
4452 if (newpage == NULL)
4453 goto unwind;
4454 memcpy(page_address(newpage), buf, len);
4455 buf += len;
4456 buflen -= len;
4457 *pages++ = newpage;
4458 rc++;
4459 } while (buflen != 0);
4460
4461 return rc;
4462
4463unwind:
4464 for(; rc > 0; rc--)
4465 __free_page(spages[rc-1]);
4466 return -ENOMEM;
4467}
4468
e50a1c2e
BF		 4469struct nfs4_cached_acl {
4470 int cached;
4471 size_t len;
3e9d4154 4472 char data[0];
e50a1c2e
BF		 4473};
4474
4475static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4476{
4477 struct nfs_inode *nfsi = NFS_I(inode);
4478
4479 spin_lock(&inode->i_lock);
4480 kfree(nfsi->nfs4_acl);
4481 nfsi->nfs4_acl = acl;
4482 spin_unlock(&inode->i_lock);
4483}
4484
4485static void nfs4_zap_acl_attr(struct inode *inode)
4486{
4487 nfs4_set_cached_acl(inode, NULL);
4488}
4489
4490static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4491{
4492 struct nfs_inode *nfsi = NFS_I(inode);
4493 struct nfs4_cached_acl *acl;
4494 int ret = -ENOENT;
4495
4496 spin_lock(&inode->i_lock);
4497 acl = nfsi->nfs4_acl;
4498 if (acl == NULL)
4499 goto out;
4500 if (buf == NULL) /* user is just asking for length */
4501 goto out_len;
4502 if (acl->cached == 0)
4503 goto out;
4504 ret = -ERANGE; /* see getxattr(2) man page */
4505 if (acl->len > buflen)
4506 goto out;
4507 memcpy(buf, acl->data, acl->len);
4508out_len:
4509 ret = acl->len;
4510out:
4511 spin_unlock(&inode->i_lock);
4512 return ret;
4513}
4514
5794d21e 4515static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4516{
4517 struct nfs4_cached_acl *acl;
b291f1b1 4518 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4519
1f1ea6c2 4520 if (buflen <= PAGE_SIZE) {
b291f1b1 4521 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4522 if (acl == NULL)
4523 goto out;
4524 acl->cached = 1;
5794d21e 4525 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4526 } else {
4527 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4528 if (acl == NULL)
4529 goto out;
4530 acl->cached = 0;
4531 }
4532 acl->len = acl_len;
4533out:
4534 nfs4_set_cached_acl(inode, acl);
4535}
4536
bf118a34
AA		 4537/*
4538 * The getxattr API returns the required buffer length when called with a
4539 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4540 * the required buf. On a NULL buf, we send a page of data to the server
4541 * guessing that the ACL request can be serviced by a page. If so, we cache
4542 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4543 * the cache. If not so, we throw away the page, and cache the required
4544 * length. The next getxattr call will then produce another round trip to
4545 * the server, this time with the input buf of the required size.
4546 */
16b4289c 4547static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4548{
bf118a34 4549 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4550 struct nfs_getaclargs args = {
4551 .fh = NFS_FH(inode),
4552 .acl_pages = pages,
4553 .acl_len = buflen,
4554 };
663c79b3
BH		 4555 struct nfs_getaclres res = {
4556 .acl_len = buflen,
4557 };
aa1870af
BF		 4558 struct rpc_message msg = {
4559 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4560 .rpc_argp = &args,
663c79b3 4561 .rpc_resp = &res,
aa1870af 4562 };
21f498c2
TM		 4563 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4564 int ret = -ENOMEM, i;
aa1870af 4565
bf118a34
AA		 4566 /* As long as we're doing a round trip to the server anyway,
4567 * let's be prepared for a page of acl data. */
4568 if (npages == 0)
4569 npages = 1;
21f498c2
TM		 4570 if (npages > ARRAY_SIZE(pages))
4571 return -ERANGE;
5a006899 4572
bf118a34
AA		 4573 for (i = 0; i < npages; i++) {
4574 pages[i] = alloc_page(GFP_KERNEL);
4575 if (!pages[i])
4576 goto out_free;
e50a1c2e 4577 }
5a006899
SP		 4578
4579 /* for decoding across pages */
4580 res.acl_scratch = alloc_page(GFP_KERNEL);
4581 if (!res.acl_scratch)
4582 goto out_free;
4583
bf118a34
AA		 4584 args.acl_len = npages * PAGE_SIZE;
4585 args.acl_pgbase = 0;
5a006899 4586
de040bec 4587 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4588 __func__, buf, buflen, npages, args.acl_len);
4589 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4590 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4591 if (ret)
4592 goto out_free;
bf118a34 4593
1f1ea6c2
TM		 4594 /* Handle the case where the passed-in buffer is too short */
4595 if (res.acl_flags & NFS4_ACL_TRUNC) {
4596 /* Did the user only issue a request for the acl length? */
4597 if (buf == NULL)
4598 goto out_ok;
e50a1c2e 4599 ret = -ERANGE;
1f1ea6c2 4600 goto out_free;
e50a1c2e 4601 }
1f1ea6c2 4602 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4603 if (buf) {
4604 if (res.acl_len > buflen) {
4605 ret = -ERANGE;
4606 goto out_free;
4607 }
1f1ea6c2 4608 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4609 }
1f1ea6c2
TM		 4610out_ok:
4611 ret = res.acl_len;
e50a1c2e 4612out_free:
bf118a34
AA		 4613 for (i = 0; i < npages; i++)
4614 if (pages[i])
4615 __free_page(pages[i]);
331818f1
TM		 4616 if (res.acl_scratch)
4617 __free_page(res.acl_scratch);
aa1870af
BF		 4618 return ret;
4619}
4620
16b4289c
TM		 4621static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4622{
4623 struct nfs4_exception exception = { };
4624 ssize_t ret;
4625 do {
4626 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4627 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4628 if (ret >= 0)
4629 break;
4630 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4631 } while (exception.retry);
4632 return ret;
4633}
4634
e50a1c2e
BF		 4635static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4636{
4637 struct nfs_server *server = NFS_SERVER(inode);
4638 int ret;
4639
4640 if (!nfs4_server_supports_acls(server))
4641 return -EOPNOTSUPP;
4642 ret = nfs_revalidate_inode(server, inode);
4643 if (ret < 0)
4644 return ret;
08a22b39
AK		 4645 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4646 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4647 ret = nfs4_read_cached_acl(inode, buf, buflen);
4648 if (ret != -ENOENT)
bf118a34
AA		 4649 /* -ENOENT is returned if there is no ACL or if there is an ACL
4650 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4651 return ret;
4652 return nfs4_get_acl_uncached(inode, buf, buflen);
4653}
4654
16b4289c 4655static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4656{
4657 struct nfs_server *server = NFS_SERVER(inode);
4658 struct page *pages[NFS4ACL_MAXPAGES];
4659 struct nfs_setaclargs arg = {
4660 .fh = NFS_FH(inode),
4661 .acl_pages = pages,
4662 .acl_len = buflen,
4663 };
73c403a9 4664 struct nfs_setaclres res;
4b580ee3
BF		 4665 struct rpc_message msg = {
4666 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4667 .rpc_argp = &arg,
73c403a9 4668 .rpc_resp = &res,
4b580ee3 4669 };
21f498c2 4670 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4671 int ret, i;
4b580ee3
BF		 4672
4673 if (!nfs4_server_supports_acls(server))
4674 return -EOPNOTSUPP;
21f498c2
TM		 4675 if (npages > ARRAY_SIZE(pages))
4676 return -ERANGE;
e9e3d724
NH		 4677 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4678 if (i < 0)
4679 return i;
57ec14c5 4680 nfs4_inode_return_delegation(inode);
7c513058 4681 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4682
4683 /*
4684 * Free each page after tx, so the only ref left is
4685 * held by the network stack
4686 */
4687 for (; i > 0; i--)
4688 put_page(pages[i-1]);
4689
08a22b39
AK		 4690 /*
4691 * Acl update can result in inode attribute update.
4692 * so mark the attribute cache invalid.
4693 */
4694 spin_lock(&inode->i_lock);
4695 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4696 spin_unlock(&inode->i_lock);
f41f7418
TM		 4697 nfs_access_zap_cache(inode);
4698 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4699 return ret;
4700}
4701
16b4289c
TM		 4702static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4703{
4704 struct nfs4_exception exception = { };
4705 int err;
4706 do {
c1578b76
TM		 4707 err = __nfs4_proc_set_acl(inode, buf, buflen);
4708 trace_nfs4_set_acl(inode, err);
4709 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4710 &exception);
4711 } while (exception.retry);
4712 return err;
4713}
4714
aa9c2669
DQ		 4715#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4716static int _nfs4_get_security_label(struct inode *inode, void *buf,
4717 size_t buflen)
4718{
4719 struct nfs_server *server = NFS_SERVER(inode);
4720 struct nfs_fattr fattr;
4721 struct nfs4_label label = {0, 0, buflen, buf};
4722
4723 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4724 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4725 .fh = NFS_FH(inode),
4726 .bitmask = bitmask,
4727 };
4728 struct nfs4_getattr_res res = {
4729 .fattr = &fattr,
4730 .label = &label,
4731 .server = server,
4732 };
4733 struct rpc_message msg = {
4734 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4735 .rpc_argp = &arg,
aa9c2669
DQ		 4736 .rpc_resp = &res,
4737 };
4738 int ret;
4739
4740 nfs_fattr_init(&fattr);
4741
fcb63a9b 4742 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4743 if (ret)
4744 return ret;
4745 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4746 return -ENOENT;
4747 if (buflen < label.len)
4748 return -ERANGE;
4749 return 0;
4750}
4751
4752static int nfs4_get_security_label(struct inode *inode, void *buf,
4753 size_t buflen)
4754{
4755 struct nfs4_exception exception = { };
4756 int err;
4757
4758 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4759 return -EOPNOTSUPP;
4760
4761 do {
c1578b76
TM		 4762 err = _nfs4_get_security_label(inode, buf, buflen);
4763 trace_nfs4_get_security_label(inode, err);
4764 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4765 &exception);
4766 } while (exception.retry);
4767 return err;
4768}
4769
4770static int _nfs4_do_set_security_label(struct inode *inode,
4771 struct nfs4_label *ilabel,
4772 struct nfs_fattr *fattr,
4773 struct nfs4_label *olabel)
4774{
4775
4776 struct iattr sattr = {0};
4777 struct nfs_server *server = NFS_SERVER(inode);
4778 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4779 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4780 .fh = NFS_FH(inode),
4781 .iap = &sattr,
4782 .server = server,
4783 .bitmask = bitmask,
4784 .label = ilabel,
4785 };
4786 struct nfs_setattrres res = {
4787 .fattr = fattr,
4788 .label = olabel,
4789 .server = server,
4790 };
4791 struct rpc_message msg = {
4792 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4793 .rpc_argp = &arg,
aa9c2669
DQ		 4794 .rpc_resp = &res,
4795 };
4796 int status;
4797
12207f69 4798 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4799
12207f69 4800 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4801 if (status)
4802 dprintk("%s failed: %d\n", __func__, status);
4803
4804 return status;
4805}
4806
4807static int nfs4_do_set_security_label(struct inode *inode,
4808 struct nfs4_label *ilabel,
4809 struct nfs_fattr *fattr,
4810 struct nfs4_label *olabel)
4811{
4812 struct nfs4_exception exception = { };
4813 int err;
4814
4815 do {
c1578b76
TM		 4816 err = _nfs4_do_set_security_label(inode, ilabel,
4817 fattr, olabel);
4818 trace_nfs4_set_security_label(inode, err);
4819 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4820 &exception);
4821 } while (exception.retry);
4822 return err;
4823}
4824
4825static int
4826nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4827{
4828 struct nfs4_label ilabel, *olabel = NULL;
4829 struct nfs_fattr fattr;
4830 struct rpc_cred *cred;
2b0143b5 4831 struct inode *inode = d_inode(dentry);
aa9c2669
DQ		 4832 int status;
4833
4834 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4835 return -EOPNOTSUPP;
4836
4837 nfs_fattr_init(&fattr);
4838
4839 ilabel.pi = 0;
4840 ilabel.lfs = 0;
4841 ilabel.label = (char *)buf;
4842 ilabel.len = buflen;
4843
4844 cred = rpc_lookup_cred();
4845 if (IS_ERR(cred))
4846 return PTR_ERR(cred);
4847
4848 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4849 if (IS_ERR(olabel)) {
4850 status = -PTR_ERR(olabel);
4851 goto out;
4852 }
4853
4854 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4855 if (status == 0)
4856 nfs_setsecurity(inode, &fattr, olabel);
4857
4858 nfs4_label_free(olabel);
4859out:
4860 put_rpccred(cred);
4861 return status;
4862}
4863#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4864
4865
1da177e4 4866static int
8478eaa1
N		 4867nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4868 struct nfs4_state *state, long *timeout)
1da177e4 4869{
aa5190d0
TM		 4870 struct nfs_client *clp = server->nfs_client;
4871
4872 if (task->tk_status >= 0)
1da177e4
LT		 4873 return 0;
4874 switch(task->tk_status) {
a1d0b5ee 4875 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4876 case -NFS4ERR_ADMIN_REVOKED:
4877 case -NFS4ERR_BAD_STATEID:
4878 case -NFS4ERR_OPENMODE:
4879 if (state == NULL)
4880 break;
5d422301 4881 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4882 goto recovery_failed;
0400a6b0 4883 goto wait_on_recovery;
0ced63d1 4884 case -NFS4ERR_EXPIRED:
5d422301
TM		 4885 if (state != NULL) {
4886 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4887 goto recovery_failed;
5d422301 4888 }
1da177e4 4889 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4890 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4891 nfs4_schedule_lease_recovery(clp);
4892 goto wait_on_recovery;
519ae255
CL		 4893 case -NFS4ERR_MOVED:
4894 if (nfs4_schedule_migration_recovery(server) < 0)
4895 goto recovery_failed;
4896 goto wait_on_recovery;
8ef2f8d4
CL		 4897 case -NFS4ERR_LEASE_MOVED:
4898 nfs4_schedule_lease_moved_recovery(clp);
4899 goto wait_on_recovery;
4745e315
AA		 4900#if defined(CONFIG_NFS_V4_1)
4901 case -NFS4ERR_BADSESSION:
4902 case -NFS4ERR_BADSLOT:
4903 case -NFS4ERR_BAD_HIGH_SLOT:
4904 case -NFS4ERR_DEADSESSION:
4905 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4906 case -NFS4ERR_SEQ_FALSE_RETRY:
4907 case -NFS4ERR_SEQ_MISORDERED:
4908 dprintk("%s ERROR %d, Reset session\n", __func__,
4909 task->tk_status);
9f594791 4910 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4911 goto wait_on_recovery;
4745e315 4912#endif /* CONFIG_NFS_V4_1 */
1da177e4 4913 case -NFS4ERR_DELAY:
aa5190d0 4914 nfs_inc_server_stats(server, NFSIOS_DELAY);
8478eaa1
N		 4915 rpc_delay(task, nfs4_update_delay(timeout));
4916 goto restart_call;
006ea73e 4917 case -NFS4ERR_GRACE:
1da177e4 4918 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4919 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4920 case -NFS4ERR_OLD_STATEID:
f1478c13 4921 goto restart_call;
1da177e4
LT		 4922 }
4923 task->tk_status = nfs4_map_errors(task->tk_status);
4924 return 0;
9f51a78e 4925recovery_failed:
5d422301
TM		 4926 task->tk_status = -EIO;
4927 return 0;
0400a6b0 4928wait_on_recovery:
a2c0b9e2 4929 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4930 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4931 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4932 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4933 goto recovery_failed;
f1478c13 4934restart_call:
a2c0b9e2
TM		 4935 task->tk_status = 0;
4936 return -EAGAIN;
1da177e4
LT		 4937}
4938
f092075d
CL		 4939static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4940 nfs4_verifier *bootverf)
cd93710e
CL		 4941{
4942 __be32 verf[2];
4943
2c820d9a
CL		 4944 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4945 /* An impossible timestamp guarantees this value
4946 * will never match a generated boot time. */
4947 verf[0] = 0;
17f26b12 4948 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4949 } else {
f092075d 4950 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4951 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4952 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4953 }
cd93710e
CL		 4954 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4955}
4956
e984a55a 4957static unsigned int
ceb3a16c 4958nfs4_init_nonuniform_client_string(struct nfs_client *clp,
e984a55a
CL		 4959 char *buf, size_t len)
4960{
4961 unsigned int result;
4962
ceb3a16c
TM		 4963 if (clp->cl_owner_id != NULL)
4964 return strlcpy(buf, clp->cl_owner_id, len);
4965
e984a55a
CL		 4966 rcu_read_lock();
4967 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4968 clp->cl_ipaddr,
4969 rpc_peeraddr2str(clp->cl_rpcclient,
4970 RPC_DISPLAY_ADDR),
4971 rpc_peeraddr2str(clp->cl_rpcclient,
4972 RPC_DISPLAY_PROTO));
4973 rcu_read_unlock();
ceb3a16c 4974 clp->cl_owner_id = kstrdup(buf, GFP_KERNEL);
e984a55a
CL		 4975 return result;
4976}
4977
4978static unsigned int
ceb3a16c 4979nfs4_init_uniform_client_string(struct nfs_client *clp,
e984a55a
CL		 4980 char *buf, size_t len)
4981{
55b59293 4982 const char *nodename = clp->cl_rpcclient->cl_nodename;
ceb3a16c
TM		 4983 unsigned int result;
4984
4985 if (clp->cl_owner_id != NULL)
4986 return strlcpy(buf, clp->cl_owner_id, len);
6f2ea7f2
CL		 4987
4988 if (nfs4_client_id_uniquifier[0] != '\0')
ceb3a16c 4989 result = scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
55b59293
TM		 4990 clp->rpc_ops->version,
4991 clp->cl_minorversion,
4992 nfs4_client_id_uniquifier,
4993 nodename);
ceb3a16c
TM		 4994 else
4995 result = scnprintf(buf, len, "Linux NFSv%u.%u %s",
e984a55a 4996 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4997 nodename);
ceb3a16c
TM		 4998 clp->cl_owner_id = kstrdup(buf, GFP_KERNEL);
4999 return result;
e984a55a
CL		 5000}
5001
706cb8db
CL		 5002/*
5003 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5004 * services. Advertise one based on the address family of the
5005 * clientaddr.
5006 */
5007static unsigned int
5008nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5009{
5010 if (strchr(clp->cl_ipaddr, ':') != NULL)
5011 return scnprintf(buf, len, "tcp6");
5012 else
5013 return scnprintf(buf, len, "tcp");
5014}
5015
f11b2a1c
JL		 5016static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5017{
5018 struct nfs4_setclientid *sc = calldata;
5019
5020 if (task->tk_status == 0)
5021 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5022}
5023
5024static const struct rpc_call_ops nfs4_setclientid_ops = {
5025 .rpc_call_done = nfs4_setclientid_done,
5026};
5027
6bbb4ae8
CL		 5028/**
5029 * nfs4_proc_setclientid - Negotiate client ID
5030 * @clp: state data structure
5031 * @program: RPC program for NFSv4 callback service
5032 * @port: IP port number for NFS4 callback service
5033 * @cred: RPC credential to use for this call
5034 * @res: where to place the result
5035 *
5036 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5037 */
bb8b27e5
TM		 5038int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5039 unsigned short port, struct rpc_cred *cred,
5040 struct nfs4_setclientid_res *res)
1da177e4
LT		 5041{
5042 nfs4_verifier sc_verifier;
5043 struct nfs4_setclientid setclientid = {
5044 .sc_verifier = &sc_verifier,
5045 .sc_prog = program,
f4eecd5d 5046 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 5047 };
5048 struct rpc_message msg = {
5049 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5050 .rpc_argp = &setclientid,
bb8b27e5 5051 .rpc_resp = res,
286d7d6a 5052 .rpc_cred = cred,
1da177e4 5053 };
f11b2a1c
JL		 5054 struct rpc_task *task;
5055 struct rpc_task_setup task_setup_data = {
5056 .rpc_client = clp->cl_rpcclient,
5057 .rpc_message = &msg,
5058 .callback_ops = &nfs4_setclientid_ops,
5059 .callback_data = &setclientid,
5060 .flags = RPC_TASK_TIMEOUT,
5061 };
6bbb4ae8 5062 int status;
1da177e4 5063
de734831 5064 /* nfs_client_id4 */
f092075d 5065 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 5066 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5067 setclientid.sc_name_len =
5068 nfs4_init_uniform_client_string(clp,
5069 setclientid.sc_name,
5070 sizeof(setclientid.sc_name));
5071 else
5072 setclientid.sc_name_len =
5073 nfs4_init_nonuniform_client_string(clp,
5074 setclientid.sc_name,
5075 sizeof(setclientid.sc_name));
de734831 5076 /* cb_client4 */
706cb8db
CL		 5077 setclientid.sc_netid_len =
5078 nfs4_init_callback_netid(clp,
5079 setclientid.sc_netid,
5080 sizeof(setclientid.sc_netid));
de734831 5081 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5082 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5083 clp->cl_ipaddr, port >> 8, port & 255);
5084
6bbb4ae8
CL		 5085 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
5086 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5087 setclientid.sc_name_len, setclientid.sc_name);
f11b2a1c
JL		 5088 task = rpc_run_task(&task_setup_data);
5089 if (IS_ERR(task)) {
5090 status = PTR_ERR(task);
5091 goto out;
5092 }
5093 status = task->tk_status;
5094 if (setclientid.sc_cred) {
5095 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5096 put_rpccred(setclientid.sc_cred);
5097 }
5098 rpc_put_task(task);
5099out:
c6d01c6f 5100 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5101 dprintk("NFS reply setclientid: %d\n", status);
5102 return status;
1da177e4
LT		 5103}
5104
6bbb4ae8
CL		 5105/**
5106 * nfs4_proc_setclientid_confirm - Confirm client ID
5107 * @clp: state data structure
5108 * @res: result of a previous SETCLIENTID
5109 * @cred: RPC credential to use for this call
5110 *
5111 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5112 */
fd954ae1 5113int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5114 struct nfs4_setclientid_res *arg,
5115 struct rpc_cred *cred)
1da177e4 5116{
1da177e4
LT		 5117 struct rpc_message msg = {
5118 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5119 .rpc_argp = arg,
286d7d6a 5120 .rpc_cred = cred,
1da177e4 5121 };
1da177e4
LT		 5122 int status;
5123
6bbb4ae8
CL		 5124 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5125 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5126 clp->cl_clientid);
1bd714f2 5127 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5128 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5129 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5130 return status;
5131}
5132
fe650407
TM		 5133struct nfs4_delegreturndata {
5134 struct nfs4_delegreturnargs args;
fa178f29 5135 struct nfs4_delegreturnres res;
fe650407
TM		 5136 struct nfs_fh fh;
5137 nfs4_stateid stateid;
26e976a8 5138 unsigned long timestamp;
fa178f29 5139 struct nfs_fattr fattr;
fe650407 5140 int rpc_status;
039b756a
PT		 5141 struct inode *inode;
5142 bool roc;
5143 u32 roc_barrier;
fe650407
TM		 5144};
5145
fe650407
TM		 5146static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5147{
5148 struct nfs4_delegreturndata *data = calldata;
938e1010 5149
14516c3a
TM		 5150 if (!nfs4_sequence_done(task, &data->res.seq_res))
5151 return;
938e1010 5152
ca8acf8d 5153 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5154 switch (task->tk_status) {
79708861 5155 case 0:
fa178f29 5156 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5157 case -NFS4ERR_ADMIN_REVOKED:
5158 case -NFS4ERR_DELEG_REVOKED:
5159 case -NFS4ERR_BAD_STATEID:
5160 case -NFS4ERR_OLD_STATEID:
5161 case -NFS4ERR_STALE_STATEID:
5162 case -NFS4ERR_EXPIRED:
5163 task->tk_status = 0;
039b756a
PT		 5164 if (data->roc)
5165 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5166 break;
79708861 5167 default:
8478eaa1
N		 5168 if (nfs4_async_handle_error(task, data->res.server,
5169 NULL, NULL) == -EAGAIN) {
d00c5d43 5170 rpc_restart_call_prepare(task);
79708861
RL		 5171 return;
5172 }
5173 }
5174 data->rpc_status = task->tk_status;
fe650407
TM		 5175}
5176
5177static void nfs4_delegreturn_release(void *calldata)
5178{
039b756a 5179 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5180 struct inode *inode = data->inode;
039b756a 5181
ea7c38fe
TM		 5182 if (inode) {
5183 if (data->roc)
5184 pnfs_roc_release(inode);
5185 nfs_iput_and_deactive(inode);
5186 }
fe650407
TM		 5187 kfree(calldata);
5188}
5189
938e1010
AA		 5190static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5191{
5192 struct nfs4_delegreturndata *d_data;
5193
5194 d_data = (struct nfs4_delegreturndata *)data;
5195
039b756a
PT		 5196 if (d_data->roc &&
5197 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5198 return;
5199
d9afbd1b
TM		 5200 nfs4_setup_sequence(d_data->res.server,
5201 &d_data->args.seq_args,
5202 &d_data->res.seq_res,
5203 task);
938e1010 5204}
938e1010 5205
c8d149f3 5206static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5207 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5208 .rpc_call_done = nfs4_delegreturn_done,
5209 .rpc_release = nfs4_delegreturn_release,
5210};
5211
e6f81075 5212static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5213{
5214 struct nfs4_delegreturndata *data;
fa178f29 5215 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5216 struct rpc_task *task;
5138fde0
TM		 5217 struct rpc_message msg = {
5218 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5219 .rpc_cred = cred,
5220 };
c970aa85
TM		 5221 struct rpc_task_setup task_setup_data = {
5222 .rpc_client = server->client,
5138fde0 5223 .rpc_message = &msg,
c970aa85
TM		 5224 .callback_ops = &nfs4_delegreturn_ops,
5225 .flags = RPC_TASK_ASYNC,
5226 };
e6f81075 5227 int status = 0;
fe650407 5228
8535b2be 5229 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5230 if (data == NULL)
5231 return -ENOMEM;
a9c92d6b 5232 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5233 data->args.fhandle = &data->fh;
5234 data->args.stateid = &data->stateid;
9e907fec 5235 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5236 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5237 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5238 data->res.fattr = &data->fattr;
5239 data->res.server = server;
5138fde0 5240 nfs_fattr_init(data->res.fattr);
26e976a8 5241 data->timestamp = jiffies;
fe650407 5242 data->rpc_status = 0;
ea7c38fe
TM		 5243 data->inode = nfs_igrab_and_active(inode);
5244 if (data->inode)
5245 data->roc = nfs4_roc(inode);
fe650407 5246
c970aa85 5247 task_setup_data.callback_data = data;
1174dd1f
TM		 5248 msg.rpc_argp = &data->args;
5249 msg.rpc_resp = &data->res;
c970aa85 5250 task = rpc_run_task(&task_setup_data);
7a1218a2 5251 if (IS_ERR(task))
fe650407 5252 return PTR_ERR(task);
e6f81075
TM		 5253 if (!issync)
5254 goto out;
fe650407 5255 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5256 if (status != 0)
5257 goto out;
5258 status = data->rpc_status;
e144cbcc
TM		 5259 if (status == 0)
5260 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5261 else
5262 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5263out:
e6b3c4db 5264 rpc_put_task(task);
fe650407 5265 return status;
1da177e4
LT		 5266}
5267
e6f81075 5268int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5269{
5270 struct nfs_server *server = NFS_SERVER(inode);
5271 struct nfs4_exception exception = { };
5272 int err;
5273 do {
e6f81075 5274 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5275 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5276 switch (err) {
5277 case -NFS4ERR_STALE_STATEID:
5278 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5279 case 0:
5280 return 0;
5281 }
5282 err = nfs4_handle_exception(server, err, &exception);
5283 } while (exception.retry);
5284 return err;
5285}
5286
5287#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5288#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5289
5290/*
5291 * sleep, with exponential backoff, and retry the LOCK operation.
5292 */
5293static unsigned long
5294nfs4_set_lock_task_retry(unsigned long timeout)
5295{
416ad3c9 5296 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5297 timeout <<= 1;
5298 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5299 return NFS4_LOCK_MAXTIMEOUT;
5300 return timeout;
5301}
5302
1da177e4
LT		 5303static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5304{
5305 struct inode *inode = state->inode;
5306 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5307 struct nfs_client *clp = server->nfs_client;
911d1aaf 5308 struct nfs_lockt_args arg = {
1da177e4 5309 .fh = NFS_FH(inode),
911d1aaf 5310 .fl = request,
1da177e4 5311 };
911d1aaf
TM		 5312 struct nfs_lockt_res res = {
5313 .denied = request,
1da177e4
LT		 5314 };
5315 struct rpc_message msg = {
5316 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5317 .rpc_argp = &arg,
5318 .rpc_resp = &res,
5319 .rpc_cred = state->owner->so_cred,
5320 };
1da177e4
LT		 5321 struct nfs4_lock_state *lsp;
5322 int status;
5323
911d1aaf 5324 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5325 status = nfs4_set_lock_state(state, request);
5326 if (status != 0)
5327 goto out;
5328 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5329 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5330 arg.lock_owner.s_dev = server->s_dev;
7c513058 5331 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5332 switch (status) {
5333 case 0:
5334 request->fl_type = F_UNLCK;
5335 break;
5336 case -NFS4ERR_DENIED:
5337 status = 0;
1da177e4 5338 }
70cc6487 5339 request->fl_ops->fl_release_private(request);
a6f951dd 5340 request->fl_ops = NULL;
8d0a8a9d 5341out:
1da177e4
LT		 5342 return status;
5343}
5344
5345static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5346{
5347 struct nfs4_exception exception = { };
5348 int err;
5349
5350 do {
d1b748a5
TM		 5351 err = _nfs4_proc_getlk(state, cmd, request);
5352 trace_nfs4_get_lock(request, state, cmd, err);
5353 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5354 &exception);
5355 } while (exception.retry);
5356 return err;
5357}
5358
5359static int do_vfs_lock(struct file *file, struct file_lock *fl)
5360{
5361 int res = 0;
5362 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5363 case FL_POSIX:
5364 res = posix_lock_file_wait(file, fl);
5365 break;
5366 case FL_FLOCK:
5367 res = flock_lock_file_wait(file, fl);
5368 break;
5369 default:
5370 BUG();
5371 }
1da177e4
LT		 5372 return res;
5373}
5374
faf5f49c 5375struct nfs4_unlockdata {
911d1aaf
TM		 5376 struct nfs_locku_args arg;
5377 struct nfs_locku_res res;
faf5f49c
TM		 5378 struct nfs4_lock_state *lsp;
5379 struct nfs_open_context *ctx;
911d1aaf
TM		 5380 struct file_lock fl;
5381 const struct nfs_server *server;
26e976a8 5382 unsigned long timestamp;
faf5f49c
TM		 5383};
5384
911d1aaf
TM		 5385static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5386 struct nfs_open_context *ctx,
5387 struct nfs4_lock_state *lsp,
5388 struct nfs_seqid *seqid)
5389{
5390 struct nfs4_unlockdata *p;
5391 struct inode *inode = lsp->ls_state->inode;
5392
8535b2be 5393 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5394 if (p == NULL)
5395 return NULL;
5396 p->arg.fh = NFS_FH(inode);
5397 p->arg.fl = &p->fl;
5398 p->arg.seqid = seqid;
c1d51931 5399 p->res.seqid = seqid;
911d1aaf
TM		 5400 p->lsp = lsp;
5401 atomic_inc(&lsp->ls_count);
5402 /* Ensure we don't close file until we're done freeing locks! */
5403 p->ctx = get_nfs_open_context(ctx);
5404 memcpy(&p->fl, fl, sizeof(p->fl));
5405 p->server = NFS_SERVER(inode);
5406 return p;
5407}
5408
06f814a3 5409static void nfs4_locku_release_calldata(void *data)
faf5f49c 5410{
963d8fe5 5411 struct nfs4_unlockdata *calldata = data;
911d1aaf 5412 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5413 nfs4_put_lock_state(calldata->lsp);
5414 put_nfs_open_context(calldata->ctx);
5415 kfree(calldata);
faf5f49c
TM		 5416}
5417
963d8fe5 5418static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5419{
963d8fe5 5420 struct nfs4_unlockdata *calldata = data;
faf5f49c 5421
14516c3a
TM		 5422 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5423 return;
faf5f49c
TM		 5424 switch (task->tk_status) {
5425 case 0:
26e976a8 5426 renew_lease(calldata->server, calldata->timestamp);
c69899a1
TM		 5427 do_vfs_lock(calldata->fl.fl_file, &calldata->fl);
5428 if (nfs4_update_lock_stateid(calldata->lsp,
5429 &calldata->res.stateid))
5430 break;
9e33bed5
TM		 5431 case -NFS4ERR_BAD_STATEID:
5432 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5433 case -NFS4ERR_STALE_STATEID:
5434 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5435 if (!nfs4_stateid_match(&calldata->arg.stateid,
5436 &calldata->lsp->ls_stateid))
5437 rpc_restart_call_prepare(task);
faf5f49c
TM		 5438 break;
5439 default:
8478eaa1
N		 5440 if (nfs4_async_handle_error(task, calldata->server,
5441 NULL, NULL) == -EAGAIN)
d00c5d43 5442 rpc_restart_call_prepare(task);
faf5f49c 5443 }
2b1bc308 5444 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5445}
5446
4ce70ada 5447static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5448{
4ce70ada 5449 struct nfs4_unlockdata *calldata = data;
faf5f49c 5450
911d1aaf 5451 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5452 goto out_wait;
425c1d4e 5453 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5454 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5455 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5456 goto out_no_action;
faf5f49c 5457 }
26e976a8 5458 calldata->timestamp = jiffies;
035168ab 5459 if (nfs4_setup_sequence(calldata->server,
a893693c 5460 &calldata->arg.seq_args,
2240a9e2
TM		 5461 &calldata->res.seq_res,
5462 task) != 0)
5463 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5464 return;
5465out_no_action:
5466 task->tk_action = NULL;
5467out_wait:
5468 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5469}
5470
963d8fe5 5471static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5472 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5473 .rpc_call_done = nfs4_locku_done,
06f814a3 5474 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5475};
5476
a5d16a4d
TM		 5477static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5478 struct nfs_open_context *ctx,
5479 struct nfs4_lock_state *lsp,
5480 struct nfs_seqid *seqid)
5481{
5482 struct nfs4_unlockdata *data;
5138fde0
TM		 5483 struct rpc_message msg = {
5484 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5485 .rpc_cred = ctx->cred,
5486 };
c970aa85
TM		 5487 struct rpc_task_setup task_setup_data = {
5488 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5489 .rpc_message = &msg,
c970aa85 5490 .callback_ops = &nfs4_locku_ops,
101070ca 5491 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5492 .flags = RPC_TASK_ASYNC,
5493 };
a5d16a4d 5494
fa940720
WAA		 5495 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5496 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5497
137d6aca
FF		 5498 /* Ensure this is an unlock - when canceling a lock, the
5499 * canceled lock is passed in, and it won't be an unlock.
5500 */
5501 fl->fl_type = F_UNLCK;
5502
a5d16a4d
TM		 5503 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5504 if (data == NULL) {
5505 nfs_free_seqid(seqid);
5506 return ERR_PTR(-ENOMEM);
5507 }
5508
a9c92d6b 5509 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5510 msg.rpc_argp = &data->arg;
5511 msg.rpc_resp = &data->res;
c970aa85
TM		 5512 task_setup_data.callback_data = data;
5513 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5514}
5515
faf5f49c
TM		 5516static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5517{
65b62a29
TM		 5518 struct inode *inode = state->inode;
5519 struct nfs4_state_owner *sp = state->owner;
5520 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5521 struct nfs_seqid *seqid;
1da177e4 5522 struct nfs4_lock_state *lsp;
06f814a3 5523 struct rpc_task *task;
b4019c0e 5524 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5525 int status = 0;
536ff0f8 5526 unsigned char fl_flags = request->fl_flags;
faf5f49c 5527
8d0a8a9d 5528 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5529 /* Unlock _before_ we do the RPC call */
5530 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5531 /* Exclude nfs_delegation_claim_locks() */
5532 mutex_lock(&sp->so_delegreturn_mutex);
5533 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5534 down_read(&nfsi->rwsem);
5535 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5536 up_read(&nfsi->rwsem);
65b62a29 5537 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5538 goto out;
19e03c57
TM		 5539 }
5540 up_read(&nfsi->rwsem);
65b62a29 5541 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5542 if (status != 0)
9b073574
TM		 5543 goto out;
5544 /* Is this a delegated lock? */
8d0a8a9d 5545 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5546 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5547 goto out;
b4019c0e
TM		 5548 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5549 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5550 status = -ENOMEM;
badc76dd 5551 if (IS_ERR(seqid))
9b073574 5552 goto out;
cd3758e3 5553 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5554 status = PTR_ERR(task);
5555 if (IS_ERR(task))
9b073574 5556 goto out;
a5d16a4d 5557 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5558 rpc_put_task(task);
9b073574 5559out:
536ff0f8 5560 request->fl_flags = fl_flags;
d1b748a5 5561 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5562 return status;
5563}
5564
a5d16a4d
TM		 5565struct nfs4_lockdata {
5566 struct nfs_lock_args arg;
5567 struct nfs_lock_res res;
5568 struct nfs4_lock_state *lsp;
5569 struct nfs_open_context *ctx;
5570 struct file_lock fl;
26e976a8 5571 unsigned long timestamp;
a5d16a4d
TM		 5572 int rpc_status;
5573 int cancelled;
66179efe 5574 struct nfs_server *server;
a5d16a4d
TM		 5575};
5576
5577static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5578 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5579 gfp_t gfp_mask)
1da177e4 5580{
a5d16a4d
TM		 5581 struct nfs4_lockdata *p;
5582 struct inode *inode = lsp->ls_state->inode;
1da177e4 5583 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5584 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5585
8535b2be 5586 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5587 if (p == NULL)
5588 return NULL;
5589
5590 p->arg.fh = NFS_FH(inode);
5591 p->arg.fl = &p->fl;
8535b2be 5592 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5593 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5594 goto out_free;
b4019c0e
TM		 5595 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5596 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5597 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5598 goto out_free_seqid;
7539bbab 5599 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5600 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5601 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5602 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5603 p->lsp = lsp;
66179efe 5604 p->server = server;
a5d16a4d
TM		 5605 atomic_inc(&lsp->ls_count);
5606 p->ctx = get_nfs_open_context(ctx);
5607 memcpy(&p->fl, fl, sizeof(p->fl));
5608 return p;
2f74c0a0
TM		 5609out_free_seqid:
5610 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5611out_free:
5612 kfree(p);
5613 return NULL;
5614}
5615
5616static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5617{
5618 struct nfs4_lockdata *data = calldata;
5619 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5620
3110ff80 5621 dprintk("%s: begin!\n", __func__);
2f74c0a0 5622 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5623 goto out_wait;
a5d16a4d 5624 /* Do we need to do an open_to_lock_owner? */
6b447539 5625 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5626 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5627 goto out_release_lock_seqid;
8fe72bac 5628 }
425c1d4e
TM		 5629 nfs4_stateid_copy(&data->arg.open_stateid,
5630 &state->open_stateid);
a5d16a4d 5631 data->arg.new_lock_owner = 1;
c1d51931 5632 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5633 } else {
2f74c0a0 5634 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5635 nfs4_stateid_copy(&data->arg.lock_stateid,
5636 &data->lsp->ls_stateid);
5637 }
5d422301
TM		 5638 if (!nfs4_valid_open_stateid(state)) {
5639 data->rpc_status = -EBADF;
5640 task->tk_action = NULL;
5641 goto out_release_open_seqid;
5642 }
26e976a8 5643 data->timestamp = jiffies;
035168ab
TM		 5644 if (nfs4_setup_sequence(data->server,
5645 &data->arg.seq_args,
2240a9e2 5646 &data->res.seq_res,
d9afbd1b 5647 task) == 0)
66179efe 5648 return;
5d422301 5649out_release_open_seqid:
2240a9e2
TM		 5650 nfs_release_seqid(data->arg.open_seqid);
5651out_release_lock_seqid:
5652 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5653out_wait:
5654 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5655 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5656}
5657
a5d16a4d
TM		 5658static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5659{
5660 struct nfs4_lockdata *data = calldata;
39071e6f 5661 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5662
3110ff80 5663 dprintk("%s: begin!\n", __func__);
a5d16a4d 5664
14516c3a
TM		 5665 if (!nfs4_sequence_done(task, &data->res.seq_res))
5666 return;
66179efe 5667
a5d16a4d 5668 data->rpc_status = task->tk_status;
425c1d4e
TM		 5669 switch (task->tk_status) {
5670 case 0:
2b0143b5 5671 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 5672 data->timestamp);
c69899a1
TM		 5673 if (data->arg.new_lock) {
5674 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
5675 if (do_vfs_lock(data->fl.fl_file, &data->fl) < 0) {
5676 rpc_restart_call_prepare(task);
5677 break;
5678 }
5679 }
39071e6f
TM		 5680 if (data->arg.new_lock_owner != 0) {
5681 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5682 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5683 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5684 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5685 rpc_restart_call_prepare(task);
425c1d4e
TM		 5686 break;
5687 case -NFS4ERR_BAD_STATEID:
5688 case -NFS4ERR_OLD_STATEID:
5689 case -NFS4ERR_STALE_STATEID:
5690 case -NFS4ERR_EXPIRED:
5691 if (data->arg.new_lock_owner != 0) {
5692 if (!nfs4_stateid_match(&data->arg.open_stateid,
5693 &lsp->ls_state->open_stateid))
5694 rpc_restart_call_prepare(task);
5695 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5696 &lsp->ls_stateid))
5697 rpc_restart_call_prepare(task);
a5d16a4d 5698 }
3110ff80 5699 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5700}
5701
5702static void nfs4_lock_release(void *calldata)
5703{
5704 struct nfs4_lockdata *data = calldata;
5705
3110ff80 5706 dprintk("%s: begin!\n", __func__);
2f74c0a0 5707 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5708 if (data->cancelled != 0) {
5709 struct rpc_task *task;
5710 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5711 data->arg.lock_seqid);
5712 if (!IS_ERR(task))
bf294b41 5713 rpc_put_task_async(task);
3110ff80 5714 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5715 } else
5716 nfs_free_seqid(data->arg.lock_seqid);
5717 nfs4_put_lock_state(data->lsp);
5718 put_nfs_open_context(data->ctx);
5719 kfree(data);
3110ff80 5720 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5721}
5722
5723static const struct rpc_call_ops nfs4_lock_ops = {
5724 .rpc_call_prepare = nfs4_lock_prepare,
5725 .rpc_call_done = nfs4_lock_done,
5726 .rpc_release = nfs4_lock_release,
5727};
5728
2bee72a6
TM		 5729static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5730{
2bee72a6
TM		 5731 switch (error) {
5732 case -NFS4ERR_ADMIN_REVOKED:
5733 case -NFS4ERR_BAD_STATEID:
ecac799a 5734 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5735 if (new_lock_owner != 0 ||
795a88c9 5736 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5737 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5738 break;
5739 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5740 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5741 case -NFS4ERR_EXPIRED:
5742 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5743 };
5744}
5745
afe6c27c 5746static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5747{
5748 struct nfs4_lockdata *data;
5749 struct rpc_task *task;
5138fde0
TM		 5750 struct rpc_message msg = {
5751 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5752 .rpc_cred = state->owner->so_cred,
5753 };
c970aa85
TM		 5754 struct rpc_task_setup task_setup_data = {
5755 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5756 .rpc_message = &msg,
c970aa85 5757 .callback_ops = &nfs4_lock_ops,
101070ca 5758 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5759 .flags = RPC_TASK_ASYNC,
5760 };
a5d16a4d
TM		 5761 int ret;
5762
3110ff80 5763 dprintk("%s: begin!\n", __func__);
cd3758e3 5764 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5765 fl->fl_u.nfs4_fl.owner,
5766 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5767 if (data == NULL)
5768 return -ENOMEM;
5769 if (IS_SETLKW(cmd))
5770 data->arg.block = 1;
a9c92d6b 5771 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5772 msg.rpc_argp = &data->arg;
5773 msg.rpc_resp = &data->res;
c970aa85 5774 task_setup_data.callback_data = data;
8fe72bac
TM		 5775 if (recovery_type > NFS_LOCK_NEW) {
5776 if (recovery_type == NFS_LOCK_RECLAIM)
5777 data->arg.reclaim = NFS_LOCK_RECLAIM;
5778 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 5779 } else
5780 data->arg.new_lock = 1;
c970aa85 5781 task = rpc_run_task(&task_setup_data);
7a1218a2 5782 if (IS_ERR(task))
a5d16a4d 5783 return PTR_ERR(task);
a5d16a4d
TM		 5784 ret = nfs4_wait_for_completion_rpc_task(task);
5785 if (ret == 0) {
5786 ret = data->rpc_status;
2bee72a6
TM		 5787 if (ret)
5788 nfs4_handle_setlk_error(data->server, data->lsp,
5789 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5790 } else
5791 data->cancelled = 1;
e6b3c4db 5792 rpc_put_task(task);
3110ff80 5793 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5794 return ret;
1da177e4
LT		 5795}
5796
5797static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5798{
202b50dc 5799 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5800 struct nfs4_exception exception = {
5801 .inode = state->inode,
5802 };
202b50dc
TM		 5803 int err;
5804
5805 do {
42a2d13e
TM		 5806 /* Cache the lock if possible... */
5807 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5808 return 0;
afe6c27c 5809 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5810 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5811 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5812 break;
5813 nfs4_handle_exception(server, err, &exception);
5814 } while (exception.retry);
5815 return err;
1da177e4
LT		 5816}
5817
5818static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5819{
202b50dc 5820 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5821 struct nfs4_exception exception = {
5822 .inode = state->inode,
5823 };
202b50dc
TM		 5824 int err;
5825
6bfc93ef
TM		 5826 err = nfs4_set_lock_state(state, request);
5827 if (err != 0)
5828 return err;
f6de7a39 5829 if (!recover_lost_locks) {
ef1820f9
N		 5830 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5831 return 0;
5832 }
202b50dc 5833 do {
42a2d13e
TM		 5834 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5835 return 0;
afe6c27c 5836 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5837 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5838 switch (err) {
5839 default:
5840 goto out;
5841 case -NFS4ERR_GRACE:
5842 case -NFS4ERR_DELAY:
5843 nfs4_handle_exception(server, err, &exception);
5844 err = 0;
5845 }
202b50dc 5846 } while (exception.retry);
a9ed2e25 5847out:
202b50dc 5848 return err;
1da177e4
LT		 5849}
5850
f062eb6c 5851#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5852/**
5853 * nfs41_check_expired_locks - possibly free a lock stateid
5854 *
5855 * @state: NFSv4 state for an inode
5856 *
5857 * Returns NFS_OK if recovery for this stateid is now finished.
5858 * Otherwise a negative NFS4ERR value is returned.
5859 */
b01dd1d8 5860static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5861{
eb64cf96 5862 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5863 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5864 struct nfs_server *server = NFS_SERVER(state->inode);
5865
b01dd1d8 5866 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5867 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5868 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5869
5870 status = nfs41_test_stateid(server,
5871 &lsp->ls_stateid,
5872 cred);
08cb47fa 5873 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5874 if (status != NFS_OK) {
3e60ffdd
CL		 5875 /* Free the stateid unless the server
5876 * informs us the stateid is unrecognized. */
89af2739
CL		 5877 if (status != -NFS4ERR_BAD_STATEID)
5878 nfs41_free_stateid(server,
ab7cb0df
TM		 5879 &lsp->ls_stateid,
5880 cred);
795a88c9 5881 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5882 ret = status;
5883 }
5884 }
5885 };
5886
5887 return ret;
5888}
5889
5890static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5891{
5892 int status = NFS_OK;
5893
5894 if (test_bit(LK_STATE_IN_USE, &state->flags))
5895 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5896 if (status != NFS_OK)
5897 status = nfs4_lock_expired(state, request);
5898 return status;
f062eb6c
BS		 5899}
5900#endif
5901
1da177e4
LT		 5902static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5903{
19e03c57 5904 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5905 unsigned char fl_flags = request->fl_flags;
8e469ebd 5906 int status = -ENOLCK;
1da177e4 5907
8e469ebd
TM		 5908 if ((fl_flags & FL_POSIX) &&
5909 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5910 goto out;
6bfc93ef 5911 /* Is this a delegated open? */
6bfc93ef
TM		 5912 status = nfs4_set_lock_state(state, request);
5913 if (status != 0)
5914 goto out;
01c3b861
TM		 5915 request->fl_flags |= FL_ACCESS;
5916 status = do_vfs_lock(request->fl_file, request);
5917 if (status < 0)
5918 goto out;
19e03c57 5919 down_read(&nfsi->rwsem);
01c3b861 5920 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5921 /* Yes: cache locks! */
01c3b861 5922 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5923 request->fl_flags = fl_flags & ~FL_SLEEP;
5924 status = do_vfs_lock(request->fl_file, request);
c69899a1 5925 up_read(&nfsi->rwsem);
9a99af49 5926 goto out;
9a99af49 5927 }
19e03c57 5928 up_read(&nfsi->rwsem);
c69899a1 5929 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 5930out:
5931 request->fl_flags = fl_flags;
1da177e4
LT		 5932 return status;
5933}
5934
5935static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5936{
a1d0b5ee
TM		 5937 struct nfs4_exception exception = {
5938 .state = state,
05ffe24f 5939 .inode = state->inode,
a1d0b5ee 5940 };
1da177e4
LT		 5941 int err;
5942
5943 do {
965b5d67 5944 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5945 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5946 if (err == -NFS4ERR_DENIED)
5947 err = -EAGAIN;
1da177e4 5948 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5949 err, &exception);
1da177e4
LT		 5950 } while (exception.retry);
5951 return err;
5952}
5953
5954static int
5955nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5956{
5957 struct nfs_open_context *ctx;
5958 struct nfs4_state *state;
5959 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5960 int status;
5961
5962 /* verify open state */
cd3758e3 5963 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5964 state = ctx->state;
5965
5966 if (request->fl_start < 0 || request->fl_end < 0)
5967 return -EINVAL;
5968
d953126a
TM		 5969 if (IS_GETLK(cmd)) {
5970 if (state != NULL)
5971 return nfs4_proc_getlk(state, F_GETLK, request);
5972 return 0;
5973 }
1da177e4
LT		 5974
5975 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5976 return -EINVAL;
5977
d953126a
TM		 5978 if (request->fl_type == F_UNLCK) {
5979 if (state != NULL)
5980 return nfs4_proc_unlck(state, cmd, request);
5981 return 0;
5982 }
1da177e4 5983
d953126a
TM		 5984 if (state == NULL)
5985 return -ENOLCK;
55725513
TM		 5986 /*
5987 * Don't rely on the VFS having checked the file open mode,
5988 * since it won't do this for flock() locks.
5989 */
f44106e2 5990 switch (request->fl_type) {
55725513
TM		 5991 case F_RDLCK:
5992 if (!(filp->f_mode & FMODE_READ))
5993 return -EBADF;
5994 break;
5995 case F_WRLCK:
5996 if (!(filp->f_mode & FMODE_WRITE))
5997 return -EBADF;
5998 }
5999
1da177e4
LT		 6000 do {
6001 status = nfs4_proc_setlk(state, cmd, request);
6002 if ((status != -EAGAIN) || IS_SETLK(cmd))
6003 break;
6004 timeout = nfs4_set_lock_task_retry(timeout);
6005 status = -ERESTARTSYS;
6006 if (signalled())
6007 break;
6008 } while(status < 0);
1da177e4
LT		 6009 return status;
6010}
6011
db4f2e63 6012int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6013{
6014 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6015 int err;
6016
6017 err = nfs4_set_lock_state(state, fl);
6018 if (err != 0)
db4f2e63 6019 return err;
4a706fa0 6020 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6021 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6022}
6b3b5496 6023
cf470c3e
TM		 6024struct nfs_release_lockowner_data {
6025 struct nfs4_lock_state *lsp;
5ae67c4f 6026 struct nfs_server *server;
cf470c3e 6027 struct nfs_release_lockowner_args args;
b7e63a10 6028 struct nfs_release_lockowner_res res;
60ea6812 6029 unsigned long timestamp;
cf470c3e
TM		 6030};
6031
fbd4bfd1
CL		 6032static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6033{
6034 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6035 struct nfs_server *server = data->server;
cb04ad2a
PT		 6036 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6037 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6038 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6039 data->timestamp = jiffies;
fbd4bfd1
CL		 6040}
6041
6042static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6043{
6044 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6045 struct nfs_server *server = data->server;
6046
b7e63a10 6047 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6048
6049 switch (task->tk_status) {
6050 case 0:
6051 renew_lease(server, data->timestamp);
6052 break;
6053 case -NFS4ERR_STALE_CLIENTID:
6054 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6055 nfs4_schedule_lease_recovery(server->nfs_client);
6056 break;
60ea6812
CL		 6057 case -NFS4ERR_LEASE_MOVED:
6058 case -NFS4ERR_DELAY:
8478eaa1
N		 6059 if (nfs4_async_handle_error(task, server,
6060 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6061 rpc_restart_call_prepare(task);
6062 }
fbd4bfd1
CL		 6063}
6064
d3c7b7cc
TM		 6065static void nfs4_release_lockowner_release(void *calldata)
6066{
cf470c3e 6067 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6068 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6069 kfree(calldata);
6070}
6071
17280175 6072static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6073 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6074 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6075 .rpc_release = nfs4_release_lockowner_release,
6076};
6077
f1cdae87
JL		 6078static void
6079nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6080{
cf470c3e 6081 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6082 struct rpc_message msg = {
6083 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6084 };
6085
6086 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6087 return;
fbd4bfd1 6088
cf470c3e
TM		 6089 data = kmalloc(sizeof(*data), GFP_NOFS);
6090 if (!data)
f1cdae87 6091 return;
cf470c3e 6092 data->lsp = lsp;
5ae67c4f 6093 data->server = server;
cf470c3e
TM		 6094 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6095 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6096 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6097
cf470c3e 6098 msg.rpc_argp = &data->args;
b7e63a10
TM		 6099 msg.rpc_resp = &data->res;
6100 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6101 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6102}
6103
aa1870af
BF		 6104#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6105
64c2ce8b
AK		 6106static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6107 const void *buf, size_t buflen,
6108 int flags, int type)
6b3b5496 6109{
64c2ce8b
AK		 6110 if (strcmp(key, "") != 0)
6111 return -EINVAL;
4b580ee3 6112
2b0143b5 6113 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6114}
6115
64c2ce8b
AK		 6116static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6117 void *buf, size_t buflen, int type)
6b3b5496 6118{
64c2ce8b
AK		 6119 if (strcmp(key, "") != 0)
6120 return -EINVAL;
aa1870af 6121
2b0143b5 6122 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6123}
6124
64c2ce8b
AK		 6125static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6126 size_t list_len, const char *name,
6127 size_t name_len, int type)
6b3b5496 6128{
64c2ce8b 6129 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6130
2b0143b5 6131 if (!nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))))
096455a2 6132 return 0;
64c2ce8b
AK		 6133
6134 if (list && len <= list_len)
6135 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6136 return len;
6b3b5496
BF		 6137}
6138
c9bccef6
DQ		 6139#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6140static inline int nfs4_server_supports_labels(struct nfs_server *server)
6141{
6142 return server->caps & NFS_CAP_SECURITY_LABEL;
6143}
6144
6145static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6146 const void *buf, size_t buflen,
6147 int flags, int type)
6148{
6149 if (security_ismaclabel(key))
6150 return nfs4_set_security_label(dentry, buf, buflen);
6151
6152 return -EOPNOTSUPP;
6153}
6154
6155static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6156 void *buf, size_t buflen, int type)
6157{
6158 if (security_ismaclabel(key))
2b0143b5 6159 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
c9bccef6
DQ		 6160 return -EOPNOTSUPP;
6161}
6162
6163static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6164 size_t list_len, const char *name,
6165 size_t name_len, int type)
6166{
6167 size_t len = 0;
6168
2b0143b5
DH		 6169 if (nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) {
6170 len = security_inode_listsecurity(d_inode(dentry), NULL, 0);
c9bccef6 6171 if (list && len <= list_len)
2b0143b5 6172 security_inode_listsecurity(d_inode(dentry), list, len);
c9bccef6
DQ		 6173 }
6174 return len;
6175}
6176
6177static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6178 .prefix = XATTR_SECURITY_PREFIX,
6179 .list = nfs4_xattr_list_nfs4_label,
6180 .get = nfs4_xattr_get_nfs4_label,
6181 .set = nfs4_xattr_set_nfs4_label,
6182};
6183#endif
6184
6185
533eb461
AA		 6186/*
6187 * nfs_fhget will use either the mounted_on_fileid or the fileid
6188 */
69aaaae1
TM		 6189static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6190{
533eb461
AA		 6191 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6192 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6193 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6194 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6195 return;
6196
6197 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6198 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6199 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6200 fattr->nlink = 2;
6201}
6202
f05d147f
BS		 6203static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6204 const struct qstr *name,
6205 struct nfs4_fs_locations *fs_locations,
6206 struct page *page)
683b57b4
TM		 6207{
6208 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6209 u32 bitmask[3] = {
361e624f 6210 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6211 };
6212 struct nfs4_fs_locations_arg args = {
6213 .dir_fh = NFS_FH(dir),
c228fd3a 6214 .name = name,
683b57b4
TM		 6215 .page = page,
6216 .bitmask = bitmask,
6217 };
22958463
BH		 6218 struct nfs4_fs_locations_res res = {
6219 .fs_locations = fs_locations,
6220 };
683b57b4
TM		 6221 struct rpc_message msg = {
6222 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6223 .rpc_argp = &args,
22958463 6224 .rpc_resp = &res,
683b57b4
TM		 6225 };
6226 int status;
6227
3110ff80 6228 dprintk("%s: start\n", __func__);
533eb461
AA		 6229
6230 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6231 * is not supported */
6232 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6233 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6234 else
6235 bitmask[0] |= FATTR4_WORD0_FILEID;
6236
c228fd3a 6237 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6238 fs_locations->server = server;
830b8e33 6239 fs_locations->nlocations = 0;
f05d147f 6240 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6241 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6242 return status;
6243}
6244
f05d147f
BS		 6245int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6246 const struct qstr *name,
6247 struct nfs4_fs_locations *fs_locations,
6248 struct page *page)
db0a9593
BS		 6249{
6250 struct nfs4_exception exception = { };
6251 int err;
6252 do {
078ea3df
TM		 6253 err = _nfs4_proc_fs_locations(client, dir, name,
6254 fs_locations, page);
6255 trace_nfs4_get_fs_locations(dir, name, err);
6256 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6257 &exception);
6258 } while (exception.retry);
6259 return err;
6260}
6261
b03d735b
CL		 6262/*
6263 * This operation also signals the server that this client is
6264 * performing migration recovery. The server can stop returning
6265 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6266 * appended to this compound to identify the client ID which is
6267 * performing recovery.
6268 */
6269static int _nfs40_proc_get_locations(struct inode *inode,
6270 struct nfs4_fs_locations *locations,
6271 struct page *page, struct rpc_cred *cred)
6272{
6273 struct nfs_server *server = NFS_SERVER(inode);
6274 struct rpc_clnt *clnt = server->client;
6275 u32 bitmask[2] = {
6276 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6277 };
6278 struct nfs4_fs_locations_arg args = {
6279 .clientid = server->nfs_client->cl_clientid,
6280 .fh = NFS_FH(inode),
6281 .page = page,
6282 .bitmask = bitmask,
6283 .migration = 1, /* skip LOOKUP */
6284 .renew = 1, /* append RENEW */
6285 };
6286 struct nfs4_fs_locations_res res = {
6287 .fs_locations = locations,
6288 .migration = 1,
6289 .renew = 1,
6290 };
6291 struct rpc_message msg = {
6292 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6293 .rpc_argp = &args,
6294 .rpc_resp = &res,
6295 .rpc_cred = cred,
6296 };
6297 unsigned long now = jiffies;
6298 int status;
6299
6300 nfs_fattr_init(&locations->fattr);
6301 locations->server = server;
6302 locations->nlocations = 0;
6303
6304 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6305 nfs4_set_sequence_privileged(&args.seq_args);
6306 status = nfs4_call_sync_sequence(clnt, server, &msg,
6307 &args.seq_args, &res.seq_res);
6308 if (status)
6309 return status;
6310
6311 renew_lease(server, now);
6312 return 0;
6313}
6314
6315#ifdef CONFIG_NFS_V4_1
6316
6317/*
6318 * This operation also signals the server that this client is
6319 * performing migration recovery. The server can stop asserting
6320 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6321 * performing this operation is identified in the SEQUENCE
6322 * operation in this compound.
6323 *
6324 * When the client supports GETATTR(fs_locations_info), it can
6325 * be plumbed in here.
6326 */
6327static int _nfs41_proc_get_locations(struct inode *inode,
6328 struct nfs4_fs_locations *locations,
6329 struct page *page, struct rpc_cred *cred)
6330{
6331 struct nfs_server *server = NFS_SERVER(inode);
6332 struct rpc_clnt *clnt = server->client;
6333 u32 bitmask[2] = {
6334 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6335 };
6336 struct nfs4_fs_locations_arg args = {
6337 .fh = NFS_FH(inode),
6338 .page = page,
6339 .bitmask = bitmask,
6340 .migration = 1, /* skip LOOKUP */
6341 };
6342 struct nfs4_fs_locations_res res = {
6343 .fs_locations = locations,
6344 .migration = 1,
6345 };
6346 struct rpc_message msg = {
6347 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6348 .rpc_argp = &args,
6349 .rpc_resp = &res,
6350 .rpc_cred = cred,
6351 };
6352 int status;
6353
6354 nfs_fattr_init(&locations->fattr);
6355 locations->server = server;
6356 locations->nlocations = 0;
6357
6358 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6359 nfs4_set_sequence_privileged(&args.seq_args);
6360 status = nfs4_call_sync_sequence(clnt, server, &msg,
6361 &args.seq_args, &res.seq_res);
6362 if (status == NFS4_OK &&
6363 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6364 status = -NFS4ERR_LEASE_MOVED;
6365 return status;
6366}
6367
6368#endif /* CONFIG_NFS_V4_1 */
6369
6370/**
6371 * nfs4_proc_get_locations - discover locations for a migrated FSID
6372 * @inode: inode on FSID that is migrating
6373 * @locations: result of query
6374 * @page: buffer
6375 * @cred: credential to use for this operation
6376 *
6377 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6378 * operation failed, or a negative errno if a local error occurred.
6379 *
6380 * On success, "locations" is filled in, but if the server has
6381 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6382 * asserted.
6383 *
6384 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6385 * from this client that require migration recovery.
6386 */
6387int nfs4_proc_get_locations(struct inode *inode,
6388 struct nfs4_fs_locations *locations,
6389 struct page *page, struct rpc_cred *cred)
6390{
6391 struct nfs_server *server = NFS_SERVER(inode);
6392 struct nfs_client *clp = server->nfs_client;
6393 const struct nfs4_mig_recovery_ops *ops =
6394 clp->cl_mvops->mig_recovery_ops;
6395 struct nfs4_exception exception = { };
6396 int status;
6397
6398 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6399 (unsigned long long)server->fsid.major,
6400 (unsigned long long)server->fsid.minor,
6401 clp->cl_hostname);
6402 nfs_display_fhandle(NFS_FH(inode), __func__);
6403
6404 do {
6405 status = ops->get_locations(inode, locations, page, cred);
6406 if (status != -NFS4ERR_DELAY)
6407 break;
6408 nfs4_handle_exception(server, status, &exception);
6409 } while (exception.retry);
6410 return status;
6411}
6412
44c99933
CL		 6413/*
6414 * This operation also signals the server that this client is
6415 * performing "lease moved" recovery. The server can stop
6416 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6417 * is appended to this compound to identify the client ID which is
6418 * performing recovery.
6419 */
6420static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6421{
6422 struct nfs_server *server = NFS_SERVER(inode);
6423 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6424 struct rpc_clnt *clnt = server->client;
6425 struct nfs4_fsid_present_arg args = {
6426 .fh = NFS_FH(inode),
6427 .clientid = clp->cl_clientid,
6428 .renew = 1, /* append RENEW */
6429 };
6430 struct nfs4_fsid_present_res res = {
6431 .renew = 1,
6432 };
6433 struct rpc_message msg = {
6434 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6435 .rpc_argp = &args,
6436 .rpc_resp = &res,
6437 .rpc_cred = cred,
6438 };
6439 unsigned long now = jiffies;
6440 int status;
6441
6442 res.fh = nfs_alloc_fhandle();
6443 if (res.fh == NULL)
6444 return -ENOMEM;
6445
6446 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6447 nfs4_set_sequence_privileged(&args.seq_args);
6448 status = nfs4_call_sync_sequence(clnt, server, &msg,
6449 &args.seq_args, &res.seq_res);
6450 nfs_free_fhandle(res.fh);
6451 if (status)
6452 return status;
6453
6454 do_renew_lease(clp, now);
6455 return 0;
6456}
6457
6458#ifdef CONFIG_NFS_V4_1
6459
6460/*
6461 * This operation also signals the server that this client is
6462 * performing "lease moved" recovery. The server can stop asserting
6463 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6464 * this operation is identified in the SEQUENCE operation in this
6465 * compound.
6466 */
6467static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6468{
6469 struct nfs_server *server = NFS_SERVER(inode);
6470 struct rpc_clnt *clnt = server->client;
6471 struct nfs4_fsid_present_arg args = {
6472 .fh = NFS_FH(inode),
6473 };
6474 struct nfs4_fsid_present_res res = {
6475 };
6476 struct rpc_message msg = {
6477 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6478 .rpc_argp = &args,
6479 .rpc_resp = &res,
6480 .rpc_cred = cred,
6481 };
6482 int status;
6483
6484 res.fh = nfs_alloc_fhandle();
6485 if (res.fh == NULL)
6486 return -ENOMEM;
6487
6488 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6489 nfs4_set_sequence_privileged(&args.seq_args);
6490 status = nfs4_call_sync_sequence(clnt, server, &msg,
6491 &args.seq_args, &res.seq_res);
6492 nfs_free_fhandle(res.fh);
6493 if (status == NFS4_OK &&
6494 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6495 status = -NFS4ERR_LEASE_MOVED;
6496 return status;
6497}
6498
6499#endif /* CONFIG_NFS_V4_1 */
6500
6501/**
6502 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6503 * @inode: inode on FSID to check
6504 * @cred: credential to use for this operation
6505 *
6506 * Server indicates whether the FSID is present, moved, or not
6507 * recognized. This operation is necessary to clear a LEASE_MOVED
6508 * condition for this client ID.
6509 *
6510 * Returns NFS4_OK if the FSID is present on this server,
6511 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6512 * NFS4ERR code if some error occurred on the server, or a
6513 * negative errno if a local failure occurred.
6514 */
6515int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6516{
6517 struct nfs_server *server = NFS_SERVER(inode);
6518 struct nfs_client *clp = server->nfs_client;
6519 const struct nfs4_mig_recovery_ops *ops =
6520 clp->cl_mvops->mig_recovery_ops;
6521 struct nfs4_exception exception = { };
6522 int status;
6523
6524 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6525 (unsigned long long)server->fsid.major,
6526 (unsigned long long)server->fsid.minor,
6527 clp->cl_hostname);
6528 nfs_display_fhandle(NFS_FH(inode), __func__);
6529
6530 do {
6531 status = ops->fsid_present(inode, cred);
6532 if (status != -NFS4ERR_DELAY)
6533 break;
6534 nfs4_handle_exception(server, status, &exception);
6535 } while (exception.retry);
6536 return status;
6537}
6538
5ec16a85 6539/**
a5250def
WAA		 6540 * If 'use_integrity' is true and the state managment nfs_client
6541 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6542 * and the machine credential as per RFC3530bis and RFC5661 Security
6543 * Considerations sections. Otherwise, just use the user cred with the
6544 * filesystem's rpc_client.
5ec16a85 6545 */
a5250def 6546static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6547{
6548 int status;
6549 struct nfs4_secinfo_arg args = {
6550 .dir_fh = NFS_FH(dir),
6551 .name = name,
6552 };
6553 struct nfs4_secinfo_res res = {
6554 .flavors = flavors,
6555 };
6556 struct rpc_message msg = {
6557 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6558 .rpc_argp = &args,
6559 .rpc_resp = &res,
6560 };
a5250def 6561 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6562 struct rpc_cred *cred = NULL;
a5250def
WAA		 6563
6564 if (use_integrity) {
6565 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6566 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6567 msg.rpc_cred = cred;
a5250def 6568 }
5a5ea0d4
BS		 6569
6570 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6571
6572 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6573 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6574
a5250def
WAA		 6575 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6576 &res.seq_res, 0);
5a5ea0d4 6577 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6578
7cb852df
WAA		 6579 if (cred)
6580 put_rpccred(cred);
a5250def 6581
5a5ea0d4
BS		 6582 return status;
6583}
6584
72de53ec
BS		 6585int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6586 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6587{
6588 struct nfs4_exception exception = { };
6589 int err;
6590 do {
a5250def
WAA		 6591 err = -NFS4ERR_WRONGSEC;
6592
6593 /* try to use integrity protection with machine cred */
6594 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6595 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6596
6597 /*
6598 * if unable to use integrity protection, or SECINFO with
6599 * integrity protection returns NFS4ERR_WRONGSEC (which is
6600 * disallowed by spec, but exists in deployed servers) use
6601 * the current filesystem's rpc_client and the user cred.
6602 */
6603 if (err == -NFS4ERR_WRONGSEC)
6604 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6605
078ea3df
TM		 6606 trace_nfs4_secinfo(dir, name, err);
6607 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6608 &exception);
6609 } while (exception.retry);
6610 return err;
6611}
6612
557134a3 6613#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6614/*
6615 * Check the exchange flags returned by the server for invalid flags, having
6616 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6617 * DS flags set.
6618 */
6619static int nfs4_check_cl_exchange_flags(u32 flags)
6620{
6621 if (flags & ~EXCHGID4_FLAG_MASK_R)
6622 goto out_inval;
6623 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6624 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6625 goto out_inval;
6626 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6627 goto out_inval;
6628 return NFS_OK;
6629out_inval:
6630 return -NFS4ERR_INVAL;
6631}
6632
78fe0f41 6633static bool
79d4e1f0
CL		 6634nfs41_same_server_scope(struct nfs41_server_scope *a,
6635 struct nfs41_server_scope *b)
78fe0f41
WAA		 6636{
6637 if (a->server_scope_sz == b->server_scope_sz &&
6638 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6639 return true;
6640
6641 return false;
6642}
6643
7c44f1ae
WAA		 6644/*
6645 * nfs4_proc_bind_conn_to_session()
6646 *
6647 * The 4.1 client currently uses the same TCP connection for the
6648 * fore and backchannel.
6649 */
2cf047c9 6650int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6651{
6652 int status;
71a097c6
TM		 6653 struct nfs41_bind_conn_to_session_args args = {
6654 .client = clp,
6655 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6656 };
7c44f1ae
WAA		 6657 struct nfs41_bind_conn_to_session_res res;
6658 struct rpc_message msg = {
6659 .rpc_proc =
6660 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 6661 .rpc_argp = &args,
7c44f1ae 6662 .rpc_resp = &res,
2cf047c9 6663 .rpc_cred = cred,
7c44f1ae
WAA		 6664 };
6665
6666 dprintk("--> %s\n", __func__);
7c44f1ae 6667
71a097c6
TM		 6668 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6669 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6670 args.dir = NFS4_CDFC4_FORE;
7c44f1ae
WAA		 6671
6672 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6673 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 6674 if (status == 0) {
71a097c6 6675 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 6676 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6677 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6678 status = -EIO;
71a097c6 6679 goto out;
7c44f1ae 6680 }
71a097c6 6681 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 6682 dprintk("NFS: %s: Unexpected direction from server\n",
6683 __func__);
6684 status = -EIO;
71a097c6 6685 goto out;
7c44f1ae 6686 }
71a097c6 6687 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 6688 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6689 __func__);
6690 status = -EIO;
71a097c6 6691 goto out;
7c44f1ae
WAA		 6692 }
6693 }
7c44f1ae
WAA		 6694out:
6695 dprintk("<-- %s status= %d\n", __func__, status);
6696 return status;
6697}
6698
99fe60d0 6699/*
fa940720
WAA		 6700 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6701 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6702 */
6703static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6704 .how = SP4_MACH_CRED,
6705 .enforce.u.words = {
6706 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6707 1 << (OP_EXCHANGE_ID - 32) |
6708 1 << (OP_CREATE_SESSION - 32) |
6709 1 << (OP_DESTROY_SESSION - 32) |
6710 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6711 },
6712 .allow.u.words = {
6713 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6714 1 << (OP_LOCKU) |
6715 1 << (OP_COMMIT),
8b5bee2e 6716 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6717 1 << (OP_SECINFO_NO_NAME - 32) |
6718 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6719 1 << (OP_FREE_STATEID - 32) |
6720 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6721 }
6722};
6723
6724/*
6725 * Select the state protection mode for client `clp' given the server results
6726 * from exchange_id in `sp'.
99fe60d0 6727 *
2031cd1a
WAA		 6728 * Returns 0 on success, negative errno otherwise.
6729 */
6730static int nfs4_sp4_select_mode(struct nfs_client *clp,
6731 struct nfs41_state_protection *sp)
6732{
6733 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6734 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6735 1 << (OP_EXCHANGE_ID - 32) |
6736 1 << (OP_CREATE_SESSION - 32) |
6737 1 << (OP_DESTROY_SESSION - 32) |
6738 1 << (OP_DESTROY_CLIENTID - 32)
6739 };
6740 unsigned int i;
6741
6742 if (sp->how == SP4_MACH_CRED) {
6743 /* Print state protect result */
6744 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6745 for (i = 0; i <= LAST_NFS4_OP; i++) {
6746 if (test_bit(i, sp->enforce.u.longs))
6747 dfprintk(MOUNT, " enforce op %d\n", i);
6748 if (test_bit(i, sp->allow.u.longs))
6749 dfprintk(MOUNT, " allow op %d\n", i);
6750 }
6751
6752 /* make sure nothing is on enforce list that isn't supported */
6753 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6754 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6755 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6756 return -EINVAL;
6757 }
6758 }
6759
6760 /*
6761 * Minimal mode - state operations are allowed to use machine
6762 * credential. Note this already happens by default, so the
6763 * client doesn't have to do anything more than the negotiation.
6764 *
6765 * NOTE: we don't care if EXCHANGE_ID is in the list -
6766 * we're already using the machine cred for exchange_id
6767 * and will never use a different cred.
6768 */
6769 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6770 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6771 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6772 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6773 dfprintk(MOUNT, "sp4_mach_cred:\n");
6774 dfprintk(MOUNT, " minimal mode enabled\n");
6775 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6776 } else {
6777 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6778 return -EINVAL;
6779 }
fa940720
WAA		 6780
6781 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6782 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6783 dfprintk(MOUNT, " cleanup mode enabled\n");
6784 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6785 }
8b5bee2e
WAA		 6786
6787 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6788 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6789 dfprintk(MOUNT, " secinfo mode enabled\n");
6790 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6791 }
3787d506
WAA		 6792
6793 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6794 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6795 dfprintk(MOUNT, " stateid mode enabled\n");
6796 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6797 }
8c21c62c
WAA		 6798
6799 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6800 dfprintk(MOUNT, " write mode enabled\n");
6801 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6802 }
6803
6804 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6805 dfprintk(MOUNT, " commit mode enabled\n");
6806 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6807 }
2031cd1a
WAA		 6808 }
6809
6810 return 0;
6811}
6812
6813/*
6814 * _nfs4_proc_exchange_id()
6bbb4ae8 6815 *
2031cd1a 6816 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6817 */
2031cd1a
WAA		 6818static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6819 u32 sp4_how)
99fe60d0
BH		 6820{
6821 nfs4_verifier verifier;
6822 struct nfs41_exchange_id_args args = {
cd93710e 6823 .verifier = &verifier,
99fe60d0 6824 .client = clp,
cd3fadec 6825#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6826 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6827 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6828 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6829#else
6830 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6831 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6832#endif
99fe60d0
BH		 6833 };
6834 struct nfs41_exchange_id_res res = {
32b01310 6835 0
99fe60d0
BH		 6836 };
6837 int status;
6838 struct rpc_message msg = {
6839 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6840 .rpc_argp = &args,
6841 .rpc_resp = &res,
6842 .rpc_cred = cred,
6843 };
99fe60d0 6844
f092075d 6845 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6846 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6847 sizeof(args.id));
6bbb4ae8
CL		 6848 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6849 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6850 args.id_len, args.id);
99fe60d0 6851
acdeb69d 6852 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6853 GFP_NOFS);
acdeb69d 6854 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6855 status = -ENOMEM;
6856 goto out;
6857 }
78fe0f41 6858
79d4e1f0 6859 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6860 GFP_NOFS);
177313f1 6861 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6862 status = -ENOMEM;
acdeb69d 6863 goto out_server_owner;
abe9a6d5 6864 }
78fe0f41 6865
bbafffd2 6866 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6867 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6868 status = -ENOMEM;
6869 goto out_server_scope;
6870 }
6871
2031cd1a
WAA		 6872 switch (sp4_how) {
6873 case SP4_NONE:
6874 args.state_protect.how = SP4_NONE;
6875 break;
6876
6877 case SP4_MACH_CRED:
6878 args.state_protect = nfs4_sp4_mach_cred_request;
6879 break;
6880
6881 default:
6882 /* unsupported! */
6883 WARN_ON_ONCE(1);
6884 status = -EINVAL;
6885 goto out_server_scope;
6886 }
6887
1bd714f2 6888 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6889 trace_nfs4_exchange_id(clp, status);
177313f1 6890 if (status == 0)
32b01310 6891 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6892
2031cd1a
WAA		 6893 if (status == 0)
6894 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6895
acdeb69d 6896 if (status == 0) {
32b01310 6897 clp->cl_clientid = res.clientid;
e11259f9
TM		 6898 clp->cl_exchange_flags = res.flags;
6899 /* Client ID is not confirmed */
6900 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
6901 clear_bit(NFS4_SESSION_ESTABLISHED,
6902 &clp->cl_session->session_state);
32b01310 6903 clp->cl_seqid = res.seqid;
e11259f9 6904 }
32b01310 6905
acdeb69d
CL		 6906 kfree(clp->cl_serverowner);
6907 clp->cl_serverowner = res.server_owner;
6908 res.server_owner = NULL;
78fe0f41 6909
7d2ed9ac 6910 /* use the most recent implementation id */
59155546
CL		 6911 kfree(clp->cl_implid);
6912 clp->cl_implid = res.impl_id;
7d2ed9ac 6913
177313f1 6914 if (clp->cl_serverscope != NULL &&
79d4e1f0 6915 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6916 res.server_scope)) {
6917 dprintk("%s: server_scope mismatch detected\n",
6918 __func__);
6919 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6920 kfree(clp->cl_serverscope);
6921 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6922 }
6923
177313f1 6924 if (clp->cl_serverscope == NULL) {
79d4e1f0 6925 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6926 goto out;
6927 }
32b01310
TM		 6928 } else
6929 kfree(res.impl_id);
7d2ed9ac 6930
acdeb69d
CL		 6931out_server_owner:
6932 kfree(res.server_owner);
7d2ed9ac 6933out_server_scope:
abe9a6d5
WAA		 6934 kfree(res.server_scope);
6935out:
177313f1 6936 if (clp->cl_implid != NULL)
6bbb4ae8 6937 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6938 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6939 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6940 clp->cl_implid->date.seconds,
6941 clp->cl_implid->date.nseconds);
6bbb4ae8 6942 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6943 return status;
6944}
6945
2031cd1a
WAA		 6946/*
6947 * nfs4_proc_exchange_id()
6948 *
6949 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6950 *
6951 * Since the clientid has expired, all compounds using sessions
6952 * associated with the stale clientid will be returning
6953 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6954 * be in some phase of session reset.
6955 *
6956 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6957 */
6958int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6959{
6960 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6961 int status;
6962
6963 /* try SP4_MACH_CRED if krb5i/p */
6964 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6965 authflavor == RPC_AUTH_GSS_KRB5P) {
6966 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6967 if (!status)
6968 return 0;
6969 }
6970
6971 /* try SP4_NONE */
6972 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6973}
6974
66245539
TM		 6975static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6976 struct rpc_cred *cred)
6977{
6978 struct rpc_message msg = {
6979 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6980 .rpc_argp = clp,
6981 .rpc_cred = cred,
6982 };
6983 int status;
6984
6985 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6986 trace_nfs4_destroy_clientid(clp, status);
66245539 6987 if (status)
02c67525 6988 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6989 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6990 return status;
6991}
6992
6993static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6994 struct rpc_cred *cred)
6995{
6996 unsigned int loop;
6997 int ret;
6998
6999 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7000 ret = _nfs4_proc_destroy_clientid(clp, cred);
7001 switch (ret) {
7002 case -NFS4ERR_DELAY:
7003 case -NFS4ERR_CLIENTID_BUSY:
7004 ssleep(1);
7005 break;
7006 default:
7007 return ret;
7008 }
7009 }
7010 return 0;
7011}
7012
7013int nfs4_destroy_clientid(struct nfs_client *clp)
7014{
7015 struct rpc_cred *cred;
7016 int ret = 0;
7017
7018 if (clp->cl_mvops->minor_version < 1)
7019 goto out;
7020 if (clp->cl_exchange_flags == 0)
7021 goto out;
05f4c350
CL		 7022 if (clp->cl_preserve_clid)
7023 goto out;
73d8bde5 7024 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7025 ret = nfs4_proc_destroy_clientid(clp, cred);
7026 if (cred)
7027 put_rpccred(cred);
7028 switch (ret) {
7029 case 0:
7030 case -NFS4ERR_STALE_CLIENTID:
7031 clp->cl_exchange_flags = 0;
7032 }
7033out:
7034 return ret;
7035}
7036
2050f0cc
AA		 7037struct nfs4_get_lease_time_data {
7038 struct nfs4_get_lease_time_args *args;
7039 struct nfs4_get_lease_time_res *res;
7040 struct nfs_client *clp;
7041};
7042
7043static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7044 void *calldata)
7045{
2050f0cc
AA		 7046 struct nfs4_get_lease_time_data *data =
7047 (struct nfs4_get_lease_time_data *)calldata;
7048
7049 dprintk("--> %s\n", __func__);
7050 /* just setup sequence, do not trigger session recovery
7051 since we're invoked within one */
d9afbd1b
TM		 7052 nfs41_setup_sequence(data->clp->cl_session,
7053 &data->args->la_seq_args,
7054 &data->res->lr_seq_res,
7055 task);
2050f0cc
AA		 7056 dprintk("<-- %s\n", __func__);
7057}
7058
7059/*
7060 * Called from nfs4_state_manager thread for session setup, so don't recover
7061 * from sequence operation or clientid errors.
7062 */
7063static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7064{
7065 struct nfs4_get_lease_time_data *data =
7066 (struct nfs4_get_lease_time_data *)calldata;
7067
7068 dprintk("--> %s\n", __func__);
14516c3a
TM		 7069 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7070 return;
2050f0cc
AA		 7071 switch (task->tk_status) {
7072 case -NFS4ERR_DELAY:
7073 case -NFS4ERR_GRACE:
7074 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7075 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7076 task->tk_status = 0;
a8a4ae3a
AA		 7077 /* fall through */
7078 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7079 rpc_restart_call_prepare(task);
2050f0cc
AA		 7080 return;
7081 }
2050f0cc
AA		 7082 dprintk("<-- %s\n", __func__);
7083}
7084
17280175 7085static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7086 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7087 .rpc_call_done = nfs4_get_lease_time_done,
7088};
7089
7090int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7091{
7092 struct rpc_task *task;
7093 struct nfs4_get_lease_time_args args;
7094 struct nfs4_get_lease_time_res res = {
7095 .lr_fsinfo = fsinfo,
7096 };
7097 struct nfs4_get_lease_time_data data = {
7098 .args = &args,
7099 .res = &res,
7100 .clp = clp,
7101 };
7102 struct rpc_message msg = {
7103 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7104 .rpc_argp = &args,
7105 .rpc_resp = &res,
7106 };
7107 struct rpc_task_setup task_setup = {
7108 .rpc_client = clp->cl_rpcclient,
7109 .rpc_message = &msg,
7110 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7111 .callback_data = &data,
7112 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7113 };
7114 int status;
7115
a9c92d6b 7116 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7117 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7118 dprintk("--> %s\n", __func__);
7119 task = rpc_run_task(&task_setup);
7120
7121 if (IS_ERR(task))
7122 status = PTR_ERR(task);
7123 else {
7124 status = task->tk_status;
7125 rpc_put_task(task);
7126 }
7127 dprintk("<-- %s return %d\n", __func__, status);
7128
7129 return status;
7130}
7131
fc931582
AA		 7132/*
7133 * Initialize the values to be used by the client in CREATE_SESSION
7134 * If nfs4_init_session set the fore channel request and response sizes,
7135 * use them.
7136 *
7137 * Set the back channel max_resp_sz_cached to zero to force the client to
7138 * always set csa_cachethis to FALSE because the current implementation
7139 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7140 */
7141static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7142{
18aad3d5
AA		 7143 unsigned int max_rqst_sz, max_resp_sz;
7144
7145 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7146 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7147
fc931582 7148 /* Fore channel attributes */
18aad3d5
AA		 7149 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7150 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7151 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7152 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7153
7154 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7155 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7156 __func__,
7157 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7158 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7159
7160 /* Back channel attributes */
fc931582
AA		 7161 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7162 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7163 args->bc_attrs.max_resp_sz_cached = 0;
7164 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7165 args->bc_attrs.max_reqs = 1;
7166
7167 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7168 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7169 __func__,
7170 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7171 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7172 args->bc_attrs.max_reqs);
7173}
7174
79969dd1
TM		 7175static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7176 struct nfs41_create_session_res *res)
8d35301d 7177{
43c2e885 7178 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7179 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7180
43c2e885
BF		 7181 if (rcvd->max_resp_sz > sent->max_resp_sz)
7182 return -EINVAL;
7183 /*
7184 * Our requested max_ops is the minimum we need; we're not
7185 * prepared to break up compounds into smaller pieces than that.
7186 * So, no point even trying to continue if the server won't
7187 * cooperate:
7188 */
7189 if (rcvd->max_ops < sent->max_ops)
7190 return -EINVAL;
7191 if (rcvd->max_reqs == 0)
7192 return -EINVAL;
b4b9a0c1
VG		 7193 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7194 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7195 return 0;
8d35301d
AA		 7196}
7197
79969dd1
TM		 7198static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7199 struct nfs41_create_session_res *res)
43c2e885
BF		 7200{
7201 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7202 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7203
b1c0df5f
TM		 7204 if (!(res->flags & SESSION4_BACK_CHAN))
7205 goto out;
43c2e885
BF		 7206 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7207 return -EINVAL;
7208 if (rcvd->max_resp_sz < sent->max_resp_sz)
7209 return -EINVAL;
7210 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7211 return -EINVAL;
7212 /* These would render the backchannel useless: */
b4b9a0c1 7213 if (rcvd->max_ops != sent->max_ops)
43c2e885 7214 return -EINVAL;
b4b9a0c1 7215 if (rcvd->max_reqs != sent->max_reqs)
43c2e885 7216 return -EINVAL;
b1c0df5f 7217out:
43c2e885
BF		 7218 return 0;
7219}
8d35301d 7220
8d35301d 7221static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7222 struct nfs41_create_session_res *res)
8d35301d 7223{
43c2e885 7224 int ret;
8d35301d 7225
79969dd1 7226 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7227 if (ret)
7228 return ret;
79969dd1
TM		 7229 return nfs4_verify_back_channel_attrs(args, res);
7230}
7231
7232static void nfs4_update_session(struct nfs4_session *session,
7233 struct nfs41_create_session_res *res)
7234{
7235 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7236 /* Mark client id and session as being confirmed */
7237 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7238 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7239 session->flags = res->flags;
7240 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7241 if (res->flags & SESSION4_BACK_CHAN)
7242 memcpy(&session->bc_attrs, &res->bc_attrs,
7243 sizeof(session->bc_attrs));
8d35301d
AA		 7244}
7245
848f5bda
TM		 7246static int _nfs4_proc_create_session(struct nfs_client *clp,
7247 struct rpc_cred *cred)
fc931582
AA		 7248{
7249 struct nfs4_session *session = clp->cl_session;
7250 struct nfs41_create_session_args args = {
7251 .client = clp,
79969dd1
TM		 7252 .clientid = clp->cl_clientid,
7253 .seqid = clp->cl_seqid,
fc931582
AA		 7254 .cb_program = NFS4_CALLBACK,
7255 };
79969dd1
TM		 7256 struct nfs41_create_session_res res;
7257
fc931582
AA		 7258 struct rpc_message msg = {
7259 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7260 .rpc_argp = &args,
7261 .rpc_resp = &res,
848f5bda 7262 .rpc_cred = cred,
fc931582
AA		 7263 };
7264 int status;
7265
7266 nfs4_init_channel_attrs(&args);
0f91421e 7267 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7268
1bd714f2 7269 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7270 trace_nfs4_create_session(clp, status);
fc931582 7271
43095d39 7272 if (!status) {
8d35301d 7273 /* Verify the session's negotiated channel_attrs values */
79969dd1 7274 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7275 /* Increment the clientid slot sequence id */
79969dd1
TM		 7276 if (clp->cl_seqid == res.seqid)
7277 clp->cl_seqid++;
7278 if (status)
7279 goto out;
7280 nfs4_update_session(session, &res);
fc931582 7281 }
79969dd1 7282out:
fc931582
AA		 7283 return status;
7284}
7285
7286/*
7287 * Issues a CREATE_SESSION operation to the server.
7288 * It is the responsibility of the caller to verify the session is
7289 * expired before calling this routine.
7290 */
848f5bda 7291int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7292{
7293 int status;
7294 unsigned *ptr;
fc931582
AA		 7295 struct nfs4_session *session = clp->cl_session;
7296
7297 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7298
848f5bda 7299 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7300 if (status)
7301 goto out;
7302
aacd5537
AA		 7303 /* Init or reset the session slot tables */
7304 status = nfs4_setup_session_slot_tables(session);
7305 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7306 if (status)
7307 goto out;
7308
7309 ptr = (unsigned *)&session->sess_id.data[0];
7310 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7311 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7312out:
7313 dprintk("<-- %s\n", __func__);
7314 return status;
7315}
7316
0f3e66c6
AA		 7317/*
7318 * Issue the over-the-wire RPC DESTROY_SESSION.
7319 * The caller must serialize access to this routine.
7320 */
848f5bda
TM		 7321int nfs4_proc_destroy_session(struct nfs4_session *session,
7322 struct rpc_cred *cred)
0f3e66c6 7323{
848f5bda
TM		 7324 struct rpc_message msg = {
7325 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7326 .rpc_argp = session,
7327 .rpc_cred = cred,
7328 };
0f3e66c6 7329 int status = 0;
0f3e66c6
AA		 7330
7331 dprintk("--> nfs4_proc_destroy_session\n");
7332
7333 /* session is still being setup */
e11259f9
TM		 7334 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7335 return 0;
0f3e66c6 7336
1bd714f2 7337 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7338 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7339
7340 if (status)
08106ac7 7341 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7342 "Session has been destroyed regardless...\n", status);
7343
7344 dprintk("<-- nfs4_proc_destroy_session\n");
7345 return status;
7346}
7347
fc01cea9
AA		 7348/*
7349 * Renew the cl_session lease.
7350 */
d5f8d3fe
TM		 7351struct nfs4_sequence_data {
7352 struct nfs_client *clp;
7353 struct nfs4_sequence_args args;
7354 struct nfs4_sequence_res res;
7355};
7356
dc96aef9
AB		 7357static void nfs41_sequence_release(void *data)
7358{
d5f8d3fe
TM		 7359 struct nfs4_sequence_data *calldata = data;
7360 struct nfs_client *clp = calldata->clp;
dc96aef9 7361
7135840f
AB		 7362 if (atomic_read(&clp->cl_count) > 1)
7363 nfs4_schedule_state_renewal(clp);
7364 nfs_put_client(clp);
d5f8d3fe 7365 kfree(calldata);
dc96aef9
AB		 7366}
7367
aa5190d0
TM		 7368static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7369{
7370 switch(task->tk_status) {
7371 case -NFS4ERR_DELAY:
aa5190d0
TM		 7372 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7373 return -EAGAIN;
7374 default:
0400a6b0 7375 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7376 }
7377 return 0;
7378}
7379
dc96aef9 7380static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7381{
d5f8d3fe
TM		 7382 struct nfs4_sequence_data *calldata = data;
7383 struct nfs_client *clp = calldata->clp;
fc01cea9 7384
14516c3a
TM		 7385 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7386 return;
fc01cea9 7387
c6d01c6f 7388 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7389 if (task->tk_status < 0) {
7390 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7391 if (atomic_read(&clp->cl_count) == 1)
7392 goto out;
fc01cea9 7393
aa5190d0
TM		 7394 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7395 rpc_restart_call_prepare(task);
fc01cea9
AA		 7396 return;
7397 }
7398 }
fc01cea9 7399 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7400out:
fc01cea9
AA		 7401 dprintk("<-- %s\n", __func__);
7402}
7403
7404static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7405{
d5f8d3fe
TM		 7406 struct nfs4_sequence_data *calldata = data;
7407 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7408 struct nfs4_sequence_args *args;
7409 struct nfs4_sequence_res *res;
7410
fc01cea9
AA		 7411 args = task->tk_msg.rpc_argp;
7412 res = task->tk_msg.rpc_resp;
7413
d9afbd1b 7414 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7415}
7416
7417static const struct rpc_call_ops nfs41_sequence_ops = {
7418 .rpc_call_done = nfs41_sequence_call_done,
7419 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7420 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7421};
7422
8fe72bac
TM		 7423static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7424 struct rpc_cred *cred,
7425 bool is_privileged)
fc01cea9 7426{
d5f8d3fe 7427 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7428 struct rpc_message msg = {
7429 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7430 .rpc_cred = cred,
7431 };
71ac6da9
TM		 7432 struct rpc_task_setup task_setup_data = {
7433 .rpc_client = clp->cl_rpcclient,
7434 .rpc_message = &msg,
8fe72bac 7435 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7436 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7437 };
fc01cea9 7438
7135840f 7439 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7440 return ERR_PTR(-EIO);
dfb4f309 7441 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7442 if (calldata == NULL) {
7135840f 7443 nfs_put_client(clp);
71ac6da9 7444 return ERR_PTR(-ENOMEM);
fc01cea9 7445 }
a9c92d6b 7446 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7447 if (is_privileged)
7448 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7449 msg.rpc_argp = &calldata->args;
7450 msg.rpc_resp = &calldata->res;
7451 calldata->clp = clp;
71ac6da9 7452 task_setup_data.callback_data = calldata;
fc01cea9 7453
71ac6da9
TM		 7454 return rpc_run_task(&task_setup_data);
7455}
7456
2f60ea6b 7457static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7458{
7459 struct rpc_task *task;
7460 int ret = 0;
7461
2f60ea6b 7462 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7463 return -EAGAIN;
8fe72bac 7464 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7465 if (IS_ERR(task))
7466 ret = PTR_ERR(task);
7467 else
bf294b41 7468 rpc_put_task_async(task);
71ac6da9
TM		 7469 dprintk("<-- %s status=%d\n", __func__, ret);
7470 return ret;
7471}
7472
7473static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7474{
7475 struct rpc_task *task;
7476 int ret;
7477
8fe72bac 7478 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7479 if (IS_ERR(task)) {
7480 ret = PTR_ERR(task);
7481 goto out;
7482 }
7483 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7484 if (!ret) {
7485 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7486
7487 if (task->tk_status == 0)
7488 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7489 ret = task->tk_status;
b4410c2f 7490 }
71ac6da9
TM		 7491 rpc_put_task(task);
7492out:
7493 dprintk("<-- %s status=%d\n", __func__, ret);
7494 return ret;
fc01cea9
AA		 7495}
7496
fce5c838
RL		 7497struct nfs4_reclaim_complete_data {
7498 struct nfs_client *clp;
7499 struct nfs41_reclaim_complete_args arg;
7500 struct nfs41_reclaim_complete_res res;
7501};
7502
7503static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7504{
7505 struct nfs4_reclaim_complete_data *calldata = data;
7506
d9afbd1b
TM		 7507 nfs41_setup_sequence(calldata->clp->cl_session,
7508 &calldata->arg.seq_args,
7509 &calldata->res.seq_res,
7510 task);
fce5c838
RL		 7511}
7512
aa5190d0
TM		 7513static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7514{
7515 switch(task->tk_status) {
7516 case 0:
7517 case -NFS4ERR_COMPLETE_ALREADY:
7518 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7519 break;
7520 case -NFS4ERR_DELAY:
aa5190d0 7521 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7522 /* fall through */
7523 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7524 return -EAGAIN;
7525 default:
0400a6b0 7526 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7527 }
7528 return 0;
7529}
7530
fce5c838
RL		 7531static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7532{
7533 struct nfs4_reclaim_complete_data *calldata = data;
7534 struct nfs_client *clp = calldata->clp;
7535 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7536
7537 dprintk("--> %s\n", __func__);
14516c3a
TM		 7538 if (!nfs41_sequence_done(task, res))
7539 return;
fce5c838 7540
c6d01c6f 7541 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7542 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7543 rpc_restart_call_prepare(task);
7544 return;
7545 }
fce5c838
RL		 7546 dprintk("<-- %s\n", __func__);
7547}
7548
7549static void nfs4_free_reclaim_complete_data(void *data)
7550{
7551 struct nfs4_reclaim_complete_data *calldata = data;
7552
7553 kfree(calldata);
7554}
7555
7556static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7557 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7558 .rpc_call_done = nfs4_reclaim_complete_done,
7559 .rpc_release = nfs4_free_reclaim_complete_data,
7560};
7561
7562/*
7563 * Issue a global reclaim complete.
7564 */
965e9c23
TM		 7565static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7566 struct rpc_cred *cred)
fce5c838
RL		 7567{
7568 struct nfs4_reclaim_complete_data *calldata;
7569 struct rpc_task *task;
7570 struct rpc_message msg = {
7571 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7572 .rpc_cred = cred,
fce5c838
RL		 7573 };
7574 struct rpc_task_setup task_setup_data = {
7575 .rpc_client = clp->cl_rpcclient,
7576 .rpc_message = &msg,
7577 .callback_ops = &nfs4_reclaim_complete_call_ops,
7578 .flags = RPC_TASK_ASYNC,
7579 };
7580 int status = -ENOMEM;
7581
7582 dprintk("--> %s\n", __func__);
8535b2be 7583 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7584 if (calldata == NULL)
7585 goto out;
7586 calldata->clp = clp;
7587 calldata->arg.one_fs = 0;
fce5c838 7588
a9c92d6b 7589 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7590 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7591 msg.rpc_argp = &calldata->arg;
7592 msg.rpc_resp = &calldata->res;
7593 task_setup_data.callback_data = calldata;
7594 task = rpc_run_task(&task_setup_data);
acf82b85 7595 if (IS_ERR(task)) {
fce5c838 7596 status = PTR_ERR(task);
acf82b85
DC		 7597 goto out;
7598 }
c34c32ea
AA		 7599 status = nfs4_wait_for_completion_rpc_task(task);
7600 if (status == 0)
7601 status = task->tk_status;
fce5c838 7602 rpc_put_task(task);
acf82b85 7603 return 0;
fce5c838
RL		 7604out:
7605 dprintk("<-- %s status=%d\n", __func__, status);
7606 return status;
7607}
b1f69b75
AA		 7608
7609static void
7610nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7611{
7612 struct nfs4_layoutget *lgp = calldata;
c31663d4 7613 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7614 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7615
7616 dprintk("--> %s\n", __func__);
c31663d4
FI		 7617 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7618 * right now covering the LAYOUTGET we are about to send.
7619 * However, that is not so catastrophic, and there seems
7620 * to be no way to prevent it completely.
7621 */
6ba7db34 7622 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7623 &lgp->res.seq_res, task))
b1f69b75 7624 return;
cf7d63f1
FI		 7625 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7626 NFS_I(lgp->args.inode)->layout,
ce6ab4f2 7627 &lgp->args.range,
cf7d63f1
FI		 7628 lgp->args.ctx->state)) {
7629 rpc_exit(task, NFS4_OK);
cf7d63f1 7630 }
b1f69b75
AA		 7631}
7632
7633static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7634{
7635 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7636 struct inode *inode = lgp->args.inode;
7637 struct nfs_server *server = NFS_SERVER(inode);
7638 struct pnfs_layout_hdr *lo;
7639 struct nfs4_state *state = NULL;
ed7e5423 7640 unsigned long timeo, now, giveup;
b1f69b75 7641
ed7e5423 7642 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7643
6ba7db34 7644 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7645 goto out;
b1f69b75
AA		 7646
7647 switch (task->tk_status) {
7648 case 0:
ee314c2a 7649 goto out;
ed7e5423
BH		 7650 /*
7651 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7652 * (or clients) writing to the same RAID stripe
7653 */
b1f69b75 7654 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7655 /*
7656 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7657 * existing layout before getting a new one).
7658 */
b1f69b75 7659 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7660 timeo = rpc_get_timeout(task->tk_client);
7661 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7662 now = jiffies;
7663 if (time_after(giveup, now)) {
7664 unsigned long delay;
7665
7666 /* Delay for:
7667 * - Not less then NFS4_POLL_RETRY_MIN.
7668 * - One last time a jiffie before we give up
7669 * - exponential backoff (time_now minus start_attempt)
7670 */
7671 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7672 min((giveup - now - 1),
7673 now - lgp->args.timestamp));
7674
7675 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7676 __func__, delay);
7677 rpc_delay(task, delay);
7678 task->tk_status = 0;
7679 rpc_restart_call_prepare(task);
7680 goto out; /* Do not call nfs4_async_handle_error() */
7681 }
ee314c2a
TM		 7682 break;
7683 case -NFS4ERR_EXPIRED:
7684 case -NFS4ERR_BAD_STATEID:
7685 spin_lock(&inode->i_lock);
7686 lo = NFS_I(inode)->layout;
7687 if (!lo || list_empty(&lo->plh_segs)) {
7688 spin_unlock(&inode->i_lock);
7689 /* If the open stateid was bad, then recover it. */
7690 state = lgp->args.ctx->state;
7691 } else {
7692 LIST_HEAD(head);
7693
defb8460
CH		 7694 /*
7695 * Mark the bad layout state as invalid, then retry
7696 * with the current stateid.
7697 */
ee314c2a
TM		 7698 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7699 spin_unlock(&inode->i_lock);
ee314c2a 7700 pnfs_free_lseg_list(&head);
defb8460
CH		 7701
7702 task->tk_status = 0;
7703 rpc_restart_call_prepare(task);
b1f69b75
AA		 7704 }
7705 }
8478eaa1 7706 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
ee314c2a
TM		 7707 rpc_restart_call_prepare(task);
7708out:
b1f69b75
AA		 7709 dprintk("<-- %s\n", __func__);
7710}
7711
8554116e
IK		 7712static size_t max_response_pages(struct nfs_server *server)
7713{
7714 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7715 return nfs_page_array_len(0, max_resp_sz);
7716}
7717
7718static void nfs4_free_pages(struct page **pages, size_t size)
7719{
7720 int i;
7721
7722 if (!pages)
7723 return;
7724
7725 for (i = 0; i < size; i++) {
7726 if (!pages[i])
7727 break;
7728 __free_page(pages[i]);
7729 }
7730 kfree(pages);
7731}
7732
7733static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7734{
7735 struct page **pages;
7736 int i;
7737
7738 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7739 if (!pages) {
7740 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7741 return NULL;
7742 }
7743
7744 for (i = 0; i < size; i++) {
7745 pages[i] = alloc_page(gfp_flags);
7746 if (!pages[i]) {
7747 dprintk("%s: failed to allocate page\n", __func__);
7748 nfs4_free_pages(pages, size);
7749 return NULL;
7750 }
7751 }
7752
7753 return pages;
7754}
7755
b1f69b75
AA		 7756static void nfs4_layoutget_release(void *calldata)
7757{
7758 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7759 struct inode *inode = lgp->args.inode;
7760 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7761 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7762
7763 dprintk("--> %s\n", __func__);
8554116e 7764 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7765 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7766 put_nfs_open_context(lgp->args.ctx);
7767 kfree(calldata);
7768 dprintk("<-- %s\n", __func__);
7769}
7770
7771static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7772 .rpc_call_prepare = nfs4_layoutget_prepare,
7773 .rpc_call_done = nfs4_layoutget_done,
7774 .rpc_release = nfs4_layoutget_release,
7775};
7776
a0b0a6e3
TM		 7777struct pnfs_layout_segment *
7778nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7779{
a47970ff
WAA		 7780 struct inode *inode = lgp->args.inode;
7781 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7782 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7783 struct rpc_task *task;
7784 struct rpc_message msg = {
7785 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7786 .rpc_argp = &lgp->args,
7787 .rpc_resp = &lgp->res,
6ab59344 7788 .rpc_cred = lgp->cred,
b1f69b75
AA		 7789 };
7790 struct rpc_task_setup task_setup_data = {
7791 .rpc_client = server->client,
7792 .rpc_message = &msg,
7793 .callback_ops = &nfs4_layoutget_call_ops,
7794 .callback_data = lgp,
7795 .flags = RPC_TASK_ASYNC,
7796 };
a0b0a6e3 7797 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7798 int status = 0;
7799
7800 dprintk("--> %s\n", __func__);
7801
4bd5a980
PT		 7802 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7803 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7804
8554116e
IK		 7805 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7806 if (!lgp->args.layout.pages) {
7807 nfs4_layoutget_release(lgp);
a0b0a6e3 7808 return ERR_PTR(-ENOMEM);
8554116e
IK		 7809 }
7810 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7811 lgp->args.timestamp = jiffies;
8554116e 7812
35124a09 7813 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7814 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7815 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 7816
b1f69b75
AA		 7817 task = rpc_run_task(&task_setup_data);
7818 if (IS_ERR(task))
a0b0a6e3 7819 return ERR_CAST(task);
b1f69b75 7820 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7821 if (status == 0)
7822 status = task->tk_status;
1037e6ea
TM		 7823 trace_nfs4_layoutget(lgp->args.ctx,
7824 &lgp->args.range,
7825 &lgp->res.range,
7826 status);
085b7a45
WAA		 7827 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7828 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7829 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7830 rpc_put_task(task);
7831 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7832 if (status)
7833 return ERR_PTR(status);
7834 return lseg;
b1f69b75
AA		 7835}
7836
cbe82603
BH		 7837static void
7838nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7839{
7840 struct nfs4_layoutreturn *lrp = calldata;
7841
7842 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7843 nfs41_setup_sequence(lrp->clp->cl_session,
7844 &lrp->args.seq_args,
7845 &lrp->res.seq_res,
7846 task);
cbe82603
BH		 7847}
7848
7849static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7850{
7851 struct nfs4_layoutreturn *lrp = calldata;
7852 struct nfs_server *server;
7853
7854 dprintk("--> %s\n", __func__);
7855
6ba7db34 7856 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7857 return;
7858
7859 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7860 switch (task->tk_status) {
7861 default:
7862 task->tk_status = 0;
7863 case 0:
7864 break;
7865 case -NFS4ERR_DELAY:
8478eaa1 7866 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 7867 break;
d00c5d43 7868 rpc_restart_call_prepare(task);
cbe82603
BH		 7869 return;
7870 }
cbe82603
BH		 7871 dprintk("<-- %s\n", __func__);
7872}
7873
7874static void nfs4_layoutreturn_release(void *calldata)
7875{
7876 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7877 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7878
7879 dprintk("--> %s\n", __func__);
849b286f
TM		 7880 spin_lock(&lo->plh_inode->i_lock);
7881 if (lrp->res.lrs_present)
7882 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
d67ae825 7883 pnfs_clear_layoutreturn_waitbit(lo);
193e3aa2
PT		 7884 clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, &lo->plh_flags);
7885 rpc_wake_up(&NFS_SERVER(lo->plh_inode)->roc_rpcwaitq);
849b286f
TM		 7886 lo->plh_block_lgets--;
7887 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7888 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 7889 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 7890 kfree(calldata);
7891 dprintk("<-- %s\n", __func__);
7892}
7893
7894static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7895 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7896 .rpc_call_done = nfs4_layoutreturn_done,
7897 .rpc_release = nfs4_layoutreturn_release,
7898};
7899
6c16605d 7900int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 7901{
7902 struct rpc_task *task;
7903 struct rpc_message msg = {
7904 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7905 .rpc_argp = &lrp->args,
7906 .rpc_resp = &lrp->res,
9556000d 7907 .rpc_cred = lrp->cred,
cbe82603
BH		 7908 };
7909 struct rpc_task_setup task_setup_data = {
1771c577 7910 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7911 .rpc_message = &msg,
7912 .callback_ops = &nfs4_layoutreturn_call_ops,
7913 .callback_data = lrp,
7914 };
6c16605d 7915 int status = 0;
cbe82603
BH		 7916
7917 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 7918 if (!sync) {
7919 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
7920 if (!lrp->inode) {
7921 nfs4_layoutreturn_release(lrp);
7922 return -EAGAIN;
7923 }
7924 task_setup_data.flags |= RPC_TASK_ASYNC;
7925 }
a9c92d6b 7926 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7927 task = rpc_run_task(&task_setup_data);
7928 if (IS_ERR(task))
7929 return PTR_ERR(task);
5a0ec8ac
TM		 7930 if (sync)
7931 status = task->tk_status;
1037e6ea 7932 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7933 dprintk("<-- %s status=%d\n", __func__, status);
7934 rpc_put_task(task);
7935 return status;
7936}
7937
b1f69b75 7938static int
cd5875fe
TM		 7939_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7940 struct pnfs_device *pdev,
7941 struct rpc_cred *cred)
b1f69b75
AA		 7942{
7943 struct nfs4_getdeviceinfo_args args = {
7944 .pdev = pdev,
4e590803
TM		 7945 .notify_types = NOTIFY_DEVICEID4_CHANGE |
7946 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 7947 };
7948 struct nfs4_getdeviceinfo_res res = {
7949 .pdev = pdev,
7950 };
7951 struct rpc_message msg = {
7952 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7953 .rpc_argp = &args,
7954 .rpc_resp = &res,
cd5875fe 7955 .rpc_cred = cred,
b1f69b75
AA		 7956 };
7957 int status;
7958
7959 dprintk("--> %s\n", __func__);
7c513058 7960 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 7961 if (res.notification & ~args.notify_types)
7962 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 7963 if (res.notification != args.notify_types)
7964 pdev->nocache = 1;
4e590803 7965
b1f69b75
AA		 7966 dprintk("<-- %s status=%d\n", __func__, status);
7967
7968 return status;
7969}
7970
cd5875fe
TM		 7971int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7972 struct pnfs_device *pdev,
7973 struct rpc_cred *cred)
b1f69b75
AA		 7974{
7975 struct nfs4_exception exception = { };
7976 int err;
7977
7978 do {
7979 err = nfs4_handle_exception(server,
cd5875fe 7980 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7981 &exception);
7982 } while (exception.retry);
7983 return err;
7984}
7985EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7986
863a3c6c
AA		 7987static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7988{
7989 struct nfs4_layoutcommit_data *data = calldata;
7990 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7991 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7992
d9afbd1b
TM		 7993 nfs41_setup_sequence(session,
7994 &data->args.seq_args,
7995 &data->res.seq_res,
7996 task);
863a3c6c
AA		 7997}
7998
7999static void
8000nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8001{
8002 struct nfs4_layoutcommit_data *data = calldata;
8003 struct nfs_server *server = NFS_SERVER(data->args.inode);
8004
6ba7db34 8005 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8006 return;
8007
8008 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8009 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8010 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8011 case -NFS4ERR_BADLAYOUT: /* no layout */
8012 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8013 task->tk_status = 0;
e59d27e0 8014 case 0:
e59d27e0
TM		 8015 break;
8016 default:
8478eaa1 8017 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8018 rpc_restart_call_prepare(task);
8019 return;
8020 }
8021 }
863a3c6c
AA		 8022}
8023
8024static void nfs4_layoutcommit_release(void *calldata)
8025{
8026 struct nfs4_layoutcommit_data *data = calldata;
8027
db29c089 8028 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8029 nfs_post_op_update_inode_force_wcc(data->args.inode,
8030 data->res.fattr);
863a3c6c 8031 put_rpccred(data->cred);
472e2594 8032 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8033 kfree(data);
8034}
8035
8036static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8037 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8038 .rpc_call_done = nfs4_layoutcommit_done,
8039 .rpc_release = nfs4_layoutcommit_release,
8040};
8041
8042int
ef311537 8043nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8044{
8045 struct rpc_message msg = {
8046 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8047 .rpc_argp = &data->args,
8048 .rpc_resp = &data->res,
8049 .rpc_cred = data->cred,
8050 };
8051 struct rpc_task_setup task_setup_data = {
8052 .task = &data->task,
8053 .rpc_client = NFS_CLIENT(data->args.inode),
8054 .rpc_message = &msg,
8055 .callback_ops = &nfs4_layoutcommit_ops,
8056 .callback_data = data,
863a3c6c
AA		 8057 };
8058 struct rpc_task *task;
8059 int status = 0;
8060
8061 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
8062 "lbw: %llu inode %lu\n",
8063 data->task.tk_pid, sync,
8064 data->args.lastbytewritten,
8065 data->args.inode->i_ino);
8066
472e2594
TM		 8067 if (!sync) {
8068 data->inode = nfs_igrab_and_active(data->args.inode);
8069 if (data->inode == NULL) {
8070 nfs4_layoutcommit_release(data);
8071 return -EAGAIN;
8072 }
8073 task_setup_data.flags = RPC_TASK_ASYNC;
8074 }
a9c92d6b 8075 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8076 task = rpc_run_task(&task_setup_data);
8077 if (IS_ERR(task))
8078 return PTR_ERR(task);
472e2594
TM		 8079 if (sync)
8080 status = task->tk_status;
1037e6ea 8081 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 8082 dprintk("%s: status %d\n", __func__, status);
8083 rpc_put_task(task);
8084 return status;
8085}
fca78d6d 8086
97431204
AA		 8087/**
8088 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8089 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8090 */
fca78d6d
BS		 8091static int
8092_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8093 struct nfs_fsinfo *info,
8094 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8095{
8096 struct nfs41_secinfo_no_name_args args = {
8097 .style = SECINFO_STYLE_CURRENT_FH,
8098 };
8099 struct nfs4_secinfo_res res = {
8100 .flavors = flavors,
8101 };
8102 struct rpc_message msg = {
8103 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8104 .rpc_argp = &args,
8105 .rpc_resp = &res,
8106 };
b1b3e136 8107 struct rpc_clnt *clnt = server->client;
7cb852df 8108 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8109 int status;
8110
8111 if (use_integrity) {
8112 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8113 cred = nfs4_get_clid_cred(server->nfs_client);
8114 msg.rpc_cred = cred;
b1b3e136
WAA		 8115 }
8116
8117 dprintk("--> %s\n", __func__);
8118 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8119 &res.seq_res, 0);
8120 dprintk("<-- %s status=%d\n", __func__, status);
8121
7cb852df
WAA		 8122 if (cred)
8123 put_rpccred(cred);
b1b3e136
WAA		 8124
8125 return status;
fca78d6d
BS		 8126}
8127
8128static int
8129nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8130 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8131{
8132 struct nfs4_exception exception = { };
8133 int err;
8134 do {
b1b3e136
WAA		 8135 /* first try using integrity protection */
8136 err = -NFS4ERR_WRONGSEC;
8137
8138 /* try to use integrity protection with machine cred */
8139 if (_nfs4_is_integrity_protected(server->nfs_client))
8140 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8141 flavors, true);
8142
8143 /*
8144 * if unable to use integrity protection, or SECINFO with
8145 * integrity protection returns NFS4ERR_WRONGSEC (which is
8146 * disallowed by spec, but exists in deployed servers) use
8147 * the current filesystem's rpc_client and the user cred.
8148 */
8149 if (err == -NFS4ERR_WRONGSEC)
8150 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8151 flavors, false);
8152
fca78d6d
BS		 8153 switch (err) {
8154 case 0:
8155 case -NFS4ERR_WRONGSEC:
78b19bae 8156 case -ENOTSUPP:
05e9cfb4 8157 goto out;
fca78d6d
BS		 8158 default:
8159 err = nfs4_handle_exception(server, err, &exception);
8160 }
8161 } while (exception.retry);
05e9cfb4 8162out:
fca78d6d
BS		 8163 return err;
8164}
8165
8166static int
8167nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8168 struct nfs_fsinfo *info)
8169{
8170 int err;
8171 struct page *page;
367156d9 8172 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8173 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8174 struct nfs4_secinfo4 *secinfo;
8175 int i;
fca78d6d
BS		 8176
8177 page = alloc_page(GFP_KERNEL);
8178 if (!page) {
8179 err = -ENOMEM;
8180 goto out;
8181 }
8182
8183 flavors = page_address(page);
8184 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8185
8186 /*
8187 * Fall back on "guess and check" method if
8188 * the server doesn't support SECINFO_NO_NAME
8189 */
78b19bae 8190 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8191 err = nfs4_find_root_sec(server, fhandle, info);
8192 goto out_freepage;
8193 }
8194 if (err)
8195 goto out_freepage;
8196
58a8cf12
WAA		 8197 for (i = 0; i < flavors->num_flavors; i++) {
8198 secinfo = &flavors->flavors[i];
8199
8200 switch (secinfo->flavor) {
8201 case RPC_AUTH_NULL:
8202 case RPC_AUTH_UNIX:
8203 case RPC_AUTH_GSS:
8204 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8205 &secinfo->flavor_info);
8206 break;
8207 default:
8208 flavor = RPC_AUTH_MAXFLAVOR;
8209 break;
8210 }
8211
4d4b69dd
WAA		 8212 if (!nfs_auth_info_match(&server->auth_info, flavor))
8213 flavor = RPC_AUTH_MAXFLAVOR;
8214
58a8cf12
WAA		 8215 if (flavor != RPC_AUTH_MAXFLAVOR) {
8216 err = nfs4_lookup_root_sec(server, fhandle,
8217 info, flavor);
8218 if (!err)
8219 break;
8220 }
8221 }
8222
8223 if (flavor == RPC_AUTH_MAXFLAVOR)
8224 err = -EPERM;
fca78d6d
BS		 8225
8226out_freepage:
8227 put_page(page);
8228 if (err == -EACCES)
8229 return -EPERM;
8230out:
8231 return err;
8232}
1cab0652 8233
ab7cb0df
TM		 8234static int _nfs41_test_stateid(struct nfs_server *server,
8235 nfs4_stateid *stateid,
8236 struct rpc_cred *cred)
7d974794
BS		 8237{
8238 int status;
8239 struct nfs41_test_stateid_args args = {
1cab0652 8240 .stateid = stateid,
7d974794
BS		 8241 };
8242 struct nfs41_test_stateid_res res;
8243 struct rpc_message msg = {
8244 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8245 .rpc_argp = &args,
8246 .rpc_resp = &res,
ab7cb0df 8247 .rpc_cred = cred,
7d974794 8248 };
3787d506
WAA		 8249 struct rpc_clnt *rpc_client = server->client;
8250
8251 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8252 &rpc_client, &msg);
1cab0652 8253
38527b15 8254 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8255 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8256 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8257 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8258 &args.seq_args, &res.seq_res);
38527b15
CL		 8259 if (status != NFS_OK) {
8260 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8261 return status;
38527b15
CL		 8262 }
8263 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8264 return -res.status;
7d974794
BS		 8265}
8266
38527b15
CL		 8267/**
8268 * nfs41_test_stateid - perform a TEST_STATEID operation
8269 *
8270 * @server: server / transport on which to perform the operation
8271 * @stateid: state ID to test
ab7cb0df 8272 * @cred: credential
38527b15
CL		 8273 *
8274 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8275 * Otherwise a negative NFS4ERR value is returned if the operation
8276 * failed or the state ID is not currently valid.
8277 */
ab7cb0df
TM		 8278static int nfs41_test_stateid(struct nfs_server *server,
8279 nfs4_stateid *stateid,
8280 struct rpc_cred *cred)
7d974794
BS		 8281{
8282 struct nfs4_exception exception = { };
8283 int err;
8284 do {
ab7cb0df 8285 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8286 if (err != -NFS4ERR_DELAY)
8287 break;
8288 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8289 } while (exception.retry);
8290 return err;
8291}
9aeda35f 8292
7c1d5fae
TM		 8293struct nfs_free_stateid_data {
8294 struct nfs_server *server;
8295 struct nfs41_free_stateid_args args;
9aeda35f 8296 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8297};
8298
8299static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8300{
8301 struct nfs_free_stateid_data *data = calldata;
8302 nfs41_setup_sequence(nfs4_get_session(data->server),
8303 &data->args.seq_args,
8304 &data->res.seq_res,
8305 task);
8306}
8307
8308static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8309{
8310 struct nfs_free_stateid_data *data = calldata;
8311
8312 nfs41_sequence_done(task, &data->res.seq_res);
8313
8314 switch (task->tk_status) {
8315 case -NFS4ERR_DELAY:
8478eaa1 8316 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8317 rpc_restart_call_prepare(task);
8318 }
8319}
8320
8321static void nfs41_free_stateid_release(void *calldata)
8322{
8323 kfree(calldata);
8324}
8325
17f26b12 8326static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8327 .rpc_call_prepare = nfs41_free_stateid_prepare,
8328 .rpc_call_done = nfs41_free_stateid_done,
8329 .rpc_release = nfs41_free_stateid_release,
8330};
8331
8332static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8333 nfs4_stateid *stateid,
ab7cb0df 8334 struct rpc_cred *cred,
7c1d5fae
TM		 8335 bool privileged)
8336{
9aeda35f
BS		 8337 struct rpc_message msg = {
8338 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8339 .rpc_cred = cred,
9aeda35f 8340 };
7c1d5fae
TM		 8341 struct rpc_task_setup task_setup = {
8342 .rpc_client = server->client,
8343 .rpc_message = &msg,
8344 .callback_ops = &nfs41_free_stateid_ops,
8345 .flags = RPC_TASK_ASYNC,
8346 };
8347 struct nfs_free_stateid_data *data;
9aeda35f 8348
3787d506
WAA		 8349 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8350 &task_setup.rpc_client, &msg);
8351
38527b15 8352 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8353 data = kmalloc(sizeof(*data), GFP_NOFS);
8354 if (!data)
8355 return ERR_PTR(-ENOMEM);
8356 data->server = server;
8357 nfs4_stateid_copy(&data->args.stateid, stateid);
8358
8359 task_setup.callback_data = data;
8360
8361 msg.rpc_argp = &data->args;
8362 msg.rpc_resp = &data->res;
a9c92d6b 8363 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8364 if (privileged)
8365 nfs4_set_sequence_privileged(&data->args.seq_args);
8366
8367 return rpc_run_task(&task_setup);
9aeda35f
BS		 8368}
8369
38527b15
CL		 8370/**
8371 * nfs41_free_stateid - perform a FREE_STATEID operation
8372 *
8373 * @server: server / transport on which to perform the operation
8374 * @stateid: state ID to release
ab7cb0df 8375 * @cred: credential
38527b15
CL		 8376 *
8377 * Returns NFS_OK if the server freed "stateid". Otherwise a
8378 * negative NFS4ERR value is returned.
8379 */
ab7cb0df
TM		 8380static int nfs41_free_stateid(struct nfs_server *server,
8381 nfs4_stateid *stateid,
8382 struct rpc_cred *cred)
9aeda35f 8383{
7c1d5fae
TM		 8384 struct rpc_task *task;
8385 int ret;
8386
ab7cb0df 8387 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8388 if (IS_ERR(task))
8389 return PTR_ERR(task);
8390 ret = rpc_wait_for_completion_task(task);
8391 if (!ret)
8392 ret = task->tk_status;
8393 rpc_put_task(task);
8394 return ret;
9aeda35f 8395}
36281caa 8396
f1cdae87
JL		 8397static void
8398nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8399{
8400 struct rpc_task *task;
ab7cb0df 8401 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8402
ab7cb0df 8403 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8404 nfs4_free_lock_state(server, lsp);
8405 if (IS_ERR(task))
f1cdae87 8406 return;
c8b2d0bf 8407 rpc_put_task(task);
c8b2d0bf
TM		 8408}
8409
36281caa
TM		 8410static bool nfs41_match_stateid(const nfs4_stateid *s1,
8411 const nfs4_stateid *s2)
8412{
2d2f24ad 8413 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8414 return false;
8415
2d2f24ad 8416 if (s1->seqid == s2->seqid)
36281caa 8417 return true;
2d2f24ad 8418 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8419 return true;
8420
8421 return false;
8422}
8423
557134a3
AA		 8424#endif /* CONFIG_NFS_V4_1 */
8425
36281caa
TM		 8426static bool nfs4_match_stateid(const nfs4_stateid *s1,
8427 const nfs4_stateid *s2)
8428{
f597c537 8429 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8430}
8431
8432
17280175 8433static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8434 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8435 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8436 .recover_open = nfs4_open_reclaim,
8437 .recover_lock = nfs4_lock_reclaim,
591d71cb 8438 .establish_clid = nfs4_init_clientid,
05f4c350 8439 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8440};
8441
591d71cb 8442#if defined(CONFIG_NFS_V4_1)
17280175 8443static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8444 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8445 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8446 .recover_open = nfs4_open_reclaim,
8447 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8448 .establish_clid = nfs41_init_clientid,
fce5c838 8449 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8450 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8451};
8452#endif /* CONFIG_NFS_V4_1 */
8453
17280175 8454static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8455 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8456 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8457 .recover_open = nfs40_open_expired,
591d71cb
AA		 8458 .recover_lock = nfs4_lock_expired,
8459 .establish_clid = nfs4_init_clientid,
8460};
8461
8462#if defined(CONFIG_NFS_V4_1)
17280175 8463static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8464 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8465 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8466 .recover_open = nfs41_open_expired,
8467 .recover_lock = nfs41_lock_expired,
4d643d1d 8468 .establish_clid = nfs41_init_clientid,
1da177e4 8469};
591d71cb 8470#endif /* CONFIG_NFS_V4_1 */
1da177e4 8471
17280175 8472static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8473 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8474 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8475 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8476};
8477
8478#if defined(CONFIG_NFS_V4_1)
17280175 8479static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8480 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8481 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8482 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8483};
8484#endif
8485
ec011fe8 8486static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8487 .get_locations = _nfs40_proc_get_locations,
44c99933 8488 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8489};
8490
8491#if defined(CONFIG_NFS_V4_1)
8492static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8493 .get_locations = _nfs41_proc_get_locations,
44c99933 8494 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8495};
8496#endif /* CONFIG_NFS_V4_1 */
8497
97dc1359
TM		 8498static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8499 .minor_version = 0,
39c6daae
TM		 8500 .init_caps = NFS_CAP_READDIRPLUS
8501 | NFS_CAP_ATOMIC_OPEN
8502 | NFS_CAP_CHANGE_ATTR
8503 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8504 .init_client = nfs40_init_client,
8505 .shutdown_client = nfs40_shutdown_client,
36281caa 8506 .match_stateid = nfs4_match_stateid,
fca78d6d 8507 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8508 .free_lock_state = nfs4_release_lockowner,
63f5f796 8509 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8510 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8511 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8512 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8513 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8514 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8515};
8516
8517#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8518static struct nfs_seqid *
8519nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8520{
8521 return NULL;
8522}
8523
97dc1359
TM		 8524static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8525 .minor_version = 1,
39c6daae
TM		 8526 .init_caps = NFS_CAP_READDIRPLUS
8527 | NFS_CAP_ATOMIC_OPEN
8528 | NFS_CAP_CHANGE_ATTR
3b66486c 8529 | NFS_CAP_POSIX_LOCK
49f9a0fa 8530 | NFS_CAP_STATEID_NFSV41
e983120e 8531 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8532 .init_client = nfs41_init_client,
8533 .shutdown_client = nfs41_shutdown_client,
36281caa 8534 .match_stateid = nfs41_match_stateid,
fca78d6d 8535 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8536 .free_lock_state = nfs41_free_lock_state,
63f5f796 8537 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8538 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8539 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8540 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8541 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8542 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8543};
8544#endif
8545
42c2c424
SD		 8546#if defined(CONFIG_NFS_V4_2)
8547static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8548 .minor_version = 2,
7017310a
BS		 8549 .init_caps = NFS_CAP_READDIRPLUS
8550 | NFS_CAP_ATOMIC_OPEN
8551 | NFS_CAP_CHANGE_ATTR
8552 | NFS_CAP_POSIX_LOCK
8553 | NFS_CAP_STATEID_NFSV41
e983120e 8554 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8555 | NFS_CAP_ALLOCATE
624bd5b7 8556 | NFS_CAP_DEALLOCATE
e983120e 8557 | NFS_CAP_SEEK,
abf79bb3
CL		 8558 .init_client = nfs41_init_client,
8559 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8560 .match_stateid = nfs41_match_stateid,
8561 .find_root_sec = nfs41_find_root_sec,
7017310a 8562 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8563 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8564 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8565 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8566 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8567 .state_renewal_ops = &nfs41_state_renewal_ops,
8568};
8569#endif
8570
97dc1359
TM		 8571const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8572 [0] = &nfs_v4_0_minor_ops,
8573#if defined(CONFIG_NFS_V4_1)
8574 [1] = &nfs_v4_1_minor_ops,
8575#endif
42c2c424
SD		 8576#if defined(CONFIG_NFS_V4_2)
8577 [2] = &nfs_v4_2_minor_ops,
8578#endif
97dc1359
TM		 8579};
8580
17f26b12 8581static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8582 .create = nfs_create,
8583 .lookup = nfs_lookup,
8584 .atomic_open = nfs_atomic_open,
8585 .link = nfs_link,
8586 .unlink = nfs_unlink,
8587 .symlink = nfs_symlink,
8588 .mkdir = nfs_mkdir,
8589 .rmdir = nfs_rmdir,
8590 .mknod = nfs_mknod,
8591 .rename = nfs_rename,
8592 .permission = nfs_permission,
8593 .getattr = nfs_getattr,
8594 .setattr = nfs_setattr,
8595 .getxattr = generic_getxattr,
8596 .setxattr = generic_setxattr,
8597 .listxattr = generic_listxattr,
8598 .removexattr = generic_removexattr,
8599};
8600
92e1d5be 8601static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8602 .permission = nfs_permission,
8603 .getattr = nfs_getattr,
8604 .setattr = nfs_setattr,
64c2ce8b
AK		 8605 .getxattr = generic_getxattr,
8606 .setxattr = generic_setxattr,
8607 .listxattr = generic_listxattr,
8608 .removexattr = generic_removexattr,
6b3b5496
BF		 8609};
8610
509de811 8611const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8612 .version = 4, /* protocol version */
8613 .dentry_ops = &nfs4_dentry_operations,
8614 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8615 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8616 .file_ops = &nfs4_file_operations,
1da177e4 8617 .getroot = nfs4_proc_get_root,
281cad46 8618 .submount = nfs4_submount,
ff9099f2 8619 .try_mount = nfs4_try_mount,
1da177e4
LT		 8620 .getattr = nfs4_proc_getattr,
8621 .setattr = nfs4_proc_setattr,
8622 .lookup = nfs4_proc_lookup,
8623 .access = nfs4_proc_access,
8624 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8625 .create = nfs4_proc_create,
8626 .remove = nfs4_proc_remove,
8627 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8628 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8629 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8630 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8631 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8632 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8633 .link = nfs4_proc_link,
8634 .symlink = nfs4_proc_symlink,
8635 .mkdir = nfs4_proc_mkdir,
8636 .rmdir = nfs4_proc_remove,
8637 .readdir = nfs4_proc_readdir,
8638 .mknod = nfs4_proc_mknod,
8639 .statfs = nfs4_proc_statfs,
8640 .fsinfo = nfs4_proc_fsinfo,
8641 .pathconf = nfs4_proc_pathconf,
e9326dca 8642 .set_capabilities = nfs4_server_capabilities,
1da177e4 8643 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8644 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8645 .read_setup = nfs4_proc_read_setup,
ec06c096 8646 .read_done = nfs4_read_done,
1da177e4 8647 .write_setup = nfs4_proc_write_setup,
788e7a89 8648 .write_done = nfs4_write_done,
1da177e4 8649 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8650 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8651 .commit_done = nfs4_commit_done,
1da177e4 8652 .lock = nfs4_proc_lock,
e50a1c2e 8653 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8654 .close_context = nfs4_close_context,
2b484297 8655 .open_context = nfs4_atomic_open,
011e2a7f 8656 .have_delegation = nfs4_have_delegation,
57ec14c5 8657 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8658 .alloc_client = nfs4_alloc_client,
45a52a02 8659 .init_client = nfs4_init_client,
cdb7eced 8660 .free_client = nfs4_free_client,
1179acc6
BS		 8661 .create_server = nfs4_create_server,
8662 .clone_server = nfs_clone_server,
1da177e4
LT		 8663};
8664
64c2ce8b
AK		 8665static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8666 .prefix = XATTR_NAME_NFSV4_ACL,
8667 .list = nfs4_xattr_list_nfs4_acl,
8668 .get = nfs4_xattr_get_nfs4_acl,
8669 .set = nfs4_xattr_set_nfs4_acl,
8670};
8671
8672const struct xattr_handler *nfs4_xattr_handlers[] = {
8673 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8674#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8675 &nfs4_xattr_nfs4_label_handler,
8676#endif
64c2ce8b
AK		 8677 NULL
8678};
8679
1da177e4
LT		 8680/*
8681 * Local variables:
8682 * c-basic-offset: 8
8683 * End:
8684 */
Linux 6.x block layer and io_uring tree(s)