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NFS: Set an attribute barrier on all updates
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4 68
c6d01c6f
TM		 69#include "nfs4trace.h"
70
1da177e4
LT		 71#define NFSDBG_FACILITY NFSDBG_PROC
72
2066fe89 73#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 74#define NFS4_POLL_RETRY_MAX (15*HZ)
75
cdd4e68b 76struct nfs4_opendata;
864472e9 77static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 78static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 79static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
8478eaa1 80static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *, long *);
81934ddb 81static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 82static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
83static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 84static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 86 struct nfs4_state *state, struct nfs4_label *ilabel,
87 struct nfs4_label *olabel);
f062eb6c 88#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 89static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
90 struct rpc_cred *);
91static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
92 struct rpc_cred *);
f062eb6c 93#endif
aa9c2669
DQ		 94
95#ifdef CONFIG_NFS_V4_SECURITY_LABEL
96static inline struct nfs4_label *
97nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
98 struct iattr *sattr, struct nfs4_label *label)
99{
100 int err;
101
102 if (label == NULL)
103 return NULL;
104
105 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
106 return NULL;
107
aa9c2669
DQ		 108 err = security_dentry_init_security(dentry, sattr->ia_mode,
109 &dentry->d_name, (void **)&label->label, &label->len);
110 if (err == 0)
111 return label;
112
113 return NULL;
114}
115static inline void
116nfs4_label_release_security(struct nfs4_label *label)
117{
118 if (label)
119 security_release_secctx(label->label, label->len);
120}
121static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
122{
123 if (label)
124 return server->attr_bitmask;
125
126 return server->attr_bitmask_nl;
127}
128#else
129static inline struct nfs4_label *
130nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
131 struct iattr *sattr, struct nfs4_label *l)
132{ return NULL; }
133static inline void
134nfs4_label_release_security(struct nfs4_label *label)
135{ return; }
136static inline u32 *
137nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
138{ return server->attr_bitmask; }
139#endif
140
1da177e4 141/* Prevent leaks of NFSv4 errors into userland */
46f72f57 142static int nfs4_map_errors(int err)
1da177e4 143{
52567b03
TM		 144 if (err >= -1000)
145 return err;
146 switch (err) {
147 case -NFS4ERR_RESOURCE:
30005121
WAA		 148 case -NFS4ERR_LAYOUTTRYLATER:
149 case -NFS4ERR_RECALLCONFLICT:
52567b03 150 return -EREMOTEIO;
7ebb9315 151 case -NFS4ERR_WRONGSEC:
8897538e 152 case -NFS4ERR_WRONG_CRED:
7ebb9315 153 return -EPERM;
3ddeb7c5
TM		 154 case -NFS4ERR_BADOWNER:
155 case -NFS4ERR_BADNAME:
156 return -EINVAL;
fb13bfa7
TM		 157 case -NFS4ERR_SHARE_DENIED:
158 return -EACCES;
f25efd85
SD		 159 case -NFS4ERR_MINOR_VERS_MISMATCH:
160 return -EPROTONOSUPPORT;
6e3cf241
TM		 161 case -NFS4ERR_FILE_OPEN:
162 return -EBUSY;
52567b03 163 default:
1da177e4 164 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 165 __func__, -err);
52567b03 166 break;
1da177e4 167 }
52567b03 168 return -EIO;
1da177e4
LT		 169}
170
171/*
172 * This is our standard bitmap for GETATTR requests.
173 */
1549210f 174const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 175 FATTR4_WORD0_TYPE
176 | FATTR4_WORD0_CHANGE
177 | FATTR4_WORD0_SIZE
178 | FATTR4_WORD0_FSID
179 | FATTR4_WORD0_FILEID,
180 FATTR4_WORD1_MODE
181 | FATTR4_WORD1_NUMLINKS
182 | FATTR4_WORD1_OWNER
183 | FATTR4_WORD1_OWNER_GROUP
184 | FATTR4_WORD1_RAWDEV
185 | FATTR4_WORD1_SPACE_USED
186 | FATTR4_WORD1_TIME_ACCESS
187 | FATTR4_WORD1_TIME_METADATA
aa9c2669
DQ		 188 | FATTR4_WORD1_TIME_MODIFY,
189#ifdef CONFIG_NFS_V4_SECURITY_LABEL
190 FATTR4_WORD2_SECURITY_LABEL
191#endif
1da177e4
LT		 192};
193
1549210f
TM		 194static const u32 nfs4_pnfs_open_bitmap[3] = {
195 FATTR4_WORD0_TYPE
196 | FATTR4_WORD0_CHANGE
197 | FATTR4_WORD0_SIZE
198 | FATTR4_WORD0_FSID
199 | FATTR4_WORD0_FILEID,
200 FATTR4_WORD1_MODE
201 | FATTR4_WORD1_NUMLINKS
202 | FATTR4_WORD1_OWNER
203 | FATTR4_WORD1_OWNER_GROUP
204 | FATTR4_WORD1_RAWDEV
205 | FATTR4_WORD1_SPACE_USED
206 | FATTR4_WORD1_TIME_ACCESS
207 | FATTR4_WORD1_TIME_METADATA
208 | FATTR4_WORD1_TIME_MODIFY,
209 FATTR4_WORD2_MDSTHRESHOLD
210};
211
e23008ec
AA		 212static const u32 nfs4_open_noattr_bitmap[3] = {
213 FATTR4_WORD0_TYPE
214 | FATTR4_WORD0_CHANGE
215 | FATTR4_WORD0_FILEID,
216};
217
a09df2ca 218const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 219 FATTR4_WORD0_FILES_AVAIL
220 | FATTR4_WORD0_FILES_FREE
221 | FATTR4_WORD0_FILES_TOTAL,
222 FATTR4_WORD1_SPACE_AVAIL
223 | FATTR4_WORD1_SPACE_FREE
224 | FATTR4_WORD1_SPACE_TOTAL
225};
226
a09df2ca 227const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 228 FATTR4_WORD0_MAXLINK
229 | FATTR4_WORD0_MAXNAME,
230 0
231};
232
dae100c2 233const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 234 | FATTR4_WORD0_MAXREAD
235 | FATTR4_WORD0_MAXWRITE
236 | FATTR4_WORD0_LEASE_TIME,
55b6e774 237 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 238 | FATTR4_WORD1_FS_LAYOUT_TYPES,
239 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 240};
241
a09df2ca 242const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 243 FATTR4_WORD0_TYPE
244 | FATTR4_WORD0_CHANGE
245 | FATTR4_WORD0_SIZE
246 | FATTR4_WORD0_FSID
247 | FATTR4_WORD0_FILEID
248 | FATTR4_WORD0_FS_LOCATIONS,
249 FATTR4_WORD1_MODE
250 | FATTR4_WORD1_NUMLINKS
251 | FATTR4_WORD1_OWNER
252 | FATTR4_WORD1_OWNER_GROUP
253 | FATTR4_WORD1_RAWDEV
254 | FATTR4_WORD1_SPACE_USED
255 | FATTR4_WORD1_TIME_ACCESS
256 | FATTR4_WORD1_TIME_METADATA
257 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 258 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 259};
260
bc4785cd 261static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 262 struct nfs4_readdir_arg *readdir)
263{
0dbb4c67 264 __be32 *start, *p;
1da177e4 265
1da177e4 266 if (cookie > 2) {
b7ef1956 267 readdir->cookie = cookie;
1da177e4
LT		 268 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
269 return;
270 }
271
272 readdir->cookie = 0;
273 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
274 if (cookie == 2)
275 return;
276
277 /*
278 * NFSv4 servers do not return entries for '.' and '..'
279 * Therefore, we fake these entries here. We let '.'
280 * have cookie 0 and '..' have cookie 1. Note that
281 * when talking to the server, we always send cookie 0
282 * instead of 1 or 2.
283 */
2b86ce2d 284 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 285
286 if (cookie == 0) {
287 *p++ = xdr_one; /* next */
288 *p++ = xdr_zero; /* cookie, first word */
289 *p++ = xdr_one; /* cookie, second word */
290 *p++ = xdr_one; /* entry len */
291 memcpy(p, ".\0\0\0", 4); /* entry */
292 p++;
293 *p++ = xdr_one; /* bitmap length */
294 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
295 *p++ = htonl(8); /* attribute buffer length */
4e769b93 296 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 297 }
298
299 *p++ = xdr_one; /* next */
300 *p++ = xdr_zero; /* cookie, first word */
301 *p++ = xdr_two; /* cookie, second word */
302 *p++ = xdr_two; /* entry len */
303 memcpy(p, "..\0\0", 4); /* entry */
304 p++;
305 *p++ = xdr_one; /* bitmap length */
306 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
307 *p++ = htonl(8); /* attribute buffer length */
4e769b93 308 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 309
310 readdir->pgbase = (char *)p - (char *)start;
311 readdir->count -= readdir->pgbase;
2b86ce2d 312 kunmap_atomic(start);
1da177e4
LT		 313}
314
8478eaa1
N		 315static long nfs4_update_delay(long *timeout)
316{
317 long ret;
318 if (!timeout)
319 return NFS4_POLL_RETRY_MAX;
320 if (*timeout <= 0)
321 *timeout = NFS4_POLL_RETRY_MIN;
322 if (*timeout > NFS4_POLL_RETRY_MAX)
323 *timeout = NFS4_POLL_RETRY_MAX;
324 ret = *timeout;
325 *timeout <<= 1;
326 return ret;
327}
328
65de872e
TM		 329static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
330{
331 int res = 0;
332
333 might_sleep();
334
8478eaa1
N		 335 freezable_schedule_timeout_killable_unsafe(
336 nfs4_update_delay(timeout));
65de872e
TM		 337 if (fatal_signal_pending(current))
338 res = -ERESTARTSYS;
65de872e
TM		 339 return res;
340}
341
342/* This is the error handling routine for processes that are allowed
343 * to sleep.
344 */
f4ac1674 345int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 346{
347 struct nfs_client *clp = server->nfs_client;
9e33bed5 348 struct nfs4_state *state = exception->state;
3114ea7a 349 struct inode *inode = exception->inode;
65de872e
TM		 350 int ret = errorcode;
351
352 exception->retry = 0;
353 switch(errorcode) {
354 case 0:
355 return 0;
3114ea7a 356 case -NFS4ERR_OPENMODE:
011e2a7f 357 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 358 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 359 exception->retry = 1;
360 return 0;
361 }
362 if (state == NULL)
363 break;
5d422301
TM		 364 ret = nfs4_schedule_stateid_recovery(server, state);
365 if (ret < 0)
366 break;
3114ea7a 367 goto wait_on_recovery;
a1d0b5ee 368 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 369 case -NFS4ERR_ADMIN_REVOKED:
370 case -NFS4ERR_BAD_STATEID:
9e33bed5
TM		 371 if (state == NULL)
372 break;
5d422301
TM		 373 ret = nfs4_schedule_stateid_recovery(server, state);
374 if (ret < 0)
375 break;
0400a6b0 376 goto wait_on_recovery;
0ced63d1 377 case -NFS4ERR_EXPIRED:
5d422301
TM		 378 if (state != NULL) {
379 ret = nfs4_schedule_stateid_recovery(server, state);
380 if (ret < 0)
381 break;
382 }
65de872e 383 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 384 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 385 nfs4_schedule_lease_recovery(clp);
386 goto wait_on_recovery;
519ae255
CL		 387 case -NFS4ERR_MOVED:
388 ret = nfs4_schedule_migration_recovery(server);
389 if (ret < 0)
390 break;
391 goto wait_on_recovery;
8ef2f8d4
CL		 392 case -NFS4ERR_LEASE_MOVED:
393 nfs4_schedule_lease_moved_recovery(clp);
394 goto wait_on_recovery;
03391693 395#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 396 case -NFS4ERR_BADSESSION:
397 case -NFS4ERR_BADSLOT:
398 case -NFS4ERR_BAD_HIGH_SLOT:
399 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
400 case -NFS4ERR_DEADSESSION:
401 case -NFS4ERR_SEQ_FALSE_RETRY:
402 case -NFS4ERR_SEQ_MISORDERED:
403 dprintk("%s ERROR: %d Reset session\n", __func__,
404 errorcode);
9f594791 405 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 406 goto wait_on_recovery;
03391693 407#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 408 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 409 if (exception->timeout > HZ) {
410 /* We have retried a decent amount, time to
411 * fail
412 */
413 ret = -EBUSY;
414 break;
415 }
65de872e
TM		 416 case -NFS4ERR_GRACE:
417 case -NFS4ERR_DELAY:
418 ret = nfs4_delay(server->client, &exception->timeout);
419 if (ret != 0)
420 break;
a8a4ae3a 421 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 422 case -NFS4ERR_OLD_STATEID:
423 exception->retry = 1;
b064eca2
TM		 424 break;
425 case -NFS4ERR_BADOWNER:
426 /* The following works around a Linux server bug! */
427 case -NFS4ERR_BADNAME:
428 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
429 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
430 exception->retry = 1;
431 printk(KERN_WARNING "NFS: v4 server %s "
432 "does not accept raw "
433 "uid/gids. "
434 "Reenabling the idmapper.\n",
435 server->nfs_client->cl_hostname);
436 }
65de872e
TM		 437 }
438 /* We failed to handle the error */
439 return nfs4_map_errors(ret);
0400a6b0 440wait_on_recovery:
a2c0b9e2 441 ret = nfs4_wait_clnt_recover(clp);
519ae255
CL		 442 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
443 return -EIO;
a2c0b9e2
TM		 444 if (ret == 0)
445 exception->retry = 1;
446 return ret;
65de872e
TM		 447}
448
a5250def
WAA		 449/*
450 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
451 * or 'false' otherwise.
452 */
453static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
454{
455 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
456
457 if (flavor == RPC_AUTH_GSS_KRB5I ||
458 flavor == RPC_AUTH_GSS_KRB5P)
459 return true;
460
461 return false;
462}
65de872e 463
452e9352 464static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 465{
1da177e4
LT		 466 spin_lock(&clp->cl_lock);
467 if (time_before(clp->cl_last_renewal,timestamp))
468 clp->cl_last_renewal = timestamp;
469 spin_unlock(&clp->cl_lock);
470}
471
452e9352
TM		 472static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
473{
474 do_renew_lease(server->nfs_client, timestamp);
475}
476
2a3eb2b9
CL		 477struct nfs4_call_sync_data {
478 const struct nfs_server *seq_server;
479 struct nfs4_sequence_args *seq_args;
480 struct nfs4_sequence_res *seq_res;
481};
482
a9c92d6b
CL		 483static void nfs4_init_sequence(struct nfs4_sequence_args *args,
484 struct nfs4_sequence_res *res, int cache_reply)
485{
486 args->sa_slot = NULL;
487 args->sa_cache_this = cache_reply;
488 args->sa_privileged = 0;
489
490 res->sr_slot = NULL;
491}
492
493static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
494{
495 args->sa_privileged = 1;
496}
497
cb04ad2a
PT		 498int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
499 struct nfs4_sequence_args *args,
500 struct nfs4_sequence_res *res,
501 struct rpc_task *task)
3bd2384a 502{
3bd2384a
CL		 503 struct nfs4_slot *slot;
504
505 /* slot already allocated? */
506 if (res->sr_slot != NULL)
507 goto out_start;
508
509 spin_lock(&tbl->slot_tbl_lock);
510 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
511 goto out_sleep;
512
513 slot = nfs4_alloc_slot(tbl);
514 if (IS_ERR(slot)) {
515 if (slot == ERR_PTR(-ENOMEM))
516 task->tk_timeout = HZ >> 2;
517 goto out_sleep;
518 }
519 spin_unlock(&tbl->slot_tbl_lock);
520
521 args->sa_slot = slot;
522 res->sr_slot = slot;
523
524out_start:
525 rpc_call_start(task);
526 return 0;
527
528out_sleep:
529 if (args->sa_privileged)
530 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
531 NULL, RPC_PRIORITY_PRIVILEGED);
532 else
533 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
534 spin_unlock(&tbl->slot_tbl_lock);
535 return -EAGAIN;
536}
cb04ad2a 537EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
3bd2384a
CL		 538
539static int nfs40_sequence_done(struct rpc_task *task,
540 struct nfs4_sequence_res *res)
541{
542 struct nfs4_slot *slot = res->sr_slot;
543 struct nfs4_slot_table *tbl;
544
cab92c19 545 if (slot == NULL)
3bd2384a
CL		 546 goto out;
547
548 tbl = slot->table;
549 spin_lock(&tbl->slot_tbl_lock);
550 if (!nfs41_wake_and_assign_slot(tbl, slot))
551 nfs4_free_slot(tbl, slot);
552 spin_unlock(&tbl->slot_tbl_lock);
553
554 res->sr_slot = NULL;
555out:
556 return 1;
557}
558
cccef3b9
AA		 559#if defined(CONFIG_NFS_V4_1)
560
d185a334 561static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 562{
e3725ec0 563 struct nfs4_session *session;
13615871 564 struct nfs4_slot_table *tbl;
a13ce7c6 565 struct nfs4_slot *slot = res->sr_slot;
c10e4498 566 bool send_new_highest_used_slotid = false;
13615871 567
a13ce7c6 568 tbl = slot->table;
e3725ec0 569 session = tbl->session;
ea028ac9 570
35dc1d74 571 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 572 /* Be nice to the server: try to ensure that the last transmitted
573 * value for highest_user_slotid <= target_highest_slotid
574 */
575 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
576 send_new_highest_used_slotid = true;
577
a13ce7c6 578 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 579 send_new_highest_used_slotid = false;
580 goto out_unlock;
581 }
a13ce7c6 582 nfs4_free_slot(tbl, slot);
c10e4498
TM		 583
584 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
585 send_new_highest_used_slotid = false;
b75ad4cd 586out_unlock:
35dc1d74 587 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 588 res->sr_slot = NULL;
c10e4498
TM		 589 if (send_new_highest_used_slotid)
590 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 591}
592
f9c96fcc 593int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 594{
e3725ec0 595 struct nfs4_session *session;
a13ce7c6 596 struct nfs4_slot *slot = res->sr_slot;
14516c3a 597 struct nfs_client *clp;
ac20d163 598 bool interrupted = false;
85563073 599 int ret = 1;
b0df806c 600
a13ce7c6
TM		 601 if (slot == NULL)
602 goto out_noaction;
468f8613
BS		 603 /* don't increment the sequence number if the task wasn't sent */
604 if (!RPC_WAS_SENT(task))
b0df806c
AA		 605 goto out;
606
e3725ec0 607 session = slot->table->session;
933602e3 608
ac20d163
TM		 609 if (slot->interrupted) {
610 slot->interrupted = 0;
611 interrupted = true;
612 }
613
2f92ae34 614 trace_nfs4_sequence_done(session, res);
691daf3b 615 /* Check the SEQUENCE operation status */
14516c3a
TM		 616 switch (res->sr_status) {
617 case 0:
b0df806c 618 /* Update the slot's sequence and clientid lease timer */
933602e3 619 ++slot->seq_nr;
e3725ec0 620 clp = session->clp;
8e63b6a8 621 do_renew_lease(clp, res->sr_timestamp);
0629e370 622 /* Check sequence flags */
b4410c2f
TM		 623 if (res->sr_status_flags != 0)
624 nfs4_schedule_lease_recovery(clp);
464ee9f9 625 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 626 break;
ac20d163
TM		 627 case 1:
628 /*
629 * sr_status remains 1 if an RPC level error occurred.
630 * The server may or may not have processed the sequence
631 * operation..
632 * Mark the slot as having hosted an interrupted RPC call.
633 */
634 slot->interrupted = 1;
635 goto out;
14516c3a
TM		 636 case -NFS4ERR_DELAY:
637 /* The server detected a resend of the RPC call and
638 * returned NFS4ERR_DELAY as per Section 2.10.6.2
639 * of RFC5661.
640 */
df2fabff 641 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 642 __func__,
df2fabff 643 slot->slot_nr,
933602e3 644 slot->seq_nr);
14516c3a 645 goto out_retry;
85563073
TM		 646 case -NFS4ERR_BADSLOT:
647 /*
648 * The slot id we used was probably retired. Try again
649 * using a different slot id.
650 */
e8794440
TM		 651 goto retry_nowait;
652 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 653 /*
654 * Was the last operation on this sequence interrupted?
655 * If so, retry after bumping the sequence number.
656 */
657 if (interrupted) {
658 ++slot->seq_nr;
659 goto retry_nowait;
660 }
e8794440
TM		 661 /*
662 * Could this slot have been previously retired?
663 * If so, then the server may be expecting seq_nr = 1!
664 */
8e63b6a8
TM		 665 if (slot->seq_nr != 1) {
666 slot->seq_nr = 1;
667 goto retry_nowait;
668 }
669 break;
e8794440
TM		 670 case -NFS4ERR_SEQ_FALSE_RETRY:
671 ++slot->seq_nr;
672 goto retry_nowait;
14516c3a
TM		 673 default:
674 /* Just update the slot sequence no. */
933602e3 675 ++slot->seq_nr;
b0df806c
AA		 676 }
677out:
678 /* The session may be reset by one of the error handlers. */
679 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 680 nfs41_sequence_free_slot(res);
a13ce7c6 681out_noaction:
85563073 682 return ret;
e8794440
TM		 683retry_nowait:
684 if (rpc_restart_call_prepare(task)) {
685 task->tk_status = 0;
686 ret = 0;
687 }
688 goto out;
14516c3a 689out_retry:
d05dd4e9 690 if (!rpc_restart_call(task))
14516c3a
TM		 691 goto out;
692 rpc_delay(task, NFS4_POLL_RETRY_MAX);
693 return 0;
b0df806c 694}
f9c96fcc 695EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 696
2c4b131d 697int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 698{
e3725ec0 699 if (res->sr_slot == NULL)
14516c3a 700 return 1;
3bd2384a
CL		 701 if (!res->sr_slot->table->session)
702 return nfs40_sequence_done(task, res);
14516c3a 703 return nfs41_sequence_done(task, res);
df896455 704}
2c4b131d 705EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 706
dc70d7b3 707int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 708 struct nfs4_sequence_args *args,
709 struct nfs4_sequence_res *res,
ce5039c1
AA		 710 struct rpc_task *task)
711{
fbcd4abc
AA		 712 struct nfs4_slot *slot;
713 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 714
715 dprintk("--> %s\n", __func__);
ce5039c1 716 /* slot already allocated? */
dfb4f309 717 if (res->sr_slot != NULL)
d9afbd1b 718 goto out_success;
ce5039c1 719
fbcd4abc
AA		 720 tbl = &session->fc_slot_table;
721
69d206b5
TM		 722 task->tk_timeout = 0;
723
fbcd4abc 724 spin_lock(&tbl->slot_tbl_lock);
774d5f14 725 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 726 !args->sa_privileged) {
0b1c8fc4 727 /* The state manager will wait until the slot table is empty */
0b1c8fc4 728 dprintk("%s session is draining\n", __func__);
7b939a3f 729 goto out_sleep;
689cf5c1
AB		 730 }
731
2dc03b7f 732 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 733 if (IS_ERR(slot)) {
734 /* If out of memory, try again in 1/4 second */
735 if (slot == ERR_PTR(-ENOMEM))
736 task->tk_timeout = HZ >> 2;
fbcd4abc 737 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 738 goto out_sleep;
fbcd4abc
AA		 739 }
740 spin_unlock(&tbl->slot_tbl_lock);
741
2b2fa717 742 args->sa_slot = slot;
fbcd4abc 743
e8d92382 744 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 745 slot->slot_nr, slot->seq_nr);
fbcd4abc 746
dfb4f309 747 res->sr_slot = slot;
8e63b6a8 748 res->sr_timestamp = jiffies;
2a6e26cd 749 res->sr_status_flags = 0;
fbcd4abc
AA		 750 /*
751 * sr_status is only set in decode_sequence, and so will remain
752 * set to 1 if an rpc level failure occurs.
753 */
754 res->sr_status = 1;
2f92ae34 755 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 756out_success:
757 rpc_call_start(task);
ce5039c1 758 return 0;
7b939a3f 759out_sleep:
8fe72bac
TM		 760 /* Privileged tasks are queued with top priority */
761 if (args->sa_privileged)
1e1093c7
TM		 762 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
763 NULL, RPC_PRIORITY_PRIVILEGED);
764 else
765 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 766 spin_unlock(&tbl->slot_tbl_lock);
767 return -EAGAIN;
ce5039c1 768}
dc70d7b3 769EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 770
5a580e0a
CL		 771static int nfs4_setup_sequence(const struct nfs_server *server,
772 struct nfs4_sequence_args *args,
773 struct nfs4_sequence_res *res,
774 struct rpc_task *task)
ce5039c1 775{
035168ab 776 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 777 int ret = 0;
778
3bd2384a 779 if (!session)
cb04ad2a
PT		 780 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
781 args, res, task);
035168ab 782
e8d92382 783 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 784 __func__, session->clp, session, res->sr_slot ?
e8d92382 785 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 786
9d12b216 787 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 788
ce5039c1
AA		 789 dprintk("<-- %s status=%d\n", __func__, ret);
790 return ret;
791}
792
ce5039c1
AA		 793static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
794{
2a3eb2b9 795 struct nfs4_call_sync_data *data = calldata;
6ba7db34 796 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 797
035168ab
TM		 798 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
799
d9afbd1b 800 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 801}
802
69ab40c4
AA		 803static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
804{
2a3eb2b9 805 struct nfs4_call_sync_data *data = calldata;
69ab40c4 806
14516c3a 807 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 808}
809
17280175 810static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 811 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 812 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 813};
814
3bd2384a
CL		 815#else /* !CONFIG_NFS_V4_1 */
816
9915ea7e
CL		 817static int nfs4_setup_sequence(const struct nfs_server *server,
818 struct nfs4_sequence_args *args,
819 struct nfs4_sequence_res *res,
820 struct rpc_task *task)
821{
cb04ad2a
PT		 822 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
823 args, res, task);
9915ea7e
CL		 824}
825
2c4b131d
PT		 826int nfs4_sequence_done(struct rpc_task *task,
827 struct nfs4_sequence_res *res)
9915ea7e 828{
3bd2384a 829 return nfs40_sequence_done(task, res);
9915ea7e 830}
2c4b131d 831EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 832
833#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 834
835static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
836{
837 struct nfs4_call_sync_data *data = calldata;
838 nfs4_setup_sequence(data->seq_server,
839 data->seq_args, data->seq_res, task);
840}
841
842static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
843{
844 struct nfs4_call_sync_data *data = calldata;
845 nfs4_sequence_done(task, data->seq_res);
846}
847
848static const struct rpc_call_ops nfs40_call_sync_ops = {
849 .rpc_call_prepare = nfs40_call_sync_prepare,
850 .rpc_call_done = nfs40_call_sync_done,
851};
852
7c513058
BS		 853static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
854 struct nfs_server *server,
ce5039c1
AA		 855 struct rpc_message *msg,
856 struct nfs4_sequence_args *args,
8fe72bac 857 struct nfs4_sequence_res *res)
ce5039c1
AA		 858{
859 int ret;
860 struct rpc_task *task;
9915ea7e 861 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 862 struct nfs4_call_sync_data data = {
035168ab 863 .seq_server = server,
ce5039c1
AA		 864 .seq_args = args,
865 .seq_res = res,
ce5039c1
AA		 866 };
867 struct rpc_task_setup task_setup = {
7c513058 868 .rpc_client = clnt,
ce5039c1 869 .rpc_message = msg,
9915ea7e 870 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 871 .callback_data = &data
872 };
873
ce5039c1
AA		 874 task = rpc_run_task(&task_setup);
875 if (IS_ERR(task))
876 ret = PTR_ERR(task);
877 else {
878 ret = task->tk_status;
879 rpc_put_task(task);
880 }
881 return ret;
882}
883
7c513058
BS		 884int nfs4_call_sync(struct rpc_clnt *clnt,
885 struct nfs_server *server,
e73b83f2
BS		 886 struct rpc_message *msg,
887 struct nfs4_sequence_args *args,
888 struct nfs4_sequence_res *res,
889 int cache_reply)
890{
a9c92d6b 891 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 892 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 893}
cccef3b9 894
38478b24 895static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 896{
38478b24 897 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 898
38478b24 899 spin_lock(&dir->i_lock);
359d7d1c 900 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 901 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 902 nfs_force_lookup_revalidate(dir);
a9a4a87a 903 dir->i_version = cinfo->after;
de242c0b 904 nfs_fscache_invalidate(dir);
38478b24 905 spin_unlock(&dir->i_lock);
1da177e4
LT		 906}
907
e56e0b78 908struct nfs4_opendata {
c6d00e63 909 struct kref kref;
e56e0b78
TM		 910 struct nfs_openargs o_arg;
911 struct nfs_openres o_res;
cdd4e68b
TM		 912 struct nfs_open_confirmargs c_arg;
913 struct nfs_open_confirmres c_res;
6926afd1
TM		 914 struct nfs4_string owner_name;
915 struct nfs4_string group_name;
e56e0b78 916 struct nfs_fattr f_attr;
1775fd3e 917 struct nfs4_label *f_label;
e56e0b78 918 struct dentry *dir;
82a2c1b7 919 struct dentry *dentry;
e56e0b78 920 struct nfs4_state_owner *owner;
aac00a8d 921 struct nfs4_state *state;
e56e0b78 922 struct iattr attrs;
26e976a8 923 unsigned long timestamp;
3e309914 924 unsigned int rpc_done : 1;
5bc2afc2 925 unsigned int file_created : 1;
bdeca1b7 926 unsigned int is_recover : 1;
24ac23ab
TM		 927 int rpc_status;
928 int cancelled;
e56e0b78
TM		 929};
930
49f9a0fa
TM		 931static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
932 int err, struct nfs4_exception *exception)
933{
934 if (err != -EINVAL)
935 return false;
936 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
937 return false;
938 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
939 exception->retry = 1;
940 return true;
941}
942
6ae37339
TM		 943static u32
944nfs4_map_atomic_open_share(struct nfs_server *server,
945 fmode_t fmode, int openflags)
946{
947 u32 res = 0;
948
949 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
950 case FMODE_READ:
951 res = NFS4_SHARE_ACCESS_READ;
952 break;
953 case FMODE_WRITE:
954 res = NFS4_SHARE_ACCESS_WRITE;
955 break;
956 case FMODE_READ|FMODE_WRITE:
957 res = NFS4_SHARE_ACCESS_BOTH;
958 }
959 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
960 goto out;
961 /* Want no delegation if we're using O_DIRECT */
962 if (openflags & O_DIRECT)
963 res |= NFS4_SHARE_WANT_NO_DELEG;
964out:
965 return res;
966}
967
49f9a0fa
TM		 968static enum open_claim_type4
969nfs4_map_atomic_open_claim(struct nfs_server *server,
970 enum open_claim_type4 claim)
971{
972 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
973 return claim;
974 switch (claim) {
975 default:
976 return claim;
977 case NFS4_OPEN_CLAIM_FH:
978 return NFS4_OPEN_CLAIM_NULL;
979 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
980 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
981 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
982 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
983 }
984}
2ced46c2
TM		 985
986static void nfs4_init_opendata_res(struct nfs4_opendata *p)
987{
988 p->o_res.f_attr = &p->f_attr;
1775fd3e 989 p->o_res.f_label = p->f_label;
c1d51931
TM		 990 p->o_res.seqid = p->o_arg.seqid;
991 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 992 p->o_res.server = p->o_arg.server;
5f657530 993 p->o_res.access_request = p->o_arg.access;
2ced46c2 994 nfs_fattr_init(&p->f_attr);
6926afd1 995 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 996}
997
82a2c1b7 998static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 999 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1000 const struct iattr *attrs,
1775fd3e 1001 struct nfs4_label *label,
4a1c0893 1002 enum open_claim_type4 claim,
8535b2be 1003 gfp_t gfp_mask)
e56e0b78 1004{
82a2c1b7 1005 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 1006 struct inode *dir = parent->d_inode;
1007 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1008 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1009 struct nfs4_opendata *p;
1010
8535b2be 1011 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1012 if (p == NULL)
1013 goto err;
14c43f76
DQ		 1014
1015 p->f_label = nfs4_label_alloc(server, gfp_mask);
1016 if (IS_ERR(p->f_label))
1017 goto err_free_p;
1018
63f5f796
TM		 1019 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1020 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1021 if (IS_ERR(p->o_arg.seqid))
14c43f76 1022 goto err_free_label;
82a2c1b7
AV		 1023 nfs_sb_active(dentry->d_sb);
1024 p->dentry = dget(dentry);
e56e0b78
TM		 1025 p->dir = parent;
1026 p->owner = sp;
1027 atomic_inc(&sp->so_count);
dc0b027d
TM		 1028 p->o_arg.open_flags = flags;
1029 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
6ae37339
TM		 1030 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1031 fmode, flags);
ae2bb032
WAA		 1032 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1033 * will return permission denied for all bits until close */
1034 if (!(flags & O_EXCL)) {
1035 /* ask server to check for all possible rights as results
1036 * are cached */
1037 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1038 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1039 }
7539bbab 1040 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1041 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1042 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1043 p->o_arg.name = &dentry->d_name;
e56e0b78 1044 p->o_arg.server = server;
aa9c2669 1045 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1046 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1047 p->o_arg.label = label;
49f9a0fa
TM		 1048 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1049 switch (p->o_arg.claim) {
4a1c0893
TM		 1050 case NFS4_OPEN_CLAIM_NULL:
1051 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1052 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1053 p->o_arg.fh = NFS_FH(dir);
1054 break;
1055 case NFS4_OPEN_CLAIM_PREVIOUS:
1056 case NFS4_OPEN_CLAIM_FH:
1057 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1058 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1059 p->o_arg.fh = NFS_FH(dentry->d_inode);
1060 }
536e43d1 1061 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1062 __u32 verf[2];
d77d76ff 1063
e56e0b78
TM		 1064 p->o_arg.u.attrs = &p->attrs;
1065 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1066
1067 verf[0] = jiffies;
1068 verf[1] = current->pid;
1069 memcpy(p->o_arg.u.verifier.data, verf,
1070 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1071 }
cdd4e68b
TM		 1072 p->c_arg.fh = &p->o_res.fh;
1073 p->c_arg.stateid = &p->o_res.stateid;
1074 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1075 nfs4_init_opendata_res(p);
c6d00e63 1076 kref_init(&p->kref);
e56e0b78 1077 return p;
14c43f76
DQ		 1078
1079err_free_label:
1080 nfs4_label_free(p->f_label);
1081err_free_p:
e56e0b78
TM		 1082 kfree(p);
1083err:
1084 dput(parent);
1085 return NULL;
1086}
1087
c6d00e63 1088static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1089{
c6d00e63
TM		 1090 struct nfs4_opendata *p = container_of(kref,
1091 struct nfs4_opendata, kref);
82a2c1b7 1092 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1093
1094 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1095 if (p->state != NULL)
1096 nfs4_put_open_state(p->state);
c6d00e63 1097 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1098
1099 nfs4_label_free(p->f_label);
1100
c6d00e63 1101 dput(p->dir);
82a2c1b7
AV		 1102 dput(p->dentry);
1103 nfs_sb_deactive(sb);
6926afd1 1104 nfs_fattr_free_names(&p->f_attr);
e911b815 1105 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1106 kfree(p);
1107}
1108
1109static void nfs4_opendata_put(struct nfs4_opendata *p)
1110{
1111 if (p != NULL)
1112 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1113}
1114
06f814a3
TM		 1115static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1116{
06f814a3
TM		 1117 int ret;
1118
06f814a3 1119 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1120 return ret;
1121}
1122
dc0b027d 1123static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1124{
1125 int ret = 0;
dc0b027d 1126
536e43d1 1127 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1128 goto out;
1129 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1130 case FMODE_READ:
88069f77
TM		 1131 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1132 && state->n_rdonly != 0;
6ee41268
TM		 1133 break;
1134 case FMODE_WRITE:
88069f77
TM		 1135 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1136 && state->n_wronly != 0;
6ee41268
TM		 1137 break;
1138 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1139 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1140 && state->n_rdwr != 0;
6ee41268 1141 }
dc0b027d 1142out:
6ee41268
TM		 1143 return ret;
1144}
1145
dc0b027d 1146static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1147{
652f89f6
TM		 1148 if (delegation == NULL)
1149 return 0;
dc0b027d 1150 if ((delegation->type & fmode) != fmode)
aac00a8d 1151 return 0;
d25be546
TM		 1152 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1153 return 0;
b7391f44 1154 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1155 return 1;
1156}
1157
dc0b027d 1158static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1159{
dc0b027d 1160 switch (fmode) {
e7616923
TM		 1161 case FMODE_WRITE:
1162 state->n_wronly++;
1163 break;
1164 case FMODE_READ:
1165 state->n_rdonly++;
1166 break;
1167 case FMODE_READ|FMODE_WRITE:
1168 state->n_rdwr++;
1169 }
dc0b027d 1170 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1171}
1172
4f14c194
TM		 1173static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1174{
1175 struct nfs_client *clp = state->owner->so_server->nfs_client;
1176 bool need_recover = false;
1177
1178 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1179 need_recover = true;
1180 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1181 need_recover = true;
1182 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1183 need_recover = true;
1184 if (need_recover)
1185 nfs4_state_mark_reclaim_nograce(clp, state);
1186}
1187
e999e80e
TM		 1188static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1189 nfs4_stateid *stateid)
1190{
1191 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1192 return true;
4f14c194
TM		 1193 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1194 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1195 return true;
4f14c194 1196 }
e999e80e
TM		 1197 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1198 return true;
1199 return false;
1200}
1201
f95549cf
TM		 1202static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1203{
1204 if (state->n_wronly)
1205 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1206 if (state->n_rdonly)
1207 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1208 if (state->n_rdwr)
1209 set_bit(NFS_O_RDWR_STATE, &state->flags);
1210}
1211
226056c5
TM		 1212static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1213 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1214{
226056c5
TM		 1215 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1216 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1217 case FMODE_WRITE:
1218 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1219 break;
1220 case FMODE_READ:
1221 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1222 break;
1223 case 0:
1224 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1225 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1226 clear_bit(NFS_OPEN_STATE, &state->flags);
1227 }
1228 if (stateid == NULL)
1229 return;
f95549cf
TM		 1230 /* Handle races with OPEN */
1231 if (!nfs4_stateid_match_other(stateid, &state->open_stateid) ||
1232 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1233 nfs_resync_open_stateid_locked(state);
226056c5 1234 return;
f95549cf 1235 }
003707c7 1236 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1237 nfs4_stateid_copy(&state->stateid, stateid);
1238 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1239}
1240
1241static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1242{
1243 write_seqlock(&state->seqlock);
1244 nfs_clear_open_stateid_locked(state, stateid, fmode);
1245 write_sequnlock(&state->seqlock);
4f14c194
TM		 1246 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1247 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1248}
1249
dc0b027d 1250static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1251{
dc0b027d 1252 switch (fmode) {
003707c7
TM		 1253 case FMODE_READ:
1254 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1255 break;
1256 case FMODE_WRITE:
1257 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1258 break;
1259 case FMODE_READ|FMODE_WRITE:
1260 set_bit(NFS_O_RDWR_STATE, &state->flags);
1261 }
e999e80e
TM		 1262 if (!nfs_need_update_open_stateid(state, stateid))
1263 return;
1264 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1265 nfs4_stateid_copy(&state->stateid, stateid);
1266 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1267}
1268
dc0b027d 1269static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1270{
8bda4e4c
TM		 1271 /*
1272 * Protect the call to nfs4_state_set_mode_locked and
1273 * serialise the stateid update
1274 */
1275 write_seqlock(&state->seqlock);
003707c7 1276 if (deleg_stateid != NULL) {
f597c537 1277 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1278 set_bit(NFS_DELEGATED_STATE, &state->flags);
1279 }
1280 if (open_stateid != NULL)
dc0b027d 1281 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1282 write_sequnlock(&state->seqlock);
1283 spin_lock(&state->owner->so_lock);
dc0b027d 1284 update_open_stateflags(state, fmode);
ec073428 1285 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1286}
1287
dc0b027d 1288static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1289{
1290 struct nfs_inode *nfsi = NFS_I(state->inode);
1291 struct nfs_delegation *deleg_cur;
1292 int ret = 0;
1293
dc0b027d 1294 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1295
1296 rcu_read_lock();
1297 deleg_cur = rcu_dereference(nfsi->delegation);
1298 if (deleg_cur == NULL)
1299 goto no_delegation;
1300
1301 spin_lock(&deleg_cur->lock);
17f26b12 1302 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1303 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1304 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1305 goto no_delegation_unlock;
1306
1307 if (delegation == NULL)
1308 delegation = &deleg_cur->stateid;
f597c537 1309 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1310 goto no_delegation_unlock;
1311
b7391f44 1312 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1313 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1314 ret = 1;
1315no_delegation_unlock:
1316 spin_unlock(&deleg_cur->lock);
1317no_delegation:
1318 rcu_read_unlock();
1319
1320 if (!ret && open_stateid != NULL) {
dc0b027d 1321 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1322 ret = 1;
1323 }
4f14c194
TM		 1324 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1325 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1326
1327 return ret;
1328}
1329
39071e6f
TM		 1330static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1331 const nfs4_stateid *stateid)
1332{
1333 struct nfs4_state *state = lsp->ls_state;
1334 bool ret = false;
1335
1336 spin_lock(&state->state_lock);
1337 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1338 goto out_noupdate;
1339 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1340 goto out_noupdate;
1341 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1342 ret = true;
1343out_noupdate:
1344 spin_unlock(&state->state_lock);
1345 return ret;
1346}
34310430 1347
dc0b027d 1348static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1349{
1350 struct nfs_delegation *delegation;
1351
1352 rcu_read_lock();
1353 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1354 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1355 rcu_read_unlock();
1356 return;
1357 }
1358 rcu_read_unlock();
57ec14c5 1359 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1360}
1361
6ee41268 1362static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1363{
1364 struct nfs4_state *state = opendata->state;
1365 struct nfs_inode *nfsi = NFS_I(state->inode);
1366 struct nfs_delegation *delegation;
f448badd 1367 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1368 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1369 nfs4_stateid stateid;
1370 int ret = -EAGAIN;
1371
aac00a8d 1372 for (;;) {
61beef75 1373 spin_lock(&state->owner->so_lock);
dc0b027d 1374 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1375 update_open_stateflags(state, fmode);
6ee41268 1376 spin_unlock(&state->owner->so_lock);
61beef75 1377 goto out_return_state;
6ee41268 1378 }
61beef75 1379 spin_unlock(&state->owner->so_lock);
34310430
TM		 1380 rcu_read_lock();
1381 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1382 if (!can_open_delegated(delegation, fmode)) {
34310430 1383 rcu_read_unlock();
aac00a8d 1384 break;
34310430 1385 }
aac00a8d 1386 /* Save the delegation */
f597c537 1387 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1388 rcu_read_unlock();
fa332941 1389 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1390 if (!opendata->is_recover) {
1391 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1392 if (ret != 0)
1393 goto out;
1394 }
aac00a8d 1395 ret = -EAGAIN;
34310430
TM		 1396
1397 /* Try to update the stateid using the delegation */
dc0b027d 1398 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1399 goto out_return_state;
aac00a8d 1400 }
aac00a8d
TM		 1401out:
1402 return ERR_PTR(ret);
1403out_return_state:
1404 atomic_inc(&state->count);
1405 return state;
1406}
1407
e23008ec
AA		 1408static void
1409nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1410{
1411 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1412 struct nfs_delegation *delegation;
1413 int delegation_flags = 0;
1414
1415 rcu_read_lock();
1416 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1417 if (delegation)
1418 delegation_flags = delegation->flags;
1419 rcu_read_unlock();
1420 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1421 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1422 "returning a delegation for "
1423 "OPEN(CLAIM_DELEGATE_CUR)\n",
1424 clp->cl_hostname);
1425 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1426 nfs_inode_set_delegation(state->inode,
1427 data->owner->so_cred,
1428 &data->o_res);
1429 else
1430 nfs_inode_reclaim_delegation(state->inode,
1431 data->owner->so_cred,
1432 &data->o_res);
1433}
1434
1435/*
1436 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1437 * and update the nfs4_state.
1438 */
1439static struct nfs4_state *
1440_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1441{
1442 struct inode *inode = data->state->inode;
1443 struct nfs4_state *state = data->state;
1444 int ret;
1445
d2bfda2e
WAA		 1446 if (!data->rpc_done) {
1447 if (data->rpc_status) {
1448 ret = data->rpc_status;
1449 goto err;
1450 }
1451 /* cached opens have already been processed */
1452 goto update;
e23008ec
AA		 1453 }
1454
e23008ec
AA		 1455 ret = nfs_refresh_inode(inode, &data->f_attr);
1456 if (ret)
1457 goto err;
1458
1459 if (data->o_res.delegation_type != 0)
1460 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1461update:
e23008ec
AA		 1462 update_open_stateid(state, &data->o_res.stateid, NULL,
1463 data->o_arg.fmode);
d49f042a 1464 atomic_inc(&state->count);
e23008ec
AA		 1465
1466 return state;
1467err:
1468 return ERR_PTR(ret);
1469
1470}
1471
1472static struct nfs4_state *
1473_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1474{
1475 struct inode *inode;
1476 struct nfs4_state *state = NULL;
1b370bc2 1477 int ret;
24ac23ab 1478
aac00a8d 1479 if (!data->rpc_done) {
6ee41268 1480 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1481 goto out;
1482 }
1483
1b370bc2 1484 ret = -EAGAIN;
24ac23ab 1485 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1486 goto err;
1775fd3e 1487 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1488 ret = PTR_ERR(inode);
03f28e3a 1489 if (IS_ERR(inode))
1b370bc2
TM		 1490 goto err;
1491 ret = -ENOMEM;
24ac23ab
TM		 1492 state = nfs4_get_open_state(inode, data->owner);
1493 if (state == NULL)
1b370bc2 1494 goto err_put_inode;
e23008ec
AA		 1495 if (data->o_res.delegation_type != 0)
1496 nfs4_opendata_check_deleg(data, state);
34310430 1497 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1498 data->o_arg.fmode);
24ac23ab 1499 iput(inode);
aac00a8d 1500out:
7aa262b5 1501 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1502 return state;
1b370bc2
TM		 1503err_put_inode:
1504 iput(inode);
1505err:
1506 return ERR_PTR(ret);
24ac23ab
TM		 1507}
1508
e23008ec
AA		 1509static struct nfs4_state *
1510nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1511{
1512 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1513 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1514 return _nfs4_opendata_to_nfs4_state(data);
1515}
1516
864472e9
TM		 1517static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1518{
1519 struct nfs_inode *nfsi = NFS_I(state->inode);
1520 struct nfs_open_context *ctx;
1521
1522 spin_lock(&state->inode->i_lock);
1523 list_for_each_entry(ctx, &nfsi->open_files, list) {
1524 if (ctx->state != state)
1525 continue;
1526 get_nfs_open_context(ctx);
1527 spin_unlock(&state->inode->i_lock);
1528 return ctx;
1529 }
1530 spin_unlock(&state->inode->i_lock);
1531 return ERR_PTR(-ENOENT);
1532}
1533
4a1c0893
TM		 1534static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1535 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1536{
1537 struct nfs4_opendata *opendata;
1538
4a1c0893 1539 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1540 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1541 if (opendata == NULL)
1542 return ERR_PTR(-ENOMEM);
1543 opendata->state = state;
1544 atomic_inc(&state->count);
1545 return opendata;
1546}
1547
dc0b027d 1548static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1549{
2ced46c2 1550 struct nfs4_state *newstate;
864472e9
TM		 1551 int ret;
1552
dc0b027d
TM		 1553 opendata->o_arg.open_flags = 0;
1554 opendata->o_arg.fmode = fmode;
be36e185
TM		 1555 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1556 NFS_SB(opendata->dentry->d_sb),
1557 fmode, 0);
2ced46c2
TM		 1558 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1559 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1560 nfs4_init_opendata_res(opendata);
b257957e 1561 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1562 if (ret != 0)
1563 return ret;
2ced46c2 1564 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1565 if (IS_ERR(newstate))
1566 return PTR_ERR(newstate);
643168c2 1567 nfs4_close_state(newstate, fmode);
2ced46c2 1568 *res = newstate;
864472e9
TM		 1569 return 0;
1570}
1571
1572static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1573{
864472e9 1574 struct nfs4_state *newstate;
864472e9
TM		 1575 int ret;
1576
4f14c194
TM		 1577 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1578 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1579 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1580 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1581 /* memory barrier prior to reading state->n_* */
2ced46c2 1582 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1583 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1584 smp_rmb();
1585 if (state->n_rdwr != 0) {
2ced46c2 1586 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1587 if (ret != 0)
1588 return ret;
2ced46c2
TM		 1589 if (newstate != state)
1590 return -ESTALE;
864472e9
TM		 1591 }
1592 if (state->n_wronly != 0) {
2ced46c2 1593 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1594 if (ret != 0)
1595 return ret;
2ced46c2
TM		 1596 if (newstate != state)
1597 return -ESTALE;
864472e9
TM		 1598 }
1599 if (state->n_rdonly != 0) {
2ced46c2 1600 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1601 if (ret != 0)
1602 return ret;
2ced46c2
TM		 1603 if (newstate != state)
1604 return -ESTALE;
864472e9 1605 }
1ac7e2fd
TM		 1606 /*
1607 * We may have performed cached opens for all three recoveries.
1608 * Check if we need to update the current stateid.
1609 */
1610 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1611 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1612 write_seqlock(&state->seqlock);
1ac7e2fd 1613 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1614 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1615 write_sequnlock(&state->seqlock);
1ac7e2fd 1616 }
864472e9
TM		 1617 return 0;
1618}
1619
1da177e4
LT		 1620/*
1621 * OPEN_RECLAIM:
1622 * reclaim state on the server after a reboot.
1da177e4 1623 */
539cd03a 1624static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1625{
1ac7e2fd 1626 struct nfs_delegation *delegation;
864472e9 1627 struct nfs4_opendata *opendata;
dc0b027d 1628 fmode_t delegation_type = 0;
1da177e4
LT		 1629 int status;
1630
4a1c0893
TM		 1631 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1632 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1633 if (IS_ERR(opendata))
1634 return PTR_ERR(opendata);
1ac7e2fd
TM		 1635 rcu_read_lock();
1636 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1637 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1638 delegation_type = delegation->type;
1ac7e2fd 1639 rcu_read_unlock();
864472e9
TM		 1640 opendata->o_arg.u.delegation_type = delegation_type;
1641 status = nfs4_open_recover(opendata, state);
c6d00e63 1642 nfs4_opendata_put(opendata);
1da177e4
LT		 1643 return status;
1644}
1645
539cd03a 1646static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1647{
1648 struct nfs_server *server = NFS_SERVER(state->inode);
1649 struct nfs4_exception exception = { };
1650 int err;
1651 do {
539cd03a 1652 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1653 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1654 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1655 continue;
168667c4 1656 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1657 break;
1658 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1659 } while (exception.retry);
1660 return err;
1661}
1662
864472e9
TM		 1663static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1664{
1665 struct nfs_open_context *ctx;
1666 int ret;
1667
1668 ctx = nfs4_state_find_open_context(state);
1669 if (IS_ERR(ctx))
91876b13 1670 return -EAGAIN;
539cd03a 1671 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1672 put_nfs_open_context(ctx);
1673 return ret;
1674}
1675
db4f2e63 1676static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1677{
be76b5b6
TM		 1678 switch (err) {
1679 default:
1680 printk(KERN_ERR "NFS: %s: unhandled error "
1681 "%d.\n", __func__, err);
1682 case 0:
1683 case -ENOENT:
1684 case -ESTALE:
1685 break;
1686 case -NFS4ERR_BADSESSION:
1687 case -NFS4ERR_BADSLOT:
1688 case -NFS4ERR_BAD_HIGH_SLOT:
1689 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1690 case -NFS4ERR_DEADSESSION:
1691 set_bit(NFS_DELEGATED_STATE, &state->flags);
1692 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1693 return -EAGAIN;
1694 case -NFS4ERR_STALE_CLIENTID:
1695 case -NFS4ERR_STALE_STATEID:
1696 set_bit(NFS_DELEGATED_STATE, &state->flags);
1697 case -NFS4ERR_EXPIRED:
1698 /* Don't recall a delegation if it was lost */
1699 nfs4_schedule_lease_recovery(server->nfs_client);
1700 return -EAGAIN;
352297b9
CL		 1701 case -NFS4ERR_MOVED:
1702 nfs4_schedule_migration_recovery(server);
1703 return -EAGAIN;
8ef2f8d4
CL		 1704 case -NFS4ERR_LEASE_MOVED:
1705 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1706 return -EAGAIN;
be76b5b6
TM		 1707 case -NFS4ERR_DELEG_REVOKED:
1708 case -NFS4ERR_ADMIN_REVOKED:
1709 case -NFS4ERR_BAD_STATEID:
db4f2e63 1710 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1711 nfs_inode_find_state_and_recover(state->inode,
1712 stateid);
1713 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1714 return -EAGAIN;
be76b5b6
TM		 1715 case -NFS4ERR_DELAY:
1716 case -NFS4ERR_GRACE:
1717 set_bit(NFS_DELEGATED_STATE, &state->flags);
1718 ssleep(1);
1719 return -EAGAIN;
db4f2e63
TM		 1720 case -ENOMEM:
1721 case -NFS4ERR_DENIED:
1722 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1723 return 0;
be76b5b6 1724 }
1da177e4
LT		 1725 return err;
1726}
1727
db4f2e63
TM		 1728int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1729{
1730 struct nfs_server *server = NFS_SERVER(state->inode);
1731 struct nfs4_opendata *opendata;
1732 int err;
1733
1734 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1735 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1736 if (IS_ERR(opendata))
1737 return PTR_ERR(opendata);
1738 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1739 err = nfs4_open_recover(opendata, state);
1740 nfs4_opendata_put(opendata);
1741 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1742}
1743
be05c860
CL		 1744static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1745{
1746 struct nfs4_opendata *data = calldata;
1747
cb04ad2a
PT		 1748 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1749 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1750}
1751
cdd4e68b
TM		 1752static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1753{
1754 struct nfs4_opendata *data = calldata;
1755
17ead6c8 1756 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1757
cdd4e68b 1758 data->rpc_status = task->tk_status;
26e976a8 1759 if (data->rpc_status == 0) {
f597c537 1760 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1761 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1762 renew_lease(data->o_res.server, data->timestamp);
3e309914 1763 data->rpc_done = 1;
26e976a8 1764 }
cdd4e68b
TM		 1765}
1766
1767static void nfs4_open_confirm_release(void *calldata)
1768{
1769 struct nfs4_opendata *data = calldata;
1770 struct nfs4_state *state = NULL;
1771
1772 /* If this request hasn't been cancelled, do nothing */
1773 if (data->cancelled == 0)
1774 goto out_free;
1775 /* In case of error, no cleanup! */
3e309914 1776 if (!data->rpc_done)
cdd4e68b 1777 goto out_free;
cdd4e68b 1778 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1779 if (!IS_ERR(state))
643168c2 1780 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1781out_free:
c6d00e63 1782 nfs4_opendata_put(data);
cdd4e68b
TM		 1783}
1784
1785static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1786 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1787 .rpc_call_done = nfs4_open_confirm_done,
1788 .rpc_release = nfs4_open_confirm_release,
1789};
1790
1791/*
1792 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1793 */
1794static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1795{
1796 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1797 struct rpc_task *task;
5138fde0
TM		 1798 struct rpc_message msg = {
1799 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1800 .rpc_argp = &data->c_arg,
1801 .rpc_resp = &data->c_res,
1802 .rpc_cred = data->owner->so_cred,
1803 };
c970aa85
TM		 1804 struct rpc_task_setup task_setup_data = {
1805 .rpc_client = server->client,
5138fde0 1806 .rpc_message = &msg,
c970aa85
TM		 1807 .callback_ops = &nfs4_open_confirm_ops,
1808 .callback_data = data,
101070ca 1809 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1810 .flags = RPC_TASK_ASYNC,
1811 };
1da177e4
LT		 1812 int status;
1813
17ead6c8 1814 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1815 kref_get(&data->kref);
3e309914
TM		 1816 data->rpc_done = 0;
1817 data->rpc_status = 0;
5138fde0 1818 data->timestamp = jiffies;
c970aa85 1819 task = rpc_run_task(&task_setup_data);
7a1218a2 1820 if (IS_ERR(task))
cdd4e68b 1821 return PTR_ERR(task);
cdd4e68b
TM		 1822 status = nfs4_wait_for_completion_rpc_task(task);
1823 if (status != 0) {
1824 data->cancelled = 1;
1825 smp_wmb();
1826 } else
1827 status = data->rpc_status;
e6b3c4db 1828 rpc_put_task(task);
1da177e4
LT		 1829 return status;
1830}
1831
24ac23ab 1832static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1833{
24ac23ab
TM		 1834 struct nfs4_opendata *data = calldata;
1835 struct nfs4_state_owner *sp = data->owner;
549b19cc 1836 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1837
24ac23ab 1838 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1839 goto out_wait;
aac00a8d
TM		 1840 /*
1841 * Check if we still need to send an OPEN call, or if we can use
1842 * a delegation instead.
1843 */
1844 if (data->state != NULL) {
1845 struct nfs_delegation *delegation;
1846
dc0b027d 1847 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1848 goto out_no_action;
aac00a8d
TM		 1849 rcu_read_lock();
1850 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1851 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1852 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1853 can_open_delegated(delegation, data->o_arg.fmode))
1854 goto unlock_no_action;
aac00a8d
TM		 1855 rcu_read_unlock();
1856 }
95b72eb0 1857 /* Update client id. */
549b19cc 1858 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1859 switch (data->o_arg.claim) {
1860 case NFS4_OPEN_CLAIM_PREVIOUS:
1861 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1862 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1863 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1864 case NFS4_OPEN_CLAIM_FH:
1865 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1866 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1867 }
26e976a8 1868 data->timestamp = jiffies;
035168ab 1869 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1870 &data->o_arg.seq_args,
2240a9e2
TM		 1871 &data->o_res.seq_res,
1872 task) != 0)
1873 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1874
1875 /* Set the create mode (note dependency on the session type) */
1876 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1877 if (data->o_arg.open_flags & O_EXCL) {
1878 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1879 if (nfs4_has_persistent_session(clp))
1880 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1881 else if (clp->cl_mvops->minor_version > 0)
1882 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1883 }
6ee41268 1884 return;
652f89f6
TM		 1885unlock_no_action:
1886 rcu_read_unlock();
6ee41268
TM		 1887out_no_action:
1888 task->tk_action = NULL;
c8da19b9 1889out_wait:
b75ad4cd 1890 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1891}
1892
24ac23ab
TM		 1893static void nfs4_open_done(struct rpc_task *task, void *calldata)
1894{
1895 struct nfs4_opendata *data = calldata;
1da177e4 1896
24ac23ab 1897 data->rpc_status = task->tk_status;
d898528c 1898
14516c3a
TM		 1899 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1900 return;
d898528c 1901
24ac23ab 1902 if (task->tk_status == 0) {
807d66d8
TM		 1903 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1904 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1905 case S_IFREG:
1906 break;
1907 case S_IFLNK:
24ac23ab 1908 data->rpc_status = -ELOOP;
6f926b5b
TM		 1909 break;
1910 case S_IFDIR:
24ac23ab 1911 data->rpc_status = -EISDIR;
6f926b5b
TM		 1912 break;
1913 default:
24ac23ab 1914 data->rpc_status = -ENOTDIR;
807d66d8 1915 }
6f926b5b 1916 }
26e976a8 1917 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1918 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1919 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1920 }
3e309914 1921 data->rpc_done = 1;
24ac23ab 1922}
6f926b5b 1923
24ac23ab
TM		 1924static void nfs4_open_release(void *calldata)
1925{
1926 struct nfs4_opendata *data = calldata;
1927 struct nfs4_state *state = NULL;
1928
1929 /* If this request hasn't been cancelled, do nothing */
1930 if (data->cancelled == 0)
1931 goto out_free;
1932 /* In case of error, no cleanup! */
3e309914 1933 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1934 goto out_free;
1935 /* In case we need an open_confirm, no cleanup! */
1936 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1937 goto out_free;
24ac23ab 1938 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1939 if (!IS_ERR(state))
643168c2 1940 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1941out_free:
c6d00e63 1942 nfs4_opendata_put(data);
24ac23ab
TM		 1943}
1944
1945static const struct rpc_call_ops nfs4_open_ops = {
1946 .rpc_call_prepare = nfs4_open_prepare,
1947 .rpc_call_done = nfs4_open_done,
1948 .rpc_release = nfs4_open_release,
1949};
1950
b257957e 1951static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1952{
1953 struct inode *dir = data->dir->d_inode;
1954 struct nfs_server *server = NFS_SERVER(dir);
1955 struct nfs_openargs *o_arg = &data->o_arg;
1956 struct nfs_openres *o_res = &data->o_res;
1957 struct rpc_task *task;
5138fde0
TM		 1958 struct rpc_message msg = {
1959 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1960 .rpc_argp = o_arg,
1961 .rpc_resp = o_res,
1962 .rpc_cred = data->owner->so_cred,
1963 };
c970aa85
TM		 1964 struct rpc_task_setup task_setup_data = {
1965 .rpc_client = server->client,
5138fde0 1966 .rpc_message = &msg,
c970aa85
TM		 1967 .callback_ops = &nfs4_open_ops,
1968 .callback_data = data,
101070ca 1969 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1970 .flags = RPC_TASK_ASYNC,
1971 };
24ac23ab
TM		 1972 int status;
1973
a9c92d6b 1974 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1975 kref_get(&data->kref);
3e309914
TM		 1976 data->rpc_done = 0;
1977 data->rpc_status = 0;
2ced46c2 1978 data->cancelled = 0;
bdeca1b7
TM		 1979 data->is_recover = 0;
1980 if (isrecover) {
8fe72bac 1981 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1982 data->is_recover = 1;
1983 }
c970aa85 1984 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1985 if (IS_ERR(task))
1986 return PTR_ERR(task);
1987 status = nfs4_wait_for_completion_rpc_task(task);
1988 if (status != 0) {
1989 data->cancelled = 1;
1990 smp_wmb();
1991 } else
1992 status = data->rpc_status;
1993 rpc_put_task(task);
1994
1995 return status;
1996}
1997
1998static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1999{
2000 struct inode *dir = data->dir->d_inode;
2001 struct nfs_openres *o_res = &data->o_res;
2002 int status;
2003
2004 status = nfs4_run_open_task(data, 1);
2005 if (status != 0 || !data->rpc_done)
2006 return status;
2007
6926afd1
TM		 2008 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2009
b257957e
AB		 2010 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2011 status = _nfs4_proc_open_confirm(data);
2012 if (status != 0)
2013 return status;
2014 }
2015
2016 return status;
2017}
2018
f3792d63
TM		 2019/*
2020 * Additional permission checks in order to distinguish between an
2021 * open for read, and an open for execute. This works around the
2022 * fact that NFSv4 OPEN treats read and execute permissions as being
2023 * the same.
2024 * Note that in the non-execute case, we want to turn off permission
2025 * checking if we just created a new file (POSIX open() semantics).
2026 */
6168f62c
WAA		 2027static int nfs4_opendata_access(struct rpc_cred *cred,
2028 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2029 struct nfs4_state *state, fmode_t fmode,
2030 int openflags)
6168f62c
WAA		 2031{
2032 struct nfs_access_entry cache;
2033 u32 mask;
2034
2035 /* access call failed or for some reason the server doesn't
2036 * support any access modes -- defer access call until later */
2037 if (opendata->o_res.access_supported == 0)
2038 return 0;
2039
2040 mask = 0;
f3792d63
TM		 2041 /*
2042 * Use openflags to check for exec, because fmode won't
2043 * always have FMODE_EXEC set when file open for exec.
2044 */
f8d9a897
WAA		 2045 if (openflags & __FMODE_EXEC) {
2046 /* ONLY check for exec rights */
2047 mask = MAY_EXEC;
f3792d63 2048 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2049 mask = MAY_READ;
6168f62c
WAA		 2050
2051 cache.cred = cred;
2052 cache.jiffies = jiffies;
2053 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2054 nfs_access_add_cache(state->inode, &cache);
2055
bbd3a8ee 2056 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2057 return 0;
2058
2059 /* even though OPEN succeeded, access is denied. Close the file */
2060 nfs4_close_state(state, fmode);
998f40b5 2061 return -EACCES;
6168f62c
WAA		 2062}
2063
b257957e
AB		 2064/*
2065 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2066 */
2067static int _nfs4_proc_open(struct nfs4_opendata *data)
2068{
2069 struct inode *dir = data->dir->d_inode;
2070 struct nfs_server *server = NFS_SERVER(dir);
2071 struct nfs_openargs *o_arg = &data->o_arg;
2072 struct nfs_openres *o_res = &data->o_res;
2073 int status;
2074
2075 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2076 if (!data->rpc_done)
2077 return status;
2078 if (status != 0) {
2079 if (status == -NFS4ERR_BADNAME &&
2080 !(o_arg->open_flags & O_CREAT))
2081 return -ENOENT;
24ac23ab 2082 return status;
08ef7bd3 2083 }
24ac23ab 2084
6926afd1
TM		 2085 nfs_fattr_map_and_free_names(server, &data->f_attr);
2086
5bc2afc2 2087 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2088 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2089 if (o_arg->open_flags & O_EXCL)
2090 data->file_created = 1;
2091 else if (o_res->cinfo.before != o_res->cinfo.after)
2092 data->file_created = 1;
2093 }
0df5dd4a
TM		 2094 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2095 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2096 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2097 status = _nfs4_proc_open_confirm(data);
1da177e4 2098 if (status != 0)
24ac23ab 2099 return status;
1da177e4
LT		 2100 }
2101 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2102 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2103 return 0;
1da177e4
LT		 2104}
2105
d83217c1
AA		 2106static int nfs4_recover_expired_lease(struct nfs_server *server)
2107{
2108 return nfs4_client_recover_expired_lease(server->nfs_client);
2109}
2110
1da177e4
LT		 2111/*
2112 * OPEN_EXPIRED:
2113 * reclaim state on the server after a network partition.
2114 * Assumes caller holds the appropriate lock
2115 */
539cd03a 2116static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2117{
e56e0b78 2118 struct nfs4_opendata *opendata;
864472e9 2119 int ret;
1da177e4 2120
4a1c0893 2121 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2122 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2123 if (IS_ERR(opendata))
2124 return PTR_ERR(opendata);
864472e9 2125 ret = nfs4_open_recover(opendata, state);
35d05778 2126 if (ret == -ESTALE)
3d4ff43d 2127 d_drop(ctx->dentry);
c6d00e63 2128 nfs4_opendata_put(opendata);
864472e9 2129 return ret;
1da177e4
LT		 2130}
2131
a9ed2e25 2132static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2133{
539cd03a 2134 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2135 struct nfs4_exception exception = { };
2136 int err;
2137
2138 do {
539cd03a 2139 err = _nfs4_open_expired(ctx, state);
42113a75 2140 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2141 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2142 continue;
a9ed2e25
TM		 2143 switch (err) {
2144 default:
2145 goto out;
2146 case -NFS4ERR_GRACE:
2147 case -NFS4ERR_DELAY:
2148 nfs4_handle_exception(server, err, &exception);
2149 err = 0;
2150 }
202b50dc 2151 } while (exception.retry);
a9ed2e25 2152out:
202b50dc
TM		 2153 return err;
2154}
2155
1da177e4
LT		 2156static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2157{
1da177e4 2158 struct nfs_open_context *ctx;
864472e9 2159 int ret;
1da177e4 2160
864472e9
TM		 2161 ctx = nfs4_state_find_open_context(state);
2162 if (IS_ERR(ctx))
91876b13 2163 return -EAGAIN;
539cd03a 2164 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2165 put_nfs_open_context(ctx);
2166 return ret;
1da177e4
LT		 2167}
2168
4dfd4f7a
TM		 2169static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2170{
2171 nfs_remove_bad_delegation(state->inode);
2172 write_seqlock(&state->seqlock);
2173 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2174 write_sequnlock(&state->seqlock);
2175 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2176}
2177
2178static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2179{
2180 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2181 nfs_finish_clear_delegation_stateid(state);
2182}
2183
2184static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2185{
2186 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2187 nfs40_clear_delegation_stateid(state);
2188 return nfs4_open_expired(sp, state);
2189}
2190
f062eb6c 2191#if defined(CONFIG_NFS_V4_1)
0c116cad 2192static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2193{
f062eb6c 2194 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2195 nfs4_stateid stateid;
ab7cb0df 2196 struct nfs_delegation *delegation;
0c116cad
TM		 2197 struct rpc_cred *cred;
2198 int status;
3e60ffdd 2199
ab7cb0df
TM		 2200 /* Get the delegation credential for use by test/free_stateid */
2201 rcu_read_lock();
2202 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2203 if (delegation == NULL) {
ab7cb0df 2204 rcu_read_unlock();
0c116cad
TM		 2205 return;
2206 }
2207
2208 nfs4_stateid_copy(&stateid, &delegation->stateid);
2209 cred = get_rpccred(delegation->cred);
2210 rcu_read_unlock();
2211 status = nfs41_test_stateid(server, &stateid, cred);
2212 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2213
3e60ffdd
CL		 2214 if (status != NFS_OK) {
2215 /* Free the stateid unless the server explicitly
2216 * informs us the stateid is unrecognized. */
2217 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2218 nfs41_free_stateid(server, &stateid, cred);
2219 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2220 }
ab7cb0df 2221
0c116cad 2222 put_rpccred(cred);
3e60ffdd
CL		 2223}
2224
2225/**
2226 * nfs41_check_open_stateid - possibly free an open stateid
2227 *
2228 * @state: NFSv4 state for an inode
2229 *
2230 * Returns NFS_OK if recovery for this stateid is now finished.
2231 * Otherwise a negative NFS4ERR value is returned.
2232 */
2233static int nfs41_check_open_stateid(struct nfs4_state *state)
2234{
2235 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2236 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2237 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2238 int status;
2239
2240 /* If a state reset has been done, test_stateid is unneeded */
2241 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2242 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2243 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2244 return -NFS4ERR_BAD_STATEID;
2245
ab7cb0df 2246 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2247 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2248 if (status != NFS_OK) {
2249 /* Free the stateid unless the server explicitly
2250 * informs us the stateid is unrecognized. */
2251 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2252 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2253
2254 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2255 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2256 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2257 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2258 }
2259 return status;
2260}
2261
2262static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2263{
eb64cf96 2264 int status;
b01dd1d8 2265
0c116cad 2266 nfs41_check_delegation_stateid(state);
3e60ffdd 2267 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2268 if (status != NFS_OK)
2269 status = nfs4_open_expired(sp, state);
2270 return status;
f062eb6c
BS		 2271}
2272#endif
2273
aa53ed54
JL		 2274/*
2275 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2276 * fields corresponding to attributes that were used to store the verifier.
2277 * Make sure we clobber those fields in the later setattr call
2278 */
2279static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2280{
2281 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2282 !(sattr->ia_valid & ATTR_ATIME_SET))
2283 sattr->ia_valid |= ATTR_ATIME;
2284
2285 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2286 !(sattr->ia_valid & ATTR_MTIME_SET))
2287 sattr->ia_valid |= ATTR_MTIME;
2288}
2289
c21443c2
TM		 2290static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2291 fmode_t fmode,
2292 int flags,
3efb9722 2293 struct nfs_open_context *ctx)
c21443c2
TM		 2294{
2295 struct nfs4_state_owner *sp = opendata->owner;
2296 struct nfs_server *server = sp->so_server;
275bb307 2297 struct dentry *dentry;
c21443c2
TM		 2298 struct nfs4_state *state;
2299 unsigned int seq;
2300 int ret;
2301
2302 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2303
2304 ret = _nfs4_proc_open(opendata);
dca78001 2305 if (ret != 0)
c21443c2
TM		 2306 goto out;
2307
2308 state = nfs4_opendata_to_nfs4_state(opendata);
2309 ret = PTR_ERR(state);
2310 if (IS_ERR(state))
2311 goto out;
2312 if (server->caps & NFS_CAP_POSIX_LOCK)
2313 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2314
275bb307
TM		 2315 dentry = opendata->dentry;
2316 if (dentry->d_inode == NULL) {
2317 /* FIXME: Is this d_drop() ever needed? */
2318 d_drop(dentry);
2319 dentry = d_add_unique(dentry, igrab(state->inode));
2320 if (dentry == NULL) {
2321 dentry = opendata->dentry;
2322 } else if (dentry != ctx->dentry) {
2323 dput(ctx->dentry);
2324 ctx->dentry = dget(dentry);
2325 }
2326 nfs_set_verifier(dentry,
2327 nfs_save_change_attribute(opendata->dir->d_inode));
2328 }
2329
c21443c2
TM		 2330 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2331 if (ret != 0)
2332 goto out;
2333
3efb9722 2334 ctx->state = state;
c45ffdd2
TM		 2335 if (dentry->d_inode == state->inode) {
2336 nfs_inode_attach_open_context(ctx);
2337 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2338 nfs4_schedule_stateid_recovery(server, state);
2339 }
c21443c2
TM		 2340out:
2341 return ret;
2342}
2343
1da177e4 2344/*
24ac23ab 2345 * Returns a referenced nfs4_state
1da177e4 2346 */
82be417a 2347static int _nfs4_do_open(struct inode *dir,
4197a055 2348 struct nfs_open_context *ctx,
82be417a
AA		 2349 int flags,
2350 struct iattr *sattr,
5bc2afc2
TM		 2351 struct nfs4_label *label,
2352 int *opened)
1da177e4
LT		 2353{
2354 struct nfs4_state_owner *sp;
2355 struct nfs4_state *state = NULL;
2356 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2357 struct nfs4_opendata *opendata;
4197a055
TM		 2358 struct dentry *dentry = ctx->dentry;
2359 struct rpc_cred *cred = ctx->cred;
2360 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2361 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2362 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2363 struct nfs4_label *olabel = NULL;
aac00a8d 2364 int status;
1da177e4
LT		 2365
2366 /* Protect against reboot recovery conflicts */
1da177e4 2367 status = -ENOMEM;
d1e284d5
TM		 2368 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2369 if (sp == NULL) {
1da177e4
LT		 2370 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2371 goto out_err;
2372 }
58d9714a
TM		 2373 status = nfs4_recover_expired_lease(server);
2374 if (status != 0)
b4454fe1 2375 goto err_put_state_owner;
82a2c1b7
AV		 2376 if (dentry->d_inode != NULL)
2377 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2378 status = -ENOMEM;
49f9a0fa
TM		 2379 if (dentry->d_inode)
2380 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2381 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2382 label, claim, GFP_KERNEL);
e56e0b78 2383 if (opendata == NULL)
95d35cb4 2384 goto err_put_state_owner;
1da177e4 2385
14c43f76
DQ		 2386 if (label) {
2387 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2388 if (IS_ERR(olabel)) {
2389 status = PTR_ERR(olabel);
2390 goto err_opendata_put;
2391 }
2392 }
2393
e911b815
TM		 2394 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2395 if (!opendata->f_attr.mdsthreshold) {
2396 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2397 if (!opendata->f_attr.mdsthreshold)
2398 goto err_free_label;
2399 }
1549210f 2400 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2401 }
82a2c1b7
AV		 2402 if (dentry->d_inode != NULL)
2403 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2404
3efb9722 2405 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2406 if (status != 0)
14c43f76 2407 goto err_free_label;
3efb9722 2408 state = ctx->state;
6168f62c 2409
549b19cc
TM		 2410 if ((opendata->o_arg.open_flags & O_EXCL) &&
2411 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2412 nfs4_exclusive_attrset(opendata, sattr);
2413
2414 nfs_fattr_init(opendata->o_res.f_attr);
2415 status = nfs4_do_setattr(state->inode, cred,
2416 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2417 state, label, olabel);
2418 if (status == 0) {
f044636d
TM		 2419 nfs_setattr_update_inode(state->inode, sattr,
2420 opendata->o_res.f_attr);
aa9c2669 2421 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2422 }
0ab64e0e 2423 }
5bc2afc2
TM		 2424 if (opendata->file_created)
2425 *opened |= FILE_CREATED;
82be417a 2426
e911b815 2427 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2428 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2429 opendata->f_attr.mdsthreshold = NULL;
2430 }
82be417a 2431
14c43f76
DQ		 2432 nfs4_label_free(olabel);
2433
c6d00e63 2434 nfs4_opendata_put(opendata);
1da177e4 2435 nfs4_put_state_owner(sp);
1da177e4 2436 return 0;
14c43f76
DQ		 2437err_free_label:
2438 nfs4_label_free(olabel);
c6d00e63
TM		 2439err_opendata_put:
2440 nfs4_opendata_put(opendata);
e56e0b78
TM		 2441err_put_state_owner:
2442 nfs4_put_state_owner(sp);
1da177e4 2443out_err:
1da177e4
LT		 2444 return status;
2445}
2446
2447
82be417a 2448static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2449 struct nfs_open_context *ctx,
82be417a
AA		 2450 int flags,
2451 struct iattr *sattr,
5bc2afc2
TM		 2452 struct nfs4_label *label,
2453 int *opened)
1da177e4 2454{
49f9a0fa 2455 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2456 struct nfs4_exception exception = { };
2457 struct nfs4_state *res;
2458 int status;
2459
2460 do {
5bc2afc2 2461 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2462 res = ctx->state;
42113a75 2463 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2464 if (status == 0)
2465 break;
2466 /* NOTE: BAD_SEQID means the server and client disagree about the
2467 * book-keeping w.r.t. state-changing operations
2468 * (OPEN/CLOSE/LOCK/LOCKU...)
2469 * It is actually a sign of a bug on the client or on the server.
2470 *
2471 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2472 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2473 * have unhashed the old state_owner for us, and that we can
2474 * therefore safely retry using a new one. We should still warn
2475 * the user though...
2476 */
2477 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2478 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2479 " returned a bad sequence-id error!\n",
2480 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2481 exception.retry = 1;
2482 continue;
2483 }
550f5747
TM		 2484 /*
2485 * BAD_STATEID on OPEN means that the server cancelled our
2486 * state before it received the OPEN_CONFIRM.
2487 * Recover by retrying the request as per the discussion
2488 * on Page 181 of RFC3530.
2489 */
2490 if (status == -NFS4ERR_BAD_STATEID) {
2491 exception.retry = 1;
2492 continue;
2493 }
aac00a8d
TM		 2494 if (status == -EAGAIN) {
2495 /* We must have found a delegation */
2496 exception.retry = 1;
2497 continue;
2498 }
49f9a0fa
TM		 2499 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2500 continue;
2501 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2502 status, &exception));
2503 } while (exception.retry);
2504 return res;
2505}
2506
659bfcd6
TM		 2507static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2508 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2509 struct nfs4_state *state, struct nfs4_label *ilabel,
2510 struct nfs4_label *olabel)
1da177e4 2511{
3e4f6290 2512 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2513 struct nfs_setattrargs arg = {
3e4f6290 2514 .fh = NFS_FH(inode),
1da177e4
LT		 2515 .iap = sattr,
2516 .server = server,
2517 .bitmask = server->attr_bitmask,
1775fd3e 2518 .label = ilabel,
1da177e4
LT		 2519 };
2520 struct nfs_setattrres res = {
2521 .fattr = fattr,
1775fd3e 2522 .label = olabel,
1da177e4
LT		 2523 .server = server,
2524 };
2525 struct rpc_message msg = {
659bfcd6
TM		 2526 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2527 .rpc_argp = &arg,
2528 .rpc_resp = &res,
2529 .rpc_cred = cred,
1da177e4 2530 };
26e976a8 2531 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2532 fmode_t fmode;
2533 bool truncate;
65e4308d 2534 int status;
1da177e4 2535
aa9c2669
DQ		 2536 arg.bitmask = nfs4_bitmask(server, ilabel);
2537 if (ilabel)
2538 arg.bitmask = nfs4_bitmask(server, olabel);
2539
0e574af1 2540 nfs_fattr_init(fattr);
1da177e4 2541
ee3ae84e
TM		 2542 /* Servers should only apply open mode checks for file size changes */
2543 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2544 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2545
2546 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2547 /* Use that stateid */
0418dae1 2548 } else if (truncate && state != NULL) {
2a369153
TM		 2549 struct nfs_lockowner lockowner = {
2550 .l_owner = current->files,
2551 .l_pid = current->tgid,
2552 };
0418dae1
TM		 2553 if (!nfs4_valid_open_stateid(state))
2554 return -EBADF;
2555 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2556 &lockowner) == -EIO)
2557 return -EBADF;
08e9eac4 2558 } else
f597c537 2559 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2560
7c513058 2561 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2562 if (status == 0 && state != NULL)
2563 renew_lease(server, timestamp);
65e4308d 2564 return status;
1da177e4
LT		 2565}
2566
659bfcd6
TM		 2567static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2568 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2569 struct nfs4_state *state, struct nfs4_label *ilabel,
2570 struct nfs4_label *olabel)
1da177e4 2571{
3e4f6290 2572 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2573 struct nfs4_exception exception = {
2574 .state = state,
3114ea7a 2575 .inode = inode,
a1d0b5ee 2576 };
1da177e4
LT		 2577 int err;
2578 do {
1775fd3e 2579 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2580 trace_nfs4_setattr(inode, err);
451146be
TM		 2581 switch (err) {
2582 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2583 if (!(sattr->ia_valid & ATTR_SIZE)) {
2584 pr_warn_once("NFSv4: server %s is incorrectly "
2585 "applying open mode checks to "
2586 "a SETATTR that is not "
2587 "changing file size.\n",
2588 server->nfs_client->cl_hostname);
2589 }
451146be
TM		 2590 if (state && !(state->state & FMODE_WRITE)) {
2591 err = -EBADF;
2592 if (sattr->ia_valid & ATTR_OPEN)
2593 err = -EACCES;
2594 goto out;
2595 }
2596 }
2597 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2598 } while (exception.retry);
451146be 2599out:
1da177e4
LT		 2600 return err;
2601}
2602
2603struct nfs4_closedata {
2604 struct inode *inode;
2605 struct nfs4_state *state;
2606 struct nfs_closeargs arg;
2607 struct nfs_closeres res;
516a6af6 2608 struct nfs_fattr fattr;
26e976a8 2609 unsigned long timestamp;
f7e8917a
FI		 2610 bool roc;
2611 u32 roc_barrier;
1da177e4
LT		 2612};
2613
963d8fe5 2614static void nfs4_free_closedata(void *data)
9512135d 2615{
963d8fe5
TM		 2616 struct nfs4_closedata *calldata = data;
2617 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2618 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2619
f7e8917a
FI		 2620 if (calldata->roc)
2621 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2622 nfs4_put_open_state(calldata->state);
2623 nfs_free_seqid(calldata->arg.seqid);
9512135d 2624 nfs4_put_state_owner(sp);
322b2b90 2625 nfs_sb_deactive(sb);
9512135d
TM		 2626 kfree(calldata);
2627}
2628
963d8fe5 2629static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2630{
963d8fe5 2631 struct nfs4_closedata *calldata = data;
1da177e4 2632 struct nfs4_state *state = calldata->state;
1da177e4 2633 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2634 nfs4_stateid *res_stateid = NULL;
1da177e4 2635
a3ca5651 2636 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2637 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2638 return;
42113a75 2639 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2640 /* hmm. we are done with the inode, and in the process of freeing
2641 * the state_owner. we keep this around to process errors
2642 */
1da177e4
LT		 2643 switch (task->tk_status) {
2644 case 0:
412f6c4c
TM		 2645 res_stateid = &calldata->res.stateid;
2646 if (calldata->arg.fmode == 0 && calldata->roc)
f7e8917a
FI		 2647 pnfs_roc_set_barrier(state->inode,
2648 calldata->roc_barrier);
26e976a8 2649 renew_lease(server, calldata->timestamp);
412f6c4c 2650 break;
69794ad7 2651 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2652 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2653 case -NFS4ERR_OLD_STATEID:
2654 case -NFS4ERR_BAD_STATEID:
1da177e4 2655 case -NFS4ERR_EXPIRED:
566fcec6
TM		 2656 if (!nfs4_stateid_match(&calldata->arg.stateid,
2657 &state->stateid)) {
2658 rpc_restart_call_prepare(task);
2659 goto out_release;
2660 }
dc0b027d 2661 if (calldata->arg.fmode == 0)
9e33bed5 2662 break;
1da177e4 2663 default:
8478eaa1 2664 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2665 rpc_restart_call_prepare(task);
69794ad7
TM		 2666 goto out_release;
2667 }
1da177e4 2668 }
412f6c4c 2669 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
69794ad7 2670out_release:
72211dbe 2671 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2672 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2673 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2674}
2675
4ce70ada 2676static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2677{
4ce70ada 2678 struct nfs4_closedata *calldata = data;
9512135d 2679 struct nfs4_state *state = calldata->state;
7fdab069 2680 struct inode *inode = calldata->inode;
aee7af35 2681 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2682 int call_close = 0;
9512135d 2683
a3ca5651 2684 dprintk("%s: begin!\n", __func__);
963d8fe5 2685 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2686 goto out_wait;
003707c7 2687
88069f77 2688 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2689 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2690 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2691 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2692 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
566fcec6 2693 nfs4_stateid_copy(&calldata->arg.stateid, &state->stateid);
003707c7 2694 /* Calculate the change in open mode */
cd9288ff 2695 calldata->arg.fmode = 0;
e7616923 2696 if (state->n_rdwr == 0) {
cd9288ff
TM		 2697 if (state->n_rdonly == 0)
2698 call_close |= is_rdonly;
2699 else if (is_rdonly)
2700 calldata->arg.fmode |= FMODE_READ;
2701 if (state->n_wronly == 0)
2702 call_close |= is_wronly;
2703 else if (is_wronly)
2704 calldata->arg.fmode |= FMODE_WRITE;
2705 } else if (is_rdwr)
2706 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2707
2708 if (calldata->arg.fmode == 0)
2709 call_close |= is_rdwr;
2710
5d422301
TM		 2711 if (!nfs4_valid_open_stateid(state))
2712 call_close = 0;
4cecb76f 2713 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2714
2715 if (!call_close) {
963d8fe5 2716 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2717 goto out_no_action;
9512135d 2718 }
88069f77 2719
f7e8917a 2720 if (calldata->arg.fmode == 0) {
88069f77 2721 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2722 if (calldata->roc &&
b9536ad5
AA		 2723 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2724 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2725 goto out_wait;
b9536ad5 2726 }
f7e8917a 2727 }
6ae37339
TM		 2728 calldata->arg.share_access =
2729 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2730 calldata->arg.fmode, 0);
88069f77 2731
516a6af6 2732 nfs_fattr_init(calldata->res.fattr);
26e976a8 2733 calldata->timestamp = jiffies;
7fdab069 2734 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2735 &calldata->arg.seq_args,
2736 &calldata->res.seq_res,
2240a9e2
TM		 2737 task) != 0)
2738 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2739 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2740 return;
2741out_no_action:
2742 task->tk_action = NULL;
2743out_wait:
2744 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2745}
2746
963d8fe5 2747static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2748 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2749 .rpc_call_done = nfs4_close_done,
2750 .rpc_release = nfs4_free_closedata,
2751};
2752
fe08c546
PT		 2753static bool nfs4_roc(struct inode *inode)
2754{
40dd4b7a 2755 if (!nfs_have_layout(inode))
fe08c546 2756 return false;
fe08c546
PT		 2757 return pnfs_roc(inode);
2758}
2759
1da177e4
LT		 2760/*
2761 * It is possible for data to be read/written from a mem-mapped file
2762 * after the sys_close call (which hits the vfs layer as a flush).
2763 * This means that we can't safely call nfsv4 close on a file until
2764 * the inode is cleared. This in turn means that we are not good
2765 * NFSv4 citizens - we do not indicate to the server to update the file's
2766 * share state even when we are done with one of the three share
2767 * stateid's in the inode.
2768 *
2769 * NOTE: Caller must be holding the sp->so_owner semaphore!
2770 */
1f7977c1 2771int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2772{
4a35bd41 2773 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 2774 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 2775 struct nfs4_closedata *calldata;
b39e625b
TM		 2776 struct nfs4_state_owner *sp = state->owner;
2777 struct rpc_task *task;
5138fde0
TM		 2778 struct rpc_message msg = {
2779 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2780 .rpc_cred = state->owner->so_cred,
2781 };
c970aa85
TM		 2782 struct rpc_task_setup task_setup_data = {
2783 .rpc_client = server->client,
5138fde0 2784 .rpc_message = &msg,
c970aa85 2785 .callback_ops = &nfs4_close_ops,
101070ca 2786 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2787 .flags = RPC_TASK_ASYNC,
2788 };
9512135d 2789 int status = -ENOMEM;
1da177e4 2790
fa940720
WAA		 2791 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2792 &task_setup_data.rpc_client, &msg);
2793
8535b2be 2794 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2795 if (calldata == NULL)
9512135d 2796 goto out;
a9c92d6b 2797 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2798 calldata->inode = state->inode;
1da177e4 2799 calldata->state = state;
4a35bd41 2800 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 2801 /* Serialization for the sequence id */
63f5f796
TM		 2802 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2803 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 2804 if (IS_ERR(calldata->arg.seqid))
9512135d 2805 goto out_free_calldata;
dc0b027d 2806 calldata->arg.fmode = 0;
a65318bf 2807 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2808 calldata->res.fattr = &calldata->fattr;
c1d51931 2809 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2810 calldata->res.server = server;
fe08c546 2811 calldata->roc = nfs4_roc(state->inode);
643168c2 2812 nfs_sb_active(calldata->inode->i_sb);
9512135d 2813
1174dd1f
TM		 2814 msg.rpc_argp = &calldata->arg;
2815 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2816 task_setup_data.callback_data = calldata;
2817 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2818 if (IS_ERR(task))
2819 return PTR_ERR(task);
a49c3c77
TM		 2820 status = 0;
2821 if (wait)
2822 status = rpc_wait_for_completion_task(task);
b39e625b 2823 rpc_put_task(task);
a49c3c77 2824 return status;
9512135d
TM		 2825out_free_calldata:
2826 kfree(calldata);
2827out:
b39e625b
TM		 2828 nfs4_put_open_state(state);
2829 nfs4_put_state_owner(sp);
9512135d 2830 return status;
1da177e4
LT		 2831}
2832
2b484297 2833static struct inode *
5bc2afc2
TM		 2834nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2835 int open_flags, struct iattr *attr, int *opened)
1da177e4 2836{
1da177e4 2837 struct nfs4_state *state;
aa9c2669
DQ		 2838 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2839
2840 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2841
565277f6 2842 /* Protect against concurrent sillydeletes */
5bc2afc2 2843 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2844
2845 nfs4_label_release_security(label);
2846
f46e0bd3
TM		 2847 if (IS_ERR(state))
2848 return ERR_CAST(state);
275bb307 2849 return state->inode;
1da177e4
LT		 2850}
2851
1185a552 2852static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2853{
2854 if (ctx->state == NULL)
2855 return;
2856 if (is_sync)
643168c2 2857 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2858 else
643168c2 2859 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2860}
1da177e4 2861
b944dba3
TM		 2862#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2863#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2864#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2865
1da177e4
LT		 2866static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2867{
43652ad5
BH		 2868 struct nfs4_server_caps_arg args = {
2869 .fhandle = fhandle,
2870 };
1da177e4
LT		 2871 struct nfs4_server_caps_res res = {};
2872 struct rpc_message msg = {
2873 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2874 .rpc_argp = &args,
1da177e4
LT		 2875 .rpc_resp = &res,
2876 };
2877 int status;
2878
7c513058 2879 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2880 if (status == 0) {
b944dba3
TM		 2881 /* Sanity check the server answers */
2882 switch (server->nfs_client->cl_minorversion) {
2883 case 0:
2884 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2885 res.attr_bitmask[2] = 0;
2886 break;
2887 case 1:
2888 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2889 break;
2890 case 2:
2891 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2892 }
1da177e4 2893 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2894 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2895 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2896 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2897 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2898 NFS_CAP_CTIME|NFS_CAP_MTIME|
2899 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2900 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2901 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2902 server->caps |= NFS_CAP_ACLS;
2903 if (res.has_links != 0)
2904 server->caps |= NFS_CAP_HARDLINKS;
2905 if (res.has_symlinks != 0)
2906 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2907 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2908 server->caps |= NFS_CAP_FILEID;
2909 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2910 server->caps |= NFS_CAP_MODE;
2911 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2912 server->caps |= NFS_CAP_NLINK;
2913 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2914 server->caps |= NFS_CAP_OWNER;
2915 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2916 server->caps |= NFS_CAP_OWNER_GROUP;
2917 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2918 server->caps |= NFS_CAP_ATIME;
2919 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2920 server->caps |= NFS_CAP_CTIME;
2921 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2922 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2923#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2924 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2925 server->caps |= NFS_CAP_SECURITY_LABEL;
2926#endif
2927 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2928 sizeof(server->attr_bitmask));
b944dba3 2929 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2930
a65318bf
TM		 2931 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2932 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2933 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2934 server->cache_consistency_bitmask[2] = 0;
1da177e4 2935 server->acl_bitmask = res.acl_bitmask;
264e6351 2936 server->fh_expire_type = res.fh_expire_type;
1da177e4 2937 }
cccef3b9 2938
1da177e4
LT		 2939 return status;
2940}
2941
55a97593 2942int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2943{
2944 struct nfs4_exception exception = { };
2945 int err;
2946 do {
2947 err = nfs4_handle_exception(server,
2948 _nfs4_server_capabilities(server, fhandle),
2949 &exception);
2950 } while (exception.retry);
2951 return err;
2952}
2953
2954static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2955 struct nfs_fsinfo *info)
2956{
aa9c2669 2957 u32 bitmask[3];
1da177e4 2958 struct nfs4_lookup_root_arg args = {
aa9c2669 2959 .bitmask = bitmask,
1da177e4
LT		 2960 };
2961 struct nfs4_lookup_res res = {
2962 .server = server,
0e574af1 2963 .fattr = info->fattr,
1da177e4
LT		 2964 .fh = fhandle,
2965 };
2966 struct rpc_message msg = {
2967 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2968 .rpc_argp = &args,
2969 .rpc_resp = &res,
2970 };
008f55d0 2971
aa9c2669
DQ		 2972 bitmask[0] = nfs4_fattr_bitmap[0];
2973 bitmask[1] = nfs4_fattr_bitmap[1];
2974 /*
2975 * Process the label in the upcoming getfattr
2976 */
2977 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2978
0e574af1 2979 nfs_fattr_init(info->fattr);
7c513058 2980 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2981}
2982
2983static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2984 struct nfs_fsinfo *info)
2985{
2986 struct nfs4_exception exception = { };
2987 int err;
2988 do {
fb8a5ba8 2989 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2990 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2991 switch (err) {
2992 case 0:
2993 case -NFS4ERR_WRONGSEC:
05e9cfb4 2994 goto out;
fb8a5ba8
BS		 2995 default:
2996 err = nfs4_handle_exception(server, err, &exception);
2997 }
1da177e4 2998 } while (exception.retry);
05e9cfb4 2999out:
1da177e4
LT		 3000 return err;
3001}
3002
8f70e95f
BS		 3003static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3004 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3005{
c2190661
TM		 3006 struct rpc_auth_create_args auth_args = {
3007 .pseudoflavor = flavor,
3008 };
8f70e95f
BS		 3009 struct rpc_auth *auth;
3010 int ret;
3011
c2190661 3012 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3013 if (IS_ERR(auth)) {
75bc8821 3014 ret = -EACCES;
8f70e95f
BS		 3015 goto out;
3016 }
3017 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3018out:
3019 return ret;
3020}
3021
9a744ba3
CL		 3022/*
3023 * Retry pseudoroot lookup with various security flavors. We do this when:
3024 *
3025 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3026 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3027 *
3028 * Returns zero on success, or a negative NFS4ERR value, or a
3029 * negative errno value.
3030 */
801a16dc 3031static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3032 struct nfs_fsinfo *info)
1da177e4 3033{
9a744ba3
CL		 3034 /* Per 3530bis 15.33.5 */
3035 static const rpc_authflavor_t flav_array[] = {
3036 RPC_AUTH_GSS_KRB5P,
3037 RPC_AUTH_GSS_KRB5I,
3038 RPC_AUTH_GSS_KRB5,
c4eafe11 3039 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3040 RPC_AUTH_NULL,
3041 };
3042 int status = -EPERM;
3043 size_t i;
6a1a1e34 3044
4d4b69dd
WAA		 3045 if (server->auth_info.flavor_len > 0) {
3046 /* try each flavor specified by user */
3047 for (i = 0; i < server->auth_info.flavor_len; i++) {
3048 status = nfs4_lookup_root_sec(server, fhandle, info,
3049 server->auth_info.flavors[i]);
3050 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3051 continue;
3052 break;
3053 }
3054 } else {
3055 /* no flavors specified by user, try default list */
3056 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3057 status = nfs4_lookup_root_sec(server, fhandle, info,
3058 flav_array[i]);
3059 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3060 continue;
3061 break;
3062 }
8f70e95f 3063 }
9a744ba3 3064
fb8a5ba8
BS		 3065 /*
3066 * -EACCESS could mean that the user doesn't have correct permissions
3067 * to access the mount. It could also mean that we tried to mount
3068 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3069 * existing mount programs don't handle -EACCES very well so it should
3070 * be mapped to -EPERM instead.
3071 */
3072 if (status == -EACCES)
3073 status = -EPERM;
801a16dc
BS		 3074 return status;
3075}
3076
2ed4b95b
CL		 3077static int nfs4_do_find_root_sec(struct nfs_server *server,
3078 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3079{
3080 int mv = server->nfs_client->cl_minorversion;
3081 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3082}
3083
3084/**
3085 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3086 * @server: initialized nfs_server handle
3087 * @fhandle: we fill in the pseudo-fs root file handle
3088 * @info: we fill in an FSINFO struct
5e6b1990 3089 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3090 *
3091 * Returns zero on success, or a negative errno.
801a16dc 3092 */
3028eb2b 3093int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3094 struct nfs_fsinfo *info,
3095 bool auth_probe)
801a16dc 3096{
2ed4b95b
CL		 3097 int status;
3098
5e6b1990
TM		 3099 switch (auth_probe) {
3100 case false:
3101 status = nfs4_lookup_root(server, fhandle, info);
3102 if (status != -NFS4ERR_WRONGSEC)
3103 break;
5e6b1990 3104 default:
2ed4b95b 3105 status = nfs4_do_find_root_sec(server, fhandle, info);
5e6b1990 3106 }
2ed4b95b 3107
1da177e4
LT		 3108 if (status == 0)
3109 status = nfs4_server_capabilities(server, fhandle);
3110 if (status == 0)
3111 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3112
c12e87f4 3113 return nfs4_map_errors(status);
1da177e4
LT		 3114}
3115
bae36241
BS		 3116static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3117 struct nfs_fsinfo *info)
3118{
3119 int error;
3120 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3121 struct nfs4_label *label = NULL;
bae36241
BS		 3122
3123 error = nfs4_server_capabilities(server, mntfh);
3124 if (error < 0) {
3125 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3126 return error;
3127 }
3128
14c43f76
DQ		 3129 label = nfs4_label_alloc(server, GFP_KERNEL);
3130 if (IS_ERR(label))
3131 return PTR_ERR(label);
3132
1775fd3e 3133 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3134 if (error < 0) {
3135 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3136 goto err_free_label;
bae36241
BS		 3137 }
3138
3139 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3140 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3141 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3142
14c43f76
DQ		 3143err_free_label:
3144 nfs4_label_free(label);
3145
bae36241
BS		 3146 return error;
3147}
3148
6b97fd3d
MN		 3149/*
3150 * Get locations and (maybe) other attributes of a referral.
3151 * Note that we'll actually follow the referral later when
3152 * we detect fsid mismatch in inode revalidation
3153 */
f05d147f
BS		 3154static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3155 const struct qstr *name, struct nfs_fattr *fattr,
3156 struct nfs_fh *fhandle)
6b97fd3d
MN		 3157{
3158 int status = -ENOMEM;
3159 struct page *page = NULL;
3160 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3161
3162 page = alloc_page(GFP_KERNEL);
3163 if (page == NULL)
3164 goto out;
3165 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3166 if (locations == NULL)
3167 goto out;
3168
f05d147f 3169 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3170 if (status != 0)
3171 goto out;
519ae255
CL		 3172
3173 /*
3174 * If the fsid didn't change, this is a migration event, not a
3175 * referral. Cause us to drop into the exception handler, which
3176 * will kick off migration recovery.
3177 */
6b97fd3d 3178 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3179 dprintk("%s: server did not return a different fsid for"
3180 " a referral at %s\n", __func__, name->name);
519ae255 3181 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3182 goto out;
3183 }
533eb461
AA		 3184 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3185 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3186
533eb461 3187 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3188 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3189 memset(fhandle, 0, sizeof(struct nfs_fh));
3190out:
3191 if (page)
3192 __free_page(page);
5d7ca35a 3193 kfree(locations);
6b97fd3d
MN		 3194 return status;
3195}
3196
1775fd3e
DQ		 3197static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3198 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3199{
3200 struct nfs4_getattr_arg args = {
3201 .fh = fhandle,
3202 .bitmask = server->attr_bitmask,
3203 };
3204 struct nfs4_getattr_res res = {
3205 .fattr = fattr,
1775fd3e 3206 .label = label,
1da177e4
LT		 3207 .server = server,
3208 };
3209 struct rpc_message msg = {
3210 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3211 .rpc_argp = &args,
3212 .rpc_resp = &res,
3213 };
aa9c2669
DQ		 3214
3215 args.bitmask = nfs4_bitmask(server, label);
3216
0e574af1 3217 nfs_fattr_init(fattr);
7c513058 3218 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3219}
3220
1775fd3e
DQ		 3221static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3222 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3223{
3224 struct nfs4_exception exception = { };
3225 int err;
3226 do {
b5f875a9
TM		 3227 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3228 trace_nfs4_getattr(server, fhandle, fattr, err);
3229 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3230 &exception);
3231 } while (exception.retry);
3232 return err;
3233}
3234
3235/*
3236 * The file is not closed if it is opened due to the a request to change
3237 * the size of the file. The open call will not be needed once the
3238 * VFS layer lookup-intents are implemented.
3239 *
3240 * Close is called when the inode is destroyed.
3241 * If we haven't opened the file for O_WRONLY, we
3242 * need to in the size_change case to obtain a stateid.
3243 *
3244 * Got race?
3245 * Because OPEN is always done by name in nfsv4, it is
3246 * possible that we opened a different file by the same
3247 * name. We can recognize this race condition, but we
3248 * can't do anything about it besides returning an error.
3249 *
3250 * This will be fixed with VFS changes (lookup-intent).
3251 */
3252static int
3253nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3254 struct iattr *sattr)
3255{
08e9eac4 3256 struct inode *inode = dentry->d_inode;
659bfcd6 3257 struct rpc_cred *cred = NULL;
d530838b 3258 struct nfs4_state *state = NULL;
14c43f76 3259 struct nfs4_label *label = NULL;
1da177e4
LT		 3260 int status;
3261
88ac815c
PT		 3262 if (pnfs_ld_layoutret_on_setattr(inode) &&
3263 sattr->ia_valid & ATTR_SIZE &&
3264 sattr->ia_size < i_size_read(inode))
24028672 3265 pnfs_commit_and_return_layout(inode);
8a1636c4 3266
0e574af1 3267 nfs_fattr_init(fattr);
1da177e4 3268
2669940d
AA		 3269 /* Deal with open(O_TRUNC) */
3270 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3271 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3272
3273 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3274 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3275 return 0;
3276
d530838b 3277 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3278 if (sattr->ia_valid & ATTR_FILE) {
3279 struct nfs_open_context *ctx;
3280
3281 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3282 if (ctx) {
3283 cred = ctx->cred;
3284 state = ctx->state;
3285 }
659bfcd6 3286 }
08e9eac4 3287
14c43f76
DQ		 3288 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3289 if (IS_ERR(label))
3290 return PTR_ERR(label);
3291
3292 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3293 if (status == 0) {
f044636d 3294 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3295 nfs_setsecurity(inode, fattr, label);
3296 }
14c43f76 3297 nfs4_label_free(label);
1da177e4
LT		 3298 return status;
3299}
3300
0c2e53f1
TM		 3301static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3302 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3303 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3304{
0c2e53f1 3305 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3306 int status;
3307 struct nfs4_lookup_arg args = {
3308 .bitmask = server->attr_bitmask,
0c2e53f1 3309 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3310 .name = name,
3311 };
3312 struct nfs4_lookup_res res = {
3313 .server = server,
3314 .fattr = fattr,
aa9c2669 3315 .label = label,
2b3de441
DH		 3316 .fh = fhandle,
3317 };
3318 struct rpc_message msg = {
3319 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3320 .rpc_argp = &args,
3321 .rpc_resp = &res,
3322 };
3323
aa9c2669
DQ		 3324 args.bitmask = nfs4_bitmask(server, label);
3325
2b3de441
DH		 3326 nfs_fattr_init(fattr);
3327
1da177e4 3328 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3329 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3330 dprintk("NFS reply lookup: %d\n", status);
3331 return status;
3332}
3333
72de53ec 3334static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3335{
7ebb9315 3336 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3337 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3338 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3339 fattr->nlink = 2;
3340}
3341
72de53ec
BS		 3342static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3343 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3344 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3345{
3346 struct nfs4_exception exception = { };
72de53ec 3347 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3348 int err;
3349 do {
1775fd3e 3350 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3351 trace_nfs4_lookup(dir, name, err);
72de53ec 3352 switch (err) {
08ef7bd3 3353 case -NFS4ERR_BADNAME:
72de53ec
BS		 3354 err = -ENOENT;
3355 goto out;
0c2e53f1 3356 case -NFS4ERR_MOVED:
f05d147f 3357 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3358 goto out;
0c2e53f1 3359 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3360 err = -EPERM;
3361 if (client != *clnt)
3362 goto out;
66b06860 3363 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3364 if (IS_ERR(client))
3365 return PTR_ERR(client);
3366
3367 exception.retry = 1;
3368 break;
3369 default:
3370 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3371 }
1da177e4 3372 } while (exception.retry);
72de53ec
BS		 3373
3374out:
3375 if (err == 0)
3376 *clnt = client;
3377 else if (client != *clnt)
3378 rpc_shutdown_client(client);
3379
1da177e4
LT		 3380 return err;
3381}
3382
80a16b21 3383static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3384 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3385 struct nfs4_label *label)
72de53ec
BS		 3386{
3387 int status;
3388 struct rpc_clnt *client = NFS_CLIENT(dir);
3389
1775fd3e 3390 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3391 if (client != NFS_CLIENT(dir)) {
3392 rpc_shutdown_client(client);
3393 nfs_fixup_secinfo_attributes(fattr);
3394 }
3395 return status;
3396}
3397
f05d147f
BS		 3398struct rpc_clnt *
3399nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3400 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3401{
b72888cb 3402 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3403 int status;
f05d147f 3404
1775fd3e 3405 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3406 if (status < 0)
f05d147f 3407 return ERR_PTR(status);
b72888cb 3408 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3409}
3410
1da177e4
LT		 3411static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3412{
76b32999 3413 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3414 struct nfs4_accessargs args = {
3415 .fh = NFS_FH(inode),
a4980e78 3416 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3417 };
3418 struct nfs4_accessres res = {
3419 .server = server,
1da177e4 3420 };
1da177e4
LT		 3421 struct rpc_message msg = {
3422 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3423 .rpc_argp = &args,
3424 .rpc_resp = &res,
3425 .rpc_cred = entry->cred,
3426 };
3427 int mode = entry->mask;
aa9c2669 3428 int status = 0;
1da177e4
LT		 3429
3430 /*
3431 * Determine which access bits we want to ask for...
3432 */
3433 if (mode & MAY_READ)
3434 args.access |= NFS4_ACCESS_READ;
3435 if (S_ISDIR(inode->i_mode)) {
3436 if (mode & MAY_WRITE)
3437 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3438 if (mode & MAY_EXEC)
3439 args.access |= NFS4_ACCESS_LOOKUP;
3440 } else {
3441 if (mode & MAY_WRITE)
3442 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3443 if (mode & MAY_EXEC)
3444 args.access |= NFS4_ACCESS_EXECUTE;
3445 }
c407d41a
TM		 3446
3447 res.fattr = nfs_alloc_fattr();
3448 if (res.fattr == NULL)
3449 return -ENOMEM;
3450
7c513058 3451 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3452 if (!status) {
6168f62c 3453 nfs_access_set_mask(entry, res.access);
c407d41a 3454 nfs_refresh_inode(inode, res.fattr);
1da177e4 3455 }
c407d41a 3456 nfs_free_fattr(res.fattr);
1da177e4
LT		 3457 return status;
3458}
3459
3460static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3461{
3462 struct nfs4_exception exception = { };
3463 int err;
3464 do {
c1578b76
TM		 3465 err = _nfs4_proc_access(inode, entry);
3466 trace_nfs4_access(inode, err);
3467 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3468 &exception);
3469 } while (exception.retry);
3470 return err;
3471}
3472
3473/*
3474 * TODO: For the time being, we don't try to get any attributes
3475 * along with any of the zero-copy operations READ, READDIR,
3476 * READLINK, WRITE.
3477 *
3478 * In the case of the first three, we want to put the GETATTR
3479 * after the read-type operation -- this is because it is hard
3480 * to predict the length of a GETATTR response in v4, and thus
3481 * align the READ data correctly. This means that the GETATTR
3482 * may end up partially falling into the page cache, and we should
3483 * shift it into the 'tail' of the xdr_buf before processing.
3484 * To do this efficiently, we need to know the total length
3485 * of data received, which doesn't seem to be available outside
3486 * of the RPC layer.
3487 *
3488 * In the case of WRITE, we also want to put the GETATTR after
3489 * the operation -- in this case because we want to make sure
140150db 3490 * we get the post-operation mtime and size.
1da177e4
LT		 3491 *
3492 * Both of these changes to the XDR layer would in fact be quite
3493 * minor, but I decided to leave them for a subsequent patch.
3494 */
3495static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3496 unsigned int pgbase, unsigned int pglen)
3497{
3498 struct nfs4_readlink args = {
3499 .fh = NFS_FH(inode),
3500 .pgbase = pgbase,
3501 .pglen = pglen,
3502 .pages = &page,
3503 };
f50c7000 3504 struct nfs4_readlink_res res;
1da177e4
LT		 3505 struct rpc_message msg = {
3506 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3507 .rpc_argp = &args,
f50c7000 3508 .rpc_resp = &res,
1da177e4
LT		 3509 };
3510
7c513058 3511 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3512}
3513
3514static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3515 unsigned int pgbase, unsigned int pglen)
3516{
3517 struct nfs4_exception exception = { };
3518 int err;
3519 do {
c1578b76
TM		 3520 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3521 trace_nfs4_readlink(inode, err);
3522 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3523 &exception);
3524 } while (exception.retry);
3525 return err;
3526}
3527
1da177e4 3528/*
8867fe58 3529 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3530 */
1da177e4
LT		 3531static int
3532nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3533 int flags)
1da177e4 3534{
aa9c2669 3535 struct nfs4_label l, *ilabel = NULL;
8867fe58 3536 struct nfs_open_context *ctx;
1da177e4 3537 struct nfs4_state *state;
5bc2afc2 3538 int opened = 0;
1da177e4
LT		 3539 int status = 0;
3540
8867fe58
MS		 3541 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3542 if (IS_ERR(ctx))
3543 return PTR_ERR(ctx);
3544
aa9c2669
DQ		 3545 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3546
a8a5da99 3547 sattr->ia_mode &= ~current_umask();
5bc2afc2 3548 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3549 if (IS_ERR(state)) {
3550 status = PTR_ERR(state);
c0204fd2 3551 goto out;
1da177e4 3552 }
1da177e4 3553out:
aa9c2669 3554 nfs4_label_release_security(ilabel);
8867fe58 3555 put_nfs_open_context(ctx);
1da177e4
LT		 3556 return status;
3557}
3558
3559static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3560{
16e42959 3561 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3562 struct nfs_removeargs args = {
1da177e4 3563 .fh = NFS_FH(dir),
26fe5750 3564 .name = *name,
16e42959 3565 };
4fdc17b2 3566 struct nfs_removeres res = {
16e42959 3567 .server = server,
1da177e4 3568 };
1da177e4 3569 struct rpc_message msg = {
4fdc17b2
TM		 3570 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3571 .rpc_argp = &args,
3572 .rpc_resp = &res,
1da177e4 3573 };
778d2817 3574 int status;
1da177e4 3575
7c513058 3576 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3577 if (status == 0)
16e42959 3578 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3579 return status;
3580}
3581
3582static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3583{
3584 struct nfs4_exception exception = { };
3585 int err;
3586 do {
078ea3df
TM		 3587 err = _nfs4_proc_remove(dir, name);
3588 trace_nfs4_remove(dir, name, err);
3589 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3590 &exception);
3591 } while (exception.retry);
3592 return err;
3593}
3594
e4eff1a6 3595static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3596{
e4eff1a6
TM		 3597 struct nfs_server *server = NFS_SERVER(dir);
3598 struct nfs_removeargs *args = msg->rpc_argp;
3599 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3600
e4eff1a6 3601 res->server = server;
1da177e4 3602 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3603 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3604
3605 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3606}
3607
34e137cc
BS		 3608static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3609{
d9afbd1b
TM		 3610 nfs4_setup_sequence(NFS_SERVER(data->dir),
3611 &data->args.seq_args,
3612 &data->res.seq_res,
3613 task);
1da177e4
LT		 3614}
3615
e4eff1a6 3616static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3617{
078ea3df
TM		 3618 struct nfs_unlinkdata *data = task->tk_calldata;
3619 struct nfs_removeres *res = &data->res;
e4eff1a6 3620
14516c3a
TM		 3621 if (!nfs4_sequence_done(task, &res->seq_res))
3622 return 0;
8478eaa1
N		 3623 if (nfs4_async_handle_error(task, res->server, NULL,
3624 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3625 return 0;
3626 update_changeattr(dir, &res->cinfo);
e4eff1a6 3627 return 1;
1da177e4
LT		 3628}
3629
d3d4152a
JL		 3630static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3631{
3632 struct nfs_server *server = NFS_SERVER(dir);
3633 struct nfs_renameargs *arg = msg->rpc_argp;
3634 struct nfs_renameres *res = msg->rpc_resp;
3635
3636 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3637 res->server = server;
a9c92d6b 3638 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3639}
3640
c6bfa1a1
BS		 3641static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3642{
d9afbd1b
TM		 3643 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3644 &data->args.seq_args,
3645 &data->res.seq_res,
3646 task);
d3d4152a
JL		 3647}
3648
3649static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3650 struct inode *new_dir)
3651{
fbc6f7c2
TM		 3652 struct nfs_renamedata *data = task->tk_calldata;
3653 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3654
3655 if (!nfs4_sequence_done(task, &res->seq_res))
3656 return 0;
8478eaa1 3657 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3658 return 0;
3659
3660 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3661 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3662 return 1;
3663}
3664
1da177e4
LT		 3665static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3666{
91ba2eee 3667 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3668 struct nfs4_link_arg arg = {
3669 .fh = NFS_FH(inode),
3670 .dir_fh = NFS_FH(dir),
3671 .name = name,
91ba2eee
TM		 3672 .bitmask = server->attr_bitmask,
3673 };
91ba2eee
TM		 3674 struct nfs4_link_res res = {
3675 .server = server,
1775fd3e 3676 .label = NULL,
1da177e4 3677 };
1da177e4
LT		 3678 struct rpc_message msg = {
3679 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3680 .rpc_argp = &arg,
91ba2eee 3681 .rpc_resp = &res,
1da177e4 3682 };
136f2627
TM		 3683 int status = -ENOMEM;
3684
3685 res.fattr = nfs_alloc_fattr();
778d2817 3686 if (res.fattr == NULL)
136f2627 3687 goto out;
1da177e4 3688
14c43f76
DQ		 3689 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3690 if (IS_ERR(res.label)) {
3691 status = PTR_ERR(res.label);
3692 goto out;
3693 }
aa9c2669 3694 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3695
7c513058 3696 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3697 if (!status) {
3698 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3699 status = nfs_post_op_update_inode(inode, res.fattr);
3700 if (!status)
3701 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3702 }
14c43f76
DQ		 3703
3704
3705 nfs4_label_free(res.label);
3706
136f2627 3707out:
136f2627 3708 nfs_free_fattr(res.fattr);
1da177e4
LT		 3709 return status;
3710}
3711
3712static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3713{
3714 struct nfs4_exception exception = { };
3715 int err;
3716 do {
3717 err = nfs4_handle_exception(NFS_SERVER(inode),
3718 _nfs4_proc_link(inode, dir, name),
3719 &exception);
3720 } while (exception.retry);
3721 return err;
3722}
3723
57dc9a57
TM		 3724struct nfs4_createdata {
3725 struct rpc_message msg;
3726 struct nfs4_create_arg arg;
3727 struct nfs4_create_res res;
3728 struct nfs_fh fh;
3729 struct nfs_fattr fattr;
1775fd3e 3730 struct nfs4_label *label;
57dc9a57
TM		 3731};
3732
3733static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3734 struct qstr *name, struct iattr *sattr, u32 ftype)
3735{
3736 struct nfs4_createdata *data;
3737
3738 data = kzalloc(sizeof(*data), GFP_KERNEL);
3739 if (data != NULL) {
3740 struct nfs_server *server = NFS_SERVER(dir);
3741
14c43f76
DQ		 3742 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3743 if (IS_ERR(data->label))
3744 goto out_free;
3745
57dc9a57
TM		 3746 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3747 data->msg.rpc_argp = &data->arg;
3748 data->msg.rpc_resp = &data->res;
3749 data->arg.dir_fh = NFS_FH(dir);
3750 data->arg.server = server;
3751 data->arg.name = name;
3752 data->arg.attrs = sattr;
3753 data->arg.ftype = ftype;
aa9c2669 3754 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3755 data->res.server = server;
3756 data->res.fh = &data->fh;
3757 data->res.fattr = &data->fattr;
1775fd3e 3758 data->res.label = data->label;
57dc9a57 3759 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3760 }
3761 return data;
14c43f76
DQ		 3762out_free:
3763 kfree(data);
3764 return NULL;
57dc9a57
TM		 3765}
3766
3767static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3768{
7c513058 3769 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3770 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3771 if (status == 0) {
3772 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3773 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3774 }
3775 return status;
3776}
3777
3778static void nfs4_free_createdata(struct nfs4_createdata *data)
3779{
14c43f76 3780 nfs4_label_free(data->label);
57dc9a57
TM		 3781 kfree(data);
3782}
3783
4f390c15 3784static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3785 struct page *page, unsigned int len, struct iattr *sattr,
3786 struct nfs4_label *label)
1da177e4 3787{
57dc9a57
TM		 3788 struct nfs4_createdata *data;
3789 int status = -ENAMETOOLONG;
1da177e4 3790
94a6d753 3791 if (len > NFS4_MAXPATHLEN)
57dc9a57 3792 goto out;
4f390c15 3793
57dc9a57
TM		 3794 status = -ENOMEM;
3795 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3796 if (data == NULL)
3797 goto out;
3798
3799 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3800 data->arg.u.symlink.pages = &page;
3801 data->arg.u.symlink.len = len;
1775fd3e 3802 data->arg.label = label;
1da177e4 3803
57dc9a57
TM		 3804 status = nfs4_do_create(dir, dentry, data);
3805
3806 nfs4_free_createdata(data);
3807out:
1da177e4
LT		 3808 return status;
3809}
3810
4f390c15 3811static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3812 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3813{
3814 struct nfs4_exception exception = { };
aa9c2669 3815 struct nfs4_label l, *label = NULL;
1da177e4 3816 int err;
aa9c2669
DQ		 3817
3818 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3819
1da177e4 3820 do {
078ea3df
TM		 3821 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3822 trace_nfs4_symlink(dir, &dentry->d_name, err);
3823 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3824 &exception);
3825 } while (exception.retry);
aa9c2669
DQ		 3826
3827 nfs4_label_release_security(label);
1da177e4
LT		 3828 return err;
3829}
3830
3831static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3832 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3833{
57dc9a57
TM		 3834 struct nfs4_createdata *data;
3835 int status = -ENOMEM;
1da177e4 3836
57dc9a57
TM		 3837 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3838 if (data == NULL)
3839 goto out;
3840
1775fd3e 3841 data->arg.label = label;
57dc9a57
TM		 3842 status = nfs4_do_create(dir, dentry, data);
3843
3844 nfs4_free_createdata(data);
3845out:
1da177e4
LT		 3846 return status;
3847}
3848
3849static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3850 struct iattr *sattr)
3851{
3852 struct nfs4_exception exception = { };
aa9c2669 3853 struct nfs4_label l, *label = NULL;
1da177e4 3854 int err;
a8a5da99 3855
aa9c2669
DQ		 3856 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3857
a8a5da99 3858 sattr->ia_mode &= ~current_umask();
1da177e4 3859 do {
078ea3df
TM		 3860 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3861 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3862 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3863 &exception);
3864 } while (exception.retry);
aa9c2669
DQ		 3865 nfs4_label_release_security(label);
3866
1da177e4
LT		 3867 return err;
3868}
3869
3870static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3871 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3872{
3873 struct inode *dir = dentry->d_inode;
3874 struct nfs4_readdir_arg args = {
3875 .fh = NFS_FH(dir),
56e4ebf8 3876 .pages = pages,
1da177e4
LT		 3877 .pgbase = 0,
3878 .count = count,
96d25e53 3879 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3880 .plus = plus,
1da177e4
LT		 3881 };
3882 struct nfs4_readdir_res res;
3883 struct rpc_message msg = {
3884 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3885 .rpc_argp = &args,
3886 .rpc_resp = &res,
3887 .rpc_cred = cred,
3888 };
3889 int status;
3890
6de1472f
AV		 3891 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3892 dentry,
eadf4598 3893 (unsigned long long)cookie);
c3f52af3 3894 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3895 res.pgbase = args.pgbase;
7c513058 3896 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3897 if (status >= 0) {
c3f52af3 3898 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3899 status += args.pgbase;
3900 }
c4812998
TM		 3901
3902 nfs_invalidate_atime(dir);
3903
3110ff80 3904 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3905 return status;
3906}
3907
3908static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3909 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3910{
3911 struct nfs4_exception exception = { };
3912 int err;
3913 do {
c1578b76
TM		 3914 err = _nfs4_proc_readdir(dentry, cred, cookie,
3915 pages, count, plus);
3916 trace_nfs4_readdir(dentry->d_inode, err);
3917 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3918 &exception);
3919 } while (exception.retry);
3920 return err;
3921}
3922
3923static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3924 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3925{
57dc9a57
TM		 3926 struct nfs4_createdata *data;
3927 int mode = sattr->ia_mode;
3928 int status = -ENOMEM;
1da177e4 3929
57dc9a57
TM		 3930 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3931 if (data == NULL)
3932 goto out;
3933
1da177e4 3934 if (S_ISFIFO(mode))
57dc9a57 3935 data->arg.ftype = NF4FIFO;
1da177e4 3936 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3937 data->arg.ftype = NF4BLK;
3938 data->arg.u.device.specdata1 = MAJOR(rdev);
3939 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3940 }
3941 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3942 data->arg.ftype = NF4CHR;
3943 data->arg.u.device.specdata1 = MAJOR(rdev);
3944 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3945 } else if (!S_ISSOCK(mode)) {
3946 status = -EINVAL;
3947 goto out_free;
1da177e4 3948 }
1775fd3e 3949
aa9c2669 3950 data->arg.label = label;
57dc9a57 3951 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3952out_free:
57dc9a57
TM		 3953 nfs4_free_createdata(data);
3954out:
1da177e4
LT		 3955 return status;
3956}
3957
3958static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3959 struct iattr *sattr, dev_t rdev)
3960{
3961 struct nfs4_exception exception = { };
aa9c2669 3962 struct nfs4_label l, *label = NULL;
1da177e4 3963 int err;
a8a5da99 3964
aa9c2669
DQ		 3965 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3966
a8a5da99 3967 sattr->ia_mode &= ~current_umask();
1da177e4 3968 do {
078ea3df
TM		 3969 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3970 trace_nfs4_mknod(dir, &dentry->d_name, err);
3971 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3972 &exception);
3973 } while (exception.retry);
aa9c2669
DQ		 3974
3975 nfs4_label_release_security(label);
3976
1da177e4
LT		 3977 return err;
3978}
3979
3980static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3981 struct nfs_fsstat *fsstat)
3982{
3983 struct nfs4_statfs_arg args = {
3984 .fh = fhandle,
3985 .bitmask = server->attr_bitmask,
3986 };
24ad148a
BH		 3987 struct nfs4_statfs_res res = {
3988 .fsstat = fsstat,
3989 };
1da177e4
LT		 3990 struct rpc_message msg = {
3991 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3992 .rpc_argp = &args,
24ad148a 3993 .rpc_resp = &res,
1da177e4
LT		 3994 };
3995
0e574af1 3996 nfs_fattr_init(fsstat->fattr);
7c513058 3997 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3998}
3999
4000static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4001{
4002 struct nfs4_exception exception = { };
4003 int err;
4004 do {
4005 err = nfs4_handle_exception(server,
4006 _nfs4_proc_statfs(server, fhandle, fsstat),
4007 &exception);
4008 } while (exception.retry);
4009 return err;
4010}
4011
4012static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4013 struct nfs_fsinfo *fsinfo)
4014{
4015 struct nfs4_fsinfo_arg args = {
4016 .fh = fhandle,
4017 .bitmask = server->attr_bitmask,
4018 };
3dda5e43
BH		 4019 struct nfs4_fsinfo_res res = {
4020 .fsinfo = fsinfo,
4021 };
1da177e4
LT		 4022 struct rpc_message msg = {
4023 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4024 .rpc_argp = &args,
3dda5e43 4025 .rpc_resp = &res,
1da177e4
LT		 4026 };
4027
7c513058 4028 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4029}
4030
4031static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4032{
4033 struct nfs4_exception exception = { };
83ca7f5a 4034 unsigned long now = jiffies;
1da177e4
LT		 4035 int err;
4036
4037 do {
83ca7f5a 4038 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4039 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4040 if (err == 0) {
4041 struct nfs_client *clp = server->nfs_client;
4042
4043 spin_lock(&clp->cl_lock);
4044 clp->cl_lease_time = fsinfo->lease_time * HZ;
4045 clp->cl_last_renewal = now;
4046 spin_unlock(&clp->cl_lock);
4047 break;
4048 }
4049 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4050 } while (exception.retry);
4051 return err;
4052}
4053
4054static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4055{
e38eb650
BS		 4056 int error;
4057
0e574af1 4058 nfs_fattr_init(fsinfo->fattr);
e38eb650 4059 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4060 if (error == 0) {
4061 /* block layout checks this! */
4062 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4063 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4064 }
e38eb650
BS		 4065
4066 return error;
1da177e4
LT		 4067}
4068
4069static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4070 struct nfs_pathconf *pathconf)
4071{
4072 struct nfs4_pathconf_arg args = {
4073 .fh = fhandle,
4074 .bitmask = server->attr_bitmask,
4075 };
d45b2989
BH		 4076 struct nfs4_pathconf_res res = {
4077 .pathconf = pathconf,
4078 };
1da177e4
LT		 4079 struct rpc_message msg = {
4080 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4081 .rpc_argp = &args,
d45b2989 4082 .rpc_resp = &res,
1da177e4
LT		 4083 };
4084
4085 /* None of the pathconf attributes are mandatory to implement */
4086 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4087 memset(pathconf, 0, sizeof(*pathconf));
4088 return 0;
4089 }
4090
0e574af1 4091 nfs_fattr_init(pathconf->fattr);
7c513058 4092 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4093}
4094
4095static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4096 struct nfs_pathconf *pathconf)
4097{
4098 struct nfs4_exception exception = { };
4099 int err;
4100
4101 do {
4102 err = nfs4_handle_exception(server,
4103 _nfs4_proc_pathconf(server, fhandle, pathconf),
4104 &exception);
4105 } while (exception.retry);
4106 return err;
4107}
4108
5521abfd 4109int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4110 const struct nfs_open_context *ctx,
4111 const struct nfs_lock_context *l_ctx,
4112 fmode_t fmode)
4113{
4114 const struct nfs_lockowner *lockowner = NULL;
4115
4116 if (l_ctx != NULL)
4117 lockowner = &l_ctx->lockowner;
5521abfd 4118 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4119}
4120EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4121
5521abfd
TM		 4122static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4123 const struct nfs_open_context *ctx,
4124 const struct nfs_lock_context *l_ctx,
4125 fmode_t fmode)
4126{
4127 nfs4_stateid current_stateid;
4128
e1253be0
TM		 4129 /* If the current stateid represents a lost lock, then exit */
4130 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4131 return true;
5521abfd
TM		 4132 return nfs4_stateid_match(stateid, &current_stateid);
4133}
4134
4135static bool nfs4_error_stateid_expired(int err)
4136{
4137 switch (err) {
4138 case -NFS4ERR_DELEG_REVOKED:
4139 case -NFS4ERR_ADMIN_REVOKED:
4140 case -NFS4ERR_BAD_STATEID:
4141 case -NFS4ERR_STALE_STATEID:
4142 case -NFS4ERR_OLD_STATEID:
4143 case -NFS4ERR_OPENMODE:
4144 case -NFS4ERR_EXPIRED:
4145 return true;
4146 }
4147 return false;
4148}
4149
d45f60c6 4150void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4151{
d45f60c6 4152 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4153}
4154
d45f60c6 4155static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4156{
d45f60c6 4157 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4158
d45f60c6
WAA		 4159 trace_nfs4_read(hdr, task->tk_status);
4160 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4161 hdr->args.context->state,
4162 NULL) == -EAGAIN) {
d00c5d43 4163 rpc_restart_call_prepare(task);
ec06c096 4164 return -EAGAIN;
1da177e4 4165 }
8850df99 4166
d45f60c6 4167 __nfs4_read_done_cb(hdr);
1da177e4 4168 if (task->tk_status > 0)
d45f60c6 4169 renew_lease(server, hdr->timestamp);
ec06c096 4170 return 0;
1da177e4
LT		 4171}
4172
5521abfd 4173static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4174 struct nfs_pgio_args *args)
5521abfd
TM		 4175{
4176
4177 if (!nfs4_error_stateid_expired(task->tk_status) ||
4178 nfs4_stateid_is_current(&args->stateid,
4179 args->context,
4180 args->lock_context,
4181 FMODE_READ))
4182 return false;
4183 rpc_restart_call_prepare(task);
4184 return true;
4185}
4186
d45f60c6 4187static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4188{
4189
4190 dprintk("--> %s\n", __func__);
4191
d45f60c6 4192 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4193 return -EAGAIN;
d45f60c6 4194 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4195 return -EAGAIN;
d45f60c6
WAA		 4196 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4197 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4198}
4199
d45f60c6
WAA		 4200static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4201 struct rpc_message *msg)
1da177e4 4202{
d45f60c6
WAA		 4203 hdr->timestamp = jiffies;
4204 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4205 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4206 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4207}
4208
d45f60c6
WAA		 4209static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4210 struct nfs_pgio_header *hdr)
ea7c3303 4211{
d45f60c6
WAA		 4212 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4213 &hdr->args.seq_args,
4214 &hdr->res.seq_res,
9b206149 4215 task))
ef1820f9 4216 return 0;
d45f60c6
WAA		 4217 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4218 hdr->args.lock_context,
4219 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4220 return -EIO;
d45f60c6 4221 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4222 return -EIO;
4223 return 0;
1da177e4
LT		 4224}
4225
d45f60c6
WAA		 4226static int nfs4_write_done_cb(struct rpc_task *task,
4227 struct nfs_pgio_header *hdr)
1da177e4 4228{
d45f60c6 4229 struct inode *inode = hdr->inode;
8478eaa1 4230
d45f60c6
WAA		 4231 trace_nfs4_write(hdr, task->tk_status);
4232 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4233 hdr->args.context->state,
4234 NULL) == -EAGAIN) {
d00c5d43 4235 rpc_restart_call_prepare(task);
788e7a89 4236 return -EAGAIN;
1da177e4 4237 }
4f9838c7 4238 if (task->tk_status >= 0) {
d45f60c6
WAA		 4239 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4240 nfs_post_op_update_inode_force_wcc(inode, &hdr->fattr);
4f9838c7 4241 }
788e7a89 4242 return 0;
1da177e4
LT		 4243}
4244
5521abfd 4245static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4246 struct nfs_pgio_args *args)
5521abfd
TM		 4247{
4248
4249 if (!nfs4_error_stateid_expired(task->tk_status) ||
4250 nfs4_stateid_is_current(&args->stateid,
4251 args->context,
4252 args->lock_context,
4253 FMODE_WRITE))
4254 return false;
4255 rpc_restart_call_prepare(task);
4256 return true;
4257}
4258
d45f60c6 4259static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4260{
d45f60c6 4261 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4262 return -EAGAIN;
d45f60c6 4263 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4264 return -EAGAIN;
d45f60c6
WAA		 4265 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4266 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4267}
4268
5a37f851 4269static
d45f60c6 4270bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4271{
5a37f851 4272 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4273 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4274 return false;
4275 /* Otherwise, request attributes if and only if we don't hold
4276 * a delegation
4277 */
011e2a7f 4278 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4279}
a69aef14 4280
d45f60c6
WAA		 4281static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4282 struct rpc_message *msg)
1da177e4 4283{
d45f60c6 4284 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4285
d45f60c6
WAA		 4286 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4287 hdr->args.bitmask = NULL;
4288 hdr->res.fattr = NULL;
7ffd1064 4289 } else
d45f60c6 4290 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4291
d45f60c6
WAA		 4292 if (!hdr->pgio_done_cb)
4293 hdr->pgio_done_cb = nfs4_write_done_cb;
4294 hdr->res.server = server;
4295 hdr->timestamp = jiffies;
1da177e4 4296
bdc7f021 4297 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4298 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4299}
4300
0b7c0153 4301static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4302{
d9afbd1b
TM		 4303 nfs4_setup_sequence(NFS_SERVER(data->inode),
4304 &data->args.seq_args,
4305 &data->res.seq_res,
4306 task);
1da177e4
LT		 4307}
4308
0b7c0153 4309static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4310{
1da177e4 4311 struct inode *inode = data->inode;
14516c3a 4312
cc668ab3 4313 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4314 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4315 NULL, NULL) == -EAGAIN) {
d00c5d43 4316 rpc_restart_call_prepare(task);
788e7a89 4317 return -EAGAIN;
1da177e4 4318 }
788e7a89 4319 return 0;
1da177e4
LT		 4320}
4321
0b7c0153 4322static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4323{
4324 if (!nfs4_sequence_done(task, &data->res.seq_res))
4325 return -EAGAIN;
0b7c0153 4326 return data->commit_done_cb(task, data);
5f452431
FI		 4327}
4328
0b7c0153 4329static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4330{
788e7a89 4331 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4332
0b7c0153
FI		 4333 if (data->commit_done_cb == NULL)
4334 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4335 data->res.server = server;
bdc7f021 4336 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4337 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4338}
4339
9bc4e3ca
CL		 4340struct nfs4_renewdata {
4341 struct nfs_client *client;
4342 unsigned long timestamp;
4343};
4344
1da177e4
LT		 4345/*
4346 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4347 * standalone procedure for queueing an asynchronous RENEW.
4348 */
9bc4e3ca 4349static void nfs4_renew_release(void *calldata)
dc96aef9 4350{
9bc4e3ca
CL		 4351 struct nfs4_renewdata *data = calldata;
4352 struct nfs_client *clp = data->client;
dc96aef9 4353
0851de06
AB		 4354 if (atomic_read(&clp->cl_count) > 1)
4355 nfs4_schedule_state_renewal(clp);
4356 nfs_put_client(clp);
9bc4e3ca 4357 kfree(data);
dc96aef9
AB		 4358}
4359
9bc4e3ca 4360static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4361{
9bc4e3ca
CL		 4362 struct nfs4_renewdata *data = calldata;
4363 struct nfs_client *clp = data->client;
4364 unsigned long timestamp = data->timestamp;
1da177e4 4365
c6d01c6f 4366 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4367 switch (task->tk_status) {
4368 case 0:
4369 break;
4370 case -NFS4ERR_LEASE_MOVED:
4371 nfs4_schedule_lease_moved_recovery(clp);
4372 break;
4373 default:
95baa25c 4374 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4375 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4376 return;
4377 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4378 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4379 return;
4380 }
4381 nfs4_schedule_path_down_recovery(clp);
1da177e4 4382 }
452e9352 4383 do_renew_lease(clp, timestamp);
1da177e4
LT		 4384}
4385
963d8fe5
TM		 4386static const struct rpc_call_ops nfs4_renew_ops = {
4387 .rpc_call_done = nfs4_renew_done,
dc96aef9 4388 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4389};
4390
2f60ea6b 4391static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4392{
4393 struct rpc_message msg = {
4394 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4395 .rpc_argp = clp,
b4454fe1 4396 .rpc_cred = cred,
1da177e4 4397 };
9bc4e3ca 4398 struct nfs4_renewdata *data;
1da177e4 4399
2f60ea6b
TM		 4400 if (renew_flags == 0)
4401 return 0;
0851de06
AB		 4402 if (!atomic_inc_not_zero(&clp->cl_count))
4403 return -EIO;
b569ad34 4404 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4405 if (data == NULL)
4406 return -ENOMEM;
4407 data->client = clp;
4408 data->timestamp = jiffies;
bc7a05ca 4409 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4410 &nfs4_renew_ops, data);
1da177e4
LT		 4411}
4412
8534d4ec 4413static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4414{
4415 struct rpc_message msg = {
4416 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4417 .rpc_argp = clp,
b4454fe1 4418 .rpc_cred = cred,
1da177e4
LT		 4419 };
4420 unsigned long now = jiffies;
4421 int status;
4422
bc7a05ca 4423 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4424 if (status < 0)
4425 return status;
452e9352 4426 do_renew_lease(clp, now);
1da177e4
LT		 4427 return 0;
4428}
4429
aa1870af
BF		 4430static inline int nfs4_server_supports_acls(struct nfs_server *server)
4431{
7dd7d959 4432 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4433}
4434
21f498c2
TM		 4435/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4436 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4437 * the stack.
4438 */
21f498c2 4439#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4440
e9e3d724
NH		 4441static int buf_to_pages_noslab(const void *buf, size_t buflen,
4442 struct page **pages, unsigned int *pgbase)
4443{
4444 struct page *newpage, **spages;
4445 int rc = 0;
4446 size_t len;
4447 spages = pages;
4448
4449 do {
21f498c2 4450 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4451 newpage = alloc_page(GFP_KERNEL);
4452
4453 if (newpage == NULL)
4454 goto unwind;
4455 memcpy(page_address(newpage), buf, len);
4456 buf += len;
4457 buflen -= len;
4458 *pages++ = newpage;
4459 rc++;
4460 } while (buflen != 0);
4461
4462 return rc;
4463
4464unwind:
4465 for(; rc > 0; rc--)
4466 __free_page(spages[rc-1]);
4467 return -ENOMEM;
4468}
4469
e50a1c2e
BF		 4470struct nfs4_cached_acl {
4471 int cached;
4472 size_t len;
3e9d4154 4473 char data[0];
e50a1c2e
BF		 4474};
4475
4476static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4477{
4478 struct nfs_inode *nfsi = NFS_I(inode);
4479
4480 spin_lock(&inode->i_lock);
4481 kfree(nfsi->nfs4_acl);
4482 nfsi->nfs4_acl = acl;
4483 spin_unlock(&inode->i_lock);
4484}
4485
4486static void nfs4_zap_acl_attr(struct inode *inode)
4487{
4488 nfs4_set_cached_acl(inode, NULL);
4489}
4490
4491static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4492{
4493 struct nfs_inode *nfsi = NFS_I(inode);
4494 struct nfs4_cached_acl *acl;
4495 int ret = -ENOENT;
4496
4497 spin_lock(&inode->i_lock);
4498 acl = nfsi->nfs4_acl;
4499 if (acl == NULL)
4500 goto out;
4501 if (buf == NULL) /* user is just asking for length */
4502 goto out_len;
4503 if (acl->cached == 0)
4504 goto out;
4505 ret = -ERANGE; /* see getxattr(2) man page */
4506 if (acl->len > buflen)
4507 goto out;
4508 memcpy(buf, acl->data, acl->len);
4509out_len:
4510 ret = acl->len;
4511out:
4512 spin_unlock(&inode->i_lock);
4513 return ret;
4514}
4515
5794d21e 4516static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4517{
4518 struct nfs4_cached_acl *acl;
b291f1b1 4519 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4520
1f1ea6c2 4521 if (buflen <= PAGE_SIZE) {
b291f1b1 4522 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4523 if (acl == NULL)
4524 goto out;
4525 acl->cached = 1;
5794d21e 4526 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4527 } else {
4528 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4529 if (acl == NULL)
4530 goto out;
4531 acl->cached = 0;
4532 }
4533 acl->len = acl_len;
4534out:
4535 nfs4_set_cached_acl(inode, acl);
4536}
4537
bf118a34
AA		 4538/*
4539 * The getxattr API returns the required buffer length when called with a
4540 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4541 * the required buf. On a NULL buf, we send a page of data to the server
4542 * guessing that the ACL request can be serviced by a page. If so, we cache
4543 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4544 * the cache. If not so, we throw away the page, and cache the required
4545 * length. The next getxattr call will then produce another round trip to
4546 * the server, this time with the input buf of the required size.
4547 */
16b4289c 4548static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4549{
bf118a34 4550 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4551 struct nfs_getaclargs args = {
4552 .fh = NFS_FH(inode),
4553 .acl_pages = pages,
4554 .acl_len = buflen,
4555 };
663c79b3
BH		 4556 struct nfs_getaclres res = {
4557 .acl_len = buflen,
4558 };
aa1870af
BF		 4559 struct rpc_message msg = {
4560 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4561 .rpc_argp = &args,
663c79b3 4562 .rpc_resp = &res,
aa1870af 4563 };
21f498c2
TM		 4564 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4565 int ret = -ENOMEM, i;
aa1870af 4566
bf118a34
AA		 4567 /* As long as we're doing a round trip to the server anyway,
4568 * let's be prepared for a page of acl data. */
4569 if (npages == 0)
4570 npages = 1;
21f498c2
TM		 4571 if (npages > ARRAY_SIZE(pages))
4572 return -ERANGE;
5a006899 4573
bf118a34
AA		 4574 for (i = 0; i < npages; i++) {
4575 pages[i] = alloc_page(GFP_KERNEL);
4576 if (!pages[i])
4577 goto out_free;
e50a1c2e 4578 }
5a006899
SP		 4579
4580 /* for decoding across pages */
4581 res.acl_scratch = alloc_page(GFP_KERNEL);
4582 if (!res.acl_scratch)
4583 goto out_free;
4584
bf118a34
AA		 4585 args.acl_len = npages * PAGE_SIZE;
4586 args.acl_pgbase = 0;
5a006899 4587
de040bec 4588 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4589 __func__, buf, buflen, npages, args.acl_len);
4590 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4591 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4592 if (ret)
4593 goto out_free;
bf118a34 4594
1f1ea6c2
TM		 4595 /* Handle the case where the passed-in buffer is too short */
4596 if (res.acl_flags & NFS4_ACL_TRUNC) {
4597 /* Did the user only issue a request for the acl length? */
4598 if (buf == NULL)
4599 goto out_ok;
e50a1c2e 4600 ret = -ERANGE;
1f1ea6c2 4601 goto out_free;
e50a1c2e 4602 }
1f1ea6c2 4603 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4604 if (buf) {
4605 if (res.acl_len > buflen) {
4606 ret = -ERANGE;
4607 goto out_free;
4608 }
1f1ea6c2 4609 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4610 }
1f1ea6c2
TM		 4611out_ok:
4612 ret = res.acl_len;
e50a1c2e 4613out_free:
bf118a34
AA		 4614 for (i = 0; i < npages; i++)
4615 if (pages[i])
4616 __free_page(pages[i]);
331818f1
TM		 4617 if (res.acl_scratch)
4618 __free_page(res.acl_scratch);
aa1870af
BF		 4619 return ret;
4620}
4621
16b4289c
TM		 4622static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4623{
4624 struct nfs4_exception exception = { };
4625 ssize_t ret;
4626 do {
4627 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4628 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4629 if (ret >= 0)
4630 break;
4631 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4632 } while (exception.retry);
4633 return ret;
4634}
4635
e50a1c2e
BF		 4636static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4637{
4638 struct nfs_server *server = NFS_SERVER(inode);
4639 int ret;
4640
4641 if (!nfs4_server_supports_acls(server))
4642 return -EOPNOTSUPP;
4643 ret = nfs_revalidate_inode(server, inode);
4644 if (ret < 0)
4645 return ret;
08a22b39
AK		 4646 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4647 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4648 ret = nfs4_read_cached_acl(inode, buf, buflen);
4649 if (ret != -ENOENT)
bf118a34
AA		 4650 /* -ENOENT is returned if there is no ACL or if there is an ACL
4651 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4652 return ret;
4653 return nfs4_get_acl_uncached(inode, buf, buflen);
4654}
4655
16b4289c 4656static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4657{
4658 struct nfs_server *server = NFS_SERVER(inode);
4659 struct page *pages[NFS4ACL_MAXPAGES];
4660 struct nfs_setaclargs arg = {
4661 .fh = NFS_FH(inode),
4662 .acl_pages = pages,
4663 .acl_len = buflen,
4664 };
73c403a9 4665 struct nfs_setaclres res;
4b580ee3
BF		 4666 struct rpc_message msg = {
4667 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4668 .rpc_argp = &arg,
73c403a9 4669 .rpc_resp = &res,
4b580ee3 4670 };
21f498c2 4671 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4672 int ret, i;
4b580ee3
BF		 4673
4674 if (!nfs4_server_supports_acls(server))
4675 return -EOPNOTSUPP;
21f498c2
TM		 4676 if (npages > ARRAY_SIZE(pages))
4677 return -ERANGE;
e9e3d724
NH		 4678 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4679 if (i < 0)
4680 return i;
57ec14c5 4681 nfs4_inode_return_delegation(inode);
7c513058 4682 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4683
4684 /*
4685 * Free each page after tx, so the only ref left is
4686 * held by the network stack
4687 */
4688 for (; i > 0; i--)
4689 put_page(pages[i-1]);
4690
08a22b39
AK		 4691 /*
4692 * Acl update can result in inode attribute update.
4693 * so mark the attribute cache invalid.
4694 */
4695 spin_lock(&inode->i_lock);
4696 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4697 spin_unlock(&inode->i_lock);
f41f7418
TM		 4698 nfs_access_zap_cache(inode);
4699 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4700 return ret;
4701}
4702
16b4289c
TM		 4703static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4704{
4705 struct nfs4_exception exception = { };
4706 int err;
4707 do {
c1578b76
TM		 4708 err = __nfs4_proc_set_acl(inode, buf, buflen);
4709 trace_nfs4_set_acl(inode, err);
4710 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4711 &exception);
4712 } while (exception.retry);
4713 return err;
4714}
4715
aa9c2669
DQ		 4716#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4717static int _nfs4_get_security_label(struct inode *inode, void *buf,
4718 size_t buflen)
4719{
4720 struct nfs_server *server = NFS_SERVER(inode);
4721 struct nfs_fattr fattr;
4722 struct nfs4_label label = {0, 0, buflen, buf};
4723
4724 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4725 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4726 .fh = NFS_FH(inode),
4727 .bitmask = bitmask,
4728 };
4729 struct nfs4_getattr_res res = {
4730 .fattr = &fattr,
4731 .label = &label,
4732 .server = server,
4733 };
4734 struct rpc_message msg = {
4735 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4736 .rpc_argp = &arg,
aa9c2669
DQ		 4737 .rpc_resp = &res,
4738 };
4739 int ret;
4740
4741 nfs_fattr_init(&fattr);
4742
fcb63a9b 4743 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4744 if (ret)
4745 return ret;
4746 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4747 return -ENOENT;
4748 if (buflen < label.len)
4749 return -ERANGE;
4750 return 0;
4751}
4752
4753static int nfs4_get_security_label(struct inode *inode, void *buf,
4754 size_t buflen)
4755{
4756 struct nfs4_exception exception = { };
4757 int err;
4758
4759 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4760 return -EOPNOTSUPP;
4761
4762 do {
c1578b76
TM		 4763 err = _nfs4_get_security_label(inode, buf, buflen);
4764 trace_nfs4_get_security_label(inode, err);
4765 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4766 &exception);
4767 } while (exception.retry);
4768 return err;
4769}
4770
4771static int _nfs4_do_set_security_label(struct inode *inode,
4772 struct nfs4_label *ilabel,
4773 struct nfs_fattr *fattr,
4774 struct nfs4_label *olabel)
4775{
4776
4777 struct iattr sattr = {0};
4778 struct nfs_server *server = NFS_SERVER(inode);
4779 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4780 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4781 .fh = NFS_FH(inode),
4782 .iap = &sattr,
4783 .server = server,
4784 .bitmask = bitmask,
4785 .label = ilabel,
4786 };
4787 struct nfs_setattrres res = {
4788 .fattr = fattr,
4789 .label = olabel,
4790 .server = server,
4791 };
4792 struct rpc_message msg = {
4793 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4794 .rpc_argp = &arg,
aa9c2669
DQ		 4795 .rpc_resp = &res,
4796 };
4797 int status;
4798
12207f69 4799 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4800
12207f69 4801 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4802 if (status)
4803 dprintk("%s failed: %d\n", __func__, status);
4804
4805 return status;
4806}
4807
4808static int nfs4_do_set_security_label(struct inode *inode,
4809 struct nfs4_label *ilabel,
4810 struct nfs_fattr *fattr,
4811 struct nfs4_label *olabel)
4812{
4813 struct nfs4_exception exception = { };
4814 int err;
4815
4816 do {
c1578b76
TM		 4817 err = _nfs4_do_set_security_label(inode, ilabel,
4818 fattr, olabel);
4819 trace_nfs4_set_security_label(inode, err);
4820 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4821 &exception);
4822 } while (exception.retry);
4823 return err;
4824}
4825
4826static int
4827nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4828{
4829 struct nfs4_label ilabel, *olabel = NULL;
4830 struct nfs_fattr fattr;
4831 struct rpc_cred *cred;
4832 struct inode *inode = dentry->d_inode;
4833 int status;
4834
4835 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4836 return -EOPNOTSUPP;
4837
4838 nfs_fattr_init(&fattr);
4839
4840 ilabel.pi = 0;
4841 ilabel.lfs = 0;
4842 ilabel.label = (char *)buf;
4843 ilabel.len = buflen;
4844
4845 cred = rpc_lookup_cred();
4846 if (IS_ERR(cred))
4847 return PTR_ERR(cred);
4848
4849 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4850 if (IS_ERR(olabel)) {
4851 status = -PTR_ERR(olabel);
4852 goto out;
4853 }
4854
4855 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4856 if (status == 0)
4857 nfs_setsecurity(inode, &fattr, olabel);
4858
4859 nfs4_label_free(olabel);
4860out:
4861 put_rpccred(cred);
4862 return status;
4863}
4864#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4865
4866
1da177e4 4867static int
8478eaa1
N		 4868nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4869 struct nfs4_state *state, long *timeout)
1da177e4 4870{
aa5190d0
TM		 4871 struct nfs_client *clp = server->nfs_client;
4872
4873 if (task->tk_status >= 0)
1da177e4
LT		 4874 return 0;
4875 switch(task->tk_status) {
a1d0b5ee 4876 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4877 case -NFS4ERR_ADMIN_REVOKED:
4878 case -NFS4ERR_BAD_STATEID:
4879 case -NFS4ERR_OPENMODE:
4880 if (state == NULL)
4881 break;
5d422301 4882 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4883 goto recovery_failed;
0400a6b0 4884 goto wait_on_recovery;
0ced63d1 4885 case -NFS4ERR_EXPIRED:
5d422301
TM		 4886 if (state != NULL) {
4887 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4888 goto recovery_failed;
5d422301 4889 }
1da177e4 4890 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4891 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4892 nfs4_schedule_lease_recovery(clp);
4893 goto wait_on_recovery;
519ae255
CL		 4894 case -NFS4ERR_MOVED:
4895 if (nfs4_schedule_migration_recovery(server) < 0)
4896 goto recovery_failed;
4897 goto wait_on_recovery;
8ef2f8d4
CL		 4898 case -NFS4ERR_LEASE_MOVED:
4899 nfs4_schedule_lease_moved_recovery(clp);
4900 goto wait_on_recovery;
4745e315
AA		 4901#if defined(CONFIG_NFS_V4_1)
4902 case -NFS4ERR_BADSESSION:
4903 case -NFS4ERR_BADSLOT:
4904 case -NFS4ERR_BAD_HIGH_SLOT:
4905 case -NFS4ERR_DEADSESSION:
4906 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4907 case -NFS4ERR_SEQ_FALSE_RETRY:
4908 case -NFS4ERR_SEQ_MISORDERED:
4909 dprintk("%s ERROR %d, Reset session\n", __func__,
4910 task->tk_status);
9f594791 4911 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4912 goto wait_on_recovery;
4745e315 4913#endif /* CONFIG_NFS_V4_1 */
1da177e4 4914 case -NFS4ERR_DELAY:
aa5190d0 4915 nfs_inc_server_stats(server, NFSIOS_DELAY);
8478eaa1
N		 4916 rpc_delay(task, nfs4_update_delay(timeout));
4917 goto restart_call;
006ea73e 4918 case -NFS4ERR_GRACE:
1da177e4 4919 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4920 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4921 case -NFS4ERR_OLD_STATEID:
f1478c13 4922 goto restart_call;
1da177e4
LT		 4923 }
4924 task->tk_status = nfs4_map_errors(task->tk_status);
4925 return 0;
9f51a78e 4926recovery_failed:
5d422301
TM		 4927 task->tk_status = -EIO;
4928 return 0;
0400a6b0 4929wait_on_recovery:
a2c0b9e2 4930 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4931 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4932 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4933 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4934 goto recovery_failed;
f1478c13 4935restart_call:
a2c0b9e2
TM		 4936 task->tk_status = 0;
4937 return -EAGAIN;
1da177e4
LT		 4938}
4939
f092075d
CL		 4940static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4941 nfs4_verifier *bootverf)
cd93710e
CL		 4942{
4943 __be32 verf[2];
4944
2c820d9a
CL		 4945 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4946 /* An impossible timestamp guarantees this value
4947 * will never match a generated boot time. */
4948 verf[0] = 0;
17f26b12 4949 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4950 } else {
f092075d 4951 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4952 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4953 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4954 }
cd93710e
CL		 4955 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4956}
4957
e984a55a 4958static unsigned int
ceb3a16c 4959nfs4_init_nonuniform_client_string(struct nfs_client *clp,
e984a55a
CL		 4960 char *buf, size_t len)
4961{
4962 unsigned int result;
4963
ceb3a16c
TM		 4964 if (clp->cl_owner_id != NULL)
4965 return strlcpy(buf, clp->cl_owner_id, len);
4966
e984a55a
CL		 4967 rcu_read_lock();
4968 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4969 clp->cl_ipaddr,
4970 rpc_peeraddr2str(clp->cl_rpcclient,
4971 RPC_DISPLAY_ADDR),
4972 rpc_peeraddr2str(clp->cl_rpcclient,
4973 RPC_DISPLAY_PROTO));
4974 rcu_read_unlock();
ceb3a16c 4975 clp->cl_owner_id = kstrdup(buf, GFP_KERNEL);
e984a55a
CL		 4976 return result;
4977}
4978
4979static unsigned int
ceb3a16c 4980nfs4_init_uniform_client_string(struct nfs_client *clp,
e984a55a
CL		 4981 char *buf, size_t len)
4982{
55b59293 4983 const char *nodename = clp->cl_rpcclient->cl_nodename;
ceb3a16c
TM		 4984 unsigned int result;
4985
4986 if (clp->cl_owner_id != NULL)
4987 return strlcpy(buf, clp->cl_owner_id, len);
6f2ea7f2
CL		 4988
4989 if (nfs4_client_id_uniquifier[0] != '\0')
ceb3a16c 4990 result = scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
55b59293
TM		 4991 clp->rpc_ops->version,
4992 clp->cl_minorversion,
4993 nfs4_client_id_uniquifier,
4994 nodename);
ceb3a16c
TM		 4995 else
4996 result = scnprintf(buf, len, "Linux NFSv%u.%u %s",
e984a55a 4997 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4998 nodename);
ceb3a16c
TM		 4999 clp->cl_owner_id = kstrdup(buf, GFP_KERNEL);
5000 return result;
e984a55a
CL		 5001}
5002
706cb8db
CL		 5003/*
5004 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5005 * services. Advertise one based on the address family of the
5006 * clientaddr.
5007 */
5008static unsigned int
5009nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5010{
5011 if (strchr(clp->cl_ipaddr, ':') != NULL)
5012 return scnprintf(buf, len, "tcp6");
5013 else
5014 return scnprintf(buf, len, "tcp");
5015}
5016
f11b2a1c
JL		 5017static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5018{
5019 struct nfs4_setclientid *sc = calldata;
5020
5021 if (task->tk_status == 0)
5022 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5023}
5024
5025static const struct rpc_call_ops nfs4_setclientid_ops = {
5026 .rpc_call_done = nfs4_setclientid_done,
5027};
5028
6bbb4ae8
CL		 5029/**
5030 * nfs4_proc_setclientid - Negotiate client ID
5031 * @clp: state data structure
5032 * @program: RPC program for NFSv4 callback service
5033 * @port: IP port number for NFS4 callback service
5034 * @cred: RPC credential to use for this call
5035 * @res: where to place the result
5036 *
5037 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5038 */
bb8b27e5
TM		 5039int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5040 unsigned short port, struct rpc_cred *cred,
5041 struct nfs4_setclientid_res *res)
1da177e4
LT		 5042{
5043 nfs4_verifier sc_verifier;
5044 struct nfs4_setclientid setclientid = {
5045 .sc_verifier = &sc_verifier,
5046 .sc_prog = program,
f4eecd5d 5047 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 5048 };
5049 struct rpc_message msg = {
5050 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5051 .rpc_argp = &setclientid,
bb8b27e5 5052 .rpc_resp = res,
286d7d6a 5053 .rpc_cred = cred,
1da177e4 5054 };
f11b2a1c
JL		 5055 struct rpc_task *task;
5056 struct rpc_task_setup task_setup_data = {
5057 .rpc_client = clp->cl_rpcclient,
5058 .rpc_message = &msg,
5059 .callback_ops = &nfs4_setclientid_ops,
5060 .callback_data = &setclientid,
5061 .flags = RPC_TASK_TIMEOUT,
5062 };
6bbb4ae8 5063 int status;
1da177e4 5064
de734831 5065 /* nfs_client_id4 */
f092075d 5066 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 5067 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5068 setclientid.sc_name_len =
5069 nfs4_init_uniform_client_string(clp,
5070 setclientid.sc_name,
5071 sizeof(setclientid.sc_name));
5072 else
5073 setclientid.sc_name_len =
5074 nfs4_init_nonuniform_client_string(clp,
5075 setclientid.sc_name,
5076 sizeof(setclientid.sc_name));
de734831 5077 /* cb_client4 */
706cb8db
CL		 5078 setclientid.sc_netid_len =
5079 nfs4_init_callback_netid(clp,
5080 setclientid.sc_netid,
5081 sizeof(setclientid.sc_netid));
de734831 5082 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5083 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5084 clp->cl_ipaddr, port >> 8, port & 255);
5085
6bbb4ae8
CL		 5086 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
5087 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5088 setclientid.sc_name_len, setclientid.sc_name);
f11b2a1c
JL		 5089 task = rpc_run_task(&task_setup_data);
5090 if (IS_ERR(task)) {
5091 status = PTR_ERR(task);
5092 goto out;
5093 }
5094 status = task->tk_status;
5095 if (setclientid.sc_cred) {
5096 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5097 put_rpccred(setclientid.sc_cred);
5098 }
5099 rpc_put_task(task);
5100out:
c6d01c6f 5101 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5102 dprintk("NFS reply setclientid: %d\n", status);
5103 return status;
1da177e4
LT		 5104}
5105
6bbb4ae8
CL		 5106/**
5107 * nfs4_proc_setclientid_confirm - Confirm client ID
5108 * @clp: state data structure
5109 * @res: result of a previous SETCLIENTID
5110 * @cred: RPC credential to use for this call
5111 *
5112 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5113 */
fd954ae1 5114int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5115 struct nfs4_setclientid_res *arg,
5116 struct rpc_cred *cred)
1da177e4 5117{
1da177e4
LT		 5118 struct rpc_message msg = {
5119 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5120 .rpc_argp = arg,
286d7d6a 5121 .rpc_cred = cred,
1da177e4 5122 };
1da177e4
LT		 5123 int status;
5124
6bbb4ae8
CL		 5125 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5126 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5127 clp->cl_clientid);
1bd714f2 5128 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5129 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5130 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5131 return status;
5132}
5133
fe650407
TM		 5134struct nfs4_delegreturndata {
5135 struct nfs4_delegreturnargs args;
fa178f29 5136 struct nfs4_delegreturnres res;
fe650407
TM		 5137 struct nfs_fh fh;
5138 nfs4_stateid stateid;
26e976a8 5139 unsigned long timestamp;
fa178f29 5140 struct nfs_fattr fattr;
fe650407 5141 int rpc_status;
039b756a
PT		 5142 struct inode *inode;
5143 bool roc;
5144 u32 roc_barrier;
fe650407
TM		 5145};
5146
fe650407
TM		 5147static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5148{
5149 struct nfs4_delegreturndata *data = calldata;
938e1010 5150
14516c3a
TM		 5151 if (!nfs4_sequence_done(task, &data->res.seq_res))
5152 return;
938e1010 5153
ca8acf8d 5154 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5155 switch (task->tk_status) {
79708861 5156 case 0:
fa178f29 5157 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5158 case -NFS4ERR_ADMIN_REVOKED:
5159 case -NFS4ERR_DELEG_REVOKED:
5160 case -NFS4ERR_BAD_STATEID:
5161 case -NFS4ERR_OLD_STATEID:
5162 case -NFS4ERR_STALE_STATEID:
5163 case -NFS4ERR_EXPIRED:
5164 task->tk_status = 0;
039b756a
PT		 5165 if (data->roc)
5166 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5167 break;
79708861 5168 default:
8478eaa1
N		 5169 if (nfs4_async_handle_error(task, data->res.server,
5170 NULL, NULL) == -EAGAIN) {
d00c5d43 5171 rpc_restart_call_prepare(task);
79708861
RL		 5172 return;
5173 }
5174 }
5175 data->rpc_status = task->tk_status;
fe650407
TM		 5176}
5177
5178static void nfs4_delegreturn_release(void *calldata)
5179{
039b756a 5180 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5181 struct inode *inode = data->inode;
039b756a 5182
ea7c38fe
TM		 5183 if (inode) {
5184 if (data->roc)
5185 pnfs_roc_release(inode);
5186 nfs_iput_and_deactive(inode);
5187 }
fe650407
TM		 5188 kfree(calldata);
5189}
5190
938e1010
AA		 5191static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5192{
5193 struct nfs4_delegreturndata *d_data;
5194
5195 d_data = (struct nfs4_delegreturndata *)data;
5196
039b756a
PT		 5197 if (d_data->roc &&
5198 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5199 return;
5200
d9afbd1b
TM		 5201 nfs4_setup_sequence(d_data->res.server,
5202 &d_data->args.seq_args,
5203 &d_data->res.seq_res,
5204 task);
938e1010 5205}
938e1010 5206
c8d149f3 5207static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5208 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5209 .rpc_call_done = nfs4_delegreturn_done,
5210 .rpc_release = nfs4_delegreturn_release,
5211};
5212
e6f81075 5213static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5214{
5215 struct nfs4_delegreturndata *data;
fa178f29 5216 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5217 struct rpc_task *task;
5138fde0
TM		 5218 struct rpc_message msg = {
5219 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5220 .rpc_cred = cred,
5221 };
c970aa85
TM		 5222 struct rpc_task_setup task_setup_data = {
5223 .rpc_client = server->client,
5138fde0 5224 .rpc_message = &msg,
c970aa85
TM		 5225 .callback_ops = &nfs4_delegreturn_ops,
5226 .flags = RPC_TASK_ASYNC,
5227 };
e6f81075 5228 int status = 0;
fe650407 5229
8535b2be 5230 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5231 if (data == NULL)
5232 return -ENOMEM;
a9c92d6b 5233 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5234 data->args.fhandle = &data->fh;
5235 data->args.stateid = &data->stateid;
9e907fec 5236 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5237 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5238 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5239 data->res.fattr = &data->fattr;
5240 data->res.server = server;
5138fde0 5241 nfs_fattr_init(data->res.fattr);
26e976a8 5242 data->timestamp = jiffies;
fe650407 5243 data->rpc_status = 0;
ea7c38fe
TM		 5244 data->inode = nfs_igrab_and_active(inode);
5245 if (data->inode)
5246 data->roc = nfs4_roc(inode);
fe650407 5247
c970aa85 5248 task_setup_data.callback_data = data;
1174dd1f
TM		 5249 msg.rpc_argp = &data->args;
5250 msg.rpc_resp = &data->res;
c970aa85 5251 task = rpc_run_task(&task_setup_data);
7a1218a2 5252 if (IS_ERR(task))
fe650407 5253 return PTR_ERR(task);
e6f81075
TM		 5254 if (!issync)
5255 goto out;
fe650407 5256 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5257 if (status != 0)
5258 goto out;
5259 status = data->rpc_status;
e144cbcc
TM		 5260 if (status == 0)
5261 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5262 else
5263 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5264out:
e6b3c4db 5265 rpc_put_task(task);
fe650407 5266 return status;
1da177e4
LT		 5267}
5268
e6f81075 5269int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5270{
5271 struct nfs_server *server = NFS_SERVER(inode);
5272 struct nfs4_exception exception = { };
5273 int err;
5274 do {
e6f81075 5275 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5276 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5277 switch (err) {
5278 case -NFS4ERR_STALE_STATEID:
5279 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5280 case 0:
5281 return 0;
5282 }
5283 err = nfs4_handle_exception(server, err, &exception);
5284 } while (exception.retry);
5285 return err;
5286}
5287
5288#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5289#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5290
5291/*
5292 * sleep, with exponential backoff, and retry the LOCK operation.
5293 */
5294static unsigned long
5295nfs4_set_lock_task_retry(unsigned long timeout)
5296{
416ad3c9 5297 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5298 timeout <<= 1;
5299 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5300 return NFS4_LOCK_MAXTIMEOUT;
5301 return timeout;
5302}
5303
1da177e4
LT		 5304static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5305{
5306 struct inode *inode = state->inode;
5307 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5308 struct nfs_client *clp = server->nfs_client;
911d1aaf 5309 struct nfs_lockt_args arg = {
1da177e4 5310 .fh = NFS_FH(inode),
911d1aaf 5311 .fl = request,
1da177e4 5312 };
911d1aaf
TM		 5313 struct nfs_lockt_res res = {
5314 .denied = request,
1da177e4
LT		 5315 };
5316 struct rpc_message msg = {
5317 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5318 .rpc_argp = &arg,
5319 .rpc_resp = &res,
5320 .rpc_cred = state->owner->so_cred,
5321 };
1da177e4
LT		 5322 struct nfs4_lock_state *lsp;
5323 int status;
5324
911d1aaf 5325 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5326 status = nfs4_set_lock_state(state, request);
5327 if (status != 0)
5328 goto out;
5329 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5330 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5331 arg.lock_owner.s_dev = server->s_dev;
7c513058 5332 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5333 switch (status) {
5334 case 0:
5335 request->fl_type = F_UNLCK;
5336 break;
5337 case -NFS4ERR_DENIED:
5338 status = 0;
1da177e4 5339 }
70cc6487 5340 request->fl_ops->fl_release_private(request);
a6f951dd 5341 request->fl_ops = NULL;
8d0a8a9d 5342out:
1da177e4
LT		 5343 return status;
5344}
5345
5346static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5347{
5348 struct nfs4_exception exception = { };
5349 int err;
5350
5351 do {
d1b748a5
TM		 5352 err = _nfs4_proc_getlk(state, cmd, request);
5353 trace_nfs4_get_lock(request, state, cmd, err);
5354 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5355 &exception);
5356 } while (exception.retry);
5357 return err;
5358}
5359
5360static int do_vfs_lock(struct file *file, struct file_lock *fl)
5361{
5362 int res = 0;
5363 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5364 case FL_POSIX:
5365 res = posix_lock_file_wait(file, fl);
5366 break;
5367 case FL_FLOCK:
5368 res = flock_lock_file_wait(file, fl);
5369 break;
5370 default:
5371 BUG();
5372 }
1da177e4
LT		 5373 return res;
5374}
5375
faf5f49c 5376struct nfs4_unlockdata {
911d1aaf
TM		 5377 struct nfs_locku_args arg;
5378 struct nfs_locku_res res;
faf5f49c
TM		 5379 struct nfs4_lock_state *lsp;
5380 struct nfs_open_context *ctx;
911d1aaf
TM		 5381 struct file_lock fl;
5382 const struct nfs_server *server;
26e976a8 5383 unsigned long timestamp;
faf5f49c
TM		 5384};
5385
911d1aaf
TM		 5386static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5387 struct nfs_open_context *ctx,
5388 struct nfs4_lock_state *lsp,
5389 struct nfs_seqid *seqid)
5390{
5391 struct nfs4_unlockdata *p;
5392 struct inode *inode = lsp->ls_state->inode;
5393
8535b2be 5394 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5395 if (p == NULL)
5396 return NULL;
5397 p->arg.fh = NFS_FH(inode);
5398 p->arg.fl = &p->fl;
5399 p->arg.seqid = seqid;
c1d51931 5400 p->res.seqid = seqid;
911d1aaf
TM		 5401 p->lsp = lsp;
5402 atomic_inc(&lsp->ls_count);
5403 /* Ensure we don't close file until we're done freeing locks! */
5404 p->ctx = get_nfs_open_context(ctx);
5405 memcpy(&p->fl, fl, sizeof(p->fl));
5406 p->server = NFS_SERVER(inode);
5407 return p;
5408}
5409
06f814a3 5410static void nfs4_locku_release_calldata(void *data)
faf5f49c 5411{
963d8fe5 5412 struct nfs4_unlockdata *calldata = data;
911d1aaf 5413 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5414 nfs4_put_lock_state(calldata->lsp);
5415 put_nfs_open_context(calldata->ctx);
5416 kfree(calldata);
faf5f49c
TM		 5417}
5418
963d8fe5 5419static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5420{
963d8fe5 5421 struct nfs4_unlockdata *calldata = data;
faf5f49c 5422
14516c3a
TM		 5423 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5424 return;
faf5f49c
TM		 5425 switch (task->tk_status) {
5426 case 0:
26e976a8 5427 renew_lease(calldata->server, calldata->timestamp);
c69899a1
TM		 5428 do_vfs_lock(calldata->fl.fl_file, &calldata->fl);
5429 if (nfs4_update_lock_stateid(calldata->lsp,
5430 &calldata->res.stateid))
5431 break;
9e33bed5
TM		 5432 case -NFS4ERR_BAD_STATEID:
5433 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5434 case -NFS4ERR_STALE_STATEID:
5435 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5436 if (!nfs4_stateid_match(&calldata->arg.stateid,
5437 &calldata->lsp->ls_stateid))
5438 rpc_restart_call_prepare(task);
faf5f49c
TM		 5439 break;
5440 default:
8478eaa1
N		 5441 if (nfs4_async_handle_error(task, calldata->server,
5442 NULL, NULL) == -EAGAIN)
d00c5d43 5443 rpc_restart_call_prepare(task);
faf5f49c 5444 }
2b1bc308 5445 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5446}
5447
4ce70ada 5448static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5449{
4ce70ada 5450 struct nfs4_unlockdata *calldata = data;
faf5f49c 5451
911d1aaf 5452 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5453 goto out_wait;
425c1d4e 5454 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5455 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5456 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5457 goto out_no_action;
faf5f49c 5458 }
26e976a8 5459 calldata->timestamp = jiffies;
035168ab 5460 if (nfs4_setup_sequence(calldata->server,
a893693c 5461 &calldata->arg.seq_args,
2240a9e2
TM		 5462 &calldata->res.seq_res,
5463 task) != 0)
5464 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5465 return;
5466out_no_action:
5467 task->tk_action = NULL;
5468out_wait:
5469 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5470}
5471
963d8fe5 5472static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5473 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5474 .rpc_call_done = nfs4_locku_done,
06f814a3 5475 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5476};
5477
a5d16a4d
TM		 5478static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5479 struct nfs_open_context *ctx,
5480 struct nfs4_lock_state *lsp,
5481 struct nfs_seqid *seqid)
5482{
5483 struct nfs4_unlockdata *data;
5138fde0
TM		 5484 struct rpc_message msg = {
5485 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5486 .rpc_cred = ctx->cred,
5487 };
c970aa85
TM		 5488 struct rpc_task_setup task_setup_data = {
5489 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5490 .rpc_message = &msg,
c970aa85 5491 .callback_ops = &nfs4_locku_ops,
101070ca 5492 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5493 .flags = RPC_TASK_ASYNC,
5494 };
a5d16a4d 5495
fa940720
WAA		 5496 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5497 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5498
137d6aca
FF		 5499 /* Ensure this is an unlock - when canceling a lock, the
5500 * canceled lock is passed in, and it won't be an unlock.
5501 */
5502 fl->fl_type = F_UNLCK;
5503
a5d16a4d
TM		 5504 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5505 if (data == NULL) {
5506 nfs_free_seqid(seqid);
5507 return ERR_PTR(-ENOMEM);
5508 }
5509
a9c92d6b 5510 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5511 msg.rpc_argp = &data->arg;
5512 msg.rpc_resp = &data->res;
c970aa85
TM		 5513 task_setup_data.callback_data = data;
5514 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5515}
5516
faf5f49c
TM		 5517static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5518{
65b62a29
TM		 5519 struct inode *inode = state->inode;
5520 struct nfs4_state_owner *sp = state->owner;
5521 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5522 struct nfs_seqid *seqid;
1da177e4 5523 struct nfs4_lock_state *lsp;
06f814a3 5524 struct rpc_task *task;
b4019c0e 5525 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5526 int status = 0;
536ff0f8 5527 unsigned char fl_flags = request->fl_flags;
faf5f49c 5528
8d0a8a9d 5529 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5530 /* Unlock _before_ we do the RPC call */
5531 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5532 /* Exclude nfs_delegation_claim_locks() */
5533 mutex_lock(&sp->so_delegreturn_mutex);
5534 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5535 down_read(&nfsi->rwsem);
5536 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5537 up_read(&nfsi->rwsem);
65b62a29 5538 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5539 goto out;
19e03c57
TM		 5540 }
5541 up_read(&nfsi->rwsem);
65b62a29 5542 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5543 if (status != 0)
9b073574
TM		 5544 goto out;
5545 /* Is this a delegated lock? */
8d0a8a9d 5546 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5547 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5548 goto out;
b4019c0e
TM		 5549 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5550 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5551 status = -ENOMEM;
badc76dd 5552 if (IS_ERR(seqid))
9b073574 5553 goto out;
cd3758e3 5554 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5555 status = PTR_ERR(task);
5556 if (IS_ERR(task))
9b073574 5557 goto out;
a5d16a4d 5558 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5559 rpc_put_task(task);
9b073574 5560out:
536ff0f8 5561 request->fl_flags = fl_flags;
d1b748a5 5562 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5563 return status;
5564}
5565
a5d16a4d
TM		 5566struct nfs4_lockdata {
5567 struct nfs_lock_args arg;
5568 struct nfs_lock_res res;
5569 struct nfs4_lock_state *lsp;
5570 struct nfs_open_context *ctx;
5571 struct file_lock fl;
26e976a8 5572 unsigned long timestamp;
a5d16a4d
TM		 5573 int rpc_status;
5574 int cancelled;
66179efe 5575 struct nfs_server *server;
a5d16a4d
TM		 5576};
5577
5578static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5579 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5580 gfp_t gfp_mask)
1da177e4 5581{
a5d16a4d
TM		 5582 struct nfs4_lockdata *p;
5583 struct inode *inode = lsp->ls_state->inode;
1da177e4 5584 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5585 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5586
8535b2be 5587 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5588 if (p == NULL)
5589 return NULL;
5590
5591 p->arg.fh = NFS_FH(inode);
5592 p->arg.fl = &p->fl;
8535b2be 5593 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5594 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5595 goto out_free;
b4019c0e
TM		 5596 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5597 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5598 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5599 goto out_free_seqid;
7539bbab 5600 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5601 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5602 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5603 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5604 p->lsp = lsp;
66179efe 5605 p->server = server;
a5d16a4d
TM		 5606 atomic_inc(&lsp->ls_count);
5607 p->ctx = get_nfs_open_context(ctx);
5608 memcpy(&p->fl, fl, sizeof(p->fl));
5609 return p;
2f74c0a0
TM		 5610out_free_seqid:
5611 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5612out_free:
5613 kfree(p);
5614 return NULL;
5615}
5616
5617static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5618{
5619 struct nfs4_lockdata *data = calldata;
5620 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5621
3110ff80 5622 dprintk("%s: begin!\n", __func__);
2f74c0a0 5623 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5624 goto out_wait;
a5d16a4d 5625 /* Do we need to do an open_to_lock_owner? */
6b447539 5626 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5627 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5628 goto out_release_lock_seqid;
8fe72bac 5629 }
425c1d4e
TM		 5630 nfs4_stateid_copy(&data->arg.open_stateid,
5631 &state->open_stateid);
a5d16a4d 5632 data->arg.new_lock_owner = 1;
c1d51931 5633 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5634 } else {
2f74c0a0 5635 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5636 nfs4_stateid_copy(&data->arg.lock_stateid,
5637 &data->lsp->ls_stateid);
5638 }
5d422301
TM		 5639 if (!nfs4_valid_open_stateid(state)) {
5640 data->rpc_status = -EBADF;
5641 task->tk_action = NULL;
5642 goto out_release_open_seqid;
5643 }
26e976a8 5644 data->timestamp = jiffies;
035168ab
TM		 5645 if (nfs4_setup_sequence(data->server,
5646 &data->arg.seq_args,
2240a9e2 5647 &data->res.seq_res,
d9afbd1b 5648 task) == 0)
66179efe 5649 return;
5d422301 5650out_release_open_seqid:
2240a9e2
TM		 5651 nfs_release_seqid(data->arg.open_seqid);
5652out_release_lock_seqid:
5653 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5654out_wait:
5655 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5656 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5657}
5658
a5d16a4d
TM		 5659static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5660{
5661 struct nfs4_lockdata *data = calldata;
39071e6f 5662 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5663
3110ff80 5664 dprintk("%s: begin!\n", __func__);
a5d16a4d 5665
14516c3a
TM		 5666 if (!nfs4_sequence_done(task, &data->res.seq_res))
5667 return;
66179efe 5668
a5d16a4d 5669 data->rpc_status = task->tk_status;
425c1d4e
TM		 5670 switch (task->tk_status) {
5671 case 0:
39071e6f
TM		 5672 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode),
5673 data->timestamp);
c69899a1
TM		 5674 if (data->arg.new_lock) {
5675 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
5676 if (do_vfs_lock(data->fl.fl_file, &data->fl) < 0) {
5677 rpc_restart_call_prepare(task);
5678 break;
5679 }
5680 }
39071e6f
TM		 5681 if (data->arg.new_lock_owner != 0) {
5682 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5683 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5684 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5685 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5686 rpc_restart_call_prepare(task);
425c1d4e
TM		 5687 break;
5688 case -NFS4ERR_BAD_STATEID:
5689 case -NFS4ERR_OLD_STATEID:
5690 case -NFS4ERR_STALE_STATEID:
5691 case -NFS4ERR_EXPIRED:
5692 if (data->arg.new_lock_owner != 0) {
5693 if (!nfs4_stateid_match(&data->arg.open_stateid,
5694 &lsp->ls_state->open_stateid))
5695 rpc_restart_call_prepare(task);
5696 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5697 &lsp->ls_stateid))
5698 rpc_restart_call_prepare(task);
a5d16a4d 5699 }
3110ff80 5700 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5701}
5702
5703static void nfs4_lock_release(void *calldata)
5704{
5705 struct nfs4_lockdata *data = calldata;
5706
3110ff80 5707 dprintk("%s: begin!\n", __func__);
2f74c0a0 5708 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5709 if (data->cancelled != 0) {
5710 struct rpc_task *task;
5711 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5712 data->arg.lock_seqid);
5713 if (!IS_ERR(task))
bf294b41 5714 rpc_put_task_async(task);
3110ff80 5715 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5716 } else
5717 nfs_free_seqid(data->arg.lock_seqid);
5718 nfs4_put_lock_state(data->lsp);
5719 put_nfs_open_context(data->ctx);
5720 kfree(data);
3110ff80 5721 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5722}
5723
5724static const struct rpc_call_ops nfs4_lock_ops = {
5725 .rpc_call_prepare = nfs4_lock_prepare,
5726 .rpc_call_done = nfs4_lock_done,
5727 .rpc_release = nfs4_lock_release,
5728};
5729
2bee72a6
TM		 5730static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5731{
2bee72a6
TM		 5732 switch (error) {
5733 case -NFS4ERR_ADMIN_REVOKED:
5734 case -NFS4ERR_BAD_STATEID:
ecac799a 5735 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5736 if (new_lock_owner != 0 ||
795a88c9 5737 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5738 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5739 break;
5740 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5741 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5742 case -NFS4ERR_EXPIRED:
5743 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5744 };
5745}
5746
afe6c27c 5747static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5748{
5749 struct nfs4_lockdata *data;
5750 struct rpc_task *task;
5138fde0
TM		 5751 struct rpc_message msg = {
5752 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5753 .rpc_cred = state->owner->so_cred,
5754 };
c970aa85
TM		 5755 struct rpc_task_setup task_setup_data = {
5756 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5757 .rpc_message = &msg,
c970aa85 5758 .callback_ops = &nfs4_lock_ops,
101070ca 5759 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5760 .flags = RPC_TASK_ASYNC,
5761 };
a5d16a4d
TM		 5762 int ret;
5763
3110ff80 5764 dprintk("%s: begin!\n", __func__);
cd3758e3 5765 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5766 fl->fl_u.nfs4_fl.owner,
5767 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5768 if (data == NULL)
5769 return -ENOMEM;
5770 if (IS_SETLKW(cmd))
5771 data->arg.block = 1;
a9c92d6b 5772 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5773 msg.rpc_argp = &data->arg;
5774 msg.rpc_resp = &data->res;
c970aa85 5775 task_setup_data.callback_data = data;
8fe72bac
TM		 5776 if (recovery_type > NFS_LOCK_NEW) {
5777 if (recovery_type == NFS_LOCK_RECLAIM)
5778 data->arg.reclaim = NFS_LOCK_RECLAIM;
5779 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 5780 } else
5781 data->arg.new_lock = 1;
c970aa85 5782 task = rpc_run_task(&task_setup_data);
7a1218a2 5783 if (IS_ERR(task))
a5d16a4d 5784 return PTR_ERR(task);
a5d16a4d
TM		 5785 ret = nfs4_wait_for_completion_rpc_task(task);
5786 if (ret == 0) {
5787 ret = data->rpc_status;
2bee72a6
TM		 5788 if (ret)
5789 nfs4_handle_setlk_error(data->server, data->lsp,
5790 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5791 } else
5792 data->cancelled = 1;
e6b3c4db 5793 rpc_put_task(task);
3110ff80 5794 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5795 return ret;
1da177e4
LT		 5796}
5797
5798static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5799{
202b50dc 5800 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5801 struct nfs4_exception exception = {
5802 .inode = state->inode,
5803 };
202b50dc
TM		 5804 int err;
5805
5806 do {
42a2d13e
TM		 5807 /* Cache the lock if possible... */
5808 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5809 return 0;
afe6c27c 5810 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5811 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5812 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5813 break;
5814 nfs4_handle_exception(server, err, &exception);
5815 } while (exception.retry);
5816 return err;
1da177e4
LT		 5817}
5818
5819static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5820{
202b50dc 5821 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5822 struct nfs4_exception exception = {
5823 .inode = state->inode,
5824 };
202b50dc
TM		 5825 int err;
5826
6bfc93ef
TM		 5827 err = nfs4_set_lock_state(state, request);
5828 if (err != 0)
5829 return err;
f6de7a39 5830 if (!recover_lost_locks) {
ef1820f9
N		 5831 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5832 return 0;
5833 }
202b50dc 5834 do {
42a2d13e
TM		 5835 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5836 return 0;
afe6c27c 5837 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5838 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5839 switch (err) {
5840 default:
5841 goto out;
5842 case -NFS4ERR_GRACE:
5843 case -NFS4ERR_DELAY:
5844 nfs4_handle_exception(server, err, &exception);
5845 err = 0;
5846 }
202b50dc 5847 } while (exception.retry);
a9ed2e25 5848out:
202b50dc 5849 return err;
1da177e4
LT		 5850}
5851
f062eb6c 5852#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5853/**
5854 * nfs41_check_expired_locks - possibly free a lock stateid
5855 *
5856 * @state: NFSv4 state for an inode
5857 *
5858 * Returns NFS_OK if recovery for this stateid is now finished.
5859 * Otherwise a negative NFS4ERR value is returned.
5860 */
b01dd1d8 5861static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5862{
eb64cf96 5863 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5864 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5865 struct nfs_server *server = NFS_SERVER(state->inode);
5866
b01dd1d8 5867 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5868 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5869 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5870
5871 status = nfs41_test_stateid(server,
5872 &lsp->ls_stateid,
5873 cred);
08cb47fa 5874 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5875 if (status != NFS_OK) {
3e60ffdd
CL		 5876 /* Free the stateid unless the server
5877 * informs us the stateid is unrecognized. */
89af2739
CL		 5878 if (status != -NFS4ERR_BAD_STATEID)
5879 nfs41_free_stateid(server,
ab7cb0df
TM		 5880 &lsp->ls_stateid,
5881 cred);
795a88c9 5882 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5883 ret = status;
5884 }
5885 }
5886 };
5887
5888 return ret;
5889}
5890
5891static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5892{
5893 int status = NFS_OK;
5894
5895 if (test_bit(LK_STATE_IN_USE, &state->flags))
5896 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5897 if (status != NFS_OK)
5898 status = nfs4_lock_expired(state, request);
5899 return status;
f062eb6c
BS		 5900}
5901#endif
5902
1da177e4
LT		 5903static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5904{
19e03c57 5905 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5906 unsigned char fl_flags = request->fl_flags;
8e469ebd 5907 int status = -ENOLCK;
1da177e4 5908
8e469ebd
TM		 5909 if ((fl_flags & FL_POSIX) &&
5910 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5911 goto out;
6bfc93ef 5912 /* Is this a delegated open? */
6bfc93ef
TM		 5913 status = nfs4_set_lock_state(state, request);
5914 if (status != 0)
5915 goto out;
01c3b861
TM		 5916 request->fl_flags |= FL_ACCESS;
5917 status = do_vfs_lock(request->fl_file, request);
5918 if (status < 0)
5919 goto out;
19e03c57 5920 down_read(&nfsi->rwsem);
01c3b861 5921 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5922 /* Yes: cache locks! */
01c3b861 5923 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5924 request->fl_flags = fl_flags & ~FL_SLEEP;
5925 status = do_vfs_lock(request->fl_file, request);
c69899a1 5926 up_read(&nfsi->rwsem);
9a99af49 5927 goto out;
9a99af49 5928 }
19e03c57 5929 up_read(&nfsi->rwsem);
c69899a1 5930 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 5931out:
5932 request->fl_flags = fl_flags;
1da177e4
LT		 5933 return status;
5934}
5935
5936static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5937{
a1d0b5ee
TM		 5938 struct nfs4_exception exception = {
5939 .state = state,
05ffe24f 5940 .inode = state->inode,
a1d0b5ee 5941 };
1da177e4
LT		 5942 int err;
5943
5944 do {
965b5d67 5945 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5946 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5947 if (err == -NFS4ERR_DENIED)
5948 err = -EAGAIN;
1da177e4 5949 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5950 err, &exception);
1da177e4
LT		 5951 } while (exception.retry);
5952 return err;
5953}
5954
5955static int
5956nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5957{
5958 struct nfs_open_context *ctx;
5959 struct nfs4_state *state;
5960 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5961 int status;
5962
5963 /* verify open state */
cd3758e3 5964 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5965 state = ctx->state;
5966
5967 if (request->fl_start < 0 || request->fl_end < 0)
5968 return -EINVAL;
5969
d953126a
TM		 5970 if (IS_GETLK(cmd)) {
5971 if (state != NULL)
5972 return nfs4_proc_getlk(state, F_GETLK, request);
5973 return 0;
5974 }
1da177e4
LT		 5975
5976 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5977 return -EINVAL;
5978
d953126a
TM		 5979 if (request->fl_type == F_UNLCK) {
5980 if (state != NULL)
5981 return nfs4_proc_unlck(state, cmd, request);
5982 return 0;
5983 }
1da177e4 5984
d953126a
TM		 5985 if (state == NULL)
5986 return -ENOLCK;
55725513
TM		 5987 /*
5988 * Don't rely on the VFS having checked the file open mode,
5989 * since it won't do this for flock() locks.
5990 */
f44106e2 5991 switch (request->fl_type) {
55725513
TM		 5992 case F_RDLCK:
5993 if (!(filp->f_mode & FMODE_READ))
5994 return -EBADF;
5995 break;
5996 case F_WRLCK:
5997 if (!(filp->f_mode & FMODE_WRITE))
5998 return -EBADF;
5999 }
6000
1da177e4
LT		 6001 do {
6002 status = nfs4_proc_setlk(state, cmd, request);
6003 if ((status != -EAGAIN) || IS_SETLK(cmd))
6004 break;
6005 timeout = nfs4_set_lock_task_retry(timeout);
6006 status = -ERESTARTSYS;
6007 if (signalled())
6008 break;
6009 } while(status < 0);
1da177e4
LT		 6010 return status;
6011}
6012
db4f2e63 6013int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6014{
6015 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6016 int err;
6017
6018 err = nfs4_set_lock_state(state, fl);
6019 if (err != 0)
db4f2e63 6020 return err;
4a706fa0 6021 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6022 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6023}
6b3b5496 6024
cf470c3e
TM		 6025struct nfs_release_lockowner_data {
6026 struct nfs4_lock_state *lsp;
5ae67c4f 6027 struct nfs_server *server;
cf470c3e 6028 struct nfs_release_lockowner_args args;
b7e63a10 6029 struct nfs_release_lockowner_res res;
60ea6812 6030 unsigned long timestamp;
cf470c3e
TM		 6031};
6032
fbd4bfd1
CL		 6033static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6034{
6035 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6036 struct nfs_server *server = data->server;
cb04ad2a
PT		 6037 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6038 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6039 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6040 data->timestamp = jiffies;
fbd4bfd1
CL		 6041}
6042
6043static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6044{
6045 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6046 struct nfs_server *server = data->server;
6047
b7e63a10 6048 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6049
6050 switch (task->tk_status) {
6051 case 0:
6052 renew_lease(server, data->timestamp);
6053 break;
6054 case -NFS4ERR_STALE_CLIENTID:
6055 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6056 nfs4_schedule_lease_recovery(server->nfs_client);
6057 break;
60ea6812
CL		 6058 case -NFS4ERR_LEASE_MOVED:
6059 case -NFS4ERR_DELAY:
8478eaa1
N		 6060 if (nfs4_async_handle_error(task, server,
6061 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6062 rpc_restart_call_prepare(task);
6063 }
fbd4bfd1
CL		 6064}
6065
d3c7b7cc
TM		 6066static void nfs4_release_lockowner_release(void *calldata)
6067{
cf470c3e 6068 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6069 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6070 kfree(calldata);
6071}
6072
17280175 6073static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6074 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6075 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6076 .rpc_release = nfs4_release_lockowner_release,
6077};
6078
f1cdae87
JL		 6079static void
6080nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6081{
cf470c3e 6082 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6083 struct rpc_message msg = {
6084 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6085 };
6086
6087 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6088 return;
fbd4bfd1 6089
cf470c3e
TM		 6090 data = kmalloc(sizeof(*data), GFP_NOFS);
6091 if (!data)
f1cdae87 6092 return;
cf470c3e 6093 data->lsp = lsp;
5ae67c4f 6094 data->server = server;
cf470c3e
TM		 6095 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6096 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6097 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6098
cf470c3e 6099 msg.rpc_argp = &data->args;
b7e63a10
TM		 6100 msg.rpc_resp = &data->res;
6101 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6102 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6103}
6104
aa1870af
BF		 6105#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6106
64c2ce8b
AK		 6107static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6108 const void *buf, size_t buflen,
6109 int flags, int type)
6b3b5496 6110{
64c2ce8b
AK		 6111 if (strcmp(key, "") != 0)
6112 return -EINVAL;
4b580ee3 6113
64c2ce8b 6114 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6115}
6116
64c2ce8b
AK		 6117static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6118 void *buf, size_t buflen, int type)
6b3b5496 6119{
64c2ce8b
AK		 6120 if (strcmp(key, "") != 0)
6121 return -EINVAL;
aa1870af 6122
64c2ce8b 6123 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6124}
6125
64c2ce8b
AK		 6126static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6127 size_t list_len, const char *name,
6128 size_t name_len, int type)
6b3b5496 6129{
64c2ce8b 6130 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6131
096455a2
BF		 6132 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
6133 return 0;
64c2ce8b
AK		 6134
6135 if (list && len <= list_len)
6136 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6137 return len;
6b3b5496
BF		 6138}
6139
c9bccef6
DQ		 6140#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6141static inline int nfs4_server_supports_labels(struct nfs_server *server)
6142{
6143 return server->caps & NFS_CAP_SECURITY_LABEL;
6144}
6145
6146static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6147 const void *buf, size_t buflen,
6148 int flags, int type)
6149{
6150 if (security_ismaclabel(key))
6151 return nfs4_set_security_label(dentry, buf, buflen);
6152
6153 return -EOPNOTSUPP;
6154}
6155
6156static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6157 void *buf, size_t buflen, int type)
6158{
6159 if (security_ismaclabel(key))
6160 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
6161 return -EOPNOTSUPP;
6162}
6163
6164static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6165 size_t list_len, const char *name,
6166 size_t name_len, int type)
6167{
6168 size_t len = 0;
6169
6170 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
6171 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
6172 if (list && len <= list_len)
6173 security_inode_listsecurity(dentry->d_inode, list, len);
6174 }
6175 return len;
6176}
6177
6178static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6179 .prefix = XATTR_SECURITY_PREFIX,
6180 .list = nfs4_xattr_list_nfs4_label,
6181 .get = nfs4_xattr_get_nfs4_label,
6182 .set = nfs4_xattr_set_nfs4_label,
6183};
6184#endif
6185
6186
533eb461
AA		 6187/*
6188 * nfs_fhget will use either the mounted_on_fileid or the fileid
6189 */
69aaaae1
TM		 6190static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6191{
533eb461
AA		 6192 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6193 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6194 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6195 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6196 return;
6197
6198 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6199 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6200 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6201 fattr->nlink = 2;
6202}
6203
f05d147f
BS		 6204static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6205 const struct qstr *name,
6206 struct nfs4_fs_locations *fs_locations,
6207 struct page *page)
683b57b4
TM		 6208{
6209 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6210 u32 bitmask[3] = {
361e624f 6211 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6212 };
6213 struct nfs4_fs_locations_arg args = {
6214 .dir_fh = NFS_FH(dir),
c228fd3a 6215 .name = name,
683b57b4
TM		 6216 .page = page,
6217 .bitmask = bitmask,
6218 };
22958463
BH		 6219 struct nfs4_fs_locations_res res = {
6220 .fs_locations = fs_locations,
6221 };
683b57b4
TM		 6222 struct rpc_message msg = {
6223 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6224 .rpc_argp = &args,
22958463 6225 .rpc_resp = &res,
683b57b4
TM		 6226 };
6227 int status;
6228
3110ff80 6229 dprintk("%s: start\n", __func__);
533eb461
AA		 6230
6231 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6232 * is not supported */
6233 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6234 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6235 else
6236 bitmask[0] |= FATTR4_WORD0_FILEID;
6237
c228fd3a 6238 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6239 fs_locations->server = server;
830b8e33 6240 fs_locations->nlocations = 0;
f05d147f 6241 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6242 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6243 return status;
6244}
6245
f05d147f
BS		 6246int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6247 const struct qstr *name,
6248 struct nfs4_fs_locations *fs_locations,
6249 struct page *page)
db0a9593
BS		 6250{
6251 struct nfs4_exception exception = { };
6252 int err;
6253 do {
078ea3df
TM		 6254 err = _nfs4_proc_fs_locations(client, dir, name,
6255 fs_locations, page);
6256 trace_nfs4_get_fs_locations(dir, name, err);
6257 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6258 &exception);
6259 } while (exception.retry);
6260 return err;
6261}
6262
b03d735b
CL		 6263/*
6264 * This operation also signals the server that this client is
6265 * performing migration recovery. The server can stop returning
6266 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6267 * appended to this compound to identify the client ID which is
6268 * performing recovery.
6269 */
6270static int _nfs40_proc_get_locations(struct inode *inode,
6271 struct nfs4_fs_locations *locations,
6272 struct page *page, struct rpc_cred *cred)
6273{
6274 struct nfs_server *server = NFS_SERVER(inode);
6275 struct rpc_clnt *clnt = server->client;
6276 u32 bitmask[2] = {
6277 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6278 };
6279 struct nfs4_fs_locations_arg args = {
6280 .clientid = server->nfs_client->cl_clientid,
6281 .fh = NFS_FH(inode),
6282 .page = page,
6283 .bitmask = bitmask,
6284 .migration = 1, /* skip LOOKUP */
6285 .renew = 1, /* append RENEW */
6286 };
6287 struct nfs4_fs_locations_res res = {
6288 .fs_locations = locations,
6289 .migration = 1,
6290 .renew = 1,
6291 };
6292 struct rpc_message msg = {
6293 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6294 .rpc_argp = &args,
6295 .rpc_resp = &res,
6296 .rpc_cred = cred,
6297 };
6298 unsigned long now = jiffies;
6299 int status;
6300
6301 nfs_fattr_init(&locations->fattr);
6302 locations->server = server;
6303 locations->nlocations = 0;
6304
6305 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6306 nfs4_set_sequence_privileged(&args.seq_args);
6307 status = nfs4_call_sync_sequence(clnt, server, &msg,
6308 &args.seq_args, &res.seq_res);
6309 if (status)
6310 return status;
6311
6312 renew_lease(server, now);
6313 return 0;
6314}
6315
6316#ifdef CONFIG_NFS_V4_1
6317
6318/*
6319 * This operation also signals the server that this client is
6320 * performing migration recovery. The server can stop asserting
6321 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6322 * performing this operation is identified in the SEQUENCE
6323 * operation in this compound.
6324 *
6325 * When the client supports GETATTR(fs_locations_info), it can
6326 * be plumbed in here.
6327 */
6328static int _nfs41_proc_get_locations(struct inode *inode,
6329 struct nfs4_fs_locations *locations,
6330 struct page *page, struct rpc_cred *cred)
6331{
6332 struct nfs_server *server = NFS_SERVER(inode);
6333 struct rpc_clnt *clnt = server->client;
6334 u32 bitmask[2] = {
6335 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6336 };
6337 struct nfs4_fs_locations_arg args = {
6338 .fh = NFS_FH(inode),
6339 .page = page,
6340 .bitmask = bitmask,
6341 .migration = 1, /* skip LOOKUP */
6342 };
6343 struct nfs4_fs_locations_res res = {
6344 .fs_locations = locations,
6345 .migration = 1,
6346 };
6347 struct rpc_message msg = {
6348 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6349 .rpc_argp = &args,
6350 .rpc_resp = &res,
6351 .rpc_cred = cred,
6352 };
6353 int status;
6354
6355 nfs_fattr_init(&locations->fattr);
6356 locations->server = server;
6357 locations->nlocations = 0;
6358
6359 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6360 nfs4_set_sequence_privileged(&args.seq_args);
6361 status = nfs4_call_sync_sequence(clnt, server, &msg,
6362 &args.seq_args, &res.seq_res);
6363 if (status == NFS4_OK &&
6364 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6365 status = -NFS4ERR_LEASE_MOVED;
6366 return status;
6367}
6368
6369#endif /* CONFIG_NFS_V4_1 */
6370
6371/**
6372 * nfs4_proc_get_locations - discover locations for a migrated FSID
6373 * @inode: inode on FSID that is migrating
6374 * @locations: result of query
6375 * @page: buffer
6376 * @cred: credential to use for this operation
6377 *
6378 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6379 * operation failed, or a negative errno if a local error occurred.
6380 *
6381 * On success, "locations" is filled in, but if the server has
6382 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6383 * asserted.
6384 *
6385 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6386 * from this client that require migration recovery.
6387 */
6388int nfs4_proc_get_locations(struct inode *inode,
6389 struct nfs4_fs_locations *locations,
6390 struct page *page, struct rpc_cred *cred)
6391{
6392 struct nfs_server *server = NFS_SERVER(inode);
6393 struct nfs_client *clp = server->nfs_client;
6394 const struct nfs4_mig_recovery_ops *ops =
6395 clp->cl_mvops->mig_recovery_ops;
6396 struct nfs4_exception exception = { };
6397 int status;
6398
6399 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6400 (unsigned long long)server->fsid.major,
6401 (unsigned long long)server->fsid.minor,
6402 clp->cl_hostname);
6403 nfs_display_fhandle(NFS_FH(inode), __func__);
6404
6405 do {
6406 status = ops->get_locations(inode, locations, page, cred);
6407 if (status != -NFS4ERR_DELAY)
6408 break;
6409 nfs4_handle_exception(server, status, &exception);
6410 } while (exception.retry);
6411 return status;
6412}
6413
44c99933
CL		 6414/*
6415 * This operation also signals the server that this client is
6416 * performing "lease moved" recovery. The server can stop
6417 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6418 * is appended to this compound to identify the client ID which is
6419 * performing recovery.
6420 */
6421static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6422{
6423 struct nfs_server *server = NFS_SERVER(inode);
6424 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6425 struct rpc_clnt *clnt = server->client;
6426 struct nfs4_fsid_present_arg args = {
6427 .fh = NFS_FH(inode),
6428 .clientid = clp->cl_clientid,
6429 .renew = 1, /* append RENEW */
6430 };
6431 struct nfs4_fsid_present_res res = {
6432 .renew = 1,
6433 };
6434 struct rpc_message msg = {
6435 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6436 .rpc_argp = &args,
6437 .rpc_resp = &res,
6438 .rpc_cred = cred,
6439 };
6440 unsigned long now = jiffies;
6441 int status;
6442
6443 res.fh = nfs_alloc_fhandle();
6444 if (res.fh == NULL)
6445 return -ENOMEM;
6446
6447 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6448 nfs4_set_sequence_privileged(&args.seq_args);
6449 status = nfs4_call_sync_sequence(clnt, server, &msg,
6450 &args.seq_args, &res.seq_res);
6451 nfs_free_fhandle(res.fh);
6452 if (status)
6453 return status;
6454
6455 do_renew_lease(clp, now);
6456 return 0;
6457}
6458
6459#ifdef CONFIG_NFS_V4_1
6460
6461/*
6462 * This operation also signals the server that this client is
6463 * performing "lease moved" recovery. The server can stop asserting
6464 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6465 * this operation is identified in the SEQUENCE operation in this
6466 * compound.
6467 */
6468static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6469{
6470 struct nfs_server *server = NFS_SERVER(inode);
6471 struct rpc_clnt *clnt = server->client;
6472 struct nfs4_fsid_present_arg args = {
6473 .fh = NFS_FH(inode),
6474 };
6475 struct nfs4_fsid_present_res res = {
6476 };
6477 struct rpc_message msg = {
6478 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6479 .rpc_argp = &args,
6480 .rpc_resp = &res,
6481 .rpc_cred = cred,
6482 };
6483 int status;
6484
6485 res.fh = nfs_alloc_fhandle();
6486 if (res.fh == NULL)
6487 return -ENOMEM;
6488
6489 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6490 nfs4_set_sequence_privileged(&args.seq_args);
6491 status = nfs4_call_sync_sequence(clnt, server, &msg,
6492 &args.seq_args, &res.seq_res);
6493 nfs_free_fhandle(res.fh);
6494 if (status == NFS4_OK &&
6495 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6496 status = -NFS4ERR_LEASE_MOVED;
6497 return status;
6498}
6499
6500#endif /* CONFIG_NFS_V4_1 */
6501
6502/**
6503 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6504 * @inode: inode on FSID to check
6505 * @cred: credential to use for this operation
6506 *
6507 * Server indicates whether the FSID is present, moved, or not
6508 * recognized. This operation is necessary to clear a LEASE_MOVED
6509 * condition for this client ID.
6510 *
6511 * Returns NFS4_OK if the FSID is present on this server,
6512 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6513 * NFS4ERR code if some error occurred on the server, or a
6514 * negative errno if a local failure occurred.
6515 */
6516int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6517{
6518 struct nfs_server *server = NFS_SERVER(inode);
6519 struct nfs_client *clp = server->nfs_client;
6520 const struct nfs4_mig_recovery_ops *ops =
6521 clp->cl_mvops->mig_recovery_ops;
6522 struct nfs4_exception exception = { };
6523 int status;
6524
6525 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6526 (unsigned long long)server->fsid.major,
6527 (unsigned long long)server->fsid.minor,
6528 clp->cl_hostname);
6529 nfs_display_fhandle(NFS_FH(inode), __func__);
6530
6531 do {
6532 status = ops->fsid_present(inode, cred);
6533 if (status != -NFS4ERR_DELAY)
6534 break;
6535 nfs4_handle_exception(server, status, &exception);
6536 } while (exception.retry);
6537 return status;
6538}
6539
5ec16a85 6540/**
a5250def
WAA		 6541 * If 'use_integrity' is true and the state managment nfs_client
6542 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6543 * and the machine credential as per RFC3530bis and RFC5661 Security
6544 * Considerations sections. Otherwise, just use the user cred with the
6545 * filesystem's rpc_client.
5ec16a85 6546 */
a5250def 6547static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6548{
6549 int status;
6550 struct nfs4_secinfo_arg args = {
6551 .dir_fh = NFS_FH(dir),
6552 .name = name,
6553 };
6554 struct nfs4_secinfo_res res = {
6555 .flavors = flavors,
6556 };
6557 struct rpc_message msg = {
6558 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6559 .rpc_argp = &args,
6560 .rpc_resp = &res,
6561 };
a5250def 6562 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6563 struct rpc_cred *cred = NULL;
a5250def
WAA		 6564
6565 if (use_integrity) {
6566 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6567 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6568 msg.rpc_cred = cred;
a5250def 6569 }
5a5ea0d4
BS		 6570
6571 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6572
6573 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6574 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6575
a5250def
WAA		 6576 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6577 &res.seq_res, 0);
5a5ea0d4 6578 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6579
7cb852df
WAA		 6580 if (cred)
6581 put_rpccred(cred);
a5250def 6582
5a5ea0d4
BS		 6583 return status;
6584}
6585
72de53ec
BS		 6586int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6587 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6588{
6589 struct nfs4_exception exception = { };
6590 int err;
6591 do {
a5250def
WAA		 6592 err = -NFS4ERR_WRONGSEC;
6593
6594 /* try to use integrity protection with machine cred */
6595 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6596 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6597
6598 /*
6599 * if unable to use integrity protection, or SECINFO with
6600 * integrity protection returns NFS4ERR_WRONGSEC (which is
6601 * disallowed by spec, but exists in deployed servers) use
6602 * the current filesystem's rpc_client and the user cred.
6603 */
6604 if (err == -NFS4ERR_WRONGSEC)
6605 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6606
078ea3df
TM		 6607 trace_nfs4_secinfo(dir, name, err);
6608 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6609 &exception);
6610 } while (exception.retry);
6611 return err;
6612}
6613
557134a3 6614#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6615/*
6616 * Check the exchange flags returned by the server for invalid flags, having
6617 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6618 * DS flags set.
6619 */
6620static int nfs4_check_cl_exchange_flags(u32 flags)
6621{
6622 if (flags & ~EXCHGID4_FLAG_MASK_R)
6623 goto out_inval;
6624 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6625 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6626 goto out_inval;
6627 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6628 goto out_inval;
6629 return NFS_OK;
6630out_inval:
6631 return -NFS4ERR_INVAL;
6632}
6633
78fe0f41 6634static bool
79d4e1f0
CL		 6635nfs41_same_server_scope(struct nfs41_server_scope *a,
6636 struct nfs41_server_scope *b)
78fe0f41
WAA		 6637{
6638 if (a->server_scope_sz == b->server_scope_sz &&
6639 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6640 return true;
6641
6642 return false;
6643}
6644
7c44f1ae
WAA		 6645/*
6646 * nfs4_proc_bind_conn_to_session()
6647 *
6648 * The 4.1 client currently uses the same TCP connection for the
6649 * fore and backchannel.
6650 */
2cf047c9 6651int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6652{
6653 int status;
71a097c6
TM		 6654 struct nfs41_bind_conn_to_session_args args = {
6655 .client = clp,
6656 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6657 };
7c44f1ae
WAA		 6658 struct nfs41_bind_conn_to_session_res res;
6659 struct rpc_message msg = {
6660 .rpc_proc =
6661 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 6662 .rpc_argp = &args,
7c44f1ae 6663 .rpc_resp = &res,
2cf047c9 6664 .rpc_cred = cred,
7c44f1ae
WAA		 6665 };
6666
6667 dprintk("--> %s\n", __func__);
7c44f1ae 6668
71a097c6
TM		 6669 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6670 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6671 args.dir = NFS4_CDFC4_FORE;
7c44f1ae
WAA		 6672
6673 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6674 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 6675 if (status == 0) {
71a097c6 6676 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 6677 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6678 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6679 status = -EIO;
71a097c6 6680 goto out;
7c44f1ae 6681 }
71a097c6 6682 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 6683 dprintk("NFS: %s: Unexpected direction from server\n",
6684 __func__);
6685 status = -EIO;
71a097c6 6686 goto out;
7c44f1ae 6687 }
71a097c6 6688 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 6689 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6690 __func__);
6691 status = -EIO;
71a097c6 6692 goto out;
7c44f1ae
WAA		 6693 }
6694 }
7c44f1ae
WAA		 6695out:
6696 dprintk("<-- %s status= %d\n", __func__, status);
6697 return status;
6698}
6699
99fe60d0 6700/*
fa940720
WAA		 6701 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6702 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6703 */
6704static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6705 .how = SP4_MACH_CRED,
6706 .enforce.u.words = {
6707 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6708 1 << (OP_EXCHANGE_ID - 32) |
6709 1 << (OP_CREATE_SESSION - 32) |
6710 1 << (OP_DESTROY_SESSION - 32) |
6711 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6712 },
6713 .allow.u.words = {
6714 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6715 1 << (OP_LOCKU) |
6716 1 << (OP_COMMIT),
8b5bee2e 6717 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6718 1 << (OP_SECINFO_NO_NAME - 32) |
6719 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6720 1 << (OP_FREE_STATEID - 32) |
6721 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6722 }
6723};
6724
6725/*
6726 * Select the state protection mode for client `clp' given the server results
6727 * from exchange_id in `sp'.
99fe60d0 6728 *
2031cd1a
WAA		 6729 * Returns 0 on success, negative errno otherwise.
6730 */
6731static int nfs4_sp4_select_mode(struct nfs_client *clp,
6732 struct nfs41_state_protection *sp)
6733{
6734 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6735 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6736 1 << (OP_EXCHANGE_ID - 32) |
6737 1 << (OP_CREATE_SESSION - 32) |
6738 1 << (OP_DESTROY_SESSION - 32) |
6739 1 << (OP_DESTROY_CLIENTID - 32)
6740 };
6741 unsigned int i;
6742
6743 if (sp->how == SP4_MACH_CRED) {
6744 /* Print state protect result */
6745 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6746 for (i = 0; i <= LAST_NFS4_OP; i++) {
6747 if (test_bit(i, sp->enforce.u.longs))
6748 dfprintk(MOUNT, " enforce op %d\n", i);
6749 if (test_bit(i, sp->allow.u.longs))
6750 dfprintk(MOUNT, " allow op %d\n", i);
6751 }
6752
6753 /* make sure nothing is on enforce list that isn't supported */
6754 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6755 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6756 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6757 return -EINVAL;
6758 }
6759 }
6760
6761 /*
6762 * Minimal mode - state operations are allowed to use machine
6763 * credential. Note this already happens by default, so the
6764 * client doesn't have to do anything more than the negotiation.
6765 *
6766 * NOTE: we don't care if EXCHANGE_ID is in the list -
6767 * we're already using the machine cred for exchange_id
6768 * and will never use a different cred.
6769 */
6770 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6771 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6772 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6773 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6774 dfprintk(MOUNT, "sp4_mach_cred:\n");
6775 dfprintk(MOUNT, " minimal mode enabled\n");
6776 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6777 } else {
6778 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6779 return -EINVAL;
6780 }
fa940720
WAA		 6781
6782 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6783 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6784 dfprintk(MOUNT, " cleanup mode enabled\n");
6785 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6786 }
8b5bee2e
WAA		 6787
6788 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6789 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6790 dfprintk(MOUNT, " secinfo mode enabled\n");
6791 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6792 }
3787d506
WAA		 6793
6794 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6795 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6796 dfprintk(MOUNT, " stateid mode enabled\n");
6797 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6798 }
8c21c62c
WAA		 6799
6800 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6801 dfprintk(MOUNT, " write mode enabled\n");
6802 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6803 }
6804
6805 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6806 dfprintk(MOUNT, " commit mode enabled\n");
6807 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6808 }
2031cd1a
WAA		 6809 }
6810
6811 return 0;
6812}
6813
6814/*
6815 * _nfs4_proc_exchange_id()
6bbb4ae8 6816 *
2031cd1a 6817 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6818 */
2031cd1a
WAA		 6819static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6820 u32 sp4_how)
99fe60d0
BH		 6821{
6822 nfs4_verifier verifier;
6823 struct nfs41_exchange_id_args args = {
cd93710e 6824 .verifier = &verifier,
99fe60d0 6825 .client = clp,
cd3fadec 6826#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6827 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6828 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6829 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6830#else
6831 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6832 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6833#endif
99fe60d0
BH		 6834 };
6835 struct nfs41_exchange_id_res res = {
32b01310 6836 0
99fe60d0
BH		 6837 };
6838 int status;
6839 struct rpc_message msg = {
6840 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6841 .rpc_argp = &args,
6842 .rpc_resp = &res,
6843 .rpc_cred = cred,
6844 };
99fe60d0 6845
f092075d 6846 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6847 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6848 sizeof(args.id));
6bbb4ae8
CL		 6849 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6850 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6851 args.id_len, args.id);
99fe60d0 6852
acdeb69d 6853 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6854 GFP_NOFS);
acdeb69d 6855 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6856 status = -ENOMEM;
6857 goto out;
6858 }
78fe0f41 6859
79d4e1f0 6860 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6861 GFP_NOFS);
177313f1 6862 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6863 status = -ENOMEM;
acdeb69d 6864 goto out_server_owner;
abe9a6d5 6865 }
78fe0f41 6866
bbafffd2 6867 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6868 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6869 status = -ENOMEM;
6870 goto out_server_scope;
6871 }
6872
2031cd1a
WAA		 6873 switch (sp4_how) {
6874 case SP4_NONE:
6875 args.state_protect.how = SP4_NONE;
6876 break;
6877
6878 case SP4_MACH_CRED:
6879 args.state_protect = nfs4_sp4_mach_cred_request;
6880 break;
6881
6882 default:
6883 /* unsupported! */
6884 WARN_ON_ONCE(1);
6885 status = -EINVAL;
6886 goto out_server_scope;
6887 }
6888
1bd714f2 6889 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6890 trace_nfs4_exchange_id(clp, status);
177313f1 6891 if (status == 0)
32b01310 6892 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6893
2031cd1a
WAA		 6894 if (status == 0)
6895 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6896
acdeb69d 6897 if (status == 0) {
32b01310
TM		 6898 clp->cl_clientid = res.clientid;
6899 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6900 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6901 clp->cl_seqid = res.seqid;
6902
acdeb69d
CL		 6903 kfree(clp->cl_serverowner);
6904 clp->cl_serverowner = res.server_owner;
6905 res.server_owner = NULL;
78fe0f41 6906
7d2ed9ac 6907 /* use the most recent implementation id */
59155546
CL		 6908 kfree(clp->cl_implid);
6909 clp->cl_implid = res.impl_id;
7d2ed9ac 6910
177313f1 6911 if (clp->cl_serverscope != NULL &&
79d4e1f0 6912 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6913 res.server_scope)) {
6914 dprintk("%s: server_scope mismatch detected\n",
6915 __func__);
6916 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6917 kfree(clp->cl_serverscope);
6918 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6919 }
6920
177313f1 6921 if (clp->cl_serverscope == NULL) {
79d4e1f0 6922 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6923 goto out;
6924 }
32b01310
TM		 6925 } else
6926 kfree(res.impl_id);
7d2ed9ac 6927
acdeb69d
CL		 6928out_server_owner:
6929 kfree(res.server_owner);
7d2ed9ac 6930out_server_scope:
abe9a6d5
WAA		 6931 kfree(res.server_scope);
6932out:
177313f1 6933 if (clp->cl_implid != NULL)
6bbb4ae8 6934 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6935 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6936 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6937 clp->cl_implid->date.seconds,
6938 clp->cl_implid->date.nseconds);
6bbb4ae8 6939 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6940 return status;
6941}
6942
2031cd1a
WAA		 6943/*
6944 * nfs4_proc_exchange_id()
6945 *
6946 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6947 *
6948 * Since the clientid has expired, all compounds using sessions
6949 * associated with the stale clientid will be returning
6950 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6951 * be in some phase of session reset.
6952 *
6953 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6954 */
6955int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6956{
6957 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6958 int status;
6959
6960 /* try SP4_MACH_CRED if krb5i/p */
6961 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6962 authflavor == RPC_AUTH_GSS_KRB5P) {
6963 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6964 if (!status)
6965 return 0;
6966 }
6967
6968 /* try SP4_NONE */
6969 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6970}
6971
66245539
TM		 6972static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6973 struct rpc_cred *cred)
6974{
6975 struct rpc_message msg = {
6976 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6977 .rpc_argp = clp,
6978 .rpc_cred = cred,
6979 };
6980 int status;
6981
6982 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6983 trace_nfs4_destroy_clientid(clp, status);
66245539 6984 if (status)
02c67525 6985 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6986 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6987 return status;
6988}
6989
6990static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6991 struct rpc_cred *cred)
6992{
6993 unsigned int loop;
6994 int ret;
6995
6996 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6997 ret = _nfs4_proc_destroy_clientid(clp, cred);
6998 switch (ret) {
6999 case -NFS4ERR_DELAY:
7000 case -NFS4ERR_CLIENTID_BUSY:
7001 ssleep(1);
7002 break;
7003 default:
7004 return ret;
7005 }
7006 }
7007 return 0;
7008}
7009
7010int nfs4_destroy_clientid(struct nfs_client *clp)
7011{
7012 struct rpc_cred *cred;
7013 int ret = 0;
7014
7015 if (clp->cl_mvops->minor_version < 1)
7016 goto out;
7017 if (clp->cl_exchange_flags == 0)
7018 goto out;
05f4c350
CL		 7019 if (clp->cl_preserve_clid)
7020 goto out;
73d8bde5 7021 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7022 ret = nfs4_proc_destroy_clientid(clp, cred);
7023 if (cred)
7024 put_rpccred(cred);
7025 switch (ret) {
7026 case 0:
7027 case -NFS4ERR_STALE_CLIENTID:
7028 clp->cl_exchange_flags = 0;
7029 }
7030out:
7031 return ret;
7032}
7033
2050f0cc
AA		 7034struct nfs4_get_lease_time_data {
7035 struct nfs4_get_lease_time_args *args;
7036 struct nfs4_get_lease_time_res *res;
7037 struct nfs_client *clp;
7038};
7039
7040static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7041 void *calldata)
7042{
2050f0cc
AA		 7043 struct nfs4_get_lease_time_data *data =
7044 (struct nfs4_get_lease_time_data *)calldata;
7045
7046 dprintk("--> %s\n", __func__);
7047 /* just setup sequence, do not trigger session recovery
7048 since we're invoked within one */
d9afbd1b
TM		 7049 nfs41_setup_sequence(data->clp->cl_session,
7050 &data->args->la_seq_args,
7051 &data->res->lr_seq_res,
7052 task);
2050f0cc
AA		 7053 dprintk("<-- %s\n", __func__);
7054}
7055
7056/*
7057 * Called from nfs4_state_manager thread for session setup, so don't recover
7058 * from sequence operation or clientid errors.
7059 */
7060static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7061{
7062 struct nfs4_get_lease_time_data *data =
7063 (struct nfs4_get_lease_time_data *)calldata;
7064
7065 dprintk("--> %s\n", __func__);
14516c3a
TM		 7066 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7067 return;
2050f0cc
AA		 7068 switch (task->tk_status) {
7069 case -NFS4ERR_DELAY:
7070 case -NFS4ERR_GRACE:
7071 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7072 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7073 task->tk_status = 0;
a8a4ae3a
AA		 7074 /* fall through */
7075 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7076 rpc_restart_call_prepare(task);
2050f0cc
AA		 7077 return;
7078 }
2050f0cc
AA		 7079 dprintk("<-- %s\n", __func__);
7080}
7081
17280175 7082static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7083 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7084 .rpc_call_done = nfs4_get_lease_time_done,
7085};
7086
7087int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7088{
7089 struct rpc_task *task;
7090 struct nfs4_get_lease_time_args args;
7091 struct nfs4_get_lease_time_res res = {
7092 .lr_fsinfo = fsinfo,
7093 };
7094 struct nfs4_get_lease_time_data data = {
7095 .args = &args,
7096 .res = &res,
7097 .clp = clp,
7098 };
7099 struct rpc_message msg = {
7100 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7101 .rpc_argp = &args,
7102 .rpc_resp = &res,
7103 };
7104 struct rpc_task_setup task_setup = {
7105 .rpc_client = clp->cl_rpcclient,
7106 .rpc_message = &msg,
7107 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7108 .callback_data = &data,
7109 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7110 };
7111 int status;
7112
a9c92d6b 7113 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7114 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7115 dprintk("--> %s\n", __func__);
7116 task = rpc_run_task(&task_setup);
7117
7118 if (IS_ERR(task))
7119 status = PTR_ERR(task);
7120 else {
7121 status = task->tk_status;
7122 rpc_put_task(task);
7123 }
7124 dprintk("<-- %s return %d\n", __func__, status);
7125
7126 return status;
7127}
7128
fc931582
AA		 7129/*
7130 * Initialize the values to be used by the client in CREATE_SESSION
7131 * If nfs4_init_session set the fore channel request and response sizes,
7132 * use them.
7133 *
7134 * Set the back channel max_resp_sz_cached to zero to force the client to
7135 * always set csa_cachethis to FALSE because the current implementation
7136 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7137 */
7138static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7139{
18aad3d5
AA		 7140 unsigned int max_rqst_sz, max_resp_sz;
7141
7142 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7143 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7144
fc931582 7145 /* Fore channel attributes */
18aad3d5
AA		 7146 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7147 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7148 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7149 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7150
7151 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7152 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7153 __func__,
7154 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7155 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7156
7157 /* Back channel attributes */
fc931582
AA		 7158 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7159 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7160 args->bc_attrs.max_resp_sz_cached = 0;
7161 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7162 args->bc_attrs.max_reqs = 1;
7163
7164 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7165 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7166 __func__,
7167 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7168 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7169 args->bc_attrs.max_reqs);
7170}
7171
79969dd1
TM		 7172static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7173 struct nfs41_create_session_res *res)
8d35301d 7174{
43c2e885 7175 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7176 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7177
43c2e885
BF		 7178 if (rcvd->max_resp_sz > sent->max_resp_sz)
7179 return -EINVAL;
7180 /*
7181 * Our requested max_ops is the minimum we need; we're not
7182 * prepared to break up compounds into smaller pieces than that.
7183 * So, no point even trying to continue if the server won't
7184 * cooperate:
7185 */
7186 if (rcvd->max_ops < sent->max_ops)
7187 return -EINVAL;
7188 if (rcvd->max_reqs == 0)
7189 return -EINVAL;
b4b9a0c1
VG		 7190 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7191 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7192 return 0;
8d35301d
AA		 7193}
7194
79969dd1
TM		 7195static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7196 struct nfs41_create_session_res *res)
43c2e885
BF		 7197{
7198 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7199 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7200
b1c0df5f
TM		 7201 if (!(res->flags & SESSION4_BACK_CHAN))
7202 goto out;
43c2e885
BF		 7203 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7204 return -EINVAL;
7205 if (rcvd->max_resp_sz < sent->max_resp_sz)
7206 return -EINVAL;
7207 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7208 return -EINVAL;
7209 /* These would render the backchannel useless: */
b4b9a0c1 7210 if (rcvd->max_ops != sent->max_ops)
43c2e885 7211 return -EINVAL;
b4b9a0c1 7212 if (rcvd->max_reqs != sent->max_reqs)
43c2e885 7213 return -EINVAL;
b1c0df5f 7214out:
43c2e885
BF		 7215 return 0;
7216}
8d35301d 7217
8d35301d 7218static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7219 struct nfs41_create_session_res *res)
8d35301d 7220{
43c2e885 7221 int ret;
8d35301d 7222
79969dd1 7223 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7224 if (ret)
7225 return ret;
79969dd1
TM		 7226 return nfs4_verify_back_channel_attrs(args, res);
7227}
7228
7229static void nfs4_update_session(struct nfs4_session *session,
7230 struct nfs41_create_session_res *res)
7231{
7232 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
7233 session->flags = res->flags;
7234 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7235 if (res->flags & SESSION4_BACK_CHAN)
7236 memcpy(&session->bc_attrs, &res->bc_attrs,
7237 sizeof(session->bc_attrs));
8d35301d
AA		 7238}
7239
848f5bda
TM		 7240static int _nfs4_proc_create_session(struct nfs_client *clp,
7241 struct rpc_cred *cred)
fc931582
AA		 7242{
7243 struct nfs4_session *session = clp->cl_session;
7244 struct nfs41_create_session_args args = {
7245 .client = clp,
79969dd1
TM		 7246 .clientid = clp->cl_clientid,
7247 .seqid = clp->cl_seqid,
fc931582
AA		 7248 .cb_program = NFS4_CALLBACK,
7249 };
79969dd1
TM		 7250 struct nfs41_create_session_res res;
7251
fc931582
AA		 7252 struct rpc_message msg = {
7253 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7254 .rpc_argp = &args,
7255 .rpc_resp = &res,
848f5bda 7256 .rpc_cred = cred,
fc931582
AA		 7257 };
7258 int status;
7259
7260 nfs4_init_channel_attrs(&args);
0f91421e 7261 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7262
1bd714f2 7263 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7264 trace_nfs4_create_session(clp, status);
fc931582 7265
43095d39 7266 if (!status) {
8d35301d 7267 /* Verify the session's negotiated channel_attrs values */
79969dd1 7268 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7269 /* Increment the clientid slot sequence id */
79969dd1
TM		 7270 if (clp->cl_seqid == res.seqid)
7271 clp->cl_seqid++;
7272 if (status)
7273 goto out;
7274 nfs4_update_session(session, &res);
fc931582 7275 }
79969dd1 7276out:
fc931582
AA		 7277 return status;
7278}
7279
7280/*
7281 * Issues a CREATE_SESSION operation to the server.
7282 * It is the responsibility of the caller to verify the session is
7283 * expired before calling this routine.
7284 */
848f5bda 7285int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7286{
7287 int status;
7288 unsigned *ptr;
fc931582
AA		 7289 struct nfs4_session *session = clp->cl_session;
7290
7291 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7292
848f5bda 7293 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7294 if (status)
7295 goto out;
7296
aacd5537
AA		 7297 /* Init or reset the session slot tables */
7298 status = nfs4_setup_session_slot_tables(session);
7299 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7300 if (status)
7301 goto out;
7302
7303 ptr = (unsigned *)&session->sess_id.data[0];
7304 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7305 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7306out:
7307 dprintk("<-- %s\n", __func__);
7308 return status;
7309}
7310
0f3e66c6
AA		 7311/*
7312 * Issue the over-the-wire RPC DESTROY_SESSION.
7313 * The caller must serialize access to this routine.
7314 */
848f5bda
TM		 7315int nfs4_proc_destroy_session(struct nfs4_session *session,
7316 struct rpc_cred *cred)
0f3e66c6 7317{
848f5bda
TM		 7318 struct rpc_message msg = {
7319 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7320 .rpc_argp = session,
7321 .rpc_cred = cred,
7322 };
0f3e66c6 7323 int status = 0;
0f3e66c6
AA		 7324
7325 dprintk("--> nfs4_proc_destroy_session\n");
7326
7327 /* session is still being setup */
7328 if (session->clp->cl_cons_state != NFS_CS_READY)
7329 return status;
7330
1bd714f2 7331 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7332 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7333
7334 if (status)
08106ac7 7335 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7336 "Session has been destroyed regardless...\n", status);
7337
7338 dprintk("<-- nfs4_proc_destroy_session\n");
7339 return status;
7340}
7341
fc01cea9
AA		 7342/*
7343 * Renew the cl_session lease.
7344 */
d5f8d3fe
TM		 7345struct nfs4_sequence_data {
7346 struct nfs_client *clp;
7347 struct nfs4_sequence_args args;
7348 struct nfs4_sequence_res res;
7349};
7350
dc96aef9
AB		 7351static void nfs41_sequence_release(void *data)
7352{
d5f8d3fe
TM		 7353 struct nfs4_sequence_data *calldata = data;
7354 struct nfs_client *clp = calldata->clp;
dc96aef9 7355
7135840f
AB		 7356 if (atomic_read(&clp->cl_count) > 1)
7357 nfs4_schedule_state_renewal(clp);
7358 nfs_put_client(clp);
d5f8d3fe 7359 kfree(calldata);
dc96aef9
AB		 7360}
7361
aa5190d0
TM		 7362static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7363{
7364 switch(task->tk_status) {
7365 case -NFS4ERR_DELAY:
aa5190d0
TM		 7366 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7367 return -EAGAIN;
7368 default:
0400a6b0 7369 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7370 }
7371 return 0;
7372}
7373
dc96aef9 7374static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7375{
d5f8d3fe
TM		 7376 struct nfs4_sequence_data *calldata = data;
7377 struct nfs_client *clp = calldata->clp;
fc01cea9 7378
14516c3a
TM		 7379 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7380 return;
fc01cea9 7381
c6d01c6f 7382 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7383 if (task->tk_status < 0) {
7384 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7385 if (atomic_read(&clp->cl_count) == 1)
7386 goto out;
fc01cea9 7387
aa5190d0
TM		 7388 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7389 rpc_restart_call_prepare(task);
fc01cea9
AA		 7390 return;
7391 }
7392 }
fc01cea9 7393 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7394out:
fc01cea9
AA		 7395 dprintk("<-- %s\n", __func__);
7396}
7397
7398static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7399{
d5f8d3fe
TM		 7400 struct nfs4_sequence_data *calldata = data;
7401 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7402 struct nfs4_sequence_args *args;
7403 struct nfs4_sequence_res *res;
7404
fc01cea9
AA		 7405 args = task->tk_msg.rpc_argp;
7406 res = task->tk_msg.rpc_resp;
7407
d9afbd1b 7408 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7409}
7410
7411static const struct rpc_call_ops nfs41_sequence_ops = {
7412 .rpc_call_done = nfs41_sequence_call_done,
7413 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7414 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7415};
7416
8fe72bac
TM		 7417static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7418 struct rpc_cred *cred,
7419 bool is_privileged)
fc01cea9 7420{
d5f8d3fe 7421 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7422 struct rpc_message msg = {
7423 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7424 .rpc_cred = cred,
7425 };
71ac6da9
TM		 7426 struct rpc_task_setup task_setup_data = {
7427 .rpc_client = clp->cl_rpcclient,
7428 .rpc_message = &msg,
8fe72bac 7429 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7430 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7431 };
fc01cea9 7432
7135840f 7433 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7434 return ERR_PTR(-EIO);
dfb4f309 7435 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7436 if (calldata == NULL) {
7135840f 7437 nfs_put_client(clp);
71ac6da9 7438 return ERR_PTR(-ENOMEM);
fc01cea9 7439 }
a9c92d6b 7440 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7441 if (is_privileged)
7442 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7443 msg.rpc_argp = &calldata->args;
7444 msg.rpc_resp = &calldata->res;
7445 calldata->clp = clp;
71ac6da9 7446 task_setup_data.callback_data = calldata;
fc01cea9 7447
71ac6da9
TM		 7448 return rpc_run_task(&task_setup_data);
7449}
7450
2f60ea6b 7451static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7452{
7453 struct rpc_task *task;
7454 int ret = 0;
7455
2f60ea6b 7456 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7457 return -EAGAIN;
8fe72bac 7458 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7459 if (IS_ERR(task))
7460 ret = PTR_ERR(task);
7461 else
bf294b41 7462 rpc_put_task_async(task);
71ac6da9
TM		 7463 dprintk("<-- %s status=%d\n", __func__, ret);
7464 return ret;
7465}
7466
7467static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7468{
7469 struct rpc_task *task;
7470 int ret;
7471
8fe72bac 7472 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7473 if (IS_ERR(task)) {
7474 ret = PTR_ERR(task);
7475 goto out;
7476 }
7477 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7478 if (!ret) {
7479 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7480
7481 if (task->tk_status == 0)
7482 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7483 ret = task->tk_status;
b4410c2f 7484 }
71ac6da9
TM		 7485 rpc_put_task(task);
7486out:
7487 dprintk("<-- %s status=%d\n", __func__, ret);
7488 return ret;
fc01cea9
AA		 7489}
7490
fce5c838
RL		 7491struct nfs4_reclaim_complete_data {
7492 struct nfs_client *clp;
7493 struct nfs41_reclaim_complete_args arg;
7494 struct nfs41_reclaim_complete_res res;
7495};
7496
7497static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7498{
7499 struct nfs4_reclaim_complete_data *calldata = data;
7500
d9afbd1b
TM		 7501 nfs41_setup_sequence(calldata->clp->cl_session,
7502 &calldata->arg.seq_args,
7503 &calldata->res.seq_res,
7504 task);
fce5c838
RL		 7505}
7506
aa5190d0
TM		 7507static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7508{
7509 switch(task->tk_status) {
7510 case 0:
7511 case -NFS4ERR_COMPLETE_ALREADY:
7512 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7513 break;
7514 case -NFS4ERR_DELAY:
aa5190d0 7515 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7516 /* fall through */
7517 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7518 return -EAGAIN;
7519 default:
0400a6b0 7520 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7521 }
7522 return 0;
7523}
7524
fce5c838
RL		 7525static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7526{
7527 struct nfs4_reclaim_complete_data *calldata = data;
7528 struct nfs_client *clp = calldata->clp;
7529 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7530
7531 dprintk("--> %s\n", __func__);
14516c3a
TM		 7532 if (!nfs41_sequence_done(task, res))
7533 return;
fce5c838 7534
c6d01c6f 7535 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7536 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7537 rpc_restart_call_prepare(task);
7538 return;
7539 }
fce5c838
RL		 7540 dprintk("<-- %s\n", __func__);
7541}
7542
7543static void nfs4_free_reclaim_complete_data(void *data)
7544{
7545 struct nfs4_reclaim_complete_data *calldata = data;
7546
7547 kfree(calldata);
7548}
7549
7550static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7551 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7552 .rpc_call_done = nfs4_reclaim_complete_done,
7553 .rpc_release = nfs4_free_reclaim_complete_data,
7554};
7555
7556/*
7557 * Issue a global reclaim complete.
7558 */
965e9c23
TM		 7559static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7560 struct rpc_cred *cred)
fce5c838
RL		 7561{
7562 struct nfs4_reclaim_complete_data *calldata;
7563 struct rpc_task *task;
7564 struct rpc_message msg = {
7565 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7566 .rpc_cred = cred,
fce5c838
RL		 7567 };
7568 struct rpc_task_setup task_setup_data = {
7569 .rpc_client = clp->cl_rpcclient,
7570 .rpc_message = &msg,
7571 .callback_ops = &nfs4_reclaim_complete_call_ops,
7572 .flags = RPC_TASK_ASYNC,
7573 };
7574 int status = -ENOMEM;
7575
7576 dprintk("--> %s\n", __func__);
8535b2be 7577 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7578 if (calldata == NULL)
7579 goto out;
7580 calldata->clp = clp;
7581 calldata->arg.one_fs = 0;
fce5c838 7582
a9c92d6b 7583 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7584 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7585 msg.rpc_argp = &calldata->arg;
7586 msg.rpc_resp = &calldata->res;
7587 task_setup_data.callback_data = calldata;
7588 task = rpc_run_task(&task_setup_data);
acf82b85 7589 if (IS_ERR(task)) {
fce5c838 7590 status = PTR_ERR(task);
acf82b85
DC		 7591 goto out;
7592 }
c34c32ea
AA		 7593 status = nfs4_wait_for_completion_rpc_task(task);
7594 if (status == 0)
7595 status = task->tk_status;
fce5c838 7596 rpc_put_task(task);
acf82b85 7597 return 0;
fce5c838
RL		 7598out:
7599 dprintk("<-- %s status=%d\n", __func__, status);
7600 return status;
7601}
b1f69b75
AA		 7602
7603static void
7604nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7605{
7606 struct nfs4_layoutget *lgp = calldata;
c31663d4 7607 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7608 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7609
7610 dprintk("--> %s\n", __func__);
c31663d4
FI		 7611 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7612 * right now covering the LAYOUTGET we are about to send.
7613 * However, that is not so catastrophic, and there seems
7614 * to be no way to prevent it completely.
7615 */
6ba7db34 7616 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7617 &lgp->res.seq_res, task))
b1f69b75 7618 return;
cf7d63f1
FI		 7619 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7620 NFS_I(lgp->args.inode)->layout,
ce6ab4f2 7621 &lgp->args.range,
cf7d63f1
FI		 7622 lgp->args.ctx->state)) {
7623 rpc_exit(task, NFS4_OK);
cf7d63f1 7624 }
b1f69b75
AA		 7625}
7626
7627static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7628{
7629 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7630 struct inode *inode = lgp->args.inode;
7631 struct nfs_server *server = NFS_SERVER(inode);
7632 struct pnfs_layout_hdr *lo;
7633 struct nfs4_state *state = NULL;
ed7e5423 7634 unsigned long timeo, now, giveup;
b1f69b75 7635
ed7e5423 7636 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7637
6ba7db34 7638 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7639 goto out;
b1f69b75
AA		 7640
7641 switch (task->tk_status) {
7642 case 0:
ee314c2a 7643 goto out;
ed7e5423
BH		 7644 /*
7645 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7646 * (or clients) writing to the same RAID stripe
7647 */
b1f69b75 7648 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7649 /*
7650 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7651 * existing layout before getting a new one).
7652 */
b1f69b75 7653 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7654 timeo = rpc_get_timeout(task->tk_client);
7655 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7656 now = jiffies;
7657 if (time_after(giveup, now)) {
7658 unsigned long delay;
7659
7660 /* Delay for:
7661 * - Not less then NFS4_POLL_RETRY_MIN.
7662 * - One last time a jiffie before we give up
7663 * - exponential backoff (time_now minus start_attempt)
7664 */
7665 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7666 min((giveup - now - 1),
7667 now - lgp->args.timestamp));
7668
7669 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7670 __func__, delay);
7671 rpc_delay(task, delay);
7672 task->tk_status = 0;
7673 rpc_restart_call_prepare(task);
7674 goto out; /* Do not call nfs4_async_handle_error() */
7675 }
ee314c2a
TM		 7676 break;
7677 case -NFS4ERR_EXPIRED:
7678 case -NFS4ERR_BAD_STATEID:
7679 spin_lock(&inode->i_lock);
7680 lo = NFS_I(inode)->layout;
7681 if (!lo || list_empty(&lo->plh_segs)) {
7682 spin_unlock(&inode->i_lock);
7683 /* If the open stateid was bad, then recover it. */
7684 state = lgp->args.ctx->state;
7685 } else {
7686 LIST_HEAD(head);
7687
defb8460
CH		 7688 /*
7689 * Mark the bad layout state as invalid, then retry
7690 * with the current stateid.
7691 */
ee314c2a
TM		 7692 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7693 spin_unlock(&inode->i_lock);
ee314c2a 7694 pnfs_free_lseg_list(&head);
defb8460
CH		 7695
7696 task->tk_status = 0;
7697 rpc_restart_call_prepare(task);
b1f69b75
AA		 7698 }
7699 }
8478eaa1 7700 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
ee314c2a
TM		 7701 rpc_restart_call_prepare(task);
7702out:
b1f69b75
AA		 7703 dprintk("<-- %s\n", __func__);
7704}
7705
8554116e
IK		 7706static size_t max_response_pages(struct nfs_server *server)
7707{
7708 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7709 return nfs_page_array_len(0, max_resp_sz);
7710}
7711
7712static void nfs4_free_pages(struct page **pages, size_t size)
7713{
7714 int i;
7715
7716 if (!pages)
7717 return;
7718
7719 for (i = 0; i < size; i++) {
7720 if (!pages[i])
7721 break;
7722 __free_page(pages[i]);
7723 }
7724 kfree(pages);
7725}
7726
7727static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7728{
7729 struct page **pages;
7730 int i;
7731
7732 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7733 if (!pages) {
7734 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7735 return NULL;
7736 }
7737
7738 for (i = 0; i < size; i++) {
7739 pages[i] = alloc_page(gfp_flags);
7740 if (!pages[i]) {
7741 dprintk("%s: failed to allocate page\n", __func__);
7742 nfs4_free_pages(pages, size);
7743 return NULL;
7744 }
7745 }
7746
7747 return pages;
7748}
7749
b1f69b75
AA		 7750static void nfs4_layoutget_release(void *calldata)
7751{
7752 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7753 struct inode *inode = lgp->args.inode;
7754 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7755 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7756
7757 dprintk("--> %s\n", __func__);
8554116e 7758 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7759 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7760 put_nfs_open_context(lgp->args.ctx);
7761 kfree(calldata);
7762 dprintk("<-- %s\n", __func__);
7763}
7764
7765static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7766 .rpc_call_prepare = nfs4_layoutget_prepare,
7767 .rpc_call_done = nfs4_layoutget_done,
7768 .rpc_release = nfs4_layoutget_release,
7769};
7770
a0b0a6e3
TM		 7771struct pnfs_layout_segment *
7772nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7773{
a47970ff
WAA		 7774 struct inode *inode = lgp->args.inode;
7775 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7776 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7777 struct rpc_task *task;
7778 struct rpc_message msg = {
7779 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7780 .rpc_argp = &lgp->args,
7781 .rpc_resp = &lgp->res,
6ab59344 7782 .rpc_cred = lgp->cred,
b1f69b75
AA		 7783 };
7784 struct rpc_task_setup task_setup_data = {
7785 .rpc_client = server->client,
7786 .rpc_message = &msg,
7787 .callback_ops = &nfs4_layoutget_call_ops,
7788 .callback_data = lgp,
7789 .flags = RPC_TASK_ASYNC,
7790 };
a0b0a6e3 7791 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7792 int status = 0;
7793
7794 dprintk("--> %s\n", __func__);
7795
4bd5a980
PT		 7796 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7797 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7798
8554116e
IK		 7799 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7800 if (!lgp->args.layout.pages) {
7801 nfs4_layoutget_release(lgp);
a0b0a6e3 7802 return ERR_PTR(-ENOMEM);
8554116e
IK		 7803 }
7804 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7805 lgp->args.timestamp = jiffies;
8554116e 7806
35124a09 7807 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7808 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7809 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 7810
b1f69b75
AA		 7811 task = rpc_run_task(&task_setup_data);
7812 if (IS_ERR(task))
a0b0a6e3 7813 return ERR_CAST(task);
b1f69b75 7814 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7815 if (status == 0)
7816 status = task->tk_status;
1037e6ea
TM		 7817 trace_nfs4_layoutget(lgp->args.ctx,
7818 &lgp->args.range,
7819 &lgp->res.range,
7820 status);
085b7a45
WAA		 7821 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7822 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7823 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7824 rpc_put_task(task);
7825 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7826 if (status)
7827 return ERR_PTR(status);
7828 return lseg;
b1f69b75
AA		 7829}
7830
cbe82603
BH		 7831static void
7832nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7833{
7834 struct nfs4_layoutreturn *lrp = calldata;
7835
7836 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7837 nfs41_setup_sequence(lrp->clp->cl_session,
7838 &lrp->args.seq_args,
7839 &lrp->res.seq_res,
7840 task);
cbe82603
BH		 7841}
7842
7843static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7844{
7845 struct nfs4_layoutreturn *lrp = calldata;
7846 struct nfs_server *server;
7847
7848 dprintk("--> %s\n", __func__);
7849
6ba7db34 7850 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7851 return;
7852
7853 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7854 switch (task->tk_status) {
7855 default:
7856 task->tk_status = 0;
7857 case 0:
7858 break;
7859 case -NFS4ERR_DELAY:
8478eaa1 7860 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 7861 break;
d00c5d43 7862 rpc_restart_call_prepare(task);
cbe82603
BH		 7863 return;
7864 }
cbe82603
BH		 7865 dprintk("<-- %s\n", __func__);
7866}
7867
7868static void nfs4_layoutreturn_release(void *calldata)
7869{
7870 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7871 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7872
7873 dprintk("--> %s\n", __func__);
849b286f
TM		 7874 spin_lock(&lo->plh_inode->i_lock);
7875 if (lrp->res.lrs_present)
7876 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
d67ae825 7877 pnfs_clear_layoutreturn_waitbit(lo);
193e3aa2
PT		 7878 clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, &lo->plh_flags);
7879 rpc_wake_up(&NFS_SERVER(lo->plh_inode)->roc_rpcwaitq);
849b286f
TM		 7880 lo->plh_block_lgets--;
7881 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7882 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 7883 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 7884 kfree(calldata);
7885 dprintk("<-- %s\n", __func__);
7886}
7887
7888static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7889 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7890 .rpc_call_done = nfs4_layoutreturn_done,
7891 .rpc_release = nfs4_layoutreturn_release,
7892};
7893
6c16605d 7894int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 7895{
7896 struct rpc_task *task;
7897 struct rpc_message msg = {
7898 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7899 .rpc_argp = &lrp->args,
7900 .rpc_resp = &lrp->res,
9556000d 7901 .rpc_cred = lrp->cred,
cbe82603
BH		 7902 };
7903 struct rpc_task_setup task_setup_data = {
1771c577 7904 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7905 .rpc_message = &msg,
7906 .callback_ops = &nfs4_layoutreturn_call_ops,
7907 .callback_data = lrp,
7908 };
6c16605d 7909 int status = 0;
cbe82603
BH		 7910
7911 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 7912 if (!sync) {
7913 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
7914 if (!lrp->inode) {
7915 nfs4_layoutreturn_release(lrp);
7916 return -EAGAIN;
7917 }
7918 task_setup_data.flags |= RPC_TASK_ASYNC;
7919 }
a9c92d6b 7920 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7921 task = rpc_run_task(&task_setup_data);
7922 if (IS_ERR(task))
7923 return PTR_ERR(task);
5a0ec8ac
TM		 7924 if (sync)
7925 status = task->tk_status;
1037e6ea 7926 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7927 dprintk("<-- %s status=%d\n", __func__, status);
7928 rpc_put_task(task);
7929 return status;
7930}
7931
b1f69b75 7932static int
cd5875fe
TM		 7933_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7934 struct pnfs_device *pdev,
7935 struct rpc_cred *cred)
b1f69b75
AA		 7936{
7937 struct nfs4_getdeviceinfo_args args = {
7938 .pdev = pdev,
7939 };
7940 struct nfs4_getdeviceinfo_res res = {
7941 .pdev = pdev,
7942 };
7943 struct rpc_message msg = {
7944 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7945 .rpc_argp = &args,
7946 .rpc_resp = &res,
cd5875fe 7947 .rpc_cred = cred,
b1f69b75
AA		 7948 };
7949 int status;
7950
7951 dprintk("--> %s\n", __func__);
7c513058 7952 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7953 dprintk("<-- %s status=%d\n", __func__, status);
7954
7955 return status;
7956}
7957
cd5875fe
TM		 7958int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7959 struct pnfs_device *pdev,
7960 struct rpc_cred *cred)
b1f69b75
AA		 7961{
7962 struct nfs4_exception exception = { };
7963 int err;
7964
7965 do {
7966 err = nfs4_handle_exception(server,
cd5875fe 7967 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7968 &exception);
7969 } while (exception.retry);
7970 return err;
7971}
7972EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7973
863a3c6c
AA		 7974static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7975{
7976 struct nfs4_layoutcommit_data *data = calldata;
7977 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7978 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7979
d9afbd1b
TM		 7980 nfs41_setup_sequence(session,
7981 &data->args.seq_args,
7982 &data->res.seq_res,
7983 task);
863a3c6c
AA		 7984}
7985
7986static void
7987nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7988{
7989 struct nfs4_layoutcommit_data *data = calldata;
7990 struct nfs_server *server = NFS_SERVER(data->args.inode);
7991
6ba7db34 7992 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7993 return;
7994
7995 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7996 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7997 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7998 case -NFS4ERR_BADLAYOUT: /* no layout */
7999 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8000 task->tk_status = 0;
e59d27e0 8001 case 0:
e59d27e0
TM		 8002 break;
8003 default:
8478eaa1 8004 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8005 rpc_restart_call_prepare(task);
8006 return;
8007 }
8008 }
863a3c6c
AA		 8009}
8010
8011static void nfs4_layoutcommit_release(void *calldata)
8012{
8013 struct nfs4_layoutcommit_data *data = calldata;
8014
db29c089 8015 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8016 nfs_post_op_update_inode_force_wcc(data->args.inode,
8017 data->res.fattr);
863a3c6c 8018 put_rpccred(data->cred);
472e2594 8019 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8020 kfree(data);
8021}
8022
8023static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8024 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8025 .rpc_call_done = nfs4_layoutcommit_done,
8026 .rpc_release = nfs4_layoutcommit_release,
8027};
8028
8029int
ef311537 8030nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8031{
8032 struct rpc_message msg = {
8033 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8034 .rpc_argp = &data->args,
8035 .rpc_resp = &data->res,
8036 .rpc_cred = data->cred,
8037 };
8038 struct rpc_task_setup task_setup_data = {
8039 .task = &data->task,
8040 .rpc_client = NFS_CLIENT(data->args.inode),
8041 .rpc_message = &msg,
8042 .callback_ops = &nfs4_layoutcommit_ops,
8043 .callback_data = data,
863a3c6c
AA		 8044 };
8045 struct rpc_task *task;
8046 int status = 0;
8047
8048 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
8049 "lbw: %llu inode %lu\n",
8050 data->task.tk_pid, sync,
8051 data->args.lastbytewritten,
8052 data->args.inode->i_ino);
8053
472e2594
TM		 8054 if (!sync) {
8055 data->inode = nfs_igrab_and_active(data->args.inode);
8056 if (data->inode == NULL) {
8057 nfs4_layoutcommit_release(data);
8058 return -EAGAIN;
8059 }
8060 task_setup_data.flags = RPC_TASK_ASYNC;
8061 }
a9c92d6b 8062 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8063 task = rpc_run_task(&task_setup_data);
8064 if (IS_ERR(task))
8065 return PTR_ERR(task);
472e2594
TM		 8066 if (sync)
8067 status = task->tk_status;
1037e6ea 8068 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 8069 dprintk("%s: status %d\n", __func__, status);
8070 rpc_put_task(task);
8071 return status;
8072}
fca78d6d 8073
97431204
AA		 8074/**
8075 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8076 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8077 */
fca78d6d
BS		 8078static int
8079_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8080 struct nfs_fsinfo *info,
8081 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8082{
8083 struct nfs41_secinfo_no_name_args args = {
8084 .style = SECINFO_STYLE_CURRENT_FH,
8085 };
8086 struct nfs4_secinfo_res res = {
8087 .flavors = flavors,
8088 };
8089 struct rpc_message msg = {
8090 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8091 .rpc_argp = &args,
8092 .rpc_resp = &res,
8093 };
b1b3e136 8094 struct rpc_clnt *clnt = server->client;
7cb852df 8095 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8096 int status;
8097
8098 if (use_integrity) {
8099 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8100 cred = nfs4_get_clid_cred(server->nfs_client);
8101 msg.rpc_cred = cred;
b1b3e136
WAA		 8102 }
8103
8104 dprintk("--> %s\n", __func__);
8105 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8106 &res.seq_res, 0);
8107 dprintk("<-- %s status=%d\n", __func__, status);
8108
7cb852df
WAA		 8109 if (cred)
8110 put_rpccred(cred);
b1b3e136
WAA		 8111
8112 return status;
fca78d6d
BS		 8113}
8114
8115static int
8116nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8117 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8118{
8119 struct nfs4_exception exception = { };
8120 int err;
8121 do {
b1b3e136
WAA		 8122 /* first try using integrity protection */
8123 err = -NFS4ERR_WRONGSEC;
8124
8125 /* try to use integrity protection with machine cred */
8126 if (_nfs4_is_integrity_protected(server->nfs_client))
8127 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8128 flavors, true);
8129
8130 /*
8131 * if unable to use integrity protection, or SECINFO with
8132 * integrity protection returns NFS4ERR_WRONGSEC (which is
8133 * disallowed by spec, but exists in deployed servers) use
8134 * the current filesystem's rpc_client and the user cred.
8135 */
8136 if (err == -NFS4ERR_WRONGSEC)
8137 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8138 flavors, false);
8139
fca78d6d
BS		 8140 switch (err) {
8141 case 0:
8142 case -NFS4ERR_WRONGSEC:
78b19bae 8143 case -ENOTSUPP:
05e9cfb4 8144 goto out;
fca78d6d
BS		 8145 default:
8146 err = nfs4_handle_exception(server, err, &exception);
8147 }
8148 } while (exception.retry);
05e9cfb4 8149out:
fca78d6d
BS		 8150 return err;
8151}
8152
8153static int
8154nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8155 struct nfs_fsinfo *info)
8156{
8157 int err;
8158 struct page *page;
367156d9 8159 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8160 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8161 struct nfs4_secinfo4 *secinfo;
8162 int i;
fca78d6d
BS		 8163
8164 page = alloc_page(GFP_KERNEL);
8165 if (!page) {
8166 err = -ENOMEM;
8167 goto out;
8168 }
8169
8170 flavors = page_address(page);
8171 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8172
8173 /*
8174 * Fall back on "guess and check" method if
8175 * the server doesn't support SECINFO_NO_NAME
8176 */
78b19bae 8177 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8178 err = nfs4_find_root_sec(server, fhandle, info);
8179 goto out_freepage;
8180 }
8181 if (err)
8182 goto out_freepage;
8183
58a8cf12
WAA		 8184 for (i = 0; i < flavors->num_flavors; i++) {
8185 secinfo = &flavors->flavors[i];
8186
8187 switch (secinfo->flavor) {
8188 case RPC_AUTH_NULL:
8189 case RPC_AUTH_UNIX:
8190 case RPC_AUTH_GSS:
8191 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8192 &secinfo->flavor_info);
8193 break;
8194 default:
8195 flavor = RPC_AUTH_MAXFLAVOR;
8196 break;
8197 }
8198
4d4b69dd
WAA		 8199 if (!nfs_auth_info_match(&server->auth_info, flavor))
8200 flavor = RPC_AUTH_MAXFLAVOR;
8201
58a8cf12
WAA		 8202 if (flavor != RPC_AUTH_MAXFLAVOR) {
8203 err = nfs4_lookup_root_sec(server, fhandle,
8204 info, flavor);
8205 if (!err)
8206 break;
8207 }
8208 }
8209
8210 if (flavor == RPC_AUTH_MAXFLAVOR)
8211 err = -EPERM;
fca78d6d
BS		 8212
8213out_freepage:
8214 put_page(page);
8215 if (err == -EACCES)
8216 return -EPERM;
8217out:
8218 return err;
8219}
1cab0652 8220
ab7cb0df
TM		 8221static int _nfs41_test_stateid(struct nfs_server *server,
8222 nfs4_stateid *stateid,
8223 struct rpc_cred *cred)
7d974794
BS		 8224{
8225 int status;
8226 struct nfs41_test_stateid_args args = {
1cab0652 8227 .stateid = stateid,
7d974794
BS		 8228 };
8229 struct nfs41_test_stateid_res res;
8230 struct rpc_message msg = {
8231 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8232 .rpc_argp = &args,
8233 .rpc_resp = &res,
ab7cb0df 8234 .rpc_cred = cred,
7d974794 8235 };
3787d506
WAA		 8236 struct rpc_clnt *rpc_client = server->client;
8237
8238 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8239 &rpc_client, &msg);
1cab0652 8240
38527b15 8241 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8242 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8243 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8244 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8245 &args.seq_args, &res.seq_res);
38527b15
CL		 8246 if (status != NFS_OK) {
8247 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8248 return status;
38527b15
CL		 8249 }
8250 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8251 return -res.status;
7d974794
BS		 8252}
8253
38527b15
CL		 8254/**
8255 * nfs41_test_stateid - perform a TEST_STATEID operation
8256 *
8257 * @server: server / transport on which to perform the operation
8258 * @stateid: state ID to test
ab7cb0df 8259 * @cred: credential
38527b15
CL		 8260 *
8261 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8262 * Otherwise a negative NFS4ERR value is returned if the operation
8263 * failed or the state ID is not currently valid.
8264 */
ab7cb0df
TM		 8265static int nfs41_test_stateid(struct nfs_server *server,
8266 nfs4_stateid *stateid,
8267 struct rpc_cred *cred)
7d974794
BS		 8268{
8269 struct nfs4_exception exception = { };
8270 int err;
8271 do {
ab7cb0df 8272 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8273 if (err != -NFS4ERR_DELAY)
8274 break;
8275 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8276 } while (exception.retry);
8277 return err;
8278}
9aeda35f 8279
7c1d5fae
TM		 8280struct nfs_free_stateid_data {
8281 struct nfs_server *server;
8282 struct nfs41_free_stateid_args args;
9aeda35f 8283 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8284};
8285
8286static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8287{
8288 struct nfs_free_stateid_data *data = calldata;
8289 nfs41_setup_sequence(nfs4_get_session(data->server),
8290 &data->args.seq_args,
8291 &data->res.seq_res,
8292 task);
8293}
8294
8295static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8296{
8297 struct nfs_free_stateid_data *data = calldata;
8298
8299 nfs41_sequence_done(task, &data->res.seq_res);
8300
8301 switch (task->tk_status) {
8302 case -NFS4ERR_DELAY:
8478eaa1 8303 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8304 rpc_restart_call_prepare(task);
8305 }
8306}
8307
8308static void nfs41_free_stateid_release(void *calldata)
8309{
8310 kfree(calldata);
8311}
8312
17f26b12 8313static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8314 .rpc_call_prepare = nfs41_free_stateid_prepare,
8315 .rpc_call_done = nfs41_free_stateid_done,
8316 .rpc_release = nfs41_free_stateid_release,
8317};
8318
8319static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8320 nfs4_stateid *stateid,
ab7cb0df 8321 struct rpc_cred *cred,
7c1d5fae
TM		 8322 bool privileged)
8323{
9aeda35f
BS		 8324 struct rpc_message msg = {
8325 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8326 .rpc_cred = cred,
9aeda35f 8327 };
7c1d5fae
TM		 8328 struct rpc_task_setup task_setup = {
8329 .rpc_client = server->client,
8330 .rpc_message = &msg,
8331 .callback_ops = &nfs41_free_stateid_ops,
8332 .flags = RPC_TASK_ASYNC,
8333 };
8334 struct nfs_free_stateid_data *data;
9aeda35f 8335
3787d506
WAA		 8336 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8337 &task_setup.rpc_client, &msg);
8338
38527b15 8339 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8340 data = kmalloc(sizeof(*data), GFP_NOFS);
8341 if (!data)
8342 return ERR_PTR(-ENOMEM);
8343 data->server = server;
8344 nfs4_stateid_copy(&data->args.stateid, stateid);
8345
8346 task_setup.callback_data = data;
8347
8348 msg.rpc_argp = &data->args;
8349 msg.rpc_resp = &data->res;
a9c92d6b 8350 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8351 if (privileged)
8352 nfs4_set_sequence_privileged(&data->args.seq_args);
8353
8354 return rpc_run_task(&task_setup);
9aeda35f
BS		 8355}
8356
38527b15
CL		 8357/**
8358 * nfs41_free_stateid - perform a FREE_STATEID operation
8359 *
8360 * @server: server / transport on which to perform the operation
8361 * @stateid: state ID to release
ab7cb0df 8362 * @cred: credential
38527b15
CL		 8363 *
8364 * Returns NFS_OK if the server freed "stateid". Otherwise a
8365 * negative NFS4ERR value is returned.
8366 */
ab7cb0df
TM		 8367static int nfs41_free_stateid(struct nfs_server *server,
8368 nfs4_stateid *stateid,
8369 struct rpc_cred *cred)
9aeda35f 8370{
7c1d5fae
TM		 8371 struct rpc_task *task;
8372 int ret;
8373
ab7cb0df 8374 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8375 if (IS_ERR(task))
8376 return PTR_ERR(task);
8377 ret = rpc_wait_for_completion_task(task);
8378 if (!ret)
8379 ret = task->tk_status;
8380 rpc_put_task(task);
8381 return ret;
9aeda35f 8382}
36281caa 8383
f1cdae87
JL		 8384static void
8385nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8386{
8387 struct rpc_task *task;
ab7cb0df 8388 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8389
ab7cb0df 8390 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8391 nfs4_free_lock_state(server, lsp);
8392 if (IS_ERR(task))
f1cdae87 8393 return;
c8b2d0bf 8394 rpc_put_task(task);
c8b2d0bf
TM		 8395}
8396
36281caa
TM		 8397static bool nfs41_match_stateid(const nfs4_stateid *s1,
8398 const nfs4_stateid *s2)
8399{
2d2f24ad 8400 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8401 return false;
8402
2d2f24ad 8403 if (s1->seqid == s2->seqid)
36281caa 8404 return true;
2d2f24ad 8405 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8406 return true;
8407
8408 return false;
8409}
8410
557134a3
AA		 8411#endif /* CONFIG_NFS_V4_1 */
8412
36281caa
TM		 8413static bool nfs4_match_stateid(const nfs4_stateid *s1,
8414 const nfs4_stateid *s2)
8415{
f597c537 8416 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8417}
8418
8419
17280175 8420static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8421 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8422 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8423 .recover_open = nfs4_open_reclaim,
8424 .recover_lock = nfs4_lock_reclaim,
591d71cb 8425 .establish_clid = nfs4_init_clientid,
05f4c350 8426 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8427};
8428
591d71cb 8429#if defined(CONFIG_NFS_V4_1)
17280175 8430static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8431 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8432 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8433 .recover_open = nfs4_open_reclaim,
8434 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8435 .establish_clid = nfs41_init_clientid,
fce5c838 8436 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8437 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8438};
8439#endif /* CONFIG_NFS_V4_1 */
8440
17280175 8441static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8442 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8443 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8444 .recover_open = nfs40_open_expired,
591d71cb
AA		 8445 .recover_lock = nfs4_lock_expired,
8446 .establish_clid = nfs4_init_clientid,
8447};
8448
8449#if defined(CONFIG_NFS_V4_1)
17280175 8450static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8451 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8452 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8453 .recover_open = nfs41_open_expired,
8454 .recover_lock = nfs41_lock_expired,
4d643d1d 8455 .establish_clid = nfs41_init_clientid,
1da177e4 8456};
591d71cb 8457#endif /* CONFIG_NFS_V4_1 */
1da177e4 8458
17280175 8459static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8460 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8461 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8462 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8463};
8464
8465#if defined(CONFIG_NFS_V4_1)
17280175 8466static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8467 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8468 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8469 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8470};
8471#endif
8472
ec011fe8 8473static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8474 .get_locations = _nfs40_proc_get_locations,
44c99933 8475 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8476};
8477
8478#if defined(CONFIG_NFS_V4_1)
8479static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8480 .get_locations = _nfs41_proc_get_locations,
44c99933 8481 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8482};
8483#endif /* CONFIG_NFS_V4_1 */
8484
97dc1359
TM		 8485static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8486 .minor_version = 0,
39c6daae
TM		 8487 .init_caps = NFS_CAP_READDIRPLUS
8488 | NFS_CAP_ATOMIC_OPEN
8489 | NFS_CAP_CHANGE_ATTR
8490 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8491 .init_client = nfs40_init_client,
8492 .shutdown_client = nfs40_shutdown_client,
36281caa 8493 .match_stateid = nfs4_match_stateid,
fca78d6d 8494 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8495 .free_lock_state = nfs4_release_lockowner,
63f5f796 8496 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8497 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8498 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8499 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8500 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8501 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8502};
8503
8504#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8505static struct nfs_seqid *
8506nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8507{
8508 return NULL;
8509}
8510
97dc1359
TM		 8511static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8512 .minor_version = 1,
39c6daae
TM		 8513 .init_caps = NFS_CAP_READDIRPLUS
8514 | NFS_CAP_ATOMIC_OPEN
8515 | NFS_CAP_CHANGE_ATTR
3b66486c 8516 | NFS_CAP_POSIX_LOCK
49f9a0fa 8517 | NFS_CAP_STATEID_NFSV41
e983120e 8518 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8519 .init_client = nfs41_init_client,
8520 .shutdown_client = nfs41_shutdown_client,
36281caa 8521 .match_stateid = nfs41_match_stateid,
fca78d6d 8522 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8523 .free_lock_state = nfs41_free_lock_state,
63f5f796 8524 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8525 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8526 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8527 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8528 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8529 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8530};
8531#endif
8532
42c2c424
SD		 8533#if defined(CONFIG_NFS_V4_2)
8534static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8535 .minor_version = 2,
7017310a
BS		 8536 .init_caps = NFS_CAP_READDIRPLUS
8537 | NFS_CAP_ATOMIC_OPEN
8538 | NFS_CAP_CHANGE_ATTR
8539 | NFS_CAP_POSIX_LOCK
8540 | NFS_CAP_STATEID_NFSV41
e983120e 8541 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8542 | NFS_CAP_ALLOCATE
624bd5b7 8543 | NFS_CAP_DEALLOCATE
e983120e 8544 | NFS_CAP_SEEK,
abf79bb3
CL		 8545 .init_client = nfs41_init_client,
8546 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8547 .match_stateid = nfs41_match_stateid,
8548 .find_root_sec = nfs41_find_root_sec,
7017310a 8549 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8550 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8551 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8552 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8553 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8554 .state_renewal_ops = &nfs41_state_renewal_ops,
8555};
8556#endif
8557
97dc1359
TM		 8558const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8559 [0] = &nfs_v4_0_minor_ops,
8560#if defined(CONFIG_NFS_V4_1)
8561 [1] = &nfs_v4_1_minor_ops,
8562#endif
42c2c424
SD		 8563#if defined(CONFIG_NFS_V4_2)
8564 [2] = &nfs_v4_2_minor_ops,
8565#endif
97dc1359
TM		 8566};
8567
17f26b12 8568static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8569 .create = nfs_create,
8570 .lookup = nfs_lookup,
8571 .atomic_open = nfs_atomic_open,
8572 .link = nfs_link,
8573 .unlink = nfs_unlink,
8574 .symlink = nfs_symlink,
8575 .mkdir = nfs_mkdir,
8576 .rmdir = nfs_rmdir,
8577 .mknod = nfs_mknod,
8578 .rename = nfs_rename,
8579 .permission = nfs_permission,
8580 .getattr = nfs_getattr,
8581 .setattr = nfs_setattr,
8582 .getxattr = generic_getxattr,
8583 .setxattr = generic_setxattr,
8584 .listxattr = generic_listxattr,
8585 .removexattr = generic_removexattr,
8586};
8587
92e1d5be 8588static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8589 .permission = nfs_permission,
8590 .getattr = nfs_getattr,
8591 .setattr = nfs_setattr,
64c2ce8b
AK		 8592 .getxattr = generic_getxattr,
8593 .setxattr = generic_setxattr,
8594 .listxattr = generic_listxattr,
8595 .removexattr = generic_removexattr,
6b3b5496
BF		 8596};
8597
509de811 8598const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8599 .version = 4, /* protocol version */
8600 .dentry_ops = &nfs4_dentry_operations,
8601 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8602 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8603 .file_ops = &nfs4_file_operations,
1da177e4 8604 .getroot = nfs4_proc_get_root,
281cad46 8605 .submount = nfs4_submount,
ff9099f2 8606 .try_mount = nfs4_try_mount,
1da177e4
LT		 8607 .getattr = nfs4_proc_getattr,
8608 .setattr = nfs4_proc_setattr,
8609 .lookup = nfs4_proc_lookup,
8610 .access = nfs4_proc_access,
8611 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8612 .create = nfs4_proc_create,
8613 .remove = nfs4_proc_remove,
8614 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8615 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8616 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8617 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8618 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8619 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8620 .link = nfs4_proc_link,
8621 .symlink = nfs4_proc_symlink,
8622 .mkdir = nfs4_proc_mkdir,
8623 .rmdir = nfs4_proc_remove,
8624 .readdir = nfs4_proc_readdir,
8625 .mknod = nfs4_proc_mknod,
8626 .statfs = nfs4_proc_statfs,
8627 .fsinfo = nfs4_proc_fsinfo,
8628 .pathconf = nfs4_proc_pathconf,
e9326dca 8629 .set_capabilities = nfs4_server_capabilities,
1da177e4 8630 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8631 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8632 .read_setup = nfs4_proc_read_setup,
ec06c096 8633 .read_done = nfs4_read_done,
1da177e4 8634 .write_setup = nfs4_proc_write_setup,
788e7a89 8635 .write_done = nfs4_write_done,
1da177e4 8636 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8637 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8638 .commit_done = nfs4_commit_done,
1da177e4 8639 .lock = nfs4_proc_lock,
e50a1c2e 8640 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8641 .close_context = nfs4_close_context,
2b484297 8642 .open_context = nfs4_atomic_open,
011e2a7f 8643 .have_delegation = nfs4_have_delegation,
57ec14c5 8644 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8645 .alloc_client = nfs4_alloc_client,
45a52a02 8646 .init_client = nfs4_init_client,
cdb7eced 8647 .free_client = nfs4_free_client,
1179acc6
BS		 8648 .create_server = nfs4_create_server,
8649 .clone_server = nfs_clone_server,
1da177e4
LT		 8650};
8651
64c2ce8b
AK		 8652static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8653 .prefix = XATTR_NAME_NFSV4_ACL,
8654 .list = nfs4_xattr_list_nfs4_acl,
8655 .get = nfs4_xattr_get_nfs4_acl,
8656 .set = nfs4_xattr_set_nfs4_acl,
8657};
8658
8659const struct xattr_handler *nfs4_xattr_handlers[] = {
8660 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8661#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8662 &nfs4_xattr_nfs4_label_handler,
8663#endif
64c2ce8b
AK		 8664 NULL
8665};
8666
1da177e4
LT		 8667/*
8668 * Local variables:
8669 * c-basic-offset: 8
8670 * End:
8671 */
Linux 6.x block layer and io_uring tree(s)