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Merge tag 'nfs-rdma-for-4.0-3' of git://git.linux-nfs.org/projects/anna/nfs-rdma
[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;
2ced46c2
TM		 1555 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1556 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1557 nfs4_init_opendata_res(opendata);
b257957e 1558 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1559 if (ret != 0)
1560 return ret;
2ced46c2 1561 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1562 if (IS_ERR(newstate))
1563 return PTR_ERR(newstate);
643168c2 1564 nfs4_close_state(newstate, fmode);
2ced46c2 1565 *res = newstate;
864472e9
TM		 1566 return 0;
1567}
1568
1569static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1570{
864472e9 1571 struct nfs4_state *newstate;
864472e9
TM		 1572 int ret;
1573
4f14c194
TM		 1574 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1575 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1576 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1577 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1578 /* memory barrier prior to reading state->n_* */
2ced46c2 1579 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1580 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1581 smp_rmb();
1582 if (state->n_rdwr != 0) {
2ced46c2 1583 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1584 if (ret != 0)
1585 return ret;
2ced46c2
TM		 1586 if (newstate != state)
1587 return -ESTALE;
864472e9
TM		 1588 }
1589 if (state->n_wronly != 0) {
2ced46c2 1590 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1591 if (ret != 0)
1592 return ret;
2ced46c2
TM		 1593 if (newstate != state)
1594 return -ESTALE;
864472e9
TM		 1595 }
1596 if (state->n_rdonly != 0) {
2ced46c2 1597 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1598 if (ret != 0)
1599 return ret;
2ced46c2
TM		 1600 if (newstate != state)
1601 return -ESTALE;
864472e9 1602 }
1ac7e2fd
TM		 1603 /*
1604 * We may have performed cached opens for all three recoveries.
1605 * Check if we need to update the current stateid.
1606 */
1607 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1608 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1609 write_seqlock(&state->seqlock);
1ac7e2fd 1610 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1611 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1612 write_sequnlock(&state->seqlock);
1ac7e2fd 1613 }
864472e9
TM		 1614 return 0;
1615}
1616
1da177e4
LT		 1617/*
1618 * OPEN_RECLAIM:
1619 * reclaim state on the server after a reboot.
1da177e4 1620 */
539cd03a 1621static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1622{
1ac7e2fd 1623 struct nfs_delegation *delegation;
864472e9 1624 struct nfs4_opendata *opendata;
dc0b027d 1625 fmode_t delegation_type = 0;
1da177e4
LT		 1626 int status;
1627
4a1c0893
TM		 1628 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1629 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1630 if (IS_ERR(opendata))
1631 return PTR_ERR(opendata);
1ac7e2fd
TM		 1632 rcu_read_lock();
1633 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1634 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1635 delegation_type = delegation->type;
1ac7e2fd 1636 rcu_read_unlock();
864472e9
TM		 1637 opendata->o_arg.u.delegation_type = delegation_type;
1638 status = nfs4_open_recover(opendata, state);
c6d00e63 1639 nfs4_opendata_put(opendata);
1da177e4
LT		 1640 return status;
1641}
1642
539cd03a 1643static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1644{
1645 struct nfs_server *server = NFS_SERVER(state->inode);
1646 struct nfs4_exception exception = { };
1647 int err;
1648 do {
539cd03a 1649 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1650 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1651 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1652 continue;
168667c4 1653 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1654 break;
1655 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1656 } while (exception.retry);
1657 return err;
1658}
1659
864472e9
TM		 1660static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1661{
1662 struct nfs_open_context *ctx;
1663 int ret;
1664
1665 ctx = nfs4_state_find_open_context(state);
1666 if (IS_ERR(ctx))
91876b13 1667 return -EAGAIN;
539cd03a 1668 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1669 put_nfs_open_context(ctx);
1670 return ret;
1671}
1672
db4f2e63 1673static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1674{
be76b5b6
TM		 1675 switch (err) {
1676 default:
1677 printk(KERN_ERR "NFS: %s: unhandled error "
1678 "%d.\n", __func__, err);
1679 case 0:
1680 case -ENOENT:
1681 case -ESTALE:
1682 break;
1683 case -NFS4ERR_BADSESSION:
1684 case -NFS4ERR_BADSLOT:
1685 case -NFS4ERR_BAD_HIGH_SLOT:
1686 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1687 case -NFS4ERR_DEADSESSION:
1688 set_bit(NFS_DELEGATED_STATE, &state->flags);
1689 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1690 return -EAGAIN;
1691 case -NFS4ERR_STALE_CLIENTID:
1692 case -NFS4ERR_STALE_STATEID:
1693 set_bit(NFS_DELEGATED_STATE, &state->flags);
1694 case -NFS4ERR_EXPIRED:
1695 /* Don't recall a delegation if it was lost */
1696 nfs4_schedule_lease_recovery(server->nfs_client);
1697 return -EAGAIN;
352297b9
CL		 1698 case -NFS4ERR_MOVED:
1699 nfs4_schedule_migration_recovery(server);
1700 return -EAGAIN;
8ef2f8d4
CL		 1701 case -NFS4ERR_LEASE_MOVED:
1702 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1703 return -EAGAIN;
be76b5b6
TM		 1704 case -NFS4ERR_DELEG_REVOKED:
1705 case -NFS4ERR_ADMIN_REVOKED:
1706 case -NFS4ERR_BAD_STATEID:
db4f2e63 1707 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1708 nfs_inode_find_state_and_recover(state->inode,
1709 stateid);
1710 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1711 return -EAGAIN;
be76b5b6
TM		 1712 case -NFS4ERR_DELAY:
1713 case -NFS4ERR_GRACE:
1714 set_bit(NFS_DELEGATED_STATE, &state->flags);
1715 ssleep(1);
1716 return -EAGAIN;
db4f2e63
TM		 1717 case -ENOMEM:
1718 case -NFS4ERR_DENIED:
1719 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1720 return 0;
be76b5b6 1721 }
1da177e4
LT		 1722 return err;
1723}
1724
db4f2e63
TM		 1725int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1726{
1727 struct nfs_server *server = NFS_SERVER(state->inode);
1728 struct nfs4_opendata *opendata;
1729 int err;
1730
1731 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1732 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1733 if (IS_ERR(opendata))
1734 return PTR_ERR(opendata);
1735 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1736 err = nfs4_open_recover(opendata, state);
1737 nfs4_opendata_put(opendata);
1738 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1739}
1740
be05c860
CL		 1741static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1742{
1743 struct nfs4_opendata *data = calldata;
1744
cb04ad2a
PT		 1745 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1746 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1747}
1748
cdd4e68b
TM		 1749static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1750{
1751 struct nfs4_opendata *data = calldata;
1752
17ead6c8 1753 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1754
cdd4e68b 1755 data->rpc_status = task->tk_status;
26e976a8 1756 if (data->rpc_status == 0) {
f597c537 1757 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1758 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1759 renew_lease(data->o_res.server, data->timestamp);
3e309914 1760 data->rpc_done = 1;
26e976a8 1761 }
cdd4e68b
TM		 1762}
1763
1764static void nfs4_open_confirm_release(void *calldata)
1765{
1766 struct nfs4_opendata *data = calldata;
1767 struct nfs4_state *state = NULL;
1768
1769 /* If this request hasn't been cancelled, do nothing */
1770 if (data->cancelled == 0)
1771 goto out_free;
1772 /* In case of error, no cleanup! */
3e309914 1773 if (!data->rpc_done)
cdd4e68b 1774 goto out_free;
cdd4e68b 1775 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1776 if (!IS_ERR(state))
643168c2 1777 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1778out_free:
c6d00e63 1779 nfs4_opendata_put(data);
cdd4e68b
TM		 1780}
1781
1782static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1783 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1784 .rpc_call_done = nfs4_open_confirm_done,
1785 .rpc_release = nfs4_open_confirm_release,
1786};
1787
1788/*
1789 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1790 */
1791static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1792{
1793 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1794 struct rpc_task *task;
5138fde0
TM		 1795 struct rpc_message msg = {
1796 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1797 .rpc_argp = &data->c_arg,
1798 .rpc_resp = &data->c_res,
1799 .rpc_cred = data->owner->so_cred,
1800 };
c970aa85
TM		 1801 struct rpc_task_setup task_setup_data = {
1802 .rpc_client = server->client,
5138fde0 1803 .rpc_message = &msg,
c970aa85
TM		 1804 .callback_ops = &nfs4_open_confirm_ops,
1805 .callback_data = data,
101070ca 1806 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1807 .flags = RPC_TASK_ASYNC,
1808 };
1da177e4
LT		 1809 int status;
1810
17ead6c8 1811 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1812 kref_get(&data->kref);
3e309914
TM		 1813 data->rpc_done = 0;
1814 data->rpc_status = 0;
5138fde0 1815 data->timestamp = jiffies;
c970aa85 1816 task = rpc_run_task(&task_setup_data);
7a1218a2 1817 if (IS_ERR(task))
cdd4e68b 1818 return PTR_ERR(task);
cdd4e68b
TM		 1819 status = nfs4_wait_for_completion_rpc_task(task);
1820 if (status != 0) {
1821 data->cancelled = 1;
1822 smp_wmb();
1823 } else
1824 status = data->rpc_status;
e6b3c4db 1825 rpc_put_task(task);
1da177e4
LT		 1826 return status;
1827}
1828
24ac23ab 1829static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1830{
24ac23ab
TM		 1831 struct nfs4_opendata *data = calldata;
1832 struct nfs4_state_owner *sp = data->owner;
549b19cc 1833 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1834
24ac23ab 1835 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1836 goto out_wait;
aac00a8d
TM		 1837 /*
1838 * Check if we still need to send an OPEN call, or if we can use
1839 * a delegation instead.
1840 */
1841 if (data->state != NULL) {
1842 struct nfs_delegation *delegation;
1843
dc0b027d 1844 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1845 goto out_no_action;
aac00a8d
TM		 1846 rcu_read_lock();
1847 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1848 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1849 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1850 can_open_delegated(delegation, data->o_arg.fmode))
1851 goto unlock_no_action;
aac00a8d
TM		 1852 rcu_read_unlock();
1853 }
95b72eb0 1854 /* Update client id. */
549b19cc 1855 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1856 switch (data->o_arg.claim) {
1857 case NFS4_OPEN_CLAIM_PREVIOUS:
1858 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1859 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1860 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1861 case NFS4_OPEN_CLAIM_FH:
1862 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1863 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1864 }
26e976a8 1865 data->timestamp = jiffies;
035168ab 1866 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1867 &data->o_arg.seq_args,
2240a9e2
TM		 1868 &data->o_res.seq_res,
1869 task) != 0)
1870 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1871
1872 /* Set the create mode (note dependency on the session type) */
1873 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1874 if (data->o_arg.open_flags & O_EXCL) {
1875 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1876 if (nfs4_has_persistent_session(clp))
1877 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1878 else if (clp->cl_mvops->minor_version > 0)
1879 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1880 }
6ee41268 1881 return;
652f89f6
TM		 1882unlock_no_action:
1883 rcu_read_unlock();
6ee41268
TM		 1884out_no_action:
1885 task->tk_action = NULL;
c8da19b9 1886out_wait:
b75ad4cd 1887 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1888}
1889
24ac23ab
TM		 1890static void nfs4_open_done(struct rpc_task *task, void *calldata)
1891{
1892 struct nfs4_opendata *data = calldata;
1da177e4 1893
24ac23ab 1894 data->rpc_status = task->tk_status;
d898528c 1895
14516c3a
TM		 1896 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1897 return;
d898528c 1898
24ac23ab 1899 if (task->tk_status == 0) {
807d66d8
TM		 1900 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1901 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1902 case S_IFREG:
1903 break;
1904 case S_IFLNK:
24ac23ab 1905 data->rpc_status = -ELOOP;
6f926b5b
TM		 1906 break;
1907 case S_IFDIR:
24ac23ab 1908 data->rpc_status = -EISDIR;
6f926b5b
TM		 1909 break;
1910 default:
24ac23ab 1911 data->rpc_status = -ENOTDIR;
807d66d8 1912 }
6f926b5b 1913 }
26e976a8 1914 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1915 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1916 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1917 }
3e309914 1918 data->rpc_done = 1;
24ac23ab 1919}
6f926b5b 1920
24ac23ab
TM		 1921static void nfs4_open_release(void *calldata)
1922{
1923 struct nfs4_opendata *data = calldata;
1924 struct nfs4_state *state = NULL;
1925
1926 /* If this request hasn't been cancelled, do nothing */
1927 if (data->cancelled == 0)
1928 goto out_free;
1929 /* In case of error, no cleanup! */
3e309914 1930 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1931 goto out_free;
1932 /* In case we need an open_confirm, no cleanup! */
1933 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1934 goto out_free;
24ac23ab 1935 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1936 if (!IS_ERR(state))
643168c2 1937 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1938out_free:
c6d00e63 1939 nfs4_opendata_put(data);
24ac23ab
TM		 1940}
1941
1942static const struct rpc_call_ops nfs4_open_ops = {
1943 .rpc_call_prepare = nfs4_open_prepare,
1944 .rpc_call_done = nfs4_open_done,
1945 .rpc_release = nfs4_open_release,
1946};
1947
b257957e 1948static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1949{
1950 struct inode *dir = data->dir->d_inode;
1951 struct nfs_server *server = NFS_SERVER(dir);
1952 struct nfs_openargs *o_arg = &data->o_arg;
1953 struct nfs_openres *o_res = &data->o_res;
1954 struct rpc_task *task;
5138fde0
TM		 1955 struct rpc_message msg = {
1956 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1957 .rpc_argp = o_arg,
1958 .rpc_resp = o_res,
1959 .rpc_cred = data->owner->so_cred,
1960 };
c970aa85
TM		 1961 struct rpc_task_setup task_setup_data = {
1962 .rpc_client = server->client,
5138fde0 1963 .rpc_message = &msg,
c970aa85
TM		 1964 .callback_ops = &nfs4_open_ops,
1965 .callback_data = data,
101070ca 1966 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1967 .flags = RPC_TASK_ASYNC,
1968 };
24ac23ab
TM		 1969 int status;
1970
a9c92d6b 1971 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1972 kref_get(&data->kref);
3e309914
TM		 1973 data->rpc_done = 0;
1974 data->rpc_status = 0;
2ced46c2 1975 data->cancelled = 0;
bdeca1b7
TM		 1976 data->is_recover = 0;
1977 if (isrecover) {
8fe72bac 1978 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1979 data->is_recover = 1;
1980 }
c970aa85 1981 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1982 if (IS_ERR(task))
1983 return PTR_ERR(task);
1984 status = nfs4_wait_for_completion_rpc_task(task);
1985 if (status != 0) {
1986 data->cancelled = 1;
1987 smp_wmb();
1988 } else
1989 status = data->rpc_status;
1990 rpc_put_task(task);
1991
1992 return status;
1993}
1994
1995static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1996{
1997 struct inode *dir = data->dir->d_inode;
1998 struct nfs_openres *o_res = &data->o_res;
1999 int status;
2000
2001 status = nfs4_run_open_task(data, 1);
2002 if (status != 0 || !data->rpc_done)
2003 return status;
2004
6926afd1
TM		 2005 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2006
b257957e
AB		 2007 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2008 status = _nfs4_proc_open_confirm(data);
2009 if (status != 0)
2010 return status;
2011 }
2012
2013 return status;
2014}
2015
f3792d63
TM		 2016/*
2017 * Additional permission checks in order to distinguish between an
2018 * open for read, and an open for execute. This works around the
2019 * fact that NFSv4 OPEN treats read and execute permissions as being
2020 * the same.
2021 * Note that in the non-execute case, we want to turn off permission
2022 * checking if we just created a new file (POSIX open() semantics).
2023 */
6168f62c
WAA		 2024static int nfs4_opendata_access(struct rpc_cred *cred,
2025 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2026 struct nfs4_state *state, fmode_t fmode,
2027 int openflags)
6168f62c
WAA		 2028{
2029 struct nfs_access_entry cache;
2030 u32 mask;
2031
2032 /* access call failed or for some reason the server doesn't
2033 * support any access modes -- defer access call until later */
2034 if (opendata->o_res.access_supported == 0)
2035 return 0;
2036
2037 mask = 0;
f3792d63
TM		 2038 /*
2039 * Use openflags to check for exec, because fmode won't
2040 * always have FMODE_EXEC set when file open for exec.
2041 */
f8d9a897
WAA		 2042 if (openflags & __FMODE_EXEC) {
2043 /* ONLY check for exec rights */
2044 mask = MAY_EXEC;
f3792d63 2045 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2046 mask = MAY_READ;
6168f62c
WAA		 2047
2048 cache.cred = cred;
2049 cache.jiffies = jiffies;
2050 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2051 nfs_access_add_cache(state->inode, &cache);
2052
bbd3a8ee 2053 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2054 return 0;
2055
2056 /* even though OPEN succeeded, access is denied. Close the file */
2057 nfs4_close_state(state, fmode);
998f40b5 2058 return -EACCES;
6168f62c
WAA		 2059}
2060
b257957e
AB		 2061/*
2062 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2063 */
2064static int _nfs4_proc_open(struct nfs4_opendata *data)
2065{
2066 struct inode *dir = data->dir->d_inode;
2067 struct nfs_server *server = NFS_SERVER(dir);
2068 struct nfs_openargs *o_arg = &data->o_arg;
2069 struct nfs_openres *o_res = &data->o_res;
2070 int status;
2071
2072 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2073 if (!data->rpc_done)
2074 return status;
2075 if (status != 0) {
2076 if (status == -NFS4ERR_BADNAME &&
2077 !(o_arg->open_flags & O_CREAT))
2078 return -ENOENT;
24ac23ab 2079 return status;
08ef7bd3 2080 }
24ac23ab 2081
6926afd1
TM		 2082 nfs_fattr_map_and_free_names(server, &data->f_attr);
2083
5bc2afc2 2084 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2085 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2086 if (o_arg->open_flags & O_EXCL)
2087 data->file_created = 1;
2088 else if (o_res->cinfo.before != o_res->cinfo.after)
2089 data->file_created = 1;
2090 }
0df5dd4a
TM		 2091 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2092 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2093 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2094 status = _nfs4_proc_open_confirm(data);
1da177e4 2095 if (status != 0)
24ac23ab 2096 return status;
1da177e4
LT		 2097 }
2098 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2099 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2100 return 0;
1da177e4
LT		 2101}
2102
d83217c1
AA		 2103static int nfs4_recover_expired_lease(struct nfs_server *server)
2104{
2105 return nfs4_client_recover_expired_lease(server->nfs_client);
2106}
2107
1da177e4
LT		 2108/*
2109 * OPEN_EXPIRED:
2110 * reclaim state on the server after a network partition.
2111 * Assumes caller holds the appropriate lock
2112 */
539cd03a 2113static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2114{
e56e0b78 2115 struct nfs4_opendata *opendata;
864472e9 2116 int ret;
1da177e4 2117
4a1c0893 2118 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2119 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2120 if (IS_ERR(opendata))
2121 return PTR_ERR(opendata);
864472e9 2122 ret = nfs4_open_recover(opendata, state);
35d05778 2123 if (ret == -ESTALE)
3d4ff43d 2124 d_drop(ctx->dentry);
c6d00e63 2125 nfs4_opendata_put(opendata);
864472e9 2126 return ret;
1da177e4
LT		 2127}
2128
a9ed2e25 2129static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2130{
539cd03a 2131 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2132 struct nfs4_exception exception = { };
2133 int err;
2134
2135 do {
539cd03a 2136 err = _nfs4_open_expired(ctx, state);
42113a75 2137 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2138 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2139 continue;
a9ed2e25
TM		 2140 switch (err) {
2141 default:
2142 goto out;
2143 case -NFS4ERR_GRACE:
2144 case -NFS4ERR_DELAY:
2145 nfs4_handle_exception(server, err, &exception);
2146 err = 0;
2147 }
202b50dc 2148 } while (exception.retry);
a9ed2e25 2149out:
202b50dc
TM		 2150 return err;
2151}
2152
1da177e4
LT		 2153static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2154{
1da177e4 2155 struct nfs_open_context *ctx;
864472e9 2156 int ret;
1da177e4 2157
864472e9
TM		 2158 ctx = nfs4_state_find_open_context(state);
2159 if (IS_ERR(ctx))
91876b13 2160 return -EAGAIN;
539cd03a 2161 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2162 put_nfs_open_context(ctx);
2163 return ret;
1da177e4
LT		 2164}
2165
4dfd4f7a
TM		 2166static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2167{
2168 nfs_remove_bad_delegation(state->inode);
2169 write_seqlock(&state->seqlock);
2170 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2171 write_sequnlock(&state->seqlock);
2172 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2173}
2174
2175static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2176{
2177 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2178 nfs_finish_clear_delegation_stateid(state);
2179}
2180
2181static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2182{
2183 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2184 nfs40_clear_delegation_stateid(state);
2185 return nfs4_open_expired(sp, state);
2186}
2187
f062eb6c 2188#if defined(CONFIG_NFS_V4_1)
0c116cad 2189static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2190{
f062eb6c 2191 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2192 nfs4_stateid stateid;
ab7cb0df 2193 struct nfs_delegation *delegation;
0c116cad
TM		 2194 struct rpc_cred *cred;
2195 int status;
3e60ffdd 2196
ab7cb0df
TM		 2197 /* Get the delegation credential for use by test/free_stateid */
2198 rcu_read_lock();
2199 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2200 if (delegation == NULL) {
ab7cb0df 2201 rcu_read_unlock();
0c116cad
TM		 2202 return;
2203 }
2204
2205 nfs4_stateid_copy(&stateid, &delegation->stateid);
2206 cred = get_rpccred(delegation->cred);
2207 rcu_read_unlock();
2208 status = nfs41_test_stateid(server, &stateid, cred);
2209 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2210
3e60ffdd
CL		 2211 if (status != NFS_OK) {
2212 /* Free the stateid unless the server explicitly
2213 * informs us the stateid is unrecognized. */
2214 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2215 nfs41_free_stateid(server, &stateid, cred);
2216 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2217 }
ab7cb0df 2218
0c116cad 2219 put_rpccred(cred);
3e60ffdd
CL		 2220}
2221
2222/**
2223 * nfs41_check_open_stateid - possibly free an open stateid
2224 *
2225 * @state: NFSv4 state for an inode
2226 *
2227 * Returns NFS_OK if recovery for this stateid is now finished.
2228 * Otherwise a negative NFS4ERR value is returned.
2229 */
2230static int nfs41_check_open_stateid(struct nfs4_state *state)
2231{
2232 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2233 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2234 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2235 int status;
2236
2237 /* If a state reset has been done, test_stateid is unneeded */
2238 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2239 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2240 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2241 return -NFS4ERR_BAD_STATEID;
2242
ab7cb0df 2243 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2244 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2245 if (status != NFS_OK) {
2246 /* Free the stateid unless the server explicitly
2247 * informs us the stateid is unrecognized. */
2248 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2249 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2250
2251 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2252 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2253 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2254 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2255 }
2256 return status;
2257}
2258
2259static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2260{
eb64cf96 2261 int status;
b01dd1d8 2262
0c116cad 2263 nfs41_check_delegation_stateid(state);
3e60ffdd 2264 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2265 if (status != NFS_OK)
2266 status = nfs4_open_expired(sp, state);
2267 return status;
f062eb6c
BS		 2268}
2269#endif
2270
aa53ed54
JL		 2271/*
2272 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2273 * fields corresponding to attributes that were used to store the verifier.
2274 * Make sure we clobber those fields in the later setattr call
2275 */
2276static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2277{
2278 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2279 !(sattr->ia_valid & ATTR_ATIME_SET))
2280 sattr->ia_valid |= ATTR_ATIME;
2281
2282 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2283 !(sattr->ia_valid & ATTR_MTIME_SET))
2284 sattr->ia_valid |= ATTR_MTIME;
2285}
2286
c21443c2
TM		 2287static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2288 fmode_t fmode,
2289 int flags,
3efb9722 2290 struct nfs_open_context *ctx)
c21443c2
TM		 2291{
2292 struct nfs4_state_owner *sp = opendata->owner;
2293 struct nfs_server *server = sp->so_server;
275bb307 2294 struct dentry *dentry;
c21443c2
TM		 2295 struct nfs4_state *state;
2296 unsigned int seq;
2297 int ret;
2298
2299 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2300
2301 ret = _nfs4_proc_open(opendata);
dca78001 2302 if (ret != 0)
c21443c2
TM		 2303 goto out;
2304
2305 state = nfs4_opendata_to_nfs4_state(opendata);
2306 ret = PTR_ERR(state);
2307 if (IS_ERR(state))
2308 goto out;
2309 if (server->caps & NFS_CAP_POSIX_LOCK)
2310 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2311
275bb307
TM		 2312 dentry = opendata->dentry;
2313 if (dentry->d_inode == NULL) {
2314 /* FIXME: Is this d_drop() ever needed? */
2315 d_drop(dentry);
2316 dentry = d_add_unique(dentry, igrab(state->inode));
2317 if (dentry == NULL) {
2318 dentry = opendata->dentry;
2319 } else if (dentry != ctx->dentry) {
2320 dput(ctx->dentry);
2321 ctx->dentry = dget(dentry);
2322 }
2323 nfs_set_verifier(dentry,
2324 nfs_save_change_attribute(opendata->dir->d_inode));
2325 }
2326
c21443c2
TM		 2327 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2328 if (ret != 0)
2329 goto out;
2330
3efb9722 2331 ctx->state = state;
c45ffdd2
TM		 2332 if (dentry->d_inode == state->inode) {
2333 nfs_inode_attach_open_context(ctx);
2334 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2335 nfs4_schedule_stateid_recovery(server, state);
2336 }
c21443c2
TM		 2337out:
2338 return ret;
2339}
2340
1da177e4 2341/*
24ac23ab 2342 * Returns a referenced nfs4_state
1da177e4 2343 */
82be417a 2344static int _nfs4_do_open(struct inode *dir,
4197a055 2345 struct nfs_open_context *ctx,
82be417a
AA		 2346 int flags,
2347 struct iattr *sattr,
5bc2afc2
TM		 2348 struct nfs4_label *label,
2349 int *opened)
1da177e4
LT		 2350{
2351 struct nfs4_state_owner *sp;
2352 struct nfs4_state *state = NULL;
2353 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2354 struct nfs4_opendata *opendata;
4197a055
TM		 2355 struct dentry *dentry = ctx->dentry;
2356 struct rpc_cred *cred = ctx->cred;
2357 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2358 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2359 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2360 struct nfs4_label *olabel = NULL;
aac00a8d 2361 int status;
1da177e4
LT		 2362
2363 /* Protect against reboot recovery conflicts */
1da177e4 2364 status = -ENOMEM;
d1e284d5
TM		 2365 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2366 if (sp == NULL) {
1da177e4
LT		 2367 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2368 goto out_err;
2369 }
58d9714a
TM		 2370 status = nfs4_recover_expired_lease(server);
2371 if (status != 0)
b4454fe1 2372 goto err_put_state_owner;
82a2c1b7
AV		 2373 if (dentry->d_inode != NULL)
2374 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2375 status = -ENOMEM;
49f9a0fa
TM		 2376 if (dentry->d_inode)
2377 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2378 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2379 label, claim, GFP_KERNEL);
e56e0b78 2380 if (opendata == NULL)
95d35cb4 2381 goto err_put_state_owner;
1da177e4 2382
14c43f76
DQ		 2383 if (label) {
2384 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2385 if (IS_ERR(olabel)) {
2386 status = PTR_ERR(olabel);
2387 goto err_opendata_put;
2388 }
2389 }
2390
e911b815
TM		 2391 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2392 if (!opendata->f_attr.mdsthreshold) {
2393 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2394 if (!opendata->f_attr.mdsthreshold)
2395 goto err_free_label;
2396 }
1549210f 2397 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2398 }
82a2c1b7
AV		 2399 if (dentry->d_inode != NULL)
2400 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2401
3efb9722 2402 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2403 if (status != 0)
14c43f76 2404 goto err_free_label;
3efb9722 2405 state = ctx->state;
6168f62c 2406
549b19cc
TM		 2407 if ((opendata->o_arg.open_flags & O_EXCL) &&
2408 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2409 nfs4_exclusive_attrset(opendata, sattr);
2410
2411 nfs_fattr_init(opendata->o_res.f_attr);
2412 status = nfs4_do_setattr(state->inode, cred,
2413 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2414 state, label, olabel);
2415 if (status == 0) {
0ab64e0e 2416 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2417 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2418 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2419 }
0ab64e0e 2420 }
5bc2afc2
TM		 2421 if (opendata->file_created)
2422 *opened |= FILE_CREATED;
82be417a 2423
e911b815 2424 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2425 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2426 opendata->f_attr.mdsthreshold = NULL;
2427 }
82be417a 2428
14c43f76
DQ		 2429 nfs4_label_free(olabel);
2430
c6d00e63 2431 nfs4_opendata_put(opendata);
1da177e4 2432 nfs4_put_state_owner(sp);
1da177e4 2433 return 0;
14c43f76
DQ		 2434err_free_label:
2435 nfs4_label_free(olabel);
c6d00e63
TM		 2436err_opendata_put:
2437 nfs4_opendata_put(opendata);
e56e0b78
TM		 2438err_put_state_owner:
2439 nfs4_put_state_owner(sp);
1da177e4 2440out_err:
1da177e4
LT		 2441 return status;
2442}
2443
2444
82be417a 2445static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2446 struct nfs_open_context *ctx,
82be417a
AA		 2447 int flags,
2448 struct iattr *sattr,
5bc2afc2
TM		 2449 struct nfs4_label *label,
2450 int *opened)
1da177e4 2451{
49f9a0fa 2452 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2453 struct nfs4_exception exception = { };
2454 struct nfs4_state *res;
2455 int status;
2456
2457 do {
5bc2afc2 2458 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2459 res = ctx->state;
42113a75 2460 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2461 if (status == 0)
2462 break;
2463 /* NOTE: BAD_SEQID means the server and client disagree about the
2464 * book-keeping w.r.t. state-changing operations
2465 * (OPEN/CLOSE/LOCK/LOCKU...)
2466 * It is actually a sign of a bug on the client or on the server.
2467 *
2468 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2469 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2470 * have unhashed the old state_owner for us, and that we can
2471 * therefore safely retry using a new one. We should still warn
2472 * the user though...
2473 */
2474 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2475 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2476 " returned a bad sequence-id error!\n",
2477 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2478 exception.retry = 1;
2479 continue;
2480 }
550f5747
TM		 2481 /*
2482 * BAD_STATEID on OPEN means that the server cancelled our
2483 * state before it received the OPEN_CONFIRM.
2484 * Recover by retrying the request as per the discussion
2485 * on Page 181 of RFC3530.
2486 */
2487 if (status == -NFS4ERR_BAD_STATEID) {
2488 exception.retry = 1;
2489 continue;
2490 }
aac00a8d
TM		 2491 if (status == -EAGAIN) {
2492 /* We must have found a delegation */
2493 exception.retry = 1;
2494 continue;
2495 }
49f9a0fa
TM		 2496 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2497 continue;
2498 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2499 status, &exception));
2500 } while (exception.retry);
2501 return res;
2502}
2503
659bfcd6
TM		 2504static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2505 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2506 struct nfs4_state *state, struct nfs4_label *ilabel,
2507 struct nfs4_label *olabel)
1da177e4 2508{
3e4f6290 2509 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2510 struct nfs_setattrargs arg = {
3e4f6290 2511 .fh = NFS_FH(inode),
1da177e4
LT		 2512 .iap = sattr,
2513 .server = server,
2514 .bitmask = server->attr_bitmask,
1775fd3e 2515 .label = ilabel,
1da177e4
LT		 2516 };
2517 struct nfs_setattrres res = {
2518 .fattr = fattr,
1775fd3e 2519 .label = olabel,
1da177e4
LT		 2520 .server = server,
2521 };
2522 struct rpc_message msg = {
659bfcd6
TM		 2523 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2524 .rpc_argp = &arg,
2525 .rpc_resp = &res,
2526 .rpc_cred = cred,
1da177e4 2527 };
26e976a8 2528 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2529 fmode_t fmode;
2530 bool truncate;
65e4308d 2531 int status;
1da177e4 2532
aa9c2669
DQ		 2533 arg.bitmask = nfs4_bitmask(server, ilabel);
2534 if (ilabel)
2535 arg.bitmask = nfs4_bitmask(server, olabel);
2536
0e574af1 2537 nfs_fattr_init(fattr);
1da177e4 2538
ee3ae84e
TM		 2539 /* Servers should only apply open mode checks for file size changes */
2540 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2541 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2542
2543 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2544 /* Use that stateid */
0418dae1 2545 } else if (truncate && state != NULL) {
2a369153
TM		 2546 struct nfs_lockowner lockowner = {
2547 .l_owner = current->files,
2548 .l_pid = current->tgid,
2549 };
0418dae1
TM		 2550 if (!nfs4_valid_open_stateid(state))
2551 return -EBADF;
2552 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2553 &lockowner) == -EIO)
2554 return -EBADF;
08e9eac4 2555 } else
f597c537 2556 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2557
7c513058 2558 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2559 if (status == 0 && state != NULL)
2560 renew_lease(server, timestamp);
65e4308d 2561 return status;
1da177e4
LT		 2562}
2563
659bfcd6
TM		 2564static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2565 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2566 struct nfs4_state *state, struct nfs4_label *ilabel,
2567 struct nfs4_label *olabel)
1da177e4 2568{
3e4f6290 2569 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2570 struct nfs4_exception exception = {
2571 .state = state,
3114ea7a 2572 .inode = inode,
a1d0b5ee 2573 };
1da177e4
LT		 2574 int err;
2575 do {
1775fd3e 2576 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2577 trace_nfs4_setattr(inode, err);
451146be
TM		 2578 switch (err) {
2579 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2580 if (!(sattr->ia_valid & ATTR_SIZE)) {
2581 pr_warn_once("NFSv4: server %s is incorrectly "
2582 "applying open mode checks to "
2583 "a SETATTR that is not "
2584 "changing file size.\n",
2585 server->nfs_client->cl_hostname);
2586 }
451146be
TM		 2587 if (state && !(state->state & FMODE_WRITE)) {
2588 err = -EBADF;
2589 if (sattr->ia_valid & ATTR_OPEN)
2590 err = -EACCES;
2591 goto out;
2592 }
2593 }
2594 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2595 } while (exception.retry);
451146be 2596out:
1da177e4
LT		 2597 return err;
2598}
2599
2600struct nfs4_closedata {
2601 struct inode *inode;
2602 struct nfs4_state *state;
2603 struct nfs_closeargs arg;
2604 struct nfs_closeres res;
516a6af6 2605 struct nfs_fattr fattr;
26e976a8 2606 unsigned long timestamp;
f7e8917a
FI		 2607 bool roc;
2608 u32 roc_barrier;
1da177e4
LT		 2609};
2610
963d8fe5 2611static void nfs4_free_closedata(void *data)
9512135d 2612{
963d8fe5
TM		 2613 struct nfs4_closedata *calldata = data;
2614 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2615 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2616
f7e8917a
FI		 2617 if (calldata->roc)
2618 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2619 nfs4_put_open_state(calldata->state);
2620 nfs_free_seqid(calldata->arg.seqid);
9512135d 2621 nfs4_put_state_owner(sp);
322b2b90 2622 nfs_sb_deactive(sb);
9512135d
TM		 2623 kfree(calldata);
2624}
2625
963d8fe5 2626static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2627{
963d8fe5 2628 struct nfs4_closedata *calldata = data;
1da177e4 2629 struct nfs4_state *state = calldata->state;
1da177e4 2630 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2631 nfs4_stateid *res_stateid = NULL;
1da177e4 2632
a3ca5651 2633 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2634 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2635 return;
42113a75 2636 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2637 /* hmm. we are done with the inode, and in the process of freeing
2638 * the state_owner. we keep this around to process errors
2639 */
1da177e4
LT		 2640 switch (task->tk_status) {
2641 case 0:
412f6c4c
TM		 2642 res_stateid = &calldata->res.stateid;
2643 if (calldata->arg.fmode == 0 && calldata->roc)
f7e8917a
FI		 2644 pnfs_roc_set_barrier(state->inode,
2645 calldata->roc_barrier);
26e976a8 2646 renew_lease(server, calldata->timestamp);
412f6c4c 2647 break;
69794ad7 2648 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2649 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2650 case -NFS4ERR_OLD_STATEID:
2651 case -NFS4ERR_BAD_STATEID:
1da177e4 2652 case -NFS4ERR_EXPIRED:
566fcec6
TM		 2653 if (!nfs4_stateid_match(&calldata->arg.stateid,
2654 &state->stateid)) {
2655 rpc_restart_call_prepare(task);
2656 goto out_release;
2657 }
dc0b027d 2658 if (calldata->arg.fmode == 0)
9e33bed5 2659 break;
1da177e4 2660 default:
8478eaa1 2661 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2662 rpc_restart_call_prepare(task);
69794ad7
TM		 2663 goto out_release;
2664 }
1da177e4 2665 }
412f6c4c 2666 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
69794ad7 2667out_release:
72211dbe 2668 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2669 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2670 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2671}
2672
4ce70ada 2673static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2674{
4ce70ada 2675 struct nfs4_closedata *calldata = data;
9512135d 2676 struct nfs4_state *state = calldata->state;
7fdab069 2677 struct inode *inode = calldata->inode;
aee7af35 2678 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2679 int call_close = 0;
9512135d 2680
a3ca5651 2681 dprintk("%s: begin!\n", __func__);
963d8fe5 2682 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2683 goto out_wait;
003707c7 2684
88069f77 2685 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2686 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2687 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2688 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2689 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
566fcec6 2690 nfs4_stateid_copy(&calldata->arg.stateid, &state->stateid);
003707c7 2691 /* Calculate the change in open mode */
cd9288ff 2692 calldata->arg.fmode = 0;
e7616923 2693 if (state->n_rdwr == 0) {
cd9288ff
TM		 2694 if (state->n_rdonly == 0)
2695 call_close |= is_rdonly;
2696 else if (is_rdonly)
2697 calldata->arg.fmode |= FMODE_READ;
2698 if (state->n_wronly == 0)
2699 call_close |= is_wronly;
2700 else if (is_wronly)
2701 calldata->arg.fmode |= FMODE_WRITE;
2702 } else if (is_rdwr)
2703 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2704
2705 if (calldata->arg.fmode == 0)
2706 call_close |= is_rdwr;
2707
5d422301
TM		 2708 if (!nfs4_valid_open_stateid(state))
2709 call_close = 0;
4cecb76f 2710 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2711
2712 if (!call_close) {
963d8fe5 2713 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2714 goto out_no_action;
9512135d 2715 }
88069f77 2716
f7e8917a 2717 if (calldata->arg.fmode == 0) {
88069f77 2718 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2719 if (calldata->roc &&
b9536ad5
AA		 2720 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2721 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2722 goto out_wait;
b9536ad5 2723 }
f7e8917a 2724 }
6ae37339
TM		 2725 calldata->arg.share_access =
2726 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2727 calldata->arg.fmode, 0);
88069f77 2728
516a6af6 2729 nfs_fattr_init(calldata->res.fattr);
26e976a8 2730 calldata->timestamp = jiffies;
7fdab069 2731 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2732 &calldata->arg.seq_args,
2733 &calldata->res.seq_res,
2240a9e2
TM		 2734 task) != 0)
2735 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2736 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2737 return;
2738out_no_action:
2739 task->tk_action = NULL;
2740out_wait:
2741 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2742}
2743
963d8fe5 2744static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2745 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2746 .rpc_call_done = nfs4_close_done,
2747 .rpc_release = nfs4_free_closedata,
2748};
2749
fe08c546
PT		 2750static bool nfs4_roc(struct inode *inode)
2751{
40dd4b7a 2752 if (!nfs_have_layout(inode))
fe08c546 2753 return false;
fe08c546
PT		 2754 return pnfs_roc(inode);
2755}
2756
1da177e4
LT		 2757/*
2758 * It is possible for data to be read/written from a mem-mapped file
2759 * after the sys_close call (which hits the vfs layer as a flush).
2760 * This means that we can't safely call nfsv4 close on a file until
2761 * the inode is cleared. This in turn means that we are not good
2762 * NFSv4 citizens - we do not indicate to the server to update the file's
2763 * share state even when we are done with one of the three share
2764 * stateid's in the inode.
2765 *
2766 * NOTE: Caller must be holding the sp->so_owner semaphore!
2767 */
1f7977c1 2768int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2769{
4a35bd41 2770 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 2771 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 2772 struct nfs4_closedata *calldata;
b39e625b
TM		 2773 struct nfs4_state_owner *sp = state->owner;
2774 struct rpc_task *task;
5138fde0
TM		 2775 struct rpc_message msg = {
2776 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2777 .rpc_cred = state->owner->so_cred,
2778 };
c970aa85
TM		 2779 struct rpc_task_setup task_setup_data = {
2780 .rpc_client = server->client,
5138fde0 2781 .rpc_message = &msg,
c970aa85 2782 .callback_ops = &nfs4_close_ops,
101070ca 2783 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2784 .flags = RPC_TASK_ASYNC,
2785 };
9512135d 2786 int status = -ENOMEM;
1da177e4 2787
fa940720
WAA		 2788 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2789 &task_setup_data.rpc_client, &msg);
2790
8535b2be 2791 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2792 if (calldata == NULL)
9512135d 2793 goto out;
a9c92d6b 2794 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2795 calldata->inode = state->inode;
1da177e4 2796 calldata->state = state;
4a35bd41 2797 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 2798 /* Serialization for the sequence id */
63f5f796
TM		 2799 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2800 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 2801 if (IS_ERR(calldata->arg.seqid))
9512135d 2802 goto out_free_calldata;
dc0b027d 2803 calldata->arg.fmode = 0;
a65318bf 2804 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2805 calldata->res.fattr = &calldata->fattr;
c1d51931 2806 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2807 calldata->res.server = server;
fe08c546 2808 calldata->roc = nfs4_roc(state->inode);
643168c2 2809 nfs_sb_active(calldata->inode->i_sb);
9512135d 2810
1174dd1f
TM		 2811 msg.rpc_argp = &calldata->arg;
2812 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2813 task_setup_data.callback_data = calldata;
2814 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2815 if (IS_ERR(task))
2816 return PTR_ERR(task);
a49c3c77
TM		 2817 status = 0;
2818 if (wait)
2819 status = rpc_wait_for_completion_task(task);
b39e625b 2820 rpc_put_task(task);
a49c3c77 2821 return status;
9512135d
TM		 2822out_free_calldata:
2823 kfree(calldata);
2824out:
b39e625b
TM		 2825 nfs4_put_open_state(state);
2826 nfs4_put_state_owner(sp);
9512135d 2827 return status;
1da177e4
LT		 2828}
2829
2b484297 2830static struct inode *
5bc2afc2
TM		 2831nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2832 int open_flags, struct iattr *attr, int *opened)
1da177e4 2833{
1da177e4 2834 struct nfs4_state *state;
aa9c2669
DQ		 2835 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2836
2837 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2838
565277f6 2839 /* Protect against concurrent sillydeletes */
5bc2afc2 2840 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2841
2842 nfs4_label_release_security(label);
2843
f46e0bd3
TM		 2844 if (IS_ERR(state))
2845 return ERR_CAST(state);
275bb307 2846 return state->inode;
1da177e4
LT		 2847}
2848
1185a552 2849static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2850{
2851 if (ctx->state == NULL)
2852 return;
2853 if (is_sync)
643168c2 2854 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2855 else
643168c2 2856 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2857}
1da177e4 2858
b944dba3
TM		 2859#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2860#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2861#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2862
1da177e4
LT		 2863static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2864{
43652ad5
BH		 2865 struct nfs4_server_caps_arg args = {
2866 .fhandle = fhandle,
2867 };
1da177e4
LT		 2868 struct nfs4_server_caps_res res = {};
2869 struct rpc_message msg = {
2870 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2871 .rpc_argp = &args,
1da177e4
LT		 2872 .rpc_resp = &res,
2873 };
2874 int status;
2875
7c513058 2876 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2877 if (status == 0) {
b944dba3
TM		 2878 /* Sanity check the server answers */
2879 switch (server->nfs_client->cl_minorversion) {
2880 case 0:
2881 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2882 res.attr_bitmask[2] = 0;
2883 break;
2884 case 1:
2885 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2886 break;
2887 case 2:
2888 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2889 }
1da177e4 2890 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2891 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2892 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2893 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2894 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2895 NFS_CAP_CTIME|NFS_CAP_MTIME|
2896 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2897 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2898 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2899 server->caps |= NFS_CAP_ACLS;
2900 if (res.has_links != 0)
2901 server->caps |= NFS_CAP_HARDLINKS;
2902 if (res.has_symlinks != 0)
2903 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2904 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2905 server->caps |= NFS_CAP_FILEID;
2906 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2907 server->caps |= NFS_CAP_MODE;
2908 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2909 server->caps |= NFS_CAP_NLINK;
2910 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2911 server->caps |= NFS_CAP_OWNER;
2912 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2913 server->caps |= NFS_CAP_OWNER_GROUP;
2914 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2915 server->caps |= NFS_CAP_ATIME;
2916 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2917 server->caps |= NFS_CAP_CTIME;
2918 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2919 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2920#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2921 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2922 server->caps |= NFS_CAP_SECURITY_LABEL;
2923#endif
2924 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2925 sizeof(server->attr_bitmask));
b944dba3 2926 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2927
a65318bf
TM		 2928 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2929 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2930 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2931 server->cache_consistency_bitmask[2] = 0;
1da177e4 2932 server->acl_bitmask = res.acl_bitmask;
264e6351 2933 server->fh_expire_type = res.fh_expire_type;
1da177e4 2934 }
cccef3b9 2935
1da177e4
LT		 2936 return status;
2937}
2938
55a97593 2939int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2940{
2941 struct nfs4_exception exception = { };
2942 int err;
2943 do {
2944 err = nfs4_handle_exception(server,
2945 _nfs4_server_capabilities(server, fhandle),
2946 &exception);
2947 } while (exception.retry);
2948 return err;
2949}
2950
2951static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2952 struct nfs_fsinfo *info)
2953{
aa9c2669 2954 u32 bitmask[3];
1da177e4 2955 struct nfs4_lookup_root_arg args = {
aa9c2669 2956 .bitmask = bitmask,
1da177e4
LT		 2957 };
2958 struct nfs4_lookup_res res = {
2959 .server = server,
0e574af1 2960 .fattr = info->fattr,
1da177e4
LT		 2961 .fh = fhandle,
2962 };
2963 struct rpc_message msg = {
2964 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2965 .rpc_argp = &args,
2966 .rpc_resp = &res,
2967 };
008f55d0 2968
aa9c2669
DQ		 2969 bitmask[0] = nfs4_fattr_bitmap[0];
2970 bitmask[1] = nfs4_fattr_bitmap[1];
2971 /*
2972 * Process the label in the upcoming getfattr
2973 */
2974 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2975
0e574af1 2976 nfs_fattr_init(info->fattr);
7c513058 2977 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2978}
2979
2980static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2981 struct nfs_fsinfo *info)
2982{
2983 struct nfs4_exception exception = { };
2984 int err;
2985 do {
fb8a5ba8 2986 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2987 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2988 switch (err) {
2989 case 0:
2990 case -NFS4ERR_WRONGSEC:
05e9cfb4 2991 goto out;
fb8a5ba8
BS		 2992 default:
2993 err = nfs4_handle_exception(server, err, &exception);
2994 }
1da177e4 2995 } while (exception.retry);
05e9cfb4 2996out:
1da177e4
LT		 2997 return err;
2998}
2999
8f70e95f
BS		 3000static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3001 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3002{
c2190661
TM		 3003 struct rpc_auth_create_args auth_args = {
3004 .pseudoflavor = flavor,
3005 };
8f70e95f
BS		 3006 struct rpc_auth *auth;
3007 int ret;
3008
c2190661 3009 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3010 if (IS_ERR(auth)) {
75bc8821 3011 ret = -EACCES;
8f70e95f
BS		 3012 goto out;
3013 }
3014 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3015out:
3016 return ret;
3017}
3018
9a744ba3
CL		 3019/*
3020 * Retry pseudoroot lookup with various security flavors. We do this when:
3021 *
3022 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3023 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3024 *
3025 * Returns zero on success, or a negative NFS4ERR value, or a
3026 * negative errno value.
3027 */
801a16dc 3028static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3029 struct nfs_fsinfo *info)
1da177e4 3030{
9a744ba3
CL		 3031 /* Per 3530bis 15.33.5 */
3032 static const rpc_authflavor_t flav_array[] = {
3033 RPC_AUTH_GSS_KRB5P,
3034 RPC_AUTH_GSS_KRB5I,
3035 RPC_AUTH_GSS_KRB5,
c4eafe11 3036 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3037 RPC_AUTH_NULL,
3038 };
3039 int status = -EPERM;
3040 size_t i;
6a1a1e34 3041
4d4b69dd
WAA		 3042 if (server->auth_info.flavor_len > 0) {
3043 /* try each flavor specified by user */
3044 for (i = 0; i < server->auth_info.flavor_len; i++) {
3045 status = nfs4_lookup_root_sec(server, fhandle, info,
3046 server->auth_info.flavors[i]);
3047 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3048 continue;
3049 break;
3050 }
3051 } else {
3052 /* no flavors specified by user, try default list */
3053 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3054 status = nfs4_lookup_root_sec(server, fhandle, info,
3055 flav_array[i]);
3056 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3057 continue;
3058 break;
3059 }
8f70e95f 3060 }
9a744ba3 3061
fb8a5ba8
BS		 3062 /*
3063 * -EACCESS could mean that the user doesn't have correct permissions
3064 * to access the mount. It could also mean that we tried to mount
3065 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3066 * existing mount programs don't handle -EACCES very well so it should
3067 * be mapped to -EPERM instead.
3068 */
3069 if (status == -EACCES)
3070 status = -EPERM;
801a16dc
BS		 3071 return status;
3072}
3073
2ed4b95b
CL		 3074static int nfs4_do_find_root_sec(struct nfs_server *server,
3075 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3076{
3077 int mv = server->nfs_client->cl_minorversion;
3078 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3079}
3080
3081/**
3082 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3083 * @server: initialized nfs_server handle
3084 * @fhandle: we fill in the pseudo-fs root file handle
3085 * @info: we fill in an FSINFO struct
5e6b1990 3086 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3087 *
3088 * Returns zero on success, or a negative errno.
801a16dc 3089 */
3028eb2b 3090int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3091 struct nfs_fsinfo *info,
3092 bool auth_probe)
801a16dc 3093{
2ed4b95b
CL		 3094 int status;
3095
5e6b1990
TM		 3096 switch (auth_probe) {
3097 case false:
3098 status = nfs4_lookup_root(server, fhandle, info);
3099 if (status != -NFS4ERR_WRONGSEC)
3100 break;
5e6b1990 3101 default:
2ed4b95b 3102 status = nfs4_do_find_root_sec(server, fhandle, info);
5e6b1990 3103 }
2ed4b95b 3104
1da177e4
LT		 3105 if (status == 0)
3106 status = nfs4_server_capabilities(server, fhandle);
3107 if (status == 0)
3108 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3109
c12e87f4 3110 return nfs4_map_errors(status);
1da177e4
LT		 3111}
3112
bae36241
BS		 3113static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3114 struct nfs_fsinfo *info)
3115{
3116 int error;
3117 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3118 struct nfs4_label *label = NULL;
bae36241
BS		 3119
3120 error = nfs4_server_capabilities(server, mntfh);
3121 if (error < 0) {
3122 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3123 return error;
3124 }
3125
14c43f76
DQ		 3126 label = nfs4_label_alloc(server, GFP_KERNEL);
3127 if (IS_ERR(label))
3128 return PTR_ERR(label);
3129
1775fd3e 3130 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3131 if (error < 0) {
3132 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3133 goto err_free_label;
bae36241
BS		 3134 }
3135
3136 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3137 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3138 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3139
14c43f76
DQ		 3140err_free_label:
3141 nfs4_label_free(label);
3142
bae36241
BS		 3143 return error;
3144}
3145
6b97fd3d
MN		 3146/*
3147 * Get locations and (maybe) other attributes of a referral.
3148 * Note that we'll actually follow the referral later when
3149 * we detect fsid mismatch in inode revalidation
3150 */
f05d147f
BS		 3151static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3152 const struct qstr *name, struct nfs_fattr *fattr,
3153 struct nfs_fh *fhandle)
6b97fd3d
MN		 3154{
3155 int status = -ENOMEM;
3156 struct page *page = NULL;
3157 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3158
3159 page = alloc_page(GFP_KERNEL);
3160 if (page == NULL)
3161 goto out;
3162 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3163 if (locations == NULL)
3164 goto out;
3165
f05d147f 3166 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3167 if (status != 0)
3168 goto out;
519ae255
CL		 3169
3170 /*
3171 * If the fsid didn't change, this is a migration event, not a
3172 * referral. Cause us to drop into the exception handler, which
3173 * will kick off migration recovery.
3174 */
6b97fd3d 3175 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3176 dprintk("%s: server did not return a different fsid for"
3177 " a referral at %s\n", __func__, name->name);
519ae255 3178 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3179 goto out;
3180 }
533eb461
AA		 3181 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3182 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3183
533eb461 3184 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3185 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3186 memset(fhandle, 0, sizeof(struct nfs_fh));
3187out:
3188 if (page)
3189 __free_page(page);
5d7ca35a 3190 kfree(locations);
6b97fd3d
MN		 3191 return status;
3192}
3193
1775fd3e
DQ		 3194static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3195 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3196{
3197 struct nfs4_getattr_arg args = {
3198 .fh = fhandle,
3199 .bitmask = server->attr_bitmask,
3200 };
3201 struct nfs4_getattr_res res = {
3202 .fattr = fattr,
1775fd3e 3203 .label = label,
1da177e4
LT		 3204 .server = server,
3205 };
3206 struct rpc_message msg = {
3207 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3208 .rpc_argp = &args,
3209 .rpc_resp = &res,
3210 };
aa9c2669
DQ		 3211
3212 args.bitmask = nfs4_bitmask(server, label);
3213
0e574af1 3214 nfs_fattr_init(fattr);
7c513058 3215 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3216}
3217
1775fd3e
DQ		 3218static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3219 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3220{
3221 struct nfs4_exception exception = { };
3222 int err;
3223 do {
b5f875a9
TM		 3224 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3225 trace_nfs4_getattr(server, fhandle, fattr, err);
3226 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3227 &exception);
3228 } while (exception.retry);
3229 return err;
3230}
3231
3232/*
3233 * The file is not closed if it is opened due to the a request to change
3234 * the size of the file. The open call will not be needed once the
3235 * VFS layer lookup-intents are implemented.
3236 *
3237 * Close is called when the inode is destroyed.
3238 * If we haven't opened the file for O_WRONLY, we
3239 * need to in the size_change case to obtain a stateid.
3240 *
3241 * Got race?
3242 * Because OPEN is always done by name in nfsv4, it is
3243 * possible that we opened a different file by the same
3244 * name. We can recognize this race condition, but we
3245 * can't do anything about it besides returning an error.
3246 *
3247 * This will be fixed with VFS changes (lookup-intent).
3248 */
3249static int
3250nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3251 struct iattr *sattr)
3252{
08e9eac4 3253 struct inode *inode = dentry->d_inode;
659bfcd6 3254 struct rpc_cred *cred = NULL;
d530838b 3255 struct nfs4_state *state = NULL;
14c43f76 3256 struct nfs4_label *label = NULL;
1da177e4
LT		 3257 int status;
3258
88ac815c
PT		 3259 if (pnfs_ld_layoutret_on_setattr(inode) &&
3260 sattr->ia_valid & ATTR_SIZE &&
3261 sattr->ia_size < i_size_read(inode))
24028672 3262 pnfs_commit_and_return_layout(inode);
8a1636c4 3263
0e574af1 3264 nfs_fattr_init(fattr);
1da177e4 3265
2669940d
AA		 3266 /* Deal with open(O_TRUNC) */
3267 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3268 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3269
3270 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3271 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3272 return 0;
3273
d530838b 3274 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3275 if (sattr->ia_valid & ATTR_FILE) {
3276 struct nfs_open_context *ctx;
3277
3278 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3279 if (ctx) {
3280 cred = ctx->cred;
3281 state = ctx->state;
3282 }
659bfcd6 3283 }
08e9eac4 3284
14c43f76
DQ		 3285 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3286 if (IS_ERR(label))
3287 return PTR_ERR(label);
3288
3289 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3290 if (status == 0) {
65e4308d 3291 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 3292 nfs_setsecurity(inode, fattr, label);
3293 }
14c43f76 3294 nfs4_label_free(label);
1da177e4
LT		 3295 return status;
3296}
3297
0c2e53f1
TM		 3298static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3299 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3300 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3301{
0c2e53f1 3302 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3303 int status;
3304 struct nfs4_lookup_arg args = {
3305 .bitmask = server->attr_bitmask,
0c2e53f1 3306 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3307 .name = name,
3308 };
3309 struct nfs4_lookup_res res = {
3310 .server = server,
3311 .fattr = fattr,
aa9c2669 3312 .label = label,
2b3de441
DH		 3313 .fh = fhandle,
3314 };
3315 struct rpc_message msg = {
3316 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3317 .rpc_argp = &args,
3318 .rpc_resp = &res,
3319 };
3320
aa9c2669
DQ		 3321 args.bitmask = nfs4_bitmask(server, label);
3322
2b3de441
DH		 3323 nfs_fattr_init(fattr);
3324
1da177e4 3325 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3326 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3327 dprintk("NFS reply lookup: %d\n", status);
3328 return status;
3329}
3330
72de53ec 3331static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3332{
7ebb9315 3333 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3334 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3335 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3336 fattr->nlink = 2;
3337}
3338
72de53ec
BS		 3339static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3340 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3341 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3342{
3343 struct nfs4_exception exception = { };
72de53ec 3344 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3345 int err;
3346 do {
1775fd3e 3347 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3348 trace_nfs4_lookup(dir, name, err);
72de53ec 3349 switch (err) {
08ef7bd3 3350 case -NFS4ERR_BADNAME:
72de53ec
BS		 3351 err = -ENOENT;
3352 goto out;
0c2e53f1 3353 case -NFS4ERR_MOVED:
f05d147f 3354 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3355 goto out;
0c2e53f1 3356 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3357 err = -EPERM;
3358 if (client != *clnt)
3359 goto out;
66b06860 3360 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3361 if (IS_ERR(client))
3362 return PTR_ERR(client);
3363
3364 exception.retry = 1;
3365 break;
3366 default:
3367 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3368 }
1da177e4 3369 } while (exception.retry);
72de53ec
BS		 3370
3371out:
3372 if (err == 0)
3373 *clnt = client;
3374 else if (client != *clnt)
3375 rpc_shutdown_client(client);
3376
1da177e4
LT		 3377 return err;
3378}
3379
80a16b21 3380static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3381 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3382 struct nfs4_label *label)
72de53ec
BS		 3383{
3384 int status;
3385 struct rpc_clnt *client = NFS_CLIENT(dir);
3386
1775fd3e 3387 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3388 if (client != NFS_CLIENT(dir)) {
3389 rpc_shutdown_client(client);
3390 nfs_fixup_secinfo_attributes(fattr);
3391 }
3392 return status;
3393}
3394
f05d147f
BS		 3395struct rpc_clnt *
3396nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3397 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3398{
b72888cb 3399 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3400 int status;
f05d147f 3401
1775fd3e 3402 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3403 if (status < 0)
f05d147f 3404 return ERR_PTR(status);
b72888cb 3405 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3406}
3407
1da177e4
LT		 3408static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3409{
76b32999 3410 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3411 struct nfs4_accessargs args = {
3412 .fh = NFS_FH(inode),
a4980e78 3413 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3414 };
3415 struct nfs4_accessres res = {
3416 .server = server,
1da177e4 3417 };
1da177e4
LT		 3418 struct rpc_message msg = {
3419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3420 .rpc_argp = &args,
3421 .rpc_resp = &res,
3422 .rpc_cred = entry->cred,
3423 };
3424 int mode = entry->mask;
aa9c2669 3425 int status = 0;
1da177e4
LT		 3426
3427 /*
3428 * Determine which access bits we want to ask for...
3429 */
3430 if (mode & MAY_READ)
3431 args.access |= NFS4_ACCESS_READ;
3432 if (S_ISDIR(inode->i_mode)) {
3433 if (mode & MAY_WRITE)
3434 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3435 if (mode & MAY_EXEC)
3436 args.access |= NFS4_ACCESS_LOOKUP;
3437 } else {
3438 if (mode & MAY_WRITE)
3439 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3440 if (mode & MAY_EXEC)
3441 args.access |= NFS4_ACCESS_EXECUTE;
3442 }
c407d41a
TM		 3443
3444 res.fattr = nfs_alloc_fattr();
3445 if (res.fattr == NULL)
3446 return -ENOMEM;
3447
7c513058 3448 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3449 if (!status) {
6168f62c 3450 nfs_access_set_mask(entry, res.access);
c407d41a 3451 nfs_refresh_inode(inode, res.fattr);
1da177e4 3452 }
c407d41a 3453 nfs_free_fattr(res.fattr);
1da177e4
LT		 3454 return status;
3455}
3456
3457static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3458{
3459 struct nfs4_exception exception = { };
3460 int err;
3461 do {
c1578b76
TM		 3462 err = _nfs4_proc_access(inode, entry);
3463 trace_nfs4_access(inode, err);
3464 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3465 &exception);
3466 } while (exception.retry);
3467 return err;
3468}
3469
3470/*
3471 * TODO: For the time being, we don't try to get any attributes
3472 * along with any of the zero-copy operations READ, READDIR,
3473 * READLINK, WRITE.
3474 *
3475 * In the case of the first three, we want to put the GETATTR
3476 * after the read-type operation -- this is because it is hard
3477 * to predict the length of a GETATTR response in v4, and thus
3478 * align the READ data correctly. This means that the GETATTR
3479 * may end up partially falling into the page cache, and we should
3480 * shift it into the 'tail' of the xdr_buf before processing.
3481 * To do this efficiently, we need to know the total length
3482 * of data received, which doesn't seem to be available outside
3483 * of the RPC layer.
3484 *
3485 * In the case of WRITE, we also want to put the GETATTR after
3486 * the operation -- in this case because we want to make sure
140150db 3487 * we get the post-operation mtime and size.
1da177e4
LT		 3488 *
3489 * Both of these changes to the XDR layer would in fact be quite
3490 * minor, but I decided to leave them for a subsequent patch.
3491 */
3492static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3493 unsigned int pgbase, unsigned int pglen)
3494{
3495 struct nfs4_readlink args = {
3496 .fh = NFS_FH(inode),
3497 .pgbase = pgbase,
3498 .pglen = pglen,
3499 .pages = &page,
3500 };
f50c7000 3501 struct nfs4_readlink_res res;
1da177e4
LT		 3502 struct rpc_message msg = {
3503 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3504 .rpc_argp = &args,
f50c7000 3505 .rpc_resp = &res,
1da177e4
LT		 3506 };
3507
7c513058 3508 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3509}
3510
3511static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3512 unsigned int pgbase, unsigned int pglen)
3513{
3514 struct nfs4_exception exception = { };
3515 int err;
3516 do {
c1578b76
TM		 3517 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3518 trace_nfs4_readlink(inode, err);
3519 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3520 &exception);
3521 } while (exception.retry);
3522 return err;
3523}
3524
1da177e4 3525/*
8867fe58 3526 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3527 */
1da177e4
LT		 3528static int
3529nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3530 int flags)
1da177e4 3531{
aa9c2669 3532 struct nfs4_label l, *ilabel = NULL;
8867fe58 3533 struct nfs_open_context *ctx;
1da177e4 3534 struct nfs4_state *state;
5bc2afc2 3535 int opened = 0;
1da177e4
LT		 3536 int status = 0;
3537
8867fe58
MS		 3538 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3539 if (IS_ERR(ctx))
3540 return PTR_ERR(ctx);
3541
aa9c2669
DQ		 3542 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3543
a8a5da99 3544 sattr->ia_mode &= ~current_umask();
5bc2afc2 3545 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3546 if (IS_ERR(state)) {
3547 status = PTR_ERR(state);
c0204fd2 3548 goto out;
1da177e4 3549 }
1da177e4 3550out:
aa9c2669 3551 nfs4_label_release_security(ilabel);
8867fe58 3552 put_nfs_open_context(ctx);
1da177e4
LT		 3553 return status;
3554}
3555
3556static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3557{
16e42959 3558 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3559 struct nfs_removeargs args = {
1da177e4 3560 .fh = NFS_FH(dir),
26fe5750 3561 .name = *name,
16e42959 3562 };
4fdc17b2 3563 struct nfs_removeres res = {
16e42959 3564 .server = server,
1da177e4 3565 };
1da177e4 3566 struct rpc_message msg = {
4fdc17b2
TM		 3567 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3568 .rpc_argp = &args,
3569 .rpc_resp = &res,
1da177e4 3570 };
778d2817 3571 int status;
1da177e4 3572
7c513058 3573 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3574 if (status == 0)
16e42959 3575 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3576 return status;
3577}
3578
3579static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3580{
3581 struct nfs4_exception exception = { };
3582 int err;
3583 do {
078ea3df
TM		 3584 err = _nfs4_proc_remove(dir, name);
3585 trace_nfs4_remove(dir, name, err);
3586 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3587 &exception);
3588 } while (exception.retry);
3589 return err;
3590}
3591
e4eff1a6 3592static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3593{
e4eff1a6
TM		 3594 struct nfs_server *server = NFS_SERVER(dir);
3595 struct nfs_removeargs *args = msg->rpc_argp;
3596 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3597
e4eff1a6 3598 res->server = server;
1da177e4 3599 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3600 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3601
3602 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3603}
3604
34e137cc
BS		 3605static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3606{
d9afbd1b
TM		 3607 nfs4_setup_sequence(NFS_SERVER(data->dir),
3608 &data->args.seq_args,
3609 &data->res.seq_res,
3610 task);
1da177e4
LT		 3611}
3612
e4eff1a6 3613static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3614{
078ea3df
TM		 3615 struct nfs_unlinkdata *data = task->tk_calldata;
3616 struct nfs_removeres *res = &data->res;
e4eff1a6 3617
14516c3a
TM		 3618 if (!nfs4_sequence_done(task, &res->seq_res))
3619 return 0;
8478eaa1
N		 3620 if (nfs4_async_handle_error(task, res->server, NULL,
3621 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3622 return 0;
3623 update_changeattr(dir, &res->cinfo);
e4eff1a6 3624 return 1;
1da177e4
LT		 3625}
3626
d3d4152a
JL		 3627static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3628{
3629 struct nfs_server *server = NFS_SERVER(dir);
3630 struct nfs_renameargs *arg = msg->rpc_argp;
3631 struct nfs_renameres *res = msg->rpc_resp;
3632
3633 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3634 res->server = server;
a9c92d6b 3635 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3636}
3637
c6bfa1a1
BS		 3638static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3639{
d9afbd1b
TM		 3640 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3641 &data->args.seq_args,
3642 &data->res.seq_res,
3643 task);
d3d4152a
JL		 3644}
3645
3646static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3647 struct inode *new_dir)
3648{
fbc6f7c2
TM		 3649 struct nfs_renamedata *data = task->tk_calldata;
3650 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3651
3652 if (!nfs4_sequence_done(task, &res->seq_res))
3653 return 0;
8478eaa1 3654 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3655 return 0;
3656
3657 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3658 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3659 return 1;
3660}
3661
1da177e4
LT		 3662static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3663{
91ba2eee 3664 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3665 struct nfs4_link_arg arg = {
3666 .fh = NFS_FH(inode),
3667 .dir_fh = NFS_FH(dir),
3668 .name = name,
91ba2eee
TM		 3669 .bitmask = server->attr_bitmask,
3670 };
91ba2eee
TM		 3671 struct nfs4_link_res res = {
3672 .server = server,
1775fd3e 3673 .label = NULL,
1da177e4 3674 };
1da177e4
LT		 3675 struct rpc_message msg = {
3676 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3677 .rpc_argp = &arg,
91ba2eee 3678 .rpc_resp = &res,
1da177e4 3679 };
136f2627
TM		 3680 int status = -ENOMEM;
3681
3682 res.fattr = nfs_alloc_fattr();
778d2817 3683 if (res.fattr == NULL)
136f2627 3684 goto out;
1da177e4 3685
14c43f76
DQ		 3686 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3687 if (IS_ERR(res.label)) {
3688 status = PTR_ERR(res.label);
3689 goto out;
3690 }
aa9c2669 3691 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3692
7c513058 3693 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3694 if (!status) {
3695 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3696 status = nfs_post_op_update_inode(inode, res.fattr);
3697 if (!status)
3698 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3699 }
14c43f76
DQ		 3700
3701
3702 nfs4_label_free(res.label);
3703
136f2627 3704out:
136f2627 3705 nfs_free_fattr(res.fattr);
1da177e4
LT		 3706 return status;
3707}
3708
3709static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3710{
3711 struct nfs4_exception exception = { };
3712 int err;
3713 do {
3714 err = nfs4_handle_exception(NFS_SERVER(inode),
3715 _nfs4_proc_link(inode, dir, name),
3716 &exception);
3717 } while (exception.retry);
3718 return err;
3719}
3720
57dc9a57
TM		 3721struct nfs4_createdata {
3722 struct rpc_message msg;
3723 struct nfs4_create_arg arg;
3724 struct nfs4_create_res res;
3725 struct nfs_fh fh;
3726 struct nfs_fattr fattr;
1775fd3e 3727 struct nfs4_label *label;
57dc9a57
TM		 3728};
3729
3730static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3731 struct qstr *name, struct iattr *sattr, u32 ftype)
3732{
3733 struct nfs4_createdata *data;
3734
3735 data = kzalloc(sizeof(*data), GFP_KERNEL);
3736 if (data != NULL) {
3737 struct nfs_server *server = NFS_SERVER(dir);
3738
14c43f76
DQ		 3739 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3740 if (IS_ERR(data->label))
3741 goto out_free;
3742
57dc9a57
TM		 3743 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3744 data->msg.rpc_argp = &data->arg;
3745 data->msg.rpc_resp = &data->res;
3746 data->arg.dir_fh = NFS_FH(dir);
3747 data->arg.server = server;
3748 data->arg.name = name;
3749 data->arg.attrs = sattr;
3750 data->arg.ftype = ftype;
aa9c2669 3751 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3752 data->res.server = server;
3753 data->res.fh = &data->fh;
3754 data->res.fattr = &data->fattr;
1775fd3e 3755 data->res.label = data->label;
57dc9a57 3756 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3757 }
3758 return data;
14c43f76
DQ		 3759out_free:
3760 kfree(data);
3761 return NULL;
57dc9a57
TM		 3762}
3763
3764static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3765{
7c513058 3766 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3767 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3768 if (status == 0) {
3769 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3770 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3771 }
3772 return status;
3773}
3774
3775static void nfs4_free_createdata(struct nfs4_createdata *data)
3776{
14c43f76 3777 nfs4_label_free(data->label);
57dc9a57
TM		 3778 kfree(data);
3779}
3780
4f390c15 3781static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3782 struct page *page, unsigned int len, struct iattr *sattr,
3783 struct nfs4_label *label)
1da177e4 3784{
57dc9a57
TM		 3785 struct nfs4_createdata *data;
3786 int status = -ENAMETOOLONG;
1da177e4 3787
94a6d753 3788 if (len > NFS4_MAXPATHLEN)
57dc9a57 3789 goto out;
4f390c15 3790
57dc9a57
TM		 3791 status = -ENOMEM;
3792 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3793 if (data == NULL)
3794 goto out;
3795
3796 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3797 data->arg.u.symlink.pages = &page;
3798 data->arg.u.symlink.len = len;
1775fd3e 3799 data->arg.label = label;
1da177e4 3800
57dc9a57
TM		 3801 status = nfs4_do_create(dir, dentry, data);
3802
3803 nfs4_free_createdata(data);
3804out:
1da177e4
LT		 3805 return status;
3806}
3807
4f390c15 3808static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3809 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3810{
3811 struct nfs4_exception exception = { };
aa9c2669 3812 struct nfs4_label l, *label = NULL;
1da177e4 3813 int err;
aa9c2669
DQ		 3814
3815 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3816
1da177e4 3817 do {
078ea3df
TM		 3818 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3819 trace_nfs4_symlink(dir, &dentry->d_name, err);
3820 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3821 &exception);
3822 } while (exception.retry);
aa9c2669
DQ		 3823
3824 nfs4_label_release_security(label);
1da177e4
LT		 3825 return err;
3826}
3827
3828static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3829 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3830{
57dc9a57
TM		 3831 struct nfs4_createdata *data;
3832 int status = -ENOMEM;
1da177e4 3833
57dc9a57
TM		 3834 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3835 if (data == NULL)
3836 goto out;
3837
1775fd3e 3838 data->arg.label = label;
57dc9a57
TM		 3839 status = nfs4_do_create(dir, dentry, data);
3840
3841 nfs4_free_createdata(data);
3842out:
1da177e4
LT		 3843 return status;
3844}
3845
3846static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3847 struct iattr *sattr)
3848{
3849 struct nfs4_exception exception = { };
aa9c2669 3850 struct nfs4_label l, *label = NULL;
1da177e4 3851 int err;
a8a5da99 3852
aa9c2669
DQ		 3853 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3854
a8a5da99 3855 sattr->ia_mode &= ~current_umask();
1da177e4 3856 do {
078ea3df
TM		 3857 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3858 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3859 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3860 &exception);
3861 } while (exception.retry);
aa9c2669
DQ		 3862 nfs4_label_release_security(label);
3863
1da177e4
LT		 3864 return err;
3865}
3866
3867static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3868 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3869{
3870 struct inode *dir = dentry->d_inode;
3871 struct nfs4_readdir_arg args = {
3872 .fh = NFS_FH(dir),
56e4ebf8 3873 .pages = pages,
1da177e4
LT		 3874 .pgbase = 0,
3875 .count = count,
96d25e53 3876 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3877 .plus = plus,
1da177e4
LT		 3878 };
3879 struct nfs4_readdir_res res;
3880 struct rpc_message msg = {
3881 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3882 .rpc_argp = &args,
3883 .rpc_resp = &res,
3884 .rpc_cred = cred,
3885 };
3886 int status;
3887
6de1472f
AV		 3888 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3889 dentry,
eadf4598 3890 (unsigned long long)cookie);
c3f52af3 3891 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3892 res.pgbase = args.pgbase;
7c513058 3893 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3894 if (status >= 0) {
c3f52af3 3895 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3896 status += args.pgbase;
3897 }
c4812998
TM		 3898
3899 nfs_invalidate_atime(dir);
3900
3110ff80 3901 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3902 return status;
3903}
3904
3905static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3906 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3907{
3908 struct nfs4_exception exception = { };
3909 int err;
3910 do {
c1578b76
TM		 3911 err = _nfs4_proc_readdir(dentry, cred, cookie,
3912 pages, count, plus);
3913 trace_nfs4_readdir(dentry->d_inode, err);
3914 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3915 &exception);
3916 } while (exception.retry);
3917 return err;
3918}
3919
3920static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3921 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3922{
57dc9a57
TM		 3923 struct nfs4_createdata *data;
3924 int mode = sattr->ia_mode;
3925 int status = -ENOMEM;
1da177e4 3926
57dc9a57
TM		 3927 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3928 if (data == NULL)
3929 goto out;
3930
1da177e4 3931 if (S_ISFIFO(mode))
57dc9a57 3932 data->arg.ftype = NF4FIFO;
1da177e4 3933 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3934 data->arg.ftype = NF4BLK;
3935 data->arg.u.device.specdata1 = MAJOR(rdev);
3936 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3937 }
3938 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3939 data->arg.ftype = NF4CHR;
3940 data->arg.u.device.specdata1 = MAJOR(rdev);
3941 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3942 } else if (!S_ISSOCK(mode)) {
3943 status = -EINVAL;
3944 goto out_free;
1da177e4 3945 }
1775fd3e 3946
aa9c2669 3947 data->arg.label = label;
57dc9a57 3948 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3949out_free:
57dc9a57
TM		 3950 nfs4_free_createdata(data);
3951out:
1da177e4
LT		 3952 return status;
3953}
3954
3955static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3956 struct iattr *sattr, dev_t rdev)
3957{
3958 struct nfs4_exception exception = { };
aa9c2669 3959 struct nfs4_label l, *label = NULL;
1da177e4 3960 int err;
a8a5da99 3961
aa9c2669
DQ		 3962 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3963
a8a5da99 3964 sattr->ia_mode &= ~current_umask();
1da177e4 3965 do {
078ea3df
TM		 3966 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3967 trace_nfs4_mknod(dir, &dentry->d_name, err);
3968 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3969 &exception);
3970 } while (exception.retry);
aa9c2669
DQ		 3971
3972 nfs4_label_release_security(label);
3973
1da177e4
LT		 3974 return err;
3975}
3976
3977static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3978 struct nfs_fsstat *fsstat)
3979{
3980 struct nfs4_statfs_arg args = {
3981 .fh = fhandle,
3982 .bitmask = server->attr_bitmask,
3983 };
24ad148a
BH		 3984 struct nfs4_statfs_res res = {
3985 .fsstat = fsstat,
3986 };
1da177e4
LT		 3987 struct rpc_message msg = {
3988 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3989 .rpc_argp = &args,
24ad148a 3990 .rpc_resp = &res,
1da177e4
LT		 3991 };
3992
0e574af1 3993 nfs_fattr_init(fsstat->fattr);
7c513058 3994 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3995}
3996
3997static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3998{
3999 struct nfs4_exception exception = { };
4000 int err;
4001 do {
4002 err = nfs4_handle_exception(server,
4003 _nfs4_proc_statfs(server, fhandle, fsstat),
4004 &exception);
4005 } while (exception.retry);
4006 return err;
4007}
4008
4009static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4010 struct nfs_fsinfo *fsinfo)
4011{
4012 struct nfs4_fsinfo_arg args = {
4013 .fh = fhandle,
4014 .bitmask = server->attr_bitmask,
4015 };
3dda5e43
BH		 4016 struct nfs4_fsinfo_res res = {
4017 .fsinfo = fsinfo,
4018 };
1da177e4
LT		 4019 struct rpc_message msg = {
4020 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4021 .rpc_argp = &args,
3dda5e43 4022 .rpc_resp = &res,
1da177e4
LT		 4023 };
4024
7c513058 4025 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4026}
4027
4028static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4029{
4030 struct nfs4_exception exception = { };
83ca7f5a 4031 unsigned long now = jiffies;
1da177e4
LT		 4032 int err;
4033
4034 do {
83ca7f5a 4035 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4036 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4037 if (err == 0) {
4038 struct nfs_client *clp = server->nfs_client;
4039
4040 spin_lock(&clp->cl_lock);
4041 clp->cl_lease_time = fsinfo->lease_time * HZ;
4042 clp->cl_last_renewal = now;
4043 spin_unlock(&clp->cl_lock);
4044 break;
4045 }
4046 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4047 } while (exception.retry);
4048 return err;
4049}
4050
4051static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4052{
e38eb650
BS		 4053 int error;
4054
0e574af1 4055 nfs_fattr_init(fsinfo->fattr);
e38eb650 4056 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4057 if (error == 0) {
4058 /* block layout checks this! */
4059 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4060 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4061 }
e38eb650
BS		 4062
4063 return error;
1da177e4
LT		 4064}
4065
4066static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4067 struct nfs_pathconf *pathconf)
4068{
4069 struct nfs4_pathconf_arg args = {
4070 .fh = fhandle,
4071 .bitmask = server->attr_bitmask,
4072 };
d45b2989
BH		 4073 struct nfs4_pathconf_res res = {
4074 .pathconf = pathconf,
4075 };
1da177e4
LT		 4076 struct rpc_message msg = {
4077 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4078 .rpc_argp = &args,
d45b2989 4079 .rpc_resp = &res,
1da177e4
LT		 4080 };
4081
4082 /* None of the pathconf attributes are mandatory to implement */
4083 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4084 memset(pathconf, 0, sizeof(*pathconf));
4085 return 0;
4086 }
4087
0e574af1 4088 nfs_fattr_init(pathconf->fattr);
7c513058 4089 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4090}
4091
4092static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4093 struct nfs_pathconf *pathconf)
4094{
4095 struct nfs4_exception exception = { };
4096 int err;
4097
4098 do {
4099 err = nfs4_handle_exception(server,
4100 _nfs4_proc_pathconf(server, fhandle, pathconf),
4101 &exception);
4102 } while (exception.retry);
4103 return err;
4104}
4105
5521abfd 4106int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4107 const struct nfs_open_context *ctx,
4108 const struct nfs_lock_context *l_ctx,
4109 fmode_t fmode)
4110{
4111 const struct nfs_lockowner *lockowner = NULL;
4112
4113 if (l_ctx != NULL)
4114 lockowner = &l_ctx->lockowner;
5521abfd 4115 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4116}
4117EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4118
5521abfd
TM		 4119static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4120 const struct nfs_open_context *ctx,
4121 const struct nfs_lock_context *l_ctx,
4122 fmode_t fmode)
4123{
4124 nfs4_stateid current_stateid;
4125
e1253be0
TM		 4126 /* If the current stateid represents a lost lock, then exit */
4127 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4128 return true;
5521abfd
TM		 4129 return nfs4_stateid_match(stateid, &current_stateid);
4130}
4131
4132static bool nfs4_error_stateid_expired(int err)
4133{
4134 switch (err) {
4135 case -NFS4ERR_DELEG_REVOKED:
4136 case -NFS4ERR_ADMIN_REVOKED:
4137 case -NFS4ERR_BAD_STATEID:
4138 case -NFS4ERR_STALE_STATEID:
4139 case -NFS4ERR_OLD_STATEID:
4140 case -NFS4ERR_OPENMODE:
4141 case -NFS4ERR_EXPIRED:
4142 return true;
4143 }
4144 return false;
4145}
4146
d45f60c6 4147void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4148{
d45f60c6 4149 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4150}
4151
d45f60c6 4152static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4153{
d45f60c6 4154 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4155
d45f60c6
WAA		 4156 trace_nfs4_read(hdr, task->tk_status);
4157 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4158 hdr->args.context->state,
4159 NULL) == -EAGAIN) {
d00c5d43 4160 rpc_restart_call_prepare(task);
ec06c096 4161 return -EAGAIN;
1da177e4 4162 }
8850df99 4163
d45f60c6 4164 __nfs4_read_done_cb(hdr);
1da177e4 4165 if (task->tk_status > 0)
d45f60c6 4166 renew_lease(server, hdr->timestamp);
ec06c096 4167 return 0;
1da177e4
LT		 4168}
4169
5521abfd 4170static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4171 struct nfs_pgio_args *args)
5521abfd
TM		 4172{
4173
4174 if (!nfs4_error_stateid_expired(task->tk_status) ||
4175 nfs4_stateid_is_current(&args->stateid,
4176 args->context,
4177 args->lock_context,
4178 FMODE_READ))
4179 return false;
4180 rpc_restart_call_prepare(task);
4181 return true;
4182}
4183
d45f60c6 4184static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4185{
4186
4187 dprintk("--> %s\n", __func__);
4188
d45f60c6 4189 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4190 return -EAGAIN;
d45f60c6 4191 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4192 return -EAGAIN;
d45f60c6
WAA		 4193 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4194 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4195}
4196
d45f60c6
WAA		 4197static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4198 struct rpc_message *msg)
1da177e4 4199{
d45f60c6
WAA		 4200 hdr->timestamp = jiffies;
4201 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4202 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4203 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4204}
4205
d45f60c6
WAA		 4206static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4207 struct nfs_pgio_header *hdr)
ea7c3303 4208{
d45f60c6
WAA		 4209 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4210 &hdr->args.seq_args,
4211 &hdr->res.seq_res,
9b206149 4212 task))
ef1820f9 4213 return 0;
d45f60c6
WAA		 4214 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4215 hdr->args.lock_context,
4216 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4217 return -EIO;
d45f60c6 4218 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4219 return -EIO;
4220 return 0;
1da177e4
LT		 4221}
4222
d45f60c6
WAA		 4223static int nfs4_write_done_cb(struct rpc_task *task,
4224 struct nfs_pgio_header *hdr)
1da177e4 4225{
d45f60c6 4226 struct inode *inode = hdr->inode;
8478eaa1 4227
d45f60c6
WAA		 4228 trace_nfs4_write(hdr, task->tk_status);
4229 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4230 hdr->args.context->state,
4231 NULL) == -EAGAIN) {
d00c5d43 4232 rpc_restart_call_prepare(task);
788e7a89 4233 return -EAGAIN;
1da177e4 4234 }
4f9838c7 4235 if (task->tk_status >= 0) {
d45f60c6
WAA		 4236 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4237 nfs_post_op_update_inode_force_wcc(inode, &hdr->fattr);
4f9838c7 4238 }
788e7a89 4239 return 0;
1da177e4
LT		 4240}
4241
5521abfd 4242static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4243 struct nfs_pgio_args *args)
5521abfd
TM		 4244{
4245
4246 if (!nfs4_error_stateid_expired(task->tk_status) ||
4247 nfs4_stateid_is_current(&args->stateid,
4248 args->context,
4249 args->lock_context,
4250 FMODE_WRITE))
4251 return false;
4252 rpc_restart_call_prepare(task);
4253 return true;
4254}
4255
d45f60c6 4256static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4257{
d45f60c6 4258 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4259 return -EAGAIN;
d45f60c6 4260 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4261 return -EAGAIN;
d45f60c6
WAA		 4262 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4263 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4264}
4265
5a37f851 4266static
d45f60c6 4267bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4268{
5a37f851 4269 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4270 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4271 return false;
4272 /* Otherwise, request attributes if and only if we don't hold
4273 * a delegation
4274 */
011e2a7f 4275 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4276}
a69aef14 4277
d45f60c6
WAA		 4278static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4279 struct rpc_message *msg)
1da177e4 4280{
d45f60c6 4281 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4282
d45f60c6
WAA		 4283 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4284 hdr->args.bitmask = NULL;
4285 hdr->res.fattr = NULL;
7ffd1064 4286 } else
d45f60c6 4287 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4288
d45f60c6
WAA		 4289 if (!hdr->pgio_done_cb)
4290 hdr->pgio_done_cb = nfs4_write_done_cb;
4291 hdr->res.server = server;
4292 hdr->timestamp = jiffies;
1da177e4 4293
bdc7f021 4294 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4295 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4296}
4297
0b7c0153 4298static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4299{
d9afbd1b
TM		 4300 nfs4_setup_sequence(NFS_SERVER(data->inode),
4301 &data->args.seq_args,
4302 &data->res.seq_res,
4303 task);
1da177e4
LT		 4304}
4305
0b7c0153 4306static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4307{
1da177e4 4308 struct inode *inode = data->inode;
14516c3a 4309
cc668ab3 4310 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4311 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4312 NULL, NULL) == -EAGAIN) {
d00c5d43 4313 rpc_restart_call_prepare(task);
788e7a89 4314 return -EAGAIN;
1da177e4 4315 }
788e7a89 4316 return 0;
1da177e4
LT		 4317}
4318
0b7c0153 4319static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4320{
4321 if (!nfs4_sequence_done(task, &data->res.seq_res))
4322 return -EAGAIN;
0b7c0153 4323 return data->commit_done_cb(task, data);
5f452431
FI		 4324}
4325
0b7c0153 4326static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4327{
788e7a89 4328 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4329
0b7c0153
FI		 4330 if (data->commit_done_cb == NULL)
4331 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4332 data->res.server = server;
bdc7f021 4333 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4334 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4335}
4336
9bc4e3ca
CL		 4337struct nfs4_renewdata {
4338 struct nfs_client *client;
4339 unsigned long timestamp;
4340};
4341
1da177e4
LT		 4342/*
4343 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4344 * standalone procedure for queueing an asynchronous RENEW.
4345 */
9bc4e3ca 4346static void nfs4_renew_release(void *calldata)
dc96aef9 4347{
9bc4e3ca
CL		 4348 struct nfs4_renewdata *data = calldata;
4349 struct nfs_client *clp = data->client;
dc96aef9 4350
0851de06
AB		 4351 if (atomic_read(&clp->cl_count) > 1)
4352 nfs4_schedule_state_renewal(clp);
4353 nfs_put_client(clp);
9bc4e3ca 4354 kfree(data);
dc96aef9
AB		 4355}
4356
9bc4e3ca 4357static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4358{
9bc4e3ca
CL		 4359 struct nfs4_renewdata *data = calldata;
4360 struct nfs_client *clp = data->client;
4361 unsigned long timestamp = data->timestamp;
1da177e4 4362
c6d01c6f 4363 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4364 switch (task->tk_status) {
4365 case 0:
4366 break;
4367 case -NFS4ERR_LEASE_MOVED:
4368 nfs4_schedule_lease_moved_recovery(clp);
4369 break;
4370 default:
95baa25c 4371 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4372 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4373 return;
4374 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4375 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4376 return;
4377 }
4378 nfs4_schedule_path_down_recovery(clp);
1da177e4 4379 }
452e9352 4380 do_renew_lease(clp, timestamp);
1da177e4
LT		 4381}
4382
963d8fe5
TM		 4383static const struct rpc_call_ops nfs4_renew_ops = {
4384 .rpc_call_done = nfs4_renew_done,
dc96aef9 4385 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4386};
4387
2f60ea6b 4388static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4389{
4390 struct rpc_message msg = {
4391 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4392 .rpc_argp = clp,
b4454fe1 4393 .rpc_cred = cred,
1da177e4 4394 };
9bc4e3ca 4395 struct nfs4_renewdata *data;
1da177e4 4396
2f60ea6b
TM		 4397 if (renew_flags == 0)
4398 return 0;
0851de06
AB		 4399 if (!atomic_inc_not_zero(&clp->cl_count))
4400 return -EIO;
b569ad34 4401 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4402 if (data == NULL)
4403 return -ENOMEM;
4404 data->client = clp;
4405 data->timestamp = jiffies;
bc7a05ca 4406 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4407 &nfs4_renew_ops, data);
1da177e4
LT		 4408}
4409
8534d4ec 4410static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4411{
4412 struct rpc_message msg = {
4413 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4414 .rpc_argp = clp,
b4454fe1 4415 .rpc_cred = cred,
1da177e4
LT		 4416 };
4417 unsigned long now = jiffies;
4418 int status;
4419
bc7a05ca 4420 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4421 if (status < 0)
4422 return status;
452e9352 4423 do_renew_lease(clp, now);
1da177e4
LT		 4424 return 0;
4425}
4426
aa1870af
BF		 4427static inline int nfs4_server_supports_acls(struct nfs_server *server)
4428{
7dd7d959 4429 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4430}
4431
21f498c2
TM		 4432/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4433 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4434 * the stack.
4435 */
21f498c2 4436#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4437
e9e3d724
NH		 4438static int buf_to_pages_noslab(const void *buf, size_t buflen,
4439 struct page **pages, unsigned int *pgbase)
4440{
4441 struct page *newpage, **spages;
4442 int rc = 0;
4443 size_t len;
4444 spages = pages;
4445
4446 do {
21f498c2 4447 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4448 newpage = alloc_page(GFP_KERNEL);
4449
4450 if (newpage == NULL)
4451 goto unwind;
4452 memcpy(page_address(newpage), buf, len);
4453 buf += len;
4454 buflen -= len;
4455 *pages++ = newpage;
4456 rc++;
4457 } while (buflen != 0);
4458
4459 return rc;
4460
4461unwind:
4462 for(; rc > 0; rc--)
4463 __free_page(spages[rc-1]);
4464 return -ENOMEM;
4465}
4466
e50a1c2e
BF		 4467struct nfs4_cached_acl {
4468 int cached;
4469 size_t len;
3e9d4154 4470 char data[0];
e50a1c2e
BF		 4471};
4472
4473static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4474{
4475 struct nfs_inode *nfsi = NFS_I(inode);
4476
4477 spin_lock(&inode->i_lock);
4478 kfree(nfsi->nfs4_acl);
4479 nfsi->nfs4_acl = acl;
4480 spin_unlock(&inode->i_lock);
4481}
4482
4483static void nfs4_zap_acl_attr(struct inode *inode)
4484{
4485 nfs4_set_cached_acl(inode, NULL);
4486}
4487
4488static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4489{
4490 struct nfs_inode *nfsi = NFS_I(inode);
4491 struct nfs4_cached_acl *acl;
4492 int ret = -ENOENT;
4493
4494 spin_lock(&inode->i_lock);
4495 acl = nfsi->nfs4_acl;
4496 if (acl == NULL)
4497 goto out;
4498 if (buf == NULL) /* user is just asking for length */
4499 goto out_len;
4500 if (acl->cached == 0)
4501 goto out;
4502 ret = -ERANGE; /* see getxattr(2) man page */
4503 if (acl->len > buflen)
4504 goto out;
4505 memcpy(buf, acl->data, acl->len);
4506out_len:
4507 ret = acl->len;
4508out:
4509 spin_unlock(&inode->i_lock);
4510 return ret;
4511}
4512
5794d21e 4513static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4514{
4515 struct nfs4_cached_acl *acl;
b291f1b1 4516 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4517
1f1ea6c2 4518 if (buflen <= PAGE_SIZE) {
b291f1b1 4519 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4520 if (acl == NULL)
4521 goto out;
4522 acl->cached = 1;
5794d21e 4523 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4524 } else {
4525 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4526 if (acl == NULL)
4527 goto out;
4528 acl->cached = 0;
4529 }
4530 acl->len = acl_len;
4531out:
4532 nfs4_set_cached_acl(inode, acl);
4533}
4534
bf118a34
AA		 4535/*
4536 * The getxattr API returns the required buffer length when called with a
4537 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4538 * the required buf. On a NULL buf, we send a page of data to the server
4539 * guessing that the ACL request can be serviced by a page. If so, we cache
4540 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4541 * the cache. If not so, we throw away the page, and cache the required
4542 * length. The next getxattr call will then produce another round trip to
4543 * the server, this time with the input buf of the required size.
4544 */
16b4289c 4545static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4546{
bf118a34 4547 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4548 struct nfs_getaclargs args = {
4549 .fh = NFS_FH(inode),
4550 .acl_pages = pages,
4551 .acl_len = buflen,
4552 };
663c79b3
BH		 4553 struct nfs_getaclres res = {
4554 .acl_len = buflen,
4555 };
aa1870af
BF		 4556 struct rpc_message msg = {
4557 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4558 .rpc_argp = &args,
663c79b3 4559 .rpc_resp = &res,
aa1870af 4560 };
21f498c2
TM		 4561 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4562 int ret = -ENOMEM, i;
aa1870af 4563
bf118a34
AA		 4564 /* As long as we're doing a round trip to the server anyway,
4565 * let's be prepared for a page of acl data. */
4566 if (npages == 0)
4567 npages = 1;
21f498c2
TM		 4568 if (npages > ARRAY_SIZE(pages))
4569 return -ERANGE;
5a006899 4570
bf118a34
AA		 4571 for (i = 0; i < npages; i++) {
4572 pages[i] = alloc_page(GFP_KERNEL);
4573 if (!pages[i])
4574 goto out_free;
e50a1c2e 4575 }
5a006899
SP		 4576
4577 /* for decoding across pages */
4578 res.acl_scratch = alloc_page(GFP_KERNEL);
4579 if (!res.acl_scratch)
4580 goto out_free;
4581
bf118a34
AA		 4582 args.acl_len = npages * PAGE_SIZE;
4583 args.acl_pgbase = 0;
5a006899 4584
de040bec 4585 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4586 __func__, buf, buflen, npages, args.acl_len);
4587 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4588 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4589 if (ret)
4590 goto out_free;
bf118a34 4591
1f1ea6c2
TM		 4592 /* Handle the case where the passed-in buffer is too short */
4593 if (res.acl_flags & NFS4_ACL_TRUNC) {
4594 /* Did the user only issue a request for the acl length? */
4595 if (buf == NULL)
4596 goto out_ok;
e50a1c2e 4597 ret = -ERANGE;
1f1ea6c2 4598 goto out_free;
e50a1c2e 4599 }
1f1ea6c2 4600 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4601 if (buf) {
4602 if (res.acl_len > buflen) {
4603 ret = -ERANGE;
4604 goto out_free;
4605 }
1f1ea6c2 4606 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4607 }
1f1ea6c2
TM		 4608out_ok:
4609 ret = res.acl_len;
e50a1c2e 4610out_free:
bf118a34
AA		 4611 for (i = 0; i < npages; i++)
4612 if (pages[i])
4613 __free_page(pages[i]);
331818f1
TM		 4614 if (res.acl_scratch)
4615 __free_page(res.acl_scratch);
aa1870af
BF		 4616 return ret;
4617}
4618
16b4289c
TM		 4619static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4620{
4621 struct nfs4_exception exception = { };
4622 ssize_t ret;
4623 do {
4624 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4625 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4626 if (ret >= 0)
4627 break;
4628 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4629 } while (exception.retry);
4630 return ret;
4631}
4632
e50a1c2e
BF		 4633static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4634{
4635 struct nfs_server *server = NFS_SERVER(inode);
4636 int ret;
4637
4638 if (!nfs4_server_supports_acls(server))
4639 return -EOPNOTSUPP;
4640 ret = nfs_revalidate_inode(server, inode);
4641 if (ret < 0)
4642 return ret;
08a22b39
AK		 4643 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4644 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4645 ret = nfs4_read_cached_acl(inode, buf, buflen);
4646 if (ret != -ENOENT)
bf118a34
AA		 4647 /* -ENOENT is returned if there is no ACL or if there is an ACL
4648 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4649 return ret;
4650 return nfs4_get_acl_uncached(inode, buf, buflen);
4651}
4652
16b4289c 4653static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4654{
4655 struct nfs_server *server = NFS_SERVER(inode);
4656 struct page *pages[NFS4ACL_MAXPAGES];
4657 struct nfs_setaclargs arg = {
4658 .fh = NFS_FH(inode),
4659 .acl_pages = pages,
4660 .acl_len = buflen,
4661 };
73c403a9 4662 struct nfs_setaclres res;
4b580ee3
BF		 4663 struct rpc_message msg = {
4664 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4665 .rpc_argp = &arg,
73c403a9 4666 .rpc_resp = &res,
4b580ee3 4667 };
21f498c2 4668 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4669 int ret, i;
4b580ee3
BF		 4670
4671 if (!nfs4_server_supports_acls(server))
4672 return -EOPNOTSUPP;
21f498c2
TM		 4673 if (npages > ARRAY_SIZE(pages))
4674 return -ERANGE;
e9e3d724
NH		 4675 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4676 if (i < 0)
4677 return i;
57ec14c5 4678 nfs4_inode_return_delegation(inode);
7c513058 4679 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4680
4681 /*
4682 * Free each page after tx, so the only ref left is
4683 * held by the network stack
4684 */
4685 for (; i > 0; i--)
4686 put_page(pages[i-1]);
4687
08a22b39
AK		 4688 /*
4689 * Acl update can result in inode attribute update.
4690 * so mark the attribute cache invalid.
4691 */
4692 spin_lock(&inode->i_lock);
4693 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4694 spin_unlock(&inode->i_lock);
f41f7418
TM		 4695 nfs_access_zap_cache(inode);
4696 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4697 return ret;
4698}
4699
16b4289c
TM		 4700static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4701{
4702 struct nfs4_exception exception = { };
4703 int err;
4704 do {
c1578b76
TM		 4705 err = __nfs4_proc_set_acl(inode, buf, buflen);
4706 trace_nfs4_set_acl(inode, err);
4707 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4708 &exception);
4709 } while (exception.retry);
4710 return err;
4711}
4712
aa9c2669
DQ		 4713#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4714static int _nfs4_get_security_label(struct inode *inode, void *buf,
4715 size_t buflen)
4716{
4717 struct nfs_server *server = NFS_SERVER(inode);
4718 struct nfs_fattr fattr;
4719 struct nfs4_label label = {0, 0, buflen, buf};
4720
4721 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4722 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4723 .fh = NFS_FH(inode),
4724 .bitmask = bitmask,
4725 };
4726 struct nfs4_getattr_res res = {
4727 .fattr = &fattr,
4728 .label = &label,
4729 .server = server,
4730 };
4731 struct rpc_message msg = {
4732 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4733 .rpc_argp = &arg,
aa9c2669
DQ		 4734 .rpc_resp = &res,
4735 };
4736 int ret;
4737
4738 nfs_fattr_init(&fattr);
4739
fcb63a9b 4740 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4741 if (ret)
4742 return ret;
4743 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4744 return -ENOENT;
4745 if (buflen < label.len)
4746 return -ERANGE;
4747 return 0;
4748}
4749
4750static int nfs4_get_security_label(struct inode *inode, void *buf,
4751 size_t buflen)
4752{
4753 struct nfs4_exception exception = { };
4754 int err;
4755
4756 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4757 return -EOPNOTSUPP;
4758
4759 do {
c1578b76
TM		 4760 err = _nfs4_get_security_label(inode, buf, buflen);
4761 trace_nfs4_get_security_label(inode, err);
4762 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4763 &exception);
4764 } while (exception.retry);
4765 return err;
4766}
4767
4768static int _nfs4_do_set_security_label(struct inode *inode,
4769 struct nfs4_label *ilabel,
4770 struct nfs_fattr *fattr,
4771 struct nfs4_label *olabel)
4772{
4773
4774 struct iattr sattr = {0};
4775 struct nfs_server *server = NFS_SERVER(inode);
4776 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4777 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4778 .fh = NFS_FH(inode),
4779 .iap = &sattr,
4780 .server = server,
4781 .bitmask = bitmask,
4782 .label = ilabel,
4783 };
4784 struct nfs_setattrres res = {
4785 .fattr = fattr,
4786 .label = olabel,
4787 .server = server,
4788 };
4789 struct rpc_message msg = {
4790 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4791 .rpc_argp = &arg,
aa9c2669
DQ		 4792 .rpc_resp = &res,
4793 };
4794 int status;
4795
12207f69 4796 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4797
12207f69 4798 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4799 if (status)
4800 dprintk("%s failed: %d\n", __func__, status);
4801
4802 return status;
4803}
4804
4805static int nfs4_do_set_security_label(struct inode *inode,
4806 struct nfs4_label *ilabel,
4807 struct nfs_fattr *fattr,
4808 struct nfs4_label *olabel)
4809{
4810 struct nfs4_exception exception = { };
4811 int err;
4812
4813 do {
c1578b76
TM		 4814 err = _nfs4_do_set_security_label(inode, ilabel,
4815 fattr, olabel);
4816 trace_nfs4_set_security_label(inode, err);
4817 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4818 &exception);
4819 } while (exception.retry);
4820 return err;
4821}
4822
4823static int
4824nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4825{
4826 struct nfs4_label ilabel, *olabel = NULL;
4827 struct nfs_fattr fattr;
4828 struct rpc_cred *cred;
4829 struct inode *inode = dentry->d_inode;
4830 int status;
4831
4832 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4833 return -EOPNOTSUPP;
4834
4835 nfs_fattr_init(&fattr);
4836
4837 ilabel.pi = 0;
4838 ilabel.lfs = 0;
4839 ilabel.label = (char *)buf;
4840 ilabel.len = buflen;
4841
4842 cred = rpc_lookup_cred();
4843 if (IS_ERR(cred))
4844 return PTR_ERR(cred);
4845
4846 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4847 if (IS_ERR(olabel)) {
4848 status = -PTR_ERR(olabel);
4849 goto out;
4850 }
4851
4852 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4853 if (status == 0)
4854 nfs_setsecurity(inode, &fattr, olabel);
4855
4856 nfs4_label_free(olabel);
4857out:
4858 put_rpccred(cred);
4859 return status;
4860}
4861#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4862
4863
1da177e4 4864static int
8478eaa1
N		 4865nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4866 struct nfs4_state *state, long *timeout)
1da177e4 4867{
aa5190d0
TM		 4868 struct nfs_client *clp = server->nfs_client;
4869
4870 if (task->tk_status >= 0)
1da177e4
LT		 4871 return 0;
4872 switch(task->tk_status) {
a1d0b5ee 4873 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4874 case -NFS4ERR_ADMIN_REVOKED:
4875 case -NFS4ERR_BAD_STATEID:
4876 case -NFS4ERR_OPENMODE:
4877 if (state == NULL)
4878 break;
5d422301 4879 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4880 goto recovery_failed;
0400a6b0 4881 goto wait_on_recovery;
0ced63d1 4882 case -NFS4ERR_EXPIRED:
5d422301
TM		 4883 if (state != NULL) {
4884 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4885 goto recovery_failed;
5d422301 4886 }
1da177e4 4887 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4888 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4889 nfs4_schedule_lease_recovery(clp);
4890 goto wait_on_recovery;
519ae255
CL		 4891 case -NFS4ERR_MOVED:
4892 if (nfs4_schedule_migration_recovery(server) < 0)
4893 goto recovery_failed;
4894 goto wait_on_recovery;
8ef2f8d4
CL		 4895 case -NFS4ERR_LEASE_MOVED:
4896 nfs4_schedule_lease_moved_recovery(clp);
4897 goto wait_on_recovery;
4745e315
AA		 4898#if defined(CONFIG_NFS_V4_1)
4899 case -NFS4ERR_BADSESSION:
4900 case -NFS4ERR_BADSLOT:
4901 case -NFS4ERR_BAD_HIGH_SLOT:
4902 case -NFS4ERR_DEADSESSION:
4903 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4904 case -NFS4ERR_SEQ_FALSE_RETRY:
4905 case -NFS4ERR_SEQ_MISORDERED:
4906 dprintk("%s ERROR %d, Reset session\n", __func__,
4907 task->tk_status);
9f594791 4908 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4909 goto wait_on_recovery;
4745e315 4910#endif /* CONFIG_NFS_V4_1 */
1da177e4 4911 case -NFS4ERR_DELAY:
aa5190d0 4912 nfs_inc_server_stats(server, NFSIOS_DELAY);
8478eaa1
N		 4913 rpc_delay(task, nfs4_update_delay(timeout));
4914 goto restart_call;
006ea73e 4915 case -NFS4ERR_GRACE:
1da177e4 4916 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4917 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4918 case -NFS4ERR_OLD_STATEID:
f1478c13 4919 goto restart_call;
1da177e4
LT		 4920 }
4921 task->tk_status = nfs4_map_errors(task->tk_status);
4922 return 0;
9f51a78e 4923recovery_failed:
5d422301
TM		 4924 task->tk_status = -EIO;
4925 return 0;
0400a6b0 4926wait_on_recovery:
a2c0b9e2 4927 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4928 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4929 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4930 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4931 goto recovery_failed;
f1478c13 4932restart_call:
a2c0b9e2
TM		 4933 task->tk_status = 0;
4934 return -EAGAIN;
1da177e4
LT		 4935}
4936
f092075d
CL		 4937static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4938 nfs4_verifier *bootverf)
cd93710e
CL		 4939{
4940 __be32 verf[2];
4941
2c820d9a
CL		 4942 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4943 /* An impossible timestamp guarantees this value
4944 * will never match a generated boot time. */
4945 verf[0] = 0;
17f26b12 4946 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4947 } else {
f092075d 4948 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4949 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4950 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4951 }
cd93710e
CL		 4952 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4953}
4954
e984a55a 4955static unsigned int
ceb3a16c 4956nfs4_init_nonuniform_client_string(struct nfs_client *clp,
e984a55a
CL		 4957 char *buf, size_t len)
4958{
4959 unsigned int result;
4960
ceb3a16c
TM		 4961 if (clp->cl_owner_id != NULL)
4962 return strlcpy(buf, clp->cl_owner_id, len);
4963
e984a55a
CL		 4964 rcu_read_lock();
4965 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4966 clp->cl_ipaddr,
4967 rpc_peeraddr2str(clp->cl_rpcclient,
4968 RPC_DISPLAY_ADDR),
4969 rpc_peeraddr2str(clp->cl_rpcclient,
4970 RPC_DISPLAY_PROTO));
4971 rcu_read_unlock();
ceb3a16c 4972 clp->cl_owner_id = kstrdup(buf, GFP_KERNEL);
e984a55a
CL		 4973 return result;
4974}
4975
4976static unsigned int
ceb3a16c 4977nfs4_init_uniform_client_string(struct nfs_client *clp,
e984a55a
CL		 4978 char *buf, size_t len)
4979{
55b59293 4980 const char *nodename = clp->cl_rpcclient->cl_nodename;
ceb3a16c
TM		 4981 unsigned int result;
4982
4983 if (clp->cl_owner_id != NULL)
4984 return strlcpy(buf, clp->cl_owner_id, len);
6f2ea7f2
CL		 4985
4986 if (nfs4_client_id_uniquifier[0] != '\0')
ceb3a16c 4987 result = scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
55b59293
TM		 4988 clp->rpc_ops->version,
4989 clp->cl_minorversion,
4990 nfs4_client_id_uniquifier,
4991 nodename);
ceb3a16c
TM		 4992 else
4993 result = scnprintf(buf, len, "Linux NFSv%u.%u %s",
e984a55a 4994 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4995 nodename);
ceb3a16c
TM		 4996 clp->cl_owner_id = kstrdup(buf, GFP_KERNEL);
4997 return result;
e984a55a
CL		 4998}
4999
706cb8db
CL		 5000/*
5001 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5002 * services. Advertise one based on the address family of the
5003 * clientaddr.
5004 */
5005static unsigned int
5006nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5007{
5008 if (strchr(clp->cl_ipaddr, ':') != NULL)
5009 return scnprintf(buf, len, "tcp6");
5010 else
5011 return scnprintf(buf, len, "tcp");
5012}
5013
f11b2a1c
JL		 5014static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5015{
5016 struct nfs4_setclientid *sc = calldata;
5017
5018 if (task->tk_status == 0)
5019 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5020}
5021
5022static const struct rpc_call_ops nfs4_setclientid_ops = {
5023 .rpc_call_done = nfs4_setclientid_done,
5024};
5025
6bbb4ae8
CL		 5026/**
5027 * nfs4_proc_setclientid - Negotiate client ID
5028 * @clp: state data structure
5029 * @program: RPC program for NFSv4 callback service
5030 * @port: IP port number for NFS4 callback service
5031 * @cred: RPC credential to use for this call
5032 * @res: where to place the result
5033 *
5034 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5035 */
bb8b27e5
TM		 5036int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5037 unsigned short port, struct rpc_cred *cred,
5038 struct nfs4_setclientid_res *res)
1da177e4
LT		 5039{
5040 nfs4_verifier sc_verifier;
5041 struct nfs4_setclientid setclientid = {
5042 .sc_verifier = &sc_verifier,
5043 .sc_prog = program,
f4eecd5d 5044 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 5045 };
5046 struct rpc_message msg = {
5047 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5048 .rpc_argp = &setclientid,
bb8b27e5 5049 .rpc_resp = res,
286d7d6a 5050 .rpc_cred = cred,
1da177e4 5051 };
f11b2a1c
JL		 5052 struct rpc_task *task;
5053 struct rpc_task_setup task_setup_data = {
5054 .rpc_client = clp->cl_rpcclient,
5055 .rpc_message = &msg,
5056 .callback_ops = &nfs4_setclientid_ops,
5057 .callback_data = &setclientid,
5058 .flags = RPC_TASK_TIMEOUT,
5059 };
6bbb4ae8 5060 int status;
1da177e4 5061
de734831 5062 /* nfs_client_id4 */
f092075d 5063 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 5064 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5065 setclientid.sc_name_len =
5066 nfs4_init_uniform_client_string(clp,
5067 setclientid.sc_name,
5068 sizeof(setclientid.sc_name));
5069 else
5070 setclientid.sc_name_len =
5071 nfs4_init_nonuniform_client_string(clp,
5072 setclientid.sc_name,
5073 sizeof(setclientid.sc_name));
de734831 5074 /* cb_client4 */
706cb8db
CL		 5075 setclientid.sc_netid_len =
5076 nfs4_init_callback_netid(clp,
5077 setclientid.sc_netid,
5078 sizeof(setclientid.sc_netid));
de734831 5079 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5080 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5081 clp->cl_ipaddr, port >> 8, port & 255);
5082
6bbb4ae8
CL		 5083 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
5084 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5085 setclientid.sc_name_len, setclientid.sc_name);
f11b2a1c
JL		 5086 task = rpc_run_task(&task_setup_data);
5087 if (IS_ERR(task)) {
5088 status = PTR_ERR(task);
5089 goto out;
5090 }
5091 status = task->tk_status;
5092 if (setclientid.sc_cred) {
5093 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5094 put_rpccred(setclientid.sc_cred);
5095 }
5096 rpc_put_task(task);
5097out:
c6d01c6f 5098 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5099 dprintk("NFS reply setclientid: %d\n", status);
5100 return status;
1da177e4
LT		 5101}
5102
6bbb4ae8
CL		 5103/**
5104 * nfs4_proc_setclientid_confirm - Confirm client ID
5105 * @clp: state data structure
5106 * @res: result of a previous SETCLIENTID
5107 * @cred: RPC credential to use for this call
5108 *
5109 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5110 */
fd954ae1 5111int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5112 struct nfs4_setclientid_res *arg,
5113 struct rpc_cred *cred)
1da177e4 5114{
1da177e4
LT		 5115 struct rpc_message msg = {
5116 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5117 .rpc_argp = arg,
286d7d6a 5118 .rpc_cred = cred,
1da177e4 5119 };
1da177e4
LT		 5120 int status;
5121
6bbb4ae8
CL		 5122 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5123 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5124 clp->cl_clientid);
1bd714f2 5125 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5126 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5127 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5128 return status;
5129}
5130
fe650407
TM		 5131struct nfs4_delegreturndata {
5132 struct nfs4_delegreturnargs args;
fa178f29 5133 struct nfs4_delegreturnres res;
fe650407
TM		 5134 struct nfs_fh fh;
5135 nfs4_stateid stateid;
26e976a8 5136 unsigned long timestamp;
fa178f29 5137 struct nfs_fattr fattr;
fe650407 5138 int rpc_status;
039b756a
PT		 5139 struct inode *inode;
5140 bool roc;
5141 u32 roc_barrier;
fe650407
TM		 5142};
5143
fe650407
TM		 5144static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5145{
5146 struct nfs4_delegreturndata *data = calldata;
938e1010 5147
14516c3a
TM		 5148 if (!nfs4_sequence_done(task, &data->res.seq_res))
5149 return;
938e1010 5150
ca8acf8d 5151 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5152 switch (task->tk_status) {
79708861 5153 case 0:
fa178f29 5154 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5155 case -NFS4ERR_ADMIN_REVOKED:
5156 case -NFS4ERR_DELEG_REVOKED:
5157 case -NFS4ERR_BAD_STATEID:
5158 case -NFS4ERR_OLD_STATEID:
5159 case -NFS4ERR_STALE_STATEID:
5160 case -NFS4ERR_EXPIRED:
5161 task->tk_status = 0;
039b756a
PT		 5162 if (data->roc)
5163 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5164 break;
79708861 5165 default:
8478eaa1
N		 5166 if (nfs4_async_handle_error(task, data->res.server,
5167 NULL, NULL) == -EAGAIN) {
d00c5d43 5168 rpc_restart_call_prepare(task);
79708861
RL		 5169 return;
5170 }
5171 }
5172 data->rpc_status = task->tk_status;
fe650407
TM		 5173}
5174
5175static void nfs4_delegreturn_release(void *calldata)
5176{
039b756a 5177 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5178 struct inode *inode = data->inode;
039b756a 5179
ea7c38fe
TM		 5180 if (inode) {
5181 if (data->roc)
5182 pnfs_roc_release(inode);
5183 nfs_iput_and_deactive(inode);
5184 }
fe650407
TM		 5185 kfree(calldata);
5186}
5187
938e1010
AA		 5188static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5189{
5190 struct nfs4_delegreturndata *d_data;
5191
5192 d_data = (struct nfs4_delegreturndata *)data;
5193
039b756a
PT		 5194 if (d_data->roc &&
5195 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5196 return;
5197
d9afbd1b
TM		 5198 nfs4_setup_sequence(d_data->res.server,
5199 &d_data->args.seq_args,
5200 &d_data->res.seq_res,
5201 task);
938e1010 5202}
938e1010 5203
c8d149f3 5204static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5205 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5206 .rpc_call_done = nfs4_delegreturn_done,
5207 .rpc_release = nfs4_delegreturn_release,
5208};
5209
e6f81075 5210static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5211{
5212 struct nfs4_delegreturndata *data;
fa178f29 5213 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5214 struct rpc_task *task;
5138fde0
TM		 5215 struct rpc_message msg = {
5216 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5217 .rpc_cred = cred,
5218 };
c970aa85
TM		 5219 struct rpc_task_setup task_setup_data = {
5220 .rpc_client = server->client,
5138fde0 5221 .rpc_message = &msg,
c970aa85
TM		 5222 .callback_ops = &nfs4_delegreturn_ops,
5223 .flags = RPC_TASK_ASYNC,
5224 };
e6f81075 5225 int status = 0;
fe650407 5226
8535b2be 5227 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5228 if (data == NULL)
5229 return -ENOMEM;
a9c92d6b 5230 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5231 data->args.fhandle = &data->fh;
5232 data->args.stateid = &data->stateid;
9e907fec 5233 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5234 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5235 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5236 data->res.fattr = &data->fattr;
5237 data->res.server = server;
5138fde0 5238 nfs_fattr_init(data->res.fattr);
26e976a8 5239 data->timestamp = jiffies;
fe650407 5240 data->rpc_status = 0;
ea7c38fe
TM		 5241 data->inode = nfs_igrab_and_active(inode);
5242 if (data->inode)
5243 data->roc = nfs4_roc(inode);
fe650407 5244
c970aa85 5245 task_setup_data.callback_data = data;
1174dd1f
TM		 5246 msg.rpc_argp = &data->args;
5247 msg.rpc_resp = &data->res;
c970aa85 5248 task = rpc_run_task(&task_setup_data);
7a1218a2 5249 if (IS_ERR(task))
fe650407 5250 return PTR_ERR(task);
e6f81075
TM		 5251 if (!issync)
5252 goto out;
fe650407 5253 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5254 if (status != 0)
5255 goto out;
5256 status = data->rpc_status;
e144cbcc
TM		 5257 if (status == 0)
5258 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5259 else
5260 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5261out:
e6b3c4db 5262 rpc_put_task(task);
fe650407 5263 return status;
1da177e4
LT		 5264}
5265
e6f81075 5266int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5267{
5268 struct nfs_server *server = NFS_SERVER(inode);
5269 struct nfs4_exception exception = { };
5270 int err;
5271 do {
e6f81075 5272 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5273 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5274 switch (err) {
5275 case -NFS4ERR_STALE_STATEID:
5276 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5277 case 0:
5278 return 0;
5279 }
5280 err = nfs4_handle_exception(server, err, &exception);
5281 } while (exception.retry);
5282 return err;
5283}
5284
5285#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5286#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5287
5288/*
5289 * sleep, with exponential backoff, and retry the LOCK operation.
5290 */
5291static unsigned long
5292nfs4_set_lock_task_retry(unsigned long timeout)
5293{
416ad3c9 5294 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5295 timeout <<= 1;
5296 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5297 return NFS4_LOCK_MAXTIMEOUT;
5298 return timeout;
5299}
5300
1da177e4
LT		 5301static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5302{
5303 struct inode *inode = state->inode;
5304 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5305 struct nfs_client *clp = server->nfs_client;
911d1aaf 5306 struct nfs_lockt_args arg = {
1da177e4 5307 .fh = NFS_FH(inode),
911d1aaf 5308 .fl = request,
1da177e4 5309 };
911d1aaf
TM		 5310 struct nfs_lockt_res res = {
5311 .denied = request,
1da177e4
LT		 5312 };
5313 struct rpc_message msg = {
5314 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5315 .rpc_argp = &arg,
5316 .rpc_resp = &res,
5317 .rpc_cred = state->owner->so_cred,
5318 };
1da177e4
LT		 5319 struct nfs4_lock_state *lsp;
5320 int status;
5321
911d1aaf 5322 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5323 status = nfs4_set_lock_state(state, request);
5324 if (status != 0)
5325 goto out;
5326 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5327 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5328 arg.lock_owner.s_dev = server->s_dev;
7c513058 5329 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5330 switch (status) {
5331 case 0:
5332 request->fl_type = F_UNLCK;
5333 break;
5334 case -NFS4ERR_DENIED:
5335 status = 0;
1da177e4 5336 }
70cc6487 5337 request->fl_ops->fl_release_private(request);
a6f951dd 5338 request->fl_ops = NULL;
8d0a8a9d 5339out:
1da177e4
LT		 5340 return status;
5341}
5342
5343static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5344{
5345 struct nfs4_exception exception = { };
5346 int err;
5347
5348 do {
d1b748a5
TM		 5349 err = _nfs4_proc_getlk(state, cmd, request);
5350 trace_nfs4_get_lock(request, state, cmd, err);
5351 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5352 &exception);
5353 } while (exception.retry);
5354 return err;
5355}
5356
5357static int do_vfs_lock(struct file *file, struct file_lock *fl)
5358{
5359 int res = 0;
5360 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5361 case FL_POSIX:
5362 res = posix_lock_file_wait(file, fl);
5363 break;
5364 case FL_FLOCK:
5365 res = flock_lock_file_wait(file, fl);
5366 break;
5367 default:
5368 BUG();
5369 }
1da177e4
LT		 5370 return res;
5371}
5372
faf5f49c 5373struct nfs4_unlockdata {
911d1aaf
TM		 5374 struct nfs_locku_args arg;
5375 struct nfs_locku_res res;
faf5f49c
TM		 5376 struct nfs4_lock_state *lsp;
5377 struct nfs_open_context *ctx;
911d1aaf
TM		 5378 struct file_lock fl;
5379 const struct nfs_server *server;
26e976a8 5380 unsigned long timestamp;
faf5f49c
TM		 5381};
5382
911d1aaf
TM		 5383static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5384 struct nfs_open_context *ctx,
5385 struct nfs4_lock_state *lsp,
5386 struct nfs_seqid *seqid)
5387{
5388 struct nfs4_unlockdata *p;
5389 struct inode *inode = lsp->ls_state->inode;
5390
8535b2be 5391 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5392 if (p == NULL)
5393 return NULL;
5394 p->arg.fh = NFS_FH(inode);
5395 p->arg.fl = &p->fl;
5396 p->arg.seqid = seqid;
c1d51931 5397 p->res.seqid = seqid;
911d1aaf
TM		 5398 p->lsp = lsp;
5399 atomic_inc(&lsp->ls_count);
5400 /* Ensure we don't close file until we're done freeing locks! */
5401 p->ctx = get_nfs_open_context(ctx);
5402 memcpy(&p->fl, fl, sizeof(p->fl));
5403 p->server = NFS_SERVER(inode);
5404 return p;
5405}
5406
06f814a3 5407static void nfs4_locku_release_calldata(void *data)
faf5f49c 5408{
963d8fe5 5409 struct nfs4_unlockdata *calldata = data;
911d1aaf 5410 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5411 nfs4_put_lock_state(calldata->lsp);
5412 put_nfs_open_context(calldata->ctx);
5413 kfree(calldata);
faf5f49c
TM		 5414}
5415
963d8fe5 5416static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5417{
963d8fe5 5418 struct nfs4_unlockdata *calldata = data;
faf5f49c 5419
14516c3a
TM		 5420 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5421 return;
faf5f49c
TM		 5422 switch (task->tk_status) {
5423 case 0:
26e976a8 5424 renew_lease(calldata->server, calldata->timestamp);
c69899a1
TM		 5425 do_vfs_lock(calldata->fl.fl_file, &calldata->fl);
5426 if (nfs4_update_lock_stateid(calldata->lsp,
5427 &calldata->res.stateid))
5428 break;
9e33bed5
TM		 5429 case -NFS4ERR_BAD_STATEID:
5430 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5431 case -NFS4ERR_STALE_STATEID:
5432 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5433 if (!nfs4_stateid_match(&calldata->arg.stateid,
5434 &calldata->lsp->ls_stateid))
5435 rpc_restart_call_prepare(task);
faf5f49c
TM		 5436 break;
5437 default:
8478eaa1
N		 5438 if (nfs4_async_handle_error(task, calldata->server,
5439 NULL, NULL) == -EAGAIN)
d00c5d43 5440 rpc_restart_call_prepare(task);
faf5f49c 5441 }
2b1bc308 5442 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5443}
5444
4ce70ada 5445static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5446{
4ce70ada 5447 struct nfs4_unlockdata *calldata = data;
faf5f49c 5448
911d1aaf 5449 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5450 goto out_wait;
425c1d4e 5451 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5452 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5453 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5454 goto out_no_action;
faf5f49c 5455 }
26e976a8 5456 calldata->timestamp = jiffies;
035168ab 5457 if (nfs4_setup_sequence(calldata->server,
a893693c 5458 &calldata->arg.seq_args,
2240a9e2
TM		 5459 &calldata->res.seq_res,
5460 task) != 0)
5461 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5462 return;
5463out_no_action:
5464 task->tk_action = NULL;
5465out_wait:
5466 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5467}
5468
963d8fe5 5469static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5470 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5471 .rpc_call_done = nfs4_locku_done,
06f814a3 5472 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5473};
5474
a5d16a4d
TM		 5475static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5476 struct nfs_open_context *ctx,
5477 struct nfs4_lock_state *lsp,
5478 struct nfs_seqid *seqid)
5479{
5480 struct nfs4_unlockdata *data;
5138fde0
TM		 5481 struct rpc_message msg = {
5482 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5483 .rpc_cred = ctx->cred,
5484 };
c970aa85
TM		 5485 struct rpc_task_setup task_setup_data = {
5486 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5487 .rpc_message = &msg,
c970aa85 5488 .callback_ops = &nfs4_locku_ops,
101070ca 5489 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5490 .flags = RPC_TASK_ASYNC,
5491 };
a5d16a4d 5492
fa940720
WAA		 5493 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5494 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5495
137d6aca
FF		 5496 /* Ensure this is an unlock - when canceling a lock, the
5497 * canceled lock is passed in, and it won't be an unlock.
5498 */
5499 fl->fl_type = F_UNLCK;
5500
a5d16a4d
TM		 5501 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5502 if (data == NULL) {
5503 nfs_free_seqid(seqid);
5504 return ERR_PTR(-ENOMEM);
5505 }
5506
a9c92d6b 5507 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5508 msg.rpc_argp = &data->arg;
5509 msg.rpc_resp = &data->res;
c970aa85
TM		 5510 task_setup_data.callback_data = data;
5511 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5512}
5513
faf5f49c
TM		 5514static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5515{
65b62a29
TM		 5516 struct inode *inode = state->inode;
5517 struct nfs4_state_owner *sp = state->owner;
5518 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5519 struct nfs_seqid *seqid;
1da177e4 5520 struct nfs4_lock_state *lsp;
06f814a3 5521 struct rpc_task *task;
b4019c0e 5522 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5523 int status = 0;
536ff0f8 5524 unsigned char fl_flags = request->fl_flags;
faf5f49c 5525
8d0a8a9d 5526 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5527 /* Unlock _before_ we do the RPC call */
5528 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5529 /* Exclude nfs_delegation_claim_locks() */
5530 mutex_lock(&sp->so_delegreturn_mutex);
5531 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5532 down_read(&nfsi->rwsem);
5533 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5534 up_read(&nfsi->rwsem);
65b62a29 5535 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5536 goto out;
19e03c57
TM		 5537 }
5538 up_read(&nfsi->rwsem);
65b62a29 5539 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5540 if (status != 0)
9b073574
TM		 5541 goto out;
5542 /* Is this a delegated lock? */
8d0a8a9d 5543 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5544 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5545 goto out;
b4019c0e
TM		 5546 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5547 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5548 status = -ENOMEM;
badc76dd 5549 if (IS_ERR(seqid))
9b073574 5550 goto out;
cd3758e3 5551 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5552 status = PTR_ERR(task);
5553 if (IS_ERR(task))
9b073574 5554 goto out;
a5d16a4d 5555 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5556 rpc_put_task(task);
9b073574 5557out:
536ff0f8 5558 request->fl_flags = fl_flags;
d1b748a5 5559 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5560 return status;
5561}
5562
a5d16a4d
TM		 5563struct nfs4_lockdata {
5564 struct nfs_lock_args arg;
5565 struct nfs_lock_res res;
5566 struct nfs4_lock_state *lsp;
5567 struct nfs_open_context *ctx;
5568 struct file_lock fl;
26e976a8 5569 unsigned long timestamp;
a5d16a4d
TM		 5570 int rpc_status;
5571 int cancelled;
66179efe 5572 struct nfs_server *server;
a5d16a4d
TM		 5573};
5574
5575static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5576 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5577 gfp_t gfp_mask)
1da177e4 5578{
a5d16a4d
TM		 5579 struct nfs4_lockdata *p;
5580 struct inode *inode = lsp->ls_state->inode;
1da177e4 5581 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5582 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5583
8535b2be 5584 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5585 if (p == NULL)
5586 return NULL;
5587
5588 p->arg.fh = NFS_FH(inode);
5589 p->arg.fl = &p->fl;
8535b2be 5590 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5591 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5592 goto out_free;
b4019c0e
TM		 5593 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5594 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5595 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5596 goto out_free_seqid;
7539bbab 5597 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5598 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5599 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5600 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5601 p->lsp = lsp;
66179efe 5602 p->server = server;
a5d16a4d
TM		 5603 atomic_inc(&lsp->ls_count);
5604 p->ctx = get_nfs_open_context(ctx);
5605 memcpy(&p->fl, fl, sizeof(p->fl));
5606 return p;
2f74c0a0
TM		 5607out_free_seqid:
5608 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5609out_free:
5610 kfree(p);
5611 return NULL;
5612}
5613
5614static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5615{
5616 struct nfs4_lockdata *data = calldata;
5617 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5618
3110ff80 5619 dprintk("%s: begin!\n", __func__);
2f74c0a0 5620 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5621 goto out_wait;
a5d16a4d 5622 /* Do we need to do an open_to_lock_owner? */
6b447539 5623 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5624 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5625 goto out_release_lock_seqid;
8fe72bac 5626 }
425c1d4e
TM		 5627 nfs4_stateid_copy(&data->arg.open_stateid,
5628 &state->open_stateid);
a5d16a4d 5629 data->arg.new_lock_owner = 1;
c1d51931 5630 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5631 } else {
2f74c0a0 5632 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5633 nfs4_stateid_copy(&data->arg.lock_stateid,
5634 &data->lsp->ls_stateid);
5635 }
5d422301
TM		 5636 if (!nfs4_valid_open_stateid(state)) {
5637 data->rpc_status = -EBADF;
5638 task->tk_action = NULL;
5639 goto out_release_open_seqid;
5640 }
26e976a8 5641 data->timestamp = jiffies;
035168ab
TM		 5642 if (nfs4_setup_sequence(data->server,
5643 &data->arg.seq_args,
2240a9e2 5644 &data->res.seq_res,
d9afbd1b 5645 task) == 0)
66179efe 5646 return;
5d422301 5647out_release_open_seqid:
2240a9e2
TM		 5648 nfs_release_seqid(data->arg.open_seqid);
5649out_release_lock_seqid:
5650 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5651out_wait:
5652 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5653 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5654}
5655
a5d16a4d
TM		 5656static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5657{
5658 struct nfs4_lockdata *data = calldata;
39071e6f 5659 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5660
3110ff80 5661 dprintk("%s: begin!\n", __func__);
a5d16a4d 5662
14516c3a
TM		 5663 if (!nfs4_sequence_done(task, &data->res.seq_res))
5664 return;
66179efe 5665
a5d16a4d 5666 data->rpc_status = task->tk_status;
425c1d4e
TM		 5667 switch (task->tk_status) {
5668 case 0:
39071e6f
TM		 5669 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode),
5670 data->timestamp);
c69899a1
TM		 5671 if (data->arg.new_lock) {
5672 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
5673 if (do_vfs_lock(data->fl.fl_file, &data->fl) < 0) {
5674 rpc_restart_call_prepare(task);
5675 break;
5676 }
5677 }
39071e6f
TM		 5678 if (data->arg.new_lock_owner != 0) {
5679 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5680 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5681 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5682 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5683 rpc_restart_call_prepare(task);
425c1d4e
TM		 5684 break;
5685 case -NFS4ERR_BAD_STATEID:
5686 case -NFS4ERR_OLD_STATEID:
5687 case -NFS4ERR_STALE_STATEID:
5688 case -NFS4ERR_EXPIRED:
5689 if (data->arg.new_lock_owner != 0) {
5690 if (!nfs4_stateid_match(&data->arg.open_stateid,
5691 &lsp->ls_state->open_stateid))
5692 rpc_restart_call_prepare(task);
5693 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5694 &lsp->ls_stateid))
5695 rpc_restart_call_prepare(task);
a5d16a4d 5696 }
3110ff80 5697 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5698}
5699
5700static void nfs4_lock_release(void *calldata)
5701{
5702 struct nfs4_lockdata *data = calldata;
5703
3110ff80 5704 dprintk("%s: begin!\n", __func__);
2f74c0a0 5705 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5706 if (data->cancelled != 0) {
5707 struct rpc_task *task;
5708 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5709 data->arg.lock_seqid);
5710 if (!IS_ERR(task))
bf294b41 5711 rpc_put_task_async(task);
3110ff80 5712 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5713 } else
5714 nfs_free_seqid(data->arg.lock_seqid);
5715 nfs4_put_lock_state(data->lsp);
5716 put_nfs_open_context(data->ctx);
5717 kfree(data);
3110ff80 5718 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5719}
5720
5721static const struct rpc_call_ops nfs4_lock_ops = {
5722 .rpc_call_prepare = nfs4_lock_prepare,
5723 .rpc_call_done = nfs4_lock_done,
5724 .rpc_release = nfs4_lock_release,
5725};
5726
2bee72a6
TM		 5727static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5728{
2bee72a6
TM		 5729 switch (error) {
5730 case -NFS4ERR_ADMIN_REVOKED:
5731 case -NFS4ERR_BAD_STATEID:
ecac799a 5732 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5733 if (new_lock_owner != 0 ||
795a88c9 5734 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5735 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5736 break;
5737 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5738 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5739 case -NFS4ERR_EXPIRED:
5740 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5741 };
5742}
5743
afe6c27c 5744static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5745{
5746 struct nfs4_lockdata *data;
5747 struct rpc_task *task;
5138fde0
TM		 5748 struct rpc_message msg = {
5749 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5750 .rpc_cred = state->owner->so_cred,
5751 };
c970aa85
TM		 5752 struct rpc_task_setup task_setup_data = {
5753 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5754 .rpc_message = &msg,
c970aa85 5755 .callback_ops = &nfs4_lock_ops,
101070ca 5756 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5757 .flags = RPC_TASK_ASYNC,
5758 };
a5d16a4d
TM		 5759 int ret;
5760
3110ff80 5761 dprintk("%s: begin!\n", __func__);
cd3758e3 5762 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5763 fl->fl_u.nfs4_fl.owner,
5764 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5765 if (data == NULL)
5766 return -ENOMEM;
5767 if (IS_SETLKW(cmd))
5768 data->arg.block = 1;
a9c92d6b 5769 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5770 msg.rpc_argp = &data->arg;
5771 msg.rpc_resp = &data->res;
c970aa85 5772 task_setup_data.callback_data = data;
8fe72bac
TM		 5773 if (recovery_type > NFS_LOCK_NEW) {
5774 if (recovery_type == NFS_LOCK_RECLAIM)
5775 data->arg.reclaim = NFS_LOCK_RECLAIM;
5776 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 5777 } else
5778 data->arg.new_lock = 1;
c970aa85 5779 task = rpc_run_task(&task_setup_data);
7a1218a2 5780 if (IS_ERR(task))
a5d16a4d 5781 return PTR_ERR(task);
a5d16a4d
TM		 5782 ret = nfs4_wait_for_completion_rpc_task(task);
5783 if (ret == 0) {
5784 ret = data->rpc_status;
2bee72a6
TM		 5785 if (ret)
5786 nfs4_handle_setlk_error(data->server, data->lsp,
5787 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5788 } else
5789 data->cancelled = 1;
e6b3c4db 5790 rpc_put_task(task);
3110ff80 5791 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5792 return ret;
1da177e4
LT		 5793}
5794
5795static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5796{
202b50dc 5797 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5798 struct nfs4_exception exception = {
5799 .inode = state->inode,
5800 };
202b50dc
TM		 5801 int err;
5802
5803 do {
42a2d13e
TM		 5804 /* Cache the lock if possible... */
5805 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5806 return 0;
afe6c27c 5807 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5808 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5809 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5810 break;
5811 nfs4_handle_exception(server, err, &exception);
5812 } while (exception.retry);
5813 return err;
1da177e4
LT		 5814}
5815
5816static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5817{
202b50dc 5818 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5819 struct nfs4_exception exception = {
5820 .inode = state->inode,
5821 };
202b50dc
TM		 5822 int err;
5823
6bfc93ef
TM		 5824 err = nfs4_set_lock_state(state, request);
5825 if (err != 0)
5826 return err;
f6de7a39 5827 if (!recover_lost_locks) {
ef1820f9
N		 5828 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5829 return 0;
5830 }
202b50dc 5831 do {
42a2d13e
TM		 5832 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5833 return 0;
afe6c27c 5834 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5835 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5836 switch (err) {
5837 default:
5838 goto out;
5839 case -NFS4ERR_GRACE:
5840 case -NFS4ERR_DELAY:
5841 nfs4_handle_exception(server, err, &exception);
5842 err = 0;
5843 }
202b50dc 5844 } while (exception.retry);
a9ed2e25 5845out:
202b50dc 5846 return err;
1da177e4
LT		 5847}
5848
f062eb6c 5849#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5850/**
5851 * nfs41_check_expired_locks - possibly free a lock stateid
5852 *
5853 * @state: NFSv4 state for an inode
5854 *
5855 * Returns NFS_OK if recovery for this stateid is now finished.
5856 * Otherwise a negative NFS4ERR value is returned.
5857 */
b01dd1d8 5858static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5859{
eb64cf96 5860 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5861 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5862 struct nfs_server *server = NFS_SERVER(state->inode);
5863
b01dd1d8 5864 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5865 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5866 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5867
5868 status = nfs41_test_stateid(server,
5869 &lsp->ls_stateid,
5870 cred);
08cb47fa 5871 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5872 if (status != NFS_OK) {
3e60ffdd
CL		 5873 /* Free the stateid unless the server
5874 * informs us the stateid is unrecognized. */
89af2739
CL		 5875 if (status != -NFS4ERR_BAD_STATEID)
5876 nfs41_free_stateid(server,
ab7cb0df
TM		 5877 &lsp->ls_stateid,
5878 cred);
795a88c9 5879 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5880 ret = status;
5881 }
5882 }
5883 };
5884
5885 return ret;
5886}
5887
5888static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5889{
5890 int status = NFS_OK;
5891
5892 if (test_bit(LK_STATE_IN_USE, &state->flags))
5893 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5894 if (status != NFS_OK)
5895 status = nfs4_lock_expired(state, request);
5896 return status;
f062eb6c
BS		 5897}
5898#endif
5899
1da177e4
LT		 5900static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5901{
19e03c57 5902 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5903 unsigned char fl_flags = request->fl_flags;
8e469ebd 5904 int status = -ENOLCK;
1da177e4 5905
8e469ebd
TM		 5906 if ((fl_flags & FL_POSIX) &&
5907 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5908 goto out;
6bfc93ef 5909 /* Is this a delegated open? */
6bfc93ef
TM		 5910 status = nfs4_set_lock_state(state, request);
5911 if (status != 0)
5912 goto out;
01c3b861
TM		 5913 request->fl_flags |= FL_ACCESS;
5914 status = do_vfs_lock(request->fl_file, request);
5915 if (status < 0)
5916 goto out;
19e03c57 5917 down_read(&nfsi->rwsem);
01c3b861 5918 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5919 /* Yes: cache locks! */
01c3b861 5920 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5921 request->fl_flags = fl_flags & ~FL_SLEEP;
5922 status = do_vfs_lock(request->fl_file, request);
c69899a1 5923 up_read(&nfsi->rwsem);
9a99af49 5924 goto out;
9a99af49 5925 }
19e03c57 5926 up_read(&nfsi->rwsem);
c69899a1 5927 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 5928out:
5929 request->fl_flags = fl_flags;
1da177e4
LT		 5930 return status;
5931}
5932
5933static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5934{
a1d0b5ee
TM		 5935 struct nfs4_exception exception = {
5936 .state = state,
05ffe24f 5937 .inode = state->inode,
a1d0b5ee 5938 };
1da177e4
LT		 5939 int err;
5940
5941 do {
965b5d67 5942 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5943 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5944 if (err == -NFS4ERR_DENIED)
5945 err = -EAGAIN;
1da177e4 5946 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5947 err, &exception);
1da177e4
LT		 5948 } while (exception.retry);
5949 return err;
5950}
5951
5952static int
5953nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5954{
5955 struct nfs_open_context *ctx;
5956 struct nfs4_state *state;
5957 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5958 int status;
5959
5960 /* verify open state */
cd3758e3 5961 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5962 state = ctx->state;
5963
5964 if (request->fl_start < 0 || request->fl_end < 0)
5965 return -EINVAL;
5966
d953126a
TM		 5967 if (IS_GETLK(cmd)) {
5968 if (state != NULL)
5969 return nfs4_proc_getlk(state, F_GETLK, request);
5970 return 0;
5971 }
1da177e4
LT		 5972
5973 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5974 return -EINVAL;
5975
d953126a
TM		 5976 if (request->fl_type == F_UNLCK) {
5977 if (state != NULL)
5978 return nfs4_proc_unlck(state, cmd, request);
5979 return 0;
5980 }
1da177e4 5981
d953126a
TM		 5982 if (state == NULL)
5983 return -ENOLCK;
55725513
TM		 5984 /*
5985 * Don't rely on the VFS having checked the file open mode,
5986 * since it won't do this for flock() locks.
5987 */
f44106e2 5988 switch (request->fl_type) {
55725513
TM		 5989 case F_RDLCK:
5990 if (!(filp->f_mode & FMODE_READ))
5991 return -EBADF;
5992 break;
5993 case F_WRLCK:
5994 if (!(filp->f_mode & FMODE_WRITE))
5995 return -EBADF;
5996 }
5997
1da177e4
LT		 5998 do {
5999 status = nfs4_proc_setlk(state, cmd, request);
6000 if ((status != -EAGAIN) || IS_SETLK(cmd))
6001 break;
6002 timeout = nfs4_set_lock_task_retry(timeout);
6003 status = -ERESTARTSYS;
6004 if (signalled())
6005 break;
6006 } while(status < 0);
1da177e4
LT		 6007 return status;
6008}
6009
db4f2e63 6010int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6011{
6012 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6013 int err;
6014
6015 err = nfs4_set_lock_state(state, fl);
6016 if (err != 0)
db4f2e63 6017 return err;
4a706fa0 6018 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6019 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6020}
6b3b5496 6021
cf470c3e
TM		 6022struct nfs_release_lockowner_data {
6023 struct nfs4_lock_state *lsp;
5ae67c4f 6024 struct nfs_server *server;
cf470c3e 6025 struct nfs_release_lockowner_args args;
b7e63a10 6026 struct nfs_release_lockowner_res res;
60ea6812 6027 unsigned long timestamp;
cf470c3e
TM		 6028};
6029
fbd4bfd1
CL		 6030static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6031{
6032 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6033 struct nfs_server *server = data->server;
cb04ad2a
PT		 6034 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6035 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6036 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6037 data->timestamp = jiffies;
fbd4bfd1
CL		 6038}
6039
6040static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6041{
6042 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6043 struct nfs_server *server = data->server;
6044
b7e63a10 6045 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6046
6047 switch (task->tk_status) {
6048 case 0:
6049 renew_lease(server, data->timestamp);
6050 break;
6051 case -NFS4ERR_STALE_CLIENTID:
6052 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6053 nfs4_schedule_lease_recovery(server->nfs_client);
6054 break;
60ea6812
CL		 6055 case -NFS4ERR_LEASE_MOVED:
6056 case -NFS4ERR_DELAY:
8478eaa1
N		 6057 if (nfs4_async_handle_error(task, server,
6058 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6059 rpc_restart_call_prepare(task);
6060 }
fbd4bfd1
CL		 6061}
6062
d3c7b7cc
TM		 6063static void nfs4_release_lockowner_release(void *calldata)
6064{
cf470c3e 6065 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6066 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6067 kfree(calldata);
6068}
6069
17280175 6070static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6071 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6072 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6073 .rpc_release = nfs4_release_lockowner_release,
6074};
6075
f1cdae87
JL		 6076static void
6077nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6078{
cf470c3e 6079 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6080 struct rpc_message msg = {
6081 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6082 };
6083
6084 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6085 return;
fbd4bfd1 6086
cf470c3e
TM		 6087 data = kmalloc(sizeof(*data), GFP_NOFS);
6088 if (!data)
f1cdae87 6089 return;
cf470c3e 6090 data->lsp = lsp;
5ae67c4f 6091 data->server = server;
cf470c3e
TM		 6092 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6093 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6094 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6095
cf470c3e 6096 msg.rpc_argp = &data->args;
b7e63a10
TM		 6097 msg.rpc_resp = &data->res;
6098 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6099 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6100}
6101
aa1870af
BF		 6102#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6103
64c2ce8b
AK		 6104static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6105 const void *buf, size_t buflen,
6106 int flags, int type)
6b3b5496 6107{
64c2ce8b
AK		 6108 if (strcmp(key, "") != 0)
6109 return -EINVAL;
4b580ee3 6110
64c2ce8b 6111 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6112}
6113
64c2ce8b
AK		 6114static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6115 void *buf, size_t buflen, int type)
6b3b5496 6116{
64c2ce8b
AK		 6117 if (strcmp(key, "") != 0)
6118 return -EINVAL;
aa1870af 6119
64c2ce8b 6120 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6121}
6122
64c2ce8b
AK		 6123static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6124 size_t list_len, const char *name,
6125 size_t name_len, int type)
6b3b5496 6126{
64c2ce8b 6127 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6128
096455a2
BF		 6129 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
6130 return 0;
64c2ce8b
AK		 6131
6132 if (list && len <= list_len)
6133 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6134 return len;
6b3b5496
BF		 6135}
6136
c9bccef6
DQ		 6137#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6138static inline int nfs4_server_supports_labels(struct nfs_server *server)
6139{
6140 return server->caps & NFS_CAP_SECURITY_LABEL;
6141}
6142
6143static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6144 const void *buf, size_t buflen,
6145 int flags, int type)
6146{
6147 if (security_ismaclabel(key))
6148 return nfs4_set_security_label(dentry, buf, buflen);
6149
6150 return -EOPNOTSUPP;
6151}
6152
6153static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6154 void *buf, size_t buflen, int type)
6155{
6156 if (security_ismaclabel(key))
6157 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
6158 return -EOPNOTSUPP;
6159}
6160
6161static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6162 size_t list_len, const char *name,
6163 size_t name_len, int type)
6164{
6165 size_t len = 0;
6166
6167 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
6168 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
6169 if (list && len <= list_len)
6170 security_inode_listsecurity(dentry->d_inode, list, len);
6171 }
6172 return len;
6173}
6174
6175static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6176 .prefix = XATTR_SECURITY_PREFIX,
6177 .list = nfs4_xattr_list_nfs4_label,
6178 .get = nfs4_xattr_get_nfs4_label,
6179 .set = nfs4_xattr_set_nfs4_label,
6180};
6181#endif
6182
6183
533eb461
AA		 6184/*
6185 * nfs_fhget will use either the mounted_on_fileid or the fileid
6186 */
69aaaae1
TM		 6187static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6188{
533eb461
AA		 6189 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6190 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6191 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6192 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6193 return;
6194
6195 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6196 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6197 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6198 fattr->nlink = 2;
6199}
6200
f05d147f
BS		 6201static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6202 const struct qstr *name,
6203 struct nfs4_fs_locations *fs_locations,
6204 struct page *page)
683b57b4
TM		 6205{
6206 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6207 u32 bitmask[3] = {
361e624f 6208 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6209 };
6210 struct nfs4_fs_locations_arg args = {
6211 .dir_fh = NFS_FH(dir),
c228fd3a 6212 .name = name,
683b57b4
TM		 6213 .page = page,
6214 .bitmask = bitmask,
6215 };
22958463
BH		 6216 struct nfs4_fs_locations_res res = {
6217 .fs_locations = fs_locations,
6218 };
683b57b4
TM		 6219 struct rpc_message msg = {
6220 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6221 .rpc_argp = &args,
22958463 6222 .rpc_resp = &res,
683b57b4
TM		 6223 };
6224 int status;
6225
3110ff80 6226 dprintk("%s: start\n", __func__);
533eb461
AA		 6227
6228 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6229 * is not supported */
6230 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6231 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6232 else
6233 bitmask[0] |= FATTR4_WORD0_FILEID;
6234
c228fd3a 6235 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6236 fs_locations->server = server;
830b8e33 6237 fs_locations->nlocations = 0;
f05d147f 6238 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6239 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6240 return status;
6241}
6242
f05d147f
BS		 6243int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6244 const struct qstr *name,
6245 struct nfs4_fs_locations *fs_locations,
6246 struct page *page)
db0a9593
BS		 6247{
6248 struct nfs4_exception exception = { };
6249 int err;
6250 do {
078ea3df
TM		 6251 err = _nfs4_proc_fs_locations(client, dir, name,
6252 fs_locations, page);
6253 trace_nfs4_get_fs_locations(dir, name, err);
6254 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6255 &exception);
6256 } while (exception.retry);
6257 return err;
6258}
6259
b03d735b
CL		 6260/*
6261 * This operation also signals the server that this client is
6262 * performing migration recovery. The server can stop returning
6263 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6264 * appended to this compound to identify the client ID which is
6265 * performing recovery.
6266 */
6267static int _nfs40_proc_get_locations(struct inode *inode,
6268 struct nfs4_fs_locations *locations,
6269 struct page *page, struct rpc_cred *cred)
6270{
6271 struct nfs_server *server = NFS_SERVER(inode);
6272 struct rpc_clnt *clnt = server->client;
6273 u32 bitmask[2] = {
6274 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6275 };
6276 struct nfs4_fs_locations_arg args = {
6277 .clientid = server->nfs_client->cl_clientid,
6278 .fh = NFS_FH(inode),
6279 .page = page,
6280 .bitmask = bitmask,
6281 .migration = 1, /* skip LOOKUP */
6282 .renew = 1, /* append RENEW */
6283 };
6284 struct nfs4_fs_locations_res res = {
6285 .fs_locations = locations,
6286 .migration = 1,
6287 .renew = 1,
6288 };
6289 struct rpc_message msg = {
6290 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6291 .rpc_argp = &args,
6292 .rpc_resp = &res,
6293 .rpc_cred = cred,
6294 };
6295 unsigned long now = jiffies;
6296 int status;
6297
6298 nfs_fattr_init(&locations->fattr);
6299 locations->server = server;
6300 locations->nlocations = 0;
6301
6302 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6303 nfs4_set_sequence_privileged(&args.seq_args);
6304 status = nfs4_call_sync_sequence(clnt, server, &msg,
6305 &args.seq_args, &res.seq_res);
6306 if (status)
6307 return status;
6308
6309 renew_lease(server, now);
6310 return 0;
6311}
6312
6313#ifdef CONFIG_NFS_V4_1
6314
6315/*
6316 * This operation also signals the server that this client is
6317 * performing migration recovery. The server can stop asserting
6318 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6319 * performing this operation is identified in the SEQUENCE
6320 * operation in this compound.
6321 *
6322 * When the client supports GETATTR(fs_locations_info), it can
6323 * be plumbed in here.
6324 */
6325static int _nfs41_proc_get_locations(struct inode *inode,
6326 struct nfs4_fs_locations *locations,
6327 struct page *page, struct rpc_cred *cred)
6328{
6329 struct nfs_server *server = NFS_SERVER(inode);
6330 struct rpc_clnt *clnt = server->client;
6331 u32 bitmask[2] = {
6332 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6333 };
6334 struct nfs4_fs_locations_arg args = {
6335 .fh = NFS_FH(inode),
6336 .page = page,
6337 .bitmask = bitmask,
6338 .migration = 1, /* skip LOOKUP */
6339 };
6340 struct nfs4_fs_locations_res res = {
6341 .fs_locations = locations,
6342 .migration = 1,
6343 };
6344 struct rpc_message msg = {
6345 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6346 .rpc_argp = &args,
6347 .rpc_resp = &res,
6348 .rpc_cred = cred,
6349 };
6350 int status;
6351
6352 nfs_fattr_init(&locations->fattr);
6353 locations->server = server;
6354 locations->nlocations = 0;
6355
6356 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6357 nfs4_set_sequence_privileged(&args.seq_args);
6358 status = nfs4_call_sync_sequence(clnt, server, &msg,
6359 &args.seq_args, &res.seq_res);
6360 if (status == NFS4_OK &&
6361 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6362 status = -NFS4ERR_LEASE_MOVED;
6363 return status;
6364}
6365
6366#endif /* CONFIG_NFS_V4_1 */
6367
6368/**
6369 * nfs4_proc_get_locations - discover locations for a migrated FSID
6370 * @inode: inode on FSID that is migrating
6371 * @locations: result of query
6372 * @page: buffer
6373 * @cred: credential to use for this operation
6374 *
6375 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6376 * operation failed, or a negative errno if a local error occurred.
6377 *
6378 * On success, "locations" is filled in, but if the server has
6379 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6380 * asserted.
6381 *
6382 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6383 * from this client that require migration recovery.
6384 */
6385int nfs4_proc_get_locations(struct inode *inode,
6386 struct nfs4_fs_locations *locations,
6387 struct page *page, struct rpc_cred *cred)
6388{
6389 struct nfs_server *server = NFS_SERVER(inode);
6390 struct nfs_client *clp = server->nfs_client;
6391 const struct nfs4_mig_recovery_ops *ops =
6392 clp->cl_mvops->mig_recovery_ops;
6393 struct nfs4_exception exception = { };
6394 int status;
6395
6396 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6397 (unsigned long long)server->fsid.major,
6398 (unsigned long long)server->fsid.minor,
6399 clp->cl_hostname);
6400 nfs_display_fhandle(NFS_FH(inode), __func__);
6401
6402 do {
6403 status = ops->get_locations(inode, locations, page, cred);
6404 if (status != -NFS4ERR_DELAY)
6405 break;
6406 nfs4_handle_exception(server, status, &exception);
6407 } while (exception.retry);
6408 return status;
6409}
6410
44c99933
CL		 6411/*
6412 * This operation also signals the server that this client is
6413 * performing "lease moved" recovery. The server can stop
6414 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6415 * is appended to this compound to identify the client ID which is
6416 * performing recovery.
6417 */
6418static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6419{
6420 struct nfs_server *server = NFS_SERVER(inode);
6421 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6422 struct rpc_clnt *clnt = server->client;
6423 struct nfs4_fsid_present_arg args = {
6424 .fh = NFS_FH(inode),
6425 .clientid = clp->cl_clientid,
6426 .renew = 1, /* append RENEW */
6427 };
6428 struct nfs4_fsid_present_res res = {
6429 .renew = 1,
6430 };
6431 struct rpc_message msg = {
6432 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6433 .rpc_argp = &args,
6434 .rpc_resp = &res,
6435 .rpc_cred = cred,
6436 };
6437 unsigned long now = jiffies;
6438 int status;
6439
6440 res.fh = nfs_alloc_fhandle();
6441 if (res.fh == NULL)
6442 return -ENOMEM;
6443
6444 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6445 nfs4_set_sequence_privileged(&args.seq_args);
6446 status = nfs4_call_sync_sequence(clnt, server, &msg,
6447 &args.seq_args, &res.seq_res);
6448 nfs_free_fhandle(res.fh);
6449 if (status)
6450 return status;
6451
6452 do_renew_lease(clp, now);
6453 return 0;
6454}
6455
6456#ifdef CONFIG_NFS_V4_1
6457
6458/*
6459 * This operation also signals the server that this client is
6460 * performing "lease moved" recovery. The server can stop asserting
6461 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6462 * this operation is identified in the SEQUENCE operation in this
6463 * compound.
6464 */
6465static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6466{
6467 struct nfs_server *server = NFS_SERVER(inode);
6468 struct rpc_clnt *clnt = server->client;
6469 struct nfs4_fsid_present_arg args = {
6470 .fh = NFS_FH(inode),
6471 };
6472 struct nfs4_fsid_present_res res = {
6473 };
6474 struct rpc_message msg = {
6475 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6476 .rpc_argp = &args,
6477 .rpc_resp = &res,
6478 .rpc_cred = cred,
6479 };
6480 int status;
6481
6482 res.fh = nfs_alloc_fhandle();
6483 if (res.fh == NULL)
6484 return -ENOMEM;
6485
6486 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6487 nfs4_set_sequence_privileged(&args.seq_args);
6488 status = nfs4_call_sync_sequence(clnt, server, &msg,
6489 &args.seq_args, &res.seq_res);
6490 nfs_free_fhandle(res.fh);
6491 if (status == NFS4_OK &&
6492 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6493 status = -NFS4ERR_LEASE_MOVED;
6494 return status;
6495}
6496
6497#endif /* CONFIG_NFS_V4_1 */
6498
6499/**
6500 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6501 * @inode: inode on FSID to check
6502 * @cred: credential to use for this operation
6503 *
6504 * Server indicates whether the FSID is present, moved, or not
6505 * recognized. This operation is necessary to clear a LEASE_MOVED
6506 * condition for this client ID.
6507 *
6508 * Returns NFS4_OK if the FSID is present on this server,
6509 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6510 * NFS4ERR code if some error occurred on the server, or a
6511 * negative errno if a local failure occurred.
6512 */
6513int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6514{
6515 struct nfs_server *server = NFS_SERVER(inode);
6516 struct nfs_client *clp = server->nfs_client;
6517 const struct nfs4_mig_recovery_ops *ops =
6518 clp->cl_mvops->mig_recovery_ops;
6519 struct nfs4_exception exception = { };
6520 int status;
6521
6522 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6523 (unsigned long long)server->fsid.major,
6524 (unsigned long long)server->fsid.minor,
6525 clp->cl_hostname);
6526 nfs_display_fhandle(NFS_FH(inode), __func__);
6527
6528 do {
6529 status = ops->fsid_present(inode, cred);
6530 if (status != -NFS4ERR_DELAY)
6531 break;
6532 nfs4_handle_exception(server, status, &exception);
6533 } while (exception.retry);
6534 return status;
6535}
6536
5ec16a85 6537/**
a5250def
WAA		 6538 * If 'use_integrity' is true and the state managment nfs_client
6539 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6540 * and the machine credential as per RFC3530bis and RFC5661 Security
6541 * Considerations sections. Otherwise, just use the user cred with the
6542 * filesystem's rpc_client.
5ec16a85 6543 */
a5250def 6544static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6545{
6546 int status;
6547 struct nfs4_secinfo_arg args = {
6548 .dir_fh = NFS_FH(dir),
6549 .name = name,
6550 };
6551 struct nfs4_secinfo_res res = {
6552 .flavors = flavors,
6553 };
6554 struct rpc_message msg = {
6555 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6556 .rpc_argp = &args,
6557 .rpc_resp = &res,
6558 };
a5250def 6559 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6560 struct rpc_cred *cred = NULL;
a5250def
WAA		 6561
6562 if (use_integrity) {
6563 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6564 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6565 msg.rpc_cred = cred;
a5250def 6566 }
5a5ea0d4
BS		 6567
6568 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6569
6570 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6571 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6572
a5250def
WAA		 6573 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6574 &res.seq_res, 0);
5a5ea0d4 6575 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6576
7cb852df
WAA		 6577 if (cred)
6578 put_rpccred(cred);
a5250def 6579
5a5ea0d4
BS		 6580 return status;
6581}
6582
72de53ec
BS		 6583int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6584 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6585{
6586 struct nfs4_exception exception = { };
6587 int err;
6588 do {
a5250def
WAA		 6589 err = -NFS4ERR_WRONGSEC;
6590
6591 /* try to use integrity protection with machine cred */
6592 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6593 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6594
6595 /*
6596 * if unable to use integrity protection, or SECINFO with
6597 * integrity protection returns NFS4ERR_WRONGSEC (which is
6598 * disallowed by spec, but exists in deployed servers) use
6599 * the current filesystem's rpc_client and the user cred.
6600 */
6601 if (err == -NFS4ERR_WRONGSEC)
6602 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6603
078ea3df
TM		 6604 trace_nfs4_secinfo(dir, name, err);
6605 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6606 &exception);
6607 } while (exception.retry);
6608 return err;
6609}
6610
557134a3 6611#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6612/*
6613 * Check the exchange flags returned by the server for invalid flags, having
6614 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6615 * DS flags set.
6616 */
6617static int nfs4_check_cl_exchange_flags(u32 flags)
6618{
6619 if (flags & ~EXCHGID4_FLAG_MASK_R)
6620 goto out_inval;
6621 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6622 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6623 goto out_inval;
6624 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6625 goto out_inval;
6626 return NFS_OK;
6627out_inval:
6628 return -NFS4ERR_INVAL;
6629}
6630
78fe0f41 6631static bool
79d4e1f0
CL		 6632nfs41_same_server_scope(struct nfs41_server_scope *a,
6633 struct nfs41_server_scope *b)
78fe0f41
WAA		 6634{
6635 if (a->server_scope_sz == b->server_scope_sz &&
6636 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6637 return true;
6638
6639 return false;
6640}
6641
7c44f1ae
WAA		 6642/*
6643 * nfs4_proc_bind_conn_to_session()
6644 *
6645 * The 4.1 client currently uses the same TCP connection for the
6646 * fore and backchannel.
6647 */
2cf047c9 6648int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6649{
6650 int status;
71a097c6
TM		 6651 struct nfs41_bind_conn_to_session_args args = {
6652 .client = clp,
6653 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6654 };
7c44f1ae
WAA		 6655 struct nfs41_bind_conn_to_session_res res;
6656 struct rpc_message msg = {
6657 .rpc_proc =
6658 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 6659 .rpc_argp = &args,
7c44f1ae 6660 .rpc_resp = &res,
2cf047c9 6661 .rpc_cred = cred,
7c44f1ae
WAA		 6662 };
6663
6664 dprintk("--> %s\n", __func__);
7c44f1ae 6665
71a097c6
TM		 6666 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6667 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6668 args.dir = NFS4_CDFC4_FORE;
7c44f1ae
WAA		 6669
6670 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6671 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 6672 if (status == 0) {
71a097c6 6673 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 6674 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6675 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6676 status = -EIO;
71a097c6 6677 goto out;
7c44f1ae 6678 }
71a097c6 6679 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 6680 dprintk("NFS: %s: Unexpected direction from server\n",
6681 __func__);
6682 status = -EIO;
71a097c6 6683 goto out;
7c44f1ae 6684 }
71a097c6 6685 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 6686 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6687 __func__);
6688 status = -EIO;
71a097c6 6689 goto out;
7c44f1ae
WAA		 6690 }
6691 }
7c44f1ae
WAA		 6692out:
6693 dprintk("<-- %s status= %d\n", __func__, status);
6694 return status;
6695}
6696
99fe60d0 6697/*
fa940720
WAA		 6698 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6699 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6700 */
6701static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6702 .how = SP4_MACH_CRED,
6703 .enforce.u.words = {
6704 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6705 1 << (OP_EXCHANGE_ID - 32) |
6706 1 << (OP_CREATE_SESSION - 32) |
6707 1 << (OP_DESTROY_SESSION - 32) |
6708 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6709 },
6710 .allow.u.words = {
6711 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6712 1 << (OP_LOCKU) |
6713 1 << (OP_COMMIT),
8b5bee2e 6714 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6715 1 << (OP_SECINFO_NO_NAME - 32) |
6716 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6717 1 << (OP_FREE_STATEID - 32) |
6718 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6719 }
6720};
6721
6722/*
6723 * Select the state protection mode for client `clp' given the server results
6724 * from exchange_id in `sp'.
99fe60d0 6725 *
2031cd1a
WAA		 6726 * Returns 0 on success, negative errno otherwise.
6727 */
6728static int nfs4_sp4_select_mode(struct nfs_client *clp,
6729 struct nfs41_state_protection *sp)
6730{
6731 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6732 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6733 1 << (OP_EXCHANGE_ID - 32) |
6734 1 << (OP_CREATE_SESSION - 32) |
6735 1 << (OP_DESTROY_SESSION - 32) |
6736 1 << (OP_DESTROY_CLIENTID - 32)
6737 };
6738 unsigned int i;
6739
6740 if (sp->how == SP4_MACH_CRED) {
6741 /* Print state protect result */
6742 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6743 for (i = 0; i <= LAST_NFS4_OP; i++) {
6744 if (test_bit(i, sp->enforce.u.longs))
6745 dfprintk(MOUNT, " enforce op %d\n", i);
6746 if (test_bit(i, sp->allow.u.longs))
6747 dfprintk(MOUNT, " allow op %d\n", i);
6748 }
6749
6750 /* make sure nothing is on enforce list that isn't supported */
6751 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6752 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6753 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6754 return -EINVAL;
6755 }
6756 }
6757
6758 /*
6759 * Minimal mode - state operations are allowed to use machine
6760 * credential. Note this already happens by default, so the
6761 * client doesn't have to do anything more than the negotiation.
6762 *
6763 * NOTE: we don't care if EXCHANGE_ID is in the list -
6764 * we're already using the machine cred for exchange_id
6765 * and will never use a different cred.
6766 */
6767 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6768 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6769 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6770 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6771 dfprintk(MOUNT, "sp4_mach_cred:\n");
6772 dfprintk(MOUNT, " minimal mode enabled\n");
6773 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6774 } else {
6775 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6776 return -EINVAL;
6777 }
fa940720
WAA		 6778
6779 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6780 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6781 dfprintk(MOUNT, " cleanup mode enabled\n");
6782 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6783 }
8b5bee2e
WAA		 6784
6785 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6786 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6787 dfprintk(MOUNT, " secinfo mode enabled\n");
6788 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6789 }
3787d506
WAA		 6790
6791 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6792 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6793 dfprintk(MOUNT, " stateid mode enabled\n");
6794 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6795 }
8c21c62c
WAA		 6796
6797 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6798 dfprintk(MOUNT, " write mode enabled\n");
6799 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6800 }
6801
6802 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6803 dfprintk(MOUNT, " commit mode enabled\n");
6804 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6805 }
2031cd1a
WAA		 6806 }
6807
6808 return 0;
6809}
6810
6811/*
6812 * _nfs4_proc_exchange_id()
6bbb4ae8 6813 *
2031cd1a 6814 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6815 */
2031cd1a
WAA		 6816static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6817 u32 sp4_how)
99fe60d0
BH		 6818{
6819 nfs4_verifier verifier;
6820 struct nfs41_exchange_id_args args = {
cd93710e 6821 .verifier = &verifier,
99fe60d0 6822 .client = clp,
cd3fadec 6823#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6824 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6825 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6826 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6827#else
6828 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6829 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6830#endif
99fe60d0
BH		 6831 };
6832 struct nfs41_exchange_id_res res = {
32b01310 6833 0
99fe60d0
BH		 6834 };
6835 int status;
6836 struct rpc_message msg = {
6837 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6838 .rpc_argp = &args,
6839 .rpc_resp = &res,
6840 .rpc_cred = cred,
6841 };
99fe60d0 6842
f092075d 6843 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6844 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6845 sizeof(args.id));
6bbb4ae8
CL		 6846 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6847 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6848 args.id_len, args.id);
99fe60d0 6849
acdeb69d 6850 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6851 GFP_NOFS);
acdeb69d 6852 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6853 status = -ENOMEM;
6854 goto out;
6855 }
78fe0f41 6856
79d4e1f0 6857 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6858 GFP_NOFS);
177313f1 6859 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6860 status = -ENOMEM;
acdeb69d 6861 goto out_server_owner;
abe9a6d5 6862 }
78fe0f41 6863
bbafffd2 6864 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6865 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6866 status = -ENOMEM;
6867 goto out_server_scope;
6868 }
6869
2031cd1a
WAA		 6870 switch (sp4_how) {
6871 case SP4_NONE:
6872 args.state_protect.how = SP4_NONE;
6873 break;
6874
6875 case SP4_MACH_CRED:
6876 args.state_protect = nfs4_sp4_mach_cred_request;
6877 break;
6878
6879 default:
6880 /* unsupported! */
6881 WARN_ON_ONCE(1);
6882 status = -EINVAL;
6883 goto out_server_scope;
6884 }
6885
1bd714f2 6886 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6887 trace_nfs4_exchange_id(clp, status);
177313f1 6888 if (status == 0)
32b01310 6889 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6890
2031cd1a
WAA		 6891 if (status == 0)
6892 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6893
acdeb69d 6894 if (status == 0) {
32b01310
TM		 6895 clp->cl_clientid = res.clientid;
6896 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6897 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6898 clp->cl_seqid = res.seqid;
6899
acdeb69d
CL		 6900 kfree(clp->cl_serverowner);
6901 clp->cl_serverowner = res.server_owner;
6902 res.server_owner = NULL;
78fe0f41 6903
7d2ed9ac 6904 /* use the most recent implementation id */
59155546
CL		 6905 kfree(clp->cl_implid);
6906 clp->cl_implid = res.impl_id;
7d2ed9ac 6907
177313f1 6908 if (clp->cl_serverscope != NULL &&
79d4e1f0 6909 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6910 res.server_scope)) {
6911 dprintk("%s: server_scope mismatch detected\n",
6912 __func__);
6913 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6914 kfree(clp->cl_serverscope);
6915 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6916 }
6917
177313f1 6918 if (clp->cl_serverscope == NULL) {
79d4e1f0 6919 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6920 goto out;
6921 }
32b01310
TM		 6922 } else
6923 kfree(res.impl_id);
7d2ed9ac 6924
acdeb69d
CL		 6925out_server_owner:
6926 kfree(res.server_owner);
7d2ed9ac 6927out_server_scope:
abe9a6d5
WAA		 6928 kfree(res.server_scope);
6929out:
177313f1 6930 if (clp->cl_implid != NULL)
6bbb4ae8 6931 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6932 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6933 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6934 clp->cl_implid->date.seconds,
6935 clp->cl_implid->date.nseconds);
6bbb4ae8 6936 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6937 return status;
6938}
6939
2031cd1a
WAA		 6940/*
6941 * nfs4_proc_exchange_id()
6942 *
6943 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6944 *
6945 * Since the clientid has expired, all compounds using sessions
6946 * associated with the stale clientid will be returning
6947 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6948 * be in some phase of session reset.
6949 *
6950 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6951 */
6952int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6953{
6954 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6955 int status;
6956
6957 /* try SP4_MACH_CRED if krb5i/p */
6958 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6959 authflavor == RPC_AUTH_GSS_KRB5P) {
6960 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6961 if (!status)
6962 return 0;
6963 }
6964
6965 /* try SP4_NONE */
6966 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6967}
6968
66245539
TM		 6969static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6970 struct rpc_cred *cred)
6971{
6972 struct rpc_message msg = {
6973 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6974 .rpc_argp = clp,
6975 .rpc_cred = cred,
6976 };
6977 int status;
6978
6979 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6980 trace_nfs4_destroy_clientid(clp, status);
66245539 6981 if (status)
02c67525 6982 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6983 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6984 return status;
6985}
6986
6987static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6988 struct rpc_cred *cred)
6989{
6990 unsigned int loop;
6991 int ret;
6992
6993 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6994 ret = _nfs4_proc_destroy_clientid(clp, cred);
6995 switch (ret) {
6996 case -NFS4ERR_DELAY:
6997 case -NFS4ERR_CLIENTID_BUSY:
6998 ssleep(1);
6999 break;
7000 default:
7001 return ret;
7002 }
7003 }
7004 return 0;
7005}
7006
7007int nfs4_destroy_clientid(struct nfs_client *clp)
7008{
7009 struct rpc_cred *cred;
7010 int ret = 0;
7011
7012 if (clp->cl_mvops->minor_version < 1)
7013 goto out;
7014 if (clp->cl_exchange_flags == 0)
7015 goto out;
05f4c350
CL		 7016 if (clp->cl_preserve_clid)
7017 goto out;
73d8bde5 7018 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7019 ret = nfs4_proc_destroy_clientid(clp, cred);
7020 if (cred)
7021 put_rpccred(cred);
7022 switch (ret) {
7023 case 0:
7024 case -NFS4ERR_STALE_CLIENTID:
7025 clp->cl_exchange_flags = 0;
7026 }
7027out:
7028 return ret;
7029}
7030
2050f0cc
AA		 7031struct nfs4_get_lease_time_data {
7032 struct nfs4_get_lease_time_args *args;
7033 struct nfs4_get_lease_time_res *res;
7034 struct nfs_client *clp;
7035};
7036
7037static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7038 void *calldata)
7039{
2050f0cc
AA		 7040 struct nfs4_get_lease_time_data *data =
7041 (struct nfs4_get_lease_time_data *)calldata;
7042
7043 dprintk("--> %s\n", __func__);
7044 /* just setup sequence, do not trigger session recovery
7045 since we're invoked within one */
d9afbd1b
TM		 7046 nfs41_setup_sequence(data->clp->cl_session,
7047 &data->args->la_seq_args,
7048 &data->res->lr_seq_res,
7049 task);
2050f0cc
AA		 7050 dprintk("<-- %s\n", __func__);
7051}
7052
7053/*
7054 * Called from nfs4_state_manager thread for session setup, so don't recover
7055 * from sequence operation or clientid errors.
7056 */
7057static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7058{
7059 struct nfs4_get_lease_time_data *data =
7060 (struct nfs4_get_lease_time_data *)calldata;
7061
7062 dprintk("--> %s\n", __func__);
14516c3a
TM		 7063 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7064 return;
2050f0cc
AA		 7065 switch (task->tk_status) {
7066 case -NFS4ERR_DELAY:
7067 case -NFS4ERR_GRACE:
7068 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7069 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7070 task->tk_status = 0;
a8a4ae3a
AA		 7071 /* fall through */
7072 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7073 rpc_restart_call_prepare(task);
2050f0cc
AA		 7074 return;
7075 }
2050f0cc
AA		 7076 dprintk("<-- %s\n", __func__);
7077}
7078
17280175 7079static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7080 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7081 .rpc_call_done = nfs4_get_lease_time_done,
7082};
7083
7084int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7085{
7086 struct rpc_task *task;
7087 struct nfs4_get_lease_time_args args;
7088 struct nfs4_get_lease_time_res res = {
7089 .lr_fsinfo = fsinfo,
7090 };
7091 struct nfs4_get_lease_time_data data = {
7092 .args = &args,
7093 .res = &res,
7094 .clp = clp,
7095 };
7096 struct rpc_message msg = {
7097 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7098 .rpc_argp = &args,
7099 .rpc_resp = &res,
7100 };
7101 struct rpc_task_setup task_setup = {
7102 .rpc_client = clp->cl_rpcclient,
7103 .rpc_message = &msg,
7104 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7105 .callback_data = &data,
7106 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7107 };
7108 int status;
7109
a9c92d6b 7110 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7111 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7112 dprintk("--> %s\n", __func__);
7113 task = rpc_run_task(&task_setup);
7114
7115 if (IS_ERR(task))
7116 status = PTR_ERR(task);
7117 else {
7118 status = task->tk_status;
7119 rpc_put_task(task);
7120 }
7121 dprintk("<-- %s return %d\n", __func__, status);
7122
7123 return status;
7124}
7125
fc931582
AA		 7126/*
7127 * Initialize the values to be used by the client in CREATE_SESSION
7128 * If nfs4_init_session set the fore channel request and response sizes,
7129 * use them.
7130 *
7131 * Set the back channel max_resp_sz_cached to zero to force the client to
7132 * always set csa_cachethis to FALSE because the current implementation
7133 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7134 */
7135static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7136{
18aad3d5
AA		 7137 unsigned int max_rqst_sz, max_resp_sz;
7138
7139 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7140 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7141
fc931582 7142 /* Fore channel attributes */
18aad3d5
AA		 7143 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7144 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7145 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7146 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7147
7148 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7149 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7150 __func__,
7151 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7152 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7153
7154 /* Back channel attributes */
fc931582
AA		 7155 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7156 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7157 args->bc_attrs.max_resp_sz_cached = 0;
7158 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7159 args->bc_attrs.max_reqs = 1;
7160
7161 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7162 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7163 __func__,
7164 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7165 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7166 args->bc_attrs.max_reqs);
7167}
7168
79969dd1
TM		 7169static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7170 struct nfs41_create_session_res *res)
8d35301d 7171{
43c2e885 7172 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7173 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7174
43c2e885
BF		 7175 if (rcvd->max_resp_sz > sent->max_resp_sz)
7176 return -EINVAL;
7177 /*
7178 * Our requested max_ops is the minimum we need; we're not
7179 * prepared to break up compounds into smaller pieces than that.
7180 * So, no point even trying to continue if the server won't
7181 * cooperate:
7182 */
7183 if (rcvd->max_ops < sent->max_ops)
7184 return -EINVAL;
7185 if (rcvd->max_reqs == 0)
7186 return -EINVAL;
b4b9a0c1
VG		 7187 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7188 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7189 return 0;
8d35301d
AA		 7190}
7191
79969dd1
TM		 7192static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7193 struct nfs41_create_session_res *res)
43c2e885
BF		 7194{
7195 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7196 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7197
b1c0df5f
TM		 7198 if (!(res->flags & SESSION4_BACK_CHAN))
7199 goto out;
43c2e885
BF		 7200 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7201 return -EINVAL;
7202 if (rcvd->max_resp_sz < sent->max_resp_sz)
7203 return -EINVAL;
7204 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7205 return -EINVAL;
7206 /* These would render the backchannel useless: */
b4b9a0c1 7207 if (rcvd->max_ops != sent->max_ops)
43c2e885 7208 return -EINVAL;
b4b9a0c1 7209 if (rcvd->max_reqs != sent->max_reqs)
43c2e885 7210 return -EINVAL;
b1c0df5f 7211out:
43c2e885
BF		 7212 return 0;
7213}
8d35301d 7214
8d35301d 7215static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7216 struct nfs41_create_session_res *res)
8d35301d 7217{
43c2e885 7218 int ret;
8d35301d 7219
79969dd1 7220 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7221 if (ret)
7222 return ret;
79969dd1
TM		 7223 return nfs4_verify_back_channel_attrs(args, res);
7224}
7225
7226static void nfs4_update_session(struct nfs4_session *session,
7227 struct nfs41_create_session_res *res)
7228{
7229 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
7230 session->flags = res->flags;
7231 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7232 if (res->flags & SESSION4_BACK_CHAN)
7233 memcpy(&session->bc_attrs, &res->bc_attrs,
7234 sizeof(session->bc_attrs));
8d35301d
AA		 7235}
7236
848f5bda
TM		 7237static int _nfs4_proc_create_session(struct nfs_client *clp,
7238 struct rpc_cred *cred)
fc931582
AA		 7239{
7240 struct nfs4_session *session = clp->cl_session;
7241 struct nfs41_create_session_args args = {
7242 .client = clp,
79969dd1
TM		 7243 .clientid = clp->cl_clientid,
7244 .seqid = clp->cl_seqid,
fc931582
AA		 7245 .cb_program = NFS4_CALLBACK,
7246 };
79969dd1
TM		 7247 struct nfs41_create_session_res res;
7248
fc931582
AA		 7249 struct rpc_message msg = {
7250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7251 .rpc_argp = &args,
7252 .rpc_resp = &res,
848f5bda 7253 .rpc_cred = cred,
fc931582
AA		 7254 };
7255 int status;
7256
7257 nfs4_init_channel_attrs(&args);
0f91421e 7258 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7259
1bd714f2 7260 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7261 trace_nfs4_create_session(clp, status);
fc931582 7262
43095d39 7263 if (!status) {
8d35301d 7264 /* Verify the session's negotiated channel_attrs values */
79969dd1 7265 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7266 /* Increment the clientid slot sequence id */
79969dd1
TM		 7267 if (clp->cl_seqid == res.seqid)
7268 clp->cl_seqid++;
7269 if (status)
7270 goto out;
7271 nfs4_update_session(session, &res);
fc931582 7272 }
79969dd1 7273out:
fc931582
AA		 7274 return status;
7275}
7276
7277/*
7278 * Issues a CREATE_SESSION operation to the server.
7279 * It is the responsibility of the caller to verify the session is
7280 * expired before calling this routine.
7281 */
848f5bda 7282int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7283{
7284 int status;
7285 unsigned *ptr;
fc931582
AA		 7286 struct nfs4_session *session = clp->cl_session;
7287
7288 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7289
848f5bda 7290 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7291 if (status)
7292 goto out;
7293
aacd5537
AA		 7294 /* Init or reset the session slot tables */
7295 status = nfs4_setup_session_slot_tables(session);
7296 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7297 if (status)
7298 goto out;
7299
7300 ptr = (unsigned *)&session->sess_id.data[0];
7301 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7302 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7303out:
7304 dprintk("<-- %s\n", __func__);
7305 return status;
7306}
7307
0f3e66c6
AA		 7308/*
7309 * Issue the over-the-wire RPC DESTROY_SESSION.
7310 * The caller must serialize access to this routine.
7311 */
848f5bda
TM		 7312int nfs4_proc_destroy_session(struct nfs4_session *session,
7313 struct rpc_cred *cred)
0f3e66c6 7314{
848f5bda
TM		 7315 struct rpc_message msg = {
7316 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7317 .rpc_argp = session,
7318 .rpc_cred = cred,
7319 };
0f3e66c6 7320 int status = 0;
0f3e66c6
AA		 7321
7322 dprintk("--> nfs4_proc_destroy_session\n");
7323
7324 /* session is still being setup */
7325 if (session->clp->cl_cons_state != NFS_CS_READY)
7326 return status;
7327
1bd714f2 7328 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7329 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7330
7331 if (status)
08106ac7 7332 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7333 "Session has been destroyed regardless...\n", status);
7334
7335 dprintk("<-- nfs4_proc_destroy_session\n");
7336 return status;
7337}
7338
fc01cea9
AA		 7339/*
7340 * Renew the cl_session lease.
7341 */
d5f8d3fe
TM		 7342struct nfs4_sequence_data {
7343 struct nfs_client *clp;
7344 struct nfs4_sequence_args args;
7345 struct nfs4_sequence_res res;
7346};
7347
dc96aef9
AB		 7348static void nfs41_sequence_release(void *data)
7349{
d5f8d3fe
TM		 7350 struct nfs4_sequence_data *calldata = data;
7351 struct nfs_client *clp = calldata->clp;
dc96aef9 7352
7135840f
AB		 7353 if (atomic_read(&clp->cl_count) > 1)
7354 nfs4_schedule_state_renewal(clp);
7355 nfs_put_client(clp);
d5f8d3fe 7356 kfree(calldata);
dc96aef9
AB		 7357}
7358
aa5190d0
TM		 7359static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7360{
7361 switch(task->tk_status) {
7362 case -NFS4ERR_DELAY:
aa5190d0
TM		 7363 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7364 return -EAGAIN;
7365 default:
0400a6b0 7366 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7367 }
7368 return 0;
7369}
7370
dc96aef9 7371static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7372{
d5f8d3fe
TM		 7373 struct nfs4_sequence_data *calldata = data;
7374 struct nfs_client *clp = calldata->clp;
fc01cea9 7375
14516c3a
TM		 7376 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7377 return;
fc01cea9 7378
c6d01c6f 7379 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7380 if (task->tk_status < 0) {
7381 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7382 if (atomic_read(&clp->cl_count) == 1)
7383 goto out;
fc01cea9 7384
aa5190d0
TM		 7385 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7386 rpc_restart_call_prepare(task);
fc01cea9
AA		 7387 return;
7388 }
7389 }
fc01cea9 7390 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7391out:
fc01cea9
AA		 7392 dprintk("<-- %s\n", __func__);
7393}
7394
7395static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7396{
d5f8d3fe
TM		 7397 struct nfs4_sequence_data *calldata = data;
7398 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7399 struct nfs4_sequence_args *args;
7400 struct nfs4_sequence_res *res;
7401
fc01cea9
AA		 7402 args = task->tk_msg.rpc_argp;
7403 res = task->tk_msg.rpc_resp;
7404
d9afbd1b 7405 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7406}
7407
7408static const struct rpc_call_ops nfs41_sequence_ops = {
7409 .rpc_call_done = nfs41_sequence_call_done,
7410 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7411 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7412};
7413
8fe72bac
TM		 7414static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7415 struct rpc_cred *cred,
7416 bool is_privileged)
fc01cea9 7417{
d5f8d3fe 7418 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7419 struct rpc_message msg = {
7420 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7421 .rpc_cred = cred,
7422 };
71ac6da9
TM		 7423 struct rpc_task_setup task_setup_data = {
7424 .rpc_client = clp->cl_rpcclient,
7425 .rpc_message = &msg,
8fe72bac 7426 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7427 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7428 };
fc01cea9 7429
7135840f 7430 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7431 return ERR_PTR(-EIO);
dfb4f309 7432 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7433 if (calldata == NULL) {
7135840f 7434 nfs_put_client(clp);
71ac6da9 7435 return ERR_PTR(-ENOMEM);
fc01cea9 7436 }
a9c92d6b 7437 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7438 if (is_privileged)
7439 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7440 msg.rpc_argp = &calldata->args;
7441 msg.rpc_resp = &calldata->res;
7442 calldata->clp = clp;
71ac6da9 7443 task_setup_data.callback_data = calldata;
fc01cea9 7444
71ac6da9
TM		 7445 return rpc_run_task(&task_setup_data);
7446}
7447
2f60ea6b 7448static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7449{
7450 struct rpc_task *task;
7451 int ret = 0;
7452
2f60ea6b 7453 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7454 return -EAGAIN;
8fe72bac 7455 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7456 if (IS_ERR(task))
7457 ret = PTR_ERR(task);
7458 else
bf294b41 7459 rpc_put_task_async(task);
71ac6da9
TM		 7460 dprintk("<-- %s status=%d\n", __func__, ret);
7461 return ret;
7462}
7463
7464static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7465{
7466 struct rpc_task *task;
7467 int ret;
7468
8fe72bac 7469 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7470 if (IS_ERR(task)) {
7471 ret = PTR_ERR(task);
7472 goto out;
7473 }
7474 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7475 if (!ret) {
7476 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7477
7478 if (task->tk_status == 0)
7479 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7480 ret = task->tk_status;
b4410c2f 7481 }
71ac6da9
TM		 7482 rpc_put_task(task);
7483out:
7484 dprintk("<-- %s status=%d\n", __func__, ret);
7485 return ret;
fc01cea9
AA		 7486}
7487
fce5c838
RL		 7488struct nfs4_reclaim_complete_data {
7489 struct nfs_client *clp;
7490 struct nfs41_reclaim_complete_args arg;
7491 struct nfs41_reclaim_complete_res res;
7492};
7493
7494static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7495{
7496 struct nfs4_reclaim_complete_data *calldata = data;
7497
d9afbd1b
TM		 7498 nfs41_setup_sequence(calldata->clp->cl_session,
7499 &calldata->arg.seq_args,
7500 &calldata->res.seq_res,
7501 task);
fce5c838
RL		 7502}
7503
aa5190d0
TM		 7504static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7505{
7506 switch(task->tk_status) {
7507 case 0:
7508 case -NFS4ERR_COMPLETE_ALREADY:
7509 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7510 break;
7511 case -NFS4ERR_DELAY:
aa5190d0 7512 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7513 /* fall through */
7514 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7515 return -EAGAIN;
7516 default:
0400a6b0 7517 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7518 }
7519 return 0;
7520}
7521
fce5c838
RL		 7522static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7523{
7524 struct nfs4_reclaim_complete_data *calldata = data;
7525 struct nfs_client *clp = calldata->clp;
7526 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7527
7528 dprintk("--> %s\n", __func__);
14516c3a
TM		 7529 if (!nfs41_sequence_done(task, res))
7530 return;
fce5c838 7531
c6d01c6f 7532 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7533 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7534 rpc_restart_call_prepare(task);
7535 return;
7536 }
fce5c838
RL		 7537 dprintk("<-- %s\n", __func__);
7538}
7539
7540static void nfs4_free_reclaim_complete_data(void *data)
7541{
7542 struct nfs4_reclaim_complete_data *calldata = data;
7543
7544 kfree(calldata);
7545}
7546
7547static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7548 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7549 .rpc_call_done = nfs4_reclaim_complete_done,
7550 .rpc_release = nfs4_free_reclaim_complete_data,
7551};
7552
7553/*
7554 * Issue a global reclaim complete.
7555 */
965e9c23
TM		 7556static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7557 struct rpc_cred *cred)
fce5c838
RL		 7558{
7559 struct nfs4_reclaim_complete_data *calldata;
7560 struct rpc_task *task;
7561 struct rpc_message msg = {
7562 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7563 .rpc_cred = cred,
fce5c838
RL		 7564 };
7565 struct rpc_task_setup task_setup_data = {
7566 .rpc_client = clp->cl_rpcclient,
7567 .rpc_message = &msg,
7568 .callback_ops = &nfs4_reclaim_complete_call_ops,
7569 .flags = RPC_TASK_ASYNC,
7570 };
7571 int status = -ENOMEM;
7572
7573 dprintk("--> %s\n", __func__);
8535b2be 7574 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7575 if (calldata == NULL)
7576 goto out;
7577 calldata->clp = clp;
7578 calldata->arg.one_fs = 0;
fce5c838 7579
a9c92d6b 7580 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7581 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7582 msg.rpc_argp = &calldata->arg;
7583 msg.rpc_resp = &calldata->res;
7584 task_setup_data.callback_data = calldata;
7585 task = rpc_run_task(&task_setup_data);
acf82b85 7586 if (IS_ERR(task)) {
fce5c838 7587 status = PTR_ERR(task);
acf82b85
DC		 7588 goto out;
7589 }
c34c32ea
AA		 7590 status = nfs4_wait_for_completion_rpc_task(task);
7591 if (status == 0)
7592 status = task->tk_status;
fce5c838 7593 rpc_put_task(task);
acf82b85 7594 return 0;
fce5c838
RL		 7595out:
7596 dprintk("<-- %s status=%d\n", __func__, status);
7597 return status;
7598}
b1f69b75
AA		 7599
7600static void
7601nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7602{
7603 struct nfs4_layoutget *lgp = calldata;
c31663d4 7604 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7605 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7606
7607 dprintk("--> %s\n", __func__);
c31663d4
FI		 7608 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7609 * right now covering the LAYOUTGET we are about to send.
7610 * However, that is not so catastrophic, and there seems
7611 * to be no way to prevent it completely.
7612 */
6ba7db34 7613 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7614 &lgp->res.seq_res, task))
b1f69b75 7615 return;
cf7d63f1
FI		 7616 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7617 NFS_I(lgp->args.inode)->layout,
ce6ab4f2 7618 &lgp->args.range,
cf7d63f1
FI		 7619 lgp->args.ctx->state)) {
7620 rpc_exit(task, NFS4_OK);
cf7d63f1 7621 }
b1f69b75
AA		 7622}
7623
7624static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7625{
7626 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7627 struct inode *inode = lgp->args.inode;
7628 struct nfs_server *server = NFS_SERVER(inode);
7629 struct pnfs_layout_hdr *lo;
7630 struct nfs4_state *state = NULL;
ed7e5423 7631 unsigned long timeo, now, giveup;
b1f69b75 7632
ed7e5423 7633 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7634
6ba7db34 7635 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7636 goto out;
b1f69b75
AA		 7637
7638 switch (task->tk_status) {
7639 case 0:
ee314c2a 7640 goto out;
ed7e5423
BH		 7641 /*
7642 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7643 * (or clients) writing to the same RAID stripe
7644 */
b1f69b75 7645 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7646 /*
7647 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7648 * existing layout before getting a new one).
7649 */
b1f69b75 7650 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7651 timeo = rpc_get_timeout(task->tk_client);
7652 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7653 now = jiffies;
7654 if (time_after(giveup, now)) {
7655 unsigned long delay;
7656
7657 /* Delay for:
7658 * - Not less then NFS4_POLL_RETRY_MIN.
7659 * - One last time a jiffie before we give up
7660 * - exponential backoff (time_now minus start_attempt)
7661 */
7662 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7663 min((giveup - now - 1),
7664 now - lgp->args.timestamp));
7665
7666 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7667 __func__, delay);
7668 rpc_delay(task, delay);
7669 task->tk_status = 0;
7670 rpc_restart_call_prepare(task);
7671 goto out; /* Do not call nfs4_async_handle_error() */
7672 }
ee314c2a
TM		 7673 break;
7674 case -NFS4ERR_EXPIRED:
7675 case -NFS4ERR_BAD_STATEID:
7676 spin_lock(&inode->i_lock);
7677 lo = NFS_I(inode)->layout;
7678 if (!lo || list_empty(&lo->plh_segs)) {
7679 spin_unlock(&inode->i_lock);
7680 /* If the open stateid was bad, then recover it. */
7681 state = lgp->args.ctx->state;
7682 } else {
7683 LIST_HEAD(head);
7684
defb8460
CH		 7685 /*
7686 * Mark the bad layout state as invalid, then retry
7687 * with the current stateid.
7688 */
ee314c2a
TM		 7689 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7690 spin_unlock(&inode->i_lock);
ee314c2a 7691 pnfs_free_lseg_list(&head);
defb8460
CH		 7692
7693 task->tk_status = 0;
7694 rpc_restart_call_prepare(task);
b1f69b75
AA		 7695 }
7696 }
8478eaa1 7697 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
ee314c2a
TM		 7698 rpc_restart_call_prepare(task);
7699out:
b1f69b75
AA		 7700 dprintk("<-- %s\n", __func__);
7701}
7702
8554116e
IK		 7703static size_t max_response_pages(struct nfs_server *server)
7704{
7705 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7706 return nfs_page_array_len(0, max_resp_sz);
7707}
7708
7709static void nfs4_free_pages(struct page **pages, size_t size)
7710{
7711 int i;
7712
7713 if (!pages)
7714 return;
7715
7716 for (i = 0; i < size; i++) {
7717 if (!pages[i])
7718 break;
7719 __free_page(pages[i]);
7720 }
7721 kfree(pages);
7722}
7723
7724static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7725{
7726 struct page **pages;
7727 int i;
7728
7729 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7730 if (!pages) {
7731 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7732 return NULL;
7733 }
7734
7735 for (i = 0; i < size; i++) {
7736 pages[i] = alloc_page(gfp_flags);
7737 if (!pages[i]) {
7738 dprintk("%s: failed to allocate page\n", __func__);
7739 nfs4_free_pages(pages, size);
7740 return NULL;
7741 }
7742 }
7743
7744 return pages;
7745}
7746
b1f69b75
AA		 7747static void nfs4_layoutget_release(void *calldata)
7748{
7749 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7750 struct inode *inode = lgp->args.inode;
7751 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7752 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7753
7754 dprintk("--> %s\n", __func__);
8554116e 7755 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7756 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7757 put_nfs_open_context(lgp->args.ctx);
7758 kfree(calldata);
7759 dprintk("<-- %s\n", __func__);
7760}
7761
7762static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7763 .rpc_call_prepare = nfs4_layoutget_prepare,
7764 .rpc_call_done = nfs4_layoutget_done,
7765 .rpc_release = nfs4_layoutget_release,
7766};
7767
a0b0a6e3
TM		 7768struct pnfs_layout_segment *
7769nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7770{
a47970ff
WAA		 7771 struct inode *inode = lgp->args.inode;
7772 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7773 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7774 struct rpc_task *task;
7775 struct rpc_message msg = {
7776 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7777 .rpc_argp = &lgp->args,
7778 .rpc_resp = &lgp->res,
6ab59344 7779 .rpc_cred = lgp->cred,
b1f69b75
AA		 7780 };
7781 struct rpc_task_setup task_setup_data = {
7782 .rpc_client = server->client,
7783 .rpc_message = &msg,
7784 .callback_ops = &nfs4_layoutget_call_ops,
7785 .callback_data = lgp,
7786 .flags = RPC_TASK_ASYNC,
7787 };
a0b0a6e3 7788 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7789 int status = 0;
7790
7791 dprintk("--> %s\n", __func__);
7792
4bd5a980
PT		 7793 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7794 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7795
8554116e
IK		 7796 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7797 if (!lgp->args.layout.pages) {
7798 nfs4_layoutget_release(lgp);
a0b0a6e3 7799 return ERR_PTR(-ENOMEM);
8554116e
IK		 7800 }
7801 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7802 lgp->args.timestamp = jiffies;
8554116e 7803
35124a09 7804 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7805 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7806 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 7807
b1f69b75
AA		 7808 task = rpc_run_task(&task_setup_data);
7809 if (IS_ERR(task))
a0b0a6e3 7810 return ERR_CAST(task);
b1f69b75 7811 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7812 if (status == 0)
7813 status = task->tk_status;
1037e6ea
TM		 7814 trace_nfs4_layoutget(lgp->args.ctx,
7815 &lgp->args.range,
7816 &lgp->res.range,
7817 status);
085b7a45
WAA		 7818 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7819 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7820 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7821 rpc_put_task(task);
7822 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7823 if (status)
7824 return ERR_PTR(status);
7825 return lseg;
b1f69b75
AA		 7826}
7827
cbe82603
BH		 7828static void
7829nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7830{
7831 struct nfs4_layoutreturn *lrp = calldata;
7832
7833 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7834 nfs41_setup_sequence(lrp->clp->cl_session,
7835 &lrp->args.seq_args,
7836 &lrp->res.seq_res,
7837 task);
cbe82603
BH		 7838}
7839
7840static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7841{
7842 struct nfs4_layoutreturn *lrp = calldata;
7843 struct nfs_server *server;
7844
7845 dprintk("--> %s\n", __func__);
7846
6ba7db34 7847 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7848 return;
7849
7850 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7851 switch (task->tk_status) {
7852 default:
7853 task->tk_status = 0;
7854 case 0:
7855 break;
7856 case -NFS4ERR_DELAY:
8478eaa1 7857 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 7858 break;
d00c5d43 7859 rpc_restart_call_prepare(task);
cbe82603
BH		 7860 return;
7861 }
cbe82603
BH		 7862 dprintk("<-- %s\n", __func__);
7863}
7864
7865static void nfs4_layoutreturn_release(void *calldata)
7866{
7867 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7868 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7869
7870 dprintk("--> %s\n", __func__);
849b286f
TM		 7871 spin_lock(&lo->plh_inode->i_lock);
7872 if (lrp->res.lrs_present)
7873 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
d67ae825 7874 pnfs_clear_layoutreturn_waitbit(lo);
193e3aa2
PT		 7875 clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, &lo->plh_flags);
7876 rpc_wake_up(&NFS_SERVER(lo->plh_inode)->roc_rpcwaitq);
849b286f
TM		 7877 lo->plh_block_lgets--;
7878 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7879 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 7880 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 7881 kfree(calldata);
7882 dprintk("<-- %s\n", __func__);
7883}
7884
7885static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7886 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7887 .rpc_call_done = nfs4_layoutreturn_done,
7888 .rpc_release = nfs4_layoutreturn_release,
7889};
7890
6c16605d 7891int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 7892{
7893 struct rpc_task *task;
7894 struct rpc_message msg = {
7895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7896 .rpc_argp = &lrp->args,
7897 .rpc_resp = &lrp->res,
9556000d 7898 .rpc_cred = lrp->cred,
cbe82603
BH		 7899 };
7900 struct rpc_task_setup task_setup_data = {
1771c577 7901 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7902 .rpc_message = &msg,
7903 .callback_ops = &nfs4_layoutreturn_call_ops,
7904 .callback_data = lrp,
7905 };
6c16605d 7906 int status = 0;
cbe82603
BH		 7907
7908 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 7909 if (!sync) {
7910 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
7911 if (!lrp->inode) {
7912 nfs4_layoutreturn_release(lrp);
7913 return -EAGAIN;
7914 }
7915 task_setup_data.flags |= RPC_TASK_ASYNC;
7916 }
a9c92d6b 7917 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7918 task = rpc_run_task(&task_setup_data);
7919 if (IS_ERR(task))
7920 return PTR_ERR(task);
5a0ec8ac
TM		 7921 if (sync)
7922 status = task->tk_status;
1037e6ea 7923 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7924 dprintk("<-- %s status=%d\n", __func__, status);
7925 rpc_put_task(task);
7926 return status;
7927}
7928
b1f69b75 7929static int
cd5875fe
TM		 7930_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7931 struct pnfs_device *pdev,
7932 struct rpc_cred *cred)
b1f69b75
AA		 7933{
7934 struct nfs4_getdeviceinfo_args args = {
7935 .pdev = pdev,
7936 };
7937 struct nfs4_getdeviceinfo_res res = {
7938 .pdev = pdev,
7939 };
7940 struct rpc_message msg = {
7941 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7942 .rpc_argp = &args,
7943 .rpc_resp = &res,
cd5875fe 7944 .rpc_cred = cred,
b1f69b75
AA		 7945 };
7946 int status;
7947
7948 dprintk("--> %s\n", __func__);
7c513058 7949 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7950 dprintk("<-- %s status=%d\n", __func__, status);
7951
7952 return status;
7953}
7954
cd5875fe
TM		 7955int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7956 struct pnfs_device *pdev,
7957 struct rpc_cred *cred)
b1f69b75
AA		 7958{
7959 struct nfs4_exception exception = { };
7960 int err;
7961
7962 do {
7963 err = nfs4_handle_exception(server,
cd5875fe 7964 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7965 &exception);
7966 } while (exception.retry);
7967 return err;
7968}
7969EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7970
863a3c6c
AA		 7971static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7972{
7973 struct nfs4_layoutcommit_data *data = calldata;
7974 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7975 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7976
d9afbd1b
TM		 7977 nfs41_setup_sequence(session,
7978 &data->args.seq_args,
7979 &data->res.seq_res,
7980 task);
863a3c6c
AA		 7981}
7982
7983static void
7984nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7985{
7986 struct nfs4_layoutcommit_data *data = calldata;
7987 struct nfs_server *server = NFS_SERVER(data->args.inode);
7988
6ba7db34 7989 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7990 return;
7991
7992 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7993 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7994 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7995 case -NFS4ERR_BADLAYOUT: /* no layout */
7996 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7997 task->tk_status = 0;
e59d27e0 7998 case 0:
e59d27e0
TM		 7999 break;
8000 default:
8478eaa1 8001 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8002 rpc_restart_call_prepare(task);
8003 return;
8004 }
8005 }
863a3c6c
AA		 8006}
8007
8008static void nfs4_layoutcommit_release(void *calldata)
8009{
8010 struct nfs4_layoutcommit_data *data = calldata;
8011
db29c089 8012 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8013 nfs_post_op_update_inode_force_wcc(data->args.inode,
8014 data->res.fattr);
863a3c6c 8015 put_rpccred(data->cred);
472e2594 8016 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8017 kfree(data);
8018}
8019
8020static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8021 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8022 .rpc_call_done = nfs4_layoutcommit_done,
8023 .rpc_release = nfs4_layoutcommit_release,
8024};
8025
8026int
ef311537 8027nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8028{
8029 struct rpc_message msg = {
8030 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8031 .rpc_argp = &data->args,
8032 .rpc_resp = &data->res,
8033 .rpc_cred = data->cred,
8034 };
8035 struct rpc_task_setup task_setup_data = {
8036 .task = &data->task,
8037 .rpc_client = NFS_CLIENT(data->args.inode),
8038 .rpc_message = &msg,
8039 .callback_ops = &nfs4_layoutcommit_ops,
8040 .callback_data = data,
863a3c6c
AA		 8041 };
8042 struct rpc_task *task;
8043 int status = 0;
8044
8045 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
8046 "lbw: %llu inode %lu\n",
8047 data->task.tk_pid, sync,
8048 data->args.lastbytewritten,
8049 data->args.inode->i_ino);
8050
472e2594
TM		 8051 if (!sync) {
8052 data->inode = nfs_igrab_and_active(data->args.inode);
8053 if (data->inode == NULL) {
8054 nfs4_layoutcommit_release(data);
8055 return -EAGAIN;
8056 }
8057 task_setup_data.flags = RPC_TASK_ASYNC;
8058 }
a9c92d6b 8059 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8060 task = rpc_run_task(&task_setup_data);
8061 if (IS_ERR(task))
8062 return PTR_ERR(task);
472e2594
TM		 8063 if (sync)
8064 status = task->tk_status;
1037e6ea 8065 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 8066 dprintk("%s: status %d\n", __func__, status);
8067 rpc_put_task(task);
8068 return status;
8069}
fca78d6d 8070
97431204
AA		 8071/**
8072 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8073 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8074 */
fca78d6d
BS		 8075static int
8076_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8077 struct nfs_fsinfo *info,
8078 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8079{
8080 struct nfs41_secinfo_no_name_args args = {
8081 .style = SECINFO_STYLE_CURRENT_FH,
8082 };
8083 struct nfs4_secinfo_res res = {
8084 .flavors = flavors,
8085 };
8086 struct rpc_message msg = {
8087 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8088 .rpc_argp = &args,
8089 .rpc_resp = &res,
8090 };
b1b3e136 8091 struct rpc_clnt *clnt = server->client;
7cb852df 8092 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8093 int status;
8094
8095 if (use_integrity) {
8096 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8097 cred = nfs4_get_clid_cred(server->nfs_client);
8098 msg.rpc_cred = cred;
b1b3e136
WAA		 8099 }
8100
8101 dprintk("--> %s\n", __func__);
8102 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8103 &res.seq_res, 0);
8104 dprintk("<-- %s status=%d\n", __func__, status);
8105
7cb852df
WAA		 8106 if (cred)
8107 put_rpccred(cred);
b1b3e136
WAA		 8108
8109 return status;
fca78d6d
BS		 8110}
8111
8112static int
8113nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8114 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8115{
8116 struct nfs4_exception exception = { };
8117 int err;
8118 do {
b1b3e136
WAA		 8119 /* first try using integrity protection */
8120 err = -NFS4ERR_WRONGSEC;
8121
8122 /* try to use integrity protection with machine cred */
8123 if (_nfs4_is_integrity_protected(server->nfs_client))
8124 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8125 flavors, true);
8126
8127 /*
8128 * if unable to use integrity protection, or SECINFO with
8129 * integrity protection returns NFS4ERR_WRONGSEC (which is
8130 * disallowed by spec, but exists in deployed servers) use
8131 * the current filesystem's rpc_client and the user cred.
8132 */
8133 if (err == -NFS4ERR_WRONGSEC)
8134 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8135 flavors, false);
8136
fca78d6d
BS		 8137 switch (err) {
8138 case 0:
8139 case -NFS4ERR_WRONGSEC:
78b19bae 8140 case -ENOTSUPP:
05e9cfb4 8141 goto out;
fca78d6d
BS		 8142 default:
8143 err = nfs4_handle_exception(server, err, &exception);
8144 }
8145 } while (exception.retry);
05e9cfb4 8146out:
fca78d6d
BS		 8147 return err;
8148}
8149
8150static int
8151nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8152 struct nfs_fsinfo *info)
8153{
8154 int err;
8155 struct page *page;
367156d9 8156 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8157 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8158 struct nfs4_secinfo4 *secinfo;
8159 int i;
fca78d6d
BS		 8160
8161 page = alloc_page(GFP_KERNEL);
8162 if (!page) {
8163 err = -ENOMEM;
8164 goto out;
8165 }
8166
8167 flavors = page_address(page);
8168 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8169
8170 /*
8171 * Fall back on "guess and check" method if
8172 * the server doesn't support SECINFO_NO_NAME
8173 */
78b19bae 8174 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8175 err = nfs4_find_root_sec(server, fhandle, info);
8176 goto out_freepage;
8177 }
8178 if (err)
8179 goto out_freepage;
8180
58a8cf12
WAA		 8181 for (i = 0; i < flavors->num_flavors; i++) {
8182 secinfo = &flavors->flavors[i];
8183
8184 switch (secinfo->flavor) {
8185 case RPC_AUTH_NULL:
8186 case RPC_AUTH_UNIX:
8187 case RPC_AUTH_GSS:
8188 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8189 &secinfo->flavor_info);
8190 break;
8191 default:
8192 flavor = RPC_AUTH_MAXFLAVOR;
8193 break;
8194 }
8195
4d4b69dd
WAA		 8196 if (!nfs_auth_info_match(&server->auth_info, flavor))
8197 flavor = RPC_AUTH_MAXFLAVOR;
8198
58a8cf12
WAA		 8199 if (flavor != RPC_AUTH_MAXFLAVOR) {
8200 err = nfs4_lookup_root_sec(server, fhandle,
8201 info, flavor);
8202 if (!err)
8203 break;
8204 }
8205 }
8206
8207 if (flavor == RPC_AUTH_MAXFLAVOR)
8208 err = -EPERM;
fca78d6d
BS		 8209
8210out_freepage:
8211 put_page(page);
8212 if (err == -EACCES)
8213 return -EPERM;
8214out:
8215 return err;
8216}
1cab0652 8217
ab7cb0df
TM		 8218static int _nfs41_test_stateid(struct nfs_server *server,
8219 nfs4_stateid *stateid,
8220 struct rpc_cred *cred)
7d974794
BS		 8221{
8222 int status;
8223 struct nfs41_test_stateid_args args = {
1cab0652 8224 .stateid = stateid,
7d974794
BS		 8225 };
8226 struct nfs41_test_stateid_res res;
8227 struct rpc_message msg = {
8228 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8229 .rpc_argp = &args,
8230 .rpc_resp = &res,
ab7cb0df 8231 .rpc_cred = cred,
7d974794 8232 };
3787d506
WAA		 8233 struct rpc_clnt *rpc_client = server->client;
8234
8235 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8236 &rpc_client, &msg);
1cab0652 8237
38527b15 8238 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8239 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8240 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8241 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8242 &args.seq_args, &res.seq_res);
38527b15
CL		 8243 if (status != NFS_OK) {
8244 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8245 return status;
38527b15
CL		 8246 }
8247 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8248 return -res.status;
7d974794
BS		 8249}
8250
38527b15
CL		 8251/**
8252 * nfs41_test_stateid - perform a TEST_STATEID operation
8253 *
8254 * @server: server / transport on which to perform the operation
8255 * @stateid: state ID to test
ab7cb0df 8256 * @cred: credential
38527b15
CL		 8257 *
8258 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8259 * Otherwise a negative NFS4ERR value is returned if the operation
8260 * failed or the state ID is not currently valid.
8261 */
ab7cb0df
TM		 8262static int nfs41_test_stateid(struct nfs_server *server,
8263 nfs4_stateid *stateid,
8264 struct rpc_cred *cred)
7d974794
BS		 8265{
8266 struct nfs4_exception exception = { };
8267 int err;
8268 do {
ab7cb0df 8269 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8270 if (err != -NFS4ERR_DELAY)
8271 break;
8272 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8273 } while (exception.retry);
8274 return err;
8275}
9aeda35f 8276
7c1d5fae
TM		 8277struct nfs_free_stateid_data {
8278 struct nfs_server *server;
8279 struct nfs41_free_stateid_args args;
9aeda35f 8280 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8281};
8282
8283static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8284{
8285 struct nfs_free_stateid_data *data = calldata;
8286 nfs41_setup_sequence(nfs4_get_session(data->server),
8287 &data->args.seq_args,
8288 &data->res.seq_res,
8289 task);
8290}
8291
8292static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8293{
8294 struct nfs_free_stateid_data *data = calldata;
8295
8296 nfs41_sequence_done(task, &data->res.seq_res);
8297
8298 switch (task->tk_status) {
8299 case -NFS4ERR_DELAY:
8478eaa1 8300 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8301 rpc_restart_call_prepare(task);
8302 }
8303}
8304
8305static void nfs41_free_stateid_release(void *calldata)
8306{
8307 kfree(calldata);
8308}
8309
17f26b12 8310static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8311 .rpc_call_prepare = nfs41_free_stateid_prepare,
8312 .rpc_call_done = nfs41_free_stateid_done,
8313 .rpc_release = nfs41_free_stateid_release,
8314};
8315
8316static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8317 nfs4_stateid *stateid,
ab7cb0df 8318 struct rpc_cred *cred,
7c1d5fae
TM		 8319 bool privileged)
8320{
9aeda35f
BS		 8321 struct rpc_message msg = {
8322 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8323 .rpc_cred = cred,
9aeda35f 8324 };
7c1d5fae
TM		 8325 struct rpc_task_setup task_setup = {
8326 .rpc_client = server->client,
8327 .rpc_message = &msg,
8328 .callback_ops = &nfs41_free_stateid_ops,
8329 .flags = RPC_TASK_ASYNC,
8330 };
8331 struct nfs_free_stateid_data *data;
9aeda35f 8332
3787d506
WAA		 8333 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8334 &task_setup.rpc_client, &msg);
8335
38527b15 8336 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8337 data = kmalloc(sizeof(*data), GFP_NOFS);
8338 if (!data)
8339 return ERR_PTR(-ENOMEM);
8340 data->server = server;
8341 nfs4_stateid_copy(&data->args.stateid, stateid);
8342
8343 task_setup.callback_data = data;
8344
8345 msg.rpc_argp = &data->args;
8346 msg.rpc_resp = &data->res;
a9c92d6b 8347 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8348 if (privileged)
8349 nfs4_set_sequence_privileged(&data->args.seq_args);
8350
8351 return rpc_run_task(&task_setup);
9aeda35f
BS		 8352}
8353
38527b15
CL		 8354/**
8355 * nfs41_free_stateid - perform a FREE_STATEID operation
8356 *
8357 * @server: server / transport on which to perform the operation
8358 * @stateid: state ID to release
ab7cb0df 8359 * @cred: credential
38527b15
CL		 8360 *
8361 * Returns NFS_OK if the server freed "stateid". Otherwise a
8362 * negative NFS4ERR value is returned.
8363 */
ab7cb0df
TM		 8364static int nfs41_free_stateid(struct nfs_server *server,
8365 nfs4_stateid *stateid,
8366 struct rpc_cred *cred)
9aeda35f 8367{
7c1d5fae
TM		 8368 struct rpc_task *task;
8369 int ret;
8370
ab7cb0df 8371 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8372 if (IS_ERR(task))
8373 return PTR_ERR(task);
8374 ret = rpc_wait_for_completion_task(task);
8375 if (!ret)
8376 ret = task->tk_status;
8377 rpc_put_task(task);
8378 return ret;
9aeda35f 8379}
36281caa 8380
f1cdae87
JL		 8381static void
8382nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8383{
8384 struct rpc_task *task;
ab7cb0df 8385 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8386
ab7cb0df 8387 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8388 nfs4_free_lock_state(server, lsp);
8389 if (IS_ERR(task))
f1cdae87 8390 return;
c8b2d0bf 8391 rpc_put_task(task);
c8b2d0bf
TM		 8392}
8393
36281caa
TM		 8394static bool nfs41_match_stateid(const nfs4_stateid *s1,
8395 const nfs4_stateid *s2)
8396{
2d2f24ad 8397 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8398 return false;
8399
2d2f24ad 8400 if (s1->seqid == s2->seqid)
36281caa 8401 return true;
2d2f24ad 8402 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8403 return true;
8404
8405 return false;
8406}
8407
557134a3
AA		 8408#endif /* CONFIG_NFS_V4_1 */
8409
36281caa
TM		 8410static bool nfs4_match_stateid(const nfs4_stateid *s1,
8411 const nfs4_stateid *s2)
8412{
f597c537 8413 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8414}
8415
8416
17280175 8417static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8418 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8419 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8420 .recover_open = nfs4_open_reclaim,
8421 .recover_lock = nfs4_lock_reclaim,
591d71cb 8422 .establish_clid = nfs4_init_clientid,
05f4c350 8423 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8424};
8425
591d71cb 8426#if defined(CONFIG_NFS_V4_1)
17280175 8427static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8428 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8429 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8430 .recover_open = nfs4_open_reclaim,
8431 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8432 .establish_clid = nfs41_init_clientid,
fce5c838 8433 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8434 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8435};
8436#endif /* CONFIG_NFS_V4_1 */
8437
17280175 8438static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8439 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8440 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8441 .recover_open = nfs40_open_expired,
591d71cb
AA		 8442 .recover_lock = nfs4_lock_expired,
8443 .establish_clid = nfs4_init_clientid,
8444};
8445
8446#if defined(CONFIG_NFS_V4_1)
17280175 8447static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8448 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8449 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8450 .recover_open = nfs41_open_expired,
8451 .recover_lock = nfs41_lock_expired,
4d643d1d 8452 .establish_clid = nfs41_init_clientid,
1da177e4 8453};
591d71cb 8454#endif /* CONFIG_NFS_V4_1 */
1da177e4 8455
17280175 8456static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8457 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8458 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8459 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8460};
8461
8462#if defined(CONFIG_NFS_V4_1)
17280175 8463static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8464 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8465 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8466 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8467};
8468#endif
8469
ec011fe8 8470static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8471 .get_locations = _nfs40_proc_get_locations,
44c99933 8472 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8473};
8474
8475#if defined(CONFIG_NFS_V4_1)
8476static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8477 .get_locations = _nfs41_proc_get_locations,
44c99933 8478 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8479};
8480#endif /* CONFIG_NFS_V4_1 */
8481
97dc1359
TM		 8482static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8483 .minor_version = 0,
39c6daae
TM		 8484 .init_caps = NFS_CAP_READDIRPLUS
8485 | NFS_CAP_ATOMIC_OPEN
8486 | NFS_CAP_CHANGE_ATTR
8487 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8488 .init_client = nfs40_init_client,
8489 .shutdown_client = nfs40_shutdown_client,
36281caa 8490 .match_stateid = nfs4_match_stateid,
fca78d6d 8491 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8492 .free_lock_state = nfs4_release_lockowner,
63f5f796 8493 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8494 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8495 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8496 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8497 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8498 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8499};
8500
8501#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8502static struct nfs_seqid *
8503nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8504{
8505 return NULL;
8506}
8507
97dc1359
TM		 8508static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8509 .minor_version = 1,
39c6daae
TM		 8510 .init_caps = NFS_CAP_READDIRPLUS
8511 | NFS_CAP_ATOMIC_OPEN
8512 | NFS_CAP_CHANGE_ATTR
3b66486c 8513 | NFS_CAP_POSIX_LOCK
49f9a0fa 8514 | NFS_CAP_STATEID_NFSV41
e983120e 8515 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8516 .init_client = nfs41_init_client,
8517 .shutdown_client = nfs41_shutdown_client,
36281caa 8518 .match_stateid = nfs41_match_stateid,
fca78d6d 8519 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8520 .free_lock_state = nfs41_free_lock_state,
63f5f796 8521 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8522 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8523 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8524 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8525 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8526 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8527};
8528#endif
8529
42c2c424
SD		 8530#if defined(CONFIG_NFS_V4_2)
8531static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8532 .minor_version = 2,
7017310a
BS		 8533 .init_caps = NFS_CAP_READDIRPLUS
8534 | NFS_CAP_ATOMIC_OPEN
8535 | NFS_CAP_CHANGE_ATTR
8536 | NFS_CAP_POSIX_LOCK
8537 | NFS_CAP_STATEID_NFSV41
e983120e 8538 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8539 | NFS_CAP_ALLOCATE
624bd5b7 8540 | NFS_CAP_DEALLOCATE
e983120e 8541 | NFS_CAP_SEEK,
abf79bb3
CL		 8542 .init_client = nfs41_init_client,
8543 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8544 .match_stateid = nfs41_match_stateid,
8545 .find_root_sec = nfs41_find_root_sec,
7017310a 8546 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8547 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8548 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8549 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8550 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8551 .state_renewal_ops = &nfs41_state_renewal_ops,
8552};
8553#endif
8554
97dc1359
TM		 8555const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8556 [0] = &nfs_v4_0_minor_ops,
8557#if defined(CONFIG_NFS_V4_1)
8558 [1] = &nfs_v4_1_minor_ops,
8559#endif
42c2c424
SD		 8560#if defined(CONFIG_NFS_V4_2)
8561 [2] = &nfs_v4_2_minor_ops,
8562#endif
97dc1359
TM		 8563};
8564
17f26b12 8565static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8566 .create = nfs_create,
8567 .lookup = nfs_lookup,
8568 .atomic_open = nfs_atomic_open,
8569 .link = nfs_link,
8570 .unlink = nfs_unlink,
8571 .symlink = nfs_symlink,
8572 .mkdir = nfs_mkdir,
8573 .rmdir = nfs_rmdir,
8574 .mknod = nfs_mknod,
8575 .rename = nfs_rename,
8576 .permission = nfs_permission,
8577 .getattr = nfs_getattr,
8578 .setattr = nfs_setattr,
8579 .getxattr = generic_getxattr,
8580 .setxattr = generic_setxattr,
8581 .listxattr = generic_listxattr,
8582 .removexattr = generic_removexattr,
8583};
8584
92e1d5be 8585static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8586 .permission = nfs_permission,
8587 .getattr = nfs_getattr,
8588 .setattr = nfs_setattr,
64c2ce8b
AK		 8589 .getxattr = generic_getxattr,
8590 .setxattr = generic_setxattr,
8591 .listxattr = generic_listxattr,
8592 .removexattr = generic_removexattr,
6b3b5496
BF		 8593};
8594
509de811 8595const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8596 .version = 4, /* protocol version */
8597 .dentry_ops = &nfs4_dentry_operations,
8598 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8599 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8600 .file_ops = &nfs4_file_operations,
1da177e4 8601 .getroot = nfs4_proc_get_root,
281cad46 8602 .submount = nfs4_submount,
ff9099f2 8603 .try_mount = nfs4_try_mount,
1da177e4
LT		 8604 .getattr = nfs4_proc_getattr,
8605 .setattr = nfs4_proc_setattr,
8606 .lookup = nfs4_proc_lookup,
8607 .access = nfs4_proc_access,
8608 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8609 .create = nfs4_proc_create,
8610 .remove = nfs4_proc_remove,
8611 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8612 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8613 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8614 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8615 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8616 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8617 .link = nfs4_proc_link,
8618 .symlink = nfs4_proc_symlink,
8619 .mkdir = nfs4_proc_mkdir,
8620 .rmdir = nfs4_proc_remove,
8621 .readdir = nfs4_proc_readdir,
8622 .mknod = nfs4_proc_mknod,
8623 .statfs = nfs4_proc_statfs,
8624 .fsinfo = nfs4_proc_fsinfo,
8625 .pathconf = nfs4_proc_pathconf,
e9326dca 8626 .set_capabilities = nfs4_server_capabilities,
1da177e4 8627 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8628 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8629 .read_setup = nfs4_proc_read_setup,
ec06c096 8630 .read_done = nfs4_read_done,
1da177e4 8631 .write_setup = nfs4_proc_write_setup,
788e7a89 8632 .write_done = nfs4_write_done,
1da177e4 8633 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8634 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8635 .commit_done = nfs4_commit_done,
1da177e4 8636 .lock = nfs4_proc_lock,
e50a1c2e 8637 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8638 .close_context = nfs4_close_context,
2b484297 8639 .open_context = nfs4_atomic_open,
011e2a7f 8640 .have_delegation = nfs4_have_delegation,
57ec14c5 8641 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8642 .alloc_client = nfs4_alloc_client,
45a52a02 8643 .init_client = nfs4_init_client,
cdb7eced 8644 .free_client = nfs4_free_client,
1179acc6
BS		 8645 .create_server = nfs4_create_server,
8646 .clone_server = nfs_clone_server,
1da177e4
LT		 8647};
8648
64c2ce8b
AK		 8649static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8650 .prefix = XATTR_NAME_NFSV4_ACL,
8651 .list = nfs4_xattr_list_nfs4_acl,
8652 .get = nfs4_xattr_get_nfs4_acl,
8653 .set = nfs4_xattr_set_nfs4_acl,
8654};
8655
8656const struct xattr_handler *nfs4_xattr_handlers[] = {
8657 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8658#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8659 &nfs4_xattr_nfs4_label_handler,
8660#endif
64c2ce8b
AK		 8661 NULL
8662};
8663
1da177e4
LT		 8664/*
8665 * Local variables:
8666 * c-basic-offset: 8
8667 * End:
8668 */
Linux 6.x block layer and io_uring tree(s)