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NFS: Add Anna Schumaker as co-maintainer for the NFS client
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4 68
c6d01c6f
TM		 69#include "nfs4trace.h"
70
1da177e4
LT		 71#define NFSDBG_FACILITY NFSDBG_PROC
72
2066fe89 73#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 74#define NFS4_POLL_RETRY_MAX (15*HZ)
75
cdd4e68b 76struct nfs4_opendata;
864472e9 77static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 78static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 79static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
8478eaa1 80static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *, long *);
81934ddb 81static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 82static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
83static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 84static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 86 struct nfs4_state *state, struct nfs4_label *ilabel,
87 struct nfs4_label *olabel);
f062eb6c 88#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 89static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
90 struct rpc_cred *);
91static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
92 struct rpc_cred *);
f062eb6c 93#endif
aa9c2669
DQ		 94
95#ifdef CONFIG_NFS_V4_SECURITY_LABEL
96static inline struct nfs4_label *
97nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
98 struct iattr *sattr, struct nfs4_label *label)
99{
100 int err;
101
102 if (label == NULL)
103 return NULL;
104
105 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
106 return NULL;
107
aa9c2669
DQ		 108 err = security_dentry_init_security(dentry, sattr->ia_mode,
109 &dentry->d_name, (void **)&label->label, &label->len);
110 if (err == 0)
111 return label;
112
113 return NULL;
114}
115static inline void
116nfs4_label_release_security(struct nfs4_label *label)
117{
118 if (label)
119 security_release_secctx(label->label, label->len);
120}
121static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
122{
123 if (label)
124 return server->attr_bitmask;
125
126 return server->attr_bitmask_nl;
127}
128#else
129static inline struct nfs4_label *
130nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
131 struct iattr *sattr, struct nfs4_label *l)
132{ return NULL; }
133static inline void
134nfs4_label_release_security(struct nfs4_label *label)
135{ return; }
136static inline u32 *
137nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
138{ return server->attr_bitmask; }
139#endif
140
1da177e4 141/* Prevent leaks of NFSv4 errors into userland */
46f72f57 142static int nfs4_map_errors(int err)
1da177e4 143{
52567b03
TM		 144 if (err >= -1000)
145 return err;
146 switch (err) {
147 case -NFS4ERR_RESOURCE:
30005121
WAA		 148 case -NFS4ERR_LAYOUTTRYLATER:
149 case -NFS4ERR_RECALLCONFLICT:
52567b03 150 return -EREMOTEIO;
7ebb9315 151 case -NFS4ERR_WRONGSEC:
8897538e 152 case -NFS4ERR_WRONG_CRED:
7ebb9315 153 return -EPERM;
3ddeb7c5
TM		 154 case -NFS4ERR_BADOWNER:
155 case -NFS4ERR_BADNAME:
156 return -EINVAL;
fb13bfa7
TM		 157 case -NFS4ERR_SHARE_DENIED:
158 return -EACCES;
f25efd85
SD		 159 case -NFS4ERR_MINOR_VERS_MISMATCH:
160 return -EPROTONOSUPPORT;
6e3cf241
TM		 161 case -NFS4ERR_FILE_OPEN:
162 return -EBUSY;
52567b03 163 default:
1da177e4 164 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 165 __func__, -err);
52567b03 166 break;
1da177e4 167 }
52567b03 168 return -EIO;
1da177e4
LT		 169}
170
171/*
172 * This is our standard bitmap for GETATTR requests.
173 */
1549210f 174const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 175 FATTR4_WORD0_TYPE
176 | FATTR4_WORD0_CHANGE
177 | FATTR4_WORD0_SIZE
178 | FATTR4_WORD0_FSID
179 | FATTR4_WORD0_FILEID,
180 FATTR4_WORD1_MODE
181 | FATTR4_WORD1_NUMLINKS
182 | FATTR4_WORD1_OWNER
183 | FATTR4_WORD1_OWNER_GROUP
184 | FATTR4_WORD1_RAWDEV
185 | FATTR4_WORD1_SPACE_USED
186 | FATTR4_WORD1_TIME_ACCESS
187 | FATTR4_WORD1_TIME_METADATA
aa9c2669
DQ		 188 | FATTR4_WORD1_TIME_MODIFY,
189#ifdef CONFIG_NFS_V4_SECURITY_LABEL
190 FATTR4_WORD2_SECURITY_LABEL
191#endif
1da177e4
LT		 192};
193
1549210f
TM		 194static const u32 nfs4_pnfs_open_bitmap[3] = {
195 FATTR4_WORD0_TYPE
196 | FATTR4_WORD0_CHANGE
197 | FATTR4_WORD0_SIZE
198 | FATTR4_WORD0_FSID
199 | FATTR4_WORD0_FILEID,
200 FATTR4_WORD1_MODE
201 | FATTR4_WORD1_NUMLINKS
202 | FATTR4_WORD1_OWNER
203 | FATTR4_WORD1_OWNER_GROUP
204 | FATTR4_WORD1_RAWDEV
205 | FATTR4_WORD1_SPACE_USED
206 | FATTR4_WORD1_TIME_ACCESS
207 | FATTR4_WORD1_TIME_METADATA
208 | FATTR4_WORD1_TIME_MODIFY,
209 FATTR4_WORD2_MDSTHRESHOLD
210};
211
e23008ec
AA		 212static const u32 nfs4_open_noattr_bitmap[3] = {
213 FATTR4_WORD0_TYPE
214 | FATTR4_WORD0_CHANGE
215 | FATTR4_WORD0_FILEID,
216};
217
a09df2ca 218const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 219 FATTR4_WORD0_FILES_AVAIL
220 | FATTR4_WORD0_FILES_FREE
221 | FATTR4_WORD0_FILES_TOTAL,
222 FATTR4_WORD1_SPACE_AVAIL
223 | FATTR4_WORD1_SPACE_FREE
224 | FATTR4_WORD1_SPACE_TOTAL
225};
226
a09df2ca 227const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 228 FATTR4_WORD0_MAXLINK
229 | FATTR4_WORD0_MAXNAME,
230 0
231};
232
dae100c2 233const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 234 | FATTR4_WORD0_MAXREAD
235 | FATTR4_WORD0_MAXWRITE
236 | FATTR4_WORD0_LEASE_TIME,
55b6e774 237 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 238 | FATTR4_WORD1_FS_LAYOUT_TYPES,
239 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 240};
241
a09df2ca 242const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 243 FATTR4_WORD0_TYPE
244 | FATTR4_WORD0_CHANGE
245 | FATTR4_WORD0_SIZE
246 | FATTR4_WORD0_FSID
247 | FATTR4_WORD0_FILEID
248 | FATTR4_WORD0_FS_LOCATIONS,
249 FATTR4_WORD1_MODE
250 | FATTR4_WORD1_NUMLINKS
251 | FATTR4_WORD1_OWNER
252 | FATTR4_WORD1_OWNER_GROUP
253 | FATTR4_WORD1_RAWDEV
254 | FATTR4_WORD1_SPACE_USED
255 | FATTR4_WORD1_TIME_ACCESS
256 | FATTR4_WORD1_TIME_METADATA
257 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 258 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 259};
260
bc4785cd 261static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 262 struct nfs4_readdir_arg *readdir)
263{
0dbb4c67 264 __be32 *start, *p;
1da177e4 265
1da177e4 266 if (cookie > 2) {
b7ef1956 267 readdir->cookie = cookie;
1da177e4
LT		 268 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
269 return;
270 }
271
272 readdir->cookie = 0;
273 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
274 if (cookie == 2)
275 return;
276
277 /*
278 * NFSv4 servers do not return entries for '.' and '..'
279 * Therefore, we fake these entries here. We let '.'
280 * have cookie 0 and '..' have cookie 1. Note that
281 * when talking to the server, we always send cookie 0
282 * instead of 1 or 2.
283 */
2b86ce2d 284 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 285
286 if (cookie == 0) {
287 *p++ = xdr_one; /* next */
288 *p++ = xdr_zero; /* cookie, first word */
289 *p++ = xdr_one; /* cookie, second word */
290 *p++ = xdr_one; /* entry len */
291 memcpy(p, ".\0\0\0", 4); /* entry */
292 p++;
293 *p++ = xdr_one; /* bitmap length */
294 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
295 *p++ = htonl(8); /* attribute buffer length */
4e769b93 296 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 297 }
298
299 *p++ = xdr_one; /* next */
300 *p++ = xdr_zero; /* cookie, first word */
301 *p++ = xdr_two; /* cookie, second word */
302 *p++ = xdr_two; /* entry len */
303 memcpy(p, "..\0\0", 4); /* entry */
304 p++;
305 *p++ = xdr_one; /* bitmap length */
306 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
307 *p++ = htonl(8); /* attribute buffer length */
4e769b93 308 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 309
310 readdir->pgbase = (char *)p - (char *)start;
311 readdir->count -= readdir->pgbase;
2b86ce2d 312 kunmap_atomic(start);
1da177e4
LT		 313}
314
8478eaa1
N		 315static long nfs4_update_delay(long *timeout)
316{
317 long ret;
318 if (!timeout)
319 return NFS4_POLL_RETRY_MAX;
320 if (*timeout <= 0)
321 *timeout = NFS4_POLL_RETRY_MIN;
322 if (*timeout > NFS4_POLL_RETRY_MAX)
323 *timeout = NFS4_POLL_RETRY_MAX;
324 ret = *timeout;
325 *timeout <<= 1;
326 return ret;
327}
328
65de872e
TM		 329static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
330{
331 int res = 0;
332
333 might_sleep();
334
8478eaa1
N		 335 freezable_schedule_timeout_killable_unsafe(
336 nfs4_update_delay(timeout));
65de872e
TM		 337 if (fatal_signal_pending(current))
338 res = -ERESTARTSYS;
65de872e
TM		 339 return res;
340}
341
342/* This is the error handling routine for processes that are allowed
343 * to sleep.
344 */
f4ac1674 345int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 346{
347 struct nfs_client *clp = server->nfs_client;
9e33bed5 348 struct nfs4_state *state = exception->state;
3114ea7a 349 struct inode *inode = exception->inode;
65de872e
TM		 350 int ret = errorcode;
351
352 exception->retry = 0;
353 switch(errorcode) {
354 case 0:
355 return 0;
3114ea7a 356 case -NFS4ERR_OPENMODE:
011e2a7f 357 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 358 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 359 exception->retry = 1;
360 return 0;
361 }
362 if (state == NULL)
363 break;
5d422301
TM		 364 ret = nfs4_schedule_stateid_recovery(server, state);
365 if (ret < 0)
366 break;
3114ea7a 367 goto wait_on_recovery;
a1d0b5ee 368 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 369 case -NFS4ERR_ADMIN_REVOKED:
370 case -NFS4ERR_BAD_STATEID:
9e33bed5
TM		 371 if (state == NULL)
372 break;
5d422301
TM		 373 ret = nfs4_schedule_stateid_recovery(server, state);
374 if (ret < 0)
375 break;
0400a6b0 376 goto wait_on_recovery;
0ced63d1 377 case -NFS4ERR_EXPIRED:
5d422301
TM		 378 if (state != NULL) {
379 ret = nfs4_schedule_stateid_recovery(server, state);
380 if (ret < 0)
381 break;
382 }
65de872e 383 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 384 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 385 nfs4_schedule_lease_recovery(clp);
386 goto wait_on_recovery;
519ae255
CL		 387 case -NFS4ERR_MOVED:
388 ret = nfs4_schedule_migration_recovery(server);
389 if (ret < 0)
390 break;
391 goto wait_on_recovery;
8ef2f8d4
CL		 392 case -NFS4ERR_LEASE_MOVED:
393 nfs4_schedule_lease_moved_recovery(clp);
394 goto wait_on_recovery;
03391693 395#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 396 case -NFS4ERR_BADSESSION:
397 case -NFS4ERR_BADSLOT:
398 case -NFS4ERR_BAD_HIGH_SLOT:
399 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
400 case -NFS4ERR_DEADSESSION:
401 case -NFS4ERR_SEQ_FALSE_RETRY:
402 case -NFS4ERR_SEQ_MISORDERED:
403 dprintk("%s ERROR: %d Reset session\n", __func__,
404 errorcode);
9f594791 405 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 406 goto wait_on_recovery;
03391693 407#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 408 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 409 if (exception->timeout > HZ) {
410 /* We have retried a decent amount, time to
411 * fail
412 */
413 ret = -EBUSY;
414 break;
415 }
65de872e
TM		 416 case -NFS4ERR_GRACE:
417 case -NFS4ERR_DELAY:
418 ret = nfs4_delay(server->client, &exception->timeout);
419 if (ret != 0)
420 break;
a8a4ae3a 421 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 422 case -NFS4ERR_OLD_STATEID:
423 exception->retry = 1;
b064eca2
TM		 424 break;
425 case -NFS4ERR_BADOWNER:
426 /* The following works around a Linux server bug! */
427 case -NFS4ERR_BADNAME:
428 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
429 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
430 exception->retry = 1;
431 printk(KERN_WARNING "NFS: v4 server %s "
432 "does not accept raw "
433 "uid/gids. "
434 "Reenabling the idmapper.\n",
435 server->nfs_client->cl_hostname);
436 }
65de872e
TM		 437 }
438 /* We failed to handle the error */
439 return nfs4_map_errors(ret);
0400a6b0 440wait_on_recovery:
a2c0b9e2 441 ret = nfs4_wait_clnt_recover(clp);
519ae255
CL		 442 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
443 return -EIO;
a2c0b9e2
TM		 444 if (ret == 0)
445 exception->retry = 1;
446 return ret;
65de872e
TM		 447}
448
a5250def
WAA		 449/*
450 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
451 * or 'false' otherwise.
452 */
453static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
454{
455 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
456
457 if (flavor == RPC_AUTH_GSS_KRB5I ||
458 flavor == RPC_AUTH_GSS_KRB5P)
459 return true;
460
461 return false;
462}
65de872e 463
452e9352 464static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 465{
1da177e4
LT		 466 spin_lock(&clp->cl_lock);
467 if (time_before(clp->cl_last_renewal,timestamp))
468 clp->cl_last_renewal = timestamp;
469 spin_unlock(&clp->cl_lock);
470}
471
452e9352
TM		 472static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
473{
474 do_renew_lease(server->nfs_client, timestamp);
475}
476
2a3eb2b9
CL		 477struct nfs4_call_sync_data {
478 const struct nfs_server *seq_server;
479 struct nfs4_sequence_args *seq_args;
480 struct nfs4_sequence_res *seq_res;
481};
482
a9c92d6b
CL		 483static void nfs4_init_sequence(struct nfs4_sequence_args *args,
484 struct nfs4_sequence_res *res, int cache_reply)
485{
486 args->sa_slot = NULL;
487 args->sa_cache_this = cache_reply;
488 args->sa_privileged = 0;
489
490 res->sr_slot = NULL;
491}
492
493static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
494{
495 args->sa_privileged = 1;
496}
497
cb04ad2a
PT		 498int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
499 struct nfs4_sequence_args *args,
500 struct nfs4_sequence_res *res,
501 struct rpc_task *task)
3bd2384a 502{
3bd2384a
CL		 503 struct nfs4_slot *slot;
504
505 /* slot already allocated? */
506 if (res->sr_slot != NULL)
507 goto out_start;
508
509 spin_lock(&tbl->slot_tbl_lock);
510 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
511 goto out_sleep;
512
513 slot = nfs4_alloc_slot(tbl);
514 if (IS_ERR(slot)) {
515 if (slot == ERR_PTR(-ENOMEM))
516 task->tk_timeout = HZ >> 2;
517 goto out_sleep;
518 }
519 spin_unlock(&tbl->slot_tbl_lock);
520
521 args->sa_slot = slot;
522 res->sr_slot = slot;
523
524out_start:
525 rpc_call_start(task);
526 return 0;
527
528out_sleep:
529 if (args->sa_privileged)
530 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
531 NULL, RPC_PRIORITY_PRIVILEGED);
532 else
533 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
534 spin_unlock(&tbl->slot_tbl_lock);
535 return -EAGAIN;
536}
cb04ad2a 537EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
3bd2384a
CL		 538
539static int nfs40_sequence_done(struct rpc_task *task,
540 struct nfs4_sequence_res *res)
541{
542 struct nfs4_slot *slot = res->sr_slot;
543 struct nfs4_slot_table *tbl;
544
cab92c19 545 if (slot == NULL)
3bd2384a
CL		 546 goto out;
547
548 tbl = slot->table;
549 spin_lock(&tbl->slot_tbl_lock);
550 if (!nfs41_wake_and_assign_slot(tbl, slot))
551 nfs4_free_slot(tbl, slot);
552 spin_unlock(&tbl->slot_tbl_lock);
553
554 res->sr_slot = NULL;
555out:
556 return 1;
557}
558
cccef3b9
AA		 559#if defined(CONFIG_NFS_V4_1)
560
d185a334 561static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 562{
e3725ec0 563 struct nfs4_session *session;
13615871 564 struct nfs4_slot_table *tbl;
a13ce7c6 565 struct nfs4_slot *slot = res->sr_slot;
c10e4498 566 bool send_new_highest_used_slotid = false;
13615871 567
a13ce7c6 568 tbl = slot->table;
e3725ec0 569 session = tbl->session;
ea028ac9 570
35dc1d74 571 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 572 /* Be nice to the server: try to ensure that the last transmitted
573 * value for highest_user_slotid <= target_highest_slotid
574 */
575 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
576 send_new_highest_used_slotid = true;
577
a13ce7c6 578 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 579 send_new_highest_used_slotid = false;
580 goto out_unlock;
581 }
a13ce7c6 582 nfs4_free_slot(tbl, slot);
c10e4498
TM		 583
584 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
585 send_new_highest_used_slotid = false;
b75ad4cd 586out_unlock:
35dc1d74 587 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 588 res->sr_slot = NULL;
c10e4498
TM		 589 if (send_new_highest_used_slotid)
590 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 591}
592
f9c96fcc 593int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 594{
e3725ec0 595 struct nfs4_session *session;
a13ce7c6 596 struct nfs4_slot *slot = res->sr_slot;
14516c3a 597 struct nfs_client *clp;
ac20d163 598 bool interrupted = false;
85563073 599 int ret = 1;
b0df806c 600
a13ce7c6
TM		 601 if (slot == NULL)
602 goto out_noaction;
468f8613
BS		 603 /* don't increment the sequence number if the task wasn't sent */
604 if (!RPC_WAS_SENT(task))
b0df806c
AA		 605 goto out;
606
e3725ec0 607 session = slot->table->session;
933602e3 608
ac20d163
TM		 609 if (slot->interrupted) {
610 slot->interrupted = 0;
611 interrupted = true;
612 }
613
2f92ae34 614 trace_nfs4_sequence_done(session, res);
691daf3b 615 /* Check the SEQUENCE operation status */
14516c3a
TM		 616 switch (res->sr_status) {
617 case 0:
b0df806c 618 /* Update the slot's sequence and clientid lease timer */
933602e3 619 ++slot->seq_nr;
e3725ec0 620 clp = session->clp;
8e63b6a8 621 do_renew_lease(clp, res->sr_timestamp);
0629e370 622 /* Check sequence flags */
b4410c2f
TM		 623 if (res->sr_status_flags != 0)
624 nfs4_schedule_lease_recovery(clp);
464ee9f9 625 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 626 break;
ac20d163
TM		 627 case 1:
628 /*
629 * sr_status remains 1 if an RPC level error occurred.
630 * The server may or may not have processed the sequence
631 * operation..
632 * Mark the slot as having hosted an interrupted RPC call.
633 */
634 slot->interrupted = 1;
635 goto out;
14516c3a
TM		 636 case -NFS4ERR_DELAY:
637 /* The server detected a resend of the RPC call and
638 * returned NFS4ERR_DELAY as per Section 2.10.6.2
639 * of RFC5661.
640 */
df2fabff 641 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 642 __func__,
df2fabff 643 slot->slot_nr,
933602e3 644 slot->seq_nr);
14516c3a 645 goto out_retry;
85563073
TM		 646 case -NFS4ERR_BADSLOT:
647 /*
648 * The slot id we used was probably retired. Try again
649 * using a different slot id.
650 */
e8794440
TM		 651 goto retry_nowait;
652 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 653 /*
654 * Was the last operation on this sequence interrupted?
655 * If so, retry after bumping the sequence number.
656 */
657 if (interrupted) {
658 ++slot->seq_nr;
659 goto retry_nowait;
660 }
e8794440
TM		 661 /*
662 * Could this slot have been previously retired?
663 * If so, then the server may be expecting seq_nr = 1!
664 */
8e63b6a8
TM		 665 if (slot->seq_nr != 1) {
666 slot->seq_nr = 1;
667 goto retry_nowait;
668 }
669 break;
e8794440
TM		 670 case -NFS4ERR_SEQ_FALSE_RETRY:
671 ++slot->seq_nr;
672 goto retry_nowait;
14516c3a
TM		 673 default:
674 /* Just update the slot sequence no. */
933602e3 675 ++slot->seq_nr;
b0df806c
AA		 676 }
677out:
678 /* The session may be reset by one of the error handlers. */
679 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 680 nfs41_sequence_free_slot(res);
a13ce7c6 681out_noaction:
85563073 682 return ret;
e8794440
TM		 683retry_nowait:
684 if (rpc_restart_call_prepare(task)) {
685 task->tk_status = 0;
686 ret = 0;
687 }
688 goto out;
14516c3a 689out_retry:
d05dd4e9 690 if (!rpc_restart_call(task))
14516c3a
TM		 691 goto out;
692 rpc_delay(task, NFS4_POLL_RETRY_MAX);
693 return 0;
b0df806c 694}
f9c96fcc 695EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 696
2c4b131d 697int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 698{
e3725ec0 699 if (res->sr_slot == NULL)
14516c3a 700 return 1;
3bd2384a
CL		 701 if (!res->sr_slot->table->session)
702 return nfs40_sequence_done(task, res);
14516c3a 703 return nfs41_sequence_done(task, res);
df896455 704}
2c4b131d 705EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 706
dc70d7b3 707int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 708 struct nfs4_sequence_args *args,
709 struct nfs4_sequence_res *res,
ce5039c1
AA		 710 struct rpc_task *task)
711{
fbcd4abc
AA		 712 struct nfs4_slot *slot;
713 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 714
715 dprintk("--> %s\n", __func__);
ce5039c1 716 /* slot already allocated? */
dfb4f309 717 if (res->sr_slot != NULL)
d9afbd1b 718 goto out_success;
ce5039c1 719
fbcd4abc
AA		 720 tbl = &session->fc_slot_table;
721
69d206b5
TM		 722 task->tk_timeout = 0;
723
fbcd4abc 724 spin_lock(&tbl->slot_tbl_lock);
774d5f14 725 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 726 !args->sa_privileged) {
0b1c8fc4 727 /* The state manager will wait until the slot table is empty */
0b1c8fc4 728 dprintk("%s session is draining\n", __func__);
7b939a3f 729 goto out_sleep;
689cf5c1
AB		 730 }
731
2dc03b7f 732 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 733 if (IS_ERR(slot)) {
734 /* If out of memory, try again in 1/4 second */
735 if (slot == ERR_PTR(-ENOMEM))
736 task->tk_timeout = HZ >> 2;
fbcd4abc 737 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 738 goto out_sleep;
fbcd4abc
AA		 739 }
740 spin_unlock(&tbl->slot_tbl_lock);
741
2b2fa717 742 args->sa_slot = slot;
fbcd4abc 743
e8d92382 744 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 745 slot->slot_nr, slot->seq_nr);
fbcd4abc 746
dfb4f309 747 res->sr_slot = slot;
8e63b6a8 748 res->sr_timestamp = jiffies;
2a6e26cd 749 res->sr_status_flags = 0;
fbcd4abc
AA		 750 /*
751 * sr_status is only set in decode_sequence, and so will remain
752 * set to 1 if an rpc level failure occurs.
753 */
754 res->sr_status = 1;
2f92ae34 755 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 756out_success:
757 rpc_call_start(task);
ce5039c1 758 return 0;
7b939a3f 759out_sleep:
8fe72bac
TM		 760 /* Privileged tasks are queued with top priority */
761 if (args->sa_privileged)
1e1093c7
TM		 762 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
763 NULL, RPC_PRIORITY_PRIVILEGED);
764 else
765 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 766 spin_unlock(&tbl->slot_tbl_lock);
767 return -EAGAIN;
ce5039c1 768}
dc70d7b3 769EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 770
5a580e0a
CL		 771static int nfs4_setup_sequence(const struct nfs_server *server,
772 struct nfs4_sequence_args *args,
773 struct nfs4_sequence_res *res,
774 struct rpc_task *task)
ce5039c1 775{
035168ab 776 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 777 int ret = 0;
778
3bd2384a 779 if (!session)
cb04ad2a
PT		 780 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
781 args, res, task);
035168ab 782
e8d92382 783 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 784 __func__, session->clp, session, res->sr_slot ?
e8d92382 785 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 786
9d12b216 787 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 788
ce5039c1
AA		 789 dprintk("<-- %s status=%d\n", __func__, ret);
790 return ret;
791}
792
ce5039c1
AA		 793static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
794{
2a3eb2b9 795 struct nfs4_call_sync_data *data = calldata;
6ba7db34 796 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 797
035168ab
TM		 798 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
799
d9afbd1b 800 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 801}
802
69ab40c4
AA		 803static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
804{
2a3eb2b9 805 struct nfs4_call_sync_data *data = calldata;
69ab40c4 806
14516c3a 807 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 808}
809
17280175 810static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 811 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 812 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 813};
814
3bd2384a
CL		 815#else /* !CONFIG_NFS_V4_1 */
816
9915ea7e
CL		 817static int nfs4_setup_sequence(const struct nfs_server *server,
818 struct nfs4_sequence_args *args,
819 struct nfs4_sequence_res *res,
820 struct rpc_task *task)
821{
cb04ad2a
PT		 822 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
823 args, res, task);
9915ea7e
CL		 824}
825
2c4b131d
PT		 826int nfs4_sequence_done(struct rpc_task *task,
827 struct nfs4_sequence_res *res)
9915ea7e 828{
3bd2384a 829 return nfs40_sequence_done(task, res);
9915ea7e 830}
2c4b131d 831EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 832
833#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 834
835static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
836{
837 struct nfs4_call_sync_data *data = calldata;
838 nfs4_setup_sequence(data->seq_server,
839 data->seq_args, data->seq_res, task);
840}
841
842static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
843{
844 struct nfs4_call_sync_data *data = calldata;
845 nfs4_sequence_done(task, data->seq_res);
846}
847
848static const struct rpc_call_ops nfs40_call_sync_ops = {
849 .rpc_call_prepare = nfs40_call_sync_prepare,
850 .rpc_call_done = nfs40_call_sync_done,
851};
852
7c513058
BS		 853static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
854 struct nfs_server *server,
ce5039c1
AA		 855 struct rpc_message *msg,
856 struct nfs4_sequence_args *args,
8fe72bac 857 struct nfs4_sequence_res *res)
ce5039c1
AA		 858{
859 int ret;
860 struct rpc_task *task;
9915ea7e 861 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 862 struct nfs4_call_sync_data data = {
035168ab 863 .seq_server = server,
ce5039c1
AA		 864 .seq_args = args,
865 .seq_res = res,
ce5039c1
AA		 866 };
867 struct rpc_task_setup task_setup = {
7c513058 868 .rpc_client = clnt,
ce5039c1 869 .rpc_message = msg,
9915ea7e 870 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 871 .callback_data = &data
872 };
873
ce5039c1
AA		 874 task = rpc_run_task(&task_setup);
875 if (IS_ERR(task))
876 ret = PTR_ERR(task);
877 else {
878 ret = task->tk_status;
879 rpc_put_task(task);
880 }
881 return ret;
882}
883
7c513058
BS		 884int nfs4_call_sync(struct rpc_clnt *clnt,
885 struct nfs_server *server,
e73b83f2
BS		 886 struct rpc_message *msg,
887 struct nfs4_sequence_args *args,
888 struct nfs4_sequence_res *res,
889 int cache_reply)
890{
a9c92d6b 891 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 892 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 893}
cccef3b9 894
38478b24 895static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 896{
38478b24 897 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 898
38478b24 899 spin_lock(&dir->i_lock);
359d7d1c 900 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 901 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 902 nfs_force_lookup_revalidate(dir);
a9a4a87a 903 dir->i_version = cinfo->after;
de242c0b 904 nfs_fscache_invalidate(dir);
38478b24 905 spin_unlock(&dir->i_lock);
1da177e4
LT		 906}
907
e56e0b78 908struct nfs4_opendata {
c6d00e63 909 struct kref kref;
e56e0b78
TM		 910 struct nfs_openargs o_arg;
911 struct nfs_openres o_res;
cdd4e68b
TM		 912 struct nfs_open_confirmargs c_arg;
913 struct nfs_open_confirmres c_res;
6926afd1
TM		 914 struct nfs4_string owner_name;
915 struct nfs4_string group_name;
e56e0b78 916 struct nfs_fattr f_attr;
1775fd3e 917 struct nfs4_label *f_label;
e56e0b78 918 struct dentry *dir;
82a2c1b7 919 struct dentry *dentry;
e56e0b78 920 struct nfs4_state_owner *owner;
aac00a8d 921 struct nfs4_state *state;
e56e0b78 922 struct iattr attrs;
26e976a8 923 unsigned long timestamp;
3e309914 924 unsigned int rpc_done : 1;
5bc2afc2 925 unsigned int file_created : 1;
bdeca1b7 926 unsigned int is_recover : 1;
24ac23ab
TM		 927 int rpc_status;
928 int cancelled;
e56e0b78
TM		 929};
930
49f9a0fa
TM		 931static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
932 int err, struct nfs4_exception *exception)
933{
934 if (err != -EINVAL)
935 return false;
936 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
937 return false;
938 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
939 exception->retry = 1;
940 return true;
941}
942
943static enum open_claim_type4
944nfs4_map_atomic_open_claim(struct nfs_server *server,
945 enum open_claim_type4 claim)
946{
947 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
948 return claim;
949 switch (claim) {
950 default:
951 return claim;
952 case NFS4_OPEN_CLAIM_FH:
953 return NFS4_OPEN_CLAIM_NULL;
954 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
955 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
956 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
957 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
958 }
959}
2ced46c2
TM		 960
961static void nfs4_init_opendata_res(struct nfs4_opendata *p)
962{
963 p->o_res.f_attr = &p->f_attr;
1775fd3e 964 p->o_res.f_label = p->f_label;
c1d51931
TM		 965 p->o_res.seqid = p->o_arg.seqid;
966 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 967 p->o_res.server = p->o_arg.server;
5f657530 968 p->o_res.access_request = p->o_arg.access;
2ced46c2 969 nfs_fattr_init(&p->f_attr);
6926afd1 970 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 971}
972
82a2c1b7 973static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 974 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 975 const struct iattr *attrs,
1775fd3e 976 struct nfs4_label *label,
4a1c0893 977 enum open_claim_type4 claim,
8535b2be 978 gfp_t gfp_mask)
e56e0b78 979{
82a2c1b7 980 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 981 struct inode *dir = parent->d_inode;
982 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 983 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 984 struct nfs4_opendata *p;
985
8535b2be 986 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 987 if (p == NULL)
988 goto err;
14c43f76
DQ		 989
990 p->f_label = nfs4_label_alloc(server, gfp_mask);
991 if (IS_ERR(p->f_label))
992 goto err_free_p;
993
63f5f796
TM		 994 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
995 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 996 if (IS_ERR(p->o_arg.seqid))
14c43f76 997 goto err_free_label;
82a2c1b7
AV		 998 nfs_sb_active(dentry->d_sb);
999 p->dentry = dget(dentry);
e56e0b78
TM		 1000 p->dir = parent;
1001 p->owner = sp;
1002 atomic_inc(&sp->so_count);
dc0b027d
TM		 1003 p->o_arg.open_flags = flags;
1004 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 1005 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1006 * will return permission denied for all bits until close */
1007 if (!(flags & O_EXCL)) {
1008 /* ask server to check for all possible rights as results
1009 * are cached */
1010 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1011 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1012 }
7539bbab 1013 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1014 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1015 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1016 p->o_arg.name = &dentry->d_name;
e56e0b78 1017 p->o_arg.server = server;
aa9c2669 1018 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1019 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1020 p->o_arg.label = label;
49f9a0fa
TM		 1021 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1022 switch (p->o_arg.claim) {
4a1c0893
TM		 1023 case NFS4_OPEN_CLAIM_NULL:
1024 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1025 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1026 p->o_arg.fh = NFS_FH(dir);
1027 break;
1028 case NFS4_OPEN_CLAIM_PREVIOUS:
1029 case NFS4_OPEN_CLAIM_FH:
1030 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1031 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1032 p->o_arg.fh = NFS_FH(dentry->d_inode);
1033 }
536e43d1 1034 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1035 __u32 verf[2];
d77d76ff 1036
e56e0b78
TM		 1037 p->o_arg.u.attrs = &p->attrs;
1038 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1039
1040 verf[0] = jiffies;
1041 verf[1] = current->pid;
1042 memcpy(p->o_arg.u.verifier.data, verf,
1043 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1044 }
cdd4e68b
TM		 1045 p->c_arg.fh = &p->o_res.fh;
1046 p->c_arg.stateid = &p->o_res.stateid;
1047 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1048 nfs4_init_opendata_res(p);
c6d00e63 1049 kref_init(&p->kref);
e56e0b78 1050 return p;
14c43f76
DQ		 1051
1052err_free_label:
1053 nfs4_label_free(p->f_label);
1054err_free_p:
e56e0b78
TM		 1055 kfree(p);
1056err:
1057 dput(parent);
1058 return NULL;
1059}
1060
c6d00e63 1061static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1062{
c6d00e63
TM		 1063 struct nfs4_opendata *p = container_of(kref,
1064 struct nfs4_opendata, kref);
82a2c1b7 1065 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1066
1067 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1068 if (p->state != NULL)
1069 nfs4_put_open_state(p->state);
c6d00e63 1070 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1071
1072 nfs4_label_free(p->f_label);
1073
c6d00e63 1074 dput(p->dir);
82a2c1b7
AV		 1075 dput(p->dentry);
1076 nfs_sb_deactive(sb);
6926afd1 1077 nfs_fattr_free_names(&p->f_attr);
e911b815 1078 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1079 kfree(p);
1080}
1081
1082static void nfs4_opendata_put(struct nfs4_opendata *p)
1083{
1084 if (p != NULL)
1085 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1086}
1087
06f814a3
TM		 1088static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1089{
06f814a3
TM		 1090 int ret;
1091
06f814a3 1092 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1093 return ret;
1094}
1095
dc0b027d 1096static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1097{
1098 int ret = 0;
dc0b027d 1099
536e43d1 1100 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1101 goto out;
1102 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1103 case FMODE_READ:
88069f77
TM		 1104 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1105 && state->n_rdonly != 0;
6ee41268
TM		 1106 break;
1107 case FMODE_WRITE:
88069f77
TM		 1108 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1109 && state->n_wronly != 0;
6ee41268
TM		 1110 break;
1111 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1112 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1113 && state->n_rdwr != 0;
6ee41268 1114 }
dc0b027d 1115out:
6ee41268
TM		 1116 return ret;
1117}
1118
dc0b027d 1119static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1120{
652f89f6
TM		 1121 if (delegation == NULL)
1122 return 0;
dc0b027d 1123 if ((delegation->type & fmode) != fmode)
aac00a8d 1124 return 0;
d25be546
TM		 1125 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1126 return 0;
b7391f44 1127 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1128 return 1;
1129}
1130
dc0b027d 1131static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1132{
dc0b027d 1133 switch (fmode) {
e7616923
TM		 1134 case FMODE_WRITE:
1135 state->n_wronly++;
1136 break;
1137 case FMODE_READ:
1138 state->n_rdonly++;
1139 break;
1140 case FMODE_READ|FMODE_WRITE:
1141 state->n_rdwr++;
1142 }
dc0b027d 1143 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1144}
1145
4f14c194
TM		 1146static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1147{
1148 struct nfs_client *clp = state->owner->so_server->nfs_client;
1149 bool need_recover = false;
1150
1151 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1152 need_recover = true;
1153 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1154 need_recover = true;
1155 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1156 need_recover = true;
1157 if (need_recover)
1158 nfs4_state_mark_reclaim_nograce(clp, state);
1159}
1160
e999e80e
TM		 1161static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1162 nfs4_stateid *stateid)
1163{
1164 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1165 return true;
4f14c194
TM		 1166 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1167 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1168 return true;
4f14c194 1169 }
e999e80e
TM		 1170 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1171 return true;
1172 return false;
1173}
1174
f95549cf
TM		 1175static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1176{
1177 if (state->n_wronly)
1178 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1179 if (state->n_rdonly)
1180 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1181 if (state->n_rdwr)
1182 set_bit(NFS_O_RDWR_STATE, &state->flags);
1183}
1184
226056c5
TM		 1185static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1186 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1187{
226056c5
TM		 1188 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1189 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1190 case FMODE_WRITE:
1191 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1192 break;
1193 case FMODE_READ:
1194 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1195 break;
1196 case 0:
1197 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1198 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1199 clear_bit(NFS_OPEN_STATE, &state->flags);
1200 }
1201 if (stateid == NULL)
1202 return;
f95549cf
TM		 1203 /* Handle races with OPEN */
1204 if (!nfs4_stateid_match_other(stateid, &state->open_stateid) ||
1205 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1206 nfs_resync_open_stateid_locked(state);
226056c5 1207 return;
f95549cf 1208 }
003707c7 1209 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1210 nfs4_stateid_copy(&state->stateid, stateid);
1211 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1212}
1213
1214static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1215{
1216 write_seqlock(&state->seqlock);
1217 nfs_clear_open_stateid_locked(state, stateid, fmode);
1218 write_sequnlock(&state->seqlock);
4f14c194
TM		 1219 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1220 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1221}
1222
dc0b027d 1223static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1224{
dc0b027d 1225 switch (fmode) {
003707c7
TM		 1226 case FMODE_READ:
1227 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1228 break;
1229 case FMODE_WRITE:
1230 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1231 break;
1232 case FMODE_READ|FMODE_WRITE:
1233 set_bit(NFS_O_RDWR_STATE, &state->flags);
1234 }
e999e80e
TM		 1235 if (!nfs_need_update_open_stateid(state, stateid))
1236 return;
1237 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1238 nfs4_stateid_copy(&state->stateid, stateid);
1239 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1240}
1241
dc0b027d 1242static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1243{
8bda4e4c
TM		 1244 /*
1245 * Protect the call to nfs4_state_set_mode_locked and
1246 * serialise the stateid update
1247 */
1248 write_seqlock(&state->seqlock);
003707c7 1249 if (deleg_stateid != NULL) {
f597c537 1250 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1251 set_bit(NFS_DELEGATED_STATE, &state->flags);
1252 }
1253 if (open_stateid != NULL)
dc0b027d 1254 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1255 write_sequnlock(&state->seqlock);
1256 spin_lock(&state->owner->so_lock);
dc0b027d 1257 update_open_stateflags(state, fmode);
ec073428 1258 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1259}
1260
dc0b027d 1261static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1262{
1263 struct nfs_inode *nfsi = NFS_I(state->inode);
1264 struct nfs_delegation *deleg_cur;
1265 int ret = 0;
1266
dc0b027d 1267 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1268
1269 rcu_read_lock();
1270 deleg_cur = rcu_dereference(nfsi->delegation);
1271 if (deleg_cur == NULL)
1272 goto no_delegation;
1273
1274 spin_lock(&deleg_cur->lock);
17f26b12 1275 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1276 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1277 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1278 goto no_delegation_unlock;
1279
1280 if (delegation == NULL)
1281 delegation = &deleg_cur->stateid;
f597c537 1282 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1283 goto no_delegation_unlock;
1284
b7391f44 1285 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1286 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1287 ret = 1;
1288no_delegation_unlock:
1289 spin_unlock(&deleg_cur->lock);
1290no_delegation:
1291 rcu_read_unlock();
1292
1293 if (!ret && open_stateid != NULL) {
dc0b027d 1294 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1295 ret = 1;
1296 }
4f14c194
TM		 1297 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1298 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1299
1300 return ret;
1301}
1302
39071e6f
TM		 1303static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1304 const nfs4_stateid *stateid)
1305{
1306 struct nfs4_state *state = lsp->ls_state;
1307 bool ret = false;
1308
1309 spin_lock(&state->state_lock);
1310 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1311 goto out_noupdate;
1312 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1313 goto out_noupdate;
1314 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1315 ret = true;
1316out_noupdate:
1317 spin_unlock(&state->state_lock);
1318 return ret;
1319}
34310430 1320
dc0b027d 1321static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1322{
1323 struct nfs_delegation *delegation;
1324
1325 rcu_read_lock();
1326 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1327 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1328 rcu_read_unlock();
1329 return;
1330 }
1331 rcu_read_unlock();
57ec14c5 1332 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1333}
1334
6ee41268 1335static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1336{
1337 struct nfs4_state *state = opendata->state;
1338 struct nfs_inode *nfsi = NFS_I(state->inode);
1339 struct nfs_delegation *delegation;
f448badd 1340 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1341 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1342 nfs4_stateid stateid;
1343 int ret = -EAGAIN;
1344
aac00a8d 1345 for (;;) {
61beef75 1346 spin_lock(&state->owner->so_lock);
dc0b027d 1347 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1348 update_open_stateflags(state, fmode);
6ee41268 1349 spin_unlock(&state->owner->so_lock);
61beef75 1350 goto out_return_state;
6ee41268 1351 }
61beef75 1352 spin_unlock(&state->owner->so_lock);
34310430
TM		 1353 rcu_read_lock();
1354 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1355 if (!can_open_delegated(delegation, fmode)) {
34310430 1356 rcu_read_unlock();
aac00a8d 1357 break;
34310430 1358 }
aac00a8d 1359 /* Save the delegation */
f597c537 1360 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1361 rcu_read_unlock();
fa332941 1362 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1363 if (!opendata->is_recover) {
1364 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1365 if (ret != 0)
1366 goto out;
1367 }
aac00a8d 1368 ret = -EAGAIN;
34310430
TM		 1369
1370 /* Try to update the stateid using the delegation */
dc0b027d 1371 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1372 goto out_return_state;
aac00a8d 1373 }
aac00a8d
TM		 1374out:
1375 return ERR_PTR(ret);
1376out_return_state:
1377 atomic_inc(&state->count);
1378 return state;
1379}
1380
e23008ec
AA		 1381static void
1382nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1383{
1384 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1385 struct nfs_delegation *delegation;
1386 int delegation_flags = 0;
1387
1388 rcu_read_lock();
1389 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1390 if (delegation)
1391 delegation_flags = delegation->flags;
1392 rcu_read_unlock();
1393 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1394 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1395 "returning a delegation for "
1396 "OPEN(CLAIM_DELEGATE_CUR)\n",
1397 clp->cl_hostname);
1398 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1399 nfs_inode_set_delegation(state->inode,
1400 data->owner->so_cred,
1401 &data->o_res);
1402 else
1403 nfs_inode_reclaim_delegation(state->inode,
1404 data->owner->so_cred,
1405 &data->o_res);
1406}
1407
1408/*
1409 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1410 * and update the nfs4_state.
1411 */
1412static struct nfs4_state *
1413_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1414{
1415 struct inode *inode = data->state->inode;
1416 struct nfs4_state *state = data->state;
1417 int ret;
1418
d2bfda2e
WAA		 1419 if (!data->rpc_done) {
1420 if (data->rpc_status) {
1421 ret = data->rpc_status;
1422 goto err;
1423 }
1424 /* cached opens have already been processed */
1425 goto update;
e23008ec
AA		 1426 }
1427
e23008ec
AA		 1428 ret = nfs_refresh_inode(inode, &data->f_attr);
1429 if (ret)
1430 goto err;
1431
1432 if (data->o_res.delegation_type != 0)
1433 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1434update:
e23008ec
AA		 1435 update_open_stateid(state, &data->o_res.stateid, NULL,
1436 data->o_arg.fmode);
d49f042a 1437 atomic_inc(&state->count);
e23008ec
AA		 1438
1439 return state;
1440err:
1441 return ERR_PTR(ret);
1442
1443}
1444
1445static struct nfs4_state *
1446_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1447{
1448 struct inode *inode;
1449 struct nfs4_state *state = NULL;
1b370bc2 1450 int ret;
24ac23ab 1451
aac00a8d 1452 if (!data->rpc_done) {
6ee41268 1453 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1454 goto out;
1455 }
1456
1b370bc2 1457 ret = -EAGAIN;
24ac23ab 1458 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1459 goto err;
1775fd3e 1460 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1461 ret = PTR_ERR(inode);
03f28e3a 1462 if (IS_ERR(inode))
1b370bc2
TM		 1463 goto err;
1464 ret = -ENOMEM;
24ac23ab
TM		 1465 state = nfs4_get_open_state(inode, data->owner);
1466 if (state == NULL)
1b370bc2 1467 goto err_put_inode;
e23008ec
AA		 1468 if (data->o_res.delegation_type != 0)
1469 nfs4_opendata_check_deleg(data, state);
34310430 1470 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1471 data->o_arg.fmode);
24ac23ab 1472 iput(inode);
aac00a8d 1473out:
7aa262b5 1474 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1475 return state;
1b370bc2
TM		 1476err_put_inode:
1477 iput(inode);
1478err:
1479 return ERR_PTR(ret);
24ac23ab
TM		 1480}
1481
e23008ec
AA		 1482static struct nfs4_state *
1483nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1484{
1485 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1486 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1487 return _nfs4_opendata_to_nfs4_state(data);
1488}
1489
864472e9
TM		 1490static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1491{
1492 struct nfs_inode *nfsi = NFS_I(state->inode);
1493 struct nfs_open_context *ctx;
1494
1495 spin_lock(&state->inode->i_lock);
1496 list_for_each_entry(ctx, &nfsi->open_files, list) {
1497 if (ctx->state != state)
1498 continue;
1499 get_nfs_open_context(ctx);
1500 spin_unlock(&state->inode->i_lock);
1501 return ctx;
1502 }
1503 spin_unlock(&state->inode->i_lock);
1504 return ERR_PTR(-ENOENT);
1505}
1506
4a1c0893
TM		 1507static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1508 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1509{
1510 struct nfs4_opendata *opendata;
1511
4a1c0893 1512 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1513 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1514 if (opendata == NULL)
1515 return ERR_PTR(-ENOMEM);
1516 opendata->state = state;
1517 atomic_inc(&state->count);
1518 return opendata;
1519}
1520
dc0b027d 1521static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1522{
2ced46c2 1523 struct nfs4_state *newstate;
864472e9
TM		 1524 int ret;
1525
dc0b027d
TM		 1526 opendata->o_arg.open_flags = 0;
1527 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1528 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1529 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1530 nfs4_init_opendata_res(opendata);
b257957e 1531 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1532 if (ret != 0)
1533 return ret;
2ced46c2 1534 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1535 if (IS_ERR(newstate))
1536 return PTR_ERR(newstate);
643168c2 1537 nfs4_close_state(newstate, fmode);
2ced46c2 1538 *res = newstate;
864472e9
TM		 1539 return 0;
1540}
1541
1542static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1543{
864472e9 1544 struct nfs4_state *newstate;
864472e9
TM		 1545 int ret;
1546
4f14c194
TM		 1547 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1548 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1549 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1550 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1551 /* memory barrier prior to reading state->n_* */
2ced46c2 1552 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1553 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1554 smp_rmb();
1555 if (state->n_rdwr != 0) {
2ced46c2 1556 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1557 if (ret != 0)
1558 return ret;
2ced46c2
TM		 1559 if (newstate != state)
1560 return -ESTALE;
864472e9
TM		 1561 }
1562 if (state->n_wronly != 0) {
2ced46c2 1563 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1564 if (ret != 0)
1565 return ret;
2ced46c2
TM		 1566 if (newstate != state)
1567 return -ESTALE;
864472e9
TM		 1568 }
1569 if (state->n_rdonly != 0) {
2ced46c2 1570 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1571 if (ret != 0)
1572 return ret;
2ced46c2
TM		 1573 if (newstate != state)
1574 return -ESTALE;
864472e9 1575 }
1ac7e2fd
TM		 1576 /*
1577 * We may have performed cached opens for all three recoveries.
1578 * Check if we need to update the current stateid.
1579 */
1580 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1581 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1582 write_seqlock(&state->seqlock);
1ac7e2fd 1583 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1584 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1585 write_sequnlock(&state->seqlock);
1ac7e2fd 1586 }
864472e9
TM		 1587 return 0;
1588}
1589
1da177e4
LT		 1590/*
1591 * OPEN_RECLAIM:
1592 * reclaim state on the server after a reboot.
1da177e4 1593 */
539cd03a 1594static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1595{
1ac7e2fd 1596 struct nfs_delegation *delegation;
864472e9 1597 struct nfs4_opendata *opendata;
dc0b027d 1598 fmode_t delegation_type = 0;
1da177e4
LT		 1599 int status;
1600
4a1c0893
TM		 1601 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1602 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1603 if (IS_ERR(opendata))
1604 return PTR_ERR(opendata);
1ac7e2fd
TM		 1605 rcu_read_lock();
1606 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1607 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1608 delegation_type = delegation->type;
1ac7e2fd 1609 rcu_read_unlock();
864472e9
TM		 1610 opendata->o_arg.u.delegation_type = delegation_type;
1611 status = nfs4_open_recover(opendata, state);
c6d00e63 1612 nfs4_opendata_put(opendata);
1da177e4
LT		 1613 return status;
1614}
1615
539cd03a 1616static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1617{
1618 struct nfs_server *server = NFS_SERVER(state->inode);
1619 struct nfs4_exception exception = { };
1620 int err;
1621 do {
539cd03a 1622 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1623 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1624 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1625 continue;
168667c4 1626 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1627 break;
1628 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1629 } while (exception.retry);
1630 return err;
1631}
1632
864472e9
TM		 1633static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1634{
1635 struct nfs_open_context *ctx;
1636 int ret;
1637
1638 ctx = nfs4_state_find_open_context(state);
1639 if (IS_ERR(ctx))
91876b13 1640 return -EAGAIN;
539cd03a 1641 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1642 put_nfs_open_context(ctx);
1643 return ret;
1644}
1645
db4f2e63 1646static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1647{
be76b5b6
TM		 1648 switch (err) {
1649 default:
1650 printk(KERN_ERR "NFS: %s: unhandled error "
1651 "%d.\n", __func__, err);
1652 case 0:
1653 case -ENOENT:
1654 case -ESTALE:
1655 break;
1656 case -NFS4ERR_BADSESSION:
1657 case -NFS4ERR_BADSLOT:
1658 case -NFS4ERR_BAD_HIGH_SLOT:
1659 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1660 case -NFS4ERR_DEADSESSION:
1661 set_bit(NFS_DELEGATED_STATE, &state->flags);
1662 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1663 return -EAGAIN;
1664 case -NFS4ERR_STALE_CLIENTID:
1665 case -NFS4ERR_STALE_STATEID:
1666 set_bit(NFS_DELEGATED_STATE, &state->flags);
1667 case -NFS4ERR_EXPIRED:
1668 /* Don't recall a delegation if it was lost */
1669 nfs4_schedule_lease_recovery(server->nfs_client);
1670 return -EAGAIN;
352297b9
CL		 1671 case -NFS4ERR_MOVED:
1672 nfs4_schedule_migration_recovery(server);
1673 return -EAGAIN;
8ef2f8d4
CL		 1674 case -NFS4ERR_LEASE_MOVED:
1675 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1676 return -EAGAIN;
be76b5b6
TM		 1677 case -NFS4ERR_DELEG_REVOKED:
1678 case -NFS4ERR_ADMIN_REVOKED:
1679 case -NFS4ERR_BAD_STATEID:
db4f2e63 1680 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1681 nfs_inode_find_state_and_recover(state->inode,
1682 stateid);
1683 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1684 return -EAGAIN;
be76b5b6
TM		 1685 case -NFS4ERR_DELAY:
1686 case -NFS4ERR_GRACE:
1687 set_bit(NFS_DELEGATED_STATE, &state->flags);
1688 ssleep(1);
1689 return -EAGAIN;
db4f2e63
TM		 1690 case -ENOMEM:
1691 case -NFS4ERR_DENIED:
1692 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1693 return 0;
be76b5b6 1694 }
1da177e4
LT		 1695 return err;
1696}
1697
db4f2e63
TM		 1698int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1699{
1700 struct nfs_server *server = NFS_SERVER(state->inode);
1701 struct nfs4_opendata *opendata;
1702 int err;
1703
1704 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1705 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1706 if (IS_ERR(opendata))
1707 return PTR_ERR(opendata);
1708 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1709 err = nfs4_open_recover(opendata, state);
1710 nfs4_opendata_put(opendata);
1711 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1712}
1713
be05c860
CL		 1714static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1715{
1716 struct nfs4_opendata *data = calldata;
1717
cb04ad2a
PT		 1718 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1719 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1720}
1721
cdd4e68b
TM		 1722static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1723{
1724 struct nfs4_opendata *data = calldata;
1725
17ead6c8 1726 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1727
cdd4e68b 1728 data->rpc_status = task->tk_status;
26e976a8 1729 if (data->rpc_status == 0) {
f597c537 1730 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1731 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1732 renew_lease(data->o_res.server, data->timestamp);
3e309914 1733 data->rpc_done = 1;
26e976a8 1734 }
cdd4e68b
TM		 1735}
1736
1737static void nfs4_open_confirm_release(void *calldata)
1738{
1739 struct nfs4_opendata *data = calldata;
1740 struct nfs4_state *state = NULL;
1741
1742 /* If this request hasn't been cancelled, do nothing */
1743 if (data->cancelled == 0)
1744 goto out_free;
1745 /* In case of error, no cleanup! */
3e309914 1746 if (!data->rpc_done)
cdd4e68b 1747 goto out_free;
cdd4e68b 1748 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1749 if (!IS_ERR(state))
643168c2 1750 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1751out_free:
c6d00e63 1752 nfs4_opendata_put(data);
cdd4e68b
TM		 1753}
1754
1755static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1756 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1757 .rpc_call_done = nfs4_open_confirm_done,
1758 .rpc_release = nfs4_open_confirm_release,
1759};
1760
1761/*
1762 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1763 */
1764static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1765{
1766 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1767 struct rpc_task *task;
5138fde0
TM		 1768 struct rpc_message msg = {
1769 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1770 .rpc_argp = &data->c_arg,
1771 .rpc_resp = &data->c_res,
1772 .rpc_cred = data->owner->so_cred,
1773 };
c970aa85
TM		 1774 struct rpc_task_setup task_setup_data = {
1775 .rpc_client = server->client,
5138fde0 1776 .rpc_message = &msg,
c970aa85
TM		 1777 .callback_ops = &nfs4_open_confirm_ops,
1778 .callback_data = data,
101070ca 1779 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1780 .flags = RPC_TASK_ASYNC,
1781 };
1da177e4
LT		 1782 int status;
1783
17ead6c8 1784 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1785 kref_get(&data->kref);
3e309914
TM		 1786 data->rpc_done = 0;
1787 data->rpc_status = 0;
5138fde0 1788 data->timestamp = jiffies;
c970aa85 1789 task = rpc_run_task(&task_setup_data);
7a1218a2 1790 if (IS_ERR(task))
cdd4e68b 1791 return PTR_ERR(task);
cdd4e68b
TM		 1792 status = nfs4_wait_for_completion_rpc_task(task);
1793 if (status != 0) {
1794 data->cancelled = 1;
1795 smp_wmb();
1796 } else
1797 status = data->rpc_status;
e6b3c4db 1798 rpc_put_task(task);
1da177e4
LT		 1799 return status;
1800}
1801
24ac23ab 1802static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1803{
24ac23ab
TM		 1804 struct nfs4_opendata *data = calldata;
1805 struct nfs4_state_owner *sp = data->owner;
549b19cc 1806 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1807
24ac23ab 1808 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1809 goto out_wait;
aac00a8d
TM		 1810 /*
1811 * Check if we still need to send an OPEN call, or if we can use
1812 * a delegation instead.
1813 */
1814 if (data->state != NULL) {
1815 struct nfs_delegation *delegation;
1816
dc0b027d 1817 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1818 goto out_no_action;
aac00a8d
TM		 1819 rcu_read_lock();
1820 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1821 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1822 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1823 can_open_delegated(delegation, data->o_arg.fmode))
1824 goto unlock_no_action;
aac00a8d
TM		 1825 rcu_read_unlock();
1826 }
95b72eb0 1827 /* Update client id. */
549b19cc 1828 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1829 switch (data->o_arg.claim) {
1830 case NFS4_OPEN_CLAIM_PREVIOUS:
1831 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1832 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1833 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1834 case NFS4_OPEN_CLAIM_FH:
1835 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1836 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1837 }
26e976a8 1838 data->timestamp = jiffies;
035168ab 1839 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1840 &data->o_arg.seq_args,
2240a9e2
TM		 1841 &data->o_res.seq_res,
1842 task) != 0)
1843 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1844
1845 /* Set the create mode (note dependency on the session type) */
1846 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1847 if (data->o_arg.open_flags & O_EXCL) {
1848 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1849 if (nfs4_has_persistent_session(clp))
1850 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1851 else if (clp->cl_mvops->minor_version > 0)
1852 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1853 }
6ee41268 1854 return;
652f89f6
TM		 1855unlock_no_action:
1856 rcu_read_unlock();
6ee41268
TM		 1857out_no_action:
1858 task->tk_action = NULL;
c8da19b9 1859out_wait:
b75ad4cd 1860 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1861}
1862
24ac23ab
TM		 1863static void nfs4_open_done(struct rpc_task *task, void *calldata)
1864{
1865 struct nfs4_opendata *data = calldata;
1da177e4 1866
24ac23ab 1867 data->rpc_status = task->tk_status;
d898528c 1868
14516c3a
TM		 1869 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1870 return;
d898528c 1871
24ac23ab 1872 if (task->tk_status == 0) {
807d66d8
TM		 1873 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1874 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1875 case S_IFREG:
1876 break;
1877 case S_IFLNK:
24ac23ab 1878 data->rpc_status = -ELOOP;
6f926b5b
TM		 1879 break;
1880 case S_IFDIR:
24ac23ab 1881 data->rpc_status = -EISDIR;
6f926b5b
TM		 1882 break;
1883 default:
24ac23ab 1884 data->rpc_status = -ENOTDIR;
807d66d8 1885 }
6f926b5b 1886 }
26e976a8 1887 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1888 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1889 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1890 }
3e309914 1891 data->rpc_done = 1;
24ac23ab 1892}
6f926b5b 1893
24ac23ab
TM		 1894static void nfs4_open_release(void *calldata)
1895{
1896 struct nfs4_opendata *data = calldata;
1897 struct nfs4_state *state = NULL;
1898
1899 /* If this request hasn't been cancelled, do nothing */
1900 if (data->cancelled == 0)
1901 goto out_free;
1902 /* In case of error, no cleanup! */
3e309914 1903 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1904 goto out_free;
1905 /* In case we need an open_confirm, no cleanup! */
1906 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1907 goto out_free;
24ac23ab 1908 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1909 if (!IS_ERR(state))
643168c2 1910 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1911out_free:
c6d00e63 1912 nfs4_opendata_put(data);
24ac23ab
TM		 1913}
1914
1915static const struct rpc_call_ops nfs4_open_ops = {
1916 .rpc_call_prepare = nfs4_open_prepare,
1917 .rpc_call_done = nfs4_open_done,
1918 .rpc_release = nfs4_open_release,
1919};
1920
b257957e 1921static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1922{
1923 struct inode *dir = data->dir->d_inode;
1924 struct nfs_server *server = NFS_SERVER(dir);
1925 struct nfs_openargs *o_arg = &data->o_arg;
1926 struct nfs_openres *o_res = &data->o_res;
1927 struct rpc_task *task;
5138fde0
TM		 1928 struct rpc_message msg = {
1929 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1930 .rpc_argp = o_arg,
1931 .rpc_resp = o_res,
1932 .rpc_cred = data->owner->so_cred,
1933 };
c970aa85
TM		 1934 struct rpc_task_setup task_setup_data = {
1935 .rpc_client = server->client,
5138fde0 1936 .rpc_message = &msg,
c970aa85
TM		 1937 .callback_ops = &nfs4_open_ops,
1938 .callback_data = data,
101070ca 1939 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1940 .flags = RPC_TASK_ASYNC,
1941 };
24ac23ab
TM		 1942 int status;
1943
a9c92d6b 1944 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1945 kref_get(&data->kref);
3e309914
TM		 1946 data->rpc_done = 0;
1947 data->rpc_status = 0;
2ced46c2 1948 data->cancelled = 0;
bdeca1b7
TM		 1949 data->is_recover = 0;
1950 if (isrecover) {
8fe72bac 1951 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1952 data->is_recover = 1;
1953 }
c970aa85 1954 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1955 if (IS_ERR(task))
1956 return PTR_ERR(task);
1957 status = nfs4_wait_for_completion_rpc_task(task);
1958 if (status != 0) {
1959 data->cancelled = 1;
1960 smp_wmb();
1961 } else
1962 status = data->rpc_status;
1963 rpc_put_task(task);
1964
1965 return status;
1966}
1967
1968static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1969{
1970 struct inode *dir = data->dir->d_inode;
1971 struct nfs_openres *o_res = &data->o_res;
1972 int status;
1973
1974 status = nfs4_run_open_task(data, 1);
1975 if (status != 0 || !data->rpc_done)
1976 return status;
1977
6926afd1
TM		 1978 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1979
b257957e
AB		 1980 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1981 status = _nfs4_proc_open_confirm(data);
1982 if (status != 0)
1983 return status;
1984 }
1985
1986 return status;
1987}
1988
f3792d63
TM		 1989/*
1990 * Additional permission checks in order to distinguish between an
1991 * open for read, and an open for execute. This works around the
1992 * fact that NFSv4 OPEN treats read and execute permissions as being
1993 * the same.
1994 * Note that in the non-execute case, we want to turn off permission
1995 * checking if we just created a new file (POSIX open() semantics).
1996 */
6168f62c
WAA		 1997static int nfs4_opendata_access(struct rpc_cred *cred,
1998 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1999 struct nfs4_state *state, fmode_t fmode,
2000 int openflags)
6168f62c
WAA		 2001{
2002 struct nfs_access_entry cache;
2003 u32 mask;
2004
2005 /* access call failed or for some reason the server doesn't
2006 * support any access modes -- defer access call until later */
2007 if (opendata->o_res.access_supported == 0)
2008 return 0;
2009
2010 mask = 0;
f3792d63
TM		 2011 /*
2012 * Use openflags to check for exec, because fmode won't
2013 * always have FMODE_EXEC set when file open for exec.
2014 */
f8d9a897
WAA		 2015 if (openflags & __FMODE_EXEC) {
2016 /* ONLY check for exec rights */
2017 mask = MAY_EXEC;
f3792d63 2018 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2019 mask = MAY_READ;
6168f62c
WAA		 2020
2021 cache.cred = cred;
2022 cache.jiffies = jiffies;
2023 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2024 nfs_access_add_cache(state->inode, &cache);
2025
bbd3a8ee 2026 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2027 return 0;
2028
2029 /* even though OPEN succeeded, access is denied. Close the file */
2030 nfs4_close_state(state, fmode);
998f40b5 2031 return -EACCES;
6168f62c
WAA		 2032}
2033
b257957e
AB		 2034/*
2035 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2036 */
2037static int _nfs4_proc_open(struct nfs4_opendata *data)
2038{
2039 struct inode *dir = data->dir->d_inode;
2040 struct nfs_server *server = NFS_SERVER(dir);
2041 struct nfs_openargs *o_arg = &data->o_arg;
2042 struct nfs_openres *o_res = &data->o_res;
2043 int status;
2044
2045 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2046 if (!data->rpc_done)
2047 return status;
2048 if (status != 0) {
2049 if (status == -NFS4ERR_BADNAME &&
2050 !(o_arg->open_flags & O_CREAT))
2051 return -ENOENT;
24ac23ab 2052 return status;
08ef7bd3 2053 }
24ac23ab 2054
6926afd1
TM		 2055 nfs_fattr_map_and_free_names(server, &data->f_attr);
2056
5bc2afc2 2057 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2058 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2059 if (o_arg->open_flags & O_EXCL)
2060 data->file_created = 1;
2061 else if (o_res->cinfo.before != o_res->cinfo.after)
2062 data->file_created = 1;
2063 }
0df5dd4a
TM		 2064 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2065 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2066 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2067 status = _nfs4_proc_open_confirm(data);
1da177e4 2068 if (status != 0)
24ac23ab 2069 return status;
1da177e4
LT		 2070 }
2071 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2072 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2073 return 0;
1da177e4
LT		 2074}
2075
d83217c1
AA		 2076static int nfs4_recover_expired_lease(struct nfs_server *server)
2077{
2078 return nfs4_client_recover_expired_lease(server->nfs_client);
2079}
2080
1da177e4
LT		 2081/*
2082 * OPEN_EXPIRED:
2083 * reclaim state on the server after a network partition.
2084 * Assumes caller holds the appropriate lock
2085 */
539cd03a 2086static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2087{
e56e0b78 2088 struct nfs4_opendata *opendata;
864472e9 2089 int ret;
1da177e4 2090
4a1c0893 2091 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2092 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2093 if (IS_ERR(opendata))
2094 return PTR_ERR(opendata);
864472e9 2095 ret = nfs4_open_recover(opendata, state);
35d05778 2096 if (ret == -ESTALE)
3d4ff43d 2097 d_drop(ctx->dentry);
c6d00e63 2098 nfs4_opendata_put(opendata);
864472e9 2099 return ret;
1da177e4
LT		 2100}
2101
a9ed2e25 2102static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2103{
539cd03a 2104 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2105 struct nfs4_exception exception = { };
2106 int err;
2107
2108 do {
539cd03a 2109 err = _nfs4_open_expired(ctx, state);
42113a75 2110 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2111 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2112 continue;
a9ed2e25
TM		 2113 switch (err) {
2114 default:
2115 goto out;
2116 case -NFS4ERR_GRACE:
2117 case -NFS4ERR_DELAY:
2118 nfs4_handle_exception(server, err, &exception);
2119 err = 0;
2120 }
202b50dc 2121 } while (exception.retry);
a9ed2e25 2122out:
202b50dc
TM		 2123 return err;
2124}
2125
1da177e4
LT		 2126static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2127{
1da177e4 2128 struct nfs_open_context *ctx;
864472e9 2129 int ret;
1da177e4 2130
864472e9
TM		 2131 ctx = nfs4_state_find_open_context(state);
2132 if (IS_ERR(ctx))
91876b13 2133 return -EAGAIN;
539cd03a 2134 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2135 put_nfs_open_context(ctx);
2136 return ret;
1da177e4
LT		 2137}
2138
4dfd4f7a
TM		 2139static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2140{
2141 nfs_remove_bad_delegation(state->inode);
2142 write_seqlock(&state->seqlock);
2143 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2144 write_sequnlock(&state->seqlock);
2145 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2146}
2147
2148static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2149{
2150 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2151 nfs_finish_clear_delegation_stateid(state);
2152}
2153
2154static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2155{
2156 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2157 nfs40_clear_delegation_stateid(state);
2158 return nfs4_open_expired(sp, state);
2159}
2160
f062eb6c 2161#if defined(CONFIG_NFS_V4_1)
0c116cad 2162static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2163{
f062eb6c 2164 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2165 nfs4_stateid stateid;
ab7cb0df 2166 struct nfs_delegation *delegation;
0c116cad
TM		 2167 struct rpc_cred *cred;
2168 int status;
3e60ffdd 2169
ab7cb0df
TM		 2170 /* Get the delegation credential for use by test/free_stateid */
2171 rcu_read_lock();
2172 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2173 if (delegation == NULL) {
ab7cb0df 2174 rcu_read_unlock();
0c116cad
TM		 2175 return;
2176 }
2177
2178 nfs4_stateid_copy(&stateid, &delegation->stateid);
2179 cred = get_rpccred(delegation->cred);
2180 rcu_read_unlock();
2181 status = nfs41_test_stateid(server, &stateid, cred);
2182 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2183
3e60ffdd
CL		 2184 if (status != NFS_OK) {
2185 /* Free the stateid unless the server explicitly
2186 * informs us the stateid is unrecognized. */
2187 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2188 nfs41_free_stateid(server, &stateid, cred);
2189 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2190 }
ab7cb0df 2191
0c116cad 2192 put_rpccred(cred);
3e60ffdd
CL		 2193}
2194
2195/**
2196 * nfs41_check_open_stateid - possibly free an open stateid
2197 *
2198 * @state: NFSv4 state for an inode
2199 *
2200 * Returns NFS_OK if recovery for this stateid is now finished.
2201 * Otherwise a negative NFS4ERR value is returned.
2202 */
2203static int nfs41_check_open_stateid(struct nfs4_state *state)
2204{
2205 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2206 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2207 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2208 int status;
2209
2210 /* If a state reset has been done, test_stateid is unneeded */
2211 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2212 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2213 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2214 return -NFS4ERR_BAD_STATEID;
2215
ab7cb0df 2216 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2217 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2218 if (status != NFS_OK) {
2219 /* Free the stateid unless the server explicitly
2220 * informs us the stateid is unrecognized. */
2221 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2222 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2223
2224 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2225 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2226 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2227 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2228 }
2229 return status;
2230}
2231
2232static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2233{
eb64cf96 2234 int status;
b01dd1d8 2235
0c116cad 2236 nfs41_check_delegation_stateid(state);
3e60ffdd 2237 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2238 if (status != NFS_OK)
2239 status = nfs4_open_expired(sp, state);
2240 return status;
f062eb6c
BS		 2241}
2242#endif
2243
aa53ed54
JL		 2244/*
2245 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2246 * fields corresponding to attributes that were used to store the verifier.
2247 * Make sure we clobber those fields in the later setattr call
2248 */
2249static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2250{
2251 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2252 !(sattr->ia_valid & ATTR_ATIME_SET))
2253 sattr->ia_valid |= ATTR_ATIME;
2254
2255 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2256 !(sattr->ia_valid & ATTR_MTIME_SET))
2257 sattr->ia_valid |= ATTR_MTIME;
2258}
2259
c21443c2
TM		 2260static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2261 fmode_t fmode,
2262 int flags,
3efb9722 2263 struct nfs_open_context *ctx)
c21443c2
TM		 2264{
2265 struct nfs4_state_owner *sp = opendata->owner;
2266 struct nfs_server *server = sp->so_server;
275bb307 2267 struct dentry *dentry;
c21443c2
TM		 2268 struct nfs4_state *state;
2269 unsigned int seq;
2270 int ret;
2271
2272 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2273
2274 ret = _nfs4_proc_open(opendata);
dca78001 2275 if (ret != 0)
c21443c2
TM		 2276 goto out;
2277
2278 state = nfs4_opendata_to_nfs4_state(opendata);
2279 ret = PTR_ERR(state);
2280 if (IS_ERR(state))
2281 goto out;
2282 if (server->caps & NFS_CAP_POSIX_LOCK)
2283 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2284
275bb307
TM		 2285 dentry = opendata->dentry;
2286 if (dentry->d_inode == NULL) {
2287 /* FIXME: Is this d_drop() ever needed? */
2288 d_drop(dentry);
2289 dentry = d_add_unique(dentry, igrab(state->inode));
2290 if (dentry == NULL) {
2291 dentry = opendata->dentry;
2292 } else if (dentry != ctx->dentry) {
2293 dput(ctx->dentry);
2294 ctx->dentry = dget(dentry);
2295 }
2296 nfs_set_verifier(dentry,
2297 nfs_save_change_attribute(opendata->dir->d_inode));
2298 }
2299
c21443c2
TM		 2300 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2301 if (ret != 0)
2302 goto out;
2303
3efb9722 2304 ctx->state = state;
c45ffdd2
TM		 2305 if (dentry->d_inode == state->inode) {
2306 nfs_inode_attach_open_context(ctx);
2307 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2308 nfs4_schedule_stateid_recovery(server, state);
2309 }
c21443c2
TM		 2310out:
2311 return ret;
2312}
2313
1da177e4 2314/*
24ac23ab 2315 * Returns a referenced nfs4_state
1da177e4 2316 */
82be417a 2317static int _nfs4_do_open(struct inode *dir,
4197a055 2318 struct nfs_open_context *ctx,
82be417a
AA		 2319 int flags,
2320 struct iattr *sattr,
5bc2afc2
TM		 2321 struct nfs4_label *label,
2322 int *opened)
1da177e4
LT		 2323{
2324 struct nfs4_state_owner *sp;
2325 struct nfs4_state *state = NULL;
2326 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2327 struct nfs4_opendata *opendata;
4197a055
TM		 2328 struct dentry *dentry = ctx->dentry;
2329 struct rpc_cred *cred = ctx->cred;
2330 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2331 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2332 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2333 struct nfs4_label *olabel = NULL;
aac00a8d 2334 int status;
1da177e4
LT		 2335
2336 /* Protect against reboot recovery conflicts */
1da177e4 2337 status = -ENOMEM;
d1e284d5
TM		 2338 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2339 if (sp == NULL) {
1da177e4
LT		 2340 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2341 goto out_err;
2342 }
58d9714a
TM		 2343 status = nfs4_recover_expired_lease(server);
2344 if (status != 0)
b4454fe1 2345 goto err_put_state_owner;
82a2c1b7
AV		 2346 if (dentry->d_inode != NULL)
2347 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2348 status = -ENOMEM;
49f9a0fa
TM		 2349 if (dentry->d_inode)
2350 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2351 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2352 label, claim, GFP_KERNEL);
e56e0b78 2353 if (opendata == NULL)
95d35cb4 2354 goto err_put_state_owner;
1da177e4 2355
14c43f76
DQ		 2356 if (label) {
2357 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2358 if (IS_ERR(olabel)) {
2359 status = PTR_ERR(olabel);
2360 goto err_opendata_put;
2361 }
2362 }
2363
e911b815
TM		 2364 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2365 if (!opendata->f_attr.mdsthreshold) {
2366 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2367 if (!opendata->f_attr.mdsthreshold)
2368 goto err_free_label;
2369 }
1549210f 2370 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2371 }
82a2c1b7
AV		 2372 if (dentry->d_inode != NULL)
2373 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2374
3efb9722 2375 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2376 if (status != 0)
14c43f76 2377 goto err_free_label;
3efb9722 2378 state = ctx->state;
6168f62c 2379
549b19cc
TM		 2380 if ((opendata->o_arg.open_flags & O_EXCL) &&
2381 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2382 nfs4_exclusive_attrset(opendata, sattr);
2383
2384 nfs_fattr_init(opendata->o_res.f_attr);
2385 status = nfs4_do_setattr(state->inode, cred,
2386 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2387 state, label, olabel);
2388 if (status == 0) {
0ab64e0e 2389 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2390 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2391 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2392 }
0ab64e0e 2393 }
5bc2afc2
TM		 2394 if (opendata->file_created)
2395 *opened |= FILE_CREATED;
82be417a 2396
e911b815 2397 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2398 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2399 opendata->f_attr.mdsthreshold = NULL;
2400 }
82be417a 2401
14c43f76
DQ		 2402 nfs4_label_free(olabel);
2403
c6d00e63 2404 nfs4_opendata_put(opendata);
1da177e4 2405 nfs4_put_state_owner(sp);
1da177e4 2406 return 0;
14c43f76
DQ		 2407err_free_label:
2408 nfs4_label_free(olabel);
c6d00e63
TM		 2409err_opendata_put:
2410 nfs4_opendata_put(opendata);
e56e0b78
TM		 2411err_put_state_owner:
2412 nfs4_put_state_owner(sp);
1da177e4 2413out_err:
1da177e4
LT		 2414 return status;
2415}
2416
2417
82be417a 2418static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2419 struct nfs_open_context *ctx,
82be417a
AA		 2420 int flags,
2421 struct iattr *sattr,
5bc2afc2
TM		 2422 struct nfs4_label *label,
2423 int *opened)
1da177e4 2424{
49f9a0fa 2425 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2426 struct nfs4_exception exception = { };
2427 struct nfs4_state *res;
2428 int status;
2429
2430 do {
5bc2afc2 2431 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2432 res = ctx->state;
42113a75 2433 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2434 if (status == 0)
2435 break;
2436 /* NOTE: BAD_SEQID means the server and client disagree about the
2437 * book-keeping w.r.t. state-changing operations
2438 * (OPEN/CLOSE/LOCK/LOCKU...)
2439 * It is actually a sign of a bug on the client or on the server.
2440 *
2441 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2442 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2443 * have unhashed the old state_owner for us, and that we can
2444 * therefore safely retry using a new one. We should still warn
2445 * the user though...
2446 */
2447 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2448 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2449 " returned a bad sequence-id error!\n",
2450 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2451 exception.retry = 1;
2452 continue;
2453 }
550f5747
TM		 2454 /*
2455 * BAD_STATEID on OPEN means that the server cancelled our
2456 * state before it received the OPEN_CONFIRM.
2457 * Recover by retrying the request as per the discussion
2458 * on Page 181 of RFC3530.
2459 */
2460 if (status == -NFS4ERR_BAD_STATEID) {
2461 exception.retry = 1;
2462 continue;
2463 }
aac00a8d
TM		 2464 if (status == -EAGAIN) {
2465 /* We must have found a delegation */
2466 exception.retry = 1;
2467 continue;
2468 }
49f9a0fa
TM		 2469 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2470 continue;
2471 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2472 status, &exception));
2473 } while (exception.retry);
2474 return res;
2475}
2476
659bfcd6
TM		 2477static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2478 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2479 struct nfs4_state *state, struct nfs4_label *ilabel,
2480 struct nfs4_label *olabel)
1da177e4 2481{
3e4f6290 2482 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2483 struct nfs_setattrargs arg = {
3e4f6290 2484 .fh = NFS_FH(inode),
1da177e4
LT		 2485 .iap = sattr,
2486 .server = server,
2487 .bitmask = server->attr_bitmask,
1775fd3e 2488 .label = ilabel,
1da177e4
LT		 2489 };
2490 struct nfs_setattrres res = {
2491 .fattr = fattr,
1775fd3e 2492 .label = olabel,
1da177e4
LT		 2493 .server = server,
2494 };
2495 struct rpc_message msg = {
659bfcd6
TM		 2496 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2497 .rpc_argp = &arg,
2498 .rpc_resp = &res,
2499 .rpc_cred = cred,
1da177e4 2500 };
26e976a8 2501 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2502 fmode_t fmode;
2503 bool truncate;
65e4308d 2504 int status;
1da177e4 2505
aa9c2669
DQ		 2506 arg.bitmask = nfs4_bitmask(server, ilabel);
2507 if (ilabel)
2508 arg.bitmask = nfs4_bitmask(server, olabel);
2509
0e574af1 2510 nfs_fattr_init(fattr);
1da177e4 2511
ee3ae84e
TM		 2512 /* Servers should only apply open mode checks for file size changes */
2513 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2514 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2515
2516 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2517 /* Use that stateid */
0418dae1 2518 } else if (truncate && state != NULL) {
2a369153
TM		 2519 struct nfs_lockowner lockowner = {
2520 .l_owner = current->files,
2521 .l_pid = current->tgid,
2522 };
0418dae1
TM		 2523 if (!nfs4_valid_open_stateid(state))
2524 return -EBADF;
2525 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2526 &lockowner) == -EIO)
2527 return -EBADF;
08e9eac4 2528 } else
f597c537 2529 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2530
7c513058 2531 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2532 if (status == 0 && state != NULL)
2533 renew_lease(server, timestamp);
65e4308d 2534 return status;
1da177e4
LT		 2535}
2536
659bfcd6
TM		 2537static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2538 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2539 struct nfs4_state *state, struct nfs4_label *ilabel,
2540 struct nfs4_label *olabel)
1da177e4 2541{
3e4f6290 2542 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2543 struct nfs4_exception exception = {
2544 .state = state,
3114ea7a 2545 .inode = inode,
a1d0b5ee 2546 };
1da177e4
LT		 2547 int err;
2548 do {
1775fd3e 2549 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2550 trace_nfs4_setattr(inode, err);
451146be
TM		 2551 switch (err) {
2552 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2553 if (!(sattr->ia_valid & ATTR_SIZE)) {
2554 pr_warn_once("NFSv4: server %s is incorrectly "
2555 "applying open mode checks to "
2556 "a SETATTR that is not "
2557 "changing file size.\n",
2558 server->nfs_client->cl_hostname);
2559 }
451146be
TM		 2560 if (state && !(state->state & FMODE_WRITE)) {
2561 err = -EBADF;
2562 if (sattr->ia_valid & ATTR_OPEN)
2563 err = -EACCES;
2564 goto out;
2565 }
2566 }
2567 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2568 } while (exception.retry);
451146be 2569out:
1da177e4
LT		 2570 return err;
2571}
2572
2573struct nfs4_closedata {
2574 struct inode *inode;
2575 struct nfs4_state *state;
2576 struct nfs_closeargs arg;
2577 struct nfs_closeres res;
516a6af6 2578 struct nfs_fattr fattr;
26e976a8 2579 unsigned long timestamp;
f7e8917a
FI		 2580 bool roc;
2581 u32 roc_barrier;
1da177e4
LT		 2582};
2583
963d8fe5 2584static void nfs4_free_closedata(void *data)
9512135d 2585{
963d8fe5
TM		 2586 struct nfs4_closedata *calldata = data;
2587 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2588 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2589
f7e8917a
FI		 2590 if (calldata->roc)
2591 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2592 nfs4_put_open_state(calldata->state);
2593 nfs_free_seqid(calldata->arg.seqid);
9512135d 2594 nfs4_put_state_owner(sp);
322b2b90 2595 nfs_sb_deactive(sb);
9512135d
TM		 2596 kfree(calldata);
2597}
2598
963d8fe5 2599static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2600{
963d8fe5 2601 struct nfs4_closedata *calldata = data;
1da177e4 2602 struct nfs4_state *state = calldata->state;
1da177e4 2603 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2604 nfs4_stateid *res_stateid = NULL;
1da177e4 2605
a3ca5651 2606 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2607 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2608 return;
42113a75 2609 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2610 /* hmm. we are done with the inode, and in the process of freeing
2611 * the state_owner. we keep this around to process errors
2612 */
1da177e4
LT		 2613 switch (task->tk_status) {
2614 case 0:
412f6c4c
TM		 2615 res_stateid = &calldata->res.stateid;
2616 if (calldata->arg.fmode == 0 && calldata->roc)
f7e8917a
FI		 2617 pnfs_roc_set_barrier(state->inode,
2618 calldata->roc_barrier);
26e976a8 2619 renew_lease(server, calldata->timestamp);
412f6c4c 2620 break;
69794ad7 2621 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2622 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2623 case -NFS4ERR_OLD_STATEID:
2624 case -NFS4ERR_BAD_STATEID:
1da177e4 2625 case -NFS4ERR_EXPIRED:
566fcec6
TM		 2626 if (!nfs4_stateid_match(&calldata->arg.stateid,
2627 &state->stateid)) {
2628 rpc_restart_call_prepare(task);
2629 goto out_release;
2630 }
dc0b027d 2631 if (calldata->arg.fmode == 0)
9e33bed5 2632 break;
1da177e4 2633 default:
8478eaa1 2634 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2635 rpc_restart_call_prepare(task);
69794ad7
TM		 2636 goto out_release;
2637 }
1da177e4 2638 }
412f6c4c 2639 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
69794ad7 2640out_release:
72211dbe 2641 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2642 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2643 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2644}
2645
4ce70ada 2646static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2647{
4ce70ada 2648 struct nfs4_closedata *calldata = data;
9512135d 2649 struct nfs4_state *state = calldata->state;
7fdab069 2650 struct inode *inode = calldata->inode;
aee7af35 2651 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2652 int call_close = 0;
9512135d 2653
a3ca5651 2654 dprintk("%s: begin!\n", __func__);
963d8fe5 2655 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2656 goto out_wait;
003707c7 2657
88069f77 2658 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2659 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2660 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2661 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2662 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
566fcec6 2663 nfs4_stateid_copy(&calldata->arg.stateid, &state->stateid);
003707c7 2664 /* Calculate the change in open mode */
cd9288ff 2665 calldata->arg.fmode = 0;
e7616923 2666 if (state->n_rdwr == 0) {
cd9288ff
TM		 2667 if (state->n_rdonly == 0)
2668 call_close |= is_rdonly;
2669 else if (is_rdonly)
2670 calldata->arg.fmode |= FMODE_READ;
2671 if (state->n_wronly == 0)
2672 call_close |= is_wronly;
2673 else if (is_wronly)
2674 calldata->arg.fmode |= FMODE_WRITE;
2675 } else if (is_rdwr)
2676 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2677
2678 if (calldata->arg.fmode == 0)
2679 call_close |= is_rdwr;
2680
5d422301
TM		 2681 if (!nfs4_valid_open_stateid(state))
2682 call_close = 0;
4cecb76f 2683 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2684
2685 if (!call_close) {
963d8fe5 2686 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2687 goto out_no_action;
9512135d 2688 }
88069f77 2689
f7e8917a 2690 if (calldata->arg.fmode == 0) {
88069f77 2691 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2692 if (calldata->roc &&
b9536ad5
AA		 2693 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2694 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2695 goto out_wait;
b9536ad5 2696 }
f7e8917a 2697 }
88069f77 2698
516a6af6 2699 nfs_fattr_init(calldata->res.fattr);
26e976a8 2700 calldata->timestamp = jiffies;
7fdab069 2701 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2702 &calldata->arg.seq_args,
2703 &calldata->res.seq_res,
2240a9e2
TM		 2704 task) != 0)
2705 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2706 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2707 return;
2708out_no_action:
2709 task->tk_action = NULL;
2710out_wait:
2711 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2712}
2713
963d8fe5 2714static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2715 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2716 .rpc_call_done = nfs4_close_done,
2717 .rpc_release = nfs4_free_closedata,
2718};
2719
fe08c546
PT		 2720static bool nfs4_roc(struct inode *inode)
2721{
40dd4b7a 2722 if (!nfs_have_layout(inode))
fe08c546 2723 return false;
fe08c546
PT		 2724 return pnfs_roc(inode);
2725}
2726
1da177e4
LT		 2727/*
2728 * It is possible for data to be read/written from a mem-mapped file
2729 * after the sys_close call (which hits the vfs layer as a flush).
2730 * This means that we can't safely call nfsv4 close on a file until
2731 * the inode is cleared. This in turn means that we are not good
2732 * NFSv4 citizens - we do not indicate to the server to update the file's
2733 * share state even when we are done with one of the three share
2734 * stateid's in the inode.
2735 *
2736 * NOTE: Caller must be holding the sp->so_owner semaphore!
2737 */
1f7977c1 2738int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2739{
4a35bd41 2740 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 2741 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 2742 struct nfs4_closedata *calldata;
b39e625b
TM		 2743 struct nfs4_state_owner *sp = state->owner;
2744 struct rpc_task *task;
5138fde0
TM		 2745 struct rpc_message msg = {
2746 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2747 .rpc_cred = state->owner->so_cred,
2748 };
c970aa85
TM		 2749 struct rpc_task_setup task_setup_data = {
2750 .rpc_client = server->client,
5138fde0 2751 .rpc_message = &msg,
c970aa85 2752 .callback_ops = &nfs4_close_ops,
101070ca 2753 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2754 .flags = RPC_TASK_ASYNC,
2755 };
9512135d 2756 int status = -ENOMEM;
1da177e4 2757
fa940720
WAA		 2758 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2759 &task_setup_data.rpc_client, &msg);
2760
8535b2be 2761 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2762 if (calldata == NULL)
9512135d 2763 goto out;
a9c92d6b 2764 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2765 calldata->inode = state->inode;
1da177e4 2766 calldata->state = state;
4a35bd41 2767 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 2768 /* Serialization for the sequence id */
63f5f796
TM		 2769 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2770 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 2771 if (IS_ERR(calldata->arg.seqid))
9512135d 2772 goto out_free_calldata;
dc0b027d 2773 calldata->arg.fmode = 0;
a65318bf 2774 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2775 calldata->res.fattr = &calldata->fattr;
c1d51931 2776 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2777 calldata->res.server = server;
fe08c546 2778 calldata->roc = nfs4_roc(state->inode);
643168c2 2779 nfs_sb_active(calldata->inode->i_sb);
9512135d 2780
1174dd1f
TM		 2781 msg.rpc_argp = &calldata->arg;
2782 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2783 task_setup_data.callback_data = calldata;
2784 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2785 if (IS_ERR(task))
2786 return PTR_ERR(task);
a49c3c77
TM		 2787 status = 0;
2788 if (wait)
2789 status = rpc_wait_for_completion_task(task);
b39e625b 2790 rpc_put_task(task);
a49c3c77 2791 return status;
9512135d
TM		 2792out_free_calldata:
2793 kfree(calldata);
2794out:
b39e625b
TM		 2795 nfs4_put_open_state(state);
2796 nfs4_put_state_owner(sp);
9512135d 2797 return status;
1da177e4
LT		 2798}
2799
2b484297 2800static struct inode *
5bc2afc2
TM		 2801nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2802 int open_flags, struct iattr *attr, int *opened)
1da177e4 2803{
1da177e4 2804 struct nfs4_state *state;
aa9c2669
DQ		 2805 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2806
2807 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2808
565277f6 2809 /* Protect against concurrent sillydeletes */
5bc2afc2 2810 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2811
2812 nfs4_label_release_security(label);
2813
f46e0bd3
TM		 2814 if (IS_ERR(state))
2815 return ERR_CAST(state);
275bb307 2816 return state->inode;
1da177e4
LT		 2817}
2818
1185a552 2819static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2820{
2821 if (ctx->state == NULL)
2822 return;
2823 if (is_sync)
643168c2 2824 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2825 else
643168c2 2826 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2827}
1da177e4 2828
b944dba3
TM		 2829#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2830#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2831#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2832
1da177e4
LT		 2833static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2834{
43652ad5
BH		 2835 struct nfs4_server_caps_arg args = {
2836 .fhandle = fhandle,
2837 };
1da177e4
LT		 2838 struct nfs4_server_caps_res res = {};
2839 struct rpc_message msg = {
2840 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2841 .rpc_argp = &args,
1da177e4
LT		 2842 .rpc_resp = &res,
2843 };
2844 int status;
2845
7c513058 2846 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2847 if (status == 0) {
b944dba3
TM		 2848 /* Sanity check the server answers */
2849 switch (server->nfs_client->cl_minorversion) {
2850 case 0:
2851 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2852 res.attr_bitmask[2] = 0;
2853 break;
2854 case 1:
2855 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2856 break;
2857 case 2:
2858 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2859 }
1da177e4 2860 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2861 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2862 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2863 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2864 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2865 NFS_CAP_CTIME|NFS_CAP_MTIME|
2866 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2867 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2868 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2869 server->caps |= NFS_CAP_ACLS;
2870 if (res.has_links != 0)
2871 server->caps |= NFS_CAP_HARDLINKS;
2872 if (res.has_symlinks != 0)
2873 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2874 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2875 server->caps |= NFS_CAP_FILEID;
2876 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2877 server->caps |= NFS_CAP_MODE;
2878 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2879 server->caps |= NFS_CAP_NLINK;
2880 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2881 server->caps |= NFS_CAP_OWNER;
2882 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2883 server->caps |= NFS_CAP_OWNER_GROUP;
2884 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2885 server->caps |= NFS_CAP_ATIME;
2886 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2887 server->caps |= NFS_CAP_CTIME;
2888 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2889 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2890#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2891 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2892 server->caps |= NFS_CAP_SECURITY_LABEL;
2893#endif
2894 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2895 sizeof(server->attr_bitmask));
b944dba3 2896 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2897
a65318bf
TM		 2898 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2899 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2900 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2901 server->cache_consistency_bitmask[2] = 0;
1da177e4 2902 server->acl_bitmask = res.acl_bitmask;
264e6351 2903 server->fh_expire_type = res.fh_expire_type;
1da177e4 2904 }
cccef3b9 2905
1da177e4
LT		 2906 return status;
2907}
2908
55a97593 2909int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2910{
2911 struct nfs4_exception exception = { };
2912 int err;
2913 do {
2914 err = nfs4_handle_exception(server,
2915 _nfs4_server_capabilities(server, fhandle),
2916 &exception);
2917 } while (exception.retry);
2918 return err;
2919}
2920
2921static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2922 struct nfs_fsinfo *info)
2923{
aa9c2669 2924 u32 bitmask[3];
1da177e4 2925 struct nfs4_lookup_root_arg args = {
aa9c2669 2926 .bitmask = bitmask,
1da177e4
LT		 2927 };
2928 struct nfs4_lookup_res res = {
2929 .server = server,
0e574af1 2930 .fattr = info->fattr,
1da177e4
LT		 2931 .fh = fhandle,
2932 };
2933 struct rpc_message msg = {
2934 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2935 .rpc_argp = &args,
2936 .rpc_resp = &res,
2937 };
008f55d0 2938
aa9c2669
DQ		 2939 bitmask[0] = nfs4_fattr_bitmap[0];
2940 bitmask[1] = nfs4_fattr_bitmap[1];
2941 /*
2942 * Process the label in the upcoming getfattr
2943 */
2944 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2945
0e574af1 2946 nfs_fattr_init(info->fattr);
7c513058 2947 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2948}
2949
2950static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2951 struct nfs_fsinfo *info)
2952{
2953 struct nfs4_exception exception = { };
2954 int err;
2955 do {
fb8a5ba8 2956 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2957 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2958 switch (err) {
2959 case 0:
2960 case -NFS4ERR_WRONGSEC:
05e9cfb4 2961 goto out;
fb8a5ba8
BS		 2962 default:
2963 err = nfs4_handle_exception(server, err, &exception);
2964 }
1da177e4 2965 } while (exception.retry);
05e9cfb4 2966out:
1da177e4
LT		 2967 return err;
2968}
2969
8f70e95f
BS		 2970static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2971 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2972{
c2190661
TM		 2973 struct rpc_auth_create_args auth_args = {
2974 .pseudoflavor = flavor,
2975 };
8f70e95f
BS		 2976 struct rpc_auth *auth;
2977 int ret;
2978
c2190661 2979 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 2980 if (IS_ERR(auth)) {
75bc8821 2981 ret = -EACCES;
8f70e95f
BS		 2982 goto out;
2983 }
2984 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2985out:
2986 return ret;
2987}
2988
9a744ba3
CL		 2989/*
2990 * Retry pseudoroot lookup with various security flavors. We do this when:
2991 *
2992 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2993 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2994 *
2995 * Returns zero on success, or a negative NFS4ERR value, or a
2996 * negative errno value.
2997 */
801a16dc 2998static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2999 struct nfs_fsinfo *info)
1da177e4 3000{
9a744ba3
CL		 3001 /* Per 3530bis 15.33.5 */
3002 static const rpc_authflavor_t flav_array[] = {
3003 RPC_AUTH_GSS_KRB5P,
3004 RPC_AUTH_GSS_KRB5I,
3005 RPC_AUTH_GSS_KRB5,
c4eafe11 3006 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3007 RPC_AUTH_NULL,
3008 };
3009 int status = -EPERM;
3010 size_t i;
6a1a1e34 3011
4d4b69dd
WAA		 3012 if (server->auth_info.flavor_len > 0) {
3013 /* try each flavor specified by user */
3014 for (i = 0; i < server->auth_info.flavor_len; i++) {
3015 status = nfs4_lookup_root_sec(server, fhandle, info,
3016 server->auth_info.flavors[i]);
3017 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3018 continue;
3019 break;
3020 }
3021 } else {
3022 /* no flavors specified by user, try default list */
3023 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3024 status = nfs4_lookup_root_sec(server, fhandle, info,
3025 flav_array[i]);
3026 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3027 continue;
3028 break;
3029 }
8f70e95f 3030 }
9a744ba3 3031
fb8a5ba8
BS		 3032 /*
3033 * -EACCESS could mean that the user doesn't have correct permissions
3034 * to access the mount. It could also mean that we tried to mount
3035 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3036 * existing mount programs don't handle -EACCES very well so it should
3037 * be mapped to -EPERM instead.
3038 */
3039 if (status == -EACCES)
3040 status = -EPERM;
801a16dc
BS		 3041 return status;
3042}
3043
2ed4b95b
CL		 3044static int nfs4_do_find_root_sec(struct nfs_server *server,
3045 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3046{
3047 int mv = server->nfs_client->cl_minorversion;
3048 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3049}
3050
3051/**
3052 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3053 * @server: initialized nfs_server handle
3054 * @fhandle: we fill in the pseudo-fs root file handle
3055 * @info: we fill in an FSINFO struct
5e6b1990 3056 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3057 *
3058 * Returns zero on success, or a negative errno.
801a16dc 3059 */
3028eb2b 3060int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3061 struct nfs_fsinfo *info,
3062 bool auth_probe)
801a16dc 3063{
2ed4b95b
CL		 3064 int status;
3065
5e6b1990
TM		 3066 switch (auth_probe) {
3067 case false:
3068 status = nfs4_lookup_root(server, fhandle, info);
3069 if (status != -NFS4ERR_WRONGSEC)
3070 break;
5e6b1990 3071 default:
2ed4b95b 3072 status = nfs4_do_find_root_sec(server, fhandle, info);
5e6b1990 3073 }
2ed4b95b 3074
1da177e4
LT		 3075 if (status == 0)
3076 status = nfs4_server_capabilities(server, fhandle);
3077 if (status == 0)
3078 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3079
c12e87f4 3080 return nfs4_map_errors(status);
1da177e4
LT		 3081}
3082
bae36241
BS		 3083static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3084 struct nfs_fsinfo *info)
3085{
3086 int error;
3087 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3088 struct nfs4_label *label = NULL;
bae36241
BS		 3089
3090 error = nfs4_server_capabilities(server, mntfh);
3091 if (error < 0) {
3092 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3093 return error;
3094 }
3095
14c43f76
DQ		 3096 label = nfs4_label_alloc(server, GFP_KERNEL);
3097 if (IS_ERR(label))
3098 return PTR_ERR(label);
3099
1775fd3e 3100 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3101 if (error < 0) {
3102 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3103 goto err_free_label;
bae36241
BS		 3104 }
3105
3106 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3107 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3108 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3109
14c43f76
DQ		 3110err_free_label:
3111 nfs4_label_free(label);
3112
bae36241
BS		 3113 return error;
3114}
3115
6b97fd3d
MN		 3116/*
3117 * Get locations and (maybe) other attributes of a referral.
3118 * Note that we'll actually follow the referral later when
3119 * we detect fsid mismatch in inode revalidation
3120 */
f05d147f
BS		 3121static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3122 const struct qstr *name, struct nfs_fattr *fattr,
3123 struct nfs_fh *fhandle)
6b97fd3d
MN		 3124{
3125 int status = -ENOMEM;
3126 struct page *page = NULL;
3127 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3128
3129 page = alloc_page(GFP_KERNEL);
3130 if (page == NULL)
3131 goto out;
3132 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3133 if (locations == NULL)
3134 goto out;
3135
f05d147f 3136 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3137 if (status != 0)
3138 goto out;
519ae255
CL		 3139
3140 /*
3141 * If the fsid didn't change, this is a migration event, not a
3142 * referral. Cause us to drop into the exception handler, which
3143 * will kick off migration recovery.
3144 */
6b97fd3d 3145 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3146 dprintk("%s: server did not return a different fsid for"
3147 " a referral at %s\n", __func__, name->name);
519ae255 3148 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3149 goto out;
3150 }
533eb461
AA		 3151 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3152 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3153
533eb461 3154 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3155 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3156 memset(fhandle, 0, sizeof(struct nfs_fh));
3157out:
3158 if (page)
3159 __free_page(page);
5d7ca35a 3160 kfree(locations);
6b97fd3d
MN		 3161 return status;
3162}
3163
1775fd3e
DQ		 3164static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3165 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3166{
3167 struct nfs4_getattr_arg args = {
3168 .fh = fhandle,
3169 .bitmask = server->attr_bitmask,
3170 };
3171 struct nfs4_getattr_res res = {
3172 .fattr = fattr,
1775fd3e 3173 .label = label,
1da177e4
LT		 3174 .server = server,
3175 };
3176 struct rpc_message msg = {
3177 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3178 .rpc_argp = &args,
3179 .rpc_resp = &res,
3180 };
aa9c2669
DQ		 3181
3182 args.bitmask = nfs4_bitmask(server, label);
3183
0e574af1 3184 nfs_fattr_init(fattr);
7c513058 3185 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3186}
3187
1775fd3e
DQ		 3188static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3189 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3190{
3191 struct nfs4_exception exception = { };
3192 int err;
3193 do {
b5f875a9
TM		 3194 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3195 trace_nfs4_getattr(server, fhandle, fattr, err);
3196 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3197 &exception);
3198 } while (exception.retry);
3199 return err;
3200}
3201
3202/*
3203 * The file is not closed if it is opened due to the a request to change
3204 * the size of the file. The open call will not be needed once the
3205 * VFS layer lookup-intents are implemented.
3206 *
3207 * Close is called when the inode is destroyed.
3208 * If we haven't opened the file for O_WRONLY, we
3209 * need to in the size_change case to obtain a stateid.
3210 *
3211 * Got race?
3212 * Because OPEN is always done by name in nfsv4, it is
3213 * possible that we opened a different file by the same
3214 * name. We can recognize this race condition, but we
3215 * can't do anything about it besides returning an error.
3216 *
3217 * This will be fixed with VFS changes (lookup-intent).
3218 */
3219static int
3220nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3221 struct iattr *sattr)
3222{
08e9eac4 3223 struct inode *inode = dentry->d_inode;
659bfcd6 3224 struct rpc_cred *cred = NULL;
d530838b 3225 struct nfs4_state *state = NULL;
14c43f76 3226 struct nfs4_label *label = NULL;
1da177e4
LT		 3227 int status;
3228
88ac815c
PT		 3229 if (pnfs_ld_layoutret_on_setattr(inode) &&
3230 sattr->ia_valid & ATTR_SIZE &&
3231 sattr->ia_size < i_size_read(inode))
24028672 3232 pnfs_commit_and_return_layout(inode);
8a1636c4 3233
0e574af1 3234 nfs_fattr_init(fattr);
1da177e4 3235
2669940d
AA		 3236 /* Deal with open(O_TRUNC) */
3237 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3238 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3239
3240 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3241 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3242 return 0;
3243
d530838b 3244 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3245 if (sattr->ia_valid & ATTR_FILE) {
3246 struct nfs_open_context *ctx;
3247
3248 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3249 if (ctx) {
3250 cred = ctx->cred;
3251 state = ctx->state;
3252 }
659bfcd6 3253 }
08e9eac4 3254
14c43f76
DQ		 3255 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3256 if (IS_ERR(label))
3257 return PTR_ERR(label);
3258
3259 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3260 if (status == 0) {
65e4308d 3261 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 3262 nfs_setsecurity(inode, fattr, label);
3263 }
14c43f76 3264 nfs4_label_free(label);
1da177e4
LT		 3265 return status;
3266}
3267
0c2e53f1
TM		 3268static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3269 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3270 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3271{
0c2e53f1 3272 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3273 int status;
3274 struct nfs4_lookup_arg args = {
3275 .bitmask = server->attr_bitmask,
0c2e53f1 3276 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3277 .name = name,
3278 };
3279 struct nfs4_lookup_res res = {
3280 .server = server,
3281 .fattr = fattr,
aa9c2669 3282 .label = label,
2b3de441
DH		 3283 .fh = fhandle,
3284 };
3285 struct rpc_message msg = {
3286 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3287 .rpc_argp = &args,
3288 .rpc_resp = &res,
3289 };
3290
aa9c2669
DQ		 3291 args.bitmask = nfs4_bitmask(server, label);
3292
2b3de441
DH		 3293 nfs_fattr_init(fattr);
3294
1da177e4 3295 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3296 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3297 dprintk("NFS reply lookup: %d\n", status);
3298 return status;
3299}
3300
72de53ec 3301static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3302{
7ebb9315 3303 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3304 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3305 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3306 fattr->nlink = 2;
3307}
3308
72de53ec
BS		 3309static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3310 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3311 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3312{
3313 struct nfs4_exception exception = { };
72de53ec 3314 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3315 int err;
3316 do {
1775fd3e 3317 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3318 trace_nfs4_lookup(dir, name, err);
72de53ec 3319 switch (err) {
08ef7bd3 3320 case -NFS4ERR_BADNAME:
72de53ec
BS		 3321 err = -ENOENT;
3322 goto out;
0c2e53f1 3323 case -NFS4ERR_MOVED:
f05d147f 3324 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3325 goto out;
0c2e53f1 3326 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3327 err = -EPERM;
3328 if (client != *clnt)
3329 goto out;
66b06860 3330 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3331 if (IS_ERR(client))
3332 return PTR_ERR(client);
3333
3334 exception.retry = 1;
3335 break;
3336 default:
3337 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3338 }
1da177e4 3339 } while (exception.retry);
72de53ec
BS		 3340
3341out:
3342 if (err == 0)
3343 *clnt = client;
3344 else if (client != *clnt)
3345 rpc_shutdown_client(client);
3346
1da177e4
LT		 3347 return err;
3348}
3349
80a16b21 3350static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3351 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3352 struct nfs4_label *label)
72de53ec
BS		 3353{
3354 int status;
3355 struct rpc_clnt *client = NFS_CLIENT(dir);
3356
1775fd3e 3357 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3358 if (client != NFS_CLIENT(dir)) {
3359 rpc_shutdown_client(client);
3360 nfs_fixup_secinfo_attributes(fattr);
3361 }
3362 return status;
3363}
3364
f05d147f
BS		 3365struct rpc_clnt *
3366nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3367 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3368{
b72888cb 3369 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3370 int status;
f05d147f 3371
1775fd3e 3372 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3373 if (status < 0)
f05d147f 3374 return ERR_PTR(status);
b72888cb 3375 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3376}
3377
1da177e4
LT		 3378static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3379{
76b32999 3380 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3381 struct nfs4_accessargs args = {
3382 .fh = NFS_FH(inode),
a4980e78 3383 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3384 };
3385 struct nfs4_accessres res = {
3386 .server = server,
1da177e4 3387 };
1da177e4
LT		 3388 struct rpc_message msg = {
3389 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3390 .rpc_argp = &args,
3391 .rpc_resp = &res,
3392 .rpc_cred = entry->cred,
3393 };
3394 int mode = entry->mask;
aa9c2669 3395 int status = 0;
1da177e4
LT		 3396
3397 /*
3398 * Determine which access bits we want to ask for...
3399 */
3400 if (mode & MAY_READ)
3401 args.access |= NFS4_ACCESS_READ;
3402 if (S_ISDIR(inode->i_mode)) {
3403 if (mode & MAY_WRITE)
3404 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3405 if (mode & MAY_EXEC)
3406 args.access |= NFS4_ACCESS_LOOKUP;
3407 } else {
3408 if (mode & MAY_WRITE)
3409 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3410 if (mode & MAY_EXEC)
3411 args.access |= NFS4_ACCESS_EXECUTE;
3412 }
c407d41a
TM		 3413
3414 res.fattr = nfs_alloc_fattr();
3415 if (res.fattr == NULL)
3416 return -ENOMEM;
3417
7c513058 3418 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3419 if (!status) {
6168f62c 3420 nfs_access_set_mask(entry, res.access);
c407d41a 3421 nfs_refresh_inode(inode, res.fattr);
1da177e4 3422 }
c407d41a 3423 nfs_free_fattr(res.fattr);
1da177e4
LT		 3424 return status;
3425}
3426
3427static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3428{
3429 struct nfs4_exception exception = { };
3430 int err;
3431 do {
c1578b76
TM		 3432 err = _nfs4_proc_access(inode, entry);
3433 trace_nfs4_access(inode, err);
3434 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3435 &exception);
3436 } while (exception.retry);
3437 return err;
3438}
3439
3440/*
3441 * TODO: For the time being, we don't try to get any attributes
3442 * along with any of the zero-copy operations READ, READDIR,
3443 * READLINK, WRITE.
3444 *
3445 * In the case of the first three, we want to put the GETATTR
3446 * after the read-type operation -- this is because it is hard
3447 * to predict the length of a GETATTR response in v4, and thus
3448 * align the READ data correctly. This means that the GETATTR
3449 * may end up partially falling into the page cache, and we should
3450 * shift it into the 'tail' of the xdr_buf before processing.
3451 * To do this efficiently, we need to know the total length
3452 * of data received, which doesn't seem to be available outside
3453 * of the RPC layer.
3454 *
3455 * In the case of WRITE, we also want to put the GETATTR after
3456 * the operation -- in this case because we want to make sure
140150db 3457 * we get the post-operation mtime and size.
1da177e4
LT		 3458 *
3459 * Both of these changes to the XDR layer would in fact be quite
3460 * minor, but I decided to leave them for a subsequent patch.
3461 */
3462static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3463 unsigned int pgbase, unsigned int pglen)
3464{
3465 struct nfs4_readlink args = {
3466 .fh = NFS_FH(inode),
3467 .pgbase = pgbase,
3468 .pglen = pglen,
3469 .pages = &page,
3470 };
f50c7000 3471 struct nfs4_readlink_res res;
1da177e4
LT		 3472 struct rpc_message msg = {
3473 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3474 .rpc_argp = &args,
f50c7000 3475 .rpc_resp = &res,
1da177e4
LT		 3476 };
3477
7c513058 3478 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3479}
3480
3481static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3482 unsigned int pgbase, unsigned int pglen)
3483{
3484 struct nfs4_exception exception = { };
3485 int err;
3486 do {
c1578b76
TM		 3487 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3488 trace_nfs4_readlink(inode, err);
3489 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3490 &exception);
3491 } while (exception.retry);
3492 return err;
3493}
3494
1da177e4 3495/*
8867fe58 3496 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3497 */
1da177e4
LT		 3498static int
3499nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3500 int flags)
1da177e4 3501{
aa9c2669 3502 struct nfs4_label l, *ilabel = NULL;
8867fe58 3503 struct nfs_open_context *ctx;
1da177e4 3504 struct nfs4_state *state;
5bc2afc2 3505 int opened = 0;
1da177e4
LT		 3506 int status = 0;
3507
8867fe58
MS		 3508 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3509 if (IS_ERR(ctx))
3510 return PTR_ERR(ctx);
3511
aa9c2669
DQ		 3512 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3513
a8a5da99 3514 sattr->ia_mode &= ~current_umask();
5bc2afc2 3515 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3516 if (IS_ERR(state)) {
3517 status = PTR_ERR(state);
c0204fd2 3518 goto out;
1da177e4 3519 }
1da177e4 3520out:
aa9c2669 3521 nfs4_label_release_security(ilabel);
8867fe58 3522 put_nfs_open_context(ctx);
1da177e4
LT		 3523 return status;
3524}
3525
3526static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3527{
16e42959 3528 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3529 struct nfs_removeargs args = {
1da177e4 3530 .fh = NFS_FH(dir),
26fe5750 3531 .name = *name,
16e42959 3532 };
4fdc17b2 3533 struct nfs_removeres res = {
16e42959 3534 .server = server,
1da177e4 3535 };
1da177e4 3536 struct rpc_message msg = {
4fdc17b2
TM		 3537 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3538 .rpc_argp = &args,
3539 .rpc_resp = &res,
1da177e4 3540 };
778d2817 3541 int status;
1da177e4 3542
7c513058 3543 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3544 if (status == 0)
16e42959 3545 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3546 return status;
3547}
3548
3549static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3550{
3551 struct nfs4_exception exception = { };
3552 int err;
3553 do {
078ea3df
TM		 3554 err = _nfs4_proc_remove(dir, name);
3555 trace_nfs4_remove(dir, name, err);
3556 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3557 &exception);
3558 } while (exception.retry);
3559 return err;
3560}
3561
e4eff1a6 3562static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3563{
e4eff1a6
TM		 3564 struct nfs_server *server = NFS_SERVER(dir);
3565 struct nfs_removeargs *args = msg->rpc_argp;
3566 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3567
e4eff1a6 3568 res->server = server;
1da177e4 3569 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3570 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3571
3572 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3573}
3574
34e137cc
BS		 3575static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3576{
d9afbd1b
TM		 3577 nfs4_setup_sequence(NFS_SERVER(data->dir),
3578 &data->args.seq_args,
3579 &data->res.seq_res,
3580 task);
1da177e4
LT		 3581}
3582
e4eff1a6 3583static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3584{
078ea3df
TM		 3585 struct nfs_unlinkdata *data = task->tk_calldata;
3586 struct nfs_removeres *res = &data->res;
e4eff1a6 3587
14516c3a
TM		 3588 if (!nfs4_sequence_done(task, &res->seq_res))
3589 return 0;
8478eaa1
N		 3590 if (nfs4_async_handle_error(task, res->server, NULL,
3591 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3592 return 0;
3593 update_changeattr(dir, &res->cinfo);
e4eff1a6 3594 return 1;
1da177e4
LT		 3595}
3596
d3d4152a
JL		 3597static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3598{
3599 struct nfs_server *server = NFS_SERVER(dir);
3600 struct nfs_renameargs *arg = msg->rpc_argp;
3601 struct nfs_renameres *res = msg->rpc_resp;
3602
3603 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3604 res->server = server;
a9c92d6b 3605 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3606}
3607
c6bfa1a1
BS		 3608static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3609{
d9afbd1b
TM		 3610 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3611 &data->args.seq_args,
3612 &data->res.seq_res,
3613 task);
d3d4152a
JL		 3614}
3615
3616static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3617 struct inode *new_dir)
3618{
fbc6f7c2
TM		 3619 struct nfs_renamedata *data = task->tk_calldata;
3620 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3621
3622 if (!nfs4_sequence_done(task, &res->seq_res))
3623 return 0;
8478eaa1 3624 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3625 return 0;
3626
3627 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3628 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3629 return 1;
3630}
3631
1da177e4
LT		 3632static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3633{
91ba2eee 3634 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3635 struct nfs4_link_arg arg = {
3636 .fh = NFS_FH(inode),
3637 .dir_fh = NFS_FH(dir),
3638 .name = name,
91ba2eee
TM		 3639 .bitmask = server->attr_bitmask,
3640 };
91ba2eee
TM		 3641 struct nfs4_link_res res = {
3642 .server = server,
1775fd3e 3643 .label = NULL,
1da177e4 3644 };
1da177e4
LT		 3645 struct rpc_message msg = {
3646 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3647 .rpc_argp = &arg,
91ba2eee 3648 .rpc_resp = &res,
1da177e4 3649 };
136f2627
TM		 3650 int status = -ENOMEM;
3651
3652 res.fattr = nfs_alloc_fattr();
778d2817 3653 if (res.fattr == NULL)
136f2627 3654 goto out;
1da177e4 3655
14c43f76
DQ		 3656 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3657 if (IS_ERR(res.label)) {
3658 status = PTR_ERR(res.label);
3659 goto out;
3660 }
aa9c2669 3661 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3662
7c513058 3663 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3664 if (!status) {
3665 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3666 status = nfs_post_op_update_inode(inode, res.fattr);
3667 if (!status)
3668 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3669 }
14c43f76
DQ		 3670
3671
3672 nfs4_label_free(res.label);
3673
136f2627 3674out:
136f2627 3675 nfs_free_fattr(res.fattr);
1da177e4
LT		 3676 return status;
3677}
3678
3679static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3680{
3681 struct nfs4_exception exception = { };
3682 int err;
3683 do {
3684 err = nfs4_handle_exception(NFS_SERVER(inode),
3685 _nfs4_proc_link(inode, dir, name),
3686 &exception);
3687 } while (exception.retry);
3688 return err;
3689}
3690
57dc9a57
TM		 3691struct nfs4_createdata {
3692 struct rpc_message msg;
3693 struct nfs4_create_arg arg;
3694 struct nfs4_create_res res;
3695 struct nfs_fh fh;
3696 struct nfs_fattr fattr;
1775fd3e 3697 struct nfs4_label *label;
57dc9a57
TM		 3698};
3699
3700static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3701 struct qstr *name, struct iattr *sattr, u32 ftype)
3702{
3703 struct nfs4_createdata *data;
3704
3705 data = kzalloc(sizeof(*data), GFP_KERNEL);
3706 if (data != NULL) {
3707 struct nfs_server *server = NFS_SERVER(dir);
3708
14c43f76
DQ		 3709 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3710 if (IS_ERR(data->label))
3711 goto out_free;
3712
57dc9a57
TM		 3713 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3714 data->msg.rpc_argp = &data->arg;
3715 data->msg.rpc_resp = &data->res;
3716 data->arg.dir_fh = NFS_FH(dir);
3717 data->arg.server = server;
3718 data->arg.name = name;
3719 data->arg.attrs = sattr;
3720 data->arg.ftype = ftype;
aa9c2669 3721 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3722 data->res.server = server;
3723 data->res.fh = &data->fh;
3724 data->res.fattr = &data->fattr;
1775fd3e 3725 data->res.label = data->label;
57dc9a57 3726 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3727 }
3728 return data;
14c43f76
DQ		 3729out_free:
3730 kfree(data);
3731 return NULL;
57dc9a57
TM		 3732}
3733
3734static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3735{
7c513058 3736 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3737 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3738 if (status == 0) {
3739 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3740 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3741 }
3742 return status;
3743}
3744
3745static void nfs4_free_createdata(struct nfs4_createdata *data)
3746{
14c43f76 3747 nfs4_label_free(data->label);
57dc9a57
TM		 3748 kfree(data);
3749}
3750
4f390c15 3751static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3752 struct page *page, unsigned int len, struct iattr *sattr,
3753 struct nfs4_label *label)
1da177e4 3754{
57dc9a57
TM		 3755 struct nfs4_createdata *data;
3756 int status = -ENAMETOOLONG;
1da177e4 3757
94a6d753 3758 if (len > NFS4_MAXPATHLEN)
57dc9a57 3759 goto out;
4f390c15 3760
57dc9a57
TM		 3761 status = -ENOMEM;
3762 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3763 if (data == NULL)
3764 goto out;
3765
3766 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3767 data->arg.u.symlink.pages = &page;
3768 data->arg.u.symlink.len = len;
1775fd3e 3769 data->arg.label = label;
1da177e4 3770
57dc9a57
TM		 3771 status = nfs4_do_create(dir, dentry, data);
3772
3773 nfs4_free_createdata(data);
3774out:
1da177e4
LT		 3775 return status;
3776}
3777
4f390c15 3778static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3779 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3780{
3781 struct nfs4_exception exception = { };
aa9c2669 3782 struct nfs4_label l, *label = NULL;
1da177e4 3783 int err;
aa9c2669
DQ		 3784
3785 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3786
1da177e4 3787 do {
078ea3df
TM		 3788 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3789 trace_nfs4_symlink(dir, &dentry->d_name, err);
3790 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3791 &exception);
3792 } while (exception.retry);
aa9c2669
DQ		 3793
3794 nfs4_label_release_security(label);
1da177e4
LT		 3795 return err;
3796}
3797
3798static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3799 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3800{
57dc9a57
TM		 3801 struct nfs4_createdata *data;
3802 int status = -ENOMEM;
1da177e4 3803
57dc9a57
TM		 3804 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3805 if (data == NULL)
3806 goto out;
3807
1775fd3e 3808 data->arg.label = label;
57dc9a57
TM		 3809 status = nfs4_do_create(dir, dentry, data);
3810
3811 nfs4_free_createdata(data);
3812out:
1da177e4
LT		 3813 return status;
3814}
3815
3816static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3817 struct iattr *sattr)
3818{
3819 struct nfs4_exception exception = { };
aa9c2669 3820 struct nfs4_label l, *label = NULL;
1da177e4 3821 int err;
a8a5da99 3822
aa9c2669
DQ		 3823 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3824
a8a5da99 3825 sattr->ia_mode &= ~current_umask();
1da177e4 3826 do {
078ea3df
TM		 3827 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3828 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3829 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3830 &exception);
3831 } while (exception.retry);
aa9c2669
DQ		 3832 nfs4_label_release_security(label);
3833
1da177e4
LT		 3834 return err;
3835}
3836
3837static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3838 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3839{
3840 struct inode *dir = dentry->d_inode;
3841 struct nfs4_readdir_arg args = {
3842 .fh = NFS_FH(dir),
56e4ebf8 3843 .pages = pages,
1da177e4
LT		 3844 .pgbase = 0,
3845 .count = count,
96d25e53 3846 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3847 .plus = plus,
1da177e4
LT		 3848 };
3849 struct nfs4_readdir_res res;
3850 struct rpc_message msg = {
3851 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3852 .rpc_argp = &args,
3853 .rpc_resp = &res,
3854 .rpc_cred = cred,
3855 };
3856 int status;
3857
6de1472f
AV		 3858 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3859 dentry,
eadf4598 3860 (unsigned long long)cookie);
c3f52af3 3861 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3862 res.pgbase = args.pgbase;
7c513058 3863 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3864 if (status >= 0) {
c3f52af3 3865 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3866 status += args.pgbase;
3867 }
c4812998
TM		 3868
3869 nfs_invalidate_atime(dir);
3870
3110ff80 3871 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3872 return status;
3873}
3874
3875static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3876 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3877{
3878 struct nfs4_exception exception = { };
3879 int err;
3880 do {
c1578b76
TM		 3881 err = _nfs4_proc_readdir(dentry, cred, cookie,
3882 pages, count, plus);
3883 trace_nfs4_readdir(dentry->d_inode, err);
3884 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3885 &exception);
3886 } while (exception.retry);
3887 return err;
3888}
3889
3890static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3891 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3892{
57dc9a57
TM		 3893 struct nfs4_createdata *data;
3894 int mode = sattr->ia_mode;
3895 int status = -ENOMEM;
1da177e4 3896
57dc9a57
TM		 3897 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3898 if (data == NULL)
3899 goto out;
3900
1da177e4 3901 if (S_ISFIFO(mode))
57dc9a57 3902 data->arg.ftype = NF4FIFO;
1da177e4 3903 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3904 data->arg.ftype = NF4BLK;
3905 data->arg.u.device.specdata1 = MAJOR(rdev);
3906 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3907 }
3908 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3909 data->arg.ftype = NF4CHR;
3910 data->arg.u.device.specdata1 = MAJOR(rdev);
3911 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3912 } else if (!S_ISSOCK(mode)) {
3913 status = -EINVAL;
3914 goto out_free;
1da177e4 3915 }
1775fd3e 3916
aa9c2669 3917 data->arg.label = label;
57dc9a57 3918 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3919out_free:
57dc9a57
TM		 3920 nfs4_free_createdata(data);
3921out:
1da177e4
LT		 3922 return status;
3923}
3924
3925static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3926 struct iattr *sattr, dev_t rdev)
3927{
3928 struct nfs4_exception exception = { };
aa9c2669 3929 struct nfs4_label l, *label = NULL;
1da177e4 3930 int err;
a8a5da99 3931
aa9c2669
DQ		 3932 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3933
a8a5da99 3934 sattr->ia_mode &= ~current_umask();
1da177e4 3935 do {
078ea3df
TM		 3936 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3937 trace_nfs4_mknod(dir, &dentry->d_name, err);
3938 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3939 &exception);
3940 } while (exception.retry);
aa9c2669
DQ		 3941
3942 nfs4_label_release_security(label);
3943
1da177e4
LT		 3944 return err;
3945}
3946
3947static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3948 struct nfs_fsstat *fsstat)
3949{
3950 struct nfs4_statfs_arg args = {
3951 .fh = fhandle,
3952 .bitmask = server->attr_bitmask,
3953 };
24ad148a
BH		 3954 struct nfs4_statfs_res res = {
3955 .fsstat = fsstat,
3956 };
1da177e4
LT		 3957 struct rpc_message msg = {
3958 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3959 .rpc_argp = &args,
24ad148a 3960 .rpc_resp = &res,
1da177e4
LT		 3961 };
3962
0e574af1 3963 nfs_fattr_init(fsstat->fattr);
7c513058 3964 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3965}
3966
3967static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3968{
3969 struct nfs4_exception exception = { };
3970 int err;
3971 do {
3972 err = nfs4_handle_exception(server,
3973 _nfs4_proc_statfs(server, fhandle, fsstat),
3974 &exception);
3975 } while (exception.retry);
3976 return err;
3977}
3978
3979static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3980 struct nfs_fsinfo *fsinfo)
3981{
3982 struct nfs4_fsinfo_arg args = {
3983 .fh = fhandle,
3984 .bitmask = server->attr_bitmask,
3985 };
3dda5e43
BH		 3986 struct nfs4_fsinfo_res res = {
3987 .fsinfo = fsinfo,
3988 };
1da177e4
LT		 3989 struct rpc_message msg = {
3990 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3991 .rpc_argp = &args,
3dda5e43 3992 .rpc_resp = &res,
1da177e4
LT		 3993 };
3994
7c513058 3995 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3996}
3997
3998static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3999{
4000 struct nfs4_exception exception = { };
83ca7f5a 4001 unsigned long now = jiffies;
1da177e4
LT		 4002 int err;
4003
4004 do {
83ca7f5a 4005 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4006 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4007 if (err == 0) {
4008 struct nfs_client *clp = server->nfs_client;
4009
4010 spin_lock(&clp->cl_lock);
4011 clp->cl_lease_time = fsinfo->lease_time * HZ;
4012 clp->cl_last_renewal = now;
4013 spin_unlock(&clp->cl_lock);
4014 break;
4015 }
4016 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4017 } while (exception.retry);
4018 return err;
4019}
4020
4021static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4022{
e38eb650
BS		 4023 int error;
4024
0e574af1 4025 nfs_fattr_init(fsinfo->fattr);
e38eb650 4026 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4027 if (error == 0) {
4028 /* block layout checks this! */
4029 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4030 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4031 }
e38eb650
BS		 4032
4033 return error;
1da177e4
LT		 4034}
4035
4036static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4037 struct nfs_pathconf *pathconf)
4038{
4039 struct nfs4_pathconf_arg args = {
4040 .fh = fhandle,
4041 .bitmask = server->attr_bitmask,
4042 };
d45b2989
BH		 4043 struct nfs4_pathconf_res res = {
4044 .pathconf = pathconf,
4045 };
1da177e4
LT		 4046 struct rpc_message msg = {
4047 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4048 .rpc_argp = &args,
d45b2989 4049 .rpc_resp = &res,
1da177e4
LT		 4050 };
4051
4052 /* None of the pathconf attributes are mandatory to implement */
4053 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4054 memset(pathconf, 0, sizeof(*pathconf));
4055 return 0;
4056 }
4057
0e574af1 4058 nfs_fattr_init(pathconf->fattr);
7c513058 4059 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4060}
4061
4062static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4063 struct nfs_pathconf *pathconf)
4064{
4065 struct nfs4_exception exception = { };
4066 int err;
4067
4068 do {
4069 err = nfs4_handle_exception(server,
4070 _nfs4_proc_pathconf(server, fhandle, pathconf),
4071 &exception);
4072 } while (exception.retry);
4073 return err;
4074}
4075
5521abfd 4076int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4077 const struct nfs_open_context *ctx,
4078 const struct nfs_lock_context *l_ctx,
4079 fmode_t fmode)
4080{
4081 const struct nfs_lockowner *lockowner = NULL;
4082
4083 if (l_ctx != NULL)
4084 lockowner = &l_ctx->lockowner;
5521abfd 4085 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4086}
4087EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4088
5521abfd
TM		 4089static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4090 const struct nfs_open_context *ctx,
4091 const struct nfs_lock_context *l_ctx,
4092 fmode_t fmode)
4093{
4094 nfs4_stateid current_stateid;
4095
e1253be0
TM		 4096 /* If the current stateid represents a lost lock, then exit */
4097 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4098 return true;
5521abfd
TM		 4099 return nfs4_stateid_match(stateid, &current_stateid);
4100}
4101
4102static bool nfs4_error_stateid_expired(int err)
4103{
4104 switch (err) {
4105 case -NFS4ERR_DELEG_REVOKED:
4106 case -NFS4ERR_ADMIN_REVOKED:
4107 case -NFS4ERR_BAD_STATEID:
4108 case -NFS4ERR_STALE_STATEID:
4109 case -NFS4ERR_OLD_STATEID:
4110 case -NFS4ERR_OPENMODE:
4111 case -NFS4ERR_EXPIRED:
4112 return true;
4113 }
4114 return false;
4115}
4116
d45f60c6 4117void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4118{
d45f60c6 4119 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4120}
4121
d45f60c6 4122static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4123{
d45f60c6 4124 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4125
d45f60c6
WAA		 4126 trace_nfs4_read(hdr, task->tk_status);
4127 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4128 hdr->args.context->state,
4129 NULL) == -EAGAIN) {
d00c5d43 4130 rpc_restart_call_prepare(task);
ec06c096 4131 return -EAGAIN;
1da177e4 4132 }
8850df99 4133
d45f60c6 4134 __nfs4_read_done_cb(hdr);
1da177e4 4135 if (task->tk_status > 0)
d45f60c6 4136 renew_lease(server, hdr->timestamp);
ec06c096 4137 return 0;
1da177e4
LT		 4138}
4139
5521abfd 4140static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4141 struct nfs_pgio_args *args)
5521abfd
TM		 4142{
4143
4144 if (!nfs4_error_stateid_expired(task->tk_status) ||
4145 nfs4_stateid_is_current(&args->stateid,
4146 args->context,
4147 args->lock_context,
4148 FMODE_READ))
4149 return false;
4150 rpc_restart_call_prepare(task);
4151 return true;
4152}
4153
d45f60c6 4154static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4155{
4156
4157 dprintk("--> %s\n", __func__);
4158
d45f60c6 4159 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4160 return -EAGAIN;
d45f60c6 4161 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4162 return -EAGAIN;
d45f60c6
WAA		 4163 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4164 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4165}
4166
d45f60c6
WAA		 4167static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4168 struct rpc_message *msg)
1da177e4 4169{
d45f60c6
WAA		 4170 hdr->timestamp = jiffies;
4171 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4172 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4173 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4174}
4175
d45f60c6
WAA		 4176static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4177 struct nfs_pgio_header *hdr)
ea7c3303 4178{
d45f60c6
WAA		 4179 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4180 &hdr->args.seq_args,
4181 &hdr->res.seq_res,
9b206149 4182 task))
ef1820f9 4183 return 0;
d45f60c6
WAA		 4184 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4185 hdr->args.lock_context,
4186 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4187 return -EIO;
d45f60c6 4188 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4189 return -EIO;
4190 return 0;
1da177e4
LT		 4191}
4192
d45f60c6
WAA		 4193static int nfs4_write_done_cb(struct rpc_task *task,
4194 struct nfs_pgio_header *hdr)
1da177e4 4195{
d45f60c6 4196 struct inode *inode = hdr->inode;
8478eaa1 4197
d45f60c6
WAA		 4198 trace_nfs4_write(hdr, task->tk_status);
4199 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4200 hdr->args.context->state,
4201 NULL) == -EAGAIN) {
d00c5d43 4202 rpc_restart_call_prepare(task);
788e7a89 4203 return -EAGAIN;
1da177e4 4204 }
4f9838c7 4205 if (task->tk_status >= 0) {
d45f60c6
WAA		 4206 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4207 nfs_post_op_update_inode_force_wcc(inode, &hdr->fattr);
4f9838c7 4208 }
788e7a89 4209 return 0;
1da177e4
LT		 4210}
4211
5521abfd 4212static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4213 struct nfs_pgio_args *args)
5521abfd
TM		 4214{
4215
4216 if (!nfs4_error_stateid_expired(task->tk_status) ||
4217 nfs4_stateid_is_current(&args->stateid,
4218 args->context,
4219 args->lock_context,
4220 FMODE_WRITE))
4221 return false;
4222 rpc_restart_call_prepare(task);
4223 return true;
4224}
4225
d45f60c6 4226static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4227{
d45f60c6 4228 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4229 return -EAGAIN;
d45f60c6 4230 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4231 return -EAGAIN;
d45f60c6
WAA		 4232 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4233 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4234}
4235
5a37f851 4236static
d45f60c6 4237bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4238{
5a37f851 4239 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4240 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4241 return false;
4242 /* Otherwise, request attributes if and only if we don't hold
4243 * a delegation
4244 */
011e2a7f 4245 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4246}
a69aef14 4247
d45f60c6
WAA		 4248static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4249 struct rpc_message *msg)
1da177e4 4250{
d45f60c6 4251 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4252
d45f60c6
WAA		 4253 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4254 hdr->args.bitmask = NULL;
4255 hdr->res.fattr = NULL;
7ffd1064 4256 } else
d45f60c6 4257 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4258
d45f60c6
WAA		 4259 if (!hdr->pgio_done_cb)
4260 hdr->pgio_done_cb = nfs4_write_done_cb;
4261 hdr->res.server = server;
4262 hdr->timestamp = jiffies;
1da177e4 4263
bdc7f021 4264 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4265 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4266}
4267
0b7c0153 4268static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4269{
d9afbd1b
TM		 4270 nfs4_setup_sequence(NFS_SERVER(data->inode),
4271 &data->args.seq_args,
4272 &data->res.seq_res,
4273 task);
1da177e4
LT		 4274}
4275
0b7c0153 4276static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4277{
1da177e4 4278 struct inode *inode = data->inode;
14516c3a 4279
cc668ab3 4280 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4281 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4282 NULL, NULL) == -EAGAIN) {
d00c5d43 4283 rpc_restart_call_prepare(task);
788e7a89 4284 return -EAGAIN;
1da177e4 4285 }
788e7a89 4286 return 0;
1da177e4
LT		 4287}
4288
0b7c0153 4289static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4290{
4291 if (!nfs4_sequence_done(task, &data->res.seq_res))
4292 return -EAGAIN;
0b7c0153 4293 return data->commit_done_cb(task, data);
5f452431
FI		 4294}
4295
0b7c0153 4296static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4297{
788e7a89 4298 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4299
0b7c0153
FI		 4300 if (data->commit_done_cb == NULL)
4301 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4302 data->res.server = server;
bdc7f021 4303 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4304 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4305}
4306
9bc4e3ca
CL		 4307struct nfs4_renewdata {
4308 struct nfs_client *client;
4309 unsigned long timestamp;
4310};
4311
1da177e4
LT		 4312/*
4313 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4314 * standalone procedure for queueing an asynchronous RENEW.
4315 */
9bc4e3ca 4316static void nfs4_renew_release(void *calldata)
dc96aef9 4317{
9bc4e3ca
CL		 4318 struct nfs4_renewdata *data = calldata;
4319 struct nfs_client *clp = data->client;
dc96aef9 4320
0851de06
AB		 4321 if (atomic_read(&clp->cl_count) > 1)
4322 nfs4_schedule_state_renewal(clp);
4323 nfs_put_client(clp);
9bc4e3ca 4324 kfree(data);
dc96aef9
AB		 4325}
4326
9bc4e3ca 4327static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4328{
9bc4e3ca
CL		 4329 struct nfs4_renewdata *data = calldata;
4330 struct nfs_client *clp = data->client;
4331 unsigned long timestamp = data->timestamp;
1da177e4 4332
c6d01c6f 4333 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4334 switch (task->tk_status) {
4335 case 0:
4336 break;
4337 case -NFS4ERR_LEASE_MOVED:
4338 nfs4_schedule_lease_moved_recovery(clp);
4339 break;
4340 default:
95baa25c 4341 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4342 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4343 return;
4344 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4345 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4346 return;
4347 }
4348 nfs4_schedule_path_down_recovery(clp);
1da177e4 4349 }
452e9352 4350 do_renew_lease(clp, timestamp);
1da177e4
LT		 4351}
4352
963d8fe5
TM		 4353static const struct rpc_call_ops nfs4_renew_ops = {
4354 .rpc_call_done = nfs4_renew_done,
dc96aef9 4355 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4356};
4357
2f60ea6b 4358static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4359{
4360 struct rpc_message msg = {
4361 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4362 .rpc_argp = clp,
b4454fe1 4363 .rpc_cred = cred,
1da177e4 4364 };
9bc4e3ca 4365 struct nfs4_renewdata *data;
1da177e4 4366
2f60ea6b
TM		 4367 if (renew_flags == 0)
4368 return 0;
0851de06
AB		 4369 if (!atomic_inc_not_zero(&clp->cl_count))
4370 return -EIO;
b569ad34 4371 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4372 if (data == NULL)
4373 return -ENOMEM;
4374 data->client = clp;
4375 data->timestamp = jiffies;
bc7a05ca 4376 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4377 &nfs4_renew_ops, data);
1da177e4
LT		 4378}
4379
8534d4ec 4380static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4381{
4382 struct rpc_message msg = {
4383 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4384 .rpc_argp = clp,
b4454fe1 4385 .rpc_cred = cred,
1da177e4
LT		 4386 };
4387 unsigned long now = jiffies;
4388 int status;
4389
bc7a05ca 4390 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4391 if (status < 0)
4392 return status;
452e9352 4393 do_renew_lease(clp, now);
1da177e4
LT		 4394 return 0;
4395}
4396
aa1870af
BF		 4397static inline int nfs4_server_supports_acls(struct nfs_server *server)
4398{
7dd7d959 4399 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4400}
4401
21f498c2
TM		 4402/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4403 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4404 * the stack.
4405 */
21f498c2 4406#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4407
e9e3d724
NH		 4408static int buf_to_pages_noslab(const void *buf, size_t buflen,
4409 struct page **pages, unsigned int *pgbase)
4410{
4411 struct page *newpage, **spages;
4412 int rc = 0;
4413 size_t len;
4414 spages = pages;
4415
4416 do {
21f498c2 4417 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4418 newpage = alloc_page(GFP_KERNEL);
4419
4420 if (newpage == NULL)
4421 goto unwind;
4422 memcpy(page_address(newpage), buf, len);
4423 buf += len;
4424 buflen -= len;
4425 *pages++ = newpage;
4426 rc++;
4427 } while (buflen != 0);
4428
4429 return rc;
4430
4431unwind:
4432 for(; rc > 0; rc--)
4433 __free_page(spages[rc-1]);
4434 return -ENOMEM;
4435}
4436
e50a1c2e
BF		 4437struct nfs4_cached_acl {
4438 int cached;
4439 size_t len;
3e9d4154 4440 char data[0];
e50a1c2e
BF		 4441};
4442
4443static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4444{
4445 struct nfs_inode *nfsi = NFS_I(inode);
4446
4447 spin_lock(&inode->i_lock);
4448 kfree(nfsi->nfs4_acl);
4449 nfsi->nfs4_acl = acl;
4450 spin_unlock(&inode->i_lock);
4451}
4452
4453static void nfs4_zap_acl_attr(struct inode *inode)
4454{
4455 nfs4_set_cached_acl(inode, NULL);
4456}
4457
4458static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4459{
4460 struct nfs_inode *nfsi = NFS_I(inode);
4461 struct nfs4_cached_acl *acl;
4462 int ret = -ENOENT;
4463
4464 spin_lock(&inode->i_lock);
4465 acl = nfsi->nfs4_acl;
4466 if (acl == NULL)
4467 goto out;
4468 if (buf == NULL) /* user is just asking for length */
4469 goto out_len;
4470 if (acl->cached == 0)
4471 goto out;
4472 ret = -ERANGE; /* see getxattr(2) man page */
4473 if (acl->len > buflen)
4474 goto out;
4475 memcpy(buf, acl->data, acl->len);
4476out_len:
4477 ret = acl->len;
4478out:
4479 spin_unlock(&inode->i_lock);
4480 return ret;
4481}
4482
5794d21e 4483static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4484{
4485 struct nfs4_cached_acl *acl;
b291f1b1 4486 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4487
1f1ea6c2 4488 if (buflen <= PAGE_SIZE) {
b291f1b1 4489 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4490 if (acl == NULL)
4491 goto out;
4492 acl->cached = 1;
5794d21e 4493 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4494 } else {
4495 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4496 if (acl == NULL)
4497 goto out;
4498 acl->cached = 0;
4499 }
4500 acl->len = acl_len;
4501out:
4502 nfs4_set_cached_acl(inode, acl);
4503}
4504
bf118a34
AA		 4505/*
4506 * The getxattr API returns the required buffer length when called with a
4507 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4508 * the required buf. On a NULL buf, we send a page of data to the server
4509 * guessing that the ACL request can be serviced by a page. If so, we cache
4510 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4511 * the cache. If not so, we throw away the page, and cache the required
4512 * length. The next getxattr call will then produce another round trip to
4513 * the server, this time with the input buf of the required size.
4514 */
16b4289c 4515static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4516{
bf118a34 4517 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4518 struct nfs_getaclargs args = {
4519 .fh = NFS_FH(inode),
4520 .acl_pages = pages,
4521 .acl_len = buflen,
4522 };
663c79b3
BH		 4523 struct nfs_getaclres res = {
4524 .acl_len = buflen,
4525 };
aa1870af
BF		 4526 struct rpc_message msg = {
4527 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4528 .rpc_argp = &args,
663c79b3 4529 .rpc_resp = &res,
aa1870af 4530 };
21f498c2
TM		 4531 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4532 int ret = -ENOMEM, i;
aa1870af 4533
bf118a34
AA		 4534 /* As long as we're doing a round trip to the server anyway,
4535 * let's be prepared for a page of acl data. */
4536 if (npages == 0)
4537 npages = 1;
21f498c2
TM		 4538 if (npages > ARRAY_SIZE(pages))
4539 return -ERANGE;
5a006899 4540
bf118a34
AA		 4541 for (i = 0; i < npages; i++) {
4542 pages[i] = alloc_page(GFP_KERNEL);
4543 if (!pages[i])
4544 goto out_free;
e50a1c2e 4545 }
5a006899
SP		 4546
4547 /* for decoding across pages */
4548 res.acl_scratch = alloc_page(GFP_KERNEL);
4549 if (!res.acl_scratch)
4550 goto out_free;
4551
bf118a34
AA		 4552 args.acl_len = npages * PAGE_SIZE;
4553 args.acl_pgbase = 0;
5a006899 4554
de040bec 4555 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4556 __func__, buf, buflen, npages, args.acl_len);
4557 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4558 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4559 if (ret)
4560 goto out_free;
bf118a34 4561
1f1ea6c2
TM		 4562 /* Handle the case where the passed-in buffer is too short */
4563 if (res.acl_flags & NFS4_ACL_TRUNC) {
4564 /* Did the user only issue a request for the acl length? */
4565 if (buf == NULL)
4566 goto out_ok;
e50a1c2e 4567 ret = -ERANGE;
1f1ea6c2 4568 goto out_free;
e50a1c2e 4569 }
1f1ea6c2 4570 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4571 if (buf) {
4572 if (res.acl_len > buflen) {
4573 ret = -ERANGE;
4574 goto out_free;
4575 }
1f1ea6c2 4576 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4577 }
1f1ea6c2
TM		 4578out_ok:
4579 ret = res.acl_len;
e50a1c2e 4580out_free:
bf118a34
AA		 4581 for (i = 0; i < npages; i++)
4582 if (pages[i])
4583 __free_page(pages[i]);
331818f1
TM		 4584 if (res.acl_scratch)
4585 __free_page(res.acl_scratch);
aa1870af
BF		 4586 return ret;
4587}
4588
16b4289c
TM		 4589static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4590{
4591 struct nfs4_exception exception = { };
4592 ssize_t ret;
4593 do {
4594 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4595 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4596 if (ret >= 0)
4597 break;
4598 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4599 } while (exception.retry);
4600 return ret;
4601}
4602
e50a1c2e
BF		 4603static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4604{
4605 struct nfs_server *server = NFS_SERVER(inode);
4606 int ret;
4607
4608 if (!nfs4_server_supports_acls(server))
4609 return -EOPNOTSUPP;
4610 ret = nfs_revalidate_inode(server, inode);
4611 if (ret < 0)
4612 return ret;
08a22b39
AK		 4613 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4614 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4615 ret = nfs4_read_cached_acl(inode, buf, buflen);
4616 if (ret != -ENOENT)
bf118a34
AA		 4617 /* -ENOENT is returned if there is no ACL or if there is an ACL
4618 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4619 return ret;
4620 return nfs4_get_acl_uncached(inode, buf, buflen);
4621}
4622
16b4289c 4623static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4624{
4625 struct nfs_server *server = NFS_SERVER(inode);
4626 struct page *pages[NFS4ACL_MAXPAGES];
4627 struct nfs_setaclargs arg = {
4628 .fh = NFS_FH(inode),
4629 .acl_pages = pages,
4630 .acl_len = buflen,
4631 };
73c403a9 4632 struct nfs_setaclres res;
4b580ee3
BF		 4633 struct rpc_message msg = {
4634 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4635 .rpc_argp = &arg,
73c403a9 4636 .rpc_resp = &res,
4b580ee3 4637 };
21f498c2 4638 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4639 int ret, i;
4b580ee3
BF		 4640
4641 if (!nfs4_server_supports_acls(server))
4642 return -EOPNOTSUPP;
21f498c2
TM		 4643 if (npages > ARRAY_SIZE(pages))
4644 return -ERANGE;
e9e3d724
NH		 4645 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4646 if (i < 0)
4647 return i;
57ec14c5 4648 nfs4_inode_return_delegation(inode);
7c513058 4649 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4650
4651 /*
4652 * Free each page after tx, so the only ref left is
4653 * held by the network stack
4654 */
4655 for (; i > 0; i--)
4656 put_page(pages[i-1]);
4657
08a22b39
AK		 4658 /*
4659 * Acl update can result in inode attribute update.
4660 * so mark the attribute cache invalid.
4661 */
4662 spin_lock(&inode->i_lock);
4663 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4664 spin_unlock(&inode->i_lock);
f41f7418
TM		 4665 nfs_access_zap_cache(inode);
4666 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4667 return ret;
4668}
4669
16b4289c
TM		 4670static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4671{
4672 struct nfs4_exception exception = { };
4673 int err;
4674 do {
c1578b76
TM		 4675 err = __nfs4_proc_set_acl(inode, buf, buflen);
4676 trace_nfs4_set_acl(inode, err);
4677 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4678 &exception);
4679 } while (exception.retry);
4680 return err;
4681}
4682
aa9c2669
DQ		 4683#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4684static int _nfs4_get_security_label(struct inode *inode, void *buf,
4685 size_t buflen)
4686{
4687 struct nfs_server *server = NFS_SERVER(inode);
4688 struct nfs_fattr fattr;
4689 struct nfs4_label label = {0, 0, buflen, buf};
4690
4691 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4692 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4693 .fh = NFS_FH(inode),
4694 .bitmask = bitmask,
4695 };
4696 struct nfs4_getattr_res res = {
4697 .fattr = &fattr,
4698 .label = &label,
4699 .server = server,
4700 };
4701 struct rpc_message msg = {
4702 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4703 .rpc_argp = &arg,
aa9c2669
DQ		 4704 .rpc_resp = &res,
4705 };
4706 int ret;
4707
4708 nfs_fattr_init(&fattr);
4709
fcb63a9b 4710 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4711 if (ret)
4712 return ret;
4713 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4714 return -ENOENT;
4715 if (buflen < label.len)
4716 return -ERANGE;
4717 return 0;
4718}
4719
4720static int nfs4_get_security_label(struct inode *inode, void *buf,
4721 size_t buflen)
4722{
4723 struct nfs4_exception exception = { };
4724 int err;
4725
4726 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4727 return -EOPNOTSUPP;
4728
4729 do {
c1578b76
TM		 4730 err = _nfs4_get_security_label(inode, buf, buflen);
4731 trace_nfs4_get_security_label(inode, err);
4732 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4733 &exception);
4734 } while (exception.retry);
4735 return err;
4736}
4737
4738static int _nfs4_do_set_security_label(struct inode *inode,
4739 struct nfs4_label *ilabel,
4740 struct nfs_fattr *fattr,
4741 struct nfs4_label *olabel)
4742{
4743
4744 struct iattr sattr = {0};
4745 struct nfs_server *server = NFS_SERVER(inode);
4746 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4747 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4748 .fh = NFS_FH(inode),
4749 .iap = &sattr,
4750 .server = server,
4751 .bitmask = bitmask,
4752 .label = ilabel,
4753 };
4754 struct nfs_setattrres res = {
4755 .fattr = fattr,
4756 .label = olabel,
4757 .server = server,
4758 };
4759 struct rpc_message msg = {
4760 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4761 .rpc_argp = &arg,
aa9c2669
DQ		 4762 .rpc_resp = &res,
4763 };
4764 int status;
4765
12207f69 4766 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4767
12207f69 4768 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4769 if (status)
4770 dprintk("%s failed: %d\n", __func__, status);
4771
4772 return status;
4773}
4774
4775static int nfs4_do_set_security_label(struct inode *inode,
4776 struct nfs4_label *ilabel,
4777 struct nfs_fattr *fattr,
4778 struct nfs4_label *olabel)
4779{
4780 struct nfs4_exception exception = { };
4781 int err;
4782
4783 do {
c1578b76
TM		 4784 err = _nfs4_do_set_security_label(inode, ilabel,
4785 fattr, olabel);
4786 trace_nfs4_set_security_label(inode, err);
4787 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4788 &exception);
4789 } while (exception.retry);
4790 return err;
4791}
4792
4793static int
4794nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4795{
4796 struct nfs4_label ilabel, *olabel = NULL;
4797 struct nfs_fattr fattr;
4798 struct rpc_cred *cred;
4799 struct inode *inode = dentry->d_inode;
4800 int status;
4801
4802 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4803 return -EOPNOTSUPP;
4804
4805 nfs_fattr_init(&fattr);
4806
4807 ilabel.pi = 0;
4808 ilabel.lfs = 0;
4809 ilabel.label = (char *)buf;
4810 ilabel.len = buflen;
4811
4812 cred = rpc_lookup_cred();
4813 if (IS_ERR(cred))
4814 return PTR_ERR(cred);
4815
4816 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4817 if (IS_ERR(olabel)) {
4818 status = -PTR_ERR(olabel);
4819 goto out;
4820 }
4821
4822 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4823 if (status == 0)
4824 nfs_setsecurity(inode, &fattr, olabel);
4825
4826 nfs4_label_free(olabel);
4827out:
4828 put_rpccred(cred);
4829 return status;
4830}
4831#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4832
4833
1da177e4 4834static int
8478eaa1
N		 4835nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4836 struct nfs4_state *state, long *timeout)
1da177e4 4837{
aa5190d0
TM		 4838 struct nfs_client *clp = server->nfs_client;
4839
4840 if (task->tk_status >= 0)
1da177e4
LT		 4841 return 0;
4842 switch(task->tk_status) {
a1d0b5ee 4843 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4844 case -NFS4ERR_ADMIN_REVOKED:
4845 case -NFS4ERR_BAD_STATEID:
4846 case -NFS4ERR_OPENMODE:
4847 if (state == NULL)
4848 break;
5d422301 4849 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4850 goto recovery_failed;
0400a6b0 4851 goto wait_on_recovery;
0ced63d1 4852 case -NFS4ERR_EXPIRED:
5d422301
TM		 4853 if (state != NULL) {
4854 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4855 goto recovery_failed;
5d422301 4856 }
1da177e4 4857 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4858 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4859 nfs4_schedule_lease_recovery(clp);
4860 goto wait_on_recovery;
519ae255
CL		 4861 case -NFS4ERR_MOVED:
4862 if (nfs4_schedule_migration_recovery(server) < 0)
4863 goto recovery_failed;
4864 goto wait_on_recovery;
8ef2f8d4
CL		 4865 case -NFS4ERR_LEASE_MOVED:
4866 nfs4_schedule_lease_moved_recovery(clp);
4867 goto wait_on_recovery;
4745e315
AA		 4868#if defined(CONFIG_NFS_V4_1)
4869 case -NFS4ERR_BADSESSION:
4870 case -NFS4ERR_BADSLOT:
4871 case -NFS4ERR_BAD_HIGH_SLOT:
4872 case -NFS4ERR_DEADSESSION:
4873 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4874 case -NFS4ERR_SEQ_FALSE_RETRY:
4875 case -NFS4ERR_SEQ_MISORDERED:
4876 dprintk("%s ERROR %d, Reset session\n", __func__,
4877 task->tk_status);
9f594791 4878 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4879 goto wait_on_recovery;
4745e315 4880#endif /* CONFIG_NFS_V4_1 */
1da177e4 4881 case -NFS4ERR_DELAY:
aa5190d0 4882 nfs_inc_server_stats(server, NFSIOS_DELAY);
8478eaa1
N		 4883 rpc_delay(task, nfs4_update_delay(timeout));
4884 goto restart_call;
006ea73e 4885 case -NFS4ERR_GRACE:
1da177e4 4886 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4887 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4888 case -NFS4ERR_OLD_STATEID:
f1478c13 4889 goto restart_call;
1da177e4
LT		 4890 }
4891 task->tk_status = nfs4_map_errors(task->tk_status);
4892 return 0;
9f51a78e 4893recovery_failed:
5d422301
TM		 4894 task->tk_status = -EIO;
4895 return 0;
0400a6b0 4896wait_on_recovery:
a2c0b9e2 4897 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4898 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4899 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4900 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4901 goto recovery_failed;
f1478c13 4902restart_call:
a2c0b9e2
TM		 4903 task->tk_status = 0;
4904 return -EAGAIN;
1da177e4
LT		 4905}
4906
f092075d
CL		 4907static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4908 nfs4_verifier *bootverf)
cd93710e
CL		 4909{
4910 __be32 verf[2];
4911
2c820d9a
CL		 4912 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4913 /* An impossible timestamp guarantees this value
4914 * will never match a generated boot time. */
4915 verf[0] = 0;
17f26b12 4916 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4917 } else {
f092075d 4918 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4919 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4920 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4921 }
cd93710e
CL		 4922 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4923}
4924
e984a55a 4925static unsigned int
ceb3a16c 4926nfs4_init_nonuniform_client_string(struct nfs_client *clp,
e984a55a
CL		 4927 char *buf, size_t len)
4928{
4929 unsigned int result;
4930
ceb3a16c
TM		 4931 if (clp->cl_owner_id != NULL)
4932 return strlcpy(buf, clp->cl_owner_id, len);
4933
e984a55a
CL		 4934 rcu_read_lock();
4935 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4936 clp->cl_ipaddr,
4937 rpc_peeraddr2str(clp->cl_rpcclient,
4938 RPC_DISPLAY_ADDR),
4939 rpc_peeraddr2str(clp->cl_rpcclient,
4940 RPC_DISPLAY_PROTO));
4941 rcu_read_unlock();
ceb3a16c 4942 clp->cl_owner_id = kstrdup(buf, GFP_KERNEL);
e984a55a
CL		 4943 return result;
4944}
4945
4946static unsigned int
ceb3a16c 4947nfs4_init_uniform_client_string(struct nfs_client *clp,
e984a55a
CL		 4948 char *buf, size_t len)
4949{
55b59293 4950 const char *nodename = clp->cl_rpcclient->cl_nodename;
ceb3a16c
TM		 4951 unsigned int result;
4952
4953 if (clp->cl_owner_id != NULL)
4954 return strlcpy(buf, clp->cl_owner_id, len);
6f2ea7f2
CL		 4955
4956 if (nfs4_client_id_uniquifier[0] != '\0')
ceb3a16c 4957 result = scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
55b59293
TM		 4958 clp->rpc_ops->version,
4959 clp->cl_minorversion,
4960 nfs4_client_id_uniquifier,
4961 nodename);
ceb3a16c
TM		 4962 else
4963 result = scnprintf(buf, len, "Linux NFSv%u.%u %s",
e984a55a 4964 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4965 nodename);
ceb3a16c
TM		 4966 clp->cl_owner_id = kstrdup(buf, GFP_KERNEL);
4967 return result;
e984a55a
CL		 4968}
4969
706cb8db
CL		 4970/*
4971 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
4972 * services. Advertise one based on the address family of the
4973 * clientaddr.
4974 */
4975static unsigned int
4976nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
4977{
4978 if (strchr(clp->cl_ipaddr, ':') != NULL)
4979 return scnprintf(buf, len, "tcp6");
4980 else
4981 return scnprintf(buf, len, "tcp");
4982}
4983
f11b2a1c
JL		 4984static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
4985{
4986 struct nfs4_setclientid *sc = calldata;
4987
4988 if (task->tk_status == 0)
4989 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
4990}
4991
4992static const struct rpc_call_ops nfs4_setclientid_ops = {
4993 .rpc_call_done = nfs4_setclientid_done,
4994};
4995
6bbb4ae8
CL		 4996/**
4997 * nfs4_proc_setclientid - Negotiate client ID
4998 * @clp: state data structure
4999 * @program: RPC program for NFSv4 callback service
5000 * @port: IP port number for NFS4 callback service
5001 * @cred: RPC credential to use for this call
5002 * @res: where to place the result
5003 *
5004 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5005 */
bb8b27e5
TM		 5006int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5007 unsigned short port, struct rpc_cred *cred,
5008 struct nfs4_setclientid_res *res)
1da177e4
LT		 5009{
5010 nfs4_verifier sc_verifier;
5011 struct nfs4_setclientid setclientid = {
5012 .sc_verifier = &sc_verifier,
5013 .sc_prog = program,
f4eecd5d 5014 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 5015 };
5016 struct rpc_message msg = {
5017 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5018 .rpc_argp = &setclientid,
bb8b27e5 5019 .rpc_resp = res,
286d7d6a 5020 .rpc_cred = cred,
1da177e4 5021 };
f11b2a1c
JL		 5022 struct rpc_task *task;
5023 struct rpc_task_setup task_setup_data = {
5024 .rpc_client = clp->cl_rpcclient,
5025 .rpc_message = &msg,
5026 .callback_ops = &nfs4_setclientid_ops,
5027 .callback_data = &setclientid,
5028 .flags = RPC_TASK_TIMEOUT,
5029 };
6bbb4ae8 5030 int status;
1da177e4 5031
de734831 5032 /* nfs_client_id4 */
f092075d 5033 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 5034 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5035 setclientid.sc_name_len =
5036 nfs4_init_uniform_client_string(clp,
5037 setclientid.sc_name,
5038 sizeof(setclientid.sc_name));
5039 else
5040 setclientid.sc_name_len =
5041 nfs4_init_nonuniform_client_string(clp,
5042 setclientid.sc_name,
5043 sizeof(setclientid.sc_name));
de734831 5044 /* cb_client4 */
706cb8db
CL		 5045 setclientid.sc_netid_len =
5046 nfs4_init_callback_netid(clp,
5047 setclientid.sc_netid,
5048 sizeof(setclientid.sc_netid));
de734831 5049 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5050 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5051 clp->cl_ipaddr, port >> 8, port & 255);
5052
6bbb4ae8
CL		 5053 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
5054 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5055 setclientid.sc_name_len, setclientid.sc_name);
f11b2a1c
JL		 5056 task = rpc_run_task(&task_setup_data);
5057 if (IS_ERR(task)) {
5058 status = PTR_ERR(task);
5059 goto out;
5060 }
5061 status = task->tk_status;
5062 if (setclientid.sc_cred) {
5063 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5064 put_rpccred(setclientid.sc_cred);
5065 }
5066 rpc_put_task(task);
5067out:
c6d01c6f 5068 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5069 dprintk("NFS reply setclientid: %d\n", status);
5070 return status;
1da177e4
LT		 5071}
5072
6bbb4ae8
CL		 5073/**
5074 * nfs4_proc_setclientid_confirm - Confirm client ID
5075 * @clp: state data structure
5076 * @res: result of a previous SETCLIENTID
5077 * @cred: RPC credential to use for this call
5078 *
5079 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5080 */
fd954ae1 5081int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5082 struct nfs4_setclientid_res *arg,
5083 struct rpc_cred *cred)
1da177e4 5084{
1da177e4
LT		 5085 struct rpc_message msg = {
5086 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5087 .rpc_argp = arg,
286d7d6a 5088 .rpc_cred = cred,
1da177e4 5089 };
1da177e4
LT		 5090 int status;
5091
6bbb4ae8
CL		 5092 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5093 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5094 clp->cl_clientid);
1bd714f2 5095 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5096 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5097 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5098 return status;
5099}
5100
fe650407
TM		 5101struct nfs4_delegreturndata {
5102 struct nfs4_delegreturnargs args;
fa178f29 5103 struct nfs4_delegreturnres res;
fe650407
TM		 5104 struct nfs_fh fh;
5105 nfs4_stateid stateid;
26e976a8 5106 unsigned long timestamp;
fa178f29 5107 struct nfs_fattr fattr;
fe650407 5108 int rpc_status;
039b756a
PT		 5109 struct inode *inode;
5110 bool roc;
5111 u32 roc_barrier;
fe650407
TM		 5112};
5113
fe650407
TM		 5114static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5115{
5116 struct nfs4_delegreturndata *data = calldata;
938e1010 5117
14516c3a
TM		 5118 if (!nfs4_sequence_done(task, &data->res.seq_res))
5119 return;
938e1010 5120
ca8acf8d 5121 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5122 switch (task->tk_status) {
79708861 5123 case 0:
fa178f29 5124 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5125 case -NFS4ERR_ADMIN_REVOKED:
5126 case -NFS4ERR_DELEG_REVOKED:
5127 case -NFS4ERR_BAD_STATEID:
5128 case -NFS4ERR_OLD_STATEID:
5129 case -NFS4ERR_STALE_STATEID:
5130 case -NFS4ERR_EXPIRED:
5131 task->tk_status = 0;
039b756a
PT		 5132 if (data->roc)
5133 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5134 break;
79708861 5135 default:
8478eaa1
N		 5136 if (nfs4_async_handle_error(task, data->res.server,
5137 NULL, NULL) == -EAGAIN) {
d00c5d43 5138 rpc_restart_call_prepare(task);
79708861
RL		 5139 return;
5140 }
5141 }
5142 data->rpc_status = task->tk_status;
fe650407
TM		 5143}
5144
5145static void nfs4_delegreturn_release(void *calldata)
5146{
039b756a
PT		 5147 struct nfs4_delegreturndata *data = calldata;
5148
5149 if (data->roc)
5150 pnfs_roc_release(data->inode);
fe650407
TM		 5151 kfree(calldata);
5152}
5153
938e1010
AA		 5154static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5155{
5156 struct nfs4_delegreturndata *d_data;
5157
5158 d_data = (struct nfs4_delegreturndata *)data;
5159
039b756a
PT		 5160 if (d_data->roc &&
5161 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5162 return;
5163
d9afbd1b
TM		 5164 nfs4_setup_sequence(d_data->res.server,
5165 &d_data->args.seq_args,
5166 &d_data->res.seq_res,
5167 task);
938e1010 5168}
938e1010 5169
c8d149f3 5170static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5171 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5172 .rpc_call_done = nfs4_delegreturn_done,
5173 .rpc_release = nfs4_delegreturn_release,
5174};
5175
e6f81075 5176static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5177{
5178 struct nfs4_delegreturndata *data;
fa178f29 5179 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5180 struct rpc_task *task;
5138fde0
TM		 5181 struct rpc_message msg = {
5182 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5183 .rpc_cred = cred,
5184 };
c970aa85
TM		 5185 struct rpc_task_setup task_setup_data = {
5186 .rpc_client = server->client,
5138fde0 5187 .rpc_message = &msg,
c970aa85
TM		 5188 .callback_ops = &nfs4_delegreturn_ops,
5189 .flags = RPC_TASK_ASYNC,
5190 };
e6f81075 5191 int status = 0;
fe650407 5192
8535b2be 5193 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5194 if (data == NULL)
5195 return -ENOMEM;
a9c92d6b 5196 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5197 data->args.fhandle = &data->fh;
5198 data->args.stateid = &data->stateid;
9e907fec 5199 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5200 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5201 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5202 data->res.fattr = &data->fattr;
5203 data->res.server = server;
5138fde0 5204 nfs_fattr_init(data->res.fattr);
26e976a8 5205 data->timestamp = jiffies;
fe650407 5206 data->rpc_status = 0;
039b756a
PT		 5207 data->inode = inode;
5208 data->roc = list_empty(&NFS_I(inode)->open_files) ?
5209 pnfs_roc(inode) : false;
fe650407 5210
c970aa85 5211 task_setup_data.callback_data = data;
1174dd1f
TM		 5212 msg.rpc_argp = &data->args;
5213 msg.rpc_resp = &data->res;
c970aa85 5214 task = rpc_run_task(&task_setup_data);
7a1218a2 5215 if (IS_ERR(task))
fe650407 5216 return PTR_ERR(task);
e6f81075
TM		 5217 if (!issync)
5218 goto out;
fe650407 5219 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5220 if (status != 0)
5221 goto out;
5222 status = data->rpc_status;
e144cbcc
TM		 5223 if (status == 0)
5224 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5225 else
5226 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5227out:
e6b3c4db 5228 rpc_put_task(task);
fe650407 5229 return status;
1da177e4
LT		 5230}
5231
e6f81075 5232int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5233{
5234 struct nfs_server *server = NFS_SERVER(inode);
5235 struct nfs4_exception exception = { };
5236 int err;
5237 do {
e6f81075 5238 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5239 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5240 switch (err) {
5241 case -NFS4ERR_STALE_STATEID:
5242 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5243 case 0:
5244 return 0;
5245 }
5246 err = nfs4_handle_exception(server, err, &exception);
5247 } while (exception.retry);
5248 return err;
5249}
5250
5251#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5252#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5253
5254/*
5255 * sleep, with exponential backoff, and retry the LOCK operation.
5256 */
5257static unsigned long
5258nfs4_set_lock_task_retry(unsigned long timeout)
5259{
416ad3c9 5260 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5261 timeout <<= 1;
5262 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5263 return NFS4_LOCK_MAXTIMEOUT;
5264 return timeout;
5265}
5266
1da177e4
LT		 5267static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5268{
5269 struct inode *inode = state->inode;
5270 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5271 struct nfs_client *clp = server->nfs_client;
911d1aaf 5272 struct nfs_lockt_args arg = {
1da177e4 5273 .fh = NFS_FH(inode),
911d1aaf 5274 .fl = request,
1da177e4 5275 };
911d1aaf
TM		 5276 struct nfs_lockt_res res = {
5277 .denied = request,
1da177e4
LT		 5278 };
5279 struct rpc_message msg = {
5280 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5281 .rpc_argp = &arg,
5282 .rpc_resp = &res,
5283 .rpc_cred = state->owner->so_cred,
5284 };
1da177e4
LT		 5285 struct nfs4_lock_state *lsp;
5286 int status;
5287
911d1aaf 5288 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5289 status = nfs4_set_lock_state(state, request);
5290 if (status != 0)
5291 goto out;
5292 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5293 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5294 arg.lock_owner.s_dev = server->s_dev;
7c513058 5295 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5296 switch (status) {
5297 case 0:
5298 request->fl_type = F_UNLCK;
5299 break;
5300 case -NFS4ERR_DENIED:
5301 status = 0;
1da177e4 5302 }
70cc6487 5303 request->fl_ops->fl_release_private(request);
a6f951dd 5304 request->fl_ops = NULL;
8d0a8a9d 5305out:
1da177e4
LT		 5306 return status;
5307}
5308
5309static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5310{
5311 struct nfs4_exception exception = { };
5312 int err;
5313
5314 do {
d1b748a5
TM		 5315 err = _nfs4_proc_getlk(state, cmd, request);
5316 trace_nfs4_get_lock(request, state, cmd, err);
5317 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5318 &exception);
5319 } while (exception.retry);
5320 return err;
5321}
5322
5323static int do_vfs_lock(struct file *file, struct file_lock *fl)
5324{
5325 int res = 0;
5326 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5327 case FL_POSIX:
5328 res = posix_lock_file_wait(file, fl);
5329 break;
5330 case FL_FLOCK:
5331 res = flock_lock_file_wait(file, fl);
5332 break;
5333 default:
5334 BUG();
5335 }
1da177e4
LT		 5336 return res;
5337}
5338
faf5f49c 5339struct nfs4_unlockdata {
911d1aaf
TM		 5340 struct nfs_locku_args arg;
5341 struct nfs_locku_res res;
faf5f49c
TM		 5342 struct nfs4_lock_state *lsp;
5343 struct nfs_open_context *ctx;
911d1aaf
TM		 5344 struct file_lock fl;
5345 const struct nfs_server *server;
26e976a8 5346 unsigned long timestamp;
faf5f49c
TM		 5347};
5348
911d1aaf
TM		 5349static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5350 struct nfs_open_context *ctx,
5351 struct nfs4_lock_state *lsp,
5352 struct nfs_seqid *seqid)
5353{
5354 struct nfs4_unlockdata *p;
5355 struct inode *inode = lsp->ls_state->inode;
5356
8535b2be 5357 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5358 if (p == NULL)
5359 return NULL;
5360 p->arg.fh = NFS_FH(inode);
5361 p->arg.fl = &p->fl;
5362 p->arg.seqid = seqid;
c1d51931 5363 p->res.seqid = seqid;
911d1aaf
TM		 5364 p->lsp = lsp;
5365 atomic_inc(&lsp->ls_count);
5366 /* Ensure we don't close file until we're done freeing locks! */
5367 p->ctx = get_nfs_open_context(ctx);
5368 memcpy(&p->fl, fl, sizeof(p->fl));
5369 p->server = NFS_SERVER(inode);
5370 return p;
5371}
5372
06f814a3 5373static void nfs4_locku_release_calldata(void *data)
faf5f49c 5374{
963d8fe5 5375 struct nfs4_unlockdata *calldata = data;
911d1aaf 5376 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5377 nfs4_put_lock_state(calldata->lsp);
5378 put_nfs_open_context(calldata->ctx);
5379 kfree(calldata);
faf5f49c
TM		 5380}
5381
963d8fe5 5382static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5383{
963d8fe5 5384 struct nfs4_unlockdata *calldata = data;
faf5f49c 5385
14516c3a
TM		 5386 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5387 return;
faf5f49c
TM		 5388 switch (task->tk_status) {
5389 case 0:
26e976a8 5390 renew_lease(calldata->server, calldata->timestamp);
c69899a1
TM		 5391 do_vfs_lock(calldata->fl.fl_file, &calldata->fl);
5392 if (nfs4_update_lock_stateid(calldata->lsp,
5393 &calldata->res.stateid))
5394 break;
9e33bed5
TM		 5395 case -NFS4ERR_BAD_STATEID:
5396 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5397 case -NFS4ERR_STALE_STATEID:
5398 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5399 if (!nfs4_stateid_match(&calldata->arg.stateid,
5400 &calldata->lsp->ls_stateid))
5401 rpc_restart_call_prepare(task);
faf5f49c
TM		 5402 break;
5403 default:
8478eaa1
N		 5404 if (nfs4_async_handle_error(task, calldata->server,
5405 NULL, NULL) == -EAGAIN)
d00c5d43 5406 rpc_restart_call_prepare(task);
faf5f49c 5407 }
2b1bc308 5408 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5409}
5410
4ce70ada 5411static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5412{
4ce70ada 5413 struct nfs4_unlockdata *calldata = data;
faf5f49c 5414
911d1aaf 5415 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5416 goto out_wait;
425c1d4e 5417 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5418 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5419 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5420 goto out_no_action;
faf5f49c 5421 }
26e976a8 5422 calldata->timestamp = jiffies;
035168ab 5423 if (nfs4_setup_sequence(calldata->server,
a893693c 5424 &calldata->arg.seq_args,
2240a9e2
TM		 5425 &calldata->res.seq_res,
5426 task) != 0)
5427 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5428 return;
5429out_no_action:
5430 task->tk_action = NULL;
5431out_wait:
5432 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5433}
5434
963d8fe5 5435static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5436 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5437 .rpc_call_done = nfs4_locku_done,
06f814a3 5438 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5439};
5440
a5d16a4d
TM		 5441static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5442 struct nfs_open_context *ctx,
5443 struct nfs4_lock_state *lsp,
5444 struct nfs_seqid *seqid)
5445{
5446 struct nfs4_unlockdata *data;
5138fde0
TM		 5447 struct rpc_message msg = {
5448 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5449 .rpc_cred = ctx->cred,
5450 };
c970aa85
TM		 5451 struct rpc_task_setup task_setup_data = {
5452 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5453 .rpc_message = &msg,
c970aa85 5454 .callback_ops = &nfs4_locku_ops,
101070ca 5455 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5456 .flags = RPC_TASK_ASYNC,
5457 };
a5d16a4d 5458
fa940720
WAA		 5459 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5460 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5461
137d6aca
FF		 5462 /* Ensure this is an unlock - when canceling a lock, the
5463 * canceled lock is passed in, and it won't be an unlock.
5464 */
5465 fl->fl_type = F_UNLCK;
5466
a5d16a4d
TM		 5467 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5468 if (data == NULL) {
5469 nfs_free_seqid(seqid);
5470 return ERR_PTR(-ENOMEM);
5471 }
5472
a9c92d6b 5473 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5474 msg.rpc_argp = &data->arg;
5475 msg.rpc_resp = &data->res;
c970aa85
TM		 5476 task_setup_data.callback_data = data;
5477 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5478}
5479
faf5f49c
TM		 5480static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5481{
65b62a29
TM		 5482 struct inode *inode = state->inode;
5483 struct nfs4_state_owner *sp = state->owner;
5484 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5485 struct nfs_seqid *seqid;
1da177e4 5486 struct nfs4_lock_state *lsp;
06f814a3 5487 struct rpc_task *task;
b4019c0e 5488 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5489 int status = 0;
536ff0f8 5490 unsigned char fl_flags = request->fl_flags;
faf5f49c 5491
8d0a8a9d 5492 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5493 /* Unlock _before_ we do the RPC call */
5494 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5495 /* Exclude nfs_delegation_claim_locks() */
5496 mutex_lock(&sp->so_delegreturn_mutex);
5497 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5498 down_read(&nfsi->rwsem);
5499 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5500 up_read(&nfsi->rwsem);
65b62a29 5501 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5502 goto out;
19e03c57
TM		 5503 }
5504 up_read(&nfsi->rwsem);
65b62a29 5505 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5506 if (status != 0)
9b073574
TM		 5507 goto out;
5508 /* Is this a delegated lock? */
8d0a8a9d 5509 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5510 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5511 goto out;
b4019c0e
TM		 5512 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5513 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5514 status = -ENOMEM;
badc76dd 5515 if (IS_ERR(seqid))
9b073574 5516 goto out;
cd3758e3 5517 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5518 status = PTR_ERR(task);
5519 if (IS_ERR(task))
9b073574 5520 goto out;
a5d16a4d 5521 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5522 rpc_put_task(task);
9b073574 5523out:
536ff0f8 5524 request->fl_flags = fl_flags;
d1b748a5 5525 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5526 return status;
5527}
5528
a5d16a4d
TM		 5529struct nfs4_lockdata {
5530 struct nfs_lock_args arg;
5531 struct nfs_lock_res res;
5532 struct nfs4_lock_state *lsp;
5533 struct nfs_open_context *ctx;
5534 struct file_lock fl;
26e976a8 5535 unsigned long timestamp;
a5d16a4d
TM		 5536 int rpc_status;
5537 int cancelled;
66179efe 5538 struct nfs_server *server;
a5d16a4d
TM		 5539};
5540
5541static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5542 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5543 gfp_t gfp_mask)
1da177e4 5544{
a5d16a4d
TM		 5545 struct nfs4_lockdata *p;
5546 struct inode *inode = lsp->ls_state->inode;
1da177e4 5547 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5548 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5549
8535b2be 5550 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5551 if (p == NULL)
5552 return NULL;
5553
5554 p->arg.fh = NFS_FH(inode);
5555 p->arg.fl = &p->fl;
8535b2be 5556 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5557 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5558 goto out_free;
b4019c0e
TM		 5559 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5560 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5561 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5562 goto out_free_seqid;
7539bbab 5563 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5564 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5565 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5566 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5567 p->lsp = lsp;
66179efe 5568 p->server = server;
a5d16a4d
TM		 5569 atomic_inc(&lsp->ls_count);
5570 p->ctx = get_nfs_open_context(ctx);
5571 memcpy(&p->fl, fl, sizeof(p->fl));
5572 return p;
2f74c0a0
TM		 5573out_free_seqid:
5574 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5575out_free:
5576 kfree(p);
5577 return NULL;
5578}
5579
5580static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5581{
5582 struct nfs4_lockdata *data = calldata;
5583 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5584
3110ff80 5585 dprintk("%s: begin!\n", __func__);
2f74c0a0 5586 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5587 goto out_wait;
a5d16a4d 5588 /* Do we need to do an open_to_lock_owner? */
6b447539 5589 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5590 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5591 goto out_release_lock_seqid;
8fe72bac 5592 }
425c1d4e
TM		 5593 nfs4_stateid_copy(&data->arg.open_stateid,
5594 &state->open_stateid);
a5d16a4d 5595 data->arg.new_lock_owner = 1;
c1d51931 5596 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5597 } else {
2f74c0a0 5598 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5599 nfs4_stateid_copy(&data->arg.lock_stateid,
5600 &data->lsp->ls_stateid);
5601 }
5d422301
TM		 5602 if (!nfs4_valid_open_stateid(state)) {
5603 data->rpc_status = -EBADF;
5604 task->tk_action = NULL;
5605 goto out_release_open_seqid;
5606 }
26e976a8 5607 data->timestamp = jiffies;
035168ab
TM		 5608 if (nfs4_setup_sequence(data->server,
5609 &data->arg.seq_args,
2240a9e2 5610 &data->res.seq_res,
d9afbd1b 5611 task) == 0)
66179efe 5612 return;
5d422301 5613out_release_open_seqid:
2240a9e2
TM		 5614 nfs_release_seqid(data->arg.open_seqid);
5615out_release_lock_seqid:
5616 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5617out_wait:
5618 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5619 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5620}
5621
a5d16a4d
TM		 5622static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5623{
5624 struct nfs4_lockdata *data = calldata;
39071e6f 5625 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5626
3110ff80 5627 dprintk("%s: begin!\n", __func__);
a5d16a4d 5628
14516c3a
TM		 5629 if (!nfs4_sequence_done(task, &data->res.seq_res))
5630 return;
66179efe 5631
a5d16a4d 5632 data->rpc_status = task->tk_status;
425c1d4e
TM		 5633 switch (task->tk_status) {
5634 case 0:
39071e6f
TM		 5635 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode),
5636 data->timestamp);
c69899a1
TM		 5637 if (data->arg.new_lock) {
5638 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
5639 if (do_vfs_lock(data->fl.fl_file, &data->fl) < 0) {
5640 rpc_restart_call_prepare(task);
5641 break;
5642 }
5643 }
39071e6f
TM		 5644 if (data->arg.new_lock_owner != 0) {
5645 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5646 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5647 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5648 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5649 rpc_restart_call_prepare(task);
425c1d4e
TM		 5650 break;
5651 case -NFS4ERR_BAD_STATEID:
5652 case -NFS4ERR_OLD_STATEID:
5653 case -NFS4ERR_STALE_STATEID:
5654 case -NFS4ERR_EXPIRED:
5655 if (data->arg.new_lock_owner != 0) {
5656 if (!nfs4_stateid_match(&data->arg.open_stateid,
5657 &lsp->ls_state->open_stateid))
5658 rpc_restart_call_prepare(task);
5659 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5660 &lsp->ls_stateid))
5661 rpc_restart_call_prepare(task);
a5d16a4d 5662 }
3110ff80 5663 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5664}
5665
5666static void nfs4_lock_release(void *calldata)
5667{
5668 struct nfs4_lockdata *data = calldata;
5669
3110ff80 5670 dprintk("%s: begin!\n", __func__);
2f74c0a0 5671 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5672 if (data->cancelled != 0) {
5673 struct rpc_task *task;
5674 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5675 data->arg.lock_seqid);
5676 if (!IS_ERR(task))
bf294b41 5677 rpc_put_task_async(task);
3110ff80 5678 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5679 } else
5680 nfs_free_seqid(data->arg.lock_seqid);
5681 nfs4_put_lock_state(data->lsp);
5682 put_nfs_open_context(data->ctx);
5683 kfree(data);
3110ff80 5684 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5685}
5686
5687static const struct rpc_call_ops nfs4_lock_ops = {
5688 .rpc_call_prepare = nfs4_lock_prepare,
5689 .rpc_call_done = nfs4_lock_done,
5690 .rpc_release = nfs4_lock_release,
5691};
5692
2bee72a6
TM		 5693static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5694{
2bee72a6
TM		 5695 switch (error) {
5696 case -NFS4ERR_ADMIN_REVOKED:
5697 case -NFS4ERR_BAD_STATEID:
ecac799a 5698 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5699 if (new_lock_owner != 0 ||
795a88c9 5700 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5701 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5702 break;
5703 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5704 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5705 case -NFS4ERR_EXPIRED:
5706 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5707 };
5708}
5709
afe6c27c 5710static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5711{
5712 struct nfs4_lockdata *data;
5713 struct rpc_task *task;
5138fde0
TM		 5714 struct rpc_message msg = {
5715 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5716 .rpc_cred = state->owner->so_cred,
5717 };
c970aa85
TM		 5718 struct rpc_task_setup task_setup_data = {
5719 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5720 .rpc_message = &msg,
c970aa85 5721 .callback_ops = &nfs4_lock_ops,
101070ca 5722 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5723 .flags = RPC_TASK_ASYNC,
5724 };
a5d16a4d
TM		 5725 int ret;
5726
3110ff80 5727 dprintk("%s: begin!\n", __func__);
cd3758e3 5728 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5729 fl->fl_u.nfs4_fl.owner,
5730 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5731 if (data == NULL)
5732 return -ENOMEM;
5733 if (IS_SETLKW(cmd))
5734 data->arg.block = 1;
a9c92d6b 5735 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5736 msg.rpc_argp = &data->arg;
5737 msg.rpc_resp = &data->res;
c970aa85 5738 task_setup_data.callback_data = data;
8fe72bac
TM		 5739 if (recovery_type > NFS_LOCK_NEW) {
5740 if (recovery_type == NFS_LOCK_RECLAIM)
5741 data->arg.reclaim = NFS_LOCK_RECLAIM;
5742 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 5743 } else
5744 data->arg.new_lock = 1;
c970aa85 5745 task = rpc_run_task(&task_setup_data);
7a1218a2 5746 if (IS_ERR(task))
a5d16a4d 5747 return PTR_ERR(task);
a5d16a4d
TM		 5748 ret = nfs4_wait_for_completion_rpc_task(task);
5749 if (ret == 0) {
5750 ret = data->rpc_status;
2bee72a6
TM		 5751 if (ret)
5752 nfs4_handle_setlk_error(data->server, data->lsp,
5753 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5754 } else
5755 data->cancelled = 1;
e6b3c4db 5756 rpc_put_task(task);
3110ff80 5757 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5758 return ret;
1da177e4
LT		 5759}
5760
5761static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5762{
202b50dc 5763 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5764 struct nfs4_exception exception = {
5765 .inode = state->inode,
5766 };
202b50dc
TM		 5767 int err;
5768
5769 do {
42a2d13e
TM		 5770 /* Cache the lock if possible... */
5771 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5772 return 0;
afe6c27c 5773 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5774 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5775 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5776 break;
5777 nfs4_handle_exception(server, err, &exception);
5778 } while (exception.retry);
5779 return err;
1da177e4
LT		 5780}
5781
5782static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5783{
202b50dc 5784 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5785 struct nfs4_exception exception = {
5786 .inode = state->inode,
5787 };
202b50dc
TM		 5788 int err;
5789
6bfc93ef
TM		 5790 err = nfs4_set_lock_state(state, request);
5791 if (err != 0)
5792 return err;
f6de7a39 5793 if (!recover_lost_locks) {
ef1820f9
N		 5794 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5795 return 0;
5796 }
202b50dc 5797 do {
42a2d13e
TM		 5798 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5799 return 0;
afe6c27c 5800 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5801 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5802 switch (err) {
5803 default:
5804 goto out;
5805 case -NFS4ERR_GRACE:
5806 case -NFS4ERR_DELAY:
5807 nfs4_handle_exception(server, err, &exception);
5808 err = 0;
5809 }
202b50dc 5810 } while (exception.retry);
a9ed2e25 5811out:
202b50dc 5812 return err;
1da177e4
LT		 5813}
5814
f062eb6c 5815#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5816/**
5817 * nfs41_check_expired_locks - possibly free a lock stateid
5818 *
5819 * @state: NFSv4 state for an inode
5820 *
5821 * Returns NFS_OK if recovery for this stateid is now finished.
5822 * Otherwise a negative NFS4ERR value is returned.
5823 */
b01dd1d8 5824static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5825{
eb64cf96 5826 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5827 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5828 struct nfs_server *server = NFS_SERVER(state->inode);
5829
b01dd1d8 5830 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5831 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5832 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5833
5834 status = nfs41_test_stateid(server,
5835 &lsp->ls_stateid,
5836 cred);
08cb47fa 5837 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5838 if (status != NFS_OK) {
3e60ffdd
CL		 5839 /* Free the stateid unless the server
5840 * informs us the stateid is unrecognized. */
89af2739
CL		 5841 if (status != -NFS4ERR_BAD_STATEID)
5842 nfs41_free_stateid(server,
ab7cb0df
TM		 5843 &lsp->ls_stateid,
5844 cred);
795a88c9 5845 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5846 ret = status;
5847 }
5848 }
5849 };
5850
5851 return ret;
5852}
5853
5854static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5855{
5856 int status = NFS_OK;
5857
5858 if (test_bit(LK_STATE_IN_USE, &state->flags))
5859 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5860 if (status != NFS_OK)
5861 status = nfs4_lock_expired(state, request);
5862 return status;
f062eb6c
BS		 5863}
5864#endif
5865
1da177e4
LT		 5866static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5867{
19e03c57 5868 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5869 unsigned char fl_flags = request->fl_flags;
8e469ebd 5870 int status = -ENOLCK;
1da177e4 5871
8e469ebd
TM		 5872 if ((fl_flags & FL_POSIX) &&
5873 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5874 goto out;
6bfc93ef 5875 /* Is this a delegated open? */
6bfc93ef
TM		 5876 status = nfs4_set_lock_state(state, request);
5877 if (status != 0)
5878 goto out;
01c3b861
TM		 5879 request->fl_flags |= FL_ACCESS;
5880 status = do_vfs_lock(request->fl_file, request);
5881 if (status < 0)
5882 goto out;
19e03c57 5883 down_read(&nfsi->rwsem);
01c3b861 5884 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5885 /* Yes: cache locks! */
01c3b861 5886 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5887 request->fl_flags = fl_flags & ~FL_SLEEP;
5888 status = do_vfs_lock(request->fl_file, request);
c69899a1 5889 up_read(&nfsi->rwsem);
9a99af49 5890 goto out;
9a99af49 5891 }
19e03c57 5892 up_read(&nfsi->rwsem);
c69899a1 5893 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 5894out:
5895 request->fl_flags = fl_flags;
1da177e4
LT		 5896 return status;
5897}
5898
5899static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5900{
a1d0b5ee
TM		 5901 struct nfs4_exception exception = {
5902 .state = state,
05ffe24f 5903 .inode = state->inode,
a1d0b5ee 5904 };
1da177e4
LT		 5905 int err;
5906
5907 do {
965b5d67 5908 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5909 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5910 if (err == -NFS4ERR_DENIED)
5911 err = -EAGAIN;
1da177e4 5912 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5913 err, &exception);
1da177e4
LT		 5914 } while (exception.retry);
5915 return err;
5916}
5917
5918static int
5919nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5920{
5921 struct nfs_open_context *ctx;
5922 struct nfs4_state *state;
5923 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5924 int status;
5925
5926 /* verify open state */
cd3758e3 5927 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5928 state = ctx->state;
5929
5930 if (request->fl_start < 0 || request->fl_end < 0)
5931 return -EINVAL;
5932
d953126a
TM		 5933 if (IS_GETLK(cmd)) {
5934 if (state != NULL)
5935 return nfs4_proc_getlk(state, F_GETLK, request);
5936 return 0;
5937 }
1da177e4
LT		 5938
5939 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5940 return -EINVAL;
5941
d953126a
TM		 5942 if (request->fl_type == F_UNLCK) {
5943 if (state != NULL)
5944 return nfs4_proc_unlck(state, cmd, request);
5945 return 0;
5946 }
1da177e4 5947
d953126a
TM		 5948 if (state == NULL)
5949 return -ENOLCK;
55725513
TM		 5950 /*
5951 * Don't rely on the VFS having checked the file open mode,
5952 * since it won't do this for flock() locks.
5953 */
f44106e2 5954 switch (request->fl_type) {
55725513
TM		 5955 case F_RDLCK:
5956 if (!(filp->f_mode & FMODE_READ))
5957 return -EBADF;
5958 break;
5959 case F_WRLCK:
5960 if (!(filp->f_mode & FMODE_WRITE))
5961 return -EBADF;
5962 }
5963
1da177e4
LT		 5964 do {
5965 status = nfs4_proc_setlk(state, cmd, request);
5966 if ((status != -EAGAIN) || IS_SETLK(cmd))
5967 break;
5968 timeout = nfs4_set_lock_task_retry(timeout);
5969 status = -ERESTARTSYS;
5970 if (signalled())
5971 break;
5972 } while(status < 0);
1da177e4
LT		 5973 return status;
5974}
5975
db4f2e63 5976int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5977{
5978 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5979 int err;
5980
5981 err = nfs4_set_lock_state(state, fl);
5982 if (err != 0)
db4f2e63 5983 return err;
4a706fa0 5984 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5985 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5986}
6b3b5496 5987
cf470c3e
TM		 5988struct nfs_release_lockowner_data {
5989 struct nfs4_lock_state *lsp;
5ae67c4f 5990 struct nfs_server *server;
cf470c3e 5991 struct nfs_release_lockowner_args args;
b7e63a10 5992 struct nfs_release_lockowner_res res;
60ea6812 5993 unsigned long timestamp;
cf470c3e
TM		 5994};
5995
fbd4bfd1
CL		 5996static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5997{
5998 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 5999 struct nfs_server *server = data->server;
cb04ad2a
PT		 6000 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6001 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6002 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6003 data->timestamp = jiffies;
fbd4bfd1
CL		 6004}
6005
6006static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6007{
6008 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6009 struct nfs_server *server = data->server;
6010
b7e63a10 6011 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6012
6013 switch (task->tk_status) {
6014 case 0:
6015 renew_lease(server, data->timestamp);
6016 break;
6017 case -NFS4ERR_STALE_CLIENTID:
6018 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6019 nfs4_schedule_lease_recovery(server->nfs_client);
6020 break;
60ea6812
CL		 6021 case -NFS4ERR_LEASE_MOVED:
6022 case -NFS4ERR_DELAY:
8478eaa1
N		 6023 if (nfs4_async_handle_error(task, server,
6024 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6025 rpc_restart_call_prepare(task);
6026 }
fbd4bfd1
CL		 6027}
6028
d3c7b7cc
TM		 6029static void nfs4_release_lockowner_release(void *calldata)
6030{
cf470c3e 6031 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6032 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6033 kfree(calldata);
6034}
6035
17280175 6036static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6037 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6038 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6039 .rpc_release = nfs4_release_lockowner_release,
6040};
6041
f1cdae87
JL		 6042static void
6043nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6044{
cf470c3e 6045 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6046 struct rpc_message msg = {
6047 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6048 };
6049
6050 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6051 return;
fbd4bfd1 6052
cf470c3e
TM		 6053 data = kmalloc(sizeof(*data), GFP_NOFS);
6054 if (!data)
f1cdae87 6055 return;
cf470c3e 6056 data->lsp = lsp;
5ae67c4f 6057 data->server = server;
cf470c3e
TM		 6058 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6059 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6060 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6061
cf470c3e 6062 msg.rpc_argp = &data->args;
b7e63a10
TM		 6063 msg.rpc_resp = &data->res;
6064 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6065 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6066}
6067
aa1870af
BF		 6068#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6069
64c2ce8b
AK		 6070static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6071 const void *buf, size_t buflen,
6072 int flags, int type)
6b3b5496 6073{
64c2ce8b
AK		 6074 if (strcmp(key, "") != 0)
6075 return -EINVAL;
4b580ee3 6076
64c2ce8b 6077 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6078}
6079
64c2ce8b
AK		 6080static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6081 void *buf, size_t buflen, int type)
6b3b5496 6082{
64c2ce8b
AK		 6083 if (strcmp(key, "") != 0)
6084 return -EINVAL;
aa1870af 6085
64c2ce8b 6086 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6087}
6088
64c2ce8b
AK		 6089static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6090 size_t list_len, const char *name,
6091 size_t name_len, int type)
6b3b5496 6092{
64c2ce8b 6093 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6094
096455a2
BF		 6095 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
6096 return 0;
64c2ce8b
AK		 6097
6098 if (list && len <= list_len)
6099 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6100 return len;
6b3b5496
BF		 6101}
6102
c9bccef6
DQ		 6103#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6104static inline int nfs4_server_supports_labels(struct nfs_server *server)
6105{
6106 return server->caps & NFS_CAP_SECURITY_LABEL;
6107}
6108
6109static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6110 const void *buf, size_t buflen,
6111 int flags, int type)
6112{
6113 if (security_ismaclabel(key))
6114 return nfs4_set_security_label(dentry, buf, buflen);
6115
6116 return -EOPNOTSUPP;
6117}
6118
6119static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6120 void *buf, size_t buflen, int type)
6121{
6122 if (security_ismaclabel(key))
6123 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
6124 return -EOPNOTSUPP;
6125}
6126
6127static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6128 size_t list_len, const char *name,
6129 size_t name_len, int type)
6130{
6131 size_t len = 0;
6132
6133 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
6134 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
6135 if (list && len <= list_len)
6136 security_inode_listsecurity(dentry->d_inode, list, len);
6137 }
6138 return len;
6139}
6140
6141static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6142 .prefix = XATTR_SECURITY_PREFIX,
6143 .list = nfs4_xattr_list_nfs4_label,
6144 .get = nfs4_xattr_get_nfs4_label,
6145 .set = nfs4_xattr_set_nfs4_label,
6146};
6147#endif
6148
6149
533eb461
AA		 6150/*
6151 * nfs_fhget will use either the mounted_on_fileid or the fileid
6152 */
69aaaae1
TM		 6153static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6154{
533eb461
AA		 6155 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6156 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6157 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6158 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6159 return;
6160
6161 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6162 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6163 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6164 fattr->nlink = 2;
6165}
6166
f05d147f
BS		 6167static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6168 const struct qstr *name,
6169 struct nfs4_fs_locations *fs_locations,
6170 struct page *page)
683b57b4
TM		 6171{
6172 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6173 u32 bitmask[3] = {
361e624f 6174 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6175 };
6176 struct nfs4_fs_locations_arg args = {
6177 .dir_fh = NFS_FH(dir),
c228fd3a 6178 .name = name,
683b57b4
TM		 6179 .page = page,
6180 .bitmask = bitmask,
6181 };
22958463
BH		 6182 struct nfs4_fs_locations_res res = {
6183 .fs_locations = fs_locations,
6184 };
683b57b4
TM		 6185 struct rpc_message msg = {
6186 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6187 .rpc_argp = &args,
22958463 6188 .rpc_resp = &res,
683b57b4
TM		 6189 };
6190 int status;
6191
3110ff80 6192 dprintk("%s: start\n", __func__);
533eb461
AA		 6193
6194 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6195 * is not supported */
6196 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6197 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6198 else
6199 bitmask[0] |= FATTR4_WORD0_FILEID;
6200
c228fd3a 6201 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6202 fs_locations->server = server;
830b8e33 6203 fs_locations->nlocations = 0;
f05d147f 6204 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6205 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6206 return status;
6207}
6208
f05d147f
BS		 6209int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6210 const struct qstr *name,
6211 struct nfs4_fs_locations *fs_locations,
6212 struct page *page)
db0a9593
BS		 6213{
6214 struct nfs4_exception exception = { };
6215 int err;
6216 do {
078ea3df
TM		 6217 err = _nfs4_proc_fs_locations(client, dir, name,
6218 fs_locations, page);
6219 trace_nfs4_get_fs_locations(dir, name, err);
6220 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6221 &exception);
6222 } while (exception.retry);
6223 return err;
6224}
6225
b03d735b
CL		 6226/*
6227 * This operation also signals the server that this client is
6228 * performing migration recovery. The server can stop returning
6229 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6230 * appended to this compound to identify the client ID which is
6231 * performing recovery.
6232 */
6233static int _nfs40_proc_get_locations(struct inode *inode,
6234 struct nfs4_fs_locations *locations,
6235 struct page *page, struct rpc_cred *cred)
6236{
6237 struct nfs_server *server = NFS_SERVER(inode);
6238 struct rpc_clnt *clnt = server->client;
6239 u32 bitmask[2] = {
6240 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6241 };
6242 struct nfs4_fs_locations_arg args = {
6243 .clientid = server->nfs_client->cl_clientid,
6244 .fh = NFS_FH(inode),
6245 .page = page,
6246 .bitmask = bitmask,
6247 .migration = 1, /* skip LOOKUP */
6248 .renew = 1, /* append RENEW */
6249 };
6250 struct nfs4_fs_locations_res res = {
6251 .fs_locations = locations,
6252 .migration = 1,
6253 .renew = 1,
6254 };
6255 struct rpc_message msg = {
6256 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6257 .rpc_argp = &args,
6258 .rpc_resp = &res,
6259 .rpc_cred = cred,
6260 };
6261 unsigned long now = jiffies;
6262 int status;
6263
6264 nfs_fattr_init(&locations->fattr);
6265 locations->server = server;
6266 locations->nlocations = 0;
6267
6268 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6269 nfs4_set_sequence_privileged(&args.seq_args);
6270 status = nfs4_call_sync_sequence(clnt, server, &msg,
6271 &args.seq_args, &res.seq_res);
6272 if (status)
6273 return status;
6274
6275 renew_lease(server, now);
6276 return 0;
6277}
6278
6279#ifdef CONFIG_NFS_V4_1
6280
6281/*
6282 * This operation also signals the server that this client is
6283 * performing migration recovery. The server can stop asserting
6284 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6285 * performing this operation is identified in the SEQUENCE
6286 * operation in this compound.
6287 *
6288 * When the client supports GETATTR(fs_locations_info), it can
6289 * be plumbed in here.
6290 */
6291static int _nfs41_proc_get_locations(struct inode *inode,
6292 struct nfs4_fs_locations *locations,
6293 struct page *page, struct rpc_cred *cred)
6294{
6295 struct nfs_server *server = NFS_SERVER(inode);
6296 struct rpc_clnt *clnt = server->client;
6297 u32 bitmask[2] = {
6298 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6299 };
6300 struct nfs4_fs_locations_arg args = {
6301 .fh = NFS_FH(inode),
6302 .page = page,
6303 .bitmask = bitmask,
6304 .migration = 1, /* skip LOOKUP */
6305 };
6306 struct nfs4_fs_locations_res res = {
6307 .fs_locations = locations,
6308 .migration = 1,
6309 };
6310 struct rpc_message msg = {
6311 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6312 .rpc_argp = &args,
6313 .rpc_resp = &res,
6314 .rpc_cred = cred,
6315 };
6316 int status;
6317
6318 nfs_fattr_init(&locations->fattr);
6319 locations->server = server;
6320 locations->nlocations = 0;
6321
6322 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6323 nfs4_set_sequence_privileged(&args.seq_args);
6324 status = nfs4_call_sync_sequence(clnt, server, &msg,
6325 &args.seq_args, &res.seq_res);
6326 if (status == NFS4_OK &&
6327 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6328 status = -NFS4ERR_LEASE_MOVED;
6329 return status;
6330}
6331
6332#endif /* CONFIG_NFS_V4_1 */
6333
6334/**
6335 * nfs4_proc_get_locations - discover locations for a migrated FSID
6336 * @inode: inode on FSID that is migrating
6337 * @locations: result of query
6338 * @page: buffer
6339 * @cred: credential to use for this operation
6340 *
6341 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6342 * operation failed, or a negative errno if a local error occurred.
6343 *
6344 * On success, "locations" is filled in, but if the server has
6345 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6346 * asserted.
6347 *
6348 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6349 * from this client that require migration recovery.
6350 */
6351int nfs4_proc_get_locations(struct inode *inode,
6352 struct nfs4_fs_locations *locations,
6353 struct page *page, struct rpc_cred *cred)
6354{
6355 struct nfs_server *server = NFS_SERVER(inode);
6356 struct nfs_client *clp = server->nfs_client;
6357 const struct nfs4_mig_recovery_ops *ops =
6358 clp->cl_mvops->mig_recovery_ops;
6359 struct nfs4_exception exception = { };
6360 int status;
6361
6362 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6363 (unsigned long long)server->fsid.major,
6364 (unsigned long long)server->fsid.minor,
6365 clp->cl_hostname);
6366 nfs_display_fhandle(NFS_FH(inode), __func__);
6367
6368 do {
6369 status = ops->get_locations(inode, locations, page, cred);
6370 if (status != -NFS4ERR_DELAY)
6371 break;
6372 nfs4_handle_exception(server, status, &exception);
6373 } while (exception.retry);
6374 return status;
6375}
6376
44c99933
CL		 6377/*
6378 * This operation also signals the server that this client is
6379 * performing "lease moved" recovery. The server can stop
6380 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6381 * is appended to this compound to identify the client ID which is
6382 * performing recovery.
6383 */
6384static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6385{
6386 struct nfs_server *server = NFS_SERVER(inode);
6387 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6388 struct rpc_clnt *clnt = server->client;
6389 struct nfs4_fsid_present_arg args = {
6390 .fh = NFS_FH(inode),
6391 .clientid = clp->cl_clientid,
6392 .renew = 1, /* append RENEW */
6393 };
6394 struct nfs4_fsid_present_res res = {
6395 .renew = 1,
6396 };
6397 struct rpc_message msg = {
6398 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6399 .rpc_argp = &args,
6400 .rpc_resp = &res,
6401 .rpc_cred = cred,
6402 };
6403 unsigned long now = jiffies;
6404 int status;
6405
6406 res.fh = nfs_alloc_fhandle();
6407 if (res.fh == NULL)
6408 return -ENOMEM;
6409
6410 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6411 nfs4_set_sequence_privileged(&args.seq_args);
6412 status = nfs4_call_sync_sequence(clnt, server, &msg,
6413 &args.seq_args, &res.seq_res);
6414 nfs_free_fhandle(res.fh);
6415 if (status)
6416 return status;
6417
6418 do_renew_lease(clp, now);
6419 return 0;
6420}
6421
6422#ifdef CONFIG_NFS_V4_1
6423
6424/*
6425 * This operation also signals the server that this client is
6426 * performing "lease moved" recovery. The server can stop asserting
6427 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6428 * this operation is identified in the SEQUENCE operation in this
6429 * compound.
6430 */
6431static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6432{
6433 struct nfs_server *server = NFS_SERVER(inode);
6434 struct rpc_clnt *clnt = server->client;
6435 struct nfs4_fsid_present_arg args = {
6436 .fh = NFS_FH(inode),
6437 };
6438 struct nfs4_fsid_present_res res = {
6439 };
6440 struct rpc_message msg = {
6441 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6442 .rpc_argp = &args,
6443 .rpc_resp = &res,
6444 .rpc_cred = cred,
6445 };
6446 int status;
6447
6448 res.fh = nfs_alloc_fhandle();
6449 if (res.fh == NULL)
6450 return -ENOMEM;
6451
6452 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6453 nfs4_set_sequence_privileged(&args.seq_args);
6454 status = nfs4_call_sync_sequence(clnt, server, &msg,
6455 &args.seq_args, &res.seq_res);
6456 nfs_free_fhandle(res.fh);
6457 if (status == NFS4_OK &&
6458 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6459 status = -NFS4ERR_LEASE_MOVED;
6460 return status;
6461}
6462
6463#endif /* CONFIG_NFS_V4_1 */
6464
6465/**
6466 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6467 * @inode: inode on FSID to check
6468 * @cred: credential to use for this operation
6469 *
6470 * Server indicates whether the FSID is present, moved, or not
6471 * recognized. This operation is necessary to clear a LEASE_MOVED
6472 * condition for this client ID.
6473 *
6474 * Returns NFS4_OK if the FSID is present on this server,
6475 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6476 * NFS4ERR code if some error occurred on the server, or a
6477 * negative errno if a local failure occurred.
6478 */
6479int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6480{
6481 struct nfs_server *server = NFS_SERVER(inode);
6482 struct nfs_client *clp = server->nfs_client;
6483 const struct nfs4_mig_recovery_ops *ops =
6484 clp->cl_mvops->mig_recovery_ops;
6485 struct nfs4_exception exception = { };
6486 int status;
6487
6488 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6489 (unsigned long long)server->fsid.major,
6490 (unsigned long long)server->fsid.minor,
6491 clp->cl_hostname);
6492 nfs_display_fhandle(NFS_FH(inode), __func__);
6493
6494 do {
6495 status = ops->fsid_present(inode, cred);
6496 if (status != -NFS4ERR_DELAY)
6497 break;
6498 nfs4_handle_exception(server, status, &exception);
6499 } while (exception.retry);
6500 return status;
6501}
6502
5ec16a85 6503/**
a5250def
WAA		 6504 * If 'use_integrity' is true and the state managment nfs_client
6505 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6506 * and the machine credential as per RFC3530bis and RFC5661 Security
6507 * Considerations sections. Otherwise, just use the user cred with the
6508 * filesystem's rpc_client.
5ec16a85 6509 */
a5250def 6510static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6511{
6512 int status;
6513 struct nfs4_secinfo_arg args = {
6514 .dir_fh = NFS_FH(dir),
6515 .name = name,
6516 };
6517 struct nfs4_secinfo_res res = {
6518 .flavors = flavors,
6519 };
6520 struct rpc_message msg = {
6521 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6522 .rpc_argp = &args,
6523 .rpc_resp = &res,
6524 };
a5250def 6525 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6526 struct rpc_cred *cred = NULL;
a5250def
WAA		 6527
6528 if (use_integrity) {
6529 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6530 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6531 msg.rpc_cred = cred;
a5250def 6532 }
5a5ea0d4
BS		 6533
6534 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6535
6536 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6537 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6538
a5250def
WAA		 6539 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6540 &res.seq_res, 0);
5a5ea0d4 6541 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6542
7cb852df
WAA		 6543 if (cred)
6544 put_rpccred(cred);
a5250def 6545
5a5ea0d4
BS		 6546 return status;
6547}
6548
72de53ec
BS		 6549int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6550 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6551{
6552 struct nfs4_exception exception = { };
6553 int err;
6554 do {
a5250def
WAA		 6555 err = -NFS4ERR_WRONGSEC;
6556
6557 /* try to use integrity protection with machine cred */
6558 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6559 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6560
6561 /*
6562 * if unable to use integrity protection, or SECINFO with
6563 * integrity protection returns NFS4ERR_WRONGSEC (which is
6564 * disallowed by spec, but exists in deployed servers) use
6565 * the current filesystem's rpc_client and the user cred.
6566 */
6567 if (err == -NFS4ERR_WRONGSEC)
6568 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6569
078ea3df
TM		 6570 trace_nfs4_secinfo(dir, name, err);
6571 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6572 &exception);
6573 } while (exception.retry);
6574 return err;
6575}
6576
557134a3 6577#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6578/*
6579 * Check the exchange flags returned by the server for invalid flags, having
6580 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6581 * DS flags set.
6582 */
6583static int nfs4_check_cl_exchange_flags(u32 flags)
6584{
6585 if (flags & ~EXCHGID4_FLAG_MASK_R)
6586 goto out_inval;
6587 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6588 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6589 goto out_inval;
6590 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6591 goto out_inval;
6592 return NFS_OK;
6593out_inval:
6594 return -NFS4ERR_INVAL;
6595}
6596
78fe0f41 6597static bool
79d4e1f0
CL		 6598nfs41_same_server_scope(struct nfs41_server_scope *a,
6599 struct nfs41_server_scope *b)
78fe0f41
WAA		 6600{
6601 if (a->server_scope_sz == b->server_scope_sz &&
6602 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6603 return true;
6604
6605 return false;
6606}
6607
7c44f1ae
WAA		 6608/*
6609 * nfs4_proc_bind_conn_to_session()
6610 *
6611 * The 4.1 client currently uses the same TCP connection for the
6612 * fore and backchannel.
6613 */
2cf047c9 6614int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6615{
6616 int status;
6617 struct nfs41_bind_conn_to_session_res res;
6618 struct rpc_message msg = {
6619 .rpc_proc =
6620 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6621 .rpc_argp = clp,
6622 .rpc_resp = &res,
2cf047c9 6623 .rpc_cred = cred,
7c44f1ae
WAA		 6624 };
6625
6626 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 6627
6628 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6629 if (unlikely(res.session == NULL)) {
6630 status = -ENOMEM;
6631 goto out;
6632 }
6633
6634 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6635 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 6636 if (status == 0) {
6637 if (memcmp(res.session->sess_id.data,
6638 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6639 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6640 status = -EIO;
6641 goto out_session;
6642 }
6643 if (res.dir != NFS4_CDFS4_BOTH) {
6644 dprintk("NFS: %s: Unexpected direction from server\n",
6645 __func__);
6646 status = -EIO;
6647 goto out_session;
6648 }
6649 if (res.use_conn_in_rdma_mode) {
6650 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6651 __func__);
6652 status = -EIO;
6653 goto out_session;
6654 }
6655 }
6656out_session:
6657 kfree(res.session);
6658out:
6659 dprintk("<-- %s status= %d\n", __func__, status);
6660 return status;
6661}
6662
99fe60d0 6663/*
fa940720
WAA		 6664 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6665 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6666 */
6667static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6668 .how = SP4_MACH_CRED,
6669 .enforce.u.words = {
6670 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6671 1 << (OP_EXCHANGE_ID - 32) |
6672 1 << (OP_CREATE_SESSION - 32) |
6673 1 << (OP_DESTROY_SESSION - 32) |
6674 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6675 },
6676 .allow.u.words = {
6677 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6678 1 << (OP_LOCKU) |
6679 1 << (OP_COMMIT),
8b5bee2e 6680 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6681 1 << (OP_SECINFO_NO_NAME - 32) |
6682 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6683 1 << (OP_FREE_STATEID - 32) |
6684 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6685 }
6686};
6687
6688/*
6689 * Select the state protection mode for client `clp' given the server results
6690 * from exchange_id in `sp'.
99fe60d0 6691 *
2031cd1a
WAA		 6692 * Returns 0 on success, negative errno otherwise.
6693 */
6694static int nfs4_sp4_select_mode(struct nfs_client *clp,
6695 struct nfs41_state_protection *sp)
6696{
6697 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6698 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6699 1 << (OP_EXCHANGE_ID - 32) |
6700 1 << (OP_CREATE_SESSION - 32) |
6701 1 << (OP_DESTROY_SESSION - 32) |
6702 1 << (OP_DESTROY_CLIENTID - 32)
6703 };
6704 unsigned int i;
6705
6706 if (sp->how == SP4_MACH_CRED) {
6707 /* Print state protect result */
6708 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6709 for (i = 0; i <= LAST_NFS4_OP; i++) {
6710 if (test_bit(i, sp->enforce.u.longs))
6711 dfprintk(MOUNT, " enforce op %d\n", i);
6712 if (test_bit(i, sp->allow.u.longs))
6713 dfprintk(MOUNT, " allow op %d\n", i);
6714 }
6715
6716 /* make sure nothing is on enforce list that isn't supported */
6717 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6718 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6719 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6720 return -EINVAL;
6721 }
6722 }
6723
6724 /*
6725 * Minimal mode - state operations are allowed to use machine
6726 * credential. Note this already happens by default, so the
6727 * client doesn't have to do anything more than the negotiation.
6728 *
6729 * NOTE: we don't care if EXCHANGE_ID is in the list -
6730 * we're already using the machine cred for exchange_id
6731 * and will never use a different cred.
6732 */
6733 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6734 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6735 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6736 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6737 dfprintk(MOUNT, "sp4_mach_cred:\n");
6738 dfprintk(MOUNT, " minimal mode enabled\n");
6739 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6740 } else {
6741 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6742 return -EINVAL;
6743 }
fa940720
WAA		 6744
6745 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6746 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6747 dfprintk(MOUNT, " cleanup mode enabled\n");
6748 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6749 }
8b5bee2e
WAA		 6750
6751 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6752 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6753 dfprintk(MOUNT, " secinfo mode enabled\n");
6754 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6755 }
3787d506
WAA		 6756
6757 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6758 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6759 dfprintk(MOUNT, " stateid mode enabled\n");
6760 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6761 }
8c21c62c
WAA		 6762
6763 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6764 dfprintk(MOUNT, " write mode enabled\n");
6765 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6766 }
6767
6768 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6769 dfprintk(MOUNT, " commit mode enabled\n");
6770 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6771 }
2031cd1a
WAA		 6772 }
6773
6774 return 0;
6775}
6776
6777/*
6778 * _nfs4_proc_exchange_id()
6bbb4ae8 6779 *
2031cd1a 6780 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6781 */
2031cd1a
WAA		 6782static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6783 u32 sp4_how)
99fe60d0
BH		 6784{
6785 nfs4_verifier verifier;
6786 struct nfs41_exchange_id_args args = {
cd93710e 6787 .verifier = &verifier,
99fe60d0 6788 .client = clp,
cd3fadec 6789#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6790 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6791 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6792 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6793#else
6794 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6795 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6796#endif
99fe60d0
BH		 6797 };
6798 struct nfs41_exchange_id_res res = {
32b01310 6799 0
99fe60d0
BH		 6800 };
6801 int status;
6802 struct rpc_message msg = {
6803 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6804 .rpc_argp = &args,
6805 .rpc_resp = &res,
6806 .rpc_cred = cred,
6807 };
99fe60d0 6808
f092075d 6809 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6810 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6811 sizeof(args.id));
6bbb4ae8
CL		 6812 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6813 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6814 args.id_len, args.id);
99fe60d0 6815
acdeb69d 6816 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6817 GFP_NOFS);
acdeb69d 6818 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6819 status = -ENOMEM;
6820 goto out;
6821 }
78fe0f41 6822
79d4e1f0 6823 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6824 GFP_NOFS);
177313f1 6825 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6826 status = -ENOMEM;
acdeb69d 6827 goto out_server_owner;
abe9a6d5 6828 }
78fe0f41 6829
bbafffd2 6830 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6831 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6832 status = -ENOMEM;
6833 goto out_server_scope;
6834 }
6835
2031cd1a
WAA		 6836 switch (sp4_how) {
6837 case SP4_NONE:
6838 args.state_protect.how = SP4_NONE;
6839 break;
6840
6841 case SP4_MACH_CRED:
6842 args.state_protect = nfs4_sp4_mach_cred_request;
6843 break;
6844
6845 default:
6846 /* unsupported! */
6847 WARN_ON_ONCE(1);
6848 status = -EINVAL;
6849 goto out_server_scope;
6850 }
6851
1bd714f2 6852 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6853 trace_nfs4_exchange_id(clp, status);
177313f1 6854 if (status == 0)
32b01310 6855 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6856
2031cd1a
WAA		 6857 if (status == 0)
6858 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6859
acdeb69d 6860 if (status == 0) {
32b01310
TM		 6861 clp->cl_clientid = res.clientid;
6862 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6863 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6864 clp->cl_seqid = res.seqid;
6865
acdeb69d
CL		 6866 kfree(clp->cl_serverowner);
6867 clp->cl_serverowner = res.server_owner;
6868 res.server_owner = NULL;
78fe0f41 6869
7d2ed9ac 6870 /* use the most recent implementation id */
59155546
CL		 6871 kfree(clp->cl_implid);
6872 clp->cl_implid = res.impl_id;
7d2ed9ac 6873
177313f1 6874 if (clp->cl_serverscope != NULL &&
79d4e1f0 6875 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6876 res.server_scope)) {
6877 dprintk("%s: server_scope mismatch detected\n",
6878 __func__);
6879 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6880 kfree(clp->cl_serverscope);
6881 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6882 }
6883
177313f1 6884 if (clp->cl_serverscope == NULL) {
79d4e1f0 6885 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6886 goto out;
6887 }
32b01310
TM		 6888 } else
6889 kfree(res.impl_id);
7d2ed9ac 6890
acdeb69d
CL		 6891out_server_owner:
6892 kfree(res.server_owner);
7d2ed9ac 6893out_server_scope:
abe9a6d5
WAA		 6894 kfree(res.server_scope);
6895out:
177313f1 6896 if (clp->cl_implid != NULL)
6bbb4ae8 6897 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6898 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6899 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6900 clp->cl_implid->date.seconds,
6901 clp->cl_implid->date.nseconds);
6bbb4ae8 6902 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6903 return status;
6904}
6905
2031cd1a
WAA		 6906/*
6907 * nfs4_proc_exchange_id()
6908 *
6909 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6910 *
6911 * Since the clientid has expired, all compounds using sessions
6912 * associated with the stale clientid will be returning
6913 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6914 * be in some phase of session reset.
6915 *
6916 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6917 */
6918int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6919{
6920 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6921 int status;
6922
6923 /* try SP4_MACH_CRED if krb5i/p */
6924 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6925 authflavor == RPC_AUTH_GSS_KRB5P) {
6926 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6927 if (!status)
6928 return 0;
6929 }
6930
6931 /* try SP4_NONE */
6932 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6933}
6934
66245539
TM		 6935static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6936 struct rpc_cred *cred)
6937{
6938 struct rpc_message msg = {
6939 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6940 .rpc_argp = clp,
6941 .rpc_cred = cred,
6942 };
6943 int status;
6944
6945 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6946 trace_nfs4_destroy_clientid(clp, status);
66245539 6947 if (status)
02c67525 6948 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6949 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6950 return status;
6951}
6952
6953static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6954 struct rpc_cred *cred)
6955{
6956 unsigned int loop;
6957 int ret;
6958
6959 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6960 ret = _nfs4_proc_destroy_clientid(clp, cred);
6961 switch (ret) {
6962 case -NFS4ERR_DELAY:
6963 case -NFS4ERR_CLIENTID_BUSY:
6964 ssleep(1);
6965 break;
6966 default:
6967 return ret;
6968 }
6969 }
6970 return 0;
6971}
6972
6973int nfs4_destroy_clientid(struct nfs_client *clp)
6974{
6975 struct rpc_cred *cred;
6976 int ret = 0;
6977
6978 if (clp->cl_mvops->minor_version < 1)
6979 goto out;
6980 if (clp->cl_exchange_flags == 0)
6981 goto out;
05f4c350
CL		 6982 if (clp->cl_preserve_clid)
6983 goto out;
73d8bde5 6984 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6985 ret = nfs4_proc_destroy_clientid(clp, cred);
6986 if (cred)
6987 put_rpccred(cred);
6988 switch (ret) {
6989 case 0:
6990 case -NFS4ERR_STALE_CLIENTID:
6991 clp->cl_exchange_flags = 0;
6992 }
6993out:
6994 return ret;
6995}
6996
2050f0cc
AA		 6997struct nfs4_get_lease_time_data {
6998 struct nfs4_get_lease_time_args *args;
6999 struct nfs4_get_lease_time_res *res;
7000 struct nfs_client *clp;
7001};
7002
7003static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7004 void *calldata)
7005{
2050f0cc
AA		 7006 struct nfs4_get_lease_time_data *data =
7007 (struct nfs4_get_lease_time_data *)calldata;
7008
7009 dprintk("--> %s\n", __func__);
7010 /* just setup sequence, do not trigger session recovery
7011 since we're invoked within one */
d9afbd1b
TM		 7012 nfs41_setup_sequence(data->clp->cl_session,
7013 &data->args->la_seq_args,
7014 &data->res->lr_seq_res,
7015 task);
2050f0cc
AA		 7016 dprintk("<-- %s\n", __func__);
7017}
7018
7019/*
7020 * Called from nfs4_state_manager thread for session setup, so don't recover
7021 * from sequence operation or clientid errors.
7022 */
7023static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7024{
7025 struct nfs4_get_lease_time_data *data =
7026 (struct nfs4_get_lease_time_data *)calldata;
7027
7028 dprintk("--> %s\n", __func__);
14516c3a
TM		 7029 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7030 return;
2050f0cc
AA		 7031 switch (task->tk_status) {
7032 case -NFS4ERR_DELAY:
7033 case -NFS4ERR_GRACE:
7034 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7035 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7036 task->tk_status = 0;
a8a4ae3a
AA		 7037 /* fall through */
7038 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7039 rpc_restart_call_prepare(task);
2050f0cc
AA		 7040 return;
7041 }
2050f0cc
AA		 7042 dprintk("<-- %s\n", __func__);
7043}
7044
17280175 7045static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7046 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7047 .rpc_call_done = nfs4_get_lease_time_done,
7048};
7049
7050int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7051{
7052 struct rpc_task *task;
7053 struct nfs4_get_lease_time_args args;
7054 struct nfs4_get_lease_time_res res = {
7055 .lr_fsinfo = fsinfo,
7056 };
7057 struct nfs4_get_lease_time_data data = {
7058 .args = &args,
7059 .res = &res,
7060 .clp = clp,
7061 };
7062 struct rpc_message msg = {
7063 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7064 .rpc_argp = &args,
7065 .rpc_resp = &res,
7066 };
7067 struct rpc_task_setup task_setup = {
7068 .rpc_client = clp->cl_rpcclient,
7069 .rpc_message = &msg,
7070 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7071 .callback_data = &data,
7072 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7073 };
7074 int status;
7075
a9c92d6b 7076 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7077 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7078 dprintk("--> %s\n", __func__);
7079 task = rpc_run_task(&task_setup);
7080
7081 if (IS_ERR(task))
7082 status = PTR_ERR(task);
7083 else {
7084 status = task->tk_status;
7085 rpc_put_task(task);
7086 }
7087 dprintk("<-- %s return %d\n", __func__, status);
7088
7089 return status;
7090}
7091
fc931582
AA		 7092/*
7093 * Initialize the values to be used by the client in CREATE_SESSION
7094 * If nfs4_init_session set the fore channel request and response sizes,
7095 * use them.
7096 *
7097 * Set the back channel max_resp_sz_cached to zero to force the client to
7098 * always set csa_cachethis to FALSE because the current implementation
7099 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7100 */
7101static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7102{
18aad3d5
AA		 7103 unsigned int max_rqst_sz, max_resp_sz;
7104
7105 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7106 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7107
fc931582 7108 /* Fore channel attributes */
18aad3d5
AA		 7109 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7110 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7111 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7112 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7113
7114 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7115 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7116 __func__,
7117 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7118 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7119
7120 /* Back channel attributes */
fc931582
AA		 7121 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7122 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7123 args->bc_attrs.max_resp_sz_cached = 0;
7124 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7125 args->bc_attrs.max_reqs = 1;
7126
7127 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7128 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7129 __func__,
7130 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7131 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7132 args->bc_attrs.max_reqs);
7133}
7134
43c2e885 7135static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 7136{
43c2e885
BF		 7137 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7138 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
7139
43c2e885
BF		 7140 if (rcvd->max_resp_sz > sent->max_resp_sz)
7141 return -EINVAL;
7142 /*
7143 * Our requested max_ops is the minimum we need; we're not
7144 * prepared to break up compounds into smaller pieces than that.
7145 * So, no point even trying to continue if the server won't
7146 * cooperate:
7147 */
7148 if (rcvd->max_ops < sent->max_ops)
7149 return -EINVAL;
7150 if (rcvd->max_reqs == 0)
7151 return -EINVAL;
b4b9a0c1
VG		 7152 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7153 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7154 return 0;
8d35301d
AA		 7155}
7156
43c2e885
BF		 7157static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
7158{
7159 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7160 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 7161
43c2e885
BF		 7162 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7163 return -EINVAL;
7164 if (rcvd->max_resp_sz < sent->max_resp_sz)
7165 return -EINVAL;
7166 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7167 return -EINVAL;
7168 /* These would render the backchannel useless: */
b4b9a0c1 7169 if (rcvd->max_ops != sent->max_ops)
43c2e885 7170 return -EINVAL;
b4b9a0c1 7171 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 7172 return -EINVAL;
7173 return 0;
7174}
8d35301d 7175
8d35301d
AA		 7176static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7177 struct nfs4_session *session)
7178{
43c2e885 7179 int ret;
8d35301d 7180
43c2e885
BF		 7181 ret = nfs4_verify_fore_channel_attrs(args, session);
7182 if (ret)
7183 return ret;
7184 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 7185}
7186
848f5bda
TM		 7187static int _nfs4_proc_create_session(struct nfs_client *clp,
7188 struct rpc_cred *cred)
fc931582
AA		 7189{
7190 struct nfs4_session *session = clp->cl_session;
7191 struct nfs41_create_session_args args = {
7192 .client = clp,
7193 .cb_program = NFS4_CALLBACK,
7194 };
7195 struct nfs41_create_session_res res = {
7196 .client = clp,
7197 };
7198 struct rpc_message msg = {
7199 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7200 .rpc_argp = &args,
7201 .rpc_resp = &res,
848f5bda 7202 .rpc_cred = cred,
fc931582
AA		 7203 };
7204 int status;
7205
7206 nfs4_init_channel_attrs(&args);
0f91421e 7207 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7208
1bd714f2 7209 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7210 trace_nfs4_create_session(clp, status);
fc931582 7211
43095d39 7212 if (!status) {
8d35301d
AA		 7213 /* Verify the session's negotiated channel_attrs values */
7214 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 7215 /* Increment the clientid slot sequence id */
7216 clp->cl_seqid++;
7217 }
7218
7219 return status;
7220}
7221
7222/*
7223 * Issues a CREATE_SESSION operation to the server.
7224 * It is the responsibility of the caller to verify the session is
7225 * expired before calling this routine.
7226 */
848f5bda 7227int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7228{
7229 int status;
7230 unsigned *ptr;
fc931582
AA		 7231 struct nfs4_session *session = clp->cl_session;
7232
7233 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7234
848f5bda 7235 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7236 if (status)
7237 goto out;
7238
aacd5537
AA		 7239 /* Init or reset the session slot tables */
7240 status = nfs4_setup_session_slot_tables(session);
7241 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7242 if (status)
7243 goto out;
7244
7245 ptr = (unsigned *)&session->sess_id.data[0];
7246 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7247 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7248out:
7249 dprintk("<-- %s\n", __func__);
7250 return status;
7251}
7252
0f3e66c6
AA		 7253/*
7254 * Issue the over-the-wire RPC DESTROY_SESSION.
7255 * The caller must serialize access to this routine.
7256 */
848f5bda
TM		 7257int nfs4_proc_destroy_session(struct nfs4_session *session,
7258 struct rpc_cred *cred)
0f3e66c6 7259{
848f5bda
TM		 7260 struct rpc_message msg = {
7261 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7262 .rpc_argp = session,
7263 .rpc_cred = cred,
7264 };
0f3e66c6 7265 int status = 0;
0f3e66c6
AA		 7266
7267 dprintk("--> nfs4_proc_destroy_session\n");
7268
7269 /* session is still being setup */
7270 if (session->clp->cl_cons_state != NFS_CS_READY)
7271 return status;
7272
1bd714f2 7273 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7274 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7275
7276 if (status)
08106ac7 7277 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7278 "Session has been destroyed regardless...\n", status);
7279
7280 dprintk("<-- nfs4_proc_destroy_session\n");
7281 return status;
7282}
7283
fc01cea9
AA		 7284/*
7285 * Renew the cl_session lease.
7286 */
d5f8d3fe
TM		 7287struct nfs4_sequence_data {
7288 struct nfs_client *clp;
7289 struct nfs4_sequence_args args;
7290 struct nfs4_sequence_res res;
7291};
7292
dc96aef9
AB		 7293static void nfs41_sequence_release(void *data)
7294{
d5f8d3fe
TM		 7295 struct nfs4_sequence_data *calldata = data;
7296 struct nfs_client *clp = calldata->clp;
dc96aef9 7297
7135840f
AB		 7298 if (atomic_read(&clp->cl_count) > 1)
7299 nfs4_schedule_state_renewal(clp);
7300 nfs_put_client(clp);
d5f8d3fe 7301 kfree(calldata);
dc96aef9
AB		 7302}
7303
aa5190d0
TM		 7304static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7305{
7306 switch(task->tk_status) {
7307 case -NFS4ERR_DELAY:
aa5190d0
TM		 7308 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7309 return -EAGAIN;
7310 default:
0400a6b0 7311 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7312 }
7313 return 0;
7314}
7315
dc96aef9 7316static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7317{
d5f8d3fe
TM		 7318 struct nfs4_sequence_data *calldata = data;
7319 struct nfs_client *clp = calldata->clp;
fc01cea9 7320
14516c3a
TM		 7321 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7322 return;
fc01cea9 7323
c6d01c6f 7324 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7325 if (task->tk_status < 0) {
7326 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7327 if (atomic_read(&clp->cl_count) == 1)
7328 goto out;
fc01cea9 7329
aa5190d0
TM		 7330 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7331 rpc_restart_call_prepare(task);
fc01cea9
AA		 7332 return;
7333 }
7334 }
fc01cea9 7335 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7336out:
fc01cea9
AA		 7337 dprintk("<-- %s\n", __func__);
7338}
7339
7340static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7341{
d5f8d3fe
TM		 7342 struct nfs4_sequence_data *calldata = data;
7343 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7344 struct nfs4_sequence_args *args;
7345 struct nfs4_sequence_res *res;
7346
fc01cea9
AA		 7347 args = task->tk_msg.rpc_argp;
7348 res = task->tk_msg.rpc_resp;
7349
d9afbd1b 7350 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7351}
7352
7353static const struct rpc_call_ops nfs41_sequence_ops = {
7354 .rpc_call_done = nfs41_sequence_call_done,
7355 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7356 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7357};
7358
8fe72bac
TM		 7359static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7360 struct rpc_cred *cred,
7361 bool is_privileged)
fc01cea9 7362{
d5f8d3fe 7363 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7364 struct rpc_message msg = {
7365 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7366 .rpc_cred = cred,
7367 };
71ac6da9
TM		 7368 struct rpc_task_setup task_setup_data = {
7369 .rpc_client = clp->cl_rpcclient,
7370 .rpc_message = &msg,
8fe72bac 7371 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7372 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7373 };
fc01cea9 7374
7135840f 7375 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7376 return ERR_PTR(-EIO);
dfb4f309 7377 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7378 if (calldata == NULL) {
7135840f 7379 nfs_put_client(clp);
71ac6da9 7380 return ERR_PTR(-ENOMEM);
fc01cea9 7381 }
a9c92d6b 7382 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7383 if (is_privileged)
7384 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7385 msg.rpc_argp = &calldata->args;
7386 msg.rpc_resp = &calldata->res;
7387 calldata->clp = clp;
71ac6da9 7388 task_setup_data.callback_data = calldata;
fc01cea9 7389
71ac6da9
TM		 7390 return rpc_run_task(&task_setup_data);
7391}
7392
2f60ea6b 7393static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7394{
7395 struct rpc_task *task;
7396 int ret = 0;
7397
2f60ea6b 7398 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7399 return -EAGAIN;
8fe72bac 7400 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7401 if (IS_ERR(task))
7402 ret = PTR_ERR(task);
7403 else
bf294b41 7404 rpc_put_task_async(task);
71ac6da9
TM		 7405 dprintk("<-- %s status=%d\n", __func__, ret);
7406 return ret;
7407}
7408
7409static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7410{
7411 struct rpc_task *task;
7412 int ret;
7413
8fe72bac 7414 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7415 if (IS_ERR(task)) {
7416 ret = PTR_ERR(task);
7417 goto out;
7418 }
7419 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7420 if (!ret) {
7421 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7422
7423 if (task->tk_status == 0)
7424 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7425 ret = task->tk_status;
b4410c2f 7426 }
71ac6da9
TM		 7427 rpc_put_task(task);
7428out:
7429 dprintk("<-- %s status=%d\n", __func__, ret);
7430 return ret;
fc01cea9
AA		 7431}
7432
fce5c838
RL		 7433struct nfs4_reclaim_complete_data {
7434 struct nfs_client *clp;
7435 struct nfs41_reclaim_complete_args arg;
7436 struct nfs41_reclaim_complete_res res;
7437};
7438
7439static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7440{
7441 struct nfs4_reclaim_complete_data *calldata = data;
7442
d9afbd1b
TM		 7443 nfs41_setup_sequence(calldata->clp->cl_session,
7444 &calldata->arg.seq_args,
7445 &calldata->res.seq_res,
7446 task);
fce5c838
RL		 7447}
7448
aa5190d0
TM		 7449static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7450{
7451 switch(task->tk_status) {
7452 case 0:
7453 case -NFS4ERR_COMPLETE_ALREADY:
7454 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7455 break;
7456 case -NFS4ERR_DELAY:
aa5190d0 7457 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7458 /* fall through */
7459 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7460 return -EAGAIN;
7461 default:
0400a6b0 7462 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7463 }
7464 return 0;
7465}
7466
fce5c838
RL		 7467static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7468{
7469 struct nfs4_reclaim_complete_data *calldata = data;
7470 struct nfs_client *clp = calldata->clp;
7471 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7472
7473 dprintk("--> %s\n", __func__);
14516c3a
TM		 7474 if (!nfs41_sequence_done(task, res))
7475 return;
fce5c838 7476
c6d01c6f 7477 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7478 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7479 rpc_restart_call_prepare(task);
7480 return;
7481 }
fce5c838
RL		 7482 dprintk("<-- %s\n", __func__);
7483}
7484
7485static void nfs4_free_reclaim_complete_data(void *data)
7486{
7487 struct nfs4_reclaim_complete_data *calldata = data;
7488
7489 kfree(calldata);
7490}
7491
7492static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7493 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7494 .rpc_call_done = nfs4_reclaim_complete_done,
7495 .rpc_release = nfs4_free_reclaim_complete_data,
7496};
7497
7498/*
7499 * Issue a global reclaim complete.
7500 */
965e9c23
TM		 7501static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7502 struct rpc_cred *cred)
fce5c838
RL		 7503{
7504 struct nfs4_reclaim_complete_data *calldata;
7505 struct rpc_task *task;
7506 struct rpc_message msg = {
7507 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7508 .rpc_cred = cred,
fce5c838
RL		 7509 };
7510 struct rpc_task_setup task_setup_data = {
7511 .rpc_client = clp->cl_rpcclient,
7512 .rpc_message = &msg,
7513 .callback_ops = &nfs4_reclaim_complete_call_ops,
7514 .flags = RPC_TASK_ASYNC,
7515 };
7516 int status = -ENOMEM;
7517
7518 dprintk("--> %s\n", __func__);
8535b2be 7519 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7520 if (calldata == NULL)
7521 goto out;
7522 calldata->clp = clp;
7523 calldata->arg.one_fs = 0;
fce5c838 7524
a9c92d6b 7525 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7526 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7527 msg.rpc_argp = &calldata->arg;
7528 msg.rpc_resp = &calldata->res;
7529 task_setup_data.callback_data = calldata;
7530 task = rpc_run_task(&task_setup_data);
acf82b85 7531 if (IS_ERR(task)) {
fce5c838 7532 status = PTR_ERR(task);
acf82b85
DC		 7533 goto out;
7534 }
c34c32ea
AA		 7535 status = nfs4_wait_for_completion_rpc_task(task);
7536 if (status == 0)
7537 status = task->tk_status;
fce5c838 7538 rpc_put_task(task);
acf82b85 7539 return 0;
fce5c838
RL		 7540out:
7541 dprintk("<-- %s status=%d\n", __func__, status);
7542 return status;
7543}
b1f69b75
AA		 7544
7545static void
7546nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7547{
7548 struct nfs4_layoutget *lgp = calldata;
c31663d4 7549 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7550 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7551
7552 dprintk("--> %s\n", __func__);
c31663d4
FI		 7553 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7554 * right now covering the LAYOUTGET we are about to send.
7555 * However, that is not so catastrophic, and there seems
7556 * to be no way to prevent it completely.
7557 */
6ba7db34 7558 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7559 &lgp->res.seq_res, task))
b1f69b75 7560 return;
cf7d63f1
FI		 7561 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7562 NFS_I(lgp->args.inode)->layout,
ce6ab4f2 7563 &lgp->args.range,
cf7d63f1
FI		 7564 lgp->args.ctx->state)) {
7565 rpc_exit(task, NFS4_OK);
cf7d63f1 7566 }
b1f69b75
AA		 7567}
7568
7569static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7570{
7571 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7572 struct inode *inode = lgp->args.inode;
7573 struct nfs_server *server = NFS_SERVER(inode);
7574 struct pnfs_layout_hdr *lo;
7575 struct nfs4_state *state = NULL;
ed7e5423 7576 unsigned long timeo, now, giveup;
b1f69b75 7577
ed7e5423 7578 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7579
6ba7db34 7580 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7581 goto out;
b1f69b75
AA		 7582
7583 switch (task->tk_status) {
7584 case 0:
ee314c2a 7585 goto out;
ed7e5423
BH		 7586 /*
7587 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7588 * (or clients) writing to the same RAID stripe
7589 */
b1f69b75 7590 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7591 /*
7592 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7593 * existing layout before getting a new one).
7594 */
b1f69b75 7595 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7596 timeo = rpc_get_timeout(task->tk_client);
7597 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7598 now = jiffies;
7599 if (time_after(giveup, now)) {
7600 unsigned long delay;
7601
7602 /* Delay for:
7603 * - Not less then NFS4_POLL_RETRY_MIN.
7604 * - One last time a jiffie before we give up
7605 * - exponential backoff (time_now minus start_attempt)
7606 */
7607 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7608 min((giveup - now - 1),
7609 now - lgp->args.timestamp));
7610
7611 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7612 __func__, delay);
7613 rpc_delay(task, delay);
7614 task->tk_status = 0;
7615 rpc_restart_call_prepare(task);
7616 goto out; /* Do not call nfs4_async_handle_error() */
7617 }
ee314c2a
TM		 7618 break;
7619 case -NFS4ERR_EXPIRED:
7620 case -NFS4ERR_BAD_STATEID:
7621 spin_lock(&inode->i_lock);
7622 lo = NFS_I(inode)->layout;
7623 if (!lo || list_empty(&lo->plh_segs)) {
7624 spin_unlock(&inode->i_lock);
7625 /* If the open stateid was bad, then recover it. */
7626 state = lgp->args.ctx->state;
7627 } else {
7628 LIST_HEAD(head);
7629
defb8460
CH		 7630 /*
7631 * Mark the bad layout state as invalid, then retry
7632 * with the current stateid.
7633 */
ee314c2a
TM		 7634 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7635 spin_unlock(&inode->i_lock);
ee314c2a 7636 pnfs_free_lseg_list(&head);
defb8460
CH		 7637
7638 task->tk_status = 0;
7639 rpc_restart_call_prepare(task);
b1f69b75
AA		 7640 }
7641 }
8478eaa1 7642 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
ee314c2a
TM		 7643 rpc_restart_call_prepare(task);
7644out:
b1f69b75
AA		 7645 dprintk("<-- %s\n", __func__);
7646}
7647
8554116e
IK		 7648static size_t max_response_pages(struct nfs_server *server)
7649{
7650 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7651 return nfs_page_array_len(0, max_resp_sz);
7652}
7653
7654static void nfs4_free_pages(struct page **pages, size_t size)
7655{
7656 int i;
7657
7658 if (!pages)
7659 return;
7660
7661 for (i = 0; i < size; i++) {
7662 if (!pages[i])
7663 break;
7664 __free_page(pages[i]);
7665 }
7666 kfree(pages);
7667}
7668
7669static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7670{
7671 struct page **pages;
7672 int i;
7673
7674 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7675 if (!pages) {
7676 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7677 return NULL;
7678 }
7679
7680 for (i = 0; i < size; i++) {
7681 pages[i] = alloc_page(gfp_flags);
7682 if (!pages[i]) {
7683 dprintk("%s: failed to allocate page\n", __func__);
7684 nfs4_free_pages(pages, size);
7685 return NULL;
7686 }
7687 }
7688
7689 return pages;
7690}
7691
b1f69b75
AA		 7692static void nfs4_layoutget_release(void *calldata)
7693{
7694 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7695 struct inode *inode = lgp->args.inode;
7696 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7697 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7698
7699 dprintk("--> %s\n", __func__);
8554116e 7700 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7701 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7702 put_nfs_open_context(lgp->args.ctx);
7703 kfree(calldata);
7704 dprintk("<-- %s\n", __func__);
7705}
7706
7707static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7708 .rpc_call_prepare = nfs4_layoutget_prepare,
7709 .rpc_call_done = nfs4_layoutget_done,
7710 .rpc_release = nfs4_layoutget_release,
7711};
7712
a0b0a6e3
TM		 7713struct pnfs_layout_segment *
7714nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7715{
a47970ff
WAA		 7716 struct inode *inode = lgp->args.inode;
7717 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7718 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7719 struct rpc_task *task;
7720 struct rpc_message msg = {
7721 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7722 .rpc_argp = &lgp->args,
7723 .rpc_resp = &lgp->res,
6ab59344 7724 .rpc_cred = lgp->cred,
b1f69b75
AA		 7725 };
7726 struct rpc_task_setup task_setup_data = {
7727 .rpc_client = server->client,
7728 .rpc_message = &msg,
7729 .callback_ops = &nfs4_layoutget_call_ops,
7730 .callback_data = lgp,
7731 .flags = RPC_TASK_ASYNC,
7732 };
a0b0a6e3 7733 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7734 int status = 0;
7735
7736 dprintk("--> %s\n", __func__);
7737
4bd5a980
PT		 7738 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7739 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7740
8554116e
IK		 7741 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7742 if (!lgp->args.layout.pages) {
7743 nfs4_layoutget_release(lgp);
a0b0a6e3 7744 return ERR_PTR(-ENOMEM);
8554116e
IK		 7745 }
7746 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7747 lgp->args.timestamp = jiffies;
8554116e 7748
35124a09 7749 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7750 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7751 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 7752
b1f69b75
AA		 7753 task = rpc_run_task(&task_setup_data);
7754 if (IS_ERR(task))
a0b0a6e3 7755 return ERR_CAST(task);
b1f69b75 7756 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7757 if (status == 0)
7758 status = task->tk_status;
1037e6ea
TM		 7759 trace_nfs4_layoutget(lgp->args.ctx,
7760 &lgp->args.range,
7761 &lgp->res.range,
7762 status);
085b7a45
WAA		 7763 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7764 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7765 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7766 rpc_put_task(task);
7767 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7768 if (status)
7769 return ERR_PTR(status);
7770 return lseg;
b1f69b75
AA		 7771}
7772
cbe82603
BH		 7773static void
7774nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7775{
7776 struct nfs4_layoutreturn *lrp = calldata;
7777
7778 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7779 nfs41_setup_sequence(lrp->clp->cl_session,
7780 &lrp->args.seq_args,
7781 &lrp->res.seq_res,
7782 task);
cbe82603
BH		 7783}
7784
7785static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7786{
7787 struct nfs4_layoutreturn *lrp = calldata;
7788 struct nfs_server *server;
7789
7790 dprintk("--> %s\n", __func__);
7791
6ba7db34 7792 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7793 return;
7794
7795 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7796 switch (task->tk_status) {
7797 default:
7798 task->tk_status = 0;
7799 case 0:
7800 break;
7801 case -NFS4ERR_DELAY:
8478eaa1 7802 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 7803 break;
d00c5d43 7804 rpc_restart_call_prepare(task);
cbe82603
BH		 7805 return;
7806 }
cbe82603
BH		 7807 dprintk("<-- %s\n", __func__);
7808}
7809
7810static void nfs4_layoutreturn_release(void *calldata)
7811{
7812 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7813 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7814
7815 dprintk("--> %s\n", __func__);
849b286f
TM		 7816 spin_lock(&lo->plh_inode->i_lock);
7817 if (lrp->res.lrs_present)
7818 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
d67ae825 7819 pnfs_clear_layoutreturn_waitbit(lo);
193e3aa2
PT		 7820 clear_bit(NFS_LAYOUT_RETURN_BEFORE_CLOSE, &lo->plh_flags);
7821 rpc_wake_up(&NFS_SERVER(lo->plh_inode)->roc_rpcwaitq);
849b286f
TM		 7822 lo->plh_block_lgets--;
7823 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7824 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 7825 kfree(calldata);
7826 dprintk("<-- %s\n", __func__);
7827}
7828
7829static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7830 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7831 .rpc_call_done = nfs4_layoutreturn_done,
7832 .rpc_release = nfs4_layoutreturn_release,
7833};
7834
6c16605d 7835int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 7836{
7837 struct rpc_task *task;
7838 struct rpc_message msg = {
7839 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7840 .rpc_argp = &lrp->args,
7841 .rpc_resp = &lrp->res,
9556000d 7842 .rpc_cred = lrp->cred,
cbe82603
BH		 7843 };
7844 struct rpc_task_setup task_setup_data = {
1771c577 7845 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7846 .rpc_message = &msg,
7847 .callback_ops = &nfs4_layoutreturn_call_ops,
7848 .callback_data = lrp,
6c16605d 7849 .flags = RPC_TASK_ASYNC,
cbe82603 7850 };
6c16605d 7851 int status = 0;
cbe82603
BH		 7852
7853 dprintk("--> %s\n", __func__);
a9c92d6b 7854 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7855 task = rpc_run_task(&task_setup_data);
7856 if (IS_ERR(task))
7857 return PTR_ERR(task);
6c16605d
PT		 7858 if (sync == false)
7859 goto out;
7860 status = nfs4_wait_for_completion_rpc_task(task);
7861 if (status != 0)
7862 goto out;
cbe82603 7863 status = task->tk_status;
1037e6ea 7864 trace_nfs4_layoutreturn(lrp->args.inode, status);
6c16605d 7865out:
cbe82603
BH		 7866 dprintk("<-- %s status=%d\n", __func__, status);
7867 rpc_put_task(task);
7868 return status;
7869}
7870
b1f69b75 7871static int
cd5875fe
TM		 7872_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7873 struct pnfs_device *pdev,
7874 struct rpc_cred *cred)
b1f69b75
AA		 7875{
7876 struct nfs4_getdeviceinfo_args args = {
7877 .pdev = pdev,
7878 };
7879 struct nfs4_getdeviceinfo_res res = {
7880 .pdev = pdev,
7881 };
7882 struct rpc_message msg = {
7883 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7884 .rpc_argp = &args,
7885 .rpc_resp = &res,
cd5875fe 7886 .rpc_cred = cred,
b1f69b75
AA		 7887 };
7888 int status;
7889
7890 dprintk("--> %s\n", __func__);
7c513058 7891 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7892 dprintk("<-- %s status=%d\n", __func__, status);
7893
7894 return status;
7895}
7896
cd5875fe
TM		 7897int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7898 struct pnfs_device *pdev,
7899 struct rpc_cred *cred)
b1f69b75
AA		 7900{
7901 struct nfs4_exception exception = { };
7902 int err;
7903
7904 do {
7905 err = nfs4_handle_exception(server,
cd5875fe 7906 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7907 &exception);
7908 } while (exception.retry);
7909 return err;
7910}
7911EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7912
863a3c6c
AA		 7913static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7914{
7915 struct nfs4_layoutcommit_data *data = calldata;
7916 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7917 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7918
d9afbd1b
TM		 7919 nfs41_setup_sequence(session,
7920 &data->args.seq_args,
7921 &data->res.seq_res,
7922 task);
863a3c6c
AA		 7923}
7924
7925static void
7926nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7927{
7928 struct nfs4_layoutcommit_data *data = calldata;
7929 struct nfs_server *server = NFS_SERVER(data->args.inode);
7930
6ba7db34 7931 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7932 return;
7933
7934 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7935 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7936 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7937 case -NFS4ERR_BADLAYOUT: /* no layout */
7938 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7939 task->tk_status = 0;
e59d27e0 7940 case 0:
e59d27e0
TM		 7941 break;
7942 default:
8478eaa1 7943 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 7944 rpc_restart_call_prepare(task);
7945 return;
7946 }
7947 }
863a3c6c
AA		 7948}
7949
7950static void nfs4_layoutcommit_release(void *calldata)
7951{
7952 struct nfs4_layoutcommit_data *data = calldata;
7953
db29c089 7954 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 7955 nfs_post_op_update_inode_force_wcc(data->args.inode,
7956 data->res.fattr);
863a3c6c
AA		 7957 put_rpccred(data->cred);
7958 kfree(data);
7959}
7960
7961static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7962 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7963 .rpc_call_done = nfs4_layoutcommit_done,
7964 .rpc_release = nfs4_layoutcommit_release,
7965};
7966
7967int
ef311537 7968nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7969{
7970 struct rpc_message msg = {
7971 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7972 .rpc_argp = &data->args,
7973 .rpc_resp = &data->res,
7974 .rpc_cred = data->cred,
7975 };
7976 struct rpc_task_setup task_setup_data = {
7977 .task = &data->task,
7978 .rpc_client = NFS_CLIENT(data->args.inode),
7979 .rpc_message = &msg,
7980 .callback_ops = &nfs4_layoutcommit_ops,
7981 .callback_data = data,
7982 .flags = RPC_TASK_ASYNC,
7983 };
7984 struct rpc_task *task;
7985 int status = 0;
7986
7987 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7988 "lbw: %llu inode %lu\n",
7989 data->task.tk_pid, sync,
7990 data->args.lastbytewritten,
7991 data->args.inode->i_ino);
7992
a9c92d6b 7993 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7994 task = rpc_run_task(&task_setup_data);
7995 if (IS_ERR(task))
7996 return PTR_ERR(task);
ef311537 7997 if (sync == false)
863a3c6c
AA		 7998 goto out;
7999 status = nfs4_wait_for_completion_rpc_task(task);
8000 if (status != 0)
8001 goto out;
8002 status = task->tk_status;
1037e6ea 8003 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 8004out:
8005 dprintk("%s: status %d\n", __func__, status);
8006 rpc_put_task(task);
8007 return status;
8008}
fca78d6d 8009
97431204
AA		 8010/**
8011 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8012 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8013 */
fca78d6d
BS		 8014static int
8015_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8016 struct nfs_fsinfo *info,
8017 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8018{
8019 struct nfs41_secinfo_no_name_args args = {
8020 .style = SECINFO_STYLE_CURRENT_FH,
8021 };
8022 struct nfs4_secinfo_res res = {
8023 .flavors = flavors,
8024 };
8025 struct rpc_message msg = {
8026 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8027 .rpc_argp = &args,
8028 .rpc_resp = &res,
8029 };
b1b3e136 8030 struct rpc_clnt *clnt = server->client;
7cb852df 8031 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8032 int status;
8033
8034 if (use_integrity) {
8035 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8036 cred = nfs4_get_clid_cred(server->nfs_client);
8037 msg.rpc_cred = cred;
b1b3e136
WAA		 8038 }
8039
8040 dprintk("--> %s\n", __func__);
8041 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8042 &res.seq_res, 0);
8043 dprintk("<-- %s status=%d\n", __func__, status);
8044
7cb852df
WAA		 8045 if (cred)
8046 put_rpccred(cred);
b1b3e136
WAA		 8047
8048 return status;
fca78d6d
BS		 8049}
8050
8051static int
8052nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8053 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8054{
8055 struct nfs4_exception exception = { };
8056 int err;
8057 do {
b1b3e136
WAA		 8058 /* first try using integrity protection */
8059 err = -NFS4ERR_WRONGSEC;
8060
8061 /* try to use integrity protection with machine cred */
8062 if (_nfs4_is_integrity_protected(server->nfs_client))
8063 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8064 flavors, true);
8065
8066 /*
8067 * if unable to use integrity protection, or SECINFO with
8068 * integrity protection returns NFS4ERR_WRONGSEC (which is
8069 * disallowed by spec, but exists in deployed servers) use
8070 * the current filesystem's rpc_client and the user cred.
8071 */
8072 if (err == -NFS4ERR_WRONGSEC)
8073 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8074 flavors, false);
8075
fca78d6d
BS		 8076 switch (err) {
8077 case 0:
8078 case -NFS4ERR_WRONGSEC:
78b19bae 8079 case -ENOTSUPP:
05e9cfb4 8080 goto out;
fca78d6d
BS		 8081 default:
8082 err = nfs4_handle_exception(server, err, &exception);
8083 }
8084 } while (exception.retry);
05e9cfb4 8085out:
fca78d6d
BS		 8086 return err;
8087}
8088
8089static int
8090nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8091 struct nfs_fsinfo *info)
8092{
8093 int err;
8094 struct page *page;
367156d9 8095 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8096 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8097 struct nfs4_secinfo4 *secinfo;
8098 int i;
fca78d6d
BS		 8099
8100 page = alloc_page(GFP_KERNEL);
8101 if (!page) {
8102 err = -ENOMEM;
8103 goto out;
8104 }
8105
8106 flavors = page_address(page);
8107 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8108
8109 /*
8110 * Fall back on "guess and check" method if
8111 * the server doesn't support SECINFO_NO_NAME
8112 */
78b19bae 8113 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8114 err = nfs4_find_root_sec(server, fhandle, info);
8115 goto out_freepage;
8116 }
8117 if (err)
8118 goto out_freepage;
8119
58a8cf12
WAA		 8120 for (i = 0; i < flavors->num_flavors; i++) {
8121 secinfo = &flavors->flavors[i];
8122
8123 switch (secinfo->flavor) {
8124 case RPC_AUTH_NULL:
8125 case RPC_AUTH_UNIX:
8126 case RPC_AUTH_GSS:
8127 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8128 &secinfo->flavor_info);
8129 break;
8130 default:
8131 flavor = RPC_AUTH_MAXFLAVOR;
8132 break;
8133 }
8134
4d4b69dd
WAA		 8135 if (!nfs_auth_info_match(&server->auth_info, flavor))
8136 flavor = RPC_AUTH_MAXFLAVOR;
8137
58a8cf12
WAA		 8138 if (flavor != RPC_AUTH_MAXFLAVOR) {
8139 err = nfs4_lookup_root_sec(server, fhandle,
8140 info, flavor);
8141 if (!err)
8142 break;
8143 }
8144 }
8145
8146 if (flavor == RPC_AUTH_MAXFLAVOR)
8147 err = -EPERM;
fca78d6d
BS		 8148
8149out_freepage:
8150 put_page(page);
8151 if (err == -EACCES)
8152 return -EPERM;
8153out:
8154 return err;
8155}
1cab0652 8156
ab7cb0df
TM		 8157static int _nfs41_test_stateid(struct nfs_server *server,
8158 nfs4_stateid *stateid,
8159 struct rpc_cred *cred)
7d974794
BS		 8160{
8161 int status;
8162 struct nfs41_test_stateid_args args = {
1cab0652 8163 .stateid = stateid,
7d974794
BS		 8164 };
8165 struct nfs41_test_stateid_res res;
8166 struct rpc_message msg = {
8167 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8168 .rpc_argp = &args,
8169 .rpc_resp = &res,
ab7cb0df 8170 .rpc_cred = cred,
7d974794 8171 };
3787d506
WAA		 8172 struct rpc_clnt *rpc_client = server->client;
8173
8174 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8175 &rpc_client, &msg);
1cab0652 8176
38527b15 8177 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8178 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8179 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8180 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8181 &args.seq_args, &res.seq_res);
38527b15
CL		 8182 if (status != NFS_OK) {
8183 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8184 return status;
38527b15
CL		 8185 }
8186 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8187 return -res.status;
7d974794
BS		 8188}
8189
38527b15
CL		 8190/**
8191 * nfs41_test_stateid - perform a TEST_STATEID operation
8192 *
8193 * @server: server / transport on which to perform the operation
8194 * @stateid: state ID to test
ab7cb0df 8195 * @cred: credential
38527b15
CL		 8196 *
8197 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8198 * Otherwise a negative NFS4ERR value is returned if the operation
8199 * failed or the state ID is not currently valid.
8200 */
ab7cb0df
TM		 8201static int nfs41_test_stateid(struct nfs_server *server,
8202 nfs4_stateid *stateid,
8203 struct rpc_cred *cred)
7d974794
BS		 8204{
8205 struct nfs4_exception exception = { };
8206 int err;
8207 do {
ab7cb0df 8208 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8209 if (err != -NFS4ERR_DELAY)
8210 break;
8211 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8212 } while (exception.retry);
8213 return err;
8214}
9aeda35f 8215
7c1d5fae
TM		 8216struct nfs_free_stateid_data {
8217 struct nfs_server *server;
8218 struct nfs41_free_stateid_args args;
9aeda35f 8219 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8220};
8221
8222static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8223{
8224 struct nfs_free_stateid_data *data = calldata;
8225 nfs41_setup_sequence(nfs4_get_session(data->server),
8226 &data->args.seq_args,
8227 &data->res.seq_res,
8228 task);
8229}
8230
8231static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8232{
8233 struct nfs_free_stateid_data *data = calldata;
8234
8235 nfs41_sequence_done(task, &data->res.seq_res);
8236
8237 switch (task->tk_status) {
8238 case -NFS4ERR_DELAY:
8478eaa1 8239 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8240 rpc_restart_call_prepare(task);
8241 }
8242}
8243
8244static void nfs41_free_stateid_release(void *calldata)
8245{
8246 kfree(calldata);
8247}
8248
17f26b12 8249static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8250 .rpc_call_prepare = nfs41_free_stateid_prepare,
8251 .rpc_call_done = nfs41_free_stateid_done,
8252 .rpc_release = nfs41_free_stateid_release,
8253};
8254
8255static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8256 nfs4_stateid *stateid,
ab7cb0df 8257 struct rpc_cred *cred,
7c1d5fae
TM		 8258 bool privileged)
8259{
9aeda35f
BS		 8260 struct rpc_message msg = {
8261 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8262 .rpc_cred = cred,
9aeda35f 8263 };
7c1d5fae
TM		 8264 struct rpc_task_setup task_setup = {
8265 .rpc_client = server->client,
8266 .rpc_message = &msg,
8267 .callback_ops = &nfs41_free_stateid_ops,
8268 .flags = RPC_TASK_ASYNC,
8269 };
8270 struct nfs_free_stateid_data *data;
9aeda35f 8271
3787d506
WAA		 8272 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8273 &task_setup.rpc_client, &msg);
8274
38527b15 8275 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8276 data = kmalloc(sizeof(*data), GFP_NOFS);
8277 if (!data)
8278 return ERR_PTR(-ENOMEM);
8279 data->server = server;
8280 nfs4_stateid_copy(&data->args.stateid, stateid);
8281
8282 task_setup.callback_data = data;
8283
8284 msg.rpc_argp = &data->args;
8285 msg.rpc_resp = &data->res;
a9c92d6b 8286 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8287 if (privileged)
8288 nfs4_set_sequence_privileged(&data->args.seq_args);
8289
8290 return rpc_run_task(&task_setup);
9aeda35f
BS		 8291}
8292
38527b15
CL		 8293/**
8294 * nfs41_free_stateid - perform a FREE_STATEID operation
8295 *
8296 * @server: server / transport on which to perform the operation
8297 * @stateid: state ID to release
ab7cb0df 8298 * @cred: credential
38527b15
CL		 8299 *
8300 * Returns NFS_OK if the server freed "stateid". Otherwise a
8301 * negative NFS4ERR value is returned.
8302 */
ab7cb0df
TM		 8303static int nfs41_free_stateid(struct nfs_server *server,
8304 nfs4_stateid *stateid,
8305 struct rpc_cred *cred)
9aeda35f 8306{
7c1d5fae
TM		 8307 struct rpc_task *task;
8308 int ret;
8309
ab7cb0df 8310 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8311 if (IS_ERR(task))
8312 return PTR_ERR(task);
8313 ret = rpc_wait_for_completion_task(task);
8314 if (!ret)
8315 ret = task->tk_status;
8316 rpc_put_task(task);
8317 return ret;
9aeda35f 8318}
36281caa 8319
f1cdae87
JL		 8320static void
8321nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8322{
8323 struct rpc_task *task;
ab7cb0df 8324 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8325
ab7cb0df 8326 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8327 nfs4_free_lock_state(server, lsp);
8328 if (IS_ERR(task))
f1cdae87 8329 return;
c8b2d0bf 8330 rpc_put_task(task);
c8b2d0bf
TM		 8331}
8332
36281caa
TM		 8333static bool nfs41_match_stateid(const nfs4_stateid *s1,
8334 const nfs4_stateid *s2)
8335{
2d2f24ad 8336 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8337 return false;
8338
2d2f24ad 8339 if (s1->seqid == s2->seqid)
36281caa 8340 return true;
2d2f24ad 8341 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8342 return true;
8343
8344 return false;
8345}
8346
557134a3
AA		 8347#endif /* CONFIG_NFS_V4_1 */
8348
36281caa
TM		 8349static bool nfs4_match_stateid(const nfs4_stateid *s1,
8350 const nfs4_stateid *s2)
8351{
f597c537 8352 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8353}
8354
8355
17280175 8356static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8357 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8358 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8359 .recover_open = nfs4_open_reclaim,
8360 .recover_lock = nfs4_lock_reclaim,
591d71cb 8361 .establish_clid = nfs4_init_clientid,
05f4c350 8362 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8363};
8364
591d71cb 8365#if defined(CONFIG_NFS_V4_1)
17280175 8366static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8367 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8368 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8369 .recover_open = nfs4_open_reclaim,
8370 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8371 .establish_clid = nfs41_init_clientid,
fce5c838 8372 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8373 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8374};
8375#endif /* CONFIG_NFS_V4_1 */
8376
17280175 8377static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8378 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8379 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8380 .recover_open = nfs40_open_expired,
591d71cb
AA		 8381 .recover_lock = nfs4_lock_expired,
8382 .establish_clid = nfs4_init_clientid,
8383};
8384
8385#if defined(CONFIG_NFS_V4_1)
17280175 8386static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8387 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8388 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8389 .recover_open = nfs41_open_expired,
8390 .recover_lock = nfs41_lock_expired,
4d643d1d 8391 .establish_clid = nfs41_init_clientid,
1da177e4 8392};
591d71cb 8393#endif /* CONFIG_NFS_V4_1 */
1da177e4 8394
17280175 8395static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8396 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8397 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8398 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8399};
8400
8401#if defined(CONFIG_NFS_V4_1)
17280175 8402static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8403 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8404 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8405 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8406};
8407#endif
8408
ec011fe8 8409static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8410 .get_locations = _nfs40_proc_get_locations,
44c99933 8411 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8412};
8413
8414#if defined(CONFIG_NFS_V4_1)
8415static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8416 .get_locations = _nfs41_proc_get_locations,
44c99933 8417 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8418};
8419#endif /* CONFIG_NFS_V4_1 */
8420
97dc1359
TM		 8421static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8422 .minor_version = 0,
39c6daae
TM		 8423 .init_caps = NFS_CAP_READDIRPLUS
8424 | NFS_CAP_ATOMIC_OPEN
8425 | NFS_CAP_CHANGE_ATTR
8426 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8427 .init_client = nfs40_init_client,
8428 .shutdown_client = nfs40_shutdown_client,
36281caa 8429 .match_stateid = nfs4_match_stateid,
fca78d6d 8430 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8431 .free_lock_state = nfs4_release_lockowner,
63f5f796 8432 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8433 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8434 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8435 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8436 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8437 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8438};
8439
8440#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8441static struct nfs_seqid *
8442nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8443{
8444 return NULL;
8445}
8446
97dc1359
TM		 8447static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8448 .minor_version = 1,
39c6daae
TM		 8449 .init_caps = NFS_CAP_READDIRPLUS
8450 | NFS_CAP_ATOMIC_OPEN
8451 | NFS_CAP_CHANGE_ATTR
3b66486c 8452 | NFS_CAP_POSIX_LOCK
49f9a0fa 8453 | NFS_CAP_STATEID_NFSV41
e983120e 8454 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8455 .init_client = nfs41_init_client,
8456 .shutdown_client = nfs41_shutdown_client,
36281caa 8457 .match_stateid = nfs41_match_stateid,
fca78d6d 8458 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8459 .free_lock_state = nfs41_free_lock_state,
63f5f796 8460 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8461 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8462 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8463 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8464 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8465 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8466};
8467#endif
8468
42c2c424
SD		 8469#if defined(CONFIG_NFS_V4_2)
8470static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8471 .minor_version = 2,
7017310a
BS		 8472 .init_caps = NFS_CAP_READDIRPLUS
8473 | NFS_CAP_ATOMIC_OPEN
8474 | NFS_CAP_CHANGE_ATTR
8475 | NFS_CAP_POSIX_LOCK
8476 | NFS_CAP_STATEID_NFSV41
e983120e 8477 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8478 | NFS_CAP_ALLOCATE
624bd5b7 8479 | NFS_CAP_DEALLOCATE
e983120e 8480 | NFS_CAP_SEEK,
abf79bb3
CL		 8481 .init_client = nfs41_init_client,
8482 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8483 .match_stateid = nfs41_match_stateid,
8484 .find_root_sec = nfs41_find_root_sec,
7017310a 8485 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8486 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8487 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8488 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8489 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8490 .state_renewal_ops = &nfs41_state_renewal_ops,
8491};
8492#endif
8493
97dc1359
TM		 8494const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8495 [0] = &nfs_v4_0_minor_ops,
8496#if defined(CONFIG_NFS_V4_1)
8497 [1] = &nfs_v4_1_minor_ops,
8498#endif
42c2c424
SD		 8499#if defined(CONFIG_NFS_V4_2)
8500 [2] = &nfs_v4_2_minor_ops,
8501#endif
97dc1359
TM		 8502};
8503
17f26b12 8504static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8505 .create = nfs_create,
8506 .lookup = nfs_lookup,
8507 .atomic_open = nfs_atomic_open,
8508 .link = nfs_link,
8509 .unlink = nfs_unlink,
8510 .symlink = nfs_symlink,
8511 .mkdir = nfs_mkdir,
8512 .rmdir = nfs_rmdir,
8513 .mknod = nfs_mknod,
8514 .rename = nfs_rename,
8515 .permission = nfs_permission,
8516 .getattr = nfs_getattr,
8517 .setattr = nfs_setattr,
8518 .getxattr = generic_getxattr,
8519 .setxattr = generic_setxattr,
8520 .listxattr = generic_listxattr,
8521 .removexattr = generic_removexattr,
8522};
8523
92e1d5be 8524static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8525 .permission = nfs_permission,
8526 .getattr = nfs_getattr,
8527 .setattr = nfs_setattr,
64c2ce8b
AK		 8528 .getxattr = generic_getxattr,
8529 .setxattr = generic_setxattr,
8530 .listxattr = generic_listxattr,
8531 .removexattr = generic_removexattr,
6b3b5496
BF		 8532};
8533
509de811 8534const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8535 .version = 4, /* protocol version */
8536 .dentry_ops = &nfs4_dentry_operations,
8537 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8538 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8539 .file_ops = &nfs4_file_operations,
1da177e4 8540 .getroot = nfs4_proc_get_root,
281cad46 8541 .submount = nfs4_submount,
ff9099f2 8542 .try_mount = nfs4_try_mount,
1da177e4
LT		 8543 .getattr = nfs4_proc_getattr,
8544 .setattr = nfs4_proc_setattr,
8545 .lookup = nfs4_proc_lookup,
8546 .access = nfs4_proc_access,
8547 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8548 .create = nfs4_proc_create,
8549 .remove = nfs4_proc_remove,
8550 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8551 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8552 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8553 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8554 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8555 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8556 .link = nfs4_proc_link,
8557 .symlink = nfs4_proc_symlink,
8558 .mkdir = nfs4_proc_mkdir,
8559 .rmdir = nfs4_proc_remove,
8560 .readdir = nfs4_proc_readdir,
8561 .mknod = nfs4_proc_mknod,
8562 .statfs = nfs4_proc_statfs,
8563 .fsinfo = nfs4_proc_fsinfo,
8564 .pathconf = nfs4_proc_pathconf,
e9326dca 8565 .set_capabilities = nfs4_server_capabilities,
1da177e4 8566 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8567 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8568 .read_setup = nfs4_proc_read_setup,
ec06c096 8569 .read_done = nfs4_read_done,
1da177e4 8570 .write_setup = nfs4_proc_write_setup,
788e7a89 8571 .write_done = nfs4_write_done,
1da177e4 8572 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8573 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8574 .commit_done = nfs4_commit_done,
1da177e4 8575 .lock = nfs4_proc_lock,
e50a1c2e 8576 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8577 .close_context = nfs4_close_context,
2b484297 8578 .open_context = nfs4_atomic_open,
011e2a7f 8579 .have_delegation = nfs4_have_delegation,
57ec14c5 8580 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8581 .alloc_client = nfs4_alloc_client,
45a52a02 8582 .init_client = nfs4_init_client,
cdb7eced 8583 .free_client = nfs4_free_client,
1179acc6
BS		 8584 .create_server = nfs4_create_server,
8585 .clone_server = nfs_clone_server,
1da177e4
LT		 8586};
8587
64c2ce8b
AK		 8588static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8589 .prefix = XATTR_NAME_NFSV4_ACL,
8590 .list = nfs4_xattr_list_nfs4_acl,
8591 .get = nfs4_xattr_get_nfs4_acl,
8592 .set = nfs4_xattr_set_nfs4_acl,
8593};
8594
8595const struct xattr_handler *nfs4_xattr_handlers[] = {
8596 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8597#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8598 &nfs4_xattr_nfs4_label_handler,
8599#endif
64c2ce8b
AK		 8600 NULL
8601};
8602
1da177e4
LT		 8603/*
8604 * Local variables:
8605 * c-basic-offset: 8
8606 * End:
8607 */
Linux 6.x block layer and io_uring tree(s)