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nfs: allow different protocol in nfs_initiate_commit
[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
3bd2384a
CL		 498static int nfs40_setup_sequence(const struct nfs_server *server,
499 struct nfs4_sequence_args *args,
500 struct nfs4_sequence_res *res,
501 struct rpc_task *task)
502{
503 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
504 struct nfs4_slot *slot;
505
506 /* slot already allocated? */
507 if (res->sr_slot != NULL)
508 goto out_start;
509
510 spin_lock(&tbl->slot_tbl_lock);
511 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
512 goto out_sleep;
513
514 slot = nfs4_alloc_slot(tbl);
515 if (IS_ERR(slot)) {
516 if (slot == ERR_PTR(-ENOMEM))
517 task->tk_timeout = HZ >> 2;
518 goto out_sleep;
519 }
520 spin_unlock(&tbl->slot_tbl_lock);
521
522 args->sa_slot = slot;
523 res->sr_slot = slot;
524
525out_start:
526 rpc_call_start(task);
527 return 0;
528
529out_sleep:
530 if (args->sa_privileged)
531 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
532 NULL, RPC_PRIORITY_PRIVILEGED);
533 else
534 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
535 spin_unlock(&tbl->slot_tbl_lock);
536 return -EAGAIN;
537}
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
14516c3a
TM		 697static int nfs4_sequence_done(struct rpc_task *task,
698 struct nfs4_sequence_res *res)
df896455 699{
e3725ec0 700 if (res->sr_slot == NULL)
14516c3a 701 return 1;
3bd2384a
CL		 702 if (!res->sr_slot->table->session)
703 return nfs40_sequence_done(task, res);
14516c3a 704 return nfs41_sequence_done(task, res);
df896455
TM		 705}
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
CL		 779 if (!session)
780 return nfs40_setup_sequence(server, args, res, task);
035168ab 781
e8d92382 782 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 783 __func__, session->clp, session, res->sr_slot ?
e8d92382 784 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 785
9d12b216 786 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 787
ce5039c1
AA		 788 dprintk("<-- %s status=%d\n", __func__, ret);
789 return ret;
790}
791
ce5039c1
AA		 792static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
793{
2a3eb2b9 794 struct nfs4_call_sync_data *data = calldata;
6ba7db34 795 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 796
035168ab
TM		 797 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
798
d9afbd1b 799 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 800}
801
69ab40c4
AA		 802static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
803{
2a3eb2b9 804 struct nfs4_call_sync_data *data = calldata;
69ab40c4 805
14516c3a 806 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 807}
808
17280175 809static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 810 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 811 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 812};
813
3bd2384a
CL		 814#else /* !CONFIG_NFS_V4_1 */
815
9915ea7e
CL		 816static int nfs4_setup_sequence(const struct nfs_server *server,
817 struct nfs4_sequence_args *args,
818 struct nfs4_sequence_res *res,
819 struct rpc_task *task)
820{
3bd2384a 821 return nfs40_setup_sequence(server, args, res, task);
9915ea7e
CL		 822}
823
824static int nfs4_sequence_done(struct rpc_task *task,
825 struct nfs4_sequence_res *res)
826{
3bd2384a 827 return nfs40_sequence_done(task, res);
9915ea7e 828}
3bd2384a
CL		 829
830#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 831
832static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
833{
834 struct nfs4_call_sync_data *data = calldata;
835 nfs4_setup_sequence(data->seq_server,
836 data->seq_args, data->seq_res, task);
837}
838
839static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
840{
841 struct nfs4_call_sync_data *data = calldata;
842 nfs4_sequence_done(task, data->seq_res);
843}
844
845static const struct rpc_call_ops nfs40_call_sync_ops = {
846 .rpc_call_prepare = nfs40_call_sync_prepare,
847 .rpc_call_done = nfs40_call_sync_done,
848};
849
7c513058
BS		 850static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
851 struct nfs_server *server,
ce5039c1
AA		 852 struct rpc_message *msg,
853 struct nfs4_sequence_args *args,
8fe72bac 854 struct nfs4_sequence_res *res)
ce5039c1
AA		 855{
856 int ret;
857 struct rpc_task *task;
9915ea7e 858 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 859 struct nfs4_call_sync_data data = {
035168ab 860 .seq_server = server,
ce5039c1
AA		 861 .seq_args = args,
862 .seq_res = res,
ce5039c1
AA		 863 };
864 struct rpc_task_setup task_setup = {
7c513058 865 .rpc_client = clnt,
ce5039c1 866 .rpc_message = msg,
9915ea7e 867 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 868 .callback_data = &data
869 };
870
ce5039c1
AA		 871 task = rpc_run_task(&task_setup);
872 if (IS_ERR(task))
873 ret = PTR_ERR(task);
874 else {
875 ret = task->tk_status;
876 rpc_put_task(task);
877 }
878 return ret;
879}
880
7c513058
BS		 881int nfs4_call_sync(struct rpc_clnt *clnt,
882 struct nfs_server *server,
e73b83f2
BS		 883 struct rpc_message *msg,
884 struct nfs4_sequence_args *args,
885 struct nfs4_sequence_res *res,
886 int cache_reply)
887{
a9c92d6b 888 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 889 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 890}
cccef3b9 891
38478b24 892static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 893{
38478b24 894 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 895
38478b24 896 spin_lock(&dir->i_lock);
359d7d1c 897 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 898 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 899 nfs_force_lookup_revalidate(dir);
a9a4a87a 900 dir->i_version = cinfo->after;
de242c0b 901 nfs_fscache_invalidate(dir);
38478b24 902 spin_unlock(&dir->i_lock);
1da177e4
LT		 903}
904
e56e0b78 905struct nfs4_opendata {
c6d00e63 906 struct kref kref;
e56e0b78
TM		 907 struct nfs_openargs o_arg;
908 struct nfs_openres o_res;
cdd4e68b
TM		 909 struct nfs_open_confirmargs c_arg;
910 struct nfs_open_confirmres c_res;
6926afd1
TM		 911 struct nfs4_string owner_name;
912 struct nfs4_string group_name;
e56e0b78 913 struct nfs_fattr f_attr;
1775fd3e 914 struct nfs4_label *f_label;
e56e0b78 915 struct dentry *dir;
82a2c1b7 916 struct dentry *dentry;
e56e0b78 917 struct nfs4_state_owner *owner;
aac00a8d 918 struct nfs4_state *state;
e56e0b78 919 struct iattr attrs;
26e976a8 920 unsigned long timestamp;
3e309914 921 unsigned int rpc_done : 1;
5bc2afc2 922 unsigned int file_created : 1;
bdeca1b7 923 unsigned int is_recover : 1;
24ac23ab
TM		 924 int rpc_status;
925 int cancelled;
e56e0b78
TM		 926};
927
49f9a0fa
TM		 928static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
929 int err, struct nfs4_exception *exception)
930{
931 if (err != -EINVAL)
932 return false;
933 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
934 return false;
935 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
936 exception->retry = 1;
937 return true;
938}
939
940static enum open_claim_type4
941nfs4_map_atomic_open_claim(struct nfs_server *server,
942 enum open_claim_type4 claim)
943{
944 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
945 return claim;
946 switch (claim) {
947 default:
948 return claim;
949 case NFS4_OPEN_CLAIM_FH:
950 return NFS4_OPEN_CLAIM_NULL;
951 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
952 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
953 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
954 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
955 }
956}
2ced46c2
TM		 957
958static void nfs4_init_opendata_res(struct nfs4_opendata *p)
959{
960 p->o_res.f_attr = &p->f_attr;
1775fd3e 961 p->o_res.f_label = p->f_label;
c1d51931
TM		 962 p->o_res.seqid = p->o_arg.seqid;
963 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 964 p->o_res.server = p->o_arg.server;
5f657530 965 p->o_res.access_request = p->o_arg.access;
2ced46c2 966 nfs_fattr_init(&p->f_attr);
6926afd1 967 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 968}
969
82a2c1b7 970static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 971 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 972 const struct iattr *attrs,
1775fd3e 973 struct nfs4_label *label,
4a1c0893 974 enum open_claim_type4 claim,
8535b2be 975 gfp_t gfp_mask)
e56e0b78 976{
82a2c1b7 977 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 978 struct inode *dir = parent->d_inode;
979 struct nfs_server *server = NFS_SERVER(dir);
980 struct nfs4_opendata *p;
981
8535b2be 982 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 983 if (p == NULL)
984 goto err;
14c43f76
DQ		 985
986 p->f_label = nfs4_label_alloc(server, gfp_mask);
987 if (IS_ERR(p->f_label))
988 goto err_free_p;
989
8535b2be 990 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 991 if (p->o_arg.seqid == NULL)
14c43f76 992 goto err_free_label;
82a2c1b7
AV		 993 nfs_sb_active(dentry->d_sb);
994 p->dentry = dget(dentry);
e56e0b78
TM		 995 p->dir = parent;
996 p->owner = sp;
997 atomic_inc(&sp->so_count);
dc0b027d
TM		 998 p->o_arg.open_flags = flags;
999 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 1000 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1001 * will return permission denied for all bits until close */
1002 if (!(flags & O_EXCL)) {
1003 /* ask server to check for all possible rights as results
1004 * are cached */
1005 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1006 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1007 }
7539bbab 1008 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1009 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1010 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1011 p->o_arg.name = &dentry->d_name;
e56e0b78 1012 p->o_arg.server = server;
aa9c2669 1013 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1014 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1015 p->o_arg.label = label;
49f9a0fa
TM		 1016 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1017 switch (p->o_arg.claim) {
4a1c0893
TM		 1018 case NFS4_OPEN_CLAIM_NULL:
1019 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1020 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1021 p->o_arg.fh = NFS_FH(dir);
1022 break;
1023 case NFS4_OPEN_CLAIM_PREVIOUS:
1024 case NFS4_OPEN_CLAIM_FH:
1025 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1026 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1027 p->o_arg.fh = NFS_FH(dentry->d_inode);
1028 }
536e43d1 1029 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1030 __u32 verf[2];
d77d76ff 1031
e56e0b78
TM		 1032 p->o_arg.u.attrs = &p->attrs;
1033 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1034
1035 verf[0] = jiffies;
1036 verf[1] = current->pid;
1037 memcpy(p->o_arg.u.verifier.data, verf,
1038 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1039 }
cdd4e68b
TM		 1040 p->c_arg.fh = &p->o_res.fh;
1041 p->c_arg.stateid = &p->o_res.stateid;
1042 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1043 nfs4_init_opendata_res(p);
c6d00e63 1044 kref_init(&p->kref);
e56e0b78 1045 return p;
14c43f76
DQ		 1046
1047err_free_label:
1048 nfs4_label_free(p->f_label);
1049err_free_p:
e56e0b78
TM		 1050 kfree(p);
1051err:
1052 dput(parent);
1053 return NULL;
1054}
1055
c6d00e63 1056static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1057{
c6d00e63
TM		 1058 struct nfs4_opendata *p = container_of(kref,
1059 struct nfs4_opendata, kref);
82a2c1b7 1060 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1061
1062 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1063 if (p->state != NULL)
1064 nfs4_put_open_state(p->state);
c6d00e63 1065 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1066
1067 nfs4_label_free(p->f_label);
1068
c6d00e63 1069 dput(p->dir);
82a2c1b7
AV		 1070 dput(p->dentry);
1071 nfs_sb_deactive(sb);
6926afd1 1072 nfs_fattr_free_names(&p->f_attr);
e911b815 1073 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1074 kfree(p);
1075}
1076
1077static void nfs4_opendata_put(struct nfs4_opendata *p)
1078{
1079 if (p != NULL)
1080 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1081}
1082
06f814a3
TM		 1083static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1084{
06f814a3
TM		 1085 int ret;
1086
06f814a3 1087 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1088 return ret;
1089}
1090
dc0b027d 1091static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1092{
1093 int ret = 0;
dc0b027d 1094
536e43d1 1095 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1096 goto out;
1097 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1098 case FMODE_READ:
88069f77
TM		 1099 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1100 && state->n_rdonly != 0;
6ee41268
TM		 1101 break;
1102 case FMODE_WRITE:
88069f77
TM		 1103 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1104 && state->n_wronly != 0;
6ee41268
TM		 1105 break;
1106 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1107 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1108 && state->n_rdwr != 0;
6ee41268 1109 }
dc0b027d 1110out:
6ee41268
TM		 1111 return ret;
1112}
1113
dc0b027d 1114static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1115{
652f89f6
TM		 1116 if (delegation == NULL)
1117 return 0;
dc0b027d 1118 if ((delegation->type & fmode) != fmode)
aac00a8d 1119 return 0;
d25be546
TM		 1120 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1121 return 0;
b7391f44 1122 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1123 return 1;
1124}
1125
dc0b027d 1126static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1127{
dc0b027d 1128 switch (fmode) {
e7616923
TM		 1129 case FMODE_WRITE:
1130 state->n_wronly++;
1131 break;
1132 case FMODE_READ:
1133 state->n_rdonly++;
1134 break;
1135 case FMODE_READ|FMODE_WRITE:
1136 state->n_rdwr++;
1137 }
dc0b027d 1138 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1139}
1140
4f14c194
TM		 1141static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1142{
1143 struct nfs_client *clp = state->owner->so_server->nfs_client;
1144 bool need_recover = false;
1145
1146 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1147 need_recover = true;
1148 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1149 need_recover = true;
1150 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1151 need_recover = true;
1152 if (need_recover)
1153 nfs4_state_mark_reclaim_nograce(clp, state);
1154}
1155
e999e80e
TM		 1156static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1157 nfs4_stateid *stateid)
1158{
1159 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1160 return true;
4f14c194
TM		 1161 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1162 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1163 return true;
4f14c194 1164 }
e999e80e
TM		 1165 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1166 return true;
1167 return false;
1168}
1169
226056c5
TM		 1170static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1171 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1172{
226056c5
TM		 1173 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1174 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1175 case FMODE_WRITE:
1176 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1177 break;
1178 case FMODE_READ:
1179 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1180 break;
1181 case 0:
1182 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1183 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1184 clear_bit(NFS_OPEN_STATE, &state->flags);
1185 }
1186 if (stateid == NULL)
1187 return;
1188 if (!nfs_need_update_open_stateid(state, stateid))
1189 return;
003707c7 1190 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1191 nfs4_stateid_copy(&state->stateid, stateid);
1192 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1193}
1194
1195static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1196{
1197 write_seqlock(&state->seqlock);
1198 nfs_clear_open_stateid_locked(state, stateid, fmode);
1199 write_sequnlock(&state->seqlock);
4f14c194
TM		 1200 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1201 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1202}
1203
dc0b027d 1204static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1205{
dc0b027d 1206 switch (fmode) {
003707c7
TM		 1207 case FMODE_READ:
1208 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1209 break;
1210 case FMODE_WRITE:
1211 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1212 break;
1213 case FMODE_READ|FMODE_WRITE:
1214 set_bit(NFS_O_RDWR_STATE, &state->flags);
1215 }
e999e80e
TM		 1216 if (!nfs_need_update_open_stateid(state, stateid))
1217 return;
1218 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1219 nfs4_stateid_copy(&state->stateid, stateid);
1220 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1221}
1222
dc0b027d 1223static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1224{
8bda4e4c
TM		 1225 /*
1226 * Protect the call to nfs4_state_set_mode_locked and
1227 * serialise the stateid update
1228 */
1229 write_seqlock(&state->seqlock);
003707c7 1230 if (deleg_stateid != NULL) {
f597c537 1231 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1232 set_bit(NFS_DELEGATED_STATE, &state->flags);
1233 }
1234 if (open_stateid != NULL)
dc0b027d 1235 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1236 write_sequnlock(&state->seqlock);
1237 spin_lock(&state->owner->so_lock);
dc0b027d 1238 update_open_stateflags(state, fmode);
ec073428 1239 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1240}
1241
dc0b027d 1242static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1243{
1244 struct nfs_inode *nfsi = NFS_I(state->inode);
1245 struct nfs_delegation *deleg_cur;
1246 int ret = 0;
1247
dc0b027d 1248 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1249
1250 rcu_read_lock();
1251 deleg_cur = rcu_dereference(nfsi->delegation);
1252 if (deleg_cur == NULL)
1253 goto no_delegation;
1254
1255 spin_lock(&deleg_cur->lock);
17f26b12 1256 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1257 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1258 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1259 goto no_delegation_unlock;
1260
1261 if (delegation == NULL)
1262 delegation = &deleg_cur->stateid;
f597c537 1263 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1264 goto no_delegation_unlock;
1265
b7391f44 1266 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1267 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1268 ret = 1;
1269no_delegation_unlock:
1270 spin_unlock(&deleg_cur->lock);
1271no_delegation:
1272 rcu_read_unlock();
1273
1274 if (!ret && open_stateid != NULL) {
dc0b027d 1275 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1276 ret = 1;
1277 }
4f14c194
TM		 1278 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1279 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1280
1281 return ret;
1282}
1283
1284
dc0b027d 1285static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1286{
1287 struct nfs_delegation *delegation;
1288
1289 rcu_read_lock();
1290 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1291 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1292 rcu_read_unlock();
1293 return;
1294 }
1295 rcu_read_unlock();
57ec14c5 1296 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1297}
1298
6ee41268 1299static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1300{
1301 struct nfs4_state *state = opendata->state;
1302 struct nfs_inode *nfsi = NFS_I(state->inode);
1303 struct nfs_delegation *delegation;
f448badd 1304 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1305 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1306 nfs4_stateid stateid;
1307 int ret = -EAGAIN;
1308
aac00a8d 1309 for (;;) {
61beef75 1310 spin_lock(&state->owner->so_lock);
dc0b027d 1311 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1312 update_open_stateflags(state, fmode);
6ee41268 1313 spin_unlock(&state->owner->so_lock);
61beef75 1314 goto out_return_state;
6ee41268 1315 }
61beef75 1316 spin_unlock(&state->owner->so_lock);
34310430
TM		 1317 rcu_read_lock();
1318 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1319 if (!can_open_delegated(delegation, fmode)) {
34310430 1320 rcu_read_unlock();
aac00a8d 1321 break;
34310430 1322 }
aac00a8d 1323 /* Save the delegation */
f597c537 1324 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1325 rcu_read_unlock();
fa332941 1326 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1327 if (!opendata->is_recover) {
1328 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1329 if (ret != 0)
1330 goto out;
1331 }
aac00a8d 1332 ret = -EAGAIN;
34310430
TM		 1333
1334 /* Try to update the stateid using the delegation */
dc0b027d 1335 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1336 goto out_return_state;
aac00a8d 1337 }
aac00a8d
TM		 1338out:
1339 return ERR_PTR(ret);
1340out_return_state:
1341 atomic_inc(&state->count);
1342 return state;
1343}
1344
e23008ec
AA		 1345static void
1346nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1347{
1348 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1349 struct nfs_delegation *delegation;
1350 int delegation_flags = 0;
1351
1352 rcu_read_lock();
1353 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1354 if (delegation)
1355 delegation_flags = delegation->flags;
1356 rcu_read_unlock();
1357 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1358 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1359 "returning a delegation for "
1360 "OPEN(CLAIM_DELEGATE_CUR)\n",
1361 clp->cl_hostname);
1362 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1363 nfs_inode_set_delegation(state->inode,
1364 data->owner->so_cred,
1365 &data->o_res);
1366 else
1367 nfs_inode_reclaim_delegation(state->inode,
1368 data->owner->so_cred,
1369 &data->o_res);
1370}
1371
1372/*
1373 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1374 * and update the nfs4_state.
1375 */
1376static struct nfs4_state *
1377_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1378{
1379 struct inode *inode = data->state->inode;
1380 struct nfs4_state *state = data->state;
1381 int ret;
1382
d2bfda2e
WAA		 1383 if (!data->rpc_done) {
1384 if (data->rpc_status) {
1385 ret = data->rpc_status;
1386 goto err;
1387 }
1388 /* cached opens have already been processed */
1389 goto update;
e23008ec
AA		 1390 }
1391
e23008ec
AA		 1392 ret = nfs_refresh_inode(inode, &data->f_attr);
1393 if (ret)
1394 goto err;
1395
1396 if (data->o_res.delegation_type != 0)
1397 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1398update:
e23008ec
AA		 1399 update_open_stateid(state, &data->o_res.stateid, NULL,
1400 data->o_arg.fmode);
d49f042a 1401 atomic_inc(&state->count);
e23008ec
AA		 1402
1403 return state;
1404err:
1405 return ERR_PTR(ret);
1406
1407}
1408
1409static struct nfs4_state *
1410_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1411{
1412 struct inode *inode;
1413 struct nfs4_state *state = NULL;
1b370bc2 1414 int ret;
24ac23ab 1415
aac00a8d 1416 if (!data->rpc_done) {
6ee41268 1417 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1418 goto out;
1419 }
1420
1b370bc2 1421 ret = -EAGAIN;
24ac23ab 1422 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1423 goto err;
1775fd3e 1424 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1425 ret = PTR_ERR(inode);
03f28e3a 1426 if (IS_ERR(inode))
1b370bc2
TM		 1427 goto err;
1428 ret = -ENOMEM;
24ac23ab
TM		 1429 state = nfs4_get_open_state(inode, data->owner);
1430 if (state == NULL)
1b370bc2 1431 goto err_put_inode;
e23008ec
AA		 1432 if (data->o_res.delegation_type != 0)
1433 nfs4_opendata_check_deleg(data, state);
34310430 1434 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1435 data->o_arg.fmode);
24ac23ab 1436 iput(inode);
aac00a8d 1437out:
7aa262b5 1438 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1439 return state;
1b370bc2
TM		 1440err_put_inode:
1441 iput(inode);
1442err:
1443 return ERR_PTR(ret);
24ac23ab
TM		 1444}
1445
e23008ec
AA		 1446static struct nfs4_state *
1447nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1448{
1449 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1450 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1451 return _nfs4_opendata_to_nfs4_state(data);
1452}
1453
864472e9
TM		 1454static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1455{
1456 struct nfs_inode *nfsi = NFS_I(state->inode);
1457 struct nfs_open_context *ctx;
1458
1459 spin_lock(&state->inode->i_lock);
1460 list_for_each_entry(ctx, &nfsi->open_files, list) {
1461 if (ctx->state != state)
1462 continue;
1463 get_nfs_open_context(ctx);
1464 spin_unlock(&state->inode->i_lock);
1465 return ctx;
1466 }
1467 spin_unlock(&state->inode->i_lock);
1468 return ERR_PTR(-ENOENT);
1469}
1470
4a1c0893
TM		 1471static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1472 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1473{
1474 struct nfs4_opendata *opendata;
1475
4a1c0893 1476 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1477 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1478 if (opendata == NULL)
1479 return ERR_PTR(-ENOMEM);
1480 opendata->state = state;
1481 atomic_inc(&state->count);
1482 return opendata;
1483}
1484
dc0b027d 1485static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1486{
2ced46c2 1487 struct nfs4_state *newstate;
864472e9
TM		 1488 int ret;
1489
dc0b027d
TM		 1490 opendata->o_arg.open_flags = 0;
1491 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1492 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1493 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1494 nfs4_init_opendata_res(opendata);
b257957e 1495 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1496 if (ret != 0)
1497 return ret;
2ced46c2 1498 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1499 if (IS_ERR(newstate))
1500 return PTR_ERR(newstate);
643168c2 1501 nfs4_close_state(newstate, fmode);
2ced46c2 1502 *res = newstate;
864472e9
TM		 1503 return 0;
1504}
1505
1506static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1507{
864472e9 1508 struct nfs4_state *newstate;
864472e9
TM		 1509 int ret;
1510
4f14c194
TM		 1511 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1512 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1513 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1514 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1515 /* memory barrier prior to reading state->n_* */
2ced46c2 1516 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1517 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1518 smp_rmb();
1519 if (state->n_rdwr != 0) {
2ced46c2 1520 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1521 if (ret != 0)
1522 return ret;
2ced46c2
TM		 1523 if (newstate != state)
1524 return -ESTALE;
864472e9
TM		 1525 }
1526 if (state->n_wronly != 0) {
2ced46c2 1527 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1528 if (ret != 0)
1529 return ret;
2ced46c2
TM		 1530 if (newstate != state)
1531 return -ESTALE;
864472e9
TM		 1532 }
1533 if (state->n_rdonly != 0) {
2ced46c2 1534 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1535 if (ret != 0)
1536 return ret;
2ced46c2
TM		 1537 if (newstate != state)
1538 return -ESTALE;
864472e9 1539 }
1ac7e2fd
TM		 1540 /*
1541 * We may have performed cached opens for all three recoveries.
1542 * Check if we need to update the current stateid.
1543 */
1544 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1545 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1546 write_seqlock(&state->seqlock);
1ac7e2fd 1547 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1548 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1549 write_sequnlock(&state->seqlock);
1ac7e2fd 1550 }
864472e9
TM		 1551 return 0;
1552}
1553
1da177e4
LT		 1554/*
1555 * OPEN_RECLAIM:
1556 * reclaim state on the server after a reboot.
1da177e4 1557 */
539cd03a 1558static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1559{
1ac7e2fd 1560 struct nfs_delegation *delegation;
864472e9 1561 struct nfs4_opendata *opendata;
dc0b027d 1562 fmode_t delegation_type = 0;
1da177e4
LT		 1563 int status;
1564
4a1c0893
TM		 1565 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1566 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1567 if (IS_ERR(opendata))
1568 return PTR_ERR(opendata);
1ac7e2fd
TM		 1569 rcu_read_lock();
1570 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1571 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1572 delegation_type = delegation->type;
1ac7e2fd 1573 rcu_read_unlock();
864472e9
TM		 1574 opendata->o_arg.u.delegation_type = delegation_type;
1575 status = nfs4_open_recover(opendata, state);
c6d00e63 1576 nfs4_opendata_put(opendata);
1da177e4
LT		 1577 return status;
1578}
1579
539cd03a 1580static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1581{
1582 struct nfs_server *server = NFS_SERVER(state->inode);
1583 struct nfs4_exception exception = { };
1584 int err;
1585 do {
539cd03a 1586 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1587 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1588 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1589 continue;
168667c4 1590 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1591 break;
1592 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1593 } while (exception.retry);
1594 return err;
1595}
1596
864472e9
TM		 1597static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1598{
1599 struct nfs_open_context *ctx;
1600 int ret;
1601
1602 ctx = nfs4_state_find_open_context(state);
1603 if (IS_ERR(ctx))
91876b13 1604 return -EAGAIN;
539cd03a 1605 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1606 put_nfs_open_context(ctx);
1607 return ret;
1608}
1609
db4f2e63 1610static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1611{
be76b5b6
TM		 1612 switch (err) {
1613 default:
1614 printk(KERN_ERR "NFS: %s: unhandled error "
1615 "%d.\n", __func__, err);
1616 case 0:
1617 case -ENOENT:
1618 case -ESTALE:
1619 break;
1620 case -NFS4ERR_BADSESSION:
1621 case -NFS4ERR_BADSLOT:
1622 case -NFS4ERR_BAD_HIGH_SLOT:
1623 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1624 case -NFS4ERR_DEADSESSION:
1625 set_bit(NFS_DELEGATED_STATE, &state->flags);
1626 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1627 return -EAGAIN;
1628 case -NFS4ERR_STALE_CLIENTID:
1629 case -NFS4ERR_STALE_STATEID:
1630 set_bit(NFS_DELEGATED_STATE, &state->flags);
1631 case -NFS4ERR_EXPIRED:
1632 /* Don't recall a delegation if it was lost */
1633 nfs4_schedule_lease_recovery(server->nfs_client);
1634 return -EAGAIN;
352297b9
CL		 1635 case -NFS4ERR_MOVED:
1636 nfs4_schedule_migration_recovery(server);
1637 return -EAGAIN;
8ef2f8d4
CL		 1638 case -NFS4ERR_LEASE_MOVED:
1639 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1640 return -EAGAIN;
be76b5b6
TM		 1641 case -NFS4ERR_DELEG_REVOKED:
1642 case -NFS4ERR_ADMIN_REVOKED:
1643 case -NFS4ERR_BAD_STATEID:
db4f2e63 1644 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1645 nfs_inode_find_state_and_recover(state->inode,
1646 stateid);
1647 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1648 return -EAGAIN;
be76b5b6
TM		 1649 case -NFS4ERR_DELAY:
1650 case -NFS4ERR_GRACE:
1651 set_bit(NFS_DELEGATED_STATE, &state->flags);
1652 ssleep(1);
1653 return -EAGAIN;
db4f2e63
TM		 1654 case -ENOMEM:
1655 case -NFS4ERR_DENIED:
1656 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1657 return 0;
be76b5b6 1658 }
1da177e4
LT		 1659 return err;
1660}
1661
db4f2e63
TM		 1662int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1663{
1664 struct nfs_server *server = NFS_SERVER(state->inode);
1665 struct nfs4_opendata *opendata;
1666 int err;
1667
1668 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1669 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1670 if (IS_ERR(opendata))
1671 return PTR_ERR(opendata);
1672 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1673 err = nfs4_open_recover(opendata, state);
1674 nfs4_opendata_put(opendata);
1675 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1676}
1677
be05c860
CL		 1678static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1679{
1680 struct nfs4_opendata *data = calldata;
1681
17ead6c8
TM		 1682 nfs40_setup_sequence(data->o_arg.server, &data->c_arg.seq_args,
1683 &data->c_res.seq_res, task);
be05c860
CL		 1684}
1685
cdd4e68b
TM		 1686static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1687{
1688 struct nfs4_opendata *data = calldata;
1689
17ead6c8 1690 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1691
cdd4e68b 1692 data->rpc_status = task->tk_status;
26e976a8 1693 if (data->rpc_status == 0) {
f597c537 1694 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1695 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1696 renew_lease(data->o_res.server, data->timestamp);
3e309914 1697 data->rpc_done = 1;
26e976a8 1698 }
cdd4e68b
TM		 1699}
1700
1701static void nfs4_open_confirm_release(void *calldata)
1702{
1703 struct nfs4_opendata *data = calldata;
1704 struct nfs4_state *state = NULL;
1705
1706 /* If this request hasn't been cancelled, do nothing */
1707 if (data->cancelled == 0)
1708 goto out_free;
1709 /* In case of error, no cleanup! */
3e309914 1710 if (!data->rpc_done)
cdd4e68b 1711 goto out_free;
cdd4e68b 1712 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1713 if (!IS_ERR(state))
643168c2 1714 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1715out_free:
c6d00e63 1716 nfs4_opendata_put(data);
cdd4e68b
TM		 1717}
1718
1719static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1720 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1721 .rpc_call_done = nfs4_open_confirm_done,
1722 .rpc_release = nfs4_open_confirm_release,
1723};
1724
1725/*
1726 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1727 */
1728static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1729{
1730 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1731 struct rpc_task *task;
5138fde0
TM		 1732 struct rpc_message msg = {
1733 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1734 .rpc_argp = &data->c_arg,
1735 .rpc_resp = &data->c_res,
1736 .rpc_cred = data->owner->so_cred,
1737 };
c970aa85
TM		 1738 struct rpc_task_setup task_setup_data = {
1739 .rpc_client = server->client,
5138fde0 1740 .rpc_message = &msg,
c970aa85
TM		 1741 .callback_ops = &nfs4_open_confirm_ops,
1742 .callback_data = data,
101070ca 1743 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1744 .flags = RPC_TASK_ASYNC,
1745 };
1da177e4
LT		 1746 int status;
1747
17ead6c8 1748 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1749 kref_get(&data->kref);
3e309914
TM		 1750 data->rpc_done = 0;
1751 data->rpc_status = 0;
5138fde0 1752 data->timestamp = jiffies;
c970aa85 1753 task = rpc_run_task(&task_setup_data);
7a1218a2 1754 if (IS_ERR(task))
cdd4e68b 1755 return PTR_ERR(task);
cdd4e68b
TM		 1756 status = nfs4_wait_for_completion_rpc_task(task);
1757 if (status != 0) {
1758 data->cancelled = 1;
1759 smp_wmb();
1760 } else
1761 status = data->rpc_status;
e6b3c4db 1762 rpc_put_task(task);
1da177e4
LT		 1763 return status;
1764}
1765
24ac23ab 1766static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1767{
24ac23ab
TM		 1768 struct nfs4_opendata *data = calldata;
1769 struct nfs4_state_owner *sp = data->owner;
549b19cc 1770 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1771
24ac23ab 1772 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1773 goto out_wait;
aac00a8d
TM		 1774 /*
1775 * Check if we still need to send an OPEN call, or if we can use
1776 * a delegation instead.
1777 */
1778 if (data->state != NULL) {
1779 struct nfs_delegation *delegation;
1780
dc0b027d 1781 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1782 goto out_no_action;
aac00a8d
TM		 1783 rcu_read_lock();
1784 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1785 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1786 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1787 can_open_delegated(delegation, data->o_arg.fmode))
1788 goto unlock_no_action;
aac00a8d
TM		 1789 rcu_read_unlock();
1790 }
95b72eb0 1791 /* Update client id. */
549b19cc 1792 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1793 switch (data->o_arg.claim) {
1794 case NFS4_OPEN_CLAIM_PREVIOUS:
1795 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1796 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1797 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1798 case NFS4_OPEN_CLAIM_FH:
1799 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1800 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1801 }
26e976a8 1802 data->timestamp = jiffies;
035168ab 1803 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1804 &data->o_arg.seq_args,
2240a9e2
TM		 1805 &data->o_res.seq_res,
1806 task) != 0)
1807 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1808
1809 /* Set the create mode (note dependency on the session type) */
1810 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1811 if (data->o_arg.open_flags & O_EXCL) {
1812 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1813 if (nfs4_has_persistent_session(clp))
1814 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1815 else if (clp->cl_mvops->minor_version > 0)
1816 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1817 }
6ee41268 1818 return;
652f89f6
TM		 1819unlock_no_action:
1820 rcu_read_unlock();
6ee41268
TM		 1821out_no_action:
1822 task->tk_action = NULL;
c8da19b9 1823out_wait:
b75ad4cd 1824 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1825}
1826
24ac23ab
TM		 1827static void nfs4_open_done(struct rpc_task *task, void *calldata)
1828{
1829 struct nfs4_opendata *data = calldata;
1da177e4 1830
24ac23ab 1831 data->rpc_status = task->tk_status;
d898528c 1832
14516c3a
TM		 1833 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1834 return;
d898528c 1835
24ac23ab 1836 if (task->tk_status == 0) {
807d66d8
TM		 1837 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1838 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1839 case S_IFREG:
1840 break;
1841 case S_IFLNK:
24ac23ab 1842 data->rpc_status = -ELOOP;
6f926b5b
TM		 1843 break;
1844 case S_IFDIR:
24ac23ab 1845 data->rpc_status = -EISDIR;
6f926b5b
TM		 1846 break;
1847 default:
24ac23ab 1848 data->rpc_status = -ENOTDIR;
807d66d8 1849 }
6f926b5b 1850 }
26e976a8 1851 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1852 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1853 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1854 }
3e309914 1855 data->rpc_done = 1;
24ac23ab 1856}
6f926b5b 1857
24ac23ab
TM		 1858static void nfs4_open_release(void *calldata)
1859{
1860 struct nfs4_opendata *data = calldata;
1861 struct nfs4_state *state = NULL;
1862
1863 /* If this request hasn't been cancelled, do nothing */
1864 if (data->cancelled == 0)
1865 goto out_free;
1866 /* In case of error, no cleanup! */
3e309914 1867 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1868 goto out_free;
1869 /* In case we need an open_confirm, no cleanup! */
1870 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1871 goto out_free;
24ac23ab 1872 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1873 if (!IS_ERR(state))
643168c2 1874 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1875out_free:
c6d00e63 1876 nfs4_opendata_put(data);
24ac23ab
TM		 1877}
1878
1879static const struct rpc_call_ops nfs4_open_ops = {
1880 .rpc_call_prepare = nfs4_open_prepare,
1881 .rpc_call_done = nfs4_open_done,
1882 .rpc_release = nfs4_open_release,
1883};
1884
b257957e 1885static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1886{
1887 struct inode *dir = data->dir->d_inode;
1888 struct nfs_server *server = NFS_SERVER(dir);
1889 struct nfs_openargs *o_arg = &data->o_arg;
1890 struct nfs_openres *o_res = &data->o_res;
1891 struct rpc_task *task;
5138fde0
TM		 1892 struct rpc_message msg = {
1893 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1894 .rpc_argp = o_arg,
1895 .rpc_resp = o_res,
1896 .rpc_cred = data->owner->so_cred,
1897 };
c970aa85
TM		 1898 struct rpc_task_setup task_setup_data = {
1899 .rpc_client = server->client,
5138fde0 1900 .rpc_message = &msg,
c970aa85
TM		 1901 .callback_ops = &nfs4_open_ops,
1902 .callback_data = data,
101070ca 1903 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1904 .flags = RPC_TASK_ASYNC,
1905 };
24ac23ab
TM		 1906 int status;
1907
a9c92d6b 1908 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1909 kref_get(&data->kref);
3e309914
TM		 1910 data->rpc_done = 0;
1911 data->rpc_status = 0;
2ced46c2 1912 data->cancelled = 0;
bdeca1b7
TM		 1913 data->is_recover = 0;
1914 if (isrecover) {
8fe72bac 1915 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1916 data->is_recover = 1;
1917 }
c970aa85 1918 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1919 if (IS_ERR(task))
1920 return PTR_ERR(task);
1921 status = nfs4_wait_for_completion_rpc_task(task);
1922 if (status != 0) {
1923 data->cancelled = 1;
1924 smp_wmb();
1925 } else
1926 status = data->rpc_status;
1927 rpc_put_task(task);
1928
1929 return status;
1930}
1931
1932static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1933{
1934 struct inode *dir = data->dir->d_inode;
1935 struct nfs_openres *o_res = &data->o_res;
1936 int status;
1937
1938 status = nfs4_run_open_task(data, 1);
1939 if (status != 0 || !data->rpc_done)
1940 return status;
1941
6926afd1
TM		 1942 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1943
b257957e
AB		 1944 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1945 status = _nfs4_proc_open_confirm(data);
1946 if (status != 0)
1947 return status;
1948 }
1949
1950 return status;
1951}
1952
f3792d63
TM		 1953/*
1954 * Additional permission checks in order to distinguish between an
1955 * open for read, and an open for execute. This works around the
1956 * fact that NFSv4 OPEN treats read and execute permissions as being
1957 * the same.
1958 * Note that in the non-execute case, we want to turn off permission
1959 * checking if we just created a new file (POSIX open() semantics).
1960 */
6168f62c
WAA		 1961static int nfs4_opendata_access(struct rpc_cred *cred,
1962 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1963 struct nfs4_state *state, fmode_t fmode,
1964 int openflags)
6168f62c
WAA		 1965{
1966 struct nfs_access_entry cache;
1967 u32 mask;
1968
1969 /* access call failed or for some reason the server doesn't
1970 * support any access modes -- defer access call until later */
1971 if (opendata->o_res.access_supported == 0)
1972 return 0;
1973
1974 mask = 0;
f3792d63
TM		 1975 /*
1976 * Use openflags to check for exec, because fmode won't
1977 * always have FMODE_EXEC set when file open for exec.
1978 */
f8d9a897
WAA		 1979 if (openflags & __FMODE_EXEC) {
1980 /* ONLY check for exec rights */
1981 mask = MAY_EXEC;
f3792d63 1982 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 1983 mask = MAY_READ;
6168f62c
WAA		 1984
1985 cache.cred = cred;
1986 cache.jiffies = jiffies;
1987 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1988 nfs_access_add_cache(state->inode, &cache);
1989
bbd3a8ee 1990 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1991 return 0;
1992
1993 /* even though OPEN succeeded, access is denied. Close the file */
1994 nfs4_close_state(state, fmode);
998f40b5 1995 return -EACCES;
6168f62c
WAA		 1996}
1997
b257957e
AB		 1998/*
1999 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2000 */
2001static int _nfs4_proc_open(struct nfs4_opendata *data)
2002{
2003 struct inode *dir = data->dir->d_inode;
2004 struct nfs_server *server = NFS_SERVER(dir);
2005 struct nfs_openargs *o_arg = &data->o_arg;
2006 struct nfs_openres *o_res = &data->o_res;
2007 int status;
2008
2009 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2010 if (!data->rpc_done)
2011 return status;
2012 if (status != 0) {
2013 if (status == -NFS4ERR_BADNAME &&
2014 !(o_arg->open_flags & O_CREAT))
2015 return -ENOENT;
24ac23ab 2016 return status;
08ef7bd3 2017 }
24ac23ab 2018
6926afd1
TM		 2019 nfs_fattr_map_and_free_names(server, &data->f_attr);
2020
5bc2afc2 2021 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2022 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2023 if (o_arg->open_flags & O_EXCL)
2024 data->file_created = 1;
2025 else if (o_res->cinfo.before != o_res->cinfo.after)
2026 data->file_created = 1;
2027 }
0df5dd4a
TM		 2028 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2029 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2030 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2031 status = _nfs4_proc_open_confirm(data);
1da177e4 2032 if (status != 0)
24ac23ab 2033 return status;
1da177e4
LT		 2034 }
2035 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2036 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2037 return 0;
1da177e4
LT		 2038}
2039
d83217c1
AA		 2040static int nfs4_recover_expired_lease(struct nfs_server *server)
2041{
2042 return nfs4_client_recover_expired_lease(server->nfs_client);
2043}
2044
1da177e4
LT		 2045/*
2046 * OPEN_EXPIRED:
2047 * reclaim state on the server after a network partition.
2048 * Assumes caller holds the appropriate lock
2049 */
539cd03a 2050static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2051{
e56e0b78 2052 struct nfs4_opendata *opendata;
864472e9 2053 int ret;
1da177e4 2054
4a1c0893 2055 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2056 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2057 if (IS_ERR(opendata))
2058 return PTR_ERR(opendata);
864472e9 2059 ret = nfs4_open_recover(opendata, state);
35d05778 2060 if (ret == -ESTALE)
3d4ff43d 2061 d_drop(ctx->dentry);
c6d00e63 2062 nfs4_opendata_put(opendata);
864472e9 2063 return ret;
1da177e4
LT		 2064}
2065
a9ed2e25 2066static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2067{
539cd03a 2068 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2069 struct nfs4_exception exception = { };
2070 int err;
2071
2072 do {
539cd03a 2073 err = _nfs4_open_expired(ctx, state);
42113a75 2074 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2075 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2076 continue;
a9ed2e25
TM		 2077 switch (err) {
2078 default:
2079 goto out;
2080 case -NFS4ERR_GRACE:
2081 case -NFS4ERR_DELAY:
2082 nfs4_handle_exception(server, err, &exception);
2083 err = 0;
2084 }
202b50dc 2085 } while (exception.retry);
a9ed2e25 2086out:
202b50dc
TM		 2087 return err;
2088}
2089
1da177e4
LT		 2090static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2091{
1da177e4 2092 struct nfs_open_context *ctx;
864472e9 2093 int ret;
1da177e4 2094
864472e9
TM		 2095 ctx = nfs4_state_find_open_context(state);
2096 if (IS_ERR(ctx))
91876b13 2097 return -EAGAIN;
539cd03a 2098 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2099 put_nfs_open_context(ctx);
2100 return ret;
1da177e4
LT		 2101}
2102
4dfd4f7a
TM		 2103static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2104{
2105 nfs_remove_bad_delegation(state->inode);
2106 write_seqlock(&state->seqlock);
2107 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2108 write_sequnlock(&state->seqlock);
2109 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2110}
2111
2112static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2113{
2114 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2115 nfs_finish_clear_delegation_stateid(state);
2116}
2117
2118static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2119{
2120 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2121 nfs40_clear_delegation_stateid(state);
2122 return nfs4_open_expired(sp, state);
2123}
2124
f062eb6c 2125#if defined(CONFIG_NFS_V4_1)
0c116cad 2126static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2127{
f062eb6c 2128 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2129 nfs4_stateid stateid;
ab7cb0df 2130 struct nfs_delegation *delegation;
0c116cad
TM		 2131 struct rpc_cred *cred;
2132 int status;
3e60ffdd 2133
ab7cb0df
TM		 2134 /* Get the delegation credential for use by test/free_stateid */
2135 rcu_read_lock();
2136 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2137 if (delegation == NULL) {
ab7cb0df 2138 rcu_read_unlock();
0c116cad
TM		 2139 return;
2140 }
2141
2142 nfs4_stateid_copy(&stateid, &delegation->stateid);
2143 cred = get_rpccred(delegation->cred);
2144 rcu_read_unlock();
2145 status = nfs41_test_stateid(server, &stateid, cred);
2146 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2147
3e60ffdd
CL		 2148 if (status != NFS_OK) {
2149 /* Free the stateid unless the server explicitly
2150 * informs us the stateid is unrecognized. */
2151 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2152 nfs41_free_stateid(server, &stateid, cred);
2153 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2154 }
ab7cb0df 2155
0c116cad 2156 put_rpccred(cred);
3e60ffdd
CL		 2157}
2158
2159/**
2160 * nfs41_check_open_stateid - possibly free an open stateid
2161 *
2162 * @state: NFSv4 state for an inode
2163 *
2164 * Returns NFS_OK if recovery for this stateid is now finished.
2165 * Otherwise a negative NFS4ERR value is returned.
2166 */
2167static int nfs41_check_open_stateid(struct nfs4_state *state)
2168{
2169 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2170 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2171 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2172 int status;
2173
2174 /* If a state reset has been done, test_stateid is unneeded */
2175 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2176 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2177 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2178 return -NFS4ERR_BAD_STATEID;
2179
ab7cb0df 2180 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2181 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2182 if (status != NFS_OK) {
2183 /* Free the stateid unless the server explicitly
2184 * informs us the stateid is unrecognized. */
2185 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2186 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2187
2188 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2189 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2190 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2191 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2192 }
2193 return status;
2194}
2195
2196static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2197{
eb64cf96 2198 int status;
b01dd1d8 2199
0c116cad 2200 nfs41_check_delegation_stateid(state);
3e60ffdd 2201 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2202 if (status != NFS_OK)
2203 status = nfs4_open_expired(sp, state);
2204 return status;
f062eb6c
BS		 2205}
2206#endif
2207
aa53ed54
JL		 2208/*
2209 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2210 * fields corresponding to attributes that were used to store the verifier.
2211 * Make sure we clobber those fields in the later setattr call
2212 */
2213static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2214{
2215 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2216 !(sattr->ia_valid & ATTR_ATIME_SET))
2217 sattr->ia_valid |= ATTR_ATIME;
2218
2219 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2220 !(sattr->ia_valid & ATTR_MTIME_SET))
2221 sattr->ia_valid |= ATTR_MTIME;
2222}
2223
c21443c2
TM		 2224static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2225 fmode_t fmode,
2226 int flags,
3efb9722 2227 struct nfs_open_context *ctx)
c21443c2
TM		 2228{
2229 struct nfs4_state_owner *sp = opendata->owner;
2230 struct nfs_server *server = sp->so_server;
275bb307 2231 struct dentry *dentry;
c21443c2
TM		 2232 struct nfs4_state *state;
2233 unsigned int seq;
2234 int ret;
2235
2236 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2237
2238 ret = _nfs4_proc_open(opendata);
dca78001 2239 if (ret != 0)
c21443c2
TM		 2240 goto out;
2241
2242 state = nfs4_opendata_to_nfs4_state(opendata);
2243 ret = PTR_ERR(state);
2244 if (IS_ERR(state))
2245 goto out;
2246 if (server->caps & NFS_CAP_POSIX_LOCK)
2247 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2248
275bb307
TM		 2249 dentry = opendata->dentry;
2250 if (dentry->d_inode == NULL) {
2251 /* FIXME: Is this d_drop() ever needed? */
2252 d_drop(dentry);
2253 dentry = d_add_unique(dentry, igrab(state->inode));
2254 if (dentry == NULL) {
2255 dentry = opendata->dentry;
2256 } else if (dentry != ctx->dentry) {
2257 dput(ctx->dentry);
2258 ctx->dentry = dget(dentry);
2259 }
2260 nfs_set_verifier(dentry,
2261 nfs_save_change_attribute(opendata->dir->d_inode));
2262 }
2263
c21443c2
TM		 2264 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2265 if (ret != 0)
2266 goto out;
2267
3efb9722 2268 ctx->state = state;
c45ffdd2
TM		 2269 if (dentry->d_inode == state->inode) {
2270 nfs_inode_attach_open_context(ctx);
2271 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2272 nfs4_schedule_stateid_recovery(server, state);
2273 }
c21443c2
TM		 2274out:
2275 return ret;
2276}
2277
1da177e4 2278/*
24ac23ab 2279 * Returns a referenced nfs4_state
1da177e4 2280 */
82be417a 2281static int _nfs4_do_open(struct inode *dir,
4197a055 2282 struct nfs_open_context *ctx,
82be417a
AA		 2283 int flags,
2284 struct iattr *sattr,
5bc2afc2
TM		 2285 struct nfs4_label *label,
2286 int *opened)
1da177e4
LT		 2287{
2288 struct nfs4_state_owner *sp;
2289 struct nfs4_state *state = NULL;
2290 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2291 struct nfs4_opendata *opendata;
4197a055
TM		 2292 struct dentry *dentry = ctx->dentry;
2293 struct rpc_cred *cred = ctx->cred;
2294 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2295 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2296 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2297 struct nfs4_label *olabel = NULL;
aac00a8d 2298 int status;
1da177e4
LT		 2299
2300 /* Protect against reboot recovery conflicts */
1da177e4 2301 status = -ENOMEM;
d1e284d5
TM		 2302 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2303 if (sp == NULL) {
1da177e4
LT		 2304 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2305 goto out_err;
2306 }
58d9714a
TM		 2307 status = nfs4_recover_expired_lease(server);
2308 if (status != 0)
b4454fe1 2309 goto err_put_state_owner;
82a2c1b7
AV		 2310 if (dentry->d_inode != NULL)
2311 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2312 status = -ENOMEM;
49f9a0fa
TM		 2313 if (dentry->d_inode)
2314 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2315 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2316 label, claim, GFP_KERNEL);
e56e0b78 2317 if (opendata == NULL)
95d35cb4 2318 goto err_put_state_owner;
1da177e4 2319
14c43f76
DQ		 2320 if (label) {
2321 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2322 if (IS_ERR(olabel)) {
2323 status = PTR_ERR(olabel);
2324 goto err_opendata_put;
2325 }
2326 }
2327
e911b815
TM		 2328 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2329 if (!opendata->f_attr.mdsthreshold) {
2330 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2331 if (!opendata->f_attr.mdsthreshold)
2332 goto err_free_label;
2333 }
1549210f 2334 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2335 }
82a2c1b7
AV		 2336 if (dentry->d_inode != NULL)
2337 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2338
3efb9722 2339 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2340 if (status != 0)
14c43f76 2341 goto err_free_label;
3efb9722 2342 state = ctx->state;
6168f62c 2343
549b19cc
TM		 2344 if ((opendata->o_arg.open_flags & O_EXCL) &&
2345 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2346 nfs4_exclusive_attrset(opendata, sattr);
2347
2348 nfs_fattr_init(opendata->o_res.f_attr);
2349 status = nfs4_do_setattr(state->inode, cred,
2350 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2351 state, label, olabel);
2352 if (status == 0) {
0ab64e0e 2353 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2354 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2355 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2356 }
0ab64e0e 2357 }
5bc2afc2
TM		 2358 if (opendata->file_created)
2359 *opened |= FILE_CREATED;
82be417a 2360
e911b815 2361 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2362 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2363 opendata->f_attr.mdsthreshold = NULL;
2364 }
82be417a 2365
14c43f76
DQ		 2366 nfs4_label_free(olabel);
2367
c6d00e63 2368 nfs4_opendata_put(opendata);
1da177e4 2369 nfs4_put_state_owner(sp);
1da177e4 2370 return 0;
14c43f76
DQ		 2371err_free_label:
2372 nfs4_label_free(olabel);
c6d00e63
TM		 2373err_opendata_put:
2374 nfs4_opendata_put(opendata);
e56e0b78
TM		 2375err_put_state_owner:
2376 nfs4_put_state_owner(sp);
1da177e4 2377out_err:
1da177e4
LT		 2378 return status;
2379}
2380
2381
82be417a 2382static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2383 struct nfs_open_context *ctx,
82be417a
AA		 2384 int flags,
2385 struct iattr *sattr,
5bc2afc2
TM		 2386 struct nfs4_label *label,
2387 int *opened)
1da177e4 2388{
49f9a0fa 2389 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2390 struct nfs4_exception exception = { };
2391 struct nfs4_state *res;
2392 int status;
2393
2394 do {
5bc2afc2 2395 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2396 res = ctx->state;
42113a75 2397 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2398 if (status == 0)
2399 break;
2400 /* NOTE: BAD_SEQID means the server and client disagree about the
2401 * book-keeping w.r.t. state-changing operations
2402 * (OPEN/CLOSE/LOCK/LOCKU...)
2403 * It is actually a sign of a bug on the client or on the server.
2404 *
2405 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2406 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2407 * have unhashed the old state_owner for us, and that we can
2408 * therefore safely retry using a new one. We should still warn
2409 * the user though...
2410 */
2411 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2412 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2413 " returned a bad sequence-id error!\n",
2414 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2415 exception.retry = 1;
2416 continue;
2417 }
550f5747
TM		 2418 /*
2419 * BAD_STATEID on OPEN means that the server cancelled our
2420 * state before it received the OPEN_CONFIRM.
2421 * Recover by retrying the request as per the discussion
2422 * on Page 181 of RFC3530.
2423 */
2424 if (status == -NFS4ERR_BAD_STATEID) {
2425 exception.retry = 1;
2426 continue;
2427 }
aac00a8d
TM		 2428 if (status == -EAGAIN) {
2429 /* We must have found a delegation */
2430 exception.retry = 1;
2431 continue;
2432 }
49f9a0fa
TM		 2433 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2434 continue;
2435 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2436 status, &exception));
2437 } while (exception.retry);
2438 return res;
2439}
2440
659bfcd6
TM		 2441static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2442 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2443 struct nfs4_state *state, struct nfs4_label *ilabel,
2444 struct nfs4_label *olabel)
1da177e4 2445{
3e4f6290 2446 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2447 struct nfs_setattrargs arg = {
3e4f6290 2448 .fh = NFS_FH(inode),
1da177e4
LT		 2449 .iap = sattr,
2450 .server = server,
2451 .bitmask = server->attr_bitmask,
1775fd3e 2452 .label = ilabel,
1da177e4
LT		 2453 };
2454 struct nfs_setattrres res = {
2455 .fattr = fattr,
1775fd3e 2456 .label = olabel,
1da177e4
LT		 2457 .server = server,
2458 };
2459 struct rpc_message msg = {
659bfcd6
TM		 2460 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2461 .rpc_argp = &arg,
2462 .rpc_resp = &res,
2463 .rpc_cred = cred,
1da177e4 2464 };
26e976a8 2465 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2466 fmode_t fmode;
2467 bool truncate;
65e4308d 2468 int status;
1da177e4 2469
aa9c2669
DQ		 2470 arg.bitmask = nfs4_bitmask(server, ilabel);
2471 if (ilabel)
2472 arg.bitmask = nfs4_bitmask(server, olabel);
2473
0e574af1 2474 nfs_fattr_init(fattr);
1da177e4 2475
ee3ae84e
TM		 2476 /* Servers should only apply open mode checks for file size changes */
2477 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2478 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2479
2480 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2481 /* Use that stateid */
0418dae1 2482 } else if (truncate && state != NULL) {
2a369153
TM		 2483 struct nfs_lockowner lockowner = {
2484 .l_owner = current->files,
2485 .l_pid = current->tgid,
2486 };
0418dae1
TM		 2487 if (!nfs4_valid_open_stateid(state))
2488 return -EBADF;
2489 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2490 &lockowner) == -EIO)
2491 return -EBADF;
08e9eac4 2492 } else
f597c537 2493 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2494
7c513058 2495 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2496 if (status == 0 && state != NULL)
2497 renew_lease(server, timestamp);
65e4308d 2498 return status;
1da177e4
LT		 2499}
2500
659bfcd6
TM		 2501static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2502 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2503 struct nfs4_state *state, struct nfs4_label *ilabel,
2504 struct nfs4_label *olabel)
1da177e4 2505{
3e4f6290 2506 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2507 struct nfs4_exception exception = {
2508 .state = state,
3114ea7a 2509 .inode = inode,
a1d0b5ee 2510 };
1da177e4
LT		 2511 int err;
2512 do {
1775fd3e 2513 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2514 trace_nfs4_setattr(inode, err);
451146be
TM		 2515 switch (err) {
2516 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2517 if (!(sattr->ia_valid & ATTR_SIZE)) {
2518 pr_warn_once("NFSv4: server %s is incorrectly "
2519 "applying open mode checks to "
2520 "a SETATTR that is not "
2521 "changing file size.\n",
2522 server->nfs_client->cl_hostname);
2523 }
451146be
TM		 2524 if (state && !(state->state & FMODE_WRITE)) {
2525 err = -EBADF;
2526 if (sattr->ia_valid & ATTR_OPEN)
2527 err = -EACCES;
2528 goto out;
2529 }
2530 }
2531 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2532 } while (exception.retry);
451146be 2533out:
1da177e4
LT		 2534 return err;
2535}
2536
2537struct nfs4_closedata {
2538 struct inode *inode;
2539 struct nfs4_state *state;
2540 struct nfs_closeargs arg;
2541 struct nfs_closeres res;
516a6af6 2542 struct nfs_fattr fattr;
26e976a8 2543 unsigned long timestamp;
f7e8917a
FI		 2544 bool roc;
2545 u32 roc_barrier;
1da177e4
LT		 2546};
2547
963d8fe5 2548static void nfs4_free_closedata(void *data)
9512135d 2549{
963d8fe5
TM		 2550 struct nfs4_closedata *calldata = data;
2551 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2552 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2553
f7e8917a
FI		 2554 if (calldata->roc)
2555 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2556 nfs4_put_open_state(calldata->state);
2557 nfs_free_seqid(calldata->arg.seqid);
9512135d 2558 nfs4_put_state_owner(sp);
322b2b90 2559 nfs_sb_deactive(sb);
9512135d
TM		 2560 kfree(calldata);
2561}
2562
963d8fe5 2563static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2564{
963d8fe5 2565 struct nfs4_closedata *calldata = data;
1da177e4 2566 struct nfs4_state *state = calldata->state;
1da177e4 2567 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2568 nfs4_stateid *res_stateid = NULL;
1da177e4 2569
a3ca5651 2570 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2571 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2572 return;
42113a75 2573 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2574 /* hmm. we are done with the inode, and in the process of freeing
2575 * the state_owner. we keep this around to process errors
2576 */
1da177e4
LT		 2577 switch (task->tk_status) {
2578 case 0:
412f6c4c
TM		 2579 res_stateid = &calldata->res.stateid;
2580 if (calldata->arg.fmode == 0 && calldata->roc)
f7e8917a
FI		 2581 pnfs_roc_set_barrier(state->inode,
2582 calldata->roc_barrier);
26e976a8 2583 renew_lease(server, calldata->timestamp);
412f6c4c 2584 break;
69794ad7 2585 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2586 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2587 case -NFS4ERR_OLD_STATEID:
2588 case -NFS4ERR_BAD_STATEID:
1da177e4 2589 case -NFS4ERR_EXPIRED:
dc0b027d 2590 if (calldata->arg.fmode == 0)
9e33bed5 2591 break;
1da177e4 2592 default:
8478eaa1 2593 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2594 rpc_restart_call_prepare(task);
69794ad7
TM		 2595 goto out_release;
2596 }
1da177e4 2597 }
412f6c4c 2598 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
69794ad7 2599out_release:
72211dbe 2600 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2601 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2602 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2603}
2604
4ce70ada 2605static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2606{
4ce70ada 2607 struct nfs4_closedata *calldata = data;
9512135d 2608 struct nfs4_state *state = calldata->state;
7fdab069 2609 struct inode *inode = calldata->inode;
aee7af35 2610 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2611 int call_close = 0;
9512135d 2612
a3ca5651 2613 dprintk("%s: begin!\n", __func__);
963d8fe5 2614 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2615 goto out_wait;
003707c7 2616
88069f77 2617 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2618 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2619 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2620 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2621 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
003707c7 2622 /* Calculate the change in open mode */
cd9288ff 2623 calldata->arg.fmode = 0;
e7616923 2624 if (state->n_rdwr == 0) {
cd9288ff
TM		 2625 if (state->n_rdonly == 0)
2626 call_close |= is_rdonly;
2627 else if (is_rdonly)
2628 calldata->arg.fmode |= FMODE_READ;
2629 if (state->n_wronly == 0)
2630 call_close |= is_wronly;
2631 else if (is_wronly)
2632 calldata->arg.fmode |= FMODE_WRITE;
2633 } else if (is_rdwr)
2634 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2635
2636 if (calldata->arg.fmode == 0)
2637 call_close |= is_rdwr;
2638
5d422301
TM		 2639 if (!nfs4_valid_open_stateid(state))
2640 call_close = 0;
4cecb76f 2641 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2642
2643 if (!call_close) {
963d8fe5 2644 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2645 goto out_no_action;
9512135d 2646 }
88069f77 2647
f7e8917a 2648 if (calldata->arg.fmode == 0) {
88069f77 2649 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2650 if (calldata->roc &&
b9536ad5
AA		 2651 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2652 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2653 goto out_wait;
b9536ad5 2654 }
f7e8917a 2655 }
88069f77 2656
516a6af6 2657 nfs_fattr_init(calldata->res.fattr);
26e976a8 2658 calldata->timestamp = jiffies;
7fdab069 2659 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2660 &calldata->arg.seq_args,
2661 &calldata->res.seq_res,
2240a9e2
TM		 2662 task) != 0)
2663 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2664 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2665 return;
2666out_no_action:
2667 task->tk_action = NULL;
2668out_wait:
2669 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2670}
2671
963d8fe5 2672static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2673 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2674 .rpc_call_done = nfs4_close_done,
2675 .rpc_release = nfs4_free_closedata,
2676};
2677
fe08c546
PT		 2678static bool nfs4_state_has_opener(struct nfs4_state *state)
2679{
2680 /* first check existing openers */
2681 if (test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0 &&
2682 state->n_rdonly != 0)
2683 return true;
2684
2685 if (test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0 &&
2686 state->n_wronly != 0)
2687 return true;
2688
2689 if (test_bit(NFS_O_RDWR_STATE, &state->flags) != 0 &&
2690 state->n_rdwr != 0)
2691 return true;
2692
2693 return false;
2694}
2695
2696static bool nfs4_roc(struct inode *inode)
2697{
2698 struct nfs_inode *nfsi = NFS_I(inode);
2699 struct nfs_open_context *ctx;
2700 struct nfs4_state *state;
2701
2702 spin_lock(&inode->i_lock);
2703 list_for_each_entry(ctx, &nfsi->open_files, list) {
2704 state = ctx->state;
2705 if (state == NULL)
2706 continue;
2707 if (nfs4_state_has_opener(state)) {
2708 spin_unlock(&inode->i_lock);
2709 return false;
2710 }
2711 }
2712 spin_unlock(&inode->i_lock);
2713
2714 if (nfs4_check_delegation(inode, FMODE_READ))
2715 return false;
2716
2717 return pnfs_roc(inode);
2718}
2719
1da177e4
LT		 2720/*
2721 * It is possible for data to be read/written from a mem-mapped file
2722 * after the sys_close call (which hits the vfs layer as a flush).
2723 * This means that we can't safely call nfsv4 close on a file until
2724 * the inode is cleared. This in turn means that we are not good
2725 * NFSv4 citizens - we do not indicate to the server to update the file's
2726 * share state even when we are done with one of the three share
2727 * stateid's in the inode.
2728 *
2729 * NOTE: Caller must be holding the sp->so_owner semaphore!
2730 */
1f7977c1 2731int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2732{
4a35bd41 2733 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2734 struct nfs4_closedata *calldata;
b39e625b
TM		 2735 struct nfs4_state_owner *sp = state->owner;
2736 struct rpc_task *task;
5138fde0
TM		 2737 struct rpc_message msg = {
2738 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2739 .rpc_cred = state->owner->so_cred,
2740 };
c970aa85
TM		 2741 struct rpc_task_setup task_setup_data = {
2742 .rpc_client = server->client,
5138fde0 2743 .rpc_message = &msg,
c970aa85 2744 .callback_ops = &nfs4_close_ops,
101070ca 2745 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2746 .flags = RPC_TASK_ASYNC,
2747 };
9512135d 2748 int status = -ENOMEM;
1da177e4 2749
fa940720
WAA		 2750 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2751 &task_setup_data.rpc_client, &msg);
2752
8535b2be 2753 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2754 if (calldata == NULL)
9512135d 2755 goto out;
a9c92d6b 2756 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2757 calldata->inode = state->inode;
1da177e4 2758 calldata->state = state;
4a35bd41 2759 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2760 calldata->arg.stateid = &state->open_stateid;
1da177e4 2761 /* Serialization for the sequence id */
8535b2be 2762 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2763 if (calldata->arg.seqid == NULL)
2764 goto out_free_calldata;
dc0b027d 2765 calldata->arg.fmode = 0;
a65318bf 2766 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2767 calldata->res.fattr = &calldata->fattr;
c1d51931 2768 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2769 calldata->res.server = server;
fe08c546 2770 calldata->roc = nfs4_roc(state->inode);
643168c2 2771 nfs_sb_active(calldata->inode->i_sb);
9512135d 2772
1174dd1f
TM		 2773 msg.rpc_argp = &calldata->arg;
2774 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2775 task_setup_data.callback_data = calldata;
2776 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2777 if (IS_ERR(task))
2778 return PTR_ERR(task);
a49c3c77
TM		 2779 status = 0;
2780 if (wait)
2781 status = rpc_wait_for_completion_task(task);
b39e625b 2782 rpc_put_task(task);
a49c3c77 2783 return status;
9512135d
TM		 2784out_free_calldata:
2785 kfree(calldata);
2786out:
b39e625b
TM		 2787 nfs4_put_open_state(state);
2788 nfs4_put_state_owner(sp);
9512135d 2789 return status;
1da177e4
LT		 2790}
2791
2b484297 2792static struct inode *
5bc2afc2
TM		 2793nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2794 int open_flags, struct iattr *attr, int *opened)
1da177e4 2795{
1da177e4 2796 struct nfs4_state *state;
aa9c2669
DQ		 2797 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2798
2799 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2800
565277f6 2801 /* Protect against concurrent sillydeletes */
5bc2afc2 2802 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2803
2804 nfs4_label_release_security(label);
2805
f46e0bd3
TM		 2806 if (IS_ERR(state))
2807 return ERR_CAST(state);
275bb307 2808 return state->inode;
1da177e4
LT		 2809}
2810
1185a552 2811static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2812{
2813 if (ctx->state == NULL)
2814 return;
2815 if (is_sync)
643168c2 2816 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2817 else
643168c2 2818 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2819}
1da177e4 2820
b944dba3
TM		 2821#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2822#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2823#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2824
1da177e4
LT		 2825static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2826{
43652ad5
BH		 2827 struct nfs4_server_caps_arg args = {
2828 .fhandle = fhandle,
2829 };
1da177e4
LT		 2830 struct nfs4_server_caps_res res = {};
2831 struct rpc_message msg = {
2832 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2833 .rpc_argp = &args,
1da177e4
LT		 2834 .rpc_resp = &res,
2835 };
2836 int status;
2837
7c513058 2838 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2839 if (status == 0) {
b944dba3
TM		 2840 /* Sanity check the server answers */
2841 switch (server->nfs_client->cl_minorversion) {
2842 case 0:
2843 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2844 res.attr_bitmask[2] = 0;
2845 break;
2846 case 1:
2847 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2848 break;
2849 case 2:
2850 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2851 }
1da177e4 2852 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2853 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2854 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2855 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2856 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2857 NFS_CAP_CTIME|NFS_CAP_MTIME|
2858 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2859 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2860 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2861 server->caps |= NFS_CAP_ACLS;
2862 if (res.has_links != 0)
2863 server->caps |= NFS_CAP_HARDLINKS;
2864 if (res.has_symlinks != 0)
2865 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2866 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2867 server->caps |= NFS_CAP_FILEID;
2868 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2869 server->caps |= NFS_CAP_MODE;
2870 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2871 server->caps |= NFS_CAP_NLINK;
2872 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2873 server->caps |= NFS_CAP_OWNER;
2874 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2875 server->caps |= NFS_CAP_OWNER_GROUP;
2876 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2877 server->caps |= NFS_CAP_ATIME;
2878 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2879 server->caps |= NFS_CAP_CTIME;
2880 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2881 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2882#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2883 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2884 server->caps |= NFS_CAP_SECURITY_LABEL;
2885#endif
2886 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2887 sizeof(server->attr_bitmask));
b944dba3 2888 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2889
a65318bf
TM		 2890 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2891 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2892 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2893 server->cache_consistency_bitmask[2] = 0;
1da177e4 2894 server->acl_bitmask = res.acl_bitmask;
264e6351 2895 server->fh_expire_type = res.fh_expire_type;
1da177e4 2896 }
cccef3b9 2897
1da177e4
LT		 2898 return status;
2899}
2900
55a97593 2901int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2902{
2903 struct nfs4_exception exception = { };
2904 int err;
2905 do {
2906 err = nfs4_handle_exception(server,
2907 _nfs4_server_capabilities(server, fhandle),
2908 &exception);
2909 } while (exception.retry);
2910 return err;
2911}
2912
2913static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2914 struct nfs_fsinfo *info)
2915{
aa9c2669 2916 u32 bitmask[3];
1da177e4 2917 struct nfs4_lookup_root_arg args = {
aa9c2669 2918 .bitmask = bitmask,
1da177e4
LT		 2919 };
2920 struct nfs4_lookup_res res = {
2921 .server = server,
0e574af1 2922 .fattr = info->fattr,
1da177e4
LT		 2923 .fh = fhandle,
2924 };
2925 struct rpc_message msg = {
2926 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2927 .rpc_argp = &args,
2928 .rpc_resp = &res,
2929 };
008f55d0 2930
aa9c2669
DQ		 2931 bitmask[0] = nfs4_fattr_bitmap[0];
2932 bitmask[1] = nfs4_fattr_bitmap[1];
2933 /*
2934 * Process the label in the upcoming getfattr
2935 */
2936 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2937
0e574af1 2938 nfs_fattr_init(info->fattr);
7c513058 2939 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2940}
2941
2942static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2943 struct nfs_fsinfo *info)
2944{
2945 struct nfs4_exception exception = { };
2946 int err;
2947 do {
fb8a5ba8 2948 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2949 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2950 switch (err) {
2951 case 0:
2952 case -NFS4ERR_WRONGSEC:
05e9cfb4 2953 goto out;
fb8a5ba8
BS		 2954 default:
2955 err = nfs4_handle_exception(server, err, &exception);
2956 }
1da177e4 2957 } while (exception.retry);
05e9cfb4 2958out:
1da177e4
LT		 2959 return err;
2960}
2961
8f70e95f
BS		 2962static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2963 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2964{
c2190661
TM		 2965 struct rpc_auth_create_args auth_args = {
2966 .pseudoflavor = flavor,
2967 };
8f70e95f
BS		 2968 struct rpc_auth *auth;
2969 int ret;
2970
c2190661 2971 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 2972 if (IS_ERR(auth)) {
75bc8821 2973 ret = -EACCES;
8f70e95f
BS		 2974 goto out;
2975 }
2976 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2977out:
2978 return ret;
2979}
2980
9a744ba3
CL		 2981/*
2982 * Retry pseudoroot lookup with various security flavors. We do this when:
2983 *
2984 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2985 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2986 *
2987 * Returns zero on success, or a negative NFS4ERR value, or a
2988 * negative errno value.
2989 */
801a16dc 2990static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2991 struct nfs_fsinfo *info)
1da177e4 2992{
9a744ba3
CL		 2993 /* Per 3530bis 15.33.5 */
2994 static const rpc_authflavor_t flav_array[] = {
2995 RPC_AUTH_GSS_KRB5P,
2996 RPC_AUTH_GSS_KRB5I,
2997 RPC_AUTH_GSS_KRB5,
c4eafe11 2998 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2999 RPC_AUTH_NULL,
3000 };
3001 int status = -EPERM;
3002 size_t i;
6a1a1e34 3003
4d4b69dd
WAA		 3004 if (server->auth_info.flavor_len > 0) {
3005 /* try each flavor specified by user */
3006 for (i = 0; i < server->auth_info.flavor_len; i++) {
3007 status = nfs4_lookup_root_sec(server, fhandle, info,
3008 server->auth_info.flavors[i]);
3009 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3010 continue;
3011 break;
3012 }
3013 } else {
3014 /* no flavors specified by user, try default list */
3015 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3016 status = nfs4_lookup_root_sec(server, fhandle, info,
3017 flav_array[i]);
3018 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3019 continue;
3020 break;
3021 }
8f70e95f 3022 }
9a744ba3 3023
fb8a5ba8
BS		 3024 /*
3025 * -EACCESS could mean that the user doesn't have correct permissions
3026 * to access the mount. It could also mean that we tried to mount
3027 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3028 * existing mount programs don't handle -EACCES very well so it should
3029 * be mapped to -EPERM instead.
3030 */
3031 if (status == -EACCES)
3032 status = -EPERM;
801a16dc
BS		 3033 return status;
3034}
3035
2ed4b95b
CL		 3036static int nfs4_do_find_root_sec(struct nfs_server *server,
3037 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3038{
3039 int mv = server->nfs_client->cl_minorversion;
3040 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3041}
3042
3043/**
3044 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3045 * @server: initialized nfs_server handle
3046 * @fhandle: we fill in the pseudo-fs root file handle
3047 * @info: we fill in an FSINFO struct
5e6b1990 3048 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3049 *
3050 * Returns zero on success, or a negative errno.
801a16dc 3051 */
3028eb2b 3052int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3053 struct nfs_fsinfo *info,
3054 bool auth_probe)
801a16dc 3055{
2ed4b95b
CL		 3056 int status;
3057
5e6b1990
TM		 3058 switch (auth_probe) {
3059 case false:
3060 status = nfs4_lookup_root(server, fhandle, info);
3061 if (status != -NFS4ERR_WRONGSEC)
3062 break;
5e6b1990 3063 default:
2ed4b95b 3064 status = nfs4_do_find_root_sec(server, fhandle, info);
5e6b1990 3065 }
2ed4b95b 3066
1da177e4
LT		 3067 if (status == 0)
3068 status = nfs4_server_capabilities(server, fhandle);
3069 if (status == 0)
3070 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3071
c12e87f4 3072 return nfs4_map_errors(status);
1da177e4
LT		 3073}
3074
bae36241
BS		 3075static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3076 struct nfs_fsinfo *info)
3077{
3078 int error;
3079 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3080 struct nfs4_label *label = NULL;
bae36241
BS		 3081
3082 error = nfs4_server_capabilities(server, mntfh);
3083 if (error < 0) {
3084 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3085 return error;
3086 }
3087
14c43f76
DQ		 3088 label = nfs4_label_alloc(server, GFP_KERNEL);
3089 if (IS_ERR(label))
3090 return PTR_ERR(label);
3091
1775fd3e 3092 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3093 if (error < 0) {
3094 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3095 goto err_free_label;
bae36241
BS		 3096 }
3097
3098 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3099 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3100 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3101
14c43f76
DQ		 3102err_free_label:
3103 nfs4_label_free(label);
3104
bae36241
BS		 3105 return error;
3106}
3107
6b97fd3d
MN		 3108/*
3109 * Get locations and (maybe) other attributes of a referral.
3110 * Note that we'll actually follow the referral later when
3111 * we detect fsid mismatch in inode revalidation
3112 */
f05d147f
BS		 3113static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3114 const struct qstr *name, struct nfs_fattr *fattr,
3115 struct nfs_fh *fhandle)
6b97fd3d
MN		 3116{
3117 int status = -ENOMEM;
3118 struct page *page = NULL;
3119 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3120
3121 page = alloc_page(GFP_KERNEL);
3122 if (page == NULL)
3123 goto out;
3124 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3125 if (locations == NULL)
3126 goto out;
3127
f05d147f 3128 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3129 if (status != 0)
3130 goto out;
519ae255
CL		 3131
3132 /*
3133 * If the fsid didn't change, this is a migration event, not a
3134 * referral. Cause us to drop into the exception handler, which
3135 * will kick off migration recovery.
3136 */
6b97fd3d 3137 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3138 dprintk("%s: server did not return a different fsid for"
3139 " a referral at %s\n", __func__, name->name);
519ae255 3140 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3141 goto out;
3142 }
533eb461
AA		 3143 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3144 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3145
533eb461 3146 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3147 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3148 memset(fhandle, 0, sizeof(struct nfs_fh));
3149out:
3150 if (page)
3151 __free_page(page);
5d7ca35a 3152 kfree(locations);
6b97fd3d
MN		 3153 return status;
3154}
3155
1775fd3e
DQ		 3156static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3157 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3158{
3159 struct nfs4_getattr_arg args = {
3160 .fh = fhandle,
3161 .bitmask = server->attr_bitmask,
3162 };
3163 struct nfs4_getattr_res res = {
3164 .fattr = fattr,
1775fd3e 3165 .label = label,
1da177e4
LT		 3166 .server = server,
3167 };
3168 struct rpc_message msg = {
3169 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3170 .rpc_argp = &args,
3171 .rpc_resp = &res,
3172 };
aa9c2669
DQ		 3173
3174 args.bitmask = nfs4_bitmask(server, label);
3175
0e574af1 3176 nfs_fattr_init(fattr);
7c513058 3177 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3178}
3179
1775fd3e
DQ		 3180static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3181 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3182{
3183 struct nfs4_exception exception = { };
3184 int err;
3185 do {
b5f875a9
TM		 3186 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3187 trace_nfs4_getattr(server, fhandle, fattr, err);
3188 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3189 &exception);
3190 } while (exception.retry);
3191 return err;
3192}
3193
3194/*
3195 * The file is not closed if it is opened due to the a request to change
3196 * the size of the file. The open call will not be needed once the
3197 * VFS layer lookup-intents are implemented.
3198 *
3199 * Close is called when the inode is destroyed.
3200 * If we haven't opened the file for O_WRONLY, we
3201 * need to in the size_change case to obtain a stateid.
3202 *
3203 * Got race?
3204 * Because OPEN is always done by name in nfsv4, it is
3205 * possible that we opened a different file by the same
3206 * name. We can recognize this race condition, but we
3207 * can't do anything about it besides returning an error.
3208 *
3209 * This will be fixed with VFS changes (lookup-intent).
3210 */
3211static int
3212nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3213 struct iattr *sattr)
3214{
08e9eac4 3215 struct inode *inode = dentry->d_inode;
659bfcd6 3216 struct rpc_cred *cred = NULL;
d530838b 3217 struct nfs4_state *state = NULL;
14c43f76 3218 struct nfs4_label *label = NULL;
1da177e4
LT		 3219 int status;
3220
88ac815c
PT		 3221 if (pnfs_ld_layoutret_on_setattr(inode) &&
3222 sattr->ia_valid & ATTR_SIZE &&
3223 sattr->ia_size < i_size_read(inode))
24028672 3224 pnfs_commit_and_return_layout(inode);
8a1636c4 3225
0e574af1 3226 nfs_fattr_init(fattr);
1da177e4 3227
2669940d
AA		 3228 /* Deal with open(O_TRUNC) */
3229 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3230 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3231
3232 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3233 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3234 return 0;
3235
d530838b 3236 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3237 if (sattr->ia_valid & ATTR_FILE) {
3238 struct nfs_open_context *ctx;
3239
3240 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3241 if (ctx) {
3242 cred = ctx->cred;
3243 state = ctx->state;
3244 }
659bfcd6 3245 }
08e9eac4 3246
14c43f76
DQ		 3247 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3248 if (IS_ERR(label))
3249 return PTR_ERR(label);
3250
3251 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3252 if (status == 0) {
65e4308d 3253 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 3254 nfs_setsecurity(inode, fattr, label);
3255 }
14c43f76 3256 nfs4_label_free(label);
1da177e4
LT		 3257 return status;
3258}
3259
0c2e53f1
TM		 3260static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3261 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3262 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3263{
0c2e53f1 3264 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3265 int status;
3266 struct nfs4_lookup_arg args = {
3267 .bitmask = server->attr_bitmask,
0c2e53f1 3268 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3269 .name = name,
3270 };
3271 struct nfs4_lookup_res res = {
3272 .server = server,
3273 .fattr = fattr,
aa9c2669 3274 .label = label,
2b3de441
DH		 3275 .fh = fhandle,
3276 };
3277 struct rpc_message msg = {
3278 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3279 .rpc_argp = &args,
3280 .rpc_resp = &res,
3281 };
3282
aa9c2669
DQ		 3283 args.bitmask = nfs4_bitmask(server, label);
3284
2b3de441
DH		 3285 nfs_fattr_init(fattr);
3286
1da177e4 3287 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3288 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3289 dprintk("NFS reply lookup: %d\n", status);
3290 return status;
3291}
3292
72de53ec 3293static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3294{
7ebb9315 3295 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3296 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3297 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3298 fattr->nlink = 2;
3299}
3300
72de53ec
BS		 3301static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3302 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3303 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3304{
3305 struct nfs4_exception exception = { };
72de53ec 3306 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3307 int err;
3308 do {
1775fd3e 3309 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3310 trace_nfs4_lookup(dir, name, err);
72de53ec 3311 switch (err) {
08ef7bd3 3312 case -NFS4ERR_BADNAME:
72de53ec
BS		 3313 err = -ENOENT;
3314 goto out;
0c2e53f1 3315 case -NFS4ERR_MOVED:
f05d147f 3316 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3317 goto out;
0c2e53f1 3318 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3319 err = -EPERM;
3320 if (client != *clnt)
3321 goto out;
66b06860 3322 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3323 if (IS_ERR(client))
3324 return PTR_ERR(client);
3325
3326 exception.retry = 1;
3327 break;
3328 default:
3329 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3330 }
1da177e4 3331 } while (exception.retry);
72de53ec
BS		 3332
3333out:
3334 if (err == 0)
3335 *clnt = client;
3336 else if (client != *clnt)
3337 rpc_shutdown_client(client);
3338
1da177e4
LT		 3339 return err;
3340}
3341
80a16b21 3342static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3343 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3344 struct nfs4_label *label)
72de53ec
BS		 3345{
3346 int status;
3347 struct rpc_clnt *client = NFS_CLIENT(dir);
3348
1775fd3e 3349 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3350 if (client != NFS_CLIENT(dir)) {
3351 rpc_shutdown_client(client);
3352 nfs_fixup_secinfo_attributes(fattr);
3353 }
3354 return status;
3355}
3356
f05d147f
BS		 3357struct rpc_clnt *
3358nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3359 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3360{
b72888cb 3361 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3362 int status;
f05d147f 3363
1775fd3e 3364 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3365 if (status < 0)
f05d147f 3366 return ERR_PTR(status);
b72888cb 3367 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3368}
3369
1da177e4
LT		 3370static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3371{
76b32999 3372 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3373 struct nfs4_accessargs args = {
3374 .fh = NFS_FH(inode),
a4980e78 3375 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3376 };
3377 struct nfs4_accessres res = {
3378 .server = server,
1da177e4 3379 };
1da177e4
LT		 3380 struct rpc_message msg = {
3381 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3382 .rpc_argp = &args,
3383 .rpc_resp = &res,
3384 .rpc_cred = entry->cred,
3385 };
3386 int mode = entry->mask;
aa9c2669 3387 int status = 0;
1da177e4
LT		 3388
3389 /*
3390 * Determine which access bits we want to ask for...
3391 */
3392 if (mode & MAY_READ)
3393 args.access |= NFS4_ACCESS_READ;
3394 if (S_ISDIR(inode->i_mode)) {
3395 if (mode & MAY_WRITE)
3396 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3397 if (mode & MAY_EXEC)
3398 args.access |= NFS4_ACCESS_LOOKUP;
3399 } else {
3400 if (mode & MAY_WRITE)
3401 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3402 if (mode & MAY_EXEC)
3403 args.access |= NFS4_ACCESS_EXECUTE;
3404 }
c407d41a
TM		 3405
3406 res.fattr = nfs_alloc_fattr();
3407 if (res.fattr == NULL)
3408 return -ENOMEM;
3409
7c513058 3410 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3411 if (!status) {
6168f62c 3412 nfs_access_set_mask(entry, res.access);
c407d41a 3413 nfs_refresh_inode(inode, res.fattr);
1da177e4 3414 }
c407d41a 3415 nfs_free_fattr(res.fattr);
1da177e4
LT		 3416 return status;
3417}
3418
3419static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3420{
3421 struct nfs4_exception exception = { };
3422 int err;
3423 do {
c1578b76
TM		 3424 err = _nfs4_proc_access(inode, entry);
3425 trace_nfs4_access(inode, err);
3426 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3427 &exception);
3428 } while (exception.retry);
3429 return err;
3430}
3431
3432/*
3433 * TODO: For the time being, we don't try to get any attributes
3434 * along with any of the zero-copy operations READ, READDIR,
3435 * READLINK, WRITE.
3436 *
3437 * In the case of the first three, we want to put the GETATTR
3438 * after the read-type operation -- this is because it is hard
3439 * to predict the length of a GETATTR response in v4, and thus
3440 * align the READ data correctly. This means that the GETATTR
3441 * may end up partially falling into the page cache, and we should
3442 * shift it into the 'tail' of the xdr_buf before processing.
3443 * To do this efficiently, we need to know the total length
3444 * of data received, which doesn't seem to be available outside
3445 * of the RPC layer.
3446 *
3447 * In the case of WRITE, we also want to put the GETATTR after
3448 * the operation -- in this case because we want to make sure
140150db 3449 * we get the post-operation mtime and size.
1da177e4
LT		 3450 *
3451 * Both of these changes to the XDR layer would in fact be quite
3452 * minor, but I decided to leave them for a subsequent patch.
3453 */
3454static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3455 unsigned int pgbase, unsigned int pglen)
3456{
3457 struct nfs4_readlink args = {
3458 .fh = NFS_FH(inode),
3459 .pgbase = pgbase,
3460 .pglen = pglen,
3461 .pages = &page,
3462 };
f50c7000 3463 struct nfs4_readlink_res res;
1da177e4
LT		 3464 struct rpc_message msg = {
3465 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3466 .rpc_argp = &args,
f50c7000 3467 .rpc_resp = &res,
1da177e4
LT		 3468 };
3469
7c513058 3470 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3471}
3472
3473static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3474 unsigned int pgbase, unsigned int pglen)
3475{
3476 struct nfs4_exception exception = { };
3477 int err;
3478 do {
c1578b76
TM		 3479 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3480 trace_nfs4_readlink(inode, err);
3481 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3482 &exception);
3483 } while (exception.retry);
3484 return err;
3485}
3486
1da177e4 3487/*
8867fe58 3488 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3489 */
1da177e4
LT		 3490static int
3491nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3492 int flags)
1da177e4 3493{
aa9c2669 3494 struct nfs4_label l, *ilabel = NULL;
8867fe58 3495 struct nfs_open_context *ctx;
1da177e4 3496 struct nfs4_state *state;
5bc2afc2 3497 int opened = 0;
1da177e4
LT		 3498 int status = 0;
3499
8867fe58
MS		 3500 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3501 if (IS_ERR(ctx))
3502 return PTR_ERR(ctx);
3503
aa9c2669
DQ		 3504 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3505
a8a5da99 3506 sattr->ia_mode &= ~current_umask();
5bc2afc2 3507 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3508 if (IS_ERR(state)) {
3509 status = PTR_ERR(state);
c0204fd2 3510 goto out;
1da177e4 3511 }
1da177e4 3512out:
aa9c2669 3513 nfs4_label_release_security(ilabel);
8867fe58 3514 put_nfs_open_context(ctx);
1da177e4
LT		 3515 return status;
3516}
3517
3518static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3519{
16e42959 3520 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3521 struct nfs_removeargs args = {
1da177e4 3522 .fh = NFS_FH(dir),
26fe5750 3523 .name = *name,
16e42959 3524 };
4fdc17b2 3525 struct nfs_removeres res = {
16e42959 3526 .server = server,
1da177e4 3527 };
1da177e4 3528 struct rpc_message msg = {
4fdc17b2
TM		 3529 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3530 .rpc_argp = &args,
3531 .rpc_resp = &res,
1da177e4 3532 };
778d2817 3533 int status;
1da177e4 3534
7c513058 3535 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3536 if (status == 0)
16e42959 3537 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3538 return status;
3539}
3540
3541static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3542{
3543 struct nfs4_exception exception = { };
3544 int err;
3545 do {
078ea3df
TM		 3546 err = _nfs4_proc_remove(dir, name);
3547 trace_nfs4_remove(dir, name, err);
3548 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3549 &exception);
3550 } while (exception.retry);
3551 return err;
3552}
3553
e4eff1a6 3554static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3555{
e4eff1a6
TM		 3556 struct nfs_server *server = NFS_SERVER(dir);
3557 struct nfs_removeargs *args = msg->rpc_argp;
3558 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3559
e4eff1a6 3560 res->server = server;
1da177e4 3561 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3562 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3563
3564 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3565}
3566
34e137cc
BS		 3567static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3568{
d9afbd1b
TM		 3569 nfs4_setup_sequence(NFS_SERVER(data->dir),
3570 &data->args.seq_args,
3571 &data->res.seq_res,
3572 task);
1da177e4
LT		 3573}
3574
e4eff1a6 3575static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3576{
078ea3df
TM		 3577 struct nfs_unlinkdata *data = task->tk_calldata;
3578 struct nfs_removeres *res = &data->res;
e4eff1a6 3579
14516c3a
TM		 3580 if (!nfs4_sequence_done(task, &res->seq_res))
3581 return 0;
8478eaa1
N		 3582 if (nfs4_async_handle_error(task, res->server, NULL,
3583 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3584 return 0;
3585 update_changeattr(dir, &res->cinfo);
e4eff1a6 3586 return 1;
1da177e4
LT		 3587}
3588
d3d4152a
JL		 3589static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3590{
3591 struct nfs_server *server = NFS_SERVER(dir);
3592 struct nfs_renameargs *arg = msg->rpc_argp;
3593 struct nfs_renameres *res = msg->rpc_resp;
3594
3595 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3596 res->server = server;
a9c92d6b 3597 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3598}
3599
c6bfa1a1
BS		 3600static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3601{
d9afbd1b
TM		 3602 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3603 &data->args.seq_args,
3604 &data->res.seq_res,
3605 task);
d3d4152a
JL		 3606}
3607
3608static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3609 struct inode *new_dir)
3610{
fbc6f7c2
TM		 3611 struct nfs_renamedata *data = task->tk_calldata;
3612 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3613
3614 if (!nfs4_sequence_done(task, &res->seq_res))
3615 return 0;
8478eaa1 3616 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3617 return 0;
3618
3619 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3620 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3621 return 1;
3622}
3623
1da177e4
LT		 3624static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3625{
91ba2eee 3626 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3627 struct nfs4_link_arg arg = {
3628 .fh = NFS_FH(inode),
3629 .dir_fh = NFS_FH(dir),
3630 .name = name,
91ba2eee
TM		 3631 .bitmask = server->attr_bitmask,
3632 };
91ba2eee
TM		 3633 struct nfs4_link_res res = {
3634 .server = server,
1775fd3e 3635 .label = NULL,
1da177e4 3636 };
1da177e4
LT		 3637 struct rpc_message msg = {
3638 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3639 .rpc_argp = &arg,
91ba2eee 3640 .rpc_resp = &res,
1da177e4 3641 };
136f2627
TM		 3642 int status = -ENOMEM;
3643
3644 res.fattr = nfs_alloc_fattr();
778d2817 3645 if (res.fattr == NULL)
136f2627 3646 goto out;
1da177e4 3647
14c43f76
DQ		 3648 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3649 if (IS_ERR(res.label)) {
3650 status = PTR_ERR(res.label);
3651 goto out;
3652 }
aa9c2669 3653 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3654
7c513058 3655 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3656 if (!status) {
3657 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3658 status = nfs_post_op_update_inode(inode, res.fattr);
3659 if (!status)
3660 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3661 }
14c43f76
DQ		 3662
3663
3664 nfs4_label_free(res.label);
3665
136f2627 3666out:
136f2627 3667 nfs_free_fattr(res.fattr);
1da177e4
LT		 3668 return status;
3669}
3670
3671static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3672{
3673 struct nfs4_exception exception = { };
3674 int err;
3675 do {
3676 err = nfs4_handle_exception(NFS_SERVER(inode),
3677 _nfs4_proc_link(inode, dir, name),
3678 &exception);
3679 } while (exception.retry);
3680 return err;
3681}
3682
57dc9a57
TM		 3683struct nfs4_createdata {
3684 struct rpc_message msg;
3685 struct nfs4_create_arg arg;
3686 struct nfs4_create_res res;
3687 struct nfs_fh fh;
3688 struct nfs_fattr fattr;
1775fd3e 3689 struct nfs4_label *label;
57dc9a57
TM		 3690};
3691
3692static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3693 struct qstr *name, struct iattr *sattr, u32 ftype)
3694{
3695 struct nfs4_createdata *data;
3696
3697 data = kzalloc(sizeof(*data), GFP_KERNEL);
3698 if (data != NULL) {
3699 struct nfs_server *server = NFS_SERVER(dir);
3700
14c43f76
DQ		 3701 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3702 if (IS_ERR(data->label))
3703 goto out_free;
3704
57dc9a57
TM		 3705 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3706 data->msg.rpc_argp = &data->arg;
3707 data->msg.rpc_resp = &data->res;
3708 data->arg.dir_fh = NFS_FH(dir);
3709 data->arg.server = server;
3710 data->arg.name = name;
3711 data->arg.attrs = sattr;
3712 data->arg.ftype = ftype;
aa9c2669 3713 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3714 data->res.server = server;
3715 data->res.fh = &data->fh;
3716 data->res.fattr = &data->fattr;
1775fd3e 3717 data->res.label = data->label;
57dc9a57 3718 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3719 }
3720 return data;
14c43f76
DQ		 3721out_free:
3722 kfree(data);
3723 return NULL;
57dc9a57
TM		 3724}
3725
3726static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3727{
7c513058 3728 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3729 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3730 if (status == 0) {
3731 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3732 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3733 }
3734 return status;
3735}
3736
3737static void nfs4_free_createdata(struct nfs4_createdata *data)
3738{
14c43f76 3739 nfs4_label_free(data->label);
57dc9a57
TM		 3740 kfree(data);
3741}
3742
4f390c15 3743static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3744 struct page *page, unsigned int len, struct iattr *sattr,
3745 struct nfs4_label *label)
1da177e4 3746{
57dc9a57
TM		 3747 struct nfs4_createdata *data;
3748 int status = -ENAMETOOLONG;
1da177e4 3749
94a6d753 3750 if (len > NFS4_MAXPATHLEN)
57dc9a57 3751 goto out;
4f390c15 3752
57dc9a57
TM		 3753 status = -ENOMEM;
3754 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3755 if (data == NULL)
3756 goto out;
3757
3758 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3759 data->arg.u.symlink.pages = &page;
3760 data->arg.u.symlink.len = len;
1775fd3e 3761 data->arg.label = label;
1da177e4 3762
57dc9a57
TM		 3763 status = nfs4_do_create(dir, dentry, data);
3764
3765 nfs4_free_createdata(data);
3766out:
1da177e4
LT		 3767 return status;
3768}
3769
4f390c15 3770static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3771 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3772{
3773 struct nfs4_exception exception = { };
aa9c2669 3774 struct nfs4_label l, *label = NULL;
1da177e4 3775 int err;
aa9c2669
DQ		 3776
3777 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3778
1da177e4 3779 do {
078ea3df
TM		 3780 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3781 trace_nfs4_symlink(dir, &dentry->d_name, err);
3782 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3783 &exception);
3784 } while (exception.retry);
aa9c2669
DQ		 3785
3786 nfs4_label_release_security(label);
1da177e4
LT		 3787 return err;
3788}
3789
3790static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3791 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3792{
57dc9a57
TM		 3793 struct nfs4_createdata *data;
3794 int status = -ENOMEM;
1da177e4 3795
57dc9a57
TM		 3796 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3797 if (data == NULL)
3798 goto out;
3799
1775fd3e 3800 data->arg.label = label;
57dc9a57
TM		 3801 status = nfs4_do_create(dir, dentry, data);
3802
3803 nfs4_free_createdata(data);
3804out:
1da177e4
LT		 3805 return status;
3806}
3807
3808static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3809 struct iattr *sattr)
3810{
3811 struct nfs4_exception exception = { };
aa9c2669 3812 struct nfs4_label l, *label = NULL;
1da177e4 3813 int err;
a8a5da99 3814
aa9c2669
DQ		 3815 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3816
a8a5da99 3817 sattr->ia_mode &= ~current_umask();
1da177e4 3818 do {
078ea3df
TM		 3819 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3820 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3821 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3822 &exception);
3823 } while (exception.retry);
aa9c2669
DQ		 3824 nfs4_label_release_security(label);
3825
1da177e4
LT		 3826 return err;
3827}
3828
3829static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3830 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3831{
3832 struct inode *dir = dentry->d_inode;
3833 struct nfs4_readdir_arg args = {
3834 .fh = NFS_FH(dir),
56e4ebf8 3835 .pages = pages,
1da177e4
LT		 3836 .pgbase = 0,
3837 .count = count,
96d25e53 3838 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3839 .plus = plus,
1da177e4
LT		 3840 };
3841 struct nfs4_readdir_res res;
3842 struct rpc_message msg = {
3843 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3844 .rpc_argp = &args,
3845 .rpc_resp = &res,
3846 .rpc_cred = cred,
3847 };
3848 int status;
3849
6de1472f
AV		 3850 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3851 dentry,
eadf4598 3852 (unsigned long long)cookie);
c3f52af3 3853 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3854 res.pgbase = args.pgbase;
7c513058 3855 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3856 if (status >= 0) {
c3f52af3 3857 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3858 status += args.pgbase;
3859 }
c4812998
TM		 3860
3861 nfs_invalidate_atime(dir);
3862
3110ff80 3863 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3864 return status;
3865}
3866
3867static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3868 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3869{
3870 struct nfs4_exception exception = { };
3871 int err;
3872 do {
c1578b76
TM		 3873 err = _nfs4_proc_readdir(dentry, cred, cookie,
3874 pages, count, plus);
3875 trace_nfs4_readdir(dentry->d_inode, err);
3876 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3877 &exception);
3878 } while (exception.retry);
3879 return err;
3880}
3881
3882static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3883 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3884{
57dc9a57
TM		 3885 struct nfs4_createdata *data;
3886 int mode = sattr->ia_mode;
3887 int status = -ENOMEM;
1da177e4 3888
57dc9a57
TM		 3889 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3890 if (data == NULL)
3891 goto out;
3892
1da177e4 3893 if (S_ISFIFO(mode))
57dc9a57 3894 data->arg.ftype = NF4FIFO;
1da177e4 3895 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3896 data->arg.ftype = NF4BLK;
3897 data->arg.u.device.specdata1 = MAJOR(rdev);
3898 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3899 }
3900 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3901 data->arg.ftype = NF4CHR;
3902 data->arg.u.device.specdata1 = MAJOR(rdev);
3903 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3904 } else if (!S_ISSOCK(mode)) {
3905 status = -EINVAL;
3906 goto out_free;
1da177e4 3907 }
1775fd3e 3908
aa9c2669 3909 data->arg.label = label;
57dc9a57 3910 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3911out_free:
57dc9a57
TM		 3912 nfs4_free_createdata(data);
3913out:
1da177e4
LT		 3914 return status;
3915}
3916
3917static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3918 struct iattr *sattr, dev_t rdev)
3919{
3920 struct nfs4_exception exception = { };
aa9c2669 3921 struct nfs4_label l, *label = NULL;
1da177e4 3922 int err;
a8a5da99 3923
aa9c2669
DQ		 3924 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3925
a8a5da99 3926 sattr->ia_mode &= ~current_umask();
1da177e4 3927 do {
078ea3df
TM		 3928 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3929 trace_nfs4_mknod(dir, &dentry->d_name, err);
3930 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3931 &exception);
3932 } while (exception.retry);
aa9c2669
DQ		 3933
3934 nfs4_label_release_security(label);
3935
1da177e4
LT		 3936 return err;
3937}
3938
3939static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3940 struct nfs_fsstat *fsstat)
3941{
3942 struct nfs4_statfs_arg args = {
3943 .fh = fhandle,
3944 .bitmask = server->attr_bitmask,
3945 };
24ad148a
BH		 3946 struct nfs4_statfs_res res = {
3947 .fsstat = fsstat,
3948 };
1da177e4
LT		 3949 struct rpc_message msg = {
3950 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3951 .rpc_argp = &args,
24ad148a 3952 .rpc_resp = &res,
1da177e4
LT		 3953 };
3954
0e574af1 3955 nfs_fattr_init(fsstat->fattr);
7c513058 3956 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3957}
3958
3959static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3960{
3961 struct nfs4_exception exception = { };
3962 int err;
3963 do {
3964 err = nfs4_handle_exception(server,
3965 _nfs4_proc_statfs(server, fhandle, fsstat),
3966 &exception);
3967 } while (exception.retry);
3968 return err;
3969}
3970
3971static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3972 struct nfs_fsinfo *fsinfo)
3973{
3974 struct nfs4_fsinfo_arg args = {
3975 .fh = fhandle,
3976 .bitmask = server->attr_bitmask,
3977 };
3dda5e43
BH		 3978 struct nfs4_fsinfo_res res = {
3979 .fsinfo = fsinfo,
3980 };
1da177e4
LT		 3981 struct rpc_message msg = {
3982 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3983 .rpc_argp = &args,
3dda5e43 3984 .rpc_resp = &res,
1da177e4
LT		 3985 };
3986
7c513058 3987 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3988}
3989
3990static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3991{
3992 struct nfs4_exception exception = { };
83ca7f5a 3993 unsigned long now = jiffies;
1da177e4
LT		 3994 int err;
3995
3996 do {
83ca7f5a 3997 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 3998 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 3999 if (err == 0) {
4000 struct nfs_client *clp = server->nfs_client;
4001
4002 spin_lock(&clp->cl_lock);
4003 clp->cl_lease_time = fsinfo->lease_time * HZ;
4004 clp->cl_last_renewal = now;
4005 spin_unlock(&clp->cl_lock);
4006 break;
4007 }
4008 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4009 } while (exception.retry);
4010 return err;
4011}
4012
4013static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4014{
e38eb650
BS		 4015 int error;
4016
0e574af1 4017 nfs_fattr_init(fsinfo->fattr);
e38eb650 4018 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4019 if (error == 0) {
4020 /* block layout checks this! */
4021 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4022 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4023 }
e38eb650
BS		 4024
4025 return error;
1da177e4
LT		 4026}
4027
4028static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4029 struct nfs_pathconf *pathconf)
4030{
4031 struct nfs4_pathconf_arg args = {
4032 .fh = fhandle,
4033 .bitmask = server->attr_bitmask,
4034 };
d45b2989
BH		 4035 struct nfs4_pathconf_res res = {
4036 .pathconf = pathconf,
4037 };
1da177e4
LT		 4038 struct rpc_message msg = {
4039 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4040 .rpc_argp = &args,
d45b2989 4041 .rpc_resp = &res,
1da177e4
LT		 4042 };
4043
4044 /* None of the pathconf attributes are mandatory to implement */
4045 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4046 memset(pathconf, 0, sizeof(*pathconf));
4047 return 0;
4048 }
4049
0e574af1 4050 nfs_fattr_init(pathconf->fattr);
7c513058 4051 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4052}
4053
4054static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4055 struct nfs_pathconf *pathconf)
4056{
4057 struct nfs4_exception exception = { };
4058 int err;
4059
4060 do {
4061 err = nfs4_handle_exception(server,
4062 _nfs4_proc_pathconf(server, fhandle, pathconf),
4063 &exception);
4064 } while (exception.retry);
4065 return err;
4066}
4067
5521abfd 4068int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4069 const struct nfs_open_context *ctx,
4070 const struct nfs_lock_context *l_ctx,
4071 fmode_t fmode)
4072{
4073 const struct nfs_lockowner *lockowner = NULL;
4074
4075 if (l_ctx != NULL)
4076 lockowner = &l_ctx->lockowner;
5521abfd 4077 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4078}
4079EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4080
5521abfd
TM		 4081static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4082 const struct nfs_open_context *ctx,
4083 const struct nfs_lock_context *l_ctx,
4084 fmode_t fmode)
4085{
4086 nfs4_stateid current_stateid;
4087
e1253be0
TM		 4088 /* If the current stateid represents a lost lock, then exit */
4089 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4090 return true;
5521abfd
TM		 4091 return nfs4_stateid_match(stateid, &current_stateid);
4092}
4093
4094static bool nfs4_error_stateid_expired(int err)
4095{
4096 switch (err) {
4097 case -NFS4ERR_DELEG_REVOKED:
4098 case -NFS4ERR_ADMIN_REVOKED:
4099 case -NFS4ERR_BAD_STATEID:
4100 case -NFS4ERR_STALE_STATEID:
4101 case -NFS4ERR_OLD_STATEID:
4102 case -NFS4ERR_OPENMODE:
4103 case -NFS4ERR_EXPIRED:
4104 return true;
4105 }
4106 return false;
4107}
4108
d45f60c6 4109void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4110{
d45f60c6 4111 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4112}
4113
d45f60c6 4114static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4115{
d45f60c6 4116 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4117
d45f60c6
WAA		 4118 trace_nfs4_read(hdr, task->tk_status);
4119 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4120 hdr->args.context->state,
4121 NULL) == -EAGAIN) {
d00c5d43 4122 rpc_restart_call_prepare(task);
ec06c096 4123 return -EAGAIN;
1da177e4 4124 }
8850df99 4125
d45f60c6 4126 __nfs4_read_done_cb(hdr);
1da177e4 4127 if (task->tk_status > 0)
d45f60c6 4128 renew_lease(server, hdr->timestamp);
ec06c096 4129 return 0;
1da177e4
LT		 4130}
4131
5521abfd 4132static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4133 struct nfs_pgio_args *args)
5521abfd
TM		 4134{
4135
4136 if (!nfs4_error_stateid_expired(task->tk_status) ||
4137 nfs4_stateid_is_current(&args->stateid,
4138 args->context,
4139 args->lock_context,
4140 FMODE_READ))
4141 return false;
4142 rpc_restart_call_prepare(task);
4143 return true;
4144}
4145
d45f60c6 4146static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4147{
4148
4149 dprintk("--> %s\n", __func__);
4150
d45f60c6 4151 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4152 return -EAGAIN;
d45f60c6 4153 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4154 return -EAGAIN;
d45f60c6
WAA		 4155 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4156 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4157}
4158
d45f60c6
WAA		 4159static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4160 struct rpc_message *msg)
1da177e4 4161{
d45f60c6
WAA		 4162 hdr->timestamp = jiffies;
4163 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4164 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4165 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4166}
4167
d45f60c6
WAA		 4168static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4169 struct nfs_pgio_header *hdr)
ea7c3303 4170{
d45f60c6
WAA		 4171 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4172 &hdr->args.seq_args,
4173 &hdr->res.seq_res,
9b206149 4174 task))
ef1820f9 4175 return 0;
d45f60c6
WAA		 4176 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4177 hdr->args.lock_context,
4178 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4179 return -EIO;
d45f60c6 4180 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4181 return -EIO;
4182 return 0;
1da177e4
LT		 4183}
4184
d45f60c6
WAA		 4185static int nfs4_write_done_cb(struct rpc_task *task,
4186 struct nfs_pgio_header *hdr)
1da177e4 4187{
d45f60c6 4188 struct inode *inode = hdr->inode;
8478eaa1 4189
d45f60c6
WAA		 4190 trace_nfs4_write(hdr, task->tk_status);
4191 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4192 hdr->args.context->state,
4193 NULL) == -EAGAIN) {
d00c5d43 4194 rpc_restart_call_prepare(task);
788e7a89 4195 return -EAGAIN;
1da177e4 4196 }
4f9838c7 4197 if (task->tk_status >= 0) {
d45f60c6
WAA		 4198 renew_lease(NFS_SERVER(inode), hdr->timestamp);
4199 nfs_post_op_update_inode_force_wcc(inode, &hdr->fattr);
4f9838c7 4200 }
788e7a89 4201 return 0;
1da177e4
LT		 4202}
4203
5521abfd 4204static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4205 struct nfs_pgio_args *args)
5521abfd
TM		 4206{
4207
4208 if (!nfs4_error_stateid_expired(task->tk_status) ||
4209 nfs4_stateid_is_current(&args->stateid,
4210 args->context,
4211 args->lock_context,
4212 FMODE_WRITE))
4213 return false;
4214 rpc_restart_call_prepare(task);
4215 return true;
4216}
4217
d45f60c6 4218static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4219{
d45f60c6 4220 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4221 return -EAGAIN;
d45f60c6 4222 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4223 return -EAGAIN;
d45f60c6
WAA		 4224 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4225 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4226}
4227
5a37f851 4228static
d45f60c6 4229bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4230{
5a37f851 4231 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4232 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4233 return false;
4234 /* Otherwise, request attributes if and only if we don't hold
4235 * a delegation
4236 */
011e2a7f 4237 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4238}
a69aef14 4239
d45f60c6
WAA		 4240static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4241 struct rpc_message *msg)
1da177e4 4242{
d45f60c6 4243 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4244
d45f60c6
WAA		 4245 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4246 hdr->args.bitmask = NULL;
4247 hdr->res.fattr = NULL;
7ffd1064 4248 } else
d45f60c6 4249 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4250
d45f60c6
WAA		 4251 if (!hdr->pgio_done_cb)
4252 hdr->pgio_done_cb = nfs4_write_done_cb;
4253 hdr->res.server = server;
4254 hdr->timestamp = jiffies;
1da177e4 4255
bdc7f021 4256 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4257 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4258}
4259
0b7c0153 4260static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4261{
d9afbd1b
TM		 4262 nfs4_setup_sequence(NFS_SERVER(data->inode),
4263 &data->args.seq_args,
4264 &data->res.seq_res,
4265 task);
1da177e4
LT		 4266}
4267
0b7c0153 4268static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4269{
1da177e4 4270 struct inode *inode = data->inode;
14516c3a 4271
cc668ab3 4272 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4273 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4274 NULL, NULL) == -EAGAIN) {
d00c5d43 4275 rpc_restart_call_prepare(task);
788e7a89 4276 return -EAGAIN;
1da177e4 4277 }
788e7a89 4278 return 0;
1da177e4
LT		 4279}
4280
0b7c0153 4281static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4282{
4283 if (!nfs4_sequence_done(task, &data->res.seq_res))
4284 return -EAGAIN;
0b7c0153 4285 return data->commit_done_cb(task, data);
5f452431
FI		 4286}
4287
0b7c0153 4288static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4289{
788e7a89 4290 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4291
0b7c0153
FI		 4292 if (data->commit_done_cb == NULL)
4293 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4294 data->res.server = server;
bdc7f021 4295 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4296 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4297}
4298
9bc4e3ca
CL		 4299struct nfs4_renewdata {
4300 struct nfs_client *client;
4301 unsigned long timestamp;
4302};
4303
1da177e4
LT		 4304/*
4305 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4306 * standalone procedure for queueing an asynchronous RENEW.
4307 */
9bc4e3ca 4308static void nfs4_renew_release(void *calldata)
dc96aef9 4309{
9bc4e3ca
CL		 4310 struct nfs4_renewdata *data = calldata;
4311 struct nfs_client *clp = data->client;
dc96aef9 4312
0851de06
AB		 4313 if (atomic_read(&clp->cl_count) > 1)
4314 nfs4_schedule_state_renewal(clp);
4315 nfs_put_client(clp);
9bc4e3ca 4316 kfree(data);
dc96aef9
AB		 4317}
4318
9bc4e3ca 4319static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4320{
9bc4e3ca
CL		 4321 struct nfs4_renewdata *data = calldata;
4322 struct nfs_client *clp = data->client;
4323 unsigned long timestamp = data->timestamp;
1da177e4 4324
c6d01c6f 4325 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4326 switch (task->tk_status) {
4327 case 0:
4328 break;
4329 case -NFS4ERR_LEASE_MOVED:
4330 nfs4_schedule_lease_moved_recovery(clp);
4331 break;
4332 default:
95baa25c 4333 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4334 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4335 return;
4336 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4337 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4338 return;
4339 }
4340 nfs4_schedule_path_down_recovery(clp);
1da177e4 4341 }
452e9352 4342 do_renew_lease(clp, timestamp);
1da177e4
LT		 4343}
4344
963d8fe5
TM		 4345static const struct rpc_call_ops nfs4_renew_ops = {
4346 .rpc_call_done = nfs4_renew_done,
dc96aef9 4347 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4348};
4349
2f60ea6b 4350static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4351{
4352 struct rpc_message msg = {
4353 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4354 .rpc_argp = clp,
b4454fe1 4355 .rpc_cred = cred,
1da177e4 4356 };
9bc4e3ca 4357 struct nfs4_renewdata *data;
1da177e4 4358
2f60ea6b
TM		 4359 if (renew_flags == 0)
4360 return 0;
0851de06
AB		 4361 if (!atomic_inc_not_zero(&clp->cl_count))
4362 return -EIO;
b569ad34 4363 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4364 if (data == NULL)
4365 return -ENOMEM;
4366 data->client = clp;
4367 data->timestamp = jiffies;
bc7a05ca 4368 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4369 &nfs4_renew_ops, data);
1da177e4
LT		 4370}
4371
8534d4ec 4372static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4373{
4374 struct rpc_message msg = {
4375 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4376 .rpc_argp = clp,
b4454fe1 4377 .rpc_cred = cred,
1da177e4
LT		 4378 };
4379 unsigned long now = jiffies;
4380 int status;
4381
bc7a05ca 4382 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4383 if (status < 0)
4384 return status;
452e9352 4385 do_renew_lease(clp, now);
1da177e4
LT		 4386 return 0;
4387}
4388
aa1870af
BF		 4389static inline int nfs4_server_supports_acls(struct nfs_server *server)
4390{
7dd7d959 4391 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4392}
4393
21f498c2
TM		 4394/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4395 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4396 * the stack.
4397 */
21f498c2 4398#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4399
e9e3d724
NH		 4400static int buf_to_pages_noslab(const void *buf, size_t buflen,
4401 struct page **pages, unsigned int *pgbase)
4402{
4403 struct page *newpage, **spages;
4404 int rc = 0;
4405 size_t len;
4406 spages = pages;
4407
4408 do {
21f498c2 4409 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4410 newpage = alloc_page(GFP_KERNEL);
4411
4412 if (newpage == NULL)
4413 goto unwind;
4414 memcpy(page_address(newpage), buf, len);
4415 buf += len;
4416 buflen -= len;
4417 *pages++ = newpage;
4418 rc++;
4419 } while (buflen != 0);
4420
4421 return rc;
4422
4423unwind:
4424 for(; rc > 0; rc--)
4425 __free_page(spages[rc-1]);
4426 return -ENOMEM;
4427}
4428
e50a1c2e
BF		 4429struct nfs4_cached_acl {
4430 int cached;
4431 size_t len;
3e9d4154 4432 char data[0];
e50a1c2e
BF		 4433};
4434
4435static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4436{
4437 struct nfs_inode *nfsi = NFS_I(inode);
4438
4439 spin_lock(&inode->i_lock);
4440 kfree(nfsi->nfs4_acl);
4441 nfsi->nfs4_acl = acl;
4442 spin_unlock(&inode->i_lock);
4443}
4444
4445static void nfs4_zap_acl_attr(struct inode *inode)
4446{
4447 nfs4_set_cached_acl(inode, NULL);
4448}
4449
4450static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4451{
4452 struct nfs_inode *nfsi = NFS_I(inode);
4453 struct nfs4_cached_acl *acl;
4454 int ret = -ENOENT;
4455
4456 spin_lock(&inode->i_lock);
4457 acl = nfsi->nfs4_acl;
4458 if (acl == NULL)
4459 goto out;
4460 if (buf == NULL) /* user is just asking for length */
4461 goto out_len;
4462 if (acl->cached == 0)
4463 goto out;
4464 ret = -ERANGE; /* see getxattr(2) man page */
4465 if (acl->len > buflen)
4466 goto out;
4467 memcpy(buf, acl->data, acl->len);
4468out_len:
4469 ret = acl->len;
4470out:
4471 spin_unlock(&inode->i_lock);
4472 return ret;
4473}
4474
5794d21e 4475static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4476{
4477 struct nfs4_cached_acl *acl;
b291f1b1 4478 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4479
1f1ea6c2 4480 if (buflen <= PAGE_SIZE) {
b291f1b1 4481 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4482 if (acl == NULL)
4483 goto out;
4484 acl->cached = 1;
5794d21e 4485 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4486 } else {
4487 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4488 if (acl == NULL)
4489 goto out;
4490 acl->cached = 0;
4491 }
4492 acl->len = acl_len;
4493out:
4494 nfs4_set_cached_acl(inode, acl);
4495}
4496
bf118a34
AA		 4497/*
4498 * The getxattr API returns the required buffer length when called with a
4499 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4500 * the required buf. On a NULL buf, we send a page of data to the server
4501 * guessing that the ACL request can be serviced by a page. If so, we cache
4502 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4503 * the cache. If not so, we throw away the page, and cache the required
4504 * length. The next getxattr call will then produce another round trip to
4505 * the server, this time with the input buf of the required size.
4506 */
16b4289c 4507static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4508{
bf118a34 4509 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4510 struct nfs_getaclargs args = {
4511 .fh = NFS_FH(inode),
4512 .acl_pages = pages,
4513 .acl_len = buflen,
4514 };
663c79b3
BH		 4515 struct nfs_getaclres res = {
4516 .acl_len = buflen,
4517 };
aa1870af
BF		 4518 struct rpc_message msg = {
4519 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4520 .rpc_argp = &args,
663c79b3 4521 .rpc_resp = &res,
aa1870af 4522 };
21f498c2
TM		 4523 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4524 int ret = -ENOMEM, i;
aa1870af 4525
bf118a34
AA		 4526 /* As long as we're doing a round trip to the server anyway,
4527 * let's be prepared for a page of acl data. */
4528 if (npages == 0)
4529 npages = 1;
21f498c2
TM		 4530 if (npages > ARRAY_SIZE(pages))
4531 return -ERANGE;
5a006899 4532
bf118a34
AA		 4533 for (i = 0; i < npages; i++) {
4534 pages[i] = alloc_page(GFP_KERNEL);
4535 if (!pages[i])
4536 goto out_free;
e50a1c2e 4537 }
5a006899
SP		 4538
4539 /* for decoding across pages */
4540 res.acl_scratch = alloc_page(GFP_KERNEL);
4541 if (!res.acl_scratch)
4542 goto out_free;
4543
bf118a34
AA		 4544 args.acl_len = npages * PAGE_SIZE;
4545 args.acl_pgbase = 0;
5a006899 4546
de040bec 4547 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4548 __func__, buf, buflen, npages, args.acl_len);
4549 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4550 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4551 if (ret)
4552 goto out_free;
bf118a34 4553
1f1ea6c2
TM		 4554 /* Handle the case where the passed-in buffer is too short */
4555 if (res.acl_flags & NFS4_ACL_TRUNC) {
4556 /* Did the user only issue a request for the acl length? */
4557 if (buf == NULL)
4558 goto out_ok;
e50a1c2e 4559 ret = -ERANGE;
1f1ea6c2 4560 goto out_free;
e50a1c2e 4561 }
1f1ea6c2 4562 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4563 if (buf) {
4564 if (res.acl_len > buflen) {
4565 ret = -ERANGE;
4566 goto out_free;
4567 }
1f1ea6c2 4568 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4569 }
1f1ea6c2
TM		 4570out_ok:
4571 ret = res.acl_len;
e50a1c2e 4572out_free:
bf118a34
AA		 4573 for (i = 0; i < npages; i++)
4574 if (pages[i])
4575 __free_page(pages[i]);
331818f1
TM		 4576 if (res.acl_scratch)
4577 __free_page(res.acl_scratch);
aa1870af
BF		 4578 return ret;
4579}
4580
16b4289c
TM		 4581static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4582{
4583 struct nfs4_exception exception = { };
4584 ssize_t ret;
4585 do {
4586 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4587 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4588 if (ret >= 0)
4589 break;
4590 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4591 } while (exception.retry);
4592 return ret;
4593}
4594
e50a1c2e
BF		 4595static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4596{
4597 struct nfs_server *server = NFS_SERVER(inode);
4598 int ret;
4599
4600 if (!nfs4_server_supports_acls(server))
4601 return -EOPNOTSUPP;
4602 ret = nfs_revalidate_inode(server, inode);
4603 if (ret < 0)
4604 return ret;
08a22b39
AK		 4605 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4606 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4607 ret = nfs4_read_cached_acl(inode, buf, buflen);
4608 if (ret != -ENOENT)
bf118a34
AA		 4609 /* -ENOENT is returned if there is no ACL or if there is an ACL
4610 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4611 return ret;
4612 return nfs4_get_acl_uncached(inode, buf, buflen);
4613}
4614
16b4289c 4615static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4616{
4617 struct nfs_server *server = NFS_SERVER(inode);
4618 struct page *pages[NFS4ACL_MAXPAGES];
4619 struct nfs_setaclargs arg = {
4620 .fh = NFS_FH(inode),
4621 .acl_pages = pages,
4622 .acl_len = buflen,
4623 };
73c403a9 4624 struct nfs_setaclres res;
4b580ee3
BF		 4625 struct rpc_message msg = {
4626 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4627 .rpc_argp = &arg,
73c403a9 4628 .rpc_resp = &res,
4b580ee3 4629 };
21f498c2 4630 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4631 int ret, i;
4b580ee3
BF		 4632
4633 if (!nfs4_server_supports_acls(server))
4634 return -EOPNOTSUPP;
21f498c2
TM		 4635 if (npages > ARRAY_SIZE(pages))
4636 return -ERANGE;
e9e3d724
NH		 4637 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4638 if (i < 0)
4639 return i;
57ec14c5 4640 nfs4_inode_return_delegation(inode);
7c513058 4641 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4642
4643 /*
4644 * Free each page after tx, so the only ref left is
4645 * held by the network stack
4646 */
4647 for (; i > 0; i--)
4648 put_page(pages[i-1]);
4649
08a22b39
AK		 4650 /*
4651 * Acl update can result in inode attribute update.
4652 * so mark the attribute cache invalid.
4653 */
4654 spin_lock(&inode->i_lock);
4655 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4656 spin_unlock(&inode->i_lock);
f41f7418
TM		 4657 nfs_access_zap_cache(inode);
4658 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4659 return ret;
4660}
4661
16b4289c
TM		 4662static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4663{
4664 struct nfs4_exception exception = { };
4665 int err;
4666 do {
c1578b76
TM		 4667 err = __nfs4_proc_set_acl(inode, buf, buflen);
4668 trace_nfs4_set_acl(inode, err);
4669 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4670 &exception);
4671 } while (exception.retry);
4672 return err;
4673}
4674
aa9c2669
DQ		 4675#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4676static int _nfs4_get_security_label(struct inode *inode, void *buf,
4677 size_t buflen)
4678{
4679 struct nfs_server *server = NFS_SERVER(inode);
4680 struct nfs_fattr fattr;
4681 struct nfs4_label label = {0, 0, buflen, buf};
4682
4683 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4684 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4685 .fh = NFS_FH(inode),
4686 .bitmask = bitmask,
4687 };
4688 struct nfs4_getattr_res res = {
4689 .fattr = &fattr,
4690 .label = &label,
4691 .server = server,
4692 };
4693 struct rpc_message msg = {
4694 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4695 .rpc_argp = &arg,
aa9c2669
DQ		 4696 .rpc_resp = &res,
4697 };
4698 int ret;
4699
4700 nfs_fattr_init(&fattr);
4701
fcb63a9b 4702 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4703 if (ret)
4704 return ret;
4705 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4706 return -ENOENT;
4707 if (buflen < label.len)
4708 return -ERANGE;
4709 return 0;
4710}
4711
4712static int nfs4_get_security_label(struct inode *inode, void *buf,
4713 size_t buflen)
4714{
4715 struct nfs4_exception exception = { };
4716 int err;
4717
4718 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4719 return -EOPNOTSUPP;
4720
4721 do {
c1578b76
TM		 4722 err = _nfs4_get_security_label(inode, buf, buflen);
4723 trace_nfs4_get_security_label(inode, err);
4724 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4725 &exception);
4726 } while (exception.retry);
4727 return err;
4728}
4729
4730static int _nfs4_do_set_security_label(struct inode *inode,
4731 struct nfs4_label *ilabel,
4732 struct nfs_fattr *fattr,
4733 struct nfs4_label *olabel)
4734{
4735
4736 struct iattr sattr = {0};
4737 struct nfs_server *server = NFS_SERVER(inode);
4738 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4739 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4740 .fh = NFS_FH(inode),
4741 .iap = &sattr,
4742 .server = server,
4743 .bitmask = bitmask,
4744 .label = ilabel,
4745 };
4746 struct nfs_setattrres res = {
4747 .fattr = fattr,
4748 .label = olabel,
4749 .server = server,
4750 };
4751 struct rpc_message msg = {
4752 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4753 .rpc_argp = &arg,
aa9c2669
DQ		 4754 .rpc_resp = &res,
4755 };
4756 int status;
4757
12207f69 4758 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4759
12207f69 4760 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4761 if (status)
4762 dprintk("%s failed: %d\n", __func__, status);
4763
4764 return status;
4765}
4766
4767static int nfs4_do_set_security_label(struct inode *inode,
4768 struct nfs4_label *ilabel,
4769 struct nfs_fattr *fattr,
4770 struct nfs4_label *olabel)
4771{
4772 struct nfs4_exception exception = { };
4773 int err;
4774
4775 do {
c1578b76
TM		 4776 err = _nfs4_do_set_security_label(inode, ilabel,
4777 fattr, olabel);
4778 trace_nfs4_set_security_label(inode, err);
4779 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4780 &exception);
4781 } while (exception.retry);
4782 return err;
4783}
4784
4785static int
4786nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4787{
4788 struct nfs4_label ilabel, *olabel = NULL;
4789 struct nfs_fattr fattr;
4790 struct rpc_cred *cred;
4791 struct inode *inode = dentry->d_inode;
4792 int status;
4793
4794 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4795 return -EOPNOTSUPP;
4796
4797 nfs_fattr_init(&fattr);
4798
4799 ilabel.pi = 0;
4800 ilabel.lfs = 0;
4801 ilabel.label = (char *)buf;
4802 ilabel.len = buflen;
4803
4804 cred = rpc_lookup_cred();
4805 if (IS_ERR(cred))
4806 return PTR_ERR(cred);
4807
4808 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4809 if (IS_ERR(olabel)) {
4810 status = -PTR_ERR(olabel);
4811 goto out;
4812 }
4813
4814 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4815 if (status == 0)
4816 nfs_setsecurity(inode, &fattr, olabel);
4817
4818 nfs4_label_free(olabel);
4819out:
4820 put_rpccred(cred);
4821 return status;
4822}
4823#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4824
4825
1da177e4 4826static int
8478eaa1
N		 4827nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4828 struct nfs4_state *state, long *timeout)
1da177e4 4829{
aa5190d0
TM		 4830 struct nfs_client *clp = server->nfs_client;
4831
4832 if (task->tk_status >= 0)
1da177e4
LT		 4833 return 0;
4834 switch(task->tk_status) {
a1d0b5ee 4835 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4836 case -NFS4ERR_ADMIN_REVOKED:
4837 case -NFS4ERR_BAD_STATEID:
4838 case -NFS4ERR_OPENMODE:
4839 if (state == NULL)
4840 break;
5d422301 4841 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4842 goto recovery_failed;
0400a6b0 4843 goto wait_on_recovery;
0ced63d1 4844 case -NFS4ERR_EXPIRED:
5d422301
TM		 4845 if (state != NULL) {
4846 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4847 goto recovery_failed;
5d422301 4848 }
1da177e4 4849 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4850 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4851 nfs4_schedule_lease_recovery(clp);
4852 goto wait_on_recovery;
519ae255
CL		 4853 case -NFS4ERR_MOVED:
4854 if (nfs4_schedule_migration_recovery(server) < 0)
4855 goto recovery_failed;
4856 goto wait_on_recovery;
8ef2f8d4
CL		 4857 case -NFS4ERR_LEASE_MOVED:
4858 nfs4_schedule_lease_moved_recovery(clp);
4859 goto wait_on_recovery;
4745e315
AA		 4860#if defined(CONFIG_NFS_V4_1)
4861 case -NFS4ERR_BADSESSION:
4862 case -NFS4ERR_BADSLOT:
4863 case -NFS4ERR_BAD_HIGH_SLOT:
4864 case -NFS4ERR_DEADSESSION:
4865 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4866 case -NFS4ERR_SEQ_FALSE_RETRY:
4867 case -NFS4ERR_SEQ_MISORDERED:
4868 dprintk("%s ERROR %d, Reset session\n", __func__,
4869 task->tk_status);
9f594791 4870 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4871 goto wait_on_recovery;
4745e315 4872#endif /* CONFIG_NFS_V4_1 */
1da177e4 4873 case -NFS4ERR_DELAY:
aa5190d0 4874 nfs_inc_server_stats(server, NFSIOS_DELAY);
8478eaa1
N		 4875 rpc_delay(task, nfs4_update_delay(timeout));
4876 goto restart_call;
006ea73e 4877 case -NFS4ERR_GRACE:
1da177e4 4878 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4879 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4880 case -NFS4ERR_OLD_STATEID:
f1478c13 4881 goto restart_call;
1da177e4
LT		 4882 }
4883 task->tk_status = nfs4_map_errors(task->tk_status);
4884 return 0;
9f51a78e 4885recovery_failed:
5d422301
TM		 4886 task->tk_status = -EIO;
4887 return 0;
0400a6b0 4888wait_on_recovery:
a2c0b9e2 4889 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4890 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4891 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4892 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4893 goto recovery_failed;
f1478c13 4894restart_call:
a2c0b9e2
TM		 4895 task->tk_status = 0;
4896 return -EAGAIN;
1da177e4
LT		 4897}
4898
f092075d
CL		 4899static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4900 nfs4_verifier *bootverf)
cd93710e
CL		 4901{
4902 __be32 verf[2];
4903
2c820d9a
CL		 4904 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4905 /* An impossible timestamp guarantees this value
4906 * will never match a generated boot time. */
4907 verf[0] = 0;
17f26b12 4908 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4909 } else {
f092075d 4910 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4911 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4912 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4913 }
cd93710e
CL		 4914 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4915}
4916
e984a55a 4917static unsigned int
ceb3a16c 4918nfs4_init_nonuniform_client_string(struct nfs_client *clp,
e984a55a
CL		 4919 char *buf, size_t len)
4920{
4921 unsigned int result;
4922
ceb3a16c
TM		 4923 if (clp->cl_owner_id != NULL)
4924 return strlcpy(buf, clp->cl_owner_id, len);
4925
e984a55a
CL		 4926 rcu_read_lock();
4927 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4928 clp->cl_ipaddr,
4929 rpc_peeraddr2str(clp->cl_rpcclient,
4930 RPC_DISPLAY_ADDR),
4931 rpc_peeraddr2str(clp->cl_rpcclient,
4932 RPC_DISPLAY_PROTO));
4933 rcu_read_unlock();
ceb3a16c 4934 clp->cl_owner_id = kstrdup(buf, GFP_KERNEL);
e984a55a
CL		 4935 return result;
4936}
4937
4938static unsigned int
ceb3a16c 4939nfs4_init_uniform_client_string(struct nfs_client *clp,
e984a55a
CL		 4940 char *buf, size_t len)
4941{
55b59293 4942 const char *nodename = clp->cl_rpcclient->cl_nodename;
ceb3a16c
TM		 4943 unsigned int result;
4944
4945 if (clp->cl_owner_id != NULL)
4946 return strlcpy(buf, clp->cl_owner_id, len);
6f2ea7f2
CL		 4947
4948 if (nfs4_client_id_uniquifier[0] != '\0')
ceb3a16c 4949 result = scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
55b59293
TM		 4950 clp->rpc_ops->version,
4951 clp->cl_minorversion,
4952 nfs4_client_id_uniquifier,
4953 nodename);
ceb3a16c
TM		 4954 else
4955 result = scnprintf(buf, len, "Linux NFSv%u.%u %s",
e984a55a 4956 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4957 nodename);
ceb3a16c
TM		 4958 clp->cl_owner_id = kstrdup(buf, GFP_KERNEL);
4959 return result;
e984a55a
CL		 4960}
4961
706cb8db
CL		 4962/*
4963 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
4964 * services. Advertise one based on the address family of the
4965 * clientaddr.
4966 */
4967static unsigned int
4968nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
4969{
4970 if (strchr(clp->cl_ipaddr, ':') != NULL)
4971 return scnprintf(buf, len, "tcp6");
4972 else
4973 return scnprintf(buf, len, "tcp");
4974}
4975
f11b2a1c
JL		 4976static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
4977{
4978 struct nfs4_setclientid *sc = calldata;
4979
4980 if (task->tk_status == 0)
4981 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
4982}
4983
4984static const struct rpc_call_ops nfs4_setclientid_ops = {
4985 .rpc_call_done = nfs4_setclientid_done,
4986};
4987
6bbb4ae8
CL		 4988/**
4989 * nfs4_proc_setclientid - Negotiate client ID
4990 * @clp: state data structure
4991 * @program: RPC program for NFSv4 callback service
4992 * @port: IP port number for NFS4 callback service
4993 * @cred: RPC credential to use for this call
4994 * @res: where to place the result
4995 *
4996 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4997 */
bb8b27e5
TM		 4998int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4999 unsigned short port, struct rpc_cred *cred,
5000 struct nfs4_setclientid_res *res)
1da177e4
LT		 5001{
5002 nfs4_verifier sc_verifier;
5003 struct nfs4_setclientid setclientid = {
5004 .sc_verifier = &sc_verifier,
5005 .sc_prog = program,
f4eecd5d 5006 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 5007 };
5008 struct rpc_message msg = {
5009 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5010 .rpc_argp = &setclientid,
bb8b27e5 5011 .rpc_resp = res,
286d7d6a 5012 .rpc_cred = cred,
1da177e4 5013 };
f11b2a1c
JL		 5014 struct rpc_task *task;
5015 struct rpc_task_setup task_setup_data = {
5016 .rpc_client = clp->cl_rpcclient,
5017 .rpc_message = &msg,
5018 .callback_ops = &nfs4_setclientid_ops,
5019 .callback_data = &setclientid,
5020 .flags = RPC_TASK_TIMEOUT,
5021 };
6bbb4ae8 5022 int status;
1da177e4 5023
de734831 5024 /* nfs_client_id4 */
f092075d 5025 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 5026 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5027 setclientid.sc_name_len =
5028 nfs4_init_uniform_client_string(clp,
5029 setclientid.sc_name,
5030 sizeof(setclientid.sc_name));
5031 else
5032 setclientid.sc_name_len =
5033 nfs4_init_nonuniform_client_string(clp,
5034 setclientid.sc_name,
5035 sizeof(setclientid.sc_name));
de734831 5036 /* cb_client4 */
706cb8db
CL		 5037 setclientid.sc_netid_len =
5038 nfs4_init_callback_netid(clp,
5039 setclientid.sc_netid,
5040 sizeof(setclientid.sc_netid));
de734831 5041 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5042 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5043 clp->cl_ipaddr, port >> 8, port & 255);
5044
6bbb4ae8
CL		 5045 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
5046 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5047 setclientid.sc_name_len, setclientid.sc_name);
f11b2a1c
JL		 5048 task = rpc_run_task(&task_setup_data);
5049 if (IS_ERR(task)) {
5050 status = PTR_ERR(task);
5051 goto out;
5052 }
5053 status = task->tk_status;
5054 if (setclientid.sc_cred) {
5055 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5056 put_rpccred(setclientid.sc_cred);
5057 }
5058 rpc_put_task(task);
5059out:
c6d01c6f 5060 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5061 dprintk("NFS reply setclientid: %d\n", status);
5062 return status;
1da177e4
LT		 5063}
5064
6bbb4ae8
CL		 5065/**
5066 * nfs4_proc_setclientid_confirm - Confirm client ID
5067 * @clp: state data structure
5068 * @res: result of a previous SETCLIENTID
5069 * @cred: RPC credential to use for this call
5070 *
5071 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5072 */
fd954ae1 5073int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5074 struct nfs4_setclientid_res *arg,
5075 struct rpc_cred *cred)
1da177e4 5076{
1da177e4
LT		 5077 struct rpc_message msg = {
5078 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5079 .rpc_argp = arg,
286d7d6a 5080 .rpc_cred = cred,
1da177e4 5081 };
1da177e4
LT		 5082 int status;
5083
6bbb4ae8
CL		 5084 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5085 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5086 clp->cl_clientid);
1bd714f2 5087 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5088 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5089 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5090 return status;
5091}
5092
fe650407
TM		 5093struct nfs4_delegreturndata {
5094 struct nfs4_delegreturnargs args;
fa178f29 5095 struct nfs4_delegreturnres res;
fe650407
TM		 5096 struct nfs_fh fh;
5097 nfs4_stateid stateid;
26e976a8 5098 unsigned long timestamp;
fa178f29 5099 struct nfs_fattr fattr;
fe650407 5100 int rpc_status;
039b756a
PT		 5101 struct inode *inode;
5102 bool roc;
5103 u32 roc_barrier;
fe650407
TM		 5104};
5105
fe650407
TM		 5106static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5107{
5108 struct nfs4_delegreturndata *data = calldata;
938e1010 5109
14516c3a
TM		 5110 if (!nfs4_sequence_done(task, &data->res.seq_res))
5111 return;
938e1010 5112
ca8acf8d 5113 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5114 switch (task->tk_status) {
79708861 5115 case 0:
fa178f29 5116 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5117 case -NFS4ERR_ADMIN_REVOKED:
5118 case -NFS4ERR_DELEG_REVOKED:
5119 case -NFS4ERR_BAD_STATEID:
5120 case -NFS4ERR_OLD_STATEID:
5121 case -NFS4ERR_STALE_STATEID:
5122 case -NFS4ERR_EXPIRED:
5123 task->tk_status = 0;
039b756a
PT		 5124 if (data->roc)
5125 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5126 break;
79708861 5127 default:
8478eaa1
N		 5128 if (nfs4_async_handle_error(task, data->res.server,
5129 NULL, NULL) == -EAGAIN) {
d00c5d43 5130 rpc_restart_call_prepare(task);
79708861
RL		 5131 return;
5132 }
5133 }
5134 data->rpc_status = task->tk_status;
fe650407
TM		 5135}
5136
5137static void nfs4_delegreturn_release(void *calldata)
5138{
039b756a
PT		 5139 struct nfs4_delegreturndata *data = calldata;
5140
5141 if (data->roc)
5142 pnfs_roc_release(data->inode);
fe650407
TM		 5143 kfree(calldata);
5144}
5145
938e1010
AA		 5146static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5147{
5148 struct nfs4_delegreturndata *d_data;
5149
5150 d_data = (struct nfs4_delegreturndata *)data;
5151
039b756a
PT		 5152 if (d_data->roc &&
5153 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5154 return;
5155
d9afbd1b
TM		 5156 nfs4_setup_sequence(d_data->res.server,
5157 &d_data->args.seq_args,
5158 &d_data->res.seq_res,
5159 task);
938e1010 5160}
938e1010 5161
c8d149f3 5162static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5163 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5164 .rpc_call_done = nfs4_delegreturn_done,
5165 .rpc_release = nfs4_delegreturn_release,
5166};
5167
e6f81075 5168static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5169{
5170 struct nfs4_delegreturndata *data;
fa178f29 5171 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5172 struct rpc_task *task;
5138fde0
TM		 5173 struct rpc_message msg = {
5174 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5175 .rpc_cred = cred,
5176 };
c970aa85
TM		 5177 struct rpc_task_setup task_setup_data = {
5178 .rpc_client = server->client,
5138fde0 5179 .rpc_message = &msg,
c970aa85
TM		 5180 .callback_ops = &nfs4_delegreturn_ops,
5181 .flags = RPC_TASK_ASYNC,
5182 };
e6f81075 5183 int status = 0;
fe650407 5184
8535b2be 5185 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5186 if (data == NULL)
5187 return -ENOMEM;
a9c92d6b 5188 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5189 data->args.fhandle = &data->fh;
5190 data->args.stateid = &data->stateid;
9e907fec 5191 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5192 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5193 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5194 data->res.fattr = &data->fattr;
5195 data->res.server = server;
5138fde0 5196 nfs_fattr_init(data->res.fattr);
26e976a8 5197 data->timestamp = jiffies;
fe650407 5198 data->rpc_status = 0;
039b756a
PT		 5199 data->inode = inode;
5200 data->roc = list_empty(&NFS_I(inode)->open_files) ?
5201 pnfs_roc(inode) : false;
fe650407 5202
c970aa85 5203 task_setup_data.callback_data = data;
1174dd1f
TM		 5204 msg.rpc_argp = &data->args;
5205 msg.rpc_resp = &data->res;
c970aa85 5206 task = rpc_run_task(&task_setup_data);
7a1218a2 5207 if (IS_ERR(task))
fe650407 5208 return PTR_ERR(task);
e6f81075
TM		 5209 if (!issync)
5210 goto out;
fe650407 5211 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5212 if (status != 0)
5213 goto out;
5214 status = data->rpc_status;
e144cbcc
TM		 5215 if (status == 0)
5216 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5217 else
5218 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5219out:
e6b3c4db 5220 rpc_put_task(task);
fe650407 5221 return status;
1da177e4
LT		 5222}
5223
e6f81075 5224int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5225{
5226 struct nfs_server *server = NFS_SERVER(inode);
5227 struct nfs4_exception exception = { };
5228 int err;
5229 do {
e6f81075 5230 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5231 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5232 switch (err) {
5233 case -NFS4ERR_STALE_STATEID:
5234 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5235 case 0:
5236 return 0;
5237 }
5238 err = nfs4_handle_exception(server, err, &exception);
5239 } while (exception.retry);
5240 return err;
5241}
5242
5243#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5244#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5245
5246/*
5247 * sleep, with exponential backoff, and retry the LOCK operation.
5248 */
5249static unsigned long
5250nfs4_set_lock_task_retry(unsigned long timeout)
5251{
416ad3c9 5252 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5253 timeout <<= 1;
5254 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5255 return NFS4_LOCK_MAXTIMEOUT;
5256 return timeout;
5257}
5258
1da177e4
LT		 5259static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5260{
5261 struct inode *inode = state->inode;
5262 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5263 struct nfs_client *clp = server->nfs_client;
911d1aaf 5264 struct nfs_lockt_args arg = {
1da177e4 5265 .fh = NFS_FH(inode),
911d1aaf 5266 .fl = request,
1da177e4 5267 };
911d1aaf
TM		 5268 struct nfs_lockt_res res = {
5269 .denied = request,
1da177e4
LT		 5270 };
5271 struct rpc_message msg = {
5272 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5273 .rpc_argp = &arg,
5274 .rpc_resp = &res,
5275 .rpc_cred = state->owner->so_cred,
5276 };
1da177e4
LT		 5277 struct nfs4_lock_state *lsp;
5278 int status;
5279
911d1aaf 5280 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5281 status = nfs4_set_lock_state(state, request);
5282 if (status != 0)
5283 goto out;
5284 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5285 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5286 arg.lock_owner.s_dev = server->s_dev;
7c513058 5287 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5288 switch (status) {
5289 case 0:
5290 request->fl_type = F_UNLCK;
5291 break;
5292 case -NFS4ERR_DENIED:
5293 status = 0;
1da177e4 5294 }
70cc6487 5295 request->fl_ops->fl_release_private(request);
a6f951dd 5296 request->fl_ops = NULL;
8d0a8a9d 5297out:
1da177e4
LT		 5298 return status;
5299}
5300
5301static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5302{
5303 struct nfs4_exception exception = { };
5304 int err;
5305
5306 do {
d1b748a5
TM		 5307 err = _nfs4_proc_getlk(state, cmd, request);
5308 trace_nfs4_get_lock(request, state, cmd, err);
5309 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5310 &exception);
5311 } while (exception.retry);
5312 return err;
5313}
5314
5315static int do_vfs_lock(struct file *file, struct file_lock *fl)
5316{
5317 int res = 0;
5318 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5319 case FL_POSIX:
5320 res = posix_lock_file_wait(file, fl);
5321 break;
5322 case FL_FLOCK:
5323 res = flock_lock_file_wait(file, fl);
5324 break;
5325 default:
5326 BUG();
5327 }
1da177e4
LT		 5328 return res;
5329}
5330
faf5f49c 5331struct nfs4_unlockdata {
911d1aaf
TM		 5332 struct nfs_locku_args arg;
5333 struct nfs_locku_res res;
faf5f49c
TM		 5334 struct nfs4_lock_state *lsp;
5335 struct nfs_open_context *ctx;
911d1aaf
TM		 5336 struct file_lock fl;
5337 const struct nfs_server *server;
26e976a8 5338 unsigned long timestamp;
faf5f49c
TM		 5339};
5340
911d1aaf
TM		 5341static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5342 struct nfs_open_context *ctx,
5343 struct nfs4_lock_state *lsp,
5344 struct nfs_seqid *seqid)
5345{
5346 struct nfs4_unlockdata *p;
5347 struct inode *inode = lsp->ls_state->inode;
5348
8535b2be 5349 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5350 if (p == NULL)
5351 return NULL;
5352 p->arg.fh = NFS_FH(inode);
5353 p->arg.fl = &p->fl;
5354 p->arg.seqid = seqid;
c1d51931 5355 p->res.seqid = seqid;
911d1aaf
TM		 5356 p->arg.stateid = &lsp->ls_stateid;
5357 p->lsp = lsp;
5358 atomic_inc(&lsp->ls_count);
5359 /* Ensure we don't close file until we're done freeing locks! */
5360 p->ctx = get_nfs_open_context(ctx);
5361 memcpy(&p->fl, fl, sizeof(p->fl));
5362 p->server = NFS_SERVER(inode);
5363 return p;
5364}
5365
06f814a3 5366static void nfs4_locku_release_calldata(void *data)
faf5f49c 5367{
963d8fe5 5368 struct nfs4_unlockdata *calldata = data;
911d1aaf 5369 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5370 nfs4_put_lock_state(calldata->lsp);
5371 put_nfs_open_context(calldata->ctx);
5372 kfree(calldata);
faf5f49c
TM		 5373}
5374
963d8fe5 5375static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5376{
963d8fe5 5377 struct nfs4_unlockdata *calldata = data;
faf5f49c 5378
14516c3a
TM		 5379 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5380 return;
faf5f49c
TM		 5381 switch (task->tk_status) {
5382 case 0:
f597c537
TM		 5383 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5384 &calldata->res.stateid);
26e976a8 5385 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5386 break;
9e33bed5
TM		 5387 case -NFS4ERR_BAD_STATEID:
5388 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5389 case -NFS4ERR_STALE_STATEID:
5390 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5391 break;
5392 default:
8478eaa1
N		 5393 if (nfs4_async_handle_error(task, calldata->server,
5394 NULL, NULL) == -EAGAIN)
d00c5d43 5395 rpc_restart_call_prepare(task);
faf5f49c 5396 }
2b1bc308 5397 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5398}
5399
4ce70ada 5400static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5401{
4ce70ada 5402 struct nfs4_unlockdata *calldata = data;
faf5f49c 5403
911d1aaf 5404 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5405 goto out_wait;
795a88c9 5406 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5407 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5408 goto out_no_action;
faf5f49c 5409 }
26e976a8 5410 calldata->timestamp = jiffies;
035168ab 5411 if (nfs4_setup_sequence(calldata->server,
a893693c 5412 &calldata->arg.seq_args,
2240a9e2
TM		 5413 &calldata->res.seq_res,
5414 task) != 0)
5415 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5416 return;
5417out_no_action:
5418 task->tk_action = NULL;
5419out_wait:
5420 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5421}
5422
963d8fe5 5423static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5424 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5425 .rpc_call_done = nfs4_locku_done,
06f814a3 5426 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5427};
5428
a5d16a4d
TM		 5429static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5430 struct nfs_open_context *ctx,
5431 struct nfs4_lock_state *lsp,
5432 struct nfs_seqid *seqid)
5433{
5434 struct nfs4_unlockdata *data;
5138fde0
TM		 5435 struct rpc_message msg = {
5436 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5437 .rpc_cred = ctx->cred,
5438 };
c970aa85
TM		 5439 struct rpc_task_setup task_setup_data = {
5440 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5441 .rpc_message = &msg,
c970aa85 5442 .callback_ops = &nfs4_locku_ops,
101070ca 5443 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5444 .flags = RPC_TASK_ASYNC,
5445 };
a5d16a4d 5446
fa940720
WAA		 5447 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5448 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5449
137d6aca
FF		 5450 /* Ensure this is an unlock - when canceling a lock, the
5451 * canceled lock is passed in, and it won't be an unlock.
5452 */
5453 fl->fl_type = F_UNLCK;
5454
a5d16a4d
TM		 5455 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5456 if (data == NULL) {
5457 nfs_free_seqid(seqid);
5458 return ERR_PTR(-ENOMEM);
5459 }
5460
a9c92d6b 5461 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5462 msg.rpc_argp = &data->arg;
5463 msg.rpc_resp = &data->res;
c970aa85
TM		 5464 task_setup_data.callback_data = data;
5465 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5466}
5467
faf5f49c
TM		 5468static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5469{
65b62a29
TM		 5470 struct inode *inode = state->inode;
5471 struct nfs4_state_owner *sp = state->owner;
5472 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5473 struct nfs_seqid *seqid;
1da177e4 5474 struct nfs4_lock_state *lsp;
06f814a3
TM		 5475 struct rpc_task *task;
5476 int status = 0;
536ff0f8 5477 unsigned char fl_flags = request->fl_flags;
faf5f49c 5478
8d0a8a9d 5479 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5480 /* Unlock _before_ we do the RPC call */
5481 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5482 /* Exclude nfs_delegation_claim_locks() */
5483 mutex_lock(&sp->so_delegreturn_mutex);
5484 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5485 down_read(&nfsi->rwsem);
5486 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5487 up_read(&nfsi->rwsem);
65b62a29 5488 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5489 goto out;
19e03c57
TM		 5490 }
5491 up_read(&nfsi->rwsem);
65b62a29 5492 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5493 if (status != 0)
9b073574
TM		 5494 goto out;
5495 /* Is this a delegated lock? */
8d0a8a9d 5496 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5497 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5498 goto out;
8535b2be 5499 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5500 status = -ENOMEM;
911d1aaf 5501 if (seqid == NULL)
9b073574 5502 goto out;
cd3758e3 5503 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5504 status = PTR_ERR(task);
5505 if (IS_ERR(task))
9b073574 5506 goto out;
a5d16a4d 5507 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5508 rpc_put_task(task);
9b073574 5509out:
536ff0f8 5510 request->fl_flags = fl_flags;
d1b748a5 5511 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5512 return status;
5513}
5514
a5d16a4d
TM		 5515struct nfs4_lockdata {
5516 struct nfs_lock_args arg;
5517 struct nfs_lock_res res;
5518 struct nfs4_lock_state *lsp;
5519 struct nfs_open_context *ctx;
5520 struct file_lock fl;
26e976a8 5521 unsigned long timestamp;
a5d16a4d
TM		 5522 int rpc_status;
5523 int cancelled;
66179efe 5524 struct nfs_server *server;
a5d16a4d
TM		 5525};
5526
5527static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5528 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5529 gfp_t gfp_mask)
1da177e4 5530{
a5d16a4d
TM		 5531 struct nfs4_lockdata *p;
5532 struct inode *inode = lsp->ls_state->inode;
1da177e4 5533 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5534
8535b2be 5535 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5536 if (p == NULL)
5537 return NULL;
5538
5539 p->arg.fh = NFS_FH(inode);
5540 p->arg.fl = &p->fl;
8535b2be 5541 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5542 if (p->arg.open_seqid == NULL)
5543 goto out_free;
8535b2be 5544 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5545 if (p->arg.lock_seqid == NULL)
2f74c0a0 5546 goto out_free_seqid;
a5d16a4d 5547 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5548 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5549 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5550 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5551 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5552 p->lsp = lsp;
66179efe 5553 p->server = server;
a5d16a4d
TM		 5554 atomic_inc(&lsp->ls_count);
5555 p->ctx = get_nfs_open_context(ctx);
5556 memcpy(&p->fl, fl, sizeof(p->fl));
5557 return p;
2f74c0a0
TM		 5558out_free_seqid:
5559 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5560out_free:
5561 kfree(p);
5562 return NULL;
5563}
5564
5565static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5566{
5567 struct nfs4_lockdata *data = calldata;
5568 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5569
3110ff80 5570 dprintk("%s: begin!\n", __func__);
2f74c0a0 5571 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5572 goto out_wait;
a5d16a4d
TM		 5573 /* Do we need to do an open_to_lock_owner? */
5574 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5575 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5576 goto out_release_lock_seqid;
8fe72bac 5577 }
8e472f33 5578 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5579 data->arg.new_lock_owner = 1;
c1d51931 5580 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5581 } else
5582 data->arg.new_lock_owner = 0;
5d422301
TM		 5583 if (!nfs4_valid_open_stateid(state)) {
5584 data->rpc_status = -EBADF;
5585 task->tk_action = NULL;
5586 goto out_release_open_seqid;
5587 }
26e976a8 5588 data->timestamp = jiffies;
035168ab
TM		 5589 if (nfs4_setup_sequence(data->server,
5590 &data->arg.seq_args,
2240a9e2 5591 &data->res.seq_res,
d9afbd1b 5592 task) == 0)
66179efe 5593 return;
5d422301 5594out_release_open_seqid:
2240a9e2
TM		 5595 nfs_release_seqid(data->arg.open_seqid);
5596out_release_lock_seqid:
5597 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5598out_wait:
5599 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5600 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5601}
5602
a5d16a4d
TM		 5603static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5604{
5605 struct nfs4_lockdata *data = calldata;
5606
3110ff80 5607 dprintk("%s: begin!\n", __func__);
a5d16a4d 5608
14516c3a
TM		 5609 if (!nfs4_sequence_done(task, &data->res.seq_res))
5610 return;
66179efe 5611
a5d16a4d 5612 data->rpc_status = task->tk_status;
a5d16a4d 5613 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5614 if (data->rpc_status == 0)
5615 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5616 else
5617 goto out;
5618 }
5619 if (data->rpc_status == 0) {
f597c537 5620 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5621 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5622 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5623 }
a5d16a4d 5624out:
3110ff80 5625 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5626}
5627
5628static void nfs4_lock_release(void *calldata)
5629{
5630 struct nfs4_lockdata *data = calldata;
5631
3110ff80 5632 dprintk("%s: begin!\n", __func__);
2f74c0a0 5633 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5634 if (data->cancelled != 0) {
5635 struct rpc_task *task;
5636 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5637 data->arg.lock_seqid);
5638 if (!IS_ERR(task))
bf294b41 5639 rpc_put_task_async(task);
3110ff80 5640 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5641 } else
5642 nfs_free_seqid(data->arg.lock_seqid);
5643 nfs4_put_lock_state(data->lsp);
5644 put_nfs_open_context(data->ctx);
5645 kfree(data);
3110ff80 5646 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5647}
5648
5649static const struct rpc_call_ops nfs4_lock_ops = {
5650 .rpc_call_prepare = nfs4_lock_prepare,
5651 .rpc_call_done = nfs4_lock_done,
5652 .rpc_release = nfs4_lock_release,
5653};
5654
2bee72a6
TM		 5655static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5656{
2bee72a6
TM		 5657 switch (error) {
5658 case -NFS4ERR_ADMIN_REVOKED:
5659 case -NFS4ERR_BAD_STATEID:
ecac799a 5660 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5661 if (new_lock_owner != 0 ||
795a88c9 5662 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5663 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5664 break;
5665 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5666 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5667 case -NFS4ERR_EXPIRED:
5668 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5669 };
5670}
5671
afe6c27c 5672static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5673{
5674 struct nfs4_lockdata *data;
5675 struct rpc_task *task;
5138fde0
TM		 5676 struct rpc_message msg = {
5677 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5678 .rpc_cred = state->owner->so_cred,
5679 };
c970aa85
TM		 5680 struct rpc_task_setup task_setup_data = {
5681 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5682 .rpc_message = &msg,
c970aa85 5683 .callback_ops = &nfs4_lock_ops,
101070ca 5684 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5685 .flags = RPC_TASK_ASYNC,
5686 };
a5d16a4d
TM		 5687 int ret;
5688
3110ff80 5689 dprintk("%s: begin!\n", __func__);
cd3758e3 5690 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5691 fl->fl_u.nfs4_fl.owner,
5692 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5693 if (data == NULL)
5694 return -ENOMEM;
5695 if (IS_SETLKW(cmd))
5696 data->arg.block = 1;
a9c92d6b 5697 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5698 msg.rpc_argp = &data->arg;
5699 msg.rpc_resp = &data->res;
c970aa85 5700 task_setup_data.callback_data = data;
8fe72bac
TM		 5701 if (recovery_type > NFS_LOCK_NEW) {
5702 if (recovery_type == NFS_LOCK_RECLAIM)
5703 data->arg.reclaim = NFS_LOCK_RECLAIM;
5704 nfs4_set_sequence_privileged(&data->arg.seq_args);
5705 }
c970aa85 5706 task = rpc_run_task(&task_setup_data);
7a1218a2 5707 if (IS_ERR(task))
a5d16a4d 5708 return PTR_ERR(task);
a5d16a4d
TM		 5709 ret = nfs4_wait_for_completion_rpc_task(task);
5710 if (ret == 0) {
5711 ret = data->rpc_status;
2bee72a6
TM		 5712 if (ret)
5713 nfs4_handle_setlk_error(data->server, data->lsp,
5714 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5715 } else
5716 data->cancelled = 1;
e6b3c4db 5717 rpc_put_task(task);
3110ff80 5718 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5719 return ret;
1da177e4
LT		 5720}
5721
5722static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5723{
202b50dc 5724 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5725 struct nfs4_exception exception = {
5726 .inode = state->inode,
5727 };
202b50dc
TM		 5728 int err;
5729
5730 do {
42a2d13e
TM		 5731 /* Cache the lock if possible... */
5732 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5733 return 0;
afe6c27c 5734 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5735 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5736 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5737 break;
5738 nfs4_handle_exception(server, err, &exception);
5739 } while (exception.retry);
5740 return err;
1da177e4
LT		 5741}
5742
5743static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5744{
202b50dc 5745 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5746 struct nfs4_exception exception = {
5747 .inode = state->inode,
5748 };
202b50dc
TM		 5749 int err;
5750
6bfc93ef
TM		 5751 err = nfs4_set_lock_state(state, request);
5752 if (err != 0)
5753 return err;
f6de7a39 5754 if (!recover_lost_locks) {
ef1820f9
N		 5755 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5756 return 0;
5757 }
202b50dc 5758 do {
42a2d13e
TM		 5759 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5760 return 0;
afe6c27c 5761 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5762 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5763 switch (err) {
5764 default:
5765 goto out;
5766 case -NFS4ERR_GRACE:
5767 case -NFS4ERR_DELAY:
5768 nfs4_handle_exception(server, err, &exception);
5769 err = 0;
5770 }
202b50dc 5771 } while (exception.retry);
a9ed2e25 5772out:
202b50dc 5773 return err;
1da177e4
LT		 5774}
5775
f062eb6c 5776#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5777/**
5778 * nfs41_check_expired_locks - possibly free a lock stateid
5779 *
5780 * @state: NFSv4 state for an inode
5781 *
5782 * Returns NFS_OK if recovery for this stateid is now finished.
5783 * Otherwise a negative NFS4ERR value is returned.
5784 */
b01dd1d8 5785static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5786{
eb64cf96 5787 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5788 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5789 struct nfs_server *server = NFS_SERVER(state->inode);
5790
b01dd1d8 5791 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5792 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5793 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5794
5795 status = nfs41_test_stateid(server,
5796 &lsp->ls_stateid,
5797 cred);
08cb47fa 5798 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5799 if (status != NFS_OK) {
3e60ffdd
CL		 5800 /* Free the stateid unless the server
5801 * informs us the stateid is unrecognized. */
89af2739
CL		 5802 if (status != -NFS4ERR_BAD_STATEID)
5803 nfs41_free_stateid(server,
ab7cb0df
TM		 5804 &lsp->ls_stateid,
5805 cred);
795a88c9 5806 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5807 ret = status;
5808 }
5809 }
5810 };
5811
5812 return ret;
5813}
5814
5815static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5816{
5817 int status = NFS_OK;
5818
5819 if (test_bit(LK_STATE_IN_USE, &state->flags))
5820 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5821 if (status != NFS_OK)
5822 status = nfs4_lock_expired(state, request);
5823 return status;
f062eb6c
BS		 5824}
5825#endif
5826
1da177e4
LT		 5827static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5828{
9a99af49 5829 struct nfs4_state_owner *sp = state->owner;
19e03c57 5830 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5831 unsigned char fl_flags = request->fl_flags;
9a99af49 5832 unsigned int seq;
8e469ebd 5833 int status = -ENOLCK;
1da177e4 5834
8e469ebd
TM		 5835 if ((fl_flags & FL_POSIX) &&
5836 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5837 goto out;
6bfc93ef 5838 /* Is this a delegated open? */
6bfc93ef
TM		 5839 status = nfs4_set_lock_state(state, request);
5840 if (status != 0)
5841 goto out;
01c3b861
TM		 5842 request->fl_flags |= FL_ACCESS;
5843 status = do_vfs_lock(request->fl_file, request);
5844 if (status < 0)
5845 goto out;
19e03c57 5846 down_read(&nfsi->rwsem);
01c3b861 5847 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5848 /* Yes: cache locks! */
01c3b861 5849 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5850 request->fl_flags = fl_flags & ~FL_SLEEP;
5851 status = do_vfs_lock(request->fl_file, request);
5852 goto out_unlock;
01c3b861 5853 }
9a99af49
TM		 5854 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5855 up_read(&nfsi->rwsem);
afe6c27c 5856 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5857 if (status != 0)
9a99af49
TM		 5858 goto out;
5859 down_read(&nfsi->rwsem);
5860 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5861 status = -NFS4ERR_DELAY;
01c3b861 5862 goto out_unlock;
9a99af49 5863 }
6bfc93ef 5864 /* Note: we always want to sleep here! */
01c3b861 5865 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5866 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5867 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5868 "manager!\n", __func__);
01c3b861 5869out_unlock:
19e03c57 5870 up_read(&nfsi->rwsem);
01c3b861
TM		 5871out:
5872 request->fl_flags = fl_flags;
1da177e4
LT		 5873 return status;
5874}
5875
5876static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5877{
a1d0b5ee
TM		 5878 struct nfs4_exception exception = {
5879 .state = state,
05ffe24f 5880 .inode = state->inode,
a1d0b5ee 5881 };
1da177e4
LT		 5882 int err;
5883
5884 do {
965b5d67 5885 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5886 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5887 if (err == -NFS4ERR_DENIED)
5888 err = -EAGAIN;
1da177e4 5889 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5890 err, &exception);
1da177e4
LT		 5891 } while (exception.retry);
5892 return err;
5893}
5894
5895static int
5896nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5897{
5898 struct nfs_open_context *ctx;
5899 struct nfs4_state *state;
5900 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5901 int status;
5902
5903 /* verify open state */
cd3758e3 5904 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5905 state = ctx->state;
5906
5907 if (request->fl_start < 0 || request->fl_end < 0)
5908 return -EINVAL;
5909
d953126a
TM		 5910 if (IS_GETLK(cmd)) {
5911 if (state != NULL)
5912 return nfs4_proc_getlk(state, F_GETLK, request);
5913 return 0;
5914 }
1da177e4
LT		 5915
5916 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5917 return -EINVAL;
5918
d953126a
TM		 5919 if (request->fl_type == F_UNLCK) {
5920 if (state != NULL)
5921 return nfs4_proc_unlck(state, cmd, request);
5922 return 0;
5923 }
1da177e4 5924
d953126a
TM		 5925 if (state == NULL)
5926 return -ENOLCK;
55725513
TM		 5927 /*
5928 * Don't rely on the VFS having checked the file open mode,
5929 * since it won't do this for flock() locks.
5930 */
f44106e2 5931 switch (request->fl_type) {
55725513
TM		 5932 case F_RDLCK:
5933 if (!(filp->f_mode & FMODE_READ))
5934 return -EBADF;
5935 break;
5936 case F_WRLCK:
5937 if (!(filp->f_mode & FMODE_WRITE))
5938 return -EBADF;
5939 }
5940
1da177e4
LT		 5941 do {
5942 status = nfs4_proc_setlk(state, cmd, request);
5943 if ((status != -EAGAIN) || IS_SETLK(cmd))
5944 break;
5945 timeout = nfs4_set_lock_task_retry(timeout);
5946 status = -ERESTARTSYS;
5947 if (signalled())
5948 break;
5949 } while(status < 0);
1da177e4
LT		 5950 return status;
5951}
5952
db4f2e63 5953int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5954{
5955 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5956 int err;
5957
5958 err = nfs4_set_lock_state(state, fl);
5959 if (err != 0)
db4f2e63 5960 return err;
4a706fa0 5961 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5962 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5963}
6b3b5496 5964
cf470c3e
TM		 5965struct nfs_release_lockowner_data {
5966 struct nfs4_lock_state *lsp;
5ae67c4f 5967 struct nfs_server *server;
cf470c3e 5968 struct nfs_release_lockowner_args args;
b7e63a10 5969 struct nfs_release_lockowner_res res;
60ea6812 5970 unsigned long timestamp;
cf470c3e
TM		 5971};
5972
fbd4bfd1
CL		 5973static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5974{
5975 struct nfs_release_lockowner_data *data = calldata;
5b53dc88
KM		 5976 struct nfs_server *server = data->server;
5977 nfs40_setup_sequence(server, &data->args.seq_args,
5978 &data->res.seq_res, task);
5979 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 5980 data->timestamp = jiffies;
fbd4bfd1
CL		 5981}
5982
5983static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5984{
5985 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 5986 struct nfs_server *server = data->server;
5987
b7e63a10 5988 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 5989
5990 switch (task->tk_status) {
5991 case 0:
5992 renew_lease(server, data->timestamp);
5993 break;
5994 case -NFS4ERR_STALE_CLIENTID:
5995 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 5996 nfs4_schedule_lease_recovery(server->nfs_client);
5997 break;
60ea6812
CL		 5998 case -NFS4ERR_LEASE_MOVED:
5999 case -NFS4ERR_DELAY:
8478eaa1
N		 6000 if (nfs4_async_handle_error(task, server,
6001 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6002 rpc_restart_call_prepare(task);
6003 }
fbd4bfd1
CL		 6004}
6005
d3c7b7cc
TM		 6006static void nfs4_release_lockowner_release(void *calldata)
6007{
cf470c3e 6008 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6009 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6010 kfree(calldata);
6011}
6012
17280175 6013static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6014 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6015 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6016 .rpc_release = nfs4_release_lockowner_release,
6017};
6018
f1cdae87
JL		 6019static void
6020nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6021{
cf470c3e 6022 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6023 struct rpc_message msg = {
6024 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6025 };
6026
6027 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6028 return;
fbd4bfd1 6029
cf470c3e
TM		 6030 data = kmalloc(sizeof(*data), GFP_NOFS);
6031 if (!data)
f1cdae87 6032 return;
cf470c3e 6033 data->lsp = lsp;
5ae67c4f 6034 data->server = server;
cf470c3e
TM		 6035 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6036 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6037 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6038
cf470c3e 6039 msg.rpc_argp = &data->args;
b7e63a10
TM		 6040 msg.rpc_resp = &data->res;
6041 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6042 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6043}
6044
aa1870af
BF		 6045#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6046
64c2ce8b
AK		 6047static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6048 const void *buf, size_t buflen,
6049 int flags, int type)
6b3b5496 6050{
64c2ce8b
AK		 6051 if (strcmp(key, "") != 0)
6052 return -EINVAL;
4b580ee3 6053
64c2ce8b 6054 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6055}
6056
64c2ce8b
AK		 6057static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6058 void *buf, size_t buflen, int type)
6b3b5496 6059{
64c2ce8b
AK		 6060 if (strcmp(key, "") != 0)
6061 return -EINVAL;
aa1870af 6062
64c2ce8b 6063 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 6064}
6065
64c2ce8b
AK		 6066static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6067 size_t list_len, const char *name,
6068 size_t name_len, int type)
6b3b5496 6069{
64c2ce8b 6070 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6071
096455a2
BF		 6072 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
6073 return 0;
64c2ce8b
AK		 6074
6075 if (list && len <= list_len)
6076 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6077 return len;
6b3b5496
BF		 6078}
6079
c9bccef6
DQ		 6080#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6081static inline int nfs4_server_supports_labels(struct nfs_server *server)
6082{
6083 return server->caps & NFS_CAP_SECURITY_LABEL;
6084}
6085
6086static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6087 const void *buf, size_t buflen,
6088 int flags, int type)
6089{
6090 if (security_ismaclabel(key))
6091 return nfs4_set_security_label(dentry, buf, buflen);
6092
6093 return -EOPNOTSUPP;
6094}
6095
6096static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6097 void *buf, size_t buflen, int type)
6098{
6099 if (security_ismaclabel(key))
6100 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
6101 return -EOPNOTSUPP;
6102}
6103
6104static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6105 size_t list_len, const char *name,
6106 size_t name_len, int type)
6107{
6108 size_t len = 0;
6109
6110 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
6111 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
6112 if (list && len <= list_len)
6113 security_inode_listsecurity(dentry->d_inode, list, len);
6114 }
6115 return len;
6116}
6117
6118static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6119 .prefix = XATTR_SECURITY_PREFIX,
6120 .list = nfs4_xattr_list_nfs4_label,
6121 .get = nfs4_xattr_get_nfs4_label,
6122 .set = nfs4_xattr_set_nfs4_label,
6123};
6124#endif
6125
6126
533eb461
AA		 6127/*
6128 * nfs_fhget will use either the mounted_on_fileid or the fileid
6129 */
69aaaae1
TM		 6130static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6131{
533eb461
AA		 6132 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6133 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6134 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6135 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6136 return;
6137
6138 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6139 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6140 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6141 fattr->nlink = 2;
6142}
6143
f05d147f
BS		 6144static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6145 const struct qstr *name,
6146 struct nfs4_fs_locations *fs_locations,
6147 struct page *page)
683b57b4
TM		 6148{
6149 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6150 u32 bitmask[3] = {
361e624f 6151 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6152 };
6153 struct nfs4_fs_locations_arg args = {
6154 .dir_fh = NFS_FH(dir),
c228fd3a 6155 .name = name,
683b57b4
TM		 6156 .page = page,
6157 .bitmask = bitmask,
6158 };
22958463
BH		 6159 struct nfs4_fs_locations_res res = {
6160 .fs_locations = fs_locations,
6161 };
683b57b4
TM		 6162 struct rpc_message msg = {
6163 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6164 .rpc_argp = &args,
22958463 6165 .rpc_resp = &res,
683b57b4
TM		 6166 };
6167 int status;
6168
3110ff80 6169 dprintk("%s: start\n", __func__);
533eb461
AA		 6170
6171 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6172 * is not supported */
6173 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6174 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6175 else
6176 bitmask[0] |= FATTR4_WORD0_FILEID;
6177
c228fd3a 6178 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6179 fs_locations->server = server;
830b8e33 6180 fs_locations->nlocations = 0;
f05d147f 6181 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6182 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6183 return status;
6184}
6185
f05d147f
BS		 6186int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6187 const struct qstr *name,
6188 struct nfs4_fs_locations *fs_locations,
6189 struct page *page)
db0a9593
BS		 6190{
6191 struct nfs4_exception exception = { };
6192 int err;
6193 do {
078ea3df
TM		 6194 err = _nfs4_proc_fs_locations(client, dir, name,
6195 fs_locations, page);
6196 trace_nfs4_get_fs_locations(dir, name, err);
6197 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6198 &exception);
6199 } while (exception.retry);
6200 return err;
6201}
6202
b03d735b
CL		 6203/*
6204 * This operation also signals the server that this client is
6205 * performing migration recovery. The server can stop returning
6206 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6207 * appended to this compound to identify the client ID which is
6208 * performing recovery.
6209 */
6210static int _nfs40_proc_get_locations(struct inode *inode,
6211 struct nfs4_fs_locations *locations,
6212 struct page *page, struct rpc_cred *cred)
6213{
6214 struct nfs_server *server = NFS_SERVER(inode);
6215 struct rpc_clnt *clnt = server->client;
6216 u32 bitmask[2] = {
6217 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6218 };
6219 struct nfs4_fs_locations_arg args = {
6220 .clientid = server->nfs_client->cl_clientid,
6221 .fh = NFS_FH(inode),
6222 .page = page,
6223 .bitmask = bitmask,
6224 .migration = 1, /* skip LOOKUP */
6225 .renew = 1, /* append RENEW */
6226 };
6227 struct nfs4_fs_locations_res res = {
6228 .fs_locations = locations,
6229 .migration = 1,
6230 .renew = 1,
6231 };
6232 struct rpc_message msg = {
6233 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6234 .rpc_argp = &args,
6235 .rpc_resp = &res,
6236 .rpc_cred = cred,
6237 };
6238 unsigned long now = jiffies;
6239 int status;
6240
6241 nfs_fattr_init(&locations->fattr);
6242 locations->server = server;
6243 locations->nlocations = 0;
6244
6245 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6246 nfs4_set_sequence_privileged(&args.seq_args);
6247 status = nfs4_call_sync_sequence(clnt, server, &msg,
6248 &args.seq_args, &res.seq_res);
6249 if (status)
6250 return status;
6251
6252 renew_lease(server, now);
6253 return 0;
6254}
6255
6256#ifdef CONFIG_NFS_V4_1
6257
6258/*
6259 * This operation also signals the server that this client is
6260 * performing migration recovery. The server can stop asserting
6261 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6262 * performing this operation is identified in the SEQUENCE
6263 * operation in this compound.
6264 *
6265 * When the client supports GETATTR(fs_locations_info), it can
6266 * be plumbed in here.
6267 */
6268static int _nfs41_proc_get_locations(struct inode *inode,
6269 struct nfs4_fs_locations *locations,
6270 struct page *page, struct rpc_cred *cred)
6271{
6272 struct nfs_server *server = NFS_SERVER(inode);
6273 struct rpc_clnt *clnt = server->client;
6274 u32 bitmask[2] = {
6275 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6276 };
6277 struct nfs4_fs_locations_arg args = {
6278 .fh = NFS_FH(inode),
6279 .page = page,
6280 .bitmask = bitmask,
6281 .migration = 1, /* skip LOOKUP */
6282 };
6283 struct nfs4_fs_locations_res res = {
6284 .fs_locations = locations,
6285 .migration = 1,
6286 };
6287 struct rpc_message msg = {
6288 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6289 .rpc_argp = &args,
6290 .rpc_resp = &res,
6291 .rpc_cred = cred,
6292 };
6293 int status;
6294
6295 nfs_fattr_init(&locations->fattr);
6296 locations->server = server;
6297 locations->nlocations = 0;
6298
6299 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6300 nfs4_set_sequence_privileged(&args.seq_args);
6301 status = nfs4_call_sync_sequence(clnt, server, &msg,
6302 &args.seq_args, &res.seq_res);
6303 if (status == NFS4_OK &&
6304 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6305 status = -NFS4ERR_LEASE_MOVED;
6306 return status;
6307}
6308
6309#endif /* CONFIG_NFS_V4_1 */
6310
6311/**
6312 * nfs4_proc_get_locations - discover locations for a migrated FSID
6313 * @inode: inode on FSID that is migrating
6314 * @locations: result of query
6315 * @page: buffer
6316 * @cred: credential to use for this operation
6317 *
6318 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6319 * operation failed, or a negative errno if a local error occurred.
6320 *
6321 * On success, "locations" is filled in, but if the server has
6322 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6323 * asserted.
6324 *
6325 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6326 * from this client that require migration recovery.
6327 */
6328int nfs4_proc_get_locations(struct inode *inode,
6329 struct nfs4_fs_locations *locations,
6330 struct page *page, struct rpc_cred *cred)
6331{
6332 struct nfs_server *server = NFS_SERVER(inode);
6333 struct nfs_client *clp = server->nfs_client;
6334 const struct nfs4_mig_recovery_ops *ops =
6335 clp->cl_mvops->mig_recovery_ops;
6336 struct nfs4_exception exception = { };
6337 int status;
6338
6339 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6340 (unsigned long long)server->fsid.major,
6341 (unsigned long long)server->fsid.minor,
6342 clp->cl_hostname);
6343 nfs_display_fhandle(NFS_FH(inode), __func__);
6344
6345 do {
6346 status = ops->get_locations(inode, locations, page, cred);
6347 if (status != -NFS4ERR_DELAY)
6348 break;
6349 nfs4_handle_exception(server, status, &exception);
6350 } while (exception.retry);
6351 return status;
6352}
6353
44c99933
CL		 6354/*
6355 * This operation also signals the server that this client is
6356 * performing "lease moved" recovery. The server can stop
6357 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6358 * is appended to this compound to identify the client ID which is
6359 * performing recovery.
6360 */
6361static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6362{
6363 struct nfs_server *server = NFS_SERVER(inode);
6364 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6365 struct rpc_clnt *clnt = server->client;
6366 struct nfs4_fsid_present_arg args = {
6367 .fh = NFS_FH(inode),
6368 .clientid = clp->cl_clientid,
6369 .renew = 1, /* append RENEW */
6370 };
6371 struct nfs4_fsid_present_res res = {
6372 .renew = 1,
6373 };
6374 struct rpc_message msg = {
6375 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6376 .rpc_argp = &args,
6377 .rpc_resp = &res,
6378 .rpc_cred = cred,
6379 };
6380 unsigned long now = jiffies;
6381 int status;
6382
6383 res.fh = nfs_alloc_fhandle();
6384 if (res.fh == NULL)
6385 return -ENOMEM;
6386
6387 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6388 nfs4_set_sequence_privileged(&args.seq_args);
6389 status = nfs4_call_sync_sequence(clnt, server, &msg,
6390 &args.seq_args, &res.seq_res);
6391 nfs_free_fhandle(res.fh);
6392 if (status)
6393 return status;
6394
6395 do_renew_lease(clp, now);
6396 return 0;
6397}
6398
6399#ifdef CONFIG_NFS_V4_1
6400
6401/*
6402 * This operation also signals the server that this client is
6403 * performing "lease moved" recovery. The server can stop asserting
6404 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6405 * this operation is identified in the SEQUENCE operation in this
6406 * compound.
6407 */
6408static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6409{
6410 struct nfs_server *server = NFS_SERVER(inode);
6411 struct rpc_clnt *clnt = server->client;
6412 struct nfs4_fsid_present_arg args = {
6413 .fh = NFS_FH(inode),
6414 };
6415 struct nfs4_fsid_present_res res = {
6416 };
6417 struct rpc_message msg = {
6418 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6419 .rpc_argp = &args,
6420 .rpc_resp = &res,
6421 .rpc_cred = cred,
6422 };
6423 int status;
6424
6425 res.fh = nfs_alloc_fhandle();
6426 if (res.fh == NULL)
6427 return -ENOMEM;
6428
6429 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6430 nfs4_set_sequence_privileged(&args.seq_args);
6431 status = nfs4_call_sync_sequence(clnt, server, &msg,
6432 &args.seq_args, &res.seq_res);
6433 nfs_free_fhandle(res.fh);
6434 if (status == NFS4_OK &&
6435 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6436 status = -NFS4ERR_LEASE_MOVED;
6437 return status;
6438}
6439
6440#endif /* CONFIG_NFS_V4_1 */
6441
6442/**
6443 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6444 * @inode: inode on FSID to check
6445 * @cred: credential to use for this operation
6446 *
6447 * Server indicates whether the FSID is present, moved, or not
6448 * recognized. This operation is necessary to clear a LEASE_MOVED
6449 * condition for this client ID.
6450 *
6451 * Returns NFS4_OK if the FSID is present on this server,
6452 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6453 * NFS4ERR code if some error occurred on the server, or a
6454 * negative errno if a local failure occurred.
6455 */
6456int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6457{
6458 struct nfs_server *server = NFS_SERVER(inode);
6459 struct nfs_client *clp = server->nfs_client;
6460 const struct nfs4_mig_recovery_ops *ops =
6461 clp->cl_mvops->mig_recovery_ops;
6462 struct nfs4_exception exception = { };
6463 int status;
6464
6465 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6466 (unsigned long long)server->fsid.major,
6467 (unsigned long long)server->fsid.minor,
6468 clp->cl_hostname);
6469 nfs_display_fhandle(NFS_FH(inode), __func__);
6470
6471 do {
6472 status = ops->fsid_present(inode, cred);
6473 if (status != -NFS4ERR_DELAY)
6474 break;
6475 nfs4_handle_exception(server, status, &exception);
6476 } while (exception.retry);
6477 return status;
6478}
6479
5ec16a85 6480/**
a5250def
WAA		 6481 * If 'use_integrity' is true and the state managment nfs_client
6482 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6483 * and the machine credential as per RFC3530bis and RFC5661 Security
6484 * Considerations sections. Otherwise, just use the user cred with the
6485 * filesystem's rpc_client.
5ec16a85 6486 */
a5250def 6487static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6488{
6489 int status;
6490 struct nfs4_secinfo_arg args = {
6491 .dir_fh = NFS_FH(dir),
6492 .name = name,
6493 };
6494 struct nfs4_secinfo_res res = {
6495 .flavors = flavors,
6496 };
6497 struct rpc_message msg = {
6498 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6499 .rpc_argp = &args,
6500 .rpc_resp = &res,
6501 };
a5250def 6502 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6503 struct rpc_cred *cred = NULL;
a5250def
WAA		 6504
6505 if (use_integrity) {
6506 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6507 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6508 msg.rpc_cred = cred;
a5250def 6509 }
5a5ea0d4
BS		 6510
6511 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6512
6513 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6514 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6515
a5250def
WAA		 6516 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6517 &res.seq_res, 0);
5a5ea0d4 6518 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6519
7cb852df
WAA		 6520 if (cred)
6521 put_rpccred(cred);
a5250def 6522
5a5ea0d4
BS		 6523 return status;
6524}
6525
72de53ec
BS		 6526int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6527 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6528{
6529 struct nfs4_exception exception = { };
6530 int err;
6531 do {
a5250def
WAA		 6532 err = -NFS4ERR_WRONGSEC;
6533
6534 /* try to use integrity protection with machine cred */
6535 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6536 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6537
6538 /*
6539 * if unable to use integrity protection, or SECINFO with
6540 * integrity protection returns NFS4ERR_WRONGSEC (which is
6541 * disallowed by spec, but exists in deployed servers) use
6542 * the current filesystem's rpc_client and the user cred.
6543 */
6544 if (err == -NFS4ERR_WRONGSEC)
6545 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6546
078ea3df
TM		 6547 trace_nfs4_secinfo(dir, name, err);
6548 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6549 &exception);
6550 } while (exception.retry);
6551 return err;
6552}
6553
557134a3 6554#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6555/*
6556 * Check the exchange flags returned by the server for invalid flags, having
6557 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6558 * DS flags set.
6559 */
6560static int nfs4_check_cl_exchange_flags(u32 flags)
6561{
6562 if (flags & ~EXCHGID4_FLAG_MASK_R)
6563 goto out_inval;
6564 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6565 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6566 goto out_inval;
6567 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6568 goto out_inval;
6569 return NFS_OK;
6570out_inval:
6571 return -NFS4ERR_INVAL;
6572}
6573
78fe0f41 6574static bool
79d4e1f0
CL		 6575nfs41_same_server_scope(struct nfs41_server_scope *a,
6576 struct nfs41_server_scope *b)
78fe0f41
WAA		 6577{
6578 if (a->server_scope_sz == b->server_scope_sz &&
6579 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6580 return true;
6581
6582 return false;
6583}
6584
7c44f1ae
WAA		 6585/*
6586 * nfs4_proc_bind_conn_to_session()
6587 *
6588 * The 4.1 client currently uses the same TCP connection for the
6589 * fore and backchannel.
6590 */
2cf047c9 6591int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6592{
6593 int status;
6594 struct nfs41_bind_conn_to_session_res res;
6595 struct rpc_message msg = {
6596 .rpc_proc =
6597 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6598 .rpc_argp = clp,
6599 .rpc_resp = &res,
2cf047c9 6600 .rpc_cred = cred,
7c44f1ae
WAA		 6601 };
6602
6603 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 6604
6605 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6606 if (unlikely(res.session == NULL)) {
6607 status = -ENOMEM;
6608 goto out;
6609 }
6610
6611 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6612 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 6613 if (status == 0) {
6614 if (memcmp(res.session->sess_id.data,
6615 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6616 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6617 status = -EIO;
6618 goto out_session;
6619 }
6620 if (res.dir != NFS4_CDFS4_BOTH) {
6621 dprintk("NFS: %s: Unexpected direction from server\n",
6622 __func__);
6623 status = -EIO;
6624 goto out_session;
6625 }
6626 if (res.use_conn_in_rdma_mode) {
6627 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6628 __func__);
6629 status = -EIO;
6630 goto out_session;
6631 }
6632 }
6633out_session:
6634 kfree(res.session);
6635out:
6636 dprintk("<-- %s status= %d\n", __func__, status);
6637 return status;
6638}
6639
99fe60d0 6640/*
fa940720
WAA		 6641 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6642 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6643 */
6644static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6645 .how = SP4_MACH_CRED,
6646 .enforce.u.words = {
6647 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6648 1 << (OP_EXCHANGE_ID - 32) |
6649 1 << (OP_CREATE_SESSION - 32) |
6650 1 << (OP_DESTROY_SESSION - 32) |
6651 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6652 },
6653 .allow.u.words = {
6654 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6655 1 << (OP_LOCKU) |
6656 1 << (OP_COMMIT),
8b5bee2e 6657 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6658 1 << (OP_SECINFO_NO_NAME - 32) |
6659 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6660 1 << (OP_FREE_STATEID - 32) |
6661 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6662 }
6663};
6664
6665/*
6666 * Select the state protection mode for client `clp' given the server results
6667 * from exchange_id in `sp'.
99fe60d0 6668 *
2031cd1a
WAA		 6669 * Returns 0 on success, negative errno otherwise.
6670 */
6671static int nfs4_sp4_select_mode(struct nfs_client *clp,
6672 struct nfs41_state_protection *sp)
6673{
6674 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6675 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6676 1 << (OP_EXCHANGE_ID - 32) |
6677 1 << (OP_CREATE_SESSION - 32) |
6678 1 << (OP_DESTROY_SESSION - 32) |
6679 1 << (OP_DESTROY_CLIENTID - 32)
6680 };
6681 unsigned int i;
6682
6683 if (sp->how == SP4_MACH_CRED) {
6684 /* Print state protect result */
6685 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6686 for (i = 0; i <= LAST_NFS4_OP; i++) {
6687 if (test_bit(i, sp->enforce.u.longs))
6688 dfprintk(MOUNT, " enforce op %d\n", i);
6689 if (test_bit(i, sp->allow.u.longs))
6690 dfprintk(MOUNT, " allow op %d\n", i);
6691 }
6692
6693 /* make sure nothing is on enforce list that isn't supported */
6694 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6695 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6696 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6697 return -EINVAL;
6698 }
6699 }
6700
6701 /*
6702 * Minimal mode - state operations are allowed to use machine
6703 * credential. Note this already happens by default, so the
6704 * client doesn't have to do anything more than the negotiation.
6705 *
6706 * NOTE: we don't care if EXCHANGE_ID is in the list -
6707 * we're already using the machine cred for exchange_id
6708 * and will never use a different cred.
6709 */
6710 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6711 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6712 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6713 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6714 dfprintk(MOUNT, "sp4_mach_cred:\n");
6715 dfprintk(MOUNT, " minimal mode enabled\n");
6716 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6717 } else {
6718 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6719 return -EINVAL;
6720 }
fa940720
WAA		 6721
6722 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6723 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6724 dfprintk(MOUNT, " cleanup mode enabled\n");
6725 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6726 }
8b5bee2e
WAA		 6727
6728 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6729 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6730 dfprintk(MOUNT, " secinfo mode enabled\n");
6731 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6732 }
3787d506
WAA		 6733
6734 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6735 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6736 dfprintk(MOUNT, " stateid mode enabled\n");
6737 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6738 }
8c21c62c
WAA		 6739
6740 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6741 dfprintk(MOUNT, " write mode enabled\n");
6742 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6743 }
6744
6745 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6746 dfprintk(MOUNT, " commit mode enabled\n");
6747 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6748 }
2031cd1a
WAA		 6749 }
6750
6751 return 0;
6752}
6753
6754/*
6755 * _nfs4_proc_exchange_id()
6bbb4ae8 6756 *
2031cd1a 6757 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6758 */
2031cd1a
WAA		 6759static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6760 u32 sp4_how)
99fe60d0
BH		 6761{
6762 nfs4_verifier verifier;
6763 struct nfs41_exchange_id_args args = {
cd93710e 6764 .verifier = &verifier,
99fe60d0 6765 .client = clp,
cd3fadec 6766#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6767 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6768 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6769 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6770#else
6771 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6772 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6773#endif
99fe60d0
BH		 6774 };
6775 struct nfs41_exchange_id_res res = {
32b01310 6776 0
99fe60d0
BH		 6777 };
6778 int status;
6779 struct rpc_message msg = {
6780 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6781 .rpc_argp = &args,
6782 .rpc_resp = &res,
6783 .rpc_cred = cred,
6784 };
99fe60d0 6785
f092075d 6786 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6787 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6788 sizeof(args.id));
6bbb4ae8
CL		 6789 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6790 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6791 args.id_len, args.id);
99fe60d0 6792
acdeb69d 6793 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6794 GFP_NOFS);
acdeb69d 6795 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6796 status = -ENOMEM;
6797 goto out;
6798 }
78fe0f41 6799
79d4e1f0 6800 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6801 GFP_NOFS);
177313f1 6802 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6803 status = -ENOMEM;
acdeb69d 6804 goto out_server_owner;
abe9a6d5 6805 }
78fe0f41 6806
bbafffd2 6807 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6808 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6809 status = -ENOMEM;
6810 goto out_server_scope;
6811 }
6812
2031cd1a
WAA		 6813 switch (sp4_how) {
6814 case SP4_NONE:
6815 args.state_protect.how = SP4_NONE;
6816 break;
6817
6818 case SP4_MACH_CRED:
6819 args.state_protect = nfs4_sp4_mach_cred_request;
6820 break;
6821
6822 default:
6823 /* unsupported! */
6824 WARN_ON_ONCE(1);
6825 status = -EINVAL;
6826 goto out_server_scope;
6827 }
6828
1bd714f2 6829 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6830 trace_nfs4_exchange_id(clp, status);
177313f1 6831 if (status == 0)
32b01310 6832 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6833
2031cd1a
WAA		 6834 if (status == 0)
6835 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6836
acdeb69d 6837 if (status == 0) {
32b01310
TM		 6838 clp->cl_clientid = res.clientid;
6839 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6840 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6841 clp->cl_seqid = res.seqid;
6842
acdeb69d
CL		 6843 kfree(clp->cl_serverowner);
6844 clp->cl_serverowner = res.server_owner;
6845 res.server_owner = NULL;
78fe0f41 6846
7d2ed9ac 6847 /* use the most recent implementation id */
59155546
CL		 6848 kfree(clp->cl_implid);
6849 clp->cl_implid = res.impl_id;
7d2ed9ac 6850
177313f1 6851 if (clp->cl_serverscope != NULL &&
79d4e1f0 6852 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6853 res.server_scope)) {
6854 dprintk("%s: server_scope mismatch detected\n",
6855 __func__);
6856 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6857 kfree(clp->cl_serverscope);
6858 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6859 }
6860
177313f1 6861 if (clp->cl_serverscope == NULL) {
79d4e1f0 6862 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6863 goto out;
6864 }
32b01310
TM		 6865 } else
6866 kfree(res.impl_id);
7d2ed9ac 6867
acdeb69d
CL		 6868out_server_owner:
6869 kfree(res.server_owner);
7d2ed9ac 6870out_server_scope:
abe9a6d5
WAA		 6871 kfree(res.server_scope);
6872out:
177313f1 6873 if (clp->cl_implid != NULL)
6bbb4ae8 6874 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6875 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6876 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6877 clp->cl_implid->date.seconds,
6878 clp->cl_implid->date.nseconds);
6bbb4ae8 6879 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6880 return status;
6881}
6882
2031cd1a
WAA		 6883/*
6884 * nfs4_proc_exchange_id()
6885 *
6886 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6887 *
6888 * Since the clientid has expired, all compounds using sessions
6889 * associated with the stale clientid will be returning
6890 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6891 * be in some phase of session reset.
6892 *
6893 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6894 */
6895int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6896{
6897 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6898 int status;
6899
6900 /* try SP4_MACH_CRED if krb5i/p */
6901 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6902 authflavor == RPC_AUTH_GSS_KRB5P) {
6903 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6904 if (!status)
6905 return 0;
6906 }
6907
6908 /* try SP4_NONE */
6909 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6910}
6911
66245539
TM		 6912static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6913 struct rpc_cred *cred)
6914{
6915 struct rpc_message msg = {
6916 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6917 .rpc_argp = clp,
6918 .rpc_cred = cred,
6919 };
6920 int status;
6921
6922 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6923 trace_nfs4_destroy_clientid(clp, status);
66245539 6924 if (status)
02c67525 6925 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6926 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6927 return status;
6928}
6929
6930static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6931 struct rpc_cred *cred)
6932{
6933 unsigned int loop;
6934 int ret;
6935
6936 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6937 ret = _nfs4_proc_destroy_clientid(clp, cred);
6938 switch (ret) {
6939 case -NFS4ERR_DELAY:
6940 case -NFS4ERR_CLIENTID_BUSY:
6941 ssleep(1);
6942 break;
6943 default:
6944 return ret;
6945 }
6946 }
6947 return 0;
6948}
6949
6950int nfs4_destroy_clientid(struct nfs_client *clp)
6951{
6952 struct rpc_cred *cred;
6953 int ret = 0;
6954
6955 if (clp->cl_mvops->minor_version < 1)
6956 goto out;
6957 if (clp->cl_exchange_flags == 0)
6958 goto out;
05f4c350
CL		 6959 if (clp->cl_preserve_clid)
6960 goto out;
73d8bde5 6961 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6962 ret = nfs4_proc_destroy_clientid(clp, cred);
6963 if (cred)
6964 put_rpccred(cred);
6965 switch (ret) {
6966 case 0:
6967 case -NFS4ERR_STALE_CLIENTID:
6968 clp->cl_exchange_flags = 0;
6969 }
6970out:
6971 return ret;
6972}
6973
2050f0cc
AA		 6974struct nfs4_get_lease_time_data {
6975 struct nfs4_get_lease_time_args *args;
6976 struct nfs4_get_lease_time_res *res;
6977 struct nfs_client *clp;
6978};
6979
6980static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6981 void *calldata)
6982{
2050f0cc
AA		 6983 struct nfs4_get_lease_time_data *data =
6984 (struct nfs4_get_lease_time_data *)calldata;
6985
6986 dprintk("--> %s\n", __func__);
6987 /* just setup sequence, do not trigger session recovery
6988 since we're invoked within one */
d9afbd1b
TM		 6989 nfs41_setup_sequence(data->clp->cl_session,
6990 &data->args->la_seq_args,
6991 &data->res->lr_seq_res,
6992 task);
2050f0cc
AA		 6993 dprintk("<-- %s\n", __func__);
6994}
6995
6996/*
6997 * Called from nfs4_state_manager thread for session setup, so don't recover
6998 * from sequence operation or clientid errors.
6999 */
7000static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7001{
7002 struct nfs4_get_lease_time_data *data =
7003 (struct nfs4_get_lease_time_data *)calldata;
7004
7005 dprintk("--> %s\n", __func__);
14516c3a
TM		 7006 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7007 return;
2050f0cc
AA		 7008 switch (task->tk_status) {
7009 case -NFS4ERR_DELAY:
7010 case -NFS4ERR_GRACE:
7011 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7012 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7013 task->tk_status = 0;
a8a4ae3a
AA		 7014 /* fall through */
7015 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7016 rpc_restart_call_prepare(task);
2050f0cc
AA		 7017 return;
7018 }
2050f0cc
AA		 7019 dprintk("<-- %s\n", __func__);
7020}
7021
17280175 7022static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7023 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7024 .rpc_call_done = nfs4_get_lease_time_done,
7025};
7026
7027int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7028{
7029 struct rpc_task *task;
7030 struct nfs4_get_lease_time_args args;
7031 struct nfs4_get_lease_time_res res = {
7032 .lr_fsinfo = fsinfo,
7033 };
7034 struct nfs4_get_lease_time_data data = {
7035 .args = &args,
7036 .res = &res,
7037 .clp = clp,
7038 };
7039 struct rpc_message msg = {
7040 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7041 .rpc_argp = &args,
7042 .rpc_resp = &res,
7043 };
7044 struct rpc_task_setup task_setup = {
7045 .rpc_client = clp->cl_rpcclient,
7046 .rpc_message = &msg,
7047 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7048 .callback_data = &data,
7049 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7050 };
7051 int status;
7052
a9c92d6b 7053 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7054 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7055 dprintk("--> %s\n", __func__);
7056 task = rpc_run_task(&task_setup);
7057
7058 if (IS_ERR(task))
7059 status = PTR_ERR(task);
7060 else {
7061 status = task->tk_status;
7062 rpc_put_task(task);
7063 }
7064 dprintk("<-- %s return %d\n", __func__, status);
7065
7066 return status;
7067}
7068
fc931582
AA		 7069/*
7070 * Initialize the values to be used by the client in CREATE_SESSION
7071 * If nfs4_init_session set the fore channel request and response sizes,
7072 * use them.
7073 *
7074 * Set the back channel max_resp_sz_cached to zero to force the client to
7075 * always set csa_cachethis to FALSE because the current implementation
7076 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7077 */
7078static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7079{
18aad3d5
AA		 7080 unsigned int max_rqst_sz, max_resp_sz;
7081
7082 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7083 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7084
fc931582 7085 /* Fore channel attributes */
18aad3d5
AA		 7086 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7087 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7088 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7089 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7090
7091 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7092 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7093 __func__,
7094 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7095 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7096
7097 /* Back channel attributes */
fc931582
AA		 7098 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7099 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7100 args->bc_attrs.max_resp_sz_cached = 0;
7101 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7102 args->bc_attrs.max_reqs = 1;
7103
7104 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7105 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7106 __func__,
7107 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7108 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7109 args->bc_attrs.max_reqs);
7110}
7111
43c2e885 7112static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 7113{
43c2e885
BF		 7114 struct nfs4_channel_attrs *sent = &args->fc_attrs;
7115 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
7116
43c2e885
BF		 7117 if (rcvd->max_resp_sz > sent->max_resp_sz)
7118 return -EINVAL;
7119 /*
7120 * Our requested max_ops is the minimum we need; we're not
7121 * prepared to break up compounds into smaller pieces than that.
7122 * So, no point even trying to continue if the server won't
7123 * cooperate:
7124 */
7125 if (rcvd->max_ops < sent->max_ops)
7126 return -EINVAL;
7127 if (rcvd->max_reqs == 0)
7128 return -EINVAL;
b4b9a0c1
VG		 7129 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7130 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7131 return 0;
8d35301d
AA		 7132}
7133
43c2e885
BF		 7134static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
7135{
7136 struct nfs4_channel_attrs *sent = &args->bc_attrs;
7137 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 7138
43c2e885
BF		 7139 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7140 return -EINVAL;
7141 if (rcvd->max_resp_sz < sent->max_resp_sz)
7142 return -EINVAL;
7143 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7144 return -EINVAL;
7145 /* These would render the backchannel useless: */
b4b9a0c1 7146 if (rcvd->max_ops != sent->max_ops)
43c2e885 7147 return -EINVAL;
b4b9a0c1 7148 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 7149 return -EINVAL;
7150 return 0;
7151}
8d35301d 7152
8d35301d
AA		 7153static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
7154 struct nfs4_session *session)
7155{
43c2e885 7156 int ret;
8d35301d 7157
43c2e885
BF		 7158 ret = nfs4_verify_fore_channel_attrs(args, session);
7159 if (ret)
7160 return ret;
7161 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 7162}
7163
848f5bda
TM		 7164static int _nfs4_proc_create_session(struct nfs_client *clp,
7165 struct rpc_cred *cred)
fc931582
AA		 7166{
7167 struct nfs4_session *session = clp->cl_session;
7168 struct nfs41_create_session_args args = {
7169 .client = clp,
7170 .cb_program = NFS4_CALLBACK,
7171 };
7172 struct nfs41_create_session_res res = {
7173 .client = clp,
7174 };
7175 struct rpc_message msg = {
7176 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7177 .rpc_argp = &args,
7178 .rpc_resp = &res,
848f5bda 7179 .rpc_cred = cred,
fc931582
AA		 7180 };
7181 int status;
7182
7183 nfs4_init_channel_attrs(&args);
0f91421e 7184 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7185
1bd714f2 7186 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7187 trace_nfs4_create_session(clp, status);
fc931582 7188
43095d39 7189 if (!status) {
8d35301d
AA		 7190 /* Verify the session's negotiated channel_attrs values */
7191 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 7192 /* Increment the clientid slot sequence id */
7193 clp->cl_seqid++;
7194 }
7195
7196 return status;
7197}
7198
7199/*
7200 * Issues a CREATE_SESSION operation to the server.
7201 * It is the responsibility of the caller to verify the session is
7202 * expired before calling this routine.
7203 */
848f5bda 7204int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7205{
7206 int status;
7207 unsigned *ptr;
fc931582
AA		 7208 struct nfs4_session *session = clp->cl_session;
7209
7210 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7211
848f5bda 7212 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7213 if (status)
7214 goto out;
7215
aacd5537
AA		 7216 /* Init or reset the session slot tables */
7217 status = nfs4_setup_session_slot_tables(session);
7218 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7219 if (status)
7220 goto out;
7221
7222 ptr = (unsigned *)&session->sess_id.data[0];
7223 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7224 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7225out:
7226 dprintk("<-- %s\n", __func__);
7227 return status;
7228}
7229
0f3e66c6
AA		 7230/*
7231 * Issue the over-the-wire RPC DESTROY_SESSION.
7232 * The caller must serialize access to this routine.
7233 */
848f5bda
TM		 7234int nfs4_proc_destroy_session(struct nfs4_session *session,
7235 struct rpc_cred *cred)
0f3e66c6 7236{
848f5bda
TM		 7237 struct rpc_message msg = {
7238 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7239 .rpc_argp = session,
7240 .rpc_cred = cred,
7241 };
0f3e66c6 7242 int status = 0;
0f3e66c6
AA		 7243
7244 dprintk("--> nfs4_proc_destroy_session\n");
7245
7246 /* session is still being setup */
7247 if (session->clp->cl_cons_state != NFS_CS_READY)
7248 return status;
7249
1bd714f2 7250 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7251 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7252
7253 if (status)
08106ac7 7254 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7255 "Session has been destroyed regardless...\n", status);
7256
7257 dprintk("<-- nfs4_proc_destroy_session\n");
7258 return status;
7259}
7260
fc01cea9
AA		 7261/*
7262 * Renew the cl_session lease.
7263 */
d5f8d3fe
TM		 7264struct nfs4_sequence_data {
7265 struct nfs_client *clp;
7266 struct nfs4_sequence_args args;
7267 struct nfs4_sequence_res res;
7268};
7269
dc96aef9
AB		 7270static void nfs41_sequence_release(void *data)
7271{
d5f8d3fe
TM		 7272 struct nfs4_sequence_data *calldata = data;
7273 struct nfs_client *clp = calldata->clp;
dc96aef9 7274
7135840f
AB		 7275 if (atomic_read(&clp->cl_count) > 1)
7276 nfs4_schedule_state_renewal(clp);
7277 nfs_put_client(clp);
d5f8d3fe 7278 kfree(calldata);
dc96aef9
AB		 7279}
7280
aa5190d0
TM		 7281static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7282{
7283 switch(task->tk_status) {
7284 case -NFS4ERR_DELAY:
aa5190d0
TM		 7285 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7286 return -EAGAIN;
7287 default:
0400a6b0 7288 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7289 }
7290 return 0;
7291}
7292
dc96aef9 7293static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7294{
d5f8d3fe
TM		 7295 struct nfs4_sequence_data *calldata = data;
7296 struct nfs_client *clp = calldata->clp;
fc01cea9 7297
14516c3a
TM		 7298 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7299 return;
fc01cea9 7300
c6d01c6f 7301 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7302 if (task->tk_status < 0) {
7303 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7304 if (atomic_read(&clp->cl_count) == 1)
7305 goto out;
fc01cea9 7306
aa5190d0
TM		 7307 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7308 rpc_restart_call_prepare(task);
fc01cea9
AA		 7309 return;
7310 }
7311 }
fc01cea9 7312 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7313out:
fc01cea9
AA		 7314 dprintk("<-- %s\n", __func__);
7315}
7316
7317static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7318{
d5f8d3fe
TM		 7319 struct nfs4_sequence_data *calldata = data;
7320 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7321 struct nfs4_sequence_args *args;
7322 struct nfs4_sequence_res *res;
7323
fc01cea9
AA		 7324 args = task->tk_msg.rpc_argp;
7325 res = task->tk_msg.rpc_resp;
7326
d9afbd1b 7327 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7328}
7329
7330static const struct rpc_call_ops nfs41_sequence_ops = {
7331 .rpc_call_done = nfs41_sequence_call_done,
7332 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7333 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7334};
7335
8fe72bac
TM		 7336static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7337 struct rpc_cred *cred,
7338 bool is_privileged)
fc01cea9 7339{
d5f8d3fe 7340 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7341 struct rpc_message msg = {
7342 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7343 .rpc_cred = cred,
7344 };
71ac6da9
TM		 7345 struct rpc_task_setup task_setup_data = {
7346 .rpc_client = clp->cl_rpcclient,
7347 .rpc_message = &msg,
8fe72bac 7348 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7349 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7350 };
fc01cea9 7351
7135840f 7352 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7353 return ERR_PTR(-EIO);
dfb4f309 7354 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7355 if (calldata == NULL) {
7135840f 7356 nfs_put_client(clp);
71ac6da9 7357 return ERR_PTR(-ENOMEM);
fc01cea9 7358 }
a9c92d6b 7359 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7360 if (is_privileged)
7361 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7362 msg.rpc_argp = &calldata->args;
7363 msg.rpc_resp = &calldata->res;
7364 calldata->clp = clp;
71ac6da9 7365 task_setup_data.callback_data = calldata;
fc01cea9 7366
71ac6da9
TM		 7367 return rpc_run_task(&task_setup_data);
7368}
7369
2f60ea6b 7370static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7371{
7372 struct rpc_task *task;
7373 int ret = 0;
7374
2f60ea6b 7375 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7376 return -EAGAIN;
8fe72bac 7377 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7378 if (IS_ERR(task))
7379 ret = PTR_ERR(task);
7380 else
bf294b41 7381 rpc_put_task_async(task);
71ac6da9
TM		 7382 dprintk("<-- %s status=%d\n", __func__, ret);
7383 return ret;
7384}
7385
7386static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7387{
7388 struct rpc_task *task;
7389 int ret;
7390
8fe72bac 7391 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7392 if (IS_ERR(task)) {
7393 ret = PTR_ERR(task);
7394 goto out;
7395 }
7396 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7397 if (!ret) {
7398 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7399
7400 if (task->tk_status == 0)
7401 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7402 ret = task->tk_status;
b4410c2f 7403 }
71ac6da9
TM		 7404 rpc_put_task(task);
7405out:
7406 dprintk("<-- %s status=%d\n", __func__, ret);
7407 return ret;
fc01cea9
AA		 7408}
7409
fce5c838
RL		 7410struct nfs4_reclaim_complete_data {
7411 struct nfs_client *clp;
7412 struct nfs41_reclaim_complete_args arg;
7413 struct nfs41_reclaim_complete_res res;
7414};
7415
7416static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7417{
7418 struct nfs4_reclaim_complete_data *calldata = data;
7419
d9afbd1b
TM		 7420 nfs41_setup_sequence(calldata->clp->cl_session,
7421 &calldata->arg.seq_args,
7422 &calldata->res.seq_res,
7423 task);
fce5c838
RL		 7424}
7425
aa5190d0
TM		 7426static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7427{
7428 switch(task->tk_status) {
7429 case 0:
7430 case -NFS4ERR_COMPLETE_ALREADY:
7431 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7432 break;
7433 case -NFS4ERR_DELAY:
aa5190d0 7434 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7435 /* fall through */
7436 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7437 return -EAGAIN;
7438 default:
0400a6b0 7439 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7440 }
7441 return 0;
7442}
7443
fce5c838
RL		 7444static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7445{
7446 struct nfs4_reclaim_complete_data *calldata = data;
7447 struct nfs_client *clp = calldata->clp;
7448 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7449
7450 dprintk("--> %s\n", __func__);
14516c3a
TM		 7451 if (!nfs41_sequence_done(task, res))
7452 return;
fce5c838 7453
c6d01c6f 7454 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7455 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7456 rpc_restart_call_prepare(task);
7457 return;
7458 }
fce5c838
RL		 7459 dprintk("<-- %s\n", __func__);
7460}
7461
7462static void nfs4_free_reclaim_complete_data(void *data)
7463{
7464 struct nfs4_reclaim_complete_data *calldata = data;
7465
7466 kfree(calldata);
7467}
7468
7469static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7470 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7471 .rpc_call_done = nfs4_reclaim_complete_done,
7472 .rpc_release = nfs4_free_reclaim_complete_data,
7473};
7474
7475/*
7476 * Issue a global reclaim complete.
7477 */
965e9c23
TM		 7478static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7479 struct rpc_cred *cred)
fce5c838
RL		 7480{
7481 struct nfs4_reclaim_complete_data *calldata;
7482 struct rpc_task *task;
7483 struct rpc_message msg = {
7484 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7485 .rpc_cred = cred,
fce5c838
RL		 7486 };
7487 struct rpc_task_setup task_setup_data = {
7488 .rpc_client = clp->cl_rpcclient,
7489 .rpc_message = &msg,
7490 .callback_ops = &nfs4_reclaim_complete_call_ops,
7491 .flags = RPC_TASK_ASYNC,
7492 };
7493 int status = -ENOMEM;
7494
7495 dprintk("--> %s\n", __func__);
8535b2be 7496 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7497 if (calldata == NULL)
7498 goto out;
7499 calldata->clp = clp;
7500 calldata->arg.one_fs = 0;
fce5c838 7501
a9c92d6b 7502 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7503 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7504 msg.rpc_argp = &calldata->arg;
7505 msg.rpc_resp = &calldata->res;
7506 task_setup_data.callback_data = calldata;
7507 task = rpc_run_task(&task_setup_data);
acf82b85 7508 if (IS_ERR(task)) {
fce5c838 7509 status = PTR_ERR(task);
acf82b85
DC		 7510 goto out;
7511 }
c34c32ea
AA		 7512 status = nfs4_wait_for_completion_rpc_task(task);
7513 if (status == 0)
7514 status = task->tk_status;
fce5c838 7515 rpc_put_task(task);
acf82b85 7516 return 0;
fce5c838
RL		 7517out:
7518 dprintk("<-- %s status=%d\n", __func__, status);
7519 return status;
7520}
b1f69b75
AA		 7521
7522static void
7523nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7524{
7525 struct nfs4_layoutget *lgp = calldata;
c31663d4 7526 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7527 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7528
7529 dprintk("--> %s\n", __func__);
c31663d4
FI		 7530 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7531 * right now covering the LAYOUTGET we are about to send.
7532 * However, that is not so catastrophic, and there seems
7533 * to be no way to prevent it completely.
7534 */
6ba7db34 7535 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7536 &lgp->res.seq_res, task))
b1f69b75 7537 return;
cf7d63f1
FI		 7538 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7539 NFS_I(lgp->args.inode)->layout,
7540 lgp->args.ctx->state)) {
7541 rpc_exit(task, NFS4_OK);
cf7d63f1 7542 }
b1f69b75
AA		 7543}
7544
7545static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7546{
7547 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7548 struct inode *inode = lgp->args.inode;
7549 struct nfs_server *server = NFS_SERVER(inode);
7550 struct pnfs_layout_hdr *lo;
7551 struct nfs4_state *state = NULL;
ed7e5423 7552 unsigned long timeo, now, giveup;
b1f69b75 7553
ed7e5423 7554 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7555
6ba7db34 7556 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7557 goto out;
b1f69b75
AA		 7558
7559 switch (task->tk_status) {
7560 case 0:
ee314c2a 7561 goto out;
ed7e5423
BH		 7562 /*
7563 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7564 * (or clients) writing to the same RAID stripe
7565 */
b1f69b75 7566 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7567 /*
7568 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7569 * existing layout before getting a new one).
7570 */
b1f69b75 7571 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7572 timeo = rpc_get_timeout(task->tk_client);
7573 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7574 now = jiffies;
7575 if (time_after(giveup, now)) {
7576 unsigned long delay;
7577
7578 /* Delay for:
7579 * - Not less then NFS4_POLL_RETRY_MIN.
7580 * - One last time a jiffie before we give up
7581 * - exponential backoff (time_now minus start_attempt)
7582 */
7583 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7584 min((giveup - now - 1),
7585 now - lgp->args.timestamp));
7586
7587 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7588 __func__, delay);
7589 rpc_delay(task, delay);
7590 task->tk_status = 0;
7591 rpc_restart_call_prepare(task);
7592 goto out; /* Do not call nfs4_async_handle_error() */
7593 }
ee314c2a
TM		 7594 break;
7595 case -NFS4ERR_EXPIRED:
7596 case -NFS4ERR_BAD_STATEID:
7597 spin_lock(&inode->i_lock);
7598 lo = NFS_I(inode)->layout;
7599 if (!lo || list_empty(&lo->plh_segs)) {
7600 spin_unlock(&inode->i_lock);
7601 /* If the open stateid was bad, then recover it. */
7602 state = lgp->args.ctx->state;
7603 } else {
7604 LIST_HEAD(head);
7605
defb8460
CH		 7606 /*
7607 * Mark the bad layout state as invalid, then retry
7608 * with the current stateid.
7609 */
ee314c2a
TM		 7610 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7611 spin_unlock(&inode->i_lock);
ee314c2a 7612 pnfs_free_lseg_list(&head);
defb8460
CH		 7613
7614 task->tk_status = 0;
7615 rpc_restart_call_prepare(task);
b1f69b75
AA		 7616 }
7617 }
8478eaa1 7618 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
ee314c2a
TM		 7619 rpc_restart_call_prepare(task);
7620out:
b1f69b75
AA		 7621 dprintk("<-- %s\n", __func__);
7622}
7623
8554116e
IK		 7624static size_t max_response_pages(struct nfs_server *server)
7625{
7626 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7627 return nfs_page_array_len(0, max_resp_sz);
7628}
7629
7630static void nfs4_free_pages(struct page **pages, size_t size)
7631{
7632 int i;
7633
7634 if (!pages)
7635 return;
7636
7637 for (i = 0; i < size; i++) {
7638 if (!pages[i])
7639 break;
7640 __free_page(pages[i]);
7641 }
7642 kfree(pages);
7643}
7644
7645static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7646{
7647 struct page **pages;
7648 int i;
7649
7650 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7651 if (!pages) {
7652 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7653 return NULL;
7654 }
7655
7656 for (i = 0; i < size; i++) {
7657 pages[i] = alloc_page(gfp_flags);
7658 if (!pages[i]) {
7659 dprintk("%s: failed to allocate page\n", __func__);
7660 nfs4_free_pages(pages, size);
7661 return NULL;
7662 }
7663 }
7664
7665 return pages;
7666}
7667
b1f69b75
AA		 7668static void nfs4_layoutget_release(void *calldata)
7669{
7670 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7671 struct inode *inode = lgp->args.inode;
7672 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7673 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7674
7675 dprintk("--> %s\n", __func__);
8554116e 7676 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7677 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7678 put_nfs_open_context(lgp->args.ctx);
7679 kfree(calldata);
7680 dprintk("<-- %s\n", __func__);
7681}
7682
7683static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7684 .rpc_call_prepare = nfs4_layoutget_prepare,
7685 .rpc_call_done = nfs4_layoutget_done,
7686 .rpc_release = nfs4_layoutget_release,
7687};
7688
a0b0a6e3
TM		 7689struct pnfs_layout_segment *
7690nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7691{
a47970ff
WAA		 7692 struct inode *inode = lgp->args.inode;
7693 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7694 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7695 struct rpc_task *task;
7696 struct rpc_message msg = {
7697 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7698 .rpc_argp = &lgp->args,
7699 .rpc_resp = &lgp->res,
6ab59344 7700 .rpc_cred = lgp->cred,
b1f69b75
AA		 7701 };
7702 struct rpc_task_setup task_setup_data = {
7703 .rpc_client = server->client,
7704 .rpc_message = &msg,
7705 .callback_ops = &nfs4_layoutget_call_ops,
7706 .callback_data = lgp,
7707 .flags = RPC_TASK_ASYNC,
7708 };
a0b0a6e3 7709 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7710 int status = 0;
7711
7712 dprintk("--> %s\n", __func__);
7713
4bd5a980
PT		 7714 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7715 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7716
8554116e
IK		 7717 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7718 if (!lgp->args.layout.pages) {
7719 nfs4_layoutget_release(lgp);
a0b0a6e3 7720 return ERR_PTR(-ENOMEM);
8554116e
IK		 7721 }
7722 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7723 lgp->args.timestamp = jiffies;
8554116e 7724
35124a09 7725 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7726 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7727 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 7728
b1f69b75
AA		 7729 task = rpc_run_task(&task_setup_data);
7730 if (IS_ERR(task))
a0b0a6e3 7731 return ERR_CAST(task);
b1f69b75 7732 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7733 if (status == 0)
7734 status = task->tk_status;
1037e6ea
TM		 7735 trace_nfs4_layoutget(lgp->args.ctx,
7736 &lgp->args.range,
7737 &lgp->res.range,
7738 status);
085b7a45
WAA		 7739 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7740 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7741 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7742 rpc_put_task(task);
7743 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7744 if (status)
7745 return ERR_PTR(status);
7746 return lseg;
b1f69b75
AA		 7747}
7748
cbe82603
BH		 7749static void
7750nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7751{
7752 struct nfs4_layoutreturn *lrp = calldata;
7753
7754 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7755 nfs41_setup_sequence(lrp->clp->cl_session,
7756 &lrp->args.seq_args,
7757 &lrp->res.seq_res,
7758 task);
cbe82603
BH		 7759}
7760
7761static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7762{
7763 struct nfs4_layoutreturn *lrp = calldata;
7764 struct nfs_server *server;
7765
7766 dprintk("--> %s\n", __func__);
7767
6ba7db34 7768 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7769 return;
7770
7771 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7772 switch (task->tk_status) {
7773 default:
7774 task->tk_status = 0;
7775 case 0:
7776 break;
7777 case -NFS4ERR_DELAY:
8478eaa1 7778 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 7779 break;
d00c5d43 7780 rpc_restart_call_prepare(task);
cbe82603
BH		 7781 return;
7782 }
cbe82603
BH		 7783 dprintk("<-- %s\n", __func__);
7784}
7785
7786static void nfs4_layoutreturn_release(void *calldata)
7787{
7788 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7789 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7790
7791 dprintk("--> %s\n", __func__);
849b286f
TM		 7792 spin_lock(&lo->plh_inode->i_lock);
7793 if (lrp->res.lrs_present)
7794 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7795 lo->plh_block_lgets--;
7796 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7797 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 7798 kfree(calldata);
7799 dprintk("<-- %s\n", __func__);
7800}
7801
7802static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7803 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7804 .rpc_call_done = nfs4_layoutreturn_done,
7805 .rpc_release = nfs4_layoutreturn_release,
7806};
7807
7808int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7809{
7810 struct rpc_task *task;
7811 struct rpc_message msg = {
7812 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7813 .rpc_argp = &lrp->args,
7814 .rpc_resp = &lrp->res,
9556000d 7815 .rpc_cred = lrp->cred,
cbe82603
BH		 7816 };
7817 struct rpc_task_setup task_setup_data = {
1771c577 7818 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7819 .rpc_message = &msg,
7820 .callback_ops = &nfs4_layoutreturn_call_ops,
7821 .callback_data = lrp,
7822 };
7823 int status;
7824
7825 dprintk("--> %s\n", __func__);
a9c92d6b 7826 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7827 task = rpc_run_task(&task_setup_data);
7828 if (IS_ERR(task))
7829 return PTR_ERR(task);
7830 status = task->tk_status;
1037e6ea 7831 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7832 dprintk("<-- %s status=%d\n", __func__, status);
7833 rpc_put_task(task);
7834 return status;
7835}
7836
b1f69b75 7837static int
cd5875fe
TM		 7838_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7839 struct pnfs_device *pdev,
7840 struct rpc_cred *cred)
b1f69b75
AA		 7841{
7842 struct nfs4_getdeviceinfo_args args = {
7843 .pdev = pdev,
7844 };
7845 struct nfs4_getdeviceinfo_res res = {
7846 .pdev = pdev,
7847 };
7848 struct rpc_message msg = {
7849 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7850 .rpc_argp = &args,
7851 .rpc_resp = &res,
cd5875fe 7852 .rpc_cred = cred,
b1f69b75
AA		 7853 };
7854 int status;
7855
7856 dprintk("--> %s\n", __func__);
7c513058 7857 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7858 dprintk("<-- %s status=%d\n", __func__, status);
7859
7860 return status;
7861}
7862
cd5875fe
TM		 7863int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7864 struct pnfs_device *pdev,
7865 struct rpc_cred *cred)
b1f69b75
AA		 7866{
7867 struct nfs4_exception exception = { };
7868 int err;
7869
7870 do {
7871 err = nfs4_handle_exception(server,
cd5875fe 7872 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7873 &exception);
7874 } while (exception.retry);
7875 return err;
7876}
7877EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7878
863a3c6c
AA		 7879static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7880{
7881 struct nfs4_layoutcommit_data *data = calldata;
7882 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7883 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7884
d9afbd1b
TM		 7885 nfs41_setup_sequence(session,
7886 &data->args.seq_args,
7887 &data->res.seq_res,
7888 task);
863a3c6c
AA		 7889}
7890
7891static void
7892nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7893{
7894 struct nfs4_layoutcommit_data *data = calldata;
7895 struct nfs_server *server = NFS_SERVER(data->args.inode);
7896
6ba7db34 7897 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7898 return;
7899
7900 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7901 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7902 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7903 case -NFS4ERR_BADLAYOUT: /* no layout */
7904 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7905 task->tk_status = 0;
e59d27e0 7906 case 0:
e59d27e0
TM		 7907 break;
7908 default:
8478eaa1 7909 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 7910 rpc_restart_call_prepare(task);
7911 return;
7912 }
7913 }
863a3c6c
AA		 7914}
7915
7916static void nfs4_layoutcommit_release(void *calldata)
7917{
7918 struct nfs4_layoutcommit_data *data = calldata;
7919
db29c089 7920 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 7921 nfs_post_op_update_inode_force_wcc(data->args.inode,
7922 data->res.fattr);
863a3c6c
AA		 7923 put_rpccred(data->cred);
7924 kfree(data);
7925}
7926
7927static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7928 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7929 .rpc_call_done = nfs4_layoutcommit_done,
7930 .rpc_release = nfs4_layoutcommit_release,
7931};
7932
7933int
ef311537 7934nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7935{
7936 struct rpc_message msg = {
7937 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7938 .rpc_argp = &data->args,
7939 .rpc_resp = &data->res,
7940 .rpc_cred = data->cred,
7941 };
7942 struct rpc_task_setup task_setup_data = {
7943 .task = &data->task,
7944 .rpc_client = NFS_CLIENT(data->args.inode),
7945 .rpc_message = &msg,
7946 .callback_ops = &nfs4_layoutcommit_ops,
7947 .callback_data = data,
7948 .flags = RPC_TASK_ASYNC,
7949 };
7950 struct rpc_task *task;
7951 int status = 0;
7952
7953 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7954 "lbw: %llu inode %lu\n",
7955 data->task.tk_pid, sync,
7956 data->args.lastbytewritten,
7957 data->args.inode->i_ino);
7958
a9c92d6b 7959 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7960 task = rpc_run_task(&task_setup_data);
7961 if (IS_ERR(task))
7962 return PTR_ERR(task);
ef311537 7963 if (sync == false)
863a3c6c
AA		 7964 goto out;
7965 status = nfs4_wait_for_completion_rpc_task(task);
7966 if (status != 0)
7967 goto out;
7968 status = task->tk_status;
1037e6ea 7969 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7970out:
7971 dprintk("%s: status %d\n", __func__, status);
7972 rpc_put_task(task);
7973 return status;
7974}
fca78d6d 7975
97431204
AA		 7976/**
7977 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7978 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7979 */
fca78d6d
BS		 7980static int
7981_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 7982 struct nfs_fsinfo *info,
7983 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 7984{
7985 struct nfs41_secinfo_no_name_args args = {
7986 .style = SECINFO_STYLE_CURRENT_FH,
7987 };
7988 struct nfs4_secinfo_res res = {
7989 .flavors = flavors,
7990 };
7991 struct rpc_message msg = {
7992 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7993 .rpc_argp = &args,
7994 .rpc_resp = &res,
7995 };
b1b3e136 7996 struct rpc_clnt *clnt = server->client;
7cb852df 7997 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 7998 int status;
7999
8000 if (use_integrity) {
8001 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8002 cred = nfs4_get_clid_cred(server->nfs_client);
8003 msg.rpc_cred = cred;
b1b3e136
WAA		 8004 }
8005
8006 dprintk("--> %s\n", __func__);
8007 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8008 &res.seq_res, 0);
8009 dprintk("<-- %s status=%d\n", __func__, status);
8010
7cb852df
WAA		 8011 if (cred)
8012 put_rpccred(cred);
b1b3e136
WAA		 8013
8014 return status;
fca78d6d
BS		 8015}
8016
8017static int
8018nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8019 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8020{
8021 struct nfs4_exception exception = { };
8022 int err;
8023 do {
b1b3e136
WAA		 8024 /* first try using integrity protection */
8025 err = -NFS4ERR_WRONGSEC;
8026
8027 /* try to use integrity protection with machine cred */
8028 if (_nfs4_is_integrity_protected(server->nfs_client))
8029 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8030 flavors, true);
8031
8032 /*
8033 * if unable to use integrity protection, or SECINFO with
8034 * integrity protection returns NFS4ERR_WRONGSEC (which is
8035 * disallowed by spec, but exists in deployed servers) use
8036 * the current filesystem's rpc_client and the user cred.
8037 */
8038 if (err == -NFS4ERR_WRONGSEC)
8039 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8040 flavors, false);
8041
fca78d6d
BS		 8042 switch (err) {
8043 case 0:
8044 case -NFS4ERR_WRONGSEC:
78b19bae 8045 case -ENOTSUPP:
05e9cfb4 8046 goto out;
fca78d6d
BS		 8047 default:
8048 err = nfs4_handle_exception(server, err, &exception);
8049 }
8050 } while (exception.retry);
05e9cfb4 8051out:
fca78d6d
BS		 8052 return err;
8053}
8054
8055static int
8056nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8057 struct nfs_fsinfo *info)
8058{
8059 int err;
8060 struct page *page;
367156d9 8061 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8062 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8063 struct nfs4_secinfo4 *secinfo;
8064 int i;
fca78d6d
BS		 8065
8066 page = alloc_page(GFP_KERNEL);
8067 if (!page) {
8068 err = -ENOMEM;
8069 goto out;
8070 }
8071
8072 flavors = page_address(page);
8073 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8074
8075 /*
8076 * Fall back on "guess and check" method if
8077 * the server doesn't support SECINFO_NO_NAME
8078 */
78b19bae 8079 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8080 err = nfs4_find_root_sec(server, fhandle, info);
8081 goto out_freepage;
8082 }
8083 if (err)
8084 goto out_freepage;
8085
58a8cf12
WAA		 8086 for (i = 0; i < flavors->num_flavors; i++) {
8087 secinfo = &flavors->flavors[i];
8088
8089 switch (secinfo->flavor) {
8090 case RPC_AUTH_NULL:
8091 case RPC_AUTH_UNIX:
8092 case RPC_AUTH_GSS:
8093 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8094 &secinfo->flavor_info);
8095 break;
8096 default:
8097 flavor = RPC_AUTH_MAXFLAVOR;
8098 break;
8099 }
8100
4d4b69dd
WAA		 8101 if (!nfs_auth_info_match(&server->auth_info, flavor))
8102 flavor = RPC_AUTH_MAXFLAVOR;
8103
58a8cf12
WAA		 8104 if (flavor != RPC_AUTH_MAXFLAVOR) {
8105 err = nfs4_lookup_root_sec(server, fhandle,
8106 info, flavor);
8107 if (!err)
8108 break;
8109 }
8110 }
8111
8112 if (flavor == RPC_AUTH_MAXFLAVOR)
8113 err = -EPERM;
fca78d6d
BS		 8114
8115out_freepage:
8116 put_page(page);
8117 if (err == -EACCES)
8118 return -EPERM;
8119out:
8120 return err;
8121}
1cab0652 8122
ab7cb0df
TM		 8123static int _nfs41_test_stateid(struct nfs_server *server,
8124 nfs4_stateid *stateid,
8125 struct rpc_cred *cred)
7d974794
BS		 8126{
8127 int status;
8128 struct nfs41_test_stateid_args args = {
1cab0652 8129 .stateid = stateid,
7d974794
BS		 8130 };
8131 struct nfs41_test_stateid_res res;
8132 struct rpc_message msg = {
8133 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8134 .rpc_argp = &args,
8135 .rpc_resp = &res,
ab7cb0df 8136 .rpc_cred = cred,
7d974794 8137 };
3787d506
WAA		 8138 struct rpc_clnt *rpc_client = server->client;
8139
8140 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8141 &rpc_client, &msg);
1cab0652 8142
38527b15 8143 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8144 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8145 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8146 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8147 &args.seq_args, &res.seq_res);
38527b15
CL		 8148 if (status != NFS_OK) {
8149 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8150 return status;
38527b15
CL		 8151 }
8152 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8153 return -res.status;
7d974794
BS		 8154}
8155
38527b15
CL		 8156/**
8157 * nfs41_test_stateid - perform a TEST_STATEID operation
8158 *
8159 * @server: server / transport on which to perform the operation
8160 * @stateid: state ID to test
ab7cb0df 8161 * @cred: credential
38527b15
CL		 8162 *
8163 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8164 * Otherwise a negative NFS4ERR value is returned if the operation
8165 * failed or the state ID is not currently valid.
8166 */
ab7cb0df
TM		 8167static int nfs41_test_stateid(struct nfs_server *server,
8168 nfs4_stateid *stateid,
8169 struct rpc_cred *cred)
7d974794
BS		 8170{
8171 struct nfs4_exception exception = { };
8172 int err;
8173 do {
ab7cb0df 8174 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8175 if (err != -NFS4ERR_DELAY)
8176 break;
8177 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8178 } while (exception.retry);
8179 return err;
8180}
9aeda35f 8181
7c1d5fae
TM		 8182struct nfs_free_stateid_data {
8183 struct nfs_server *server;
8184 struct nfs41_free_stateid_args args;
9aeda35f 8185 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8186};
8187
8188static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8189{
8190 struct nfs_free_stateid_data *data = calldata;
8191 nfs41_setup_sequence(nfs4_get_session(data->server),
8192 &data->args.seq_args,
8193 &data->res.seq_res,
8194 task);
8195}
8196
8197static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8198{
8199 struct nfs_free_stateid_data *data = calldata;
8200
8201 nfs41_sequence_done(task, &data->res.seq_res);
8202
8203 switch (task->tk_status) {
8204 case -NFS4ERR_DELAY:
8478eaa1 8205 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8206 rpc_restart_call_prepare(task);
8207 }
8208}
8209
8210static void nfs41_free_stateid_release(void *calldata)
8211{
8212 kfree(calldata);
8213}
8214
17f26b12 8215static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8216 .rpc_call_prepare = nfs41_free_stateid_prepare,
8217 .rpc_call_done = nfs41_free_stateid_done,
8218 .rpc_release = nfs41_free_stateid_release,
8219};
8220
8221static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8222 nfs4_stateid *stateid,
ab7cb0df 8223 struct rpc_cred *cred,
7c1d5fae
TM		 8224 bool privileged)
8225{
9aeda35f
BS		 8226 struct rpc_message msg = {
8227 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8228 .rpc_cred = cred,
9aeda35f 8229 };
7c1d5fae
TM		 8230 struct rpc_task_setup task_setup = {
8231 .rpc_client = server->client,
8232 .rpc_message = &msg,
8233 .callback_ops = &nfs41_free_stateid_ops,
8234 .flags = RPC_TASK_ASYNC,
8235 };
8236 struct nfs_free_stateid_data *data;
9aeda35f 8237
3787d506
WAA		 8238 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8239 &task_setup.rpc_client, &msg);
8240
38527b15 8241 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8242 data = kmalloc(sizeof(*data), GFP_NOFS);
8243 if (!data)
8244 return ERR_PTR(-ENOMEM);
8245 data->server = server;
8246 nfs4_stateid_copy(&data->args.stateid, stateid);
8247
8248 task_setup.callback_data = data;
8249
8250 msg.rpc_argp = &data->args;
8251 msg.rpc_resp = &data->res;
a9c92d6b 8252 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8253 if (privileged)
8254 nfs4_set_sequence_privileged(&data->args.seq_args);
8255
8256 return rpc_run_task(&task_setup);
9aeda35f
BS		 8257}
8258
38527b15
CL		 8259/**
8260 * nfs41_free_stateid - perform a FREE_STATEID operation
8261 *
8262 * @server: server / transport on which to perform the operation
8263 * @stateid: state ID to release
ab7cb0df 8264 * @cred: credential
38527b15
CL		 8265 *
8266 * Returns NFS_OK if the server freed "stateid". Otherwise a
8267 * negative NFS4ERR value is returned.
8268 */
ab7cb0df
TM		 8269static int nfs41_free_stateid(struct nfs_server *server,
8270 nfs4_stateid *stateid,
8271 struct rpc_cred *cred)
9aeda35f 8272{
7c1d5fae
TM		 8273 struct rpc_task *task;
8274 int ret;
8275
ab7cb0df 8276 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8277 if (IS_ERR(task))
8278 return PTR_ERR(task);
8279 ret = rpc_wait_for_completion_task(task);
8280 if (!ret)
8281 ret = task->tk_status;
8282 rpc_put_task(task);
8283 return ret;
9aeda35f 8284}
36281caa 8285
f1cdae87
JL		 8286static void
8287nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8288{
8289 struct rpc_task *task;
ab7cb0df 8290 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8291
ab7cb0df 8292 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8293 nfs4_free_lock_state(server, lsp);
8294 if (IS_ERR(task))
f1cdae87 8295 return;
c8b2d0bf 8296 rpc_put_task(task);
c8b2d0bf
TM		 8297}
8298
36281caa
TM		 8299static bool nfs41_match_stateid(const nfs4_stateid *s1,
8300 const nfs4_stateid *s2)
8301{
2d2f24ad 8302 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8303 return false;
8304
2d2f24ad 8305 if (s1->seqid == s2->seqid)
36281caa 8306 return true;
2d2f24ad 8307 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8308 return true;
8309
8310 return false;
8311}
8312
557134a3
AA		 8313#endif /* CONFIG_NFS_V4_1 */
8314
36281caa
TM		 8315static bool nfs4_match_stateid(const nfs4_stateid *s1,
8316 const nfs4_stateid *s2)
8317{
f597c537 8318 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8319}
8320
8321
17280175 8322static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8323 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8324 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8325 .recover_open = nfs4_open_reclaim,
8326 .recover_lock = nfs4_lock_reclaim,
591d71cb 8327 .establish_clid = nfs4_init_clientid,
05f4c350 8328 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8329};
8330
591d71cb 8331#if defined(CONFIG_NFS_V4_1)
17280175 8332static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8333 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8334 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8335 .recover_open = nfs4_open_reclaim,
8336 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8337 .establish_clid = nfs41_init_clientid,
fce5c838 8338 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8339 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8340};
8341#endif /* CONFIG_NFS_V4_1 */
8342
17280175 8343static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8344 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8345 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8346 .recover_open = nfs40_open_expired,
591d71cb
AA		 8347 .recover_lock = nfs4_lock_expired,
8348 .establish_clid = nfs4_init_clientid,
8349};
8350
8351#if defined(CONFIG_NFS_V4_1)
17280175 8352static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8353 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8354 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8355 .recover_open = nfs41_open_expired,
8356 .recover_lock = nfs41_lock_expired,
4d643d1d 8357 .establish_clid = nfs41_init_clientid,
1da177e4 8358};
591d71cb 8359#endif /* CONFIG_NFS_V4_1 */
1da177e4 8360
17280175 8361static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8362 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8363 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8364 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8365};
8366
8367#if defined(CONFIG_NFS_V4_1)
17280175 8368static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8369 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8370 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8371 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8372};
8373#endif
8374
ec011fe8 8375static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8376 .get_locations = _nfs40_proc_get_locations,
44c99933 8377 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8378};
8379
8380#if defined(CONFIG_NFS_V4_1)
8381static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8382 .get_locations = _nfs41_proc_get_locations,
44c99933 8383 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8384};
8385#endif /* CONFIG_NFS_V4_1 */
8386
97dc1359
TM		 8387static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8388 .minor_version = 0,
39c6daae
TM		 8389 .init_caps = NFS_CAP_READDIRPLUS
8390 | NFS_CAP_ATOMIC_OPEN
8391 | NFS_CAP_CHANGE_ATTR
8392 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8393 .init_client = nfs40_init_client,
8394 .shutdown_client = nfs40_shutdown_client,
36281caa 8395 .match_stateid = nfs4_match_stateid,
fca78d6d 8396 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8397 .free_lock_state = nfs4_release_lockowner,
9915ea7e 8398 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8399 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8400 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8401 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8402 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8403};
8404
8405#if defined(CONFIG_NFS_V4_1)
8406static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8407 .minor_version = 1,
39c6daae
TM		 8408 .init_caps = NFS_CAP_READDIRPLUS
8409 | NFS_CAP_ATOMIC_OPEN
8410 | NFS_CAP_CHANGE_ATTR
3b66486c 8411 | NFS_CAP_POSIX_LOCK
49f9a0fa 8412 | NFS_CAP_STATEID_NFSV41
e983120e 8413 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8414 .init_client = nfs41_init_client,
8415 .shutdown_client = nfs41_shutdown_client,
36281caa 8416 .match_stateid = nfs41_match_stateid,
fca78d6d 8417 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8418 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8419 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8420 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8421 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8422 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8423 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8424};
8425#endif
8426
42c2c424
SD		 8427#if defined(CONFIG_NFS_V4_2)
8428static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8429 .minor_version = 2,
7017310a
BS		 8430 .init_caps = NFS_CAP_READDIRPLUS
8431 | NFS_CAP_ATOMIC_OPEN
8432 | NFS_CAP_CHANGE_ATTR
8433 | NFS_CAP_POSIX_LOCK
8434 | NFS_CAP_STATEID_NFSV41
e983120e 8435 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8436 | NFS_CAP_ALLOCATE
624bd5b7 8437 | NFS_CAP_DEALLOCATE
e983120e 8438 | NFS_CAP_SEEK,
abf79bb3
CL		 8439 .init_client = nfs41_init_client,
8440 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8441 .match_stateid = nfs41_match_stateid,
8442 .find_root_sec = nfs41_find_root_sec,
7017310a 8443 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8444 .call_sync_ops = &nfs41_call_sync_ops,
42c2c424
SD		 8445 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8446 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8447 .state_renewal_ops = &nfs41_state_renewal_ops,
8448};
8449#endif
8450
97dc1359
TM		 8451const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8452 [0] = &nfs_v4_0_minor_ops,
8453#if defined(CONFIG_NFS_V4_1)
8454 [1] = &nfs_v4_1_minor_ops,
8455#endif
42c2c424
SD		 8456#if defined(CONFIG_NFS_V4_2)
8457 [2] = &nfs_v4_2_minor_ops,
8458#endif
97dc1359
TM		 8459};
8460
17f26b12 8461static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8462 .create = nfs_create,
8463 .lookup = nfs_lookup,
8464 .atomic_open = nfs_atomic_open,
8465 .link = nfs_link,
8466 .unlink = nfs_unlink,
8467 .symlink = nfs_symlink,
8468 .mkdir = nfs_mkdir,
8469 .rmdir = nfs_rmdir,
8470 .mknod = nfs_mknod,
8471 .rename = nfs_rename,
8472 .permission = nfs_permission,
8473 .getattr = nfs_getattr,
8474 .setattr = nfs_setattr,
8475 .getxattr = generic_getxattr,
8476 .setxattr = generic_setxattr,
8477 .listxattr = generic_listxattr,
8478 .removexattr = generic_removexattr,
8479};
8480
92e1d5be 8481static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8482 .permission = nfs_permission,
8483 .getattr = nfs_getattr,
8484 .setattr = nfs_setattr,
64c2ce8b
AK		 8485 .getxattr = generic_getxattr,
8486 .setxattr = generic_setxattr,
8487 .listxattr = generic_listxattr,
8488 .removexattr = generic_removexattr,
6b3b5496
BF		 8489};
8490
509de811 8491const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8492 .version = 4, /* protocol version */
8493 .dentry_ops = &nfs4_dentry_operations,
8494 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8495 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8496 .file_ops = &nfs4_file_operations,
1da177e4 8497 .getroot = nfs4_proc_get_root,
281cad46 8498 .submount = nfs4_submount,
ff9099f2 8499 .try_mount = nfs4_try_mount,
1da177e4
LT		 8500 .getattr = nfs4_proc_getattr,
8501 .setattr = nfs4_proc_setattr,
8502 .lookup = nfs4_proc_lookup,
8503 .access = nfs4_proc_access,
8504 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8505 .create = nfs4_proc_create,
8506 .remove = nfs4_proc_remove,
8507 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8508 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8509 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8510 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8511 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8512 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8513 .link = nfs4_proc_link,
8514 .symlink = nfs4_proc_symlink,
8515 .mkdir = nfs4_proc_mkdir,
8516 .rmdir = nfs4_proc_remove,
8517 .readdir = nfs4_proc_readdir,
8518 .mknod = nfs4_proc_mknod,
8519 .statfs = nfs4_proc_statfs,
8520 .fsinfo = nfs4_proc_fsinfo,
8521 .pathconf = nfs4_proc_pathconf,
e9326dca 8522 .set_capabilities = nfs4_server_capabilities,
1da177e4 8523 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8524 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8525 .read_setup = nfs4_proc_read_setup,
ec06c096 8526 .read_done = nfs4_read_done,
1da177e4 8527 .write_setup = nfs4_proc_write_setup,
788e7a89 8528 .write_done = nfs4_write_done,
1da177e4 8529 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8530 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8531 .commit_done = nfs4_commit_done,
1da177e4 8532 .lock = nfs4_proc_lock,
e50a1c2e 8533 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8534 .close_context = nfs4_close_context,
2b484297 8535 .open_context = nfs4_atomic_open,
011e2a7f 8536 .have_delegation = nfs4_have_delegation,
57ec14c5 8537 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8538 .alloc_client = nfs4_alloc_client,
45a52a02 8539 .init_client = nfs4_init_client,
cdb7eced 8540 .free_client = nfs4_free_client,
1179acc6
BS		 8541 .create_server = nfs4_create_server,
8542 .clone_server = nfs_clone_server,
1da177e4
LT		 8543};
8544
64c2ce8b
AK		 8545static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8546 .prefix = XATTR_NAME_NFSV4_ACL,
8547 .list = nfs4_xattr_list_nfs4_acl,
8548 .get = nfs4_xattr_get_nfs4_acl,
8549 .set = nfs4_xattr_set_nfs4_acl,
8550};
8551
8552const struct xattr_handler *nfs4_xattr_handlers[] = {
8553 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8554#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8555 &nfs4_xattr_nfs4_label_handler,
8556#endif
64c2ce8b
AK		 8557 NULL
8558};
8559
1da177e4
LT		 8560/*
8561 * Local variables:
8562 * c-basic-offset: 8
8563 * End:
8564 */
Linux 6.x block layer and io_uring tree(s)